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NFSv4: Add a generic structure for managing layout-private information
[mirror_ubuntu-bionic-kernel.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>
feaff8e5 41#include <linux/file.h>
1da177e4 42#include <linux/string.h>
652f89f6
TM		 43#include <linux/ratelimit.h>
44#include <linux/printk.h>
5a0e3ad6 45#include <linux/slab.h>
1da177e4
LT		 46#include <linux/sunrpc/clnt.h>
47#include <linux/nfs.h>
48#include <linux/nfs4.h>
49#include <linux/nfs_fs.h>
50#include <linux/nfs_page.h>
9b7160c5 51#include <linux/nfs_mount.h>
1da177e4 52#include <linux/namei.h>
02a913a7 53#include <linux/mount.h>
99fe60d0 54#include <linux/module.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
40c64c26 66#include "nfs4idmap.h"
73e39aaa 67#include "nfs4session.h"
de242c0b 68#include "fscache.h"
1da177e4 69
c6d01c6f
TM		 70#include "nfs4trace.h"
71
1da177e4
LT		 72#define NFSDBG_FACILITY NFSDBG_PROC
73
2066fe89 74#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 75#define NFS4_POLL_RETRY_MAX (15*HZ)
76
a1d1c4f1
TM		 77/* file attributes which can be mapped to nfs attributes */
78#define NFS4_VALID_ATTRS (ATTR_MODE \
79 | ATTR_UID \
80 | ATTR_GID \
81 | ATTR_SIZE \
82 | ATTR_ATIME \
83 | ATTR_MTIME \
84 | ATTR_CTIME \
85 | ATTR_ATIME_SET \
86 | ATTR_MTIME_SET)
87
cdd4e68b 88struct nfs4_opendata;
864472e9 89static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 90static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 91static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
81934ddb 92static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 93static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
94static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 95static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
96 struct nfs_fattr *fattr, struct iattr *sattr,
29b59f94 97 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
1775fd3e 98 struct nfs4_label *olabel);
f062eb6c 99#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 100static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
101 struct rpc_cred *);
f0b0bf88
TM		 102static int nfs41_free_stateid(struct nfs_server *, const nfs4_stateid *,
103 struct rpc_cred *, bool);
f062eb6c 104#endif
aa9c2669
DQ		 105
106#ifdef CONFIG_NFS_V4_SECURITY_LABEL
107static inline struct nfs4_label *
108nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
109 struct iattr *sattr, struct nfs4_label *label)
110{
111 int err;
112
113 if (label == NULL)
114 return NULL;
115
116 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
117 return NULL;
118
aa9c2669
DQ		 119 err = security_dentry_init_security(dentry, sattr->ia_mode,
120 &dentry->d_name, (void **)&label->label, &label->len);
121 if (err == 0)
122 return label;
123
124 return NULL;
125}
126static inline void
127nfs4_label_release_security(struct nfs4_label *label)
128{
129 if (label)
130 security_release_secctx(label->label, label->len);
131}
132static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
133{
134 if (label)
135 return server->attr_bitmask;
136
137 return server->attr_bitmask_nl;
138}
139#else
140static inline struct nfs4_label *
141nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
142 struct iattr *sattr, struct nfs4_label *l)
143{ return NULL; }
144static inline void
145nfs4_label_release_security(struct nfs4_label *label)
146{ return; }
147static inline u32 *
148nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
149{ return server->attr_bitmask; }
150#endif
151
1da177e4 152/* Prevent leaks of NFSv4 errors into userland */
46f72f57 153static int nfs4_map_errors(int err)
1da177e4 154{
52567b03
TM		 155 if (err >= -1000)
156 return err;
157 switch (err) {
158 case -NFS4ERR_RESOURCE:
30005121
WAA		 159 case -NFS4ERR_LAYOUTTRYLATER:
160 case -NFS4ERR_RECALLCONFLICT:
52567b03 161 return -EREMOTEIO;
7ebb9315 162 case -NFS4ERR_WRONGSEC:
8897538e 163 case -NFS4ERR_WRONG_CRED:
7ebb9315 164 return -EPERM;
3ddeb7c5
TM		 165 case -NFS4ERR_BADOWNER:
166 case -NFS4ERR_BADNAME:
167 return -EINVAL;
fb13bfa7
TM		 168 case -NFS4ERR_SHARE_DENIED:
169 return -EACCES;
f25efd85
SD		 170 case -NFS4ERR_MINOR_VERS_MISMATCH:
171 return -EPROTONOSUPPORT;
6e3cf241
TM		 172 case -NFS4ERR_FILE_OPEN:
173 return -EBUSY;
52567b03 174 default:
1da177e4 175 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 176 __func__, -err);
52567b03 177 break;
1da177e4 178 }
52567b03 179 return -EIO;
1da177e4
LT		 180}
181
182/*
183 * This is our standard bitmap for GETATTR requests.
184 */
1549210f 185const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 186 FATTR4_WORD0_TYPE
187 | FATTR4_WORD0_CHANGE
188 | FATTR4_WORD0_SIZE
189 | FATTR4_WORD0_FSID
190 | FATTR4_WORD0_FILEID,
191 FATTR4_WORD1_MODE
192 | FATTR4_WORD1_NUMLINKS
193 | FATTR4_WORD1_OWNER
194 | FATTR4_WORD1_OWNER_GROUP
195 | FATTR4_WORD1_RAWDEV
196 | FATTR4_WORD1_SPACE_USED
197 | FATTR4_WORD1_TIME_ACCESS
198 | FATTR4_WORD1_TIME_METADATA
ea96d1ec
AS		 199 | FATTR4_WORD1_TIME_MODIFY
200 | FATTR4_WORD1_MOUNTED_ON_FILEID,
aa9c2669
DQ		 201#ifdef CONFIG_NFS_V4_SECURITY_LABEL
202 FATTR4_WORD2_SECURITY_LABEL
203#endif
1da177e4
LT		 204};
205
1549210f
TM		 206static const u32 nfs4_pnfs_open_bitmap[3] = {
207 FATTR4_WORD0_TYPE
208 | FATTR4_WORD0_CHANGE
209 | FATTR4_WORD0_SIZE
210 | FATTR4_WORD0_FSID
211 | FATTR4_WORD0_FILEID,
212 FATTR4_WORD1_MODE
213 | FATTR4_WORD1_NUMLINKS
214 | FATTR4_WORD1_OWNER
215 | FATTR4_WORD1_OWNER_GROUP
216 | FATTR4_WORD1_RAWDEV
217 | FATTR4_WORD1_SPACE_USED
218 | FATTR4_WORD1_TIME_ACCESS
219 | FATTR4_WORD1_TIME_METADATA
220 | FATTR4_WORD1_TIME_MODIFY,
221 FATTR4_WORD2_MDSTHRESHOLD
95864c91
TM		 222#ifdef CONFIG_NFS_V4_SECURITY_LABEL
223 | FATTR4_WORD2_SECURITY_LABEL
224#endif
1549210f
TM		 225};
226
e23008ec
AA		 227static const u32 nfs4_open_noattr_bitmap[3] = {
228 FATTR4_WORD0_TYPE
e23008ec
AA		 229 | FATTR4_WORD0_FILEID,
230};
231
a09df2ca 232const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 233 FATTR4_WORD0_FILES_AVAIL
234 | FATTR4_WORD0_FILES_FREE
235 | FATTR4_WORD0_FILES_TOTAL,
236 FATTR4_WORD1_SPACE_AVAIL
237 | FATTR4_WORD1_SPACE_FREE
238 | FATTR4_WORD1_SPACE_TOTAL
239};
240
a09df2ca 241const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 242 FATTR4_WORD0_MAXLINK
243 | FATTR4_WORD0_MAXNAME,
244 0
245};
246
dae100c2 247const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 248 | FATTR4_WORD0_MAXREAD
249 | FATTR4_WORD0_MAXWRITE
250 | FATTR4_WORD0_LEASE_TIME,
55b6e774 251 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 252 | FATTR4_WORD1_FS_LAYOUT_TYPES,
253 FATTR4_WORD2_LAYOUT_BLKSIZE
2a92ee92 254 | FATTR4_WORD2_CLONE_BLKSIZE
1da177e4
LT		 255};
256
a09df2ca 257const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 258 FATTR4_WORD0_TYPE
259 | FATTR4_WORD0_CHANGE
260 | FATTR4_WORD0_SIZE
261 | FATTR4_WORD0_FSID
262 | FATTR4_WORD0_FILEID
263 | FATTR4_WORD0_FS_LOCATIONS,
264 FATTR4_WORD1_MODE
265 | FATTR4_WORD1_NUMLINKS
266 | FATTR4_WORD1_OWNER
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{
0dbb4c67 279 __be32 *start, *p;
1da177e4 280
1da177e4 281 if (cookie > 2) {
b7ef1956 282 readdir->cookie = cookie;
1da177e4
LT		 283 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
284 return;
285 }
286
287 readdir->cookie = 0;
288 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
289 if (cookie == 2)
290 return;
291
292 /*
293 * NFSv4 servers do not return entries for '.' and '..'
294 * Therefore, we fake these entries here. We let '.'
295 * have cookie 0 and '..' have cookie 1. Note that
296 * when talking to the server, we always send cookie 0
297 * instead of 1 or 2.
298 */
2b86ce2d 299 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 300
301 if (cookie == 0) {
302 *p++ = xdr_one; /* next */
303 *p++ = xdr_zero; /* cookie, first word */
304 *p++ = xdr_one; /* cookie, second word */
305 *p++ = xdr_one; /* entry len */
306 memcpy(p, ".\0\0\0", 4); /* entry */
307 p++;
308 *p++ = xdr_one; /* bitmap length */
309 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
310 *p++ = htonl(8); /* attribute buffer length */
2b0143b5 311 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
1da177e4
LT		 312 }
313
314 *p++ = xdr_one; /* next */
315 *p++ = xdr_zero; /* cookie, first word */
316 *p++ = xdr_two; /* cookie, second word */
317 *p++ = xdr_two; /* entry len */
318 memcpy(p, "..\0\0", 4); /* entry */
319 p++;
320 *p++ = xdr_one; /* bitmap length */
321 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
322 *p++ = htonl(8); /* attribute buffer length */
2b0143b5 323 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
1da177e4
LT		 324
325 readdir->pgbase = (char *)p - (char *)start;
326 readdir->count -= readdir->pgbase;
2b86ce2d 327 kunmap_atomic(start);
1da177e4
LT		 328}
329
26d36301
TM		 330static void nfs4_test_and_free_stateid(struct nfs_server *server,
331 nfs4_stateid *stateid,
332 struct rpc_cred *cred)
333{
334 const struct nfs4_minor_version_ops *ops = server->nfs_client->cl_mvops;
335
336 ops->test_and_free_expired(server, stateid, cred);
337}
338
339static void __nfs4_free_revoked_stateid(struct nfs_server *server,
340 nfs4_stateid *stateid,
341 struct rpc_cred *cred)
342{
343 stateid->type = NFS4_REVOKED_STATEID_TYPE;
344 nfs4_test_and_free_stateid(server, stateid, cred);
345}
346
347static void nfs4_free_revoked_stateid(struct nfs_server *server,
348 const nfs4_stateid *stateid,
349 struct rpc_cred *cred)
350{
351 nfs4_stateid tmp;
352
353 nfs4_stateid_copy(&tmp, stateid);
354 __nfs4_free_revoked_stateid(server, &tmp, cred);
355}
356
8478eaa1
N		 357static long nfs4_update_delay(long *timeout)
358{
359 long ret;
360 if (!timeout)
361 return NFS4_POLL_RETRY_MAX;
362 if (*timeout <= 0)
363 *timeout = NFS4_POLL_RETRY_MIN;
364 if (*timeout > NFS4_POLL_RETRY_MAX)
365 *timeout = NFS4_POLL_RETRY_MAX;
366 ret = *timeout;
367 *timeout <<= 1;
368 return ret;
369}
370
65de872e
TM		 371static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
372{
373 int res = 0;
374
375 might_sleep();
376
8478eaa1
N		 377 freezable_schedule_timeout_killable_unsafe(
378 nfs4_update_delay(timeout));
65de872e
TM		 379 if (fatal_signal_pending(current))
380 res = -ERESTARTSYS;
65de872e
TM		 381 return res;
382}
383
384/* This is the error handling routine for processes that are allowed
385 * to sleep.
386 */
b3c2aa07
TM		 387static int nfs4_do_handle_exception(struct nfs_server *server,
388 int errorcode, struct nfs4_exception *exception)
65de872e
TM		 389{
390 struct nfs_client *clp = server->nfs_client;
9e33bed5 391 struct nfs4_state *state = exception->state;
8487c479 392 const nfs4_stateid *stateid = exception->stateid;
3114ea7a 393 struct inode *inode = exception->inode;
65de872e
TM		 394 int ret = errorcode;
395
b3c2aa07
TM		 396 exception->delay = 0;
397 exception->recovering = 0;
65de872e 398 exception->retry = 0;
272289a3
TM		 399
400 if (stateid == NULL && state != NULL)
401 stateid = &state->stateid;
402
65de872e
TM		 403 switch(errorcode) {
404 case 0:
405 return 0;
5ba12443
TM		 406 case -NFS4ERR_DELEG_REVOKED:
407 case -NFS4ERR_ADMIN_REVOKED:
272289a3 408 case -NFS4ERR_EXPIRED:
5ba12443 409 case -NFS4ERR_BAD_STATEID:
272289a3
TM		 410 if (inode != NULL && stateid != NULL) {
411 nfs_inode_find_state_and_recover(inode,
412 stateid);
413 goto wait_on_recovery;
414 }
415 case -NFS4ERR_OPENMODE:
8487c479
TM		 416 if (inode) {
417 int err;
418
419 err = nfs_async_inode_return_delegation(inode,
420 stateid);
421 if (err == 0)
422 goto wait_on_recovery;
423 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) {
424 exception->retry = 1;
425 break;
426 }
427 }
3114ea7a
TM		 428 if (state == NULL)
429 break;
5d422301
TM		 430 ret = nfs4_schedule_stateid_recovery(server, state);
431 if (ret < 0)
432 break;
3114ea7a 433 goto wait_on_recovery;
65de872e 434 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 435 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 436 nfs4_schedule_lease_recovery(clp);
437 goto wait_on_recovery;
519ae255
CL		 438 case -NFS4ERR_MOVED:
439 ret = nfs4_schedule_migration_recovery(server);
440 if (ret < 0)
441 break;
442 goto wait_on_recovery;
8ef2f8d4
CL		 443 case -NFS4ERR_LEASE_MOVED:
444 nfs4_schedule_lease_moved_recovery(clp);
445 goto wait_on_recovery;
03391693 446#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 447 case -NFS4ERR_BADSESSION:
448 case -NFS4ERR_BADSLOT:
449 case -NFS4ERR_BAD_HIGH_SLOT:
450 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
451 case -NFS4ERR_DEADSESSION:
452 case -NFS4ERR_SEQ_FALSE_RETRY:
453 case -NFS4ERR_SEQ_MISORDERED:
454 dprintk("%s ERROR: %d Reset session\n", __func__,
455 errorcode);
9f594791 456 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 457 goto wait_on_recovery;
03391693 458#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 459 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 460 if (exception->timeout > HZ) {
461 /* We have retried a decent amount, time to
462 * fail
463 */
464 ret = -EBUSY;
465 break;
466 }
65de872e 467 case -NFS4ERR_DELAY:
2598ed34
TM		 468 nfs_inc_server_stats(server, NFSIOS_DELAY);
469 case -NFS4ERR_GRACE:
e85d7ee4 470 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b 471 case -NFS4ERR_RECALLCONFLICT:
b3c2aa07
TM		 472 exception->delay = 1;
473 return 0;
474
a8a4ae3a 475 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 476 case -NFS4ERR_OLD_STATEID:
477 exception->retry = 1;
b064eca2
TM		 478 break;
479 case -NFS4ERR_BADOWNER:
480 /* The following works around a Linux server bug! */
481 case -NFS4ERR_BADNAME:
482 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
483 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
484 exception->retry = 1;
485 printk(KERN_WARNING "NFS: v4 server %s "
486 "does not accept raw "
487 "uid/gids. "
488 "Reenabling the idmapper.\n",
489 server->nfs_client->cl_hostname);
490 }
65de872e
TM		 491 }
492 /* We failed to handle the error */
493 return nfs4_map_errors(ret);
0400a6b0 494wait_on_recovery:
b3c2aa07
TM		 495 exception->recovering = 1;
496 return 0;
497}
498
499/* This is the error handling routine for processes that are allowed
500 * to sleep.
501 */
502int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
503{
504 struct nfs_client *clp = server->nfs_client;
505 int ret;
506
507 ret = nfs4_do_handle_exception(server, errorcode, exception);
508 if (exception->delay) {
509 ret = nfs4_delay(server->client, &exception->timeout);
510 goto out_retry;
511 }
512 if (exception->recovering) {
513 ret = nfs4_wait_clnt_recover(clp);
514 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
515 return -EIO;
516 goto out_retry;
517 }
518 return ret;
519out_retry:
a2c0b9e2
TM		 520 if (ret == 0)
521 exception->retry = 1;
522 return ret;
65de872e
TM		 523}
524
037fc980
TM		 525static int
526nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
527 int errorcode, struct nfs4_exception *exception)
528{
529 struct nfs_client *clp = server->nfs_client;
530 int ret;
531
532 ret = nfs4_do_handle_exception(server, errorcode, exception);
533 if (exception->delay) {
534 rpc_delay(task, nfs4_update_delay(&exception->timeout));
535 goto out_retry;
536 }
537 if (exception->recovering) {
538 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
539 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
540 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
541 goto out_retry;
542 }
519ae255 543 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
037fc980
TM		 544 ret = -EIO;
545 return ret;
546out_retry:
a2c0b9e2
TM		 547 if (ret == 0)
548 exception->retry = 1;
549 return ret;
65de872e
TM		 550}
551
037fc980
TM		 552static int
553nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
554 struct nfs4_state *state, long *timeout)
555{
556 struct nfs4_exception exception = {
557 .state = state,
558 };
559
560 if (task->tk_status >= 0)
561 return 0;
562 if (timeout)
563 exception.timeout = *timeout;
564 task->tk_status = nfs4_async_handle_exception(task, server,
565 task->tk_status,
566 &exception);
567 if (exception.delay && timeout)
568 *timeout = exception.timeout;
569 if (exception.retry)
570 return -EAGAIN;
571 return 0;
572}
573
a5250def
WAA		 574/*
575 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
576 * or 'false' otherwise.
577 */
578static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
579{
580 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
581
582 if (flavor == RPC_AUTH_GSS_KRB5I ||
583 flavor == RPC_AUTH_GSS_KRB5P)
584 return true;
585
586 return false;
587}
65de872e 588
452e9352 589static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 590{
1da177e4
LT		 591 spin_lock(&clp->cl_lock);
592 if (time_before(clp->cl_last_renewal,timestamp))
593 clp->cl_last_renewal = timestamp;
594 spin_unlock(&clp->cl_lock);
595}
596
452e9352
TM		 597static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
598{
be824167
TM		 599 struct nfs_client *clp = server->nfs_client;
600
601 if (!nfs4_has_session(clp))
602 do_renew_lease(clp, timestamp);
452e9352
TM		 603}
604
2a3eb2b9
CL		 605struct nfs4_call_sync_data {
606 const struct nfs_server *seq_server;
607 struct nfs4_sequence_args *seq_args;
608 struct nfs4_sequence_res *seq_res;
609};
610
be3a5d23
TM		 611void nfs4_init_sequence(struct nfs4_sequence_args *args,
612 struct nfs4_sequence_res *res, int cache_reply)
a9c92d6b
CL		 613{
614 args->sa_slot = NULL;
615 args->sa_cache_this = cache_reply;
616 args->sa_privileged = 0;
617
618 res->sr_slot = NULL;
619}
620
621static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
622{
623 args->sa_privileged = 1;
624}
625
cb04ad2a
PT		 626int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
627 struct nfs4_sequence_args *args,
628 struct nfs4_sequence_res *res,
629 struct rpc_task *task)
3bd2384a 630{
3bd2384a
CL		 631 struct nfs4_slot *slot;
632
633 /* slot already allocated? */
634 if (res->sr_slot != NULL)
635 goto out_start;
636
637 spin_lock(&tbl->slot_tbl_lock);
638 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
639 goto out_sleep;
640
641 slot = nfs4_alloc_slot(tbl);
642 if (IS_ERR(slot)) {
643 if (slot == ERR_PTR(-ENOMEM))
644 task->tk_timeout = HZ >> 2;
645 goto out_sleep;
646 }
647 spin_unlock(&tbl->slot_tbl_lock);
648
0a014a44 649 slot->privileged = args->sa_privileged ? 1 : 0;
3bd2384a
CL		 650 args->sa_slot = slot;
651 res->sr_slot = slot;
652
653out_start:
654 rpc_call_start(task);
655 return 0;
656
657out_sleep:
658 if (args->sa_privileged)
659 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
660 NULL, RPC_PRIORITY_PRIVILEGED);
661 else
662 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
663 spin_unlock(&tbl->slot_tbl_lock);
664 return -EAGAIN;
665}
cb04ad2a 666EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
3bd2384a 667
2e80dbe7 668static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res)
3bd2384a
CL		 669{
670 struct nfs4_slot *slot = res->sr_slot;
671 struct nfs4_slot_table *tbl;
672
3bd2384a
CL		 673 tbl = slot->table;
674 spin_lock(&tbl->slot_tbl_lock);
675 if (!nfs41_wake_and_assign_slot(tbl, slot))
676 nfs4_free_slot(tbl, slot);
677 spin_unlock(&tbl->slot_tbl_lock);
678
679 res->sr_slot = NULL;
2e80dbe7
TM		 680}
681
682static int nfs40_sequence_done(struct rpc_task *task,
683 struct nfs4_sequence_res *res)
684{
685 if (res->sr_slot != NULL)
686 nfs40_sequence_free_slot(res);
3bd2384a
CL		 687 return 1;
688}
689
cccef3b9
AA		 690#if defined(CONFIG_NFS_V4_1)
691
d185a334 692static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 693{
e3725ec0 694 struct nfs4_session *session;
13615871 695 struct nfs4_slot_table *tbl;
a13ce7c6 696 struct nfs4_slot *slot = res->sr_slot;
c10e4498 697 bool send_new_highest_used_slotid = false;
13615871 698
a13ce7c6 699 tbl = slot->table;
e3725ec0 700 session = tbl->session;
ea028ac9 701
07e8dcbd
TM		 702 /* Bump the slot sequence number */
703 if (slot->seq_done)
704 slot->seq_nr++;
705 slot->seq_done = 0;
706
35dc1d74 707 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 708 /* Be nice to the server: try to ensure that the last transmitted
709 * value for highest_user_slotid <= target_highest_slotid
710 */
711 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
712 send_new_highest_used_slotid = true;
713
a13ce7c6 714 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 715 send_new_highest_used_slotid = false;
716 goto out_unlock;
717 }
a13ce7c6 718 nfs4_free_slot(tbl, slot);
c10e4498
TM		 719
720 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
721 send_new_highest_used_slotid = false;
b75ad4cd 722out_unlock:
35dc1d74 723 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 724 res->sr_slot = NULL;
c10e4498 725 if (send_new_highest_used_slotid)
3f10a6af 726 nfs41_notify_server(session->clp);
045d2a6d
TM		 727 if (waitqueue_active(&tbl->slot_waitq))
728 wake_up_all(&tbl->slot_waitq);
13615871
AA		 729}
730
2e80dbe7
TM		 731static int nfs41_sequence_process(struct rpc_task *task,
732 struct nfs4_sequence_res *res)
b0df806c 733{
e3725ec0 734 struct nfs4_session *session;
a13ce7c6 735 struct nfs4_slot *slot = res->sr_slot;
14516c3a 736 struct nfs_client *clp;
ac20d163 737 bool interrupted = false;
85563073 738 int ret = 1;
b0df806c 739
a13ce7c6
TM		 740 if (slot == NULL)
741 goto out_noaction;
468f8613
BS		 742 /* don't increment the sequence number if the task wasn't sent */
743 if (!RPC_WAS_SENT(task))
b0df806c
AA		 744 goto out;
745
e3725ec0 746 session = slot->table->session;
933602e3 747
ac20d163
TM		 748 if (slot->interrupted) {
749 slot->interrupted = 0;
750 interrupted = true;
751 }
752
2f92ae34 753 trace_nfs4_sequence_done(session, res);
691daf3b 754 /* Check the SEQUENCE operation status */
14516c3a
TM		 755 switch (res->sr_status) {
756 case 0:
a865880e
OK		 757 /* If previous op on slot was interrupted and we reused
758 * the seq# and got a reply from the cache, then retry
759 */
760 if (task->tk_status == -EREMOTEIO && interrupted) {
761 ++slot->seq_nr;
762 goto retry_nowait;
763 }
b0df806c 764 /* Update the slot's sequence and clientid lease timer */
07e8dcbd 765 slot->seq_done = 1;
e3725ec0 766 clp = session->clp;
8e63b6a8 767 do_renew_lease(clp, res->sr_timestamp);
0629e370 768 /* Check sequence flags */
0a014a44
TM		 769 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags,
770 !!slot->privileged);
464ee9f9 771 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 772 break;
ac20d163
TM		 773 case 1:
774 /*
775 * sr_status remains 1 if an RPC level error occurred.
776 * The server may or may not have processed the sequence
777 * operation..
778 * Mark the slot as having hosted an interrupted RPC call.
779 */
780 slot->interrupted = 1;
781 goto out;
14516c3a
TM		 782 case -NFS4ERR_DELAY:
783 /* The server detected a resend of the RPC call and
784 * returned NFS4ERR_DELAY as per Section 2.10.6.2
785 * of RFC5661.
786 */
df2fabff 787 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 788 __func__,
df2fabff 789 slot->slot_nr,
933602e3 790 slot->seq_nr);
14516c3a 791 goto out_retry;
85563073
TM		 792 case -NFS4ERR_BADSLOT:
793 /*
794 * The slot id we used was probably retired. Try again
795 * using a different slot id.
796 */
e8794440
TM		 797 goto retry_nowait;
798 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 799 /*
800 * Was the last operation on this sequence interrupted?
801 * If so, retry after bumping the sequence number.
802 */
803 if (interrupted) {
804 ++slot->seq_nr;
805 goto retry_nowait;
806 }
e8794440
TM		 807 /*
808 * Could this slot have been previously retired?
809 * If so, then the server may be expecting seq_nr = 1!
810 */
8e63b6a8
TM		 811 if (slot->seq_nr != 1) {
812 slot->seq_nr = 1;
813 goto retry_nowait;
814 }
815 break;
e8794440
TM		 816 case -NFS4ERR_SEQ_FALSE_RETRY:
817 ++slot->seq_nr;
818 goto retry_nowait;
14516c3a
TM		 819 default:
820 /* Just update the slot sequence no. */
07e8dcbd 821 slot->seq_done = 1;
b0df806c
AA		 822 }
823out:
824 /* The session may be reset by one of the error handlers. */
825 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
a13ce7c6 826out_noaction:
85563073 827 return ret;
e8794440
TM		 828retry_nowait:
829 if (rpc_restart_call_prepare(task)) {
2e80dbe7 830 nfs41_sequence_free_slot(res);
e8794440
TM		 831 task->tk_status = 0;
832 ret = 0;
833 }
834 goto out;
14516c3a 835out_retry:
d05dd4e9 836 if (!rpc_restart_call(task))
14516c3a
TM		 837 goto out;
838 rpc_delay(task, NFS4_POLL_RETRY_MAX);
839 return 0;
b0df806c 840}
2e80dbe7
TM		 841
842int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
843{
844 if (!nfs41_sequence_process(task, res))
845 return 0;
846 if (res->sr_slot != NULL)
847 nfs41_sequence_free_slot(res);
848 return 1;
849
850}
f9c96fcc 851EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 852
2e80dbe7
TM		 853static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
854{
855 if (res->sr_slot == NULL)
856 return 1;
857 if (res->sr_slot->table->session != NULL)
858 return nfs41_sequence_process(task, res);
859 return nfs40_sequence_done(task, res);
860}
861
862static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
863{
864 if (res->sr_slot != NULL) {
865 if (res->sr_slot->table->session != NULL)
866 nfs41_sequence_free_slot(res);
867 else
868 nfs40_sequence_free_slot(res);
869 }
870}
871
2c4b131d 872int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 873{
e3725ec0 874 if (res->sr_slot == NULL)
14516c3a 875 return 1;
3bd2384a
CL		 876 if (!res->sr_slot->table->session)
877 return nfs40_sequence_done(task, res);
14516c3a 878 return nfs41_sequence_done(task, res);
df896455 879}
2c4b131d 880EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 881
dc70d7b3 882int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 883 struct nfs4_sequence_args *args,
884 struct nfs4_sequence_res *res,
ce5039c1
AA		 885 struct rpc_task *task)
886{
fbcd4abc
AA		 887 struct nfs4_slot *slot;
888 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 889
890 dprintk("--> %s\n", __func__);
ce5039c1 891 /* slot already allocated? */
dfb4f309 892 if (res->sr_slot != NULL)
d9afbd1b 893 goto out_success;
ce5039c1 894
fbcd4abc
AA		 895 tbl = &session->fc_slot_table;
896
69d206b5
TM		 897 task->tk_timeout = 0;
898
fbcd4abc 899 spin_lock(&tbl->slot_tbl_lock);
774d5f14 900 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 901 !args->sa_privileged) {
0b1c8fc4 902 /* The state manager will wait until the slot table is empty */
0b1c8fc4 903 dprintk("%s session is draining\n", __func__);
7b939a3f 904 goto out_sleep;
689cf5c1
AB		 905 }
906
2dc03b7f 907 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 908 if (IS_ERR(slot)) {
909 /* If out of memory, try again in 1/4 second */
910 if (slot == ERR_PTR(-ENOMEM))
911 task->tk_timeout = HZ >> 2;
fbcd4abc 912 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 913 goto out_sleep;
fbcd4abc
AA		 914 }
915 spin_unlock(&tbl->slot_tbl_lock);
916
0a014a44 917 slot->privileged = args->sa_privileged ? 1 : 0;
2b2fa717 918 args->sa_slot = slot;
fbcd4abc 919
e8d92382 920 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 921 slot->slot_nr, slot->seq_nr);
fbcd4abc 922
dfb4f309 923 res->sr_slot = slot;
8e63b6a8 924 res->sr_timestamp = jiffies;
2a6e26cd 925 res->sr_status_flags = 0;
fbcd4abc
AA		 926 /*
927 * sr_status is only set in decode_sequence, and so will remain
928 * set to 1 if an rpc level failure occurs.
929 */
930 res->sr_status = 1;
2f92ae34 931 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 932out_success:
933 rpc_call_start(task);
ce5039c1 934 return 0;
7b939a3f 935out_sleep:
8fe72bac
TM		 936 /* Privileged tasks are queued with top priority */
937 if (args->sa_privileged)
1e1093c7
TM		 938 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
939 NULL, RPC_PRIORITY_PRIVILEGED);
940 else
941 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 942 spin_unlock(&tbl->slot_tbl_lock);
943 return -EAGAIN;
ce5039c1 944}
dc70d7b3 945EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 946
5a580e0a
CL		 947static int nfs4_setup_sequence(const struct nfs_server *server,
948 struct nfs4_sequence_args *args,
949 struct nfs4_sequence_res *res,
950 struct rpc_task *task)
ce5039c1 951{
035168ab 952 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 953 int ret = 0;
954
3bd2384a 955 if (!session)
cb04ad2a
PT		 956 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
957 args, res, task);
035168ab 958
e8d92382 959 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 960 __func__, session->clp, session, res->sr_slot ?
