]> git.proxmox.com Git - mirror_ubuntu-bionic-kernel.git/blame - fs/nfs/nfs4proc.c
projects / mirror_ubuntu-bionic-kernel.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
Merge tag 'rtc-4.10' of git://git.kernel.org/pub/scm/linux/kernel/git/abelloni/linux
[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;
2cf10cdd
TM		 819 case -NFS4ERR_DEADSESSION:
820 case -NFS4ERR_BADSESSION:
821 nfs4_schedule_session_recovery(session, res->sr_status);
822 goto retry_nowait;
14516c3a
TM		 823 default:
824 /* Just update the slot sequence no. */
07e8dcbd 825 slot->seq_done = 1;
b0df806c
AA		 826 }
827out:
828 /* The session may be reset by one of the error handlers. */
829 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
a13ce7c6 830out_noaction:
85563073 831 return ret;
e8794440
TM		 832retry_nowait:
833 if (rpc_restart_call_prepare(task)) {
2e80dbe7 834 nfs41_sequence_free_slot(res);
e8794440
TM		 835 task->tk_status = 0;
836 ret = 0;
837 }
838 goto out;
14516c3a 839out_retry:
d05dd4e9 840 if (!rpc_restart_call(task))
14516c3a
TM		 841 goto out;
842 rpc_delay(task, NFS4_POLL_RETRY_MAX);
843 return 0;
b0df806c 844}
2e80dbe7
TM		 845
846int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
847{
848 if (!nfs41_sequence_process(task, res))
849 return 0;
850 if (res->sr_slot != NULL)
851 nfs41_sequence_free_slot(res);
852 return 1;
853
854}
f9c96fcc 855EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 856
2e80dbe7
TM		 857static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
858{
859 if (res->sr_slot == NULL)
860 return 1;
861 if (res->sr_slot->table->session != NULL)
862 return nfs41_sequence_process(task, res);
863 return nfs40_sequence_done(task, res);
864}
865
866static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
867{
868 if (res->sr_slot != NULL) {
869 if (res->sr_slot->table->session != NULL)
870 nfs41_sequence_free_slot(res);
871 else
872 nfs40_sequence_free_slot(res);
873 }
874}
875
2c4b131d 876int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 877{
e3725ec0 878 if (res->sr_slot == NULL)
14516c3a 879 return 1;
3bd2384a
CL		 880 if (!res->sr_slot->table->session)
881 return nfs40_sequence_done(task, res);
14516c3a 882 return nfs41_sequence_done(task, res);
df896455 883}
2c4b131d 884EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 885
dc70d7b3 886int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 887 struct nfs4_sequence_args *args,
888 struct nfs4_sequence_res *res,
ce5039c1
AA		 889 struct rpc_task *task)
890{
fbcd4abc
AA		 891 struct nfs4_slot *slot;
892 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 893
894 dprintk("--> %s\n", __func__);
ce5039c1 895 /* slot already allocated? */
dfb4f309 896 if (res->sr_slot != NULL)
d9afbd1b 897 goto out_success;
ce5039c1 898
fbcd4abc
AA		 899 tbl = &session->fc_slot_table;
900
69d206b5
TM		 901 task->tk_timeout = 0;
902
fbcd4abc 903 spin_lock(&tbl->slot_tbl_lock);
774d5f14 904 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 905 !args->sa_privileged) {
0b1c8fc4 906 /* The state manager will wait until the slot table is empty */
0b1c8fc4 907 dprintk("%s session is draining\n", __func__);
7b939a3f 908 goto out_sleep;
689cf5c1
AB		 909 }
910
2dc03b7f 911 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 912 if (IS_ERR(slot)) {
913 /* If out of memory, try again in 1/4 second */
914 if (slot == ERR_PTR(-ENOMEM))
915 task->tk_timeout = HZ >> 2;
fbcd4abc 916 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 917 goto out_sleep;
fbcd4abc
AA		 918 }
919 spin_unlock(&tbl->slot_tbl_lock);
920
0a014a44 921 slot->privileged = args->sa_privileged ? 1 : 0;
2b2fa717 922 args->sa_slot = slot;
fbcd4abc 923
e8d92382 924 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 925 slot->slot_nr, slot->seq_nr);
fbcd4abc 926
dfb4f309 927 res->sr_slot = slot;
8e63b6a8 928 res->sr_timestamp = jiffies;
2a6e26cd 929 res->sr_status_flags = 0;
fbcd4abc
AA		 930 /*
931 * sr_status is only set in decode_sequence, and so will remain
932 * set to 1 if an rpc level failure occurs.
933 */
934 res->sr_status = 1;
2f92ae34 935 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 936out_success:
937 rpc_call_start(task);
ce5039c1 938 return 0;
7b939a3f 939out_sleep:
8fe72bac
TM		 940 /* Privileged tasks are queued with top priority */
941 if (args->sa_privileged)
1e1093c7
TM		 942 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
943 NULL, RPC_PRIORITY_PRIVILEGED);
944 else
945 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 946 spin_unlock(&tbl->slot_tbl_lock);
947 return -EAGAIN;
ce5039c1 948}
dc70d7b3 949EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 950
5a580e0a
CL		 951static int nfs4_setup_sequence(const struct nfs_server *server,
952 struct nfs4_sequence_args *args,
953 struct nfs4_sequence_res *res,
954 struct rpc_task *task)
ce5039c1 955{
035168ab 956 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 957 int ret = 0;
958
3bd2384a 959 if (!session)
cb04ad2a
PT		 960 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
961 args, res, task);
035168ab 962
e8d92382 963 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 964 __func__, session->clp, session, res->sr_slot ?
e8d92382 965 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 966
9d12b216 967 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 968
ce5039c1
AA		 969 dprintk("<-- %s status=%d\n", __func__, ret);
970 return ret;
971}
972
ce5039c1
AA		 973static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
974{
2a3eb2b9 975 struct nfs4_call_sync_data *data = calldata;
6ba7db34 976 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 977
035168ab
TM		 978 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
979
d9afbd1b 980 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 981}
982
69ab40c4
AA		 983static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
984{
2a3eb2b9 985 struct nfs4_call_sync_data *data = calldata;
69ab40c4 986
14516c3a 987 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 988}
989
17280175 990static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 991 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 992 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 993};
994
3bd2384a
CL		 995#else /* !CONFIG_NFS_V4_1 */
996
9915ea7e
CL		 997static int nfs4_setup_sequence(const struct nfs_server *server,
998 struct nfs4_sequence_args *args,
999 struct nfs4_sequence_res *res,
1000 struct rpc_task *task)
1001{
cb04ad2a
PT		 1002 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
1003 args, res, task);
9915ea7e
CL		 1004}
1005
2e80dbe7
TM		 1006static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
1007{
1008 return nfs40_sequence_done(task, res);
1009}
1010
1011static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
1012{
1013 if (res->sr_slot != NULL)
1014 nfs40_sequence_free_slot(res);
1015}
1016
2c4b131d
PT		 1017int nfs4_sequence_done(struct rpc_task *task,
1018 struct nfs4_sequence_res *res)
9915ea7e 1019{
3bd2384a 1020 return nfs40_sequence_done(task, res);
9915ea7e 1021}
2c4b131d 1022EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 1023
1024#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 1025
1026static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
1027{
1028 struct nfs4_call_sync_data *data = calldata;
1029 nfs4_setup_sequence(data->seq_server,
1030 data->seq_args, data->seq_res, task);
1031}
1032
1033static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
1034{
1035 struct nfs4_call_sync_data *data = calldata;
1036 nfs4_sequence_done(task, data->seq_res);
1037}
1038
1039static const struct rpc_call_ops nfs40_call_sync_ops = {
1040 .rpc_call_prepare = nfs40_call_sync_prepare,
1041 .rpc_call_done = nfs40_call_sync_done,
1042};
1043
7c513058
BS		 1044static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
1045 struct nfs_server *server,
ce5039c1
AA		 1046 struct rpc_message *msg,
1047 struct nfs4_sequence_args *args,
8fe72bac 1048 struct nfs4_sequence_res *res)
ce5039c1
AA		 1049{
1050 int ret;
1051 struct rpc_task *task;
9915ea7e 1052 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 1053 struct nfs4_call_sync_data data = {
035168ab 1054 .seq_server = server,
ce5039c1
AA		 1055 .seq_args = args,
1056 .seq_res = res,
ce5039c1
AA		 1057 };
1058 struct rpc_task_setup task_setup = {
7c513058 1059 .rpc_client = clnt,
ce5039c1 1060 .rpc_message = msg,
9915ea7e 1061 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 1062 .callback_data = &data
1063 };
1064
ce5039c1
AA		 1065 task = rpc_run_task(&task_setup);
1066 if (IS_ERR(task))
1067 ret = PTR_ERR(task);
1068 else {
1069 ret = task->tk_status;
1070 rpc_put_task(task);
1071 }
1072 return ret;
1073}
1074
7c513058
BS		 1075int nfs4_call_sync(struct rpc_clnt *clnt,
1076 struct nfs_server *server,
e73b83f2
BS		 1077 struct rpc_message *msg,
1078 struct nfs4_sequence_args *args,
1079 struct nfs4_sequence_res *res,
1080 int cache_reply)
1081{
a9c92d6b 1082 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 1083 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 1084}
cccef3b9 1085
38478b24 1086static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 1087{
38478b24 1088 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 1089
38478b24 1090 spin_lock(&dir->i_lock);
359d7d1c 1091 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 1092 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 1093 nfs_force_lookup_revalidate(dir);
a9a4a87a 1094 dir->i_version = cinfo->after;
3235b403 1095 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
de242c0b 1096 nfs_fscache_invalidate(dir);
38478b24 1097 spin_unlock(&dir->i_lock);
1da177e4
LT		 1098}
1099
e56e0b78 1100struct nfs4_opendata {
c6d00e63 1101 struct kref kref;
e56e0b78
TM		 1102 struct nfs_openargs o_arg;
1103 struct nfs_openres o_res;
cdd4e68b
TM		 1104 struct nfs_open_confirmargs c_arg;
1105 struct nfs_open_confirmres c_res;
6926afd1
TM		 1106 struct nfs4_string owner_name;
1107 struct nfs4_string group_name;
a49c2691 1108 struct nfs4_label *a_label;
e56e0b78 1109 struct nfs_fattr f_attr;
1775fd3e 1110 struct nfs4_label *f_label;
e56e0b78 1111 struct dentry *dir;
82a2c1b7 1112 struct dentry *dentry;
e56e0b78 1113 struct nfs4_state_owner *owner;
aac00a8d 1114 struct nfs4_state *state;
e56e0b78 1115 struct iattr attrs;
26e976a8 1116 unsigned long timestamp;
3e309914 1117 unsigned int rpc_done : 1;
5bc2afc2 1118 unsigned int file_created : 1;
bdeca1b7 1119 unsigned int is_recover : 1;
24ac23ab
TM		 1120 int rpc_status;
1121 int cancelled;
e56e0b78
TM		 1122};
1123
49f9a0fa
TM		 1124static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1125 int err, struct nfs4_exception *exception)
1126{
1127 if (err != -EINVAL)
1128 return false;
1129 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1130 return false;
1131 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1132 exception->retry = 1;
1133 return true;
1134}
1135
6ae37339
TM		 1136static u32
1137nfs4_map_atomic_open_share(struct nfs_server *server,
1138 fmode_t fmode, int openflags)
1139{
1140 u32 res = 0;
1141
1142 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1143 case FMODE_READ:
1144 res = NFS4_SHARE_ACCESS_READ;
1145 break;
1146 case FMODE_WRITE:
1147 res = NFS4_SHARE_ACCESS_WRITE;
1148 break;
1149 case FMODE_READ|FMODE_WRITE:
1150 res = NFS4_SHARE_ACCESS_BOTH;
1151 }
1152 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1153 goto out;
1154 /* Want no delegation if we're using O_DIRECT */
1155 if (openflags & O_DIRECT)
1156 res |= NFS4_SHARE_WANT_NO_DELEG;
1157out:
1158 return res;
1159}
1160
49f9a0fa
TM		 1161static enum open_claim_type4
1162nfs4_map_atomic_open_claim(struct nfs_server *server,
1163 enum open_claim_type4 claim)
1164{
1165 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1166 return claim;
1167 switch (claim) {
1168 default:
1169 return claim;
1170 case NFS4_OPEN_CLAIM_FH:
1171 return NFS4_OPEN_CLAIM_NULL;
1172 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1173 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1174 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1175 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1176 }
1177}
2ced46c2
TM		 1178
1179static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1180{
1181 p->o_res.f_attr = &p->f_attr;
1775fd3e 1182 p->o_res.f_label = p->f_label;
c1d51931
TM		 1183 p->o_res.seqid = p->o_arg.seqid;
1184 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 1185 p->o_res.server = p->o_arg.server;
5f657530 1186 p->o_res.access_request = p->o_arg.access;
2ced46c2 1187 nfs_fattr_init(&p->f_attr);
6926afd1 1188 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 1189}
1190
82a2c1b7 1191static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 1192 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 1193 const struct iattr *attrs,
1775fd3e 1194 struct nfs4_label *label,
4a1c0893 1195 enum open_claim_type4 claim,
8535b2be 1196 gfp_t gfp_mask)
e56e0b78 1197{
82a2c1b7 1198 struct dentry *parent = dget_parent(dentry);
2b0143b5 1199 struct inode *dir = d_inode(parent);
e56e0b78 1200 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1201 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 1202 struct nfs4_opendata *p;
1203
8535b2be 1204 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1205 if (p == NULL)
1206 goto err;
14c43f76
DQ		 1207
1208 p->f_label = nfs4_label_alloc(server, gfp_mask);
1209 if (IS_ERR(p->f_label))
1210 goto err_free_p;
1211
a49c2691
KM		 1212 p->a_label = nfs4_label_alloc(server, gfp_mask);
1213 if (IS_ERR(p->a_label))
1214 goto err_free_f;
1215
63f5f796
TM		 1216 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1217 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1218 if (IS_ERR(p->o_arg.seqid))
14c43f76 1219 goto err_free_label;
82a2c1b7
AV		 1220 nfs_sb_active(dentry->d_sb);
1221 p->dentry = dget(dentry);
e56e0b78
TM		 1222 p->dir = parent;
1223 p->owner = sp;
1224 atomic_inc(&sp->so_count);
dc0b027d
TM		 1225 p->o_arg.open_flags = flags;
1226 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
dff25ddb 1227 p->o_arg.umask = current_umask();
536585cc 1228 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
6ae37339
TM		 1229 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1230 fmode, flags);
ae2bb032
WAA		 1231 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1232 * will return permission denied for all bits until close */
1233 if (!(flags & O_EXCL)) {
1234 /* ask server to check for all possible rights as results
1235 * are cached */
536585cc
TM		 1236 switch (p->o_arg.claim) {
1237 default:
1238 break;
1239 case NFS4_OPEN_CLAIM_NULL:
1240 case NFS4_OPEN_CLAIM_FH:
1241 p->o_arg.access = NFS4_ACCESS_READ |
1242 NFS4_ACCESS_MODIFY |
1243 NFS4_ACCESS_EXTEND |
1244 NFS4_ACCESS_EXECUTE;
1245 }
ae2bb032 1246 }
7539bbab 1247 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1248 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1249 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1250 p->o_arg.name = &dentry->d_name;
e56e0b78 1251 p->o_arg.server = server;
aa9c2669 1252 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1253 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
a49c2691 1254 p->o_arg.label = nfs4_label_copy(p->a_label, label);
49f9a0fa 1255 switch (p->o_arg.claim) {
4a1c0893
TM		 1256 case NFS4_OPEN_CLAIM_NULL:
1257 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1258 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1259 p->o_arg.fh = NFS_FH(dir);
1260 break;
1261 case NFS4_OPEN_CLAIM_PREVIOUS:
1262 case NFS4_OPEN_CLAIM_FH:
1263 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1264 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1265 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1266 }
536e43d1 1267 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1268 __u32 verf[2];
d77d76ff 1269
e56e0b78
TM		 1270 p->o_arg.u.attrs = &p->attrs;
1271 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1272
1273 verf[0] = jiffies;
1274 verf[1] = current->pid;
1275 memcpy(p->o_arg.u.verifier.data, verf,
1276 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1277 }
cdd4e68b
TM		 1278 p->c_arg.fh = &p->o_res.fh;
1279 p->c_arg.stateid = &p->o_res.stateid;
1280 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1281 nfs4_init_opendata_res(p);
c6d00e63 1282 kref_init(&p->kref);
e56e0b78 1283 return p;
14c43f76
DQ		 1284
1285err_free_label:
a49c2691
KM		 1286 nfs4_label_free(p->a_label);
1287err_free_f:
14c43f76
DQ		 1288 nfs4_label_free(p->f_label);
1289err_free_p:
e56e0b78
TM		 1290 kfree(p);
1291err:
1292 dput(parent);
1293 return NULL;
1294}
1295
c6d00e63 1296static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1297{
c6d00e63
TM		 1298 struct nfs4_opendata *p = container_of(kref,
1299 struct nfs4_opendata, kref);
82a2c1b7 1300 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1301
1302 nfs_free_seqid(p->o_arg.seqid);
2e80dbe7 1303 nfs4_sequence_free_slot(&p->o_res.seq_res);
aac00a8d
TM		 1304 if (p->state != NULL)
1305 nfs4_put_open_state(p->state);
c6d00e63 1306 nfs4_put_state_owner(p->owner);
14c43f76 1307
a49c2691 1308 nfs4_label_free(p->a_label);
14c43f76
DQ		 1309 nfs4_label_free(p->f_label);
1310
c6d00e63 1311 dput(p->dir);
82a2c1b7
AV		 1312 dput(p->dentry);
1313 nfs_sb_deactive(sb);
6926afd1 1314 nfs_fattr_free_names(&p->f_attr);
e911b815 1315 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1316 kfree(p);
1317}
1318
1319static void nfs4_opendata_put(struct nfs4_opendata *p)
1320{
1321 if (p != NULL)
1322 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1323}
1324
06f814a3
TM		 1325static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1326{
06f814a3
TM		 1327 int ret;
1328
06f814a3 1329 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1330 return ret;
1331}
1332
24311f88
TM		 1333static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1334 fmode_t fmode)
1335{
1336 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1337 case FMODE_READ|FMODE_WRITE:
1338 return state->n_rdwr != 0;
1339 case FMODE_WRITE:
1340 return state->n_wronly != 0;
1341 case FMODE_READ:
1342 return state->n_rdonly != 0;
1343 }
1344 WARN_ON_ONCE(1);
1345 return false;
1346}
1347
dc0b027d 1348static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1349{
1350 int ret = 0;
dc0b027d 1351
536e43d1 1352 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1353 goto out;
1354 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1355 case FMODE_READ:
88069f77
TM		 1356 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1357 && state->n_rdonly != 0;
6ee41268
TM		 1358 break;
1359 case FMODE_WRITE:
88069f77
TM		 1360 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1361 && state->n_wronly != 0;
6ee41268
TM		 1362 break;
1363 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1364 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1365 && state->n_rdwr != 0;
6ee41268 1366 }
dc0b027d 1367out:
6ee41268
TM		 1368 return ret;
1369}
1370
2a606188
TM		 1371static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1372 enum open_claim_type4 claim)
aac00a8d 1373{
652f89f6
TM		 1374 if (delegation == NULL)
1375 return 0;
dc0b027d 1376 if ((delegation->type & fmode) != fmode)
aac00a8d 1377 return 0;
d25be546
TM		 1378 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1379 return 0;
2a606188
TM		 1380 switch (claim) {
1381 case NFS4_OPEN_CLAIM_NULL:
1382 case NFS4_OPEN_CLAIM_FH:
1383 break;
1384 case NFS4_OPEN_CLAIM_PREVIOUS:
1385 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1386 break;
1387 default:
1388 return 0;
1389 }
b7391f44 1390 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1391 return 1;
1392}
1393
dc0b027d 1394static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1395{
dc0b027d 1396 switch (fmode) {
e7616923
TM		 1397 case FMODE_WRITE:
1398 state->n_wronly++;
1399 break;
1400 case FMODE_READ:
1401 state->n_rdonly++;
1402 break;
1403 case FMODE_READ|FMODE_WRITE:
1404 state->n_rdwr++;
1405 }
dc0b027d 1406 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1407}
1408
8a64c4ef
TM		 1409#ifdef CONFIG_NFS_V4_1
1410static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state)
1411{
1412 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags))
1413 return true;
1414 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags))
1415 return true;
1416 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags))
1417 return true;
1418 return false;
1419}
1420#endif /* CONFIG_NFS_V4_1 */
1421
4f14c194
TM		 1422static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1423{
1424 struct nfs_client *clp = state->owner->so_server->nfs_client;
1425 bool need_recover = false;
1426
1427 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1428 need_recover = true;
1429 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1430 need_recover = true;
1431 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1432 need_recover = true;
1433 if (need_recover)
1434 nfs4_state_mark_reclaim_nograce(clp, state);
1435}
1436
e999e80e 1437static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1393d961 1438 const nfs4_stateid *stateid, nfs4_stateid *freeme)
e999e80e
TM		 1439{
1440 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1441 return true;
4f14c194 1442 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1393d961 1443 nfs4_stateid_copy(freeme, &state->open_stateid);
4f14c194 1444 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1445 return true;
4f14c194 1446 }
e999e80e
TM		 1447 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1448 return true;
1449 return false;
1450}
1451
f95549cf
TM		 1452static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1453{
3c38cbe2
TM		 1454 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1455 return;
f95549cf
TM		 1456 if (state->n_wronly)
1457 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1458 if (state->n_rdonly)
1459 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1460 if (state->n_rdwr)
1461 set_bit(NFS_O_RDWR_STATE, &state->flags);
3c38cbe2 1462 set_bit(NFS_OPEN_STATE, &state->flags);
f95549cf
TM		 1463}
1464
226056c5
TM		 1465static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1466 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1467{
226056c5
TM		 1468 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1469 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1470 case FMODE_WRITE:
1471 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1472 break;
1473 case FMODE_READ:
1474 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1475 break;
1476 case 0:
1477 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1478 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1479 clear_bit(NFS_OPEN_STATE, &state->flags);
1480 }
1481 if (stateid == NULL)
1482 return;
3e7dfb16
TM		 1483 /* Handle OPEN+OPEN_DOWNGRADE races */
1484 if (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1485 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
f95549cf 1486 nfs_resync_open_stateid_locked(state);
226056c5 1487 return;
f95549cf 1488 }
003707c7 1489 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1490 nfs4_stateid_copy(&state->stateid, stateid);
1491 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1492}
1493
4a1e2feb
TM		 1494static void nfs_clear_open_stateid(struct nfs4_state *state,
1495 nfs4_stateid *arg_stateid,
1496 nfs4_stateid *stateid, fmode_t fmode)
226056c5
TM		 1497{
1498 write_seqlock(&state->seqlock);
3e7dfb16
TM		 1499 /* Ignore, if the CLOSE argment doesn't match the current stateid */
1500 if (nfs4_state_match_open_stateid_other(state, arg_stateid))
1501 nfs_clear_open_stateid_locked(state, stateid, fmode);
226056c5 1502 write_sequnlock(&state->seqlock);
4f14c194
TM		 1503 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1504 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1505}
1506
1393d961
TM		 1507static void nfs_set_open_stateid_locked(struct nfs4_state *state,
1508 const nfs4_stateid *stateid, fmode_t fmode,
1509 nfs4_stateid *freeme)
003707c7 1510{
dc0b027d 1511 switch (fmode) {
003707c7
TM		 1512 case FMODE_READ:
1513 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1514 break;
1515 case FMODE_WRITE:
1516 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1517 break;
1518 case FMODE_READ|FMODE_WRITE:
1519 set_bit(NFS_O_RDWR_STATE, &state->flags);
1520 }
1393d961 1521 if (!nfs_need_update_open_stateid(state, stateid, freeme))
e999e80e
TM		 1522 return;
1523 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1524 nfs4_stateid_copy(&state->stateid, stateid);
1525 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1526}
1527
1393d961
TM		 1528static void __update_open_stateid(struct nfs4_state *state,
1529 const nfs4_stateid *open_stateid,
1530 const nfs4_stateid *deleg_stateid,
1531 fmode_t fmode,
1532 nfs4_stateid *freeme)
1da177e4 1533{
8bda4e4c
TM		 1534 /*
1535 * Protect the call to nfs4_state_set_mode_locked and
1536 * serialise the stateid update
1537 */
361cad3c 1538 spin_lock(&state->owner->so_lock);
8bda4e4c 1539 write_seqlock(&state->seqlock);
003707c7 1540 if (deleg_stateid != NULL) {
f597c537 1541 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1542 set_bit(NFS_DELEGATED_STATE, &state->flags);
1543 }
1544 if (open_stateid != NULL)
1393d961 1545 nfs_set_open_stateid_locked(state, open_stateid, fmode, freeme);
8bda4e4c 1546 write_sequnlock(&state->seqlock);
dc0b027d 1547 update_open_stateflags(state, fmode);
ec073428 1548 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1549}
1550
1393d961
TM		 1551static int update_open_stateid(struct nfs4_state *state,
1552 const nfs4_stateid *open_stateid,
1553 const nfs4_stateid *delegation,
1554 fmode_t fmode)
34310430 1555{
1393d961
TM		 1556 struct nfs_server *server = NFS_SERVER(state->inode);
1557 struct nfs_client *clp = server->nfs_client;
34310430
TM		 1558 struct nfs_inode *nfsi = NFS_I(state->inode);
1559 struct nfs_delegation *deleg_cur;
83aa3e0f 1560 nfs4_stateid freeme = { };
34310430
TM		 1561 int ret = 0;
1562
dc0b027d 1563 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1564
1565 rcu_read_lock();
1566 deleg_cur = rcu_dereference(nfsi->delegation);
1567 if (deleg_cur == NULL)
1568 goto no_delegation;
1569
1570 spin_lock(&deleg_cur->lock);
17f26b12 1571 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1572 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1573 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1574 goto no_delegation_unlock;
1575
1576 if (delegation == NULL)
1577 delegation = &deleg_cur->stateid;
f597c537 1578 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1579 goto no_delegation_unlock;
1580
b7391f44 1581 nfs_mark_delegation_referenced(deleg_cur);
1393d961
TM		 1582 __update_open_stateid(state, open_stateid, &deleg_cur->stateid,
1583 fmode, &freeme);
34310430
TM		 1584 ret = 1;
1585no_delegation_unlock:
1586 spin_unlock(&deleg_cur->lock);
1587no_delegation:
1588 rcu_read_unlock();
1589
1590 if (!ret && open_stateid != NULL) {
1393d961 1591 __update_open_stateid(state, open_stateid, NULL, fmode, &freeme);
34310430
TM		 1592 ret = 1;
1593 }
4f14c194 1594 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1393d961
TM		 1595 nfs4_schedule_state_manager(clp);
1596 if (freeme.type != 0)
1597 nfs4_test_and_free_stateid(server, &freeme,
1598 state->owner->so_cred);
34310430
TM		 1599
1600 return ret;
1601}
1602
39071e6f
TM		 1603static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1604 const nfs4_stateid *stateid)
1605{
1606 struct nfs4_state *state = lsp->ls_state;
1607 bool ret = false;
1608
1609 spin_lock(&state->state_lock);
1610 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1611 goto out_noupdate;
1612 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1613 goto out_noupdate;
1614 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1615 ret = true;
1616out_noupdate:
1617 spin_unlock(&state->state_lock);
1618 return ret;
1619}
34310430 1620
dc0b027d 1621static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1622{
1623 struct nfs_delegation *delegation;
1624
1625 rcu_read_lock();
1626 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1627 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1628 rcu_read_unlock();
1629 return;
1630 }
1631 rcu_read_unlock();
57ec14c5 1632 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1633}
1634
6ee41268 1635static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1636{
1637 struct nfs4_state *state = opendata->state;
1638 struct nfs_inode *nfsi = NFS_I(state->inode);
1639 struct nfs_delegation *delegation;
f448badd 1640 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1641 fmode_t fmode = opendata->o_arg.fmode;
2a606188 1642 enum open_claim_type4 claim = opendata->o_arg.claim;
aac00a8d
TM		 1643 nfs4_stateid stateid;
1644 int ret = -EAGAIN;
1645
aac00a8d 1646 for (;;) {
61beef75 1647 spin_lock(&state->owner->so_lock);
dc0b027d 1648 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1649 update_open_stateflags(state, fmode);
6ee41268 1650 spin_unlock(&state->owner->so_lock);
61beef75 1651 goto out_return_state;
6ee41268 1652 }
61beef75 1653 spin_unlock(&state->owner->so_lock);
34310430
TM		 1654 rcu_read_lock();
1655 delegation = rcu_dereference(nfsi->delegation);
2a606188 1656 if (!can_open_delegated(delegation, fmode, claim)) {
34310430 1657 rcu_read_unlock();
aac00a8d 1658 break;
34310430 1659 }
aac00a8d 1660 /* Save the delegation */
f597c537 1661 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1662 rcu_read_unlock();
fa332941 1663 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1664 if (!opendata->is_recover) {
1665 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1666 if (ret != 0)
1667 goto out;
1668 }
aac00a8d 1669 ret = -EAGAIN;
34310430
TM		 1670
1671 /* Try to update the stateid using the delegation */
dc0b027d 1672 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1673 goto out_return_state;
aac00a8d 1674 }
aac00a8d
TM		 1675out:
1676 return ERR_PTR(ret);
1677out_return_state:
1678 atomic_inc(&state->count);
1679 return state;
1680}
1681
e23008ec
AA		 1682static void
1683nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1684{
1685 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1686 struct nfs_delegation *delegation;
1687 int delegation_flags = 0;
1688
1689 rcu_read_lock();
1690 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1691 if (delegation)
1692 delegation_flags = delegation->flags;
1693 rcu_read_unlock();
72d79ff8
TM		 1694 switch (data->o_arg.claim) {
1695 default:
1696 break;
1697 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1698 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
e23008ec
AA		 1699 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1700 "returning a delegation for "
1701 "OPEN(CLAIM_DELEGATE_CUR)\n",
1702 clp->cl_hostname);
72d79ff8
TM		 1703 return;
1704 }
1705 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
e23008ec
AA		 1706 nfs_inode_set_delegation(state->inode,
1707 data->owner->so_cred,
1708 &data->o_res);
1709 else
1710 nfs_inode_reclaim_delegation(state->inode,
1711 data->owner->so_cred,
1712 &data->o_res);
1713}
1714
1715/*
1716 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1717 * and update the nfs4_state.
1718 */
1719static struct nfs4_state *
1720_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1721{
1722 struct inode *inode = data->state->inode;
1723 struct nfs4_state *state = data->state;
1724 int ret;
1725
d2bfda2e
WAA		 1726 if (!data->rpc_done) {
1727 if (data->rpc_status) {
1728 ret = data->rpc_status;
1729 goto err;
1730 }
1731 /* cached opens have already been processed */
1732 goto update;
e23008ec
AA		 1733 }
1734
e23008ec
AA		 1735 ret = nfs_refresh_inode(inode, &data->f_attr);
1736 if (ret)
1737 goto err;
1738
1739 if (data->o_res.delegation_type != 0)
1740 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1741update:
e23008ec
AA		 1742 update_open_stateid(state, &data->o_res.stateid, NULL,
1743 data->o_arg.fmode);
d49f042a 1744 atomic_inc(&state->count);
e23008ec
AA		 1745
1746 return state;
1747err:
1748 return ERR_PTR(ret);
1749
1750}
1751
1752static struct nfs4_state *
1753_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1754{
1755 struct inode *inode;
1756 struct nfs4_state *state = NULL;
1b370bc2 1757 int ret;
24ac23ab 1758
aac00a8d 1759 if (!data->rpc_done) {
6ee41268 1760 state = nfs4_try_open_cached(data);
9759b0fb 1761 trace_nfs4_cached_open(data->state);
aac00a8d
TM		 1762 goto out;
1763 }
1764
1b370bc2 1765 ret = -EAGAIN;
24ac23ab 1766 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1767 goto err;
1775fd3e 1768 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1769 ret = PTR_ERR(inode);
03f28e3a 1770 if (IS_ERR(inode))
1b370bc2
TM		 1771 goto err;
1772 ret = -ENOMEM;
24ac23ab
TM		 1773 state = nfs4_get_open_state(inode, data->owner);
1774 if (state == NULL)
1b370bc2 1775 goto err_put_inode;
e23008ec
AA		 1776 if (data->o_res.delegation_type != 0)
1777 nfs4_opendata_check_deleg(data, state);
34310430 1778 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1779 data->o_arg.fmode);
24ac23ab 1780 iput(inode);
aac00a8d 1781out:
7aa262b5 1782 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1783 return state;
1b370bc2
TM		 1784err_put_inode:
1785 iput(inode);
1786err:
1787 return ERR_PTR(ret);
24ac23ab
TM		 1788}
1789
e23008ec
AA		 1790static struct nfs4_state *
1791nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1792{
2e80dbe7
TM		 1793 struct nfs4_state *ret;
1794
e23008ec 1795 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
2e80dbe7
TM		 1796 ret =_nfs4_opendata_reclaim_to_nfs4_state(data);
1797 else
1798 ret = _nfs4_opendata_to_nfs4_state(data);
1799 nfs4_sequence_free_slot(&data->o_res.seq_res);
1800 return ret;
e23008ec
AA		 1801}
1802
864472e9
TM		 1803static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1804{
1805 struct nfs_inode *nfsi = NFS_I(state->inode);
1806 struct nfs_open_context *ctx;
1807
1808 spin_lock(&state->inode->i_lock);
1809 list_for_each_entry(ctx, &nfsi->open_files, list) {
1810 if (ctx->state != state)
1811 continue;
1812 get_nfs_open_context(ctx);
1813 spin_unlock(&state->inode->i_lock);
1814 return ctx;
1815 }
1816 spin_unlock(&state->inode->i_lock);
1817 return ERR_PTR(-ENOENT);
1818}
1819
4a1c0893
TM		 1820static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1821 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1822{
1823 struct nfs4_opendata *opendata;
1824
4a1c0893 1825 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1826 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1827 if (opendata == NULL)
1828 return ERR_PTR(-ENOMEM);
1829 opendata->state = state;
1830 atomic_inc(&state->count);
1831 return opendata;
1832}
1833
24311f88
TM		 1834static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1835 fmode_t fmode)
864472e9 1836{
2ced46c2 1837 struct nfs4_state *newstate;
864472e9
TM		 1838 int ret;
1839
24311f88 1840 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
39f897fd 1841 return 0;
dc0b027d
TM		 1842 opendata->o_arg.open_flags = 0;
1843 opendata->o_arg.fmode = fmode;
be36e185
TM		 1844 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1845 NFS_SB(opendata->dentry->d_sb),
1846 fmode, 0);
2ced46c2
TM		 1847 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1848 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1849 nfs4_init_opendata_res(opendata);
b257957e 1850 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1851 if (ret != 0)
1852 return ret;
2ced46c2 1853 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1854 if (IS_ERR(newstate))
1855 return PTR_ERR(newstate);
24311f88
TM		 1856 if (newstate != opendata->state)
1857 ret = -ESTALE;
643168c2 1858 nfs4_close_state(newstate, fmode);
24311f88 1859 return ret;
864472e9
TM		 1860}
1861
1862static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1863{
864472e9
TM		 1864 int ret;
1865
4f14c194
TM		 1866 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1867 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1868 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1869 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1870 /* memory barrier prior to reading state->n_* */
2ced46c2 1871 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1872 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9 1873 smp_rmb();
24311f88
TM		 1874 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1875 if (ret != 0)
1876 return ret;
1877 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1878 if (ret != 0)
1879 return ret;
1880 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1881 if (ret != 0)
1882 return ret;
1ac7e2fd
TM		 1883 /*
1884 * We may have performed cached opens for all three recoveries.
1885 * Check if we need to update the current stateid.
1886 */
1887 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1888 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1889 write_seqlock(&state->seqlock);
1ac7e2fd 1890 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1891 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1892 write_sequnlock(&state->seqlock);
1ac7e2fd 1893 }
864472e9
TM		 1894 return 0;
1895}
1896
1da177e4
LT		 1897/*
1898 * OPEN_RECLAIM:
1899 * reclaim state on the server after a reboot.
