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pNFS/flexfiles: Fix ff_layout_add_ds_error_locked()
[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;
a9a4a87a 1092 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 1093 nfs_force_lookup_revalidate(dir);
a9a4a87a 1094 dir->i_version = cinfo->after;
3235b403 1095 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
de242c0b 1096 nfs_fscache_invalidate(dir);
38478b24 1097 spin_unlock(&dir->i_lock);
1da177e4
LT		 1098}
1099
e56e0b78 1100struct nfs4_opendata {
c6d00e63 1101 struct kref kref;
e56e0b78
TM		 1102 struct nfs_openargs o_arg;
1103 struct nfs_openres o_res;
cdd4e68b
TM		 1104 struct nfs_open_confirmargs c_arg;
1105 struct nfs_open_confirmres c_res;
6926afd1
TM		 1106 struct nfs4_string owner_name;
1107 struct nfs4_string group_name;
a49c2691 1108 struct nfs4_label *a_label;
e56e0b78 1109 struct nfs_fattr f_attr;
1775fd3e 1110 struct nfs4_label *f_label;
e56e0b78 1111 struct dentry *dir;
82a2c1b7 1112 struct dentry *dentry;
e56e0b78 1113 struct nfs4_state_owner *owner;
aac00a8d 1114 struct nfs4_state *state;
e56e0b78 1115 struct iattr attrs;
26e976a8 1116 unsigned long timestamp;
3e309914 1117 unsigned int rpc_done : 1;
5bc2afc2 1118 unsigned int file_created : 1;
bdeca1b7 1119 unsigned int is_recover : 1;
24ac23ab
TM		 1120 int rpc_status;
1121 int cancelled;
e56e0b78
TM		 1122};
1123
49f9a0fa
TM		 1124static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1125 int err, struct nfs4_exception *exception)
1126{
1127 if (err != -EINVAL)
1128 return false;
1129 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1130 return false;
1131 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1132 exception->retry = 1;
1133 return true;
1134}
1135
6ae37339
TM		 1136static u32
1137nfs4_map_atomic_open_share(struct nfs_server *server,
1138 fmode_t fmode, int openflags)
1139{
1140 u32 res = 0;
1141
1142 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1143 case FMODE_READ:
1144 res = NFS4_SHARE_ACCESS_READ;
1145 break;
1146 case FMODE_WRITE:
1147 res = NFS4_SHARE_ACCESS_WRITE;
1148 break;
1149 case FMODE_READ|FMODE_WRITE:
1150 res = NFS4_SHARE_ACCESS_BOTH;
1151 }
1152 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1153 goto out;
1154 /* Want no delegation if we're using O_DIRECT */
1155 if (openflags & O_DIRECT)
1156 res |= NFS4_SHARE_WANT_NO_DELEG;
1157out:
1158 return res;
1159}
1160
49f9a0fa
TM		 1161static enum open_claim_type4
1162nfs4_map_atomic_open_claim(struct nfs_server *server,
1163 enum open_claim_type4 claim)
1164{
1165 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1166 return claim;
1167 switch (claim) {
1168 default:
1169 return claim;
1170 case NFS4_OPEN_CLAIM_FH:
1171 return NFS4_OPEN_CLAIM_NULL;
1172 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1173 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1174 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1175 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1176 }
1177}
2ced46c2
TM		 1178
1179static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1180{
1181 p->o_res.f_attr = &p->f_attr;
1775fd3e 1182 p->o_res.f_label = p->f_label;
c1d51931
TM		 1183 p->o_res.seqid = p->o_arg.seqid;
1184 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 1185 p->o_res.server = p->o_arg.server;
5f657530 1186 p->o_res.access_request = p->o_arg.access;
2ced46c2 1187 nfs_fattr_init(&p->f_attr);
6926afd1 1188 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 1189}
1190
82a2c1b7 1191static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 1192 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 1193 const struct iattr *attrs,
1775fd3e 1194 struct nfs4_label *label,
4a1c0893 1195 enum open_claim_type4 claim,
8535b2be 1196 gfp_t gfp_mask)
e56e0b78 1197{
82a2c1b7 1198 struct dentry *parent = dget_parent(dentry);
2b0143b5 1199 struct inode *dir = d_inode(parent);
e56e0b78 1200 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1201 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 1202 struct nfs4_opendata *p;
1203
8535b2be 1204 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1205 if (p == NULL)
1206 goto err;
14c43f76
DQ		 1207
1208 p->f_label = nfs4_label_alloc(server, gfp_mask);
1209 if (IS_ERR(p->f_label))
1210 goto err_free_p;
1211
a49c2691
KM		 1212 p->a_label = nfs4_label_alloc(server, gfp_mask);
1213 if (IS_ERR(p->a_label))
1214 goto err_free_f;
1215
63f5f796
TM		 1216 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1217 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1218 if (IS_ERR(p->o_arg.seqid))
14c43f76 1219 goto err_free_label;
82a2c1b7
AV		 1220 nfs_sb_active(dentry->d_sb);
1221 p->dentry = dget(dentry);
e56e0b78
TM		 1222 p->dir = parent;
1223 p->owner = sp;
1224 atomic_inc(&sp->so_count);
dc0b027d
TM		 1225 p->o_arg.open_flags = flags;
1226 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
536585cc 1227 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
6ae37339
TM		 1228 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1229 fmode, flags);
ae2bb032
WAA		 1230 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1231 * will return permission denied for all bits until close */
1232 if (!(flags & O_EXCL)) {
1233 /* ask server to check for all possible rights as results
1234 * are cached */
536585cc
TM		 1235 switch (p->o_arg.claim) {
1236 default:
1237 break;
1238 case NFS4_OPEN_CLAIM_NULL:
1239 case NFS4_OPEN_CLAIM_FH:
1240 p->o_arg.access = NFS4_ACCESS_READ |
1241 NFS4_ACCESS_MODIFY |
1242 NFS4_ACCESS_EXTEND |
1243 NFS4_ACCESS_EXECUTE;
1244 }
ae2bb032 1245 }
7539bbab 1246 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1247 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1248 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1249 p->o_arg.name = &dentry->d_name;
e56e0b78 1250 p->o_arg.server = server;
aa9c2669 1251 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1252 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
a49c2691 1253 p->o_arg.label = nfs4_label_copy(p->a_label, label);
49f9a0fa 1254 switch (p->o_arg.claim) {
4a1c0893
TM		 1255 case NFS4_OPEN_CLAIM_NULL:
1256 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1257 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1258 p->o_arg.fh = NFS_FH(dir);
1259 break;
1260 case NFS4_OPEN_CLAIM_PREVIOUS:
1261 case NFS4_OPEN_CLAIM_FH:
1262 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1263 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1264 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1265 }
536e43d1 1266 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1267 __u32 verf[2];
d77d76ff 1268
e56e0b78
TM		 1269 p->o_arg.u.attrs = &p->attrs;
1270 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1271
1272 verf[0] = jiffies;
1273 verf[1] = current->pid;
1274 memcpy(p->o_arg.u.verifier.data, verf,
1275 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1276 }
cdd4e68b
TM		 1277 p->c_arg.fh = &p->o_res.fh;
1278 p->c_arg.stateid = &p->o_res.stateid;
1279 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1280 nfs4_init_opendata_res(p);
c6d00e63 1281 kref_init(&p->kref);
e56e0b78 1282 return p;
14c43f76
DQ		 1283
1284err_free_label:
a49c2691
KM		 1285 nfs4_label_free(p->a_label);
1286err_free_f:
14c43f76
DQ		 1287 nfs4_label_free(p->f_label);
1288err_free_p:
e56e0b78
TM		 1289 kfree(p);
1290err:
1291 dput(parent);
1292 return NULL;
1293}
1294
c6d00e63 1295static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1296{
c6d00e63
TM		 1297 struct nfs4_opendata *p = container_of(kref,
1298 struct nfs4_opendata, kref);
82a2c1b7 1299 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1300
1301 nfs_free_seqid(p->o_arg.seqid);
2e80dbe7 1302 nfs4_sequence_free_slot(&p->o_res.seq_res);
aac00a8d
TM		 1303 if (p->state != NULL)
1304 nfs4_put_open_state(p->state);
c6d00e63 1305 nfs4_put_state_owner(p->owner);
14c43f76 1306
a49c2691 1307 nfs4_label_free(p->a_label);
14c43f76
DQ		 1308 nfs4_label_free(p->f_label);
1309
c6d00e63 1310 dput(p->dir);
82a2c1b7
AV		 1311 dput(p->dentry);
1312 nfs_sb_deactive(sb);
6926afd1 1313 nfs_fattr_free_names(&p->f_attr);
e911b815 1314 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1315 kfree(p);
1316}
1317
1318static void nfs4_opendata_put(struct nfs4_opendata *p)
1319{
1320 if (p != NULL)
1321 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1322}
1323
06f814a3
TM		 1324static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1325{
06f814a3
TM		 1326 int ret;
1327
06f814a3 1328 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1329 return ret;
1330}
1331
24311f88
TM		 1332static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1333 fmode_t fmode)
1334{
1335 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1336 case FMODE_READ|FMODE_WRITE:
1337 return state->n_rdwr != 0;
1338 case FMODE_WRITE:
1339 return state->n_wronly != 0;
1340 case FMODE_READ:
1341 return state->n_rdonly != 0;
1342 }
1343 WARN_ON_ONCE(1);
1344 return false;
1345}
1346
dc0b027d 1347static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1348{
1349 int ret = 0;
dc0b027d 1350
536e43d1 1351 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1352 goto out;
