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NFS: Retry the CLOSE if the embedded GETATTR is rejected with EACCES
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
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;
e603a4c1
TM		 1092 if (cinfo->atomic && cinfo->before == dir->i_version) {
1093 nfsi->cache_validity &= ~NFS_INO_REVAL_PAGECACHE;
1094 nfsi->attrtimeo_timestamp = jiffies;
1095 } else {
bfc69a45 1096 nfs_force_lookup_revalidate(dir);
e603a4c1
TM		 1097 if (cinfo->before != dir->i_version)
1098 nfsi->cache_validity |= NFS_INO_INVALID_ACCESS |
1099 NFS_INO_INVALID_ACL;
1100 }
a9a4a87a 1101 dir->i_version = cinfo->after;
3235b403 1102 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
de242c0b 1103 nfs_fscache_invalidate(dir);
38478b24 1104 spin_unlock(&dir->i_lock);
1da177e4
LT		 1105}
1106
e56e0b78 1107struct nfs4_opendata {
c6d00e63 1108 struct kref kref;
e56e0b78
TM		 1109 struct nfs_openargs o_arg;
1110 struct nfs_openres o_res;
cdd4e68b
TM		 1111 struct nfs_open_confirmargs c_arg;
1112 struct nfs_open_confirmres c_res;
6926afd1
TM		 1113 struct nfs4_string owner_name;
1114 struct nfs4_string group_name;
a49c2691 1115 struct nfs4_label *a_label;
e56e0b78 1116 struct nfs_fattr f_attr;
1775fd3e 1117 struct nfs4_label *f_label;
e56e0b78 1118 struct dentry *dir;
82a2c1b7 1119 struct dentry *dentry;
e56e0b78 1120 struct nfs4_state_owner *owner;
aac00a8d 1121 struct nfs4_state *state;
e56e0b78 1122 struct iattr attrs;
26e976a8 1123 unsigned long timestamp;
3e309914 1124 unsigned int rpc_done : 1;
5bc2afc2 1125 unsigned int file_created : 1;
bdeca1b7 1126 unsigned int is_recover : 1;
24ac23ab
TM		 1127 int rpc_status;
1128 int cancelled;
e56e0b78
TM		 1129};
1130
49f9a0fa
TM		 1131static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1132 int err, struct nfs4_exception *exception)
1133{
1134 if (err != -EINVAL)
1135 return false;
1136 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1137 return false;
1138 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1139 exception->retry = 1;
1140 return true;
1141}
1142
6ae37339
TM		 1143static u32
1144nfs4_map_atomic_open_share(struct nfs_server *server,
1145 fmode_t fmode, int openflags)
1146{
1147 u32 res = 0;
1148
1149 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1150 case FMODE_READ:
1151 res = NFS4_SHARE_ACCESS_READ;
1152 break;
1153 case FMODE_WRITE:
1154 res = NFS4_SHARE_ACCESS_WRITE;
1155 break;
1156 case FMODE_READ|FMODE_WRITE:
1157 res = NFS4_SHARE_ACCESS_BOTH;
1158 }
1159 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1160 goto out;
1161 /* Want no delegation if we're using O_DIRECT */
1162 if (openflags & O_DIRECT)
1163 res |= NFS4_SHARE_WANT_NO_DELEG;
1164out:
1165 return res;
1166}
1167
49f9a0fa
TM		 1168static enum open_claim_type4
1169nfs4_map_atomic_open_claim(struct nfs_server *server,
1170 enum open_claim_type4 claim)
1171{
1172 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1173 return claim;
1174 switch (claim) {
1175 default:
1176 return claim;
1177 case NFS4_OPEN_CLAIM_FH:
1178 return NFS4_OPEN_CLAIM_NULL;
1179 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1180 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1181 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1182 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1183 }
1184}
2ced46c2
TM		 1185
1186static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1187{
1188 p->o_res.f_attr = &p->f_attr;
1775fd3e 1189 p->o_res.f_label = p->f_label;
c1d51931
TM		 1190 p->o_res.seqid = p->o_arg.seqid;
1191 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 1192 p->o_res.server = p->o_arg.server;
5f657530 1193 p->o_res.access_request = p->o_arg.access;
2ced46c2 1194 nfs_fattr_init(&p->f_attr);
6926afd1 1195 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 1196}
1197
82a2c1b7 1198static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 1199 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 1200 const struct iattr *attrs,
1775fd3e 1201 struct nfs4_label *label,
4a1c0893 1202 enum open_claim_type4 claim,
8535b2be 1203 gfp_t gfp_mask)
e56e0b78 1204{
82a2c1b7 1205 struct dentry *parent = dget_parent(dentry);
2b0143b5 1206 struct inode *dir = d_inode(parent);
e56e0b78 1207 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1208 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 1209 struct nfs4_opendata *p;
1210
8535b2be 1211 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1212 if (p == NULL)
1213 goto err;
14c43f76
DQ		 1214
1215 p->f_label = nfs4_label_alloc(server, gfp_mask);
1216 if (IS_ERR(p->f_label))
1217 goto err_free_p;
1218
a49c2691
KM		 1219 p->a_label = nfs4_label_alloc(server, gfp_mask);
1220 if (IS_ERR(p->a_label))
1221 goto err_free_f;
1222
63f5f796
TM		 1223 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1224 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1225 if (IS_ERR(p->o_arg.seqid))
14c43f76 1226 goto err_free_label;
82a2c1b7
AV		 1227 nfs_sb_active(dentry->d_sb);
1228 p->dentry = dget(dentry);
e56e0b78
TM		 1229 p->dir = parent;
1230 p->owner = sp;
1231 atomic_inc(&sp->so_count);
dc0b027d
TM		 1232 p->o_arg.open_flags = flags;
1233 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
dff25ddb 1234 p->o_arg.umask = current_umask();
536585cc 1235 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
6ae37339
TM		 1236 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1237 fmode, flags);
ae2bb032
WAA		 1238 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1239 * will return permission denied for all bits until close */
1240 if (!(flags & O_EXCL)) {
1241 /* ask server to check for all possible rights as results
1242 * are cached */
536585cc
TM		 1243 switch (p->o_arg.claim) {
1244 default:
1245 break;
1246 case NFS4_OPEN_CLAIM_NULL:
1247 case NFS4_OPEN_CLAIM_FH:
1248 p->o_arg.access = NFS4_ACCESS_READ |
1249 NFS4_ACCESS_MODIFY |
1250 NFS4_ACCESS_EXTEND |
1251 NFS4_ACCESS_EXECUTE;
1252 }
ae2bb032 1253 }
7539bbab 1254 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1255 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1256 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1257 p->o_arg.name = &dentry->d_name;
e56e0b78 1258 p->o_arg.server = server;
aa9c2669 1259 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1260 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
a49c2691 1261 p->o_arg.label = nfs4_label_copy(p->a_label, label);
49f9a0fa 1262 switch (p->o_arg.claim) {
4a1c0893
TM		 1263 case NFS4_OPEN_CLAIM_NULL:
1264 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1265 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1266 p->o_arg.fh = NFS_FH(dir);
1267 break;
1268 case NFS4_OPEN_CLAIM_PREVIOUS:
1269 case NFS4_OPEN_CLAIM_FH:
1270 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1271 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1272 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1273 }
536e43d1 1274 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1275 __u32 verf[2];
d77d76ff 1276
e56e0b78
TM		 1277 p->o_arg.u.attrs = &p->attrs;
1278 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1279
1280 verf[0] = jiffies;
1281 verf[1] = current->pid;
1282 memcpy(p->o_arg.u.verifier.data, verf,
1283 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1284 }
cdd4e68b
TM		 1285 p->c_arg.fh = &p->o_res.fh;
1286 p->c_arg.stateid = &p->o_res.stateid;
1287 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1288 nfs4_init_opendata_res(p);
c6d00e63 1289 kref_init(&p->kref);
e56e0b78 1290 return p;
14c43f76
DQ		 1291
1292err_free_label:
a49c2691
KM		 1293 nfs4_label_free(p->a_label);
1294err_free_f:
14c43f76
DQ		 1295 nfs4_label_free(p->f_label);
1296err_free_p:
e56e0b78
TM		 1297 kfree(p);
1298err:
1299 dput(parent);
1300 return NULL;
1301}
1302
c6d00e63 1303static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1304{
c6d00e63
TM		 1305 struct nfs4_opendata *p = container_of(kref,
1306 struct nfs4_opendata, kref);
82a2c1b7 1307 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1308
1309 nfs_free_seqid(p->o_arg.seqid);
2e80dbe7 1310 nfs4_sequence_free_slot(&p->o_res.seq_res);
aac00a8d
TM		 1311 if (p->state != NULL)
1312 nfs4_put_open_state(p->state);
c6d00e63 1313 nfs4_put_state_owner(p->owner);
14c43f76 1314
a49c2691 1315 nfs4_label_free(p->a_label);
14c43f76
DQ		 1316 nfs4_label_free(p->f_label);
1317
c6d00e63 1318 dput(p->dir);
82a2c1b7
AV		 1319 dput(p->dentry);
1320 nfs_sb_deactive(sb);
6926afd1 1321 nfs_fattr_free_names(&p->f_attr);
e911b815 1322 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1323 kfree(p);
1324}
1325
1326static void nfs4_opendata_put(struct nfs4_opendata *p)
1327{
1328 if (p != NULL)
1329 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1330}
1331
06f814a3
TM		 1332static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1333{
06f814a3
TM		 1334 int ret;
1335
06f814a3 1336 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1337 return ret;
1338}
1339
24311f88
TM		 1340static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1341 fmode_t fmode)
1342{
1343 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1344 case FMODE_READ|FMODE_WRITE:
1345 return state->n_rdwr != 0;
1346 case FMODE_WRITE:
1347 return state->n_wronly != 0;
1348 case FMODE_READ:
1349 return state->n_rdonly != 0;
1350 }
1351 WARN_ON_ONCE(1);
1352 return false;
1353}
1354
dc0b027d 1355static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1356{
1357 int ret = 0;
dc0b027d 1358
536e43d1 1359 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1360 goto out;
1361 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1362 case FMODE_READ:
88069f77
TM		 1363 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1364 && state->n_rdonly != 0;
6ee41268
TM		 1365 break;
1366 case FMODE_WRITE:
88069f77
TM		 1367 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1368 && state->n_wronly != 0;
6ee41268
TM		 1369 break;
1370 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1371 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1372 && state->n_rdwr != 0;
6ee41268 1373 }
dc0b027d 1374out:
6ee41268
TM		 1375 return ret;
1376}
1377
2a606188
TM		 1378static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1379 enum open_claim_type4 claim)
aac00a8d 1380{
652f89f6
TM		 1381 if (delegation == NULL)
1382 return 0;
dc0b027d 1383 if ((delegation->type & fmode) != fmode)
aac00a8d 1384 return 0;
d25be546
TM		 1385 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1386 return 0;
2a606188
TM		 1387 switch (claim) {
1388 case NFS4_OPEN_CLAIM_NULL:
1389 case NFS4_OPEN_CLAIM_FH:
1390 break;
1391 case NFS4_OPEN_CLAIM_PREVIOUS:
1392 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1393 break;
1394 default:
1395 return 0;
1396 }
b7391f44 1397 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1398 return 1;
1399}
1400
dc0b027d 1401static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1402{
dc0b027d 1403 switch (fmode) {
e7616923
TM		 1404 case FMODE_WRITE:
1405 state->n_wronly++;
1406 break;
1407 case FMODE_READ:
1408 state->n_rdonly++;
1409 break;
1410 case FMODE_READ|FMODE_WRITE:
1411 state->n_rdwr++;
1412 }
dc0b027d 1413 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1414}
1415
8a64c4ef
TM		 1416#ifdef CONFIG_NFS_V4_1
1417static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state)
1418{
1419 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags))
1420 return true;
1421 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags))
1422 return true;
1423 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags))
1424 return true;
1425 return false;
1426}
1427#endif /* CONFIG_NFS_V4_1 */
1428
4f14c194
TM		 1429static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1430{
1431 struct nfs_client *clp = state->owner->so_server->nfs_client;
1432 bool need_recover = false;
1433
1434 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1435 need_recover = true;
1436 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1437 need_recover = true;
1438 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1439 need_recover = true;
1440 if (need_recover)
1441 nfs4_state_mark_reclaim_nograce(clp, state);
1442}
1443
e999e80e 1444static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1393d961 1445 const nfs4_stateid *stateid, nfs4_stateid *freeme)
e999e80e
TM		 1446{
1447 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1448 return true;
4f14c194 1449 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1393d961 1450 nfs4_stateid_copy(freeme, &state->open_stateid);
4f14c194 1451 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1452 return true;
4f14c194 1453 }
e999e80e
TM		 1454 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1455 return true;
1456 return false;
1457}
1458
f95549cf
TM		 1459static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1460{
3c38cbe2
TM		 1461 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1462 return;
f95549cf
TM		 1463 if (state->n_wronly)
1464 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1465 if (state->n_rdonly)
1466 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1467 if (state->n_rdwr)
1468 set_bit(NFS_O_RDWR_STATE, &state->flags);
3c38cbe2 1469 set_bit(NFS_OPEN_STATE, &state->flags);
f95549cf
TM		 1470}
1471
226056c5
TM		 1472static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1473 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1474{
226056c5
TM		 1475 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1476 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1477 case FMODE_WRITE:
1478 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1479 break;
1480 case FMODE_READ:
1481 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1482 break;
1483 case 0:
1484 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1485 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1486 clear_bit(NFS_OPEN_STATE, &state->flags);
1487 }
1488 if (stateid == NULL)
1489 return;
3e7dfb16
TM		 1490 /* Handle OPEN+OPEN_DOWNGRADE races */
1491 if (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1492 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
f95549cf 1493 nfs_resync_open_stateid_locked(state);
226056c5 1494 return;
f95549cf 1495 }
003707c7 1496 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1497 nfs4_stateid_copy(&state->stateid, stateid);
1498 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1499}
1500
4a1e2feb
TM		 1501static void nfs_clear_open_stateid(struct nfs4_state *state,
1502 nfs4_stateid *arg_stateid,
1503 nfs4_stateid *stateid, fmode_t fmode)
226056c5
TM		 1504{
1505 write_seqlock(&state->seqlock);
3e7dfb16
TM		 1506 /* Ignore, if the CLOSE argment doesn't match the current stateid */
1507 if (nfs4_state_match_open_stateid_other(state, arg_stateid))
1508 nfs_clear_open_stateid_locked(state, stateid, fmode);
226056c5 1509 write_sequnlock(&state->seqlock);
4f14c194
TM		 1510 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1511 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1512}
1513
1393d961
TM		 1514static void nfs_set_open_stateid_locked(struct nfs4_state *state,
1515 const nfs4_stateid *stateid, fmode_t fmode,
1516 nfs4_stateid *freeme)
003707c7 1517{
dc0b027d 1518 switch (fmode) {
003707c7
TM		 1519 case FMODE_READ:
1520 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1521 break;
1522 case FMODE_WRITE:
1523 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1524 break;
1525 case FMODE_READ|FMODE_WRITE:
1526 set_bit(NFS_O_RDWR_STATE, &state->flags);
1527 }
1393d961 1528 if (!nfs_need_update_open_stateid(state, stateid, freeme))
e999e80e
TM		 1529 return;
1530 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1531 nfs4_stateid_copy(&state->stateid, stateid);
1532 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1533}
1534
1393d961
TM		 1535static void __update_open_stateid(struct nfs4_state *state,
1536 const nfs4_stateid *open_stateid,
1537 const nfs4_stateid *deleg_stateid,
1538 fmode_t fmode,
1539 nfs4_stateid *freeme)
1da177e4 1540{
8bda4e4c
TM		 1541 /*
1542 * Protect the call to nfs4_state_set_mode_locked and
1543 * serialise the stateid update
1544 */
361cad3c 1545 spin_lock(&state->owner->so_lock);
8bda4e4c 1546 write_seqlock(&state->seqlock);
003707c7 1547 if (deleg_stateid != NULL) {
f597c537 1548 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1549 set_bit(NFS_DELEGATED_STATE, &state->flags);
1550 }
1551 if (open_stateid != NULL)
1393d961 1552 nfs_set_open_stateid_locked(state, open_stateid, fmode, freeme);
8bda4e4c 1553 write_sequnlock(&state->seqlock);
dc0b027d 1554 update_open_stateflags(state, fmode);
ec073428 1555 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1556}
1557
1393d961
TM		 1558static int update_open_stateid(struct nfs4_state *state,
1559 const nfs4_stateid *open_stateid,
1560 const nfs4_stateid *delegation,
1561 fmode_t fmode)
34310430 1562{
1393d961
TM		 1563 struct nfs_server *server = NFS_SERVER(state->inode);
1564 struct nfs_client *clp = server->nfs_client;
34310430
TM		 1565 struct nfs_inode *nfsi = NFS_I(state->inode);
1566 struct nfs_delegation *deleg_cur;
83aa3e0f 1567 nfs4_stateid freeme = { };
34310430
TM		 1568 int ret = 0;
1569
dc0b027d 1570 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1571
1572 rcu_read_lock();
1573 deleg_cur = rcu_dereference(nfsi->delegation);
1574 if (deleg_cur == NULL)
1575 goto no_delegation;
1576
1577 spin_lock(&deleg_cur->lock);
17f26b12 1578 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1579 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1580 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1581 goto no_delegation_unlock;
1582
1583 if (delegation == NULL)
1584 delegation = &deleg_cur->stateid;
f597c537 1585 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1586 goto no_delegation_unlock;
1587
b7391f44 1588 nfs_mark_delegation_referenced(deleg_cur);
1393d961
TM		 1589 __update_open_stateid(state, open_stateid, &deleg_cur->stateid,
1590 fmode, &freeme);
34310430
TM		 1591 ret = 1;
1592no_delegation_unlock:
1593 spin_unlock(&deleg_cur->lock);
1594no_delegation:
1595 rcu_read_unlock();
1596
1597 if (!ret && open_stateid != NULL) {
1393d961 1598 __update_open_stateid(state, open_stateid, NULL, fmode, &freeme);
34310430
TM		 1599 ret = 1;
1600 }
4f14c194 1601 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1393d961
TM		 1602 nfs4_schedule_state_manager(clp);
1603 if (freeme.type != 0)
1604 nfs4_test_and_free_stateid(server, &freeme,
1605 state->owner->so_cred);
34310430
TM		 1606
1607 return ret;
1608}
1609
39071e6f
TM		 1610static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1611 const nfs4_stateid *stateid)
1612{
1613 struct nfs4_state *state = lsp->ls_state;
1614 bool ret = false;
1615
1616 spin_lock(&state->state_lock);
1617 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1618 goto out_noupdate;
1619 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1620 goto out_noupdate;
1621 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1622 ret = true;
1623out_noupdate:
1624 spin_unlock(&state->state_lock);
1625 return ret;
1626}
34310430 1627
dc0b027d 1628static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1629{
1630 struct nfs_delegation *delegation;
1631
1632 rcu_read_lock();
1633 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1634 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1635 rcu_read_unlock();
1636 return;
1637 }
1638 rcu_read_unlock();
57ec14c5 1639 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1640}
1641
6ee41268 1642static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1643{
1644 struct nfs4_state *state = opendata->state;
1645 struct nfs_inode *nfsi = NFS_I(state->inode);
1646 struct nfs_delegation *delegation;
f448badd 1647 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1648 fmode_t fmode = opendata->o_arg.fmode;
2a606188 1649 enum open_claim_type4 claim = opendata->o_arg.claim;
aac00a8d
TM		 1650 nfs4_stateid stateid;
1651 int ret = -EAGAIN;
1652
aac00a8d 1653 for (;;) {
61beef75 1654 spin_lock(&state->owner->so_lock);
dc0b027d 1655 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1656 update_open_stateflags(state, fmode);
6ee41268 1657 spin_unlock(&state->owner->so_lock);
61beef75 1658 goto out_return_state;
6ee41268 1659 }
61beef75 1660 spin_unlock(&state->owner->so_lock);
34310430
TM		 1661 rcu_read_lock();
1662 delegation = rcu_dereference(nfsi->delegation);
2a606188 1663 if (!can_open_delegated(delegation, fmode, claim)) {
34310430 1664 rcu_read_unlock();
aac00a8d 1665 break;
34310430 1666 }
aac00a8d 1667 /* Save the delegation */
f597c537 1668 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1669 rcu_read_unlock();
fa332941 1670 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1671 if (!opendata->is_recover) {
1672 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1673 if (ret != 0)
1674 goto out;
1675 }
aac00a8d 1676 ret = -EAGAIN;
34310430
TM		 1677
1678 /* Try to update the stateid using the delegation */
dc0b027d 1679 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1680 goto out_return_state;
aac00a8d 1681 }
aac00a8d
TM		 1682out:
1683 return ERR_PTR(ret);
1684out_return_state:
1685 atomic_inc(&state->count);
1686 return state;
1687}
1688
e23008ec
AA		 1689static void
1690nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1691{
1692 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1693 struct nfs_delegation *delegation;
1694 int delegation_flags = 0;
1695
1696 rcu_read_lock();
1697 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1698 if (delegation)
1699 delegation_flags = delegation->flags;
1700 rcu_read_unlock();
72d79ff8
TM		 1701 switch (data->o_arg.claim) {
1702 default:
1703 break;
1704 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1705 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
e23008ec
AA		 1706 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1707 "returning a delegation for "
1708 "OPEN(CLAIM_DELEGATE_CUR)\n",
1709 clp->cl_hostname);
72d79ff8
TM		 1710 return;
1711 }
1712 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
e23008ec
AA		 1713 nfs_inode_set_delegation(state->inode,
1714 data->owner->so_cred,
1715 &data->o_res);
1716 else
1717 nfs_inode_reclaim_delegation(state->inode,
1718 data->owner->so_cred,
1719 &data->o_res);
1720}
1721
1722/*
1723 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1724 * and update the nfs4_state.
1725 */
1726static struct nfs4_state *
1727_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1728{
1729 struct inode *inode = data->state->inode;
1730 struct nfs4_state *state = data->state;
1731 int ret;
1732
d2bfda2e
WAA		 1733 if (!data->rpc_done) {
1734 if (data->rpc_status) {
1735 ret = data->rpc_status;
1736 goto err;
1737 }
1738 /* cached opens have already been processed */
1739 goto update;
e23008ec
AA		 1740 }
1741
e23008ec
AA		 1742 ret = nfs_refresh_inode(inode, &data->f_attr);
1743 if (ret)
1744 goto err;
1745
1746 if (data->o_res.delegation_type != 0)
1747 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1748update:
e23008ec
AA		 1749 update_open_stateid(state, &data->o_res.stateid, NULL,
1750 data->o_arg.fmode);
d49f042a 1751 atomic_inc(&state->count);
e23008ec
AA		 1752
1753 return state;
1754err:
1755 return ERR_PTR(ret);
1756
1757}
1758
1759static struct nfs4_state *
1760_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1761{
1762 struct inode *inode;
1763 struct nfs4_state *state = NULL;
1b370bc2 1764 int ret;
24ac23ab 1765
aac00a8d 1766 if (!data->rpc_done) {
6ee41268 1767 state = nfs4_try_open_cached(data);
9759b0fb 1768 trace_nfs4_cached_open(data->state);
aac00a8d
TM		 1769 goto out;
1770 }
1771
1b370bc2 1772 ret = -EAGAIN;
24ac23ab 1773 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1774 goto err;
1775fd3e 1775 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1776 ret = PTR_ERR(inode);
03f28e3a 1777 if (IS_ERR(inode))
1b370bc2
TM		 1778 goto err;
1779 ret = -ENOMEM;
24ac23ab
TM		 1780 state = nfs4_get_open_state(inode, data->owner);
1781 if (state == NULL)
1b370bc2 1782 goto err_put_inode;
e23008ec
AA		 1783 if (data->o_res.delegation_type != 0)
1784 nfs4_opendata_check_deleg(data, state);
34310430 1785 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1786 data->o_arg.fmode);
24ac23ab 1787 iput(inode);
aac00a8d 1788out:
7aa262b5 1789 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1790 return state;
1b370bc2
TM		 1791err_put_inode:
1792 iput(inode);
1793err:
1794 return ERR_PTR(ret);
24ac23ab
TM		 1795}
1796
e23008ec
AA		 1797static struct nfs4_state *
1798nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1799{
2e80dbe7
TM		 1800 struct nfs4_state *ret;
1801
e23008ec 1802 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
2e80dbe7
TM		 1803 ret =_nfs4_opendata_reclaim_to_nfs4_state(data);
1804 else
1805 ret = _nfs4_opendata_to_nfs4_state(data);
1806 nfs4_sequence_free_slot(&data->o_res.seq_res);
1807 return ret;
e23008ec
AA		 1808}
1809
864472e9
TM		 1810static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1811{
1812 struct nfs_inode *nfsi = NFS_I(state->inode);
1813 struct nfs_open_context *ctx;
1814
1815 spin_lock(&state->inode->i_lock);
1816 list_for_each_entry(ctx, &nfsi->open_files, list) {
1817 if (ctx->state != state)
1818 continue;
1819 get_nfs_open_context(ctx);
1820 spin_unlock(&state->inode->i_lock);
1821 return ctx;
1822 }
1823 spin_unlock(&state->inode->i_lock);
1824 return ERR_PTR(-ENOENT);
1825}
1826
4a1c0893
TM		 1827static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1828 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1829{
1830 struct nfs4_opendata *opendata;
1831
4a1c0893 1832 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1833 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1834 if (opendata == NULL)
1835 return ERR_PTR(-ENOMEM);
1836 opendata->state = state;
1837 atomic_inc(&state->count);
1838 return opendata;
1839}
1840
24311f88
TM		 1841static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1842 fmode_t fmode)
864472e9 1843{
2ced46c2 1844 struct nfs4_state *newstate;
864472e9
TM		 1845 int ret;
1846
24311f88 1847 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
39f897fd 1848 return 0;
dc0b027d
TM		 1849 opendata->o_arg.open_flags = 0;
1850 opendata->o_arg.fmode = fmode;
be36e185
TM		 1851 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1852 NFS_SB(opendata->dentry->d_sb),
1853 fmode, 0);
2ced46c2
TM		 1854 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1855 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1856 nfs4_init_opendata_res(opendata);
b257957e 1857 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1858 if (ret != 0)
1859 return ret;
2ced46c2 1860 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1861 if (IS_ERR(newstate))
1862 return PTR_ERR(newstate);
24311f88
TM		 1863 if (newstate != opendata->state)
1864 ret = -ESTALE;
643168c2 1865 nfs4_close_state(newstate, fmode);
24311f88 1866 return ret;
864472e9
TM		 1867}
1868
1869static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1870{
864472e9
TM		 1871 int ret;
1872
4f14c194
TM		 1873 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1874 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1875 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1876 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1877 /* memory barrier prior to reading state->n_* */
2ced46c2 1878 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1879 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9 1880 smp_rmb();
24311f88
TM		 1881 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1882 if (ret != 0)
1883 return ret;
1884 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1885 if (ret != 0)
1886 return ret;
1887 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1888 if (ret != 0)
1889 return ret;
1ac7e2fd
TM		 1890 /*
1891 * We may have performed cached opens for all three recoveries.
1892 * Check if we need to update the current stateid.
1893 */
1894 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1895 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1896 write_seqlock(&state->seqlock);
1ac7e2fd 1897 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1898 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1899 write_sequnlock(&state->seqlock);
1ac7e2fd 1900 }
864472e9
TM		 1901 return 0;
1902}
1903
1da177e4
LT		 1904/*
1905 * OPEN_RECLAIM:
1906 * reclaim state on the server after a reboot.
1da177e4 1907 */
539cd03a 1908static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1909{
1ac7e2fd 1910 struct nfs_delegation *delegation;
864472e9 1911 struct nfs4_opendata *opendata;
dc0b027d 1912 fmode_t delegation_type = 0;
1da177e4
LT		 1913 int status;
1914
4a1c0893
TM		 1915 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1916 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1917 if (IS_ERR(opendata))
1918 return PTR_ERR(opendata);
1ac7e2fd
TM		 1919 rcu_read_lock();
1920 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1921 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1922 delegation_type = delegation->type;
1ac7e2fd 1923 rcu_read_unlock();
864472e9
TM		 1924 opendata->o_arg.u.delegation_type = delegation_type;
1925 status = nfs4_open_recover(opendata, state);
c6d00e63 1926 nfs4_opendata_put(opendata);
1da177e4
LT		 1927 return status;
1928}
1929
539cd03a 1930static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1931{
1932 struct nfs_server *server = NFS_SERVER(state->inode);
1933 struct nfs4_exception exception = { };
1934 int err;
1935 do {
539cd03a 1936 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1937 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1938 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1939 continue;
168667c4 1940 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1941 break;
1942 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1943 } while (exception.retry);
1944 return err;
1945}
1946
864472e9
TM		 1947static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1948{
1949 struct nfs_open_context *ctx;
1950 int ret;
1951
1952 ctx = nfs4_state_find_open_context(state);
1953 if (IS_ERR(ctx))
91876b13 1954 return -EAGAIN;
539cd03a 1955 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1956 put_nfs_open_context(ctx);
1957 return ret;
1958}
1959
db4f2e63 1960static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1961{
be76b5b6
TM		 1962 switch (err) {
1963 default:
1964 printk(KERN_ERR "NFS: %s: unhandled error "
1965 "%d.\n", __func__, err);
1966 case 0:
1967 case -ENOENT:
8eee52af 1968 case -EAGAIN:
be76b5b6
TM		 1969 case -ESTALE:
1970 break;
1971 case -NFS4ERR_BADSESSION:
1972 case -NFS4ERR_BADSLOT:
1973 case -NFS4ERR_BAD_HIGH_SLOT:
1974 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1975 case -NFS4ERR_DEADSESSION:
1976 set_bit(NFS_DELEGATED_STATE, &state->flags);
1977 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1978 return -EAGAIN;
1979 case -NFS4ERR_STALE_CLIENTID:
1980 case -NFS4ERR_STALE_STATEID:
1981 set_bit(NFS_DELEGATED_STATE, &state->flags);
be76b5b6
TM		 1982 /* Don't recall a delegation if it was lost */
1983 nfs4_schedule_lease_recovery(server->nfs_client);
1984 return -EAGAIN;
352297b9
CL		 1985 case -NFS4ERR_MOVED:
1986 nfs4_schedule_migration_recovery(server);
1987 return -EAGAIN;
8ef2f8d4
CL		 1988 case -NFS4ERR_LEASE_MOVED:
1989 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1990 return -EAGAIN;
be76b5b6
TM		 1991 case -NFS4ERR_DELEG_REVOKED:
1992 case -NFS4ERR_ADMIN_REVOKED:
404ea356 1993 case -NFS4ERR_EXPIRED:
be76b5b6 1994 case -NFS4ERR_BAD_STATEID:
db4f2e63 1995 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1996 nfs_inode_find_state_and_recover(state->inode,
1997 stateid);
1998 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1999 return -EAGAIN;
be76b5b6
TM		 2000 case -NFS4ERR_DELAY:
2001 case -NFS4ERR_GRACE:
2002 set_bit(NFS_DELEGATED_STATE, &state->flags);
2003 ssleep(1);
2004 return -EAGAIN;
db4f2e63
TM		 2005 case -ENOMEM:
2006 case -NFS4ERR_DENIED:
2007 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
2008 return 0;
be76b5b6 2009 }
1da177e4
LT		 2010 return err;
2011}
2012
24311f88
TM		 2013int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
2014 struct nfs4_state *state, const nfs4_stateid *stateid,
2015 fmode_t type)
db4f2e63
TM		 2016{
2017 struct nfs_server *server = NFS_SERVER(state->inode);
2018 struct nfs4_opendata *opendata;
24311f88 2019 int err = 0;
db4f2e63
TM		 2020
2021 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2022 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
2023 if (IS_ERR(opendata))
2024 return PTR_ERR(opendata);
2025 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
5e99b532
JL		 2026 write_seqlock(&state->seqlock);
2027 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2028 write_sequnlock(&state->seqlock);
24311f88
TM		 2029 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2030 switch (type & (FMODE_READ|FMODE_WRITE)) {
2031 case FMODE_READ|FMODE_WRITE:
2032 case FMODE_WRITE:
2033 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
2034 if (err)
2035 break;
2036 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
2037 if (err)
2038 break;
2039 case FMODE_READ:
2040 err = nfs4_open_recover_helper(opendata, FMODE_READ);
2041 }
db4f2e63
TM		 2042 nfs4_opendata_put(opendata);
2043 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
2044}
2045
be05c860
CL		 2046static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
2047{
2048 struct nfs4_opendata *data = calldata;
2049
cb04ad2a
PT		 2050 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
2051 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 2052}
2053
cdd4e68b
TM		 2054static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
2055{
2056 struct nfs4_opendata *data = calldata;
2057
17ead6c8 2058 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 2059
cdd4e68b 2060 data->rpc_status = task->tk_status;
26e976a8 2061 if (data->rpc_status == 0) {
f597c537 2062 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 2063 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 2064 renew_lease(data->o_res.server, data->timestamp);
3e309914 2065 data->rpc_done = 1;
26e976a8 2066 }
cdd4e68b
TM		 2067}
2068
2069static void nfs4_open_confirm_release(void *calldata)
2070{
2071 struct nfs4_opendata *data = calldata;
2072 struct nfs4_state *state = NULL;
2073
2074 /* If this request hasn't been cancelled, do nothing */
2075 if (data->cancelled == 0)
2076 goto out_free;
2077 /* In case of error, no cleanup! */
3e309914 2078 if (!data->rpc_done)
cdd4e68b 2079 goto out_free;
cdd4e68b 2080 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2081 if (!IS_ERR(state))
643168c2 2082 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 2083out_free:
c6d00e63 2084 nfs4_opendata_put(data);
cdd4e68b
TM		 2085}
2086
2087static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 2088 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 2089 .rpc_call_done = nfs4_open_confirm_done,
2090 .rpc_release = nfs4_open_confirm_release,
2091};
2092
2093/*
2094 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
2095 */
2096static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
2097{
2b0143b5 2098 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 2099 struct rpc_task *task;
5138fde0
TM		 2100 struct rpc_message msg = {
2101 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
2102 .rpc_argp = &data->c_arg,
2103 .rpc_resp = &data->c_res,
2104 .rpc_cred = data->owner->so_cred,
2105 };
c970aa85
TM		 2106 struct rpc_task_setup task_setup_data = {
2107 .rpc_client = server->client,
5138fde0 2108 .rpc_message = &msg,
c970aa85
TM		 2109 .callback_ops = &nfs4_open_confirm_ops,
2110 .callback_data = data,
101070ca 2111 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2112 .flags = RPC_TASK_ASYNC,
2113 };
1da177e4
LT		 2114 int status;
2115
17ead6c8 2116 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 2117 kref_get(&data->kref);
3e309914
TM		 2118 data->rpc_done = 0;
2119 data->rpc_status = 0;
5138fde0 2120 data->timestamp = jiffies;
e92c1e0d
BC		 2121 if (data->is_recover)
2122 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
c970aa85 2123 task = rpc_run_task(&task_setup_data);
7a1218a2 2124 if (IS_ERR(task))
cdd4e68b 2125 return PTR_ERR(task);
cdd4e68b
TM		 2126 status = nfs4_wait_for_completion_rpc_task(task);
2127 if (status != 0) {
2128 data->cancelled = 1;
2129 smp_wmb();
2130 } else
2131 status = data->rpc_status;
e6b3c4db 2132 rpc_put_task(task);
1da177e4
LT		 2133 return status;
2134}
2135
24ac23ab 2136static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 2137{
24ac23ab
TM		 2138 struct nfs4_opendata *data = calldata;
2139 struct nfs4_state_owner *sp = data->owner;
549b19cc 2140 struct nfs_client *clp = sp->so_server->nfs_client;
2a606188 2141 enum open_claim_type4 claim = data->o_arg.claim;
5138fde0 2142
24ac23ab 2143 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 2144 goto out_wait;
aac00a8d
TM		 2145 /*
2146 * Check if we still need to send an OPEN call, or if we can use
2147 * a delegation instead.