1da177e4 1900 */
539cd03a 1901static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1902{
1ac7e2fd 1903 struct nfs_delegation *delegation;
864472e9 1904 struct nfs4_opendata *opendata;
dc0b027d 1905 fmode_t delegation_type = 0;
1da177e4
LT		 1906 int status;
1907
4a1c0893
TM		 1908 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1909 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1910 if (IS_ERR(opendata))
1911 return PTR_ERR(opendata);
1ac7e2fd
TM		 1912 rcu_read_lock();
1913 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1914 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1915 delegation_type = delegation->type;
1ac7e2fd 1916 rcu_read_unlock();
864472e9
TM		 1917 opendata->o_arg.u.delegation_type = delegation_type;
1918 status = nfs4_open_recover(opendata, state);
c6d00e63 1919 nfs4_opendata_put(opendata);
1da177e4
LT		 1920 return status;
1921}
1922
539cd03a 1923static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1924{
1925 struct nfs_server *server = NFS_SERVER(state->inode);
1926 struct nfs4_exception exception = { };
1927 int err;
1928 do {
539cd03a 1929 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1930 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1931 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1932 continue;
168667c4 1933 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1934 break;
1935 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1936 } while (exception.retry);
1937 return err;
1938}
1939
864472e9
TM		 1940static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1941{
1942 struct nfs_open_context *ctx;
1943 int ret;
1944
1945 ctx = nfs4_state_find_open_context(state);
1946 if (IS_ERR(ctx))
91876b13 1947 return -EAGAIN;
539cd03a 1948 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1949 put_nfs_open_context(ctx);
1950 return ret;
1951}
1952
db4f2e63 1953static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1954{
be76b5b6
TM		 1955 switch (err) {
1956 default:
1957 printk(KERN_ERR "NFS: %s: unhandled error "
1958 "%d.\n", __func__, err);
1959 case 0:
1960 case -ENOENT:
8eee52af 1961 case -EAGAIN:
be76b5b6
TM		 1962 case -ESTALE:
1963 break;
1964 case -NFS4ERR_BADSESSION:
1965 case -NFS4ERR_BADSLOT:
1966 case -NFS4ERR_BAD_HIGH_SLOT:
1967 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1968 case -NFS4ERR_DEADSESSION:
1969 set_bit(NFS_DELEGATED_STATE, &state->flags);
1970 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1971 return -EAGAIN;
1972 case -NFS4ERR_STALE_CLIENTID:
1973 case -NFS4ERR_STALE_STATEID:
1974 set_bit(NFS_DELEGATED_STATE, &state->flags);
be76b5b6
TM		 1975 /* Don't recall a delegation if it was lost */
1976 nfs4_schedule_lease_recovery(server->nfs_client);
1977 return -EAGAIN;
352297b9
CL		 1978 case -NFS4ERR_MOVED:
1979 nfs4_schedule_migration_recovery(server);
1980 return -EAGAIN;
8ef2f8d4
CL		 1981 case -NFS4ERR_LEASE_MOVED:
1982 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1983 return -EAGAIN;
be76b5b6
TM		 1984 case -NFS4ERR_DELEG_REVOKED:
1985 case -NFS4ERR_ADMIN_REVOKED:
404ea356 1986 case -NFS4ERR_EXPIRED:
be76b5b6 1987 case -NFS4ERR_BAD_STATEID:
db4f2e63 1988 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1989 nfs_inode_find_state_and_recover(state->inode,
1990 stateid);
1991 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1992 return -EAGAIN;
be76b5b6
TM		 1993 case -NFS4ERR_DELAY:
1994 case -NFS4ERR_GRACE:
1995 set_bit(NFS_DELEGATED_STATE, &state->flags);
1996 ssleep(1);
1997 return -EAGAIN;
db4f2e63
TM		 1998 case -ENOMEM:
1999 case -NFS4ERR_DENIED:
2000 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
2001 return 0;
be76b5b6 2002 }
1da177e4
LT		 2003 return err;
2004}
2005
24311f88
TM		 2006int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
2007 struct nfs4_state *state, const nfs4_stateid *stateid,
2008 fmode_t type)
db4f2e63
TM		 2009{
2010 struct nfs_server *server = NFS_SERVER(state->inode);
2011 struct nfs4_opendata *opendata;
24311f88 2012 int err = 0;
db4f2e63
TM		 2013
2014 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2015 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
2016 if (IS_ERR(opendata))
2017 return PTR_ERR(opendata);
2018 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
5e99b532
JL		 2019 write_seqlock(&state->seqlock);
2020 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2021 write_sequnlock(&state->seqlock);
24311f88
TM		 2022 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2023 switch (type & (FMODE_READ|FMODE_WRITE)) {
2024 case FMODE_READ|FMODE_WRITE:
2025 case FMODE_WRITE:
2026 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
2027 if (err)
2028 break;
2029 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
2030 if (err)
2031 break;
2032 case FMODE_READ:
2033 err = nfs4_open_recover_helper(opendata, FMODE_READ);
2034 }
db4f2e63
TM		 2035 nfs4_opendata_put(opendata);
2036 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
2037}
2038
be05c860
CL		 2039static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
2040{
2041 struct nfs4_opendata *data = calldata;
2042
cb04ad2a
PT		 2043 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
2044 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 2045}
2046
cdd4e68b
TM		 2047static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
2048{
2049 struct nfs4_opendata *data = calldata;
2050
17ead6c8 2051 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 2052
cdd4e68b 2053 data->rpc_status = task->tk_status;
26e976a8 2054 if (data->rpc_status == 0) {
f597c537 2055 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 2056 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 2057 renew_lease(data->o_res.server, data->timestamp);
3e309914 2058 data->rpc_done = 1;
26e976a8 2059 }
cdd4e68b
TM		 2060}
2061
2062static void nfs4_open_confirm_release(void *calldata)
2063{
2064 struct nfs4_opendata *data = calldata;
2065 struct nfs4_state *state = NULL;
2066
2067 /* If this request hasn't been cancelled, do nothing */
2068 if (data->cancelled == 0)
2069 goto out_free;
2070 /* In case of error, no cleanup! */
3e309914 2071 if (!data->rpc_done)
cdd4e68b 2072 goto out_free;
cdd4e68b 2073 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2074 if (!IS_ERR(state))
643168c2 2075 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 2076out_free:
c6d00e63 2077 nfs4_opendata_put(data);
cdd4e68b
TM		 2078}
2079
2080static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 2081 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 2082 .rpc_call_done = nfs4_open_confirm_done,
2083 .rpc_release = nfs4_open_confirm_release,
2084};
2085
2086/*
2087 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
2088 */
2089static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
2090{
2b0143b5 2091 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 2092 struct rpc_task *task;
5138fde0
TM		 2093 struct rpc_message msg = {
2094 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
2095 .rpc_argp = &data->c_arg,
2096 .rpc_resp = &data->c_res,
2097 .rpc_cred = data->owner->so_cred,
2098 };
c970aa85
TM		 2099 struct rpc_task_setup task_setup_data = {
2100 .rpc_client = server->client,
5138fde0 2101 .rpc_message = &msg,
c970aa85
TM		 2102 .callback_ops = &nfs4_open_confirm_ops,
2103 .callback_data = data,
101070ca 2104 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2105 .flags = RPC_TASK_ASYNC,
2106 };
1da177e4
LT		 2107 int status;
2108
17ead6c8 2109 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 2110 kref_get(&data->kref);
3e309914
TM		 2111 data->rpc_done = 0;
2112 data->rpc_status = 0;
5138fde0 2113 data->timestamp = jiffies;
e92c1e0d
BC		 2114 if (data->is_recover)
2115 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
c970aa85 2116 task = rpc_run_task(&task_setup_data);
7a1218a2 2117 if (IS_ERR(task))
cdd4e68b 2118 return PTR_ERR(task);
cdd4e68b
TM		 2119 status = nfs4_wait_for_completion_rpc_task(task);
2120 if (status != 0) {
2121 data->cancelled = 1;
2122 smp_wmb();
2123 } else
2124 status = data->rpc_status;
e6b3c4db 2125 rpc_put_task(task);
1da177e4
LT		 2126 return status;
2127}
2128
24ac23ab 2129static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 2130{
24ac23ab
TM		 2131 struct nfs4_opendata *data = calldata;
2132 struct nfs4_state_owner *sp = data->owner;
549b19cc 2133 struct nfs_client *clp = sp->so_server->nfs_client;
2a606188 2134 enum open_claim_type4 claim = data->o_arg.claim;
5138fde0 2135
24ac23ab 2136 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 2137 goto out_wait;
aac00a8d
TM		 2138 /*
2139 * Check if we still need to send an OPEN call, or if we can use
2140 * a delegation instead.
2141 */
2142 if (data->state != NULL) {
2143 struct nfs_delegation *delegation;
2144
dc0b027d 2145 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 2146 goto out_no_action;
aac00a8d
TM		 2147 rcu_read_lock();
2148 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2a606188 2149 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
652f89f6 2150 goto unlock_no_action;
aac00a8d
TM		 2151 rcu_read_unlock();
2152 }
95b72eb0 2153 /* Update client id. */
549b19cc 2154 data->o_arg.clientid = clp->cl_clientid;
2a606188
TM		 2155 switch (claim) {
2156 default:
2157 break;
8188df17
TM		 2158 case NFS4_OPEN_CLAIM_PREVIOUS:
2159 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2160 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 2161 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 2162 case NFS4_OPEN_CLAIM_FH:
2163 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 2164 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
2165 }
26e976a8 2166 data->timestamp = jiffies;
035168ab 2167 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 2168 &data->o_arg.seq_args,
2240a9e2
TM		 2169 &data->o_res.seq_res,
2170 task) != 0)
2171 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 2172
2173 /* Set the create mode (note dependency on the session type) */
2174 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2175 if (data->o_arg.open_flags & O_EXCL) {
2176 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2177 if (nfs4_has_persistent_session(clp))
2178 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2179 else if (clp->cl_mvops->minor_version > 0)
2180 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2181 }
6ee41268 2182 return;
652f89f6 2183unlock_no_action:
9759b0fb 2184 trace_nfs4_cached_open(data->state);
652f89f6 2185 rcu_read_unlock();
6ee41268
TM		 2186out_no_action:
2187 task->tk_action = NULL;
c8da19b9 2188out_wait:
b75ad4cd 2189 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 2190}
2191
24ac23ab
TM		 2192static void nfs4_open_done(struct rpc_task *task, void *calldata)
2193{
2194 struct nfs4_opendata *data = calldata;
1da177e4 2195
24ac23ab 2196 data->rpc_status = task->tk_status;
d898528c 2197
2e80dbe7 2198 if (!nfs4_sequence_process(task, &data->o_res.seq_res))
14516c3a 2199 return;
d898528c 2200
24ac23ab 2201 if (task->tk_status == 0) {
807d66d8
TM		 2202 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2203 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 2204 case S_IFREG:
2205 break;
2206 case S_IFLNK:
24ac23ab 2207 data->rpc_status = -ELOOP;
6f926b5b
TM		 2208 break;
2209 case S_IFDIR:
24ac23ab 2210 data->rpc_status = -EISDIR;
6f926b5b
TM		 2211 break;
2212 default:
24ac23ab 2213 data->rpc_status = -ENOTDIR;
807d66d8 2214 }
6f926b5b 2215 }
26e976a8 2216 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 2217 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2218 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 2219 }
3e309914 2220 data->rpc_done = 1;
24ac23ab 2221}
6f926b5b 2222
24ac23ab
TM		 2223static void nfs4_open_release(void *calldata)
2224{
2225 struct nfs4_opendata *data = calldata;
2226 struct nfs4_state *state = NULL;
2227
2228 /* If this request hasn't been cancelled, do nothing */
2229 if (data->cancelled == 0)
2230 goto out_free;
2231 /* In case of error, no cleanup! */
3e309914 2232 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 2233 goto out_free;
2234 /* In case we need an open_confirm, no cleanup! */
2235 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2236 goto out_free;
24ac23ab 2237 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2238 if (!IS_ERR(state))
643168c2 2239 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 2240out_free:
c6d00e63 2241 nfs4_opendata_put(data);
24ac23ab
TM		 2242}
2243
2244static const struct rpc_call_ops nfs4_open_ops = {
2245 .rpc_call_prepare = nfs4_open_prepare,
2246 .rpc_call_done = nfs4_open_done,
2247 .rpc_release = nfs4_open_release,
2248};
2249
b257957e 2250static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab 2251{
2b0143b5 2252 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 2253 struct nfs_server *server = NFS_SERVER(dir);
2254 struct nfs_openargs *o_arg = &data->o_arg;
2255 struct nfs_openres *o_res = &data->o_res;
2256 struct rpc_task *task;
5138fde0
TM		 2257 struct rpc_message msg = {
2258 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2259 .rpc_argp = o_arg,
2260 .rpc_resp = o_res,
2261 .rpc_cred = data->owner->so_cred,
2262 };
c970aa85
TM		 2263 struct rpc_task_setup task_setup_data = {
2264 .rpc_client = server->client,
5138fde0 2265 .rpc_message = &msg,
c970aa85
TM		 2266 .callback_ops = &nfs4_open_ops,
2267 .callback_data = data,
101070ca 2268 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2269 .flags = RPC_TASK_ASYNC,
2270 };
24ac23ab
TM		 2271 int status;
2272
a9c92d6b 2273 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 2274 kref_get(&data->kref);
3e309914
TM		 2275 data->rpc_done = 0;
2276 data->rpc_status = 0;
2ced46c2 2277 data->cancelled = 0;
bdeca1b7
TM		 2278 data->is_recover = 0;
2279 if (isrecover) {
8fe72bac 2280 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 2281 data->is_recover = 1;
2282 }
c970aa85 2283 task = rpc_run_task(&task_setup_data);
b257957e
AB		 2284 if (IS_ERR(task))
2285 return PTR_ERR(task);
2286 status = nfs4_wait_for_completion_rpc_task(task);
2287 if (status != 0) {
2288 data->cancelled = 1;
2289 smp_wmb();
2290 } else
2291 status = data->rpc_status;
2292 rpc_put_task(task);
2293
2294 return status;
2295}
2296
2297static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2298{
2b0143b5 2299 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2300 struct nfs_openres *o_res = &data->o_res;
2301 int status;
2302
2303 status = nfs4_run_open_task(data, 1);
2304 if (status != 0 || !data->rpc_done)
2305 return status;
2306
6926afd1
TM		 2307 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2308
b257957e
AB		 2309 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2310 status = _nfs4_proc_open_confirm(data);
2311 if (status != 0)
2312 return status;
2313 }
2314
2315 return status;
2316}
2317
f3792d63
TM		 2318/*
2319 * Additional permission checks in order to distinguish between an
2320 * open for read, and an open for execute. This works around the
2321 * fact that NFSv4 OPEN treats read and execute permissions as being
2322 * the same.
2323 * Note that in the non-execute case, we want to turn off permission
2324 * checking if we just created a new file (POSIX open() semantics).
2325 */
6168f62c
WAA		 2326static int nfs4_opendata_access(struct rpc_cred *cred,
2327 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2328 struct nfs4_state *state, fmode_t fmode,
2329 int openflags)
6168f62c
WAA		 2330{
2331 struct nfs_access_entry cache;
2332 u32 mask;
2333
2334 /* access call failed or for some reason the server doesn't
2335 * support any access modes -- defer access call until later */
2336 if (opendata->o_res.access_supported == 0)
2337 return 0;
2338
2339 mask = 0;
f3792d63
TM		 2340 /*
2341 * Use openflags to check for exec, because fmode won't
2342 * always have FMODE_EXEC set when file open for exec.
2343 */
f8d9a897
WAA		 2344 if (openflags & __FMODE_EXEC) {
2345 /* ONLY check for exec rights */
2346 mask = MAY_EXEC;
f3792d63 2347 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2348 mask = MAY_READ;
6168f62c
WAA		 2349
2350 cache.cred = cred;
2351 cache.jiffies = jiffies;
2352 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2353 nfs_access_add_cache(state->inode, &cache);
2354
bbd3a8ee 2355 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2356 return 0;
2357
2358 /* even though OPEN succeeded, access is denied. Close the file */
2359 nfs4_close_state(state, fmode);
998f40b5 2360 return -EACCES;
6168f62c
WAA		 2361}
2362
b257957e
AB		 2363/*
2364 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2365 */
2366static int _nfs4_proc_open(struct nfs4_opendata *data)
2367{
2b0143b5 2368 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2369 struct nfs_server *server = NFS_SERVER(dir);
2370 struct nfs_openargs *o_arg = &data->o_arg;
2371 struct nfs_openres *o_res = &data->o_res;
2372 int status;
2373
2374 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2375 if (!data->rpc_done)
2376 return status;
2377 if (status != 0) {
2378 if (status == -NFS4ERR_BADNAME &&
2379 !(o_arg->open_flags & O_CREAT))
2380 return -ENOENT;
24ac23ab 2381 return status;
08ef7bd3 2382 }
24ac23ab 2383
6926afd1
TM		 2384 nfs_fattr_map_and_free_names(server, &data->f_attr);
2385
5bc2afc2 2386 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2387 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2388 if (o_arg->open_flags & O_EXCL)
2389 data->file_created = 1;
2390 else if (o_res->cinfo.before != o_res->cinfo.after)
2391 data->file_created = 1;
2392 }
0df5dd4a
TM		 2393 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2394 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2395 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2396 status = _nfs4_proc_open_confirm(data);
1da177e4 2397 if (status != 0)
24ac23ab 2398 return status;
1da177e4
LT		 2399 }
2400 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2401 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2402 return 0;
1da177e4
LT		 2403}
2404
d83217c1
AA		 2405static int nfs4_recover_expired_lease(struct nfs_server *server)
2406{
2407 return nfs4_client_recover_expired_lease(server->nfs_client);
2408}
2409
1da177e4
LT		 2410/*
2411 * OPEN_EXPIRED:
2412 * reclaim state on the server after a network partition.
2413 * Assumes caller holds the appropriate lock
2414 */
539cd03a 2415static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2416{
e56e0b78 2417 struct nfs4_opendata *opendata;
864472e9 2418 int ret;
1da177e4 2419
4a1c0893 2420 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2421 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2422 if (IS_ERR(opendata))
2423 return PTR_ERR(opendata);
864472e9 2424 ret = nfs4_open_recover(opendata, state);
35d05778 2425 if (ret == -ESTALE)
3d4ff43d 2426 d_drop(ctx->dentry);
c6d00e63 2427 nfs4_opendata_put(opendata);
864472e9 2428 return ret;
1da177e4
LT		 2429}
2430
a9ed2e25 2431static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2432{
539cd03a 2433 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2434 struct nfs4_exception exception = { };
2435 int err;
2436
2437 do {
539cd03a 2438 err = _nfs4_open_expired(ctx, state);
42113a75 2439 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2440 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2441 continue;
a9ed2e25
TM		 2442 switch (err) {
2443 default:
2444 goto out;
2445 case -NFS4ERR_GRACE:
2446 case -NFS4ERR_DELAY:
2447 nfs4_handle_exception(server, err, &exception);
2448 err = 0;
2449 }
202b50dc 2450 } while (exception.retry);
a9ed2e25 2451out:
202b50dc
TM		 2452 return err;
2453}
2454
1da177e4
LT		 2455static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2456{
1da177e4 2457 struct nfs_open_context *ctx;
864472e9 2458 int ret;
1da177e4 2459
864472e9
TM		 2460 ctx = nfs4_state_find_open_context(state);
2461 if (IS_ERR(ctx))
91876b13 2462 return -EAGAIN;
539cd03a 2463 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2464 put_nfs_open_context(ctx);
2465 return ret;
1da177e4
LT		 2466}
2467
41020b67
TM		 2468static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
2469 const nfs4_stateid *stateid)
4dfd4f7a 2470{
41020b67 2471 nfs_remove_bad_delegation(state->inode, stateid);
4dfd4f7a
TM		 2472 write_seqlock(&state->seqlock);
2473 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2474 write_sequnlock(&state->seqlock);
2475 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2476}
2477
2478static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2479{
2480 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
41020b67 2481 nfs_finish_clear_delegation_stateid(state, NULL);
4dfd4f7a
TM		 2482}
2483
2484static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2485{
2486 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2487 nfs40_clear_delegation_stateid(state);
2488 return nfs4_open_expired(sp, state);
2489}
2490
45870d69
TM		 2491static int nfs40_test_and_free_expired_stateid(struct nfs_server *server,
2492 nfs4_stateid *stateid,
2493 struct rpc_cred *cred)
2494{
2495 return -NFS4ERR_BAD_STATEID;
2496}
2497
f062eb6c 2498#if defined(CONFIG_NFS_V4_1)
4586f6e2
TM		 2499static int nfs41_test_and_free_expired_stateid(struct nfs_server *server,
2500 nfs4_stateid *stateid,
2501 struct rpc_cred *cred)
2502{
2503 int status;
2504
f7a62ada
TM		 2505 switch (stateid->type) {
2506 default:
2507 break;
2508 case NFS4_INVALID_STATEID_TYPE:
2509 case NFS4_SPECIAL_STATEID_TYPE:
2510 return -NFS4ERR_BAD_STATEID;
2511 case NFS4_REVOKED_STATEID_TYPE:
2512 goto out_free;
2513 }
4586f6e2 2514
f7a62ada 2515 status = nfs41_test_stateid(server, stateid, cred);
4586f6e2
TM		 2516 switch (status) {
2517 case -NFS4ERR_EXPIRED:
2518 case -NFS4ERR_ADMIN_REVOKED:
2519 case -NFS4ERR_DELEG_REVOKED:
f7a62ada
TM		 2520 break;
2521 default:
4586f6e2
TM		 2522 return status;
2523 }
f7a62ada
TM		 2524out_free:
2525 /* Ack the revoked state to the server */
f0b0bf88 2526 nfs41_free_stateid(server, stateid, cred, true);
f7a62ada 2527 return -NFS4ERR_EXPIRED;
4586f6e2
TM		 2528}
2529
0c116cad 2530static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2531{
f062eb6c 2532 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2533 nfs4_stateid stateid;
ab7cb0df 2534 struct nfs_delegation *delegation;
0c116cad
TM		 2535 struct rpc_cred *cred;
2536 int status;
3e60ffdd 2537
ab7cb0df
TM		 2538 /* Get the delegation credential for use by test/free_stateid */
2539 rcu_read_lock();
2540 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2541 if (delegation == NULL) {
ab7cb0df 2542 rcu_read_unlock();
0c116cad
TM		 2543 return;
2544 }
2545
2546 nfs4_stateid_copy(&stateid, &delegation->stateid);
4c8e5447
TM		 2547 if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags)) {
2548 rcu_read_unlock();
41020b67 2549 nfs_finish_clear_delegation_stateid(state, &stateid);
4c8e5447
TM		 2550 return;
2551 }
0c116cad 2552
63d63cbf
TM		 2553 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED, &delegation->flags)) {
2554 rcu_read_unlock();
2555 return;
2556 }
2557
0c116cad
TM		 2558 cred = get_rpccred(delegation->cred);
2559 rcu_read_unlock();
4586f6e2 2560 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
0c116cad 2561 trace_nfs4_test_delegation_stateid(state, NULL, status);
f7a62ada 2562 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID)
41020b67 2563 nfs_finish_clear_delegation_stateid(state, &stateid);
ab7cb0df 2564
0c116cad 2565 put_rpccred(cred);
3e60ffdd
CL		 2566}
2567
c5896fc8
TM		 2568/**
2569 * nfs41_check_expired_locks - possibly free a lock stateid
2570 *
2571 * @state: NFSv4 state for an inode
2572 *
2573 * Returns NFS_OK if recovery for this stateid is now finished.
2574 * Otherwise a negative NFS4ERR value is returned.
2575 */
2576static int nfs41_check_expired_locks(struct nfs4_state *state)
2577{
2578 int status, ret = NFS_OK;
d75a6a0e 2579 struct nfs4_lock_state *lsp, *prev = NULL;
c5896fc8
TM		 2580 struct nfs_server *server = NFS_SERVER(state->inode);
2581
2582 if (!test_bit(LK_STATE_IN_USE, &state->flags))
2583 goto out;
d75a6a0e
BC		 2584
2585 spin_lock(&state->state_lock);
c5896fc8
TM		 2586 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
2587 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
2588 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
2589
d75a6a0e
BC		 2590 atomic_inc(&lsp->ls_count);
2591 spin_unlock(&state->state_lock);
2592
2593 nfs4_put_lock_state(prev);
2594 prev = lsp;
2595
c5896fc8
TM		 2596 status = nfs41_test_and_free_expired_stateid(server,
2597 &lsp->ls_stateid,
2598 cred);
2599 trace_nfs4_test_lock_stateid(state, lsp, status);
2600 if (status == -NFS4ERR_EXPIRED ||
2601 status == -NFS4ERR_BAD_STATEID) {
2602 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
67dd4830 2603 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE;
c5896fc8
TM		 2604 if (!recover_lost_locks)
2605 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2606 } else if (status != NFS_OK) {
2607 ret = status;
d75a6a0e
BC		 2608 nfs4_put_lock_state(prev);
2609 goto out;
c5896fc8 2610 }
d75a6a0e 2611 spin_lock(&state->state_lock);
c5896fc8 2612 }
d75a6a0e
BC		 2613 }
2614 spin_unlock(&state->state_lock);
2615 nfs4_put_lock_state(prev);
c5896fc8
TM		 2616out:
2617 return ret;
2618}
2619
3e60ffdd
CL		 2620/**
2621 * nfs41_check_open_stateid - possibly free an open stateid
2622 *
2623 * @state: NFSv4 state for an inode
2624 *
2625 * Returns NFS_OK if recovery for this stateid is now finished.
2626 * Otherwise a negative NFS4ERR value is returned.
2627 */
2628static int nfs41_check_open_stateid(struct nfs4_state *state)
2629{
2630 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2631 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2632 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2633 int status;
2634
b134fc4a 2635 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) {
8a64c4ef
TM		 2636 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) {
2637 if (nfs4_have_delegation(state->inode, state->state))
2638 return NFS_OK;
2639 return -NFS4ERR_OPENMODE;
2640 }
3e60ffdd 2641 return -NFS4ERR_BAD_STATEID;
b134fc4a 2642 }
4586f6e2 2643 status = nfs41_test_and_free_expired_stateid(server, stateid, cred);
08cb47fa 2644 trace_nfs4_test_open_stateid(state, NULL, status);
f7a62ada 2645 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) {
3e60ffdd
CL		 2646 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2647 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2648 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2649 clear_bit(NFS_OPEN_STATE, &state->flags);
67dd4830 2650 stateid->type = NFS4_INVALID_STATEID_TYPE;
b01dd1d8 2651 }
8a64c4ef
TM		 2652 if (status != NFS_OK)
2653 return status;
2654 if (nfs_open_stateid_recover_openmode(state))
2655 return -NFS4ERR_OPENMODE;
2656 return NFS_OK;
b01dd1d8
BS		 2657}
2658
2659static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2660{
eb64cf96 2661 int status;
b01dd1d8 2662
0c116cad 2663 nfs41_check_delegation_stateid(state);
c5896fc8
TM		 2664 status = nfs41_check_expired_locks(state);
2665 if (status != NFS_OK)
2666 return status;
3e60ffdd 2667 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2668 if (status != NFS_OK)
2669 status = nfs4_open_expired(sp, state);
2670 return status;
f062eb6c
BS		 2671}
2672#endif
2673
aa53ed54
JL		 2674/*
2675 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2676 * fields corresponding to attributes that were used to store the verifier.
2677 * Make sure we clobber those fields in the later setattr call
2678 */
5334c5bd
KM		 2679static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2680 struct iattr *sattr, struct nfs4_label **label)
aa53ed54 2681{
5334c5bd
KM		 2682 const u32 *attrset = opendata->o_res.attrset;
2683
2684 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
aa53ed54
JL		 2685 !(sattr->ia_valid & ATTR_ATIME_SET))
2686 sattr->ia_valid |= ATTR_ATIME;
2687
5334c5bd 2688 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
aa53ed54
JL		 2689 !(sattr->ia_valid & ATTR_MTIME_SET))
2690 sattr->ia_valid |= ATTR_MTIME;
5334c5bd
KM		 2691
2692 /* Except MODE, it seems harmless of setting twice. */
2693 if ((attrset[1] & FATTR4_WORD1_MODE))
2694 sattr->ia_valid &= ~ATTR_MODE;
2695
2696 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2697 *label = NULL;
aa53ed54
JL		 2698}
2699
c21443c2
TM		 2700static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2701 fmode_t fmode,
2702 int flags,
3efb9722 2703 struct nfs_open_context *ctx)
c21443c2
TM		 2704{
2705 struct nfs4_state_owner *sp = opendata->owner;
2706 struct nfs_server *server = sp->so_server;
275bb307 2707 struct dentry *dentry;
c21443c2
TM		 2708 struct nfs4_state *state;
2709 unsigned int seq;
2710 int ret;
2711
2712 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2713
2714 ret = _nfs4_proc_open(opendata);
dca78001 2715 if (ret != 0)
c21443c2
TM		 2716 goto out;
2717
2718 state = nfs4_opendata_to_nfs4_state(opendata);
2719 ret = PTR_ERR(state);
2720 if (IS_ERR(state))
2721 goto out;
2722 if (server->caps & NFS_CAP_POSIX_LOCK)
2723 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
a8ce377a
JL		 2724 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
2725 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
c21443c2 2726
275bb307 2727 dentry = opendata->dentry;
2b0143b5 2728 if (d_really_is_negative(dentry)) {
668d0cd5 2729 struct dentry *alias;
275bb307 2730 d_drop(dentry);
668d0cd5
AV		 2731 alias = d_exact_alias(dentry, state->inode);
2732 if (!alias)
2733 alias = d_splice_alias(igrab(state->inode), dentry);
2734 /* d_splice_alias() can't fail here - it's a non-directory */
2735 if (alias) {
275bb307 2736 dput(ctx->dentry);
668d0cd5 2737 ctx->dentry = dentry = alias;
275bb307
TM		 2738 }
2739 nfs_set_verifier(dentry,
2b0143b5 2740 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2741 }
2742
c21443c2
TM		 2743 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2744 if (ret != 0)
2745 goto out;
2746
3efb9722 2747 ctx->state = state;
2b0143b5 2748 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2749 nfs_inode_attach_open_context(ctx);
2750 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2751 nfs4_schedule_stateid_recovery(server, state);
2752 }
c21443c2
TM		 2753out:
2754 return ret;
2755}
2756
1da177e4 2757/*
24ac23ab 2758 * Returns a referenced nfs4_state
1da177e4 2759 */
82be417a 2760static int _nfs4_do_open(struct inode *dir,
4197a055 2761 struct nfs_open_context *ctx,
82be417a
AA		 2762 int flags,
2763 struct iattr *sattr,
5bc2afc2
TM		 2764 struct nfs4_label *label,
2765 int *opened)
1da177e4
LT		 2766{
2767 struct nfs4_state_owner *sp;
2768 struct nfs4_state *state = NULL;
2769 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2770 struct nfs4_opendata *opendata;
4197a055
TM		 2771 struct dentry *dentry = ctx->dentry;
2772 struct rpc_cred *cred = ctx->cred;
2773 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2774 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2775 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2776 struct nfs4_label *olabel = NULL;
aac00a8d 2777 int status;
1da177e4
LT		 2778
2779 /* Protect against reboot recovery conflicts */
1da177e4 2780 status = -ENOMEM;
d1e284d5
TM		 2781 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2782 if (sp == NULL) {
1da177e4
LT		 2783 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2784 goto out_err;
2785 }
58d9714a
TM		 2786 status = nfs4_recover_expired_lease(server);
2787 if (status != 0)
b4454fe1 2788 goto err_put_state_owner;
2b0143b5
DH		 2789 if (d_really_is_positive(dentry))
2790 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2791 status = -ENOMEM;
2b0143b5 2792 if (d_really_is_positive(dentry))
49f9a0fa 2793 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2794 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2795 label, claim, GFP_KERNEL);
e56e0b78 2796 if (opendata == NULL)
95d35cb4 2797 goto err_put_state_owner;
1da177e4 2798
14c43f76
DQ		 2799 if (label) {
2800 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2801 if (IS_ERR(olabel)) {
2802 status = PTR_ERR(olabel);
2803 goto err_opendata_put;
2804 }
2805 }
2806
e911b815
TM		 2807 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2808 if (!opendata->f_attr.mdsthreshold) {
2809 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2810 if (!opendata->f_attr.mdsthreshold)
2811 goto err_free_label;
2812 }
1549210f 2813 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2814 }
2b0143b5
DH		 2815 if (d_really_is_positive(dentry))
2816 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2817
3efb9722 2818 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2819 if (status != 0)
14c43f76 2820 goto err_free_label;
3efb9722 2821 state = ctx->state;
6168f62c 2822
efcbc04e 2823 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 2824 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
5334c5bd 2825 nfs4_exclusive_attrset(opendata, sattr, &label);
a1d1c4f1
TM		 2826 /*
2827 * send create attributes which was not set by open
2828 * with an extra setattr.
2829 */
2830 if (sattr->ia_valid & NFS4_VALID_ATTRS) {
2831 nfs_fattr_init(opendata->o_res.f_attr);
2832 status = nfs4_do_setattr(state->inode, cred,
2833 opendata->o_res.f_attr, sattr,
29b59f94 2834 ctx, label, olabel);
a1d1c4f1
TM		 2835 if (status == 0) {
2836 nfs_setattr_update_inode(state->inode, sattr,
2837 opendata->o_res.f_attr);
2838 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2839 }
1775fd3e 2840 }
0ab64e0e 2841 }
c5c3fb5f 2842 if (opened && opendata->file_created)
5bc2afc2 2843 *opened |= FILE_CREATED;
82be417a 2844
e911b815 2845 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2846 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2847 opendata->f_attr.mdsthreshold = NULL;
2848 }
82be417a 2849
14c43f76
DQ		 2850 nfs4_label_free(olabel);
2851
c6d00e63 2852 nfs4_opendata_put(opendata);
1da177e4 2853 nfs4_put_state_owner(sp);
1da177e4 2854 return 0;
14c43f76
DQ		 2855err_free_label:
2856 nfs4_label_free(olabel);
c6d00e63
TM		 2857err_opendata_put:
2858 nfs4_opendata_put(opendata);
e56e0b78
TM		 2859err_put_state_owner:
2860 nfs4_put_state_owner(sp);
1da177e4 2861out_err:
1da177e4
LT		 2862 return status;
2863}
2864
2865
82be417a 2866static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2867 struct nfs_open_context *ctx,
82be417a
AA		 2868 int flags,
2869 struct iattr *sattr,
5bc2afc2
TM		 2870 struct nfs4_label *label,
2871 int *opened)
1da177e4 2872{
49f9a0fa 2873 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2874 struct nfs4_exception exception = { };
2875 struct nfs4_state *res;
2876 int status;
2877
2878 do {
5bc2afc2 2879 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2880 res = ctx->state;
42113a75 2881 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2882 if (status == 0)
2883 break;
2884 /* NOTE: BAD_SEQID means the server and client disagree about the
2885 * book-keeping w.r.t. state-changing operations
2886 * (OPEN/CLOSE/LOCK/LOCKU...)
2887 * It is actually a sign of a bug on the client or on the server.
2888 *
2889 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2890 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2891 * have unhashed the old state_owner for us, and that we can
2892 * therefore safely retry using a new one. We should still warn
2893 * the user though...
2894 */
2895 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2896 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2897 " returned a bad sequence-id error!\n",
2898 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2899 exception.retry = 1;
2900 continue;
2901 }
550f5747
TM		 2902 /*
2903 * BAD_STATEID on OPEN means that the server cancelled our
2904 * state before it received the OPEN_CONFIRM.
2905 * Recover by retrying the request as per the discussion
2906 * on Page 181 of RFC3530.