e8d92382 961 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 962
9d12b216 963 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 964
ce5039c1
AA		 965 dprintk("<-- %s status=%d\n", __func__, ret);
966 return ret;
967}
968
ce5039c1
AA		 969static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
970{
2a3eb2b9 971 struct nfs4_call_sync_data *data = calldata;
6ba7db34 972 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 973
035168ab
TM		 974 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
975
d9afbd1b 976 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 977}
978
69ab40c4
AA		 979static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
980{
2a3eb2b9 981 struct nfs4_call_sync_data *data = calldata;
69ab40c4 982
14516c3a 983 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 984}
985
17280175 986static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 987 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 988 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 989};
990
3bd2384a
CL		 991#else /* !CONFIG_NFS_V4_1 */
992
9915ea7e
CL		 993static int nfs4_setup_sequence(const struct nfs_server *server,
994 struct nfs4_sequence_args *args,
995 struct nfs4_sequence_res *res,
996 struct rpc_task *task)
997{
cb04ad2a
PT		 998 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
999 args, res, task);
9915ea7e
CL		 1000}
1001
2e80dbe7
TM		 1002static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
1003{
1004 return nfs40_sequence_done(task, res);
1005}
1006
1007static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
1008{
1009 if (res->sr_slot != NULL)
1010 nfs40_sequence_free_slot(res);
1011}
1012
2c4b131d
PT		 1013int nfs4_sequence_done(struct rpc_task *task,
1014 struct nfs4_sequence_res *res)
9915ea7e 1015{
3bd2384a 1016 return nfs40_sequence_done(task, res);
9915ea7e 1017}
2c4b131d 1018EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 1019
1020#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 1021
1022static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
1023{
1024 struct nfs4_call_sync_data *data = calldata;
1025 nfs4_setup_sequence(data->seq_server,
1026 data->seq_args, data->seq_res, task);
1027}
1028
1029static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
1030{
1031 struct nfs4_call_sync_data *data = calldata;
1032 nfs4_sequence_done(task, data->seq_res);
1033}
1034
1035static const struct rpc_call_ops nfs40_call_sync_ops = {
1036 .rpc_call_prepare = nfs40_call_sync_prepare,
1037 .rpc_call_done = nfs40_call_sync_done,
1038};
1039
7c513058
BS		 1040static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
1041 struct nfs_server *server,
ce5039c1
AA		 1042 struct rpc_message *msg,
1043 struct nfs4_sequence_args *args,
8fe72bac 1044 struct nfs4_sequence_res *res)
ce5039c1
AA		 1045{
1046 int ret;
1047 struct rpc_task *task;
9915ea7e 1048 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 1049 struct nfs4_call_sync_data data = {
035168ab 1050 .seq_server = server,
ce5039c1
AA		 1051 .seq_args = args,
1052 .seq_res = res,
ce5039c1
AA		 1053 };
1054 struct rpc_task_setup task_setup = {
7c513058 1055 .rpc_client = clnt,
ce5039c1 1056 .rpc_message = msg,
9915ea7e 1057 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 1058 .callback_data = &data
1059 };
1060
ce5039c1
AA		 1061 task = rpc_run_task(&task_setup);
1062 if (IS_ERR(task))
1063 ret = PTR_ERR(task);
1064 else {
1065 ret = task->tk_status;
1066 rpc_put_task(task);
1067 }
1068 return ret;
1069}
1070
7c513058
BS		 1071int nfs4_call_sync(struct rpc_clnt *clnt,
1072 struct nfs_server *server,
e73b83f2
BS		 1073 struct rpc_message *msg,
1074 struct nfs4_sequence_args *args,
1075 struct nfs4_sequence_res *res,
1076 int cache_reply)
1077{
a9c92d6b 1078 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 1079 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 1080}
cccef3b9 1081
38478b24 1082static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 1083{
38478b24 1084 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 1085
38478b24 1086 spin_lock(&dir->i_lock);
359d7d1c 1087 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 1088 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 1089 nfs_force_lookup_revalidate(dir);
a9a4a87a 1090 dir->i_version = cinfo->after;
3235b403 1091 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
de242c0b 1092 nfs_fscache_invalidate(dir);
38478b24 1093 spin_unlock(&dir->i_lock);
1da177e4
LT		 1094}
1095
e56e0b78 1096struct nfs4_opendata {
c6d00e63 1097 struct kref kref;
e56e0b78
TM		 1098 struct nfs_openargs o_arg;
1099 struct nfs_openres o_res;
cdd4e68b
TM		 1100 struct nfs_open_confirmargs c_arg;
1101 struct nfs_open_confirmres c_res;
6926afd1
TM		 1102 struct nfs4_string owner_name;
1103 struct nfs4_string group_name;
a49c2691 1104 struct nfs4_label *a_label;
e56e0b78 1105 struct nfs_fattr f_attr;
1775fd3e 1106 struct nfs4_label *f_label;
e56e0b78 1107 struct dentry *dir;
82a2c1b7 1108 struct dentry *dentry;
e56e0b78 1109 struct nfs4_state_owner *owner;
aac00a8d 1110 struct nfs4_state *state;
e56e0b78 1111 struct iattr attrs;
26e976a8 1112 unsigned long timestamp;
3e309914 1113 unsigned int rpc_done : 1;
5bc2afc2 1114 unsigned int file_created : 1;
bdeca1b7 1115 unsigned int is_recover : 1;
24ac23ab
TM		 1116 int rpc_status;
1117 int cancelled;
e56e0b78
TM		 1118};
1119
49f9a0fa
TM		 1120static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1121 int err, struct nfs4_exception *exception)
1122{
1123 if (err != -EINVAL)
1124 return false;
1125 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1126 return false;
1127 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1128 exception->retry = 1;
1129 return true;
1130}
1131
6ae37339
TM		 1132static u32
1133nfs4_map_atomic_open_share(struct nfs_server *server,
1134 fmode_t fmode, int openflags)
1135{
1136 u32 res = 0;
1137
1138 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1139 case FMODE_READ:
1140 res = NFS4_SHARE_ACCESS_READ;
1141 break;
1142 case FMODE_WRITE:
1143 res = NFS4_SHARE_ACCESS_WRITE;
1144 break;
1145 case FMODE_READ|FMODE_WRITE:
1146 res = NFS4_SHARE_ACCESS_BOTH;
1147 }
1148 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1149 goto out;
1150 /* Want no delegation if we're using O_DIRECT */
1151 if (openflags & O_DIRECT)
1152 res |= NFS4_SHARE_WANT_NO_DELEG;
1153out:
1154 return res;
1155}
1156
49f9a0fa
TM		 1157static enum open_claim_type4
1158nfs4_map_atomic_open_claim(struct nfs_server *server,
1159 enum open_claim_type4 claim)
1160{
1161 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1162 return claim;
1163 switch (claim) {
1164 default:
1165 return claim;
1166 case NFS4_OPEN_CLAIM_FH:
1167 return NFS4_OPEN_CLAIM_NULL;
1168 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1169 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1170 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1171 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1172 }
1173}
2ced46c2
TM		 1174
1175static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1176{
1177 p->o_res.f_attr = &p->f_attr;
1775fd3e 1178 p->o_res.f_label = p->f_label;
c1d51931
TM		 1179 p->o_res.seqid = p->o_arg.seqid;
1180 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 1181 p->o_res.server = p->o_arg.server;
5f657530 1182 p->o_res.access_request = p->o_arg.access;
2ced46c2 1183 nfs_fattr_init(&p->f_attr);
6926afd1 1184 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 1185}
1186
82a2c1b7 1187static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 1188 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 1189 const struct iattr *attrs,
1775fd3e 1190 struct nfs4_label *label,
4a1c0893 1191 enum open_claim_type4 claim,
8535b2be 1192 gfp_t gfp_mask)
e56e0b78 1193{
82a2c1b7 1194 struct dentry *parent = dget_parent(dentry);
2b0143b5 1195 struct inode *dir = d_inode(parent);
e56e0b78 1196 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1197 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 1198 struct nfs4_opendata *p;
1199
8535b2be 1200 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1201 if (p == NULL)
1202 goto err;
14c43f76
DQ		 1203
1204 p->f_label = nfs4_label_alloc(server, gfp_mask);
1205 if (IS_ERR(p->f_label))
1206 goto err_free_p;
1207
a49c2691
KM		 1208 p->a_label = nfs4_label_alloc(server, gfp_mask);
1209 if (IS_ERR(p->a_label))
1210 goto err_free_f;
1211
63f5f796
TM		 1212 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1213 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1214 if (IS_ERR(p->o_arg.seqid))
14c43f76 1215 goto err_free_label;
82a2c1b7
AV		 1216 nfs_sb_active(dentry->d_sb);
1217 p->dentry = dget(dentry);
e56e0b78
TM		 1218 p->dir = parent;
1219 p->owner = sp;
1220 atomic_inc(&sp->so_count);
dc0b027d
TM		 1221 p->o_arg.open_flags = flags;
1222 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
536585cc 1223 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
6ae37339
TM		 1224 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1225 fmode, flags);
ae2bb032
WAA		 1226 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1227 * will return permission denied for all bits until close */
1228 if (!(flags & O_EXCL)) {
1229 /* ask server to check for all possible rights as results
1230 * are cached */
536585cc
TM		 1231 switch (p->o_arg.claim) {
1232 default:
1233 break;
1234 case NFS4_OPEN_CLAIM_NULL:
1235 case NFS4_OPEN_CLAIM_FH:
1236 p->o_arg.access = NFS4_ACCESS_READ |
1237 NFS4_ACCESS_MODIFY |
1238 NFS4_ACCESS_EXTEND |
1239 NFS4_ACCESS_EXECUTE;
1240 }
ae2bb032 1241 }
7539bbab 1242 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1243 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1244 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1245 p->o_arg.name = &dentry->d_name;
e56e0b78 1246 p->o_arg.server = server;
aa9c2669 1247 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1248 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
a49c2691 1249 p->o_arg.label = nfs4_label_copy(p->a_label, label);
49f9a0fa 1250 switch (p->o_arg.claim) {
4a1c0893
TM		 1251 case NFS4_OPEN_CLAIM_NULL:
1252 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1253 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1254 p->o_arg.fh = NFS_FH(dir);
1255 break;
1256 case NFS4_OPEN_CLAIM_PREVIOUS:
1257 case NFS4_OPEN_CLAIM_FH:
1258 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1259 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1260 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1261 }
536e43d1 1262 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1263 __u32 verf[2];
d77d76ff 1264
e56e0b78
TM		 1265 p->o_arg.u.attrs = &p->attrs;
1266 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1267
1268 verf[0] = jiffies;
1269 verf[1] = current->pid;
1270 memcpy(p->o_arg.u.verifier.data, verf,
1271 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1272 }
cdd4e68b
TM		 1273 p->c_arg.fh = &p->o_res.fh;
1274 p->c_arg.stateid = &p->o_res.stateid;
1275 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1276 nfs4_init_opendata_res(p);
c6d00e63 1277 kref_init(&p->kref);
e56e0b78 1278 return p;
14c43f76
DQ		 1279
1280err_free_label:
a49c2691
KM		 1281 nfs4_label_free(p->a_label);
1282err_free_f:
14c43f76
DQ		 1283 nfs4_label_free(p->f_label);
1284err_free_p:
e56e0b78
TM		 1285 kfree(p);
1286err:
1287 dput(parent);
1288 return NULL;
1289}
1290
c6d00e63 1291static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1292{
c6d00e63
TM		 1293 struct nfs4_opendata *p = container_of(kref,
1294 struct nfs4_opendata, kref);
82a2c1b7 1295 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1296
1297 nfs_free_seqid(p->o_arg.seqid);
2e80dbe7 1298 nfs4_sequence_free_slot(&p->o_res.seq_res);
aac00a8d
TM		 1299 if (p->state != NULL)
1300 nfs4_put_open_state(p->state);
c6d00e63 1301 nfs4_put_state_owner(p->owner);
14c43f76 1302
a49c2691 1303 nfs4_label_free(p->a_label);
14c43f76
DQ		 1304 nfs4_label_free(p->f_label);
1305
c6d00e63 1306 dput(p->dir);
82a2c1b7
AV		 1307 dput(p->dentry);
1308 nfs_sb_deactive(sb);
6926afd1 1309 nfs_fattr_free_names(&p->f_attr);
e911b815 1310 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1311 kfree(p);
1312}
1313
1314static void nfs4_opendata_put(struct nfs4_opendata *p)
1315{
1316 if (p != NULL)
1317 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1318}
1319
06f814a3
TM		 1320static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1321{
06f814a3
TM		 1322 int ret;
1323
06f814a3 1324 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1325 return ret;
1326}
1327
24311f88
TM		 1328static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1329 fmode_t fmode)
1330{
1331 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1332 case FMODE_READ|FMODE_WRITE:
1333 return state->n_rdwr != 0;
1334 case FMODE_WRITE:
1335 return state->n_wronly != 0;
1336 case FMODE_READ:
1337 return state->n_rdonly != 0;
1338 }
1339 WARN_ON_ONCE(1);
1340 return false;
1341}
1342
dc0b027d 1343static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1344{
1345 int ret = 0;
dc0b027d 1346
536e43d1 1347 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1348 goto out;
1349 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1350 case FMODE_READ:
88069f77
TM		 1351 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1352 && state->n_rdonly != 0;
6ee41268
TM		 1353 break;
1354 case FMODE_WRITE:
88069f77
TM		 1355 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1356 && state->n_wronly != 0;
6ee41268
TM		 1357 break;
1358 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1359 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1360 && state->n_rdwr != 0;
6ee41268 1361 }
dc0b027d 1362out:
6ee41268
TM		 1363 return ret;
1364}
1365
2a606188
TM		 1366static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1367 enum open_claim_type4 claim)
aac00a8d 1368{
652f89f6
TM		 1369 if (delegation == NULL)
1370 return 0;
dc0b027d 1371 if ((delegation->type & fmode) != fmode)
aac00a8d 1372 return 0;
d25be546
TM		 1373 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1374 return 0;
2a606188
TM		 1375 switch (claim) {
1376 case NFS4_OPEN_CLAIM_NULL:
1377 case NFS4_OPEN_CLAIM_FH:
1378 break;
1379 case NFS4_OPEN_CLAIM_PREVIOUS:
1380 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1381 break;
1382 default:
1383 return 0;
1384 }
b7391f44 1385 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1386 return 1;
1387}
1388
dc0b027d 1389static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1390{
dc0b027d 1391 switch (fmode) {
e7616923
TM		 1392 case FMODE_WRITE:
1393 state->n_wronly++;
1394 break;
1395 case FMODE_READ:
1396 state->n_rdonly++;
1397 break;
1398 case FMODE_READ|FMODE_WRITE:
1399 state->n_rdwr++;
1400 }
dc0b027d 1401 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1402}
1403
8a64c4ef
TM		 1404#ifdef CONFIG_NFS_V4_1
1405static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state)
1406{
1407 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags))
1408 return true;
1409 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags))
1410 return true;
1411 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags))
1412 return true;
1413 return false;
1414}
1415#endif /* CONFIG_NFS_V4_1 */
1416
4f14c194
TM		 1417static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1418{
1419 struct nfs_client *clp = state->owner->so_server->nfs_client;
1420 bool need_recover = false;
1421
1422 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1423 need_recover = true;
1424 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1425 need_recover = true;
1426 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1427 need_recover = true;
1428 if (need_recover)
1429 nfs4_state_mark_reclaim_nograce(clp, state);
1430}
1431
e999e80e 1432static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1393d961 1433 const nfs4_stateid *stateid, nfs4_stateid *freeme)
e999e80e
TM		 1434{
1435 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1436 return true;
4f14c194 1437 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1393d961 1438 nfs4_stateid_copy(freeme, &state->open_stateid);
4f14c194 1439 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1440 return true;
4f14c194 1441 }
e999e80e
TM		 1442 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1443 return true;
1444 return false;
1445}
1446
f95549cf
TM		 1447static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1448{
3c38cbe2
TM		 1449 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1450 return;
f95549cf
TM		 1451 if (state->n_wronly)
1452 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1453 if (state->n_rdonly)
1454 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1455 if (state->n_rdwr)
1456 set_bit(NFS_O_RDWR_STATE, &state->flags);
3c38cbe2 1457 set_bit(NFS_OPEN_STATE, &state->flags);
f95549cf
TM		 1458}
1459
226056c5
TM		 1460static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1461 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1462{
226056c5
TM		 1463 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1464 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1465 case FMODE_WRITE:
1466 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1467 break;
1468 case FMODE_READ:
1469 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1470 break;
1471 case 0:
1472 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1473 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1474 clear_bit(NFS_OPEN_STATE, &state->flags);
1475 }
1476 if (stateid == NULL)
1477 return;
3e7dfb16
TM		 1478 /* Handle OPEN+OPEN_DOWNGRADE races */
1479 if (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1480 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
f95549cf 1481 nfs_resync_open_stateid_locked(state);
226056c5 1482 return;
f95549cf 1483 }
003707c7 1484 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1485 nfs4_stateid_copy(&state->stateid, stateid);
1486 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1487}
1488
4a1e2feb
TM		 1489static void nfs_clear_open_stateid(struct nfs4_state *state,
1490 nfs4_stateid *arg_stateid,
1491 nfs4_stateid *stateid, fmode_t fmode)
226056c5
TM		 1492{
1493 write_seqlock(&state->seqlock);
3e7dfb16
TM		 1494 /* Ignore, if the CLOSE argment doesn't match the current stateid */
1495 if (nfs4_state_match_open_stateid_other(state, arg_stateid))
1496 nfs_clear_open_stateid_locked(state, stateid, fmode);
226056c5 1497 write_sequnlock(&state->seqlock);
4f14c194
TM		 1498 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1499 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1500}
1501
1393d961
TM		 1502static void nfs_set_open_stateid_locked(struct nfs4_state *state,
1503 const nfs4_stateid *stateid, fmode_t fmode,
1504 nfs4_stateid *freeme)
003707c7 1505{
dc0b027d 1506 switch (fmode) {
003707c7
TM		 1507 case FMODE_READ:
1508 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1509 break;
1510 case FMODE_WRITE:
1511 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1512 break;
1513 case FMODE_READ|FMODE_WRITE:
1514 set_bit(NFS_O_RDWR_STATE, &state->flags);
1515 }
1393d961 1516 if (!nfs_need_update_open_stateid(state, stateid, freeme))
e999e80e
TM		 1517 return;
1518 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1519 nfs4_stateid_copy(&state->stateid, stateid);
1520 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1521}
1522
1393d961
TM		 1523static void __update_open_stateid(struct nfs4_state *state,
1524 const nfs4_stateid *open_stateid,
1525 const nfs4_stateid *deleg_stateid,
1526 fmode_t fmode,
1527 nfs4_stateid *freeme)
1da177e4 1528{
8bda4e4c
TM		 1529 /*
1530 * Protect the call to nfs4_state_set_mode_locked and
1531 * serialise the stateid update
1532 */
361cad3c 1533 spin_lock(&state->owner->so_lock);
8bda4e4c 1534 write_seqlock(&state->seqlock);
003707c7 1535 if (deleg_stateid != NULL) {
f597c537 1536 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1537 set_bit(NFS_DELEGATED_STATE, &state->flags);
1538 }
1539 if (open_stateid != NULL)
1393d961 1540 nfs_set_open_stateid_locked(state, open_stateid, fmode, freeme);
8bda4e4c 1541 write_sequnlock(&state->seqlock);
dc0b027d 1542 update_open_stateflags(state, fmode);
ec073428 1543 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1544}
1545
1393d961
TM		 1546static int update_open_stateid(struct nfs4_state *state,
1547 const nfs4_stateid *open_stateid,
1548 const nfs4_stateid *delegation,
1549 fmode_t fmode)
34310430 1550{
1393d961
TM		 1551 struct nfs_server *server = NFS_SERVER(state->inode);
1552 struct nfs_client *clp = server->nfs_client;
34310430
TM		 1553 struct nfs_inode *nfsi = NFS_I(state->inode);
1554 struct nfs_delegation *deleg_cur;
83aa3e0f 1555 nfs4_stateid freeme = { };
34310430
TM		 1556 int ret = 0;
1557
dc0b027d 1558 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1559
1560 rcu_read_lock();
1561 deleg_cur = rcu_dereference(nfsi->delegation);
1562 if (deleg_cur == NULL)
1563 goto no_delegation;
1564
1565 spin_lock(&deleg_cur->lock);
17f26b12 1566 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1567 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1568 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1569 goto no_delegation_unlock;
1570
1571 if (delegation == NULL)
1572 delegation = &deleg_cur->stateid;
f597c537 1573 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1574 goto no_delegation_unlock;
1575
b7391f44 1576 nfs_mark_delegation_referenced(deleg_cur);
1393d961
TM		 1577 __update_open_stateid(state, open_stateid, &deleg_cur->stateid,
1578 fmode, &freeme);
34310430
TM		 1579 ret = 1;
1580no_delegation_unlock:
1581 spin_unlock(&deleg_cur->lock);
1582no_delegation:
1583 rcu_read_unlock();
1584
1585 if (!ret && open_stateid != NULL) {
1393d961 1586 __update_open_stateid(state, open_stateid, NULL, fmode, &freeme);
34310430
TM		 1587 ret = 1;
1588 }
4f14c194 1589 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1393d961
TM		 1590 nfs4_schedule_state_manager(clp);
1591 if (freeme.type != 0)
1592 nfs4_test_and_free_stateid(server, &freeme,
1593 state->owner->so_cred);
34310430
TM		 1594
1595 return ret;
1596}
1597
39071e6f
TM		 1598static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1599 const nfs4_stateid *stateid)
1600{
1601 struct nfs4_state *state = lsp->ls_state;
1602 bool ret = false;
1603
1604 spin_lock(&state->state_lock);
1605 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1606 goto out_noupdate;
1607 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1608 goto out_noupdate;
1609 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1610 ret = true;
1611out_noupdate:
1612 spin_unlock(&state->state_lock);
1613 return ret;
1614}
34310430 1615
dc0b027d 1616static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1617{
1618 struct nfs_delegation *delegation;
1619
1620 rcu_read_lock();
1621 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1622 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1623 rcu_read_unlock();
1624 return;
1625 }
1626 rcu_read_unlock();
57ec14c5 1627 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1628}
1629
6ee41268 1630static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1631{
1632 struct nfs4_state *state = opendata->state;
1633 struct nfs_inode *nfsi = NFS_I(state->inode);
1634 struct nfs_delegation *delegation;
f448badd 1635 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1636 fmode_t fmode = opendata->o_arg.fmode;
2a606188 1637 enum open_claim_type4 claim = opendata->o_arg.claim;
aac00a8d
TM		 1638 nfs4_stateid stateid;
1639 int ret = -EAGAIN;
1640
aac00a8d 1641 for (;;) {
61beef75 1642 spin_lock(&state->owner->so_lock);
dc0b027d 1643 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1644 update_open_stateflags(state, fmode);
6ee41268 1645 spin_unlock(&state->owner->so_lock);
61beef75 1646 goto out_return_state;
6ee41268 1647 }
61beef75 1648 spin_unlock(&state->owner->so_lock);
34310430
TM		 1649 rcu_read_lock();
1650 delegation = rcu_dereference(nfsi->delegation);
2a606188 1651 if (!can_open_delegated(delegation, fmode, claim)) {
34310430 1652 rcu_read_unlock();
aac00a8d 1653 break;
34310430 1654 }
aac00a8d 1655 /* Save the delegation */
f597c537 1656 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1657 rcu_read_unlock();
fa332941 1658 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1659 if (!opendata->is_recover) {
1660 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1661 if (ret != 0)
1662 goto out;
1663 }
aac00a8d 1664 ret = -EAGAIN;
34310430
TM		 1665
1666 /* Try to update the stateid using the delegation */
dc0b027d 1667 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1668 goto out_return_state;
aac00a8d 1669 }
aac00a8d
TM		 1670out:
1671 return ERR_PTR(ret);
1672out_return_state:
1673 atomic_inc(&state->count);
1674 return state;
1675}
1676
e23008ec
AA		 1677static void
1678nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1679{
1680 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1681 struct nfs_delegation *delegation;
1682 int delegation_flags = 0;
1683
1684 rcu_read_lock();
1685 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1686 if (delegation)
1687 delegation_flags = delegation->flags;
1688 rcu_read_unlock();
72d79ff8
TM		 1689 switch (data->o_arg.claim) {
1690 default:
1691 break;
1692 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1693 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
e23008ec
AA		 1694 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1695 "returning a delegation for "
1696 "OPEN(CLAIM_DELEGATE_CUR)\n",
1697 clp->cl_hostname);
72d79ff8
TM		 1698 return;
1699 }
1700 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
e23008ec
AA		 1701 nfs_inode_set_delegation(state->inode,
1702 data->owner->so_cred,
1703 &data->o_res);
1704 else
1705 nfs_inode_reclaim_delegation(state->inode,
1706 data->owner->so_cred,
1707 &data->o_res);
1708}
1709
1710/*
1711 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1712 * and update the nfs4_state.
1713 */
1714static struct nfs4_state *
1715_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1716{
1717 struct inode *inode = data->state->inode;
1718 struct nfs4_state *state = data->state;
1719 int ret;
1720
d2bfda2e
WAA		 1721 if (!data->rpc_done) {
1722 if (data->rpc_status) {
1723 ret = data->rpc_status;
1724 goto err;
1725 }
1726 /* cached opens have already been processed */
1727 goto update;
e23008ec
AA		 1728 }
1729
e23008ec
AA		 1730 ret = nfs_refresh_inode(inode, &data->f_attr);
1731 if (ret)
1732 goto err;
1733
1734 if (data->o_res.delegation_type != 0)
1735 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1736update:
e23008ec
AA		 1737 update_open_stateid(state, &data->o_res.stateid, NULL,
1738 data->o_arg.fmode);
d49f042a 1739 atomic_inc(&state->count);
e23008ec
AA		 1740
1741 return state;
1742err:
1743 return ERR_PTR(ret);
1744
1745}
1746
1747static struct nfs4_state *
1748_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1749{
1750 struct inode *inode;
1751 struct nfs4_state *state = NULL;
1b370bc2 1752 int ret;
24ac23ab 1753
aac00a8d 1754 if (!data->rpc_done) {
6ee41268 1755 state = nfs4_try_open_cached(data);
9759b0fb 1756 trace_nfs4_cached_open(data->state);
aac00a8d
TM		 1757 goto out;
1758 }
1759
1b370bc2 1760 ret = -EAGAIN;
24ac23ab 1761 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1762 goto err;
1775fd3e 1763 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1764 ret = PTR_ERR(inode);
03f28e3a 1765 if (IS_ERR(inode))
1b370bc2
TM		 1766 goto err;
1767 ret = -ENOMEM;
24ac23ab
TM		 1768 state = nfs4_get_open_state(inode, data->owner);
1769 if (state == NULL)
1b370bc2 1770 goto err_put_inode;
e23008ec
AA		 1771 if (data->o_res.delegation_type != 0)
1772 nfs4_opendata_check_deleg(data, state);
34310430 1773 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1774 data->o_arg.fmode);
24ac23ab 1775 iput(inode);
aac00a8d 1776out:
7aa262b5 1777 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1778 return state;
1b370bc2
TM		 1779err_put_inode:
1780 iput(inode);
1781err:
1782 return ERR_PTR(ret);
24ac23ab
TM		 1783}
1784
e23008ec
AA		 1785static struct nfs4_state *
1786nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1787{
2e80dbe7
TM		 1788 struct nfs4_state *ret;
1789
e23008ec 1790 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
2e80dbe7
TM		 1791 ret =_nfs4_opendata_reclaim_to_nfs4_state(data);
1792 else
1793 ret = _nfs4_opendata_to_nfs4_state(data);
1794 nfs4_sequence_free_slot(&data->o_res.seq_res);
1795 return ret;
e23008ec
AA		 1796}
1797
864472e9
TM		 1798static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1799{
1800 struct nfs_inode *nfsi = NFS_I(state->inode);
1801 struct nfs_open_context *ctx;
1802
1803 spin_lock(&state->inode->i_lock);
1804 list_for_each_entry(ctx, &nfsi->open_files, list) {
1805 if (ctx->state != state)
1806 continue;
1807 get_nfs_open_context(ctx);
1808 spin_unlock(&state->inode->i_lock);
1809 return ctx;
1810 }
1811 spin_unlock(&state->inode->i_lock);
1812 return ERR_PTR(-ENOENT);
1813}
1814
4a1c0893
TM		 1815static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1816 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1817{
1818 struct nfs4_opendata *opendata;
1819
4a1c0893 1820 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1821 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1822 if (opendata == NULL)
1823 return ERR_PTR(-ENOMEM);
1824 opendata->state = state;
1825 atomic_inc(&state->count);
1826 return opendata;
1827}
1828
24311f88
TM		 1829static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1830 fmode_t fmode)
864472e9 1831{
2ced46c2 1832 struct nfs4_state *newstate;
864472e9
TM		 1833 int ret;
1834
24311f88 1835 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
39f897fd 1836 return 0;
dc0b027d
TM		 1837 opendata->o_arg.open_flags = 0;
1838 opendata->o_arg.fmode = fmode;
be36e185
TM		 1839 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1840 NFS_SB(opendata->dentry->d_sb),
1841 fmode, 0);
2ced46c2
TM		 1842 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1843 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1844 nfs4_init_opendata_res(opendata);
b257957e 1845 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1846 if (ret != 0)
1847 return ret;
2ced46c2 1848 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1849 if (IS_ERR(newstate))
1850 return PTR_ERR(newstate);
24311f88
TM		 1851 if (newstate != opendata->state)
1852 ret = -ESTALE;
643168c2 1853 nfs4_close_state(newstate, fmode);
24311f88 1854 return ret;
864472e9
TM		 1855}
1856
1857static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1858{
864472e9
TM		 1859 int ret;
1860
4f14c194
TM		 1861 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1862 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1863 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1864 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1865 /* memory barrier prior to reading state->n_* */
2ced46c2 1866 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1867 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9 1868 smp_rmb();
24311f88
TM		 1869 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1870 if (ret != 0)
1871 return ret;
1872 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1873 if (ret != 0)
1874 return ret;
1875 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1876 if (ret != 0)
1877 return ret;
1ac7e2fd
TM		 1878 /*
1879 * We may have performed cached opens for all three recoveries.
1880 * Check if we need to update the current stateid.
1881 */
1882 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1883 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1884 write_seqlock(&state->seqlock);
1ac7e2fd 1885 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1886 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1887 write_sequnlock(&state->seqlock);
1ac7e2fd 1888 }
864472e9
TM		 1889 return 0;
1890}
1891
1da177e4
LT		 1892/*
1893 * OPEN_RECLAIM:
1894 * reclaim state on the server after a reboot.
1da177e4 1895 */
539cd03a 1896static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1897{
1ac7e2fd 1898 struct nfs_delegation *delegation;
864472e9 1899 struct nfs4_opendata *opendata;
dc0b027d 1900 fmode_t delegation_type = 0;
1da177e4
LT		 1901 int status;
1902
4a1c0893
TM		 1903 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1904 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1905 if (IS_ERR(opendata))
1906 return PTR_ERR(opendata);
1ac7e2fd
TM		 1907 rcu_read_lock();
1908 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1909 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1910 delegation_type = delegation->type;
1ac7e2fd 1911 rcu_read_unlock();
864472e9
TM		 1912 opendata->o_arg.u.delegation_type = delegation_type;
1913 status = nfs4_open_recover(opendata, state);
c6d00e63 1914 nfs4_opendata_put(opendata);
1da177e4
LT		 1915 return status;
1916}
1917
539cd03a 1918static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1919{
1920 struct nfs_server *server = NFS_SERVER(state->inode);
1921 struct nfs4_exception exception = { };
1922 int err;
1923 do {
539cd03a 1924 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1925 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1926 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1927 continue;
168667c4 1928 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1929 break;
1930 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1931 } while (exception.retry);
1932 return err;
1933}
1934
864472e9
TM		 1935static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1936{
1937 struct nfs_open_context *ctx;
1938 int ret;
1939
1940 ctx = nfs4_state_find_open_context(state);
1941 if (IS_ERR(ctx))
91876b13 1942 return -EAGAIN;
539cd03a 1943 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1944 put_nfs_open_context(ctx);
1945 return ret;
1946}
1947
db4f2e63 1948static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1949{
be76b5b6
TM		 1950 switch (err) {
1951 default:
1952 printk(KERN_ERR "NFS: %s: unhandled error "
1953 "%d.\n", __func__, err);
1954 case 0:
1955 case -ENOENT:
8eee52af 1956 case -EAGAIN:
be76b5b6
TM		 1957 case -ESTALE:
1958 break;
1959 case -NFS4ERR_BADSESSION:
1960 case -NFS4ERR_BADSLOT:
1961 case -NFS4ERR_BAD_HIGH_SLOT:
1962 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1963 case -NFS4ERR_DEADSESSION:
1964 set_bit(NFS_DELEGATED_STATE, &state->flags);
1965 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1966 return -EAGAIN;
1967 case -NFS4ERR_STALE_CLIENTID:
1968 case -NFS4ERR_STALE_STATEID:
1969 set_bit(NFS_DELEGATED_STATE, &state->flags);
be76b5b6
TM		 1970 /* Don't recall a delegation if it was lost */
1971 nfs4_schedule_lease_recovery(server->nfs_client);
1972 return -EAGAIN;
352297b9
CL		 1973 case -NFS4ERR_MOVED:
1974 nfs4_schedule_migration_recovery(server);
1975 return -EAGAIN;
8ef2f8d4
CL		 1976 case -NFS4ERR_LEASE_MOVED:
1977 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1978 return -EAGAIN;
be76b5b6
TM		 1979 case -NFS4ERR_DELEG_REVOKED:
1980 case -NFS4ERR_ADMIN_REVOKED:
404ea356 1981 case -NFS4ERR_EXPIRED:
be76b5b6 1982 case -NFS4ERR_BAD_STATEID:
db4f2e63 1983 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1984 nfs_inode_find_state_and_recover(state->inode,
1985 stateid);
1986 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1987 return -EAGAIN;
be76b5b6
TM		 1988 case -NFS4ERR_DELAY:
1989 case -NFS4ERR_GRACE:
1990 set_bit(NFS_DELEGATED_STATE, &state->flags);
1991 ssleep(1);
1992 return -EAGAIN;
db4f2e63
TM		 1993 case -ENOMEM:
1994 case -NFS4ERR_DENIED:
1995 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1996 return 0;
be76b5b6 1997 }
1da177e4
LT		 1998 return err;
1999}
2000
24311f88
TM		 2001int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
2002 struct nfs4_state *state, const nfs4_stateid *stateid,
2003 fmode_t type)
db4f2e63
TM		 2004{
2005 struct nfs_server *server = NFS_SERVER(state->inode);
2006 struct nfs4_opendata *opendata;
24311f88 2007 int err = 0;
db4f2e63
TM		 2008
2009 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2010 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
2011 if (IS_ERR(opendata))
2012 return PTR_ERR(opendata);
2013 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
5e99b532
JL		 2014 write_seqlock(&state->seqlock);
2015 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2016 write_sequnlock(&state->seqlock);
24311f88
TM		 2017 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2018 switch (type & (FMODE_READ|FMODE_WRITE)) {
2019 case FMODE_READ|FMODE_WRITE:
2020 case FMODE_WRITE:
2021 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
2022 if (err)
2023 break;
2024 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
2025 if (err)
2026 break;
2027 case FMODE_READ:
2028 err = nfs4_open_recover_helper(opendata, FMODE_READ);
2029 }
db4f2e63
TM		 2030 nfs4_opendata_put(opendata);
2031 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
2032}
2033
be05c860
CL		 2034static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
2035{
2036 struct nfs4_opendata *data = calldata;
2037
cb04ad2a
PT		 2038 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
2039 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 2040}
2041
cdd4e68b
TM		 2042static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
2043{
2044 struct nfs4_opendata *data = calldata;
2045
17ead6c8 2046 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 2047
cdd4e68b 2048 data->rpc_status = task->tk_status;
26e976a8 2049 if (data->rpc_status == 0) {
f597c537 2050 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 2051 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 2052 renew_lease(data->o_res.server, data->timestamp);
3e309914 2053 data->rpc_done = 1;
26e976a8 2054 }
cdd4e68b
TM		 2055}
2056
2057static void nfs4_open_confirm_release(void *calldata)
2058{
2059 struct nfs4_opendata *data = calldata;
2060 struct nfs4_state *state = NULL;
2061
2062 /* If this request hasn't been cancelled, do nothing */
2063 if (data->cancelled == 0)
2064 goto out_free;
2065 /* In case of error, no cleanup! */
3e309914 2066 if (!data->rpc_done)
cdd4e68b 2067 goto out_free;
cdd4e68b 2068 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2069 if (!IS_ERR(state))
643168c2 2070 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 2071out_free:
c6d00e63 2072 nfs4_opendata_put(data);
cdd4e68b
TM		 2073}
2074
2075static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 2076 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 2077 .rpc_call_done = nfs4_open_confirm_done,
2078 .rpc_release = nfs4_open_confirm_release,
2079};
2080
2081/*
2082 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
2083 */
2084static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
2085{
2b0143b5 2086 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 2087 struct rpc_task *task;
5138fde0
TM		 2088 struct rpc_message msg = {
2089 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
2090 .rpc_argp = &data->c_arg,
2091 .rpc_resp = &data->c_res,
2092 .rpc_cred = data->owner->so_cred,
2093 };
c970aa85
TM		 2094 struct rpc_task_setup task_setup_data = {
2095 .rpc_client = server->client,
5138fde0 2096 .rpc_message = &msg,
c970aa85
TM		 2097 .callback_ops = &nfs4_open_confirm_ops,
2098 .callback_data = data,
101070ca 2099 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2100 .flags = RPC_TASK_ASYNC,
2101 };
1da177e4
LT		 2102 int status;
2103
17ead6c8 2104 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 2105 kref_get(&data->kref);
3e309914
TM		 2106 data->rpc_done = 0;
2107 data->rpc_status = 0;
5138fde0 2108 data->timestamp = jiffies;
e92c1e0d
BC		 2109 if (data->is_recover)
2110 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
c970aa85 2111 task = rpc_run_task(&task_setup_data);
7a1218a2 2112 if (IS_ERR(task))
cdd4e68b 2113 return PTR_ERR(task);
cdd4e68b
TM		 2114 status = nfs4_wait_for_completion_rpc_task(task);
2115 if (status != 0) {
2116 data->cancelled = 1;
2117 smp_wmb();
2118 } else
2119 status = data->rpc_status;
e6b3c4db 2120 rpc_put_task(task);
1da177e4
LT		 2121 return status;
2122}
2123
24ac23ab 2124static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 2125{
24ac23ab
TM		 2126 struct nfs4_opendata *data = calldata;
2127 struct nfs4_state_owner *sp = data->owner;
549b19cc 2128 struct nfs_client *clp = sp->so_server->nfs_client;
2a606188 2129 enum open_claim_type4 claim = data->o_arg.claim;
5138fde0 2130
24ac23ab 2131 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 2132 goto out_wait;
aac00a8d
TM		 2133 /*
2134 * Check if we still need to send an OPEN call, or if we can use
2135 * a delegation instead.
2136 */
2137 if (data->state != NULL) {
2138 struct nfs_delegation *delegation;
2139
dc0b027d 2140 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 2141 goto out_no_action;
aac00a8d
TM		 2142 rcu_read_lock();
2143 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2a606188 2144 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
652f89f6 2145 goto unlock_no_action;
aac00a8d
TM		 2146 rcu_read_unlock();
2147 }
95b72eb0 2148 /* Update client id. */
549b19cc 2149 data->o_arg.clientid = clp->cl_clientid;
2a606188
TM		 2150 switch (claim) {
2151 default:
2152 break;
8188df17
TM		 2153 case NFS4_OPEN_CLAIM_PREVIOUS:
2154 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2155 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 2156 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 2157 case NFS4_OPEN_CLAIM_FH:
2158 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 2159 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
2160 }
26e976a8 2161 data->timestamp = jiffies;
035168ab 2162 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 2163 &data->o_arg.seq_args,
2240a9e2
TM		 2164 &data->o_res.seq_res,
2165 task) != 0)
2166 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 2167
2168 /* Set the create mode (note dependency on the session type) */
2169 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2170 if (data->o_arg.open_flags & O_EXCL) {
2171 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2172 if (nfs4_has_persistent_session(clp))
2173 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2174 else if (clp->cl_mvops->minor_version > 0)
2175 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2176 }
6ee41268 2177 return;
652f89f6 2178unlock_no_action:
9759b0fb 2179 trace_nfs4_cached_open(data->state);
652f89f6 2180 rcu_read_unlock();
6ee41268
TM		 2181out_no_action:
2182 task->tk_action = NULL;
c8da19b9 2183out_wait:
b75ad4cd 2184 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 2185}
2186
24ac23ab
TM		 2187static void nfs4_open_done(struct rpc_task *task, void *calldata)
2188{
2189 struct nfs4_opendata *data = calldata;
1da177e4 2190
24ac23ab 2191 data->rpc_status = task->tk_status;
d898528c 2192
2e80dbe7 2193 if (!nfs4_sequence_process(task, &data->o_res.seq_res))
14516c3a 2194 return;
d898528c 2195
24ac23ab 2196 if (task->tk_status == 0) {
807d66d8
TM		 2197 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2198 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 2199 case S_IFREG:
2200 break;
2201 case S_IFLNK:
24ac23ab 2202 data->rpc_status = -ELOOP;
6f926b5b
TM		 2203 break;
2204 case S_IFDIR:
24ac23ab 2205 data->rpc_status = -EISDIR;
6f926b5b
TM		 2206 break;
2207 default:
24ac23ab 2208 data->rpc_status = -ENOTDIR;
807d66d8 2209 }
6f926b5b 2210 }
26e976a8 2211 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 2212 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2213 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 2214 }
3e309914 2215 data->rpc_done = 1;
24ac23ab 2216}
6f926b5b 2217
24ac23ab
TM		 2218static void nfs4_open_release(void *calldata)
2219{
2220 struct nfs4_opendata *data = calldata;
2221 struct nfs4_state *state = NULL;
2222
2223 /* If this request hasn't been cancelled, do nothing */
2224 if (data->cancelled == 0)
2225 goto out_free;
2226 /* In case of error, no cleanup! */
3e309914 2227 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 2228 goto out_free;
2229 /* In case we need an open_confirm, no cleanup! */
2230 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2231 goto out_free;
24ac23ab 2232 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2233 if (!IS_ERR(state))
643168c2 2234 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 2235out_free:
c6d00e63 2236 nfs4_opendata_put(data);
24ac23ab
TM		 2237}
2238
2239static const struct rpc_call_ops nfs4_open_ops = {
2240 .rpc_call_prepare = nfs4_open_prepare,
2241 .rpc_call_done = nfs4_open_done,
2242 .rpc_release = nfs4_open_release,
2243};
2244
b257957e 2245static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab 2246{
2b0143b5 2247 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 2248 struct nfs_server *server = NFS_SERVER(dir);
2249 struct nfs_openargs *o_arg = &data->o_arg;
2250 struct nfs_openres *o_res = &data->o_res;
2251 struct rpc_task *task;
5138fde0
TM		 2252 struct rpc_message msg = {
2253 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2254 .rpc_argp = o_arg,
2255 .rpc_resp = o_res,
2256 .rpc_cred = data->owner->so_cred,
2257 };
c970aa85
TM		 2258 struct rpc_task_setup task_setup_data = {
2259 .rpc_client = server->client,
5138fde0 2260 .rpc_message = &msg,
c970aa85
TM		 2261 .callback_ops = &nfs4_open_ops,
2262 .callback_data = data,
101070ca 2263 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2264 .flags = RPC_TASK_ASYNC,
2265 };
24ac23ab
TM		 2266 int status;
2267
a9c92d6b 2268 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 2269 kref_get(&data->kref);
3e309914
TM		 2270 data->rpc_done = 0;
2271 data->rpc_status = 0;
2ced46c2 2272 data->cancelled = 0;
bdeca1b7
TM		 2273 data->is_recover = 0;
2274 if (isrecover) {
8fe72bac 2275 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 2276 data->is_recover = 1;
2277 }
c970aa85 2278 task = rpc_run_task(&task_setup_data);
b257957e
AB		 2279 if (IS_ERR(task))
2280 return PTR_ERR(task);
2281 status = nfs4_wait_for_completion_rpc_task(task);
2282 if (status != 0) {
2283 data->cancelled = 1;
2284 smp_wmb();
2285 } else
2286 status = data->rpc_status;
2287 rpc_put_task(task);
2288
2289 return status;
2290}
2291
2292static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2293{
2b0143b5 2294 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2295 struct nfs_openres *o_res = &data->o_res;
2296 int status;
2297
2298 status = nfs4_run_open_task(data, 1);
2299 if (status != 0 || !data->rpc_done)
2300 return status;
2301
6926afd1
TM		 2302 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2303
b257957e
AB		 2304 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2305 status = _nfs4_proc_open_confirm(data);
2306 if (status != 0)
2307 return status;
2308 }
2309
2310 return status;
2311}
2312
f3792d63
TM		 2313/*
2314 * Additional permission checks in order to distinguish between an
2315 * open for read, and an open for execute. This works around the
2316 * fact that NFSv4 OPEN treats read and execute permissions as being
2317 * the same.
2318 * Note that in the non-execute case, we want to turn off permission
2319 * checking if we just created a new file (POSIX open() semantics).
2320 */
6168f62c
WAA		 2321static int nfs4_opendata_access(struct rpc_cred *cred,
2322 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2323 struct nfs4_state *state, fmode_t fmode,
2324 int openflags)
6168f62c
WAA		 2325{
2326 struct nfs_access_entry cache;
2327 u32 mask;
2328
2329 /* access call failed or for some reason the server doesn't
2330 * support any access modes -- defer access call until later */
2331 if (opendata->o_res.access_supported == 0)
2332 return 0;
2333
2334 mask = 0;
f3792d63
TM		 2335 /*
2336 * Use openflags to check for exec, because fmode won't
2337 * always have FMODE_EXEC set when file open for exec.
2338 */
f8d9a897
WAA		 2339 if (openflags & __FMODE_EXEC) {
2340 /* ONLY check for exec rights */
2341 mask = MAY_EXEC;
f3792d63 2342 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2343 mask = MAY_READ;
6168f62c
WAA		 2344
2345 cache.cred = cred;
2346 cache.jiffies = jiffies;
2347 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2348 nfs_access_add_cache(state->inode, &cache);
2349
bbd3a8ee 2350 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2351 return 0;
2352
2353 /* even though OPEN succeeded, access is denied. Close the file */
2354 nfs4_close_state(state, fmode);
998f40b5 2355 return -EACCES;
6168f62c
WAA		 2356}
2357
b257957e
AB		 2358/*
2359 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2360 */
2361static int _nfs4_proc_open(struct nfs4_opendata *data)
2362{
2b0143b5 2363 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2364 struct nfs_server *server = NFS_SERVER(dir);
2365 struct nfs_openargs *o_arg = &data->o_arg;
2366 struct nfs_openres *o_res = &data->o_res;
2367 int status;
2368
2369 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2370 if (!data->rpc_done)
2371 return status;
2372 if (status != 0) {
2373 if (status == -NFS4ERR_BADNAME &&
2374 !(o_arg->open_flags & O_CREAT))
2375 return -ENOENT;
24ac23ab 2376 return status;
08ef7bd3 2377 }
24ac23ab 2378
6926afd1
TM		 2379 nfs_fattr_map_and_free_names(server, &data->f_attr);
2380
5bc2afc2 2381 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2382 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2383 if (o_arg->open_flags & O_EXCL)
2384 data->file_created = 1;
2385 else if (o_res->cinfo.before != o_res->cinfo.after)
2386 data->file_created = 1;
2387 }
0df5dd4a
TM		 2388 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2389 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2390 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2391 status = _nfs4_proc_open_confirm(data);
1da177e4 2392 if (status != 0)
24ac23ab 2393 return status;
1da177e4
LT		 2394 }
2395 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2396 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2397 return 0;
1da177e4
LT		 2398}
2399
d83217c1
AA		 2400static int nfs4_recover_expired_lease(struct nfs_server *server)
2401{
2402 return nfs4_client_recover_expired_lease(server->nfs_client);
2403}
2404
1da177e4
LT		 2405/*
2406 * OPEN_EXPIRED:
2407 * reclaim state on the server after a network partition.
