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NFSv4: Convert CLOSE to use nfs4_async_handle_exception()
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
64c2ce8b 54#include <linux/xattr.h>
c7a360b0 55#include <linux/utsname.h>
d310310c 56#include <linux/freezer.h>
1da177e4 57
4ce79717 58#include "nfs4_fs.h"
1da177e4 59#include "delegation.h"
101070ca 60#include "internal.h"
006ea73e 61#include "iostat.h"
fc931582 62#include "callback.h"
b1f69b75 63#include "pnfs.h"
f092075d 64#include "netns.h"
40c64c26 65#include "nfs4idmap.h"
73e39aaa 66#include "nfs4session.h"
de242c0b 67#include "fscache.h"
1da177e4 68
c6d01c6f
TM		 69#include "nfs4trace.h"
70
1da177e4
LT		 71#define NFSDBG_FACILITY NFSDBG_PROC
72
2066fe89 73#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 74#define NFS4_POLL_RETRY_MAX (15*HZ)
75
a1d1c4f1
TM		 76/* file attributes which can be mapped to nfs attributes */
77#define NFS4_VALID_ATTRS (ATTR_MODE \
78 | ATTR_UID \
79 | ATTR_GID \
80 | ATTR_SIZE \
81 | ATTR_ATIME \
82 | ATTR_MTIME \
83 | ATTR_CTIME \
84 | ATTR_ATIME_SET \
85 | ATTR_MTIME_SET)
86
cdd4e68b 87struct nfs4_opendata;
864472e9 88static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 89static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 90static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
81934ddb 91static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 92static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
93static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 94static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
95 struct nfs_fattr *fattr, struct iattr *sattr,
29b59f94 96 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
1775fd3e 97 struct nfs4_label *olabel);
f062eb6c 98#ifdef CONFIG_NFS_V4_1
3be0f80b
TM		 99static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
100 struct rpc_cred *cred,
101 struct nfs4_slot *slot,
102 bool is_privileged);
ab7cb0df
TM		 103static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
104 struct rpc_cred *);
f0b0bf88
TM		 105static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *,
106 struct rpc_cred *, bool);
f062eb6c 107#endif
aa9c2669
DQ		 108
109#ifdef CONFIG_NFS_V4_SECURITY_LABEL
110static inline struct nfs4_label *
111nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
112 struct iattr *sattr, struct nfs4_label *label)
113{
114 int err;
115
116 if (label == NULL)
117 return NULL;
118
119 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
120 return NULL;
121
aa9c2669
DQ		 122 err = security_dentry_init_security(dentry, sattr->ia_mode,
123 &dentry->d_name, (void **)&label->label, &label->len);
124 if (err == 0)
125 return label;
126
127 return NULL;
128}
129static inline void
130nfs4_label_release_security(struct nfs4_label *label)
131{
132 if (label)
133 security_release_secctx(label->label, label->len);
134}
135static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
136{
137 if (label)
138 return server->attr_bitmask;
139
140 return server->attr_bitmask_nl;
141}
142#else
143static inline struct nfs4_label *
144nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
145 struct iattr *sattr, struct nfs4_label *l)
146{ return NULL; }
147static inline void
148nfs4_label_release_security(struct nfs4_label *label)
149{ return; }
150static inline u32 *
151nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
152{ return server->attr_bitmask; }
153#endif
154
1da177e4 155/* Prevent leaks of NFSv4 errors into userland */
46f72f57 156static int nfs4_map_errors(int err)
1da177e4 157{
52567b03
TM		 158 if (err >= -1000)
159 return err;
160 switch (err) {
161 case -NFS4ERR_RESOURCE:
30005121
WAA		 162 case -NFS4ERR_LAYOUTTRYLATER:
163 case -NFS4ERR_RECALLCONFLICT:
52567b03 164 return -EREMOTEIO;
7ebb9315 165 case -NFS4ERR_WRONGSEC:
8897538e 166 case -NFS4ERR_WRONG_CRED:
7ebb9315 167 return -EPERM;
3ddeb7c5
TM		 168 case -NFS4ERR_BADOWNER:
169 case -NFS4ERR_BADNAME:
170 return -EINVAL;
fb13bfa7
TM		 171 case -NFS4ERR_SHARE_DENIED:
172 return -EACCES;
f25efd85
SD		 173 case -NFS4ERR_MINOR_VERS_MISMATCH:
174 return -EPROTONOSUPPORT;
6e3cf241
TM		 175 case -NFS4ERR_FILE_OPEN:
176 return -EBUSY;
52567b03 177 default:
1da177e4 178 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 179 __func__, -err);
52567b03 180 break;
1da177e4 181 }
52567b03 182 return -EIO;
1da177e4
LT		 183}
184
185/*
186 * This is our standard bitmap for GETATTR requests.
187 */
1549210f 188const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 189 FATTR4_WORD0_TYPE
190 | FATTR4_WORD0_CHANGE
191 | FATTR4_WORD0_SIZE
192 | FATTR4_WORD0_FSID
193 | FATTR4_WORD0_FILEID,
194 FATTR4_WORD1_MODE
195 | FATTR4_WORD1_NUMLINKS
196 | FATTR4_WORD1_OWNER
197 | FATTR4_WORD1_OWNER_GROUP
198 | FATTR4_WORD1_RAWDEV
199 | FATTR4_WORD1_SPACE_USED
200 | FATTR4_WORD1_TIME_ACCESS
201 | FATTR4_WORD1_TIME_METADATA
ea96d1ec
AS		 202 | FATTR4_WORD1_TIME_MODIFY
203 | FATTR4_WORD1_MOUNTED_ON_FILEID,
aa9c2669
DQ		 204#ifdef CONFIG_NFS_V4_SECURITY_LABEL
205 FATTR4_WORD2_SECURITY_LABEL
206#endif
1da177e4
LT		 207};
208
1549210f
TM		 209static const u32 nfs4_pnfs_open_bitmap[3] = {
210 FATTR4_WORD0_TYPE
211 | FATTR4_WORD0_CHANGE
212 | FATTR4_WORD0_SIZE
213 | FATTR4_WORD0_FSID
214 | FATTR4_WORD0_FILEID,
215 FATTR4_WORD1_MODE
216 | FATTR4_WORD1_NUMLINKS
217 | FATTR4_WORD1_OWNER
218 | FATTR4_WORD1_OWNER_GROUP
219 | FATTR4_WORD1_RAWDEV
220 | FATTR4_WORD1_SPACE_USED
221 | FATTR4_WORD1_TIME_ACCESS
222 | FATTR4_WORD1_TIME_METADATA
223 | FATTR4_WORD1_TIME_MODIFY,
224 FATTR4_WORD2_MDSTHRESHOLD
95864c91
TM		 225#ifdef CONFIG_NFS_V4_SECURITY_LABEL
226 | FATTR4_WORD2_SECURITY_LABEL
227#endif
1549210f
TM		 228};
229
e23008ec
AA		 230static const u32 nfs4_open_noattr_bitmap[3] = {
231 FATTR4_WORD0_TYPE
e23008ec
AA		 232 | FATTR4_WORD0_FILEID,
233};
234
a09df2ca 235const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 236 FATTR4_WORD0_FILES_AVAIL
237 | FATTR4_WORD0_FILES_FREE
238 | FATTR4_WORD0_FILES_TOTAL,
239 FATTR4_WORD1_SPACE_AVAIL
240 | FATTR4_WORD1_SPACE_FREE
241 | FATTR4_WORD1_SPACE_TOTAL
242};
243
a09df2ca 244const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 245 FATTR4_WORD0_MAXLINK
246 | FATTR4_WORD0_MAXNAME,
247 0
248};
249
dae100c2 250const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 251 | FATTR4_WORD0_MAXREAD
252 | FATTR4_WORD0_MAXWRITE
253 | FATTR4_WORD0_LEASE_TIME,
55b6e774 254 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 255 | FATTR4_WORD1_FS_LAYOUT_TYPES,
256 FATTR4_WORD2_LAYOUT_BLKSIZE
2a92ee92 257 | FATTR4_WORD2_CLONE_BLKSIZE
1da177e4
LT		 258};
259
a09df2ca 260const u32 nfs4_fs_locations_bitmap[3] = {
c05cefcc 261 FATTR4_WORD0_CHANGE
830b8e33
MN		 262 | FATTR4_WORD0_SIZE
263 | FATTR4_WORD0_FSID
264 | FATTR4_WORD0_FILEID
265 | FATTR4_WORD0_FS_LOCATIONS,
c05cefcc 266 FATTR4_WORD1_OWNER
830b8e33
MN		 267 | FATTR4_WORD1_OWNER_GROUP
268 | FATTR4_WORD1_RAWDEV
269 | FATTR4_WORD1_SPACE_USED
270 | FATTR4_WORD1_TIME_ACCESS
271 | FATTR4_WORD1_TIME_METADATA
272 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 273 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 274};
275
bc4785cd 276static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 277 struct nfs4_readdir_arg *readdir)
278{
18fe6a23 279 unsigned int attrs = FATTR4_WORD0_FILEID | FATTR4_WORD0_TYPE;
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 */
18fe6a23
AS		 310 *p++ = htonl(attrs); /* bitmap */
311 *p++ = htonl(12); /* attribute buffer length */
312 *p++ = htonl(NF4DIR);
2b0143b5 313 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
1da177e4
LT		 314 }
315
316 *p++ = xdr_one; /* next */
317 *p++ = xdr_zero; /* cookie, first word */
318 *p++ = xdr_two; /* cookie, second word */
319 *p++ = xdr_two; /* entry len */
320 memcpy(p, "..\0\0", 4); /* entry */
321 p++;
322 *p++ = xdr_one; /* bitmap length */
18fe6a23
AS		 323 *p++ = htonl(attrs); /* bitmap */
324 *p++ = htonl(12); /* attribute buffer length */
325 *p++ = htonl(NF4DIR);
2b0143b5 326 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
1da177e4
LT		 327
328 readdir->pgbase = (char *)p - (char *)start;
329 readdir->count -= readdir->pgbase;
2b86ce2d 330 kunmap_atomic(start);
1da177e4
LT		 331}
332
26d36301
TM		 333static void nfs4_test_and_free_stateid(struct nfs_server *server,
334 nfs4_stateid *stateid,
335 struct rpc_cred *cred)
336{
337 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops;
338
339 ops->test_and_free_expired(server, stateid, cred);
340}
341
342static void __nfs4_free_revoked_stateid(struct nfs_server *server,
343 nfs4_stateid *stateid,
344 struct rpc_cred *cred)
345{
346 stateid->type = NFS4_REVOKED_STATEID_TYPE;
347 nfs4_test_and_free_stateid(server, stateid, cred);
348}
349
350static void nfs4_free_revoked_stateid(struct nfs_server *server,
351 const nfs4_stateid *stateid,
352 struct rpc_cred *cred)
353{
354 nfs4_stateid tmp;
355
356 nfs4_stateid_copy(&tmp, stateid);
357 __nfs4_free_revoked_stateid(server, &tmp, cred);
358}
359
8478eaa1
N		 360static long nfs4_update_delay(long *timeout)
361{
362 long ret;
363 if (!timeout)
364 return NFS4_POLL_RETRY_MAX;
365 if (*timeout <= 0)
366 *timeout = NFS4_POLL_RETRY_MIN;
367 if (*timeout > NFS4_POLL_RETRY_MAX)
368 *timeout = NFS4_POLL_RETRY_MAX;
369 ret = *timeout;
370 *timeout <<= 1;
371 return ret;
372}
373
65de872e
TM		 374static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
375{
376 int res = 0;
377
378 might_sleep();
379
8478eaa1
N		 380 freezable_schedule_timeout_killable_unsafe(
381 nfs4_update_delay(timeout));
65de872e
TM		 382 if (fatal_signal_pending(current))
383 res = -ERESTARTSYS;
65de872e
TM		 384 return res;
385}
386
387/* This is the error handling routine for processes that are allowed
388 * to sleep.
389 */
b3c2aa07
TM		 390static int nfs4_do_handle_exception(struct nfs_server *server,
391 int errorcode, struct nfs4_exception *exception)
65de872e
TM		 392{
393 struct nfs_client *clp = server->nfs_client;
9e33bed5 394 struct nfs4_state *state = exception->state;
8487c479 395 const nfs4_stateid *stateid = exception->stateid;
3114ea7a 396 struct inode *inode = exception->inode;
65de872e
TM		 397 int ret = errorcode;
398
b3c2aa07
TM		 399 exception->delay = 0;
400 exception->recovering = 0;
65de872e 401 exception->retry = 0;
272289a3
TM		 402
403 if (stateid == NULL && state != NULL)
404 stateid = &state->stateid;
405
65de872e
TM		 406 switch(errorcode) {
407 case 0:
408 return 0;
5ba12443
TM		 409 case -NFS4ERR_DELEG_REVOKED:
410 case -NFS4ERR_ADMIN_REVOKED:
272289a3 411 case -NFS4ERR_EXPIRED:
5ba12443 412 case -NFS4ERR_BAD_STATEID:
272289a3
TM		 413 if (inode != NULL && stateid != NULL) {
414 nfs_inode_find_state_and_recover(inode,
415 stateid);
416 goto wait_on_recovery;
417 }
418 case -NFS4ERR_OPENMODE:
8487c479
TM		 419 if (inode) {
420 int err;
421
422 err = nfs_async_inode_return_delegation(inode,
423 stateid);
424 if (err == 0)
425 goto wait_on_recovery;
426 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) {
427 exception->retry = 1;
428 break;
429 }
430 }
3114ea7a
TM		 431 if (state == NULL)
432 break;
5d422301
TM		 433 ret = nfs4_schedule_stateid_recovery(server, state);
434 if (ret < 0)
435 break;
3114ea7a 436 goto wait_on_recovery;
65de872e 437 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 438 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 439 nfs4_schedule_lease_recovery(clp);
440 goto wait_on_recovery;
519ae255
CL		 441 case -NFS4ERR_MOVED:
442 ret = nfs4_schedule_migration_recovery(server);
443 if (ret < 0)
444 break;
445 goto wait_on_recovery;
8ef2f8d4
CL		 446 case -NFS4ERR_LEASE_MOVED:
447 nfs4_schedule_lease_moved_recovery(clp);
448 goto wait_on_recovery;
03391693 449#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 450 case -NFS4ERR_BADSESSION:
451 case -NFS4ERR_BADSLOT:
452 case -NFS4ERR_BAD_HIGH_SLOT:
453 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
454 case -NFS4ERR_DEADSESSION:
455 case -NFS4ERR_SEQ_FALSE_RETRY:
456 case -NFS4ERR_SEQ_MISORDERED:
457 dprintk("%s ERROR: %d Reset session\n", __func__,
458 errorcode);
9f594791 459 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 460 goto wait_on_recovery;
03391693 461#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 462 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 463 if (exception->timeout > HZ) {
464 /* We have retried a decent amount, time to
465 * fail
466 */
467 ret = -EBUSY;
468 break;
469 }
65de872e 470 case -NFS4ERR_DELAY:
2598ed34
TM		 471 nfs_inc_server_stats(server, NFSIOS_DELAY);
472 case -NFS4ERR_GRACE:
e85d7ee4 473 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b 474 case -NFS4ERR_RECALLCONFLICT:
b3c2aa07
TM		 475 exception->delay = 1;
476 return 0;
477
a8a4ae3a 478 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 479 case -NFS4ERR_OLD_STATEID:
480 exception->retry = 1;
b064eca2
TM		 481 break;
482 case -NFS4ERR_BADOWNER:
483 /* The following works around a Linux server bug! */
484 case -NFS4ERR_BADNAME:
485 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
486 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
487 exception->retry = 1;
488 printk(KERN_WARNING "NFS: v4 server %s "
489 "does not accept raw "
490 "uid/gids. "
491 "Reenabling the idmapper.\n",
492 server->nfs_client->cl_hostname);
493 }
65de872e
TM		 494 }
495 /* We failed to handle the error */
496 return nfs4_map_errors(ret);
0400a6b0 497wait_on_recovery:
b3c2aa07
TM		 498 exception->recovering = 1;
499 return 0;
500}
501
502/* This is the error handling routine for processes that are allowed
503 * to sleep.
504 */
505int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
506{
507 struct nfs_client *clp = server->nfs_client;
508 int ret;
509
510 ret = nfs4_do_handle_exception(server, errorcode, exception);
511 if (exception->delay) {
512 ret = nfs4_delay(server->client, &exception->timeout);
513 goto out_retry;
514 }
515 if (exception->recovering) {
516 ret = nfs4_wait_clnt_recover(clp);
517 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
518 return -EIO;
519 goto out_retry;
520 }
521 return ret;
522out_retry:
a2c0b9e2
TM		 523 if (ret == 0)
524 exception->retry = 1;
525 return ret;
65de872e
TM		 526}
527
037fc980
TM		 528static int
529nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
530 int errorcode, struct nfs4_exception *exception)
531{
532 struct nfs_client *clp = server->nfs_client;
533 int ret;
534
535 ret = nfs4_do_handle_exception(server, errorcode, exception);
536 if (exception->delay) {
537 rpc_delay(task, nfs4_update_delay(&exception->timeout));
538 goto out_retry;
539 }
540 if (exception->recovering) {
541 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
542 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
543 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
544 goto out_retry;
545 }
519ae255 546 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
037fc980
TM		 547 ret = -EIO;
548 return ret;
549out_retry:
a2c0b9e2
TM		 550 if (ret == 0)
551 exception->retry = 1;
552 return ret;
65de872e
TM		 553}
554
037fc980
TM		 555static int
556nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
557 struct nfs4_state *state, long *timeout)
558{
559 struct nfs4_exception exception = {
560 .state = state,
561 };
562
563 if (task->tk_status >= 0)
564 return 0;
565 if (timeout)
566 exception.timeout = *timeout;
567 task->tk_status = nfs4_async_handle_exception(task, server,
568 task->tk_status,
569 &exception);
570 if (exception.delay && timeout)
571 *timeout = exception.timeout;
572 if (exception.retry)
573 return -EAGAIN;
574 return 0;
575}
576
a5250def
WAA		 577/*
578 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
579 * or 'false' otherwise.
580 */
581static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
582{
583 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
eeea5361 584 return (flavor == RPC_AUTH_GSS_KRB5I) || (flavor == RPC_AUTH_GSS_KRB5P);
a5250def 585}
65de872e 586
452e9352 587static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 588{
1da177e4
LT		 589 spin_lock(&clp->cl_lock);
590 if (time_before(clp->cl_last_renewal,timestamp))
591 clp->cl_last_renewal = timestamp;
592 spin_unlock(&clp->cl_lock);
593}
594
452e9352
TM		 595static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
596{
be824167
TM		 597 struct nfs_client *clp = server->nfs_client;
598
599 if (!nfs4_has_session(clp))
600 do_renew_lease(clp, timestamp);
452e9352
TM		 601}
602
2a3eb2b9
CL		 603struct nfs4_call_sync_data {
604 const struct nfs_server *seq_server;
605 struct nfs4_sequence_args *seq_args;
606 struct nfs4_sequence_res *seq_res;
607};
608
be3a5d23
TM		 609void nfs4_init_sequence(struct nfs4_sequence_args *args,
610 struct nfs4_sequence_res *res, int cache_reply)
a9c92d6b
CL		 611{
612 args->sa_slot = NULL;
613 args->sa_cache_this = cache_reply;
614 args->sa_privileged = 0;
615
616 res->sr_slot = NULL;
617}
618
619static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
620{
621 args->sa_privileged = 1;
622}
623
2e80dbe7 624static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res)
3bd2384a
CL		 625{
626 struct nfs4_slot *slot = res->sr_slot;
627 struct nfs4_slot_table *tbl;
628
3bd2384a
CL		 629 tbl = slot->table;
630 spin_lock(&tbl->slot_tbl_lock);
631 if (!nfs41_wake_and_assign_slot(tbl, slot))
632 nfs4_free_slot(tbl, slot);
633 spin_unlock(&tbl->slot_tbl_lock);
634
635 res->sr_slot = NULL;
2e80dbe7
TM		 636}
637
638static int nfs40_sequence_done(struct rpc_task *task,
639 struct nfs4_sequence_res *res)
640{
641 if (res->sr_slot != NULL)
642 nfs40_sequence_free_slot(res);
3bd2384a
CL		 643 return 1;
644}
645
cccef3b9
AA		 646#if defined(CONFIG_NFS_V4_1)
647
3be0f80b 648static void nfs41_release_slot(struct nfs4_slot *slot)
13615871 649{
e3725ec0 650 struct nfs4_session *session;
13615871 651 struct nfs4_slot_table *tbl;
c10e4498 652 bool send_new_highest_used_slotid = false;
13615871 653
3be0f80b
TM		 654 if (!slot)
655 return;
a13ce7c6 656 tbl = slot->table;
e3725ec0 657 session = tbl->session;
ea028ac9 658
07e8dcbd
TM		 659 /* Bump the slot sequence number */
660 if (slot->seq_done)
661 slot->seq_nr++;
662 slot->seq_done = 0;
663
35dc1d74 664 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 665 /* Be nice to the server: try to ensure that the last transmitted
666 * value for highest_user_slotid <= target_highest_slotid
667 */
668 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
669 send_new_highest_used_slotid = true;
670
a13ce7c6 671 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 672 send_new_highest_used_slotid = false;
673 goto out_unlock;
674 }
a13ce7c6 675 nfs4_free_slot(tbl, slot);
c10e4498
TM		 676
677 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
678 send_new_highest_used_slotid = false;
b75ad4cd 679out_unlock:
35dc1d74 680 spin_unlock(&tbl->slot_tbl_lock);
c10e4498 681 if (send_new_highest_used_slotid)
3f10a6af 682 nfs41_notify_server(session->clp);
045d2a6d
TM		 683 if (waitqueue_active(&tbl->slot_waitq))
684 wake_up_all(&tbl->slot_waitq);
13615871
AA		 685}
686
3be0f80b
TM		 687static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
688{
689 nfs41_release_slot(res->sr_slot);
690 res->sr_slot = NULL;
691}
692
2e80dbe7
TM		 693static int nfs41_sequence_process(struct rpc_task *task,
694 struct nfs4_sequence_res *res)
b0df806c 695{
e3725ec0 696 struct nfs4_session *session;
a13ce7c6 697 struct nfs4_slot *slot = res->sr_slot;
14516c3a 698 struct nfs_client *clp;
ac20d163 699 bool interrupted = false;
85563073 700 int ret = 1;
b0df806c 701
a13ce7c6
TM		 702 if (slot == NULL)
703 goto out_noaction;
468f8613
BS		 704 /* don't increment the sequence number if the task wasn't sent */
705 if (!RPC_WAS_SENT(task))
b0df806c
AA		 706 goto out;
707
e3725ec0 708 session = slot->table->session;
933602e3 709
ac20d163 710 if (slot->interrupted) {
88bd4f86
OK		 711 if (res->sr_status != -NFS4ERR_DELAY)
712 slot->interrupted = 0;
ac20d163
TM		 713 interrupted = true;
714 }
715
2f92ae34 716 trace_nfs4_sequence_done(session, res);
691daf3b 717 /* Check the SEQUENCE operation status */
14516c3a
TM		 718 switch (res->sr_status) {
719 case 0:
b0df806c 720 /* Update the slot's sequence and clientid lease timer */
07e8dcbd 721 slot->seq_done = 1;
e3725ec0 722 clp = session->clp;
8e63b6a8 723 do_renew_lease(clp, res->sr_timestamp);
0629e370 724 /* Check sequence flags */
0a014a44
TM		 725 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags,
726 !!slot->privileged);
464ee9f9 727 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 728 break;
ac20d163
TM		 729 case 1:
730 /*
731 * sr_status remains 1 if an RPC level error occurred.
732 * The server may or may not have processed the sequence
733 * operation..
734 * Mark the slot as having hosted an interrupted RPC call.
735 */
736 slot->interrupted = 1;
737 goto out;
14516c3a
TM		 738 case -NFS4ERR_DELAY:
739 /* The server detected a resend of the RPC call and
740 * returned NFS4ERR_DELAY as per Section 2.10.6.2
741 * of RFC5661.
742 */
df2fabff 743 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 744 __func__,
df2fabff 745 slot->slot_nr,
933602e3 746 slot->seq_nr);
14516c3a 747 goto out_retry;
85563073
TM		 748 case -NFS4ERR_BADSLOT:
749 /*
750 * The slot id we used was probably retired. Try again
751 * using a different slot id.
752 */
3be0f80b
TM		 753 if (slot->seq_nr < slot->table->target_highest_slotid)
754 goto session_recover;
e8794440
TM		 755 goto retry_nowait;
756 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 757 /*
758 * Was the last operation on this sequence interrupted?
759 * If so, retry after bumping the sequence number.
760 */
3be0f80b
TM		 761 if (interrupted)
762 goto retry_new_seq;
e8794440
TM		 763 /*
764 * Could this slot have been previously retired?
765 * If so, then the server may be expecting seq_nr = 1!
766 */
8e63b6a8
TM		 767 if (slot->seq_nr != 1) {
768 slot->seq_nr = 1;
769 goto retry_nowait;
770 }
3be0f80b 771 goto session_recover;
e8794440 772 case -NFS4ERR_SEQ_FALSE_RETRY:
3be0f80b
TM		 773 if (interrupted)
774 goto retry_new_seq;
775 goto session_recover;
14516c3a
TM		 776 default:
777 /* Just update the slot sequence no. */
07e8dcbd 778 slot->seq_done = 1;
b0df806c
AA		 779 }
780out:
781 /* The session may be reset by one of the error handlers. */
782 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
a13ce7c6 783out_noaction:
85563073 784 return ret;
3be0f80b
TM		 785session_recover:
786 nfs4_schedule_session_recovery(session, res->sr_status);
787 goto retry_nowait;
788retry_new_seq:
789 ++slot->seq_nr;
e8794440
TM		 790retry_nowait:
791 if (rpc_restart_call_prepare(task)) {
2e80dbe7 792 nfs41_sequence_free_slot(res);
e8794440
TM		 793 task->tk_status = 0;
794 ret = 0;
795 }
796 goto out;
14516c3a 797out_retry:
d05dd4e9 798 if (!rpc_restart_call(task))
14516c3a
TM		 799 goto out;
800 rpc_delay(task, NFS4_POLL_RETRY_MAX);
801 return 0;
b0df806c 802}
2e80dbe7
TM		 803
804int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
805{
806 if (!nfs41_sequence_process(task, res))
807 return 0;
808 if (res->sr_slot != NULL)
809 nfs41_sequence_free_slot(res);
810 return 1;
811
812}
f9c96fcc 813EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 814
2e80dbe7
TM		 815static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
816{
817 if (res->sr_slot == NULL)
818 return 1;
819 if (res->sr_slot->table->session != NULL)
820 return nfs41_sequence_process(task, res);
821 return nfs40_sequence_done(task, res);
822}
823
824static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
825{
826 if (res->sr_slot != NULL) {
827 if (res->sr_slot->table->session != NULL)
828 nfs41_sequence_free_slot(res);
829 else
830 nfs40_sequence_free_slot(res);
831 }
832}
833
2c4b131d 834int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 835{
e3725ec0 836 if (res->sr_slot == NULL)
14516c3a 837 return 1;
3bd2384a
CL		 838 if (!res->sr_slot->table->session)
839 return nfs40_sequence_done(task, res);
14516c3a 840 return nfs41_sequence_done(task, res);
df896455 841}
2c4b131d 842EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 843
ce5039c1
AA		 844static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
845{
2a3eb2b9 846 struct nfs4_call_sync_data *data = calldata;
ce5039c1 847
035168ab
TM		 848 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
849
7981c8a6
AS		 850 nfs4_setup_sequence(data->seq_server->nfs_client,
851 data->seq_args, data->seq_res, task);
ce5039c1
AA		 852}
853
69ab40c4
AA		 854static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
855{
2a3eb2b9 856 struct nfs4_call_sync_data *data = calldata;
69ab40c4 857
14516c3a 858 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 859}
860
17280175 861static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 862 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 863 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 864};
865
3be0f80b
TM		 866static void
867nfs4_sequence_process_interrupted(struct nfs_client *client,
868 struct nfs4_slot *slot, struct rpc_cred *cred)
869{
870 struct rpc_task *task;
871
872 task = _nfs41_proc_sequence(client, cred, slot, true);
873 if (!IS_ERR(task))
874 rpc_put_task_async(task);
875}
876
3bd2384a
CL		 877#else /* !CONFIG_NFS_V4_1 */
878
2e80dbe7
TM		 879static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
880{
881 return nfs40_sequence_done(task, res);
882}
883
884static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
885{
886 if (res->sr_slot != NULL)
887 nfs40_sequence_free_slot(res);
888}
889
2c4b131d
PT		 890int nfs4_sequence_done(struct rpc_task *task,
891 struct nfs4_sequence_res *res)
9915ea7e 892{
3bd2384a 893 return nfs40_sequence_done(task, res);
9915ea7e 894}
2c4b131d 895EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a 896
3be0f80b
TM		 897static void
898nfs4_sequence_process_interrupted(struct nfs_client *client,
899 struct nfs4_slot *slot, struct rpc_cred *cred)
900{
901 WARN_ON_ONCE(1);
902 slot->interrupted = 0;
903}
904
3bd2384a 905#endif /* !CONFIG_NFS_V4_1 */
9915ea7e 906
3be0f80b
TM		 907static
908void nfs4_sequence_attach_slot(struct nfs4_sequence_args *args,
909 struct nfs4_sequence_res *res,
910 struct nfs4_slot *slot)
911{
912 if (!slot)
913 return;
914 slot->privileged = args->sa_privileged ? 1 : 0;
915 args->sa_slot = slot;
916
917 res->sr_slot = slot;
918 res->sr_timestamp = jiffies;
919 res->sr_status_flags = 0;
920 res->sr_status = 1;
921
922}
923
924int nfs4_setup_sequence(struct nfs_client *client,
7981c8a6
AS		 925 struct nfs4_sequence_args *args,
926 struct nfs4_sequence_res *res,
927 struct rpc_task *task)
928{
7981c8a6 929 struct nfs4_session *session = nfs4_get_session(client);
76ee0354 930 struct nfs4_slot_table *tbl = client->cl_slot_tbl;
3d35808b 931 struct nfs4_slot *slot;
7981c8a6 932
9dd9107f
AS		 933 /* slot already allocated? */
934 if (res->sr_slot != NULL)
935 goto out_start;
936
76ee0354
AS		 937 if (session) {
938 tbl = &session->fc_slot_table;
939 task->tk_timeout = 0;
940 }
941
3be0f80b
TM		 942 for (;;) {
943 spin_lock(&tbl->slot_tbl_lock);
944 /* The state manager will wait until the slot table is empty */
945 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
946 goto out_sleep;
947
948 slot = nfs4_alloc_slot(tbl);
949 if (IS_ERR(slot)) {
950 /* Try again in 1/4 second */
951 if (slot == ERR_PTR(-ENOMEM))
952 task->tk_timeout = HZ >> 2;
953 goto out_sleep;
954 }
955 spin_unlock(&tbl->slot_tbl_lock);
6994cdd7 956
3be0f80b
TM		 957 if (likely(!slot->interrupted))
958 break;
959 nfs4_sequence_process_interrupted(client,
960 slot, task->tk_msg.rpc_cred);
3d35808b 961 }
3d35808b 962
3be0f80b 963 nfs4_sequence_attach_slot(args, res, slot);
3d35808b 964
ad05cc0f 965 trace_nfs4_setup_sequence(session, args);
9dd9107f
AS		 966out_start:
967 rpc_call_start(task);
968 return 0;
0dcee8bb
AS		 969
970out_sleep:
971 if (args->sa_privileged)
972 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
973 NULL, RPC_PRIORITY_PRIVILEGED);
974 else
975 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
976 spin_unlock(&tbl->slot_tbl_lock);
977 return -EAGAIN;
7981c8a6
AS		 978}
979EXPORT_SYMBOL_GPL(nfs4_setup_sequence);
980
9915ea7e
CL		 981static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
982{
983 struct nfs4_call_sync_data *data = calldata;
42e1cca7 984 nfs4_setup_sequence(data->seq_server->nfs_client,
9915ea7e
CL		 985 data->seq_args, data->seq_res, task);
986}
987
988static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
989{
990 struct nfs4_call_sync_data *data = calldata;
991 nfs4_sequence_done(task, data->seq_res);
992}
993
994static const struct rpc_call_ops nfs40_call_sync_ops = {
995 .rpc_call_prepare = nfs40_call_sync_prepare,
996 .rpc_call_done = nfs40_call_sync_done,
997};
998
7c513058
BS		 999static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
1000 struct nfs_server *server,
ce5039c1
AA		 1001 struct rpc_message *msg,
1002 struct nfs4_sequence_args *args,
8fe72bac 1003 struct nfs4_sequence_res *res)
ce5039c1
AA		 1004{
1005 int ret;
1006 struct rpc_task *task;
9915ea7e 1007 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 1008 struct nfs4_call_sync_data data = {
035168ab 1009 .seq_server = server,
ce5039c1
AA		 1010 .seq_args = args,
1011 .seq_res = res,
ce5039c1
AA		 1012 };
1013 struct rpc_task_setup task_setup = {
7c513058 1014 .rpc_client = clnt,
ce5039c1 1015 .rpc_message = msg,
9915ea7e 1016 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 1017 .callback_data = &data
1018 };
1019
ce5039c1
AA		 1020 task = rpc_run_task(&task_setup);
1021 if (IS_ERR(task))
1022 ret = PTR_ERR(task);
1023 else {
1024 ret = task->tk_status;
1025 rpc_put_task(task);
1026 }
1027 return ret;
1028}
1029
7c513058
BS		 1030int nfs4_call_sync(struct rpc_clnt *clnt,
1031 struct nfs_server *server,
e73b83f2
BS		 1032 struct rpc_message *msg,
1033 struct nfs4_sequence_args *args,
1034 struct nfs4_sequence_res *res,
1035 int cache_reply)
1036{
a9c92d6b 1037 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 1038 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 1039}
cccef3b9 1040
d3129ef6
TM		 1041static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo,
1042 unsigned long timestamp)
1da177e4 1043{
38478b24 1044 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 1045
38478b24 1046 spin_lock(&dir->i_lock);
359d7d1c 1047 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
e603a4c1
TM		 1048 if (cinfo->atomic && cinfo->before == dir->i_version) {
1049 nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE;
1050 nfsi->attrtimeo_timestamp = jiffies;
1051 } else {
bfc69a45 1052 nfs_force_lookup_revalidate(dir);
e603a4c1
TM		 1053 if (cinfo->before != dir->i_version)
1054 nfsi->cache_validity |= NFS_INO_INVALID_ACCESS |
1055 NFS_INO_INVALID_ACL;
1056 }
a9a4a87a 1057 dir->i_version = cinfo->after;
d3129ef6 1058 nfsi->read_cache_jiffies = timestamp;
3235b403 1059 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
de242c0b 1060 nfs_fscache_invalidate(dir);
38478b24 1061 spin_unlock(&dir->i_lock);
1da177e4
LT		 1062}
1063
e56e0b78 1064struct nfs4_opendata {
c6d00e63 1065 struct kref kref;
e56e0b78
TM		 1066 struct nfs_openargs o_arg;
1067 struct nfs_openres o_res;
cdd4e68b
TM		 1068 struct nfs_open_confirmargs c_arg;
1069 struct nfs_open_confirmres c_res;
6926afd1
TM		 1070 struct nfs4_string owner_name;
1071 struct nfs4_string group_name;
a49c2691 1072 struct nfs4_label *a_label;
e56e0b78 1073 struct nfs_fattr f_attr;
1775fd3e 1074 struct nfs4_label *f_label;
e56e0b78 1075 struct dentry *dir;
82a2c1b7 1076 struct dentry *dentry;
e56e0b78 1077 struct nfs4_state_owner *owner;
aac00a8d 1078 struct nfs4_state *state;
e56e0b78 1079 struct iattr attrs;
26e976a8 1080 unsigned long timestamp;
a7a3b1e9
BC		 1081 bool rpc_done;
1082 bool file_created;
1083 bool is_recover;
1084 bool cancelled;
24ac23ab 1085 int rpc_status;
e56e0b78
TM		 1086};
1087
8fd1ab74
TM		 1088struct nfs4_open_createattrs {
1089 struct nfs4_label *label;
1090 struct iattr *sattr;
1091 const __u32 verf[2];
1092};
1093
49f9a0fa
TM		 1094static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1095 int err, struct nfs4_exception *exception)
1096{
1097 if (err != -EINVAL)
1098 return false;
1099 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1100 return false;
1101 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1102 exception->retry = 1;
1103 return true;
1104}
1105
6ae37339
TM		 1106static u32
1107nfs4_map_atomic_open_share(struct nfs_server *server,
1108 fmode_t fmode, int openflags)
1109{
1110 u32 res = 0;
1111
1112 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1113 case FMODE_READ:
1114 res = NFS4_SHARE_ACCESS_READ;
1115 break;
1116 case FMODE_WRITE:
1117 res = NFS4_SHARE_ACCESS_WRITE;
1118 break;
1119 case FMODE_READ|FMODE_WRITE:
1120 res = NFS4_SHARE_ACCESS_BOTH;
1121 }
1122 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1123 goto out;
1124 /* Want no delegation if we're using O_DIRECT */
1125 if (openflags & O_DIRECT)
1126 res |= NFS4_SHARE_WANT_NO_DELEG;
1127out:
1128 return res;
1129}
1130
49f9a0fa
TM		 1131static enum open_claim_type4
1132nfs4_map_atomic_open_claim(struct nfs_server *server,
1133 enum open_claim_type4 claim)
1134{
1135 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1136 return claim;
1137 switch (claim) {
1138 default:
1139 return claim;
1140 case NFS4_OPEN_CLAIM_FH:
1141 return NFS4_OPEN_CLAIM_NULL;
1142 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1143 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1144 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1145 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1146 }
1147}
2ced46c2
TM		 1148
1149static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1150{
1151 p->o_res.f_attr = &p->f_attr;
1775fd3e 1152 p->o_res.f_label = p->f_label;
c1d51931
TM		 1153 p->o_res.seqid = p->o_arg.seqid;
1154 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 1155 p->o_res.server = p->o_arg.server;
5f657530 1156 p->o_res.access_request = p->o_arg.access;
2ced46c2 1157 nfs_fattr_init(&p->f_attr);
6926afd1 1158 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 1159}
1160
82a2c1b7 1161static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 1162 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8fd1ab74 1163 const struct nfs4_open_createattrs *c,
4a1c0893 1164 enum open_claim_type4 claim,
8535b2be 1165 gfp_t gfp_mask)
e56e0b78 1166{
82a2c1b7 1167 struct dentry *parent = dget_parent(dentry);
2b0143b5 1168 struct inode *dir = d_inode(parent);
e56e0b78 1169 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1170 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
8fd1ab74 1171 struct nfs4_label *label = (c != NULL) ? c->label : NULL;
e56e0b78
TM		 1172 struct nfs4_opendata *p;
1173
8535b2be 1174 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1175 if (p == NULL)
1176 goto err;
14c43f76
DQ		 1177
1178 p->f_label = nfs4_label_alloc(server, gfp_mask);
1179 if (IS_ERR(p->f_label))
1180 goto err_free_p;
1181
a49c2691
KM		 1182 p->a_label = nfs4_label_alloc(server, gfp_mask);
1183 if (IS_ERR(p->a_label))
1184 goto err_free_f;
1185
63f5f796
TM		 1186 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1187 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1188 if (IS_ERR(p->o_arg.seqid))
14c43f76 1189 goto err_free_label;
82a2c1b7
AV		 1190 nfs_sb_active(dentry->d_sb);
1191 p->dentry = dget(dentry);
e56e0b78
TM		 1192 p->dir = parent;
1193 p->owner = sp;
1194 atomic_inc(&sp->so_count);
dc0b027d
TM		 1195 p->o_arg.open_flags = flags;
1196 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
dff25ddb 1197 p->o_arg.umask = current_umask();
536585cc 1198 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
6ae37339
TM		 1199 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1200 fmode, flags);
ae2bb032
WAA		 1201 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1202 * will return permission denied for all bits until close */
1203 if (!(flags & O_EXCL)) {
1204 /* ask server to check for all possible rights as results
1205 * are cached */
536585cc
TM		 1206 switch (p->o_arg.claim) {
1207 default:
1208 break;
1209 case NFS4_OPEN_CLAIM_NULL:
1210 case NFS4_OPEN_CLAIM_FH:
1211 p->o_arg.access = NFS4_ACCESS_READ |
1212 NFS4_ACCESS_MODIFY |
1213 NFS4_ACCESS_EXTEND |
1214 NFS4_ACCESS_EXECUTE;
1215 }
ae2bb032 1216 }
7539bbab 1217 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1218 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1219 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1220 p->o_arg.name = &dentry->d_name;
e56e0b78 1221 p->o_arg.server = server;
aa9c2669 1222 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1223 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
a49c2691 1224 p->o_arg.label = nfs4_label_copy(p->a_label, label);
49f9a0fa 1225 switch (p->o_arg.claim) {
4a1c0893
TM		 1226 case NFS4_OPEN_CLAIM_NULL:
1227 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1228 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1229 p->o_arg.fh = NFS_FH(dir);
1230 break;
1231 case NFS4_OPEN_CLAIM_PREVIOUS:
1232 case NFS4_OPEN_CLAIM_FH:
1233 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1234 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1235 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1236 }
8fd1ab74 1237 if (c != NULL && c->sattr != NULL && c->sattr->ia_valid != 0) {
e56e0b78 1238 p->o_arg.u.attrs = &p->attrs;
8fd1ab74 1239 memcpy(&p->attrs, c->sattr, sizeof(p->attrs));
cd93710e 1240
8fd1ab74 1241 memcpy(p->o_arg.u.verifier.data, c->verf,
cd93710e 1242 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1243 }
cdd4e68b
TM		 1244 p->c_arg.fh = &p->o_res.fh;
1245 p->c_arg.stateid = &p->o_res.stateid;
1246 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1247 nfs4_init_opendata_res(p);
c6d00e63 1248 kref_init(&p->kref);
e56e0b78 1249 return p;
14c43f76
DQ		 1250
1251err_free_label:
a49c2691
KM		 1252 nfs4_label_free(p->a_label);
1253err_free_f:
14c43f76
DQ		 1254 nfs4_label_free(p->f_label);
1255err_free_p:
e56e0b78
TM		 1256 kfree(p);
1257err:
1258 dput(parent);
1259 return NULL;
1260}
1261
c6d00e63 1262static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1263{
c6d00e63
TM		 1264 struct nfs4_opendata *p = container_of(kref,
1265 struct nfs4_opendata, kref);
82a2c1b7 1266 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1267
1268 nfs_free_seqid(p->o_arg.seqid);
2e80dbe7 1269 nfs4_sequence_free_slot(&p->o_res.seq_res);
aac00a8d
TM		 1270 if (p->state != NULL)
1271 nfs4_put_open_state(p->state);
c6d00e63 1272 nfs4_put_state_owner(p->owner);
14c43f76 1273
a49c2691 1274 nfs4_label_free(p->a_label);
14c43f76
DQ		 1275 nfs4_label_free(p->f_label);
1276
c6d00e63 1277 dput(p->dir);
82a2c1b7
AV		 1278 dput(p->dentry);
1279 nfs_sb_deactive(sb);
6926afd1 1280 nfs_fattr_free_names(&p->f_attr);
e911b815 1281 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1282 kfree(p);
1283}
1284
1285static void nfs4_opendata_put(struct nfs4_opendata *p)
1286{
1287 if (p != NULL)
1288 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1289}
1290
24311f88
TM		 1291static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1292 fmode_t fmode)
1293{
1294 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1295 case FMODE_READ|FMODE_WRITE:
1296 return state->n_rdwr != 0;
1297 case FMODE_WRITE:
1298 return state->n_wronly != 0;
1299 case FMODE_READ:
1300 return state->n_rdonly != 0;
1301 }
1302 WARN_ON_ONCE(1);
1303 return false;
1304}
1305
dc0b027d 1306static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1307{
1308 int ret = 0;
dc0b027d 1309
536e43d1 1310 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1311 goto out;
1312 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1313 case FMODE_READ:
88069f77
TM		 1314 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1315 && state->n_rdonly != 0;
6ee41268
TM		 1316 break;
1317 case FMODE_WRITE:
88069f77
TM		 1318 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1319 && state->n_wronly != 0;
6ee41268
TM		 1320 break;
1321 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1322 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1323 && state->n_rdwr != 0;
6ee41268 1324 }
dc0b027d 1325out:
6ee41268
TM		 1326 return ret;
1327}
1328
2a606188
TM		 1329static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1330 enum open_claim_type4 claim)
aac00a8d 1331{
652f89f6
TM		 1332 if (delegation == NULL)
1333 return 0;
dc0b027d 1334 if ((delegation->type & fmode) != fmode)
aac00a8d 1335 return 0;
d25be546
TM		 1336 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1337 return 0;
2a606188
TM		 1338 switch (claim) {
1339 case NFS4_OPEN_CLAIM_NULL:
1340 case NFS4_OPEN_CLAIM_FH:
1341 break;
1342 case NFS4_OPEN_CLAIM_PREVIOUS:
1343 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1344 break;
1345 default:
1346 return 0;
1347 }
b7391f44 1348 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1349 return 1;
1350}
1351
dc0b027d 1352static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1353{
dc0b027d 1354 switch (fmode) {
e7616923
TM		 1355 case FMODE_WRITE:
1356 state->n_wronly++;
1357 break;
1358 case FMODE_READ:
1359 state->n_rdonly++;
1360 break;
1361 case FMODE_READ|FMODE_WRITE:
1362 state->n_rdwr++;
1363 }
dc0b027d 1364 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1365}
1366
8a64c4ef
TM		 1367#ifdef CONFIG_NFS_V4_1
1368static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state)
1369{
1370 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags))
1371 return true;
1372 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags))
1373 return true;
1374 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags))
1375 return true;
1376 return false;
1377}
1378#endif /* CONFIG_NFS_V4_1 */
1379
c9399f21
TM		 1380static void nfs_state_log_update_open_stateid(struct nfs4_state *state)
1381{
1382 if (test_and_clear_bit(NFS_STATE_CHANGE_WAIT, &state->flags))
1383 wake_up_all(&state->waitq);
1384}
1385
1386static void nfs_state_log_out_of_order_open_stateid(struct nfs4_state *state,
1387 const nfs4_stateid *stateid)
1388{
1389 u32 state_seqid = be32_to_cpu(state->open_stateid.seqid);
1390 u32 stateid_seqid = be32_to_cpu(stateid->seqid);
1391
1392 if (stateid_seqid == state_seqid + 1U ||
1393 (stateid_seqid == 1U && state_seqid == 0xffffffffU))
1394 nfs_state_log_update_open_stateid(state);
1395 else
1396 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags);
1397}
1398
4f14c194
TM		 1399static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1400{
1401 struct nfs_client *clp = state->owner->so_server->nfs_client;
1402 bool need_recover = false;
1403
1404 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1405 need_recover = true;
1406 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1407 need_recover = true;
1408 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1409 need_recover = true;
1410 if (need_recover)
1411 nfs4_state_mark_reclaim_nograce(clp, state);
1412}
1413
c9399f21
TM		 1414/*
1415 * Check for whether or not the caller may update the open stateid
1416 * to the value passed in by stateid.