2907 */
2908 if (status == -NFS4ERR_BAD_STATEID) {
2909 exception.retry = 1;
2910 continue;
2911 }
aac00a8d
TM		 2912 if (status == -EAGAIN) {
2913 /* We must have found a delegation */
2914 exception.retry = 1;
2915 continue;
2916 }
49f9a0fa
TM		 2917 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2918 continue;
2919 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2920 status, &exception));
2921 } while (exception.retry);
2922 return res;
2923}
2924
8487c479
TM		 2925static int _nfs4_do_setattr(struct inode *inode,
2926 struct nfs_setattrargs *arg,
2927 struct nfs_setattrres *res,
2928 struct rpc_cred *cred,
29b59f94 2929 struct nfs_open_context *ctx)
1da177e4 2930{
3e4f6290 2931 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2932 struct rpc_message msg = {
659bfcd6 2933 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
8487c479
TM		 2934 .rpc_argp = arg,
2935 .rpc_resp = res,
659bfcd6 2936 .rpc_cred = cred,
1da177e4 2937 };
abf4e13c 2938 struct rpc_cred *delegation_cred = NULL;
26e976a8 2939 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2940 fmode_t fmode;
2941 bool truncate;
65e4308d 2942 int status;
1da177e4 2943
8487c479 2944 nfs_fattr_init(res->fattr);
1da177e4 2945
ee3ae84e 2946 /* Servers should only apply open mode checks for file size changes */
8487c479 2947 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
ee3ae84e
TM		 2948 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2949
8487c479 2950 if (nfs4_copy_delegation_stateid(inode, fmode, &arg->stateid, &delegation_cred)) {
ee3ae84e 2951 /* Use that stateid */
29b59f94 2952 } else if (truncate && ctx != NULL) {
17393475 2953 struct nfs_lock_context *l_ctx;
29b59f94 2954 if (!nfs4_valid_open_stateid(ctx->state))
0418dae1 2955 return -EBADF;
17393475
N		 2956 l_ctx = nfs_get_lock_context(ctx);
2957 if (IS_ERR(l_ctx))
2958 return PTR_ERR(l_ctx);
7a0566b3
N		 2959 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx,
2960 &arg->stateid, &delegation_cred);
2961 nfs_put_lock_context(l_ctx);
2962 if (status == -EIO)
0418dae1 2963 return -EBADF;
08e9eac4 2964 } else
8487c479 2965 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
abf4e13c
TM		 2966 if (delegation_cred)
2967 msg.rpc_cred = delegation_cred;
1da177e4 2968
8487c479 2969 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
abf4e13c
TM		 2970
2971 put_rpccred(delegation_cred);
29b59f94 2972 if (status == 0 && ctx != NULL)
26e976a8 2973 renew_lease(server, timestamp);
8487c479 2974 trace_nfs4_setattr(inode, &arg->stateid, status);
65e4308d 2975 return status;
1da177e4
LT		 2976}
2977
659bfcd6
TM		 2978static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2979 struct nfs_fattr *fattr, struct iattr *sattr,
29b59f94 2980 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
1775fd3e 2981 struct nfs4_label *olabel)
1da177e4 2982{
3e4f6290 2983 struct nfs_server *server = NFS_SERVER(inode);
29b59f94 2984 struct nfs4_state *state = ctx ? ctx->state : NULL;
8487c479
TM		 2985 struct nfs_setattrargs arg = {
2986 .fh = NFS_FH(inode),
2987 .iap = sattr,
2988 .server = server,
2989 .bitmask = server->attr_bitmask,
2990 .label = ilabel,
2991 };
2992 struct nfs_setattrres res = {
2993 .fattr = fattr,
2994 .label = olabel,
2995 .server = server,
2996 };
a1d0b5ee
TM		 2997 struct nfs4_exception exception = {
2998 .state = state,
3114ea7a 2999 .inode = inode,
8487c479 3000 .stateid = &arg.stateid,
a1d0b5ee 3001 };
1da177e4 3002 int err;
8487c479
TM		 3003
3004 arg.bitmask = nfs4_bitmask(server, ilabel);
3005 if (ilabel)
3006 arg.bitmask = nfs4_bitmask(server, olabel);
3007
1da177e4 3008 do {
29b59f94 3009 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx);
451146be
TM		 3010 switch (err) {
3011 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 3012 if (!(sattr->ia_valid & ATTR_SIZE)) {
3013 pr_warn_once("NFSv4: server %s is incorrectly "
3014 "applying open mode checks to "
3015 "a SETATTR that is not "
3016 "changing file size.\n",
3017 server->nfs_client->cl_hostname);
3018 }
451146be
TM		 3019 if (state && !(state->state & FMODE_WRITE)) {
3020 err = -EBADF;
3021 if (sattr->ia_valid & ATTR_OPEN)
3022 err = -EACCES;
3023 goto out;
3024 }
3025 }
3026 err = nfs4_handle_exception(server, err, &exception);
1da177e4 3027 } while (exception.retry);
451146be 3028out:
1da177e4
LT		 3029 return err;
3030}
3031
500d701f
PT		 3032static bool
3033nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
3034{
3035 if (inode == NULL || !nfs_have_layout(inode))
3036 return false;
3037
3038 return pnfs_wait_on_layoutreturn(inode, task);
3039}
3040
1da177e4
LT		 3041struct nfs4_closedata {
3042 struct inode *inode;
3043 struct nfs4_state *state;
3044 struct nfs_closeargs arg;
3045 struct nfs_closeres res;
cf805165
TM		 3046 struct {
3047 struct nfs4_layoutreturn_args arg;
3048 struct nfs4_layoutreturn_res res;
4d796d75 3049 struct nfs4_xdr_opaque_data ld_private;
cf805165
TM		 3050 u32 roc_barrier;
3051 bool roc;
3052 } lr;
516a6af6 3053 struct nfs_fattr fattr;
26e976a8 3054 unsigned long timestamp;
1da177e4
LT		 3055};
3056
963d8fe5 3057static void nfs4_free_closedata(void *data)
9512135d 3058{
963d8fe5
TM		 3059 struct nfs4_closedata *calldata = data;
3060 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 3061 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 3062
cf805165 3063 if (calldata->lr.roc)
1c5bd76d
TM		 3064 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res,
3065 calldata->res.lr_ret);
9512135d
TM		 3066 nfs4_put_open_state(calldata->state);
3067 nfs_free_seqid(calldata->arg.seqid);
9512135d 3068 nfs4_put_state_owner(sp);
322b2b90 3069 nfs_sb_deactive(sb);
9512135d
TM		 3070 kfree(calldata);
3071}
3072
963d8fe5 3073static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 3074{
963d8fe5 3075 struct nfs4_closedata *calldata = data;
1da177e4 3076 struct nfs4_state *state = calldata->state;
1da177e4 3077 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 3078 nfs4_stateid *res_stateid = NULL;
1da177e4 3079
a3ca5651 3080 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 3081 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3082 return;
42113a75 3083 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
cf805165
TM		 3084
3085 /* Handle Layoutreturn errors */
3086 if (calldata->arg.lr_args && task->tk_status != 0) {
3087 switch (calldata->res.lr_ret) {
3088 default:
3089 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
3090 break;
3091 case 0:
3092 calldata->arg.lr_args = NULL;
3093 calldata->res.lr_res = NULL;
3094 break;
3095 case -NFS4ERR_ADMIN_REVOKED:
3096 case -NFS4ERR_DELEG_REVOKED:
3097 case -NFS4ERR_EXPIRED:
3098 case -NFS4ERR_BAD_STATEID:
3099 case -NFS4ERR_OLD_STATEID:
3100 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
3101 case -NFS4ERR_WRONG_CRED:
3102 calldata->arg.lr_args = NULL;
3103 calldata->res.lr_res = NULL;
3104 calldata->res.lr_ret = 0;
3105 rpc_restart_call_prepare(task);
3106 return;
3107 }
3108 }
3109
1da177e4
LT		 3110 /* hmm. we are done with the inode, and in the process of freeing
3111 * the state_owner. we keep this around to process errors
3112 */
1da177e4
LT		 3113 switch (task->tk_status) {
3114 case 0:
412f6c4c 3115 res_stateid = &calldata->res.stateid;
26e976a8 3116 renew_lease(server, calldata->timestamp);
412f6c4c 3117 break;
69794ad7 3118 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 3119 case -NFS4ERR_STALE_STATEID:
26d36301
TM		 3120 case -NFS4ERR_EXPIRED:
3121 nfs4_free_revoked_stateid(server,
3122 &calldata->arg.stateid,
3123 task->tk_msg.rpc_cred);
9e33bed5
TM		 3124 case -NFS4ERR_OLD_STATEID:
3125 case -NFS4ERR_BAD_STATEID:
566fcec6 3126 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 3127 &state->open_stateid)) {
566fcec6
TM		 3128 rpc_restart_call_prepare(task);
3129 goto out_release;
3130 }
dc0b027d 3131 if (calldata->arg.fmode == 0)
9e33bed5 3132 break;
1da177e4 3133 default:
8478eaa1 3134 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 3135 rpc_restart_call_prepare(task);
69794ad7
TM		 3136 goto out_release;
3137 }
1da177e4 3138 }
4a1e2feb
TM		 3139 nfs_clear_open_stateid(state, &calldata->arg.stateid,
3140 res_stateid, calldata->arg.fmode);
69794ad7 3141out_release:
72211dbe 3142 nfs_release_seqid(calldata->arg.seqid);
516a6af6 3143 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 3144 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 3145}
3146
4ce70ada 3147static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 3148{
4ce70ada 3149 struct nfs4_closedata *calldata = data;
9512135d 3150 struct nfs4_state *state = calldata->state;
7fdab069 3151 struct inode *inode = calldata->inode;
aee7af35 3152 bool is_rdonly, is_wronly, is_rdwr;
88069f77 3153 int call_close = 0;
9512135d 3154
a3ca5651 3155 dprintk("%s: begin!\n", __func__);
963d8fe5 3156 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 3157 goto out_wait;
003707c7 3158
88069f77 3159 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 3160 spin_lock(&state->owner->so_lock);
aee7af35
TM		 3161 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
3162 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
3163 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 3164 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 3165 /* Calculate the change in open mode */
cd9288ff 3166 calldata->arg.fmode = 0;
e7616923 3167 if (state->n_rdwr == 0) {
cd9288ff
TM		 3168 if (state->n_rdonly == 0)
3169 call_close |= is_rdonly;
3170 else if (is_rdonly)
3171 calldata->arg.fmode |= FMODE_READ;
3172 if (state->n_wronly == 0)
3173 call_close |= is_wronly;
3174 else if (is_wronly)
3175 calldata->arg.fmode |= FMODE_WRITE;
e547f262
TM		 3176 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
3177 call_close |= is_rdwr;
cd9288ff
TM		 3178 } else if (is_rdwr)
3179 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
3180
5cc7861e
TM		 3181 if (!nfs4_valid_open_stateid(state) ||
3182 test_bit(NFS_OPEN_STATE, &state->flags) == 0)
5d422301 3183 call_close = 0;
4cecb76f 3184 spin_unlock(&state->owner->so_lock);
88069f77
TM		 3185
3186 if (!call_close) {
963d8fe5 3187 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 3188 goto out_no_action;
9512135d 3189 }
88069f77 3190
1c5bd76d 3191 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) {
500d701f
PT		 3192 nfs_release_seqid(calldata->arg.seqid);
3193 goto out_wait;
3194 }
3195
3ecefc92 3196 if (calldata->arg.fmode == 0) {
88069f77 3197 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3ecefc92
TM		 3198
3199 /* Close-to-open cache consistency revalidation */
3200 if (!nfs4_have_delegation(inode, FMODE_READ))
3201 calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask;
3202 else
3203 calldata->arg.bitmask = NULL;
3204 }
3c13cb5b 3205
6ae37339
TM		 3206 calldata->arg.share_access =
3207 nfs4_map_atomic_open_share(NFS_SERVER(inode),
3208 calldata->arg.fmode, 0);
88069f77 3209
516a6af6 3210 nfs_fattr_init(calldata->res.fattr);
26e976a8 3211 calldata->timestamp = jiffies;
7fdab069 3212 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 3213 &calldata->arg.seq_args,
3214 &calldata->res.seq_res,
2240a9e2
TM		 3215 task) != 0)
3216 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 3217 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 3218 return;
3219out_no_action:
3220 task->tk_action = NULL;
3221out_wait:
3222 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 3223}
3224
963d8fe5 3225static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 3226 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 3227 .rpc_call_done = nfs4_close_done,
3228 .rpc_release = nfs4_free_closedata,
3229};
3230
1da177e4
LT		 3231/*
3232 * It is possible for data to be read/written from a mem-mapped file
3233 * after the sys_close call (which hits the vfs layer as a flush).
3234 * This means that we can't safely call nfsv4 close on a file until
3235 * the inode is cleared. This in turn means that we are not good
3236 * NFSv4 citizens - we do not indicate to the server to update the file's
3237 * share state even when we are done with one of the three share
3238 * stateid's in the inode.
3239 *
3240 * NOTE: Caller must be holding the sp->so_owner semaphore!
3241 */
1f7977c1 3242int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 3243{
4a35bd41 3244 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 3245 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 3246 struct nfs4_closedata *calldata;
b39e625b
TM		 3247 struct nfs4_state_owner *sp = state->owner;
3248 struct rpc_task *task;
5138fde0
TM		 3249 struct rpc_message msg = {
3250 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3251 .rpc_cred = state->owner->so_cred,
3252 };
c970aa85
TM		 3253 struct rpc_task_setup task_setup_data = {
3254 .rpc_client = server->client,
5138fde0 3255 .rpc_message = &msg,
c970aa85 3256 .callback_ops = &nfs4_close_ops,
101070ca 3257 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3258 .flags = RPC_TASK_ASYNC,
3259 };
9512135d 3260 int status = -ENOMEM;
1da177e4 3261
fa940720
WAA		 3262 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3263 &task_setup_data.rpc_client, &msg);
3264
8535b2be 3265 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 3266 if (calldata == NULL)
9512135d 3267 goto out;
a9c92d6b 3268 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 3269 calldata->inode = state->inode;
1da177e4 3270 calldata->state = state;
4a35bd41 3271 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 3272 /* Serialization for the sequence id */
63f5f796
TM		 3273 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3274 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 3275 if (IS_ERR(calldata->arg.seqid))
9512135d 3276 goto out_free_calldata;
dc0b027d 3277 calldata->arg.fmode = 0;
4d796d75 3278 calldata->lr.arg.ld_private = &calldata->lr.ld_private;
516a6af6 3279 calldata->res.fattr = &calldata->fattr;
c1d51931 3280 calldata->res.seqid = calldata->arg.seqid;
516a6af6 3281 calldata->res.server = server;
cf805165 3282 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
1c5bd76d
TM		 3283 calldata->lr.roc = pnfs_roc(state->inode,
3284 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred);
3285 if (calldata->lr.roc) {
3286 calldata->arg.lr_args = &calldata->lr.arg;
3287 calldata->res.lr_res = &calldata->lr.res;
3288 }
643168c2 3289 nfs_sb_active(calldata->inode->i_sb);
9512135d 3290
1174dd1f
TM		 3291 msg.rpc_argp = &calldata->arg;
3292 msg.rpc_resp = &calldata->res;
c970aa85
TM		 3293 task_setup_data.callback_data = calldata;
3294 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 3295 if (IS_ERR(task))
3296 return PTR_ERR(task);
a49c3c77
TM		 3297 status = 0;
3298 if (wait)
3299 status = rpc_wait_for_completion_task(task);
b39e625b 3300 rpc_put_task(task);
a49c3c77 3301 return status;
9512135d
TM		 3302out_free_calldata:
3303 kfree(calldata);
3304out:
b39e625b
TM		 3305 nfs4_put_open_state(state);
3306 nfs4_put_state_owner(sp);
9512135d 3307 return status;
1da177e4
LT		 3308}
3309
2b484297 3310static struct inode *
5bc2afc2
TM		 3311nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3312 int open_flags, struct iattr *attr, int *opened)
1da177e4 3313{
1da177e4 3314 struct nfs4_state *state;
aa9c2669
DQ		 3315 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3316
3317 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 3318
565277f6 3319 /* Protect against concurrent sillydeletes */
5bc2afc2 3320 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 3321
3322 nfs4_label_release_security(label);
3323
f46e0bd3
TM		 3324 if (IS_ERR(state))
3325 return ERR_CAST(state);
275bb307 3326 return state->inode;
1da177e4
LT		 3327}
3328
1185a552 3329static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 3330{
3331 if (ctx->state == NULL)
3332 return;
3333 if (is_sync)
643168c2 3334 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 3335 else
643168c2 3336 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 3337}
1da177e4 3338
b944dba3
TM		 3339#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3340#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
dff25ddb 3341#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_MODE_UMASK - 1UL)
b944dba3 3342
1da177e4
LT		 3343static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3344{
8c61282f 3345 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 3346 struct nfs4_server_caps_arg args = {
3347 .fhandle = fhandle,
8c61282f 3348 .bitmask = bitmask,
43652ad5 3349 };
1da177e4
LT		 3350 struct nfs4_server_caps_res res = {};
3351 struct rpc_message msg = {
3352 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 3353 .rpc_argp = &args,
1da177e4
LT		 3354 .rpc_resp = &res,
3355 };
3356 int status;
3357
8c61282f
KM		 3358 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3359 FATTR4_WORD0_FH_EXPIRE_TYPE |
3360 FATTR4_WORD0_LINK_SUPPORT |
3361 FATTR4_WORD0_SYMLINK_SUPPORT |
3362 FATTR4_WORD0_ACLSUPPORT;
3363 if (minorversion)
3364 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3365
7c513058 3366 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3367 if (status == 0) {
b944dba3 3368 /* Sanity check the server answers */
8c61282f 3369 switch (minorversion) {
b944dba3
TM		 3370 case 0:
3371 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3372 res.attr_bitmask[2] = 0;
3373 break;
3374 case 1:
3375 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3376 break;
3377 case 2:
3378 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3379 }
1da177e4 3380 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 3381 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3382 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3383 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3384 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 3385 NFS_CAP_CTIME|NFS_CAP_MTIME|
3386 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 3387 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3388 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 3389 server->caps |= NFS_CAP_ACLS;
3390 if (res.has_links != 0)
3391 server->caps |= NFS_CAP_HARDLINKS;
3392 if (res.has_symlinks != 0)
3393 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 3394 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3395 server->caps |= NFS_CAP_FILEID;
3396 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3397 server->caps |= NFS_CAP_MODE;
3398 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3399 server->caps |= NFS_CAP_NLINK;
3400 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3401 server->caps |= NFS_CAP_OWNER;
3402 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3403 server->caps |= NFS_CAP_OWNER_GROUP;
3404 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3405 server->caps |= NFS_CAP_ATIME;
3406 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3407 server->caps |= NFS_CAP_CTIME;
3408 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3409 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 3410#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3411 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3412 server->caps |= NFS_CAP_SECURITY_LABEL;
3413#endif
3414 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3415 sizeof(server->attr_bitmask));
b944dba3 3416 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 3417
a65318bf
TM		 3418 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3419 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3420 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 3421 server->cache_consistency_bitmask[2] = 0;
8c61282f
KM		 3422 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3423 sizeof(server->exclcreat_bitmask));
1da177e4 3424 server->acl_bitmask = res.acl_bitmask;
264e6351 3425 server->fh_expire_type = res.fh_expire_type;
1da177e4 3426 }
cccef3b9 3427
1da177e4
LT		 3428 return status;
3429}
3430
55a97593 3431int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 3432{
3433 struct nfs4_exception exception = { };
3434 int err;
3435 do {
3436 err = nfs4_handle_exception(server,
3437 _nfs4_server_capabilities(server, fhandle),
3438 &exception);
3439 } while (exception.retry);
3440 return err;
3441}
3442
3443static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3444 struct nfs_fsinfo *info)
3445{
aa9c2669 3446 u32 bitmask[3];
1da177e4 3447 struct nfs4_lookup_root_arg args = {
aa9c2669 3448 .bitmask = bitmask,
1da177e4
LT		 3449 };
3450 struct nfs4_lookup_res res = {
3451 .server = server,
0e574af1 3452 .fattr = info->fattr,
1da177e4
LT		 3453 .fh = fhandle,
3454 };
3455 struct rpc_message msg = {
3456 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3457 .rpc_argp = &args,
3458 .rpc_resp = &res,
3459 };
008f55d0 3460
aa9c2669
DQ		 3461 bitmask[0] = nfs4_fattr_bitmap[0];
3462 bitmask[1] = nfs4_fattr_bitmap[1];
3463 /*
3464 * Process the label in the upcoming getfattr
3465 */
3466 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3467
0e574af1 3468 nfs_fattr_init(info->fattr);
7c513058 3469 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3470}
3471
3472static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3473 struct nfs_fsinfo *info)
3474{
3475 struct nfs4_exception exception = { };
3476 int err;
3477 do {
fb8a5ba8 3478 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3479 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3480 switch (err) {
3481 case 0:
3482 case -NFS4ERR_WRONGSEC:
05e9cfb4 3483 goto out;
fb8a5ba8
BS		 3484 default:
3485 err = nfs4_handle_exception(server, err, &exception);
3486 }
1da177e4 3487 } while (exception.retry);
05e9cfb4 3488out:
1da177e4
LT		 3489 return err;
3490}
3491
8f70e95f
BS		 3492static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3493 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3494{
c2190661
TM		 3495 struct rpc_auth_create_args auth_args = {
3496 .pseudoflavor = flavor,
3497 };
8f70e95f
BS		 3498 struct rpc_auth *auth;
3499 int ret;
3500
c2190661 3501 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3502 if (IS_ERR(auth)) {
75bc8821 3503 ret = -EACCES;
8f70e95f
BS		 3504 goto out;
3505 }
3506 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3507out:
3508 return ret;
3509}
3510
9a744ba3
CL		 3511/*
3512 * Retry pseudoroot lookup with various security flavors. We do this when:
3513 *
3514 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3515 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3516 *
3517 * Returns zero on success, or a negative NFS4ERR value, or a
3518 * negative errno value.
3519 */
801a16dc 3520static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3521 struct nfs_fsinfo *info)
1da177e4 3522{
9a744ba3
CL		 3523 /* Per 3530bis 15.33.5 */
3524 static const rpc_authflavor_t flav_array[] = {
3525 RPC_AUTH_GSS_KRB5P,
3526 RPC_AUTH_GSS_KRB5I,
3527 RPC_AUTH_GSS_KRB5,
c4eafe11 3528 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3529 RPC_AUTH_NULL,
3530 };
3531 int status = -EPERM;
3532 size_t i;
6a1a1e34 3533
4d4b69dd
WAA		 3534 if (server->auth_info.flavor_len > 0) {
3535 /* try each flavor specified by user */
3536 for (i = 0; i < server->auth_info.flavor_len; i++) {
3537 status = nfs4_lookup_root_sec(server, fhandle, info,
3538 server->auth_info.flavors[i]);
3539 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3540 continue;
3541 break;
3542 }
3543 } else {
3544 /* no flavors specified by user, try default list */
3545 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3546 status = nfs4_lookup_root_sec(server, fhandle, info,
3547 flav_array[i]);
3548 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3549 continue;
3550 break;
3551 }
8f70e95f 3552 }
9a744ba3 3553
fb8a5ba8
BS		 3554 /*
3555 * -EACCESS could mean that the user doesn't have correct permissions
3556 * to access the mount. It could also mean that we tried to mount
3557 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3558 * existing mount programs don't handle -EACCES very well so it should
3559 * be mapped to -EPERM instead.
3560 */
3561 if (status == -EACCES)
3562 status = -EPERM;
801a16dc
BS		 3563 return status;
3564}
3565
2ed4b95b
CL		 3566/**
3567 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3568 * @server: initialized nfs_server handle
3569 * @fhandle: we fill in the pseudo-fs root file handle
3570 * @info: we fill in an FSINFO struct
5e6b1990 3571 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3572 *
3573 * Returns zero on success, or a negative errno.
801a16dc 3574 */
3028eb2b 3575int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3576 struct nfs_fsinfo *info,
3577 bool auth_probe)
801a16dc 3578{
c7757074 3579 int status = 0;
2ed4b95b 3580
c7757074 3581 if (!auth_probe)
5e6b1990 3582 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3583
3584 if (auth_probe || status == NFS4ERR_WRONGSEC)
698c937b
TM		 3585 status = server->nfs_client->cl_mvops->find_root_sec(server,
3586 fhandle, info);
2ed4b95b 3587
1da177e4
LT		 3588 if (status == 0)
3589 status = nfs4_server_capabilities(server, fhandle);
3590 if (status == 0)
3591 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3592
c12e87f4 3593 return nfs4_map_errors(status);
1da177e4
LT		 3594}
3595
bae36241
BS		 3596static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3597 struct nfs_fsinfo *info)
3598{
3599 int error;
3600 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3601 struct nfs4_label *label = NULL;
bae36241
BS		 3602
3603 error = nfs4_server_capabilities(server, mntfh);
3604 if (error < 0) {
3605 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3606 return error;
3607 }
3608
14c43f76
DQ		 3609 label = nfs4_label_alloc(server, GFP_KERNEL);
3610 if (IS_ERR(label))
3611 return PTR_ERR(label);
3612
1775fd3e 3613 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3614 if (error < 0) {
3615 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3616 goto err_free_label;
bae36241
BS		 3617 }
3618
3619 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3620 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3621 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3622
14c43f76
DQ		 3623err_free_label:
3624 nfs4_label_free(label);
3625
bae36241
BS		 3626 return error;
3627}
3628
6b97fd3d
MN		 3629/*
3630 * Get locations and (maybe) other attributes of a referral.
3631 * Note that we'll actually follow the referral later when
3632 * we detect fsid mismatch in inode revalidation
3633 */
f05d147f
BS		 3634static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3635 const struct qstr *name, struct nfs_fattr *fattr,
3636 struct nfs_fh *fhandle)
6b97fd3d
MN		 3637{
3638 int status = -ENOMEM;
3639 struct page *page = NULL;
3640 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3641
3642 page = alloc_page(GFP_KERNEL);
3643 if (page == NULL)
3644 goto out;
3645 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3646 if (locations == NULL)
3647 goto out;
3648
f05d147f 3649 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3650 if (status != 0)
3651 goto out;
519ae255
CL		 3652
3653 /*
3654 * If the fsid didn't change, this is a migration event, not a
3655 * referral. Cause us to drop into the exception handler, which
3656 * will kick off migration recovery.
3657 */
6b97fd3d 3658 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3659 dprintk("%s: server did not return a different fsid for"
3660 " a referral at %s\n", __func__, name->name);
519ae255 3661 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3662 goto out;
3663 }
533eb461
AA		 3664 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3665 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3666
533eb461 3667 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3668 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3669 memset(fhandle, 0, sizeof(struct nfs_fh));
3670out:
3671 if (page)
3672 __free_page(page);
5d7ca35a 3673 kfree(locations);
6b97fd3d
MN		 3674 return status;
3675}
3676
1775fd3e
DQ		 3677static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3678 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3679{
3680 struct nfs4_getattr_arg args = {
3681 .fh = fhandle,
3682 .bitmask = server->attr_bitmask,
3683 };
3684 struct nfs4_getattr_res res = {
3685 .fattr = fattr,
1775fd3e 3686 .label = label,
1da177e4
LT		 3687 .server = server,
3688 };
3689 struct rpc_message msg = {
3690 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3691 .rpc_argp = &args,
3692 .rpc_resp = &res,
3693 };
aa9c2669
DQ		 3694
3695 args.bitmask = nfs4_bitmask(server, label);
3696
0e574af1 3697 nfs_fattr_init(fattr);
7c513058 3698 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3699}
3700
1775fd3e
DQ		 3701static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3702 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3703{
3704 struct nfs4_exception exception = { };
3705 int err;
3706 do {
b5f875a9
TM		 3707 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3708 trace_nfs4_getattr(server, fhandle, fattr, err);
3709 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3710 &exception);
3711 } while (exception.retry);
3712 return err;
3713}
3714
3715/*
3716 * The file is not closed if it is opened due to the a request to change
3717 * the size of the file. The open call will not be needed once the
3718 * VFS layer lookup-intents are implemented.
3719 *
3720 * Close is called when the inode is destroyed.
3721 * If we haven't opened the file for O_WRONLY, we
3722 * need to in the size_change case to obtain a stateid.
3723 *
3724 * Got race?
3725 * Because OPEN is always done by name in nfsv4, it is
3726 * possible that we opened a different file by the same
3727 * name. We can recognize this race condition, but we
3728 * can't do anything about it besides returning an error.
3729 *
3730 * This will be fixed with VFS changes (lookup-intent).
3731 */
3732static int
3733nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3734 struct iattr *sattr)
3735{
2b0143b5 3736 struct inode *inode = d_inode(dentry);
659bfcd6 3737 struct rpc_cred *cred = NULL;
29b59f94 3738 struct nfs_open_context *ctx = NULL;
14c43f76 3739 struct nfs4_label *label = NULL;
1da177e4
LT		 3740 int status;
3741
88ac815c
PT		 3742 if (pnfs_ld_layoutret_on_setattr(inode) &&
3743 sattr->ia_valid & ATTR_SIZE &&
3744 sattr->ia_size < i_size_read(inode))
24028672 3745 pnfs_commit_and_return_layout(inode);
8a1636c4 3746
0e574af1 3747 nfs_fattr_init(fattr);
1da177e4 3748
2669940d
AA		 3749 /* Deal with open(O_TRUNC) */
3750 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3751 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3752
3753 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3754 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3755 return 0;
3756
d530838b 3757 /* Search for an existing open(O_WRITE) file */
659bfcd6 3758 if (sattr->ia_valid & ATTR_FILE) {
659bfcd6
TM		 3759
3760 ctx = nfs_file_open_context(sattr->ia_file);
29b59f94 3761 if (ctx)
504e5189 3762 cred = ctx->cred;
659bfcd6 3763 }
08e9eac4 3764
14c43f76
DQ		 3765 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3766 if (IS_ERR(label))
3767 return PTR_ERR(label);
3768
29b59f94 3769 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label);
aa9c2669 3770 if (status == 0) {
f044636d 3771 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3772 nfs_setsecurity(inode, fattr, label);
3773 }
14c43f76 3774 nfs4_label_free(label);
1da177e4
LT		 3775 return status;
3776}
3777
0c2e53f1
TM		 3778static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3779 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3780 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3781{
0c2e53f1 3782 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3783 int status;
3784 struct nfs4_lookup_arg args = {
3785 .bitmask = server->attr_bitmask,
0c2e53f1 3786 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3787 .name = name,
3788 };
3789 struct nfs4_lookup_res res = {
3790 .server = server,
3791 .fattr = fattr,
aa9c2669 3792 .label = label,
2b3de441
DH		 3793 .fh = fhandle,
3794 };
3795 struct rpc_message msg = {
3796 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3797 .rpc_argp = &args,
3798 .rpc_resp = &res,
3799 };
3800
aa9c2669
DQ		 3801 args.bitmask = nfs4_bitmask(server, label);
3802
2b3de441
DH		 3803 nfs_fattr_init(fattr);
3804
1da177e4 3805 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3806 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3807 dprintk("NFS reply lookup: %d\n", status);
3808 return status;
3809}
3810
72de53ec 3811static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3812{
7ebb9315 3813 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3814 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3815 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3816 fattr->nlink = 2;
3817}
3818
72de53ec 3819static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
beffb8fe 3820 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3821 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3822{
3823 struct nfs4_exception exception = { };
72de53ec 3824 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3825 int err;
3826 do {
1775fd3e 3827 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3828 trace_nfs4_lookup(dir, name, err);
72de53ec 3829 switch (err) {
08ef7bd3 3830 case -NFS4ERR_BADNAME:
72de53ec
BS		 3831 err = -ENOENT;
3832 goto out;
0c2e53f1 3833 case -NFS4ERR_MOVED:
f05d147f 3834 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3835 if (err == -NFS4ERR_MOVED)
3836 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3837 goto out;
0c2e53f1 3838 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3839 err = -EPERM;
3840 if (client != *clnt)
3841 goto out;
66b06860 3842 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3843 if (IS_ERR(client))
3844 return PTR_ERR(client);
3845
3846 exception.retry = 1;
3847 break;
3848 default:
3849 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3850 }
1da177e4 3851 } while (exception.retry);
72de53ec
BS		 3852
3853out:
3854 if (err == 0)
3855 *clnt = client;
3856 else if (client != *clnt)
3857 rpc_shutdown_client(client);
3858
1da177e4
LT		 3859 return err;
3860}
3861
beffb8fe 3862static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1775fd3e
DQ		 3863 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3864 struct nfs4_label *label)
72de53ec
BS		 3865{
3866 int status;
3867 struct rpc_clnt *client = NFS_CLIENT(dir);
3868
1775fd3e 3869 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3870 if (client != NFS_CLIENT(dir)) {
3871 rpc_shutdown_client(client);
3872 nfs_fixup_secinfo_attributes(fattr);
3873 }
3874 return status;
3875}
3876
f05d147f 3877struct rpc_clnt *
beffb8fe 3878nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name,
f05d147f
BS		 3879 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3880{
b72888cb 3881 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3882 int status;
f05d147f 3883
1775fd3e 3884 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3885 if (status < 0)
f05d147f 3886 return ERR_PTR(status);
b72888cb 3887 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3888}
3889
1da177e4
LT		 3890static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3891{
76b32999 3892 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3893 struct nfs4_accessargs args = {
3894 .fh = NFS_FH(inode),
a4980e78 3895 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3896 };
3897 struct nfs4_accessres res = {
3898 .server = server,
1da177e4 3899 };
1da177e4
LT		 3900 struct rpc_message msg = {
3901 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3902 .rpc_argp = &args,
3903 .rpc_resp = &res,
3904 .rpc_cred = entry->cred,
3905 };
3906 int mode = entry->mask;
aa9c2669 3907 int status = 0;
1da177e4
LT		 3908
3909 /*
3910 * Determine which access bits we want to ask for...
3911 */
3912 if (mode & MAY_READ)
3913 args.access |= NFS4_ACCESS_READ;
3914 if (S_ISDIR(inode->i_mode)) {
3915 if (mode & MAY_WRITE)
3916 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3917 if (mode & MAY_EXEC)
3918 args.access |= NFS4_ACCESS_LOOKUP;
3919 } else {
3920 if (mode & MAY_WRITE)
3921 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3922 if (mode & MAY_EXEC)
3923 args.access |= NFS4_ACCESS_EXECUTE;
3924 }
c407d41a
TM		 3925
3926 res.fattr = nfs_alloc_fattr();
3927 if (res.fattr == NULL)
3928 return -ENOMEM;
3929
7c513058 3930 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3931 if (!status) {
6168f62c 3932 nfs_access_set_mask(entry, res.access);
c407d41a 3933 nfs_refresh_inode(inode, res.fattr);
1da177e4 3934 }
c407d41a 3935 nfs_free_fattr(res.fattr);
1da177e4
LT		 3936 return status;
3937}
3938
3939static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3940{
3941 struct nfs4_exception exception = { };
3942 int err;
3943 do {
c1578b76
TM		 3944 err = _nfs4_proc_access(inode, entry);
3945 trace_nfs4_access(inode, err);
3946 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3947 &exception);
3948 } while (exception.retry);
3949 return err;
3950}
3951
3952/*
3953 * TODO: For the time being, we don't try to get any attributes
3954 * along with any of the zero-copy operations READ, READDIR,
3955 * READLINK, WRITE.
3956 *
3957 * In the case of the first three, we want to put the GETATTR
3958 * after the read-type operation -- this is because it is hard
3959 * to predict the length of a GETATTR response in v4, and thus
3960 * align the READ data correctly. This means that the GETATTR
3961 * may end up partially falling into the page cache, and we should
3962 * shift it into the 'tail' of the xdr_buf before processing.
3963 * To do this efficiently, we need to know the total length
3964 * of data received, which doesn't seem to be available outside
3965 * of the RPC layer.
3966 *
3967 * In the case of WRITE, we also want to put the GETATTR after
3968 * the operation -- in this case because we want to make sure
140150db 3969 * we get the post-operation mtime and size.
1da177e4
LT		 3970 *
3971 * Both of these changes to the XDR layer would in fact be quite
3972 * minor, but I decided to leave them for a subsequent patch.