2148 */
2149 if (data->state != NULL) {
2150 struct nfs_delegation *delegation;
2151
dc0b027d 2152 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 2153 goto out_no_action;
aac00a8d
TM		 2154 rcu_read_lock();
2155 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2a606188 2156 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
652f89f6 2157 goto unlock_no_action;
aac00a8d
TM		 2158 rcu_read_unlock();
2159 }
95b72eb0 2160 /* Update client id. */
549b19cc 2161 data->o_arg.clientid = clp->cl_clientid;
2a606188
TM		 2162 switch (claim) {
2163 default:
2164 break;
8188df17
TM		 2165 case NFS4_OPEN_CLAIM_PREVIOUS:
2166 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2167 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 2168 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 2169 case NFS4_OPEN_CLAIM_FH:
2170 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 2171 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
2172 }
26e976a8 2173 data->timestamp = jiffies;
035168ab 2174 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 2175 &data->o_arg.seq_args,
2240a9e2
TM		 2176 &data->o_res.seq_res,
2177 task) != 0)
2178 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 2179
2180 /* Set the create mode (note dependency on the session type) */
2181 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2182 if (data->o_arg.open_flags & O_EXCL) {
2183 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2184 if (nfs4_has_persistent_session(clp))
2185 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2186 else if (clp->cl_mvops->minor_version > 0)
2187 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2188 }
6ee41268 2189 return;
652f89f6 2190unlock_no_action:
9759b0fb 2191 trace_nfs4_cached_open(data->state);
652f89f6 2192 rcu_read_unlock();
6ee41268
TM		 2193out_no_action:
2194 task->tk_action = NULL;
c8da19b9 2195out_wait:
b75ad4cd 2196 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 2197}
2198
24ac23ab
TM		 2199static void nfs4_open_done(struct rpc_task *task, void *calldata)
2200{
2201 struct nfs4_opendata *data = calldata;
1da177e4 2202
24ac23ab 2203 data->rpc_status = task->tk_status;
d898528c 2204
2e80dbe7 2205 if (!nfs4_sequence_process(task, &data->o_res.seq_res))
14516c3a 2206 return;
d898528c 2207
24ac23ab 2208 if (task->tk_status == 0) {
807d66d8
TM		 2209 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2210 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 2211 case S_IFREG:
2212 break;
2213 case S_IFLNK:
24ac23ab 2214 data->rpc_status = -ELOOP;
6f926b5b
TM		 2215 break;
2216 case S_IFDIR:
24ac23ab 2217 data->rpc_status = -EISDIR;
6f926b5b
TM		 2218 break;
2219 default:
24ac23ab 2220 data->rpc_status = -ENOTDIR;
807d66d8 2221 }
6f926b5b 2222 }
26e976a8 2223 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 2224 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2225 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 2226 }
3e309914 2227 data->rpc_done = 1;
24ac23ab 2228}
6f926b5b 2229
24ac23ab
TM		 2230static void nfs4_open_release(void *calldata)
2231{
2232 struct nfs4_opendata *data = calldata;
2233 struct nfs4_state *state = NULL;
2234
2235 /* If this request hasn't been cancelled, do nothing */
2236 if (data->cancelled == 0)
2237 goto out_free;
2238 /* In case of error, no cleanup! */
3e309914 2239 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 2240 goto out_free;
2241 /* In case we need an open_confirm, no cleanup! */
2242 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2243 goto out_free;
24ac23ab 2244 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2245 if (!IS_ERR(state))
643168c2 2246 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 2247out_free:
c6d00e63 2248 nfs4_opendata_put(data);
24ac23ab
TM		 2249}
2250
2251static const struct rpc_call_ops nfs4_open_ops = {
2252 .rpc_call_prepare = nfs4_open_prepare,
2253 .rpc_call_done = nfs4_open_done,
2254 .rpc_release = nfs4_open_release,
2255};
2256
b257957e 2257static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab 2258{
2b0143b5 2259 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 2260 struct nfs_server *server = NFS_SERVER(dir);
2261 struct nfs_openargs *o_arg = &data->o_arg;
2262 struct nfs_openres *o_res = &data->o_res;
2263 struct rpc_task *task;
5138fde0
TM		 2264 struct rpc_message msg = {
2265 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2266 .rpc_argp = o_arg,
2267 .rpc_resp = o_res,
2268 .rpc_cred = data->owner->so_cred,
2269 };
c970aa85
TM		 2270 struct rpc_task_setup task_setup_data = {
2271 .rpc_client = server->client,
5138fde0 2272 .rpc_message = &msg,
c970aa85
TM		 2273 .callback_ops = &nfs4_open_ops,
2274 .callback_data = data,
101070ca 2275 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2276 .flags = RPC_TASK_ASYNC,
2277 };
24ac23ab
TM		 2278 int status;
2279
a9c92d6b 2280 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 2281 kref_get(&data->kref);
3e309914
TM		 2282 data->rpc_done = 0;
2283 data->rpc_status = 0;
2ced46c2 2284 data->cancelled = 0;
bdeca1b7
TM		 2285 data->is_recover = 0;
2286 if (isrecover) {
8fe72bac 2287 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 2288 data->is_recover = 1;
2289 }
c970aa85 2290 task = rpc_run_task(&task_setup_data);
b257957e
AB		 2291 if (IS_ERR(task))
2292 return PTR_ERR(task);
2293 status = nfs4_wait_for_completion_rpc_task(task);
2294 if (status != 0) {
2295 data->cancelled = 1;
2296 smp_wmb();
2297 } else
2298 status = data->rpc_status;
2299 rpc_put_task(task);
2300
2301 return status;
2302}
2303
2304static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2305{
2b0143b5 2306 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2307 struct nfs_openres *o_res = &data->o_res;
2308 int status;
2309
2310 status = nfs4_run_open_task(data, 1);
2311 if (status != 0 || !data->rpc_done)
2312 return status;
2313
6926afd1
TM		 2314 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2315
b257957e
AB		 2316 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2317 status = _nfs4_proc_open_confirm(data);
2318 if (status != 0)
2319 return status;
2320 }
2321
2322 return status;
2323}
2324
f3792d63
TM		 2325/*
2326 * Additional permission checks in order to distinguish between an
2327 * open for read, and an open for execute. This works around the
2328 * fact that NFSv4 OPEN treats read and execute permissions as being
2329 * the same.
2330 * Note that in the non-execute case, we want to turn off permission
2331 * checking if we just created a new file (POSIX open() semantics).
2332 */
6168f62c
WAA		 2333static int nfs4_opendata_access(struct rpc_cred *cred,
2334 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2335 struct nfs4_state *state, fmode_t fmode,
2336 int openflags)
6168f62c
WAA		 2337{
2338 struct nfs_access_entry cache;
2339 u32 mask;
2340
2341 /* access call failed or for some reason the server doesn't
2342 * support any access modes -- defer access call until later */
2343 if (opendata->o_res.access_supported == 0)
2344 return 0;
2345
2346 mask = 0;
f3792d63
TM		 2347 /*
2348 * Use openflags to check for exec, because fmode won't
2349 * always have FMODE_EXEC set when file open for exec.
2350 */
f8d9a897
WAA		 2351 if (openflags & __FMODE_EXEC) {
2352 /* ONLY check for exec rights */
2353 mask = MAY_EXEC;
f3792d63 2354 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2355 mask = MAY_READ;
6168f62c
WAA		 2356
2357 cache.cred = cred;
2358 cache.jiffies = jiffies;
2359 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2360 nfs_access_add_cache(state->inode, &cache);
2361
bbd3a8ee 2362 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2363 return 0;
2364
2365 /* even though OPEN succeeded, access is denied. Close the file */
2366 nfs4_close_state(state, fmode);
998f40b5 2367 return -EACCES;
6168f62c
WAA		 2368}
2369
b257957e
AB		 2370/*
2371 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2372 */
2373static int _nfs4_proc_open(struct nfs4_opendata *data)
2374{
2b0143b5 2375 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2376 struct nfs_server *server = NFS_SERVER(dir);
2377 struct nfs_openargs *o_arg = &data->o_arg;
2378 struct nfs_openres *o_res = &data->o_res;
2379 int status;
2380
2381 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2382 if (!data->rpc_done)
2383 return status;
2384 if (status != 0) {
2385 if (status == -NFS4ERR_BADNAME &&
2386 !(o_arg->open_flags & O_CREAT))
2387 return -ENOENT;
24ac23ab 2388 return status;
08ef7bd3 2389 }
24ac23ab 2390
6926afd1
TM		 2391 nfs_fattr_map_and_free_names(server, &data->f_attr);
2392
5bc2afc2 2393 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2394 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2395 if (o_arg->open_flags & O_EXCL)
2396 data->file_created = 1;
2397 else if (o_res->cinfo.before != o_res->cinfo.after)
2398 data->file_created = 1;
2399 }
0df5dd4a
TM		 2400 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2401 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2402 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2403 status = _nfs4_proc_open_confirm(data);
1da177e4 2404 if (status != 0)
24ac23ab 2405 return status;
1da177e4
LT		 2406 }
2407 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2408 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2409 return 0;
1da177e4
LT		 2410}
2411
d83217c1
AA		 2412static int nfs4_recover_expired_lease(struct nfs_server *server)
2413{
2414 return nfs4_client_recover_expired_lease(server->nfs_client);
2415}
2416
1da177e4
LT		 2417/*
2418 * OPEN_EXPIRED:
2419 * reclaim state on the server after a network partition.
2420 * Assumes caller holds the appropriate lock
2421 */
539cd03a 2422static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2423{
e56e0b78 2424 struct nfs4_opendata *opendata;
864472e9 2425 int ret;
1da177e4 2426
4a1c0893 2427 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2428 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2429 if (IS_ERR(opendata))
2430 return PTR_ERR(opendata);
864472e9 2431 ret = nfs4_open_recover(opendata, state);
35d05778 2432 if (ret == -ESTALE)
3d4ff43d 2433 d_drop(ctx->dentry);
c6d00e63 2434 nfs4_opendata_put(opendata);
864472e9 2435 return ret;
1da177e4
LT		 2436}
2437
a9ed2e25 2438static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2439{
539cd03a 2440 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2441 struct nfs4_exception exception = { };
2442 int err;
2443
2444 do {
539cd03a 2445 err = _nfs4_open_expired(ctx, state);
42113a75 2446 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2447 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2448 continue;
a9ed2e25
TM		 2449 switch (err) {
2450 default:
2451 goto out;
2452 case -NFS4ERR_GRACE:
2453 case -NFS4ERR_DELAY:
2454 nfs4_handle_exception(server, err, &exception);
2455 err = 0;
2456 }
202b50dc 2457 } while (exception.retry);
a9ed2e25 2458out:
202b50dc
TM		 2459 return err;
2460}
2461
1da177e4
LT		 2462static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2463{
1da177e4 2464 struct nfs_open_context *ctx;
864472e9 2465 int ret;
1da177e4 2466
864472e9
TM		 2467 ctx = nfs4_state_find_open_context(state);
2468 if (IS_ERR(ctx))
91876b13 2469 return -EAGAIN;
539cd03a 2470 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2471 put_nfs_open_context(ctx);
2472 return ret;
1da177e4
LT		 2473}
2474
41020b67
TM		 2475static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
2476 const nfs4_stateid *stateid)
4dfd4f7a 2477{
41020b67 2478 nfs_remove_bad_delegation(state->inode, stateid);
4dfd4f7a
TM		 2479 write_seqlock(&state->seqlock);
2480 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2481 write_sequnlock(&state->seqlock);
2482 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2483}
2484
2485static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2486{
2487 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
41020b67 2488 nfs_finish_clear_delegation_stateid(state, NULL);
4dfd4f7a
TM		 2489}
2490
2491static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2492{
2493 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2494 nfs40_clear_delegation_stateid(state);
2495 return nfs4_open_expired(sp, state);
2496}
2497
45870d69
TM		 2498static int nfs40_test_and_free_expired_stateid(struct nfs_server *server,
2499 nfs4_stateid *stateid,
2500 struct rpc_cred *cred)
2501{
2502 return -NFS4ERR_BAD_STATEID;
2503}
2504
f062eb6c 2505#if defined(CONFIG_NFS_V4_1)
4586f6e2
TM		 2506static int nfs41_test_and_free_expired_stateid(struct nfs_server *server,
2507 nfs4_stateid *stateid,
2508 struct rpc_cred *cred)
2509{
2510 int status;
2511
f7a62ada
TM		 2512 switch (stateid->type) {
2513 default:
2514 break;
2515 case NFS4_INVALID_STATEID_TYPE:
2516 case NFS4_SPECIAL_STATEID_TYPE:
2517 return -NFS4ERR_BAD_STATEID;
2518 case NFS4_REVOKED_STATEID_TYPE:
2519 goto out_free;
2520 }
4586f6e2 2521
f7a62ada 2522 status = nfs41_test_stateid(server, stateid, cred);
4586f6e2
TM		 2523 switch (status) {
2524 case -NFS4ERR_EXPIRED:
2525 case -NFS4ERR_ADMIN_REVOKED:
2526 case -NFS4ERR_DELEG_REVOKED:
f7a62ada
TM		 2527 break;
2528 default:
4586f6e2
TM		 2529 return status;
2530 }
f7a62ada
TM		 2531out_free:
2532 /* Ack the revoked state to the server */
f0b0bf88 2533 nfs41_free_stateid(server, stateid, cred, true);
f7a62ada 2534 return -NFS4ERR_EXPIRED;
4586f6e2
TM		 2535}
2536
0c116cad 2537static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2538{
f062eb6c 2539 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2540 nfs4_stateid stateid;
ab7cb0df 2541 struct nfs_delegation *delegation;
0c116cad
TM		 2542 struct rpc_cred *cred;
2543 int status;
3e60ffdd 2544
ab7cb0df
TM		 2545 /* Get the delegation credential for use by test/free_stateid */
2546 rcu_read_lock();
2547 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2548 if (delegation == NULL) {
ab7cb0df 2549 rcu_read_unlock();
0c116cad
TM		 2550 return;
2551 }
2552
2553 nfs4_stateid_copy(&stateid, &delegation->stateid);
4c8e5447
TM		 2554 if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags)) {
2555 rcu_read_unlock();
41020b67 2556 nfs_finish_clear_delegation_stateid(state, &stateid);
4c8e5447
TM		 2557 return;
2558 }
0c116cad 2559
63d63cbf
TM		 2560 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED, &delegation->flags)) {
2561 rcu_read_unlock();
2562 return;
2563 }
2564
0c116cad
TM		 2565 cred = get_rpccred(delegation->cred);
2566 rcu_read_unlock();
4586f6e2 2567 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
0c116cad 2568 trace_nfs4_test_delegation_stateid(state, NULL, status);
f7a62ada 2569 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID)
41020b67 2570 nfs_finish_clear_delegation_stateid(state, &stateid);
ab7cb0df 2571
0c116cad 2572 put_rpccred(cred);
3e60ffdd
CL		 2573}
2574
c5896fc8
TM		 2575/**
2576 * nfs41_check_expired_locks - possibly free a lock stateid
2577 *
2578 * @state: NFSv4 state for an inode
2579 *
2580 * Returns NFS_OK if recovery for this stateid is now finished.
2581 * Otherwise a negative NFS4ERR value is returned.
2582 */
2583static int nfs41_check_expired_locks(struct nfs4_state *state)
2584{
2585 int status, ret = NFS_OK;
d75a6a0e 2586 struct nfs4_lock_state *lsp, *prev = NULL;
c5896fc8
TM		 2587 struct nfs_server *server = NFS_SERVER(state->inode);
2588
2589 if (!test_bit(LK_STATE_IN_USE, &state->flags))
2590 goto out;
d75a6a0e
BC		 2591
2592 spin_lock(&state->state_lock);
c5896fc8
TM		 2593 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
2594 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
2595 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
2596
d75a6a0e
BC		 2597 atomic_inc(&lsp->ls_count);
2598 spin_unlock(&state->state_lock);
2599
2600 nfs4_put_lock_state(prev);
2601 prev = lsp;
2602
c5896fc8
TM		 2603 status = nfs41_test_and_free_expired_stateid(server,
2604 &lsp->ls_stateid,
2605 cred);
2606 trace_nfs4_test_lock_stateid(state, lsp, status);
2607 if (status == -NFS4ERR_EXPIRED ||
2608 status == -NFS4ERR_BAD_STATEID) {
2609 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
67dd4830 2610 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE;
c5896fc8
TM		 2611 if (!recover_lost_locks)
2612 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2613 } else if (status != NFS_OK) {
2614 ret = status;
d75a6a0e
BC		 2615 nfs4_put_lock_state(prev);
2616 goto out;
c5896fc8 2617 }
d75a6a0e 2618 spin_lock(&state->state_lock);
c5896fc8 2619 }
d75a6a0e
BC		 2620 }
2621 spin_unlock(&state->state_lock);
2622 nfs4_put_lock_state(prev);
c5896fc8
TM		 2623out:
2624 return ret;
2625}
2626
3e60ffdd
CL		 2627/**
2628 * nfs41_check_open_stateid - possibly free an open stateid
2629 *
2630 * @state: NFSv4 state for an inode
2631 *
2632 * Returns NFS_OK if recovery for this stateid is now finished.
2633 * Otherwise a negative NFS4ERR value is returned.
2634 */
2635static int nfs41_check_open_stateid(struct nfs4_state *state)
2636{
2637 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2638 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2639 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2640 int status;
2641
b134fc4a 2642 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) {
8a64c4ef
TM		 2643 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) {
2644 if (nfs4_have_delegation(state->inode, state->state))
2645 return NFS_OK;
2646 return -NFS4ERR_OPENMODE;
2647 }
3e60ffdd 2648 return -NFS4ERR_BAD_STATEID;
b134fc4a 2649 }
4586f6e2 2650 status = nfs41_test_and_free_expired_stateid(server, stateid, cred);
08cb47fa 2651 trace_nfs4_test_open_stateid(state, NULL, status);
f7a62ada 2652 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) {
3e60ffdd
CL		 2653 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2654 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2655 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2656 clear_bit(NFS_OPEN_STATE, &state->flags);
67dd4830 2657 stateid->type = NFS4_INVALID_STATEID_TYPE;
b01dd1d8 2658 }
8a64c4ef
TM		 2659 if (status != NFS_OK)
2660 return status;
2661 if (nfs_open_stateid_recover_openmode(state))
2662 return -NFS4ERR_OPENMODE;
2663 return NFS_OK;
b01dd1d8
BS		 2664}
2665
2666static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2667{
eb64cf96 2668 int status;
b01dd1d8 2669
0c116cad 2670 nfs41_check_delegation_stateid(state);
c5896fc8
TM		 2671 status = nfs41_check_expired_locks(state);
2672 if (status != NFS_OK)
2673 return status;
3e60ffdd 2674 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2675 if (status != NFS_OK)
2676 status = nfs4_open_expired(sp, state);
2677 return status;
f062eb6c
BS		 2678}
2679#endif
2680
aa53ed54
JL		 2681/*
2682 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2683 * fields corresponding to attributes that were used to store the verifier.
2684 * Make sure we clobber those fields in the later setattr call
2685 */
5334c5bd
KM		 2686static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2687 struct iattr *sattr, struct nfs4_label **label)
aa53ed54 2688{
5334c5bd
KM		 2689 const u32 *attrset = opendata->o_res.attrset;
2690
2691 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
aa53ed54
JL		 2692 !(sattr->ia_valid & ATTR_ATIME_SET))
2693 sattr->ia_valid |= ATTR_ATIME;
2694
5334c5bd 2695 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
aa53ed54
JL		 2696 !(sattr->ia_valid & ATTR_MTIME_SET))
2697 sattr->ia_valid |= ATTR_MTIME;
5334c5bd
KM		 2698
2699 /* Except MODE, it seems harmless of setting twice. */
2700 if ((attrset[1] & FATTR4_WORD1_MODE))
2701 sattr->ia_valid &= ~ATTR_MODE;
2702
2703 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2704 *label = NULL;
aa53ed54
JL		 2705}
2706
c21443c2
TM		 2707static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2708 fmode_t fmode,
2709 int flags,
3efb9722 2710 struct nfs_open_context *ctx)
c21443c2
TM		 2711{
2712 struct nfs4_state_owner *sp = opendata->owner;
2713 struct nfs_server *server = sp->so_server;
275bb307 2714 struct dentry *dentry;
c21443c2
TM		 2715 struct nfs4_state *state;
2716 unsigned int seq;
2717 int ret;
2718
2719 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2720
2721 ret = _nfs4_proc_open(opendata);
dca78001 2722 if (ret != 0)
c21443c2
TM		 2723 goto out;
2724
2725 state = nfs4_opendata_to_nfs4_state(opendata);
2726 ret = PTR_ERR(state);
2727 if (IS_ERR(state))
2728 goto out;
2729 if (server->caps & NFS_CAP_POSIX_LOCK)
2730 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
a8ce377a
JL		 2731 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
2732 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
c21443c2 2733
275bb307 2734 dentry = opendata->dentry;
2b0143b5 2735 if (d_really_is_negative(dentry)) {
668d0cd5 2736 struct dentry *alias;
275bb307 2737 d_drop(dentry);
668d0cd5
AV		 2738 alias = d_exact_alias(dentry, state->inode);
2739 if (!alias)
2740 alias = d_splice_alias(igrab(state->inode), dentry);
2741 /* d_splice_alias() can't fail here - it's a non-directory */
2742 if (alias) {
275bb307 2743 dput(ctx->dentry);
668d0cd5 2744 ctx->dentry = dentry = alias;
275bb307
TM		 2745 }
2746 nfs_set_verifier(dentry,
2b0143b5 2747 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2748 }
2749
c21443c2
TM		 2750 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2751 if (ret != 0)
2752 goto out;
2753
3efb9722 2754 ctx->state = state;
2b0143b5 2755 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2756 nfs_inode_attach_open_context(ctx);
2757 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2758 nfs4_schedule_stateid_recovery(server, state);
2759 }
c21443c2
TM		 2760out:
2761 return ret;
2762}
2763
1da177e4 2764/*
24ac23ab 2765 * Returns a referenced nfs4_state
1da177e4 2766 */
82be417a 2767static int _nfs4_do_open(struct inode *dir,
4197a055 2768 struct nfs_open_context *ctx,
82be417a
AA		 2769 int flags,
2770 struct iattr *sattr,
5bc2afc2
TM		 2771 struct nfs4_label *label,
2772 int *opened)
1da177e4
LT		 2773{
2774 struct nfs4_state_owner *sp;
2775 struct nfs4_state *state = NULL;
2776 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2777 struct nfs4_opendata *opendata;
4197a055
TM		 2778 struct dentry *dentry = ctx->dentry;
2779 struct rpc_cred *cred = ctx->cred;
2780 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2781 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2782 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2783 struct nfs4_label *olabel = NULL;
aac00a8d 2784 int status;
1da177e4
LT		 2785
2786 /* Protect against reboot recovery conflicts */
1da177e4 2787 status = -ENOMEM;
d1e284d5
TM		 2788 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2789 if (sp == NULL) {
1da177e4
LT		 2790 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2791 goto out_err;
2792 }
58d9714a
TM		 2793 status = nfs4_recover_expired_lease(server);
2794 if (status != 0)
b4454fe1 2795 goto err_put_state_owner;
2b0143b5
DH		 2796 if (d_really_is_positive(dentry))
2797 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2798 status = -ENOMEM;
2b0143b5 2799 if (d_really_is_positive(dentry))
49f9a0fa 2800 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2801 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2802 label, claim, GFP_KERNEL);
e56e0b78 2803 if (opendata == NULL)
95d35cb4 2804 goto err_put_state_owner;
1da177e4 2805
14c43f76
DQ		 2806 if (label) {
2807 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2808 if (IS_ERR(olabel)) {
2809 status = PTR_ERR(olabel);
2810 goto err_opendata_put;
2811 }
2812 }
2813
e911b815
TM		 2814 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2815 if (!opendata->f_attr.mdsthreshold) {
2816 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2817 if (!opendata->f_attr.mdsthreshold)
2818 goto err_free_label;
2819 }
1549210f 2820 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2821 }
2b0143b5
DH		 2822 if (d_really_is_positive(dentry))
2823 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2824
3efb9722 2825 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2826 if (status != 0)
14c43f76 2827 goto err_free_label;
3efb9722 2828 state = ctx->state;
6168f62c 2829
efcbc04e 2830 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 2831 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
5334c5bd 2832 nfs4_exclusive_attrset(opendata, sattr, &label);
a1d1c4f1
TM		 2833 /*
2834 * send create attributes which was not set by open
2835 * with an extra setattr.
2836 */
2837 if (sattr->ia_valid & NFS4_VALID_ATTRS) {
2838 nfs_fattr_init(opendata->o_res.f_attr);
2839 status = nfs4_do_setattr(state->inode, cred,
2840 opendata->o_res.f_attr, sattr,
29b59f94 2841 ctx, label, olabel);
a1d1c4f1
TM		 2842 if (status == 0) {
2843 nfs_setattr_update_inode(state->inode, sattr,
2844 opendata->o_res.f_attr);
2845 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2846 }
1775fd3e 2847 }
0ab64e0e 2848 }
c5c3fb5f 2849 if (opened && opendata->file_created)
5bc2afc2 2850 *opened |= FILE_CREATED;
82be417a 2851
e911b815 2852 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2853 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2854 opendata->f_attr.mdsthreshold = NULL;
2855 }
82be417a 2856
14c43f76
DQ		 2857 nfs4_label_free(olabel);
2858
c6d00e63 2859 nfs4_opendata_put(opendata);
1da177e4 2860 nfs4_put_state_owner(sp);
1da177e4 2861 return 0;
14c43f76
DQ		 2862err_free_label:
2863 nfs4_label_free(olabel);
c6d00e63
TM		 2864err_opendata_put:
2865 nfs4_opendata_put(opendata);
e56e0b78
TM		 2866err_put_state_owner:
2867 nfs4_put_state_owner(sp);
1da177e4 2868out_err:
1da177e4
LT		 2869 return status;
2870}
2871
2872
82be417a 2873static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2874 struct nfs_open_context *ctx,
82be417a
AA		 2875 int flags,
2876 struct iattr *sattr,
5bc2afc2
TM		 2877 struct nfs4_label *label,
2878 int *opened)
1da177e4 2879{
49f9a0fa 2880 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2881 struct nfs4_exception exception = { };
2882 struct nfs4_state *res;
2883 int status;
2884
2885 do {
5bc2afc2 2886 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2887 res = ctx->state;
42113a75 2888 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2889 if (status == 0)
2890 break;
2891 /* NOTE: BAD_SEQID means the server and client disagree about the
2892 * book-keeping w.r.t. state-changing operations
2893 * (OPEN/CLOSE/LOCK/LOCKU...)
2894 * It is actually a sign of a bug on the client or on the server.
2895 *
2896 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2897 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2898 * have unhashed the old state_owner for us, and that we can
2899 * therefore safely retry using a new one. We should still warn
2900 * the user though...
2901 */
2902 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2903 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2904 " returned a bad sequence-id error!\n",
2905 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2906 exception.retry = 1;
2907 continue;
2908 }
550f5747
TM		 2909 /*
2910 * BAD_STATEID on OPEN means that the server cancelled our
2911 * state before it received the OPEN_CONFIRM.
2912 * Recover by retrying the request as per the discussion
2913 * on Page 181 of RFC3530.
2914 */
2915 if (status == -NFS4ERR_BAD_STATEID) {
2916 exception.retry = 1;
2917 continue;
2918 }
aac00a8d
TM		 2919 if (status == -EAGAIN) {
2920 /* We must have found a delegation */
2921 exception.retry = 1;
2922 continue;
2923 }
49f9a0fa
TM		 2924 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2925 continue;
2926 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2927 status, &exception));
2928 } while (exception.retry);
2929 return res;
2930}
2931
8487c479
TM		 2932static int _nfs4_do_setattr(struct inode *inode,
2933 struct nfs_setattrargs *arg,
2934 struct nfs_setattrres *res,
2935 struct rpc_cred *cred,
29b59f94 2936 struct nfs_open_context *ctx)
1da177e4 2937{
3e4f6290 2938 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2939 struct rpc_message msg = {
659bfcd6 2940 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
8487c479
TM		 2941 .rpc_argp = arg,
2942 .rpc_resp = res,
659bfcd6 2943 .rpc_cred = cred,
1da177e4 2944 };
abf4e13c 2945 struct rpc_cred *delegation_cred = NULL;
26e976a8 2946 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2947 fmode_t fmode;
2948 bool truncate;
65e4308d 2949 int status;
1da177e4 2950
8487c479 2951 nfs_fattr_init(res->fattr);
1da177e4 2952
ee3ae84e 2953 /* Servers should only apply open mode checks for file size changes */
8487c479 2954 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
ee3ae84e
TM		 2955 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2956
8487c479 2957 if (nfs4_copy_delegation_stateid(inode, fmode, &arg->stateid, &delegation_cred)) {
ee3ae84e 2958 /* Use that stateid */
29b59f94 2959 } else if (truncate && ctx != NULL) {
17393475 2960 struct nfs_lock_context *l_ctx;
29b59f94 2961 if (!nfs4_valid_open_stateid(ctx->state))
0418dae1 2962 return -EBADF;
17393475
N		 2963 l_ctx = nfs_get_lock_context(ctx);
2964 if (IS_ERR(l_ctx))
2965 return PTR_ERR(l_ctx);
7a0566b3
N		 2966 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx,
2967 &arg->stateid, &delegation_cred);
2968 nfs_put_lock_context(l_ctx);
2969 if (status == -EIO)
0418dae1 2970 return -EBADF;
08e9eac4 2971 } else
8487c479 2972 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
abf4e13c
TM		 2973 if (delegation_cred)
2974 msg.rpc_cred = delegation_cred;
1da177e4 2975
8487c479 2976 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
abf4e13c
TM		 2977
2978 put_rpccred(delegation_cred);
29b59f94 2979 if (status == 0 && ctx != NULL)
26e976a8 2980 renew_lease(server, timestamp);
8487c479 2981 trace_nfs4_setattr(inode, &arg->stateid, status);
65e4308d 2982 return status;
1da177e4
LT		 2983}
2984
659bfcd6
TM		 2985static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2986 struct nfs_fattr *fattr, struct iattr *sattr,
29b59f94 2987 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
1775fd3e 2988 struct nfs4_label *olabel)
1da177e4 2989{
3e4f6290 2990 struct nfs_server *server = NFS_SERVER(inode);
29b59f94 2991 struct nfs4_state *state = ctx ? ctx->state : NULL;
8487c479
TM		 2992 struct nfs_setattrargs arg = {
2993 .fh = NFS_FH(inode),
2994 .iap = sattr,
2995 .server = server,
2996 .bitmask = server->attr_bitmask,
2997 .label = ilabel,
2998 };
2999 struct nfs_setattrres res = {
3000 .fattr = fattr,
3001 .label = olabel,
3002 .server = server,
3003 };
a1d0b5ee
TM		 3004 struct nfs4_exception exception = {
3005 .state = state,
3114ea7a 3006 .inode = inode,
8487c479 3007 .stateid = &arg.stateid,
a1d0b5ee 3008 };
1da177e4 3009 int err;
8487c479
TM		 3010
3011 arg.bitmask = nfs4_bitmask(server, ilabel);
3012 if (ilabel)
3013 arg.bitmask = nfs4_bitmask(server, olabel);
3014
1da177e4 3015 do {
29b59f94 3016 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx);
451146be
TM		 3017 switch (err) {
3018 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 3019 if (!(sattr->ia_valid & ATTR_SIZE)) {
3020 pr_warn_once("NFSv4: server %s is incorrectly "
3021 "applying open mode checks to "
3022 "a SETATTR that is not "
3023 "changing file size.\n",
3024 server->nfs_client->cl_hostname);
3025 }
451146be
TM		 3026 if (state && !(state->state & FMODE_WRITE)) {
3027 err = -EBADF;
3028 if (sattr->ia_valid & ATTR_OPEN)
3029 err = -EACCES;
3030 goto out;
3031 }
3032 }
3033 err = nfs4_handle_exception(server, err, &exception);
1da177e4 3034 } while (exception.retry);
451146be 3035out:
1da177e4
LT		 3036 return err;
3037}
3038
500d701f
PT		 3039static bool
3040nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
3041{
3042 if (inode == NULL || !nfs_have_layout(inode))
3043 return false;
3044
3045 return pnfs_wait_on_layoutreturn(inode, task);
3046}
3047
1da177e4
LT		 3048struct nfs4_closedata {
3049 struct inode *inode;
3050 struct nfs4_state *state;
3051 struct nfs_closeargs arg;
3052 struct nfs_closeres res;
cf805165
TM		 3053 struct {
3054 struct nfs4_layoutreturn_args arg;
3055 struct nfs4_layoutreturn_res res;
4d796d75 3056 struct nfs4_xdr_opaque_data ld_private;
cf805165
TM		 3057 u32 roc_barrier;
3058 bool roc;
3059 } lr;
516a6af6 3060 struct nfs_fattr fattr;
26e976a8 3061 unsigned long timestamp;
1da177e4
LT		 3062};
3063
963d8fe5 3064static void nfs4_free_closedata(void *data)
9512135d 3065{
963d8fe5
TM		 3066 struct nfs4_closedata *calldata = data;
3067 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 3068 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 3069
cf805165 3070 if (calldata->lr.roc)
1c5bd76d
TM		 3071 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res,
3072 calldata->res.lr_ret);
9512135d
TM		 3073 nfs4_put_open_state(calldata->state);
3074 nfs_free_seqid(calldata->arg.seqid);
9512135d 3075 nfs4_put_state_owner(sp);
322b2b90 3076 nfs_sb_deactive(sb);
9512135d
TM		 3077 kfree(calldata);
3078}
3079
963d8fe5 3080static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 3081{
963d8fe5 3082 struct nfs4_closedata *calldata = data;
1da177e4 3083 struct nfs4_state *state = calldata->state;
1da177e4 3084 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 3085 nfs4_stateid *res_stateid = NULL;
1da177e4 3086
a3ca5651 3087 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 3088 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3089 return;
42113a75 3090 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
cf805165
TM		 3091
3092 /* Handle Layoutreturn errors */
3093 if (calldata->arg.lr_args && task->tk_status != 0) {
3094 switch (calldata->res.lr_ret) {
3095 default:
3096 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
3097 break;
3098 case 0:
3099 calldata->arg.lr_args = NULL;
3100 calldata->res.lr_res = NULL;
3101 break;
3102 case -NFS4ERR_ADMIN_REVOKED:
3103 case -NFS4ERR_DELEG_REVOKED:
3104 case -NFS4ERR_EXPIRED:
3105 case -NFS4ERR_BAD_STATEID:
3106 case -NFS4ERR_OLD_STATEID:
3107 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
3108 case -NFS4ERR_WRONG_CRED:
3109 calldata->arg.lr_args = NULL;
3110 calldata->res.lr_res = NULL;
3111 calldata->res.lr_ret = 0;
3112 rpc_restart_call_prepare(task);
3113 return;
3114 }
3115 }
3116
1da177e4
LT		 3117 /* hmm. we are done with the inode, and in the process of freeing
3118 * the state_owner. we keep this around to process errors
3119 */
1da177e4
LT		 3120 switch (task->tk_status) {
3121 case 0:
412f6c4c 3122 res_stateid = &calldata->res.stateid;
26e976a8 3123 renew_lease(server, calldata->timestamp);
412f6c4c 3124 break;
f07d4a31
TM		 3125 case -NFS4ERR_ACCESS:
3126 if (calldata->arg.bitmask != NULL) {
3127 calldata->arg.bitmask = NULL;
3128 calldata->res.fattr = NULL;
3129 task->tk_status = 0;
3130 rpc_restart_call_prepare(task);
3131 goto out_release;
3132
3133 }
3134 break;
69794ad7 3135 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 3136 case -NFS4ERR_STALE_STATEID:
26d36301
TM		 3137 case -NFS4ERR_EXPIRED:
3138 nfs4_free_revoked_stateid(server,
3139 &calldata->arg.stateid,
3140 task->tk_msg.rpc_cred);
9e33bed5
TM		 3141 case -NFS4ERR_OLD_STATEID:
3142 case -NFS4ERR_BAD_STATEID:
566fcec6 3143 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 3144 &state->open_stateid)) {
566fcec6
TM		 3145 rpc_restart_call_prepare(task);
3146 goto out_release;
3147 }
dc0b027d 3148 if (calldata->arg.fmode == 0)
9e33bed5 3149 break;
1da177e4 3150 default:
8478eaa1 3151 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 3152 rpc_restart_call_prepare(task);
69794ad7
TM		 3153 goto out_release;
3154 }
1da177e4 3155 }
4a1e2feb
TM		 3156 nfs_clear_open_stateid(state, &calldata->arg.stateid,
3157 res_stateid, calldata->arg.fmode);
69794ad7 3158out_release:
72211dbe 3159 nfs_release_seqid(calldata->arg.seqid);
d8d84983 3160 nfs_refresh_inode(calldata->inode, &calldata->fattr);
a3ca5651 3161 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 3162}
3163
4ce70ada 3164static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 3165{
4ce70ada 3166 struct nfs4_closedata *calldata = data;
9512135d 3167 struct nfs4_state *state = calldata->state;
7fdab069 3168 struct inode *inode = calldata->inode;
aee7af35 3169 bool is_rdonly, is_wronly, is_rdwr;
88069f77 3170 int call_close = 0;
9512135d 3171
a3ca5651 3172 dprintk("%s: begin!\n", __func__);
963d8fe5 3173 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 3174 goto out_wait;
003707c7 3175
88069f77 3176 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 3177 spin_lock(&state->owner->so_lock);
aee7af35
TM		 3178 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
3179 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
3180 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 3181 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 3182 /* Calculate the change in open mode */
cd9288ff 3183 calldata->arg.fmode = 0;
e7616923 3184 if (state->n_rdwr == 0) {
cd9288ff
TM		 3185 if (state->n_rdonly == 0)
3186 call_close |= is_rdonly;
3187 else if (is_rdonly)
3188 calldata->arg.fmode |= FMODE_READ;
3189 if (state->n_wronly == 0)
3190 call_close |= is_wronly;
3191 else if (is_wronly)
3192 calldata->arg.fmode |= FMODE_WRITE;
e547f262
TM		 3193 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
3194 call_close |= is_rdwr;
cd9288ff
TM		 3195 } else if (is_rdwr)
3196 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
3197
5cc7861e
TM		 3198 if (!nfs4_valid_open_stateid(state) ||
3199 test_bit(NFS_OPEN_STATE, &state->flags) == 0)
5d422301 3200 call_close = 0;
4cecb76f 3201 spin_unlock(&state->owner->so_lock);
88069f77
TM		 3202
3203 if (!call_close) {
963d8fe5 3204 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 3205 goto out_no_action;
9512135d 3206 }
88069f77 3207
1c5bd76d 3208 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) {
500d701f
PT		 3209 nfs_release_seqid(calldata->arg.seqid);
3210 goto out_wait;
3211 }
3212
9413a1a1 3213 if (calldata->arg.fmode == 0)
88069f77 3214 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3ecefc92 3215
9413a1a1 3216 if (calldata->arg.fmode == 0 || calldata->arg.fmode == FMODE_READ) {
3ecefc92
TM		 3217 /* Close-to-open cache consistency revalidation */
3218 if (!nfs4_have_delegation(inode, FMODE_READ))
3219 calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask;
3220 else
3221 calldata->arg.bitmask = NULL;
3222 }
3c13cb5b 3223
6ae37339
TM		 3224 calldata->arg.share_access =
3225 nfs4_map_atomic_open_share(NFS_SERVER(inode),
3226 calldata->arg.fmode, 0);
88069f77 3227
d8d84983
TM		 3228 if (calldata->res.fattr == NULL)
3229 calldata->arg.bitmask = NULL;
3230 else if (calldata->arg.bitmask == NULL)
3231 calldata->res.fattr = NULL;
26e976a8 3232 calldata->timestamp = jiffies;
7fdab069 3233 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 3234 &calldata->arg.seq_args,
3235 &calldata->res.seq_res,
2240a9e2
TM		 3236 task) != 0)
3237 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 3238 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 3239 return;
3240out_no_action:
3241 task->tk_action = NULL;
3242out_wait:
3243 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 3244}
3245
963d8fe5 3246static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 3247 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 3248 .rpc_call_done = nfs4_close_done,
3249 .rpc_release = nfs4_free_closedata,
3250};
3251
1da177e4
LT		 3252/*
3253 * It is possible for data to be read/written from a mem-mapped file
3254 * after the sys_close call (which hits the vfs layer as a flush).
