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Merge branch 'ppc-bundle' (bundle from Michael Ellerman)
[linux.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <[email protected]>
10 * Andy Adamson <[email protected]>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
64c2ce8b 54#include <linux/xattr.h>
c7a360b0 55#include <linux/utsname.h>
d310310c 56#include <linux/freezer.h>
1da177e4 57
4ce79717 58#include "nfs4_fs.h"
1da177e4 59#include "delegation.h"
101070ca 60#include "internal.h"
006ea73e 61#include "iostat.h"
fc931582 62#include "callback.h"
b1f69b75 63#include "pnfs.h"
f092075d 64#include "netns.h"
40c64c26 65#include "nfs4idmap.h"
73e39aaa 66#include "nfs4session.h"
de242c0b 67#include "fscache.h"
1da177e4 68
c6d01c6f
TM		 69#include "nfs4trace.h"
70
1da177e4
LT		 71#define NFSDBG_FACILITY NFSDBG_PROC
72
2066fe89 73#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 74#define NFS4_POLL_RETRY_MAX (15*HZ)
75
a1d1c4f1
TM		 76/* file attributes which can be mapped to nfs attributes */
77#define NFS4_VALID_ATTRS (ATTR_MODE \
78 | ATTR_UID \
79 | ATTR_GID \
80 | ATTR_SIZE \
81 | ATTR_ATIME \
82 | ATTR_MTIME \
83 | ATTR_CTIME \
84 | ATTR_ATIME_SET \
85 | ATTR_MTIME_SET)
86
cdd4e68b 87struct nfs4_opendata;
864472e9 88static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 89static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 90static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
81934ddb 91static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 92static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
93static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 94static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
95 struct nfs_fattr *fattr, struct iattr *sattr,
29b59f94 96 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
1775fd3e 97 struct nfs4_label *olabel);
f062eb6c 98#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 99static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
100 struct rpc_cred *);
f0b0bf88
TM		 101static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *,
102 struct rpc_cred *, bool);
f062eb6c 103#endif
aa9c2669
DQ		 104
105#ifdef CONFIG_NFS_V4_SECURITY_LABEL
106static inline struct nfs4_label *
107nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
108 struct iattr *sattr, struct nfs4_label *label)
109{
110 int err;
111
112 if (label == NULL)
113 return NULL;
114
115 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
116 return NULL;
117
aa9c2669
DQ		 118 err = security_dentry_init_security(dentry, sattr->ia_mode,
119 &dentry->d_name, (void **)&label->label, &label->len);
120 if (err == 0)
121 return label;
122
123 return NULL;
124}
125static inline void
126nfs4_label_release_security(struct nfs4_label *label)
127{
128 if (label)
129 security_release_secctx(label->label, label->len);
130}
131static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
132{
133 if (label)
134 return server->attr_bitmask;
135
136 return server->attr_bitmask_nl;
137}
138#else
139static inline struct nfs4_label *
140nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
141 struct iattr *sattr, struct nfs4_label *l)
142{ return NULL; }
143static inline void
144nfs4_label_release_security(struct nfs4_label *label)
145{ return; }
146static inline u32 *
147nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
148{ return server->attr_bitmask; }
149#endif
150
1da177e4 151/* Prevent leaks of NFSv4 errors into userland */
46f72f57 152static int nfs4_map_errors(int err)
1da177e4 153{
52567b03
TM		 154 if (err >= -1000)
155 return err;
156 switch (err) {
157 case -NFS4ERR_RESOURCE:
30005121
WAA		 158 case -NFS4ERR_LAYOUTTRYLATER:
159 case -NFS4ERR_RECALLCONFLICT:
52567b03 160 return -EREMOTEIO;
7ebb9315 161 case -NFS4ERR_WRONGSEC:
8897538e 162 case -NFS4ERR_WRONG_CRED:
7ebb9315 163 return -EPERM;
3ddeb7c5
TM		 164 case -NFS4ERR_BADOWNER:
165 case -NFS4ERR_BADNAME:
166 return -EINVAL;
fb13bfa7
TM		 167 case -NFS4ERR_SHARE_DENIED:
168 return -EACCES;
f25efd85
SD		 169 case -NFS4ERR_MINOR_VERS_MISMATCH:
170 return -EPROTONOSUPPORT;
6e3cf241
TM		 171 case -NFS4ERR_FILE_OPEN:
172 return -EBUSY;
52567b03 173 default:
1da177e4 174 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 175 __func__, -err);
52567b03 176 break;
1da177e4 177 }
52567b03 178 return -EIO;
1da177e4
LT		 179}
180
181/*
182 * This is our standard bitmap for GETATTR requests.
183 */
1549210f 184const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 185 FATTR4_WORD0_TYPE
186 | FATTR4_WORD0_CHANGE
187 | FATTR4_WORD0_SIZE
188 | FATTR4_WORD0_FSID
189 | FATTR4_WORD0_FILEID,
190 FATTR4_WORD1_MODE
191 | FATTR4_WORD1_NUMLINKS
192 | FATTR4_WORD1_OWNER
193 | FATTR4_WORD1_OWNER_GROUP
194 | FATTR4_WORD1_RAWDEV
195 | FATTR4_WORD1_SPACE_USED
196 | FATTR4_WORD1_TIME_ACCESS
197 | FATTR4_WORD1_TIME_METADATA
ea96d1ec
AS		 198 | FATTR4_WORD1_TIME_MODIFY
199 | FATTR4_WORD1_MOUNTED_ON_FILEID,
aa9c2669
DQ		 200#ifdef CONFIG_NFS_V4_SECURITY_LABEL
201 FATTR4_WORD2_SECURITY_LABEL
202#endif
1da177e4
LT		 203};
204
1549210f
TM		 205static const u32 nfs4_pnfs_open_bitmap[3] = {
206 FATTR4_WORD0_TYPE
207 | FATTR4_WORD0_CHANGE
208 | FATTR4_WORD0_SIZE
209 | FATTR4_WORD0_FSID
210 | FATTR4_WORD0_FILEID,
211 FATTR4_WORD1_MODE
212 | FATTR4_WORD1_NUMLINKS
213 | FATTR4_WORD1_OWNER
214 | FATTR4_WORD1_OWNER_GROUP
215 | FATTR4_WORD1_RAWDEV
216 | FATTR4_WORD1_SPACE_USED
217 | FATTR4_WORD1_TIME_ACCESS
218 | FATTR4_WORD1_TIME_METADATA
219 | FATTR4_WORD1_TIME_MODIFY,
220 FATTR4_WORD2_MDSTHRESHOLD
95864c91
TM		 221#ifdef CONFIG_NFS_V4_SECURITY_LABEL
222 | FATTR4_WORD2_SECURITY_LABEL
223#endif
1549210f
TM		 224};
225
e23008ec
AA		 226static const u32 nfs4_open_noattr_bitmap[3] = {
227 FATTR4_WORD0_TYPE
e23008ec
AA		 228 | FATTR4_WORD0_FILEID,
229};
230
a09df2ca 231const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 232 FATTR4_WORD0_FILES_AVAIL
233 | FATTR4_WORD0_FILES_FREE
234 | FATTR4_WORD0_FILES_TOTAL,
235 FATTR4_WORD1_SPACE_AVAIL
236 | FATTR4_WORD1_SPACE_FREE
237 | FATTR4_WORD1_SPACE_TOTAL
238};
239
a09df2ca 240const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 241 FATTR4_WORD0_MAXLINK
242 | FATTR4_WORD0_MAXNAME,
243 0
244};
245
dae100c2 246const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 247 | FATTR4_WORD0_MAXREAD
248 | FATTR4_WORD0_MAXWRITE
249 | FATTR4_WORD0_LEASE_TIME,
55b6e774 250 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 251 | FATTR4_WORD1_FS_LAYOUT_TYPES,
252 FATTR4_WORD2_LAYOUT_BLKSIZE
2a92ee92 253 | FATTR4_WORD2_CLONE_BLKSIZE
1da177e4
LT		 254};
255
a09df2ca 256const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 257 FATTR4_WORD0_TYPE
258 | FATTR4_WORD0_CHANGE
259 | FATTR4_WORD0_SIZE
260 | FATTR4_WORD0_FSID
261 | FATTR4_WORD0_FILEID
262 | FATTR4_WORD0_FS_LOCATIONS,
263 FATTR4_WORD1_MODE
264 | FATTR4_WORD1_NUMLINKS
265 | FATTR4_WORD1_OWNER
266 | FATTR4_WORD1_OWNER_GROUP
267 | FATTR4_WORD1_RAWDEV
268 | FATTR4_WORD1_SPACE_USED
269 | FATTR4_WORD1_TIME_ACCESS
270 | FATTR4_WORD1_TIME_METADATA
271 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 272 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 273};
274
bc4785cd 275static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 276 struct nfs4_readdir_arg *readdir)
277{
18fe6a23 278 unsigned int attrs = FATTR4_WORD0_FILEID | FATTR4_WORD0_TYPE;
0dbb4c67 279 __be32 *start, *p;
1da177e4 280
1da177e4 281 if (cookie > 2) {
b7ef1956 282 readdir->cookie = cookie;
1da177e4
LT		 283 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
284 return;
285 }
286
287 readdir->cookie = 0;
288 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
289 if (cookie == 2)
290 return;
291
292 /*
293 * NFSv4 servers do not return entries for '.' and '..'
294 * Therefore, we fake these entries here. We let '.'
295 * have cookie 0 and '..' have cookie 1. Note that
296 * when talking to the server, we always send cookie 0
297 * instead of 1 or 2.
298 */
2b86ce2d 299 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 300
301 if (cookie == 0) {
302 *p++ = xdr_one; /* next */
303 *p++ = xdr_zero; /* cookie, first word */
304 *p++ = xdr_one; /* cookie, second word */
305 *p++ = xdr_one; /* entry len */
306 memcpy(p, ".\0\0\0", 4); /* entry */
307 p++;
308 *p++ = xdr_one; /* bitmap length */
18fe6a23
AS		 309 *p++ = htonl(attrs); /* bitmap */
310 *p++ = htonl(12); /* attribute buffer length */
311 *p++ = htonl(NF4DIR);
2b0143b5 312 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
1da177e4
LT		 313 }
314
315 *p++ = xdr_one; /* next */
316 *p++ = xdr_zero; /* cookie, first word */
317 *p++ = xdr_two; /* cookie, second word */
318 *p++ = xdr_two; /* entry len */
319 memcpy(p, "..\0\0", 4); /* entry */
320 p++;
321 *p++ = xdr_one; /* bitmap length */
18fe6a23
AS		 322 *p++ = htonl(attrs); /* bitmap */
323 *p++ = htonl(12); /* attribute buffer length */
324 *p++ = htonl(NF4DIR);
2b0143b5 325 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
1da177e4
LT		 326
327 readdir->pgbase = (char *)p - (char *)start;
328 readdir->count -= readdir->pgbase;
2b86ce2d 329 kunmap_atomic(start);
1da177e4
LT		 330}
331
26d36301
TM		 332static void nfs4_test_and_free_stateid(struct nfs_server *server,
333 nfs4_stateid *stateid,
334 struct rpc_cred *cred)
335{
336 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops;
337
338 ops->test_and_free_expired(server, stateid, cred);
339}
340
341static void __nfs4_free_revoked_stateid(struct nfs_server *server,
342 nfs4_stateid *stateid,
343 struct rpc_cred *cred)
344{
345 stateid->type = NFS4_REVOKED_STATEID_TYPE;
346 nfs4_test_and_free_stateid(server, stateid, cred);
347}
348
349static void nfs4_free_revoked_stateid(struct nfs_server *server,
350 const nfs4_stateid *stateid,
351 struct rpc_cred *cred)
352{
353 nfs4_stateid tmp;
354
355 nfs4_stateid_copy(&tmp, stateid);
356 __nfs4_free_revoked_stateid(server, &tmp, cred);
357}
358
8478eaa1
N		 359static long nfs4_update_delay(long *timeout)
360{
361 long ret;
362 if (!timeout)
363 return NFS4_POLL_RETRY_MAX;
364 if (*timeout <= 0)
365 *timeout = NFS4_POLL_RETRY_MIN;
366 if (*timeout > NFS4_POLL_RETRY_MAX)
367 *timeout = NFS4_POLL_RETRY_MAX;
368 ret = *timeout;
369 *timeout <<= 1;
370 return ret;
371}
372
65de872e
TM		 373static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
374{
375 int res = 0;
376
377 might_sleep();
378
8478eaa1
N		 379 freezable_schedule_timeout_killable_unsafe(
380 nfs4_update_delay(timeout));
65de872e
TM		 381 if (fatal_signal_pending(current))
382 res = -ERESTARTSYS;
65de872e
TM		 383 return res;
384}
385
386/* This is the error handling routine for processes that are allowed
387 * to sleep.
388 */
b3c2aa07
TM		 389static int nfs4_do_handle_exception(struct nfs_server *server,
390 int errorcode, struct nfs4_exception *exception)
65de872e
TM		 391{
392 struct nfs_client *clp = server->nfs_client;
9e33bed5 393 struct nfs4_state *state = exception->state;
8487c479 394 const nfs4_stateid *stateid = exception->stateid;
3114ea7a 395 struct inode *inode = exception->inode;
65de872e
TM		 396 int ret = errorcode;
397
b3c2aa07
TM		 398 exception->delay = 0;
399 exception->recovering = 0;
65de872e 400 exception->retry = 0;
272289a3
TM		 401
402 if (stateid == NULL && state != NULL)
403 stateid = &state->stateid;
404
65de872e
TM		 405 switch(errorcode) {
406 case 0:
407 return 0;
5ba12443
TM		 408 case -NFS4ERR_DELEG_REVOKED:
409 case -NFS4ERR_ADMIN_REVOKED:
272289a3 410 case -NFS4ERR_EXPIRED:
5ba12443 411 case -NFS4ERR_BAD_STATEID:
272289a3
TM		 412 if (inode != NULL && stateid != NULL) {
413 nfs_inode_find_state_and_recover(inode,
414 stateid);
415 goto wait_on_recovery;
416 }
417 case -NFS4ERR_OPENMODE:
8487c479
TM		 418 if (inode) {
419 int err;
420
421 err = nfs_async_inode_return_delegation(inode,
422 stateid);
423 if (err == 0)
424 goto wait_on_recovery;
425 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) {
426 exception->retry = 1;
427 break;
428 }
429 }
3114ea7a
TM		 430 if (state == NULL)
431 break;
5d422301
TM		 432 ret = nfs4_schedule_stateid_recovery(server, state);
433 if (ret < 0)
434 break;
3114ea7a 435 goto wait_on_recovery;
65de872e 436 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 437 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 438 nfs4_schedule_lease_recovery(clp);
439 goto wait_on_recovery;
519ae255
CL		 440 case -NFS4ERR_MOVED:
441 ret = nfs4_schedule_migration_recovery(server);
442 if (ret < 0)
443 break;
444 goto wait_on_recovery;
8ef2f8d4
CL		 445 case -NFS4ERR_LEASE_MOVED:
446 nfs4_schedule_lease_moved_recovery(clp);
447 goto wait_on_recovery;
03391693 448#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 449 case -NFS4ERR_BADSESSION:
450 case -NFS4ERR_BADSLOT:
451 case -NFS4ERR_BAD_HIGH_SLOT:
452 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
453 case -NFS4ERR_DEADSESSION:
454 case -NFS4ERR_SEQ_FALSE_RETRY:
455 case -NFS4ERR_SEQ_MISORDERED:
456 dprintk("%s ERROR: %d Reset session\n", __func__,
457 errorcode);
9f594791 458 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 459 goto wait_on_recovery;
03391693 460#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 461 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 462 if (exception->timeout > HZ) {
463 /* We have retried a decent amount, time to
464 * fail
465 */
466 ret = -EBUSY;
467 break;
468 }
65de872e 469 case -NFS4ERR_DELAY:
2598ed34
TM		 470 nfs_inc_server_stats(server, NFSIOS_DELAY);
471 case -NFS4ERR_GRACE:
e85d7ee4 472 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b 473 case -NFS4ERR_RECALLCONFLICT:
b3c2aa07
TM		 474 exception->delay = 1;
475 return 0;
476
a8a4ae3a 477 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 478 case -NFS4ERR_OLD_STATEID:
479 exception->retry = 1;
b064eca2
TM		 480 break;
481 case -NFS4ERR_BADOWNER:
482 /* The following works around a Linux server bug! */
483 case -NFS4ERR_BADNAME:
484 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
485 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
486 exception->retry = 1;
487 printk(KERN_WARNING "NFS: v4 server %s "
488 "does not accept raw "
489 "uid/gids. "
490 "Reenabling the idmapper.\n",
491 server->nfs_client->cl_hostname);
492 }
65de872e
TM		 493 }
494 /* We failed to handle the error */
495 return nfs4_map_errors(ret);
0400a6b0 496wait_on_recovery:
b3c2aa07
TM		 497 exception->recovering = 1;
498 return 0;
499}
500
501/* This is the error handling routine for processes that are allowed
502 * to sleep.
503 */
504int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
505{
506 struct nfs_client *clp = server->nfs_client;
507 int ret;
508
509 ret = nfs4_do_handle_exception(server, errorcode, exception);
510 if (exception->delay) {
511 ret = nfs4_delay(server->client, &exception->timeout);
512 goto out_retry;
513 }
514 if (exception->recovering) {
515 ret = nfs4_wait_clnt_recover(clp);
516 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
517 return -EIO;
518 goto out_retry;
519 }
520 return ret;
521out_retry:
a2c0b9e2
TM		 522 if (ret == 0)
523 exception->retry = 1;
524 return ret;
65de872e
TM		 525}
526
037fc980
TM		 527static int
528nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
529 int errorcode, struct nfs4_exception *exception)
530{
531 struct nfs_client *clp = server->nfs_client;
532 int ret;
533
534 ret = nfs4_do_handle_exception(server, errorcode, exception);
535 if (exception->delay) {
536 rpc_delay(task, nfs4_update_delay(&exception->timeout));
537 goto out_retry;
538 }
539 if (exception->recovering) {
540 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
541 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
542 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
543 goto out_retry;
544 }
519ae255 545 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
037fc980
TM		 546 ret = -EIO;
547 return ret;
548out_retry:
a2c0b9e2
TM		 549 if (ret == 0)
550 exception->retry = 1;
551 return ret;
65de872e
TM		 552}
553
037fc980
TM		 554static int
555nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
556 struct nfs4_state *state, long *timeout)
557{
558 struct nfs4_exception exception = {
559 .state = state,
560 };
561
562 if (task->tk_status >= 0)
563 return 0;
564 if (timeout)
565 exception.timeout = *timeout;
566 task->tk_status = nfs4_async_handle_exception(task, server,
567 task->tk_status,
568 &exception);
569 if (exception.delay && timeout)
570 *timeout = exception.timeout;
571 if (exception.retry)
572 return -EAGAIN;
573 return 0;
574}
575
a5250def
WAA		 576/*
577 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
578 * or 'false' otherwise.
579 */
580static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
581{
582 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
eeea5361 583 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P);
a5250def 584}
65de872e 585
452e9352 586static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 587{
1da177e4
LT		 588 spin_lock(&clp->cl_lock);
589 if (time_before(clp->cl_last_renewal,timestamp))
590 clp->cl_last_renewal = timestamp;
591 spin_unlock(&clp->cl_lock);
592}
593
452e9352
TM		 594static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
595{
be824167
TM		 596 struct nfs_client *clp = server->nfs_client;
597
598 if (!nfs4_has_session(clp))
599 do_renew_lease(clp, timestamp);
452e9352
TM		 600}
601
2a3eb2b9
CL		 602struct nfs4_call_sync_data {
603 const struct nfs_server *seq_server;
604 struct nfs4_sequence_args *seq_args;
605 struct nfs4_sequence_res *seq_res;
606};
607
be3a5d23
TM		 608void nfs4_init_sequence(struct nfs4_sequence_args *args,
609 struct nfs4_sequence_res *res, int cache_reply)
a9c92d6b
CL		 610{
611 args->sa_slot = NULL;
612 args->sa_cache_this = cache_reply;
613 args->sa_privileged = 0;
614
615 res->sr_slot = NULL;
616}
617
618static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
619{
620 args->sa_privileged = 1;
621}
622
2e80dbe7 623static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res)
3bd2384a
CL		 624{
625 struct nfs4_slot *slot = res->sr_slot;
626 struct nfs4_slot_table *tbl;
627
3bd2384a
CL		 628 tbl = slot->table;
629 spin_lock(&tbl->slot_tbl_lock);
630 if (!nfs41_wake_and_assign_slot(tbl, slot))
631 nfs4_free_slot(tbl, slot);
632 spin_unlock(&tbl->slot_tbl_lock);
633
634 res->sr_slot = NULL;
2e80dbe7
TM		 635}
636
637static int nfs40_sequence_done(struct rpc_task *task,
638 struct nfs4_sequence_res *res)
639{
640 if (res->sr_slot != NULL)
641 nfs40_sequence_free_slot(res);
3bd2384a
CL		 642 return 1;
643}
644
cccef3b9
AA		 645#if defined(CONFIG_NFS_V4_1)
646
d185a334 647static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 648{
e3725ec0 649 struct nfs4_session *session;
13615871 650 struct nfs4_slot_table *tbl;
a13ce7c6 651 struct nfs4_slot *slot = res->sr_slot;
c10e4498 652 bool send_new_highest_used_slotid = false;
13615871 653
a13ce7c6 654 tbl = slot->table;
e3725ec0 655 session = tbl->session;
ea028ac9 656
07e8dcbd
TM		 657 /* Bump the slot sequence number */
658 if (slot->seq_done)
659 slot->seq_nr++;
660 slot->seq_done = 0;
661
35dc1d74 662 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 663 /* Be nice to the server: try to ensure that the last transmitted
664 * value for highest_user_slotid <= target_highest_slotid
665 */
666 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
667 send_new_highest_used_slotid = true;
668
a13ce7c6 669 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 670 send_new_highest_used_slotid = false;
671 goto out_unlock;
672 }
a13ce7c6 673 nfs4_free_slot(tbl, slot);
c10e4498
TM		 674
675 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
676 send_new_highest_used_slotid = false;
b75ad4cd 677out_unlock:
35dc1d74 678 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 679 res->sr_slot = NULL;
c10e4498 680 if (send_new_highest_used_slotid)
3f10a6af 681 nfs41_notify_server(session->clp);
045d2a6d
TM		 682 if (waitqueue_active(&tbl->slot_waitq))
683 wake_up_all(&tbl->slot_waitq);
13615871
AA		 684}
685
2e80dbe7
TM		 686static int nfs41_sequence_process(struct rpc_task *task,
687 struct nfs4_sequence_res *res)
b0df806c 688{
e3725ec0 689 struct nfs4_session *session;
a13ce7c6 690 struct nfs4_slot *slot = res->sr_slot;
14516c3a 691 struct nfs_client *clp;
ac20d163 692 bool interrupted = false;
85563073 693 int ret = 1;
b0df806c 694
a13ce7c6
TM		 695 if (slot == NULL)
696 goto out_noaction;
468f8613
BS		 697 /* don't increment the sequence number if the task wasn't sent */
698 if (!RPC_WAS_SENT(task))
b0df806c
AA		 699 goto out;
700
e3725ec0 701 session = slot->table->session;
933602e3 702
ac20d163 703 if (slot->interrupted) {
88bd4f86
OK		 704 if (res->sr_status != -NFS4ERR_DELAY)
705 slot->interrupted = 0;
ac20d163
TM		 706 interrupted = true;
707 }
708
2f92ae34 709 trace_nfs4_sequence_done(session, res);
691daf3b 710 /* Check the SEQUENCE operation status */
14516c3a
TM		 711 switch (res->sr_status) {
712 case 0:
a865880e
OK		 713 /* If previous op on slot was interrupted and we reused
714 * the seq# and got a reply from the cache, then retry
715 */
716 if (task->tk_status == -EREMOTEIO && interrupted) {
717 ++slot->seq_nr;
718 goto retry_nowait;
719 }
b0df806c 720 /* Update the slot's sequence and clientid lease timer */
07e8dcbd 721 slot->seq_done = 1;
e3725ec0 722 clp = session->clp;
8e63b6a8 723 do_renew_lease(clp, res->sr_timestamp);
0629e370 724 /* Check sequence flags */
0a014a44
TM		 725 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags,
726 !!slot->privileged);
464ee9f9 727 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 728 break;
ac20d163
TM		 729 case 1:
730 /*
731 * sr_status remains 1 if an RPC level error occurred.
732 * The server may or may not have processed the sequence
733 * operation..
734 * Mark the slot as having hosted an interrupted RPC call.
735 */
736 slot->interrupted = 1;
737 goto out;
14516c3a
TM		 738 case -NFS4ERR_DELAY:
739 /* The server detected a resend of the RPC call and
740 * returned NFS4ERR_DELAY as per Section 2.10.6.2
741 * of RFC5661.
742 */
df2fabff 743 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 744 __func__,
df2fabff 745 slot->slot_nr,
933602e3 746 slot->seq_nr);
14516c3a 747 goto out_retry;
85563073
TM		 748 case -NFS4ERR_BADSLOT:
749 /*
750 * The slot id we used was probably retired. Try again
751 * using a different slot id.
752 */
e8794440
TM		 753 goto retry_nowait;
754 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 755 /*
756 * Was the last operation on this sequence interrupted?
757 * If so, retry after bumping the sequence number.
758 */
759 if (interrupted) {
760 ++slot->seq_nr;
761 goto retry_nowait;
762 }
e8794440
TM		 763 /*
764 * Could this slot have been previously retired?
765 * If so, then the server may be expecting seq_nr = 1!
766 */
8e63b6a8
TM		 767 if (slot->seq_nr != 1) {
768 slot->seq_nr = 1;
769 goto retry_nowait;
770 }
771 break;
e8794440
TM		 772 case -NFS4ERR_SEQ_FALSE_RETRY:
773 ++slot->seq_nr;
774 goto retry_nowait;
14516c3a
TM		 775 default:
776 /* Just update the slot sequence no. */
07e8dcbd 777 slot->seq_done = 1;
b0df806c
AA		 778 }
779out:
780 /* The session may be reset by one of the error handlers. */
781 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
a13ce7c6 782out_noaction:
85563073 783 return ret;
e8794440
TM		 784retry_nowait:
785 if (rpc_restart_call_prepare(task)) {
2e80dbe7 786 nfs41_sequence_free_slot(res);
e8794440
TM		 787 task->tk_status = 0;
788 ret = 0;
789 }
790 goto out;
14516c3a 791out_retry:
d05dd4e9 792 if (!rpc_restart_call(task))
14516c3a
TM		 793 goto out;
794 rpc_delay(task, NFS4_POLL_RETRY_MAX);
795 return 0;
b0df806c 796}
2e80dbe7
TM		 797
798int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
799{
800 if (!nfs41_sequence_process(task, res))
801 return 0;
802 if (res->sr_slot != NULL)
803 nfs41_sequence_free_slot(res);
804 return 1;
805
806}
f9c96fcc 807EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 808
2e80dbe7
TM		 809static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
810{
811 if (res->sr_slot == NULL)
812 return 1;
813 if (res->sr_slot->table->session != NULL)
814 return nfs41_sequence_process(task, res);
815 return nfs40_sequence_done(task, res);
816}
817
818static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
819{
820 if (res->sr_slot != NULL) {
821 if (res->sr_slot->table->session != NULL)
822 nfs41_sequence_free_slot(res);
823 else
824 nfs40_sequence_free_slot(res);
825 }
826}
827
2c4b131d 828int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 829{
e3725ec0 830 if (res->sr_slot == NULL)
14516c3a 831 return 1;
3bd2384a
CL		 832 if (!res->sr_slot->table->session)
833 return nfs40_sequence_done(task, res);
14516c3a 834 return nfs41_sequence_done(task, res);
df896455 835}
2c4b131d 836EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 837
ce5039c1
AA		 838static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
839{
2a3eb2b9 840 struct nfs4_call_sync_data *data = calldata;
ce5039c1 841
035168ab
TM		 842 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
843
7981c8a6
AS		 844 nfs4_setup_sequence(data->seq_server->nfs_client,
845 data->seq_args, data->seq_res, task);
ce5039c1
AA		 846}
847
69ab40c4
AA		 848static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
849{
2a3eb2b9 850 struct nfs4_call_sync_data *data = calldata;
69ab40c4 851
14516c3a 852 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 853}
854
17280175 855static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 856 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 857 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 858};
859
3bd2384a
CL		 860#else /* !CONFIG_NFS_V4_1 */
861
2e80dbe7
TM		 862static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
863{
864 return nfs40_sequence_done(task, res);
865}
866
867static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
868{
869 if (res->sr_slot != NULL)
870 nfs40_sequence_free_slot(res);
871}
872
2c4b131d
PT		 873int nfs4_sequence_done(struct rpc_task *task,
874 struct nfs4_sequence_res *res)
9915ea7e 875{
3bd2384a 876 return nfs40_sequence_done(task, res);
9915ea7e 877}
2c4b131d 878EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 879
880#endif /* !CONFIG_NFS_V4_1 */
9915ea7e 881
7981c8a6
AS		 882int nfs4_setup_sequence(const struct nfs_client *client,
883 struct nfs4_sequence_args *args,
884 struct nfs4_sequence_res *res,
885 struct rpc_task *task)
886{
7981c8a6 887 struct nfs4_session *session = nfs4_get_session(client);
76ee0354 888 struct nfs4_slot_table *tbl = client->cl_slot_tbl;
3d35808b 889 struct nfs4_slot *slot;
7981c8a6 890
9dd9107f
AS		 891 /* slot already allocated? */
892 if (res->sr_slot != NULL)
893 goto out_start;
894
76ee0354
AS		 895 if (session) {
896 tbl = &session->fc_slot_table;
897 task->tk_timeout = 0;
898 }
899
6994cdd7 900 spin_lock(&tbl->slot_tbl_lock);
76ee0354
AS		 901 /* The state manager will wait until the slot table is empty */
902 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
903 goto out_sleep;
6994cdd7 904
3d35808b
AS		 905 slot = nfs4_alloc_slot(tbl);
906 if (IS_ERR(slot)) {
907 /* Try again in 1/4 second */
908 if (slot == ERR_PTR(-ENOMEM))
909 task->tk_timeout = HZ >> 2;
0dcee8bb 910 goto out_sleep;
3d35808b 911 }
6994cdd7 912 spin_unlock(&tbl->slot_tbl_lock);
7981c8a6 913
3d35808b
AS		 914 slot->privileged = args->sa_privileged ? 1 : 0;
915 args->sa_slot = slot;
916
917 res->sr_slot = slot;
918 if (session) {
919 res->sr_timestamp = jiffies;
920 res->sr_status_flags = 0;
921 res->sr_status = 1;
3d35808b
AS		 922 }
923
ad05cc0f 924 trace_nfs4_setup_sequence(session, args);
9dd9107f
AS		 925out_start:
926 rpc_call_start(task);
927 return 0;
0dcee8bb
AS		 928
929out_sleep:
930 if (args->sa_privileged)
931 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
932 NULL, RPC_PRIORITY_PRIVILEGED);
933 else
934 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
935 spin_unlock(&tbl->slot_tbl_lock);
936 return -EAGAIN;
7981c8a6
AS		 937}
938EXPORT_SYMBOL_GPL(nfs4_setup_sequence);
939
9915ea7e
CL		 940static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
941{
942 struct nfs4_call_sync_data *data = calldata;
42e1cca7 943 nfs4_setup_sequence(data->seq_server->nfs_client,
9915ea7e
CL		 944 data->seq_args, data->seq_res, task);
945}
946
947static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
948{
949 struct nfs4_call_sync_data *data = calldata;
950 nfs4_sequence_done(task, data->seq_res);
951}
952
953static const struct rpc_call_ops nfs40_call_sync_ops = {
954 .rpc_call_prepare = nfs40_call_sync_prepare,
955 .rpc_call_done = nfs40_call_sync_done,
956};
957
7c513058
BS		 958static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
959 struct nfs_server *server,
ce5039c1
AA		 960 struct rpc_message *msg,
961 struct nfs4_sequence_args *args,
8fe72bac 962 struct nfs4_sequence_res *res)
ce5039c1
AA		 963{
964 int ret;
965 struct rpc_task *task;
9915ea7e 966 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 967 struct nfs4_call_sync_data data = {
035168ab 968 .seq_server = server,
ce5039c1
AA		 969 .seq_args = args,
970 .seq_res = res,
ce5039c1
AA		 971 };
972 struct rpc_task_setup task_setup = {
7c513058 973 .rpc_client = clnt,
ce5039c1 974 .rpc_message = msg,
9915ea7e 975 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 976 .callback_data = &data
977 };
978
ce5039c1
AA		 979 task = rpc_run_task(&task_setup);
980 if (IS_ERR(task))
981 ret = PTR_ERR(task);
982 else {
983 ret = task->tk_status;
984 rpc_put_task(task);
985 }
986 return ret;
987}
988
7c513058
BS		 989int nfs4_call_sync(struct rpc_clnt *clnt,
990 struct nfs_server *server,
e73b83f2
BS		 991 struct rpc_message *msg,
992 struct nfs4_sequence_args *args,
993 struct nfs4_sequence_res *res,
994 int cache_reply)
995{
a9c92d6b 996 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 997 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 998}
cccef3b9 999
d3129ef6
TM		 1000static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo,
1001 unsigned long timestamp)
1da177e4 1002{
38478b24 1003 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 1004
38478b24 1005 spin_lock(&dir->i_lock);
359d7d1c 1006 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
e603a4c1
TM		 1007 if (cinfo->atomic && cinfo->before == dir->i_version) {
1008 nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE;
1009 nfsi->attrtimeo_timestamp = jiffies;
1010 } else {
bfc69a45 1011 nfs_force_lookup_revalidate(dir);
e603a4c1
TM		 1012 if (cinfo->before != dir->i_version)
1013 nfsi->cache_validity |= NFS_INO_INVALID_ACCESS |
1014 NFS_INO_INVALID_ACL;
1015 }
a9a4a87a 1016 dir->i_version = cinfo->after;
d3129ef6 1017 nfsi->read_cache_jiffies = timestamp;
3235b403 1018 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
de242c0b 1019 nfs_fscache_invalidate(dir);
38478b24 1020 spin_unlock(&dir->i_lock);
1da177e4
LT		 1021}
1022
e56e0b78 1023struct nfs4_opendata {
c6d00e63 1024 struct kref kref;
e56e0b78
TM		 1025 struct nfs_openargs o_arg;
1026 struct nfs_openres o_res;
cdd4e68b
TM		 1027 struct nfs_open_confirmargs c_arg;
1028 struct nfs_open_confirmres c_res;
6926afd1
TM		 1029 struct nfs4_string owner_name;
1030 struct nfs4_string group_name;
a49c2691 1031 struct nfs4_label *a_label;
e56e0b78 1032 struct nfs_fattr f_attr;
1775fd3e 1033 struct nfs4_label *f_label;
e56e0b78 1034 struct dentry *dir;
82a2c1b7 1035 struct dentry *dentry;
e56e0b78 1036 struct nfs4_state_owner *owner;
aac00a8d 1037 struct nfs4_state *state;
e56e0b78 1038 struct iattr attrs;
26e976a8 1039 unsigned long timestamp;
a7a3b1e9
BC		 1040 bool rpc_done;
1041 bool file_created;
1042 bool is_recover;
1043 bool cancelled;
24ac23ab 1044 int rpc_status;
e56e0b78
TM		 1045};
1046
49f9a0fa
TM		 1047static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1048 int err, struct nfs4_exception *exception)
1049{
1050 if (err != -EINVAL)
1051 return false;
1052 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1053 return false;
1054 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1055 exception->retry = 1;
1056 return true;
1057}
1058
6ae37339
TM		 1059static u32
1060nfs4_map_atomic_open_share(struct nfs_server *server,
1061 fmode_t fmode, int openflags)
1062{
1063 u32 res = 0;
1064
1065 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1066 case FMODE_READ:
1067 res = NFS4_SHARE_ACCESS_READ;
1068 break;
1069 case FMODE_WRITE:
1070 res = NFS4_SHARE_ACCESS_WRITE;
1071 break;
1072 case FMODE_READ|FMODE_WRITE:
1073 res = NFS4_SHARE_ACCESS_BOTH;
1074 }
1075 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1076 goto out;
1077 /* Want no delegation if we're using O_DIRECT */
1078 if (openflags & O_DIRECT)
1079 res |= NFS4_SHARE_WANT_NO_DELEG;
1080out:
1081 return res;
1082}
1083
49f9a0fa
TM		 1084static enum open_claim_type4
1085nfs4_map_atomic_open_claim(struct nfs_server *server,
1086 enum open_claim_type4 claim)
1087{
1088 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1089 return claim;
1090 switch (claim) {
1091 default:
1092 return claim;
1093 case NFS4_OPEN_CLAIM_FH:
1094 return NFS4_OPEN_CLAIM_NULL;
1095 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1096 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1097 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1098 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1099 }
1100}
2ced46c2
TM		 1101
1102static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1103{
1104 p->o_res.f_attr = &p->f_attr;
1775fd3e 1105 p->o_res.f_label = p->f_label;
c1d51931
TM		 1106 p->o_res.seqid = p->o_arg.seqid;
1107 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 1108 p->o_res.server = p->o_arg.server;
5f657530 1109 p->o_res.access_request = p->o_arg.access;
2ced46c2 1110 nfs_fattr_init(&p->f_attr);
6926afd1 1111 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 1112}
1113
82a2c1b7 1114static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 1115 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 1116 const struct iattr *attrs,
1775fd3e 1117 struct nfs4_label *label,
4a1c0893 1118 enum open_claim_type4 claim,
8535b2be 1119 gfp_t gfp_mask)
e56e0b78 1120{
82a2c1b7 1121 struct dentry *parent = dget_parent(dentry);
2b0143b5 1122 struct inode *dir = d_inode(parent);
e56e0b78 1123 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1124 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 1125 struct nfs4_opendata *p;
1126
8535b2be 1127 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1128 if (p == NULL)
1129 goto err;
14c43f76
DQ		 1130
1131 p->f_label = nfs4_label_alloc(server, gfp_mask);
1132 if (IS_ERR(p->f_label))
1133 goto err_free_p;
1134
a49c2691
KM		 1135 p->a_label = nfs4_label_alloc(server, gfp_mask);
1136 if (IS_ERR(p->a_label))
1137 goto err_free_f;
1138
63f5f796
TM		 1139 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1140 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1141 if (IS_ERR(p->o_arg.seqid))
14c43f76 1142 goto err_free_label;
82a2c1b7
AV		 1143 nfs_sb_active(dentry->d_sb);
1144 p->dentry = dget(dentry);
e56e0b78
TM		 1145 p->dir = parent;
1146 p->owner = sp;
1147 atomic_inc(&sp->so_count);
dc0b027d
TM		 1148 p->o_arg.open_flags = flags;
1149 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
dff25ddb 1150 p->o_arg.umask = current_umask();
536585cc 1151 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
6ae37339
TM		 1152 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1153 fmode, flags);
ae2bb032
WAA		 1154 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1155 * will return permission denied for all bits until close */
1156 if (!(flags & O_EXCL)) {
1157 /* ask server to check for all possible rights as results
1158 * are cached */
536585cc
TM		 1159 switch (p->o_arg.claim) {
1160 default:
1161 break;
1162 case NFS4_OPEN_CLAIM_NULL:
1163 case NFS4_OPEN_CLAIM_FH:
1164 p->o_arg.access = NFS4_ACCESS_READ |
1165 NFS4_ACCESS_MODIFY |
1166 NFS4_ACCESS_EXTEND |
1167 NFS4_ACCESS_EXECUTE;
1168 }
ae2bb032 1169 }
7539bbab 1170 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1171 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1172 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1173 p->o_arg.name = &dentry->d_name;
e56e0b78 1174 p->o_arg.server = server;
aa9c2669 1175 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1176 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
a49c2691 1177 p->o_arg.label = nfs4_label_copy(p->a_label, label);
49f9a0fa 1178 switch (p->o_arg.claim) {
4a1c0893
TM		 1179 case NFS4_OPEN_CLAIM_NULL:
1180 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1181 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1182 p->o_arg.fh = NFS_FH(dir);
1183 break;
1184 case NFS4_OPEN_CLAIM_PREVIOUS:
1185 case NFS4_OPEN_CLAIM_FH:
1186 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1187 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1188 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1189 }
536e43d1 1190 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1191 __u32 verf[2];
d77d76ff 1192
e56e0b78
TM		 1193 p->o_arg.u.attrs = &p->attrs;
1194 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1195
1196 verf[0] = jiffies;
1197 verf[1] = current->pid;
1198 memcpy(p->o_arg.u.verifier.data, verf,
1199 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1200 }
cdd4e68b
TM		 1201 p->c_arg.fh = &p->o_res.fh;
1202 p->c_arg.stateid = &p->o_res.stateid;
1203 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1204 nfs4_init_opendata_res(p);
c6d00e63 1205 kref_init(&p->kref);
e56e0b78 1206 return p;
14c43f76
DQ		 1207
1208err_free_label:
a49c2691
KM		 1209 nfs4_label_free(p->a_label);
1210err_free_f:
14c43f76
DQ		 1211 nfs4_label_free(p->f_label);
1212err_free_p:
e56e0b78
TM		 1213 kfree(p);
1214err:
1215 dput(parent);
1216 return NULL;
1217}
1218
c6d00e63 1219static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1220{
c6d00e63
TM		 1221 struct nfs4_opendata *p = container_of(kref,
1222 struct nfs4_opendata, kref);
82a2c1b7 1223 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1224
1225 nfs_free_seqid(p->o_arg.seqid);
2e80dbe7 1226 nfs4_sequence_free_slot(&p->o_res.seq_res);
aac00a8d
TM		 1227 if (p->state != NULL)
1228 nfs4_put_open_state(p->state);
c6d00e63 1229 nfs4_put_state_owner(p->owner);
14c43f76 1230
a49c2691 1231 nfs4_label_free(p->a_label);
14c43f76
DQ		 1232 nfs4_label_free(p->f_label);
1233
c6d00e63 1234 dput(p->dir);
82a2c1b7
AV		 1235 dput(p->dentry);
1236 nfs_sb_deactive(sb);
6926afd1 1237 nfs_fattr_free_names(&p->f_attr);
e911b815 1238 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1239 kfree(p);
1240}
1241
1242static void nfs4_opendata_put(struct nfs4_opendata *p)
1243{
1244 if (p != NULL)
1245 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1246}
1247
24311f88
TM		 1248static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1249 fmode_t fmode)