3973 */
3974static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3975 unsigned int pgbase, unsigned int pglen)
3976{
3977 struct nfs4_readlink args = {
3978 .fh = NFS_FH(inode),
3979 .pgbase = pgbase,
3980 .pglen = pglen,
3981 .pages = &page,
3982 };
f50c7000 3983 struct nfs4_readlink_res res;
1da177e4
LT		 3984 struct rpc_message msg = {
3985 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3986 .rpc_argp = &args,
f50c7000 3987 .rpc_resp = &res,
1da177e4
LT		 3988 };
3989
7c513058 3990 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3991}
3992
3993static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3994 unsigned int pgbase, unsigned int pglen)
3995{
3996 struct nfs4_exception exception = { };
3997 int err;
3998 do {
c1578b76
TM		 3999 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
4000 trace_nfs4_readlink(inode, err);
4001 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 4002 &exception);
4003 } while (exception.retry);
4004 return err;
4005}
4006
1da177e4 4007/*
8867fe58 4008 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 4009 */
1da177e4
LT		 4010static int
4011nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 4012 int flags)
1da177e4 4013{
dff25ddb 4014 struct nfs_server *server = NFS_SERVER(dir);
aa9c2669 4015 struct nfs4_label l, *ilabel = NULL;
8867fe58 4016 struct nfs_open_context *ctx;
1da177e4 4017 struct nfs4_state *state;
1da177e4
LT		 4018 int status = 0;
4019
532d4def 4020 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL);
8867fe58
MS		 4021 if (IS_ERR(ctx))
4022 return PTR_ERR(ctx);
4023
aa9c2669
DQ		 4024 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
4025
dff25ddb
AG		 4026 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4027 sattr->ia_mode &= ~current_umask();
c5c3fb5f 4028 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 4029 if (IS_ERR(state)) {
4030 status = PTR_ERR(state);
c0204fd2 4031 goto out;
1da177e4 4032 }
1da177e4 4033out:
aa9c2669 4034 nfs4_label_release_security(ilabel);
8867fe58 4035 put_nfs_open_context(ctx);
1da177e4
LT		 4036 return status;
4037}
4038
beffb8fe 4039static int _nfs4_proc_remove(struct inode *dir, const struct qstr *name)
1da177e4 4040{
16e42959 4041 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 4042 struct nfs_removeargs args = {
1da177e4 4043 .fh = NFS_FH(dir),
26fe5750 4044 .name = *name,
16e42959 4045 };
4fdc17b2 4046 struct nfs_removeres res = {
16e42959 4047 .server = server,
1da177e4 4048 };
1da177e4 4049 struct rpc_message msg = {
4fdc17b2
TM		 4050 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
4051 .rpc_argp = &args,
4052 .rpc_resp = &res,
1da177e4 4053 };
778d2817 4054 int status;
1da177e4 4055
7c513058 4056 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 4057 if (status == 0)
16e42959 4058 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 4059 return status;
4060}
4061
beffb8fe 4062static int nfs4_proc_remove(struct inode *dir, const struct qstr *name)
1da177e4
LT		 4063{
4064 struct nfs4_exception exception = { };
4065 int err;
4066 do {
078ea3df
TM		 4067 err = _nfs4_proc_remove(dir, name);
4068 trace_nfs4_remove(dir, name, err);
4069 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4070 &exception);
4071 } while (exception.retry);
4072 return err;
4073}
4074
e4eff1a6 4075static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 4076{
e4eff1a6
TM		 4077 struct nfs_server *server = NFS_SERVER(dir);
4078 struct nfs_removeargs *args = msg->rpc_argp;
4079 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 4080
e4eff1a6 4081 res->server = server;
1da177e4 4082 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 4083 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 4084
4085 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 4086}
4087
34e137cc
BS		 4088static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
4089{
884be175 4090 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb),
d9afbd1b
TM		 4091 &data->args.seq_args,
4092 &data->res.seq_res,
4093 task);
1da177e4
LT		 4094}
4095
e4eff1a6 4096static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 4097{
078ea3df
TM		 4098 struct nfs_unlinkdata *data = task->tk_calldata;
4099 struct nfs_removeres *res = &data->res;
e4eff1a6 4100
14516c3a
TM		 4101 if (!nfs4_sequence_done(task, &res->seq_res))
4102 return 0;
8478eaa1
N		 4103 if (nfs4_async_handle_error(task, res->server, NULL,
4104 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 4105 return 0;
4106 update_changeattr(dir, &res->cinfo);
e4eff1a6 4107 return 1;
1da177e4
LT		 4108}
4109
d3d4152a
JL		 4110static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
4111{
4112 struct nfs_server *server = NFS_SERVER(dir);
4113 struct nfs_renameargs *arg = msg->rpc_argp;
4114 struct nfs_renameres *res = msg->rpc_resp;
4115
4116 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 4117 res->server = server;
a9c92d6b 4118 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 4119}
4120
c6bfa1a1
BS		 4121static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
4122{
d9afbd1b
TM		 4123 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
4124 &data->args.seq_args,
4125 &data->res.seq_res,
4126 task);
d3d4152a
JL		 4127}
4128
4129static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
4130 struct inode *new_dir)
4131{
fbc6f7c2
TM		 4132 struct nfs_renamedata *data = task->tk_calldata;
4133 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 4134
4135 if (!nfs4_sequence_done(task, &res->seq_res))
4136 return 0;
8478eaa1 4137 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 4138 return 0;
4139
4140 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 4141 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 4142 return 1;
4143}
4144
beffb8fe 4145static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4 4146{
91ba2eee 4147 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 4148 struct nfs4_link_arg arg = {
4149 .fh = NFS_FH(inode),
4150 .dir_fh = NFS_FH(dir),
4151 .name = name,
91ba2eee
TM		 4152 .bitmask = server->attr_bitmask,
4153 };
91ba2eee
TM		 4154 struct nfs4_link_res res = {
4155 .server = server,
1775fd3e 4156 .label = NULL,
1da177e4 4157 };
1da177e4
LT		 4158 struct rpc_message msg = {
4159 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
4160 .rpc_argp = &arg,
91ba2eee 4161 .rpc_resp = &res,
1da177e4 4162 };
136f2627
TM		 4163 int status = -ENOMEM;
4164
4165 res.fattr = nfs_alloc_fattr();
778d2817 4166 if (res.fattr == NULL)
136f2627 4167 goto out;
1da177e4 4168
14c43f76
DQ		 4169 res.label = nfs4_label_alloc(server, GFP_KERNEL);
4170 if (IS_ERR(res.label)) {
4171 status = PTR_ERR(res.label);
4172 goto out;
4173 }
aa9c2669 4174 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 4175
7c513058 4176 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 4177 if (!status) {
4178 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 4179 status = nfs_post_op_update_inode(inode, res.fattr);
4180 if (!status)
4181 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 4182 }
14c43f76
DQ		 4183
4184
4185 nfs4_label_free(res.label);
4186
136f2627 4187out:
136f2627 4188 nfs_free_fattr(res.fattr);
1da177e4
LT		 4189 return status;
4190}
4191
beffb8fe 4192static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4
LT		 4193{
4194 struct nfs4_exception exception = { };
4195 int err;
4196 do {
4197 err = nfs4_handle_exception(NFS_SERVER(inode),
4198 _nfs4_proc_link(inode, dir, name),
4199 &exception);
4200 } while (exception.retry);
4201 return err;
4202}
4203
57dc9a57
TM		 4204struct nfs4_createdata {
4205 struct rpc_message msg;
4206 struct nfs4_create_arg arg;
4207 struct nfs4_create_res res;
4208 struct nfs_fh fh;
4209 struct nfs_fattr fattr;
1775fd3e 4210 struct nfs4_label *label;
57dc9a57
TM		 4211};
4212
4213static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
beffb8fe 4214 const struct qstr *name, struct iattr *sattr, u32 ftype)
57dc9a57
TM		 4215{
4216 struct nfs4_createdata *data;
4217
4218 data = kzalloc(sizeof(*data), GFP_KERNEL);
4219 if (data != NULL) {
4220 struct nfs_server *server = NFS_SERVER(dir);
4221
14c43f76
DQ		 4222 data->label = nfs4_label_alloc(server, GFP_KERNEL);
4223 if (IS_ERR(data->label))
4224 goto out_free;
4225
57dc9a57
TM		 4226 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
4227 data->msg.rpc_argp = &data->arg;
4228 data->msg.rpc_resp = &data->res;
4229 data->arg.dir_fh = NFS_FH(dir);
4230 data->arg.server = server;
4231 data->arg.name = name;
4232 data->arg.attrs = sattr;
4233 data->arg.ftype = ftype;
aa9c2669 4234 data->arg.bitmask = nfs4_bitmask(server, data->label);
dff25ddb 4235 data->arg.umask = current_umask();
57dc9a57
TM		 4236 data->res.server = server;
4237 data->res.fh = &data->fh;
4238 data->res.fattr = &data->fattr;
1775fd3e 4239 data->res.label = data->label;
57dc9a57 4240 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 4241 }
4242 return data;
14c43f76
DQ		 4243out_free:
4244 kfree(data);
4245 return NULL;
57dc9a57
TM		 4246}
4247
4248static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
4249{
7c513058 4250 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 4251 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 4252 if (status == 0) {
4253 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 4254 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 4255 }
4256 return status;
4257}
4258
4259static void nfs4_free_createdata(struct nfs4_createdata *data)
4260{
14c43f76 4261 nfs4_label_free(data->label);
57dc9a57
TM		 4262 kfree(data);
4263}
4264
4f390c15 4265static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 4266 struct page *page, unsigned int len, struct iattr *sattr,
4267 struct nfs4_label *label)
1da177e4 4268{
57dc9a57
TM		 4269 struct nfs4_createdata *data;
4270 int status = -ENAMETOOLONG;
1da177e4 4271
94a6d753 4272 if (len > NFS4_MAXPATHLEN)
57dc9a57 4273 goto out;
4f390c15 4274
57dc9a57
TM		 4275 status = -ENOMEM;
4276 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
4277 if (data == NULL)
4278 goto out;
4279
4280 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
4281 data->arg.u.symlink.pages = &page;
4282 data->arg.u.symlink.len = len;
1775fd3e 4283 data->arg.label = label;
1da177e4 4284
57dc9a57
TM		 4285 status = nfs4_do_create(dir, dentry, data);
4286
4287 nfs4_free_createdata(data);
4288out:
1da177e4
LT		 4289 return status;
4290}
4291
4f390c15 4292static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 4293 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 4294{
4295 struct nfs4_exception exception = { };
aa9c2669 4296 struct nfs4_label l, *label = NULL;
1da177e4 4297 int err;
aa9c2669
DQ		 4298
4299 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4300
1da177e4 4301 do {
078ea3df
TM		 4302 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4303 trace_nfs4_symlink(dir, &dentry->d_name, err);
4304 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4305 &exception);
4306 } while (exception.retry);
aa9c2669
DQ		 4307
4308 nfs4_label_release_security(label);
1da177e4
LT		 4309 return err;
4310}
4311
4312static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 4313 struct iattr *sattr, struct nfs4_label *label)
1da177e4 4314{
57dc9a57
TM		 4315 struct nfs4_createdata *data;
4316 int status = -ENOMEM;
1da177e4 4317
57dc9a57
TM		 4318 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4319 if (data == NULL)
4320 goto out;
4321
1775fd3e 4322 data->arg.label = label;
57dc9a57
TM		 4323 status = nfs4_do_create(dir, dentry, data);
4324
4325 nfs4_free_createdata(data);
4326out:
1da177e4
LT		 4327 return status;
4328}
4329
4330static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4331 struct iattr *sattr)
4332{
dff25ddb 4333 struct nfs_server *server = NFS_SERVER(dir);
1da177e4 4334 struct nfs4_exception exception = { };
aa9c2669 4335 struct nfs4_label l, *label = NULL;
1da177e4 4336 int err;
a8a5da99 4337
aa9c2669
DQ		 4338 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4339
dff25ddb
AG		 4340 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4341 sattr->ia_mode &= ~current_umask();
1da177e4 4342 do {
078ea3df
TM		 4343 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4344 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4345 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4346 &exception);
4347 } while (exception.retry);
aa9c2669
DQ		 4348 nfs4_label_release_security(label);
4349
1da177e4
LT		 4350 return err;
4351}
4352
4353static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4354 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4 4355{
2b0143b5 4356 struct inode *dir = d_inode(dentry);
1da177e4
LT		 4357 struct nfs4_readdir_arg args = {
4358 .fh = NFS_FH(dir),
56e4ebf8 4359 .pages = pages,
1da177e4
LT		 4360 .pgbase = 0,
4361 .count = count,
2b0143b5 4362 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 4363 .plus = plus,
1da177e4
LT		 4364 };
4365 struct nfs4_readdir_res res;
4366 struct rpc_message msg = {
4367 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4368 .rpc_argp = &args,
4369 .rpc_resp = &res,
4370 .rpc_cred = cred,
4371 };
4372 int status;
4373
6de1472f
AV		 4374 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4375 dentry,
eadf4598 4376 (unsigned long long)cookie);
c3f52af3 4377 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 4378 res.pgbase = args.pgbase;
7c513058 4379 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 4380 if (status >= 0) {
c3f52af3 4381 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 4382 status += args.pgbase;
4383 }
c4812998
TM		 4384
4385 nfs_invalidate_atime(dir);
4386
3110ff80 4387 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 4388 return status;
4389}
4390
4391static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4392 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 4393{
4394 struct nfs4_exception exception = { };
4395 int err;
4396 do {
c1578b76
TM		 4397 err = _nfs4_proc_readdir(dentry, cred, cookie,
4398 pages, count, plus);
2b0143b5
DH		 4399 trace_nfs4_readdir(d_inode(dentry), err);
4400 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 4401 &exception);
4402 } while (exception.retry);
4403 return err;
4404}
4405
4406static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 4407 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 4408{
57dc9a57
TM		 4409 struct nfs4_createdata *data;
4410 int mode = sattr->ia_mode;
4411 int status = -ENOMEM;
1da177e4 4412
57dc9a57
TM		 4413 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4414 if (data == NULL)
4415 goto out;
4416
1da177e4 4417 if (S_ISFIFO(mode))
57dc9a57 4418 data->arg.ftype = NF4FIFO;
1da177e4 4419 else if (S_ISBLK(mode)) {
57dc9a57
TM		 4420 data->arg.ftype = NF4BLK;
4421 data->arg.u.device.specdata1 = MAJOR(rdev);
4422 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 4423 }
4424 else if (S_ISCHR(mode)) {
57dc9a57
TM		 4425 data->arg.ftype = NF4CHR;
4426 data->arg.u.device.specdata1 = MAJOR(rdev);
4427 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 4428 } else if (!S_ISSOCK(mode)) {
4429 status = -EINVAL;
4430 goto out_free;
1da177e4 4431 }
1775fd3e 4432
aa9c2669 4433 data->arg.label = label;
57dc9a57 4434 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 4435out_free:
57dc9a57
TM		 4436 nfs4_free_createdata(data);
4437out:
1da177e4
LT		 4438 return status;
4439}
4440
4441static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4442 struct iattr *sattr, dev_t rdev)
4443{
dff25ddb 4444 struct nfs_server *server = NFS_SERVER(dir);
1da177e4 4445 struct nfs4_exception exception = { };
aa9c2669 4446 struct nfs4_label l, *label = NULL;
1da177e4 4447 int err;
a8a5da99 4448
aa9c2669
DQ		 4449 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4450
dff25ddb
AG		 4451 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4452 sattr->ia_mode &= ~current_umask();
1da177e4 4453 do {
078ea3df
TM		 4454 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4455 trace_nfs4_mknod(dir, &dentry->d_name, err);
4456 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4457 &exception);
4458 } while (exception.retry);
aa9c2669
DQ		 4459
4460 nfs4_label_release_security(label);
4461
1da177e4
LT		 4462 return err;
4463}
4464
4465static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4466 struct nfs_fsstat *fsstat)
4467{
4468 struct nfs4_statfs_arg args = {
4469 .fh = fhandle,
4470 .bitmask = server->attr_bitmask,
4471 };
24ad148a
BH		 4472 struct nfs4_statfs_res res = {
4473 .fsstat = fsstat,
4474 };
1da177e4
LT		 4475 struct rpc_message msg = {
4476 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4477 .rpc_argp = &args,
24ad148a 4478 .rpc_resp = &res,
1da177e4
LT		 4479 };
4480
0e574af1 4481 nfs_fattr_init(fsstat->fattr);
7c513058 4482 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4483}
4484
4485static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4486{
4487 struct nfs4_exception exception = { };
4488 int err;
4489 do {
4490 err = nfs4_handle_exception(server,
4491 _nfs4_proc_statfs(server, fhandle, fsstat),
4492 &exception);
4493 } while (exception.retry);
4494 return err;
4495}
4496
4497static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4498 struct nfs_fsinfo *fsinfo)
4499{
4500 struct nfs4_fsinfo_arg args = {
4501 .fh = fhandle,
4502 .bitmask = server->attr_bitmask,
4503 };
3dda5e43
BH		 4504 struct nfs4_fsinfo_res res = {
4505 .fsinfo = fsinfo,
4506 };
1da177e4
LT		 4507 struct rpc_message msg = {
4508 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4509 .rpc_argp = &args,
3dda5e43 4510 .rpc_resp = &res,
1da177e4
LT		 4511 };
4512
7c513058 4513 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4514}
4515
4516static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4517{
4518 struct nfs4_exception exception = { };
83ca7f5a 4519 unsigned long now = jiffies;
1da177e4
LT		 4520 int err;
4521
4522 do {
83ca7f5a 4523 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4524 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a 4525 if (err == 0) {
fb10fb67
TM		 4526 nfs4_set_lease_period(server->nfs_client,
4527 fsinfo->lease_time * HZ,
4528 now);
83ca7f5a
CL		 4529 break;
4530 }
4531 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4532 } while (exception.retry);
4533 return err;
4534}
4535
4536static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4537{
e38eb650
BS		 4538 int error;
4539
0e574af1 4540 nfs_fattr_init(fsinfo->fattr);
e38eb650 4541 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4542 if (error == 0) {
4543 /* block layout checks this! */
4544 server->pnfs_blksize = fsinfo->blksize;
ca440c38 4545 set_pnfs_layoutdriver(server, fhandle, fsinfo);
dc182549 4546 }
e38eb650
BS		 4547
4548 return error;
1da177e4
LT		 4549}
4550
4551static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4552 struct nfs_pathconf *pathconf)
4553{
4554 struct nfs4_pathconf_arg args = {
4555 .fh = fhandle,
4556 .bitmask = server->attr_bitmask,
4557 };
d45b2989
BH		 4558 struct nfs4_pathconf_res res = {
4559 .pathconf = pathconf,
4560 };
1da177e4
LT		 4561 struct rpc_message msg = {
4562 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4563 .rpc_argp = &args,
d45b2989 4564 .rpc_resp = &res,
1da177e4
LT		 4565 };
4566
4567 /* None of the pathconf attributes are mandatory to implement */
4568 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4569 memset(pathconf, 0, sizeof(*pathconf));
4570 return 0;
4571 }
4572
0e574af1 4573 nfs_fattr_init(pathconf->fattr);
7c513058 4574 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4575}
4576
4577static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4578 struct nfs_pathconf *pathconf)
4579{
4580 struct nfs4_exception exception = { };
4581 int err;
4582
4583 do {
4584 err = nfs4_handle_exception(server,
4585 _nfs4_proc_pathconf(server, fhandle, pathconf),
4586 &exception);
4587 } while (exception.retry);
4588 return err;
4589}
4590
5521abfd 4591int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4592 const struct nfs_open_context *ctx,
4593 const struct nfs_lock_context *l_ctx,
4594 fmode_t fmode)
4595{
17393475 4596 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL);
9b206149
TM		 4597}
4598EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4599
5521abfd
TM		 4600static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4601 const struct nfs_open_context *ctx,
4602 const struct nfs_lock_context *l_ctx,
4603 fmode_t fmode)
4604{
4605 nfs4_stateid current_stateid;
4606
e1253be0
TM		 4607 /* If the current stateid represents a lost lock, then exit */
4608 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4609 return true;
5521abfd
TM		 4610 return nfs4_stateid_match(stateid, &current_stateid);
4611}
4612
4613static bool nfs4_error_stateid_expired(int err)
4614{
4615 switch (err) {
4616 case -NFS4ERR_DELEG_REVOKED:
4617 case -NFS4ERR_ADMIN_REVOKED:
4618 case -NFS4ERR_BAD_STATEID:
4619 case -NFS4ERR_STALE_STATEID:
4620 case -NFS4ERR_OLD_STATEID:
4621 case -NFS4ERR_OPENMODE:
4622 case -NFS4ERR_EXPIRED:
4623 return true;
4624 }
4625 return false;
4626}
4627
d45f60c6 4628static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4629{
d45f60c6 4630 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4631
d45f60c6 4632 trace_nfs4_read(hdr, task->tk_status);
9c27869d
TM		 4633 if (task->tk_status < 0) {
4634 struct nfs4_exception exception = {
4635 .inode = hdr->inode,
4636 .state = hdr->args.context->state,
4637 .stateid = &hdr->args.stateid,
4638 };
4639 task->tk_status = nfs4_async_handle_exception(task,
4640 server, task->tk_status, &exception);
4641 if (exception.retry) {
4642 rpc_restart_call_prepare(task);
4643 return -EAGAIN;
4644 }
1da177e4 4645 }
8850df99 4646
1da177e4 4647 if (task->tk_status > 0)
d45f60c6 4648 renew_lease(server, hdr->timestamp);
ec06c096 4649 return 0;
1da177e4
LT		 4650}
4651
5521abfd 4652static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4653 struct nfs_pgio_args *args)
5521abfd
TM		 4654{
4655
4656 if (!nfs4_error_stateid_expired(task->tk_status) ||
4657 nfs4_stateid_is_current(&args->stateid,
4658 args->context,
4659 args->lock_context,
4660 FMODE_READ))
4661 return false;
4662 rpc_restart_call_prepare(task);
4663 return true;
4664}
4665
d45f60c6 4666static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4667{
4668
4669 dprintk("--> %s\n", __func__);
4670
d45f60c6 4671 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4672 return -EAGAIN;
d45f60c6 4673 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4674 return -EAGAIN;
bfc505de
TM		 4675 if (task->tk_status > 0)
4676 nfs_invalidate_atime(hdr->inode);
d45f60c6
WAA		 4677 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4678 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4679}
4680
d45f60c6
WAA		 4681static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4682 struct rpc_message *msg)
1da177e4 4683{
d45f60c6 4684 hdr->timestamp = jiffies;
ca857cc1
TM		 4685 if (!hdr->pgio_done_cb)
4686 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4687 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4688 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4689}
4690
d45f60c6
WAA		 4691static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4692 struct nfs_pgio_header *hdr)
ea7c3303 4693{
d45f60c6
WAA		 4694 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4695 &hdr->args.seq_args,
4696 &hdr->res.seq_res,
9b206149 4697 task))
ef1820f9 4698 return 0;
d45f60c6
WAA		 4699 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4700 hdr->args.lock_context,
4701 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4702 return -EIO;
d45f60c6 4703 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4704 return -EIO;
4705 return 0;
1da177e4
LT		 4706}
4707
d45f60c6
WAA		 4708static int nfs4_write_done_cb(struct rpc_task *task,
4709 struct nfs_pgio_header *hdr)
1da177e4 4710{
d45f60c6 4711 struct inode *inode = hdr->inode;
8478eaa1 4712
d45f60c6 4713 trace_nfs4_write(hdr, task->tk_status);
9c27869d
TM		 4714 if (task->tk_status < 0) {
4715 struct nfs4_exception exception = {
4716 .inode = hdr->inode,
4717 .state = hdr->args.context->state,
4718 .stateid = &hdr->args.stateid,
4719 };
4720 task->tk_status = nfs4_async_handle_exception(task,
4721 NFS_SERVER(inode), task->tk_status,
4722 &exception);
4723 if (exception.retry) {
4724 rpc_restart_call_prepare(task);
4725 return -EAGAIN;
4726 }
1da177e4 4727 }
4f9838c7 4728 if (task->tk_status >= 0) {
d45f60c6 4729 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4730 nfs_writeback_update_inode(hdr);
4f9838c7 4731 }
788e7a89 4732 return 0;
1da177e4
LT		 4733}
4734
5521abfd 4735static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4736 struct nfs_pgio_args *args)
5521abfd
TM		 4737{
4738
4739 if (!nfs4_error_stateid_expired(task->tk_status) ||
4740 nfs4_stateid_is_current(&args->stateid,
4741 args->context,
4742 args->lock_context,
4743 FMODE_WRITE))
4744 return false;
4745 rpc_restart_call_prepare(task);
4746 return true;
4747}
4748
d45f60c6 4749static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4750{
d45f60c6 4751 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4752 return -EAGAIN;
d45f60c6 4753 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4754 return -EAGAIN;
d45f60c6
WAA		 4755 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4756 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4757}
4758
5a37f851 4759static
d45f60c6 4760bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4761{
5a37f851 4762 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4763 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4764 return false;
4765 /* Otherwise, request attributes if and only if we don't hold
4766 * a delegation
4767 */
011e2a7f 4768 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4769}
a69aef14 4770
d45f60c6
WAA		 4771static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4772 struct rpc_message *msg)
1da177e4 4773{
d45f60c6 4774 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4775
d45f60c6
WAA		 4776 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4777 hdr->args.bitmask = NULL;
4778 hdr->res.fattr = NULL;
7ffd1064 4779 } else
d45f60c6 4780 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4781
d45f60c6
WAA		 4782 if (!hdr->pgio_done_cb)
4783 hdr->pgio_done_cb = nfs4_write_done_cb;
4784 hdr->res.server = server;
4785 hdr->timestamp = jiffies;
1da177e4 4786
bdc7f021 4787 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4788 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4789}
4790
0b7c0153 4791static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4792{
d9afbd1b
TM		 4793 nfs4_setup_sequence(NFS_SERVER(data->inode),
4794 &data->args.seq_args,
4795 &data->res.seq_res,
4796 task);
1da177e4
LT		 4797}
4798
0b7c0153 4799static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4800{
1da177e4 4801 struct inode *inode = data->inode;
14516c3a 4802
cc668ab3 4803 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4804 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4805 NULL, NULL) == -EAGAIN) {
d00c5d43 4806 rpc_restart_call_prepare(task);
788e7a89 4807 return -EAGAIN;
1da177e4 4808 }
788e7a89 4809 return 0;
1da177e4
LT		 4810}
4811
0b7c0153 4812static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4813{
4814 if (!nfs4_sequence_done(task, &data->res.seq_res))
4815 return -EAGAIN;
0b7c0153 4816 return data->commit_done_cb(task, data);
5f452431
FI		 4817}
4818
0b7c0153 4819static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4820{
788e7a89 4821 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4822
0b7c0153
FI		 4823 if (data->commit_done_cb == NULL)
4824 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4825 data->res.server = server;
bdc7f021 4826 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4827 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4828}
4829
9bc4e3ca
CL		 4830struct nfs4_renewdata {
4831 struct nfs_client *client;
4832 unsigned long timestamp;
4833};
4834
1da177e4
LT		 4835/*
4836 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4837 * standalone procedure for queueing an asynchronous RENEW.
4838 */
9bc4e3ca 4839static void nfs4_renew_release(void *calldata)
dc96aef9 4840{
9bc4e3ca
CL		 4841 struct nfs4_renewdata *data = calldata;
4842 struct nfs_client *clp = data->client;
dc96aef9 4843
0851de06
AB		 4844 if (atomic_read(&clp->cl_count) > 1)
4845 nfs4_schedule_state_renewal(clp);
4846 nfs_put_client(clp);
9bc4e3ca 4847 kfree(data);
dc96aef9
AB		 4848}
4849
9bc4e3ca 4850static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4851{
9bc4e3ca
CL		 4852 struct nfs4_renewdata *data = calldata;
4853 struct nfs_client *clp = data->client;
4854 unsigned long timestamp = data->timestamp;
1da177e4 4855
c6d01c6f 4856 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4857 switch (task->tk_status) {
4858 case 0:
4859 break;
4860 case -NFS4ERR_LEASE_MOVED:
4861 nfs4_schedule_lease_moved_recovery(clp);
4862 break;
4863 default:
95baa25c 4864 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4865 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4866 return;
4867 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4868 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4869 return;
4870 }
4871 nfs4_schedule_path_down_recovery(clp);
1da177e4 4872 }
452e9352 4873 do_renew_lease(clp, timestamp);
1da177e4
LT		 4874}
4875
963d8fe5
TM		 4876static const struct rpc_call_ops nfs4_renew_ops = {
4877 .rpc_call_done = nfs4_renew_done,
dc96aef9 4878 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4879};
4880
2f60ea6b 4881static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4882{
4883 struct rpc_message msg = {
4884 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4885 .rpc_argp = clp,
b4454fe1 4886 .rpc_cred = cred,
1da177e4 4887 };
9bc4e3ca 4888 struct nfs4_renewdata *data;
1da177e4 4889
2f60ea6b
TM		 4890 if (renew_flags == 0)
4891 return 0;
0851de06
AB		 4892 if (!atomic_inc_not_zero(&clp->cl_count))
4893 return -EIO;
b569ad34 4894 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4895 if (data == NULL)
4896 return -ENOMEM;
4897 data->client = clp;
4898 data->timestamp = jiffies;
bc7a05ca 4899 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4900 &nfs4_renew_ops, data);
1da177e4
LT		 4901}
4902
8534d4ec 4903static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4904{
4905 struct rpc_message msg = {
4906 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4907 .rpc_argp = clp,
b4454fe1 4908 .rpc_cred = cred,
1da177e4
LT		 4909 };
4910 unsigned long now = jiffies;
4911 int status;
4912
bc7a05ca 4913 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4914 if (status < 0)
4915 return status;
452e9352 4916 do_renew_lease(clp, now);
1da177e4
LT		 4917 return 0;
4918}
4919
aa1870af
BF		 4920static inline int nfs4_server_supports_acls(struct nfs_server *server)
4921{
7dd7d959 4922 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4923}
4924
21f498c2
TM		 4925/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4926 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4927 * the stack.
4928 */
21f498c2 4929#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4930
e9e3d724 4931static int buf_to_pages_noslab(const void *buf, size_t buflen,
8fbcf237 4932 struct page **pages)
e9e3d724
NH		 4933{
4934 struct page *newpage, **spages;
4935 int rc = 0;
4936 size_t len;
4937 spages = pages;
4938
4939 do {
21f498c2 4940 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4941 newpage = alloc_page(GFP_KERNEL);
4942
4943 if (newpage == NULL)
4944 goto unwind;
4945 memcpy(page_address(newpage), buf, len);
4946 buf += len;
4947 buflen -= len;
4948 *pages++ = newpage;
4949 rc++;
4950 } while (buflen != 0);
4951
4952 return rc;
4953
4954unwind:
4955 for(; rc > 0; rc--)
4956 __free_page(spages[rc-1]);
4957 return -ENOMEM;
4958}
4959
e50a1c2e
BF		 4960struct nfs4_cached_acl {
4961 int cached;
4962 size_t len;
3e9d4154 4963 char data[0];
e50a1c2e
BF		 4964};
4965
4966static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4967{
4968 struct nfs_inode *nfsi = NFS_I(inode);
4969
4970 spin_lock(&inode->i_lock);
4971 kfree(nfsi->nfs4_acl);
4972 nfsi->nfs4_acl = acl;
4973 spin_unlock(&inode->i_lock);
4974}
4975
4976static void nfs4_zap_acl_attr(struct inode *inode)
4977{
4978 nfs4_set_cached_acl(inode, NULL);
4979}
4980
4981static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4982{
4983 struct nfs_inode *nfsi = NFS_I(inode);
4984 struct nfs4_cached_acl *acl;
4985 int ret = -ENOENT;
4986
4987 spin_lock(&inode->i_lock);
4988 acl = nfsi->nfs4_acl;
4989 if (acl == NULL)
4990 goto out;
4991 if (buf == NULL) /* user is just asking for length */
4992 goto out_len;
4993 if (acl->cached == 0)
4994 goto out;
4995 ret = -ERANGE; /* see getxattr(2) man page */
4996 if (acl->len > buflen)
4997 goto out;
4998 memcpy(buf, acl->data, acl->len);
4999out_len:
5000 ret = acl->len;
5001out:
5002 spin_unlock(&inode->i_lock);
5003 return ret;
5004}
5005
5794d21e 5006static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 5007{
5008 struct nfs4_cached_acl *acl;
b291f1b1 5009 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 5010
1f1ea6c2 5011 if (buflen <= PAGE_SIZE) {
b291f1b1 5012 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 5013 if (acl == NULL)
5014 goto out;
5015 acl->cached = 1;
5794d21e 5016 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 5017 } else {
5018 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
5019 if (acl == NULL)
5020 goto out;
5021 acl->cached = 0;
5022 }
5023 acl->len = acl_len;
5024out:
5025 nfs4_set_cached_acl(inode, acl);
5026}
5027
bf118a34
AA		 5028/*
5029 * The getxattr API returns the required buffer length when called with a
5030 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
5031 * the required buf. On a NULL buf, we send a page of data to the server
5032 * guessing that the ACL request can be serviced by a page. If so, we cache
5033 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
5034 * the cache. If not so, we throw away the page, and cache the required
5035 * length. The next getxattr call will then produce another round trip to
5036 * the server, this time with the input buf of the required size.
5037 */
16b4289c 5038static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 5039{
bf118a34 5040 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 5041 struct nfs_getaclargs args = {
5042 .fh = NFS_FH(inode),
5043 .acl_pages = pages,
5044 .acl_len = buflen,
5045 };
663c79b3
BH		 5046 struct nfs_getaclres res = {
5047 .acl_len = buflen,
5048 };
aa1870af
BF		 5049 struct rpc_message msg = {
5050 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
5051 .rpc_argp = &args,
663c79b3 5052 .rpc_resp = &res,
aa1870af 5053 };
21f498c2
TM		 5054 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
5055 int ret = -ENOMEM, i;
aa1870af 5056
bf118a34
AA		 5057 /* As long as we're doing a round trip to the server anyway,
5058 * let's be prepared for a page of acl data. */
5059 if (npages == 0)
5060 npages = 1;
21f498c2
TM		 5061 if (npages > ARRAY_SIZE(pages))
5062 return -ERANGE;
5a006899 5063
bf118a34
AA		 5064 for (i = 0; i < npages; i++) {
5065 pages[i] = alloc_page(GFP_KERNEL);
5066 if (!pages[i])
5067 goto out_free;
e50a1c2e 5068 }
5a006899
SP		 5069
5070 /* for decoding across pages */
5071 res.acl_scratch = alloc_page(GFP_KERNEL);
5072 if (!res.acl_scratch)
5073 goto out_free;
5074
bf118a34 5075 args.acl_len = npages * PAGE_SIZE;
5a006899 5076
de040bec 5077 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 5078 __func__, buf, buflen, npages, args.acl_len);
5079 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
5080 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 5081 if (ret)
5082 goto out_free;
bf118a34 5083
1f1ea6c2
TM		 5084 /* Handle the case where the passed-in buffer is too short */
5085 if (res.acl_flags & NFS4_ACL_TRUNC) {
5086 /* Did the user only issue a request for the acl length? */
5087 if (buf == NULL)
5088 goto out_ok;
e50a1c2e 5089 ret = -ERANGE;
1f1ea6c2 5090 goto out_free;
e50a1c2e 5091 }
1f1ea6c2 5092 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 5093 if (buf) {
5094 if (res.acl_len > buflen) {
5095 ret = -ERANGE;
5096 goto out_free;
5097 }
1f1ea6c2 5098 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 5099 }
1f1ea6c2
TM		 5100out_ok:
5101 ret = res.acl_len;
e50a1c2e 5102out_free:
bf118a34
AA		 5103 for (i = 0; i < npages; i++)
5104 if (pages[i])
5105 __free_page(pages[i]);
331818f1
TM		 5106 if (res.acl_scratch)
5107 __free_page(res.acl_scratch);
aa1870af
BF		 5108 return ret;
5109}
5110
16b4289c
TM		 5111static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5112{
5113 struct nfs4_exception exception = { };
5114 ssize_t ret;
5115 do {
5116 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 5117 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 5118 if (ret >= 0)
5119 break;
5120 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
5121 } while (exception.retry);
5122 return ret;
5123}
5124
e50a1c2e
BF		 5125static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
5126{
5127 struct nfs_server *server = NFS_SERVER(inode);
5128 int ret;
5129
5130 if (!nfs4_server_supports_acls(server))
5131 return -EOPNOTSUPP;
5132 ret = nfs_revalidate_inode(server, inode);
5133 if (ret < 0)
5134 return ret;
08a22b39
AK		 5135 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
5136 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 5137 ret = nfs4_read_cached_acl(inode, buf, buflen);
5138 if (ret != -ENOENT)
bf118a34
AA		 5139 /* -ENOENT is returned if there is no ACL or if there is an ACL
5140 * but no cached acl data, just the acl length */
e50a1c2e
BF		 5141 return ret;
5142 return nfs4_get_acl_uncached(inode, buf, buflen);
5143}
5144
16b4289c 5145static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 5146{
5147 struct nfs_server *server = NFS_SERVER(inode);
5148 struct page *pages[NFS4ACL_MAXPAGES];
5149 struct nfs_setaclargs arg = {
5150 .fh = NFS_FH(inode),
5151 .acl_pages = pages,
5152 .acl_len = buflen,
5153 };
73c403a9 5154 struct nfs_setaclres res;
4b580ee3
BF		 5155 struct rpc_message msg = {
5156 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
5157 .rpc_argp = &arg,
73c403a9 5158 .rpc_resp = &res,
4b580ee3 5159 };
21f498c2 5160 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 5161 int ret, i;
4b580ee3
BF		 5162
5163 if (!nfs4_server_supports_acls(server))
5164 return -EOPNOTSUPP;
21f498c2
TM		 5165 if (npages > ARRAY_SIZE(pages))
5166 return -ERANGE;
8fbcf237 5167 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
e9e3d724
NH		 5168 if (i < 0)
5169 return i;
57ec14c5 5170 nfs4_inode_return_delegation(inode);
7c513058 5171 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 5172
5173 /*
5174 * Free each page after tx, so the only ref left is
5175 * held by the network stack
5176 */
5177 for (; i > 0; i--)
5178 put_page(pages[i-1]);
5179
08a22b39
AK		 5180 /*
5181 * Acl update can result in inode attribute update.