3255 * This means that we can't safely call nfsv4 close on a file until
3256 * the inode is cleared. This in turn means that we are not good
3257 * NFSv4 citizens - we do not indicate to the server to update the file's
3258 * share state even when we are done with one of the three share
3259 * stateid's in the inode.
3260 *
3261 * NOTE: Caller must be holding the sp->so_owner semaphore!
3262 */
1f7977c1 3263int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 3264{
4a35bd41 3265 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 3266 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 3267 struct nfs4_closedata *calldata;
b39e625b
TM		 3268 struct nfs4_state_owner *sp = state->owner;
3269 struct rpc_task *task;
5138fde0
TM		 3270 struct rpc_message msg = {
3271 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3272 .rpc_cred = state->owner->so_cred,
3273 };
c970aa85
TM		 3274 struct rpc_task_setup task_setup_data = {
3275 .rpc_client = server->client,
5138fde0 3276 .rpc_message = &msg,
c970aa85 3277 .callback_ops = &nfs4_close_ops,
101070ca 3278 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3279 .flags = RPC_TASK_ASYNC,
3280 };
9512135d 3281 int status = -ENOMEM;
1da177e4 3282
fa940720
WAA		 3283 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3284 &task_setup_data.rpc_client, &msg);
3285
8535b2be 3286 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 3287 if (calldata == NULL)
9512135d 3288 goto out;
a9c92d6b 3289 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 3290 calldata->inode = state->inode;
1da177e4 3291 calldata->state = state;
4a35bd41 3292 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 3293 /* Serialization for the sequence id */
63f5f796
TM		 3294 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3295 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 3296 if (IS_ERR(calldata->arg.seqid))
9512135d 3297 goto out_free_calldata;
d8d84983 3298 nfs_fattr_init(&calldata->fattr);
dc0b027d 3299 calldata->arg.fmode = 0;
4d796d75 3300 calldata->lr.arg.ld_private = &calldata->lr.ld_private;
516a6af6 3301 calldata->res.fattr = &calldata->fattr;
c1d51931 3302 calldata->res.seqid = calldata->arg.seqid;
516a6af6 3303 calldata->res.server = server;
cf805165 3304 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
1c5bd76d
TM		 3305 calldata->lr.roc = pnfs_roc(state->inode,
3306 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred);
3307 if (calldata->lr.roc) {
3308 calldata->arg.lr_args = &calldata->lr.arg;
3309 calldata->res.lr_res = &calldata->lr.res;
3310 }
643168c2 3311 nfs_sb_active(calldata->inode->i_sb);
9512135d 3312
1174dd1f
TM		 3313 msg.rpc_argp = &calldata->arg;
3314 msg.rpc_resp = &calldata->res;
c970aa85
TM		 3315 task_setup_data.callback_data = calldata;
3316 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 3317 if (IS_ERR(task))
3318 return PTR_ERR(task);
a49c3c77
TM		 3319 status = 0;
3320 if (wait)
3321 status = rpc_wait_for_completion_task(task);
b39e625b 3322 rpc_put_task(task);
a49c3c77 3323 return status;
9512135d
TM		 3324out_free_calldata:
3325 kfree(calldata);
3326out:
b39e625b
TM		 3327 nfs4_put_open_state(state);
3328 nfs4_put_state_owner(sp);
9512135d 3329 return status;
1da177e4
LT		 3330}
3331
2b484297 3332static struct inode *
5bc2afc2
TM		 3333nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3334 int open_flags, struct iattr *attr, int *opened)
1da177e4 3335{
1da177e4 3336 struct nfs4_state *state;
aa9c2669
DQ		 3337 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3338
3339 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 3340
565277f6 3341 /* Protect against concurrent sillydeletes */
5bc2afc2 3342 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 3343
3344 nfs4_label_release_security(label);
3345
f46e0bd3
TM		 3346 if (IS_ERR(state))
3347 return ERR_CAST(state);
275bb307 3348 return state->inode;
1da177e4
LT		 3349}
3350
1185a552 3351static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 3352{
3353 if (ctx->state == NULL)
3354 return;
3355 if (is_sync)
643168c2 3356 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 3357 else
643168c2 3358 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 3359}
1da177e4 3360
b944dba3
TM		 3361#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3362#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
dff25ddb 3363#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_MODE_UMASK - 1UL)
b944dba3 3364
1da177e4
LT		 3365static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3366{
8c61282f 3367 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 3368 struct nfs4_server_caps_arg args = {
3369 .fhandle = fhandle,
8c61282f 3370 .bitmask = bitmask,
43652ad5 3371 };
1da177e4
LT		 3372 struct nfs4_server_caps_res res = {};
3373 struct rpc_message msg = {
3374 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 3375 .rpc_argp = &args,
1da177e4
LT		 3376 .rpc_resp = &res,
3377 };
3378 int status;
3379
8c61282f
KM		 3380 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3381 FATTR4_WORD0_FH_EXPIRE_TYPE |
3382 FATTR4_WORD0_LINK_SUPPORT |
3383 FATTR4_WORD0_SYMLINK_SUPPORT |
3384 FATTR4_WORD0_ACLSUPPORT;
3385 if (minorversion)
3386 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3387
7c513058 3388 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3389 if (status == 0) {
b944dba3 3390 /* Sanity check the server answers */
8c61282f 3391 switch (minorversion) {
b944dba3
TM		 3392 case 0:
3393 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3394 res.attr_bitmask[2] = 0;
3395 break;
3396 case 1:
3397 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3398 break;
3399 case 2:
3400 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3401 }
1da177e4 3402 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 3403 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3404 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3405 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3406 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 3407 NFS_CAP_CTIME|NFS_CAP_MTIME|
3408 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 3409 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3410 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 3411 server->caps |= NFS_CAP_ACLS;
3412 if (res.has_links != 0)
3413 server->caps |= NFS_CAP_HARDLINKS;
3414 if (res.has_symlinks != 0)
3415 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 3416 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3417 server->caps |= NFS_CAP_FILEID;
3418 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3419 server->caps |= NFS_CAP_MODE;
3420 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3421 server->caps |= NFS_CAP_NLINK;
3422 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3423 server->caps |= NFS_CAP_OWNER;
3424 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3425 server->caps |= NFS_CAP_OWNER_GROUP;
3426 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3427 server->caps |= NFS_CAP_ATIME;
3428 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3429 server->caps |= NFS_CAP_CTIME;
3430 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3431 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 3432#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3433 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3434 server->caps |= NFS_CAP_SECURITY_LABEL;
3435#endif
3436 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3437 sizeof(server->attr_bitmask));
b944dba3 3438 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 3439
a65318bf
TM		 3440 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3441 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3442 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 3443 server->cache_consistency_bitmask[2] = 0;
8c61282f
KM		 3444 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3445 sizeof(server->exclcreat_bitmask));
1da177e4 3446 server->acl_bitmask = res.acl_bitmask;
264e6351 3447 server->fh_expire_type = res.fh_expire_type;
1da177e4 3448 }
cccef3b9 3449
1da177e4
LT		 3450 return status;
3451}
3452
55a97593 3453int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 3454{
3455 struct nfs4_exception exception = { };
3456 int err;
3457 do {
3458 err = nfs4_handle_exception(server,
3459 _nfs4_server_capabilities(server, fhandle),
3460 &exception);
3461 } while (exception.retry);
3462 return err;
3463}
3464
3465static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3466 struct nfs_fsinfo *info)
3467{
aa9c2669 3468 u32 bitmask[3];
1da177e4 3469 struct nfs4_lookup_root_arg args = {
aa9c2669 3470 .bitmask = bitmask,
1da177e4
LT		 3471 };
3472 struct nfs4_lookup_res res = {
3473 .server = server,
0e574af1 3474 .fattr = info->fattr,
1da177e4
LT		 3475 .fh = fhandle,
3476 };
3477 struct rpc_message msg = {
3478 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3479 .rpc_argp = &args,
3480 .rpc_resp = &res,
3481 };
008f55d0 3482
aa9c2669
DQ		 3483 bitmask[0] = nfs4_fattr_bitmap[0];
3484 bitmask[1] = nfs4_fattr_bitmap[1];
3485 /*
3486 * Process the label in the upcoming getfattr
3487 */
3488 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3489
0e574af1 3490 nfs_fattr_init(info->fattr);
7c513058 3491 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3492}
3493
3494static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3495 struct nfs_fsinfo *info)
3496{
3497 struct nfs4_exception exception = { };
3498 int err;
3499 do {
fb8a5ba8 3500 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3501 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3502 switch (err) {
3503 case 0:
3504 case -NFS4ERR_WRONGSEC:
05e9cfb4 3505 goto out;
fb8a5ba8
BS		 3506 default:
3507 err = nfs4_handle_exception(server, err, &exception);
3508 }
1da177e4 3509 } while (exception.retry);
05e9cfb4 3510out:
1da177e4
LT		 3511 return err;
3512}
3513
8f70e95f
BS		 3514static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3515 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3516{
c2190661
TM		 3517 struct rpc_auth_create_args auth_args = {
3518 .pseudoflavor = flavor,
3519 };
8f70e95f
BS		 3520 struct rpc_auth *auth;
3521 int ret;
3522
c2190661 3523 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3524 if (IS_ERR(auth)) {
75bc8821 3525 ret = -EACCES;
8f70e95f
BS		 3526 goto out;
3527 }
3528 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3529out:
3530 return ret;
3531}
3532
9a744ba3
CL		 3533/*
3534 * Retry pseudoroot lookup with various security flavors. We do this when:
3535 *
3536 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3537 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3538 *
3539 * Returns zero on success, or a negative NFS4ERR value, or a
3540 * negative errno value.
3541 */
801a16dc 3542static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3543 struct nfs_fsinfo *info)
1da177e4 3544{
9a744ba3
CL		 3545 /* Per 3530bis 15.33.5 */
3546 static const rpc_authflavor_t flav_array[] = {
3547 RPC_AUTH_GSS_KRB5P,
3548 RPC_AUTH_GSS_KRB5I,
3549 RPC_AUTH_GSS_KRB5,
c4eafe11 3550 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3551 RPC_AUTH_NULL,
3552 };
3553 int status = -EPERM;
3554 size_t i;
6a1a1e34 3555
4d4b69dd
WAA		 3556 if (server->auth_info.flavor_len > 0) {
3557 /* try each flavor specified by user */
3558 for (i = 0; i < server->auth_info.flavor_len; i++) {
3559 status = nfs4_lookup_root_sec(server, fhandle, info,
3560 server->auth_info.flavors[i]);
3561 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3562 continue;
3563 break;
3564 }
3565 } else {
3566 /* no flavors specified by user, try default list */
3567 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3568 status = nfs4_lookup_root_sec(server, fhandle, info,
3569 flav_array[i]);
3570 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3571 continue;
3572 break;
3573 }
8f70e95f 3574 }
9a744ba3 3575
fb8a5ba8
BS		 3576 /*
3577 * -EACCESS could mean that the user doesn't have correct permissions
3578 * to access the mount. It could also mean that we tried to mount
3579 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3580 * existing mount programs don't handle -EACCES very well so it should
3581 * be mapped to -EPERM instead.
3582 */
3583 if (status == -EACCES)
3584 status = -EPERM;
801a16dc
BS		 3585 return status;
3586}
3587
2ed4b95b
CL		 3588/**
3589 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3590 * @server: initialized nfs_server handle
3591 * @fhandle: we fill in the pseudo-fs root file handle
3592 * @info: we fill in an FSINFO struct
5e6b1990 3593 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3594 *
3595 * Returns zero on success, or a negative errno.
801a16dc 3596 */
3028eb2b 3597int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3598 struct nfs_fsinfo *info,
3599 bool auth_probe)
801a16dc 3600{
c7757074 3601 int status = 0;
2ed4b95b 3602
c7757074 3603 if (!auth_probe)
5e6b1990 3604 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3605
3606 if (auth_probe || status == NFS4ERR_WRONGSEC)
698c937b
TM		 3607 status = server->nfs_client->cl_mvops->find_root_sec(server,
3608 fhandle, info);
2ed4b95b 3609
1da177e4
LT		 3610 if (status == 0)
3611 status = nfs4_server_capabilities(server, fhandle);
3612 if (status == 0)
3613 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3614
c12e87f4 3615 return nfs4_map_errors(status);
1da177e4
LT		 3616}
3617
bae36241
BS		 3618static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3619 struct nfs_fsinfo *info)
3620{
3621 int error;
3622 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3623 struct nfs4_label *label = NULL;
bae36241
BS		 3624
3625 error = nfs4_server_capabilities(server, mntfh);
3626 if (error < 0) {
3627 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3628 return error;
3629 }
3630
14c43f76
DQ		 3631 label = nfs4_label_alloc(server, GFP_KERNEL);
3632 if (IS_ERR(label))
3633 return PTR_ERR(label);
3634
1775fd3e 3635 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3636 if (error < 0) {
3637 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3638 goto err_free_label;
bae36241
BS		 3639 }
3640
3641 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3642 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3643 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3644
14c43f76
DQ		 3645err_free_label:
3646 nfs4_label_free(label);
3647
bae36241
BS		 3648 return error;
3649}
3650
6b97fd3d
MN		 3651/*
3652 * Get locations and (maybe) other attributes of a referral.
3653 * Note that we'll actually follow the referral later when
3654 * we detect fsid mismatch in inode revalidation
3655 */
f05d147f
BS		 3656static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3657 const struct qstr *name, struct nfs_fattr *fattr,
3658 struct nfs_fh *fhandle)
6b97fd3d
MN		 3659{
3660 int status = -ENOMEM;
3661 struct page *page = NULL;
3662 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3663
3664 page = alloc_page(GFP_KERNEL);
3665 if (page == NULL)
3666 goto out;
3667 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3668 if (locations == NULL)
3669 goto out;
3670
f05d147f 3671 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3672 if (status != 0)
3673 goto out;
519ae255
CL		 3674
3675 /*
3676 * If the fsid didn't change, this is a migration event, not a
3677 * referral. Cause us to drop into the exception handler, which
3678 * will kick off migration recovery.
3679 */
6b97fd3d 3680 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3681 dprintk("%s: server did not return a different fsid for"
3682 " a referral at %s\n", __func__, name->name);
519ae255 3683 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3684 goto out;
3685 }
533eb461
AA		 3686 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3687 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3688
533eb461 3689 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3690 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3691 memset(fhandle, 0, sizeof(struct nfs_fh));
3692out:
3693 if (page)
3694 __free_page(page);
5d7ca35a 3695 kfree(locations);
6b97fd3d
MN		 3696 return status;
3697}
3698
1775fd3e
DQ		 3699static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3700 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3701{
3702 struct nfs4_getattr_arg args = {
3703 .fh = fhandle,
3704 .bitmask = server->attr_bitmask,
3705 };
3706 struct nfs4_getattr_res res = {
3707 .fattr = fattr,
1775fd3e 3708 .label = label,
1da177e4
LT		 3709 .server = server,
3710 };
3711 struct rpc_message msg = {
3712 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3713 .rpc_argp = &args,
3714 .rpc_resp = &res,
3715 };
aa9c2669
DQ		 3716
3717 args.bitmask = nfs4_bitmask(server, label);
3718
0e574af1 3719 nfs_fattr_init(fattr);
7c513058 3720 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3721}
3722
1775fd3e
DQ		 3723static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3724 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3725{
3726 struct nfs4_exception exception = { };
3727 int err;
3728 do {
b5f875a9
TM		 3729 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3730 trace_nfs4_getattr(server, fhandle, fattr, err);
3731 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3732 &exception);
3733 } while (exception.retry);
3734 return err;
3735}
3736
3737/*
3738 * The file is not closed if it is opened due to the a request to change
3739 * the size of the file. The open call will not be needed once the
3740 * VFS layer lookup-intents are implemented.
3741 *
3742 * Close is called when the inode is destroyed.
3743 * If we haven't opened the file for O_WRONLY, we
3744 * need to in the size_change case to obtain a stateid.
3745 *
3746 * Got race?
3747 * Because OPEN is always done by name in nfsv4, it is
3748 * possible that we opened a different file by the same
3749 * name. We can recognize this race condition, but we
3750 * can't do anything about it besides returning an error.
3751 *
3752 * This will be fixed with VFS changes (lookup-intent).
3753 */
3754static int
3755nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3756 struct iattr *sattr)
3757{
2b0143b5 3758 struct inode *inode = d_inode(dentry);
659bfcd6 3759 struct rpc_cred *cred = NULL;
29b59f94 3760 struct nfs_open_context *ctx = NULL;
14c43f76 3761 struct nfs4_label *label = NULL;
1da177e4
LT		 3762 int status;
3763
88ac815c
PT		 3764 if (pnfs_ld_layoutret_on_setattr(inode) &&
3765 sattr->ia_valid & ATTR_SIZE &&
3766 sattr->ia_size < i_size_read(inode))
24028672 3767 pnfs_commit_and_return_layout(inode);
8a1636c4 3768
0e574af1 3769 nfs_fattr_init(fattr);
1da177e4 3770
2669940d
AA		 3771 /* Deal with open(O_TRUNC) */
3772 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3773 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3774
3775 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3776 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3777 return 0;
3778
d530838b 3779 /* Search for an existing open(O_WRITE) file */
659bfcd6 3780 if (sattr->ia_valid & ATTR_FILE) {
659bfcd6
TM		 3781
3782 ctx = nfs_file_open_context(sattr->ia_file);
29b59f94 3783 if (ctx)
504e5189 3784 cred = ctx->cred;
659bfcd6 3785 }
08e9eac4 3786
14c43f76
DQ		 3787 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3788 if (IS_ERR(label))
3789 return PTR_ERR(label);
3790
29b59f94 3791 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label);
aa9c2669 3792 if (status == 0) {
f044636d 3793 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3794 nfs_setsecurity(inode, fattr, label);
3795 }
14c43f76 3796 nfs4_label_free(label);
1da177e4
LT		 3797 return status;
3798}
3799
0c2e53f1
TM		 3800static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3801 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3802 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3803{
0c2e53f1 3804 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3805 int status;
3806 struct nfs4_lookup_arg args = {
3807 .bitmask = server->attr_bitmask,
0c2e53f1 3808 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3809 .name = name,
3810 };
3811 struct nfs4_lookup_res res = {
3812 .server = server,
3813 .fattr = fattr,
aa9c2669 3814 .label = label,
2b3de441
DH		 3815 .fh = fhandle,
3816 };
3817 struct rpc_message msg = {
3818 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3819 .rpc_argp = &args,
3820 .rpc_resp = &res,
3821 };
3822
aa9c2669
DQ		 3823 args.bitmask = nfs4_bitmask(server, label);
3824
2b3de441
DH		 3825 nfs_fattr_init(fattr);
3826
1da177e4 3827 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3828 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3829 dprintk("NFS reply lookup: %d\n", status);
3830 return status;
3831}
3832
72de53ec 3833static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3834{
7ebb9315 3835 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3836 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3837 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3838 fattr->nlink = 2;
3839}
3840
72de53ec 3841static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
beffb8fe 3842 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3843 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3844{
3845 struct nfs4_exception exception = { };
72de53ec 3846 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3847 int err;
3848 do {
1775fd3e 3849 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3850 trace_nfs4_lookup(dir, name, err);
72de53ec 3851 switch (err) {
08ef7bd3 3852 case -NFS4ERR_BADNAME:
72de53ec
BS		 3853 err = -ENOENT;
3854 goto out;
0c2e53f1 3855 case -NFS4ERR_MOVED:
f05d147f 3856 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3857 if (err == -NFS4ERR_MOVED)
3858 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3859 goto out;
0c2e53f1 3860 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3861 err = -EPERM;
3862 if (client != *clnt)
3863 goto out;
66b06860 3864 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3865 if (IS_ERR(client))
3866 return PTR_ERR(client);
3867
3868 exception.retry = 1;
3869 break;
3870 default:
3871 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3872 }
1da177e4 3873 } while (exception.retry);
72de53ec
BS		 3874
3875out:
3876 if (err == 0)
3877 *clnt = client;
3878 else if (client != *clnt)
3879 rpc_shutdown_client(client);
3880
1da177e4
LT		 3881 return err;
3882}
3883
beffb8fe 3884static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1775fd3e
DQ		 3885 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3886 struct nfs4_label *label)
72de53ec
BS		 3887{
3888 int status;
3889 struct rpc_clnt *client = NFS_CLIENT(dir);
3890
1775fd3e 3891 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3892 if (client != NFS_CLIENT(dir)) {
3893 rpc_shutdown_client(client);
3894 nfs_fixup_secinfo_attributes(fattr);
3895 }
3896 return status;
3897}
3898
f05d147f 3899struct rpc_clnt *
beffb8fe 3900nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name,
f05d147f
BS		 3901 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3902{
b72888cb 3903 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3904 int status;
f05d147f 3905
1775fd3e 3906 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3907 if (status < 0)
f05d147f 3908 return ERR_PTR(status);
b72888cb 3909 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3910}
3911
1da177e4
LT		 3912static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3913{
76b32999 3914 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3915 struct nfs4_accessargs args = {
3916 .fh = NFS_FH(inode),
a4980e78 3917 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3918 };
3919 struct nfs4_accessres res = {
3920 .server = server,
1da177e4 3921 };
1da177e4
LT		 3922 struct rpc_message msg = {
3923 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3924 .rpc_argp = &args,
3925 .rpc_resp = &res,
3926 .rpc_cred = entry->cred,
3927 };
3928 int mode = entry->mask;
aa9c2669 3929 int status = 0;
1da177e4
LT		 3930
3931 /*
3932 * Determine which access bits we want to ask for...
3933 */
3934 if (mode & MAY_READ)
3935 args.access |= NFS4_ACCESS_READ;
3936 if (S_ISDIR(inode->i_mode)) {
3937 if (mode & MAY_WRITE)
3938 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3939 if (mode & MAY_EXEC)
3940 args.access |= NFS4_ACCESS_LOOKUP;
3941 } else {
3942 if (mode & MAY_WRITE)
3943 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3944 if (mode & MAY_EXEC)
3945 args.access |= NFS4_ACCESS_EXECUTE;
3946 }
c407d41a
TM		 3947
3948 res.fattr = nfs_alloc_fattr();
3949 if (res.fattr == NULL)
3950 return -ENOMEM;
3951
7c513058 3952 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3953 if (!status) {
6168f62c 3954 nfs_access_set_mask(entry, res.access);
c407d41a 3955 nfs_refresh_inode(inode, res.fattr);
1da177e4 3956 }
c407d41a 3957 nfs_free_fattr(res.fattr);
1da177e4
LT		 3958 return status;
3959}
3960
3961static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3962{
3963 struct nfs4_exception exception = { };
3964 int err;
3965 do {
c1578b76
TM		 3966 err = _nfs4_proc_access(inode, entry);
3967 trace_nfs4_access(inode, err);
3968 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3969 &exception);
3970 } while (exception.retry);
3971 return err;
3972}
3973
3974/*
3975 * TODO: For the time being, we don't try to get any attributes
3976 * along with any of the zero-copy operations READ, READDIR,
3977 * READLINK, WRITE.
3978 *
3979 * In the case of the first three, we want to put the GETATTR
3980 * after the read-type operation -- this is because it is hard
3981 * to predict the length of a GETATTR response in v4, and thus
3982 * align the READ data correctly. This means that the GETATTR
3983 * may end up partially falling into the page cache, and we should
3984 * shift it into the 'tail' of the xdr_buf before processing.
3985 * To do this efficiently, we need to know the total length
3986 * of data received, which doesn't seem to be available outside
3987 * of the RPC layer.
3988 *
3989 * In the case of WRITE, we also want to put the GETATTR after
3990 * the operation -- in this case because we want to make sure
140150db 3991 * we get the post-operation mtime and size.
1da177e4
LT		 3992 *
3993 * Both of these changes to the XDR layer would in fact be quite
3994 * minor, but I decided to leave them for a subsequent patch.
