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NFSv4: Call update_changeattr() from _nfs4_proc_open only if a file was created
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
64c2ce8b 54#include <linux/xattr.h>
c7a360b0 55#include <linux/utsname.h>
d310310c 56#include <linux/freezer.h>
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{
0dbb4c67 278 __be32 *start, *p;
1da177e4 279
1da177e4 280 if (cookie > 2) {
b7ef1956 281 readdir->cookie = cookie;
1da177e4
LT		 282 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
283 return;
284 }
285
286 readdir->cookie = 0;
287 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
288 if (cookie == 2)
289 return;
290
291 /*
292 * NFSv4 servers do not return entries for '.' and '..'
293 * Therefore, we fake these entries here. We let '.'
294 * have cookie 0 and '..' have cookie 1. Note that
295 * when talking to the server, we always send cookie 0
296 * instead of 1 or 2.
297 */
2b86ce2d 298 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 299
300 if (cookie == 0) {
301 *p++ = xdr_one; /* next */
302 *p++ = xdr_zero; /* cookie, first word */
303 *p++ = xdr_one; /* cookie, second word */
304 *p++ = xdr_one; /* entry len */
305 memcpy(p, ".\0\0\0", 4); /* entry */
306 p++;
307 *p++ = xdr_one; /* bitmap length */
308 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
309 *p++ = htonl(8); /* attribute buffer length */
2b0143b5 310 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
1da177e4
LT		 311 }
312
313 *p++ = xdr_one; /* next */
314 *p++ = xdr_zero; /* cookie, first word */
315 *p++ = xdr_two; /* cookie, second word */
316 *p++ = xdr_two; /* entry len */
317 memcpy(p, "..\0\0", 4); /* entry */
318 p++;
319 *p++ = xdr_one; /* bitmap length */
320 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
321 *p++ = htonl(8); /* attribute buffer length */
2b0143b5 322 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
1da177e4
LT		 323
324 readdir->pgbase = (char *)p - (char *)start;
325 readdir->count -= readdir->pgbase;
2b86ce2d 326 kunmap_atomic(start);
1da177e4
LT		 327}
328
26d36301
TM		 329static void nfs4_test_and_free_stateid(struct nfs_server *server,
330 nfs4_stateid *stateid,
331 struct rpc_cred *cred)
332{
333 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops;
334
335 ops->test_and_free_expired(server, stateid, cred);
336}
337
338static void __nfs4_free_revoked_stateid(struct nfs_server *server,
339 nfs4_stateid *stateid,
340 struct rpc_cred *cred)
341{
342 stateid->type = NFS4_REVOKED_STATEID_TYPE;
343 nfs4_test_and_free_stateid(server, stateid, cred);
344}
345
346static void nfs4_free_revoked_stateid(struct nfs_server *server,
347 const nfs4_stateid *stateid,
348 struct rpc_cred *cred)
349{
350 nfs4_stateid tmp;
351
352 nfs4_stateid_copy(&tmp, stateid);
353 __nfs4_free_revoked_stateid(server, &tmp, cred);
354}
355
8478eaa1
N		 356static long nfs4_update_delay(long *timeout)
357{
358 long ret;
359 if (!timeout)
360 return NFS4_POLL_RETRY_MAX;
361 if (*timeout <= 0)
362 *timeout = NFS4_POLL_RETRY_MIN;
363 if (*timeout > NFS4_POLL_RETRY_MAX)
364 *timeout = NFS4_POLL_RETRY_MAX;
365 ret = *timeout;
366 *timeout <<= 1;
367 return ret;
368}
369
65de872e
TM		 370static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
371{
372 int res = 0;
373
374 might_sleep();
375
8478eaa1
N		 376 freezable_schedule_timeout_killable_unsafe(
377 nfs4_update_delay(timeout));
65de872e
TM		 378 if (fatal_signal_pending(current))
379 res = -ERESTARTSYS;
65de872e
TM		 380 return res;
381}
382
383/* This is the error handling routine for processes that are allowed
384 * to sleep.
385 */
b3c2aa07
TM		 386static int nfs4_do_handle_exception(struct nfs_server *server,
387 int errorcode, struct nfs4_exception *exception)
65de872e
TM		 388{
389 struct nfs_client *clp = server->nfs_client;
9e33bed5 390 struct nfs4_state *state = exception->state;
8487c479 391 const nfs4_stateid *stateid = exception->stateid;
3114ea7a 392 struct inode *inode = exception->inode;
65de872e
TM		 393 int ret = errorcode;
394
b3c2aa07
TM		 395 exception->delay = 0;
396 exception->recovering = 0;
65de872e 397 exception->retry = 0;
272289a3
TM		 398
399 if (stateid == NULL && state != NULL)
400 stateid = &state->stateid;
401
65de872e
TM		 402 switch(errorcode) {
403 case 0:
404 return 0;
5ba12443
TM		 405 case -NFS4ERR_DELEG_REVOKED:
406 case -NFS4ERR_ADMIN_REVOKED:
272289a3 407 case -NFS4ERR_EXPIRED:
5ba12443 408 case -NFS4ERR_BAD_STATEID:
272289a3
TM		 409 if (inode != NULL && stateid != NULL) {
410 nfs_inode_find_state_and_recover(inode,
411 stateid);
412 goto wait_on_recovery;
413 }
414 case -NFS4ERR_OPENMODE:
8487c479
TM		 415 if (inode) {
416 int err;
417
418 err = nfs_async_inode_return_delegation(inode,
419 stateid);
420 if (err == 0)
421 goto wait_on_recovery;
422 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) {
423 exception->retry = 1;
424 break;
425 }
426 }
3114ea7a
TM		 427 if (state == NULL)
428 break;
5d422301
TM		 429 ret = nfs4_schedule_stateid_recovery(server, state);
430 if (ret < 0)
431 break;
3114ea7a 432 goto wait_on_recovery;
65de872e 433 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 434 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 435 nfs4_schedule_lease_recovery(clp);
436 goto wait_on_recovery;
519ae255
CL		 437 case -NFS4ERR_MOVED:
438 ret = nfs4_schedule_migration_recovery(server);
439 if (ret < 0)
440 break;
441 goto wait_on_recovery;
8ef2f8d4
CL		 442 case -NFS4ERR_LEASE_MOVED:
443 nfs4_schedule_lease_moved_recovery(clp);
444 goto wait_on_recovery;
03391693 445#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 446 case -NFS4ERR_BADSESSION:
447 case -NFS4ERR_BADSLOT:
448 case -NFS4ERR_BAD_HIGH_SLOT:
449 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
450 case -NFS4ERR_DEADSESSION:
451 case -NFS4ERR_SEQ_FALSE_RETRY:
452 case -NFS4ERR_SEQ_MISORDERED:
453 dprintk("%s ERROR: %d Reset session\n", __func__,
454 errorcode);
9f594791 455 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 456 goto wait_on_recovery;
03391693 457#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 458 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 459 if (exception->timeout > HZ) {
460 /* We have retried a decent amount, time to
461 * fail
462 */
463 ret = -EBUSY;
464 break;
465 }
65de872e 466 case -NFS4ERR_DELAY:
2598ed34
TM		 467 nfs_inc_server_stats(server, NFSIOS_DELAY);
468 case -NFS4ERR_GRACE:
e85d7ee4 469 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b 470 case -NFS4ERR_RECALLCONFLICT:
b3c2aa07
TM		 471 exception->delay = 1;
472 return 0;
473
a8a4ae3a 474 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 475 case -NFS4ERR_OLD_STATEID:
476 exception->retry = 1;
b064eca2
TM		 477 break;
478 case -NFS4ERR_BADOWNER:
479 /* The following works around a Linux server bug! */
480 case -NFS4ERR_BADNAME:
481 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
482 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
483 exception->retry = 1;
484 printk(KERN_WARNING "NFS: v4 server %s "
485 "does not accept raw "
486 "uid/gids. "
487 "Reenabling the idmapper.\n",
488 server->nfs_client->cl_hostname);
489 }
65de872e
TM		 490 }
491 /* We failed to handle the error */
492 return nfs4_map_errors(ret);
0400a6b0 493wait_on_recovery:
b3c2aa07
TM		 494 exception->recovering = 1;
495 return 0;
496}
497
498/* This is the error handling routine for processes that are allowed
499 * to sleep.
500 */
501int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
502{
503 struct nfs_client *clp = server->nfs_client;
504 int ret;
505
506 ret = nfs4_do_handle_exception(server, errorcode, exception);
507 if (exception->delay) {
508 ret = nfs4_delay(server->client, &exception->timeout);
509 goto out_retry;
510 }
511 if (exception->recovering) {
512 ret = nfs4_wait_clnt_recover(clp);
513 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
514 return -EIO;
515 goto out_retry;
516 }
517 return ret;
518out_retry:
a2c0b9e2
TM		 519 if (ret == 0)
520 exception->retry = 1;
521 return ret;
65de872e
TM		 522}
523
037fc980
TM		 524static int
525nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
526 int errorcode, struct nfs4_exception *exception)
527{
528 struct nfs_client *clp = server->nfs_client;
529 int ret;
530
531 ret = nfs4_do_handle_exception(server, errorcode, exception);
532 if (exception->delay) {
533 rpc_delay(task, nfs4_update_delay(&exception->timeout));
534 goto out_retry;
535 }
536 if (exception->recovering) {
537 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
538 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
539 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
540 goto out_retry;
541 }
519ae255 542 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
037fc980
TM		 543 ret = -EIO;
544 return ret;
545out_retry:
a2c0b9e2
TM		 546 if (ret == 0)
547 exception->retry = 1;
548 return ret;
65de872e
TM		 549}
550
037fc980
TM		 551static int
552nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
553 struct nfs4_state *state, long *timeout)
554{
555 struct nfs4_exception exception = {
556 .state = state,
557 };
558
559 if (task->tk_status >= 0)
560 return 0;
561 if (timeout)
562 exception.timeout = *timeout;
563 task->tk_status = nfs4_async_handle_exception(task, server,
564 task->tk_status,
565 &exception);
566 if (exception.delay && timeout)
567 *timeout = exception.timeout;
568 if (exception.retry)
569 return -EAGAIN;
570 return 0;
571}
572
a5250def
WAA		 573/*
574 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
575 * or 'false' otherwise.
576 */
577static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
578{
579 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
580
581 if (flavor == RPC_AUTH_GSS_KRB5I ||
582 flavor == RPC_AUTH_GSS_KRB5P)
583 return true;
584
585 return false;
586}
65de872e 587
452e9352 588static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 589{
1da177e4
LT		 590 spin_lock(&clp->cl_lock);
591 if (time_before(clp->cl_last_renewal,timestamp))
592 clp->cl_last_renewal = timestamp;
593 spin_unlock(&clp->cl_lock);
594}
595
452e9352
TM		 596static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
597{
be824167
TM		 598 struct nfs_client *clp = server->nfs_client;
599
600 if (!nfs4_has_session(clp))
601 do_renew_lease(clp, timestamp);
452e9352
TM		 602}
603
2a3eb2b9
CL		 604struct nfs4_call_sync_data {
605 const struct nfs_server *seq_server;
606 struct nfs4_sequence_args *seq_args;
607 struct nfs4_sequence_res *seq_res;
608};
609
be3a5d23
TM		 610void nfs4_init_sequence(struct nfs4_sequence_args *args,
611 struct nfs4_sequence_res *res, int cache_reply)
a9c92d6b
CL		 612{
613 args->sa_slot = NULL;
614 args->sa_cache_this = cache_reply;
615 args->sa_privileged = 0;
616
617 res->sr_slot = NULL;
618}
619
620static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
621{
622 args->sa_privileged = 1;
623}
624
cb04ad2a
PT		 625int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
626 struct nfs4_sequence_args *args,
627 struct nfs4_sequence_res *res,
628 struct rpc_task *task)
3bd2384a 629{
3bd2384a
CL		 630 struct nfs4_slot *slot;
631
632 /* slot already allocated? */
633 if (res->sr_slot != NULL)
634 goto out_start;
635
636 spin_lock(&tbl->slot_tbl_lock);
637 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
638 goto out_sleep;
639
640 slot = nfs4_alloc_slot(tbl);
641 if (IS_ERR(slot)) {
642 if (slot == ERR_PTR(-ENOMEM))
643 task->tk_timeout = HZ >> 2;
644 goto out_sleep;
645 }
646 spin_unlock(&tbl->slot_tbl_lock);
647
0a014a44 648 slot->privileged = args->sa_privileged ? 1 : 0;
3bd2384a
CL		 649 args->sa_slot = slot;
650 res->sr_slot = slot;
651
652out_start:
653 rpc_call_start(task);
654 return 0;
655
656out_sleep:
657 if (args->sa_privileged)
658 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
659 NULL, RPC_PRIORITY_PRIVILEGED);
660 else
661 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
662 spin_unlock(&tbl->slot_tbl_lock);
663 return -EAGAIN;
664}
cb04ad2a 665EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
3bd2384a 666
2e80dbe7 667static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res)
3bd2384a
CL		 668{
669 struct nfs4_slot *slot = res->sr_slot;
670 struct nfs4_slot_table *tbl;
671
3bd2384a
CL		 672 tbl = slot->table;
673 spin_lock(&tbl->slot_tbl_lock);
674 if (!nfs41_wake_and_assign_slot(tbl, slot))
675 nfs4_free_slot(tbl, slot);
676 spin_unlock(&tbl->slot_tbl_lock);
677
678 res->sr_slot = NULL;
2e80dbe7
TM		 679}
680
681static int nfs40_sequence_done(struct rpc_task *task,
682 struct nfs4_sequence_res *res)
683{
684 if (res->sr_slot != NULL)
685 nfs40_sequence_free_slot(res);
3bd2384a
CL		 686 return 1;
687}
688
cccef3b9
AA		 689#if defined(CONFIG_NFS_V4_1)
690
d185a334 691static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 692{
e3725ec0 693 struct nfs4_session *session;
13615871 694 struct nfs4_slot_table *tbl;
a13ce7c6 695 struct nfs4_slot *slot = res->sr_slot;
c10e4498 696 bool send_new_highest_used_slotid = false;
13615871 697
a13ce7c6 698 tbl = slot->table;
e3725ec0 699 session = tbl->session;
ea028ac9 700
07e8dcbd
TM		 701 /* Bump the slot sequence number */
702 if (slot->seq_done)
703 slot->seq_nr++;
704 slot->seq_done = 0;
705
35dc1d74 706 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 707 /* Be nice to the server: try to ensure that the last transmitted
708 * value for highest_user_slotid <= target_highest_slotid
709 */
710 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
711 send_new_highest_used_slotid = true;
712
a13ce7c6 713 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 714 send_new_highest_used_slotid = false;
715 goto out_unlock;
716 }
a13ce7c6 717 nfs4_free_slot(tbl, slot);
c10e4498
TM		 718
719 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
720 send_new_highest_used_slotid = false;
b75ad4cd 721out_unlock:
35dc1d74 722 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 723 res->sr_slot = NULL;
c10e4498 724 if (send_new_highest_used_slotid)
3f10a6af 725 nfs41_notify_server(session->clp);
045d2a6d
TM		 726 if (waitqueue_active(&tbl->slot_waitq))
727 wake_up_all(&tbl->slot_waitq);
13615871
AA		 728}
729
2e80dbe7
TM		 730static int nfs41_sequence_process(struct rpc_task *task,
731 struct nfs4_sequence_res *res)
b0df806c 732{
e3725ec0 733 struct nfs4_session *session;
a13ce7c6 734 struct nfs4_slot *slot = res->sr_slot;
14516c3a 735 struct nfs_client *clp;
ac20d163 736 bool interrupted = false;
85563073 737 int ret = 1;
b0df806c 738
a13ce7c6
TM		 739 if (slot == NULL)
740 goto out_noaction;
468f8613
BS		 741 /* don't increment the sequence number if the task wasn't sent */
742 if (!RPC_WAS_SENT(task))
b0df806c
AA		 743 goto out;
744
e3725ec0 745 session = slot->table->session;
933602e3 746
ac20d163
TM		 747 if (slot->interrupted) {
748 slot->interrupted = 0;
749 interrupted = true;
750 }
751
2f92ae34 752 trace_nfs4_sequence_done(session, res);
691daf3b 753 /* Check the SEQUENCE operation status */
14516c3a
TM		 754 switch (res->sr_status) {
755 case 0:
a865880e
OK		 756 /* If previous op on slot was interrupted and we reused
757 * the seq# and got a reply from the cache, then retry
758 */
759 if (task->tk_status == -EREMOTEIO && interrupted) {
760 ++slot->seq_nr;
761 goto retry_nowait;
762 }
b0df806c 763 /* Update the slot's sequence and clientid lease timer */
07e8dcbd 764 slot->seq_done = 1;
e3725ec0 765 clp = session->clp;
8e63b6a8 766 do_renew_lease(clp, res->sr_timestamp);
0629e370 767 /* Check sequence flags */
0a014a44
TM		 768 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags,
769 !!slot->privileged);
464ee9f9 770 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 771 break;
ac20d163
TM		 772 case 1:
773 /*
774 * sr_status remains 1 if an RPC level error occurred.
775 * The server may or may not have processed the sequence
776 * operation..
777 * Mark the slot as having hosted an interrupted RPC call.
778 */
779 slot->interrupted = 1;
780 goto out;
14516c3a
TM		 781 case -NFS4ERR_DELAY:
782 /* The server detected a resend of the RPC call and
783 * returned NFS4ERR_DELAY as per Section 2.10.6.2
784 * of RFC5661.
785 */
df2fabff 786 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 787 __func__,
df2fabff 788 slot->slot_nr,
933602e3 789 slot->seq_nr);
14516c3a 790 goto out_retry;
85563073
TM		 791 case -NFS4ERR_BADSLOT:
792 /*
793 * The slot id we used was probably retired. Try again
794 * using a different slot id.
795 */
e8794440
TM		 796 goto retry_nowait;
797 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 798 /*
799 * Was the last operation on this sequence interrupted?
800 * If so, retry after bumping the sequence number.
801 */
802 if (interrupted) {
803 ++slot->seq_nr;
804 goto retry_nowait;
805 }
e8794440
TM		 806 /*
807 * Could this slot have been previously retired?
808 * If so, then the server may be expecting seq_nr = 1!
809 */
8e63b6a8
TM		 810 if (slot->seq_nr != 1) {
811 slot->seq_nr = 1;
812 goto retry_nowait;
813 }
814 break;
e8794440
TM		 815 case -NFS4ERR_SEQ_FALSE_RETRY:
816 ++slot->seq_nr;
817 goto retry_nowait;
2cf10cdd
TM		 818 case -NFS4ERR_DEADSESSION:
819 case -NFS4ERR_BADSESSION:
820 nfs4_schedule_session_recovery(session, res->sr_status);
821 goto retry_nowait;
14516c3a
TM		 822 default:
823 /* Just update the slot sequence no. */
07e8dcbd 824 slot->seq_done = 1;
b0df806c
AA		 825 }
826out:
827 /* The session may be reset by one of the error handlers. */
828 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
a13ce7c6 829out_noaction:
85563073 830 return ret;
e8794440
TM		 831retry_nowait:
832 if (rpc_restart_call_prepare(task)) {
2e80dbe7 833 nfs41_sequence_free_slot(res);
e8794440
TM		 834 task->tk_status = 0;
835 ret = 0;
836 }
837 goto out;
14516c3a 838out_retry:
d05dd4e9 839 if (!rpc_restart_call(task))
14516c3a
TM		 840 goto out;
841 rpc_delay(task, NFS4_POLL_RETRY_MAX);
842 return 0;
b0df806c 843}
2e80dbe7
TM		 844
845int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
846{
847 if (!nfs41_sequence_process(task, res))
848 return 0;
849 if (res->sr_slot != NULL)
850 nfs41_sequence_free_slot(res);
851 return 1;
852
853}
f9c96fcc 854EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 855
2e80dbe7
TM		 856static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
857{
858 if (res->sr_slot == NULL)
859 return 1;
860 if (res->sr_slot->table->session != NULL)
861 return nfs41_sequence_process(task, res);
862 return nfs40_sequence_done(task, res);
863}
864
865static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
866{
867 if (res->sr_slot != NULL) {
868 if (res->sr_slot->table->session != NULL)
869 nfs41_sequence_free_slot(res);
870 else
871 nfs40_sequence_free_slot(res);
872 }
873}
874
2c4b131d 875int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 876{
e3725ec0 877 if (res->sr_slot == NULL)
14516c3a 878 return 1;
3bd2384a
CL		 879 if (!res->sr_slot->table->session)
880 return nfs40_sequence_done(task, res);
14516c3a 881 return nfs41_sequence_done(task, res);
df896455 882}
2c4b131d 883EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 884
dc70d7b3 885int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 886 struct nfs4_sequence_args *args,
887 struct nfs4_sequence_res *res,
ce5039c1
AA		 888 struct rpc_task *task)
889{
fbcd4abc
AA		 890 struct nfs4_slot *slot;
891 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 892
893 dprintk("--> %s\n", __func__);
ce5039c1 894 /* slot already allocated? */
dfb4f309 895 if (res->sr_slot != NULL)
d9afbd1b 896 goto out_success;
ce5039c1 897
fbcd4abc
AA		 898 tbl = &session->fc_slot_table;
899
69d206b5
TM		 900 task->tk_timeout = 0;
901
fbcd4abc 902 spin_lock(&tbl->slot_tbl_lock);
774d5f14 903 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 904 !args->sa_privileged) {
0b1c8fc4 905 /* The state manager will wait until the slot table is empty */
0b1c8fc4 906 dprintk("%s session is draining\n", __func__);
7b939a3f 907 goto out_sleep;
689cf5c1
AB		 908 }
909
2dc03b7f 910 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 911 if (IS_ERR(slot)) {
912 /* If out of memory, try again in 1/4 second */
913 if (slot == ERR_PTR(-ENOMEM))
914 task->tk_timeout = HZ >> 2;
fbcd4abc 915 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 916 goto out_sleep;
fbcd4abc
AA		 917 }
918 spin_unlock(&tbl->slot_tbl_lock);
919
0a014a44 920 slot->privileged = args->sa_privileged ? 1 : 0;
2b2fa717 921 args->sa_slot = slot;
fbcd4abc 922
e8d92382 923 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 924 slot->slot_nr, slot->seq_nr);
fbcd4abc 925
dfb4f309 926 res->sr_slot = slot;
8e63b6a8 927 res->sr_timestamp = jiffies;
2a6e26cd 928 res->sr_status_flags = 0;
fbcd4abc
AA		 929 /*
930 * sr_status is only set in decode_sequence, and so will remain
931 * set to 1 if an rpc level failure occurs.
932 */
933 res->sr_status = 1;
2f92ae34 934 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 935out_success:
936 rpc_call_start(task);
ce5039c1 937 return 0;
7b939a3f 938out_sleep:
8fe72bac
TM		 939 /* Privileged tasks are queued with top priority */
940 if (args->sa_privileged)
1e1093c7
TM		 941 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
942 NULL, RPC_PRIORITY_PRIVILEGED);
943 else
944 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 945 spin_unlock(&tbl->slot_tbl_lock);
946 return -EAGAIN;
ce5039c1 947}
dc70d7b3 948EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 949
5a580e0a
CL		 950static int nfs4_setup_sequence(const struct nfs_server *server,
951 struct nfs4_sequence_args *args,
952 struct nfs4_sequence_res *res,
953 struct rpc_task *task)
ce5039c1 954{
035168ab 955 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 956 int ret = 0;
957
3bd2384a 958 if (!session)
cb04ad2a
PT		 959 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
960 args, res, task);
035168ab 961
e8d92382 962 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 963 __func__, session->clp, session, res->sr_slot ?
e8d92382 964 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 965
9d12b216 966 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 967
ce5039c1
AA		 968 dprintk("<-- %s status=%d\n", __func__, ret);
969 return ret;
970}
971
ce5039c1
AA		 972static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
973{
2a3eb2b9 974 struct nfs4_call_sync_data *data = calldata;
6ba7db34 975 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 976
035168ab
TM		 977 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
978
d9afbd1b 979 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 980}
981
69ab40c4
AA		 982static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
983{
2a3eb2b9 984 struct nfs4_call_sync_data *data = calldata;
69ab40c4 985
14516c3a 986 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 987}
988
17280175 989static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 990 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 991 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 992};
993
3bd2384a
CL		 994#else /* !CONFIG_NFS_V4_1 */
995
9915ea7e
CL		 996static int nfs4_setup_sequence(const struct nfs_server *server,
997 struct nfs4_sequence_args *args,
998 struct nfs4_sequence_res *res,
999 struct rpc_task *task)
1000{
cb04ad2a
PT		 1001 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
1002 args, res, task);
9915ea7e
CL		 1003}
1004
2e80dbe7
TM		 1005static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
1006{
1007 return nfs40_sequence_done(task, res);
1008}
1009
1010static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
1011{
1012 if (res->sr_slot != NULL)
1013 nfs40_sequence_free_slot(res);
1014}
1015
2c4b131d
PT		 1016int nfs4_sequence_done(struct rpc_task *task,
1017 struct nfs4_sequence_res *res)
9915ea7e 1018{
3bd2384a 1019 return nfs40_sequence_done(task, res);
9915ea7e 1020}
2c4b131d 1021EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 1022
1023#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 1024
1025static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
1026{
1027 struct nfs4_call_sync_data *data = calldata;
1028 nfs4_setup_sequence(data->seq_server,
1029 data->seq_args, data->seq_res, task);
1030}
1031
1032static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
1033{
1034 struct nfs4_call_sync_data *data = calldata;
1035 nfs4_sequence_done(task, data->seq_res);
1036}
1037
1038static const struct rpc_call_ops nfs40_call_sync_ops = {
1039 .rpc_call_prepare = nfs40_call_sync_prepare,
1040 .rpc_call_done = nfs40_call_sync_done,
1041};
1042
7c513058
BS		 1043static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
1044 struct nfs_server *server,
ce5039c1
AA		 1045 struct rpc_message *msg,
1046 struct nfs4_sequence_args *args,
8fe72bac 1047 struct nfs4_sequence_res *res)
ce5039c1
AA		 1048{
1049 int ret;
1050 struct rpc_task *task;
9915ea7e 1051 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 1052 struct nfs4_call_sync_data data = {
035168ab 1053 .seq_server = server,
ce5039c1
AA		 1054 .seq_args = args,
1055 .seq_res = res,
ce5039c1
AA		 1056 };
1057 struct rpc_task_setup task_setup = {
7c513058 1058 .rpc_client = clnt,
ce5039c1 1059 .rpc_message = msg,
9915ea7e 1060 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 1061 .callback_data = &data
1062 };
1063
ce5039c1
AA		 1064 task = rpc_run_task(&task_setup);
1065 if (IS_ERR(task))
1066 ret = PTR_ERR(task);
1067 else {
1068 ret = task->tk_status;
1069 rpc_put_task(task);
1070 }
1071 return ret;
1072}
1073
7c513058
BS		 1074int nfs4_call_sync(struct rpc_clnt *clnt,
1075 struct nfs_server *server,
e73b83f2
BS		 1076 struct rpc_message *msg,
1077 struct nfs4_sequence_args *args,
1078 struct nfs4_sequence_res *res,
1079 int cache_reply)
1080{
a9c92d6b 1081 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 1082 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 1083}
cccef3b9 1084
38478b24 1085static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 1086{
38478b24 1087 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 1088
38478b24 1089 spin_lock(&dir->i_lock);
359d7d1c 1090 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
e603a4c1
TM		 1091 if (cinfo->atomic && cinfo->before == dir->i_version) {
1092 nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE;
1093 nfsi->attrtimeo_timestamp = jiffies;
1094 } else {
bfc69a45 1095 nfs_force_lookup_revalidate(dir);
e603a4c1
TM		 1096 if (cinfo->before != dir->i_version)
1097 nfsi->cache_validity |= NFS_INO_INVALID_ACCESS |
1098 NFS_INO_INVALID_ACL;
1099 }
a9a4a87a 1100 dir->i_version = cinfo->after;
3235b403 1101 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
de242c0b 1102 nfs_fscache_invalidate(dir);
38478b24 1103 spin_unlock(&dir->i_lock);
1da177e4
LT		 1104}
1105
e56e0b78 1106struct nfs4_opendata {
c6d00e63 1107 struct kref kref;
e56e0b78
TM		 1108 struct nfs_openargs o_arg;
1109 struct nfs_openres o_res;
cdd4e68b
TM		 1110 struct nfs_open_confirmargs c_arg;
1111 struct nfs_open_confirmres c_res;
6926afd1
TM		 1112 struct nfs4_string owner_name;
1113 struct nfs4_string group_name;
a49c2691 1114 struct nfs4_label *a_label;
e56e0b78 1115 struct nfs_fattr f_attr;
1775fd3e 1116 struct nfs4_label *f_label;
e56e0b78 1117 struct dentry *dir;
82a2c1b7 1118 struct dentry *dentry;
e56e0b78 1119 struct nfs4_state_owner *owner;
aac00a8d 1120 struct nfs4_state *state;
e56e0b78 1121 struct iattr attrs;
26e976a8 1122 unsigned long timestamp;
3e309914 1123 unsigned int rpc_done : 1;
5bc2afc2 1124 unsigned int file_created : 1;
bdeca1b7 1125 unsigned int is_recover : 1;
24ac23ab
TM		 1126 int rpc_status;
1127 int cancelled;
e56e0b78
TM		 1128};
1129
49f9a0fa
TM		 1130static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1131 int err, struct nfs4_exception *exception)
1132{
1133 if (err != -EINVAL)
1134 return false;
1135 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1136 return false;
1137 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1138 exception->retry = 1;
1139 return true;
1140}
1141
6ae37339
TM		 1142static u32
1143nfs4_map_atomic_open_share(struct nfs_server *server,
1144 fmode_t fmode, int openflags)
1145{
1146 u32 res = 0;
1147
1148 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1149 case FMODE_READ:
1150 res = NFS4_SHARE_ACCESS_READ;
1151 break;
1152 case FMODE_WRITE:
1153 res = NFS4_SHARE_ACCESS_WRITE;
1154 break;
1155 case FMODE_READ|FMODE_WRITE:
1156 res = NFS4_SHARE_ACCESS_BOTH;
1157 }
1158 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1159 goto out;
1160 /* Want no delegation if we're using O_DIRECT */
1161 if (openflags & O_DIRECT)
1162 res |= NFS4_SHARE_WANT_NO_DELEG;
1163out:
1164 return res;
1165}
1166
49f9a0fa
TM		 1167static enum open_claim_type4
1168nfs4_map_atomic_open_claim(struct nfs_server *server,
1169 enum open_claim_type4 claim)
1170{
1171 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1172 return claim;
1173 switch (claim) {
1174 default:
1175 return claim;
1176 case NFS4_OPEN_CLAIM_FH:
1177 return NFS4_OPEN_CLAIM_NULL;
1178 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1179 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1180 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1181 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1182 }
1183}
2ced46c2
TM		 1184
1185static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1186{
1187 p->o_res.f_attr = &p->f_attr;
1775fd3e 1188 p->o_res.f_label = p->f_label;
c1d51931
TM		 1189 p->o_res.seqid = p->o_arg.seqid;
1190 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 1191 p->o_res.server = p->o_arg.server;
5f657530 1192 p->o_res.access_request = p->o_arg.access;
2ced46c2 1193 nfs_fattr_init(&p->f_attr);
6926afd1 1194 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 1195}
1196
82a2c1b7 1197static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 1198 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 1199 const struct iattr *attrs,
1775fd3e 1200 struct nfs4_label *label,
4a1c0893 1201 enum open_claim_type4 claim,
8535b2be 1202 gfp_t gfp_mask)
e56e0b78 1203{
82a2c1b7 1204 struct dentry *parent = dget_parent(dentry);
2b0143b5 1205 struct inode *dir = d_inode(parent);
e56e0b78 1206 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1207 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 1208 struct nfs4_opendata *p;
1209
8535b2be 1210 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1211 if (p == NULL)
1212 goto err;
14c43f76
DQ		 1213
1214 p->f_label = nfs4_label_alloc(server, gfp_mask);
1215 if (IS_ERR(p->f_label))
1216 goto err_free_p;
1217
a49c2691
KM		 1218 p->a_label = nfs4_label_alloc(server, gfp_mask);
1219 if (IS_ERR(p->a_label))
1220 goto err_free_f;
1221
63f5f796
TM		 1222 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1223 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1224 if (IS_ERR(p->o_arg.seqid))
14c43f76 1225 goto err_free_label;
82a2c1b7
AV		 1226 nfs_sb_active(dentry->d_sb);
1227 p->dentry = dget(dentry);
e56e0b78
TM		 1228 p->dir = parent;
1229 p->owner = sp;
1230 atomic_inc(&sp->so_count);
dc0b027d
TM		 1231 p->o_arg.open_flags = flags;
1232 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
dff25ddb 1233 p->o_arg.umask = current_umask();
536585cc 1234 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
6ae37339
TM		 1235 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1236 fmode, flags);
ae2bb032
WAA		 1237 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1238 * will return permission denied for all bits until close */
1239 if (!(flags & O_EXCL)) {
1240 /* ask server to check for all possible rights as results
1241 * are cached */
536585cc
TM		 1242 switch (p->o_arg.claim) {
1243 default:
1244 break;
1245 case NFS4_OPEN_CLAIM_NULL:
1246 case NFS4_OPEN_CLAIM_FH:
1247 p->o_arg.access = NFS4_ACCESS_READ |
1248 NFS4_ACCESS_MODIFY |
1249 NFS4_ACCESS_EXTEND |
1250 NFS4_ACCESS_EXECUTE;
1251 }
ae2bb032 1252 }
7539bbab 1253 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1254 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1255 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1256 p->o_arg.name = &dentry->d_name;
e56e0b78 1257 p->o_arg.server = server;
aa9c2669 1258 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1259 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
a49c2691 1260 p->o_arg.label = nfs4_label_copy(p->a_label, label);
49f9a0fa 1261 switch (p->o_arg.claim) {
4a1c0893
TM		 1262 case NFS4_OPEN_CLAIM_NULL:
1263 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1264 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1265 p->o_arg.fh = NFS_FH(dir);
1266 break;
1267 case NFS4_OPEN_CLAIM_PREVIOUS:
1268 case NFS4_OPEN_CLAIM_FH:
1269 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1270 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1271 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1272 }
536e43d1 1273 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1274 __u32 verf[2];
d77d76ff 1275
e56e0b78
TM		 1276 p->o_arg.u.attrs = &p->attrs;
1277 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1278
1279 verf[0] = jiffies;
1280 verf[1] = current->pid;
1281 memcpy(p->o_arg.u.verifier.data, verf,
1282 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1283 }
cdd4e68b
TM		 1284 p->c_arg.fh = &p->o_res.fh;
1285 p->c_arg.stateid = &p->o_res.stateid;
1286 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1287 nfs4_init_opendata_res(p);
c6d00e63 1288 kref_init(&p->kref);
e56e0b78 1289 return p;
14c43f76
DQ		 1290
1291err_free_label:
a49c2691
KM		 1292 nfs4_label_free(p->a_label);
1293err_free_f:
14c43f76
DQ		 1294 nfs4_label_free(p->f_label);
1295err_free_p:
e56e0b78
TM		 1296 kfree(p);
1297err:
1298 dput(parent);
1299 return NULL;
1300}
1301
c6d00e63 1302static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1303{
c6d00e63
TM		 1304 struct nfs4_opendata *p = container_of(kref,
1305 struct nfs4_opendata, kref);
82a2c1b7 1306 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1307
1308 nfs_free_seqid(p->o_arg.seqid);
2e80dbe7 1309 nfs4_sequence_free_slot(&p->o_res.seq_res);
aac00a8d
TM		 1310 if (p->state != NULL)
1311 nfs4_put_open_state(p->state);
c6d00e63 1312 nfs4_put_state_owner(p->owner);
14c43f76 1313
a49c2691 1314 nfs4_label_free(p->a_label);
14c43f76
DQ		 1315 nfs4_label_free(p->f_label);
1316
c6d00e63 1317 dput(p->dir);
82a2c1b7
AV		 1318 dput(p->dentry);
1319 nfs_sb_deactive(sb);
6926afd1 1320 nfs_fattr_free_names(&p->f_attr);
e911b815 1321 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1322 kfree(p);
1323}
1324
1325static void nfs4_opendata_put(struct nfs4_opendata *p)
1326{
1327 if (p != NULL)
1328 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1329}
1330
06f814a3
TM		 1331static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1332{
06f814a3
TM		 1333 int ret;
1334
06f814a3 1335 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1336 return ret;
1337}
1338
24311f88
TM		 1339static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1340 fmode_t fmode)
1341{
1342 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1343 case FMODE_READ|FMODE_WRITE:
1344 return state->n_rdwr != 0;
1345 case FMODE_WRITE:
1346 return state->n_wronly != 0;
1347 case FMODE_READ:
1348 return state->n_rdonly != 0;
1349 }
1350 WARN_ON_ONCE(1);
1351 return false;
1352}
1353
dc0b027d 1354static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1355{
1356 int ret = 0;
dc0b027d 1357
536e43d1 1358 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1359 goto out;
1360 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1361 case FMODE_READ:
88069f77
TM		 1362 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1363 && state->n_rdonly != 0;
6ee41268
TM		 1364 break;
1365 case FMODE_WRITE:
88069f77
TM		 1366 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1367 && state->n_wronly != 0;
6ee41268
TM		 1368 break;
1369 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1370 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1371 && state->n_rdwr != 0;
6ee41268 1372 }
dc0b027d 1373out:
6ee41268
TM		 1374 return ret;
1375}
1376
2a606188
TM		 1377static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1378 enum open_claim_type4 claim)
aac00a8d 1379{
652f89f6
TM		 1380 if (delegation == NULL)
1381 return 0;
dc0b027d 1382 if ((delegation->type & fmode) != fmode)
aac00a8d 1383 return 0;
d25be546
TM		 1384 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1385 return 0;
2a606188
TM		 1386 switch (claim) {
1387 case NFS4_OPEN_CLAIM_NULL:
1388 case NFS4_OPEN_CLAIM_FH:
1389 break;
1390 case NFS4_OPEN_CLAIM_PREVIOUS:
1391 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1392 break;
1393 default:
1394 return 0;
1395 }
b7391f44 1396 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1397 return 1;
1398}
1399
dc0b027d 1400static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1401{
dc0b027d 1402 switch (fmode) {
e7616923
TM		 1403 case FMODE_WRITE:
1404 state->n_wronly++;
1405 break;
1406 case FMODE_READ:
1407 state->n_rdonly++;
1408 break;
1409 case FMODE_READ|FMODE_WRITE:
1410 state->n_rdwr++;
1411 }
dc0b027d 1412 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1413}
1414
8a64c4ef
TM		 1415#ifdef CONFIG_NFS_V4_1
1416static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state)
1417{
1418 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags))
1419 return true;
1420 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags))
1421 return true;
1422 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags))
1423 return true;
1424 return false;
1425}
1426#endif /* CONFIG_NFS_V4_1 */
1427
4f14c194
TM		 1428static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1429{
1430 struct nfs_client *clp = state->owner->so_server->nfs_client;
1431 bool need_recover = false;
1432
1433 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1434 need_recover = true;
1435 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1436 need_recover = true;
1437 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1438 need_recover = true;
1439 if (need_recover)
1440 nfs4_state_mark_reclaim_nograce(clp, state);
1441}
1442
e999e80e 1443static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1393d961 1444 const nfs4_stateid *stateid, nfs4_stateid *freeme)
e999e80e
TM		 1445{
1446 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1447 return true;
4f14c194 1448 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1393d961 1449 nfs4_stateid_copy(freeme, &state->open_stateid);
4f14c194 1450 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1451 return true;
4f14c194 1452 }
e999e80e
TM		 1453 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1454 return true;
1455 return false;
1456}
1457
f95549cf
TM		 1458static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1459{
3c38cbe2
TM		 1460 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1461 return;
f95549cf
TM		 1462 if (state->n_wronly)
1463 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1464 if (state->n_rdonly)
1465 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1466 if (state->n_rdwr)
1467 set_bit(NFS_O_RDWR_STATE, &state->flags);
3c38cbe2 1468 set_bit(NFS_OPEN_STATE, &state->flags);
f95549cf
TM		 1469}
1470
226056c5
TM		 1471static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1472 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1473{
226056c5
TM		 1474 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1475 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1476 case FMODE_WRITE:
1477 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1478 break;
1479 case FMODE_READ:
1480 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1481 break;
1482 case 0:
1483 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1484 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1485 clear_bit(NFS_OPEN_STATE, &state->flags);
1486 }
1487 if (stateid == NULL)
1488 return;
3e7dfb16
TM		 1489 /* Handle OPEN+OPEN_DOWNGRADE races */
1490 if (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1491 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
f95549cf 1492 nfs_resync_open_stateid_locked(state);
226056c5 1493 return;
f95549cf 1494 }
003707c7 1495 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1496 nfs4_stateid_copy(&state->stateid, stateid);
1497 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1498}
1499
4a1e2feb
TM		 1500static void nfs_clear_open_stateid(struct nfs4_state *state,
1501 nfs4_stateid *arg_stateid,
1502 nfs4_stateid *stateid, fmode_t fmode)
226056c5
TM		 1503{
1504 write_seqlock(&state->seqlock);
3e7dfb16
TM		 1505 /* Ignore, if the CLOSE argment doesn't match the current stateid */
1506 if (nfs4_state_match_open_stateid_other(state, arg_stateid))
1507 nfs_clear_open_stateid_locked(state, stateid, fmode);
226056c5 1508 write_sequnlock(&state->seqlock);
4f14c194
TM		 1509 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1510 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1511}
1512
1393d961
TM		 1513static void nfs_set_open_stateid_locked(struct nfs4_state *state,
1514 const nfs4_stateid *stateid, fmode_t fmode,
1515 nfs4_stateid *freeme)
003707c7 1516{
dc0b027d 1517 switch (fmode) {
003707c7
TM		 1518 case FMODE_READ:
1519 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1520 break;
1521 case FMODE_WRITE:
1522 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1523 break;
1524 case FMODE_READ|FMODE_WRITE:
1525 set_bit(NFS_O_RDWR_STATE, &state->flags);
1526 }
1393d961 1527 if (!nfs_need_update_open_stateid(state, stateid, freeme))
e999e80e
TM		 1528 return;
1529 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1530 nfs4_stateid_copy(&state->stateid, stateid);
1531 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1532}
1533
1393d961
TM		 1534static void __update_open_stateid(struct nfs4_state *state,
1535 const nfs4_stateid *open_stateid,
1536 const nfs4_stateid *deleg_stateid,
1537 fmode_t fmode,
1538 nfs4_stateid *freeme)
1da177e4 1539{
8bda4e4c
TM		 1540 /*
1541 * Protect the call to nfs4_state_set_mode_locked and
1542 * serialise the stateid update
1543 */
361cad3c 1544 spin_lock(&state->owner->so_lock);
8bda4e4c 1545 write_seqlock(&state->seqlock);
003707c7 1546 if (deleg_stateid != NULL) {
f597c537 1547 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1548 set_bit(NFS_DELEGATED_STATE, &state->flags);
1549 }
1550 if (open_stateid != NULL)
1393d961 1551 nfs_set_open_stateid_locked(state, open_stateid, fmode, freeme);
8bda4e4c 1552 write_sequnlock(&state->seqlock);
dc0b027d 1553 update_open_stateflags(state, fmode);
ec073428 1554 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1555}
1556
1393d961
TM		 1557static int update_open_stateid(struct nfs4_state *state,
1558 const nfs4_stateid *open_stateid,
1559 const nfs4_stateid *delegation,
1560 fmode_t fmode)
34310430 1561{
1393d961
TM		 1562 struct nfs_server *server = NFS_SERVER(state->inode);
1563 struct nfs_client *clp = server->nfs_client;
34310430
TM		 1564 struct nfs_inode *nfsi = NFS_I(state->inode);
1565 struct nfs_delegation *deleg_cur;
83aa3e0f 1566 nfs4_stateid freeme = { };
34310430
TM		 1567 int ret = 0;
1568
dc0b027d 1569 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1570
1571 rcu_read_lock();
1572 deleg_cur = rcu_dereference(nfsi->delegation);
1573 if (deleg_cur == NULL)
1574 goto no_delegation;
1575
1576 spin_lock(&deleg_cur->lock);
17f26b12 1577 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1578 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1579 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1580 goto no_delegation_unlock;
1581
1582 if (delegation == NULL)
1583 delegation = &deleg_cur->stateid;
f597c537 1584 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1585 goto no_delegation_unlock;
1586
b7391f44 1587 nfs_mark_delegation_referenced(deleg_cur);
1393d961
TM		 1588 __update_open_stateid(state, open_stateid, &deleg_cur->stateid,
1589 fmode, &freeme);
34310430
TM		 1590 ret = 1;
1591no_delegation_unlock:
1592 spin_unlock(&deleg_cur->lock);
1593no_delegation:
1594 rcu_read_unlock();
1595
1596 if (!ret && open_stateid != NULL) {
1393d961 1597 __update_open_stateid(state, open_stateid, NULL, fmode, &freeme);
34310430
TM		 1598 ret = 1;
1599 }
4f14c194 1600 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1393d961
TM		 1601 nfs4_schedule_state_manager(clp);
1602 if (freeme.type != 0)
1603 nfs4_test_and_free_stateid(server, &freeme,
1604 state->owner->so_cred);
34310430
TM		 1605
1606 return ret;
1607}
1608
39071e6f
TM		 1609static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1610 const nfs4_stateid *stateid)
1611{
1612 struct nfs4_state *state = lsp->ls_state;
1613 bool ret = false;
1614
1615 spin_lock(&state->state_lock);
1616 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1617 goto out_noupdate;
1618 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1619 goto out_noupdate;
1620 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1621 ret = true;
1622out_noupdate:
1623 spin_unlock(&state->state_lock);
1624 return ret;
1625}
34310430 1626
dc0b027d 1627static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1628{
1629 struct nfs_delegation *delegation;
1630
1631 rcu_read_lock();
1632 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1633 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1634 rcu_read_unlock();
1635 return;
1636 }
1637 rcu_read_unlock();
57ec14c5 1638 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1639}
1640
6ee41268 1641static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1642{
1643 struct nfs4_state *state = opendata->state;
1644 struct nfs_inode *nfsi = NFS_I(state->inode);
1645 struct nfs_delegation *delegation;
f448badd 1646 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1647 fmode_t fmode = opendata->o_arg.fmode;
2a606188 1648 enum open_claim_type4 claim = opendata->o_arg.claim;
aac00a8d
TM		 1649 nfs4_stateid stateid;
1650 int ret = -EAGAIN;
1651
aac00a8d 1652 for (;;) {
61beef75 1653 spin_lock(&state->owner->so_lock);
dc0b027d 1654 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1655 update_open_stateflags(state, fmode);
6ee41268 1656 spin_unlock(&state->owner->so_lock);
61beef75 1657 goto out_return_state;
6ee41268 1658 }
61beef75 1659 spin_unlock(&state->owner->so_lock);
34310430
TM		 1660 rcu_read_lock();
1661 delegation = rcu_dereference(nfsi->delegation);
2a606188 1662 if (!can_open_delegated(delegation, fmode, claim)) {
34310430 1663 rcu_read_unlock();
aac00a8d 1664 break;
34310430 1665 }
aac00a8d 1666 /* Save the delegation */
f597c537 1667 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1668 rcu_read_unlock();
fa332941 1669 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1670 if (!opendata->is_recover) {
1671 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1672 if (ret != 0)
1673 goto out;
1674 }
aac00a8d 1675 ret = -EAGAIN;
34310430
TM		 1676
1677 /* Try to update the stateid using the delegation */
dc0b027d 1678 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1679 goto out_return_state;
aac00a8d 1680 }
aac00a8d
TM		 1681out:
1682 return ERR_PTR(ret);
1683out_return_state:
1684 atomic_inc(&state->count);
1685 return state;
1686}
1687
e23008ec
AA		 1688static void
1689nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1690{
1691 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1692 struct nfs_delegation *delegation;
1693 int delegation_flags = 0;
1694
1695 rcu_read_lock();
1696 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1697 if (delegation)
1698 delegation_flags = delegation->flags;
1699 rcu_read_unlock();
72d79ff8
TM		 1700 switch (data->o_arg.claim) {
1701 default:
1702 break;
1703 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1704 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
e23008ec
AA		 1705 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1706 "returning a delegation for "
1707 "OPEN(CLAIM_DELEGATE_CUR)\n",
1708 clp->cl_hostname);
72d79ff8
TM		 1709 return;
1710 }
1711 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
e23008ec
AA		 1712 nfs_inode_set_delegation(state->inode,
1713 data->owner->so_cred,
1714 &data->o_res);
1715 else
1716 nfs_inode_reclaim_delegation(state->inode,
1717 data->owner->so_cred,
1718 &data->o_res);
1719}
1720
1721/*
1722 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1723 * and update the nfs4_state.