2408 * Assumes caller holds the appropriate lock
2409 */
539cd03a 2410static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2411{
e56e0b78 2412 struct nfs4_opendata *opendata;
864472e9 2413 int ret;
1da177e4 2414
4a1c0893 2415 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2416 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2417 if (IS_ERR(opendata))
2418 return PTR_ERR(opendata);
864472e9 2419 ret = nfs4_open_recover(opendata, state);
35d05778 2420 if (ret == -ESTALE)
3d4ff43d 2421 d_drop(ctx->dentry);
c6d00e63 2422 nfs4_opendata_put(opendata);
864472e9 2423 return ret;
1da177e4
LT		 2424}
2425
a9ed2e25 2426static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2427{
539cd03a 2428 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2429 struct nfs4_exception exception = { };
2430 int err;
2431
2432 do {
539cd03a 2433 err = _nfs4_open_expired(ctx, state);
42113a75 2434 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2435 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2436 continue;
a9ed2e25
TM		 2437 switch (err) {
2438 default:
2439 goto out;
2440 case -NFS4ERR_GRACE:
2441 case -NFS4ERR_DELAY:
2442 nfs4_handle_exception(server, err, &exception);
2443 err = 0;
2444 }
202b50dc 2445 } while (exception.retry);
a9ed2e25 2446out:
202b50dc
TM		 2447 return err;
2448}
2449
1da177e4
LT		 2450static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2451{
1da177e4 2452 struct nfs_open_context *ctx;
864472e9 2453 int ret;
1da177e4 2454
864472e9
TM		 2455 ctx = nfs4_state_find_open_context(state);
2456 if (IS_ERR(ctx))
91876b13 2457 return -EAGAIN;
539cd03a 2458 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2459 put_nfs_open_context(ctx);
2460 return ret;
1da177e4
LT		 2461}
2462
41020b67
TM		 2463static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
2464 const nfs4_stateid *stateid)
4dfd4f7a 2465{
41020b67 2466 nfs_remove_bad_delegation(state->inode, stateid);
4dfd4f7a
TM		 2467 write_seqlock(&state->seqlock);
2468 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2469 write_sequnlock(&state->seqlock);
2470 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2471}
2472
2473static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2474{
2475 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
41020b67 2476 nfs_finish_clear_delegation_stateid(state, NULL);
4dfd4f7a
TM		 2477}
2478
2479static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2480{
2481 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2482 nfs40_clear_delegation_stateid(state);
2483 return nfs4_open_expired(sp, state);
2484}
2485
45870d69
TM		 2486static int nfs40_test_and_free_expired_stateid(struct nfs_server *server,
2487 nfs4_stateid *stateid,
2488 struct rpc_cred *cred)
2489{
2490 return -NFS4ERR_BAD_STATEID;
2491}
2492
f062eb6c 2493#if defined(CONFIG_NFS_V4_1)
4586f6e2
TM		 2494static int nfs41_test_and_free_expired_stateid(struct nfs_server *server,
2495 nfs4_stateid *stateid,
2496 struct rpc_cred *cred)
2497{
2498 int status;
2499
f7a62ada
TM		 2500 switch (stateid->type) {
2501 default:
2502 break;
2503 case NFS4_INVALID_STATEID_TYPE:
2504 case NFS4_SPECIAL_STATEID_TYPE:
2505 return -NFS4ERR_BAD_STATEID;
2506 case NFS4_REVOKED_STATEID_TYPE:
2507 goto out_free;
2508 }
4586f6e2 2509
f7a62ada 2510 status = nfs41_test_stateid(server, stateid, cred);
4586f6e2
TM		 2511 switch (status) {
2512 case -NFS4ERR_EXPIRED:
2513 case -NFS4ERR_ADMIN_REVOKED:
2514 case -NFS4ERR_DELEG_REVOKED:
f7a62ada
TM		 2515 break;
2516 default:
4586f6e2
TM		 2517 return status;
2518 }
f7a62ada
TM		 2519out_free:
2520 /* Ack the revoked state to the server */
f0b0bf88 2521 nfs41_free_stateid(server, stateid, cred, true);
f7a62ada 2522 return -NFS4ERR_EXPIRED;
4586f6e2
TM		 2523}
2524
0c116cad 2525static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2526{
f062eb6c 2527 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2528 nfs4_stateid stateid;
ab7cb0df 2529 struct nfs_delegation *delegation;
0c116cad
TM		 2530 struct rpc_cred *cred;
2531 int status;
3e60ffdd 2532
ab7cb0df
TM		 2533 /* Get the delegation credential for use by test/free_stateid */
2534 rcu_read_lock();
2535 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2536 if (delegation == NULL) {
ab7cb0df 2537 rcu_read_unlock();
0c116cad
TM		 2538 return;
2539 }
2540
2541 nfs4_stateid_copy(&stateid, &delegation->stateid);
4c8e5447
TM		 2542 if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags)) {
2543 rcu_read_unlock();
41020b67 2544 nfs_finish_clear_delegation_stateid(state, &stateid);
4c8e5447
TM		 2545 return;
2546 }
0c116cad 2547
63d63cbf
TM		 2548 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED, &delegation->flags)) {
2549 rcu_read_unlock();
2550 return;
2551 }
2552
0c116cad
TM		 2553 cred = get_rpccred(delegation->cred);
2554 rcu_read_unlock();
4586f6e2 2555 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
0c116cad 2556 trace_nfs4_test_delegation_stateid(state, NULL, status);
f7a62ada 2557 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID)
41020b67 2558 nfs_finish_clear_delegation_stateid(state, &stateid);
ab7cb0df 2559
0c116cad 2560 put_rpccred(cred);
3e60ffdd
CL		 2561}
2562
c5896fc8
TM		 2563/**
2564 * nfs41_check_expired_locks - possibly free a lock stateid
2565 *
2566 * @state: NFSv4 state for an inode
2567 *
2568 * Returns NFS_OK if recovery for this stateid is now finished.
2569 * Otherwise a negative NFS4ERR value is returned.
2570 */
2571static int nfs41_check_expired_locks(struct nfs4_state *state)
2572{
2573 int status, ret = NFS_OK;
d75a6a0e 2574 struct nfs4_lock_state *lsp, *prev = NULL;
c5896fc8
TM		 2575 struct nfs_server *server = NFS_SERVER(state->inode);
2576
2577 if (!test_bit(LK_STATE_IN_USE, &state->flags))
2578 goto out;
d75a6a0e
BC		 2579
2580 spin_lock(&state->state_lock);
c5896fc8
TM		 2581 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
2582 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
2583 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
2584
d75a6a0e
BC		 2585 atomic_inc(&lsp->ls_count);
2586 spin_unlock(&state->state_lock);
2587
2588 nfs4_put_lock_state(prev);
2589 prev = lsp;
2590
c5896fc8
TM		 2591 status = nfs41_test_and_free_expired_stateid(server,
2592 &lsp->ls_stateid,
2593 cred);
2594 trace_nfs4_test_lock_stateid(state, lsp, status);
2595 if (status == -NFS4ERR_EXPIRED ||
2596 status == -NFS4ERR_BAD_STATEID) {
2597 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
67dd4830 2598 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE;
c5896fc8
TM		 2599 if (!recover_lost_locks)
2600 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2601 } else if (status != NFS_OK) {
2602 ret = status;
d75a6a0e
BC		 2603 nfs4_put_lock_state(prev);
2604 goto out;
c5896fc8 2605 }
d75a6a0e 2606 spin_lock(&state->state_lock);
c5896fc8 2607 }
d75a6a0e
BC		 2608 }
2609 spin_unlock(&state->state_lock);
2610 nfs4_put_lock_state(prev);
c5896fc8
TM		 2611out:
2612 return ret;
2613}
2614
3e60ffdd
CL		 2615/**
2616 * nfs41_check_open_stateid - possibly free an open stateid
2617 *
2618 * @state: NFSv4 state for an inode
2619 *
2620 * Returns NFS_OK if recovery for this stateid is now finished.
2621 * Otherwise a negative NFS4ERR value is returned.
2622 */
2623static int nfs41_check_open_stateid(struct nfs4_state *state)
2624{
2625 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2626 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2627 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2628 int status;
2629
b134fc4a 2630 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) {
8a64c4ef
TM		 2631 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) {
2632 if (nfs4_have_delegation(state->inode, state->state))
2633 return NFS_OK;
2634 return -NFS4ERR_OPENMODE;
2635 }
3e60ffdd 2636 return -NFS4ERR_BAD_STATEID;
b134fc4a 2637 }
4586f6e2 2638 status = nfs41_test_and_free_expired_stateid(server, stateid, cred);
08cb47fa 2639 trace_nfs4_test_open_stateid(state, NULL, status);
f7a62ada 2640 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) {
3e60ffdd
CL		 2641 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2642 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2643 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2644 clear_bit(NFS_OPEN_STATE, &state->flags);
67dd4830 2645 stateid->type = NFS4_INVALID_STATEID_TYPE;
b01dd1d8 2646 }
8a64c4ef
TM		 2647 if (status != NFS_OK)
2648 return status;
2649 if (nfs_open_stateid_recover_openmode(state))
2650 return -NFS4ERR_OPENMODE;
2651 return NFS_OK;
b01dd1d8
BS		 2652}
2653
2654static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2655{
eb64cf96 2656 int status;
b01dd1d8 2657
0c116cad 2658 nfs41_check_delegation_stateid(state);
c5896fc8
TM		 2659 status = nfs41_check_expired_locks(state);
2660 if (status != NFS_OK)
2661 return status;
3e60ffdd 2662 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2663 if (status != NFS_OK)
2664 status = nfs4_open_expired(sp, state);
2665 return status;
f062eb6c
BS		 2666}
2667#endif
2668
aa53ed54
JL		 2669/*
2670 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2671 * fields corresponding to attributes that were used to store the verifier.
2672 * Make sure we clobber those fields in the later setattr call
2673 */
5334c5bd
KM		 2674static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2675 struct iattr *sattr, struct nfs4_label **label)
aa53ed54 2676{
5334c5bd
KM		 2677 const u32 *attrset = opendata->o_res.attrset;
2678
2679 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
aa53ed54
JL		 2680 !(sattr->ia_valid & ATTR_ATIME_SET))
2681 sattr->ia_valid |= ATTR_ATIME;
2682
5334c5bd 2683 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
aa53ed54
JL		 2684 !(sattr->ia_valid & ATTR_MTIME_SET))
2685 sattr->ia_valid |= ATTR_MTIME;
5334c5bd
KM		 2686
2687 /* Except MODE, it seems harmless of setting twice. */
2688 if ((attrset[1] & FATTR4_WORD1_MODE))
2689 sattr->ia_valid &= ~ATTR_MODE;
2690
2691 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2692 *label = NULL;
aa53ed54
JL		 2693}
2694
c21443c2
TM		 2695static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2696 fmode_t fmode,
2697 int flags,
3efb9722 2698 struct nfs_open_context *ctx)
c21443c2
TM		 2699{
2700 struct nfs4_state_owner *sp = opendata->owner;
2701 struct nfs_server *server = sp->so_server;
275bb307 2702 struct dentry *dentry;
c21443c2
TM		 2703 struct nfs4_state *state;
2704 unsigned int seq;
2705 int ret;
2706
2707 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2708
2709 ret = _nfs4_proc_open(opendata);
dca78001 2710 if (ret != 0)
c21443c2
TM		 2711 goto out;
2712
2713 state = nfs4_opendata_to_nfs4_state(opendata);
2714 ret = PTR_ERR(state);
2715 if (IS_ERR(state))
2716 goto out;
2717 if (server->caps & NFS_CAP_POSIX_LOCK)
2718 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
a8ce377a
JL		 2719 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
2720 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
c21443c2 2721
275bb307 2722 dentry = opendata->dentry;
2b0143b5 2723 if (d_really_is_negative(dentry)) {
668d0cd5 2724 struct dentry *alias;
275bb307 2725 d_drop(dentry);
668d0cd5
AV		 2726 alias = d_exact_alias(dentry, state->inode);
2727 if (!alias)
2728 alias = d_splice_alias(igrab(state->inode), dentry);
2729 /* d_splice_alias() can't fail here - it's a non-directory */
2730 if (alias) {
275bb307 2731 dput(ctx->dentry);
668d0cd5 2732 ctx->dentry = dentry = alias;
275bb307
TM		 2733 }
2734 nfs_set_verifier(dentry,
2b0143b5 2735 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2736 }
2737
c21443c2
TM		 2738 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2739 if (ret != 0)
2740 goto out;
2741
3efb9722 2742 ctx->state = state;
2b0143b5 2743 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2744 nfs_inode_attach_open_context(ctx);
2745 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2746 nfs4_schedule_stateid_recovery(server, state);
2747 }
c21443c2
TM		 2748out:
2749 return ret;
2750}
2751
1da177e4 2752/*
24ac23ab 2753 * Returns a referenced nfs4_state
1da177e4 2754 */
82be417a 2755static int _nfs4_do_open(struct inode *dir,
4197a055 2756 struct nfs_open_context *ctx,
82be417a
AA		 2757 int flags,
2758 struct iattr *sattr,
5bc2afc2
TM		 2759 struct nfs4_label *label,
2760 int *opened)
1da177e4
LT		 2761{
2762 struct nfs4_state_owner *sp;
2763 struct nfs4_state *state = NULL;
2764 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2765 struct nfs4_opendata *opendata;
4197a055
TM		 2766 struct dentry *dentry = ctx->dentry;
2767 struct rpc_cred *cred = ctx->cred;
2768 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2769 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2770 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2771 struct nfs4_label *olabel = NULL;
aac00a8d 2772 int status;
1da177e4
LT		 2773
2774 /* Protect against reboot recovery conflicts */
1da177e4 2775 status = -ENOMEM;
d1e284d5
TM		 2776 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2777 if (sp == NULL) {
1da177e4
LT		 2778 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2779 goto out_err;
2780 }
58d9714a
TM		 2781 status = nfs4_recover_expired_lease(server);
2782 if (status != 0)
b4454fe1 2783 goto err_put_state_owner;
2b0143b5
DH		 2784 if (d_really_is_positive(dentry))
2785 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2786 status = -ENOMEM;
2b0143b5 2787 if (d_really_is_positive(dentry))
49f9a0fa 2788 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2789 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2790 label, claim, GFP_KERNEL);
e56e0b78 2791 if (opendata == NULL)
95d35cb4 2792 goto err_put_state_owner;
1da177e4 2793
14c43f76
DQ		 2794 if (label) {
2795 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2796 if (IS_ERR(olabel)) {
2797 status = PTR_ERR(olabel);
2798 goto err_opendata_put;
2799 }
2800 }
2801
e911b815
TM		 2802 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2803 if (!opendata->f_attr.mdsthreshold) {
2804 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2805 if (!opendata->f_attr.mdsthreshold)
2806 goto err_free_label;
2807 }
1549210f 2808 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2809 }
2b0143b5
DH		 2810 if (d_really_is_positive(dentry))
2811 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2812
3efb9722 2813 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2814 if (status != 0)
14c43f76 2815 goto err_free_label;
3efb9722 2816 state = ctx->state;
6168f62c 2817
efcbc04e 2818 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 2819 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
5334c5bd 2820 nfs4_exclusive_attrset(opendata, sattr, &label);
a1d1c4f1
TM		 2821 /*
2822 * send create attributes which was not set by open
2823 * with an extra setattr.
2824 */
2825 if (sattr->ia_valid & NFS4_VALID_ATTRS) {
2826 nfs_fattr_init(opendata->o_res.f_attr);
2827 status = nfs4_do_setattr(state->inode, cred,
2828 opendata->o_res.f_attr, sattr,
29b59f94 2829 ctx, label, olabel);
a1d1c4f1
TM		 2830 if (status == 0) {
2831 nfs_setattr_update_inode(state->inode, sattr,
2832 opendata->o_res.f_attr);
2833 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2834 }
1775fd3e 2835 }
0ab64e0e 2836 }
c5c3fb5f 2837 if (opened && opendata->file_created)
5bc2afc2 2838 *opened |= FILE_CREATED;
82be417a 2839
e911b815 2840 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2841 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2842 opendata->f_attr.mdsthreshold = NULL;
2843 }
82be417a 2844
14c43f76
DQ		 2845 nfs4_label_free(olabel);
2846
c6d00e63 2847 nfs4_opendata_put(opendata);
1da177e4 2848 nfs4_put_state_owner(sp);
1da177e4 2849 return 0;
14c43f76
DQ		 2850err_free_label:
2851 nfs4_label_free(olabel);
c6d00e63
TM		 2852err_opendata_put:
2853 nfs4_opendata_put(opendata);
e56e0b78
TM		 2854err_put_state_owner:
2855 nfs4_put_state_owner(sp);
1da177e4 2856out_err:
1da177e4
LT		 2857 return status;
2858}
2859
2860
82be417a 2861static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2862 struct nfs_open_context *ctx,
82be417a
AA		 2863 int flags,
2864 struct iattr *sattr,
5bc2afc2
TM		 2865 struct nfs4_label *label,
2866 int *opened)
1da177e4 2867{
49f9a0fa 2868 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2869 struct nfs4_exception exception = { };
2870 struct nfs4_state *res;
2871 int status;
2872
2873 do {
5bc2afc2 2874 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2875 res = ctx->state;
42113a75 2876 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2877 if (status == 0)
2878 break;
2879 /* NOTE: BAD_SEQID means the server and client disagree about the
2880 * book-keeping w.r.t. state-changing operations
2881 * (OPEN/CLOSE/LOCK/LOCKU...)
2882 * It is actually a sign of a bug on the client or on the server.
2883 *
2884 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2885 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2886 * have unhashed the old state_owner for us, and that we can
2887 * therefore safely retry using a new one. We should still warn
2888 * the user though...
2889 */
2890 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2891 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2892 " returned a bad sequence-id error!\n",
2893 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2894 exception.retry = 1;
2895 continue;
2896 }
550f5747
TM		 2897 /*
2898 * BAD_STATEID on OPEN means that the server cancelled our
2899 * state before it received the OPEN_CONFIRM.
2900 * Recover by retrying the request as per the discussion
2901 * on Page 181 of RFC3530.
2902 */
2903 if (status == -NFS4ERR_BAD_STATEID) {
2904 exception.retry = 1;
2905 continue;
2906 }
aac00a8d
TM		 2907 if (status == -EAGAIN) {
2908 /* We must have found a delegation */
2909 exception.retry = 1;
2910 continue;
2911 }
49f9a0fa
TM		 2912 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2913 continue;
2914 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2915 status, &exception));
2916 } while (exception.retry);
2917 return res;
2918}
2919
8487c479
TM		 2920static int _nfs4_do_setattr(struct inode *inode,
2921 struct nfs_setattrargs *arg,
2922 struct nfs_setattrres *res,
2923 struct rpc_cred *cred,
29b59f94 2924 struct nfs_open_context *ctx)
1da177e4 2925{
3e4f6290 2926 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2927 struct rpc_message msg = {
659bfcd6 2928 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
8487c479
TM		 2929 .rpc_argp = arg,
2930 .rpc_resp = res,
659bfcd6 2931 .rpc_cred = cred,
1da177e4 2932 };
abf4e13c 2933 struct rpc_cred *delegation_cred = NULL;
26e976a8 2934 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2935 fmode_t fmode;
2936 bool truncate;
65e4308d 2937 int status;
1da177e4 2938
8487c479 2939 nfs_fattr_init(res->fattr);
1da177e4 2940
ee3ae84e 2941 /* Servers should only apply open mode checks for file size changes */
8487c479 2942 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
ee3ae84e
TM		 2943 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2944
8487c479 2945 if (nfs4_copy_delegation_stateid(inode, fmode, &arg->stateid, &delegation_cred)) {
ee3ae84e 2946 /* Use that stateid */
29b59f94 2947 } else if (truncate && ctx != NULL) {
17393475 2948 struct nfs_lock_context *l_ctx;
29b59f94 2949 if (!nfs4_valid_open_stateid(ctx->state))
0418dae1 2950 return -EBADF;
17393475
N		 2951 l_ctx = nfs_get_lock_context(ctx);
2952 if (IS_ERR(l_ctx))
2953 return PTR_ERR(l_ctx);
2954 if (nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx,
8487c479 2955 &arg->stateid, &delegation_cred) == -EIO)
0418dae1 2956 return -EBADF;
08e9eac4 2957 } else
8487c479 2958 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
abf4e13c
TM		 2959 if (delegation_cred)
2960 msg.rpc_cred = delegation_cred;
1da177e4 2961
8487c479 2962 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
abf4e13c
TM		 2963
2964 put_rpccred(delegation_cred);
29b59f94 2965 if (status == 0 && ctx != NULL)
26e976a8 2966 renew_lease(server, timestamp);
8487c479 2967 trace_nfs4_setattr(inode, &arg->stateid, status);
65e4308d 2968 return status;
1da177e4
LT		 2969}
2970
659bfcd6
TM		 2971static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2972 struct nfs_fattr *fattr, struct iattr *sattr,
29b59f94 2973 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
1775fd3e 2974 struct nfs4_label *olabel)
1da177e4 2975{
3e4f6290 2976 struct nfs_server *server = NFS_SERVER(inode);
29b59f94 2977 struct nfs4_state *state = ctx ? ctx->state : NULL;
8487c479
TM		 2978 struct nfs_setattrargs arg = {
2979 .fh = NFS_FH(inode),
2980 .iap = sattr,
2981 .server = server,
2982 .bitmask = server->attr_bitmask,
2983 .label = ilabel,
2984 };
2985 struct nfs_setattrres res = {
2986 .fattr = fattr,
2987 .label = olabel,
2988 .server = server,
2989 };
a1d0b5ee
TM		 2990 struct nfs4_exception exception = {
2991 .state = state,
3114ea7a 2992 .inode = inode,
8487c479 2993 .stateid = &arg.stateid,
a1d0b5ee 2994 };
1da177e4 2995 int err;
8487c479
TM		 2996
2997 arg.bitmask = nfs4_bitmask(server, ilabel);
2998 if (ilabel)
2999 arg.bitmask = nfs4_bitmask(server, olabel);
3000
1da177e4 3001 do {
29b59f94 3002 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx);
451146be
TM		 3003 switch (err) {
3004 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 3005 if (!(sattr->ia_valid & ATTR_SIZE)) {
3006 pr_warn_once("NFSv4: server %s is incorrectly "
3007 "applying open mode checks to "
3008 "a SETATTR that is not "
3009 "changing file size.\n",
3010 server->nfs_client->cl_hostname);
3011 }
451146be
TM		 3012 if (state && !(state->state & FMODE_WRITE)) {
3013 err = -EBADF;
3014 if (sattr->ia_valid & ATTR_OPEN)
3015 err = -EACCES;
3016 goto out;
3017 }
3018 }
3019 err = nfs4_handle_exception(server, err, &exception);
1da177e4 3020 } while (exception.retry);
451146be 3021out:
1da177e4
LT		 3022 return err;
3023}
3024
500d701f
PT		 3025static bool
3026nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
3027{
3028 if (inode == NULL || !nfs_have_layout(inode))
3029 return false;
3030
3031 return pnfs_wait_on_layoutreturn(inode, task);
3032}
3033
1da177e4
LT		 3034struct nfs4_closedata {
3035 struct inode *inode;
3036 struct nfs4_state *state;
3037 struct nfs_closeargs arg;
3038 struct nfs_closeres res;
cf805165
TM		 3039 struct {
3040 struct nfs4_layoutreturn_args arg;
3041 struct nfs4_layoutreturn_res res;
3042 u32 roc_barrier;
3043 bool roc;
3044 } lr;
516a6af6 3045 struct nfs_fattr fattr;
26e976a8 3046 unsigned long timestamp;
1da177e4
LT		 3047};
3048
963d8fe5 3049static void nfs4_free_closedata(void *data)
9512135d 3050{
963d8fe5
TM		 3051 struct nfs4_closedata *calldata = data;
3052 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 3053 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 3054
cf805165 3055 if (calldata->lr.roc)
1c5bd76d
TM		 3056 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res,
3057 calldata->res.lr_ret);
9512135d
TM		 3058 nfs4_put_open_state(calldata->state);
3059 nfs_free_seqid(calldata->arg.seqid);
9512135d 3060 nfs4_put_state_owner(sp);
322b2b90 3061 nfs_sb_deactive(sb);
9512135d
TM		 3062 kfree(calldata);
3063}
3064
963d8fe5 3065static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 3066{
963d8fe5 3067 struct nfs4_closedata *calldata = data;
1da177e4 3068 struct nfs4_state *state = calldata->state;
1da177e4 3069 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 3070 nfs4_stateid *res_stateid = NULL;
1da177e4 3071
a3ca5651 3072 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 3073 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3074 return;
42113a75 3075 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
cf805165
TM		 3076
3077 /* Handle Layoutreturn errors */
3078 if (calldata->arg.lr_args && task->tk_status != 0) {
3079 switch (calldata->res.lr_ret) {
3080 default:
3081 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
3082 break;
3083 case 0:
3084 calldata->arg.lr_args = NULL;
3085 calldata->res.lr_res = NULL;
3086 break;
3087 case -NFS4ERR_ADMIN_REVOKED:
3088 case -NFS4ERR_DELEG_REVOKED:
3089 case -NFS4ERR_EXPIRED:
3090 case -NFS4ERR_BAD_STATEID:
3091 case -NFS4ERR_OLD_STATEID:
3092 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
3093 case -NFS4ERR_WRONG_CRED:
3094 calldata->arg.lr_args = NULL;
3095 calldata->res.lr_res = NULL;
3096 calldata->res.lr_ret = 0;
3097 rpc_restart_call_prepare(task);
3098 return;
3099 }
3100 }
3101
1da177e4
LT		 3102 /* hmm. we are done with the inode, and in the process of freeing
3103 * the state_owner. we keep this around to process errors
3104 */
1da177e4
LT		 3105 switch (task->tk_status) {
3106 case 0:
412f6c4c 3107 res_stateid = &calldata->res.stateid;
26e976a8 3108 renew_lease(server, calldata->timestamp);
412f6c4c 3109 break;
69794ad7 3110 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 3111 case -NFS4ERR_STALE_STATEID:
26d36301
TM		 3112 case -NFS4ERR_EXPIRED:
3113 nfs4_free_revoked_stateid(server,
3114 &calldata->arg.stateid,
3115 task->tk_msg.rpc_cred);
9e33bed5
TM		 3116 case -NFS4ERR_OLD_STATEID:
3117 case -NFS4ERR_BAD_STATEID:
566fcec6 3118 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 3119 &state->open_stateid)) {
566fcec6
TM		 3120 rpc_restart_call_prepare(task);
3121 goto out_release;
3122 }
dc0b027d 3123 if (calldata->arg.fmode == 0)
9e33bed5 3124 break;
1da177e4 3125 default:
8478eaa1 3126 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 3127 rpc_restart_call_prepare(task);
69794ad7
TM		 3128 goto out_release;
3129 }
1da177e4 3130 }
4a1e2feb
TM		 3131 nfs_clear_open_stateid(state, &calldata->arg.stateid,
3132 res_stateid, calldata->arg.fmode);
69794ad7 3133out_release:
72211dbe 3134 nfs_release_seqid(calldata->arg.seqid);
516a6af6 3135 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 3136 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 3137}
3138
4ce70ada 3139static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 3140{
4ce70ada 3141 struct nfs4_closedata *calldata = data;
9512135d 3142 struct nfs4_state *state = calldata->state;
7fdab069 3143 struct inode *inode = calldata->inode;
aee7af35 3144 bool is_rdonly, is_wronly, is_rdwr;
88069f77 3145 int call_close = 0;
9512135d 3146
a3ca5651 3147 dprintk("%s: begin!\n", __func__);
963d8fe5 3148 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 3149 goto out_wait;
003707c7 3150
88069f77 3151 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 3152 spin_lock(&state->owner->so_lock);
aee7af35
TM		 3153 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
3154 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
3155 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 3156 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 3157 /* Calculate the change in open mode */
cd9288ff 3158 calldata->arg.fmode = 0;
e7616923 3159 if (state->n_rdwr == 0) {
cd9288ff
TM		 3160 if (state->n_rdonly == 0)
3161 call_close |= is_rdonly;
3162 else if (is_rdonly)
3163 calldata->arg.fmode |= FMODE_READ;
3164 if (state->n_wronly == 0)
3165 call_close |= is_wronly;
3166 else if (is_wronly)
3167 calldata->arg.fmode |= FMODE_WRITE;
e547f262
TM		 3168 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
3169 call_close |= is_rdwr;
cd9288ff
TM		 3170 } else if (is_rdwr)
3171 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
3172
5cc7861e
TM		 3173 if (!nfs4_valid_open_stateid(state) ||
3174 test_bit(NFS_OPEN_STATE, &state->flags) == 0)
5d422301 3175 call_close = 0;
4cecb76f 3176 spin_unlock(&state->owner->so_lock);
88069f77
TM		 3177
3178 if (!call_close) {
963d8fe5 3179 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 3180 goto out_no_action;
9512135d 3181 }
88069f77 3182
1c5bd76d 3183 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) {
500d701f
PT		 3184 nfs_release_seqid(calldata->arg.seqid);
3185 goto out_wait;
3186 }
3187
3ecefc92 3188 if (calldata->arg.fmode == 0) {
88069f77 3189 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3ecefc92
TM		 3190
3191 /* Close-to-open cache consistency revalidation */
3192 if (!nfs4_have_delegation(inode, FMODE_READ))
3193 calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask;
3194 else
3195 calldata->arg.bitmask = NULL;
3196 }
3c13cb5b 3197
6ae37339
TM		 3198 calldata->arg.share_access =
3199 nfs4_map_atomic_open_share(NFS_SERVER(inode),
3200 calldata->arg.fmode, 0);
88069f77 3201
516a6af6 3202 nfs_fattr_init(calldata->res.fattr);
26e976a8 3203 calldata->timestamp = jiffies;
7fdab069 3204 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 3205 &calldata->arg.seq_args,
3206 &calldata->res.seq_res,
2240a9e2
TM		 3207 task) != 0)
3208 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 3209 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 3210 return;
3211out_no_action:
3212 task->tk_action = NULL;
3213out_wait:
3214 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 3215}
3216
963d8fe5 3217static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 3218 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 3219 .rpc_call_done = nfs4_close_done,
3220 .rpc_release = nfs4_free_closedata,
3221};
3222
1da177e4
LT		 3223/*
3224 * It is possible for data to be read/written from a mem-mapped file
3225 * after the sys_close call (which hits the vfs layer as a flush).
3226 * This means that we can't safely call nfsv4 close on a file until
3227 * the inode is cleared. This in turn means that we are not good
3228 * NFSv4 citizens - we do not indicate to the server to update the file's
3229 * share state even when we are done with one of the three share
3230 * stateid's in the inode.
3231 *
3232 * NOTE: Caller must be holding the sp->so_owner semaphore!
3233 */
1f7977c1 3234int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 3235{
4a35bd41 3236 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 3237 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 3238 struct nfs4_closedata *calldata;
b39e625b
TM		 3239 struct nfs4_state_owner *sp = state->owner;
3240 struct rpc_task *task;
5138fde0
TM		 3241 struct rpc_message msg = {
3242 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3243 .rpc_cred = state->owner->so_cred,
3244 };
c970aa85
TM		 3245 struct rpc_task_setup task_setup_data = {
3246 .rpc_client = server->client,
5138fde0 3247 .rpc_message = &msg,
c970aa85 3248 .callback_ops = &nfs4_close_ops,
101070ca 3249 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3250 .flags = RPC_TASK_ASYNC,
3251 };
9512135d 3252 int status = -ENOMEM;
1da177e4 3253
fa940720
WAA		 3254 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3255 &task_setup_data.rpc_client, &msg);
3256
8535b2be 3257 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 3258 if (calldata == NULL)
9512135d 3259 goto out;
a9c92d6b 3260 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 3261 calldata->inode = state->inode;
1da177e4 3262 calldata->state = state;
4a35bd41 3263 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 3264 /* Serialization for the sequence id */
63f5f796
TM		 3265 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3266 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 3267 if (IS_ERR(calldata->arg.seqid))
9512135d 3268 goto out_free_calldata;
dc0b027d 3269 calldata->arg.fmode = 0;
516a6af6 3270 calldata->res.fattr = &calldata->fattr;
c1d51931 3271 calldata->res.seqid = calldata->arg.seqid;
516a6af6 3272 calldata->res.server = server;
cf805165 3273 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
1c5bd76d
TM		 3274 calldata->lr.roc = pnfs_roc(state->inode,
3275 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred);
3276 if (calldata->lr.roc) {
3277 calldata->arg.lr_args = &calldata->lr.arg;
3278 calldata->res.lr_res = &calldata->lr.res;
3279 }
643168c2 3280 nfs_sb_active(calldata->inode->i_sb);
9512135d 3281
1174dd1f
TM		 3282 msg.rpc_argp = &calldata->arg;
3283 msg.rpc_resp = &calldata->res;
c970aa85
TM		 3284 task_setup_data.callback_data = calldata;
3285 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 3286 if (IS_ERR(task))
3287 return PTR_ERR(task);
a49c3c77
TM		 3288 status = 0;
3289 if (wait)
3290 status = rpc_wait_for_completion_task(task);
b39e625b 3291 rpc_put_task(task);
a49c3c77 3292 return status;
9512135d
TM		 3293out_free_calldata:
3294 kfree(calldata);
3295out:
b39e625b
TM		 3296 nfs4_put_open_state(state);
3297 nfs4_put_state_owner(sp);
9512135d 3298 return status;
1da177e4
LT		 3299}
3300
2b484297 3301static struct inode *
5bc2afc2
TM		 3302nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3303 int open_flags, struct iattr *attr, int *opened)
1da177e4 3304{
1da177e4 3305 struct nfs4_state *state;
aa9c2669
DQ		 3306 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3307
3308 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 3309
565277f6 3310 /* Protect against concurrent sillydeletes */
5bc2afc2 3311 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 3312
3313 nfs4_label_release_security(label);
3314
f46e0bd3
TM		 3315 if (IS_ERR(state))
3316 return ERR_CAST(state);
275bb307 3317 return state->inode;
1da177e4
LT		 3318}
3319
1185a552 3320static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 3321{
3322 if (ctx->state == NULL)
3323 return;
3324 if (is_sync)
643168c2 3325 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 3326 else
643168c2 3327 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 3328}
1da177e4 3329
b944dba3
TM		 3330#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3331#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 3332#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 3333
1da177e4
LT		 3334static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3335{
8c61282f 3336 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 3337 struct nfs4_server_caps_arg args = {
3338 .fhandle = fhandle,
8c61282f 3339 .bitmask = bitmask,
43652ad5 3340 };
1da177e4
LT		 3341 struct nfs4_server_caps_res res = {};
3342 struct rpc_message msg = {
3343 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 3344 .rpc_argp = &args,
1da177e4
LT		 3345 .rpc_resp = &res,
3346 };
3347 int status;
3348
8c61282f
KM		 3349 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3350 FATTR4_WORD0_FH_EXPIRE_TYPE |
3351 FATTR4_WORD0_LINK_SUPPORT |
3352 FATTR4_WORD0_SYMLINK_SUPPORT |
3353 FATTR4_WORD0_ACLSUPPORT;
3354 if (minorversion)
3355 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3356
7c513058 3357 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3358 if (status == 0) {
b944dba3 3359 /* Sanity check the server answers */
8c61282f 3360 switch (minorversion) {
b944dba3
TM		 3361 case 0:
3362 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3363 res.attr_bitmask[2] = 0;
3364 break;
3365 case 1:
3366 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3367 break;
3368 case 2:
3369 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3370 }
1da177e4 3371 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 3372 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3373 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3374 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3375 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 3376 NFS_CAP_CTIME|NFS_CAP_MTIME|
3377 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 3378 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3379 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 3380 server->caps |= NFS_CAP_ACLS;
3381 if (res.has_links != 0)
3382 server->caps |= NFS_CAP_HARDLINKS;
3383 if (res.has_symlinks != 0)
3384 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 3385 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3386 server->caps |= NFS_CAP_FILEID;
3387 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3388 server->caps |= NFS_CAP_MODE;
3389 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3390 server->caps |= NFS_CAP_NLINK;
3391 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3392 server->caps |= NFS_CAP_OWNER;
3393 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3394 server->caps |= NFS_CAP_OWNER_GROUP;
3395 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3396 server->caps |= NFS_CAP_ATIME;
3397 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3398 server->caps |= NFS_CAP_CTIME;
3399 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3400 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 3401#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3402 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3403 server->caps |= NFS_CAP_SECURITY_LABEL;
3404#endif
3405 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3406 sizeof(server->attr_bitmask));
b944dba3 3407 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 3408
a65318bf
TM		 3409 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3410 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3411 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 3412 server->cache_consistency_bitmask[2] = 0;
8c61282f
KM		 3413 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3414 sizeof(server->exclcreat_bitmask));
1da177e4 3415 server->acl_bitmask = res.acl_bitmask;
264e6351 3416 server->fh_expire_type = res.fh_expire_type;
1da177e4 3417 }
cccef3b9 3418
1da177e4
LT		 3419 return status;
3420}
3421
55a97593 3422int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 3423{
3424 struct nfs4_exception exception = { };
3425 int err;
3426 do {
3427 err = nfs4_handle_exception(server,
3428 _nfs4_server_capabilities(server, fhandle),
3429 &exception);
3430 } while (exception.retry);
3431 return err;
3432}
3433
3434static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3435 struct nfs_fsinfo *info)
3436{
aa9c2669 3437 u32 bitmask[3];
1da177e4 3438 struct nfs4_lookup_root_arg args = {
aa9c2669 3439 .bitmask = bitmask,
1da177e4
LT		 3440 };
3441 struct nfs4_lookup_res res = {
3442 .server = server,
0e574af1 3443 .fattr = info->fattr,
1da177e4
LT		 3444 .fh = fhandle,
3445 };
3446 struct rpc_message msg = {
3447 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3448 .rpc_argp = &args,
3449 .rpc_resp = &res,
3450 };
008f55d0 3451
aa9c2669
DQ		 3452 bitmask[0] = nfs4_fattr_bitmap[0];
3453 bitmask[1] = nfs4_fattr_bitmap[1];
3454 /*
3455 * Process the label in the upcoming getfattr
3456 */
3457 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3458
0e574af1 3459 nfs_fattr_init(info->fattr);
7c513058 3460 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3461}
3462
3463static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3464 struct nfs_fsinfo *info)
3465{
3466 struct nfs4_exception exception = { };
3467 int err;
3468 do {
fb8a5ba8 3469 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3470 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3471 switch (err) {
3472 case 0:
3473 case -NFS4ERR_WRONGSEC:
05e9cfb4 3474 goto out;
fb8a5ba8
BS		 3475 default:
3476 err = nfs4_handle_exception(server, err, &exception);
3477 }
1da177e4 3478 } while (exception.retry);
05e9cfb4 3479out:
1da177e4
LT		 3480 return err;
3481}
3482
8f70e95f
BS		 3483static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3484 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3485{
c2190661
TM		 3486 struct rpc_auth_create_args auth_args = {
3487 .pseudoflavor = flavor,
3488 };
8f70e95f
BS		 3489 struct rpc_auth *auth;
3490 int ret;
3491
c2190661 3492 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3493 if (IS_ERR(auth)) {
75bc8821 3494 ret = -EACCES;
8f70e95f
BS		 3495 goto out;
3496 }
3497 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3498out:
3499 return ret;
3500}
3501
9a744ba3
CL		 3502/*
3503 * Retry pseudoroot lookup with various security flavors. We do this when:
3504 *
3505 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3506 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3507 *
3508 * Returns zero on success, or a negative NFS4ERR value, or a
3509 * negative errno value.