3995 */
3996static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3997 unsigned int pgbase, unsigned int pglen)
3998{
3999 struct nfs4_readlink args = {
4000 .fh = NFS_FH(inode),
4001 .pgbase = pgbase,
4002 .pglen = pglen,
4003 .pages = &page,
4004 };
f50c7000 4005 struct nfs4_readlink_res res;
1da177e4
LT		 4006 struct rpc_message msg = {
4007 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
4008 .rpc_argp = &args,
f50c7000 4009 .rpc_resp = &res,
1da177e4
LT		 4010 };
4011
7c513058 4012 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4013}
4014
4015static int nfs4_proc_readlink(struct inode *inode, struct page *page,
4016 unsigned int pgbase, unsigned int pglen)
4017{
4018 struct nfs4_exception exception = { };
4019 int err;
4020 do {
c1578b76
TM		 4021 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
4022 trace_nfs4_readlink(inode, err);
4023 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 4024 &exception);
4025 } while (exception.retry);
4026 return err;
4027}
4028
1da177e4 4029/*
8867fe58 4030 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 4031 */
1da177e4
LT		 4032static int
4033nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 4034 int flags)
1da177e4 4035{
dff25ddb 4036 struct nfs_server *server = NFS_SERVER(dir);
aa9c2669 4037 struct nfs4_label l, *ilabel = NULL;
8867fe58 4038 struct nfs_open_context *ctx;
1da177e4 4039 struct nfs4_state *state;
1da177e4
LT		 4040 int status = 0;
4041
532d4def 4042 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL);
8867fe58
MS		 4043 if (IS_ERR(ctx))
4044 return PTR_ERR(ctx);
4045
aa9c2669
DQ		 4046 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
4047
dff25ddb
AG		 4048 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4049 sattr->ia_mode &= ~current_umask();
c5c3fb5f 4050 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 4051 if (IS_ERR(state)) {
4052 status = PTR_ERR(state);
c0204fd2 4053 goto out;
1da177e4 4054 }
1da177e4 4055out:
aa9c2669 4056 nfs4_label_release_security(ilabel);
8867fe58 4057 put_nfs_open_context(ctx);
1da177e4
LT		 4058 return status;
4059}
4060
beffb8fe 4061static int _nfs4_proc_remove(struct inode *dir, const struct qstr *name)
1da177e4 4062{
16e42959 4063 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 4064 struct nfs_removeargs args = {
1da177e4 4065 .fh = NFS_FH(dir),
26fe5750 4066 .name = *name,
16e42959 4067 };
4fdc17b2 4068 struct nfs_removeres res = {
16e42959 4069 .server = server,
1da177e4 4070 };
1da177e4 4071 struct rpc_message msg = {
4fdc17b2
TM		 4072 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
4073 .rpc_argp = &args,
4074 .rpc_resp = &res,
1da177e4 4075 };
778d2817 4076 int status;
1da177e4 4077
7c513058 4078 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 4079 if (status == 0)
16e42959 4080 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 4081 return status;
4082}
4083
beffb8fe 4084static int nfs4_proc_remove(struct inode *dir, const struct qstr *name)
1da177e4
LT		 4085{
4086 struct nfs4_exception exception = { };
4087 int err;
4088 do {
078ea3df
TM		 4089 err = _nfs4_proc_remove(dir, name);
4090 trace_nfs4_remove(dir, name, err);
4091 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4092 &exception);
4093 } while (exception.retry);
4094 return err;
4095}
4096
e4eff1a6 4097static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 4098{
e4eff1a6
TM		 4099 struct nfs_server *server = NFS_SERVER(dir);
4100 struct nfs_removeargs *args = msg->rpc_argp;
4101 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 4102
e4eff1a6 4103 res->server = server;
1da177e4 4104 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 4105 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 4106
4107 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 4108}
4109
34e137cc
BS		 4110static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
4111{
884be175 4112 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb),
d9afbd1b
TM		 4113 &data->args.seq_args,
4114 &data->res.seq_res,
4115 task);
1da177e4
LT		 4116}
4117
e4eff1a6 4118static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 4119{
078ea3df
TM		 4120 struct nfs_unlinkdata *data = task->tk_calldata;
4121 struct nfs_removeres *res = &data->res;
e4eff1a6 4122
14516c3a
TM		 4123 if (!nfs4_sequence_done(task, &res->seq_res))
4124 return 0;
8478eaa1
N		 4125 if (nfs4_async_handle_error(task, res->server, NULL,
4126 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 4127 return 0;
4128 update_changeattr(dir, &res->cinfo);
e4eff1a6 4129 return 1;
1da177e4
LT		 4130}
4131
d3d4152a
JL		 4132static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
4133{
4134 struct nfs_server *server = NFS_SERVER(dir);
4135 struct nfs_renameargs *arg = msg->rpc_argp;
4136 struct nfs_renameres *res = msg->rpc_resp;
4137
4138 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 4139 res->server = server;
a9c92d6b 4140 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 4141}
4142
c6bfa1a1
BS		 4143static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
4144{
d9afbd1b
TM		 4145 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
4146 &data->args.seq_args,
4147 &data->res.seq_res,
4148 task);
d3d4152a
JL		 4149}
4150
4151static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
4152 struct inode *new_dir)
4153{
fbc6f7c2
TM		 4154 struct nfs_renamedata *data = task->tk_calldata;
4155 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 4156
4157 if (!nfs4_sequence_done(task, &res->seq_res))
4158 return 0;
8478eaa1 4159 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 4160 return 0;
4161
4162 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 4163 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 4164 return 1;
4165}
4166
beffb8fe 4167static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4 4168{
91ba2eee 4169 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 4170 struct nfs4_link_arg arg = {
4171 .fh = NFS_FH(inode),
4172 .dir_fh = NFS_FH(dir),
4173 .name = name,
91ba2eee
TM		 4174 .bitmask = server->attr_bitmask,
4175 };
91ba2eee
TM		 4176 struct nfs4_link_res res = {
4177 .server = server,
1775fd3e 4178 .label = NULL,
1da177e4 4179 };
1da177e4
LT		 4180 struct rpc_message msg = {
4181 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
4182 .rpc_argp = &arg,
91ba2eee 4183 .rpc_resp = &res,
1da177e4 4184 };
136f2627
TM		 4185 int status = -ENOMEM;
4186
4187 res.fattr = nfs_alloc_fattr();
778d2817 4188 if (res.fattr == NULL)
136f2627 4189 goto out;
1da177e4 4190
14c43f76
DQ		 4191 res.label = nfs4_label_alloc(server, GFP_KERNEL);
4192 if (IS_ERR(res.label)) {
4193 status = PTR_ERR(res.label);
4194 goto out;
4195 }
aa9c2669 4196 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 4197
7c513058 4198 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 4199 if (!status) {
4200 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 4201 status = nfs_post_op_update_inode(inode, res.fattr);
4202 if (!status)
4203 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 4204 }
14c43f76
DQ		 4205
4206
4207 nfs4_label_free(res.label);
4208
136f2627 4209out:
136f2627 4210 nfs_free_fattr(res.fattr);
1da177e4
LT		 4211 return status;
4212}
4213
beffb8fe 4214static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4
LT		 4215{
4216 struct nfs4_exception exception = { };
4217 int err;
4218 do {
4219 err = nfs4_handle_exception(NFS_SERVER(inode),
4220 _nfs4_proc_link(inode, dir, name),
4221 &exception);
4222 } while (exception.retry);
4223 return err;
4224}
4225
57dc9a57
TM		 4226struct nfs4_createdata {
4227 struct rpc_message msg;
4228 struct nfs4_create_arg arg;
4229 struct nfs4_create_res res;
4230 struct nfs_fh fh;
4231 struct nfs_fattr fattr;
1775fd3e 4232 struct nfs4_label *label;
57dc9a57
TM		 4233};
4234
4235static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
beffb8fe 4236 const struct qstr *name, struct iattr *sattr, u32 ftype)
57dc9a57
TM		 4237{
4238 struct nfs4_createdata *data;
4239
4240 data = kzalloc(sizeof(*data), GFP_KERNEL);
4241 if (data != NULL) {
4242 struct nfs_server *server = NFS_SERVER(dir);
4243
14c43f76
DQ		 4244 data->label = nfs4_label_alloc(server, GFP_KERNEL);
4245 if (IS_ERR(data->label))
4246 goto out_free;
4247
57dc9a57
TM		 4248 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
4249 data->msg.rpc_argp = &data->arg;
4250 data->msg.rpc_resp = &data->res;
4251 data->arg.dir_fh = NFS_FH(dir);
4252 data->arg.server = server;
4253 data->arg.name = name;
4254 data->arg.attrs = sattr;
4255 data->arg.ftype = ftype;
aa9c2669 4256 data->arg.bitmask = nfs4_bitmask(server, data->label);
dff25ddb 4257 data->arg.umask = current_umask();
57dc9a57
TM		 4258 data->res.server = server;
4259 data->res.fh = &data->fh;
4260 data->res.fattr = &data->fattr;
1775fd3e 4261 data->res.label = data->label;
57dc9a57 4262 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 4263 }
4264 return data;
14c43f76
DQ		 4265out_free:
4266 kfree(data);
4267 return NULL;
57dc9a57
TM		 4268}
4269
4270static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
4271{
7c513058 4272 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 4273 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 4274 if (status == 0) {
4275 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 4276 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 4277 }
4278 return status;
4279}
4280
4281static void nfs4_free_createdata(struct nfs4_createdata *data)
4282{
14c43f76 4283 nfs4_label_free(data->label);
57dc9a57
TM		 4284 kfree(data);
4285}
4286
4f390c15 4287static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 4288 struct page *page, unsigned int len, struct iattr *sattr,
4289 struct nfs4_label *label)
1da177e4 4290{
57dc9a57
TM		 4291 struct nfs4_createdata *data;
4292 int status = -ENAMETOOLONG;
1da177e4 4293
94a6d753 4294 if (len > NFS4_MAXPATHLEN)
57dc9a57 4295 goto out;
4f390c15 4296
57dc9a57
TM		 4297 status = -ENOMEM;
4298 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
4299 if (data == NULL)
4300 goto out;
4301
4302 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
4303 data->arg.u.symlink.pages = &page;
4304 data->arg.u.symlink.len = len;
1775fd3e 4305 data->arg.label = label;
1da177e4 4306
57dc9a57
TM		 4307 status = nfs4_do_create(dir, dentry, data);
4308
4309 nfs4_free_createdata(data);
4310out:
1da177e4
LT		 4311 return status;
4312}
4313
4f390c15 4314static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 4315 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 4316{
4317 struct nfs4_exception exception = { };
aa9c2669 4318 struct nfs4_label l, *label = NULL;
1da177e4 4319 int err;
aa9c2669
DQ		 4320
4321 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4322
1da177e4 4323 do {
078ea3df
TM		 4324 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4325 trace_nfs4_symlink(dir, &dentry->d_name, err);
4326 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4327 &exception);
4328 } while (exception.retry);
aa9c2669
DQ		 4329
4330 nfs4_label_release_security(label);
1da177e4
LT		 4331 return err;
4332}
4333
4334static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 4335 struct iattr *sattr, struct nfs4_label *label)
1da177e4 4336{
57dc9a57
TM		 4337 struct nfs4_createdata *data;
4338 int status = -ENOMEM;
1da177e4 4339
57dc9a57
TM		 4340 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4341 if (data == NULL)
4342 goto out;
4343
1775fd3e 4344 data->arg.label = label;
57dc9a57
TM		 4345 status = nfs4_do_create(dir, dentry, data);
4346
4347 nfs4_free_createdata(data);
4348out:
1da177e4
LT		 4349 return status;
4350}
4351
4352static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4353 struct iattr *sattr)
4354{
dff25ddb 4355 struct nfs_server *server = NFS_SERVER(dir);
1da177e4 4356 struct nfs4_exception exception = { };
aa9c2669 4357 struct nfs4_label l, *label = NULL;
1da177e4 4358 int err;
a8a5da99 4359
aa9c2669
DQ		 4360 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4361
dff25ddb
AG		 4362 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4363 sattr->ia_mode &= ~current_umask();
1da177e4 4364 do {
078ea3df
TM		 4365 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4366 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4367 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4368 &exception);
4369 } while (exception.retry);
aa9c2669
DQ		 4370 nfs4_label_release_security(label);
4371
1da177e4
LT		 4372 return err;
4373}
4374
4375static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4376 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4 4377{
2b0143b5 4378 struct inode *dir = d_inode(dentry);
1da177e4
LT		 4379 struct nfs4_readdir_arg args = {
4380 .fh = NFS_FH(dir),
56e4ebf8 4381 .pages = pages,
1da177e4
LT		 4382 .pgbase = 0,
4383 .count = count,
2b0143b5 4384 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 4385 .plus = plus,
1da177e4
LT		 4386 };
4387 struct nfs4_readdir_res res;
4388 struct rpc_message msg = {
4389 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4390 .rpc_argp = &args,
4391 .rpc_resp = &res,
4392 .rpc_cred = cred,
4393 };
4394 int status;
4395
6de1472f
AV		 4396 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4397 dentry,
eadf4598 4398 (unsigned long long)cookie);
c3f52af3 4399 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 4400 res.pgbase = args.pgbase;
7c513058 4401 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 4402 if (status >= 0) {
c3f52af3 4403 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 4404 status += args.pgbase;
4405 }
c4812998
TM		 4406
4407 nfs_invalidate_atime(dir);
4408
3110ff80 4409 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 4410 return status;
4411}
4412
4413static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4414 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 4415{
4416 struct nfs4_exception exception = { };
4417 int err;
4418 do {
c1578b76
TM		 4419 err = _nfs4_proc_readdir(dentry, cred, cookie,
4420 pages, count, plus);
2b0143b5
DH		 4421 trace_nfs4_readdir(d_inode(dentry), err);
4422 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 4423 &exception);
4424 } while (exception.retry);
4425 return err;
4426}
4427
4428static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 4429 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 4430{
57dc9a57
TM		 4431 struct nfs4_createdata *data;
4432 int mode = sattr->ia_mode;
4433 int status = -ENOMEM;
1da177e4 4434
57dc9a57
TM		 4435 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4436 if (data == NULL)
4437 goto out;
4438
1da177e4 4439 if (S_ISFIFO(mode))
57dc9a57 4440 data->arg.ftype = NF4FIFO;
1da177e4 4441 else if (S_ISBLK(mode)) {
57dc9a57
TM		 4442 data->arg.ftype = NF4BLK;
4443 data->arg.u.device.specdata1 = MAJOR(rdev);
4444 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 4445 }
4446 else if (S_ISCHR(mode)) {
57dc9a57
TM		 4447 data->arg.ftype = NF4CHR;
4448 data->arg.u.device.specdata1 = MAJOR(rdev);
4449 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 4450 } else if (!S_ISSOCK(mode)) {
4451 status = -EINVAL;
4452 goto out_free;
1da177e4 4453 }
1775fd3e 4454
aa9c2669 4455 data->arg.label = label;
57dc9a57 4456 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 4457out_free:
57dc9a57
TM		 4458 nfs4_free_createdata(data);
4459out:
1da177e4
LT		 4460 return status;
4461}
4462
4463static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4464 struct iattr *sattr, dev_t rdev)
4465{
dff25ddb 4466 struct nfs_server *server = NFS_SERVER(dir);
1da177e4 4467 struct nfs4_exception exception = { };
aa9c2669 4468 struct nfs4_label l, *label = NULL;
1da177e4 4469 int err;
a8a5da99 4470
aa9c2669
DQ		 4471 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4472
dff25ddb
AG		 4473 if (!(server->attr_bitmask[2] & FATTR4_WORD2_MODE_UMASK))
4474 sattr->ia_mode &= ~current_umask();
1da177e4 4475 do {
078ea3df
TM		 4476 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4477 trace_nfs4_mknod(dir, &dentry->d_name, err);
4478 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4479 &exception);
4480 } while (exception.retry);
aa9c2669
DQ		 4481
4482 nfs4_label_release_security(label);
4483
1da177e4
LT		 4484 return err;
4485}
4486
4487static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4488 struct nfs_fsstat *fsstat)
4489{
4490 struct nfs4_statfs_arg args = {
4491 .fh = fhandle,
4492 .bitmask = server->attr_bitmask,
4493 };
24ad148a
BH		 4494 struct nfs4_statfs_res res = {
4495 .fsstat = fsstat,
4496 };
1da177e4
LT		 4497 struct rpc_message msg = {
4498 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4499 .rpc_argp = &args,
24ad148a 4500 .rpc_resp = &res,
1da177e4
LT		 4501 };
4502
0e574af1 4503 nfs_fattr_init(fsstat->fattr);
7c513058 4504 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4505}
4506
4507static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4508{
4509 struct nfs4_exception exception = { };
4510 int err;
4511 do {
4512 err = nfs4_handle_exception(server,
4513 _nfs4_proc_statfs(server, fhandle, fsstat),
4514 &exception);
4515 } while (exception.retry);
4516 return err;
4517}
4518
4519static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4520 struct nfs_fsinfo *fsinfo)
4521{
4522 struct nfs4_fsinfo_arg args = {
4523 .fh = fhandle,
4524 .bitmask = server->attr_bitmask,
4525 };
3dda5e43
BH		 4526 struct nfs4_fsinfo_res res = {
4527 .fsinfo = fsinfo,
4528 };
1da177e4
LT		 4529 struct rpc_message msg = {
4530 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4531 .rpc_argp = &args,
3dda5e43 4532 .rpc_resp = &res,
1da177e4
LT		 4533 };
4534
7c513058 4535 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4536}
4537
4538static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4539{
4540 struct nfs4_exception exception = { };
83ca7f5a 4541 unsigned long now = jiffies;
1da177e4
LT		 4542 int err;
4543
4544 do {
83ca7f5a 4545 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4546 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a 4547 if (err == 0) {
fb10fb67
TM		 4548 nfs4_set_lease_period(server->nfs_client,
4549 fsinfo->lease_time * HZ,
4550 now);
83ca7f5a
CL		 4551 break;
4552 }
4553 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4554 } while (exception.retry);
4555 return err;
4556}
4557
4558static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4559{
e38eb650
BS		 4560 int error;
4561
0e574af1 4562 nfs_fattr_init(fsinfo->fattr);
e38eb650 4563 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4564 if (error == 0) {
4565 /* block layout checks this! */
4566 server->pnfs_blksize = fsinfo->blksize;
ca440c38 4567 set_pnfs_layoutdriver(server, fhandle, fsinfo);
dc182549 4568 }
e38eb650
BS		 4569
4570 return error;
1da177e4
LT		 4571}
4572
4573static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4574 struct nfs_pathconf *pathconf)
4575{
4576 struct nfs4_pathconf_arg args = {
4577 .fh = fhandle,
4578 .bitmask = server->attr_bitmask,
4579 };
d45b2989
BH		 4580 struct nfs4_pathconf_res res = {
4581 .pathconf = pathconf,
4582 };
1da177e4
LT		 4583 struct rpc_message msg = {
4584 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4585 .rpc_argp = &args,
d45b2989 4586 .rpc_resp = &res,
1da177e4
LT		 4587 };
4588
4589 /* None of the pathconf attributes are mandatory to implement */
4590 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4591 memset(pathconf, 0, sizeof(*pathconf));
4592 return 0;
4593 }
4594
0e574af1 4595 nfs_fattr_init(pathconf->fattr);
7c513058 4596 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4597}
4598
4599static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4600 struct nfs_pathconf *pathconf)
4601{
4602 struct nfs4_exception exception = { };
4603 int err;
4604
4605 do {
4606 err = nfs4_handle_exception(server,
4607 _nfs4_proc_pathconf(server, fhandle, pathconf),
4608 &exception);
4609 } while (exception.retry);
4610 return err;
4611}
4612
5521abfd 4613int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4614 const struct nfs_open_context *ctx,
4615 const struct nfs_lock_context *l_ctx,
4616 fmode_t fmode)
4617{
17393475 4618 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL);
9b206149
TM		 4619}
4620EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4621
5521abfd
TM		 4622static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4623 const struct nfs_open_context *ctx,
4624 const struct nfs_lock_context *l_ctx,
4625 fmode_t fmode)
4626{
4627 nfs4_stateid current_stateid;
4628
e1253be0
TM		 4629 /* If the current stateid represents a lost lock, then exit */
4630 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4631 return true;
5521abfd
TM		 4632 return nfs4_stateid_match(stateid, &current_stateid);
4633}
4634
4635static bool nfs4_error_stateid_expired(int err)
4636{
4637 switch (err) {
4638 case -NFS4ERR_DELEG_REVOKED:
4639 case -NFS4ERR_ADMIN_REVOKED:
4640 case -NFS4ERR_BAD_STATEID:
4641 case -NFS4ERR_STALE_STATEID:
4642 case -NFS4ERR_OLD_STATEID:
4643 case -NFS4ERR_OPENMODE:
4644 case -NFS4ERR_EXPIRED:
4645 return true;
4646 }
4647 return false;
4648}
4649
d45f60c6 4650static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4651{
d45f60c6 4652 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4653
d45f60c6 4654 trace_nfs4_read(hdr, task->tk_status);
9c27869d
TM		 4655 if (task->tk_status < 0) {
4656 struct nfs4_exception exception = {
4657 .inode = hdr->inode,
4658 .state = hdr->args.context->state,
4659 .stateid = &hdr->args.stateid,
4660 };
4661 task->tk_status = nfs4_async_handle_exception(task,
4662 server, task->tk_status, &exception);
4663 if (exception.retry) {
4664 rpc_restart_call_prepare(task);
4665 return -EAGAIN;
4666 }
1da177e4 4667 }
8850df99 4668
1da177e4 4669 if (task->tk_status > 0)
d45f60c6 4670 renew_lease(server, hdr->timestamp);
ec06c096 4671 return 0;
1da177e4
LT		 4672}
4673
5521abfd 4674static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4675 struct nfs_pgio_args *args)
5521abfd
TM		 4676{
4677
4678 if (!nfs4_error_stateid_expired(task->tk_status) ||
4679 nfs4_stateid_is_current(&args->stateid,
4680 args->context,
4681 args->lock_context,
4682 FMODE_READ))
4683 return false;
4684 rpc_restart_call_prepare(task);
4685 return true;
4686}
4687
d45f60c6 4688static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4689{
4690
4691 dprintk("--> %s\n", __func__);
4692
d45f60c6 4693 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4694 return -EAGAIN;
d45f60c6 4695 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4696 return -EAGAIN;
bfc505de
TM		 4697 if (task->tk_status > 0)
4698 nfs_invalidate_atime(hdr->inode);
d45f60c6
WAA		 4699 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4700 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4701}
4702
d45f60c6
WAA		 4703static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4704 struct rpc_message *msg)
1da177e4 4705{
d45f60c6 4706 hdr->timestamp = jiffies;
ca857cc1
TM		 4707 if (!hdr->pgio_done_cb)
4708 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4709 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4710 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4711}
4712
d45f60c6
WAA		 4713static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4714 struct nfs_pgio_header *hdr)
ea7c3303 4715{
d45f60c6
WAA		 4716 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4717 &hdr->args.seq_args,
4718 &hdr->res.seq_res,
9b206149 4719 task))
ef1820f9 4720 return 0;
d45f60c6
WAA		 4721 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4722 hdr->args.lock_context,
4723 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4724 return -EIO;
d45f60c6 4725 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4726 return -EIO;
4727 return 0;
1da177e4
LT		 4728}
4729
d45f60c6
WAA		 4730static int nfs4_write_done_cb(struct rpc_task *task,
4731 struct nfs_pgio_header *hdr)
1da177e4 4732{
d45f60c6 4733 struct inode *inode = hdr->inode;
8478eaa1 4734
d45f60c6 4735 trace_nfs4_write(hdr, task->tk_status);
9c27869d
TM		 4736 if (task->tk_status < 0) {
4737 struct nfs4_exception exception = {
4738 .inode = hdr->inode,
4739 .state = hdr->args.context->state,
4740 .stateid = &hdr->args.stateid,
4741 };
4742 task->tk_status = nfs4_async_handle_exception(task,
4743 NFS_SERVER(inode), task->tk_status,
4744 &exception);
4745 if (exception.retry) {
4746 rpc_restart_call_prepare(task);
4747 return -EAGAIN;
4748 }
1da177e4 4749 }
4f9838c7 4750 if (task->tk_status >= 0) {
d45f60c6 4751 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4752 nfs_writeback_update_inode(hdr);
4f9838c7 4753 }
788e7a89 4754 return 0;
1da177e4
LT		 4755}
4756
5521abfd 4757static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4758 struct nfs_pgio_args *args)
5521abfd
TM		 4759{
4760
4761 if (!nfs4_error_stateid_expired(task->tk_status) ||
4762 nfs4_stateid_is_current(&args->stateid,
4763 args->context,
4764 args->lock_context,
4765 FMODE_WRITE))
4766 return false;
4767 rpc_restart_call_prepare(task);
4768 return true;
4769}
4770
d45f60c6 4771static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4772{
d45f60c6 4773 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4774 return -EAGAIN;
d45f60c6 4775 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4776 return -EAGAIN;
d45f60c6
WAA		 4777 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4778 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4779}
4780
5a37f851 4781static
d45f60c6 4782bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4783{
5a37f851 4784 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4785 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4786 return false;
4787 /* Otherwise, request attributes if and only if we don't hold
4788 * a delegation
4789 */
011e2a7f 4790 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4791}
a69aef14 4792
d45f60c6
WAA		 4793static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4794 struct rpc_message *msg)
1da177e4 4795{
d45f60c6 4796 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4797
d45f60c6
WAA		 4798 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4799 hdr->args.bitmask = NULL;
4800 hdr->res.fattr = NULL;
7ffd1064 4801 } else
d45f60c6 4802 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4803
d45f60c6
WAA		 4804 if (!hdr->pgio_done_cb)
4805 hdr->pgio_done_cb = nfs4_write_done_cb;
4806 hdr->res.server = server;
4807 hdr->timestamp = jiffies;
1da177e4 4808
bdc7f021 4809 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4810 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4811}
4812
0b7c0153 4813static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4814{
d9afbd1b
TM		 4815 nfs4_setup_sequence(NFS_SERVER(data->inode),
4816 &data->args.seq_args,
4817 &data->res.seq_res,
4818 task);
1da177e4
LT		 4819}
4820
0b7c0153 4821static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4822{
1da177e4 4823 struct inode *inode = data->inode;
14516c3a 4824
cc668ab3 4825 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4826 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4827 NULL, NULL) == -EAGAIN) {
d00c5d43 4828 rpc_restart_call_prepare(task);
788e7a89 4829 return -EAGAIN;
1da177e4 4830 }
788e7a89 4831 return 0;
1da177e4
LT		 4832}
4833
0b7c0153 4834static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4835{
4836 if (!nfs4_sequence_done(task, &data->res.seq_res))
4837 return -EAGAIN;
0b7c0153 4838 return data->commit_done_cb(task, data);
5f452431
FI		 4839}
4840
0b7c0153 4841static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4842{
788e7a89 4843 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4844
0b7c0153
FI		 4845 if (data->commit_done_cb == NULL)
4846 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4847 data->res.server = server;
bdc7f021 4848 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4849 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4850}
4851
9bc4e3ca
CL		 4852struct nfs4_renewdata {
4853 struct nfs_client *client;
4854 unsigned long timestamp;
4855};
4856
1da177e4
LT		 4857/*
4858 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4859 * standalone procedure for queueing an asynchronous RENEW.
4860 */
9bc4e3ca 4861static void nfs4_renew_release(void *calldata)
dc96aef9 4862{
9bc4e3ca
CL		 4863 struct nfs4_renewdata *data = calldata;
4864 struct nfs_client *clp = data->client;
dc96aef9 4865
0851de06
AB		 4866 if (atomic_read(&clp->cl_count) > 1)
4867 nfs4_schedule_state_renewal(clp);
4868 nfs_put_client(clp);
9bc4e3ca 4869 kfree(data);
dc96aef9
AB		 4870}
4871
9bc4e3ca 4872static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4873{
9bc4e3ca
CL		 4874 struct nfs4_renewdata *data = calldata;
4875 struct nfs_client *clp = data->client;
4876 unsigned long timestamp = data->timestamp;
1da177e4 4877
c6d01c6f 4878 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4879 switch (task->tk_status) {
4880 case 0:
4881 break;
4882 case -NFS4ERR_LEASE_MOVED:
4883 nfs4_schedule_lease_moved_recovery(clp);
4884 break;
4885 default:
95baa25c 4886 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4887 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4888 return;
4889 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4890 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4891 return;
4892 }
4893 nfs4_schedule_path_down_recovery(clp);
1da177e4 4894 }
452e9352 4895 do_renew_lease(clp, timestamp);
1da177e4
LT		 4896}
4897
963d8fe5
TM		 4898static const struct rpc_call_ops nfs4_renew_ops = {
4899 .rpc_call_done = nfs4_renew_done,
dc96aef9 4900 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4901};
4902
2f60ea6b 4903static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
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 4909 };
9bc4e3ca 4910 struct nfs4_renewdata *data;
1da177e4 4911
2f60ea6b
TM		 4912 if (renew_flags == 0)
4913 return 0;
0851de06
AB		 4914 if (!atomic_inc_not_zero(&clp->cl_count))
4915 return -EIO;
b569ad34 4916 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4917 if (data == NULL)
4918 return -ENOMEM;
4919 data->client = clp;
4920 data->timestamp = jiffies;
bc7a05ca 4921 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4922 &nfs4_renew_ops, data);
1da177e4
LT		 4923}
4924
8534d4ec 4925static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4926{
4927 struct rpc_message msg = {
4928 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4929 .rpc_argp = clp,
b4454fe1 4930 .rpc_cred = cred,
1da177e4
LT		 4931 };
4932 unsigned long now = jiffies;
4933 int status;
4934
bc7a05ca 4935 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4936 if (status < 0)
4937 return status;
452e9352 4938 do_renew_lease(clp, now);
1da177e4
LT		 4939 return 0;
4940}
4941
aa1870af
BF		 4942static inline int nfs4_server_supports_acls(struct nfs_server *server)
4943{
7dd7d959 4944 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4945}
4946
21f498c2
TM		 4947/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4948 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4949 * the stack.
4950 */
21f498c2 4951#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4952
e9e3d724 4953static int buf_to_pages_noslab(const void *buf, size_t buflen,
8fbcf237 4954 struct page **pages)
e9e3d724
NH		 4955{
4956 struct page *newpage, **spages;
4957 int rc = 0;
4958 size_t len;
4959 spages = pages;
4960
4961 do {
21f498c2 4962 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4963 newpage = alloc_page(GFP_KERNEL);
4964
4965 if (newpage == NULL)
4966 goto unwind;
4967 memcpy(page_address(newpage), buf, len);
4968 buf += len;
4969 buflen -= len;
4970 *pages++ = newpage;
4971 rc++;
4972 } while (buflen != 0);
4973
4974 return rc;
4975
4976unwind:
4977 for(; rc > 0; rc--)
4978 __free_page(spages[rc-1]);
4979 return -ENOMEM;
4980}
4981
e50a1c2e
BF		 4982struct nfs4_cached_acl {
4983 int cached;
4984 size_t len;
3e9d4154 4985 char data[0];
e50a1c2e
BF		 4986};
4987
4988static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4989{
4990 struct nfs_inode *nfsi = NFS_I(inode);
4991
4992 spin_lock(&inode->i_lock);
4993 kfree(nfsi->nfs4_acl);
4994 nfsi->nfs4_acl = acl;
4995 spin_unlock(&inode->i_lock);
4996}
4997
4998static void nfs4_zap_acl_attr(struct inode *inode)
4999{
5000 nfs4_set_cached_acl(inode, NULL);
5001}
5002
5003static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
5004{
5005 struct nfs_inode *nfsi = NFS_I(inode);
5006 struct nfs4_cached_acl *acl;
5007 int ret = -ENOENT;
5008
5009 spin_lock(&inode->i_lock);
5010 acl = nfsi->nfs4_acl;
5011 if (acl == NULL)
5012 goto out;
5013 if (buf == NULL) /* user is just asking for length */
5014 goto out_len;
5015 if (acl->cached == 0)
5016 goto out;
5017 ret = -ERANGE; /* see getxattr(2) man page */
5018 if (acl->len > buflen)
5019 goto out;
5020 memcpy(buf, acl->data, acl->len);
5021out_len:
5022 ret = acl->len;
5023out:
5024 spin_unlock(&inode->i_lock);
5025 return ret;
5026}
5027
5794d21e 5028static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 5029{
5030 struct nfs4_cached_acl *acl;
b291f1b1 5031 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 5032
1f1ea6c2 5033 if (buflen <= PAGE_SIZE) {
b291f1b1 5034 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 5035 if (acl == NULL)
5036 goto out;
5037 acl->cached = 1;
5794d21e 5038 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 5039 } else {
5040 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
5041 if (acl == NULL)
5042 goto out;
5043 acl->cached = 0;
5044 }
5045 acl->len = acl_len;
5046out:
5047 nfs4_set_cached_acl(inode, acl);
5048}
5049
bf118a34
AA		 5050/*
5051 * The getxattr API returns the required buffer length when called with a
5052 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
5053 * the required buf. On a NULL buf, we send a page of data to the server
5054 * guessing that the ACL request can be serviced by a page. If so, we cache
5055 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
5056 * the cache. If not so, we throw away the page, and cache the required
5057 * length. The next getxattr call will then produce another round trip to
5058 * the server, this time with the input buf of the required size.
5059 */
16b4289c 5060static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 5061{
bf118a34 5062 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 5063 struct nfs_getaclargs args = {
5064 .fh = NFS_FH(inode),
5065 .acl_pages = pages,
5066 .acl_len = buflen,
5067 };
663c79b3
BH		 5068 struct nfs_getaclres res = {
5069 .acl_len = buflen,
5070 };
aa1870af
BF		 5071 struct rpc_message msg = {
5072 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
5073 .rpc_argp = &args,
663c79b3 5074 .rpc_resp = &res,
aa1870af 5075 };
21f498c2
TM		 5076 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
5077 int ret = -ENOMEM, i;
aa1870af 5078
bf118a34
AA		 5079 /* As long as we're doing a round trip to the server anyway,
5080 * let's be prepared for a page of acl data. */
5081 if (npages == 0)
5082 npages = 1;
21f498c2
TM		 5083 if (npages > ARRAY_SIZE(pages))
5084 return -ERANGE;
5a006899 5085
bf118a34
AA		 5086 for (i = 0; i < npages; i++) {
5087 pages[i] = alloc_page(GFP_KERNEL);
5088 if (!pages[i])
5089 goto out_free;
e50a1c2e 5090 }
5a006899
SP		 5091
5092 /* for decoding across pages */
5093 res.acl_scratch = alloc_page(GFP_KERNEL);
5094 if (!res.acl_scratch)
5095 goto out_free;
5096
bf118a34 5097 args.acl_len = npages * PAGE_SIZE;
5a006899 5098
de040bec 5099 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 5100 __func__, buf, buflen, npages, args.acl_len);
5101 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
5102 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 5103 if (ret)
5104 goto out_free;
bf118a34 5105
1f1ea6c2
TM		 5106 /* Handle the case where the passed-in buffer is too short */
5107 if (res.acl_flags & NFS4_ACL_TRUNC) {
5108 /* Did the user only issue a request for the acl length? */
5109 if (buf == NULL)
5110 goto out_ok;
e50a1c2e 5111 ret = -ERANGE;
1f1ea6c2 5112 goto out_free;
e50a1c2e 5113 }
1f1ea6c2 5114 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 5115 if (buf) {
5116 if (res.acl_len > buflen) {
5117 ret = -ERANGE;
5118 goto out_free;
5119 }
1f1ea6c2 5120 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 5121 }
1f1ea6c2
TM		 5122out_ok:
5123 ret = res.acl_len;
e50a1c2e 5124out_free:
bf118a34
AA		 5125 for (i = 0; i < npages; i++)
5126 if (pages[i])
5127 __free_page(pages[i]);
331818f1
TM		 5128 if (res.acl_scratch)
5129 __free_page(res.acl_scratch);
aa1870af
BF		 5130 return ret;
5131}
5132
16b4289c
TM		 5133static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5134{
5135 struct nfs4_exception exception = { };
5136 ssize_t ret;
5137 do {
5138 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 5139 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 5140 if (ret >= 0)
5141 break;
5142 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
5143 } while (exception.retry);
5144 return ret;
5145}
5146
e50a1c2e
BF		 5147static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
5148{
5149 struct nfs_server *server = NFS_SERVER(inode);
5150 int ret;
5151
5152 if (!nfs4_server_supports_acls(server))
5153 return -EOPNOTSUPP;
5154 ret = nfs_revalidate_inode(server, inode);
5155 if (ret < 0)
5156 return ret;
08a22b39
AK		 5157 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
5158 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 5159 ret = nfs4_read_cached_acl(inode, buf, buflen);
5160 if (ret != -ENOENT)
bf118a34
AA		 5161 /* -ENOENT is returned if there is no ACL or if there is an ACL
5162 * but no cached acl data, just the acl length */
e50a1c2e
BF		 5163 return ret;
5164 return nfs4_get_acl_uncached(inode, buf, buflen);
5165}
5166
16b4289c 5167static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 5168{
5169 struct nfs_server *server = NFS_SERVER(inode);
5170 struct page *pages[NFS4ACL_MAXPAGES];
5171 struct nfs_setaclargs arg = {
5172 .fh = NFS_FH(inode),
5173 .acl_pages = pages,
5174 .acl_len = buflen,
5175 };
73c403a9 5176 struct nfs_setaclres res;
4b580ee3
BF		 5177 struct rpc_message msg = {
5178 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
5179 .rpc_argp = &arg,
73c403a9 5180 .rpc_resp = &res,
4b580ee3 5181 };
21f498c2 5182 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 5183 int ret, i;
4b580ee3
BF		 5184
5185 if (!nfs4_server_supports_acls(server))
5186 return -EOPNOTSUPP;
21f498c2
TM		 5187 if (npages > ARRAY_SIZE(pages))
5188 return -ERANGE;
8fbcf237 5189 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
e9e3d724
NH		 5190 if (i < 0)
5191 return i;
57ec14c5 5192 nfs4_inode_return_delegation(inode);
7c513058 5193 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 5194
5195 /*
5196 * Free each page after tx, so the only ref left is
5197 * held by the network stack
5198 */
5199 for (; i > 0; i--)
5200 put_page(pages[i-1]);
5201
08a22b39
AK		 5202 /*
5203 * Acl update can result in inode attribute update.
5204 * so mark the attribute cache invalid.