1724 */
1725static struct nfs4_state *
1726_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1727{
1728 struct inode *inode = data->state->inode;
1729 struct nfs4_state *state = data->state;
1730 int ret;
1731
d2bfda2e
WAA		 1732 if (!data->rpc_done) {
1733 if (data->rpc_status) {
1734 ret = data->rpc_status;
1735 goto err;
1736 }
1737 /* cached opens have already been processed */
1738 goto update;
e23008ec
AA		 1739 }
1740
e23008ec
AA		 1741 ret = nfs_refresh_inode(inode, &data->f_attr);
1742 if (ret)
1743 goto err;
1744
1745 if (data->o_res.delegation_type != 0)
1746 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1747update:
e23008ec
AA		 1748 update_open_stateid(state, &data->o_res.stateid, NULL,
1749 data->o_arg.fmode);
d49f042a 1750 atomic_inc(&state->count);
e23008ec
AA		 1751
1752 return state;
1753err:
1754 return ERR_PTR(ret);
1755
1756}
1757
1758static struct nfs4_state *
1759_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1760{
1761 struct inode *inode;
1762 struct nfs4_state *state = NULL;
1b370bc2 1763 int ret;
24ac23ab 1764
aac00a8d 1765 if (!data->rpc_done) {
6ee41268 1766 state = nfs4_try_open_cached(data);
9759b0fb 1767 trace_nfs4_cached_open(data->state);
aac00a8d
TM		 1768 goto out;
1769 }
1770
1b370bc2 1771 ret = -EAGAIN;
24ac23ab 1772 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1773 goto err;
1775fd3e 1774 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1775 ret = PTR_ERR(inode);
03f28e3a 1776 if (IS_ERR(inode))
1b370bc2
TM		 1777 goto err;
1778 ret = -ENOMEM;
24ac23ab
TM		 1779 state = nfs4_get_open_state(inode, data->owner);
1780 if (state == NULL)
1b370bc2 1781 goto err_put_inode;
e23008ec
AA		 1782 if (data->o_res.delegation_type != 0)
1783 nfs4_opendata_check_deleg(data, state);
34310430 1784 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1785 data->o_arg.fmode);
24ac23ab 1786 iput(inode);
aac00a8d 1787out:
7aa262b5 1788 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1789 return state;
1b370bc2
TM		 1790err_put_inode:
1791 iput(inode);
1792err:
1793 return ERR_PTR(ret);
24ac23ab
TM		 1794}
1795
e23008ec
AA		 1796static struct nfs4_state *
1797nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1798{
2e80dbe7
TM		 1799 struct nfs4_state *ret;
1800
e23008ec 1801 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
2e80dbe7
TM		 1802 ret =_nfs4_opendata_reclaim_to_nfs4_state(data);
1803 else
1804 ret = _nfs4_opendata_to_nfs4_state(data);
1805 nfs4_sequence_free_slot(&data->o_res.seq_res);
1806 return ret;
e23008ec
AA		 1807}
1808
864472e9
TM		 1809static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1810{
1811 struct nfs_inode *nfsi = NFS_I(state->inode);
1812 struct nfs_open_context *ctx;
1813
1814 spin_lock(&state->inode->i_lock);
1815 list_for_each_entry(ctx, &nfsi->open_files, list) {
1816 if (ctx->state != state)
1817 continue;
1818 get_nfs_open_context(ctx);
1819 spin_unlock(&state->inode->i_lock);
1820 return ctx;
1821 }
1822 spin_unlock(&state->inode->i_lock);
1823 return ERR_PTR(-ENOENT);
1824}
1825
4a1c0893
TM		 1826static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1827 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1828{
1829 struct nfs4_opendata *opendata;
1830
4a1c0893 1831 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1832 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1833 if (opendata == NULL)
1834 return ERR_PTR(-ENOMEM);
1835 opendata->state = state;
1836 atomic_inc(&state->count);
1837 return opendata;
1838}
1839
24311f88
TM		 1840static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1841 fmode_t fmode)
864472e9 1842{
2ced46c2 1843 struct nfs4_state *newstate;
864472e9
TM		 1844 int ret;
1845
24311f88 1846 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
39f897fd 1847 return 0;
dc0b027d
TM		 1848 opendata->o_arg.open_flags = 0;
1849 opendata->o_arg.fmode = fmode;
be36e185
TM		 1850 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1851 NFS_SB(opendata->dentry->d_sb),
1852 fmode, 0);
2ced46c2
TM		 1853 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1854 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1855 nfs4_init_opendata_res(opendata);
b257957e 1856 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1857 if (ret != 0)
1858 return ret;
2ced46c2 1859 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1860 if (IS_ERR(newstate))
1861 return PTR_ERR(newstate);
24311f88
TM		 1862 if (newstate != opendata->state)
1863 ret = -ESTALE;
643168c2 1864 nfs4_close_state(newstate, fmode);
24311f88 1865 return ret;
864472e9
TM		 1866}
1867
1868static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1869{
864472e9
TM		 1870 int ret;
1871
4f14c194
TM		 1872 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1873 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1874 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1875 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1876 /* memory barrier prior to reading state->n_* */
2ced46c2 1877 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1878 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9 1879 smp_rmb();
24311f88
TM		 1880 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1881 if (ret != 0)
1882 return ret;
1883 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1884 if (ret != 0)
1885 return ret;
1886 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1887 if (ret != 0)
1888 return ret;
1ac7e2fd
TM		 1889 /*
1890 * We may have performed cached opens for all three recoveries.
1891 * Check if we need to update the current stateid.
1892 */
1893 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1894 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1895 write_seqlock(&state->seqlock);
1ac7e2fd 1896 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1897 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1898 write_sequnlock(&state->seqlock);
1ac7e2fd 1899 }
864472e9
TM		 1900 return 0;
1901}
1902
1da177e4
LT		 1903/*
1904 * OPEN_RECLAIM:
1905 * reclaim state on the server after a reboot.
1da177e4 1906 */
539cd03a 1907static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1908{
1ac7e2fd 1909 struct nfs_delegation *delegation;
864472e9 1910 struct nfs4_opendata *opendata;
dc0b027d 1911 fmode_t delegation_type = 0;
1da177e4
LT		 1912 int status;
1913
4a1c0893
TM		 1914 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1915 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1916 if (IS_ERR(opendata))
1917 return PTR_ERR(opendata);
1ac7e2fd
TM		 1918 rcu_read_lock();
1919 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1920 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1921 delegation_type = delegation->type;
1ac7e2fd 1922 rcu_read_unlock();
864472e9
TM		 1923 opendata->o_arg.u.delegation_type = delegation_type;
1924 status = nfs4_open_recover(opendata, state);
c6d00e63 1925 nfs4_opendata_put(opendata);
1da177e4
LT		 1926 return status;
1927}
1928
539cd03a 1929static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1930{
1931 struct nfs_server *server = NFS_SERVER(state->inode);
1932 struct nfs4_exception exception = { };
1933 int err;
1934 do {
539cd03a 1935 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1936 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1937 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1938 continue;
168667c4 1939 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1940 break;
1941 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1942 } while (exception.retry);
1943 return err;
1944}
1945
864472e9
TM		 1946static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1947{
1948 struct nfs_open_context *ctx;
1949 int ret;
1950
1951 ctx = nfs4_state_find_open_context(state);
1952 if (IS_ERR(ctx))
91876b13 1953 return -EAGAIN;
539cd03a 1954 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1955 put_nfs_open_context(ctx);
1956 return ret;
1957}
1958
db4f2e63 1959static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1960{
be76b5b6
TM		 1961 switch (err) {
1962 default:
1963 printk(KERN_ERR "NFS: %s: unhandled error "
1964 "%d.\n", __func__, err);
1965 case 0:
1966 case -ENOENT:
8eee52af 1967 case -EAGAIN:
be76b5b6
TM		 1968 case -ESTALE:
1969 break;
1970 case -NFS4ERR_BADSESSION:
1971 case -NFS4ERR_BADSLOT:
1972 case -NFS4ERR_BAD_HIGH_SLOT:
1973 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1974 case -NFS4ERR_DEADSESSION:
1975 set_bit(NFS_DELEGATED_STATE, &state->flags);
1976 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1977 return -EAGAIN;
1978 case -NFS4ERR_STALE_CLIENTID:
1979 case -NFS4ERR_STALE_STATEID:
1980 set_bit(NFS_DELEGATED_STATE, &state->flags);
be76b5b6
TM		 1981 /* Don't recall a delegation if it was lost */
1982 nfs4_schedule_lease_recovery(server->nfs_client);
1983 return -EAGAIN;
352297b9
CL		 1984 case -NFS4ERR_MOVED:
1985 nfs4_schedule_migration_recovery(server);
1986 return -EAGAIN;
8ef2f8d4
CL		 1987 case -NFS4ERR_LEASE_MOVED:
1988 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1989 return -EAGAIN;
be76b5b6
TM		 1990 case -NFS4ERR_DELEG_REVOKED:
1991 case -NFS4ERR_ADMIN_REVOKED:
404ea356 1992 case -NFS4ERR_EXPIRED:
be76b5b6 1993 case -NFS4ERR_BAD_STATEID:
db4f2e63 1994 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1995 nfs_inode_find_state_and_recover(state->inode,
1996 stateid);
1997 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1998 return -EAGAIN;
be76b5b6
TM		 1999 case -NFS4ERR_DELAY:
2000 case -NFS4ERR_GRACE:
2001 set_bit(NFS_DELEGATED_STATE, &state->flags);
2002 ssleep(1);
2003 return -EAGAIN;
db4f2e63
TM		 2004 case -ENOMEM:
2005 case -NFS4ERR_DENIED:
2006 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
2007 return 0;
be76b5b6 2008 }
1da177e4
LT		 2009 return err;
2010}
2011
24311f88
TM		 2012int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
2013 struct nfs4_state *state, const nfs4_stateid *stateid,
2014 fmode_t type)
db4f2e63
TM		 2015{
2016 struct nfs_server *server = NFS_SERVER(state->inode);
2017 struct nfs4_opendata *opendata;
24311f88 2018 int err = 0;
db4f2e63
TM		 2019
2020 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2021 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
2022 if (IS_ERR(opendata))
2023 return PTR_ERR(opendata);
2024 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
5e99b532
JL		 2025 write_seqlock(&state->seqlock);
2026 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2027 write_sequnlock(&state->seqlock);
24311f88
TM		 2028 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2029 switch (type & (FMODE_READ|FMODE_WRITE)) {
2030 case FMODE_READ|FMODE_WRITE:
2031 case FMODE_WRITE:
2032 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
2033 if (err)
2034 break;
2035 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
2036 if (err)
2037 break;
2038 case FMODE_READ:
2039 err = nfs4_open_recover_helper(opendata, FMODE_READ);
2040 }
db4f2e63
TM		 2041 nfs4_opendata_put(opendata);
2042 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
2043}
2044
be05c860
CL		 2045static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
2046{
2047 struct nfs4_opendata *data = calldata;
2048
cb04ad2a
PT		 2049 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
2050 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 2051}
2052
cdd4e68b
TM		 2053static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
2054{
2055 struct nfs4_opendata *data = calldata;
2056
17ead6c8 2057 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 2058
cdd4e68b 2059 data->rpc_status = task->tk_status;
26e976a8 2060 if (data->rpc_status == 0) {
f597c537 2061 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 2062 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 2063 renew_lease(data->o_res.server, data->timestamp);
3e309914 2064 data->rpc_done = 1;
26e976a8 2065 }
cdd4e68b
TM		 2066}
2067
2068static void nfs4_open_confirm_release(void *calldata)
2069{
2070 struct nfs4_opendata *data = calldata;
2071 struct nfs4_state *state = NULL;
2072
2073 /* If this request hasn't been cancelled, do nothing */
2074 if (data->cancelled == 0)
2075 goto out_free;
2076 /* In case of error, no cleanup! */
3e309914 2077 if (!data->rpc_done)
cdd4e68b 2078 goto out_free;
cdd4e68b 2079 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2080 if (!IS_ERR(state))
643168c2 2081 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 2082out_free:
c6d00e63 2083 nfs4_opendata_put(data);
cdd4e68b
TM		 2084}
2085
2086static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 2087 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 2088 .rpc_call_done = nfs4_open_confirm_done,
2089 .rpc_release = nfs4_open_confirm_release,
2090};
2091
2092/*
2093 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
2094 */
2095static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
2096{
2b0143b5 2097 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 2098 struct rpc_task *task;
5138fde0
TM		 2099 struct rpc_message msg = {
2100 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
2101 .rpc_argp = &data->c_arg,
2102 .rpc_resp = &data->c_res,
2103 .rpc_cred = data->owner->so_cred,
2104 };
c970aa85
TM		 2105 struct rpc_task_setup task_setup_data = {
2106 .rpc_client = server->client,
5138fde0 2107 .rpc_message = &msg,
c970aa85
TM		 2108 .callback_ops = &nfs4_open_confirm_ops,
2109 .callback_data = data,
101070ca 2110 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2111 .flags = RPC_TASK_ASYNC,
2112 };
1da177e4
LT		 2113 int status;
2114
17ead6c8 2115 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 2116 kref_get(&data->kref);
3e309914
TM		 2117 data->rpc_done = 0;
2118 data->rpc_status = 0;
5138fde0 2119 data->timestamp = jiffies;
e92c1e0d
BC		 2120 if (data->is_recover)
2121 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
c970aa85 2122 task = rpc_run_task(&task_setup_data);
7a1218a2 2123 if (IS_ERR(task))
cdd4e68b 2124 return PTR_ERR(task);
cdd4e68b
TM		 2125 status = nfs4_wait_for_completion_rpc_task(task);
2126 if (status != 0) {
2127 data->cancelled = 1;
2128 smp_wmb();
2129 } else
2130 status = data->rpc_status;
e6b3c4db 2131 rpc_put_task(task);
1da177e4
LT		 2132 return status;
2133}
2134
24ac23ab 2135static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 2136{
24ac23ab
TM		 2137 struct nfs4_opendata *data = calldata;
2138 struct nfs4_state_owner *sp = data->owner;
549b19cc 2139 struct nfs_client *clp = sp->so_server->nfs_client;
2a606188 2140 enum open_claim_type4 claim = data->o_arg.claim;
5138fde0 2141
24ac23ab 2142 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 2143 goto out_wait;
aac00a8d
TM		 2144 /*
2145 * Check if we still need to send an OPEN call, or if we can use
2146 * a delegation instead.
2147 */
2148 if (data->state != NULL) {
2149 struct nfs_delegation *delegation;
2150
dc0b027d 2151 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 2152 goto out_no_action;
aac00a8d
TM		 2153 rcu_read_lock();
2154 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2a606188 2155 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
652f89f6 2156 goto unlock_no_action;
aac00a8d
TM		 2157 rcu_read_unlock();
2158 }
95b72eb0 2159 /* Update client id. */
549b19cc 2160 data->o_arg.clientid = clp->cl_clientid;
2a606188
TM		 2161 switch (claim) {
2162 default:
2163 break;
8188df17
TM		 2164 case NFS4_OPEN_CLAIM_PREVIOUS:
2165 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2166 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 2167 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 2168 case NFS4_OPEN_CLAIM_FH:
2169 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 2170 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
2171 }
26e976a8 2172 data->timestamp = jiffies;
035168ab 2173 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 2174 &data->o_arg.seq_args,
2240a9e2
TM		 2175 &data->o_res.seq_res,
2176 task) != 0)
2177 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 2178
2179 /* Set the create mode (note dependency on the session type) */
2180 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2181 if (data->o_arg.open_flags & O_EXCL) {
2182 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2183 if (nfs4_has_persistent_session(clp))
2184 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2185 else if (clp->cl_mvops->minor_version > 0)
2186 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2187 }
6ee41268 2188 return;
652f89f6 2189unlock_no_action:
9759b0fb 2190 trace_nfs4_cached_open(data->state);
652f89f6 2191 rcu_read_unlock();
6ee41268
TM		 2192out_no_action:
2193 task->tk_action = NULL;
c8da19b9 2194out_wait:
b75ad4cd 2195 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 2196}
2197
24ac23ab
TM		 2198static void nfs4_open_done(struct rpc_task *task, void *calldata)
2199{
2200 struct nfs4_opendata *data = calldata;
1da177e4 2201
24ac23ab 2202 data->rpc_status = task->tk_status;
d898528c 2203
2e80dbe7 2204 if (!nfs4_sequence_process(task, &data->o_res.seq_res))
14516c3a 2205 return;
d898528c 2206
24ac23ab 2207 if (task->tk_status == 0) {
807d66d8
TM		 2208 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2209 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 2210 case S_IFREG:
2211 break;
2212 case S_IFLNK:
24ac23ab 2213 data->rpc_status = -ELOOP;
6f926b5b
TM		 2214 break;
2215 case S_IFDIR:
24ac23ab 2216 data->rpc_status = -EISDIR;
6f926b5b
TM		 2217 break;
2218 default:
24ac23ab 2219 data->rpc_status = -ENOTDIR;
807d66d8 2220 }
6f926b5b 2221 }
26e976a8 2222 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 2223 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2224 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 2225 }
3e309914 2226 data->rpc_done = 1;
24ac23ab 2227}
6f926b5b 2228
24ac23ab
TM		 2229static void nfs4_open_release(void *calldata)
2230{
2231 struct nfs4_opendata *data = calldata;
2232 struct nfs4_state *state = NULL;
2233
2234 /* If this request hasn't been cancelled, do nothing */
2235 if (data->cancelled == 0)
2236 goto out_free;
2237 /* In case of error, no cleanup! */
3e309914 2238 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 2239 goto out_free;
2240 /* In case we need an open_confirm, no cleanup! */
2241 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2242 goto out_free;
24ac23ab 2243 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2244 if (!IS_ERR(state))
643168c2 2245 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 2246out_free:
c6d00e63 2247 nfs4_opendata_put(data);
24ac23ab
TM		 2248}
2249
2250static const struct rpc_call_ops nfs4_open_ops = {
2251 .rpc_call_prepare = nfs4_open_prepare,
2252 .rpc_call_done = nfs4_open_done,
2253 .rpc_release = nfs4_open_release,
2254};
2255
b257957e 2256static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab 2257{
2b0143b5 2258 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 2259 struct nfs_server *server = NFS_SERVER(dir);
2260 struct nfs_openargs *o_arg = &data->o_arg;
2261 struct nfs_openres *o_res = &data->o_res;
2262 struct rpc_task *task;
5138fde0
TM		 2263 struct rpc_message msg = {
2264 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2265 .rpc_argp = o_arg,
2266 .rpc_resp = o_res,
2267 .rpc_cred = data->owner->so_cred,
2268 };
c970aa85
TM		 2269 struct rpc_task_setup task_setup_data = {
2270 .rpc_client = server->client,
5138fde0 2271 .rpc_message = &msg,
c970aa85
TM		 2272 .callback_ops = &nfs4_open_ops,
2273 .callback_data = data,
101070ca 2274 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2275 .flags = RPC_TASK_ASYNC,
2276 };
24ac23ab
TM		 2277 int status;
2278
a9c92d6b 2279 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 2280 kref_get(&data->kref);
3e309914
TM		 2281 data->rpc_done = 0;
2282 data->rpc_status = 0;
2ced46c2 2283 data->cancelled = 0;
bdeca1b7
TM		 2284 data->is_recover = 0;
2285 if (isrecover) {
8fe72bac 2286 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 2287 data->is_recover = 1;
2288 }
c970aa85 2289 task = rpc_run_task(&task_setup_data);
b257957e
AB		 2290 if (IS_ERR(task))
2291 return PTR_ERR(task);
2292 status = nfs4_wait_for_completion_rpc_task(task);
2293 if (status != 0) {
2294 data->cancelled = 1;
2295 smp_wmb();
2296 } else
2297 status = data->rpc_status;
2298 rpc_put_task(task);
2299
2300 return status;
2301}
2302
2303static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2304{
2b0143b5 2305 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2306 struct nfs_openres *o_res = &data->o_res;
2307 int status;
2308
2309 status = nfs4_run_open_task(data, 1);
2310 if (status != 0 || !data->rpc_done)
2311 return status;
2312
6926afd1
TM		 2313 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2314
b257957e
AB		 2315 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2316 status = _nfs4_proc_open_confirm(data);
2317 if (status != 0)
2318 return status;
2319 }
2320
2321 return status;
2322}
2323
f3792d63
TM		 2324/*
2325 * Additional permission checks in order to distinguish between an
2326 * open for read, and an open for execute. This works around the
2327 * fact that NFSv4 OPEN treats read and execute permissions as being
2328 * the same.
2329 * Note that in the non-execute case, we want to turn off permission
2330 * checking if we just created a new file (POSIX open() semantics).
2331 */
6168f62c
WAA		 2332static int nfs4_opendata_access(struct rpc_cred *cred,
2333 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2334 struct nfs4_state *state, fmode_t fmode,
2335 int openflags)
6168f62c
WAA		 2336{
2337 struct nfs_access_entry cache;
2338 u32 mask;
2339
2340 /* access call failed or for some reason the server doesn't
2341 * support any access modes -- defer access call until later */
2342 if (opendata->o_res.access_supported == 0)
2343 return 0;
2344
2345 mask = 0;
f3792d63
TM		 2346 /*
2347 * Use openflags to check for exec, because fmode won't
2348 * always have FMODE_EXEC set when file open for exec.
2349 */
f8d9a897
WAA		 2350 if (openflags & __FMODE_EXEC) {
2351 /* ONLY check for exec rights */
2352 mask = MAY_EXEC;
f3792d63 2353 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2354 mask = MAY_READ;
6168f62c
WAA		 2355
2356 cache.cred = cred;
2357 cache.jiffies = jiffies;
2358 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2359 nfs_access_add_cache(state->inode, &cache);
2360
bbd3a8ee 2361 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2362 return 0;
2363
2364 /* even though OPEN succeeded, access is denied. Close the file */
2365 nfs4_close_state(state, fmode);
998f40b5 2366 return -EACCES;
6168f62c
WAA		 2367}
2368
b257957e
AB		 2369/*
2370 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2371 */
2372static int _nfs4_proc_open(struct nfs4_opendata *data)
2373{
2b0143b5 2374 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2375 struct nfs_server *server = NFS_SERVER(dir);
2376 struct nfs_openargs *o_arg = &data->o_arg;
2377 struct nfs_openres *o_res = &data->o_res;
2378 int status;
2379
2380 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2381 if (!data->rpc_done)
2382 return status;
2383 if (status != 0) {
2384 if (status == -NFS4ERR_BADNAME &&
2385 !(o_arg->open_flags & O_CREAT))
2386 return -ENOENT;
24ac23ab 2387 return status;
08ef7bd3 2388 }
24ac23ab 2389
6926afd1
TM		 2390 nfs_fattr_map_and_free_names(server, &data->f_attr);
2391
5bc2afc2 2392 if (o_arg->open_flags & O_CREAT) {
5bc2afc2
TM		 2393 if (o_arg->open_flags & O_EXCL)
2394 data->file_created = 1;
2395 else if (o_res->cinfo.before != o_res->cinfo.after)
2396 data->file_created = 1;
2dfc6173
TM		 2397 if (data->file_created || dir->i_version != o_res->cinfo.after)
2398 update_changeattr(dir, &o_res->cinfo);
5bc2afc2 2399 }
0df5dd4a
TM		 2400 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2401 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2402 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2403 status = _nfs4_proc_open_confirm(data);
1da177e4 2404 if (status != 0)
24ac23ab 2405 return status;
1da177e4
LT		 2406 }
2407 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2408 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2409 return 0;
1da177e4
LT		 2410}
2411
d83217c1
AA		 2412static int nfs4_recover_expired_lease(struct nfs_server *server)
2413{
2414 return nfs4_client_recover_expired_lease(server->nfs_client);
2415}
2416
1da177e4
LT		 2417/*
2418 * OPEN_EXPIRED:
2419 * reclaim state on the server after a network partition.
2420 * Assumes caller holds the appropriate lock
2421 */
539cd03a 2422static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2423{
e56e0b78 2424 struct nfs4_opendata *opendata;
864472e9 2425 int ret;
1da177e4 2426
4a1c0893 2427 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2428 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2429 if (IS_ERR(opendata))
2430 return PTR_ERR(opendata);
864472e9 2431 ret = nfs4_open_recover(opendata, state);
35d05778 2432 if (ret == -ESTALE)
3d4ff43d 2433 d_drop(ctx->dentry);
c6d00e63 2434 nfs4_opendata_put(opendata);
864472e9 2435 return ret;
1da177e4
LT		 2436}
2437
a9ed2e25 2438static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2439{
539cd03a 2440 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2441 struct nfs4_exception exception = { };
2442 int err;
2443
2444 do {
539cd03a 2445 err = _nfs4_open_expired(ctx, state);
42113a75 2446 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2447 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2448 continue;
a9ed2e25
TM		 2449 switch (err) {
2450 default:
2451 goto out;
2452 case -NFS4ERR_GRACE:
2453 case -NFS4ERR_DELAY:
2454 nfs4_handle_exception(server, err, &exception);
2455 err = 0;
2456 }
202b50dc 2457 } while (exception.retry);
a9ed2e25 2458out:
202b50dc
TM		 2459 return err;
2460}
2461
1da177e4
LT		 2462static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2463{
1da177e4 2464 struct nfs_open_context *ctx;
864472e9 2465 int ret;
1da177e4 2466
864472e9
TM		 2467 ctx = nfs4_state_find_open_context(state);
2468 if (IS_ERR(ctx))
91876b13 2469 return -EAGAIN;
539cd03a 2470 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2471 put_nfs_open_context(ctx);
2472 return ret;
1da177e4
LT		 2473}
2474
41020b67
TM		 2475static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
2476 const nfs4_stateid *stateid)
4dfd4f7a 2477{
41020b67 2478 nfs_remove_bad_delegation(state->inode, stateid);
4dfd4f7a
TM		 2479 write_seqlock(&state->seqlock);
2480 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2481 write_sequnlock(&state->seqlock);
2482 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2483}
2484
2485static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2486{
2487 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
41020b67 2488 nfs_finish_clear_delegation_stateid(state, NULL);
4dfd4f7a
TM		 2489}
2490
2491static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2492{
2493 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2494 nfs40_clear_delegation_stateid(state);
2495 return nfs4_open_expired(sp, state);
2496}
2497
45870d69
TM		 2498static int nfs40_test_and_free_expired_stateid(struct nfs_server *server,
2499 nfs4_stateid *stateid,
2500 struct rpc_cred *cred)
2501{
2502 return -NFS4ERR_BAD_STATEID;
2503}
2504
f062eb6c 2505#if defined(CONFIG_NFS_V4_1)
4586f6e2
TM		 2506static int nfs41_test_and_free_expired_stateid(struct nfs_server *server,
2507 nfs4_stateid *stateid,
2508 struct rpc_cred *cred)
2509{
2510 int status;
2511
f7a62ada
TM		 2512 switch (stateid->type) {
2513 default:
2514 break;
2515 case NFS4_INVALID_STATEID_TYPE:
2516 case NFS4_SPECIAL_STATEID_TYPE:
2517 return -NFS4ERR_BAD_STATEID;
2518 case NFS4_REVOKED_STATEID_TYPE:
2519 goto out_free;
2520 }
4586f6e2 2521
f7a62ada 2522 status = nfs41_test_stateid(server, stateid, cred);
4586f6e2
TM		 2523 switch (status) {
2524 case -NFS4ERR_EXPIRED:
2525 case -NFS4ERR_ADMIN_REVOKED:
2526 case -NFS4ERR_DELEG_REVOKED:
f7a62ada
TM		 2527 break;
2528 default:
4586f6e2
TM		 2529 return status;
2530 }
f7a62ada
TM		 2531out_free:
2532 /* Ack the revoked state to the server */
f0b0bf88 2533 nfs41_free_stateid(server, stateid, cred, true);
f7a62ada 2534 return -NFS4ERR_EXPIRED;
4586f6e2
TM		 2535}
2536
0c116cad 2537static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2538{
f062eb6c 2539 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2540 nfs4_stateid stateid;
ab7cb0df 2541 struct nfs_delegation *delegation;
0c116cad
TM		 2542 struct rpc_cred *cred;
2543 int status;
3e60ffdd 2544
ab7cb0df
TM		 2545 /* Get the delegation credential for use by test/free_stateid */
2546 rcu_read_lock();
2547 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2548 if (delegation == NULL) {
ab7cb0df 2549 rcu_read_unlock();
0c116cad
TM		 2550 return;
2551 }
2552
2553 nfs4_stateid_copy(&stateid, &delegation->stateid);
4c8e5447
TM		 2554 if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags)) {
2555 rcu_read_unlock();
41020b67 2556 nfs_finish_clear_delegation_stateid(state, &stateid);
4c8e5447
TM		 2557 return;
2558 }
0c116cad 2559
63d63cbf
TM		 2560 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED, &delegation->flags)) {
2561 rcu_read_unlock();
2562 return;
2563 }
2564
0c116cad
TM		 2565 cred = get_rpccred(delegation->cred);
2566 rcu_read_unlock();
4586f6e2 2567 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
0c116cad 2568 trace_nfs4_test_delegation_stateid(state, NULL, status);
f7a62ada 2569 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID)
41020b67 2570 nfs_finish_clear_delegation_stateid(state, &stateid);
ab7cb0df 2571
0c116cad 2572 put_rpccred(cred);
3e60ffdd
CL		 2573}
2574
c5896fc8
TM		 2575/**
2576 * nfs41_check_expired_locks - possibly free a lock stateid
2577 *
2578 * @state: NFSv4 state for an inode
2579 *
2580 * Returns NFS_OK if recovery for this stateid is now finished.
