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