1417 *
1418 * Note: This function relies heavily on the server implementing
1419 * RFC7530 Section 9.1.4.2, and RFC5661 Section 8.2.2
1420 * correctly.
1421 * i.e. The stateid seqids have to be initialised to 1, and
1422 * are then incremented on every state transition.
1423 */
e999e80e 1424static bool nfs_need_update_open_stateid(struct nfs4_state *state,
c9399f21 1425 const nfs4_stateid *stateid)
e999e80e 1426{
c9399f21
TM		 1427 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0 ||
1428 !nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1429 if (stateid->seqid == cpu_to_be32(1))
1430 nfs_state_log_update_open_stateid(state);
1431 else
1432 set_bit(NFS_STATE_CHANGE_WAIT, &state->flags);
e999e80e 1433 return true;
4f14c194 1434 }
c9399f21
TM		 1435
1436 if (nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1437 nfs_state_log_out_of_order_open_stateid(state, stateid);
e999e80e 1438 return true;
c9399f21 1439 }
e999e80e
TM		 1440 return false;
1441}
1442
f95549cf
TM		 1443static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1444{
3c38cbe2
TM		 1445 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1446 return;
f95549cf
TM		 1447 if (state->n_wronly)
1448 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1449 if (state->n_rdonly)
1450 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1451 if (state->n_rdwr)
1452 set_bit(NFS_O_RDWR_STATE, &state->flags);
3c38cbe2 1453 set_bit(NFS_OPEN_STATE, &state->flags);
f95549cf
TM		 1454}
1455
226056c5
TM		 1456static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1457 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1458{
226056c5
TM		 1459 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1460 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1461 case FMODE_WRITE:
1462 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1463 break;
1464 case FMODE_READ:
1465 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1466 break;
1467 case 0:
1468 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1469 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1470 clear_bit(NFS_OPEN_STATE, &state->flags);
1471 }
1472 if (stateid == NULL)
1473 return;
3e7dfb16
TM		 1474 /* Handle OPEN+OPEN_DOWNGRADE races */
1475 if (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1476 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
f95549cf 1477 nfs_resync_open_stateid_locked(state);
c9399f21 1478 goto out;
f95549cf 1479 }
003707c7 1480 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1481 nfs4_stateid_copy(&state->stateid, stateid);
1482 nfs4_stateid_copy(&state->open_stateid, stateid);
ad9e02dc 1483 trace_nfs4_open_stateid_update(state->inode, stateid, 0);
c9399f21
TM		 1484out:
1485 nfs_state_log_update_open_stateid(state);
226056c5
TM		 1486}
1487
4a1e2feb
TM		 1488static void nfs_clear_open_stateid(struct nfs4_state *state,
1489 nfs4_stateid *arg_stateid,
1490 nfs4_stateid *stateid, fmode_t fmode)
226056c5
TM		 1491{
1492 write_seqlock(&state->seqlock);
3e7dfb16
TM		 1493 /* Ignore, if the CLOSE argment doesn't match the current stateid */
1494 if (nfs4_state_match_open_stateid_other(state, arg_stateid))
1495 nfs_clear_open_stateid_locked(state, stateid, fmode);
226056c5 1496 write_sequnlock(&state->seqlock);
4f14c194
TM		 1497 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1498 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1499}
1500
1393d961 1501static void nfs_set_open_stateid_locked(struct nfs4_state *state,
c9399f21 1502 const nfs4_stateid *stateid, nfs4_stateid *freeme)
003707c7 1503{
c9399f21
TM		 1504 DEFINE_WAIT(wait);
1505 int status = 0;
1506 for (;;) {
1507
1508 if (!nfs_need_update_open_stateid(state, stateid))
1509 return;
1510 if (!test_bit(NFS_STATE_CHANGE_WAIT, &state->flags))
003707c7 1511 break;
c9399f21 1512 if (status)
003707c7 1513 break;
c9399f21
TM		 1514 /* Rely on seqids for serialisation with NFSv4.0 */
1515 if (!nfs4_has_session(NFS_SERVER(state->inode)->nfs_client))
1516 break;
1517
1518 prepare_to_wait(&state->waitq, &wait, TASK_KILLABLE);
1519 /*
1520 * Ensure we process the state changes in the same order
1521 * in which the server processed them by delaying the
1522 * update of the stateid until we are in sequence.
1523 */
1524 write_sequnlock(&state->seqlock);
1525 spin_unlock(&state->owner->so_lock);
1526 rcu_read_unlock();
ad9e02dc 1527 trace_nfs4_open_stateid_update_wait(state->inode, stateid, 0);
c9399f21
TM		 1528 if (!signal_pending(current)) {
1529 if (schedule_timeout(5*HZ) == 0)
1530 status = -EAGAIN;
1531 else
1532 status = 0;
1533 } else
1534 status = -EINTR;
1535 finish_wait(&state->waitq, &wait);
1536 rcu_read_lock();
1537 spin_lock(&state->owner->so_lock);
1538 write_seqlock(&state->seqlock);
003707c7 1539 }
c9399f21 1540
e1fff5df
TM		 1541 if (test_bit(NFS_OPEN_STATE, &state->flags) &&
1542 !nfs4_stateid_match_other(stateid, &state->open_stateid)) {
c9399f21
TM		 1543 nfs4_stateid_copy(freeme, &state->open_stateid);
1544 nfs_test_and_clear_all_open_stateid(state);
1545 }
1546
e999e80e
TM		 1547 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1548 nfs4_stateid_copy(&state->stateid, stateid);
1549 nfs4_stateid_copy(&state->open_stateid, stateid);
ad9e02dc 1550 trace_nfs4_open_stateid_update(state->inode, stateid, status);
c9399f21 1551 nfs_state_log_update_open_stateid(state);
003707c7
TM		 1552}
1553
c9399f21 1554static void nfs_state_set_open_stateid(struct nfs4_state *state,
1393d961 1555 const nfs4_stateid *open_stateid,
1393d961
TM		 1556 fmode_t fmode,
1557 nfs4_stateid *freeme)
1da177e4 1558{
8bda4e4c
TM		 1559 /*
1560 * Protect the call to nfs4_state_set_mode_locked and
1561 * serialise the stateid update
1562 */
1563 write_seqlock(&state->seqlock);
c9399f21
TM		 1564 nfs_set_open_stateid_locked(state, open_stateid, freeme);
1565 switch (fmode) {
1566 case FMODE_READ:
1567 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1568 break;
1569 case FMODE_WRITE:
1570 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1571 break;
1572 case FMODE_READ|FMODE_WRITE:
1573 set_bit(NFS_O_RDWR_STATE, &state->flags);
003707c7 1574 }
c9399f21
TM		 1575 set_bit(NFS_OPEN_STATE, &state->flags);
1576 write_sequnlock(&state->seqlock);
1577}
1578
1579static void nfs_state_set_delegation(struct nfs4_state *state,
1580 const nfs4_stateid *deleg_stateid,
1581 fmode_t fmode)
1582{
1583 /*
1584 * Protect the call to nfs4_state_set_mode_locked and
1585 * serialise the stateid update
1586 */
1587 write_seqlock(&state->seqlock);
1588 nfs4_stateid_copy(&state->stateid, deleg_stateid);
1589 set_bit(NFS_DELEGATED_STATE, &state->flags);
8bda4e4c 1590 write_sequnlock(&state->seqlock);
1da177e4
LT		 1591}
1592
1393d961
TM		 1593static int update_open_stateid(struct nfs4_state *state,
1594 const nfs4_stateid *open_stateid,
1595 const nfs4_stateid *delegation,
1596 fmode_t fmode)
34310430 1597{
1393d961
TM		 1598 struct nfs_server *server = NFS_SERVER(state->inode);
1599 struct nfs_client *clp = server->nfs_client;
34310430
TM		 1600 struct nfs_inode *nfsi = NFS_I(state->inode);
1601 struct nfs_delegation *deleg_cur;
83aa3e0f 1602 nfs4_stateid freeme = { };
34310430
TM		 1603 int ret = 0;
1604
dc0b027d 1605 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1606
1607 rcu_read_lock();
c9399f21
TM		 1608 spin_lock(&state->owner->so_lock);
1609 if (open_stateid != NULL) {
1610 nfs_state_set_open_stateid(state, open_stateid, fmode, &freeme);
1611 ret = 1;
1612 }
1613
34310430
TM		 1614 deleg_cur = rcu_dereference(nfsi->delegation);
1615 if (deleg_cur == NULL)
1616 goto no_delegation;
1617
1618 spin_lock(&deleg_cur->lock);
17f26b12 1619 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1620 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1621 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1622 goto no_delegation_unlock;
1623
1624 if (delegation == NULL)
1625 delegation = &deleg_cur->stateid;
f597c537 1626 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1627 goto no_delegation_unlock;
1628
b7391f44 1629 nfs_mark_delegation_referenced(deleg_cur);
c9399f21 1630 nfs_state_set_delegation(state, &deleg_cur->stateid, fmode);
34310430
TM		 1631 ret = 1;
1632no_delegation_unlock:
1633 spin_unlock(&deleg_cur->lock);
1634no_delegation:
c9399f21
TM		 1635 if (ret)
1636 update_open_stateflags(state, fmode);
1637 spin_unlock(&state->owner->so_lock);
34310430
TM		 1638 rcu_read_unlock();
1639
4f14c194 1640 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1393d961
TM		 1641 nfs4_schedule_state_manager(clp);
1642 if (freeme.type != 0)
1643 nfs4_test_and_free_stateid(server, &freeme,
1644 state->owner->so_cred);
34310430
TM		 1645
1646 return ret;
1647}
1648
39071e6f
TM		 1649static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1650 const nfs4_stateid *stateid)
1651{
1652 struct nfs4_state *state = lsp->ls_state;
1653 bool ret = false;
1654
1655 spin_lock(&state->state_lock);
1656 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1657 goto out_noupdate;
1658 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1659 goto out_noupdate;
1660 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1661 ret = true;
1662out_noupdate:
1663 spin_unlock(&state->state_lock);
1664 return ret;
1665}
34310430 1666
dc0b027d 1667static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1668{
1669 struct nfs_delegation *delegation;
1670
1671 rcu_read_lock();
1672 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1673 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1674 rcu_read_unlock();
1675 return;
1676 }
1677 rcu_read_unlock();
57ec14c5 1678 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1679}
1680
6ee41268 1681static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1682{
1683 struct nfs4_state *state = opendata->state;
1684 struct nfs_inode *nfsi = NFS_I(state->inode);
1685 struct nfs_delegation *delegation;
f448badd 1686 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1687 fmode_t fmode = opendata->o_arg.fmode;
2a606188 1688 enum open_claim_type4 claim = opendata->o_arg.claim;
aac00a8d
TM		 1689 nfs4_stateid stateid;
1690 int ret = -EAGAIN;
1691
aac00a8d 1692 for (;;) {
61beef75 1693 spin_lock(&state->owner->so_lock);
dc0b027d 1694 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1695 update_open_stateflags(state, fmode);
6ee41268 1696 spin_unlock(&state->owner->so_lock);
61beef75 1697 goto out_return_state;
6ee41268 1698 }
61beef75 1699 spin_unlock(&state->owner->so_lock);
34310430
TM		 1700 rcu_read_lock();
1701 delegation = rcu_dereference(nfsi->delegation);
2a606188 1702 if (!can_open_delegated(delegation, fmode, claim)) {
34310430 1703 rcu_read_unlock();
aac00a8d 1704 break;
34310430 1705 }
aac00a8d 1706 /* Save the delegation */
f597c537 1707 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1708 rcu_read_unlock();
fa332941 1709 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1710 if (!opendata->is_recover) {
1711 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1712 if (ret != 0)
1713 goto out;
1714 }
aac00a8d 1715 ret = -EAGAIN;
34310430
TM		 1716
1717 /* Try to update the stateid using the delegation */
dc0b027d 1718 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1719 goto out_return_state;
aac00a8d 1720 }
aac00a8d
TM		 1721out:
1722 return ERR_PTR(ret);
1723out_return_state:
1724 atomic_inc(&state->count);
1725 return state;
1726}
1727
e23008ec
AA		 1728static void
1729nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1730{
1731 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1732 struct nfs_delegation *delegation;
1733 int delegation_flags = 0;
1734
1735 rcu_read_lock();
1736 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1737 if (delegation)
1738 delegation_flags = delegation->flags;
1739 rcu_read_unlock();
72d79ff8
TM		 1740 switch (data->o_arg.claim) {
1741 default:
1742 break;
1743 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1744 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
e23008ec
AA		 1745 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1746 "returning a delegation for "
1747 "OPEN(CLAIM_DELEGATE_CUR)\n",
1748 clp->cl_hostname);
72d79ff8
TM		 1749 return;
1750 }
1751 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
e23008ec
AA		 1752 nfs_inode_set_delegation(state->inode,
1753 data->owner->so_cred,
1754 &data->o_res);
1755 else
1756 nfs_inode_reclaim_delegation(state->inode,
1757 data->owner->so_cred,
1758 &data->o_res);
1759}
1760
1761/*
1762 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1763 * and update the nfs4_state.
1764 */
1765static struct nfs4_state *
1766_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1767{
1768 struct inode *inode = data->state->inode;
1769 struct nfs4_state *state = data->state;
1770 int ret;
1771
d2bfda2e 1772 if (!data->rpc_done) {
37a8484a
AS		 1773 if (data->rpc_status)
1774 return ERR_PTR(data->rpc_status);
d2bfda2e
WAA		 1775 /* cached opens have already been processed */
1776 goto update;
e23008ec
AA		 1777 }
1778
e23008ec
AA		 1779 ret = nfs_refresh_inode(inode, &data->f_attr);
1780 if (ret)
37a8484a 1781 return ERR_PTR(ret);
e23008ec
AA		 1782
1783 if (data->o_res.delegation_type != 0)
1784 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1785update:
e23008ec
AA		 1786 update_open_stateid(state, &data->o_res.stateid, NULL,
1787 data->o_arg.fmode);
d49f042a 1788 atomic_inc(&state->count);
e23008ec
AA		 1789
1790 return state;
e23008ec
AA		 1791}
1792
4e2fcac7
TM		 1793static struct inode *
1794nfs4_opendata_get_inode(struct nfs4_opendata *data)
1795{
1796 struct inode *inode;
1797
1798 switch (data->o_arg.claim) {
1799 case NFS4_OPEN_CLAIM_NULL:
1800 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1801 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1802 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1803 return ERR_PTR(-EAGAIN);
1804 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh,
1805 &data->f_attr, data->f_label);
1806 break;
1807 default:
1808 inode = d_inode(data->dentry);
1809 ihold(inode);
1810 nfs_refresh_inode(inode, &data->f_attr);
1811 }
1812 return inode;
1813}
1814
e23008ec 1815static struct nfs4_state *
75e8c48b 1816nfs4_opendata_find_nfs4_state(struct nfs4_opendata *data)
24ac23ab 1817{
75e8c48b 1818 struct nfs4_state *state;
24ac23ab 1819 struct inode *inode;
75e8c48b
TM		 1820
1821 inode = nfs4_opendata_get_inode(data);
1822 if (IS_ERR(inode))
1823 return ERR_CAST(inode);
1824 if (data->state != NULL && data->state->inode == inode) {
1825 state = data->state;
1826 atomic_inc(&state->count);
1827 } else
1828 state = nfs4_get_open_state(inode, data->owner);
1829 iput(inode);
1830 if (state == NULL)
1831 state = ERR_PTR(-ENOMEM);
1832 return state;
1833}
1834
1835static struct nfs4_state *
1836_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1837{
1838 struct nfs4_state *state;
24ac23ab 1839
aac00a8d 1840 if (!data->rpc_done) {
6ee41268 1841 state = nfs4_try_open_cached(data);
9759b0fb 1842 trace_nfs4_cached_open(data->state);
aac00a8d
TM		 1843 goto out;
1844 }
1845
75e8c48b
TM		 1846 state = nfs4_opendata_find_nfs4_state(data);
1847 if (IS_ERR(state))
1848 goto out;
1849
e23008ec
AA		 1850 if (data->o_res.delegation_type != 0)
1851 nfs4_opendata_check_deleg(data, state);
34310430 1852 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1853 data->o_arg.fmode);
aac00a8d 1854out:
7aa262b5 1855 nfs_release_seqid(data->o_arg.seqid);
24ac23ab
TM		 1856 return state;
1857}
1858
e23008ec
AA		 1859static struct nfs4_state *
1860nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1861{
2e80dbe7
TM		 1862 struct nfs4_state *ret;
1863
e23008ec 1864 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
2e80dbe7
TM		 1865 ret =_nfs4_opendata_reclaim_to_nfs4_state(data);
1866 else
1867 ret = _nfs4_opendata_to_nfs4_state(data);
1868 nfs4_sequence_free_slot(&data->o_res.seq_res);
1869 return ret;
e23008ec
AA		 1870}
1871
864472e9
TM		 1872static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1873{
1874 struct nfs_inode *nfsi = NFS_I(state->inode);
1875 struct nfs_open_context *ctx;
1876
1877 spin_lock(&state->inode->i_lock);
1878 list_for_each_entry(ctx, &nfsi->open_files, list) {
1879 if (ctx->state != state)
1880 continue;
1881 get_nfs_open_context(ctx);
1882 spin_unlock(&state->inode->i_lock);
1883 return ctx;
1884 }
1885 spin_unlock(&state->inode->i_lock);
1886 return ERR_PTR(-ENOENT);
1887}
1888
4a1c0893
TM		 1889static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1890 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1891{
1892 struct nfs4_opendata *opendata;
1893
4a1c0893 1894 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
8fd1ab74 1895 NULL, claim, GFP_NOFS);
6f220ed5
TM		 1896 if (opendata == NULL)
1897 return ERR_PTR(-ENOMEM);
1898 opendata->state = state;
1899 atomic_inc(&state->count);
1900 return opendata;
1901}
1902
24311f88
TM		 1903static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1904 fmode_t fmode)
864472e9 1905{
2ced46c2 1906 struct nfs4_state *newstate;
864472e9
TM		 1907 int ret;
1908
24311f88 1909 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
39f897fd 1910 return 0;
dc0b027d
TM		 1911 opendata->o_arg.open_flags = 0;
1912 opendata->o_arg.fmode = fmode;
be36e185
TM		 1913 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1914 NFS_SB(opendata->dentry->d_sb),
1915 fmode, 0);
2ced46c2
TM		 1916 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1917 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1918 nfs4_init_opendata_res(opendata);
b257957e 1919 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1920 if (ret != 0)
1921 return ret;
2ced46c2 1922 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1923 if (IS_ERR(newstate))
1924 return PTR_ERR(newstate);
24311f88
TM		 1925 if (newstate != opendata->state)
1926 ret = -ESTALE;
643168c2 1927 nfs4_close_state(newstate, fmode);
24311f88 1928 return ret;
864472e9
TM		 1929}
1930
1931static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1932{
864472e9
TM		 1933 int ret;
1934
4f14c194
TM		 1935 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1936 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1937 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1938 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1939 /* memory barrier prior to reading state->n_* */
2ced46c2 1940 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1941 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9 1942 smp_rmb();
24311f88
TM		 1943 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1944 if (ret != 0)
1945 return ret;
1946 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1947 if (ret != 0)
1948 return ret;
1949 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1950 if (ret != 0)
1951 return ret;
1ac7e2fd
TM		 1952 /*
1953 * We may have performed cached opens for all three recoveries.
1954 * Check if we need to update the current stateid.
1955 */
1956 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1957 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1958 write_seqlock(&state->seqlock);
1ac7e2fd 1959 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1960 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1961 write_sequnlock(&state->seqlock);
1ac7e2fd 1962 }
864472e9
TM		 1963 return 0;
1964}
1965
1da177e4
LT		 1966/*
1967 * OPEN_RECLAIM:
1968 * reclaim state on the server after a reboot.
1da177e4 1969 */
539cd03a 1970static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1971{
1ac7e2fd 1972 struct nfs_delegation *delegation;
864472e9 1973 struct nfs4_opendata *opendata;
dc0b027d 1974 fmode_t delegation_type = 0;
1da177e4
LT		 1975 int status;
1976
4a1c0893
TM		 1977 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1978 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1979 if (IS_ERR(opendata))
1980 return PTR_ERR(opendata);
1ac7e2fd
TM		 1981 rcu_read_lock();
1982 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1983 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1984 delegation_type = delegation->type;
1ac7e2fd 1985 rcu_read_unlock();
864472e9
TM		 1986 opendata->o_arg.u.delegation_type = delegation_type;
1987 status = nfs4_open_recover(opendata, state);
c6d00e63 1988 nfs4_opendata_put(opendata);
1da177e4
LT		 1989 return status;
1990}
1991
539cd03a 1992static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1993{
1994 struct nfs_server *server = NFS_SERVER(state->inode);
1995 struct nfs4_exception exception = { };
1996 int err;
1997 do {
539cd03a 1998 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1999 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 2000 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2001 continue;
168667c4 2002 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 2003 break;
2004 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 2005 } while (exception.retry);
2006 return err;
2007}
2008
864472e9
TM		 2009static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
2010{
2011 struct nfs_open_context *ctx;
2012 int ret;
2013
2014 ctx = nfs4_state_find_open_context(state);
2015 if (IS_ERR(ctx))
91876b13 2016 return -EAGAIN;
539cd03a 2017 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 2018 put_nfs_open_context(ctx);
2019 return ret;
2020}
2021
db4f2e63 2022static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 2023{
be76b5b6
TM		 2024 switch (err) {
2025 default:
2026 printk(KERN_ERR "NFS: %s: unhandled error "
2027 "%d.\n", __func__, err);
2028 case 0:
2029 case -ENOENT:
8eee52af 2030 case -EAGAIN:
be76b5b6
TM		 2031 case -ESTALE:
2032 break;
2033 case -NFS4ERR_BADSESSION:
2034 case -NFS4ERR_BADSLOT:
2035 case -NFS4ERR_BAD_HIGH_SLOT:
2036 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
2037 case -NFS4ERR_DEADSESSION:
2038 set_bit(NFS_DELEGATED_STATE, &state->flags);
2039 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
2040 return -EAGAIN;
2041 case -NFS4ERR_STALE_CLIENTID:
2042 case -NFS4ERR_STALE_STATEID:
2043 set_bit(NFS_DELEGATED_STATE, &state->flags);
be76b5b6
TM		 2044 /* Don't recall a delegation if it was lost */
2045 nfs4_schedule_lease_recovery(server->nfs_client);
2046 return -EAGAIN;
352297b9
CL		 2047 case -NFS4ERR_MOVED:
2048 nfs4_schedule_migration_recovery(server);
2049 return -EAGAIN;
8ef2f8d4
CL		 2050 case -NFS4ERR_LEASE_MOVED:
2051 nfs4_schedule_lease_moved_recovery(server->nfs_client);
2052 return -EAGAIN;
be76b5b6
TM		 2053 case -NFS4ERR_DELEG_REVOKED:
2054 case -NFS4ERR_ADMIN_REVOKED:
404ea356 2055 case -NFS4ERR_EXPIRED:
be76b5b6 2056 case -NFS4ERR_BAD_STATEID:
db4f2e63 2057 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 2058 nfs_inode_find_state_and_recover(state->inode,
2059 stateid);
2060 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 2061 return -EAGAIN;
be76b5b6
TM		 2062 case -NFS4ERR_DELAY:
2063 case -NFS4ERR_GRACE:
2064 set_bit(NFS_DELEGATED_STATE, &state->flags);
2065 ssleep(1);
2066 return -EAGAIN;
db4f2e63
TM		 2067 case -ENOMEM:
2068 case -NFS4ERR_DENIED:
2069 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
2070 return 0;
be76b5b6 2071 }
1da177e4
LT		 2072 return err;
2073}
2074
24311f88
TM		 2075int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
2076 struct nfs4_state *state, const nfs4_stateid *stateid,
2077 fmode_t type)
db4f2e63
TM		 2078{
2079 struct nfs_server *server = NFS_SERVER(state->inode);
2080 struct nfs4_opendata *opendata;
24311f88 2081 int err = 0;
db4f2e63
TM		 2082
2083 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2084 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
2085 if (IS_ERR(opendata))
2086 return PTR_ERR(opendata);
2087 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
5e99b532
JL		 2088 write_seqlock(&state->seqlock);
2089 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2090 write_sequnlock(&state->seqlock);
24311f88
TM		 2091 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2092 switch (type & (FMODE_READ|FMODE_WRITE)) {
2093 case FMODE_READ|FMODE_WRITE:
2094 case FMODE_WRITE:
2095 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
2096 if (err)
2097 break;
2098 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
2099 if (err)
2100 break;
2101 case FMODE_READ:
2102 err = nfs4_open_recover_helper(opendata, FMODE_READ);
2103 }
db4f2e63
TM		 2104 nfs4_opendata_put(opendata);
2105 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
2106}
2107
be05c860
CL		 2108static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
2109{
2110 struct nfs4_opendata *data = calldata;
2111
7981c8a6
AS		 2112 nfs4_setup_sequence(data->o_arg.server->nfs_client,
2113 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 2114}
2115
cdd4e68b
TM		 2116static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
2117{
2118 struct nfs4_opendata *data = calldata;
2119
17ead6c8 2120 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 2121
cdd4e68b 2122 data->rpc_status = task->tk_status;
26e976a8 2123 if (data->rpc_status == 0) {
f597c537 2124 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 2125 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 2126 renew_lease(data->o_res.server, data->timestamp);
a7a3b1e9 2127 data->rpc_done = true;
26e976a8 2128 }
cdd4e68b
TM		 2129}
2130
2131static void nfs4_open_confirm_release(void *calldata)
2132{
2133 struct nfs4_opendata *data = calldata;
2134 struct nfs4_state *state = NULL;
2135
2136 /* If this request hasn't been cancelled, do nothing */
a7a3b1e9 2137 if (!data->cancelled)
cdd4e68b
TM		 2138 goto out_free;
2139 /* In case of error, no cleanup! */
3e309914 2140 if (!data->rpc_done)
cdd4e68b 2141 goto out_free;
cdd4e68b 2142 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2143 if (!IS_ERR(state))
643168c2 2144 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 2145out_free:
c6d00e63 2146 nfs4_opendata_put(data);
cdd4e68b
TM		 2147}
2148
2149static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 2150 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 2151 .rpc_call_done = nfs4_open_confirm_done,
2152 .rpc_release = nfs4_open_confirm_release,
2153};
2154
2155/*
2156 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
2157 */
2158static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
2159{
2b0143b5 2160 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 2161 struct rpc_task *task;
5138fde0
TM		 2162 struct rpc_message msg = {
2163 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
2164 .rpc_argp = &data->c_arg,
2165 .rpc_resp = &data->c_res,
2166 .rpc_cred = data->owner->so_cred,
2167 };
c970aa85
TM		 2168 struct rpc_task_setup task_setup_data = {
2169 .rpc_client = server->client,
5138fde0 2170 .rpc_message = &msg,
c970aa85
TM		 2171 .callback_ops = &nfs4_open_confirm_ops,
2172 .callback_data = data,
101070ca 2173 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2174 .flags = RPC_TASK_ASYNC,
2175 };
1da177e4
LT		 2176 int status;
2177
17ead6c8 2178 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 2179 kref_get(&data->kref);
a7a3b1e9 2180 data->rpc_done = false;
3e309914 2181 data->rpc_status = 0;
5138fde0 2182 data->timestamp = jiffies;
e92c1e0d
BC		 2183 if (data->is_recover)
2184 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
c970aa85 2185 task = rpc_run_task(&task_setup_data);
7a1218a2 2186 if (IS_ERR(task))
cdd4e68b 2187 return PTR_ERR(task);
820bf85c 2188 status = rpc_wait_for_completion_task(task);
cdd4e68b 2189 if (status != 0) {
a7a3b1e9 2190 data->cancelled = true;
cdd4e68b
TM		 2191 smp_wmb();
2192 } else
2193 status = data->rpc_status;
e6b3c4db 2194 rpc_put_task(task);
1da177e4
LT		 2195 return status;
2196}
2197
24ac23ab 2198static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 2199{
24ac23ab
TM		 2200 struct nfs4_opendata *data = calldata;
2201 struct nfs4_state_owner *sp = data->owner;
549b19cc 2202 struct nfs_client *clp = sp->so_server->nfs_client;
2a606188 2203 enum open_claim_type4 claim = data->o_arg.claim;
5138fde0 2204
24ac23ab 2205 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 2206 goto out_wait;
aac00a8d
TM		 2207 /*
2208 * Check if we still need to send an OPEN call, or if we can use
2209 * a delegation instead.
2210 */
2211 if (data->state != NULL) {
2212 struct nfs_delegation *delegation;
2213
dc0b027d 2214 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 2215 goto out_no_action;
aac00a8d
TM		 2216 rcu_read_lock();
2217 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2a606188 2218 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
652f89f6 2219 goto unlock_no_action;
aac00a8d
TM		 2220 rcu_read_unlock();
2221 }
95b72eb0 2222 /* Update client id. */
549b19cc 2223 data->o_arg.clientid = clp->cl_clientid;
2a606188
TM		 2224 switch (claim) {
2225 default:
2226 break;
8188df17
TM		 2227 case NFS4_OPEN_CLAIM_PREVIOUS:
2228 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2229 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 2230 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 2231 case NFS4_OPEN_CLAIM_FH:
2232 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5 2233 }
26e976a8 2234 data->timestamp = jiffies;
42e1cca7 2235 if (nfs4_setup_sequence(data->o_arg.server->nfs_client,
d898528c 2236 &data->o_arg.seq_args,
2240a9e2
TM		 2237 &data->o_res.seq_res,
2238 task) != 0)
2239 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 2240
2241 /* Set the create mode (note dependency on the session type) */
2242 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2243 if (data->o_arg.open_flags & O_EXCL) {
2244 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2245 if (nfs4_has_persistent_session(clp))
2246 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2247 else if (clp->cl_mvops->minor_version > 0)
2248 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2249 }
6ee41268 2250 return;
652f89f6 2251unlock_no_action:
9759b0fb 2252 trace_nfs4_cached_open(data->state);
652f89f6 2253 rcu_read_unlock();
6ee41268
TM		 2254out_no_action:
2255 task->tk_action = NULL;
c8da19b9 2256out_wait:
b75ad4cd 2257 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 2258}
2259
24ac23ab
TM		 2260static void nfs4_open_done(struct rpc_task *task, void *calldata)
2261{
2262 struct nfs4_opendata *data = calldata;
1da177e4 2263
24ac23ab 2264 data->rpc_status = task->tk_status;
d898528c 2265
2e80dbe7 2266 if (!nfs4_sequence_process(task, &data->o_res.seq_res))
14516c3a 2267 return;
d898528c 2268
24ac23ab 2269 if (task->tk_status == 0) {
807d66d8
TM		 2270 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2271 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 2272 case S_IFREG:
2273 break;
2274 case S_IFLNK:
24ac23ab 2275 data->rpc_status = -ELOOP;
6f926b5b
TM		 2276 break;
2277 case S_IFDIR:
24ac23ab 2278 data->rpc_status = -EISDIR;
6f926b5b
TM		 2279 break;
2280 default:
24ac23ab 2281 data->rpc_status = -ENOTDIR;
807d66d8 2282 }
6f926b5b 2283 }
26e976a8 2284 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 2285 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2286 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 2287 }
a7a3b1e9 2288 data->rpc_done = true;
24ac23ab 2289}
6f926b5b 2290
24ac23ab
TM		 2291static void nfs4_open_release(void *calldata)
2292{
2293 struct nfs4_opendata *data = calldata;
2294 struct nfs4_state *state = NULL;
2295
2296 /* If this request hasn't been cancelled, do nothing */
a7a3b1e9 2297 if (!data->cancelled)
24ac23ab
TM		 2298 goto out_free;
2299 /* In case of error, no cleanup! */
3e309914 2300 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 2301 goto out_free;
2302 /* In case we need an open_confirm, no cleanup! */
2303 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2304 goto out_free;
24ac23ab 2305 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2306 if (!IS_ERR(state))
643168c2 2307 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 2308out_free:
c6d00e63 2309 nfs4_opendata_put(data);
24ac23ab
TM		 2310}
2311
2312static const struct rpc_call_ops nfs4_open_ops = {
2313 .rpc_call_prepare = nfs4_open_prepare,
2314 .rpc_call_done = nfs4_open_done,
2315 .rpc_release = nfs4_open_release,
2316};
2317
b257957e 2318static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab 2319{
2b0143b5 2320 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 2321 struct nfs_server *server = NFS_SERVER(dir);
2322 struct nfs_openargs *o_arg = &data->o_arg;
2323 struct nfs_openres *o_res = &data->o_res;
2324 struct rpc_task *task;
5138fde0
TM		 2325 struct rpc_message msg = {
2326 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2327 .rpc_argp = o_arg,
2328 .rpc_resp = o_res,
2329 .rpc_cred = data->owner->so_cred,
2330 };
c970aa85
TM		 2331 struct rpc_task_setup task_setup_data = {
2332 .rpc_client = server->client,
5138fde0 2333 .rpc_message = &msg,
c970aa85
TM		 2334 .callback_ops = &nfs4_open_ops,
2335 .callback_data = data,
101070ca 2336 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2337 .flags = RPC_TASK_ASYNC,
2338 };
24ac23ab
TM		 2339 int status;
2340
a9c92d6b 2341 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 2342 kref_get(&data->kref);
a7a3b1e9 2343 data->rpc_done = false;
3e309914 2344 data->rpc_status = 0;
a7a3b1e9
BC		 2345 data->cancelled = false;
2346 data->is_recover = false;
bdeca1b7 2347 if (isrecover) {
8fe72bac 2348 nfs4_set_sequence_privileged(&o_arg->seq_args);
a7a3b1e9 2349 data->is_recover = true;
bdeca1b7 2350 }
c970aa85 2351 task = rpc_run_task(&task_setup_data);
d9b67e1e
AS		 2352 if (IS_ERR(task))
2353 return PTR_ERR(task);
820bf85c 2354 status = rpc_wait_for_completion_task(task);
d9b67e1e 2355 if (status != 0) {
a7a3b1e9 2356 data->cancelled = true;
d9b67e1e
AS		 2357 smp_wmb();
2358 } else
2359 status = data->rpc_status;
2360 rpc_put_task(task);
b257957e
AB		 2361
2362 return status;
2363}
2364
2365static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2366{
2b0143b5 2367 struct inode *dir = d_inode(data->dir);
b257957e 2368 struct nfs_openres *o_res = &data->o_res;
d9b67e1e 2369 int status;
b257957e
AB		 2370
2371 status = nfs4_run_open_task(data, 1);
2372 if (status != 0 || !data->rpc_done)
2373 return status;
2374
6926afd1
TM		 2375 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2376
d7e98258 2377 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM)
b257957e 2378 status = _nfs4_proc_open_confirm(data);
b257957e
AB		 2379
2380 return status;
2381}
2382
f3792d63
TM		 2383/*
2384 * Additional permission checks in order to distinguish between an
2385 * open for read, and an open for execute. This works around the
2386 * fact that NFSv4 OPEN treats read and execute permissions as being
2387 * the same.
2388 * Note that in the non-execute case, we want to turn off permission
2389 * checking if we just created a new file (POSIX open() semantics).
2390 */
6168f62c
WAA		 2391static int nfs4_opendata_access(struct rpc_cred *cred,
2392 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2393 struct nfs4_state *state, fmode_t fmode,
2394 int openflags)
6168f62c
WAA		 2395{
2396 struct nfs_access_entry cache;
1e6f2095 2397 u32 mask, flags;
6168f62c
WAA		 2398
2399 /* access call failed or for some reason the server doesn't
2400 * support any access modes -- defer access call until later */
2401 if (opendata->o_res.access_supported == 0)
2402 return 0;
2403
2404 mask = 0;
f3792d63
TM		 2405 /*
2406 * Use openflags to check for exec, because fmode won't
2407 * always have FMODE_EXEC set when file open for exec.