5205 */
5206 spin_lock(&inode->i_lock);
5207 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
5208 spin_unlock(&inode->i_lock);
f41f7418
TM		 5209 nfs_access_zap_cache(inode);
5210 nfs_zap_acl_cache(inode);
4b580ee3
BF		 5211 return ret;
5212}
5213
16b4289c
TM		 5214static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5215{
5216 struct nfs4_exception exception = { };
5217 int err;
5218 do {
c1578b76
TM		 5219 err = __nfs4_proc_set_acl(inode, buf, buflen);
5220 trace_nfs4_set_acl(inode, err);
5221 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 5222 &exception);
5223 } while (exception.retry);
5224 return err;
5225}
5226
aa9c2669
DQ		 5227#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5228static int _nfs4_get_security_label(struct inode *inode, void *buf,
5229 size_t buflen)
5230{
5231 struct nfs_server *server = NFS_SERVER(inode);
5232 struct nfs_fattr fattr;
5233 struct nfs4_label label = {0, 0, buflen, buf};
5234
5235 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 5236 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 5237 .fh = NFS_FH(inode),
5238 .bitmask = bitmask,
5239 };
5240 struct nfs4_getattr_res res = {
5241 .fattr = &fattr,
5242 .label = &label,
5243 .server = server,
5244 };
5245 struct rpc_message msg = {
5246 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 5247 .rpc_argp = &arg,
aa9c2669
DQ		 5248 .rpc_resp = &res,
5249 };
5250 int ret;
5251
5252 nfs_fattr_init(&fattr);
5253
fcb63a9b 5254 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 5255 if (ret)
5256 return ret;
5257 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
5258 return -ENOENT;
5259 if (buflen < label.len)
5260 return -ERANGE;
5261 return 0;
5262}
5263
5264static int nfs4_get_security_label(struct inode *inode, void *buf,
5265 size_t buflen)
5266{
5267 struct nfs4_exception exception = { };
5268 int err;
5269
5270 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5271 return -EOPNOTSUPP;
5272
5273 do {
c1578b76
TM		 5274 err = _nfs4_get_security_label(inode, buf, buflen);
5275 trace_nfs4_get_security_label(inode, err);
5276 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5277 &exception);
5278 } while (exception.retry);
5279 return err;
5280}
5281
5282static int _nfs4_do_set_security_label(struct inode *inode,
5283 struct nfs4_label *ilabel,
5284 struct nfs_fattr *fattr,
5285 struct nfs4_label *olabel)
5286{
5287
5288 struct iattr sattr = {0};
5289 struct nfs_server *server = NFS_SERVER(inode);
5290 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 5291 struct nfs_setattrargs arg = {
aa9c2669
DQ		 5292 .fh = NFS_FH(inode),
5293 .iap = &sattr,
5294 .server = server,
5295 .bitmask = bitmask,
5296 .label = ilabel,
5297 };
5298 struct nfs_setattrres res = {
5299 .fattr = fattr,
5300 .label = olabel,
5301 .server = server,
5302 };
5303 struct rpc_message msg = {
5304 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 5305 .rpc_argp = &arg,
aa9c2669
DQ		 5306 .rpc_resp = &res,
5307 };
5308 int status;
5309
12207f69 5310 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 5311
12207f69 5312 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 5313 if (status)
5314 dprintk("%s failed: %d\n", __func__, status);
5315
5316 return status;
5317}
5318
5319static int nfs4_do_set_security_label(struct inode *inode,
5320 struct nfs4_label *ilabel,
5321 struct nfs_fattr *fattr,
5322 struct nfs4_label *olabel)
5323{
5324 struct nfs4_exception exception = { };
5325 int err;
5326
5327 do {
c1578b76
TM		 5328 err = _nfs4_do_set_security_label(inode, ilabel,
5329 fattr, olabel);
5330 trace_nfs4_set_security_label(inode, err);
5331 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5332 &exception);
5333 } while (exception.retry);
5334 return err;
5335}
5336
5337static int
59301226 5338nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
aa9c2669
DQ		 5339{
5340 struct nfs4_label ilabel, *olabel = NULL;
5341 struct nfs_fattr fattr;
5342 struct rpc_cred *cred;
aa9c2669
DQ		 5343 int status;
5344
5345 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5346 return -EOPNOTSUPP;
5347
5348 nfs_fattr_init(&fattr);
5349
5350 ilabel.pi = 0;
5351 ilabel.lfs = 0;
5352 ilabel.label = (char *)buf;
5353 ilabel.len = buflen;
5354
5355 cred = rpc_lookup_cred();
5356 if (IS_ERR(cred))
5357 return PTR_ERR(cred);
5358
5359 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5360 if (IS_ERR(olabel)) {
5361 status = -PTR_ERR(olabel);
5362 goto out;
5363 }
5364
5365 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5366 if (status == 0)
5367 nfs_setsecurity(inode, &fattr, olabel);
5368
5369 nfs4_label_free(olabel);
5370out:
5371 put_rpccred(cred);
5372 return status;
5373}
5374#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5375
5376
f092075d
CL		 5377static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5378 nfs4_verifier *bootverf)
cd93710e
CL		 5379{
5380 __be32 verf[2];
5381
2c820d9a
CL		 5382 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5383 /* An impossible timestamp guarantees this value
5384 * will never match a generated boot time. */
2f86e091
DD		 5385 verf[0] = cpu_to_be32(U32_MAX);
5386 verf[1] = cpu_to_be32(U32_MAX);
2c820d9a 5387 } else {
f092075d 5388 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
2f86e091
DD		 5389 u64 ns = ktime_to_ns(nn->boot_time);
5390
5391 verf[0] = cpu_to_be32(ns >> 32);
5392 verf[1] = cpu_to_be32(ns);
2c820d9a 5393 }
cd93710e
CL		 5394 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5395}
5396
a3192688
JL		 5397static int
5398nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 5399{
a3192688
JL		 5400 size_t len;
5401 char *str;
e984a55a 5402
ceb3a16c 5403 if (clp->cl_owner_id != NULL)
a3192688 5404 return 0;
4a3e5779 5405
a3192688 5406 rcu_read_lock();
4a70316c 5407 len = 14 + strlen(clp->cl_ipaddr) + 1 +
a3192688
JL		 5408 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5409 1 +
5410 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5411 1;
5412 rcu_read_unlock();
5413
5414 if (len > NFS4_OPAQUE_LIMIT + 1)
5415 return -EINVAL;
5416
5417 /*
5418 * Since this string is allocated at mount time, and held until the
5419 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5420 * about a memory-reclaim deadlock.
5421 */
5422 str = kmalloc(len, GFP_KERNEL);
5423 if (!str)
5424 return -ENOMEM;
ceb3a16c 5425
e984a55a 5426 rcu_read_lock();
f2dd436e 5427 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
a3192688
JL		 5428 clp->cl_ipaddr,
5429 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5430 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5431 rcu_read_unlock();
a3192688 5432
a3192688
JL		 5433 clp->cl_owner_id = str;
5434 return 0;
e984a55a
CL		 5435}
5436
873e3851
JL		 5437static int
5438nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5439{
873e3851
JL		 5440 size_t len;
5441 char *str;
5442
5443 len = 10 + 10 + 1 + 10 + 1 +
5444 strlen(nfs4_client_id_uniquifier) + 1 +
5445 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5446
5447 if (len > NFS4_OPAQUE_LIMIT + 1)
5448 return -EINVAL;
5449
5450 /*
5451 * Since this string is allocated at mount time, and held until the
5452 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5453 * about a memory-reclaim deadlock.
5454 */
5455 str = kmalloc(len, GFP_KERNEL);
5456 if (!str)
5457 return -ENOMEM;
5458
f2dd436e 5459 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
873e3851
JL		 5460 clp->rpc_ops->version, clp->cl_minorversion,
5461 nfs4_client_id_uniquifier,
5462 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5463 clp->cl_owner_id = str;
5464 return 0;
5465}
5466
5467static int
5468nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5469{
873e3851
JL		 5470 size_t len;
5471 char *str;
ceb3a16c
TM		 5472
5473 if (clp->cl_owner_id != NULL)
873e3851 5474 return 0;
6f2ea7f2
CL		 5475
5476 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5477 return nfs4_init_uniquifier_client_string(clp);
5478
5479 len = 10 + 10 + 1 + 10 + 1 +
5480 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5481
5482 if (len > NFS4_OPAQUE_LIMIT + 1)
5483 return -EINVAL;
5484
5485 /*
5486 * Since this string is allocated at mount time, and held until the
5487 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5488 * about a memory-reclaim deadlock.
5489 */
5490 str = kmalloc(len, GFP_KERNEL);
5491 if (!str)
5492 return -ENOMEM;
5493
f2dd436e 5494 scnprintf(str, len, "Linux NFSv%u.%u %s",
873e3851
JL		 5495 clp->rpc_ops->version, clp->cl_minorversion,
5496 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5497 clp->cl_owner_id = str;
5498 return 0;
e984a55a
CL		 5499}
5500
706cb8db
CL		 5501/*
5502 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5503 * services. Advertise one based on the address family of the
5504 * clientaddr.
5505 */
5506static unsigned int
5507nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5508{
5509 if (strchr(clp->cl_ipaddr, ':') != NULL)
5510 return scnprintf(buf, len, "tcp6");
5511 else
5512 return scnprintf(buf, len, "tcp");
5513}
5514
f11b2a1c
JL		 5515static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5516{
5517 struct nfs4_setclientid *sc = calldata;
5518
5519 if (task->tk_status == 0)
5520 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5521}
5522
5523static const struct rpc_call_ops nfs4_setclientid_ops = {
5524 .rpc_call_done = nfs4_setclientid_done,
5525};
5526
6bbb4ae8
CL		 5527/**
5528 * nfs4_proc_setclientid - Negotiate client ID
5529 * @clp: state data structure
5530 * @program: RPC program for NFSv4 callback service
5531 * @port: IP port number for NFS4 callback service
5532 * @cred: RPC credential to use for this call
5533 * @res: where to place the result
5534 *
5535 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5536 */
bb8b27e5
TM		 5537int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5538 unsigned short port, struct rpc_cred *cred,
5539 struct nfs4_setclientid_res *res)
1da177e4
LT		 5540{
5541 nfs4_verifier sc_verifier;
5542 struct nfs4_setclientid setclientid = {
5543 .sc_verifier = &sc_verifier,
5544 .sc_prog = program,
3a6bb738 5545 .sc_clnt = clp,
1da177e4
LT		 5546 };
5547 struct rpc_message msg = {
5548 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5549 .rpc_argp = &setclientid,
bb8b27e5 5550 .rpc_resp = res,
286d7d6a 5551 .rpc_cred = cred,
1da177e4 5552 };
f11b2a1c
JL		 5553 struct rpc_task *task;
5554 struct rpc_task_setup task_setup_data = {
5555 .rpc_client = clp->cl_rpcclient,
5556 .rpc_message = &msg,
5557 .callback_ops = &nfs4_setclientid_ops,
5558 .callback_data = &setclientid,
5559 .flags = RPC_TASK_TIMEOUT,
5560 };
6bbb4ae8 5561 int status;
1da177e4 5562
de734831 5563 /* nfs_client_id4 */
f092075d 5564 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5565
5566 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5567 status = nfs4_init_uniform_client_string(clp);
5568 else
a3192688 5569 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5570
5571 if (status)
5572 goto out;
3a6bb738 5573
de734831 5574 /* cb_client4 */
706cb8db
CL		 5575 setclientid.sc_netid_len =
5576 nfs4_init_callback_netid(clp,
5577 setclientid.sc_netid,
5578 sizeof(setclientid.sc_netid));
de734831 5579 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5580 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5581 clp->cl_ipaddr, port >> 8, port & 255);
5582
3a6bb738 5583 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5584 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5585 clp->cl_owner_id);
f11b2a1c
JL		 5586 task = rpc_run_task(&task_setup_data);
5587 if (IS_ERR(task)) {
5588 status = PTR_ERR(task);
5589 goto out;
5590 }
5591 status = task->tk_status;
5592 if (setclientid.sc_cred) {
5593 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5594 put_rpccred(setclientid.sc_cred);
5595 }
5596 rpc_put_task(task);
5597out:
c6d01c6f 5598 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5599 dprintk("NFS reply setclientid: %d\n", status);
5600 return status;
1da177e4
LT		 5601}
5602
6bbb4ae8
CL		 5603/**
5604 * nfs4_proc_setclientid_confirm - Confirm client ID
5605 * @clp: state data structure
5606 * @res: result of a previous SETCLIENTID
5607 * @cred: RPC credential to use for this call
5608 *
5609 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5610 */
fd954ae1 5611int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5612 struct nfs4_setclientid_res *arg,
5613 struct rpc_cred *cred)
1da177e4 5614{
1da177e4
LT		 5615 struct rpc_message msg = {
5616 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5617 .rpc_argp = arg,
286d7d6a 5618 .rpc_cred = cred,
1da177e4 5619 };
1da177e4
LT		 5620 int status;
5621
6bbb4ae8
CL		 5622 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5623 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5624 clp->cl_clientid);
1bd714f2 5625 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5626 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5627 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5628 return status;
5629}
5630
fe650407
TM		 5631struct nfs4_delegreturndata {
5632 struct nfs4_delegreturnargs args;
fa178f29 5633 struct nfs4_delegreturnres res;
fe650407
TM		 5634 struct nfs_fh fh;
5635 nfs4_stateid stateid;
26e976a8 5636 unsigned long timestamp;
586f1c39
TM		 5637 struct {
5638 struct nfs4_layoutreturn_args arg;
5639 struct nfs4_layoutreturn_res res;
4d796d75 5640 struct nfs4_xdr_opaque_data ld_private;
586f1c39
TM		 5641 u32 roc_barrier;
5642 bool roc;
5643 } lr;
fa178f29 5644 struct nfs_fattr fattr;
fe650407 5645 int rpc_status;
039b756a 5646 struct inode *inode;
fe650407
TM		 5647};
5648
fe650407
TM		 5649static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5650{
5651 struct nfs4_delegreturndata *data = calldata;
938e1010 5652
14516c3a
TM		 5653 if (!nfs4_sequence_done(task, &data->res.seq_res))
5654 return;
938e1010 5655
ca8acf8d 5656 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
586f1c39
TM		 5657
5658 /* Handle Layoutreturn errors */
5659 if (data->args.lr_args && task->tk_status != 0) {
5660 switch(data->res.lr_ret) {
5661 default:
5662 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
5663 break;
5664 case 0:
5665 data->args.lr_args = NULL;
5666 data->res.lr_res = NULL;
5667 break;
5668 case -NFS4ERR_ADMIN_REVOKED:
5669 case -NFS4ERR_DELEG_REVOKED:
5670 case -NFS4ERR_EXPIRED:
5671 case -NFS4ERR_BAD_STATEID:
5672 case -NFS4ERR_OLD_STATEID:
5673 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
5674 case -NFS4ERR_WRONG_CRED:
5675 data->args.lr_args = NULL;
5676 data->res.lr_res = NULL;
5677 data->res.lr_ret = 0;
5678 rpc_restart_call_prepare(task);
5679 return;
5680 }
5681 }
5682
79708861 5683 switch (task->tk_status) {
79708861 5684 case 0:
fa178f29 5685 renew_lease(data->res.server, data->timestamp);
23ea44c2 5686 break;
c97cf606
TM		 5687 case -NFS4ERR_ADMIN_REVOKED:
5688 case -NFS4ERR_DELEG_REVOKED:
26d36301
TM		 5689 case -NFS4ERR_EXPIRED:
5690 nfs4_free_revoked_stateid(data->res.server,
5691 data->args.stateid,
5692 task->tk_msg.rpc_cred);
c97cf606
TM		 5693 case -NFS4ERR_BAD_STATEID:
5694 case -NFS4ERR_OLD_STATEID:
5695 case -NFS4ERR_STALE_STATEID:
c97cf606
TM		 5696 task->tk_status = 0;
5697 break;
79708861 5698 default:
8478eaa1
N		 5699 if (nfs4_async_handle_error(task, data->res.server,
5700 NULL, NULL) == -EAGAIN) {
d00c5d43 5701 rpc_restart_call_prepare(task);
79708861
RL		 5702 return;
5703 }
5704 }
5705 data->rpc_status = task->tk_status;
fe650407
TM		 5706}
5707
5708static void nfs4_delegreturn_release(void *calldata)
5709{
039b756a 5710 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5711 struct inode *inode = data->inode;
039b756a 5712
ea7c38fe 5713 if (inode) {
586f1c39 5714 if (data->lr.roc)
1c5bd76d
TM		 5715 pnfs_roc_release(&data->lr.arg, &data->lr.res,
5716 data->res.lr_ret);
0bc2c9b4 5717 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
ea7c38fe
TM		 5718 nfs_iput_and_deactive(inode);
5719 }
fe650407
TM		 5720 kfree(calldata);
5721}
5722
938e1010
AA		 5723static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5724{
5725 struct nfs4_delegreturndata *d_data;
5726
5727 d_data = (struct nfs4_delegreturndata *)data;
5728
1c5bd76d 5729 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task))
500d701f
PT		 5730 return;
5731
d9afbd1b
TM		 5732 nfs4_setup_sequence(d_data->res.server,
5733 &d_data->args.seq_args,
5734 &d_data->res.seq_res,
5735 task);
938e1010 5736}
938e1010 5737
c8d149f3 5738static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5739 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5740 .rpc_call_done = nfs4_delegreturn_done,
5741 .rpc_release = nfs4_delegreturn_release,
5742};
5743
e6f81075 5744static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5745{
5746 struct nfs4_delegreturndata *data;
fa178f29 5747 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5748 struct rpc_task *task;
5138fde0
TM		 5749 struct rpc_message msg = {
5750 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5751 .rpc_cred = cred,
5752 };
c970aa85
TM		 5753 struct rpc_task_setup task_setup_data = {
5754 .rpc_client = server->client,
5138fde0 5755 .rpc_message = &msg,
c970aa85
TM		 5756 .callback_ops = &nfs4_delegreturn_ops,
5757 .flags = RPC_TASK_ASYNC,
5758 };
e6f81075 5759 int status = 0;
fe650407 5760
8535b2be 5761 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5762 if (data == NULL)
5763 return -ENOMEM;
a9c92d6b 5764 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
99ade3c7
AE		 5765
5766 nfs4_state_protect(server->nfs_client,
5767 NFS_SP4_MACH_CRED_CLEANUP,
5768 &task_setup_data.rpc_client, &msg);
5769
fe650407
TM		 5770 data->args.fhandle = &data->fh;
5771 data->args.stateid = &data->stateid;
9e907fec 5772 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5773 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5774 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5775 data->res.fattr = &data->fattr;
5776 data->res.server = server;
586f1c39 5777 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
4d796d75 5778 data->lr.arg.ld_private = &data->lr.ld_private;
5138fde0 5779 nfs_fattr_init(data->res.fattr);
26e976a8 5780 data->timestamp = jiffies;
fe650407 5781 data->rpc_status = 0;
53e6fc86 5782 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, cred);
ea7c38fe 5783 data->inode = nfs_igrab_and_active(inode);
1c5bd76d 5784 if (data->inode) {
1c5bd76d
TM		 5785 if (data->lr.roc) {
5786 data->args.lr_args = &data->lr.arg;
5787 data->res.lr_res = &data->lr.res;
5788 }
53e6fc86
TM		 5789 } else if (data->lr.roc) {
5790 pnfs_roc_release(&data->lr.arg, &data->lr.res, 0);
5791 data->lr.roc = false;
1c5bd76d 5792 }
fe650407 5793
c970aa85 5794 task_setup_data.callback_data = data;
1174dd1f
TM		 5795 msg.rpc_argp = &data->args;
5796 msg.rpc_resp = &data->res;
c970aa85 5797 task = rpc_run_task(&task_setup_data);
7a1218a2 5798 if (IS_ERR(task))
fe650407 5799 return PTR_ERR(task);
e6f81075
TM		 5800 if (!issync)
5801 goto out;
fe650407 5802 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5803 if (status != 0)
5804 goto out;
5805 status = data->rpc_status;
e6f81075 5806out:
e6b3c4db 5807 rpc_put_task(task);
fe650407 5808 return status;
1da177e4
LT		 5809}
5810
e6f81075 5811int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5812{
5813 struct nfs_server *server = NFS_SERVER(inode);
5814 struct nfs4_exception exception = { };
5815 int err;
5816 do {
e6f81075 5817 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
48c9579a 5818 trace_nfs4_delegreturn(inode, stateid, err);
1da177e4
LT		 5819 switch (err) {
5820 case -NFS4ERR_STALE_STATEID:
5821 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5822 case 0:
5823 return 0;
5824 }
5825 err = nfs4_handle_exception(server, err, &exception);
5826 } while (exception.retry);
5827 return err;
5828}
5829
1da177e4
LT		 5830static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5831{
5832 struct inode *inode = state->inode;
5833 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5834 struct nfs_client *clp = server->nfs_client;
911d1aaf 5835 struct nfs_lockt_args arg = {
1da177e4 5836 .fh = NFS_FH(inode),
911d1aaf 5837 .fl = request,
1da177e4 5838 };
911d1aaf
TM		 5839 struct nfs_lockt_res res = {
5840 .denied = request,
1da177e4
LT		 5841 };
5842 struct rpc_message msg = {
5843 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5844 .rpc_argp = &arg,
5845 .rpc_resp = &res,
5846 .rpc_cred = state->owner->so_cred,
5847 };
1da177e4
LT		 5848 struct nfs4_lock_state *lsp;
5849 int status;
5850
911d1aaf 5851 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5852 status = nfs4_set_lock_state(state, request);
5853 if (status != 0)
5854 goto out;
5855 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5856 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5857 arg.lock_owner.s_dev = server->s_dev;
7c513058 5858 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5859 switch (status) {
5860 case 0:
5861 request->fl_type = F_UNLCK;
5862 break;
5863 case -NFS4ERR_DENIED:
5864 status = 0;
1da177e4 5865 }
70cc6487 5866 request->fl_ops->fl_release_private(request);
a6f951dd 5867 request->fl_ops = NULL;
8d0a8a9d 5868out:
1da177e4
LT		 5869 return status;
5870}
5871
5872static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5873{
5874 struct nfs4_exception exception = { };
5875 int err;
5876
5877 do {
d1b748a5
TM		 5878 err = _nfs4_proc_getlk(state, cmd, request);
5879 trace_nfs4_get_lock(request, state, cmd, err);
5880 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5881 &exception);
5882 } while (exception.retry);
5883 return err;
5884}
5885
faf5f49c 5886struct nfs4_unlockdata {
911d1aaf
TM		 5887 struct nfs_locku_args arg;
5888 struct nfs_locku_res res;
faf5f49c
TM		 5889 struct nfs4_lock_state *lsp;
5890 struct nfs_open_context *ctx;
911d1aaf 5891 struct file_lock fl;
516285eb 5892 struct nfs_server *server;
26e976a8 5893 unsigned long timestamp;
faf5f49c
TM		 5894};
5895
911d1aaf
TM		 5896static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5897 struct nfs_open_context *ctx,
5898 struct nfs4_lock_state *lsp,
5899 struct nfs_seqid *seqid)
5900{
5901 struct nfs4_unlockdata *p;
5902 struct inode *inode = lsp->ls_state->inode;
5903
8535b2be 5904 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5905 if (p == NULL)
5906 return NULL;
5907 p->arg.fh = NFS_FH(inode);
5908 p->arg.fl = &p->fl;
5909 p->arg.seqid = seqid;
c1d51931 5910 p->res.seqid = seqid;
911d1aaf
TM		 5911 p->lsp = lsp;
5912 atomic_inc(&lsp->ls_count);
5913 /* Ensure we don't close file until we're done freeing locks! */
5914 p->ctx = get_nfs_open_context(ctx);
5915 memcpy(&p->fl, fl, sizeof(p->fl));
5916 p->server = NFS_SERVER(inode);
5917 return p;
5918}
5919
06f814a3 5920static void nfs4_locku_release_calldata(void *data)
faf5f49c 5921{
963d8fe5 5922 struct nfs4_unlockdata *calldata = data;
911d1aaf 5923 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5924 nfs4_put_lock_state(calldata->lsp);
5925 put_nfs_open_context(calldata->ctx);
5926 kfree(calldata);
faf5f49c
TM		 5927}
5928
963d8fe5 5929static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5930{
963d8fe5 5931 struct nfs4_unlockdata *calldata = data;
faf5f49c 5932
14516c3a
TM		 5933 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5934 return;
faf5f49c
TM		 5935 switch (task->tk_status) {
5936 case 0:
26e976a8 5937 renew_lease(calldata->server, calldata->timestamp);
75575ddf 5938 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 5939 if (nfs4_update_lock_stateid(calldata->lsp,
5940 &calldata->res.stateid))
5941 break;
26d36301
TM		 5942 case -NFS4ERR_ADMIN_REVOKED:
5943 case -NFS4ERR_EXPIRED:
5944 nfs4_free_revoked_stateid(calldata->server,
5945 &calldata->arg.stateid,
5946 task->tk_msg.rpc_cred);
9e33bed5
TM		 5947 case -NFS4ERR_BAD_STATEID:
5948 case -NFS4ERR_OLD_STATEID:
faf5f49c 5949 case -NFS4ERR_STALE_STATEID:
425c1d4e
TM		 5950 if (!nfs4_stateid_match(&calldata->arg.stateid,
5951 &calldata->lsp->ls_stateid))
5952 rpc_restart_call_prepare(task);
faf5f49c
TM		 5953 break;
5954 default:
8478eaa1
N		 5955 if (nfs4_async_handle_error(task, calldata->server,
5956 NULL, NULL) == -EAGAIN)
d00c5d43 5957 rpc_restart_call_prepare(task);
faf5f49c 5958 }
2b1bc308 5959 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5960}
5961
4ce70ada 5962static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5963{
4ce70ada 5964 struct nfs4_unlockdata *calldata = data;
faf5f49c 5965
911d1aaf 5966 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5967 goto out_wait;
425c1d4e 5968 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5969 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5970 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5971 goto out_no_action;
faf5f49c 5972 }
26e976a8 5973 calldata->timestamp = jiffies;
035168ab 5974 if (nfs4_setup_sequence(calldata->server,
a893693c 5975 &calldata->arg.seq_args,
2240a9e2
TM		 5976 &calldata->res.seq_res,
5977 task) != 0)
5978 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5979 return;
5980out_no_action:
5981 task->tk_action = NULL;
5982out_wait:
5983 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5984}
5985
963d8fe5 5986static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5987 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5988 .rpc_call_done = nfs4_locku_done,
06f814a3 5989 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5990};
5991
a5d16a4d
TM		 5992static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5993 struct nfs_open_context *ctx,
5994 struct nfs4_lock_state *lsp,
5995 struct nfs_seqid *seqid)
5996{
5997 struct nfs4_unlockdata *data;
5138fde0
TM		 5998 struct rpc_message msg = {
5999 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
6000 .rpc_cred = ctx->cred,
6001 };
c970aa85
TM		 6002 struct rpc_task_setup task_setup_data = {
6003 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 6004 .rpc_message = &msg,
c970aa85 6005 .callback_ops = &nfs4_locku_ops,
101070ca 6006 .workqueue = nfsiod_workqueue,
c970aa85
TM		 6007 .flags = RPC_TASK_ASYNC,
6008 };
a5d16a4d 6009
fa940720
WAA		 6010 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
6011 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
6012
137d6aca
FF		 6013 /* Ensure this is an unlock - when canceling a lock, the
6014 * canceled lock is passed in, and it won't be an unlock.
6015 */
6016 fl->fl_type = F_UNLCK;
6017
a5d16a4d
TM		 6018 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
6019 if (data == NULL) {
6020 nfs_free_seqid(seqid);
6021 return ERR_PTR(-ENOMEM);
6022 }
6023
a9c92d6b 6024 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 6025 msg.rpc_argp = &data->arg;
6026 msg.rpc_resp = &data->res;
c970aa85
TM		 6027 task_setup_data.callback_data = data;
6028 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 6029}
6030
faf5f49c
TM		 6031static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
6032{
65b62a29
TM		 6033 struct inode *inode = state->inode;
6034 struct nfs4_state_owner *sp = state->owner;
6035 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 6036 struct nfs_seqid *seqid;
1da177e4 6037 struct nfs4_lock_state *lsp;
06f814a3 6038 struct rpc_task *task;
b4019c0e 6039 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 6040 int status = 0;
536ff0f8 6041 unsigned char fl_flags = request->fl_flags;
faf5f49c 6042
8d0a8a9d 6043 status = nfs4_set_lock_state(state, request);
9b073574
TM		 6044 /* Unlock _before_ we do the RPC call */
6045 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 6046 /* Exclude nfs_delegation_claim_locks() */
6047 mutex_lock(&sp->so_delegreturn_mutex);
6048 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 6049 down_read(&nfsi->rwsem);
75575ddf 6050 if (locks_lock_inode_wait(inode, request) == -ENOENT) {
19e03c57 6051 up_read(&nfsi->rwsem);
65b62a29 6052 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 6053 goto out;
19e03c57
TM		 6054 }
6055 up_read(&nfsi->rwsem);
65b62a29 6056 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 6057 if (status != 0)
9b073574
TM		 6058 goto out;
6059 /* Is this a delegated lock? */
8d0a8a9d 6060 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 6061 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
6062 goto out;
b4019c0e
TM		 6063 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
6064 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 6065 status = -ENOMEM;
badc76dd 6066 if (IS_ERR(seqid))
9b073574 6067 goto out;
cd3758e3 6068 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 6069 status = PTR_ERR(task);
6070 if (IS_ERR(task))
9b073574 6071 goto out;
a5d16a4d 6072 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 6073 rpc_put_task(task);
9b073574 6074out:
536ff0f8 6075 request->fl_flags = fl_flags;
d1b748a5 6076 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 6077 return status;
6078}
6079
a5d16a4d
TM		 6080struct nfs4_lockdata {
6081 struct nfs_lock_args arg;
6082 struct nfs_lock_res res;
6083 struct nfs4_lock_state *lsp;
6084 struct nfs_open_context *ctx;
6085 struct file_lock fl;
26e976a8 6086 unsigned long timestamp;
a5d16a4d
TM		 6087 int rpc_status;
6088 int cancelled;
66179efe 6089 struct nfs_server *server;
a5d16a4d
TM		 6090};
6091
6092static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 6093 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
6094 gfp_t gfp_mask)
1da177e4 6095{
a5d16a4d
TM		 6096 struct nfs4_lockdata *p;
6097 struct inode *inode = lsp->ls_state->inode;
1da177e4 6098 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 6099 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 6100
8535b2be 6101 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 6102 if (p == NULL)
6103 return NULL;
6104
6105 p->arg.fh = NFS_FH(inode);
6106 p->arg.fl = &p->fl;
8535b2be 6107 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 6108 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 6109 goto out_free;
b4019c0e
TM		 6110 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
6111 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 6112 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 6113 goto out_free_seqid;
7539bbab 6114 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 6115 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 6116 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 6117 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 6118 p->lsp = lsp;
66179efe 6119 p->server = server;
a5d16a4d
TM		 6120 atomic_inc(&lsp->ls_count);
6121 p->ctx = get_nfs_open_context(ctx);
feaff8e5 6122 get_file(fl->fl_file);
a5d16a4d
TM		 6123 memcpy(&p->fl, fl, sizeof(p->fl));
6124 return p;
2f74c0a0
TM		 6125out_free_seqid:
6126 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 6127out_free:
6128 kfree(p);
6129 return NULL;
6130}
6131
6132static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
6133{
6134 struct nfs4_lockdata *data = calldata;
6135 struct nfs4_state *state = data->lsp->ls_state;
06735b34 6136
3110ff80 6137 dprintk("%s: begin!\n", __func__);
2f74c0a0 6138 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 6139 goto out_wait;
a5d16a4d 6140 /* Do we need to do an open_to_lock_owner? */
6b447539 6141 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 6142 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 6143 goto out_release_lock_seqid;
8fe72bac 6144 }
425c1d4e
TM		 6145 nfs4_stateid_copy(&data->arg.open_stateid,
6146 &state->open_stateid);
a5d16a4d 6147 data->arg.new_lock_owner = 1;
c1d51931 6148 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 6149 } else {
2f74c0a0 6150 data->arg.new_lock_owner = 0;
425c1d4e
TM		 6151 nfs4_stateid_copy(&data->arg.lock_stateid,
6152 &data->lsp->ls_stateid);
6153 }
5d422301
TM		 6154 if (!nfs4_valid_open_stateid(state)) {
6155 data->rpc_status = -EBADF;
6156 task->tk_action = NULL;
6157 goto out_release_open_seqid;
6158 }
26e976a8 6159 data->timestamp = jiffies;
035168ab
TM		 6160 if (nfs4_setup_sequence(data->server,
6161 &data->arg.seq_args,
2240a9e2 6162 &data->res.seq_res,
d9afbd1b 6163 task) == 0)
66179efe 6164 return;
5d422301 6165out_release_open_seqid:
2240a9e2
TM		 6166 nfs_release_seqid(data->arg.open_seqid);
6167out_release_lock_seqid:
6168 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 6169out_wait:
6170 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 6171 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 6172}
6173
a5d16a4d
TM		 6174static void nfs4_lock_done(struct rpc_task *task, void *calldata)
6175{
6176 struct nfs4_lockdata *data = calldata;
39071e6f 6177 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 6178
3110ff80 6179 dprintk("%s: begin!\n", __func__);
a5d16a4d 6180
14516c3a
TM		 6181 if (!nfs4_sequence_done(task, &data->res.seq_res))
6182 return;
66179efe 6183
a5d16a4d 6184 data->rpc_status = task->tk_status;
425c1d4e
TM		 6185 switch (task->tk_status) {
6186 case 0:
2b0143b5 6187 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 6188 data->timestamp);
c69899a1
TM		 6189 if (data->arg.new_lock) {
6190 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
75575ddf 6191 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) {
c69899a1
TM		 6192 rpc_restart_call_prepare(task);
6193 break;
6194 }
6195 }
39071e6f
TM		 6196 if (data->arg.new_lock_owner != 0) {
6197 nfs_confirm_seqid(&lsp->ls_seqid, 0);
6198 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
6199 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6200 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
6201 rpc_restart_call_prepare(task);
425c1d4e
TM		 6202 break;
6203 case -NFS4ERR_BAD_STATEID:
6204 case -NFS4ERR_OLD_STATEID:
6205 case -NFS4ERR_STALE_STATEID:
6206 case -NFS4ERR_EXPIRED:
6207 if (data->arg.new_lock_owner != 0) {
6208 if (!nfs4_stateid_match(&data->arg.open_stateid,
6209 &lsp->ls_state->open_stateid))
6210 rpc_restart_call_prepare(task);
6211 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
6212 &lsp->ls_stateid))
6213 rpc_restart_call_prepare(task);
a5d16a4d 6214 }
3110ff80 6215 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 6216}
6217
6218static void nfs4_lock_release(void *calldata)
6219{
6220 struct nfs4_lockdata *data = calldata;
6221
3110ff80 6222 dprintk("%s: begin!\n", __func__);
2f74c0a0 6223 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 6224 if (data->cancelled != 0) {
6225 struct rpc_task *task;
6226 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
6227 data->arg.lock_seqid);
6228 if (!IS_ERR(task))
bf294b41 6229 rpc_put_task_async(task);
3110ff80 6230 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 6231 } else
6232 nfs_free_seqid(data->arg.lock_seqid);
6233 nfs4_put_lock_state(data->lsp);
6234 put_nfs_open_context(data->ctx);
feaff8e5 6235 fput(data->fl.fl_file);
a5d16a4d 6236 kfree(data);
3110ff80 6237 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 6238}
6239
6240static const struct rpc_call_ops nfs4_lock_ops = {
6241 .rpc_call_prepare = nfs4_lock_prepare,
6242 .rpc_call_done = nfs4_lock_done,
6243 .rpc_release = nfs4_lock_release,
6244};
6245
2bee72a6
TM		 6246static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
6247{
2bee72a6
TM		 6248 switch (error) {
6249 case -NFS4ERR_ADMIN_REVOKED:
d7f3e4bf 6250 case -NFS4ERR_EXPIRED:
2bee72a6 6251 case -NFS4ERR_BAD_STATEID:
ecac799a 6252 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 6253 if (new_lock_owner != 0 ||
795a88c9 6254 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 6255 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 6256 break;
6257 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 6258 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a 6259 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 6260 };
6261}
6262
afe6c27c 6263static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 6264{
6265 struct nfs4_lockdata *data;
6266 struct rpc_task *task;
5138fde0
TM		 6267 struct rpc_message msg = {
6268 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
6269 .rpc_cred = state->owner->so_cred,
6270 };
c970aa85
TM		 6271 struct rpc_task_setup task_setup_data = {
6272 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 6273 .rpc_message = &msg,
c970aa85 6274 .callback_ops = &nfs4_lock_ops,
101070ca 6275 .workqueue = nfsiod_workqueue,
c970aa85
TM		 6276 .flags = RPC_TASK_ASYNC,
6277 };
a5d16a4d
TM		 6278 int ret;
6279
3110ff80 6280 dprintk("%s: begin!\n", __func__);
cd3758e3 6281 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 6282 fl->fl_u.nfs4_fl.owner,
6283 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 6284 if (data == NULL)
6285 return -ENOMEM;
6286 if (IS_SETLKW(cmd))
6287 data->arg.block = 1;
a9c92d6b 6288 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 6289 msg.rpc_argp = &data->arg;
6290 msg.rpc_resp = &data->res;
c970aa85 6291 task_setup_data.callback_data = data;
8fe72bac
TM		 6292 if (recovery_type > NFS_LOCK_NEW) {
6293 if (recovery_type == NFS_LOCK_RECLAIM)
6294 data->arg.reclaim = NFS_LOCK_RECLAIM;
6295 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 6296 } else
6297 data->arg.new_lock = 1;
c970aa85 6298 task = rpc_run_task(&task_setup_data);
7a1218a2 6299 if (IS_ERR(task))
a5d16a4d 6300 return PTR_ERR(task);
a5d16a4d
TM		 6301 ret = nfs4_wait_for_completion_rpc_task(task);
6302 if (ret == 0) {
6303 ret = data->rpc_status;
2bee72a6
TM		 6304 if (ret)
6305 nfs4_handle_setlk_error(data->server, data->lsp,
6306 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 6307 } else
6308 data->cancelled = 1;
e6b3c4db 6309 rpc_put_task(task);
3110ff80 6310 dprintk("%s: done, ret = %d!\n", __func__, ret);
48c9579a 6311 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
a5d16a4d 6312 return ret;
1da177e4
LT		 6313}
6314
6315static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
6316{
202b50dc 6317 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6318 struct nfs4_exception exception = {
6319 .inode = state->inode,
6320 };
202b50dc
TM		 6321 int err;
6322
6323 do {
42a2d13e
TM		 6324 /* Cache the lock if possible... */
6325 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6326 return 0;
afe6c27c 6327 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 6328 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 6329 break;
6330 nfs4_handle_exception(server, err, &exception);
6331 } while (exception.retry);
6332 return err;
1da177e4
LT		 6333}
6334
6335static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
6336{
202b50dc 6337 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6338 struct nfs4_exception exception = {
6339 .inode = state->inode,
6340 };
202b50dc
TM		 6341 int err;
6342
6bfc93ef
TM		 6343 err = nfs4_set_lock_state(state, request);
6344 if (err != 0)
6345 return err;
f6de7a39 6346 if (!recover_lost_locks) {
ef1820f9
N		 6347 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
6348 return 0;
6349 }
202b50dc 6350 do {
42a2d13e
TM		 6351 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6352 return 0;
afe6c27c 6353 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 6354 switch (err) {
6355 default:
6356 goto out;
6357 case -NFS4ERR_GRACE:
6358 case -NFS4ERR_DELAY:
6359 nfs4_handle_exception(server, err, &exception);
6360 err = 0;
6361 }
202b50dc 6362 } while (exception.retry);
a9ed2e25 6363out:
202b50dc 6364 return err;
1da177e4
LT		 6365}
6366
f062eb6c 6367#if defined(CONFIG_NFS_V4_1)
b01dd1d8
BS		 6368static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6369{
c5896fc8
TM		 6370 struct nfs4_lock_state *lsp;
6371 int status;
b01dd1d8 6372
c5896fc8
TM		 6373 status = nfs4_set_lock_state(state, request);
6374 if (status != 0)
6375 return status;
6376 lsp = request->fl_u.nfs4_fl.owner;
6377 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) ||
6378 test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
6379 return 0;
6380 status = nfs4_lock_expired(state, request);
eb64cf96 6381 return status;
f062eb6c
BS		 6382}
6383#endif
6384
1da177e4
LT		 6385static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6386{
19e03c57 6387 struct nfs_inode *nfsi = NFS_I(state->inode);
11476e9d 6388 struct nfs4_state_owner *sp = state->owner;
01c3b861 6389 unsigned char fl_flags = request->fl_flags;
1ea67dbd 6390 int status;
1da177e4 6391
01c3b861 6392 request->fl_flags |= FL_ACCESS;
75575ddf 6393 status = locks_lock_inode_wait(state->inode, request);
01c3b861
TM		 6394 if (status < 0)
6395 goto out;
11476e9d 6396 mutex_lock(&sp->so_delegreturn_mutex);
19e03c57 6397 down_read(&nfsi->rwsem);
01c3b861 6398 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6399 /* Yes: cache locks! */
01c3b861 6400 /* ...but avoid races with delegation recall... */
19e03c57 6401 request->fl_flags = fl_flags & ~FL_SLEEP;
75575ddf 6402 status = locks_lock_inode_wait(state->inode, request);
c69899a1 6403 up_read(&nfsi->rwsem);
11476e9d 6404 mutex_unlock(&sp->so_delegreturn_mutex);
9a99af49 6405 goto out;
9a99af49 6406 }
19e03c57 6407 up_read(&nfsi->rwsem);
11476e9d 6408 mutex_unlock(&sp->so_delegreturn_mutex);
c69899a1 6409 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6410out:
6411 request->fl_flags = fl_flags;
1da177e4
LT		 6412 return status;
6413}
6414
6415static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6416{
a1d0b5ee
TM		 6417 struct nfs4_exception exception = {
6418 .state = state,
05ffe24f 6419 .inode = state->inode,
a1d0b5ee 6420 };
1da177e4
LT		 6421 int err;
6422
6423 do {
965b5d67
TM		 6424 err = _nfs4_proc_setlk(state, cmd, request);
6425 if (err == -NFS4ERR_DENIED)
6426 err = -EAGAIN;
1da177e4 6427 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6428 err, &exception);
1da177e4
LT		 6429 } while (exception.retry);
6430 return err;
6431}
6432
d2f3a7f9
JL		 6433#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
6434#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
6435
6436static int
a1d617d8
JL		 6437nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd,
6438 struct file_lock *request)
d2f3a7f9
JL		 6439{
6440 int status = -ERESTARTSYS;
6441 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6442
6443 while(!signalled()) {
6444 status = nfs4_proc_setlk(state, cmd, request);
6445 if ((status != -EAGAIN) || IS_SETLK(cmd))
6446 break;
6447 freezable_schedule_timeout_interruptible(timeout);
6448 timeout *= 2;
6449 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout);
6450 status = -ERESTARTSYS;
6451 }
6452 return status;
6453}
6454
a1d617d8
JL		 6455#ifdef CONFIG_NFS_V4_1
6456struct nfs4_lock_waiter {
6457 struct task_struct *task;
6458 struct inode *inode;
6459 struct nfs_lowner *owner;
6460 bool notified;
6461};
6462
6463static int
6464nfs4_wake_lock_waiter(wait_queue_t *wait, unsigned int mode, int flags, void *key)
6465{
6466 int ret;
6467 struct cb_notify_lock_args *cbnl = key;
6468 struct nfs4_lock_waiter *waiter = wait->private;
6469 struct nfs_lowner *lowner = &cbnl->cbnl_owner,
6470 *wowner = waiter->owner;
6471
6472 /* Only wake if the callback was for the same owner */
6473 if (lowner->clientid != wowner->clientid ||
6474 lowner->id != wowner->id ||
6475 lowner->s_dev != wowner->s_dev)
6476 return 0;
6477
6478 /* Make sure it's for the right inode */
6479 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
6480 return 0;
6481
6482 waiter->notified = true;
6483
6484 /* override "private" so we can use default_wake_function */
6485 wait->private = waiter->task;
6486 ret = autoremove_wake_function(wait, mode, flags, key);
6487 wait->private = waiter;
6488 return ret;
6489}
6490
6491static int
6492nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6493{
6494 int status = -ERESTARTSYS;
6495 unsigned long flags;
6496 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
6497 struct nfs_server *server = NFS_SERVER(state->inode);
6498 struct nfs_client *clp = server->nfs_client;
6499 wait_queue_head_t *q = &clp->cl_lock_waitq;
6500 struct nfs_lowner owner = { .clientid = clp->cl_clientid,
6501 .id = lsp->ls_seqid.owner_id,
6502 .s_dev = server->s_dev };
6503 struct nfs4_lock_waiter waiter = { .task = current,
6504 .inode = state->inode,
6505 .owner = &owner,
6506 .notified = false };
6507 wait_queue_t wait;
6508
6509 /* Don't bother with waitqueue if we don't expect a callback */
6510 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags))
6511 return nfs4_retry_setlk_simple(state, cmd, request);
6512
6513 init_wait(&wait);
6514 wait.private = &waiter;
6515 wait.func = nfs4_wake_lock_waiter;
6516 add_wait_queue(q, &wait);
6517
6518 while(!signalled()) {
6519 status = nfs4_proc_setlk(state, cmd, request);
6520 if ((status != -EAGAIN) || IS_SETLK(cmd))
6521 break;
6522
6523 status = -ERESTARTSYS;
6524 spin_lock_irqsave(&q->lock, flags);
6525 if (waiter.notified) {
6526 spin_unlock_irqrestore(&q->lock, flags);
6527 continue;
6528 }
6529 set_current_state(TASK_INTERRUPTIBLE);
6530 spin_unlock_irqrestore(&q->lock, flags);
6531
6532 freezable_schedule_timeout_interruptible(NFS4_LOCK_MAXTIMEOUT);
6533 }
6534
6535 finish_wait(q, &wait);
6536 return status;
6537}
6538#else /* !CONFIG_NFS_V4_1 */
6539static inline int
6540nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6541{
6542 return nfs4_retry_setlk_simple(state, cmd, request);
6543}
6544#endif
6545
1da177e4
LT		 6546static int
6547nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6548{
6549 struct nfs_open_context *ctx;
6550 struct nfs4_state *state;
1da177e4
LT		 6551 int status;
6552
6553 /* verify open state */
cd3758e3 6554 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6555 state = ctx->state;
6556
6557 if (request->fl_start < 0 || request->fl_end < 0)
6558 return -EINVAL;
6559
d953126a
TM		 6560 if (IS_GETLK(cmd)) {
6561 if (state != NULL)
6562 return nfs4_proc_getlk(state, F_GETLK, request);
6563 return 0;
6564 }
1da177e4
LT		 6565
6566 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6567 return -EINVAL;
6568
d953126a
TM		 6569 if (request->fl_type == F_UNLCK) {
6570 if (state != NULL)
6571 return nfs4_proc_unlck(state, cmd, request);
6572 return 0;
6573 }
1da177e4 6574
d953126a
TM		 6575 if (state == NULL)
6576 return -ENOLCK;
1ea67dbd
JL		 6577
6578 if ((request->fl_flags & FL_POSIX) &&
6579 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6580 return -ENOLCK;
6581
55725513
TM		 6582 /*
6583 * Don't rely on the VFS having checked the file open mode,
6584 * since it won't do this for flock() locks.
