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1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
feaff8e5 41#include <linux/file.h>
1da177e4 42#include <linux/string.h>
652f89f6
TM		 43#include <linux/ratelimit.h>
44#include <linux/printk.h>
5a0e3ad6 45#include <linux/slab.h>
1da177e4
LT		 46#include <linux/sunrpc/clnt.h>
47#include <linux/nfs.h>
48#include <linux/nfs4.h>
49#include <linux/nfs_fs.h>
50#include <linux/nfs_page.h>
9b7160c5 51#include <linux/nfs_mount.h>
1da177e4 52#include <linux/namei.h>
02a913a7 53#include <linux/mount.h>
99fe60d0 54#include <linux/module.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
40c64c26 66#include "nfs4idmap.h"
73e39aaa 67#include "nfs4session.h"
de242c0b 68#include "fscache.h"
1da177e4 69
c6d01c6f
TM		 70#include "nfs4trace.h"
71
1da177e4
LT		 72#define NFSDBG_FACILITY NFSDBG_PROC
73
2066fe89 74#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 75#define NFS4_POLL_RETRY_MAX (15*HZ)
76
a1d1c4f1
TM		 77/* file attributes which can be mapped to nfs attributes */
78#define NFS4_VALID_ATTRS (ATTR_MODE \
79 | ATTR_UID \
80 | ATTR_GID \
81 | ATTR_SIZE \
82 | ATTR_ATIME \
83 | ATTR_MTIME \
84 | ATTR_CTIME \
85 | ATTR_ATIME_SET \
86 | ATTR_MTIME_SET)
87
cdd4e68b 88struct nfs4_opendata;
864472e9 89static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 90static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 91static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
81934ddb 92static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 93static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
94static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 95static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
96 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 97 struct nfs4_state *state, struct nfs4_label *ilabel,
98 struct nfs4_label *olabel);
f062eb6c 99#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 100static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
101 struct rpc_cred *);
f0b0bf88
TM		 102static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *,
103 struct rpc_cred *, bool);
f062eb6c 104#endif
aa9c2669
DQ		 105
106#ifdef CONFIG_NFS_V4_SECURITY_LABEL
107static inline struct nfs4_label *
108nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
109 struct iattr *sattr, struct nfs4_label *label)
110{
111 int err;
112
113 if (label == NULL)
114 return NULL;
115
116 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
117 return NULL;
118
aa9c2669
DQ		 119 err = security_dentry_init_security(dentry, sattr->ia_mode,
120 &dentry->d_name, (void **)&label->label, &label->len);
121 if (err == 0)
122 return label;
123
124 return NULL;
125}
126static inline void
127nfs4_label_release_security(struct nfs4_label *label)
128{
129 if (label)
130 security_release_secctx(label->label, label->len);
131}
132static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
133{
134 if (label)
135 return server->attr_bitmask;
136
137 return server->attr_bitmask_nl;
138}
139#else
140static inline struct nfs4_label *
141nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
142 struct iattr *sattr, struct nfs4_label *l)
143{ return NULL; }
144static inline void
145nfs4_label_release_security(struct nfs4_label *label)
146{ return; }
147static inline u32 *
148nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
149{ return server->attr_bitmask; }
150#endif
151
1da177e4 152/* Prevent leaks of NFSv4 errors into userland */
46f72f57 153static int nfs4_map_errors(int err)
1da177e4 154{
52567b03
TM		 155 if (err >= -1000)
156 return err;
157 switch (err) {
158 case -NFS4ERR_RESOURCE:
30005121
WAA		 159 case -NFS4ERR_LAYOUTTRYLATER:
160 case -NFS4ERR_RECALLCONFLICT:
52567b03 161 return -EREMOTEIO;
7ebb9315 162 case -NFS4ERR_WRONGSEC:
8897538e 163 case -NFS4ERR_WRONG_CRED:
7ebb9315 164 return -EPERM;
3ddeb7c5
TM		 165 case -NFS4ERR_BADOWNER:
166 case -NFS4ERR_BADNAME:
167 return -EINVAL;
fb13bfa7
TM		 168 case -NFS4ERR_SHARE_DENIED:
169 return -EACCES;
f25efd85
SD		 170 case -NFS4ERR_MINOR_VERS_MISMATCH:
171 return -EPROTONOSUPPORT;
6e3cf241
TM		 172 case -NFS4ERR_FILE_OPEN:
173 return -EBUSY;
52567b03 174 default:
1da177e4 175 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 176 __func__, -err);
52567b03 177 break;
1da177e4 178 }
52567b03 179 return -EIO;
1da177e4
LT		 180}
181
182/*
183 * This is our standard bitmap for GETATTR requests.
184 */
1549210f 185const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 186 FATTR4_WORD0_TYPE
187 | FATTR4_WORD0_CHANGE
188 | FATTR4_WORD0_SIZE
189 | FATTR4_WORD0_FSID
190 | FATTR4_WORD0_FILEID,
191 FATTR4_WORD1_MODE
192 | FATTR4_WORD1_NUMLINKS
193 | FATTR4_WORD1_OWNER
194 | FATTR4_WORD1_OWNER_GROUP
195 | FATTR4_WORD1_RAWDEV
196 | FATTR4_WORD1_SPACE_USED
197 | FATTR4_WORD1_TIME_ACCESS
198 | FATTR4_WORD1_TIME_METADATA
ea96d1ec
AS		 199 | FATTR4_WORD1_TIME_MODIFY
200 | FATTR4_WORD1_MOUNTED_ON_FILEID,
aa9c2669
DQ		 201#ifdef CONFIG_NFS_V4_SECURITY_LABEL
202 FATTR4_WORD2_SECURITY_LABEL
203#endif
1da177e4
LT		 204};
205
1549210f
TM		 206static const u32 nfs4_pnfs_open_bitmap[3] = {
207 FATTR4_WORD0_TYPE
208 | FATTR4_WORD0_CHANGE
209 | FATTR4_WORD0_SIZE
210 | FATTR4_WORD0_FSID
211 | FATTR4_WORD0_FILEID,
212 FATTR4_WORD1_MODE
213 | FATTR4_WORD1_NUMLINKS
214 | FATTR4_WORD1_OWNER
215 | FATTR4_WORD1_OWNER_GROUP
216 | FATTR4_WORD1_RAWDEV
217 | FATTR4_WORD1_SPACE_USED
218 | FATTR4_WORD1_TIME_ACCESS
219 | FATTR4_WORD1_TIME_METADATA
220 | FATTR4_WORD1_TIME_MODIFY,
221 FATTR4_WORD2_MDSTHRESHOLD
95864c91
TM		 222#ifdef CONFIG_NFS_V4_SECURITY_LABEL
223 | FATTR4_WORD2_SECURITY_LABEL
224#endif
1549210f
TM		 225};
226
e23008ec
AA		 227static const u32 nfs4_open_noattr_bitmap[3] = {
228 FATTR4_WORD0_TYPE
229 | FATTR4_WORD0_CHANGE
230 | FATTR4_WORD0_FILEID,
231};
232
a09df2ca 233const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 234 FATTR4_WORD0_FILES_AVAIL
235 | FATTR4_WORD0_FILES_FREE
236 | FATTR4_WORD0_FILES_TOTAL,
237 FATTR4_WORD1_SPACE_AVAIL
238 | FATTR4_WORD1_SPACE_FREE
239 | FATTR4_WORD1_SPACE_TOTAL
240};
241
a09df2ca 242const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 243 FATTR4_WORD0_MAXLINK
244 | FATTR4_WORD0_MAXNAME,
245 0
246};
247
dae100c2 248const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 249 | FATTR4_WORD0_MAXREAD
250 | FATTR4_WORD0_MAXWRITE
251 | FATTR4_WORD0_LEASE_TIME,
55b6e774 252 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 253 | FATTR4_WORD1_FS_LAYOUT_TYPES,
254 FATTR4_WORD2_LAYOUT_BLKSIZE
2a92ee92 255 | FATTR4_WORD2_CLONE_BLKSIZE
1da177e4
LT		 256};
257
a09df2ca 258const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 259 FATTR4_WORD0_TYPE
260 | FATTR4_WORD0_CHANGE
261 | FATTR4_WORD0_SIZE
262 | FATTR4_WORD0_FSID
263 | FATTR4_WORD0_FILEID
264 | FATTR4_WORD0_FS_LOCATIONS,
265 FATTR4_WORD1_MODE
266 | FATTR4_WORD1_NUMLINKS
267 | FATTR4_WORD1_OWNER
268 | FATTR4_WORD1_OWNER_GROUP
269 | FATTR4_WORD1_RAWDEV
270 | FATTR4_WORD1_SPACE_USED
271 | FATTR4_WORD1_TIME_ACCESS
272 | FATTR4_WORD1_TIME_METADATA
273 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 274 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 275};
276
bc4785cd 277static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 278 struct nfs4_readdir_arg *readdir)
279{
0dbb4c67 280 __be32 *start, *p;
1da177e4 281
1da177e4 282 if (cookie > 2) {
b7ef1956 283 readdir->cookie = cookie;
1da177e4
LT		 284 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
285 return;
286 }
287
288 readdir->cookie = 0;
289 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
290 if (cookie == 2)
291 return;
292
293 /*
294 * NFSv4 servers do not return entries for '.' and '..'
295 * Therefore, we fake these entries here. We let '.'
296 * have cookie 0 and '..' have cookie 1. Note that
297 * when talking to the server, we always send cookie 0
298 * instead of 1 or 2.
299 */
2b86ce2d 300 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 301
302 if (cookie == 0) {
303 *p++ = xdr_one; /* next */
304 *p++ = xdr_zero; /* cookie, first word */
305 *p++ = xdr_one; /* cookie, second word */
306 *p++ = xdr_one; /* entry len */
307 memcpy(p, ".\0\0\0", 4); /* entry */
308 p++;
309 *p++ = xdr_one; /* bitmap length */
310 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
311 *p++ = htonl(8); /* attribute buffer length */
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 */
322 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
323 *p++ = htonl(8); /* attribute buffer length */
2b0143b5 324 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
1da177e4
LT		 325
326 readdir->pgbase = (char *)p - (char *)start;
327 readdir->count -= readdir->pgbase;
2b86ce2d 328 kunmap_atomic(start);
1da177e4
LT		 329}
330
26d36301
TM		 331static void nfs4_test_and_free_stateid(struct nfs_server *server,
332 nfs4_stateid *stateid,
333 struct rpc_cred *cred)
334{
335 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops;
336
337 ops->test_and_free_expired(server, stateid, cred);
338}
339
340static void __nfs4_free_revoked_stateid(struct nfs_server *server,
341 nfs4_stateid *stateid,
342 struct rpc_cred *cred)
343{
344 stateid->type = NFS4_REVOKED_STATEID_TYPE;
345 nfs4_test_and_free_stateid(server, stateid, cred);
346}
347
348static void nfs4_free_revoked_stateid(struct nfs_server *server,
349 const nfs4_stateid *stateid,
350 struct rpc_cred *cred)
351{
352 nfs4_stateid tmp;
353
354 nfs4_stateid_copy(&tmp, stateid);
355 __nfs4_free_revoked_stateid(server, &tmp, cred);
356}
357
8478eaa1
N		 358static long nfs4_update_delay(long *timeout)
359{
360 long ret;
361 if (!timeout)
362 return NFS4_POLL_RETRY_MAX;
363 if (*timeout <= 0)
364 *timeout = NFS4_POLL_RETRY_MIN;
365 if (*timeout > NFS4_POLL_RETRY_MAX)
366 *timeout = NFS4_POLL_RETRY_MAX;
367 ret = *timeout;
368 *timeout <<= 1;
369 return ret;
370}
371
65de872e
TM		 372static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
373{
374 int res = 0;
375
376 might_sleep();
377
8478eaa1
N		 378 freezable_schedule_timeout_killable_unsafe(
379 nfs4_update_delay(timeout));
65de872e
TM		 380 if (fatal_signal_pending(current))
381 res = -ERESTARTSYS;
65de872e
TM		 382 return res;
383}
384
385/* This is the error handling routine for processes that are allowed
386 * to sleep.
387 */
b3c2aa07
TM		 388static int nfs4_do_handle_exception(struct nfs_server *server,
389 int errorcode, struct nfs4_exception *exception)
65de872e
TM		 390{
391 struct nfs_client *clp = server->nfs_client;
9e33bed5 392 struct nfs4_state *state = exception->state;
8487c479 393 const nfs4_stateid *stateid = exception->stateid;
3114ea7a 394 struct inode *inode = exception->inode;
65de872e
TM		 395 int ret = errorcode;
396
b3c2aa07
TM		 397 exception->delay = 0;
398 exception->recovering = 0;
65de872e 399 exception->retry = 0;
272289a3
TM		 400
401 if (stateid == NULL && state != NULL)
402 stateid = &state->stateid;
403
65de872e
TM		 404 switch(errorcode) {
405 case 0:
406 return 0;
5ba12443
TM		 407 case -NFS4ERR_DELEG_REVOKED:
408 case -NFS4ERR_ADMIN_REVOKED:
272289a3 409 case -NFS4ERR_EXPIRED:
5ba12443 410 case -NFS4ERR_BAD_STATEID:
272289a3
TM		 411 if (inode != NULL && stateid != NULL) {
412 nfs_inode_find_state_and_recover(inode,
413 stateid);
414 goto wait_on_recovery;
415 }
416 case -NFS4ERR_OPENMODE:
8487c479
TM		 417 if (inode) {
418 int err;
419
420 err = nfs_async_inode_return_delegation(inode,
421 stateid);
422 if (err == 0)
423 goto wait_on_recovery;
424 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) {
425 exception->retry = 1;
426 break;
427 }
428 }
3114ea7a
TM		 429 if (state == NULL)
430 break;
5d422301
TM		 431 ret = nfs4_schedule_stateid_recovery(server, state);
432 if (ret < 0)
433 break;
3114ea7a 434 goto wait_on_recovery;
65de872e 435 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 436 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 437 nfs4_schedule_lease_recovery(clp);
438 goto wait_on_recovery;
519ae255
CL		 439 case -NFS4ERR_MOVED:
440 ret = nfs4_schedule_migration_recovery(server);
441 if (ret < 0)
442 break;
443 goto wait_on_recovery;
8ef2f8d4
CL		 444 case -NFS4ERR_LEASE_MOVED:
445 nfs4_schedule_lease_moved_recovery(clp);
446 goto wait_on_recovery;
03391693 447#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 448 case -NFS4ERR_BADSESSION:
449 case -NFS4ERR_BADSLOT:
450 case -NFS4ERR_BAD_HIGH_SLOT:
451 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
452 case -NFS4ERR_DEADSESSION:
453 case -NFS4ERR_SEQ_FALSE_RETRY:
454 case -NFS4ERR_SEQ_MISORDERED:
455 dprintk("%s ERROR: %d Reset session\n", __func__,
456 errorcode);
9f594791 457 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 458 goto wait_on_recovery;
03391693 459#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 460 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 461 if (exception->timeout > HZ) {
462 /* We have retried a decent amount, time to
463 * fail
464 */
465 ret = -EBUSY;
466 break;
467 }
65de872e 468 case -NFS4ERR_DELAY:
2598ed34
TM		 469 nfs_inc_server_stats(server, NFSIOS_DELAY);
470 case -NFS4ERR_GRACE:
e85d7ee4 471 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b 472 case -NFS4ERR_RECALLCONFLICT:
b3c2aa07
TM		 473 exception->delay = 1;
474 return 0;
475
a8a4ae3a 476 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 477 case -NFS4ERR_OLD_STATEID:
478 exception->retry = 1;
b064eca2
TM		 479 break;
480 case -NFS4ERR_BADOWNER:
481 /* The following works around a Linux server bug! */
482 case -NFS4ERR_BADNAME:
483 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
484 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
485 exception->retry = 1;
486 printk(KERN_WARNING "NFS: v4 server %s "
487 "does not accept raw "
488 "uid/gids. "
489 "Reenabling the idmapper.\n",
490 server->nfs_client->cl_hostname);
491 }
65de872e
TM		 492 }
493 /* We failed to handle the error */
494 return nfs4_map_errors(ret);
0400a6b0 495wait_on_recovery:
b3c2aa07
TM		 496 exception->recovering = 1;
497 return 0;
498}
499
500/* This is the error handling routine for processes that are allowed
501 * to sleep.
502 */
503int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
504{
505 struct nfs_client *clp = server->nfs_client;
506 int ret;
507
508 ret = nfs4_do_handle_exception(server, errorcode, exception);
509 if (exception->delay) {
510 ret = nfs4_delay(server->client, &exception->timeout);
511 goto out_retry;
512 }
513 if (exception->recovering) {
514 ret = nfs4_wait_clnt_recover(clp);
515 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
516 return -EIO;
517 goto out_retry;
518 }
519 return ret;
520out_retry:
a2c0b9e2
TM		 521 if (ret == 0)
522 exception->retry = 1;
523 return ret;
65de872e
TM		 524}
525
037fc980
TM		 526static int
527nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
528 int errorcode, struct nfs4_exception *exception)
529{
530 struct nfs_client *clp = server->nfs_client;
531 int ret;
532
533 ret = nfs4_do_handle_exception(server, errorcode, exception);
534 if (exception->delay) {
535 rpc_delay(task, nfs4_update_delay(&exception->timeout));
536 goto out_retry;
537 }
538 if (exception->recovering) {
539 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
540 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
541 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
542 goto out_retry;
543 }
519ae255 544 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
037fc980
TM		 545 ret = -EIO;
546 return ret;
547out_retry:
a2c0b9e2
TM		 548 if (ret == 0)
549 exception->retry = 1;
550 return ret;
65de872e
TM		 551}
552
037fc980
TM		 553static int
554nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
555 struct nfs4_state *state, long *timeout)
556{
557 struct nfs4_exception exception = {
558 .state = state,
559 };
560
561 if (task->tk_status >= 0)
562 return 0;
563 if (timeout)
564 exception.timeout = *timeout;
565 task->tk_status = nfs4_async_handle_exception(task, server,
566 task->tk_status,
567 &exception);
568 if (exception.delay && timeout)
569 *timeout = exception.timeout;
570 if (exception.retry)
571 return -EAGAIN;
572 return 0;
573}
574
a5250def
WAA		 575/*
576 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
577 * or 'false' otherwise.
578 */
579static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
580{
581 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
582
583 if (flavor == RPC_AUTH_GSS_KRB5I ||
584 flavor == RPC_AUTH_GSS_KRB5P)
585 return true;
586
587 return false;
588}
65de872e 589
452e9352 590static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 591{
1da177e4
LT		 592 spin_lock(&clp->cl_lock);
593 if (time_before(clp->cl_last_renewal,timestamp))
594 clp->cl_last_renewal = timestamp;
595 spin_unlock(&clp->cl_lock);
596}
597
452e9352
TM		 598static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
599{
be824167
TM		 600 struct nfs_client *clp = server->nfs_client;
601
602 if (!nfs4_has_session(clp))
603 do_renew_lease(clp, timestamp);
452e9352
TM		 604}
605
2a3eb2b9
CL		 606struct nfs4_call_sync_data {
607 const struct nfs_server *seq_server;
608 struct nfs4_sequence_args *seq_args;
609 struct nfs4_sequence_res *seq_res;
610};
611
be3a5d23
TM		 612void nfs4_init_sequence(struct nfs4_sequence_args *args,
613 struct nfs4_sequence_res *res, int cache_reply)
a9c92d6b
CL		 614{
615 args->sa_slot = NULL;
616 args->sa_cache_this = cache_reply;
617 args->sa_privileged = 0;
618
619 res->sr_slot = NULL;
620}
621
622static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
623{
624 args->sa_privileged = 1;
625}
626
cb04ad2a
PT		 627int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
628 struct nfs4_sequence_args *args,
629 struct nfs4_sequence_res *res,
630 struct rpc_task *task)
3bd2384a 631{
3bd2384a
CL		 632 struct nfs4_slot *slot;
633
634 /* slot already allocated? */
635 if (res->sr_slot != NULL)
636 goto out_start;
637
638 spin_lock(&tbl->slot_tbl_lock);
639 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
640 goto out_sleep;
641
642 slot = nfs4_alloc_slot(tbl);
643 if (IS_ERR(slot)) {
644 if (slot == ERR_PTR(-ENOMEM))
645 task->tk_timeout = HZ >> 2;
646 goto out_sleep;
647 }
648 spin_unlock(&tbl->slot_tbl_lock);
649
0a014a44 650 slot->privileged = args->sa_privileged ? 1 : 0;
3bd2384a
CL		 651 args->sa_slot = slot;
652 res->sr_slot = slot;
653
654out_start:
655 rpc_call_start(task);
656 return 0;
657
658out_sleep:
659 if (args->sa_privileged)
660 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
661 NULL, RPC_PRIORITY_PRIVILEGED);
662 else
663 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
664 spin_unlock(&tbl->slot_tbl_lock);
665 return -EAGAIN;
666}
cb04ad2a 667EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
3bd2384a 668
2e80dbe7 669static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res)
3bd2384a
CL		 670{
671 struct nfs4_slot *slot = res->sr_slot;
672 struct nfs4_slot_table *tbl;
673
3bd2384a
CL		 674 tbl = slot->table;
675 spin_lock(&tbl->slot_tbl_lock);
676 if (!nfs41_wake_and_assign_slot(tbl, slot))
677 nfs4_free_slot(tbl, slot);
678 spin_unlock(&tbl->slot_tbl_lock);
679
680 res->sr_slot = NULL;
2e80dbe7
TM		 681}
682
683static int nfs40_sequence_done(struct rpc_task *task,
684 struct nfs4_sequence_res *res)
685{
686 if (res->sr_slot != NULL)
687 nfs40_sequence_free_slot(res);
3bd2384a
CL		 688 return 1;
689}
690
cccef3b9
AA		 691#if defined(CONFIG_NFS_V4_1)
692
d185a334 693static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 694{
e3725ec0 695 struct nfs4_session *session;
13615871 696 struct nfs4_slot_table *tbl;
a13ce7c6 697 struct nfs4_slot *slot = res->sr_slot;
c10e4498 698 bool send_new_highest_used_slotid = false;
13615871 699
a13ce7c6 700 tbl = slot->table;
e3725ec0 701 session = tbl->session;
ea028ac9 702
07e8dcbd
TM		 703 /* Bump the slot sequence number */
704 if (slot->seq_done)
705 slot->seq_nr++;
706 slot->seq_done = 0;
707
35dc1d74 708 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 709 /* Be nice to the server: try to ensure that the last transmitted
710 * value for highest_user_slotid <= target_highest_slotid
711 */
712 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
713 send_new_highest_used_slotid = true;
714
a13ce7c6 715 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 716 send_new_highest_used_slotid = false;
717 goto out_unlock;
718 }
a13ce7c6 719 nfs4_free_slot(tbl, slot);
c10e4498
TM		 720
721 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
722 send_new_highest_used_slotid = false;
b75ad4cd 723out_unlock:
35dc1d74 724 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 725 res->sr_slot = NULL;
c10e4498 726 if (send_new_highest_used_slotid)
3f10a6af 727 nfs41_notify_server(session->clp);
045d2a6d
TM		 728 if (waitqueue_active(&tbl->slot_waitq))
729 wake_up_all(&tbl->slot_waitq);
13615871
AA		 730}
731
2e80dbe7
TM		 732static int nfs41_sequence_process(struct rpc_task *task,
733 struct nfs4_sequence_res *res)
b0df806c 734{
e3725ec0 735 struct nfs4_session *session;
a13ce7c6 736 struct nfs4_slot *slot = res->sr_slot;
14516c3a 737 struct nfs_client *clp;
ac20d163 738 bool interrupted = false;
85563073 739 int ret = 1;
b0df806c 740
a13ce7c6
TM		 741 if (slot == NULL)
742 goto out_noaction;
468f8613
BS		 743 /* don't increment the sequence number if the task wasn't sent */
744 if (!RPC_WAS_SENT(task))
b0df806c
AA		 745 goto out;
746
e3725ec0 747 session = slot->table->session;
933602e3 748
ac20d163
TM		 749 if (slot->interrupted) {
750 slot->interrupted = 0;
751 interrupted = true;
752 }
753
2f92ae34 754 trace_nfs4_sequence_done(session, res);
691daf3b 755 /* Check the SEQUENCE operation status */
14516c3a
TM		 756 switch (res->sr_status) {
757 case 0:
a865880e
OK		 758 /* If previous op on slot was interrupted and we reused
759 * the seq# and got a reply from the cache, then retry
760 */
761 if (task->tk_status == -EREMOTEIO && interrupted) {
762 ++slot->seq_nr;
763 goto retry_nowait;
764 }
b0df806c 765 /* Update the slot's sequence and clientid lease timer */
07e8dcbd 766 slot->seq_done = 1;
e3725ec0 767 clp = session->clp;
8e63b6a8 768 do_renew_lease(clp, res->sr_timestamp);
0629e370 769 /* Check sequence flags */
0a014a44
TM		 770 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags,
771 !!slot->privileged);
464ee9f9 772 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 773 break;
ac20d163
TM		 774 case 1:
775 /*
776 * sr_status remains 1 if an RPC level error occurred.
777 * The server may or may not have processed the sequence
778 * operation..
779 * Mark the slot as having hosted an interrupted RPC call.
780 */
781 slot->interrupted = 1;
782 goto out;
14516c3a
TM		 783 case -NFS4ERR_DELAY:
784 /* The server detected a resend of the RPC call and
785 * returned NFS4ERR_DELAY as per Section 2.10.6.2
786 * of RFC5661.
787 */
df2fabff 788 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 789 __func__,
df2fabff 790 slot->slot_nr,
933602e3 791 slot->seq_nr);
14516c3a 792 goto out_retry;
85563073
TM		 793 case -NFS4ERR_BADSLOT:
794 /*
795 * The slot id we used was probably retired. Try again
796 * using a different slot id.
797 */
e8794440
TM		 798 goto retry_nowait;
799 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 800 /*
801 * Was the last operation on this sequence interrupted?
802 * If so, retry after bumping the sequence number.
803 */
804 if (interrupted) {
805 ++slot->seq_nr;
806 goto retry_nowait;
807 }
e8794440
TM		 808 /*
809 * Could this slot have been previously retired?
810 * If so, then the server may be expecting seq_nr = 1!
811 */
8e63b6a8
TM		 812 if (slot->seq_nr != 1) {
813 slot->seq_nr = 1;
814 goto retry_nowait;
815 }
816 break;
e8794440
TM		 817 case -NFS4ERR_SEQ_FALSE_RETRY:
818 ++slot->seq_nr;
819 goto retry_nowait;
14516c3a
TM		 820 default:
821 /* Just update the slot sequence no. */
07e8dcbd 822 slot->seq_done = 1;
b0df806c
AA		 823 }
824out:
825 /* The session may be reset by one of the error handlers. */
826 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
a13ce7c6 827out_noaction:
85563073 828 return ret;
e8794440
TM		 829retry_nowait:
830 if (rpc_restart_call_prepare(task)) {
2e80dbe7 831 nfs41_sequence_free_slot(res);
e8794440
TM		 832 task->tk_status = 0;
833 ret = 0;
834 }
835 goto out;
14516c3a 836out_retry:
d05dd4e9 837 if (!rpc_restart_call(task))
14516c3a
TM		 838 goto out;
839 rpc_delay(task, NFS4_POLL_RETRY_MAX);
840 return 0;
b0df806c 841}
2e80dbe7
TM		 842
843int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
844{
845 if (!nfs41_sequence_process(task, res))
846 return 0;
847 if (res->sr_slot != NULL)
848 nfs41_sequence_free_slot(res);
849 return 1;
850
851}
f9c96fcc 852EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 853
2e80dbe7
TM		 854static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
855{
856 if (res->sr_slot == NULL)
857 return 1;
858 if (res->sr_slot->table->session != NULL)
859 return nfs41_sequence_process(task, res);
860 return nfs40_sequence_done(task, res);
861}
862
863static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
864{
865 if (res->sr_slot != NULL) {
866 if (res->sr_slot->table->session != NULL)
867 nfs41_sequence_free_slot(res);
868 else
869 nfs40_sequence_free_slot(res);
870 }
871}
872
2c4b131d 873int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 874{
e3725ec0 875 if (res->sr_slot == NULL)
14516c3a 876 return 1;
3bd2384a
CL		 877 if (!res->sr_slot->table->session)
878 return nfs40_sequence_done(task, res);
14516c3a 879 return nfs41_sequence_done(task, res);
df896455 880}
2c4b131d 881EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 882
dc70d7b3 883int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 884 struct nfs4_sequence_args *args,
885 struct nfs4_sequence_res *res,
ce5039c1
AA		 886 struct rpc_task *task)
887{
fbcd4abc
AA		 888 struct nfs4_slot *slot;
889 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 890
891 dprintk("--> %s\n", __func__);
ce5039c1 892 /* slot already allocated? */
dfb4f309 893 if (res->sr_slot != NULL)
d9afbd1b 894 goto out_success;
ce5039c1 895
fbcd4abc
AA		 896 tbl = &session->fc_slot_table;
897
69d206b5
TM		 898 task->tk_timeout = 0;
899
fbcd4abc 900 spin_lock(&tbl->slot_tbl_lock);
774d5f14 901 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 902 !args->sa_privileged) {
0b1c8fc4 903 /* The state manager will wait until the slot table is empty */
0b1c8fc4 904 dprintk("%s session is draining\n", __func__);
7b939a3f 905 goto out_sleep;
689cf5c1
AB		 906 }
907
2dc03b7f 908 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 909 if (IS_ERR(slot)) {
910 /* If out of memory, try again in 1/4 second */
911 if (slot == ERR_PTR(-ENOMEM))
912 task->tk_timeout = HZ >> 2;
fbcd4abc 913 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 914 goto out_sleep;
fbcd4abc
AA		 915 }
916 spin_unlock(&tbl->slot_tbl_lock);
917
0a014a44 918 slot->privileged = args->sa_privileged ? 1 : 0;
2b2fa717 919 args->sa_slot = slot;
fbcd4abc 920
e8d92382 921 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 922 slot->slot_nr, slot->seq_nr);
fbcd4abc 923
dfb4f309 924 res->sr_slot = slot;
8e63b6a8 925 res->sr_timestamp = jiffies;
2a6e26cd 926 res->sr_status_flags = 0;
fbcd4abc
AA		 927 /*
928 * sr_status is only set in decode_sequence, and so will remain
929 * set to 1 if an rpc level failure occurs.
930 */
931 res->sr_status = 1;
2f92ae34 932 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 933out_success:
934 rpc_call_start(task);
ce5039c1 935 return 0;
7b939a3f 936out_sleep:
8fe72bac
TM		 937 /* Privileged tasks are queued with top priority */
938 if (args->sa_privileged)
1e1093c7
TM		 939 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
940 NULL, RPC_PRIORITY_PRIVILEGED);
941 else
942 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 943 spin_unlock(&tbl->slot_tbl_lock);
944 return -EAGAIN;
ce5039c1 945}
dc70d7b3 946EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 947
5a580e0a
CL		 948static int nfs4_setup_sequence(const struct nfs_server *server,
949 struct nfs4_sequence_args *args,
950 struct nfs4_sequence_res *res,
951 struct rpc_task *task)
ce5039c1 952{
035168ab 953 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 954 int ret = 0;
955
3bd2384a 956 if (!session)
cb04ad2a
PT		 957 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
958 args, res, task);
035168ab 959
e8d92382 960 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 961 __func__, session->clp, session, res->sr_slot ?