2408 */
f8d9a897
WAA		 2409 if (openflags & __FMODE_EXEC) {
2410 /* ONLY check for exec rights */
1e6f2095
AS		 2411 if (S_ISDIR(state->inode->i_mode))
2412 mask = NFS4_ACCESS_LOOKUP;
2413 else
2414 mask = NFS4_ACCESS_EXECUTE;
f3792d63 2415 } else if ((fmode & FMODE_READ) && !opendata->file_created)
1e6f2095 2416 mask = NFS4_ACCESS_READ;
6168f62c
WAA		 2417
2418 cache.cred = cred;
6168f62c
WAA		 2419 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2420 nfs_access_add_cache(state->inode, &cache);
2421
1e6f2095
AS		 2422 flags = NFS4_ACCESS_READ | NFS4_ACCESS_EXECUTE | NFS4_ACCESS_LOOKUP;
2423 if ((mask & ~cache.mask & flags) == 0)
6168f62c
WAA		 2424 return 0;
2425
998f40b5 2426 return -EACCES;
6168f62c
WAA		 2427}
2428
b257957e
AB		 2429/*
2430 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2431 */
2432static int _nfs4_proc_open(struct nfs4_opendata *data)
2433{
2b0143b5 2434 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2435 struct nfs_server *server = NFS_SERVER(dir);
2436 struct nfs_openargs *o_arg = &data->o_arg;
2437 struct nfs_openres *o_res = &data->o_res;
2438 int status;
2439
2440 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2441 if (!data->rpc_done)
2442 return status;
2443 if (status != 0) {
2444 if (status == -NFS4ERR_BADNAME &&
2445 !(o_arg->open_flags & O_CREAT))
2446 return -ENOENT;
24ac23ab 2447 return status;
08ef7bd3 2448 }
24ac23ab 2449
6926afd1
TM		 2450 nfs_fattr_map_and_free_names(server, &data->f_attr);
2451
5bc2afc2 2452 if (o_arg->open_flags & O_CREAT) {
5bc2afc2 2453 if (o_arg->open_flags & O_EXCL)
a7a3b1e9 2454 data->file_created = true;
5bc2afc2 2455 else if (o_res->cinfo.before != o_res->cinfo.after)
a7a3b1e9 2456 data->file_created = true;
2dfc6173 2457 if (data->file_created || dir->i_version != o_res->cinfo.after)
d3129ef6
TM		 2458 update_changeattr(dir, &o_res->cinfo,
2459 o_res->f_attr->time_start);
5bc2afc2 2460 }
0df5dd4a
TM		 2461 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2462 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2463 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2464 status = _nfs4_proc_open_confirm(data);
1da177e4 2465 if (status != 0)
24ac23ab 2466 return status;
1da177e4 2467 }
56e0d71e
TM		 2468 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR)) {
2469 nfs4_sequence_free_slot(&o_res->seq_res);
8935ef66 2470 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
56e0d71e 2471 }
24ac23ab 2472 return 0;
1da177e4
LT		 2473}
2474
1da177e4
LT		 2475/*
2476 * OPEN_EXPIRED:
2477 * reclaim state on the server after a network partition.
2478 * Assumes caller holds the appropriate lock
2479 */
539cd03a 2480static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2481{
e56e0b78 2482 struct nfs4_opendata *opendata;
864472e9 2483 int ret;
1da177e4 2484
4a1c0893 2485 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2486 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2487 if (IS_ERR(opendata))
2488 return PTR_ERR(opendata);
864472e9 2489 ret = nfs4_open_recover(opendata, state);
35d05778 2490 if (ret == -ESTALE)
3d4ff43d 2491 d_drop(ctx->dentry);
c6d00e63 2492 nfs4_opendata_put(opendata);
864472e9 2493 return ret;
1da177e4
LT		 2494}
2495
a9ed2e25 2496static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2497{
539cd03a 2498 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2499 struct nfs4_exception exception = { };
2500 int err;
2501
2502 do {
539cd03a 2503 err = _nfs4_open_expired(ctx, state);
42113a75 2504 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2505 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2506 continue;
a9ed2e25
TM		 2507 switch (err) {
2508 default:
2509 goto out;
2510 case -NFS4ERR_GRACE:
2511 case -NFS4ERR_DELAY:
2512 nfs4_handle_exception(server, err, &exception);
2513 err = 0;
2514 }
202b50dc 2515 } while (exception.retry);
a9ed2e25 2516out:
202b50dc
TM		 2517 return err;
2518}
2519
1da177e4
LT		 2520static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2521{
1da177e4 2522 struct nfs_open_context *ctx;
864472e9 2523 int ret;
1da177e4 2524
864472e9
TM		 2525 ctx = nfs4_state_find_open_context(state);
2526 if (IS_ERR(ctx))
91876b13 2527 return -EAGAIN;
539cd03a 2528 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2529 put_nfs_open_context(ctx);
2530 return ret;
1da177e4
LT		 2531}
2532
41020b67
TM		 2533static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
2534 const nfs4_stateid *stateid)
4dfd4f7a 2535{
41020b67 2536 nfs_remove_bad_delegation(state->inode, stateid);
4dfd4f7a
TM		 2537 write_seqlock(&state->seqlock);
2538 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2539 write_sequnlock(&state->seqlock);
2540 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2541}
2542
2543static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2544{
2545 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
41020b67 2546 nfs_finish_clear_delegation_stateid(state, NULL);
4dfd4f7a
TM		 2547}
2548
2549static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2550{
2551 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2552 nfs40_clear_delegation_stateid(state);
2553 return nfs4_open_expired(sp, state);
2554}
2555
45870d69
TM		 2556static int nfs40_test_and_free_expired_stateid(struct nfs_server *server,
2557 nfs4_stateid *stateid,
2558 struct rpc_cred *cred)
2559{
2560 return -NFS4ERR_BAD_STATEID;
2561}
2562
f062eb6c 2563#if defined(CONFIG_NFS_V4_1)
4586f6e2
TM		 2564static int nfs41_test_and_free_expired_stateid(struct nfs_server *server,
2565 nfs4_stateid *stateid,
2566 struct rpc_cred *cred)
2567{
2568 int status;
2569
f7a62ada
TM		 2570 switch (stateid->type) {
2571 default:
2572 break;
2573 case NFS4_INVALID_STATEID_TYPE:
2574 case NFS4_SPECIAL_STATEID_TYPE:
2575 return -NFS4ERR_BAD_STATEID;
2576 case NFS4_REVOKED_STATEID_TYPE:
2577 goto out_free;
2578 }
4586f6e2 2579
f7a62ada 2580 status = nfs41_test_stateid(server, stateid, cred);
4586f6e2
TM		 2581 switch (status) {
2582 case -NFS4ERR_EXPIRED:
2583 case -NFS4ERR_ADMIN_REVOKED:
2584 case -NFS4ERR_DELEG_REVOKED:
f7a62ada
TM		 2585 break;
2586 default:
4586f6e2
TM		 2587 return status;
2588 }
f7a62ada
TM		 2589out_free:
2590 /* Ack the revoked state to the server */
f0b0bf88 2591 nfs41_free_stateid(server, stateid, cred, true);
f7a62ada 2592 return -NFS4ERR_EXPIRED;
4586f6e2
TM		 2593}
2594
0c116cad 2595static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2596{
f062eb6c 2597 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2598 nfs4_stateid stateid;
ab7cb0df 2599 struct nfs_delegation *delegation;
0c116cad
TM		 2600 struct rpc_cred *cred;
2601 int status;
3e60ffdd 2602
ab7cb0df
TM		 2603 /* Get the delegation credential for use by test/free_stateid */
2604 rcu_read_lock();
2605 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2606 if (delegation == NULL) {
ab7cb0df 2607 rcu_read_unlock();
0c116cad
TM		 2608 return;
2609 }
2610
2611 nfs4_stateid_copy(&stateid, &delegation->stateid);
0e3d3e5d
OK		 2612 if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags) ||
2613 !test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED,
2614 &delegation->flags)) {
4c8e5447 2615 rcu_read_unlock();
41020b67 2616 nfs_finish_clear_delegation_stateid(state, &stateid);
4c8e5447
TM		 2617 return;
2618 }
0c116cad 2619
0c116cad
TM		 2620 cred = get_rpccred(delegation->cred);
2621 rcu_read_unlock();
4586f6e2 2622 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
0c116cad 2623 trace_nfs4_test_delegation_stateid(state, NULL, status);
f7a62ada 2624 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID)
41020b67 2625 nfs_finish_clear_delegation_stateid(state, &stateid);
ab7cb0df 2626
0c116cad 2627 put_rpccred(cred);
3e60ffdd
CL		 2628}
2629
c5896fc8
TM		 2630/**
2631 * nfs41_check_expired_locks - possibly free a lock stateid
2632 *
2633 * @state: NFSv4 state for an inode
2634 *
2635 * Returns NFS_OK if recovery for this stateid is now finished.
2636 * Otherwise a negative NFS4ERR value is returned.
2637 */
2638static int nfs41_check_expired_locks(struct nfs4_state *state)
2639{
2640 int status, ret = NFS_OK;
d75a6a0e 2641 struct nfs4_lock_state *lsp, *prev = NULL;
c5896fc8
TM		 2642 struct nfs_server *server = NFS_SERVER(state->inode);
2643
2644 if (!test_bit(LK_STATE_IN_USE, &state->flags))
2645 goto out;
d75a6a0e
BC		 2646
2647 spin_lock(&state->state_lock);
c5896fc8
TM		 2648 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
2649 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
2650 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
2651
194bc1f4 2652 refcount_inc(&lsp->ls_count);
d75a6a0e
BC		 2653 spin_unlock(&state->state_lock);
2654
2655 nfs4_put_lock_state(prev);
2656 prev = lsp;
2657
c5896fc8
TM		 2658 status = nfs41_test_and_free_expired_stateid(server,
2659 &lsp->ls_stateid,
2660 cred);
2661 trace_nfs4_test_lock_stateid(state, lsp, status);
2662 if (status == -NFS4ERR_EXPIRED ||
2663 status == -NFS4ERR_BAD_STATEID) {
2664 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
67dd4830 2665 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE;
c5896fc8
TM		 2666 if (!recover_lost_locks)
2667 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2668 } else if (status != NFS_OK) {
2669 ret = status;
d75a6a0e
BC		 2670 nfs4_put_lock_state(prev);
2671 goto out;
c5896fc8 2672 }
d75a6a0e 2673 spin_lock(&state->state_lock);
c5896fc8 2674 }
d75a6a0e
BC		 2675 }
2676 spin_unlock(&state->state_lock);
2677 nfs4_put_lock_state(prev);
c5896fc8
TM		 2678out:
2679 return ret;
2680}
2681
3e60ffdd
CL		 2682/**
2683 * nfs41_check_open_stateid - possibly free an open stateid
2684 *
2685 * @state: NFSv4 state for an inode
2686 *
2687 * Returns NFS_OK if recovery for this stateid is now finished.
2688 * Otherwise a negative NFS4ERR value is returned.
2689 */
2690static int nfs41_check_open_stateid(struct nfs4_state *state)
2691{
2692 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2693 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2694 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2695 int status;
2696
b134fc4a 2697 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) {
8a64c4ef
TM		 2698 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) {
2699 if (nfs4_have_delegation(state->inode, state->state))
2700 return NFS_OK;
2701 return -NFS4ERR_OPENMODE;
2702 }
3e60ffdd 2703 return -NFS4ERR_BAD_STATEID;
b134fc4a 2704 }
4586f6e2 2705 status = nfs41_test_and_free_expired_stateid(server, stateid, cred);
08cb47fa 2706 trace_nfs4_test_open_stateid(state, NULL, status);
f7a62ada 2707 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) {
3e60ffdd
CL		 2708 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2709 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2710 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2711 clear_bit(NFS_OPEN_STATE, &state->flags);
67dd4830 2712 stateid->type = NFS4_INVALID_STATEID_TYPE;
8a64c4ef 2713 return status;
c0ca0e59 2714 }
8a64c4ef
TM		 2715 if (nfs_open_stateid_recover_openmode(state))
2716 return -NFS4ERR_OPENMODE;
2717 return NFS_OK;
b01dd1d8
BS		 2718}
2719
2720static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2721{
eb64cf96 2722 int status;
b01dd1d8 2723
0c116cad 2724 nfs41_check_delegation_stateid(state);
c5896fc8
TM		 2725 status = nfs41_check_expired_locks(state);
2726 if (status != NFS_OK)
2727 return status;
3e60ffdd 2728 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2729 if (status != NFS_OK)
2730 status = nfs4_open_expired(sp, state);
2731 return status;
f062eb6c
BS		 2732}
2733#endif
2734
aa53ed54
JL		 2735/*
2736 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2737 * fields corresponding to attributes that were used to store the verifier.
2738 * Make sure we clobber those fields in the later setattr call
2739 */
5334c5bd
KM		 2740static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2741 struct iattr *sattr, struct nfs4_label **label)
aa53ed54 2742{
5334c5bd
KM		 2743 const u32 *attrset = opendata->o_res.attrset;
2744
2745 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
aa53ed54
JL		 2746 !(sattr->ia_valid & ATTR_ATIME_SET))
2747 sattr->ia_valid |= ATTR_ATIME;
2748
5334c5bd 2749 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
aa53ed54
JL		 2750 !(sattr->ia_valid & ATTR_MTIME_SET))
2751 sattr->ia_valid |= ATTR_MTIME;
5334c5bd
KM		 2752
2753 /* Except MODE, it seems harmless of setting twice. */
a430607b 2754 if (opendata->o_arg.createmode != NFS4_CREATE_EXCLUSIVE &&
501e7a46
BC		 2755 (attrset[1] & FATTR4_WORD1_MODE ||
2756 attrset[2] & FATTR4_WORD2_MODE_UMASK))
5334c5bd
KM		 2757 sattr->ia_valid &= ~ATTR_MODE;
2758
2759 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2760 *label = NULL;
aa53ed54
JL		 2761}
2762
c21443c2
TM		 2763static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2764 fmode_t fmode,
2765 int flags,
3efb9722 2766 struct nfs_open_context *ctx)
c21443c2
TM		 2767{
2768 struct nfs4_state_owner *sp = opendata->owner;
2769 struct nfs_server *server = sp->so_server;
275bb307 2770 struct dentry *dentry;
c21443c2
TM		 2771 struct nfs4_state *state;
2772 unsigned int seq;
2773 int ret;
2774
2775 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2776
2777 ret = _nfs4_proc_open(opendata);
dca78001 2778 if (ret != 0)
c21443c2
TM		 2779 goto out;
2780
2781 state = nfs4_opendata_to_nfs4_state(opendata);
2782 ret = PTR_ERR(state);
2783 if (IS_ERR(state))
2784 goto out;
a974deee 2785 ctx->state = state;
c21443c2
TM		 2786 if (server->caps & NFS_CAP_POSIX_LOCK)
2787 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
a8ce377a
JL		 2788 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
2789 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
c21443c2 2790
275bb307 2791 dentry = opendata->dentry;
2b0143b5 2792 if (d_really_is_negative(dentry)) {
668d0cd5 2793 struct dentry *alias;
275bb307 2794 d_drop(dentry);
668d0cd5
AV		 2795 alias = d_exact_alias(dentry, state->inode);
2796 if (!alias)
2797 alias = d_splice_alias(igrab(state->inode), dentry);
2798 /* d_splice_alias() can't fail here - it's a non-directory */
2799 if (alias) {
275bb307 2800 dput(ctx->dentry);
668d0cd5 2801 ctx->dentry = dentry = alias;
275bb307
TM		 2802 }
2803 nfs_set_verifier(dentry,
2b0143b5 2804 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2805 }
2806
c21443c2
TM		 2807 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2808 if (ret != 0)
2809 goto out;
2810
2b0143b5 2811 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2812 nfs_inode_attach_open_context(ctx);
2813 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2814 nfs4_schedule_stateid_recovery(server, state);
2815 }
c21443c2
TM		 2816out:
2817 return ret;
2818}
2819
1da177e4 2820/*
24ac23ab 2821 * Returns a referenced nfs4_state
1da177e4 2822 */
82be417a 2823static int _nfs4_do_open(struct inode *dir,
4197a055 2824 struct nfs_open_context *ctx,
82be417a 2825 int flags,
8fd1ab74 2826 const struct nfs4_open_createattrs *c,
5bc2afc2 2827 int *opened)
1da177e4
LT		 2828{
2829 struct nfs4_state_owner *sp;
2830 struct nfs4_state *state = NULL;
2831 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2832 struct nfs4_opendata *opendata;
4197a055
TM		 2833 struct dentry *dentry = ctx->dentry;
2834 struct rpc_cred *cred = ctx->cred;
2835 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2836 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2837 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
8fd1ab74
TM		 2838 struct iattr *sattr = c->sattr;
2839 struct nfs4_label *label = c->label;
1775fd3e 2840 struct nfs4_label *olabel = NULL;
aac00a8d 2841 int status;
1da177e4
LT		 2842
2843 /* Protect against reboot recovery conflicts */
1da177e4 2844 status = -ENOMEM;
d1e284d5
TM		 2845 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2846 if (sp == NULL) {
1da177e4
LT		 2847 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2848 goto out_err;
2849 }
334f87dd 2850 status = nfs4_client_recover_expired_lease(server->nfs_client);
58d9714a 2851 if (status != 0)
b4454fe1 2852 goto err_put_state_owner;
2b0143b5
DH		 2853 if (d_really_is_positive(dentry))
2854 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2855 status = -ENOMEM;
2b0143b5 2856 if (d_really_is_positive(dentry))
49f9a0fa 2857 claim = NFS4_OPEN_CLAIM_FH;
8fd1ab74
TM		 2858 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags,
2859 c, claim, GFP_KERNEL);
e56e0b78 2860 if (opendata == NULL)
95d35cb4 2861 goto err_put_state_owner;
1da177e4 2862
14c43f76
DQ		 2863 if (label) {
2864 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2865 if (IS_ERR(olabel)) {
2866 status = PTR_ERR(olabel);
2867 goto err_opendata_put;
2868 }
2869 }
2870
e911b815
TM		 2871 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2872 if (!opendata->f_attr.mdsthreshold) {
2873 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2874 if (!opendata->f_attr.mdsthreshold)
2875 goto err_free_label;
2876 }
1549210f 2877 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2878 }
2b0143b5
DH		 2879 if (d_really_is_positive(dentry))
2880 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2881
3efb9722 2882 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2883 if (status != 0)
14c43f76 2884 goto err_free_label;
3efb9722 2885 state = ctx->state;
6168f62c 2886
efcbc04e 2887 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 2888 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
5334c5bd 2889 nfs4_exclusive_attrset(opendata, sattr, &label);
a1d1c4f1
TM		 2890 /*
2891 * send create attributes which was not set by open
2892 * with an extra setattr.
2893 */
2894 if (sattr->ia_valid & NFS4_VALID_ATTRS) {
2895 nfs_fattr_init(opendata->o_res.f_attr);
2896 status = nfs4_do_setattr(state->inode, cred,
2897 opendata->o_res.f_attr, sattr,
29b59f94 2898 ctx, label, olabel);
a1d1c4f1
TM		 2899 if (status == 0) {
2900 nfs_setattr_update_inode(state->inode, sattr,
2901 opendata->o_res.f_attr);
2902 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2903 }
1775fd3e 2904 }
0ab64e0e 2905 }
c5c3fb5f 2906 if (opened && opendata->file_created)
5bc2afc2 2907 *opened |= FILE_CREATED;
82be417a 2908
e911b815 2909 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2910 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2911 opendata->f_attr.mdsthreshold = NULL;
2912 }
82be417a 2913
14c43f76
DQ		 2914 nfs4_label_free(olabel);
2915
c6d00e63 2916 nfs4_opendata_put(opendata);
1da177e4 2917 nfs4_put_state_owner(sp);
1da177e4 2918 return 0;
14c43f76
DQ		 2919err_free_label:
2920 nfs4_label_free(olabel);
c6d00e63
TM		 2921err_opendata_put:
2922 nfs4_opendata_put(opendata);
e56e0b78
TM		 2923err_put_state_owner:
2924 nfs4_put_state_owner(sp);
1da177e4 2925out_err:
1da177e4
LT		 2926 return status;
2927}
2928
2929
82be417a 2930static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2931 struct nfs_open_context *ctx,
82be417a
AA		 2932 int flags,
2933 struct iattr *sattr,
5bc2afc2
TM		 2934 struct nfs4_label *label,
2935 int *opened)
1da177e4 2936{
49f9a0fa 2937 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2938 struct nfs4_exception exception = { };
2939 struct nfs4_state *res;
8fd1ab74
TM		 2940 struct nfs4_open_createattrs c = {
2941 .label = label,
2942 .sattr = sattr,
2943 .verf = {
2944 [0] = (__u32)jiffies,
2945 [1] = (__u32)current->pid,
2946 },
2947 };
1da177e4
LT		 2948 int status;
2949
2950 do {
8fd1ab74 2951 status = _nfs4_do_open(dir, ctx, flags, &c, opened);
3efb9722 2952 res = ctx->state;
42113a75 2953 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2954 if (status == 0)
2955 break;
2956 /* NOTE: BAD_SEQID means the server and client disagree about the
2957 * book-keeping w.r.t. state-changing operations
2958 * (OPEN/CLOSE/LOCK/LOCKU...)
2959 * It is actually a sign of a bug on the client or on the server.
2960 *
2961 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2962 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2963 * have unhashed the old state_owner for us, and that we can
2964 * therefore safely retry using a new one. We should still warn
2965 * the user though...
2966 */
2967 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2968 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2969 " returned a bad sequence-id error!\n",
2970 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2971 exception.retry = 1;
2972 continue;
2973 }
550f5747
TM		 2974 /*
2975 * BAD_STATEID on OPEN means that the server cancelled our
2976 * state before it received the OPEN_CONFIRM.
2977 * Recover by retrying the request as per the discussion
2978 * on Page 181 of RFC3530.
2979 */
2980 if (status == -NFS4ERR_BAD_STATEID) {
2981 exception.retry = 1;
2982 continue;
2983 }
aac00a8d
TM		 2984 if (status == -EAGAIN) {
2985 /* We must have found a delegation */
2986 exception.retry = 1;
2987 continue;
2988 }
49f9a0fa
TM		 2989 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2990 continue;
2991 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2992 status, &exception));
2993 } while (exception.retry);
2994 return res;
2995}
2996
8487c479
TM		 2997static int _nfs4_do_setattr(struct inode *inode,
2998 struct nfs_setattrargs *arg,
2999 struct nfs_setattrres *res,
3000 struct rpc_cred *cred,
29b59f94 3001 struct nfs_open_context *ctx)
1da177e4 3002{
3e4f6290 3003 struct nfs_server *server = NFS_SERVER(inode);
d9b67e1e 3004 struct rpc_message msg = {
659bfcd6 3005 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
8487c479
TM		 3006 .rpc_argp = arg,
3007 .rpc_resp = res,
659bfcd6 3008 .rpc_cred = cred,
d9b67e1e 3009 };
abf4e13c 3010 struct rpc_cred *delegation_cred = NULL;
26e976a8 3011 unsigned long timestamp = jiffies;
ee3ae84e
TM		 3012 fmode_t fmode;
3013 bool truncate;
65e4308d 3014 int status;
1da177e4 3015
8487c479 3016 nfs_fattr_init(res->fattr);
1da177e4 3017
ee3ae84e 3018 /* Servers should only apply open mode checks for file size changes */
8487c479 3019 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
ee3ae84e
TM		 3020 fmode = truncate ? FMODE_WRITE : FMODE_READ;
3021
8487c479 3022 if (nfs4_copy_delegation_stateid(inode, fmode, &arg->stateid, &delegation_cred)) {
ee3ae84e 3023 /* Use that stateid */
29b59f94 3024 } else if (truncate && ctx != NULL) {
17393475 3025 struct nfs_lock_context *l_ctx;
29b59f94 3026 if (!nfs4_valid_open_stateid(ctx->state))
0418dae1 3027 return -EBADF;
17393475
N		 3028 l_ctx = nfs_get_lock_context(ctx);
3029 if (IS_ERR(l_ctx))
3030 return PTR_ERR(l_ctx);
7a0566b3
N		 3031 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx,
3032 &arg->stateid, &delegation_cred);
3033 nfs_put_lock_context(l_ctx);
3034 if (status == -EIO)
0418dae1 3035 return -EBADF;
08e9eac4 3036 } else
8487c479 3037 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
abf4e13c
TM		 3038 if (delegation_cred)
3039 msg.rpc_cred = delegation_cred;
1da177e4 3040
8487c479 3041 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
abf4e13c
TM		 3042
3043 put_rpccred(delegation_cred);
29b59f94 3044 if (status == 0 && ctx != NULL)
26e976a8 3045 renew_lease(server, timestamp);
8487c479 3046 trace_nfs4_setattr(inode, &arg->stateid, status);
65e4308d 3047 return status;
1da177e4
LT		 3048}
3049
659bfcd6
TM		 3050static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
3051 struct nfs_fattr *fattr, struct iattr *sattr,
29b59f94 3052 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
1775fd3e 3053 struct nfs4_label *olabel)
1da177e4 3054{
3e4f6290 3055 struct nfs_server *server = NFS_SERVER(inode);
29b59f94 3056 struct nfs4_state *state = ctx ? ctx->state : NULL;
d9b67e1e
AS		 3057 struct nfs_setattrargs arg = {
3058 .fh = NFS_FH(inode),
3059 .iap = sattr,
8487c479
TM		 3060 .server = server,
3061 .bitmask = server->attr_bitmask,
3062 .label = ilabel,
d9b67e1e
AS		 3063 };
3064 struct nfs_setattrres res = {
8487c479
TM		 3065 .fattr = fattr,
3066 .label = olabel,
3067 .server = server,
d9b67e1e 3068 };
a1d0b5ee
TM		 3069 struct nfs4_exception exception = {
3070 .state = state,
3114ea7a 3071 .inode = inode,
8487c479 3072 .stateid = &arg.stateid,
a1d0b5ee 3073 };
1da177e4 3074 int err;
8487c479
TM		 3075
3076 arg.bitmask = nfs4_bitmask(server, ilabel);
3077 if (ilabel)
3078 arg.bitmask = nfs4_bitmask(server, olabel);
3079
1da177e4 3080 do {
29b59f94 3081 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx);
451146be
TM		 3082 switch (err) {
3083 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 3084 if (!(sattr->ia_valid & ATTR_SIZE)) {
3085 pr_warn_once("NFSv4: server %s is incorrectly "
3086 "applying open mode checks to "
3087 "a SETATTR that is not "
3088 "changing file size.\n",
3089 server->nfs_client->cl_hostname);
3090 }
451146be
TM		 3091 if (state && !(state->state & FMODE_WRITE)) {
3092 err = -EBADF;
3093 if (sattr->ia_valid & ATTR_OPEN)
3094 err = -EACCES;
3095 goto out;
3096 }
3097 }
3098 err = nfs4_handle_exception(server, err, &exception);
1da177e4 3099 } while (exception.retry);
451146be 3100out:
1da177e4
LT		 3101 return err;
3102}
3103
500d701f
PT		 3104static bool
3105nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
3106{
3107 if (inode == NULL || !nfs_have_layout(inode))
3108 return false;
3109
3110 return pnfs_wait_on_layoutreturn(inode, task);
3111}
3112
1da177e4
LT		 3113struct nfs4_closedata {
3114 struct inode *inode;
3115 struct nfs4_state *state;
3116 struct nfs_closeargs arg;
3117 struct nfs_closeres res;
cf805165
TM		 3118 struct {
3119 struct nfs4_layoutreturn_args arg;
3120 struct nfs4_layoutreturn_res res;
4d796d75 3121 struct nfs4_xdr_opaque_data ld_private;
cf805165
TM		 3122 u32 roc_barrier;
3123 bool roc;
3124 } lr;
516a6af6 3125 struct nfs_fattr fattr;
26e976a8 3126 unsigned long timestamp;
1da177e4
LT		 3127};
3128
963d8fe5 3129static void nfs4_free_closedata(void *data)
9512135d 3130{
963d8fe5
TM		 3131 struct nfs4_closedata *calldata = data;
3132 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 3133 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 3134
cf805165 3135 if (calldata->lr.roc)
1c5bd76d
TM		 3136 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res,
3137 calldata->res.lr_ret);
9512135d
TM		 3138 nfs4_put_open_state(calldata->state);
3139 nfs_free_seqid(calldata->arg.seqid);
9512135d 3140 nfs4_put_state_owner(sp);
322b2b90 3141 nfs_sb_deactive(sb);
9512135d
TM		 3142 kfree(calldata);
3143}
3144
963d8fe5 3145static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 3146{
963d8fe5 3147 struct nfs4_closedata *calldata = data;
1da177e4 3148 struct nfs4_state *state = calldata->state;
1da177e4 3149 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 3150 nfs4_stateid *res_stateid = NULL;
b8b8d221
TM		 3151 struct nfs4_exception exception = {
3152 .state = state,
3153 .inode = calldata->inode,
3154 .stateid = &calldata->arg.stateid,
3155 };
1da177e4 3156
a3ca5651 3157 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 3158 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3159 return;
42113a75 3160 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
cf805165
TM		 3161
3162 /* Handle Layoutreturn errors */
3163 if (calldata->arg.lr_args && task->tk_status != 0) {
3164 switch (calldata->res.lr_ret) {
3165 default:
3166 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
3167 break;
3168 case 0:
3169 calldata->arg.lr_args = NULL;
3170 calldata->res.lr_res = NULL;
3171 break;
7380020e
TM		 3172 case -NFS4ERR_OLD_STATEID:
3173 if (nfs4_refresh_layout_stateid(&calldata->arg.lr_args->stateid,
91b30d2e
TM		 3174 calldata->inode))
3175 goto lr_restart;
7380020e 3176 /* Fallthrough */
cf805165
TM		 3177 case -NFS4ERR_ADMIN_REVOKED:
3178 case -NFS4ERR_DELEG_REVOKED:
3179 case -NFS4ERR_EXPIRED:
3180 case -NFS4ERR_BAD_STATEID:
cf805165
TM		 3181 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
3182 case -NFS4ERR_WRONG_CRED:
3183 calldata->arg.lr_args = NULL;
3184 calldata->res.lr_res = NULL;
91b30d2e 3185 goto lr_restart;
cf805165
TM		 3186 }
3187 }
3188
d9b67e1e 3189 /* hmm. we are done with the inode, and in the process of freeing
1da177e4
LT		 3190 * the state_owner. we keep this around to process errors
3191 */
1da177e4
LT		 3192 switch (task->tk_status) {
3193 case 0:
412f6c4c 3194 res_stateid = &calldata->res.stateid;
26e976a8 3195 renew_lease(server, calldata->timestamp);
412f6c4c 3196 break;
f07d4a31
TM		 3197 case -NFS4ERR_ACCESS:
3198 if (calldata->arg.bitmask != NULL) {
3199 calldata->arg.bitmask = NULL;
3200 calldata->res.fattr = NULL;
91b30d2e 3201 goto out_restart;
f07d4a31
TM		 3202
3203 }
3204 break;
12f275cd
TM		 3205 case -NFS4ERR_OLD_STATEID:
3206 /* Did we race with OPEN? */
3207 if (nfs4_refresh_open_stateid(&calldata->arg.stateid,
91b30d2e
TM		 3208 state))
3209 goto out_restart;
12f275cd 3210 goto out_release;
69794ad7 3211 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 3212 case -NFS4ERR_STALE_STATEID:
26d36301
TM		 3213 case -NFS4ERR_EXPIRED:
3214 nfs4_free_revoked_stateid(server,
3215 &calldata->arg.stateid,
3216 task->tk_msg.rpc_cred);
12f275cd 3217 /* Fallthrough */
9e33bed5 3218 case -NFS4ERR_BAD_STATEID:
c82bac6f 3219 break;
1da177e4 3220 default:
b8b8d221
TM		 3221 task->tk_status = nfs4_async_handle_exception(task,
3222 server, task->tk_status, &exception);
3223 if (exception.retry)
91b30d2e 3224 goto out_restart;
1da177e4 3225 }
4a1e2feb
TM		 3226 nfs_clear_open_stateid(state, &calldata->arg.stateid,
3227 res_stateid, calldata->arg.fmode);
69794ad7 3228out_release:
91b30d2e 3229 task->tk_status = 0;
72211dbe 3230 nfs_release_seqid(calldata->arg.seqid);
d8d84983 3231 nfs_refresh_inode(calldata->inode, &calldata->fattr);
a3ca5651 3232 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
91b30d2e
TM		 3233 return;
3234lr_restart:
3235 calldata->res.lr_ret = 0;
3236out_restart:
3237 task->tk_status = 0;
3238 rpc_restart_call_prepare(task);
3239 goto out_release;
1da177e4
LT		 3240}
3241
4ce70ada 3242static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 3243{
4ce70ada 3244 struct nfs4_closedata *calldata = data;
9512135d 3245 struct nfs4_state *state = calldata->state;
7fdab069 3246 struct inode *inode = calldata->inode;
aee7af35 3247 bool is_rdonly, is_wronly, is_rdwr;
88069f77 3248 int call_close = 0;
9512135d 3249
a3ca5651 3250 dprintk("%s: begin!\n", __func__);
963d8fe5 3251 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 3252 goto out_wait;
003707c7 3253
88069f77 3254 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 3255 spin_lock(&state->owner->so_lock);
aee7af35
TM		 3256 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
3257 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
3258 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
003707c7 3259 /* Calculate the change in open mode */
cd9288ff 3260 calldata->arg.fmode = 0;
e7616923 3261 if (state->n_rdwr == 0) {
cd9288ff
TM		 3262 if (state->n_rdonly == 0)
3263 call_close |= is_rdonly;
3264 else if (is_rdonly)
3265 calldata->arg.fmode |= FMODE_READ;
3266 if (state->n_wronly == 0)
3267 call_close |= is_wronly;
3268 else if (is_wronly)
3269 calldata->arg.fmode |= FMODE_WRITE;
e547f262
TM		 3270 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
3271 call_close |= is_rdwr;
cd9288ff
TM		 3272 } else if (is_rdwr)
3273 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
3274
5cc7861e 3275 if (!nfs4_valid_open_stateid(state) ||
c82bac6f 3276 !nfs4_refresh_open_stateid(&calldata->arg.stateid, state))
5d422301 3277 call_close = 0;
4cecb76f 3278 spin_unlock(&state->owner->so_lock);
88069f77
TM		 3279
3280 if (!call_close) {
963d8fe5 3281 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 3282 goto out_no_action;
9512135d 3283 }
88069f77 3284
1c5bd76d 3285 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) {
500d701f
PT		 3286 nfs_release_seqid(calldata->arg.seqid);
3287 goto out_wait;
3288 }
3289
9413a1a1 3290 if (calldata->arg.fmode == 0)
88069f77 3291 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3ecefc92 3292
9413a1a1 3293 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) {
3ecefc92
TM		 3294 /* Close-to-open cache consistency revalidation */
3295 if (!nfs4_have_delegation(inode, FMODE_READ))
3296 calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask;
3297 else
3298 calldata->arg.bitmask = NULL;
3299 }
3c13cb5b 3300
6ae37339
TM		 3301 calldata->arg.share_access =
3302 nfs4_map_atomic_open_share(NFS_SERVER(inode),
3303 calldata->arg.fmode, 0);
88069f77 3304
d8d84983
TM		 3305 if (calldata->res.fattr == NULL)
3306 calldata->arg.bitmask = NULL;
3307 else if (calldata->arg.bitmask == NULL)
3308 calldata->res.fattr = NULL;
26e976a8 3309 calldata->timestamp = jiffies;
42e1cca7 3310 if (nfs4_setup_sequence(NFS_SERVER(inode)->nfs_client,
9d12b216
TM		 3311 &calldata->arg.seq_args,
3312 &calldata->res.seq_res,
2240a9e2
TM		 3313 task) != 0)
3314 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 3315 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 3316 return;
3317out_no_action:
3318 task->tk_action = NULL;
3319out_wait:
3320 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 3321}
3322
963d8fe5 3323static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 3324 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 3325 .rpc_call_done = nfs4_close_done,
3326 .rpc_release = nfs4_free_closedata,
3327};
3328
1da177e4
LT		 3329/*
3330 * It is possible for data to be read/written from a mem-mapped file
3331 * after the sys_close call (which hits the vfs layer as a flush).
3332 * This means that we can't safely call nfsv4 close on a file until
3333 * the inode is cleared. This in turn means that we are not good
3334 * NFSv4 citizens - we do not indicate to the server to update the file's
3335 * share state even when we are done with one of the three share
3336 * stateid's in the inode.
3337 *
3338 * NOTE: Caller must be holding the sp->so_owner semaphore!
3339 */
1f7977c1 3340int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 3341{
4a35bd41 3342 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 3343 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 3344 struct nfs4_closedata *calldata;
b39e625b
TM		 3345 struct nfs4_state_owner *sp = state->owner;
3346 struct rpc_task *task;
5138fde0
TM		 3347 struct rpc_message msg = {
3348 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3349 .rpc_cred = state->owner->so_cred,
3350 };
c970aa85
TM		 3351 struct rpc_task_setup task_setup_data = {
3352 .rpc_client = server->client,
5138fde0 3353 .rpc_message = &msg,
c970aa85 3354 .callback_ops = &nfs4_close_ops,
101070ca 3355 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3356 .flags = RPC_TASK_ASYNC,
3357 };
9512135d 3358 int status = -ENOMEM;
1da177e4 3359
fa940720
WAA		 3360 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3361 &task_setup_data.rpc_client, &msg);
3362
8535b2be 3363 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 3364 if (calldata == NULL)
9512135d 3365 goto out;
a9c92d6b 3366 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 3367 calldata->inode = state->inode;
1da177e4 3368 calldata->state = state;
4a35bd41 3369 calldata->arg.fh = NFS_FH(state->inode);
c82bac6f
TM		 3370 if (!nfs4_copy_open_stateid(&calldata->arg.stateid, state))
3371 goto out_free_calldata;
1da177e4 3372 /* Serialization for the sequence id */
63f5f796
TM		 3373 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3374 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 3375 if (IS_ERR(calldata->arg.seqid))
9512135d 3376 goto out_free_calldata;
d8d84983 3377 nfs_fattr_init(&calldata->fattr);
dc0b027d 3378 calldata->arg.fmode = 0;
4d796d75 3379 calldata->lr.arg.ld_private = &calldata->lr.ld_private;
516a6af6 3380 calldata->res.fattr = &calldata->fattr;
c1d51931 3381 calldata->res.seqid = calldata->arg.seqid;
516a6af6 3382 calldata->res.server = server;
cf805165 3383 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
1c5bd76d
TM		 3384 calldata->lr.roc = pnfs_roc(state->inode,
3385 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred);
3386 if (calldata->lr.roc) {
3387 calldata->arg.lr_args = &calldata->lr.arg;
3388 calldata->res.lr_res = &calldata->lr.res;
3389 }
643168c2 3390 nfs_sb_active(calldata->inode->i_sb);
9512135d 3391
1174dd1f
TM		 3392 msg.rpc_argp = &calldata->arg;
3393 msg.rpc_resp = &calldata->res;
c970aa85
TM		 3394 task_setup_data.callback_data = calldata;
3395 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 3396 if (IS_ERR(task))
3397 return PTR_ERR(task);
a49c3c77
TM		 3398 status = 0;
3399 if (wait)
3400 status = rpc_wait_for_completion_task(task);
b39e625b 3401 rpc_put_task(task);
a49c3c77 3402 return status;
9512135d
TM		 3403out_free_calldata:
3404 kfree(calldata);
3405out:
b39e625b
TM		 3406 nfs4_put_open_state(state);
3407 nfs4_put_state_owner(sp);
9512135d 3408 return status;
1da177e4
LT		 3409}
3410
2b484297 3411static struct inode *
5bc2afc2
TM		 3412nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3413 int open_flags, struct iattr *attr, int *opened)
1da177e4 3414{
1da177e4 3415 struct nfs4_state *state;
aa9c2669
DQ		 3416 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3417
3418 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 3419
565277f6 3420 /* Protect against concurrent sillydeletes */
5bc2afc2 3421 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 3422
3423 nfs4_label_release_security(label);
3424
f46e0bd3
TM		 3425 if (IS_ERR(state))
3426 return ERR_CAST(state);
275bb307 3427 return state->inode;
1da177e4
LT		 3428}
3429
1185a552 3430static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 3431{
3432 if (ctx->state == NULL)
3433 return;
3434 if (is_sync)
643168c2 3435 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 3436 else
643168c2 3437 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 3438}
1da177e4 3439
b944dba3
TM		 3440#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3441#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
dff25ddb 3442#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_MODE_UMASK - 1UL)
b944dba3 3443
1da177e4
LT		 3444static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3445{
8c61282f 3446 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 3447 struct nfs4_server_caps_arg args = {
3448 .fhandle = fhandle,
8c61282f 3449 .bitmask = bitmask,
43652ad5 3450 };
1da177e4
LT		 3451 struct nfs4_server_caps_res res = {};
3452 struct rpc_message msg = {
3453 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 3454 .rpc_argp = &args,
1da177e4
LT		 3455 .rpc_resp = &res,
3456 };
3457 int status;
f4b23de3 3458 int i;
1da177e4 3459
8c61282f
KM		 3460 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3461 FATTR4_WORD0_FH_EXPIRE_TYPE |
3462 FATTR4_WORD0_LINK_SUPPORT |
3463 FATTR4_WORD0_SYMLINK_SUPPORT |
3464 FATTR4_WORD0_ACLSUPPORT;
3465 if (minorversion)
3466 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3467
7c513058 3468 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3469 if (status == 0) {
b944dba3 3470 /* Sanity check the server answers */
8c61282f 3471 switch (minorversion) {
b944dba3
TM		 3472 case 0:
3473 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3474 res.attr_bitmask[2] = 0;
3475 break;
3476 case 1:
3477 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3478 break;
3479 case 2:
3480 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3481 }
1da177e4 3482 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 3483 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3484 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3485 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3486 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 3487 NFS_CAP_CTIME|NFS_CAP_MTIME|
3488 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 3489 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3490 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 3491 server->caps |= NFS_CAP_ACLS;
3492 if (res.has_links != 0)
3493 server->caps |= NFS_CAP_HARDLINKS;
3494 if (res.has_symlinks != 0)
3495 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 3496 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3497 server->caps |= NFS_CAP_FILEID;
3498 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3499 server->caps |= NFS_CAP_MODE;
3500 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3501 server->caps |= NFS_CAP_NLINK;
3502 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3503 server->caps |= NFS_CAP_OWNER;
3504 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3505 server->caps |= NFS_CAP_OWNER_GROUP;
3506 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3507 server->caps |= NFS_CAP_ATIME;
3508 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3509 server->caps |= NFS_CAP_CTIME;
3510 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3511 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 3512#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3513 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3514 server->caps |= NFS_CAP_SECURITY_LABEL;
3515#endif
3516 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3517 sizeof(server->attr_bitmask));
b944dba3 3518 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 3519
a65318bf
TM		 3520 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3521 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3522 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 3523 server->cache_consistency_bitmask[2] = 0;
f4b23de3
TM		 3524
3525 /* Avoid a regression due to buggy server */
3526 for (i = 0; i < ARRAY_SIZE(res.exclcreat_bitmask); i++)
3527 res.exclcreat_bitmask[i] &= res.attr_bitmask[i];
8c61282f
KM		 3528 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3529 sizeof(server->exclcreat_bitmask));
f4b23de3 3530
1da177e4 3531 server->acl_bitmask = res.acl_bitmask;
264e6351 3532 server->fh_expire_type = res.fh_expire_type;
1da177e4 3533 }
cccef3b9 3534
1da177e4
LT		 3535 return status;
3536}
3537
55a97593 3538int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 3539{
3540 struct nfs4_exception exception = { };
3541 int err;
3542 do {
3543 err = nfs4_handle_exception(server,
3544 _nfs4_server_capabilities(server, fhandle),
3545 &exception);
3546 } while (exception.retry);
3547 return err;
3548}
3549
3550static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3551 struct nfs_fsinfo *info)
3552{
aa9c2669 3553 u32 bitmask[3];
1da177e4 3554 struct nfs4_lookup_root_arg args = {
aa9c2669 3555 .bitmask = bitmask,
1da177e4
LT		 3556 };
3557 struct nfs4_lookup_res res = {
3558 .server = server,
0e574af1 3559 .fattr = info->fattr,
1da177e4
LT		 3560 .fh = fhandle,
3561 };
3562 struct rpc_message msg = {
3563 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3564 .rpc_argp = &args,
3565 .rpc_resp = &res,
3566 };
008f55d0 3567
aa9c2669
DQ		 3568 bitmask[0] = nfs4_fattr_bitmap[0];
3569 bitmask[1] = nfs4_fattr_bitmap[1];
3570 /*
3571 * Process the label in the upcoming getfattr
3572 */
3573 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3574
0e574af1 3575 nfs_fattr_init(info->fattr);
7c513058 3576 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3577}
3578
3579static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3580 struct nfs_fsinfo *info)
3581{
3582 struct nfs4_exception exception = { };
3583 int err;
3584 do {
fb8a5ba8 3585 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3586 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3587 switch (err) {
3588 case 0:
3589 case -NFS4ERR_WRONGSEC:
05e9cfb4 3590 goto out;
fb8a5ba8
BS		 3591 default:
3592 err = nfs4_handle_exception(server, err, &exception);
3593 }
1da177e4 3594 } while (exception.retry);
05e9cfb4 3595out:
1da177e4
LT		 3596 return err;
3597}
3598
8f70e95f
BS		 3599static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3600 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3601{
c2190661
TM		 3602 struct rpc_auth_create_args auth_args = {
3603 .pseudoflavor = flavor,
3604 };
8f70e95f 3605 struct rpc_auth *auth;
8f70e95f 3606
c2190661 3607 auth = rpcauth_create(&auth_args, server->client);
9df1336c
AS		 3608 if (IS_ERR(auth))
3609 return -EACCES;
3610 return nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3611}
3612
9a744ba3
CL		 3613/*
3614 * Retry pseudoroot lookup with various security flavors. We do this when:
3615 *
3616 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3617 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3618 *
3619 * Returns zero on success, or a negative NFS4ERR value, or a
3620 * negative errno value.