5182 * so mark the attribute cache invalid.
5183 */
5184 spin_lock(&inode->i_lock);
5185 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
5186 spin_unlock(&inode->i_lock);
f41f7418
TM		 5187 nfs_access_zap_cache(inode);
5188 nfs_zap_acl_cache(inode);
4b580ee3
BF		 5189 return ret;
5190}
5191
16b4289c
TM		 5192static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5193{
5194 struct nfs4_exception exception = { };
5195 int err;
5196 do {
c1578b76
TM		 5197 err = __nfs4_proc_set_acl(inode, buf, buflen);
5198 trace_nfs4_set_acl(inode, err);
5199 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 5200 &exception);
5201 } while (exception.retry);
5202 return err;
5203}
5204
aa9c2669
DQ		 5205#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5206static int _nfs4_get_security_label(struct inode *inode, void *buf,
5207 size_t buflen)
5208{
5209 struct nfs_server *server = NFS_SERVER(inode);
5210 struct nfs_fattr fattr;
5211 struct nfs4_label label = {0, 0, buflen, buf};
5212
5213 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 5214 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 5215 .fh = NFS_FH(inode),
5216 .bitmask = bitmask,
5217 };
5218 struct nfs4_getattr_res res = {
5219 .fattr = &fattr,
5220 .label = &label,
5221 .server = server,
5222 };
5223 struct rpc_message msg = {
5224 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 5225 .rpc_argp = &arg,
aa9c2669
DQ		 5226 .rpc_resp = &res,
5227 };
5228 int ret;
5229
5230 nfs_fattr_init(&fattr);
5231
fcb63a9b 5232 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 5233 if (ret)
5234 return ret;
5235 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
5236 return -ENOENT;
5237 if (buflen < label.len)
5238 return -ERANGE;
5239 return 0;
5240}
5241
5242static int nfs4_get_security_label(struct inode *inode, void *buf,
5243 size_t buflen)
5244{
5245 struct nfs4_exception exception = { };
5246 int err;
5247
5248 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5249 return -EOPNOTSUPP;
5250
5251 do {
c1578b76
TM		 5252 err = _nfs4_get_security_label(inode, buf, buflen);
5253 trace_nfs4_get_security_label(inode, err);
5254 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5255 &exception);
5256 } while (exception.retry);
5257 return err;
5258}
5259
5260static int _nfs4_do_set_security_label(struct inode *inode,
5261 struct nfs4_label *ilabel,
5262 struct nfs_fattr *fattr,
5263 struct nfs4_label *olabel)
5264{
5265
5266 struct iattr sattr = {0};
5267 struct nfs_server *server = NFS_SERVER(inode);
5268 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 5269 struct nfs_setattrargs arg = {
aa9c2669
DQ		 5270 .fh = NFS_FH(inode),
5271 .iap = &sattr,
5272 .server = server,
5273 .bitmask = bitmask,
5274 .label = ilabel,
5275 };
5276 struct nfs_setattrres res = {
5277 .fattr = fattr,
5278 .label = olabel,
5279 .server = server,
5280 };
5281 struct rpc_message msg = {
5282 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 5283 .rpc_argp = &arg,
aa9c2669
DQ		 5284 .rpc_resp = &res,
5285 };
5286 int status;
5287
12207f69 5288 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 5289
12207f69 5290 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 5291 if (status)
5292 dprintk("%s failed: %d\n", __func__, status);
5293
5294 return status;
5295}
5296
5297static int nfs4_do_set_security_label(struct inode *inode,
5298 struct nfs4_label *ilabel,
5299 struct nfs_fattr *fattr,
5300 struct nfs4_label *olabel)
5301{
5302 struct nfs4_exception exception = { };
5303 int err;
5304
5305 do {
c1578b76
TM		 5306 err = _nfs4_do_set_security_label(inode, ilabel,
5307 fattr, olabel);
5308 trace_nfs4_set_security_label(inode, err);
5309 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5310 &exception);
5311 } while (exception.retry);
5312 return err;
5313}
5314
5315static int
59301226 5316nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
aa9c2669
DQ		 5317{
5318 struct nfs4_label ilabel, *olabel = NULL;
5319 struct nfs_fattr fattr;
5320 struct rpc_cred *cred;
aa9c2669
DQ		 5321 int status;
5322
5323 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5324 return -EOPNOTSUPP;
5325
5326 nfs_fattr_init(&fattr);
5327
5328 ilabel.pi = 0;
5329 ilabel.lfs = 0;
5330 ilabel.label = (char *)buf;
5331 ilabel.len = buflen;
5332
5333 cred = rpc_lookup_cred();
5334 if (IS_ERR(cred))
5335 return PTR_ERR(cred);
5336
5337 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5338 if (IS_ERR(olabel)) {
5339 status = -PTR_ERR(olabel);
5340 goto out;
5341 }
5342
5343 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5344 if (status == 0)
5345 nfs_setsecurity(inode, &fattr, olabel);
5346
5347 nfs4_label_free(olabel);
5348out:
5349 put_rpccred(cred);
5350 return status;
5351}
5352#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5353
5354
f092075d
CL		 5355static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5356 nfs4_verifier *bootverf)
cd93710e
CL		 5357{
5358 __be32 verf[2];
5359
2c820d9a
CL		 5360 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5361 /* An impossible timestamp guarantees this value
5362 * will never match a generated boot time. */
2f86e091
DD		 5363 verf[0] = cpu_to_be32(U32_MAX);
5364 verf[1] = cpu_to_be32(U32_MAX);
2c820d9a 5365 } else {
f092075d 5366 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
2f86e091
DD		 5367 u64 ns = ktime_to_ns(nn->boot_time);
5368
5369 verf[0] = cpu_to_be32(ns >> 32);
5370 verf[1] = cpu_to_be32(ns);
2c820d9a 5371 }
cd93710e
CL		 5372 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5373}
5374
a3192688
JL		 5375static int
5376nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 5377{
a3192688
JL		 5378 size_t len;
5379 char *str;
e984a55a 5380
ceb3a16c 5381 if (clp->cl_owner_id != NULL)
a3192688 5382 return 0;
4a3e5779 5383
a3192688 5384 rcu_read_lock();
4a70316c 5385 len = 14 + strlen(clp->cl_ipaddr) + 1 +
a3192688
JL		 5386 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5387 1 +
5388 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5389 1;
5390 rcu_read_unlock();
5391
5392 if (len > NFS4_OPAQUE_LIMIT + 1)
5393 return -EINVAL;
5394
5395 /*
5396 * Since this string is allocated at mount time, and held until the
5397 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5398 * about a memory-reclaim deadlock.
5399 */
5400 str = kmalloc(len, GFP_KERNEL);
5401 if (!str)
5402 return -ENOMEM;
ceb3a16c 5403
e984a55a 5404 rcu_read_lock();
f2dd436e 5405 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
a3192688
JL		 5406 clp->cl_ipaddr,
5407 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5408 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5409 rcu_read_unlock();
a3192688 5410
a3192688
JL		 5411 clp->cl_owner_id = str;
5412 return 0;
e984a55a
CL		 5413}
5414
873e3851
JL		 5415static int
5416nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5417{
873e3851
JL		 5418 size_t len;
5419 char *str;
5420
5421 len = 10 + 10 + 1 + 10 + 1 +
5422 strlen(nfs4_client_id_uniquifier) + 1 +
5423 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5424
5425 if (len > NFS4_OPAQUE_LIMIT + 1)
5426 return -EINVAL;
5427
5428 /*
5429 * Since this string is allocated at mount time, and held until the
5430 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5431 * about a memory-reclaim deadlock.
5432 */
5433 str = kmalloc(len, GFP_KERNEL);
5434 if (!str)
5435 return -ENOMEM;
5436
f2dd436e 5437 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
873e3851
JL		 5438 clp->rpc_ops->version, clp->cl_minorversion,
5439 nfs4_client_id_uniquifier,
5440 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5441 clp->cl_owner_id = str;
5442 return 0;
5443}
5444
5445static int
5446nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5447{
873e3851
JL		 5448 size_t len;
5449 char *str;
ceb3a16c
TM		 5450
5451 if (clp->cl_owner_id != NULL)
873e3851 5452 return 0;
6f2ea7f2
CL		 5453
5454 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5455 return nfs4_init_uniquifier_client_string(clp);
5456
5457 len = 10 + 10 + 1 + 10 + 1 +
5458 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5459
5460 if (len > NFS4_OPAQUE_LIMIT + 1)
5461 return -EINVAL;
5462
5463 /*
5464 * Since this string is allocated at mount time, and held until the
5465 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5466 * about a memory-reclaim deadlock.
5467 */
5468 str = kmalloc(len, GFP_KERNEL);
5469 if (!str)
5470 return -ENOMEM;
5471
f2dd436e 5472 scnprintf(str, len, "Linux NFSv%u.%u %s",
873e3851
JL		 5473 clp->rpc_ops->version, clp->cl_minorversion,
5474 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5475 clp->cl_owner_id = str;
5476 return 0;
e984a55a
CL		 5477}
5478
706cb8db
CL		 5479/*
5480 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5481 * services. Advertise one based on the address family of the
5482 * clientaddr.
5483 */
5484static unsigned int
5485nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5486{
5487 if (strchr(clp->cl_ipaddr, ':') != NULL)
5488 return scnprintf(buf, len, "tcp6");
5489 else
5490 return scnprintf(buf, len, "tcp");
5491}
5492
f11b2a1c
JL		 5493static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5494{
5495 struct nfs4_setclientid *sc = calldata;
5496
5497 if (task->tk_status == 0)
5498 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5499}
5500
5501static const struct rpc_call_ops nfs4_setclientid_ops = {
5502 .rpc_call_done = nfs4_setclientid_done,
5503};
5504
6bbb4ae8
CL		 5505/**
5506 * nfs4_proc_setclientid - Negotiate client ID
5507 * @clp: state data structure
5508 * @program: RPC program for NFSv4 callback service
5509 * @port: IP port number for NFS4 callback service
5510 * @cred: RPC credential to use for this call
5511 * @res: where to place the result
5512 *
5513 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5514 */
bb8b27e5
TM		 5515int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5516 unsigned short port, struct rpc_cred *cred,
5517 struct nfs4_setclientid_res *res)
1da177e4
LT		 5518{
5519 nfs4_verifier sc_verifier;
5520 struct nfs4_setclientid setclientid = {
5521 .sc_verifier = &sc_verifier,
5522 .sc_prog = program,
3a6bb738 5523 .sc_clnt = clp,
1da177e4
LT		 5524 };
5525 struct rpc_message msg = {
5526 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5527 .rpc_argp = &setclientid,
bb8b27e5 5528 .rpc_resp = res,
286d7d6a 5529 .rpc_cred = cred,
1da177e4 5530 };
f11b2a1c
JL		 5531 struct rpc_task *task;
5532 struct rpc_task_setup task_setup_data = {
5533 .rpc_client = clp->cl_rpcclient,
5534 .rpc_message = &msg,
5535 .callback_ops = &nfs4_setclientid_ops,
5536 .callback_data = &setclientid,
5537 .flags = RPC_TASK_TIMEOUT,
5538 };
6bbb4ae8 5539 int status;
1da177e4 5540
de734831 5541 /* nfs_client_id4 */
f092075d 5542 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5543
5544 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5545 status = nfs4_init_uniform_client_string(clp);
5546 else
a3192688 5547 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5548
5549 if (status)
5550 goto out;
3a6bb738 5551
de734831 5552 /* cb_client4 */
706cb8db
CL		 5553 setclientid.sc_netid_len =
5554 nfs4_init_callback_netid(clp,
5555 setclientid.sc_netid,
5556 sizeof(setclientid.sc_netid));
de734831 5557 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5558 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5559 clp->cl_ipaddr, port >> 8, port & 255);
5560
3a6bb738 5561 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5562 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5563 clp->cl_owner_id);
f11b2a1c
JL		 5564 task = rpc_run_task(&task_setup_data);
5565 if (IS_ERR(task)) {
5566 status = PTR_ERR(task);
5567 goto out;
5568 }
5569 status = task->tk_status;
5570 if (setclientid.sc_cred) {
5571 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5572 put_rpccred(setclientid.sc_cred);
5573 }
5574 rpc_put_task(task);
5575out:
c6d01c6f 5576 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5577 dprintk("NFS reply setclientid: %d\n", status);
5578 return status;
1da177e4
LT		 5579}
5580
6bbb4ae8
CL		 5581/**
5582 * nfs4_proc_setclientid_confirm - Confirm client ID
5583 * @clp: state data structure
5584 * @res: result of a previous SETCLIENTID
5585 * @cred: RPC credential to use for this call
5586 *
5587 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5588 */
fd954ae1 5589int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5590 struct nfs4_setclientid_res *arg,
5591 struct rpc_cred *cred)
1da177e4 5592{
1da177e4
LT		 5593 struct rpc_message msg = {
5594 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5595 .rpc_argp = arg,
286d7d6a 5596 .rpc_cred = cred,
1da177e4 5597 };
1da177e4
LT		 5598 int status;
5599
6bbb4ae8
CL		 5600 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5601 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5602 clp->cl_clientid);
1bd714f2 5603 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5604 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5605 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5606 return status;
5607}
5608
fe650407
TM		 5609struct nfs4_delegreturndata {
5610 struct nfs4_delegreturnargs args;
fa178f29 5611 struct nfs4_delegreturnres res;
fe650407
TM		 5612 struct nfs_fh fh;
5613 nfs4_stateid stateid;
26e976a8 5614 unsigned long timestamp;
586f1c39
TM		 5615 struct {
5616 struct nfs4_layoutreturn_args arg;
5617 struct nfs4_layoutreturn_res res;
4d796d75 5618 struct nfs4_xdr_opaque_data ld_private;
586f1c39
TM		 5619 u32 roc_barrier;
5620 bool roc;
5621 } lr;
fa178f29 5622 struct nfs_fattr fattr;
fe650407 5623 int rpc_status;
039b756a 5624 struct inode *inode;
fe650407
TM		 5625};
5626
fe650407
TM		 5627static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5628{
5629 struct nfs4_delegreturndata *data = calldata;
938e1010 5630
14516c3a
TM		 5631 if (!nfs4_sequence_done(task, &data->res.seq_res))
5632 return;
938e1010 5633
ca8acf8d 5634 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
586f1c39
TM		 5635
5636 /* Handle Layoutreturn errors */
5637 if (data->args.lr_args && task->tk_status != 0) {
5638 switch(data->res.lr_ret) {
5639 default:
5640 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
5641 break;
5642 case 0:
5643 data->args.lr_args = NULL;
5644 data->res.lr_res = NULL;
5645 break;
5646 case -NFS4ERR_ADMIN_REVOKED:
5647 case -NFS4ERR_DELEG_REVOKED:
5648 case -NFS4ERR_EXPIRED:
5649 case -NFS4ERR_BAD_STATEID:
5650 case -NFS4ERR_OLD_STATEID:
5651 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
5652 case -NFS4ERR_WRONG_CRED:
5653 data->args.lr_args = NULL;
5654 data->res.lr_res = NULL;
5655 data->res.lr_ret = 0;
5656 rpc_restart_call_prepare(task);
5657 return;
5658 }
5659 }
5660
79708861 5661 switch (task->tk_status) {
79708861 5662 case 0:
fa178f29 5663 renew_lease(data->res.server, data->timestamp);
23ea44c2 5664 break;
c97cf606
TM		 5665 case -NFS4ERR_ADMIN_REVOKED:
5666 case -NFS4ERR_DELEG_REVOKED:
26d36301
TM		 5667 case -NFS4ERR_EXPIRED:
5668 nfs4_free_revoked_stateid(data->res.server,
5669 data->args.stateid,
5670 task->tk_msg.rpc_cred);
c97cf606
TM		 5671 case -NFS4ERR_BAD_STATEID:
5672 case -NFS4ERR_OLD_STATEID:
5673 case -NFS4ERR_STALE_STATEID:
c97cf606
TM		 5674 task->tk_status = 0;
5675 break;
79708861 5676 default:
8478eaa1
N		 5677 if (nfs4_async_handle_error(task, data->res.server,
5678 NULL, NULL) == -EAGAIN) {
d00c5d43 5679 rpc_restart_call_prepare(task);
79708861
RL		 5680 return;
5681 }
5682 }
5683 data->rpc_status = task->tk_status;
fe650407
TM		 5684}
5685
5686static void nfs4_delegreturn_release(void *calldata)
5687{
039b756a 5688 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5689 struct inode *inode = data->inode;
039b756a 5690
ea7c38fe 5691 if (inode) {
586f1c39 5692 if (data->lr.roc)
1c5bd76d
TM		 5693 pnfs_roc_release(&data->lr.arg, &data->lr.res,
5694 data->res.lr_ret);
ea7c38fe
TM		 5695 nfs_iput_and_deactive(inode);
5696 }
fe650407
TM		 5697 kfree(calldata);
5698}
5699
938e1010
AA		 5700static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5701{
5702 struct nfs4_delegreturndata *d_data;
5703
5704 d_data = (struct nfs4_delegreturndata *)data;
5705
1c5bd76d 5706 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task))
500d701f
PT		 5707 return;
5708
d9afbd1b
TM		 5709 nfs4_setup_sequence(d_data->res.server,
5710 &d_data->args.seq_args,
5711 &d_data->res.seq_res,
5712 task);
938e1010 5713}
938e1010 5714
c8d149f3 5715static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5716 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5717 .rpc_call_done = nfs4_delegreturn_done,
5718 .rpc_release = nfs4_delegreturn_release,
5719};
5720
e6f81075 5721static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5722{
5723 struct nfs4_delegreturndata *data;
fa178f29 5724 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5725 struct rpc_task *task;
5138fde0
TM		 5726 struct rpc_message msg = {
5727 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5728 .rpc_cred = cred,
5729 };
c970aa85
TM		 5730 struct rpc_task_setup task_setup_data = {
5731 .rpc_client = server->client,
5138fde0 5732 .rpc_message = &msg,
c970aa85
TM		 5733 .callback_ops = &nfs4_delegreturn_ops,
5734 .flags = RPC_TASK_ASYNC,
5735 };
e6f81075 5736 int status = 0;
fe650407 5737
8535b2be 5738 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5739 if (data == NULL)
5740 return -ENOMEM;
a9c92d6b 5741 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
99ade3c7
AE		 5742
5743 nfs4_state_protect(server->nfs_client,
5744 NFS_SP4_MACH_CRED_CLEANUP,
5745 &task_setup_data.rpc_client, &msg);
5746
fe650407
TM		 5747 data->args.fhandle = &data->fh;
5748 data->args.stateid = &data->stateid;
9e907fec 5749 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5750 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5751 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5752 data->res.fattr = &data->fattr;
5753 data->res.server = server;
586f1c39 5754 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
4d796d75 5755 data->lr.arg.ld_private = &data->lr.ld_private;
5138fde0 5756 nfs_fattr_init(data->res.fattr);
26e976a8 5757 data->timestamp = jiffies;
fe650407 5758 data->rpc_status = 0;
53e6fc86 5759 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, cred);
ea7c38fe 5760 data->inode = nfs_igrab_and_active(inode);
1c5bd76d 5761 if (data->inode) {
1c5bd76d
TM		 5762 if (data->lr.roc) {
5763 data->args.lr_args = &data->lr.arg;
5764 data->res.lr_res = &data->lr.res;
5765 }
53e6fc86
TM		 5766 } else if (data->lr.roc) {
5767 pnfs_roc_release(&data->lr.arg, &data->lr.res, 0);
5768 data->lr.roc = false;
1c5bd76d 5769 }
fe650407 5770
c970aa85 5771 task_setup_data.callback_data = data;
1174dd1f
TM		 5772 msg.rpc_argp = &data->args;
5773 msg.rpc_resp = &data->res;
c970aa85 5774 task = rpc_run_task(&task_setup_data);
7a1218a2 5775 if (IS_ERR(task))
fe650407 5776 return PTR_ERR(task);
e6f81075
TM		 5777 if (!issync)
5778 goto out;
fe650407 5779 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5780 if (status != 0)
5781 goto out;
5782 status = data->rpc_status;
e144cbcc
TM		 5783 if (status == 0)
5784 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5785 else
5786 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5787out:
e6b3c4db 5788 rpc_put_task(task);
fe650407 5789 return status;
1da177e4
LT		 5790}
5791
e6f81075 5792int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5793{
5794 struct nfs_server *server = NFS_SERVER(inode);
5795 struct nfs4_exception exception = { };
5796 int err;
5797 do {
e6f81075 5798 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
48c9579a 5799 trace_nfs4_delegreturn(inode, stateid, err);
1da177e4
LT		 5800 switch (err) {
5801 case -NFS4ERR_STALE_STATEID:
5802 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5803 case 0:
5804 return 0;
5805 }
5806 err = nfs4_handle_exception(server, err, &exception);
5807 } while (exception.retry);
5808 return err;
5809}
5810
1da177e4
LT		 5811static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5812{
5813 struct inode *inode = state->inode;
5814 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5815 struct nfs_client *clp = server->nfs_client;
911d1aaf 5816 struct nfs_lockt_args arg = {
1da177e4 5817 .fh = NFS_FH(inode),
911d1aaf 5818 .fl = request,
1da177e4 5819 };
911d1aaf
TM		 5820 struct nfs_lockt_res res = {
5821 .denied = request,
1da177e4
LT		 5822 };
5823 struct rpc_message msg = {
5824 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5825 .rpc_argp = &arg,
5826 .rpc_resp = &res,
5827 .rpc_cred = state->owner->so_cred,
5828 };
1da177e4
LT		 5829 struct nfs4_lock_state *lsp;
5830 int status;
5831
911d1aaf 5832 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5833 status = nfs4_set_lock_state(state, request);
5834 if (status != 0)
5835 goto out;
5836 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5837 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5838 arg.lock_owner.s_dev = server->s_dev;
7c513058 5839 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5840 switch (status) {
5841 case 0:
5842 request->fl_type = F_UNLCK;
5843 break;
5844 case -NFS4ERR_DENIED:
5845 status = 0;
1da177e4 5846 }
70cc6487 5847 request->fl_ops->fl_release_private(request);
a6f951dd 5848 request->fl_ops = NULL;
8d0a8a9d 5849out:
1da177e4
LT		 5850 return status;
5851}
5852
5853static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5854{
5855 struct nfs4_exception exception = { };
5856 int err;
5857
5858 do {
d1b748a5
TM		 5859 err = _nfs4_proc_getlk(state, cmd, request);
5860 trace_nfs4_get_lock(request, state, cmd, err);
5861 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5862 &exception);
5863 } while (exception.retry);
5864 return err;
5865}
5866
faf5f49c 5867struct nfs4_unlockdata {
911d1aaf
TM		 5868 struct nfs_locku_args arg;
5869 struct nfs_locku_res res;
faf5f49c
TM		 5870 struct nfs4_lock_state *lsp;
5871 struct nfs_open_context *ctx;
911d1aaf 5872 struct file_lock fl;
516285eb 5873 struct nfs_server *server;
26e976a8 5874 unsigned long timestamp;
faf5f49c
TM		 5875};
5876
911d1aaf
TM		 5877static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5878 struct nfs_open_context *ctx,
5879 struct nfs4_lock_state *lsp,
5880 struct nfs_seqid *seqid)
5881{
5882 struct nfs4_unlockdata *p;
5883 struct inode *inode = lsp->ls_state->inode;
5884
8535b2be 5885 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5886 if (p == NULL)
5887 return NULL;
5888 p->arg.fh = NFS_FH(inode);
5889 p->arg.fl = &p->fl;
5890 p->arg.seqid = seqid;
c1d51931 5891 p->res.seqid = seqid;
911d1aaf
TM		 5892 p->lsp = lsp;
5893 atomic_inc(&lsp->ls_count);
5894 /* Ensure we don't close file until we're done freeing locks! */
5895 p->ctx = get_nfs_open_context(ctx);
5896 memcpy(&p->fl, fl, sizeof(p->fl));
5897 p->server = NFS_SERVER(inode);
5898 return p;
5899}
5900
06f814a3 5901static void nfs4_locku_release_calldata(void *data)
faf5f49c 5902{
963d8fe5 5903 struct nfs4_unlockdata *calldata = data;
911d1aaf 5904 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5905 nfs4_put_lock_state(calldata->lsp);
5906 put_nfs_open_context(calldata->ctx);
5907 kfree(calldata);
faf5f49c
TM		 5908}
5909
963d8fe5 5910static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5911{
963d8fe5 5912 struct nfs4_unlockdata *calldata = data;
faf5f49c 5913
14516c3a
TM		 5914 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5915 return;
faf5f49c
TM		 5916 switch (task->tk_status) {
5917 case 0:
26e976a8 5918 renew_lease(calldata->server, calldata->timestamp);
75575ddf 5919 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 5920 if (nfs4_update_lock_stateid(calldata->lsp,
5921 &calldata->res.stateid))
5922 break;
26d36301
TM		 5923 case -NFS4ERR_ADMIN_REVOKED:
5924 case -NFS4ERR_EXPIRED:
5925 nfs4_free_revoked_stateid(calldata->server,
5926 &calldata->arg.stateid,
5927 task->tk_msg.rpc_cred);
9e33bed5
TM		 5928 case -NFS4ERR_BAD_STATEID:
5929 case -NFS4ERR_OLD_STATEID:
faf5f49c 5930 case -NFS4ERR_STALE_STATEID:
425c1d4e
TM		 5931 if (!nfs4_stateid_match(&calldata->arg.stateid,
5932 &calldata->lsp->ls_stateid))
5933 rpc_restart_call_prepare(task);
faf5f49c
TM		 5934 break;
5935 default:
8478eaa1
N		 5936 if (nfs4_async_handle_error(task, calldata->server,
5937 NULL, NULL) == -EAGAIN)
d00c5d43 5938 rpc_restart_call_prepare(task);
faf5f49c 5939 }
2b1bc308 5940 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5941}
5942
4ce70ada 5943static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5944{
4ce70ada 5945 struct nfs4_unlockdata *calldata = data;
faf5f49c 5946
911d1aaf 5947 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5948 goto out_wait;
425c1d4e 5949 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5950 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5951 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5952 goto out_no_action;
faf5f49c 5953 }
26e976a8 5954 calldata->timestamp = jiffies;
035168ab 5955 if (nfs4_setup_sequence(calldata->server,
a893693c 5956 &calldata->arg.seq_args,
2240a9e2
TM		 5957 &calldata->res.seq_res,
5958 task) != 0)
5959 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5960 return;
5961out_no_action:
5962 task->tk_action = NULL;
5963out_wait:
5964 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5965}
5966
963d8fe5 5967static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5968 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5969 .rpc_call_done = nfs4_locku_done,
06f814a3 5970 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5971};
5972
a5d16a4d
TM		 5973static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5974 struct nfs_open_context *ctx,
5975 struct nfs4_lock_state *lsp,
5976 struct nfs_seqid *seqid)
5977{
5978 struct nfs4_unlockdata *data;
5138fde0
TM		 5979 struct rpc_message msg = {
5980 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5981 .rpc_cred = ctx->cred,
5982 };
c970aa85
TM		 5983 struct rpc_task_setup task_setup_data = {
5984 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5985 .rpc_message = &msg,
c970aa85 5986 .callback_ops = &nfs4_locku_ops,
101070ca 5987 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5988 .flags = RPC_TASK_ASYNC,
5989 };
a5d16a4d 5990
fa940720
WAA		 5991 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5992 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5993
137d6aca
FF		 5994 /* Ensure this is an unlock - when canceling a lock, the
5995 * canceled lock is passed in, and it won't be an unlock.