2581 * Otherwise a negative NFS4ERR value is returned.
2582 */
2583static int nfs41_check_expired_locks(struct nfs4_state *state)
2584{
2585 int status, ret = NFS_OK;
d75a6a0e 2586 struct nfs4_lock_state *lsp, *prev = NULL;
c5896fc8
TM		 2587 struct nfs_server *server = NFS_SERVER(state->inode);
2588
2589 if (!test_bit(LK_STATE_IN_USE, &state->flags))
2590 goto out;
d75a6a0e
BC		 2591
2592 spin_lock(&state->state_lock);
c5896fc8
TM		 2593 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
2594 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
2595 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
2596
d75a6a0e
BC		 2597 atomic_inc(&lsp->ls_count);
2598 spin_unlock(&state->state_lock);
2599
2600 nfs4_put_lock_state(prev);
2601 prev = lsp;
2602
c5896fc8
TM		 2603 status = nfs41_test_and_free_expired_stateid(server,
2604 &lsp->ls_stateid,
2605 cred);
2606 trace_nfs4_test_lock_stateid(state, lsp, status);
2607 if (status == -NFS4ERR_EXPIRED ||
2608 status == -NFS4ERR_BAD_STATEID) {
2609 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
67dd4830 2610 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE;
c5896fc8
TM		 2611 if (!recover_lost_locks)
2612 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2613 } else if (status != NFS_OK) {
2614 ret = status;
d75a6a0e
BC		 2615 nfs4_put_lock_state(prev);
2616 goto out;
c5896fc8 2617 }
d75a6a0e 2618 spin_lock(&state->state_lock);
c5896fc8 2619 }
d75a6a0e
BC		 2620 }
2621 spin_unlock(&state->state_lock);
2622 nfs4_put_lock_state(prev);
c5896fc8
TM		 2623out:
2624 return ret;
2625}
2626
3e60ffdd
CL		 2627/**
2628 * nfs41_check_open_stateid - possibly free an open stateid
2629 *
2630 * @state: NFSv4 state for an inode
2631 *
2632 * Returns NFS_OK if recovery for this stateid is now finished.
2633 * Otherwise a negative NFS4ERR value is returned.
2634 */
2635static int nfs41_check_open_stateid(struct nfs4_state *state)
2636{
2637 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2638 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2639 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2640 int status;
2641
b134fc4a 2642 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) {
8a64c4ef
TM		 2643 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) {
2644 if (nfs4_have_delegation(state->inode, state->state))
2645 return NFS_OK;
2646 return -NFS4ERR_OPENMODE;
2647 }
3e60ffdd 2648 return -NFS4ERR_BAD_STATEID;
b134fc4a 2649 }
4586f6e2 2650 status = nfs41_test_and_free_expired_stateid(server, stateid, cred);
08cb47fa 2651 trace_nfs4_test_open_stateid(state, NULL, status);
f7a62ada 2652 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) {
3e60ffdd
CL		 2653 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2654 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2655 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2656 clear_bit(NFS_OPEN_STATE, &state->flags);
67dd4830 2657 stateid->type = NFS4_INVALID_STATEID_TYPE;
b01dd1d8 2658 }
8a64c4ef
TM		 2659 if (status != NFS_OK)
2660 return status;
2661 if (nfs_open_stateid_recover_openmode(state))
2662 return -NFS4ERR_OPENMODE;
2663 return NFS_OK;
b01dd1d8
BS		 2664}
2665
2666static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2667{
eb64cf96 2668 int status;
b01dd1d8 2669
0c116cad 2670 nfs41_check_delegation_stateid(state);
c5896fc8
TM		 2671 status = nfs41_check_expired_locks(state);
2672 if (status != NFS_OK)
2673 return status;
3e60ffdd 2674 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2675 if (status != NFS_OK)
2676 status = nfs4_open_expired(sp, state);
2677 return status;
f062eb6c
BS		 2678}
2679#endif
2680
aa53ed54
JL		 2681/*
2682 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2683 * fields corresponding to attributes that were used to store the verifier.
2684 * Make sure we clobber those fields in the later setattr call
2685 */
5334c5bd
KM		 2686static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2687 struct iattr *sattr, struct nfs4_label **label)
aa53ed54 2688{
5334c5bd
KM		 2689 const u32 *attrset = opendata->o_res.attrset;
2690
2691 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
aa53ed54
JL		 2692 !(sattr->ia_valid & ATTR_ATIME_SET))
2693 sattr->ia_valid |= ATTR_ATIME;
2694
5334c5bd 2695 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
aa53ed54
JL		 2696 !(sattr->ia_valid & ATTR_MTIME_SET))
2697 sattr->ia_valid |= ATTR_MTIME;
5334c5bd
KM		 2698
2699 /* Except MODE, it seems harmless of setting twice. */
2700 if ((attrset[1] & FATTR4_WORD1_MODE))
2701 sattr->ia_valid &= ~ATTR_MODE;
2702
2703 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2704 *label = NULL;
aa53ed54
JL		 2705}
2706
c21443c2
TM		 2707static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2708 fmode_t fmode,
2709 int flags,
3efb9722 2710 struct nfs_open_context *ctx)
c21443c2
TM		 2711{
2712 struct nfs4_state_owner *sp = opendata->owner;
2713 struct nfs_server *server = sp->so_server;
275bb307 2714 struct dentry *dentry;
c21443c2
TM		 2715 struct nfs4_state *state;
2716 unsigned int seq;
2717 int ret;
2718
2719 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2720
2721 ret = _nfs4_proc_open(opendata);
dca78001 2722 if (ret != 0)
c21443c2
TM		 2723 goto out;
2724
2725 state = nfs4_opendata_to_nfs4_state(opendata);
2726 ret = PTR_ERR(state);
2727 if (IS_ERR(state))
2728 goto out;
2729 if (server->caps & NFS_CAP_POSIX_LOCK)
2730 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
a8ce377a
JL		 2731 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
2732 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
c21443c2 2733
275bb307 2734 dentry = opendata->dentry;
2b0143b5 2735 if (d_really_is_negative(dentry)) {
668d0cd5 2736 struct dentry *alias;
275bb307 2737 d_drop(dentry);
668d0cd5
AV		 2738 alias = d_exact_alias(dentry, state->inode);
2739 if (!alias)
2740 alias = d_splice_alias(igrab(state->inode), dentry);
2741 /* d_splice_alias() can't fail here - it's a non-directory */
2742 if (alias) {
275bb307 2743 dput(ctx->dentry);
668d0cd5 2744 ctx->dentry = dentry = alias;
275bb307
TM		 2745 }
2746 nfs_set_verifier(dentry,
2b0143b5 2747 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2748 }
2749
c21443c2
TM		 2750 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2751 if (ret != 0)
2752 goto out;
2753
3efb9722 2754 ctx->state = state;
2b0143b5 2755 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2756 nfs_inode_attach_open_context(ctx);
2757 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2758 nfs4_schedule_stateid_recovery(server, state);
2759 }
c21443c2
TM		 2760out:
2761 return ret;
2762}
2763
1da177e4 2764/*
24ac23ab 2765 * Returns a referenced nfs4_state
1da177e4 2766 */
82be417a 2767static int _nfs4_do_open(struct inode *dir,
4197a055 2768 struct nfs_open_context *ctx,
82be417a
AA		 2769 int flags,
2770 struct iattr *sattr,
5bc2afc2
TM		 2771 struct nfs4_label *label,
2772 int *opened)
1da177e4
LT		 2773{
2774 struct nfs4_state_owner *sp;
2775 struct nfs4_state *state = NULL;
2776 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2777 struct nfs4_opendata *opendata;
4197a055
TM		 2778 struct dentry *dentry = ctx->dentry;
2779 struct rpc_cred *cred = ctx->cred;
2780 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2781 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2782 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2783 struct nfs4_label *olabel = NULL;
aac00a8d 2784 int status;
1da177e4
LT		 2785
2786 /* Protect against reboot recovery conflicts */
1da177e4 2787 status = -ENOMEM;
d1e284d5
TM		 2788 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2789 if (sp == NULL) {
1da177e4
LT		 2790 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2791 goto out_err;
2792 }
58d9714a
TM		 2793 status = nfs4_recover_expired_lease(server);
2794 if (status != 0)
b4454fe1 2795 goto err_put_state_owner;
2b0143b5
DH		 2796 if (d_really_is_positive(dentry))
2797 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2798 status = -ENOMEM;
2b0143b5 2799 if (d_really_is_positive(dentry))
49f9a0fa 2800 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2801 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2802 label, claim, GFP_KERNEL);
e56e0b78 2803 if (opendata == NULL)
95d35cb4 2804 goto err_put_state_owner;
1da177e4 2805
14c43f76
DQ		 2806 if (label) {
2807 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2808 if (IS_ERR(olabel)) {
2809 status = PTR_ERR(olabel);
2810 goto err_opendata_put;
2811 }
2812 }
2813
e911b815
TM		 2814 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2815 if (!opendata->f_attr.mdsthreshold) {
2816 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2817 if (!opendata->f_attr.mdsthreshold)
2818 goto err_free_label;
2819 }
1549210f 2820 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2821 }
2b0143b5
DH		 2822 if (d_really_is_positive(dentry))
2823 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2824
3efb9722 2825 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2826 if (status != 0)
14c43f76 2827 goto err_free_label;
3efb9722 2828 state = ctx->state;
6168f62c 2829
efcbc04e 2830 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 2831 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
5334c5bd 2832 nfs4_exclusive_attrset(opendata, sattr, &label);
a1d1c4f1
TM		 2833 /*
2834 * send create attributes which was not set by open
2835 * with an extra setattr.
2836 */
2837 if (sattr->ia_valid & NFS4_VALID_ATTRS) {
2838 nfs_fattr_init(opendata->o_res.f_attr);
2839 status = nfs4_do_setattr(state->inode, cred,
2840 opendata->o_res.f_attr, sattr,
29b59f94 2841 ctx, label, olabel);
a1d1c4f1
TM		 2842 if (status == 0) {
2843 nfs_setattr_update_inode(state->inode, sattr,
2844 opendata->o_res.f_attr);
2845 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2846 }
1775fd3e 2847 }
0ab64e0e 2848 }
c5c3fb5f 2849 if (opened && opendata->file_created)
5bc2afc2 2850 *opened |= FILE_CREATED;
82be417a 2851
e911b815 2852 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2853 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2854 opendata->f_attr.mdsthreshold = NULL;
2855 }
82be417a 2856
14c43f76
DQ		 2857 nfs4_label_free(olabel);
2858
c6d00e63 2859 nfs4_opendata_put(opendata);
1da177e4 2860 nfs4_put_state_owner(sp);
1da177e4 2861 return 0;
14c43f76
DQ		 2862err_free_label:
2863 nfs4_label_free(olabel);
c6d00e63
TM		 2864err_opendata_put:
2865 nfs4_opendata_put(opendata);
e56e0b78
TM		 2866err_put_state_owner:
2867 nfs4_put_state_owner(sp);
1da177e4 2868out_err:
1da177e4
LT		 2869 return status;
2870}
2871
2872
82be417a 2873static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2874 struct nfs_open_context *ctx,
82be417a
AA		 2875 int flags,
2876 struct iattr *sattr,
5bc2afc2
TM		 2877 struct nfs4_label *label,
2878 int *opened)
1da177e4 2879{
49f9a0fa 2880 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2881 struct nfs4_exception exception = { };
2882 struct nfs4_state *res;
2883 int status;
2884
2885 do {
5bc2afc2 2886 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2887 res = ctx->state;
42113a75 2888 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2889 if (status == 0)
2890 break;
2891 /* NOTE: BAD_SEQID means the server and client disagree about the
2892 * book-keeping w.r.t. state-changing operations
2893 * (OPEN/CLOSE/LOCK/LOCKU...)
2894 * It is actually a sign of a bug on the client or on the server.
2895 *
2896 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2897 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2898 * have unhashed the old state_owner for us, and that we can
2899 * therefore safely retry using a new one. We should still warn
2900 * the user though...
2901 */
2902 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2903 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2904 " returned a bad sequence-id error!\n",
2905 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2906 exception.retry = 1;
2907 continue;
2908 }
550f5747
TM		 2909 /*
2910 * BAD_STATEID on OPEN means that the server cancelled our
2911 * state before it received the OPEN_CONFIRM.
2912 * Recover by retrying the request as per the discussion
2913 * on Page 181 of RFC3530.
2914 */
2915 if (status == -NFS4ERR_BAD_STATEID) {
2916 exception.retry = 1;
2917 continue;
2918 }
aac00a8d
TM		 2919 if (status == -EAGAIN) {
2920 /* We must have found a delegation */
2921 exception.retry = 1;
2922 continue;
2923 }
49f9a0fa
TM		 2924 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2925 continue;
2926 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2927 status, &exception));
2928 } while (exception.retry);
2929 return res;
2930}
2931
8487c479
TM		 2932static int _nfs4_do_setattr(struct inode *inode,
2933 struct nfs_setattrargs *arg,
2934 struct nfs_setattrres *res,
2935 struct rpc_cred *cred,
29b59f94 2936 struct nfs_open_context *ctx)
1da177e4 2937{
3e4f6290 2938 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2939 struct rpc_message msg = {
659bfcd6 2940 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
8487c479
TM		 2941 .rpc_argp = arg,
2942 .rpc_resp = res,
659bfcd6 2943 .rpc_cred = cred,
1da177e4 2944 };
abf4e13c 2945 struct rpc_cred *delegation_cred = NULL;
26e976a8 2946 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2947 fmode_t fmode;
2948 bool truncate;
65e4308d 2949 int status;
1da177e4 2950
8487c479 2951 nfs_fattr_init(res->fattr);
1da177e4 2952
ee3ae84e 2953 /* Servers should only apply open mode checks for file size changes */
8487c479 2954 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
ee3ae84e
TM		 2955 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2956
8487c479 2957 if (nfs4_copy_delegation_stateid(inode, fmode, &arg->stateid, &delegation_cred)) {
ee3ae84e 2958 /* Use that stateid */
29b59f94 2959 } else if (truncate && ctx != NULL) {
17393475 2960 struct nfs_lock_context *l_ctx;
29b59f94 2961 if (!nfs4_valid_open_stateid(ctx->state))
0418dae1 2962 return -EBADF;
17393475
N		 2963 l_ctx = nfs_get_lock_context(ctx);
2964 if (IS_ERR(l_ctx))
2965 return PTR_ERR(l_ctx);
7a0566b3
N		 2966 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx,
2967 &arg->stateid, &delegation_cred);
2968 nfs_put_lock_context(l_ctx);
2969 if (status == -EIO)
0418dae1 2970 return -EBADF;
08e9eac4 2971 } else
8487c479 2972 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
abf4e13c
TM		 2973 if (delegation_cred)
2974 msg.rpc_cred = delegation_cred;
1da177e4 2975
8487c479 2976 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
abf4e13c
TM		 2977
2978 put_rpccred(delegation_cred);
29b59f94 2979 if (status == 0 && ctx != NULL)
26e976a8 2980 renew_lease(server, timestamp);
8487c479 2981 trace_nfs4_setattr(inode, &arg->stateid, status);
65e4308d 2982 return status;
1da177e4
LT		 2983}
2984
659bfcd6
TM		 2985static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2986 struct nfs_fattr *fattr, struct iattr *sattr,
29b59f94 2987 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
1775fd3e 2988 struct nfs4_label *olabel)
1da177e4 2989{
3e4f6290 2990 struct nfs_server *server = NFS_SERVER(inode);
29b59f94 2991 struct nfs4_state *state = ctx ? ctx->state : NULL;
8487c479
TM		 2992 struct nfs_setattrargs arg = {
2993 .fh = NFS_FH(inode),
2994 .iap = sattr,
2995 .server = server,
2996 .bitmask = server->attr_bitmask,
2997 .label = ilabel,
2998 };
2999 struct nfs_setattrres res = {
3000 .fattr = fattr,
3001 .label = olabel,
3002 .server = server,
3003 };
a1d0b5ee
TM		 3004 struct nfs4_exception exception = {
3005 .state = state,
3114ea7a 3006 .inode = inode,
8487c479 3007 .stateid = &arg.stateid,
a1d0b5ee 3008 };
1da177e4 3009 int err;
8487c479
TM		 3010
3011 arg.bitmask = nfs4_bitmask(server, ilabel);
3012 if (ilabel)
3013 arg.bitmask = nfs4_bitmask(server, olabel);
3014
1da177e4 3015 do {
29b59f94 3016 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx);
451146be
TM		 3017 switch (err) {
3018 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 3019 if (!(sattr->ia_valid & ATTR_SIZE)) {
3020 pr_warn_once("NFSv4: server %s is incorrectly "
3021 "applying open mode checks to "
3022 "a SETATTR that is not "
3023 "changing file size.\n",
3024 server->nfs_client->cl_hostname);
3025 }
451146be
TM		 3026 if (state && !(state->state & FMODE_WRITE)) {
3027 err = -EBADF;
3028 if (sattr->ia_valid & ATTR_OPEN)
3029 err = -EACCES;
3030 goto out;
3031 }
3032 }
3033 err = nfs4_handle_exception(server, err, &exception);
1da177e4 3034 } while (exception.retry);
451146be 3035out:
1da177e4
LT		 3036 return err;
3037}
3038
500d701f
PT		 3039static bool
3040nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
3041{
3042 if (inode == NULL || !nfs_have_layout(inode))
3043 return false;
3044
3045 return pnfs_wait_on_layoutreturn(inode, task);
3046}
3047
1da177e4
LT		 3048struct nfs4_closedata {
3049 struct inode *inode;
3050 struct nfs4_state *state;
3051 struct nfs_closeargs arg;
3052 struct nfs_closeres res;
cf805165
TM		 3053 struct {
3054 struct nfs4_layoutreturn_args arg;
3055 struct nfs4_layoutreturn_res res;
4d796d75 3056 struct nfs4_xdr_opaque_data ld_private;
cf805165
TM		 3057 u32 roc_barrier;
3058 bool roc;
3059 } lr;
516a6af6 3060 struct nfs_fattr fattr;
26e976a8 3061 unsigned long timestamp;
1da177e4
LT		 3062};
3063
963d8fe5 3064static void nfs4_free_closedata(void *data)
9512135d 3065{
963d8fe5
TM		 3066 struct nfs4_closedata *calldata = data;
3067 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 3068 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 3069
cf805165 3070 if (calldata->lr.roc)
1c5bd76d
TM		 3071 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res,
3072 calldata->res.lr_ret);
9512135d
TM		 3073 nfs4_put_open_state(calldata->state);
3074 nfs_free_seqid(calldata->arg.seqid);
9512135d 3075 nfs4_put_state_owner(sp);
322b2b90 3076 nfs_sb_deactive(sb);
9512135d
TM		 3077 kfree(calldata);
3078}
3079
963d8fe5 3080static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 3081{
963d8fe5 3082 struct nfs4_closedata *calldata = data;
1da177e4 3083 struct nfs4_state *state = calldata->state;
1da177e4 3084 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 3085 nfs4_stateid *res_stateid = NULL;
1da177e4 3086
a3ca5651 3087 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 3088 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3089 return;
42113a75 3090 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
cf805165
TM		 3091
3092 /* Handle Layoutreturn errors */
3093 if (calldata->arg.lr_args && task->tk_status != 0) {
3094 switch (calldata->res.lr_ret) {
3095 default:
3096 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
3097 break;
3098 case 0:
3099 calldata->arg.lr_args = NULL;
3100 calldata->res.lr_res = NULL;
3101 break;
3102 case -NFS4ERR_ADMIN_REVOKED:
3103 case -NFS4ERR_DELEG_REVOKED:
3104 case -NFS4ERR_EXPIRED:
3105 case -NFS4ERR_BAD_STATEID:
3106 case -NFS4ERR_OLD_STATEID:
3107 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
3108 case -NFS4ERR_WRONG_CRED:
3109 calldata->arg.lr_args = NULL;
3110 calldata->res.lr_res = NULL;
3111 calldata->res.lr_ret = 0;
3112 rpc_restart_call_prepare(task);
3113 return;
3114 }
3115 }
3116
1da177e4
LT		 3117 /* hmm. we are done with the inode, and in the process of freeing
3118 * the state_owner. we keep this around to process errors
3119 */
1da177e4
LT		 3120 switch (task->tk_status) {
3121 case 0:
412f6c4c 3122 res_stateid = &calldata->res.stateid;
26e976a8 3123 renew_lease(server, calldata->timestamp);
412f6c4c 3124 break;
f07d4a31
TM		 3125 case -NFS4ERR_ACCESS:
3126 if (calldata->arg.bitmask != NULL) {
3127 calldata->arg.bitmask = NULL;
3128 calldata->res.fattr = NULL;
3129 task->tk_status = 0;
3130 rpc_restart_call_prepare(task);
3131 goto out_release;
3132
3133 }
3134 break;
69794ad7 3135 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 3136 case -NFS4ERR_STALE_STATEID:
26d36301
TM		 3137 case -NFS4ERR_EXPIRED:
3138 nfs4_free_revoked_stateid(server,
3139 &calldata->arg.stateid,
3140 task->tk_msg.rpc_cred);
9e33bed5
TM		 3141 case -NFS4ERR_OLD_STATEID:
3142 case -NFS4ERR_BAD_STATEID:
566fcec6 3143 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 3144 &state->open_stateid)) {
566fcec6
TM		 3145 rpc_restart_call_prepare(task);
3146 goto out_release;
3147 }
dc0b027d 3148 if (calldata->arg.fmode == 0)
9e33bed5 3149 break;
1da177e4 3150 default:
8478eaa1 3151 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 3152 rpc_restart_call_prepare(task);
69794ad7
TM		 3153 goto out_release;
3154 }
1da177e4 3155 }
4a1e2feb
TM		 3156 nfs_clear_open_stateid(state, &calldata->arg.stateid,
3157 res_stateid, calldata->arg.fmode);
69794ad7 3158out_release:
72211dbe 3159 nfs_release_seqid(calldata->arg.seqid);
d8d84983 3160 nfs_refresh_inode(calldata->inode, &calldata->fattr);
a3ca5651 3161 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 3162}
3163
4ce70ada 3164static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 3165{
4ce70ada 3166 struct nfs4_closedata *calldata = data;
9512135d 3167 struct nfs4_state *state = calldata->state;
7fdab069 3168 struct inode *inode = calldata->inode;
aee7af35 3169 bool is_rdonly, is_wronly, is_rdwr;
88069f77 3170 int call_close = 0;
9512135d 3171
a3ca5651 3172 dprintk("%s: begin!\n", __func__);
963d8fe5 3173 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 3174 goto out_wait;
003707c7 3175
88069f77 3176 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 3177 spin_lock(&state->owner->so_lock);
aee7af35
TM		 3178 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
3179 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
3180 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 3181 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 3182 /* Calculate the change in open mode */
cd9288ff 3183 calldata->arg.fmode = 0;
e7616923 3184 if (state->n_rdwr == 0) {
cd9288ff
TM		 3185 if (state->n_rdonly == 0)
3186 call_close |= is_rdonly;
3187 else if (is_rdonly)
3188 calldata->arg.fmode |= FMODE_READ;
3189 if (state->n_wronly == 0)
3190 call_close |= is_wronly;
3191 else if (is_wronly)
3192 calldata->arg.fmode |= FMODE_WRITE;
e547f262
TM		 3193 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
3194 call_close |= is_rdwr;
cd9288ff
TM		 3195 } else if (is_rdwr)
3196 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
3197
5cc7861e
TM		 3198 if (!nfs4_valid_open_stateid(state) ||
3199 test_bit(NFS_OPEN_STATE, &state->flags) == 0)
5d422301 3200 call_close = 0;
4cecb76f 3201 spin_unlock(&state->owner->so_lock);
88069f77
TM		 3202
3203 if (!call_close) {
963d8fe5 3204 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 3205 goto out_no_action;
9512135d 3206 }
88069f77 3207
1c5bd76d 3208 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) {
500d701f
PT		 3209 nfs_release_seqid(calldata->arg.seqid);
3210 goto out_wait;
3211 }
3212
9413a1a1 3213 if (calldata->arg.fmode == 0)
88069f77 3214 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3ecefc92 3215
9413a1a1 3216 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) {
3ecefc92
TM		 3217 /* Close-to-open cache consistency revalidation */
3218 if (!nfs4_have_delegation(inode, FMODE_READ))
3219 calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask;
3220 else
3221 calldata->arg.bitmask = NULL;
3222 }
3c13cb5b 3223
6ae37339
TM		 3224 calldata->arg.share_access =
3225 nfs4_map_atomic_open_share(NFS_SERVER(inode),
3226 calldata->arg.fmode, 0);
88069f77 3227
d8d84983
TM		 3228 if (calldata->res.fattr == NULL)
3229 calldata->arg.bitmask = NULL;
3230 else if (calldata->arg.bitmask == NULL)
3231 calldata->res.fattr = NULL;
26e976a8 3232 calldata->timestamp = jiffies;
7fdab069 3233 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 3234 &calldata->arg.seq_args,
3235 &calldata->res.seq_res,
2240a9e2
TM		 3236 task) != 0)
3237 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 3238 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 3239 return;
3240out_no_action:
3241 task->tk_action = NULL;
3242out_wait:
3243 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 3244}
3245
963d8fe5 3246static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 3247 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 3248 .rpc_call_done = nfs4_close_done,
3249 .rpc_release = nfs4_free_closedata,
3250};
3251
1da177e4
LT		 3252/*
3253 * It is possible for data to be read/written from a mem-mapped file
3254 * after the sys_close call (which hits the vfs layer as a flush).
3255 * This means that we can't safely call nfsv4 close on a file until
3256 * the inode is cleared. This in turn means that we are not good
3257 * NFSv4 citizens - we do not indicate to the server to update the file's
3258 * share state even when we are done with one of the three share
3259 * stateid's in the inode.
3260 *
3261 * NOTE: Caller must be holding the sp->so_owner semaphore!
3262 */
1f7977c1 3263int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 3264{
4a35bd41 3265 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 3266 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 3267 struct nfs4_closedata *calldata;
b39e625b
TM		 3268 struct nfs4_state_owner *sp = state->owner;
3269 struct rpc_task *task;
5138fde0
TM		 3270 struct rpc_message msg = {
3271 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3272 .rpc_cred = state->owner->so_cred,
3273 };
c970aa85
TM		 3274 struct rpc_task_setup task_setup_data = {
3275 .rpc_client = server->client,
5138fde0 3276 .rpc_message = &msg,
c970aa85 3277 .callback_ops = &nfs4_close_ops,
101070ca 3278 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3279 .flags = RPC_TASK_ASYNC,
3280 };
9512135d 3281 int status = -ENOMEM;
1da177e4 3282
fa940720
WAA		 3283 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3284 &task_setup_data.rpc_client, &msg);
3285
8535b2be 3286 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 3287 if (calldata == NULL)
9512135d 3288 goto out;
a9c92d6b 3289 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 3290 calldata->inode = state->inode;
1da177e4 3291 calldata->state = state;
4a35bd41 3292 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 3293 /* Serialization for the sequence id */
63f5f796
TM		 3294 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3295 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 3296 if (IS_ERR(calldata->arg.seqid))
9512135d 3297 goto out_free_calldata;
d8d84983 3298 nfs_fattr_init(&calldata->fattr);
dc0b027d 3299 calldata->arg.fmode = 0;
4d796d75 3300 calldata->lr.arg.ld_private = &calldata->lr.ld_private;
516a6af6 3301 calldata->res.fattr = &calldata->fattr;
c1d51931 3302 calldata->res.seqid = calldata->arg.seqid;
516a6af6 3303 calldata->res.server = server;
cf805165 3304 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
1c5bd76d
TM		 3305 calldata->lr.roc = pnfs_roc(state->inode,
3306 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred);
3307 if (calldata->lr.roc) {
3308 calldata->arg.lr_args = &calldata->lr.arg;
3309 calldata->res.lr_res = &calldata->lr.res;
3310 }
643168c2 3311 nfs_sb_active(calldata->inode->i_sb);
9512135d 3312
1174dd1f
TM		 3313 msg.rpc_argp = &calldata->arg;
3314 msg.rpc_resp = &calldata->res;
c970aa85
TM		 3315 task_setup_data.callback_data = calldata;
3316 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 3317 if (IS_ERR(task))
3318 return PTR_ERR(task);
a49c3c77
TM		 3319 status = 0;
3320 if (wait)
3321 status = rpc_wait_for_completion_task(task);
b39e625b 3322 rpc_put_task(task);
a49c3c77 3323 return status;
9512135d
TM		 3324out_free_calldata:
3325 kfree(calldata);
3326out:
b39e625b
TM		 3327 nfs4_put_open_state(state);
3328 nfs4_put_state_owner(sp);
9512135d 3329 return status;
1da177e4
LT		 3330}
3331
2b484297 3332static struct inode *
5bc2afc2
TM		 3333nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3334 int open_flags, struct iattr *attr, int *opened)
1da177e4 3335{
1da177e4 3336 struct nfs4_state *state;
aa9c2669
DQ		 3337 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3338
3339 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 3340
565277f6 3341 /* Protect against concurrent sillydeletes */
5bc2afc2 3342 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 3343
3344 nfs4_label_release_security(label);
3345
f46e0bd3
TM		 3346 if (IS_ERR(state))
3347 return ERR_CAST(state);
275bb307 3348 return state->inode;
1da177e4
LT		 3349}
3350
1185a552 3351static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 3352{
3353 if (ctx->state == NULL)
3354 return;
3355 if (is_sync)
643168c2 3356 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 3357 else
643168c2 3358 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 3359}
1da177e4 3360
b944dba3
TM		 3361#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3362#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
dff25ddb 3363#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_MODE_UMASK - 1UL)
b944dba3 3364
1da177e4
LT		 3365static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3366{
8c61282f 3367 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 3368 struct nfs4_server_caps_arg args = {
3369 .fhandle = fhandle,
8c61282f 3370 .bitmask = bitmask,
43652ad5 3371 };
1da177e4
LT		 3372 struct nfs4_server_caps_res res = {};
3373 struct rpc_message msg = {
3374 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 3375 .rpc_argp = &args,
1da177e4
LT		 3376 .rpc_resp = &res,
3377 };
3378 int status;
3379
8c61282f
KM		 3380 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3381 FATTR4_WORD0_FH_EXPIRE_TYPE |
3382 FATTR4_WORD0_LINK_SUPPORT |
3383 FATTR4_WORD0_SYMLINK_SUPPORT |
3384 FATTR4_WORD0_ACLSUPPORT;
3385 if (minorversion)
3386 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3387
7c513058 3388 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3389 if (status == 0) {
b944dba3 3390 /* Sanity check the server answers */
8c61282f 3391 switch (minorversion) {
b944dba3
TM		 3392 case 0:
3393 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3394 res.attr_bitmask[2] = 0;
3395 break;
3396 case 1:
3397 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3398 break;
3399 case 2:
3400 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3401 }
1da177e4 3402 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 3403 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3404 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3405 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3406 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 3407 NFS_CAP_CTIME|NFS_CAP_MTIME|
3408 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 3409 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3410 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 3411 server->caps |= NFS_CAP_ACLS;
3412 if (res.has_links != 0)
3413 server->caps |= NFS_CAP_HARDLINKS;
3414 if (res.has_symlinks != 0)
3415 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 3416 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3417 server->caps |= NFS_CAP_FILEID;
3418 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3419 server->caps |= NFS_CAP_MODE;
3420 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3421 server->caps |= NFS_CAP_NLINK;
3422 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3423 server->caps |= NFS_CAP_OWNER;
3424 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3425 server->caps |= NFS_CAP_OWNER_GROUP;
3426 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3427 server->caps |= NFS_CAP_ATIME;
3428 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3429 server->caps |= NFS_CAP_CTIME;
3430 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3431 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 3432#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3433 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3434 server->caps |= NFS_CAP_SECURITY_LABEL;
3435#endif
3436 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3437 sizeof(server->attr_bitmask));
b944dba3 3438 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 3439
a65318bf
TM		 3440 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3441 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3442 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 3443 server->cache_consistency_bitmask[2] = 0;
8c61282f
KM		 3444 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3445 sizeof(server->exclcreat_bitmask));
1da177e4 3446 server->acl_bitmask = res.acl_bitmask;
264e6351 3447 server->fh_expire_type = res.fh_expire_type;
1da177e4 3448 }
cccef3b9 3449
1da177e4
LT		 3450 return status;
3451}
3452
55a97593 3453int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 3454{
3455 struct nfs4_exception exception = { };
3456 int err;
3457 do {
3458 err = nfs4_handle_exception(server,
3459 _nfs4_server_capabilities(server, fhandle),
3460 &exception);
3461 } while (exception.retry);
3462 return err;
3463}
3464
3465static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3466 struct nfs_fsinfo *info)
3467{
aa9c2669 3468 u32 bitmask[3];
1da177e4 3469 struct nfs4_lookup_root_arg args = {
aa9c2669 3470 .bitmask = bitmask,
1da177e4
LT		 3471 };
3472 struct nfs4_lookup_res res = {
3473 .server = server,
0e574af1 3474 .fattr = info->fattr,
1da177e4
LT		 3475 .fh = fhandle,
3476 };
3477 struct rpc_message msg = {
3478 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3479 .rpc_argp = &args,
3480 .rpc_resp = &res,
3481 };
008f55d0 3482
aa9c2669
DQ		 3483 bitmask[0] = nfs4_fattr_bitmap[0];
3484 bitmask[1] = nfs4_fattr_bitmap[1];
3485 /*
3486 * Process the label in the upcoming getfattr
3487 */
3488 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3489
0e574af1 3490 nfs_fattr_init(info->fattr);
7c513058 3491 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3492}
3493
3494static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3495 struct nfs_fsinfo *info)
3496{
3497 struct nfs4_exception exception = { };
3498 int err;
3499 do {
fb8a5ba8 3500 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3501 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3502 switch (err) {
3503 case 0:
3504 case -NFS4ERR_WRONGSEC:
05e9cfb4 3505 goto out;
fb8a5ba8
BS		 3506 default:
3507 err = nfs4_handle_exception(server, err, &exception);
3508 }
1da177e4 3509 } while (exception.retry);
05e9cfb4 3510out:
1da177e4
LT		 3511 return err;
3512}
3513
8f70e95f
BS		 3514static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3515 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3516{
c2190661
TM		 3517 struct rpc_auth_create_args auth_args = {
3518 .pseudoflavor = flavor,
3519 };
8f70e95f
BS		 3520 struct rpc_auth *auth;
3521 int ret;
3522
c2190661 3523 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3524 if (IS_ERR(auth)) {
75bc8821 3525 ret = -EACCES;
8f70e95f
BS		 3526 goto out;
3527 }
3528 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3529out:
3530 return ret;
3531}
3532
9a744ba3
CL		 3533/*
3534 * Retry pseudoroot lookup with various security flavors. We do this when:
3535 *
3536 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3537 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3538 *
3539 * Returns zero on success, or a negative NFS4ERR value, or a
3540 * negative errno value.
3541 */
801a16dc 3542static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3543 struct nfs_fsinfo *info)
1da177e4 3544{
9a744ba3
CL		 3545 /* Per 3530bis 15.33.5 */
3546 static const rpc_authflavor_t flav_array[] = {
3547 RPC_AUTH_GSS_KRB5P,
3548 RPC_AUTH_GSS_KRB5I,
3549 RPC_AUTH_GSS_KRB5,
c4eafe11 3550 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3551 RPC_AUTH_NULL,
3552 };
3553 int status = -EPERM;
3554 size_t i;
6a1a1e34 3555
4d4b69dd
WAA		 3556 if (server->auth_info.flavor_len > 0) {
3557 /* try each flavor specified by user */
3558 for (i = 0; i < server->auth_info.flavor_len; i++) {
3559 status = nfs4_lookup_root_sec(server, fhandle, info,
3560 server->auth_info.flavors[i]);
3561 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3562 continue;
3563 break;
3564 }
3565 } else {
3566 /* no flavors specified by user, try default list */
3567 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3568 status = nfs4_lookup_root_sec(server, fhandle, info,
3569 flav_array[i]);
3570 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3571 continue;
3572 break;
3573 }
8f70e95f 3574 }
9a744ba3 3575
fb8a5ba8
BS		 3576 /*
3577 * -EACCESS could mean that the user doesn't have correct permissions
3578 * to access the mount. It could also mean that we tried to mount
3579 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3580 * existing mount programs don't handle -EACCES very well so it should
3581 * be mapped to -EPERM instead.
3582 */
3583 if (status == -EACCES)
3584 status = -EPERM;
801a16dc
BS		 3585 return status;
3586}
3587
2ed4b95b
CL		 3588/**
3589 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3590 * @server: initialized nfs_server handle
3591 * @fhandle: we fill in the pseudo-fs root file handle
3592 * @info: we fill in an FSINFO struct
5e6b1990 3593 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3594 *
3595 * Returns zero on success, or a negative errno.
801a16dc 3596 */
3028eb2b 3597int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3598 struct nfs_fsinfo *info,
3599 bool auth_probe)
801a16dc 3600{
c7757074 3601 int status = 0;
2ed4b95b 3602
c7757074 3603 if (!auth_probe)
5e6b1990 3604 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3605
3606 if (auth_probe || status == NFS4ERR_WRONGSEC)
698c937b
TM		 3607 status = server->nfs_client->cl_mvops->find_root_sec(server,
3608 fhandle, info);
2ed4b95b 3609
1da177e4
LT		 3610 if (status == 0)
3611 status = nfs4_server_capabilities(server, fhandle);
3612 if (status == 0)
3613 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3614
c12e87f4 3615 return nfs4_map_errors(status);
1da177e4
LT		 3616}
3617
bae36241
BS		 3618static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3619 struct nfs_fsinfo *info)
3620{
3621 int error;
3622 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3623 struct nfs4_label *label = NULL;
bae36241
BS		 3624
3625 error = nfs4_server_capabilities(server, mntfh);
3626 if (error < 0) {
3627 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3628 return error;
3629 }
3630
14c43f76
DQ		 3631 label = nfs4_label_alloc(server, GFP_KERNEL);
3632 if (IS_ERR(label))
3633 return PTR_ERR(label);
3634
1775fd3e 3635 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3636 if (error < 0) {
3637 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3638 goto err_free_label;
bae36241
BS		 3639 }
3640
3641 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3642 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3643 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3644
14c43f76
DQ		 3645err_free_label:
3646 nfs4_label_free(label);
3647
bae36241
BS		 3648 return error;
3649}
3650
6b97fd3d
MN		 3651/*
3652 * Get locations and (maybe) other attributes of a referral.