3621 */
801a16dc 3622static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3623 struct nfs_fsinfo *info)
1da177e4 3624{
9a744ba3
CL		 3625 /* Per 3530bis 15.33.5 */
3626 static const rpc_authflavor_t flav_array[] = {
3627 RPC_AUTH_GSS_KRB5P,
3628 RPC_AUTH_GSS_KRB5I,
3629 RPC_AUTH_GSS_KRB5,
c4eafe11 3630 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3631 RPC_AUTH_NULL,
3632 };
3633 int status = -EPERM;
3634 size_t i;
6a1a1e34 3635
4d4b69dd
WAA		 3636 if (server->auth_info.flavor_len > 0) {
3637 /* try each flavor specified by user */
3638 for (i = 0; i < server->auth_info.flavor_len; i++) {
3639 status = nfs4_lookup_root_sec(server, fhandle, info,
3640 server->auth_info.flavors[i]);
3641 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3642 continue;
3643 break;
3644 }
3645 } else {
3646 /* no flavors specified by user, try default list */
3647 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3648 status = nfs4_lookup_root_sec(server, fhandle, info,
3649 flav_array[i]);
3650 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3651 continue;
3652 break;
3653 }
8f70e95f 3654 }
9a744ba3 3655
fb8a5ba8
BS		 3656 /*
3657 * -EACCESS could mean that the user doesn't have correct permissions
3658 * to access the mount. It could also mean that we tried to mount
3659 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3660 * existing mount programs don't handle -EACCES very well so it should
3661 * be mapped to -EPERM instead.
3662 */
3663 if (status == -EACCES)
3664 status = -EPERM;
801a16dc
BS		 3665 return status;
3666}
3667
2ed4b95b
CL		 3668/**
3669 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3670 * @server: initialized nfs_server handle
3671 * @fhandle: we fill in the pseudo-fs root file handle
3672 * @info: we fill in an FSINFO struct
5e6b1990 3673 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3674 *
3675 * Returns zero on success, or a negative errno.
801a16dc 3676 */
3028eb2b 3677int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3678 struct nfs_fsinfo *info,
3679 bool auth_probe)
801a16dc 3680{
c7757074 3681 int status = 0;
2ed4b95b 3682
c7757074 3683 if (!auth_probe)
5e6b1990 3684 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3685
3686 if (auth_probe || status == NFS4ERR_WRONGSEC)
698c937b
TM		 3687 status = server->nfs_client->cl_mvops->find_root_sec(server,
3688 fhandle, info);
2ed4b95b 3689
1da177e4
LT		 3690 if (status == 0)
3691 status = nfs4_server_capabilities(server, fhandle);
3692 if (status == 0)
3693 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3694
c12e87f4 3695 return nfs4_map_errors(status);
1da177e4
LT		 3696}
3697
bae36241
BS		 3698static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3699 struct nfs_fsinfo *info)
3700{
3701 int error;
3702 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3703 struct nfs4_label *label = NULL;
bae36241
BS		 3704
3705 error = nfs4_server_capabilities(server, mntfh);
3706 if (error < 0) {
3707 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3708 return error;
3709 }
3710
14c43f76
DQ		 3711 label = nfs4_label_alloc(server, GFP_KERNEL);
3712 if (IS_ERR(label))
3713 return PTR_ERR(label);
3714
1775fd3e 3715 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3716 if (error < 0) {
3717 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3718 goto err_free_label;
bae36241
BS		 3719 }
3720
3721 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3722 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3723 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3724
14c43f76
DQ		 3725err_free_label:
3726 nfs4_label_free(label);
3727
bae36241
BS		 3728 return error;
3729}
3730
6b97fd3d
MN		 3731/*
3732 * Get locations and (maybe) other attributes of a referral.
3733 * Note that we'll actually follow the referral later when
3734 * we detect fsid mismatch in inode revalidation
3735 */
f05d147f
BS		 3736static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3737 const struct qstr *name, struct nfs_fattr *fattr,
3738 struct nfs_fh *fhandle)
6b97fd3d
MN		 3739{
3740 int status = -ENOMEM;
3741 struct page *page = NULL;
3742 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3743
3744 page = alloc_page(GFP_KERNEL);
3745 if (page == NULL)
3746 goto out;
3747 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3748 if (locations == NULL)
3749 goto out;
3750
f05d147f 3751 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3752 if (status != 0)
3753 goto out;
519ae255
CL		 3754
3755 /*
3756 * If the fsid didn't change, this is a migration event, not a
3757 * referral. Cause us to drop into the exception handler, which
3758 * will kick off migration recovery.
3759 */
6b97fd3d 3760 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3761 dprintk("%s: server did not return a different fsid for"
3762 " a referral at %s\n", __func__, name->name);
519ae255 3763 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3764 goto out;
3765 }
533eb461
AA		 3766 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3767 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3768
533eb461 3769 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3770 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3771 memset(fhandle, 0, sizeof(struct nfs_fh));
3772out:
3773 if (page)
3774 __free_page(page);
5d7ca35a 3775 kfree(locations);
6b97fd3d
MN		 3776 return status;
3777}
3778
1775fd3e
DQ		 3779static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3780 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3781{
3782 struct nfs4_getattr_arg args = {
3783 .fh = fhandle,
3784 .bitmask = server->attr_bitmask,
3785 };
3786 struct nfs4_getattr_res res = {
3787 .fattr = fattr,
1775fd3e 3788 .label = label,
1da177e4
LT		 3789 .server = server,
3790 };
3791 struct rpc_message msg = {
3792 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3793 .rpc_argp = &args,
3794 .rpc_resp = &res,
3795 };
aa9c2669
DQ		 3796
3797 args.bitmask = nfs4_bitmask(server, label);
3798
0e574af1 3799 nfs_fattr_init(fattr);
7c513058 3800 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3801}
3802
1775fd3e
DQ		 3803static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3804 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3805{
3806 struct nfs4_exception exception = { };
3807 int err;
3808 do {
b5f875a9
TM		 3809 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3810 trace_nfs4_getattr(server, fhandle, fattr, err);
3811 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3812 &exception);
3813 } while (exception.retry);
3814 return err;
3815}
3816
3817/*
3818 * The file is not closed if it is opened due to the a request to change
3819 * the size of the file. The open call will not be needed once the
3820 * VFS layer lookup-intents are implemented.
3821 *
3822 * Close is called when the inode is destroyed.
3823 * If we haven't opened the file for O_WRONLY, we
3824 * need to in the size_change case to obtain a stateid.
3825 *
3826 * Got race?
3827 * Because OPEN is always done by name in nfsv4, it is
3828 * possible that we opened a different file by the same
3829 * name. We can recognize this race condition, but we
3830 * can't do anything about it besides returning an error.
3831 *
3832 * This will be fixed with VFS changes (lookup-intent).
3833 */
3834static int
3835nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3836 struct iattr *sattr)
3837{
2b0143b5 3838 struct inode *inode = d_inode(dentry);
659bfcd6 3839 struct rpc_cred *cred = NULL;
29b59f94 3840 struct nfs_open_context *ctx = NULL;
14c43f76 3841 struct nfs4_label *label = NULL;
1da177e4
LT		 3842 int status;
3843
88ac815c
PT		 3844 if (pnfs_ld_layoutret_on_setattr(inode) &&
3845 sattr->ia_valid & ATTR_SIZE &&
3846 sattr->ia_size < i_size_read(inode))
24028672 3847 pnfs_commit_and_return_layout(inode);
8a1636c4 3848
0e574af1 3849 nfs_fattr_init(fattr);
1da177e4 3850
2669940d
AA		 3851 /* Deal with open(O_TRUNC) */
3852 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3853 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3854
3855 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3856 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3857 return 0;
3858
d530838b 3859 /* Search for an existing open(O_WRITE) file */
659bfcd6 3860 if (sattr->ia_valid & ATTR_FILE) {
659bfcd6
TM		 3861
3862 ctx = nfs_file_open_context(sattr->ia_file);
29b59f94 3863 if (ctx)
504e5189 3864 cred = ctx->cred;
659bfcd6 3865 }
08e9eac4 3866
14c43f76
DQ		 3867 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3868 if (IS_ERR(label))
3869 return PTR_ERR(label);
3870
29b59f94 3871 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label);
aa9c2669 3872 if (status == 0) {
f044636d 3873 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3874 nfs_setsecurity(inode, fattr, label);
3875 }
14c43f76 3876 nfs4_label_free(label);
1da177e4
LT		 3877 return status;
3878}
3879
0c2e53f1
TM		 3880static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3881 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3882 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3883{
0c2e53f1 3884 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3885 int status;
3886 struct nfs4_lookup_arg args = {
3887 .bitmask = server->attr_bitmask,
0c2e53f1 3888 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3889 .name = name,
3890 };
3891 struct nfs4_lookup_res res = {
3892 .server = server,
3893 .fattr = fattr,
aa9c2669 3894 .label = label,
2b3de441
DH		 3895 .fh = fhandle,
3896 };
3897 struct rpc_message msg = {
3898 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3899 .rpc_argp = &args,
3900 .rpc_resp = &res,
3901 };
3902
aa9c2669
DQ		 3903 args.bitmask = nfs4_bitmask(server, label);
3904
2b3de441
DH		 3905 nfs_fattr_init(fattr);
3906
1da177e4 3907 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3908 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3909 dprintk("NFS reply lookup: %d\n", status);
3910 return status;
3911}
3912
72de53ec 3913static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3914{
7ebb9315 3915 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3916 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3917 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3918 fattr->nlink = 2;
3919}
3920
72de53ec 3921static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
beffb8fe 3922 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3923 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3924{
3925 struct nfs4_exception exception = { };
72de53ec 3926 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3927 int err;
3928 do {
1775fd3e 3929 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3930 trace_nfs4_lookup(dir, name, err);
72de53ec 3931 switch (err) {
08ef7bd3 3932 case -NFS4ERR_BADNAME:
72de53ec
BS		 3933 err = -ENOENT;
3934 goto out;
0c2e53f1 3935 case -NFS4ERR_MOVED:
f05d147f 3936 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3937 if (err == -NFS4ERR_MOVED)
3938 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3939 goto out;
0c2e53f1 3940 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3941 err = -EPERM;
3942 if (client != *clnt)
3943 goto out;
66b06860 3944 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3945 if (IS_ERR(client))
3946 return PTR_ERR(client);
3947
3948 exception.retry = 1;
3949 break;
3950 default:
3951 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3952 }
1da177e4 3953 } while (exception.retry);
72de53ec
BS		 3954
3955out:
3956 if (err == 0)
3957 *clnt = client;
3958 else if (client != *clnt)
3959 rpc_shutdown_client(client);
3960
1da177e4
LT		 3961 return err;
3962}
3963
beffb8fe 3964static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1775fd3e
DQ		 3965 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3966 struct nfs4_label *label)
72de53ec
BS		 3967{
3968 int status;
3969 struct rpc_clnt *client = NFS_CLIENT(dir);
3970
1775fd3e 3971 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3972 if (client != NFS_CLIENT(dir)) {
3973 rpc_shutdown_client(client);
3974 nfs_fixup_secinfo_attributes(fattr);
3975 }
3976 return status;
3977}
3978
f05d147f 3979struct rpc_clnt *
beffb8fe 3980nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name,
f05d147f
BS		 3981 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3982{
b72888cb 3983 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3984 int status;
f05d147f 3985
1775fd3e 3986 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3987 if (status < 0)
f05d147f 3988 return ERR_PTR(status);
b72888cb 3989 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3990}
3991
5b5faaf6
JL		 3992static int _nfs4_proc_lookupp(struct inode *inode,
3993 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3994 struct nfs4_label *label)
3995{
3996 struct rpc_clnt *clnt = NFS_CLIENT(inode);
3997 struct nfs_server *server = NFS_SERVER(inode);
3998 int status;
3999 struct nfs4_lookupp_arg args = {
4000 .bitmask = server->attr_bitmask,
4001 .fh = NFS_FH(inode),
4002 };
4003 struct nfs4_lookupp_res res = {
4004 .server = server,
4005 .fattr = fattr,
4006 .label = label,
4007 .fh = fhandle,
4008 };
4009 struct rpc_message msg = {
4010 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUPP],
4011 .rpc_argp = &args,
4012 .rpc_resp = &res,
4013 };
4014
4015 args.bitmask = nfs4_bitmask(server, label);
4016
4017 nfs_fattr_init(fattr);
4018
4019 dprintk("NFS call lookupp ino=0x%lx\n", inode->i_ino);
4020 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
4021 &res.seq_res, 0);
4022 dprintk("NFS reply lookupp: %d\n", status);
4023 return status;
4024}
4025
4026static int nfs4_proc_lookupp(struct inode *inode, struct nfs_fh *fhandle,
4027 struct nfs_fattr *fattr, struct nfs4_label *label)
4028{
4029 struct nfs4_exception exception = { };
4030 int err;
4031 do {
4032 err = _nfs4_proc_lookupp(inode, fhandle, fattr, label);
4033 trace_nfs4_lookupp(inode, err);
4034 err = nfs4_handle_exception(NFS_SERVER(inode), err,
4035 &exception);
4036 } while (exception.retry);
4037 return err;
4038}
4039
1da177e4
LT		 4040static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
4041{
76b32999 4042 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 4043 struct nfs4_accessargs args = {
4044 .fh = NFS_FH(inode),
a4980e78 4045 .bitmask = server->cache_consistency_bitmask,
1750d929 4046 .access = entry->mask,
76b32999
TM		 4047 };
4048 struct nfs4_accessres res = {
4049 .server = server,
1da177e4 4050 };
1da177e4
LT		 4051 struct rpc_message msg = {
4052 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
4053 .rpc_argp = &args,
4054 .rpc_resp = &res,
4055 .rpc_cred = entry->cred,
4056 };
aa9c2669 4057 int status = 0;
1da177e4 4058
c407d41a
TM		 4059 res.fattr = nfs_alloc_fattr();
4060 if (res.fattr == NULL)
4061 return -ENOMEM;
4062
7c513058 4063 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 4064 if (!status) {
6168f62c 4065 nfs_access_set_mask(entry, res.access);
c407d41a 4066 nfs_refresh_inode(inode, res.fattr);
1da177e4 4067 }
c407d41a 4068 nfs_free_fattr(res.fattr);
1da177e4
LT		 4069 return status;
4070}
4071
4072static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
4073{
4074 struct nfs4_exception exception = { };
4075 int err;
4076 do {
c1578b76
TM		 4077 err = _nfs4_proc_access(inode, entry);
4078 trace_nfs4_access(inode, err);
4079 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 4080 &exception);
4081 } while (exception.retry);
4082 return err;
4083}
4084
4085/*
4086 * TODO: For the time being, we don't try to get any attributes
4087 * along with any of the zero-copy operations READ, READDIR,
4088 * READLINK, WRITE.
4089 *
4090 * In the case of the first three, we want to put the GETATTR
4091 * after the read-type operation -- this is because it is hard
4092 * to predict the length of a GETATTR response in v4, and thus
4093 * align the READ data correctly. This means that the GETATTR
4094 * may end up partially falling into the page cache, and we should
4095 * shift it into the 'tail' of the xdr_buf before processing.
4096 * To do this efficiently, we need to know the total length
4097 * of data received, which doesn't seem to be available outside
4098 * of the RPC layer.
4099 *
4100 * In the case of WRITE, we also want to put the GETATTR after
4101 * the operation -- in this case because we want to make sure
140150db 4102 * we get the post-operation mtime and size.
1da177e4
LT		 4103 *
4104 * Both of these changes to the XDR layer would in fact be quite
4105 * minor, but I decided to leave them for a subsequent patch.
4106 */
4107static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
4108 unsigned int pgbase, unsigned int pglen)
4109{
4110 struct nfs4_readlink args = {
4111 .fh = NFS_FH(inode),
4112 .pgbase = pgbase,
4113 .pglen = pglen,
4114 .pages = &page,
4115 };
f50c7000 4116 struct nfs4_readlink_res res;
1da177e4
LT		 4117 struct rpc_message msg = {
4118 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
4119 .rpc_argp = &args,
f50c7000 4120 .rpc_resp = &res,
1da177e4
LT		 4121 };
4122
7c513058 4123 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4124}
4125
4126static int nfs4_proc_readlink(struct inode *inode, struct page *page,
4127 unsigned int pgbase, unsigned int pglen)
4128{
4129 struct nfs4_exception exception = { };
4130 int err;
4131 do {
c1578b76
TM		 4132 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
4133 trace_nfs4_readlink(inode, err);
4134 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 4135 &exception);
4136 } while (exception.retry);
4137 return err;
4138}
4139
1da177e4 4140/*
8867fe58 4141 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 4142 */
1da177e4
LT		 4143static int
4144nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 4145 int flags)
1da177e4 4146{
dff25ddb 4147 struct nfs_server *server = NFS_SERVER(dir);
aa9c2669 4148 struct nfs4_label l, *ilabel = NULL;
8867fe58 4149 struct nfs_open_context *ctx;
1da177e4 4150 struct nfs4_state *state;
1da177e4
LT		 4151 int status = 0;
4152
532d4def 4153 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL);
8867fe58
MS		 4154 if (IS_ERR(ctx))
4155 return PTR_ERR(ctx);
4156
aa9c2669
DQ		 4157 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
4158
dff25ddb
AG		 4159 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4160 sattr->ia_mode &= ~current_umask();
c5c3fb5f 4161 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 4162 if (IS_ERR(state)) {
4163 status = PTR_ERR(state);
c0204fd2 4164 goto out;
1da177e4 4165 }
1da177e4 4166out:
aa9c2669 4167 nfs4_label_release_security(ilabel);
8867fe58 4168 put_nfs_open_context(ctx);
1da177e4
LT		 4169 return status;
4170}
4171
beffb8fe 4172static int _nfs4_proc_remove(struct inode *dir, const struct qstr *name)
1da177e4 4173{
16e42959 4174 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 4175 struct nfs_removeargs args = {
1da177e4 4176 .fh = NFS_FH(dir),
26fe5750 4177 .name = *name,
16e42959 4178 };
4fdc17b2 4179 struct nfs_removeres res = {
16e42959 4180 .server = server,
1da177e4 4181 };
1da177e4 4182 struct rpc_message msg = {
4fdc17b2
TM		 4183 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
4184 .rpc_argp = &args,
4185 .rpc_resp = &res,
1da177e4 4186 };
d3129ef6 4187 unsigned long timestamp = jiffies;
778d2817 4188 int status;
1da177e4 4189
7c513058 4190 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 4191 if (status == 0)
d3129ef6 4192 update_changeattr(dir, &res.cinfo, timestamp);
1da177e4
LT		 4193 return status;
4194}
4195
beffb8fe 4196static int nfs4_proc_remove(struct inode *dir, const struct qstr *name)
1da177e4
LT		 4197{
4198 struct nfs4_exception exception = { };
4199 int err;
4200 do {
078ea3df
TM		 4201 err = _nfs4_proc_remove(dir, name);
4202 trace_nfs4_remove(dir, name, err);
4203 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4204 &exception);
4205 } while (exception.retry);
4206 return err;
4207}
4208
e4eff1a6 4209static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 4210{
e4eff1a6
TM		 4211 struct nfs_server *server = NFS_SERVER(dir);
4212 struct nfs_removeargs *args = msg->rpc_argp;
4213 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 4214
e4eff1a6 4215 res->server = server;
1da177e4 4216 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 4217 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 4218
4219 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 4220}
4221
34e137cc
BS		 4222static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
4223{
42e1cca7 4224 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb)->nfs_client,
d9afbd1b
TM		 4225 &data->args.seq_args,
4226 &data->res.seq_res,
4227 task);
1da177e4
LT		 4228}
4229
e4eff1a6 4230static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 4231{
078ea3df
TM		 4232 struct nfs_unlinkdata *data = task->tk_calldata;
4233 struct nfs_removeres *res = &data->res;
e4eff1a6 4234
14516c3a
TM		 4235 if (!nfs4_sequence_done(task, &res->seq_res))
4236 return 0;
8478eaa1
N		 4237 if (nfs4_async_handle_error(task, res->server, NULL,
4238 &data->timeout) == -EAGAIN)
e4eff1a6 4239 return 0;
c40d52fe 4240 if (task->tk_status == 0)
d3129ef6 4241 update_changeattr(dir, &res->cinfo, res->dir_attr->time_start);
e4eff1a6 4242 return 1;
1da177e4
LT		 4243}
4244
d3d4152a
JL		 4245static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
4246{
4247 struct nfs_server *server = NFS_SERVER(dir);
4248 struct nfs_renameargs *arg = msg->rpc_argp;
4249 struct nfs_renameres *res = msg->rpc_resp;
4250
4251 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 4252 res->server = server;
a9c92d6b 4253 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 4254}
4255
c6bfa1a1
BS		 4256static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
4257{
42e1cca7 4258 nfs4_setup_sequence(NFS_SERVER(data->old_dir)->nfs_client,
d9afbd1b
TM		 4259 &data->args.seq_args,
4260 &data->res.seq_res,
4261 task);
d3d4152a
JL		 4262}
4263
4264static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
4265 struct inode *new_dir)
4266{
fbc6f7c2
TM		 4267 struct nfs_renamedata *data = task->tk_calldata;
4268 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 4269
4270 if (!nfs4_sequence_done(task, &res->seq_res))
4271 return 0;
8478eaa1 4272 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 4273 return 0;
4274
c733c49c 4275 if (task->tk_status == 0) {
d3129ef6 4276 update_changeattr(old_dir, &res->old_cinfo, res->old_fattr->time_start);
c733c49c 4277 if (new_dir != old_dir)
d3129ef6 4278 update_changeattr(new_dir, &res->new_cinfo, res->new_fattr->time_start);
c733c49c 4279 }
d3d4152a
JL		 4280 return 1;
4281}
4282
beffb8fe 4283static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4 4284{
91ba2eee 4285 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 4286 struct nfs4_link_arg arg = {
4287 .fh = NFS_FH(inode),
4288 .dir_fh = NFS_FH(dir),
4289 .name = name,
91ba2eee
TM		 4290 .bitmask = server->attr_bitmask,
4291 };
91ba2eee
TM		 4292 struct nfs4_link_res res = {
4293 .server = server,
1775fd3e 4294 .label = NULL,
1da177e4 4295 };
1da177e4
LT		 4296 struct rpc_message msg = {
4297 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
4298 .rpc_argp = &arg,
91ba2eee 4299 .rpc_resp = &res,
1da177e4 4300 };
136f2627
TM		 4301 int status = -ENOMEM;
4302
4303 res.fattr = nfs_alloc_fattr();
778d2817 4304 if (res.fattr == NULL)
136f2627 4305 goto out;
1da177e4 4306
14c43f76
DQ		 4307 res.label = nfs4_label_alloc(server, GFP_KERNEL);
4308 if (IS_ERR(res.label)) {
4309 status = PTR_ERR(res.label);
4310 goto out;
4311 }
aa9c2669 4312 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 4313
7c513058 4314 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee 4315 if (!status) {
d3129ef6 4316 update_changeattr(dir, &res.cinfo, res.fattr->time_start);
aa9c2669
DQ		 4317 status = nfs_post_op_update_inode(inode, res.fattr);
4318 if (!status)
4319 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 4320 }
14c43f76
DQ		 4321
4322
4323 nfs4_label_free(res.label);
4324
136f2627 4325out:
136f2627 4326 nfs_free_fattr(res.fattr);
1da177e4
LT		 4327 return status;
4328}
4329
beffb8fe 4330static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4
LT		 4331{
4332 struct nfs4_exception exception = { };
4333 int err;
4334 do {
4335 err = nfs4_handle_exception(NFS_SERVER(inode),
4336 _nfs4_proc_link(inode, dir, name),
4337 &exception);
4338 } while (exception.retry);
4339 return err;
4340}
4341
57dc9a57
TM		 4342struct nfs4_createdata {
4343 struct rpc_message msg;
4344 struct nfs4_create_arg arg;
4345 struct nfs4_create_res res;
4346 struct nfs_fh fh;
4347 struct nfs_fattr fattr;
1775fd3e 4348 struct nfs4_label *label;
57dc9a57
TM		 4349};
4350
4351static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
beffb8fe 4352 const struct qstr *name, struct iattr *sattr, u32 ftype)
57dc9a57
TM		 4353{
4354 struct nfs4_createdata *data;
4355
4356 data = kzalloc(sizeof(*data), GFP_KERNEL);
4357 if (data != NULL) {
4358 struct nfs_server *server = NFS_SERVER(dir);
4359
14c43f76
DQ		 4360 data->label = nfs4_label_alloc(server, GFP_KERNEL);
4361 if (IS_ERR(data->label))
4362 goto out_free;
4363
57dc9a57
TM		 4364 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
4365 data->msg.rpc_argp = &data->arg;
4366 data->msg.rpc_resp = &data->res;
4367 data->arg.dir_fh = NFS_FH(dir);
4368 data->arg.server = server;
4369 data->arg.name = name;
4370 data->arg.attrs = sattr;
4371 data->arg.ftype = ftype;
aa9c2669 4372 data->arg.bitmask = nfs4_bitmask(server, data->label);
dff25ddb 4373 data->arg.umask = current_umask();
57dc9a57
TM		 4374 data->res.server = server;
4375 data->res.fh = &data->fh;
4376 data->res.fattr = &data->fattr;
1775fd3e 4377 data->res.label = data->label;
57dc9a57 4378 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 4379 }
4380 return data;
14c43f76
DQ		 4381out_free:
4382 kfree(data);
4383 return NULL;
57dc9a57
TM		 4384}
4385
4386static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
4387{
7c513058 4388 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 4389 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57 4390 if (status == 0) {
d3129ef6
TM		 4391 update_changeattr(dir, &data->res.dir_cinfo,
4392 data->res.fattr->time_start);
1775fd3e 4393 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 4394 }
4395 return status;
4396}
4397
4398static void nfs4_free_createdata(struct nfs4_createdata *data)
4399{
14c43f76 4400 nfs4_label_free(data->label);
57dc9a57
TM		 4401 kfree(data);
4402}
4403
4f390c15 4404static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 4405 struct page *page, unsigned int len, struct iattr *sattr,
4406 struct nfs4_label *label)
1da177e4 4407{
57dc9a57
TM		 4408 struct nfs4_createdata *data;
4409 int status = -ENAMETOOLONG;
1da177e4 4410
94a6d753 4411 if (len > NFS4_MAXPATHLEN)
57dc9a57 4412 goto out;
4f390c15 4413
57dc9a57
TM		 4414 status = -ENOMEM;
4415 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
4416 if (data == NULL)
4417 goto out;
4418
4419 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
4420 data->arg.u.symlink.pages = &page;
4421 data->arg.u.symlink.len = len;
1775fd3e 4422 data->arg.label = label;
1da177e4 4423
57dc9a57
TM		 4424 status = nfs4_do_create(dir, dentry, data);
4425
4426 nfs4_free_createdata(data);
4427out:
1da177e4
LT		 4428 return status;
4429}
4430
4f390c15 4431static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 4432 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 4433{
4434 struct nfs4_exception exception = { };
aa9c2669 4435 struct nfs4_label l, *label = NULL;
1da177e4 4436 int err;
aa9c2669
DQ		 4437
4438 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4439
1da177e4 4440 do {
078ea3df
TM		 4441 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4442 trace_nfs4_symlink(dir, &dentry->d_name, err);
4443 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4444 &exception);
4445 } while (exception.retry);
aa9c2669
DQ		 4446
4447 nfs4_label_release_security(label);
1da177e4
LT		 4448 return err;
4449}
4450
4451static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 4452 struct iattr *sattr, struct nfs4_label *label)
1da177e4 4453{
57dc9a57
TM		 4454 struct nfs4_createdata *data;
4455 int status = -ENOMEM;
1da177e4 4456
57dc9a57
TM		 4457 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4458 if (data == NULL)
4459 goto out;
4460
1775fd3e 4461 data->arg.label = label;
57dc9a57
TM		 4462 status = nfs4_do_create(dir, dentry, data);
4463
4464 nfs4_free_createdata(data);
4465out:
1da177e4
LT		 4466 return status;
4467}
4468
4469static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4470 struct iattr *sattr)
4471{
dff25ddb 4472 struct nfs_server *server = NFS_SERVER(dir);
1da177e4 4473 struct nfs4_exception exception = { };
aa9c2669 4474 struct nfs4_label l, *label = NULL;
1da177e4 4475 int err;
a8a5da99 4476
aa9c2669
DQ		 4477 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4478
dff25ddb
AG		 4479 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4480 sattr->ia_mode &= ~current_umask();
1da177e4 4481 do {
078ea3df
TM		 4482 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4483 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4484 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4485 &exception);
4486 } while (exception.retry);
aa9c2669
DQ		 4487 nfs4_label_release_security(label);
4488
1da177e4
LT		 4489 return err;
4490}
4491
4492static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
a7a3b1e9 4493 u64 cookie, struct page **pages, unsigned int count, bool plus)
1da177e4 4494{
2b0143b5 4495 struct inode *dir = d_inode(dentry);
1da177e4
LT		 4496 struct nfs4_readdir_arg args = {
4497 .fh = NFS_FH(dir),
56e4ebf8 4498 .pages = pages,
1da177e4
LT		 4499 .pgbase = 0,
4500 .count = count,
2b0143b5 4501 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 4502 .plus = plus,
1da177e4
LT		 4503 };
4504 struct nfs4_readdir_res res;
4505 struct rpc_message msg = {
4506 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4507 .rpc_argp = &args,
4508 .rpc_resp = &res,
4509 .rpc_cred = cred,
4510 };
4511 int status;
4512
6de1472f
AV		 4513 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4514 dentry,
eadf4598 4515 (unsigned long long)cookie);
c3f52af3 4516 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 4517 res.pgbase = args.pgbase;
7c513058 4518 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 4519 if (status >= 0) {
c3f52af3 4520 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 4521 status += args.pgbase;
4522 }
c4812998
TM		 4523
4524 nfs_invalidate_atime(dir);
4525
3110ff80 4526 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 4527 return status;
4528}
4529
4530static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
a7a3b1e9 4531 u64 cookie, struct page **pages, unsigned int count, bool plus)
1da177e4
LT		 4532{
4533 struct nfs4_exception exception = { };
4534 int err;
4535 do {
c1578b76
TM		 4536 err = _nfs4_proc_readdir(dentry, cred, cookie,
4537 pages, count, plus);
2b0143b5
DH		 4538 trace_nfs4_readdir(d_inode(dentry), err);
4539 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 4540 &exception);
4541 } while (exception.retry);
4542 return err;
4543}
4544
4545static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 4546 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 4547{
57dc9a57
TM		 4548 struct nfs4_createdata *data;
4549 int mode = sattr->ia_mode;
4550 int status = -ENOMEM;
1da177e4 4551
57dc9a57
TM		 4552 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4553 if (data == NULL)
4554 goto out;
4555
1da177e4 4556 if (S_ISFIFO(mode))
57dc9a57 4557 data->arg.ftype = NF4FIFO;
1da177e4 4558 else if (S_ISBLK(mode)) {
57dc9a57
TM		 4559 data->arg.ftype = NF4BLK;
4560 data->arg.u.device.specdata1 = MAJOR(rdev);
4561 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 4562 }
4563 else if (S_ISCHR(mode)) {
57dc9a57
TM		 4564 data->arg.ftype = NF4CHR;
4565 data->arg.u.device.specdata1 = MAJOR(rdev);
4566 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 4567 } else if (!S_ISSOCK(mode)) {
4568 status = -EINVAL;
4569 goto out_free;
1da177e4 4570 }
1775fd3e 4571
aa9c2669 4572 data->arg.label = label;
57dc9a57 4573 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 4574out_free:
57dc9a57
TM		 4575 nfs4_free_createdata(data);
4576out:
1da177e4
LT		 4577 return status;
4578}
4579
4580static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4581 struct iattr *sattr, dev_t rdev)
4582{
dff25ddb 4583 struct nfs_server *server = NFS_SERVER(dir);
1da177e4 4584 struct nfs4_exception exception = { };
aa9c2669 4585 struct nfs4_label l, *label = NULL;
1da177e4 4586 int err;
a8a5da99 4587
aa9c2669
DQ		 4588 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4589
dff25ddb
AG		 4590 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4591 sattr->ia_mode &= ~current_umask();
1da177e4 4592 do {
078ea3df
TM		 4593 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4594 trace_nfs4_mknod(dir, &dentry->d_name, err);
4595 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4596 &exception);
4597 } while (exception.retry);
aa9c2669
DQ		 4598
4599 nfs4_label_release_security(label);
4600
1da177e4
LT		 4601 return err;
4602}
4603
4604static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4605 struct nfs_fsstat *fsstat)
4606{
4607 struct nfs4_statfs_arg args = {
4608 .fh = fhandle,
4609 .bitmask = server->attr_bitmask,
4610 };
24ad148a
BH		 4611 struct nfs4_statfs_res res = {
4612 .fsstat = fsstat,
4613 };
1da177e4
LT		 4614 struct rpc_message msg = {
4615 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4616 .rpc_argp = &args,
24ad148a 4617 .rpc_resp = &res,
1da177e4
LT		 4618 };
4619
0e574af1 4620 nfs_fattr_init(fsstat->fattr);
7c513058 4621 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4622}
4623
4624static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4625{
4626 struct nfs4_exception exception = { };
4627 int err;
4628 do {
4629 err = nfs4_handle_exception(server,
4630 _nfs4_proc_statfs(server, fhandle, fsstat),
4631 &exception);
4632 } while (exception.retry);
4633 return err;
4634}
4635
4636static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4637 struct nfs_fsinfo *fsinfo)
4638{
4639 struct nfs4_fsinfo_arg args = {
4640 .fh = fhandle,
4641 .bitmask = server->attr_bitmask,
4642 };
3dda5e43
BH		 4643 struct nfs4_fsinfo_res res = {
4644 .fsinfo = fsinfo,
4645 };
1da177e4
LT		 4646 struct rpc_message msg = {
4647 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4648 .rpc_argp = &args,
3dda5e43 4649 .rpc_resp = &res,
1da177e4
LT		 4650 };
4651
7c513058 4652 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4653}
4654
4655static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4656{
4657 struct nfs4_exception exception = { };
83ca7f5a 4658 unsigned long now = jiffies;
1da177e4
LT		 4659 int err;
4660
4661 do {
83ca7f5a 4662 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4663 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a 4664 if (err == 0) {
fb10fb67
TM		 4665 nfs4_set_lease_period(server->nfs_client,
4666 fsinfo->lease_time * HZ,
4667 now);
83ca7f5a
CL		 4668 break;
4669 }
4670 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4671 } while (exception.retry);
4672 return err;
4673}
4674
4675static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4676{
e38eb650
BS		 4677 int error;
4678
0e574af1 4679 nfs_fattr_init(fsinfo->fattr);
e38eb650 4680 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4681 if (error == 0) {
4682 /* block layout checks this! */
4683 server->pnfs_blksize = fsinfo->blksize;
ca440c38 4684 set_pnfs_layoutdriver(server, fhandle, fsinfo);
dc182549 4685 }
e38eb650
BS		 4686
4687 return error;
1da177e4
LT		 4688}
4689
4690static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4691 struct nfs_pathconf *pathconf)
4692{
4693 struct nfs4_pathconf_arg args = {
4694 .fh = fhandle,
4695 .bitmask = server->attr_bitmask,
4696 };
d45b2989
BH		 4697 struct nfs4_pathconf_res res = {
4698 .pathconf = pathconf,
4699 };
1da177e4
LT		 4700 struct rpc_message msg = {
4701 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4702 .rpc_argp = &args,
d45b2989 4703 .rpc_resp = &res,
1da177e4
LT		 4704 };
4705
4706 /* None of the pathconf attributes are mandatory to implement */
4707 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4708 memset(pathconf, 0, sizeof(*pathconf));
4709 return 0;
4710 }
4711
0e574af1 4712 nfs_fattr_init(pathconf->fattr);
7c513058 4713 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4714}
4715
4716static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4717 struct nfs_pathconf *pathconf)
4718{
4719 struct nfs4_exception exception = { };
4720 int err;
4721
4722 do {
4723 err = nfs4_handle_exception(server,
4724 _nfs4_proc_pathconf(server, fhandle, pathconf),
4725 &exception);
4726 } while (exception.retry);
4727 return err;
4728}
4729
5521abfd 4730int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4731 const struct nfs_open_context *ctx,
4732 const struct nfs_lock_context *l_ctx,
4733 fmode_t fmode)
4734{
17393475 4735 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL);
9b206149
TM		 4736}
4737EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4738
5521abfd
TM		 4739static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4740 const struct nfs_open_context *ctx,
4741 const struct nfs_lock_context *l_ctx,
4742 fmode_t fmode)
4743{
4744 nfs4_stateid current_stateid;
4745
e1253be0
TM		 4746 /* If the current stateid represents a lost lock, then exit */
4747 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4748 return true;
5521abfd
TM		 4749 return nfs4_stateid_match(stateid, &current_stateid);
4750}
4751
4752static bool nfs4_error_stateid_expired(int err)
4753{
4754 switch (err) {
4755 case -NFS4ERR_DELEG_REVOKED:
4756 case -NFS4ERR_ADMIN_REVOKED:
4757 case -NFS4ERR_BAD_STATEID:
4758 case -NFS4ERR_STALE_STATEID:
4759 case -NFS4ERR_OLD_STATEID:
4760 case -NFS4ERR_OPENMODE:
4761 case -NFS4ERR_EXPIRED:
4762 return true;
4763 }
4764 return false;
4765}
4766
d45f60c6 4767static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4768{
d45f60c6 4769 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4770
d45f60c6 4771 trace_nfs4_read(hdr, task->tk_status);
9c27869d
TM		 4772 if (task->tk_status < 0) {
4773 struct nfs4_exception exception = {
4774 .inode = hdr->inode,
4775 .state = hdr->args.context->state,
4776 .stateid = &hdr->args.stateid,
4777 };
4778 task->tk_status = nfs4_async_handle_exception(task,
4779 server, task->tk_status, &exception);
4780 if (exception.retry) {
4781 rpc_restart_call_prepare(task);
4782 return -EAGAIN;
4783 }
1da177e4 4784 }
8850df99 4785
1da177e4 4786 if (task->tk_status > 0)
d45f60c6 4787 renew_lease(server, hdr->timestamp);
ec06c096 4788 return 0;
1da177e4
LT		 4789}
4790
5521abfd 4791static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4792 struct nfs_pgio_args *args)
5521abfd
TM		 4793{
4794
4795 if (!nfs4_error_stateid_expired(task->tk_status) ||
4796 nfs4_stateid_is_current(&args->stateid,
4797 args->context,
4798 args->lock_context,
4799 FMODE_READ))
4800 return false;
4801 rpc_restart_call_prepare(task);
4802 return true;
4803}
4804
d45f60c6 4805static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4806{
4807
4808 dprintk("--> %s\n", __func__);
4809
d45f60c6 4810 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4811 return -EAGAIN;
d45f60c6 4812 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4813 return -EAGAIN;
bfc505de
TM		 4814 if (task->tk_status > 0)
4815 nfs_invalidate_atime(hdr->inode);
d45f60c6
WAA		 4816 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4817 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4818}
4819
d45f60c6
WAA		 4820static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4821 struct rpc_message *msg)
1da177e4 4822{
d45f60c6 4823 hdr->timestamp = jiffies;
ca857cc1
TM		 4824 if (!hdr->pgio_done_cb)
4825 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4826 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4827 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4828}
4829
d45f60c6
WAA		 4830static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4831 struct nfs_pgio_header *hdr)
ea7c3303 4832{
42e1cca7 4833 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode)->nfs_client,
d45f60c6
WAA		 4834 &hdr->args.seq_args,
4835 &hdr->res.seq_res,
9b206149 4836 task))
ef1820f9 4837 return 0;
d45f60c6
WAA		 4838 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4839 hdr->args.lock_context,
fbe77c30 4840 hdr->rw_mode) == -EIO)
ef1820f9 4841 return -EIO;
d45f60c6 4842 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4843 return -EIO;
4844 return 0;
1da177e4
LT		 4845}
4846
d45f60c6
WAA		 4847static int nfs4_write_done_cb(struct rpc_task *task,
4848 struct nfs_pgio_header *hdr)
1da177e4 4849{
d45f60c6 4850 struct inode *inode = hdr->inode;
8478eaa1 4851
d45f60c6 4852 trace_nfs4_write(hdr, task->tk_status);
9c27869d
TM		 4853 if (task->tk_status < 0) {
4854 struct nfs4_exception exception = {
4855 .inode = hdr->inode,
4856 .state = hdr->args.context->state,
4857 .stateid = &hdr->args.stateid,
4858 };
4859 task->tk_status = nfs4_async_handle_exception(task,
4860 NFS_SERVER(inode), task->tk_status,
4861 &exception);
4862 if (exception.retry) {
4863 rpc_restart_call_prepare(task);
4864 return -EAGAIN;
4865 }
1da177e4 4866 }
4f9838c7 4867 if (task->tk_status >= 0) {
d45f60c6 4868 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4869 nfs_writeback_update_inode(hdr);
4f9838c7 4870 }
788e7a89 4871 return 0;
1da177e4
LT		 4872}
4873
5521abfd 4874static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4875 struct nfs_pgio_args *args)
5521abfd
TM		 4876{
4877
4878 if (!nfs4_error_stateid_expired(task->tk_status) ||
4879 nfs4_stateid_is_current(&args->stateid,
4880 args->context,
4881 args->lock_context,
4882 FMODE_WRITE))
4883 return false;
4884 rpc_restart_call_prepare(task);
4885 return true;
4886}
4887
d45f60c6 4888static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4889{
d45f60c6 4890 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4891 return -EAGAIN;
d45f60c6 4892 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4893 return -EAGAIN;
d45f60c6
WAA		 4894 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4895 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4896}
4897
5a37f851 4898static
d45f60c6 4899bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4900{
5a37f851 4901 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4902 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4903 return false;
4904 /* Otherwise, request attributes if and only if we don't hold
4905 * a delegation
4906 */
011e2a7f 4907 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4908}
a69aef14 4909
d45f60c6
WAA		 4910static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4911 struct rpc_message *msg)
1da177e4 4912{
d45f60c6 4913 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4914
d45f60c6
WAA		 4915 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4916 hdr->args.bitmask = NULL;
4917 hdr->res.fattr = NULL;
7ffd1064 4918 } else
d45f60c6 4919 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4920
d45f60c6
WAA		 4921 if (!hdr->pgio_done_cb)
4922 hdr->pgio_done_cb = nfs4_write_done_cb;
4923 hdr->res.server = server;
4924 hdr->timestamp = jiffies;
1da177e4 4925
bdc7f021 4926 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4927 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4928}
4929
0b7c0153 4930static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4931{
42e1cca7 4932 nfs4_setup_sequence(NFS_SERVER(data->inode)->nfs_client,
d9afbd1b
TM		 4933 &data->args.seq_args,
4934 &data->res.seq_res,
4935 task);
1da177e4
LT		 4936}
4937
0b7c0153 4938static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4939{
1da177e4 4940 struct inode *inode = data->inode;
14516c3a 4941
cc668ab3 4942 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4943 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4944 NULL, NULL) == -EAGAIN) {
d00c5d43 4945 rpc_restart_call_prepare(task);
788e7a89 4946 return -EAGAIN;
1da177e4 4947 }
788e7a89 4948 return 0;
1da177e4
LT		 4949}
4950
0b7c0153 4951static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4952{
4953 if (!nfs4_sequence_done(task, &data->res.seq_res))
4954 return -EAGAIN;
0b7c0153 4955 return data->commit_done_cb(task, data);
5f452431
FI		 4956}
4957
0b7c0153 4958static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4959{
788e7a89 4960 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4961
0b7c0153
FI		 4962 if (data->commit_done_cb == NULL)
4963 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4964 data->res.server = server;
bdc7f021 4965 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4966 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4967}
4968
9bc4e3ca
CL		 4969struct nfs4_renewdata {
4970 struct nfs_client *client;
4971 unsigned long timestamp;
4972};
4973
1da177e4
LT		 4974/*
4975 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4976 * standalone procedure for queueing an asynchronous RENEW.