6585 */
f44106e2 6586 switch (request->fl_type) {
55725513
TM		 6587 case F_RDLCK:
6588 if (!(filp->f_mode & FMODE_READ))
6589 return -EBADF;
6590 break;
6591 case F_WRLCK:
6592 if (!(filp->f_mode & FMODE_WRITE))
6593 return -EBADF;
6594 }
6595
1ea67dbd
JL		 6596 status = nfs4_set_lock_state(state, request);
6597 if (status != 0)
6598 return status;
6599
d2f3a7f9 6600 return nfs4_retry_setlk(state, cmd, request);
1da177e4
LT		 6601}
6602
db4f2e63 6603int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6604{
6605 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6606 int err;
6607
6608 err = nfs4_set_lock_state(state, fl);
6609 if (err != 0)
db4f2e63 6610 return err;
4a706fa0 6611 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6612 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6613}
6b3b5496 6614
cf470c3e
TM		 6615struct nfs_release_lockowner_data {
6616 struct nfs4_lock_state *lsp;
5ae67c4f 6617 struct nfs_server *server;
cf470c3e 6618 struct nfs_release_lockowner_args args;
b7e63a10 6619 struct nfs_release_lockowner_res res;
60ea6812 6620 unsigned long timestamp;
cf470c3e
TM		 6621};
6622
fbd4bfd1
CL		 6623static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6624{
6625 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6626 struct nfs_server *server = data->server;
cb04ad2a
PT		 6627 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6628 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6629 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6630 data->timestamp = jiffies;
fbd4bfd1
CL		 6631}
6632
6633static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6634{
6635 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6636 struct nfs_server *server = data->server;
6637
b7e63a10 6638 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6639
6640 switch (task->tk_status) {
6641 case 0:
6642 renew_lease(server, data->timestamp);
6643 break;
6644 case -NFS4ERR_STALE_CLIENTID:
6645 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6646 nfs4_schedule_lease_recovery(server->nfs_client);
6647 break;
60ea6812
CL		 6648 case -NFS4ERR_LEASE_MOVED:
6649 case -NFS4ERR_DELAY:
8478eaa1
N		 6650 if (nfs4_async_handle_error(task, server,
6651 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6652 rpc_restart_call_prepare(task);
6653 }
fbd4bfd1
CL		 6654}
6655
d3c7b7cc
TM		 6656static void nfs4_release_lockowner_release(void *calldata)
6657{
cf470c3e 6658 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6659 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6660 kfree(calldata);
6661}
6662
17280175 6663static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6664 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6665 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6666 .rpc_release = nfs4_release_lockowner_release,
6667};
6668
f1cdae87
JL		 6669static void
6670nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6671{
cf470c3e 6672 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6673 struct rpc_message msg = {
6674 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6675 };
6676
6677 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6678 return;
fbd4bfd1 6679
cf470c3e
TM		 6680 data = kmalloc(sizeof(*data), GFP_NOFS);
6681 if (!data)
f1cdae87 6682 return;
cf470c3e 6683 data->lsp = lsp;
5ae67c4f 6684 data->server = server;
cf470c3e
TM		 6685 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6686 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6687 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6688
cf470c3e 6689 msg.rpc_argp = &data->args;
b7e63a10
TM		 6690 msg.rpc_resp = &data->res;
6691 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6692 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6693}
6694
aa1870af
BF		 6695#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6696
d9a82a04 6697static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
59301226
AV		 6698 struct dentry *unused, struct inode *inode,
6699 const char *key, const void *buf,
6700 size_t buflen, int flags)
6b3b5496 6701{
59301226 6702 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 6703}
6704
d9a82a04 6705static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
b296821a
AV		 6706 struct dentry *unused, struct inode *inode,
6707 const char *key, void *buf, size_t buflen)
6b3b5496 6708{
b296821a 6709 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 6710}
6711
764a5c6b 6712static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6b3b5496 6713{
764a5c6b 6714 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6b3b5496
BF		 6715}
6716
c9bccef6 6717#ifdef CONFIG_NFS_V4_SECURITY_LABEL
c9bccef6 6718
d9a82a04 6719static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
59301226
AV		 6720 struct dentry *unused, struct inode *inode,
6721 const char *key, const void *buf,
6722 size_t buflen, int flags)
c9bccef6
DQ		 6723{
6724 if (security_ismaclabel(key))
59301226 6725 return nfs4_set_security_label(inode, buf, buflen);
c9bccef6
DQ		 6726
6727 return -EOPNOTSUPP;
6728}
6729
d9a82a04 6730static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
b296821a
AV		 6731 struct dentry *unused, struct inode *inode,
6732 const char *key, void *buf, size_t buflen)
c9bccef6
DQ		 6733{
6734 if (security_ismaclabel(key))
b296821a 6735 return nfs4_get_security_label(inode, buf, buflen);
c9bccef6
DQ		 6736 return -EOPNOTSUPP;
6737}
6738
c4803c49
AG		 6739static ssize_t
6740nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
c9bccef6 6741{
c4803c49 6742 int len = 0;
c9bccef6 6743
c4803c49
AG		 6744 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
6745 len = security_inode_listsecurity(inode, list, list_len);
6746 if (list_len && len > list_len)
6747 return -ERANGE;
c9bccef6
DQ		 6748 }
6749 return len;
6750}
6751
6752static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6753 .prefix = XATTR_SECURITY_PREFIX,
c9bccef6
DQ		 6754 .get = nfs4_xattr_get_nfs4_label,
6755 .set = nfs4_xattr_set_nfs4_label,
6756};
c9bccef6 6757
c4803c49
AG		 6758#else
6759
6760static ssize_t
6761nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6762{
6763 return 0;
6764}
6765
6766#endif
c9bccef6 6767
533eb461
AA		 6768/*
6769 * nfs_fhget will use either the mounted_on_fileid or the fileid
6770 */
69aaaae1
TM		 6771static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6772{
533eb461
AA		 6773 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6774 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6775 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6776 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6777 return;
6778
6779 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6780 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6781 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6782 fattr->nlink = 2;
6783}
6784
f05d147f
BS		 6785static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6786 const struct qstr *name,
6787 struct nfs4_fs_locations *fs_locations,
6788 struct page *page)
683b57b4
TM		 6789{
6790 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6791 u32 bitmask[3] = {
361e624f 6792 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6793 };
6794 struct nfs4_fs_locations_arg args = {
6795 .dir_fh = NFS_FH(dir),
c228fd3a 6796 .name = name,
683b57b4
TM		 6797 .page = page,
6798 .bitmask = bitmask,
6799 };
22958463
BH		 6800 struct nfs4_fs_locations_res res = {
6801 .fs_locations = fs_locations,
6802 };
683b57b4
TM		 6803 struct rpc_message msg = {
6804 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6805 .rpc_argp = &args,
22958463 6806 .rpc_resp = &res,
683b57b4
TM		 6807 };
6808 int status;
6809
3110ff80 6810 dprintk("%s: start\n", __func__);
533eb461
AA		 6811
6812 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6813 * is not supported */
6814 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6815 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6816 else
6817 bitmask[0] |= FATTR4_WORD0_FILEID;
6818
c228fd3a 6819 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6820 fs_locations->server = server;
830b8e33 6821 fs_locations->nlocations = 0;
f05d147f 6822 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6823 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6824 return status;
6825}
6826
f05d147f
BS		 6827int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6828 const struct qstr *name,
6829 struct nfs4_fs_locations *fs_locations,
6830 struct page *page)
db0a9593
BS		 6831{
6832 struct nfs4_exception exception = { };
6833 int err;
6834 do {
078ea3df
TM		 6835 err = _nfs4_proc_fs_locations(client, dir, name,
6836 fs_locations, page);
6837 trace_nfs4_get_fs_locations(dir, name, err);
6838 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6839 &exception);
6840 } while (exception.retry);
6841 return err;
6842}
6843
b03d735b
CL		 6844/*
6845 * This operation also signals the server that this client is
6846 * performing migration recovery. The server can stop returning
6847 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6848 * appended to this compound to identify the client ID which is
6849 * performing recovery.
6850 */
6851static int _nfs40_proc_get_locations(struct inode *inode,
6852 struct nfs4_fs_locations *locations,
6853 struct page *page, struct rpc_cred *cred)
6854{
6855 struct nfs_server *server = NFS_SERVER(inode);
6856 struct rpc_clnt *clnt = server->client;
6857 u32 bitmask[2] = {
6858 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6859 };
6860 struct nfs4_fs_locations_arg args = {
6861 .clientid = server->nfs_client->cl_clientid,
6862 .fh = NFS_FH(inode),
6863 .page = page,
6864 .bitmask = bitmask,
6865 .migration = 1, /* skip LOOKUP */
6866 .renew = 1, /* append RENEW */
6867 };
6868 struct nfs4_fs_locations_res res = {
6869 .fs_locations = locations,
6870 .migration = 1,
6871 .renew = 1,
6872 };
6873 struct rpc_message msg = {
6874 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6875 .rpc_argp = &args,
6876 .rpc_resp = &res,
6877 .rpc_cred = cred,
6878 };
6879 unsigned long now = jiffies;
6880 int status;
6881
6882 nfs_fattr_init(&locations->fattr);
6883 locations->server = server;
6884 locations->nlocations = 0;
6885
6886 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6887 nfs4_set_sequence_privileged(&args.seq_args);
6888 status = nfs4_call_sync_sequence(clnt, server, &msg,
6889 &args.seq_args, &res.seq_res);
6890 if (status)
6891 return status;
6892
6893 renew_lease(server, now);
6894 return 0;
6895}
6896
6897#ifdef CONFIG_NFS_V4_1
6898
6899/*
6900 * This operation also signals the server that this client is
6901 * performing migration recovery. The server can stop asserting
6902 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6903 * performing this operation is identified in the SEQUENCE
6904 * operation in this compound.
6905 *
6906 * When the client supports GETATTR(fs_locations_info), it can
6907 * be plumbed in here.
6908 */
6909static int _nfs41_proc_get_locations(struct inode *inode,
6910 struct nfs4_fs_locations *locations,
6911 struct page *page, struct rpc_cred *cred)
6912{
6913 struct nfs_server *server = NFS_SERVER(inode);
6914 struct rpc_clnt *clnt = server->client;
6915 u32 bitmask[2] = {
6916 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6917 };
6918 struct nfs4_fs_locations_arg args = {
6919 .fh = NFS_FH(inode),
6920 .page = page,
6921 .bitmask = bitmask,
6922 .migration = 1, /* skip LOOKUP */
6923 };
6924 struct nfs4_fs_locations_res res = {
6925 .fs_locations = locations,
6926 .migration = 1,
6927 };
6928 struct rpc_message msg = {
6929 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6930 .rpc_argp = &args,
6931 .rpc_resp = &res,
6932 .rpc_cred = cred,
6933 };
6934 int status;
6935
6936 nfs_fattr_init(&locations->fattr);
6937 locations->server = server;
6938 locations->nlocations = 0;
6939
6940 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6941 nfs4_set_sequence_privileged(&args.seq_args);
6942 status = nfs4_call_sync_sequence(clnt, server, &msg,
6943 &args.seq_args, &res.seq_res);
6944 if (status == NFS4_OK &&
6945 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6946 status = -NFS4ERR_LEASE_MOVED;
6947 return status;
6948}
6949
6950#endif /* CONFIG_NFS_V4_1 */
6951
6952/**
6953 * nfs4_proc_get_locations - discover locations for a migrated FSID
6954 * @inode: inode on FSID that is migrating
6955 * @locations: result of query
6956 * @page: buffer
6957 * @cred: credential to use for this operation
6958 *
6959 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6960 * operation failed, or a negative errno if a local error occurred.
6961 *
6962 * On success, "locations" is filled in, but if the server has
6963 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6964 * asserted.
6965 *
6966 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6967 * from this client that require migration recovery.
6968 */
6969int nfs4_proc_get_locations(struct inode *inode,
6970 struct nfs4_fs_locations *locations,
6971 struct page *page, struct rpc_cred *cred)
6972{
6973 struct nfs_server *server = NFS_SERVER(inode);
6974 struct nfs_client *clp = server->nfs_client;
6975 const struct nfs4_mig_recovery_ops *ops =
6976 clp->cl_mvops->mig_recovery_ops;
6977 struct nfs4_exception exception = { };
6978 int status;
6979
6980 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6981 (unsigned long long)server->fsid.major,
6982 (unsigned long long)server->fsid.minor,
6983 clp->cl_hostname);
6984 nfs_display_fhandle(NFS_FH(inode), __func__);
6985
6986 do {
6987 status = ops->get_locations(inode, locations, page, cred);
6988 if (status != -NFS4ERR_DELAY)
6989 break;
6990 nfs4_handle_exception(server, status, &exception);
6991 } while (exception.retry);
6992 return status;
6993}
6994
44c99933
CL		 6995/*
6996 * This operation also signals the server that this client is
6997 * performing "lease moved" recovery. The server can stop
6998 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6999 * is appended to this compound to identify the client ID which is
7000 * performing recovery.
7001 */
7002static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7003{
7004 struct nfs_server *server = NFS_SERVER(inode);
7005 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
7006 struct rpc_clnt *clnt = server->client;
7007 struct nfs4_fsid_present_arg args = {
7008 .fh = NFS_FH(inode),
7009 .clientid = clp->cl_clientid,
7010 .renew = 1, /* append RENEW */
7011 };
7012 struct nfs4_fsid_present_res res = {
7013 .renew = 1,
7014 };
7015 struct rpc_message msg = {
7016 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
7017 .rpc_argp = &args,
7018 .rpc_resp = &res,
7019 .rpc_cred = cred,
7020 };
7021 unsigned long now = jiffies;
7022 int status;
7023
7024 res.fh = nfs_alloc_fhandle();
7025 if (res.fh == NULL)
7026 return -ENOMEM;
7027
7028 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
7029 nfs4_set_sequence_privileged(&args.seq_args);
7030 status = nfs4_call_sync_sequence(clnt, server, &msg,
7031 &args.seq_args, &res.seq_res);
7032 nfs_free_fhandle(res.fh);
7033 if (status)
7034 return status;
7035
7036 do_renew_lease(clp, now);
7037 return 0;
7038}
7039
7040#ifdef CONFIG_NFS_V4_1
7041
7042/*
7043 * This operation also signals the server that this client is
7044 * performing "lease moved" recovery. The server can stop asserting
7045 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
7046 * this operation is identified in the SEQUENCE operation in this
7047 * compound.
7048 */
7049static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7050{
7051 struct nfs_server *server = NFS_SERVER(inode);
7052 struct rpc_clnt *clnt = server->client;
7053 struct nfs4_fsid_present_arg args = {
7054 .fh = NFS_FH(inode),
7055 };
7056 struct nfs4_fsid_present_res res = {
7057 };
7058 struct rpc_message msg = {
7059 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
7060 .rpc_argp = &args,
7061 .rpc_resp = &res,
7062 .rpc_cred = cred,
7063 };
7064 int status;
7065
7066 res.fh = nfs_alloc_fhandle();
7067 if (res.fh == NULL)
7068 return -ENOMEM;
7069
7070 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
7071 nfs4_set_sequence_privileged(&args.seq_args);
7072 status = nfs4_call_sync_sequence(clnt, server, &msg,
7073 &args.seq_args, &res.seq_res);
7074 nfs_free_fhandle(res.fh);
7075 if (status == NFS4_OK &&
7076 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
7077 status = -NFS4ERR_LEASE_MOVED;
7078 return status;
7079}
7080
7081#endif /* CONFIG_NFS_V4_1 */
7082
7083/**
7084 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
7085 * @inode: inode on FSID to check
7086 * @cred: credential to use for this operation
7087 *
7088 * Server indicates whether the FSID is present, moved, or not
7089 * recognized. This operation is necessary to clear a LEASE_MOVED
7090 * condition for this client ID.
7091 *
7092 * Returns NFS4_OK if the FSID is present on this server,
7093 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
7094 * NFS4ERR code if some error occurred on the server, or a
7095 * negative errno if a local failure occurred.
7096 */
7097int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7098{
7099 struct nfs_server *server = NFS_SERVER(inode);
7100 struct nfs_client *clp = server->nfs_client;
7101 const struct nfs4_mig_recovery_ops *ops =
7102 clp->cl_mvops->mig_recovery_ops;
7103 struct nfs4_exception exception = { };
7104 int status;
7105
7106 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
7107 (unsigned long long)server->fsid.major,
7108 (unsigned long long)server->fsid.minor,
7109 clp->cl_hostname);
7110 nfs_display_fhandle(NFS_FH(inode), __func__);
7111
7112 do {
7113 status = ops->fsid_present(inode, cred);
7114 if (status != -NFS4ERR_DELAY)
7115 break;
7116 nfs4_handle_exception(server, status, &exception);
7117 } while (exception.retry);
7118 return status;
7119}
7120
5ec16a85 7121/**
a5250def
WAA		 7122 * If 'use_integrity' is true and the state managment nfs_client
7123 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
7124 * and the machine credential as per RFC3530bis and RFC5661 Security
7125 * Considerations sections. Otherwise, just use the user cred with the
7126 * filesystem's rpc_client.
5ec16a85 7127 */
a5250def 7128static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 7129{
7130 int status;
7131 struct nfs4_secinfo_arg args = {
7132 .dir_fh = NFS_FH(dir),
7133 .name = name,
7134 };
7135 struct nfs4_secinfo_res res = {
7136 .flavors = flavors,
7137 };
7138 struct rpc_message msg = {
7139 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
7140 .rpc_argp = &args,
7141 .rpc_resp = &res,
7142 };
a5250def 7143 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 7144 struct rpc_cred *cred = NULL;
a5250def
WAA		 7145
7146 if (use_integrity) {
7147 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 7148 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
7149 msg.rpc_cred = cred;
a5250def 7150 }
5a5ea0d4
BS		 7151
7152 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 7153
7154 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
7155 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
7156
a5250def
WAA		 7157 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
7158 &res.seq_res, 0);
5a5ea0d4 7159 dprintk("NFS reply secinfo: %d\n", status);
a5250def 7160
7cb852df
WAA		 7161 if (cred)
7162 put_rpccred(cred);
a5250def 7163
5a5ea0d4
BS		 7164 return status;
7165}
7166
72de53ec
BS		 7167int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
7168 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 7169{
7170 struct nfs4_exception exception = { };
7171 int err;
7172 do {
a5250def
WAA		 7173 err = -NFS4ERR_WRONGSEC;
7174
7175 /* try to use integrity protection with machine cred */
7176 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
7177 err = _nfs4_proc_secinfo(dir, name, flavors, true);
7178
7179 /*
7180 * if unable to use integrity protection, or SECINFO with
7181 * integrity protection returns NFS4ERR_WRONGSEC (which is
7182 * disallowed by spec, but exists in deployed servers) use
7183 * the current filesystem's rpc_client and the user cred.
7184 */
7185 if (err == -NFS4ERR_WRONGSEC)
7186 err = _nfs4_proc_secinfo(dir, name, flavors, false);
7187
078ea3df
TM		 7188 trace_nfs4_secinfo(dir, name, err);
7189 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 7190 &exception);
7191 } while (exception.retry);
7192 return err;
7193}
7194
557134a3 7195#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 7196/*
7197 * Check the exchange flags returned by the server for invalid flags, having
7198 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
7199 * DS flags set.
7200 */
7201static int nfs4_check_cl_exchange_flags(u32 flags)
7202{
7203 if (flags & ~EXCHGID4_FLAG_MASK_R)
7204 goto out_inval;
7205 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
7206 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
7207 goto out_inval;
7208 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
7209 goto out_inval;
7210 return NFS_OK;
7211out_inval:
7212 return -NFS4ERR_INVAL;
7213}
7214
78fe0f41 7215static bool
79d4e1f0
CL		 7216nfs41_same_server_scope(struct nfs41_server_scope *a,
7217 struct nfs41_server_scope *b)
78fe0f41
WAA		 7218{
7219 if (a->server_scope_sz == b->server_scope_sz &&
7220 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
7221 return true;
7222
7223 return false;
7224}
7225
02a95dee
AA		 7226static void
7227nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
7228{
7229}
7230
7231static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
7232 .rpc_call_done = &nfs4_bind_one_conn_to_session_done,
7233};
7234
7c44f1ae 7235/*
d9ddbf5d 7236 * nfs4_proc_bind_one_conn_to_session()
7c44f1ae
WAA		 7237 *
7238 * The 4.1 client currently uses the same TCP connection for the
7239 * fore and backchannel.
7240 */
d9ddbf5d
TM		 7241static
7242int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
7243 struct rpc_xprt *xprt,
7244 struct nfs_client *clp,
7245 struct rpc_cred *cred)
7c44f1ae
WAA		 7246{
7247 int status;
71a097c6
TM		 7248 struct nfs41_bind_conn_to_session_args args = {
7249 .client = clp,
7250 .dir = NFS4_CDFC4_FORE_OR_BOTH,
7251 };
7c44f1ae
WAA		 7252 struct nfs41_bind_conn_to_session_res res;
7253 struct rpc_message msg = {
7254 .rpc_proc =
7255 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 7256 .rpc_argp = &args,
7c44f1ae 7257 .rpc_resp = &res,
2cf047c9 7258 .rpc_cred = cred,
7c44f1ae 7259 };
d9ddbf5d
TM		 7260 struct rpc_task_setup task_setup_data = {
7261 .rpc_client = clnt,
7262 .rpc_xprt = xprt,
02a95dee 7263 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
d9ddbf5d
TM		 7264 .rpc_message = &msg,
7265 .flags = RPC_TASK_TIMEOUT,
7266 };
7267 struct rpc_task *task;
7c44f1ae
WAA		 7268
7269 dprintk("--> %s\n", __func__);
7c44f1ae 7270
71a097c6
TM		 7271 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
7272 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
7273 args.dir = NFS4_CDFC4_FORE;
7c44f1ae 7274
d9ddbf5d
TM		 7275 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
7276 if (xprt != rcu_access_pointer(clnt->cl_xprt))
7277 args.dir = NFS4_CDFC4_FORE;
7278
7279 task = rpc_run_task(&task_setup_data);
7280 if (!IS_ERR(task)) {
7281 status = task->tk_status;
7282 rpc_put_task(task);
7283 } else
7284 status = PTR_ERR(task);
c6d01c6f 7285 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 7286 if (status == 0) {
71a097c6 7287 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 7288 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
7289 dprintk("NFS: %s: Session ID mismatch\n", __func__);
7290 status = -EIO;
71a097c6 7291 goto out;
7c44f1ae 7292 }
71a097c6 7293 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 7294 dprintk("NFS: %s: Unexpected direction from server\n",
7295 __func__);
7296 status = -EIO;
71a097c6 7297 goto out;
7c44f1ae 7298 }
71a097c6 7299 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 7300 dprintk("NFS: %s: Server returned RDMA mode = true\n",
7301 __func__);
7302 status = -EIO;
71a097c6 7303 goto out;
7c44f1ae
WAA		 7304 }
7305 }
7c44f1ae
WAA		 7306out:
7307 dprintk("<-- %s status= %d\n", __func__, status);
7308 return status;
7309}
7310
d9ddbf5d
TM		 7311struct rpc_bind_conn_calldata {
7312 struct nfs_client *clp;
7313 struct rpc_cred *cred;
7314};
7315
7316static int
7317nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
7318 struct rpc_xprt *xprt,
7319 void *calldata)
7320{
7321 struct rpc_bind_conn_calldata *p = calldata;
7322
7323 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
7324}
7325
7326int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7327{
7328 struct rpc_bind_conn_calldata data = {
7329 .clp = clp,
7330 .cred = cred,
7331 };
7332 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
7333 nfs4_proc_bind_conn_to_session_callback, &data);
7334}
7335
99fe60d0 7336/*
fa940720
WAA		 7337 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
7338 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 7339 */
7340static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
7341 .how = SP4_MACH_CRED,
7342 .enforce.u.words = {
7343 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7344 1 << (OP_EXCHANGE_ID - 32) |
7345 1 << (OP_CREATE_SESSION - 32) |
7346 1 << (OP_DESTROY_SESSION - 32) |
7347 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 7348 },
7349 .allow.u.words = {
7350 [0] = 1 << (OP_CLOSE) |
99ade3c7 7351 1 << (OP_OPEN_DOWNGRADE) |
a0279625 7352 1 << (OP_LOCKU) |
99ade3c7 7353 1 << (OP_DELEGRETURN) |
a0279625 7354 1 << (OP_COMMIT),
8b5bee2e 7355 [1] = 1 << (OP_SECINFO - 32) |
3787d506 7356 1 << (OP_SECINFO_NO_NAME - 32) |
99ade3c7 7357 1 << (OP_LAYOUTRETURN - 32) |
3787d506 7358 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 7359 1 << (OP_FREE_STATEID - 32) |
7360 1 << (OP_WRITE - 32)
2031cd1a
WAA		 7361 }
7362};
7363
7364/*
7365 * Select the state protection mode for client `clp' given the server results
7366 * from exchange_id in `sp'.
99fe60d0 7367 *
2031cd1a
WAA		 7368 * Returns 0 on success, negative errno otherwise.
7369 */
7370static int nfs4_sp4_select_mode(struct nfs_client *clp,
7371 struct nfs41_state_protection *sp)
7372{
7373 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
7374 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7375 1 << (OP_EXCHANGE_ID - 32) |
7376 1 << (OP_CREATE_SESSION - 32) |
7377 1 << (OP_DESTROY_SESSION - 32) |
7378 1 << (OP_DESTROY_CLIENTID - 32)
7379 };
7380 unsigned int i;
7381
7382 if (sp->how == SP4_MACH_CRED) {
7383 /* Print state protect result */
7384 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
7385 for (i = 0; i <= LAST_NFS4_OP; i++) {
7386 if (test_bit(i, sp->enforce.u.longs))
7387 dfprintk(MOUNT, " enforce op %d\n", i);
7388 if (test_bit(i, sp->allow.u.longs))
7389 dfprintk(MOUNT, " allow op %d\n", i);
7390 }
7391
7392 /* make sure nothing is on enforce list that isn't supported */
7393 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
7394 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
7395 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7396 return -EINVAL;
7397 }
7398 }
7399
7400 /*
7401 * Minimal mode - state operations are allowed to use machine
7402 * credential. Note this already happens by default, so the
7403 * client doesn't have to do anything more than the negotiation.