1353 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1354 case FMODE_READ:
88069f77
TM		 1355 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1356 && state->n_rdonly != 0;
6ee41268
TM		 1357 break;
1358 case FMODE_WRITE:
88069f77
TM		 1359 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1360 && state->n_wronly != 0;
6ee41268
TM		 1361 break;
1362 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1363 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1364 && state->n_rdwr != 0;
6ee41268 1365 }
dc0b027d 1366out:
6ee41268
TM		 1367 return ret;
1368}
1369
2a606188
TM		 1370static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1371 enum open_claim_type4 claim)
aac00a8d 1372{
652f89f6
TM		 1373 if (delegation == NULL)
1374 return 0;
dc0b027d 1375 if ((delegation->type & fmode) != fmode)
aac00a8d 1376 return 0;
d25be546
TM		 1377 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1378 return 0;
2a606188
TM		 1379 switch (claim) {
1380 case NFS4_OPEN_CLAIM_NULL:
1381 case NFS4_OPEN_CLAIM_FH:
1382 break;
1383 case NFS4_OPEN_CLAIM_PREVIOUS:
1384 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1385 break;
1386 default:
1387 return 0;
1388 }
b7391f44 1389 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1390 return 1;
1391}
1392
dc0b027d 1393static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1394{
dc0b027d 1395 switch (fmode) {
e7616923
TM		 1396 case FMODE_WRITE:
1397 state->n_wronly++;
1398 break;
1399 case FMODE_READ:
1400 state->n_rdonly++;
1401 break;
1402 case FMODE_READ|FMODE_WRITE:
1403 state->n_rdwr++;
1404 }
dc0b027d 1405 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1406}
1407
8a64c4ef
TM		 1408#ifdef CONFIG_NFS_V4_1
1409static bool nfs_open_stateid_recover_openmode(struct nfs4_state *state)
1410{
1411 if (state->n_rdonly && !test_bit(NFS_O_RDONLY_STATE, &state->flags))
1412 return true;
1413 if (state->n_wronly && !test_bit(NFS_O_WRONLY_STATE, &state->flags))
1414 return true;
1415 if (state->n_rdwr && !test_bit(NFS_O_RDWR_STATE, &state->flags))
1416 return true;
1417 return false;
1418}
1419#endif /* CONFIG_NFS_V4_1 */
1420
4f14c194
TM		 1421static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1422{
1423 struct nfs_client *clp = state->owner->so_server->nfs_client;
1424 bool need_recover = false;
1425
1426 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1427 need_recover = true;
1428 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1429 need_recover = true;
1430 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1431 need_recover = true;
1432 if (need_recover)
1433 nfs4_state_mark_reclaim_nograce(clp, state);
1434}
1435
e999e80e 1436static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1393d961 1437 const nfs4_stateid *stateid, nfs4_stateid *freeme)
e999e80e
TM		 1438{
1439 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1440 return true;
4f14c194 1441 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1393d961 1442 nfs4_stateid_copy(freeme, &state->open_stateid);
4f14c194 1443 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1444 return true;
4f14c194 1445 }
e999e80e
TM		 1446 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1447 return true;
1448 return false;
1449}
1450
f95549cf
TM		 1451static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1452{
3c38cbe2
TM		 1453 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1454 return;
f95549cf
TM		 1455 if (state->n_wronly)
1456 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1457 if (state->n_rdonly)
1458 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1459 if (state->n_rdwr)
1460 set_bit(NFS_O_RDWR_STATE, &state->flags);
3c38cbe2 1461 set_bit(NFS_OPEN_STATE, &state->flags);
f95549cf
TM		 1462}
1463
226056c5
TM		 1464static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1465 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1466{
226056c5
TM		 1467 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1468 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1469 case FMODE_WRITE:
1470 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1471 break;
1472 case FMODE_READ:
1473 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1474 break;
1475 case 0:
1476 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1477 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1478 clear_bit(NFS_OPEN_STATE, &state->flags);
1479 }
1480 if (stateid == NULL)
1481 return;
3e7dfb16
TM		 1482 /* Handle OPEN+OPEN_DOWNGRADE races */
1483 if (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1484 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
f95549cf 1485 nfs_resync_open_stateid_locked(state);
226056c5 1486 return;
f95549cf 1487 }
003707c7 1488 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1489 nfs4_stateid_copy(&state->stateid, stateid);
1490 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1491}
1492
4a1e2feb
TM		 1493static void nfs_clear_open_stateid(struct nfs4_state *state,
1494 nfs4_stateid *arg_stateid,
1495 nfs4_stateid *stateid, fmode_t fmode)
226056c5
TM		 1496{
1497 write_seqlock(&state->seqlock);
3e7dfb16
TM		 1498 /* Ignore, if the CLOSE argment doesn't match the current stateid */
1499 if (nfs4_state_match_open_stateid_other(state, arg_stateid))
1500 nfs_clear_open_stateid_locked(state, stateid, fmode);
226056c5 1501 write_sequnlock(&state->seqlock);
4f14c194
TM		 1502 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1503 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1504}
1505
1393d961
TM		 1506static void nfs_set_open_stateid_locked(struct nfs4_state *state,
1507 const nfs4_stateid *stateid, fmode_t fmode,
1508 nfs4_stateid *freeme)
003707c7 1509{
dc0b027d 1510 switch (fmode) {
003707c7
TM		 1511 case FMODE_READ:
1512 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1513 break;
1514 case FMODE_WRITE:
1515 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1516 break;
1517 case FMODE_READ|FMODE_WRITE:
1518 set_bit(NFS_O_RDWR_STATE, &state->flags);
1519 }
1393d961 1520 if (!nfs_need_update_open_stateid(state, stateid, freeme))
e999e80e
TM		 1521 return;
1522 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1523 nfs4_stateid_copy(&state->stateid, stateid);
1524 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1525}
1526
1393d961
TM		 1527static void __update_open_stateid(struct nfs4_state *state,
1528 const nfs4_stateid *open_stateid,
1529 const nfs4_stateid *deleg_stateid,
1530 fmode_t fmode,
1531 nfs4_stateid *freeme)
1da177e4 1532{
8bda4e4c
TM		 1533 /*
1534 * Protect the call to nfs4_state_set_mode_locked and
1535 * serialise the stateid update
1536 */
361cad3c 1537 spin_lock(&state->owner->so_lock);
8bda4e4c 1538 write_seqlock(&state->seqlock);
003707c7 1539 if (deleg_stateid != NULL) {
f597c537 1540 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1541 set_bit(NFS_DELEGATED_STATE, &state->flags);
1542 }
1543 if (open_stateid != NULL)
1393d961 1544 nfs_set_open_stateid_locked(state, open_stateid, fmode, freeme);
8bda4e4c 1545 write_sequnlock(&state->seqlock);
dc0b027d 1546 update_open_stateflags(state, fmode);
ec073428 1547 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1548}
1549
1393d961
TM		 1550static int update_open_stateid(struct nfs4_state *state,
1551 const nfs4_stateid *open_stateid,
1552 const nfs4_stateid *delegation,
1553 fmode_t fmode)
34310430 1554{
1393d961
TM		 1555 struct nfs_server *server = NFS_SERVER(state->inode);
1556 struct nfs_client *clp = server->nfs_client;
34310430
TM		 1557 struct nfs_inode *nfsi = NFS_I(state->inode);
1558 struct nfs_delegation *deleg_cur;
83aa3e0f 1559 nfs4_stateid freeme = { };
34310430
TM		 1560 int ret = 0;
1561
dc0b027d 1562 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1563
1564 rcu_read_lock();
1565 deleg_cur = rcu_dereference(nfsi->delegation);
1566 if (deleg_cur == NULL)
1567 goto no_delegation;
1568
1569 spin_lock(&deleg_cur->lock);
17f26b12 1570 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1571 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1572 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1573 goto no_delegation_unlock;
1574
1575 if (delegation == NULL)
1576 delegation = &deleg_cur->stateid;
f597c537 1577 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1578 goto no_delegation_unlock;
1579
b7391f44 1580 nfs_mark_delegation_referenced(deleg_cur);
1393d961
TM		 1581 __update_open_stateid(state, open_stateid, &deleg_cur->stateid,
1582 fmode, &freeme);
34310430
TM		 1583 ret = 1;
1584no_delegation_unlock:
1585 spin_unlock(&deleg_cur->lock);
1586no_delegation:
1587 rcu_read_unlock();
1588
1589 if (!ret && open_stateid != NULL) {
1393d961 1590 __update_open_stateid(state, open_stateid, NULL, fmode, &freeme);
34310430
TM		 1591 ret = 1;
1592 }
4f14c194 1593 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1393d961
TM		 1594 nfs4_schedule_state_manager(clp);
1595 if (freeme.type != 0)
1596 nfs4_test_and_free_stateid(server, &freeme,
1597 state->owner->so_cred);
34310430
TM		 1598
1599 return ret;
1600}
1601
39071e6f
TM		 1602static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1603 const nfs4_stateid *stateid)
1604{
1605 struct nfs4_state *state = lsp->ls_state;
1606 bool ret = false;