4977 */
9bc4e3ca 4978static void nfs4_renew_release(void *calldata)
dc96aef9 4979{
9bc4e3ca
CL		 4980 struct nfs4_renewdata *data = calldata;
4981 struct nfs_client *clp = data->client;
dc96aef9 4982
212bf41d 4983 if (refcount_read(&clp->cl_count) > 1)
0851de06
AB		 4984 nfs4_schedule_state_renewal(clp);
4985 nfs_put_client(clp);
9bc4e3ca 4986 kfree(data);
dc96aef9
AB		 4987}
4988
9bc4e3ca 4989static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4990{
9bc4e3ca
CL		 4991 struct nfs4_renewdata *data = calldata;
4992 struct nfs_client *clp = data->client;
4993 unsigned long timestamp = data->timestamp;
1da177e4 4994
c6d01c6f 4995 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4996 switch (task->tk_status) {
4997 case 0:
4998 break;
4999 case -NFS4ERR_LEASE_MOVED:
5000 nfs4_schedule_lease_moved_recovery(clp);
5001 break;
5002 default:
95baa25c 5003 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 5004 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
5005 return;
5006 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 5007 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 5008 return;
5009 }
5010 nfs4_schedule_path_down_recovery(clp);
1da177e4 5011 }
452e9352 5012 do_renew_lease(clp, timestamp);
1da177e4
LT		 5013}
5014
963d8fe5
TM		 5015static const struct rpc_call_ops nfs4_renew_ops = {
5016 .rpc_call_done = nfs4_renew_done,
dc96aef9 5017 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 5018};
5019
2f60ea6b 5020static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 5021{
5022 struct rpc_message msg = {
5023 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
5024 .rpc_argp = clp,
b4454fe1 5025 .rpc_cred = cred,
1da177e4 5026 };
9bc4e3ca 5027 struct nfs4_renewdata *data;
1da177e4 5028
2f60ea6b
TM		 5029 if (renew_flags == 0)
5030 return 0;
212bf41d 5031 if (!refcount_inc_not_zero(&clp->cl_count))
0851de06 5032 return -EIO;
b569ad34 5033 data = kmalloc(sizeof(*data), GFP_NOFS);
5c737cb2
DW		 5034 if (data == NULL) {
5035 nfs_put_client(clp);
9bc4e3ca 5036 return -ENOMEM;
5c737cb2 5037 }
9bc4e3ca
CL		 5038 data->client = clp;
5039 data->timestamp = jiffies;
bc7a05ca 5040 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 5041 &nfs4_renew_ops, data);
1da177e4
LT		 5042}
5043
8534d4ec 5044static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 5045{
5046 struct rpc_message msg = {
5047 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
5048 .rpc_argp = clp,
b4454fe1 5049 .rpc_cred = cred,
1da177e4
LT		 5050 };
5051 unsigned long now = jiffies;
5052 int status;
5053
bc7a05ca 5054 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 5055 if (status < 0)
5056 return status;
452e9352 5057 do_renew_lease(clp, now);
1da177e4
LT		 5058 return 0;
5059}
5060
aa1870af
BF		 5061static inline int nfs4_server_supports_acls(struct nfs_server *server)
5062{
7dd7d959 5063 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 5064}
5065
21f498c2
TM		 5066/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
5067 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 5068 * the stack.
5069 */
21f498c2 5070#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 5071
e9e3d724 5072static int buf_to_pages_noslab(const void *buf, size_t buflen,
8fbcf237 5073 struct page **pages)
e9e3d724
NH		 5074{
5075 struct page *newpage, **spages;
5076 int rc = 0;
5077 size_t len;
5078 spages = pages;
5079
5080 do {
21f498c2 5081 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 5082 newpage = alloc_page(GFP_KERNEL);
5083
5084 if (newpage == NULL)
5085 goto unwind;
5086 memcpy(page_address(newpage), buf, len);
d9b67e1e
AS		 5087 buf += len;
5088 buflen -= len;
e9e3d724
NH		 5089 *pages++ = newpage;
5090 rc++;
5091 } while (buflen != 0);
5092
5093 return rc;
5094
5095unwind:
5096 for(; rc > 0; rc--)
5097 __free_page(spages[rc-1]);
5098 return -ENOMEM;
5099}
5100
e50a1c2e
BF		 5101struct nfs4_cached_acl {
5102 int cached;
5103 size_t len;
3e9d4154 5104 char data[0];
e50a1c2e
BF		 5105};
5106
5107static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
5108{
5109 struct nfs_inode *nfsi = NFS_I(inode);
5110
5111 spin_lock(&inode->i_lock);
5112 kfree(nfsi->nfs4_acl);
5113 nfsi->nfs4_acl = acl;
5114 spin_unlock(&inode->i_lock);
5115}
5116
5117static void nfs4_zap_acl_attr(struct inode *inode)
5118{
5119 nfs4_set_cached_acl(inode, NULL);
5120}
5121
5122static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
5123{
5124 struct nfs_inode *nfsi = NFS_I(inode);
5125 struct nfs4_cached_acl *acl;
5126 int ret = -ENOENT;
5127
5128 spin_lock(&inode->i_lock);
5129 acl = nfsi->nfs4_acl;
5130 if (acl == NULL)
5131 goto out;
5132 if (buf == NULL) /* user is just asking for length */
5133 goto out_len;
5134 if (acl->cached == 0)
5135 goto out;
5136 ret = -ERANGE; /* see getxattr(2) man page */
5137 if (acl->len > buflen)
5138 goto out;
5139 memcpy(buf, acl->data, acl->len);
5140out_len:
5141 ret = acl->len;
5142out:
5143 spin_unlock(&inode->i_lock);
5144 return ret;
5145}
5146
5794d21e 5147static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 5148{
5149 struct nfs4_cached_acl *acl;
b291f1b1 5150 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 5151
1f1ea6c2 5152 if (buflen <= PAGE_SIZE) {
b291f1b1 5153 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 5154 if (acl == NULL)
5155 goto out;
5156 acl->cached = 1;
5794d21e 5157 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 5158 } else {
5159 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
5160 if (acl == NULL)
5161 goto out;
5162 acl->cached = 0;
5163 }
5164 acl->len = acl_len;
5165out:
5166 nfs4_set_cached_acl(inode, acl);
5167}
5168
bf118a34
AA		 5169/*
5170 * The getxattr API returns the required buffer length when called with a
5171 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
5172 * the required buf. On a NULL buf, we send a page of data to the server
5173 * guessing that the ACL request can be serviced by a page. If so, we cache
5174 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
5175 * the cache. If not so, we throw away the page, and cache the required
5176 * length. The next getxattr call will then produce another round trip to
5177 * the server, this time with the input buf of the required size.
5178 */
16b4289c 5179static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 5180{
ed92d8c1 5181 struct page *pages[NFS4ACL_MAXPAGES + 1] = {NULL, };
aa1870af
BF		 5182 struct nfs_getaclargs args = {
5183 .fh = NFS_FH(inode),
5184 .acl_pages = pages,
5185 .acl_len = buflen,
5186 };
663c79b3
BH		 5187 struct nfs_getaclres res = {
5188 .acl_len = buflen,
5189 };
aa1870af
BF		 5190 struct rpc_message msg = {
5191 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
5192 .rpc_argp = &args,
663c79b3 5193 .rpc_resp = &res,
aa1870af 5194 };
ed92d8c1 5195 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE) + 1;
21f498c2 5196 int ret = -ENOMEM, i;
aa1870af 5197
21f498c2
TM		 5198 if (npages > ARRAY_SIZE(pages))
5199 return -ERANGE;
5a006899 5200
bf118a34
AA		 5201 for (i = 0; i < npages; i++) {
5202 pages[i] = alloc_page(GFP_KERNEL);
5203 if (!pages[i])
5204 goto out_free;
e50a1c2e 5205 }
5a006899
SP		 5206
5207 /* for decoding across pages */
5208 res.acl_scratch = alloc_page(GFP_KERNEL);
5209 if (!res.acl_scratch)
5210 goto out_free;
5211
bf118a34 5212 args.acl_len = npages * PAGE_SIZE;
5a006899 5213
de040bec 5214 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 5215 __func__, buf, buflen, npages, args.acl_len);
5216 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
5217 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 5218 if (ret)
5219 goto out_free;
bf118a34 5220
1f1ea6c2
TM		 5221 /* Handle the case where the passed-in buffer is too short */
5222 if (res.acl_flags & NFS4_ACL_TRUNC) {
5223 /* Did the user only issue a request for the acl length? */
5224 if (buf == NULL)
5225 goto out_ok;
e50a1c2e 5226 ret = -ERANGE;
1f1ea6c2 5227 goto out_free;
e50a1c2e 5228 }
1f1ea6c2 5229 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 5230 if (buf) {
5231 if (res.acl_len > buflen) {
5232 ret = -ERANGE;
5233 goto out_free;
5234 }
1f1ea6c2 5235 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 5236 }
1f1ea6c2
TM		 5237out_ok:
5238 ret = res.acl_len;
e50a1c2e 5239out_free:
bf118a34
AA		 5240 for (i = 0; i < npages; i++)
5241 if (pages[i])
5242 __free_page(pages[i]);
331818f1
TM		 5243 if (res.acl_scratch)
5244 __free_page(res.acl_scratch);
aa1870af
BF		 5245 return ret;
5246}
5247
16b4289c
TM		 5248static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5249{
5250 struct nfs4_exception exception = { };
5251 ssize_t ret;
5252 do {
5253 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 5254 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 5255 if (ret >= 0)
5256 break;
5257 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
5258 } while (exception.retry);
5259 return ret;
5260}
5261
e50a1c2e
BF		 5262static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
5263{
5264 struct nfs_server *server = NFS_SERVER(inode);
5265 int ret;
5266
5267 if (!nfs4_server_supports_acls(server))
5268 return -EOPNOTSUPP;
5269 ret = nfs_revalidate_inode(server, inode);
5270 if (ret < 0)
5271 return ret;
08a22b39
AK		 5272 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
5273 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 5274 ret = nfs4_read_cached_acl(inode, buf, buflen);
5275 if (ret != -ENOENT)
bf118a34
AA		 5276 /* -ENOENT is returned if there is no ACL or if there is an ACL
5277 * but no cached acl data, just the acl length */
e50a1c2e
BF		 5278 return ret;
5279 return nfs4_get_acl_uncached(inode, buf, buflen);
5280}
5281
16b4289c 5282static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 5283{
5284 struct nfs_server *server = NFS_SERVER(inode);
5285 struct page *pages[NFS4ACL_MAXPAGES];
5286 struct nfs_setaclargs arg = {
5287 .fh = NFS_FH(inode),
5288 .acl_pages = pages,
5289 .acl_len = buflen,
5290 };
73c403a9 5291 struct nfs_setaclres res;
4b580ee3
BF		 5292 struct rpc_message msg = {
5293 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
5294 .rpc_argp = &arg,
73c403a9 5295 .rpc_resp = &res,
4b580ee3 5296 };
21f498c2 5297 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 5298 int ret, i;
4b580ee3
BF		 5299
5300 if (!nfs4_server_supports_acls(server))
5301 return -EOPNOTSUPP;
21f498c2
TM		 5302 if (npages > ARRAY_SIZE(pages))
5303 return -ERANGE;
8fbcf237 5304 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
e9e3d724
NH		 5305 if (i < 0)
5306 return i;
57ec14c5 5307 nfs4_inode_return_delegation(inode);
7c513058 5308 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 5309
5310 /*
5311 * Free each page after tx, so the only ref left is
5312 * held by the network stack
5313 */
5314 for (; i > 0; i--)
5315 put_page(pages[i-1]);
5316
08a22b39
AK		 5317 /*
5318 * Acl update can result in inode attribute update.
5319 * so mark the attribute cache invalid.
5320 */
5321 spin_lock(&inode->i_lock);
5322 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
5323 spin_unlock(&inode->i_lock);
f41f7418
TM		 5324 nfs_access_zap_cache(inode);
5325 nfs_zap_acl_cache(inode);
4b580ee3
BF		 5326 return ret;
5327}
5328
16b4289c
TM		 5329static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5330{
5331 struct nfs4_exception exception = { };
5332 int err;
5333 do {
c1578b76
TM		 5334 err = __nfs4_proc_set_acl(inode, buf, buflen);
5335 trace_nfs4_set_acl(inode, err);
5336 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 5337 &exception);
5338 } while (exception.retry);
5339 return err;
5340}
5341
aa9c2669
DQ		 5342#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5343static int _nfs4_get_security_label(struct inode *inode, void *buf,
5344 size_t buflen)
5345{
5346 struct nfs_server *server = NFS_SERVER(inode);
5347 struct nfs_fattr fattr;
5348 struct nfs4_label label = {0, 0, buflen, buf};
5349
5350 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 5351 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 5352 .fh = NFS_FH(inode),
5353 .bitmask = bitmask,
5354 };
5355 struct nfs4_getattr_res res = {
5356 .fattr = &fattr,
5357 .label = &label,
5358 .server = server,
5359 };
5360 struct rpc_message msg = {
5361 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 5362 .rpc_argp = &arg,
aa9c2669
DQ		 5363 .rpc_resp = &res,
5364 };
5365 int ret;
5366
5367 nfs_fattr_init(&fattr);
5368
fcb63a9b 5369 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 5370 if (ret)
5371 return ret;
5372 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
5373 return -ENOENT;
5374 if (buflen < label.len)
5375 return -ERANGE;
5376 return 0;
5377}
5378
5379static int nfs4_get_security_label(struct inode *inode, void *buf,
5380 size_t buflen)
5381{
5382 struct nfs4_exception exception = { };
5383 int err;
5384
5385 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5386 return -EOPNOTSUPP;
5387
5388 do {
c1578b76
TM		 5389 err = _nfs4_get_security_label(inode, buf, buflen);
5390 trace_nfs4_get_security_label(inode, err);
5391 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5392 &exception);
5393 } while (exception.retry);
5394 return err;
5395}
5396
5397static int _nfs4_do_set_security_label(struct inode *inode,
5398 struct nfs4_label *ilabel,
5399 struct nfs_fattr *fattr,
5400 struct nfs4_label *olabel)
5401{
5402
5403 struct iattr sattr = {0};
5404 struct nfs_server *server = NFS_SERVER(inode);
5405 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 5406 struct nfs_setattrargs arg = {
d9b67e1e
AS		 5407 .fh = NFS_FH(inode),
5408 .iap = &sattr,
aa9c2669
DQ		 5409 .server = server,
5410 .bitmask = bitmask,
5411 .label = ilabel,
5412 };
5413 struct nfs_setattrres res = {
5414 .fattr = fattr,
5415 .label = olabel,
5416 .server = server,
5417 };
5418 struct rpc_message msg = {
d9b67e1e
AS		 5419 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
5420 .rpc_argp = &arg,
5421 .rpc_resp = &res,
aa9c2669
DQ		 5422 };
5423 int status;
5424
12207f69 5425 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 5426
12207f69 5427 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 5428 if (status)
5429 dprintk("%s failed: %d\n", __func__, status);
5430
5431 return status;
5432}
5433
5434static int nfs4_do_set_security_label(struct inode *inode,
5435 struct nfs4_label *ilabel,
5436 struct nfs_fattr *fattr,
5437 struct nfs4_label *olabel)
5438{
5439 struct nfs4_exception exception = { };
5440 int err;
5441
5442 do {
c1578b76
TM		 5443 err = _nfs4_do_set_security_label(inode, ilabel,
5444 fattr, olabel);
5445 trace_nfs4_set_security_label(inode, err);
5446 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5447 &exception);
5448 } while (exception.retry);
5449 return err;
5450}
5451
5452static int
59301226 5453nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
aa9c2669
DQ		 5454{
5455 struct nfs4_label ilabel, *olabel = NULL;
5456 struct nfs_fattr fattr;
5457 struct rpc_cred *cred;
aa9c2669
DQ		 5458 int status;
5459
5460 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5461 return -EOPNOTSUPP;
5462
5463 nfs_fattr_init(&fattr);
5464
5465 ilabel.pi = 0;
5466 ilabel.lfs = 0;
5467 ilabel.label = (char *)buf;
5468 ilabel.len = buflen;
5469
5470 cred = rpc_lookup_cred();
5471 if (IS_ERR(cred))
5472 return PTR_ERR(cred);
5473
5474 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5475 if (IS_ERR(olabel)) {
5476 status = -PTR_ERR(olabel);
5477 goto out;
5478 }
5479
5480 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5481 if (status == 0)
5482 nfs_setsecurity(inode, &fattr, olabel);
5483
5484 nfs4_label_free(olabel);
5485out:
5486 put_rpccred(cred);
5487 return status;
5488}
5489#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5490
5491
f092075d
CL		 5492static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5493 nfs4_verifier *bootverf)
cd93710e
CL		 5494{
5495 __be32 verf[2];
5496
2c820d9a
CL		 5497 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5498 /* An impossible timestamp guarantees this value
5499 * will never match a generated boot time. */
2f86e091
DD		 5500 verf[0] = cpu_to_be32(U32_MAX);
5501 verf[1] = cpu_to_be32(U32_MAX);
2c820d9a 5502 } else {
f092075d 5503 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
2f86e091
DD		 5504 u64 ns = ktime_to_ns(nn->boot_time);
5505
5506 verf[0] = cpu_to_be32(ns >> 32);
5507 verf[1] = cpu_to_be32(ns);
2c820d9a 5508 }
cd93710e
CL		 5509 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5510}
5511
a3192688
JL		 5512static int
5513nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 5514{
a3192688
JL		 5515 size_t len;
5516 char *str;
e984a55a 5517
ceb3a16c 5518 if (clp->cl_owner_id != NULL)
a3192688 5519 return 0;
4a3e5779 5520
a3192688 5521 rcu_read_lock();
4a70316c 5522 len = 14 + strlen(clp->cl_ipaddr) + 1 +
a3192688
JL		 5523 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5524 1 +
5525 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5526 1;
5527 rcu_read_unlock();
5528
5529 if (len > NFS4_OPAQUE_LIMIT + 1)
5530 return -EINVAL;
5531
5532 /*
5533 * Since this string is allocated at mount time, and held until the
5534 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5535 * about a memory-reclaim deadlock.
5536 */
5537 str = kmalloc(len, GFP_KERNEL);
5538 if (!str)
5539 return -ENOMEM;
ceb3a16c 5540
e984a55a 5541 rcu_read_lock();
f2dd436e 5542 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
a3192688
JL		 5543 clp->cl_ipaddr,
5544 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5545 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5546 rcu_read_unlock();
a3192688 5547
a3192688
JL		 5548 clp->cl_owner_id = str;
5549 return 0;
e984a55a
CL		 5550}
5551
873e3851
JL		 5552static int
5553nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5554{
873e3851
JL		 5555 size_t len;
5556 char *str;
5557
5558 len = 10 + 10 + 1 + 10 + 1 +
5559 strlen(nfs4_client_id_uniquifier) + 1 +
5560 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5561
5562 if (len > NFS4_OPAQUE_LIMIT + 1)
5563 return -EINVAL;
5564
5565 /*
5566 * Since this string is allocated at mount time, and held until the
5567 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5568 * about a memory-reclaim deadlock.
5569 */
5570 str = kmalloc(len, GFP_KERNEL);
5571 if (!str)
5572 return -ENOMEM;
5573
f2dd436e 5574 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
873e3851
JL		 5575 clp->rpc_ops->version, clp->cl_minorversion,
5576 nfs4_client_id_uniquifier,
5577 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5578 clp->cl_owner_id = str;
5579 return 0;
5580}
5581
5582static int
5583nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5584{
873e3851
JL		 5585 size_t len;
5586 char *str;
ceb3a16c
TM		 5587
5588 if (clp->cl_owner_id != NULL)
873e3851 5589 return 0;
6f2ea7f2
CL		 5590
5591 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5592 return nfs4_init_uniquifier_client_string(clp);
5593
5594 len = 10 + 10 + 1 + 10 + 1 +
5595 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5596
5597 if (len > NFS4_OPAQUE_LIMIT + 1)
5598 return -EINVAL;
5599
5600 /*
5601 * Since this string is allocated at mount time, and held until the
5602 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5603 * about a memory-reclaim deadlock.
5604 */
5605 str = kmalloc(len, GFP_KERNEL);
5606 if (!str)
5607 return -ENOMEM;
5608
f2dd436e 5609 scnprintf(str, len, "Linux NFSv%u.%u %s",
873e3851
JL		 5610 clp->rpc_ops->version, clp->cl_minorversion,
5611 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5612 clp->cl_owner_id = str;
5613 return 0;
e984a55a
CL		 5614}
5615
706cb8db
CL		 5616/*
5617 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5618 * services. Advertise one based on the address family of the
5619 * clientaddr.
5620 */
5621static unsigned int
5622nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5623{
5624 if (strchr(clp->cl_ipaddr, ':') != NULL)
5625 return scnprintf(buf, len, "tcp6");
5626 else
5627 return scnprintf(buf, len, "tcp");
5628}
5629
f11b2a1c
JL		 5630static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5631{
5632 struct nfs4_setclientid *sc = calldata;
5633
5634 if (task->tk_status == 0)
5635 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5636}
5637
5638static const struct rpc_call_ops nfs4_setclientid_ops = {
5639 .rpc_call_done = nfs4_setclientid_done,
5640};
5641
6bbb4ae8
CL		 5642/**
5643 * nfs4_proc_setclientid - Negotiate client ID
5644 * @clp: state data structure
5645 * @program: RPC program for NFSv4 callback service
5646 * @port: IP port number for NFS4 callback service
5647 * @cred: RPC credential to use for this call
5648 * @res: where to place the result
5649 *
5650 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5651 */
bb8b27e5
TM		 5652int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5653 unsigned short port, struct rpc_cred *cred,
5654 struct nfs4_setclientid_res *res)
1da177e4
LT		 5655{
5656 nfs4_verifier sc_verifier;
5657 struct nfs4_setclientid setclientid = {
5658 .sc_verifier = &sc_verifier,
5659 .sc_prog = program,
3a6bb738 5660 .sc_clnt = clp,
1da177e4
LT		 5661 };
5662 struct rpc_message msg = {
5663 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5664 .rpc_argp = &setclientid,
bb8b27e5 5665 .rpc_resp = res,
286d7d6a 5666 .rpc_cred = cred,
1da177e4 5667 };
f11b2a1c
JL		 5668 struct rpc_task *task;
5669 struct rpc_task_setup task_setup_data = {
5670 .rpc_client = clp->cl_rpcclient,
5671 .rpc_message = &msg,
5672 .callback_ops = &nfs4_setclientid_ops,
5673 .callback_data = &setclientid,
5674 .flags = RPC_TASK_TIMEOUT,
5675 };
6bbb4ae8 5676 int status;
1da177e4 5677
de734831 5678 /* nfs_client_id4 */
f092075d 5679 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5680
5681 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5682 status = nfs4_init_uniform_client_string(clp);
5683 else
a3192688 5684 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5685
5686 if (status)
5687 goto out;
3a6bb738 5688
de734831 5689 /* cb_client4 */
706cb8db
CL		 5690 setclientid.sc_netid_len =
5691 nfs4_init_callback_netid(clp,
5692 setclientid.sc_netid,
5693 sizeof(setclientid.sc_netid));
de734831 5694 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5695 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5696 clp->cl_ipaddr, port >> 8, port & 255);
5697
3a6bb738 5698 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5699 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5700 clp->cl_owner_id);
f11b2a1c
JL		 5701 task = rpc_run_task(&task_setup_data);
5702 if (IS_ERR(task)) {
5703 status = PTR_ERR(task);
5704 goto out;
5705 }
5706 status = task->tk_status;
5707 if (setclientid.sc_cred) {
5708 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5709 put_rpccred(setclientid.sc_cred);
5710 }
5711 rpc_put_task(task);
5712out:
c6d01c6f 5713 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5714 dprintk("NFS reply setclientid: %d\n", status);
5715 return status;
1da177e4
LT		 5716}
5717
6bbb4ae8
CL		 5718/**
5719 * nfs4_proc_setclientid_confirm - Confirm client ID
5720 * @clp: state data structure
5721 * @res: result of a previous SETCLIENTID
5722 * @cred: RPC credential to use for this call
5723 *
5724 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5725 */
fd954ae1 5726int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5727 struct nfs4_setclientid_res *arg,
5728 struct rpc_cred *cred)
1da177e4 5729{
1da177e4
LT		 5730 struct rpc_message msg = {
5731 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5732 .rpc_argp = arg,
286d7d6a 5733 .rpc_cred = cred,
1da177e4 5734 };
1da177e4
LT		 5735 int status;
5736
6bbb4ae8
CL		 5737 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5738 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5739 clp->cl_clientid);
1bd714f2 5740 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5741 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5742 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5743 return status;
5744}
5745
fe650407
TM		 5746struct nfs4_delegreturndata {
5747 struct nfs4_delegreturnargs args;
fa178f29 5748 struct nfs4_delegreturnres res;
fe650407
TM		 5749 struct nfs_fh fh;
5750 nfs4_stateid stateid;
26e976a8 5751 unsigned long timestamp;
586f1c39
TM		 5752 struct {
5753 struct nfs4_layoutreturn_args arg;
5754 struct nfs4_layoutreturn_res res;
4d796d75 5755 struct nfs4_xdr_opaque_data ld_private;
586f1c39
TM		 5756 u32 roc_barrier;
5757 bool roc;
5758 } lr;
fa178f29 5759 struct nfs_fattr fattr;
fe650407 5760 int rpc_status;
039b756a 5761 struct inode *inode;
fe650407
TM		 5762};
5763
fe650407
TM		 5764static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5765{
5766 struct nfs4_delegreturndata *data = calldata;
938e1010 5767
14516c3a
TM		 5768 if (!nfs4_sequence_done(task, &data->res.seq_res))
5769 return;
938e1010 5770
ca8acf8d 5771 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
586f1c39
TM		 5772
5773 /* Handle Layoutreturn errors */
5774 if (data->args.lr_args && task->tk_status != 0) {
5775 switch(data->res.lr_ret) {
5776 default:
5777 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
5778 break;
5779 case 0:
5780 data->args.lr_args = NULL;
5781 data->res.lr_res = NULL;
5782 break;
7380020e
TM		 5783 case -NFS4ERR_OLD_STATEID:
5784 if (nfs4_refresh_layout_stateid(&data->args.lr_args->stateid,
140087fd
TM		 5785 data->inode))
5786 goto lr_restart;
7380020e 5787 /* Fallthrough */
586f1c39
TM		 5788 case -NFS4ERR_ADMIN_REVOKED:
5789 case -NFS4ERR_DELEG_REVOKED:
5790 case -NFS4ERR_EXPIRED:
5791 case -NFS4ERR_BAD_STATEID:
586f1c39
TM		 5792 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
5793 case -NFS4ERR_WRONG_CRED:
5794 data->args.lr_args = NULL;
5795 data->res.lr_res = NULL;
140087fd 5796 goto lr_restart;
586f1c39
TM		 5797 }
5798 }
5799
79708861 5800 switch (task->tk_status) {
79708861 5801 case 0:
fa178f29 5802 renew_lease(data->res.server, data->timestamp);
23ea44c2 5803 break;
c97cf606
TM		 5804 case -NFS4ERR_ADMIN_REVOKED:
5805 case -NFS4ERR_DELEG_REVOKED:
26d36301
TM		 5806 case -NFS4ERR_EXPIRED:
5807 nfs4_free_revoked_stateid(data->res.server,
5808 data->args.stateid,
5809 task->tk_msg.rpc_cred);
12f275cd 5810 /* Fallthrough */
c97cf606 5811 case -NFS4ERR_BAD_STATEID:
c97cf606 5812 case -NFS4ERR_STALE_STATEID:
c97cf606
TM		 5813 task->tk_status = 0;
5814 break;
12f275cd 5815 case -NFS4ERR_OLD_STATEID:
140087fd
TM		 5816 if (nfs4_refresh_delegation_stateid(&data->stateid, data->inode))
5817 goto out_restart;
12f275cd
TM		 5818 task->tk_status = 0;
5819 break;
8ac2b422
TM		 5820 case -NFS4ERR_ACCESS:
5821 if (data->args.bitmask) {
5822 data->args.bitmask = NULL;
5823 data->res.fattr = NULL;
140087fd 5824 goto out_restart;
8ac2b422 5825 }
140087fd 5826 /* Fallthrough */
79708861 5827 default:
8478eaa1
N		 5828 if (nfs4_async_handle_error(task, data->res.server,
5829 NULL, NULL) == -EAGAIN) {
140087fd 5830 goto out_restart;
79708861
RL		 5831 }
5832 }
5833 data->rpc_status = task->tk_status;
140087fd
TM		 5834 return;
5835lr_restart:
5836 data->res.lr_ret = 0;
5837out_restart:
5838 task->tk_status = 0;
5839 rpc_restart_call_prepare(task);
fe650407
TM		 5840}
5841
5842static void nfs4_delegreturn_release(void *calldata)
5843{
039b756a 5844 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5845 struct inode *inode = data->inode;
039b756a 5846
ea7c38fe 5847 if (inode) {
586f1c39 5848 if (data->lr.roc)
1c5bd76d
TM		 5849 pnfs_roc_release(&data->lr.arg, &data->lr.res,
5850 data->res.lr_ret);
0bc2c9b4 5851 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
ea7c38fe
TM		 5852 nfs_iput_and_deactive(inode);
5853 }
fe650407
TM		 5854 kfree(calldata);
5855}
5856
938e1010
AA		 5857static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5858{
5859 struct nfs4_delegreturndata *d_data;
5860
5861 d_data = (struct nfs4_delegreturndata *)data;
5862
1c5bd76d 5863 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task))
500d701f
PT		 5864 return;
5865
42e1cca7 5866 nfs4_setup_sequence(d_data->res.server->nfs_client,
d9afbd1b
TM		 5867 &d_data->args.seq_args,
5868 &d_data->res.seq_res,
5869 task);
938e1010 5870}
938e1010 5871
c8d149f3 5872static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5873 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5874 .rpc_call_done = nfs4_delegreturn_done,
5875 .rpc_release = nfs4_delegreturn_release,
5876};
5877
e6f81075 5878static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5879{
5880 struct nfs4_delegreturndata *data;
fa178f29 5881 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5882 struct rpc_task *task;
5138fde0
TM		 5883 struct rpc_message msg = {
5884 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5885 .rpc_cred = cred,
5886 };
c970aa85
TM		 5887 struct rpc_task_setup task_setup_data = {
5888 .rpc_client = server->client,
5138fde0 5889 .rpc_message = &msg,
c970aa85
TM		 5890 .callback_ops = &nfs4_delegreturn_ops,
5891 .flags = RPC_TASK_ASYNC,
5892 };
e6f81075 5893 int status = 0;
fe650407 5894
8535b2be 5895 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5896 if (data == NULL)
5897 return -ENOMEM;
a9c92d6b 5898 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
99ade3c7
AE		 5899
5900 nfs4_state_protect(server->nfs_client,
5901 NFS_SP4_MACH_CRED_CLEANUP,
5902 &task_setup_data.rpc_client, &msg);
5903
fe650407
TM		 5904 data->args.fhandle = &data->fh;
5905 data->args.stateid = &data->stateid;
9e907fec 5906 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5907 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5908 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5909 data->res.fattr = &data->fattr;
5910 data->res.server = server;
586f1c39 5911 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
4d796d75 5912 data->lr.arg.ld_private = &data->lr.ld_private;
5138fde0 5913 nfs_fattr_init(data->res.fattr);
26e976a8 5914 data->timestamp = jiffies;
fe650407 5915 data->rpc_status = 0;
53e6fc86 5916 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, cred);
ea7c38fe 5917 data->inode = nfs_igrab_and_active(inode);
1c5bd76d 5918 if (data->inode) {
1c5bd76d
TM		 5919 if (data->lr.roc) {
5920 data->args.lr_args = &data->lr.arg;
5921 data->res.lr_res = &data->lr.res;
5922 }
53e6fc86
TM		 5923 } else if (data->lr.roc) {
5924 pnfs_roc_release(&data->lr.arg, &data->lr.res, 0);
5925 data->lr.roc = false;
1c5bd76d 5926 }
fe650407 5927
c970aa85 5928 task_setup_data.callback_data = data;
1174dd1f
TM		 5929 msg.rpc_argp = &data->args;
5930 msg.rpc_resp = &data->res;
c970aa85 5931 task = rpc_run_task(&task_setup_data);
7a1218a2 5932 if (IS_ERR(task))
fe650407 5933 return PTR_ERR(task);
e6f81075
TM		 5934 if (!issync)
5935 goto out;
820bf85c 5936 status = rpc_wait_for_completion_task(task);
e6f81075
TM		 5937 if (status != 0)
5938 goto out;
5939 status = data->rpc_status;
e6f81075 5940out:
e6b3c4db 5941 rpc_put_task(task);
fe650407 5942 return status;
1da177e4
LT		 5943}
5944
e6f81075 5945int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5946{
5947 struct nfs_server *server = NFS_SERVER(inode);
5948 struct nfs4_exception exception = { };
5949 int err;
5950 do {
e6f81075 5951 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
48c9579a 5952 trace_nfs4_delegreturn(inode, stateid, err);
1da177e4
LT		 5953 switch (err) {
5954 case -NFS4ERR_STALE_STATEID:
5955 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5956 case 0:
5957 return 0;
5958 }
5959 err = nfs4_handle_exception(server, err, &exception);
5960 } while (exception.retry);
5961 return err;
5962}
5963
1da177e4
LT		 5964static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5965{
5966 struct inode *inode = state->inode;
5967 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5968 struct nfs_client *clp = server->nfs_client;
911d1aaf 5969 struct nfs_lockt_args arg = {
1da177e4 5970 .fh = NFS_FH(inode),
911d1aaf 5971 .fl = request,
1da177e4 5972 };
911d1aaf
TM		 5973 struct nfs_lockt_res res = {
5974 .denied = request,
1da177e4
LT		 5975 };
5976 struct rpc_message msg = {
5977 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
d9b67e1e
AS		 5978 .rpc_argp = &arg,
5979 .rpc_resp = &res,
1da177e4
LT		 5980 .rpc_cred = state->owner->so_cred,
5981 };
1da177e4
LT		 5982 struct nfs4_lock_state *lsp;
5983 int status;
5984
911d1aaf 5985 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5986 status = nfs4_set_lock_state(state, request);
5987 if (status != 0)
5988 goto out;
5989 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5990 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5991 arg.lock_owner.s_dev = server->s_dev;
7c513058 5992 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5993 switch (status) {
5994 case 0:
5995 request->fl_type = F_UNLCK;
5996 break;
5997 case -NFS4ERR_DENIED:
5998 status = 0;
1da177e4 5999 }
70cc6487 6000 request->fl_ops->fl_release_private(request);
a6f951dd 6001 request->fl_ops = NULL;
8d0a8a9d 6002out:
1da177e4
LT		 6003 return status;
6004}
6005
6006static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6007{
6008 struct nfs4_exception exception = { };
6009 int err;
6010
6011 do {
d1b748a5
TM		 6012 err = _nfs4_proc_getlk(state, cmd, request);
6013 trace_nfs4_get_lock(request, state, cmd, err);
6014 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 6015 &exception);
6016 } while (exception.retry);
6017 return err;
6018}
6019
faf5f49c 6020struct nfs4_unlockdata {
911d1aaf
TM		 6021 struct nfs_locku_args arg;
6022 struct nfs_locku_res res;
faf5f49c
TM		 6023 struct nfs4_lock_state *lsp;
6024 struct nfs_open_context *ctx;
f30cb757 6025 struct nfs_lock_context *l_ctx;
911d1aaf 6026 struct file_lock fl;
516285eb 6027 struct nfs_server *server;
26e976a8 6028 unsigned long timestamp;
faf5f49c
TM		 6029};
6030
911d1aaf
TM		 6031static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
6032 struct nfs_open_context *ctx,
6033 struct nfs4_lock_state *lsp,
6034 struct nfs_seqid *seqid)
6035{
6036 struct nfs4_unlockdata *p;
6037 struct inode *inode = lsp->ls_state->inode;
6038
8535b2be 6039 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 6040 if (p == NULL)
6041 return NULL;
6042 p->arg.fh = NFS_FH(inode);
6043 p->arg.fl = &p->fl;
6044 p->arg.seqid = seqid;
c1d51931 6045 p->res.seqid = seqid;
911d1aaf 6046 p->lsp = lsp;
194bc1f4 6047 refcount_inc(&lsp->ls_count);
911d1aaf
TM		 6048 /* Ensure we don't close file until we're done freeing locks! */
6049 p->ctx = get_nfs_open_context(ctx);
f30cb757 6050 p->l_ctx = nfs_get_lock_context(ctx);
911d1aaf
TM		 6051 memcpy(&p->fl, fl, sizeof(p->fl));
6052 p->server = NFS_SERVER(inode);
6053 return p;
6054}
6055
06f814a3 6056static void nfs4_locku_release_calldata(void *data)
faf5f49c 6057{
963d8fe5 6058 struct nfs4_unlockdata *calldata = data;
911d1aaf 6059 nfs_free_seqid(calldata->arg.seqid);
06f814a3 6060 nfs4_put_lock_state(calldata->lsp);
f30cb757 6061 nfs_put_lock_context(calldata->l_ctx);
06f814a3
TM		 6062 put_nfs_open_context(calldata->ctx);
6063 kfree(calldata);
faf5f49c
TM		 6064}
6065
963d8fe5 6066static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 6067{
963d8fe5 6068 struct nfs4_unlockdata *calldata = data;
faf5f49c 6069
14516c3a
TM		 6070 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
6071 return;
faf5f49c
TM		 6072 switch (task->tk_status) {
6073 case 0:
26e976a8 6074 renew_lease(calldata->server, calldata->timestamp);
75575ddf 6075 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 6076 if (nfs4_update_lock_stateid(calldata->lsp,
6077 &calldata->res.stateid))
6078 break;
26d36301
TM		 6079 case -NFS4ERR_ADMIN_REVOKED:
6080 case -NFS4ERR_EXPIRED:
6081 nfs4_free_revoked_stateid(calldata->server,
6082 &calldata->arg.stateid,
6083 task->tk_msg.rpc_cred);
9e33bed5
TM		 6084 case -NFS4ERR_BAD_STATEID:
6085 case -NFS4ERR_OLD_STATEID:
faf5f49c 6086 case -NFS4ERR_STALE_STATEID:
425c1d4e
TM		 6087 if (!nfs4_stateid_match(&calldata->arg.stateid,
6088 &calldata->lsp->ls_stateid))
6089 rpc_restart_call_prepare(task);
faf5f49c
TM		 6090 break;
6091 default:
8478eaa1
N		 6092 if (nfs4_async_handle_error(task, calldata->server,
6093 NULL, NULL) == -EAGAIN)
d00c5d43 6094 rpc_restart_call_prepare(task);
faf5f49c 6095 }
2b1bc308 6096 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 6097}
6098
4ce70ada 6099static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 6100{
4ce70ada 6101 struct nfs4_unlockdata *calldata = data;
faf5f49c 6102
f30cb757
BC		 6103 if (test_bit(NFS_CONTEXT_UNLOCK, &calldata->l_ctx->open_context->flags) &&
6104 nfs_async_iocounter_wait(task, calldata->l_ctx))
6105 return;
6106
911d1aaf 6107 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 6108 goto out_wait;
425c1d4e 6109 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 6110 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 6111 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 6112 goto out_no_action;
faf5f49c 6113 }
26e976a8 6114 calldata->timestamp = jiffies;
42e1cca7 6115 if (nfs4_setup_sequence(calldata->server->nfs_client,
a893693c 6116 &calldata->arg.seq_args,
2240a9e2
TM		 6117 &calldata->res.seq_res,
6118 task) != 0)
6119 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 6120 return;
6121out_no_action:
6122 task->tk_action = NULL;
6123out_wait:
6124 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 6125}
6126
963d8fe5 6127static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 6128 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 6129 .rpc_call_done = nfs4_locku_done,
06f814a3 6130 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 6131};
6132
a5d16a4d
TM		 6133static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
6134 struct nfs_open_context *ctx,
6135 struct nfs4_lock_state *lsp,
6136 struct nfs_seqid *seqid)
6137{
6138 struct nfs4_unlockdata *data;
5138fde0
TM		 6139 struct rpc_message msg = {
6140 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
6141 .rpc_cred = ctx->cred,
6142 };
c970aa85
TM		 6143 struct rpc_task_setup task_setup_data = {
6144 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 6145 .rpc_message = &msg,
c970aa85 6146 .callback_ops = &nfs4_locku_ops,
101070ca 6147 .workqueue = nfsiod_workqueue,
c970aa85
TM		 6148 .flags = RPC_TASK_ASYNC,
6149 };
a5d16a4d 6150
fa940720
WAA		 6151 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
6152 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
6153
137d6aca
FF		 6154 /* Ensure this is an unlock - when canceling a lock, the
6155 * canceled lock is passed in, and it won't be an unlock.