1250{
1251 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1252 case FMODE_READ|FMODE_WRITE:
1253 return state->n_rdwr != 0;
1254 case FMODE_WRITE:
1255 return state->n_wronly != 0;
1256 case FMODE_READ:
1257 return state->n_rdonly != 0;
1258 }
1259 WARN_ON_ONCE(1);
1260 return false;
1261}
1262
dc0b027d 1263static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1264{
1265 int ret = 0;
dc0b027d 1266
536e43d1 1267 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1268 goto out;
1269 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1270 case FMODE_READ:
88069f77
TM		 1271 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1272 && state->n_rdonly != 0;
6ee41268
TM		 1273 break;
1274 case FMODE_WRITE:
88069f77
TM		 1275 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1276 && state->n_wronly != 0;
6ee41268
TM		 1277 break;
1278 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1279 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1280 && state->n_rdwr != 0;
6ee41268 1281 }
dc0b027d 1282out:
6ee41268
TM		 1283 return ret;
1284}
1285
2a606188
TM		 1286static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1287 enum open_claim_type4 claim)
aac00a8d 1288{
652f89f6
TM		 1289 if (delegation == NULL)
1290 return 0;
dc0b027d 1291 if ((delegation->type & fmode) != fmode)
aac00a8d 1292 return 0;
d25be546
TM		 1293 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1294 return 0;
2a606188
TM		 1295 switch (claim) {
1296 case NFS4_OPEN_CLAIM_NULL:
1297 case NFS4_OPEN_CLAIM_FH:
1298 break;
1299 case NFS4_OPEN_CLAIM_PREVIOUS:
1300 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1301 break;
1302 default:
1303 return 0;
1304 }
b7391f44 1305 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1306 return 1;
1307}
1308
dc0b027d 1309static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1310{
dc0b027d 1311 switch (fmode) {
e7616923
TM		 1312 case FMODE_WRITE:
1313 state->n_wronly++;
1314 break;
1315 case FMODE_READ:
1316 state->n_rdonly++;
1317 break;
1318 case FMODE_READ|FMODE_WRITE:
1319 state->n_rdwr++;
1320 }
dc0b027d 1321 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1322}
1323
8a64c4ef
TM		 1324#ifdef CONFIG_NFS_V4_1
1325static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state)
1326{
1327 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags))
1328 return true;
1329 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags))
1330 return true;
1331 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags))
1332 return true;
1333 return false;
1334}
1335#endif /* CONFIG_NFS_V4_1 */
1336
4f14c194
TM		 1337static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1338{
1339 struct nfs_client *clp = state->owner->so_server->nfs_client;
1340 bool need_recover = false;
1341
1342 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1343 need_recover = true;
1344 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1345 need_recover = true;
1346 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1347 need_recover = true;
1348 if (need_recover)
1349 nfs4_state_mark_reclaim_nograce(clp, state);
1350}
1351
e999e80e 1352static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1393d961 1353 const nfs4_stateid *stateid, nfs4_stateid *freeme)
e999e80e
TM		 1354{
1355 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1356 return true;
4f14c194 1357 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1393d961 1358 nfs4_stateid_copy(freeme, &state->open_stateid);
4f14c194 1359 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1360 return true;
4f14c194 1361 }
e999e80e
TM		 1362 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1363 return true;
1364 return false;
1365}
1366
f95549cf
TM		 1367static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1368{
3c38cbe2
TM		 1369 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1370 return;
f95549cf
TM		 1371 if (state->n_wronly)
1372 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1373 if (state->n_rdonly)
1374 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1375 if (state->n_rdwr)
1376 set_bit(NFS_O_RDWR_STATE, &state->flags);
3c38cbe2 1377 set_bit(NFS_OPEN_STATE, &state->flags);
f95549cf
TM		 1378}
1379
226056c5
TM		 1380static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1381 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1382{
226056c5
TM		 1383 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1384 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1385 case FMODE_WRITE:
1386 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1387 break;
1388 case FMODE_READ:
1389 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1390 break;
1391 case 0:
1392 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1393 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1394 clear_bit(NFS_OPEN_STATE, &state->flags);
1395 }
1396 if (stateid == NULL)
1397 return;
3e7dfb16
TM		 1398 /* Handle OPEN+OPEN_DOWNGRADE races */
1399 if (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1400 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
f95549cf 1401 nfs_resync_open_stateid_locked(state);
226056c5 1402 return;
f95549cf 1403 }
003707c7 1404 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1405 nfs4_stateid_copy(&state->stateid, stateid);
1406 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1407}
1408
4a1e2feb
TM		 1409static void nfs_clear_open_stateid(struct nfs4_state *state,
1410 nfs4_stateid *arg_stateid,
1411 nfs4_stateid *stateid, fmode_t fmode)
226056c5
TM		 1412{
1413 write_seqlock(&state->seqlock);
3e7dfb16
TM		 1414 /* Ignore, if the CLOSE argment doesn't match the current stateid */
1415 if (nfs4_state_match_open_stateid_other(state, arg_stateid))
1416 nfs_clear_open_stateid_locked(state, stateid, fmode);
226056c5 1417 write_sequnlock(&state->seqlock);
4f14c194
TM		 1418 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1419 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1420}
1421
1393d961
TM		 1422static void nfs_set_open_stateid_locked(struct nfs4_state *state,
1423 const nfs4_stateid *stateid, fmode_t fmode,
1424 nfs4_stateid *freeme)
003707c7 1425{
dc0b027d 1426 switch (fmode) {
003707c7
TM		 1427 case FMODE_READ:
1428 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1429 break;
1430 case FMODE_WRITE:
1431 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1432 break;
1433 case FMODE_READ|FMODE_WRITE:
1434 set_bit(NFS_O_RDWR_STATE, &state->flags);
1435 }
1393d961 1436 if (!nfs_need_update_open_stateid(state, stateid, freeme))
e999e80e
TM		 1437 return;
1438 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1439 nfs4_stateid_copy(&state->stateid, stateid);
1440 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1441}
1442
1393d961
TM		 1443static void __update_open_stateid(struct nfs4_state *state,
1444 const nfs4_stateid *open_stateid,
1445 const nfs4_stateid *deleg_stateid,
1446 fmode_t fmode,
1447 nfs4_stateid *freeme)
1da177e4 1448{
8bda4e4c
TM		 1449 /*
1450 * Protect the call to nfs4_state_set_mode_locked and
1451 * serialise the stateid update
1452 */
361cad3c 1453 spin_lock(&state->owner->so_lock);
8bda4e4c 1454 write_seqlock(&state->seqlock);
003707c7 1455 if (deleg_stateid != NULL) {
f597c537 1456 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1457 set_bit(NFS_DELEGATED_STATE, &state->flags);
1458 }
1459 if (open_stateid != NULL)
1393d961 1460 nfs_set_open_stateid_locked(state, open_stateid, fmode, freeme);
8bda4e4c 1461 write_sequnlock(&state->seqlock);
dc0b027d 1462 update_open_stateflags(state, fmode);
ec073428 1463 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1464}
1465
1393d961
TM		 1466static int update_open_stateid(struct nfs4_state *state,
1467 const nfs4_stateid *open_stateid,
1468 const nfs4_stateid *delegation,
1469 fmode_t fmode)
34310430 1470{
1393d961
TM		 1471 struct nfs_server *server = NFS_SERVER(state->inode);
1472 struct nfs_client *clp = server->nfs_client;
34310430
TM		 1473 struct nfs_inode *nfsi = NFS_I(state->inode);
1474 struct nfs_delegation *deleg_cur;
83aa3e0f 1475 nfs4_stateid freeme = { };
34310430
TM		 1476 int ret = 0;
1477
dc0b027d 1478 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1479
1480 rcu_read_lock();
1481 deleg_cur = rcu_dereference(nfsi->delegation);
1482 if (deleg_cur == NULL)
1483 goto no_delegation;
1484
1485 spin_lock(&deleg_cur->lock);
17f26b12 1486 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1487 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1488 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1489 goto no_delegation_unlock;
1490
1491 if (delegation == NULL)
1492 delegation = &deleg_cur->stateid;
f597c537 1493 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1494 goto no_delegation_unlock;
1495
b7391f44 1496 nfs_mark_delegation_referenced(deleg_cur);
1393d961
TM		 1497 __update_open_stateid(state, open_stateid, &deleg_cur->stateid,
1498 fmode, &freeme);
34310430
TM		 1499 ret = 1;
1500no_delegation_unlock:
1501 spin_unlock(&deleg_cur->lock);
1502no_delegation:
1503 rcu_read_unlock();
1504
1505 if (!ret && open_stateid != NULL) {
1393d961 1506 __update_open_stateid(state, open_stateid, NULL, fmode, &freeme);
34310430
TM		 1507 ret = 1;
1508 }
4f14c194 1509 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1393d961
TM		 1510 nfs4_schedule_state_manager(clp);
1511 if (freeme.type != 0)
1512 nfs4_test_and_free_stateid(server, &freeme,
1513 state->owner->so_cred);
34310430
TM		 1514
1515 return ret;
1516}
1517
39071e6f
TM		 1518static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1519 const nfs4_stateid *stateid)
1520{
1521 struct nfs4_state *state = lsp->ls_state;
1522 bool ret = false;
1523
1524 spin_lock(&state->state_lock);
1525 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1526 goto out_noupdate;
1527 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1528 goto out_noupdate;
1529 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1530 ret = true;
1531out_noupdate:
1532 spin_unlock(&state->state_lock);
1533 return ret;
1534}
34310430 1535
dc0b027d 1536static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1537{
1538 struct nfs_delegation *delegation;
1539
1540 rcu_read_lock();
1541 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1542 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1543 rcu_read_unlock();
1544 return;
1545 }
1546 rcu_read_unlock();
57ec14c5 1547 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1548}
1549
6ee41268 1550static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1551{
1552 struct nfs4_state *state = opendata->state;
1553 struct nfs_inode *nfsi = NFS_I(state->inode);
1554 struct nfs_delegation *delegation;
f448badd 1555 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1556 fmode_t fmode = opendata->o_arg.fmode;
2a606188 1557 enum open_claim_type4 claim = opendata->o_arg.claim;
aac00a8d
TM		 1558 nfs4_stateid stateid;
1559 int ret = -EAGAIN;
1560
aac00a8d 1561 for (;;) {
61beef75 1562 spin_lock(&state->owner->so_lock);
dc0b027d 1563 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1564 update_open_stateflags(state, fmode);
6ee41268 1565 spin_unlock(&state->owner->so_lock);
61beef75 1566 goto out_return_state;
6ee41268 1567 }
61beef75 1568 spin_unlock(&state->owner->so_lock);
34310430
TM		 1569 rcu_read_lock();
1570 delegation = rcu_dereference(nfsi->delegation);
2a606188 1571 if (!can_open_delegated(delegation, fmode, claim)) {
34310430 1572 rcu_read_unlock();
aac00a8d 1573 break;
34310430 1574 }
aac00a8d 1575 /* Save the delegation */
f597c537 1576 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1577 rcu_read_unlock();
fa332941 1578 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1579 if (!opendata->is_recover) {
1580 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1581 if (ret != 0)
1582 goto out;
1583 }
aac00a8d 1584 ret = -EAGAIN;
34310430
TM		 1585
1586 /* Try to update the stateid using the delegation */
dc0b027d 1587 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1588 goto out_return_state;
aac00a8d 1589 }
aac00a8d
TM		 1590out:
1591 return ERR_PTR(ret);
1592out_return_state:
1593 atomic_inc(&state->count);
1594 return state;
1595}
1596
e23008ec
AA		 1597static void
1598nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1599{
1600 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1601 struct nfs_delegation *delegation;
1602 int delegation_flags = 0;
1603
1604 rcu_read_lock();
1605 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1606 if (delegation)
1607 delegation_flags = delegation->flags;
1608 rcu_read_unlock();
72d79ff8
TM		 1609 switch (data->o_arg.claim) {
1610 default:
1611 break;
1612 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1613 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
e23008ec
AA		 1614 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1615 "returning a delegation for "
1616 "OPEN(CLAIM_DELEGATE_CUR)\n",
1617 clp->cl_hostname);
72d79ff8
TM		 1618 return;
1619 }
1620 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
e23008ec
AA		 1621 nfs_inode_set_delegation(state->inode,
1622 data->owner->so_cred,
1623 &data->o_res);
1624 else
1625 nfs_inode_reclaim_delegation(state->inode,
1626 data->owner->so_cred,
1627 &data->o_res);
1628}
1629
1630/*
1631 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1632 * and update the nfs4_state.
1633 */
1634static struct nfs4_state *
1635_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1636{
1637 struct inode *inode = data->state->inode;
1638 struct nfs4_state *state = data->state;
1639 int ret;
1640
d2bfda2e 1641 if (!data->rpc_done) {
37a8484a
AS		 1642 if (data->rpc_status)
1643 return ERR_PTR(data->rpc_status);
d2bfda2e
WAA		 1644 /* cached opens have already been processed */
1645 goto update;
e23008ec
AA		 1646 }
1647
e23008ec
AA		 1648 ret = nfs_refresh_inode(inode, &data->f_attr);
1649 if (ret)
37a8484a 1650 return ERR_PTR(ret);
e23008ec
AA		 1651
1652 if (data->o_res.delegation_type != 0)
1653 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1654update:
e23008ec
AA		 1655 update_open_stateid(state, &data->o_res.stateid, NULL,
1656 data->o_arg.fmode);
d49f042a 1657 atomic_inc(&state->count);
e23008ec
AA		 1658
1659 return state;
e23008ec
AA		 1660}
1661
4e2fcac7
TM		 1662static struct inode *
1663nfs4_opendata_get_inode(struct nfs4_opendata *data)
1664{
1665 struct inode *inode;
1666
1667 switch (data->o_arg.claim) {
1668 case NFS4_OPEN_CLAIM_NULL:
1669 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1670 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1671 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1672 return ERR_PTR(-EAGAIN);
1673 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh,
1674 &data->f_attr, data->f_label);
1675 break;
1676 default:
1677 inode = d_inode(data->dentry);
1678 ihold(inode);
1679 nfs_refresh_inode(inode, &data->f_attr);
1680 }
1681 return inode;
1682}
1683
e23008ec 1684static struct nfs4_state *
75e8c48b 1685nfs4_opendata_find_nfs4_state(struct nfs4_opendata *data)
24ac23ab 1686{
75e8c48b 1687 struct nfs4_state *state;
24ac23ab 1688 struct inode *inode;
75e8c48b
TM		 1689
1690 inode = nfs4_opendata_get_inode(data);
1691 if (IS_ERR(inode))
1692 return ERR_CAST(inode);
1693 if (data->state != NULL && data->state->inode == inode) {
1694 state = data->state;
1695 atomic_inc(&state->count);
1696 } else
1697 state = nfs4_get_open_state(inode, data->owner);
1698 iput(inode);
1699 if (state == NULL)
1700 state = ERR_PTR(-ENOMEM);
1701 return state;
1702}
1703
1704static struct nfs4_state *
1705_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1706{
1707 struct nfs4_state *state;
24ac23ab 1708
aac00a8d 1709 if (!data->rpc_done) {
6ee41268 1710 state = nfs4_try_open_cached(data);
9759b0fb 1711 trace_nfs4_cached_open(data->state);
aac00a8d
TM		 1712 goto out;
1713 }
1714
75e8c48b
TM		 1715 state = nfs4_opendata_find_nfs4_state(data);
1716 if (IS_ERR(state))
1717 goto out;
1718
e23008ec
AA		 1719 if (data->o_res.delegation_type != 0)
1720 nfs4_opendata_check_deleg(data, state);
34310430 1721 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1722 data->o_arg.fmode);
aac00a8d 1723out:
7aa262b5 1724 nfs_release_seqid(data->o_arg.seqid);
24ac23ab
TM		 1725 return state;
1726}
1727
e23008ec
AA		 1728static struct nfs4_state *
1729nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1730{
2e80dbe7
TM		 1731 struct nfs4_state *ret;
1732
e23008ec 1733 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
2e80dbe7
TM		 1734 ret =_nfs4_opendata_reclaim_to_nfs4_state(data);
1735 else
1736 ret = _nfs4_opendata_to_nfs4_state(data);
1737 nfs4_sequence_free_slot(&data->o_res.seq_res);
1738 return ret;
e23008ec
AA		 1739}
1740
864472e9
TM		 1741static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1742{
1743 struct nfs_inode *nfsi = NFS_I(state->inode);
1744 struct nfs_open_context *ctx;
1745
1746 spin_lock(&state->inode->i_lock);
1747 list_for_each_entry(ctx, &nfsi->open_files, list) {
1748 if (ctx->state != state)
1749 continue;
1750 get_nfs_open_context(ctx);
1751 spin_unlock(&state->inode->i_lock);
1752 return ctx;
1753 }
1754 spin_unlock(&state->inode->i_lock);
1755 return ERR_PTR(-ENOENT);
1756}
1757
4a1c0893
TM		 1758static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1759 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1760{
1761 struct nfs4_opendata *opendata;
1762
4a1c0893 1763 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1764 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1765 if (opendata == NULL)
1766 return ERR_PTR(-ENOMEM);
1767 opendata->state = state;
1768 atomic_inc(&state->count);
1769 return opendata;
1770}
1771
24311f88
TM		 1772static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1773 fmode_t fmode)
864472e9 1774{
2ced46c2 1775 struct nfs4_state *newstate;
864472e9
TM		 1776 int ret;
1777
24311f88 1778 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
39f897fd 1779 return 0;
dc0b027d
TM		 1780 opendata->o_arg.open_flags = 0;
1781 opendata->o_arg.fmode = fmode;
be36e185
TM		 1782 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1783 NFS_SB(opendata->dentry->d_sb),
1784 fmode, 0);
2ced46c2
TM		 1785 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1786 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1787 nfs4_init_opendata_res(opendata);
b257957e 1788 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1789 if (ret != 0)
1790 return ret;
2ced46c2 1791 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1792 if (IS_ERR(newstate))
1793 return PTR_ERR(newstate);
24311f88
TM		 1794 if (newstate != opendata->state)
1795 ret = -ESTALE;
643168c2 1796 nfs4_close_state(newstate, fmode);
24311f88 1797 return ret;
864472e9
TM		 1798}
1799
1800static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1801{
864472e9
TM		 1802 int ret;
1803
4f14c194
TM		 1804 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1805 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1806 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1807 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1808 /* memory barrier prior to reading state->n_* */
2ced46c2 1809 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1810 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9 1811 smp_rmb();
24311f88
TM		 1812 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1813 if (ret != 0)
1814 return ret;
1815 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1816 if (ret != 0)
1817 return ret;
1818 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1819 if (ret != 0)
1820 return ret;
1ac7e2fd
TM		 1821 /*
1822 * We may have performed cached opens for all three recoveries.
1823 * Check if we need to update the current stateid.
1824 */
1825 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1826 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1827 write_seqlock(&state->seqlock);
1ac7e2fd 1828 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1829 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1830 write_sequnlock(&state->seqlock);
1ac7e2fd 1831 }
864472e9
TM		 1832 return 0;
1833}
1834
1da177e4
LT		 1835/*
1836 * OPEN_RECLAIM:
1837 * reclaim state on the server after a reboot.
1da177e4 1838 */
539cd03a 1839static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1840{
1ac7e2fd 1841 struct nfs_delegation *delegation;
864472e9 1842 struct nfs4_opendata *opendata;
dc0b027d 1843 fmode_t delegation_type = 0;
1da177e4
LT		 1844 int status;
1845
4a1c0893
TM		 1846 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1847 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1848 if (IS_ERR(opendata))
1849 return PTR_ERR(opendata);
1ac7e2fd
TM		 1850 rcu_read_lock();
1851 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1852 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1853 delegation_type = delegation->type;
1ac7e2fd 1854 rcu_read_unlock();
864472e9
TM		 1855 opendata->o_arg.u.delegation_type = delegation_type;
1856 status = nfs4_open_recover(opendata, state);
c6d00e63 1857 nfs4_opendata_put(opendata);
1da177e4
LT		 1858 return status;
1859}
1860
539cd03a 1861static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1862{
1863 struct nfs_server *server = NFS_SERVER(state->inode);
1864 struct nfs4_exception exception = { };
1865 int err;
1866 do {
539cd03a 1867 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1868 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1869 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1870 continue;
168667c4 1871 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1872 break;
1873 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1874 } while (exception.retry);
1875 return err;
1876}
1877
864472e9
TM		 1878static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1879{
1880 struct nfs_open_context *ctx;
1881 int ret;
1882
1883 ctx = nfs4_state_find_open_context(state);
1884 if (IS_ERR(ctx))
91876b13 1885 return -EAGAIN;
539cd03a 1886 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1887 put_nfs_open_context(ctx);
1888 return ret;
1889}
1890
db4f2e63 1891static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1892{
be76b5b6
TM		 1893 switch (err) {
1894 default:
1895 printk(KERN_ERR "NFS: %s: unhandled error "
1896 "%d.\n", __func__, err);
1897 case 0:
1898 case -ENOENT:
8eee52af 1899 case -EAGAIN:
be76b5b6
TM		 1900 case -ESTALE:
1901 break;
1902 case -NFS4ERR_BADSESSION:
1903 case -NFS4ERR_BADSLOT:
1904 case -NFS4ERR_BAD_HIGH_SLOT:
1905 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1906 case -NFS4ERR_DEADSESSION:
1907 set_bit(NFS_DELEGATED_STATE, &state->flags);
1908 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1909 return -EAGAIN;
1910 case -NFS4ERR_STALE_CLIENTID:
1911 case -NFS4ERR_STALE_STATEID:
1912 set_bit(NFS_DELEGATED_STATE, &state->flags);
be76b5b6
TM		 1913 /* Don't recall a delegation if it was lost */
1914 nfs4_schedule_lease_recovery(server->nfs_client);
1915 return -EAGAIN;
352297b9
CL		 1916 case -NFS4ERR_MOVED:
1917 nfs4_schedule_migration_recovery(server);
1918 return -EAGAIN;
8ef2f8d4
CL		 1919 case -NFS4ERR_LEASE_MOVED:
1920 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1921 return -EAGAIN;
be76b5b6
TM		 1922 case -NFS4ERR_DELEG_REVOKED:
1923 case -NFS4ERR_ADMIN_REVOKED:
404ea356 1924 case -NFS4ERR_EXPIRED:
be76b5b6 1925 case -NFS4ERR_BAD_STATEID:
db4f2e63 1926 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1927 nfs_inode_find_state_and_recover(state->inode,
1928 stateid);
1929 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1930 return -EAGAIN;
be76b5b6
TM		 1931 case -NFS4ERR_DELAY:
1932 case -NFS4ERR_GRACE:
1933 set_bit(NFS_DELEGATED_STATE, &state->flags);
1934 ssleep(1);
1935 return -EAGAIN;
db4f2e63
TM		 1936 case -ENOMEM:
1937 case -NFS4ERR_DENIED:
1938 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1939 return 0;
be76b5b6 1940 }
1da177e4
LT		 1941 return err;
1942}
1943
24311f88
TM		 1944int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
1945 struct nfs4_state *state, const nfs4_stateid *stateid,
1946 fmode_t type)
db4f2e63
TM		 1947{
1948 struct nfs_server *server = NFS_SERVER(state->inode);
1949 struct nfs4_opendata *opendata;
24311f88 1950 int err = 0;
db4f2e63
TM		 1951
1952 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1953 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1954 if (IS_ERR(opendata))
1955 return PTR_ERR(opendata);
1956 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
5e99b532
JL		 1957 write_seqlock(&state->seqlock);
1958 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1959 write_sequnlock(&state->seqlock);
24311f88
TM		 1960 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1961 switch (type & (FMODE_READ|FMODE_WRITE)) {
1962 case FMODE_READ|FMODE_WRITE:
1963 case FMODE_WRITE:
1964 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1965 if (err)
1966 break;
1967 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1968 if (err)
1969 break;
1970 case FMODE_READ:
1971 err = nfs4_open_recover_helper(opendata, FMODE_READ);
1972 }
db4f2e63
TM		 1973 nfs4_opendata_put(opendata);
1974 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1975}
1976
be05c860
CL		 1977static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1978{
1979 struct nfs4_opendata *data = calldata;
1980
7981c8a6
AS		 1981 nfs4_setup_sequence(data->o_arg.server->nfs_client,
1982 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 1983}
1984
cdd4e68b
TM		 1985static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1986{
1987 struct nfs4_opendata *data = calldata;
1988
17ead6c8 1989 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1990
cdd4e68b 1991 data->rpc_status = task->tk_status;
26e976a8 1992 if (data->rpc_status == 0) {
f597c537 1993 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1994 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1995 renew_lease(data->o_res.server, data->timestamp);
a7a3b1e9 1996 data->rpc_done = true;
26e976a8 1997 }
cdd4e68b
TM		 1998}
1999
2000static void nfs4_open_confirm_release(void *calldata)
2001{
2002 struct nfs4_opendata *data = calldata;
2003 struct nfs4_state *state = NULL;
2004
2005 /* If this request hasn't been cancelled, do nothing */
a7a3b1e9 2006 if (!data->cancelled)
cdd4e68b
TM		 2007 goto out_free;
2008 /* In case of error, no cleanup! */
3e309914 2009 if (!data->rpc_done)
cdd4e68b 2010 goto out_free;
cdd4e68b 2011 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2012 if (!IS_ERR(state))
643168c2 2013 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 2014out_free:
c6d00e63 2015 nfs4_opendata_put(data);
cdd4e68b
TM		 2016}
2017
2018static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 2019 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 2020 .rpc_call_done = nfs4_open_confirm_done,
2021 .rpc_release = nfs4_open_confirm_release,
2022};
2023
2024/*
2025 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
2026 */
2027static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
2028{
2b0143b5 2029 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 2030 struct rpc_task *task;
5138fde0
TM		 2031 struct rpc_message msg = {
2032 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
2033 .rpc_argp = &data->c_arg,
2034 .rpc_resp = &data->c_res,
2035 .rpc_cred = data->owner->so_cred,
2036 };
c970aa85
TM		 2037 struct rpc_task_setup task_setup_data = {
2038 .rpc_client = server->client,
5138fde0 2039 .rpc_message = &msg,
c970aa85
TM		 2040 .callback_ops = &nfs4_open_confirm_ops,
2041 .callback_data = data,
101070ca 2042 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2043 .flags = RPC_TASK_ASYNC,
2044 };
1da177e4
LT		 2045 int status;
2046
17ead6c8 2047 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 2048 kref_get(&data->kref);
a7a3b1e9 2049 data->rpc_done = false;
3e309914 2050 data->rpc_status = 0;
5138fde0 2051 data->timestamp = jiffies;
e92c1e0d
BC		 2052 if (data->is_recover)
2053 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
c970aa85 2054 task = rpc_run_task(&task_setup_data);
7a1218a2 2055 if (IS_ERR(task))
cdd4e68b 2056 return PTR_ERR(task);
820bf85c 2057 status = rpc_wait_for_completion_task(task);
cdd4e68b 2058 if (status != 0) {
a7a3b1e9 2059 data->cancelled = true;
cdd4e68b
TM		 2060 smp_wmb();
2061 } else
2062 status = data->rpc_status;
e6b3c4db 2063 rpc_put_task(task);
1da177e4
LT		 2064 return status;
2065}
2066
24ac23ab 2067static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 2068{
24ac23ab
TM		 2069 struct nfs4_opendata *data = calldata;
2070 struct nfs4_state_owner *sp = data->owner;
549b19cc 2071 struct nfs_client *clp = sp->so_server->nfs_client;
2a606188 2072 enum open_claim_type4 claim = data->o_arg.claim;
5138fde0 2073
24ac23ab 2074 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 2075 goto out_wait;
aac00a8d
TM		 2076 /*
2077 * Check if we still need to send an OPEN call, or if we can use
2078 * a delegation instead.
2079 */
2080 if (data->state != NULL) {
2081 struct nfs_delegation *delegation;
2082
dc0b027d 2083 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 2084 goto out_no_action;
aac00a8d
TM		 2085 rcu_read_lock();
2086 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2a606188 2087 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
652f89f6 2088 goto unlock_no_action;
aac00a8d
TM		 2089 rcu_read_unlock();
2090 }
95b72eb0 2091 /* Update client id. */
549b19cc 2092 data->o_arg.clientid = clp->cl_clientid;
2a606188
TM		 2093 switch (claim) {
2094 default:
2095 break;
8188df17
TM		 2096 case NFS4_OPEN_CLAIM_PREVIOUS:
2097 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2098 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 2099 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 2100 case NFS4_OPEN_CLAIM_FH:
2101 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5 2102 }
26e976a8 2103 data->timestamp = jiffies;
42e1cca7 2104 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
d898528c 2105 &data->o_arg.seq_args,
2240a9e2
TM		 2106 &data->o_res.seq_res,
2107 task) != 0)
2108 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 2109
2110 /* Set the create mode (note dependency on the session type) */
2111 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2112 if (data->o_arg.open_flags & O_EXCL) {
2113 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2114 if (nfs4_has_persistent_session(clp))
2115 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2116 else if (clp->cl_mvops->minor_version > 0)
2117 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2118 }
6ee41268 2119 return;
652f89f6 2120unlock_no_action:
9759b0fb 2121 trace_nfs4_cached_open(data->state);
652f89f6 2122 rcu_read_unlock();
6ee41268
TM		 2123out_no_action:
2124 task->tk_action = NULL;
c8da19b9 2125out_wait:
b75ad4cd 2126 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 2127}
2128
24ac23ab
TM		 2129static void nfs4_open_done(struct rpc_task *task, void *calldata)
2130{
2131 struct nfs4_opendata *data = calldata;
1da177e4 2132
24ac23ab 2133 data->rpc_status = task->tk_status;
d898528c 2134
2e80dbe7 2135 if (!nfs4_sequence_process(task, &data->o_res.seq_res))
14516c3a 2136 return;
d898528c 2137
24ac23ab 2138 if (task->tk_status == 0) {
807d66d8
TM		 2139 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2140 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 2141 case S_IFREG:
2142 break;
2143 case S_IFLNK:
24ac23ab 2144 data->rpc_status = -ELOOP;
6f926b5b
TM		 2145 break;
2146 case S_IFDIR:
24ac23ab 2147 data->rpc_status = -EISDIR;
6f926b5b
TM		 2148 break;
2149 default:
24ac23ab 2150 data->rpc_status = -ENOTDIR;
807d66d8 2151 }
6f926b5b 2152 }
26e976a8 2153 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 2154 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2155 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 2156 }
a7a3b1e9 2157 data->rpc_done = true;
24ac23ab 2158}
6f926b5b 2159
24ac23ab
TM		 2160static void nfs4_open_release(void *calldata)
2161{
2162 struct nfs4_opendata *data = calldata;
2163 struct nfs4_state *state = NULL;
2164
2165 /* If this request hasn't been cancelled, do nothing */
a7a3b1e9 2166 if (!data->cancelled)
24ac23ab
TM		 2167 goto out_free;
2168 /* In case of error, no cleanup! */
3e309914 2169 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 2170 goto out_free;
2171 /* In case we need an open_confirm, no cleanup! */
2172 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2173 goto out_free;
24ac23ab 2174 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2175 if (!IS_ERR(state))
643168c2 2176 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 2177out_free:
c6d00e63 2178 nfs4_opendata_put(data);
24ac23ab
TM		 2179}
2180
2181static const struct rpc_call_ops nfs4_open_ops = {
2182 .rpc_call_prepare = nfs4_open_prepare,
2183 .rpc_call_done = nfs4_open_done,
2184 .rpc_release = nfs4_open_release,
2185};
2186
b257957e 2187static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab 2188{
2b0143b5 2189 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 2190 struct nfs_server *server = NFS_SERVER(dir);
2191 struct nfs_openargs *o_arg = &data->o_arg;
2192 struct nfs_openres *o_res = &data->o_res;
2193 struct rpc_task *task;
5138fde0
TM		 2194 struct rpc_message msg = {
2195 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2196 .rpc_argp = o_arg,
2197 .rpc_resp = o_res,
2198 .rpc_cred = data->owner->so_cred,
2199 };
c970aa85
TM		 2200 struct rpc_task_setup task_setup_data = {
2201 .rpc_client = server->client,
5138fde0 2202 .rpc_message = &msg,
c970aa85
TM		 2203 .callback_ops = &nfs4_open_ops,
2204 .callback_data = data,
101070ca 2205 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2206 .flags = RPC_TASK_ASYNC,
2207 };
24ac23ab
TM		 2208 int status;
2209
a9c92d6b 2210 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 2211 kref_get(&data->kref);
a7a3b1e9 2212 data->rpc_done = false;
3e309914 2213 data->rpc_status = 0;
a7a3b1e9
BC		 2214 data->cancelled = false;
2215 data->is_recover = false;
bdeca1b7 2216 if (isrecover) {
8fe72bac 2217 nfs4_set_sequence_privileged(&o_arg->seq_args);
a7a3b1e9 2218 data->is_recover = true;
bdeca1b7 2219 }
c970aa85 2220 task = rpc_run_task(&task_setup_data);
d9b67e1e
AS		 2221 if (IS_ERR(task))
2222 return PTR_ERR(task);
820bf85c 2223 status = rpc_wait_for_completion_task(task);
d9b67e1e 2224 if (status != 0) {
a7a3b1e9 2225 data->cancelled = true;
d9b67e1e
AS		 2226 smp_wmb();
2227 } else
2228 status = data->rpc_status;
2229 rpc_put_task(task);
b257957e
AB		 2230
2231 return status;
2232}
2233
2234static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2235{
2b0143b5 2236 struct inode *dir = d_inode(data->dir);
b257957e 2237 struct nfs_openres *o_res = &data->o_res;
d9b67e1e 2238 int status;
b257957e
AB		 2239
2240 status = nfs4_run_open_task(data, 1);
2241 if (status != 0 || !data->rpc_done)
2242 return status;
2243
6926afd1
TM		 2244 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2245
d7e98258 2246 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM)
b257957e 2247 status = _nfs4_proc_open_confirm(data);
b257957e
AB		 2248
2249 return status;
2250}
2251
f3792d63
TM		 2252/*
2253 * Additional permission checks in order to distinguish between an
2254 * open for read, and an open for execute. This works around the
2255 * fact that NFSv4 OPEN treats read and execute permissions as being
2256 * the same.
2257 * Note that in the non-execute case, we want to turn off permission
2258 * checking if we just created a new file (POSIX open() semantics).
2259 */
6168f62c
WAA		 2260static int nfs4_opendata_access(struct rpc_cred *cred,
2261 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2262 struct nfs4_state *state, fmode_t fmode,
2263 int openflags)
6168f62c
WAA		 2264{
2265 struct nfs_access_entry cache;
1e6f2095 2266 u32 mask, flags;
6168f62c
WAA		 2267
2268 /* access call failed or for some reason the server doesn't
2269 * support any access modes -- defer access call until later */
2270 if (opendata->o_res.access_supported == 0)
2271 return 0;
2272
2273 mask = 0;
f3792d63
TM		 2274 /*
2275 * Use openflags to check for exec, because fmode won't
2276 * always have FMODE_EXEC set when file open for exec.
2277 */
f8d9a897
WAA		 2278 if (openflags & __FMODE_EXEC) {
2279 /* ONLY check for exec rights */
1e6f2095
AS		 2280 if (S_ISDIR(state->inode->i_mode))
2281 mask = NFS4_ACCESS_LOOKUP;
2282 else
2283 mask = NFS4_ACCESS_EXECUTE;
f3792d63 2284 } else if ((fmode & FMODE_READ) && !opendata->file_created)
1e6f2095 2285 mask = NFS4_ACCESS_READ;
6168f62c
WAA		 2286
2287 cache.cred = cred;
6168f62c
WAA		 2288 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2289 nfs_access_add_cache(state->inode, &cache);
2290
1e6f2095
AS		 2291 flags = NFS4_ACCESS_READ | NFS4_ACCESS_EXECUTE | NFS4_ACCESS_LOOKUP;
2292 if ((mask & ~cache.mask & flags) == 0)
6168f62c
WAA		 2293 return 0;
2294
998f40b5 2295 return -EACCES;
6168f62c
WAA		 2296}
2297
b257957e
AB		 2298/*
2299 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2300 */
2301static int _nfs4_proc_open(struct nfs4_opendata *data)
2302{
2b0143b5 2303 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2304 struct nfs_server *server = NFS_SERVER(dir);
2305 struct nfs_openargs *o_arg = &data->o_arg;
2306 struct nfs_openres *o_res = &data->o_res;
2307 int status;
2308
2309 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2310 if (!data->rpc_done)
2311 return status;
2312 if (status != 0) {
2313 if (status == -NFS4ERR_BADNAME &&
2314 !(o_arg->open_flags & O_CREAT))
2315 return -ENOENT;
24ac23ab 2316 return status;
08ef7bd3 2317 }
24ac23ab 2318
6926afd1
TM		 2319 nfs_fattr_map_and_free_names(server, &data->f_attr);
2320
5bc2afc2 2321 if (o_arg->open_flags & O_CREAT) {
5bc2afc2 2322 if (o_arg->open_flags & O_EXCL)
a7a3b1e9 2323 data->file_created = true;
5bc2afc2 2324 else if (o_res->cinfo.before != o_res->cinfo.after)
a7a3b1e9 2325 data->file_created = true;
2dfc6173 2326 if (data->file_created || dir->i_version != o_res->cinfo.after)
d3129ef6
TM		 2327 update_changeattr(dir, &o_res->cinfo,
2328 o_res->f_attr->time_start);
5bc2afc2 2329 }
0df5dd4a
TM		 2330 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2331 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2332 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2333 status = _nfs4_proc_open_confirm(data);
1da177e4 2334 if (status != 0)
24ac23ab 2335 return status;
1da177e4 2336 }
56e0d71e
TM		 2337 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) {
2338 nfs4_sequence_free_slot(&o_res->seq_res);
8935ef66 2339 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
56e0d71e 2340 }
24ac23ab 2341 return 0;
1da177e4
LT		 2342}
2343
1da177e4
LT		 2344/*
2345 * OPEN_EXPIRED:
2346 * reclaim state on the server after a network partition.