3653 * Note that we'll actually follow the referral later when
3654 * we detect fsid mismatch in inode revalidation
3655 */
f05d147f
BS		 3656static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3657 const struct qstr *name, struct nfs_fattr *fattr,
3658 struct nfs_fh *fhandle)
6b97fd3d
MN		 3659{
3660 int status = -ENOMEM;
3661 struct page *page = NULL;
3662 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3663
3664 page = alloc_page(GFP_KERNEL);
3665 if (page == NULL)
3666 goto out;
3667 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3668 if (locations == NULL)
3669 goto out;
3670
f05d147f 3671 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3672 if (status != 0)
3673 goto out;
519ae255
CL		 3674
3675 /*
3676 * If the fsid didn't change, this is a migration event, not a
3677 * referral. Cause us to drop into the exception handler, which
3678 * will kick off migration recovery.
3679 */
6b97fd3d 3680 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3681 dprintk("%s: server did not return a different fsid for"
3682 " a referral at %s\n", __func__, name->name);
519ae255 3683 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3684 goto out;
3685 }
533eb461
AA		 3686 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3687 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3688
533eb461 3689 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3690 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3691 memset(fhandle, 0, sizeof(struct nfs_fh));
3692out:
3693 if (page)
3694 __free_page(page);
5d7ca35a 3695 kfree(locations);
6b97fd3d
MN		 3696 return status;
3697}
3698
1775fd3e
DQ		 3699static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3700 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3701{
3702 struct nfs4_getattr_arg args = {
3703 .fh = fhandle,
3704 .bitmask = server->attr_bitmask,
3705 };
3706 struct nfs4_getattr_res res = {
3707 .fattr = fattr,
1775fd3e 3708 .label = label,
1da177e4
LT		 3709 .server = server,
3710 };
3711 struct rpc_message msg = {
3712 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3713 .rpc_argp = &args,
3714 .rpc_resp = &res,
3715 };
aa9c2669
DQ		 3716
3717 args.bitmask = nfs4_bitmask(server, label);
3718
0e574af1 3719 nfs_fattr_init(fattr);
7c513058 3720 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3721}
3722
1775fd3e
DQ		 3723static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3724 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3725{
3726 struct nfs4_exception exception = { };
3727 int err;
3728 do {
b5f875a9
TM		 3729 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3730 trace_nfs4_getattr(server, fhandle, fattr, err);
3731 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3732 &exception);
3733 } while (exception.retry);
3734 return err;
3735}
3736
3737/*
3738 * The file is not closed if it is opened due to the a request to change
3739 * the size of the file. The open call will not be needed once the
3740 * VFS layer lookup-intents are implemented.
3741 *
3742 * Close is called when the inode is destroyed.
3743 * If we haven't opened the file for O_WRONLY, we
3744 * need to in the size_change case to obtain a stateid.
3745 *
3746 * Got race?
3747 * Because OPEN is always done by name in nfsv4, it is
3748 * possible that we opened a different file by the same
3749 * name. We can recognize this race condition, but we
3750 * can't do anything about it besides returning an error.
3751 *
3752 * This will be fixed with VFS changes (lookup-intent).
3753 */
3754static int
3755nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3756 struct iattr *sattr)
3757{
2b0143b5 3758 struct inode *inode = d_inode(dentry);
659bfcd6 3759 struct rpc_cred *cred = NULL;
29b59f94 3760 struct nfs_open_context *ctx = NULL;
14c43f76 3761 struct nfs4_label *label = NULL;
1da177e4
LT		 3762 int status;
3763
88ac815c
PT		 3764 if (pnfs_ld_layoutret_on_setattr(inode) &&
3765 sattr->ia_valid & ATTR_SIZE &&
3766 sattr->ia_size < i_size_read(inode))
24028672 3767 pnfs_commit_and_return_layout(inode);
8a1636c4 3768
0e574af1 3769 nfs_fattr_init(fattr);
1da177e4 3770
2669940d
AA		 3771 /* Deal with open(O_TRUNC) */
3772 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3773 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3774
3775 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3776 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3777 return 0;
3778
d530838b 3779 /* Search for an existing open(O_WRITE) file */
659bfcd6 3780 if (sattr->ia_valid & ATTR_FILE) {
659bfcd6
TM		 3781
3782 ctx = nfs_file_open_context(sattr->ia_file);
29b59f94 3783 if (ctx)
504e5189 3784 cred = ctx->cred;
659bfcd6 3785 }
08e9eac4 3786
14c43f76
DQ		 3787 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3788 if (IS_ERR(label))
3789 return PTR_ERR(label);
3790
29b59f94 3791 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label);
aa9c2669 3792 if (status == 0) {
f044636d 3793 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3794 nfs_setsecurity(inode, fattr, label);
3795 }
14c43f76 3796 nfs4_label_free(label);
1da177e4
LT		 3797 return status;
3798}
3799
0c2e53f1
TM		 3800static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3801 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3802 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3803{
0c2e53f1 3804 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3805 int status;
3806 struct nfs4_lookup_arg args = {
3807 .bitmask = server->attr_bitmask,
0c2e53f1 3808 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3809 .name = name,
3810 };
3811 struct nfs4_lookup_res res = {
3812 .server = server,
3813 .fattr = fattr,
aa9c2669 3814 .label = label,
2b3de441
DH		 3815 .fh = fhandle,
3816 };
3817 struct rpc_message msg = {
3818 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3819 .rpc_argp = &args,
3820 .rpc_resp = &res,
3821 };
3822
aa9c2669
DQ		 3823 args.bitmask = nfs4_bitmask(server, label);
3824
2b3de441
DH		 3825 nfs_fattr_init(fattr);
3826
1da177e4 3827 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3828 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3829 dprintk("NFS reply lookup: %d\n", status);
3830 return status;
3831}
3832
72de53ec 3833static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3834{
7ebb9315 3835 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3836 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3837 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3838 fattr->nlink = 2;
3839}
3840
72de53ec 3841static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
beffb8fe 3842 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3843 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3844{
3845 struct nfs4_exception exception = { };
72de53ec 3846 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3847 int err;
3848 do {
1775fd3e 3849 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3850 trace_nfs4_lookup(dir, name, err);
72de53ec 3851 switch (err) {
08ef7bd3 3852 case -NFS4ERR_BADNAME:
72de53ec
BS		 3853 err = -ENOENT;
3854 goto out;
0c2e53f1 3855 case -NFS4ERR_MOVED:
f05d147f 3856 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3857 if (err == -NFS4ERR_MOVED)
3858 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3859 goto out;
0c2e53f1 3860 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3861 err = -EPERM;
3862 if (client != *clnt)
3863 goto out;
66b06860 3864 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3865 if (IS_ERR(client))
3866 return PTR_ERR(client);
3867
3868 exception.retry = 1;
3869 break;
3870 default:
3871 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3872 }
1da177e4 3873 } while (exception.retry);
72de53ec
BS		 3874
3875out:
3876 if (err == 0)
3877 *clnt = client;
3878 else if (client != *clnt)
3879 rpc_shutdown_client(client);
3880
1da177e4
LT		 3881 return err;
3882}
3883
beffb8fe 3884static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1775fd3e
DQ		 3885 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3886 struct nfs4_label *label)
72de53ec
BS		 3887{
3888 int status;
3889 struct rpc_clnt *client = NFS_CLIENT(dir);
3890
1775fd3e 3891 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3892 if (client != NFS_CLIENT(dir)) {
3893 rpc_shutdown_client(client);
3894 nfs_fixup_secinfo_attributes(fattr);
3895 }
3896 return status;
3897}
3898
f05d147f 3899struct rpc_clnt *
beffb8fe 3900nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name,
f05d147f
BS		 3901 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3902{
b72888cb 3903 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3904 int status;
f05d147f 3905
1775fd3e 3906 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3907 if (status < 0)
f05d147f 3908 return ERR_PTR(status);
b72888cb 3909 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3910}
3911
1da177e4
LT		 3912static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3913{
76b32999 3914 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3915 struct nfs4_accessargs args = {
3916 .fh = NFS_FH(inode),
a4980e78 3917 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3918 };
3919 struct nfs4_accessres res = {
3920 .server = server,
1da177e4 3921 };
1da177e4
LT		 3922 struct rpc_message msg = {
3923 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3924 .rpc_argp = &args,
3925 .rpc_resp = &res,
3926 .rpc_cred = entry->cred,
3927 };
3928 int mode = entry->mask;
aa9c2669 3929 int status = 0;
1da177e4
LT		 3930
3931 /*
3932 * Determine which access bits we want to ask for...
3933 */
3934 if (mode & MAY_READ)
3935 args.access |= NFS4_ACCESS_READ;
3936 if (S_ISDIR(inode->i_mode)) {
3937 if (mode & MAY_WRITE)
3938 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3939 if (mode & MAY_EXEC)
3940 args.access |= NFS4_ACCESS_LOOKUP;
3941 } else {
3942 if (mode & MAY_WRITE)
3943 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3944 if (mode & MAY_EXEC)
3945 args.access |= NFS4_ACCESS_EXECUTE;
3946 }
c407d41a
TM		 3947
3948 res.fattr = nfs_alloc_fattr();
3949 if (res.fattr == NULL)
3950 return -ENOMEM;
3951
7c513058 3952 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3953 if (!status) {
6168f62c 3954 nfs_access_set_mask(entry, res.access);
c407d41a 3955 nfs_refresh_inode(inode, res.fattr);
1da177e4 3956 }
c407d41a 3957 nfs_free_fattr(res.fattr);
1da177e4
LT		 3958 return status;
3959}
3960
3961static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3962{
3963 struct nfs4_exception exception = { };
3964 int err;
3965 do {
c1578b76
TM		 3966 err = _nfs4_proc_access(inode, entry);
3967 trace_nfs4_access(inode, err);
3968 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3969 &exception);
3970 } while (exception.retry);
3971 return err;
3972}
3973
3974/*
3975 * TODO: For the time being, we don't try to get any attributes
3976 * along with any of the zero-copy operations READ, READDIR,
3977 * READLINK, WRITE.
3978 *
3979 * In the case of the first three, we want to put the GETATTR
3980 * after the read-type operation -- this is because it is hard
3981 * to predict the length of a GETATTR response in v4, and thus
3982 * align the READ data correctly. This means that the GETATTR
3983 * may end up partially falling into the page cache, and we should
3984 * shift it into the 'tail' of the xdr_buf before processing.
3985 * To do this efficiently, we need to know the total length
3986 * of data received, which doesn't seem to be available outside
3987 * of the RPC layer.
3988 *
3989 * In the case of WRITE, we also want to put the GETATTR after
3990 * the operation -- in this case because we want to make sure
140150db 3991 * we get the post-operation mtime and size.
1da177e4
LT		 3992 *
3993 * Both of these changes to the XDR layer would in fact be quite
3994 * minor, but I decided to leave them for a subsequent patch.
3995 */
3996static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3997 unsigned int pgbase, unsigned int pglen)
3998{
3999 struct nfs4_readlink args = {
4000 .fh = NFS_FH(inode),
4001 .pgbase = pgbase,
4002 .pglen = pglen,
4003 .pages = &page,
4004 };
f50c7000 4005 struct nfs4_readlink_res res;
1da177e4
LT		 4006 struct rpc_message msg = {
4007 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
4008 .rpc_argp = &args,
f50c7000 4009 .rpc_resp = &res,
1da177e4
LT		 4010 };
4011
7c513058 4012 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4013}
4014
4015static int nfs4_proc_readlink(struct inode *inode, struct page *page,
4016 unsigned int pgbase, unsigned int pglen)
4017{
4018 struct nfs4_exception exception = { };
4019 int err;
4020 do {
c1578b76
TM		 4021 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
4022 trace_nfs4_readlink(inode, err);
4023 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 4024 &exception);
4025 } while (exception.retry);
4026 return err;
4027}
4028
1da177e4 4029/*
8867fe58 4030 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 4031 */
1da177e4
LT		 4032static int
4033nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 4034 int flags)
1da177e4 4035{
dff25ddb 4036 struct nfs_server *server = NFS_SERVER(dir);
aa9c2669 4037 struct nfs4_label l, *ilabel = NULL;
8867fe58 4038 struct nfs_open_context *ctx;
1da177e4 4039 struct nfs4_state *state;
1da177e4
LT		 4040 int status = 0;
4041
532d4def 4042 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL);
8867fe58
MS		 4043 if (IS_ERR(ctx))
4044 return PTR_ERR(ctx);
4045
aa9c2669
DQ		 4046 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
4047
dff25ddb
AG		 4048 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4049 sattr->ia_mode &= ~current_umask();
c5c3fb5f 4050 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 4051 if (IS_ERR(state)) {
4052 status = PTR_ERR(state);
c0204fd2 4053 goto out;
1da177e4 4054 }
1da177e4 4055out:
aa9c2669 4056 nfs4_label_release_security(ilabel);
8867fe58 4057 put_nfs_open_context(ctx);
1da177e4
LT		 4058 return status;
4059}
4060
beffb8fe 4061static int _nfs4_proc_remove(struct inode *dir, const struct qstr *name)
1da177e4 4062{
16e42959 4063 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 4064 struct nfs_removeargs args = {
1da177e4 4065 .fh = NFS_FH(dir),
26fe5750 4066 .name = *name,
16e42959 4067 };
4fdc17b2 4068 struct nfs_removeres res = {
16e42959 4069 .server = server,
1da177e4 4070 };
1da177e4 4071 struct rpc_message msg = {
4fdc17b2
TM		 4072 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
4073 .rpc_argp = &args,
4074 .rpc_resp = &res,
1da177e4 4075 };
778d2817 4076 int status;
1da177e4 4077
7c513058 4078 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 4079 if (status == 0)
16e42959 4080 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 4081 return status;
4082}
4083
beffb8fe 4084static int nfs4_proc_remove(struct inode *dir, const struct qstr *name)
1da177e4
LT		 4085{
4086 struct nfs4_exception exception = { };
4087 int err;
4088 do {
078ea3df
TM		 4089 err = _nfs4_proc_remove(dir, name);
4090 trace_nfs4_remove(dir, name, err);
4091 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4092 &exception);
4093 } while (exception.retry);
4094 return err;
4095}
4096
e4eff1a6 4097static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 4098{
e4eff1a6
TM		 4099 struct nfs_server *server = NFS_SERVER(dir);
4100 struct nfs_removeargs *args = msg->rpc_argp;
4101 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 4102
e4eff1a6 4103 res->server = server;
1da177e4 4104 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 4105 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 4106
4107 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 4108}
4109
34e137cc
BS		 4110static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
4111{
884be175 4112 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb),
d9afbd1b
TM		 4113 &data->args.seq_args,
4114 &data->res.seq_res,
4115 task);
1da177e4
LT		 4116}
4117
e4eff1a6 4118static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 4119{
078ea3df
TM		 4120 struct nfs_unlinkdata *data = task->tk_calldata;
4121 struct nfs_removeres *res = &data->res;
e4eff1a6 4122
14516c3a
TM		 4123 if (!nfs4_sequence_done(task, &res->seq_res))
4124 return 0;
8478eaa1
N		 4125 if (nfs4_async_handle_error(task, res->server, NULL,
4126 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 4127 return 0;
4128 update_changeattr(dir, &res->cinfo);
e4eff1a6 4129 return 1;
1da177e4
LT		 4130}
4131
d3d4152a
JL		 4132static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
4133{
4134 struct nfs_server *server = NFS_SERVER(dir);
4135 struct nfs_renameargs *arg = msg->rpc_argp;
4136 struct nfs_renameres *res = msg->rpc_resp;
4137
4138 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 4139 res->server = server;
a9c92d6b 4140 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 4141}
4142
c6bfa1a1
BS		 4143static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
4144{
d9afbd1b
TM		 4145 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
4146 &data->args.seq_args,
4147 &data->res.seq_res,
4148 task);
d3d4152a
JL		 4149}
4150
4151static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
4152 struct inode *new_dir)
4153{
fbc6f7c2
TM		 4154 struct nfs_renamedata *data = task->tk_calldata;
4155 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 4156
4157 if (!nfs4_sequence_done(task, &res->seq_res))
4158 return 0;
8478eaa1 4159 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 4160 return 0;
4161
4162 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 4163 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 4164 return 1;
4165}
4166
beffb8fe 4167static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4 4168{
91ba2eee 4169 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 4170 struct nfs4_link_arg arg = {
4171 .fh = NFS_FH(inode),
4172 .dir_fh = NFS_FH(dir),
4173 .name = name,
91ba2eee
TM		 4174 .bitmask = server->attr_bitmask,
4175 };
91ba2eee
TM		 4176 struct nfs4_link_res res = {
4177 .server = server,
1775fd3e 4178 .label = NULL,
1da177e4 4179 };
1da177e4
LT		 4180 struct rpc_message msg = {
4181 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
4182 .rpc_argp = &arg,
91ba2eee 4183 .rpc_resp = &res,
1da177e4 4184 };
136f2627
TM		 4185 int status = -ENOMEM;
4186
4187 res.fattr = nfs_alloc_fattr();
778d2817 4188 if (res.fattr == NULL)
136f2627 4189 goto out;
1da177e4 4190
14c43f76
DQ		 4191 res.label = nfs4_label_alloc(server, GFP_KERNEL);
4192 if (IS_ERR(res.label)) {
4193 status = PTR_ERR(res.label);
4194 goto out;
4195 }
aa9c2669 4196 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 4197
7c513058 4198 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 4199 if (!status) {
4200 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 4201 status = nfs_post_op_update_inode(inode, res.fattr);
4202 if (!status)
4203 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 4204 }
14c43f76
DQ		 4205
4206
4207 nfs4_label_free(res.label);
4208
136f2627 4209out:
136f2627 4210 nfs_free_fattr(res.fattr);
1da177e4
LT		 4211 return status;
4212}
4213
beffb8fe 4214static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4
LT		 4215{
4216 struct nfs4_exception exception = { };
4217 int err;
4218 do {
4219 err = nfs4_handle_exception(NFS_SERVER(inode),
4220 _nfs4_proc_link(inode, dir, name),
4221 &exception);
4222 } while (exception.retry);
4223 return err;
4224}
4225
57dc9a57
TM		 4226struct nfs4_createdata {
4227 struct rpc_message msg;
4228 struct nfs4_create_arg arg;
4229 struct nfs4_create_res res;
4230 struct nfs_fh fh;
4231 struct nfs_fattr fattr;
1775fd3e 4232 struct nfs4_label *label;
57dc9a57
TM		 4233};
4234
4235static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
beffb8fe 4236 const struct qstr *name, struct iattr *sattr, u32 ftype)
57dc9a57
TM		 4237{
4238 struct nfs4_createdata *data;
4239
4240 data = kzalloc(sizeof(*data), GFP_KERNEL);
4241 if (data != NULL) {
4242 struct nfs_server *server = NFS_SERVER(dir);
4243
14c43f76
DQ		 4244 data->label = nfs4_label_alloc(server, GFP_KERNEL);
4245 if (IS_ERR(data->label))
4246 goto out_free;
4247
57dc9a57
TM		 4248 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
4249 data->msg.rpc_argp = &data->arg;
4250 data->msg.rpc_resp = &data->res;
4251 data->arg.dir_fh = NFS_FH(dir);
4252 data->arg.server = server;
4253 data->arg.name = name;
4254 data->arg.attrs = sattr;
4255 data->arg.ftype = ftype;
aa9c2669 4256 data->arg.bitmask = nfs4_bitmask(server, data->label);
dff25ddb 4257 data->arg.umask = current_umask();
57dc9a57
TM		 4258 data->res.server = server;
4259 data->res.fh = &data->fh;
4260 data->res.fattr = &data->fattr;
1775fd3e 4261 data->res.label = data->label;
57dc9a57 4262 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 4263 }
4264 return data;
14c43f76
DQ		 4265out_free:
4266 kfree(data);
4267 return NULL;
57dc9a57
TM		 4268}
4269
4270static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
4271{
7c513058 4272 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 4273 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 4274 if (status == 0) {
4275 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 4276 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 4277 }
4278 return status;
4279}
4280
4281static void nfs4_free_createdata(struct nfs4_createdata *data)
4282{
14c43f76 4283 nfs4_label_free(data->label);
57dc9a57
TM		 4284 kfree(data);
4285}
4286
4f390c15 4287static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 4288 struct page *page, unsigned int len, struct iattr *sattr,
4289 struct nfs4_label *label)
1da177e4 4290{
57dc9a57
TM		 4291 struct nfs4_createdata *data;
4292 int status = -ENAMETOOLONG;
1da177e4 4293
94a6d753 4294 if (len > NFS4_MAXPATHLEN)
57dc9a57 4295 goto out;
4f390c15 4296
57dc9a57
TM		 4297 status = -ENOMEM;
4298 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
4299 if (data == NULL)
4300 goto out;
4301
4302 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
4303 data->arg.u.symlink.pages = &page;
4304 data->arg.u.symlink.len = len;
1775fd3e 4305 data->arg.label = label;
1da177e4 4306
57dc9a57
TM		 4307 status = nfs4_do_create(dir, dentry, data);
4308
4309 nfs4_free_createdata(data);
4310out:
1da177e4
LT		 4311 return status;
4312}
4313
4f390c15 4314static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 4315 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 4316{
4317 struct nfs4_exception exception = { };
aa9c2669 4318 struct nfs4_label l, *label = NULL;
1da177e4 4319 int err;
aa9c2669
DQ		 4320
4321 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4322
1da177e4 4323 do {
078ea3df
TM		 4324 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4325 trace_nfs4_symlink(dir, &dentry->d_name, err);
4326 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4327 &exception);
4328 } while (exception.retry);
aa9c2669
DQ		 4329
4330 nfs4_label_release_security(label);
1da177e4
LT		 4331 return err;
4332}
4333
4334static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 4335 struct iattr *sattr, struct nfs4_label *label)
1da177e4 4336{
57dc9a57
TM		 4337 struct nfs4_createdata *data;
4338 int status = -ENOMEM;
1da177e4 4339
57dc9a57
TM		 4340 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4341 if (data == NULL)
4342 goto out;
4343
1775fd3e 4344 data->arg.label = label;
57dc9a57
TM		 4345 status = nfs4_do_create(dir, dentry, data);
4346
4347 nfs4_free_createdata(data);
4348out:
1da177e4
LT		 4349 return status;
4350}
4351
4352static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4353 struct iattr *sattr)
4354{
dff25ddb 4355 struct nfs_server *server = NFS_SERVER(dir);
1da177e4 4356 struct nfs4_exception exception = { };
aa9c2669 4357 struct nfs4_label l, *label = NULL;
1da177e4 4358 int err;
a8a5da99 4359
aa9c2669
DQ		 4360 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4361
dff25ddb
AG		 4362 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4363 sattr->ia_mode &= ~current_umask();
1da177e4 4364 do {
078ea3df
TM		 4365 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4366 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4367 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4368 &exception);
4369 } while (exception.retry);
aa9c2669
DQ		 4370 nfs4_label_release_security(label);
4371
1da177e4
LT		 4372 return err;
4373}
4374
4375static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4376 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4 4377{
2b0143b5 4378 struct inode *dir = d_inode(dentry);
1da177e4
LT		 4379 struct nfs4_readdir_arg args = {
4380 .fh = NFS_FH(dir),
56e4ebf8 4381 .pages = pages,
1da177e4
LT		 4382 .pgbase = 0,
4383 .count = count,
2b0143b5 4384 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 4385 .plus = plus,
1da177e4
LT		 4386 };
4387 struct nfs4_readdir_res res;
4388 struct rpc_message msg = {
4389 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4390 .rpc_argp = &args,
4391 .rpc_resp = &res,
4392 .rpc_cred = cred,
4393 };
4394 int status;
4395
6de1472f
AV		 4396 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4397 dentry,
eadf4598 4398 (unsigned long long)cookie);
c3f52af3 4399 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 4400 res.pgbase = args.pgbase;
7c513058 4401 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 4402 if (status >= 0) {
c3f52af3 4403 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 4404 status += args.pgbase;
4405 }
c4812998
TM		 4406
4407 nfs_invalidate_atime(dir);
4408
3110ff80 4409 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 4410 return status;
4411}
4412
4413static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4414 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 4415{
4416 struct nfs4_exception exception = { };
4417 int err;
4418 do {
c1578b76
TM		 4419 err = _nfs4_proc_readdir(dentry, cred, cookie,
4420 pages, count, plus);
2b0143b5
DH		 4421 trace_nfs4_readdir(d_inode(dentry), err);
4422 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 4423 &exception);
4424 } while (exception.retry);
4425 return err;
4426}
4427
4428static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 4429 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 4430{
57dc9a57
TM		 4431 struct nfs4_createdata *data;
4432 int mode = sattr->ia_mode;
4433 int status = -ENOMEM;
1da177e4 4434
57dc9a57
TM		 4435 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4436 if (data == NULL)
4437 goto out;
4438
1da177e4 4439 if (S_ISFIFO(mode))
57dc9a57 4440 data->arg.ftype = NF4FIFO;
1da177e4 4441 else if (S_ISBLK(mode)) {
57dc9a57
TM		 4442 data->arg.ftype = NF4BLK;
4443 data->arg.u.device.specdata1 = MAJOR(rdev);
4444 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 4445 }
4446 else if (S_ISCHR(mode)) {
57dc9a57
TM		 4447 data->arg.ftype = NF4CHR;
4448 data->arg.u.device.specdata1 = MAJOR(rdev);
4449 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 4450 } else if (!S_ISSOCK(mode)) {
4451 status = -EINVAL;
4452 goto out_free;
1da177e4 4453 }
1775fd3e 4454
aa9c2669 4455 data->arg.label = label;
57dc9a57 4456 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 4457out_free:
57dc9a57
TM		 4458 nfs4_free_createdata(data);
4459out:
1da177e4
LT		 4460 return status;
4461}
4462
4463static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4464 struct iattr *sattr, dev_t rdev)
4465{
dff25ddb 4466 struct nfs_server *server = NFS_SERVER(dir);
1da177e4 4467 struct nfs4_exception exception = { };
aa9c2669 4468 struct nfs4_label l, *label = NULL;
1da177e4 4469 int err;
a8a5da99 4470
aa9c2669
DQ		 4471 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4472
dff25ddb
AG		 4473 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4474 sattr->ia_mode &= ~current_umask();
1da177e4 4475 do {
078ea3df
TM		 4476 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4477 trace_nfs4_mknod(dir, &dentry->d_name, err);
4478 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4479 &exception);
4480 } while (exception.retry);
aa9c2669
DQ		 4481
4482 nfs4_label_release_security(label);
4483
1da177e4
LT		 4484 return err;
4485}
4486
4487static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4488 struct nfs_fsstat *fsstat)
4489{
4490 struct nfs4_statfs_arg args = {
4491 .fh = fhandle,
4492 .bitmask = server->attr_bitmask,
4493 };
24ad148a
BH		 4494 struct nfs4_statfs_res res = {
4495 .fsstat = fsstat,
4496 };
1da177e4
LT		 4497 struct rpc_message msg = {
4498 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4499 .rpc_argp = &args,
24ad148a 4500 .rpc_resp = &res,
1da177e4
LT		 4501 };
4502
0e574af1 4503 nfs_fattr_init(fsstat->fattr);
7c513058 4504 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4505}
4506
4507static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4508{
4509 struct nfs4_exception exception = { };
4510 int err;
4511 do {
4512 err = nfs4_handle_exception(server,
4513 _nfs4_proc_statfs(server, fhandle, fsstat),
4514 &exception);
4515 } while (exception.retry);
4516 return err;
4517}
4518
4519static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4520 struct nfs_fsinfo *fsinfo)
4521{
4522 struct nfs4_fsinfo_arg args = {
4523 .fh = fhandle,
4524 .bitmask = server->attr_bitmask,
4525 };
3dda5e43
BH		 4526 struct nfs4_fsinfo_res res = {
4527 .fsinfo = fsinfo,
4528 };
1da177e4
LT		 4529 struct rpc_message msg = {
4530 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4531 .rpc_argp = &args,
3dda5e43 4532 .rpc_resp = &res,
1da177e4
LT		 4533 };
4534
7c513058 4535 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4536}
4537
4538static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4539{
4540 struct nfs4_exception exception = { };
83ca7f5a 4541 unsigned long now = jiffies;
1da177e4
LT		 4542 int err;
4543
4544 do {
83ca7f5a 4545 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4546 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a 4547 if (err == 0) {
fb10fb67
TM		 4548 nfs4_set_lease_period(server->nfs_client,
4549 fsinfo->lease_time * HZ,
4550 now);
83ca7f5a
CL		 4551 break;
4552 }
4553 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4554 } while (exception.retry);
4555 return err;
4556}
4557
4558static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4559{
e38eb650
BS		 4560 int error;
4561
0e574af1 4562 nfs_fattr_init(fsinfo->fattr);
e38eb650 4563 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4564 if (error == 0) {
4565 /* block layout checks this! */
4566 server->pnfs_blksize = fsinfo->blksize;
ca440c38 4567 set_pnfs_layoutdriver(server, fhandle, fsinfo);
dc182549 4568 }
e38eb650
BS		 4569
4570 return error;
1da177e4
LT		 4571}
4572
4573static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4574 struct nfs_pathconf *pathconf)
4575{
4576 struct nfs4_pathconf_arg args = {
4577 .fh = fhandle,
4578 .bitmask = server->attr_bitmask,
4579 };
d45b2989
BH		 4580 struct nfs4_pathconf_res res = {
4581 .pathconf = pathconf,
4582 };
1da177e4
LT		 4583 struct rpc_message msg = {
4584 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4585 .rpc_argp = &args,
d45b2989 4586 .rpc_resp = &res,
1da177e4
LT		 4587 };
4588
4589 /* None of the pathconf attributes are mandatory to implement */
4590 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4591 memset(pathconf, 0, sizeof(*pathconf));
4592 return 0;
4593 }
4594
0e574af1 4595 nfs_fattr_init(pathconf->fattr);
7c513058 4596 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4597}
4598
4599static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4600 struct nfs_pathconf *pathconf)
4601{
4602 struct nfs4_exception exception = { };
4603 int err;
4604
4605 do {
4606 err = nfs4_handle_exception(server,
4607 _nfs4_proc_pathconf(server, fhandle, pathconf),
4608 &exception);
4609 } while (exception.retry);
4610 return err;
4611}
4612
5521abfd 4613int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4614 const struct nfs_open_context *ctx,
4615 const struct nfs_lock_context *l_ctx,
4616 fmode_t fmode)
4617{
17393475 4618 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL);
9b206149
TM		 4619}
4620EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4621
5521abfd
TM		 4622static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4623 const struct nfs_open_context *ctx,
4624 const struct nfs_lock_context *l_ctx,
4625 fmode_t fmode)
4626{
4627 nfs4_stateid current_stateid;
4628
e1253be0
TM		 4629 /* If the current stateid represents a lost lock, then exit */
4630 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4631 return true;
5521abfd
TM		 4632 return nfs4_stateid_match(stateid, &current_stateid);
4633}
4634
4635static bool nfs4_error_stateid_expired(int err)
4636{
4637 switch (err) {
4638 case -NFS4ERR_DELEG_REVOKED:
4639 case -NFS4ERR_ADMIN_REVOKED:
4640 case -NFS4ERR_BAD_STATEID:
4641 case -NFS4ERR_STALE_STATEID:
4642 case -NFS4ERR_OLD_STATEID:
4643 case -NFS4ERR_OPENMODE:
4644 case -NFS4ERR_EXPIRED:
4645 return true;
4646 }
4647 return false;
4648}
4649
d45f60c6 4650static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4651{
d45f60c6 4652 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4653
d45f60c6 4654 trace_nfs4_read(hdr, task->tk_status);
9c27869d
TM		 4655 if (task->tk_status < 0) {
4656 struct nfs4_exception exception = {
4657 .inode = hdr->inode,
4658 .state = hdr->args.context->state,
4659 .stateid = &hdr->args.stateid,
4660 };
4661 task->tk_status = nfs4_async_handle_exception(task,
4662 server, task->tk_status, &exception);
4663 if (exception.retry) {
4664 rpc_restart_call_prepare(task);
4665 return -EAGAIN;
4666 }
1da177e4 4667 }
8850df99 4668
1da177e4 4669 if (task->tk_status > 0)
d45f60c6 4670 renew_lease(server, hdr->timestamp);
ec06c096 4671 return 0;
1da177e4
LT		 4672}
4673
5521abfd 4674static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4675 struct nfs_pgio_args *args)
5521abfd
TM		 4676{
4677
4678 if (!nfs4_error_stateid_expired(task->tk_status) ||
4679 nfs4_stateid_is_current(&args->stateid,
4680 args->context,
4681 args->lock_context,
4682 FMODE_READ))
4683 return false;
4684 rpc_restart_call_prepare(task);
4685 return true;
4686}
4687
d45f60c6 4688static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4689{
4690
4691 dprintk("--> %s\n", __func__);
4692
d45f60c6 4693 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4694 return -EAGAIN;
d45f60c6 4695 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4696 return -EAGAIN;
bfc505de
TM		 4697 if (task->tk_status > 0)
4698 nfs_invalidate_atime(hdr->inode);
d45f60c6
WAA		 4699 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4700 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4701}
4702
d45f60c6
WAA		 4703static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4704 struct rpc_message *msg)
1da177e4 4705{
d45f60c6 4706 hdr->timestamp = jiffies;
ca857cc1
TM		 4707 if (!hdr->pgio_done_cb)
4708 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4709 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4710 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4711}
4712
d45f60c6
WAA		 4713static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4714 struct nfs_pgio_header *hdr)
ea7c3303 4715{
d45f60c6
WAA		 4716 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4717 &hdr->args.seq_args,
4718 &hdr->res.seq_res,
9b206149 4719 task))
ef1820f9 4720 return 0;
d45f60c6
WAA		 4721 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4722 hdr->args.lock_context,
4723 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4724 return -EIO;
d45f60c6 4725 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4726 return -EIO;
4727 return 0;
1da177e4
LT		 4728}
4729
d45f60c6
WAA		 4730static int nfs4_write_done_cb(struct rpc_task *task,
4731 struct nfs_pgio_header *hdr)
1da177e4 4732{
d45f60c6 4733 struct inode *inode = hdr->inode;
8478eaa1 4734
d45f60c6 4735 trace_nfs4_write(hdr, task->tk_status);
9c27869d
TM		 4736 if (task->tk_status < 0) {
4737 struct nfs4_exception exception = {
4738 .inode = hdr->inode,
4739 .state = hdr->args.context->state,
4740 .stateid = &hdr->args.stateid,
4741 };
4742 task->tk_status = nfs4_async_handle_exception(task,
4743 NFS_SERVER(inode), task->tk_status,
4744 &exception);
4745 if (exception.retry) {
4746 rpc_restart_call_prepare(task);
4747 return -EAGAIN;
4748 }
1da177e4 4749 }
4f9838c7 4750 if (task->tk_status >= 0) {
d45f60c6 4751 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4752 nfs_writeback_update_inode(hdr);
4f9838c7 4753 }
788e7a89 4754 return 0;
1da177e4
LT		 4755}
4756
5521abfd 4757static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4758 struct nfs_pgio_args *args)
5521abfd
TM		 4759{
4760
4761 if (!nfs4_error_stateid_expired(task->tk_status) ||
4762 nfs4_stateid_is_current(&args->stateid,
4763 args->context,
4764 args->lock_context,
4765 FMODE_WRITE))
4766 return false;
4767 rpc_restart_call_prepare(task);
4768 return true;
4769}
4770
d45f60c6 4771static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4772{
d45f60c6 4773 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4774 return -EAGAIN;
d45f60c6 4775 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4776 return -EAGAIN;
d45f60c6
WAA		 4777 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4778 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4779}
4780
5a37f851 4781static
d45f60c6 4782bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4783{
5a37f851 4784 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4785 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4786 return false;
4787 /* Otherwise, request attributes if and only if we don't hold
4788 * a delegation
4789 */
011e2a7f 4790 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4791}
a69aef14 4792
d45f60c6
WAA		 4793static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4794 struct rpc_message *msg)
1da177e4 4795{
d45f60c6 4796 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4797
d45f60c6
WAA		 4798 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4799 hdr->args.bitmask = NULL;
4800 hdr->res.fattr = NULL;
7ffd1064 4801 } else
d45f60c6 4802 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4803
d45f60c6
WAA		 4804 if (!hdr->pgio_done_cb)
4805 hdr->pgio_done_cb = nfs4_write_done_cb;
4806 hdr->res.server = server;
4807 hdr->timestamp = jiffies;
1da177e4 4808
bdc7f021 4809 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4810 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4811}
4812
0b7c0153 4813static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4814{
d9afbd1b
TM		 4815 nfs4_setup_sequence(NFS_SERVER(data->inode),
4816 &data->args.seq_args,
4817 &data->res.seq_res,
4818 task);
1da177e4
LT		 4819}
4820
0b7c0153 4821static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4822{
1da177e4 4823 struct inode *inode = data->inode;
14516c3a 4824
cc668ab3 4825 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4826 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4827 NULL, NULL) == -EAGAIN) {
d00c5d43 4828 rpc_restart_call_prepare(task);
788e7a89 4829 return -EAGAIN;
1da177e4 4830 }
788e7a89 4831 return 0;
1da177e4
LT		 4832}
4833
0b7c0153 4834static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4835{
4836 if (!nfs4_sequence_done(task, &data->res.seq_res))
4837 return -EAGAIN;
0b7c0153 4838 return data->commit_done_cb(task, data);
5f452431
FI		 4839}
4840
0b7c0153 4841static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4842{
788e7a89 4843 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4844
0b7c0153
FI		 4845 if (data->commit_done_cb == NULL)
4846 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4847 data->res.server = server;
bdc7f021 4848 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4849 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4850}
4851
9bc4e3ca
CL		 4852struct nfs4_renewdata {
4853 struct nfs_client *client;
4854 unsigned long timestamp;
4855};
4856
1da177e4
LT		 4857/*
4858 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4859 * standalone procedure for queueing an asynchronous RENEW.