3510 */
801a16dc 3511static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3512 struct nfs_fsinfo *info)
1da177e4 3513{
9a744ba3
CL		 3514 /* Per 3530bis 15.33.5 */
3515 static const rpc_authflavor_t flav_array[] = {
3516 RPC_AUTH_GSS_KRB5P,
3517 RPC_AUTH_GSS_KRB5I,
3518 RPC_AUTH_GSS_KRB5,
c4eafe11 3519 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3520 RPC_AUTH_NULL,
3521 };
3522 int status = -EPERM;
3523 size_t i;
6a1a1e34 3524
4d4b69dd
WAA		 3525 if (server->auth_info.flavor_len > 0) {
3526 /* try each flavor specified by user */
3527 for (i = 0; i < server->auth_info.flavor_len; i++) {
3528 status = nfs4_lookup_root_sec(server, fhandle, info,
3529 server->auth_info.flavors[i]);
3530 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3531 continue;
3532 break;
3533 }
3534 } else {
3535 /* no flavors specified by user, try default list */
3536 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3537 status = nfs4_lookup_root_sec(server, fhandle, info,
3538 flav_array[i]);
3539 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3540 continue;
3541 break;
3542 }
8f70e95f 3543 }
9a744ba3 3544
fb8a5ba8
BS		 3545 /*
3546 * -EACCESS could mean that the user doesn't have correct permissions
3547 * to access the mount. It could also mean that we tried to mount
3548 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3549 * existing mount programs don't handle -EACCES very well so it should
3550 * be mapped to -EPERM instead.
3551 */
3552 if (status == -EACCES)
3553 status = -EPERM;
801a16dc
BS		 3554 return status;
3555}
3556
2ed4b95b
CL		 3557/**
3558 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3559 * @server: initialized nfs_server handle
3560 * @fhandle: we fill in the pseudo-fs root file handle
3561 * @info: we fill in an FSINFO struct
5e6b1990 3562 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3563 *
3564 * Returns zero on success, or a negative errno.
801a16dc 3565 */
3028eb2b 3566int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3567 struct nfs_fsinfo *info,
3568 bool auth_probe)
801a16dc 3569{
c7757074 3570 int status = 0;
2ed4b95b 3571
c7757074 3572 if (!auth_probe)
5e6b1990 3573 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3574
3575 if (auth_probe || status == NFS4ERR_WRONGSEC)
698c937b
TM		 3576 status = server->nfs_client->cl_mvops->find_root_sec(server,
3577 fhandle, info);
2ed4b95b 3578
1da177e4
LT		 3579 if (status == 0)
3580 status = nfs4_server_capabilities(server, fhandle);
3581 if (status == 0)
3582 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3583
c12e87f4 3584 return nfs4_map_errors(status);
1da177e4
LT		 3585}
3586
bae36241
BS		 3587static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3588 struct nfs_fsinfo *info)
3589{
3590 int error;
3591 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3592 struct nfs4_label *label = NULL;
bae36241
BS		 3593
3594 error = nfs4_server_capabilities(server, mntfh);
3595 if (error < 0) {
3596 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3597 return error;
3598 }
3599
14c43f76
DQ		 3600 label = nfs4_label_alloc(server, GFP_KERNEL);
3601 if (IS_ERR(label))
3602 return PTR_ERR(label);
3603
1775fd3e 3604 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3605 if (error < 0) {
3606 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3607 goto err_free_label;
bae36241
BS		 3608 }
3609
3610 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3611 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3612 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3613
14c43f76
DQ		 3614err_free_label:
3615 nfs4_label_free(label);
3616
bae36241
BS		 3617 return error;
3618}
3619
6b97fd3d
MN		 3620/*
3621 * Get locations and (maybe) other attributes of a referral.
3622 * Note that we'll actually follow the referral later when
3623 * we detect fsid mismatch in inode revalidation
3624 */
f05d147f
BS		 3625static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3626 const struct qstr *name, struct nfs_fattr *fattr,
3627 struct nfs_fh *fhandle)
6b97fd3d
MN		 3628{
3629 int status = -ENOMEM;
3630 struct page *page = NULL;
3631 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3632
3633 page = alloc_page(GFP_KERNEL);
3634 if (page == NULL)
3635 goto out;
3636 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3637 if (locations == NULL)
3638 goto out;
3639
f05d147f 3640 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3641 if (status != 0)
3642 goto out;
519ae255
CL		 3643
3644 /*
3645 * If the fsid didn't change, this is a migration event, not a
3646 * referral. Cause us to drop into the exception handler, which
3647 * will kick off migration recovery.
3648 */
6b97fd3d 3649 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3650 dprintk("%s: server did not return a different fsid for"
3651 " a referral at %s\n", __func__, name->name);
519ae255 3652 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3653 goto out;
3654 }
533eb461
AA		 3655 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3656 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3657
533eb461 3658 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3659 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3660 memset(fhandle, 0, sizeof(struct nfs_fh));
3661out:
3662 if (page)
3663 __free_page(page);
5d7ca35a 3664 kfree(locations);
6b97fd3d
MN		 3665 return status;
3666}
3667
1775fd3e
DQ		 3668static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3669 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3670{
3671 struct nfs4_getattr_arg args = {
3672 .fh = fhandle,
3673 .bitmask = server->attr_bitmask,
3674 };
3675 struct nfs4_getattr_res res = {
3676 .fattr = fattr,
1775fd3e 3677 .label = label,
1da177e4
LT		 3678 .server = server,
3679 };
3680 struct rpc_message msg = {
3681 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3682 .rpc_argp = &args,
3683 .rpc_resp = &res,
3684 };
aa9c2669
DQ		 3685
3686 args.bitmask = nfs4_bitmask(server, label);
3687
0e574af1 3688 nfs_fattr_init(fattr);
7c513058 3689 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3690}
3691
1775fd3e
DQ		 3692static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3693 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3694{
3695 struct nfs4_exception exception = { };
3696 int err;
3697 do {
b5f875a9
TM		 3698 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3699 trace_nfs4_getattr(server, fhandle, fattr, err);
3700 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3701 &exception);
3702 } while (exception.retry);
3703 return err;
3704}
3705
3706/*
3707 * The file is not closed if it is opened due to the a request to change
3708 * the size of the file. The open call will not be needed once the
3709 * VFS layer lookup-intents are implemented.
3710 *
3711 * Close is called when the inode is destroyed.
3712 * If we haven't opened the file for O_WRONLY, we
3713 * need to in the size_change case to obtain a stateid.
3714 *
3715 * Got race?
3716 * Because OPEN is always done by name in nfsv4, it is
3717 * possible that we opened a different file by the same
3718 * name. We can recognize this race condition, but we
3719 * can't do anything about it besides returning an error.
3720 *
3721 * This will be fixed with VFS changes (lookup-intent).
3722 */
3723static int
3724nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3725 struct iattr *sattr)
3726{
2b0143b5 3727 struct inode *inode = d_inode(dentry);
659bfcd6 3728 struct rpc_cred *cred = NULL;
29b59f94 3729 struct nfs_open_context *ctx = NULL;
14c43f76 3730 struct nfs4_label *label = NULL;
1da177e4
LT		 3731 int status;
3732
88ac815c
PT		 3733 if (pnfs_ld_layoutret_on_setattr(inode) &&
3734 sattr->ia_valid & ATTR_SIZE &&
3735 sattr->ia_size < i_size_read(inode))
24028672 3736 pnfs_commit_and_return_layout(inode);
8a1636c4 3737
0e574af1 3738 nfs_fattr_init(fattr);
1da177e4 3739
2669940d
AA		 3740 /* Deal with open(O_TRUNC) */
3741 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3742 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3743
3744 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3745 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3746 return 0;
3747
d530838b 3748 /* Search for an existing open(O_WRITE) file */
659bfcd6 3749 if (sattr->ia_valid & ATTR_FILE) {
659bfcd6
TM		 3750
3751 ctx = nfs_file_open_context(sattr->ia_file);
29b59f94 3752 if (ctx)
504e5189 3753 cred = ctx->cred;
659bfcd6 3754 }
08e9eac4 3755
14c43f76
DQ		 3756 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3757 if (IS_ERR(label))
3758 return PTR_ERR(label);
3759
29b59f94 3760 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label);
aa9c2669 3761 if (status == 0) {
f044636d 3762 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3763 nfs_setsecurity(inode, fattr, label);
3764 }
14c43f76 3765 nfs4_label_free(label);
1da177e4
LT		 3766 return status;
3767}
3768
0c2e53f1
TM		 3769static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3770 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3771 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3772{
0c2e53f1 3773 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3774 int status;
3775 struct nfs4_lookup_arg args = {
3776 .bitmask = server->attr_bitmask,
0c2e53f1 3777 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3778 .name = name,
3779 };
3780 struct nfs4_lookup_res res = {
3781 .server = server,
3782 .fattr = fattr,
aa9c2669 3783 .label = label,
2b3de441
DH		 3784 .fh = fhandle,
3785 };
3786 struct rpc_message msg = {
3787 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3788 .rpc_argp = &args,
3789 .rpc_resp = &res,
3790 };
3791
aa9c2669
DQ		 3792 args.bitmask = nfs4_bitmask(server, label);
3793
2b3de441
DH		 3794 nfs_fattr_init(fattr);
3795
1da177e4 3796 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3797 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3798 dprintk("NFS reply lookup: %d\n", status);
3799 return status;
3800}
3801
72de53ec 3802static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3803{
7ebb9315 3804 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3805 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3806 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3807 fattr->nlink = 2;
3808}
3809
72de53ec 3810static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
beffb8fe 3811 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3812 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3813{
3814 struct nfs4_exception exception = { };
72de53ec 3815 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3816 int err;
3817 do {
1775fd3e 3818 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3819 trace_nfs4_lookup(dir, name, err);
72de53ec 3820 switch (err) {
08ef7bd3 3821 case -NFS4ERR_BADNAME:
72de53ec
BS		 3822 err = -ENOENT;
3823 goto out;
0c2e53f1 3824 case -NFS4ERR_MOVED:
f05d147f 3825 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3826 if (err == -NFS4ERR_MOVED)
3827 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3828 goto out;
0c2e53f1 3829 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3830 err = -EPERM;
3831 if (client != *clnt)
3832 goto out;
66b06860 3833 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3834 if (IS_ERR(client))
3835 return PTR_ERR(client);
3836
3837 exception.retry = 1;
3838 break;
3839 default:
3840 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3841 }
1da177e4 3842 } while (exception.retry);
72de53ec
BS		 3843
3844out:
3845 if (err == 0)
3846 *clnt = client;
3847 else if (client != *clnt)
3848 rpc_shutdown_client(client);
3849
1da177e4
LT		 3850 return err;
3851}
3852
beffb8fe 3853static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1775fd3e
DQ		 3854 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3855 struct nfs4_label *label)
72de53ec
BS		 3856{
3857 int status;
3858 struct rpc_clnt *client = NFS_CLIENT(dir);
3859
1775fd3e 3860 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3861 if (client != NFS_CLIENT(dir)) {
3862 rpc_shutdown_client(client);
3863 nfs_fixup_secinfo_attributes(fattr);
3864 }
3865 return status;
3866}
3867
f05d147f 3868struct rpc_clnt *
beffb8fe 3869nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name,
f05d147f
BS		 3870 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3871{
b72888cb 3872 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3873 int status;
f05d147f 3874
1775fd3e 3875 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3876 if (status < 0)
f05d147f 3877 return ERR_PTR(status);
b72888cb 3878 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3879}
3880
1da177e4
LT		 3881static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3882{
76b32999 3883 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3884 struct nfs4_accessargs args = {
3885 .fh = NFS_FH(inode),
a4980e78 3886 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3887 };
3888 struct nfs4_accessres res = {
3889 .server = server,
1da177e4 3890 };
1da177e4
LT		 3891 struct rpc_message msg = {
3892 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3893 .rpc_argp = &args,
3894 .rpc_resp = &res,
3895 .rpc_cred = entry->cred,
3896 };
3897 int mode = entry->mask;
aa9c2669 3898 int status = 0;
1da177e4
LT		 3899
3900 /*
3901 * Determine which access bits we want to ask for...
3902 */
3903 if (mode & MAY_READ)
3904 args.access |= NFS4_ACCESS_READ;
3905 if (S_ISDIR(inode->i_mode)) {
3906 if (mode & MAY_WRITE)
3907 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3908 if (mode & MAY_EXEC)
3909 args.access |= NFS4_ACCESS_LOOKUP;
3910 } else {
3911 if (mode & MAY_WRITE)
3912 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3913 if (mode & MAY_EXEC)
3914 args.access |= NFS4_ACCESS_EXECUTE;
3915 }
c407d41a
TM		 3916
3917 res.fattr = nfs_alloc_fattr();
3918 if (res.fattr == NULL)
3919 return -ENOMEM;
3920
7c513058 3921 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3922 if (!status) {
6168f62c 3923 nfs_access_set_mask(entry, res.access);
c407d41a 3924 nfs_refresh_inode(inode, res.fattr);
1da177e4 3925 }
c407d41a 3926 nfs_free_fattr(res.fattr);
1da177e4
LT		 3927 return status;
3928}
3929
3930static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3931{
3932 struct nfs4_exception exception = { };
3933 int err;
3934 do {
c1578b76
TM		 3935 err = _nfs4_proc_access(inode, entry);
3936 trace_nfs4_access(inode, err);
3937 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3938 &exception);
3939 } while (exception.retry);
3940 return err;
3941}
3942
3943/*
3944 * TODO: For the time being, we don't try to get any attributes
3945 * along with any of the zero-copy operations READ, READDIR,
3946 * READLINK, WRITE.
3947 *
3948 * In the case of the first three, we want to put the GETATTR
3949 * after the read-type operation -- this is because it is hard
3950 * to predict the length of a GETATTR response in v4, and thus
3951 * align the READ data correctly. This means that the GETATTR
3952 * may end up partially falling into the page cache, and we should
3953 * shift it into the 'tail' of the xdr_buf before processing.
3954 * To do this efficiently, we need to know the total length
3955 * of data received, which doesn't seem to be available outside
3956 * of the RPC layer.
3957 *
3958 * In the case of WRITE, we also want to put the GETATTR after
3959 * the operation -- in this case because we want to make sure
140150db 3960 * we get the post-operation mtime and size.
1da177e4
LT		 3961 *
3962 * Both of these changes to the XDR layer would in fact be quite
3963 * minor, but I decided to leave them for a subsequent patch.
3964 */
3965static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3966 unsigned int pgbase, unsigned int pglen)
3967{
3968 struct nfs4_readlink args = {
3969 .fh = NFS_FH(inode),
3970 .pgbase = pgbase,
3971 .pglen = pglen,
3972 .pages = &page,
3973 };
f50c7000 3974 struct nfs4_readlink_res res;
1da177e4
LT		 3975 struct rpc_message msg = {
3976 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3977 .rpc_argp = &args,
f50c7000 3978 .rpc_resp = &res,
1da177e4
LT		 3979 };
3980
7c513058 3981 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3982}
3983
3984static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3985 unsigned int pgbase, unsigned int pglen)
3986{
3987 struct nfs4_exception exception = { };
3988 int err;
3989 do {
c1578b76
TM		 3990 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3991 trace_nfs4_readlink(inode, err);
3992 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3993 &exception);
3994 } while (exception.retry);
3995 return err;
3996}
3997
1da177e4 3998/*
8867fe58 3999 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 4000 */
1da177e4
LT		 4001static int
4002nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 4003 int flags)
1da177e4 4004{
aa9c2669 4005 struct nfs4_label l, *ilabel = NULL;
8867fe58 4006 struct nfs_open_context *ctx;
1da177e4 4007 struct nfs4_state *state;
1da177e4
LT		 4008 int status = 0;
4009
532d4def 4010 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL);
8867fe58
MS		 4011 if (IS_ERR(ctx))
4012 return PTR_ERR(ctx);
4013
aa9c2669
DQ		 4014 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
4015
a8a5da99 4016 sattr->ia_mode &= ~current_umask();
c5c3fb5f 4017 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 4018 if (IS_ERR(state)) {
4019 status = PTR_ERR(state);
c0204fd2 4020 goto out;
1da177e4 4021 }
1da177e4 4022out:
aa9c2669 4023 nfs4_label_release_security(ilabel);
8867fe58 4024 put_nfs_open_context(ctx);
1da177e4
LT		 4025 return status;
4026}
4027
beffb8fe 4028static int _nfs4_proc_remove(struct inode *dir, const struct qstr *name)
1da177e4 4029{
16e42959 4030 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 4031 struct nfs_removeargs args = {
1da177e4 4032 .fh = NFS_FH(dir),
26fe5750 4033 .name = *name,
16e42959 4034 };
4fdc17b2 4035 struct nfs_removeres res = {
16e42959 4036 .server = server,
1da177e4 4037 };
1da177e4 4038 struct rpc_message msg = {
4fdc17b2
TM		 4039 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
4040 .rpc_argp = &args,
4041 .rpc_resp = &res,
1da177e4 4042 };
778d2817 4043 int status;
1da177e4 4044
7c513058 4045 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 4046 if (status == 0)
16e42959 4047 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 4048 return status;
4049}
4050
beffb8fe 4051static int nfs4_proc_remove(struct inode *dir, const struct qstr *name)
1da177e4
LT		 4052{
4053 struct nfs4_exception exception = { };
4054 int err;
4055 do {
078ea3df
TM		 4056 err = _nfs4_proc_remove(dir, name);
4057 trace_nfs4_remove(dir, name, err);
4058 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4059 &exception);
4060 } while (exception.retry);
4061 return err;
4062}
4063
e4eff1a6 4064static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 4065{
e4eff1a6
TM		 4066 struct nfs_server *server = NFS_SERVER(dir);
4067 struct nfs_removeargs *args = msg->rpc_argp;
4068 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 4069
e4eff1a6 4070 res->server = server;
1da177e4 4071 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 4072 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 4073
4074 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 4075}
4076
34e137cc
BS		 4077static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
4078{
884be175 4079 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb),
d9afbd1b
TM		 4080 &data->args.seq_args,
4081 &data->res.seq_res,
4082 task);
1da177e4
LT		 4083}
4084
e4eff1a6 4085static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 4086{
078ea3df
TM		 4087 struct nfs_unlinkdata *data = task->tk_calldata;
4088 struct nfs_removeres *res = &data->res;
e4eff1a6 4089
14516c3a
TM		 4090 if (!nfs4_sequence_done(task, &res->seq_res))
4091 return 0;
8478eaa1
N		 4092 if (nfs4_async_handle_error(task, res->server, NULL,
4093 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 4094 return 0;
4095 update_changeattr(dir, &res->cinfo);
e4eff1a6 4096 return 1;
1da177e4
LT		 4097}
4098
d3d4152a
JL		 4099static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
4100{
4101 struct nfs_server *server = NFS_SERVER(dir);
4102 struct nfs_renameargs *arg = msg->rpc_argp;
4103 struct nfs_renameres *res = msg->rpc_resp;
4104
4105 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 4106 res->server = server;
a9c92d6b 4107 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 4108}
4109
c6bfa1a1
BS		 4110static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
4111{
d9afbd1b
TM		 4112 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
4113 &data->args.seq_args,
4114 &data->res.seq_res,
4115 task);
d3d4152a
JL		 4116}
4117
4118static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
4119 struct inode *new_dir)
4120{
fbc6f7c2
TM		 4121 struct nfs_renamedata *data = task->tk_calldata;
4122 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 4123
4124 if (!nfs4_sequence_done(task, &res->seq_res))
4125 return 0;
8478eaa1 4126 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 4127 return 0;
4128
4129 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 4130 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 4131 return 1;
4132}
4133
beffb8fe 4134static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4 4135{
91ba2eee 4136 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 4137 struct nfs4_link_arg arg = {
4138 .fh = NFS_FH(inode),
4139 .dir_fh = NFS_FH(dir),
4140 .name = name,
91ba2eee
TM		 4141 .bitmask = server->attr_bitmask,
4142 };
91ba2eee
TM		 4143 struct nfs4_link_res res = {
4144 .server = server,
1775fd3e 4145 .label = NULL,
1da177e4 4146 };
1da177e4
LT		 4147 struct rpc_message msg = {
4148 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
4149 .rpc_argp = &arg,
91ba2eee 4150 .rpc_resp = &res,
1da177e4 4151 };
136f2627
TM		 4152 int status = -ENOMEM;
4153
4154 res.fattr = nfs_alloc_fattr();
778d2817 4155 if (res.fattr == NULL)
136f2627 4156 goto out;
1da177e4 4157
14c43f76
DQ		 4158 res.label = nfs4_label_alloc(server, GFP_KERNEL);
4159 if (IS_ERR(res.label)) {
4160 status = PTR_ERR(res.label);
4161 goto out;
4162 }
aa9c2669 4163 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 4164
7c513058 4165 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 4166 if (!status) {
4167 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 4168 status = nfs_post_op_update_inode(inode, res.fattr);
4169 if (!status)
4170 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 4171 }
14c43f76
DQ		 4172
4173
4174 nfs4_label_free(res.label);
4175
136f2627 4176out:
136f2627 4177 nfs_free_fattr(res.fattr);
1da177e4
LT		 4178 return status;
4179}
4180
beffb8fe 4181static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4
LT		 4182{
4183 struct nfs4_exception exception = { };
4184 int err;
4185 do {
4186 err = nfs4_handle_exception(NFS_SERVER(inode),
4187 _nfs4_proc_link(inode, dir, name),
4188 &exception);
4189 } while (exception.retry);
4190 return err;
4191}
4192
57dc9a57
TM		 4193struct nfs4_createdata {
4194 struct rpc_message msg;
4195 struct nfs4_create_arg arg;
4196 struct nfs4_create_res res;
4197 struct nfs_fh fh;
4198 struct nfs_fattr fattr;
1775fd3e 4199 struct nfs4_label *label;
57dc9a57
TM		 4200};
4201
4202static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
beffb8fe 4203 const struct qstr *name, struct iattr *sattr, u32 ftype)
57dc9a57
TM		 4204{
4205 struct nfs4_createdata *data;
4206
4207 data = kzalloc(sizeof(*data), GFP_KERNEL);
4208 if (data != NULL) {
4209 struct nfs_server *server = NFS_SERVER(dir);
4210
14c43f76
DQ		 4211 data->label = nfs4_label_alloc(server, GFP_KERNEL);
4212 if (IS_ERR(data->label))
4213 goto out_free;
4214
57dc9a57
TM		 4215 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
4216 data->msg.rpc_argp = &data->arg;
4217 data->msg.rpc_resp = &data->res;
4218 data->arg.dir_fh = NFS_FH(dir);
4219 data->arg.server = server;
4220 data->arg.name = name;
4221 data->arg.attrs = sattr;
4222 data->arg.ftype = ftype;
aa9c2669 4223 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 4224 data->res.server = server;
4225 data->res.fh = &data->fh;
4226 data->res.fattr = &data->fattr;
1775fd3e 4227 data->res.label = data->label;
57dc9a57 4228 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 4229 }
4230 return data;
14c43f76
DQ		 4231out_free:
4232 kfree(data);
4233 return NULL;
57dc9a57
TM		 4234}
4235
4236static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
4237{
7c513058 4238 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 4239 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 4240 if (status == 0) {
4241 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 4242 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 4243 }
4244 return status;
4245}
4246
4247static void nfs4_free_createdata(struct nfs4_createdata *data)
4248{
14c43f76 4249 nfs4_label_free(data->label);
57dc9a57
TM		 4250 kfree(data);
4251}
4252
4f390c15 4253static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 4254 struct page *page, unsigned int len, struct iattr *sattr,
4255 struct nfs4_label *label)
1da177e4 4256{
57dc9a57
TM		 4257 struct nfs4_createdata *data;
4258 int status = -ENAMETOOLONG;
1da177e4 4259
94a6d753 4260 if (len > NFS4_MAXPATHLEN)
57dc9a57 4261 goto out;
4f390c15 4262
57dc9a57
TM		 4263 status = -ENOMEM;
4264 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
4265 if (data == NULL)
4266 goto out;
4267
4268 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
4269 data->arg.u.symlink.pages = &page;
4270 data->arg.u.symlink.len = len;
1775fd3e 4271 data->arg.label = label;
1da177e4 4272
57dc9a57
TM		 4273 status = nfs4_do_create(dir, dentry, data);
4274
4275 nfs4_free_createdata(data);
4276out:
1da177e4
LT		 4277 return status;
4278}
4279
4f390c15 4280static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 4281 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 4282{
4283 struct nfs4_exception exception = { };
aa9c2669 4284 struct nfs4_label l, *label = NULL;
1da177e4 4285 int err;
aa9c2669
DQ		 4286
4287 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4288
1da177e4 4289 do {
078ea3df
TM		 4290 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4291 trace_nfs4_symlink(dir, &dentry->d_name, err);
4292 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4293 &exception);
4294 } while (exception.retry);
aa9c2669
DQ		 4295
4296 nfs4_label_release_security(label);
1da177e4
LT		 4297 return err;
4298}
4299
4300static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 4301 struct iattr *sattr, struct nfs4_label *label)
1da177e4 4302{
57dc9a57
TM		 4303 struct nfs4_createdata *data;
4304 int status = -ENOMEM;
1da177e4 4305
57dc9a57
TM		 4306 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4307 if (data == NULL)
4308 goto out;
4309
1775fd3e 4310 data->arg.label = label;
57dc9a57
TM		 4311 status = nfs4_do_create(dir, dentry, data);
4312
4313 nfs4_free_createdata(data);
4314out:
1da177e4
LT		 4315 return status;
4316}
4317
4318static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4319 struct iattr *sattr)
4320{
4321 struct nfs4_exception exception = { };
aa9c2669 4322 struct nfs4_label l, *label = NULL;
1da177e4 4323 int err;
a8a5da99 4324
aa9c2669
DQ		 4325 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4326
a8a5da99 4327 sattr->ia_mode &= ~current_umask();
1da177e4 4328 do {
078ea3df
TM		 4329 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4330 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4331 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4332 &exception);
4333 } while (exception.retry);
aa9c2669
DQ		 4334 nfs4_label_release_security(label);
4335
1da177e4
LT		 4336 return err;
4337}
4338
4339static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4340 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4 4341{
2b0143b5 4342 struct inode *dir = d_inode(dentry);
1da177e4
LT		 4343 struct nfs4_readdir_arg args = {
4344 .fh = NFS_FH(dir),
56e4ebf8 4345 .pages = pages,
1da177e4
LT		 4346 .pgbase = 0,
4347 .count = count,
2b0143b5 4348 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 4349 .plus = plus,
1da177e4
LT		 4350 };
4351 struct nfs4_readdir_res res;
4352 struct rpc_message msg = {
4353 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4354 .rpc_argp = &args,
4355 .rpc_resp = &res,
4356 .rpc_cred = cred,
4357 };
4358 int status;
4359
6de1472f
AV		 4360 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4361 dentry,
eadf4598 4362 (unsigned long long)cookie);
c3f52af3 4363 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 4364 res.pgbase = args.pgbase;
7c513058 4365 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 4366 if (status >= 0) {
c3f52af3 4367 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 4368 status += args.pgbase;
4369 }
c4812998
TM		 4370
4371 nfs_invalidate_atime(dir);
4372
3110ff80 4373 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 4374 return status;
4375}
4376
4377static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4378 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 4379{
4380 struct nfs4_exception exception = { };
4381 int err;
4382 do {
c1578b76
TM		 4383 err = _nfs4_proc_readdir(dentry, cred, cookie,
4384 pages, count, plus);
2b0143b5
DH		 4385 trace_nfs4_readdir(d_inode(dentry), err);
4386 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 4387 &exception);
4388 } while (exception.retry);
4389 return err;
4390}
4391
4392static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 4393 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 4394{
57dc9a57
TM		 4395 struct nfs4_createdata *data;
4396 int mode = sattr->ia_mode;
4397 int status = -ENOMEM;
1da177e4 4398
57dc9a57
TM		 4399 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4400 if (data == NULL)
4401 goto out;
4402
1da177e4 4403 if (S_ISFIFO(mode))
57dc9a57 4404 data->arg.ftype = NF4FIFO;
1da177e4 4405 else if (S_ISBLK(mode)) {
57dc9a57
TM		 4406 data->arg.ftype = NF4BLK;
4407 data->arg.u.device.specdata1 = MAJOR(rdev);
4408 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 4409 }
4410 else if (S_ISCHR(mode)) {
57dc9a57
TM		 4411 data->arg.ftype = NF4CHR;
4412 data->arg.u.device.specdata1 = MAJOR(rdev);
4413 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 4414 } else if (!S_ISSOCK(mode)) {
4415 status = -EINVAL;
4416 goto out_free;
1da177e4 4417 }
1775fd3e 4418
aa9c2669 4419 data->arg.label = label;
57dc9a57 4420 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 4421out_free:
57dc9a57
TM		 4422 nfs4_free_createdata(data);
4423out:
1da177e4
LT		 4424 return status;
4425}
4426
4427static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4428 struct iattr *sattr, dev_t rdev)
4429{
4430 struct nfs4_exception exception = { };
aa9c2669 4431 struct nfs4_label l, *label = NULL;
1da177e4 4432 int err;
a8a5da99 4433
aa9c2669
DQ		 4434 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4435
a8a5da99 4436 sattr->ia_mode &= ~current_umask();
1da177e4 4437 do {
078ea3df
TM		 4438 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4439 trace_nfs4_mknod(dir, &dentry->d_name, err);
4440 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4441 &exception);
4442 } while (exception.retry);
aa9c2669
DQ		 4443
4444 nfs4_label_release_security(label);
4445
1da177e4
LT		 4446 return err;
4447}
4448
4449static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4450 struct nfs_fsstat *fsstat)
4451{
4452 struct nfs4_statfs_arg args = {
4453 .fh = fhandle,
4454 .bitmask = server->attr_bitmask,
4455 };
24ad148a
BH		 4456 struct nfs4_statfs_res res = {
4457 .fsstat = fsstat,
4458 };
1da177e4
LT		 4459 struct rpc_message msg = {
4460 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4461 .rpc_argp = &args,
24ad148a 4462 .rpc_resp = &res,
1da177e4
LT		 4463 };
4464
0e574af1 4465 nfs_fattr_init(fsstat->fattr);
7c513058 4466 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4467}
4468
4469static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4470{
4471 struct nfs4_exception exception = { };
4472 int err;
4473 do {
4474 err = nfs4_handle_exception(server,
4475 _nfs4_proc_statfs(server, fhandle, fsstat),
4476 &exception);
4477 } while (exception.retry);
4478 return err;
4479}
4480
4481static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4482 struct nfs_fsinfo *fsinfo)
4483{
4484 struct nfs4_fsinfo_arg args = {
4485 .fh = fhandle,
4486 .bitmask = server->attr_bitmask,
4487 };
3dda5e43
BH		 4488 struct nfs4_fsinfo_res res = {
4489 .fsinfo = fsinfo,
4490 };
1da177e4
LT		 4491 struct rpc_message msg = {
4492 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4493 .rpc_argp = &args,
3dda5e43 4494 .rpc_resp = &res,
1da177e4
LT		 4495 };
4496
7c513058 4497 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4498}
4499
4500static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4501{
4502 struct nfs4_exception exception = { };
83ca7f5a 4503 unsigned long now = jiffies;
1da177e4
LT		 4504 int err;
4505
4506 do {
83ca7f5a 4507 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4508 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a 4509 if (err == 0) {
fb10fb67
TM		 4510 nfs4_set_lease_period(server->nfs_client,
4511 fsinfo->lease_time * HZ,
4512 now);
83ca7f5a
CL		 4513 break;
4514 }
4515 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4516 } while (exception.retry);
4517 return err;
4518}
4519
4520static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4521{
e38eb650
BS		 4522 int error;
4523
0e574af1 4524 nfs_fattr_init(fsinfo->fattr);
e38eb650 4525 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4526 if (error == 0) {
4527 /* block layout checks this! */
4528 server->pnfs_blksize = fsinfo->blksize;
ca440c38 4529 set_pnfs_layoutdriver(server, fhandle, fsinfo);
dc182549 4530 }
e38eb650
BS		 4531
4532 return error;
1da177e4
LT		 4533}
4534
4535static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4536 struct nfs_pathconf *pathconf)
4537{
4538 struct nfs4_pathconf_arg args = {
4539 .fh = fhandle,
4540 .bitmask = server->attr_bitmask,
4541 };
d45b2989
BH		 4542 struct nfs4_pathconf_res res = {
4543 .pathconf = pathconf,
4544 };
1da177e4
LT		 4545 struct rpc_message msg = {
4546 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4547 .rpc_argp = &args,
d45b2989 4548 .rpc_resp = &res,
1da177e4
LT		 4549 };
4550
4551 /* None of the pathconf attributes are mandatory to implement */
4552 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4553 memset(pathconf, 0, sizeof(*pathconf));
4554 return 0;
4555 }
4556
0e574af1 4557 nfs_fattr_init(pathconf->fattr);
7c513058 4558 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4559}
4560
4561static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4562 struct nfs_pathconf *pathconf)
4563{
4564 struct nfs4_exception exception = { };
4565 int err;
4566
4567 do {
4568 err = nfs4_handle_exception(server,
4569 _nfs4_proc_pathconf(server, fhandle, pathconf),
4570 &exception);
4571 } while (exception.retry);
4572 return err;
4573}
4574
5521abfd 4575int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4576 const struct nfs_open_context *ctx,
4577 const struct nfs_lock_context *l_ctx,
4578 fmode_t fmode)
4579{
17393475 4580 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL);
9b206149
TM		 4581}
4582EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4583
5521abfd
TM		 4584static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4585 const struct nfs_open_context *ctx,
4586 const struct nfs_lock_context *l_ctx,
4587 fmode_t fmode)
4588{
4589 nfs4_stateid current_stateid;
4590
e1253be0
TM		 4591 /* If the current stateid represents a lost lock, then exit */
4592 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4593 return true;
5521abfd
TM		 4594 return nfs4_stateid_match(stateid, &current_stateid);
4595}
4596
4597static bool nfs4_error_stateid_expired(int err)
4598{
4599 switch (err) {
4600 case -NFS4ERR_DELEG_REVOKED:
4601 case -NFS4ERR_ADMIN_REVOKED:
4602 case -NFS4ERR_BAD_STATEID:
4603 case -NFS4ERR_STALE_STATEID:
4604 case -NFS4ERR_OLD_STATEID:
4605 case -NFS4ERR_OPENMODE:
4606 case -NFS4ERR_EXPIRED:
4607 return true;
4608 }
4609 return false;
4610}
4611
d45f60c6 4612static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4613{
d45f60c6 4614 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4615
d45f60c6 4616 trace_nfs4_read(hdr, task->tk_status);
9c27869d
TM		 4617 if (task->tk_status < 0) {
4618 struct nfs4_exception exception = {
4619 .inode = hdr->inode,
4620 .state = hdr->args.context->state,
4621 .stateid = &hdr->args.stateid,
4622 };
4623 task->tk_status = nfs4_async_handle_exception(task,
4624 server, task->tk_status, &exception);
4625 if (exception.retry) {
4626 rpc_restart_call_prepare(task);
4627 return -EAGAIN;
4628 }
1da177e4 4629 }
8850df99 4630
1da177e4 4631 if (task->tk_status > 0)
d45f60c6 4632 renew_lease(server, hdr->timestamp);
ec06c096 4633 return 0;
1da177e4
LT		 4634}
4635
5521abfd 4636static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4637 struct nfs_pgio_args *args)
5521abfd
TM		 4638{
4639
4640 if (!nfs4_error_stateid_expired(task->tk_status) ||
4641 nfs4_stateid_is_current(&args->stateid,
4642 args->context,
4643 args->lock_context,
4644 FMODE_READ))
4645 return false;
4646 rpc_restart_call_prepare(task);
4647 return true;
4648}
4649
d45f60c6 4650static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4651{
4652
4653 dprintk("--> %s\n", __func__);
4654
d45f60c6 4655 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4656 return -EAGAIN;
d45f60c6 4657 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4658 return -EAGAIN;
bfc505de
TM		 4659 if (task->tk_status > 0)
4660 nfs_invalidate_atime(hdr->inode);
d45f60c6
WAA		 4661 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4662 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4663}
4664
d45f60c6
WAA		 4665static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4666 struct rpc_message *msg)
1da177e4 4667{
d45f60c6 4668 hdr->timestamp = jiffies;
ca857cc1
TM		 4669 if (!hdr->pgio_done_cb)
4670 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4671 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4672 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4673}
4674
d45f60c6
WAA		 4675static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4676 struct nfs_pgio_header *hdr)
ea7c3303 4677{
d45f60c6
WAA		 4678 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4679 &hdr->args.seq_args,
4680 &hdr->res.seq_res,
9b206149 4681 task))
ef1820f9 4682 return 0;
d45f60c6
WAA		 4683 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4684 hdr->args.lock_context,
4685 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4686 return -EIO;
d45f60c6 4687 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4688 return -EIO;
4689 return 0;
1da177e4
LT		 4690}
4691
d45f60c6
WAA		 4692static int nfs4_write_done_cb(struct rpc_task *task,
4693 struct nfs_pgio_header *hdr)
1da177e4 4694{
d45f60c6 4695 struct inode *inode = hdr->inode;
8478eaa1 4696
d45f60c6 4697 trace_nfs4_write(hdr, task->tk_status);
9c27869d
TM		 4698 if (task->tk_status < 0) {
4699 struct nfs4_exception exception = {
4700 .inode = hdr->inode,
4701 .state = hdr->args.context->state,
4702 .stateid = &hdr->args.stateid,
4703 };
4704 task->tk_status = nfs4_async_handle_exception(task,
4705 NFS_SERVER(inode), task->tk_status,
4706 &exception);
4707 if (exception.retry) {
4708 rpc_restart_call_prepare(task);
4709 return -EAGAIN;
4710 }
1da177e4 4711 }
4f9838c7 4712 if (task->tk_status >= 0) {
d45f60c6 4713 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4714 nfs_writeback_update_inode(hdr);
4f9838c7 4715 }
788e7a89 4716 return 0;
1da177e4
LT		 4717}
4718
5521abfd 4719static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4720 struct nfs_pgio_args *args)
5521abfd
TM		 4721{
4722
4723 if (!nfs4_error_stateid_expired(task->tk_status) ||
4724 nfs4_stateid_is_current(&args->stateid,
4725 args->context,
4726 args->lock_context,
4727 FMODE_WRITE))
4728 return false;
4729 rpc_restart_call_prepare(task);
4730 return true;
4731}
4732
d45f60c6 4733static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4734{
d45f60c6 4735 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4736 return -EAGAIN;
d45f60c6 4737 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4738 return -EAGAIN;
d45f60c6
WAA		 4739 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4740 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4741}
4742
5a37f851 4743static
d45f60c6 4744bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4745{
5a37f851 4746 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4747 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4748 return false;
4749 /* Otherwise, request attributes if and only if we don't hold
4750 * a delegation
4751 */
011e2a7f 4752 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4753}
a69aef14 4754
d45f60c6
WAA		 4755static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4756 struct rpc_message *msg)
1da177e4 4757{
d45f60c6 4758 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4759
d45f60c6
WAA		 4760 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4761 hdr->args.bitmask = NULL;
4762 hdr->res.fattr = NULL;
7ffd1064 4763 } else
d45f60c6 4764 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4765
d45f60c6
WAA		 4766 if (!hdr->pgio_done_cb)
4767 hdr->pgio_done_cb = nfs4_write_done_cb;
4768 hdr->res.server = server;
4769 hdr->timestamp = jiffies;
1da177e4 4770
bdc7f021 4771 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4772 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4773}
4774
0b7c0153 4775static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4776{
d9afbd1b
TM		 4777 nfs4_setup_sequence(NFS_SERVER(data->inode),
4778 &data->args.seq_args,
4779 &data->res.seq_res,
4780 task);
1da177e4
LT		 4781}
4782
0b7c0153 4783static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4784{
1da177e4 4785 struct inode *inode = data->inode;
14516c3a 4786
cc668ab3 4787 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4788 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4789 NULL, NULL) == -EAGAIN) {
d00c5d43 4790 rpc_restart_call_prepare(task);
788e7a89 4791 return -EAGAIN;
1da177e4 4792 }
788e7a89 4793 return 0;
1da177e4
LT		 4794}
4795
0b7c0153 4796static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4797{
4798 if (!nfs4_sequence_done(task, &data->res.seq_res))
4799 return -EAGAIN;
0b7c0153 4800 return data->commit_done_cb(task, data);
5f452431
FI		 4801}
4802
0b7c0153 4803static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4804{
788e7a89 4805 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4806
0b7c0153
FI		 4807 if (data->commit_done_cb == NULL)
4808 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4809 data->res.server = server;
bdc7f021 4810 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4811 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4812}
4813
9bc4e3ca
CL		 4814struct nfs4_renewdata {
4815 struct nfs_client *client;
4816 unsigned long timestamp;
4817};
4818
1da177e4
LT		 4819/*
4820 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4821 * standalone procedure for queueing an asynchronous RENEW.