2347 * Assumes caller holds the appropriate lock
2348 */
539cd03a 2349static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2350{
e56e0b78 2351 struct nfs4_opendata *opendata;
864472e9 2352 int ret;
1da177e4 2353
4a1c0893 2354 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2355 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2356 if (IS_ERR(opendata))
2357 return PTR_ERR(opendata);
864472e9 2358 ret = nfs4_open_recover(opendata, state);
35d05778 2359 if (ret == -ESTALE)
3d4ff43d 2360 d_drop(ctx->dentry);
c6d00e63 2361 nfs4_opendata_put(opendata);
864472e9 2362 return ret;
1da177e4
LT		 2363}
2364
a9ed2e25 2365static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2366{
539cd03a 2367 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2368 struct nfs4_exception exception = { };
2369 int err;
2370
2371 do {
539cd03a 2372 err = _nfs4_open_expired(ctx, state);
42113a75 2373 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2374 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2375 continue;
a9ed2e25
TM		 2376 switch (err) {
2377 default:
2378 goto out;
2379 case -NFS4ERR_GRACE:
2380 case -NFS4ERR_DELAY:
2381 nfs4_handle_exception(server, err, &exception);
2382 err = 0;
2383 }
202b50dc 2384 } while (exception.retry);
a9ed2e25 2385out:
202b50dc
TM		 2386 return err;
2387}
2388
1da177e4
LT		 2389static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2390{
1da177e4 2391 struct nfs_open_context *ctx;
864472e9 2392 int ret;
1da177e4 2393
864472e9
TM		 2394 ctx = nfs4_state_find_open_context(state);
2395 if (IS_ERR(ctx))
91876b13 2396 return -EAGAIN;
539cd03a 2397 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2398 put_nfs_open_context(ctx);
2399 return ret;
1da177e4
LT		 2400}
2401
41020b67
TM		 2402static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
2403 const nfs4_stateid *stateid)
4dfd4f7a 2404{
41020b67 2405 nfs_remove_bad_delegation(state->inode, stateid);
4dfd4f7a
TM		 2406 write_seqlock(&state->seqlock);
2407 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2408 write_sequnlock(&state->seqlock);
2409 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2410}
2411
2412static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2413{
2414 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
41020b67 2415 nfs_finish_clear_delegation_stateid(state, NULL);
4dfd4f7a
TM		 2416}
2417
2418static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2419{
2420 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2421 nfs40_clear_delegation_stateid(state);
2422 return nfs4_open_expired(sp, state);
2423}
2424
45870d69
TM		 2425static int nfs40_test_and_free_expired_stateid(struct nfs_server *server,
2426 nfs4_stateid *stateid,
2427 struct rpc_cred *cred)
2428{
2429 return -NFS4ERR_BAD_STATEID;
2430}
2431
f062eb6c 2432#if defined(CONFIG_NFS_V4_1)
4586f6e2
TM		 2433static int nfs41_test_and_free_expired_stateid(struct nfs_server *server,
2434 nfs4_stateid *stateid,
2435 struct rpc_cred *cred)
2436{
2437 int status;
2438
f7a62ada
TM		 2439 switch (stateid->type) {
2440 default:
2441 break;
2442 case NFS4_INVALID_STATEID_TYPE:
2443 case NFS4_SPECIAL_STATEID_TYPE:
2444 return -NFS4ERR_BAD_STATEID;
2445 case NFS4_REVOKED_STATEID_TYPE:
2446 goto out_free;
2447 }
4586f6e2 2448
f7a62ada 2449 status = nfs41_test_stateid(server, stateid, cred);
4586f6e2
TM		 2450 switch (status) {
2451 case -NFS4ERR_EXPIRED:
2452 case -NFS4ERR_ADMIN_REVOKED:
2453 case -NFS4ERR_DELEG_REVOKED:
f7a62ada
TM		 2454 break;
2455 default:
4586f6e2
TM		 2456 return status;
2457 }
f7a62ada
TM		 2458out_free:
2459 /* Ack the revoked state to the server */
f0b0bf88 2460 nfs41_free_stateid(server, stateid, cred, true);
f7a62ada 2461 return -NFS4ERR_EXPIRED;
4586f6e2
TM		 2462}
2463
0c116cad 2464static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2465{
f062eb6c 2466 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2467 nfs4_stateid stateid;
ab7cb0df 2468 struct nfs_delegation *delegation;
0c116cad
TM		 2469 struct rpc_cred *cred;
2470 int status;
3e60ffdd 2471
ab7cb0df
TM		 2472 /* Get the delegation credential for use by test/free_stateid */
2473 rcu_read_lock();
2474 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2475 if (delegation == NULL) {
ab7cb0df 2476 rcu_read_unlock();
0c116cad
TM		 2477 return;
2478 }
2479
2480 nfs4_stateid_copy(&stateid, &delegation->stateid);
0e3d3e5d
OK		 2481 if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags) ||
2482 !test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED,
2483 &delegation->flags)) {
4c8e5447 2484 rcu_read_unlock();
41020b67 2485 nfs_finish_clear_delegation_stateid(state, &stateid);
4c8e5447
TM		 2486 return;
2487 }
0c116cad 2488
0c116cad
TM		 2489 cred = get_rpccred(delegation->cred);
2490 rcu_read_unlock();
4586f6e2 2491 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
0c116cad 2492 trace_nfs4_test_delegation_stateid(state, NULL, status);
f7a62ada 2493 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID)
41020b67 2494 nfs_finish_clear_delegation_stateid(state, &stateid);
ab7cb0df 2495
0c116cad 2496 put_rpccred(cred);
3e60ffdd
CL		 2497}
2498
c5896fc8
TM		 2499/**
2500 * nfs41_check_expired_locks - possibly free a lock stateid
2501 *
2502 * @state: NFSv4 state for an inode
2503 *
2504 * Returns NFS_OK if recovery for this stateid is now finished.
2505 * Otherwise a negative NFS4ERR value is returned.
2506 */
2507static int nfs41_check_expired_locks(struct nfs4_state *state)
2508{
2509 int status, ret = NFS_OK;
d75a6a0e 2510 struct nfs4_lock_state *lsp, *prev = NULL;
c5896fc8
TM		 2511 struct nfs_server *server = NFS_SERVER(state->inode);
2512
2513 if (!test_bit(LK_STATE_IN_USE, &state->flags))
2514 goto out;
d75a6a0e
BC		 2515
2516 spin_lock(&state->state_lock);
c5896fc8
TM		 2517 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
2518 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
2519 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
2520
d75a6a0e
BC		 2521 atomic_inc(&lsp->ls_count);
2522 spin_unlock(&state->state_lock);
2523
2524 nfs4_put_lock_state(prev);
2525 prev = lsp;
2526
c5896fc8
TM		 2527 status = nfs41_test_and_free_expired_stateid(server,
2528 &lsp->ls_stateid,
2529 cred);
2530 trace_nfs4_test_lock_stateid(state, lsp, status);
2531 if (status == -NFS4ERR_EXPIRED ||
2532 status == -NFS4ERR_BAD_STATEID) {
2533 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
67dd4830 2534 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE;
c5896fc8
TM		 2535 if (!recover_lost_locks)
2536 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2537 } else if (status != NFS_OK) {
2538 ret = status;
d75a6a0e
BC		 2539 nfs4_put_lock_state(prev);
2540 goto out;
c5896fc8 2541 }
d75a6a0e 2542 spin_lock(&state->state_lock);
c5896fc8 2543 }
d75a6a0e
BC		 2544 }
2545 spin_unlock(&state->state_lock);
2546 nfs4_put_lock_state(prev);
c5896fc8
TM		 2547out:
2548 return ret;
2549}
2550
3e60ffdd
CL		 2551/**
2552 * nfs41_check_open_stateid - possibly free an open stateid
2553 *
2554 * @state: NFSv4 state for an inode
2555 *
2556 * Returns NFS_OK if recovery for this stateid is now finished.
2557 * Otherwise a negative NFS4ERR value is returned.
2558 */
2559static int nfs41_check_open_stateid(struct nfs4_state *state)
2560{
2561 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2562 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2563 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2564 int status;
2565
b134fc4a 2566 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) {
8a64c4ef
TM		 2567 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) {
2568 if (nfs4_have_delegation(state->inode, state->state))
2569 return NFS_OK;
2570 return -NFS4ERR_OPENMODE;
2571 }
3e60ffdd 2572 return -NFS4ERR_BAD_STATEID;
b134fc4a 2573 }
4586f6e2 2574 status = nfs41_test_and_free_expired_stateid(server, stateid, cred);
08cb47fa 2575 trace_nfs4_test_open_stateid(state, NULL, status);
f7a62ada 2576 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) {
3e60ffdd
CL		 2577 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2578 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2579 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2580 clear_bit(NFS_OPEN_STATE, &state->flags);
67dd4830 2581 stateid->type = NFS4_INVALID_STATEID_TYPE;
8a64c4ef 2582 return status;
c0ca0e59 2583 }
8a64c4ef
TM		 2584 if (nfs_open_stateid_recover_openmode(state))
2585 return -NFS4ERR_OPENMODE;
2586 return NFS_OK;
b01dd1d8
BS		 2587}
2588
2589static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2590{
eb64cf96 2591 int status;
b01dd1d8 2592
0c116cad 2593 nfs41_check_delegation_stateid(state);
c5896fc8
TM		 2594 status = nfs41_check_expired_locks(state);
2595 if (status != NFS_OK)
2596 return status;
3e60ffdd 2597 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2598 if (status != NFS_OK)
2599 status = nfs4_open_expired(sp, state);
2600 return status;
f062eb6c
BS		 2601}
2602#endif
2603
aa53ed54
JL		 2604/*
2605 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2606 * fields corresponding to attributes that were used to store the verifier.
2607 * Make sure we clobber those fields in the later setattr call
2608 */
5334c5bd
KM		 2609static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2610 struct iattr *sattr, struct nfs4_label **label)
aa53ed54 2611{
5334c5bd
KM		 2612 const u32 *attrset = opendata->o_res.attrset;
2613
2614 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
aa53ed54
JL		 2615 !(sattr->ia_valid & ATTR_ATIME_SET))
2616 sattr->ia_valid |= ATTR_ATIME;
2617
5334c5bd 2618 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
aa53ed54
JL		 2619 !(sattr->ia_valid & ATTR_MTIME_SET))
2620 sattr->ia_valid |= ATTR_MTIME;
5334c5bd
KM		 2621
2622 /* Except MODE, it seems harmless of setting twice. */
a430607b 2623 if (opendata->o_arg.createmode != NFS4_CREATE_EXCLUSIVE &&
501e7a46
BC		 2624 (attrset[1] & FATTR4_WORD1_MODE ||
2625 attrset[2] & FATTR4_WORD2_MODE_UMASK))
5334c5bd
KM		 2626 sattr->ia_valid &= ~ATTR_MODE;
2627
2628 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2629 *label = NULL;
aa53ed54
JL		 2630}
2631
c21443c2
TM		 2632static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2633 fmode_t fmode,
2634 int flags,
3efb9722 2635 struct nfs_open_context *ctx)
c21443c2
TM		 2636{
2637 struct nfs4_state_owner *sp = opendata->owner;
2638 struct nfs_server *server = sp->so_server;
275bb307 2639 struct dentry *dentry;
c21443c2
TM		 2640 struct nfs4_state *state;
2641 unsigned int seq;
2642 int ret;
2643
2644 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2645
2646 ret = _nfs4_proc_open(opendata);
dca78001 2647 if (ret != 0)
c21443c2
TM		 2648 goto out;
2649
2650 state = nfs4_opendata_to_nfs4_state(opendata);
2651 ret = PTR_ERR(state);
2652 if (IS_ERR(state))
2653 goto out;
a974deee 2654 ctx->state = state;
c21443c2
TM		 2655 if (server->caps & NFS_CAP_POSIX_LOCK)
2656 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
a8ce377a
JL		 2657 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
2658 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
c21443c2 2659
275bb307 2660 dentry = opendata->dentry;
2b0143b5 2661 if (d_really_is_negative(dentry)) {
668d0cd5 2662 struct dentry *alias;
275bb307 2663 d_drop(dentry);
668d0cd5
AV		 2664 alias = d_exact_alias(dentry, state->inode);
2665 if (!alias)
2666 alias = d_splice_alias(igrab(state->inode), dentry);
2667 /* d_splice_alias() can't fail here - it's a non-directory */
2668 if (alias) {
275bb307 2669 dput(ctx->dentry);
668d0cd5 2670 ctx->dentry = dentry = alias;
275bb307
TM		 2671 }
2672 nfs_set_verifier(dentry,
2b0143b5 2673 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2674 }
2675
c21443c2
TM		 2676 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2677 if (ret != 0)
2678 goto out;
2679
2b0143b5 2680 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2681 nfs_inode_attach_open_context(ctx);
2682 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2683 nfs4_schedule_stateid_recovery(server, state);
2684 }
c21443c2
TM		 2685out:
2686 return ret;
2687}
2688
1da177e4 2689/*
24ac23ab 2690 * Returns a referenced nfs4_state
1da177e4 2691 */
82be417a 2692static int _nfs4_do_open(struct inode *dir,
4197a055 2693 struct nfs_open_context *ctx,
82be417a
AA		 2694 int flags,
2695 struct iattr *sattr,
5bc2afc2
TM		 2696 struct nfs4_label *label,
2697 int *opened)
1da177e4
LT		 2698{
2699 struct nfs4_state_owner *sp;
2700 struct nfs4_state *state = NULL;
2701 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2702 struct nfs4_opendata *opendata;
4197a055
TM		 2703 struct dentry *dentry = ctx->dentry;
2704 struct rpc_cred *cred = ctx->cred;
2705 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2706 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2707 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2708 struct nfs4_label *olabel = NULL;
aac00a8d 2709 int status;
1da177e4
LT		 2710
2711 /* Protect against reboot recovery conflicts */
1da177e4 2712 status = -ENOMEM;
d1e284d5
TM		 2713 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2714 if (sp == NULL) {
1da177e4
LT		 2715 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2716 goto out_err;
2717 }
334f87dd 2718 status = nfs4_client_recover_expired_lease(server->nfs_client);
58d9714a 2719 if (status != 0)
b4454fe1 2720 goto err_put_state_owner;
2b0143b5
DH		 2721 if (d_really_is_positive(dentry))
2722 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2723 status = -ENOMEM;
2b0143b5 2724 if (d_really_is_positive(dentry))
49f9a0fa 2725 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2726 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2727 label, claim, GFP_KERNEL);
e56e0b78 2728 if (opendata == NULL)
95d35cb4 2729 goto err_put_state_owner;
1da177e4 2730
14c43f76
DQ		 2731 if (label) {
2732 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2733 if (IS_ERR(olabel)) {
2734 status = PTR_ERR(olabel);
2735 goto err_opendata_put;
2736 }
2737 }
2738
e911b815
TM		 2739 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2740 if (!opendata->f_attr.mdsthreshold) {
2741 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2742 if (!opendata->f_attr.mdsthreshold)
2743 goto err_free_label;
2744 }
1549210f 2745 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2746 }
2b0143b5
DH		 2747 if (d_really_is_positive(dentry))
2748 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2749
3efb9722 2750 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2751 if (status != 0)
14c43f76 2752 goto err_free_label;
3efb9722 2753 state = ctx->state;
6168f62c 2754
efcbc04e 2755 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 2756 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
5334c5bd 2757 nfs4_exclusive_attrset(opendata, sattr, &label);
a1d1c4f1
TM		 2758 /*
2759 * send create attributes which was not set by open
2760 * with an extra setattr.
2761 */
2762 if (sattr->ia_valid & NFS4_VALID_ATTRS) {
2763 nfs_fattr_init(opendata->o_res.f_attr);
2764 status = nfs4_do_setattr(state->inode, cred,
2765 opendata->o_res.f_attr, sattr,
29b59f94 2766 ctx, label, olabel);
a1d1c4f1
TM		 2767 if (status == 0) {
2768 nfs_setattr_update_inode(state->inode, sattr,
2769 opendata->o_res.f_attr);
2770 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2771 }
1775fd3e 2772 }
0ab64e0e 2773 }
c5c3fb5f 2774 if (opened && opendata->file_created)
5bc2afc2 2775 *opened |= FILE_CREATED;
82be417a 2776
e911b815 2777 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2778 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2779 opendata->f_attr.mdsthreshold = NULL;
2780 }
82be417a 2781
14c43f76
DQ		 2782 nfs4_label_free(olabel);
2783
c6d00e63 2784 nfs4_opendata_put(opendata);
1da177e4 2785 nfs4_put_state_owner(sp);
1da177e4 2786 return 0;
14c43f76
DQ		 2787err_free_label:
2788 nfs4_label_free(olabel);
c6d00e63
TM		 2789err_opendata_put:
2790 nfs4_opendata_put(opendata);
e56e0b78
TM		 2791err_put_state_owner:
2792 nfs4_put_state_owner(sp);
1da177e4 2793out_err:
1da177e4
LT		 2794 return status;
2795}
2796
2797
82be417a 2798static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2799 struct nfs_open_context *ctx,
82be417a
AA		 2800 int flags,
2801 struct iattr *sattr,
5bc2afc2
TM		 2802 struct nfs4_label *label,
2803 int *opened)
1da177e4 2804{
49f9a0fa 2805 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2806 struct nfs4_exception exception = { };
2807 struct nfs4_state *res;
2808 int status;
2809
2810 do {
5bc2afc2 2811 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2812 res = ctx->state;
42113a75 2813 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2814 if (status == 0)
2815 break;
2816 /* NOTE: BAD_SEQID means the server and client disagree about the
2817 * book-keeping w.r.t. state-changing operations
2818 * (OPEN/CLOSE/LOCK/LOCKU...)
2819 * It is actually a sign of a bug on the client or on the server.
2820 *
2821 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2822 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2823 * have unhashed the old state_owner for us, and that we can
2824 * therefore safely retry using a new one. We should still warn
2825 * the user though...
2826 */
2827 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2828 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2829 " returned a bad sequence-id error!\n",
2830 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2831 exception.retry = 1;
2832 continue;
2833 }
550f5747
TM		 2834 /*
2835 * BAD_STATEID on OPEN means that the server cancelled our
2836 * state before it received the OPEN_CONFIRM.
2837 * Recover by retrying the request as per the discussion
2838 * on Page 181 of RFC3530.
2839 */
2840 if (status == -NFS4ERR_BAD_STATEID) {
2841 exception.retry = 1;
2842 continue;
2843 }
aac00a8d
TM		 2844 if (status == -EAGAIN) {
2845 /* We must have found a delegation */
2846 exception.retry = 1;
2847 continue;
2848 }
49f9a0fa
TM		 2849 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2850 continue;
2851 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2852 status, &exception));
2853 } while (exception.retry);
2854 return res;
2855}
2856
8487c479
TM		 2857static int _nfs4_do_setattr(struct inode *inode,
2858 struct nfs_setattrargs *arg,
2859 struct nfs_setattrres *res,
2860 struct rpc_cred *cred,
29b59f94 2861 struct nfs_open_context *ctx)
1da177e4 2862{
3e4f6290 2863 struct nfs_server *server = NFS_SERVER(inode);
d9b67e1e 2864 struct rpc_message msg = {
659bfcd6 2865 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
8487c479
TM		 2866 .rpc_argp = arg,
2867 .rpc_resp = res,
659bfcd6 2868 .rpc_cred = cred,
d9b67e1e 2869 };
abf4e13c 2870 struct rpc_cred *delegation_cred = NULL;
26e976a8 2871 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2872 fmode_t fmode;
2873 bool truncate;
65e4308d 2874 int status;
1da177e4 2875
8487c479 2876 nfs_fattr_init(res->fattr);
1da177e4 2877
ee3ae84e 2878 /* Servers should only apply open mode checks for file size changes */
8487c479 2879 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
ee3ae84e
TM		 2880 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2881
8487c479 2882 if (nfs4_copy_delegation_stateid(inode, fmode, &arg->stateid, &delegation_cred)) {
ee3ae84e 2883 /* Use that stateid */
29b59f94 2884 } else if (truncate && ctx != NULL) {
17393475 2885 struct nfs_lock_context *l_ctx;
29b59f94 2886 if (!nfs4_valid_open_stateid(ctx->state))
0418dae1 2887 return -EBADF;
17393475
N		 2888 l_ctx = nfs_get_lock_context(ctx);
2889 if (IS_ERR(l_ctx))
2890 return PTR_ERR(l_ctx);
7a0566b3
N		 2891 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx,
2892 &arg->stateid, &delegation_cred);
2893 nfs_put_lock_context(l_ctx);
2894 if (status == -EIO)
0418dae1 2895 return -EBADF;
08e9eac4 2896 } else
8487c479 2897 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
abf4e13c
TM		 2898 if (delegation_cred)
2899 msg.rpc_cred = delegation_cred;
1da177e4 2900
8487c479 2901 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
abf4e13c
TM		 2902
2903 put_rpccred(delegation_cred);
29b59f94 2904 if (status == 0 && ctx != NULL)
26e976a8 2905 renew_lease(server, timestamp);
8487c479 2906 trace_nfs4_setattr(inode, &arg->stateid, status);
65e4308d 2907 return status;
1da177e4
LT		 2908}
2909
659bfcd6
TM		 2910static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2911 struct nfs_fattr *fattr, struct iattr *sattr,
29b59f94 2912 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
1775fd3e 2913 struct nfs4_label *olabel)
1da177e4 2914{
3e4f6290 2915 struct nfs_server *server = NFS_SERVER(inode);
29b59f94 2916 struct nfs4_state *state = ctx ? ctx->state : NULL;
d9b67e1e
AS		 2917 struct nfs_setattrargs arg = {
2918 .fh = NFS_FH(inode),
2919 .iap = sattr,
8487c479
TM		 2920 .server = server,
2921 .bitmask = server->attr_bitmask,
2922 .label = ilabel,
d9b67e1e
AS		 2923 };
2924 struct nfs_setattrres res = {
8487c479
TM		 2925 .fattr = fattr,
2926 .label = olabel,
2927 .server = server,
d9b67e1e 2928 };
a1d0b5ee
TM		 2929 struct nfs4_exception exception = {
2930 .state = state,
3114ea7a 2931 .inode = inode,
8487c479 2932 .stateid = &arg.stateid,
a1d0b5ee 2933 };
1da177e4 2934 int err;
8487c479
TM		 2935
2936 arg.bitmask = nfs4_bitmask(server, ilabel);
2937 if (ilabel)
2938 arg.bitmask = nfs4_bitmask(server, olabel);
2939
1da177e4 2940 do {
29b59f94 2941 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx);
451146be
TM		 2942 switch (err) {
2943 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2944 if (!(sattr->ia_valid & ATTR_SIZE)) {
2945 pr_warn_once("NFSv4: server %s is incorrectly "
2946 "applying open mode checks to "
2947 "a SETATTR that is not "
2948 "changing file size.\n",
2949 server->nfs_client->cl_hostname);
2950 }
451146be
TM		 2951 if (state && !(state->state & FMODE_WRITE)) {
2952 err = -EBADF;
2953 if (sattr->ia_valid & ATTR_OPEN)
2954 err = -EACCES;
2955 goto out;
2956 }
2957 }
2958 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2959 } while (exception.retry);
451146be 2960out:
1da177e4
LT		 2961 return err;
2962}
2963
500d701f
PT		 2964static bool
2965nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
2966{
2967 if (inode == NULL || !nfs_have_layout(inode))
2968 return false;
2969
2970 return pnfs_wait_on_layoutreturn(inode, task);
2971}
2972
1da177e4
LT		 2973struct nfs4_closedata {
2974 struct inode *inode;
2975 struct nfs4_state *state;
2976 struct nfs_closeargs arg;
2977 struct nfs_closeres res;
cf805165
TM		 2978 struct {
2979 struct nfs4_layoutreturn_args arg;
2980 struct nfs4_layoutreturn_res res;
4d796d75 2981 struct nfs4_xdr_opaque_data ld_private;
cf805165
TM		 2982 u32 roc_barrier;
2983 bool roc;
2984 } lr;
516a6af6 2985 struct nfs_fattr fattr;
26e976a8 2986 unsigned long timestamp;
1da177e4
LT		 2987};
2988
963d8fe5 2989static void nfs4_free_closedata(void *data)
9512135d 2990{
963d8fe5
TM		 2991 struct nfs4_closedata *calldata = data;
2992 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2993 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2994
cf805165 2995 if (calldata->lr.roc)
1c5bd76d
TM		 2996 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res,
2997 calldata->res.lr_ret);
9512135d
TM		 2998 nfs4_put_open_state(calldata->state);
2999 nfs_free_seqid(calldata->arg.seqid);
9512135d 3000 nfs4_put_state_owner(sp);
322b2b90 3001 nfs_sb_deactive(sb);
9512135d
TM		 3002 kfree(calldata);
3003}
3004
963d8fe5 3005static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 3006{
963d8fe5 3007 struct nfs4_closedata *calldata = data;
1da177e4 3008 struct nfs4_state *state = calldata->state;
1da177e4 3009 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 3010 nfs4_stateid *res_stateid = NULL;
1da177e4 3011
a3ca5651 3012 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 3013 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3014 return;
42113a75 3015 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
cf805165
TM		 3016
3017 /* Handle Layoutreturn errors */
3018 if (calldata->arg.lr_args && task->tk_status != 0) {
3019 switch (calldata->res.lr_ret) {
3020 default:
3021 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
3022 break;
3023 case 0:
3024 calldata->arg.lr_args = NULL;
3025 calldata->res.lr_res = NULL;
3026 break;
3027 case -NFS4ERR_ADMIN_REVOKED:
3028 case -NFS4ERR_DELEG_REVOKED:
3029 case -NFS4ERR_EXPIRED:
3030 case -NFS4ERR_BAD_STATEID:
3031 case -NFS4ERR_OLD_STATEID:
3032 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
3033 case -NFS4ERR_WRONG_CRED:
3034 calldata->arg.lr_args = NULL;
3035 calldata->res.lr_res = NULL;
3036 calldata->res.lr_ret = 0;
3037 rpc_restart_call_prepare(task);
3038 return;
3039 }
3040 }
3041
d9b67e1e 3042 /* hmm. we are done with the inode, and in the process of freeing
1da177e4
LT		 3043 * the state_owner. we keep this around to process errors
3044 */
1da177e4
LT		 3045 switch (task->tk_status) {
3046 case 0:
412f6c4c 3047 res_stateid = &calldata->res.stateid;
26e976a8 3048 renew_lease(server, calldata->timestamp);
412f6c4c 3049 break;
f07d4a31
TM		 3050 case -NFS4ERR_ACCESS:
3051 if (calldata->arg.bitmask != NULL) {
3052 calldata->arg.bitmask = NULL;
3053 calldata->res.fattr = NULL;
3054 task->tk_status = 0;
3055 rpc_restart_call_prepare(task);
3056 goto out_release;
3057
3058 }
3059 break;
69794ad7 3060 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 3061 case -NFS4ERR_STALE_STATEID:
26d36301
TM		 3062 case -NFS4ERR_EXPIRED:
3063 nfs4_free_revoked_stateid(server,
3064 &calldata->arg.stateid,
3065 task->tk_msg.rpc_cred);
9e33bed5
TM		 3066 case -NFS4ERR_OLD_STATEID:
3067 case -NFS4ERR_BAD_STATEID:
566fcec6 3068 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 3069 &state->open_stateid)) {
566fcec6
TM		 3070 rpc_restart_call_prepare(task);
3071 goto out_release;
3072 }
dc0b027d 3073 if (calldata->arg.fmode == 0)
9e33bed5 3074 break;
1da177e4 3075 default:
8478eaa1 3076 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 3077 rpc_restart_call_prepare(task);
69794ad7
TM		 3078 goto out_release;
3079 }
1da177e4 3080 }
4a1e2feb
TM		 3081 nfs_clear_open_stateid(state, &calldata->arg.stateid,
3082 res_stateid, calldata->arg.fmode);
69794ad7 3083out_release:
72211dbe 3084 nfs_release_seqid(calldata->arg.seqid);
d8d84983 3085 nfs_refresh_inode(calldata->inode, &calldata->fattr);
a3ca5651 3086 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 3087}
3088
4ce70ada 3089static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 3090{
4ce70ada 3091 struct nfs4_closedata *calldata = data;
9512135d 3092 struct nfs4_state *state = calldata->state;
7fdab069 3093 struct inode *inode = calldata->inode;
aee7af35 3094 bool is_rdonly, is_wronly, is_rdwr;
88069f77 3095 int call_close = 0;
9512135d 3096
a3ca5651 3097 dprintk("%s: begin!\n", __func__);
963d8fe5 3098 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 3099 goto out_wait;
003707c7 3100
88069f77 3101 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 3102 spin_lock(&state->owner->so_lock);
aee7af35
TM		 3103 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
3104 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
3105 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 3106 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 3107 /* Calculate the change in open mode */
cd9288ff 3108 calldata->arg.fmode = 0;
e7616923 3109 if (state->n_rdwr == 0) {
cd9288ff
TM		 3110 if (state->n_rdonly == 0)
3111 call_close |= is_rdonly;
3112 else if (is_rdonly)
3113 calldata->arg.fmode |= FMODE_READ;
3114 if (state->n_wronly == 0)
3115 call_close |= is_wronly;
3116 else if (is_wronly)
3117 calldata->arg.fmode |= FMODE_WRITE;
e547f262
TM		 3118 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
3119 call_close |= is_rdwr;
cd9288ff
TM		 3120 } else if (is_rdwr)
3121 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
3122
5cc7861e
TM		 3123 if (!nfs4_valid_open_stateid(state) ||
3124 test_bit(NFS_OPEN_STATE, &state->flags) == 0)
5d422301 3125 call_close = 0;
4cecb76f 3126 spin_unlock(&state->owner->so_lock);
88069f77
TM		 3127
3128 if (!call_close) {
963d8fe5 3129 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 3130 goto out_no_action;
9512135d 3131 }
88069f77 3132
1c5bd76d 3133 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) {
500d701f
PT		 3134 nfs_release_seqid(calldata->arg.seqid);
3135 goto out_wait;
3136 }
3137
9413a1a1 3138 if (calldata->arg.fmode == 0)
88069f77 3139 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3ecefc92 3140
9413a1a1 3141 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) {
3ecefc92
TM		 3142 /* Close-to-open cache consistency revalidation */
3143 if (!nfs4_have_delegation(inode, FMODE_READ))
3144 calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask;
3145 else
3146 calldata->arg.bitmask = NULL;
3147 }
3c13cb5b 3148
6ae37339
TM		 3149 calldata->arg.share_access =
3150 nfs4_map_atomic_open_share(NFS_SERVER(inode),
3151 calldata->arg.fmode, 0);
88069f77 3152
d8d84983
TM		 3153 if (calldata->res.fattr == NULL)
3154 calldata->arg.bitmask = NULL;
3155 else if (calldata->arg.bitmask == NULL)
3156 calldata->res.fattr = NULL;
26e976a8 3157 calldata->timestamp = jiffies;
42e1cca7 3158 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client,
9d12b216
TM		 3159 &calldata->arg.seq_args,
3160 &calldata->res.seq_res,
2240a9e2
TM		 3161 task) != 0)
3162 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 3163 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 3164 return;
3165out_no_action:
3166 task->tk_action = NULL;
3167out_wait:
3168 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 3169}
3170
963d8fe5 3171static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 3172 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 3173 .rpc_call_done = nfs4_close_done,
3174 .rpc_release = nfs4_free_closedata,
3175};
3176
1da177e4
LT		 3177/*
3178 * It is possible for data to be read/written from a mem-mapped file
3179 * after the sys_close call (which hits the vfs layer as a flush).
3180 * This means that we can't safely call nfsv4 close on a file until
3181 * the inode is cleared. This in turn means that we are not good
3182 * NFSv4 citizens - we do not indicate to the server to update the file's
3183 * share state even when we are done with one of the three share
3184 * stateid's in the inode.
3185 *
3186 * NOTE: Caller must be holding the sp->so_owner semaphore!
3187 */
1f7977c1 3188int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 3189{
4a35bd41 3190 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 3191 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 3192 struct nfs4_closedata *calldata;
b39e625b
TM		 3193 struct nfs4_state_owner *sp = state->owner;
3194 struct rpc_task *task;
5138fde0
TM		 3195 struct rpc_message msg = {
3196 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3197 .rpc_cred = state->owner->so_cred,
3198 };
c970aa85
TM		 3199 struct rpc_task_setup task_setup_data = {
3200 .rpc_client = server->client,
5138fde0 3201 .rpc_message = &msg,
c970aa85 3202 .callback_ops = &nfs4_close_ops,
101070ca 3203 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3204 .flags = RPC_TASK_ASYNC,
3205 };
9512135d 3206 int status = -ENOMEM;
1da177e4 3207
fa940720
WAA		 3208 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3209 &task_setup_data.rpc_client, &msg);
3210
8535b2be 3211 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 3212 if (calldata == NULL)
9512135d 3213 goto out;
a9c92d6b 3214 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 3215 calldata->inode = state->inode;
1da177e4 3216 calldata->state = state;
4a35bd41 3217 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 3218 /* Serialization for the sequence id */
63f5f796
TM		 3219 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3220 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 3221 if (IS_ERR(calldata->arg.seqid))
9512135d 3222 goto out_free_calldata;
d8d84983 3223 nfs_fattr_init(&calldata->fattr);
dc0b027d 3224 calldata->arg.fmode = 0;
4d796d75 3225 calldata->lr.arg.ld_private = &calldata->lr.ld_private;
516a6af6 3226 calldata->res.fattr = &calldata->fattr;
c1d51931 3227 calldata->res.seqid = calldata->arg.seqid;
516a6af6 3228 calldata->res.server = server;
cf805165 3229 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
1c5bd76d
TM		 3230 calldata->lr.roc = pnfs_roc(state->inode,
3231 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred);
3232 if (calldata->lr.roc) {
3233 calldata->arg.lr_args = &calldata->lr.arg;
3234 calldata->res.lr_res = &calldata->lr.res;
3235 }
643168c2 3236 nfs_sb_active(calldata->inode->i_sb);
9512135d 3237
1174dd1f
TM		 3238 msg.rpc_argp = &calldata->arg;
3239 msg.rpc_resp = &calldata->res;
c970aa85
TM		 3240 task_setup_data.callback_data = calldata;
3241 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 3242 if (IS_ERR(task))
3243 return PTR_ERR(task);
a49c3c77
TM		 3244 status = 0;
3245 if (wait)
3246 status = rpc_wait_for_completion_task(task);
b39e625b 3247 rpc_put_task(task);
a49c3c77 3248 return status;
9512135d
TM		 3249out_free_calldata:
3250 kfree(calldata);
3251out:
b39e625b
TM		 3252 nfs4_put_open_state(state);
3253 nfs4_put_state_owner(sp);
9512135d 3254 return status;
1da177e4
LT		 3255}
3256
2b484297 3257static struct inode *
5bc2afc2
TM		 3258nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3259 int open_flags, struct iattr *attr, int *opened)
1da177e4 3260{
1da177e4 3261 struct nfs4_state *state;
aa9c2669
DQ		 3262 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3263
3264 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 3265
565277f6 3266 /* Protect against concurrent sillydeletes */
5bc2afc2 3267 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 3268
3269 nfs4_label_release_security(label);
3270
f46e0bd3
TM		 3271 if (IS_ERR(state))
3272 return ERR_CAST(state);
275bb307 3273 return state->inode;
1da177e4
LT		 3274}
3275
1185a552 3276static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 3277{
3278 if (ctx->state == NULL)
3279 return;
3280 if (is_sync)
643168c2 3281 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 3282 else
643168c2 3283 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 3284}
1da177e4 3285
b944dba3
TM		 3286#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3287#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
dff25ddb 3288#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_MODE_UMASK - 1UL)
b944dba3 3289
1da177e4
LT		 3290static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3291{
8c61282f 3292 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 3293 struct nfs4_server_caps_arg args = {
3294 .fhandle = fhandle,
8c61282f 3295 .bitmask = bitmask,
43652ad5 3296 };
1da177e4
LT		 3297 struct nfs4_server_caps_res res = {};
3298 struct rpc_message msg = {
3299 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 3300 .rpc_argp = &args,
1da177e4
LT		 3301 .rpc_resp = &res,
3302 };
3303 int status;
f4b23de3 3304 int i;
1da177e4 3305
8c61282f
KM		 3306 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3307 FATTR4_WORD0_FH_EXPIRE_TYPE |
3308 FATTR4_WORD0_LINK_SUPPORT |
3309 FATTR4_WORD0_SYMLINK_SUPPORT |
3310 FATTR4_WORD0_ACLSUPPORT;
3311 if (minorversion)
3312 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3313
7c513058 3314 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3315 if (status == 0) {
b944dba3 3316 /* Sanity check the server answers */
8c61282f 3317 switch (minorversion) {
b944dba3
TM		 3318 case 0:
3319 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3320 res.attr_bitmask[2] = 0;
3321 break;
3322 case 1:
3323 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3324 break;
3325 case 2:
3326 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3327 }
1da177e4 3328 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 3329 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3330 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3331 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3332 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 3333 NFS_CAP_CTIME|NFS_CAP_MTIME|
3334 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 3335 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3336 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 3337 server->caps |= NFS_CAP_ACLS;
3338 if (res.has_links != 0)
3339 server->caps |= NFS_CAP_HARDLINKS;
3340 if (res.has_symlinks != 0)
3341 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 3342 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3343 server->caps |= NFS_CAP_FILEID;
3344 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3345 server->caps |= NFS_CAP_MODE;
3346 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3347 server->caps |= NFS_CAP_NLINK;
3348 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3349 server->caps |= NFS_CAP_OWNER;
3350 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3351 server->caps |= NFS_CAP_OWNER_GROUP;
3352 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3353 server->caps |= NFS_CAP_ATIME;
3354 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3355 server->caps |= NFS_CAP_CTIME;
3356 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3357 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 3358#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3359 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3360 server->caps |= NFS_CAP_SECURITY_LABEL;
3361#endif
3362 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3363 sizeof(server->attr_bitmask));
b944dba3 3364 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 3365
a65318bf
TM		 3366 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3367 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3368 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 3369 server->cache_consistency_bitmask[2] = 0;
f4b23de3
TM		 3370
3371 /* Avoid a regression due to buggy server */
3372 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++)
3373 res.exclcreat_bitmask[i] &= res.attr_bitmask[i];
8c61282f
KM		 3374 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3375 sizeof(server->exclcreat_bitmask));
f4b23de3 3376
1da177e4 3377 server->acl_bitmask = res.acl_bitmask;
264e6351 3378 server->fh_expire_type = res.fh_expire_type;
1da177e4 3379 }
cccef3b9 3380
1da177e4
LT		 3381 return status;
3382}
3383
55a97593 3384int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 3385{
3386 struct nfs4_exception exception = { };
3387 int err;
3388 do {
3389 err = nfs4_handle_exception(server,
3390 _nfs4_server_capabilities(server, fhandle),
3391 &exception);
3392 } while (exception.retry);
3393 return err;
3394}
3395
3396static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3397 struct nfs_fsinfo *info)
3398{
aa9c2669 3399 u32 bitmask[3];
1da177e4 3400 struct nfs4_lookup_root_arg args = {
aa9c2669 3401 .bitmask = bitmask,
1da177e4
LT		 3402 };
3403 struct nfs4_lookup_res res = {
3404 .server = server,
0e574af1 3405 .fattr = info->fattr,
1da177e4
LT		 3406 .fh = fhandle,
3407 };
3408 struct rpc_message msg = {
3409 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3410 .rpc_argp = &args,
3411 .rpc_resp = &res,
3412 };
008f55d0 3413
aa9c2669
DQ		 3414 bitmask[0] = nfs4_fattr_bitmap[0];
3415 bitmask[1] = nfs4_fattr_bitmap[1];
3416 /*
3417 * Process the label in the upcoming getfattr
3418 */
3419 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3420
0e574af1 3421 nfs_fattr_init(info->fattr);
7c513058 3422 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3423}
3424
3425static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3426 struct nfs_fsinfo *info)
3427{
3428 struct nfs4_exception exception = { };
3429 int err;
3430 do {
fb8a5ba8 3431 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3432 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3433 switch (err) {
3434 case 0:
3435 case -NFS4ERR_WRONGSEC:
05e9cfb4 3436 goto out;
fb8a5ba8
BS		 3437 default:
3438 err = nfs4_handle_exception(server, err, &exception);
3439 }
1da177e4 3440 } while (exception.retry);
05e9cfb4 3441out:
1da177e4
LT		 3442 return err;
3443}
3444
8f70e95f
BS		 3445static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3446 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3447{
c2190661
TM		 3448 struct rpc_auth_create_args auth_args = {
3449 .pseudoflavor = flavor,
3450 };
8f70e95f 3451 struct rpc_auth *auth;
8f70e95f 3452
c2190661 3453 auth = rpcauth_create(&auth_args, server->client);
9df1336c
AS		 3454 if (IS_ERR(auth))
3455 return -EACCES;
3456 return nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3457}
3458
9a744ba3
CL		 3459/*
3460 * Retry pseudoroot lookup with various security flavors. We do this when:
3461 *
3462 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3463 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3464 *
3465 * Returns zero on success, or a negative NFS4ERR value, or a
3466 * negative errno value.