1607
1608 spin_lock(&state->state_lock);
1609 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1610 goto out_noupdate;
1611 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1612 goto out_noupdate;
1613 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1614 ret = true;
1615out_noupdate:
1616 spin_unlock(&state->state_lock);
1617 return ret;
1618}
34310430 1619
dc0b027d 1620static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1621{
1622 struct nfs_delegation *delegation;
1623
1624 rcu_read_lock();
1625 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1626 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1627 rcu_read_unlock();
1628 return;
1629 }
1630 rcu_read_unlock();
57ec14c5 1631 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1632}
1633
6ee41268 1634static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1635{
1636 struct nfs4_state *state = opendata->state;
1637 struct nfs_inode *nfsi = NFS_I(state->inode);
1638 struct nfs_delegation *delegation;
f448badd 1639 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1640 fmode_t fmode = opendata->o_arg.fmode;
2a606188 1641 enum open_claim_type4 claim = opendata->o_arg.claim;
aac00a8d
TM		 1642 nfs4_stateid stateid;
1643 int ret = -EAGAIN;
1644
aac00a8d 1645 for (;;) {
61beef75 1646 spin_lock(&state->owner->so_lock);
dc0b027d 1647 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1648 update_open_stateflags(state, fmode);
6ee41268 1649 spin_unlock(&state->owner->so_lock);
61beef75 1650 goto out_return_state;
6ee41268 1651 }
61beef75 1652 spin_unlock(&state->owner->so_lock);
34310430
TM		 1653 rcu_read_lock();
1654 delegation = rcu_dereference(nfsi->delegation);
2a606188 1655 if (!can_open_delegated(delegation, fmode, claim)) {
34310430 1656 rcu_read_unlock();
aac00a8d 1657 break;
34310430 1658 }
aac00a8d 1659 /* Save the delegation */
f597c537 1660 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1661 rcu_read_unlock();
fa332941 1662 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1663 if (!opendata->is_recover) {
1664 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1665 if (ret != 0)
1666 goto out;
1667 }
aac00a8d 1668 ret = -EAGAIN;
34310430
TM		 1669
1670 /* Try to update the stateid using the delegation */
dc0b027d 1671 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1672 goto out_return_state;
aac00a8d 1673 }
aac00a8d
TM		 1674out:
1675 return ERR_PTR(ret);
1676out_return_state:
1677 atomic_inc(&state->count);
1678 return state;
1679}
1680
e23008ec
AA		 1681static void
1682nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1683{
1684 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1685 struct nfs_delegation *delegation;
1686 int delegation_flags = 0;
1687
1688 rcu_read_lock();
1689 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1690 if (delegation)
1691 delegation_flags = delegation->flags;
1692 rcu_read_unlock();
72d79ff8
TM		 1693 switch (data->o_arg.claim) {
1694 default:
1695 break;
1696 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1697 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
e23008ec
AA		 1698 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1699 "returning a delegation for "
1700 "OPEN(CLAIM_DELEGATE_CUR)\n",
1701 clp->cl_hostname);
72d79ff8
TM		 1702 return;
1703 }
1704 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
e23008ec
AA		 1705 nfs_inode_set_delegation(state->inode,
1706 data->owner->so_cred,
1707 &data->o_res);
1708 else
1709 nfs_inode_reclaim_delegation(state->inode,
1710 data->owner->so_cred,
1711 &data->o_res);
1712}
1713
1714/*
1715 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1716 * and update the nfs4_state.
1717 */
1718static struct nfs4_state *
1719_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1720{
1721 struct inode *inode = data->state->inode;
1722 struct nfs4_state *state = data->state;
1723 int ret;
1724
d2bfda2e
WAA		 1725 if (!data->rpc_done) {
1726 if (data->rpc_status) {
1727 ret = data->rpc_status;
1728 goto err;
1729 }
1730 /* cached opens have already been processed */
1731 goto update;
e23008ec
AA		 1732 }
1733
e23008ec
AA		 1734 ret = nfs_refresh_inode(inode, &data->f_attr);
1735 if (ret)
1736 goto err;
1737
1738 if (data->o_res.delegation_type != 0)
1739 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1740update:
e23008ec
AA		 1741 update_open_stateid(state, &data->o_res.stateid, NULL,
1742 data->o_arg.fmode);
d49f042a 1743 atomic_inc(&state->count);
e23008ec
AA		 1744
1745 return state;
1746err:
1747 return ERR_PTR(ret);
1748
1749}
1750
1751static struct nfs4_state *
1752_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1753{
1754 struct inode *inode;
1755 struct nfs4_state *state = NULL;
1b370bc2 1756 int ret;
24ac23ab 1757
aac00a8d 1758 if (!data->rpc_done) {
6ee41268 1759 state = nfs4_try_open_cached(data);
9759b0fb 1760 trace_nfs4_cached_open(data->state);
aac00a8d
TM		 1761 goto out;
1762 }
1763
1b370bc2 1764 ret = -EAGAIN;
24ac23ab 1765 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1766 goto err;
1775fd3e 1767 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1768 ret = PTR_ERR(inode);
03f28e3a 1769 if (IS_ERR(inode))
1b370bc2
TM		 1770 goto err;
1771 ret = -ENOMEM;
24ac23ab
TM		 1772 state = nfs4_get_open_state(inode, data->owner);
1773 if (state == NULL)
1b370bc2 1774 goto err_put_inode;
e23008ec
AA		 1775 if (data->o_res.delegation_type != 0)
1776 nfs4_opendata_check_deleg(data, state);
34310430 1777 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1778 data->o_arg.fmode);
24ac23ab 1779 iput(inode);
aac00a8d 1780out:
7aa262b5 1781 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1782 return state;
1b370bc2
TM		 1783err_put_inode:
1784 iput(inode);
1785err:
1786 return ERR_PTR(ret);
24ac23ab
TM		 1787}
1788
e23008ec
AA		 1789static struct nfs4_state *
1790nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1791{
2e80dbe7
TM		 1792 struct nfs4_state *ret;
1793
e23008ec 1794 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
2e80dbe7
TM		 1795 ret =_nfs4_opendata_reclaim_to_nfs4_state(data);
1796 else
1797 ret = _nfs4_opendata_to_nfs4_state(data);
1798 nfs4_sequence_free_slot(&data->o_res.seq_res);
1799 return ret;
e23008ec
AA		 1800}
1801
864472e9
TM		 1802static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1803{
1804 struct nfs_inode *nfsi = NFS_I(state->inode);
1805 struct nfs_open_context *ctx;
1806
1807 spin_lock(&state->inode->i_lock);
1808 list_for_each_entry(ctx, &nfsi->open_files, list) {
1809 if (ctx->state != state)
1810 continue;
1811 get_nfs_open_context(ctx);
1812 spin_unlock(&state->inode->i_lock);
1813 return ctx;
1814 }
1815 spin_unlock(&state->inode->i_lock);
1816 return ERR_PTR(-ENOENT);
1817}
1818
4a1c0893
TM		 1819static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1820 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1821{
1822 struct nfs4_opendata *opendata;
1823
4a1c0893 1824 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1825 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1826 if (opendata == NULL)
1827 return ERR_PTR(-ENOMEM);
1828 opendata->state = state;
1829 atomic_inc(&state->count);
1830 return opendata;
1831}
1832
24311f88
TM		 1833static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1834 fmode_t fmode)
864472e9 1835{
2ced46c2 1836 struct nfs4_state *newstate;
864472e9
TM		 1837 int ret;
1838
24311f88 1839 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
39f897fd 1840 return 0;
dc0b027d
TM		 1841 opendata->o_arg.open_flags = 0;
1842 opendata->o_arg.fmode = fmode;
be36e185
TM		 1843 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1844 NFS_SB(opendata->dentry->d_sb),
1845 fmode, 0);
2ced46c2
TM		 1846 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1847 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1848 nfs4_init_opendata_res(opendata);
b257957e 1849 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1850 if (ret != 0)
1851 return ret;
2ced46c2 1852 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1853 if (IS_ERR(newstate))
1854 return PTR_ERR(newstate);
24311f88
TM		 1855 if (newstate != opendata->state)
1856 ret = -ESTALE;
643168c2 1857 nfs4_close_state(newstate, fmode);
24311f88 1858 return ret;
864472e9
TM		 1859}
1860
1861static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1862{
864472e9
TM		 1863 int ret;
1864
4f14c194
TM		 1865 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1866 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1867 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1868 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1869 /* memory barrier prior to reading state->n_* */
2ced46c2 1870 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1871 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9 1872 smp_rmb();
24311f88
TM		 1873 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1874 if (ret != 0)
1875 return ret;
1876 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1877 if (ret != 0)
1878 return ret;
1879 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1880 if (ret != 0)
1881 return ret;
1ac7e2fd
TM		 1882 /*
1883 * We may have performed cached opens for all three recoveries.