e8d92382 962 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 963
9d12b216 964 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 965
ce5039c1
AA		 966 dprintk("<-- %s status=%d\n", __func__, ret);
967 return ret;
968}
969
ce5039c1
AA		 970static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
971{
2a3eb2b9 972 struct nfs4_call_sync_data *data = calldata;
6ba7db34 973 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 974
035168ab
TM		 975 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
976
d9afbd1b 977 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 978}
979
69ab40c4
AA		 980static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
981{
2a3eb2b9 982 struct nfs4_call_sync_data *data = calldata;
69ab40c4 983
14516c3a 984 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 985}
986
17280175 987static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 988 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 989 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 990};
991
3bd2384a
CL		 992#else /* !CONFIG_NFS_V4_1 */
993
9915ea7e
CL		 994static int nfs4_setup_sequence(const struct nfs_server *server,
995 struct nfs4_sequence_args *args,
996 struct nfs4_sequence_res *res,
997 struct rpc_task *task)
998{
cb04ad2a
PT		 999 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
1000 args, res, task);
9915ea7e
CL		 1001}
1002
2e80dbe7
TM		 1003static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
1004{
1005 return nfs40_sequence_done(task, res);
1006}
1007
1008static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
1009{
1010 if (res->sr_slot != NULL)
1011 nfs40_sequence_free_slot(res);
1012}
1013
2c4b131d
PT		 1014int nfs4_sequence_done(struct rpc_task *task,
1015 struct nfs4_sequence_res *res)
9915ea7e 1016{
3bd2384a 1017 return nfs40_sequence_done(task, res);
9915ea7e 1018}
2c4b131d 1019EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 1020
1021#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 1022
1023static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
1024{
1025 struct nfs4_call_sync_data *data = calldata;
1026 nfs4_setup_sequence(data->seq_server,
1027 data->seq_args, data->seq_res, task);
1028}
1029
1030static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
1031{
1032 struct nfs4_call_sync_data *data = calldata;
1033 nfs4_sequence_done(task, data->seq_res);
1034}
1035
1036static const struct rpc_call_ops nfs40_call_sync_ops = {
1037 .rpc_call_prepare = nfs40_call_sync_prepare,
1038 .rpc_call_done = nfs40_call_sync_done,
1039};
1040
7c513058
BS		 1041static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
1042 struct nfs_server *server,
ce5039c1
AA		 1043 struct rpc_message *msg,
1044 struct nfs4_sequence_args *args,
8fe72bac 1045 struct nfs4_sequence_res *res)
ce5039c1
AA		 1046{
1047 int ret;
1048 struct rpc_task *task;
9915ea7e 1049 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 1050 struct nfs4_call_sync_data data = {
035168ab 1051 .seq_server = server,
ce5039c1
AA		 1052 .seq_args = args,
1053 .seq_res = res,
ce5039c1
AA		 1054 };
1055 struct rpc_task_setup task_setup = {
7c513058 1056 .rpc_client = clnt,
ce5039c1 1057 .rpc_message = msg,
9915ea7e 1058 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 1059 .callback_data = &data
1060 };
1061
ce5039c1
AA		 1062 task = rpc_run_task(&task_setup);
1063 if (IS_ERR(task))
1064 ret = PTR_ERR(task);
1065 else {
1066 ret = task->tk_status;
1067 rpc_put_task(task);
1068 }
1069 return ret;
1070}
1071
7c513058
BS		 1072int nfs4_call_sync(struct rpc_clnt *clnt,
1073 struct nfs_server *server,
e73b83f2
BS		 1074 struct rpc_message *msg,
1075 struct nfs4_sequence_args *args,
1076 struct nfs4_sequence_res *res,
1077 int cache_reply)
1078{
a9c92d6b 1079 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 1080 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 1081}
cccef3b9 1082
38478b24 1083static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 1084{
38478b24 1085 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 1086
38478b24 1087 spin_lock(&dir->i_lock);
359d7d1c 1088 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 1089 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 1090 nfs_force_lookup_revalidate(dir);
a9a4a87a 1091 dir->i_version = cinfo->after;
3235b403 1092 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
de242c0b 1093 nfs_fscache_invalidate(dir);
38478b24 1094 spin_unlock(&dir->i_lock);
1da177e4
LT		 1095}
1096
e56e0b78 1097struct nfs4_opendata {
c6d00e63 1098 struct kref kref;
e56e0b78
TM		 1099 struct nfs_openargs o_arg;
1100 struct nfs_openres o_res;
cdd4e68b
TM		 1101 struct nfs_open_confirmargs c_arg;
1102 struct nfs_open_confirmres c_res;
6926afd1
TM		 1103 struct nfs4_string owner_name;
1104 struct nfs4_string group_name;
a49c2691 1105 struct nfs4_label *a_label;
e56e0b78 1106 struct nfs_fattr f_attr;
1775fd3e 1107 struct nfs4_label *f_label;
e56e0b78 1108 struct dentry *dir;
82a2c1b7 1109 struct dentry *dentry;
e56e0b78 1110 struct nfs4_state_owner *owner;
aac00a8d 1111 struct nfs4_state *state;
e56e0b78 1112 struct iattr attrs;
26e976a8 1113 unsigned long timestamp;
3e309914 1114 unsigned int rpc_done : 1;
5bc2afc2 1115 unsigned int file_created : 1;
bdeca1b7 1116 unsigned int is_recover : 1;
24ac23ab
TM		 1117 int rpc_status;
1118 int cancelled;
e56e0b78
TM		 1119};
1120
49f9a0fa
TM		 1121static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1122 int err, struct nfs4_exception *exception)
1123{
1124 if (err != -EINVAL)
1125 return false;
1126 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1127 return false;
1128 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1129 exception->retry = 1;
1130 return true;
1131}
1132
6ae37339
TM		 1133static u32
1134nfs4_map_atomic_open_share(struct nfs_server *server,
1135 fmode_t fmode, int openflags)
1136{
1137 u32 res = 0;
1138
1139 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1140 case FMODE_READ:
1141 res = NFS4_SHARE_ACCESS_READ;
1142 break;
1143 case FMODE_WRITE:
1144 res = NFS4_SHARE_ACCESS_WRITE;
1145 break;
1146 case FMODE_READ|FMODE_WRITE:
1147 res = NFS4_SHARE_ACCESS_BOTH;
1148 }
1149 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1150 goto out;
1151 /* Want no delegation if we're using O_DIRECT */
1152 if (openflags & O_DIRECT)
1153 res |= NFS4_SHARE_WANT_NO_DELEG;
1154out:
1155 return res;
1156}
1157
49f9a0fa
TM		 1158static enum open_claim_type4
1159nfs4_map_atomic_open_claim(struct nfs_server *server,
1160 enum open_claim_type4 claim)
1161{
1162 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1163 return claim;
1164 switch (claim) {
1165 default:
1166 return claim;
1167 case NFS4_OPEN_CLAIM_FH:
1168 return NFS4_OPEN_CLAIM_NULL;
1169 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1170 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1171 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1172 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1173 }
1174}
2ced46c2
TM		 1175
1176static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1177{
1178 p->o_res.f_attr = &p->f_attr;
1775fd3e 1179 p->o_res.f_label = p->f_label;
c1d51931
TM		 1180 p->o_res.seqid = p->o_arg.seqid;
1181 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 1182 p->o_res.server = p->o_arg.server;
5f657530 1183 p->o_res.access_request = p->o_arg.access;
2ced46c2 1184 nfs_fattr_init(&p->f_attr);
6926afd1 1185 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 1186}
1187
82a2c1b7 1188static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 1189 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 1190 const struct iattr *attrs,
1775fd3e 1191 struct nfs4_label *label,
4a1c0893 1192 enum open_claim_type4 claim,
8535b2be 1193 gfp_t gfp_mask)
e56e0b78 1194{
82a2c1b7 1195 struct dentry *parent = dget_parent(dentry);
2b0143b5 1196 struct inode *dir = d_inode(parent);
e56e0b78 1197 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1198 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 1199 struct nfs4_opendata *p;
1200
8535b2be 1201 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1202 if (p == NULL)
1203 goto err;
14c43f76
DQ		 1204
1205 p->f_label = nfs4_label_alloc(server, gfp_mask);
1206 if (IS_ERR(p->f_label))
1207 goto err_free_p;
1208
a49c2691
KM		 1209 p->a_label = nfs4_label_alloc(server, gfp_mask);
1210 if (IS_ERR(p->a_label))
1211 goto err_free_f;
1212
63f5f796
TM		 1213 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1214 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1215 if (IS_ERR(p->o_arg.seqid))
14c43f76 1216 goto err_free_label;
82a2c1b7
AV		 1217 nfs_sb_active(dentry->d_sb);
1218 p->dentry = dget(dentry);
e56e0b78
TM		 1219 p->dir = parent;
1220 p->owner = sp;
1221 atomic_inc(&sp->so_count);
dc0b027d
TM		 1222 p->o_arg.open_flags = flags;
1223 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
6ae37339
TM		 1224 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1225 fmode, flags);
ae2bb032
WAA		 1226 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1227 * will return permission denied for all bits until close */
1228 if (!(flags & O_EXCL)) {
1229 /* ask server to check for all possible rights as results
1230 * are cached */
1231 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1232 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1233 }
7539bbab 1234 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1235 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1236 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1237 p->o_arg.name = &dentry->d_name;
e56e0b78 1238 p->o_arg.server = server;
aa9c2669 1239 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1240 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
a49c2691 1241 p->o_arg.label = nfs4_label_copy(p->a_label, label);
49f9a0fa
TM		 1242 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1243 switch (p->o_arg.claim) {
4a1c0893
TM		 1244 case NFS4_OPEN_CLAIM_NULL:
1245 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1246 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1247 p->o_arg.fh = NFS_FH(dir);
1248 break;
1249 case NFS4_OPEN_CLAIM_PREVIOUS:
1250 case NFS4_OPEN_CLAIM_FH:
1251 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1252 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1253 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1254 }
536e43d1 1255 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1256 __u32 verf[2];
d77d76ff 1257
e56e0b78
TM		 1258 p->o_arg.u.attrs = &p->attrs;
1259 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1260
1261 verf[0] = jiffies;
1262 verf[1] = current->pid;
1263 memcpy(p->o_arg.u.verifier.data, verf,
1264 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1265 }
cdd4e68b
TM		 1266 p->c_arg.fh = &p->o_res.fh;
1267 p->c_arg.stateid = &p->o_res.stateid;
1268 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1269 nfs4_init_opendata_res(p);
c6d00e63 1270 kref_init(&p->kref);
e56e0b78 1271 return p;
14c43f76
DQ		 1272
1273err_free_label:
a49c2691
KM		 1274 nfs4_label_free(p->a_label);
1275err_free_f:
14c43f76
DQ		 1276 nfs4_label_free(p->f_label);
1277err_free_p:
e56e0b78
TM		 1278 kfree(p);
1279err:
1280 dput(parent);
1281 return NULL;
1282}
1283
c6d00e63 1284static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1285{
c6d00e63
TM		 1286 struct nfs4_opendata *p = container_of(kref,
1287 struct nfs4_opendata, kref);
82a2c1b7 1288 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1289
1290 nfs_free_seqid(p->o_arg.seqid);
2e80dbe7 1291 nfs4_sequence_free_slot(&p->o_res.seq_res);
aac00a8d
TM		 1292 if (p->state != NULL)
1293 nfs4_put_open_state(p->state);
c6d00e63 1294 nfs4_put_state_owner(p->owner);
14c43f76 1295
a49c2691 1296 nfs4_label_free(p->a_label);
14c43f76
DQ		 1297 nfs4_label_free(p->f_label);
1298
c6d00e63 1299 dput(p->dir);
82a2c1b7
AV		 1300 dput(p->dentry);
1301 nfs_sb_deactive(sb);
6926afd1 1302 nfs_fattr_free_names(&p->f_attr);
e911b815 1303 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1304 kfree(p);
1305}
1306
1307static void nfs4_opendata_put(struct nfs4_opendata *p)
1308{
1309 if (p != NULL)
1310 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1311}
1312
06f814a3
TM		 1313static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1314{
06f814a3
TM		 1315 int ret;
1316
06f814a3 1317 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1318 return ret;
1319}
1320
24311f88
TM		 1321static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1322 fmode_t fmode)
1323{
1324 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1325 case FMODE_READ|FMODE_WRITE:
1326 return state->n_rdwr != 0;
1327 case FMODE_WRITE:
1328 return state->n_wronly != 0;
1329 case FMODE_READ:
1330 return state->n_rdonly != 0;
1331 }
1332 WARN_ON_ONCE(1);
1333 return false;
1334}
1335
dc0b027d 1336static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1337{
1338 int ret = 0;
dc0b027d 1339
536e43d1 1340 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1341 goto out;
1342 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1343 case FMODE_READ:
88069f77
TM		 1344 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1345 && state->n_rdonly != 0;
6ee41268
TM		 1346 break;
1347 case FMODE_WRITE:
88069f77
TM		 1348 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1349 && state->n_wronly != 0;
6ee41268
TM		 1350 break;
1351 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1352 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1353 && state->n_rdwr != 0;
6ee41268 1354 }
dc0b027d 1355out:
6ee41268
TM		 1356 return ret;
1357}
1358
2a606188
TM		 1359static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1360 enum open_claim_type4 claim)
aac00a8d 1361{
652f89f6
TM		 1362 if (delegation == NULL)
1363 return 0;
dc0b027d 1364 if ((delegation->type & fmode) != fmode)
aac00a8d 1365 return 0;
d25be546
TM		 1366 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1367 return 0;
2a606188
TM		 1368 switch (claim) {
1369 case NFS4_OPEN_CLAIM_NULL:
1370 case NFS4_OPEN_CLAIM_FH:
1371 break;
1372 case NFS4_OPEN_CLAIM_PREVIOUS:
1373 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1374 break;
1375 default:
1376 return 0;
1377 }
b7391f44 1378 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1379 return 1;
1380}
1381
dc0b027d 1382static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1383{
dc0b027d 1384 switch (fmode) {
e7616923
TM		 1385 case FMODE_WRITE:
1386 state->n_wronly++;
1387 break;
1388 case FMODE_READ:
1389 state->n_rdonly++;
1390 break;
1391 case FMODE_READ|FMODE_WRITE:
1392 state->n_rdwr++;
1393 }
dc0b027d 1394 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1395}
1396
8a64c4ef
TM		 1397#ifdef CONFIG_NFS_V4_1
1398static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state)
1399{
1400 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags))
1401 return true;
1402 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags))
1403 return true;
1404 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags))
1405 return true;
1406 return false;
1407}
1408#endif /* CONFIG_NFS_V4_1 */
1409
4f14c194
TM		 1410static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1411{
1412 struct nfs_client *clp = state->owner->so_server->nfs_client;
1413 bool need_recover = false;
1414
1415 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1416 need_recover = true;
1417 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1418 need_recover = true;
1419 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1420 need_recover = true;
1421 if (need_recover)
1422 nfs4_state_mark_reclaim_nograce(clp, state);
1423}
1424
e999e80e 1425static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1393d961 1426 const nfs4_stateid *stateid, nfs4_stateid *freeme)
e999e80e
TM		 1427{
1428 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1429 return true;
4f14c194 1430 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1393d961 1431 nfs4_stateid_copy(freeme, &state->open_stateid);
4f14c194 1432 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1433 return true;
4f14c194 1434 }
e999e80e
TM		 1435 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1436 return true;
1437 return false;
1438}
1439
f95549cf
TM		 1440static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1441{
3c38cbe2
TM		 1442 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1443 return;
f95549cf
TM		 1444 if (state->n_wronly)
1445 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1446 if (state->n_rdonly)
1447 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1448 if (state->n_rdwr)
1449 set_bit(NFS_O_RDWR_STATE, &state->flags);
3c38cbe2 1450 set_bit(NFS_OPEN_STATE, &state->flags);
f95549cf
TM		 1451}
1452
226056c5
TM		 1453static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1454 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1455{
226056c5
TM		 1456 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1457 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1458 case FMODE_WRITE:
1459 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1460 break;
1461 case FMODE_READ:
1462 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1463 break;
1464 case 0:
1465 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1466 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1467 clear_bit(NFS_OPEN_STATE, &state->flags);
1468 }
1469 if (stateid == NULL)
1470 return;
3e7dfb16
TM		 1471 /* Handle OPEN+OPEN_DOWNGRADE races */
1472 if (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1473 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
f95549cf 1474 nfs_resync_open_stateid_locked(state);
226056c5 1475 return;
f95549cf 1476 }
003707c7 1477 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1478 nfs4_stateid_copy(&state->stateid, stateid);
1479 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1480}
1481
4a1e2feb
TM		 1482static void nfs_clear_open_stateid(struct nfs4_state *state,
1483 nfs4_stateid *arg_stateid,
1484 nfs4_stateid *stateid, fmode_t fmode)
226056c5
TM		 1485{
1486 write_seqlock(&state->seqlock);
3e7dfb16
TM		 1487 /* Ignore, if the CLOSE argment doesn't match the current stateid */
1488 if (nfs4_state_match_open_stateid_other(state, arg_stateid))
1489 nfs_clear_open_stateid_locked(state, stateid, fmode);
226056c5 1490 write_sequnlock(&state->seqlock);
4f14c194
TM		 1491 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1492 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1493}
1494
1393d961
TM		 1495static void nfs_set_open_stateid_locked(struct nfs4_state *state,
1496 const nfs4_stateid *stateid, fmode_t fmode,
1497 nfs4_stateid *freeme)
003707c7 1498{
dc0b027d 1499 switch (fmode) {
003707c7
TM		 1500 case FMODE_READ:
1501 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1502 break;
1503 case FMODE_WRITE:
1504 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1505 break;
1506 case FMODE_READ|FMODE_WRITE:
1507 set_bit(NFS_O_RDWR_STATE, &state->flags);
1508 }
1393d961 1509 if (!nfs_need_update_open_stateid(state, stateid, freeme))
e999e80e
TM		 1510 return;
1511 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1512 nfs4_stateid_copy(&state->stateid, stateid);
1513 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1514}
1515
1393d961
TM		 1516static void __update_open_stateid(struct nfs4_state *state,
1517 const nfs4_stateid *open_stateid,
1518 const nfs4_stateid *deleg_stateid,
1519 fmode_t fmode,
1520 nfs4_stateid *freeme)
1da177e4 1521{
8bda4e4c
TM		 1522 /*
1523 * Protect the call to nfs4_state_set_mode_locked and
1524 * serialise the stateid update
1525 */
361cad3c 1526 spin_lock(&state->owner->so_lock);
8bda4e4c 1527 write_seqlock(&state->seqlock);
003707c7 1528 if (deleg_stateid != NULL) {
f597c537 1529 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1530 set_bit(NFS_DELEGATED_STATE, &state->flags);
1531 }
1532 if (open_stateid != NULL)
1393d961 1533 nfs_set_open_stateid_locked(state, open_stateid, fmode, freeme);
8bda4e4c 1534 write_sequnlock(&state->seqlock);
dc0b027d 1535 update_open_stateflags(state, fmode);
ec073428 1536 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1537}
1538
1393d961
TM		 1539static int update_open_stateid(struct nfs4_state *state,
1540 const nfs4_stateid *open_stateid,
1541 const nfs4_stateid *delegation,
1542 fmode_t fmode)
34310430 1543{
1393d961
TM		 1544 struct nfs_server *server = NFS_SERVER(state->inode);
1545 struct nfs_client *clp = server->nfs_client;
34310430
TM		 1546 struct nfs_inode *nfsi = NFS_I(state->inode);
1547 struct nfs_delegation *deleg_cur;
83aa3e0f 1548 nfs4_stateid freeme = { };
34310430
TM		 1549 int ret = 0;
1550
dc0b027d 1551 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1552
1553 rcu_read_lock();
1554 deleg_cur = rcu_dereference(nfsi->delegation);
1555 if (deleg_cur == NULL)
1556 goto no_delegation;
1557
1558 spin_lock(&deleg_cur->lock);
17f26b12 1559 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1560 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1561 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1562 goto no_delegation_unlock;
1563
1564 if (delegation == NULL)
1565 delegation = &deleg_cur->stateid;
f597c537 1566 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1567 goto no_delegation_unlock;
1568
b7391f44 1569 nfs_mark_delegation_referenced(deleg_cur);
1393d961
TM		 1570 __update_open_stateid(state, open_stateid, &deleg_cur->stateid,
1571 fmode, &freeme);
34310430
TM		 1572 ret = 1;
1573no_delegation_unlock:
1574 spin_unlock(&deleg_cur->lock);
1575no_delegation:
1576 rcu_read_unlock();
1577
1578 if (!ret && open_stateid != NULL) {
1393d961 1579 __update_open_stateid(state, open_stateid, NULL, fmode, &freeme);
34310430
TM		 1580 ret = 1;
1581 }
4f14c194 1582 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1393d961
TM		 1583 nfs4_schedule_state_manager(clp);
1584 if (freeme.type != 0)
1585 nfs4_test_and_free_stateid(server, &freeme,
1586 state->owner->so_cred);
34310430
TM		 1587
1588 return ret;
1589}
1590
39071e6f
TM		 1591static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1592 const nfs4_stateid *stateid)
1593{
1594 struct nfs4_state *state = lsp->ls_state;
1595 bool ret = false;
1596
1597 spin_lock(&state->state_lock);
1598 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1599 goto out_noupdate;
1600 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1601 goto out_noupdate;
1602 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1603 ret = true;
1604out_noupdate:
1605 spin_unlock(&state->state_lock);
1606 return ret;
1607}
34310430 1608
dc0b027d 1609static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1610{
1611 struct nfs_delegation *delegation;
1612
1613 rcu_read_lock();
1614 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1615 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1616 rcu_read_unlock();
1617 return;
1618 }
1619 rcu_read_unlock();
57ec14c5 1620 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1621}
1622
6ee41268 1623static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1624{
1625 struct nfs4_state *state = opendata->state;
1626 struct nfs_inode *nfsi = NFS_I(state->inode);
1627 struct nfs_delegation *delegation;
f448badd 1628 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1629 fmode_t fmode = opendata->o_arg.fmode;
2a606188 1630 enum open_claim_type4 claim = opendata->o_arg.claim;
aac00a8d
TM		 1631 nfs4_stateid stateid;
1632 int ret = -EAGAIN;
1633
aac00a8d 1634 for (;;) {
61beef75 1635 spin_lock(&state->owner->so_lock);
dc0b027d 1636 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1637 update_open_stateflags(state, fmode);
6ee41268 1638 spin_unlock(&state->owner->so_lock);
61beef75 1639 goto out_return_state;
6ee41268 1640 }
61beef75 1641 spin_unlock(&state->owner->so_lock);
34310430
TM		 1642 rcu_read_lock();
1643 delegation = rcu_dereference(nfsi->delegation);
2a606188 1644 if (!can_open_delegated(delegation, fmode, claim)) {
34310430 1645 rcu_read_unlock();
aac00a8d 1646 break;
34310430 1647 }
aac00a8d 1648 /* Save the delegation */
f597c537 1649 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1650 rcu_read_unlock();
fa332941 1651 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1652 if (!opendata->is_recover) {
1653 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1654 if (ret != 0)
1655 goto out;
1656 }
aac00a8d 1657 ret = -EAGAIN;
34310430
TM		 1658
1659 /* Try to update the stateid using the delegation */
dc0b027d 1660 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1661 goto out_return_state;
aac00a8d 1662 }
aac00a8d
TM		 1663out:
1664 return ERR_PTR(ret);
1665out_return_state:
1666 atomic_inc(&state->count);
1667 return state;
1668}
1669
e23008ec
AA		 1670static void
1671nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1672{
1673 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1674 struct nfs_delegation *delegation;
1675 int delegation_flags = 0;
1676
1677 rcu_read_lock();
1678 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1679 if (delegation)
1680 delegation_flags = delegation->flags;
1681 rcu_read_unlock();
72d79ff8
TM		 1682 switch (data->o_arg.claim) {
1683 default:
1684 break;
1685 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1686 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
e23008ec
AA		 1687 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1688 "returning a delegation for "
1689 "OPEN(CLAIM_DELEGATE_CUR)\n",
1690 clp->cl_hostname);
72d79ff8
TM		 1691 return;
1692 }
1693 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
e23008ec
AA		 1694 nfs_inode_set_delegation(state->inode,
1695 data->owner->so_cred,
1696 &data->o_res);
1697 else
1698 nfs_inode_reclaim_delegation(state->inode,
1699 data->owner->so_cred,
1700 &data->o_res);
1701}
1702
1703/*
1704 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1705 * and update the nfs4_state.
1706 */
1707static struct nfs4_state *
1708_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1709{
1710 struct inode *inode = data->state->inode;
1711 struct nfs4_state *state = data->state;
1712 int ret;
1713
d2bfda2e
WAA		 1714 if (!data->rpc_done) {
1715 if (data->rpc_status) {
1716 ret = data->rpc_status;
1717 goto err;
1718 }
1719 /* cached opens have already been processed */
1720 goto update;
e23008ec
AA		 1721 }
1722
e23008ec
AA		 1723 ret = nfs_refresh_inode(inode, &data->f_attr);
1724 if (ret)
1725 goto err;
1726
1727 if (data->o_res.delegation_type != 0)
1728 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1729update:
e23008ec
AA		 1730 update_open_stateid(state, &data->o_res.stateid, NULL,
1731 data->o_arg.fmode);
d49f042a 1732 atomic_inc(&state->count);
e23008ec
AA		 1733
1734 return state;
1735err:
1736 return ERR_PTR(ret);
1737
1738}
1739
1740static struct nfs4_state *
1741_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1742{
1743 struct inode *inode;
1744 struct nfs4_state *state = NULL;
1b370bc2 1745 int ret;
24ac23ab 1746
aac00a8d 1747 if (!data->rpc_done) {
6ee41268 1748 state = nfs4_try_open_cached(data);
9759b0fb 1749 trace_nfs4_cached_open(data->state);
aac00a8d
TM		 1750 goto out;
1751 }
1752
1b370bc2 1753 ret = -EAGAIN;
24ac23ab 1754 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1755 goto err;
1775fd3e 1756 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1757 ret = PTR_ERR(inode);
03f28e3a 1758 if (IS_ERR(inode))
1b370bc2
TM		 1759 goto err;
1760 ret = -ENOMEM;
24ac23ab
TM		 1761 state = nfs4_get_open_state(inode, data->owner);
1762 if (state == NULL)
1b370bc2 1763 goto err_put_inode;
e23008ec
AA		 1764 if (data->o_res.delegation_type != 0)
1765 nfs4_opendata_check_deleg(data, state);
34310430 1766 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1767 data->o_arg.fmode);
24ac23ab 1768 iput(inode);
aac00a8d 1769out:
7aa262b5 1770 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1771 return state;
1b370bc2
TM		 1772err_put_inode:
1773 iput(inode);
1774err:
1775 return ERR_PTR(ret);
24ac23ab
TM		 1776}
1777
e23008ec
AA		 1778static struct nfs4_state *
1779nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1780{
2e80dbe7
TM		 1781 struct nfs4_state *ret;
1782
e23008ec 1783 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
2e80dbe7
TM		 1784 ret =_nfs4_opendata_reclaim_to_nfs4_state(data);
1785 else
1786 ret = _nfs4_opendata_to_nfs4_state(data);
1787 nfs4_sequence_free_slot(&data->o_res.seq_res);
1788 return ret;
e23008ec
AA		 1789}
1790
864472e9
TM		 1791static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1792{
1793 struct nfs_inode *nfsi = NFS_I(state->inode);
1794 struct nfs_open_context *ctx;
1795
1796 spin_lock(&state->inode->i_lock);
1797 list_for_each_entry(ctx, &nfsi->open_files, list) {
1798 if (ctx->state != state)
1799 continue;
1800 get_nfs_open_context(ctx);
1801 spin_unlock(&state->inode->i_lock);
1802 return ctx;
1803 }
1804 spin_unlock(&state->inode->i_lock);
1805 return ERR_PTR(-ENOENT);
1806}
1807
4a1c0893
TM		 1808static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1809 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1810{
1811 struct nfs4_opendata *opendata;
1812
4a1c0893 1813 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1814 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1815 if (opendata == NULL)
1816 return ERR_PTR(-ENOMEM);
1817 opendata->state = state;
1818 atomic_inc(&state->count);
1819 return opendata;
1820}
1821
24311f88
TM		 1822static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1823 fmode_t fmode)
864472e9 1824{
2ced46c2 1825 struct nfs4_state *newstate;
864472e9
TM		 1826 int ret;
1827
24311f88 1828 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
39f897fd 1829 return 0;
dc0b027d
TM		 1830 opendata->o_arg.open_flags = 0;
1831 opendata->o_arg.fmode = fmode;
be36e185
TM		 1832 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1833 NFS_SB(opendata->dentry->d_sb),
1834 fmode, 0);
2ced46c2
TM		 1835 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1836 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1837 nfs4_init_opendata_res(opendata);
b257957e 1838 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1839 if (ret != 0)
1840 return ret;
2ced46c2 1841 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1842 if (IS_ERR(newstate))
1843 return PTR_ERR(newstate);
24311f88
TM		 1844 if (newstate != opendata->state)
1845 ret = -ESTALE;
643168c2 1846 nfs4_close_state(newstate, fmode);
24311f88 1847 return ret;
864472e9
TM		 1848}
1849
1850static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1851{
864472e9
TM		 1852 int ret;
1853
4f14c194
TM		 1854 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1855 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1856 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1857 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1858 /* memory barrier prior to reading state->n_* */
2ced46c2 1859 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1860 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9 1861 smp_rmb();
24311f88
TM		 1862 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1863 if (ret != 0)
1864 return ret;
1865 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1866 if (ret != 0)
1867 return ret;
1868 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1869 if (ret != 0)
1870 return ret;
1ac7e2fd
TM		 1871 /*
1872 * We may have performed cached opens for all three recoveries.
1873 * Check if we need to update the current stateid.
1874 */
1875 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1876 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1877 write_seqlock(&state->seqlock);
1ac7e2fd 1878 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1879 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1880 write_sequnlock(&state->seqlock);
1ac7e2fd 1881 }
864472e9
TM		 1882 return 0;
1883}
1884
1da177e4
LT		 1885/*
1886 * OPEN_RECLAIM:
1887 * reclaim state on the server after a reboot.
1da177e4 1888 */
539cd03a 1889static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1890{
1ac7e2fd 1891 struct nfs_delegation *delegation;
864472e9 1892 struct nfs4_opendata *opendata;
dc0b027d 1893 fmode_t delegation_type = 0;
1da177e4
LT		 1894 int status;
1895
4a1c0893
TM		 1896 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1897 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1898 if (IS_ERR(opendata))
1899 return PTR_ERR(opendata);
1ac7e2fd
TM		 1900 rcu_read_lock();
1901 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1902 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1903 delegation_type = delegation->type;
1ac7e2fd 1904 rcu_read_unlock();
864472e9
TM		 1905 opendata->o_arg.u.delegation_type = delegation_type;
1906 status = nfs4_open_recover(opendata, state);
c6d00e63 1907 nfs4_opendata_put(opendata);
1da177e4
LT		 1908 return status;
1909}
1910
539cd03a 1911static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1912{
1913 struct nfs_server *server = NFS_SERVER(state->inode);
1914 struct nfs4_exception exception = { };
1915 int err;
1916 do {
539cd03a 1917 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1918 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1919 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1920 continue;
168667c4 1921 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1922 break;
1923 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1924 } while (exception.retry);
1925 return err;
1926}
1927
864472e9
TM		 1928static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1929{
1930 struct nfs_open_context *ctx;
1931 int ret;
1932
1933 ctx = nfs4_state_find_open_context(state);
1934 if (IS_ERR(ctx))
91876b13 1935 return -EAGAIN;
539cd03a 1936 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1937 put_nfs_open_context(ctx);
1938 return ret;
1939}
1940
db4f2e63 1941static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1942{
be76b5b6
TM		 1943 switch (err) {
1944 default:
1945 printk(KERN_ERR "NFS: %s: unhandled error "
1946 "%d.\n", __func__, err);
1947 case 0:
1948 case -ENOENT:
8eee52af 1949 case -EAGAIN:
be76b5b6
TM		 1950 case -ESTALE:
1951 break;
1952 case -NFS4ERR_BADSESSION:
1953 case -NFS4ERR_BADSLOT:
1954 case -NFS4ERR_BAD_HIGH_SLOT:
1955 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1956 case -NFS4ERR_DEADSESSION:
1957 set_bit(NFS_DELEGATED_STATE, &state->flags);
1958 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1959 return -EAGAIN;
1960 case -NFS4ERR_STALE_CLIENTID:
1961 case -NFS4ERR_STALE_STATEID:
1962 set_bit(NFS_DELEGATED_STATE, &state->flags);
be76b5b6
TM		 1963 /* Don't recall a delegation if it was lost */
1964 nfs4_schedule_lease_recovery(server->nfs_client);
1965 return -EAGAIN;
352297b9
CL		 1966 case -NFS4ERR_MOVED:
1967 nfs4_schedule_migration_recovery(server);
1968 return -EAGAIN;
8ef2f8d4
CL		 1969 case -NFS4ERR_LEASE_MOVED:
1970 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1971 return -EAGAIN;
be76b5b6
TM		 1972 case -NFS4ERR_DELEG_REVOKED:
1973 case -NFS4ERR_ADMIN_REVOKED:
404ea356 1974 case -NFS4ERR_EXPIRED:
be76b5b6 1975 case -NFS4ERR_BAD_STATEID:
db4f2e63 1976 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1977 nfs_inode_find_state_and_recover(state->inode,
1978 stateid);
1979 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1980 return -EAGAIN;
be76b5b6
TM		 1981 case -NFS4ERR_DELAY:
1982 case -NFS4ERR_GRACE:
1983 set_bit(NFS_DELEGATED_STATE, &state->flags);
1984 ssleep(1);
1985 return -EAGAIN;
db4f2e63
TM		 1986 case -ENOMEM:
1987 case -NFS4ERR_DENIED:
1988 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1989 return 0;
be76b5b6 1990 }
1da177e4
LT		 1991 return err;
1992}
1993
24311f88
TM		 1994int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
1995 struct nfs4_state *state, const nfs4_stateid *stateid,
1996 fmode_t type)
db4f2e63
TM		 1997{
1998 struct nfs_server *server = NFS_SERVER(state->inode);
1999 struct nfs4_opendata *opendata;
24311f88 2000 int err = 0;
db4f2e63
TM		 2001
2002 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2003 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
2004 if (IS_ERR(opendata))
2005 return PTR_ERR(opendata);
2006 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
5e99b532
JL		 2007 write_seqlock(&state->seqlock);
2008 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2009 write_sequnlock(&state->seqlock);
24311f88
TM		 2010 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2011 switch (type & (FMODE_READ|FMODE_WRITE)) {
2012 case FMODE_READ|FMODE_WRITE:
2013 case FMODE_WRITE:
2014 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
2015 if (err)
2016 break;
2017 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
2018 if (err)
2019 break;
2020 case FMODE_READ:
2021 err = nfs4_open_recover_helper(opendata, FMODE_READ);
2022 }
db4f2e63
TM		 2023 nfs4_opendata_put(opendata);
2024 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
2025}
2026
be05c860
CL		 2027static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
2028{
2029 struct nfs4_opendata *data = calldata;
2030
cb04ad2a
PT		 2031 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
2032 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 2033}
2034
cdd4e68b
TM		 2035static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
2036{
2037 struct nfs4_opendata *data = calldata;
2038
17ead6c8 2039 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 2040
cdd4e68b 2041 data->rpc_status = task->tk_status;
26e976a8 2042 if (data->rpc_status == 0) {
f597c537 2043 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 2044 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 2045 renew_lease(data->o_res.server, data->timestamp);
3e309914 2046 data->rpc_done = 1;
26e976a8 2047 }
cdd4e68b
TM		 2048}
2049
2050static void nfs4_open_confirm_release(void *calldata)
2051{
2052 struct nfs4_opendata *data = calldata;
2053 struct nfs4_state *state = NULL;
2054
2055 /* If this request hasn't been cancelled, do nothing */
2056 if (data->cancelled == 0)
2057 goto out_free;
2058 /* In case of error, no cleanup! */
3e309914 2059 if (!data->rpc_done)
cdd4e68b 2060 goto out_free;
cdd4e68b 2061 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2062 if (!IS_ERR(state))
643168c2 2063 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 2064out_free:
c6d00e63 2065 nfs4_opendata_put(data);
cdd4e68b
TM		 2066}
2067
2068static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 2069 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 2070 .rpc_call_done = nfs4_open_confirm_done,
2071 .rpc_release = nfs4_open_confirm_release,
2072};
2073
2074/*
2075 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
2076 */
2077static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
2078{
2b0143b5 2079 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 2080 struct rpc_task *task;
5138fde0
TM		 2081 struct rpc_message msg = {
2082 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
2083 .rpc_argp = &data->c_arg,
2084 .rpc_resp = &data->c_res,
2085 .rpc_cred = data->owner->so_cred,
2086 };
c970aa85
TM		 2087 struct rpc_task_setup task_setup_data = {
2088 .rpc_client = server->client,
5138fde0 2089 .rpc_message = &msg,
c970aa85
TM		 2090 .callback_ops = &nfs4_open_confirm_ops,
2091 .callback_data = data,
101070ca 2092 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2093 .flags = RPC_TASK_ASYNC,
2094 };
1da177e4
LT		 2095 int status;
2096
17ead6c8 2097 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 2098 kref_get(&data->kref);
3e309914
TM		 2099 data->rpc_done = 0;
2100 data->rpc_status = 0;
5138fde0 2101 data->timestamp = jiffies;
e92c1e0d
BC		 2102 if (data->is_recover)
2103 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
c970aa85 2104 task = rpc_run_task(&task_setup_data);
7a1218a2 2105 if (IS_ERR(task))
cdd4e68b 2106 return PTR_ERR(task);
cdd4e68b
TM		 2107 status = nfs4_wait_for_completion_rpc_task(task);
2108 if (status != 0) {
2109 data->cancelled = 1;
2110 smp_wmb();
2111 } else
2112 status = data->rpc_status;
e6b3c4db 2113 rpc_put_task(task);
1da177e4
LT		 2114 return status;
2115}
2116
24ac23ab 2117static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 2118{
24ac23ab
TM		 2119 struct nfs4_opendata *data = calldata;
2120 struct nfs4_state_owner *sp = data->owner;
549b19cc 2121 struct nfs_client *clp = sp->so_server->nfs_client;
2a606188 2122 enum open_claim_type4 claim = data->o_arg.claim;
5138fde0 2123
24ac23ab 2124 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 2125 goto out_wait;
aac00a8d
TM		 2126 /*
2127 * Check if we still need to send an OPEN call, or if we can use
2128 * a delegation instead.
2129 */
2130 if (data->state != NULL) {
2131 struct nfs_delegation *delegation;
2132
dc0b027d 2133 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 2134 goto out_no_action;
aac00a8d
TM		 2135 rcu_read_lock();
2136 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2a606188 2137 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
652f89f6 2138 goto unlock_no_action;
aac00a8d
TM		 2139 rcu_read_unlock();
2140 }
95b72eb0 2141 /* Update client id. */
549b19cc 2142 data->o_arg.clientid = clp->cl_clientid;
2a606188
TM		 2143 switch (claim) {
2144 default:
2145 break;
8188df17
TM		 2146 case NFS4_OPEN_CLAIM_PREVIOUS:
2147 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2148 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 2149 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 2150 case NFS4_OPEN_CLAIM_FH:
2151 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 2152 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
2153 }
26e976a8 2154 data->timestamp = jiffies;
035168ab 2155 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 2156 &data->o_arg.seq_args,
2240a9e2
TM		 2157 &data->o_res.seq_res,
2158 task) != 0)
2159 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 2160
2161 /* Set the create mode (note dependency on the session type) */
2162 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2163 if (data->o_arg.open_flags & O_EXCL) {
2164 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2165 if (nfs4_has_persistent_session(clp))
2166 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2167 else if (clp->cl_mvops->minor_version > 0)
2168 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2169 }
6ee41268 2170 return;
652f89f6 2171unlock_no_action:
9759b0fb 2172 trace_nfs4_cached_open(data->state);
652f89f6 2173 rcu_read_unlock();
6ee41268
TM		 2174out_no_action:
2175 task->tk_action = NULL;
c8da19b9 2176out_wait:
b75ad4cd 2177 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 2178}
2179
24ac23ab
TM		 2180static void nfs4_open_done(struct rpc_task *task, void *calldata)
2181{
2182 struct nfs4_opendata *data = calldata;
1da177e4 2183
24ac23ab 2184 data->rpc_status = task->tk_status;
d898528c 2185
2e80dbe7 2186 if (!nfs4_sequence_process(task, &data->o_res.seq_res))
14516c3a 2187 return;
d898528c 2188
24ac23ab 2189 if (task->tk_status == 0) {
807d66d8
TM		 2190 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2191 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 2192 case S_IFREG:
2193 break;
2194 case S_IFLNK:
24ac23ab 2195 data->rpc_status = -ELOOP;
6f926b5b
TM		 2196 break;
2197 case S_IFDIR:
24ac23ab 2198 data->rpc_status = -EISDIR;
6f926b5b
TM		 2199 break;
2200 default:
24ac23ab 2201 data->rpc_status = -ENOTDIR;
807d66d8 2202 }
6f926b5b 2203 }
26e976a8 2204 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 2205 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2206 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 2207 }
3e309914 2208 data->rpc_done = 1;
24ac23ab 2209}
6f926b5b 2210
24ac23ab
TM		 2211static void nfs4_open_release(void *calldata)
2212{
2213 struct nfs4_opendata *data = calldata;
2214 struct nfs4_state *state = NULL;
2215
2216 /* If this request hasn't been cancelled, do nothing */
2217 if (data->cancelled == 0)
2218 goto out_free;
2219 /* In case of error, no cleanup! */
3e309914 2220 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 2221 goto out_free;
2222 /* In case we need an open_confirm, no cleanup! */
2223 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2224 goto out_free;
24ac23ab 2225 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2226 if (!IS_ERR(state))
643168c2 2227 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 2228out_free:
c6d00e63 2229 nfs4_opendata_put(data);
24ac23ab
TM		 2230}
2231
2232static const struct rpc_call_ops nfs4_open_ops = {
2233 .rpc_call_prepare = nfs4_open_prepare,
2234 .rpc_call_done = nfs4_open_done,
2235 .rpc_release = nfs4_open_release,
2236};
2237
b257957e 2238static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab 2239{
2b0143b5 2240 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 2241 struct nfs_server *server = NFS_SERVER(dir);
2242 struct nfs_openargs *o_arg = &data->o_arg;
2243 struct nfs_openres *o_res = &data->o_res;
2244 struct rpc_task *task;
5138fde0
TM		 2245 struct rpc_message msg = {
2246 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2247 .rpc_argp = o_arg,
2248 .rpc_resp = o_res,
2249 .rpc_cred = data->owner->so_cred,
2250 };
c970aa85
TM		 2251 struct rpc_task_setup task_setup_data = {
2252 .rpc_client = server->client,
5138fde0 2253 .rpc_message = &msg,
c970aa85
TM		 2254 .callback_ops = &nfs4_open_ops,
2255 .callback_data = data,
101070ca 2256 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2257 .flags = RPC_TASK_ASYNC,
2258 };
24ac23ab
TM		 2259 int status;
2260
a9c92d6b 2261 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 2262 kref_get(&data->kref);
3e309914
TM		 2263 data->rpc_done = 0;
2264 data->rpc_status = 0;
2ced46c2 2265 data->cancelled = 0;
bdeca1b7
TM		 2266 data->is_recover = 0;
2267 if (isrecover) {
8fe72bac 2268 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 2269 data->is_recover = 1;
2270 }
c970aa85 2271 task = rpc_run_task(&task_setup_data);
b257957e
AB		 2272 if (IS_ERR(task))
2273 return PTR_ERR(task);
2274 status = nfs4_wait_for_completion_rpc_task(task);
2275 if (status != 0) {
2276 data->cancelled = 1;
2277 smp_wmb();
2278 } else
2279 status = data->rpc_status;
2280 rpc_put_task(task);
2281
2282 return status;
2283}
2284
2285static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2286{
2b0143b5 2287 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2288 struct nfs_openres *o_res = &data->o_res;
2289 int status;
2290
2291 status = nfs4_run_open_task(data, 1);
2292 if (status != 0 || !data->rpc_done)
2293 return status;
2294
6926afd1
TM		 2295 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2296
b257957e
AB		 2297 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2298 status = _nfs4_proc_open_confirm(data);
2299 if (status != 0)
2300 return status;
2301 }
2302
2303 return status;
2304}
2305
f3792d63
TM		 2306/*
2307 * Additional permission checks in order to distinguish between an
2308 * open for read, and an open for execute. This works around the
2309 * fact that NFSv4 OPEN treats read and execute permissions as being
2310 * the same.
2311 * Note that in the non-execute case, we want to turn off permission
2312 * checking if we just created a new file (POSIX open() semantics).
2313 */
6168f62c
WAA		 2314static int nfs4_opendata_access(struct rpc_cred *cred,
2315 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2316 struct nfs4_state *state, fmode_t fmode,
2317 int openflags)
6168f62c
WAA		 2318{
2319 struct nfs_access_entry cache;
2320 u32 mask;
2321
2322 /* access call failed or for some reason the server doesn't
2323 * support any access modes -- defer access call until later */
2324 if (opendata->o_res.access_supported == 0)
2325 return 0;
2326
2327 mask = 0;
f3792d63
TM		 2328 /*
2329 * Use openflags to check for exec, because fmode won't
2330 * always have FMODE_EXEC set when file open for exec.
2331 */
f8d9a897
WAA		 2332 if (openflags & __FMODE_EXEC) {
2333 /* ONLY check for exec rights */
2334 mask = MAY_EXEC;
f3792d63 2335 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2336 mask = MAY_READ;
6168f62c
WAA		 2337
2338 cache.cred = cred;
2339 cache.jiffies = jiffies;
2340 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2341 nfs_access_add_cache(state->inode, &cache);
2342
bbd3a8ee 2343 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2344 return 0;
2345
2346 /* even though OPEN succeeded, access is denied. Close the file */
2347 nfs4_close_state(state, fmode);
998f40b5 2348 return -EACCES;
6168f62c
WAA		 2349}
2350
b257957e
AB		 2351/*
2352 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2353 */
2354static int _nfs4_proc_open(struct nfs4_opendata *data)
2355{
2b0143b5 2356 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2357 struct nfs_server *server = NFS_SERVER(dir);
2358 struct nfs_openargs *o_arg = &data->o_arg;
2359 struct nfs_openres *o_res = &data->o_res;
2360 int status;
2361
2362 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2363 if (!data->rpc_done)
2364 return status;
2365 if (status != 0) {
2366 if (status == -NFS4ERR_BADNAME &&
2367 !(o_arg->open_flags & O_CREAT))
2368 return -ENOENT;
24ac23ab 2369 return status;
08ef7bd3 2370 }
24ac23ab 2371
6926afd1
TM		 2372 nfs_fattr_map_and_free_names(server, &data->f_attr);
2373
5bc2afc2 2374 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2375 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2376 if (o_arg->open_flags & O_EXCL)
2377 data->file_created = 1;
2378 else if (o_res->cinfo.before != o_res->cinfo.after)
2379 data->file_created = 1;
2380 }
0df5dd4a
TM		 2381 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2382 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2383 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2384 status = _nfs4_proc_open_confirm(data);
1da177e4 2385 if (status != 0)
24ac23ab 2386 return status;
1da177e4
LT		 2387 }
2388 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2389 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2390 return 0;
1da177e4
LT		 2391}
2392
d83217c1
AA		 2393static int nfs4_recover_expired_lease(struct nfs_server *server)
2394{
2395 return nfs4_client_recover_expired_lease(server->nfs_client);
2396}
2397
1da177e4
LT		 2398/*
2399 * OPEN_EXPIRED:
2400 * reclaim state on the server after a network partition.