3467 */
801a16dc 3468static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3469 struct nfs_fsinfo *info)
1da177e4 3470{
9a744ba3
CL		 3471 /* Per 3530bis 15.33.5 */
3472 static const rpc_authflavor_t flav_array[] = {
3473 RPC_AUTH_GSS_KRB5P,
3474 RPC_AUTH_GSS_KRB5I,
3475 RPC_AUTH_GSS_KRB5,
c4eafe11 3476 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3477 RPC_AUTH_NULL,
3478 };
3479 int status = -EPERM;
3480 size_t i;
6a1a1e34 3481
4d4b69dd
WAA		 3482 if (server->auth_info.flavor_len > 0) {
3483 /* try each flavor specified by user */
3484 for (i = 0; i < server->auth_info.flavor_len; i++) {
3485 status = nfs4_lookup_root_sec(server, fhandle, info,
3486 server->auth_info.flavors[i]);
3487 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3488 continue;
3489 break;
3490 }
3491 } else {
3492 /* no flavors specified by user, try default list */
3493 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3494 status = nfs4_lookup_root_sec(server, fhandle, info,
3495 flav_array[i]);
3496 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3497 continue;
3498 break;
3499 }
8f70e95f 3500 }
9a744ba3 3501
fb8a5ba8
BS		 3502 /*
3503 * -EACCESS could mean that the user doesn't have correct permissions
3504 * to access the mount. It could also mean that we tried to mount
3505 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3506 * existing mount programs don't handle -EACCES very well so it should
3507 * be mapped to -EPERM instead.
3508 */
3509 if (status == -EACCES)
3510 status = -EPERM;
801a16dc
BS		 3511 return status;
3512}
3513
2ed4b95b
CL		 3514/**
3515 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3516 * @server: initialized nfs_server handle
3517 * @fhandle: we fill in the pseudo-fs root file handle
3518 * @info: we fill in an FSINFO struct
5e6b1990 3519 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3520 *
3521 * Returns zero on success, or a negative errno.
801a16dc 3522 */
3028eb2b 3523int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3524 struct nfs_fsinfo *info,
3525 bool auth_probe)
801a16dc 3526{
c7757074 3527 int status = 0;
2ed4b95b 3528
c7757074 3529 if (!auth_probe)
5e6b1990 3530 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3531
3532 if (auth_probe || status == NFS4ERR_WRONGSEC)
698c937b
TM		 3533 status = server->nfs_client->cl_mvops->find_root_sec(server,
3534 fhandle, info);
2ed4b95b 3535
1da177e4
LT		 3536 if (status == 0)
3537 status = nfs4_server_capabilities(server, fhandle);
3538 if (status == 0)
3539 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3540
c12e87f4 3541 return nfs4_map_errors(status);
1da177e4
LT		 3542}
3543
bae36241
BS		 3544static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3545 struct nfs_fsinfo *info)
3546{
3547 int error;
3548 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3549 struct nfs4_label *label = NULL;
bae36241
BS		 3550
3551 error = nfs4_server_capabilities(server, mntfh);
3552 if (error < 0) {
3553 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3554 return error;
3555 }
3556
14c43f76
DQ		 3557 label = nfs4_label_alloc(server, GFP_KERNEL);
3558 if (IS_ERR(label))
3559 return PTR_ERR(label);
3560
1775fd3e 3561 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3562 if (error < 0) {
3563 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3564 goto err_free_label;
bae36241
BS		 3565 }
3566
3567 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3568 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3569 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3570
14c43f76
DQ		 3571err_free_label:
3572 nfs4_label_free(label);
3573
bae36241
BS		 3574 return error;
3575}
3576
6b97fd3d
MN		 3577/*
3578 * Get locations and (maybe) other attributes of a referral.
3579 * Note that we'll actually follow the referral later when
3580 * we detect fsid mismatch in inode revalidation
3581 */
f05d147f
BS		 3582static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3583 const struct qstr *name, struct nfs_fattr *fattr,
3584 struct nfs_fh *fhandle)
6b97fd3d
MN		 3585{
3586 int status = -ENOMEM;
3587 struct page *page = NULL;
3588 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3589
3590 page = alloc_page(GFP_KERNEL);
3591 if (page == NULL)
3592 goto out;
3593 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3594 if (locations == NULL)
3595 goto out;
3596
f05d147f 3597 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3598 if (status != 0)
3599 goto out;
519ae255
CL		 3600
3601 /*
3602 * If the fsid didn't change, this is a migration event, not a
3603 * referral. Cause us to drop into the exception handler, which
3604 * will kick off migration recovery.
3605 */
6b97fd3d 3606 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3607 dprintk("%s: server did not return a different fsid for"
3608 " a referral at %s\n", __func__, name->name);
519ae255 3609 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3610 goto out;
3611 }
533eb461
AA		 3612 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3613 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3614
533eb461 3615 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3616 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3617 memset(fhandle, 0, sizeof(struct nfs_fh));
3618out:
3619 if (page)
3620 __free_page(page);
5d7ca35a 3621 kfree(locations);
6b97fd3d
MN		 3622 return status;
3623}
3624
1775fd3e
DQ		 3625static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3626 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3627{
3628 struct nfs4_getattr_arg args = {
3629 .fh = fhandle,
3630 .bitmask = server->attr_bitmask,
3631 };
3632 struct nfs4_getattr_res res = {
3633 .fattr = fattr,
1775fd3e 3634 .label = label,
1da177e4
LT		 3635 .server = server,
3636 };
3637 struct rpc_message msg = {
3638 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3639 .rpc_argp = &args,
3640 .rpc_resp = &res,
3641 };
aa9c2669
DQ		 3642
3643 args.bitmask = nfs4_bitmask(server, label);
3644
0e574af1 3645 nfs_fattr_init(fattr);
7c513058 3646 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3647}
3648
1775fd3e
DQ		 3649static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3650 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3651{
3652 struct nfs4_exception exception = { };
3653 int err;
3654 do {
b5f875a9
TM		 3655 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3656 trace_nfs4_getattr(server, fhandle, fattr, err);
3657 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3658 &exception);
3659 } while (exception.retry);
3660 return err;
3661}
3662
3663/*
3664 * The file is not closed if it is opened due to the a request to change
3665 * the size of the file. The open call will not be needed once the
3666 * VFS layer lookup-intents are implemented.
3667 *
3668 * Close is called when the inode is destroyed.
3669 * If we haven't opened the file for O_WRONLY, we
3670 * need to in the size_change case to obtain a stateid.
3671 *
3672 * Got race?
3673 * Because OPEN is always done by name in nfsv4, it is
3674 * possible that we opened a different file by the same
3675 * name. We can recognize this race condition, but we
3676 * can't do anything about it besides returning an error.
3677 *
3678 * This will be fixed with VFS changes (lookup-intent).
3679 */
3680static int
3681nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3682 struct iattr *sattr)
3683{
2b0143b5 3684 struct inode *inode = d_inode(dentry);
659bfcd6 3685 struct rpc_cred *cred = NULL;
29b59f94 3686 struct nfs_open_context *ctx = NULL;
14c43f76 3687 struct nfs4_label *label = NULL;
1da177e4
LT		 3688 int status;
3689
88ac815c
PT		 3690 if (pnfs_ld_layoutret_on_setattr(inode) &&
3691 sattr->ia_valid & ATTR_SIZE &&
3692 sattr->ia_size < i_size_read(inode))
24028672 3693 pnfs_commit_and_return_layout(inode);
8a1636c4 3694
0e574af1 3695 nfs_fattr_init(fattr);
1da177e4 3696
2669940d
AA		 3697 /* Deal with open(O_TRUNC) */
3698 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3699 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3700
3701 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3702 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3703 return 0;
3704
d530838b 3705 /* Search for an existing open(O_WRITE) file */
659bfcd6 3706 if (sattr->ia_valid & ATTR_FILE) {
659bfcd6
TM		 3707
3708 ctx = nfs_file_open_context(sattr->ia_file);
29b59f94 3709 if (ctx)
504e5189 3710 cred = ctx->cred;
659bfcd6 3711 }
08e9eac4 3712
14c43f76
DQ		 3713 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3714 if (IS_ERR(label))
3715 return PTR_ERR(label);
3716
29b59f94 3717 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label);
aa9c2669 3718 if (status == 0) {
f044636d 3719 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3720 nfs_setsecurity(inode, fattr, label);
3721 }
14c43f76 3722 nfs4_label_free(label);
1da177e4
LT		 3723 return status;
3724}
3725
0c2e53f1
TM		 3726static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3727 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3728 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3729{
0c2e53f1 3730 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3731 int status;
3732 struct nfs4_lookup_arg args = {
3733 .bitmask = server->attr_bitmask,
0c2e53f1 3734 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3735 .name = name,
3736 };
3737 struct nfs4_lookup_res res = {
3738 .server = server,
3739 .fattr = fattr,
aa9c2669 3740 .label = label,
2b3de441
DH		 3741 .fh = fhandle,
3742 };
3743 struct rpc_message msg = {
3744 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3745 .rpc_argp = &args,
3746 .rpc_resp = &res,
3747 };
3748
aa9c2669
DQ		 3749 args.bitmask = nfs4_bitmask(server, label);
3750
2b3de441
DH		 3751 nfs_fattr_init(fattr);
3752
1da177e4 3753 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3754 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3755 dprintk("NFS reply lookup: %d\n", status);
3756 return status;
3757}
3758
72de53ec 3759static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3760{
7ebb9315 3761 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3762 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3763 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3764 fattr->nlink = 2;
3765}
3766
72de53ec 3767static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
beffb8fe 3768 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3769 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3770{
3771 struct nfs4_exception exception = { };
72de53ec 3772 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3773 int err;
3774 do {
1775fd3e 3775 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3776 trace_nfs4_lookup(dir, name, err);
72de53ec 3777 switch (err) {
08ef7bd3 3778 case -NFS4ERR_BADNAME:
72de53ec
BS		 3779 err = -ENOENT;
3780 goto out;
0c2e53f1 3781 case -NFS4ERR_MOVED:
f05d147f 3782 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3783 if (err == -NFS4ERR_MOVED)
3784 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3785 goto out;
0c2e53f1 3786 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3787 err = -EPERM;
3788 if (client != *clnt)
3789 goto out;
66b06860 3790 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3791 if (IS_ERR(client))
3792 return PTR_ERR(client);
3793
3794 exception.retry = 1;
3795 break;
3796 default:
3797 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3798 }
1da177e4 3799 } while (exception.retry);
72de53ec
BS		 3800
3801out:
3802 if (err == 0)
3803 *clnt = client;
3804 else if (client != *clnt)
3805 rpc_shutdown_client(client);
3806
1da177e4
LT		 3807 return err;
3808}
3809
beffb8fe 3810static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1775fd3e
DQ		 3811 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3812 struct nfs4_label *label)
72de53ec
BS		 3813{
3814 int status;
3815 struct rpc_clnt *client = NFS_CLIENT(dir);
3816
1775fd3e 3817 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3818 if (client != NFS_CLIENT(dir)) {
3819 rpc_shutdown_client(client);
3820 nfs_fixup_secinfo_attributes(fattr);
3821 }
3822 return status;
3823}
3824
f05d147f 3825struct rpc_clnt *
beffb8fe 3826nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name,
f05d147f
BS		 3827 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3828{
b72888cb 3829 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3830 int status;
f05d147f 3831
1775fd3e 3832 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3833 if (status < 0)
f05d147f 3834 return ERR_PTR(status);
b72888cb 3835 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3836}
3837
5b5faaf6
JL		 3838static int _nfs4_proc_lookupp(struct inode *inode,
3839 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3840 struct nfs4_label *label)
3841{
3842 struct rpc_clnt *clnt = NFS_CLIENT(inode);
3843 struct nfs_server *server = NFS_SERVER(inode);
3844 int status;
3845 struct nfs4_lookupp_arg args = {
3846 .bitmask = server->attr_bitmask,
3847 .fh = NFS_FH(inode),
3848 };
3849 struct nfs4_lookupp_res res = {
3850 .server = server,
3851 .fattr = fattr,
3852 .label = label,
3853 .fh = fhandle,
3854 };
3855 struct rpc_message msg = {
3856 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP],
3857 .rpc_argp = &args,
3858 .rpc_resp = &res,
3859 };
3860
3861 args.bitmask = nfs4_bitmask(server, label);
3862
3863 nfs_fattr_init(fattr);
3864
3865 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino);
3866 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
3867 &res.seq_res, 0);
3868 dprintk("NFS reply lookupp: %d\n", status);
3869 return status;
3870}
3871
3872static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle,
3873 struct nfs_fattr *fattr, struct nfs4_label *label)
3874{
3875 struct nfs4_exception exception = { };
3876 int err;
3877 do {
3878 err = _nfs4_proc_lookupp(inode, fhandle, fattr, label);
3879 trace_nfs4_lookupp(inode, err);
3880 err = nfs4_handle_exception(NFS_SERVER(inode), err,
3881 &exception);
3882 } while (exception.retry);
3883 return err;
3884}
3885
1da177e4
LT		 3886static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3887{
76b32999 3888 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3889 struct nfs4_accessargs args = {
3890 .fh = NFS_FH(inode),
a4980e78 3891 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3892 };
3893 struct nfs4_accessres res = {
3894 .server = server,
1da177e4 3895 };
1da177e4
LT		 3896 struct rpc_message msg = {
3897 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3898 .rpc_argp = &args,
3899 .rpc_resp = &res,
3900 .rpc_cred = entry->cred,
3901 };
3902 int mode = entry->mask;
aa9c2669 3903 int status = 0;
1da177e4
LT		 3904
3905 /*
3906 * Determine which access bits we want to ask for...
3907 */
3908 if (mode & MAY_READ)
3909 args.access |= NFS4_ACCESS_READ;
3910 if (S_ISDIR(inode->i_mode)) {
3911 if (mode & MAY_WRITE)
3912 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3913 if (mode & MAY_EXEC)
3914 args.access |= NFS4_ACCESS_LOOKUP;
3915 } else {
3916 if (mode & MAY_WRITE)
3917 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3918 if (mode & MAY_EXEC)
3919 args.access |= NFS4_ACCESS_EXECUTE;
3920 }
c407d41a
TM		 3921
3922 res.fattr = nfs_alloc_fattr();
3923 if (res.fattr == NULL)
3924 return -ENOMEM;
3925
7c513058 3926 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3927 if (!status) {
6168f62c 3928 nfs_access_set_mask(entry, res.access);
c407d41a 3929 nfs_refresh_inode(inode, res.fattr);
1da177e4 3930 }
c407d41a 3931 nfs_free_fattr(res.fattr);
1da177e4
LT		 3932 return status;
3933}
3934
3935static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3936{
3937 struct nfs4_exception exception = { };
3938 int err;
3939 do {
c1578b76
TM		 3940 err = _nfs4_proc_access(inode, entry);
3941 trace_nfs4_access(inode, err);
3942 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3943 &exception);
3944 } while (exception.retry);
3945 return err;
3946}
3947
3948/*
3949 * TODO: For the time being, we don't try to get any attributes
3950 * along with any of the zero-copy operations READ, READDIR,
3951 * READLINK, WRITE.
3952 *
3953 * In the case of the first three, we want to put the GETATTR
3954 * after the read-type operation -- this is because it is hard
3955 * to predict the length of a GETATTR response in v4, and thus
3956 * align the READ data correctly. This means that the GETATTR
3957 * may end up partially falling into the page cache, and we should
3958 * shift it into the 'tail' of the xdr_buf before processing.
3959 * To do this efficiently, we need to know the total length
3960 * of data received, which doesn't seem to be available outside
3961 * of the RPC layer.
3962 *
3963 * In the case of WRITE, we also want to put the GETATTR after
3964 * the operation -- in this case because we want to make sure
140150db 3965 * we get the post-operation mtime and size.
1da177e4
LT		 3966 *
3967 * Both of these changes to the XDR layer would in fact be quite
3968 * minor, but I decided to leave them for a subsequent patch.
3969 */
3970static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3971 unsigned int pgbase, unsigned int pglen)
3972{
3973 struct nfs4_readlink args = {
3974 .fh = NFS_FH(inode),
3975 .pgbase = pgbase,
3976 .pglen = pglen,
3977 .pages = &page,
3978 };
f50c7000 3979 struct nfs4_readlink_res res;
1da177e4
LT		 3980 struct rpc_message msg = {
3981 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3982 .rpc_argp = &args,
f50c7000 3983 .rpc_resp = &res,
1da177e4
LT		 3984 };
3985
7c513058 3986 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3987}
3988
3989static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3990 unsigned int pgbase, unsigned int pglen)
3991{
3992 struct nfs4_exception exception = { };
3993 int err;
3994 do {
c1578b76
TM		 3995 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3996 trace_nfs4_readlink(inode, err);
3997 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3998 &exception);
3999 } while (exception.retry);
4000 return err;
4001}
4002
1da177e4 4003/*
8867fe58 4004 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 4005 */
1da177e4
LT		 4006static int
4007nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 4008 int flags)
1da177e4 4009{
dff25ddb 4010 struct nfs_server *server = NFS_SERVER(dir);
aa9c2669 4011 struct nfs4_label l, *ilabel = NULL;
8867fe58 4012 struct nfs_open_context *ctx;
1da177e4 4013 struct nfs4_state *state;
1da177e4
LT		 4014 int status = 0;
4015
532d4def 4016 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL);
8867fe58
MS		 4017 if (IS_ERR(ctx))
4018 return PTR_ERR(ctx);
4019
aa9c2669
DQ		 4020 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
4021
dff25ddb
AG		 4022 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4023 sattr->ia_mode &= ~current_umask();
c5c3fb5f 4024 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 4025 if (IS_ERR(state)) {
4026 status = PTR_ERR(state);
c0204fd2 4027 goto out;
1da177e4 4028 }
1da177e4 4029out:
aa9c2669 4030 nfs4_label_release_security(ilabel);
8867fe58 4031 put_nfs_open_context(ctx);
1da177e4
LT		 4032 return status;
4033}
4034
beffb8fe 4035static int _nfs4_proc_remove(struct inode *dir, const struct qstr *name)
1da177e4 4036{
16e42959 4037 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 4038 struct nfs_removeargs args = {
1da177e4 4039 .fh = NFS_FH(dir),
26fe5750 4040 .name = *name,
16e42959 4041 };
4fdc17b2 4042 struct nfs_removeres res = {
16e42959 4043 .server = server,
1da177e4 4044 };
1da177e4 4045 struct rpc_message msg = {
4fdc17b2
TM		 4046 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
4047 .rpc_argp = &args,
4048 .rpc_resp = &res,
1da177e4 4049 };
d3129ef6 4050 unsigned long timestamp = jiffies;
778d2817 4051 int status;
1da177e4 4052
7c513058 4053 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 4054 if (status == 0)
d3129ef6 4055 update_changeattr(dir, &res.cinfo, timestamp);
1da177e4
LT		 4056 return status;
4057}
4058
beffb8fe 4059static int nfs4_proc_remove(struct inode *dir, const struct qstr *name)
1da177e4
LT		 4060{
4061 struct nfs4_exception exception = { };
4062 int err;
4063 do {
078ea3df
TM		 4064 err = _nfs4_proc_remove(dir, name);
4065 trace_nfs4_remove(dir, name, err);
4066 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4067 &exception);
4068 } while (exception.retry);
4069 return err;
4070}
4071
e4eff1a6 4072static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 4073{
e4eff1a6
TM		 4074 struct nfs_server *server = NFS_SERVER(dir);
4075 struct nfs_removeargs *args = msg->rpc_argp;
4076 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 4077
e4eff1a6 4078 res->server = server;
1da177e4 4079 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 4080 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 4081
4082 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 4083}
4084
34e137cc
BS		 4085static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
4086{
42e1cca7 4087 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client,
d9afbd1b
TM		 4088 &data->args.seq_args,
4089 &data->res.seq_res,
4090 task);
1da177e4
LT		 4091}
4092
e4eff1a6 4093static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 4094{
078ea3df
TM		 4095 struct nfs_unlinkdata *data = task->tk_calldata;
4096 struct nfs_removeres *res = &data->res;
e4eff1a6 4097
14516c3a
TM		 4098 if (!nfs4_sequence_done(task, &res->seq_res))
4099 return 0;
8478eaa1
N		 4100 if (nfs4_async_handle_error(task, res->server, NULL,
4101 &data->timeout) == -EAGAIN)
e4eff1a6 4102 return 0;
c40d52fe 4103 if (task->tk_status == 0)
d3129ef6 4104 update_changeattr(dir, &res->cinfo, res->dir_attr->time_start);
e4eff1a6 4105 return 1;
1da177e4
LT		 4106}
4107
d3d4152a
JL		 4108static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
4109{
4110 struct nfs_server *server = NFS_SERVER(dir);
4111 struct nfs_renameargs *arg = msg->rpc_argp;
4112 struct nfs_renameres *res = msg->rpc_resp;
4113
4114 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 4115 res->server = server;
a9c92d6b 4116 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 4117}
4118
c6bfa1a1
BS		 4119static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
4120{
42e1cca7 4121 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client,
d9afbd1b
TM		 4122 &data->args.seq_args,
4123 &data->res.seq_res,
4124 task);
d3d4152a
JL		 4125}
4126
4127static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
4128 struct inode *new_dir)
4129{
fbc6f7c2
TM		 4130 struct nfs_renamedata *data = task->tk_calldata;
4131 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 4132
4133 if (!nfs4_sequence_done(task, &res->seq_res))
4134 return 0;
8478eaa1 4135 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 4136 return 0;
4137
c733c49c 4138 if (task->tk_status == 0) {
d3129ef6 4139 update_changeattr(old_dir, &res->old_cinfo, res->old_fattr->time_start);
c733c49c 4140 if (new_dir != old_dir)
d3129ef6 4141 update_changeattr(new_dir, &res->new_cinfo, res->new_fattr->time_start);
c733c49c 4142 }
d3d4152a
JL		 4143 return 1;
4144}
4145
beffb8fe 4146static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4 4147{
91ba2eee 4148 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 4149 struct nfs4_link_arg arg = {
4150 .fh = NFS_FH(inode),
4151 .dir_fh = NFS_FH(dir),
4152 .name = name,
91ba2eee
TM		 4153 .bitmask = server->attr_bitmask,
4154 };
91ba2eee
TM		 4155 struct nfs4_link_res res = {
4156 .server = server,
1775fd3e 4157 .label = NULL,
1da177e4 4158 };
1da177e4
LT		 4159 struct rpc_message msg = {
4160 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
4161 .rpc_argp = &arg,
91ba2eee 4162 .rpc_resp = &res,
1da177e4 4163 };
136f2627
TM		 4164 int status = -ENOMEM;
4165
4166 res.fattr = nfs_alloc_fattr();
778d2817 4167 if (res.fattr == NULL)
136f2627 4168 goto out;
1da177e4 4169
14c43f76
DQ		 4170 res.label = nfs4_label_alloc(server, GFP_KERNEL);
4171 if (IS_ERR(res.label)) {
4172 status = PTR_ERR(res.label);
4173 goto out;
4174 }
aa9c2669 4175 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 4176
7c513058 4177 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee 4178 if (!status) {
d3129ef6 4179 update_changeattr(dir, &res.cinfo, res.fattr->time_start);
aa9c2669
DQ		 4180 status = nfs_post_op_update_inode(inode, res.fattr);
4181 if (!status)
4182 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 4183 }
14c43f76
DQ		 4184
4185
4186 nfs4_label_free(res.label);
4187
136f2627 4188out:
136f2627 4189 nfs_free_fattr(res.fattr);
1da177e4
LT		 4190 return status;
4191}
4192
beffb8fe 4193static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4
LT		 4194{
4195 struct nfs4_exception exception = { };
4196 int err;
4197 do {
4198 err = nfs4_handle_exception(NFS_SERVER(inode),
4199 _nfs4_proc_link(inode, dir, name),
4200 &exception);
4201 } while (exception.retry);
4202 return err;
4203}
4204
57dc9a57
TM		 4205struct nfs4_createdata {
4206 struct rpc_message msg;
4207 struct nfs4_create_arg arg;
4208 struct nfs4_create_res res;
4209 struct nfs_fh fh;
4210 struct nfs_fattr fattr;
1775fd3e 4211 struct nfs4_label *label;
57dc9a57
TM		 4212};
4213
4214static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
beffb8fe 4215 const struct qstr *name, struct iattr *sattr, u32 ftype)
57dc9a57
TM		 4216{
4217 struct nfs4_createdata *data;
4218
4219 data = kzalloc(sizeof(*data), GFP_KERNEL);
4220 if (data != NULL) {
4221 struct nfs_server *server = NFS_SERVER(dir);
4222
14c43f76
DQ		 4223 data->label = nfs4_label_alloc(server, GFP_KERNEL);
4224 if (IS_ERR(data->label))
4225 goto out_free;
4226
57dc9a57
TM		 4227 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
4228 data->msg.rpc_argp = &data->arg;
4229 data->msg.rpc_resp = &data->res;
4230 data->arg.dir_fh = NFS_FH(dir);
4231 data->arg.server = server;
4232 data->arg.name = name;
4233 data->arg.attrs = sattr;
4234 data->arg.ftype = ftype;
aa9c2669 4235 data->arg.bitmask = nfs4_bitmask(server, data->label);
dff25ddb 4236 data->arg.umask = current_umask();
57dc9a57
TM		 4237 data->res.server = server;
4238 data->res.fh = &data->fh;
4239 data->res.fattr = &data->fattr;
1775fd3e 4240 data->res.label = data->label;
57dc9a57 4241 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 4242 }
4243 return data;
14c43f76
DQ		 4244out_free:
4245 kfree(data);
4246 return NULL;
57dc9a57
TM		 4247}
4248
4249static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
4250{
7c513058 4251 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 4252 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57 4253 if (status == 0) {
d3129ef6
TM		 4254 update_changeattr(dir, &data->res.dir_cinfo,
4255 data->res.fattr->time_start);
1775fd3e 4256 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 4257 }
4258 return status;
4259}
4260
4261static void nfs4_free_createdata(struct nfs4_createdata *data)
4262{
14c43f76 4263 nfs4_label_free(data->label);
57dc9a57
TM		 4264 kfree(data);
4265}
4266
4f390c15 4267static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 4268 struct page *page, unsigned int len, struct iattr *sattr,
4269 struct nfs4_label *label)
1da177e4 4270{
57dc9a57
TM		 4271 struct nfs4_createdata *data;
4272 int status = -ENAMETOOLONG;
1da177e4 4273
94a6d753 4274 if (len > NFS4_MAXPATHLEN)
57dc9a57 4275 goto out;
4f390c15 4276
57dc9a57
TM		 4277 status = -ENOMEM;
4278 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
4279 if (data == NULL)
4280 goto out;
4281
4282 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
4283 data->arg.u.symlink.pages = &page;
4284 data->arg.u.symlink.len = len;
1775fd3e 4285 data->arg.label = label;
1da177e4 4286
57dc9a57
TM		 4287 status = nfs4_do_create(dir, dentry, data);
4288
4289 nfs4_free_createdata(data);
4290out:
1da177e4
LT		 4291 return status;
4292}
4293
4f390c15 4294static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 4295 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 4296{
4297 struct nfs4_exception exception = { };
aa9c2669 4298 struct nfs4_label l, *label = NULL;
1da177e4 4299 int err;
aa9c2669
DQ		 4300
4301 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4302
1da177e4 4303 do {
078ea3df
TM		 4304 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4305 trace_nfs4_symlink(dir, &dentry->d_name, err);
4306 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4307 &exception);
4308 } while (exception.retry);
aa9c2669
DQ		 4309
4310 nfs4_label_release_security(label);
1da177e4
LT		 4311 return err;
4312}
4313
4314static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 4315 struct iattr *sattr, struct nfs4_label *label)
1da177e4 4316{
57dc9a57
TM		 4317 struct nfs4_createdata *data;
4318 int status = -ENOMEM;
1da177e4 4319
57dc9a57
TM		 4320 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4321 if (data == NULL)
4322 goto out;
4323
1775fd3e 4324 data->arg.label = label;
57dc9a57
TM		 4325 status = nfs4_do_create(dir, dentry, data);
4326
4327 nfs4_free_createdata(data);
4328out:
1da177e4
LT		 4329 return status;
4330}
4331
4332static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4333 struct iattr *sattr)
4334{
dff25ddb 4335 struct nfs_server *server = NFS_SERVER(dir);
1da177e4 4336 struct nfs4_exception exception = { };
aa9c2669 4337 struct nfs4_label l, *label = NULL;
1da177e4 4338 int err;
a8a5da99 4339
aa9c2669
DQ		 4340 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4341
dff25ddb
AG		 4342 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4343 sattr->ia_mode &= ~current_umask();
1da177e4 4344 do {
078ea3df
TM		 4345 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4346 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4347 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4348 &exception);
4349 } while (exception.retry);
aa9c2669
DQ		 4350 nfs4_label_release_security(label);
4351
1da177e4
LT		 4352 return err;
4353}
4354
4355static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
a7a3b1e9 4356 u64 cookie, struct page **pages, unsigned int count, bool plus)
1da177e4 4357{
2b0143b5 4358 struct inode *dir = d_inode(dentry);
1da177e4
LT		 4359 struct nfs4_readdir_arg args = {
4360 .fh = NFS_FH(dir),
56e4ebf8 4361 .pages = pages,
1da177e4
LT		 4362 .pgbase = 0,
4363 .count = count,
2b0143b5 4364 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 4365 .plus = plus,
1da177e4
LT		 4366 };
4367 struct nfs4_readdir_res res;
4368 struct rpc_message msg = {
4369 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4370 .rpc_argp = &args,
4371 .rpc_resp = &res,
4372 .rpc_cred = cred,
4373 };
4374 int status;
4375
6de1472f
AV		 4376 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4377 dentry,
eadf4598 4378 (unsigned long long)cookie);
c3f52af3 4379 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 4380 res.pgbase = args.pgbase;
7c513058 4381 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 4382 if (status >= 0) {
c3f52af3 4383 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 4384 status += args.pgbase;
4385 }
c4812998
TM		 4386
4387 nfs_invalidate_atime(dir);
4388
3110ff80 4389 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 4390 return status;
4391}
4392
4393static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
a7a3b1e9 4394 u64 cookie, struct page **pages, unsigned int count, bool plus)
1da177e4
LT		 4395{
4396 struct nfs4_exception exception = { };
4397 int err;
4398 do {
c1578b76
TM		 4399 err = _nfs4_proc_readdir(dentry, cred, cookie,
4400 pages, count, plus);
2b0143b5
DH		 4401 trace_nfs4_readdir(d_inode(dentry), err);
4402 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 4403 &exception);
4404 } while (exception.retry);
4405 return err;
4406}
4407
4408static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 4409 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 4410{
57dc9a57
TM		 4411 struct nfs4_createdata *data;
4412 int mode = sattr->ia_mode;
4413 int status = -ENOMEM;
1da177e4 4414
57dc9a57
TM		 4415 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4416 if (data == NULL)
4417 goto out;
4418
1da177e4 4419 if (S_ISFIFO(mode))
57dc9a57 4420 data->arg.ftype = NF4FIFO;
1da177e4 4421 else if (S_ISBLK(mode)) {
57dc9a57
TM		 4422 data->arg.ftype = NF4BLK;
4423 data->arg.u.device.specdata1 = MAJOR(rdev);
4424 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 4425 }
4426 else if (S_ISCHR(mode)) {
57dc9a57
TM		 4427 data->arg.ftype = NF4CHR;
4428 data->arg.u.device.specdata1 = MAJOR(rdev);
4429 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 4430 } else if (!S_ISSOCK(mode)) {
4431 status = -EINVAL;
4432 goto out_free;
1da177e4 4433 }
1775fd3e 4434
aa9c2669 4435 data->arg.label = label;
57dc9a57 4436 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 4437out_free:
57dc9a57
TM		 4438 nfs4_free_createdata(data);
4439out:
1da177e4
LT		 4440 return status;
4441}
4442
4443static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4444 struct iattr *sattr, dev_t rdev)
4445{
dff25ddb 4446 struct nfs_server *server = NFS_SERVER(dir);
1da177e4 4447 struct nfs4_exception exception = { };
aa9c2669 4448 struct nfs4_label l, *label = NULL;
1da177e4 4449 int err;
a8a5da99 4450
aa9c2669
DQ		 4451 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4452
dff25ddb
AG		 4453 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4454 sattr->ia_mode &= ~current_umask();
1da177e4 4455 do {
078ea3df
TM		 4456 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4457 trace_nfs4_mknod(dir, &dentry->d_name, err);
4458 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4459 &exception);
4460 } while (exception.retry);
aa9c2669
DQ		 4461
4462 nfs4_label_release_security(label);
4463
1da177e4
LT		 4464 return err;
4465}
4466
4467static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4468 struct nfs_fsstat *fsstat)
4469{
4470 struct nfs4_statfs_arg args = {
4471 .fh = fhandle,
4472 .bitmask = server->attr_bitmask,
4473 };
24ad148a
BH		 4474 struct nfs4_statfs_res res = {
4475 .fsstat = fsstat,
4476 };
1da177e4
LT		 4477 struct rpc_message msg = {
4478 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4479 .rpc_argp = &args,
24ad148a 4480 .rpc_resp = &res,
1da177e4
LT		 4481 };
4482
0e574af1 4483 nfs_fattr_init(fsstat->fattr);
7c513058 4484 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4485}
4486
4487static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4488{
4489 struct nfs4_exception exception = { };
4490 int err;
4491 do {
4492 err = nfs4_handle_exception(server,
4493 _nfs4_proc_statfs(server, fhandle, fsstat),
4494 &exception);
4495 } while (exception.retry);
4496 return err;
4497}
4498
4499static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4500 struct nfs_fsinfo *fsinfo)
4501{
4502 struct nfs4_fsinfo_arg args = {
4503 .fh = fhandle,
4504 .bitmask = server->attr_bitmask,
4505 };
3dda5e43
BH		 4506 struct nfs4_fsinfo_res res = {
4507 .fsinfo = fsinfo,
4508 };
1da177e4
LT		 4509 struct rpc_message msg = {
4510 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4511 .rpc_argp = &args,
3dda5e43 4512 .rpc_resp = &res,
1da177e4
LT		 4513 };
4514
7c513058 4515 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4516}
4517
4518static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4519{
4520 struct nfs4_exception exception = { };
83ca7f5a 4521 unsigned long now = jiffies;
1da177e4
LT		 4522 int err;
4523
4524 do {
83ca7f5a 4525 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4526 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a 4527 if (err == 0) {
fb10fb67
TM		 4528 nfs4_set_lease_period(server->nfs_client,
4529 fsinfo->lease_time * HZ,
4530 now);
83ca7f5a
CL		 4531 break;
4532 }
4533 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4534 } while (exception.retry);
4535 return err;
4536}
4537
4538static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4539{
e38eb650
BS		 4540 int error;
4541
0e574af1 4542 nfs_fattr_init(fsinfo->fattr);
e38eb650 4543 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4544 if (error == 0) {
4545 /* block layout checks this! */
4546 server->pnfs_blksize = fsinfo->blksize;
ca440c38 4547 set_pnfs_layoutdriver(server, fhandle, fsinfo);
dc182549 4548 }
e38eb650
BS		 4549
4550 return error;
1da177e4
LT		 4551}
4552
4553static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4554 struct nfs_pathconf *pathconf)
4555{
4556 struct nfs4_pathconf_arg args = {
4557 .fh = fhandle,
4558 .bitmask = server->attr_bitmask,
4559 };
d45b2989
BH		 4560 struct nfs4_pathconf_res res = {
4561 .pathconf = pathconf,
4562 };
1da177e4
LT		 4563 struct rpc_message msg = {
4564 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4565 .rpc_argp = &args,
d45b2989 4566 .rpc_resp = &res,
1da177e4
LT		 4567 };
4568
4569 /* None of the pathconf attributes are mandatory to implement */
4570 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4571 memset(pathconf, 0, sizeof(*pathconf));
4572 return 0;
4573 }
4574
0e574af1 4575 nfs_fattr_init(pathconf->fattr);
7c513058 4576 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4577}
4578
4579static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4580 struct nfs_pathconf *pathconf)
4581{
4582 struct nfs4_exception exception = { };
4583 int err;
4584
4585 do {
4586 err = nfs4_handle_exception(server,
4587 _nfs4_proc_pathconf(server, fhandle, pathconf),
4588 &exception);
4589 } while (exception.retry);
4590 return err;
4591}
4592
5521abfd 4593int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4594 const struct nfs_open_context *ctx,
4595 const struct nfs_lock_context *l_ctx,
4596 fmode_t fmode)
4597{
17393475 4598 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL);
9b206149
TM		 4599}
4600EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4601
5521abfd
TM		 4602static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4603 const struct nfs_open_context *ctx,
4604 const struct nfs_lock_context *l_ctx,
4605 fmode_t fmode)
4606{
4607 nfs4_stateid current_stateid;
4608
e1253be0
TM		 4609 /* If the current stateid represents a lost lock, then exit */
4610 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4611 return true;
5521abfd
TM		 4612 return nfs4_stateid_match(stateid, &current_stateid);
4613}
4614
4615static bool nfs4_error_stateid_expired(int err)
4616{
4617 switch (err) {
4618 case -NFS4ERR_DELEG_REVOKED:
4619 case -NFS4ERR_ADMIN_REVOKED:
4620 case -NFS4ERR_BAD_STATEID:
4621 case -NFS4ERR_STALE_STATEID:
4622 case -NFS4ERR_OLD_STATEID:
4623 case -NFS4ERR_OPENMODE:
4624 case -NFS4ERR_EXPIRED:
4625 return true;
4626 }
4627 return false;
4628}
4629
d45f60c6 4630static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4631{
d45f60c6 4632 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4633
d45f60c6 4634 trace_nfs4_read(hdr, task->tk_status);
9c27869d
TM		 4635 if (task->tk_status < 0) {
4636 struct nfs4_exception exception = {
4637 .inode = hdr->inode,
4638 .state = hdr->args.context->state,
4639 .stateid = &hdr->args.stateid,
4640 };
4641 task->tk_status = nfs4_async_handle_exception(task,
4642 server, task->tk_status, &exception);
4643 if (exception.retry) {
4644 rpc_restart_call_prepare(task);
4645 return -EAGAIN;
4646 }
1da177e4 4647 }
8850df99 4648
1da177e4 4649 if (task->tk_status > 0)
d45f60c6 4650 renew_lease(server, hdr->timestamp);
ec06c096 4651 return 0;
1da177e4
LT		 4652}
4653
5521abfd 4654static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4655 struct nfs_pgio_args *args)
5521abfd
TM		 4656{
4657
4658 if (!nfs4_error_stateid_expired(task->tk_status) ||
4659 nfs4_stateid_is_current(&args->stateid,
4660 args->context,
4661 args->lock_context,
4662 FMODE_READ))
4663 return false;
4664 rpc_restart_call_prepare(task);
4665 return true;
4666}
4667
d45f60c6 4668static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4669{
4670
4671 dprintk("--> %s\n", __func__);
4672
d45f60c6 4673 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4674 return -EAGAIN;
d45f60c6 4675 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4676 return -EAGAIN;
bfc505de
TM		 4677 if (task->tk_status > 0)
4678 nfs_invalidate_atime(hdr->inode);
d45f60c6
WAA		 4679 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4680 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4681}
4682
d45f60c6
WAA		 4683static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4684 struct rpc_message *msg)
1da177e4 4685{
d45f60c6 4686 hdr->timestamp = jiffies;
ca857cc1
TM		 4687 if (!hdr->pgio_done_cb)
4688 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4689 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4690 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4691}
4692
d45f60c6
WAA		 4693static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4694 struct nfs_pgio_header *hdr)
ea7c3303 4695{
42e1cca7 4696 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client,
d45f60c6
WAA		 4697 &hdr->args.seq_args,
4698 &hdr->res.seq_res,
9b206149 4699 task))
ef1820f9 4700 return 0;
d45f60c6
WAA		 4701 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4702 hdr->args.lock_context,
fbe77c30 4703 hdr->rw_mode) == -EIO)
ef1820f9 4704 return -EIO;
d45f60c6 4705 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4706 return -EIO;
4707 return 0;
1da177e4
LT		 4708}
4709
d45f60c6
WAA		 4710static int nfs4_write_done_cb(struct rpc_task *task,
4711 struct nfs_pgio_header *hdr)
1da177e4 4712{
d45f60c6 4713 struct inode *inode = hdr->inode;
8478eaa1 4714
d45f60c6 4715 trace_nfs4_write(hdr, task->tk_status);
9c27869d
TM		 4716 if (task->tk_status < 0) {
4717 struct nfs4_exception exception = {
4718 .inode = hdr->inode,
4719 .state = hdr->args.context->state,
4720 .stateid = &hdr->args.stateid,
4721 };
4722 task->tk_status = nfs4_async_handle_exception(task,
4723 NFS_SERVER(inode), task->tk_status,
4724 &exception);
4725 if (exception.retry) {
4726 rpc_restart_call_prepare(task);
4727 return -EAGAIN;
4728 }
1da177e4 4729 }
4f9838c7 4730 if (task->tk_status >= 0) {
d45f60c6 4731 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4732 nfs_writeback_update_inode(hdr);
4f9838c7 4733 }
788e7a89 4734 return 0;
1da177e4
LT		 4735}
4736
5521abfd 4737static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4738 struct nfs_pgio_args *args)
5521abfd
TM		 4739{
4740
4741 if (!nfs4_error_stateid_expired(task->tk_status) ||
4742 nfs4_stateid_is_current(&args->stateid,
4743 args->context,
4744 args->lock_context,
4745 FMODE_WRITE))
4746 return false;
4747 rpc_restart_call_prepare(task);
4748 return true;
4749}
4750
d45f60c6 4751static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4752{
d45f60c6 4753 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4754 return -EAGAIN;
d45f60c6 4755 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4756 return -EAGAIN;
d45f60c6
WAA		 4757 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4758 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4759}
4760
5a37f851 4761static
d45f60c6 4762bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4763{
5a37f851 4764 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4765 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4766 return false;
4767 /* Otherwise, request attributes if and only if we don't hold
4768 * a delegation
4769 */
011e2a7f 4770 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4771}
a69aef14 4772
d45f60c6
WAA		 4773static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4774 struct rpc_message *msg)
1da177e4 4775{
d45f60c6 4776 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4777
d45f60c6
WAA		 4778 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4779 hdr->args.bitmask = NULL;
4780 hdr->res.fattr = NULL;
7ffd1064 4781 } else
d45f60c6 4782 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4783
d45f60c6
WAA		 4784 if (!hdr->pgio_done_cb)
4785 hdr->pgio_done_cb = nfs4_write_done_cb;
4786 hdr->res.server = server;
4787 hdr->timestamp = jiffies;
1da177e4 4788
bdc7f021 4789 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4790 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4791}
4792
0b7c0153 4793static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4794{
42e1cca7 4795 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client,
d9afbd1b
TM		 4796 &data->args.seq_args,
4797 &data->res.seq_res,
4798 task);
1da177e4
LT		 4799}
4800
0b7c0153 4801static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4802{
1da177e4 4803 struct inode *inode = data->inode;
14516c3a 4804
cc668ab3 4805 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4806 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4807 NULL, NULL) == -EAGAIN) {
d00c5d43 4808 rpc_restart_call_prepare(task);
788e7a89 4809 return -EAGAIN;
1da177e4 4810 }
788e7a89 4811 return 0;
1da177e4
LT		 4812}
4813
0b7c0153 4814static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4815{
4816 if (!nfs4_sequence_done(task, &data->res.seq_res))
4817 return -EAGAIN;
0b7c0153 4818 return data->commit_done_cb(task, data);
5f452431
FI		 4819}
4820
0b7c0153 4821static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4822{
788e7a89 4823 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4824
0b7c0153
FI		 4825 if (data->commit_done_cb == NULL)
4826 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4827 data->res.server = server;
bdc7f021 4828 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4829 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4830}
4831
9bc4e3ca
CL		 4832struct nfs4_renewdata {
4833 struct nfs_client *client;
4834 unsigned long timestamp;
4835};
4836
1da177e4
LT		 4837/*
4838 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4839 * standalone procedure for queueing an asynchronous RENEW.