7404 *
7405 * NOTE: we don't care if EXCHANGE_ID is in the list -
7406 * we're already using the machine cred for exchange_id
7407 * and will never use a different cred.
7408 */
7409 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
7410 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
7411 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
7412 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
7413 dfprintk(MOUNT, "sp4_mach_cred:\n");
7414 dfprintk(MOUNT, " minimal mode enabled\n");
7415 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
7416 } else {
7417 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7418 return -EINVAL;
7419 }
fa940720
WAA		 7420
7421 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
99ade3c7
AE		 7422 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
7423 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
fa940720
WAA		 7424 test_bit(OP_LOCKU, sp->allow.u.longs)) {
7425 dfprintk(MOUNT, " cleanup mode enabled\n");
7426 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
7427 }
8b5bee2e 7428
99ade3c7
AE		 7429 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
7430 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
7431 set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP,
7432 &clp->cl_sp4_flags);
7433 }
7434
8b5bee2e
WAA		 7435 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
7436 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
7437 dfprintk(MOUNT, " secinfo mode enabled\n");
7438 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
7439 }
3787d506
WAA		 7440
7441 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
7442 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
7443 dfprintk(MOUNT, " stateid mode enabled\n");
7444 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
7445 }
8c21c62c
WAA		 7446
7447 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
7448 dfprintk(MOUNT, " write mode enabled\n");
7449 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
7450 }
7451
7452 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
7453 dfprintk(MOUNT, " commit mode enabled\n");
7454 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
7455 }
2031cd1a
WAA		 7456 }
7457
7458 return 0;
7459}
7460
8d89bd70
AA		 7461struct nfs41_exchange_id_data {
7462 struct nfs41_exchange_id_res res;
7463 struct nfs41_exchange_id_args args;
ad0849a7 7464 struct rpc_xprt *xprt;
8d89bd70
AA		 7465 int rpc_status;
7466};
7467
7468static void nfs4_exchange_id_done(struct rpc_task *task, void *data)
7469{
7470 struct nfs41_exchange_id_data *cdata =
7471 (struct nfs41_exchange_id_data *)data;
7472 struct nfs_client *clp = cdata->args.client;
7473 int status = task->tk_status;
7474
7475 trace_nfs4_exchange_id(clp, status);
7476
7477 if (status == 0)
7478 status = nfs4_check_cl_exchange_flags(cdata->res.flags);
ad0849a7
AA		 7479
7480 if (cdata->xprt && status == 0) {
7481 status = nfs4_detect_session_trunking(clp, &cdata->res,
7482 cdata->xprt);
7483 goto out;
7484 }
7485
8d89bd70
AA		 7486 if (status == 0)
7487 status = nfs4_sp4_select_mode(clp, &cdata->res.state_protect);
7488
7489 if (status == 0) {
7490 clp->cl_clientid = cdata->res.clientid;
7491 clp->cl_exchange_flags = cdata->res.flags;
7492 /* Client ID is not confirmed */
7493 if (!(cdata->res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7494 clear_bit(NFS4_SESSION_ESTABLISHED,
7495 &clp->cl_session->session_state);
7496 clp->cl_seqid = cdata->res.seqid;
7497 }
7498
7499 kfree(clp->cl_serverowner);
7500 clp->cl_serverowner = cdata->res.server_owner;
7501 cdata->res.server_owner = NULL;
7502
7503 /* use the most recent implementation id */
7504 kfree(clp->cl_implid);
7505 clp->cl_implid = cdata->res.impl_id;
7506 cdata->res.impl_id = NULL;
7507
7508 if (clp->cl_serverscope != NULL &&
7509 !nfs41_same_server_scope(clp->cl_serverscope,
7510 cdata->res.server_scope)) {
7511 dprintk("%s: server_scope mismatch detected\n",
7512 __func__);
7513 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
7514 kfree(clp->cl_serverscope);
7515 clp->cl_serverscope = NULL;
7516 }
7517
7518 if (clp->cl_serverscope == NULL) {
7519 clp->cl_serverscope = cdata->res.server_scope;
7520 cdata->res.server_scope = NULL;
7521 }
ad0849a7
AA		 7522 /* Save the EXCHANGE_ID verifier session trunk tests */
7523 memcpy(clp->cl_confirm.data, cdata->args.verifier->data,
7524 sizeof(clp->cl_confirm.data));
8d89bd70 7525 }
ad0849a7 7526out:
8d89bd70 7527 cdata->rpc_status = status;
ad0849a7 7528 return;
8d89bd70
AA		 7529}
7530
7531static void nfs4_exchange_id_release(void *data)
7532{
7533 struct nfs41_exchange_id_data *cdata =
7534 (struct nfs41_exchange_id_data *)data;
7535
7536 nfs_put_client(cdata->args.client);
ad0849a7
AA		 7537 if (cdata->xprt) {
7538 xprt_put(cdata->xprt);
7539 rpc_clnt_xprt_switch_put(cdata->args.client->cl_rpcclient);
7540 }
8d89bd70
AA		 7541 kfree(cdata->res.impl_id);
7542 kfree(cdata->res.server_scope);
7543 kfree(cdata->res.server_owner);
7544 kfree(cdata);
7545}
7546
7547static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
7548 .rpc_call_done = nfs4_exchange_id_done,
7549 .rpc_release = nfs4_exchange_id_release,
7550};
7551
2031cd1a
WAA		 7552/*
7553 * _nfs4_proc_exchange_id()
6bbb4ae8 7554 *
2031cd1a 7555 * Wrapper for EXCHANGE_ID operation.
99fe60d0 7556 */
2031cd1a 7557static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
ad0849a7 7558 u32 sp4_how, struct rpc_xprt *xprt)
99fe60d0
BH		 7559{
7560 nfs4_verifier verifier;
99fe60d0
BH		 7561 struct rpc_message msg = {
7562 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
99fe60d0
BH		 7563 .rpc_cred = cred,
7564 };
8d89bd70
AA		 7565 struct rpc_task_setup task_setup_data = {
7566 .rpc_client = clp->cl_rpcclient,
7567 .callback_ops = &nfs4_exchange_id_call_ops,
7568 .rpc_message = &msg,
7569 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
7570 };
7571 struct nfs41_exchange_id_data *calldata;
7572 struct rpc_task *task;
7573 int status = -EIO;
7574
7575 if (!atomic_inc_not_zero(&clp->cl_count))
7576 goto out;
7577
7578 status = -ENOMEM;
7579 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7580 if (!calldata)
7581 goto out;
99fe60d0 7582
ad0849a7
AA		 7583 if (!xprt)
7584 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 7585
7586 status = nfs4_init_uniform_client_string(clp);
7587 if (status)
8d89bd70 7588 goto out_calldata;
3a6bb738
JL		 7589
7590 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6bbb4ae8 7591 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 7592 clp->cl_owner_id);
99fe60d0 7593
8d89bd70
AA		 7594 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
7595 GFP_NOFS);
7596 status = -ENOMEM;
7597 if (unlikely(calldata->res.server_owner == NULL))
7598 goto out_calldata;
78fe0f41 7599
8d89bd70 7600 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 7601 GFP_NOFS);
8d89bd70 7602 if (unlikely(calldata->res.server_scope == NULL))
acdeb69d 7603 goto out_server_owner;
78fe0f41 7604
8d89bd70
AA		 7605 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
7606 if (unlikely(calldata->res.impl_id == NULL))
7d2ed9ac 7607 goto out_server_scope;
7d2ed9ac 7608
2031cd1a
WAA		 7609 switch (sp4_how) {
7610 case SP4_NONE:
8d89bd70 7611 calldata->args.state_protect.how = SP4_NONE;
2031cd1a
WAA		 7612 break;
7613
7614 case SP4_MACH_CRED:
8d89bd70 7615 calldata->args.state_protect = nfs4_sp4_mach_cred_request;
2031cd1a
WAA		 7616 break;
7617
7618 default:
7619 /* unsupported! */
7620 WARN_ON_ONCE(1);
7621 status = -EINVAL;
6b55970b 7622 goto out_impl_id;
2031cd1a 7623 }
ad0849a7
AA		 7624 if (xprt) {
7625 calldata->xprt = xprt;
7626 task_setup_data.rpc_xprt = xprt;
7627 task_setup_data.flags =
7628 RPC_TASK_SOFT|RPC_TASK_SOFTCONN|RPC_TASK_ASYNC;
7629 calldata->args.verifier = &clp->cl_confirm;
7630 } else {
7631 calldata->args.verifier = &verifier;
7632 }
8d89bd70
AA		 7633 calldata->args.client = clp;
7634#ifdef CONFIG_NFS_V4_1_MIGRATION
7635 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7636 EXCHGID4_FLAG_BIND_PRINC_STATEID |
7637 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
7638#else
7639 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7640 EXCHGID4_FLAG_BIND_PRINC_STATEID,
7641#endif
7642 msg.rpc_argp = &calldata->args;
7643 msg.rpc_resp = &calldata->res;
7644 task_setup_data.callback_data = calldata;
2031cd1a 7645
8d89bd70
AA		 7646 task = rpc_run_task(&task_setup_data);
7647 if (IS_ERR(task)) {
7648 status = PTR_ERR(task);
7649 goto out_impl_id;
6b55970b 7650 }
7d2ed9ac 7651
ad0849a7
AA		 7652 if (!xprt) {
7653 status = rpc_wait_for_completion_task(task);
7654 if (!status)
7655 status = calldata->rpc_status;
7656 } else /* session trunking test */
8d89bd70 7657 status = calldata->rpc_status;
ad0849a7 7658
8d89bd70 7659 rpc_put_task(task);
abe9a6d5 7660out:
177313f1 7661 if (clp->cl_implid != NULL)
6bbb4ae8 7662 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 7663 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 7664 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 7665 clp->cl_implid->date.seconds,
7666 clp->cl_implid->date.nseconds);
6bbb4ae8 7667 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0 7668 return status;
8d89bd70
AA		 7669
7670out_impl_id:
7671 kfree(calldata->res.impl_id);
7672out_server_scope:
7673 kfree(calldata->res.server_scope);
7674out_server_owner:
7675 kfree(calldata->res.server_owner);
7676out_calldata:
7677 kfree(calldata);
7678 goto out;
99fe60d0
BH		 7679}
7680
2031cd1a
WAA		 7681/*
7682 * nfs4_proc_exchange_id()
7683 *
7684 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7685 *
7686 * Since the clientid has expired, all compounds using sessions
7687 * associated with the stale clientid will be returning
7688 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7689 * be in some phase of session reset.
7690 *
7691 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7692 */
7693int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7694{
7695 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7696 int status;
7697
7698 /* try SP4_MACH_CRED if krb5i/p */
7699 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7700 authflavor == RPC_AUTH_GSS_KRB5P) {
ad0849a7 7701 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED, NULL);
2031cd1a
WAA		 7702 if (!status)
7703 return 0;
7704 }
7705
7706 /* try SP4_NONE */
ad0849a7 7707 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE, NULL);
2031cd1a
WAA		 7708}
7709
04fa2c6b
AA		 7710/**
7711 * nfs4_test_session_trunk
7712 *
7713 * This is an add_xprt_test() test function called from
7714 * rpc_clnt_setup_test_and_add_xprt.
7715 *
7716 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt
7717 * and is dereferrenced in nfs4_exchange_id_release
7718 *
7719 * Upon success, add the new transport to the rpc_clnt
7720 *
7721 * @clnt: struct rpc_clnt to get new transport
7722 * @xprt: the rpc_xprt to test
7723 * @data: call data for _nfs4_proc_exchange_id.
7724 */
7725int nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
7726 void *data)
7727{
7728 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data;
7729 u32 sp4_how;
7730
7731 dprintk("--> %s try %s\n", __func__,
7732 xprt->address_strings[RPC_DISPLAY_ADDR]);
7733
7734 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED);
7735
7736 /* Test connection for session trunking. Async exchange_id call */
7737 return _nfs4_proc_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
2031cd1a 7738}
04fa2c6b 7739EXPORT_SYMBOL_GPL(nfs4_test_session_trunk);
2031cd1a 7740
66245539
TM		 7741static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7742 struct rpc_cred *cred)
7743{
7744 struct rpc_message msg = {
7745 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7746 .rpc_argp = clp,
7747 .rpc_cred = cred,
7748 };
7749 int status;
7750
7751 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7752 trace_nfs4_destroy_clientid(clp, status);
66245539 7753 if (status)
02c67525 7754 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7755 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7756 return status;
7757}
7758
7759static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7760 struct rpc_cred *cred)
7761{
7762 unsigned int loop;
7763 int ret;
7764
7765 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7766 ret = _nfs4_proc_destroy_clientid(clp, cred);
7767 switch (ret) {
7768 case -NFS4ERR_DELAY:
7769 case -NFS4ERR_CLIENTID_BUSY:
7770 ssleep(1);
7771 break;
7772 default:
7773 return ret;
7774 }
7775 }
7776 return 0;
7777}
7778
7779int nfs4_destroy_clientid(struct nfs_client *clp)
7780{
7781 struct rpc_cred *cred;
7782 int ret = 0;
7783
7784 if (clp->cl_mvops->minor_version < 1)
7785 goto out;
7786 if (clp->cl_exchange_flags == 0)
7787 goto out;
05f4c350
CL		 7788 if (clp->cl_preserve_clid)
7789 goto out;
73d8bde5 7790 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7791 ret = nfs4_proc_destroy_clientid(clp, cred);
7792 if (cred)
7793 put_rpccred(cred);
7794 switch (ret) {
7795 case 0:
7796 case -NFS4ERR_STALE_CLIENTID:
7797 clp->cl_exchange_flags = 0;
7798 }
7799out:
7800 return ret;
7801}
7802
2050f0cc
AA		 7803struct nfs4_get_lease_time_data {
7804 struct nfs4_get_lease_time_args *args;
7805 struct nfs4_get_lease_time_res *res;
7806 struct nfs_client *clp;
7807};
7808
7809static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7810 void *calldata)
7811{
2050f0cc
AA		 7812 struct nfs4_get_lease_time_data *data =
7813 (struct nfs4_get_lease_time_data *)calldata;
7814
7815 dprintk("--> %s\n", __func__);
7816 /* just setup sequence, do not trigger session recovery
7817 since we're invoked within one */
d9afbd1b
TM		 7818 nfs41_setup_sequence(data->clp->cl_session,
7819 &data->args->la_seq_args,
7820 &data->res->lr_seq_res,
7821 task);
2050f0cc
AA		 7822 dprintk("<-- %s\n", __func__);
7823}
7824
7825/*
7826 * Called from nfs4_state_manager thread for session setup, so don't recover
7827 * from sequence operation or clientid errors.
7828 */
7829static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7830{
7831 struct nfs4_get_lease_time_data *data =
7832 (struct nfs4_get_lease_time_data *)calldata;
7833
7834 dprintk("--> %s\n", __func__);
14516c3a
TM		 7835 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7836 return;
2050f0cc
AA		 7837 switch (task->tk_status) {
7838 case -NFS4ERR_DELAY:
7839 case -NFS4ERR_GRACE:
7840 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7841 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7842 task->tk_status = 0;
a8a4ae3a
AA		 7843 /* fall through */
7844 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7845 rpc_restart_call_prepare(task);
2050f0cc
AA		 7846 return;
7847 }
2050f0cc
AA		 7848 dprintk("<-- %s\n", __func__);
7849}
7850
17280175 7851static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7852 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7853 .rpc_call_done = nfs4_get_lease_time_done,
7854};
7855
7856int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7857{
7858 struct rpc_task *task;
7859 struct nfs4_get_lease_time_args args;
7860 struct nfs4_get_lease_time_res res = {
7861 .lr_fsinfo = fsinfo,
7862 };
7863 struct nfs4_get_lease_time_data data = {
7864 .args = &args,
7865 .res = &res,
7866 .clp = clp,
7867 };
7868 struct rpc_message msg = {
7869 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7870 .rpc_argp = &args,
7871 .rpc_resp = &res,
7872 };
7873 struct rpc_task_setup task_setup = {
7874 .rpc_client = clp->cl_rpcclient,
7875 .rpc_message = &msg,
7876 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7877 .callback_data = &data,
7878 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7879 };
7880 int status;
7881
a9c92d6b 7882 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7883 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7884 dprintk("--> %s\n", __func__);
7885 task = rpc_run_task(&task_setup);
7886
7887 if (IS_ERR(task))
7888 status = PTR_ERR(task);
7889 else {
7890 status = task->tk_status;
7891 rpc_put_task(task);
7892 }
7893 dprintk("<-- %s return %d\n", __func__, status);
7894
7895 return status;
7896}
7897
fc931582
AA		 7898/*
7899 * Initialize the values to be used by the client in CREATE_SESSION
7900 * If nfs4_init_session set the fore channel request and response sizes,
7901 * use them.
7902 *
7903 * Set the back channel max_resp_sz_cached to zero to force the client to
7904 * always set csa_cachethis to FALSE because the current implementation
7905 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7906 */
6b26cc8c
CL		 7907static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
7908 struct rpc_clnt *clnt)
fc931582 7909{
18aad3d5 7910 unsigned int max_rqst_sz, max_resp_sz;
6b26cc8c 7911 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
18aad3d5
AA		 7912
7913 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7914 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7915
fc931582 7916 /* Fore channel attributes */
18aad3d5
AA		 7917 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7918 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7919 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7920 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7921
7922 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7923 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7924 __func__,
7925 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7926 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7927
7928 /* Back channel attributes */
6b26cc8c
CL		 7929 args->bc_attrs.max_rqst_sz = max_bc_payload;
7930 args->bc_attrs.max_resp_sz = max_bc_payload;
fc931582
AA		 7931 args->bc_attrs.max_resp_sz_cached = 0;
7932 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5405fc44 7933 args->bc_attrs.max_reqs = min_t(unsigned short, max_session_cb_slots, 1);
fc931582
AA		 7934
7935 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7936 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7937 __func__,
7938 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7939 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7940 args->bc_attrs.max_reqs);
7941}
7942
79969dd1
TM		 7943static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7944 struct nfs41_create_session_res *res)
8d35301d 7945{
43c2e885 7946 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7947 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7948
43c2e885
BF		 7949 if (rcvd->max_resp_sz > sent->max_resp_sz)
7950 return -EINVAL;
7951 /*
7952 * Our requested max_ops is the minimum we need; we're not
7953 * prepared to break up compounds into smaller pieces than that.
7954 * So, no point even trying to continue if the server won't
7955 * cooperate:
7956 */
7957 if (rcvd->max_ops < sent->max_ops)
7958 return -EINVAL;
7959 if (rcvd->max_reqs == 0)
7960 return -EINVAL;
b4b9a0c1
VG		 7961 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7962 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7963 return 0;
8d35301d
AA		 7964}
7965
79969dd1
TM		 7966static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7967 struct nfs41_create_session_res *res)
43c2e885
BF		 7968{
7969 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7970 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7971
b1c0df5f
TM		 7972 if (!(res->flags & SESSION4_BACK_CHAN))
7973 goto out;
43c2e885
BF		 7974 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7975 return -EINVAL;
7976 if (rcvd->max_resp_sz < sent->max_resp_sz)
7977 return -EINVAL;
7978 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7979 return -EINVAL;
5405fc44 7980 if (rcvd->max_ops > sent->max_ops)
43c2e885 7981 return -EINVAL;
5405fc44 7982 if (rcvd->max_reqs > sent->max_reqs)
43c2e885 7983 return -EINVAL;
b1c0df5f 7984out:
43c2e885
BF		 7985 return 0;
7986}
8d35301d 7987
8d35301d 7988static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7989 struct nfs41_create_session_res *res)
8d35301d 7990{
43c2e885 7991 int ret;
8d35301d 7992
79969dd1 7993 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7994 if (ret)
7995 return ret;
79969dd1
TM		 7996 return nfs4_verify_back_channel_attrs(args, res);
7997}
7998
7999static void nfs4_update_session(struct nfs4_session *session,
8000 struct nfs41_create_session_res *res)
8001{
8002 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 8003 /* Mark client id and session as being confirmed */
8004 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
8005 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 8006 session->flags = res->flags;
8007 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 8008 if (res->flags & SESSION4_BACK_CHAN)
8009 memcpy(&session->bc_attrs, &res->bc_attrs,
8010 sizeof(session->bc_attrs));
8d35301d
AA		 8011}
8012
848f5bda
TM		 8013static int _nfs4_proc_create_session(struct nfs_client *clp,
8014 struct rpc_cred *cred)
fc931582
AA		 8015{
8016 struct nfs4_session *session = clp->cl_session;
8017 struct nfs41_create_session_args args = {
8018 .client = clp,
79969dd1
TM		 8019 .clientid = clp->cl_clientid,
8020 .seqid = clp->cl_seqid,
fc931582
AA		 8021 .cb_program = NFS4_CALLBACK,
8022 };
79969dd1
TM		 8023 struct nfs41_create_session_res res;
8024
fc931582
AA		 8025 struct rpc_message msg = {
8026 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
8027 .rpc_argp = &args,
8028 .rpc_resp = &res,
848f5bda 8029 .rpc_cred = cred,
fc931582
AA		 8030 };
8031 int status;
8032
6b26cc8c 8033 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
0f91421e 8034 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 8035
1bd714f2 8036 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 8037 trace_nfs4_create_session(clp, status);
fc931582 8038
b519d408
TM		 8039 switch (status) {
8040 case -NFS4ERR_STALE_CLIENTID:
8041 case -NFS4ERR_DELAY:
8042 case -ETIMEDOUT:
8043 case -EACCES:
8044 case -EAGAIN:
8045 goto out;
8046 };
8047
8048 clp->cl_seqid++;
43095d39 8049 if (!status) {
8d35301d 8050 /* Verify the session's negotiated channel_attrs values */
79969dd1 8051 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 8052 /* Increment the clientid slot sequence id */
79969dd1
TM		 8053 if (status)
8054 goto out;
8055 nfs4_update_session(session, &res);
fc931582 8056 }
79969dd1 8057out:
fc931582
AA		 8058 return status;
8059}
8060
8061/*
8062 * Issues a CREATE_SESSION operation to the server.
8063 * It is the responsibility of the caller to verify the session is
8064 * expired before calling this routine.
8065 */
848f5bda 8066int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 8067{
8068 int status;
8069 unsigned *ptr;
fc931582
AA		 8070 struct nfs4_session *session = clp->cl_session;
8071
8072 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
8073
848f5bda 8074 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 8075 if (status)
8076 goto out;
8077
aacd5537
AA		 8078 /* Init or reset the session slot tables */
8079 status = nfs4_setup_session_slot_tables(session);
8080 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 8081 if (status)
8082 goto out;
8083
8084 ptr = (unsigned *)&session->sess_id.data[0];
8085 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
8086 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 8087out:
8088 dprintk("<-- %s\n", __func__);
8089 return status;
8090}
8091
0f3e66c6
AA		 8092/*
8093 * Issue the over-the-wire RPC DESTROY_SESSION.
8094 * The caller must serialize access to this routine.
8095 */
848f5bda
TM		 8096int nfs4_proc_destroy_session(struct nfs4_session *session,
8097 struct rpc_cred *cred)
0f3e66c6 8098{
848f5bda
TM		 8099 struct rpc_message msg = {
8100 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
8101 .rpc_argp = session,
8102 .rpc_cred = cred,
8103 };
0f3e66c6 8104 int status = 0;
0f3e66c6
AA		 8105
8106 dprintk("--> nfs4_proc_destroy_session\n");
8107
8108 /* session is still being setup */
e11259f9
TM		 8109 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
8110 return 0;
0f3e66c6 8111
1bd714f2 8112 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 8113 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 8114
8115 if (status)
08106ac7 8116 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 8117 "Session has been destroyed regardless...\n", status);
8118
8119 dprintk("<-- nfs4_proc_destroy_session\n");
8120 return status;
8121}
8122
fc01cea9
AA		 8123/*
8124 * Renew the cl_session lease.
8125 */
d5f8d3fe
TM		 8126struct nfs4_sequence_data {
8127 struct nfs_client *clp;
8128 struct nfs4_sequence_args args;
8129 struct nfs4_sequence_res res;
8130};
8131
dc96aef9
AB		 8132static void nfs41_sequence_release(void *data)
8133{
d5f8d3fe
TM		 8134 struct nfs4_sequence_data *calldata = data;
8135 struct nfs_client *clp = calldata->clp;
dc96aef9 8136
7135840f
AB		 8137 if (atomic_read(&clp->cl_count) > 1)
8138 nfs4_schedule_state_renewal(clp);
8139 nfs_put_client(clp);
d5f8d3fe 8140 kfree(calldata);
dc96aef9
AB		 8141}
8142
aa5190d0
TM		 8143static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8144{
8145 switch(task->tk_status) {
8146 case -NFS4ERR_DELAY:
aa5190d0
TM		 8147 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8148 return -EAGAIN;
8149 default:
0400a6b0 8150 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 8151 }
8152 return 0;
8153}
8154
dc96aef9 8155static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 8156{
d5f8d3fe
TM		 8157 struct nfs4_sequence_data *calldata = data;
8158 struct nfs_client *clp = calldata->clp;
fc01cea9 8159
14516c3a
TM		 8160 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
8161 return;
fc01cea9 8162
c6d01c6f 8163 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 8164 if (task->tk_status < 0) {
8165 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 8166 if (atomic_read(&clp->cl_count) == 1)
8167 goto out;
fc01cea9 8168
aa5190d0
TM		 8169 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
8170 rpc_restart_call_prepare(task);
fc01cea9
AA		 8171 return;
8172 }
8173 }
fc01cea9 8174 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 8175out:
fc01cea9
AA		 8176 dprintk("<-- %s\n", __func__);
8177}
8178
8179static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
8180{
d5f8d3fe
TM		 8181 struct nfs4_sequence_data *calldata = data;
8182 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 8183 struct nfs4_sequence_args *args;
8184 struct nfs4_sequence_res *res;
8185
fc01cea9
AA		 8186 args = task->tk_msg.rpc_argp;
8187 res = task->tk_msg.rpc_resp;
8188
d9afbd1b 8189 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 8190}
8191
8192static const struct rpc_call_ops nfs41_sequence_ops = {
8193 .rpc_call_done = nfs41_sequence_call_done,
8194 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 8195 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 8196};
8197
8fe72bac
TM		 8198static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
8199 struct rpc_cred *cred,
8200 bool is_privileged)
fc01cea9 8201{
d5f8d3fe 8202 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 8203 struct rpc_message msg = {
8204 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
8205 .rpc_cred = cred,
8206 };
71ac6da9
TM		 8207 struct rpc_task_setup task_setup_data = {
8208 .rpc_client = clp->cl_rpcclient,
8209 .rpc_message = &msg,
8fe72bac 8210 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 8211 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 8212 };
fc01cea9 8213
7135840f 8214 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 8215 return ERR_PTR(-EIO);
dfb4f309 8216 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 8217 if (calldata == NULL) {
7135840f 8218 nfs_put_client(clp);
71ac6da9 8219 return ERR_PTR(-ENOMEM);
fc01cea9 8220 }
a9c92d6b 8221 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 8222 if (is_privileged)
8223 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 8224 msg.rpc_argp = &calldata->args;
8225 msg.rpc_resp = &calldata->res;
8226 calldata->clp = clp;
71ac6da9 8227 task_setup_data.callback_data = calldata;
fc01cea9 8228
71ac6da9
TM		 8229 return rpc_run_task(&task_setup_data);
8230}
8231
2f60ea6b 8232static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 8233{
8234 struct rpc_task *task;
8235 int ret = 0;
8236
2f60ea6b 8237 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 8238 return -EAGAIN;
8fe72bac 8239 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 8240 if (IS_ERR(task))
8241 ret = PTR_ERR(task);
8242 else
bf294b41 8243 rpc_put_task_async(task);
71ac6da9
TM		 8244 dprintk("<-- %s status=%d\n", __func__, ret);
8245 return ret;
8246}
8247
8248static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
8249{
8250 struct rpc_task *task;
8251 int ret;
8252
8fe72bac 8253 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 8254 if (IS_ERR(task)) {
8255 ret = PTR_ERR(task);
8256 goto out;
8257 }
8258 ret = rpc_wait_for_completion_task(task);
be824167 8259 if (!ret)
71ac6da9
TM		 8260 ret = task->tk_status;
8261 rpc_put_task(task);
8262out:
8263 dprintk("<-- %s status=%d\n", __func__, ret);
8264 return ret;
fc01cea9
AA		 8265}
8266
fce5c838
RL		 8267struct nfs4_reclaim_complete_data {
8268 struct nfs_client *clp;
8269 struct nfs41_reclaim_complete_args arg;
8270 struct nfs41_reclaim_complete_res res;
8271};
8272
8273static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
8274{
8275 struct nfs4_reclaim_complete_data *calldata = data;
8276
d9afbd1b
TM		 8277 nfs41_setup_sequence(calldata->clp->cl_session,
8278 &calldata->arg.seq_args,
8279 &calldata->res.seq_res,
8280 task);
fce5c838
RL		 8281}
8282
aa5190d0
TM		 8283static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8284{
8285 switch(task->tk_status) {
8286 case 0:
8287 case -NFS4ERR_COMPLETE_ALREADY:
8288 case -NFS4ERR_WRONG_CRED: /* What to do here? */
8289 break;
8290 case -NFS4ERR_DELAY:
aa5190d0 8291 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 8292 /* fall through */
8293 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 8294 return -EAGAIN;
8295 default:
0400a6b0 8296 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 8297 }
8298 return 0;
8299}
8300
fce5c838
RL		 8301static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
8302{
8303 struct nfs4_reclaim_complete_data *calldata = data;
8304 struct nfs_client *clp = calldata->clp;
8305 struct nfs4_sequence_res *res = &calldata->res.seq_res;
8306
8307 dprintk("--> %s\n", __func__);
14516c3a
TM		 8308 if (!nfs41_sequence_done(task, res))
8309 return;
fce5c838 8310
c6d01c6f 8311 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 8312 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
8313 rpc_restart_call_prepare(task);
8314 return;
8315 }
fce5c838
RL		 8316 dprintk("<-- %s\n", __func__);
8317}
8318
8319static void nfs4_free_reclaim_complete_data(void *data)
8320{
8321 struct nfs4_reclaim_complete_data *calldata = data;
8322
8323 kfree(calldata);
8324}
8325
8326static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
8327 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
8328 .rpc_call_done = nfs4_reclaim_complete_done,
8329 .rpc_release = nfs4_free_reclaim_complete_data,
8330};
8331
8332/*
8333 * Issue a global reclaim complete.
8334 */
965e9c23
TM		 8335static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
8336 struct rpc_cred *cred)
fce5c838
RL		 8337{
8338 struct nfs4_reclaim_complete_data *calldata;
8339 struct rpc_task *task;
8340 struct rpc_message msg = {
8341 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 8342 .rpc_cred = cred,
fce5c838
RL		 8343 };
8344 struct rpc_task_setup task_setup_data = {
8345 .rpc_client = clp->cl_rpcclient,
8346 .rpc_message = &msg,
8347 .callback_ops = &nfs4_reclaim_complete_call_ops,
8348 .flags = RPC_TASK_ASYNC,
8349 };
8350 int status = -ENOMEM;
8351
8352 dprintk("--> %s\n", __func__);
8535b2be 8353 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 8354 if (calldata == NULL)
8355 goto out;
8356 calldata->clp = clp;
8357 calldata->arg.one_fs = 0;
fce5c838 8358
a9c92d6b 8359 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 8360 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 8361 msg.rpc_argp = &calldata->arg;
8362 msg.rpc_resp = &calldata->res;
8363 task_setup_data.callback_data = calldata;
8364 task = rpc_run_task(&task_setup_data);
acf82b85 8365 if (IS_ERR(task)) {
fce5c838 8366 status = PTR_ERR(task);
acf82b85
DC		 8367 goto out;
8368 }
c34c32ea
AA		 8369 status = nfs4_wait_for_completion_rpc_task(task);
8370 if (status == 0)
8371 status = task->tk_status;
fce5c838 8372 rpc_put_task(task);
acf82b85 8373 return 0;
fce5c838
RL		 8374out:
8375 dprintk("<-- %s status=%d\n", __func__, status);
8376 return status;
8377}
b1f69b75
AA		 8378
8379static void
8380nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
8381{
8382 struct nfs4_layoutget *lgp = calldata;
c31663d4 8383 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 8384 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 8385
8386 dprintk("--> %s\n", __func__);
183d9e7b
JL		 8387 nfs41_setup_sequence(session, &lgp->args.seq_args,
8388 &lgp->res.seq_res, task);
8389 dprintk("<-- %s\n", __func__);
b1f69b75
AA		 8390}
8391
8392static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
8393{
8394 struct nfs4_layoutget *lgp = calldata;
183d9e7b
JL		 8395
8396 dprintk("--> %s\n", __func__);
2e80dbe7 8397 nfs41_sequence_process(task, &lgp->res.seq_res);
183d9e7b
JL		 8398 dprintk("<-- %s\n", __func__);
8399}
8400
8401static int
8402nfs4_layoutget_handle_exception(struct rpc_task *task,
8403 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
8404{
ee314c2a
TM		 8405 struct inode *inode = lgp->args.inode;
8406 struct nfs_server *server = NFS_SERVER(inode);
8407 struct pnfs_layout_hdr *lo;
e85d7ee4
TM		 8408 int nfs4err = task->tk_status;
8409 int err, status = 0;
f7db0b28 8410 LIST_HEAD(head);
b1f69b75 8411
ed7e5423 8412 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 8413
e85d7ee4 8414 switch (nfs4err) {
b1f69b75 8415 case 0:
ee314c2a 8416 goto out;
7c1e6e58
PT		 8417
8418 /*
8419 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
8420 * on the file. set tk_status to -ENODATA to tell upper layer to
8421 * retry go inband.
8422 */
8423 case -NFS4ERR_LAYOUTUNAVAILABLE:
183d9e7b 8424 status = -ENODATA;
7c1e6e58 8425 goto out;
21b874c8
TM		 8426 /*
8427 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
8428 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
8429 */
8430 case -NFS4ERR_BADLAYOUT:
183d9e7b
JL		 8431 status = -EOVERFLOW;
8432 goto out;
ed7e5423
BH		 8433 /*
8434 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
21b874c8
TM		 8435 * (or clients) writing to the same RAID stripe except when
8436 * the minlength argument is 0 (see RFC5661 section 18.43.3).