2401 * Assumes caller holds the appropriate lock
2402 */
539cd03a 2403static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2404{
e56e0b78 2405 struct nfs4_opendata *opendata;
864472e9 2406 int ret;
1da177e4 2407
4a1c0893 2408 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2409 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2410 if (IS_ERR(opendata))
2411 return PTR_ERR(opendata);
864472e9 2412 ret = nfs4_open_recover(opendata, state);
35d05778 2413 if (ret == -ESTALE)
3d4ff43d 2414 d_drop(ctx->dentry);
c6d00e63 2415 nfs4_opendata_put(opendata);
864472e9 2416 return ret;
1da177e4
LT		 2417}
2418
a9ed2e25 2419static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2420{
539cd03a 2421 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2422 struct nfs4_exception exception = { };
2423 int err;
2424
2425 do {
539cd03a 2426 err = _nfs4_open_expired(ctx, state);
42113a75 2427 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2428 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2429 continue;
a9ed2e25
TM		 2430 switch (err) {
2431 default:
2432 goto out;
2433 case -NFS4ERR_GRACE:
2434 case -NFS4ERR_DELAY:
2435 nfs4_handle_exception(server, err, &exception);
2436 err = 0;
2437 }
202b50dc 2438 } while (exception.retry);
a9ed2e25 2439out:
202b50dc
TM		 2440 return err;
2441}
2442
1da177e4
LT		 2443static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2444{
1da177e4 2445 struct nfs_open_context *ctx;
864472e9 2446 int ret;
1da177e4 2447
864472e9
TM		 2448 ctx = nfs4_state_find_open_context(state);
2449 if (IS_ERR(ctx))
91876b13 2450 return -EAGAIN;
539cd03a 2451 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2452 put_nfs_open_context(ctx);
2453 return ret;
1da177e4
LT		 2454}
2455
41020b67
TM		 2456static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
2457 const nfs4_stateid *stateid)
4dfd4f7a 2458{
41020b67 2459 nfs_remove_bad_delegation(state->inode, stateid);
4dfd4f7a
TM		 2460 write_seqlock(&state->seqlock);
2461 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2462 write_sequnlock(&state->seqlock);
2463 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2464}
2465
2466static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2467{
2468 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
41020b67 2469 nfs_finish_clear_delegation_stateid(state, NULL);
4dfd4f7a
TM		 2470}
2471
2472static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2473{
2474 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2475 nfs40_clear_delegation_stateid(state);
2476 return nfs4_open_expired(sp, state);
2477}
2478
45870d69
TM		 2479static int nfs40_test_and_free_expired_stateid(struct nfs_server *server,
2480 nfs4_stateid *stateid,
2481 struct rpc_cred *cred)
2482{
2483 return -NFS4ERR_BAD_STATEID;
2484}
2485
f062eb6c 2486#if defined(CONFIG_NFS_V4_1)
4586f6e2
TM		 2487static int nfs41_test_and_free_expired_stateid(struct nfs_server *server,
2488 nfs4_stateid *stateid,
2489 struct rpc_cred *cred)
2490{
2491 int status;
2492
f7a62ada
TM		 2493 switch (stateid->type) {
2494 default:
2495 break;
2496 case NFS4_INVALID_STATEID_TYPE:
2497 case NFS4_SPECIAL_STATEID_TYPE:
2498 return -NFS4ERR_BAD_STATEID;
2499 case NFS4_REVOKED_STATEID_TYPE:
2500 goto out_free;
2501 }
4586f6e2 2502
f7a62ada 2503 status = nfs41_test_stateid(server, stateid, cred);
4586f6e2
TM		 2504 switch (status) {
2505 case -NFS4ERR_EXPIRED:
2506 case -NFS4ERR_ADMIN_REVOKED:
2507 case -NFS4ERR_DELEG_REVOKED:
f7a62ada
TM		 2508 break;
2509 default:
4586f6e2
TM		 2510 return status;
2511 }
f7a62ada
TM		 2512out_free:
2513 /* Ack the revoked state to the server */
f0b0bf88 2514 nfs41_free_stateid(server, stateid, cred, true);
f7a62ada 2515 return -NFS4ERR_EXPIRED;
4586f6e2
TM		 2516}
2517
0c116cad 2518static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2519{
f062eb6c 2520 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2521 nfs4_stateid stateid;
ab7cb0df 2522 struct nfs_delegation *delegation;
0c116cad
TM		 2523 struct rpc_cred *cred;
2524 int status;
3e60ffdd 2525
ab7cb0df
TM		 2526 /* Get the delegation credential for use by test/free_stateid */
2527 rcu_read_lock();
2528 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2529 if (delegation == NULL) {
ab7cb0df 2530 rcu_read_unlock();
0c116cad
TM		 2531 return;
2532 }
2533
2534 nfs4_stateid_copy(&stateid, &delegation->stateid);
4c8e5447
TM		 2535 if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags)) {
2536 rcu_read_unlock();
41020b67 2537 nfs_finish_clear_delegation_stateid(state, &stateid);
4c8e5447
TM		 2538 return;
2539 }
0c116cad 2540
63d63cbf
TM		 2541 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED, &delegation->flags)) {
2542 rcu_read_unlock();
2543 return;
2544 }
2545
0c116cad
TM		 2546 cred = get_rpccred(delegation->cred);
2547 rcu_read_unlock();
4586f6e2 2548 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
0c116cad 2549 trace_nfs4_test_delegation_stateid(state, NULL, status);
f7a62ada 2550 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID)
41020b67 2551 nfs_finish_clear_delegation_stateid(state, &stateid);
ab7cb0df 2552
0c116cad 2553 put_rpccred(cred);
3e60ffdd
CL		 2554}
2555
c5896fc8
TM		 2556/**
2557 * nfs41_check_expired_locks - possibly free a lock stateid
2558 *
2559 * @state: NFSv4 state for an inode
2560 *
2561 * Returns NFS_OK if recovery for this stateid is now finished.
2562 * Otherwise a negative NFS4ERR value is returned.
2563 */
2564static int nfs41_check_expired_locks(struct nfs4_state *state)
2565{
2566 int status, ret = NFS_OK;
d75a6a0e 2567 struct nfs4_lock_state *lsp, *prev = NULL;
c5896fc8
TM		 2568 struct nfs_server *server = NFS_SERVER(state->inode);
2569
2570 if (!test_bit(LK_STATE_IN_USE, &state->flags))
2571 goto out;
d75a6a0e
BC		 2572
2573 spin_lock(&state->state_lock);
c5896fc8
TM		 2574 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
2575 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
2576 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
2577
d75a6a0e
BC		 2578 atomic_inc(&lsp->ls_count);
2579 spin_unlock(&state->state_lock);
2580
2581 nfs4_put_lock_state(prev);
2582 prev = lsp;
2583
c5896fc8
TM		 2584 status = nfs41_test_and_free_expired_stateid(server,
2585 &lsp->ls_stateid,
2586 cred);
2587 trace_nfs4_test_lock_stateid(state, lsp, status);
2588 if (status == -NFS4ERR_EXPIRED ||
2589 status == -NFS4ERR_BAD_STATEID) {
2590 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
67dd4830 2591 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE;
c5896fc8
TM		 2592 if (!recover_lost_locks)
2593 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2594 } else if (status != NFS_OK) {
2595 ret = status;
d75a6a0e
BC		 2596 nfs4_put_lock_state(prev);
2597 goto out;
c5896fc8 2598 }
d75a6a0e 2599 spin_lock(&state->state_lock);
c5896fc8 2600 }
d75a6a0e
BC		 2601 }
2602 spin_unlock(&state->state_lock);
2603 nfs4_put_lock_state(prev);
c5896fc8
TM		 2604out:
2605 return ret;
2606}
2607
3e60ffdd
CL		 2608/**
2609 * nfs41_check_open_stateid - possibly free an open stateid
2610 *
2611 * @state: NFSv4 state for an inode
2612 *
2613 * Returns NFS_OK if recovery for this stateid is now finished.
2614 * Otherwise a negative NFS4ERR value is returned.
2615 */
2616static int nfs41_check_open_stateid(struct nfs4_state *state)
2617{
2618 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2619 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2620 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2621 int status;
2622
b134fc4a 2623 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) {
8a64c4ef
TM		 2624 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) {
2625 if (nfs4_have_delegation(state->inode, state->state))
2626 return NFS_OK;
2627 return -NFS4ERR_OPENMODE;
2628 }
3e60ffdd 2629 return -NFS4ERR_BAD_STATEID;
b134fc4a 2630 }
4586f6e2 2631 status = nfs41_test_and_free_expired_stateid(server, stateid, cred);
08cb47fa 2632 trace_nfs4_test_open_stateid(state, NULL, status);
f7a62ada 2633 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) {
3e60ffdd
CL		 2634 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2635 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2636 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2637 clear_bit(NFS_OPEN_STATE, &state->flags);
67dd4830 2638 stateid->type = NFS4_INVALID_STATEID_TYPE;
b01dd1d8 2639 }
8a64c4ef
TM		 2640 if (status != NFS_OK)
2641 return status;
2642 if (nfs_open_stateid_recover_openmode(state))
2643 return -NFS4ERR_OPENMODE;
2644 return NFS_OK;
b01dd1d8
BS		 2645}
2646
2647static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2648{
eb64cf96 2649 int status;
b01dd1d8 2650
0c116cad 2651 nfs41_check_delegation_stateid(state);
c5896fc8
TM		 2652 status = nfs41_check_expired_locks(state);
2653 if (status != NFS_OK)
2654 return status;
3e60ffdd 2655 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2656 if (status != NFS_OK)
2657 status = nfs4_open_expired(sp, state);
2658 return status;
f062eb6c
BS		 2659}
2660#endif
2661
aa53ed54
JL		 2662/*
2663 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2664 * fields corresponding to attributes that were used to store the verifier.
2665 * Make sure we clobber those fields in the later setattr call
2666 */
5334c5bd
KM		 2667static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2668 struct iattr *sattr, struct nfs4_label **label)
aa53ed54 2669{
5334c5bd
KM		 2670 const u32 *attrset = opendata->o_res.attrset;
2671
2672 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
aa53ed54
JL		 2673 !(sattr->ia_valid & ATTR_ATIME_SET))
2674 sattr->ia_valid |= ATTR_ATIME;
2675
5334c5bd 2676 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
aa53ed54
JL		 2677 !(sattr->ia_valid & ATTR_MTIME_SET))
2678 sattr->ia_valid |= ATTR_MTIME;
5334c5bd
KM		 2679
2680 /* Except MODE, it seems harmless of setting twice. */
2681 if ((attrset[1] & FATTR4_WORD1_MODE))
2682 sattr->ia_valid &= ~ATTR_MODE;
2683
2684 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2685 *label = NULL;
aa53ed54
JL		 2686}
2687
c21443c2
TM		 2688static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2689 fmode_t fmode,
2690 int flags,
3efb9722 2691 struct nfs_open_context *ctx)
c21443c2
TM		 2692{
2693 struct nfs4_state_owner *sp = opendata->owner;
2694 struct nfs_server *server = sp->so_server;
275bb307 2695 struct dentry *dentry;
c21443c2
TM		 2696 struct nfs4_state *state;
2697 unsigned int seq;
2698 int ret;
2699
2700 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2701
2702 ret = _nfs4_proc_open(opendata);
dca78001 2703 if (ret != 0)
c21443c2
TM		 2704 goto out;
2705
2706 state = nfs4_opendata_to_nfs4_state(opendata);
2707 ret = PTR_ERR(state);
2708 if (IS_ERR(state))
2709 goto out;
2710 if (server->caps & NFS_CAP_POSIX_LOCK)
2711 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
a8ce377a
JL		 2712 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
2713 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
c21443c2 2714
275bb307 2715 dentry = opendata->dentry;
2b0143b5 2716 if (d_really_is_negative(dentry)) {
668d0cd5 2717 struct dentry *alias;
275bb307 2718 d_drop(dentry);
668d0cd5
AV		 2719 alias = d_exact_alias(dentry, state->inode);
2720 if (!alias)
2721 alias = d_splice_alias(igrab(state->inode), dentry);
2722 /* d_splice_alias() can't fail here - it's a non-directory */
2723 if (alias) {
275bb307 2724 dput(ctx->dentry);
668d0cd5 2725 ctx->dentry = dentry = alias;
275bb307
TM		 2726 }
2727 nfs_set_verifier(dentry,
2b0143b5 2728 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2729 }
2730
c21443c2
TM		 2731 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2732 if (ret != 0)
2733 goto out;
2734
3efb9722 2735 ctx->state = state;
2b0143b5 2736 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2737 nfs_inode_attach_open_context(ctx);
2738 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2739 nfs4_schedule_stateid_recovery(server, state);
2740 }
c21443c2
TM		 2741out:
2742 return ret;
2743}
2744
1da177e4 2745/*
24ac23ab 2746 * Returns a referenced nfs4_state
1da177e4 2747 */
82be417a 2748static int _nfs4_do_open(struct inode *dir,
4197a055 2749 struct nfs_open_context *ctx,
82be417a
AA		 2750 int flags,
2751 struct iattr *sattr,
5bc2afc2
TM		 2752 struct nfs4_label *label,
2753 int *opened)
1da177e4
LT		 2754{
2755 struct nfs4_state_owner *sp;
2756 struct nfs4_state *state = NULL;
2757 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2758 struct nfs4_opendata *opendata;
4197a055
TM		 2759 struct dentry *dentry = ctx->dentry;
2760 struct rpc_cred *cred = ctx->cred;
2761 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2762 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2763 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2764 struct nfs4_label *olabel = NULL;
aac00a8d 2765 int status;
1da177e4
LT		 2766
2767 /* Protect against reboot recovery conflicts */
1da177e4 2768 status = -ENOMEM;
d1e284d5
TM		 2769 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2770 if (sp == NULL) {
1da177e4
LT		 2771 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2772 goto out_err;
2773 }
58d9714a
TM		 2774 status = nfs4_recover_expired_lease(server);
2775 if (status != 0)
b4454fe1 2776 goto err_put_state_owner;
2b0143b5
DH		 2777 if (d_really_is_positive(dentry))
2778 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2779 status = -ENOMEM;
2b0143b5 2780 if (d_really_is_positive(dentry))
49f9a0fa 2781 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2782 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2783 label, claim, GFP_KERNEL);
e56e0b78 2784 if (opendata == NULL)
95d35cb4 2785 goto err_put_state_owner;
1da177e4 2786
14c43f76
DQ		 2787 if (label) {
2788 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2789 if (IS_ERR(olabel)) {
2790 status = PTR_ERR(olabel);
2791 goto err_opendata_put;
2792 }
2793 }
2794
e911b815
TM		 2795 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2796 if (!opendata->f_attr.mdsthreshold) {
2797 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2798 if (!opendata->f_attr.mdsthreshold)
2799 goto err_free_label;
2800 }
1549210f 2801 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2802 }
2b0143b5
DH		 2803 if (d_really_is_positive(dentry))
2804 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2805
3efb9722 2806 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2807 if (status != 0)
14c43f76 2808 goto err_free_label;
3efb9722 2809 state = ctx->state;
6168f62c 2810
efcbc04e 2811 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 2812 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
5334c5bd 2813 nfs4_exclusive_attrset(opendata, sattr, &label);
a1d1c4f1
TM		 2814 /*
2815 * send create attributes which was not set by open
2816 * with an extra setattr.
2817 */
2818 if (sattr->ia_valid & NFS4_VALID_ATTRS) {
2819 nfs_fattr_init(opendata->o_res.f_attr);
2820 status = nfs4_do_setattr(state->inode, cred,
2821 opendata->o_res.f_attr, sattr,
2822 state, label, olabel);
2823 if (status == 0) {
2824 nfs_setattr_update_inode(state->inode, sattr,
2825 opendata->o_res.f_attr);
2826 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2827 }
1775fd3e 2828 }
0ab64e0e 2829 }
c5c3fb5f 2830 if (opened && opendata->file_created)
5bc2afc2 2831 *opened |= FILE_CREATED;
82be417a 2832
e911b815 2833 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2834 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2835 opendata->f_attr.mdsthreshold = NULL;
2836 }
82be417a 2837
14c43f76
DQ		 2838 nfs4_label_free(olabel);
2839
c6d00e63 2840 nfs4_opendata_put(opendata);
1da177e4 2841 nfs4_put_state_owner(sp);
1da177e4 2842 return 0;
14c43f76
DQ		 2843err_free_label:
2844 nfs4_label_free(olabel);
c6d00e63
TM		 2845err_opendata_put:
2846 nfs4_opendata_put(opendata);
e56e0b78
TM		 2847err_put_state_owner:
2848 nfs4_put_state_owner(sp);
1da177e4 2849out_err:
1da177e4
LT		 2850 return status;
2851}
2852
2853
82be417a 2854static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2855 struct nfs_open_context *ctx,
82be417a
AA		 2856 int flags,
2857 struct iattr *sattr,
5bc2afc2
TM		 2858 struct nfs4_label *label,
2859 int *opened)
1da177e4 2860{
49f9a0fa 2861 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2862 struct nfs4_exception exception = { };
2863 struct nfs4_state *res;
2864 int status;
2865
2866 do {
5bc2afc2 2867 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2868 res = ctx->state;
42113a75 2869 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2870 if (status == 0)
2871 break;
2872 /* NOTE: BAD_SEQID means the server and client disagree about the
2873 * book-keeping w.r.t. state-changing operations
2874 * (OPEN/CLOSE/LOCK/LOCKU...)
2875 * It is actually a sign of a bug on the client or on the server.
2876 *
2877 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2878 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2879 * have unhashed the old state_owner for us, and that we can
2880 * therefore safely retry using a new one. We should still warn
2881 * the user though...
2882 */
2883 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2884 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2885 " returned a bad sequence-id error!\n",
2886 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2887 exception.retry = 1;
2888 continue;
2889 }
550f5747
TM		 2890 /*
2891 * BAD_STATEID on OPEN means that the server cancelled our
2892 * state before it received the OPEN_CONFIRM.
2893 * Recover by retrying the request as per the discussion
2894 * on Page 181 of RFC3530.
2895 */
2896 if (status == -NFS4ERR_BAD_STATEID) {
2897 exception.retry = 1;
2898 continue;
2899 }
aac00a8d
TM		 2900 if (status == -EAGAIN) {
2901 /* We must have found a delegation */
2902 exception.retry = 1;
2903 continue;
2904 }
49f9a0fa
TM		 2905 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2906 continue;
2907 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2908 status, &exception));
2909 } while (exception.retry);
2910 return res;
2911}
2912
8487c479
TM		 2913static int _nfs4_do_setattr(struct inode *inode,
2914 struct nfs_setattrargs *arg,
2915 struct nfs_setattrres *res,
2916 struct rpc_cred *cred,
2917 struct nfs4_state *state)
1da177e4 2918{
3e4f6290 2919 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2920 struct rpc_message msg = {
659bfcd6 2921 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
8487c479
TM		 2922 .rpc_argp = arg,
2923 .rpc_resp = res,
659bfcd6 2924 .rpc_cred = cred,
1da177e4 2925 };
abf4e13c 2926 struct rpc_cred *delegation_cred = NULL;
26e976a8 2927 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2928 fmode_t fmode;
2929 bool truncate;
65e4308d 2930 int status;
1da177e4 2931
8487c479 2932 nfs_fattr_init(res->fattr);
1da177e4 2933
ee3ae84e 2934 /* Servers should only apply open mode checks for file size changes */
8487c479 2935 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
ee3ae84e
TM		 2936 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2937
8487c479 2938 if (nfs4_copy_delegation_stateid(inode, fmode, &arg->stateid, &delegation_cred)) {
ee3ae84e 2939 /* Use that stateid */
0418dae1 2940 } else if (truncate && state != NULL) {
2a369153
TM		 2941 struct nfs_lockowner lockowner = {
2942 .l_owner = current->files,
2943 .l_pid = current->tgid,
2944 };
0418dae1
TM		 2945 if (!nfs4_valid_open_stateid(state))
2946 return -EBADF;
abf4e13c 2947 if (nfs4_select_rw_stateid(state, FMODE_WRITE, &lockowner,
8487c479 2948 &arg->stateid, &delegation_cred) == -EIO)
0418dae1 2949 return -EBADF;
08e9eac4 2950 } else
8487c479 2951 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
abf4e13c
TM		 2952 if (delegation_cred)
2953 msg.rpc_cred = delegation_cred;
1da177e4 2954
8487c479 2955 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
abf4e13c
TM		 2956
2957 put_rpccred(delegation_cred);
26e976a8
TM		 2958 if (status == 0 && state != NULL)
2959 renew_lease(server, timestamp);
8487c479 2960 trace_nfs4_setattr(inode, &arg->stateid, status);
65e4308d 2961 return status;
1da177e4
LT		 2962}
2963
659bfcd6
TM		 2964static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2965 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2966 struct nfs4_state *state, struct nfs4_label *ilabel,
2967 struct nfs4_label *olabel)
1da177e4 2968{
3e4f6290 2969 struct nfs_server *server = NFS_SERVER(inode);
8487c479
TM		 2970 struct nfs_setattrargs arg = {
2971 .fh = NFS_FH(inode),
2972 .iap = sattr,
2973 .server = server,
2974 .bitmask = server->attr_bitmask,
2975 .label = ilabel,
2976 };
2977 struct nfs_setattrres res = {
2978 .fattr = fattr,
2979 .label = olabel,
2980 .server = server,
2981 };
a1d0b5ee
TM		 2982 struct nfs4_exception exception = {
2983 .state = state,
3114ea7a 2984 .inode = inode,
8487c479 2985 .stateid = &arg.stateid,
a1d0b5ee 2986 };
1da177e4 2987 int err;
8487c479
TM		 2988
2989 arg.bitmask = nfs4_bitmask(server, ilabel);
2990 if (ilabel)
2991 arg.bitmask = nfs4_bitmask(server, olabel);
2992
1da177e4 2993 do {
8487c479 2994 err = _nfs4_do_setattr(inode, &arg, &res, cred, state);
451146be
TM		 2995 switch (err) {
2996 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2997 if (!(sattr->ia_valid & ATTR_SIZE)) {
2998 pr_warn_once("NFSv4: server %s is incorrectly "
2999 "applying open mode checks to "
3000 "a SETATTR that is not "
3001 "changing file size.\n",
3002 server->nfs_client->cl_hostname);
3003 }
451146be
TM		 3004 if (state && !(state->state & FMODE_WRITE)) {
3005 err = -EBADF;
3006 if (sattr->ia_valid & ATTR_OPEN)
3007 err = -EACCES;
3008 goto out;
3009 }
3010 }
3011 err = nfs4_handle_exception(server, err, &exception);
1da177e4 3012 } while (exception.retry);
451146be 3013out:
1da177e4
LT		 3014 return err;
3015}
3016
500d701f
PT		 3017static bool
3018nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
3019{
3020 if (inode == NULL || !nfs_have_layout(inode))
3021 return false;
3022
3023 return pnfs_wait_on_layoutreturn(inode, task);
3024}
3025
1da177e4
LT		 3026struct nfs4_closedata {
3027 struct inode *inode;
3028 struct nfs4_state *state;
3029 struct nfs_closeargs arg;
3030 struct nfs_closeres res;
516a6af6 3031 struct nfs_fattr fattr;
26e976a8 3032 unsigned long timestamp;
f7e8917a
FI		 3033 bool roc;
3034 u32 roc_barrier;
1da177e4
LT		 3035};
3036
963d8fe5 3037static void nfs4_free_closedata(void *data)
9512135d 3038{
963d8fe5
TM		 3039 struct nfs4_closedata *calldata = data;
3040 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 3041 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 3042
f7e8917a
FI		 3043 if (calldata->roc)
3044 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 3045 nfs4_put_open_state(calldata->state);
3046 nfs_free_seqid(calldata->arg.seqid);
9512135d 3047 nfs4_put_state_owner(sp);
322b2b90 3048 nfs_sb_deactive(sb);
9512135d
TM		 3049 kfree(calldata);
3050}
3051
963d8fe5 3052static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 3053{
963d8fe5 3054 struct nfs4_closedata *calldata = data;
1da177e4 3055 struct nfs4_state *state = calldata->state;
1da177e4 3056 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 3057 nfs4_stateid *res_stateid = NULL;
1da177e4 3058
a3ca5651 3059 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 3060 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3061 return;
42113a75 3062 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 3063 /* hmm. we are done with the inode, and in the process of freeing
3064 * the state_owner. we keep this around to process errors
3065 */
1da177e4
LT		 3066 switch (task->tk_status) {
3067 case 0:
412f6c4c 3068 res_stateid = &calldata->res.stateid;
3c13cb5b 3069 if (calldata->roc)
f7e8917a
FI		 3070 pnfs_roc_set_barrier(state->inode,
3071 calldata->roc_barrier);
26e976a8 3072 renew_lease(server, calldata->timestamp);
412f6c4c 3073 break;
69794ad7 3074 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 3075 case -NFS4ERR_STALE_STATEID:
26d36301
TM		 3076 case -NFS4ERR_EXPIRED:
3077 nfs4_free_revoked_stateid(server,
3078 &calldata->arg.stateid,
3079 task->tk_msg.rpc_cred);
9e33bed5
TM		 3080 case -NFS4ERR_OLD_STATEID:
3081 case -NFS4ERR_BAD_STATEID:
566fcec6 3082 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 3083 &state->open_stateid)) {
566fcec6
TM		 3084 rpc_restart_call_prepare(task);
3085 goto out_release;
3086 }
dc0b027d 3087 if (calldata->arg.fmode == 0)
9e33bed5 3088 break;
1da177e4 3089 default:
8478eaa1 3090 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 3091 rpc_restart_call_prepare(task);
69794ad7
TM		 3092 goto out_release;
3093 }
1da177e4 3094 }
4a1e2feb
TM		 3095 nfs_clear_open_stateid(state, &calldata->arg.stateid,
3096 res_stateid, calldata->arg.fmode);
69794ad7 3097out_release:
72211dbe 3098 nfs_release_seqid(calldata->arg.seqid);
516a6af6 3099 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 3100 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 3101}
3102
4ce70ada 3103static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 3104{
4ce70ada 3105 struct nfs4_closedata *calldata = data;
9512135d 3106 struct nfs4_state *state = calldata->state;
7fdab069 3107 struct inode *inode = calldata->inode;
aee7af35 3108 bool is_rdonly, is_wronly, is_rdwr;
88069f77 3109 int call_close = 0;
9512135d 3110
a3ca5651 3111 dprintk("%s: begin!\n", __func__);
963d8fe5 3112 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 3113 goto out_wait;
003707c7 3114
88069f77 3115 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 3116 spin_lock(&state->owner->so_lock);
aee7af35
TM		 3117 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
3118 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
3119 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 3120 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 3121 /* Calculate the change in open mode */
cd9288ff 3122 calldata->arg.fmode = 0;
e7616923 3123 if (state->n_rdwr == 0) {
cd9288ff
TM		 3124 if (state->n_rdonly == 0)
3125 call_close |= is_rdonly;
3126 else if (is_rdonly)
3127 calldata->arg.fmode |= FMODE_READ;
3128 if (state->n_wronly == 0)
3129 call_close |= is_wronly;
3130 else if (is_wronly)
3131 calldata->arg.fmode |= FMODE_WRITE;
e547f262
TM		 3132 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
3133 call_close |= is_rdwr;
cd9288ff
TM		 3134 } else if (is_rdwr)
3135 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
3136
5cc7861e
TM		 3137 if (!nfs4_valid_open_stateid(state) ||
3138 test_bit(NFS_OPEN_STATE, &state->flags) == 0)
5d422301 3139 call_close = 0;
4cecb76f 3140 spin_unlock(&state->owner->so_lock);
88069f77
TM		 3141
3142 if (!call_close) {
963d8fe5 3143 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 3144 goto out_no_action;
9512135d 3145 }
88069f77 3146
500d701f
PT		 3147 if (nfs4_wait_on_layoutreturn(inode, task)) {
3148 nfs_release_seqid(calldata->arg.seqid);
3149 goto out_wait;
3150 }
3151
3c13cb5b 3152 if (calldata->arg.fmode == 0)
88069f77 3153 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3c13cb5b
TM		 3154 if (calldata->roc)
3155 pnfs_roc_get_barrier(inode, &calldata->roc_barrier);
3156
6ae37339
TM		 3157 calldata->arg.share_access =
3158 nfs4_map_atomic_open_share(NFS_SERVER(inode),
3159 calldata->arg.fmode, 0);
88069f77 3160
516a6af6 3161 nfs_fattr_init(calldata->res.fattr);
26e976a8 3162 calldata->timestamp = jiffies;
7fdab069 3163 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 3164 &calldata->arg.seq_args,
3165 &calldata->res.seq_res,
2240a9e2
TM		 3166 task) != 0)
3167 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 3168 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 3169 return;
3170out_no_action:
3171 task->tk_action = NULL;
3172out_wait:
3173 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 3174}
3175
963d8fe5 3176static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 3177 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 3178 .rpc_call_done = nfs4_close_done,
3179 .rpc_release = nfs4_free_closedata,
3180};
3181
fe08c546
PT		 3182static bool nfs4_roc(struct inode *inode)
3183{
40dd4b7a 3184 if (!nfs_have_layout(inode))
fe08c546 3185 return false;
fe08c546
PT		 3186 return pnfs_roc(inode);
3187}
3188
1da177e4
LT		 3189/*
3190 * It is possible for data to be read/written from a mem-mapped file
3191 * after the sys_close call (which hits the vfs layer as a flush).
3192 * This means that we can't safely call nfsv4 close on a file until
3193 * the inode is cleared. This in turn means that we are not good
3194 * NFSv4 citizens - we do not indicate to the server to update the file's
3195 * share state even when we are done with one of the three share
3196 * stateid's in the inode.
3197 *
3198 * NOTE: Caller must be holding the sp->so_owner semaphore!
3199 */
1f7977c1 3200int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 3201{
4a35bd41 3202 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 3203 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 3204 struct nfs4_closedata *calldata;
b39e625b
TM		 3205 struct nfs4_state_owner *sp = state->owner;
3206 struct rpc_task *task;
5138fde0
TM		 3207 struct rpc_message msg = {
3208 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3209 .rpc_cred = state->owner->so_cred,
3210 };
c970aa85
TM		 3211 struct rpc_task_setup task_setup_data = {
3212 .rpc_client = server->client,
5138fde0 3213 .rpc_message = &msg,
c970aa85 3214 .callback_ops = &nfs4_close_ops,
101070ca 3215 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3216 .flags = RPC_TASK_ASYNC,
3217 };
9512135d 3218 int status = -ENOMEM;
1da177e4 3219
fa940720
WAA		 3220 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3221 &task_setup_data.rpc_client, &msg);
3222
8535b2be 3223 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 3224 if (calldata == NULL)
9512135d 3225 goto out;
a9c92d6b 3226 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 3227 calldata->inode = state->inode;
1da177e4 3228 calldata->state = state;
4a35bd41 3229 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 3230 /* Serialization for the sequence id */
63f5f796
TM		 3231 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3232 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 3233 if (IS_ERR(calldata->arg.seqid))
9512135d 3234 goto out_free_calldata;
dc0b027d 3235 calldata->arg.fmode = 0;
a65318bf 3236 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 3237 calldata->res.fattr = &calldata->fattr;
c1d51931 3238 calldata->res.seqid = calldata->arg.seqid;
516a6af6 3239 calldata->res.server = server;
fe08c546 3240 calldata->roc = nfs4_roc(state->inode);
643168c2 3241 nfs_sb_active(calldata->inode->i_sb);
9512135d 3242
1174dd1f
TM		 3243 msg.rpc_argp = &calldata->arg;
3244 msg.rpc_resp = &calldata->res;
c970aa85
TM		 3245 task_setup_data.callback_data = calldata;
3246 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 3247 if (IS_ERR(task))
3248 return PTR_ERR(task);
a49c3c77
TM		 3249 status = 0;
3250 if (wait)
3251 status = rpc_wait_for_completion_task(task);
b39e625b 3252 rpc_put_task(task);
a49c3c77 3253 return status;
9512135d
TM		 3254out_free_calldata:
3255 kfree(calldata);
3256out:
b39e625b
TM		 3257 nfs4_put_open_state(state);
3258 nfs4_put_state_owner(sp);
9512135d 3259 return status;
1da177e4
LT		 3260}
3261
2b484297 3262static struct inode *
5bc2afc2
TM		 3263nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3264 int open_flags, struct iattr *attr, int *opened)
1da177e4 3265{
1da177e4 3266 struct nfs4_state *state;
aa9c2669
DQ		 3267 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3268
3269 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 3270
565277f6 3271 /* Protect against concurrent sillydeletes */
5bc2afc2 3272 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 3273
3274 nfs4_label_release_security(label);
3275
f46e0bd3
TM		 3276 if (IS_ERR(state))
3277 return ERR_CAST(state);
275bb307 3278 return state->inode;
1da177e4
LT		 3279}
3280
1185a552 3281static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 3282{
3283 if (ctx->state == NULL)
3284 return;
3285 if (is_sync)
643168c2 3286 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 3287 else
643168c2 3288 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 3289}
1da177e4 3290
b944dba3
TM		 3291#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3292#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 3293#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 3294
1da177e4
LT		 3295static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3296{
8c61282f 3297 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 3298 struct nfs4_server_caps_arg args = {
3299 .fhandle = fhandle,
8c61282f 3300 .bitmask = bitmask,
43652ad5 3301 };
1da177e4
LT		 3302 struct nfs4_server_caps_res res = {};
3303 struct rpc_message msg = {
3304 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 3305 .rpc_argp = &args,
1da177e4
LT		 3306 .rpc_resp = &res,
3307 };
3308 int status;
3309
8c61282f
KM		 3310 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3311 FATTR4_WORD0_FH_EXPIRE_TYPE |
3312 FATTR4_WORD0_LINK_SUPPORT |
3313 FATTR4_WORD0_SYMLINK_SUPPORT |
3314 FATTR4_WORD0_ACLSUPPORT;
3315 if (minorversion)
3316 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3317
7c513058 3318 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3319 if (status == 0) {
b944dba3 3320 /* Sanity check the server answers */
8c61282f 3321 switch (minorversion) {
b944dba3
TM		 3322 case 0:
3323 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3324 res.attr_bitmask[2] = 0;
3325 break;
3326 case 1:
3327 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3328 break;
3329 case 2:
3330 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3331 }
1da177e4 3332 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 3333 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3334 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3335 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3336 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 3337 NFS_CAP_CTIME|NFS_CAP_MTIME|
3338 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 3339 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3340 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 3341 server->caps |= NFS_CAP_ACLS;
3342 if (res.has_links != 0)
3343 server->caps |= NFS_CAP_HARDLINKS;
3344 if (res.has_symlinks != 0)
3345 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 3346 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3347 server->caps |= NFS_CAP_FILEID;
3348 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3349 server->caps |= NFS_CAP_MODE;
3350 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3351 server->caps |= NFS_CAP_NLINK;
3352 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3353 server->caps |= NFS_CAP_OWNER;
3354 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3355 server->caps |= NFS_CAP_OWNER_GROUP;
3356 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3357 server->caps |= NFS_CAP_ATIME;
3358 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3359 server->caps |= NFS_CAP_CTIME;
3360 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3361 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 3362#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3363 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3364 server->caps |= NFS_CAP_SECURITY_LABEL;
3365#endif
3366 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3367 sizeof(server->attr_bitmask));
b944dba3 3368 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 3369
a65318bf
TM		 3370 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3371 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3372 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 3373 server->cache_consistency_bitmask[2] = 0;
8c61282f
KM		 3374 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3375 sizeof(server->exclcreat_bitmask));
1da177e4 3376 server->acl_bitmask = res.acl_bitmask;
264e6351 3377 server->fh_expire_type = res.fh_expire_type;
1da177e4 3378 }
cccef3b9 3379
1da177e4
LT		 3380 return status;
3381}
3382
55a97593 3383int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 3384{
3385 struct nfs4_exception exception = { };
3386 int err;
3387 do {
3388 err = nfs4_handle_exception(server,
3389 _nfs4_server_capabilities(server, fhandle),
3390 &exception);
3391 } while (exception.retry);
3392 return err;
3393}
3394
3395static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3396 struct nfs_fsinfo *info)
3397{
aa9c2669 3398 u32 bitmask[3];
1da177e4 3399 struct nfs4_lookup_root_arg args = {
aa9c2669 3400 .bitmask = bitmask,
1da177e4
LT		 3401 };
3402 struct nfs4_lookup_res res = {
3403 .server = server,
0e574af1 3404 .fattr = info->fattr,
1da177e4
LT		 3405 .fh = fhandle,
3406 };
3407 struct rpc_message msg = {
3408 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3409 .rpc_argp = &args,
3410 .rpc_resp = &res,
3411 };
008f55d0 3412
aa9c2669
DQ		 3413 bitmask[0] = nfs4_fattr_bitmap[0];
3414 bitmask[1] = nfs4_fattr_bitmap[1];
3415 /*
3416 * Process the label in the upcoming getfattr
3417 */
3418 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3419
0e574af1 3420 nfs_fattr_init(info->fattr);
7c513058 3421 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3422}
3423
3424static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3425 struct nfs_fsinfo *info)
3426{
3427 struct nfs4_exception exception = { };
3428 int err;
3429 do {
fb8a5ba8 3430 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3431 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3432 switch (err) {
3433 case 0:
3434 case -NFS4ERR_WRONGSEC:
05e9cfb4 3435 goto out;
fb8a5ba8
BS		 3436 default:
3437 err = nfs4_handle_exception(server, err, &exception);
3438 }
1da177e4 3439 } while (exception.retry);
05e9cfb4 3440out:
1da177e4
LT		 3441 return err;
3442}
3443
8f70e95f
BS		 3444static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3445 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3446{
c2190661
TM		 3447 struct rpc_auth_create_args auth_args = {
3448 .pseudoflavor = flavor,
3449 };
8f70e95f
BS		 3450 struct rpc_auth *auth;
3451 int ret;
3452
c2190661 3453 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3454 if (IS_ERR(auth)) {
75bc8821 3455 ret = -EACCES;
8f70e95f
BS		 3456 goto out;
3457 }
3458 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3459out:
3460 return ret;
3461}
3462
9a744ba3
CL		 3463/*
3464 * Retry pseudoroot lookup with various security flavors. We do this when:
3465 *
3466 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3467 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3468 *
3469 * Returns zero on success, or a negative NFS4ERR value, or a
3470 * negative errno value.