4840 */
9bc4e3ca 4841static void nfs4_renew_release(void *calldata)
dc96aef9 4842{
9bc4e3ca
CL		 4843 struct nfs4_renewdata *data = calldata;
4844 struct nfs_client *clp = data->client;
dc96aef9 4845
0851de06
AB		 4846 if (atomic_read(&clp->cl_count) > 1)
4847 nfs4_schedule_state_renewal(clp);
4848 nfs_put_client(clp);
9bc4e3ca 4849 kfree(data);
dc96aef9
AB		 4850}
4851
9bc4e3ca 4852static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4853{
9bc4e3ca
CL		 4854 struct nfs4_renewdata *data = calldata;
4855 struct nfs_client *clp = data->client;
4856 unsigned long timestamp = data->timestamp;
1da177e4 4857
c6d01c6f 4858 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4859 switch (task->tk_status) {
4860 case 0:
4861 break;
4862 case -NFS4ERR_LEASE_MOVED:
4863 nfs4_schedule_lease_moved_recovery(clp);
4864 break;
4865 default:
95baa25c 4866 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4867 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4868 return;
4869 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4870 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4871 return;
4872 }
4873 nfs4_schedule_path_down_recovery(clp);
1da177e4 4874 }
452e9352 4875 do_renew_lease(clp, timestamp);
1da177e4
LT		 4876}
4877
963d8fe5
TM		 4878static const struct rpc_call_ops nfs4_renew_ops = {
4879 .rpc_call_done = nfs4_renew_done,
dc96aef9 4880 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4881};
4882
2f60ea6b 4883static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4884{
4885 struct rpc_message msg = {
4886 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4887 .rpc_argp = clp,
b4454fe1 4888 .rpc_cred = cred,
1da177e4 4889 };
9bc4e3ca 4890 struct nfs4_renewdata *data;
1da177e4 4891
2f60ea6b
TM		 4892 if (renew_flags == 0)
4893 return 0;
0851de06
AB		 4894 if (!atomic_inc_not_zero(&clp->cl_count))
4895 return -EIO;
b569ad34 4896 data = kmalloc(sizeof(*data), GFP_NOFS);
5c737cb2
DW		 4897 if (data == NULL) {
4898 nfs_put_client(clp);
9bc4e3ca 4899 return -ENOMEM;
5c737cb2 4900 }
9bc4e3ca
CL		 4901 data->client = clp;
4902 data->timestamp = jiffies;
bc7a05ca 4903 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4904 &nfs4_renew_ops, data);
1da177e4
LT		 4905}
4906
8534d4ec 4907static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4908{
4909 struct rpc_message msg = {
4910 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4911 .rpc_argp = clp,
b4454fe1 4912 .rpc_cred = cred,
1da177e4
LT		 4913 };
4914 unsigned long now = jiffies;
4915 int status;
4916
bc7a05ca 4917 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4918 if (status < 0)
4919 return status;
452e9352 4920 do_renew_lease(clp, now);
1da177e4
LT		 4921 return 0;
4922}
4923
aa1870af
BF		 4924static inline int nfs4_server_supports_acls(struct nfs_server *server)
4925{
7dd7d959 4926 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4927}
4928
21f498c2
TM		 4929/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4930 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4931 * the stack.
4932 */
21f498c2 4933#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4934
e9e3d724 4935static int buf_to_pages_noslab(const void *buf, size_t buflen,
8fbcf237 4936 struct page **pages)
e9e3d724
NH		 4937{
4938 struct page *newpage, **spages;
4939 int rc = 0;
4940 size_t len;
4941 spages = pages;
4942
4943 do {
21f498c2 4944 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4945 newpage = alloc_page(GFP_KERNEL);
4946
4947 if (newpage == NULL)
4948 goto unwind;
4949 memcpy(page_address(newpage), buf, len);
d9b67e1e
AS		 4950 buf += len;
4951 buflen -= len;
e9e3d724
NH		 4952 *pages++ = newpage;
4953 rc++;
4954 } while (buflen != 0);
4955
4956 return rc;
4957
4958unwind:
4959 for(; rc > 0; rc--)
4960 __free_page(spages[rc-1]);
4961 return -ENOMEM;
4962}
4963
e50a1c2e
BF		 4964struct nfs4_cached_acl {
4965 int cached;
4966 size_t len;
3e9d4154 4967 char data[0];
e50a1c2e
BF		 4968};
4969
4970static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4971{
4972 struct nfs_inode *nfsi = NFS_I(inode);
4973
4974 spin_lock(&inode->i_lock);
4975 kfree(nfsi->nfs4_acl);
4976 nfsi->nfs4_acl = acl;
4977 spin_unlock(&inode->i_lock);
4978}
4979
4980static void nfs4_zap_acl_attr(struct inode *inode)
4981{
4982 nfs4_set_cached_acl(inode, NULL);
4983}
4984
4985static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4986{
4987 struct nfs_inode *nfsi = NFS_I(inode);
4988 struct nfs4_cached_acl *acl;
4989 int ret = -ENOENT;
4990
4991 spin_lock(&inode->i_lock);
4992 acl = nfsi->nfs4_acl;
4993 if (acl == NULL)
4994 goto out;
4995 if (buf == NULL) /* user is just asking for length */
4996 goto out_len;
4997 if (acl->cached == 0)
4998 goto out;
4999 ret = -ERANGE; /* see getxattr(2) man page */
5000 if (acl->len > buflen)
5001 goto out;
5002 memcpy(buf, acl->data, acl->len);
5003out_len:
5004 ret = acl->len;
5005out:
5006 spin_unlock(&inode->i_lock);
5007 return ret;
5008}
5009
5794d21e 5010static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 5011{
5012 struct nfs4_cached_acl *acl;
b291f1b1 5013 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 5014
1f1ea6c2 5015 if (buflen <= PAGE_SIZE) {
b291f1b1 5016 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 5017 if (acl == NULL)
5018 goto out;
5019 acl->cached = 1;
5794d21e 5020 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 5021 } else {
5022 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
5023 if (acl == NULL)
5024 goto out;
5025 acl->cached = 0;
5026 }
5027 acl->len = acl_len;
5028out:
5029 nfs4_set_cached_acl(inode, acl);
5030}
5031
bf118a34
AA		 5032/*
5033 * The getxattr API returns the required buffer length when called with a
5034 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
5035 * the required buf. On a NULL buf, we send a page of data to the server
5036 * guessing that the ACL request can be serviced by a page. If so, we cache
5037 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
5038 * the cache. If not so, we throw away the page, and cache the required
5039 * length. The next getxattr call will then produce another round trip to
5040 * the server, this time with the input buf of the required size.
5041 */
16b4289c 5042static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 5043{
ed92d8c1 5044 struct page *pages[NFS4ACL_MAXPAGES + 1] = {NULL, };
aa1870af
BF		 5045 struct nfs_getaclargs args = {
5046 .fh = NFS_FH(inode),
5047 .acl_pages = pages,
5048 .acl_len = buflen,
5049 };
663c79b3
BH		 5050 struct nfs_getaclres res = {
5051 .acl_len = buflen,
5052 };
aa1870af
BF		 5053 struct rpc_message msg = {
5054 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
5055 .rpc_argp = &args,
663c79b3 5056 .rpc_resp = &res,
aa1870af 5057 };
ed92d8c1 5058 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1;
21f498c2 5059 int ret = -ENOMEM, i;
aa1870af 5060
21f498c2
TM		 5061 if (npages > ARRAY_SIZE(pages))
5062 return -ERANGE;
5a006899 5063
bf118a34
AA		 5064 for (i = 0; i < npages; i++) {
5065 pages[i] = alloc_page(GFP_KERNEL);
5066 if (!pages[i])
5067 goto out_free;
e50a1c2e 5068 }
5a006899
SP		 5069
5070 /* for decoding across pages */
5071 res.acl_scratch = alloc_page(GFP_KERNEL);
5072 if (!res.acl_scratch)
5073 goto out_free;
5074
bf118a34 5075 args.acl_len = npages * PAGE_SIZE;
5a006899 5076
de040bec 5077 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 5078 __func__, buf, buflen, npages, args.acl_len);
5079 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
5080 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 5081 if (ret)
5082 goto out_free;
bf118a34 5083
1f1ea6c2
TM		 5084 /* Handle the case where the passed-in buffer is too short */
5085 if (res.acl_flags & NFS4_ACL_TRUNC) {
5086 /* Did the user only issue a request for the acl length? */
5087 if (buf == NULL)
5088 goto out_ok;
e50a1c2e 5089 ret = -ERANGE;
1f1ea6c2 5090 goto out_free;
e50a1c2e 5091 }
1f1ea6c2 5092 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 5093 if (buf) {
5094 if (res.acl_len > buflen) {
5095 ret = -ERANGE;
5096 goto out_free;
5097 }
1f1ea6c2 5098 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 5099 }
1f1ea6c2
TM		 5100out_ok:
5101 ret = res.acl_len;
e50a1c2e 5102out_free:
bf118a34
AA		 5103 for (i = 0; i < npages; i++)
5104 if (pages[i])
5105 __free_page(pages[i]);
331818f1
TM		 5106 if (res.acl_scratch)
5107 __free_page(res.acl_scratch);
aa1870af
BF		 5108 return ret;
5109}
5110
16b4289c
TM		 5111static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5112{
5113 struct nfs4_exception exception = { };
5114 ssize_t ret;
5115 do {
5116 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 5117 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 5118 if (ret >= 0)
5119 break;
5120 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
5121 } while (exception.retry);
5122 return ret;
5123}
5124
e50a1c2e
BF		 5125static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
5126{
5127 struct nfs_server *server = NFS_SERVER(inode);
5128 int ret;
5129
5130 if (!nfs4_server_supports_acls(server))
5131 return -EOPNOTSUPP;
5132 ret = nfs_revalidate_inode(server, inode);
5133 if (ret < 0)
5134 return ret;
08a22b39
AK		 5135 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
5136 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 5137 ret = nfs4_read_cached_acl(inode, buf, buflen);
5138 if (ret != -ENOENT)
bf118a34
AA		 5139 /* -ENOENT is returned if there is no ACL or if there is an ACL
5140 * but no cached acl data, just the acl length */
e50a1c2e
BF		 5141 return ret;
5142 return nfs4_get_acl_uncached(inode, buf, buflen);
5143}
5144
16b4289c 5145static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 5146{
5147 struct nfs_server *server = NFS_SERVER(inode);
5148 struct page *pages[NFS4ACL_MAXPAGES];
5149 struct nfs_setaclargs arg = {
5150 .fh = NFS_FH(inode),
5151 .acl_pages = pages,
5152 .acl_len = buflen,
5153 };
73c403a9 5154 struct nfs_setaclres res;
4b580ee3
BF		 5155 struct rpc_message msg = {
5156 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
5157 .rpc_argp = &arg,
73c403a9 5158 .rpc_resp = &res,
4b580ee3 5159 };
21f498c2 5160 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 5161 int ret, i;
4b580ee3
BF		 5162
5163 if (!nfs4_server_supports_acls(server))
5164 return -EOPNOTSUPP;
21f498c2
TM		 5165 if (npages > ARRAY_SIZE(pages))
5166 return -ERANGE;
8fbcf237 5167 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
e9e3d724
NH		 5168 if (i < 0)
5169 return i;
57ec14c5 5170 nfs4_inode_return_delegation(inode);
7c513058 5171 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 5172
5173 /*
5174 * Free each page after tx, so the only ref left is
5175 * held by the network stack
5176 */
5177 for (; i > 0; i--)
5178 put_page(pages[i-1]);
5179
08a22b39
AK		 5180 /*
5181 * Acl update can result in inode attribute update.
5182 * so mark the attribute cache invalid.
5183 */
5184 spin_lock(&inode->i_lock);
5185 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
5186 spin_unlock(&inode->i_lock);
f41f7418
TM		 5187 nfs_access_zap_cache(inode);
5188 nfs_zap_acl_cache(inode);
4b580ee3
BF		 5189 return ret;
5190}
5191
16b4289c
TM		 5192static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5193{
5194 struct nfs4_exception exception = { };
5195 int err;
5196 do {
c1578b76
TM		 5197 err = __nfs4_proc_set_acl(inode, buf, buflen);
5198 trace_nfs4_set_acl(inode, err);
5199 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 5200 &exception);
5201 } while (exception.retry);
5202 return err;
5203}
5204
aa9c2669
DQ		 5205#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5206static int _nfs4_get_security_label(struct inode *inode, void *buf,
5207 size_t buflen)
5208{
5209 struct nfs_server *server = NFS_SERVER(inode);
5210 struct nfs_fattr fattr;
5211 struct nfs4_label label = {0, 0, buflen, buf};
5212
5213 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 5214 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 5215 .fh = NFS_FH(inode),
5216 .bitmask = bitmask,
5217 };
5218 struct nfs4_getattr_res res = {
5219 .fattr = &fattr,
5220 .label = &label,
5221 .server = server,
5222 };
5223 struct rpc_message msg = {
5224 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 5225 .rpc_argp = &arg,
aa9c2669
DQ		 5226 .rpc_resp = &res,
5227 };
5228 int ret;
5229
5230 nfs_fattr_init(&fattr);
5231
fcb63a9b 5232 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 5233 if (ret)
5234 return ret;
5235 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
5236 return -ENOENT;
5237 if (buflen < label.len)
5238 return -ERANGE;
5239 return 0;
5240}
5241
5242static int nfs4_get_security_label(struct inode *inode, void *buf,
5243 size_t buflen)
5244{
5245 struct nfs4_exception exception = { };
5246 int err;
5247
5248 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5249 return -EOPNOTSUPP;
5250
5251 do {
c1578b76
TM		 5252 err = _nfs4_get_security_label(inode, buf, buflen);
5253 trace_nfs4_get_security_label(inode, err);
5254 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5255 &exception);
5256 } while (exception.retry);
5257 return err;
5258}
5259
5260static int _nfs4_do_set_security_label(struct inode *inode,
5261 struct nfs4_label *ilabel,
5262 struct nfs_fattr *fattr,
5263 struct nfs4_label *olabel)
5264{
5265
5266 struct iattr sattr = {0};
5267 struct nfs_server *server = NFS_SERVER(inode);
5268 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 5269 struct nfs_setattrargs arg = {
d9b67e1e
AS		 5270 .fh = NFS_FH(inode),
5271 .iap = &sattr,
aa9c2669
DQ		 5272 .server = server,
5273 .bitmask = bitmask,
5274 .label = ilabel,
5275 };
5276 struct nfs_setattrres res = {
5277 .fattr = fattr,
5278 .label = olabel,
5279 .server = server,
5280 };
5281 struct rpc_message msg = {
d9b67e1e
AS		 5282 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
5283 .rpc_argp = &arg,
5284 .rpc_resp = &res,
aa9c2669
DQ		 5285 };
5286 int status;
5287
12207f69 5288 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 5289
12207f69 5290 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 5291 if (status)
5292 dprintk("%s failed: %d\n", __func__, status);
5293
5294 return status;
5295}
5296
5297static int nfs4_do_set_security_label(struct inode *inode,
5298 struct nfs4_label *ilabel,
5299 struct nfs_fattr *fattr,
5300 struct nfs4_label *olabel)
5301{
5302 struct nfs4_exception exception = { };
5303 int err;
5304
5305 do {
c1578b76
TM		 5306 err = _nfs4_do_set_security_label(inode, ilabel,
5307 fattr, olabel);
5308 trace_nfs4_set_security_label(inode, err);
5309 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5310 &exception);
5311 } while (exception.retry);
5312 return err;
5313}
5314
5315static int
59301226 5316nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
aa9c2669
DQ		 5317{
5318 struct nfs4_label ilabel, *olabel = NULL;
5319 struct nfs_fattr fattr;
5320 struct rpc_cred *cred;
aa9c2669
DQ		 5321 int status;
5322
5323 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5324 return -EOPNOTSUPP;
5325
5326 nfs_fattr_init(&fattr);
5327
5328 ilabel.pi = 0;
5329 ilabel.lfs = 0;
5330 ilabel.label = (char *)buf;
5331 ilabel.len = buflen;
5332
5333 cred = rpc_lookup_cred();
5334 if (IS_ERR(cred))
5335 return PTR_ERR(cred);
5336
5337 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5338 if (IS_ERR(olabel)) {
5339 status = -PTR_ERR(olabel);
5340 goto out;
5341 }
5342
5343 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5344 if (status == 0)
5345 nfs_setsecurity(inode, &fattr, olabel);
5346
5347 nfs4_label_free(olabel);
5348out:
5349 put_rpccred(cred);
5350 return status;
5351}
5352#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5353
5354
f092075d
CL		 5355static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5356 nfs4_verifier *bootverf)
cd93710e
CL		 5357{
5358 __be32 verf[2];
5359
2c820d9a
CL		 5360 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5361 /* An impossible timestamp guarantees this value
5362 * will never match a generated boot time. */
2f86e091
DD		 5363 verf[0] = cpu_to_be32(U32_MAX);
5364 verf[1] = cpu_to_be32(U32_MAX);
2c820d9a 5365 } else {
f092075d 5366 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
2f86e091
DD		 5367 u64 ns = ktime_to_ns(nn->boot_time);
5368
5369 verf[0] = cpu_to_be32(ns >> 32);
5370 verf[1] = cpu_to_be32(ns);
2c820d9a 5371 }
cd93710e
CL		 5372 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5373}
5374
a3192688
JL		 5375static int
5376nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 5377{
a3192688
JL		 5378 size_t len;
5379 char *str;
e984a55a 5380
ceb3a16c 5381 if (clp->cl_owner_id != NULL)
a3192688 5382 return 0;
4a3e5779 5383
a3192688 5384 rcu_read_lock();
4a70316c 5385 len = 14 + strlen(clp->cl_ipaddr) + 1 +
a3192688
JL		 5386 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5387 1 +
5388 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5389 1;
5390 rcu_read_unlock();
5391
5392 if (len > NFS4_OPAQUE_LIMIT + 1)
5393 return -EINVAL;
5394
5395 /*
5396 * Since this string is allocated at mount time, and held until the
5397 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5398 * about a memory-reclaim deadlock.
5399 */
5400 str = kmalloc(len, GFP_KERNEL);
5401 if (!str)
5402 return -ENOMEM;
ceb3a16c 5403
e984a55a 5404 rcu_read_lock();
f2dd436e 5405 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
a3192688
JL		 5406 clp->cl_ipaddr,
5407 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5408 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5409 rcu_read_unlock();
a3192688 5410
a3192688
JL		 5411 clp->cl_owner_id = str;
5412 return 0;
e984a55a
CL		 5413}
5414
873e3851
JL		 5415static int
5416nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5417{
873e3851
JL		 5418 size_t len;
5419 char *str;
5420
5421 len = 10 + 10 + 1 + 10 + 1 +
5422 strlen(nfs4_client_id_uniquifier) + 1 +
5423 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5424
5425 if (len > NFS4_OPAQUE_LIMIT + 1)
5426 return -EINVAL;
5427
5428 /*
5429 * Since this string is allocated at mount time, and held until the
5430 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5431 * about a memory-reclaim deadlock.
5432 */
5433 str = kmalloc(len, GFP_KERNEL);
5434 if (!str)
5435 return -ENOMEM;
5436
f2dd436e 5437 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
873e3851
JL		 5438 clp->rpc_ops->version, clp->cl_minorversion,
5439 nfs4_client_id_uniquifier,
5440 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5441 clp->cl_owner_id = str;
5442 return 0;
5443}
5444
5445static int
5446nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5447{
873e3851
JL		 5448 size_t len;
5449 char *str;
ceb3a16c
TM		 5450
5451 if (clp->cl_owner_id != NULL)
873e3851 5452 return 0;
6f2ea7f2
CL		 5453
5454 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5455 return nfs4_init_uniquifier_client_string(clp);
5456
5457 len = 10 + 10 + 1 + 10 + 1 +
5458 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5459
5460 if (len > NFS4_OPAQUE_LIMIT + 1)
5461 return -EINVAL;
5462
5463 /*
5464 * Since this string is allocated at mount time, and held until the
5465 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5466 * about a memory-reclaim deadlock.
5467 */
5468 str = kmalloc(len, GFP_KERNEL);
5469 if (!str)
5470 return -ENOMEM;
5471
f2dd436e 5472 scnprintf(str, len, "Linux NFSv%u.%u %s",
873e3851
JL		 5473 clp->rpc_ops->version, clp->cl_minorversion,
5474 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5475 clp->cl_owner_id = str;
5476 return 0;
e984a55a
CL		 5477}
5478
706cb8db
CL		 5479/*
5480 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5481 * services. Advertise one based on the address family of the
5482 * clientaddr.
5483 */
5484static unsigned int
5485nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5486{
5487 if (strchr(clp->cl_ipaddr, ':') != NULL)
5488 return scnprintf(buf, len, "tcp6");
5489 else
5490 return scnprintf(buf, len, "tcp");
5491}
5492
f11b2a1c
JL		 5493static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5494{
5495 struct nfs4_setclientid *sc = calldata;
5496
5497 if (task->tk_status == 0)
5498 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5499}
5500
5501static const struct rpc_call_ops nfs4_setclientid_ops = {
5502 .rpc_call_done = nfs4_setclientid_done,
5503};
5504
6bbb4ae8
CL		 5505/**
5506 * nfs4_proc_setclientid - Negotiate client ID
5507 * @clp: state data structure
5508 * @program: RPC program for NFSv4 callback service
5509 * @port: IP port number for NFS4 callback service
5510 * @cred: RPC credential to use for this call
5511 * @res: where to place the result
5512 *
5513 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5514 */
bb8b27e5
TM		 5515int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5516 unsigned short port, struct rpc_cred *cred,
5517 struct nfs4_setclientid_res *res)
1da177e4
LT		 5518{
5519 nfs4_verifier sc_verifier;
5520 struct nfs4_setclientid setclientid = {
5521 .sc_verifier = &sc_verifier,
5522 .sc_prog = program,
3a6bb738 5523 .sc_clnt = clp,
1da177e4
LT		 5524 };
5525 struct rpc_message msg = {
5526 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5527 .rpc_argp = &setclientid,
bb8b27e5 5528 .rpc_resp = res,
286d7d6a 5529 .rpc_cred = cred,
1da177e4 5530 };
f11b2a1c
JL		 5531 struct rpc_task *task;
5532 struct rpc_task_setup task_setup_data = {
5533 .rpc_client = clp->cl_rpcclient,
5534 .rpc_message = &msg,
5535 .callback_ops = &nfs4_setclientid_ops,
5536 .callback_data = &setclientid,
5537 .flags = RPC_TASK_TIMEOUT,
5538 };
6bbb4ae8 5539 int status;
1da177e4 5540
de734831 5541 /* nfs_client_id4 */
f092075d 5542 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5543
5544 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5545 status = nfs4_init_uniform_client_string(clp);
5546 else
a3192688 5547 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5548
5549 if (status)
5550 goto out;
3a6bb738 5551
de734831 5552 /* cb_client4 */
706cb8db
CL		 5553 setclientid.sc_netid_len =
5554 nfs4_init_callback_netid(clp,
5555 setclientid.sc_netid,
5556 sizeof(setclientid.sc_netid));
de734831 5557 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5558 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5559 clp->cl_ipaddr, port >> 8, port & 255);
5560
3a6bb738 5561 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5562 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5563 clp->cl_owner_id);
f11b2a1c
JL		 5564 task = rpc_run_task(&task_setup_data);
5565 if (IS_ERR(task)) {
5566 status = PTR_ERR(task);
5567 goto out;
5568 }
5569 status = task->tk_status;
5570 if (setclientid.sc_cred) {
5571 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5572 put_rpccred(setclientid.sc_cred);
5573 }
5574 rpc_put_task(task);
5575out:
c6d01c6f 5576 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5577 dprintk("NFS reply setclientid: %d\n", status);
5578 return status;
1da177e4
LT		 5579}
5580
6bbb4ae8
CL		 5581/**
5582 * nfs4_proc_setclientid_confirm - Confirm client ID
5583 * @clp: state data structure
5584 * @res: result of a previous SETCLIENTID
5585 * @cred: RPC credential to use for this call
5586 *
5587 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5588 */
fd954ae1 5589int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5590 struct nfs4_setclientid_res *arg,
5591 struct rpc_cred *cred)
1da177e4 5592{
1da177e4
LT		 5593 struct rpc_message msg = {
5594 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5595 .rpc_argp = arg,
286d7d6a 5596 .rpc_cred = cred,
1da177e4 5597 };
1da177e4
LT		 5598 int status;
5599
6bbb4ae8
CL		 5600 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5601 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5602 clp->cl_clientid);
1bd714f2 5603 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5604 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5605 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5606 return status;
5607}
5608
fe650407
TM		 5609struct nfs4_delegreturndata {
5610 struct nfs4_delegreturnargs args;
fa178f29 5611 struct nfs4_delegreturnres res;
fe650407
TM		 5612 struct nfs_fh fh;
5613 nfs4_stateid stateid;
26e976a8 5614 unsigned long timestamp;
586f1c39
TM		 5615 struct {
5616 struct nfs4_layoutreturn_args arg;
5617 struct nfs4_layoutreturn_res res;
4d796d75 5618 struct nfs4_xdr_opaque_data ld_private;
586f1c39
TM		 5619 u32 roc_barrier;
5620 bool roc;
5621 } lr;
fa178f29 5622 struct nfs_fattr fattr;
fe650407 5623 int rpc_status;
039b756a 5624 struct inode *inode;
fe650407
TM		 5625};
5626
fe650407
TM		 5627static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5628{
5629 struct nfs4_delegreturndata *data = calldata;
938e1010 5630
14516c3a
TM		 5631 if (!nfs4_sequence_done(task, &data->res.seq_res))
5632 return;
938e1010 5633
ca8acf8d 5634 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
586f1c39
TM		 5635
5636 /* Handle Layoutreturn errors */
5637 if (data->args.lr_args && task->tk_status != 0) {
5638 switch(data->res.lr_ret) {
5639 default:
5640 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
5641 break;
5642 case 0:
5643 data->args.lr_args = NULL;
5644 data->res.lr_res = NULL;
5645 break;
5646 case -NFS4ERR_ADMIN_REVOKED:
5647 case -NFS4ERR_DELEG_REVOKED:
5648 case -NFS4ERR_EXPIRED:
5649 case -NFS4ERR_BAD_STATEID:
5650 case -NFS4ERR_OLD_STATEID:
5651 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
5652 case -NFS4ERR_WRONG_CRED:
5653 data->args.lr_args = NULL;
5654 data->res.lr_res = NULL;
5655 data->res.lr_ret = 0;
5656 rpc_restart_call_prepare(task);
5657 return;
5658 }
5659 }
5660
79708861 5661 switch (task->tk_status) {
79708861 5662 case 0:
fa178f29 5663 renew_lease(data->res.server, data->timestamp);
23ea44c2 5664 break;
c97cf606
TM		 5665 case -NFS4ERR_ADMIN_REVOKED:
5666 case -NFS4ERR_DELEG_REVOKED:
26d36301
TM		 5667 case -NFS4ERR_EXPIRED:
5668 nfs4_free_revoked_stateid(data->res.server,
5669 data->args.stateid,
5670 task->tk_msg.rpc_cred);
c97cf606
TM		 5671 case -NFS4ERR_BAD_STATEID:
5672 case -NFS4ERR_OLD_STATEID:
5673 case -NFS4ERR_STALE_STATEID:
c97cf606
TM		 5674 task->tk_status = 0;
5675 break;
8ac2b422
TM		 5676 case -NFS4ERR_ACCESS:
5677 if (data->args.bitmask) {
5678 data->args.bitmask = NULL;
5679 data->res.fattr = NULL;
5680 task->tk_status = 0;
5681 rpc_restart_call_prepare(task);
5682 return;
5683 }
79708861 5684 default:
8478eaa1
N		 5685 if (nfs4_async_handle_error(task, data->res.server,
5686 NULL, NULL) == -EAGAIN) {
d00c5d43 5687 rpc_restart_call_prepare(task);
79708861
RL		 5688 return;
5689 }
5690 }
5691 data->rpc_status = task->tk_status;
fe650407
TM		 5692}
5693
5694static void nfs4_delegreturn_release(void *calldata)
5695{
039b756a 5696 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5697 struct inode *inode = data->inode;
039b756a 5698
ea7c38fe 5699 if (inode) {
586f1c39 5700 if (data->lr.roc)
1c5bd76d
TM		 5701 pnfs_roc_release(&data->lr.arg, &data->lr.res,
5702 data->res.lr_ret);
0bc2c9b4 5703 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
ea7c38fe
TM		 5704 nfs_iput_and_deactive(inode);
5705 }
fe650407
TM		 5706 kfree(calldata);
5707}
5708
938e1010
AA		 5709static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5710{
5711 struct nfs4_delegreturndata *d_data;
5712
5713 d_data = (struct nfs4_delegreturndata *)data;
5714
1c5bd76d 5715 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task))
500d701f
PT		 5716 return;
5717
42e1cca7 5718 nfs4_setup_sequence(d_data->res.server->nfs_client,
d9afbd1b
TM		 5719 &d_data->args.seq_args,
5720 &d_data->res.seq_res,
5721 task);
938e1010 5722}
938e1010 5723
c8d149f3 5724static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5725 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5726 .rpc_call_done = nfs4_delegreturn_done,
5727 .rpc_release = nfs4_delegreturn_release,
5728};
5729
e6f81075 5730static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5731{
5732 struct nfs4_delegreturndata *data;
fa178f29 5733 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5734 struct rpc_task *task;
5138fde0
TM		 5735 struct rpc_message msg = {
5736 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5737 .rpc_cred = cred,
5738 };
c970aa85
TM		 5739 struct rpc_task_setup task_setup_data = {
5740 .rpc_client = server->client,
5138fde0 5741 .rpc_message = &msg,
c970aa85
TM		 5742 .callback_ops = &nfs4_delegreturn_ops,
5743 .flags = RPC_TASK_ASYNC,
5744 };
e6f81075 5745 int status = 0;
fe650407 5746
8535b2be 5747 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5748 if (data == NULL)
5749 return -ENOMEM;
a9c92d6b 5750 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
99ade3c7
AE		 5751
5752 nfs4_state_protect(server->nfs_client,
5753 NFS_SP4_MACH_CRED_CLEANUP,
5754 &task_setup_data.rpc_client, &msg);
5755
fe650407
TM		 5756 data->args.fhandle = &data->fh;
5757 data->args.stateid = &data->stateid;
9e907fec 5758 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5759 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5760 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5761 data->res.fattr = &data->fattr;
5762 data->res.server = server;
586f1c39 5763 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
4d796d75 5764 data->lr.arg.ld_private = &data->lr.ld_private;
5138fde0 5765 nfs_fattr_init(data->res.fattr);
26e976a8 5766 data->timestamp = jiffies;
fe650407 5767 data->rpc_status = 0;
53e6fc86 5768 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, cred);
ea7c38fe 5769 data->inode = nfs_igrab_and_active(inode);
1c5bd76d 5770 if (data->inode) {
1c5bd76d
TM		 5771 if (data->lr.roc) {
5772 data->args.lr_args = &data->lr.arg;
5773 data->res.lr_res = &data->lr.res;
5774 }
53e6fc86
TM		 5775 } else if (data->lr.roc) {
5776 pnfs_roc_release(&data->lr.arg, &data->lr.res, 0);
5777 data->lr.roc = false;
1c5bd76d 5778 }
fe650407 5779
c970aa85 5780 task_setup_data.callback_data = data;
1174dd1f
TM		 5781 msg.rpc_argp = &data->args;
5782 msg.rpc_resp = &data->res;
c970aa85 5783 task = rpc_run_task(&task_setup_data);
7a1218a2 5784 if (IS_ERR(task))
fe650407 5785 return PTR_ERR(task);
e6f81075
TM		 5786 if (!issync)
5787 goto out;
820bf85c 5788 status = rpc_wait_for_completion_task(task);
e6f81075
TM		 5789 if (status != 0)
5790 goto out;
5791 status = data->rpc_status;
e6f81075 5792out:
e6b3c4db 5793 rpc_put_task(task);
fe650407 5794 return status;
1da177e4
LT		 5795}
5796
e6f81075 5797int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5798{
5799 struct nfs_server *server = NFS_SERVER(inode);
5800 struct nfs4_exception exception = { };
5801 int err;
5802 do {
e6f81075 5803 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
48c9579a 5804 trace_nfs4_delegreturn(inode, stateid, err);
1da177e4
LT		 5805 switch (err) {
5806 case -NFS4ERR_STALE_STATEID:
5807 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5808 case 0:
5809 return 0;
5810 }
5811 err = nfs4_handle_exception(server, err, &exception);
5812 } while (exception.retry);
5813 return err;
5814}
5815
1da177e4
LT		 5816static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5817{
5818 struct inode *inode = state->inode;
5819 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5820 struct nfs_client *clp = server->nfs_client;
911d1aaf 5821 struct nfs_lockt_args arg = {
1da177e4 5822 .fh = NFS_FH(inode),
911d1aaf 5823 .fl = request,
1da177e4 5824 };
911d1aaf
TM		 5825 struct nfs_lockt_res res = {
5826 .denied = request,
1da177e4
LT		 5827 };
5828 struct rpc_message msg = {
5829 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
d9b67e1e
AS		 5830 .rpc_argp = &arg,
5831 .rpc_resp = &res,
1da177e4
LT		 5832 .rpc_cred = state->owner->so_cred,
5833 };
1da177e4
LT		 5834 struct nfs4_lock_state *lsp;
5835 int status;
5836
911d1aaf 5837 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5838 status = nfs4_set_lock_state(state, request);
5839 if (status != 0)
5840 goto out;
5841 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5842 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5843 arg.lock_owner.s_dev = server->s_dev;
7c513058 5844 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5845 switch (status) {
5846 case 0:
5847 request->fl_type = F_UNLCK;
5848 break;
5849 case -NFS4ERR_DENIED:
5850 status = 0;
1da177e4 5851 }
70cc6487 5852 request->fl_ops->fl_release_private(request);
a6f951dd 5853 request->fl_ops = NULL;
8d0a8a9d 5854out:
1da177e4
LT		 5855 return status;
5856}
5857
5858static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5859{
5860 struct nfs4_exception exception = { };
5861 int err;
5862
5863 do {
d1b748a5
TM		 5864 err = _nfs4_proc_getlk(state, cmd, request);
5865 trace_nfs4_get_lock(request, state, cmd, err);
5866 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5867 &exception);
5868 } while (exception.retry);
5869 return err;
5870}
5871
faf5f49c 5872struct nfs4_unlockdata {
911d1aaf
TM		 5873 struct nfs_locku_args arg;
5874 struct nfs_locku_res res;
faf5f49c
TM		 5875 struct nfs4_lock_state *lsp;
5876 struct nfs_open_context *ctx;
f30cb757 5877 struct nfs_lock_context *l_ctx;
911d1aaf 5878 struct file_lock fl;
516285eb 5879 struct nfs_server *server;
26e976a8 5880 unsigned long timestamp;
faf5f49c
TM		 5881};
5882
911d1aaf
TM		 5883static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5884 struct nfs_open_context *ctx,
5885 struct nfs4_lock_state *lsp,
5886 struct nfs_seqid *seqid)
5887{
5888 struct nfs4_unlockdata *p;
5889 struct inode *inode = lsp->ls_state->inode;
5890
8535b2be 5891 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5892 if (p == NULL)
5893 return NULL;
5894 p->arg.fh = NFS_FH(inode);
5895 p->arg.fl = &p->fl;
5896 p->arg.seqid = seqid;
c1d51931 5897 p->res.seqid = seqid;
911d1aaf
TM		 5898 p->lsp = lsp;
5899 atomic_inc(&lsp->ls_count);
5900 /* Ensure we don't close file until we're done freeing locks! */
5901 p->ctx = get_nfs_open_context(ctx);
f30cb757 5902 p->l_ctx = nfs_get_lock_context(ctx);
911d1aaf
TM		 5903 memcpy(&p->fl, fl, sizeof(p->fl));
5904 p->server = NFS_SERVER(inode);
5905 return p;
5906}
5907
06f814a3 5908static void nfs4_locku_release_calldata(void *data)
faf5f49c 5909{
963d8fe5 5910 struct nfs4_unlockdata *calldata = data;
911d1aaf 5911 nfs_free_seqid(calldata->arg.seqid);
06f814a3 5912 nfs4_put_lock_state(calldata->lsp);
f30cb757 5913 nfs_put_lock_context(calldata->l_ctx);
06f814a3
TM		 5914 put_nfs_open_context(calldata->ctx);
5915 kfree(calldata);
faf5f49c
TM		 5916}
5917
963d8fe5 5918static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5919{
963d8fe5 5920 struct nfs4_unlockdata *calldata = data;
faf5f49c 5921
14516c3a
TM		 5922 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5923 return;
faf5f49c
TM		 5924 switch (task->tk_status) {
5925 case 0:
26e976a8 5926 renew_lease(calldata->server, calldata->timestamp);
75575ddf 5927 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 5928 if (nfs4_update_lock_stateid(calldata->lsp,
5929 &calldata->res.stateid))
5930 break;
26d36301
TM		 5931 case -NFS4ERR_ADMIN_REVOKED:
5932 case -NFS4ERR_EXPIRED:
5933 nfs4_free_revoked_stateid(calldata->server,
5934 &calldata->arg.stateid,
5935 task->tk_msg.rpc_cred);
9e33bed5
TM		 5936 case -NFS4ERR_BAD_STATEID:
5937 case -NFS4ERR_OLD_STATEID:
faf5f49c 5938 case -NFS4ERR_STALE_STATEID:
425c1d4e
TM		 5939 if (!nfs4_stateid_match(&calldata->arg.stateid,
5940 &calldata->lsp->ls_stateid))
5941 rpc_restart_call_prepare(task);
faf5f49c
TM		 5942 break;
5943 default:
8478eaa1
N		 5944 if (nfs4_async_handle_error(task, calldata->server,
5945 NULL, NULL) == -EAGAIN)
d00c5d43 5946 rpc_restart_call_prepare(task);
faf5f49c 5947 }
2b1bc308 5948 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5949}
5950
4ce70ada 5951static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5952{
4ce70ada 5953 struct nfs4_unlockdata *calldata = data;
faf5f49c 5954
f30cb757
BC		 5955 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) &&
5956 nfs_async_iocounter_wait(task, calldata->l_ctx))
5957 return;
5958
911d1aaf 5959 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5960 goto out_wait;
425c1d4e 5961 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5962 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5963 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5964 goto out_no_action;
faf5f49c 5965 }
26e976a8 5966 calldata->timestamp = jiffies;
42e1cca7 5967 if (nfs4_setup_sequence(calldata->server->nfs_client,
a893693c 5968 &calldata->arg.seq_args,
2240a9e2
TM		 5969 &calldata->res.seq_res,
5970 task) != 0)
5971 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5972 return;
5973out_no_action:
5974 task->tk_action = NULL;
5975out_wait:
5976 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5977}
5978
963d8fe5 5979static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5980 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5981 .rpc_call_done = nfs4_locku_done,
06f814a3 5982 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5983};
5984
a5d16a4d
TM		 5985static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5986 struct nfs_open_context *ctx,
5987 struct nfs4_lock_state *lsp,
5988 struct nfs_seqid *seqid)
5989{
5990 struct nfs4_unlockdata *data;
5138fde0
TM		 5991 struct rpc_message msg = {
5992 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5993 .rpc_cred = ctx->cred,
5994 };
c970aa85
TM		 5995 struct rpc_task_setup task_setup_data = {
5996 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5997 .rpc_message = &msg,
c970aa85 5998 .callback_ops = &nfs4_locku_ops,
101070ca 5999 .workqueue = nfsiod_workqueue,
c970aa85
TM		 6000 .flags = RPC_TASK_ASYNC,
6001 };
a5d16a4d 6002
fa940720
WAA		 6003 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
6004 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
6005
137d6aca
FF		 6006 /* Ensure this is an unlock - when canceling a lock, the
6007 * canceled lock is passed in, and it won't be an unlock.