4822 */
9bc4e3ca 4823static void nfs4_renew_release(void *calldata)
dc96aef9 4824{
9bc4e3ca
CL		 4825 struct nfs4_renewdata *data = calldata;
4826 struct nfs_client *clp = data->client;
dc96aef9 4827
0851de06
AB		 4828 if (atomic_read(&clp->cl_count) > 1)
4829 nfs4_schedule_state_renewal(clp);
4830 nfs_put_client(clp);
9bc4e3ca 4831 kfree(data);
dc96aef9
AB		 4832}
4833
9bc4e3ca 4834static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4835{
9bc4e3ca
CL		 4836 struct nfs4_renewdata *data = calldata;
4837 struct nfs_client *clp = data->client;
4838 unsigned long timestamp = data->timestamp;
1da177e4 4839
c6d01c6f 4840 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4841 switch (task->tk_status) {
4842 case 0:
4843 break;
4844 case -NFS4ERR_LEASE_MOVED:
4845 nfs4_schedule_lease_moved_recovery(clp);
4846 break;
4847 default:
95baa25c 4848 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4849 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4850 return;
4851 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4852 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4853 return;
4854 }
4855 nfs4_schedule_path_down_recovery(clp);
1da177e4 4856 }
452e9352 4857 do_renew_lease(clp, timestamp);
1da177e4
LT		 4858}
4859
963d8fe5
TM		 4860static const struct rpc_call_ops nfs4_renew_ops = {
4861 .rpc_call_done = nfs4_renew_done,
dc96aef9 4862 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4863};
4864
2f60ea6b 4865static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4866{
4867 struct rpc_message msg = {
4868 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4869 .rpc_argp = clp,
b4454fe1 4870 .rpc_cred = cred,
1da177e4 4871 };
9bc4e3ca 4872 struct nfs4_renewdata *data;
1da177e4 4873
2f60ea6b
TM		 4874 if (renew_flags == 0)
4875 return 0;
0851de06
AB		 4876 if (!atomic_inc_not_zero(&clp->cl_count))
4877 return -EIO;
b569ad34 4878 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4879 if (data == NULL)
4880 return -ENOMEM;
4881 data->client = clp;
4882 data->timestamp = jiffies;
bc7a05ca 4883 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4884 &nfs4_renew_ops, data);
1da177e4
LT		 4885}
4886
8534d4ec 4887static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4888{
4889 struct rpc_message msg = {
4890 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4891 .rpc_argp = clp,
b4454fe1 4892 .rpc_cred = cred,
1da177e4
LT		 4893 };
4894 unsigned long now = jiffies;
4895 int status;
4896
bc7a05ca 4897 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4898 if (status < 0)
4899 return status;
452e9352 4900 do_renew_lease(clp, now);
1da177e4
LT		 4901 return 0;
4902}
4903
aa1870af
BF		 4904static inline int nfs4_server_supports_acls(struct nfs_server *server)
4905{
7dd7d959 4906 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4907}
4908
21f498c2
TM		 4909/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4910 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4911 * the stack.
4912 */
21f498c2 4913#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4914
e9e3d724 4915static int buf_to_pages_noslab(const void *buf, size_t buflen,
8fbcf237 4916 struct page **pages)
e9e3d724
NH		 4917{
4918 struct page *newpage, **spages;
4919 int rc = 0;
4920 size_t len;
4921 spages = pages;
4922
4923 do {
21f498c2 4924 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4925 newpage = alloc_page(GFP_KERNEL);
4926
4927 if (newpage == NULL)
4928 goto unwind;
4929 memcpy(page_address(newpage), buf, len);
4930 buf += len;
4931 buflen -= len;
4932 *pages++ = newpage;
4933 rc++;
4934 } while (buflen != 0);
4935
4936 return rc;
4937
4938unwind:
4939 for(; rc > 0; rc--)
4940 __free_page(spages[rc-1]);
4941 return -ENOMEM;
4942}
4943
e50a1c2e
BF		 4944struct nfs4_cached_acl {
4945 int cached;
4946 size_t len;
3e9d4154 4947 char data[0];
e50a1c2e
BF		 4948};
4949
4950static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4951{
4952 struct nfs_inode *nfsi = NFS_I(inode);
4953
4954 spin_lock(&inode->i_lock);
4955 kfree(nfsi->nfs4_acl);
4956 nfsi->nfs4_acl = acl;
4957 spin_unlock(&inode->i_lock);
4958}
4959
4960static void nfs4_zap_acl_attr(struct inode *inode)
4961{
4962 nfs4_set_cached_acl(inode, NULL);
4963}
4964
4965static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4966{
4967 struct nfs_inode *nfsi = NFS_I(inode);
4968 struct nfs4_cached_acl *acl;
4969 int ret = -ENOENT;
4970
4971 spin_lock(&inode->i_lock);
4972 acl = nfsi->nfs4_acl;
4973 if (acl == NULL)
4974 goto out;
4975 if (buf == NULL) /* user is just asking for length */
4976 goto out_len;
4977 if (acl->cached == 0)
4978 goto out;
4979 ret = -ERANGE; /* see getxattr(2) man page */
4980 if (acl->len > buflen)
4981 goto out;
4982 memcpy(buf, acl->data, acl->len);
4983out_len:
4984 ret = acl->len;
4985out:
4986 spin_unlock(&inode->i_lock);
4987 return ret;
4988}
4989
5794d21e 4990static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4991{
4992 struct nfs4_cached_acl *acl;
b291f1b1 4993 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4994
1f1ea6c2 4995 if (buflen <= PAGE_SIZE) {
b291f1b1 4996 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4997 if (acl == NULL)
4998 goto out;
4999 acl->cached = 1;
5794d21e 5000 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 5001 } else {
5002 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
5003 if (acl == NULL)
5004 goto out;
5005 acl->cached = 0;
5006 }
5007 acl->len = acl_len;
5008out:
5009 nfs4_set_cached_acl(inode, acl);
5010}
5011
bf118a34
AA		 5012/*
5013 * The getxattr API returns the required buffer length when called with a
5014 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
5015 * the required buf. On a NULL buf, we send a page of data to the server
5016 * guessing that the ACL request can be serviced by a page. If so, we cache
5017 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
5018 * the cache. If not so, we throw away the page, and cache the required
5019 * length. The next getxattr call will then produce another round trip to
5020 * the server, this time with the input buf of the required size.
5021 */
16b4289c 5022static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 5023{
bf118a34 5024 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 5025 struct nfs_getaclargs args = {
5026 .fh = NFS_FH(inode),
5027 .acl_pages = pages,
5028 .acl_len = buflen,
5029 };
663c79b3
BH		 5030 struct nfs_getaclres res = {
5031 .acl_len = buflen,
5032 };
aa1870af
BF		 5033 struct rpc_message msg = {
5034 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
5035 .rpc_argp = &args,
663c79b3 5036 .rpc_resp = &res,
aa1870af 5037 };
21f498c2
TM		 5038 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
5039 int ret = -ENOMEM, i;
aa1870af 5040
bf118a34
AA		 5041 /* As long as we're doing a round trip to the server anyway,
5042 * let's be prepared for a page of acl data. */
5043 if (npages == 0)
5044 npages = 1;
21f498c2
TM		 5045 if (npages > ARRAY_SIZE(pages))
5046 return -ERANGE;
5a006899 5047
bf118a34
AA		 5048 for (i = 0; i < npages; i++) {
5049 pages[i] = alloc_page(GFP_KERNEL);
5050 if (!pages[i])
5051 goto out_free;
e50a1c2e 5052 }
5a006899
SP		 5053
5054 /* for decoding across pages */
5055 res.acl_scratch = alloc_page(GFP_KERNEL);
5056 if (!res.acl_scratch)
5057 goto out_free;
5058
bf118a34 5059 args.acl_len = npages * PAGE_SIZE;
5a006899 5060
de040bec 5061 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 5062 __func__, buf, buflen, npages, args.acl_len);
5063 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
5064 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 5065 if (ret)
5066 goto out_free;
bf118a34 5067
1f1ea6c2
TM		 5068 /* Handle the case where the passed-in buffer is too short */
5069 if (res.acl_flags & NFS4_ACL_TRUNC) {
5070 /* Did the user only issue a request for the acl length? */
5071 if (buf == NULL)
5072 goto out_ok;
e50a1c2e 5073 ret = -ERANGE;
1f1ea6c2 5074 goto out_free;
e50a1c2e 5075 }
1f1ea6c2 5076 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 5077 if (buf) {
5078 if (res.acl_len > buflen) {
5079 ret = -ERANGE;
5080 goto out_free;
5081 }
1f1ea6c2 5082 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 5083 }
1f1ea6c2
TM		 5084out_ok:
5085 ret = res.acl_len;
e50a1c2e 5086out_free:
bf118a34
AA		 5087 for (i = 0; i < npages; i++)
5088 if (pages[i])
5089 __free_page(pages[i]);
331818f1
TM		 5090 if (res.acl_scratch)
5091 __free_page(res.acl_scratch);
aa1870af
BF		 5092 return ret;
5093}
5094
16b4289c
TM		 5095static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5096{
5097 struct nfs4_exception exception = { };
5098 ssize_t ret;
5099 do {
5100 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 5101 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 5102 if (ret >= 0)
5103 break;
5104 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
5105 } while (exception.retry);
5106 return ret;
5107}
5108
e50a1c2e
BF		 5109static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
5110{
5111 struct nfs_server *server = NFS_SERVER(inode);
5112 int ret;
5113
5114 if (!nfs4_server_supports_acls(server))
5115 return -EOPNOTSUPP;
5116 ret = nfs_revalidate_inode(server, inode);
5117 if (ret < 0)
5118 return ret;
08a22b39
AK		 5119 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
5120 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 5121 ret = nfs4_read_cached_acl(inode, buf, buflen);
5122 if (ret != -ENOENT)
bf118a34
AA		 5123 /* -ENOENT is returned if there is no ACL or if there is an ACL
5124 * but no cached acl data, just the acl length */
e50a1c2e
BF		 5125 return ret;
5126 return nfs4_get_acl_uncached(inode, buf, buflen);
5127}
5128
16b4289c 5129static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 5130{
5131 struct nfs_server *server = NFS_SERVER(inode);
5132 struct page *pages[NFS4ACL_MAXPAGES];
5133 struct nfs_setaclargs arg = {
5134 .fh = NFS_FH(inode),
5135 .acl_pages = pages,
5136 .acl_len = buflen,
5137 };
73c403a9 5138 struct nfs_setaclres res;
4b580ee3
BF		 5139 struct rpc_message msg = {
5140 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
5141 .rpc_argp = &arg,
73c403a9 5142 .rpc_resp = &res,
4b580ee3 5143 };
21f498c2 5144 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 5145 int ret, i;
4b580ee3
BF		 5146
5147 if (!nfs4_server_supports_acls(server))
5148 return -EOPNOTSUPP;
21f498c2
TM		 5149 if (npages > ARRAY_SIZE(pages))
5150 return -ERANGE;
8fbcf237 5151 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
e9e3d724
NH		 5152 if (i < 0)
5153 return i;
57ec14c5 5154 nfs4_inode_return_delegation(inode);
7c513058 5155 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 5156
5157 /*
5158 * Free each page after tx, so the only ref left is
5159 * held by the network stack
5160 */
5161 for (; i > 0; i--)
5162 put_page(pages[i-1]);
5163
08a22b39
AK		 5164 /*
5165 * Acl update can result in inode attribute update.
5166 * so mark the attribute cache invalid.
5167 */
5168 spin_lock(&inode->i_lock);
5169 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
5170 spin_unlock(&inode->i_lock);
f41f7418
TM		 5171 nfs_access_zap_cache(inode);
5172 nfs_zap_acl_cache(inode);
4b580ee3
BF		 5173 return ret;
5174}
5175
16b4289c
TM		 5176static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5177{
5178 struct nfs4_exception exception = { };
5179 int err;
5180 do {
c1578b76
TM		 5181 err = __nfs4_proc_set_acl(inode, buf, buflen);
5182 trace_nfs4_set_acl(inode, err);
5183 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 5184 &exception);
5185 } while (exception.retry);
5186 return err;
5187}
5188
aa9c2669
DQ		 5189#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5190static int _nfs4_get_security_label(struct inode *inode, void *buf,
5191 size_t buflen)
5192{
5193 struct nfs_server *server = NFS_SERVER(inode);
5194 struct nfs_fattr fattr;
5195 struct nfs4_label label = {0, 0, buflen, buf};
5196
5197 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 5198 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 5199 .fh = NFS_FH(inode),
5200 .bitmask = bitmask,
5201 };
5202 struct nfs4_getattr_res res = {
5203 .fattr = &fattr,
5204 .label = &label,
5205 .server = server,
5206 };
5207 struct rpc_message msg = {
5208 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 5209 .rpc_argp = &arg,
aa9c2669
DQ		 5210 .rpc_resp = &res,
5211 };
5212 int ret;
5213
5214 nfs_fattr_init(&fattr);
5215
fcb63a9b 5216 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 5217 if (ret)
5218 return ret;
5219 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
5220 return -ENOENT;
5221 if (buflen < label.len)
5222 return -ERANGE;
5223 return 0;
5224}
5225
5226static int nfs4_get_security_label(struct inode *inode, void *buf,
5227 size_t buflen)
5228{
5229 struct nfs4_exception exception = { };
5230 int err;
5231
5232 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5233 return -EOPNOTSUPP;
5234
5235 do {
c1578b76
TM		 5236 err = _nfs4_get_security_label(inode, buf, buflen);
5237 trace_nfs4_get_security_label(inode, err);
5238 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5239 &exception);
5240 } while (exception.retry);
5241 return err;
5242}
5243
5244static int _nfs4_do_set_security_label(struct inode *inode,
5245 struct nfs4_label *ilabel,
5246 struct nfs_fattr *fattr,
5247 struct nfs4_label *olabel)
5248{
5249
5250 struct iattr sattr = {0};
5251 struct nfs_server *server = NFS_SERVER(inode);
5252 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 5253 struct nfs_setattrargs arg = {
aa9c2669
DQ		 5254 .fh = NFS_FH(inode),
5255 .iap = &sattr,
5256 .server = server,
5257 .bitmask = bitmask,
5258 .label = ilabel,
5259 };
5260 struct nfs_setattrres res = {
5261 .fattr = fattr,
5262 .label = olabel,
5263 .server = server,
5264 };
5265 struct rpc_message msg = {
5266 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 5267 .rpc_argp = &arg,
aa9c2669
DQ		 5268 .rpc_resp = &res,
5269 };
5270 int status;
5271
12207f69 5272 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 5273
12207f69 5274 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 5275 if (status)
5276 dprintk("%s failed: %d\n", __func__, status);
5277
5278 return status;
5279}
5280
5281static int nfs4_do_set_security_label(struct inode *inode,
5282 struct nfs4_label *ilabel,
5283 struct nfs_fattr *fattr,
5284 struct nfs4_label *olabel)
5285{
5286 struct nfs4_exception exception = { };
5287 int err;
5288
5289 do {
c1578b76
TM		 5290 err = _nfs4_do_set_security_label(inode, ilabel,
5291 fattr, olabel);
5292 trace_nfs4_set_security_label(inode, err);
5293 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5294 &exception);
5295 } while (exception.retry);
5296 return err;
5297}
5298
5299static int
59301226 5300nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
aa9c2669
DQ		 5301{
5302 struct nfs4_label ilabel, *olabel = NULL;
5303 struct nfs_fattr fattr;
5304 struct rpc_cred *cred;
aa9c2669
DQ		 5305 int status;
5306
5307 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5308 return -EOPNOTSUPP;
5309
5310 nfs_fattr_init(&fattr);
5311
5312 ilabel.pi = 0;
5313 ilabel.lfs = 0;
5314 ilabel.label = (char *)buf;
5315 ilabel.len = buflen;
5316
5317 cred = rpc_lookup_cred();
5318 if (IS_ERR(cred))
5319 return PTR_ERR(cred);
5320
5321 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5322 if (IS_ERR(olabel)) {
5323 status = -PTR_ERR(olabel);
5324 goto out;
5325 }
5326
5327 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5328 if (status == 0)
5329 nfs_setsecurity(inode, &fattr, olabel);
5330
5331 nfs4_label_free(olabel);
5332out:
5333 put_rpccred(cred);
5334 return status;
5335}
5336#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5337
5338
f092075d
CL		 5339static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5340 nfs4_verifier *bootverf)
cd93710e
CL		 5341{
5342 __be32 verf[2];
5343
2c820d9a
CL		 5344 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5345 /* An impossible timestamp guarantees this value
5346 * will never match a generated boot time. */
2f86e091
DD		 5347 verf[0] = cpu_to_be32(U32_MAX);
5348 verf[1] = cpu_to_be32(U32_MAX);
2c820d9a 5349 } else {
f092075d 5350 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
2f86e091
DD		 5351 u64 ns = ktime_to_ns(nn->boot_time);
5352
5353 verf[0] = cpu_to_be32(ns >> 32);
5354 verf[1] = cpu_to_be32(ns);
2c820d9a 5355 }
cd93710e
CL		 5356 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5357}
5358
a3192688
JL		 5359static int
5360nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 5361{
a3192688
JL		 5362 size_t len;
5363 char *str;
e984a55a 5364
ceb3a16c 5365 if (clp->cl_owner_id != NULL)
a3192688 5366 return 0;
4a3e5779 5367
a3192688 5368 rcu_read_lock();
4a70316c 5369 len = 14 + strlen(clp->cl_ipaddr) + 1 +
a3192688
JL		 5370 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5371 1 +
5372 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5373 1;
5374 rcu_read_unlock();
5375
5376 if (len > NFS4_OPAQUE_LIMIT + 1)
5377 return -EINVAL;
5378
5379 /*
5380 * Since this string is allocated at mount time, and held until the
5381 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5382 * about a memory-reclaim deadlock.
5383 */
5384 str = kmalloc(len, GFP_KERNEL);
5385 if (!str)
5386 return -ENOMEM;
ceb3a16c 5387
e984a55a 5388 rcu_read_lock();
f2dd436e 5389 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
a3192688
JL		 5390 clp->cl_ipaddr,
5391 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5392 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5393 rcu_read_unlock();
a3192688 5394
a3192688
JL		 5395 clp->cl_owner_id = str;
5396 return 0;
e984a55a
CL		 5397}
5398
873e3851
JL		 5399static int
5400nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5401{
873e3851
JL		 5402 size_t len;
5403 char *str;
5404
5405 len = 10 + 10 + 1 + 10 + 1 +
5406 strlen(nfs4_client_id_uniquifier) + 1 +
5407 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5408
5409 if (len > NFS4_OPAQUE_LIMIT + 1)
5410 return -EINVAL;
5411
5412 /*
5413 * Since this string is allocated at mount time, and held until the
5414 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5415 * about a memory-reclaim deadlock.
5416 */
5417 str = kmalloc(len, GFP_KERNEL);
5418 if (!str)
5419 return -ENOMEM;
5420
f2dd436e 5421 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
873e3851
JL		 5422 clp->rpc_ops->version, clp->cl_minorversion,
5423 nfs4_client_id_uniquifier,
5424 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5425 clp->cl_owner_id = str;
5426 return 0;
5427}
5428
5429static int
5430nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5431{
873e3851
JL		 5432 size_t len;
5433 char *str;
ceb3a16c
TM		 5434
5435 if (clp->cl_owner_id != NULL)
873e3851 5436 return 0;
6f2ea7f2
CL		 5437
5438 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5439 return nfs4_init_uniquifier_client_string(clp);
5440
5441 len = 10 + 10 + 1 + 10 + 1 +
5442 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5443
5444 if (len > NFS4_OPAQUE_LIMIT + 1)
5445 return -EINVAL;
5446
5447 /*
5448 * Since this string is allocated at mount time, and held until the
5449 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5450 * about a memory-reclaim deadlock.
5451 */
5452 str = kmalloc(len, GFP_KERNEL);
5453 if (!str)
5454 return -ENOMEM;
5455
f2dd436e 5456 scnprintf(str, len, "Linux NFSv%u.%u %s",
873e3851
JL		 5457 clp->rpc_ops->version, clp->cl_minorversion,
5458 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5459 clp->cl_owner_id = str;
5460 return 0;
e984a55a
CL		 5461}
5462
706cb8db
CL		 5463/*
5464 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5465 * services. Advertise one based on the address family of the
5466 * clientaddr.
5467 */
5468static unsigned int
5469nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5470{
5471 if (strchr(clp->cl_ipaddr, ':') != NULL)
5472 return scnprintf(buf, len, "tcp6");
5473 else
5474 return scnprintf(buf, len, "tcp");
5475}
5476
f11b2a1c
JL		 5477static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5478{
5479 struct nfs4_setclientid *sc = calldata;
5480
5481 if (task->tk_status == 0)
5482 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5483}
5484
5485static const struct rpc_call_ops nfs4_setclientid_ops = {
5486 .rpc_call_done = nfs4_setclientid_done,
5487};
5488
6bbb4ae8
CL		 5489/**
5490 * nfs4_proc_setclientid - Negotiate client ID
5491 * @clp: state data structure
5492 * @program: RPC program for NFSv4 callback service
5493 * @port: IP port number for NFS4 callback service
5494 * @cred: RPC credential to use for this call
5495 * @res: where to place the result
5496 *
5497 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5498 */
bb8b27e5
TM		 5499int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5500 unsigned short port, struct rpc_cred *cred,
5501 struct nfs4_setclientid_res *res)
1da177e4
LT		 5502{
5503 nfs4_verifier sc_verifier;
5504 struct nfs4_setclientid setclientid = {
5505 .sc_verifier = &sc_verifier,
5506 .sc_prog = program,
3a6bb738 5507 .sc_clnt = clp,
1da177e4
LT		 5508 };
5509 struct rpc_message msg = {
5510 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5511 .rpc_argp = &setclientid,
bb8b27e5 5512 .rpc_resp = res,
286d7d6a 5513 .rpc_cred = cred,
1da177e4 5514 };
f11b2a1c
JL		 5515 struct rpc_task *task;
5516 struct rpc_task_setup task_setup_data = {
5517 .rpc_client = clp->cl_rpcclient,
5518 .rpc_message = &msg,
5519 .callback_ops = &nfs4_setclientid_ops,
5520 .callback_data = &setclientid,
5521 .flags = RPC_TASK_TIMEOUT,
5522 };
6bbb4ae8 5523 int status;
1da177e4 5524
de734831 5525 /* nfs_client_id4 */
f092075d 5526 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5527
5528 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5529 status = nfs4_init_uniform_client_string(clp);
5530 else
a3192688 5531 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5532
5533 if (status)
5534 goto out;
3a6bb738 5535
de734831 5536 /* cb_client4 */
706cb8db
CL		 5537 setclientid.sc_netid_len =
5538 nfs4_init_callback_netid(clp,
5539 setclientid.sc_netid,
5540 sizeof(setclientid.sc_netid));
de734831 5541 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5542 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5543 clp->cl_ipaddr, port >> 8, port & 255);
5544
3a6bb738 5545 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5546 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5547 clp->cl_owner_id);
f11b2a1c
JL		 5548 task = rpc_run_task(&task_setup_data);
5549 if (IS_ERR(task)) {
5550 status = PTR_ERR(task);
5551 goto out;
5552 }
5553 status = task->tk_status;
5554 if (setclientid.sc_cred) {
5555 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5556 put_rpccred(setclientid.sc_cred);
5557 }
5558 rpc_put_task(task);
5559out:
c6d01c6f 5560 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5561 dprintk("NFS reply setclientid: %d\n", status);
5562 return status;
1da177e4
LT		 5563}
5564
6bbb4ae8
CL		 5565/**
5566 * nfs4_proc_setclientid_confirm - Confirm client ID
5567 * @clp: state data structure
5568 * @res: result of a previous SETCLIENTID
5569 * @cred: RPC credential to use for this call
5570 *
5571 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5572 */
fd954ae1 5573int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5574 struct nfs4_setclientid_res *arg,
5575 struct rpc_cred *cred)
1da177e4 5576{
1da177e4
LT		 5577 struct rpc_message msg = {
5578 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5579 .rpc_argp = arg,
286d7d6a 5580 .rpc_cred = cred,
1da177e4 5581 };
1da177e4
LT		 5582 int status;
5583
6bbb4ae8
CL		 5584 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5585 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5586 clp->cl_clientid);
1bd714f2 5587 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5588 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5589 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5590 return status;
5591}
5592
fe650407
TM		 5593struct nfs4_delegreturndata {
5594 struct nfs4_delegreturnargs args;
fa178f29 5595 struct nfs4_delegreturnres res;
fe650407
TM		 5596 struct nfs_fh fh;
5597 nfs4_stateid stateid;
26e976a8 5598 unsigned long timestamp;
586f1c39
TM		 5599 struct {
5600 struct nfs4_layoutreturn_args arg;
5601 struct nfs4_layoutreturn_res res;
5602 u32 roc_barrier;
5603 bool roc;
5604 } lr;
fa178f29 5605 struct nfs_fattr fattr;
fe650407 5606 int rpc_status;
039b756a 5607 struct inode *inode;
fe650407
TM		 5608};
5609
fe650407
TM		 5610static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5611{
5612 struct nfs4_delegreturndata *data = calldata;
938e1010 5613
14516c3a
TM		 5614 if (!nfs4_sequence_done(task, &data->res.seq_res))
5615 return;
938e1010 5616
ca8acf8d 5617 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
586f1c39
TM		 5618
5619 /* Handle Layoutreturn errors */
5620 if (data->args.lr_args && task->tk_status != 0) {
5621 switch(data->res.lr_ret) {
5622 default:
5623 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
5624 break;
5625 case 0:
5626 data->args.lr_args = NULL;
5627 data->res.lr_res = NULL;
5628 break;
5629 case -NFS4ERR_ADMIN_REVOKED:
5630 case -NFS4ERR_DELEG_REVOKED:
5631 case -NFS4ERR_EXPIRED:
5632 case -NFS4ERR_BAD_STATEID:
5633 case -NFS4ERR_OLD_STATEID:
5634 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
5635 case -NFS4ERR_WRONG_CRED:
5636 data->args.lr_args = NULL;
5637 data->res.lr_res = NULL;
5638 data->res.lr_ret = 0;
5639 rpc_restart_call_prepare(task);
5640 return;
5641 }
5642 }
5643
79708861 5644 switch (task->tk_status) {
79708861 5645 case 0:
fa178f29 5646 renew_lease(data->res.server, data->timestamp);
23ea44c2 5647 break;
c97cf606
TM		 5648 case -NFS4ERR_ADMIN_REVOKED:
5649 case -NFS4ERR_DELEG_REVOKED:
26d36301
TM		 5650 case -NFS4ERR_EXPIRED:
5651 nfs4_free_revoked_stateid(data->res.server,
5652 data->args.stateid,
5653 task->tk_msg.rpc_cred);
c97cf606
TM		 5654 case -NFS4ERR_BAD_STATEID:
5655 case -NFS4ERR_OLD_STATEID:
5656 case -NFS4ERR_STALE_STATEID:
c97cf606
TM		 5657 task->tk_status = 0;
5658 break;
79708861 5659 default:
8478eaa1
N		 5660 if (nfs4_async_handle_error(task, data->res.server,
5661 NULL, NULL) == -EAGAIN) {
d00c5d43 5662 rpc_restart_call_prepare(task);
79708861
RL		 5663 return;
5664 }
5665 }
5666 data->rpc_status = task->tk_status;
fe650407
TM		 5667}
5668
5669static void nfs4_delegreturn_release(void *calldata)
5670{
039b756a 5671 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5672 struct inode *inode = data->inode;
039b756a 5673
ea7c38fe 5674 if (inode) {
586f1c39 5675 if (data->lr.roc)
1c5bd76d
TM		 5676 pnfs_roc_release(&data->lr.arg, &data->lr.res,
5677 data->res.lr_ret);
ea7c38fe
TM		 5678 nfs_iput_and_deactive(inode);
5679 }
fe650407
TM		 5680 kfree(calldata);
5681}
5682
938e1010
AA		 5683static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5684{
5685 struct nfs4_delegreturndata *d_data;
5686
5687 d_data = (struct nfs4_delegreturndata *)data;
5688
1c5bd76d 5689 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task))
500d701f
PT		 5690 return;
5691
d9afbd1b
TM		 5692 nfs4_setup_sequence(d_data->res.server,
5693 &d_data->args.seq_args,
5694 &d_data->res.seq_res,
5695 task);
938e1010 5696}
938e1010 5697
c8d149f3 5698static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5699 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5700 .rpc_call_done = nfs4_delegreturn_done,
5701 .rpc_release = nfs4_delegreturn_release,
5702};
5703
e6f81075 5704static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5705{
5706 struct nfs4_delegreturndata *data;
fa178f29 5707 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5708 struct rpc_task *task;
5138fde0
TM		 5709 struct rpc_message msg = {
5710 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5711 .rpc_cred = cred,
5712 };
c970aa85
TM		 5713 struct rpc_task_setup task_setup_data = {
5714 .rpc_client = server->client,
5138fde0 5715 .rpc_message = &msg,
c970aa85
TM		 5716 .callback_ops = &nfs4_delegreturn_ops,
5717 .flags = RPC_TASK_ASYNC,
5718 };
e6f81075 5719 int status = 0;
fe650407 5720
8535b2be 5721 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5722 if (data == NULL)
5723 return -ENOMEM;
a9c92d6b 5724 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
99ade3c7
AE		 5725
5726 nfs4_state_protect(server->nfs_client,
5727 NFS_SP4_MACH_CRED_CLEANUP,
5728 &task_setup_data.rpc_client, &msg);
5729
fe650407
TM		 5730 data->args.fhandle = &data->fh;
5731 data->args.stateid = &data->stateid;
9e907fec 5732 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5733 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5734 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5735 data->res.fattr = &data->fattr;
5736 data->res.server = server;
586f1c39 5737 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
5138fde0 5738 nfs_fattr_init(data->res.fattr);
26e976a8 5739 data->timestamp = jiffies;
fe650407 5740 data->rpc_status = 0;
53e6fc86 5741 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, cred);
ea7c38fe 5742 data->inode = nfs_igrab_and_active(inode);
1c5bd76d 5743 if (data->inode) {
1c5bd76d
TM		 5744 if (data->lr.roc) {
5745 data->args.lr_args = &data->lr.arg;
5746 data->res.lr_res = &data->lr.res;
5747 }
53e6fc86
TM		 5748 } else if (data->lr.roc) {
5749 pnfs_roc_release(&data->lr.arg, &data->lr.res, 0);
5750 data->lr.roc = false;
1c5bd76d 5751 }
fe650407 5752
c970aa85 5753 task_setup_data.callback_data = data;
1174dd1f
TM		 5754 msg.rpc_argp = &data->args;
5755 msg.rpc_resp = &data->res;
c970aa85 5756 task = rpc_run_task(&task_setup_data);
7a1218a2 5757 if (IS_ERR(task))
fe650407 5758 return PTR_ERR(task);
e6f81075
TM		 5759 if (!issync)
5760 goto out;
fe650407 5761 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5762 if (status != 0)
5763 goto out;
5764 status = data->rpc_status;
e144cbcc
TM		 5765 if (status == 0)
5766 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5767 else
5768 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5769out:
e6b3c4db 5770 rpc_put_task(task);
fe650407 5771 return status;
1da177e4
LT		 5772}
5773
e6f81075 5774int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5775{
5776 struct nfs_server *server = NFS_SERVER(inode);
5777 struct nfs4_exception exception = { };
5778 int err;
5779 do {
e6f81075 5780 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
48c9579a 5781 trace_nfs4_delegreturn(inode, stateid, err);
1da177e4
LT		 5782 switch (err) {
5783 case -NFS4ERR_STALE_STATEID:
5784 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5785 case 0:
5786 return 0;
5787 }
5788 err = nfs4_handle_exception(server, err, &exception);
5789 } while (exception.retry);
5790 return err;
5791}
5792
1da177e4
LT		 5793static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5794{
5795 struct inode *inode = state->inode;
5796 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5797 struct nfs_client *clp = server->nfs_client;
911d1aaf 5798 struct nfs_lockt_args arg = {
1da177e4 5799 .fh = NFS_FH(inode),
911d1aaf 5800 .fl = request,
1da177e4 5801 };
911d1aaf
TM		 5802 struct nfs_lockt_res res = {
5803 .denied = request,
1da177e4
LT		 5804 };
5805 struct rpc_message msg = {
5806 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5807 .rpc_argp = &arg,
5808 .rpc_resp = &res,
5809 .rpc_cred = state->owner->so_cred,
5810 };
1da177e4
LT		 5811 struct nfs4_lock_state *lsp;
5812 int status;
5813
911d1aaf 5814 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5815 status = nfs4_set_lock_state(state, request);
5816 if (status != 0)
5817 goto out;
5818 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5819 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5820 arg.lock_owner.s_dev = server->s_dev;
7c513058 5821 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5822 switch (status) {
5823 case 0:
5824 request->fl_type = F_UNLCK;
5825 break;
5826 case -NFS4ERR_DENIED:
5827 status = 0;
1da177e4 5828 }
70cc6487 5829 request->fl_ops->fl_release_private(request);
a6f951dd 5830 request->fl_ops = NULL;
8d0a8a9d 5831out:
1da177e4
LT		 5832 return status;
5833}
5834
5835static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5836{
5837 struct nfs4_exception exception = { };
5838 int err;
5839
5840 do {
d1b748a5
TM		 5841 err = _nfs4_proc_getlk(state, cmd, request);
5842 trace_nfs4_get_lock(request, state, cmd, err);
5843 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5844 &exception);
5845 } while (exception.retry);
5846 return err;
5847}
5848
faf5f49c 5849struct nfs4_unlockdata {
911d1aaf
TM		 5850 struct nfs_locku_args arg;
5851 struct nfs_locku_res res;
faf5f49c
TM		 5852 struct nfs4_lock_state *lsp;
5853 struct nfs_open_context *ctx;
911d1aaf 5854 struct file_lock fl;
516285eb 5855 struct nfs_server *server;
26e976a8 5856 unsigned long timestamp;
faf5f49c
TM		 5857};
5858
911d1aaf
TM		 5859static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5860 struct nfs_open_context *ctx,
5861 struct nfs4_lock_state *lsp,
5862 struct nfs_seqid *seqid)
5863{
5864 struct nfs4_unlockdata *p;
5865 struct inode *inode = lsp->ls_state->inode;
5866
8535b2be 5867 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5868 if (p == NULL)
5869 return NULL;
5870 p->arg.fh = NFS_FH(inode);
5871 p->arg.fl = &p->fl;
5872 p->arg.seqid = seqid;
c1d51931 5873 p->res.seqid = seqid;
911d1aaf
TM		 5874 p->lsp = lsp;
5875 atomic_inc(&lsp->ls_count);
5876 /* Ensure we don't close file until we're done freeing locks! */
5877 p->ctx = get_nfs_open_context(ctx);
5878 memcpy(&p->fl, fl, sizeof(p->fl));
5879 p->server = NFS_SERVER(inode);
5880 return p;
5881}
5882
06f814a3 5883static void nfs4_locku_release_calldata(void *data)
faf5f49c 5884{
963d8fe5 5885 struct nfs4_unlockdata *calldata = data;
911d1aaf 5886 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5887 nfs4_put_lock_state(calldata->lsp);
5888 put_nfs_open_context(calldata->ctx);
5889 kfree(calldata);
faf5f49c
TM		 5890}
5891
963d8fe5 5892static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5893{
963d8fe5 5894 struct nfs4_unlockdata *calldata = data;
faf5f49c 5895
14516c3a
TM		 5896 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5897 return;
faf5f49c
TM		 5898 switch (task->tk_status) {
5899 case 0:
26e976a8 5900 renew_lease(calldata->server, calldata->timestamp);
75575ddf 5901 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 5902 if (nfs4_update_lock_stateid(calldata->lsp,
5903 &calldata->res.stateid))
5904 break;
26d36301
TM		 5905 case -NFS4ERR_ADMIN_REVOKED:
5906 case -NFS4ERR_EXPIRED:
5907 nfs4_free_revoked_stateid(calldata->server,
5908 &calldata->arg.stateid,
5909 task->tk_msg.rpc_cred);
9e33bed5
TM		 5910 case -NFS4ERR_BAD_STATEID:
5911 case -NFS4ERR_OLD_STATEID:
faf5f49c 5912 case -NFS4ERR_STALE_STATEID:
425c1d4e
TM		 5913 if (!nfs4_stateid_match(&calldata->arg.stateid,
5914 &calldata->lsp->ls_stateid))
5915 rpc_restart_call_prepare(task);
faf5f49c
TM		 5916 break;
5917 default:
8478eaa1
N		 5918 if (nfs4_async_handle_error(task, calldata->server,
5919 NULL, NULL) == -EAGAIN)
d00c5d43 5920 rpc_restart_call_prepare(task);
faf5f49c 5921 }
2b1bc308 5922 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5923}
5924
4ce70ada 5925static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5926{
4ce70ada 5927 struct nfs4_unlockdata *calldata = data;
faf5f49c 5928
911d1aaf 5929 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5930 goto out_wait;
425c1d4e 5931 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5932 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5933 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5934 goto out_no_action;
faf5f49c 5935 }
26e976a8 5936 calldata->timestamp = jiffies;
035168ab 5937 if (nfs4_setup_sequence(calldata->server,
a893693c 5938 &calldata->arg.seq_args,
2240a9e2
TM		 5939 &calldata->res.seq_res,
5940 task) != 0)
5941 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5942 return;
5943out_no_action:
5944 task->tk_action = NULL;
5945out_wait:
5946 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5947}
5948
963d8fe5 5949static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5950 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5951 .rpc_call_done = nfs4_locku_done,
06f814a3 5952 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5953};
5954
a5d16a4d
TM		 5955static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5956 struct nfs_open_context *ctx,
5957 struct nfs4_lock_state *lsp,
5958 struct nfs_seqid *seqid)
5959{
5960 struct nfs4_unlockdata *data;
5138fde0
TM		 5961 struct rpc_message msg = {
5962 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5963 .rpc_cred = ctx->cred,
5964 };
c970aa85
TM		 5965 struct rpc_task_setup task_setup_data = {
5966 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5967 .rpc_message = &msg,
c970aa85 5968 .callback_ops = &nfs4_locku_ops,
101070ca 5969 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5970 .flags = RPC_TASK_ASYNC,
5971 };
a5d16a4d 5972
fa940720
WAA		 5973 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5974 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5975
137d6aca
FF		 5976 /* Ensure this is an unlock - when canceling a lock, the
5977 * canceled lock is passed in, and it won't be an unlock.