4860 */
9bc4e3ca 4861static void nfs4_renew_release(void *calldata)
dc96aef9 4862{
9bc4e3ca
CL		 4863 struct nfs4_renewdata *data = calldata;
4864 struct nfs_client *clp = data->client;
dc96aef9 4865
0851de06
AB		 4866 if (atomic_read(&clp->cl_count) > 1)
4867 nfs4_schedule_state_renewal(clp);
4868 nfs_put_client(clp);
9bc4e3ca 4869 kfree(data);
dc96aef9
AB		 4870}
4871
9bc4e3ca 4872static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4873{
9bc4e3ca
CL		 4874 struct nfs4_renewdata *data = calldata;
4875 struct nfs_client *clp = data->client;
4876 unsigned long timestamp = data->timestamp;
1da177e4 4877
c6d01c6f 4878 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4879 switch (task->tk_status) {
4880 case 0:
4881 break;
4882 case -NFS4ERR_LEASE_MOVED:
4883 nfs4_schedule_lease_moved_recovery(clp);
4884 break;
4885 default:
95baa25c 4886 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4887 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4888 return;
4889 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4890 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4891 return;
4892 }
4893 nfs4_schedule_path_down_recovery(clp);
1da177e4 4894 }
452e9352 4895 do_renew_lease(clp, timestamp);
1da177e4
LT		 4896}
4897
963d8fe5
TM		 4898static const struct rpc_call_ops nfs4_renew_ops = {
4899 .rpc_call_done = nfs4_renew_done,
dc96aef9 4900 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4901};
4902
2f60ea6b 4903static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4904{
4905 struct rpc_message msg = {
4906 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4907 .rpc_argp = clp,
b4454fe1 4908 .rpc_cred = cred,
1da177e4 4909 };
9bc4e3ca 4910 struct nfs4_renewdata *data;
1da177e4 4911
2f60ea6b
TM		 4912 if (renew_flags == 0)
4913 return 0;
0851de06
AB		 4914 if (!atomic_inc_not_zero(&clp->cl_count))
4915 return -EIO;
b569ad34 4916 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4917 if (data == NULL)
4918 return -ENOMEM;
4919 data->client = clp;
4920 data->timestamp = jiffies;
bc7a05ca 4921 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4922 &nfs4_renew_ops, data);
1da177e4
LT		 4923}
4924
8534d4ec 4925static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4926{
4927 struct rpc_message msg = {
4928 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4929 .rpc_argp = clp,
b4454fe1 4930 .rpc_cred = cred,
1da177e4
LT		 4931 };
4932 unsigned long now = jiffies;
4933 int status;
4934
bc7a05ca 4935 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4936 if (status < 0)
4937 return status;
452e9352 4938 do_renew_lease(clp, now);
1da177e4
LT		 4939 return 0;
4940}
4941
aa1870af
BF		 4942static inline int nfs4_server_supports_acls(struct nfs_server *server)
4943{
7dd7d959 4944 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4945}
4946
21f498c2
TM		 4947/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4948 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4949 * the stack.
4950 */
21f498c2 4951#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4952
e9e3d724 4953static int buf_to_pages_noslab(const void *buf, size_t buflen,
8fbcf237 4954 struct page **pages)
e9e3d724
NH		 4955{
4956 struct page *newpage, **spages;
4957 int rc = 0;
4958 size_t len;
4959 spages = pages;
4960
4961 do {
21f498c2 4962 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4963 newpage = alloc_page(GFP_KERNEL);
4964
4965 if (newpage == NULL)
4966 goto unwind;
4967 memcpy(page_address(newpage), buf, len);
4968 buf += len;
4969 buflen -= len;
4970 *pages++ = newpage;
4971 rc++;
4972 } while (buflen != 0);
4973
4974 return rc;
4975
4976unwind:
4977 for(; rc > 0; rc--)
4978 __free_page(spages[rc-1]);
4979 return -ENOMEM;
4980}
4981
e50a1c2e
BF		 4982struct nfs4_cached_acl {
4983 int cached;
4984 size_t len;
3e9d4154 4985 char data[0];
e50a1c2e
BF		 4986};
4987
4988static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4989{
4990 struct nfs_inode *nfsi = NFS_I(inode);
4991
4992 spin_lock(&inode->i_lock);
4993 kfree(nfsi->nfs4_acl);
4994 nfsi->nfs4_acl = acl;
4995 spin_unlock(&inode->i_lock);
4996}
4997
4998static void nfs4_zap_acl_attr(struct inode *inode)
4999{
5000 nfs4_set_cached_acl(inode, NULL);
5001}
5002
5003static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
5004{
5005 struct nfs_inode *nfsi = NFS_I(inode);
5006 struct nfs4_cached_acl *acl;
5007 int ret = -ENOENT;
5008
5009 spin_lock(&inode->i_lock);
5010 acl = nfsi->nfs4_acl;
5011 if (acl == NULL)
5012 goto out;
5013 if (buf == NULL) /* user is just asking for length */
5014 goto out_len;
5015 if (acl->cached == 0)
5016 goto out;
5017 ret = -ERANGE; /* see getxattr(2) man page */
5018 if (acl->len > buflen)
5019 goto out;
5020 memcpy(buf, acl->data, acl->len);
5021out_len:
5022 ret = acl->len;
5023out:
5024 spin_unlock(&inode->i_lock);
5025 return ret;
5026}
5027
5794d21e 5028static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 5029{
5030 struct nfs4_cached_acl *acl;
b291f1b1 5031 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 5032
1f1ea6c2 5033 if (buflen <= PAGE_SIZE) {
b291f1b1 5034 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 5035 if (acl == NULL)
5036 goto out;
5037 acl->cached = 1;
5794d21e 5038 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 5039 } else {
5040 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
5041 if (acl == NULL)
5042 goto out;
5043 acl->cached = 0;
5044 }
5045 acl->len = acl_len;
5046out:
5047 nfs4_set_cached_acl(inode, acl);
5048}
5049
bf118a34
AA		 5050/*
5051 * The getxattr API returns the required buffer length when called with a
5052 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
5053 * the required buf. On a NULL buf, we send a page of data to the server
5054 * guessing that the ACL request can be serviced by a page. If so, we cache
5055 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
5056 * the cache. If not so, we throw away the page, and cache the required
5057 * length. The next getxattr call will then produce another round trip to
5058 * the server, this time with the input buf of the required size.
5059 */
16b4289c 5060static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 5061{
bf118a34 5062 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 5063 struct nfs_getaclargs args = {
5064 .fh = NFS_FH(inode),
5065 .acl_pages = pages,
5066 .acl_len = buflen,
5067 };
663c79b3
BH		 5068 struct nfs_getaclres res = {
5069 .acl_len = buflen,
5070 };
aa1870af
BF		 5071 struct rpc_message msg = {
5072 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
5073 .rpc_argp = &args,
663c79b3 5074 .rpc_resp = &res,
aa1870af 5075 };
21f498c2
TM		 5076 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
5077 int ret = -ENOMEM, i;
aa1870af 5078
bf118a34
AA		 5079 /* As long as we're doing a round trip to the server anyway,
5080 * let's be prepared for a page of acl data. */
5081 if (npages == 0)
5082 npages = 1;
21f498c2
TM		 5083 if (npages > ARRAY_SIZE(pages))
5084 return -ERANGE;
5a006899 5085
bf118a34
AA		 5086 for (i = 0; i < npages; i++) {
5087 pages[i] = alloc_page(GFP_KERNEL);
5088 if (!pages[i])
5089 goto out_free;
e50a1c2e 5090 }
5a006899
SP		 5091
5092 /* for decoding across pages */
5093 res.acl_scratch = alloc_page(GFP_KERNEL);
5094 if (!res.acl_scratch)
5095 goto out_free;
5096
bf118a34 5097 args.acl_len = npages * PAGE_SIZE;
5a006899 5098
de040bec 5099 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 5100 __func__, buf, buflen, npages, args.acl_len);
5101 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
5102 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 5103 if (ret)
5104 goto out_free;
bf118a34 5105
1f1ea6c2
TM		 5106 /* Handle the case where the passed-in buffer is too short */
5107 if (res.acl_flags & NFS4_ACL_TRUNC) {
5108 /* Did the user only issue a request for the acl length? */
5109 if (buf == NULL)
5110 goto out_ok;
e50a1c2e 5111 ret = -ERANGE;
1f1ea6c2 5112 goto out_free;
e50a1c2e 5113 }
1f1ea6c2 5114 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 5115 if (buf) {
5116 if (res.acl_len > buflen) {
5117 ret = -ERANGE;
5118 goto out_free;
5119 }
1f1ea6c2 5120 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 5121 }
1f1ea6c2
TM		 5122out_ok:
5123 ret = res.acl_len;
e50a1c2e 5124out_free:
bf118a34
AA		 5125 for (i = 0; i < npages; i++)
5126 if (pages[i])
5127 __free_page(pages[i]);
331818f1
TM		 5128 if (res.acl_scratch)
5129 __free_page(res.acl_scratch);
aa1870af
BF		 5130 return ret;
5131}
5132
16b4289c
TM		 5133static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5134{
5135 struct nfs4_exception exception = { };
5136 ssize_t ret;
5137 do {
5138 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 5139 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 5140 if (ret >= 0)
5141 break;
5142 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
5143 } while (exception.retry);
5144 return ret;
5145}
5146
e50a1c2e
BF		 5147static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
5148{
5149 struct nfs_server *server = NFS_SERVER(inode);
5150 int ret;
5151
5152 if (!nfs4_server_supports_acls(server))
5153 return -EOPNOTSUPP;
5154 ret = nfs_revalidate_inode(server, inode);
5155 if (ret < 0)
5156 return ret;
08a22b39
AK		 5157 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
5158 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 5159 ret = nfs4_read_cached_acl(inode, buf, buflen);
5160 if (ret != -ENOENT)
bf118a34
AA		 5161 /* -ENOENT is returned if there is no ACL or if there is an ACL
5162 * but no cached acl data, just the acl length */
e50a1c2e
BF		 5163 return ret;
5164 return nfs4_get_acl_uncached(inode, buf, buflen);
5165}
5166
16b4289c 5167static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 5168{
5169 struct nfs_server *server = NFS_SERVER(inode);
5170 struct page *pages[NFS4ACL_MAXPAGES];
5171 struct nfs_setaclargs arg = {
5172 .fh = NFS_FH(inode),
5173 .acl_pages = pages,
5174 .acl_len = buflen,
5175 };
73c403a9 5176 struct nfs_setaclres res;
4b580ee3
BF		 5177 struct rpc_message msg = {
5178 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
5179 .rpc_argp = &arg,
73c403a9 5180 .rpc_resp = &res,
4b580ee3 5181 };
21f498c2 5182 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 5183 int ret, i;
4b580ee3
BF		 5184
5185 if (!nfs4_server_supports_acls(server))
5186 return -EOPNOTSUPP;
21f498c2
TM		 5187 if (npages > ARRAY_SIZE(pages))
5188 return -ERANGE;
8fbcf237 5189 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
e9e3d724
NH		 5190 if (i < 0)
5191 return i;
57ec14c5 5192 nfs4_inode_return_delegation(inode);
7c513058 5193 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 5194
5195 /*
5196 * Free each page after tx, so the only ref left is
5197 * held by the network stack
5198 */
5199 for (; i > 0; i--)
5200 put_page(pages[i-1]);
5201
08a22b39
AK		 5202 /*
5203 * Acl update can result in inode attribute update.
5204 * so mark the attribute cache invalid.
5205 */
5206 spin_lock(&inode->i_lock);
5207 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
5208 spin_unlock(&inode->i_lock);
f41f7418
TM		 5209 nfs_access_zap_cache(inode);
5210 nfs_zap_acl_cache(inode);
4b580ee3
BF		 5211 return ret;
5212}
5213
16b4289c
TM		 5214static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5215{
5216 struct nfs4_exception exception = { };
5217 int err;
5218 do {
c1578b76
TM		 5219 err = __nfs4_proc_set_acl(inode, buf, buflen);
5220 trace_nfs4_set_acl(inode, err);
5221 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 5222 &exception);
5223 } while (exception.retry);
5224 return err;
5225}
5226
aa9c2669
DQ		 5227#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5228static int _nfs4_get_security_label(struct inode *inode, void *buf,
5229 size_t buflen)
5230{
5231 struct nfs_server *server = NFS_SERVER(inode);
5232 struct nfs_fattr fattr;
5233 struct nfs4_label label = {0, 0, buflen, buf};
5234
5235 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 5236 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 5237 .fh = NFS_FH(inode),
5238 .bitmask = bitmask,
5239 };
5240 struct nfs4_getattr_res res = {
5241 .fattr = &fattr,
5242 .label = &label,
5243 .server = server,
5244 };
5245 struct rpc_message msg = {
5246 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 5247 .rpc_argp = &arg,
aa9c2669
DQ		 5248 .rpc_resp = &res,
5249 };
5250 int ret;
5251
5252 nfs_fattr_init(&fattr);
5253
fcb63a9b 5254 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 5255 if (ret)
5256 return ret;
5257 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
5258 return -ENOENT;
5259 if (buflen < label.len)
5260 return -ERANGE;
5261 return 0;
5262}
5263
5264static int nfs4_get_security_label(struct inode *inode, void *buf,
5265 size_t buflen)
5266{
5267 struct nfs4_exception exception = { };
5268 int err;
5269
5270 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5271 return -EOPNOTSUPP;
5272
5273 do {
c1578b76
TM		 5274 err = _nfs4_get_security_label(inode, buf, buflen);
5275 trace_nfs4_get_security_label(inode, err);
5276 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5277 &exception);
5278 } while (exception.retry);
5279 return err;
5280}
5281
5282static int _nfs4_do_set_security_label(struct inode *inode,
5283 struct nfs4_label *ilabel,
5284 struct nfs_fattr *fattr,
5285 struct nfs4_label *olabel)
5286{
5287
5288 struct iattr sattr = {0};
5289 struct nfs_server *server = NFS_SERVER(inode);
5290 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 5291 struct nfs_setattrargs arg = {
aa9c2669
DQ		 5292 .fh = NFS_FH(inode),
5293 .iap = &sattr,
5294 .server = server,
5295 .bitmask = bitmask,
5296 .label = ilabel,
5297 };
5298 struct nfs_setattrres res = {
5299 .fattr = fattr,
5300 .label = olabel,
5301 .server = server,
5302 };
5303 struct rpc_message msg = {
5304 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 5305 .rpc_argp = &arg,
aa9c2669
DQ		 5306 .rpc_resp = &res,
5307 };
5308 int status;
5309
12207f69 5310 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 5311
12207f69 5312 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 5313 if (status)
5314 dprintk("%s failed: %d\n", __func__, status);
5315
5316 return status;
5317}
5318
5319static int nfs4_do_set_security_label(struct inode *inode,
5320 struct nfs4_label *ilabel,
5321 struct nfs_fattr *fattr,
5322 struct nfs4_label *olabel)
5323{
5324 struct nfs4_exception exception = { };
5325 int err;
5326
5327 do {
c1578b76
TM		 5328 err = _nfs4_do_set_security_label(inode, ilabel,
5329 fattr, olabel);
5330 trace_nfs4_set_security_label(inode, err);
5331 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5332 &exception);
5333 } while (exception.retry);
5334 return err;
5335}
5336
5337static int
59301226 5338nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
aa9c2669
DQ		 5339{
5340 struct nfs4_label ilabel, *olabel = NULL;
5341 struct nfs_fattr fattr;
5342 struct rpc_cred *cred;
aa9c2669
DQ		 5343 int status;
5344
5345 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5346 return -EOPNOTSUPP;
5347
5348 nfs_fattr_init(&fattr);
5349
5350 ilabel.pi = 0;
5351 ilabel.lfs = 0;
5352 ilabel.label = (char *)buf;
5353 ilabel.len = buflen;
5354
5355 cred = rpc_lookup_cred();
5356 if (IS_ERR(cred))
5357 return PTR_ERR(cred);
5358
5359 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5360 if (IS_ERR(olabel)) {
5361 status = -PTR_ERR(olabel);
5362 goto out;
5363 }
5364
5365 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5366 if (status == 0)
5367 nfs_setsecurity(inode, &fattr, olabel);
5368
5369 nfs4_label_free(olabel);
5370out:
5371 put_rpccred(cred);
5372 return status;
5373}
5374#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5375
5376
f092075d
CL		 5377static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5378 nfs4_verifier *bootverf)
cd93710e
CL		 5379{
5380 __be32 verf[2];
5381
2c820d9a
CL		 5382 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5383 /* An impossible timestamp guarantees this value
5384 * will never match a generated boot time. */
2f86e091
DD		 5385 verf[0] = cpu_to_be32(U32_MAX);
5386 verf[1] = cpu_to_be32(U32_MAX);
2c820d9a 5387 } else {
f092075d 5388 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
2f86e091
DD		 5389 u64 ns = ktime_to_ns(nn->boot_time);
5390
5391 verf[0] = cpu_to_be32(ns >> 32);
5392 verf[1] = cpu_to_be32(ns);
2c820d9a 5393 }
cd93710e
CL		 5394 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5395}
5396
a3192688
JL		 5397static int
5398nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 5399{
a3192688
JL		 5400 size_t len;
5401 char *str;
e984a55a 5402
ceb3a16c 5403 if (clp->cl_owner_id != NULL)
a3192688 5404 return 0;
4a3e5779 5405
a3192688 5406 rcu_read_lock();
4a70316c 5407 len = 14 + strlen(clp->cl_ipaddr) + 1 +
a3192688
JL		 5408 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5409 1 +
5410 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5411 1;
5412 rcu_read_unlock();
5413
5414 if (len > NFS4_OPAQUE_LIMIT + 1)
5415 return -EINVAL;
5416
5417 /*
5418 * Since this string is allocated at mount time, and held until the
5419 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5420 * about a memory-reclaim deadlock.
5421 */
5422 str = kmalloc(len, GFP_KERNEL);
5423 if (!str)
5424 return -ENOMEM;
ceb3a16c 5425
e984a55a 5426 rcu_read_lock();
f2dd436e 5427 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
a3192688
JL		 5428 clp->cl_ipaddr,
5429 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5430 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5431 rcu_read_unlock();
a3192688 5432
a3192688
JL		 5433 clp->cl_owner_id = str;
5434 return 0;
e984a55a
CL		 5435}
5436
873e3851
JL		 5437static int
5438nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5439{
873e3851
JL		 5440 size_t len;
5441 char *str;
5442
5443 len = 10 + 10 + 1 + 10 + 1 +
5444 strlen(nfs4_client_id_uniquifier) + 1 +
5445 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5446
5447 if (len > NFS4_OPAQUE_LIMIT + 1)
5448 return -EINVAL;
5449
5450 /*
5451 * Since this string is allocated at mount time, and held until the
5452 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5453 * about a memory-reclaim deadlock.
5454 */
5455 str = kmalloc(len, GFP_KERNEL);
5456 if (!str)
5457 return -ENOMEM;
5458
f2dd436e 5459 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
873e3851
JL		 5460 clp->rpc_ops->version, clp->cl_minorversion,
5461 nfs4_client_id_uniquifier,
5462 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5463 clp->cl_owner_id = str;
5464 return 0;
5465}
5466
5467static int
5468nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5469{
873e3851
JL		 5470 size_t len;
5471 char *str;
ceb3a16c
TM		 5472
5473 if (clp->cl_owner_id != NULL)
873e3851 5474 return 0;
6f2ea7f2
CL		 5475
5476 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5477 return nfs4_init_uniquifier_client_string(clp);
5478
5479 len = 10 + 10 + 1 + 10 + 1 +
5480 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5481
5482 if (len > NFS4_OPAQUE_LIMIT + 1)
5483 return -EINVAL;
5484
5485 /*
5486 * Since this string is allocated at mount time, and held until the
5487 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5488 * about a memory-reclaim deadlock.
5489 */
5490 str = kmalloc(len, GFP_KERNEL);
5491 if (!str)
5492 return -ENOMEM;
5493
f2dd436e 5494 scnprintf(str, len, "Linux NFSv%u.%u %s",
873e3851
JL		 5495 clp->rpc_ops->version, clp->cl_minorversion,
5496 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5497 clp->cl_owner_id = str;
5498 return 0;
e984a55a
CL		 5499}
5500
706cb8db
CL		 5501/*
5502 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5503 * services. Advertise one based on the address family of the
5504 * clientaddr.
5505 */
5506static unsigned int
5507nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5508{
5509 if (strchr(clp->cl_ipaddr, ':') != NULL)
5510 return scnprintf(buf, len, "tcp6");
5511 else
5512 return scnprintf(buf, len, "tcp");
5513}
5514
f11b2a1c
JL		 5515static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5516{
5517 struct nfs4_setclientid *sc = calldata;
5518
5519 if (task->tk_status == 0)
5520 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5521}
5522
5523static const struct rpc_call_ops nfs4_setclientid_ops = {
5524 .rpc_call_done = nfs4_setclientid_done,
5525};
5526
6bbb4ae8
CL		 5527/**
5528 * nfs4_proc_setclientid - Negotiate client ID
5529 * @clp: state data structure
5530 * @program: RPC program for NFSv4 callback service
5531 * @port: IP port number for NFS4 callback service
5532 * @cred: RPC credential to use for this call
5533 * @res: where to place the result
5534 *
5535 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5536 */
bb8b27e5
TM		 5537int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5538 unsigned short port, struct rpc_cred *cred,
5539 struct nfs4_setclientid_res *res)
1da177e4
LT		 5540{
5541 nfs4_verifier sc_verifier;
5542 struct nfs4_setclientid setclientid = {
5543 .sc_verifier = &sc_verifier,
5544 .sc_prog = program,
3a6bb738 5545 .sc_clnt = clp,
1da177e4
LT		 5546 };
5547 struct rpc_message msg = {
5548 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5549 .rpc_argp = &setclientid,
bb8b27e5 5550 .rpc_resp = res,
286d7d6a 5551 .rpc_cred = cred,
1da177e4 5552 };
f11b2a1c
JL		 5553 struct rpc_task *task;
5554 struct rpc_task_setup task_setup_data = {
5555 .rpc_client = clp->cl_rpcclient,
5556 .rpc_message = &msg,
5557 .callback_ops = &nfs4_setclientid_ops,
5558 .callback_data = &setclientid,
5559 .flags = RPC_TASK_TIMEOUT,
5560 };
6bbb4ae8 5561 int status;
1da177e4 5562
de734831 5563 /* nfs_client_id4 */
f092075d 5564 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5565
5566 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5567 status = nfs4_init_uniform_client_string(clp);
5568 else
a3192688 5569 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5570
5571 if (status)
5572 goto out;
3a6bb738 5573
de734831 5574 /* cb_client4 */
706cb8db
CL		 5575 setclientid.sc_netid_len =
5576 nfs4_init_callback_netid(clp,
5577 setclientid.sc_netid,
5578 sizeof(setclientid.sc_netid));
de734831 5579 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5580 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5581 clp->cl_ipaddr, port >> 8, port & 255);
5582
3a6bb738 5583 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5584 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5585 clp->cl_owner_id);
f11b2a1c
JL		 5586 task = rpc_run_task(&task_setup_data);
5587 if (IS_ERR(task)) {
5588 status = PTR_ERR(task);
5589 goto out;
5590 }
5591 status = task->tk_status;
5592 if (setclientid.sc_cred) {
5593 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5594 put_rpccred(setclientid.sc_cred);
5595 }
5596 rpc_put_task(task);
5597out:
c6d01c6f 5598 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5599 dprintk("NFS reply setclientid: %d\n", status);
5600 return status;
1da177e4
LT		 5601}
5602
6bbb4ae8
CL		 5603/**
5604 * nfs4_proc_setclientid_confirm - Confirm client ID
5605 * @clp: state data structure
5606 * @res: result of a previous SETCLIENTID
5607 * @cred: RPC credential to use for this call
5608 *
5609 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5610 */
fd954ae1 5611int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5612 struct nfs4_setclientid_res *arg,
5613 struct rpc_cred *cred)
1da177e4 5614{
1da177e4
LT		 5615 struct rpc_message msg = {
5616 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5617 .rpc_argp = arg,
286d7d6a 5618 .rpc_cred = cred,
1da177e4 5619 };
1da177e4
LT		 5620 int status;
5621
6bbb4ae8
CL		 5622 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5623 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5624 clp->cl_clientid);
1bd714f2 5625 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5626 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5627 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5628 return status;
5629}
5630
fe650407
TM		 5631struct nfs4_delegreturndata {
5632 struct nfs4_delegreturnargs args;
fa178f29 5633 struct nfs4_delegreturnres res;
fe650407
TM		 5634 struct nfs_fh fh;
5635 nfs4_stateid stateid;
26e976a8 5636 unsigned long timestamp;
586f1c39
TM		 5637 struct {
5638 struct nfs4_layoutreturn_args arg;
5639 struct nfs4_layoutreturn_res res;
4d796d75 5640 struct nfs4_xdr_opaque_data ld_private;
586f1c39
TM		 5641 u32 roc_barrier;
5642 bool roc;
5643 } lr;
fa178f29 5644 struct nfs_fattr fattr;
fe650407 5645 int rpc_status;
039b756a 5646 struct inode *inode;
fe650407
TM		 5647};
5648
fe650407
TM		 5649static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5650{
5651 struct nfs4_delegreturndata *data = calldata;
938e1010 5652
14516c3a
TM		 5653 if (!nfs4_sequence_done(task, &data->res.seq_res))
5654 return;
938e1010 5655
ca8acf8d 5656 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
586f1c39
TM		 5657
5658 /* Handle Layoutreturn errors */
5659 if (data->args.lr_args && task->tk_status != 0) {
5660 switch(data->res.lr_ret) {
5661 default:
5662 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
5663 break;
5664 case 0:
5665 data->args.lr_args = NULL;
5666 data->res.lr_res = NULL;
5667 break;
5668 case -NFS4ERR_ADMIN_REVOKED:
5669 case -NFS4ERR_DELEG_REVOKED:
5670 case -NFS4ERR_EXPIRED:
5671 case -NFS4ERR_BAD_STATEID:
5672 case -NFS4ERR_OLD_STATEID:
5673 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
5674 case -NFS4ERR_WRONG_CRED:
5675 data->args.lr_args = NULL;
5676 data->res.lr_res = NULL;
5677 data->res.lr_ret = 0;
5678 rpc_restart_call_prepare(task);
5679 return;
5680 }
5681 }
5682
79708861 5683 switch (task->tk_status) {
79708861 5684 case 0:
fa178f29 5685 renew_lease(data->res.server, data->timestamp);
23ea44c2 5686 break;
c97cf606
TM		 5687 case -NFS4ERR_ADMIN_REVOKED:
5688 case -NFS4ERR_DELEG_REVOKED:
26d36301
TM		 5689 case -NFS4ERR_EXPIRED:
5690 nfs4_free_revoked_stateid(data->res.server,
5691 data->args.stateid,
5692 task->tk_msg.rpc_cred);
c97cf606
TM		 5693 case -NFS4ERR_BAD_STATEID:
5694 case -NFS4ERR_OLD_STATEID:
5695 case -NFS4ERR_STALE_STATEID:
c97cf606
TM		 5696 task->tk_status = 0;
5697 break;
8ac2b422
TM		 5698 case -NFS4ERR_ACCESS:
5699 if (data->args.bitmask) {
5700 data->args.bitmask = NULL;
5701 data->res.fattr = NULL;
5702 task->tk_status = 0;
5703 rpc_restart_call_prepare(task);
5704 return;
5705 }
79708861 5706 default:
8478eaa1
N		 5707 if (nfs4_async_handle_error(task, data->res.server,
5708 NULL, NULL) == -EAGAIN) {
d00c5d43 5709 rpc_restart_call_prepare(task);
79708861
RL		 5710 return;
5711 }
5712 }
5713 data->rpc_status = task->tk_status;
fe650407
TM		 5714}
5715
5716static void nfs4_delegreturn_release(void *calldata)
5717{
039b756a 5718 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5719 struct inode *inode = data->inode;
039b756a 5720
ea7c38fe 5721 if (inode) {
586f1c39 5722 if (data->lr.roc)
1c5bd76d
TM		 5723 pnfs_roc_release(&data->lr.arg, &data->lr.res,
5724 data->res.lr_ret);
0bc2c9b4 5725 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
ea7c38fe
TM		 5726 nfs_iput_and_deactive(inode);
5727 }
fe650407
TM		 5728 kfree(calldata);
5729}
5730
938e1010
AA		 5731static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5732{
5733 struct nfs4_delegreturndata *d_data;
5734
5735 d_data = (struct nfs4_delegreturndata *)data;
5736
1c5bd76d 5737 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task))
500d701f
PT		 5738 return;
5739
d9afbd1b
TM		 5740 nfs4_setup_sequence(d_data->res.server,
5741 &d_data->args.seq_args,
5742 &d_data->res.seq_res,
5743 task);
938e1010 5744}
938e1010 5745
c8d149f3 5746static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5747 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5748 .rpc_call_done = nfs4_delegreturn_done,
5749 .rpc_release = nfs4_delegreturn_release,
5750};
5751
e6f81075 5752static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5753{
5754 struct nfs4_delegreturndata *data;
fa178f29 5755 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5756 struct rpc_task *task;
5138fde0
TM		 5757 struct rpc_message msg = {
5758 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5759 .rpc_cred = cred,
5760 };
c970aa85
TM		 5761 struct rpc_task_setup task_setup_data = {
5762 .rpc_client = server->client,
5138fde0 5763 .rpc_message = &msg,
c970aa85
TM		 5764 .callback_ops = &nfs4_delegreturn_ops,
5765 .flags = RPC_TASK_ASYNC,
5766 };
e6f81075 5767 int status = 0;
fe650407 5768
8535b2be 5769 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5770 if (data == NULL)
5771 return -ENOMEM;
a9c92d6b 5772 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
99ade3c7
AE		 5773
5774 nfs4_state_protect(server->nfs_client,
5775 NFS_SP4_MACH_CRED_CLEANUP,
5776 &task_setup_data.rpc_client, &msg);
5777
fe650407
TM		 5778 data->args.fhandle = &data->fh;
5779 data->args.stateid = &data->stateid;
9e907fec 5780 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5781 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5782 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5783 data->res.fattr = &data->fattr;
5784 data->res.server = server;
586f1c39 5785 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
4d796d75 5786 data->lr.arg.ld_private = &data->lr.ld_private;
5138fde0 5787 nfs_fattr_init(data->res.fattr);
26e976a8 5788 data->timestamp = jiffies;
fe650407 5789 data->rpc_status = 0;
53e6fc86 5790 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, cred);
ea7c38fe 5791 data->inode = nfs_igrab_and_active(inode);
1c5bd76d 5792 if (data->inode) {
1c5bd76d
TM		 5793 if (data->lr.roc) {
5794 data->args.lr_args = &data->lr.arg;
5795 data->res.lr_res = &data->lr.res;
5796 }
53e6fc86
TM		 5797 } else if (data->lr.roc) {
5798 pnfs_roc_release(&data->lr.arg, &data->lr.res, 0);
5799 data->lr.roc = false;
1c5bd76d 5800 }
fe650407 5801
c970aa85 5802 task_setup_data.callback_data = data;
1174dd1f
TM		 5803 msg.rpc_argp = &data->args;
5804 msg.rpc_resp = &data->res;
c970aa85 5805 task = rpc_run_task(&task_setup_data);
7a1218a2 5806 if (IS_ERR(task))
fe650407 5807 return PTR_ERR(task);
e6f81075
TM		 5808 if (!issync)
5809 goto out;
fe650407 5810 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5811 if (status != 0)
5812 goto out;
5813 status = data->rpc_status;
e6f81075 5814out:
e6b3c4db 5815 rpc_put_task(task);
fe650407 5816 return status;
1da177e4
LT		 5817}
5818
e6f81075 5819int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5820{
5821 struct nfs_server *server = NFS_SERVER(inode);
5822 struct nfs4_exception exception = { };
5823 int err;
5824 do {
e6f81075 5825 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
48c9579a 5826 trace_nfs4_delegreturn(inode, stateid, err);
1da177e4
LT		 5827 switch (err) {
5828 case -NFS4ERR_STALE_STATEID:
5829 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5830 case 0:
5831 return 0;
5832 }
5833 err = nfs4_handle_exception(server, err, &exception);
5834 } while (exception.retry);
5835 return err;
5836}
5837
1da177e4
LT		 5838static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5839{
5840 struct inode *inode = state->inode;
5841 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5842 struct nfs_client *clp = server->nfs_client;
911d1aaf 5843 struct nfs_lockt_args arg = {
1da177e4 5844 .fh = NFS_FH(inode),
911d1aaf 5845 .fl = request,
1da177e4 5846 };
911d1aaf
TM		 5847 struct nfs_lockt_res res = {
5848 .denied = request,
1da177e4
LT		 5849 };
5850 struct rpc_message msg = {
5851 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5852 .rpc_argp = &arg,
5853 .rpc_resp = &res,
5854 .rpc_cred = state->owner->so_cred,
5855 };
1da177e4
LT		 5856 struct nfs4_lock_state *lsp;
5857 int status;
5858
911d1aaf 5859 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5860 status = nfs4_set_lock_state(state, request);
5861 if (status != 0)
5862 goto out;
5863 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5864 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5865 arg.lock_owner.s_dev = server->s_dev;
7c513058 5866 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5867 switch (status) {
5868 case 0:
5869 request->fl_type = F_UNLCK;
5870 break;
5871 case -NFS4ERR_DENIED:
5872 status = 0;
1da177e4 5873 }
70cc6487 5874 request->fl_ops->fl_release_private(request);
a6f951dd 5875 request->fl_ops = NULL;
8d0a8a9d 5876out:
1da177e4
LT		 5877 return status;
5878}
5879
5880static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5881{
5882 struct nfs4_exception exception = { };
5883 int err;
5884
5885 do {
d1b748a5
TM		 5886 err = _nfs4_proc_getlk(state, cmd, request);
5887 trace_nfs4_get_lock(request, state, cmd, err);
5888 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5889 &exception);
5890 } while (exception.retry);
5891 return err;
5892}
5893
faf5f49c 5894struct nfs4_unlockdata {
911d1aaf
TM		 5895 struct nfs_locku_args arg;
5896 struct nfs_locku_res res;
faf5f49c
TM		 5897 struct nfs4_lock_state *lsp;
5898 struct nfs_open_context *ctx;
911d1aaf 5899 struct file_lock fl;
516285eb 5900 struct nfs_server *server;
26e976a8 5901 unsigned long timestamp;
faf5f49c
TM		 5902};
5903
911d1aaf
TM		 5904static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5905 struct nfs_open_context *ctx,
5906 struct nfs4_lock_state *lsp,
5907 struct nfs_seqid *seqid)
5908{
5909 struct nfs4_unlockdata *p;
5910 struct inode *inode = lsp->ls_state->inode;
5911
8535b2be 5912 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5913 if (p == NULL)
5914 return NULL;
5915 p->arg.fh = NFS_FH(inode);
5916 p->arg.fl = &p->fl;
5917 p->arg.seqid = seqid;
c1d51931 5918 p->res.seqid = seqid;
911d1aaf
TM		 5919 p->lsp = lsp;
5920 atomic_inc(&lsp->ls_count);
5921 /* Ensure we don't close file until we're done freeing locks! */
5922 p->ctx = get_nfs_open_context(ctx);
5923 memcpy(&p->fl, fl, sizeof(p->fl));
5924 p->server = NFS_SERVER(inode);
5925 return p;
5926}
5927
06f814a3 5928static void nfs4_locku_release_calldata(void *data)
faf5f49c 5929{
963d8fe5 5930 struct nfs4_unlockdata *calldata = data;
911d1aaf 5931 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5932 nfs4_put_lock_state(calldata->lsp);
5933 put_nfs_open_context(calldata->ctx);
5934 kfree(calldata);
faf5f49c
TM		 5935}
5936
963d8fe5 5937static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5938{
963d8fe5 5939 struct nfs4_unlockdata *calldata = data;
faf5f49c 5940
14516c3a
TM		 5941 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5942 return;
faf5f49c
TM		 5943 switch (task->tk_status) {
5944 case 0:
26e976a8 5945 renew_lease(calldata->server, calldata->timestamp);
75575ddf 5946 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 5947 if (nfs4_update_lock_stateid(calldata->lsp,
5948 &calldata->res.stateid))
5949 break;
26d36301
TM		 5950 case -NFS4ERR_ADMIN_REVOKED:
5951 case -NFS4ERR_EXPIRED:
5952 nfs4_free_revoked_stateid(calldata->server,
5953 &calldata->arg.stateid,
5954 task->tk_msg.rpc_cred);
9e33bed5
TM		 5955 case -NFS4ERR_BAD_STATEID:
5956 case -NFS4ERR_OLD_STATEID:
faf5f49c 5957 case -NFS4ERR_STALE_STATEID:
425c1d4e
TM		 5958 if (!nfs4_stateid_match(&calldata->arg.stateid,
5959 &calldata->lsp->ls_stateid))
5960 rpc_restart_call_prepare(task);
faf5f49c
TM		 5961 break;
5962 default:
8478eaa1
N		 5963 if (nfs4_async_handle_error(task, calldata->server,
5964 NULL, NULL) == -EAGAIN)
d00c5d43 5965 rpc_restart_call_prepare(task);
faf5f49c 5966 }
2b1bc308 5967 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5968}
5969
4ce70ada 5970static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5971{
4ce70ada 5972 struct nfs4_unlockdata *calldata = data;
faf5f49c 5973
911d1aaf 5974 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5975 goto out_wait;
425c1d4e 5976 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5977 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5978 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5979 goto out_no_action;
faf5f49c 5980 }
26e976a8 5981 calldata->timestamp = jiffies;
035168ab 5982 if (nfs4_setup_sequence(calldata->server,
a893693c 5983 &calldata->arg.seq_args,
2240a9e2
TM		 5984 &calldata->res.seq_res,
5985 task) != 0)
5986 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5987 return;
5988out_no_action:
5989 task->tk_action = NULL;
5990out_wait:
5991 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5992}
5993
963d8fe5 5994static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5995 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5996 .rpc_call_done = nfs4_locku_done,
06f814a3 5997 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5998};
5999
a5d16a4d
TM		 6000static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
6001 struct nfs_open_context *ctx,
6002 struct nfs4_lock_state *lsp,
6003 struct nfs_seqid *seqid)
6004{
6005 struct nfs4_unlockdata *data;
5138fde0
TM		 6006 struct rpc_message msg = {
6007 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
6008 .rpc_cred = ctx->cred,
6009 };
c970aa85
TM		 6010 struct rpc_task_setup task_setup_data = {
6011 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 6012 .rpc_message = &msg,
c970aa85 6013 .callback_ops = &nfs4_locku_ops,
101070ca 6014 .workqueue = nfsiod_workqueue,
c970aa85
TM		 6015 .flags = RPC_TASK_ASYNC,
6016 };
a5d16a4d 6017
fa940720
WAA		 6018 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
6019 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
6020
137d6aca
FF		 6021 /* Ensure this is an unlock - when canceling a lock, the
6022 * canceled lock is passed in, and it won't be an unlock.