6008 */
6009 fl->fl_type = F_UNLCK;
f30cb757
BC		 6010 if (fl->fl_flags & FL_CLOSE)
6011 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags);
137d6aca 6012
a5d16a4d
TM		 6013 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
6014 if (data == NULL) {
6015 nfs_free_seqid(seqid);
6016 return ERR_PTR(-ENOMEM);
6017 }
6018
a9c92d6b 6019 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 6020 msg.rpc_argp = &data->arg;
6021 msg.rpc_resp = &data->res;
c970aa85
TM		 6022 task_setup_data.callback_data = data;
6023 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 6024}
6025
faf5f49c
TM		 6026static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
6027{
65b62a29
TM		 6028 struct inode *inode = state->inode;
6029 struct nfs4_state_owner *sp = state->owner;
6030 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 6031 struct nfs_seqid *seqid;
1da177e4 6032 struct nfs4_lock_state *lsp;
06f814a3 6033 struct rpc_task *task;
b4019c0e 6034 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 6035 int status = 0;
536ff0f8 6036 unsigned char fl_flags = request->fl_flags;
faf5f49c 6037
8d0a8a9d 6038 status = nfs4_set_lock_state(state, request);
9b073574
TM		 6039 /* Unlock _before_ we do the RPC call */
6040 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 6041 /* Exclude nfs_delegation_claim_locks() */
6042 mutex_lock(&sp->so_delegreturn_mutex);
6043 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 6044 down_read(&nfsi->rwsem);
75575ddf 6045 if (locks_lock_inode_wait(inode, request) == -ENOENT) {
19e03c57 6046 up_read(&nfsi->rwsem);
65b62a29 6047 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 6048 goto out;
19e03c57
TM		 6049 }
6050 up_read(&nfsi->rwsem);
65b62a29 6051 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 6052 if (status != 0)
9b073574
TM		 6053 goto out;
6054 /* Is this a delegated lock? */
8d0a8a9d 6055 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 6056 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
6057 goto out;
b4019c0e
TM		 6058 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
6059 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 6060 status = -ENOMEM;
badc76dd 6061 if (IS_ERR(seqid))
9b073574 6062 goto out;
cd3758e3 6063 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 6064 status = PTR_ERR(task);
6065 if (IS_ERR(task))
9b073574 6066 goto out;
820bf85c 6067 status = rpc_wait_for_completion_task(task);
e6b3c4db 6068 rpc_put_task(task);
9b073574 6069out:
536ff0f8 6070 request->fl_flags = fl_flags;
d1b748a5 6071 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 6072 return status;
6073}
6074
a5d16a4d
TM		 6075struct nfs4_lockdata {
6076 struct nfs_lock_args arg;
6077 struct nfs_lock_res res;
6078 struct nfs4_lock_state *lsp;
6079 struct nfs_open_context *ctx;
6080 struct file_lock fl;
26e976a8 6081 unsigned long timestamp;
a5d16a4d
TM		 6082 int rpc_status;
6083 int cancelled;
66179efe 6084 struct nfs_server *server;
a5d16a4d
TM		 6085};
6086
6087static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 6088 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
6089 gfp_t gfp_mask)
1da177e4 6090{
a5d16a4d
TM		 6091 struct nfs4_lockdata *p;
6092 struct inode *inode = lsp->ls_state->inode;
1da177e4 6093 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 6094 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 6095
8535b2be 6096 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 6097 if (p == NULL)
6098 return NULL;
6099
6100 p->arg.fh = NFS_FH(inode);
6101 p->arg.fl = &p->fl;
8535b2be 6102 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 6103 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 6104 goto out_free;
b4019c0e
TM		 6105 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
6106 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 6107 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 6108 goto out_free_seqid;
7539bbab 6109 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 6110 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 6111 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 6112 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 6113 p->lsp = lsp;
66179efe 6114 p->server = server;
a5d16a4d
TM		 6115 atomic_inc(&lsp->ls_count);
6116 p->ctx = get_nfs_open_context(ctx);
6117 memcpy(&p->fl, fl, sizeof(p->fl));
6118 return p;
2f74c0a0
TM		 6119out_free_seqid:
6120 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 6121out_free:
6122 kfree(p);
6123 return NULL;
6124}
6125
6126static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
6127{
6128 struct nfs4_lockdata *data = calldata;
6129 struct nfs4_state *state = data->lsp->ls_state;
06735b34 6130
3110ff80 6131 dprintk("%s: begin!\n", __func__);
2f74c0a0 6132 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 6133 goto out_wait;
a5d16a4d 6134 /* Do we need to do an open_to_lock_owner? */
6b447539 6135 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 6136 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 6137 goto out_release_lock_seqid;
8fe72bac 6138 }
425c1d4e
TM		 6139 nfs4_stateid_copy(&data->arg.open_stateid,
6140 &state->open_stateid);
a5d16a4d 6141 data->arg.new_lock_owner = 1;
c1d51931 6142 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 6143 } else {
2f74c0a0 6144 data->arg.new_lock_owner = 0;
425c1d4e
TM		 6145 nfs4_stateid_copy(&data->arg.lock_stateid,
6146 &data->lsp->ls_stateid);
6147 }
5d422301
TM		 6148 if (!nfs4_valid_open_stateid(state)) {
6149 data->rpc_status = -EBADF;
6150 task->tk_action = NULL;
6151 goto out_release_open_seqid;
6152 }
26e976a8 6153 data->timestamp = jiffies;
42e1cca7 6154 if (nfs4_setup_sequence(data->server->nfs_client,
035168ab 6155 &data->arg.seq_args,
2240a9e2 6156 &data->res.seq_res,
d9afbd1b 6157 task) == 0)
66179efe 6158 return;
5d422301 6159out_release_open_seqid:
2240a9e2
TM		 6160 nfs_release_seqid(data->arg.open_seqid);
6161out_release_lock_seqid:
6162 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 6163out_wait:
6164 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 6165 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 6166}
6167
a5d16a4d
TM		 6168static void nfs4_lock_done(struct rpc_task *task, void *calldata)
6169{
6170 struct nfs4_lockdata *data = calldata;
39071e6f 6171 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 6172
3110ff80 6173 dprintk("%s: begin!\n", __func__);
a5d16a4d 6174
14516c3a
TM		 6175 if (!nfs4_sequence_done(task, &data->res.seq_res))
6176 return;
66179efe 6177
a5d16a4d 6178 data->rpc_status = task->tk_status;
425c1d4e
TM		 6179 switch (task->tk_status) {
6180 case 0:
2b0143b5 6181 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 6182 data->timestamp);
c69899a1
TM		 6183 if (data->arg.new_lock) {
6184 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
75575ddf 6185 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) {
c69899a1
TM		 6186 rpc_restart_call_prepare(task);
6187 break;
6188 }
6189 }
39071e6f
TM		 6190 if (data->arg.new_lock_owner != 0) {
6191 nfs_confirm_seqid(&lsp->ls_seqid, 0);
6192 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
6193 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6194 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
6195 rpc_restart_call_prepare(task);
425c1d4e
TM		 6196 break;
6197 case -NFS4ERR_BAD_STATEID:
6198 case -NFS4ERR_OLD_STATEID:
6199 case -NFS4ERR_STALE_STATEID:
6200 case -NFS4ERR_EXPIRED:
6201 if (data->arg.new_lock_owner != 0) {
6202 if (!nfs4_stateid_match(&data->arg.open_stateid,
6203 &lsp->ls_state->open_stateid))
6204 rpc_restart_call_prepare(task);
6205 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
6206 &lsp->ls_stateid))
6207 rpc_restart_call_prepare(task);
a5d16a4d 6208 }
3110ff80 6209 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 6210}
6211
6212static void nfs4_lock_release(void *calldata)
6213{
6214 struct nfs4_lockdata *data = calldata;
6215
3110ff80 6216 dprintk("%s: begin!\n", __func__);
2f74c0a0 6217 nfs_free_seqid(data->arg.open_seqid);
a7a3b1e9 6218 if (data->cancelled) {
a5d16a4d
TM		 6219 struct rpc_task *task;
6220 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
6221 data->arg.lock_seqid);
6222 if (!IS_ERR(task))
bf294b41 6223 rpc_put_task_async(task);
3110ff80 6224 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 6225 } else
6226 nfs_free_seqid(data->arg.lock_seqid);
6227 nfs4_put_lock_state(data->lsp);
6228 put_nfs_open_context(data->ctx);
6229 kfree(data);
3110ff80 6230 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 6231}
6232
6233static const struct rpc_call_ops nfs4_lock_ops = {
6234 .rpc_call_prepare = nfs4_lock_prepare,
6235 .rpc_call_done = nfs4_lock_done,
6236 .rpc_release = nfs4_lock_release,
6237};
6238
2bee72a6
TM		 6239static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
6240{
2bee72a6
TM		 6241 switch (error) {
6242 case -NFS4ERR_ADMIN_REVOKED:
d7f3e4bf 6243 case -NFS4ERR_EXPIRED:
2bee72a6 6244 case -NFS4ERR_BAD_STATEID:
ecac799a 6245 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 6246 if (new_lock_owner != 0 ||
795a88c9 6247 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 6248 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 6249 break;
6250 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 6251 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a 6252 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 6253 };
6254}
6255
afe6c27c 6256static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 6257{
6258 struct nfs4_lockdata *data;
6259 struct rpc_task *task;
5138fde0
TM		 6260 struct rpc_message msg = {
6261 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
6262 .rpc_cred = state->owner->so_cred,
6263 };
c970aa85
TM		 6264 struct rpc_task_setup task_setup_data = {
6265 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 6266 .rpc_message = &msg,
c970aa85 6267 .callback_ops = &nfs4_lock_ops,
101070ca 6268 .workqueue = nfsiod_workqueue,
c970aa85
TM		 6269 .flags = RPC_TASK_ASYNC,
6270 };
a5d16a4d
TM		 6271 int ret;
6272
3110ff80 6273 dprintk("%s: begin!\n", __func__);
cd3758e3 6274 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 6275 fl->fl_u.nfs4_fl.owner,
6276 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 6277 if (data == NULL)
6278 return -ENOMEM;
6279 if (IS_SETLKW(cmd))
6280 data->arg.block = 1;
a9c92d6b 6281 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 6282 msg.rpc_argp = &data->arg;
6283 msg.rpc_resp = &data->res;
c970aa85 6284 task_setup_data.callback_data = data;
8fe72bac
TM		 6285 if (recovery_type > NFS_LOCK_NEW) {
6286 if (recovery_type == NFS_LOCK_RECLAIM)
6287 data->arg.reclaim = NFS_LOCK_RECLAIM;
6288 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 6289 } else
6290 data->arg.new_lock = 1;
c970aa85 6291 task = rpc_run_task(&task_setup_data);
7a1218a2 6292 if (IS_ERR(task))
a5d16a4d 6293 return PTR_ERR(task);
820bf85c 6294 ret = rpc_wait_for_completion_task(task);
a5d16a4d
TM		 6295 if (ret == 0) {
6296 ret = data->rpc_status;
2bee72a6
TM		 6297 if (ret)
6298 nfs4_handle_setlk_error(data->server, data->lsp,
6299 data->arg.new_lock_owner, ret);
a5d16a4d 6300 } else
a7a3b1e9 6301 data->cancelled = true;
e6b3c4db 6302 rpc_put_task(task);
3110ff80 6303 dprintk("%s: done, ret = %d!\n", __func__, ret);
48c9579a 6304 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
a5d16a4d 6305 return ret;
1da177e4
LT		 6306}
6307
6308static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
6309{
202b50dc 6310 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6311 struct nfs4_exception exception = {
6312 .inode = state->inode,
6313 };
202b50dc
TM		 6314 int err;
6315
6316 do {
42a2d13e
TM		 6317 /* Cache the lock if possible... */
6318 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6319 return 0;
afe6c27c 6320 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 6321 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 6322 break;
6323 nfs4_handle_exception(server, err, &exception);
6324 } while (exception.retry);
6325 return err;
1da177e4
LT		 6326}
6327
6328static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
6329{
202b50dc 6330 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6331 struct nfs4_exception exception = {
6332 .inode = state->inode,
6333 };
202b50dc
TM		 6334 int err;
6335
6bfc93ef
TM		 6336 err = nfs4_set_lock_state(state, request);
6337 if (err != 0)
6338 return err;
f6de7a39 6339 if (!recover_lost_locks) {
ef1820f9
N		 6340 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
6341 return 0;
6342 }
202b50dc 6343 do {
42a2d13e
TM		 6344 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6345 return 0;
afe6c27c 6346 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 6347 switch (err) {
6348 default:
6349 goto out;
6350 case -NFS4ERR_GRACE:
6351 case -NFS4ERR_DELAY:
6352 nfs4_handle_exception(server, err, &exception);
6353 err = 0;
6354 }
202b50dc 6355 } while (exception.retry);
a9ed2e25 6356out:
202b50dc 6357 return err;
1da177e4
LT		 6358}
6359
f062eb6c 6360#if defined(CONFIG_NFS_V4_1)
b01dd1d8
BS		 6361static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6362{
c5896fc8
TM		 6363 struct nfs4_lock_state *lsp;
6364 int status;
b01dd1d8 6365
c5896fc8
TM		 6366 status = nfs4_set_lock_state(state, request);
6367 if (status != 0)
6368 return status;
6369 lsp = request->fl_u.nfs4_fl.owner;
6370 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) ||
6371 test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
6372 return 0;
81b68de4 6373 return nfs4_lock_expired(state, request);
f062eb6c
BS		 6374}
6375#endif
6376
1da177e4
LT		 6377static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6378{
19e03c57 6379 struct nfs_inode *nfsi = NFS_I(state->inode);
11476e9d 6380 struct nfs4_state_owner *sp = state->owner;
01c3b861 6381 unsigned char fl_flags = request->fl_flags;
1ea67dbd 6382 int status;
1da177e4 6383
01c3b861 6384 request->fl_flags |= FL_ACCESS;
75575ddf 6385 status = locks_lock_inode_wait(state->inode, request);
01c3b861
TM		 6386 if (status < 0)
6387 goto out;
11476e9d 6388 mutex_lock(&sp->so_delegreturn_mutex);
19e03c57 6389 down_read(&nfsi->rwsem);
01c3b861 6390 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6391 /* Yes: cache locks! */
01c3b861 6392 /* ...but avoid races with delegation recall... */
19e03c57 6393 request->fl_flags = fl_flags & ~FL_SLEEP;
75575ddf 6394 status = locks_lock_inode_wait(state->inode, request);
c69899a1 6395 up_read(&nfsi->rwsem);
11476e9d 6396 mutex_unlock(&sp->so_delegreturn_mutex);
9a99af49 6397 goto out;
9a99af49 6398 }
19e03c57 6399 up_read(&nfsi->rwsem);
11476e9d 6400 mutex_unlock(&sp->so_delegreturn_mutex);
c69899a1 6401 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6402out:
6403 request->fl_flags = fl_flags;
1da177e4
LT		 6404 return status;
6405}
6406
6407static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6408{
a1d0b5ee
TM		 6409 struct nfs4_exception exception = {
6410 .state = state,
05ffe24f 6411 .inode = state->inode,
a1d0b5ee 6412 };
1da177e4
LT		 6413 int err;
6414
6415 do {
965b5d67
TM		 6416 err = _nfs4_proc_setlk(state, cmd, request);
6417 if (err == -NFS4ERR_DENIED)
6418 err = -EAGAIN;
1da177e4 6419 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6420 err, &exception);
1da177e4
LT		 6421 } while (exception.retry);
6422 return err;
6423}
6424
d2f3a7f9
JL		 6425#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
6426#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
6427
6428static int
a1d617d8
JL		 6429nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd,
6430 struct file_lock *request)
d2f3a7f9
JL		 6431{
6432 int status = -ERESTARTSYS;
6433 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6434
6435 while(!signalled()) {
6436 status = nfs4_proc_setlk(state, cmd, request);
6437 if ((status != -EAGAIN) || IS_SETLK(cmd))
6438 break;
6439 freezable_schedule_timeout_interruptible(timeout);
6440 timeout *= 2;
6441 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout);
6442 status = -ERESTARTSYS;
6443 }
6444 return status;
6445}
6446
a1d617d8
JL		 6447#ifdef CONFIG_NFS_V4_1
6448struct nfs4_lock_waiter {
6449 struct task_struct *task;
6450 struct inode *inode;
6451 struct nfs_lowner *owner;
6452 bool notified;
6453};
6454
6455static int
ac6424b9 6456nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key)
a1d617d8
JL		 6457{
6458 int ret;
6459 struct cb_notify_lock_args *cbnl = key;
6460 struct nfs4_lock_waiter *waiter = wait->private;
6461 struct nfs_lowner *lowner = &cbnl->cbnl_owner,
6462 *wowner = waiter->owner;
6463
6464 /* Only wake if the callback was for the same owner */
6465 if (lowner->clientid != wowner->clientid ||
6466 lowner->id != wowner->id ||
6467 lowner->s_dev != wowner->s_dev)
6468 return 0;
6469
6470 /* Make sure it's for the right inode */
6471 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
6472 return 0;
6473
6474 waiter->notified = true;
6475
6476 /* override "private" so we can use default_wake_function */
6477 wait->private = waiter->task;
6478 ret = autoremove_wake_function(wait, mode, flags, key);
6479 wait->private = waiter;
6480 return ret;
6481}
6482
6483static int
6484nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6485{
6486 int status = -ERESTARTSYS;
6487 unsigned long flags;
6488 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
6489 struct nfs_server *server = NFS_SERVER(state->inode);
6490 struct nfs_client *clp = server->nfs_client;
6491 wait_queue_head_t *q = &clp->cl_lock_waitq;
6492 struct nfs_lowner owner = { .clientid = clp->cl_clientid,
6493 .id = lsp->ls_seqid.owner_id,
6494 .s_dev = server->s_dev };
6495 struct nfs4_lock_waiter waiter = { .task = current,
6496 .inode = state->inode,
6497 .owner = &owner,
6498 .notified = false };
ac6424b9 6499 wait_queue_entry_t wait;
a1d617d8
JL		 6500
6501 /* Don't bother with waitqueue if we don't expect a callback */
6502 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags))
6503 return nfs4_retry_setlk_simple(state, cmd, request);
6504
6505 init_wait(&wait);
6506 wait.private = &waiter;
6507 wait.func = nfs4_wake_lock_waiter;
6508 add_wait_queue(q, &wait);
6509
6510 while(!signalled()) {
6511 status = nfs4_proc_setlk(state, cmd, request);
6512 if ((status != -EAGAIN) || IS_SETLK(cmd))
6513 break;
6514
6515 status = -ERESTARTSYS;
6516 spin_lock_irqsave(&q->lock, flags);
6517 if (waiter.notified) {
6518 spin_unlock_irqrestore(&q->lock, flags);
6519 continue;
6520 }
6521 set_current_state(TASK_INTERRUPTIBLE);
6522 spin_unlock_irqrestore(&q->lock, flags);
6523
b7dbcc0e 6524 freezable_schedule_timeout(NFS4_LOCK_MAXTIMEOUT);
a1d617d8
JL		 6525 }
6526
6527 finish_wait(q, &wait);
6528 return status;
6529}
6530#else /* !CONFIG_NFS_V4_1 */
6531static inline int
6532nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6533{
6534 return nfs4_retry_setlk_simple(state, cmd, request);
6535}
6536#endif
6537
1da177e4
LT		 6538static int
6539nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6540{
6541 struct nfs_open_context *ctx;
6542 struct nfs4_state *state;
1da177e4
LT		 6543 int status;
6544
6545 /* verify open state */
cd3758e3 6546 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6547 state = ctx->state;
6548
d953126a
TM		 6549 if (IS_GETLK(cmd)) {
6550 if (state != NULL)
6551 return nfs4_proc_getlk(state, F_GETLK, request);
6552 return 0;
6553 }
1da177e4
LT		 6554
6555 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6556 return -EINVAL;
6557
d953126a
TM		 6558 if (request->fl_type == F_UNLCK) {
6559 if (state != NULL)
6560 return nfs4_proc_unlck(state, cmd, request);
6561 return 0;
6562 }
1da177e4 6563
d953126a
TM		 6564 if (state == NULL)
6565 return -ENOLCK;
1ea67dbd
JL		 6566
6567 if ((request->fl_flags & FL_POSIX) &&
6568 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6569 return -ENOLCK;
6570
1ea67dbd
JL		 6571 status = nfs4_set_lock_state(state, request);
6572 if (status != 0)
6573 return status;
6574
d2f3a7f9 6575 return nfs4_retry_setlk(state, cmd, request);
1da177e4
LT		 6576}
6577
db4f2e63 6578int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6579{
6580 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6581 int err;
6582
6583 err = nfs4_set_lock_state(state, fl);
6584 if (err != 0)
db4f2e63 6585 return err;
4a706fa0 6586 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6587 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6588}
6b3b5496 6589
cf470c3e
TM		 6590struct nfs_release_lockowner_data {
6591 struct nfs4_lock_state *lsp;
5ae67c4f 6592 struct nfs_server *server;
cf470c3e 6593 struct nfs_release_lockowner_args args;
b7e63a10 6594 struct nfs_release_lockowner_res res;
60ea6812 6595 unsigned long timestamp;
cf470c3e
TM		 6596};
6597
fbd4bfd1
CL		 6598static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6599{
6600 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6601 struct nfs_server *server = data->server;
7981c8a6
AS		 6602 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
6603 &data->res.seq_res, task);
5b53dc88 6604 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6605 data->timestamp = jiffies;
fbd4bfd1
CL		 6606}
6607
6608static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6609{
6610 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6611 struct nfs_server *server = data->server;
6612
b7e63a10 6613 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6614
6615 switch (task->tk_status) {
6616 case 0:
6617 renew_lease(server, data->timestamp);
6618 break;
6619 case -NFS4ERR_STALE_CLIENTID:
6620 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6621 nfs4_schedule_lease_recovery(server->nfs_client);
6622 break;
60ea6812
CL		 6623 case -NFS4ERR_LEASE_MOVED:
6624 case -NFS4ERR_DELAY:
8478eaa1
N		 6625 if (nfs4_async_handle_error(task, server,
6626 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6627 rpc_restart_call_prepare(task);
6628 }
fbd4bfd1
CL		 6629}
6630
d3c7b7cc
TM		 6631static void nfs4_release_lockowner_release(void *calldata)
6632{
cf470c3e 6633 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6634 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6635 kfree(calldata);
6636}
6637
17280175 6638static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6639 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6640 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6641 .rpc_release = nfs4_release_lockowner_release,
6642};
6643
f1cdae87
JL		 6644static void
6645nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6646{
cf470c3e 6647 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6648 struct rpc_message msg = {
6649 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6650 };
6651
6652 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6653 return;
fbd4bfd1 6654
cf470c3e
TM		 6655 data = kmalloc(sizeof(*data), GFP_NOFS);
6656 if (!data)
f1cdae87 6657 return;
cf470c3e 6658 data->lsp = lsp;
5ae67c4f 6659 data->server = server;
cf470c3e
TM		 6660 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6661 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6662 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6663
cf470c3e 6664 msg.rpc_argp = &data->args;
b7e63a10
TM		 6665 msg.rpc_resp = &data->res;
6666 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6667 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6668}
6669
aa1870af
BF		 6670#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6671
d9a82a04 6672static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
59301226
AV		 6673 struct dentry *unused, struct inode *inode,
6674 const char *key, const void *buf,
6675 size_t buflen, int flags)
6b3b5496 6676{
59301226 6677 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 6678}
6679
d9a82a04 6680static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
b296821a
AV		 6681 struct dentry *unused, struct inode *inode,
6682 const char *key, void *buf, size_t buflen)
6b3b5496 6683{
b296821a 6684 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 6685}
6686
764a5c6b 6687static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6b3b5496 6688{
764a5c6b 6689 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6b3b5496
BF		 6690}
6691
c9bccef6 6692#ifdef CONFIG_NFS_V4_SECURITY_LABEL
c9bccef6 6693
d9a82a04 6694static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
59301226
AV		 6695 struct dentry *unused, struct inode *inode,
6696 const char *key, const void *buf,
6697 size_t buflen, int flags)
c9bccef6
DQ		 6698{
6699 if (security_ismaclabel(key))
59301226 6700 return nfs4_set_security_label(inode, buf, buflen);
c9bccef6
DQ		 6701
6702 return -EOPNOTSUPP;
6703}
6704
d9a82a04 6705static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
b296821a
AV		 6706 struct dentry *unused, struct inode *inode,
6707 const char *key, void *buf, size_t buflen)
c9bccef6
DQ		 6708{
6709 if (security_ismaclabel(key))
b296821a 6710 return nfs4_get_security_label(inode, buf, buflen);
c9bccef6
DQ		 6711 return -EOPNOTSUPP;
6712}
6713
c4803c49
AG		 6714static ssize_t
6715nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
c9bccef6 6716{
c4803c49 6717 int len = 0;
c9bccef6 6718
c4803c49
AG		 6719 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
6720 len = security_inode_listsecurity(inode, list, list_len);
6721 if (list_len && len > list_len)
6722 return -ERANGE;
c9bccef6
DQ		 6723 }
6724 return len;
6725}
6726
6727static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6728 .prefix = XATTR_SECURITY_PREFIX,
c9bccef6
DQ		 6729 .get = nfs4_xattr_get_nfs4_label,
6730 .set = nfs4_xattr_set_nfs4_label,
6731};
c9bccef6 6732
c4803c49
AG		 6733#else
6734
6735static ssize_t
6736nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6737{
6738 return 0;
6739}
6740
6741#endif
c9bccef6 6742
533eb461
AA		 6743/*
6744 * nfs_fhget will use either the mounted_on_fileid or the fileid
6745 */
69aaaae1
TM		 6746static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6747{
533eb461
AA		 6748 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6749 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6750 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6751 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6752 return;
6753
6754 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6755 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6756 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6757 fattr->nlink = 2;
6758}
6759
f05d147f
BS		 6760static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6761 const struct qstr *name,
6762 struct nfs4_fs_locations *fs_locations,
6763 struct page *page)
683b57b4
TM		 6764{
6765 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6766 u32 bitmask[3] = {
361e624f 6767 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6768 };
6769 struct nfs4_fs_locations_arg args = {
6770 .dir_fh = NFS_FH(dir),
c228fd3a 6771 .name = name,
683b57b4
TM		 6772 .page = page,
6773 .bitmask = bitmask,
6774 };
22958463
BH		 6775 struct nfs4_fs_locations_res res = {
6776 .fs_locations = fs_locations,
6777 };
683b57b4
TM		 6778 struct rpc_message msg = {
6779 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6780 .rpc_argp = &args,
22958463 6781 .rpc_resp = &res,
683b57b4
TM		 6782 };
6783 int status;
6784
3110ff80 6785 dprintk("%s: start\n", __func__);
533eb461
AA		 6786
6787 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6788 * is not supported */
6789 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6790 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6791 else
6792 bitmask[0] |= FATTR4_WORD0_FILEID;
6793
c228fd3a 6794 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6795 fs_locations->server = server;
830b8e33 6796 fs_locations->nlocations = 0;
f05d147f 6797 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6798 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6799 return status;
6800}
6801
f05d147f
BS		 6802int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6803 const struct qstr *name,
6804 struct nfs4_fs_locations *fs_locations,
6805 struct page *page)
db0a9593
BS		 6806{
6807 struct nfs4_exception exception = { };
6808 int err;
6809 do {
078ea3df
TM		 6810 err = _nfs4_proc_fs_locations(client, dir, name,
6811 fs_locations, page);
6812 trace_nfs4_get_fs_locations(dir, name, err);
6813 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6814 &exception);
6815 } while (exception.retry);
6816 return err;
6817}
6818
b03d735b
CL		 6819/*
6820 * This operation also signals the server that this client is
6821 * performing migration recovery. The server can stop returning
6822 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6823 * appended to this compound to identify the client ID which is
6824 * performing recovery.
6825 */
6826static int _nfs40_proc_get_locations(struct inode *inode,
6827 struct nfs4_fs_locations *locations,
6828 struct page *page, struct rpc_cred *cred)
6829{
6830 struct nfs_server *server = NFS_SERVER(inode);
6831 struct rpc_clnt *clnt = server->client;
6832 u32 bitmask[2] = {
6833 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6834 };
6835 struct nfs4_fs_locations_arg args = {
6836 .clientid = server->nfs_client->cl_clientid,
6837 .fh = NFS_FH(inode),
6838 .page = page,
6839 .bitmask = bitmask,
6840 .migration = 1, /* skip LOOKUP */
6841 .renew = 1, /* append RENEW */
6842 };
6843 struct nfs4_fs_locations_res res = {
6844 .fs_locations = locations,
6845 .migration = 1,
6846 .renew = 1,
6847 };
6848 struct rpc_message msg = {
6849 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6850 .rpc_argp = &args,
6851 .rpc_resp = &res,
6852 .rpc_cred = cred,
6853 };
6854 unsigned long now = jiffies;
6855 int status;
6856
6857 nfs_fattr_init(&locations->fattr);
6858 locations->server = server;
6859 locations->nlocations = 0;
6860
6861 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6862 nfs4_set_sequence_privileged(&args.seq_args);
6863 status = nfs4_call_sync_sequence(clnt, server, &msg,
6864 &args.seq_args, &res.seq_res);
6865 if (status)
6866 return status;
6867
6868 renew_lease(server, now);
6869 return 0;
6870}
6871
6872#ifdef CONFIG_NFS_V4_1
6873
6874/*
6875 * This operation also signals the server that this client is
6876 * performing migration recovery. The server can stop asserting
6877 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6878 * performing this operation is identified in the SEQUENCE
6879 * operation in this compound.
6880 *
6881 * When the client supports GETATTR(fs_locations_info), it can
6882 * be plumbed in here.
6883 */
6884static int _nfs41_proc_get_locations(struct inode *inode,
6885 struct nfs4_fs_locations *locations,
6886 struct page *page, struct rpc_cred *cred)
6887{
6888 struct nfs_server *server = NFS_SERVER(inode);
6889 struct rpc_clnt *clnt = server->client;
6890 u32 bitmask[2] = {
6891 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6892 };
6893 struct nfs4_fs_locations_arg args = {
6894 .fh = NFS_FH(inode),
6895 .page = page,
6896 .bitmask = bitmask,
6897 .migration = 1, /* skip LOOKUP */
6898 };
6899 struct nfs4_fs_locations_res res = {
6900 .fs_locations = locations,
6901 .migration = 1,
6902 };
6903 struct rpc_message msg = {
6904 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6905 .rpc_argp = &args,
6906 .rpc_resp = &res,
6907 .rpc_cred = cred,
6908 };
6909 int status;
6910
6911 nfs_fattr_init(&locations->fattr);
6912 locations->server = server;
6913 locations->nlocations = 0;
6914
6915 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6916 nfs4_set_sequence_privileged(&args.seq_args);
6917 status = nfs4_call_sync_sequence(clnt, server, &msg,
6918 &args.seq_args, &res.seq_res);
6919 if (status == NFS4_OK &&
6920 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6921 status = -NFS4ERR_LEASE_MOVED;
6922 return status;
6923}
6924
6925#endif /* CONFIG_NFS_V4_1 */
6926
6927/**
6928 * nfs4_proc_get_locations - discover locations for a migrated FSID
6929 * @inode: inode on FSID that is migrating
6930 * @locations: result of query
6931 * @page: buffer
6932 * @cred: credential to use for this operation
6933 *
6934 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6935 * operation failed, or a negative errno if a local error occurred.
6936 *
6937 * On success, "locations" is filled in, but if the server has
6938 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6939 * asserted.
6940 *
6941 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6942 * from this client that require migration recovery.
6943 */
6944int nfs4_proc_get_locations(struct inode *inode,
6945 struct nfs4_fs_locations *locations,
6946 struct page *page, struct rpc_cred *cred)
6947{
6948 struct nfs_server *server = NFS_SERVER(inode);
6949 struct nfs_client *clp = server->nfs_client;
6950 const struct nfs4_mig_recovery_ops *ops =
6951 clp->cl_mvops->mig_recovery_ops;
6952 struct nfs4_exception exception = { };
6953 int status;
6954
6955 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6956 (unsigned long long)server->fsid.major,
6957 (unsigned long long)server->fsid.minor,
6958 clp->cl_hostname);
6959 nfs_display_fhandle(NFS_FH(inode), __func__);
6960
6961 do {
6962 status = ops->get_locations(inode, locations, page, cred);
6963 if (status != -NFS4ERR_DELAY)
6964 break;
6965 nfs4_handle_exception(server, status, &exception);
6966 } while (exception.retry);
6967 return status;
6968}
6969
44c99933
CL		 6970/*
6971 * This operation also signals the server that this client is
6972 * performing "lease moved" recovery. The server can stop
6973 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6974 * is appended to this compound to identify the client ID which is
6975 * performing recovery.
6976 */
6977static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6978{
6979 struct nfs_server *server = NFS_SERVER(inode);
6980 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6981 struct rpc_clnt *clnt = server->client;
6982 struct nfs4_fsid_present_arg args = {
6983 .fh = NFS_FH(inode),
6984 .clientid = clp->cl_clientid,
6985 .renew = 1, /* append RENEW */
6986 };
6987 struct nfs4_fsid_present_res res = {
6988 .renew = 1,
6989 };
6990 struct rpc_message msg = {
6991 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6992 .rpc_argp = &args,
6993 .rpc_resp = &res,
6994 .rpc_cred = cred,
6995 };
6996 unsigned long now = jiffies;
6997 int status;
6998
6999 res.fh = nfs_alloc_fhandle();
7000 if (res.fh == NULL)
7001 return -ENOMEM;
7002
7003 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
7004 nfs4_set_sequence_privileged(&args.seq_args);
7005 status = nfs4_call_sync_sequence(clnt, server, &msg,
7006 &args.seq_args, &res.seq_res);
7007 nfs_free_fhandle(res.fh);
7008 if (status)
7009 return status;
7010
7011 do_renew_lease(clp, now);
7012 return 0;
7013}
7014
7015#ifdef CONFIG_NFS_V4_1
7016
7017/*
7018 * This operation also signals the server that this client is
7019 * performing "lease moved" recovery. The server can stop asserting
7020 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
7021 * this operation is identified in the SEQUENCE operation in this
7022 * compound.
7023 */
7024static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7025{
7026 struct nfs_server *server = NFS_SERVER(inode);
7027 struct rpc_clnt *clnt = server->client;
7028 struct nfs4_fsid_present_arg args = {
7029 .fh = NFS_FH(inode),
7030 };
7031 struct nfs4_fsid_present_res res = {
7032 };
7033 struct rpc_message msg = {
7034 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
7035 .rpc_argp = &args,
7036 .rpc_resp = &res,
7037 .rpc_cred = cred,
7038 };
7039 int status;
7040
7041 res.fh = nfs_alloc_fhandle();
7042 if (res.fh == NULL)
7043 return -ENOMEM;
7044
7045 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
7046 nfs4_set_sequence_privileged(&args.seq_args);
7047 status = nfs4_call_sync_sequence(clnt, server, &msg,
7048 &args.seq_args, &res.seq_res);
7049 nfs_free_fhandle(res.fh);
7050 if (status == NFS4_OK &&
7051 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
7052 status = -NFS4ERR_LEASE_MOVED;
7053 return status;
7054}
7055
7056#endif /* CONFIG_NFS_V4_1 */
7057
7058/**
7059 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
7060 * @inode: inode on FSID to check
7061 * @cred: credential to use for this operation
7062 *
7063 * Server indicates whether the FSID is present, moved, or not
7064 * recognized. This operation is necessary to clear a LEASE_MOVED
7065 * condition for this client ID.
7066 *
7067 * Returns NFS4_OK if the FSID is present on this server,
7068 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
7069 * NFS4ERR code if some error occurred on the server, or a
7070 * negative errno if a local failure occurred.
7071 */
7072int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7073{
7074 struct nfs_server *server = NFS_SERVER(inode);
7075 struct nfs_client *clp = server->nfs_client;
7076 const struct nfs4_mig_recovery_ops *ops =
7077 clp->cl_mvops->mig_recovery_ops;
7078 struct nfs4_exception exception = { };
7079 int status;
7080
7081 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
7082 (unsigned long long)server->fsid.major,
7083 (unsigned long long)server->fsid.minor,
7084 clp->cl_hostname);
7085 nfs_display_fhandle(NFS_FH(inode), __func__);
7086
7087 do {
7088 status = ops->fsid_present(inode, cred);
7089 if (status != -NFS4ERR_DELAY)
7090 break;
7091 nfs4_handle_exception(server, status, &exception);
7092 } while (exception.retry);
7093 return status;
7094}
7095
5ec16a85 7096/**
a5250def
WAA		 7097 * If 'use_integrity' is true and the state managment nfs_client
7098 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
7099 * and the machine credential as per RFC3530bis and RFC5661 Security
7100 * Considerations sections. Otherwise, just use the user cred with the
7101 * filesystem's rpc_client.