5996 */
5997 fl->fl_type = F_UNLCK;
5998
a5d16a4d
TM		 5999 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
6000 if (data == NULL) {
6001 nfs_free_seqid(seqid);
6002 return ERR_PTR(-ENOMEM);
6003 }
6004
a9c92d6b 6005 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 6006 msg.rpc_argp = &data->arg;
6007 msg.rpc_resp = &data->res;
c970aa85
TM		 6008 task_setup_data.callback_data = data;
6009 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 6010}
6011
faf5f49c
TM		 6012static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
6013{
65b62a29
TM		 6014 struct inode *inode = state->inode;
6015 struct nfs4_state_owner *sp = state->owner;
6016 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 6017 struct nfs_seqid *seqid;
1da177e4 6018 struct nfs4_lock_state *lsp;
06f814a3 6019 struct rpc_task *task;
b4019c0e 6020 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 6021 int status = 0;
536ff0f8 6022 unsigned char fl_flags = request->fl_flags;
faf5f49c 6023
8d0a8a9d 6024 status = nfs4_set_lock_state(state, request);
9b073574
TM		 6025 /* Unlock _before_ we do the RPC call */
6026 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 6027 /* Exclude nfs_delegation_claim_locks() */
6028 mutex_lock(&sp->so_delegreturn_mutex);
6029 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 6030 down_read(&nfsi->rwsem);
75575ddf 6031 if (locks_lock_inode_wait(inode, request) == -ENOENT) {
19e03c57 6032 up_read(&nfsi->rwsem);
65b62a29 6033 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 6034 goto out;
19e03c57
TM		 6035 }
6036 up_read(&nfsi->rwsem);
65b62a29 6037 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 6038 if (status != 0)
9b073574
TM		 6039 goto out;
6040 /* Is this a delegated lock? */
8d0a8a9d 6041 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 6042 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
6043 goto out;
b4019c0e
TM		 6044 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
6045 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 6046 status = -ENOMEM;
badc76dd 6047 if (IS_ERR(seqid))
9b073574 6048 goto out;
cd3758e3 6049 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 6050 status = PTR_ERR(task);
6051 if (IS_ERR(task))
9b073574 6052 goto out;
a5d16a4d 6053 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 6054 rpc_put_task(task);
9b073574 6055out:
536ff0f8 6056 request->fl_flags = fl_flags;
d1b748a5 6057 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 6058 return status;
6059}
6060
a5d16a4d
TM		 6061struct nfs4_lockdata {
6062 struct nfs_lock_args arg;
6063 struct nfs_lock_res res;
6064 struct nfs4_lock_state *lsp;
6065 struct nfs_open_context *ctx;
6066 struct file_lock fl;
26e976a8 6067 unsigned long timestamp;
a5d16a4d
TM		 6068 int rpc_status;
6069 int cancelled;
66179efe 6070 struct nfs_server *server;
a5d16a4d
TM		 6071};
6072
6073static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 6074 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
6075 gfp_t gfp_mask)
1da177e4 6076{
a5d16a4d
TM		 6077 struct nfs4_lockdata *p;
6078 struct inode *inode = lsp->ls_state->inode;
1da177e4 6079 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 6080 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 6081
8535b2be 6082 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 6083 if (p == NULL)
6084 return NULL;
6085
6086 p->arg.fh = NFS_FH(inode);
6087 p->arg.fl = &p->fl;
8535b2be 6088 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 6089 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 6090 goto out_free;
b4019c0e
TM		 6091 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
6092 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 6093 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 6094 goto out_free_seqid;
7539bbab 6095 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 6096 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 6097 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 6098 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 6099 p->lsp = lsp;
66179efe 6100 p->server = server;
a5d16a4d
TM		 6101 atomic_inc(&lsp->ls_count);
6102 p->ctx = get_nfs_open_context(ctx);
feaff8e5 6103 get_file(fl->fl_file);
a5d16a4d
TM		 6104 memcpy(&p->fl, fl, sizeof(p->fl));
6105 return p;
2f74c0a0
TM		 6106out_free_seqid:
6107 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 6108out_free:
6109 kfree(p);
6110 return NULL;
6111}
6112
6113static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
6114{
6115 struct nfs4_lockdata *data = calldata;
6116 struct nfs4_state *state = data->lsp->ls_state;
06735b34 6117
3110ff80 6118 dprintk("%s: begin!\n", __func__);
2f74c0a0 6119 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 6120 goto out_wait;
a5d16a4d 6121 /* Do we need to do an open_to_lock_owner? */
6b447539 6122 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 6123 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 6124 goto out_release_lock_seqid;
8fe72bac 6125 }
425c1d4e
TM		 6126 nfs4_stateid_copy(&data->arg.open_stateid,
6127 &state->open_stateid);
a5d16a4d 6128 data->arg.new_lock_owner = 1;
c1d51931 6129 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 6130 } else {
2f74c0a0 6131 data->arg.new_lock_owner = 0;
425c1d4e
TM		 6132 nfs4_stateid_copy(&data->arg.lock_stateid,
6133 &data->lsp->ls_stateid);
6134 }
5d422301
TM		 6135 if (!nfs4_valid_open_stateid(state)) {
6136 data->rpc_status = -EBADF;
6137 task->tk_action = NULL;
6138 goto out_release_open_seqid;
6139 }
26e976a8 6140 data->timestamp = jiffies;
035168ab
TM		 6141 if (nfs4_setup_sequence(data->server,
6142 &data->arg.seq_args,
2240a9e2 6143 &data->res.seq_res,
d9afbd1b 6144 task) == 0)
66179efe 6145 return;
5d422301 6146out_release_open_seqid:
2240a9e2
TM		 6147 nfs_release_seqid(data->arg.open_seqid);
6148out_release_lock_seqid:
6149 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 6150out_wait:
6151 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 6152 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 6153}
6154
a5d16a4d
TM		 6155static void nfs4_lock_done(struct rpc_task *task, void *calldata)
6156{
6157 struct nfs4_lockdata *data = calldata;
39071e6f 6158 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 6159
3110ff80 6160 dprintk("%s: begin!\n", __func__);
a5d16a4d 6161
14516c3a
TM		 6162 if (!nfs4_sequence_done(task, &data->res.seq_res))
6163 return;
66179efe 6164
a5d16a4d 6165 data->rpc_status = task->tk_status;
425c1d4e
TM		 6166 switch (task->tk_status) {
6167 case 0:
2b0143b5 6168 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 6169 data->timestamp);
c69899a1
TM		 6170 if (data->arg.new_lock) {
6171 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
75575ddf 6172 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) {
c69899a1
TM		 6173 rpc_restart_call_prepare(task);
6174 break;
6175 }
6176 }
39071e6f
TM		 6177 if (data->arg.new_lock_owner != 0) {
6178 nfs_confirm_seqid(&lsp->ls_seqid, 0);
6179 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
6180 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6181 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
6182 rpc_restart_call_prepare(task);
425c1d4e
TM		 6183 break;
6184 case -NFS4ERR_BAD_STATEID:
6185 case -NFS4ERR_OLD_STATEID:
6186 case -NFS4ERR_STALE_STATEID:
6187 case -NFS4ERR_EXPIRED:
6188 if (data->arg.new_lock_owner != 0) {
6189 if (!nfs4_stateid_match(&data->arg.open_stateid,
6190 &lsp->ls_state->open_stateid))
6191 rpc_restart_call_prepare(task);
6192 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
6193 &lsp->ls_stateid))
6194 rpc_restart_call_prepare(task);
a5d16a4d 6195 }
3110ff80 6196 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 6197}
6198
6199static void nfs4_lock_release(void *calldata)
6200{
6201 struct nfs4_lockdata *data = calldata;
6202
3110ff80 6203 dprintk("%s: begin!\n", __func__);
2f74c0a0 6204 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 6205 if (data->cancelled != 0) {
6206 struct rpc_task *task;
6207 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
6208 data->arg.lock_seqid);
6209 if (!IS_ERR(task))
bf294b41 6210 rpc_put_task_async(task);
3110ff80 6211 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 6212 } else
6213 nfs_free_seqid(data->arg.lock_seqid);
6214 nfs4_put_lock_state(data->lsp);
6215 put_nfs_open_context(data->ctx);
feaff8e5 6216 fput(data->fl.fl_file);
a5d16a4d 6217 kfree(data);
3110ff80 6218 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 6219}
6220
6221static const struct rpc_call_ops nfs4_lock_ops = {
6222 .rpc_call_prepare = nfs4_lock_prepare,
6223 .rpc_call_done = nfs4_lock_done,
6224 .rpc_release = nfs4_lock_release,
6225};
6226
2bee72a6
TM		 6227static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
6228{
2bee72a6
TM		 6229 switch (error) {
6230 case -NFS4ERR_ADMIN_REVOKED:
d7f3e4bf 6231 case -NFS4ERR_EXPIRED:
2bee72a6 6232 case -NFS4ERR_BAD_STATEID:
ecac799a 6233 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 6234 if (new_lock_owner != 0 ||
795a88c9 6235 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 6236 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 6237 break;
6238 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 6239 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a 6240 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 6241 };
6242}
6243
afe6c27c 6244static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 6245{
6246 struct nfs4_lockdata *data;
6247 struct rpc_task *task;
5138fde0
TM		 6248 struct rpc_message msg = {
6249 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
6250 .rpc_cred = state->owner->so_cred,
6251 };
c970aa85
TM		 6252 struct rpc_task_setup task_setup_data = {
6253 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 6254 .rpc_message = &msg,
c970aa85 6255 .callback_ops = &nfs4_lock_ops,
101070ca 6256 .workqueue = nfsiod_workqueue,
c970aa85
TM		 6257 .flags = RPC_TASK_ASYNC,
6258 };
a5d16a4d
TM		 6259 int ret;
6260
3110ff80 6261 dprintk("%s: begin!\n", __func__);
cd3758e3 6262 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 6263 fl->fl_u.nfs4_fl.owner,
6264 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 6265 if (data == NULL)
6266 return -ENOMEM;
6267 if (IS_SETLKW(cmd))
6268 data->arg.block = 1;
a9c92d6b 6269 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 6270 msg.rpc_argp = &data->arg;
6271 msg.rpc_resp = &data->res;
c970aa85 6272 task_setup_data.callback_data = data;
8fe72bac
TM		 6273 if (recovery_type > NFS_LOCK_NEW) {
6274 if (recovery_type == NFS_LOCK_RECLAIM)
6275 data->arg.reclaim = NFS_LOCK_RECLAIM;
6276 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 6277 } else
6278 data->arg.new_lock = 1;
c970aa85 6279 task = rpc_run_task(&task_setup_data);
7a1218a2 6280 if (IS_ERR(task))
a5d16a4d 6281 return PTR_ERR(task);
a5d16a4d
TM		 6282 ret = nfs4_wait_for_completion_rpc_task(task);
6283 if (ret == 0) {
6284 ret = data->rpc_status;
2bee72a6
TM		 6285 if (ret)
6286 nfs4_handle_setlk_error(data->server, data->lsp,
6287 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 6288 } else
6289 data->cancelled = 1;
e6b3c4db 6290 rpc_put_task(task);
3110ff80 6291 dprintk("%s: done, ret = %d!\n", __func__, ret);
48c9579a 6292 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
a5d16a4d 6293 return ret;
1da177e4
LT		 6294}
6295
6296static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
6297{
202b50dc 6298 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6299 struct nfs4_exception exception = {
6300 .inode = state->inode,
6301 };
202b50dc
TM		 6302 int err;
6303
6304 do {
42a2d13e
TM		 6305 /* Cache the lock if possible... */
6306 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6307 return 0;
afe6c27c 6308 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 6309 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 6310 break;
6311 nfs4_handle_exception(server, err, &exception);
6312 } while (exception.retry);
6313 return err;
1da177e4
LT		 6314}
6315
6316static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
6317{
202b50dc 6318 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6319 struct nfs4_exception exception = {
6320 .inode = state->inode,
6321 };
202b50dc
TM		 6322 int err;
6323
6bfc93ef
TM		 6324 err = nfs4_set_lock_state(state, request);
6325 if (err != 0)
6326 return err;
f6de7a39 6327 if (!recover_lost_locks) {
ef1820f9
N		 6328 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
6329 return 0;
6330 }
202b50dc 6331 do {
42a2d13e
TM		 6332 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6333 return 0;
afe6c27c 6334 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 6335 switch (err) {
6336 default:
6337 goto out;
6338 case -NFS4ERR_GRACE:
6339 case -NFS4ERR_DELAY:
6340 nfs4_handle_exception(server, err, &exception);
6341 err = 0;
6342 }
202b50dc 6343 } while (exception.retry);
a9ed2e25 6344out:
202b50dc 6345 return err;
1da177e4
LT		 6346}
6347
f062eb6c 6348#if defined(CONFIG_NFS_V4_1)
b01dd1d8
BS		 6349static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6350{
c5896fc8
TM		 6351 struct nfs4_lock_state *lsp;
6352 int status;
b01dd1d8 6353
c5896fc8
TM		 6354 status = nfs4_set_lock_state(state, request);
6355 if (status != 0)
6356 return status;
6357 lsp = request->fl_u.nfs4_fl.owner;
6358 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) ||
6359 test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
6360 return 0;
6361 status = nfs4_lock_expired(state, request);
eb64cf96 6362 return status;
f062eb6c
BS		 6363}
6364#endif
6365
1da177e4
LT		 6366static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6367{
19e03c57 6368 struct nfs_inode *nfsi = NFS_I(state->inode);
11476e9d 6369 struct nfs4_state_owner *sp = state->owner;
01c3b861 6370 unsigned char fl_flags = request->fl_flags;
1ea67dbd 6371 int status;
1da177e4 6372
01c3b861 6373 request->fl_flags |= FL_ACCESS;
75575ddf 6374 status = locks_lock_inode_wait(state->inode, request);
01c3b861
TM		 6375 if (status < 0)
6376 goto out;
11476e9d 6377 mutex_lock(&sp->so_delegreturn_mutex);
19e03c57 6378 down_read(&nfsi->rwsem);
01c3b861 6379 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6380 /* Yes: cache locks! */
01c3b861 6381 /* ...but avoid races with delegation recall... */
19e03c57 6382 request->fl_flags = fl_flags & ~FL_SLEEP;
75575ddf 6383 status = locks_lock_inode_wait(state->inode, request);
c69899a1 6384 up_read(&nfsi->rwsem);
11476e9d 6385 mutex_unlock(&sp->so_delegreturn_mutex);
9a99af49 6386 goto out;
9a99af49 6387 }
19e03c57 6388 up_read(&nfsi->rwsem);
11476e9d 6389 mutex_unlock(&sp->so_delegreturn_mutex);
c69899a1 6390 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6391out:
6392 request->fl_flags = fl_flags;
1da177e4
LT		 6393 return status;
6394}
6395
6396static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6397{
a1d0b5ee
TM		 6398 struct nfs4_exception exception = {
6399 .state = state,
05ffe24f 6400 .inode = state->inode,
a1d0b5ee 6401 };
1da177e4
LT		 6402 int err;
6403
6404 do {
965b5d67
TM		 6405 err = _nfs4_proc_setlk(state, cmd, request);
6406 if (err == -NFS4ERR_DENIED)
6407 err = -EAGAIN;
1da177e4 6408 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6409 err, &exception);
1da177e4
LT		 6410 } while (exception.retry);
6411 return err;
6412}
6413
d2f3a7f9
JL		 6414#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
6415#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
6416
6417static int
a1d617d8
JL		 6418nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd,
6419 struct file_lock *request)
d2f3a7f9
JL		 6420{
6421 int status = -ERESTARTSYS;
6422 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6423
6424 while(!signalled()) {
6425 status = nfs4_proc_setlk(state, cmd, request);
6426 if ((status != -EAGAIN) || IS_SETLK(cmd))
6427 break;
6428 freezable_schedule_timeout_interruptible(timeout);
6429 timeout *= 2;
6430 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout);
6431 status = -ERESTARTSYS;
6432 }
6433 return status;
6434}
6435
a1d617d8
JL		 6436#ifdef CONFIG_NFS_V4_1
6437struct nfs4_lock_waiter {
6438 struct task_struct *task;
6439 struct inode *inode;
6440 struct nfs_lowner *owner;
6441 bool notified;
6442};
6443
6444static int
6445nfs4_wake_lock_waiter(wait_queue_t *wait, unsigned int mode, int flags, void *key)
6446{
6447 int ret;
6448 struct cb_notify_lock_args *cbnl = key;
6449 struct nfs4_lock_waiter *waiter = wait->private;
6450 struct nfs_lowner *lowner = &cbnl->cbnl_owner,
6451 *wowner = waiter->owner;
6452
6453 /* Only wake if the callback was for the same owner */
6454 if (lowner->clientid != wowner->clientid ||
6455 lowner->id != wowner->id ||
6456 lowner->s_dev != wowner->s_dev)
6457 return 0;
6458
6459 /* Make sure it's for the right inode */
6460 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
6461 return 0;
6462
6463 waiter->notified = true;
6464
6465 /* override "private" so we can use default_wake_function */
6466 wait->private = waiter->task;
6467 ret = autoremove_wake_function(wait, mode, flags, key);
6468 wait->private = waiter;
6469 return ret;
6470}
6471
6472static int
6473nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6474{
6475 int status = -ERESTARTSYS;
6476 unsigned long flags;
6477 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
6478 struct nfs_server *server = NFS_SERVER(state->inode);
6479 struct nfs_client *clp = server->nfs_client;
6480 wait_queue_head_t *q = &clp->cl_lock_waitq;
6481 struct nfs_lowner owner = { .clientid = clp->cl_clientid,
6482 .id = lsp->ls_seqid.owner_id,
6483 .s_dev = server->s_dev };
6484 struct nfs4_lock_waiter waiter = { .task = current,
6485 .inode = state->inode,
6486 .owner = &owner,
6487 .notified = false };
6488 wait_queue_t wait;
6489
6490 /* Don't bother with waitqueue if we don't expect a callback */
6491 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags))
6492 return nfs4_retry_setlk_simple(state, cmd, request);
6493
6494 init_wait(&wait);
6495 wait.private = &waiter;
6496 wait.func = nfs4_wake_lock_waiter;
6497 add_wait_queue(q, &wait);
6498
6499 while(!signalled()) {
6500 status = nfs4_proc_setlk(state, cmd, request);
6501 if ((status != -EAGAIN) || IS_SETLK(cmd))
6502 break;
6503
6504 status = -ERESTARTSYS;
6505 spin_lock_irqsave(&q->lock, flags);
6506 if (waiter.notified) {
6507 spin_unlock_irqrestore(&q->lock, flags);
6508 continue;
6509 }
6510 set_current_state(TASK_INTERRUPTIBLE);
6511 spin_unlock_irqrestore(&q->lock, flags);
6512
6513 freezable_schedule_timeout_interruptible(NFS4_LOCK_MAXTIMEOUT);
6514 }
6515
6516 finish_wait(q, &wait);
6517 return status;
6518}
6519#else /* !CONFIG_NFS_V4_1 */
6520static inline int
6521nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6522{
6523 return nfs4_retry_setlk_simple(state, cmd, request);
6524}
6525#endif
6526
1da177e4
LT		 6527static int
6528nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6529{
6530 struct nfs_open_context *ctx;
6531 struct nfs4_state *state;
1da177e4
LT		 6532 int status;
6533
6534 /* verify open state */
cd3758e3 6535 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6536 state = ctx->state;
6537
6538 if (request->fl_start < 0 || request->fl_end < 0)
6539 return -EINVAL;
6540
d953126a
TM		 6541 if (IS_GETLK(cmd)) {
6542 if (state != NULL)
6543 return nfs4_proc_getlk(state, F_GETLK, request);
6544 return 0;
6545 }
1da177e4
LT		 6546
6547 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6548 return -EINVAL;
6549
d953126a
TM		 6550 if (request->fl_type == F_UNLCK) {
6551 if (state != NULL)
6552 return nfs4_proc_unlck(state, cmd, request);
6553 return 0;
6554 }
1da177e4 6555
d953126a
TM		 6556 if (state == NULL)
6557 return -ENOLCK;
1ea67dbd
JL		 6558
6559 if ((request->fl_flags & FL_POSIX) &&
6560 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6561 return -ENOLCK;
6562
55725513
TM		 6563 /*
6564 * Don't rely on the VFS having checked the file open mode,
6565 * since it won't do this for flock() locks.
6566 */
f44106e2 6567 switch (request->fl_type) {
55725513
TM		 6568 case F_RDLCK:
6569 if (!(filp->f_mode & FMODE_READ))
6570 return -EBADF;
6571 break;
6572 case F_WRLCK:
6573 if (!(filp->f_mode & FMODE_WRITE))
6574 return -EBADF;
6575 }
6576
1ea67dbd
JL		 6577 status = nfs4_set_lock_state(state, request);
6578 if (status != 0)
6579 return status;
6580
d2f3a7f9 6581 return nfs4_retry_setlk(state, cmd, request);
1da177e4
LT		 6582}
6583
db4f2e63 6584int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6585{
6586 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6587 int err;
6588
6589 err = nfs4_set_lock_state(state, fl);
6590 if (err != 0)
db4f2e63 6591 return err;
4a706fa0 6592 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6593 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6594}
6b3b5496 6595
cf470c3e
TM		 6596struct nfs_release_lockowner_data {
6597 struct nfs4_lock_state *lsp;
5ae67c4f 6598 struct nfs_server *server;
cf470c3e 6599 struct nfs_release_lockowner_args args;
b7e63a10 6600 struct nfs_release_lockowner_res res;
60ea6812 6601 unsigned long timestamp;
cf470c3e
TM		 6602};
6603
fbd4bfd1
CL		 6604static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6605{
6606 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6607 struct nfs_server *server = data->server;
cb04ad2a
PT		 6608 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6609 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6610 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6611 data->timestamp = jiffies;
fbd4bfd1
CL		 6612}
6613
6614static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6615{
6616 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6617 struct nfs_server *server = data->server;
6618
b7e63a10 6619 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6620
6621 switch (task->tk_status) {
6622 case 0:
6623 renew_lease(server, data->timestamp);
6624 break;
6625 case -NFS4ERR_STALE_CLIENTID:
6626 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6627 nfs4_schedule_lease_recovery(server->nfs_client);
6628 break;
60ea6812
CL		 6629 case -NFS4ERR_LEASE_MOVED:
6630 case -NFS4ERR_DELAY:
8478eaa1
N		 6631 if (nfs4_async_handle_error(task, server,
6632 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6633 rpc_restart_call_prepare(task);
6634 }
fbd4bfd1
CL		 6635}
6636
d3c7b7cc
TM		 6637static void nfs4_release_lockowner_release(void *calldata)
6638{
cf470c3e 6639 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6640 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6641 kfree(calldata);
6642}
6643
17280175 6644static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6645 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6646 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6647 .rpc_release = nfs4_release_lockowner_release,
6648};
6649
f1cdae87
JL		 6650static void
6651nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6652{
cf470c3e 6653 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6654 struct rpc_message msg = {
6655 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6656 };
6657
6658 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6659 return;
fbd4bfd1 6660
cf470c3e
TM		 6661 data = kmalloc(sizeof(*data), GFP_NOFS);
6662 if (!data)
f1cdae87 6663 return;
cf470c3e 6664 data->lsp = lsp;
5ae67c4f 6665 data->server = server;
cf470c3e
TM		 6666 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6667 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6668 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6669
cf470c3e 6670 msg.rpc_argp = &data->args;
b7e63a10
TM		 6671 msg.rpc_resp = &data->res;
6672 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6673 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6674}
6675
aa1870af
BF		 6676#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6677
d9a82a04 6678static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
59301226
AV		 6679 struct dentry *unused, struct inode *inode,
6680 const char *key, const void *buf,
6681 size_t buflen, int flags)
6b3b5496 6682{
59301226 6683 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 6684}
6685
d9a82a04 6686static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
b296821a
AV		 6687 struct dentry *unused, struct inode *inode,
6688 const char *key, void *buf, size_t buflen)
6b3b5496 6689{
b296821a 6690 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 6691}
6692
764a5c6b 6693static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6b3b5496 6694{
764a5c6b 6695 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6b3b5496
BF		 6696}
6697
c9bccef6 6698#ifdef CONFIG_NFS_V4_SECURITY_LABEL
c9bccef6 6699
d9a82a04 6700static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
59301226
AV		 6701 struct dentry *unused, struct inode *inode,
6702 const char *key, const void *buf,
6703 size_t buflen, int flags)
c9bccef6
DQ		 6704{
6705 if (security_ismaclabel(key))
59301226 6706 return nfs4_set_security_label(inode, buf, buflen);
c9bccef6
DQ		 6707
6708 return -EOPNOTSUPP;
6709}
6710
d9a82a04 6711static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
b296821a
AV		 6712 struct dentry *unused, struct inode *inode,
6713 const char *key, void *buf, size_t buflen)
c9bccef6
DQ		 6714{
6715 if (security_ismaclabel(key))
b296821a 6716 return nfs4_get_security_label(inode, buf, buflen);
c9bccef6
DQ		 6717 return -EOPNOTSUPP;
6718}
6719
c4803c49
AG		 6720static ssize_t
6721nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
c9bccef6 6722{
c4803c49 6723 int len = 0;
c9bccef6 6724
c4803c49
AG		 6725 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
6726 len = security_inode_listsecurity(inode, list, list_len);
6727 if (list_len && len > list_len)
6728 return -ERANGE;
c9bccef6
DQ		 6729 }
6730 return len;
6731}
6732
6733static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6734 .prefix = XATTR_SECURITY_PREFIX,
c9bccef6
DQ		 6735 .get = nfs4_xattr_get_nfs4_label,
6736 .set = nfs4_xattr_set_nfs4_label,
6737};
c9bccef6 6738
c4803c49
AG		 6739#else
6740
6741static ssize_t
6742nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6743{
6744 return 0;
6745}
6746
6747#endif
c9bccef6 6748
533eb461
AA		 6749/*
6750 * nfs_fhget will use either the mounted_on_fileid or the fileid
6751 */
69aaaae1
TM		 6752static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6753{
533eb461
AA		 6754 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6755 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6756 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6757 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6758 return;
6759
6760 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6761 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6762 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6763 fattr->nlink = 2;
6764}
6765
f05d147f
BS		 6766static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6767 const struct qstr *name,
6768 struct nfs4_fs_locations *fs_locations,
6769 struct page *page)
683b57b4
TM		 6770{
6771 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6772 u32 bitmask[3] = {
361e624f 6773 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6774 };
6775 struct nfs4_fs_locations_arg args = {
6776 .dir_fh = NFS_FH(dir),
c228fd3a 6777 .name = name,
683b57b4
TM		 6778 .page = page,
6779 .bitmask = bitmask,
6780 };
22958463
BH		 6781 struct nfs4_fs_locations_res res = {
6782 .fs_locations = fs_locations,
6783 };
683b57b4
TM		 6784 struct rpc_message msg = {
6785 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6786 .rpc_argp = &args,
22958463 6787 .rpc_resp = &res,
683b57b4
TM		 6788 };
6789 int status;
6790
3110ff80 6791 dprintk("%s: start\n", __func__);
533eb461
AA		 6792
6793 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6794 * is not supported */
6795 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6796 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6797 else
6798 bitmask[0] |= FATTR4_WORD0_FILEID;
6799
c228fd3a 6800 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6801 fs_locations->server = server;
830b8e33 6802 fs_locations->nlocations = 0;
f05d147f 6803 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6804 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6805 return status;
6806}
6807
f05d147f
BS		 6808int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6809 const struct qstr *name,
6810 struct nfs4_fs_locations *fs_locations,
6811 struct page *page)
db0a9593
BS		 6812{
6813 struct nfs4_exception exception = { };
6814 int err;
6815 do {
078ea3df
TM		 6816 err = _nfs4_proc_fs_locations(client, dir, name,
6817 fs_locations, page);
6818 trace_nfs4_get_fs_locations(dir, name, err);
6819 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6820 &exception);
6821 } while (exception.retry);
6822 return err;
6823}
6824
b03d735b
CL		 6825/*
6826 * This operation also signals the server that this client is
6827 * performing migration recovery. The server can stop returning
6828 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6829 * appended to this compound to identify the client ID which is
6830 * performing recovery.
6831 */
6832static int _nfs40_proc_get_locations(struct inode *inode,
6833 struct nfs4_fs_locations *locations,
6834 struct page *page, struct rpc_cred *cred)
6835{
6836 struct nfs_server *server = NFS_SERVER(inode);
6837 struct rpc_clnt *clnt = server->client;
6838 u32 bitmask[2] = {
6839 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6840 };
6841 struct nfs4_fs_locations_arg args = {
6842 .clientid = server->nfs_client->cl_clientid,
6843 .fh = NFS_FH(inode),
6844 .page = page,
6845 .bitmask = bitmask,
6846 .migration = 1, /* skip LOOKUP */
6847 .renew = 1, /* append RENEW */
6848 };
6849 struct nfs4_fs_locations_res res = {
6850 .fs_locations = locations,
6851 .migration = 1,
6852 .renew = 1,
6853 };
6854 struct rpc_message msg = {
6855 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6856 .rpc_argp = &args,
6857 .rpc_resp = &res,
6858 .rpc_cred = cred,
6859 };
6860 unsigned long now = jiffies;
6861 int status;
6862
6863 nfs_fattr_init(&locations->fattr);
6864 locations->server = server;
6865 locations->nlocations = 0;
6866
6867 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6868 nfs4_set_sequence_privileged(&args.seq_args);
6869 status = nfs4_call_sync_sequence(clnt, server, &msg,
6870 &args.seq_args, &res.seq_res);
6871 if (status)
6872 return status;
6873
6874 renew_lease(server, now);
6875 return 0;
6876}
6877
6878#ifdef CONFIG_NFS_V4_1
6879
6880/*
6881 * This operation also signals the server that this client is
6882 * performing migration recovery. The server can stop asserting
6883 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6884 * performing this operation is identified in the SEQUENCE
6885 * operation in this compound.
6886 *
6887 * When the client supports GETATTR(fs_locations_info), it can
6888 * be plumbed in here.
6889 */
6890static int _nfs41_proc_get_locations(struct inode *inode,
6891 struct nfs4_fs_locations *locations,
6892 struct page *page, struct rpc_cred *cred)
6893{
6894 struct nfs_server *server = NFS_SERVER(inode);
6895 struct rpc_clnt *clnt = server->client;
6896 u32 bitmask[2] = {
6897 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6898 };
6899 struct nfs4_fs_locations_arg args = {
6900 .fh = NFS_FH(inode),
6901 .page = page,
6902 .bitmask = bitmask,
6903 .migration = 1, /* skip LOOKUP */
6904 };
6905 struct nfs4_fs_locations_res res = {
6906 .fs_locations = locations,
6907 .migration = 1,
6908 };
6909 struct rpc_message msg = {
6910 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6911 .rpc_argp = &args,
6912 .rpc_resp = &res,
6913 .rpc_cred = cred,
6914 };
6915 int status;
6916
6917 nfs_fattr_init(&locations->fattr);
6918 locations->server = server;
6919 locations->nlocations = 0;
6920
6921 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6922 nfs4_set_sequence_privileged(&args.seq_args);
6923 status = nfs4_call_sync_sequence(clnt, server, &msg,
6924 &args.seq_args, &res.seq_res);
6925 if (status == NFS4_OK &&
6926 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6927 status = -NFS4ERR_LEASE_MOVED;
6928 return status;
6929}
6930
6931#endif /* CONFIG_NFS_V4_1 */
6932
6933/**
6934 * nfs4_proc_get_locations - discover locations for a migrated FSID
6935 * @inode: inode on FSID that is migrating
6936 * @locations: result of query
6937 * @page: buffer
6938 * @cred: credential to use for this operation
6939 *
6940 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6941 * operation failed, or a negative errno if a local error occurred.
6942 *
6943 * On success, "locations" is filled in, but if the server has
6944 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6945 * asserted.
6946 *
6947 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6948 * from this client that require migration recovery.
6949 */
6950int nfs4_proc_get_locations(struct inode *inode,
6951 struct nfs4_fs_locations *locations,
6952 struct page *page, struct rpc_cred *cred)
6953{
6954 struct nfs_server *server = NFS_SERVER(inode);
6955 struct nfs_client *clp = server->nfs_client;
6956 const struct nfs4_mig_recovery_ops *ops =
6957 clp->cl_mvops->mig_recovery_ops;
6958 struct nfs4_exception exception = { };
6959 int status;
6960
6961 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6962 (unsigned long long)server->fsid.major,
6963 (unsigned long long)server->fsid.minor,
6964 clp->cl_hostname);
6965 nfs_display_fhandle(NFS_FH(inode), __func__);
6966
6967 do {
6968 status = ops->get_locations(inode, locations, page, cred);
6969 if (status != -NFS4ERR_DELAY)
6970 break;
6971 nfs4_handle_exception(server, status, &exception);
6972 } while (exception.retry);
6973 return status;
6974}
6975
44c99933
CL		 6976/*
6977 * This operation also signals the server that this client is
6978 * performing "lease moved" recovery. The server can stop
6979 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6980 * is appended to this compound to identify the client ID which is
6981 * performing recovery.
6982 */
6983static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6984{
6985 struct nfs_server *server = NFS_SERVER(inode);
6986 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6987 struct rpc_clnt *clnt = server->client;
6988 struct nfs4_fsid_present_arg args = {
6989 .fh = NFS_FH(inode),
6990 .clientid = clp->cl_clientid,
6991 .renew = 1, /* append RENEW */
6992 };
6993 struct nfs4_fsid_present_res res = {
6994 .renew = 1,
6995 };
6996 struct rpc_message msg = {
6997 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6998 .rpc_argp = &args,
6999 .rpc_resp = &res,
7000 .rpc_cred = cred,
7001 };
7002 unsigned long now = jiffies;
7003 int status;
7004
7005 res.fh = nfs_alloc_fhandle();
7006 if (res.fh == NULL)
7007 return -ENOMEM;
7008
7009 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
7010 nfs4_set_sequence_privileged(&args.seq_args);
7011 status = nfs4_call_sync_sequence(clnt, server, &msg,
7012 &args.seq_args, &res.seq_res);
7013 nfs_free_fhandle(res.fh);
7014 if (status)
7015 return status;
7016
7017 do_renew_lease(clp, now);
7018 return 0;
7019}
7020
7021#ifdef CONFIG_NFS_V4_1
7022
7023/*
7024 * This operation also signals the server that this client is
7025 * performing "lease moved" recovery. The server can stop asserting
7026 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
7027 * this operation is identified in the SEQUENCE operation in this
7028 * compound.
7029 */
7030static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7031{
7032 struct nfs_server *server = NFS_SERVER(inode);
7033 struct rpc_clnt *clnt = server->client;
7034 struct nfs4_fsid_present_arg args = {
7035 .fh = NFS_FH(inode),
7036 };
7037 struct nfs4_fsid_present_res res = {
7038 };
7039 struct rpc_message msg = {
7040 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
7041 .rpc_argp = &args,
7042 .rpc_resp = &res,
7043 .rpc_cred = cred,
7044 };
7045 int status;
7046
7047 res.fh = nfs_alloc_fhandle();
7048 if (res.fh == NULL)
7049 return -ENOMEM;
7050
7051 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
7052 nfs4_set_sequence_privileged(&args.seq_args);
7053 status = nfs4_call_sync_sequence(clnt, server, &msg,
7054 &args.seq_args, &res.seq_res);
7055 nfs_free_fhandle(res.fh);
7056 if (status == NFS4_OK &&
7057 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
7058 status = -NFS4ERR_LEASE_MOVED;
7059 return status;
7060}
7061
7062#endif /* CONFIG_NFS_V4_1 */
7063
7064/**
7065 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
7066 * @inode: inode on FSID to check
7067 * @cred: credential to use for this operation
7068 *
7069 * Server indicates whether the FSID is present, moved, or not
7070 * recognized. This operation is necessary to clear a LEASE_MOVED
7071 * condition for this client ID.
7072 *
7073 * Returns NFS4_OK if the FSID is present on this server,
7074 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
7075 * NFS4ERR code if some error occurred on the server, or a
7076 * negative errno if a local failure occurred.
7077 */
7078int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7079{
7080 struct nfs_server *server = NFS_SERVER(inode);
7081 struct nfs_client *clp = server->nfs_client;
7082 const struct nfs4_mig_recovery_ops *ops =
7083 clp->cl_mvops->mig_recovery_ops;
7084 struct nfs4_exception exception = { };
7085 int status;
7086
7087 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
7088 (unsigned long long)server->fsid.major,
7089 (unsigned long long)server->fsid.minor,
7090 clp->cl_hostname);
7091 nfs_display_fhandle(NFS_FH(inode), __func__);
7092
7093 do {
7094 status = ops->fsid_present(inode, cred);
7095 if (status != -NFS4ERR_DELAY)
7096 break;
7097 nfs4_handle_exception(server, status, &exception);
7098 } while (exception.retry);
7099 return status;
7100}
7101
5ec16a85 7102/**
a5250def
WAA		 7103 * If 'use_integrity' is true and the state managment nfs_client
7104 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
7105 * and the machine credential as per RFC3530bis and RFC5661 Security
7106 * Considerations sections. Otherwise, just use the user cred with the
7107 * filesystem's rpc_client.
5ec16a85 7108 */
a5250def 7109static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 7110{
7111 int status;
7112 struct nfs4_secinfo_arg args = {
7113 .dir_fh = NFS_FH(dir),
7114 .name = name,
7115 };
7116 struct nfs4_secinfo_res res = {
7117 .flavors = flavors,
7118 };
7119 struct rpc_message msg = {
7120 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
7121 .rpc_argp = &args,
7122 .rpc_resp = &res,
7123 };
a5250def 7124 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 7125 struct rpc_cred *cred = NULL;
a5250def
WAA		 7126
7127 if (use_integrity) {
7128 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 7129 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
7130 msg.rpc_cred = cred;
a5250def 7131 }
5a5ea0d4
BS		 7132
7133 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 7134
7135 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
7136 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
7137
a5250def
WAA		 7138 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
7139 &res.seq_res, 0);
5a5ea0d4 7140 dprintk("NFS reply secinfo: %d\n", status);
a5250def 7141
7cb852df
WAA		 7142 if (cred)
7143 put_rpccred(cred);
a5250def 7144
5a5ea0d4
BS		 7145 return status;
7146}
7147
72de53ec
BS		 7148int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
7149 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 7150{
7151 struct nfs4_exception exception = { };
7152 int err;
7153 do {
a5250def
WAA		 7154 err = -NFS4ERR_WRONGSEC;
7155
7156 /* try to use integrity protection with machine cred */
7157 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
7158 err = _nfs4_proc_secinfo(dir, name, flavors, true);
7159
7160 /*
7161 * if unable to use integrity protection, or SECINFO with
7162 * integrity protection returns NFS4ERR_WRONGSEC (which is
7163 * disallowed by spec, but exists in deployed servers) use
7164 * the current filesystem's rpc_client and the user cred.
7165 */
7166 if (err == -NFS4ERR_WRONGSEC)
7167 err = _nfs4_proc_secinfo(dir, name, flavors, false);
7168
078ea3df
TM		 7169 trace_nfs4_secinfo(dir, name, err);
7170 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 7171 &exception);
7172 } while (exception.retry);
7173 return err;
7174}
7175
557134a3 7176#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 7177/*
7178 * Check the exchange flags returned by the server for invalid flags, having
7179 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
7180 * DS flags set.
7181 */
7182static int nfs4_check_cl_exchange_flags(u32 flags)
7183{
7184 if (flags & ~EXCHGID4_FLAG_MASK_R)
7185 goto out_inval;
7186 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
7187 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
7188 goto out_inval;
7189 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
7190 goto out_inval;
7191 return NFS_OK;
7192out_inval:
7193 return -NFS4ERR_INVAL;
7194}
7195
78fe0f41 7196static bool
79d4e1f0
CL		 7197nfs41_same_server_scope(struct nfs41_server_scope *a,
7198 struct nfs41_server_scope *b)
78fe0f41
WAA		 7199{
7200 if (a->server_scope_sz == b->server_scope_sz &&
7201 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
7202 return true;
7203
7204 return false;
7205}
7206
02a95dee
AA		 7207static void
7208nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
7209{
7210}
7211
7212static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
7213 .rpc_call_done = &nfs4_bind_one_conn_to_session_done,
7214};
7215
7c44f1ae 7216/*
d9ddbf5d 7217 * nfs4_proc_bind_one_conn_to_session()
7c44f1ae
WAA		 7218 *
7219 * The 4.1 client currently uses the same TCP connection for the
7220 * fore and backchannel.
7221 */
d9ddbf5d
TM		 7222static
7223int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
7224 struct rpc_xprt *xprt,
7225 struct nfs_client *clp,
7226 struct rpc_cred *cred)
7c44f1ae
WAA		 7227{
7228 int status;
71a097c6
TM		 7229 struct nfs41_bind_conn_to_session_args args = {
7230 .client = clp,
7231 .dir = NFS4_CDFC4_FORE_OR_BOTH,
7232 };
7c44f1ae
WAA		 7233 struct nfs41_bind_conn_to_session_res res;
7234 struct rpc_message msg = {
7235 .rpc_proc =
7236 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 7237 .rpc_argp = &args,
7c44f1ae 7238 .rpc_resp = &res,
2cf047c9 7239 .rpc_cred = cred,
7c44f1ae 7240 };
d9ddbf5d
TM		 7241 struct rpc_task_setup task_setup_data = {
7242 .rpc_client = clnt,
7243 .rpc_xprt = xprt,
02a95dee 7244 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
d9ddbf5d
TM		 7245 .rpc_message = &msg,
7246 .flags = RPC_TASK_TIMEOUT,
7247 };
7248 struct rpc_task *task;
7c44f1ae
WAA		 7249
7250 dprintk("--> %s\n", __func__);
7c44f1ae 7251
71a097c6
TM		 7252 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
7253 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
7254 args.dir = NFS4_CDFC4_FORE;
7c44f1ae 7255
d9ddbf5d
TM		 7256 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
7257 if (xprt != rcu_access_pointer(clnt->cl_xprt))
7258 args.dir = NFS4_CDFC4_FORE;
7259
7260 task = rpc_run_task(&task_setup_data);
7261 if (!IS_ERR(task)) {
7262 status = task->tk_status;
7263 rpc_put_task(task);
7264 } else
7265 status = PTR_ERR(task);
c6d01c6f 7266 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 7267 if (status == 0) {
71a097c6 7268 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 7269 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
7270 dprintk("NFS: %s: Session ID mismatch\n", __func__);
7271 status = -EIO;
71a097c6 7272 goto out;
7c44f1ae 7273 }
71a097c6 7274 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 7275 dprintk("NFS: %s: Unexpected direction from server\n",
7276 __func__);
7277 status = -EIO;
71a097c6 7278 goto out;
7c44f1ae 7279 }
71a097c6 7280 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 7281 dprintk("NFS: %s: Server returned RDMA mode = true\n",
7282 __func__);
7283 status = -EIO;
71a097c6 7284 goto out;
7c44f1ae
WAA		 7285 }
7286 }
7c44f1ae
WAA		 7287out:
7288 dprintk("<-- %s status= %d\n", __func__, status);
7289 return status;
7290}
7291
d9ddbf5d
TM		 7292struct rpc_bind_conn_calldata {
7293 struct nfs_client *clp;
7294 struct rpc_cred *cred;
7295};
7296
7297static int
7298nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
7299 struct rpc_xprt *xprt,
7300 void *calldata)
7301{
7302 struct rpc_bind_conn_calldata *p = calldata;
7303
7304 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
7305}
7306
7307int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7308{
7309 struct rpc_bind_conn_calldata data = {
7310 .clp = clp,
7311 .cred = cred,
7312 };
7313 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
7314 nfs4_proc_bind_conn_to_session_callback, &data);
7315}
7316
99fe60d0 7317/*
fa940720
WAA		 7318 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
7319 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 7320 */
7321static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
7322 .how = SP4_MACH_CRED,
7323 .enforce.u.words = {
7324 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7325 1 << (OP_EXCHANGE_ID - 32) |
7326 1 << (OP_CREATE_SESSION - 32) |
7327 1 << (OP_DESTROY_SESSION - 32) |
7328 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 7329 },
7330 .allow.u.words = {
7331 [0] = 1 << (OP_CLOSE) |
99ade3c7 7332 1 << (OP_OPEN_DOWNGRADE) |
a0279625 7333 1 << (OP_LOCKU) |
99ade3c7 7334 1 << (OP_DELEGRETURN) |
a0279625 7335 1 << (OP_COMMIT),
8b5bee2e 7336 [1] = 1 << (OP_SECINFO - 32) |
3787d506 7337 1 << (OP_SECINFO_NO_NAME - 32) |
99ade3c7 7338 1 << (OP_LAYOUTRETURN - 32) |
3787d506 7339 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 7340 1 << (OP_FREE_STATEID - 32) |
7341 1 << (OP_WRITE - 32)
2031cd1a
WAA		 7342 }
7343};
7344
7345/*
7346 * Select the state protection mode for client `clp' given the server results
7347 * from exchange_id in `sp'.