3471 */
801a16dc 3472static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3473 struct nfs_fsinfo *info)
1da177e4 3474{
9a744ba3
CL		 3475 /* Per 3530bis 15.33.5 */
3476 static const rpc_authflavor_t flav_array[] = {
3477 RPC_AUTH_GSS_KRB5P,
3478 RPC_AUTH_GSS_KRB5I,
3479 RPC_AUTH_GSS_KRB5,
c4eafe11 3480 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3481 RPC_AUTH_NULL,
3482 };
3483 int status = -EPERM;
3484 size_t i;
6a1a1e34 3485
4d4b69dd
WAA		 3486 if (server->auth_info.flavor_len > 0) {
3487 /* try each flavor specified by user */
3488 for (i = 0; i < server->auth_info.flavor_len; i++) {
3489 status = nfs4_lookup_root_sec(server, fhandle, info,
3490 server->auth_info.flavors[i]);
3491 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3492 continue;
3493 break;
3494 }
3495 } else {
3496 /* no flavors specified by user, try default list */
3497 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3498 status = nfs4_lookup_root_sec(server, fhandle, info,
3499 flav_array[i]);
3500 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3501 continue;
3502 break;
3503 }
8f70e95f 3504 }
9a744ba3 3505
fb8a5ba8
BS		 3506 /*
3507 * -EACCESS could mean that the user doesn't have correct permissions
3508 * to access the mount. It could also mean that we tried to mount
3509 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3510 * existing mount programs don't handle -EACCES very well so it should
3511 * be mapped to -EPERM instead.
3512 */
3513 if (status == -EACCES)
3514 status = -EPERM;
801a16dc
BS		 3515 return status;
3516}
3517
2ed4b95b
CL		 3518/**
3519 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3520 * @server: initialized nfs_server handle
3521 * @fhandle: we fill in the pseudo-fs root file handle
3522 * @info: we fill in an FSINFO struct
5e6b1990 3523 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3524 *
3525 * Returns zero on success, or a negative errno.
801a16dc 3526 */
3028eb2b 3527int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3528 struct nfs_fsinfo *info,
3529 bool auth_probe)
801a16dc 3530{
c7757074 3531 int status = 0;
2ed4b95b 3532
c7757074 3533 if (!auth_probe)
5e6b1990 3534 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3535
3536 if (auth_probe || status == NFS4ERR_WRONGSEC)
698c937b
TM		 3537 status = server->nfs_client->cl_mvops->find_root_sec(server,
3538 fhandle, info);
2ed4b95b 3539
1da177e4
LT		 3540 if (status == 0)
3541 status = nfs4_server_capabilities(server, fhandle);
3542 if (status == 0)
3543 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3544
c12e87f4 3545 return nfs4_map_errors(status);
1da177e4
LT		 3546}
3547
bae36241
BS		 3548static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3549 struct nfs_fsinfo *info)
3550{
3551 int error;
3552 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3553 struct nfs4_label *label = NULL;
bae36241
BS		 3554
3555 error = nfs4_server_capabilities(server, mntfh);
3556 if (error < 0) {
3557 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3558 return error;
3559 }
3560
14c43f76
DQ		 3561 label = nfs4_label_alloc(server, GFP_KERNEL);
3562 if (IS_ERR(label))
3563 return PTR_ERR(label);
3564
1775fd3e 3565 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3566 if (error < 0) {
3567 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3568 goto err_free_label;
bae36241
BS		 3569 }
3570
3571 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3572 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3573 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3574
14c43f76
DQ		 3575err_free_label:
3576 nfs4_label_free(label);
3577
bae36241
BS		 3578 return error;
3579}
3580
6b97fd3d
MN		 3581/*
3582 * Get locations and (maybe) other attributes of a referral.
3583 * Note that we'll actually follow the referral later when
3584 * we detect fsid mismatch in inode revalidation
3585 */
f05d147f
BS		 3586static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3587 const struct qstr *name, struct nfs_fattr *fattr,
3588 struct nfs_fh *fhandle)
6b97fd3d
MN		 3589{
3590 int status = -ENOMEM;
3591 struct page *page = NULL;
3592 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3593
3594 page = alloc_page(GFP_KERNEL);
3595 if (page == NULL)
3596 goto out;
3597 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3598 if (locations == NULL)
3599 goto out;
3600
f05d147f 3601 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3602 if (status != 0)
3603 goto out;
519ae255
CL		 3604
3605 /*
3606 * If the fsid didn't change, this is a migration event, not a
3607 * referral. Cause us to drop into the exception handler, which
3608 * will kick off migration recovery.
3609 */
6b97fd3d 3610 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3611 dprintk("%s: server did not return a different fsid for"
3612 " a referral at %s\n", __func__, name->name);
519ae255 3613 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3614 goto out;
3615 }
533eb461
AA		 3616 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3617 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3618
533eb461 3619 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3620 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3621 memset(fhandle, 0, sizeof(struct nfs_fh));
3622out:
3623 if (page)
3624 __free_page(page);
5d7ca35a 3625 kfree(locations);
6b97fd3d
MN		 3626 return status;
3627}
3628
1775fd3e
DQ		 3629static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3630 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3631{
3632 struct nfs4_getattr_arg args = {
3633 .fh = fhandle,
3634 .bitmask = server->attr_bitmask,
3635 };
3636 struct nfs4_getattr_res res = {
3637 .fattr = fattr,
1775fd3e 3638 .label = label,
1da177e4
LT		 3639 .server = server,
3640 };
3641 struct rpc_message msg = {
3642 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3643 .rpc_argp = &args,
3644 .rpc_resp = &res,
3645 };
aa9c2669
DQ		 3646
3647 args.bitmask = nfs4_bitmask(server, label);
3648
0e574af1 3649 nfs_fattr_init(fattr);
7c513058 3650 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3651}
3652
1775fd3e
DQ		 3653static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3654 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3655{
3656 struct nfs4_exception exception = { };
3657 int err;
3658 do {
b5f875a9
TM		 3659 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3660 trace_nfs4_getattr(server, fhandle, fattr, err);
3661 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3662 &exception);
3663 } while (exception.retry);
3664 return err;
3665}
3666
3667/*
3668 * The file is not closed if it is opened due to the a request to change
3669 * the size of the file. The open call will not be needed once the
3670 * VFS layer lookup-intents are implemented.
3671 *
3672 * Close is called when the inode is destroyed.
3673 * If we haven't opened the file for O_WRONLY, we
3674 * need to in the size_change case to obtain a stateid.
3675 *
3676 * Got race?
3677 * Because OPEN is always done by name in nfsv4, it is
3678 * possible that we opened a different file by the same
3679 * name. We can recognize this race condition, but we
3680 * can't do anything about it besides returning an error.
3681 *
3682 * This will be fixed with VFS changes (lookup-intent).
3683 */
3684static int
3685nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3686 struct iattr *sattr)
3687{
2b0143b5 3688 struct inode *inode = d_inode(dentry);
659bfcd6 3689 struct rpc_cred *cred = NULL;
d530838b 3690 struct nfs4_state *state = NULL;
14c43f76 3691 struct nfs4_label *label = NULL;
1da177e4
LT		 3692 int status;
3693
88ac815c
PT		 3694 if (pnfs_ld_layoutret_on_setattr(inode) &&
3695 sattr->ia_valid & ATTR_SIZE &&
3696 sattr->ia_size < i_size_read(inode))
24028672 3697 pnfs_commit_and_return_layout(inode);
8a1636c4 3698
0e574af1 3699 nfs_fattr_init(fattr);
1da177e4 3700
2669940d
AA		 3701 /* Deal with open(O_TRUNC) */
3702 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3703 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3704
3705 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3706 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3707 return 0;
3708
d530838b 3709 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3710 if (sattr->ia_valid & ATTR_FILE) {
3711 struct nfs_open_context *ctx;
3712
3713 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3714 if (ctx) {
3715 cred = ctx->cred;
3716 state = ctx->state;
3717 }
659bfcd6 3718 }
08e9eac4 3719
14c43f76
DQ		 3720 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3721 if (IS_ERR(label))
3722 return PTR_ERR(label);
3723
3724 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3725 if (status == 0) {
f044636d 3726 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3727 nfs_setsecurity(inode, fattr, label);
3728 }
14c43f76 3729 nfs4_label_free(label);
1da177e4
LT		 3730 return status;
3731}
3732
0c2e53f1
TM		 3733static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3734 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3735 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3736{
0c2e53f1 3737 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3738 int status;
3739 struct nfs4_lookup_arg args = {
3740 .bitmask = server->attr_bitmask,
0c2e53f1 3741 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3742 .name = name,
3743 };
3744 struct nfs4_lookup_res res = {
3745 .server = server,
3746 .fattr = fattr,
aa9c2669 3747 .label = label,
2b3de441
DH		 3748 .fh = fhandle,
3749 };
3750 struct rpc_message msg = {
3751 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3752 .rpc_argp = &args,
3753 .rpc_resp = &res,
3754 };
3755
aa9c2669
DQ		 3756 args.bitmask = nfs4_bitmask(server, label);
3757
2b3de441
DH		 3758 nfs_fattr_init(fattr);
3759
1da177e4 3760 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3761 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3762 dprintk("NFS reply lookup: %d\n", status);
3763 return status;
3764}
3765
72de53ec 3766static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3767{
7ebb9315 3768 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3769 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3770 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3771 fattr->nlink = 2;
3772}
3773
72de53ec 3774static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
beffb8fe 3775 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3776 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3777{
3778 struct nfs4_exception exception = { };
72de53ec 3779 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3780 int err;
3781 do {
1775fd3e 3782 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3783 trace_nfs4_lookup(dir, name, err);
72de53ec 3784 switch (err) {
08ef7bd3 3785 case -NFS4ERR_BADNAME:
72de53ec
BS		 3786 err = -ENOENT;
3787 goto out;
0c2e53f1 3788 case -NFS4ERR_MOVED:
f05d147f 3789 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3790 if (err == -NFS4ERR_MOVED)
3791 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3792 goto out;
0c2e53f1 3793 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3794 err = -EPERM;
3795 if (client != *clnt)
3796 goto out;
66b06860 3797 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3798 if (IS_ERR(client))
3799 return PTR_ERR(client);
3800
3801 exception.retry = 1;
3802 break;
3803 default:
3804 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3805 }
1da177e4 3806 } while (exception.retry);
72de53ec
BS		 3807
3808out:
3809 if (err == 0)
3810 *clnt = client;
3811 else if (client != *clnt)
3812 rpc_shutdown_client(client);
3813
1da177e4
LT		 3814 return err;
3815}
3816
beffb8fe 3817static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1775fd3e
DQ		 3818 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3819 struct nfs4_label *label)
72de53ec
BS		 3820{
3821 int status;
3822 struct rpc_clnt *client = NFS_CLIENT(dir);
3823
1775fd3e 3824 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3825 if (client != NFS_CLIENT(dir)) {
3826 rpc_shutdown_client(client);
3827 nfs_fixup_secinfo_attributes(fattr);
3828 }
3829 return status;
3830}
3831
f05d147f 3832struct rpc_clnt *
beffb8fe 3833nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name,
f05d147f
BS		 3834 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3835{
b72888cb 3836 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3837 int status;
f05d147f 3838
1775fd3e 3839 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3840 if (status < 0)
f05d147f 3841 return ERR_PTR(status);
b72888cb 3842 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3843}
3844
1da177e4
LT		 3845static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3846{
76b32999 3847 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3848 struct nfs4_accessargs args = {
3849 .fh = NFS_FH(inode),
a4980e78 3850 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3851 };
3852 struct nfs4_accessres res = {
3853 .server = server,
1da177e4 3854 };
1da177e4
LT		 3855 struct rpc_message msg = {
3856 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3857 .rpc_argp = &args,
3858 .rpc_resp = &res,
3859 .rpc_cred = entry->cred,
3860 };
3861 int mode = entry->mask;
aa9c2669 3862 int status = 0;
1da177e4
LT		 3863
3864 /*
3865 * Determine which access bits we want to ask for...
3866 */
3867 if (mode & MAY_READ)
3868 args.access |= NFS4_ACCESS_READ;
3869 if (S_ISDIR(inode->i_mode)) {
3870 if (mode & MAY_WRITE)
3871 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3872 if (mode & MAY_EXEC)
3873 args.access |= NFS4_ACCESS_LOOKUP;
3874 } else {
3875 if (mode & MAY_WRITE)
3876 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3877 if (mode & MAY_EXEC)
3878 args.access |= NFS4_ACCESS_EXECUTE;
3879 }
c407d41a
TM		 3880
3881 res.fattr = nfs_alloc_fattr();
3882 if (res.fattr == NULL)
3883 return -ENOMEM;
3884
7c513058 3885 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3886 if (!status) {
6168f62c 3887 nfs_access_set_mask(entry, res.access);
c407d41a 3888 nfs_refresh_inode(inode, res.fattr);
1da177e4 3889 }
c407d41a 3890 nfs_free_fattr(res.fattr);
1da177e4
LT		 3891 return status;
3892}
3893
3894static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3895{
3896 struct nfs4_exception exception = { };
3897 int err;
3898 do {
c1578b76
TM		 3899 err = _nfs4_proc_access(inode, entry);
3900 trace_nfs4_access(inode, err);
3901 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3902 &exception);
3903 } while (exception.retry);
3904 return err;
3905}
3906
3907/*
3908 * TODO: For the time being, we don't try to get any attributes
3909 * along with any of the zero-copy operations READ, READDIR,
3910 * READLINK, WRITE.
3911 *
3912 * In the case of the first three, we want to put the GETATTR
3913 * after the read-type operation -- this is because it is hard
3914 * to predict the length of a GETATTR response in v4, and thus
3915 * align the READ data correctly. This means that the GETATTR
3916 * may end up partially falling into the page cache, and we should
3917 * shift it into the 'tail' of the xdr_buf before processing.
3918 * To do this efficiently, we need to know the total length
3919 * of data received, which doesn't seem to be available outside
3920 * of the RPC layer.
3921 *
3922 * In the case of WRITE, we also want to put the GETATTR after
3923 * the operation -- in this case because we want to make sure
140150db 3924 * we get the post-operation mtime and size.
1da177e4
LT		 3925 *
3926 * Both of these changes to the XDR layer would in fact be quite
3927 * minor, but I decided to leave them for a subsequent patch.
3928 */
3929static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3930 unsigned int pgbase, unsigned int pglen)
3931{
3932 struct nfs4_readlink args = {
3933 .fh = NFS_FH(inode),
3934 .pgbase = pgbase,
3935 .pglen = pglen,
3936 .pages = &page,
3937 };
f50c7000 3938 struct nfs4_readlink_res res;
1da177e4
LT		 3939 struct rpc_message msg = {
3940 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3941 .rpc_argp = &args,
f50c7000 3942 .rpc_resp = &res,
1da177e4
LT		 3943 };
3944
7c513058 3945 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3946}
3947
3948static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3949 unsigned int pgbase, unsigned int pglen)
3950{
3951 struct nfs4_exception exception = { };
3952 int err;
3953 do {
c1578b76
TM		 3954 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3955 trace_nfs4_readlink(inode, err);
3956 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3957 &exception);
3958 } while (exception.retry);
3959 return err;
3960}
3961
1da177e4 3962/*
8867fe58 3963 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3964 */
1da177e4
LT		 3965static int
3966nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3967 int flags)
1da177e4 3968{
aa9c2669 3969 struct nfs4_label l, *ilabel = NULL;
8867fe58 3970 struct nfs_open_context *ctx;
1da177e4 3971 struct nfs4_state *state;
1da177e4
LT		 3972 int status = 0;
3973
8867fe58
MS		 3974 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3975 if (IS_ERR(ctx))
3976 return PTR_ERR(ctx);
3977
aa9c2669
DQ		 3978 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3979
a8a5da99 3980 sattr->ia_mode &= ~current_umask();
c5c3fb5f 3981 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 3982 if (IS_ERR(state)) {
3983 status = PTR_ERR(state);
c0204fd2 3984 goto out;
1da177e4 3985 }
1da177e4 3986out:
aa9c2669 3987 nfs4_label_release_security(ilabel);
8867fe58 3988 put_nfs_open_context(ctx);
1da177e4
LT		 3989 return status;
3990}
3991
beffb8fe 3992static int _nfs4_proc_remove(struct inode *dir, const struct qstr *name)
1da177e4 3993{
16e42959 3994 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3995 struct nfs_removeargs args = {
1da177e4 3996 .fh = NFS_FH(dir),
26fe5750 3997 .name = *name,
16e42959 3998 };
4fdc17b2 3999 struct nfs_removeres res = {
16e42959 4000 .server = server,
1da177e4 4001 };
1da177e4 4002 struct rpc_message msg = {
4fdc17b2
TM		 4003 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
4004 .rpc_argp = &args,
4005 .rpc_resp = &res,
1da177e4 4006 };
778d2817 4007 int status;
1da177e4 4008
7c513058 4009 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 4010 if (status == 0)
16e42959 4011 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 4012 return status;
4013}
4014
beffb8fe 4015static int nfs4_proc_remove(struct inode *dir, const struct qstr *name)
1da177e4
LT		 4016{
4017 struct nfs4_exception exception = { };
4018 int err;
4019 do {
078ea3df
TM		 4020 err = _nfs4_proc_remove(dir, name);
4021 trace_nfs4_remove(dir, name, err);
4022 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4023 &exception);
4024 } while (exception.retry);
4025 return err;
4026}
4027
e4eff1a6 4028static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 4029{
e4eff1a6
TM		 4030 struct nfs_server *server = NFS_SERVER(dir);
4031 struct nfs_removeargs *args = msg->rpc_argp;
4032 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 4033
e4eff1a6 4034 res->server = server;
1da177e4 4035 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 4036 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 4037
4038 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 4039}
4040
34e137cc
BS		 4041static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
4042{
884be175 4043 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb),
d9afbd1b
TM		 4044 &data->args.seq_args,
4045 &data->res.seq_res,
4046 task);
1da177e4
LT		 4047}
4048
e4eff1a6 4049static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 4050{
078ea3df
TM		 4051 struct nfs_unlinkdata *data = task->tk_calldata;
4052 struct nfs_removeres *res = &data->res;
e4eff1a6 4053
14516c3a
TM		 4054 if (!nfs4_sequence_done(task, &res->seq_res))
4055 return 0;
8478eaa1
N		 4056 if (nfs4_async_handle_error(task, res->server, NULL,
4057 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 4058 return 0;
4059 update_changeattr(dir, &res->cinfo);
e4eff1a6 4060 return 1;
1da177e4
LT		 4061}
4062
d3d4152a
JL		 4063static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
4064{
4065 struct nfs_server *server = NFS_SERVER(dir);
4066 struct nfs_renameargs *arg = msg->rpc_argp;
4067 struct nfs_renameres *res = msg->rpc_resp;
4068
4069 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 4070 res->server = server;
a9c92d6b 4071 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 4072}
4073
c6bfa1a1
BS		 4074static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
4075{
d9afbd1b
TM		 4076 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
4077 &data->args.seq_args,
4078 &data->res.seq_res,
4079 task);
d3d4152a
JL		 4080}
4081
4082static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
4083 struct inode *new_dir)
4084{
fbc6f7c2
TM		 4085 struct nfs_renamedata *data = task->tk_calldata;
4086 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 4087
4088 if (!nfs4_sequence_done(task, &res->seq_res))
4089 return 0;
8478eaa1 4090 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 4091 return 0;
4092
4093 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 4094 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 4095 return 1;
4096}
4097
beffb8fe 4098static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4 4099{
91ba2eee 4100 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 4101 struct nfs4_link_arg arg = {
4102 .fh = NFS_FH(inode),
4103 .dir_fh = NFS_FH(dir),
4104 .name = name,
91ba2eee
TM		 4105 .bitmask = server->attr_bitmask,
4106 };
91ba2eee
TM		 4107 struct nfs4_link_res res = {
4108 .server = server,
1775fd3e 4109 .label = NULL,
1da177e4 4110 };
1da177e4
LT		 4111 struct rpc_message msg = {
4112 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
4113 .rpc_argp = &arg,
91ba2eee 4114 .rpc_resp = &res,
1da177e4 4115 };
136f2627
TM		 4116 int status = -ENOMEM;
4117
4118 res.fattr = nfs_alloc_fattr();
778d2817 4119 if (res.fattr == NULL)
136f2627 4120 goto out;
1da177e4 4121
14c43f76
DQ		 4122 res.label = nfs4_label_alloc(server, GFP_KERNEL);
4123 if (IS_ERR(res.label)) {
4124 status = PTR_ERR(res.label);
4125 goto out;
4126 }
aa9c2669 4127 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 4128
7c513058 4129 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 4130 if (!status) {
4131 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 4132 status = nfs_post_op_update_inode(inode, res.fattr);
4133 if (!status)
4134 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 4135 }
14c43f76
DQ		 4136
4137
4138 nfs4_label_free(res.label);
4139
136f2627 4140out:
136f2627 4141 nfs_free_fattr(res.fattr);
1da177e4
LT		 4142 return status;
4143}
4144
beffb8fe 4145static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4
LT		 4146{
4147 struct nfs4_exception exception = { };
4148 int err;
4149 do {
4150 err = nfs4_handle_exception(NFS_SERVER(inode),
4151 _nfs4_proc_link(inode, dir, name),
4152 &exception);
4153 } while (exception.retry);
4154 return err;
4155}
4156
57dc9a57
TM		 4157struct nfs4_createdata {
4158 struct rpc_message msg;
4159 struct nfs4_create_arg arg;
4160 struct nfs4_create_res res;
4161 struct nfs_fh fh;
4162 struct nfs_fattr fattr;
1775fd3e 4163 struct nfs4_label *label;
57dc9a57
TM		 4164};
4165
4166static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
beffb8fe 4167 const struct qstr *name, struct iattr *sattr, u32 ftype)
57dc9a57
TM		 4168{
4169 struct nfs4_createdata *data;
4170
4171 data = kzalloc(sizeof(*data), GFP_KERNEL);
4172 if (data != NULL) {
4173 struct nfs_server *server = NFS_SERVER(dir);
4174
14c43f76
DQ		 4175 data->label = nfs4_label_alloc(server, GFP_KERNEL);
4176 if (IS_ERR(data->label))
4177 goto out_free;
4178
57dc9a57
TM		 4179 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
4180 data->msg.rpc_argp = &data->arg;
4181 data->msg.rpc_resp = &data->res;
4182 data->arg.dir_fh = NFS_FH(dir);
4183 data->arg.server = server;
4184 data->arg.name = name;
4185 data->arg.attrs = sattr;
4186 data->arg.ftype = ftype;
aa9c2669 4187 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 4188 data->res.server = server;
4189 data->res.fh = &data->fh;
4190 data->res.fattr = &data->fattr;
1775fd3e 4191 data->res.label = data->label;
57dc9a57 4192 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 4193 }
4194 return data;
14c43f76
DQ		 4195out_free:
4196 kfree(data);
4197 return NULL;
57dc9a57
TM		 4198}
4199
4200static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
4201{
7c513058 4202 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 4203 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 4204 if (status == 0) {
4205 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 4206 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 4207 }
4208 return status;
4209}
4210
4211static void nfs4_free_createdata(struct nfs4_createdata *data)
4212{
14c43f76 4213 nfs4_label_free(data->label);
57dc9a57
TM		 4214 kfree(data);
4215}
4216
4f390c15 4217static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 4218 struct page *page, unsigned int len, struct iattr *sattr,
4219 struct nfs4_label *label)
1da177e4 4220{
57dc9a57
TM		 4221 struct nfs4_createdata *data;
4222 int status = -ENAMETOOLONG;
1da177e4 4223
94a6d753 4224 if (len > NFS4_MAXPATHLEN)
57dc9a57 4225 goto out;
4f390c15 4226
57dc9a57
TM		 4227 status = -ENOMEM;
4228 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
4229 if (data == NULL)
4230 goto out;
4231
4232 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
4233 data->arg.u.symlink.pages = &page;
4234 data->arg.u.symlink.len = len;
1775fd3e 4235 data->arg.label = label;
1da177e4 4236
57dc9a57
TM		 4237 status = nfs4_do_create(dir, dentry, data);
4238
4239 nfs4_free_createdata(data);
4240out:
1da177e4
LT		 4241 return status;
4242}
4243
4f390c15 4244static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 4245 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 4246{
4247 struct nfs4_exception exception = { };
aa9c2669 4248 struct nfs4_label l, *label = NULL;
1da177e4 4249 int err;
aa9c2669
DQ		 4250
4251 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4252
1da177e4 4253 do {
078ea3df
TM		 4254 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4255 trace_nfs4_symlink(dir, &dentry->d_name, err);
4256 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4257 &exception);
4258 } while (exception.retry);
aa9c2669
DQ		 4259
4260 nfs4_label_release_security(label);
1da177e4
LT		 4261 return err;
4262}
4263
4264static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 4265 struct iattr *sattr, struct nfs4_label *label)
1da177e4 4266{
57dc9a57
TM		 4267 struct nfs4_createdata *data;
4268 int status = -ENOMEM;
1da177e4 4269
57dc9a57
TM		 4270 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4271 if (data == NULL)
4272 goto out;
4273
1775fd3e 4274 data->arg.label = label;
57dc9a57
TM		 4275 status = nfs4_do_create(dir, dentry, data);
4276
4277 nfs4_free_createdata(data);
4278out:
1da177e4
LT		 4279 return status;
4280}
4281
4282static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4283 struct iattr *sattr)
4284{
4285 struct nfs4_exception exception = { };
aa9c2669 4286 struct nfs4_label l, *label = NULL;
1da177e4 4287 int err;
a8a5da99 4288
aa9c2669
DQ		 4289 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4290
a8a5da99 4291 sattr->ia_mode &= ~current_umask();
1da177e4 4292 do {
078ea3df
TM		 4293 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4294 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4295 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4296 &exception);
4297 } while (exception.retry);
aa9c2669
DQ		 4298 nfs4_label_release_security(label);
4299
1da177e4
LT		 4300 return err;
4301}
4302
4303static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4304 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4 4305{
2b0143b5 4306 struct inode *dir = d_inode(dentry);
1da177e4
LT		 4307 struct nfs4_readdir_arg args = {
4308 .fh = NFS_FH(dir),
56e4ebf8 4309 .pages = pages,
1da177e4
LT		 4310 .pgbase = 0,
4311 .count = count,
2b0143b5 4312 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 4313 .plus = plus,
1da177e4
LT		 4314 };
4315 struct nfs4_readdir_res res;
4316 struct rpc_message msg = {
4317 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4318 .rpc_argp = &args,
4319 .rpc_resp = &res,
4320 .rpc_cred = cred,
4321 };
4322 int status;
4323
6de1472f
AV		 4324 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4325 dentry,
eadf4598 4326 (unsigned long long)cookie);
c3f52af3 4327 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 4328 res.pgbase = args.pgbase;
7c513058 4329 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 4330 if (status >= 0) {
c3f52af3 4331 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 4332 status += args.pgbase;
4333 }
c4812998
TM		 4334
4335 nfs_invalidate_atime(dir);
4336
3110ff80 4337 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 4338 return status;
4339}
4340
4341static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4342 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 4343{
4344 struct nfs4_exception exception = { };
4345 int err;
4346 do {
c1578b76
TM		 4347 err = _nfs4_proc_readdir(dentry, cred, cookie,
4348 pages, count, plus);
2b0143b5
DH		 4349 trace_nfs4_readdir(d_inode(dentry), err);
4350 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 4351 &exception);
4352 } while (exception.retry);
4353 return err;
4354}
4355
4356static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 4357 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 4358{
57dc9a57
TM		 4359 struct nfs4_createdata *data;
4360 int mode = sattr->ia_mode;
4361 int status = -ENOMEM;
1da177e4 4362
57dc9a57
TM		 4363 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4364 if (data == NULL)
4365 goto out;
4366
1da177e4 4367 if (S_ISFIFO(mode))
57dc9a57 4368 data->arg.ftype = NF4FIFO;
1da177e4 4369 else if (S_ISBLK(mode)) {
57dc9a57
TM		 4370 data->arg.ftype = NF4BLK;
4371 data->arg.u.device.specdata1 = MAJOR(rdev);
4372 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 4373 }
4374 else if (S_ISCHR(mode)) {
57dc9a57
TM		 4375 data->arg.ftype = NF4CHR;
4376 data->arg.u.device.specdata1 = MAJOR(rdev);
4377 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 4378 } else if (!S_ISSOCK(mode)) {
4379 status = -EINVAL;
4380 goto out_free;
1da177e4 4381 }
1775fd3e 4382
aa9c2669 4383 data->arg.label = label;
57dc9a57 4384 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 4385out_free:
57dc9a57
TM		 4386 nfs4_free_createdata(data);
4387out:
1da177e4
LT		 4388 return status;
4389}
4390
4391static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4392 struct iattr *sattr, dev_t rdev)
4393{
4394 struct nfs4_exception exception = { };
aa9c2669 4395 struct nfs4_label l, *label = NULL;
1da177e4 4396 int err;
a8a5da99 4397
aa9c2669
DQ		 4398 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4399
a8a5da99 4400 sattr->ia_mode &= ~current_umask();
1da177e4 4401 do {
078ea3df
TM		 4402 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4403 trace_nfs4_mknod(dir, &dentry->d_name, err);
4404 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4405 &exception);
4406 } while (exception.retry);
aa9c2669
DQ		 4407
4408 nfs4_label_release_security(label);
4409
1da177e4
LT		 4410 return err;
4411}
4412
4413static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4414 struct nfs_fsstat *fsstat)
4415{
4416 struct nfs4_statfs_arg args = {
4417 .fh = fhandle,
4418 .bitmask = server->attr_bitmask,
4419 };
24ad148a
BH		 4420 struct nfs4_statfs_res res = {
4421 .fsstat = fsstat,
4422 };
1da177e4
LT		 4423 struct rpc_message msg = {
4424 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4425 .rpc_argp = &args,
24ad148a 4426 .rpc_resp = &res,
1da177e4
LT		 4427 };
4428
0e574af1 4429 nfs_fattr_init(fsstat->fattr);
7c513058 4430 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4431}
4432
4433static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4434{
4435 struct nfs4_exception exception = { };
4436 int err;
4437 do {
4438 err = nfs4_handle_exception(server,
4439 _nfs4_proc_statfs(server, fhandle, fsstat),
4440 &exception);
4441 } while (exception.retry);
4442 return err;
4443}
4444
4445static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4446 struct nfs_fsinfo *fsinfo)
4447{
4448 struct nfs4_fsinfo_arg args = {
4449 .fh = fhandle,
4450 .bitmask = server->attr_bitmask,
4451 };
3dda5e43
BH		 4452 struct nfs4_fsinfo_res res = {
4453 .fsinfo = fsinfo,
4454 };
1da177e4
LT		 4455 struct rpc_message msg = {
4456 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4457 .rpc_argp = &args,
3dda5e43 4458 .rpc_resp = &res,
1da177e4
LT		 4459 };
4460
7c513058 4461 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4462}
4463
4464static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4465{
4466 struct nfs4_exception exception = { };
83ca7f5a 4467 unsigned long now = jiffies;
1da177e4
LT		 4468 int err;
4469
4470 do {
83ca7f5a 4471 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4472 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a 4473 if (err == 0) {
fb10fb67
TM		 4474 nfs4_set_lease_period(server->nfs_client,
4475 fsinfo->lease_time * HZ,
4476 now);
83ca7f5a
CL		 4477 break;
4478 }
4479 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4480 } while (exception.retry);
4481 return err;
4482}
4483
4484static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4485{
e38eb650
BS		 4486 int error;
4487
0e574af1 4488 nfs_fattr_init(fsinfo->fattr);
e38eb650 4489 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4490 if (error == 0) {
4491 /* block layout checks this! */
4492 server->pnfs_blksize = fsinfo->blksize;
ca440c38 4493 set_pnfs_layoutdriver(server, fhandle, fsinfo);
dc182549 4494 }
e38eb650
BS		 4495
4496 return error;
1da177e4
LT		 4497}
4498
4499static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4500 struct nfs_pathconf *pathconf)
4501{
4502 struct nfs4_pathconf_arg args = {
4503 .fh = fhandle,
4504 .bitmask = server->attr_bitmask,
4505 };
d45b2989
BH		 4506 struct nfs4_pathconf_res res = {
4507 .pathconf = pathconf,
4508 };
1da177e4
LT		 4509 struct rpc_message msg = {
4510 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4511 .rpc_argp = &args,
d45b2989 4512 .rpc_resp = &res,
1da177e4
LT		 4513 };
4514
4515 /* None of the pathconf attributes are mandatory to implement */
4516 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4517 memset(pathconf, 0, sizeof(*pathconf));
4518 return 0;
4519 }
4520
0e574af1 4521 nfs_fattr_init(pathconf->fattr);
7c513058 4522 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4523}
4524
4525static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4526 struct nfs_pathconf *pathconf)
4527{
4528 struct nfs4_exception exception = { };
4529 int err;
4530
4531 do {
4532 err = nfs4_handle_exception(server,
4533 _nfs4_proc_pathconf(server, fhandle, pathconf),
4534 &exception);
4535 } while (exception.retry);
4536 return err;
4537}
4538
5521abfd 4539int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4540 const struct nfs_open_context *ctx,
4541 const struct nfs_lock_context *l_ctx,
4542 fmode_t fmode)
4543{
4544 const struct nfs_lockowner *lockowner = NULL;
4545
4546 if (l_ctx != NULL)
4547 lockowner = &l_ctx->lockowner;
abf4e13c 4548 return nfs4_select_rw_stateid(ctx->state, fmode, lockowner, stateid, NULL);
9b206149
TM		 4549}
4550EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4551
5521abfd
TM		 4552static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4553 const struct nfs_open_context *ctx,
4554 const struct nfs_lock_context *l_ctx,
4555 fmode_t fmode)
4556{
4557 nfs4_stateid current_stateid;
4558
e1253be0
TM		 4559 /* If the current stateid represents a lost lock, then exit */
4560 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4561 return true;
5521abfd
TM		 4562 return nfs4_stateid_match(stateid, &current_stateid);
4563}
4564
4565static bool nfs4_error_stateid_expired(int err)
4566{
4567 switch (err) {
4568 case -NFS4ERR_DELEG_REVOKED:
4569 case -NFS4ERR_ADMIN_REVOKED:
4570 case -NFS4ERR_BAD_STATEID:
4571 case -NFS4ERR_STALE_STATEID:
4572 case -NFS4ERR_OLD_STATEID:
4573 case -NFS4ERR_OPENMODE:
4574 case -NFS4ERR_EXPIRED:
4575 return true;
4576 }
4577 return false;
4578}
4579
d45f60c6 4580static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4581{
d45f60c6 4582 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4583
d45f60c6 4584 trace_nfs4_read(hdr, task->tk_status);
9c27869d
TM		 4585 if (task->tk_status < 0) {
4586 struct nfs4_exception exception = {
4587 .inode = hdr->inode,
4588 .state = hdr->args.context->state,
4589 .stateid = &hdr->args.stateid,
4590 };
4591 task->tk_status = nfs4_async_handle_exception(task,
4592 server, task->tk_status, &exception);
4593 if (exception.retry) {
4594 rpc_restart_call_prepare(task);
4595 return -EAGAIN;
4596 }
1da177e4 4597 }
8850df99 4598
1da177e4 4599 if (task->tk_status > 0)
d45f60c6 4600 renew_lease(server, hdr->timestamp);
ec06c096 4601 return 0;
1da177e4
LT		 4602}
4603
5521abfd 4604static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4605 struct nfs_pgio_args *args)
5521abfd
TM		 4606{
4607
4608 if (!nfs4_error_stateid_expired(task->tk_status) ||
4609 nfs4_stateid_is_current(&args->stateid,
4610 args->context,
4611 args->lock_context,
4612 FMODE_READ))
4613 return false;
4614 rpc_restart_call_prepare(task);
4615 return true;
4616}
4617
d45f60c6 4618static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4619{
4620
4621 dprintk("--> %s\n", __func__);
4622
d45f60c6 4623 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4624 return -EAGAIN;
d45f60c6 4625 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4626 return -EAGAIN;
bfc505de
TM		 4627 if (task->tk_status > 0)
4628 nfs_invalidate_atime(hdr->inode);
d45f60c6
WAA		 4629 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4630 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4631}
4632
d45f60c6
WAA		 4633static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4634 struct rpc_message *msg)
1da177e4 4635{
d45f60c6 4636 hdr->timestamp = jiffies;
ca857cc1
TM		 4637 if (!hdr->pgio_done_cb)
4638 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4639 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4640 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4641}
4642
d45f60c6
WAA		 4643static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4644 struct nfs_pgio_header *hdr)
ea7c3303 4645{
d45f60c6
WAA		 4646 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4647 &hdr->args.seq_args,
4648 &hdr->res.seq_res,
9b206149 4649 task))
ef1820f9 4650 return 0;
d45f60c6
WAA		 4651 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4652 hdr->args.lock_context,
4653 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4654 return -EIO;
d45f60c6 4655 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4656 return -EIO;
4657 return 0;
1da177e4
LT		 4658}
4659
d45f60c6
WAA		 4660static int nfs4_write_done_cb(struct rpc_task *task,
4661 struct nfs_pgio_header *hdr)
1da177e4 4662{
d45f60c6 4663 struct inode *inode = hdr->inode;
8478eaa1 4664
d45f60c6 4665 trace_nfs4_write(hdr, task->tk_status);
9c27869d
TM		 4666 if (task->tk_status < 0) {
4667 struct nfs4_exception exception = {
4668 .inode = hdr->inode,
4669 .state = hdr->args.context->state,
4670 .stateid = &hdr->args.stateid,
4671 };
4672 task->tk_status = nfs4_async_handle_exception(task,
4673 NFS_SERVER(inode), task->tk_status,
4674 &exception);
4675 if (exception.retry) {
4676 rpc_restart_call_prepare(task);
4677 return -EAGAIN;
4678 }
1da177e4 4679 }
4f9838c7 4680 if (task->tk_status >= 0) {
d45f60c6 4681 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4682 nfs_writeback_update_inode(hdr);
4f9838c7 4683 }
788e7a89 4684 return 0;
1da177e4
LT		 4685}
4686
5521abfd 4687static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4688 struct nfs_pgio_args *args)
5521abfd
TM		 4689{
4690
4691 if (!nfs4_error_stateid_expired(task->tk_status) ||
4692 nfs4_stateid_is_current(&args->stateid,
4693 args->context,
4694 args->lock_context,
4695 FMODE_WRITE))
4696 return false;
4697 rpc_restart_call_prepare(task);
4698 return true;
4699}
4700
d45f60c6 4701static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4702{
d45f60c6 4703 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4704 return -EAGAIN;
d45f60c6 4705 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4706 return -EAGAIN;
d45f60c6
WAA		 4707 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4708 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4709}
4710
5a37f851 4711static
d45f60c6 4712bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4713{
5a37f851 4714 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4715 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4716 return false;
4717 /* Otherwise, request attributes if and only if we don't hold
4718 * a delegation
4719 */
011e2a7f 4720 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4721}
a69aef14 4722
d45f60c6
WAA		 4723static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4724 struct rpc_message *msg)
1da177e4 4725{
d45f60c6 4726 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4727
d45f60c6
WAA		 4728 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4729 hdr->args.bitmask = NULL;
4730 hdr->res.fattr = NULL;
7ffd1064 4731 } else
d45f60c6 4732 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4733
d45f60c6
WAA		 4734 if (!hdr->pgio_done_cb)
4735 hdr->pgio_done_cb = nfs4_write_done_cb;
4736 hdr->res.server = server;
4737 hdr->timestamp = jiffies;
1da177e4 4738
bdc7f021 4739 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4740 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4741}
4742
0b7c0153 4743static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4744{
d9afbd1b
TM		 4745 nfs4_setup_sequence(NFS_SERVER(data->inode),
4746 &data->args.seq_args,
4747 &data->res.seq_res,
4748 task);
1da177e4
LT		 4749}
4750
0b7c0153 4751static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4752{
1da177e4 4753 struct inode *inode = data->inode;
14516c3a 4754
cc668ab3 4755 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4756 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4757 NULL, NULL) == -EAGAIN) {
d00c5d43 4758 rpc_restart_call_prepare(task);
788e7a89 4759 return -EAGAIN;
1da177e4 4760 }
788e7a89 4761 return 0;
1da177e4
LT		 4762}
4763
0b7c0153 4764static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4765{
4766 if (!nfs4_sequence_done(task, &data->res.seq_res))
4767 return -EAGAIN;
0b7c0153 4768 return data->commit_done_cb(task, data);
5f452431
FI		 4769}
4770
0b7c0153 4771static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4772{
788e7a89 4773 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4774
0b7c0153
FI		 4775 if (data->commit_done_cb == NULL)
4776 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4777 data->res.server = server;
bdc7f021 4778 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4779 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4780}
4781
9bc4e3ca
CL		 4782struct nfs4_renewdata {
4783 struct nfs_client *client;
4784 unsigned long timestamp;
4785};
4786
1da177e4
LT		 4787/*
4788 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4789 * standalone procedure for queueing an asynchronous RENEW.