5ec16a85 7102 */
a5250def 7103static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 7104{
7105 int status;
7106 struct nfs4_secinfo_arg args = {
7107 .dir_fh = NFS_FH(dir),
7108 .name = name,
7109 };
7110 struct nfs4_secinfo_res res = {
7111 .flavors = flavors,
7112 };
7113 struct rpc_message msg = {
7114 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
7115 .rpc_argp = &args,
7116 .rpc_resp = &res,
7117 };
a5250def 7118 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 7119 struct rpc_cred *cred = NULL;
a5250def
WAA		 7120
7121 if (use_integrity) {
7122 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 7123 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
7124 msg.rpc_cred = cred;
a5250def 7125 }
5a5ea0d4
BS		 7126
7127 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 7128
7129 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
7130 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
7131
a5250def
WAA		 7132 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
7133 &res.seq_res, 0);
5a5ea0d4 7134 dprintk("NFS reply secinfo: %d\n", status);
a5250def 7135
7cb852df
WAA		 7136 if (cred)
7137 put_rpccred(cred);
a5250def 7138
5a5ea0d4
BS		 7139 return status;
7140}
7141
72de53ec
BS		 7142int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
7143 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 7144{
7145 struct nfs4_exception exception = { };
7146 int err;
7147 do {
a5250def
WAA		 7148 err = -NFS4ERR_WRONGSEC;
7149
7150 /* try to use integrity protection with machine cred */
7151 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
7152 err = _nfs4_proc_secinfo(dir, name, flavors, true);
7153
7154 /*
7155 * if unable to use integrity protection, or SECINFO with
7156 * integrity protection returns NFS4ERR_WRONGSEC (which is
7157 * disallowed by spec, but exists in deployed servers) use
7158 * the current filesystem's rpc_client and the user cred.
7159 */
7160 if (err == -NFS4ERR_WRONGSEC)
7161 err = _nfs4_proc_secinfo(dir, name, flavors, false);
7162
078ea3df
TM		 7163 trace_nfs4_secinfo(dir, name, err);
7164 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 7165 &exception);
7166 } while (exception.retry);
7167 return err;
7168}
7169
557134a3 7170#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 7171/*
7172 * Check the exchange flags returned by the server for invalid flags, having
7173 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
7174 * DS flags set.
7175 */
7176static int nfs4_check_cl_exchange_flags(u32 flags)
7177{
7178 if (flags & ~EXCHGID4_FLAG_MASK_R)
7179 goto out_inval;
7180 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
7181 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
7182 goto out_inval;
7183 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
7184 goto out_inval;
7185 return NFS_OK;
7186out_inval:
7187 return -NFS4ERR_INVAL;
7188}
7189
78fe0f41 7190static bool
79d4e1f0
CL		 7191nfs41_same_server_scope(struct nfs41_server_scope *a,
7192 struct nfs41_server_scope *b)
78fe0f41 7193{
49ad0145
AS		 7194 if (a->server_scope_sz != b->server_scope_sz)
7195 return false;
7196 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0;
78fe0f41
WAA		 7197}
7198
02a95dee
AA		 7199static void
7200nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
7201{
7202}
7203
7204static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
7205 .rpc_call_done = &nfs4_bind_one_conn_to_session_done,
7206};
7207
7c44f1ae 7208/*
d9ddbf5d 7209 * nfs4_proc_bind_one_conn_to_session()
7c44f1ae
WAA		 7210 *
7211 * The 4.1 client currently uses the same TCP connection for the
7212 * fore and backchannel.
7213 */
d9ddbf5d
TM		 7214static
7215int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
7216 struct rpc_xprt *xprt,
7217 struct nfs_client *clp,
7218 struct rpc_cred *cred)
7c44f1ae
WAA		 7219{
7220 int status;
71a097c6
TM		 7221 struct nfs41_bind_conn_to_session_args args = {
7222 .client = clp,
7223 .dir = NFS4_CDFC4_FORE_OR_BOTH,
7224 };
7c44f1ae
WAA		 7225 struct nfs41_bind_conn_to_session_res res;
7226 struct rpc_message msg = {
7227 .rpc_proc =
7228 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 7229 .rpc_argp = &args,
7c44f1ae 7230 .rpc_resp = &res,
2cf047c9 7231 .rpc_cred = cred,
7c44f1ae 7232 };
d9ddbf5d
TM		 7233 struct rpc_task_setup task_setup_data = {
7234 .rpc_client = clnt,
7235 .rpc_xprt = xprt,
02a95dee 7236 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
d9ddbf5d
TM		 7237 .rpc_message = &msg,
7238 .flags = RPC_TASK_TIMEOUT,
7239 };
7240 struct rpc_task *task;
7c44f1ae 7241
71a097c6
TM		 7242 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
7243 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
7244 args.dir = NFS4_CDFC4_FORE;
7c44f1ae 7245
d9ddbf5d
TM		 7246 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
7247 if (xprt != rcu_access_pointer(clnt->cl_xprt))
7248 args.dir = NFS4_CDFC4_FORE;
7249
7250 task = rpc_run_task(&task_setup_data);
7251 if (!IS_ERR(task)) {
7252 status = task->tk_status;
7253 rpc_put_task(task);
7254 } else
7255 status = PTR_ERR(task);
c6d01c6f 7256 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 7257 if (status == 0) {
71a097c6 7258 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 7259 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
7260 dprintk("NFS: %s: Session ID mismatch\n", __func__);
c7ae7639 7261 return -EIO;
7c44f1ae 7262 }
71a097c6 7263 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 7264 dprintk("NFS: %s: Unexpected direction from server\n",
7265 __func__);
c7ae7639 7266 return -EIO;
7c44f1ae 7267 }
71a097c6 7268 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 7269 dprintk("NFS: %s: Server returned RDMA mode = true\n",
7270 __func__);
c7ae7639 7271 return -EIO;
7c44f1ae
WAA		 7272 }
7273 }
c7ae7639 7274
7c44f1ae
WAA		 7275 return status;
7276}
7277
d9ddbf5d
TM		 7278struct rpc_bind_conn_calldata {
7279 struct nfs_client *clp;
7280 struct rpc_cred *cred;
7281};
7282
7283static int
7284nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
7285 struct rpc_xprt *xprt,
7286 void *calldata)
7287{
7288 struct rpc_bind_conn_calldata *p = calldata;
7289
7290 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
7291}
7292
7293int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7294{
7295 struct rpc_bind_conn_calldata data = {
7296 .clp = clp,
7297 .cred = cred,
7298 };
7299 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
7300 nfs4_proc_bind_conn_to_session_callback, &data);
7301}
7302
99fe60d0 7303/*
fa940720
WAA		 7304 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
7305 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 7306 */
7307static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
7308 .how = SP4_MACH_CRED,
7309 .enforce.u.words = {
7310 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7311 1 << (OP_EXCHANGE_ID - 32) |
7312 1 << (OP_CREATE_SESSION - 32) |
7313 1 << (OP_DESTROY_SESSION - 32) |
7314 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 7315 },
7316 .allow.u.words = {
7317 [0] = 1 << (OP_CLOSE) |
99ade3c7 7318 1 << (OP_OPEN_DOWNGRADE) |
a0279625 7319 1 << (OP_LOCKU) |
99ade3c7 7320 1 << (OP_DELEGRETURN) |
a0279625 7321 1 << (OP_COMMIT),
8b5bee2e 7322 [1] = 1 << (OP_SECINFO - 32) |
3787d506 7323 1 << (OP_SECINFO_NO_NAME - 32) |
99ade3c7 7324 1 << (OP_LAYOUTRETURN - 32) |
3787d506 7325 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 7326 1 << (OP_FREE_STATEID - 32) |
7327 1 << (OP_WRITE - 32)
2031cd1a
WAA		 7328 }
7329};
7330
7331/*
7332 * Select the state protection mode for client `clp' given the server results
7333 * from exchange_id in `sp'.
99fe60d0 7334 *
2031cd1a
WAA		 7335 * Returns 0 on success, negative errno otherwise.
7336 */
7337static int nfs4_sp4_select_mode(struct nfs_client *clp,
7338 struct nfs41_state_protection *sp)
7339{
7340 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
7341 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7342 1 << (OP_EXCHANGE_ID - 32) |
7343 1 << (OP_CREATE_SESSION - 32) |
7344 1 << (OP_DESTROY_SESSION - 32) |
7345 1 << (OP_DESTROY_CLIENTID - 32)
7346 };
937e3133 7347 unsigned long flags = 0;
2031cd1a 7348 unsigned int i;
937e3133 7349 int ret = 0;
2031cd1a
WAA		 7350
7351 if (sp->how == SP4_MACH_CRED) {
7352 /* Print state protect result */
7353 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
7354 for (i = 0; i <= LAST_NFS4_OP; i++) {
7355 if (test_bit(i, sp->enforce.u.longs))
7356 dfprintk(MOUNT, " enforce op %d\n", i);
7357 if (test_bit(i, sp->allow.u.longs))
7358 dfprintk(MOUNT, " allow op %d\n", i);
7359 }
7360
7361 /* make sure nothing is on enforce list that isn't supported */
7362 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
7363 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
7364 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
937e3133
TM		 7365 ret = -EINVAL;
7366 goto out;
2031cd1a
WAA		 7367 }
7368 }
7369
7370 /*
7371 * Minimal mode - state operations are allowed to use machine
7372 * credential. Note this already happens by default, so the
7373 * client doesn't have to do anything more than the negotiation.
7374 *
7375 * NOTE: we don't care if EXCHANGE_ID is in the list -
7376 * we're already using the machine cred for exchange_id
7377 * and will never use a different cred.
7378 */
7379 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
7380 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
7381 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
7382 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
7383 dfprintk(MOUNT, "sp4_mach_cred:\n");
7384 dfprintk(MOUNT, " minimal mode enabled\n");
937e3133 7385 __set_bit(NFS_SP4_MACH_CRED_MINIMAL, &flags);
2031cd1a
WAA		 7386 } else {
7387 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
937e3133
TM		 7388 ret = -EINVAL;
7389 goto out;
2031cd1a 7390 }
fa940720
WAA		 7391
7392 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
99ade3c7
AE		 7393 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
7394 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
fa940720
WAA		 7395 test_bit(OP_LOCKU, sp->allow.u.longs)) {
7396 dfprintk(MOUNT, " cleanup mode enabled\n");
937e3133 7397 __set_bit(NFS_SP4_MACH_CRED_CLEANUP, &flags);
fa940720 7398 }
8b5bee2e 7399
99ade3c7
AE		 7400 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
7401 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
937e3133 7402 __set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP, &flags);
99ade3c7
AE		 7403 }
7404
8b5bee2e
WAA		 7405 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
7406 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
7407 dfprintk(MOUNT, " secinfo mode enabled\n");
937e3133 7408 __set_bit(NFS_SP4_MACH_CRED_SECINFO, &flags);
8b5bee2e 7409 }
3787d506
WAA		 7410
7411 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
7412 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
7413 dfprintk(MOUNT, " stateid mode enabled\n");
937e3133 7414 __set_bit(NFS_SP4_MACH_CRED_STATEID, &flags);
3787d506 7415 }
8c21c62c
WAA		 7416
7417 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
7418 dfprintk(MOUNT, " write mode enabled\n");
937e3133 7419 __set_bit(NFS_SP4_MACH_CRED_WRITE, &flags);
8c21c62c
WAA		 7420 }
7421
7422 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
7423 dfprintk(MOUNT, " commit mode enabled\n");
937e3133 7424 __set_bit(NFS_SP4_MACH_CRED_COMMIT, &flags);
8c21c62c 7425 }
2031cd1a 7426 }
937e3133
TM		 7427out:
7428 clp->cl_sp4_flags = flags;
2031cd1a
WAA		 7429 return 0;
7430}
7431
8d89bd70
AA		 7432struct nfs41_exchange_id_data {
7433 struct nfs41_exchange_id_res res;
7434 struct nfs41_exchange_id_args args;
8d89bd70
AA		 7435};
7436
8d89bd70
AA		 7437static void nfs4_exchange_id_release(void *data)
7438{
7439 struct nfs41_exchange_id_data *cdata =
7440 (struct nfs41_exchange_id_data *)data;
7441
63513232 7442 nfs_put_client(cdata->args.client);
8d89bd70
AA		 7443 kfree(cdata->res.impl_id);
7444 kfree(cdata->res.server_scope);
7445 kfree(cdata->res.server_owner);
7446 kfree(cdata);
7447}
7448
7449static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
8d89bd70
AA		 7450 .rpc_release = nfs4_exchange_id_release,
7451};
7452
2031cd1a
WAA		 7453/*
7454 * _nfs4_proc_exchange_id()
6bbb4ae8 7455 *
2031cd1a 7456 * Wrapper for EXCHANGE_ID operation.
99fe60d0 7457 */
9c760d1f
TM		 7458static struct rpc_task *
7459nfs4_run_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
ad0849a7 7460 u32 sp4_how, struct rpc_xprt *xprt)
99fe60d0 7461{
99fe60d0
BH		 7462 struct rpc_message msg = {
7463 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
99fe60d0
BH		 7464 .rpc_cred = cred,
7465 };
8d89bd70
AA		 7466 struct rpc_task_setup task_setup_data = {
7467 .rpc_client = clp->cl_rpcclient,
7468 .callback_ops = &nfs4_exchange_id_call_ops,
7469 .rpc_message = &msg,
d9cb7330 7470 .flags = RPC_TASK_TIMEOUT,
8d89bd70
AA		 7471 };
7472 struct nfs41_exchange_id_data *calldata;
e917f0d1 7473 int status;
8d89bd70
AA		 7474
7475 if (!atomic_inc_not_zero(&clp->cl_count))
9c760d1f 7476 return ERR_PTR(-EIO);
8d89bd70 7477
9c760d1f 7478 status = -ENOMEM;
8d89bd70 7479 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
9c760d1f
TM		 7480 if (!calldata)
7481 goto out;
99fe60d0 7482
fd40559c 7483 nfs4_init_boot_verifier(clp, &calldata->args.verifier);
873e3851
JL		 7484
7485 status = nfs4_init_uniform_client_string(clp);
7486 if (status)
8d89bd70 7487 goto out_calldata;
3a6bb738 7488
8d89bd70
AA		 7489 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
7490 GFP_NOFS);
7491 status = -ENOMEM;
7492 if (unlikely(calldata->res.server_owner == NULL))
7493 goto out_calldata;
78fe0f41 7494
8d89bd70 7495 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 7496 GFP_NOFS);
8d89bd70 7497 if (unlikely(calldata->res.server_scope == NULL))
acdeb69d 7498 goto out_server_owner;
78fe0f41 7499
8d89bd70
AA		 7500 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
7501 if (unlikely(calldata->res.impl_id == NULL))
7d2ed9ac 7502 goto out_server_scope;
7d2ed9ac 7503
2031cd1a
WAA		 7504 switch (sp4_how) {
7505 case SP4_NONE:
8d89bd70 7506 calldata->args.state_protect.how = SP4_NONE;
2031cd1a
WAA		 7507 break;
7508
7509 case SP4_MACH_CRED:
8d89bd70 7510 calldata->args.state_protect = nfs4_sp4_mach_cred_request;
2031cd1a
WAA		 7511 break;
7512
7513 default:
7514 /* unsupported! */
7515 WARN_ON_ONCE(1);
7516 status = -EINVAL;
6b55970b 7517 goto out_impl_id;
2031cd1a 7518 }
ad0849a7 7519 if (xprt) {
ad0849a7 7520 task_setup_data.rpc_xprt = xprt;
d9cb7330 7521 task_setup_data.flags |= RPC_TASK_SOFTCONN;
fd40559c
TM		 7522 memcpy(calldata->args.verifier.data, clp->cl_confirm.data,
7523 sizeof(calldata->args.verifier.data));
ad0849a7 7524 }
8d89bd70 7525 calldata->args.client = clp;
8d89bd70 7526 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
bfab2817
TM		 7527 EXCHGID4_FLAG_BIND_PRINC_STATEID;
7528#ifdef CONFIG_NFS_V4_1_MIGRATION
7529 calldata->args.flags |= EXCHGID4_FLAG_SUPP_MOVED_MIGR;
8d89bd70
AA		 7530#endif
7531 msg.rpc_argp = &calldata->args;
7532 msg.rpc_resp = &calldata->res;
7533 task_setup_data.callback_data = calldata;
2031cd1a 7534
9c760d1f 7535 return rpc_run_task(&task_setup_data);
8d89bd70
AA		 7536
7537out_impl_id:
7538 kfree(calldata->res.impl_id);
7539out_server_scope:
7540 kfree(calldata->res.server_scope);
7541out_server_owner:
7542 kfree(calldata->res.server_owner);
7543out_calldata:
7544 kfree(calldata);
9c760d1f 7545out:
63513232 7546 nfs_put_client(clp);
9c760d1f
TM		 7547 return ERR_PTR(status);
7548}
7549
7550/*
7551 * _nfs4_proc_exchange_id()
7552 *
7553 * Wrapper for EXCHANGE_ID operation.
7554 */
7555static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
7556 u32 sp4_how)
7557{
7558 struct rpc_task *task;
7559 struct nfs41_exchange_id_args *argp;
7560 struct nfs41_exchange_id_res *resp;
7561 int status;
7562
7563 task = nfs4_run_exchange_id(clp, cred, sp4_how, NULL);
7564 if (IS_ERR(task))
7565 return PTR_ERR(task);
7566
7567 argp = task->tk_msg.rpc_argp;
7568 resp = task->tk_msg.rpc_resp;
7569 status = task->tk_status;
7570 if (status != 0)
7571 goto out;
7572
7573 status = nfs4_check_cl_exchange_flags(resp->flags);
7574 if (status != 0)
7575 goto out;
7576
7577 status = nfs4_sp4_select_mode(clp, &resp->state_protect);
7578 if (status != 0)
7579 goto out;
7580
7581 clp->cl_clientid = resp->clientid;
7582 clp->cl_exchange_flags = resp->flags;
7583 clp->cl_seqid = resp->seqid;
7584 /* Client ID is not confirmed */
7585 if (!(resp->flags & EXCHGID4_FLAG_CONFIRMED_R))
7586 clear_bit(NFS4_SESSION_ESTABLISHED,
7587 &clp->cl_session->session_state);
7588
7589 if (clp->cl_serverscope != NULL &&
7590 !nfs41_same_server_scope(clp->cl_serverscope,
7591 resp->server_scope)) {
7592 dprintk("%s: server_scope mismatch detected\n",
7593 __func__);
7594 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
7595 }
7596
7597 swap(clp->cl_serverowner, resp->server_owner);
7598 swap(clp->cl_serverscope, resp->server_scope);
7599 swap(clp->cl_implid, resp->impl_id);
7600
7601 /* Save the EXCHANGE_ID verifier session trunk tests */
7602 memcpy(clp->cl_confirm.data, argp->verifier.data,
7603 sizeof(clp->cl_confirm.data));
7604out:
7605 trace_nfs4_exchange_id(clp, status);
7606 rpc_put_task(task);
7607 return status;
99fe60d0
BH		 7608}
7609
2031cd1a
WAA		 7610/*
7611 * nfs4_proc_exchange_id()
7612 *
7613 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7614 *
7615 * Since the clientid has expired, all compounds using sessions
7616 * associated with the stale clientid will be returning
7617 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7618 * be in some phase of session reset.
7619 *
7620 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7621 */
7622int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7623{
7624 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7625 int status;
7626
7627 /* try SP4_MACH_CRED if krb5i/p */
7628 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7629 authflavor == RPC_AUTH_GSS_KRB5P) {
9c760d1f 7630 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
2031cd1a
WAA		 7631 if (!status)
7632 return 0;
7633 }
7634
7635 /* try SP4_NONE */
9c760d1f 7636 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
2031cd1a
WAA		 7637}
7638
04fa2c6b
AA		 7639/**
7640 * nfs4_test_session_trunk
7641 *
7642 * This is an add_xprt_test() test function called from
7643 * rpc_clnt_setup_test_and_add_xprt.
7644 *
7645 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt
7646 * and is dereferrenced in nfs4_exchange_id_release
7647 *
7648 * Upon success, add the new transport to the rpc_clnt
7649 *
7650 * @clnt: struct rpc_clnt to get new transport
7651 * @xprt: the rpc_xprt to test
7652 * @data: call data for _nfs4_proc_exchange_id.
7653 */
7654int nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
7655 void *data)
7656{
7657 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data;
9c760d1f
TM		 7658 struct rpc_task *task;
7659 int status;
7660
04fa2c6b
AA		 7661 u32 sp4_how;
7662
7663 dprintk("--> %s try %s\n", __func__,
7664 xprt->address_strings[RPC_DISPLAY_ADDR]);
7665
7666 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED);
7667
7668 /* Test connection for session trunking. Async exchange_id call */
9c760d1f
TM		 7669 task = nfs4_run_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
7670 if (IS_ERR(task))
7671 return PTR_ERR(task);
7672
7673 status = task->tk_status;
7674 if (status == 0)
7675 status = nfs4_detect_session_trunking(adata->clp,
7676 task->tk_msg.rpc_resp, xprt);
7677
7678 rpc_put_task(task);
7679 return status;
2031cd1a 7680}
04fa2c6b 7681EXPORT_SYMBOL_GPL(nfs4_test_session_trunk);
2031cd1a 7682
66245539
TM		 7683static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7684 struct rpc_cred *cred)
7685{
7686 struct rpc_message msg = {
7687 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7688 .rpc_argp = clp,
7689 .rpc_cred = cred,
7690 };
7691 int status;
7692
7693 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7694 trace_nfs4_destroy_clientid(clp, status);
66245539 7695 if (status)
02c67525 7696 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7697 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7698 return status;
7699}
7700
7701static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7702 struct rpc_cred *cred)
7703{
7704 unsigned int loop;
7705 int ret;
7706
7707 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7708 ret = _nfs4_proc_destroy_clientid(clp, cred);
7709 switch (ret) {
7710 case -NFS4ERR_DELAY:
7711 case -NFS4ERR_CLIENTID_BUSY:
7712 ssleep(1);
7713 break;
7714 default:
7715 return ret;
7716 }
7717 }
7718 return 0;
7719}
7720
7721int nfs4_destroy_clientid(struct nfs_client *clp)
7722{
7723 struct rpc_cred *cred;
7724 int ret = 0;
7725
7726 if (clp->cl_mvops->minor_version < 1)
7727 goto out;
7728 if (clp->cl_exchange_flags == 0)
7729 goto out;
05f4c350
CL		 7730 if (clp->cl_preserve_clid)
7731 goto out;
73d8bde5 7732 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7733 ret = nfs4_proc_destroy_clientid(clp, cred);
7734 if (cred)
7735 put_rpccred(cred);
7736 switch (ret) {
7737 case 0:
7738 case -NFS4ERR_STALE_CLIENTID:
7739 clp->cl_exchange_flags = 0;
7740 }
7741out:
7742 return ret;
7743}
7744
2050f0cc
AA		 7745struct nfs4_get_lease_time_data {
7746 struct nfs4_get_lease_time_args *args;
7747 struct nfs4_get_lease_time_res *res;
7748 struct nfs_client *clp;
7749};
7750
7751static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7752 void *calldata)
7753{
2050f0cc
AA		 7754 struct nfs4_get_lease_time_data *data =
7755 (struct nfs4_get_lease_time_data *)calldata;
7756
7757 dprintk("--> %s\n", __func__);
7758 /* just setup sequence, do not trigger session recovery
7759 since we're invoked within one */
7981c8a6 7760 nfs4_setup_sequence(data->clp,
d9afbd1b
TM		 7761 &data->args->la_seq_args,
7762 &data->res->lr_seq_res,
7763 task);
2050f0cc
AA		 7764 dprintk("<-- %s\n", __func__);
7765}
7766
7767/*
7768 * Called from nfs4_state_manager thread for session setup, so don't recover
7769 * from sequence operation or clientid errors.
7770 */
7771static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7772{
7773 struct nfs4_get_lease_time_data *data =
7774 (struct nfs4_get_lease_time_data *)calldata;
7775
7776 dprintk("--> %s\n", __func__);
14516c3a
TM		 7777 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7778 return;
2050f0cc
AA		 7779 switch (task->tk_status) {
7780 case -NFS4ERR_DELAY:
7781 case -NFS4ERR_GRACE:
7782 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7783 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7784 task->tk_status = 0;
a8a4ae3a
AA		 7785 /* fall through */
7786 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7787 rpc_restart_call_prepare(task);
2050f0cc
AA		 7788 return;
7789 }
2050f0cc
AA		 7790 dprintk("<-- %s\n", __func__);
7791}
7792
17280175 7793static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7794 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7795 .rpc_call_done = nfs4_get_lease_time_done,
7796};
7797
7798int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7799{
7800 struct rpc_task *task;
7801 struct nfs4_get_lease_time_args args;
7802 struct nfs4_get_lease_time_res res = {
7803 .lr_fsinfo = fsinfo,
7804 };
7805 struct nfs4_get_lease_time_data data = {
7806 .args = &args,
7807 .res = &res,
7808 .clp = clp,
7809 };
7810 struct rpc_message msg = {
7811 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7812 .rpc_argp = &args,
7813 .rpc_resp = &res,
7814 };
7815 struct rpc_task_setup task_setup = {
7816 .rpc_client = clp->cl_rpcclient,
7817 .rpc_message = &msg,
7818 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7819 .callback_data = &data,
7820 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7821 };
7822 int status;
7823
a9c92d6b 7824 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7825 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7826 task = rpc_run_task(&task_setup);
7827
7828 if (IS_ERR(task))
f6148713 7829 return PTR_ERR(task);
2050f0cc 7830
f6148713
AS		 7831 status = task->tk_status;
7832 rpc_put_task(task);
2050f0cc
AA		 7833 return status;
7834}
7835
fc931582
AA		 7836/*
7837 * Initialize the values to be used by the client in CREATE_SESSION
7838 * If nfs4_init_session set the fore channel request and response sizes,
7839 * use them.
7840 *
7841 * Set the back channel max_resp_sz_cached to zero to force the client to
7842 * always set csa_cachethis to FALSE because the current implementation
7843 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7844 */
6b26cc8c
CL		 7845static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
7846 struct rpc_clnt *clnt)
fc931582 7847{
18aad3d5 7848 unsigned int max_rqst_sz, max_resp_sz;
6b26cc8c 7849 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
18aad3d5
AA		 7850
7851 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7852 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7853
fc931582 7854 /* Fore channel attributes */
18aad3d5
AA		 7855 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7856 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7857 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7858 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7859
7860 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7861 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7862 __func__,
7863 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7864 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7865
7866 /* Back channel attributes */
6b26cc8c
CL		 7867 args->bc_attrs.max_rqst_sz = max_bc_payload;
7868 args->bc_attrs.max_resp_sz = max_bc_payload;
fc931582
AA		 7869 args->bc_attrs.max_resp_sz_cached = 0;
7870 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5405fc44 7871 args->bc_attrs.max_reqs = min_t(unsigned short, max_session_cb_slots, 1);
fc931582
AA		 7872
7873 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7874 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7875 __func__,
7876 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7877 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7878 args->bc_attrs.max_reqs);
7879}
7880
79969dd1
TM		 7881static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7882 struct nfs41_create_session_res *res)
8d35301d 7883{
43c2e885 7884 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7885 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7886
43c2e885
BF		 7887 if (rcvd->max_resp_sz > sent->max_resp_sz)
7888 return -EINVAL;
7889 /*
7890 * Our requested max_ops is the minimum we need; we're not
7891 * prepared to break up compounds into smaller pieces than that.
7892 * So, no point even trying to continue if the server won't
7893 * cooperate:
7894 */
7895 if (rcvd->max_ops < sent->max_ops)
7896 return -EINVAL;
7897 if (rcvd->max_reqs == 0)
7898 return -EINVAL;
b4b9a0c1
VG		 7899 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7900 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7901 return 0;
8d35301d
AA		 7902}
7903
79969dd1
TM		 7904static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7905 struct nfs41_create_session_res *res)
43c2e885
BF		 7906{
7907 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7908 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7909
b1c0df5f
TM		 7910 if (!(res->flags & SESSION4_BACK_CHAN))
7911 goto out;
43c2e885
BF		 7912 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7913 return -EINVAL;
7914 if (rcvd->max_resp_sz < sent->max_resp_sz)
7915 return -EINVAL;
7916 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7917 return -EINVAL;
5405fc44 7918 if (rcvd->max_ops > sent->max_ops)
43c2e885 7919 return -EINVAL;
5405fc44 7920 if (rcvd->max_reqs > sent->max_reqs)
43c2e885 7921 return -EINVAL;
b1c0df5f 7922out:
43c2e885
BF		 7923 return 0;
7924}
8d35301d 7925
8d35301d 7926static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7927 struct nfs41_create_session_res *res)
8d35301d 7928{
43c2e885 7929 int ret;
8d35301d 7930
79969dd1 7931 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7932 if (ret)
7933 return ret;
79969dd1
TM		 7934 return nfs4_verify_back_channel_attrs(args, res);
7935}
7936
7937static void nfs4_update_session(struct nfs4_session *session,
7938 struct nfs41_create_session_res *res)
7939{
7940 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7941 /* Mark client id and session as being confirmed */
7942 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7943 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7944 session->flags = res->flags;
7945 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7946 if (res->flags & SESSION4_BACK_CHAN)
7947 memcpy(&session->bc_attrs, &res->bc_attrs,
7948 sizeof(session->bc_attrs));
8d35301d
AA		 7949}
7950
848f5bda
TM		 7951static int _nfs4_proc_create_session(struct nfs_client *clp,
7952 struct rpc_cred *cred)
fc931582
AA		 7953{
7954 struct nfs4_session *session = clp->cl_session;
7955 struct nfs41_create_session_args args = {
7956 .client = clp,
79969dd1
TM		 7957 .clientid = clp->cl_clientid,
7958 .seqid = clp->cl_seqid,
fc931582
AA		 7959 .cb_program = NFS4_CALLBACK,
7960 };
79969dd1
TM		 7961 struct nfs41_create_session_res res;
7962
fc931582
AA		 7963 struct rpc_message msg = {
7964 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7965 .rpc_argp = &args,
7966 .rpc_resp = &res,
848f5bda 7967 .rpc_cred = cred,
fc931582
AA		 7968 };
7969 int status;
7970
6b26cc8c 7971 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
0f91421e 7972 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7973
1bd714f2 7974 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7975 trace_nfs4_create_session(clp, status);
fc931582 7976
b519d408
TM		 7977 switch (status) {
7978 case -NFS4ERR_STALE_CLIENTID:
7979 case -NFS4ERR_DELAY:
7980 case -ETIMEDOUT:
7981 case -EACCES:
7982 case -EAGAIN:
7983 goto out;
7984 };
7985
7986 clp->cl_seqid++;
43095d39 7987 if (!status) {
8d35301d 7988 /* Verify the session's negotiated channel_attrs values */
79969dd1 7989 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7990 /* Increment the clientid slot sequence id */
79969dd1
TM		 7991 if (status)
7992 goto out;
7993 nfs4_update_session(session, &res);
fc931582 7994 }
79969dd1 7995out:
fc931582
AA		 7996 return status;
7997}
7998
7999/*
8000 * Issues a CREATE_SESSION operation to the server.
8001 * It is the responsibility of the caller to verify the session is
8002 * expired before calling this routine.
8003 */
848f5bda 8004int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 8005{
8006 int status;
8007 unsigned *ptr;
fc931582
AA		 8008 struct nfs4_session *session = clp->cl_session;
8009
8010 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
8011
848f5bda 8012 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 8013 if (status)
8014 goto out;
8015
aacd5537
AA		 8016 /* Init or reset the session slot tables */
8017 status = nfs4_setup_session_slot_tables(session);
8018 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 8019 if (status)
8020 goto out;
8021
8022 ptr = (unsigned *)&session->sess_id.data[0];
8023 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
8024 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 8025out:
8026 dprintk("<-- %s\n", __func__);
8027 return status;
8028}
8029
0f3e66c6
AA		 8030/*
8031 * Issue the over-the-wire RPC DESTROY_SESSION.
8032 * The caller must serialize access to this routine.
8033 */
848f5bda
TM		 8034int nfs4_proc_destroy_session(struct nfs4_session *session,
8035 struct rpc_cred *cred)
0f3e66c6 8036{
848f5bda
TM		 8037 struct rpc_message msg = {
8038 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
8039 .rpc_argp = session,
8040 .rpc_cred = cred,
8041 };
0f3e66c6 8042 int status = 0;
0f3e66c6
AA		 8043
8044 dprintk("--> nfs4_proc_destroy_session\n");
8045
8046 /* session is still being setup */
e11259f9
TM		 8047 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
8048 return 0;
0f3e66c6 8049
1bd714f2 8050 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 8051 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 8052
8053 if (status)
08106ac7 8054 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 8055 "Session has been destroyed regardless...\n", status);
8056
8057 dprintk("<-- nfs4_proc_destroy_session\n");
8058 return status;
8059}
8060
fc01cea9
AA		 8061/*
8062 * Renew the cl_session lease.
8063 */
d5f8d3fe
TM		 8064struct nfs4_sequence_data {
8065 struct nfs_client *clp;
8066 struct nfs4_sequence_args args;
8067 struct nfs4_sequence_res res;
8068};
8069
dc96aef9
AB		 8070static void nfs41_sequence_release(void *data)
8071{
d5f8d3fe
TM		 8072 struct nfs4_sequence_data *calldata = data;
8073 struct nfs_client *clp = calldata->clp;
dc96aef9 8074
7135840f
AB		 8075 if (atomic_read(&clp->cl_count) > 1)
8076 nfs4_schedule_state_renewal(clp);
8077 nfs_put_client(clp);
d5f8d3fe 8078 kfree(calldata);
dc96aef9
AB		 8079}
8080
aa5190d0
TM		 8081static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8082{
8083 switch(task->tk_status) {
8084 case -NFS4ERR_DELAY:
aa5190d0
TM		 8085 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8086 return -EAGAIN;
8087 default:
0400a6b0 8088 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 8089 }
8090 return 0;
8091}
8092
dc96aef9 8093static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 8094{
d5f8d3fe
TM		 8095 struct nfs4_sequence_data *calldata = data;
8096 struct nfs_client *clp = calldata->clp;
fc01cea9 8097
14516c3a
TM		 8098 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
8099 return;
fc01cea9 8100
c6d01c6f 8101 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 8102 if (task->tk_status < 0) {
8103 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 8104 if (atomic_read(&clp->cl_count) == 1)
8105 goto out;
fc01cea9 8106
aa5190d0
TM		 8107 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
8108 rpc_restart_call_prepare(task);
fc01cea9
AA		 8109 return;
8110 }
8111 }
fc01cea9 8112 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 8113out:
fc01cea9
AA		 8114 dprintk("<-- %s\n", __func__);
8115}
8116
8117static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
8118{
d5f8d3fe
TM		 8119 struct nfs4_sequence_data *calldata = data;
8120 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 8121 struct nfs4_sequence_args *args;
8122 struct nfs4_sequence_res *res;
8123
fc01cea9
AA		 8124 args = task->tk_msg.rpc_argp;
8125 res = task->tk_msg.rpc_resp;
8126
7981c8a6 8127 nfs4_setup_sequence(clp, args, res, task);
fc01cea9
AA		 8128}
8129
8130static const struct rpc_call_ops nfs41_sequence_ops = {
8131 .rpc_call_done = nfs41_sequence_call_done,
8132 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 8133 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 8134};
8135
8fe72bac
TM		 8136static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
8137 struct rpc_cred *cred,
8138 bool is_privileged)
fc01cea9 8139{
d5f8d3fe 8140 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 8141 struct rpc_message msg = {
8142 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
8143 .rpc_cred = cred,
8144 };
71ac6da9
TM		 8145 struct rpc_task_setup task_setup_data = {
8146 .rpc_client = clp->cl_rpcclient,
8147 .rpc_message = &msg,
8fe72bac 8148 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 8149 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 8150 };
fc01cea9 8151
7135840f 8152 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 8153 return ERR_PTR(-EIO);
dfb4f309 8154 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 8155 if (calldata == NULL) {
7135840f 8156 nfs_put_client(clp);
71ac6da9 8157 return ERR_PTR(-ENOMEM);
fc01cea9 8158 }
a9c92d6b 8159 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 8160 if (is_privileged)
8161 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 8162 msg.rpc_argp = &calldata->args;
8163 msg.rpc_resp = &calldata->res;
8164 calldata->clp = clp;
71ac6da9 8165 task_setup_data.callback_data = calldata;
fc01cea9 8166
71ac6da9
TM		 8167 return rpc_run_task(&task_setup_data);
8168}
8169
2f60ea6b 8170static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 8171{
8172 struct rpc_task *task;
8173 int ret = 0;
8174
2f60ea6b 8175 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 8176 return -EAGAIN;
8fe72bac 8177 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 8178 if (IS_ERR(task))
8179 ret = PTR_ERR(task);
8180 else
bf294b41 8181 rpc_put_task_async(task);
71ac6da9
TM		 8182 dprintk("<-- %s status=%d\n", __func__, ret);
8183 return ret;
8184}
8185
8186static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
8187{
8188 struct rpc_task *task;
8189 int ret;
8190
8fe72bac 8191 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 8192 if (IS_ERR(task)) {
8193 ret = PTR_ERR(task);
8194 goto out;
8195 }
8196 ret = rpc_wait_for_completion_task(task);
be824167 8197 if (!ret)
71ac6da9
TM		 8198 ret = task->tk_status;
8199 rpc_put_task(task);
8200out:
8201 dprintk("<-- %s status=%d\n", __func__, ret);
8202 return ret;
fc01cea9
AA		 8203}
8204
fce5c838
RL		 8205struct nfs4_reclaim_complete_data {
8206 struct nfs_client *clp;
8207 struct nfs41_reclaim_complete_args arg;
8208 struct nfs41_reclaim_complete_res res;
8209};
8210
8211static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
8212{
8213 struct nfs4_reclaim_complete_data *calldata = data;
8214
7981c8a6 8215 nfs4_setup_sequence(calldata->clp,
d9afbd1b
TM		 8216 &calldata->arg.seq_args,
8217 &calldata->res.seq_res,
8218 task);
fce5c838
RL		 8219}
8220
aa5190d0
TM		 8221static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8222{
8223 switch(task->tk_status) {
8224 case 0:
8225 case -NFS4ERR_COMPLETE_ALREADY:
8226 case -NFS4ERR_WRONG_CRED: /* What to do here? */
8227 break;
8228 case -NFS4ERR_DELAY:
aa5190d0 8229 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 8230 /* fall through */
8231 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0 8232 return -EAGAIN;
0048fdd0
TM		 8233 case -NFS4ERR_BADSESSION:
8234 case -NFS4ERR_DEADSESSION:
8235 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
8236 nfs4_schedule_session_recovery(clp->cl_session,
8237 task->tk_status);
8238 break;
aa5190d0 8239 default:
0400a6b0 8240 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 8241 }
8242 return 0;
8243}
8244
fce5c838
RL		 8245static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
8246{
8247 struct nfs4_reclaim_complete_data *calldata = data;
8248 struct nfs_client *clp = calldata->clp;
8249 struct nfs4_sequence_res *res = &calldata->res.seq_res;
8250
8251 dprintk("--> %s\n", __func__);
14516c3a
TM		 8252 if (!nfs41_sequence_done(task, res))
8253 return;
fce5c838 8254
c6d01c6f 8255 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 8256 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
8257 rpc_restart_call_prepare(task);
8258 return;
8259 }
fce5c838
RL		 8260 dprintk("<-- %s\n", __func__);
8261}
8262
8263static void nfs4_free_reclaim_complete_data(void *data)
8264{
8265 struct nfs4_reclaim_complete_data *calldata = data;
8266
8267 kfree(calldata);
8268}
8269
8270static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
8271 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
8272 .rpc_call_done = nfs4_reclaim_complete_done,
8273 .rpc_release = nfs4_free_reclaim_complete_data,
8274};
8275
8276/*
8277 * Issue a global reclaim complete.