5978 */
5979 fl->fl_type = F_UNLCK;
5980
a5d16a4d
TM		 5981 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5982 if (data == NULL) {
5983 nfs_free_seqid(seqid);
5984 return ERR_PTR(-ENOMEM);
5985 }
5986
a9c92d6b 5987 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5988 msg.rpc_argp = &data->arg;
5989 msg.rpc_resp = &data->res;
c970aa85
TM		 5990 task_setup_data.callback_data = data;
5991 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5992}
5993
faf5f49c
TM		 5994static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5995{
65b62a29
TM		 5996 struct inode *inode = state->inode;
5997 struct nfs4_state_owner *sp = state->owner;
5998 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5999 struct nfs_seqid *seqid;
1da177e4 6000 struct nfs4_lock_state *lsp;
06f814a3 6001 struct rpc_task *task;
b4019c0e 6002 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 6003 int status = 0;
536ff0f8 6004 unsigned char fl_flags = request->fl_flags;
faf5f49c 6005
8d0a8a9d 6006 status = nfs4_set_lock_state(state, request);
9b073574
TM		 6007 /* Unlock _before_ we do the RPC call */
6008 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 6009 /* Exclude nfs_delegation_claim_locks() */
6010 mutex_lock(&sp->so_delegreturn_mutex);
6011 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 6012 down_read(&nfsi->rwsem);
75575ddf 6013 if (locks_lock_inode_wait(inode, request) == -ENOENT) {
19e03c57 6014 up_read(&nfsi->rwsem);
65b62a29 6015 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 6016 goto out;
19e03c57
TM		 6017 }
6018 up_read(&nfsi->rwsem);
65b62a29 6019 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 6020 if (status != 0)
9b073574
TM		 6021 goto out;
6022 /* Is this a delegated lock? */
8d0a8a9d 6023 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 6024 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
6025 goto out;
b4019c0e
TM		 6026 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
6027 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 6028 status = -ENOMEM;
badc76dd 6029 if (IS_ERR(seqid))
9b073574 6030 goto out;
cd3758e3 6031 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 6032 status = PTR_ERR(task);
6033 if (IS_ERR(task))
9b073574 6034 goto out;
a5d16a4d 6035 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 6036 rpc_put_task(task);
9b073574 6037out:
536ff0f8 6038 request->fl_flags = fl_flags;
d1b748a5 6039 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 6040 return status;
6041}
6042
a5d16a4d
TM		 6043struct nfs4_lockdata {
6044 struct nfs_lock_args arg;
6045 struct nfs_lock_res res;
6046 struct nfs4_lock_state *lsp;
6047 struct nfs_open_context *ctx;
6048 struct file_lock fl;
26e976a8 6049 unsigned long timestamp;
a5d16a4d
TM		 6050 int rpc_status;
6051 int cancelled;
66179efe 6052 struct nfs_server *server;
a5d16a4d
TM		 6053};
6054
6055static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 6056 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
6057 gfp_t gfp_mask)
1da177e4 6058{
a5d16a4d
TM		 6059 struct nfs4_lockdata *p;
6060 struct inode *inode = lsp->ls_state->inode;
1da177e4 6061 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 6062 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 6063
8535b2be 6064 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 6065 if (p == NULL)
6066 return NULL;
6067
6068 p->arg.fh = NFS_FH(inode);
6069 p->arg.fl = &p->fl;
8535b2be 6070 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 6071 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 6072 goto out_free;
b4019c0e
TM		 6073 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
6074 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 6075 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 6076 goto out_free_seqid;
7539bbab 6077 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 6078 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 6079 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 6080 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 6081 p->lsp = lsp;
66179efe 6082 p->server = server;
a5d16a4d
TM		 6083 atomic_inc(&lsp->ls_count);
6084 p->ctx = get_nfs_open_context(ctx);
feaff8e5 6085 get_file(fl->fl_file);
a5d16a4d
TM		 6086 memcpy(&p->fl, fl, sizeof(p->fl));
6087 return p;
2f74c0a0
TM		 6088out_free_seqid:
6089 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 6090out_free:
6091 kfree(p);
6092 return NULL;
6093}
6094
6095static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
6096{
6097 struct nfs4_lockdata *data = calldata;
6098 struct nfs4_state *state = data->lsp->ls_state;
06735b34 6099
3110ff80 6100 dprintk("%s: begin!\n", __func__);
2f74c0a0 6101 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 6102 goto out_wait;
a5d16a4d 6103 /* Do we need to do an open_to_lock_owner? */
6b447539 6104 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 6105 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 6106 goto out_release_lock_seqid;
8fe72bac 6107 }
425c1d4e
TM		 6108 nfs4_stateid_copy(&data->arg.open_stateid,
6109 &state->open_stateid);
a5d16a4d 6110 data->arg.new_lock_owner = 1;
c1d51931 6111 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 6112 } else {
2f74c0a0 6113 data->arg.new_lock_owner = 0;
425c1d4e
TM		 6114 nfs4_stateid_copy(&data->arg.lock_stateid,
6115 &data->lsp->ls_stateid);
6116 }
5d422301
TM		 6117 if (!nfs4_valid_open_stateid(state)) {
6118 data->rpc_status = -EBADF;
6119 task->tk_action = NULL;
6120 goto out_release_open_seqid;
6121 }
26e976a8 6122 data->timestamp = jiffies;
035168ab
TM		 6123 if (nfs4_setup_sequence(data->server,
6124 &data->arg.seq_args,
2240a9e2 6125 &data->res.seq_res,
d9afbd1b 6126 task) == 0)
66179efe 6127 return;
5d422301 6128out_release_open_seqid:
2240a9e2
TM		 6129 nfs_release_seqid(data->arg.open_seqid);
6130out_release_lock_seqid:
6131 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 6132out_wait:
6133 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 6134 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 6135}
6136
a5d16a4d
TM		 6137static void nfs4_lock_done(struct rpc_task *task, void *calldata)
6138{
6139 struct nfs4_lockdata *data = calldata;
39071e6f 6140 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 6141
3110ff80 6142 dprintk("%s: begin!\n", __func__);
a5d16a4d 6143
14516c3a
TM		 6144 if (!nfs4_sequence_done(task, &data->res.seq_res))
6145 return;
66179efe 6146
a5d16a4d 6147 data->rpc_status = task->tk_status;
425c1d4e
TM		 6148 switch (task->tk_status) {
6149 case 0:
2b0143b5 6150 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 6151 data->timestamp);
c69899a1
TM		 6152 if (data->arg.new_lock) {
6153 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
75575ddf 6154 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) {
c69899a1
TM		 6155 rpc_restart_call_prepare(task);
6156 break;
6157 }
6158 }
39071e6f
TM		 6159 if (data->arg.new_lock_owner != 0) {
6160 nfs_confirm_seqid(&lsp->ls_seqid, 0);
6161 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
6162 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6163 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
6164 rpc_restart_call_prepare(task);
425c1d4e
TM		 6165 break;
6166 case -NFS4ERR_BAD_STATEID:
6167 case -NFS4ERR_OLD_STATEID:
6168 case -NFS4ERR_STALE_STATEID:
6169 case -NFS4ERR_EXPIRED:
6170 if (data->arg.new_lock_owner != 0) {
6171 if (!nfs4_stateid_match(&data->arg.open_stateid,
6172 &lsp->ls_state->open_stateid))
6173 rpc_restart_call_prepare(task);
6174 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
6175 &lsp->ls_stateid))
6176 rpc_restart_call_prepare(task);
a5d16a4d 6177 }
3110ff80 6178 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 6179}
6180
6181static void nfs4_lock_release(void *calldata)
6182{
6183 struct nfs4_lockdata *data = calldata;
6184
3110ff80 6185 dprintk("%s: begin!\n", __func__);
2f74c0a0 6186 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 6187 if (data->cancelled != 0) {
6188 struct rpc_task *task;
6189 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
6190 data->arg.lock_seqid);
6191 if (!IS_ERR(task))
bf294b41 6192 rpc_put_task_async(task);
3110ff80 6193 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 6194 } else
6195 nfs_free_seqid(data->arg.lock_seqid);
6196 nfs4_put_lock_state(data->lsp);
6197 put_nfs_open_context(data->ctx);
feaff8e5 6198 fput(data->fl.fl_file);
a5d16a4d 6199 kfree(data);
3110ff80 6200 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 6201}
6202
6203static const struct rpc_call_ops nfs4_lock_ops = {
6204 .rpc_call_prepare = nfs4_lock_prepare,
6205 .rpc_call_done = nfs4_lock_done,
6206 .rpc_release = nfs4_lock_release,
6207};
6208
2bee72a6
TM		 6209static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
6210{
2bee72a6
TM		 6211 switch (error) {
6212 case -NFS4ERR_ADMIN_REVOKED:
d7f3e4bf 6213 case -NFS4ERR_EXPIRED:
2bee72a6 6214 case -NFS4ERR_BAD_STATEID:
ecac799a 6215 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 6216 if (new_lock_owner != 0 ||
795a88c9 6217 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 6218 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 6219 break;
6220 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 6221 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a 6222 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 6223 };
6224}
6225
afe6c27c 6226static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 6227{
6228 struct nfs4_lockdata *data;
6229 struct rpc_task *task;
5138fde0
TM		 6230 struct rpc_message msg = {
6231 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
6232 .rpc_cred = state->owner->so_cred,
6233 };
c970aa85
TM		 6234 struct rpc_task_setup task_setup_data = {
6235 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 6236 .rpc_message = &msg,
c970aa85 6237 .callback_ops = &nfs4_lock_ops,
101070ca 6238 .workqueue = nfsiod_workqueue,
c970aa85
TM		 6239 .flags = RPC_TASK_ASYNC,
6240 };
a5d16a4d
TM		 6241 int ret;
6242
3110ff80 6243 dprintk("%s: begin!\n", __func__);
cd3758e3 6244 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 6245 fl->fl_u.nfs4_fl.owner,
6246 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 6247 if (data == NULL)
6248 return -ENOMEM;
6249 if (IS_SETLKW(cmd))
6250 data->arg.block = 1;
a9c92d6b 6251 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 6252 msg.rpc_argp = &data->arg;
6253 msg.rpc_resp = &data->res;
c970aa85 6254 task_setup_data.callback_data = data;
8fe72bac
TM		 6255 if (recovery_type > NFS_LOCK_NEW) {
6256 if (recovery_type == NFS_LOCK_RECLAIM)
6257 data->arg.reclaim = NFS_LOCK_RECLAIM;
6258 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 6259 } else
6260 data->arg.new_lock = 1;
c970aa85 6261 task = rpc_run_task(&task_setup_data);
7a1218a2 6262 if (IS_ERR(task))
a5d16a4d 6263 return PTR_ERR(task);
a5d16a4d
TM		 6264 ret = nfs4_wait_for_completion_rpc_task(task);
6265 if (ret == 0) {
6266 ret = data->rpc_status;
2bee72a6
TM		 6267 if (ret)
6268 nfs4_handle_setlk_error(data->server, data->lsp,
6269 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 6270 } else
6271 data->cancelled = 1;
e6b3c4db 6272 rpc_put_task(task);
3110ff80 6273 dprintk("%s: done, ret = %d!\n", __func__, ret);
48c9579a 6274 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
a5d16a4d 6275 return ret;
1da177e4
LT		 6276}
6277
6278static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
6279{
202b50dc 6280 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6281 struct nfs4_exception exception = {
6282 .inode = state->inode,
6283 };
202b50dc
TM		 6284 int err;
6285
6286 do {
42a2d13e
TM		 6287 /* Cache the lock if possible... */
6288 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6289 return 0;
afe6c27c 6290 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 6291 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 6292 break;
6293 nfs4_handle_exception(server, err, &exception);
6294 } while (exception.retry);
6295 return err;
1da177e4
LT		 6296}
6297
6298static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
6299{
202b50dc 6300 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6301 struct nfs4_exception exception = {
6302 .inode = state->inode,
6303 };
202b50dc
TM		 6304 int err;
6305
6bfc93ef
TM		 6306 err = nfs4_set_lock_state(state, request);
6307 if (err != 0)
6308 return err;
f6de7a39 6309 if (!recover_lost_locks) {
ef1820f9
N		 6310 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
6311 return 0;
6312 }
202b50dc 6313 do {
42a2d13e
TM		 6314 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6315 return 0;
afe6c27c 6316 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 6317 switch (err) {
6318 default:
6319 goto out;
6320 case -NFS4ERR_GRACE:
6321 case -NFS4ERR_DELAY:
6322 nfs4_handle_exception(server, err, &exception);
6323 err = 0;
6324 }
202b50dc 6325 } while (exception.retry);
a9ed2e25 6326out:
202b50dc 6327 return err;
1da177e4
LT		 6328}
6329
f062eb6c 6330#if defined(CONFIG_NFS_V4_1)
b01dd1d8
BS		 6331static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6332{
c5896fc8
TM		 6333 struct nfs4_lock_state *lsp;
6334 int status;
b01dd1d8 6335
c5896fc8
TM		 6336 status = nfs4_set_lock_state(state, request);
6337 if (status != 0)
6338 return status;
6339 lsp = request->fl_u.nfs4_fl.owner;
6340 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) ||
6341 test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
6342 return 0;
6343 status = nfs4_lock_expired(state, request);
eb64cf96 6344 return status;
f062eb6c
BS		 6345}
6346#endif
6347
1da177e4
LT		 6348static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6349{
19e03c57 6350 struct nfs_inode *nfsi = NFS_I(state->inode);
11476e9d 6351 struct nfs4_state_owner *sp = state->owner;
01c3b861 6352 unsigned char fl_flags = request->fl_flags;
1ea67dbd 6353 int status;
1da177e4 6354
01c3b861 6355 request->fl_flags |= FL_ACCESS;
75575ddf 6356 status = locks_lock_inode_wait(state->inode, request);
01c3b861
TM		 6357 if (status < 0)
6358 goto out;
11476e9d 6359 mutex_lock(&sp->so_delegreturn_mutex);
19e03c57 6360 down_read(&nfsi->rwsem);
01c3b861 6361 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6362 /* Yes: cache locks! */
01c3b861 6363 /* ...but avoid races with delegation recall... */
19e03c57 6364 request->fl_flags = fl_flags & ~FL_SLEEP;
75575ddf 6365 status = locks_lock_inode_wait(state->inode, request);
c69899a1 6366 up_read(&nfsi->rwsem);
11476e9d 6367 mutex_unlock(&sp->so_delegreturn_mutex);
9a99af49 6368 goto out;
9a99af49 6369 }
19e03c57 6370 up_read(&nfsi->rwsem);
11476e9d 6371 mutex_unlock(&sp->so_delegreturn_mutex);
c69899a1 6372 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6373out:
6374 request->fl_flags = fl_flags;
1da177e4
LT		 6375 return status;
6376}
6377
6378static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6379{
a1d0b5ee
TM		 6380 struct nfs4_exception exception = {
6381 .state = state,
05ffe24f 6382 .inode = state->inode,
a1d0b5ee 6383 };
1da177e4
LT		 6384 int err;
6385
6386 do {
965b5d67
TM		 6387 err = _nfs4_proc_setlk(state, cmd, request);
6388 if (err == -NFS4ERR_DENIED)
6389 err = -EAGAIN;
1da177e4 6390 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6391 err, &exception);
1da177e4
LT		 6392 } while (exception.retry);
6393 return err;
6394}
6395
d2f3a7f9
JL		 6396#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
6397#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
6398
6399static int
a1d617d8
JL		 6400nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd,
6401 struct file_lock *request)
d2f3a7f9
JL		 6402{
6403 int status = -ERESTARTSYS;
6404 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6405
6406 while(!signalled()) {
6407 status = nfs4_proc_setlk(state, cmd, request);
6408 if ((status != -EAGAIN) || IS_SETLK(cmd))
6409 break;
6410 freezable_schedule_timeout_interruptible(timeout);
6411 timeout *= 2;
6412 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout);
6413 status = -ERESTARTSYS;
6414 }
6415 return status;
6416}
6417
a1d617d8
JL		 6418#ifdef CONFIG_NFS_V4_1
6419struct nfs4_lock_waiter {
6420 struct task_struct *task;
6421 struct inode *inode;
6422 struct nfs_lowner *owner;
6423 bool notified;
6424};
6425
6426static int
6427nfs4_wake_lock_waiter(wait_queue_t *wait, unsigned int mode, int flags, void *key)
6428{
6429 int ret;
6430 struct cb_notify_lock_args *cbnl = key;
6431 struct nfs4_lock_waiter *waiter = wait->private;
6432 struct nfs_lowner *lowner = &cbnl->cbnl_owner,
6433 *wowner = waiter->owner;
6434
6435 /* Only wake if the callback was for the same owner */
6436 if (lowner->clientid != wowner->clientid ||
6437 lowner->id != wowner->id ||
6438 lowner->s_dev != wowner->s_dev)
6439 return 0;
6440
6441 /* Make sure it's for the right inode */
6442 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
6443 return 0;
6444
6445 waiter->notified = true;
6446
6447 /* override "private" so we can use default_wake_function */
6448 wait->private = waiter->task;
6449 ret = autoremove_wake_function(wait, mode, flags, key);
6450 wait->private = waiter;
6451 return ret;
6452}
6453
6454static int
6455nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6456{
6457 int status = -ERESTARTSYS;
6458 unsigned long flags;
6459 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
6460 struct nfs_server *server = NFS_SERVER(state->inode);
6461 struct nfs_client *clp = server->nfs_client;
6462 wait_queue_head_t *q = &clp->cl_lock_waitq;
6463 struct nfs_lowner owner = { .clientid = clp->cl_clientid,
6464 .id = lsp->ls_seqid.owner_id,
6465 .s_dev = server->s_dev };
6466 struct nfs4_lock_waiter waiter = { .task = current,
6467 .inode = state->inode,
6468 .owner = &owner,
6469 .notified = false };
6470 wait_queue_t wait;
6471
6472 /* Don't bother with waitqueue if we don't expect a callback */
6473 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags))
6474 return nfs4_retry_setlk_simple(state, cmd, request);
6475
6476 init_wait(&wait);
6477 wait.private = &waiter;
6478 wait.func = nfs4_wake_lock_waiter;
6479 add_wait_queue(q, &wait);
6480
6481 while(!signalled()) {
6482 status = nfs4_proc_setlk(state, cmd, request);
6483 if ((status != -EAGAIN) || IS_SETLK(cmd))
6484 break;
6485
6486 status = -ERESTARTSYS;
6487 spin_lock_irqsave(&q->lock, flags);
6488 if (waiter.notified) {
6489 spin_unlock_irqrestore(&q->lock, flags);
6490 continue;
6491 }
6492 set_current_state(TASK_INTERRUPTIBLE);
6493 spin_unlock_irqrestore(&q->lock, flags);
6494
6495 freezable_schedule_timeout_interruptible(NFS4_LOCK_MAXTIMEOUT);
6496 }
6497
6498 finish_wait(q, &wait);
6499 return status;
6500}
6501#else /* !CONFIG_NFS_V4_1 */
6502static inline int
6503nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6504{
6505 return nfs4_retry_setlk_simple(state, cmd, request);
6506}
6507#endif
6508
1da177e4
LT		 6509static int
6510nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6511{
6512 struct nfs_open_context *ctx;
6513 struct nfs4_state *state;
1da177e4
LT		 6514 int status;
6515
6516 /* verify open state */
cd3758e3 6517 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6518 state = ctx->state;
6519
6520 if (request->fl_start < 0 || request->fl_end < 0)
6521 return -EINVAL;
6522
d953126a
TM		 6523 if (IS_GETLK(cmd)) {
6524 if (state != NULL)
6525 return nfs4_proc_getlk(state, F_GETLK, request);
6526 return 0;
6527 }
1da177e4
LT		 6528
6529 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6530 return -EINVAL;
6531
d953126a
TM		 6532 if (request->fl_type == F_UNLCK) {
6533 if (state != NULL)
6534 return nfs4_proc_unlck(state, cmd, request);
6535 return 0;
6536 }
1da177e4 6537
d953126a
TM		 6538 if (state == NULL)
6539 return -ENOLCK;
1ea67dbd
JL		 6540
6541 if ((request->fl_flags & FL_POSIX) &&
6542 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6543 return -ENOLCK;
6544
55725513
TM		 6545 /*
6546 * Don't rely on the VFS having checked the file open mode,
6547 * since it won't do this for flock() locks.
6548 */
f44106e2 6549 switch (request->fl_type) {
55725513
TM		 6550 case F_RDLCK:
6551 if (!(filp->f_mode & FMODE_READ))
6552 return -EBADF;
6553 break;
6554 case F_WRLCK:
6555 if (!(filp->f_mode & FMODE_WRITE))
6556 return -EBADF;
6557 }
6558
1ea67dbd
JL		 6559 status = nfs4_set_lock_state(state, request);
6560 if (status != 0)
6561 return status;
6562
d2f3a7f9 6563 return nfs4_retry_setlk(state, cmd, request);
1da177e4
LT		 6564}
6565
db4f2e63 6566int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6567{
6568 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6569 int err;
6570
6571 err = nfs4_set_lock_state(state, fl);
6572 if (err != 0)
db4f2e63 6573 return err;
4a706fa0 6574 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6575 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6576}
6b3b5496 6577
cf470c3e
TM		 6578struct nfs_release_lockowner_data {
6579 struct nfs4_lock_state *lsp;
5ae67c4f 6580 struct nfs_server *server;
cf470c3e 6581 struct nfs_release_lockowner_args args;
b7e63a10 6582 struct nfs_release_lockowner_res res;
60ea6812 6583 unsigned long timestamp;
cf470c3e
TM		 6584};
6585
fbd4bfd1
CL		 6586static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6587{
6588 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6589 struct nfs_server *server = data->server;
cb04ad2a
PT		 6590 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6591 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6592 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6593 data->timestamp = jiffies;
fbd4bfd1
CL		 6594}
6595
6596static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6597{
6598 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6599 struct nfs_server *server = data->server;
6600
b7e63a10 6601 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6602
6603 switch (task->tk_status) {
6604 case 0:
6605 renew_lease(server, data->timestamp);
6606 break;
6607 case -NFS4ERR_STALE_CLIENTID:
6608 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6609 nfs4_schedule_lease_recovery(server->nfs_client);
6610 break;
60ea6812
CL		 6611 case -NFS4ERR_LEASE_MOVED:
6612 case -NFS4ERR_DELAY:
8478eaa1
N		 6613 if (nfs4_async_handle_error(task, server,
6614 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6615 rpc_restart_call_prepare(task);
6616 }
fbd4bfd1
CL		 6617}
6618
d3c7b7cc
TM		 6619static void nfs4_release_lockowner_release(void *calldata)
6620{
cf470c3e 6621 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6622 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6623 kfree(calldata);
6624}
6625
17280175 6626static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6627 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6628 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6629 .rpc_release = nfs4_release_lockowner_release,
6630};
6631
f1cdae87
JL		 6632static void
6633nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6634{
cf470c3e 6635 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6636 struct rpc_message msg = {
6637 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6638 };
6639
6640 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6641 return;
fbd4bfd1 6642
cf470c3e
TM		 6643 data = kmalloc(sizeof(*data), GFP_NOFS);
6644 if (!data)
f1cdae87 6645 return;
cf470c3e 6646 data->lsp = lsp;
5ae67c4f 6647 data->server = server;
cf470c3e
TM		 6648 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6649 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6650 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6651
cf470c3e 6652 msg.rpc_argp = &data->args;
b7e63a10
TM		 6653 msg.rpc_resp = &data->res;
6654 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6655 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6656}
6657
aa1870af
BF		 6658#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6659
d9a82a04 6660static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
59301226
AV		 6661 struct dentry *unused, struct inode *inode,
6662 const char *key, const void *buf,
6663 size_t buflen, int flags)
6b3b5496 6664{
59301226 6665 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 6666}
6667
d9a82a04 6668static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
b296821a
AV		 6669 struct dentry *unused, struct inode *inode,
6670 const char *key, void *buf, size_t buflen)
6b3b5496 6671{
b296821a 6672 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 6673}
6674
764a5c6b 6675static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6b3b5496 6676{
764a5c6b 6677 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6b3b5496
BF		 6678}
6679
c9bccef6 6680#ifdef CONFIG_NFS_V4_SECURITY_LABEL
c9bccef6 6681
d9a82a04 6682static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
59301226
AV		 6683 struct dentry *unused, struct inode *inode,
6684 const char *key, const void *buf,
6685 size_t buflen, int flags)
c9bccef6
DQ		 6686{
6687 if (security_ismaclabel(key))
59301226 6688 return nfs4_set_security_label(inode, buf, buflen);
c9bccef6
DQ		 6689
6690 return -EOPNOTSUPP;
6691}
6692
d9a82a04 6693static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
b296821a
AV		 6694 struct dentry *unused, struct inode *inode,
6695 const char *key, void *buf, size_t buflen)
c9bccef6
DQ		 6696{
6697 if (security_ismaclabel(key))
b296821a 6698 return nfs4_get_security_label(inode, buf, buflen);
c9bccef6
DQ		 6699 return -EOPNOTSUPP;
6700}
6701
c4803c49
AG		 6702static ssize_t
6703nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
c9bccef6 6704{
c4803c49 6705 int len = 0;
c9bccef6 6706
c4803c49
AG		 6707 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
6708 len = security_inode_listsecurity(inode, list, list_len);
6709 if (list_len && len > list_len)
6710 return -ERANGE;
c9bccef6
DQ		 6711 }
6712 return len;
6713}
6714
6715static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6716 .prefix = XATTR_SECURITY_PREFIX,
c9bccef6
DQ		 6717 .get = nfs4_xattr_get_nfs4_label,
6718 .set = nfs4_xattr_set_nfs4_label,
6719};
c9bccef6 6720
c4803c49
AG		 6721#else
6722
6723static ssize_t
6724nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6725{
6726 return 0;
6727}
6728
6729#endif
c9bccef6 6730
533eb461
AA		 6731/*
6732 * nfs_fhget will use either the mounted_on_fileid or the fileid
6733 */
69aaaae1
TM		 6734static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6735{
533eb461
AA		 6736 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6737 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6738 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6739 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6740 return;
6741
6742 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6743 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6744 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6745 fattr->nlink = 2;
6746}
6747
f05d147f
BS		 6748static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6749 const struct qstr *name,
6750 struct nfs4_fs_locations *fs_locations,
6751 struct page *page)
683b57b4
TM		 6752{
6753 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6754 u32 bitmask[3] = {
361e624f 6755 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6756 };
6757 struct nfs4_fs_locations_arg args = {
6758 .dir_fh = NFS_FH(dir),
c228fd3a 6759 .name = name,
683b57b4
TM		 6760 .page = page,
6761 .bitmask = bitmask,
6762 };
22958463
BH		 6763 struct nfs4_fs_locations_res res = {
6764 .fs_locations = fs_locations,
6765 };
683b57b4
TM		 6766 struct rpc_message msg = {
6767 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6768 .rpc_argp = &args,
22958463 6769 .rpc_resp = &res,
683b57b4
TM		 6770 };
6771 int status;
6772
3110ff80 6773 dprintk("%s: start\n", __func__);
533eb461
AA		 6774
6775 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6776 * is not supported */
6777 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6778 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6779 else
6780 bitmask[0] |= FATTR4_WORD0_FILEID;
6781
c228fd3a 6782 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6783 fs_locations->server = server;
830b8e33 6784 fs_locations->nlocations = 0;
f05d147f 6785 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6786 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6787 return status;
6788}
6789
f05d147f
BS		 6790int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6791 const struct qstr *name,
6792 struct nfs4_fs_locations *fs_locations,
6793 struct page *page)
db0a9593
BS		 6794{
6795 struct nfs4_exception exception = { };
6796 int err;
6797 do {
078ea3df
TM		 6798 err = _nfs4_proc_fs_locations(client, dir, name,
6799 fs_locations, page);
6800 trace_nfs4_get_fs_locations(dir, name, err);
6801 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6802 &exception);
6803 } while (exception.retry);
6804 return err;
6805}
6806
b03d735b
CL		 6807/*
6808 * This operation also signals the server that this client is
6809 * performing migration recovery. The server can stop returning
6810 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6811 * appended to this compound to identify the client ID which is
6812 * performing recovery.
6813 */
6814static int _nfs40_proc_get_locations(struct inode *inode,
6815 struct nfs4_fs_locations *locations,
6816 struct page *page, struct rpc_cred *cred)
6817{
6818 struct nfs_server *server = NFS_SERVER(inode);
6819 struct rpc_clnt *clnt = server->client;
6820 u32 bitmask[2] = {
6821 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6822 };
6823 struct nfs4_fs_locations_arg args = {
6824 .clientid = server->nfs_client->cl_clientid,
6825 .fh = NFS_FH(inode),
6826 .page = page,
6827 .bitmask = bitmask,
6828 .migration = 1, /* skip LOOKUP */
6829 .renew = 1, /* append RENEW */
6830 };
6831 struct nfs4_fs_locations_res res = {
6832 .fs_locations = locations,
6833 .migration = 1,
6834 .renew = 1,
6835 };
6836 struct rpc_message msg = {
6837 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6838 .rpc_argp = &args,
6839 .rpc_resp = &res,
6840 .rpc_cred = cred,
6841 };
6842 unsigned long now = jiffies;
6843 int status;
6844
6845 nfs_fattr_init(&locations->fattr);
6846 locations->server = server;
6847 locations->nlocations = 0;
6848
6849 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6850 nfs4_set_sequence_privileged(&args.seq_args);
6851 status = nfs4_call_sync_sequence(clnt, server, &msg,
6852 &args.seq_args, &res.seq_res);
6853 if (status)
6854 return status;
6855
6856 renew_lease(server, now);
6857 return 0;
6858}
6859
6860#ifdef CONFIG_NFS_V4_1
6861
6862/*
6863 * This operation also signals the server that this client is
6864 * performing migration recovery. The server can stop asserting
6865 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6866 * performing this operation is identified in the SEQUENCE
6867 * operation in this compound.
6868 *
6869 * When the client supports GETATTR(fs_locations_info), it can
6870 * be plumbed in here.
6871 */
6872static int _nfs41_proc_get_locations(struct inode *inode,
6873 struct nfs4_fs_locations *locations,
6874 struct page *page, struct rpc_cred *cred)
6875{
6876 struct nfs_server *server = NFS_SERVER(inode);
6877 struct rpc_clnt *clnt = server->client;
6878 u32 bitmask[2] = {
6879 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6880 };
6881 struct nfs4_fs_locations_arg args = {
6882 .fh = NFS_FH(inode),
6883 .page = page,
6884 .bitmask = bitmask,
6885 .migration = 1, /* skip LOOKUP */
6886 };
6887 struct nfs4_fs_locations_res res = {
6888 .fs_locations = locations,
6889 .migration = 1,
6890 };
6891 struct rpc_message msg = {
6892 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6893 .rpc_argp = &args,
6894 .rpc_resp = &res,
6895 .rpc_cred = cred,
6896 };
6897 int status;
6898
6899 nfs_fattr_init(&locations->fattr);
6900 locations->server = server;
6901 locations->nlocations = 0;
6902
6903 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6904 nfs4_set_sequence_privileged(&args.seq_args);
6905 status = nfs4_call_sync_sequence(clnt, server, &msg,
6906 &args.seq_args, &res.seq_res);
6907 if (status == NFS4_OK &&
6908 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6909 status = -NFS4ERR_LEASE_MOVED;
6910 return status;
6911}
6912
6913#endif /* CONFIG_NFS_V4_1 */
6914
6915/**
6916 * nfs4_proc_get_locations - discover locations for a migrated FSID
6917 * @inode: inode on FSID that is migrating
6918 * @locations: result of query
6919 * @page: buffer
6920 * @cred: credential to use for this operation
6921 *
6922 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6923 * operation failed, or a negative errno if a local error occurred.
6924 *
6925 * On success, "locations" is filled in, but if the server has
6926 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6927 * asserted.
6928 *
6929 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6930 * from this client that require migration recovery.
6931 */
6932int nfs4_proc_get_locations(struct inode *inode,
6933 struct nfs4_fs_locations *locations,
6934 struct page *page, struct rpc_cred *cred)
6935{
6936 struct nfs_server *server = NFS_SERVER(inode);
6937 struct nfs_client *clp = server->nfs_client;
6938 const struct nfs4_mig_recovery_ops *ops =
6939 clp->cl_mvops->mig_recovery_ops;
6940 struct nfs4_exception exception = { };
6941 int status;
6942
6943 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6944 (unsigned long long)server->fsid.major,
6945 (unsigned long long)server->fsid.minor,
6946 clp->cl_hostname);
6947 nfs_display_fhandle(NFS_FH(inode), __func__);
6948
6949 do {
6950 status = ops->get_locations(inode, locations, page, cred);
6951 if (status != -NFS4ERR_DELAY)
6952 break;
6953 nfs4_handle_exception(server, status, &exception);
6954 } while (exception.retry);
6955 return status;
6956}
6957
44c99933
CL		 6958/*
6959 * This operation also signals the server that this client is
6960 * performing "lease moved" recovery. The server can stop
6961 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6962 * is appended to this compound to identify the client ID which is
6963 * performing recovery.
6964 */
6965static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6966{
6967 struct nfs_server *server = NFS_SERVER(inode);
6968 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6969 struct rpc_clnt *clnt = server->client;
6970 struct nfs4_fsid_present_arg args = {
6971 .fh = NFS_FH(inode),
6972 .clientid = clp->cl_clientid,
6973 .renew = 1, /* append RENEW */
6974 };
6975 struct nfs4_fsid_present_res res = {
6976 .renew = 1,
6977 };
6978 struct rpc_message msg = {
6979 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6980 .rpc_argp = &args,
6981 .rpc_resp = &res,
6982 .rpc_cred = cred,
6983 };
6984 unsigned long now = jiffies;
6985 int status;
6986
6987 res.fh = nfs_alloc_fhandle();
6988 if (res.fh == NULL)
6989 return -ENOMEM;
6990
6991 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6992 nfs4_set_sequence_privileged(&args.seq_args);
6993 status = nfs4_call_sync_sequence(clnt, server, &msg,
6994 &args.seq_args, &res.seq_res);
6995 nfs_free_fhandle(res.fh);
6996 if (status)
6997 return status;
6998
6999 do_renew_lease(clp, now);
7000 return 0;
7001}
7002
7003#ifdef CONFIG_NFS_V4_1
7004
7005/*
7006 * This operation also signals the server that this client is
7007 * performing "lease moved" recovery. The server can stop asserting
7008 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
7009 * this operation is identified in the SEQUENCE operation in this
7010 * compound.
7011 */
7012static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7013{
7014 struct nfs_server *server = NFS_SERVER(inode);
7015 struct rpc_clnt *clnt = server->client;
7016 struct nfs4_fsid_present_arg args = {
7017 .fh = NFS_FH(inode),
7018 };
7019 struct nfs4_fsid_present_res res = {
7020 };
7021 struct rpc_message msg = {
7022 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
7023 .rpc_argp = &args,
7024 .rpc_resp = &res,
7025 .rpc_cred = cred,
7026 };
7027 int status;
7028
7029 res.fh = nfs_alloc_fhandle();
7030 if (res.fh == NULL)
7031 return -ENOMEM;
7032
7033 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
7034 nfs4_set_sequence_privileged(&args.seq_args);
7035 status = nfs4_call_sync_sequence(clnt, server, &msg,
7036 &args.seq_args, &res.seq_res);
7037 nfs_free_fhandle(res.fh);
7038 if (status == NFS4_OK &&
7039 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
7040 status = -NFS4ERR_LEASE_MOVED;
7041 return status;
7042}
7043
7044#endif /* CONFIG_NFS_V4_1 */
7045
7046/**
7047 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
7048 * @inode: inode on FSID to check
7049 * @cred: credential to use for this operation
7050 *
7051 * Server indicates whether the FSID is present, moved, or not
7052 * recognized. This operation is necessary to clear a LEASE_MOVED
7053 * condition for this client ID.
7054 *
7055 * Returns NFS4_OK if the FSID is present on this server,
7056 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
7057 * NFS4ERR code if some error occurred on the server, or a
7058 * negative errno if a local failure occurred.
7059 */
7060int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7061{
7062 struct nfs_server *server = NFS_SERVER(inode);
7063 struct nfs_client *clp = server->nfs_client;
7064 const struct nfs4_mig_recovery_ops *ops =
7065 clp->cl_mvops->mig_recovery_ops;
7066 struct nfs4_exception exception = { };
7067 int status;
7068
7069 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
7070 (unsigned long long)server->fsid.major,
7071 (unsigned long long)server->fsid.minor,
7072 clp->cl_hostname);
7073 nfs_display_fhandle(NFS_FH(inode), __func__);
7074
7075 do {
7076 status = ops->fsid_present(inode, cred);
7077 if (status != -NFS4ERR_DELAY)
7078 break;
7079 nfs4_handle_exception(server, status, &exception);
7080 } while (exception.retry);
7081 return status;
7082}
7083
5ec16a85 7084/**
a5250def
WAA		 7085 * If 'use_integrity' is true and the state managment nfs_client
7086 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
7087 * and the machine credential as per RFC3530bis and RFC5661 Security
7088 * Considerations sections. Otherwise, just use the user cred with the
7089 * filesystem's rpc_client.