99fe60d0 7348 *
2031cd1a
WAA		 7349 * Returns 0 on success, negative errno otherwise.
7350 */
7351static int nfs4_sp4_select_mode(struct nfs_client *clp,
7352 struct nfs41_state_protection *sp)
7353{
7354 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
7355 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7356 1 << (OP_EXCHANGE_ID - 32) |
7357 1 << (OP_CREATE_SESSION - 32) |
7358 1 << (OP_DESTROY_SESSION - 32) |
7359 1 << (OP_DESTROY_CLIENTID - 32)
7360 };
7361 unsigned int i;
7362
7363 if (sp->how == SP4_MACH_CRED) {
7364 /* Print state protect result */
7365 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
7366 for (i = 0; i <= LAST_NFS4_OP; i++) {
7367 if (test_bit(i, sp->enforce.u.longs))
7368 dfprintk(MOUNT, " enforce op %d\n", i);
7369 if (test_bit(i, sp->allow.u.longs))
7370 dfprintk(MOUNT, " allow op %d\n", i);
7371 }
7372
7373 /* make sure nothing is on enforce list that isn't supported */
7374 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
7375 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
7376 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7377 return -EINVAL;
7378 }
7379 }
7380
7381 /*
7382 * Minimal mode - state operations are allowed to use machine
7383 * credential. Note this already happens by default, so the
7384 * client doesn't have to do anything more than the negotiation.
7385 *
7386 * NOTE: we don't care if EXCHANGE_ID is in the list -
7387 * we're already using the machine cred for exchange_id
7388 * and will never use a different cred.
7389 */
7390 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
7391 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
7392 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
7393 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
7394 dfprintk(MOUNT, "sp4_mach_cred:\n");
7395 dfprintk(MOUNT, " minimal mode enabled\n");
7396 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
7397 } else {
7398 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7399 return -EINVAL;
7400 }
fa940720
WAA		 7401
7402 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
99ade3c7
AE		 7403 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
7404 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
fa940720
WAA		 7405 test_bit(OP_LOCKU, sp->allow.u.longs)) {
7406 dfprintk(MOUNT, " cleanup mode enabled\n");
7407 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
7408 }
8b5bee2e 7409
99ade3c7
AE		 7410 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
7411 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
7412 set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP,
7413 &clp->cl_sp4_flags);
7414 }
7415
8b5bee2e
WAA		 7416 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
7417 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
7418 dfprintk(MOUNT, " secinfo mode enabled\n");
7419 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
7420 }
3787d506
WAA		 7421
7422 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
7423 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
7424 dfprintk(MOUNT, " stateid mode enabled\n");
7425 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
7426 }
8c21c62c
WAA		 7427
7428 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
7429 dfprintk(MOUNT, " write mode enabled\n");
7430 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
7431 }
7432
7433 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
7434 dfprintk(MOUNT, " commit mode enabled\n");
7435 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
7436 }
2031cd1a
WAA		 7437 }
7438
7439 return 0;
7440}
7441
8d89bd70
AA		 7442struct nfs41_exchange_id_data {
7443 struct nfs41_exchange_id_res res;
7444 struct nfs41_exchange_id_args args;
ad0849a7 7445 struct rpc_xprt *xprt;
8d89bd70
AA		 7446 int rpc_status;
7447};
7448
7449static void nfs4_exchange_id_done(struct rpc_task *task, void *data)
7450{
7451 struct nfs41_exchange_id_data *cdata =
7452 (struct nfs41_exchange_id_data *)data;
7453 struct nfs_client *clp = cdata->args.client;
7454 int status = task->tk_status;
7455
7456 trace_nfs4_exchange_id(clp, status);
7457
7458 if (status == 0)
7459 status = nfs4_check_cl_exchange_flags(cdata->res.flags);
ad0849a7
AA		 7460
7461 if (cdata->xprt && status == 0) {
7462 status = nfs4_detect_session_trunking(clp, &cdata->res,
7463 cdata->xprt);
7464 goto out;
7465 }
7466
8d89bd70
AA		 7467 if (status == 0)
7468 status = nfs4_sp4_select_mode(clp, &cdata->res.state_protect);
7469
7470 if (status == 0) {
7471 clp->cl_clientid = cdata->res.clientid;
7472 clp->cl_exchange_flags = cdata->res.flags;
7473 /* Client ID is not confirmed */
7474 if (!(cdata->res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7475 clear_bit(NFS4_SESSION_ESTABLISHED,
7476 &clp->cl_session->session_state);
7477 clp->cl_seqid = cdata->res.seqid;
7478 }
7479
7480 kfree(clp->cl_serverowner);
7481 clp->cl_serverowner = cdata->res.server_owner;
7482 cdata->res.server_owner = NULL;
7483
7484 /* use the most recent implementation id */
7485 kfree(clp->cl_implid);
7486 clp->cl_implid = cdata->res.impl_id;
7487 cdata->res.impl_id = NULL;
7488
7489 if (clp->cl_serverscope != NULL &&
7490 !nfs41_same_server_scope(clp->cl_serverscope,
7491 cdata->res.server_scope)) {
7492 dprintk("%s: server_scope mismatch detected\n",
7493 __func__);
7494 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
7495 kfree(clp->cl_serverscope);
7496 clp->cl_serverscope = NULL;
7497 }
7498
7499 if (clp->cl_serverscope == NULL) {
7500 clp->cl_serverscope = cdata->res.server_scope;
7501 cdata->res.server_scope = NULL;
7502 }
ad0849a7
AA		 7503 /* Save the EXCHANGE_ID verifier session trunk tests */
7504 memcpy(clp->cl_confirm.data, cdata->args.verifier->data,
7505 sizeof(clp->cl_confirm.data));
8d89bd70 7506 }
ad0849a7 7507out:
8d89bd70 7508 cdata->rpc_status = status;
ad0849a7 7509 return;
8d89bd70
AA		 7510}
7511
7512static void nfs4_exchange_id_release(void *data)
7513{
7514 struct nfs41_exchange_id_data *cdata =
7515 (struct nfs41_exchange_id_data *)data;
7516
7517 nfs_put_client(cdata->args.client);
ad0849a7
AA		 7518 if (cdata->xprt) {
7519 xprt_put(cdata->xprt);
7520 rpc_clnt_xprt_switch_put(cdata->args.client->cl_rpcclient);
7521 }
8d89bd70
AA		 7522 kfree(cdata->res.impl_id);
7523 kfree(cdata->res.server_scope);
7524 kfree(cdata->res.server_owner);
7525 kfree(cdata);
7526}
7527
7528static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
7529 .rpc_call_done = nfs4_exchange_id_done,
7530 .rpc_release = nfs4_exchange_id_release,
7531};
7532
2031cd1a
WAA		 7533/*
7534 * _nfs4_proc_exchange_id()
6bbb4ae8 7535 *
2031cd1a 7536 * Wrapper for EXCHANGE_ID operation.
99fe60d0 7537 */
2031cd1a 7538static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
ad0849a7 7539 u32 sp4_how, struct rpc_xprt *xprt)
99fe60d0
BH		 7540{
7541 nfs4_verifier verifier;
99fe60d0
BH		 7542 struct rpc_message msg = {
7543 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
99fe60d0
BH		 7544 .rpc_cred = cred,
7545 };
8d89bd70
AA		 7546 struct rpc_task_setup task_setup_data = {
7547 .rpc_client = clp->cl_rpcclient,
7548 .callback_ops = &nfs4_exchange_id_call_ops,
7549 .rpc_message = &msg,
7550 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
7551 };
7552 struct nfs41_exchange_id_data *calldata;
7553 struct rpc_task *task;
7554 int status = -EIO;
7555
7556 if (!atomic_inc_not_zero(&clp->cl_count))
7557 goto out;
7558
7559 status = -ENOMEM;
7560 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7561 if (!calldata)
7562 goto out;
99fe60d0 7563
ad0849a7
AA		 7564 if (!xprt)
7565 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 7566
7567 status = nfs4_init_uniform_client_string(clp);
7568 if (status)
8d89bd70 7569 goto out_calldata;
3a6bb738
JL		 7570
7571 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6bbb4ae8 7572 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 7573 clp->cl_owner_id);
99fe60d0 7574
8d89bd70
AA		 7575 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
7576 GFP_NOFS);
7577 status = -ENOMEM;
7578 if (unlikely(calldata->res.server_owner == NULL))
7579 goto out_calldata;
78fe0f41 7580
8d89bd70 7581 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 7582 GFP_NOFS);
8d89bd70 7583 if (unlikely(calldata->res.server_scope == NULL))
acdeb69d 7584 goto out_server_owner;
78fe0f41 7585
8d89bd70
AA		 7586 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
7587 if (unlikely(calldata->res.impl_id == NULL))
7d2ed9ac 7588 goto out_server_scope;
7d2ed9ac 7589
2031cd1a
WAA		 7590 switch (sp4_how) {
7591 case SP4_NONE:
8d89bd70 7592 calldata->args.state_protect.how = SP4_NONE;
2031cd1a
WAA		 7593 break;
7594
7595 case SP4_MACH_CRED:
8d89bd70 7596 calldata->args.state_protect = nfs4_sp4_mach_cred_request;
2031cd1a
WAA		 7597 break;
7598
7599 default:
7600 /* unsupported! */
7601 WARN_ON_ONCE(1);
7602 status = -EINVAL;
6b55970b 7603 goto out_impl_id;
2031cd1a 7604 }
ad0849a7
AA		 7605 if (xprt) {
7606 calldata->xprt = xprt;
7607 task_setup_data.rpc_xprt = xprt;
7608 task_setup_data.flags =
7609 RPC_TASK_SOFT|RPC_TASK_SOFTCONN|RPC_TASK_ASYNC;
7610 calldata->args.verifier = &clp->cl_confirm;
7611 } else {
7612 calldata->args.verifier = &verifier;
7613 }
8d89bd70
AA		 7614 calldata->args.client = clp;
7615#ifdef CONFIG_NFS_V4_1_MIGRATION
7616 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7617 EXCHGID4_FLAG_BIND_PRINC_STATEID |
7618 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
7619#else
7620 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7621 EXCHGID4_FLAG_BIND_PRINC_STATEID,
7622#endif
7623 msg.rpc_argp = &calldata->args;
7624 msg.rpc_resp = &calldata->res;
7625 task_setup_data.callback_data = calldata;
2031cd1a 7626
8d89bd70
AA		 7627 task = rpc_run_task(&task_setup_data);
7628 if (IS_ERR(task)) {
7629 status = PTR_ERR(task);
7630 goto out_impl_id;
6b55970b 7631 }
7d2ed9ac 7632
ad0849a7
AA		 7633 if (!xprt) {
7634 status = rpc_wait_for_completion_task(task);
7635 if (!status)
7636 status = calldata->rpc_status;
7637 } else /* session trunking test */
8d89bd70 7638 status = calldata->rpc_status;
ad0849a7 7639
8d89bd70 7640 rpc_put_task(task);
abe9a6d5 7641out:
177313f1 7642 if (clp->cl_implid != NULL)
6bbb4ae8 7643 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 7644 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 7645 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 7646 clp->cl_implid->date.seconds,
7647 clp->cl_implid->date.nseconds);
6bbb4ae8 7648 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0 7649 return status;
8d89bd70
AA		 7650
7651out_impl_id:
7652 kfree(calldata->res.impl_id);
7653out_server_scope:
7654 kfree(calldata->res.server_scope);
7655out_server_owner:
7656 kfree(calldata->res.server_owner);
7657out_calldata:
7658 kfree(calldata);
7659 goto out;
99fe60d0
BH		 7660}
7661
2031cd1a
WAA		 7662/*
7663 * nfs4_proc_exchange_id()
7664 *
7665 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7666 *
7667 * Since the clientid has expired, all compounds using sessions
7668 * associated with the stale clientid will be returning
7669 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7670 * be in some phase of session reset.
7671 *
7672 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7673 */
7674int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7675{
7676 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7677 int status;
7678
7679 /* try SP4_MACH_CRED if krb5i/p */
7680 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7681 authflavor == RPC_AUTH_GSS_KRB5P) {
ad0849a7 7682 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED, NULL);
2031cd1a
WAA		 7683 if (!status)
7684 return 0;
7685 }
7686
7687 /* try SP4_NONE */
ad0849a7 7688 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE, NULL);
2031cd1a
WAA		 7689}
7690
04fa2c6b
AA		 7691/**
7692 * nfs4_test_session_trunk
7693 *
7694 * This is an add_xprt_test() test function called from
7695 * rpc_clnt_setup_test_and_add_xprt.
7696 *
7697 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt
7698 * and is dereferrenced in nfs4_exchange_id_release
7699 *
7700 * Upon success, add the new transport to the rpc_clnt
7701 *
7702 * @clnt: struct rpc_clnt to get new transport
7703 * @xprt: the rpc_xprt to test
7704 * @data: call data for _nfs4_proc_exchange_id.
7705 */
7706int nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
7707 void *data)
7708{
7709 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data;
7710 u32 sp4_how;
7711
7712 dprintk("--> %s try %s\n", __func__,
7713 xprt->address_strings[RPC_DISPLAY_ADDR]);
7714
7715 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED);
7716
7717 /* Test connection for session trunking. Async exchange_id call */
7718 return _nfs4_proc_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
2031cd1a 7719}
04fa2c6b 7720EXPORT_SYMBOL_GPL(nfs4_test_session_trunk);
2031cd1a 7721
66245539
TM		 7722static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7723 struct rpc_cred *cred)
7724{
7725 struct rpc_message msg = {
7726 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7727 .rpc_argp = clp,
7728 .rpc_cred = cred,
7729 };
7730 int status;
7731
7732 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7733 trace_nfs4_destroy_clientid(clp, status);
66245539 7734 if (status)
02c67525 7735 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7736 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7737 return status;
7738}
7739
7740static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7741 struct rpc_cred *cred)
7742{
7743 unsigned int loop;
7744 int ret;
7745
7746 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7747 ret = _nfs4_proc_destroy_clientid(clp, cred);
7748 switch (ret) {
7749 case -NFS4ERR_DELAY:
7750 case -NFS4ERR_CLIENTID_BUSY:
7751 ssleep(1);
7752 break;
7753 default:
7754 return ret;
7755 }
7756 }
7757 return 0;
7758}
7759
7760int nfs4_destroy_clientid(struct nfs_client *clp)
7761{
7762 struct rpc_cred *cred;
7763 int ret = 0;
7764
7765 if (clp->cl_mvops->minor_version < 1)
7766 goto out;
7767 if (clp->cl_exchange_flags == 0)
7768 goto out;
05f4c350
CL		 7769 if (clp->cl_preserve_clid)
7770 goto out;
73d8bde5 7771 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7772 ret = nfs4_proc_destroy_clientid(clp, cred);
7773 if (cred)
7774 put_rpccred(cred);
7775 switch (ret) {
7776 case 0:
7777 case -NFS4ERR_STALE_CLIENTID:
7778 clp->cl_exchange_flags = 0;
7779 }
7780out:
7781 return ret;
7782}
7783
2050f0cc
AA		 7784struct nfs4_get_lease_time_data {
7785 struct nfs4_get_lease_time_args *args;
7786 struct nfs4_get_lease_time_res *res;
7787 struct nfs_client *clp;
7788};
7789
7790static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7791 void *calldata)
7792{
2050f0cc
AA		 7793 struct nfs4_get_lease_time_data *data =
7794 (struct nfs4_get_lease_time_data *)calldata;
7795
7796 dprintk("--> %s\n", __func__);
7797 /* just setup sequence, do not trigger session recovery
7798 since we're invoked within one */
d9afbd1b
TM		 7799 nfs41_setup_sequence(data->clp->cl_session,
7800 &data->args->la_seq_args,
7801 &data->res->lr_seq_res,
7802 task);
2050f0cc
AA		 7803 dprintk("<-- %s\n", __func__);
7804}
7805
7806/*
7807 * Called from nfs4_state_manager thread for session setup, so don't recover
7808 * from sequence operation or clientid errors.
7809 */
7810static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7811{
7812 struct nfs4_get_lease_time_data *data =
7813 (struct nfs4_get_lease_time_data *)calldata;
7814
7815 dprintk("--> %s\n", __func__);
14516c3a
TM		 7816 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7817 return;
2050f0cc
AA		 7818 switch (task->tk_status) {
7819 case -NFS4ERR_DELAY:
7820 case -NFS4ERR_GRACE:
7821 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7822 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7823 task->tk_status = 0;
a8a4ae3a
AA		 7824 /* fall through */
7825 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7826 rpc_restart_call_prepare(task);
2050f0cc
AA		 7827 return;
7828 }
2050f0cc
AA		 7829 dprintk("<-- %s\n", __func__);
7830}
7831
17280175 7832static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7833 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7834 .rpc_call_done = nfs4_get_lease_time_done,
7835};
7836
7837int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7838{
7839 struct rpc_task *task;
7840 struct nfs4_get_lease_time_args args;
7841 struct nfs4_get_lease_time_res res = {
7842 .lr_fsinfo = fsinfo,
7843 };
7844 struct nfs4_get_lease_time_data data = {
7845 .args = &args,
7846 .res = &res,
7847 .clp = clp,
7848 };
7849 struct rpc_message msg = {
7850 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7851 .rpc_argp = &args,
7852 .rpc_resp = &res,
7853 };
7854 struct rpc_task_setup task_setup = {
7855 .rpc_client = clp->cl_rpcclient,
7856 .rpc_message = &msg,
7857 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7858 .callback_data = &data,
7859 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7860 };
7861 int status;
7862
a9c92d6b 7863 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7864 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7865 dprintk("--> %s\n", __func__);
7866 task = rpc_run_task(&task_setup);
7867
7868 if (IS_ERR(task))
7869 status = PTR_ERR(task);
7870 else {
7871 status = task->tk_status;
7872 rpc_put_task(task);
7873 }
7874 dprintk("<-- %s return %d\n", __func__, status);
7875
7876 return status;
7877}
7878
fc931582
AA		 7879/*
7880 * Initialize the values to be used by the client in CREATE_SESSION
7881 * If nfs4_init_session set the fore channel request and response sizes,
7882 * use them.
7883 *
7884 * Set the back channel max_resp_sz_cached to zero to force the client to
7885 * always set csa_cachethis to FALSE because the current implementation
7886 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7887 */
6b26cc8c
CL		 7888static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
7889 struct rpc_clnt *clnt)
fc931582 7890{
18aad3d5 7891 unsigned int max_rqst_sz, max_resp_sz;
6b26cc8c 7892 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
18aad3d5
AA		 7893
7894 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7895 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7896
fc931582 7897 /* Fore channel attributes */
18aad3d5
AA		 7898 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7899 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7900 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7901 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7902
7903 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7904 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7905 __func__,
7906 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7907 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7908
7909 /* Back channel attributes */
6b26cc8c
CL		 7910 args->bc_attrs.max_rqst_sz = max_bc_payload;
7911 args->bc_attrs.max_resp_sz = max_bc_payload;
fc931582
AA		 7912 args->bc_attrs.max_resp_sz_cached = 0;
7913 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5405fc44 7914 args->bc_attrs.max_reqs = min_t(unsigned short, max_session_cb_slots, 1);
fc931582
AA		 7915
7916 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7917 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7918 __func__,
7919 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7920 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7921 args->bc_attrs.max_reqs);
7922}
7923
79969dd1
TM		 7924static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7925 struct nfs41_create_session_res *res)
8d35301d 7926{
43c2e885 7927 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7928 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7929
43c2e885
BF		 7930 if (rcvd->max_resp_sz > sent->max_resp_sz)
7931 return -EINVAL;
7932 /*
7933 * Our requested max_ops is the minimum we need; we're not
7934 * prepared to break up compounds into smaller pieces than that.
7935 * So, no point even trying to continue if the server won't
7936 * cooperate:
7937 */
7938 if (rcvd->max_ops < sent->max_ops)
7939 return -EINVAL;
7940 if (rcvd->max_reqs == 0)
7941 return -EINVAL;
b4b9a0c1
VG		 7942 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7943 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7944 return 0;
8d35301d
AA		 7945}
7946
79969dd1
TM		 7947static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7948 struct nfs41_create_session_res *res)
43c2e885
BF		 7949{
7950 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7951 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7952
b1c0df5f
TM		 7953 if (!(res->flags & SESSION4_BACK_CHAN))
7954 goto out;
43c2e885
BF		 7955 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7956 return -EINVAL;
7957 if (rcvd->max_resp_sz < sent->max_resp_sz)
7958 return -EINVAL;
7959 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7960 return -EINVAL;
5405fc44 7961 if (rcvd->max_ops > sent->max_ops)
43c2e885 7962 return -EINVAL;
5405fc44 7963 if (rcvd->max_reqs > sent->max_reqs)
43c2e885 7964 return -EINVAL;
b1c0df5f 7965out:
43c2e885
BF		 7966 return 0;
7967}
8d35301d 7968
8d35301d 7969static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7970 struct nfs41_create_session_res *res)
8d35301d 7971{
43c2e885 7972 int ret;
8d35301d 7973
79969dd1 7974 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7975 if (ret)
7976 return ret;
79969dd1
TM		 7977 return nfs4_verify_back_channel_attrs(args, res);
7978}
7979
7980static void nfs4_update_session(struct nfs4_session *session,
7981 struct nfs41_create_session_res *res)
7982{
7983 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7984 /* Mark client id and session as being confirmed */
7985 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7986 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7987 session->flags = res->flags;
7988 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7989 if (res->flags & SESSION4_BACK_CHAN)
7990 memcpy(&session->bc_attrs, &res->bc_attrs,
7991 sizeof(session->bc_attrs));
8d35301d
AA		 7992}
7993
848f5bda
TM		 7994static int _nfs4_proc_create_session(struct nfs_client *clp,
7995 struct rpc_cred *cred)
fc931582
AA		 7996{
7997 struct nfs4_session *session = clp->cl_session;
7998 struct nfs41_create_session_args args = {
7999 .client = clp,
79969dd1
TM		 8000 .clientid = clp->cl_clientid,
8001 .seqid = clp->cl_seqid,
fc931582
AA		 8002 .cb_program = NFS4_CALLBACK,
8003 };
79969dd1
TM		 8004 struct nfs41_create_session_res res;
8005
fc931582
AA		 8006 struct rpc_message msg = {
8007 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
8008 .rpc_argp = &args,
8009 .rpc_resp = &res,
848f5bda 8010 .rpc_cred = cred,
fc931582
AA		 8011 };
8012 int status;
8013
6b26cc8c 8014 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
0f91421e 8015 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 8016
1bd714f2 8017 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 8018 trace_nfs4_create_session(clp, status);
fc931582 8019
b519d408
TM		 8020 switch (status) {
8021 case -NFS4ERR_STALE_CLIENTID:
8022 case -NFS4ERR_DELAY:
8023 case -ETIMEDOUT:
8024 case -EACCES:
8025 case -EAGAIN:
8026 goto out;
8027 };
8028
8029 clp->cl_seqid++;
43095d39 8030 if (!status) {
8d35301d 8031 /* Verify the session's negotiated channel_attrs values */
79969dd1 8032 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 8033 /* Increment the clientid slot sequence id */
79969dd1
TM		 8034 if (status)
8035 goto out;
8036 nfs4_update_session(session, &res);
fc931582 8037 }
79969dd1 8038out:
fc931582
AA		 8039 return status;
8040}
8041
8042/*
8043 * Issues a CREATE_SESSION operation to the server.
8044 * It is the responsibility of the caller to verify the session is
8045 * expired before calling this routine.
8046 */
848f5bda 8047int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 8048{
8049 int status;
8050 unsigned *ptr;
fc931582
AA		 8051 struct nfs4_session *session = clp->cl_session;
8052
8053 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
8054
848f5bda 8055 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 8056 if (status)
8057 goto out;
8058
aacd5537
AA		 8059 /* Init or reset the session slot tables */
8060 status = nfs4_setup_session_slot_tables(session);
8061 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 8062 if (status)
8063 goto out;
8064
8065 ptr = (unsigned *)&session->sess_id.data[0];
8066 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
8067 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 8068out:
8069 dprintk("<-- %s\n", __func__);
8070 return status;
8071}
8072
0f3e66c6
AA		 8073/*
8074 * Issue the over-the-wire RPC DESTROY_SESSION.
8075 * The caller must serialize access to this routine.
8076 */
848f5bda
TM		 8077int nfs4_proc_destroy_session(struct nfs4_session *session,
8078 struct rpc_cred *cred)
0f3e66c6 8079{
848f5bda
TM		 8080 struct rpc_message msg = {
8081 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
8082 .rpc_argp = session,
8083 .rpc_cred = cred,
8084 };
0f3e66c6 8085 int status = 0;
0f3e66c6
AA		 8086
8087 dprintk("--> nfs4_proc_destroy_session\n");
8088
8089 /* session is still being setup */
e11259f9
TM		 8090 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
8091 return 0;
0f3e66c6 8092
1bd714f2 8093 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 8094 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 8095
8096 if (status)
08106ac7 8097 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 8098 "Session has been destroyed regardless...\n", status);
8099
8100 dprintk("<-- nfs4_proc_destroy_session\n");
8101 return status;
8102}
8103
fc01cea9
AA		 8104/*
8105 * Renew the cl_session lease.
8106 */
d5f8d3fe
TM		 8107struct nfs4_sequence_data {
8108 struct nfs_client *clp;
8109 struct nfs4_sequence_args args;
8110 struct nfs4_sequence_res res;
8111};
8112
dc96aef9
AB		 8113static void nfs41_sequence_release(void *data)
8114{
d5f8d3fe
TM		 8115 struct nfs4_sequence_data *calldata = data;
8116 struct nfs_client *clp = calldata->clp;
dc96aef9 8117
7135840f
AB		 8118 if (atomic_read(&clp->cl_count) > 1)
8119 nfs4_schedule_state_renewal(clp);
8120 nfs_put_client(clp);
d5f8d3fe 8121 kfree(calldata);
dc96aef9
AB		 8122}
8123
aa5190d0
TM		 8124static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8125{
8126 switch(task->tk_status) {
8127 case -NFS4ERR_DELAY:
aa5190d0
TM		 8128 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8129 return -EAGAIN;
8130 default:
0400a6b0 8131 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 8132 }
8133 return 0;
8134}
8135
dc96aef9 8136static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 8137{
d5f8d3fe
TM		 8138 struct nfs4_sequence_data *calldata = data;
8139 struct nfs_client *clp = calldata->clp;
fc01cea9 8140
14516c3a
TM		 8141 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
8142 return;
fc01cea9 8143
c6d01c6f 8144 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 8145 if (task->tk_status < 0) {
8146 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 8147 if (atomic_read(&clp->cl_count) == 1)
8148 goto out;
fc01cea9 8149
aa5190d0
TM		 8150 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
8151 rpc_restart_call_prepare(task);
fc01cea9
AA		 8152 return;
8153 }
8154 }
fc01cea9 8155 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 8156out:
fc01cea9
AA		 8157 dprintk("<-- %s\n", __func__);
8158}
8159
8160static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
8161{
d5f8d3fe
TM		 8162 struct nfs4_sequence_data *calldata = data;
8163 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 8164 struct nfs4_sequence_args *args;
8165 struct nfs4_sequence_res *res;
8166
fc01cea9
AA		 8167 args = task->tk_msg.rpc_argp;
8168 res = task->tk_msg.rpc_resp;
8169
d9afbd1b 8170 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 8171}
8172
8173static const struct rpc_call_ops nfs41_sequence_ops = {
8174 .rpc_call_done = nfs41_sequence_call_done,
8175 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 8176 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 8177};
8178
8fe72bac
TM		 8179static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
8180 struct rpc_cred *cred,
8181 bool is_privileged)
fc01cea9 8182{
d5f8d3fe 8183 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 8184 struct rpc_message msg = {
8185 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
8186 .rpc_cred = cred,
8187 };
71ac6da9
TM		 8188 struct rpc_task_setup task_setup_data = {
8189 .rpc_client = clp->cl_rpcclient,
8190 .rpc_message = &msg,
8fe72bac 8191 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 8192 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 8193 };
fc01cea9 8194
7135840f 8195 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 8196 return ERR_PTR(-EIO);
dfb4f309 8197 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 8198 if (calldata == NULL) {
7135840f 8199 nfs_put_client(clp);
71ac6da9 8200 return ERR_PTR(-ENOMEM);
fc01cea9 8201 }
a9c92d6b 8202 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 8203 if (is_privileged)
8204 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 8205 msg.rpc_argp = &calldata->args;
8206 msg.rpc_resp = &calldata->res;
8207 calldata->clp = clp;
71ac6da9 8208 task_setup_data.callback_data = calldata;
fc01cea9 8209
71ac6da9
TM		 8210 return rpc_run_task(&task_setup_data);
8211}
8212
2f60ea6b 8213static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 8214{
8215 struct rpc_task *task;
8216 int ret = 0;
8217
2f60ea6b 8218 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 8219 return -EAGAIN;
8fe72bac 8220 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 8221 if (IS_ERR(task))
8222 ret = PTR_ERR(task);
8223 else
bf294b41 8224 rpc_put_task_async(task);
71ac6da9
TM		 8225 dprintk("<-- %s status=%d\n", __func__, ret);
8226 return ret;
8227}
8228
8229static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
8230{
8231 struct rpc_task *task;
8232 int ret;
8233
8fe72bac 8234 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 8235 if (IS_ERR(task)) {
8236 ret = PTR_ERR(task);
8237 goto out;
8238 }
8239 ret = rpc_wait_for_completion_task(task);
be824167 8240 if (!ret)
71ac6da9
TM		 8241 ret = task->tk_status;
8242 rpc_put_task(task);
8243out:
8244 dprintk("<-- %s status=%d\n", __func__, ret);
8245 return ret;
fc01cea9
AA		 8246}
8247
fce5c838
RL		 8248struct nfs4_reclaim_complete_data {
8249 struct nfs_client *clp;
8250 struct nfs41_reclaim_complete_args arg;
8251 struct nfs41_reclaim_complete_res res;
8252};
8253
8254static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
8255{
8256 struct nfs4_reclaim_complete_data *calldata = data;
8257
d9afbd1b
TM		 8258 nfs41_setup_sequence(calldata->clp->cl_session,
8259 &calldata->arg.seq_args,
8260 &calldata->res.seq_res,
8261 task);
fce5c838
RL		 8262}
8263
aa5190d0
TM		 8264static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8265{
8266 switch(task->tk_status) {
8267 case 0:
8268 case -NFS4ERR_COMPLETE_ALREADY:
8269 case -NFS4ERR_WRONG_CRED: /* What to do here? */
8270 break;
8271 case -NFS4ERR_DELAY:
aa5190d0 8272 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 8273 /* fall through */
8274 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 8275 return -EAGAIN;
8276 default:
0400a6b0 8277 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 8278 }
8279 return 0;
8280}
8281
fce5c838
RL		 8282static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
8283{
8284 struct nfs4_reclaim_complete_data *calldata = data;
8285 struct nfs_client *clp = calldata->clp;
8286 struct nfs4_sequence_res *res = &calldata->res.seq_res;
8287
8288 dprintk("--> %s\n", __func__);
14516c3a
TM		 8289 if (!nfs41_sequence_done(task, res))
8290 return;
fce5c838 8291
c6d01c6f 8292 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 8293 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
8294 rpc_restart_call_prepare(task);
8295 return;
8296 }
fce5c838
RL		 8297 dprintk("<-- %s\n", __func__);
8298}
8299
8300static void nfs4_free_reclaim_complete_data(void *data)
8301{
8302 struct nfs4_reclaim_complete_data *calldata = data;
8303
8304 kfree(calldata);
8305}
8306
8307static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
8308 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
8309 .rpc_call_done = nfs4_reclaim_complete_done,
8310 .rpc_release = nfs4_free_reclaim_complete_data,
8311};
8312
8313/*
8314 * Issue a global reclaim complete.
8315 */
965e9c23
TM		 8316static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
8317 struct rpc_cred *cred)
fce5c838
RL		 8318{
8319 struct nfs4_reclaim_complete_data *calldata;
8320 struct rpc_task *task;
8321 struct rpc_message msg = {
8322 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 8323 .rpc_cred = cred,
fce5c838
RL		 8324 };
8325 struct rpc_task_setup task_setup_data = {
8326 .rpc_client = clp->cl_rpcclient,
8327 .rpc_message = &msg,
8328 .callback_ops = &nfs4_reclaim_complete_call_ops,
8329 .flags = RPC_TASK_ASYNC,
8330 };
8331 int status = -ENOMEM;
8332
8333 dprintk("--> %s\n", __func__);
8535b2be 8334 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 8335 if (calldata == NULL)
8336 goto out;
8337 calldata->clp = clp;
8338 calldata->arg.one_fs = 0;
fce5c838 8339
a9c92d6b 8340 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 8341 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 8342 msg.rpc_argp = &calldata->arg;
8343 msg.rpc_resp = &calldata->res;
8344 task_setup_data.callback_data = calldata;
8345 task = rpc_run_task(&task_setup_data);
acf82b85 8346 if (IS_ERR(task)) {
fce5c838 8347 status = PTR_ERR(task);
acf82b85
DC		 8348 goto out;
8349 }
c34c32ea
AA		 8350 status = nfs4_wait_for_completion_rpc_task(task);
8351 if (status == 0)
8352 status = task->tk_status;
fce5c838 8353 rpc_put_task(task);
acf82b85 8354 return 0;
fce5c838
RL		 8355out:
8356 dprintk("<-- %s status=%d\n", __func__, status);
8357 return status;
8358}
b1f69b75
AA		 8359
8360static void
8361nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
8362{
8363 struct nfs4_layoutget *lgp = calldata;
c31663d4 8364 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 8365 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 8366
8367 dprintk("--> %s\n", __func__);
183d9e7b
JL		 8368 nfs41_setup_sequence(session, &lgp->args.seq_args,
8369 &lgp->res.seq_res, task);
8370 dprintk("<-- %s\n", __func__);
b1f69b75
AA		 8371}
8372
8373static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
8374{
8375 struct nfs4_layoutget *lgp = calldata;
183d9e7b
JL		 8376
8377 dprintk("--> %s\n", __func__);
2e80dbe7 8378 nfs41_sequence_process(task, &lgp->res.seq_res);
183d9e7b
JL		 8379 dprintk("<-- %s\n", __func__);
8380}
8381
8382static int
8383nfs4_layoutget_handle_exception(struct rpc_task *task,
8384 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
8385{
ee314c2a
TM		 8386 struct inode *inode = lgp->args.inode;
8387 struct nfs_server *server = NFS_SERVER(inode);
8388 struct pnfs_layout_hdr *lo;
e85d7ee4
TM		 8389 int nfs4err = task->tk_status;
8390 int err, status = 0;
f7db0b28 8391 LIST_HEAD(head);
b1f69b75 8392
ed7e5423 8393 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 8394
e85d7ee4 8395 switch (nfs4err) {
b1f69b75 8396 case 0:
ee314c2a 8397 goto out;
7c1e6e58
PT		 8398
8399 /*
8400 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
8401 * on the file. set tk_status to -ENODATA to tell upper layer to
8402 * retry go inband.
8403 */
8404 case -NFS4ERR_LAYOUTUNAVAILABLE:
183d9e7b 8405 status = -ENODATA;
7c1e6e58 8406 goto out;
21b874c8
TM		 8407 /*
8408 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
8409 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
8410 */
8411 case -NFS4ERR_BADLAYOUT:
183d9e7b
JL		 8412 status = -EOVERFLOW;
8413 goto out;
ed7e5423
BH		 8414 /*
8415 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
21b874c8
TM		 8416 * (or clients) writing to the same RAID stripe except when
8417 * the minlength argument is 0 (see RFC5661 section 18.43.3).