6023 */
6024 fl->fl_type = F_UNLCK;
6025
a5d16a4d
TM		 6026 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
6027 if (data == NULL) {
6028 nfs_free_seqid(seqid);
6029 return ERR_PTR(-ENOMEM);
6030 }
6031
a9c92d6b 6032 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 6033 msg.rpc_argp = &data->arg;
6034 msg.rpc_resp = &data->res;
c970aa85
TM		 6035 task_setup_data.callback_data = data;
6036 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 6037}
6038
faf5f49c
TM		 6039static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
6040{
65b62a29
TM		 6041 struct inode *inode = state->inode;
6042 struct nfs4_state_owner *sp = state->owner;
6043 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 6044 struct nfs_seqid *seqid;
1da177e4 6045 struct nfs4_lock_state *lsp;
06f814a3 6046 struct rpc_task *task;
b4019c0e 6047 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 6048 int status = 0;
536ff0f8 6049 unsigned char fl_flags = request->fl_flags;
faf5f49c 6050
8d0a8a9d 6051 status = nfs4_set_lock_state(state, request);
9b073574
TM		 6052 /* Unlock _before_ we do the RPC call */
6053 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 6054 /* Exclude nfs_delegation_claim_locks() */
6055 mutex_lock(&sp->so_delegreturn_mutex);
6056 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 6057 down_read(&nfsi->rwsem);
75575ddf 6058 if (locks_lock_inode_wait(inode, request) == -ENOENT) {
19e03c57 6059 up_read(&nfsi->rwsem);
65b62a29 6060 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 6061 goto out;
19e03c57
TM		 6062 }
6063 up_read(&nfsi->rwsem);
65b62a29 6064 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 6065 if (status != 0)
9b073574
TM		 6066 goto out;
6067 /* Is this a delegated lock? */
8d0a8a9d 6068 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 6069 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
6070 goto out;
b4019c0e
TM		 6071 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
6072 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 6073 status = -ENOMEM;
badc76dd 6074 if (IS_ERR(seqid))
9b073574 6075 goto out;
cd3758e3 6076 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 6077 status = PTR_ERR(task);
6078 if (IS_ERR(task))
9b073574 6079 goto out;
a5d16a4d 6080 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 6081 rpc_put_task(task);
9b073574 6082out:
536ff0f8 6083 request->fl_flags = fl_flags;
d1b748a5 6084 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 6085 return status;
6086}
6087
a5d16a4d
TM		 6088struct nfs4_lockdata {
6089 struct nfs_lock_args arg;
6090 struct nfs_lock_res res;
6091 struct nfs4_lock_state *lsp;
6092 struct nfs_open_context *ctx;
6093 struct file_lock fl;
26e976a8 6094 unsigned long timestamp;
a5d16a4d
TM		 6095 int rpc_status;
6096 int cancelled;
66179efe 6097 struct nfs_server *server;
a5d16a4d
TM		 6098};
6099
6100static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 6101 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
6102 gfp_t gfp_mask)
1da177e4 6103{
a5d16a4d
TM		 6104 struct nfs4_lockdata *p;
6105 struct inode *inode = lsp->ls_state->inode;
1da177e4 6106 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 6107 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 6108
8535b2be 6109 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 6110 if (p == NULL)
6111 return NULL;
6112
6113 p->arg.fh = NFS_FH(inode);
6114 p->arg.fl = &p->fl;
8535b2be 6115 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 6116 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 6117 goto out_free;
b4019c0e
TM		 6118 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
6119 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 6120 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 6121 goto out_free_seqid;
7539bbab 6122 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 6123 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 6124 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 6125 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 6126 p->lsp = lsp;
66179efe 6127 p->server = server;
a5d16a4d
TM		 6128 atomic_inc(&lsp->ls_count);
6129 p->ctx = get_nfs_open_context(ctx);
6130 memcpy(&p->fl, fl, sizeof(p->fl));
6131 return p;
2f74c0a0
TM		 6132out_free_seqid:
6133 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 6134out_free:
6135 kfree(p);
6136 return NULL;
6137}
6138
6139static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
6140{
6141 struct nfs4_lockdata *data = calldata;
6142 struct nfs4_state *state = data->lsp->ls_state;
06735b34 6143
3110ff80 6144 dprintk("%s: begin!\n", __func__);
2f74c0a0 6145 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 6146 goto out_wait;
a5d16a4d 6147 /* Do we need to do an open_to_lock_owner? */
6b447539 6148 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 6149 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 6150 goto out_release_lock_seqid;
8fe72bac 6151 }
425c1d4e
TM		 6152 nfs4_stateid_copy(&data->arg.open_stateid,
6153 &state->open_stateid);
a5d16a4d 6154 data->arg.new_lock_owner = 1;
c1d51931 6155 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 6156 } else {
2f74c0a0 6157 data->arg.new_lock_owner = 0;
425c1d4e
TM		 6158 nfs4_stateid_copy(&data->arg.lock_stateid,
6159 &data->lsp->ls_stateid);
6160 }
5d422301
TM		 6161 if (!nfs4_valid_open_stateid(state)) {
6162 data->rpc_status = -EBADF;
6163 task->tk_action = NULL;
6164 goto out_release_open_seqid;
6165 }
26e976a8 6166 data->timestamp = jiffies;
035168ab
TM		 6167 if (nfs4_setup_sequence(data->server,
6168 &data->arg.seq_args,
2240a9e2 6169 &data->res.seq_res,
d9afbd1b 6170 task) == 0)
66179efe 6171 return;
5d422301 6172out_release_open_seqid:
2240a9e2
TM		 6173 nfs_release_seqid(data->arg.open_seqid);
6174out_release_lock_seqid:
6175 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 6176out_wait:
6177 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 6178 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 6179}
6180
a5d16a4d
TM		 6181static void nfs4_lock_done(struct rpc_task *task, void *calldata)
6182{
6183 struct nfs4_lockdata *data = calldata;
39071e6f 6184 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 6185
3110ff80 6186 dprintk("%s: begin!\n", __func__);
a5d16a4d 6187
14516c3a
TM		 6188 if (!nfs4_sequence_done(task, &data->res.seq_res))
6189 return;
66179efe 6190
a5d16a4d 6191 data->rpc_status = task->tk_status;
425c1d4e
TM		 6192 switch (task->tk_status) {
6193 case 0:
2b0143b5 6194 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 6195 data->timestamp);
c69899a1
TM		 6196 if (data->arg.new_lock) {
6197 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
75575ddf 6198 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) {
c69899a1
TM		 6199 rpc_restart_call_prepare(task);
6200 break;
6201 }
6202 }
39071e6f
TM		 6203 if (data->arg.new_lock_owner != 0) {
6204 nfs_confirm_seqid(&lsp->ls_seqid, 0);
6205 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
6206 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6207 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
6208 rpc_restart_call_prepare(task);
425c1d4e
TM		 6209 break;
6210 case -NFS4ERR_BAD_STATEID:
6211 case -NFS4ERR_OLD_STATEID:
6212 case -NFS4ERR_STALE_STATEID:
6213 case -NFS4ERR_EXPIRED:
6214 if (data->arg.new_lock_owner != 0) {
6215 if (!nfs4_stateid_match(&data->arg.open_stateid,
6216 &lsp->ls_state->open_stateid))
6217 rpc_restart_call_prepare(task);
6218 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
6219 &lsp->ls_stateid))
6220 rpc_restart_call_prepare(task);
a5d16a4d 6221 }
3110ff80 6222 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 6223}
6224
6225static void nfs4_lock_release(void *calldata)
6226{
6227 struct nfs4_lockdata *data = calldata;
6228
3110ff80 6229 dprintk("%s: begin!\n", __func__);
2f74c0a0 6230 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 6231 if (data->cancelled != 0) {
6232 struct rpc_task *task;
6233 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
6234 data->arg.lock_seqid);
6235 if (!IS_ERR(task))
bf294b41 6236 rpc_put_task_async(task);
3110ff80 6237 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 6238 } else
6239 nfs_free_seqid(data->arg.lock_seqid);
6240 nfs4_put_lock_state(data->lsp);
6241 put_nfs_open_context(data->ctx);
6242 kfree(data);
3110ff80 6243 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 6244}
6245
6246static const struct rpc_call_ops nfs4_lock_ops = {
6247 .rpc_call_prepare = nfs4_lock_prepare,
6248 .rpc_call_done = nfs4_lock_done,
6249 .rpc_release = nfs4_lock_release,
6250};
6251
2bee72a6
TM		 6252static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
6253{
2bee72a6
TM		 6254 switch (error) {
6255 case -NFS4ERR_ADMIN_REVOKED:
d7f3e4bf 6256 case -NFS4ERR_EXPIRED:
2bee72a6 6257 case -NFS4ERR_BAD_STATEID:
ecac799a 6258 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 6259 if (new_lock_owner != 0 ||
795a88c9 6260 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 6261 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 6262 break;
6263 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 6264 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a 6265 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 6266 };
6267}
6268
afe6c27c 6269static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 6270{
6271 struct nfs4_lockdata *data;
6272 struct rpc_task *task;
5138fde0
TM		 6273 struct rpc_message msg = {
6274 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
6275 .rpc_cred = state->owner->so_cred,
6276 };
c970aa85
TM		 6277 struct rpc_task_setup task_setup_data = {
6278 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 6279 .rpc_message = &msg,
c970aa85 6280 .callback_ops = &nfs4_lock_ops,
101070ca 6281 .workqueue = nfsiod_workqueue,
c970aa85
TM		 6282 .flags = RPC_TASK_ASYNC,
6283 };
a5d16a4d
TM		 6284 int ret;
6285
3110ff80 6286 dprintk("%s: begin!\n", __func__);
cd3758e3 6287 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 6288 fl->fl_u.nfs4_fl.owner,
6289 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 6290 if (data == NULL)
6291 return -ENOMEM;
6292 if (IS_SETLKW(cmd))
6293 data->arg.block = 1;
a9c92d6b 6294 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 6295 msg.rpc_argp = &data->arg;
6296 msg.rpc_resp = &data->res;
c970aa85 6297 task_setup_data.callback_data = data;
8fe72bac
TM		 6298 if (recovery_type > NFS_LOCK_NEW) {
6299 if (recovery_type == NFS_LOCK_RECLAIM)
6300 data->arg.reclaim = NFS_LOCK_RECLAIM;
6301 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 6302 } else
6303 data->arg.new_lock = 1;
c970aa85 6304 task = rpc_run_task(&task_setup_data);
7a1218a2 6305 if (IS_ERR(task))
a5d16a4d 6306 return PTR_ERR(task);
a5d16a4d
TM		 6307 ret = nfs4_wait_for_completion_rpc_task(task);
6308 if (ret == 0) {
6309 ret = data->rpc_status;
2bee72a6
TM		 6310 if (ret)
6311 nfs4_handle_setlk_error(data->server, data->lsp,
6312 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 6313 } else
6314 data->cancelled = 1;
e6b3c4db 6315 rpc_put_task(task);
3110ff80 6316 dprintk("%s: done, ret = %d!\n", __func__, ret);
48c9579a 6317 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
a5d16a4d 6318 return ret;
1da177e4
LT		 6319}
6320
6321static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
6322{
202b50dc 6323 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6324 struct nfs4_exception exception = {
6325 .inode = state->inode,
6326 };
202b50dc
TM		 6327 int err;
6328
6329 do {
42a2d13e
TM		 6330 /* Cache the lock if possible... */
6331 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6332 return 0;
afe6c27c 6333 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 6334 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 6335 break;
6336 nfs4_handle_exception(server, err, &exception);
6337 } while (exception.retry);
6338 return err;
1da177e4
LT		 6339}
6340
6341static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
6342{
202b50dc 6343 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6344 struct nfs4_exception exception = {
6345 .inode = state->inode,
6346 };
202b50dc
TM		 6347 int err;
6348
6bfc93ef
TM		 6349 err = nfs4_set_lock_state(state, request);
6350 if (err != 0)
6351 return err;
f6de7a39 6352 if (!recover_lost_locks) {
ef1820f9
N		 6353 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
6354 return 0;
6355 }
202b50dc 6356 do {
42a2d13e
TM		 6357 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6358 return 0;
afe6c27c 6359 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 6360 switch (err) {
6361 default:
6362 goto out;
6363 case -NFS4ERR_GRACE:
6364 case -NFS4ERR_DELAY:
6365 nfs4_handle_exception(server, err, &exception);
6366 err = 0;
6367 }
202b50dc 6368 } while (exception.retry);
a9ed2e25 6369out:
202b50dc 6370 return err;
1da177e4
LT		 6371}
6372
f062eb6c 6373#if defined(CONFIG_NFS_V4_1)
b01dd1d8
BS		 6374static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6375{
c5896fc8
TM		 6376 struct nfs4_lock_state *lsp;
6377 int status;
b01dd1d8 6378
c5896fc8
TM		 6379 status = nfs4_set_lock_state(state, request);
6380 if (status != 0)
6381 return status;
6382 lsp = request->fl_u.nfs4_fl.owner;
6383 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) ||
6384 test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
6385 return 0;
6386 status = nfs4_lock_expired(state, request);
eb64cf96 6387 return status;
f062eb6c
BS		 6388}
6389#endif
6390
1da177e4
LT		 6391static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6392{
19e03c57 6393 struct nfs_inode *nfsi = NFS_I(state->inode);
11476e9d 6394 struct nfs4_state_owner *sp = state->owner;
01c3b861 6395 unsigned char fl_flags = request->fl_flags;
1ea67dbd 6396 int status;
1da177e4 6397
01c3b861 6398 request->fl_flags |= FL_ACCESS;
75575ddf 6399 status = locks_lock_inode_wait(state->inode, request);
01c3b861
TM		 6400 if (status < 0)
6401 goto out;
11476e9d 6402 mutex_lock(&sp->so_delegreturn_mutex);
19e03c57 6403 down_read(&nfsi->rwsem);
01c3b861 6404 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6405 /* Yes: cache locks! */
01c3b861 6406 /* ...but avoid races with delegation recall... */
19e03c57 6407 request->fl_flags = fl_flags & ~FL_SLEEP;
75575ddf 6408 status = locks_lock_inode_wait(state->inode, request);
c69899a1 6409 up_read(&nfsi->rwsem);
11476e9d 6410 mutex_unlock(&sp->so_delegreturn_mutex);
9a99af49 6411 goto out;
9a99af49 6412 }
19e03c57 6413 up_read(&nfsi->rwsem);
11476e9d 6414 mutex_unlock(&sp->so_delegreturn_mutex);
c69899a1 6415 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6416out:
6417 request->fl_flags = fl_flags;
1da177e4
LT		 6418 return status;
6419}
6420
6421static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6422{
a1d0b5ee
TM		 6423 struct nfs4_exception exception = {
6424 .state = state,
05ffe24f 6425 .inode = state->inode,
a1d0b5ee 6426 };
1da177e4
LT		 6427 int err;
6428
6429 do {
965b5d67
TM		 6430 err = _nfs4_proc_setlk(state, cmd, request);
6431 if (err == -NFS4ERR_DENIED)
6432 err = -EAGAIN;
1da177e4 6433 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6434 err, &exception);
1da177e4
LT		 6435 } while (exception.retry);
6436 return err;
6437}
6438
d2f3a7f9
JL		 6439#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
6440#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
6441
6442static int
a1d617d8
JL		 6443nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd,
6444 struct file_lock *request)
d2f3a7f9
JL		 6445{
6446 int status = -ERESTARTSYS;
6447 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6448
6449 while(!signalled()) {
6450 status = nfs4_proc_setlk(state, cmd, request);
6451 if ((status != -EAGAIN) || IS_SETLK(cmd))
6452 break;
6453 freezable_schedule_timeout_interruptible(timeout);
6454 timeout *= 2;
6455 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout);
6456 status = -ERESTARTSYS;
6457 }
6458 return status;
6459}
6460
a1d617d8
JL		 6461#ifdef CONFIG_NFS_V4_1
6462struct nfs4_lock_waiter {
6463 struct task_struct *task;
6464 struct inode *inode;
6465 struct nfs_lowner *owner;
6466 bool notified;
6467};
6468
6469static int
6470nfs4_wake_lock_waiter(wait_queue_t *wait, unsigned int mode, int flags, void *key)
6471{
6472 int ret;
6473 struct cb_notify_lock_args *cbnl = key;
6474 struct nfs4_lock_waiter *waiter = wait->private;
6475 struct nfs_lowner *lowner = &cbnl->cbnl_owner,
6476 *wowner = waiter->owner;
6477
6478 /* Only wake if the callback was for the same owner */
6479 if (lowner->clientid != wowner->clientid ||
6480 lowner->id != wowner->id ||
6481 lowner->s_dev != wowner->s_dev)
6482 return 0;
6483
6484 /* Make sure it's for the right inode */
6485 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
6486 return 0;
6487
6488 waiter->notified = true;
6489
6490 /* override "private" so we can use default_wake_function */
6491 wait->private = waiter->task;
6492 ret = autoremove_wake_function(wait, mode, flags, key);
6493 wait->private = waiter;
6494 return ret;
6495}
6496
6497static int
6498nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6499{
6500 int status = -ERESTARTSYS;
6501 unsigned long flags;
6502 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
6503 struct nfs_server *server = NFS_SERVER(state->inode);
6504 struct nfs_client *clp = server->nfs_client;
6505 wait_queue_head_t *q = &clp->cl_lock_waitq;
6506 struct nfs_lowner owner = { .clientid = clp->cl_clientid,
6507 .id = lsp->ls_seqid.owner_id,
6508 .s_dev = server->s_dev };
6509 struct nfs4_lock_waiter waiter = { .task = current,
6510 .inode = state->inode,
6511 .owner = &owner,
6512 .notified = false };
6513 wait_queue_t wait;
6514
6515 /* Don't bother with waitqueue if we don't expect a callback */
6516 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags))
6517 return nfs4_retry_setlk_simple(state, cmd, request);
6518
6519 init_wait(&wait);
6520 wait.private = &waiter;
6521 wait.func = nfs4_wake_lock_waiter;
6522 add_wait_queue(q, &wait);
6523
6524 while(!signalled()) {
6525 status = nfs4_proc_setlk(state, cmd, request);
6526 if ((status != -EAGAIN) || IS_SETLK(cmd))
6527 break;
6528
6529 status = -ERESTARTSYS;
6530 spin_lock_irqsave(&q->lock, flags);
6531 if (waiter.notified) {
6532 spin_unlock_irqrestore(&q->lock, flags);
6533 continue;
6534 }
6535 set_current_state(TASK_INTERRUPTIBLE);
6536 spin_unlock_irqrestore(&q->lock, flags);
6537
6538 freezable_schedule_timeout_interruptible(NFS4_LOCK_MAXTIMEOUT);
6539 }
6540
6541 finish_wait(q, &wait);
6542 return status;
6543}
6544#else /* !CONFIG_NFS_V4_1 */
6545static inline int
6546nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6547{
6548 return nfs4_retry_setlk_simple(state, cmd, request);
6549}
6550#endif
6551
1da177e4
LT		 6552static int
6553nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6554{
6555 struct nfs_open_context *ctx;
6556 struct nfs4_state *state;
1da177e4
LT		 6557 int status;
6558
6559 /* verify open state */
cd3758e3 6560 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6561 state = ctx->state;
6562
6563 if (request->fl_start < 0 || request->fl_end < 0)
6564 return -EINVAL;
6565
d953126a
TM		 6566 if (IS_GETLK(cmd)) {
6567 if (state != NULL)
6568 return nfs4_proc_getlk(state, F_GETLK, request);
6569 return 0;
6570 }
1da177e4
LT		 6571
6572 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6573 return -EINVAL;
6574
d953126a
TM		 6575 if (request->fl_type == F_UNLCK) {
6576 if (state != NULL)
6577 return nfs4_proc_unlck(state, cmd, request);
6578 return 0;
6579 }
1da177e4 6580
d953126a
TM		 6581 if (state == NULL)
6582 return -ENOLCK;
1ea67dbd
JL		 6583
6584 if ((request->fl_flags & FL_POSIX) &&
6585 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6586 return -ENOLCK;
6587
55725513
TM		 6588 /*
6589 * Don't rely on the VFS having checked the file open mode,
6590 * since it won't do this for flock() locks.
6591 */
f44106e2 6592 switch (request->fl_type) {
55725513
TM		 6593 case F_RDLCK:
6594 if (!(filp->f_mode & FMODE_READ))
6595 return -EBADF;
6596 break;
6597 case F_WRLCK:
6598 if (!(filp->f_mode & FMODE_WRITE))
6599 return -EBADF;
6600 }
6601
1ea67dbd
JL		 6602 status = nfs4_set_lock_state(state, request);
6603 if (status != 0)
6604 return status;
6605
d2f3a7f9 6606 return nfs4_retry_setlk(state, cmd, request);
1da177e4
LT		 6607}
6608
db4f2e63 6609int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6610{
6611 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6612 int err;
6613
6614 err = nfs4_set_lock_state(state, fl);
6615 if (err != 0)
db4f2e63 6616 return err;
4a706fa0 6617 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6618 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6619}
6b3b5496 6620
cf470c3e
TM		 6621struct nfs_release_lockowner_data {
6622 struct nfs4_lock_state *lsp;
5ae67c4f 6623 struct nfs_server *server;
cf470c3e 6624 struct nfs_release_lockowner_args args;
b7e63a10 6625 struct nfs_release_lockowner_res res;
60ea6812 6626 unsigned long timestamp;
cf470c3e
TM		 6627};
6628
fbd4bfd1
CL		 6629static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6630{
6631 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6632 struct nfs_server *server = data->server;
cb04ad2a
PT		 6633 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6634 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6635 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6636 data->timestamp = jiffies;
fbd4bfd1
CL		 6637}
6638
6639static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6640{
6641 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6642 struct nfs_server *server = data->server;
6643
b7e63a10 6644 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6645
6646 switch (task->tk_status) {
6647 case 0:
6648 renew_lease(server, data->timestamp);
6649 break;
6650 case -NFS4ERR_STALE_CLIENTID:
6651 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6652 nfs4_schedule_lease_recovery(server->nfs_client);
6653 break;
60ea6812
CL		 6654 case -NFS4ERR_LEASE_MOVED:
6655 case -NFS4ERR_DELAY:
8478eaa1
N		 6656 if (nfs4_async_handle_error(task, server,
6657 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6658 rpc_restart_call_prepare(task);
6659 }
fbd4bfd1
CL		 6660}
6661
d3c7b7cc
TM		 6662static void nfs4_release_lockowner_release(void *calldata)
6663{
cf470c3e 6664 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6665 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6666 kfree(calldata);
6667}
6668
17280175 6669static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6670 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6671 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6672 .rpc_release = nfs4_release_lockowner_release,
6673};
6674
f1cdae87
JL		 6675static void
6676nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6677{
cf470c3e 6678 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6679 struct rpc_message msg = {
6680 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6681 };
6682
6683 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6684 return;
fbd4bfd1 6685
cf470c3e
TM		 6686 data = kmalloc(sizeof(*data), GFP_NOFS);
6687 if (!data)
f1cdae87 6688 return;
cf470c3e 6689 data->lsp = lsp;
5ae67c4f 6690 data->server = server;
cf470c3e
TM		 6691 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6692 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6693 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6694
cf470c3e 6695 msg.rpc_argp = &data->args;
b7e63a10
TM		 6696 msg.rpc_resp = &data->res;
6697 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6698 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6699}
6700
aa1870af
BF		 6701#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6702
d9a82a04 6703static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
59301226
AV		 6704 struct dentry *unused, struct inode *inode,
6705 const char *key, const void *buf,
6706 size_t buflen, int flags)
6b3b5496 6707{
59301226 6708 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 6709}
6710
d9a82a04 6711static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
b296821a
AV		 6712 struct dentry *unused, struct inode *inode,
6713 const char *key, void *buf, size_t buflen)
6b3b5496 6714{
b296821a 6715 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 6716}
6717
764a5c6b 6718static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6b3b5496 6719{
764a5c6b 6720 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6b3b5496
BF		 6721}
6722
c9bccef6 6723#ifdef CONFIG_NFS_V4_SECURITY_LABEL
c9bccef6 6724
d9a82a04 6725static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
59301226
AV		 6726 struct dentry *unused, struct inode *inode,
6727 const char *key, const void *buf,
6728 size_t buflen, int flags)
c9bccef6
DQ		 6729{
6730 if (security_ismaclabel(key))
59301226 6731 return nfs4_set_security_label(inode, buf, buflen);
c9bccef6
DQ		 6732
6733 return -EOPNOTSUPP;
6734}
6735
d9a82a04 6736static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
b296821a
AV		 6737 struct dentry *unused, struct inode *inode,
6738 const char *key, void *buf, size_t buflen)
c9bccef6
DQ		 6739{
6740 if (security_ismaclabel(key))
b296821a 6741 return nfs4_get_security_label(inode, buf, buflen);
c9bccef6
DQ		 6742 return -EOPNOTSUPP;
6743}
6744
c4803c49
AG		 6745static ssize_t
6746nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
c9bccef6 6747{
c4803c49 6748 int len = 0;
c9bccef6 6749
c4803c49
AG		 6750 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
6751 len = security_inode_listsecurity(inode, list, list_len);
6752 if (list_len && len > list_len)
6753 return -ERANGE;
c9bccef6
DQ		 6754 }
6755 return len;
6756}
6757
6758static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6759 .prefix = XATTR_SECURITY_PREFIX,
c9bccef6
DQ		 6760 .get = nfs4_xattr_get_nfs4_label,
6761 .set = nfs4_xattr_set_nfs4_label,
6762};
c9bccef6 6763
c4803c49
AG		 6764#else
6765
6766static ssize_t
6767nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6768{
6769 return 0;
6770}
6771
6772#endif
c9bccef6 6773
533eb461
AA		 6774/*
6775 * nfs_fhget will use either the mounted_on_fileid or the fileid
6776 */
69aaaae1
TM		 6777static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6778{
533eb461
AA		 6779 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6780 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6781 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6782 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6783 return;
6784
6785 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6786 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6787 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6788 fattr->nlink = 2;
6789}
6790
f05d147f
BS		 6791static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6792 const struct qstr *name,
6793 struct nfs4_fs_locations *fs_locations,
6794 struct page *page)
683b57b4
TM		 6795{
6796 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6797 u32 bitmask[3] = {
361e624f 6798 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6799 };
6800 struct nfs4_fs_locations_arg args = {
6801 .dir_fh = NFS_FH(dir),
c228fd3a 6802 .name = name,
683b57b4
TM		 6803 .page = page,
6804 .bitmask = bitmask,
6805 };
22958463
BH		 6806 struct nfs4_fs_locations_res res = {
6807 .fs_locations = fs_locations,
6808 };
683b57b4
TM		 6809 struct rpc_message msg = {
6810 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6811 .rpc_argp = &args,
22958463 6812 .rpc_resp = &res,
683b57b4
TM		 6813 };
6814 int status;
6815
3110ff80 6816 dprintk("%s: start\n", __func__);
533eb461
AA		 6817
6818 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6819 * is not supported */
6820 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6821 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6822 else
6823 bitmask[0] |= FATTR4_WORD0_FILEID;
6824
c228fd3a 6825 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6826 fs_locations->server = server;
830b8e33 6827 fs_locations->nlocations = 0;
f05d147f 6828 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6829 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6830 return status;
6831}
6832
f05d147f
BS		 6833int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6834 const struct qstr *name,
6835 struct nfs4_fs_locations *fs_locations,
6836 struct page *page)
db0a9593
BS		 6837{
6838 struct nfs4_exception exception = { };
6839 int err;
6840 do {
078ea3df
TM		 6841 err = _nfs4_proc_fs_locations(client, dir, name,
6842 fs_locations, page);
6843 trace_nfs4_get_fs_locations(dir, name, err);
6844 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6845 &exception);
6846 } while (exception.retry);
6847 return err;
6848}
6849
b03d735b
CL		 6850/*
6851 * This operation also signals the server that this client is
6852 * performing migration recovery. The server can stop returning
6853 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6854 * appended to this compound to identify the client ID which is
6855 * performing recovery.
6856 */
6857static int _nfs40_proc_get_locations(struct inode *inode,
6858 struct nfs4_fs_locations *locations,
6859 struct page *page, struct rpc_cred *cred)
6860{
6861 struct nfs_server *server = NFS_SERVER(inode);
6862 struct rpc_clnt *clnt = server->client;
6863 u32 bitmask[2] = {
6864 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6865 };
6866 struct nfs4_fs_locations_arg args = {
6867 .clientid = server->nfs_client->cl_clientid,
6868 .fh = NFS_FH(inode),
6869 .page = page,
6870 .bitmask = bitmask,
6871 .migration = 1, /* skip LOOKUP */
6872 .renew = 1, /* append RENEW */
6873 };
6874 struct nfs4_fs_locations_res res = {
6875 .fs_locations = locations,
6876 .migration = 1,
6877 .renew = 1,
6878 };
6879 struct rpc_message msg = {
6880 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6881 .rpc_argp = &args,
6882 .rpc_resp = &res,
6883 .rpc_cred = cred,
6884 };
6885 unsigned long now = jiffies;
6886 int status;
6887
6888 nfs_fattr_init(&locations->fattr);
6889 locations->server = server;
6890 locations->nlocations = 0;
6891
6892 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6893 nfs4_set_sequence_privileged(&args.seq_args);
6894 status = nfs4_call_sync_sequence(clnt, server, &msg,
6895 &args.seq_args, &res.seq_res);
6896 if (status)
6897 return status;
6898
6899 renew_lease(server, now);
6900 return 0;
6901}
6902
6903#ifdef CONFIG_NFS_V4_1
6904
6905/*
6906 * This operation also signals the server that this client is
6907 * performing migration recovery. The server can stop asserting
6908 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6909 * performing this operation is identified in the SEQUENCE
6910 * operation in this compound.
6911 *
6912 * When the client supports GETATTR(fs_locations_info), it can
6913 * be plumbed in here.
6914 */
6915static int _nfs41_proc_get_locations(struct inode *inode,
6916 struct nfs4_fs_locations *locations,
6917 struct page *page, struct rpc_cred *cred)
6918{
6919 struct nfs_server *server = NFS_SERVER(inode);
6920 struct rpc_clnt *clnt = server->client;
6921 u32 bitmask[2] = {
6922 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6923 };
6924 struct nfs4_fs_locations_arg args = {
6925 .fh = NFS_FH(inode),
6926 .page = page,
6927 .bitmask = bitmask,
6928 .migration = 1, /* skip LOOKUP */
6929 };
6930 struct nfs4_fs_locations_res res = {
6931 .fs_locations = locations,
6932 .migration = 1,
6933 };
6934 struct rpc_message msg = {
6935 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6936 .rpc_argp = &args,
6937 .rpc_resp = &res,
6938 .rpc_cred = cred,
6939 };
6940 int status;
6941
6942 nfs_fattr_init(&locations->fattr);
6943 locations->server = server;
6944 locations->nlocations = 0;
6945
6946 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6947 nfs4_set_sequence_privileged(&args.seq_args);
6948 status = nfs4_call_sync_sequence(clnt, server, &msg,
6949 &args.seq_args, &res.seq_res);
6950 if (status == NFS4_OK &&
6951 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6952 status = -NFS4ERR_LEASE_MOVED;
6953 return status;
6954}
6955
6956#endif /* CONFIG_NFS_V4_1 */
6957
6958/**
6959 * nfs4_proc_get_locations - discover locations for a migrated FSID
6960 * @inode: inode on FSID that is migrating
6961 * @locations: result of query
6962 * @page: buffer
6963 * @cred: credential to use for this operation
6964 *
6965 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6966 * operation failed, or a negative errno if a local error occurred.
6967 *
6968 * On success, "locations" is filled in, but if the server has
6969 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6970 * asserted.
6971 *
6972 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6973 * from this client that require migration recovery.
6974 */
6975int nfs4_proc_get_locations(struct inode *inode,
6976 struct nfs4_fs_locations *locations,
6977 struct page *page, struct rpc_cred *cred)
6978{
6979 struct nfs_server *server = NFS_SERVER(inode);
6980 struct nfs_client *clp = server->nfs_client;
6981 const struct nfs4_mig_recovery_ops *ops =
6982 clp->cl_mvops->mig_recovery_ops;
6983 struct nfs4_exception exception = { };
6984 int status;
6985
6986 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6987 (unsigned long long)server->fsid.major,
6988 (unsigned long long)server->fsid.minor,
6989 clp->cl_hostname);
6990 nfs_display_fhandle(NFS_FH(inode), __func__);
6991
6992 do {
6993 status = ops->get_locations(inode, locations, page, cred);
6994 if (status != -NFS4ERR_DELAY)
6995 break;
6996 nfs4_handle_exception(server, status, &exception);
6997 } while (exception.retry);
6998 return status;
6999}
7000
44c99933
CL		 7001/*
7002 * This operation also signals the server that this client is
7003 * performing "lease moved" recovery. The server can stop
7004 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
7005 * is appended to this compound to identify the client ID which is
7006 * performing recovery.
7007 */
7008static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7009{
7010 struct nfs_server *server = NFS_SERVER(inode);
7011 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
7012 struct rpc_clnt *clnt = server->client;
7013 struct nfs4_fsid_present_arg args = {
7014 .fh = NFS_FH(inode),
7015 .clientid = clp->cl_clientid,
7016 .renew = 1, /* append RENEW */
7017 };
7018 struct nfs4_fsid_present_res res = {
7019 .renew = 1,
7020 };
7021 struct rpc_message msg = {
7022 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
7023 .rpc_argp = &args,
7024 .rpc_resp = &res,
7025 .rpc_cred = cred,
7026 };
7027 unsigned long now = jiffies;
7028 int status;
7029
7030 res.fh = nfs_alloc_fhandle();
7031 if (res.fh == NULL)
7032 return -ENOMEM;
7033
7034 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
7035 nfs4_set_sequence_privileged(&args.seq_args);
7036 status = nfs4_call_sync_sequence(clnt, server, &msg,
7037 &args.seq_args, &res.seq_res);
7038 nfs_free_fhandle(res.fh);
7039 if (status)
7040 return status;
7041
7042 do_renew_lease(clp, now);
7043 return 0;
7044}
7045
7046#ifdef CONFIG_NFS_V4_1
7047
7048/*
7049 * This operation also signals the server that this client is
7050 * performing "lease moved" recovery. The server can stop asserting
7051 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
7052 * this operation is identified in the SEQUENCE operation in this
7053 * compound.
7054 */
7055static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7056{
7057 struct nfs_server *server = NFS_SERVER(inode);
7058 struct rpc_clnt *clnt = server->client;
7059 struct nfs4_fsid_present_arg args = {
7060 .fh = NFS_FH(inode),
7061 };
7062 struct nfs4_fsid_present_res res = {
7063 };
7064 struct rpc_message msg = {
7065 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
7066 .rpc_argp = &args,
7067 .rpc_resp = &res,
7068 .rpc_cred = cred,
7069 };
7070 int status;
7071
7072 res.fh = nfs_alloc_fhandle();
7073 if (res.fh == NULL)
7074 return -ENOMEM;
7075
7076 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
7077 nfs4_set_sequence_privileged(&args.seq_args);
7078 status = nfs4_call_sync_sequence(clnt, server, &msg,
7079 &args.seq_args, &res.seq_res);
7080 nfs_free_fhandle(res.fh);
7081 if (status == NFS4_OK &&
7082 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
7083 status = -NFS4ERR_LEASE_MOVED;
7084 return status;
7085}
7086
7087#endif /* CONFIG_NFS_V4_1 */
7088
7089/**
7090 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
7091 * @inode: inode on FSID to check
7092 * @cred: credential to use for this operation
7093 *
7094 * Server indicates whether the FSID is present, moved, or not
7095 * recognized. This operation is necessary to clear a LEASE_MOVED
7096 * condition for this client ID.
7097 *
7098 * Returns NFS4_OK if the FSID is present on this server,
7099 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
7100 * NFS4ERR code if some error occurred on the server, or a
7101 * negative errno if a local failure occurred.
7102 */
7103int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7104{
7105 struct nfs_server *server = NFS_SERVER(inode);
7106 struct nfs_client *clp = server->nfs_client;
7107 const struct nfs4_mig_recovery_ops *ops =
7108 clp->cl_mvops->mig_recovery_ops;
7109 struct nfs4_exception exception = { };
7110 int status;
7111
7112 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
7113 (unsigned long long)server->fsid.major,
7114 (unsigned long long)server->fsid.minor,
7115 clp->cl_hostname);
7116 nfs_display_fhandle(NFS_FH(inode), __func__);
7117
7118 do {
7119 status = ops->fsid_present(inode, cred);
7120 if (status != -NFS4ERR_DELAY)
7121 break;
7122 nfs4_handle_exception(server, status, &exception);
7123 } while (exception.retry);
7124 return status;
7125}
7126
5ec16a85 7127/**
a5250def
WAA		 7128 * If 'use_integrity' is true and the state managment nfs_client
7129 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
7130 * and the machine credential as per RFC3530bis and RFC5661 Security
7131 * Considerations sections. Otherwise, just use the user cred with the
7132 * filesystem's rpc_client.
5ec16a85 7133 */
a5250def 7134static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 7135{
7136 int status;
7137 struct nfs4_secinfo_arg args = {
7138 .dir_fh = NFS_FH(dir),
7139 .name = name,
7140 };
7141 struct nfs4_secinfo_res res = {
7142 .flavors = flavors,
7143 };
7144 struct rpc_message msg = {
7145 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
7146 .rpc_argp = &args,
7147 .rpc_resp = &res,
7148 };
a5250def 7149 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 7150 struct rpc_cred *cred = NULL;
a5250def
WAA		 7151
7152 if (use_integrity) {
7153 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 7154 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
7155 msg.rpc_cred = cred;
a5250def 7156 }
5a5ea0d4
BS		 7157
7158 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 7159
7160 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
7161 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
7162
a5250def
WAA		 7163 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
7164 &res.seq_res, 0);
5a5ea0d4 7165 dprintk("NFS reply secinfo: %d\n", status);
a5250def 7166
7cb852df
WAA		 7167 if (cred)
7168 put_rpccred(cred);
a5250def 7169
5a5ea0d4
BS		 7170 return status;
7171}
7172
72de53ec
BS		 7173int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
7174 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 7175{
7176 struct nfs4_exception exception = { };
7177 int err;
7178 do {
a5250def
WAA		 7179 err = -NFS4ERR_WRONGSEC;
7180
7181 /* try to use integrity protection with machine cred */
7182 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
7183 err = _nfs4_proc_secinfo(dir, name, flavors, true);
7184
7185 /*
7186 * if unable to use integrity protection, or SECINFO with
7187 * integrity protection returns NFS4ERR_WRONGSEC (which is
7188 * disallowed by spec, but exists in deployed servers) use
7189 * the current filesystem's rpc_client and the user cred.
7190 */
7191 if (err == -NFS4ERR_WRONGSEC)
7192 err = _nfs4_proc_secinfo(dir, name, flavors, false);
7193
078ea3df
TM		 7194 trace_nfs4_secinfo(dir, name, err);
7195 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 7196 &exception);
7197 } while (exception.retry);
7198 return err;
7199}
7200
557134a3 7201#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 7202/*
7203 * Check the exchange flags returned by the server for invalid flags, having
7204 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
7205 * DS flags set.