5ec16a85 7090 */
a5250def 7091static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 7092{
7093 int status;
7094 struct nfs4_secinfo_arg args = {
7095 .dir_fh = NFS_FH(dir),
7096 .name = name,
7097 };
7098 struct nfs4_secinfo_res res = {
7099 .flavors = flavors,
7100 };
7101 struct rpc_message msg = {
7102 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
7103 .rpc_argp = &args,
7104 .rpc_resp = &res,
7105 };
a5250def 7106 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 7107 struct rpc_cred *cred = NULL;
a5250def
WAA		 7108
7109 if (use_integrity) {
7110 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 7111 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
7112 msg.rpc_cred = cred;
a5250def 7113 }
5a5ea0d4
BS		 7114
7115 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 7116
7117 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
7118 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
7119
a5250def
WAA		 7120 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
7121 &res.seq_res, 0);
5a5ea0d4 7122 dprintk("NFS reply secinfo: %d\n", status);
a5250def 7123
7cb852df
WAA		 7124 if (cred)
7125 put_rpccred(cred);
a5250def 7126
5a5ea0d4
BS		 7127 return status;
7128}
7129
72de53ec
BS		 7130int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
7131 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 7132{
7133 struct nfs4_exception exception = { };
7134 int err;
7135 do {
a5250def
WAA		 7136 err = -NFS4ERR_WRONGSEC;
7137
7138 /* try to use integrity protection with machine cred */
7139 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
7140 err = _nfs4_proc_secinfo(dir, name, flavors, true);
7141
7142 /*
7143 * if unable to use integrity protection, or SECINFO with
7144 * integrity protection returns NFS4ERR_WRONGSEC (which is
7145 * disallowed by spec, but exists in deployed servers) use
7146 * the current filesystem's rpc_client and the user cred.
7147 */
7148 if (err == -NFS4ERR_WRONGSEC)
7149 err = _nfs4_proc_secinfo(dir, name, flavors, false);
7150
078ea3df
TM		 7151 trace_nfs4_secinfo(dir, name, err);
7152 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 7153 &exception);
7154 } while (exception.retry);
7155 return err;
7156}
7157
557134a3 7158#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 7159/*
7160 * Check the exchange flags returned by the server for invalid flags, having
7161 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
7162 * DS flags set.
7163 */
7164static int nfs4_check_cl_exchange_flags(u32 flags)
7165{
7166 if (flags & ~EXCHGID4_FLAG_MASK_R)
7167 goto out_inval;
7168 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
7169 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
7170 goto out_inval;
7171 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
7172 goto out_inval;
7173 return NFS_OK;
7174out_inval:
7175 return -NFS4ERR_INVAL;
7176}
7177
78fe0f41 7178static bool
79d4e1f0
CL		 7179nfs41_same_server_scope(struct nfs41_server_scope *a,
7180 struct nfs41_server_scope *b)
78fe0f41
WAA		 7181{
7182 if (a->server_scope_sz == b->server_scope_sz &&
7183 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
7184 return true;
7185
7186 return false;
7187}
7188
02a95dee
AA		 7189static void
7190nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
7191{
7192}
7193
7194static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
7195 .rpc_call_done = &nfs4_bind_one_conn_to_session_done,
7196};
7197
7c44f1ae 7198/*
d9ddbf5d 7199 * nfs4_proc_bind_one_conn_to_session()
7c44f1ae
WAA		 7200 *
7201 * The 4.1 client currently uses the same TCP connection for the
7202 * fore and backchannel.
7203 */
d9ddbf5d
TM		 7204static
7205int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
7206 struct rpc_xprt *xprt,
7207 struct nfs_client *clp,
7208 struct rpc_cred *cred)
7c44f1ae
WAA		 7209{
7210 int status;
71a097c6
TM		 7211 struct nfs41_bind_conn_to_session_args args = {
7212 .client = clp,
7213 .dir = NFS4_CDFC4_FORE_OR_BOTH,
7214 };
7c44f1ae
WAA		 7215 struct nfs41_bind_conn_to_session_res res;
7216 struct rpc_message msg = {
7217 .rpc_proc =
7218 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 7219 .rpc_argp = &args,
7c44f1ae 7220 .rpc_resp = &res,
2cf047c9 7221 .rpc_cred = cred,
7c44f1ae 7222 };
d9ddbf5d
TM		 7223 struct rpc_task_setup task_setup_data = {
7224 .rpc_client = clnt,
7225 .rpc_xprt = xprt,
02a95dee 7226 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
d9ddbf5d
TM		 7227 .rpc_message = &msg,
7228 .flags = RPC_TASK_TIMEOUT,
7229 };
7230 struct rpc_task *task;
7c44f1ae
WAA		 7231
7232 dprintk("--> %s\n", __func__);
7c44f1ae 7233
71a097c6
TM		 7234 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
7235 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
7236 args.dir = NFS4_CDFC4_FORE;
7c44f1ae 7237
d9ddbf5d
TM		 7238 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
7239 if (xprt != rcu_access_pointer(clnt->cl_xprt))
7240 args.dir = NFS4_CDFC4_FORE;
7241
7242 task = rpc_run_task(&task_setup_data);
7243 if (!IS_ERR(task)) {
7244 status = task->tk_status;
7245 rpc_put_task(task);
7246 } else
7247 status = PTR_ERR(task);
c6d01c6f 7248 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 7249 if (status == 0) {
71a097c6 7250 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 7251 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
7252 dprintk("NFS: %s: Session ID mismatch\n", __func__);
7253 status = -EIO;
71a097c6 7254 goto out;
7c44f1ae 7255 }
71a097c6 7256 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 7257 dprintk("NFS: %s: Unexpected direction from server\n",
7258 __func__);
7259 status = -EIO;
71a097c6 7260 goto out;
7c44f1ae 7261 }
71a097c6 7262 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 7263 dprintk("NFS: %s: Server returned RDMA mode = true\n",
7264 __func__);
7265 status = -EIO;
71a097c6 7266 goto out;
7c44f1ae
WAA		 7267 }
7268 }
7c44f1ae
WAA		 7269out:
7270 dprintk("<-- %s status= %d\n", __func__, status);
7271 return status;
7272}
7273
d9ddbf5d
TM		 7274struct rpc_bind_conn_calldata {
7275 struct nfs_client *clp;
7276 struct rpc_cred *cred;
7277};
7278
7279static int
7280nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
7281 struct rpc_xprt *xprt,
7282 void *calldata)
7283{
7284 struct rpc_bind_conn_calldata *p = calldata;
7285
7286 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
7287}
7288
7289int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7290{
7291 struct rpc_bind_conn_calldata data = {
7292 .clp = clp,
7293 .cred = cred,
7294 };
7295 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
7296 nfs4_proc_bind_conn_to_session_callback, &data);
7297}
7298
99fe60d0 7299/*
fa940720
WAA		 7300 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
7301 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 7302 */
7303static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
7304 .how = SP4_MACH_CRED,
7305 .enforce.u.words = {
7306 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7307 1 << (OP_EXCHANGE_ID - 32) |
7308 1 << (OP_CREATE_SESSION - 32) |
7309 1 << (OP_DESTROY_SESSION - 32) |
7310 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 7311 },
7312 .allow.u.words = {
7313 [0] = 1 << (OP_CLOSE) |
99ade3c7 7314 1 << (OP_OPEN_DOWNGRADE) |
a0279625 7315 1 << (OP_LOCKU) |
99ade3c7 7316 1 << (OP_DELEGRETURN) |
a0279625 7317 1 << (OP_COMMIT),
8b5bee2e 7318 [1] = 1 << (OP_SECINFO - 32) |
3787d506 7319 1 << (OP_SECINFO_NO_NAME - 32) |
99ade3c7 7320 1 << (OP_LAYOUTRETURN - 32) |
3787d506 7321 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 7322 1 << (OP_FREE_STATEID - 32) |
7323 1 << (OP_WRITE - 32)
2031cd1a
WAA		 7324 }
7325};
7326
7327/*
7328 * Select the state protection mode for client `clp' given the server results
7329 * from exchange_id in `sp'.
99fe60d0 7330 *
2031cd1a
WAA		 7331 * Returns 0 on success, negative errno otherwise.
7332 */
7333static int nfs4_sp4_select_mode(struct nfs_client *clp,
7334 struct nfs41_state_protection *sp)
7335{
7336 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
7337 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7338 1 << (OP_EXCHANGE_ID - 32) |
7339 1 << (OP_CREATE_SESSION - 32) |
7340 1 << (OP_DESTROY_SESSION - 32) |
7341 1 << (OP_DESTROY_CLIENTID - 32)
7342 };
7343 unsigned int i;
7344
7345 if (sp->how == SP4_MACH_CRED) {
7346 /* Print state protect result */
7347 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
7348 for (i = 0; i <= LAST_NFS4_OP; i++) {
7349 if (test_bit(i, sp->enforce.u.longs))
7350 dfprintk(MOUNT, " enforce op %d\n", i);
7351 if (test_bit(i, sp->allow.u.longs))
7352 dfprintk(MOUNT, " allow op %d\n", i);
7353 }
7354
7355 /* make sure nothing is on enforce list that isn't supported */
7356 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
7357 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
7358 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7359 return -EINVAL;
7360 }
7361 }
7362
7363 /*
7364 * Minimal mode - state operations are allowed to use machine
7365 * credential. Note this already happens by default, so the
7366 * client doesn't have to do anything more than the negotiation.
7367 *
7368 * NOTE: we don't care if EXCHANGE_ID is in the list -
7369 * we're already using the machine cred for exchange_id
7370 * and will never use a different cred.
7371 */
7372 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
7373 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
7374 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
7375 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
7376 dfprintk(MOUNT, "sp4_mach_cred:\n");
7377 dfprintk(MOUNT, " minimal mode enabled\n");
7378 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
7379 } else {
7380 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7381 return -EINVAL;
7382 }
fa940720
WAA		 7383
7384 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
99ade3c7
AE		 7385 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
7386 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
fa940720
WAA		 7387 test_bit(OP_LOCKU, sp->allow.u.longs)) {
7388 dfprintk(MOUNT, " cleanup mode enabled\n");
7389 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
7390 }
8b5bee2e 7391
99ade3c7
AE		 7392 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
7393 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
7394 set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP,
7395 &clp->cl_sp4_flags);
7396 }
7397
8b5bee2e
WAA		 7398 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
7399 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
7400 dfprintk(MOUNT, " secinfo mode enabled\n");
7401 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
7402 }
3787d506
WAA		 7403
7404 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
7405 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
7406 dfprintk(MOUNT, " stateid mode enabled\n");
7407 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
7408 }
8c21c62c
WAA		 7409
7410 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
7411 dfprintk(MOUNT, " write mode enabled\n");
7412 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
7413 }
7414
7415 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
7416 dfprintk(MOUNT, " commit mode enabled\n");
7417 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
7418 }
2031cd1a
WAA		 7419 }
7420
7421 return 0;
7422}
7423
8d89bd70
AA		 7424struct nfs41_exchange_id_data {
7425 struct nfs41_exchange_id_res res;
7426 struct nfs41_exchange_id_args args;
ad0849a7 7427 struct rpc_xprt *xprt;
8d89bd70
AA		 7428 int rpc_status;
7429};
7430
7431static void nfs4_exchange_id_done(struct rpc_task *task, void *data)
7432{
7433 struct nfs41_exchange_id_data *cdata =
7434 (struct nfs41_exchange_id_data *)data;
7435 struct nfs_client *clp = cdata->args.client;
7436 int status = task->tk_status;
7437
7438 trace_nfs4_exchange_id(clp, status);
7439
7440 if (status == 0)
7441 status = nfs4_check_cl_exchange_flags(cdata->res.flags);
ad0849a7
AA		 7442
7443 if (cdata->xprt && status == 0) {
7444 status = nfs4_detect_session_trunking(clp, &cdata->res,
7445 cdata->xprt);
7446 goto out;
7447 }
7448
8d89bd70
AA		 7449 if (status == 0)
7450 status = nfs4_sp4_select_mode(clp, &cdata->res.state_protect);
7451
7452 if (status == 0) {
7453 clp->cl_clientid = cdata->res.clientid;
7454 clp->cl_exchange_flags = cdata->res.flags;
7455 /* Client ID is not confirmed */
7456 if (!(cdata->res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7457 clear_bit(NFS4_SESSION_ESTABLISHED,
7458 &clp->cl_session->session_state);
7459 clp->cl_seqid = cdata->res.seqid;
7460 }
7461
7462 kfree(clp->cl_serverowner);
7463 clp->cl_serverowner = cdata->res.server_owner;
7464 cdata->res.server_owner = NULL;
7465
7466 /* use the most recent implementation id */
7467 kfree(clp->cl_implid);
7468 clp->cl_implid = cdata->res.impl_id;
7469 cdata->res.impl_id = NULL;
7470
7471 if (clp->cl_serverscope != NULL &&
7472 !nfs41_same_server_scope(clp->cl_serverscope,
7473 cdata->res.server_scope)) {
7474 dprintk("%s: server_scope mismatch detected\n",
7475 __func__);
7476 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
7477 kfree(clp->cl_serverscope);
7478 clp->cl_serverscope = NULL;
7479 }
7480
7481 if (clp->cl_serverscope == NULL) {
7482 clp->cl_serverscope = cdata->res.server_scope;
7483 cdata->res.server_scope = NULL;
7484 }
ad0849a7
AA		 7485 /* Save the EXCHANGE_ID verifier session trunk tests */
7486 memcpy(clp->cl_confirm.data, cdata->args.verifier->data,
7487 sizeof(clp->cl_confirm.data));
8d89bd70 7488 }
ad0849a7 7489out:
8d89bd70 7490 cdata->rpc_status = status;
ad0849a7 7491 return;
8d89bd70
AA		 7492}
7493
7494static void nfs4_exchange_id_release(void *data)
7495{
7496 struct nfs41_exchange_id_data *cdata =
7497 (struct nfs41_exchange_id_data *)data;
7498
7499 nfs_put_client(cdata->args.client);
ad0849a7
AA		 7500 if (cdata->xprt) {
7501 xprt_put(cdata->xprt);
7502 rpc_clnt_xprt_switch_put(cdata->args.client->cl_rpcclient);
7503 }
8d89bd70
AA		 7504 kfree(cdata->res.impl_id);
7505 kfree(cdata->res.server_scope);
7506 kfree(cdata->res.server_owner);
7507 kfree(cdata);
7508}
7509
7510static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
7511 .rpc_call_done = nfs4_exchange_id_done,
7512 .rpc_release = nfs4_exchange_id_release,
7513};
7514
2031cd1a
WAA		 7515/*
7516 * _nfs4_proc_exchange_id()
6bbb4ae8 7517 *
2031cd1a 7518 * Wrapper for EXCHANGE_ID operation.
99fe60d0 7519 */
2031cd1a 7520static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
ad0849a7 7521 u32 sp4_how, struct rpc_xprt *xprt)
99fe60d0
BH		 7522{
7523 nfs4_verifier verifier;
99fe60d0
BH		 7524 struct rpc_message msg = {
7525 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
99fe60d0
BH		 7526 .rpc_cred = cred,
7527 };
8d89bd70
AA		 7528 struct rpc_task_setup task_setup_data = {
7529 .rpc_client = clp->cl_rpcclient,
7530 .callback_ops = &nfs4_exchange_id_call_ops,
7531 .rpc_message = &msg,
7532 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
7533 };
7534 struct nfs41_exchange_id_data *calldata;
7535 struct rpc_task *task;
7536 int status = -EIO;
7537
7538 if (!atomic_inc_not_zero(&clp->cl_count))
7539 goto out;
7540
7541 status = -ENOMEM;
7542 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7543 if (!calldata)
7544 goto out;
99fe60d0 7545
ad0849a7
AA		 7546 if (!xprt)
7547 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 7548
7549 status = nfs4_init_uniform_client_string(clp);
7550 if (status)
8d89bd70 7551 goto out_calldata;
3a6bb738
JL		 7552
7553 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6bbb4ae8 7554 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 7555 clp->cl_owner_id);
99fe60d0 7556
8d89bd70
AA		 7557 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
7558 GFP_NOFS);
7559 status = -ENOMEM;
7560 if (unlikely(calldata->res.server_owner == NULL))
7561 goto out_calldata;
78fe0f41 7562
8d89bd70 7563 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 7564 GFP_NOFS);
8d89bd70 7565 if (unlikely(calldata->res.server_scope == NULL))
acdeb69d 7566 goto out_server_owner;
78fe0f41 7567
8d89bd70
AA		 7568 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
7569 if (unlikely(calldata->res.impl_id == NULL))
7d2ed9ac 7570 goto out_server_scope;
7d2ed9ac 7571
2031cd1a
WAA		 7572 switch (sp4_how) {
7573 case SP4_NONE:
8d89bd70 7574 calldata->args.state_protect.how = SP4_NONE;
2031cd1a
WAA		 7575 break;
7576
7577 case SP4_MACH_CRED:
8d89bd70 7578 calldata->args.state_protect = nfs4_sp4_mach_cred_request;
2031cd1a
WAA		 7579 break;
7580
7581 default:
7582 /* unsupported! */
7583 WARN_ON_ONCE(1);
7584 status = -EINVAL;
6b55970b 7585 goto out_impl_id;
2031cd1a 7586 }
ad0849a7
AA		 7587 if (xprt) {
7588 calldata->xprt = xprt;
7589 task_setup_data.rpc_xprt = xprt;
7590 task_setup_data.flags =
7591 RPC_TASK_SOFT|RPC_TASK_SOFTCONN|RPC_TASK_ASYNC;
7592 calldata->args.verifier = &clp->cl_confirm;
7593 } else {
7594 calldata->args.verifier = &verifier;
7595 }
8d89bd70
AA		 7596 calldata->args.client = clp;
7597#ifdef CONFIG_NFS_V4_1_MIGRATION
7598 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7599 EXCHGID4_FLAG_BIND_PRINC_STATEID |
7600 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
7601#else
7602 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7603 EXCHGID4_FLAG_BIND_PRINC_STATEID,
7604#endif
7605 msg.rpc_argp = &calldata->args;
7606 msg.rpc_resp = &calldata->res;
7607 task_setup_data.callback_data = calldata;
2031cd1a 7608
8d89bd70
AA		 7609 task = rpc_run_task(&task_setup_data);
7610 if (IS_ERR(task)) {
7611 status = PTR_ERR(task);
7612 goto out_impl_id;
6b55970b 7613 }
7d2ed9ac 7614
ad0849a7
AA		 7615 if (!xprt) {
7616 status = rpc_wait_for_completion_task(task);
7617 if (!status)
7618 status = calldata->rpc_status;
7619 } else /* session trunking test */
8d89bd70 7620 status = calldata->rpc_status;
ad0849a7 7621
8d89bd70 7622 rpc_put_task(task);
abe9a6d5 7623out:
177313f1 7624 if (clp->cl_implid != NULL)
6bbb4ae8 7625 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 7626 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 7627 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 7628 clp->cl_implid->date.seconds,
7629 clp->cl_implid->date.nseconds);
6bbb4ae8 7630 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0 7631 return status;
8d89bd70
AA		 7632
7633out_impl_id:
7634 kfree(calldata->res.impl_id);
7635out_server_scope:
7636 kfree(calldata->res.server_scope);
7637out_server_owner:
7638 kfree(calldata->res.server_owner);
7639out_calldata:
7640 kfree(calldata);
7641 goto out;
99fe60d0
BH		 7642}
7643
2031cd1a
WAA		 7644/*
7645 * nfs4_proc_exchange_id()
7646 *
7647 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7648 *
7649 * Since the clientid has expired, all compounds using sessions
7650 * associated with the stale clientid will be returning
7651 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7652 * be in some phase of session reset.
7653 *
7654 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7655 */
7656int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7657{
7658 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7659 int status;
7660
7661 /* try SP4_MACH_CRED if krb5i/p */
7662 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7663 authflavor == RPC_AUTH_GSS_KRB5P) {
ad0849a7 7664 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED, NULL);
2031cd1a
WAA		 7665 if (!status)
7666 return 0;
7667 }
7668
7669 /* try SP4_NONE */
ad0849a7 7670 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE, NULL);
2031cd1a
WAA		 7671}
7672
04fa2c6b
AA		 7673/**
7674 * nfs4_test_session_trunk
7675 *
7676 * This is an add_xprt_test() test function called from
7677 * rpc_clnt_setup_test_and_add_xprt.
7678 *
7679 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt
7680 * and is dereferrenced in nfs4_exchange_id_release
7681 *
7682 * Upon success, add the new transport to the rpc_clnt
7683 *
7684 * @clnt: struct rpc_clnt to get new transport
7685 * @xprt: the rpc_xprt to test
7686 * @data: call data for _nfs4_proc_exchange_id.
7687 */
7688int nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
7689 void *data)
7690{
7691 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data;
7692 u32 sp4_how;
7693
7694 dprintk("--> %s try %s\n", __func__,
7695 xprt->address_strings[RPC_DISPLAY_ADDR]);
7696
7697 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED);
7698
7699 /* Test connection for session trunking. Async exchange_id call */
7700 return _nfs4_proc_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
2031cd1a 7701}
04fa2c6b 7702EXPORT_SYMBOL_GPL(nfs4_test_session_trunk);
2031cd1a 7703
66245539
TM		 7704static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7705 struct rpc_cred *cred)
7706{
7707 struct rpc_message msg = {
7708 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7709 .rpc_argp = clp,
7710 .rpc_cred = cred,
7711 };
7712 int status;
7713
7714 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7715 trace_nfs4_destroy_clientid(clp, status);
66245539 7716 if (status)
02c67525 7717 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7718 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7719 return status;
7720}
7721
7722static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7723 struct rpc_cred *cred)
7724{
7725 unsigned int loop;
7726 int ret;
7727
7728 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7729 ret = _nfs4_proc_destroy_clientid(clp, cred);
7730 switch (ret) {
7731 case -NFS4ERR_DELAY:
7732 case -NFS4ERR_CLIENTID_BUSY:
7733 ssleep(1);
7734 break;
7735 default:
7736 return ret;
7737 }
7738 }
7739 return 0;
7740}
7741
7742int nfs4_destroy_clientid(struct nfs_client *clp)
7743{
7744 struct rpc_cred *cred;
7745 int ret = 0;
7746
7747 if (clp->cl_mvops->minor_version < 1)
7748 goto out;
7749 if (clp->cl_exchange_flags == 0)
7750 goto out;
05f4c350
CL		 7751 if (clp->cl_preserve_clid)
7752 goto out;
73d8bde5 7753 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7754 ret = nfs4_proc_destroy_clientid(clp, cred);
7755 if (cred)
7756 put_rpccred(cred);
7757 switch (ret) {
7758 case 0:
7759 case -NFS4ERR_STALE_CLIENTID:
7760 clp->cl_exchange_flags = 0;
7761 }
7762out:
7763 return ret;
7764}
7765
2050f0cc
AA		 7766struct nfs4_get_lease_time_data {
7767 struct nfs4_get_lease_time_args *args;
7768 struct nfs4_get_lease_time_res *res;
7769 struct nfs_client *clp;
7770};
7771
7772static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7773 void *calldata)
7774{
2050f0cc
AA		 7775 struct nfs4_get_lease_time_data *data =
7776 (struct nfs4_get_lease_time_data *)calldata;
7777
7778 dprintk("--> %s\n", __func__);
7779 /* just setup sequence, do not trigger session recovery
7780 since we're invoked within one */
d9afbd1b
TM		 7781 nfs41_setup_sequence(data->clp->cl_session,
7782 &data->args->la_seq_args,
7783 &data->res->lr_seq_res,
7784 task);
2050f0cc
AA		 7785 dprintk("<-- %s\n", __func__);
7786}
7787
7788/*
7789 * Called from nfs4_state_manager thread for session setup, so don't recover
7790 * from sequence operation or clientid errors.
7791 */
7792static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7793{
7794 struct nfs4_get_lease_time_data *data =
7795 (struct nfs4_get_lease_time_data *)calldata;
7796
7797 dprintk("--> %s\n", __func__);
14516c3a
TM		 7798 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7799 return;
2050f0cc
AA		 7800 switch (task->tk_status) {
7801 case -NFS4ERR_DELAY:
7802 case -NFS4ERR_GRACE:
7803 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7804 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7805 task->tk_status = 0;
a8a4ae3a
AA		 7806 /* fall through */
7807 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7808 rpc_restart_call_prepare(task);
2050f0cc
AA		 7809 return;
7810 }
2050f0cc
AA		 7811 dprintk("<-- %s\n", __func__);
7812}
7813
17280175 7814static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7815 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7816 .rpc_call_done = nfs4_get_lease_time_done,
7817};
7818
7819int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7820{
7821 struct rpc_task *task;
7822 struct nfs4_get_lease_time_args args;
7823 struct nfs4_get_lease_time_res res = {
7824 .lr_fsinfo = fsinfo,
7825 };
7826 struct nfs4_get_lease_time_data data = {
7827 .args = &args,
7828 .res = &res,
7829 .clp = clp,
7830 };
7831 struct rpc_message msg = {
7832 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7833 .rpc_argp = &args,
7834 .rpc_resp = &res,
7835 };
7836 struct rpc_task_setup task_setup = {
7837 .rpc_client = clp->cl_rpcclient,
7838 .rpc_message = &msg,
7839 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7840 .callback_data = &data,
7841 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7842 };
7843 int status;
7844
a9c92d6b 7845 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7846 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7847 dprintk("--> %s\n", __func__);
7848 task = rpc_run_task(&task_setup);
7849
7850 if (IS_ERR(task))
7851 status = PTR_ERR(task);
7852 else {
7853 status = task->tk_status;
7854 rpc_put_task(task);
7855 }
7856 dprintk("<-- %s return %d\n", __func__, status);
7857
7858 return status;
7859}
7860
fc931582
AA		 7861/*
7862 * Initialize the values to be used by the client in CREATE_SESSION
7863 * If nfs4_init_session set the fore channel request and response sizes,
7864 * use them.
7865 *
7866 * Set the back channel max_resp_sz_cached to zero to force the client to
7867 * always set csa_cachethis to FALSE because the current implementation
7868 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7869 */
6b26cc8c
CL		 7870static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
7871 struct rpc_clnt *clnt)
fc931582 7872{
18aad3d5 7873 unsigned int max_rqst_sz, max_resp_sz;
6b26cc8c 7874 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
18aad3d5
AA		 7875
7876 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7877 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7878
fc931582 7879 /* Fore channel attributes */
18aad3d5
AA		 7880 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7881 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7882 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7883 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7884
7885 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7886 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7887 __func__,
7888 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7889 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7890
7891 /* Back channel attributes */
6b26cc8c
CL		 7892 args->bc_attrs.max_rqst_sz = max_bc_payload;
7893 args->bc_attrs.max_resp_sz = max_bc_payload;
fc931582
AA		 7894 args->bc_attrs.max_resp_sz_cached = 0;
7895 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5405fc44 7896 args->bc_attrs.max_reqs = min_t(unsigned short, max_session_cb_slots, 1);
fc931582
AA		 7897
7898 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7899 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7900 __func__,
7901 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7902 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7903 args->bc_attrs.max_reqs);
7904}
7905
79969dd1
TM		 7906static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7907 struct nfs41_create_session_res *res)
8d35301d 7908{
43c2e885 7909 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7910 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7911
43c2e885
BF		 7912 if (rcvd->max_resp_sz > sent->max_resp_sz)
7913 return -EINVAL;
7914 /*
7915 * Our requested max_ops is the minimum we need; we're not
7916 * prepared to break up compounds into smaller pieces than that.
7917 * So, no point even trying to continue if the server won't
7918 * cooperate:
7919 */
7920 if (rcvd->max_ops < sent->max_ops)
7921 return -EINVAL;
7922 if (rcvd->max_reqs == 0)
7923 return -EINVAL;
b4b9a0c1
VG		 7924 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7925 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7926 return 0;
8d35301d
AA		 7927}
7928
79969dd1
TM		 7929static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7930 struct nfs41_create_session_res *res)
43c2e885
BF		 7931{
7932 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7933 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7934
b1c0df5f
TM		 7935 if (!(res->flags & SESSION4_BACK_CHAN))
7936 goto out;
43c2e885
BF		 7937 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7938 return -EINVAL;
7939 if (rcvd->max_resp_sz < sent->max_resp_sz)
7940 return -EINVAL;
7941 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7942 return -EINVAL;
5405fc44 7943 if (rcvd->max_ops > sent->max_ops)
43c2e885 7944 return -EINVAL;
5405fc44 7945 if (rcvd->max_reqs > sent->max_reqs)
43c2e885 7946 return -EINVAL;
b1c0df5f 7947out:
43c2e885
BF		 7948 return 0;
7949}
8d35301d 7950
8d35301d 7951static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7952 struct nfs41_create_session_res *res)
8d35301d 7953{
43c2e885 7954 int ret;
8d35301d 7955
79969dd1 7956 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7957 if (ret)
7958 return ret;
79969dd1
TM		 7959 return nfs4_verify_back_channel_attrs(args, res);
7960}
7961
7962static void nfs4_update_session(struct nfs4_session *session,
7963 struct nfs41_create_session_res *res)
7964{
7965 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7966 /* Mark client id and session as being confirmed */
7967 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7968 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7969 session->flags = res->flags;
7970 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7971 if (res->flags & SESSION4_BACK_CHAN)
7972 memcpy(&session->bc_attrs, &res->bc_attrs,
7973 sizeof(session->bc_attrs));
8d35301d
AA		 7974}
7975
848f5bda
TM		 7976static int _nfs4_proc_create_session(struct nfs_client *clp,
7977 struct rpc_cred *cred)
fc931582
AA		 7978{
7979 struct nfs4_session *session = clp->cl_session;
7980 struct nfs41_create_session_args args = {
7981 .client = clp,
79969dd1
TM		 7982 .clientid = clp->cl_clientid,
7983 .seqid = clp->cl_seqid,
fc931582
AA		 7984 .cb_program = NFS4_CALLBACK,
7985 };
79969dd1
TM		 7986 struct nfs41_create_session_res res;
7987
fc931582
AA		 7988 struct rpc_message msg = {
7989 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7990 .rpc_argp = &args,
7991 .rpc_resp = &res,
848f5bda 7992 .rpc_cred = cred,
fc931582
AA		 7993 };
7994 int status;
7995
6b26cc8c 7996 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
0f91421e 7997 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7998
1bd714f2 7999 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 8000 trace_nfs4_create_session(clp, status);
fc931582 8001
b519d408
TM		 8002 switch (status) {
8003 case -NFS4ERR_STALE_CLIENTID:
8004 case -NFS4ERR_DELAY:
8005 case -ETIMEDOUT:
8006 case -EACCES:
8007 case -EAGAIN:
8008 goto out;
8009 };
8010
8011 clp->cl_seqid++;
43095d39 8012 if (!status) {
8d35301d 8013 /* Verify the session's negotiated channel_attrs values */
79969dd1 8014 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 8015 /* Increment the clientid slot sequence id */
79969dd1
TM		 8016 if (status)
8017 goto out;
8018 nfs4_update_session(session, &res);
fc931582 8019 }
79969dd1 8020out:
fc931582
AA		 8021 return status;
8022}
8023
8024/*
8025 * Issues a CREATE_SESSION operation to the server.
8026 * It is the responsibility of the caller to verify the session is
8027 * expired before calling this routine.
8028 */
848f5bda 8029int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 8030{
8031 int status;
8032 unsigned *ptr;
fc931582
AA		 8033 struct nfs4_session *session = clp->cl_session;
8034
8035 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
8036
848f5bda 8037 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 8038 if (status)
8039 goto out;
8040
aacd5537
AA		 8041 /* Init or reset the session slot tables */
8042 status = nfs4_setup_session_slot_tables(session);
8043 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 8044 if (status)
8045 goto out;
8046
8047 ptr = (unsigned *)&session->sess_id.data[0];
8048 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
8049 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 8050out:
8051 dprintk("<-- %s\n", __func__);
8052 return status;
8053}
8054
0f3e66c6
AA		 8055/*
8056 * Issue the over-the-wire RPC DESTROY_SESSION.
8057 * The caller must serialize access to this routine.
8058 */
848f5bda
TM		 8059int nfs4_proc_destroy_session(struct nfs4_session *session,
8060 struct rpc_cred *cred)
0f3e66c6 8061{
848f5bda
TM		 8062 struct rpc_message msg = {
8063 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
8064 .rpc_argp = session,
8065 .rpc_cred = cred,
8066 };
0f3e66c6 8067 int status = 0;
0f3e66c6
AA		 8068
8069 dprintk("--> nfs4_proc_destroy_session\n");
8070
8071 /* session is still being setup */
e11259f9
TM		 8072 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
8073 return 0;
0f3e66c6 8074
1bd714f2 8075 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 8076 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 8077
8078 if (status)
08106ac7 8079 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 8080 "Session has been destroyed regardless...\n", status);
8081
8082 dprintk("<-- nfs4_proc_destroy_session\n");
8083 return status;
8084}
8085
fc01cea9
AA		 8086/*
8087 * Renew the cl_session lease.
8088 */
d5f8d3fe
TM		 8089struct nfs4_sequence_data {
8090 struct nfs_client *clp;
8091 struct nfs4_sequence_args args;
8092 struct nfs4_sequence_res res;
8093};
8094
dc96aef9
AB		 8095static void nfs41_sequence_release(void *data)
8096{
d5f8d3fe
TM		 8097 struct nfs4_sequence_data *calldata = data;
8098 struct nfs_client *clp = calldata->clp;
dc96aef9 8099
7135840f
AB		 8100 if (atomic_read(&clp->cl_count) > 1)
8101 nfs4_schedule_state_renewal(clp);
8102 nfs_put_client(clp);
d5f8d3fe 8103 kfree(calldata);
dc96aef9
AB		 8104}
8105
aa5190d0
TM		 8106static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8107{
8108 switch(task->tk_status) {
8109 case -NFS4ERR_DELAY:
aa5190d0
TM		 8110 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8111 return -EAGAIN;
8112 default:
0400a6b0 8113 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 8114 }
8115 return 0;
8116}
8117
dc96aef9 8118static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 8119{
d5f8d3fe
TM		 8120 struct nfs4_sequence_data *calldata = data;
8121 struct nfs_client *clp = calldata->clp;
fc01cea9 8122
14516c3a
TM		 8123 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
8124 return;
fc01cea9 8125
c6d01c6f 8126 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 8127 if (task->tk_status < 0) {
8128 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 8129 if (atomic_read(&clp->cl_count) == 1)
8130 goto out;
fc01cea9 8131
aa5190d0
TM		 8132 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
8133 rpc_restart_call_prepare(task);
fc01cea9
AA		 8134 return;
8135 }
8136 }
fc01cea9 8137 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 8138out:
fc01cea9
AA		 8139 dprintk("<-- %s\n", __func__);
8140}
8141
8142static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
8143{
d5f8d3fe
TM		 8144 struct nfs4_sequence_data *calldata = data;
8145 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 8146 struct nfs4_sequence_args *args;
8147 struct nfs4_sequence_res *res;
8148
fc01cea9
AA		 8149 args = task->tk_msg.rpc_argp;
8150 res = task->tk_msg.rpc_resp;
8151
d9afbd1b 8152 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 8153}
8154
8155static const struct rpc_call_ops nfs41_sequence_ops = {
8156 .rpc_call_done = nfs41_sequence_call_done,
8157 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 8158 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 8159};
8160
8fe72bac
TM		 8161static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
8162 struct rpc_cred *cred,
8163 bool is_privileged)
fc01cea9 8164{
d5f8d3fe 8165 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 8166 struct rpc_message msg = {
8167 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
8168 .rpc_cred = cred,
8169 };
71ac6da9
TM		 8170 struct rpc_task_setup task_setup_data = {
8171 .rpc_client = clp->cl_rpcclient,
8172 .rpc_message = &msg,
8fe72bac 8173 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 8174 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 8175 };
fc01cea9 8176
7135840f 8177 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 8178 return ERR_PTR(-EIO);
dfb4f309 8179 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 8180 if (calldata == NULL) {
7135840f 8181 nfs_put_client(clp);
71ac6da9 8182 return ERR_PTR(-ENOMEM);
fc01cea9 8183 }
a9c92d6b 8184 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 8185 if (is_privileged)
8186 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 8187 msg.rpc_argp = &calldata->args;
8188 msg.rpc_resp = &calldata->res;
8189 calldata->clp = clp;
71ac6da9 8190 task_setup_data.callback_data = calldata;
fc01cea9 8191
71ac6da9
TM		 8192 return rpc_run_task(&task_setup_data);
8193}
8194
2f60ea6b 8195static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 8196{
8197 struct rpc_task *task;
8198 int ret = 0;
8199
2f60ea6b 8200 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 8201 return -EAGAIN;
8fe72bac 8202 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 8203 if (IS_ERR(task))
8204 ret = PTR_ERR(task);
8205 else
bf294b41 8206 rpc_put_task_async(task);
71ac6da9
TM		 8207 dprintk("<-- %s status=%d\n", __func__, ret);
8208 return ret;
8209}
8210
8211static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
8212{
8213 struct rpc_task *task;
8214 int ret;
8215
8fe72bac 8216 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 8217 if (IS_ERR(task)) {
8218 ret = PTR_ERR(task);
8219 goto out;
8220 }
8221 ret = rpc_wait_for_completion_task(task);
be824167 8222 if (!ret)
71ac6da9
TM		 8223 ret = task->tk_status;
8224 rpc_put_task(task);
8225out:
8226 dprintk("<-- %s status=%d\n", __func__, ret);
8227 return ret;
fc01cea9
AA		 8228}
8229
fce5c838
RL		 8230struct nfs4_reclaim_complete_data {
8231 struct nfs_client *clp;
8232 struct nfs41_reclaim_complete_args arg;
8233 struct nfs41_reclaim_complete_res res;
8234};
8235
8236static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
8237{
8238 struct nfs4_reclaim_complete_data *calldata = data;
8239
d9afbd1b
TM		 8240 nfs41_setup_sequence(calldata->clp->cl_session,
8241 &calldata->arg.seq_args,
8242 &calldata->res.seq_res,
8243 task);
fce5c838
RL		 8244}
8245
aa5190d0
TM		 8246static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8247{
8248 switch(task->tk_status) {
8249 case 0:
8250 case -NFS4ERR_COMPLETE_ALREADY:
8251 case -NFS4ERR_WRONG_CRED: /* What to do here? */
8252 break;
8253 case -NFS4ERR_DELAY:
aa5190d0 8254 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 8255 /* fall through */
8256 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 8257 return -EAGAIN;
8258 default:
0400a6b0 8259 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 8260 }
8261 return 0;
8262}
8263
fce5c838
RL		 8264static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
8265{
8266 struct nfs4_reclaim_complete_data *calldata = data;
8267 struct nfs_client *clp = calldata->clp;
8268 struct nfs4_sequence_res *res = &calldata->res.seq_res;
8269
8270 dprintk("--> %s\n", __func__);
14516c3a
TM		 8271 if (!nfs41_sequence_done(task, res))
8272 return;
fce5c838 8273
c6d01c6f 8274 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 8275 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
8276 rpc_restart_call_prepare(task);
8277 return;
8278 }
fce5c838
RL		 8279 dprintk("<-- %s\n", __func__);
8280}
8281
8282static void nfs4_free_reclaim_complete_data(void *data)
8283{
8284 struct nfs4_reclaim_complete_data *calldata = data;
8285
8286 kfree(calldata);
8287}
8288
8289static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
8290 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
8291 .rpc_call_done = nfs4_reclaim_complete_done,
8292 .rpc_release = nfs4_free_reclaim_complete_data,
8293};
8294
8295/*
8296 * Issue a global reclaim complete.