183d9e7b
JL		 8418 *
8419 * Treat it like we would RECALLCONFLICT -- we retry for a little
8420 * while, and then eventually give up.
ed7e5423 8421 */
b1f69b75 8422 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b
JL		 8423 if (lgp->args.minlength == 0) {
8424 status = -EOVERFLOW;
8425 goto out;
ed7e5423 8426 }
e85d7ee4
TM		 8427 status = -EBUSY;
8428 break;
183d9e7b 8429 case -NFS4ERR_RECALLCONFLICT:
183d9e7b 8430 status = -ERECALLCONFLICT;
e85d7ee4 8431 break;
26f47443
TM		 8432 case -NFS4ERR_DELEG_REVOKED:
8433 case -NFS4ERR_ADMIN_REVOKED:
ee314c2a
TM		 8434 case -NFS4ERR_EXPIRED:
8435 case -NFS4ERR_BAD_STATEID:
183d9e7b 8436 exception->timeout = 0;
ee314c2a 8437 spin_lock(&inode->i_lock);
f7db0b28
TM		 8438 lo = NFS_I(inode)->layout;
8439 /* If the open stateid was bad, then recover it. */
8440 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
8441 nfs4_stateid_match_other(&lgp->args.stateid,
2259f960 8442 &lgp->args.ctx->state->stateid)) {
ee314c2a 8443 spin_unlock(&inode->i_lock);
183d9e7b 8444 exception->state = lgp->args.ctx->state;
26f47443 8445 exception->stateid = &lgp->args.stateid;
2259f960
TM		 8446 break;
8447 }
f7db0b28
TM		 8448
8449 /*
8450 * Mark the bad layout state as invalid, then retry
8451 */
668f455d 8452 pnfs_mark_layout_stateid_invalid(lo, &head);
f7db0b28
TM		 8453 spin_unlock(&inode->i_lock);
8454 pnfs_free_lseg_list(&head);
8455 status = -EAGAIN;
8456 goto out;
b1f69b75 8457 }
183d9e7b 8458
e85d7ee4
TM		 8459 err = nfs4_handle_exception(server, nfs4err, exception);
8460 if (!status) {
8461 if (exception->retry)
8462 status = -EAGAIN;
8463 else
8464 status = err;
8465 }
ee314c2a 8466out:
b1f69b75 8467 dprintk("<-- %s\n", __func__);
183d9e7b 8468 return status;
b1f69b75
AA		 8469}
8470
8554116e
IK		 8471static size_t max_response_pages(struct nfs_server *server)
8472{
8473 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
8474 return nfs_page_array_len(0, max_resp_sz);
8475}
8476
8477static void nfs4_free_pages(struct page **pages, size_t size)
8478{
8479 int i;
8480
8481 if (!pages)
8482 return;
8483
8484 for (i = 0; i < size; i++) {
8485 if (!pages[i])
8486 break;
8487 __free_page(pages[i]);
8488 }
8489 kfree(pages);
8490}
8491
8492static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
8493{
8494 struct page **pages;
8495 int i;
8496
8497 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
8498 if (!pages) {
8499 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
8500 return NULL;
8501 }
8502
8503 for (i = 0; i < size; i++) {
8504 pages[i] = alloc_page(gfp_flags);
8505 if (!pages[i]) {
8506 dprintk("%s: failed to allocate page\n", __func__);
8507 nfs4_free_pages(pages, size);
8508 return NULL;
8509 }
8510 }
8511
8512 return pages;
8513}
8514
b1f69b75
AA		 8515static void nfs4_layoutget_release(void *calldata)
8516{
8517 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 8518 struct inode *inode = lgp->args.inode;
8519 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8520 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8521
8522 dprintk("--> %s\n", __func__);
8554116e 8523 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 8524 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 8525 put_nfs_open_context(lgp->args.ctx);
8526 kfree(calldata);
8527 dprintk("<-- %s\n", __func__);
8528}
8529
8530static const struct rpc_call_ops nfs4_layoutget_call_ops = {
8531 .rpc_call_prepare = nfs4_layoutget_prepare,
8532 .rpc_call_done = nfs4_layoutget_done,
8533 .rpc_release = nfs4_layoutget_release,
8534};
8535
a0b0a6e3 8536struct pnfs_layout_segment *
183d9e7b 8537nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags)
b1f69b75 8538{
a47970ff
WAA		 8539 struct inode *inode = lgp->args.inode;
8540 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8541 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8542 struct rpc_task *task;
8543 struct rpc_message msg = {
8544 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
8545 .rpc_argp = &lgp->args,
8546 .rpc_resp = &lgp->res,
6ab59344 8547 .rpc_cred = lgp->cred,
b1f69b75
AA		 8548 };
8549 struct rpc_task_setup task_setup_data = {
8550 .rpc_client = server->client,
8551 .rpc_message = &msg,
8552 .callback_ops = &nfs4_layoutget_call_ops,
8553 .callback_data = lgp,
8554 .flags = RPC_TASK_ASYNC,
8555 };
a0b0a6e3 8556 struct pnfs_layout_segment *lseg = NULL;
bc23676c
TM		 8557 struct nfs4_exception exception = {
8558 .inode = inode,
8559 .timeout = *timeout,
8560 };
b1f69b75
AA		 8561 int status = 0;
8562
8563 dprintk("--> %s\n", __func__);
8564
4bd5a980
PT		 8565 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
8566 pnfs_get_layout_hdr(NFS_I(inode)->layout);
8567
8554116e
IK		 8568 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
8569 if (!lgp->args.layout.pages) {
8570 nfs4_layoutget_release(lgp);
a0b0a6e3 8571 return ERR_PTR(-ENOMEM);
8554116e
IK		 8572 }
8573 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
8574
35124a09 8575 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 8576 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 8577 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 8578
b1f69b75
AA		 8579 task = rpc_run_task(&task_setup_data);
8580 if (IS_ERR(task))
a0b0a6e3 8581 return ERR_CAST(task);
b1f69b75 8582 status = nfs4_wait_for_completion_rpc_task(task);
183d9e7b
JL		 8583 if (status == 0) {
8584 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
8585 *timeout = exception.timeout;
8586 }
8587
1037e6ea
TM		 8588 trace_nfs4_layoutget(lgp->args.ctx,
8589 &lgp->args.range,
8590 &lgp->res.range,
48c9579a 8591 &lgp->res.stateid,
1037e6ea 8592 status);
183d9e7b 8593
085b7a45
WAA		 8594 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8595 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 8596 lseg = pnfs_layout_process(lgp);
2e80dbe7 8597 nfs4_sequence_free_slot(&lgp->res.seq_res);
b1f69b75
AA		 8598 rpc_put_task(task);
8599 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 8600 if (status)
8601 return ERR_PTR(status);
8602 return lseg;
b1f69b75
AA		 8603}
8604
cbe82603
BH		 8605static void
8606nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8607{
8608 struct nfs4_layoutreturn *lrp = calldata;
8609
8610 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 8611 nfs41_setup_sequence(lrp->clp->cl_session,
8612 &lrp->args.seq_args,
8613 &lrp->res.seq_res,
8614 task);
cbe82603
BH		 8615}
8616
8617static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8618{
8619 struct nfs4_layoutreturn *lrp = calldata;
8620 struct nfs_server *server;
8621
8622 dprintk("--> %s\n", __func__);
8623
2e80dbe7 8624 if (!nfs41_sequence_process(task, &lrp->res.seq_res))
cbe82603
BH		 8625 return;
8626
8627 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 8628 switch (task->tk_status) {
8629 default:
8630 task->tk_status = 0;
8631 case 0:
8632 break;
8633 case -NFS4ERR_DELAY:
8478eaa1 8634 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 8635 break;
2e80dbe7 8636 nfs4_sequence_free_slot(&lrp->res.seq_res);
d00c5d43 8637 rpc_restart_call_prepare(task);
cbe82603
BH		 8638 return;
8639 }
cbe82603
BH		 8640 dprintk("<-- %s\n", __func__);
8641}
8642
8643static void nfs4_layoutreturn_release(void *calldata)
8644{
8645 struct nfs4_layoutreturn *lrp = calldata;
849b286f 8646 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 8647
8648 dprintk("--> %s\n", __func__);
2a974425 8649 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range,
68f74479 8650 lrp->res.lrs_present ? &lrp->res.stateid : NULL);
2e80dbe7 8651 nfs4_sequence_free_slot(&lrp->res.seq_res);
4d796d75
TM		 8652 if (lrp->ld_private.ops && lrp->ld_private.ops->free)
8653 lrp->ld_private.ops->free(&lrp->ld_private);
2f065ddb
TM		 8654 pnfs_put_layout_hdr(lrp->args.layout);
8655 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 8656 kfree(calldata);
8657 dprintk("<-- %s\n", __func__);
8658}
8659
8660static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8661 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8662 .rpc_call_done = nfs4_layoutreturn_done,
8663 .rpc_release = nfs4_layoutreturn_release,
8664};
8665
6c16605d 8666int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 8667{
8668 struct rpc_task *task;
8669 struct rpc_message msg = {
8670 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8671 .rpc_argp = &lrp->args,
8672 .rpc_resp = &lrp->res,
9556000d 8673 .rpc_cred = lrp->cred,
cbe82603
BH		 8674 };
8675 struct rpc_task_setup task_setup_data = {
1771c577 8676 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8677 .rpc_message = &msg,
8678 .callback_ops = &nfs4_layoutreturn_call_ops,
8679 .callback_data = lrp,
8680 };
6c16605d 8681 int status = 0;
cbe82603 8682
99ade3c7
AE		 8683 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
8684 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
8685 &task_setup_data.rpc_client, &msg);
8686
cbe82603 8687 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8688 if (!sync) {
8689 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8690 if (!lrp->inode) {
8691 nfs4_layoutreturn_release(lrp);
8692 return -EAGAIN;
8693 }
8694 task_setup_data.flags |= RPC_TASK_ASYNC;
8695 }
a9c92d6b 8696 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8697 task = rpc_run_task(&task_setup_data);
8698 if (IS_ERR(task))
8699 return PTR_ERR(task);
5a0ec8ac
TM		 8700 if (sync)
8701 status = task->tk_status;
48c9579a 8702 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
cbe82603
BH		 8703 dprintk("<-- %s status=%d\n", __func__, status);
8704 rpc_put_task(task);
8705 return status;
8706}
8707
b1f69b75 8708static int
cd5875fe
TM		 8709_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8710 struct pnfs_device *pdev,
8711 struct rpc_cred *cred)
b1f69b75
AA		 8712{
8713 struct nfs4_getdeviceinfo_args args = {
8714 .pdev = pdev,
4e590803
TM		 8715 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8716 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8717 };
8718 struct nfs4_getdeviceinfo_res res = {
8719 .pdev = pdev,
8720 };
8721 struct rpc_message msg = {
8722 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8723 .rpc_argp = &args,
8724 .rpc_resp = &res,
cd5875fe 8725 .rpc_cred = cred,
b1f69b75
AA		 8726 };
8727 int status;
8728
8729 dprintk("--> %s\n", __func__);
7c513058 8730 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8731 if (res.notification & ~args.notify_types)
8732 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8733 if (res.notification != args.notify_types)
8734 pdev->nocache = 1;
4e590803 8735
b1f69b75
AA		 8736 dprintk("<-- %s status=%d\n", __func__, status);
8737
8738 return status;
8739}
8740
cd5875fe
TM		 8741int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8742 struct pnfs_device *pdev,
8743 struct rpc_cred *cred)
b1f69b75
AA		 8744{
8745 struct nfs4_exception exception = { };
8746 int err;
8747
8748 do {
8749 err = nfs4_handle_exception(server,
cd5875fe 8750 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8751 &exception);
8752 } while (exception.retry);
8753 return err;
8754}
8755EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8756
863a3c6c
AA		 8757static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8758{
8759 struct nfs4_layoutcommit_data *data = calldata;
8760 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 8761 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 8762
d9afbd1b
TM		 8763 nfs41_setup_sequence(session,
8764 &data->args.seq_args,
8765 &data->res.seq_res,
8766 task);
863a3c6c
AA		 8767}
8768
8769static void
8770nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8771{
8772 struct nfs4_layoutcommit_data *data = calldata;
8773 struct nfs_server *server = NFS_SERVER(data->args.inode);
8774
6ba7db34 8775 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8776 return;
8777
8778 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8779 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8780 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8781 case -NFS4ERR_BADLAYOUT: /* no layout */
8782 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8783 task->tk_status = 0;
e59d27e0 8784 case 0:
e59d27e0
TM		 8785 break;
8786 default:
8478eaa1 8787 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8788 rpc_restart_call_prepare(task);
8789 return;
8790 }
8791 }
863a3c6c
AA		 8792}
8793
8794static void nfs4_layoutcommit_release(void *calldata)
8795{
8796 struct nfs4_layoutcommit_data *data = calldata;
8797
db29c089 8798 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8799 nfs_post_op_update_inode_force_wcc(data->args.inode,
8800 data->res.fattr);
863a3c6c 8801 put_rpccred(data->cred);
472e2594 8802 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8803 kfree(data);
8804}
8805
8806static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8807 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8808 .rpc_call_done = nfs4_layoutcommit_done,
8809 .rpc_release = nfs4_layoutcommit_release,
8810};
8811
8812int
ef311537 8813nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8814{
8815 struct rpc_message msg = {
8816 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8817 .rpc_argp = &data->args,
8818 .rpc_resp = &data->res,
8819 .rpc_cred = data->cred,
8820 };
8821 struct rpc_task_setup task_setup_data = {
8822 .task = &data->task,
8823 .rpc_client = NFS_CLIENT(data->args.inode),
8824 .rpc_message = &msg,
8825 .callback_ops = &nfs4_layoutcommit_ops,
8826 .callback_data = data,
863a3c6c
AA		 8827 };
8828 struct rpc_task *task;
8829 int status = 0;
8830
b4839ebe
KM		 8831 dprintk("NFS: initiating layoutcommit call. sync %d "
8832 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8833 data->args.lastbytewritten,
8834 data->args.inode->i_ino);
8835
472e2594
TM		 8836 if (!sync) {
8837 data->inode = nfs_igrab_and_active(data->args.inode);
8838 if (data->inode == NULL) {
8839 nfs4_layoutcommit_release(data);
8840 return -EAGAIN;
8841 }
8842 task_setup_data.flags = RPC_TASK_ASYNC;
8843 }
a9c92d6b 8844 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8845 task = rpc_run_task(&task_setup_data);
8846 if (IS_ERR(task))
8847 return PTR_ERR(task);
472e2594
TM		 8848 if (sync)
8849 status = task->tk_status;
48c9579a 8850 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
863a3c6c
AA		 8851 dprintk("%s: status %d\n", __func__, status);
8852 rpc_put_task(task);
8853 return status;
8854}
fca78d6d 8855
97431204
AA		 8856/**
8857 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8858 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8859 */
fca78d6d
BS		 8860static int
8861_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8862 struct nfs_fsinfo *info,
8863 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8864{
8865 struct nfs41_secinfo_no_name_args args = {
8866 .style = SECINFO_STYLE_CURRENT_FH,
8867 };
8868 struct nfs4_secinfo_res res = {
8869 .flavors = flavors,
8870 };
8871 struct rpc_message msg = {
8872 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8873 .rpc_argp = &args,
8874 .rpc_resp = &res,
8875 };
b1b3e136 8876 struct rpc_clnt *clnt = server->client;
7cb852df 8877 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8878 int status;
8879
8880 if (use_integrity) {
8881 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8882 cred = nfs4_get_clid_cred(server->nfs_client);
8883 msg.rpc_cred = cred;
b1b3e136
WAA		 8884 }
8885
8886 dprintk("--> %s\n", __func__);
8887 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8888 &res.seq_res, 0);
8889 dprintk("<-- %s status=%d\n", __func__, status);
8890
7cb852df
WAA		 8891 if (cred)
8892 put_rpccred(cred);
b1b3e136
WAA		 8893
8894 return status;
fca78d6d
BS		 8895}
8896
8897static int
8898nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8899 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8900{
8901 struct nfs4_exception exception = { };
8902 int err;
8903 do {
b1b3e136
WAA		 8904 /* first try using integrity protection */
8905 err = -NFS4ERR_WRONGSEC;
8906
8907 /* try to use integrity protection with machine cred */
8908 if (_nfs4_is_integrity_protected(server->nfs_client))
8909 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8910 flavors, true);
8911
8912 /*
8913 * if unable to use integrity protection, or SECINFO with
8914 * integrity protection returns NFS4ERR_WRONGSEC (which is
8915 * disallowed by spec, but exists in deployed servers) use
8916 * the current filesystem's rpc_client and the user cred.
8917 */
8918 if (err == -NFS4ERR_WRONGSEC)
8919 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8920 flavors, false);
8921
fca78d6d
BS		 8922 switch (err) {
8923 case 0:
8924 case -NFS4ERR_WRONGSEC:
78b19bae 8925 case -ENOTSUPP:
05e9cfb4 8926 goto out;
fca78d6d
BS		 8927 default:
8928 err = nfs4_handle_exception(server, err, &exception);
8929 }
8930 } while (exception.retry);
05e9cfb4 8931out:
fca78d6d
BS		 8932 return err;
8933}
8934
8935static int
8936nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8937 struct nfs_fsinfo *info)
8938{
8939 int err;
8940 struct page *page;
367156d9 8941 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8942 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8943 struct nfs4_secinfo4 *secinfo;
8944 int i;
fca78d6d
BS		 8945
8946 page = alloc_page(GFP_KERNEL);
8947 if (!page) {
8948 err = -ENOMEM;
8949 goto out;
8950 }
8951
8952 flavors = page_address(page);
8953 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8954
8955 /*
8956 * Fall back on "guess and check" method if
8957 * the server doesn't support SECINFO_NO_NAME
8958 */
78b19bae 8959 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8960 err = nfs4_find_root_sec(server, fhandle, info);
8961 goto out_freepage;
8962 }
8963 if (err)
8964 goto out_freepage;
8965
58a8cf12
WAA		 8966 for (i = 0; i < flavors->num_flavors; i++) {
8967 secinfo = &flavors->flavors[i];
8968
8969 switch (secinfo->flavor) {
8970 case RPC_AUTH_NULL:
8971 case RPC_AUTH_UNIX:
8972 case RPC_AUTH_GSS:
8973 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8974 &secinfo->flavor_info);
8975 break;
8976 default:
8977 flavor = RPC_AUTH_MAXFLAVOR;
8978 break;
8979 }
8980
4d4b69dd
WAA		 8981 if (!nfs_auth_info_match(&server->auth_info, flavor))
8982 flavor = RPC_AUTH_MAXFLAVOR;
8983
58a8cf12
WAA		 8984 if (flavor != RPC_AUTH_MAXFLAVOR) {
8985 err = nfs4_lookup_root_sec(server, fhandle,
8986 info, flavor);
8987 if (!err)
8988 break;
8989 }
8990 }
8991
8992 if (flavor == RPC_AUTH_MAXFLAVOR)
8993 err = -EPERM;
fca78d6d
BS		 8994
8995out_freepage:
8996 put_page(page);
8997 if (err == -EACCES)
8998 return -EPERM;
8999out:
9000 return err;
9001}
1cab0652 9002
ab7cb0df
TM		 9003static int _nfs41_test_stateid(struct nfs_server *server,
9004 nfs4_stateid *stateid,
9005 struct rpc_cred *cred)
7d974794
BS		 9006{
9007 int status;
9008 struct nfs41_test_stateid_args args = {
1cab0652 9009 .stateid = stateid,
7d974794
BS		 9010 };
9011 struct nfs41_test_stateid_res res;
9012 struct rpc_message msg = {
9013 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
9014 .rpc_argp = &args,
9015 .rpc_resp = &res,
ab7cb0df 9016 .rpc_cred = cred,
7d974794 9017 };
3787d506
WAA		 9018 struct rpc_clnt *rpc_client = server->client;
9019
9020 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9021 &rpc_client, &msg);
1cab0652 9022
38527b15 9023 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 9024 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 9025 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 9026 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 9027 &args.seq_args, &res.seq_res);
38527b15
CL		 9028 if (status != NFS_OK) {
9029 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 9030 return status;
38527b15
CL		 9031 }
9032 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 9033 return -res.status;
7d974794
BS		 9034}
9035
43912bbb
TM		 9036static void nfs4_handle_delay_or_session_error(struct nfs_server *server,
9037 int err, struct nfs4_exception *exception)
9038{
9039 exception->retry = 0;
9040 switch(err) {
9041 case -NFS4ERR_DELAY:
76e8a1bd 9042 case -NFS4ERR_RETRY_UNCACHED_REP:
43912bbb
TM		 9043 nfs4_handle_exception(server, err, exception);
9044 break;
9045 case -NFS4ERR_BADSESSION:
9046 case -NFS4ERR_BADSLOT:
9047 case -NFS4ERR_BAD_HIGH_SLOT:
9048 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
9049 case -NFS4ERR_DEADSESSION:
9050 nfs4_do_handle_exception(server, err, exception);
9051 }
9052}
9053
38527b15
CL		 9054/**
9055 * nfs41_test_stateid - perform a TEST_STATEID operation
9056 *
9057 * @server: server / transport on which to perform the operation
9058 * @stateid: state ID to test
ab7cb0df 9059 * @cred: credential
38527b15
CL		 9060 *
9061 * Returns NFS_OK if the server recognizes that "stateid" is valid.
9062 * Otherwise a negative NFS4ERR value is returned if the operation
9063 * failed or the state ID is not currently valid.
9064 */
ab7cb0df
TM		 9065static int nfs41_test_stateid(struct nfs_server *server,
9066 nfs4_stateid *stateid,
9067 struct rpc_cred *cred)
7d974794
BS		 9068{
9069 struct nfs4_exception exception = { };
9070 int err;
9071 do {
ab7cb0df 9072 err = _nfs41_test_stateid(server, stateid, cred);
43912bbb 9073 nfs4_handle_delay_or_session_error(server, err, &exception);
7d974794
BS		 9074 } while (exception.retry);
9075 return err;
9076}
9aeda35f 9077
7c1d5fae
TM		 9078struct nfs_free_stateid_data {
9079 struct nfs_server *server;
9080 struct nfs41_free_stateid_args args;
9aeda35f 9081 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 9082};
9083
9084static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
9085{
9086 struct nfs_free_stateid_data *data = calldata;
9087 nfs41_setup_sequence(nfs4_get_session(data->server),
9088 &data->args.seq_args,
9089 &data->res.seq_res,
9090 task);
9091}
9092
9093static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
9094{
9095 struct nfs_free_stateid_data *data = calldata;
9096
9097 nfs41_sequence_done(task, &data->res.seq_res);
9098
9099 switch (task->tk_status) {
9100 case -NFS4ERR_DELAY:
8478eaa1 9101 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 9102 rpc_restart_call_prepare(task);
9103 }
9104}
9105
9106static void nfs41_free_stateid_release(void *calldata)
9107{
9108 kfree(calldata);
9109}
9110
17f26b12 9111static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 9112 .rpc_call_prepare = nfs41_free_stateid_prepare,
9113 .rpc_call_done = nfs41_free_stateid_done,
9114 .rpc_release = nfs41_free_stateid_release,
9115};
9116
9117static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
f0b0bf88 9118 const nfs4_stateid *stateid,
ab7cb0df 9119 struct rpc_cred *cred,
7c1d5fae
TM		 9120 bool privileged)
9121{
9aeda35f
BS		 9122 struct rpc_message msg = {
9123 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 9124 .rpc_cred = cred,
9aeda35f 9125 };
7c1d5fae
TM		 9126 struct rpc_task_setup task_setup = {
9127 .rpc_client = server->client,
9128 .rpc_message = &msg,
9129 .callback_ops = &nfs41_free_stateid_ops,
9130 .flags = RPC_TASK_ASYNC,
9131 };
9132 struct nfs_free_stateid_data *data;
9aeda35f 9133
3787d506
WAA		 9134 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9135 &task_setup.rpc_client, &msg);
9136
38527b15 9137 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 9138 data = kmalloc(sizeof(*data), GFP_NOFS);
9139 if (!data)
9140 return ERR_PTR(-ENOMEM);
9141 data->server = server;
9142 nfs4_stateid_copy(&data->args.stateid, stateid);
9143
9144 task_setup.callback_data = data;
9145
9146 msg.rpc_argp = &data->args;
9147 msg.rpc_resp = &data->res;
76e8a1bd 9148 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
7c1d5fae
TM		 9149 if (privileged)
9150 nfs4_set_sequence_privileged(&data->args.seq_args);
9151
9152 return rpc_run_task(&task_setup);
9aeda35f
BS		 9153}
9154
38527b15
CL		 9155/**
9156 * nfs41_free_stateid - perform a FREE_STATEID operation
9157 *
9158 * @server: server / transport on which to perform the operation
9159 * @stateid: state ID to release
ab7cb0df 9160 * @cred: credential
f0b0bf88 9161 * @is_recovery: set to true if this call needs to be privileged
38527b15 9162 *
f0b0bf88 9163 * Note: this function is always asynchronous.
38527b15 9164 */
ab7cb0df 9165static int nfs41_free_stateid(struct nfs_server *server,
f0b0bf88
TM		 9166 const nfs4_stateid *stateid,
9167 struct rpc_cred *cred,
9168 bool is_recovery)
9aeda35f 9169{
7c1d5fae 9170 struct rpc_task *task;
7c1d5fae 9171
f0b0bf88 9172 task = _nfs41_free_stateid(server, stateid, cred, is_recovery);
7c1d5fae
TM		 9173 if (IS_ERR(task))
9174 return PTR_ERR(task);
7c1d5fae 9175 rpc_put_task(task);
f0b0bf88 9176 return 0;
9aeda35f 9177}
36281caa 9178
f1cdae87
JL		 9179static void
9180nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf 9181{
ab7cb0df 9182 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 9183
f0b0bf88 9184 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf 9185 nfs4_free_lock_state(server, lsp);
c8b2d0bf
TM		 9186}
9187
36281caa
TM		 9188static bool nfs41_match_stateid(const nfs4_stateid *s1,
9189 const nfs4_stateid *s2)
9190{
93b717fd
TM		 9191 if (s1->type != s2->type)
9192 return false;
9193
2d2f24ad 9194 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 9195 return false;
9196
2d2f24ad 9197 if (s1->seqid == s2->seqid)
36281caa 9198 return true;
2d2f24ad 9199 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 9200 return true;
9201
9202 return false;
9203}
9204
557134a3
AA		 9205#endif /* CONFIG_NFS_V4_1 */
9206
36281caa
TM		 9207static bool nfs4_match_stateid(const nfs4_stateid *s1,
9208 const nfs4_stateid *s2)
9209{
f597c537 9210 return nfs4_stateid_match(s1, s2);
36281caa
TM		 9211}
9212
9213
17280175 9214static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 9215 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 9216 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 9217 .recover_open = nfs4_open_reclaim,
9218 .recover_lock = nfs4_lock_reclaim,
591d71cb 9219 .establish_clid = nfs4_init_clientid,
05f4c350 9220 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 9221};
9222
591d71cb 9223#if defined(CONFIG_NFS_V4_1)
17280175 9224static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 9225 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9226 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9227 .recover_open = nfs4_open_reclaim,
9228 .recover_lock = nfs4_lock_reclaim,
4d643d1d 9229 .establish_clid = nfs41_init_clientid,
fce5c838 9230 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 9231 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 9232};
9233#endif /* CONFIG_NFS_V4_1 */
9234
17280175 9235static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 9236 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9237 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 9238 .recover_open = nfs40_open_expired,
591d71cb
AA		 9239 .recover_lock = nfs4_lock_expired,
9240 .establish_clid = nfs4_init_clientid,
9241};
9242
9243#if defined(CONFIG_NFS_V4_1)
17280175 9244static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 9245 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 9246 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 9247 .recover_open = nfs41_open_expired,
9248 .recover_lock = nfs41_lock_expired,
4d643d1d 9249 .establish_clid = nfs41_init_clientid,
1da177e4 9250};
591d71cb 9251#endif /* CONFIG_NFS_V4_1 */
1da177e4 9252
17280175 9253static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 9254 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 9255 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 9256 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 9257};
9258
9259#if defined(CONFIG_NFS_V4_1)
17280175 9260static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 9261 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 9262 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 9263 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 9264};
9265#endif
9266
ec011fe8 9267static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 9268 .get_locations = _nfs40_proc_get_locations,
44c99933 9269 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 9270};
9271
9272#if defined(CONFIG_NFS_V4_1)
9273static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 9274 .get_locations = _nfs41_proc_get_locations,
44c99933 9275 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 9276};
9277#endif /* CONFIG_NFS_V4_1 */
9278
97dc1359
TM		 9279static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
9280 .minor_version = 0,
39c6daae
TM		 9281 .init_caps = NFS_CAP_READDIRPLUS
9282 | NFS_CAP_ATOMIC_OPEN
39c6daae 9283 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 9284 .init_client = nfs40_init_client,
9285 .shutdown_client = nfs40_shutdown_client,
36281caa 9286 .match_stateid = nfs4_match_stateid,
fca78d6d 9287 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 9288 .free_lock_state = nfs4_release_lockowner,
45870d69 9289 .test_and_free_expired = nfs40_test_and_free_expired_stateid,
63f5f796 9290 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 9291 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 9292 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
9293 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
9294 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 9295 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 9296};
9297
9298#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 9299static struct nfs_seqid *
9300nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
9301{
9302 return NULL;
9303}
9304
97dc1359
TM		 9305static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
9306 .minor_version = 1,
39c6daae
TM		 9307 .init_caps = NFS_CAP_READDIRPLUS
9308 | NFS_CAP_ATOMIC_OPEN
3b66486c 9309 | NFS_CAP_POSIX_LOCK
49f9a0fa 9310 | NFS_CAP_STATEID_NFSV41
e983120e 9311 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 9312 .init_client = nfs41_init_client,
9313 .shutdown_client = nfs41_shutdown_client,
36281caa 9314 .match_stateid = nfs41_match_stateid,
fca78d6d 9315 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 9316 .free_lock_state = nfs41_free_lock_state,
45870d69 9317 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 9318 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 9319 .session_trunk = nfs4_test_session_trunk,
9915ea7e 9320 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 9321 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9322 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9323 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 9324 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 9325};
9326#endif
9327
42c2c424
SD		 9328#if defined(CONFIG_NFS_V4_2)
9329static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
9330 .minor_version = 2,
7017310a
BS		 9331 .init_caps = NFS_CAP_READDIRPLUS
9332 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 9333 | NFS_CAP_POSIX_LOCK
9334 | NFS_CAP_STATEID_NFSV41
e983120e 9335 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 9336 | NFS_CAP_ALLOCATE
2e72448b 9337 | NFS_CAP_COPY
624bd5b7 9338 | NFS_CAP_DEALLOCATE
6c5a0d89 9339 | NFS_CAP_SEEK
e5341f3a
PT		 9340 | NFS_CAP_LAYOUTSTATS
9341 | NFS_CAP_CLONE,
abf79bb3
CL		 9342 .init_client = nfs41_init_client,
9343 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 9344 .match_stateid = nfs41_match_stateid,
9345 .find_root_sec = nfs41_find_root_sec,
7017310a 9346 .free_lock_state = nfs41_free_lock_state,
9915ea7e 9347 .call_sync_ops = &nfs41_call_sync_ops,
45870d69 9348 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 9349 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 9350 .session_trunk = nfs4_test_session_trunk,
42c2c424
SD		 9351 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9352 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9353 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 9354 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 9355};
9356#endif
9357
97dc1359
TM		 9358const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
9359 [0] = &nfs_v4_0_minor_ops,
9360#if defined(CONFIG_NFS_V4_1)
9361 [1] = &nfs_v4_1_minor_ops,
9362#endif
42c2c424
SD		 9363#if defined(CONFIG_NFS_V4_2)
9364 [2] = &nfs_v4_2_minor_ops,
9365#endif
97dc1359
TM		 9366};
9367
13997823 9368static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
c4803c49
AG		 9369{
9370 ssize_t error, error2;
9371
9372 error = generic_listxattr(dentry, list, size);
9373 if (error < 0)
9374 return error;
9375 if (list) {
9376 list += error;
9377 size -= error;
9378 }
9379
9380 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
9381 if (error2 < 0)
9382 return error2;
9383 return error + error2;
9384}
9385
17f26b12 9386static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 9387 .create = nfs_create,
9388 .lookup = nfs_lookup,
9389 .atomic_open = nfs_atomic_open,
9390 .link = nfs_link,
9391 .unlink = nfs_unlink,
9392 .symlink = nfs_symlink,
9393 .mkdir = nfs_mkdir,
9394 .rmdir = nfs_rmdir,
9395 .mknod = nfs_mknod,
9396 .rename = nfs_rename,
9397 .permission = nfs_permission,
9398 .getattr = nfs_getattr,
9399 .setattr = nfs_setattr,
c4803c49 9400 .listxattr = nfs4_listxattr,
73a79706
BS		 9401};
9402
92e1d5be 9403static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 9404 .permission = nfs_permission,
9405 .getattr = nfs_getattr,
9406 .setattr = nfs_setattr,
c4803c49 9407 .listxattr = nfs4_listxattr,
6b3b5496
BF		 9408};
9409
509de811 9410const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 9411 .version = 4, /* protocol version */
9412 .dentry_ops = &nfs4_dentry_operations,
9413 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 9414 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 9415 .file_ops = &nfs4_file_operations,
1da177e4 9416 .getroot = nfs4_proc_get_root,
281cad46 9417 .submount = nfs4_submount,
ff9099f2 9418 .try_mount = nfs4_try_mount,
1da177e4
LT		 9419 .getattr = nfs4_proc_getattr,
9420 .setattr = nfs4_proc_setattr,
9421 .lookup = nfs4_proc_lookup,
9422 .access = nfs4_proc_access,
9423 .readlink = nfs4_proc_readlink,
1da177e4
LT		 9424 .create = nfs4_proc_create,
9425 .remove = nfs4_proc_remove,
9426 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 9427 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 9428 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 9429 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 9430 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 9431 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 9432 .link = nfs4_proc_link,
9433 .symlink = nfs4_proc_symlink,
9434 .mkdir = nfs4_proc_mkdir,
9435 .rmdir = nfs4_proc_remove,
9436 .readdir = nfs4_proc_readdir,
9437 .mknod = nfs4_proc_mknod,
9438 .statfs = nfs4_proc_statfs,
9439 .fsinfo = nfs4_proc_fsinfo,
9440 .pathconf = nfs4_proc_pathconf,
e9326dca 9441 .set_capabilities = nfs4_server_capabilities,
1da177e4 9442 .decode_dirent = nfs4_decode_dirent,
a4cdda59 9443 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 9444 .read_setup = nfs4_proc_read_setup,
ec06c096 9445 .read_done = nfs4_read_done,
1da177e4 9446 .write_setup = nfs4_proc_write_setup,
788e7a89 9447 .write_done = nfs4_write_done,
1da177e4 9448 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 9449 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 9450 .commit_done = nfs4_commit_done,
1da177e4 9451 .lock = nfs4_proc_lock,
e50a1c2e 9452 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 9453 .close_context = nfs4_close_context,
2b484297 9454 .open_context = nfs4_atomic_open,
011e2a7f 9455 .have_delegation = nfs4_have_delegation,
57ec14c5 9456 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 9457 .alloc_client = nfs4_alloc_client,
45a52a02 9458 .init_client = nfs4_init_client,
cdb7eced 9459 .free_client = nfs4_free_client,
1179acc6
BS		 9460 .create_server = nfs4_create_server,
9461 .clone_server = nfs_clone_server,
1da177e4
LT		 9462};
9463
64c2ce8b 9464static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
98e9cb57 9465 .name = XATTR_NAME_NFSV4_ACL,
64c2ce8b
AK		 9466 .list = nfs4_xattr_list_nfs4_acl,
9467 .get = nfs4_xattr_get_nfs4_acl,
9468 .set = nfs4_xattr_set_nfs4_acl,
9469};
9470
9471const struct xattr_handler *nfs4_xattr_handlers[] = {
9472 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 9473#ifdef CONFIG_NFS_V4_SECURITY_LABEL
9474 &nfs4_xattr_nfs4_label_handler,
9475#endif
64c2ce8b
AK		 9476 NULL
9477};
9478
1da177e4
LT		 9479/*
9480 * Local variables:
9481 * c-basic-offset: 8
9482 * End:
9483 */
ubuntu-bionic-kernel mirror