7206 */
7207static int nfs4_check_cl_exchange_flags(u32 flags)
7208{
7209 if (flags & ~EXCHGID4_FLAG_MASK_R)
7210 goto out_inval;
7211 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
7212 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
7213 goto out_inval;
7214 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
7215 goto out_inval;
7216 return NFS_OK;
7217out_inval:
7218 return -NFS4ERR_INVAL;
7219}
7220
78fe0f41 7221static bool
79d4e1f0
CL		 7222nfs41_same_server_scope(struct nfs41_server_scope *a,
7223 struct nfs41_server_scope *b)
78fe0f41
WAA		 7224{
7225 if (a->server_scope_sz == b->server_scope_sz &&
7226 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
7227 return true;
7228
7229 return false;
7230}
7231
02a95dee
AA		 7232static void
7233nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
7234{
7235}
7236
7237static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
7238 .rpc_call_done = &nfs4_bind_one_conn_to_session_done,
7239};
7240
7c44f1ae 7241/*
d9ddbf5d 7242 * nfs4_proc_bind_one_conn_to_session()
7c44f1ae
WAA		 7243 *
7244 * The 4.1 client currently uses the same TCP connection for the
7245 * fore and backchannel.
7246 */
d9ddbf5d
TM		 7247static
7248int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
7249 struct rpc_xprt *xprt,
7250 struct nfs_client *clp,
7251 struct rpc_cred *cred)
7c44f1ae
WAA		 7252{
7253 int status;
71a097c6
TM		 7254 struct nfs41_bind_conn_to_session_args args = {
7255 .client = clp,
7256 .dir = NFS4_CDFC4_FORE_OR_BOTH,
7257 };
7c44f1ae
WAA		 7258 struct nfs41_bind_conn_to_session_res res;
7259 struct rpc_message msg = {
7260 .rpc_proc =
7261 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 7262 .rpc_argp = &args,
7c44f1ae 7263 .rpc_resp = &res,
2cf047c9 7264 .rpc_cred = cred,
7c44f1ae 7265 };
d9ddbf5d
TM		 7266 struct rpc_task_setup task_setup_data = {
7267 .rpc_client = clnt,
7268 .rpc_xprt = xprt,
02a95dee 7269 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
d9ddbf5d
TM		 7270 .rpc_message = &msg,
7271 .flags = RPC_TASK_TIMEOUT,
7272 };
7273 struct rpc_task *task;
7c44f1ae
WAA		 7274
7275 dprintk("--> %s\n", __func__);
7c44f1ae 7276
71a097c6
TM		 7277 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
7278 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
7279 args.dir = NFS4_CDFC4_FORE;
7c44f1ae 7280
d9ddbf5d
TM		 7281 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
7282 if (xprt != rcu_access_pointer(clnt->cl_xprt))
7283 args.dir = NFS4_CDFC4_FORE;
7284
7285 task = rpc_run_task(&task_setup_data);
7286 if (!IS_ERR(task)) {
7287 status = task->tk_status;
7288 rpc_put_task(task);
7289 } else
7290 status = PTR_ERR(task);
c6d01c6f 7291 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 7292 if (status == 0) {
71a097c6 7293 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 7294 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
7295 dprintk("NFS: %s: Session ID mismatch\n", __func__);
7296 status = -EIO;
71a097c6 7297 goto out;
7c44f1ae 7298 }
71a097c6 7299 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 7300 dprintk("NFS: %s: Unexpected direction from server\n",
7301 __func__);
7302 status = -EIO;
71a097c6 7303 goto out;
7c44f1ae 7304 }
71a097c6 7305 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 7306 dprintk("NFS: %s: Server returned RDMA mode = true\n",
7307 __func__);
7308 status = -EIO;
71a097c6 7309 goto out;
7c44f1ae
WAA		 7310 }
7311 }
7c44f1ae
WAA		 7312out:
7313 dprintk("<-- %s status= %d\n", __func__, status);
7314 return status;
7315}
7316
d9ddbf5d
TM		 7317struct rpc_bind_conn_calldata {
7318 struct nfs_client *clp;
7319 struct rpc_cred *cred;
7320};
7321
7322static int
7323nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
7324 struct rpc_xprt *xprt,
7325 void *calldata)
7326{
7327 struct rpc_bind_conn_calldata *p = calldata;
7328
7329 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
7330}
7331
7332int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7333{
7334 struct rpc_bind_conn_calldata data = {
7335 .clp = clp,
7336 .cred = cred,
7337 };
7338 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
7339 nfs4_proc_bind_conn_to_session_callback, &data);
7340}
7341
99fe60d0 7342/*
fa940720
WAA		 7343 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
7344 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 7345 */
7346static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
7347 .how = SP4_MACH_CRED,
7348 .enforce.u.words = {
7349 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7350 1 << (OP_EXCHANGE_ID - 32) |
7351 1 << (OP_CREATE_SESSION - 32) |
7352 1 << (OP_DESTROY_SESSION - 32) |
7353 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 7354 },
7355 .allow.u.words = {
7356 [0] = 1 << (OP_CLOSE) |
99ade3c7 7357 1 << (OP_OPEN_DOWNGRADE) |
a0279625 7358 1 << (OP_LOCKU) |
99ade3c7 7359 1 << (OP_DELEGRETURN) |
a0279625 7360 1 << (OP_COMMIT),
8b5bee2e 7361 [1] = 1 << (OP_SECINFO - 32) |
3787d506 7362 1 << (OP_SECINFO_NO_NAME - 32) |
99ade3c7 7363 1 << (OP_LAYOUTRETURN - 32) |
3787d506 7364 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 7365 1 << (OP_FREE_STATEID - 32) |
7366 1 << (OP_WRITE - 32)
2031cd1a
WAA		 7367 }
7368};
7369
7370/*
7371 * Select the state protection mode for client `clp' given the server results
7372 * from exchange_id in `sp'.
99fe60d0 7373 *
2031cd1a
WAA		 7374 * Returns 0 on success, negative errno otherwise.
7375 */
7376static int nfs4_sp4_select_mode(struct nfs_client *clp,
7377 struct nfs41_state_protection *sp)
7378{
7379 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
7380 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7381 1 << (OP_EXCHANGE_ID - 32) |
7382 1 << (OP_CREATE_SESSION - 32) |
7383 1 << (OP_DESTROY_SESSION - 32) |
7384 1 << (OP_DESTROY_CLIENTID - 32)
7385 };
7386 unsigned int i;
7387
7388 if (sp->how == SP4_MACH_CRED) {
7389 /* Print state protect result */
7390 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
7391 for (i = 0; i <= LAST_NFS4_OP; i++) {
7392 if (test_bit(i, sp->enforce.u.longs))
7393 dfprintk(MOUNT, " enforce op %d\n", i);
7394 if (test_bit(i, sp->allow.u.longs))
7395 dfprintk(MOUNT, " allow op %d\n", i);
7396 }
7397
7398 /* make sure nothing is on enforce list that isn't supported */
7399 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
7400 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
7401 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7402 return -EINVAL;
7403 }
7404 }
7405
7406 /*
7407 * Minimal mode - state operations are allowed to use machine
7408 * credential. Note this already happens by default, so the
7409 * client doesn't have to do anything more than the negotiation.
7410 *
7411 * NOTE: we don't care if EXCHANGE_ID is in the list -
7412 * we're already using the machine cred for exchange_id
7413 * and will never use a different cred.
7414 */
7415 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
7416 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
7417 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
7418 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
7419 dfprintk(MOUNT, "sp4_mach_cred:\n");
7420 dfprintk(MOUNT, " minimal mode enabled\n");
7421 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
7422 } else {
7423 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7424 return -EINVAL;
7425 }
fa940720
WAA		 7426
7427 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
99ade3c7
AE		 7428 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
7429 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
fa940720
WAA		 7430 test_bit(OP_LOCKU, sp->allow.u.longs)) {
7431 dfprintk(MOUNT, " cleanup mode enabled\n");
7432 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
7433 }
8b5bee2e 7434
99ade3c7
AE		 7435 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
7436 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
7437 set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP,
7438 &clp->cl_sp4_flags);
7439 }
7440
8b5bee2e
WAA		 7441 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
7442 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
7443 dfprintk(MOUNT, " secinfo mode enabled\n");
7444 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
7445 }
3787d506
WAA		 7446
7447 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
7448 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
7449 dfprintk(MOUNT, " stateid mode enabled\n");
7450 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
7451 }
8c21c62c
WAA		 7452
7453 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
7454 dfprintk(MOUNT, " write mode enabled\n");
7455 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
7456 }
7457
7458 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
7459 dfprintk(MOUNT, " commit mode enabled\n");
7460 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
7461 }
2031cd1a
WAA		 7462 }
7463
7464 return 0;
7465}
7466
8d89bd70
AA		 7467struct nfs41_exchange_id_data {
7468 struct nfs41_exchange_id_res res;
7469 struct nfs41_exchange_id_args args;
ad0849a7 7470 struct rpc_xprt *xprt;
8d89bd70
AA		 7471 int rpc_status;
7472};
7473
7474static void nfs4_exchange_id_done(struct rpc_task *task, void *data)
7475{
7476 struct nfs41_exchange_id_data *cdata =
7477 (struct nfs41_exchange_id_data *)data;
7478 struct nfs_client *clp = cdata->args.client;
7479 int status = task->tk_status;
7480
7481 trace_nfs4_exchange_id(clp, status);
7482
7483 if (status == 0)
7484 status = nfs4_check_cl_exchange_flags(cdata->res.flags);
ad0849a7
AA		 7485
7486 if (cdata->xprt && status == 0) {
7487 status = nfs4_detect_session_trunking(clp, &cdata->res,
7488 cdata->xprt);
7489 goto out;
7490 }
7491
8d89bd70
AA		 7492 if (status == 0)
7493 status = nfs4_sp4_select_mode(clp, &cdata->res.state_protect);
7494
7495 if (status == 0) {
7496 clp->cl_clientid = cdata->res.clientid;
7497 clp->cl_exchange_flags = cdata->res.flags;
7498 /* Client ID is not confirmed */
7499 if (!(cdata->res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7500 clear_bit(NFS4_SESSION_ESTABLISHED,
7501 &clp->cl_session->session_state);
7502 clp->cl_seqid = cdata->res.seqid;
7503 }
7504
7505 kfree(clp->cl_serverowner);
7506 clp->cl_serverowner = cdata->res.server_owner;
7507 cdata->res.server_owner = NULL;
7508
7509 /* use the most recent implementation id */
7510 kfree(clp->cl_implid);
7511 clp->cl_implid = cdata->res.impl_id;
7512 cdata->res.impl_id = NULL;
7513
7514 if (clp->cl_serverscope != NULL &&
7515 !nfs41_same_server_scope(clp->cl_serverscope,
7516 cdata->res.server_scope)) {
7517 dprintk("%s: server_scope mismatch detected\n",
7518 __func__);
7519 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
7520 kfree(clp->cl_serverscope);
7521 clp->cl_serverscope = NULL;
7522 }
7523
7524 if (clp->cl_serverscope == NULL) {
7525 clp->cl_serverscope = cdata->res.server_scope;
7526 cdata->res.server_scope = NULL;
7527 }
ad0849a7
AA		 7528 /* Save the EXCHANGE_ID verifier session trunk tests */
7529 memcpy(clp->cl_confirm.data, cdata->args.verifier->data,
7530 sizeof(clp->cl_confirm.data));
8d89bd70 7531 }
ad0849a7 7532out:
8d89bd70 7533 cdata->rpc_status = status;
ad0849a7 7534 return;
8d89bd70
AA		 7535}
7536
7537static void nfs4_exchange_id_release(void *data)
7538{
7539 struct nfs41_exchange_id_data *cdata =
7540 (struct nfs41_exchange_id_data *)data;
7541
7542 nfs_put_client(cdata->args.client);
ad0849a7
AA		 7543 if (cdata->xprt) {
7544 xprt_put(cdata->xprt);
7545 rpc_clnt_xprt_switch_put(cdata->args.client->cl_rpcclient);
7546 }
8d89bd70
AA		 7547 kfree(cdata->res.impl_id);
7548 kfree(cdata->res.server_scope);
7549 kfree(cdata->res.server_owner);
7550 kfree(cdata);
7551}
7552
7553static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
7554 .rpc_call_done = nfs4_exchange_id_done,
7555 .rpc_release = nfs4_exchange_id_release,
7556};
7557
2031cd1a
WAA		 7558/*
7559 * _nfs4_proc_exchange_id()
6bbb4ae8 7560 *
2031cd1a 7561 * Wrapper for EXCHANGE_ID operation.
99fe60d0 7562 */
2031cd1a 7563static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
ad0849a7 7564 u32 sp4_how, struct rpc_xprt *xprt)
99fe60d0
BH		 7565{
7566 nfs4_verifier verifier;
99fe60d0
BH		 7567 struct rpc_message msg = {
7568 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
99fe60d0
BH		 7569 .rpc_cred = cred,
7570 };
8d89bd70
AA		 7571 struct rpc_task_setup task_setup_data = {
7572 .rpc_client = clp->cl_rpcclient,
7573 .callback_ops = &nfs4_exchange_id_call_ops,
7574 .rpc_message = &msg,
7575 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
7576 };
7577 struct nfs41_exchange_id_data *calldata;
7578 struct rpc_task *task;
7579 int status = -EIO;
7580
7581 if (!atomic_inc_not_zero(&clp->cl_count))
7582 goto out;
7583
7584 status = -ENOMEM;
7585 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7586 if (!calldata)
7587 goto out;
99fe60d0 7588
ad0849a7
AA		 7589 if (!xprt)
7590 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 7591
7592 status = nfs4_init_uniform_client_string(clp);
7593 if (status)
8d89bd70 7594 goto out_calldata;
3a6bb738
JL		 7595
7596 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6bbb4ae8 7597 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 7598 clp->cl_owner_id);
99fe60d0 7599
8d89bd70
AA		 7600 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
7601 GFP_NOFS);
7602 status = -ENOMEM;
7603 if (unlikely(calldata->res.server_owner == NULL))
7604 goto out_calldata;
78fe0f41 7605
8d89bd70 7606 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 7607 GFP_NOFS);
8d89bd70 7608 if (unlikely(calldata->res.server_scope == NULL))
acdeb69d 7609 goto out_server_owner;
78fe0f41 7610
8d89bd70
AA		 7611 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
7612 if (unlikely(calldata->res.impl_id == NULL))
7d2ed9ac 7613 goto out_server_scope;
7d2ed9ac 7614
2031cd1a
WAA		 7615 switch (sp4_how) {
7616 case SP4_NONE:
8d89bd70 7617 calldata->args.state_protect.how = SP4_NONE;
2031cd1a
WAA		 7618 break;
7619
7620 case SP4_MACH_CRED:
8d89bd70 7621 calldata->args.state_protect = nfs4_sp4_mach_cred_request;
2031cd1a
WAA		 7622 break;
7623
7624 default:
7625 /* unsupported! */
7626 WARN_ON_ONCE(1);
7627 status = -EINVAL;
6b55970b 7628 goto out_impl_id;
2031cd1a 7629 }
ad0849a7
AA		 7630 if (xprt) {
7631 calldata->xprt = xprt;
7632 task_setup_data.rpc_xprt = xprt;
7633 task_setup_data.flags =
7634 RPC_TASK_SOFT|RPC_TASK_SOFTCONN|RPC_TASK_ASYNC;
7635 calldata->args.verifier = &clp->cl_confirm;
7636 } else {
7637 calldata->args.verifier = &verifier;
7638 }
8d89bd70
AA		 7639 calldata->args.client = clp;
7640#ifdef CONFIG_NFS_V4_1_MIGRATION
7641 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7642 EXCHGID4_FLAG_BIND_PRINC_STATEID |
7643 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
7644#else
7645 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7646 EXCHGID4_FLAG_BIND_PRINC_STATEID,
7647#endif
7648 msg.rpc_argp = &calldata->args;
7649 msg.rpc_resp = &calldata->res;
7650 task_setup_data.callback_data = calldata;
2031cd1a 7651
8d89bd70
AA		 7652 task = rpc_run_task(&task_setup_data);
7653 if (IS_ERR(task)) {
7654 status = PTR_ERR(task);
7655 goto out_impl_id;
6b55970b 7656 }
7d2ed9ac 7657
ad0849a7
AA		 7658 if (!xprt) {
7659 status = rpc_wait_for_completion_task(task);
7660 if (!status)
7661 status = calldata->rpc_status;
7662 } else /* session trunking test */
8d89bd70 7663 status = calldata->rpc_status;
ad0849a7 7664
8d89bd70 7665 rpc_put_task(task);
abe9a6d5 7666out:
177313f1 7667 if (clp->cl_implid != NULL)
6bbb4ae8 7668 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 7669 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 7670 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 7671 clp->cl_implid->date.seconds,
7672 clp->cl_implid->date.nseconds);
6bbb4ae8 7673 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0 7674 return status;
8d89bd70
AA		 7675
7676out_impl_id:
7677 kfree(calldata->res.impl_id);
7678out_server_scope:
7679 kfree(calldata->res.server_scope);
7680out_server_owner:
7681 kfree(calldata->res.server_owner);
7682out_calldata:
7683 kfree(calldata);
7684 goto out;
99fe60d0
BH		 7685}
7686
2031cd1a
WAA		 7687/*
7688 * nfs4_proc_exchange_id()
7689 *
7690 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7691 *
7692 * Since the clientid has expired, all compounds using sessions
7693 * associated with the stale clientid will be returning
7694 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7695 * be in some phase of session reset.
7696 *
7697 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7698 */
7699int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7700{
7701 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7702 int status;
7703
7704 /* try SP4_MACH_CRED if krb5i/p */
7705 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7706 authflavor == RPC_AUTH_GSS_KRB5P) {
ad0849a7 7707 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED, NULL);
2031cd1a
WAA		 7708 if (!status)
7709 return 0;
7710 }
7711
7712 /* try SP4_NONE */
ad0849a7 7713 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE, NULL);
2031cd1a
WAA		 7714}
7715
04fa2c6b
AA		 7716/**
7717 * nfs4_test_session_trunk
7718 *
7719 * This is an add_xprt_test() test function called from
7720 * rpc_clnt_setup_test_and_add_xprt.
7721 *
7722 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt
7723 * and is dereferrenced in nfs4_exchange_id_release
7724 *
7725 * Upon success, add the new transport to the rpc_clnt
7726 *
7727 * @clnt: struct rpc_clnt to get new transport
7728 * @xprt: the rpc_xprt to test
7729 * @data: call data for _nfs4_proc_exchange_id.
7730 */
7731int nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
7732 void *data)
7733{
7734 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data;
7735 u32 sp4_how;
7736
7737 dprintk("--> %s try %s\n", __func__,
7738 xprt->address_strings[RPC_DISPLAY_ADDR]);
7739
7740 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED);
7741
7742 /* Test connection for session trunking. Async exchange_id call */
7743 return _nfs4_proc_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
2031cd1a 7744}
04fa2c6b 7745EXPORT_SYMBOL_GPL(nfs4_test_session_trunk);
2031cd1a 7746
66245539
TM		 7747static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7748 struct rpc_cred *cred)
7749{
7750 struct rpc_message msg = {
7751 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7752 .rpc_argp = clp,
7753 .rpc_cred = cred,
7754 };
7755 int status;
7756
7757 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7758 trace_nfs4_destroy_clientid(clp, status);
66245539 7759 if (status)
02c67525 7760 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7761 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7762 return status;
7763}
7764
7765static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7766 struct rpc_cred *cred)
7767{
7768 unsigned int loop;
7769 int ret;
7770
7771 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7772 ret = _nfs4_proc_destroy_clientid(clp, cred);
7773 switch (ret) {
7774 case -NFS4ERR_DELAY:
7775 case -NFS4ERR_CLIENTID_BUSY:
7776 ssleep(1);
7777 break;
7778 default:
7779 return ret;
7780 }
7781 }
7782 return 0;
7783}
7784
7785int nfs4_destroy_clientid(struct nfs_client *clp)
7786{
7787 struct rpc_cred *cred;
7788 int ret = 0;
7789
7790 if (clp->cl_mvops->minor_version < 1)
7791 goto out;
7792 if (clp->cl_exchange_flags == 0)
7793 goto out;
05f4c350
CL		 7794 if (clp->cl_preserve_clid)
7795 goto out;
73d8bde5 7796 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7797 ret = nfs4_proc_destroy_clientid(clp, cred);
7798 if (cred)
7799 put_rpccred(cred);
7800 switch (ret) {
7801 case 0:
7802 case -NFS4ERR_STALE_CLIENTID:
7803 clp->cl_exchange_flags = 0;
7804 }
7805out:
7806 return ret;
7807}
7808
2050f0cc
AA		 7809struct nfs4_get_lease_time_data {
7810 struct nfs4_get_lease_time_args *args;
7811 struct nfs4_get_lease_time_res *res;
7812 struct nfs_client *clp;
7813};
7814
7815static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7816 void *calldata)
7817{
2050f0cc
AA		 7818 struct nfs4_get_lease_time_data *data =
7819 (struct nfs4_get_lease_time_data *)calldata;
7820
7821 dprintk("--> %s\n", __func__);
7822 /* just setup sequence, do not trigger session recovery
7823 since we're invoked within one */
d9afbd1b
TM		 7824 nfs41_setup_sequence(data->clp->cl_session,
7825 &data->args->la_seq_args,
7826 &data->res->lr_seq_res,
7827 task);
2050f0cc
AA		 7828 dprintk("<-- %s\n", __func__);
7829}
7830
7831/*
7832 * Called from nfs4_state_manager thread for session setup, so don't recover
7833 * from sequence operation or clientid errors.
7834 */
7835static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7836{
7837 struct nfs4_get_lease_time_data *data =
7838 (struct nfs4_get_lease_time_data *)calldata;
7839
7840 dprintk("--> %s\n", __func__);
14516c3a
TM		 7841 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7842 return;
2050f0cc
AA		 7843 switch (task->tk_status) {
7844 case -NFS4ERR_DELAY:
7845 case -NFS4ERR_GRACE:
7846 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7847 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7848 task->tk_status = 0;
a8a4ae3a
AA		 7849 /* fall through */
7850 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7851 rpc_restart_call_prepare(task);
2050f0cc
AA		 7852 return;
7853 }
2050f0cc
AA		 7854 dprintk("<-- %s\n", __func__);
7855}
7856
17280175 7857static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7858 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7859 .rpc_call_done = nfs4_get_lease_time_done,
7860};
7861
7862int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7863{
7864 struct rpc_task *task;
7865 struct nfs4_get_lease_time_args args;
7866 struct nfs4_get_lease_time_res res = {
7867 .lr_fsinfo = fsinfo,
7868 };
7869 struct nfs4_get_lease_time_data data = {
7870 .args = &args,
7871 .res = &res,
7872 .clp = clp,
7873 };
7874 struct rpc_message msg = {
7875 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7876 .rpc_argp = &args,
7877 .rpc_resp = &res,
7878 };
7879 struct rpc_task_setup task_setup = {
7880 .rpc_client = clp->cl_rpcclient,
7881 .rpc_message = &msg,
7882 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7883 .callback_data = &data,
7884 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7885 };
7886 int status;
7887
a9c92d6b 7888 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7889 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7890 dprintk("--> %s\n", __func__);
7891 task = rpc_run_task(&task_setup);
7892
7893 if (IS_ERR(task))
7894 status = PTR_ERR(task);
7895 else {
7896 status = task->tk_status;
7897 rpc_put_task(task);
7898 }
7899 dprintk("<-- %s return %d\n", __func__, status);
7900
7901 return status;
7902}
7903
fc931582
AA		 7904/*
7905 * Initialize the values to be used by the client in CREATE_SESSION
7906 * If nfs4_init_session set the fore channel request and response sizes,
7907 * use them.
7908 *
7909 * Set the back channel max_resp_sz_cached to zero to force the client to
7910 * always set csa_cachethis to FALSE because the current implementation
7911 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7912 */
6b26cc8c
CL		 7913static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
7914 struct rpc_clnt *clnt)
fc931582 7915{
18aad3d5 7916 unsigned int max_rqst_sz, max_resp_sz;
6b26cc8c 7917 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
18aad3d5
AA		 7918
7919 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7920 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7921
fc931582 7922 /* Fore channel attributes */
18aad3d5
AA		 7923 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7924 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7925 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7926 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7927
7928 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7929 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7930 __func__,
7931 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7932 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7933
7934 /* Back channel attributes */
6b26cc8c
CL		 7935 args->bc_attrs.max_rqst_sz = max_bc_payload;
7936 args->bc_attrs.max_resp_sz = max_bc_payload;
fc931582
AA		 7937 args->bc_attrs.max_resp_sz_cached = 0;
7938 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5405fc44 7939 args->bc_attrs.max_reqs = min_t(unsigned short, max_session_cb_slots, 1);
fc931582
AA		 7940
7941 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7942 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7943 __func__,
7944 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7945 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7946 args->bc_attrs.max_reqs);
7947}
7948
79969dd1
TM		 7949static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7950 struct nfs41_create_session_res *res)
8d35301d 7951{
43c2e885 7952 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7953 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7954
43c2e885
BF		 7955 if (rcvd->max_resp_sz > sent->max_resp_sz)
7956 return -EINVAL;
7957 /*
7958 * Our requested max_ops is the minimum we need; we're not
7959 * prepared to break up compounds into smaller pieces than that.
7960 * So, no point even trying to continue if the server won't
7961 * cooperate:
7962 */
7963 if (rcvd->max_ops < sent->max_ops)
7964 return -EINVAL;
7965 if (rcvd->max_reqs == 0)
7966 return -EINVAL;
b4b9a0c1
VG		 7967 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7968 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7969 return 0;
8d35301d
AA		 7970}
7971
79969dd1
TM		 7972static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7973 struct nfs41_create_session_res *res)
43c2e885
BF		 7974{
7975 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7976 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7977
b1c0df5f
TM		 7978 if (!(res->flags & SESSION4_BACK_CHAN))
7979 goto out;
43c2e885
BF		 7980 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7981 return -EINVAL;
7982 if (rcvd->max_resp_sz < sent->max_resp_sz)
7983 return -EINVAL;
7984 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7985 return -EINVAL;
5405fc44 7986 if (rcvd->max_ops > sent->max_ops)
43c2e885 7987 return -EINVAL;
5405fc44 7988 if (rcvd->max_reqs > sent->max_reqs)
43c2e885 7989 return -EINVAL;
b1c0df5f 7990out:
43c2e885
BF		 7991 return 0;
7992}
8d35301d 7993
8d35301d 7994static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7995 struct nfs41_create_session_res *res)
8d35301d 7996{
43c2e885 7997 int ret;
8d35301d 7998
79969dd1 7999 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 8000 if (ret)
8001 return ret;
79969dd1
TM		 8002 return nfs4_verify_back_channel_attrs(args, res);
8003}
8004
8005static void nfs4_update_session(struct nfs4_session *session,
8006 struct nfs41_create_session_res *res)
8007{
8008 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 8009 /* Mark client id and session as being confirmed */
8010 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
8011 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 8012 session->flags = res->flags;
8013 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 8014 if (res->flags & SESSION4_BACK_CHAN)
8015 memcpy(&session->bc_attrs, &res->bc_attrs,
8016 sizeof(session->bc_attrs));
8d35301d
AA		 8017}
8018
848f5bda
TM		 8019static int _nfs4_proc_create_session(struct nfs_client *clp,
8020 struct rpc_cred *cred)
fc931582
AA		 8021{
8022 struct nfs4_session *session = clp->cl_session;
8023 struct nfs41_create_session_args args = {
8024 .client = clp,
79969dd1
TM		 8025 .clientid = clp->cl_clientid,
8026 .seqid = clp->cl_seqid,
fc931582
AA		 8027 .cb_program = NFS4_CALLBACK,
8028 };
79969dd1
TM		 8029 struct nfs41_create_session_res res;
8030
fc931582
AA		 8031 struct rpc_message msg = {
8032 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
8033 .rpc_argp = &args,
8034 .rpc_resp = &res,
848f5bda 8035 .rpc_cred = cred,
fc931582
AA		 8036 };
8037 int status;
8038
6b26cc8c 8039 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
0f91421e 8040 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 8041
1bd714f2 8042 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 8043 trace_nfs4_create_session(clp, status);
fc931582 8044
b519d408
TM		 8045 switch (status) {
8046 case -NFS4ERR_STALE_CLIENTID:
8047 case -NFS4ERR_DELAY:
8048 case -ETIMEDOUT:
8049 case -EACCES:
8050 case -EAGAIN:
8051 goto out;
8052 };
8053
8054 clp->cl_seqid++;
43095d39 8055 if (!status) {
8d35301d 8056 /* Verify the session's negotiated channel_attrs values */
79969dd1 8057 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 8058 /* Increment the clientid slot sequence id */
79969dd1
TM		 8059 if (status)
8060 goto out;
8061 nfs4_update_session(session, &res);
fc931582 8062 }
79969dd1 8063out:
fc931582
AA		 8064 return status;
8065}
8066
8067/*
8068 * Issues a CREATE_SESSION operation to the server.
8069 * It is the responsibility of the caller to verify the session is
8070 * expired before calling this routine.
8071 */
848f5bda 8072int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 8073{
8074 int status;
8075 unsigned *ptr;
fc931582
AA		 8076 struct nfs4_session *session = clp->cl_session;
8077
8078 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
8079
848f5bda 8080 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 8081 if (status)
8082 goto out;
8083
aacd5537
AA		 8084 /* Init or reset the session slot tables */
8085 status = nfs4_setup_session_slot_tables(session);
8086 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 8087 if (status)
8088 goto out;
8089
8090 ptr = (unsigned *)&session->sess_id.data[0];
8091 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
8092 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 8093out:
8094 dprintk("<-- %s\n", __func__);
8095 return status;
8096}
8097
0f3e66c6
AA		 8098/*
8099 * Issue the over-the-wire RPC DESTROY_SESSION.
8100 * The caller must serialize access to this routine.
8101 */
848f5bda
TM		 8102int nfs4_proc_destroy_session(struct nfs4_session *session,
8103 struct rpc_cred *cred)
0f3e66c6 8104{
848f5bda
TM		 8105 struct rpc_message msg = {
8106 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
8107 .rpc_argp = session,
8108 .rpc_cred = cred,
8109 };
0f3e66c6 8110 int status = 0;
0f3e66c6
AA		 8111
8112 dprintk("--> nfs4_proc_destroy_session\n");
8113
8114 /* session is still being setup */
e11259f9
TM		 8115 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
8116 return 0;
0f3e66c6 8117
1bd714f2 8118 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 8119 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 8120
8121 if (status)
08106ac7 8122 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 8123 "Session has been destroyed regardless...\n", status);
8124
8125 dprintk("<-- nfs4_proc_destroy_session\n");
8126 return status;
8127}
8128
fc01cea9
AA		 8129/*
8130 * Renew the cl_session lease.
8131 */
d5f8d3fe
TM		 8132struct nfs4_sequence_data {
8133 struct nfs_client *clp;
8134 struct nfs4_sequence_args args;
8135 struct nfs4_sequence_res res;
8136};
8137
dc96aef9
AB		 8138static void nfs41_sequence_release(void *data)
8139{
d5f8d3fe
TM		 8140 struct nfs4_sequence_data *calldata = data;
8141 struct nfs_client *clp = calldata->clp;
dc96aef9 8142
7135840f
AB		 8143 if (atomic_read(&clp->cl_count) > 1)
8144 nfs4_schedule_state_renewal(clp);
8145 nfs_put_client(clp);
d5f8d3fe 8146 kfree(calldata);
dc96aef9
AB		 8147}
8148
aa5190d0
TM		 8149static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8150{
8151 switch(task->tk_status) {
8152 case -NFS4ERR_DELAY:
aa5190d0
TM		 8153 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8154 return -EAGAIN;
8155 default:
0400a6b0 8156 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 8157 }
8158 return 0;
8159}
8160
dc96aef9 8161static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 8162{
d5f8d3fe
TM		 8163 struct nfs4_sequence_data *calldata = data;
8164 struct nfs_client *clp = calldata->clp;
fc01cea9 8165
14516c3a
TM		 8166 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
8167 return;
fc01cea9 8168
c6d01c6f 8169 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 8170 if (task->tk_status < 0) {
8171 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 8172 if (atomic_read(&clp->cl_count) == 1)
8173 goto out;
fc01cea9 8174
aa5190d0
TM		 8175 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
8176 rpc_restart_call_prepare(task);
fc01cea9
AA		 8177 return;
8178 }
8179 }
fc01cea9 8180 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 8181out:
fc01cea9
AA		 8182 dprintk("<-- %s\n", __func__);
8183}
8184
8185static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
8186{
d5f8d3fe
TM		 8187 struct nfs4_sequence_data *calldata = data;
8188 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 8189 struct nfs4_sequence_args *args;
8190 struct nfs4_sequence_res *res;
8191
fc01cea9
AA		 8192 args = task->tk_msg.rpc_argp;
8193 res = task->tk_msg.rpc_resp;
8194
d9afbd1b 8195 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 8196}
8197
8198static const struct rpc_call_ops nfs41_sequence_ops = {
8199 .rpc_call_done = nfs41_sequence_call_done,
8200 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 8201 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 8202};
8203
8fe72bac
TM		 8204static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
8205 struct rpc_cred *cred,
8206 bool is_privileged)
fc01cea9 8207{
d5f8d3fe 8208 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 8209 struct rpc_message msg = {
8210 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
8211 .rpc_cred = cred,
8212 };
71ac6da9
TM		 8213 struct rpc_task_setup task_setup_data = {
8214 .rpc_client = clp->cl_rpcclient,
8215 .rpc_message = &msg,
8fe72bac 8216 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 8217 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 8218 };
fc01cea9 8219
7135840f 8220 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 8221 return ERR_PTR(-EIO);
dfb4f309 8222 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 8223 if (calldata == NULL) {
7135840f 8224 nfs_put_client(clp);
71ac6da9 8225 return ERR_PTR(-ENOMEM);
fc01cea9 8226 }
a9c92d6b 8227 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 8228 if (is_privileged)
8229 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 8230 msg.rpc_argp = &calldata->args;
8231 msg.rpc_resp = &calldata->res;
8232 calldata->clp = clp;
71ac6da9 8233 task_setup_data.callback_data = calldata;
fc01cea9 8234
71ac6da9
TM		 8235 return rpc_run_task(&task_setup_data);
8236}
8237
2f60ea6b 8238static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 8239{
8240 struct rpc_task *task;
8241 int ret = 0;
8242
2f60ea6b 8243 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 8244 return -EAGAIN;
8fe72bac 8245 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 8246 if (IS_ERR(task))
8247 ret = PTR_ERR(task);
8248 else
bf294b41 8249 rpc_put_task_async(task);
71ac6da9
TM		 8250 dprintk("<-- %s status=%d\n", __func__, ret);
8251 return ret;
8252}
8253
8254static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
8255{
8256 struct rpc_task *task;
8257 int ret;
8258
8fe72bac 8259 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 8260 if (IS_ERR(task)) {
8261 ret = PTR_ERR(task);
8262 goto out;
8263 }
8264 ret = rpc_wait_for_completion_task(task);
be824167 8265 if (!ret)
71ac6da9
TM		 8266 ret = task->tk_status;
8267 rpc_put_task(task);
8268out:
8269 dprintk("<-- %s status=%d\n", __func__, ret);
8270 return ret;
fc01cea9
AA		 8271}
8272
fce5c838
RL		 8273struct nfs4_reclaim_complete_data {
8274 struct nfs_client *clp;
8275 struct nfs41_reclaim_complete_args arg;
8276 struct nfs41_reclaim_complete_res res;
8277};
8278
8279static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
8280{
8281 struct nfs4_reclaim_complete_data *calldata = data;
8282
d9afbd1b
TM		 8283 nfs41_setup_sequence(calldata->clp->cl_session,
8284 &calldata->arg.seq_args,
8285 &calldata->res.seq_res,
8286 task);
fce5c838
RL		 8287}
8288
aa5190d0
TM		 8289static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8290{
8291 switch(task->tk_status) {
8292 case 0:
8293 case -NFS4ERR_COMPLETE_ALREADY:
8294 case -NFS4ERR_WRONG_CRED: /* What to do here? */
8295 break;
8296 case -NFS4ERR_DELAY:
aa5190d0 8297 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 8298 /* fall through */
8299 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 8300 return -EAGAIN;
8301 default:
0400a6b0 8302 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 8303 }
8304 return 0;
8305}
8306
fce5c838
RL		 8307static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
8308{
8309 struct nfs4_reclaim_complete_data *calldata = data;
8310 struct nfs_client *clp = calldata->clp;
8311 struct nfs4_sequence_res *res = &calldata->res.seq_res;
8312
8313 dprintk("--> %s\n", __func__);
14516c3a
TM		 8314 if (!nfs41_sequence_done(task, res))
8315 return;
fce5c838 8316
c6d01c6f 8317 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 8318 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
8319 rpc_restart_call_prepare(task);
8320 return;
8321 }
fce5c838
RL		 8322 dprintk("<-- %s\n", __func__);
8323}
8324
8325static void nfs4_free_reclaim_complete_data(void *data)
8326{
8327 struct nfs4_reclaim_complete_data *calldata = data;
8328
8329 kfree(calldata);
8330}
8331
8332static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
8333 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
8334 .rpc_call_done = nfs4_reclaim_complete_done,
8335 .rpc_release = nfs4_free_reclaim_complete_data,
8336};
8337
8338/*
8339 * Issue a global reclaim complete.