8297 */
965e9c23
TM		 8298static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
8299 struct rpc_cred *cred)
fce5c838
RL		 8300{
8301 struct nfs4_reclaim_complete_data *calldata;
8302 struct rpc_task *task;
8303 struct rpc_message msg = {
8304 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 8305 .rpc_cred = cred,
fce5c838
RL		 8306 };
8307 struct rpc_task_setup task_setup_data = {
8308 .rpc_client = clp->cl_rpcclient,
8309 .rpc_message = &msg,
8310 .callback_ops = &nfs4_reclaim_complete_call_ops,
8311 .flags = RPC_TASK_ASYNC,
8312 };
8313 int status = -ENOMEM;
8314
8315 dprintk("--> %s\n", __func__);
8535b2be 8316 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 8317 if (calldata == NULL)
8318 goto out;
8319 calldata->clp = clp;
8320 calldata->arg.one_fs = 0;
fce5c838 8321
a9c92d6b 8322 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 8323 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 8324 msg.rpc_argp = &calldata->arg;
8325 msg.rpc_resp = &calldata->res;
8326 task_setup_data.callback_data = calldata;
8327 task = rpc_run_task(&task_setup_data);
acf82b85 8328 if (IS_ERR(task)) {
fce5c838 8329 status = PTR_ERR(task);
acf82b85
DC		 8330 goto out;
8331 }
c34c32ea
AA		 8332 status = nfs4_wait_for_completion_rpc_task(task);
8333 if (status == 0)
8334 status = task->tk_status;
fce5c838 8335 rpc_put_task(task);
acf82b85 8336 return 0;
fce5c838
RL		 8337out:
8338 dprintk("<-- %s status=%d\n", __func__, status);
8339 return status;
8340}
b1f69b75
AA		 8341
8342static void
8343nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
8344{
8345 struct nfs4_layoutget *lgp = calldata;
c31663d4 8346 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 8347 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 8348
8349 dprintk("--> %s\n", __func__);
183d9e7b
JL		 8350 nfs41_setup_sequence(session, &lgp->args.seq_args,
8351 &lgp->res.seq_res, task);
8352 dprintk("<-- %s\n", __func__);
b1f69b75
AA		 8353}
8354
8355static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
8356{
8357 struct nfs4_layoutget *lgp = calldata;
183d9e7b
JL		 8358
8359 dprintk("--> %s\n", __func__);
2e80dbe7 8360 nfs41_sequence_process(task, &lgp->res.seq_res);
183d9e7b
JL		 8361 dprintk("<-- %s\n", __func__);
8362}
8363
8364static int
8365nfs4_layoutget_handle_exception(struct rpc_task *task,
8366 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
8367{
ee314c2a
TM		 8368 struct inode *inode = lgp->args.inode;
8369 struct nfs_server *server = NFS_SERVER(inode);
8370 struct pnfs_layout_hdr *lo;
e85d7ee4
TM		 8371 int nfs4err = task->tk_status;
8372 int err, status = 0;
f7db0b28 8373 LIST_HEAD(head);
b1f69b75 8374
ed7e5423 8375 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 8376
e85d7ee4 8377 switch (nfs4err) {
b1f69b75 8378 case 0:
ee314c2a 8379 goto out;
7c1e6e58
PT		 8380
8381 /*
8382 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
8383 * on the file. set tk_status to -ENODATA to tell upper layer to
8384 * retry go inband.
8385 */
8386 case -NFS4ERR_LAYOUTUNAVAILABLE:
183d9e7b 8387 status = -ENODATA;
7c1e6e58 8388 goto out;
21b874c8
TM		 8389 /*
8390 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
8391 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
8392 */
8393 case -NFS4ERR_BADLAYOUT:
183d9e7b
JL		 8394 status = -EOVERFLOW;
8395 goto out;
ed7e5423
BH		 8396 /*
8397 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
21b874c8
TM		 8398 * (or clients) writing to the same RAID stripe except when
8399 * the minlength argument is 0 (see RFC5661 section 18.43.3).
183d9e7b
JL		 8400 *
8401 * Treat it like we would RECALLCONFLICT -- we retry for a little
8402 * while, and then eventually give up.
ed7e5423 8403 */
b1f69b75 8404 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b
JL		 8405 if (lgp->args.minlength == 0) {
8406 status = -EOVERFLOW;
8407 goto out;
ed7e5423 8408 }
e85d7ee4
TM		 8409 status = -EBUSY;
8410 break;
183d9e7b 8411 case -NFS4ERR_RECALLCONFLICT:
183d9e7b 8412 status = -ERECALLCONFLICT;
e85d7ee4 8413 break;
26f47443
TM		 8414 case -NFS4ERR_DELEG_REVOKED:
8415 case -NFS4ERR_ADMIN_REVOKED:
ee314c2a
TM		 8416 case -NFS4ERR_EXPIRED:
8417 case -NFS4ERR_BAD_STATEID:
183d9e7b 8418 exception->timeout = 0;
ee314c2a 8419 spin_lock(&inode->i_lock);
f7db0b28
TM		 8420 lo = NFS_I(inode)->layout;
8421 /* If the open stateid was bad, then recover it. */
8422 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
8423 nfs4_stateid_match_other(&lgp->args.stateid,
2259f960 8424 &lgp->args.ctx->state->stateid)) {
ee314c2a 8425 spin_unlock(&inode->i_lock);
183d9e7b 8426 exception->state = lgp->args.ctx->state;
26f47443 8427 exception->stateid = &lgp->args.stateid;
2259f960
TM		 8428 break;
8429 }
f7db0b28
TM		 8430
8431 /*
8432 * Mark the bad layout state as invalid, then retry
8433 */
668f455d 8434 pnfs_mark_layout_stateid_invalid(lo, &head);
f7db0b28
TM		 8435 spin_unlock(&inode->i_lock);
8436 pnfs_free_lseg_list(&head);
8437 status = -EAGAIN;
8438 goto out;
b1f69b75 8439 }
183d9e7b 8440
e85d7ee4
TM		 8441 err = nfs4_handle_exception(server, nfs4err, exception);
8442 if (!status) {
8443 if (exception->retry)
8444 status = -EAGAIN;
8445 else
8446 status = err;
8447 }
ee314c2a 8448out:
b1f69b75 8449 dprintk("<-- %s\n", __func__);
183d9e7b 8450 return status;
b1f69b75
AA		 8451}
8452
8554116e
IK		 8453static size_t max_response_pages(struct nfs_server *server)
8454{
8455 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
8456 return nfs_page_array_len(0, max_resp_sz);
8457}
8458
8459static void nfs4_free_pages(struct page **pages, size_t size)
8460{
8461 int i;
8462
8463 if (!pages)
8464 return;
8465
8466 for (i = 0; i < size; i++) {
8467 if (!pages[i])
8468 break;
8469 __free_page(pages[i]);
8470 }
8471 kfree(pages);
8472}
8473
8474static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
8475{
8476 struct page **pages;
8477 int i;
8478
8479 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
8480 if (!pages) {
8481 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
8482 return NULL;
8483 }
8484
8485 for (i = 0; i < size; i++) {
8486 pages[i] = alloc_page(gfp_flags);
8487 if (!pages[i]) {
8488 dprintk("%s: failed to allocate page\n", __func__);
8489 nfs4_free_pages(pages, size);
8490 return NULL;
8491 }
8492 }
8493
8494 return pages;
8495}
8496
b1f69b75
AA		 8497static void nfs4_layoutget_release(void *calldata)
8498{
8499 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 8500 struct inode *inode = lgp->args.inode;
8501 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8502 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8503
8504 dprintk("--> %s\n", __func__);
8554116e 8505 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 8506 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 8507 put_nfs_open_context(lgp->args.ctx);
8508 kfree(calldata);
8509 dprintk("<-- %s\n", __func__);
8510}
8511
8512static const struct rpc_call_ops nfs4_layoutget_call_ops = {
8513 .rpc_call_prepare = nfs4_layoutget_prepare,
8514 .rpc_call_done = nfs4_layoutget_done,
8515 .rpc_release = nfs4_layoutget_release,
8516};
8517
a0b0a6e3 8518struct pnfs_layout_segment *
183d9e7b 8519nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags)
b1f69b75 8520{
a47970ff
WAA		 8521 struct inode *inode = lgp->args.inode;
8522 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8523 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8524 struct rpc_task *task;
8525 struct rpc_message msg = {
8526 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
8527 .rpc_argp = &lgp->args,
8528 .rpc_resp = &lgp->res,
6ab59344 8529 .rpc_cred = lgp->cred,
b1f69b75
AA		 8530 };
8531 struct rpc_task_setup task_setup_data = {
8532 .rpc_client = server->client,
8533 .rpc_message = &msg,
8534 .callback_ops = &nfs4_layoutget_call_ops,
8535 .callback_data = lgp,
8536 .flags = RPC_TASK_ASYNC,
8537 };
a0b0a6e3 8538 struct pnfs_layout_segment *lseg = NULL;
bc23676c
TM		 8539 struct nfs4_exception exception = {
8540 .inode = inode,
8541 .timeout = *timeout,
8542 };
b1f69b75
AA		 8543 int status = 0;
8544
8545 dprintk("--> %s\n", __func__);
8546
4bd5a980
PT		 8547 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
8548 pnfs_get_layout_hdr(NFS_I(inode)->layout);
8549
8554116e
IK		 8550 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
8551 if (!lgp->args.layout.pages) {
8552 nfs4_layoutget_release(lgp);
a0b0a6e3 8553 return ERR_PTR(-ENOMEM);
8554116e
IK		 8554 }
8555 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
8556
35124a09 8557 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 8558 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 8559 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 8560
b1f69b75
AA		 8561 task = rpc_run_task(&task_setup_data);
8562 if (IS_ERR(task))
a0b0a6e3 8563 return ERR_CAST(task);
b1f69b75 8564 status = nfs4_wait_for_completion_rpc_task(task);
183d9e7b
JL		 8565 if (status == 0) {
8566 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
8567 *timeout = exception.timeout;
8568 }
8569
1037e6ea
TM		 8570 trace_nfs4_layoutget(lgp->args.ctx,
8571 &lgp->args.range,
8572 &lgp->res.range,
48c9579a 8573 &lgp->res.stateid,
1037e6ea 8574 status);
183d9e7b 8575
085b7a45
WAA		 8576 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8577 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 8578 lseg = pnfs_layout_process(lgp);
2e80dbe7 8579 nfs4_sequence_free_slot(&lgp->res.seq_res);
b1f69b75
AA		 8580 rpc_put_task(task);
8581 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 8582 if (status)
8583 return ERR_PTR(status);
8584 return lseg;
b1f69b75
AA		 8585}
8586
cbe82603
BH		 8587static void
8588nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8589{
8590 struct nfs4_layoutreturn *lrp = calldata;
8591
8592 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 8593 nfs41_setup_sequence(lrp->clp->cl_session,
8594 &lrp->args.seq_args,
8595 &lrp->res.seq_res,
8596 task);
cbe82603
BH		 8597}
8598
8599static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8600{
8601 struct nfs4_layoutreturn *lrp = calldata;
8602 struct nfs_server *server;
8603
8604 dprintk("--> %s\n", __func__);
8605
2e80dbe7 8606 if (!nfs41_sequence_process(task, &lrp->res.seq_res))
cbe82603
BH		 8607 return;
8608
8609 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 8610 switch (task->tk_status) {
8611 default:
8612 task->tk_status = 0;
8613 case 0:
8614 break;
8615 case -NFS4ERR_DELAY:
8478eaa1 8616 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 8617 break;
2e80dbe7 8618 nfs4_sequence_free_slot(&lrp->res.seq_res);
d00c5d43 8619 rpc_restart_call_prepare(task);
cbe82603
BH		 8620 return;
8621 }
cbe82603
BH		 8622 dprintk("<-- %s\n", __func__);
8623}
8624
8625static void nfs4_layoutreturn_release(void *calldata)
8626{
8627 struct nfs4_layoutreturn *lrp = calldata;
849b286f 8628 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 8629
8630 dprintk("--> %s\n", __func__);
2a974425 8631 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range,
68f74479 8632 lrp->res.lrs_present ? &lrp->res.stateid : NULL);
2e80dbe7 8633 nfs4_sequence_free_slot(&lrp->res.seq_res);
70c3bd2b 8634 pnfs_put_layout_hdr(lrp->args.layout);
5a0ec8ac 8635 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 8636 kfree(calldata);
8637 dprintk("<-- %s\n", __func__);
8638}
8639
8640static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8641 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8642 .rpc_call_done = nfs4_layoutreturn_done,
8643 .rpc_release = nfs4_layoutreturn_release,
8644};
8645
6c16605d 8646int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 8647{
8648 struct rpc_task *task;
8649 struct rpc_message msg = {
8650 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8651 .rpc_argp = &lrp->args,
8652 .rpc_resp = &lrp->res,
9556000d 8653 .rpc_cred = lrp->cred,
cbe82603
BH		 8654 };
8655 struct rpc_task_setup task_setup_data = {
1771c577 8656 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8657 .rpc_message = &msg,
8658 .callback_ops = &nfs4_layoutreturn_call_ops,
8659 .callback_data = lrp,
8660 };
6c16605d 8661 int status = 0;
cbe82603 8662
99ade3c7
AE		 8663 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
8664 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
8665 &task_setup_data.rpc_client, &msg);
8666
cbe82603 8667 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8668 if (!sync) {
8669 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8670 if (!lrp->inode) {
8671 nfs4_layoutreturn_release(lrp);
8672 return -EAGAIN;
8673 }
8674 task_setup_data.flags |= RPC_TASK_ASYNC;
8675 }
a9c92d6b 8676 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8677 task = rpc_run_task(&task_setup_data);
8678 if (IS_ERR(task))
8679 return PTR_ERR(task);
5a0ec8ac
TM		 8680 if (sync)
8681 status = task->tk_status;
48c9579a 8682 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
cbe82603
BH		 8683 dprintk("<-- %s status=%d\n", __func__, status);
8684 rpc_put_task(task);
8685 return status;
8686}
8687
b1f69b75 8688static int
cd5875fe
TM		 8689_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8690 struct pnfs_device *pdev,
8691 struct rpc_cred *cred)
b1f69b75
AA		 8692{
8693 struct nfs4_getdeviceinfo_args args = {
8694 .pdev = pdev,
4e590803
TM		 8695 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8696 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8697 };
8698 struct nfs4_getdeviceinfo_res res = {
8699 .pdev = pdev,
8700 };
8701 struct rpc_message msg = {
8702 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8703 .rpc_argp = &args,
8704 .rpc_resp = &res,
cd5875fe 8705 .rpc_cred = cred,
b1f69b75
AA		 8706 };
8707 int status;
8708
8709 dprintk("--> %s\n", __func__);
7c513058 8710 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8711 if (res.notification & ~args.notify_types)
8712 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8713 if (res.notification != args.notify_types)
8714 pdev->nocache = 1;
4e590803 8715
b1f69b75
AA		 8716 dprintk("<-- %s status=%d\n", __func__, status);
8717
8718 return status;
8719}
8720
cd5875fe
TM		 8721int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8722 struct pnfs_device *pdev,
8723 struct rpc_cred *cred)
b1f69b75
AA		 8724{
8725 struct nfs4_exception exception = { };
8726 int err;
8727
8728 do {
8729 err = nfs4_handle_exception(server,
cd5875fe 8730 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8731 &exception);
8732 } while (exception.retry);
8733 return err;
8734}
8735EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8736
863a3c6c
AA		 8737static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8738{
8739 struct nfs4_layoutcommit_data *data = calldata;
8740 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 8741 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 8742
d9afbd1b
TM		 8743 nfs41_setup_sequence(session,
8744 &data->args.seq_args,
8745 &data->res.seq_res,
8746 task);
863a3c6c
AA		 8747}
8748
8749static void
8750nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8751{
8752 struct nfs4_layoutcommit_data *data = calldata;
8753 struct nfs_server *server = NFS_SERVER(data->args.inode);
8754
6ba7db34 8755 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8756 return;
8757
8758 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8759 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8760 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8761 case -NFS4ERR_BADLAYOUT: /* no layout */
8762 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8763 task->tk_status = 0;
e59d27e0 8764 case 0:
e59d27e0
TM		 8765 break;
8766 default:
8478eaa1 8767 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8768 rpc_restart_call_prepare(task);
8769 return;
8770 }
8771 }
863a3c6c
AA		 8772}
8773
8774static void nfs4_layoutcommit_release(void *calldata)
8775{
8776 struct nfs4_layoutcommit_data *data = calldata;
8777
db29c089 8778 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8779 nfs_post_op_update_inode_force_wcc(data->args.inode,
8780 data->res.fattr);
863a3c6c 8781 put_rpccred(data->cred);
472e2594 8782 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8783 kfree(data);
8784}
8785
8786static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8787 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8788 .rpc_call_done = nfs4_layoutcommit_done,
8789 .rpc_release = nfs4_layoutcommit_release,
8790};
8791
8792int
ef311537 8793nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8794{
8795 struct rpc_message msg = {
8796 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8797 .rpc_argp = &data->args,
8798 .rpc_resp = &data->res,
8799 .rpc_cred = data->cred,
8800 };
8801 struct rpc_task_setup task_setup_data = {
8802 .task = &data->task,
8803 .rpc_client = NFS_CLIENT(data->args.inode),
8804 .rpc_message = &msg,
8805 .callback_ops = &nfs4_layoutcommit_ops,
8806 .callback_data = data,
863a3c6c
AA		 8807 };
8808 struct rpc_task *task;
8809 int status = 0;
8810
b4839ebe
KM		 8811 dprintk("NFS: initiating layoutcommit call. sync %d "
8812 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8813 data->args.lastbytewritten,
8814 data->args.inode->i_ino);
8815
472e2594
TM		 8816 if (!sync) {
8817 data->inode = nfs_igrab_and_active(data->args.inode);
8818 if (data->inode == NULL) {
8819 nfs4_layoutcommit_release(data);
8820 return -EAGAIN;
8821 }
8822 task_setup_data.flags = RPC_TASK_ASYNC;
8823 }
a9c92d6b 8824 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8825 task = rpc_run_task(&task_setup_data);
8826 if (IS_ERR(task))
8827 return PTR_ERR(task);
472e2594
TM		 8828 if (sync)
8829 status = task->tk_status;
48c9579a 8830 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
863a3c6c
AA		 8831 dprintk("%s: status %d\n", __func__, status);
8832 rpc_put_task(task);
8833 return status;
8834}
fca78d6d 8835
97431204
AA		 8836/**
8837 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8838 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8839 */
fca78d6d
BS		 8840static int
8841_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8842 struct nfs_fsinfo *info,
8843 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8844{
8845 struct nfs41_secinfo_no_name_args args = {
8846 .style = SECINFO_STYLE_CURRENT_FH,
8847 };
8848 struct nfs4_secinfo_res res = {
8849 .flavors = flavors,
8850 };
8851 struct rpc_message msg = {
8852 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8853 .rpc_argp = &args,
8854 .rpc_resp = &res,
8855 };
b1b3e136 8856 struct rpc_clnt *clnt = server->client;
7cb852df 8857 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8858 int status;
8859
8860 if (use_integrity) {
8861 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8862 cred = nfs4_get_clid_cred(server->nfs_client);
8863 msg.rpc_cred = cred;
b1b3e136
WAA		 8864 }
8865
8866 dprintk("--> %s\n", __func__);
8867 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8868 &res.seq_res, 0);
8869 dprintk("<-- %s status=%d\n", __func__, status);
8870
7cb852df
WAA		 8871 if (cred)
8872 put_rpccred(cred);
b1b3e136
WAA		 8873
8874 return status;
fca78d6d
BS		 8875}
8876
8877static int
8878nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8879 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8880{
8881 struct nfs4_exception exception = { };
8882 int err;
8883 do {
b1b3e136
WAA		 8884 /* first try using integrity protection */
8885 err = -NFS4ERR_WRONGSEC;
8886
8887 /* try to use integrity protection with machine cred */
8888 if (_nfs4_is_integrity_protected(server->nfs_client))
8889 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8890 flavors, true);
8891
8892 /*
8893 * if unable to use integrity protection, or SECINFO with
8894 * integrity protection returns NFS4ERR_WRONGSEC (which is
8895 * disallowed by spec, but exists in deployed servers) use
8896 * the current filesystem's rpc_client and the user cred.
8897 */
8898 if (err == -NFS4ERR_WRONGSEC)
8899 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8900 flavors, false);
8901
fca78d6d
BS		 8902 switch (err) {
8903 case 0:
8904 case -NFS4ERR_WRONGSEC:
78b19bae 8905 case -ENOTSUPP:
05e9cfb4 8906 goto out;
fca78d6d
BS		 8907 default:
8908 err = nfs4_handle_exception(server, err, &exception);
8909 }
8910 } while (exception.retry);
05e9cfb4 8911out:
fca78d6d
BS		 8912 return err;
8913}
8914
8915static int
8916nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8917 struct nfs_fsinfo *info)
8918{
8919 int err;
8920 struct page *page;
367156d9 8921 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8922 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8923 struct nfs4_secinfo4 *secinfo;
8924 int i;
fca78d6d
BS		 8925
8926 page = alloc_page(GFP_KERNEL);
8927 if (!page) {
8928 err = -ENOMEM;
8929 goto out;
8930 }
8931
8932 flavors = page_address(page);
8933 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8934
8935 /*
8936 * Fall back on "guess and check" method if
8937 * the server doesn't support SECINFO_NO_NAME
8938 */
78b19bae 8939 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8940 err = nfs4_find_root_sec(server, fhandle, info);
8941 goto out_freepage;
8942 }
8943 if (err)
8944 goto out_freepage;
8945
58a8cf12
WAA		 8946 for (i = 0; i < flavors->num_flavors; i++) {
8947 secinfo = &flavors->flavors[i];
8948
8949 switch (secinfo->flavor) {
8950 case RPC_AUTH_NULL:
8951 case RPC_AUTH_UNIX:
8952 case RPC_AUTH_GSS:
8953 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8954 &secinfo->flavor_info);
8955 break;
8956 default:
8957 flavor = RPC_AUTH_MAXFLAVOR;
8958 break;
8959 }
8960
4d4b69dd
WAA		 8961 if (!nfs_auth_info_match(&server->auth_info, flavor))
8962 flavor = RPC_AUTH_MAXFLAVOR;
8963
58a8cf12
WAA		 8964 if (flavor != RPC_AUTH_MAXFLAVOR) {
8965 err = nfs4_lookup_root_sec(server, fhandle,
8966 info, flavor);
8967 if (!err)
8968 break;
8969 }
8970 }
8971
8972 if (flavor == RPC_AUTH_MAXFLAVOR)
8973 err = -EPERM;
fca78d6d
BS		 8974
8975out_freepage:
8976 put_page(page);
8977 if (err == -EACCES)
8978 return -EPERM;
8979out:
8980 return err;
8981}
1cab0652 8982
ab7cb0df
TM		 8983static int _nfs41_test_stateid(struct nfs_server *server,
8984 nfs4_stateid *stateid,
8985 struct rpc_cred *cred)
7d974794
BS		 8986{
8987 int status;
8988 struct nfs41_test_stateid_args args = {
1cab0652 8989 .stateid = stateid,
7d974794
BS		 8990 };
8991 struct nfs41_test_stateid_res res;
8992 struct rpc_message msg = {
8993 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8994 .rpc_argp = &args,
8995 .rpc_resp = &res,
ab7cb0df 8996 .rpc_cred = cred,
7d974794 8997 };
3787d506
WAA		 8998 struct rpc_clnt *rpc_client = server->client;
8999
9000 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9001 &rpc_client, &msg);
1cab0652 9002
38527b15 9003 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 9004 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 9005 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 9006 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 9007 &args.seq_args, &res.seq_res);
38527b15
CL		 9008 if (status != NFS_OK) {
9009 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 9010 return status;
38527b15
CL		 9011 }
9012 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 9013 return -res.status;
7d974794
BS		 9014}
9015
43912bbb
TM		 9016static void nfs4_handle_delay_or_session_error(struct nfs_server *server,
9017 int err, struct nfs4_exception *exception)
9018{
9019 exception->retry = 0;
9020 switch(err) {
9021 case -NFS4ERR_DELAY:
76e8a1bd 9022 case -NFS4ERR_RETRY_UNCACHED_REP:
43912bbb
TM		 9023 nfs4_handle_exception(server, err, exception);
9024 break;
9025 case -NFS4ERR_BADSESSION:
9026 case -NFS4ERR_BADSLOT:
9027 case -NFS4ERR_BAD_HIGH_SLOT:
9028 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
9029 case -NFS4ERR_DEADSESSION:
9030 nfs4_do_handle_exception(server, err, exception);
9031 }
9032}
9033
38527b15
CL		 9034/**
9035 * nfs41_test_stateid - perform a TEST_STATEID operation
9036 *
9037 * @server: server / transport on which to perform the operation
9038 * @stateid: state ID to test
ab7cb0df 9039 * @cred: credential
38527b15
CL		 9040 *
9041 * Returns NFS_OK if the server recognizes that "stateid" is valid.
9042 * Otherwise a negative NFS4ERR value is returned if the operation
9043 * failed or the state ID is not currently valid.
9044 */
ab7cb0df
TM		 9045static int nfs41_test_stateid(struct nfs_server *server,
9046 nfs4_stateid *stateid,
9047 struct rpc_cred *cred)
7d974794
BS		 9048{
9049 struct nfs4_exception exception = { };
9050 int err;
9051 do {
ab7cb0df 9052 err = _nfs41_test_stateid(server, stateid, cred);
43912bbb 9053 nfs4_handle_delay_or_session_error(server, err, &exception);
7d974794
BS		 9054 } while (exception.retry);
9055 return err;
9056}
9aeda35f 9057
7c1d5fae
TM		 9058struct nfs_free_stateid_data {
9059 struct nfs_server *server;
9060 struct nfs41_free_stateid_args args;
9aeda35f 9061 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 9062};
9063
9064static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
9065{
9066 struct nfs_free_stateid_data *data = calldata;
9067 nfs41_setup_sequence(nfs4_get_session(data->server),
9068 &data->args.seq_args,
9069 &data->res.seq_res,
9070 task);
9071}
9072
9073static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
9074{
9075 struct nfs_free_stateid_data *data = calldata;
9076
9077 nfs41_sequence_done(task, &data->res.seq_res);
9078
9079 switch (task->tk_status) {
9080 case -NFS4ERR_DELAY:
8478eaa1 9081 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 9082 rpc_restart_call_prepare(task);
9083 }
9084}
9085
9086static void nfs41_free_stateid_release(void *calldata)
9087{
9088 kfree(calldata);
9089}
9090
17f26b12 9091static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 9092 .rpc_call_prepare = nfs41_free_stateid_prepare,
9093 .rpc_call_done = nfs41_free_stateid_done,
9094 .rpc_release = nfs41_free_stateid_release,
9095};
9096
9097static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
f0b0bf88 9098 const nfs4_stateid *stateid,
ab7cb0df 9099 struct rpc_cred *cred,
7c1d5fae
TM		 9100 bool privileged)
9101{
9aeda35f
BS		 9102 struct rpc_message msg = {
9103 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 9104 .rpc_cred = cred,
9aeda35f 9105 };
7c1d5fae
TM		 9106 struct rpc_task_setup task_setup = {
9107 .rpc_client = server->client,
9108 .rpc_message = &msg,
9109 .callback_ops = &nfs41_free_stateid_ops,
9110 .flags = RPC_TASK_ASYNC,
9111 };
9112 struct nfs_free_stateid_data *data;
9aeda35f 9113
3787d506
WAA		 9114 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9115 &task_setup.rpc_client, &msg);
9116
38527b15 9117 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 9118 data = kmalloc(sizeof(*data), GFP_NOFS);
9119 if (!data)
9120 return ERR_PTR(-ENOMEM);
9121 data->server = server;
9122 nfs4_stateid_copy(&data->args.stateid, stateid);
9123
9124 task_setup.callback_data = data;
9125
9126 msg.rpc_argp = &data->args;
9127 msg.rpc_resp = &data->res;
76e8a1bd 9128 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
7c1d5fae
TM		 9129 if (privileged)
9130 nfs4_set_sequence_privileged(&data->args.seq_args);
9131
9132 return rpc_run_task(&task_setup);
9aeda35f
BS		 9133}
9134
38527b15
CL		 9135/**
9136 * nfs41_free_stateid - perform a FREE_STATEID operation
9137 *
9138 * @server: server / transport on which to perform the operation
9139 * @stateid: state ID to release
ab7cb0df 9140 * @cred: credential
f0b0bf88 9141 * @is_recovery: set to true if this call needs to be privileged
38527b15 9142 *
f0b0bf88 9143 * Note: this function is always asynchronous.
38527b15 9144 */
ab7cb0df 9145static int nfs41_free_stateid(struct nfs_server *server,
f0b0bf88
TM		 9146 const nfs4_stateid *stateid,
9147 struct rpc_cred *cred,
9148 bool is_recovery)
9aeda35f 9149{
7c1d5fae 9150 struct rpc_task *task;
7c1d5fae 9151
f0b0bf88 9152 task = _nfs41_free_stateid(server, stateid, cred, is_recovery);
7c1d5fae
TM		 9153 if (IS_ERR(task))
9154 return PTR_ERR(task);
7c1d5fae 9155 rpc_put_task(task);
f0b0bf88 9156 return 0;
9aeda35f 9157}
36281caa 9158
f1cdae87
JL		 9159static void
9160nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf 9161{
ab7cb0df 9162 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 9163
f0b0bf88 9164 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf 9165 nfs4_free_lock_state(server, lsp);
c8b2d0bf
TM		 9166}
9167
36281caa
TM		 9168static bool nfs41_match_stateid(const nfs4_stateid *s1,
9169 const nfs4_stateid *s2)
9170{
93b717fd
TM		 9171 if (s1->type != s2->type)
9172 return false;
9173
2d2f24ad 9174 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 9175 return false;
9176
2d2f24ad 9177 if (s1->seqid == s2->seqid)
36281caa 9178 return true;
2d2f24ad 9179 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 9180 return true;
9181
9182 return false;
9183}
9184
557134a3
AA		 9185#endif /* CONFIG_NFS_V4_1 */
9186
36281caa
TM		 9187static bool nfs4_match_stateid(const nfs4_stateid *s1,
9188 const nfs4_stateid *s2)
9189{
f597c537 9190 return nfs4_stateid_match(s1, s2);
36281caa
TM		 9191}
9192
9193
17280175 9194static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 9195 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 9196 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 9197 .recover_open = nfs4_open_reclaim,
9198 .recover_lock = nfs4_lock_reclaim,
591d71cb 9199 .establish_clid = nfs4_init_clientid,
05f4c350 9200 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 9201};
9202
591d71cb 9203#if defined(CONFIG_NFS_V4_1)
17280175 9204static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 9205 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9206 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9207 .recover_open = nfs4_open_reclaim,
9208 .recover_lock = nfs4_lock_reclaim,
4d643d1d 9209 .establish_clid = nfs41_init_clientid,
fce5c838 9210 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 9211 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 9212};
9213#endif /* CONFIG_NFS_V4_1 */
9214
17280175 9215static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 9216 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9217 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 9218 .recover_open = nfs40_open_expired,
591d71cb
AA		 9219 .recover_lock = nfs4_lock_expired,
9220 .establish_clid = nfs4_init_clientid,
9221};
9222
9223#if defined(CONFIG_NFS_V4_1)
17280175 9224static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 9225 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 9226 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 9227 .recover_open = nfs41_open_expired,
9228 .recover_lock = nfs41_lock_expired,
4d643d1d 9229 .establish_clid = nfs41_init_clientid,
1da177e4 9230};
591d71cb 9231#endif /* CONFIG_NFS_V4_1 */
1da177e4 9232
17280175 9233static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 9234 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 9235 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 9236 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 9237};
9238
9239#if defined(CONFIG_NFS_V4_1)
17280175 9240static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 9241 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 9242 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 9243 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 9244};
9245#endif
9246
ec011fe8 9247static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 9248 .get_locations = _nfs40_proc_get_locations,
44c99933 9249 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 9250};
9251
9252#if defined(CONFIG_NFS_V4_1)
9253static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 9254 .get_locations = _nfs41_proc_get_locations,
44c99933 9255 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 9256};
9257#endif /* CONFIG_NFS_V4_1 */
9258
97dc1359
TM		 9259static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
9260 .minor_version = 0,
39c6daae
TM		 9261 .init_caps = NFS_CAP_READDIRPLUS
9262 | NFS_CAP_ATOMIC_OPEN
39c6daae 9263 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 9264 .init_client = nfs40_init_client,
9265 .shutdown_client = nfs40_shutdown_client,
36281caa 9266 .match_stateid = nfs4_match_stateid,
fca78d6d 9267 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 9268 .free_lock_state = nfs4_release_lockowner,
45870d69 9269 .test_and_free_expired = nfs40_test_and_free_expired_stateid,
63f5f796 9270 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 9271 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 9272 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
9273 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
9274 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 9275 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 9276};
9277
9278#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 9279static struct nfs_seqid *
9280nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
9281{
9282 return NULL;
9283}
9284
97dc1359
TM		 9285static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
9286 .minor_version = 1,
39c6daae
TM		 9287 .init_caps = NFS_CAP_READDIRPLUS
9288 | NFS_CAP_ATOMIC_OPEN
3b66486c 9289 | NFS_CAP_POSIX_LOCK
49f9a0fa 9290 | NFS_CAP_STATEID_NFSV41
e983120e 9291 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 9292 .init_client = nfs41_init_client,
9293 .shutdown_client = nfs41_shutdown_client,
36281caa 9294 .match_stateid = nfs41_match_stateid,
fca78d6d 9295 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 9296 .free_lock_state = nfs41_free_lock_state,
45870d69 9297 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 9298 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 9299 .session_trunk = nfs4_test_session_trunk,
9915ea7e 9300 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 9301 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9302 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9303 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 9304 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 9305};
9306#endif
9307
42c2c424
SD		 9308#if defined(CONFIG_NFS_V4_2)
9309static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
9310 .minor_version = 2,
7017310a
BS		 9311 .init_caps = NFS_CAP_READDIRPLUS
9312 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 9313 | NFS_CAP_POSIX_LOCK
9314 | NFS_CAP_STATEID_NFSV41
e983120e 9315 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 9316 | NFS_CAP_ALLOCATE
2e72448b 9317 | NFS_CAP_COPY
624bd5b7 9318 | NFS_CAP_DEALLOCATE
6c5a0d89 9319 | NFS_CAP_SEEK
e5341f3a
PT		 9320 | NFS_CAP_LAYOUTSTATS
9321 | NFS_CAP_CLONE,
abf79bb3
CL		 9322 .init_client = nfs41_init_client,
9323 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 9324 .match_stateid = nfs41_match_stateid,
9325 .find_root_sec = nfs41_find_root_sec,
7017310a 9326 .free_lock_state = nfs41_free_lock_state,
9915ea7e 9327 .call_sync_ops = &nfs41_call_sync_ops,
45870d69 9328 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 9329 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 9330 .session_trunk = nfs4_test_session_trunk,
42c2c424
SD		 9331 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9332 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9333 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 9334 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 9335};
9336#endif
9337
97dc1359
TM		 9338const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
9339 [0] = &nfs_v4_0_minor_ops,
9340#if defined(CONFIG_NFS_V4_1)
9341 [1] = &nfs_v4_1_minor_ops,
9342#endif
42c2c424
SD		 9343#if defined(CONFIG_NFS_V4_2)
9344 [2] = &nfs_v4_2_minor_ops,
9345#endif
97dc1359
TM		 9346};
9347
13997823 9348static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
c4803c49
AG		 9349{
9350 ssize_t error, error2;
9351
9352 error = generic_listxattr(dentry, list, size);
9353 if (error < 0)
9354 return error;
9355 if (list) {
9356 list += error;
9357 size -= error;
9358 }
9359
9360 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
9361 if (error2 < 0)
9362 return error2;
9363 return error + error2;
9364}
9365
17f26b12 9366static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 9367 .create = nfs_create,
9368 .lookup = nfs_lookup,
9369 .atomic_open = nfs_atomic_open,
9370 .link = nfs_link,
9371 .unlink = nfs_unlink,
9372 .symlink = nfs_symlink,
9373 .mkdir = nfs_mkdir,
9374 .rmdir = nfs_rmdir,
9375 .mknod = nfs_mknod,
9376 .rename = nfs_rename,
9377 .permission = nfs_permission,
9378 .getattr = nfs_getattr,
9379 .setattr = nfs_setattr,
c4803c49 9380 .listxattr = nfs4_listxattr,
73a79706
BS		 9381};
9382
92e1d5be 9383static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 9384 .permission = nfs_permission,
9385 .getattr = nfs_getattr,
9386 .setattr = nfs_setattr,
c4803c49 9387 .listxattr = nfs4_listxattr,
6b3b5496
BF		 9388};
9389
509de811 9390const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 9391 .version = 4, /* protocol version */
9392 .dentry_ops = &nfs4_dentry_operations,
9393 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 9394 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 9395 .file_ops = &nfs4_file_operations,
1da177e4 9396 .getroot = nfs4_proc_get_root,
281cad46 9397 .submount = nfs4_submount,
ff9099f2 9398 .try_mount = nfs4_try_mount,
1da177e4
LT		 9399 .getattr = nfs4_proc_getattr,
9400 .setattr = nfs4_proc_setattr,
9401 .lookup = nfs4_proc_lookup,
9402 .access = nfs4_proc_access,
9403 .readlink = nfs4_proc_readlink,
1da177e4
LT		 9404 .create = nfs4_proc_create,
9405 .remove = nfs4_proc_remove,
9406 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 9407 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 9408 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 9409 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 9410 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 9411 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 9412 .link = nfs4_proc_link,
9413 .symlink = nfs4_proc_symlink,
9414 .mkdir = nfs4_proc_mkdir,
9415 .rmdir = nfs4_proc_remove,
9416 .readdir = nfs4_proc_readdir,
9417 .mknod = nfs4_proc_mknod,
9418 .statfs = nfs4_proc_statfs,
9419 .fsinfo = nfs4_proc_fsinfo,
9420 .pathconf = nfs4_proc_pathconf,
e9326dca 9421 .set_capabilities = nfs4_server_capabilities,
1da177e4 9422 .decode_dirent = nfs4_decode_dirent,
a4cdda59 9423 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 9424 .read_setup = nfs4_proc_read_setup,
ec06c096 9425 .read_done = nfs4_read_done,
1da177e4 9426 .write_setup = nfs4_proc_write_setup,
788e7a89 9427 .write_done = nfs4_write_done,
1da177e4 9428 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 9429 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 9430 .commit_done = nfs4_commit_done,
1da177e4 9431 .lock = nfs4_proc_lock,
e50a1c2e 9432 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 9433 .close_context = nfs4_close_context,
2b484297 9434 .open_context = nfs4_atomic_open,
011e2a7f 9435 .have_delegation = nfs4_have_delegation,
57ec14c5 9436 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 9437 .alloc_client = nfs4_alloc_client,
45a52a02 9438 .init_client = nfs4_init_client,
cdb7eced 9439 .free_client = nfs4_free_client,
1179acc6
BS		 9440 .create_server = nfs4_create_server,
9441 .clone_server = nfs_clone_server,
1da177e4
LT		 9442};
9443
64c2ce8b 9444static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
98e9cb57 9445 .name = XATTR_NAME_NFSV4_ACL,
64c2ce8b
AK		 9446 .list = nfs4_xattr_list_nfs4_acl,
9447 .get = nfs4_xattr_get_nfs4_acl,
9448 .set = nfs4_xattr_set_nfs4_acl,
9449};
9450
9451const struct xattr_handler *nfs4_xattr_handlers[] = {
9452 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 9453#ifdef CONFIG_NFS_V4_SECURITY_LABEL
9454 &nfs4_xattr_nfs4_label_handler,
9455#endif
64c2ce8b
AK		 9456 NULL
9457};
9458
1da177e4
LT		 9459/*
9460 * Local variables:
9461 * c-basic-offset: 8
9462 * End:
9463 */
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