4790 */
9bc4e3ca 4791static void nfs4_renew_release(void *calldata)
dc96aef9 4792{
9bc4e3ca
CL		 4793 struct nfs4_renewdata *data = calldata;
4794 struct nfs_client *clp = data->client;
dc96aef9 4795
0851de06
AB		 4796 if (atomic_read(&clp->cl_count) > 1)
4797 nfs4_schedule_state_renewal(clp);
4798 nfs_put_client(clp);
9bc4e3ca 4799 kfree(data);
dc96aef9
AB		 4800}
4801
9bc4e3ca 4802static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4803{
9bc4e3ca
CL		 4804 struct nfs4_renewdata *data = calldata;
4805 struct nfs_client *clp = data->client;
4806 unsigned long timestamp = data->timestamp;
1da177e4 4807
c6d01c6f 4808 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4809 switch (task->tk_status) {
4810 case 0:
4811 break;
4812 case -NFS4ERR_LEASE_MOVED:
4813 nfs4_schedule_lease_moved_recovery(clp);
4814 break;
4815 default:
95baa25c 4816 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4817 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4818 return;
4819 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4820 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4821 return;
4822 }
4823 nfs4_schedule_path_down_recovery(clp);
1da177e4 4824 }
452e9352 4825 do_renew_lease(clp, timestamp);
1da177e4
LT		 4826}
4827
963d8fe5
TM		 4828static const struct rpc_call_ops nfs4_renew_ops = {
4829 .rpc_call_done = nfs4_renew_done,
dc96aef9 4830 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4831};
4832
2f60ea6b 4833static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4834{
4835 struct rpc_message msg = {
4836 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4837 .rpc_argp = clp,
b4454fe1 4838 .rpc_cred = cred,
1da177e4 4839 };
9bc4e3ca 4840 struct nfs4_renewdata *data;
1da177e4 4841
2f60ea6b
TM		 4842 if (renew_flags == 0)
4843 return 0;
0851de06
AB		 4844 if (!atomic_inc_not_zero(&clp->cl_count))
4845 return -EIO;
b569ad34 4846 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4847 if (data == NULL)
4848 return -ENOMEM;
4849 data->client = clp;
4850 data->timestamp = jiffies;
bc7a05ca 4851 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4852 &nfs4_renew_ops, data);
1da177e4
LT		 4853}
4854
8534d4ec 4855static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4856{
4857 struct rpc_message msg = {
4858 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4859 .rpc_argp = clp,
b4454fe1 4860 .rpc_cred = cred,
1da177e4
LT		 4861 };
4862 unsigned long now = jiffies;
4863 int status;
4864
bc7a05ca 4865 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4866 if (status < 0)
4867 return status;
452e9352 4868 do_renew_lease(clp, now);
1da177e4
LT		 4869 return 0;
4870}
4871
aa1870af
BF		 4872static inline int nfs4_server_supports_acls(struct nfs_server *server)
4873{
7dd7d959 4874 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4875}
4876
21f498c2
TM		 4877/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4878 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4879 * the stack.
4880 */
21f498c2 4881#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4882
e9e3d724 4883static int buf_to_pages_noslab(const void *buf, size_t buflen,
8fbcf237 4884 struct page **pages)
e9e3d724
NH		 4885{
4886 struct page *newpage, **spages;
4887 int rc = 0;
4888 size_t len;
4889 spages = pages;
4890
4891 do {
21f498c2 4892 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4893 newpage = alloc_page(GFP_KERNEL);
4894
4895 if (newpage == NULL)
4896 goto unwind;
4897 memcpy(page_address(newpage), buf, len);
4898 buf += len;
4899 buflen -= len;
4900 *pages++ = newpage;
4901 rc++;
4902 } while (buflen != 0);
4903
4904 return rc;
4905
4906unwind:
4907 for(; rc > 0; rc--)
4908 __free_page(spages[rc-1]);
4909 return -ENOMEM;
4910}
4911
e50a1c2e
BF		 4912struct nfs4_cached_acl {
4913 int cached;
4914 size_t len;
3e9d4154 4915 char data[0];
e50a1c2e
BF		 4916};
4917
4918static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4919{
4920 struct nfs_inode *nfsi = NFS_I(inode);
4921
4922 spin_lock(&inode->i_lock);
4923 kfree(nfsi->nfs4_acl);
4924 nfsi->nfs4_acl = acl;
4925 spin_unlock(&inode->i_lock);
4926}
4927
4928static void nfs4_zap_acl_attr(struct inode *inode)
4929{
4930 nfs4_set_cached_acl(inode, NULL);
4931}
4932
4933static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4934{
4935 struct nfs_inode *nfsi = NFS_I(inode);
4936 struct nfs4_cached_acl *acl;
4937 int ret = -ENOENT;
4938
4939 spin_lock(&inode->i_lock);
4940 acl = nfsi->nfs4_acl;
4941 if (acl == NULL)
4942 goto out;
4943 if (buf == NULL) /* user is just asking for length */
4944 goto out_len;
4945 if (acl->cached == 0)
4946 goto out;
4947 ret = -ERANGE; /* see getxattr(2) man page */
4948 if (acl->len > buflen)
4949 goto out;
4950 memcpy(buf, acl->data, acl->len);
4951out_len:
4952 ret = acl->len;
4953out:
4954 spin_unlock(&inode->i_lock);
4955 return ret;
4956}
4957
5794d21e 4958static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4959{
4960 struct nfs4_cached_acl *acl;
b291f1b1 4961 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4962
1f1ea6c2 4963 if (buflen <= PAGE_SIZE) {
b291f1b1 4964 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4965 if (acl == NULL)
4966 goto out;
4967 acl->cached = 1;
5794d21e 4968 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4969 } else {
4970 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4971 if (acl == NULL)
4972 goto out;
4973 acl->cached = 0;
4974 }
4975 acl->len = acl_len;
4976out:
4977 nfs4_set_cached_acl(inode, acl);
4978}
4979
bf118a34
AA		 4980/*
4981 * The getxattr API returns the required buffer length when called with a
4982 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4983 * the required buf. On a NULL buf, we send a page of data to the server
4984 * guessing that the ACL request can be serviced by a page. If so, we cache
4985 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4986 * the cache. If not so, we throw away the page, and cache the required
4987 * length. The next getxattr call will then produce another round trip to
4988 * the server, this time with the input buf of the required size.
4989 */
16b4289c 4990static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4991{
bf118a34 4992 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4993 struct nfs_getaclargs args = {
4994 .fh = NFS_FH(inode),
4995 .acl_pages = pages,
4996 .acl_len = buflen,
4997 };
663c79b3
BH		 4998 struct nfs_getaclres res = {
4999 .acl_len = buflen,
5000 };
aa1870af
BF		 5001 struct rpc_message msg = {
5002 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
5003 .rpc_argp = &args,
663c79b3 5004 .rpc_resp = &res,
aa1870af 5005 };
21f498c2
TM		 5006 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
5007 int ret = -ENOMEM, i;
aa1870af 5008
bf118a34
AA		 5009 /* As long as we're doing a round trip to the server anyway,
5010 * let's be prepared for a page of acl data. */
5011 if (npages == 0)
5012 npages = 1;
21f498c2
TM		 5013 if (npages > ARRAY_SIZE(pages))
5014 return -ERANGE;
5a006899 5015
bf118a34
AA		 5016 for (i = 0; i < npages; i++) {
5017 pages[i] = alloc_page(GFP_KERNEL);
5018 if (!pages[i])
5019 goto out_free;
e50a1c2e 5020 }
5a006899
SP		 5021
5022 /* for decoding across pages */
5023 res.acl_scratch = alloc_page(GFP_KERNEL);
5024 if (!res.acl_scratch)
5025 goto out_free;
5026
bf118a34 5027 args.acl_len = npages * PAGE_SIZE;
5a006899 5028
de040bec 5029 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 5030 __func__, buf, buflen, npages, args.acl_len);
5031 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
5032 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 5033 if (ret)
5034 goto out_free;
bf118a34 5035
1f1ea6c2
TM		 5036 /* Handle the case where the passed-in buffer is too short */
5037 if (res.acl_flags & NFS4_ACL_TRUNC) {
5038 /* Did the user only issue a request for the acl length? */
5039 if (buf == NULL)
5040 goto out_ok;
e50a1c2e 5041 ret = -ERANGE;
1f1ea6c2 5042 goto out_free;
e50a1c2e 5043 }
1f1ea6c2 5044 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 5045 if (buf) {
5046 if (res.acl_len > buflen) {
5047 ret = -ERANGE;
5048 goto out_free;
5049 }
1f1ea6c2 5050 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 5051 }
1f1ea6c2
TM		 5052out_ok:
5053 ret = res.acl_len;
e50a1c2e 5054out_free:
bf118a34
AA		 5055 for (i = 0; i < npages; i++)
5056 if (pages[i])
5057 __free_page(pages[i]);
331818f1
TM		 5058 if (res.acl_scratch)
5059 __free_page(res.acl_scratch);
aa1870af
BF		 5060 return ret;
5061}
5062
16b4289c
TM		 5063static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5064{
5065 struct nfs4_exception exception = { };
5066 ssize_t ret;
5067 do {
5068 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 5069 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 5070 if (ret >= 0)
5071 break;
5072 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
5073 } while (exception.retry);
5074 return ret;
5075}
5076
e50a1c2e
BF		 5077static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
5078{
5079 struct nfs_server *server = NFS_SERVER(inode);
5080 int ret;
5081
5082 if (!nfs4_server_supports_acls(server))
5083 return -EOPNOTSUPP;
5084 ret = nfs_revalidate_inode(server, inode);
5085 if (ret < 0)
5086 return ret;
08a22b39
AK		 5087 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
5088 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 5089 ret = nfs4_read_cached_acl(inode, buf, buflen);
5090 if (ret != -ENOENT)
bf118a34
AA		 5091 /* -ENOENT is returned if there is no ACL or if there is an ACL
5092 * but no cached acl data, just the acl length */
e50a1c2e
BF		 5093 return ret;
5094 return nfs4_get_acl_uncached(inode, buf, buflen);
5095}
5096
16b4289c 5097static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 5098{
5099 struct nfs_server *server = NFS_SERVER(inode);
5100 struct page *pages[NFS4ACL_MAXPAGES];
5101 struct nfs_setaclargs arg = {
5102 .fh = NFS_FH(inode),
5103 .acl_pages = pages,
5104 .acl_len = buflen,
5105 };
73c403a9 5106 struct nfs_setaclres res;
4b580ee3
BF		 5107 struct rpc_message msg = {
5108 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
5109 .rpc_argp = &arg,
73c403a9 5110 .rpc_resp = &res,
4b580ee3 5111 };
21f498c2 5112 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 5113 int ret, i;
4b580ee3
BF		 5114
5115 if (!nfs4_server_supports_acls(server))
5116 return -EOPNOTSUPP;
21f498c2
TM		 5117 if (npages > ARRAY_SIZE(pages))
5118 return -ERANGE;
8fbcf237 5119 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
e9e3d724
NH		 5120 if (i < 0)
5121 return i;
57ec14c5 5122 nfs4_inode_return_delegation(inode);
7c513058 5123 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 5124
5125 /*
5126 * Free each page after tx, so the only ref left is
5127 * held by the network stack
5128 */
5129 for (; i > 0; i--)
5130 put_page(pages[i-1]);
5131
08a22b39
AK		 5132 /*
5133 * Acl update can result in inode attribute update.
5134 * so mark the attribute cache invalid.
5135 */
5136 spin_lock(&inode->i_lock);
5137 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
5138 spin_unlock(&inode->i_lock);
f41f7418
TM		 5139 nfs_access_zap_cache(inode);
5140 nfs_zap_acl_cache(inode);
4b580ee3
BF		 5141 return ret;
5142}
5143
16b4289c
TM		 5144static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5145{
5146 struct nfs4_exception exception = { };
5147 int err;
5148 do {
c1578b76
TM		 5149 err = __nfs4_proc_set_acl(inode, buf, buflen);
5150 trace_nfs4_set_acl(inode, err);
5151 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 5152 &exception);
5153 } while (exception.retry);
5154 return err;
5155}
5156
aa9c2669
DQ		 5157#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5158static int _nfs4_get_security_label(struct inode *inode, void *buf,
5159 size_t buflen)
5160{
5161 struct nfs_server *server = NFS_SERVER(inode);
5162 struct nfs_fattr fattr;
5163 struct nfs4_label label = {0, 0, buflen, buf};
5164
5165 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 5166 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 5167 .fh = NFS_FH(inode),
5168 .bitmask = bitmask,
5169 };
5170 struct nfs4_getattr_res res = {
5171 .fattr = &fattr,
5172 .label = &label,
5173 .server = server,
5174 };
5175 struct rpc_message msg = {
5176 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 5177 .rpc_argp = &arg,
aa9c2669
DQ		 5178 .rpc_resp = &res,
5179 };
5180 int ret;
5181
5182 nfs_fattr_init(&fattr);
5183
fcb63a9b 5184 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 5185 if (ret)
5186 return ret;
5187 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
5188 return -ENOENT;
5189 if (buflen < label.len)
5190 return -ERANGE;
5191 return 0;
5192}
5193
5194static int nfs4_get_security_label(struct inode *inode, void *buf,
5195 size_t buflen)
5196{
5197 struct nfs4_exception exception = { };
5198 int err;
5199
5200 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5201 return -EOPNOTSUPP;
5202
5203 do {
c1578b76
TM		 5204 err = _nfs4_get_security_label(inode, buf, buflen);
5205 trace_nfs4_get_security_label(inode, err);
5206 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5207 &exception);
5208 } while (exception.retry);
5209 return err;
5210}
5211
5212static int _nfs4_do_set_security_label(struct inode *inode,
5213 struct nfs4_label *ilabel,
5214 struct nfs_fattr *fattr,
5215 struct nfs4_label *olabel)
5216{
5217
5218 struct iattr sattr = {0};
5219 struct nfs_server *server = NFS_SERVER(inode);
5220 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 5221 struct nfs_setattrargs arg = {
aa9c2669
DQ		 5222 .fh = NFS_FH(inode),
5223 .iap = &sattr,
5224 .server = server,
5225 .bitmask = bitmask,
5226 .label = ilabel,
5227 };
5228 struct nfs_setattrres res = {
5229 .fattr = fattr,
5230 .label = olabel,
5231 .server = server,
5232 };
5233 struct rpc_message msg = {
5234 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 5235 .rpc_argp = &arg,
aa9c2669
DQ		 5236 .rpc_resp = &res,
5237 };
5238 int status;
5239
12207f69 5240 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 5241
12207f69 5242 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 5243 if (status)
5244 dprintk("%s failed: %d\n", __func__, status);
5245
5246 return status;
5247}
5248
5249static int nfs4_do_set_security_label(struct inode *inode,
5250 struct nfs4_label *ilabel,
5251 struct nfs_fattr *fattr,
5252 struct nfs4_label *olabel)
5253{
5254 struct nfs4_exception exception = { };
5255 int err;
5256
5257 do {
c1578b76
TM		 5258 err = _nfs4_do_set_security_label(inode, ilabel,
5259 fattr, olabel);
5260 trace_nfs4_set_security_label(inode, err);
5261 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5262 &exception);
5263 } while (exception.retry);
5264 return err;
5265}
5266
5267static int
59301226 5268nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
aa9c2669
DQ		 5269{
5270 struct nfs4_label ilabel, *olabel = NULL;
5271 struct nfs_fattr fattr;
5272 struct rpc_cred *cred;
aa9c2669
DQ		 5273 int status;
5274
5275 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5276 return -EOPNOTSUPP;
5277
5278 nfs_fattr_init(&fattr);
5279
5280 ilabel.pi = 0;
5281 ilabel.lfs = 0;
5282 ilabel.label = (char *)buf;
5283 ilabel.len = buflen;
5284
5285 cred = rpc_lookup_cred();
5286 if (IS_ERR(cred))
5287 return PTR_ERR(cred);
5288
5289 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5290 if (IS_ERR(olabel)) {
5291 status = -PTR_ERR(olabel);
5292 goto out;
5293 }
5294
5295 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5296 if (status == 0)
5297 nfs_setsecurity(inode, &fattr, olabel);
5298
5299 nfs4_label_free(olabel);
5300out:
5301 put_rpccred(cred);
5302 return status;
5303}
5304#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5305
5306
f092075d
CL		 5307static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5308 nfs4_verifier *bootverf)
cd93710e
CL		 5309{
5310 __be32 verf[2];
5311
2c820d9a
CL		 5312 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5313 /* An impossible timestamp guarantees this value
5314 * will never match a generated boot time. */
2f86e091
DD		 5315 verf[0] = cpu_to_be32(U32_MAX);
5316 verf[1] = cpu_to_be32(U32_MAX);
2c820d9a 5317 } else {
f092075d 5318 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
2f86e091
DD		 5319 u64 ns = ktime_to_ns(nn->boot_time);
5320
5321 verf[0] = cpu_to_be32(ns >> 32);
5322 verf[1] = cpu_to_be32(ns);
2c820d9a 5323 }
cd93710e
CL		 5324 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5325}
5326
a3192688
JL		 5327static int
5328nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 5329{
a3192688
JL		 5330 size_t len;
5331 char *str;
e984a55a 5332
ceb3a16c 5333 if (clp->cl_owner_id != NULL)
a3192688 5334 return 0;
4a3e5779 5335
a3192688 5336 rcu_read_lock();
4a70316c 5337 len = 14 + strlen(clp->cl_ipaddr) + 1 +
a3192688
JL		 5338 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5339 1 +
5340 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5341 1;
5342 rcu_read_unlock();
5343
5344 if (len > NFS4_OPAQUE_LIMIT + 1)
5345 return -EINVAL;
5346
5347 /*
5348 * Since this string is allocated at mount time, and held until the
5349 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5350 * about a memory-reclaim deadlock.
5351 */
5352 str = kmalloc(len, GFP_KERNEL);
5353 if (!str)
5354 return -ENOMEM;
ceb3a16c 5355
e984a55a 5356 rcu_read_lock();
f2dd436e 5357 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
a3192688
JL		 5358 clp->cl_ipaddr,
5359 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5360 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5361 rcu_read_unlock();
a3192688 5362
a3192688
JL		 5363 clp->cl_owner_id = str;
5364 return 0;
e984a55a
CL		 5365}
5366
873e3851
JL		 5367static int
5368nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5369{
873e3851
JL		 5370 size_t len;
5371 char *str;
5372
5373 len = 10 + 10 + 1 + 10 + 1 +
5374 strlen(nfs4_client_id_uniquifier) + 1 +
5375 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5376
5377 if (len > NFS4_OPAQUE_LIMIT + 1)
5378 return -EINVAL;
5379
5380 /*
5381 * Since this string is allocated at mount time, and held until the
5382 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5383 * about a memory-reclaim deadlock.
5384 */
5385 str = kmalloc(len, GFP_KERNEL);
5386 if (!str)
5387 return -ENOMEM;
5388
f2dd436e 5389 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
873e3851
JL		 5390 clp->rpc_ops->version, clp->cl_minorversion,
5391 nfs4_client_id_uniquifier,
5392 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5393 clp->cl_owner_id = str;
5394 return 0;
5395}
5396
5397static int
5398nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5399{
873e3851
JL		 5400 size_t len;
5401 char *str;
ceb3a16c
TM		 5402
5403 if (clp->cl_owner_id != NULL)
873e3851 5404 return 0;
6f2ea7f2
CL		 5405
5406 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5407 return nfs4_init_uniquifier_client_string(clp);
5408
5409 len = 10 + 10 + 1 + 10 + 1 +
5410 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5411
5412 if (len > NFS4_OPAQUE_LIMIT + 1)
5413 return -EINVAL;
5414
5415 /*
5416 * Since this string is allocated at mount time, and held until the
5417 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5418 * about a memory-reclaim deadlock.
5419 */
5420 str = kmalloc(len, GFP_KERNEL);
5421 if (!str)
5422 return -ENOMEM;
5423
f2dd436e 5424 scnprintf(str, len, "Linux NFSv%u.%u %s",
873e3851
JL		 5425 clp->rpc_ops->version, clp->cl_minorversion,
5426 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5427 clp->cl_owner_id = str;
5428 return 0;
e984a55a
CL		 5429}
5430
706cb8db
CL		 5431/*
5432 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5433 * services. Advertise one based on the address family of the
5434 * clientaddr.
5435 */
5436static unsigned int
5437nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5438{
5439 if (strchr(clp->cl_ipaddr, ':') != NULL)
5440 return scnprintf(buf, len, "tcp6");
5441 else
5442 return scnprintf(buf, len, "tcp");
5443}
5444
f11b2a1c
JL		 5445static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5446{
5447 struct nfs4_setclientid *sc = calldata;
5448
5449 if (task->tk_status == 0)
5450 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5451}
5452
5453static const struct rpc_call_ops nfs4_setclientid_ops = {
5454 .rpc_call_done = nfs4_setclientid_done,
5455};
5456
6bbb4ae8
CL		 5457/**
5458 * nfs4_proc_setclientid - Negotiate client ID
5459 * @clp: state data structure
5460 * @program: RPC program for NFSv4 callback service
5461 * @port: IP port number for NFS4 callback service
5462 * @cred: RPC credential to use for this call
5463 * @res: where to place the result
5464 *
5465 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5466 */
bb8b27e5
TM		 5467int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5468 unsigned short port, struct rpc_cred *cred,
5469 struct nfs4_setclientid_res *res)
1da177e4
LT		 5470{
5471 nfs4_verifier sc_verifier;
5472 struct nfs4_setclientid setclientid = {
5473 .sc_verifier = &sc_verifier,
5474 .sc_prog = program,
3a6bb738 5475 .sc_clnt = clp,
1da177e4
LT		 5476 };
5477 struct rpc_message msg = {
5478 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5479 .rpc_argp = &setclientid,
bb8b27e5 5480 .rpc_resp = res,
286d7d6a 5481 .rpc_cred = cred,
1da177e4 5482 };
f11b2a1c
JL		 5483 struct rpc_task *task;
5484 struct rpc_task_setup task_setup_data = {
5485 .rpc_client = clp->cl_rpcclient,
5486 .rpc_message = &msg,
5487 .callback_ops = &nfs4_setclientid_ops,
5488 .callback_data = &setclientid,
5489 .flags = RPC_TASK_TIMEOUT,
5490 };
6bbb4ae8 5491 int status;
1da177e4 5492
de734831 5493 /* nfs_client_id4 */
f092075d 5494 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5495
5496 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5497 status = nfs4_init_uniform_client_string(clp);
5498 else
a3192688 5499 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5500
5501 if (status)
5502 goto out;
3a6bb738 5503
de734831 5504 /* cb_client4 */
706cb8db
CL		 5505 setclientid.sc_netid_len =
5506 nfs4_init_callback_netid(clp,
5507 setclientid.sc_netid,
5508 sizeof(setclientid.sc_netid));
de734831 5509 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5510 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5511 clp->cl_ipaddr, port >> 8, port & 255);
5512
3a6bb738 5513 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5514 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5515 clp->cl_owner_id);
f11b2a1c
JL		 5516 task = rpc_run_task(&task_setup_data);
5517 if (IS_ERR(task)) {
5518 status = PTR_ERR(task);
5519 goto out;
5520 }
5521 status = task->tk_status;
5522 if (setclientid.sc_cred) {
5523 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5524 put_rpccred(setclientid.sc_cred);
5525 }
5526 rpc_put_task(task);
5527out:
c6d01c6f 5528 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5529 dprintk("NFS reply setclientid: %d\n", status);
5530 return status;
1da177e4
LT		 5531}
5532
6bbb4ae8
CL		 5533/**
5534 * nfs4_proc_setclientid_confirm - Confirm client ID
5535 * @clp: state data structure
5536 * @res: result of a previous SETCLIENTID
5537 * @cred: RPC credential to use for this call
5538 *
5539 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5540 */
fd954ae1 5541int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5542 struct nfs4_setclientid_res *arg,
5543 struct rpc_cred *cred)
1da177e4 5544{
1da177e4
LT		 5545 struct rpc_message msg = {
5546 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5547 .rpc_argp = arg,
286d7d6a 5548 .rpc_cred = cred,
1da177e4 5549 };
1da177e4
LT		 5550 int status;
5551
6bbb4ae8
CL		 5552 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5553 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5554 clp->cl_clientid);
1bd714f2 5555 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5556 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5557 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5558 return status;
5559}
5560
fe650407
TM		 5561struct nfs4_delegreturndata {
5562 struct nfs4_delegreturnargs args;
fa178f29 5563 struct nfs4_delegreturnres res;
fe650407
TM		 5564 struct nfs_fh fh;
5565 nfs4_stateid stateid;
26e976a8 5566 unsigned long timestamp;
fa178f29 5567 struct nfs_fattr fattr;
fe650407 5568 int rpc_status;
039b756a
PT		 5569 struct inode *inode;
5570 bool roc;
5571 u32 roc_barrier;
fe650407
TM		 5572};
5573
fe650407
TM		 5574static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5575{
5576 struct nfs4_delegreturndata *data = calldata;
938e1010 5577
14516c3a
TM		 5578 if (!nfs4_sequence_done(task, &data->res.seq_res))
5579 return;
938e1010 5580
ca8acf8d 5581 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5582 switch (task->tk_status) {
79708861 5583 case 0:
fa178f29 5584 renew_lease(data->res.server, data->timestamp);
23ea44c2 5585 break;
c97cf606
TM		 5586 case -NFS4ERR_ADMIN_REVOKED:
5587 case -NFS4ERR_DELEG_REVOKED:
26d36301
TM		 5588 case -NFS4ERR_EXPIRED:
5589 nfs4_free_revoked_stateid(data->res.server,
5590 data->args.stateid,
5591 task->tk_msg.rpc_cred);
c97cf606
TM		 5592 case -NFS4ERR_BAD_STATEID:
5593 case -NFS4ERR_OLD_STATEID:
5594 case -NFS4ERR_STALE_STATEID:
c97cf606
TM		 5595 task->tk_status = 0;
5596 break;
79708861 5597 default:
8478eaa1
N		 5598 if (nfs4_async_handle_error(task, data->res.server,
5599 NULL, NULL) == -EAGAIN) {
d00c5d43 5600 rpc_restart_call_prepare(task);
79708861
RL		 5601 return;
5602 }
5603 }
5604 data->rpc_status = task->tk_status;
23ea44c2
TM		 5605 if (data->roc && data->rpc_status == 0)
5606 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
fe650407
TM		 5607}
5608
5609static void nfs4_delegreturn_release(void *calldata)
5610{
039b756a 5611 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5612 struct inode *inode = data->inode;
039b756a 5613
ea7c38fe
TM		 5614 if (inode) {
5615 if (data->roc)
5616 pnfs_roc_release(inode);
5617 nfs_iput_and_deactive(inode);
5618 }
fe650407
TM		 5619 kfree(calldata);
5620}
5621
938e1010
AA		 5622static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5623{
5624 struct nfs4_delegreturndata *d_data;
5625
5626 d_data = (struct nfs4_delegreturndata *)data;
5627
500d701f
PT		 5628 if (nfs4_wait_on_layoutreturn(d_data->inode, task))
5629 return;
5630
4ff376fe
TM		 5631 if (d_data->roc)
5632 pnfs_roc_get_barrier(d_data->inode, &d_data->roc_barrier);
039b756a 5633
d9afbd1b
TM		 5634 nfs4_setup_sequence(d_data->res.server,
5635 &d_data->args.seq_args,
5636 &d_data->res.seq_res,
5637 task);
938e1010 5638}
938e1010 5639
c8d149f3 5640static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5641 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5642 .rpc_call_done = nfs4_delegreturn_done,
5643 .rpc_release = nfs4_delegreturn_release,
5644};
5645
e6f81075 5646static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5647{
5648 struct nfs4_delegreturndata *data;
fa178f29 5649 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5650 struct rpc_task *task;
5138fde0
TM		 5651 struct rpc_message msg = {
5652 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5653 .rpc_cred = cred,
5654 };
c970aa85
TM		 5655 struct rpc_task_setup task_setup_data = {
5656 .rpc_client = server->client,
5138fde0 5657 .rpc_message = &msg,
c970aa85
TM		 5658 .callback_ops = &nfs4_delegreturn_ops,
5659 .flags = RPC_TASK_ASYNC,
5660 };
e6f81075 5661 int status = 0;
fe650407 5662
8535b2be 5663 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5664 if (data == NULL)
5665 return -ENOMEM;
a9c92d6b 5666 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
99ade3c7
AE		 5667
5668 nfs4_state_protect(server->nfs_client,
5669 NFS_SP4_MACH_CRED_CLEANUP,
5670 &task_setup_data.rpc_client, &msg);
5671
fe650407
TM		 5672 data->args.fhandle = &data->fh;
5673 data->args.stateid = &data->stateid;
9e907fec 5674 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5675 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5676 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5677 data->res.fattr = &data->fattr;
5678 data->res.server = server;
5138fde0 5679 nfs_fattr_init(data->res.fattr);
26e976a8 5680 data->timestamp = jiffies;
fe650407 5681 data->rpc_status = 0;
ea7c38fe
TM		 5682 data->inode = nfs_igrab_and_active(inode);
5683 if (data->inode)
5684 data->roc = nfs4_roc(inode);
fe650407 5685
c970aa85 5686 task_setup_data.callback_data = data;
1174dd1f
TM		 5687 msg.rpc_argp = &data->args;
5688 msg.rpc_resp = &data->res;
c970aa85 5689 task = rpc_run_task(&task_setup_data);
7a1218a2 5690 if (IS_ERR(task))
fe650407 5691 return PTR_ERR(task);
e6f81075
TM		 5692 if (!issync)
5693 goto out;
fe650407 5694 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5695 if (status != 0)
5696 goto out;
5697 status = data->rpc_status;
e144cbcc
TM		 5698 if (status == 0)
5699 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5700 else
5701 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5702out:
e6b3c4db 5703 rpc_put_task(task);
fe650407 5704 return status;
1da177e4
LT		 5705}
5706
e6f81075 5707int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5708{
5709 struct nfs_server *server = NFS_SERVER(inode);
5710 struct nfs4_exception exception = { };
5711 int err;
5712 do {
e6f81075 5713 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
48c9579a 5714 trace_nfs4_delegreturn(inode, stateid, err);
1da177e4
LT		 5715 switch (err) {
5716 case -NFS4ERR_STALE_STATEID:
5717 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5718 case 0:
5719 return 0;
5720 }
5721 err = nfs4_handle_exception(server, err, &exception);
5722 } while (exception.retry);
5723 return err;
5724}
5725
1da177e4
LT		 5726static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5727{
5728 struct inode *inode = state->inode;
5729 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5730 struct nfs_client *clp = server->nfs_client;
911d1aaf 5731 struct nfs_lockt_args arg = {
1da177e4 5732 .fh = NFS_FH(inode),
911d1aaf 5733 .fl = request,
1da177e4 5734 };
911d1aaf
TM		 5735 struct nfs_lockt_res res = {
5736 .denied = request,
1da177e4
LT		 5737 };
5738 struct rpc_message msg = {
5739 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5740 .rpc_argp = &arg,
5741 .rpc_resp = &res,
5742 .rpc_cred = state->owner->so_cred,
5743 };
1da177e4
LT		 5744 struct nfs4_lock_state *lsp;
5745 int status;
5746
911d1aaf 5747 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5748 status = nfs4_set_lock_state(state, request);
5749 if (status != 0)
5750 goto out;
5751 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5752 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5753 arg.lock_owner.s_dev = server->s_dev;
7c513058 5754 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5755 switch (status) {
5756 case 0:
5757 request->fl_type = F_UNLCK;
5758 break;
5759 case -NFS4ERR_DENIED:
5760 status = 0;
1da177e4 5761 }
70cc6487 5762 request->fl_ops->fl_release_private(request);
a6f951dd 5763 request->fl_ops = NULL;
8d0a8a9d 5764out:
1da177e4
LT		 5765 return status;
5766}
5767
5768static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5769{
5770 struct nfs4_exception exception = { };
5771 int err;
5772
5773 do {
d1b748a5
TM		 5774 err = _nfs4_proc_getlk(state, cmd, request);
5775 trace_nfs4_get_lock(request, state, cmd, err);
5776 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5777 &exception);
5778 } while (exception.retry);
5779 return err;
5780}
5781
faf5f49c 5782struct nfs4_unlockdata {
911d1aaf
TM		 5783 struct nfs_locku_args arg;
5784 struct nfs_locku_res res;
faf5f49c
TM		 5785 struct nfs4_lock_state *lsp;
5786 struct nfs_open_context *ctx;
911d1aaf 5787 struct file_lock fl;
516285eb 5788 struct nfs_server *server;
26e976a8 5789 unsigned long timestamp;
faf5f49c
TM		 5790};
5791
911d1aaf
TM		 5792static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5793 struct nfs_open_context *ctx,
5794 struct nfs4_lock_state *lsp,
5795 struct nfs_seqid *seqid)
5796{
5797 struct nfs4_unlockdata *p;
5798 struct inode *inode = lsp->ls_state->inode;
5799
8535b2be 5800 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5801 if (p == NULL)
5802 return NULL;
5803 p->arg.fh = NFS_FH(inode);
5804 p->arg.fl = &p->fl;
5805 p->arg.seqid = seqid;
c1d51931 5806 p->res.seqid = seqid;
911d1aaf
TM		 5807 p->lsp = lsp;
5808 atomic_inc(&lsp->ls_count);
5809 /* Ensure we don't close file until we're done freeing locks! */
5810 p->ctx = get_nfs_open_context(ctx);
5811 memcpy(&p->fl, fl, sizeof(p->fl));
5812 p->server = NFS_SERVER(inode);
5813 return p;
5814}
5815
06f814a3 5816static void nfs4_locku_release_calldata(void *data)
faf5f49c 5817{
963d8fe5 5818 struct nfs4_unlockdata *calldata = data;
911d1aaf 5819 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5820 nfs4_put_lock_state(calldata->lsp);
5821 put_nfs_open_context(calldata->ctx);
5822 kfree(calldata);
faf5f49c
TM		 5823}
5824
963d8fe5 5825static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5826{
963d8fe5 5827 struct nfs4_unlockdata *calldata = data;
faf5f49c 5828
14516c3a
TM		 5829 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5830 return;
faf5f49c
TM		 5831 switch (task->tk_status) {
5832 case 0:
26e976a8 5833 renew_lease(calldata->server, calldata->timestamp);
75575ddf 5834 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 5835 if (nfs4_update_lock_stateid(calldata->lsp,
5836 &calldata->res.stateid))
5837 break;
26d36301
TM		 5838 case -NFS4ERR_ADMIN_REVOKED:
5839 case -NFS4ERR_EXPIRED:
5840 nfs4_free_revoked_stateid(calldata->server,
5841 &calldata->arg.stateid,
5842 task->tk_msg.rpc_cred);
9e33bed5
TM		 5843 case -NFS4ERR_BAD_STATEID:
5844 case -NFS4ERR_OLD_STATEID:
faf5f49c 5845 case -NFS4ERR_STALE_STATEID:
425c1d4e
TM		 5846 if (!nfs4_stateid_match(&calldata->arg.stateid,
5847 &calldata->lsp->ls_stateid))
5848 rpc_restart_call_prepare(task);
faf5f49c
TM		 5849 break;
5850 default:
8478eaa1
N		 5851 if (nfs4_async_handle_error(task, calldata->server,
5852 NULL, NULL) == -EAGAIN)
d00c5d43 5853 rpc_restart_call_prepare(task);
faf5f49c 5854 }
2b1bc308 5855 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5856}
5857
4ce70ada 5858static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5859{
4ce70ada 5860 struct nfs4_unlockdata *calldata = data;
faf5f49c 5861
911d1aaf 5862 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5863 goto out_wait;
425c1d4e 5864 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5865 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5866 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5867 goto out_no_action;
faf5f49c 5868 }
26e976a8 5869 calldata->timestamp = jiffies;
035168ab 5870 if (nfs4_setup_sequence(calldata->server,
a893693c 5871 &calldata->arg.seq_args,
2240a9e2
TM		 5872 &calldata->res.seq_res,
5873 task) != 0)
5874 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5875 return;
5876out_no_action:
5877 task->tk_action = NULL;
5878out_wait:
5879 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5880}
5881
963d8fe5 5882static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5883 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5884 .rpc_call_done = nfs4_locku_done,
06f814a3 5885 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5886};
5887
a5d16a4d
TM		 5888static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5889 struct nfs_open_context *ctx,
5890 struct nfs4_lock_state *lsp,
5891 struct nfs_seqid *seqid)
5892{
5893 struct nfs4_unlockdata *data;
5138fde0
TM		 5894 struct rpc_message msg = {
5895 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5896 .rpc_cred = ctx->cred,
5897 };
c970aa85
TM		 5898 struct rpc_task_setup task_setup_data = {
5899 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5900 .rpc_message = &msg,
c970aa85 5901 .callback_ops = &nfs4_locku_ops,
101070ca 5902 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5903 .flags = RPC_TASK_ASYNC,
5904 };
a5d16a4d 5905
fa940720
WAA		 5906 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5907 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5908
137d6aca
FF		 5909 /* Ensure this is an unlock - when canceling a lock, the
5910 * canceled lock is passed in, and it won't be an unlock.