1884 * Check if we need to update the current stateid.
1885 */
1886 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1887 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1888 write_seqlock(&state->seqlock);
1ac7e2fd 1889 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1890 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1891 write_sequnlock(&state->seqlock);
1ac7e2fd 1892 }
864472e9
TM		 1893 return 0;
1894}
1895
1da177e4
LT		 1896/*
1897 * OPEN_RECLAIM:
1898 * reclaim state on the server after a reboot.
1da177e4 1899 */
539cd03a 1900static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1901{
1ac7e2fd 1902 struct nfs_delegation *delegation;
864472e9 1903 struct nfs4_opendata *opendata;
dc0b027d 1904 fmode_t delegation_type = 0;
1da177e4
LT		 1905 int status;
1906
4a1c0893
TM		 1907 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1908 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1909 if (IS_ERR(opendata))
1910 return PTR_ERR(opendata);
1ac7e2fd
TM		 1911 rcu_read_lock();
1912 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1913 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1914 delegation_type = delegation->type;
1ac7e2fd 1915 rcu_read_unlock();
864472e9
TM		 1916 opendata->o_arg.u.delegation_type = delegation_type;
1917 status = nfs4_open_recover(opendata, state);
c6d00e63 1918 nfs4_opendata_put(opendata);
1da177e4
LT		 1919 return status;
1920}
1921
539cd03a 1922static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1923{
1924 struct nfs_server *server = NFS_SERVER(state->inode);
1925 struct nfs4_exception exception = { };
1926 int err;
1927 do {
539cd03a 1928 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1929 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1930 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1931 continue;
168667c4 1932 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1933 break;
1934 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1935 } while (exception.retry);
1936 return err;
1937}
1938
864472e9
TM		 1939static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1940{
1941 struct nfs_open_context *ctx;
1942 int ret;
1943
1944 ctx = nfs4_state_find_open_context(state);
1945 if (IS_ERR(ctx))
91876b13 1946 return -EAGAIN;
539cd03a 1947 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1948 put_nfs_open_context(ctx);
1949 return ret;
1950}
1951
db4f2e63 1952static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1953{
be76b5b6
TM		 1954 switch (err) {
1955 default:
1956 printk(KERN_ERR "NFS: %s: unhandled error "
1957 "%d.\n", __func__, err);
1958 case 0:
1959 case -ENOENT:
8eee52af 1960 case -EAGAIN:
be76b5b6
TM		 1961 case -ESTALE:
1962 break;
1963 case -NFS4ERR_BADSESSION:
1964 case -NFS4ERR_BADSLOT:
1965 case -NFS4ERR_BAD_HIGH_SLOT:
1966 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1967 case -NFS4ERR_DEADSESSION:
1968 set_bit(NFS_DELEGATED_STATE, &state->flags);
1969 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1970 return -EAGAIN;
1971 case -NFS4ERR_STALE_CLIENTID:
1972 case -NFS4ERR_STALE_STATEID:
1973 set_bit(NFS_DELEGATED_STATE, &state->flags);
be76b5b6
TM		 1974 /* Don't recall a delegation if it was lost */
1975 nfs4_schedule_lease_recovery(server->nfs_client);
1976 return -EAGAIN;
352297b9
CL		 1977 case -NFS4ERR_MOVED:
1978 nfs4_schedule_migration_recovery(server);
1979 return -EAGAIN;
8ef2f8d4
CL		 1980 case -NFS4ERR_LEASE_MOVED:
1981 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1982 return -EAGAIN;
be76b5b6
TM		 1983 case -NFS4ERR_DELEG_REVOKED:
1984 case -NFS4ERR_ADMIN_REVOKED:
404ea356 1985 case -NFS4ERR_EXPIRED:
be76b5b6 1986 case -NFS4ERR_BAD_STATEID:
db4f2e63 1987 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1988 nfs_inode_find_state_and_recover(state->inode,
1989 stateid);
1990 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1991 return -EAGAIN;
be76b5b6
TM		 1992 case -NFS4ERR_DELAY:
1993 case -NFS4ERR_GRACE:
1994 set_bit(NFS_DELEGATED_STATE, &state->flags);
1995 ssleep(1);
1996 return -EAGAIN;
db4f2e63
TM		 1997 case -ENOMEM:
1998 case -NFS4ERR_DENIED:
1999 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
2000 return 0;
be76b5b6 2001 }
1da177e4
LT		 2002 return err;
2003}
2004
24311f88
TM		 2005int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
2006 struct nfs4_state *state, const nfs4_stateid *stateid,
2007 fmode_t type)
db4f2e63
TM		 2008{
2009 struct nfs_server *server = NFS_SERVER(state->inode);
2010 struct nfs4_opendata *opendata;
24311f88 2011 int err = 0;
db4f2e63
TM		 2012
2013 opendata = nfs4_open_recoverdata_alloc(ctx, state,
2014 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
2015 if (IS_ERR(opendata))
2016 return PTR_ERR(opendata);
2017 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
5e99b532
JL		 2018 write_seqlock(&state->seqlock);
2019 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2020 write_sequnlock(&state->seqlock);
24311f88
TM		 2021 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2022 switch (type & (FMODE_READ|FMODE_WRITE)) {
2023 case FMODE_READ|FMODE_WRITE:
2024 case FMODE_WRITE:
2025 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
2026 if (err)
2027 break;
2028 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
2029 if (err)
2030 break;
2031 case FMODE_READ:
2032 err = nfs4_open_recover_helper(opendata, FMODE_READ);
2033 }
db4f2e63
TM		 2034 nfs4_opendata_put(opendata);
2035 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
2036}
2037
be05c860
CL		 2038static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
2039{
2040 struct nfs4_opendata *data = calldata;
2041
cb04ad2a
PT		 2042 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
2043 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 2044}
2045
cdd4e68b
TM		 2046static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
2047{
2048 struct nfs4_opendata *data = calldata;
2049
17ead6c8 2050 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 2051
cdd4e68b 2052 data->rpc_status = task->tk_status;
26e976a8 2053 if (data->rpc_status == 0) {
f597c537 2054 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 2055 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 2056 renew_lease(data->o_res.server, data->timestamp);
3e309914 2057 data->rpc_done = 1;
26e976a8 2058 }
cdd4e68b
TM		 2059}
2060
2061static void nfs4_open_confirm_release(void *calldata)
2062{
2063 struct nfs4_opendata *data = calldata;
2064 struct nfs4_state *state = NULL;
2065
2066 /* If this request hasn't been cancelled, do nothing */
2067 if (data->cancelled == 0)
2068 goto out_free;
2069 /* In case of error, no cleanup! */
3e309914 2070 if (!data->rpc_done)
cdd4e68b 2071 goto out_free;
cdd4e68b 2072 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2073 if (!IS_ERR(state))
643168c2 2074 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 2075out_free:
c6d00e63 2076 nfs4_opendata_put(data);
cdd4e68b
TM		 2077}
2078
2079static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 2080 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 2081 .rpc_call_done = nfs4_open_confirm_done,
2082 .rpc_release = nfs4_open_confirm_release,
2083};
2084
2085/*
2086 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
2087 */
2088static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
2089{
2b0143b5 2090 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 2091 struct rpc_task *task;
5138fde0
TM		 2092 struct rpc_message msg = {
2093 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
2094 .rpc_argp = &data->c_arg,
2095 .rpc_resp = &data->c_res,
2096 .rpc_cred = data->owner->so_cred,
2097 };
c970aa85
TM		 2098 struct rpc_task_setup task_setup_data = {
2099 .rpc_client = server->client,
5138fde0 2100 .rpc_message = &msg,
c970aa85
TM		 2101 .callback_ops = &nfs4_open_confirm_ops,
2102 .callback_data = data,
101070ca 2103 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2104 .flags = RPC_TASK_ASYNC,
2105 };
1da177e4
LT		 2106 int status;
2107
17ead6c8 2108 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 2109 kref_get(&data->kref);
3e309914
TM		 2110 data->rpc_done = 0;
2111 data->rpc_status = 0;
5138fde0 2112 data->timestamp = jiffies;
e92c1e0d
BC		 2113 if (data->is_recover)
2114 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
c970aa85 2115 task = rpc_run_task(&task_setup_data);
7a1218a2 2116 if (IS_ERR(task))
cdd4e68b 2117 return PTR_ERR(task);
cdd4e68b
TM		 2118 status = nfs4_wait_for_completion_rpc_task(task);
2119 if (status != 0) {
2120 data->cancelled = 1;
2121 smp_wmb();
2122 } else
2123 status = data->rpc_status;
e6b3c4db 2124 rpc_put_task(task);
1da177e4
LT		 2125 return status;
2126}
2127
24ac23ab 2128static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 2129{
24ac23ab
TM		 2130 struct nfs4_opendata *data = calldata;
2131 struct nfs4_state_owner *sp = data->owner;
549b19cc 2132 struct nfs_client *clp = sp->so_server->nfs_client;
2a606188 2133 enum open_claim_type4 claim = data->o_arg.claim;
5138fde0 2134
24ac23ab 2135 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 2136 goto out_wait;
aac00a8d
TM		 2137 /*
2138 * Check if we still need to send an OPEN call, or if we can use
2139 * a delegation instead.