8340 */
965e9c23
TM		 8341static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
8342 struct rpc_cred *cred)
fce5c838
RL		 8343{
8344 struct nfs4_reclaim_complete_data *calldata;
8345 struct rpc_task *task;
8346 struct rpc_message msg = {
8347 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 8348 .rpc_cred = cred,
fce5c838
RL		 8349 };
8350 struct rpc_task_setup task_setup_data = {
8351 .rpc_client = clp->cl_rpcclient,
8352 .rpc_message = &msg,
8353 .callback_ops = &nfs4_reclaim_complete_call_ops,
8354 .flags = RPC_TASK_ASYNC,
8355 };
8356 int status = -ENOMEM;
8357
8358 dprintk("--> %s\n", __func__);
8535b2be 8359 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 8360 if (calldata == NULL)
8361 goto out;
8362 calldata->clp = clp;
8363 calldata->arg.one_fs = 0;
fce5c838 8364
a9c92d6b 8365 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 8366 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 8367 msg.rpc_argp = &calldata->arg;
8368 msg.rpc_resp = &calldata->res;
8369 task_setup_data.callback_data = calldata;
8370 task = rpc_run_task(&task_setup_data);
acf82b85 8371 if (IS_ERR(task)) {
fce5c838 8372 status = PTR_ERR(task);
acf82b85
DC		 8373 goto out;
8374 }
c34c32ea
AA		 8375 status = nfs4_wait_for_completion_rpc_task(task);
8376 if (status == 0)
8377 status = task->tk_status;
fce5c838 8378 rpc_put_task(task);
acf82b85 8379 return 0;
fce5c838
RL		 8380out:
8381 dprintk("<-- %s status=%d\n", __func__, status);
8382 return status;
8383}
b1f69b75
AA		 8384
8385static void
8386nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
8387{
8388 struct nfs4_layoutget *lgp = calldata;
c31663d4 8389 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 8390 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 8391
8392 dprintk("--> %s\n", __func__);
183d9e7b
JL		 8393 nfs41_setup_sequence(session, &lgp->args.seq_args,
8394 &lgp->res.seq_res, task);
8395 dprintk("<-- %s\n", __func__);
b1f69b75
AA		 8396}
8397
8398static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
8399{
8400 struct nfs4_layoutget *lgp = calldata;
183d9e7b
JL		 8401
8402 dprintk("--> %s\n", __func__);
2e80dbe7 8403 nfs41_sequence_process(task, &lgp->res.seq_res);
183d9e7b
JL		 8404 dprintk("<-- %s\n", __func__);
8405}
8406
8407static int
8408nfs4_layoutget_handle_exception(struct rpc_task *task,
8409 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
8410{
ee314c2a
TM		 8411 struct inode *inode = lgp->args.inode;
8412 struct nfs_server *server = NFS_SERVER(inode);
8413 struct pnfs_layout_hdr *lo;
e85d7ee4
TM		 8414 int nfs4err = task->tk_status;
8415 int err, status = 0;
f7db0b28 8416 LIST_HEAD(head);
b1f69b75 8417
ed7e5423 8418 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 8419
e85d7ee4 8420 switch (nfs4err) {
b1f69b75 8421 case 0:
ee314c2a 8422 goto out;
7c1e6e58
PT		 8423
8424 /*
8425 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
8426 * on the file. set tk_status to -ENODATA to tell upper layer to
8427 * retry go inband.
8428 */
8429 case -NFS4ERR_LAYOUTUNAVAILABLE:
183d9e7b 8430 status = -ENODATA;
7c1e6e58 8431 goto out;
21b874c8
TM		 8432 /*
8433 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
8434 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
8435 */
8436 case -NFS4ERR_BADLAYOUT:
183d9e7b
JL		 8437 status = -EOVERFLOW;
8438 goto out;
ed7e5423
BH		 8439 /*
8440 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
21b874c8
TM		 8441 * (or clients) writing to the same RAID stripe except when
8442 * the minlength argument is 0 (see RFC5661 section 18.43.3).
183d9e7b
JL		 8443 *
8444 * Treat it like we would RECALLCONFLICT -- we retry for a little
8445 * while, and then eventually give up.
ed7e5423 8446 */
b1f69b75 8447 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b
JL		 8448 if (lgp->args.minlength == 0) {
8449 status = -EOVERFLOW;
8450 goto out;
ed7e5423 8451 }
e85d7ee4
TM		 8452 status = -EBUSY;
8453 break;
183d9e7b 8454 case -NFS4ERR_RECALLCONFLICT:
183d9e7b 8455 status = -ERECALLCONFLICT;
e85d7ee4 8456 break;
26f47443
TM		 8457 case -NFS4ERR_DELEG_REVOKED:
8458 case -NFS4ERR_ADMIN_REVOKED:
ee314c2a
TM		 8459 case -NFS4ERR_EXPIRED:
8460 case -NFS4ERR_BAD_STATEID:
183d9e7b 8461 exception->timeout = 0;
ee314c2a 8462 spin_lock(&inode->i_lock);
f7db0b28
TM		 8463 lo = NFS_I(inode)->layout;
8464 /* If the open stateid was bad, then recover it. */
8465 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
8466 nfs4_stateid_match_other(&lgp->args.stateid,
2259f960 8467 &lgp->args.ctx->state->stateid)) {
ee314c2a 8468 spin_unlock(&inode->i_lock);
183d9e7b 8469 exception->state = lgp->args.ctx->state;
26f47443 8470 exception->stateid = &lgp->args.stateid;
2259f960
TM		 8471 break;
8472 }
f7db0b28
TM		 8473
8474 /*
8475 * Mark the bad layout state as invalid, then retry
8476 */
668f455d 8477 pnfs_mark_layout_stateid_invalid(lo, &head);
f7db0b28
TM		 8478 spin_unlock(&inode->i_lock);
8479 pnfs_free_lseg_list(&head);
8480 status = -EAGAIN;
8481 goto out;
b1f69b75 8482 }
183d9e7b 8483
e85d7ee4
TM		 8484 err = nfs4_handle_exception(server, nfs4err, exception);
8485 if (!status) {
8486 if (exception->retry)
8487 status = -EAGAIN;
8488 else
8489 status = err;
8490 }
ee314c2a 8491out:
b1f69b75 8492 dprintk("<-- %s\n", __func__);
183d9e7b 8493 return status;
b1f69b75
AA		 8494}
8495
8554116e
IK		 8496static size_t max_response_pages(struct nfs_server *server)
8497{
8498 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
8499 return nfs_page_array_len(0, max_resp_sz);
8500}
8501
8502static void nfs4_free_pages(struct page **pages, size_t size)
8503{
8504 int i;
8505
8506 if (!pages)
8507 return;
8508
8509 for (i = 0; i < size; i++) {
8510 if (!pages[i])
8511 break;
8512 __free_page(pages[i]);
8513 }
8514 kfree(pages);
8515}
8516
8517static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
8518{
8519 struct page **pages;
8520 int i;
8521
8522 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
8523 if (!pages) {
8524 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
8525 return NULL;
8526 }
8527
8528 for (i = 0; i < size; i++) {
8529 pages[i] = alloc_page(gfp_flags);
8530 if (!pages[i]) {
8531 dprintk("%s: failed to allocate page\n", __func__);
8532 nfs4_free_pages(pages, size);
8533 return NULL;
8534 }
8535 }
8536
8537 return pages;
8538}
8539
b1f69b75
AA		 8540static void nfs4_layoutget_release(void *calldata)
8541{
8542 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 8543 struct inode *inode = lgp->args.inode;
8544 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8545 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8546
8547 dprintk("--> %s\n", __func__);
8554116e 8548 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 8549 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 8550 put_nfs_open_context(lgp->args.ctx);
8551 kfree(calldata);
8552 dprintk("<-- %s\n", __func__);
8553}
8554
8555static const struct rpc_call_ops nfs4_layoutget_call_ops = {
8556 .rpc_call_prepare = nfs4_layoutget_prepare,
8557 .rpc_call_done = nfs4_layoutget_done,
8558 .rpc_release = nfs4_layoutget_release,
8559};
8560
a0b0a6e3 8561struct pnfs_layout_segment *
183d9e7b 8562nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags)
b1f69b75 8563{
a47970ff
WAA		 8564 struct inode *inode = lgp->args.inode;
8565 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8566 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8567 struct rpc_task *task;
8568 struct rpc_message msg = {
8569 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
8570 .rpc_argp = &lgp->args,
8571 .rpc_resp = &lgp->res,
6ab59344 8572 .rpc_cred = lgp->cred,
b1f69b75
AA		 8573 };
8574 struct rpc_task_setup task_setup_data = {
8575 .rpc_client = server->client,
8576 .rpc_message = &msg,
8577 .callback_ops = &nfs4_layoutget_call_ops,
8578 .callback_data = lgp,
8579 .flags = RPC_TASK_ASYNC,
8580 };
a0b0a6e3 8581 struct pnfs_layout_segment *lseg = NULL;
bc23676c
TM		 8582 struct nfs4_exception exception = {
8583 .inode = inode,
8584 .timeout = *timeout,
8585 };
b1f69b75
AA		 8586 int status = 0;
8587
8588 dprintk("--> %s\n", __func__);
8589
4bd5a980
PT		 8590 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
8591 pnfs_get_layout_hdr(NFS_I(inode)->layout);
8592
8554116e
IK		 8593 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
8594 if (!lgp->args.layout.pages) {
8595 nfs4_layoutget_release(lgp);
a0b0a6e3 8596 return ERR_PTR(-ENOMEM);
8554116e
IK		 8597 }
8598 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
8599
35124a09 8600 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 8601 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 8602 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 8603
b1f69b75
AA		 8604 task = rpc_run_task(&task_setup_data);
8605 if (IS_ERR(task))
a0b0a6e3 8606 return ERR_CAST(task);
b1f69b75 8607 status = nfs4_wait_for_completion_rpc_task(task);
183d9e7b
JL		 8608 if (status == 0) {
8609 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
8610 *timeout = exception.timeout;
8611 }
8612
1037e6ea
TM		 8613 trace_nfs4_layoutget(lgp->args.ctx,
8614 &lgp->args.range,
8615 &lgp->res.range,
48c9579a 8616 &lgp->res.stateid,
1037e6ea 8617 status);
183d9e7b 8618
085b7a45
WAA		 8619 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8620 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 8621 lseg = pnfs_layout_process(lgp);
2e80dbe7 8622 nfs4_sequence_free_slot(&lgp->res.seq_res);
b1f69b75
AA		 8623 rpc_put_task(task);
8624 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 8625 if (status)
8626 return ERR_PTR(status);
8627 return lseg;
b1f69b75
AA		 8628}
8629
cbe82603
BH		 8630static void
8631nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8632{
8633 struct nfs4_layoutreturn *lrp = calldata;
8634
8635 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 8636 nfs41_setup_sequence(lrp->clp->cl_session,
8637 &lrp->args.seq_args,
8638 &lrp->res.seq_res,
8639 task);
cbe82603
BH		 8640}
8641
8642static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8643{
8644 struct nfs4_layoutreturn *lrp = calldata;
8645 struct nfs_server *server;
8646
8647 dprintk("--> %s\n", __func__);
8648
2e80dbe7 8649 if (!nfs41_sequence_process(task, &lrp->res.seq_res))
cbe82603
BH		 8650 return;
8651
8652 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 8653 switch (task->tk_status) {
8654 default:
8655 task->tk_status = 0;
8656 case 0:
8657 break;
8658 case -NFS4ERR_DELAY:
8478eaa1 8659 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 8660 break;
2e80dbe7 8661 nfs4_sequence_free_slot(&lrp->res.seq_res);
d00c5d43 8662 rpc_restart_call_prepare(task);
cbe82603
BH		 8663 return;
8664 }
cbe82603
BH		 8665 dprintk("<-- %s\n", __func__);
8666}
8667
8668static void nfs4_layoutreturn_release(void *calldata)
8669{
8670 struct nfs4_layoutreturn *lrp = calldata;
849b286f 8671 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 8672
8673 dprintk("--> %s\n", __func__);
2a974425 8674 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range,
68f74479 8675 lrp->res.lrs_present ? &lrp->res.stateid : NULL);
2e80dbe7 8676 nfs4_sequence_free_slot(&lrp->res.seq_res);
4d796d75
TM		 8677 if (lrp->ld_private.ops && lrp->ld_private.ops->free)
8678 lrp->ld_private.ops->free(&lrp->ld_private);
2f065ddb
TM		 8679 pnfs_put_layout_hdr(lrp->args.layout);
8680 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 8681 kfree(calldata);
8682 dprintk("<-- %s\n", __func__);
8683}
8684
8685static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8686 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8687 .rpc_call_done = nfs4_layoutreturn_done,
8688 .rpc_release = nfs4_layoutreturn_release,
8689};
8690
6c16605d 8691int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 8692{
8693 struct rpc_task *task;
8694 struct rpc_message msg = {
8695 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8696 .rpc_argp = &lrp->args,
8697 .rpc_resp = &lrp->res,
9556000d 8698 .rpc_cred = lrp->cred,
cbe82603
BH		 8699 };
8700 struct rpc_task_setup task_setup_data = {
1771c577 8701 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8702 .rpc_message = &msg,
8703 .callback_ops = &nfs4_layoutreturn_call_ops,
8704 .callback_data = lrp,
8705 };
6c16605d 8706 int status = 0;
cbe82603 8707
99ade3c7
AE		 8708 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
8709 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
8710 &task_setup_data.rpc_client, &msg);
8711
cbe82603 8712 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8713 if (!sync) {
8714 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8715 if (!lrp->inode) {
8716 nfs4_layoutreturn_release(lrp);
8717 return -EAGAIN;
8718 }
8719 task_setup_data.flags |= RPC_TASK_ASYNC;
8720 }
a9c92d6b 8721 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8722 task = rpc_run_task(&task_setup_data);
8723 if (IS_ERR(task))
8724 return PTR_ERR(task);
5a0ec8ac
TM		 8725 if (sync)
8726 status = task->tk_status;
48c9579a 8727 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
cbe82603
BH		 8728 dprintk("<-- %s status=%d\n", __func__, status);
8729 rpc_put_task(task);
8730 return status;
8731}
8732
b1f69b75 8733static int
cd5875fe
TM		 8734_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8735 struct pnfs_device *pdev,
8736 struct rpc_cred *cred)
b1f69b75
AA		 8737{
8738 struct nfs4_getdeviceinfo_args args = {
8739 .pdev = pdev,
4e590803
TM		 8740 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8741 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8742 };
8743 struct nfs4_getdeviceinfo_res res = {
8744 .pdev = pdev,
8745 };
8746 struct rpc_message msg = {
8747 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8748 .rpc_argp = &args,
8749 .rpc_resp = &res,
cd5875fe 8750 .rpc_cred = cred,
b1f69b75
AA		 8751 };
8752 int status;
8753
8754 dprintk("--> %s\n", __func__);
7c513058 8755 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8756 if (res.notification & ~args.notify_types)
8757 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8758 if (res.notification != args.notify_types)
8759 pdev->nocache = 1;
4e590803 8760
b1f69b75
AA		 8761 dprintk("<-- %s status=%d\n", __func__, status);
8762
8763 return status;
8764}
8765
cd5875fe
TM		 8766int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8767 struct pnfs_device *pdev,
8768 struct rpc_cred *cred)
b1f69b75
AA		 8769{
8770 struct nfs4_exception exception = { };
8771 int err;
8772
8773 do {
8774 err = nfs4_handle_exception(server,
cd5875fe 8775 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8776 &exception);
8777 } while (exception.retry);
8778 return err;
8779}
8780EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8781
863a3c6c
AA		 8782static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8783{
8784 struct nfs4_layoutcommit_data *data = calldata;
8785 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 8786 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 8787
d9afbd1b
TM		 8788 nfs41_setup_sequence(session,
8789 &data->args.seq_args,
8790 &data->res.seq_res,
8791 task);
863a3c6c
AA		 8792}
8793
8794static void
8795nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8796{
8797 struct nfs4_layoutcommit_data *data = calldata;
8798 struct nfs_server *server = NFS_SERVER(data->args.inode);
8799
6ba7db34 8800 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8801 return;
8802
8803 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8804 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8805 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8806 case -NFS4ERR_BADLAYOUT: /* no layout */
8807 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8808 task->tk_status = 0;
e59d27e0 8809 case 0:
e59d27e0
TM		 8810 break;
8811 default:
8478eaa1 8812 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8813 rpc_restart_call_prepare(task);
8814 return;
8815 }
8816 }
863a3c6c
AA		 8817}
8818
8819static void nfs4_layoutcommit_release(void *calldata)
8820{
8821 struct nfs4_layoutcommit_data *data = calldata;
8822
db29c089 8823 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8824 nfs_post_op_update_inode_force_wcc(data->args.inode,
8825 data->res.fattr);
863a3c6c 8826 put_rpccred(data->cred);
472e2594 8827 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8828 kfree(data);
8829}
8830
8831static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8832 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8833 .rpc_call_done = nfs4_layoutcommit_done,
8834 .rpc_release = nfs4_layoutcommit_release,
8835};
8836
8837int
ef311537 8838nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8839{
8840 struct rpc_message msg = {
8841 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8842 .rpc_argp = &data->args,
8843 .rpc_resp = &data->res,
8844 .rpc_cred = data->cred,
8845 };
8846 struct rpc_task_setup task_setup_data = {
8847 .task = &data->task,
8848 .rpc_client = NFS_CLIENT(data->args.inode),
8849 .rpc_message = &msg,
8850 .callback_ops = &nfs4_layoutcommit_ops,
8851 .callback_data = data,
863a3c6c
AA		 8852 };
8853 struct rpc_task *task;
8854 int status = 0;
8855
b4839ebe
KM		 8856 dprintk("NFS: initiating layoutcommit call. sync %d "
8857 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8858 data->args.lastbytewritten,
8859 data->args.inode->i_ino);
8860
472e2594
TM		 8861 if (!sync) {
8862 data->inode = nfs_igrab_and_active(data->args.inode);
8863 if (data->inode == NULL) {
8864 nfs4_layoutcommit_release(data);
8865 return -EAGAIN;
8866 }
8867 task_setup_data.flags = RPC_TASK_ASYNC;
8868 }
a9c92d6b 8869 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8870 task = rpc_run_task(&task_setup_data);
8871 if (IS_ERR(task))
8872 return PTR_ERR(task);
472e2594
TM		 8873 if (sync)
8874 status = task->tk_status;
48c9579a 8875 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
863a3c6c
AA		 8876 dprintk("%s: status %d\n", __func__, status);
8877 rpc_put_task(task);
8878 return status;
8879}
fca78d6d 8880
97431204
AA		 8881/**
8882 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8883 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8884 */
fca78d6d
BS		 8885static int
8886_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8887 struct nfs_fsinfo *info,
8888 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8889{
8890 struct nfs41_secinfo_no_name_args args = {
8891 .style = SECINFO_STYLE_CURRENT_FH,
8892 };
8893 struct nfs4_secinfo_res res = {
8894 .flavors = flavors,
8895 };
8896 struct rpc_message msg = {
8897 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8898 .rpc_argp = &args,
8899 .rpc_resp = &res,
8900 };
b1b3e136 8901 struct rpc_clnt *clnt = server->client;
7cb852df 8902 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8903 int status;
8904
8905 if (use_integrity) {
8906 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8907 cred = nfs4_get_clid_cred(server->nfs_client);
8908 msg.rpc_cred = cred;
b1b3e136
WAA		 8909 }
8910
8911 dprintk("--> %s\n", __func__);
8912 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8913 &res.seq_res, 0);
8914 dprintk("<-- %s status=%d\n", __func__, status);
8915
7cb852df
WAA		 8916 if (cred)
8917 put_rpccred(cred);
b1b3e136
WAA		 8918
8919 return status;
fca78d6d
BS		 8920}
8921
8922static int
8923nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8924 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8925{
8926 struct nfs4_exception exception = { };
8927 int err;
8928 do {
b1b3e136
WAA		 8929 /* first try using integrity protection */
8930 err = -NFS4ERR_WRONGSEC;
8931
8932 /* try to use integrity protection with machine cred */
8933 if (_nfs4_is_integrity_protected(server->nfs_client))
8934 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8935 flavors, true);
8936
8937 /*
8938 * if unable to use integrity protection, or SECINFO with
8939 * integrity protection returns NFS4ERR_WRONGSEC (which is
8940 * disallowed by spec, but exists in deployed servers) use
8941 * the current filesystem's rpc_client and the user cred.
8942 */
8943 if (err == -NFS4ERR_WRONGSEC)
8944 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8945 flavors, false);
8946
fca78d6d
BS		 8947 switch (err) {
8948 case 0:
8949 case -NFS4ERR_WRONGSEC:
78b19bae 8950 case -ENOTSUPP:
05e9cfb4 8951 goto out;
fca78d6d
BS		 8952 default:
8953 err = nfs4_handle_exception(server, err, &exception);
8954 }
8955 } while (exception.retry);
05e9cfb4 8956out:
fca78d6d
BS		 8957 return err;
8958}
8959
8960static int
8961nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8962 struct nfs_fsinfo *info)
8963{
8964 int err;
8965 struct page *page;
367156d9 8966 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8967 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8968 struct nfs4_secinfo4 *secinfo;
8969 int i;
fca78d6d
BS		 8970
8971 page = alloc_page(GFP_KERNEL);
8972 if (!page) {
8973 err = -ENOMEM;
8974 goto out;
8975 }
8976
8977 flavors = page_address(page);
8978 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8979
8980 /*
8981 * Fall back on "guess and check" method if
8982 * the server doesn't support SECINFO_NO_NAME
8983 */
78b19bae 8984 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8985 err = nfs4_find_root_sec(server, fhandle, info);
8986 goto out_freepage;
8987 }
8988 if (err)
8989 goto out_freepage;
8990
58a8cf12
WAA		 8991 for (i = 0; i < flavors->num_flavors; i++) {
8992 secinfo = &flavors->flavors[i];
8993
8994 switch (secinfo->flavor) {
8995 case RPC_AUTH_NULL:
8996 case RPC_AUTH_UNIX:
8997 case RPC_AUTH_GSS:
8998 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8999 &secinfo->flavor_info);
9000 break;
9001 default:
9002 flavor = RPC_AUTH_MAXFLAVOR;
9003 break;
9004 }
9005
4d4b69dd
WAA		 9006 if (!nfs_auth_info_match(&server->auth_info, flavor))
9007 flavor = RPC_AUTH_MAXFLAVOR;
9008
58a8cf12
WAA		 9009 if (flavor != RPC_AUTH_MAXFLAVOR) {
9010 err = nfs4_lookup_root_sec(server, fhandle,
9011 info, flavor);
9012 if (!err)
9013 break;
9014 }
9015 }
9016
9017 if (flavor == RPC_AUTH_MAXFLAVOR)
9018 err = -EPERM;
fca78d6d
BS		 9019
9020out_freepage:
9021 put_page(page);
9022 if (err == -EACCES)
9023 return -EPERM;
9024out:
9025 return err;
9026}
1cab0652 9027
ab7cb0df
TM		 9028static int _nfs41_test_stateid(struct nfs_server *server,
9029 nfs4_stateid *stateid,
9030 struct rpc_cred *cred)
7d974794
BS		 9031{
9032 int status;
9033 struct nfs41_test_stateid_args args = {
1cab0652 9034 .stateid = stateid,
7d974794
BS		 9035 };
9036 struct nfs41_test_stateid_res res;
9037 struct rpc_message msg = {
9038 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
9039 .rpc_argp = &args,
9040 .rpc_resp = &res,
ab7cb0df 9041 .rpc_cred = cred,
7d974794 9042 };
3787d506
WAA		 9043 struct rpc_clnt *rpc_client = server->client;
9044
9045 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9046 &rpc_client, &msg);
1cab0652 9047
38527b15 9048 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 9049 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 9050 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 9051 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 9052 &args.seq_args, &res.seq_res);
38527b15
CL		 9053 if (status != NFS_OK) {
9054 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 9055 return status;
38527b15
CL		 9056 }
9057 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 9058 return -res.status;
7d974794
BS		 9059}
9060
43912bbb
TM		 9061static void nfs4_handle_delay_or_session_error(struct nfs_server *server,
9062 int err, struct nfs4_exception *exception)
9063{
9064 exception->retry = 0;
9065 switch(err) {
9066 case -NFS4ERR_DELAY:
76e8a1bd 9067 case -NFS4ERR_RETRY_UNCACHED_REP:
43912bbb
TM		 9068 nfs4_handle_exception(server, err, exception);
9069 break;
9070 case -NFS4ERR_BADSESSION:
9071 case -NFS4ERR_BADSLOT:
9072 case -NFS4ERR_BAD_HIGH_SLOT:
9073 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
9074 case -NFS4ERR_DEADSESSION:
9075 nfs4_do_handle_exception(server, err, exception);
9076 }
9077}
9078
38527b15
CL		 9079/**
9080 * nfs41_test_stateid - perform a TEST_STATEID operation
9081 *
9082 * @server: server / transport on which to perform the operation
9083 * @stateid: state ID to test
ab7cb0df 9084 * @cred: credential
38527b15
CL		 9085 *
9086 * Returns NFS_OK if the server recognizes that "stateid" is valid.
9087 * Otherwise a negative NFS4ERR value is returned if the operation
9088 * failed or the state ID is not currently valid.
9089 */
ab7cb0df
TM		 9090static int nfs41_test_stateid(struct nfs_server *server,
9091 nfs4_stateid *stateid,
9092 struct rpc_cred *cred)
7d974794
BS		 9093{
9094 struct nfs4_exception exception = { };
9095 int err;
9096 do {
ab7cb0df 9097 err = _nfs41_test_stateid(server, stateid, cred);
43912bbb 9098 nfs4_handle_delay_or_session_error(server, err, &exception);
7d974794
BS		 9099 } while (exception.retry);
9100 return err;
9101}
9aeda35f 9102
7c1d5fae
TM		 9103struct nfs_free_stateid_data {
9104 struct nfs_server *server;
9105 struct nfs41_free_stateid_args args;
9aeda35f 9106 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 9107};
9108
9109static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
9110{
9111 struct nfs_free_stateid_data *data = calldata;
9112 nfs41_setup_sequence(nfs4_get_session(data->server),
9113 &data->args.seq_args,
9114 &data->res.seq_res,
9115 task);
9116}
9117
9118static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
9119{
9120 struct nfs_free_stateid_data *data = calldata;
9121
9122 nfs41_sequence_done(task, &data->res.seq_res);
9123
9124 switch (task->tk_status) {
9125 case -NFS4ERR_DELAY:
8478eaa1 9126 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 9127 rpc_restart_call_prepare(task);
9128 }
9129}
9130
9131static void nfs41_free_stateid_release(void *calldata)
9132{
9133 kfree(calldata);
9134}
9135
17f26b12 9136static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 9137 .rpc_call_prepare = nfs41_free_stateid_prepare,
9138 .rpc_call_done = nfs41_free_stateid_done,
9139 .rpc_release = nfs41_free_stateid_release,
9140};
9141
9142static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
f0b0bf88 9143 const nfs4_stateid *stateid,
ab7cb0df 9144 struct rpc_cred *cred,
7c1d5fae
TM		 9145 bool privileged)
9146{
9aeda35f
BS		 9147 struct rpc_message msg = {
9148 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 9149 .rpc_cred = cred,
9aeda35f 9150 };
7c1d5fae
TM		 9151 struct rpc_task_setup task_setup = {
9152 .rpc_client = server->client,
9153 .rpc_message = &msg,
9154 .callback_ops = &nfs41_free_stateid_ops,
9155 .flags = RPC_TASK_ASYNC,
9156 };
9157 struct nfs_free_stateid_data *data;
9aeda35f 9158
3787d506
WAA		 9159 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9160 &task_setup.rpc_client, &msg);
9161
38527b15 9162 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 9163 data = kmalloc(sizeof(*data), GFP_NOFS);
9164 if (!data)
9165 return ERR_PTR(-ENOMEM);
9166 data->server = server;
9167 nfs4_stateid_copy(&data->args.stateid, stateid);
9168
9169 task_setup.callback_data = data;
9170
9171 msg.rpc_argp = &data->args;
9172 msg.rpc_resp = &data->res;
76e8a1bd 9173 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
7c1d5fae
TM		 9174 if (privileged)
9175 nfs4_set_sequence_privileged(&data->args.seq_args);
9176
9177 return rpc_run_task(&task_setup);
9aeda35f
BS		 9178}
9179
38527b15
CL		 9180/**
9181 * nfs41_free_stateid - perform a FREE_STATEID operation
9182 *
9183 * @server: server / transport on which to perform the operation
9184 * @stateid: state ID to release
ab7cb0df 9185 * @cred: credential
f0b0bf88 9186 * @is_recovery: set to true if this call needs to be privileged
38527b15 9187 *
f0b0bf88 9188 * Note: this function is always asynchronous.
38527b15 9189 */
ab7cb0df 9190static int nfs41_free_stateid(struct nfs_server *server,
f0b0bf88
TM		 9191 const nfs4_stateid *stateid,
9192 struct rpc_cred *cred,
9193 bool is_recovery)
9aeda35f 9194{
7c1d5fae 9195 struct rpc_task *task;
7c1d5fae 9196
f0b0bf88 9197 task = _nfs41_free_stateid(server, stateid, cred, is_recovery);
7c1d5fae
TM		 9198 if (IS_ERR(task))
9199 return PTR_ERR(task);
7c1d5fae 9200 rpc_put_task(task);
f0b0bf88 9201 return 0;
9aeda35f 9202}
36281caa 9203
f1cdae87
JL		 9204static void
9205nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf 9206{
ab7cb0df 9207 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 9208
f0b0bf88 9209 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf 9210 nfs4_free_lock_state(server, lsp);
c8b2d0bf
TM		 9211}
9212
36281caa
TM		 9213static bool nfs41_match_stateid(const nfs4_stateid *s1,
9214 const nfs4_stateid *s2)
9215{
93b717fd
TM		 9216 if (s1->type != s2->type)
9217 return false;
9218
2d2f24ad 9219 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 9220 return false;
9221
2d2f24ad 9222 if (s1->seqid == s2->seqid)
36281caa 9223 return true;
2d2f24ad 9224 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 9225 return true;
9226
9227 return false;
9228}
9229
557134a3
AA		 9230#endif /* CONFIG_NFS_V4_1 */
9231
36281caa
TM		 9232static bool nfs4_match_stateid(const nfs4_stateid *s1,
9233 const nfs4_stateid *s2)
9234{
f597c537 9235 return nfs4_stateid_match(s1, s2);
36281caa
TM		 9236}
9237
9238
17280175 9239static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 9240 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 9241 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 9242 .recover_open = nfs4_open_reclaim,
9243 .recover_lock = nfs4_lock_reclaim,
591d71cb 9244 .establish_clid = nfs4_init_clientid,
05f4c350 9245 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 9246};
9247
591d71cb 9248#if defined(CONFIG_NFS_V4_1)
17280175 9249static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 9250 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9251 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9252 .recover_open = nfs4_open_reclaim,
9253 .recover_lock = nfs4_lock_reclaim,
4d643d1d 9254 .establish_clid = nfs41_init_clientid,
fce5c838 9255 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 9256 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 9257};
9258#endif /* CONFIG_NFS_V4_1 */
9259
17280175 9260static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 9261 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9262 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 9263 .recover_open = nfs40_open_expired,
591d71cb
AA		 9264 .recover_lock = nfs4_lock_expired,
9265 .establish_clid = nfs4_init_clientid,
9266};
9267
9268#if defined(CONFIG_NFS_V4_1)
17280175 9269static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 9270 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 9271 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 9272 .recover_open = nfs41_open_expired,
9273 .recover_lock = nfs41_lock_expired,
4d643d1d 9274 .establish_clid = nfs41_init_clientid,
1da177e4 9275};
591d71cb 9276#endif /* CONFIG_NFS_V4_1 */
1da177e4 9277
17280175 9278static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 9279 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 9280 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 9281 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 9282};
9283
9284#if defined(CONFIG_NFS_V4_1)
17280175 9285static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 9286 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 9287 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 9288 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 9289};
9290#endif
9291
ec011fe8 9292static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 9293 .get_locations = _nfs40_proc_get_locations,
44c99933 9294 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 9295};
9296
9297#if defined(CONFIG_NFS_V4_1)
9298static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 9299 .get_locations = _nfs41_proc_get_locations,
44c99933 9300 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 9301};
9302#endif /* CONFIG_NFS_V4_1 */
9303
97dc1359
TM		 9304static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
9305 .minor_version = 0,
39c6daae
TM		 9306 .init_caps = NFS_CAP_READDIRPLUS
9307 | NFS_CAP_ATOMIC_OPEN
39c6daae 9308 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 9309 .init_client = nfs40_init_client,
9310 .shutdown_client = nfs40_shutdown_client,
36281caa 9311 .match_stateid = nfs4_match_stateid,
fca78d6d 9312 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 9313 .free_lock_state = nfs4_release_lockowner,
45870d69 9314 .test_and_free_expired = nfs40_test_and_free_expired_stateid,
63f5f796 9315 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 9316 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 9317 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
9318 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
9319 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 9320 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 9321};
9322
9323#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 9324static struct nfs_seqid *
9325nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
9326{
9327 return NULL;
9328}
9329
97dc1359
TM		 9330static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
9331 .minor_version = 1,
39c6daae
TM		 9332 .init_caps = NFS_CAP_READDIRPLUS
9333 | NFS_CAP_ATOMIC_OPEN
3b66486c 9334 | NFS_CAP_POSIX_LOCK
49f9a0fa 9335 | NFS_CAP_STATEID_NFSV41
e983120e 9336 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 9337 .init_client = nfs41_init_client,
9338 .shutdown_client = nfs41_shutdown_client,
36281caa 9339 .match_stateid = nfs41_match_stateid,
fca78d6d 9340 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 9341 .free_lock_state = nfs41_free_lock_state,
45870d69 9342 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 9343 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 9344 .session_trunk = nfs4_test_session_trunk,
9915ea7e 9345 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 9346 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9347 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9348 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 9349 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 9350};
9351#endif
9352
42c2c424
SD		 9353#if defined(CONFIG_NFS_V4_2)
9354static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
9355 .minor_version = 2,
7017310a
BS		 9356 .init_caps = NFS_CAP_READDIRPLUS
9357 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 9358 | NFS_CAP_POSIX_LOCK
9359 | NFS_CAP_STATEID_NFSV41
e983120e 9360 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 9361 | NFS_CAP_ALLOCATE
2e72448b 9362 | NFS_CAP_COPY
624bd5b7 9363 | NFS_CAP_DEALLOCATE
6c5a0d89 9364 | NFS_CAP_SEEK
e5341f3a
PT		 9365 | NFS_CAP_LAYOUTSTATS
9366 | NFS_CAP_CLONE,
abf79bb3
CL		 9367 .init_client = nfs41_init_client,
9368 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 9369 .match_stateid = nfs41_match_stateid,
9370 .find_root_sec = nfs41_find_root_sec,
7017310a 9371 .free_lock_state = nfs41_free_lock_state,
9915ea7e 9372 .call_sync_ops = &nfs41_call_sync_ops,
45870d69 9373 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 9374 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 9375 .session_trunk = nfs4_test_session_trunk,
42c2c424
SD		 9376 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9377 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9378 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 9379 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 9380};
9381#endif
9382
97dc1359
TM		 9383const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
9384 [0] = &nfs_v4_0_minor_ops,
9385#if defined(CONFIG_NFS_V4_1)
9386 [1] = &nfs_v4_1_minor_ops,
9387#endif
42c2c424
SD		 9388#if defined(CONFIG_NFS_V4_2)
9389 [2] = &nfs_v4_2_minor_ops,
9390#endif
97dc1359
TM		 9391};
9392
13997823 9393static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
c4803c49
AG		 9394{
9395 ssize_t error, error2;
9396
9397 error = generic_listxattr(dentry, list, size);
9398 if (error < 0)
9399 return error;
9400 if (list) {
9401 list += error;
9402 size -= error;
9403 }
9404
9405 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
9406 if (error2 < 0)
9407 return error2;
9408 return error + error2;
9409}
9410
17f26b12 9411static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 9412 .create = nfs_create,
9413 .lookup = nfs_lookup,
9414 .atomic_open = nfs_atomic_open,
9415 .link = nfs_link,
9416 .unlink = nfs_unlink,
9417 .symlink = nfs_symlink,
9418 .mkdir = nfs_mkdir,
9419 .rmdir = nfs_rmdir,
9420 .mknod = nfs_mknod,
9421 .rename = nfs_rename,
9422 .permission = nfs_permission,
9423 .getattr = nfs_getattr,
9424 .setattr = nfs_setattr,
c4803c49 9425 .listxattr = nfs4_listxattr,
73a79706
BS		 9426};
9427
92e1d5be 9428static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 9429 .permission = nfs_permission,
9430 .getattr = nfs_getattr,
9431 .setattr = nfs_setattr,
c4803c49 9432 .listxattr = nfs4_listxattr,
6b3b5496
BF		 9433};
9434
509de811 9435const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 9436 .version = 4, /* protocol version */
9437 .dentry_ops = &nfs4_dentry_operations,
9438 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 9439 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 9440 .file_ops = &nfs4_file_operations,
1da177e4 9441 .getroot = nfs4_proc_get_root,
281cad46 9442 .submount = nfs4_submount,
ff9099f2 9443 .try_mount = nfs4_try_mount,
1da177e4
LT		 9444 .getattr = nfs4_proc_getattr,
9445 .setattr = nfs4_proc_setattr,
9446 .lookup = nfs4_proc_lookup,
9447 .access = nfs4_proc_access,
9448 .readlink = nfs4_proc_readlink,
1da177e4
LT		 9449 .create = nfs4_proc_create,
9450 .remove = nfs4_proc_remove,
9451 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 9452 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 9453 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 9454 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 9455 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 9456 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 9457 .link = nfs4_proc_link,
9458 .symlink = nfs4_proc_symlink,
9459 .mkdir = nfs4_proc_mkdir,
9460 .rmdir = nfs4_proc_remove,
9461 .readdir = nfs4_proc_readdir,
9462 .mknod = nfs4_proc_mknod,
9463 .statfs = nfs4_proc_statfs,
9464 .fsinfo = nfs4_proc_fsinfo,
9465 .pathconf = nfs4_proc_pathconf,
e9326dca 9466 .set_capabilities = nfs4_server_capabilities,
1da177e4 9467 .decode_dirent = nfs4_decode_dirent,
a4cdda59 9468 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 9469 .read_setup = nfs4_proc_read_setup,
ec06c096 9470 .read_done = nfs4_read_done,
1da177e4 9471 .write_setup = nfs4_proc_write_setup,
788e7a89 9472 .write_done = nfs4_write_done,
1da177e4 9473 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 9474 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 9475 .commit_done = nfs4_commit_done,
1da177e4 9476 .lock = nfs4_proc_lock,
e50a1c2e 9477 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 9478 .close_context = nfs4_close_context,
2b484297 9479 .open_context = nfs4_atomic_open,
011e2a7f 9480 .have_delegation = nfs4_have_delegation,
57ec14c5 9481 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 9482 .alloc_client = nfs4_alloc_client,
45a52a02 9483 .init_client = nfs4_init_client,
cdb7eced 9484 .free_client = nfs4_free_client,
1179acc6
BS		 9485 .create_server = nfs4_create_server,
9486 .clone_server = nfs_clone_server,
1da177e4
LT		 9487};
9488
64c2ce8b 9489static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
98e9cb57 9490 .name = XATTR_NAME_NFSV4_ACL,
64c2ce8b
AK		 9491 .list = nfs4_xattr_list_nfs4_acl,
9492 .get = nfs4_xattr_get_nfs4_acl,
9493 .set = nfs4_xattr_set_nfs4_acl,
9494};
9495
9496const struct xattr_handler *nfs4_xattr_handlers[] = {
9497 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 9498#ifdef CONFIG_NFS_V4_SECURITY_LABEL
9499 &nfs4_xattr_nfs4_label_handler,
9500#endif
64c2ce8b
AK		 9501 NULL
9502};
9503
1da177e4
LT		 9504/*
9505 * Local variables:
9506 * c-basic-offset: 8
9507 * End:
9508 */
Linux 6.x block layer and io_uring tree(s)