5911 */
5912 fl->fl_type = F_UNLCK;
5913
a5d16a4d
TM		 5914 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5915 if (data == NULL) {
5916 nfs_free_seqid(seqid);
5917 return ERR_PTR(-ENOMEM);
5918 }
5919
a9c92d6b 5920 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5921 msg.rpc_argp = &data->arg;
5922 msg.rpc_resp = &data->res;
c970aa85
TM		 5923 task_setup_data.callback_data = data;
5924 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5925}
5926
faf5f49c
TM		 5927static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5928{
65b62a29
TM		 5929 struct inode *inode = state->inode;
5930 struct nfs4_state_owner *sp = state->owner;
5931 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5932 struct nfs_seqid *seqid;
1da177e4 5933 struct nfs4_lock_state *lsp;
06f814a3 5934 struct rpc_task *task;
b4019c0e 5935 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 5936 int status = 0;
536ff0f8 5937 unsigned char fl_flags = request->fl_flags;
faf5f49c 5938
8d0a8a9d 5939 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5940 /* Unlock _before_ we do the RPC call */
5941 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5942 /* Exclude nfs_delegation_claim_locks() */
5943 mutex_lock(&sp->so_delegreturn_mutex);
5944 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 5945 down_read(&nfsi->rwsem);
75575ddf 5946 if (locks_lock_inode_wait(inode, request) == -ENOENT) {
19e03c57 5947 up_read(&nfsi->rwsem);
65b62a29 5948 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5949 goto out;
19e03c57
TM		 5950 }
5951 up_read(&nfsi->rwsem);
65b62a29 5952 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5953 if (status != 0)
9b073574
TM		 5954 goto out;
5955 /* Is this a delegated lock? */
8d0a8a9d 5956 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5957 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5958 goto out;
b4019c0e
TM		 5959 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5960 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5961 status = -ENOMEM;
badc76dd 5962 if (IS_ERR(seqid))
9b073574 5963 goto out;
cd3758e3 5964 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5965 status = PTR_ERR(task);
5966 if (IS_ERR(task))
9b073574 5967 goto out;
a5d16a4d 5968 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5969 rpc_put_task(task);
9b073574 5970out:
536ff0f8 5971 request->fl_flags = fl_flags;
d1b748a5 5972 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5973 return status;
5974}
5975
a5d16a4d
TM		 5976struct nfs4_lockdata {
5977 struct nfs_lock_args arg;
5978 struct nfs_lock_res res;
5979 struct nfs4_lock_state *lsp;
5980 struct nfs_open_context *ctx;
5981 struct file_lock fl;
26e976a8 5982 unsigned long timestamp;
a5d16a4d
TM		 5983 int rpc_status;
5984 int cancelled;
66179efe 5985 struct nfs_server *server;
a5d16a4d
TM		 5986};
5987
5988static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5989 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5990 gfp_t gfp_mask)
1da177e4 5991{
a5d16a4d
TM		 5992 struct nfs4_lockdata *p;
5993 struct inode *inode = lsp->ls_state->inode;
1da177e4 5994 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 5995 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 5996
8535b2be 5997 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5998 if (p == NULL)
5999 return NULL;
6000
6001 p->arg.fh = NFS_FH(inode);
6002 p->arg.fl = &p->fl;
8535b2be 6003 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 6004 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 6005 goto out_free;
b4019c0e
TM		 6006 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
6007 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 6008 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 6009 goto out_free_seqid;
7539bbab 6010 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 6011 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 6012 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 6013 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 6014 p->lsp = lsp;
66179efe 6015 p->server = server;
a5d16a4d
TM		 6016 atomic_inc(&lsp->ls_count);
6017 p->ctx = get_nfs_open_context(ctx);
feaff8e5 6018 get_file(fl->fl_file);
a5d16a4d
TM		 6019 memcpy(&p->fl, fl, sizeof(p->fl));
6020 return p;
2f74c0a0
TM		 6021out_free_seqid:
6022 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 6023out_free:
6024 kfree(p);
6025 return NULL;
6026}
6027
6028static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
6029{
6030 struct nfs4_lockdata *data = calldata;
6031 struct nfs4_state *state = data->lsp->ls_state;
06735b34 6032
3110ff80 6033 dprintk("%s: begin!\n", __func__);
2f74c0a0 6034 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 6035 goto out_wait;
a5d16a4d 6036 /* Do we need to do an open_to_lock_owner? */
6b447539 6037 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 6038 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 6039 goto out_release_lock_seqid;
8fe72bac 6040 }
425c1d4e
TM		 6041 nfs4_stateid_copy(&data->arg.open_stateid,
6042 &state->open_stateid);
a5d16a4d 6043 data->arg.new_lock_owner = 1;
c1d51931 6044 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 6045 } else {
2f74c0a0 6046 data->arg.new_lock_owner = 0;
425c1d4e
TM		 6047 nfs4_stateid_copy(&data->arg.lock_stateid,
6048 &data->lsp->ls_stateid);
6049 }
5d422301
TM		 6050 if (!nfs4_valid_open_stateid(state)) {
6051 data->rpc_status = -EBADF;
6052 task->tk_action = NULL;
6053 goto out_release_open_seqid;
6054 }
26e976a8 6055 data->timestamp = jiffies;
035168ab
TM		 6056 if (nfs4_setup_sequence(data->server,
6057 &data->arg.seq_args,
2240a9e2 6058 &data->res.seq_res,
d9afbd1b 6059 task) == 0)
66179efe 6060 return;
5d422301 6061out_release_open_seqid:
2240a9e2
TM		 6062 nfs_release_seqid(data->arg.open_seqid);
6063out_release_lock_seqid:
6064 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 6065out_wait:
6066 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 6067 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 6068}
6069
a5d16a4d
TM		 6070static void nfs4_lock_done(struct rpc_task *task, void *calldata)
6071{
6072 struct nfs4_lockdata *data = calldata;
39071e6f 6073 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 6074
3110ff80 6075 dprintk("%s: begin!\n", __func__);
a5d16a4d 6076
14516c3a
TM		 6077 if (!nfs4_sequence_done(task, &data->res.seq_res))
6078 return;
66179efe 6079
a5d16a4d 6080 data->rpc_status = task->tk_status;
425c1d4e
TM		 6081 switch (task->tk_status) {
6082 case 0:
2b0143b5 6083 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 6084 data->timestamp);
c69899a1
TM		 6085 if (data->arg.new_lock) {
6086 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
75575ddf 6087 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) {
c69899a1
TM		 6088 rpc_restart_call_prepare(task);
6089 break;
6090 }
6091 }
39071e6f
TM		 6092 if (data->arg.new_lock_owner != 0) {
6093 nfs_confirm_seqid(&lsp->ls_seqid, 0);
6094 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
6095 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6096 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
6097 rpc_restart_call_prepare(task);
425c1d4e
TM		 6098 break;
6099 case -NFS4ERR_BAD_STATEID:
6100 case -NFS4ERR_OLD_STATEID:
6101 case -NFS4ERR_STALE_STATEID:
6102 case -NFS4ERR_EXPIRED:
6103 if (data->arg.new_lock_owner != 0) {
6104 if (!nfs4_stateid_match(&data->arg.open_stateid,
6105 &lsp->ls_state->open_stateid))
6106 rpc_restart_call_prepare(task);
6107 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
6108 &lsp->ls_stateid))
6109 rpc_restart_call_prepare(task);
a5d16a4d 6110 }
3110ff80 6111 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 6112}
6113
6114static void nfs4_lock_release(void *calldata)
6115{
6116 struct nfs4_lockdata *data = calldata;
6117
3110ff80 6118 dprintk("%s: begin!\n", __func__);
2f74c0a0 6119 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 6120 if (data->cancelled != 0) {
6121 struct rpc_task *task;
6122 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
6123 data->arg.lock_seqid);
6124 if (!IS_ERR(task))
bf294b41 6125 rpc_put_task_async(task);
3110ff80 6126 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 6127 } else
6128 nfs_free_seqid(data->arg.lock_seqid);
6129 nfs4_put_lock_state(data->lsp);
6130 put_nfs_open_context(data->ctx);
feaff8e5 6131 fput(data->fl.fl_file);
a5d16a4d 6132 kfree(data);
3110ff80 6133 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 6134}
6135
6136static const struct rpc_call_ops nfs4_lock_ops = {
6137 .rpc_call_prepare = nfs4_lock_prepare,
6138 .rpc_call_done = nfs4_lock_done,
6139 .rpc_release = nfs4_lock_release,
6140};
6141
2bee72a6
TM		 6142static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
6143{
2bee72a6
TM		 6144 switch (error) {
6145 case -NFS4ERR_ADMIN_REVOKED:
d7f3e4bf 6146 case -NFS4ERR_EXPIRED:
2bee72a6 6147 case -NFS4ERR_BAD_STATEID:
ecac799a 6148 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 6149 if (new_lock_owner != 0 ||
795a88c9 6150 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 6151 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 6152 break;
6153 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 6154 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a 6155 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 6156 };
6157}
6158
afe6c27c 6159static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 6160{
6161 struct nfs4_lockdata *data;
6162 struct rpc_task *task;
5138fde0
TM		 6163 struct rpc_message msg = {
6164 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
6165 .rpc_cred = state->owner->so_cred,
6166 };
c970aa85
TM		 6167 struct rpc_task_setup task_setup_data = {
6168 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 6169 .rpc_message = &msg,
c970aa85 6170 .callback_ops = &nfs4_lock_ops,
101070ca 6171 .workqueue = nfsiod_workqueue,
c970aa85
TM		 6172 .flags = RPC_TASK_ASYNC,
6173 };
a5d16a4d
TM		 6174 int ret;
6175
3110ff80 6176 dprintk("%s: begin!\n", __func__);
cd3758e3 6177 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 6178 fl->fl_u.nfs4_fl.owner,
6179 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 6180 if (data == NULL)
6181 return -ENOMEM;
6182 if (IS_SETLKW(cmd))
6183 data->arg.block = 1;
a9c92d6b 6184 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 6185 msg.rpc_argp = &data->arg;
6186 msg.rpc_resp = &data->res;
c970aa85 6187 task_setup_data.callback_data = data;
8fe72bac
TM		 6188 if (recovery_type > NFS_LOCK_NEW) {
6189 if (recovery_type == NFS_LOCK_RECLAIM)
6190 data->arg.reclaim = NFS_LOCK_RECLAIM;
6191 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 6192 } else
6193 data->arg.new_lock = 1;
c970aa85 6194 task = rpc_run_task(&task_setup_data);
7a1218a2 6195 if (IS_ERR(task))
a5d16a4d 6196 return PTR_ERR(task);
a5d16a4d
TM		 6197 ret = nfs4_wait_for_completion_rpc_task(task);
6198 if (ret == 0) {
6199 ret = data->rpc_status;
2bee72a6
TM		 6200 if (ret)
6201 nfs4_handle_setlk_error(data->server, data->lsp,
6202 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 6203 } else
6204 data->cancelled = 1;
e6b3c4db 6205 rpc_put_task(task);
3110ff80 6206 dprintk("%s: done, ret = %d!\n", __func__, ret);
48c9579a 6207 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
a5d16a4d 6208 return ret;
1da177e4
LT		 6209}
6210
6211static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
6212{
202b50dc 6213 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6214 struct nfs4_exception exception = {
6215 .inode = state->inode,
6216 };
202b50dc
TM		 6217 int err;
6218
6219 do {
42a2d13e
TM		 6220 /* Cache the lock if possible... */
6221 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6222 return 0;
afe6c27c 6223 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 6224 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 6225 break;
6226 nfs4_handle_exception(server, err, &exception);
6227 } while (exception.retry);
6228 return err;
1da177e4
LT		 6229}
6230
6231static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
6232{
202b50dc 6233 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6234 struct nfs4_exception exception = {
6235 .inode = state->inode,
6236 };
202b50dc
TM		 6237 int err;
6238
6bfc93ef
TM		 6239 err = nfs4_set_lock_state(state, request);
6240 if (err != 0)
6241 return err;
f6de7a39 6242 if (!recover_lost_locks) {
ef1820f9
N		 6243 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
6244 return 0;
6245 }
202b50dc 6246 do {
42a2d13e
TM		 6247 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6248 return 0;
afe6c27c 6249 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 6250 switch (err) {
6251 default:
6252 goto out;
6253 case -NFS4ERR_GRACE:
6254 case -NFS4ERR_DELAY:
6255 nfs4_handle_exception(server, err, &exception);
6256 err = 0;
6257 }
202b50dc 6258 } while (exception.retry);
a9ed2e25 6259out:
202b50dc 6260 return err;
1da177e4
LT		 6261}
6262
f062eb6c 6263#if defined(CONFIG_NFS_V4_1)
b01dd1d8
BS		 6264static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6265{
c5896fc8
TM		 6266 struct nfs4_lock_state *lsp;
6267 int status;
b01dd1d8 6268
c5896fc8
TM		 6269 status = nfs4_set_lock_state(state, request);
6270 if (status != 0)
6271 return status;
6272 lsp = request->fl_u.nfs4_fl.owner;
6273 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) ||
6274 test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
6275 return 0;
6276 status = nfs4_lock_expired(state, request);
eb64cf96 6277 return status;
f062eb6c
BS		 6278}
6279#endif
6280
1da177e4
LT		 6281static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6282{
19e03c57 6283 struct nfs_inode *nfsi = NFS_I(state->inode);
11476e9d 6284 struct nfs4_state_owner *sp = state->owner;
01c3b861 6285 unsigned char fl_flags = request->fl_flags;
1ea67dbd 6286 int status;
1da177e4 6287
01c3b861 6288 request->fl_flags |= FL_ACCESS;
75575ddf 6289 status = locks_lock_inode_wait(state->inode, request);
01c3b861
TM		 6290 if (status < 0)
6291 goto out;
11476e9d 6292 mutex_lock(&sp->so_delegreturn_mutex);
19e03c57 6293 down_read(&nfsi->rwsem);
01c3b861 6294 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6295 /* Yes: cache locks! */
01c3b861 6296 /* ...but avoid races with delegation recall... */
19e03c57 6297 request->fl_flags = fl_flags & ~FL_SLEEP;
75575ddf 6298 status = locks_lock_inode_wait(state->inode, request);
c69899a1 6299 up_read(&nfsi->rwsem);
11476e9d 6300 mutex_unlock(&sp->so_delegreturn_mutex);
9a99af49 6301 goto out;
9a99af49 6302 }
19e03c57 6303 up_read(&nfsi->rwsem);
11476e9d 6304 mutex_unlock(&sp->so_delegreturn_mutex);
c69899a1 6305 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6306out:
6307 request->fl_flags = fl_flags;
1da177e4
LT		 6308 return status;
6309}
6310
6311static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6312{
a1d0b5ee
TM		 6313 struct nfs4_exception exception = {
6314 .state = state,
05ffe24f 6315 .inode = state->inode,
a1d0b5ee 6316 };
1da177e4
LT		 6317 int err;
6318
6319 do {
965b5d67
TM		 6320 err = _nfs4_proc_setlk(state, cmd, request);
6321 if (err == -NFS4ERR_DENIED)
6322 err = -EAGAIN;
1da177e4 6323 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6324 err, &exception);
1da177e4
LT		 6325 } while (exception.retry);
6326 return err;
6327}
6328
d2f3a7f9
JL		 6329#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
6330#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
6331
6332static int
a1d617d8
JL		 6333nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd,
6334 struct file_lock *request)
d2f3a7f9
JL		 6335{
6336 int status = -ERESTARTSYS;
6337 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6338
6339 while(!signalled()) {
6340 status = nfs4_proc_setlk(state, cmd, request);
6341 if ((status != -EAGAIN) || IS_SETLK(cmd))
6342 break;
6343 freezable_schedule_timeout_interruptible(timeout);
6344 timeout *= 2;
6345 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout);
6346 status = -ERESTARTSYS;
6347 }
6348 return status;
6349}
6350
a1d617d8
JL		 6351#ifdef CONFIG_NFS_V4_1
6352struct nfs4_lock_waiter {
6353 struct task_struct *task;
6354 struct inode *inode;
6355 struct nfs_lowner *owner;
6356 bool notified;
6357};
6358
6359static int
6360nfs4_wake_lock_waiter(wait_queue_t *wait, unsigned int mode, int flags, void *key)
6361{
6362 int ret;
6363 struct cb_notify_lock_args *cbnl = key;
6364 struct nfs4_lock_waiter *waiter = wait->private;
6365 struct nfs_lowner *lowner = &cbnl->cbnl_owner,
6366 *wowner = waiter->owner;
6367
6368 /* Only wake if the callback was for the same owner */
6369 if (lowner->clientid != wowner->clientid ||
6370 lowner->id != wowner->id ||
6371 lowner->s_dev != wowner->s_dev)
6372 return 0;
6373
6374 /* Make sure it's for the right inode */
6375 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
6376 return 0;
6377
6378 waiter->notified = true;
6379
6380 /* override "private" so we can use default_wake_function */
6381 wait->private = waiter->task;
6382 ret = autoremove_wake_function(wait, mode, flags, key);
6383 wait->private = waiter;
6384 return ret;
6385}
6386
6387static int
6388nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6389{
6390 int status = -ERESTARTSYS;
6391 unsigned long flags;
6392 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
6393 struct nfs_server *server = NFS_SERVER(state->inode);
6394 struct nfs_client *clp = server->nfs_client;
6395 wait_queue_head_t *q = &clp->cl_lock_waitq;
6396 struct nfs_lowner owner = { .clientid = clp->cl_clientid,
6397 .id = lsp->ls_seqid.owner_id,
6398 .s_dev = server->s_dev };
6399 struct nfs4_lock_waiter waiter = { .task = current,
6400 .inode = state->inode,
6401 .owner = &owner,
6402 .notified = false };
6403 wait_queue_t wait;
6404
6405 /* Don't bother with waitqueue if we don't expect a callback */
6406 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags))
6407 return nfs4_retry_setlk_simple(state, cmd, request);
6408
6409 init_wait(&wait);
6410 wait.private = &waiter;
6411 wait.func = nfs4_wake_lock_waiter;
6412 add_wait_queue(q, &wait);
6413
6414 while(!signalled()) {
6415 status = nfs4_proc_setlk(state, cmd, request);
6416 if ((status != -EAGAIN) || IS_SETLK(cmd))
6417 break;
6418
6419 status = -ERESTARTSYS;
6420 spin_lock_irqsave(&q->lock, flags);
6421 if (waiter.notified) {
6422 spin_unlock_irqrestore(&q->lock, flags);
6423 continue;
6424 }
6425 set_current_state(TASK_INTERRUPTIBLE);
6426 spin_unlock_irqrestore(&q->lock, flags);
6427
6428 freezable_schedule_timeout_interruptible(NFS4_LOCK_MAXTIMEOUT);
6429 }
6430
6431 finish_wait(q, &wait);
6432 return status;
6433}
6434#else /* !CONFIG_NFS_V4_1 */
6435static inline int
6436nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6437{
6438 return nfs4_retry_setlk_simple(state, cmd, request);
6439}
6440#endif
6441
1da177e4
LT		 6442static int
6443nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6444{
6445 struct nfs_open_context *ctx;
6446 struct nfs4_state *state;
1da177e4
LT		 6447 int status;
6448
6449 /* verify open state */
cd3758e3 6450 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6451 state = ctx->state;
6452
6453 if (request->fl_start < 0 || request->fl_end < 0)
6454 return -EINVAL;
6455
d953126a
TM		 6456 if (IS_GETLK(cmd)) {
6457 if (state != NULL)
6458 return nfs4_proc_getlk(state, F_GETLK, request);
6459 return 0;
6460 }
1da177e4
LT		 6461
6462 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6463 return -EINVAL;
6464
d953126a
TM		 6465 if (request->fl_type == F_UNLCK) {
6466 if (state != NULL)
6467 return nfs4_proc_unlck(state, cmd, request);
6468 return 0;
6469 }
1da177e4 6470
d953126a
TM		 6471 if (state == NULL)
6472 return -ENOLCK;
1ea67dbd
JL		 6473
6474 if ((request->fl_flags & FL_POSIX) &&
6475 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6476 return -ENOLCK;
6477
55725513
TM		 6478 /*
6479 * Don't rely on the VFS having checked the file open mode,
6480 * since it won't do this for flock() locks.
6481 */
f44106e2 6482 switch (request->fl_type) {
55725513
TM		 6483 case F_RDLCK:
6484 if (!(filp->f_mode & FMODE_READ))
6485 return -EBADF;
6486 break;
6487 case F_WRLCK:
6488 if (!(filp->f_mode & FMODE_WRITE))
6489 return -EBADF;
6490 }
6491
1ea67dbd
JL		 6492 status = nfs4_set_lock_state(state, request);
6493 if (status != 0)
6494 return status;
6495
d2f3a7f9 6496 return nfs4_retry_setlk(state, cmd, request);
1da177e4
LT		 6497}
6498
db4f2e63 6499int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6500{
6501 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6502 int err;
6503
6504 err = nfs4_set_lock_state(state, fl);
6505 if (err != 0)
db4f2e63 6506 return err;
4a706fa0 6507 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6508 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6509}
6b3b5496 6510
cf470c3e
TM		 6511struct nfs_release_lockowner_data {
6512 struct nfs4_lock_state *lsp;
5ae67c4f 6513 struct nfs_server *server;
cf470c3e 6514 struct nfs_release_lockowner_args args;
b7e63a10 6515 struct nfs_release_lockowner_res res;
60ea6812 6516 unsigned long timestamp;
cf470c3e
TM		 6517};
6518
fbd4bfd1
CL		 6519static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6520{
6521 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6522 struct nfs_server *server = data->server;
cb04ad2a
PT		 6523 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6524 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6525 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6526 data->timestamp = jiffies;
fbd4bfd1
CL		 6527}
6528
6529static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6530{
6531 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6532 struct nfs_server *server = data->server;
6533
b7e63a10 6534 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6535
6536 switch (task->tk_status) {
6537 case 0:
6538 renew_lease(server, data->timestamp);
6539 break;
6540 case -NFS4ERR_STALE_CLIENTID:
6541 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6542 nfs4_schedule_lease_recovery(server->nfs_client);
6543 break;
60ea6812
CL		 6544 case -NFS4ERR_LEASE_MOVED:
6545 case -NFS4ERR_DELAY:
8478eaa1
N		 6546 if (nfs4_async_handle_error(task, server,
6547 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6548 rpc_restart_call_prepare(task);
6549 }
fbd4bfd1
CL		 6550}
6551
d3c7b7cc
TM		 6552static void nfs4_release_lockowner_release(void *calldata)
6553{
cf470c3e 6554 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6555 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6556 kfree(calldata);
6557}
6558
17280175 6559static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6560 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6561 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6562 .rpc_release = nfs4_release_lockowner_release,
6563};
6564
f1cdae87
JL		 6565static void
6566nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6567{
cf470c3e 6568 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6569 struct rpc_message msg = {
6570 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6571 };
6572
6573 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6574 return;
fbd4bfd1 6575
cf470c3e
TM		 6576 data = kmalloc(sizeof(*data), GFP_NOFS);
6577 if (!data)
f1cdae87 6578 return;
cf470c3e 6579 data->lsp = lsp;
5ae67c4f 6580 data->server = server;
cf470c3e
TM		 6581 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6582 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6583 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6584
cf470c3e 6585 msg.rpc_argp = &data->args;
b7e63a10
TM		 6586 msg.rpc_resp = &data->res;
6587 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6588 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6589}
6590
aa1870af
BF		 6591#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6592
d9a82a04 6593static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
59301226
AV		 6594 struct dentry *unused, struct inode *inode,
6595 const char *key, const void *buf,
6596 size_t buflen, int flags)
6b3b5496 6597{
59301226 6598 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 6599}
6600
d9a82a04 6601static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
b296821a
AV		 6602 struct dentry *unused, struct inode *inode,
6603 const char *key, void *buf, size_t buflen)
6b3b5496 6604{
b296821a 6605 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 6606}
6607
764a5c6b 6608static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6b3b5496 6609{
764a5c6b 6610 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6b3b5496
BF		 6611}
6612
c9bccef6 6613#ifdef CONFIG_NFS_V4_SECURITY_LABEL
c9bccef6 6614
d9a82a04 6615static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
59301226
AV		 6616 struct dentry *unused, struct inode *inode,
6617 const char *key, const void *buf,
6618 size_t buflen, int flags)
c9bccef6
DQ		 6619{
6620 if (security_ismaclabel(key))
59301226 6621 return nfs4_set_security_label(inode, buf, buflen);
c9bccef6
DQ		 6622
6623 return -EOPNOTSUPP;
6624}
6625
d9a82a04 6626static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
b296821a
AV		 6627 struct dentry *unused, struct inode *inode,
6628 const char *key, void *buf, size_t buflen)
c9bccef6
DQ		 6629{
6630 if (security_ismaclabel(key))
b296821a 6631 return nfs4_get_security_label(inode, buf, buflen);
c9bccef6
DQ		 6632 return -EOPNOTSUPP;
6633}
6634
c4803c49
AG		 6635static ssize_t
6636nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
c9bccef6 6637{
c4803c49 6638 int len = 0;
c9bccef6 6639
c4803c49
AG		 6640 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
6641 len = security_inode_listsecurity(inode, list, list_len);
6642 if (list_len && len > list_len)
6643 return -ERANGE;
c9bccef6
DQ		 6644 }
6645 return len;
6646}
6647
6648static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6649 .prefix = XATTR_SECURITY_PREFIX,
c9bccef6
DQ		 6650 .get = nfs4_xattr_get_nfs4_label,
6651 .set = nfs4_xattr_set_nfs4_label,
6652};
c9bccef6 6653
c4803c49
AG		 6654#else
6655
6656static ssize_t
6657nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6658{
6659 return 0;
6660}
6661
6662#endif
c9bccef6 6663
533eb461
AA		 6664/*
6665 * nfs_fhget will use either the mounted_on_fileid or the fileid
6666 */
69aaaae1
TM		 6667static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6668{
533eb461
AA		 6669 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6670 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6671 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6672 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6673 return;
6674
6675 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6676 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6677 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6678 fattr->nlink = 2;
6679}
6680
f05d147f
BS		 6681static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6682 const struct qstr *name,
6683 struct nfs4_fs_locations *fs_locations,
6684 struct page *page)
683b57b4
TM		 6685{
6686 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6687 u32 bitmask[3] = {
361e624f 6688 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6689 };
6690 struct nfs4_fs_locations_arg args = {
6691 .dir_fh = NFS_FH(dir),
c228fd3a 6692 .name = name,
683b57b4
TM		 6693 .page = page,
6694 .bitmask = bitmask,
6695 };
22958463
BH		 6696 struct nfs4_fs_locations_res res = {
6697 .fs_locations = fs_locations,
6698 };
683b57b4
TM		 6699 struct rpc_message msg = {
6700 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6701 .rpc_argp = &args,
22958463 6702 .rpc_resp = &res,
683b57b4
TM		 6703 };
6704 int status;
6705
3110ff80 6706 dprintk("%s: start\n", __func__);
533eb461
AA		 6707
6708 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6709 * is not supported */
6710 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6711 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6712 else
6713 bitmask[0] |= FATTR4_WORD0_FILEID;
6714
c228fd3a 6715 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6716 fs_locations->server = server;
830b8e33 6717 fs_locations->nlocations = 0;
f05d147f 6718 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6719 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6720 return status;
6721}
6722
f05d147f
BS		 6723int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6724 const struct qstr *name,
6725 struct nfs4_fs_locations *fs_locations,
6726 struct page *page)
db0a9593
BS		 6727{
6728 struct nfs4_exception exception = { };
6729 int err;
6730 do {
078ea3df
TM		 6731 err = _nfs4_proc_fs_locations(client, dir, name,
6732 fs_locations, page);
6733 trace_nfs4_get_fs_locations(dir, name, err);
6734 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6735 &exception);
6736 } while (exception.retry);
6737 return err;
6738}
6739
b03d735b
CL		 6740/*
6741 * This operation also signals the server that this client is
6742 * performing migration recovery. The server can stop returning
6743 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6744 * appended to this compound to identify the client ID which is
6745 * performing recovery.
6746 */
6747static int _nfs40_proc_get_locations(struct inode *inode,
6748 struct nfs4_fs_locations *locations,
6749 struct page *page, struct rpc_cred *cred)
6750{
6751 struct nfs_server *server = NFS_SERVER(inode);
6752 struct rpc_clnt *clnt = server->client;
6753 u32 bitmask[2] = {
6754 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6755 };
6756 struct nfs4_fs_locations_arg args = {
6757 .clientid = server->nfs_client->cl_clientid,
6758 .fh = NFS_FH(inode),
6759 .page = page,
6760 .bitmask = bitmask,
6761 .migration = 1, /* skip LOOKUP */
6762 .renew = 1, /* append RENEW */
6763 };
6764 struct nfs4_fs_locations_res res = {
6765 .fs_locations = locations,
6766 .migration = 1,
6767 .renew = 1,
6768 };
6769 struct rpc_message msg = {
6770 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6771 .rpc_argp = &args,
6772 .rpc_resp = &res,
6773 .rpc_cred = cred,
6774 };
6775 unsigned long now = jiffies;
6776 int status;
6777
6778 nfs_fattr_init(&locations->fattr);
6779 locations->server = server;
6780 locations->nlocations = 0;
6781
6782 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6783 nfs4_set_sequence_privileged(&args.seq_args);
6784 status = nfs4_call_sync_sequence(clnt, server, &msg,
6785 &args.seq_args, &res.seq_res);
6786 if (status)
6787 return status;
6788
6789 renew_lease(server, now);
6790 return 0;
6791}
6792
6793#ifdef CONFIG_NFS_V4_1
6794
6795/*
6796 * This operation also signals the server that this client is
6797 * performing migration recovery. The server can stop asserting
6798 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6799 * performing this operation is identified in the SEQUENCE
6800 * operation in this compound.
6801 *
6802 * When the client supports GETATTR(fs_locations_info), it can
6803 * be plumbed in here.
6804 */
6805static int _nfs41_proc_get_locations(struct inode *inode,
6806 struct nfs4_fs_locations *locations,
6807 struct page *page, struct rpc_cred *cred)
6808{
6809 struct nfs_server *server = NFS_SERVER(inode);
6810 struct rpc_clnt *clnt = server->client;
6811 u32 bitmask[2] = {
6812 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6813 };
6814 struct nfs4_fs_locations_arg args = {
6815 .fh = NFS_FH(inode),
6816 .page = page,
6817 .bitmask = bitmask,
6818 .migration = 1, /* skip LOOKUP */
6819 };
6820 struct nfs4_fs_locations_res res = {
6821 .fs_locations = locations,
6822 .migration = 1,
6823 };
6824 struct rpc_message msg = {
6825 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6826 .rpc_argp = &args,
6827 .rpc_resp = &res,
6828 .rpc_cred = cred,
6829 };
6830 int status;
6831
6832 nfs_fattr_init(&locations->fattr);
6833 locations->server = server;
6834 locations->nlocations = 0;
6835
6836 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6837 nfs4_set_sequence_privileged(&args.seq_args);
6838 status = nfs4_call_sync_sequence(clnt, server, &msg,
6839 &args.seq_args, &res.seq_res);
6840 if (status == NFS4_OK &&
6841 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6842 status = -NFS4ERR_LEASE_MOVED;
6843 return status;
6844}
6845
6846#endif /* CONFIG_NFS_V4_1 */
6847
6848/**
6849 * nfs4_proc_get_locations - discover locations for a migrated FSID
6850 * @inode: inode on FSID that is migrating
6851 * @locations: result of query
6852 * @page: buffer
6853 * @cred: credential to use for this operation
6854 *
6855 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6856 * operation failed, or a negative errno if a local error occurred.
6857 *
6858 * On success, "locations" is filled in, but if the server has
6859 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6860 * asserted.
6861 *
6862 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6863 * from this client that require migration recovery.
6864 */
6865int nfs4_proc_get_locations(struct inode *inode,
6866 struct nfs4_fs_locations *locations,
6867 struct page *page, struct rpc_cred *cred)
6868{
6869 struct nfs_server *server = NFS_SERVER(inode);
6870 struct nfs_client *clp = server->nfs_client;
6871 const struct nfs4_mig_recovery_ops *ops =
6872 clp->cl_mvops->mig_recovery_ops;
6873 struct nfs4_exception exception = { };
6874 int status;
6875
6876 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6877 (unsigned long long)server->fsid.major,
6878 (unsigned long long)server->fsid.minor,
6879 clp->cl_hostname);
6880 nfs_display_fhandle(NFS_FH(inode), __func__);
6881
6882 do {
6883 status = ops->get_locations(inode, locations, page, cred);
6884 if (status != -NFS4ERR_DELAY)
6885 break;
6886 nfs4_handle_exception(server, status, &exception);
6887 } while (exception.retry);
6888 return status;
6889}
6890
44c99933
CL		 6891/*
6892 * This operation also signals the server that this client is
6893 * performing "lease moved" recovery. The server can stop
6894 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6895 * is appended to this compound to identify the client ID which is
6896 * performing recovery.
6897 */
6898static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6899{
6900 struct nfs_server *server = NFS_SERVER(inode);
6901 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6902 struct rpc_clnt *clnt = server->client;
6903 struct nfs4_fsid_present_arg args = {
6904 .fh = NFS_FH(inode),
6905 .clientid = clp->cl_clientid,
6906 .renew = 1, /* append RENEW */
6907 };
6908 struct nfs4_fsid_present_res res = {
6909 .renew = 1,
6910 };
6911 struct rpc_message msg = {
6912 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6913 .rpc_argp = &args,
6914 .rpc_resp = &res,
6915 .rpc_cred = cred,
6916 };
6917 unsigned long now = jiffies;
6918 int status;
6919
6920 res.fh = nfs_alloc_fhandle();
6921 if (res.fh == NULL)
6922 return -ENOMEM;
6923
6924 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6925 nfs4_set_sequence_privileged(&args.seq_args);
6926 status = nfs4_call_sync_sequence(clnt, server, &msg,
6927 &args.seq_args, &res.seq_res);
6928 nfs_free_fhandle(res.fh);
6929 if (status)
6930 return status;
6931
6932 do_renew_lease(clp, now);
6933 return 0;
6934}
6935
6936#ifdef CONFIG_NFS_V4_1
6937
6938/*
6939 * This operation also signals the server that this client is
6940 * performing "lease moved" recovery. The server can stop asserting
6941 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6942 * this operation is identified in the SEQUENCE operation in this
6943 * compound.
6944 */
6945static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6946{
6947 struct nfs_server *server = NFS_SERVER(inode);
6948 struct rpc_clnt *clnt = server->client;
6949 struct nfs4_fsid_present_arg args = {
6950 .fh = NFS_FH(inode),
6951 };
6952 struct nfs4_fsid_present_res res = {
6953 };
6954 struct rpc_message msg = {
6955 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6956 .rpc_argp = &args,
6957 .rpc_resp = &res,
6958 .rpc_cred = cred,
6959 };
6960 int status;
6961
6962 res.fh = nfs_alloc_fhandle();
6963 if (res.fh == NULL)
6964 return -ENOMEM;
6965
6966 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6967 nfs4_set_sequence_privileged(&args.seq_args);
6968 status = nfs4_call_sync_sequence(clnt, server, &msg,
6969 &args.seq_args, &res.seq_res);
6970 nfs_free_fhandle(res.fh);
6971 if (status == NFS4_OK &&
6972 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6973 status = -NFS4ERR_LEASE_MOVED;
6974 return status;
6975}
6976
6977#endif /* CONFIG_NFS_V4_1 */
6978
6979/**
6980 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6981 * @inode: inode on FSID to check
6982 * @cred: credential to use for this operation
6983 *
6984 * Server indicates whether the FSID is present, moved, or not
6985 * recognized. This operation is necessary to clear a LEASE_MOVED
6986 * condition for this client ID.
6987 *
6988 * Returns NFS4_OK if the FSID is present on this server,
6989 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6990 * NFS4ERR code if some error occurred on the server, or a
6991 * negative errno if a local failure occurred.
6992 */
6993int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6994{
6995 struct nfs_server *server = NFS_SERVER(inode);
6996 struct nfs_client *clp = server->nfs_client;
6997 const struct nfs4_mig_recovery_ops *ops =
6998 clp->cl_mvops->mig_recovery_ops;
6999 struct nfs4_exception exception = { };
7000 int status;
7001
7002 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
7003 (unsigned long long)server->fsid.major,
7004 (unsigned long long)server->fsid.minor,
7005 clp->cl_hostname);
7006 nfs_display_fhandle(NFS_FH(inode), __func__);
7007
7008 do {
7009 status = ops->fsid_present(inode, cred);
7010 if (status != -NFS4ERR_DELAY)
7011 break;
7012 nfs4_handle_exception(server, status, &exception);
7013 } while (exception.retry);
7014 return status;
7015}
7016
5ec16a85 7017/**
a5250def
WAA		 7018 * If 'use_integrity' is true and the state managment nfs_client
7019 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
7020 * and the machine credential as per RFC3530bis and RFC5661 Security
7021 * Considerations sections. Otherwise, just use the user cred with the
7022 * filesystem's rpc_client.
5ec16a85 7023 */
a5250def 7024static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 7025{
7026 int status;
7027 struct nfs4_secinfo_arg args = {
7028 .dir_fh = NFS_FH(dir),
7029 .name = name,
7030 };
7031 struct nfs4_secinfo_res res = {
7032 .flavors = flavors,
7033 };
7034 struct rpc_message msg = {
7035 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
7036 .rpc_argp = &args,
7037 .rpc_resp = &res,
7038 };
a5250def 7039 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 7040 struct rpc_cred *cred = NULL;
a5250def
WAA		 7041
7042 if (use_integrity) {
7043 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 7044 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
7045 msg.rpc_cred = cred;
a5250def 7046 }
5a5ea0d4
BS		 7047
7048 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 7049
7050 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
7051 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
7052
a5250def
WAA		 7053 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
7054 &res.seq_res, 0);
5a5ea0d4 7055 dprintk("NFS reply secinfo: %d\n", status);
a5250def 7056
7cb852df
WAA		 7057 if (cred)
7058 put_rpccred(cred);
a5250def 7059
5a5ea0d4
BS		 7060 return status;
7061}
7062
72de53ec
BS		 7063int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
7064 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 7065{
7066 struct nfs4_exception exception = { };
7067 int err;
7068 do {
a5250def
WAA		 7069 err = -NFS4ERR_WRONGSEC;
7070
7071 /* try to use integrity protection with machine cred */
7072 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
7073 err = _nfs4_proc_secinfo(dir, name, flavors, true);
7074
7075 /*
7076 * if unable to use integrity protection, or SECINFO with
7077 * integrity protection returns NFS4ERR_WRONGSEC (which is
7078 * disallowed by spec, but exists in deployed servers) use
7079 * the current filesystem's rpc_client and the user cred.