183d9e7b
JL		 8437 *
8438 * Treat it like we would RECALLCONFLICT -- we retry for a little
8439 * while, and then eventually give up.
ed7e5423 8440 */
b1f69b75 8441 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b
JL		 8442 if (lgp->args.minlength == 0) {
8443 status = -EOVERFLOW;
8444 goto out;
ed7e5423 8445 }
e85d7ee4
TM		 8446 status = -EBUSY;
8447 break;
183d9e7b 8448 case -NFS4ERR_RECALLCONFLICT:
183d9e7b 8449 status = -ERECALLCONFLICT;
e85d7ee4 8450 break;
26f47443
TM		 8451 case -NFS4ERR_DELEG_REVOKED:
8452 case -NFS4ERR_ADMIN_REVOKED:
ee314c2a
TM		 8453 case -NFS4ERR_EXPIRED:
8454 case -NFS4ERR_BAD_STATEID:
183d9e7b 8455 exception->timeout = 0;
ee314c2a 8456 spin_lock(&inode->i_lock);
f7db0b28
TM		 8457 lo = NFS_I(inode)->layout;
8458 /* If the open stateid was bad, then recover it. */
8459 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
8460 nfs4_stateid_match_other(&lgp->args.stateid,
2259f960 8461 &lgp->args.ctx->state->stateid)) {
ee314c2a 8462 spin_unlock(&inode->i_lock);
183d9e7b 8463 exception->state = lgp->args.ctx->state;
26f47443 8464 exception->stateid = &lgp->args.stateid;
2259f960
TM		 8465 break;
8466 }
f7db0b28
TM		 8467
8468 /*
8469 * Mark the bad layout state as invalid, then retry
8470 */
668f455d 8471 pnfs_mark_layout_stateid_invalid(lo, &head);
f7db0b28
TM		 8472 spin_unlock(&inode->i_lock);
8473 pnfs_free_lseg_list(&head);
8474 status = -EAGAIN;
8475 goto out;
b1f69b75 8476 }
183d9e7b 8477
e85d7ee4
TM		 8478 err = nfs4_handle_exception(server, nfs4err, exception);
8479 if (!status) {
8480 if (exception->retry)
8481 status = -EAGAIN;
8482 else
8483 status = err;
8484 }
ee314c2a 8485out:
b1f69b75 8486 dprintk("<-- %s\n", __func__);
183d9e7b 8487 return status;
b1f69b75
AA		 8488}
8489
8554116e
IK		 8490static size_t max_response_pages(struct nfs_server *server)
8491{
8492 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
8493 return nfs_page_array_len(0, max_resp_sz);
8494}
8495
8496static void nfs4_free_pages(struct page **pages, size_t size)
8497{
8498 int i;
8499
8500 if (!pages)
8501 return;
8502
8503 for (i = 0; i < size; i++) {
8504 if (!pages[i])
8505 break;
8506 __free_page(pages[i]);
8507 }
8508 kfree(pages);
8509}
8510
8511static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
8512{
8513 struct page **pages;
8514 int i;
8515
8516 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
8517 if (!pages) {
8518 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
8519 return NULL;
8520 }
8521
8522 for (i = 0; i < size; i++) {
8523 pages[i] = alloc_page(gfp_flags);
8524 if (!pages[i]) {
8525 dprintk("%s: failed to allocate page\n", __func__);
8526 nfs4_free_pages(pages, size);
8527 return NULL;
8528 }
8529 }
8530
8531 return pages;
8532}
8533
b1f69b75
AA		 8534static void nfs4_layoutget_release(void *calldata)
8535{
8536 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 8537 struct inode *inode = lgp->args.inode;
8538 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8539 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8540
8541 dprintk("--> %s\n", __func__);
8554116e 8542 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 8543 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 8544 put_nfs_open_context(lgp->args.ctx);
8545 kfree(calldata);
8546 dprintk("<-- %s\n", __func__);
8547}
8548
8549static const struct rpc_call_ops nfs4_layoutget_call_ops = {
8550 .rpc_call_prepare = nfs4_layoutget_prepare,
8551 .rpc_call_done = nfs4_layoutget_done,
8552 .rpc_release = nfs4_layoutget_release,
8553};
8554
a0b0a6e3 8555struct pnfs_layout_segment *
183d9e7b 8556nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags)
b1f69b75 8557{
a47970ff
WAA		 8558 struct inode *inode = lgp->args.inode;
8559 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8560 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8561 struct rpc_task *task;
8562 struct rpc_message msg = {
8563 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
8564 .rpc_argp = &lgp->args,
8565 .rpc_resp = &lgp->res,
6ab59344 8566 .rpc_cred = lgp->cred,
b1f69b75
AA		 8567 };
8568 struct rpc_task_setup task_setup_data = {
8569 .rpc_client = server->client,
8570 .rpc_message = &msg,
8571 .callback_ops = &nfs4_layoutget_call_ops,
8572 .callback_data = lgp,
8573 .flags = RPC_TASK_ASYNC,
8574 };
a0b0a6e3 8575 struct pnfs_layout_segment *lseg = NULL;
bc23676c
TM		 8576 struct nfs4_exception exception = {
8577 .inode = inode,
8578 .timeout = *timeout,
8579 };
b1f69b75
AA		 8580 int status = 0;
8581
8582 dprintk("--> %s\n", __func__);
8583
4bd5a980
PT		 8584 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
8585 pnfs_get_layout_hdr(NFS_I(inode)->layout);
8586
8554116e
IK		 8587 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
8588 if (!lgp->args.layout.pages) {
8589 nfs4_layoutget_release(lgp);
a0b0a6e3 8590 return ERR_PTR(-ENOMEM);
8554116e
IK		 8591 }
8592 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
8593
35124a09 8594 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 8595 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 8596 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 8597
b1f69b75
AA		 8598 task = rpc_run_task(&task_setup_data);
8599 if (IS_ERR(task))
a0b0a6e3 8600 return ERR_CAST(task);
b1f69b75 8601 status = nfs4_wait_for_completion_rpc_task(task);
183d9e7b
JL		 8602 if (status == 0) {
8603 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
8604 *timeout = exception.timeout;
8605 }
8606
1037e6ea
TM		 8607 trace_nfs4_layoutget(lgp->args.ctx,
8608 &lgp->args.range,
8609 &lgp->res.range,
48c9579a 8610 &lgp->res.stateid,
1037e6ea 8611 status);
183d9e7b 8612
085b7a45
WAA		 8613 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8614 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 8615 lseg = pnfs_layout_process(lgp);
2e80dbe7 8616 nfs4_sequence_free_slot(&lgp->res.seq_res);
b1f69b75
AA		 8617 rpc_put_task(task);
8618 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 8619 if (status)
8620 return ERR_PTR(status);
8621 return lseg;
b1f69b75
AA		 8622}
8623
cbe82603
BH		 8624static void
8625nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8626{
8627 struct nfs4_layoutreturn *lrp = calldata;
8628
8629 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 8630 nfs41_setup_sequence(lrp->clp->cl_session,
8631 &lrp->args.seq_args,
8632 &lrp->res.seq_res,
8633 task);
cbe82603
BH		 8634}
8635
8636static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8637{
8638 struct nfs4_layoutreturn *lrp = calldata;
8639 struct nfs_server *server;
8640
8641 dprintk("--> %s\n", __func__);
8642
2e80dbe7 8643 if (!nfs41_sequence_process(task, &lrp->res.seq_res))
cbe82603
BH		 8644 return;
8645
8646 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 8647 switch (task->tk_status) {
8648 default:
8649 task->tk_status = 0;
8650 case 0:
8651 break;
8652 case -NFS4ERR_DELAY:
8478eaa1 8653 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 8654 break;
2e80dbe7 8655 nfs4_sequence_free_slot(&lrp->res.seq_res);
d00c5d43 8656 rpc_restart_call_prepare(task);
cbe82603
BH		 8657 return;
8658 }
cbe82603
BH		 8659 dprintk("<-- %s\n", __func__);
8660}
8661
8662static void nfs4_layoutreturn_release(void *calldata)
8663{
8664 struct nfs4_layoutreturn *lrp = calldata;
849b286f 8665 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 8666
8667 dprintk("--> %s\n", __func__);
2a974425 8668 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range,
68f74479 8669 lrp->res.lrs_present ? &lrp->res.stateid : NULL);
2e80dbe7 8670 nfs4_sequence_free_slot(&lrp->res.seq_res);
4d796d75
TM		 8671 if (lrp->ld_private.ops && lrp->ld_private.ops->free)
8672 lrp->ld_private.ops->free(&lrp->ld_private);
2f065ddb
TM		 8673 pnfs_put_layout_hdr(lrp->args.layout);
8674 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 8675 kfree(calldata);
8676 dprintk("<-- %s\n", __func__);
8677}
8678
8679static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8680 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8681 .rpc_call_done = nfs4_layoutreturn_done,
8682 .rpc_release = nfs4_layoutreturn_release,
8683};
8684
6c16605d 8685int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 8686{
8687 struct rpc_task *task;
8688 struct rpc_message msg = {
8689 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8690 .rpc_argp = &lrp->args,
8691 .rpc_resp = &lrp->res,
9556000d 8692 .rpc_cred = lrp->cred,
cbe82603
BH		 8693 };
8694 struct rpc_task_setup task_setup_data = {
1771c577 8695 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8696 .rpc_message = &msg,
8697 .callback_ops = &nfs4_layoutreturn_call_ops,
8698 .callback_data = lrp,
8699 };
6c16605d 8700 int status = 0;
cbe82603 8701
99ade3c7
AE		 8702 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
8703 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
8704 &task_setup_data.rpc_client, &msg);
8705
cbe82603 8706 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8707 if (!sync) {
8708 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8709 if (!lrp->inode) {
8710 nfs4_layoutreturn_release(lrp);
8711 return -EAGAIN;
8712 }
8713 task_setup_data.flags |= RPC_TASK_ASYNC;
8714 }
a9c92d6b 8715 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8716 task = rpc_run_task(&task_setup_data);
8717 if (IS_ERR(task))
8718 return PTR_ERR(task);
5a0ec8ac
TM		 8719 if (sync)
8720 status = task->tk_status;
48c9579a 8721 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
cbe82603
BH		 8722 dprintk("<-- %s status=%d\n", __func__, status);
8723 rpc_put_task(task);
8724 return status;
8725}
8726
b1f69b75 8727static int
cd5875fe
TM		 8728_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8729 struct pnfs_device *pdev,
8730 struct rpc_cred *cred)
b1f69b75
AA		 8731{
8732 struct nfs4_getdeviceinfo_args args = {
8733 .pdev = pdev,
4e590803
TM		 8734 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8735 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8736 };
8737 struct nfs4_getdeviceinfo_res res = {
8738 .pdev = pdev,
8739 };
8740 struct rpc_message msg = {
8741 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8742 .rpc_argp = &args,
8743 .rpc_resp = &res,
cd5875fe 8744 .rpc_cred = cred,
b1f69b75
AA		 8745 };
8746 int status;
8747
8748 dprintk("--> %s\n", __func__);
7c513058 8749 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8750 if (res.notification & ~args.notify_types)
8751 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8752 if (res.notification != args.notify_types)
8753 pdev->nocache = 1;
4e590803 8754
b1f69b75
AA		 8755 dprintk("<-- %s status=%d\n", __func__, status);
8756
8757 return status;
8758}
8759
cd5875fe
TM		 8760int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8761 struct pnfs_device *pdev,
8762 struct rpc_cred *cred)
b1f69b75
AA		 8763{
8764 struct nfs4_exception exception = { };
8765 int err;
8766
8767 do {
8768 err = nfs4_handle_exception(server,
cd5875fe 8769 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8770 &exception);
8771 } while (exception.retry);
8772 return err;
8773}
8774EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8775
863a3c6c
AA		 8776static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8777{
8778 struct nfs4_layoutcommit_data *data = calldata;
8779 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 8780 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 8781
d9afbd1b
TM		 8782 nfs41_setup_sequence(session,
8783 &data->args.seq_args,
8784 &data->res.seq_res,
8785 task);
863a3c6c
AA		 8786}
8787
8788static void
8789nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8790{
8791 struct nfs4_layoutcommit_data *data = calldata;
8792 struct nfs_server *server = NFS_SERVER(data->args.inode);
8793
6ba7db34 8794 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8795 return;
8796
8797 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8798 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8799 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8800 case -NFS4ERR_BADLAYOUT: /* no layout */
8801 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8802 task->tk_status = 0;
e59d27e0 8803 case 0:
e59d27e0
TM		 8804 break;
8805 default:
8478eaa1 8806 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8807 rpc_restart_call_prepare(task);
8808 return;
8809 }
8810 }
863a3c6c
AA		 8811}
8812
8813static void nfs4_layoutcommit_release(void *calldata)
8814{
8815 struct nfs4_layoutcommit_data *data = calldata;
8816
db29c089 8817 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8818 nfs_post_op_update_inode_force_wcc(data->args.inode,
8819 data->res.fattr);
863a3c6c 8820 put_rpccred(data->cred);
472e2594 8821 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8822 kfree(data);
8823}
8824
8825static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8826 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8827 .rpc_call_done = nfs4_layoutcommit_done,
8828 .rpc_release = nfs4_layoutcommit_release,
8829};
8830
8831int
ef311537 8832nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8833{
8834 struct rpc_message msg = {
8835 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8836 .rpc_argp = &data->args,
8837 .rpc_resp = &data->res,
8838 .rpc_cred = data->cred,
8839 };
8840 struct rpc_task_setup task_setup_data = {
8841 .task = &data->task,
8842 .rpc_client = NFS_CLIENT(data->args.inode),
8843 .rpc_message = &msg,
8844 .callback_ops = &nfs4_layoutcommit_ops,
8845 .callback_data = data,
863a3c6c
AA		 8846 };
8847 struct rpc_task *task;
8848 int status = 0;
8849
b4839ebe
KM		 8850 dprintk("NFS: initiating layoutcommit call. sync %d "
8851 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8852 data->args.lastbytewritten,
8853 data->args.inode->i_ino);
8854
472e2594
TM		 8855 if (!sync) {
8856 data->inode = nfs_igrab_and_active(data->args.inode);
8857 if (data->inode == NULL) {
8858 nfs4_layoutcommit_release(data);
8859 return -EAGAIN;
8860 }
8861 task_setup_data.flags = RPC_TASK_ASYNC;
8862 }
a9c92d6b 8863 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8864 task = rpc_run_task(&task_setup_data);
8865 if (IS_ERR(task))
8866 return PTR_ERR(task);
472e2594
TM		 8867 if (sync)
8868 status = task->tk_status;
48c9579a 8869 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
863a3c6c
AA		 8870 dprintk("%s: status %d\n", __func__, status);
8871 rpc_put_task(task);
8872 return status;
8873}
fca78d6d 8874
97431204
AA		 8875/**
8876 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8877 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8878 */
fca78d6d
BS		 8879static int
8880_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8881 struct nfs_fsinfo *info,
8882 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8883{
8884 struct nfs41_secinfo_no_name_args args = {
8885 .style = SECINFO_STYLE_CURRENT_FH,
8886 };
8887 struct nfs4_secinfo_res res = {
8888 .flavors = flavors,
8889 };
8890 struct rpc_message msg = {
8891 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8892 .rpc_argp = &args,
8893 .rpc_resp = &res,
8894 };
b1b3e136 8895 struct rpc_clnt *clnt = server->client;
7cb852df 8896 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8897 int status;
8898
8899 if (use_integrity) {
8900 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8901 cred = nfs4_get_clid_cred(server->nfs_client);
8902 msg.rpc_cred = cred;
b1b3e136
WAA		 8903 }
8904
8905 dprintk("--> %s\n", __func__);
8906 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8907 &res.seq_res, 0);
8908 dprintk("<-- %s status=%d\n", __func__, status);
8909
7cb852df
WAA		 8910 if (cred)
8911 put_rpccred(cred);
b1b3e136
WAA		 8912
8913 return status;
fca78d6d
BS		 8914}
8915
8916static int
8917nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8918 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8919{
8920 struct nfs4_exception exception = { };
8921 int err;
8922 do {
b1b3e136
WAA		 8923 /* first try using integrity protection */
8924 err = -NFS4ERR_WRONGSEC;
8925
8926 /* try to use integrity protection with machine cred */
8927 if (_nfs4_is_integrity_protected(server->nfs_client))
8928 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8929 flavors, true);
8930
8931 /*
8932 * if unable to use integrity protection, or SECINFO with
8933 * integrity protection returns NFS4ERR_WRONGSEC (which is
8934 * disallowed by spec, but exists in deployed servers) use
8935 * the current filesystem's rpc_client and the user cred.
8936 */
8937 if (err == -NFS4ERR_WRONGSEC)
8938 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8939 flavors, false);
8940
fca78d6d
BS		 8941 switch (err) {
8942 case 0:
8943 case -NFS4ERR_WRONGSEC:
78b19bae 8944 case -ENOTSUPP:
05e9cfb4 8945 goto out;
fca78d6d
BS		 8946 default:
8947 err = nfs4_handle_exception(server, err, &exception);
8948 }
8949 } while (exception.retry);
05e9cfb4 8950out:
fca78d6d
BS		 8951 return err;
8952}
8953
8954static int
8955nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8956 struct nfs_fsinfo *info)
8957{
8958 int err;
8959 struct page *page;
367156d9 8960 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8961 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8962 struct nfs4_secinfo4 *secinfo;
8963 int i;
fca78d6d
BS		 8964
8965 page = alloc_page(GFP_KERNEL);
8966 if (!page) {
8967 err = -ENOMEM;
8968 goto out;
8969 }
8970
8971 flavors = page_address(page);
8972 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8973
8974 /*
8975 * Fall back on "guess and check" method if
8976 * the server doesn't support SECINFO_NO_NAME
8977 */
78b19bae 8978 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8979 err = nfs4_find_root_sec(server, fhandle, info);
8980 goto out_freepage;
8981 }
8982 if (err)
8983 goto out_freepage;
8984
58a8cf12
WAA		 8985 for (i = 0; i < flavors->num_flavors; i++) {
8986 secinfo = &flavors->flavors[i];
8987
8988 switch (secinfo->flavor) {
8989 case RPC_AUTH_NULL:
8990 case RPC_AUTH_UNIX:
8991 case RPC_AUTH_GSS:
8992 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8993 &secinfo->flavor_info);
8994 break;
8995 default:
8996 flavor = RPC_AUTH_MAXFLAVOR;
8997 break;
8998 }
8999
4d4b69dd
WAA		 9000 if (!nfs_auth_info_match(&server->auth_info, flavor))
9001 flavor = RPC_AUTH_MAXFLAVOR;
9002
58a8cf12
WAA		 9003 if (flavor != RPC_AUTH_MAXFLAVOR) {
9004 err = nfs4_lookup_root_sec(server, fhandle,
9005 info, flavor);
9006 if (!err)
9007 break;
9008 }
9009 }
9010
9011 if (flavor == RPC_AUTH_MAXFLAVOR)
9012 err = -EPERM;
fca78d6d
BS		 9013
9014out_freepage:
9015 put_page(page);
9016 if (err == -EACCES)
9017 return -EPERM;
9018out:
9019 return err;
9020}
1cab0652 9021
ab7cb0df
TM		 9022static int _nfs41_test_stateid(struct nfs_server *server,
9023 nfs4_stateid *stateid,
9024 struct rpc_cred *cred)
7d974794
BS		 9025{
9026 int status;
9027 struct nfs41_test_stateid_args args = {
1cab0652 9028 .stateid = stateid,
7d974794
BS		 9029 };
9030 struct nfs41_test_stateid_res res;
9031 struct rpc_message msg = {
9032 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
9033 .rpc_argp = &args,
9034 .rpc_resp = &res,
ab7cb0df 9035 .rpc_cred = cred,
7d974794 9036 };
3787d506
WAA		 9037 struct rpc_clnt *rpc_client = server->client;
9038
9039 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9040 &rpc_client, &msg);
1cab0652 9041
38527b15 9042 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 9043 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 9044 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 9045 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 9046 &args.seq_args, &res.seq_res);
38527b15
CL		 9047 if (status != NFS_OK) {
9048 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 9049 return status;
38527b15
CL		 9050 }
9051 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 9052 return -res.status;
7d974794
BS		 9053}
9054
43912bbb
TM		 9055static void nfs4_handle_delay_or_session_error(struct nfs_server *server,
9056 int err, struct nfs4_exception *exception)
9057{
9058 exception->retry = 0;
9059 switch(err) {
9060 case -NFS4ERR_DELAY:
76e8a1bd 9061 case -NFS4ERR_RETRY_UNCACHED_REP:
43912bbb
TM		 9062 nfs4_handle_exception(server, err, exception);
9063 break;
9064 case -NFS4ERR_BADSESSION:
9065 case -NFS4ERR_BADSLOT:
9066 case -NFS4ERR_BAD_HIGH_SLOT:
9067 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
9068 case -NFS4ERR_DEADSESSION:
9069 nfs4_do_handle_exception(server, err, exception);
9070 }
9071}
9072
38527b15
CL		 9073/**
9074 * nfs41_test_stateid - perform a TEST_STATEID operation
9075 *
9076 * @server: server / transport on which to perform the operation
9077 * @stateid: state ID to test
ab7cb0df 9078 * @cred: credential
38527b15
CL		 9079 *
9080 * Returns NFS_OK if the server recognizes that "stateid" is valid.
9081 * Otherwise a negative NFS4ERR value is returned if the operation
9082 * failed or the state ID is not currently valid.
9083 */
ab7cb0df
TM		 9084static int nfs41_test_stateid(struct nfs_server *server,
9085 nfs4_stateid *stateid,
9086 struct rpc_cred *cred)
7d974794
BS		 9087{
9088 struct nfs4_exception exception = { };
9089 int err;
9090 do {
ab7cb0df 9091 err = _nfs41_test_stateid(server, stateid, cred);
43912bbb 9092 nfs4_handle_delay_or_session_error(server, err, &exception);
7d974794
BS		 9093 } while (exception.retry);
9094 return err;
9095}
9aeda35f 9096
7c1d5fae
TM		 9097struct nfs_free_stateid_data {
9098 struct nfs_server *server;
9099 struct nfs41_free_stateid_args args;
9aeda35f 9100 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 9101};
9102
9103static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
9104{
9105 struct nfs_free_stateid_data *data = calldata;
9106 nfs41_setup_sequence(nfs4_get_session(data->server),
9107 &data->args.seq_args,
9108 &data->res.seq_res,
9109 task);
9110}
9111
9112static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
9113{
9114 struct nfs_free_stateid_data *data = calldata;
9115
9116 nfs41_sequence_done(task, &data->res.seq_res);
9117
9118 switch (task->tk_status) {
9119 case -NFS4ERR_DELAY:
8478eaa1 9120 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 9121 rpc_restart_call_prepare(task);
9122 }
9123}
9124
9125static void nfs41_free_stateid_release(void *calldata)
9126{
9127 kfree(calldata);
9128}
9129
17f26b12 9130static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 9131 .rpc_call_prepare = nfs41_free_stateid_prepare,
9132 .rpc_call_done = nfs41_free_stateid_done,
9133 .rpc_release = nfs41_free_stateid_release,
9134};
9135
9136static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
f0b0bf88 9137 const nfs4_stateid *stateid,
ab7cb0df 9138 struct rpc_cred *cred,
7c1d5fae
TM		 9139 bool privileged)
9140{
9aeda35f
BS		 9141 struct rpc_message msg = {
9142 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 9143 .rpc_cred = cred,
9aeda35f 9144 };
7c1d5fae
TM		 9145 struct rpc_task_setup task_setup = {
9146 .rpc_client = server->client,
9147 .rpc_message = &msg,
9148 .callback_ops = &nfs41_free_stateid_ops,
9149 .flags = RPC_TASK_ASYNC,
9150 };
9151 struct nfs_free_stateid_data *data;
9aeda35f 9152
3787d506
WAA		 9153 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9154 &task_setup.rpc_client, &msg);
9155
38527b15 9156 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 9157 data = kmalloc(sizeof(*data), GFP_NOFS);
9158 if (!data)
9159 return ERR_PTR(-ENOMEM);
9160 data->server = server;
9161 nfs4_stateid_copy(&data->args.stateid, stateid);
9162
9163 task_setup.callback_data = data;
9164
9165 msg.rpc_argp = &data->args;
9166 msg.rpc_resp = &data->res;
76e8a1bd 9167 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
7c1d5fae
TM		 9168 if (privileged)
9169 nfs4_set_sequence_privileged(&data->args.seq_args);
9170
9171 return rpc_run_task(&task_setup);
9aeda35f
BS		 9172}
9173
38527b15
CL		 9174/**
9175 * nfs41_free_stateid - perform a FREE_STATEID operation
9176 *
9177 * @server: server / transport on which to perform the operation
9178 * @stateid: state ID to release
ab7cb0df 9179 * @cred: credential
f0b0bf88 9180 * @is_recovery: set to true if this call needs to be privileged
38527b15 9181 *
f0b0bf88 9182 * Note: this function is always asynchronous.
38527b15 9183 */
ab7cb0df 9184static int nfs41_free_stateid(struct nfs_server *server,
f0b0bf88
TM		 9185 const nfs4_stateid *stateid,
9186 struct rpc_cred *cred,
9187 bool is_recovery)
9aeda35f 9188{
7c1d5fae 9189 struct rpc_task *task;
7c1d5fae 9190
f0b0bf88 9191 task = _nfs41_free_stateid(server, stateid, cred, is_recovery);
7c1d5fae
TM		 9192 if (IS_ERR(task))
9193 return PTR_ERR(task);
7c1d5fae 9194 rpc_put_task(task);
f0b0bf88 9195 return 0;
9aeda35f 9196}
36281caa 9197
f1cdae87
JL		 9198static void
9199nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf 9200{
ab7cb0df 9201 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 9202
f0b0bf88 9203 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf 9204 nfs4_free_lock_state(server, lsp);
c8b2d0bf
TM		 9205}
9206
36281caa
TM		 9207static bool nfs41_match_stateid(const nfs4_stateid *s1,
9208 const nfs4_stateid *s2)
9209{
93b717fd
TM		 9210 if (s1->type != s2->type)
9211 return false;
9212
2d2f24ad 9213 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 9214 return false;
9215
2d2f24ad 9216 if (s1->seqid == s2->seqid)
36281caa 9217 return true;
2d2f24ad 9218 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 9219 return true;
9220
9221 return false;
9222}
9223
557134a3
AA		 9224#endif /* CONFIG_NFS_V4_1 */
9225
36281caa
TM		 9226static bool nfs4_match_stateid(const nfs4_stateid *s1,
9227 const nfs4_stateid *s2)
9228{
f597c537 9229 return nfs4_stateid_match(s1, s2);
36281caa
TM		 9230}
9231
9232
17280175 9233static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 9234 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 9235 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 9236 .recover_open = nfs4_open_reclaim,
9237 .recover_lock = nfs4_lock_reclaim,
591d71cb 9238 .establish_clid = nfs4_init_clientid,
05f4c350 9239 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 9240};
9241
591d71cb 9242#if defined(CONFIG_NFS_V4_1)
17280175 9243static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 9244 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9245 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9246 .recover_open = nfs4_open_reclaim,
9247 .recover_lock = nfs4_lock_reclaim,
4d643d1d 9248 .establish_clid = nfs41_init_clientid,
fce5c838 9249 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 9250 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 9251};
9252#endif /* CONFIG_NFS_V4_1 */
9253
17280175 9254static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 9255 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9256 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 9257 .recover_open = nfs40_open_expired,
591d71cb
AA		 9258 .recover_lock = nfs4_lock_expired,
9259 .establish_clid = nfs4_init_clientid,
9260};
9261
9262#if defined(CONFIG_NFS_V4_1)
17280175 9263static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 9264 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 9265 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 9266 .recover_open = nfs41_open_expired,
9267 .recover_lock = nfs41_lock_expired,
4d643d1d 9268 .establish_clid = nfs41_init_clientid,
1da177e4 9269};
591d71cb 9270#endif /* CONFIG_NFS_V4_1 */
1da177e4 9271
17280175 9272static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 9273 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 9274 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 9275 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 9276};
9277
9278#if defined(CONFIG_NFS_V4_1)
17280175 9279static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 9280 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 9281 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 9282 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 9283};
9284#endif
9285
ec011fe8 9286static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 9287 .get_locations = _nfs40_proc_get_locations,
44c99933 9288 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 9289};
9290
9291#if defined(CONFIG_NFS_V4_1)
9292static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 9293 .get_locations = _nfs41_proc_get_locations,
44c99933 9294 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 9295};
9296#endif /* CONFIG_NFS_V4_1 */
9297
97dc1359
TM		 9298static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
9299 .minor_version = 0,
39c6daae
TM		 9300 .init_caps = NFS_CAP_READDIRPLUS
9301 | NFS_CAP_ATOMIC_OPEN
39c6daae 9302 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 9303 .init_client = nfs40_init_client,
9304 .shutdown_client = nfs40_shutdown_client,
36281caa 9305 .match_stateid = nfs4_match_stateid,
fca78d6d 9306 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 9307 .free_lock_state = nfs4_release_lockowner,
45870d69 9308 .test_and_free_expired = nfs40_test_and_free_expired_stateid,
63f5f796 9309 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 9310 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 9311 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
9312 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
9313 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 9314 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 9315};
9316
9317#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 9318static struct nfs_seqid *
9319nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
9320{
9321 return NULL;
9322}
9323
97dc1359
TM		 9324static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
9325 .minor_version = 1,
39c6daae
TM		 9326 .init_caps = NFS_CAP_READDIRPLUS
9327 | NFS_CAP_ATOMIC_OPEN
3b66486c 9328 | NFS_CAP_POSIX_LOCK
49f9a0fa 9329 | NFS_CAP_STATEID_NFSV41
e983120e 9330 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 9331 .init_client = nfs41_init_client,
9332 .shutdown_client = nfs41_shutdown_client,
36281caa 9333 .match_stateid = nfs41_match_stateid,
fca78d6d 9334 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 9335 .free_lock_state = nfs41_free_lock_state,
45870d69 9336 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 9337 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 9338 .session_trunk = nfs4_test_session_trunk,
9915ea7e 9339 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 9340 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9341 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9342 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 9343 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 9344};
9345#endif
9346
42c2c424
SD		 9347#if defined(CONFIG_NFS_V4_2)
9348static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
9349 .minor_version = 2,
7017310a
BS		 9350 .init_caps = NFS_CAP_READDIRPLUS
9351 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 9352 | NFS_CAP_POSIX_LOCK
9353 | NFS_CAP_STATEID_NFSV41
e983120e 9354 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 9355 | NFS_CAP_ALLOCATE
2e72448b 9356 | NFS_CAP_COPY
624bd5b7 9357 | NFS_CAP_DEALLOCATE
6c5a0d89 9358 | NFS_CAP_SEEK
e5341f3a
PT		 9359 | NFS_CAP_LAYOUTSTATS
9360 | NFS_CAP_CLONE,
abf79bb3
CL		 9361 .init_client = nfs41_init_client,
9362 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 9363 .match_stateid = nfs41_match_stateid,
9364 .find_root_sec = nfs41_find_root_sec,
7017310a 9365 .free_lock_state = nfs41_free_lock_state,
9915ea7e 9366 .call_sync_ops = &nfs41_call_sync_ops,
45870d69 9367 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 9368 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 9369 .session_trunk = nfs4_test_session_trunk,
42c2c424
SD		 9370 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9371 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9372 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 9373 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 9374};
9375#endif
9376
97dc1359
TM		 9377const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
9378 [0] = &nfs_v4_0_minor_ops,
9379#if defined(CONFIG_NFS_V4_1)
9380 [1] = &nfs_v4_1_minor_ops,
9381#endif
42c2c424
SD		 9382#if defined(CONFIG_NFS_V4_2)
9383 [2] = &nfs_v4_2_minor_ops,
9384#endif
97dc1359
TM		 9385};
9386
13997823 9387static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
c4803c49
AG		 9388{
9389 ssize_t error, error2;
9390
9391 error = generic_listxattr(dentry, list, size);
9392 if (error < 0)
9393 return error;
9394 if (list) {
9395 list += error;
9396 size -= error;
9397 }
9398
9399 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
9400 if (error2 < 0)
9401 return error2;
9402 return error + error2;
9403}
9404
17f26b12 9405static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 9406 .create = nfs_create,
9407 .lookup = nfs_lookup,
9408 .atomic_open = nfs_atomic_open,
9409 .link = nfs_link,
9410 .unlink = nfs_unlink,
9411 .symlink = nfs_symlink,
9412 .mkdir = nfs_mkdir,
9413 .rmdir = nfs_rmdir,
9414 .mknod = nfs_mknod,
9415 .rename = nfs_rename,
9416 .permission = nfs_permission,
9417 .getattr = nfs_getattr,
9418 .setattr = nfs_setattr,
c4803c49 9419 .listxattr = nfs4_listxattr,
73a79706
BS		 9420};
9421
92e1d5be 9422static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 9423 .permission = nfs_permission,
9424 .getattr = nfs_getattr,
9425 .setattr = nfs_setattr,
c4803c49 9426 .listxattr = nfs4_listxattr,
6b3b5496
BF		 9427};
9428
509de811 9429const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 9430 .version = 4, /* protocol version */
9431 .dentry_ops = &nfs4_dentry_operations,
9432 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 9433 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 9434 .file_ops = &nfs4_file_operations,
1da177e4 9435 .getroot = nfs4_proc_get_root,
281cad46 9436 .submount = nfs4_submount,
ff9099f2 9437 .try_mount = nfs4_try_mount,
1da177e4
LT		 9438 .getattr = nfs4_proc_getattr,
9439 .setattr = nfs4_proc_setattr,
9440 .lookup = nfs4_proc_lookup,
9441 .access = nfs4_proc_access,
9442 .readlink = nfs4_proc_readlink,
1da177e4
LT		 9443 .create = nfs4_proc_create,
9444 .remove = nfs4_proc_remove,
9445 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 9446 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 9447 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 9448 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 9449 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 9450 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 9451 .link = nfs4_proc_link,
9452 .symlink = nfs4_proc_symlink,
9453 .mkdir = nfs4_proc_mkdir,
9454 .rmdir = nfs4_proc_remove,
9455 .readdir = nfs4_proc_readdir,
9456 .mknod = nfs4_proc_mknod,
9457 .statfs = nfs4_proc_statfs,
9458 .fsinfo = nfs4_proc_fsinfo,
9459 .pathconf = nfs4_proc_pathconf,
e9326dca 9460 .set_capabilities = nfs4_server_capabilities,
1da177e4 9461 .decode_dirent = nfs4_decode_dirent,
a4cdda59 9462 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 9463 .read_setup = nfs4_proc_read_setup,
ec06c096 9464 .read_done = nfs4_read_done,
1da177e4 9465 .write_setup = nfs4_proc_write_setup,
788e7a89 9466 .write_done = nfs4_write_done,
1da177e4 9467 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 9468 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 9469 .commit_done = nfs4_commit_done,
1da177e4 9470 .lock = nfs4_proc_lock,
e50a1c2e 9471 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 9472 .close_context = nfs4_close_context,
2b484297 9473 .open_context = nfs4_atomic_open,
011e2a7f 9474 .have_delegation = nfs4_have_delegation,
57ec14c5 9475 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 9476 .alloc_client = nfs4_alloc_client,
45a52a02 9477 .init_client = nfs4_init_client,
cdb7eced 9478 .free_client = nfs4_free_client,
1179acc6
BS		 9479 .create_server = nfs4_create_server,
9480 .clone_server = nfs_clone_server,
1da177e4
LT		 9481};
9482
64c2ce8b 9483static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
98e9cb57 9484 .name = XATTR_NAME_NFSV4_ACL,
64c2ce8b
AK		 9485 .list = nfs4_xattr_list_nfs4_acl,
9486 .get = nfs4_xattr_get_nfs4_acl,
9487 .set = nfs4_xattr_set_nfs4_acl,
9488};
9489
9490const struct xattr_handler *nfs4_xattr_handlers[] = {
9491 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 9492#ifdef CONFIG_NFS_V4_SECURITY_LABEL
9493 &nfs4_xattr_nfs4_label_handler,
9494#endif
64c2ce8b
AK		 9495 NULL
9496};
9497
1da177e4
LT		 9498/*
9499 * Local variables:
9500 * c-basic-offset: 8
9501 * End:
9502 */
Linux 6.x block layer and io_uring tree(s)