2140 */
2141 if (data->state != NULL) {
2142 struct nfs_delegation *delegation;
2143
dc0b027d 2144 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 2145 goto out_no_action;
aac00a8d
TM		 2146 rcu_read_lock();
2147 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2a606188 2148 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
652f89f6 2149 goto unlock_no_action;
aac00a8d
TM		 2150 rcu_read_unlock();
2151 }
95b72eb0 2152 /* Update client id. */
549b19cc 2153 data->o_arg.clientid = clp->cl_clientid;
2a606188
TM		 2154 switch (claim) {
2155 default:
2156 break;
8188df17
TM		 2157 case NFS4_OPEN_CLAIM_PREVIOUS:
2158 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2159 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 2160 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 2161 case NFS4_OPEN_CLAIM_FH:
2162 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 2163 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
2164 }
26e976a8 2165 data->timestamp = jiffies;
035168ab 2166 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 2167 &data->o_arg.seq_args,
2240a9e2
TM		 2168 &data->o_res.seq_res,
2169 task) != 0)
2170 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 2171
2172 /* Set the create mode (note dependency on the session type) */
2173 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2174 if (data->o_arg.open_flags & O_EXCL) {
2175 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2176 if (nfs4_has_persistent_session(clp))
2177 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2178 else if (clp->cl_mvops->minor_version > 0)
2179 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2180 }
6ee41268 2181 return;
652f89f6 2182unlock_no_action:
9759b0fb 2183 trace_nfs4_cached_open(data->state);
652f89f6 2184 rcu_read_unlock();
6ee41268
TM		 2185out_no_action:
2186 task->tk_action = NULL;
c8da19b9 2187out_wait:
b75ad4cd 2188 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 2189}
2190
24ac23ab
TM		 2191static void nfs4_open_done(struct rpc_task *task, void *calldata)
2192{
2193 struct nfs4_opendata *data = calldata;
1da177e4 2194
24ac23ab 2195 data->rpc_status = task->tk_status;
d898528c 2196
2e80dbe7 2197 if (!nfs4_sequence_process(task, &data->o_res.seq_res))
14516c3a 2198 return;
d898528c 2199
24ac23ab 2200 if (task->tk_status == 0) {
807d66d8
TM		 2201 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2202 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 2203 case S_IFREG:
2204 break;
2205 case S_IFLNK:
24ac23ab 2206 data->rpc_status = -ELOOP;
6f926b5b
TM		 2207 break;
2208 case S_IFDIR:
24ac23ab 2209 data->rpc_status = -EISDIR;
6f926b5b
TM		 2210 break;
2211 default:
24ac23ab 2212 data->rpc_status = -ENOTDIR;
807d66d8 2213 }
6f926b5b 2214 }
26e976a8 2215 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 2216 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2217 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 2218 }
3e309914 2219 data->rpc_done = 1;
24ac23ab 2220}
6f926b5b 2221
24ac23ab
TM		 2222static void nfs4_open_release(void *calldata)
2223{
2224 struct nfs4_opendata *data = calldata;
2225 struct nfs4_state *state = NULL;
2226
2227 /* If this request hasn't been cancelled, do nothing */
2228 if (data->cancelled == 0)
2229 goto out_free;
2230 /* In case of error, no cleanup! */
3e309914 2231 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 2232 goto out_free;
2233 /* In case we need an open_confirm, no cleanup! */
2234 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2235 goto out_free;
24ac23ab 2236 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2237 if (!IS_ERR(state))
643168c2 2238 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 2239out_free:
c6d00e63 2240 nfs4_opendata_put(data);
24ac23ab
TM		 2241}
2242
2243static const struct rpc_call_ops nfs4_open_ops = {
2244 .rpc_call_prepare = nfs4_open_prepare,
2245 .rpc_call_done = nfs4_open_done,
2246 .rpc_release = nfs4_open_release,
2247};
2248
b257957e 2249static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab 2250{
2b0143b5 2251 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 2252 struct nfs_server *server = NFS_SERVER(dir);
2253 struct nfs_openargs *o_arg = &data->o_arg;
2254 struct nfs_openres *o_res = &data->o_res;
2255 struct rpc_task *task;
5138fde0
TM		 2256 struct rpc_message msg = {
2257 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2258 .rpc_argp = o_arg,
2259 .rpc_resp = o_res,
2260 .rpc_cred = data->owner->so_cred,
2261 };
c970aa85
TM		 2262 struct rpc_task_setup task_setup_data = {
2263 .rpc_client = server->client,
5138fde0 2264 .rpc_message = &msg,
c970aa85
TM		 2265 .callback_ops = &nfs4_open_ops,
2266 .callback_data = data,
101070ca 2267 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2268 .flags = RPC_TASK_ASYNC,
2269 };
24ac23ab
TM		 2270 int status;
2271
a9c92d6b 2272 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 2273 kref_get(&data->kref);
3e309914
TM		 2274 data->rpc_done = 0;
2275 data->rpc_status = 0;
2ced46c2 2276 data->cancelled = 0;
bdeca1b7
TM		 2277 data->is_recover = 0;
2278 if (isrecover) {
8fe72bac 2279 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 2280 data->is_recover = 1;
2281 }
c970aa85 2282 task = rpc_run_task(&task_setup_data);
b257957e
AB		 2283 if (IS_ERR(task))
2284 return PTR_ERR(task);
2285 status = nfs4_wait_for_completion_rpc_task(task);
2286 if (status != 0) {
2287 data->cancelled = 1;
2288 smp_wmb();
2289 } else
2290 status = data->rpc_status;
2291 rpc_put_task(task);
2292
2293 return status;
2294}
2295
2296static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2297{
2b0143b5 2298 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2299 struct nfs_openres *o_res = &data->o_res;
2300 int status;
2301
2302 status = nfs4_run_open_task(data, 1);
2303 if (status != 0 || !data->rpc_done)
2304 return status;
2305
6926afd1
TM		 2306 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2307
b257957e
AB		 2308 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2309 status = _nfs4_proc_open_confirm(data);
2310 if (status != 0)
2311 return status;
2312 }
2313
2314 return status;
2315}
2316
f3792d63
TM		 2317/*
2318 * Additional permission checks in order to distinguish between an
2319 * open for read, and an open for execute. This works around the
2320 * fact that NFSv4 OPEN treats read and execute permissions as being
2321 * the same.
2322 * Note that in the non-execute case, we want to turn off permission
2323 * checking if we just created a new file (POSIX open() semantics).