7080 */
7081 if (err == -NFS4ERR_WRONGSEC)
7082 err = _nfs4_proc_secinfo(dir, name, flavors, false);
7083
078ea3df
TM		 7084 trace_nfs4_secinfo(dir, name, err);
7085 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 7086 &exception);
7087 } while (exception.retry);
7088 return err;
7089}
7090
557134a3 7091#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 7092/*
7093 * Check the exchange flags returned by the server for invalid flags, having
7094 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
7095 * DS flags set.
7096 */
7097static int nfs4_check_cl_exchange_flags(u32 flags)
7098{
7099 if (flags & ~EXCHGID4_FLAG_MASK_R)
7100 goto out_inval;
7101 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
7102 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
7103 goto out_inval;
7104 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
7105 goto out_inval;
7106 return NFS_OK;
7107out_inval:
7108 return -NFS4ERR_INVAL;
7109}
7110
78fe0f41 7111static bool
79d4e1f0
CL		 7112nfs41_same_server_scope(struct nfs41_server_scope *a,
7113 struct nfs41_server_scope *b)
78fe0f41
WAA		 7114{
7115 if (a->server_scope_sz == b->server_scope_sz &&
7116 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
7117 return true;
7118
7119 return false;
7120}
7121
02a95dee
AA		 7122static void
7123nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
7124{
7125}
7126
7127static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
7128 .rpc_call_done = &nfs4_bind_one_conn_to_session_done,
7129};
7130
7c44f1ae 7131/*
d9ddbf5d 7132 * nfs4_proc_bind_one_conn_to_session()
7c44f1ae
WAA		 7133 *
7134 * The 4.1 client currently uses the same TCP connection for the
7135 * fore and backchannel.
7136 */
d9ddbf5d
TM		 7137static
7138int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
7139 struct rpc_xprt *xprt,
7140 struct nfs_client *clp,
7141 struct rpc_cred *cred)
7c44f1ae
WAA		 7142{
7143 int status;
71a097c6
TM		 7144 struct nfs41_bind_conn_to_session_args args = {
7145 .client = clp,
7146 .dir = NFS4_CDFC4_FORE_OR_BOTH,
7147 };
7c44f1ae
WAA		 7148 struct nfs41_bind_conn_to_session_res res;
7149 struct rpc_message msg = {
7150 .rpc_proc =
7151 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 7152 .rpc_argp = &args,
7c44f1ae 7153 .rpc_resp = &res,
2cf047c9 7154 .rpc_cred = cred,
7c44f1ae 7155 };
d9ddbf5d
TM		 7156 struct rpc_task_setup task_setup_data = {
7157 .rpc_client = clnt,
7158 .rpc_xprt = xprt,
02a95dee 7159 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
d9ddbf5d
TM		 7160 .rpc_message = &msg,
7161 .flags = RPC_TASK_TIMEOUT,
7162 };
7163 struct rpc_task *task;
7c44f1ae
WAA		 7164
7165 dprintk("--> %s\n", __func__);
7c44f1ae 7166
71a097c6
TM		 7167 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
7168 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
7169 args.dir = NFS4_CDFC4_FORE;
7c44f1ae 7170
d9ddbf5d
TM		 7171 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
7172 if (xprt != rcu_access_pointer(clnt->cl_xprt))
7173 args.dir = NFS4_CDFC4_FORE;
7174
7175 task = rpc_run_task(&task_setup_data);
7176 if (!IS_ERR(task)) {
7177 status = task->tk_status;
7178 rpc_put_task(task);
7179 } else
7180 status = PTR_ERR(task);
c6d01c6f 7181 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 7182 if (status == 0) {
71a097c6 7183 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 7184 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
7185 dprintk("NFS: %s: Session ID mismatch\n", __func__);
7186 status = -EIO;
71a097c6 7187 goto out;
7c44f1ae 7188 }
71a097c6 7189 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 7190 dprintk("NFS: %s: Unexpected direction from server\n",
7191 __func__);
7192 status = -EIO;
71a097c6 7193 goto out;
7c44f1ae 7194 }
71a097c6 7195 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 7196 dprintk("NFS: %s: Server returned RDMA mode = true\n",
7197 __func__);
7198 status = -EIO;
71a097c6 7199 goto out;
7c44f1ae
WAA		 7200 }
7201 }
7c44f1ae
WAA		 7202out:
7203 dprintk("<-- %s status= %d\n", __func__, status);
7204 return status;
7205}
7206
d9ddbf5d
TM		 7207struct rpc_bind_conn_calldata {
7208 struct nfs_client *clp;
7209 struct rpc_cred *cred;
7210};
7211
7212static int
7213nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
7214 struct rpc_xprt *xprt,
7215 void *calldata)
7216{
7217 struct rpc_bind_conn_calldata *p = calldata;
7218
7219 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
7220}
7221
7222int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7223{
7224 struct rpc_bind_conn_calldata data = {
7225 .clp = clp,
7226 .cred = cred,
7227 };
7228 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
7229 nfs4_proc_bind_conn_to_session_callback, &data);
7230}
7231
99fe60d0 7232/*
fa940720
WAA		 7233 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
7234 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 7235 */
7236static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
7237 .how = SP4_MACH_CRED,
7238 .enforce.u.words = {
7239 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7240 1 << (OP_EXCHANGE_ID - 32) |
7241 1 << (OP_CREATE_SESSION - 32) |
7242 1 << (OP_DESTROY_SESSION - 32) |
7243 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 7244 },
7245 .allow.u.words = {
7246 [0] = 1 << (OP_CLOSE) |
99ade3c7 7247 1 << (OP_OPEN_DOWNGRADE) |
a0279625 7248 1 << (OP_LOCKU) |
99ade3c7 7249 1 << (OP_DELEGRETURN) |
a0279625 7250 1 << (OP_COMMIT),
8b5bee2e 7251 [1] = 1 << (OP_SECINFO - 32) |
3787d506 7252 1 << (OP_SECINFO_NO_NAME - 32) |
99ade3c7 7253 1 << (OP_LAYOUTRETURN - 32) |
3787d506 7254 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 7255 1 << (OP_FREE_STATEID - 32) |
7256 1 << (OP_WRITE - 32)
2031cd1a
WAA		 7257 }
7258};
7259
7260/*
7261 * Select the state protection mode for client `clp' given the server results
7262 * from exchange_id in `sp'.
99fe60d0 7263 *
2031cd1a
WAA		 7264 * Returns 0 on success, negative errno otherwise.
7265 */
7266static int nfs4_sp4_select_mode(struct nfs_client *clp,
7267 struct nfs41_state_protection *sp)
7268{
7269 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
7270 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7271 1 << (OP_EXCHANGE_ID - 32) |
7272 1 << (OP_CREATE_SESSION - 32) |
7273 1 << (OP_DESTROY_SESSION - 32) |
7274 1 << (OP_DESTROY_CLIENTID - 32)
7275 };
7276 unsigned int i;
7277
7278 if (sp->how == SP4_MACH_CRED) {
7279 /* Print state protect result */
7280 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
7281 for (i = 0; i <= LAST_NFS4_OP; i++) {
7282 if (test_bit(i, sp->enforce.u.longs))
7283 dfprintk(MOUNT, " enforce op %d\n", i);
7284 if (test_bit(i, sp->allow.u.longs))
7285 dfprintk(MOUNT, " allow op %d\n", i);
7286 }
7287
7288 /* make sure nothing is on enforce list that isn't supported */
7289 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
7290 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
7291 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7292 return -EINVAL;
7293 }
7294 }
7295
7296 /*
7297 * Minimal mode - state operations are allowed to use machine
7298 * credential. Note this already happens by default, so the
7299 * client doesn't have to do anything more than the negotiation.
7300 *
7301 * NOTE: we don't care if EXCHANGE_ID is in the list -
7302 * we're already using the machine cred for exchange_id
7303 * and will never use a different cred.
7304 */
7305 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
7306 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
7307 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
7308 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
7309 dfprintk(MOUNT, "sp4_mach_cred:\n");
7310 dfprintk(MOUNT, " minimal mode enabled\n");
7311 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
7312 } else {
7313 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7314 return -EINVAL;
7315 }
fa940720
WAA		 7316
7317 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
99ade3c7
AE		 7318 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
7319 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
fa940720
WAA		 7320 test_bit(OP_LOCKU, sp->allow.u.longs)) {
7321 dfprintk(MOUNT, " cleanup mode enabled\n");
7322 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
7323 }
8b5bee2e 7324
99ade3c7
AE		 7325 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
7326 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
7327 set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP,
7328 &clp->cl_sp4_flags);
7329 }
7330
8b5bee2e
WAA		 7331 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
7332 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
7333 dfprintk(MOUNT, " secinfo mode enabled\n");
7334 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
7335 }
3787d506
WAA		 7336
7337 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
7338 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
7339 dfprintk(MOUNT, " stateid mode enabled\n");
7340 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
7341 }
8c21c62c
WAA		 7342
7343 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
7344 dfprintk(MOUNT, " write mode enabled\n");
7345 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
7346 }
7347
7348 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
7349 dfprintk(MOUNT, " commit mode enabled\n");
7350 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
7351 }
2031cd1a
WAA		 7352 }
7353
7354 return 0;
7355}
7356
8d89bd70
AA		 7357struct nfs41_exchange_id_data {
7358 struct nfs41_exchange_id_res res;
7359 struct nfs41_exchange_id_args args;
ad0849a7 7360 struct rpc_xprt *xprt;
8d89bd70
AA		 7361 int rpc_status;
7362};
7363
7364static void nfs4_exchange_id_done(struct rpc_task *task, void *data)
7365{
7366 struct nfs41_exchange_id_data *cdata =
7367 (struct nfs41_exchange_id_data *)data;
7368 struct nfs_client *clp = cdata->args.client;
7369 int status = task->tk_status;
7370
7371 trace_nfs4_exchange_id(clp, status);
7372
7373 if (status == 0)
7374 status = nfs4_check_cl_exchange_flags(cdata->res.flags);
ad0849a7
AA		 7375
7376 if (cdata->xprt && status == 0) {
7377 status = nfs4_detect_session_trunking(clp, &cdata->res,
7378 cdata->xprt);
7379 goto out;
7380 }
7381
8d89bd70
AA		 7382 if (status == 0)
7383 status = nfs4_sp4_select_mode(clp, &cdata->res.state_protect);
7384
7385 if (status == 0) {
7386 clp->cl_clientid = cdata->res.clientid;
7387 clp->cl_exchange_flags = cdata->res.flags;
7388 /* Client ID is not confirmed */
7389 if (!(cdata->res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7390 clear_bit(NFS4_SESSION_ESTABLISHED,
7391 &clp->cl_session->session_state);
7392 clp->cl_seqid = cdata->res.seqid;
7393 }
7394
7395 kfree(clp->cl_serverowner);
7396 clp->cl_serverowner = cdata->res.server_owner;
7397 cdata->res.server_owner = NULL;
7398
7399 /* use the most recent implementation id */
7400 kfree(clp->cl_implid);
7401 clp->cl_implid = cdata->res.impl_id;
7402 cdata->res.impl_id = NULL;
7403
7404 if (clp->cl_serverscope != NULL &&
7405 !nfs41_same_server_scope(clp->cl_serverscope,
7406 cdata->res.server_scope)) {
7407 dprintk("%s: server_scope mismatch detected\n",
7408 __func__);
7409 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
7410 kfree(clp->cl_serverscope);
7411 clp->cl_serverscope = NULL;
7412 }
7413
7414 if (clp->cl_serverscope == NULL) {
7415 clp->cl_serverscope = cdata->res.server_scope;
7416 cdata->res.server_scope = NULL;
7417 }
ad0849a7
AA		 7418 /* Save the EXCHANGE_ID verifier session trunk tests */
7419 memcpy(clp->cl_confirm.data, cdata->args.verifier->data,
7420 sizeof(clp->cl_confirm.data));
8d89bd70 7421 }
ad0849a7 7422out:
8d89bd70 7423 cdata->rpc_status = status;
ad0849a7 7424 return;
8d89bd70
AA		 7425}
7426
7427static void nfs4_exchange_id_release(void *data)
7428{
7429 struct nfs41_exchange_id_data *cdata =
7430 (struct nfs41_exchange_id_data *)data;
7431
7432 nfs_put_client(cdata->args.client);
ad0849a7
AA		 7433 if (cdata->xprt) {
7434 xprt_put(cdata->xprt);
7435 rpc_clnt_xprt_switch_put(cdata->args.client->cl_rpcclient);
7436 }
8d89bd70
AA		 7437 kfree(cdata->res.impl_id);
7438 kfree(cdata->res.server_scope);
7439 kfree(cdata->res.server_owner);
7440 kfree(cdata);
7441}
7442
7443static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
7444 .rpc_call_done = nfs4_exchange_id_done,
7445 .rpc_release = nfs4_exchange_id_release,
7446};
7447
2031cd1a
WAA		 7448/*
7449 * _nfs4_proc_exchange_id()
6bbb4ae8 7450 *
2031cd1a 7451 * Wrapper for EXCHANGE_ID operation.
99fe60d0 7452 */
2031cd1a 7453static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
ad0849a7 7454 u32 sp4_how, struct rpc_xprt *xprt)
99fe60d0
BH		 7455{
7456 nfs4_verifier verifier;
99fe60d0
BH		 7457 struct rpc_message msg = {
7458 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
99fe60d0
BH		 7459 .rpc_cred = cred,
7460 };
8d89bd70
AA		 7461 struct rpc_task_setup task_setup_data = {
7462 .rpc_client = clp->cl_rpcclient,
7463 .callback_ops = &nfs4_exchange_id_call_ops,
7464 .rpc_message = &msg,
7465 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
7466 };
7467 struct nfs41_exchange_id_data *calldata;
7468 struct rpc_task *task;
7469 int status = -EIO;
7470
7471 if (!atomic_inc_not_zero(&clp->cl_count))
7472 goto out;
7473
7474 status = -ENOMEM;
7475 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7476 if (!calldata)
7477 goto out;
99fe60d0 7478
ad0849a7
AA		 7479 if (!xprt)
7480 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 7481
7482 status = nfs4_init_uniform_client_string(clp);
7483 if (status)
8d89bd70 7484 goto out_calldata;
3a6bb738
JL		 7485
7486 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6bbb4ae8 7487 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 7488 clp->cl_owner_id);
99fe60d0 7489
8d89bd70
AA		 7490 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
7491 GFP_NOFS);
7492 status = -ENOMEM;
7493 if (unlikely(calldata->res.server_owner == NULL))
7494 goto out_calldata;
78fe0f41 7495
8d89bd70 7496 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 7497 GFP_NOFS);
8d89bd70 7498 if (unlikely(calldata->res.server_scope == NULL))
acdeb69d 7499 goto out_server_owner;
78fe0f41 7500
8d89bd70
AA		 7501 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
7502 if (unlikely(calldata->res.impl_id == NULL))
7d2ed9ac 7503 goto out_server_scope;
7d2ed9ac 7504
2031cd1a
WAA		 7505 switch (sp4_how) {
7506 case SP4_NONE:
8d89bd70 7507 calldata->args.state_protect.how = SP4_NONE;
2031cd1a
WAA		 7508 break;
7509
7510 case SP4_MACH_CRED:
8d89bd70 7511 calldata->args.state_protect = nfs4_sp4_mach_cred_request;
2031cd1a
WAA		 7512 break;
7513
7514 default:
7515 /* unsupported! */
7516 WARN_ON_ONCE(1);
7517 status = -EINVAL;
6b55970b 7518 goto out_impl_id;
2031cd1a 7519 }
ad0849a7
AA		 7520 if (xprt) {
7521 calldata->xprt = xprt;
7522 task_setup_data.rpc_xprt = xprt;
7523 task_setup_data.flags =
7524 RPC_TASK_SOFT|RPC_TASK_SOFTCONN|RPC_TASK_ASYNC;
7525 calldata->args.verifier = &clp->cl_confirm;
7526 } else {
7527 calldata->args.verifier = &verifier;
7528 }
8d89bd70
AA		 7529 calldata->args.client = clp;
7530#ifdef CONFIG_NFS_V4_1_MIGRATION
7531 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7532 EXCHGID4_FLAG_BIND_PRINC_STATEID |
7533 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
7534#else
7535 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7536 EXCHGID4_FLAG_BIND_PRINC_STATEID,
7537#endif
7538 msg.rpc_argp = &calldata->args;
7539 msg.rpc_resp = &calldata->res;
7540 task_setup_data.callback_data = calldata;
2031cd1a 7541
8d89bd70
AA		 7542 task = rpc_run_task(&task_setup_data);
7543 if (IS_ERR(task)) {
7544 status = PTR_ERR(task);
7545 goto out_impl_id;
6b55970b 7546 }
7d2ed9ac 7547
ad0849a7
AA		 7548 if (!xprt) {
7549 status = rpc_wait_for_completion_task(task);
7550 if (!status)
7551 status = calldata->rpc_status;
7552 } else /* session trunking test */
8d89bd70 7553 status = calldata->rpc_status;
ad0849a7 7554
8d89bd70 7555 rpc_put_task(task);
abe9a6d5 7556out:
177313f1 7557 if (clp->cl_implid != NULL)
6bbb4ae8 7558 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 7559 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 7560 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 7561 clp->cl_implid->date.seconds,
7562 clp->cl_implid->date.nseconds);
6bbb4ae8 7563 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0 7564 return status;
8d89bd70
AA		 7565
7566out_impl_id:
7567 kfree(calldata->res.impl_id);
7568out_server_scope:
7569 kfree(calldata->res.server_scope);
7570out_server_owner:
7571 kfree(calldata->res.server_owner);
7572out_calldata:
7573 kfree(calldata);
7574 goto out;
99fe60d0
BH		 7575}
7576
2031cd1a
WAA		 7577/*
7578 * nfs4_proc_exchange_id()
7579 *
7580 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7581 *
7582 * Since the clientid has expired, all compounds using sessions
7583 * associated with the stale clientid will be returning
7584 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7585 * be in some phase of session reset.
7586 *
7587 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7588 */
7589int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7590{
7591 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7592 int status;
7593
7594 /* try SP4_MACH_CRED if krb5i/p */
7595 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7596 authflavor == RPC_AUTH_GSS_KRB5P) {
ad0849a7 7597 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED, NULL);
2031cd1a
WAA		 7598 if (!status)
7599 return 0;
7600 }
7601
7602 /* try SP4_NONE */
ad0849a7 7603 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE, NULL);
2031cd1a
WAA		 7604}
7605
04fa2c6b
AA		 7606/**
7607 * nfs4_test_session_trunk
7608 *
7609 * This is an add_xprt_test() test function called from
7610 * rpc_clnt_setup_test_and_add_xprt.
7611 *
7612 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt
7613 * and is dereferrenced in nfs4_exchange_id_release
7614 *
7615 * Upon success, add the new transport to the rpc_clnt
7616 *
7617 * @clnt: struct rpc_clnt to get new transport
7618 * @xprt: the rpc_xprt to test
7619 * @data: call data for _nfs4_proc_exchange_id.
7620 */
7621int nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
7622 void *data)
7623{
7624 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data;
7625 u32 sp4_how;
7626
7627 dprintk("--> %s try %s\n", __func__,
7628 xprt->address_strings[RPC_DISPLAY_ADDR]);
7629
7630 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED);
7631
7632 /* Test connection for session trunking. Async exchange_id call */
7633 return _nfs4_proc_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
2031cd1a 7634}
04fa2c6b 7635EXPORT_SYMBOL_GPL(nfs4_test_session_trunk);
2031cd1a 7636
66245539
TM		 7637static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7638 struct rpc_cred *cred)
7639{
7640 struct rpc_message msg = {
7641 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7642 .rpc_argp = clp,
7643 .rpc_cred = cred,
7644 };
7645 int status;
7646
7647 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7648 trace_nfs4_destroy_clientid(clp, status);
66245539 7649 if (status)
02c67525 7650 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7651 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7652 return status;
7653}
7654
7655static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7656 struct rpc_cred *cred)
7657{
7658 unsigned int loop;
7659 int ret;
7660
7661 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7662 ret = _nfs4_proc_destroy_clientid(clp, cred);
7663 switch (ret) {
7664 case -NFS4ERR_DELAY:
7665 case -NFS4ERR_CLIENTID_BUSY:
7666 ssleep(1);
7667 break;
7668 default:
7669 return ret;
7670 }
7671 }
7672 return 0;
7673}
7674
7675int nfs4_destroy_clientid(struct nfs_client *clp)
7676{
7677 struct rpc_cred *cred;
7678 int ret = 0;
7679
7680 if (clp->cl_mvops->minor_version < 1)
7681 goto out;
7682 if (clp->cl_exchange_flags == 0)
7683 goto out;
05f4c350
CL		 7684 if (clp->cl_preserve_clid)
7685 goto out;
73d8bde5 7686 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7687 ret = nfs4_proc_destroy_clientid(clp, cred);
7688 if (cred)
7689 put_rpccred(cred);
7690 switch (ret) {
7691 case 0:
7692 case -NFS4ERR_STALE_CLIENTID:
7693 clp->cl_exchange_flags = 0;
7694 }
7695out:
7696 return ret;
7697}
7698
2050f0cc
AA		 7699struct nfs4_get_lease_time_data {
7700 struct nfs4_get_lease_time_args *args;
7701 struct nfs4_get_lease_time_res *res;
7702 struct nfs_client *clp;
7703};
7704
7705static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7706 void *calldata)
7707{
2050f0cc
AA		 7708 struct nfs4_get_lease_time_data *data =
7709 (struct nfs4_get_lease_time_data *)calldata;
7710
7711 dprintk("--> %s\n", __func__);
7712 /* just setup sequence, do not trigger session recovery
7713 since we're invoked within one */
d9afbd1b
TM		 7714 nfs41_setup_sequence(data->clp->cl_session,
7715 &data->args->la_seq_args,
7716 &data->res->lr_seq_res,
7717 task);
2050f0cc
AA		 7718 dprintk("<-- %s\n", __func__);
7719}
7720
7721/*
7722 * Called from nfs4_state_manager thread for session setup, so don't recover
7723 * from sequence operation or clientid errors.
7724 */
7725static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7726{
7727 struct nfs4_get_lease_time_data *data =
7728 (struct nfs4_get_lease_time_data *)calldata;
7729
7730 dprintk("--> %s\n", __func__);
14516c3a
TM		 7731 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7732 return;
2050f0cc
AA		 7733 switch (task->tk_status) {
7734 case -NFS4ERR_DELAY:
7735 case -NFS4ERR_GRACE:
7736 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7737 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7738 task->tk_status = 0;
a8a4ae3a
AA		 7739 /* fall through */
7740 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7741 rpc_restart_call_prepare(task);
2050f0cc
AA		 7742 return;
7743 }
2050f0cc
AA		 7744 dprintk("<-- %s\n", __func__);
7745}
7746
17280175 7747static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7748 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7749 .rpc_call_done = nfs4_get_lease_time_done,
7750};
7751
7752int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7753{
7754 struct rpc_task *task;
7755 struct nfs4_get_lease_time_args args;
7756 struct nfs4_get_lease_time_res res = {
7757 .lr_fsinfo = fsinfo,
7758 };
7759 struct nfs4_get_lease_time_data data = {
7760 .args = &args,
7761 .res = &res,
7762 .clp = clp,
7763 };
7764 struct rpc_message msg = {
7765 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7766 .rpc_argp = &args,
7767 .rpc_resp = &res,
7768 };
7769 struct rpc_task_setup task_setup = {
7770 .rpc_client = clp->cl_rpcclient,
7771 .rpc_message = &msg,
7772 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7773 .callback_data = &data,
7774 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7775 };
7776 int status;
7777
a9c92d6b 7778 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7779 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7780 dprintk("--> %s\n", __func__);
7781 task = rpc_run_task(&task_setup);
7782
7783 if (IS_ERR(task))
7784 status = PTR_ERR(task);
7785 else {
7786 status = task->tk_status;
7787 rpc_put_task(task);
7788 }
7789 dprintk("<-- %s return %d\n", __func__, status);
7790
7791 return status;
7792}
7793
fc931582
AA		 7794/*
7795 * Initialize the values to be used by the client in CREATE_SESSION
7796 * If nfs4_init_session set the fore channel request and response sizes,
7797 * use them.
7798 *
7799 * Set the back channel max_resp_sz_cached to zero to force the client to
7800 * always set csa_cachethis to FALSE because the current implementation
7801 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7802 */
6b26cc8c
CL		 7803static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
7804 struct rpc_clnt *clnt)
fc931582 7805{
18aad3d5 7806 unsigned int max_rqst_sz, max_resp_sz;
6b26cc8c 7807 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
18aad3d5
AA		 7808
7809 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7810 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7811
fc931582 7812 /* Fore channel attributes */
18aad3d5
AA		 7813 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7814 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7815 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7816 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7817
7818 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7819 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7820 __func__,
7821 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7822 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7823
7824 /* Back channel attributes */
6b26cc8c
CL		 7825 args->bc_attrs.max_rqst_sz = max_bc_payload;
7826 args->bc_attrs.max_resp_sz = max_bc_payload;
fc931582
AA		 7827 args->bc_attrs.max_resp_sz_cached = 0;
7828 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5405fc44 7829 args->bc_attrs.max_reqs = min_t(unsigned short, max_session_cb_slots, 1);
fc931582
AA		 7830
7831 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7832 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7833 __func__,
7834 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7835 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7836 args->bc_attrs.max_reqs);
7837}
7838
79969dd1
TM		 7839static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7840 struct nfs41_create_session_res *res)
8d35301d 7841{
43c2e885 7842 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7843 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7844
43c2e885
BF		 7845 if (rcvd->max_resp_sz > sent->max_resp_sz)
7846 return -EINVAL;
7847 /*
7848 * Our requested max_ops is the minimum we need; we're not
7849 * prepared to break up compounds into smaller pieces than that.
7850 * So, no point even trying to continue if the server won't
7851 * cooperate:
7852 */
7853 if (rcvd->max_ops < sent->max_ops)
7854 return -EINVAL;
7855 if (rcvd->max_reqs == 0)
7856 return -EINVAL;
b4b9a0c1
VG		 7857 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7858 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7859 return 0;
8d35301d
AA		 7860}
7861
79969dd1
TM		 7862static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7863 struct nfs41_create_session_res *res)
43c2e885
BF		 7864{
7865 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7866 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7867
b1c0df5f
TM		 7868 if (!(res->flags & SESSION4_BACK_CHAN))
7869 goto out;
43c2e885
BF		 7870 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7871 return -EINVAL;
7872 if (rcvd->max_resp_sz < sent->max_resp_sz)
7873 return -EINVAL;
7874 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7875 return -EINVAL;
5405fc44 7876 if (rcvd->max_ops > sent->max_ops)
43c2e885 7877 return -EINVAL;
5405fc44 7878 if (rcvd->max_reqs > sent->max_reqs)
43c2e885 7879 return -EINVAL;
b1c0df5f 7880out:
43c2e885
BF		 7881 return 0;
7882}
8d35301d 7883
8d35301d 7884static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7885 struct nfs41_create_session_res *res)
8d35301d 7886{
43c2e885 7887 int ret;
8d35301d 7888
79969dd1 7889 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7890 if (ret)
7891 return ret;
79969dd1
TM		 7892 return nfs4_verify_back_channel_attrs(args, res);
7893}
7894
7895static void nfs4_update_session(struct nfs4_session *session,
7896 struct nfs41_create_session_res *res)
7897{
7898 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7899 /* Mark client id and session as being confirmed */
7900 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7901 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7902 session->flags = res->flags;
7903 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7904 if (res->flags & SESSION4_BACK_CHAN)
7905 memcpy(&session->bc_attrs, &res->bc_attrs,
7906 sizeof(session->bc_attrs));
8d35301d
AA		 7907}
7908
848f5bda
TM		 7909static int _nfs4_proc_create_session(struct nfs_client *clp,
7910 struct rpc_cred *cred)
fc931582
AA		 7911{
7912 struct nfs4_session *session = clp->cl_session;
7913 struct nfs41_create_session_args args = {
7914 .client = clp,
79969dd1
TM		 7915 .clientid = clp->cl_clientid,
7916 .seqid = clp->cl_seqid,
fc931582
AA		 7917 .cb_program = NFS4_CALLBACK,
7918 };
79969dd1
TM		 7919 struct nfs41_create_session_res res;
7920
fc931582
AA		 7921 struct rpc_message msg = {
7922 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7923 .rpc_argp = &args,
7924 .rpc_resp = &res,
848f5bda 7925 .rpc_cred = cred,
fc931582
AA		 7926 };
7927 int status;
7928
6b26cc8c 7929 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
0f91421e 7930 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7931
1bd714f2 7932 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7933 trace_nfs4_create_session(clp, status);
fc931582 7934
b519d408
TM		 7935 switch (status) {
7936 case -NFS4ERR_STALE_CLIENTID:
7937 case -NFS4ERR_DELAY:
7938 case -ETIMEDOUT:
7939 case -EACCES:
7940 case -EAGAIN:
7941 goto out;
7942 };
7943
7944 clp->cl_seqid++;
43095d39 7945 if (!status) {
8d35301d 7946 /* Verify the session's negotiated channel_attrs values */
79969dd1 7947 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7948 /* Increment the clientid slot sequence id */
79969dd1
TM		 7949 if (status)
7950 goto out;
7951 nfs4_update_session(session, &res);
fc931582 7952 }
79969dd1 7953out:
fc931582
AA		 7954 return status;
7955}
7956
7957/*
7958 * Issues a CREATE_SESSION operation to the server.
7959 * It is the responsibility of the caller to verify the session is
7960 * expired before calling this routine.
7961 */
848f5bda 7962int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7963{
7964 int status;
7965 unsigned *ptr;
fc931582
AA		 7966 struct nfs4_session *session = clp->cl_session;
7967
7968 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7969
848f5bda 7970 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7971 if (status)
7972 goto out;
7973
aacd5537
AA		 7974 /* Init or reset the session slot tables */
7975 status = nfs4_setup_session_slot_tables(session);
7976 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7977 if (status)
7978 goto out;
7979
7980 ptr = (unsigned *)&session->sess_id.data[0];
7981 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7982 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7983out:
7984 dprintk("<-- %s\n", __func__);
7985 return status;
7986}
7987
0f3e66c6
AA		 7988/*
7989 * Issue the over-the-wire RPC DESTROY_SESSION.
7990 * The caller must serialize access to this routine.
7991 */
848f5bda
TM		 7992int nfs4_proc_destroy_session(struct nfs4_session *session,
7993 struct rpc_cred *cred)
0f3e66c6 7994{
848f5bda
TM		 7995 struct rpc_message msg = {
7996 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7997 .rpc_argp = session,
7998 .rpc_cred = cred,
7999 };
0f3e66c6 8000 int status = 0;
0f3e66c6
AA		 8001
8002 dprintk("--> nfs4_proc_destroy_session\n");
8003
8004 /* session is still being setup */
e11259f9
TM		 8005 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
8006 return 0;
0f3e66c6 8007
1bd714f2 8008 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 8009 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 8010
8011 if (status)
08106ac7 8012 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 8013 "Session has been destroyed regardless...\n", status);
8014
8015 dprintk("<-- nfs4_proc_destroy_session\n");
8016 return status;
8017}
8018
fc01cea9
AA		 8019/*
8020 * Renew the cl_session lease.
8021 */
d5f8d3fe
TM		 8022struct nfs4_sequence_data {
8023 struct nfs_client *clp;
8024 struct nfs4_sequence_args args;
8025 struct nfs4_sequence_res res;
8026};
8027
dc96aef9
AB		 8028static void nfs41_sequence_release(void *data)
8029{
d5f8d3fe
TM		 8030 struct nfs4_sequence_data *calldata = data;
8031 struct nfs_client *clp = calldata->clp;
dc96aef9 8032
7135840f
AB		 8033 if (atomic_read(&clp->cl_count) > 1)
8034 nfs4_schedule_state_renewal(clp);
8035 nfs_put_client(clp);
d5f8d3fe 8036 kfree(calldata);
dc96aef9
AB		 8037}
8038
aa5190d0
TM		 8039static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8040{
8041 switch(task->tk_status) {
8042 case -NFS4ERR_DELAY:
aa5190d0
TM		 8043 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8044 return -EAGAIN;
8045 default:
0400a6b0 8046 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 8047 }
8048 return 0;
8049}
8050
dc96aef9 8051static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 8052{
d5f8d3fe
TM		 8053 struct nfs4_sequence_data *calldata = data;
8054 struct nfs_client *clp = calldata->clp;
fc01cea9 8055
14516c3a
TM		 8056 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
8057 return;
fc01cea9 8058
c6d01c6f 8059 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 8060 if (task->tk_status < 0) {
8061 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 8062 if (atomic_read(&clp->cl_count) == 1)
8063 goto out;
fc01cea9 8064
aa5190d0
TM		 8065 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
8066 rpc_restart_call_prepare(task);
fc01cea9
AA		 8067 return;
8068 }
8069 }
fc01cea9 8070 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 8071out:
fc01cea9
AA		 8072 dprintk("<-- %s\n", __func__);
8073}
8074
8075static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
8076{
d5f8d3fe
TM		 8077 struct nfs4_sequence_data *calldata = data;
8078 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 8079 struct nfs4_sequence_args *args;
8080 struct nfs4_sequence_res *res;
8081
fc01cea9
AA		 8082 args = task->tk_msg.rpc_argp;
8083 res = task->tk_msg.rpc_resp;
8084
d9afbd1b 8085 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 8086}
8087
8088static const struct rpc_call_ops nfs41_sequence_ops = {
8089 .rpc_call_done = nfs41_sequence_call_done,
8090 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 8091 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 8092};
8093
8fe72bac
TM		 8094static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
8095 struct rpc_cred *cred,
8096 bool is_privileged)
fc01cea9 8097{
d5f8d3fe 8098 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 8099 struct rpc_message msg = {
8100 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
8101 .rpc_cred = cred,
8102 };
71ac6da9
TM		 8103 struct rpc_task_setup task_setup_data = {
8104 .rpc_client = clp->cl_rpcclient,
8105 .rpc_message = &msg,
8fe72bac 8106 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 8107 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 8108 };
fc01cea9 8109
7135840f 8110 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 8111 return ERR_PTR(-EIO);
dfb4f309 8112 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 8113 if (calldata == NULL) {
7135840f 8114 nfs_put_client(clp);
71ac6da9 8115 return ERR_PTR(-ENOMEM);
fc01cea9 8116 }
a9c92d6b 8117 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 8118 if (is_privileged)
8119 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 8120 msg.rpc_argp = &calldata->args;
8121 msg.rpc_resp = &calldata->res;
8122 calldata->clp = clp;
71ac6da9 8123 task_setup_data.callback_data = calldata;
fc01cea9 8124
71ac6da9
TM		 8125 return rpc_run_task(&task_setup_data);
8126}
8127
2f60ea6b 8128static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 8129{
8130 struct rpc_task *task;
8131 int ret = 0;
8132
2f60ea6b 8133 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 8134 return -EAGAIN;
8fe72bac 8135 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 8136 if (IS_ERR(task))
8137 ret = PTR_ERR(task);
8138 else
bf294b41 8139 rpc_put_task_async(task);
71ac6da9
TM		 8140 dprintk("<-- %s status=%d\n", __func__, ret);
8141 return ret;
8142}
8143
8144static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
8145{
8146 struct rpc_task *task;
8147 int ret;
8148
8fe72bac 8149 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 8150 if (IS_ERR(task)) {
8151 ret = PTR_ERR(task);
8152 goto out;
8153 }
8154 ret = rpc_wait_for_completion_task(task);
be824167 8155 if (!ret)
71ac6da9
TM		 8156 ret = task->tk_status;
8157 rpc_put_task(task);
8158out:
8159 dprintk("<-- %s status=%d\n", __func__, ret);
8160 return ret;
fc01cea9
AA		 8161}
8162
fce5c838
RL		 8163struct nfs4_reclaim_complete_data {
8164 struct nfs_client *clp;
8165 struct nfs41_reclaim_complete_args arg;
8166 struct nfs41_reclaim_complete_res res;
8167};
8168
8169static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
8170{
8171 struct nfs4_reclaim_complete_data *calldata = data;
8172
d9afbd1b
TM		 8173 nfs41_setup_sequence(calldata->clp->cl_session,
8174 &calldata->arg.seq_args,
8175 &calldata->res.seq_res,
8176 task);
fce5c838
RL		 8177}
8178
aa5190d0
TM		 8179static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8180{
8181 switch(task->tk_status) {
8182 case 0:
8183 case -NFS4ERR_COMPLETE_ALREADY:
8184 case -NFS4ERR_WRONG_CRED: /* What to do here? */
8185 break;
8186 case -NFS4ERR_DELAY:
aa5190d0 8187 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 8188 /* fall through */
8189 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 8190 return -EAGAIN;
8191 default:
0400a6b0 8192 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 8193 }
8194 return 0;
8195}
8196
fce5c838
RL		 8197static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
8198{
8199 struct nfs4_reclaim_complete_data *calldata = data;
8200 struct nfs_client *clp = calldata->clp;
8201 struct nfs4_sequence_res *res = &calldata->res.seq_res;
8202
8203 dprintk("--> %s\n", __func__);
14516c3a
TM		 8204 if (!nfs41_sequence_done(task, res))
8205 return;
fce5c838 8206
c6d01c6f 8207 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 8208 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
8209 rpc_restart_call_prepare(task);
8210 return;
8211 }
fce5c838
RL		 8212 dprintk("<-- %s\n", __func__);
8213}
8214
8215static void nfs4_free_reclaim_complete_data(void *data)
8216{
8217 struct nfs4_reclaim_complete_data *calldata = data;
8218
8219 kfree(calldata);
8220}
8221
8222static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
8223 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
8224 .rpc_call_done = nfs4_reclaim_complete_done,
8225 .rpc_release = nfs4_free_reclaim_complete_data,
8226};
8227
8228/*
8229 * Issue a global reclaim complete.