6156 */
6157 fl->fl_type = F_UNLCK;
f30cb757
BC		 6158 if (fl->fl_flags & FL_CLOSE)
6159 set_bit(NFS_CONTEXT_UNLOCK, &ctx->flags);
137d6aca 6160
a5d16a4d
TM		 6161 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
6162 if (data == NULL) {
6163 nfs_free_seqid(seqid);
6164 return ERR_PTR(-ENOMEM);
6165 }
6166
a9c92d6b 6167 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 6168 msg.rpc_argp = &data->arg;
6169 msg.rpc_resp = &data->res;
c970aa85
TM		 6170 task_setup_data.callback_data = data;
6171 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 6172}
6173
faf5f49c
TM		 6174static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
6175{
65b62a29
TM		 6176 struct inode *inode = state->inode;
6177 struct nfs4_state_owner *sp = state->owner;
6178 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 6179 struct nfs_seqid *seqid;
1da177e4 6180 struct nfs4_lock_state *lsp;
06f814a3 6181 struct rpc_task *task;
b4019c0e 6182 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 6183 int status = 0;
536ff0f8 6184 unsigned char fl_flags = request->fl_flags;
faf5f49c 6185
8d0a8a9d 6186 status = nfs4_set_lock_state(state, request);
9b073574
TM		 6187 /* Unlock _before_ we do the RPC call */
6188 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 6189 /* Exclude nfs_delegation_claim_locks() */
6190 mutex_lock(&sp->so_delegreturn_mutex);
6191 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 6192 down_read(&nfsi->rwsem);
75575ddf 6193 if (locks_lock_inode_wait(inode, request) == -ENOENT) {
19e03c57 6194 up_read(&nfsi->rwsem);
65b62a29 6195 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 6196 goto out;
19e03c57
TM		 6197 }
6198 up_read(&nfsi->rwsem);
65b62a29 6199 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 6200 if (status != 0)
9b073574
TM		 6201 goto out;
6202 /* Is this a delegated lock? */
8d0a8a9d 6203 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 6204 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
6205 goto out;
b4019c0e
TM		 6206 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
6207 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 6208 status = -ENOMEM;
badc76dd 6209 if (IS_ERR(seqid))
9b073574 6210 goto out;
cd3758e3 6211 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 6212 status = PTR_ERR(task);
6213 if (IS_ERR(task))
9b073574 6214 goto out;
820bf85c 6215 status = rpc_wait_for_completion_task(task);
e6b3c4db 6216 rpc_put_task(task);
9b073574 6217out:
536ff0f8 6218 request->fl_flags = fl_flags;
d1b748a5 6219 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 6220 return status;
6221}
6222
a5d16a4d
TM		 6223struct nfs4_lockdata {
6224 struct nfs_lock_args arg;
6225 struct nfs_lock_res res;
6226 struct nfs4_lock_state *lsp;
6227 struct nfs_open_context *ctx;
6228 struct file_lock fl;
26e976a8 6229 unsigned long timestamp;
a5d16a4d
TM		 6230 int rpc_status;
6231 int cancelled;
66179efe 6232 struct nfs_server *server;
a5d16a4d
TM		 6233};
6234
6235static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 6236 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
6237 gfp_t gfp_mask)
1da177e4 6238{
a5d16a4d
TM		 6239 struct nfs4_lockdata *p;
6240 struct inode *inode = lsp->ls_state->inode;
1da177e4 6241 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 6242 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 6243
8535b2be 6244 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 6245 if (p == NULL)
6246 return NULL;
6247
6248 p->arg.fh = NFS_FH(inode);
6249 p->arg.fl = &p->fl;
8535b2be 6250 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 6251 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 6252 goto out_free;
b4019c0e
TM		 6253 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
6254 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 6255 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 6256 goto out_free_seqid;
7539bbab 6257 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 6258 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 6259 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 6260 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 6261 p->lsp = lsp;
66179efe 6262 p->server = server;
194bc1f4 6263 refcount_inc(&lsp->ls_count);
a5d16a4d
TM		 6264 p->ctx = get_nfs_open_context(ctx);
6265 memcpy(&p->fl, fl, sizeof(p->fl));
6266 return p;
2f74c0a0
TM		 6267out_free_seqid:
6268 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 6269out_free:
6270 kfree(p);
6271 return NULL;
6272}
6273
6274static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
6275{
6276 struct nfs4_lockdata *data = calldata;
6277 struct nfs4_state *state = data->lsp->ls_state;
06735b34 6278
3110ff80 6279 dprintk("%s: begin!\n", __func__);
2f74c0a0 6280 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 6281 goto out_wait;
a5d16a4d 6282 /* Do we need to do an open_to_lock_owner? */
6b447539 6283 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 6284 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 6285 goto out_release_lock_seqid;
8fe72bac 6286 }
425c1d4e
TM		 6287 nfs4_stateid_copy(&data->arg.open_stateid,
6288 &state->open_stateid);
a5d16a4d 6289 data->arg.new_lock_owner = 1;
c1d51931 6290 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 6291 } else {
2f74c0a0 6292 data->arg.new_lock_owner = 0;
425c1d4e
TM		 6293 nfs4_stateid_copy(&data->arg.lock_stateid,
6294 &data->lsp->ls_stateid);
6295 }
5d422301
TM		 6296 if (!nfs4_valid_open_stateid(state)) {
6297 data->rpc_status = -EBADF;
6298 task->tk_action = NULL;
6299 goto out_release_open_seqid;
6300 }
26e976a8 6301 data->timestamp = jiffies;
42e1cca7 6302 if (nfs4_setup_sequence(data->server->nfs_client,
035168ab 6303 &data->arg.seq_args,
2240a9e2 6304 &data->res.seq_res,
d9afbd1b 6305 task) == 0)
66179efe 6306 return;
5d422301 6307out_release_open_seqid:
2240a9e2
TM		 6308 nfs_release_seqid(data->arg.open_seqid);
6309out_release_lock_seqid:
6310 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 6311out_wait:
6312 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 6313 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 6314}
6315
a5d16a4d
TM		 6316static void nfs4_lock_done(struct rpc_task *task, void *calldata)
6317{
6318 struct nfs4_lockdata *data = calldata;
39071e6f 6319 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 6320
3110ff80 6321 dprintk("%s: begin!\n", __func__);
a5d16a4d 6322
14516c3a
TM		 6323 if (!nfs4_sequence_done(task, &data->res.seq_res))
6324 return;
66179efe 6325
a5d16a4d 6326 data->rpc_status = task->tk_status;
425c1d4e
TM		 6327 switch (task->tk_status) {
6328 case 0:
2b0143b5 6329 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 6330 data->timestamp);
c69899a1
TM		 6331 if (data->arg.new_lock) {
6332 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
75575ddf 6333 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) {
c69899a1
TM		 6334 rpc_restart_call_prepare(task);
6335 break;
6336 }
6337 }
39071e6f
TM		 6338 if (data->arg.new_lock_owner != 0) {
6339 nfs_confirm_seqid(&lsp->ls_seqid, 0);
6340 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
6341 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6342 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
6343 rpc_restart_call_prepare(task);
425c1d4e
TM		 6344 break;
6345 case -NFS4ERR_BAD_STATEID:
6346 case -NFS4ERR_OLD_STATEID:
6347 case -NFS4ERR_STALE_STATEID:
6348 case -NFS4ERR_EXPIRED:
6349 if (data->arg.new_lock_owner != 0) {
6350 if (!nfs4_stateid_match(&data->arg.open_stateid,
6351 &lsp->ls_state->open_stateid))
6352 rpc_restart_call_prepare(task);
6353 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
6354 &lsp->ls_stateid))
6355 rpc_restart_call_prepare(task);
a5d16a4d 6356 }
3110ff80 6357 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 6358}
6359
6360static void nfs4_lock_release(void *calldata)
6361{
6362 struct nfs4_lockdata *data = calldata;
6363
3110ff80 6364 dprintk("%s: begin!\n", __func__);
2f74c0a0 6365 nfs_free_seqid(data->arg.open_seqid);
a7a3b1e9 6366 if (data->cancelled) {
a5d16a4d
TM		 6367 struct rpc_task *task;
6368 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
6369 data->arg.lock_seqid);
6370 if (!IS_ERR(task))
bf294b41 6371 rpc_put_task_async(task);
3110ff80 6372 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 6373 } else
6374 nfs_free_seqid(data->arg.lock_seqid);
6375 nfs4_put_lock_state(data->lsp);
6376 put_nfs_open_context(data->ctx);
6377 kfree(data);
3110ff80 6378 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 6379}
6380
6381static const struct rpc_call_ops nfs4_lock_ops = {
6382 .rpc_call_prepare = nfs4_lock_prepare,
6383 .rpc_call_done = nfs4_lock_done,
6384 .rpc_release = nfs4_lock_release,
6385};
6386
2bee72a6
TM		 6387static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
6388{
2bee72a6
TM		 6389 switch (error) {
6390 case -NFS4ERR_ADMIN_REVOKED:
d7f3e4bf 6391 case -NFS4ERR_EXPIRED:
2bee72a6 6392 case -NFS4ERR_BAD_STATEID:
ecac799a 6393 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 6394 if (new_lock_owner != 0 ||
795a88c9 6395 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 6396 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 6397 break;
6398 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 6399 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a 6400 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 6401 };
6402}
6403
afe6c27c 6404static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 6405{
6406 struct nfs4_lockdata *data;
6407 struct rpc_task *task;
5138fde0
TM		 6408 struct rpc_message msg = {
6409 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
6410 .rpc_cred = state->owner->so_cred,
6411 };
c970aa85
TM		 6412 struct rpc_task_setup task_setup_data = {
6413 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 6414 .rpc_message = &msg,
c970aa85 6415 .callback_ops = &nfs4_lock_ops,
101070ca 6416 .workqueue = nfsiod_workqueue,
c970aa85
TM		 6417 .flags = RPC_TASK_ASYNC,
6418 };
a5d16a4d
TM		 6419 int ret;
6420
3110ff80 6421 dprintk("%s: begin!\n", __func__);
cd3758e3 6422 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 6423 fl->fl_u.nfs4_fl.owner,
6424 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 6425 if (data == NULL)
6426 return -ENOMEM;
6427 if (IS_SETLKW(cmd))
6428 data->arg.block = 1;
a9c92d6b 6429 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 6430 msg.rpc_argp = &data->arg;
6431 msg.rpc_resp = &data->res;
c970aa85 6432 task_setup_data.callback_data = data;
8fe72bac
TM		 6433 if (recovery_type > NFS_LOCK_NEW) {
6434 if (recovery_type == NFS_LOCK_RECLAIM)
6435 data->arg.reclaim = NFS_LOCK_RECLAIM;
6436 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 6437 } else
6438 data->arg.new_lock = 1;
c970aa85 6439 task = rpc_run_task(&task_setup_data);
7a1218a2 6440 if (IS_ERR(task))
a5d16a4d 6441 return PTR_ERR(task);
820bf85c 6442 ret = rpc_wait_for_completion_task(task);
a5d16a4d
TM		 6443 if (ret == 0) {
6444 ret = data->rpc_status;
2bee72a6
TM		 6445 if (ret)
6446 nfs4_handle_setlk_error(data->server, data->lsp,
6447 data->arg.new_lock_owner, ret);
a5d16a4d 6448 } else
a7a3b1e9 6449 data->cancelled = true;
e6b3c4db 6450 rpc_put_task(task);
3110ff80 6451 dprintk("%s: done, ret = %d!\n", __func__, ret);
48c9579a 6452 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
a5d16a4d 6453 return ret;
1da177e4
LT		 6454}
6455
6456static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
6457{
202b50dc 6458 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6459 struct nfs4_exception exception = {
6460 .inode = state->inode,
6461 };
202b50dc
TM		 6462 int err;
6463
6464 do {
42a2d13e
TM		 6465 /* Cache the lock if possible... */
6466 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6467 return 0;
afe6c27c 6468 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 6469 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 6470 break;
6471 nfs4_handle_exception(server, err, &exception);
6472 } while (exception.retry);
6473 return err;
1da177e4
LT		 6474}
6475
6476static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
6477{
202b50dc 6478 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6479 struct nfs4_exception exception = {
6480 .inode = state->inode,
6481 };
202b50dc
TM		 6482 int err;
6483
6bfc93ef
TM		 6484 err = nfs4_set_lock_state(state, request);
6485 if (err != 0)
6486 return err;
f6de7a39 6487 if (!recover_lost_locks) {
ef1820f9
N		 6488 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
6489 return 0;
6490 }
202b50dc 6491 do {
42a2d13e
TM		 6492 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6493 return 0;
afe6c27c 6494 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 6495 switch (err) {
6496 default:
6497 goto out;
6498 case -NFS4ERR_GRACE:
6499 case -NFS4ERR_DELAY:
6500 nfs4_handle_exception(server, err, &exception);
6501 err = 0;
6502 }
202b50dc 6503 } while (exception.retry);
a9ed2e25 6504out:
202b50dc 6505 return err;
1da177e4
LT		 6506}
6507
f062eb6c 6508#if defined(CONFIG_NFS_V4_1)
b01dd1d8
BS		 6509static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6510{
c5896fc8
TM		 6511 struct nfs4_lock_state *lsp;
6512 int status;
b01dd1d8 6513
c5896fc8
TM		 6514 status = nfs4_set_lock_state(state, request);
6515 if (status != 0)
6516 return status;
6517 lsp = request->fl_u.nfs4_fl.owner;
6518 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) ||
6519 test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
6520 return 0;
81b68de4 6521 return nfs4_lock_expired(state, request);
f062eb6c
BS		 6522}
6523#endif
6524
1da177e4
LT		 6525static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6526{
19e03c57 6527 struct nfs_inode *nfsi = NFS_I(state->inode);
11476e9d 6528 struct nfs4_state_owner *sp = state->owner;
01c3b861 6529 unsigned char fl_flags = request->fl_flags;
1ea67dbd 6530 int status;
1da177e4 6531
01c3b861 6532 request->fl_flags |= FL_ACCESS;
75575ddf 6533 status = locks_lock_inode_wait(state->inode, request);
01c3b861
TM		 6534 if (status < 0)
6535 goto out;
11476e9d 6536 mutex_lock(&sp->so_delegreturn_mutex);
19e03c57 6537 down_read(&nfsi->rwsem);
01c3b861 6538 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6539 /* Yes: cache locks! */
01c3b861 6540 /* ...but avoid races with delegation recall... */
19e03c57 6541 request->fl_flags = fl_flags & ~FL_SLEEP;
75575ddf 6542 status = locks_lock_inode_wait(state->inode, request);
c69899a1 6543 up_read(&nfsi->rwsem);
11476e9d 6544 mutex_unlock(&sp->so_delegreturn_mutex);
9a99af49 6545 goto out;
9a99af49 6546 }
19e03c57 6547 up_read(&nfsi->rwsem);
11476e9d 6548 mutex_unlock(&sp->so_delegreturn_mutex);
c69899a1 6549 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6550out:
6551 request->fl_flags = fl_flags;
1da177e4
LT		 6552 return status;
6553}
6554
6555static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6556{
a1d0b5ee
TM		 6557 struct nfs4_exception exception = {
6558 .state = state,
05ffe24f 6559 .inode = state->inode,
a1d0b5ee 6560 };
1da177e4
LT		 6561 int err;
6562
6563 do {
965b5d67
TM		 6564 err = _nfs4_proc_setlk(state, cmd, request);
6565 if (err == -NFS4ERR_DENIED)
6566 err = -EAGAIN;
1da177e4 6567 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6568 err, &exception);
1da177e4
LT		 6569 } while (exception.retry);
6570 return err;
6571}
6572
d2f3a7f9
JL		 6573#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
6574#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
6575
6576static int
a1d617d8
JL		 6577nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd,
6578 struct file_lock *request)
d2f3a7f9
JL		 6579{
6580 int status = -ERESTARTSYS;
6581 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6582
6583 while(!signalled()) {
6584 status = nfs4_proc_setlk(state, cmd, request);
6585 if ((status != -EAGAIN) || IS_SETLK(cmd))
6586 break;
6587 freezable_schedule_timeout_interruptible(timeout);
6588 timeout *= 2;
6589 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout);
6590 status = -ERESTARTSYS;
6591 }
6592 return status;
6593}
6594
a1d617d8
JL		 6595#ifdef CONFIG_NFS_V4_1
6596struct nfs4_lock_waiter {
6597 struct task_struct *task;
6598 struct inode *inode;
6599 struct nfs_lowner *owner;
6600 bool notified;
6601};
6602
6603static int
ac6424b9 6604nfs4_wake_lock_waiter(wait_queue_entry_t *wait, unsigned int mode, int flags, void *key)
a1d617d8
JL		 6605{
6606 int ret;
6607 struct cb_notify_lock_args *cbnl = key;
6608 struct nfs4_lock_waiter *waiter = wait->private;
6609 struct nfs_lowner *lowner = &cbnl->cbnl_owner,
6610 *wowner = waiter->owner;
6611
6612 /* Only wake if the callback was for the same owner */
6613 if (lowner->clientid != wowner->clientid ||
6614 lowner->id != wowner->id ||
6615 lowner->s_dev != wowner->s_dev)
6616 return 0;
6617
6618 /* Make sure it's for the right inode */
6619 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
6620 return 0;
6621
6622 waiter->notified = true;
6623
6624 /* override "private" so we can use default_wake_function */
6625 wait->private = waiter->task;
6626 ret = autoremove_wake_function(wait, mode, flags, key);
6627 wait->private = waiter;
6628 return ret;
6629}
6630
6631static int
6632nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6633{
6634 int status = -ERESTARTSYS;
6635 unsigned long flags;
6636 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
6637 struct nfs_server *server = NFS_SERVER(state->inode);
6638 struct nfs_client *clp = server->nfs_client;
6639 wait_queue_head_t *q = &clp->cl_lock_waitq;
6640 struct nfs_lowner owner = { .clientid = clp->cl_clientid,
6641 .id = lsp->ls_seqid.owner_id,
6642 .s_dev = server->s_dev };
6643 struct nfs4_lock_waiter waiter = { .task = current,
6644 .inode = state->inode,
6645 .owner = &owner,
6646 .notified = false };
ac6424b9 6647 wait_queue_entry_t wait;
a1d617d8
JL		 6648
6649 /* Don't bother with waitqueue if we don't expect a callback */
6650 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags))
6651 return nfs4_retry_setlk_simple(state, cmd, request);
6652
6653 init_wait(&wait);
6654 wait.private = &waiter;
6655 wait.func = nfs4_wake_lock_waiter;
6656 add_wait_queue(q, &wait);
6657
6658 while(!signalled()) {
6659 status = nfs4_proc_setlk(state, cmd, request);
6660 if ((status != -EAGAIN) || IS_SETLK(cmd))
6661 break;
6662
6663 status = -ERESTARTSYS;
6664 spin_lock_irqsave(&q->lock, flags);
6665 if (waiter.notified) {
6666 spin_unlock_irqrestore(&q->lock, flags);
6667 continue;
6668 }
6669 set_current_state(TASK_INTERRUPTIBLE);
6670 spin_unlock_irqrestore(&q->lock, flags);
6671
b7dbcc0e 6672 freezable_schedule_timeout(NFS4_LOCK_MAXTIMEOUT);
a1d617d8
JL		 6673 }
6674
6675 finish_wait(q, &wait);
6676 return status;
6677}
6678#else /* !CONFIG_NFS_V4_1 */
6679static inline int
6680nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6681{
6682 return nfs4_retry_setlk_simple(state, cmd, request);
6683}
6684#endif
6685
1da177e4
LT		 6686static int
6687nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6688{
6689 struct nfs_open_context *ctx;
6690 struct nfs4_state *state;
1da177e4
LT		 6691 int status;
6692
6693 /* verify open state */
cd3758e3 6694 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6695 state = ctx->state;
6696
d953126a
TM		 6697 if (IS_GETLK(cmd)) {
6698 if (state != NULL)
6699 return nfs4_proc_getlk(state, F_GETLK, request);
6700 return 0;
6701 }
1da177e4
LT		 6702
6703 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6704 return -EINVAL;
6705
d953126a
TM		 6706 if (request->fl_type == F_UNLCK) {
6707 if (state != NULL)
6708 return nfs4_proc_unlck(state, cmd, request);
6709 return 0;
6710 }
1da177e4 6711
d953126a
TM		 6712 if (state == NULL)
6713 return -ENOLCK;
1ea67dbd
JL		 6714
6715 if ((request->fl_flags & FL_POSIX) &&
6716 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6717 return -ENOLCK;
6718
fcfa4470
BC		 6719 /*
6720 * Don't rely on the VFS having checked the file open mode,
6721 * since it won't do this for flock() locks.
6722 */
6723 switch (request->fl_type) {
6724 case F_RDLCK:
6725 if (!(filp->f_mode & FMODE_READ))
6726 return -EBADF;
6727 break;
6728 case F_WRLCK:
6729 if (!(filp->f_mode & FMODE_WRITE))
6730 return -EBADF;
6731 }
6732
1ea67dbd
JL		 6733 status = nfs4_set_lock_state(state, request);
6734 if (status != 0)
6735 return status;
6736
d2f3a7f9 6737 return nfs4_retry_setlk(state, cmd, request);
1da177e4
LT		 6738}
6739
db4f2e63 6740int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6741{
6742 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6743 int err;
6744
6745 err = nfs4_set_lock_state(state, fl);
6746 if (err != 0)
db4f2e63 6747 return err;
4a706fa0 6748 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6749 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6750}
6b3b5496 6751
cf470c3e
TM		 6752struct nfs_release_lockowner_data {
6753 struct nfs4_lock_state *lsp;
5ae67c4f 6754 struct nfs_server *server;
cf470c3e 6755 struct nfs_release_lockowner_args args;
b7e63a10 6756 struct nfs_release_lockowner_res res;
60ea6812 6757 unsigned long timestamp;
cf470c3e
TM		 6758};
6759
fbd4bfd1
CL		 6760static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6761{
6762 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6763 struct nfs_server *server = data->server;
7981c8a6
AS		 6764 nfs4_setup_sequence(server->nfs_client, &data->args.seq_args,
6765 &data->res.seq_res, task);
5b53dc88 6766 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6767 data->timestamp = jiffies;
fbd4bfd1
CL		 6768}
6769
6770static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6771{
6772 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6773 struct nfs_server *server = data->server;
6774
b7e63a10 6775 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6776
6777 switch (task->tk_status) {
6778 case 0:
6779 renew_lease(server, data->timestamp);
6780 break;
6781 case -NFS4ERR_STALE_CLIENTID:
6782 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6783 nfs4_schedule_lease_recovery(server->nfs_client);
6784 break;
60ea6812
CL		 6785 case -NFS4ERR_LEASE_MOVED:
6786 case -NFS4ERR_DELAY:
8478eaa1
N		 6787 if (nfs4_async_handle_error(task, server,
6788 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6789 rpc_restart_call_prepare(task);
6790 }
fbd4bfd1
CL		 6791}
6792
d3c7b7cc
TM		 6793static void nfs4_release_lockowner_release(void *calldata)
6794{
cf470c3e 6795 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6796 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6797 kfree(calldata);
6798}
6799
17280175 6800static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6801 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6802 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6803 .rpc_release = nfs4_release_lockowner_release,
6804};
6805
f1cdae87
JL		 6806static void
6807nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6808{
cf470c3e 6809 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6810 struct rpc_message msg = {
6811 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6812 };
6813
6814 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6815 return;
fbd4bfd1 6816
cf470c3e
TM		 6817 data = kmalloc(sizeof(*data), GFP_NOFS);
6818 if (!data)
f1cdae87 6819 return;
cf470c3e 6820 data->lsp = lsp;
5ae67c4f 6821 data->server = server;
cf470c3e
TM		 6822 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6823 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6824 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6825
cf470c3e 6826 msg.rpc_argp = &data->args;
b7e63a10
TM		 6827 msg.rpc_resp = &data->res;
6828 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6829 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6830}
6831
aa1870af
BF		 6832#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6833
d9a82a04 6834static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
59301226
AV		 6835 struct dentry *unused, struct inode *inode,
6836 const char *key, const void *buf,
6837 size_t buflen, int flags)
6b3b5496 6838{
59301226 6839 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 6840}
6841
d9a82a04 6842static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
b296821a
AV		 6843 struct dentry *unused, struct inode *inode,
6844 const char *key, void *buf, size_t buflen)
6b3b5496 6845{
b296821a 6846 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 6847}
6848
764a5c6b 6849static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6b3b5496 6850{
764a5c6b 6851 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6b3b5496
BF		 6852}
6853
c9bccef6 6854#ifdef CONFIG_NFS_V4_SECURITY_LABEL
c9bccef6 6855
d9a82a04 6856static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
59301226
AV		 6857 struct dentry *unused, struct inode *inode,
6858 const char *key, const void *buf,
6859 size_t buflen, int flags)
c9bccef6
DQ		 6860{
6861 if (security_ismaclabel(key))
59301226 6862 return nfs4_set_security_label(inode, buf, buflen);
c9bccef6
DQ		 6863
6864 return -EOPNOTSUPP;
6865}
6866
d9a82a04 6867static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
b296821a
AV		 6868 struct dentry *unused, struct inode *inode,
6869 const char *key, void *buf, size_t buflen)
c9bccef6
DQ		 6870{
6871 if (security_ismaclabel(key))
b296821a 6872 return nfs4_get_security_label(inode, buf, buflen);
c9bccef6
DQ		 6873 return -EOPNOTSUPP;
6874}
6875
c4803c49
AG		 6876static ssize_t
6877nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
c9bccef6 6878{
c4803c49 6879 int len = 0;
c9bccef6 6880
c4803c49
AG		 6881 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
6882 len = security_inode_listsecurity(inode, list, list_len);
6883 if (list_len && len > list_len)
6884 return -ERANGE;
c9bccef6
DQ		 6885 }
6886 return len;
6887}
6888
6889static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6890 .prefix = XATTR_SECURITY_PREFIX,
c9bccef6
DQ		 6891 .get = nfs4_xattr_get_nfs4_label,
6892 .set = nfs4_xattr_set_nfs4_label,
6893};
c9bccef6 6894
c4803c49
AG		 6895#else
6896
6897static ssize_t
6898nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6899{
6900 return 0;
6901}
6902
6903#endif
c9bccef6 6904
533eb461
AA		 6905/*
6906 * nfs_fhget will use either the mounted_on_fileid or the fileid
6907 */
69aaaae1
TM		 6908static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6909{
533eb461
AA		 6910 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6911 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6912 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6913 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6914 return;
6915
6916 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6917 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6918 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6919 fattr->nlink = 2;
6920}
6921
f05d147f
BS		 6922static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6923 const struct qstr *name,
6924 struct nfs4_fs_locations *fs_locations,
6925 struct page *page)
683b57b4
TM		 6926{
6927 struct nfs_server *server = NFS_SERVER(dir);
c05cefcc 6928 u32 bitmask[3];
683b57b4
TM		 6929 struct nfs4_fs_locations_arg args = {
6930 .dir_fh = NFS_FH(dir),
c228fd3a 6931 .name = name,
683b57b4
TM		 6932 .page = page,
6933 .bitmask = bitmask,
6934 };
22958463
BH		 6935 struct nfs4_fs_locations_res res = {
6936 .fs_locations = fs_locations,
6937 };
683b57b4
TM		 6938 struct rpc_message msg = {
6939 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6940 .rpc_argp = &args,
22958463 6941 .rpc_resp = &res,
683b57b4
TM		 6942 };
6943 int status;
6944
3110ff80 6945 dprintk("%s: start\n", __func__);
533eb461 6946
c05cefcc
CL		 6947 bitmask[0] = nfs4_fattr_bitmap[0] | FATTR4_WORD0_FS_LOCATIONS;
6948 bitmask[1] = nfs4_fattr_bitmap[1];
6949
533eb461
AA		 6950 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6951 * is not supported */
6952 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
c05cefcc 6953 bitmask[0] &= ~FATTR4_WORD0_FILEID;
533eb461 6954 else
c05cefcc 6955 bitmask[1] &= ~FATTR4_WORD1_MOUNTED_ON_FILEID;
533eb461 6956
c228fd3a 6957 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6958 fs_locations->server = server;
830b8e33 6959 fs_locations->nlocations = 0;
f05d147f 6960 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6961 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6962 return status;
6963}
6964
f05d147f
BS		 6965int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6966 const struct qstr *name,
6967 struct nfs4_fs_locations *fs_locations,
6968 struct page *page)
db0a9593
BS		 6969{
6970 struct nfs4_exception exception = { };
6971 int err;
6972 do {
078ea3df
TM		 6973 err = _nfs4_proc_fs_locations(client, dir, name,
6974 fs_locations, page);
6975 trace_nfs4_get_fs_locations(dir, name, err);
6976 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6977 &exception);
6978 } while (exception.retry);
6979 return err;
6980}
6981
b03d735b
CL		 6982/*
6983 * This operation also signals the server that this client is
6984 * performing migration recovery. The server can stop returning
6985 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6986 * appended to this compound to identify the client ID which is
6987 * performing recovery.
6988 */
6989static int _nfs40_proc_get_locations(struct inode *inode,
6990 struct nfs4_fs_locations *locations,
6991 struct page *page, struct rpc_cred *cred)
6992{
6993 struct nfs_server *server = NFS_SERVER(inode);
6994 struct rpc_clnt *clnt = server->client;
6995 u32 bitmask[2] = {
6996 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6997 };
6998 struct nfs4_fs_locations_arg args = {
6999 .clientid = server->nfs_client->cl_clientid,
7000 .fh = NFS_FH(inode),
7001 .page = page,
7002 .bitmask = bitmask,
7003 .migration = 1, /* skip LOOKUP */
7004 .renew = 1, /* append RENEW */
7005 };
7006 struct nfs4_fs_locations_res res = {
7007 .fs_locations = locations,
7008 .migration = 1,
7009 .renew = 1,
7010 };
7011 struct rpc_message msg = {
7012 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
7013 .rpc_argp = &args,
7014 .rpc_resp = &res,
7015 .rpc_cred = cred,
7016 };
7017 unsigned long now = jiffies;
7018 int status;
7019
7020 nfs_fattr_init(&locations->fattr);
7021 locations->server = server;
7022 locations->nlocations = 0;
7023
7024 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
7025 nfs4_set_sequence_privileged(&args.seq_args);
7026 status = nfs4_call_sync_sequence(clnt, server, &msg,
7027 &args.seq_args, &res.seq_res);
7028 if (status)
7029 return status;
7030
7031 renew_lease(server, now);
7032 return 0;
7033}
7034
7035#ifdef CONFIG_NFS_V4_1
7036
7037/*
7038 * This operation also signals the server that this client is
7039 * performing migration recovery. The server can stop asserting
7040 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
7041 * performing this operation is identified in the SEQUENCE
7042 * operation in this compound.
7043 *
7044 * When the client supports GETATTR(fs_locations_info), it can
7045 * be plumbed in here.
7046 */
7047static int _nfs41_proc_get_locations(struct inode *inode,
7048 struct nfs4_fs_locations *locations,
7049 struct page *page, struct rpc_cred *cred)
7050{
7051 struct nfs_server *server = NFS_SERVER(inode);
7052 struct rpc_clnt *clnt = server->client;
7053 u32 bitmask[2] = {
7054 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
7055 };
7056 struct nfs4_fs_locations_arg args = {
7057 .fh = NFS_FH(inode),
7058 .page = page,
7059 .bitmask = bitmask,
7060 .migration = 1, /* skip LOOKUP */
7061 };
7062 struct nfs4_fs_locations_res res = {
7063 .fs_locations = locations,
7064 .migration = 1,
7065 };
7066 struct rpc_message msg = {
7067 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
7068 .rpc_argp = &args,
7069 .rpc_resp = &res,
7070 .rpc_cred = cred,
7071 };
7072 int status;
7073
7074 nfs_fattr_init(&locations->fattr);
7075 locations->server = server;
7076 locations->nlocations = 0;
7077
7078 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
7079 nfs4_set_sequence_privileged(&args.seq_args);
7080 status = nfs4_call_sync_sequence(clnt, server, &msg,
7081 &args.seq_args, &res.seq_res);
7082 if (status == NFS4_OK &&
7083 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
7084 status = -NFS4ERR_LEASE_MOVED;
7085 return status;
7086}
7087
7088#endif /* CONFIG_NFS_V4_1 */
7089
7090/**
7091 * nfs4_proc_get_locations - discover locations for a migrated FSID
7092 * @inode: inode on FSID that is migrating
7093 * @locations: result of query
7094 * @page: buffer
7095 * @cred: credential to use for this operation
7096 *
7097 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
7098 * operation failed, or a negative errno if a local error occurred.
7099 *
7100 * On success, "locations" is filled in, but if the server has
7101 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
7102 * asserted.
7103 *
7104 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
7105 * from this client that require migration recovery.
7106 */
7107int nfs4_proc_get_locations(struct inode *inode,
7108 struct nfs4_fs_locations *locations,
7109 struct page *page, struct rpc_cred *cred)
7110{
7111 struct nfs_server *server = NFS_SERVER(inode);
7112 struct nfs_client *clp = server->nfs_client;
7113 const struct nfs4_mig_recovery_ops *ops =
7114 clp->cl_mvops->mig_recovery_ops;
7115 struct nfs4_exception exception = { };
7116 int status;
7117
7118 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
7119 (unsigned long long)server->fsid.major,
7120 (unsigned long long)server->fsid.minor,
7121 clp->cl_hostname);
7122 nfs_display_fhandle(NFS_FH(inode), __func__);
7123
7124 do {
7125 status = ops->get_locations(inode, locations, page, cred);
7126 if (status != -NFS4ERR_DELAY)
7127 break;
7128 nfs4_handle_exception(server, status, &exception);
7129 } while (exception.retry);
7130 return status;
7131}
7132
44c99933
CL		 7133/*
7134 * This operation also signals the server that this client is
7135 * performing "lease moved" recovery. The server can stop
7136 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
7137 * is appended to this compound to identify the client ID which is
7138 * performing recovery.
7139 */
7140static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7141{
7142 struct nfs_server *server = NFS_SERVER(inode);
7143 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
7144 struct rpc_clnt *clnt = server->client;
7145 struct nfs4_fsid_present_arg args = {
7146 .fh = NFS_FH(inode),
7147 .clientid = clp->cl_clientid,
7148 .renew = 1, /* append RENEW */
7149 };
7150 struct nfs4_fsid_present_res res = {
7151 .renew = 1,
7152 };
7153 struct rpc_message msg = {
7154 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
7155 .rpc_argp = &args,
7156 .rpc_resp = &res,
7157 .rpc_cred = cred,
7158 };
7159 unsigned long now = jiffies;
7160 int status;
7161
7162 res.fh = nfs_alloc_fhandle();
7163 if (res.fh == NULL)
7164 return -ENOMEM;
7165
7166 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
7167 nfs4_set_sequence_privileged(&args.seq_args);
7168 status = nfs4_call_sync_sequence(clnt, server, &msg,
7169 &args.seq_args, &res.seq_res);
7170 nfs_free_fhandle(res.fh);
7171 if (status)
7172 return status;
7173
7174 do_renew_lease(clp, now);
7175 return 0;
7176}
7177
7178#ifdef CONFIG_NFS_V4_1
7179
7180/*
7181 * This operation also signals the server that this client is
7182 * performing "lease moved" recovery. The server can stop asserting
7183 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
7184 * this operation is identified in the SEQUENCE operation in this
7185 * compound.
7186 */
7187static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7188{
7189 struct nfs_server *server = NFS_SERVER(inode);
7190 struct rpc_clnt *clnt = server->client;
7191 struct nfs4_fsid_present_arg args = {
7192 .fh = NFS_FH(inode),
7193 };
7194 struct nfs4_fsid_present_res res = {
7195 };
7196 struct rpc_message msg = {
7197 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
7198 .rpc_argp = &args,
7199 .rpc_resp = &res,
7200 .rpc_cred = cred,
7201 };
7202 int status;
7203
7204 res.fh = nfs_alloc_fhandle();
7205 if (res.fh == NULL)
7206 return -ENOMEM;
7207
7208 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
7209 nfs4_set_sequence_privileged(&args.seq_args);
7210 status = nfs4_call_sync_sequence(clnt, server, &msg,
7211 &args.seq_args, &res.seq_res);
7212 nfs_free_fhandle(res.fh);
7213 if (status == NFS4_OK &&
7214 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
7215 status = -NFS4ERR_LEASE_MOVED;
7216 return status;
7217}
7218
7219#endif /* CONFIG_NFS_V4_1 */
7220
7221/**
7222 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
7223 * @inode: inode on FSID to check
7224 * @cred: credential to use for this operation
7225 *
7226 * Server indicates whether the FSID is present, moved, or not
7227 * recognized. This operation is necessary to clear a LEASE_MOVED
7228 * condition for this client ID.