2324 */
6168f62c
WAA		 2325static int nfs4_opendata_access(struct rpc_cred *cred,
2326 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2327 struct nfs4_state *state, fmode_t fmode,
2328 int openflags)
6168f62c
WAA		 2329{
2330 struct nfs_access_entry cache;
2331 u32 mask;
2332
2333 /* access call failed or for some reason the server doesn't
2334 * support any access modes -- defer access call until later */
2335 if (opendata->o_res.access_supported == 0)
2336 return 0;
2337
2338 mask = 0;
f3792d63
TM		 2339 /*
2340 * Use openflags to check for exec, because fmode won't
2341 * always have FMODE_EXEC set when file open for exec.
2342 */
f8d9a897
WAA		 2343 if (openflags & __FMODE_EXEC) {
2344 /* ONLY check for exec rights */
2345 mask = MAY_EXEC;
f3792d63 2346 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2347 mask = MAY_READ;
6168f62c
WAA		 2348
2349 cache.cred = cred;
2350 cache.jiffies = jiffies;
2351 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2352 nfs_access_add_cache(state->inode, &cache);
2353
bbd3a8ee 2354 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2355 return 0;
2356
2357 /* even though OPEN succeeded, access is denied. Close the file */
2358 nfs4_close_state(state, fmode);
998f40b5 2359 return -EACCES;
6168f62c
WAA		 2360}
2361
b257957e
AB		 2362/*
2363 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2364 */
2365static int _nfs4_proc_open(struct nfs4_opendata *data)
2366{
2b0143b5 2367 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2368 struct nfs_server *server = NFS_SERVER(dir);
2369 struct nfs_openargs *o_arg = &data->o_arg;
2370 struct nfs_openres *o_res = &data->o_res;
2371 int status;
2372
2373 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2374 if (!data->rpc_done)
2375 return status;
2376 if (status != 0) {
2377 if (status == -NFS4ERR_BADNAME &&
2378 !(o_arg->open_flags & O_CREAT))
2379 return -ENOENT;
24ac23ab 2380 return status;
08ef7bd3 2381 }
24ac23ab 2382
6926afd1
TM		 2383 nfs_fattr_map_and_free_names(server, &data->f_attr);
2384
5bc2afc2 2385 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2386 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2387 if (o_arg->open_flags & O_EXCL)
2388 data->file_created = 1;
2389 else if (o_res->cinfo.before != o_res->cinfo.after)
2390 data->file_created = 1;
2391 }
0df5dd4a
TM		 2392 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2393 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2394 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2395 status = _nfs4_proc_open_confirm(data);
1da177e4 2396 if (status != 0)
24ac23ab 2397 return status;
1da177e4
LT		 2398 }
2399 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2400 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2401 return 0;
1da177e4
LT		 2402}
2403
d83217c1
AA		 2404static int nfs4_recover_expired_lease(struct nfs_server *server)
2405{
2406 return nfs4_client_recover_expired_lease(server->nfs_client);
2407}
2408
1da177e4
LT		 2409/*
2410 * OPEN_EXPIRED:
2411 * reclaim state on the server after a network partition.
2412 * Assumes caller holds the appropriate lock
2413 */
539cd03a 2414static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2415{
e56e0b78 2416 struct nfs4_opendata *opendata;
864472e9 2417 int ret;
1da177e4 2418
4a1c0893 2419 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2420 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2421 if (IS_ERR(opendata))
2422 return PTR_ERR(opendata);
864472e9 2423 ret = nfs4_open_recover(opendata, state);
35d05778 2424 if (ret == -ESTALE)
3d4ff43d 2425 d_drop(ctx->dentry);
c6d00e63 2426 nfs4_opendata_put(opendata);
864472e9 2427 return ret;
1da177e4
LT		 2428}
2429
a9ed2e25 2430static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2431{
539cd03a 2432 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2433 struct nfs4_exception exception = { };
2434 int err;
2435
2436 do {
539cd03a 2437 err = _nfs4_open_expired(ctx, state);
42113a75 2438 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2439 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2440 continue;
a9ed2e25
TM		 2441 switch (err) {
2442 default:
2443 goto out;
2444 case -NFS4ERR_GRACE:
2445 case -NFS4ERR_DELAY:
2446 nfs4_handle_exception(server, err, &exception);
2447 err = 0;
2448 }
202b50dc 2449 } while (exception.retry);
a9ed2e25 2450out:
202b50dc
TM		 2451 return err;
2452}
2453
1da177e4
LT		 2454static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2455{
1da177e4 2456 struct nfs_open_context *ctx;
864472e9 2457 int ret;
1da177e4 2458
864472e9
TM		 2459 ctx = nfs4_state_find_open_context(state);
2460 if (IS_ERR(ctx))
91876b13 2461 return -EAGAIN;
539cd03a 2462 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2463 put_nfs_open_context(ctx);
2464 return ret;
1da177e4
LT		 2465}
2466
41020b67
TM		 2467static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state,
2468 const nfs4_stateid *stateid)
4dfd4f7a 2469{
41020b67 2470 nfs_remove_bad_delegation(state->inode, stateid);
4dfd4f7a
TM		 2471 write_seqlock(&state->seqlock);
2472 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2473 write_sequnlock(&state->seqlock);
2474 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2475}
2476
2477static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2478{
2479 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
41020b67 2480 nfs_finish_clear_delegation_stateid(state, NULL);
4dfd4f7a
TM		 2481}
2482
2483static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2484{
2485 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2486 nfs40_clear_delegation_stateid(state);
2487 return nfs4_open_expired(sp, state);
2488}
2489
45870d69
TM		 2490static int nfs40_test_and_free_expired_stateid(struct nfs_server *server,
2491 nfs4_stateid *stateid,
2492 struct rpc_cred *cred)
2493{
2494 return -NFS4ERR_BAD_STATEID;
2495}
2496
f062eb6c 2497#if defined(CONFIG_NFS_V4_1)
4586f6e2
TM		 2498static int nfs41_test_and_free_expired_stateid(struct nfs_server *server,
2499 nfs4_stateid *stateid,
2500 struct rpc_cred *cred)
2501{
2502 int status;
2503
f7a62ada
TM		 2504 switch (stateid->type) {
2505 default:
2506 break;
2507 case NFS4_INVALID_STATEID_TYPE:
2508 case NFS4_SPECIAL_STATEID_TYPE:
2509 return -NFS4ERR_BAD_STATEID;
2510 case NFS4_REVOKED_STATEID_TYPE:
2511 goto out_free;
2512 }
4586f6e2 2513
f7a62ada 2514 status = nfs41_test_stateid(server, stateid, cred);
4586f6e2
TM		 2515 switch (status) {
2516 case -NFS4ERR_EXPIRED:
2517 case -NFS4ERR_ADMIN_REVOKED:
2518 case -NFS4ERR_DELEG_REVOKED:
f7a62ada
TM		 2519 break;
2520 default:
4586f6e2
TM		 2521 return status;
2522 }
f7a62ada
TM		 2523out_free:
2524 /* Ack the revoked state to the server */
f0b0bf88 2525 nfs41_free_stateid(server, stateid, cred, true);
f7a62ada 2526 return -NFS4ERR_EXPIRED;
4586f6e2
TM		 2527}
2528
0c116cad 2529static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2530{
f062eb6c 2531 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2532 nfs4_stateid stateid;
ab7cb0df 2533 struct nfs_delegation *delegation;
0c116cad
TM		 2534 struct rpc_cred *cred;
2535 int status;
3e60ffdd 2536
ab7cb0df
TM		 2537 /* Get the delegation credential for use by test/free_stateid */
2538 rcu_read_lock();
2539 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2540 if (delegation == NULL) {
ab7cb0df 2541 rcu_read_unlock();
0c116cad
TM		 2542 return;
2543 }
2544
2545 nfs4_stateid_copy(&stateid, &delegation->stateid);
4c8e5447
TM		 2546 if (test_bit(NFS_DELEGATION_REVOKED, &delegation->flags)) {
2547 rcu_read_unlock();
41020b67 2548 nfs_finish_clear_delegation_stateid(state, &stateid);
4c8e5447
TM		 2549 return;
2550 }
0c116cad 2551
63d63cbf
TM		 2552 if (!test_and_clear_bit(NFS_DELEGATION_TEST_EXPIRED, &delegation->flags)) {
2553 rcu_read_unlock();
2554 return;
2555 }
2556
0c116cad
TM		 2557 cred = get_rpccred(delegation->cred);
2558 rcu_read_unlock();
4586f6e2 2559 status = nfs41_test_and_free_expired_stateid(server, &stateid, cred);
0c116cad 2560 trace_nfs4_test_delegation_stateid(state, NULL, status);
f7a62ada 2561 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID)
41020b67 2562 nfs_finish_clear_delegation_stateid(state, &stateid);
ab7cb0df 2563
0c116cad 2564 put_rpccred(cred);
3e60ffdd
CL		 2565}
2566
c5896fc8
TM		 2567/**
2568 * nfs41_check_expired_locks - possibly free a lock stateid
2569 *
2570 * @state: NFSv4 state for an inode
2571 *
2572 * Returns NFS_OK if recovery for this stateid is now finished.