8278 */
965e9c23
TM		 8279static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
8280 struct rpc_cred *cred)
fce5c838
RL		 8281{
8282 struct nfs4_reclaim_complete_data *calldata;
8283 struct rpc_task *task;
8284 struct rpc_message msg = {
8285 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 8286 .rpc_cred = cred,
fce5c838
RL		 8287 };
8288 struct rpc_task_setup task_setup_data = {
8289 .rpc_client = clp->cl_rpcclient,
8290 .rpc_message = &msg,
8291 .callback_ops = &nfs4_reclaim_complete_call_ops,
8292 .flags = RPC_TASK_ASYNC,
8293 };
8294 int status = -ENOMEM;
8295
8296 dprintk("--> %s\n", __func__);
8535b2be 8297 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 8298 if (calldata == NULL)
8299 goto out;
8300 calldata->clp = clp;
8301 calldata->arg.one_fs = 0;
fce5c838 8302
a9c92d6b 8303 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 8304 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 8305 msg.rpc_argp = &calldata->arg;
8306 msg.rpc_resp = &calldata->res;
8307 task_setup_data.callback_data = calldata;
8308 task = rpc_run_task(&task_setup_data);
acf82b85 8309 if (IS_ERR(task)) {
fce5c838 8310 status = PTR_ERR(task);
acf82b85
DC		 8311 goto out;
8312 }
820bf85c 8313 status = rpc_wait_for_completion_task(task);
c34c32ea
AA		 8314 if (status == 0)
8315 status = task->tk_status;
fce5c838
RL		 8316 rpc_put_task(task);
8317out:
8318 dprintk("<-- %s status=%d\n", __func__, status);
8319 return status;
8320}
b1f69b75
AA		 8321
8322static void
8323nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
8324{
8325 struct nfs4_layoutget *lgp = calldata;
c31663d4 8326 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 8327
8328 dprintk("--> %s\n", __func__);
7981c8a6 8329 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args,
183d9e7b
JL		 8330 &lgp->res.seq_res, task);
8331 dprintk("<-- %s\n", __func__);
b1f69b75
AA		 8332}
8333
8334static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
8335{
8336 struct nfs4_layoutget *lgp = calldata;
183d9e7b
JL		 8337
8338 dprintk("--> %s\n", __func__);
2e80dbe7 8339 nfs41_sequence_process(task, &lgp->res.seq_res);
183d9e7b
JL		 8340 dprintk("<-- %s\n", __func__);
8341}
8342
8343static int
8344nfs4_layoutget_handle_exception(struct rpc_task *task,
8345 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
8346{
ee314c2a
TM		 8347 struct inode *inode = lgp->args.inode;
8348 struct nfs_server *server = NFS_SERVER(inode);
8349 struct pnfs_layout_hdr *lo;
e85d7ee4
TM		 8350 int nfs4err = task->tk_status;
8351 int err, status = 0;
f7db0b28 8352 LIST_HEAD(head);
b1f69b75 8353
ed7e5423 8354 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 8355
e85d7ee4 8356 switch (nfs4err) {
b1f69b75 8357 case 0:
ee314c2a 8358 goto out;
7c1e6e58
PT		 8359
8360 /*
8361 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
8362 * on the file. set tk_status to -ENODATA to tell upper layer to
8363 * retry go inband.
8364 */
8365 case -NFS4ERR_LAYOUTUNAVAILABLE:
183d9e7b 8366 status = -ENODATA;
7c1e6e58 8367 goto out;
21b874c8
TM		 8368 /*
8369 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
8370 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
8371 */
8372 case -NFS4ERR_BADLAYOUT:
183d9e7b
JL		 8373 status = -EOVERFLOW;
8374 goto out;
ed7e5423
BH		 8375 /*
8376 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
21b874c8
TM		 8377 * (or clients) writing to the same RAID stripe except when
8378 * the minlength argument is 0 (see RFC5661 section 18.43.3).
183d9e7b
JL		 8379 *
8380 * Treat it like we would RECALLCONFLICT -- we retry for a little
8381 * while, and then eventually give up.
ed7e5423 8382 */
b1f69b75 8383 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b
JL		 8384 if (lgp->args.minlength == 0) {
8385 status = -EOVERFLOW;
8386 goto out;
ed7e5423 8387 }
e85d7ee4
TM		 8388 status = -EBUSY;
8389 break;
183d9e7b 8390 case -NFS4ERR_RECALLCONFLICT:
183d9e7b 8391 status = -ERECALLCONFLICT;
e85d7ee4 8392 break;
26f47443
TM		 8393 case -NFS4ERR_DELEG_REVOKED:
8394 case -NFS4ERR_ADMIN_REVOKED:
ee314c2a
TM		 8395 case -NFS4ERR_EXPIRED:
8396 case -NFS4ERR_BAD_STATEID:
183d9e7b 8397 exception->timeout = 0;
ee314c2a 8398 spin_lock(&inode->i_lock);
f7db0b28
TM		 8399 lo = NFS_I(inode)->layout;
8400 /* If the open stateid was bad, then recover it. */
8401 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
e8fa33a6 8402 !nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) {
ee314c2a 8403 spin_unlock(&inode->i_lock);
183d9e7b 8404 exception->state = lgp->args.ctx->state;
26f47443 8405 exception->stateid = &lgp->args.stateid;
2259f960
TM		 8406 break;
8407 }
f7db0b28
TM		 8408
8409 /*
8410 * Mark the bad layout state as invalid, then retry
8411 */
668f455d 8412 pnfs_mark_layout_stateid_invalid(lo, &head);
f7db0b28 8413 spin_unlock(&inode->i_lock);
1f18b82c 8414 nfs_commit_inode(inode, 0);
f7db0b28
TM		 8415 pnfs_free_lseg_list(&head);
8416 status = -EAGAIN;
8417 goto out;
b1f69b75 8418 }
183d9e7b 8419
8ac09251 8420 nfs4_sequence_free_slot(&lgp->res.seq_res);
e85d7ee4
TM		 8421 err = nfs4_handle_exception(server, nfs4err, exception);
8422 if (!status) {
8423 if (exception->retry)
8424 status = -EAGAIN;
8425 else
8426 status = err;
8427 }
ee314c2a 8428out:
b1f69b75 8429 dprintk("<-- %s\n", __func__);
183d9e7b 8430 return status;
b1f69b75
AA		 8431}
8432
8554116e
IK		 8433static size_t max_response_pages(struct nfs_server *server)
8434{
8435 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
8436 return nfs_page_array_len(0, max_resp_sz);
8437}
8438
8439static void nfs4_free_pages(struct page **pages, size_t size)
8440{
8441 int i;
8442
8443 if (!pages)
8444 return;
8445
8446 for (i = 0; i < size; i++) {
8447 if (!pages[i])
8448 break;
8449 __free_page(pages[i]);
8450 }
8451 kfree(pages);
8452}
8453
8454static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
8455{
8456 struct page **pages;
8457 int i;
8458
8459 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
8460 if (!pages) {
8461 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
8462 return NULL;
8463 }
8464
8465 for (i = 0; i < size; i++) {
8466 pages[i] = alloc_page(gfp_flags);
8467 if (!pages[i]) {
8468 dprintk("%s: failed to allocate page\n", __func__);
8469 nfs4_free_pages(pages, size);
8470 return NULL;
8471 }
8472 }
8473
8474 return pages;
8475}
8476
b1f69b75
AA		 8477static void nfs4_layoutget_release(void *calldata)
8478{
8479 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 8480 struct inode *inode = lgp->args.inode;
8481 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8482 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8483
8484 dprintk("--> %s\n", __func__);
bd171930 8485 nfs4_sequence_free_slot(&lgp->res.seq_res);
8554116e 8486 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 8487 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 8488 put_nfs_open_context(lgp->args.ctx);
8489 kfree(calldata);
8490 dprintk("<-- %s\n", __func__);
8491}
8492
8493static const struct rpc_call_ops nfs4_layoutget_call_ops = {
8494 .rpc_call_prepare = nfs4_layoutget_prepare,
8495 .rpc_call_done = nfs4_layoutget_done,
8496 .rpc_release = nfs4_layoutget_release,
8497};
8498
a0b0a6e3 8499struct pnfs_layout_segment *
183d9e7b 8500nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags)
b1f69b75 8501{
a47970ff
WAA		 8502 struct inode *inode = lgp->args.inode;
8503 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8504 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8505 struct rpc_task *task;
8506 struct rpc_message msg = {
8507 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
8508 .rpc_argp = &lgp->args,
8509 .rpc_resp = &lgp->res,
6ab59344 8510 .rpc_cred = lgp->cred,
b1f69b75
AA		 8511 };
8512 struct rpc_task_setup task_setup_data = {
8513 .rpc_client = server->client,
8514 .rpc_message = &msg,
8515 .callback_ops = &nfs4_layoutget_call_ops,
8516 .callback_data = lgp,
8517 .flags = RPC_TASK_ASYNC,
8518 };
a0b0a6e3 8519 struct pnfs_layout_segment *lseg = NULL;
bc23676c
TM		 8520 struct nfs4_exception exception = {
8521 .inode = inode,
8522 .timeout = *timeout,
8523 };
b1f69b75
AA		 8524 int status = 0;
8525
8526 dprintk("--> %s\n", __func__);
8527
4bd5a980
PT		 8528 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
8529 pnfs_get_layout_hdr(NFS_I(inode)->layout);
8530
8554116e
IK		 8531 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
8532 if (!lgp->args.layout.pages) {
8533 nfs4_layoutget_release(lgp);
a0b0a6e3 8534 return ERR_PTR(-ENOMEM);
8554116e
IK		 8535 }
8536 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
8537
35124a09 8538 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 8539 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 8540 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 8541
b1f69b75
AA		 8542 task = rpc_run_task(&task_setup_data);
8543 if (IS_ERR(task))
a0b0a6e3 8544 return ERR_CAST(task);
820bf85c 8545 status = rpc_wait_for_completion_task(task);
183d9e7b
JL		 8546 if (status == 0) {
8547 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
8548 *timeout = exception.timeout;
8549 }
8550
1037e6ea
TM		 8551 trace_nfs4_layoutget(lgp->args.ctx,
8552 &lgp->args.range,
8553 &lgp->res.range,
48c9579a 8554 &lgp->res.stateid,
1037e6ea 8555 status);
183d9e7b 8556
085b7a45
WAA		 8557 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8558 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 8559 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 8560 rpc_put_task(task);
8561 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 8562 if (status)
8563 return ERR_PTR(status);
8564 return lseg;
b1f69b75
AA		 8565}
8566
cbe82603
BH		 8567static void
8568nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8569{
8570 struct nfs4_layoutreturn *lrp = calldata;
8571
8572 dprintk("--> %s\n", __func__);
7981c8a6 8573 nfs4_setup_sequence(lrp->clp,
d9afbd1b
TM		 8574 &lrp->args.seq_args,
8575 &lrp->res.seq_res,
8576 task);
cbe82603
BH		 8577}
8578
8579static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8580{
8581 struct nfs4_layoutreturn *lrp = calldata;
8582 struct nfs_server *server;
8583
8584 dprintk("--> %s\n", __func__);
8585
2e80dbe7 8586 if (!nfs41_sequence_process(task, &lrp->res.seq_res))
cbe82603
BH		 8587 return;
8588
8589 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 8590 switch (task->tk_status) {
8591 default:
8592 task->tk_status = 0;
8593 case 0:
8594 break;
8595 case -NFS4ERR_DELAY:
8478eaa1 8596 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 8597 break;
2e80dbe7 8598 nfs4_sequence_free_slot(&lrp->res.seq_res);
d00c5d43 8599 rpc_restart_call_prepare(task);
cbe82603
BH		 8600 return;
8601 }
cbe82603
BH		 8602 dprintk("<-- %s\n", __func__);
8603}
8604
8605static void nfs4_layoutreturn_release(void *calldata)
8606{
8607 struct nfs4_layoutreturn *lrp = calldata;
849b286f 8608 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 8609
8610 dprintk("--> %s\n", __func__);
2a974425 8611 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range,
68f74479 8612 lrp->res.lrs_present ? &lrp->res.stateid : NULL);
2e80dbe7 8613 nfs4_sequence_free_slot(&lrp->res.seq_res);
4d796d75
TM		 8614 if (lrp->ld_private.ops && lrp->ld_private.ops->free)
8615 lrp->ld_private.ops->free(&lrp->ld_private);
2f065ddb
TM		 8616 pnfs_put_layout_hdr(lrp->args.layout);
8617 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 8618 kfree(calldata);
8619 dprintk("<-- %s\n", __func__);
8620}
8621
8622static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8623 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8624 .rpc_call_done = nfs4_layoutreturn_done,
8625 .rpc_release = nfs4_layoutreturn_release,
8626};
8627
6c16605d 8628int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 8629{
8630 struct rpc_task *task;
8631 struct rpc_message msg = {
8632 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8633 .rpc_argp = &lrp->args,
8634 .rpc_resp = &lrp->res,
9556000d 8635 .rpc_cred = lrp->cred,
cbe82603
BH		 8636 };
8637 struct rpc_task_setup task_setup_data = {
1771c577 8638 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8639 .rpc_message = &msg,
8640 .callback_ops = &nfs4_layoutreturn_call_ops,
8641 .callback_data = lrp,
8642 };
6c16605d 8643 int status = 0;
cbe82603 8644
99ade3c7
AE		 8645 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
8646 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
8647 &task_setup_data.rpc_client, &msg);
8648
cbe82603 8649 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8650 if (!sync) {
8651 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8652 if (!lrp->inode) {
8653 nfs4_layoutreturn_release(lrp);
8654 return -EAGAIN;
8655 }
8656 task_setup_data.flags |= RPC_TASK_ASYNC;
8657 }
a9c92d6b 8658 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8659 task = rpc_run_task(&task_setup_data);
8660 if (IS_ERR(task))
8661 return PTR_ERR(task);
5a0ec8ac
TM		 8662 if (sync)
8663 status = task->tk_status;
48c9579a 8664 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
cbe82603
BH		 8665 dprintk("<-- %s status=%d\n", __func__, status);
8666 rpc_put_task(task);
8667 return status;
8668}
8669
b1f69b75 8670static int
cd5875fe
TM		 8671_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8672 struct pnfs_device *pdev,
8673 struct rpc_cred *cred)
b1f69b75
AA		 8674{
8675 struct nfs4_getdeviceinfo_args args = {
8676 .pdev = pdev,
4e590803
TM		 8677 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8678 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8679 };
8680 struct nfs4_getdeviceinfo_res res = {
8681 .pdev = pdev,
8682 };
8683 struct rpc_message msg = {
8684 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8685 .rpc_argp = &args,
8686 .rpc_resp = &res,
cd5875fe 8687 .rpc_cred = cred,
b1f69b75
AA		 8688 };
8689 int status;
8690
8691 dprintk("--> %s\n", __func__);
7c513058 8692 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8693 if (res.notification & ~args.notify_types)
8694 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8695 if (res.notification != args.notify_types)
8696 pdev->nocache = 1;
4e590803 8697
b1f69b75
AA		 8698 dprintk("<-- %s status=%d\n", __func__, status);
8699
8700 return status;
8701}
8702
cd5875fe
TM		 8703int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8704 struct pnfs_device *pdev,
8705 struct rpc_cred *cred)
b1f69b75
AA		 8706{
8707 struct nfs4_exception exception = { };
8708 int err;
8709
8710 do {
8711 err = nfs4_handle_exception(server,
cd5875fe 8712 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8713 &exception);
8714 } while (exception.retry);
8715 return err;
8716}
8717EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8718
863a3c6c
AA		 8719static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8720{
8721 struct nfs4_layoutcommit_data *data = calldata;
8722 struct nfs_server *server = NFS_SERVER(data->args.inode);
8723
7981c8a6 8724 nfs4_setup_sequence(server->nfs_client,
d9afbd1b
TM		 8725 &data->args.seq_args,
8726 &data->res.seq_res,
8727 task);
863a3c6c
AA		 8728}
8729
8730static void
8731nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8732{
8733 struct nfs4_layoutcommit_data *data = calldata;
8734 struct nfs_server *server = NFS_SERVER(data->args.inode);
8735
6ba7db34 8736 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8737 return;
8738
8739 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8740 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8741 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8742 case -NFS4ERR_BADLAYOUT: /* no layout */
8743 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8744 task->tk_status = 0;
e59d27e0 8745 case 0:
e59d27e0
TM		 8746 break;
8747 default:
8478eaa1 8748 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8749 rpc_restart_call_prepare(task);
8750 return;
8751 }
8752 }
863a3c6c
AA		 8753}
8754
8755static void nfs4_layoutcommit_release(void *calldata)
8756{
8757 struct nfs4_layoutcommit_data *data = calldata;
8758
db29c089 8759 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8760 nfs_post_op_update_inode_force_wcc(data->args.inode,
8761 data->res.fattr);
863a3c6c 8762 put_rpccred(data->cred);
472e2594 8763 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8764 kfree(data);
8765}
8766
8767static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8768 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8769 .rpc_call_done = nfs4_layoutcommit_done,
8770 .rpc_release = nfs4_layoutcommit_release,
8771};
8772
8773int
ef311537 8774nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8775{
8776 struct rpc_message msg = {
8777 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8778 .rpc_argp = &data->args,
8779 .rpc_resp = &data->res,
8780 .rpc_cred = data->cred,
8781 };
8782 struct rpc_task_setup task_setup_data = {
8783 .task = &data->task,
8784 .rpc_client = NFS_CLIENT(data->args.inode),
8785 .rpc_message = &msg,
8786 .callback_ops = &nfs4_layoutcommit_ops,
8787 .callback_data = data,
863a3c6c
AA		 8788 };
8789 struct rpc_task *task;
8790 int status = 0;
8791
b4839ebe
KM		 8792 dprintk("NFS: initiating layoutcommit call. sync %d "
8793 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8794 data->args.lastbytewritten,
8795 data->args.inode->i_ino);
8796
472e2594
TM		 8797 if (!sync) {
8798 data->inode = nfs_igrab_and_active(data->args.inode);
8799 if (data->inode == NULL) {
8800 nfs4_layoutcommit_release(data);
8801 return -EAGAIN;
8802 }
8803 task_setup_data.flags = RPC_TASK_ASYNC;
8804 }
a9c92d6b 8805 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8806 task = rpc_run_task(&task_setup_data);
8807 if (IS_ERR(task))
8808 return PTR_ERR(task);
472e2594
TM		 8809 if (sync)
8810 status = task->tk_status;
48c9579a 8811 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
863a3c6c
AA		 8812 dprintk("%s: status %d\n", __func__, status);
8813 rpc_put_task(task);
8814 return status;
8815}
fca78d6d 8816
97431204
AA		 8817/**
8818 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8819 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8820 */
fca78d6d
BS		 8821static int
8822_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8823 struct nfs_fsinfo *info,
8824 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8825{
8826 struct nfs41_secinfo_no_name_args args = {
8827 .style = SECINFO_STYLE_CURRENT_FH,
8828 };
8829 struct nfs4_secinfo_res res = {
8830 .flavors = flavors,
8831 };
8832 struct rpc_message msg = {
8833 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8834 .rpc_argp = &args,
8835 .rpc_resp = &res,
8836 };
b1b3e136 8837 struct rpc_clnt *clnt = server->client;
7cb852df 8838 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8839 int status;
8840
8841 if (use_integrity) {
8842 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8843 cred = nfs4_get_clid_cred(server->nfs_client);
8844 msg.rpc_cred = cred;
b1b3e136
WAA		 8845 }
8846
8847 dprintk("--> %s\n", __func__);
8848 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8849 &res.seq_res, 0);
8850 dprintk("<-- %s status=%d\n", __func__, status);
8851
7cb852df
WAA		 8852 if (cred)
8853 put_rpccred(cred);
b1b3e136
WAA		 8854
8855 return status;
fca78d6d
BS		 8856}
8857
8858static int
8859nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8860 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8861{
8862 struct nfs4_exception exception = { };
8863 int err;
8864 do {
b1b3e136
WAA		 8865 /* first try using integrity protection */
8866 err = -NFS4ERR_WRONGSEC;
8867
8868 /* try to use integrity protection with machine cred */
8869 if (_nfs4_is_integrity_protected(server->nfs_client))
8870 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8871 flavors, true);
8872
8873 /*
8874 * if unable to use integrity protection, or SECINFO with
8875 * integrity protection returns NFS4ERR_WRONGSEC (which is
8876 * disallowed by spec, but exists in deployed servers) use
8877 * the current filesystem's rpc_client and the user cred.
8878 */
8879 if (err == -NFS4ERR_WRONGSEC)
8880 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8881 flavors, false);
8882
fca78d6d
BS		 8883 switch (err) {
8884 case 0:
8885 case -NFS4ERR_WRONGSEC:
78b19bae 8886 case -ENOTSUPP:
05e9cfb4 8887 goto out;
fca78d6d
BS		 8888 default:
8889 err = nfs4_handle_exception(server, err, &exception);
8890 }
8891 } while (exception.retry);
05e9cfb4 8892out:
fca78d6d
BS		 8893 return err;
8894}
8895
8896static int
8897nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8898 struct nfs_fsinfo *info)
8899{
8900 int err;
8901 struct page *page;
367156d9 8902 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8903 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8904 struct nfs4_secinfo4 *secinfo;
8905 int i;
fca78d6d
BS		 8906
8907 page = alloc_page(GFP_KERNEL);
8908 if (!page) {
8909 err = -ENOMEM;
8910 goto out;
8911 }
8912
8913 flavors = page_address(page);
8914 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8915
8916 /*
8917 * Fall back on "guess and check" method if
8918 * the server doesn't support SECINFO_NO_NAME
8919 */
78b19bae 8920 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8921 err = nfs4_find_root_sec(server, fhandle, info);
8922 goto out_freepage;
8923 }
8924 if (err)
8925 goto out_freepage;
8926
58a8cf12
WAA		 8927 for (i = 0; i < flavors->num_flavors; i++) {
8928 secinfo = &flavors->flavors[i];
8929
8930 switch (secinfo->flavor) {
8931 case RPC_AUTH_NULL:
8932 case RPC_AUTH_UNIX:
8933 case RPC_AUTH_GSS:
8934 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8935 &secinfo->flavor_info);
8936 break;
8937 default:
8938 flavor = RPC_AUTH_MAXFLAVOR;
8939 break;
8940 }
8941
4d4b69dd
WAA		 8942 if (!nfs_auth_info_match(&server->auth_info, flavor))
8943 flavor = RPC_AUTH_MAXFLAVOR;
8944
58a8cf12
WAA		 8945 if (flavor != RPC_AUTH_MAXFLAVOR) {
8946 err = nfs4_lookup_root_sec(server, fhandle,
8947 info, flavor);
8948 if (!err)
8949 break;
8950 }
8951 }
8952
8953 if (flavor == RPC_AUTH_MAXFLAVOR)
8954 err = -EPERM;
fca78d6d
BS		 8955
8956out_freepage:
8957 put_page(page);
8958 if (err == -EACCES)
8959 return -EPERM;
8960out:
8961 return err;
8962}
1cab0652 8963
ab7cb0df
TM		 8964static int _nfs41_test_stateid(struct nfs_server *server,
8965 nfs4_stateid *stateid,
8966 struct rpc_cred *cred)
7d974794
BS		 8967{
8968 int status;
8969 struct nfs41_test_stateid_args args = {
1cab0652 8970 .stateid = stateid,
7d974794
BS		 8971 };
8972 struct nfs41_test_stateid_res res;
8973 struct rpc_message msg = {
8974 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8975 .rpc_argp = &args,
8976 .rpc_resp = &res,
ab7cb0df 8977 .rpc_cred = cred,
7d974794 8978 };
3787d506
WAA		 8979 struct rpc_clnt *rpc_client = server->client;
8980
8981 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8982 &rpc_client, &msg);
1cab0652 8983
38527b15 8984 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8985 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8986 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8987 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8988 &args.seq_args, &res.seq_res);
38527b15
CL		 8989 if (status != NFS_OK) {
8990 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8991 return status;
38527b15
CL		 8992 }
8993 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8994 return -res.status;
7d974794
BS		 8995}
8996
43912bbb
TM		 8997static void nfs4_handle_delay_or_session_error(struct nfs_server *server,
8998 int err, struct nfs4_exception *exception)
8999{
9000 exception->retry = 0;
9001 switch(err) {
9002 case -NFS4ERR_DELAY:
76e8a1bd 9003 case -NFS4ERR_RETRY_UNCACHED_REP:
43912bbb
TM		 9004 nfs4_handle_exception(server, err, exception);
9005 break;
9006 case -NFS4ERR_BADSESSION:
9007 case -NFS4ERR_BADSLOT:
9008 case -NFS4ERR_BAD_HIGH_SLOT:
9009 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
9010 case -NFS4ERR_DEADSESSION:
9011 nfs4_do_handle_exception(server, err, exception);
9012 }
9013}
9014
38527b15
CL		 9015/**
9016 * nfs41_test_stateid - perform a TEST_STATEID operation
9017 *
9018 * @server: server / transport on which to perform the operation
9019 * @stateid: state ID to test
ab7cb0df 9020 * @cred: credential
38527b15
CL		 9021 *
9022 * Returns NFS_OK if the server recognizes that "stateid" is valid.
9023 * Otherwise a negative NFS4ERR value is returned if the operation
9024 * failed or the state ID is not currently valid.
9025 */
ab7cb0df
TM		 9026static int nfs41_test_stateid(struct nfs_server *server,
9027 nfs4_stateid *stateid,
9028 struct rpc_cred *cred)
7d974794
BS		 9029{
9030 struct nfs4_exception exception = { };
9031 int err;
9032 do {
ab7cb0df 9033 err = _nfs41_test_stateid(server, stateid, cred);
43912bbb 9034 nfs4_handle_delay_or_session_error(server, err, &exception);
7d974794
BS		 9035 } while (exception.retry);
9036 return err;
9037}
9aeda35f 9038
7c1d5fae
TM		 9039struct nfs_free_stateid_data {
9040 struct nfs_server *server;
9041 struct nfs41_free_stateid_args args;
9aeda35f 9042 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 9043};
9044
9045static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
9046{
9047 struct nfs_free_stateid_data *data = calldata;
7981c8a6 9048 nfs4_setup_sequence(data->server->nfs_client,
7c1d5fae
TM		 9049 &data->args.seq_args,
9050 &data->res.seq_res,
9051 task);
9052}
9053
9054static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
9055{
9056 struct nfs_free_stateid_data *data = calldata;
9057
9058 nfs41_sequence_done(task, &data->res.seq_res);
9059
9060 switch (task->tk_status) {
9061 case -NFS4ERR_DELAY:
8478eaa1 9062 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 9063 rpc_restart_call_prepare(task);
9064 }
9065}
9066
9067static void nfs41_free_stateid_release(void *calldata)
9068{
9069 kfree(calldata);
9070}
9071
17f26b12 9072static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 9073 .rpc_call_prepare = nfs41_free_stateid_prepare,
9074 .rpc_call_done = nfs41_free_stateid_done,
9075 .rpc_release = nfs41_free_stateid_release,
9076};
9077
9078static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
f0b0bf88 9079 const nfs4_stateid *stateid,
ab7cb0df 9080 struct rpc_cred *cred,
7c1d5fae
TM		 9081 bool privileged)
9082{
9aeda35f
BS		 9083 struct rpc_message msg = {
9084 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 9085 .rpc_cred = cred,
9aeda35f 9086 };
7c1d5fae
TM		 9087 struct rpc_task_setup task_setup = {
9088 .rpc_client = server->client,
9089 .rpc_message = &msg,
9090 .callback_ops = &nfs41_free_stateid_ops,
9091 .flags = RPC_TASK_ASYNC,
9092 };
9093 struct nfs_free_stateid_data *data;
9aeda35f 9094
3787d506
WAA		 9095 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9096 &task_setup.rpc_client, &msg);
9097
38527b15 9098 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 9099 data = kmalloc(sizeof(*data), GFP_NOFS);
9100 if (!data)
9101 return ERR_PTR(-ENOMEM);
9102 data->server = server;
9103 nfs4_stateid_copy(&data->args.stateid, stateid);
9104
9105 task_setup.callback_data = data;
9106
9107 msg.rpc_argp = &data->args;
9108 msg.rpc_resp = &data->res;
76e8a1bd 9109 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
7c1d5fae
TM		 9110 if (privileged)
9111 nfs4_set_sequence_privileged(&data->args.seq_args);
9112
9113 return rpc_run_task(&task_setup);
9aeda35f
BS		 9114}
9115
38527b15
CL		 9116/**
9117 * nfs41_free_stateid - perform a FREE_STATEID operation
9118 *
9119 * @server: server / transport on which to perform the operation
9120 * @stateid: state ID to release
ab7cb0df 9121 * @cred: credential
f0b0bf88 9122 * @is_recovery: set to true if this call needs to be privileged
38527b15 9123 *
f0b0bf88 9124 * Note: this function is always asynchronous.
38527b15 9125 */
ab7cb0df 9126static int nfs41_free_stateid(struct nfs_server *server,
f0b0bf88
TM		 9127 const nfs4_stateid *stateid,
9128 struct rpc_cred *cred,
9129 bool is_recovery)
9aeda35f 9130{
7c1d5fae 9131 struct rpc_task *task;
7c1d5fae 9132
f0b0bf88 9133 task = _nfs41_free_stateid(server, stateid, cred, is_recovery);
7c1d5fae
TM		 9134 if (IS_ERR(task))
9135 return PTR_ERR(task);
7c1d5fae 9136 rpc_put_task(task);
f0b0bf88 9137 return 0;
9aeda35f 9138}
36281caa 9139
f1cdae87
JL		 9140static void
9141nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf 9142{
ab7cb0df 9143 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 9144
f0b0bf88 9145 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf 9146 nfs4_free_lock_state(server, lsp);
c8b2d0bf
TM		 9147}
9148
36281caa
TM		 9149static bool nfs41_match_stateid(const nfs4_stateid *s1,
9150 const nfs4_stateid *s2)
9151{
93b717fd
TM		 9152 if (s1->type != s2->type)
9153 return false;
9154
2d2f24ad 9155 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 9156 return false;
9157
2d2f24ad 9158 if (s1->seqid == s2->seqid)
36281caa 9159 return true;
36281caa 9160
045c5519 9161 return s1->seqid == 0 || s2->seqid == 0;
36281caa
TM		 9162}
9163
557134a3
AA		 9164#endif /* CONFIG_NFS_V4_1 */
9165
36281caa
TM		 9166static bool nfs4_match_stateid(const nfs4_stateid *s1,
9167 const nfs4_stateid *s2)
9168{
f597c537 9169 return nfs4_stateid_match(s1, s2);
36281caa
TM		 9170}
9171
9172
17280175 9173static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 9174 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 9175 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 9176 .recover_open = nfs4_open_reclaim,
9177 .recover_lock = nfs4_lock_reclaim,
591d71cb 9178 .establish_clid = nfs4_init_clientid,
05f4c350 9179 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 9180};
9181
591d71cb 9182#if defined(CONFIG_NFS_V4_1)
17280175 9183static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 9184 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9185 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9186 .recover_open = nfs4_open_reclaim,
9187 .recover_lock = nfs4_lock_reclaim,
4d643d1d 9188 .establish_clid = nfs41_init_clientid,
fce5c838 9189 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 9190 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 9191};
9192#endif /* CONFIG_NFS_V4_1 */
9193
17280175 9194static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 9195 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9196 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 9197 .recover_open = nfs40_open_expired,
591d71cb
AA		 9198 .recover_lock = nfs4_lock_expired,
9199 .establish_clid = nfs4_init_clientid,
9200};
9201
9202#if defined(CONFIG_NFS_V4_1)
17280175 9203static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 9204 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 9205 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 9206 .recover_open = nfs41_open_expired,
9207 .recover_lock = nfs41_lock_expired,
4d643d1d 9208 .establish_clid = nfs41_init_clientid,
1da177e4 9209};
591d71cb 9210#endif /* CONFIG_NFS_V4_1 */
1da177e4 9211
17280175 9212static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 9213 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 9214 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 9215 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 9216};
9217
9218#if defined(CONFIG_NFS_V4_1)
17280175 9219static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 9220 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 9221 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 9222 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 9223};
9224#endif
9225
ec011fe8 9226static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 9227 .get_locations = _nfs40_proc_get_locations,
44c99933 9228 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 9229};
9230
9231#if defined(CONFIG_NFS_V4_1)
9232static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 9233 .get_locations = _nfs41_proc_get_locations,
44c99933 9234 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 9235};
9236#endif /* CONFIG_NFS_V4_1 */
9237
97dc1359
TM		 9238static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
9239 .minor_version = 0,
39c6daae
TM		 9240 .init_caps = NFS_CAP_READDIRPLUS
9241 | NFS_CAP_ATOMIC_OPEN
39c6daae 9242 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 9243 .init_client = nfs40_init_client,
9244 .shutdown_client = nfs40_shutdown_client,
36281caa 9245 .match_stateid = nfs4_match_stateid,
fca78d6d 9246 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 9247 .free_lock_state = nfs4_release_lockowner,
45870d69 9248 .test_and_free_expired = nfs40_test_and_free_expired_stateid,
63f5f796 9249 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 9250 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 9251 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
9252 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
9253 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 9254 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 9255};
9256
9257#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 9258static struct nfs_seqid *
9259nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
9260{
9261 return NULL;
9262}
9263
97dc1359
TM		 9264static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
9265 .minor_version = 1,
39c6daae
TM		 9266 .init_caps = NFS_CAP_READDIRPLUS
9267 | NFS_CAP_ATOMIC_OPEN
3b66486c 9268 | NFS_CAP_POSIX_LOCK
49f9a0fa 9269 | NFS_CAP_STATEID_NFSV41
e983120e 9270 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 9271 .init_client = nfs41_init_client,
9272 .shutdown_client = nfs41_shutdown_client,
36281caa 9273 .match_stateid = nfs41_match_stateid,
fca78d6d 9274 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 9275 .free_lock_state = nfs41_free_lock_state,
45870d69 9276 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 9277 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 9278 .session_trunk = nfs4_test_session_trunk,
9915ea7e 9279 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 9280 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9281 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9282 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 9283 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 9284};
9285#endif
9286
42c2c424
SD		 9287#if defined(CONFIG_NFS_V4_2)
9288static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
9289 .minor_version = 2,
7017310a
BS		 9290 .init_caps = NFS_CAP_READDIRPLUS
9291 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 9292 | NFS_CAP_POSIX_LOCK
9293 | NFS_CAP_STATEID_NFSV41
e983120e 9294 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 9295 | NFS_CAP_ALLOCATE
2e72448b 9296 | NFS_CAP_COPY
624bd5b7 9297 | NFS_CAP_DEALLOCATE
6c5a0d89 9298 | NFS_CAP_SEEK
e5341f3a
PT		 9299 | NFS_CAP_LAYOUTSTATS
9300 | NFS_CAP_CLONE,
abf79bb3
CL		 9301 .init_client = nfs41_init_client,
9302 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 9303 .match_stateid = nfs41_match_stateid,
9304 .find_root_sec = nfs41_find_root_sec,
7017310a 9305 .free_lock_state = nfs41_free_lock_state,
9915ea7e 9306 .call_sync_ops = &nfs41_call_sync_ops,
45870d69 9307 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 9308 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 9309 .session_trunk = nfs4_test_session_trunk,
42c2c424
SD		 9310 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9311 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9312 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 9313 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 9314};
9315#endif
9316
97dc1359
TM		 9317const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
9318 [0] = &nfs_v4_0_minor_ops,
9319#if defined(CONFIG_NFS_V4_1)
9320 [1] = &nfs_v4_1_minor_ops,
9321#endif
42c2c424
SD		 9322#if defined(CONFIG_NFS_V4_2)
9323 [2] = &nfs_v4_2_minor_ops,
9324#endif
97dc1359
TM		 9325};
9326
13997823 9327static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
c4803c49
AG		 9328{
9329 ssize_t error, error2;
9330
9331 error = generic_listxattr(dentry, list, size);
9332 if (error < 0)
9333 return error;
9334 if (list) {
9335 list += error;
9336 size -= error;
9337 }
9338
9339 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
9340 if (error2 < 0)
9341 return error2;
9342 return error + error2;
9343}
9344
17f26b12 9345static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 9346 .create = nfs_create,
9347 .lookup = nfs_lookup,
9348 .atomic_open = nfs_atomic_open,
9349 .link = nfs_link,
9350 .unlink = nfs_unlink,
9351 .symlink = nfs_symlink,
9352 .mkdir = nfs_mkdir,
9353 .rmdir = nfs_rmdir,
9354 .mknod = nfs_mknod,
9355 .rename = nfs_rename,
9356 .permission = nfs_permission,
9357 .getattr = nfs_getattr,
9358 .setattr = nfs_setattr,
c4803c49 9359 .listxattr = nfs4_listxattr,
73a79706
BS		 9360};
9361
92e1d5be 9362static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 9363 .permission = nfs_permission,
9364 .getattr = nfs_getattr,
9365 .setattr = nfs_setattr,
c4803c49 9366 .listxattr = nfs4_listxattr,
6b3b5496
BF		 9367};
9368
509de811 9369const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 9370 .version = 4, /* protocol version */
9371 .dentry_ops = &nfs4_dentry_operations,
9372 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 9373 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 9374 .file_ops = &nfs4_file_operations,
1da177e4 9375 .getroot = nfs4_proc_get_root,
281cad46 9376 .submount = nfs4_submount,
ff9099f2 9377 .try_mount = nfs4_try_mount,
1da177e4
LT		 9378 .getattr = nfs4_proc_getattr,
9379 .setattr = nfs4_proc_setattr,
9380 .lookup = nfs4_proc_lookup,
5b5faaf6 9381 .lookupp = nfs4_proc_lookupp,
1da177e4
LT		 9382 .access = nfs4_proc_access,
9383 .readlink = nfs4_proc_readlink,
1da177e4
LT		 9384 .create = nfs4_proc_create,
9385 .remove = nfs4_proc_remove,
9386 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 9387 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 9388 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 9389 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 9390 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 9391 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 9392 .link = nfs4_proc_link,
9393 .symlink = nfs4_proc_symlink,
9394 .mkdir = nfs4_proc_mkdir,
9395 .rmdir = nfs4_proc_remove,
9396 .readdir = nfs4_proc_readdir,
9397 .mknod = nfs4_proc_mknod,
9398 .statfs = nfs4_proc_statfs,
9399 .fsinfo = nfs4_proc_fsinfo,
9400 .pathconf = nfs4_proc_pathconf,
e9326dca 9401 .set_capabilities = nfs4_server_capabilities,
1da177e4 9402 .decode_dirent = nfs4_decode_dirent,
a4cdda59 9403 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 9404 .read_setup = nfs4_proc_read_setup,
ec06c096 9405 .read_done = nfs4_read_done,
1da177e4 9406 .write_setup = nfs4_proc_write_setup,
788e7a89 9407 .write_done = nfs4_write_done,
1da177e4 9408 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 9409 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 9410 .commit_done = nfs4_commit_done,
1da177e4 9411 .lock = nfs4_proc_lock,
e50a1c2e 9412 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 9413 .close_context = nfs4_close_context,
2b484297 9414 .open_context = nfs4_atomic_open,
011e2a7f 9415 .have_delegation = nfs4_have_delegation,
57ec14c5 9416 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 9417 .alloc_client = nfs4_alloc_client,
45a52a02 9418 .init_client = nfs4_init_client,
cdb7eced 9419 .free_client = nfs4_free_client,
1179acc6
BS		 9420 .create_server = nfs4_create_server,
9421 .clone_server = nfs_clone_server,
1da177e4
LT		 9422};
9423
64c2ce8b 9424static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
98e9cb57 9425 .name = XATTR_NAME_NFSV4_ACL,
64c2ce8b
AK		 9426 .list = nfs4_xattr_list_nfs4_acl,
9427 .get = nfs4_xattr_get_nfs4_acl,
9428 .set = nfs4_xattr_set_nfs4_acl,
9429};
9430
9431const struct xattr_handler *nfs4_xattr_handlers[] = {
9432 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 9433#ifdef CONFIG_NFS_V4_SECURITY_LABEL
9434 &nfs4_xattr_nfs4_label_handler,
9435#endif
64c2ce8b
AK		 9436 NULL
9437};
9438
1da177e4
LT		 9439/*
9440 * Local variables:
9441 * c-basic-offset: 8
9442 * End:
9443 */
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