7229 *
7230 * Returns NFS4_OK if the FSID is present on this server,
7231 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
7232 * NFS4ERR code if some error occurred on the server, or a
7233 * negative errno if a local failure occurred.
7234 */
7235int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7236{
7237 struct nfs_server *server = NFS_SERVER(inode);
7238 struct nfs_client *clp = server->nfs_client;
7239 const struct nfs4_mig_recovery_ops *ops =
7240 clp->cl_mvops->mig_recovery_ops;
7241 struct nfs4_exception exception = { };
7242 int status;
7243
7244 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
7245 (unsigned long long)server->fsid.major,
7246 (unsigned long long)server->fsid.minor,
7247 clp->cl_hostname);
7248 nfs_display_fhandle(NFS_FH(inode), __func__);
7249
7250 do {
7251 status = ops->fsid_present(inode, cred);
7252 if (status != -NFS4ERR_DELAY)
7253 break;
7254 nfs4_handle_exception(server, status, &exception);
7255 } while (exception.retry);
7256 return status;
7257}
7258
5ec16a85 7259/**
a5250def
WAA		 7260 * If 'use_integrity' is true and the state managment nfs_client
7261 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
7262 * and the machine credential as per RFC3530bis and RFC5661 Security
7263 * Considerations sections. Otherwise, just use the user cred with the
7264 * filesystem's rpc_client.
5ec16a85 7265 */
a5250def 7266static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 7267{
7268 int status;
7269 struct nfs4_secinfo_arg args = {
7270 .dir_fh = NFS_FH(dir),
7271 .name = name,
7272 };
7273 struct nfs4_secinfo_res res = {
7274 .flavors = flavors,
7275 };
7276 struct rpc_message msg = {
7277 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
7278 .rpc_argp = &args,
7279 .rpc_resp = &res,
7280 };
a5250def 7281 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 7282 struct rpc_cred *cred = NULL;
a5250def
WAA		 7283
7284 if (use_integrity) {
7285 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 7286 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
7287 msg.rpc_cred = cred;
a5250def 7288 }
5a5ea0d4
BS		 7289
7290 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 7291
7292 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
7293 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
7294
a5250def
WAA		 7295 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
7296 &res.seq_res, 0);
5a5ea0d4 7297 dprintk("NFS reply secinfo: %d\n", status);
a5250def 7298
7cb852df
WAA		 7299 if (cred)
7300 put_rpccred(cred);
a5250def 7301
5a5ea0d4
BS		 7302 return status;
7303}
7304
72de53ec
BS		 7305int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
7306 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 7307{
7308 struct nfs4_exception exception = { };
7309 int err;
7310 do {
a5250def
WAA		 7311 err = -NFS4ERR_WRONGSEC;
7312
7313 /* try to use integrity protection with machine cred */
7314 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
7315 err = _nfs4_proc_secinfo(dir, name, flavors, true);
7316
7317 /*
7318 * if unable to use integrity protection, or SECINFO with
7319 * integrity protection returns NFS4ERR_WRONGSEC (which is
7320 * disallowed by spec, but exists in deployed servers) use
7321 * the current filesystem's rpc_client and the user cred.
7322 */
7323 if (err == -NFS4ERR_WRONGSEC)
7324 err = _nfs4_proc_secinfo(dir, name, flavors, false);
7325
078ea3df
TM		 7326 trace_nfs4_secinfo(dir, name, err);
7327 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 7328 &exception);
7329 } while (exception.retry);
7330 return err;
7331}
7332
557134a3 7333#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 7334/*
7335 * Check the exchange flags returned by the server for invalid flags, having
7336 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
7337 * DS flags set.
7338 */
7339static int nfs4_check_cl_exchange_flags(u32 flags)
7340{
7341 if (flags & ~EXCHGID4_FLAG_MASK_R)
7342 goto out_inval;
7343 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
7344 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
7345 goto out_inval;
7346 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
7347 goto out_inval;
7348 return NFS_OK;
7349out_inval:
7350 return -NFS4ERR_INVAL;
7351}
7352
78fe0f41 7353static bool
79d4e1f0
CL		 7354nfs41_same_server_scope(struct nfs41_server_scope *a,
7355 struct nfs41_server_scope *b)
78fe0f41 7356{
49ad0145
AS		 7357 if (a->server_scope_sz != b->server_scope_sz)
7358 return false;
7359 return memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0;
78fe0f41
WAA		 7360}
7361
02a95dee
AA		 7362static void
7363nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
7364{
7365}
7366
7367static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
7368 .rpc_call_done = &nfs4_bind_one_conn_to_session_done,
7369};
7370
7c44f1ae 7371/*
d9ddbf5d 7372 * nfs4_proc_bind_one_conn_to_session()
7c44f1ae
WAA		 7373 *
7374 * The 4.1 client currently uses the same TCP connection for the
7375 * fore and backchannel.
7376 */
d9ddbf5d
TM		 7377static
7378int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
7379 struct rpc_xprt *xprt,
7380 struct nfs_client *clp,
7381 struct rpc_cred *cred)
7c44f1ae
WAA		 7382{
7383 int status;
71a097c6
TM		 7384 struct nfs41_bind_conn_to_session_args args = {
7385 .client = clp,
7386 .dir = NFS4_CDFC4_FORE_OR_BOTH,
7387 };
7c44f1ae
WAA		 7388 struct nfs41_bind_conn_to_session_res res;
7389 struct rpc_message msg = {
7390 .rpc_proc =
7391 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 7392 .rpc_argp = &args,
7c44f1ae 7393 .rpc_resp = &res,
2cf047c9 7394 .rpc_cred = cred,
7c44f1ae 7395 };
d9ddbf5d
TM		 7396 struct rpc_task_setup task_setup_data = {
7397 .rpc_client = clnt,
7398 .rpc_xprt = xprt,
02a95dee 7399 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
d9ddbf5d
TM		 7400 .rpc_message = &msg,
7401 .flags = RPC_TASK_TIMEOUT,
7402 };
7403 struct rpc_task *task;
7c44f1ae 7404
71a097c6
TM		 7405 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
7406 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
7407 args.dir = NFS4_CDFC4_FORE;
7c44f1ae 7408
d9ddbf5d
TM		 7409 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
7410 if (xprt != rcu_access_pointer(clnt->cl_xprt))
7411 args.dir = NFS4_CDFC4_FORE;
7412
7413 task = rpc_run_task(&task_setup_data);
7414 if (!IS_ERR(task)) {
7415 status = task->tk_status;
7416 rpc_put_task(task);
7417 } else
7418 status = PTR_ERR(task);
c6d01c6f 7419 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 7420 if (status == 0) {
71a097c6 7421 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 7422 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
7423 dprintk("NFS: %s: Session ID mismatch\n", __func__);
c7ae7639 7424 return -EIO;
7c44f1ae 7425 }
71a097c6 7426 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 7427 dprintk("NFS: %s: Unexpected direction from server\n",
7428 __func__);
c7ae7639 7429 return -EIO;
7c44f1ae 7430 }
71a097c6 7431 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 7432 dprintk("NFS: %s: Server returned RDMA mode = true\n",
7433 __func__);
c7ae7639 7434 return -EIO;
7c44f1ae
WAA		 7435 }
7436 }
c7ae7639 7437
7c44f1ae
WAA		 7438 return status;
7439}
7440
d9ddbf5d
TM		 7441struct rpc_bind_conn_calldata {
7442 struct nfs_client *clp;
7443 struct rpc_cred *cred;
7444};
7445
7446static int
7447nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
7448 struct rpc_xprt *xprt,
7449 void *calldata)
7450{
7451 struct rpc_bind_conn_calldata *p = calldata;
7452
7453 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
7454}
7455
7456int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7457{
7458 struct rpc_bind_conn_calldata data = {
7459 .clp = clp,
7460 .cred = cred,
7461 };
7462 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
7463 nfs4_proc_bind_conn_to_session_callback, &data);
7464}
7465
99fe60d0 7466/*
fa940720
WAA		 7467 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
7468 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 7469 */
7470static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
7471 .how = SP4_MACH_CRED,
7472 .enforce.u.words = {
7473 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7474 1 << (OP_EXCHANGE_ID - 32) |
7475 1 << (OP_CREATE_SESSION - 32) |
7476 1 << (OP_DESTROY_SESSION - 32) |
7477 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 7478 },
7479 .allow.u.words = {
7480 [0] = 1 << (OP_CLOSE) |
99ade3c7 7481 1 << (OP_OPEN_DOWNGRADE) |
a0279625 7482 1 << (OP_LOCKU) |
99ade3c7 7483 1 << (OP_DELEGRETURN) |
a0279625 7484 1 << (OP_COMMIT),
8b5bee2e 7485 [1] = 1 << (OP_SECINFO - 32) |
3787d506 7486 1 << (OP_SECINFO_NO_NAME - 32) |
99ade3c7 7487 1 << (OP_LAYOUTRETURN - 32) |
3787d506 7488 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 7489 1 << (OP_FREE_STATEID - 32) |
7490 1 << (OP_WRITE - 32)
2031cd1a
WAA		 7491 }
7492};
7493
7494/*
7495 * Select the state protection mode for client `clp' given the server results
7496 * from exchange_id in `sp'.
99fe60d0 7497 *
2031cd1a
WAA		 7498 * Returns 0 on success, negative errno otherwise.
7499 */
7500static int nfs4_sp4_select_mode(struct nfs_client *clp,
7501 struct nfs41_state_protection *sp)
7502{
7503 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
7504 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7505 1 << (OP_EXCHANGE_ID - 32) |
7506 1 << (OP_CREATE_SESSION - 32) |
7507 1 << (OP_DESTROY_SESSION - 32) |
7508 1 << (OP_DESTROY_CLIENTID - 32)
7509 };
937e3133 7510 unsigned long flags = 0;
2031cd1a 7511 unsigned int i;
937e3133 7512 int ret = 0;
2031cd1a
WAA		 7513
7514 if (sp->how == SP4_MACH_CRED) {
7515 /* Print state protect result */
7516 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
7517 for (i = 0; i <= LAST_NFS4_OP; i++) {
7518 if (test_bit(i, sp->enforce.u.longs))
7519 dfprintk(MOUNT, " enforce op %d\n", i);
7520 if (test_bit(i, sp->allow.u.longs))
7521 dfprintk(MOUNT, " allow op %d\n", i);
7522 }
7523
7524 /* make sure nothing is on enforce list that isn't supported */
7525 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
7526 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
7527 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
937e3133
TM		 7528 ret = -EINVAL;
7529 goto out;
2031cd1a
WAA		 7530 }
7531 }
7532
7533 /*
7534 * Minimal mode - state operations are allowed to use machine
7535 * credential. Note this already happens by default, so the
7536 * client doesn't have to do anything more than the negotiation.
7537 *
7538 * NOTE: we don't care if EXCHANGE_ID is in the list -
7539 * we're already using the machine cred for exchange_id
7540 * and will never use a different cred.
7541 */
7542 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
7543 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
7544 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
7545 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
7546 dfprintk(MOUNT, "sp4_mach_cred:\n");
7547 dfprintk(MOUNT, " minimal mode enabled\n");
937e3133 7548 __set_bit(NFS_SP4_MACH_CRED_MINIMAL, &flags);
2031cd1a
WAA		 7549 } else {
7550 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
937e3133
TM		 7551 ret = -EINVAL;
7552 goto out;
2031cd1a 7553 }
fa940720
WAA		 7554
7555 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
99ade3c7
AE		 7556 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
7557 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
fa940720
WAA		 7558 test_bit(OP_LOCKU, sp->allow.u.longs)) {
7559 dfprintk(MOUNT, " cleanup mode enabled\n");
937e3133 7560 __set_bit(NFS_SP4_MACH_CRED_CLEANUP, &flags);
fa940720 7561 }
8b5bee2e 7562
99ade3c7
AE		 7563 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
7564 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
937e3133 7565 __set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP, &flags);
99ade3c7
AE		 7566 }
7567
8b5bee2e
WAA		 7568 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
7569 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
7570 dfprintk(MOUNT, " secinfo mode enabled\n");
937e3133 7571 __set_bit(NFS_SP4_MACH_CRED_SECINFO, &flags);
8b5bee2e 7572 }
3787d506
WAA		 7573
7574 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
7575 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
7576 dfprintk(MOUNT, " stateid mode enabled\n");
937e3133 7577 __set_bit(NFS_SP4_MACH_CRED_STATEID, &flags);
3787d506 7578 }
8c21c62c
WAA		 7579
7580 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
7581 dfprintk(MOUNT, " write mode enabled\n");
937e3133 7582 __set_bit(NFS_SP4_MACH_CRED_WRITE, &flags);
8c21c62c
WAA		 7583 }
7584
7585 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
7586 dfprintk(MOUNT, " commit mode enabled\n");
937e3133 7587 __set_bit(NFS_SP4_MACH_CRED_COMMIT, &flags);
8c21c62c 7588 }
2031cd1a 7589 }
937e3133
TM		 7590out:
7591 clp->cl_sp4_flags = flags;
2031cd1a
WAA		 7592 return 0;
7593}
7594
8d89bd70
AA		 7595struct nfs41_exchange_id_data {
7596 struct nfs41_exchange_id_res res;
7597 struct nfs41_exchange_id_args args;
8d89bd70
AA		 7598};
7599
8d89bd70
AA		 7600static void nfs4_exchange_id_release(void *data)
7601{
7602 struct nfs41_exchange_id_data *cdata =
7603 (struct nfs41_exchange_id_data *)data;
7604
63513232 7605 nfs_put_client(cdata->args.client);
8d89bd70
AA		 7606 kfree(cdata->res.impl_id);
7607 kfree(cdata->res.server_scope);
7608 kfree(cdata->res.server_owner);
7609 kfree(cdata);
7610}
7611
7612static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
8d89bd70
AA		 7613 .rpc_release = nfs4_exchange_id_release,
7614};
7615
2031cd1a
WAA		 7616/*
7617 * _nfs4_proc_exchange_id()
6bbb4ae8 7618 *
2031cd1a 7619 * Wrapper for EXCHANGE_ID operation.
99fe60d0 7620 */
9c760d1f
TM		 7621static struct rpc_task *
7622nfs4_run_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
ad0849a7 7623 u32 sp4_how, struct rpc_xprt *xprt)
99fe60d0 7624{
99fe60d0
BH		 7625 struct rpc_message msg = {
7626 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
99fe60d0
BH		 7627 .rpc_cred = cred,
7628 };
8d89bd70
AA		 7629 struct rpc_task_setup task_setup_data = {
7630 .rpc_client = clp->cl_rpcclient,
7631 .callback_ops = &nfs4_exchange_id_call_ops,
7632 .rpc_message = &msg,
d9cb7330 7633 .flags = RPC_TASK_TIMEOUT,
8d89bd70
AA		 7634 };
7635 struct nfs41_exchange_id_data *calldata;
e917f0d1 7636 int status;
8d89bd70 7637
212bf41d 7638 if (!refcount_inc_not_zero(&clp->cl_count))
9c760d1f 7639 return ERR_PTR(-EIO);
8d89bd70 7640
9c760d1f 7641 status = -ENOMEM;
8d89bd70 7642 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
9c760d1f
TM		 7643 if (!calldata)
7644 goto out;
99fe60d0 7645
fd40559c 7646 nfs4_init_boot_verifier(clp, &calldata->args.verifier);
873e3851
JL		 7647
7648 status = nfs4_init_uniform_client_string(clp);
7649 if (status)
8d89bd70 7650 goto out_calldata;
3a6bb738 7651
8d89bd70
AA		 7652 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
7653 GFP_NOFS);
7654 status = -ENOMEM;
7655 if (unlikely(calldata->res.server_owner == NULL))
7656 goto out_calldata;
78fe0f41 7657
8d89bd70 7658 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 7659 GFP_NOFS);
8d89bd70 7660 if (unlikely(calldata->res.server_scope == NULL))
acdeb69d 7661 goto out_server_owner;
78fe0f41 7662
8d89bd70
AA		 7663 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
7664 if (unlikely(calldata->res.impl_id == NULL))
7d2ed9ac 7665 goto out_server_scope;
7d2ed9ac 7666
2031cd1a
WAA		 7667 switch (sp4_how) {
7668 case SP4_NONE:
8d89bd70 7669 calldata->args.state_protect.how = SP4_NONE;
2031cd1a
WAA		 7670 break;
7671
7672 case SP4_MACH_CRED:
8d89bd70 7673 calldata->args.state_protect = nfs4_sp4_mach_cred_request;
2031cd1a
WAA		 7674 break;
7675
7676 default:
7677 /* unsupported! */
7678 WARN_ON_ONCE(1);
7679 status = -EINVAL;
6b55970b 7680 goto out_impl_id;
2031cd1a 7681 }
ad0849a7 7682 if (xprt) {
ad0849a7 7683 task_setup_data.rpc_xprt = xprt;
d9cb7330 7684 task_setup_data.flags |= RPC_TASK_SOFTCONN;
fd40559c
TM		 7685 memcpy(calldata->args.verifier.data, clp->cl_confirm.data,
7686 sizeof(calldata->args.verifier.data));
ad0849a7 7687 }
8d89bd70 7688 calldata->args.client = clp;
8d89bd70 7689 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
bfab2817
TM		 7690 EXCHGID4_FLAG_BIND_PRINC_STATEID;
7691#ifdef CONFIG_NFS_V4_1_MIGRATION
7692 calldata->args.flags |= EXCHGID4_FLAG_SUPP_MOVED_MIGR;
8d89bd70
AA		 7693#endif
7694 msg.rpc_argp = &calldata->args;
7695 msg.rpc_resp = &calldata->res;
7696 task_setup_data.callback_data = calldata;
2031cd1a 7697
9c760d1f 7698 return rpc_run_task(&task_setup_data);
8d89bd70
AA		 7699
7700out_impl_id:
7701 kfree(calldata->res.impl_id);
7702out_server_scope:
7703 kfree(calldata->res.server_scope);
7704out_server_owner:
7705 kfree(calldata->res.server_owner);
7706out_calldata:
7707 kfree(calldata);
9c760d1f 7708out:
63513232 7709 nfs_put_client(clp);
9c760d1f
TM		 7710 return ERR_PTR(status);
7711}
7712
7713/*
7714 * _nfs4_proc_exchange_id()
7715 *
7716 * Wrapper for EXCHANGE_ID operation.
7717 */
7718static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
7719 u32 sp4_how)
7720{
7721 struct rpc_task *task;
7722 struct nfs41_exchange_id_args *argp;
7723 struct nfs41_exchange_id_res *resp;
7724 int status;
7725
7726 task = nfs4_run_exchange_id(clp, cred, sp4_how, NULL);
7727 if (IS_ERR(task))
7728 return PTR_ERR(task);
7729
7730 argp = task->tk_msg.rpc_argp;
7731 resp = task->tk_msg.rpc_resp;
7732 status = task->tk_status;
7733 if (status != 0)
7734 goto out;
7735
7736 status = nfs4_check_cl_exchange_flags(resp->flags);
7737 if (status != 0)
7738 goto out;
7739
7740 status = nfs4_sp4_select_mode(clp, &resp->state_protect);
7741 if (status != 0)
7742 goto out;
7743
7744 clp->cl_clientid = resp->clientid;
7745 clp->cl_exchange_flags = resp->flags;
7746 clp->cl_seqid = resp->seqid;
7747 /* Client ID is not confirmed */
7748 if (!(resp->flags & EXCHGID4_FLAG_CONFIRMED_R))
7749 clear_bit(NFS4_SESSION_ESTABLISHED,
7750 &clp->cl_session->session_state);
7751
7752 if (clp->cl_serverscope != NULL &&
7753 !nfs41_same_server_scope(clp->cl_serverscope,
7754 resp->server_scope)) {
7755 dprintk("%s: server_scope mismatch detected\n",
7756 __func__);
7757 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
7758 }
7759
7760 swap(clp->cl_serverowner, resp->server_owner);
7761 swap(clp->cl_serverscope, resp->server_scope);
7762 swap(clp->cl_implid, resp->impl_id);
7763
7764 /* Save the EXCHANGE_ID verifier session trunk tests */
7765 memcpy(clp->cl_confirm.data, argp->verifier.data,
7766 sizeof(clp->cl_confirm.data));
7767out:
7768 trace_nfs4_exchange_id(clp, status);
7769 rpc_put_task(task);
7770 return status;
99fe60d0
BH		 7771}
7772
2031cd1a
WAA		 7773/*
7774 * nfs4_proc_exchange_id()
7775 *
7776 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7777 *
7778 * Since the clientid has expired, all compounds using sessions
7779 * associated with the stale clientid will be returning
7780 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7781 * be in some phase of session reset.
7782 *
7783 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7784 */
7785int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7786{
7787 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7788 int status;
7789
7790 /* try SP4_MACH_CRED if krb5i/p */
7791 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7792 authflavor == RPC_AUTH_GSS_KRB5P) {
9c760d1f 7793 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
2031cd1a
WAA		 7794 if (!status)
7795 return 0;
7796 }
7797
7798 /* try SP4_NONE */
9c760d1f 7799 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
2031cd1a
WAA		 7800}
7801
04fa2c6b
AA		 7802/**
7803 * nfs4_test_session_trunk
7804 *
7805 * This is an add_xprt_test() test function called from
7806 * rpc_clnt_setup_test_and_add_xprt.
7807 *
7808 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt
7809 * and is dereferrenced in nfs4_exchange_id_release
7810 *
7811 * Upon success, add the new transport to the rpc_clnt
7812 *
7813 * @clnt: struct rpc_clnt to get new transport
7814 * @xprt: the rpc_xprt to test
7815 * @data: call data for _nfs4_proc_exchange_id.
7816 */
7817int nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
7818 void *data)
7819{
7820 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data;
9c760d1f
TM		 7821 struct rpc_task *task;
7822 int status;
7823
04fa2c6b
AA		 7824 u32 sp4_how;
7825
7826 dprintk("--> %s try %s\n", __func__,
7827 xprt->address_strings[RPC_DISPLAY_ADDR]);
7828
7829 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED);
7830
7831 /* Test connection for session trunking. Async exchange_id call */
9c760d1f
TM		 7832 task = nfs4_run_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
7833 if (IS_ERR(task))
7834 return PTR_ERR(task);
7835
7836 status = task->tk_status;
7837 if (status == 0)
7838 status = nfs4_detect_session_trunking(adata->clp,
7839 task->tk_msg.rpc_resp, xprt);
7840
7841 rpc_put_task(task);
7842 return status;
2031cd1a 7843}
04fa2c6b 7844EXPORT_SYMBOL_GPL(nfs4_test_session_trunk);
2031cd1a 7845
66245539
TM		 7846static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7847 struct rpc_cred *cred)
7848{
7849 struct rpc_message msg = {
7850 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7851 .rpc_argp = clp,
7852 .rpc_cred = cred,
7853 };
7854 int status;
7855
7856 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7857 trace_nfs4_destroy_clientid(clp, status);
66245539 7858 if (status)
02c67525 7859 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7860 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7861 return status;
7862}
7863
7864static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7865 struct rpc_cred *cred)
7866{
7867 unsigned int loop;
7868 int ret;
7869
7870 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7871 ret = _nfs4_proc_destroy_clientid(clp, cred);
7872 switch (ret) {
7873 case -NFS4ERR_DELAY:
7874 case -NFS4ERR_CLIENTID_BUSY:
7875 ssleep(1);
7876 break;
7877 default:
7878 return ret;
7879 }
7880 }
7881 return 0;
7882}
7883
7884int nfs4_destroy_clientid(struct nfs_client *clp)
7885{
7886 struct rpc_cred *cred;
7887 int ret = 0;
7888
7889 if (clp->cl_mvops->minor_version < 1)
7890 goto out;
7891 if (clp->cl_exchange_flags == 0)
7892 goto out;
05f4c350
CL		 7893 if (clp->cl_preserve_clid)
7894 goto out;
73d8bde5 7895 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7896 ret = nfs4_proc_destroy_clientid(clp, cred);
7897 if (cred)
7898 put_rpccred(cred);
7899 switch (ret) {
7900 case 0:
7901 case -NFS4ERR_STALE_CLIENTID:
7902 clp->cl_exchange_flags = 0;
7903 }
7904out:
7905 return ret;
7906}
7907
2050f0cc
AA		 7908struct nfs4_get_lease_time_data {
7909 struct nfs4_get_lease_time_args *args;
7910 struct nfs4_get_lease_time_res *res;
7911 struct nfs_client *clp;
7912};
7913
7914static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7915 void *calldata)
7916{
2050f0cc
AA		 7917 struct nfs4_get_lease_time_data *data =
7918 (struct nfs4_get_lease_time_data *)calldata;
7919
7920 dprintk("--> %s\n", __func__);
7921 /* just setup sequence, do not trigger session recovery
7922 since we're invoked within one */
7981c8a6 7923 nfs4_setup_sequence(data->clp,
d9afbd1b
TM		 7924 &data->args->la_seq_args,
7925 &data->res->lr_seq_res,
7926 task);
2050f0cc
AA		 7927 dprintk("<-- %s\n", __func__);
7928}
7929
7930/*
7931 * Called from nfs4_state_manager thread for session setup, so don't recover
7932 * from sequence operation or clientid errors.
7933 */
7934static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7935{
7936 struct nfs4_get_lease_time_data *data =
7937 (struct nfs4_get_lease_time_data *)calldata;
7938
7939 dprintk("--> %s\n", __func__);
14516c3a
TM		 7940 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7941 return;
2050f0cc
AA		 7942 switch (task->tk_status) {
7943 case -NFS4ERR_DELAY:
7944 case -NFS4ERR_GRACE:
7945 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7946 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7947 task->tk_status = 0;
a8a4ae3a
AA		 7948 /* fall through */
7949 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7950 rpc_restart_call_prepare(task);
2050f0cc
AA		 7951 return;
7952 }
2050f0cc
AA		 7953 dprintk("<-- %s\n", __func__);
7954}
7955
17280175 7956static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7957 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7958 .rpc_call_done = nfs4_get_lease_time_done,
7959};
7960
7961int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7962{
7963 struct rpc_task *task;
7964 struct nfs4_get_lease_time_args args;
7965 struct nfs4_get_lease_time_res res = {
7966 .lr_fsinfo = fsinfo,
7967 };
7968 struct nfs4_get_lease_time_data data = {
7969 .args = &args,
7970 .res = &res,
7971 .clp = clp,
7972 };
7973 struct rpc_message msg = {
7974 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7975 .rpc_argp = &args,
7976 .rpc_resp = &res,
7977 };
7978 struct rpc_task_setup task_setup = {
7979 .rpc_client = clp->cl_rpcclient,
7980 .rpc_message = &msg,
7981 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7982 .callback_data = &data,
7983 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7984 };
7985 int status;
7986
a9c92d6b 7987 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7988 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7989 task = rpc_run_task(&task_setup);
7990
7991 if (IS_ERR(task))
f6148713 7992 return PTR_ERR(task);
2050f0cc 7993
f6148713
AS		 7994 status = task->tk_status;
7995 rpc_put_task(task);
2050f0cc
AA		 7996 return status;
7997}
7998
fc931582
AA		 7999/*
8000 * Initialize the values to be used by the client in CREATE_SESSION
8001 * If nfs4_init_session set the fore channel request and response sizes,
8002 * use them.
8003 *
8004 * Set the back channel max_resp_sz_cached to zero to force the client to
8005 * always set csa_cachethis to FALSE because the current implementation
8006 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
8007 */
6b26cc8c
CL		 8008static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
8009 struct rpc_clnt *clnt)
fc931582 8010{
18aad3d5 8011 unsigned int max_rqst_sz, max_resp_sz;
6b26cc8c 8012 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
18aad3d5
AA		 8013
8014 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
8015 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 8016
fc931582 8017 /* Fore channel attributes */
18aad3d5
AA		 8018 args->fc_attrs.max_rqst_sz = max_rqst_sz;
8019 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 8020 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 8021 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 8022
8023 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 8024 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 8025 __func__,
8026 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 8027 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 8028
8029 /* Back channel attributes */
6b26cc8c
CL		 8030 args->bc_attrs.max_rqst_sz = max_bc_payload;
8031 args->bc_attrs.max_resp_sz = max_bc_payload;
fc931582
AA		 8032 args->bc_attrs.max_resp_sz_cached = 0;
8033 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5405fc44 8034 args->bc_attrs.max_reqs = min_t(unsigned short, max_session_cb_slots, 1);
fc931582
AA		 8035
8036 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
8037 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
8038 __func__,
8039 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
8040 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
8041 args->bc_attrs.max_reqs);
8042}
8043
79969dd1
TM		 8044static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
8045 struct nfs41_create_session_res *res)
8d35301d 8046{
43c2e885 8047 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 8048 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 8049
43c2e885
BF		 8050 if (rcvd->max_resp_sz > sent->max_resp_sz)
8051 return -EINVAL;
8052 /*
8053 * Our requested max_ops is the minimum we need; we're not
8054 * prepared to break up compounds into smaller pieces than that.
8055 * So, no point even trying to continue if the server won't
8056 * cooperate:
8057 */
8058 if (rcvd->max_ops < sent->max_ops)
8059 return -EINVAL;
8060 if (rcvd->max_reqs == 0)
8061 return -EINVAL;
b4b9a0c1
VG		 8062 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
8063 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 8064 return 0;
8d35301d
AA		 8065}
8066
79969dd1
TM		 8067static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
8068 struct nfs41_create_session_res *res)
43c2e885
BF		 8069{
8070 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 8071 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 8072
b1c0df5f
TM		 8073 if (!(res->flags & SESSION4_BACK_CHAN))
8074 goto out;
43c2e885
BF		 8075 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
8076 return -EINVAL;
8077 if (rcvd->max_resp_sz < sent->max_resp_sz)
8078 return -EINVAL;
8079 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
8080 return -EINVAL;
5405fc44 8081 if (rcvd->max_ops > sent->max_ops)
43c2e885 8082 return -EINVAL;
5405fc44 8083 if (rcvd->max_reqs > sent->max_reqs)
43c2e885 8084 return -EINVAL;
b1c0df5f 8085out:
43c2e885
BF		 8086 return 0;
8087}
8d35301d 8088
8d35301d 8089static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 8090 struct nfs41_create_session_res *res)
8d35301d 8091{
43c2e885 8092 int ret;
8d35301d 8093
79969dd1 8094 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 8095 if (ret)
8096 return ret;
79969dd1
TM		 8097 return nfs4_verify_back_channel_attrs(args, res);
8098}
8099
8100static void nfs4_update_session(struct nfs4_session *session,
8101 struct nfs41_create_session_res *res)
8102{
8103 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 8104 /* Mark client id and session as being confirmed */
8105 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
8106 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 8107 session->flags = res->flags;
8108 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 8109 if (res->flags & SESSION4_BACK_CHAN)
8110 memcpy(&session->bc_attrs, &res->bc_attrs,
8111 sizeof(session->bc_attrs));
8d35301d
AA		 8112}
8113
848f5bda
TM		 8114static int _nfs4_proc_create_session(struct nfs_client *clp,
8115 struct rpc_cred *cred)
fc931582
AA		 8116{
8117 struct nfs4_session *session = clp->cl_session;
8118 struct nfs41_create_session_args args = {
8119 .client = clp,
79969dd1
TM		 8120 .clientid = clp->cl_clientid,
8121 .seqid = clp->cl_seqid,
fc931582
AA		 8122 .cb_program = NFS4_CALLBACK,
8123 };
79969dd1
TM		 8124 struct nfs41_create_session_res res;
8125
fc931582
AA		 8126 struct rpc_message msg = {
8127 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
8128 .rpc_argp = &args,
8129 .rpc_resp = &res,
848f5bda 8130 .rpc_cred = cred,
fc931582
AA		 8131 };
8132 int status;
8133
6b26cc8c 8134 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
0f91421e 8135 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 8136
1bd714f2 8137 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 8138 trace_nfs4_create_session(clp, status);
fc931582 8139
b519d408
TM		 8140 switch (status) {
8141 case -NFS4ERR_STALE_CLIENTID:
8142 case -NFS4ERR_DELAY:
8143 case -ETIMEDOUT:
8144 case -EACCES:
8145 case -EAGAIN:
8146 goto out;
8147 };
8148
8149 clp->cl_seqid++;
43095d39 8150 if (!status) {
8d35301d 8151 /* Verify the session's negotiated channel_attrs values */
79969dd1 8152 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 8153 /* Increment the clientid slot sequence id */
79969dd1
TM		 8154 if (status)
8155 goto out;
8156 nfs4_update_session(session, &res);
fc931582 8157 }
79969dd1 8158out:
fc931582
AA		 8159 return status;
8160}
8161
8162/*
8163 * Issues a CREATE_SESSION operation to the server.
8164 * It is the responsibility of the caller to verify the session is
8165 * expired before calling this routine.
8166 */
848f5bda 8167int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 8168{
8169 int status;
8170 unsigned *ptr;
fc931582
AA		 8171 struct nfs4_session *session = clp->cl_session;
8172
8173 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
8174
848f5bda 8175 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 8176 if (status)
8177 goto out;
8178
aacd5537
AA		 8179 /* Init or reset the session slot tables */
8180 status = nfs4_setup_session_slot_tables(session);
8181 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 8182 if (status)
8183 goto out;
8184
8185 ptr = (unsigned *)&session->sess_id.data[0];
8186 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
8187 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 8188out:
8189 dprintk("<-- %s\n", __func__);
8190 return status;
8191}
8192
0f3e66c6
AA		 8193/*
8194 * Issue the over-the-wire RPC DESTROY_SESSION.
8195 * The caller must serialize access to this routine.
8196 */
848f5bda
TM		 8197int nfs4_proc_destroy_session(struct nfs4_session *session,
8198 struct rpc_cred *cred)
0f3e66c6 8199{
848f5bda
TM		 8200 struct rpc_message msg = {
8201 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
8202 .rpc_argp = session,
8203 .rpc_cred = cred,
8204 };
0f3e66c6 8205 int status = 0;
0f3e66c6
AA		 8206
8207 dprintk("--> nfs4_proc_destroy_session\n");
8208
8209 /* session is still being setup */
e11259f9
TM		 8210 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
8211 return 0;
0f3e66c6 8212
1bd714f2 8213 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 8214 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 8215
8216 if (status)
08106ac7 8217 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 8218 "Session has been destroyed regardless...\n", status);
8219
8220 dprintk("<-- nfs4_proc_destroy_session\n");
8221 return status;
8222}
8223
fc01cea9
AA		 8224/*
8225 * Renew the cl_session lease.
8226 */
d5f8d3fe
TM		 8227struct nfs4_sequence_data {
8228 struct nfs_client *clp;
8229 struct nfs4_sequence_args args;
8230 struct nfs4_sequence_res res;
8231};
8232
dc96aef9
AB		 8233static void nfs41_sequence_release(void *data)
8234{
d5f8d3fe
TM		 8235 struct nfs4_sequence_data *calldata = data;
8236 struct nfs_client *clp = calldata->clp;
dc96aef9 8237
212bf41d 8238 if (refcount_read(&clp->cl_count) > 1)
7135840f
AB		 8239 nfs4_schedule_state_renewal(clp);
8240 nfs_put_client(clp);
d5f8d3fe 8241 kfree(calldata);
dc96aef9
AB		 8242}
8243
aa5190d0
TM		 8244static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8245{
8246 switch(task->tk_status) {
8247 case -NFS4ERR_DELAY:
aa5190d0
TM		 8248 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8249 return -EAGAIN;
8250 default:
0400a6b0 8251 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 8252 }
8253 return 0;
8254}
8255
dc96aef9 8256static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 8257{
d5f8d3fe
TM		 8258 struct nfs4_sequence_data *calldata = data;
8259 struct nfs_client *clp = calldata->clp;
fc01cea9 8260
14516c3a
TM		 8261 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
8262 return;
fc01cea9 8263
c6d01c6f 8264 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 8265 if (task->tk_status < 0) {
8266 dprintk("%s ERROR %d\n", __func__, task->tk_status);
212bf41d 8267 if (refcount_read(&clp->cl_count) == 1)
7135840f 8268 goto out;
fc01cea9 8269
aa5190d0
TM		 8270 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
8271 rpc_restart_call_prepare(task);
fc01cea9
AA		 8272 return;
8273 }
8274 }
fc01cea9 8275 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 8276out:
fc01cea9
AA		 8277 dprintk("<-- %s\n", __func__);
8278}
8279
8280static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
8281{
d5f8d3fe
TM		 8282 struct nfs4_sequence_data *calldata = data;
8283 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 8284 struct nfs4_sequence_args *args;
8285 struct nfs4_sequence_res *res;
8286
fc01cea9
AA		 8287 args = task->tk_msg.rpc_argp;
8288 res = task->tk_msg.rpc_resp;
8289
7981c8a6 8290 nfs4_setup_sequence(clp, args, res, task);
fc01cea9
AA		 8291}
8292
8293static const struct rpc_call_ops nfs41_sequence_ops = {
8294 .rpc_call_done = nfs41_sequence_call_done,
8295 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 8296 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 8297};
8298
8fe72bac
TM		 8299static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
8300 struct rpc_cred *cred,
3be0f80b 8301 struct nfs4_slot *slot,
8fe72bac 8302 bool is_privileged)
fc01cea9 8303{
d5f8d3fe 8304 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 8305 struct rpc_message msg = {
8306 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
8307 .rpc_cred = cred,
8308 };
71ac6da9
TM		 8309 struct rpc_task_setup task_setup_data = {
8310 .rpc_client = clp->cl_rpcclient,
8311 .rpc_message = &msg,
8fe72bac 8312 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 8313 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 8314 };
3be0f80b 8315 struct rpc_task *ret;
fc01cea9 8316
3be0f80b 8317 ret = ERR_PTR(-EIO);
212bf41d 8318 if (!refcount_inc_not_zero(&clp->cl_count))
3be0f80b
TM		 8319 goto out_err;
8320
8321 ret = ERR_PTR(-ENOMEM);
dfb4f309 8322 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
3be0f80b
TM		 8323 if (calldata == NULL)
8324 goto out_put_clp;
a9c92d6b 8325 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
3be0f80b 8326 nfs4_sequence_attach_slot(&calldata->args, &calldata->res, slot);
8fe72bac
TM		 8327 if (is_privileged)
8328 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 8329 msg.rpc_argp = &calldata->args;
8330 msg.rpc_resp = &calldata->res;
8331 calldata->clp = clp;
71ac6da9 8332 task_setup_data.callback_data = calldata;
fc01cea9 8333
3be0f80b
TM		 8334 ret = rpc_run_task(&task_setup_data);
8335 if (IS_ERR(ret))
8336 goto out_err;
8337 return ret;
8338out_put_clp:
8339 nfs_put_client(clp);
8340out_err:
8341 nfs41_release_slot(slot);
8342 return ret;
71ac6da9
TM		 8343}
8344
2f60ea6b 8345static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 8346{
8347 struct rpc_task *task;
8348 int ret = 0;
8349
2f60ea6b 8350 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 8351 return -EAGAIN;
3be0f80b 8352 task = _nfs41_proc_sequence(clp, cred, NULL, false);
71ac6da9
TM		 8353 if (IS_ERR(task))
8354 ret = PTR_ERR(task);
8355 else
bf294b41 8356 rpc_put_task_async(task);
71ac6da9
TM		 8357 dprintk("<-- %s status=%d\n", __func__, ret);
8358 return ret;
8359}
8360
8361static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
8362{
8363 struct rpc_task *task;
8364 int ret;
8365
3be0f80b 8366 task = _nfs41_proc_sequence(clp, cred, NULL, true);
71ac6da9
TM		 8367 if (IS_ERR(task)) {
8368 ret = PTR_ERR(task);
8369 goto out;
8370 }
8371 ret = rpc_wait_for_completion_task(task);
be824167 8372 if (!ret)
71ac6da9
TM		 8373 ret = task->tk_status;
8374 rpc_put_task(task);
8375out:
8376 dprintk("<-- %s status=%d\n", __func__, ret);
8377 return ret;
fc01cea9
AA		 8378}
8379
fce5c838
RL		 8380struct nfs4_reclaim_complete_data {
8381 struct nfs_client *clp;
8382 struct nfs41_reclaim_complete_args arg;
8383 struct nfs41_reclaim_complete_res res;
8384};
8385
8386static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
8387{
8388 struct nfs4_reclaim_complete_data *calldata = data;
8389
7981c8a6 8390 nfs4_setup_sequence(calldata->clp,
d9afbd1b
TM		 8391 &calldata->arg.seq_args,
8392 &calldata->res.seq_res,
8393 task);
fce5c838
RL		 8394}
8395
aa5190d0
TM		 8396static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8397{
8398 switch(task->tk_status) {
8399 case 0:
8400 case -NFS4ERR_COMPLETE_ALREADY:
8401 case -NFS4ERR_WRONG_CRED: /* What to do here? */
8402 break;
8403 case -NFS4ERR_DELAY:
aa5190d0 8404 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 8405 /* fall through */
8406 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0 8407 return -EAGAIN;
0048fdd0
TM		 8408 case -NFS4ERR_BADSESSION:
8409 case -NFS4ERR_DEADSESSION:
8410 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
8411 nfs4_schedule_session_recovery(clp->cl_session,
8412 task->tk_status);
8413 break;
aa5190d0 8414 default:
0400a6b0 8415 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 8416 }
8417 return 0;
8418}
8419
fce5c838
RL		 8420static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
8421{
8422 struct nfs4_reclaim_complete_data *calldata = data;
8423 struct nfs_client *clp = calldata->clp;
8424 struct nfs4_sequence_res *res = &calldata->res.seq_res;
8425
8426 dprintk("--> %s\n", __func__);
14516c3a
TM		 8427 if (!nfs41_sequence_done(task, res))
8428 return;
fce5c838 8429
c6d01c6f 8430 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 8431 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
8432 rpc_restart_call_prepare(task);
8433 return;
8434 }
fce5c838
RL		 8435 dprintk("<-- %s\n", __func__);
8436}
8437
8438static void nfs4_free_reclaim_complete_data(void *data)
8439{
8440 struct nfs4_reclaim_complete_data *calldata = data;
8441
8442 kfree(calldata);
8443}
8444
8445static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
8446 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
8447 .rpc_call_done = nfs4_reclaim_complete_done,
8448 .rpc_release = nfs4_free_reclaim_complete_data,
8449};
8450
8451/*
8452 * Issue a global reclaim complete.