2573 * Otherwise a negative NFS4ERR value is returned.
2574 */
2575static int nfs41_check_expired_locks(struct nfs4_state *state)
2576{
2577 int status, ret = NFS_OK;
d75a6a0e 2578 struct nfs4_lock_state *lsp, *prev = NULL;
c5896fc8
TM		 2579 struct nfs_server *server = NFS_SERVER(state->inode);
2580
2581 if (!test_bit(LK_STATE_IN_USE, &state->flags))
2582 goto out;
d75a6a0e
BC		 2583
2584 spin_lock(&state->state_lock);
c5896fc8
TM		 2585 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
2586 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
2587 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
2588
d75a6a0e
BC		 2589 atomic_inc(&lsp->ls_count);
2590 spin_unlock(&state->state_lock);
2591
2592 nfs4_put_lock_state(prev);
2593 prev = lsp;
2594
c5896fc8
TM		 2595 status = nfs41_test_and_free_expired_stateid(server,
2596 &lsp->ls_stateid,
2597 cred);
2598 trace_nfs4_test_lock_stateid(state, lsp, status);
2599 if (status == -NFS4ERR_EXPIRED ||
2600 status == -NFS4ERR_BAD_STATEID) {
2601 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
67dd4830 2602 lsp->ls_stateid.type = NFS4_INVALID_STATEID_TYPE;
c5896fc8
TM		 2603 if (!recover_lost_locks)
2604 set_bit(NFS_LOCK_LOST, &lsp->ls_flags);
2605 } else if (status != NFS_OK) {
2606 ret = status;
d75a6a0e
BC		 2607 nfs4_put_lock_state(prev);
2608 goto out;
c5896fc8 2609 }
d75a6a0e 2610 spin_lock(&state->state_lock);
c5896fc8 2611 }
d75a6a0e
BC		 2612 }
2613 spin_unlock(&state->state_lock);
2614 nfs4_put_lock_state(prev);
c5896fc8
TM		 2615out:
2616 return ret;
2617}
2618
3e60ffdd
CL		 2619/**
2620 * nfs41_check_open_stateid - possibly free an open stateid
2621 *
2622 * @state: NFSv4 state for an inode
2623 *
2624 * Returns NFS_OK if recovery for this stateid is now finished.
2625 * Otherwise a negative NFS4ERR value is returned.
2626 */
2627static int nfs41_check_open_stateid(struct nfs4_state *state)
2628{
2629 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2630 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2631 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2632 int status;
2633
b134fc4a 2634 if (test_bit(NFS_OPEN_STATE, &state->flags) == 0) {
8a64c4ef
TM		 2635 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0) {
2636 if (nfs4_have_delegation(state->inode, state->state))
2637 return NFS_OK;
2638 return -NFS4ERR_OPENMODE;
2639 }
3e60ffdd 2640 return -NFS4ERR_BAD_STATEID;
b134fc4a 2641 }
4586f6e2 2642 status = nfs41_test_and_free_expired_stateid(server, stateid, cred);
08cb47fa 2643 trace_nfs4_test_open_stateid(state, NULL, status);
f7a62ada 2644 if (status == -NFS4ERR_EXPIRED || status == -NFS4ERR_BAD_STATEID) {
3e60ffdd
CL		 2645 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2646 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2647 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2648 clear_bit(NFS_OPEN_STATE, &state->flags);
67dd4830 2649 stateid->type = NFS4_INVALID_STATEID_TYPE;
b01dd1d8 2650 }
8a64c4ef
TM		 2651 if (status != NFS_OK)
2652 return status;
2653 if (nfs_open_stateid_recover_openmode(state))
2654 return -NFS4ERR_OPENMODE;
2655 return NFS_OK;
b01dd1d8
BS		 2656}
2657
2658static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2659{
eb64cf96 2660 int status;
b01dd1d8 2661
0c116cad 2662 nfs41_check_delegation_stateid(state);
c5896fc8
TM		 2663 status = nfs41_check_expired_locks(state);
2664 if (status != NFS_OK)
2665 return status;
3e60ffdd 2666 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2667 if (status != NFS_OK)
2668 status = nfs4_open_expired(sp, state);
2669 return status;
f062eb6c
BS		 2670}
2671#endif
2672
aa53ed54
JL		 2673/*
2674 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2675 * fields corresponding to attributes that were used to store the verifier.
2676 * Make sure we clobber those fields in the later setattr call
2677 */
5334c5bd
KM		 2678static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2679 struct iattr *sattr, struct nfs4_label **label)
aa53ed54 2680{
5334c5bd
KM		 2681 const u32 *attrset = opendata->o_res.attrset;
2682
2683 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
aa53ed54
JL		 2684 !(sattr->ia_valid & ATTR_ATIME_SET))
2685 sattr->ia_valid |= ATTR_ATIME;
2686
5334c5bd 2687 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
aa53ed54
JL		 2688 !(sattr->ia_valid & ATTR_MTIME_SET))
2689 sattr->ia_valid |= ATTR_MTIME;
5334c5bd
KM		 2690
2691 /* Except MODE, it seems harmless of setting twice. */
2692 if ((attrset[1] & FATTR4_WORD1_MODE))
2693 sattr->ia_valid &= ~ATTR_MODE;
2694
2695 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2696 *label = NULL;
aa53ed54
JL		 2697}
2698
c21443c2
TM		 2699static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2700 fmode_t fmode,
2701 int flags,
3efb9722 2702 struct nfs_open_context *ctx)
c21443c2
TM		 2703{
2704 struct nfs4_state_owner *sp = opendata->owner;
2705 struct nfs_server *server = sp->so_server;
275bb307 2706 struct dentry *dentry;
c21443c2
TM		 2707 struct nfs4_state *state;
2708 unsigned int seq;
2709 int ret;
2710
2711 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2712
2713 ret = _nfs4_proc_open(opendata);
dca78001 2714 if (ret != 0)
c21443c2
TM		 2715 goto out;
2716
2717 state = nfs4_opendata_to_nfs4_state(opendata);
2718 ret = PTR_ERR(state);
2719 if (IS_ERR(state))
2720 goto out;
2721 if (server->caps & NFS_CAP_POSIX_LOCK)
2722 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
a8ce377a
JL		 2723 if (opendata->o_res.rflags & NFS4_OPEN_RESULT_MAY_NOTIFY_LOCK)
2724 set_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags);
c21443c2 2725
275bb307 2726 dentry = opendata->dentry;
2b0143b5 2727 if (d_really_is_negative(dentry)) {
668d0cd5 2728 struct dentry *alias;
275bb307 2729 d_drop(dentry);
668d0cd5
AV		 2730 alias = d_exact_alias(dentry, state->inode);
2731 if (!alias)
2732 alias = d_splice_alias(igrab(state->inode), dentry);
2733 /* d_splice_alias() can't fail here - it's a non-directory */
2734 if (alias) {
275bb307 2735 dput(ctx->dentry);
668d0cd5 2736 ctx->dentry = dentry = alias;
275bb307
TM		 2737 }
2738 nfs_set_verifier(dentry,
2b0143b5 2739 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2740 }
2741
c21443c2
TM		 2742 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2743 if (ret != 0)
2744 goto out;
2745
3efb9722 2746 ctx->state = state;
2b0143b5 2747 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2748 nfs_inode_attach_open_context(ctx);
2749 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2750 nfs4_schedule_stateid_recovery(server, state);
2751 }
c21443c2
TM		 2752out:
2753 return ret;
2754}
2755
1da177e4 2756/*
24ac23ab 2757 * Returns a referenced nfs4_state
1da177e4 2758 */
82be417a 2759static int _nfs4_do_open(struct inode *dir,
4197a055 2760 struct nfs_open_context *ctx,
82be417a
AA		 2761 int flags,
2762 struct iattr *sattr,
5bc2afc2
TM		 2763 struct nfs4_label *label,
2764 int *opened)
1da177e4
LT		 2765{
2766 struct nfs4_state_owner *sp;
2767 struct nfs4_state *state = NULL;
2768 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2769 struct nfs4_opendata *opendata;
4197a055
TM		 2770 struct dentry *dentry = ctx->dentry;
2771 struct rpc_cred *cred = ctx->cred;
2772 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2773 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2774 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2775 struct nfs4_label *olabel = NULL;
aac00a8d 2776 int status;
1da177e4
LT		 2777
2778 /* Protect against reboot recovery conflicts */
1da177e4 2779 status = -ENOMEM;
d1e284d5
TM		 2780 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2781 if (sp == NULL) {
1da177e4
LT		 2782 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2783 goto out_err;
2784 }
58d9714a
TM		 2785 status = nfs4_recover_expired_lease(server);
2786 if (status != 0)
b4454fe1 2787 goto err_put_state_owner;
2b0143b5
DH		 2788 if (d_really_is_positive(dentry))
2789 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2790 status = -ENOMEM;
2b0143b5 2791 if (d_really_is_positive(dentry))
49f9a0fa 2792 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2793 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2794 label, claim, GFP_KERNEL);
e56e0b78 2795 if (opendata == NULL)
95d35cb4 2796 goto err_put_state_owner;
1da177e4 2797
14c43f76
DQ		 2798 if (label) {
2799 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2800 if (IS_ERR(olabel)) {
2801 status = PTR_ERR(olabel);
2802 goto err_opendata_put;
2803 }
2804 }
2805
e911b815
TM		 2806 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2807 if (!opendata->f_attr.mdsthreshold) {
2808 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2809 if (!opendata->f_attr.mdsthreshold)
2810 goto err_free_label;
2811 }
1549210f 2812 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2813 }
2b0143b5
DH		 2814 if (d_really_is_positive(dentry))
2815 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2816
3efb9722 2817 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2818 if (status != 0)
14c43f76 2819 goto err_free_label;
3efb9722 2820 state = ctx->state;
6168f62c 2821
efcbc04e 2822 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 2823 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
5334c5bd 2824 nfs4_exclusive_attrset(opendata, sattr, &label);
a1d1c4f1
TM		 2825 /*
2826 * send create attributes which was not set by open
2827 * with an extra setattr.