8230 */
965e9c23
TM		 8231static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
8232 struct rpc_cred *cred)
fce5c838
RL		 8233{
8234 struct nfs4_reclaim_complete_data *calldata;
8235 struct rpc_task *task;
8236 struct rpc_message msg = {
8237 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 8238 .rpc_cred = cred,
fce5c838
RL		 8239 };
8240 struct rpc_task_setup task_setup_data = {
8241 .rpc_client = clp->cl_rpcclient,
8242 .rpc_message = &msg,
8243 .callback_ops = &nfs4_reclaim_complete_call_ops,
8244 .flags = RPC_TASK_ASYNC,
8245 };
8246 int status = -ENOMEM;
8247
8248 dprintk("--> %s\n", __func__);
8535b2be 8249 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 8250 if (calldata == NULL)
8251 goto out;
8252 calldata->clp = clp;
8253 calldata->arg.one_fs = 0;
fce5c838 8254
a9c92d6b 8255 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 8256 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 8257 msg.rpc_argp = &calldata->arg;
8258 msg.rpc_resp = &calldata->res;
8259 task_setup_data.callback_data = calldata;
8260 task = rpc_run_task(&task_setup_data);
acf82b85 8261 if (IS_ERR(task)) {
fce5c838 8262 status = PTR_ERR(task);
acf82b85
DC		 8263 goto out;
8264 }
c34c32ea
AA		 8265 status = nfs4_wait_for_completion_rpc_task(task);
8266 if (status == 0)
8267 status = task->tk_status;
fce5c838 8268 rpc_put_task(task);
acf82b85 8269 return 0;
fce5c838
RL		 8270out:
8271 dprintk("<-- %s status=%d\n", __func__, status);
8272 return status;
8273}
b1f69b75
AA		 8274
8275static void
8276nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
8277{
8278 struct nfs4_layoutget *lgp = calldata;
c31663d4 8279 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 8280 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 8281
8282 dprintk("--> %s\n", __func__);
183d9e7b
JL		 8283 nfs41_setup_sequence(session, &lgp->args.seq_args,
8284 &lgp->res.seq_res, task);
8285 dprintk("<-- %s\n", __func__);
b1f69b75
AA		 8286}
8287
8288static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
8289{
8290 struct nfs4_layoutget *lgp = calldata;
183d9e7b
JL		 8291
8292 dprintk("--> %s\n", __func__);
2e80dbe7 8293 nfs41_sequence_process(task, &lgp->res.seq_res);
183d9e7b
JL		 8294 dprintk("<-- %s\n", __func__);
8295}
8296
8297static int
8298nfs4_layoutget_handle_exception(struct rpc_task *task,
8299 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
8300{
ee314c2a
TM		 8301 struct inode *inode = lgp->args.inode;
8302 struct nfs_server *server = NFS_SERVER(inode);
8303 struct pnfs_layout_hdr *lo;
e85d7ee4
TM		 8304 int nfs4err = task->tk_status;
8305 int err, status = 0;
f7db0b28 8306 LIST_HEAD(head);
b1f69b75 8307
ed7e5423 8308 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 8309
e85d7ee4 8310 switch (nfs4err) {
b1f69b75 8311 case 0:
ee314c2a 8312 goto out;
7c1e6e58
PT		 8313
8314 /*
8315 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
8316 * on the file. set tk_status to -ENODATA to tell upper layer to
8317 * retry go inband.
8318 */
8319 case -NFS4ERR_LAYOUTUNAVAILABLE:
183d9e7b 8320 status = -ENODATA;
7c1e6e58 8321 goto out;
21b874c8
TM		 8322 /*
8323 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
8324 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
8325 */
8326 case -NFS4ERR_BADLAYOUT:
183d9e7b
JL		 8327 status = -EOVERFLOW;
8328 goto out;
ed7e5423
BH		 8329 /*
8330 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
21b874c8
TM		 8331 * (or clients) writing to the same RAID stripe except when
8332 * the minlength argument is 0 (see RFC5661 section 18.43.3).
183d9e7b
JL		 8333 *
8334 * Treat it like we would RECALLCONFLICT -- we retry for a little
8335 * while, and then eventually give up.
ed7e5423 8336 */
b1f69b75 8337 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b
JL		 8338 if (lgp->args.minlength == 0) {
8339 status = -EOVERFLOW;
8340 goto out;
ed7e5423 8341 }
e85d7ee4
TM		 8342 status = -EBUSY;
8343 break;
183d9e7b 8344 case -NFS4ERR_RECALLCONFLICT:
183d9e7b 8345 status = -ERECALLCONFLICT;
e85d7ee4 8346 break;
26f47443
TM		 8347 case -NFS4ERR_DELEG_REVOKED:
8348 case -NFS4ERR_ADMIN_REVOKED:
ee314c2a
TM		 8349 case -NFS4ERR_EXPIRED:
8350 case -NFS4ERR_BAD_STATEID:
183d9e7b 8351 exception->timeout = 0;
ee314c2a 8352 spin_lock(&inode->i_lock);
f7db0b28
TM		 8353 lo = NFS_I(inode)->layout;
8354 /* If the open stateid was bad, then recover it. */
8355 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
8356 nfs4_stateid_match_other(&lgp->args.stateid,
2259f960 8357 &lgp->args.ctx->state->stateid)) {
ee314c2a 8358 spin_unlock(&inode->i_lock);
183d9e7b 8359 exception->state = lgp->args.ctx->state;
26f47443 8360 exception->stateid = &lgp->args.stateid;
2259f960
TM		 8361 break;
8362 }
f7db0b28
TM		 8363
8364 /*
8365 * Mark the bad layout state as invalid, then retry
8366 */
668f455d 8367 pnfs_mark_layout_stateid_invalid(lo, &head);
f7db0b28
TM		 8368 spin_unlock(&inode->i_lock);
8369 pnfs_free_lseg_list(&head);
8370 status = -EAGAIN;
8371 goto out;
b1f69b75 8372 }
183d9e7b 8373
e85d7ee4
TM		 8374 err = nfs4_handle_exception(server, nfs4err, exception);
8375 if (!status) {
8376 if (exception->retry)
8377 status = -EAGAIN;
8378 else
8379 status = err;
8380 }
ee314c2a 8381out:
b1f69b75 8382 dprintk("<-- %s\n", __func__);
183d9e7b 8383 return status;
b1f69b75
AA		 8384}
8385
8554116e
IK		 8386static size_t max_response_pages(struct nfs_server *server)
8387{
8388 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
8389 return nfs_page_array_len(0, max_resp_sz);
8390}
8391
8392static void nfs4_free_pages(struct page **pages, size_t size)
8393{
8394 int i;
8395
8396 if (!pages)
8397 return;
8398
8399 for (i = 0; i < size; i++) {
8400 if (!pages[i])
8401 break;
8402 __free_page(pages[i]);
8403 }
8404 kfree(pages);
8405}
8406
8407static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
8408{
8409 struct page **pages;
8410 int i;
8411
8412 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
8413 if (!pages) {
8414 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
8415 return NULL;
8416 }
8417
8418 for (i = 0; i < size; i++) {
8419 pages[i] = alloc_page(gfp_flags);
8420 if (!pages[i]) {
8421 dprintk("%s: failed to allocate page\n", __func__);
8422 nfs4_free_pages(pages, size);
8423 return NULL;
8424 }
8425 }
8426
8427 return pages;
8428}
8429
b1f69b75
AA		 8430static void nfs4_layoutget_release(void *calldata)
8431{
8432 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 8433 struct inode *inode = lgp->args.inode;
8434 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8435 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8436
8437 dprintk("--> %s\n", __func__);
8554116e 8438 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 8439 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 8440 put_nfs_open_context(lgp->args.ctx);
8441 kfree(calldata);
8442 dprintk("<-- %s\n", __func__);
8443}
8444
8445static const struct rpc_call_ops nfs4_layoutget_call_ops = {
8446 .rpc_call_prepare = nfs4_layoutget_prepare,
8447 .rpc_call_done = nfs4_layoutget_done,
8448 .rpc_release = nfs4_layoutget_release,
8449};
8450
a0b0a6e3 8451struct pnfs_layout_segment *
183d9e7b 8452nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags)
b1f69b75 8453{
a47970ff
WAA		 8454 struct inode *inode = lgp->args.inode;
8455 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8456 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8457 struct rpc_task *task;
8458 struct rpc_message msg = {
8459 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
8460 .rpc_argp = &lgp->args,
8461 .rpc_resp = &lgp->res,
6ab59344 8462 .rpc_cred = lgp->cred,
b1f69b75
AA		 8463 };
8464 struct rpc_task_setup task_setup_data = {
8465 .rpc_client = server->client,
8466 .rpc_message = &msg,
8467 .callback_ops = &nfs4_layoutget_call_ops,
8468 .callback_data = lgp,
8469 .flags = RPC_TASK_ASYNC,
8470 };
a0b0a6e3 8471 struct pnfs_layout_segment *lseg = NULL;
bc23676c
TM		 8472 struct nfs4_exception exception = {
8473 .inode = inode,
8474 .timeout = *timeout,
8475 };
b1f69b75
AA		 8476 int status = 0;
8477
8478 dprintk("--> %s\n", __func__);
8479
4bd5a980
PT		 8480 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
8481 pnfs_get_layout_hdr(NFS_I(inode)->layout);
8482
8554116e
IK		 8483 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
8484 if (!lgp->args.layout.pages) {
8485 nfs4_layoutget_release(lgp);
a0b0a6e3 8486 return ERR_PTR(-ENOMEM);
8554116e
IK		 8487 }
8488 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
8489
35124a09 8490 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 8491 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 8492 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 8493
b1f69b75
AA		 8494 task = rpc_run_task(&task_setup_data);
8495 if (IS_ERR(task))
a0b0a6e3 8496 return ERR_CAST(task);
b1f69b75 8497 status = nfs4_wait_for_completion_rpc_task(task);
183d9e7b
JL		 8498 if (status == 0) {
8499 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
8500 *timeout = exception.timeout;
8501 }
8502
1037e6ea
TM		 8503 trace_nfs4_layoutget(lgp->args.ctx,
8504 &lgp->args.range,
8505 &lgp->res.range,
48c9579a 8506 &lgp->res.stateid,
1037e6ea 8507 status);
183d9e7b 8508
085b7a45
WAA		 8509 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8510 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 8511 lseg = pnfs_layout_process(lgp);
2e80dbe7 8512 nfs4_sequence_free_slot(&lgp->res.seq_res);
b1f69b75
AA		 8513 rpc_put_task(task);
8514 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 8515 if (status)
8516 return ERR_PTR(status);
8517 return lseg;
b1f69b75
AA		 8518}
8519
cbe82603
BH		 8520static void
8521nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8522{
8523 struct nfs4_layoutreturn *lrp = calldata;
8524
8525 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 8526 nfs41_setup_sequence(lrp->clp->cl_session,
8527 &lrp->args.seq_args,
8528 &lrp->res.seq_res,
8529 task);
cbe82603
BH		 8530}
8531
8532static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8533{
8534 struct nfs4_layoutreturn *lrp = calldata;
8535 struct nfs_server *server;
8536
8537 dprintk("--> %s\n", __func__);
8538
2e80dbe7 8539 if (!nfs41_sequence_process(task, &lrp->res.seq_res))
cbe82603
BH		 8540 return;
8541
8542 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 8543 switch (task->tk_status) {
8544 default:
8545 task->tk_status = 0;
8546 case 0:
8547 break;
8548 case -NFS4ERR_DELAY:
8478eaa1 8549 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 8550 break;
2e80dbe7 8551 nfs4_sequence_free_slot(&lrp->res.seq_res);
d00c5d43 8552 rpc_restart_call_prepare(task);
cbe82603
BH		 8553 return;
8554 }
cbe82603
BH		 8555 dprintk("<-- %s\n", __func__);
8556}
8557
8558static void nfs4_layoutreturn_release(void *calldata)
8559{
8560 struct nfs4_layoutreturn *lrp = calldata;
849b286f 8561 struct pnfs_layout_hdr *lo = lrp->args.layout;
c5d73716 8562 LIST_HEAD(freeme);
cbe82603
BH		 8563
8564 dprintk("--> %s\n", __func__);
849b286f 8565 spin_lock(&lo->plh_inode->i_lock);
52ec7be2
TM		 8566 if (lrp->res.lrs_present) {
8567 pnfs_mark_matching_lsegs_invalid(lo, &freeme,
8568 &lrp->args.range,
8569 be32_to_cpu(lrp->args.stateid.seqid));
849b286f 8570 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
52ec7be2
TM		 8571 } else
8572 pnfs_mark_layout_stateid_invalid(lo, &freeme);
d67ae825 8573 pnfs_clear_layoutreturn_waitbit(lo);
849b286f 8574 spin_unlock(&lo->plh_inode->i_lock);
2e80dbe7 8575 nfs4_sequence_free_slot(&lrp->res.seq_res);
c5d73716 8576 pnfs_free_lseg_list(&freeme);
70c3bd2b 8577 pnfs_put_layout_hdr(lrp->args.layout);
5a0ec8ac 8578 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 8579 kfree(calldata);
8580 dprintk("<-- %s\n", __func__);
8581}
8582
8583static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8584 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8585 .rpc_call_done = nfs4_layoutreturn_done,
8586 .rpc_release = nfs4_layoutreturn_release,
8587};
8588
6c16605d 8589int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 8590{
8591 struct rpc_task *task;
8592 struct rpc_message msg = {
8593 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8594 .rpc_argp = &lrp->args,
8595 .rpc_resp = &lrp->res,
9556000d 8596 .rpc_cred = lrp->cred,
cbe82603
BH		 8597 };
8598 struct rpc_task_setup task_setup_data = {
1771c577 8599 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8600 .rpc_message = &msg,
8601 .callback_ops = &nfs4_layoutreturn_call_ops,
8602 .callback_data = lrp,
8603 };
6c16605d 8604 int status = 0;
cbe82603 8605
99ade3c7
AE		 8606 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
8607 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
8608 &task_setup_data.rpc_client, &msg);
8609
cbe82603 8610 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8611 if (!sync) {
8612 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8613 if (!lrp->inode) {
8614 nfs4_layoutreturn_release(lrp);
8615 return -EAGAIN;
8616 }
8617 task_setup_data.flags |= RPC_TASK_ASYNC;
8618 }
a9c92d6b 8619 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8620 task = rpc_run_task(&task_setup_data);
8621 if (IS_ERR(task))
8622 return PTR_ERR(task);
5a0ec8ac
TM		 8623 if (sync)
8624 status = task->tk_status;
48c9579a 8625 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
cbe82603
BH		 8626 dprintk("<-- %s status=%d\n", __func__, status);
8627 rpc_put_task(task);
8628 return status;
8629}
8630
b1f69b75 8631static int
cd5875fe
TM		 8632_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8633 struct pnfs_device *pdev,
8634 struct rpc_cred *cred)
b1f69b75
AA		 8635{
8636 struct nfs4_getdeviceinfo_args args = {
8637 .pdev = pdev,
4e590803
TM		 8638 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8639 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8640 };
8641 struct nfs4_getdeviceinfo_res res = {
8642 .pdev = pdev,
8643 };
8644 struct rpc_message msg = {
8645 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8646 .rpc_argp = &args,
8647 .rpc_resp = &res,
cd5875fe 8648 .rpc_cred = cred,
b1f69b75
AA		 8649 };
8650 int status;
8651
8652 dprintk("--> %s\n", __func__);
7c513058 8653 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8654 if (res.notification & ~args.notify_types)
8655 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8656 if (res.notification != args.notify_types)
8657 pdev->nocache = 1;
4e590803 8658
b1f69b75
AA		 8659 dprintk("<-- %s status=%d\n", __func__, status);
8660
8661 return status;
8662}
8663
cd5875fe
TM		 8664int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8665 struct pnfs_device *pdev,
8666 struct rpc_cred *cred)
b1f69b75
AA		 8667{
8668 struct nfs4_exception exception = { };
8669 int err;
8670
8671 do {
8672 err = nfs4_handle_exception(server,
cd5875fe 8673 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8674 &exception);
8675 } while (exception.retry);
8676 return err;
8677}
8678EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8679
863a3c6c
AA		 8680static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8681{
8682 struct nfs4_layoutcommit_data *data = calldata;
8683 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 8684 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 8685
d9afbd1b
TM		 8686 nfs41_setup_sequence(session,
8687 &data->args.seq_args,
8688 &data->res.seq_res,
8689 task);
863a3c6c
AA		 8690}
8691
8692static void
8693nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8694{
8695 struct nfs4_layoutcommit_data *data = calldata;
8696 struct nfs_server *server = NFS_SERVER(data->args.inode);
8697
6ba7db34 8698 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8699 return;
8700
8701 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8702 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8703 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8704 case -NFS4ERR_BADLAYOUT: /* no layout */
8705 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8706 task->tk_status = 0;
e59d27e0 8707 case 0:
e59d27e0
TM		 8708 break;
8709 default:
8478eaa1 8710 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8711 rpc_restart_call_prepare(task);
8712 return;
8713 }
8714 }
863a3c6c
AA		 8715}
8716
8717static void nfs4_layoutcommit_release(void *calldata)
8718{
8719 struct nfs4_layoutcommit_data *data = calldata;
8720
db29c089 8721 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8722 nfs_post_op_update_inode_force_wcc(data->args.inode,
8723 data->res.fattr);
863a3c6c 8724 put_rpccred(data->cred);
472e2594 8725 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8726 kfree(data);
8727}
8728
8729static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8730 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8731 .rpc_call_done = nfs4_layoutcommit_done,
8732 .rpc_release = nfs4_layoutcommit_release,
8733};
8734
8735int
ef311537 8736nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8737{
8738 struct rpc_message msg = {
8739 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8740 .rpc_argp = &data->args,
8741 .rpc_resp = &data->res,
8742 .rpc_cred = data->cred,
8743 };
8744 struct rpc_task_setup task_setup_data = {
8745 .task = &data->task,
8746 .rpc_client = NFS_CLIENT(data->args.inode),
8747 .rpc_message = &msg,
8748 .callback_ops = &nfs4_layoutcommit_ops,
8749 .callback_data = data,
863a3c6c
AA		 8750 };
8751 struct rpc_task *task;
8752 int status = 0;
8753
b4839ebe
KM		 8754 dprintk("NFS: initiating layoutcommit call. sync %d "
8755 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8756 data->args.lastbytewritten,
8757 data->args.inode->i_ino);
8758
472e2594
TM		 8759 if (!sync) {
8760 data->inode = nfs_igrab_and_active(data->args.inode);
8761 if (data->inode == NULL) {
8762 nfs4_layoutcommit_release(data);
8763 return -EAGAIN;
8764 }
8765 task_setup_data.flags = RPC_TASK_ASYNC;
8766 }
a9c92d6b 8767 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8768 task = rpc_run_task(&task_setup_data);
8769 if (IS_ERR(task))
8770 return PTR_ERR(task);
472e2594
TM		 8771 if (sync)
8772 status = task->tk_status;
48c9579a 8773 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
863a3c6c
AA		 8774 dprintk("%s: status %d\n", __func__, status);
8775 rpc_put_task(task);
8776 return status;
8777}
fca78d6d 8778
97431204
AA		 8779/**
8780 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8781 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8782 */
fca78d6d
BS		 8783static int
8784_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8785 struct nfs_fsinfo *info,
8786 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8787{
8788 struct nfs41_secinfo_no_name_args args = {
8789 .style = SECINFO_STYLE_CURRENT_FH,
8790 };
8791 struct nfs4_secinfo_res res = {
8792 .flavors = flavors,
8793 };
8794 struct rpc_message msg = {
8795 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8796 .rpc_argp = &args,
8797 .rpc_resp = &res,
8798 };
b1b3e136 8799 struct rpc_clnt *clnt = server->client;
7cb852df 8800 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8801 int status;
8802
8803 if (use_integrity) {
8804 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8805 cred = nfs4_get_clid_cred(server->nfs_client);
8806 msg.rpc_cred = cred;
b1b3e136
WAA		 8807 }
8808
8809 dprintk("--> %s\n", __func__);
8810 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8811 &res.seq_res, 0);
8812 dprintk("<-- %s status=%d\n", __func__, status);
8813
7cb852df
WAA		 8814 if (cred)
8815 put_rpccred(cred);
b1b3e136
WAA		 8816
8817 return status;
fca78d6d
BS		 8818}
8819
8820static int
8821nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8822 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8823{
8824 struct nfs4_exception exception = { };
8825 int err;
8826 do {
b1b3e136
WAA		 8827 /* first try using integrity protection */
8828 err = -NFS4ERR_WRONGSEC;
8829
8830 /* try to use integrity protection with machine cred */
8831 if (_nfs4_is_integrity_protected(server->nfs_client))
8832 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8833 flavors, true);
8834
8835 /*
8836 * if unable to use integrity protection, or SECINFO with
8837 * integrity protection returns NFS4ERR_WRONGSEC (which is
8838 * disallowed by spec, but exists in deployed servers) use
8839 * the current filesystem's rpc_client and the user cred.
8840 */
8841 if (err == -NFS4ERR_WRONGSEC)
8842 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8843 flavors, false);
8844
fca78d6d
BS		 8845 switch (err) {
8846 case 0:
8847 case -NFS4ERR_WRONGSEC:
78b19bae 8848 case -ENOTSUPP:
05e9cfb4 8849 goto out;
fca78d6d
BS		 8850 default:
8851 err = nfs4_handle_exception(server, err, &exception);
8852 }
8853 } while (exception.retry);
05e9cfb4 8854out:
fca78d6d
BS		 8855 return err;
8856}
8857
8858static int
8859nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8860 struct nfs_fsinfo *info)
8861{
8862 int err;
8863 struct page *page;
367156d9 8864 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8865 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8866 struct nfs4_secinfo4 *secinfo;
8867 int i;
fca78d6d
BS		 8868
8869 page = alloc_page(GFP_KERNEL);
8870 if (!page) {
8871 err = -ENOMEM;
8872 goto out;
8873 }
8874
8875 flavors = page_address(page);
8876 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8877
8878 /*
8879 * Fall back on "guess and check" method if
8880 * the server doesn't support SECINFO_NO_NAME
8881 */
78b19bae 8882 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8883 err = nfs4_find_root_sec(server, fhandle, info);
8884 goto out_freepage;
8885 }
8886 if (err)
8887 goto out_freepage;
8888
58a8cf12
WAA		 8889 for (i = 0; i < flavors->num_flavors; i++) {
8890 secinfo = &flavors->flavors[i];
8891
8892 switch (secinfo->flavor) {
8893 case RPC_AUTH_NULL:
8894 case RPC_AUTH_UNIX:
8895 case RPC_AUTH_GSS:
8896 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8897 &secinfo->flavor_info);
8898 break;
8899 default:
8900 flavor = RPC_AUTH_MAXFLAVOR;
8901 break;
8902 }
8903
4d4b69dd
WAA		 8904 if (!nfs_auth_info_match(&server->auth_info, flavor))
8905 flavor = RPC_AUTH_MAXFLAVOR;
8906
58a8cf12
WAA		 8907 if (flavor != RPC_AUTH_MAXFLAVOR) {
8908 err = nfs4_lookup_root_sec(server, fhandle,
8909 info, flavor);
8910 if (!err)
8911 break;
8912 }
8913 }
8914
8915 if (flavor == RPC_AUTH_MAXFLAVOR)
8916 err = -EPERM;
fca78d6d
BS		 8917
8918out_freepage:
8919 put_page(page);
8920 if (err == -EACCES)
8921 return -EPERM;
8922out:
8923 return err;
8924}
1cab0652 8925
ab7cb0df
TM		 8926static int _nfs41_test_stateid(struct nfs_server *server,
8927 nfs4_stateid *stateid,
8928 struct rpc_cred *cred)
7d974794
BS		 8929{
8930 int status;
8931 struct nfs41_test_stateid_args args = {
1cab0652 8932 .stateid = stateid,
7d974794
BS		 8933 };
8934 struct nfs41_test_stateid_res res;
8935 struct rpc_message msg = {
8936 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8937 .rpc_argp = &args,
8938 .rpc_resp = &res,
ab7cb0df 8939 .rpc_cred = cred,
7d974794 8940 };
3787d506
WAA		 8941 struct rpc_clnt *rpc_client = server->client;
8942
8943 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8944 &rpc_client, &msg);
1cab0652 8945
38527b15 8946 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8947 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8948 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8949 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8950 &args.seq_args, &res.seq_res);
38527b15
CL		 8951 if (status != NFS_OK) {
8952 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8953 return status;
38527b15
CL		 8954 }
8955 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8956 return -res.status;
7d974794
BS		 8957}
8958
43912bbb
TM		 8959static void nfs4_handle_delay_or_session_error(struct nfs_server *server,
8960 int err, struct nfs4_exception *exception)
8961{
8962 exception->retry = 0;
8963 switch(err) {
8964 case -NFS4ERR_DELAY:
76e8a1bd 8965 case -NFS4ERR_RETRY_UNCACHED_REP:
43912bbb
TM		 8966 nfs4_handle_exception(server, err, exception);
8967 break;
8968 case -NFS4ERR_BADSESSION:
8969 case -NFS4ERR_BADSLOT:
8970 case -NFS4ERR_BAD_HIGH_SLOT:
8971 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
8972 case -NFS4ERR_DEADSESSION:
8973 nfs4_do_handle_exception(server, err, exception);
8974 }
8975}
8976
38527b15
CL		 8977/**
8978 * nfs41_test_stateid - perform a TEST_STATEID operation
8979 *
8980 * @server: server / transport on which to perform the operation
8981 * @stateid: state ID to test
ab7cb0df 8982 * @cred: credential
38527b15
CL		 8983 *
8984 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8985 * Otherwise a negative NFS4ERR value is returned if the operation
8986 * failed or the state ID is not currently valid.
8987 */
ab7cb0df
TM		 8988static int nfs41_test_stateid(struct nfs_server *server,
8989 nfs4_stateid *stateid,
8990 struct rpc_cred *cred)
7d974794
BS		 8991{
8992 struct nfs4_exception exception = { };
8993 int err;
8994 do {
ab7cb0df 8995 err = _nfs41_test_stateid(server, stateid, cred);
43912bbb 8996 nfs4_handle_delay_or_session_error(server, err, &exception);
7d974794
BS		 8997 } while (exception.retry);
8998 return err;
8999}
9aeda35f 9000
7c1d5fae
TM		 9001struct nfs_free_stateid_data {
9002 struct nfs_server *server;
9003 struct nfs41_free_stateid_args args;
9aeda35f 9004 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 9005};
9006
9007static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
9008{
9009 struct nfs_free_stateid_data *data = calldata;
9010 nfs41_setup_sequence(nfs4_get_session(data->server),
9011 &data->args.seq_args,
9012 &data->res.seq_res,
9013 task);
9014}
9015
9016static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
9017{
9018 struct nfs_free_stateid_data *data = calldata;
9019
9020 nfs41_sequence_done(task, &data->res.seq_res);
9021
9022 switch (task->tk_status) {
9023 case -NFS4ERR_DELAY:
8478eaa1 9024 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 9025 rpc_restart_call_prepare(task);
9026 }
9027}
9028
9029static void nfs41_free_stateid_release(void *calldata)
9030{
9031 kfree(calldata);
9032}
9033
17f26b12 9034static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 9035 .rpc_call_prepare = nfs41_free_stateid_prepare,
9036 .rpc_call_done = nfs41_free_stateid_done,
9037 .rpc_release = nfs41_free_stateid_release,
9038};
9039
9040static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
f0b0bf88 9041 const nfs4_stateid *stateid,
ab7cb0df 9042 struct rpc_cred *cred,
7c1d5fae
TM		 9043 bool privileged)
9044{
9aeda35f
BS		 9045 struct rpc_message msg = {
9046 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 9047 .rpc_cred = cred,
9aeda35f 9048 };
7c1d5fae
TM		 9049 struct rpc_task_setup task_setup = {
9050 .rpc_client = server->client,
9051 .rpc_message = &msg,
9052 .callback_ops = &nfs41_free_stateid_ops,
9053 .flags = RPC_TASK_ASYNC,
9054 };
9055 struct nfs_free_stateid_data *data;
9aeda35f 9056
3787d506
WAA		 9057 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9058 &task_setup.rpc_client, &msg);
9059
38527b15 9060 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 9061 data = kmalloc(sizeof(*data), GFP_NOFS);
9062 if (!data)
9063 return ERR_PTR(-ENOMEM);
9064 data->server = server;
9065 nfs4_stateid_copy(&data->args.stateid, stateid);
9066
9067 task_setup.callback_data = data;
9068
9069 msg.rpc_argp = &data->args;
9070 msg.rpc_resp = &data->res;
76e8a1bd 9071 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
7c1d5fae
TM		 9072 if (privileged)
9073 nfs4_set_sequence_privileged(&data->args.seq_args);
9074
9075 return rpc_run_task(&task_setup);
9aeda35f
BS		 9076}
9077
38527b15
CL		 9078/**
9079 * nfs41_free_stateid - perform a FREE_STATEID operation
9080 *
9081 * @server: server / transport on which to perform the operation
9082 * @stateid: state ID to release
ab7cb0df 9083 * @cred: credential
f0b0bf88 9084 * @is_recovery: set to true if this call needs to be privileged
38527b15 9085 *
f0b0bf88 9086 * Note: this function is always asynchronous.
38527b15 9087 */
ab7cb0df 9088static int nfs41_free_stateid(struct nfs_server *server,
f0b0bf88
TM		 9089 const nfs4_stateid *stateid,
9090 struct rpc_cred *cred,
9091 bool is_recovery)
9aeda35f 9092{
7c1d5fae 9093 struct rpc_task *task;
7c1d5fae 9094
f0b0bf88 9095 task = _nfs41_free_stateid(server, stateid, cred, is_recovery);
7c1d5fae
TM		 9096 if (IS_ERR(task))
9097 return PTR_ERR(task);
7c1d5fae 9098 rpc_put_task(task);
f0b0bf88 9099 return 0;
9aeda35f 9100}
36281caa 9101
f1cdae87
JL		 9102static void
9103nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf 9104{
ab7cb0df 9105 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 9106
f0b0bf88 9107 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf 9108 nfs4_free_lock_state(server, lsp);
c8b2d0bf
TM		 9109}
9110
36281caa
TM		 9111static bool nfs41_match_stateid(const nfs4_stateid *s1,
9112 const nfs4_stateid *s2)
9113{
93b717fd
TM		 9114 if (s1->type != s2->type)
9115 return false;
9116
2d2f24ad 9117 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 9118 return false;
9119
2d2f24ad 9120 if (s1->seqid == s2->seqid)
36281caa 9121 return true;
2d2f24ad 9122 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 9123 return true;
9124
9125 return false;
9126}
9127
557134a3
AA		 9128#endif /* CONFIG_NFS_V4_1 */
9129
36281caa
TM		 9130static bool nfs4_match_stateid(const nfs4_stateid *s1,
9131 const nfs4_stateid *s2)
9132{
f597c537 9133 return nfs4_stateid_match(s1, s2);
36281caa
TM		 9134}
9135
9136
17280175 9137static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 9138 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 9139 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 9140 .recover_open = nfs4_open_reclaim,
9141 .recover_lock = nfs4_lock_reclaim,
591d71cb 9142 .establish_clid = nfs4_init_clientid,
05f4c350 9143 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 9144};
9145
591d71cb 9146#if defined(CONFIG_NFS_V4_1)
17280175 9147static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 9148 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9149 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9150 .recover_open = nfs4_open_reclaim,
9151 .recover_lock = nfs4_lock_reclaim,
4d643d1d 9152 .establish_clid = nfs41_init_clientid,
fce5c838 9153 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 9154 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 9155};
9156#endif /* CONFIG_NFS_V4_1 */
9157
17280175 9158static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 9159 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9160 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 9161 .recover_open = nfs40_open_expired,
591d71cb
AA		 9162 .recover_lock = nfs4_lock_expired,
9163 .establish_clid = nfs4_init_clientid,
9164};
9165
9166#if defined(CONFIG_NFS_V4_1)
17280175 9167static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 9168 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 9169 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 9170 .recover_open = nfs41_open_expired,
9171 .recover_lock = nfs41_lock_expired,
4d643d1d 9172 .establish_clid = nfs41_init_clientid,
1da177e4 9173};
591d71cb 9174#endif /* CONFIG_NFS_V4_1 */
1da177e4 9175
17280175 9176static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 9177 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 9178 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 9179 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 9180};
9181
9182#if defined(CONFIG_NFS_V4_1)
17280175 9183static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 9184 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 9185 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 9186 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 9187};
9188#endif
9189
ec011fe8 9190static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 9191 .get_locations = _nfs40_proc_get_locations,
44c99933 9192 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 9193};
9194
9195#if defined(CONFIG_NFS_V4_1)
9196static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 9197 .get_locations = _nfs41_proc_get_locations,
44c99933 9198 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 9199};
9200#endif /* CONFIG_NFS_V4_1 */
9201
97dc1359
TM		 9202static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
9203 .minor_version = 0,
39c6daae
TM		 9204 .init_caps = NFS_CAP_READDIRPLUS
9205 | NFS_CAP_ATOMIC_OPEN
39c6daae 9206 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 9207 .init_client = nfs40_init_client,
9208 .shutdown_client = nfs40_shutdown_client,
36281caa 9209 .match_stateid = nfs4_match_stateid,
fca78d6d 9210 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 9211 .free_lock_state = nfs4_release_lockowner,
45870d69 9212 .test_and_free_expired = nfs40_test_and_free_expired_stateid,
63f5f796 9213 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 9214 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 9215 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
9216 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
9217 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 9218 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 9219};
9220
9221#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 9222static struct nfs_seqid *
9223nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
9224{
9225 return NULL;
9226}
9227
97dc1359
TM		 9228static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
9229 .minor_version = 1,
39c6daae
TM		 9230 .init_caps = NFS_CAP_READDIRPLUS
9231 | NFS_CAP_ATOMIC_OPEN
3b66486c 9232 | NFS_CAP_POSIX_LOCK
49f9a0fa 9233 | NFS_CAP_STATEID_NFSV41
e983120e 9234 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 9235 .init_client = nfs41_init_client,
9236 .shutdown_client = nfs41_shutdown_client,
36281caa 9237 .match_stateid = nfs41_match_stateid,
fca78d6d 9238 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 9239 .free_lock_state = nfs41_free_lock_state,
45870d69 9240 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 9241 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 9242 .session_trunk = nfs4_test_session_trunk,
9915ea7e 9243 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 9244 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9245 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9246 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 9247 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 9248};
9249#endif
9250
42c2c424
SD		 9251#if defined(CONFIG_NFS_V4_2)
9252static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
9253 .minor_version = 2,
7017310a
BS		 9254 .init_caps = NFS_CAP_READDIRPLUS
9255 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 9256 | NFS_CAP_POSIX_LOCK
9257 | NFS_CAP_STATEID_NFSV41
e983120e 9258 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 9259 | NFS_CAP_ALLOCATE
2e72448b 9260 | NFS_CAP_COPY
624bd5b7 9261 | NFS_CAP_DEALLOCATE
6c5a0d89 9262 | NFS_CAP_SEEK
e5341f3a
PT		 9263 | NFS_CAP_LAYOUTSTATS
9264 | NFS_CAP_CLONE,
abf79bb3
CL		 9265 .init_client = nfs41_init_client,
9266 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 9267 .match_stateid = nfs41_match_stateid,
9268 .find_root_sec = nfs41_find_root_sec,
7017310a 9269 .free_lock_state = nfs41_free_lock_state,
9915ea7e 9270 .call_sync_ops = &nfs41_call_sync_ops,
45870d69 9271 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 9272 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 9273 .session_trunk = nfs4_test_session_trunk,
42c2c424
SD		 9274 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9275 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9276 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 9277 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 9278};
9279#endif
9280
97dc1359
TM		 9281const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
9282 [0] = &nfs_v4_0_minor_ops,
9283#if defined(CONFIG_NFS_V4_1)
9284 [1] = &nfs_v4_1_minor_ops,
9285#endif
42c2c424
SD		 9286#if defined(CONFIG_NFS_V4_2)
9287 [2] = &nfs_v4_2_minor_ops,
9288#endif
97dc1359
TM		 9289};
9290
13997823 9291static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
c4803c49
AG		 9292{
9293 ssize_t error, error2;
9294
9295 error = generic_listxattr(dentry, list, size);
9296 if (error < 0)
9297 return error;
9298 if (list) {
9299 list += error;
9300 size -= error;
9301 }
9302
9303 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
9304 if (error2 < 0)
9305 return error2;
9306 return error + error2;
9307}
9308
17f26b12 9309static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 9310 .create = nfs_create,
9311 .lookup = nfs_lookup,
9312 .atomic_open = nfs_atomic_open,
9313 .link = nfs_link,
9314 .unlink = nfs_unlink,
9315 .symlink = nfs_symlink,
9316 .mkdir = nfs_mkdir,
9317 .rmdir = nfs_rmdir,
9318 .mknod = nfs_mknod,
9319 .rename = nfs_rename,
9320 .permission = nfs_permission,
9321 .getattr = nfs_getattr,
9322 .setattr = nfs_setattr,
c4803c49 9323 .listxattr = nfs4_listxattr,
73a79706
BS		 9324};
9325
92e1d5be 9326static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 9327 .permission = nfs_permission,
9328 .getattr = nfs_getattr,
9329 .setattr = nfs_setattr,
c4803c49 9330 .listxattr = nfs4_listxattr,
6b3b5496
BF		 9331};
9332
509de811 9333const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 9334 .version = 4, /* protocol version */
9335 .dentry_ops = &nfs4_dentry_operations,
9336 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 9337 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 9338 .file_ops = &nfs4_file_operations,
1da177e4 9339 .getroot = nfs4_proc_get_root,
281cad46 9340 .submount = nfs4_submount,
ff9099f2 9341 .try_mount = nfs4_try_mount,
1da177e4
LT		 9342 .getattr = nfs4_proc_getattr,
9343 .setattr = nfs4_proc_setattr,
9344 .lookup = nfs4_proc_lookup,
9345 .access = nfs4_proc_access,
9346 .readlink = nfs4_proc_readlink,
1da177e4
LT		 9347 .create = nfs4_proc_create,
9348 .remove = nfs4_proc_remove,
9349 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 9350 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 9351 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 9352 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 9353 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 9354 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 9355 .link = nfs4_proc_link,
9356 .symlink = nfs4_proc_symlink,
9357 .mkdir = nfs4_proc_mkdir,
9358 .rmdir = nfs4_proc_remove,
9359 .readdir = nfs4_proc_readdir,
9360 .mknod = nfs4_proc_mknod,
9361 .statfs = nfs4_proc_statfs,
9362 .fsinfo = nfs4_proc_fsinfo,
9363 .pathconf = nfs4_proc_pathconf,
e9326dca 9364 .set_capabilities = nfs4_server_capabilities,
1da177e4 9365 .decode_dirent = nfs4_decode_dirent,
a4cdda59 9366 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 9367 .read_setup = nfs4_proc_read_setup,
ec06c096 9368 .read_done = nfs4_read_done,
1da177e4 9369 .write_setup = nfs4_proc_write_setup,
788e7a89 9370 .write_done = nfs4_write_done,
1da177e4 9371 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 9372 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 9373 .commit_done = nfs4_commit_done,
1da177e4 9374 .lock = nfs4_proc_lock,
e50a1c2e 9375 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 9376 .close_context = nfs4_close_context,
2b484297 9377 .open_context = nfs4_atomic_open,
011e2a7f 9378 .have_delegation = nfs4_have_delegation,
57ec14c5 9379 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 9380 .alloc_client = nfs4_alloc_client,
45a52a02 9381 .init_client = nfs4_init_client,
cdb7eced 9382 .free_client = nfs4_free_client,
1179acc6
BS		 9383 .create_server = nfs4_create_server,
9384 .clone_server = nfs_clone_server,
1da177e4
LT		 9385};
9386
64c2ce8b 9387static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
98e9cb57 9388 .name = XATTR_NAME_NFSV4_ACL,
64c2ce8b
AK		 9389 .list = nfs4_xattr_list_nfs4_acl,
9390 .get = nfs4_xattr_get_nfs4_acl,
9391 .set = nfs4_xattr_set_nfs4_acl,
9392};
9393
9394const struct xattr_handler *nfs4_xattr_handlers[] = {
9395 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 9396#ifdef CONFIG_NFS_V4_SECURITY_LABEL
9397 &nfs4_xattr_nfs4_label_handler,
9398#endif
64c2ce8b
AK		 9399 NULL
9400};
9401
1da177e4
LT		 9402/*
9403 * Local variables:
9404 * c-basic-offset: 8
9405 * End:
9406 */
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