8453 */
965e9c23
TM		 8454static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
8455 struct rpc_cred *cred)
fce5c838
RL		 8456{
8457 struct nfs4_reclaim_complete_data *calldata;
8458 struct rpc_task *task;
8459 struct rpc_message msg = {
8460 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 8461 .rpc_cred = cred,
fce5c838
RL		 8462 };
8463 struct rpc_task_setup task_setup_data = {
8464 .rpc_client = clp->cl_rpcclient,
8465 .rpc_message = &msg,
8466 .callback_ops = &nfs4_reclaim_complete_call_ops,
8467 .flags = RPC_TASK_ASYNC,
8468 };
8469 int status = -ENOMEM;
8470
8471 dprintk("--> %s\n", __func__);
8535b2be 8472 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 8473 if (calldata == NULL)
8474 goto out;
8475 calldata->clp = clp;
8476 calldata->arg.one_fs = 0;
fce5c838 8477
a9c92d6b 8478 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 8479 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 8480 msg.rpc_argp = &calldata->arg;
8481 msg.rpc_resp = &calldata->res;
8482 task_setup_data.callback_data = calldata;
8483 task = rpc_run_task(&task_setup_data);
acf82b85 8484 if (IS_ERR(task)) {
fce5c838 8485 status = PTR_ERR(task);
acf82b85
DC		 8486 goto out;
8487 }
820bf85c 8488 status = rpc_wait_for_completion_task(task);
c34c32ea
AA		 8489 if (status == 0)
8490 status = task->tk_status;
fce5c838
RL		 8491 rpc_put_task(task);
8492out:
8493 dprintk("<-- %s status=%d\n", __func__, status);
8494 return status;
8495}
b1f69b75
AA		 8496
8497static void
8498nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
8499{
8500 struct nfs4_layoutget *lgp = calldata;
c31663d4 8501 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
b1f69b75
AA		 8502
8503 dprintk("--> %s\n", __func__);
7981c8a6 8504 nfs4_setup_sequence(server->nfs_client, &lgp->args.seq_args,
183d9e7b
JL		 8505 &lgp->res.seq_res, task);
8506 dprintk("<-- %s\n", __func__);
b1f69b75
AA		 8507}
8508
8509static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
8510{
8511 struct nfs4_layoutget *lgp = calldata;
183d9e7b
JL		 8512
8513 dprintk("--> %s\n", __func__);
2e80dbe7 8514 nfs41_sequence_process(task, &lgp->res.seq_res);
183d9e7b
JL		 8515 dprintk("<-- %s\n", __func__);
8516}
8517
8518static int
8519nfs4_layoutget_handle_exception(struct rpc_task *task,
8520 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
8521{
ee314c2a
TM		 8522 struct inode *inode = lgp->args.inode;
8523 struct nfs_server *server = NFS_SERVER(inode);
8524 struct pnfs_layout_hdr *lo;
e85d7ee4
TM		 8525 int nfs4err = task->tk_status;
8526 int err, status = 0;
f7db0b28 8527 LIST_HEAD(head);
b1f69b75 8528
ed7e5423 8529 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 8530
e85d7ee4 8531 switch (nfs4err) {
b1f69b75 8532 case 0:
ee314c2a 8533 goto out;
7c1e6e58
PT		 8534
8535 /*
8536 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
8537 * on the file. set tk_status to -ENODATA to tell upper layer to
8538 * retry go inband.
8539 */
8540 case -NFS4ERR_LAYOUTUNAVAILABLE:
183d9e7b 8541 status = -ENODATA;
7c1e6e58 8542 goto out;
21b874c8
TM		 8543 /*
8544 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
8545 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
8546 */
8547 case -NFS4ERR_BADLAYOUT:
183d9e7b
JL		 8548 status = -EOVERFLOW;
8549 goto out;
ed7e5423
BH		 8550 /*
8551 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
21b874c8
TM		 8552 * (or clients) writing to the same RAID stripe except when
8553 * the minlength argument is 0 (see RFC5661 section 18.43.3).
183d9e7b
JL		 8554 *
8555 * Treat it like we would RECALLCONFLICT -- we retry for a little
8556 * while, and then eventually give up.
ed7e5423 8557 */
b1f69b75 8558 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b
JL		 8559 if (lgp->args.minlength == 0) {
8560 status = -EOVERFLOW;
8561 goto out;
ed7e5423 8562 }
e85d7ee4
TM		 8563 status = -EBUSY;
8564 break;
183d9e7b 8565 case -NFS4ERR_RECALLCONFLICT:
183d9e7b 8566 status = -ERECALLCONFLICT;
e85d7ee4 8567 break;
26f47443
TM		 8568 case -NFS4ERR_DELEG_REVOKED:
8569 case -NFS4ERR_ADMIN_REVOKED:
ee314c2a
TM		 8570 case -NFS4ERR_EXPIRED:
8571 case -NFS4ERR_BAD_STATEID:
183d9e7b 8572 exception->timeout = 0;
ee314c2a 8573 spin_lock(&inode->i_lock);
f7db0b28
TM		 8574 lo = NFS_I(inode)->layout;
8575 /* If the open stateid was bad, then recover it. */
8576 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
e8fa33a6 8577 !nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) {
ee314c2a 8578 spin_unlock(&inode->i_lock);
183d9e7b 8579 exception->state = lgp->args.ctx->state;
26f47443 8580 exception->stateid = &lgp->args.stateid;
2259f960
TM		 8581 break;
8582 }
f7db0b28
TM		 8583
8584 /*
8585 * Mark the bad layout state as invalid, then retry
8586 */
668f455d 8587 pnfs_mark_layout_stateid_invalid(lo, &head);
f7db0b28 8588 spin_unlock(&inode->i_lock);
1f18b82c 8589 nfs_commit_inode(inode, 0);
f7db0b28
TM		 8590 pnfs_free_lseg_list(&head);
8591 status = -EAGAIN;
8592 goto out;
b1f69b75 8593 }
183d9e7b 8594
8ac09251 8595 nfs4_sequence_free_slot(&lgp->res.seq_res);
e85d7ee4
TM		 8596 err = nfs4_handle_exception(server, nfs4err, exception);
8597 if (!status) {
8598 if (exception->retry)
8599 status = -EAGAIN;
8600 else
8601 status = err;
8602 }
ee314c2a 8603out:
b1f69b75 8604 dprintk("<-- %s\n", __func__);
183d9e7b 8605 return status;
b1f69b75
AA		 8606}
8607
8554116e
IK		 8608static size_t max_response_pages(struct nfs_server *server)
8609{
8610 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
8611 return nfs_page_array_len(0, max_resp_sz);
8612}
8613
8614static void nfs4_free_pages(struct page **pages, size_t size)
8615{
8616 int i;
8617
8618 if (!pages)
8619 return;
8620
8621 for (i = 0; i < size; i++) {
8622 if (!pages[i])
8623 break;
8624 __free_page(pages[i]);
8625 }
8626 kfree(pages);
8627}
8628
8629static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
8630{
8631 struct page **pages;
8632 int i;
8633
8634 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
8635 if (!pages) {
8636 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
8637 return NULL;
8638 }
8639
8640 for (i = 0; i < size; i++) {
8641 pages[i] = alloc_page(gfp_flags);
8642 if (!pages[i]) {
8643 dprintk("%s: failed to allocate page\n", __func__);
8644 nfs4_free_pages(pages, size);
8645 return NULL;
8646 }
8647 }
8648
8649 return pages;
8650}
8651
b1f69b75
AA		 8652static void nfs4_layoutget_release(void *calldata)
8653{
8654 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 8655 struct inode *inode = lgp->args.inode;
8656 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8657 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8658
8659 dprintk("--> %s\n", __func__);
bd171930 8660 nfs4_sequence_free_slot(&lgp->res.seq_res);
8554116e 8661 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 8662 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 8663 put_nfs_open_context(lgp->args.ctx);
8664 kfree(calldata);
8665 dprintk("<-- %s\n", __func__);
8666}
8667
8668static const struct rpc_call_ops nfs4_layoutget_call_ops = {
8669 .rpc_call_prepare = nfs4_layoutget_prepare,
8670 .rpc_call_done = nfs4_layoutget_done,
8671 .rpc_release = nfs4_layoutget_release,
8672};
8673
a0b0a6e3 8674struct pnfs_layout_segment *
183d9e7b 8675nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags)
b1f69b75 8676{
a47970ff
WAA		 8677 struct inode *inode = lgp->args.inode;
8678 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8679 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8680 struct rpc_task *task;
8681 struct rpc_message msg = {
8682 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
8683 .rpc_argp = &lgp->args,
8684 .rpc_resp = &lgp->res,
6ab59344 8685 .rpc_cred = lgp->cred,
b1f69b75
AA		 8686 };
8687 struct rpc_task_setup task_setup_data = {
8688 .rpc_client = server->client,
8689 .rpc_message = &msg,
8690 .callback_ops = &nfs4_layoutget_call_ops,
8691 .callback_data = lgp,
8692 .flags = RPC_TASK_ASYNC,
8693 };
a0b0a6e3 8694 struct pnfs_layout_segment *lseg = NULL;
bc23676c
TM		 8695 struct nfs4_exception exception = {
8696 .inode = inode,
8697 .timeout = *timeout,
8698 };
b1f69b75
AA		 8699 int status = 0;
8700
8701 dprintk("--> %s\n", __func__);
8702
4bd5a980
PT		 8703 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
8704 pnfs_get_layout_hdr(NFS_I(inode)->layout);
8705
8554116e
IK		 8706 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
8707 if (!lgp->args.layout.pages) {
8708 nfs4_layoutget_release(lgp);
a0b0a6e3 8709 return ERR_PTR(-ENOMEM);
8554116e
IK		 8710 }
8711 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
8712
35124a09 8713 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 8714 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 8715 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 8716
b1f69b75
AA		 8717 task = rpc_run_task(&task_setup_data);
8718 if (IS_ERR(task))
a0b0a6e3 8719 return ERR_CAST(task);
820bf85c 8720 status = rpc_wait_for_completion_task(task);
183d9e7b
JL		 8721 if (status == 0) {
8722 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
8723 *timeout = exception.timeout;
8724 }
8725
1037e6ea
TM		 8726 trace_nfs4_layoutget(lgp->args.ctx,
8727 &lgp->args.range,
8728 &lgp->res.range,
48c9579a 8729 &lgp->res.stateid,
1037e6ea 8730 status);
183d9e7b 8731
085b7a45
WAA		 8732 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8733 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 8734 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 8735 rpc_put_task(task);
8736 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 8737 if (status)
8738 return ERR_PTR(status);
8739 return lseg;
b1f69b75
AA		 8740}
8741
cbe82603
BH		 8742static void
8743nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8744{
8745 struct nfs4_layoutreturn *lrp = calldata;
8746
8747 dprintk("--> %s\n", __func__);
7981c8a6 8748 nfs4_setup_sequence(lrp->clp,
d9afbd1b
TM		 8749 &lrp->args.seq_args,
8750 &lrp->res.seq_res,
8751 task);
cbe82603
BH		 8752}
8753
8754static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8755{
8756 struct nfs4_layoutreturn *lrp = calldata;
8757 struct nfs_server *server;
8758
8759 dprintk("--> %s\n", __func__);
8760
2e80dbe7 8761 if (!nfs41_sequence_process(task, &lrp->res.seq_res))
cbe82603
BH		 8762 return;
8763
8764 server = NFS_SERVER(lrp->args.inode);
f22e5edd 8765 switch (task->tk_status) {
ff90514e
TM		 8766 case -NFS4ERR_OLD_STATEID:
8767 if (nfs4_refresh_layout_stateid(&lrp->args.stateid,
8768 lrp->args.inode))
8769 goto out_restart;
8770 /* Fallthrough */
f22e5edd
TM		 8771 default:
8772 task->tk_status = 0;
ff90514e 8773 /* Fallthrough */
f22e5edd
TM		 8774 case 0:
8775 break;
8776 case -NFS4ERR_DELAY:
8478eaa1 8777 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 8778 break;
ff90514e 8779 goto out_restart;
cbe82603 8780 }
cbe82603 8781 dprintk("<-- %s\n", __func__);
ff90514e
TM		 8782 return;
8783out_restart:
8784 task->tk_status = 0;
8785 nfs4_sequence_free_slot(&lrp->res.seq_res);
8786 rpc_restart_call_prepare(task);
cbe82603
BH		 8787}
8788
8789static void nfs4_layoutreturn_release(void *calldata)
8790{
8791 struct nfs4_layoutreturn *lrp = calldata;
849b286f 8792 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 8793
8794 dprintk("--> %s\n", __func__);
2a974425 8795 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range,
68f74479 8796 lrp->res.lrs_present ? &lrp->res.stateid : NULL);
2e80dbe7 8797 nfs4_sequence_free_slot(&lrp->res.seq_res);
4d796d75
TM		 8798 if (lrp->ld_private.ops && lrp->ld_private.ops->free)
8799 lrp->ld_private.ops->free(&lrp->ld_private);
2f065ddb
TM		 8800 pnfs_put_layout_hdr(lrp->args.layout);
8801 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 8802 kfree(calldata);
8803 dprintk("<-- %s\n", __func__);
8804}
8805
8806static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8807 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8808 .rpc_call_done = nfs4_layoutreturn_done,
8809 .rpc_release = nfs4_layoutreturn_release,
8810};
8811
6c16605d 8812int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 8813{
8814 struct rpc_task *task;
8815 struct rpc_message msg = {
8816 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8817 .rpc_argp = &lrp->args,
8818 .rpc_resp = &lrp->res,
9556000d 8819 .rpc_cred = lrp->cred,
cbe82603
BH		 8820 };
8821 struct rpc_task_setup task_setup_data = {
1771c577 8822 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8823 .rpc_message = &msg,
8824 .callback_ops = &nfs4_layoutreturn_call_ops,
8825 .callback_data = lrp,
8826 };
6c16605d 8827 int status = 0;
cbe82603 8828
99ade3c7
AE		 8829 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
8830 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
8831 &task_setup_data.rpc_client, &msg);
8832
cbe82603 8833 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8834 if (!sync) {
8835 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8836 if (!lrp->inode) {
8837 nfs4_layoutreturn_release(lrp);
8838 return -EAGAIN;
8839 }
8840 task_setup_data.flags |= RPC_TASK_ASYNC;
8841 }
a9c92d6b 8842 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8843 task = rpc_run_task(&task_setup_data);
8844 if (IS_ERR(task))
8845 return PTR_ERR(task);
5a0ec8ac
TM		 8846 if (sync)
8847 status = task->tk_status;
48c9579a 8848 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
cbe82603
BH		 8849 dprintk("<-- %s status=%d\n", __func__, status);
8850 rpc_put_task(task);
8851 return status;
8852}
8853
b1f69b75 8854static int
cd5875fe
TM		 8855_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8856 struct pnfs_device *pdev,
8857 struct rpc_cred *cred)
b1f69b75
AA		 8858{
8859 struct nfs4_getdeviceinfo_args args = {
8860 .pdev = pdev,
4e590803
TM		 8861 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8862 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8863 };
8864 struct nfs4_getdeviceinfo_res res = {
8865 .pdev = pdev,
8866 };
8867 struct rpc_message msg = {
8868 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8869 .rpc_argp = &args,
8870 .rpc_resp = &res,
cd5875fe 8871 .rpc_cred = cred,
b1f69b75
AA		 8872 };
8873 int status;
8874
8875 dprintk("--> %s\n", __func__);
7c513058 8876 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8877 if (res.notification & ~args.notify_types)
8878 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8879 if (res.notification != args.notify_types)
8880 pdev->nocache = 1;
4e590803 8881
b1f69b75
AA		 8882 dprintk("<-- %s status=%d\n", __func__, status);
8883
8884 return status;
8885}
8886
cd5875fe
TM		 8887int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8888 struct pnfs_device *pdev,
8889 struct rpc_cred *cred)
b1f69b75
AA		 8890{
8891 struct nfs4_exception exception = { };
8892 int err;
8893
8894 do {
8895 err = nfs4_handle_exception(server,
cd5875fe 8896 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8897 &exception);
8898 } while (exception.retry);
8899 return err;
8900}
8901EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8902
863a3c6c
AA		 8903static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8904{
8905 struct nfs4_layoutcommit_data *data = calldata;
8906 struct nfs_server *server = NFS_SERVER(data->args.inode);
8907
7981c8a6 8908 nfs4_setup_sequence(server->nfs_client,
d9afbd1b
TM		 8909 &data->args.seq_args,
8910 &data->res.seq_res,
8911 task);
863a3c6c
AA		 8912}
8913
8914static void
8915nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8916{
8917 struct nfs4_layoutcommit_data *data = calldata;
8918 struct nfs_server *server = NFS_SERVER(data->args.inode);
8919
6ba7db34 8920 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8921 return;
8922
8923 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8924 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8925 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8926 case -NFS4ERR_BADLAYOUT: /* no layout */
8927 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8928 task->tk_status = 0;
e59d27e0 8929 case 0:
e59d27e0
TM		 8930 break;
8931 default:
8478eaa1 8932 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8933 rpc_restart_call_prepare(task);
8934 return;
8935 }
8936 }
863a3c6c
AA		 8937}
8938
8939static void nfs4_layoutcommit_release(void *calldata)
8940{
8941 struct nfs4_layoutcommit_data *data = calldata;
8942
db29c089 8943 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8944 nfs_post_op_update_inode_force_wcc(data->args.inode,
8945 data->res.fattr);
863a3c6c 8946 put_rpccred(data->cred);
472e2594 8947 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8948 kfree(data);
8949}
8950
8951static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8952 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8953 .rpc_call_done = nfs4_layoutcommit_done,
8954 .rpc_release = nfs4_layoutcommit_release,
8955};
8956
8957int
ef311537 8958nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8959{
8960 struct rpc_message msg = {
8961 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8962 .rpc_argp = &data->args,
8963 .rpc_resp = &data->res,
8964 .rpc_cred = data->cred,
8965 };
8966 struct rpc_task_setup task_setup_data = {
8967 .task = &data->task,
8968 .rpc_client = NFS_CLIENT(data->args.inode),
8969 .rpc_message = &msg,
8970 .callback_ops = &nfs4_layoutcommit_ops,
8971 .callback_data = data,
863a3c6c
AA		 8972 };
8973 struct rpc_task *task;
8974 int status = 0;
8975
b4839ebe
KM		 8976 dprintk("NFS: initiating layoutcommit call. sync %d "
8977 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8978 data->args.lastbytewritten,
8979 data->args.inode->i_ino);
8980
472e2594
TM		 8981 if (!sync) {
8982 data->inode = nfs_igrab_and_active(data->args.inode);
8983 if (data->inode == NULL) {
8984 nfs4_layoutcommit_release(data);
8985 return -EAGAIN;
8986 }
8987 task_setup_data.flags = RPC_TASK_ASYNC;
8988 }
a9c92d6b 8989 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8990 task = rpc_run_task(&task_setup_data);
8991 if (IS_ERR(task))
8992 return PTR_ERR(task);
472e2594
TM		 8993 if (sync)
8994 status = task->tk_status;
48c9579a 8995 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
863a3c6c
AA		 8996 dprintk("%s: status %d\n", __func__, status);
8997 rpc_put_task(task);
8998 return status;
8999}
fca78d6d 9000
97431204
AA		 9001/**
9002 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
9003 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
9004 */
fca78d6d
BS		 9005static int
9006_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 9007 struct nfs_fsinfo *info,
9008 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 9009{
9010 struct nfs41_secinfo_no_name_args args = {
9011 .style = SECINFO_STYLE_CURRENT_FH,
9012 };
9013 struct nfs4_secinfo_res res = {
9014 .flavors = flavors,
9015 };
9016 struct rpc_message msg = {
9017 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
9018 .rpc_argp = &args,
9019 .rpc_resp = &res,
9020 };
b1b3e136 9021 struct rpc_clnt *clnt = server->client;
7cb852df 9022 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 9023 int status;
9024
9025 if (use_integrity) {
9026 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 9027 cred = nfs4_get_clid_cred(server->nfs_client);
9028 msg.rpc_cred = cred;
b1b3e136
WAA		 9029 }
9030
9031 dprintk("--> %s\n", __func__);
9032 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
9033 &res.seq_res, 0);
9034 dprintk("<-- %s status=%d\n", __func__, status);
9035
7cb852df
WAA		 9036 if (cred)
9037 put_rpccred(cred);
b1b3e136
WAA		 9038
9039 return status;
fca78d6d
BS		 9040}
9041
9042static int
9043nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
9044 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
9045{
9046 struct nfs4_exception exception = { };
9047 int err;
9048 do {
b1b3e136
WAA		 9049 /* first try using integrity protection */
9050 err = -NFS4ERR_WRONGSEC;
9051
9052 /* try to use integrity protection with machine cred */
9053 if (_nfs4_is_integrity_protected(server->nfs_client))
9054 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
9055 flavors, true);
9056
9057 /*
9058 * if unable to use integrity protection, or SECINFO with
9059 * integrity protection returns NFS4ERR_WRONGSEC (which is
9060 * disallowed by spec, but exists in deployed servers) use
9061 * the current filesystem's rpc_client and the user cred.
9062 */
9063 if (err == -NFS4ERR_WRONGSEC)
9064 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
9065 flavors, false);
9066
fca78d6d
BS		 9067 switch (err) {
9068 case 0:
9069 case -NFS4ERR_WRONGSEC:
78b19bae 9070 case -ENOTSUPP:
05e9cfb4 9071 goto out;
fca78d6d
BS		 9072 default:
9073 err = nfs4_handle_exception(server, err, &exception);
9074 }
9075 } while (exception.retry);
05e9cfb4 9076out:
fca78d6d
BS		 9077 return err;
9078}
9079
9080static int
9081nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
9082 struct nfs_fsinfo *info)
9083{
9084 int err;
9085 struct page *page;
367156d9 9086 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 9087 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 9088 struct nfs4_secinfo4 *secinfo;
9089 int i;
fca78d6d
BS		 9090
9091 page = alloc_page(GFP_KERNEL);
9092 if (!page) {
9093 err = -ENOMEM;
9094 goto out;
9095 }
9096
9097 flavors = page_address(page);
9098 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
9099
9100 /*
9101 * Fall back on "guess and check" method if
9102 * the server doesn't support SECINFO_NO_NAME
9103 */
78b19bae 9104 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 9105 err = nfs4_find_root_sec(server, fhandle, info);
9106 goto out_freepage;
9107 }
9108 if (err)
9109 goto out_freepage;
9110
58a8cf12
WAA		 9111 for (i = 0; i < flavors->num_flavors; i++) {
9112 secinfo = &flavors->flavors[i];
9113
9114 switch (secinfo->flavor) {
9115 case RPC_AUTH_NULL:
9116 case RPC_AUTH_UNIX:
9117 case RPC_AUTH_GSS:
9118 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
9119 &secinfo->flavor_info);
9120 break;
9121 default:
9122 flavor = RPC_AUTH_MAXFLAVOR;
9123 break;
9124 }
9125
4d4b69dd
WAA		 9126 if (!nfs_auth_info_match(&server->auth_info, flavor))
9127 flavor = RPC_AUTH_MAXFLAVOR;
9128
58a8cf12
WAA		 9129 if (flavor != RPC_AUTH_MAXFLAVOR) {
9130 err = nfs4_lookup_root_sec(server, fhandle,
9131 info, flavor);
9132 if (!err)
9133 break;
9134 }
9135 }
9136
9137 if (flavor == RPC_AUTH_MAXFLAVOR)
9138 err = -EPERM;
fca78d6d
BS		 9139
9140out_freepage:
9141 put_page(page);
9142 if (err == -EACCES)
9143 return -EPERM;
9144out:
9145 return err;
9146}
1cab0652 9147
ab7cb0df
TM		 9148static int _nfs41_test_stateid(struct nfs_server *server,
9149 nfs4_stateid *stateid,
9150 struct rpc_cred *cred)
7d974794
BS		 9151{
9152 int status;
9153 struct nfs41_test_stateid_args args = {
1cab0652 9154 .stateid = stateid,
7d974794
BS		 9155 };
9156 struct nfs41_test_stateid_res res;
9157 struct rpc_message msg = {
9158 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
9159 .rpc_argp = &args,
9160 .rpc_resp = &res,
ab7cb0df 9161 .rpc_cred = cred,
7d974794 9162 };
3787d506
WAA		 9163 struct rpc_clnt *rpc_client = server->client;
9164
9165 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9166 &rpc_client, &msg);
1cab0652 9167
38527b15 9168 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 9169 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 9170 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 9171 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 9172 &args.seq_args, &res.seq_res);
38527b15
CL		 9173 if (status != NFS_OK) {
9174 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 9175 return status;
38527b15
CL		 9176 }
9177 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 9178 return -res.status;
7d974794
BS		 9179}
9180
43912bbb
TM		 9181static void nfs4_handle_delay_or_session_error(struct nfs_server *server,
9182 int err, struct nfs4_exception *exception)
9183{
9184 exception->retry = 0;
9185 switch(err) {
9186 case -NFS4ERR_DELAY:
76e8a1bd 9187 case -NFS4ERR_RETRY_UNCACHED_REP:
43912bbb
TM		 9188 nfs4_handle_exception(server, err, exception);
9189 break;
9190 case -NFS4ERR_BADSESSION:
9191 case -NFS4ERR_BADSLOT:
9192 case -NFS4ERR_BAD_HIGH_SLOT:
9193 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
9194 case -NFS4ERR_DEADSESSION:
9195 nfs4_do_handle_exception(server, err, exception);
9196 }
9197}
9198
38527b15
CL		 9199/**
9200 * nfs41_test_stateid - perform a TEST_STATEID operation
9201 *
9202 * @server: server / transport on which to perform the operation
9203 * @stateid: state ID to test
ab7cb0df 9204 * @cred: credential
38527b15
CL		 9205 *
9206 * Returns NFS_OK if the server recognizes that "stateid" is valid.
9207 * Otherwise a negative NFS4ERR value is returned if the operation
9208 * failed or the state ID is not currently valid.
9209 */
ab7cb0df
TM		 9210static int nfs41_test_stateid(struct nfs_server *server,
9211 nfs4_stateid *stateid,
9212 struct rpc_cred *cred)
7d974794
BS		 9213{
9214 struct nfs4_exception exception = { };
9215 int err;
9216 do {
ab7cb0df 9217 err = _nfs41_test_stateid(server, stateid, cred);
43912bbb 9218 nfs4_handle_delay_or_session_error(server, err, &exception);
7d974794
BS		 9219 } while (exception.retry);
9220 return err;
9221}
9aeda35f 9222
7c1d5fae
TM		 9223struct nfs_free_stateid_data {
9224 struct nfs_server *server;
9225 struct nfs41_free_stateid_args args;
9aeda35f 9226 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 9227};
9228
9229static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
9230{
9231 struct nfs_free_stateid_data *data = calldata;
7981c8a6 9232 nfs4_setup_sequence(data->server->nfs_client,
7c1d5fae
TM		 9233 &data->args.seq_args,
9234 &data->res.seq_res,
9235 task);
9236}
9237
9238static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
9239{
9240 struct nfs_free_stateid_data *data = calldata;
9241
9242 nfs41_sequence_done(task, &data->res.seq_res);
9243
9244 switch (task->tk_status) {
9245 case -NFS4ERR_DELAY:
8478eaa1 9246 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 9247 rpc_restart_call_prepare(task);
9248 }
9249}
9250
9251static void nfs41_free_stateid_release(void *calldata)
9252{
9253 kfree(calldata);
9254}
9255
17f26b12 9256static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 9257 .rpc_call_prepare = nfs41_free_stateid_prepare,
9258 .rpc_call_done = nfs41_free_stateid_done,
9259 .rpc_release = nfs41_free_stateid_release,
9260};
9261
9262static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
f0b0bf88 9263 const nfs4_stateid *stateid,
ab7cb0df 9264 struct rpc_cred *cred,
7c1d5fae
TM		 9265 bool privileged)
9266{
9aeda35f
BS		 9267 struct rpc_message msg = {
9268 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 9269 .rpc_cred = cred,
9aeda35f 9270 };
7c1d5fae
TM		 9271 struct rpc_task_setup task_setup = {
9272 .rpc_client = server->client,
9273 .rpc_message = &msg,
9274 .callback_ops = &nfs41_free_stateid_ops,
9275 .flags = RPC_TASK_ASYNC,
9276 };
9277 struct nfs_free_stateid_data *data;
9aeda35f 9278
3787d506
WAA		 9279 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9280 &task_setup.rpc_client, &msg);
9281
38527b15 9282 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 9283 data = kmalloc(sizeof(*data), GFP_NOFS);
9284 if (!data)
9285 return ERR_PTR(-ENOMEM);
9286 data->server = server;
9287 nfs4_stateid_copy(&data->args.stateid, stateid);
9288
9289 task_setup.callback_data = data;
9290
9291 msg.rpc_argp = &data->args;
9292 msg.rpc_resp = &data->res;
76e8a1bd 9293 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
7c1d5fae
TM		 9294 if (privileged)
9295 nfs4_set_sequence_privileged(&data->args.seq_args);
9296
9297 return rpc_run_task(&task_setup);
9aeda35f
BS		 9298}
9299
38527b15
CL		 9300/**
9301 * nfs41_free_stateid - perform a FREE_STATEID operation
9302 *
9303 * @server: server / transport on which to perform the operation
9304 * @stateid: state ID to release
ab7cb0df 9305 * @cred: credential
f0b0bf88 9306 * @is_recovery: set to true if this call needs to be privileged
38527b15 9307 *
f0b0bf88 9308 * Note: this function is always asynchronous.
38527b15 9309 */
ab7cb0df 9310static int nfs41_free_stateid(struct nfs_server *server,
f0b0bf88
TM		 9311 const nfs4_stateid *stateid,
9312 struct rpc_cred *cred,
9313 bool is_recovery)
9aeda35f 9314{
7c1d5fae 9315 struct rpc_task *task;
7c1d5fae 9316
f0b0bf88 9317 task = _nfs41_free_stateid(server, stateid, cred, is_recovery);
7c1d5fae
TM		 9318 if (IS_ERR(task))
9319 return PTR_ERR(task);
7c1d5fae 9320 rpc_put_task(task);
f0b0bf88 9321 return 0;
9aeda35f 9322}
36281caa 9323
f1cdae87
JL		 9324static void
9325nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf 9326{
ab7cb0df 9327 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 9328
f0b0bf88 9329 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf 9330 nfs4_free_lock_state(server, lsp);
c8b2d0bf
TM		 9331}
9332
36281caa
TM		 9333static bool nfs41_match_stateid(const nfs4_stateid *s1,
9334 const nfs4_stateid *s2)
9335{
93b717fd
TM		 9336 if (s1->type != s2->type)
9337 return false;
9338
2d2f24ad 9339 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 9340 return false;
9341
2d2f24ad 9342 if (s1->seqid == s2->seqid)
36281caa 9343 return true;
36281caa 9344
045c5519 9345 return s1->seqid == 0 || s2->seqid == 0;
36281caa
TM		 9346}
9347
557134a3
AA		 9348#endif /* CONFIG_NFS_V4_1 */
9349
36281caa
TM		 9350static bool nfs4_match_stateid(const nfs4_stateid *s1,
9351 const nfs4_stateid *s2)
9352{
f597c537 9353 return nfs4_stateid_match(s1, s2);
36281caa
TM		 9354}
9355
9356
17280175 9357static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 9358 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 9359 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 9360 .recover_open = nfs4_open_reclaim,
9361 .recover_lock = nfs4_lock_reclaim,
591d71cb 9362 .establish_clid = nfs4_init_clientid,
05f4c350 9363 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 9364};
9365
591d71cb 9366#if defined(CONFIG_NFS_V4_1)
17280175 9367static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 9368 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9369 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9370 .recover_open = nfs4_open_reclaim,
9371 .recover_lock = nfs4_lock_reclaim,
4d643d1d 9372 .establish_clid = nfs41_init_clientid,
fce5c838 9373 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 9374 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 9375};
9376#endif /* CONFIG_NFS_V4_1 */
9377
17280175 9378static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 9379 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9380 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 9381 .recover_open = nfs40_open_expired,
591d71cb
AA		 9382 .recover_lock = nfs4_lock_expired,
9383 .establish_clid = nfs4_init_clientid,
9384};
9385
9386#if defined(CONFIG_NFS_V4_1)
17280175 9387static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 9388 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 9389 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 9390 .recover_open = nfs41_open_expired,
9391 .recover_lock = nfs41_lock_expired,
4d643d1d 9392 .establish_clid = nfs41_init_clientid,
1da177e4 9393};
591d71cb 9394#endif /* CONFIG_NFS_V4_1 */
1da177e4 9395
17280175 9396static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 9397 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 9398 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 9399 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 9400};
9401
9402#if defined(CONFIG_NFS_V4_1)
17280175 9403static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 9404 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 9405 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 9406 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 9407};
9408#endif
9409
ec011fe8 9410static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 9411 .get_locations = _nfs40_proc_get_locations,
44c99933 9412 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 9413};
9414
9415#if defined(CONFIG_NFS_V4_1)
9416static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 9417 .get_locations = _nfs41_proc_get_locations,
44c99933 9418 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 9419};
9420#endif /* CONFIG_NFS_V4_1 */
9421
97dc1359
TM		 9422static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
9423 .minor_version = 0,
39c6daae
TM		 9424 .init_caps = NFS_CAP_READDIRPLUS
9425 | NFS_CAP_ATOMIC_OPEN
39c6daae 9426 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 9427 .init_client = nfs40_init_client,
9428 .shutdown_client = nfs40_shutdown_client,
36281caa 9429 .match_stateid = nfs4_match_stateid,
fca78d6d 9430 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 9431 .free_lock_state = nfs4_release_lockowner,
45870d69 9432 .test_and_free_expired = nfs40_test_and_free_expired_stateid,
63f5f796 9433 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 9434 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 9435 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
9436 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
9437 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 9438 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 9439};
9440
9441#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 9442static struct nfs_seqid *
9443nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
9444{
9445 return NULL;
9446}
9447
97dc1359
TM		 9448static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
9449 .minor_version = 1,
39c6daae
TM		 9450 .init_caps = NFS_CAP_READDIRPLUS
9451 | NFS_CAP_ATOMIC_OPEN
3b66486c 9452 | NFS_CAP_POSIX_LOCK
49f9a0fa 9453 | NFS_CAP_STATEID_NFSV41
e983120e 9454 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 9455 .init_client = nfs41_init_client,
9456 .shutdown_client = nfs41_shutdown_client,
36281caa 9457 .match_stateid = nfs41_match_stateid,
fca78d6d 9458 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 9459 .free_lock_state = nfs41_free_lock_state,
45870d69 9460 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 9461 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 9462 .session_trunk = nfs4_test_session_trunk,
9915ea7e 9463 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 9464 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9465 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9466 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 9467 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 9468};
9469#endif
9470
42c2c424
SD		 9471#if defined(CONFIG_NFS_V4_2)
9472static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
9473 .minor_version = 2,
7017310a
BS		 9474 .init_caps = NFS_CAP_READDIRPLUS
9475 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 9476 | NFS_CAP_POSIX_LOCK
9477 | NFS_CAP_STATEID_NFSV41
e983120e 9478 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 9479 | NFS_CAP_ALLOCATE
2e72448b 9480 | NFS_CAP_COPY
624bd5b7 9481 | NFS_CAP_DEALLOCATE
6c5a0d89 9482 | NFS_CAP_SEEK
e5341f3a
PT		 9483 | NFS_CAP_LAYOUTSTATS
9484 | NFS_CAP_CLONE,
abf79bb3
CL		 9485 .init_client = nfs41_init_client,
9486 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 9487 .match_stateid = nfs41_match_stateid,
9488 .find_root_sec = nfs41_find_root_sec,
7017310a 9489 .free_lock_state = nfs41_free_lock_state,
9915ea7e 9490 .call_sync_ops = &nfs41_call_sync_ops,
45870d69 9491 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 9492 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 9493 .session_trunk = nfs4_test_session_trunk,
42c2c424
SD		 9494 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9495 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9496 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 9497 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 9498};
9499#endif
9500
97dc1359
TM		 9501const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
9502 [0] = &nfs_v4_0_minor_ops,
9503#if defined(CONFIG_NFS_V4_1)
9504 [1] = &nfs_v4_1_minor_ops,
9505#endif
42c2c424
SD		 9506#if defined(CONFIG_NFS_V4_2)
9507 [2] = &nfs_v4_2_minor_ops,
9508#endif
97dc1359
TM		 9509};
9510
13997823 9511static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
c4803c49
AG		 9512{
9513 ssize_t error, error2;
9514
9515 error = generic_listxattr(dentry, list, size);
9516 if (error < 0)
9517 return error;
9518 if (list) {
9519 list += error;
9520 size -= error;
9521 }
9522
9523 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
9524 if (error2 < 0)
9525 return error2;
9526 return error + error2;
9527}
9528
17f26b12 9529static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 9530 .create = nfs_create,
9531 .lookup = nfs_lookup,
9532 .atomic_open = nfs_atomic_open,
9533 .link = nfs_link,
9534 .unlink = nfs_unlink,
9535 .symlink = nfs_symlink,
9536 .mkdir = nfs_mkdir,
9537 .rmdir = nfs_rmdir,
9538 .mknod = nfs_mknod,
9539 .rename = nfs_rename,
9540 .permission = nfs_permission,
9541 .getattr = nfs_getattr,
9542 .setattr = nfs_setattr,
c4803c49 9543 .listxattr = nfs4_listxattr,
73a79706
BS		 9544};
9545
92e1d5be 9546static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 9547 .permission = nfs_permission,
9548 .getattr = nfs_getattr,
9549 .setattr = nfs_setattr,
c4803c49 9550 .listxattr = nfs4_listxattr,
6b3b5496
BF		 9551};
9552
509de811 9553const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 9554 .version = 4, /* protocol version */
9555 .dentry_ops = &nfs4_dentry_operations,
9556 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 9557 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 9558 .file_ops = &nfs4_file_operations,
1da177e4 9559 .getroot = nfs4_proc_get_root,
281cad46 9560 .submount = nfs4_submount,
ff9099f2 9561 .try_mount = nfs4_try_mount,
1da177e4
LT		 9562 .getattr = nfs4_proc_getattr,
9563 .setattr = nfs4_proc_setattr,
9564 .lookup = nfs4_proc_lookup,
5b5faaf6 9565 .lookupp = nfs4_proc_lookupp,
1da177e4
LT		 9566 .access = nfs4_proc_access,
9567 .readlink = nfs4_proc_readlink,
1da177e4
LT		 9568 .create = nfs4_proc_create,
9569 .remove = nfs4_proc_remove,
9570 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 9571 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 9572 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 9573 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 9574 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 9575 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 9576 .link = nfs4_proc_link,
9577 .symlink = nfs4_proc_symlink,
9578 .mkdir = nfs4_proc_mkdir,
9579 .rmdir = nfs4_proc_remove,
9580 .readdir = nfs4_proc_readdir,
9581 .mknod = nfs4_proc_mknod,
9582 .statfs = nfs4_proc_statfs,
9583 .fsinfo = nfs4_proc_fsinfo,
9584 .pathconf = nfs4_proc_pathconf,
e9326dca 9585 .set_capabilities = nfs4_server_capabilities,
1da177e4 9586 .decode_dirent = nfs4_decode_dirent,
a4cdda59 9587 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 9588 .read_setup = nfs4_proc_read_setup,
ec06c096 9589 .read_done = nfs4_read_done,
1da177e4 9590 .write_setup = nfs4_proc_write_setup,
788e7a89 9591 .write_done = nfs4_write_done,
1da177e4 9592 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 9593 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 9594 .commit_done = nfs4_commit_done,
1da177e4 9595 .lock = nfs4_proc_lock,
e50a1c2e 9596 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 9597 .close_context = nfs4_close_context,
2b484297 9598 .open_context = nfs4_atomic_open,
011e2a7f 9599 .have_delegation = nfs4_have_delegation,
57ec14c5 9600 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 9601 .alloc_client = nfs4_alloc_client,
45a52a02 9602 .init_client = nfs4_init_client,
cdb7eced 9603 .free_client = nfs4_free_client,
1179acc6
BS		 9604 .create_server = nfs4_create_server,
9605 .clone_server = nfs_clone_server,
1da177e4
LT		 9606};
9607
64c2ce8b 9608static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
98e9cb57 9609 .name = XATTR_NAME_NFSV4_ACL,
64c2ce8b
AK		 9610 .list = nfs4_xattr_list_nfs4_acl,
9611 .get = nfs4_xattr_get_nfs4_acl,
9612 .set = nfs4_xattr_set_nfs4_acl,
9613};
9614
9615const struct xattr_handler *nfs4_xattr_handlers[] = {
9616 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 9617#ifdef CONFIG_NFS_V4_SECURITY_LABEL
9618 &nfs4_xattr_nfs4_label_handler,
9619#endif
64c2ce8b
AK		 9620 NULL
9621};
9622
1da177e4
LT		 9623/*
9624 * Local variables:
9625 * c-basic-offset: 8
9626 * End:
9627 */
Linux 6.x block layer and io_uring tree(s)