2828 */
2829 if (sattr->ia_valid & NFS4_VALID_ATTRS) {
2830 nfs_fattr_init(opendata->o_res.f_attr);
2831 status = nfs4_do_setattr(state->inode, cred,
2832 opendata->o_res.f_attr, sattr,
29b59f94 2833 ctx, label, olabel);
a1d1c4f1
TM		 2834 if (status == 0) {
2835 nfs_setattr_update_inode(state->inode, sattr,
2836 opendata->o_res.f_attr);
2837 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2838 }
1775fd3e 2839 }
0ab64e0e 2840 }
c5c3fb5f 2841 if (opened && opendata->file_created)
5bc2afc2 2842 *opened |= FILE_CREATED;
82be417a 2843
e911b815 2844 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2845 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2846 opendata->f_attr.mdsthreshold = NULL;
2847 }
82be417a 2848
14c43f76
DQ		 2849 nfs4_label_free(olabel);
2850
c6d00e63 2851 nfs4_opendata_put(opendata);
1da177e4 2852 nfs4_put_state_owner(sp);
1da177e4 2853 return 0;
14c43f76
DQ		 2854err_free_label:
2855 nfs4_label_free(olabel);
c6d00e63
TM		 2856err_opendata_put:
2857 nfs4_opendata_put(opendata);
e56e0b78
TM		 2858err_put_state_owner:
2859 nfs4_put_state_owner(sp);
1da177e4 2860out_err:
1da177e4
LT		 2861 return status;
2862}
2863
2864
82be417a 2865static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2866 struct nfs_open_context *ctx,
82be417a
AA		 2867 int flags,
2868 struct iattr *sattr,
5bc2afc2
TM		 2869 struct nfs4_label *label,
2870 int *opened)
1da177e4 2871{
49f9a0fa 2872 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2873 struct nfs4_exception exception = { };
2874 struct nfs4_state *res;
2875 int status;
2876
2877 do {
5bc2afc2 2878 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2879 res = ctx->state;
42113a75 2880 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2881 if (status == 0)
2882 break;
2883 /* NOTE: BAD_SEQID means the server and client disagree about the
2884 * book-keeping w.r.t. state-changing operations
2885 * (OPEN/CLOSE/LOCK/LOCKU...)
2886 * It is actually a sign of a bug on the client or on the server.
2887 *
2888 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2889 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2890 * have unhashed the old state_owner for us, and that we can
2891 * therefore safely retry using a new one. We should still warn
2892 * the user though...
2893 */
2894 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2895 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2896 " returned a bad sequence-id error!\n",
2897 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2898 exception.retry = 1;
2899 continue;
2900 }
550f5747
TM		 2901 /*
2902 * BAD_STATEID on OPEN means that the server cancelled our
2903 * state before it received the OPEN_CONFIRM.
2904 * Recover by retrying the request as per the discussion
2905 * on Page 181 of RFC3530.
2906 */
2907 if (status == -NFS4ERR_BAD_STATEID) {
2908 exception.retry = 1;
2909 continue;
2910 }
aac00a8d
TM		 2911 if (status == -EAGAIN) {
2912 /* We must have found a delegation */
2913 exception.retry = 1;
2914 continue;
2915 }
49f9a0fa
TM		 2916 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2917 continue;
2918 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2919 status, &exception));
2920 } while (exception.retry);
2921 return res;
2922}
2923
8487c479
TM		 2924static int _nfs4_do_setattr(struct inode *inode,
2925 struct nfs_setattrargs *arg,
2926 struct nfs_setattrres *res,
2927 struct rpc_cred *cred,
29b59f94 2928 struct nfs_open_context *ctx)
1da177e4 2929{
3e4f6290 2930 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2931 struct rpc_message msg = {
659bfcd6 2932 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
8487c479
TM		 2933 .rpc_argp = arg,
2934 .rpc_resp = res,
659bfcd6 2935 .rpc_cred = cred,
1da177e4 2936 };
abf4e13c 2937 struct rpc_cred *delegation_cred = NULL;
26e976a8 2938 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2939 fmode_t fmode;
2940 bool truncate;
65e4308d 2941 int status;
1da177e4 2942
8487c479 2943 nfs_fattr_init(res->fattr);
1da177e4 2944
ee3ae84e 2945 /* Servers should only apply open mode checks for file size changes */
8487c479 2946 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
ee3ae84e
TM		 2947 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2948
8487c479 2949 if (nfs4_copy_delegation_stateid(inode, fmode, &arg->stateid, &delegation_cred)) {
ee3ae84e 2950 /* Use that stateid */
29b59f94 2951 } else if (truncate && ctx != NULL) {
17393475 2952 struct nfs_lock_context *l_ctx;
29b59f94 2953 if (!nfs4_valid_open_stateid(ctx->state))
0418dae1 2954 return -EBADF;
17393475
N		 2955 l_ctx = nfs_get_lock_context(ctx);
2956 if (IS_ERR(l_ctx))
2957 return PTR_ERR(l_ctx);
7a0566b3
N		 2958 status = nfs4_select_rw_stateid(ctx->state, FMODE_WRITE, l_ctx,
2959 &arg->stateid, &delegation_cred);
2960 nfs_put_lock_context(l_ctx);
2961 if (status == -EIO)
0418dae1 2962 return -EBADF;
08e9eac4 2963 } else
8487c479 2964 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
abf4e13c
TM		 2965 if (delegation_cred)
2966 msg.rpc_cred = delegation_cred;
1da177e4 2967
8487c479 2968 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
abf4e13c
TM		 2969
2970 put_rpccred(delegation_cred);
29b59f94 2971 if (status == 0 && ctx != NULL)
26e976a8 2972 renew_lease(server, timestamp);
8487c479 2973 trace_nfs4_setattr(inode, &arg->stateid, status);
65e4308d 2974 return status;
1da177e4
LT		 2975}
2976
659bfcd6
TM		 2977static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2978 struct nfs_fattr *fattr, struct iattr *sattr,
29b59f94 2979 struct nfs_open_context *ctx, struct nfs4_label *ilabel,
1775fd3e 2980 struct nfs4_label *olabel)
1da177e4 2981{
3e4f6290 2982 struct nfs_server *server = NFS_SERVER(inode);
29b59f94 2983 struct nfs4_state *state = ctx ? ctx->state : NULL;
8487c479
TM		 2984 struct nfs_setattrargs arg = {
2985 .fh = NFS_FH(inode),
2986 .iap = sattr,
2987 .server = server,
2988 .bitmask = server->attr_bitmask,
2989 .label = ilabel,
2990 };
2991 struct nfs_setattrres res = {
2992 .fattr = fattr,
2993 .label = olabel,
2994 .server = server,
2995 };
a1d0b5ee
TM		 2996 struct nfs4_exception exception = {
2997 .state = state,
3114ea7a 2998 .inode = inode,
8487c479 2999 .stateid = &arg.stateid,
a1d0b5ee 3000 };
1da177e4 3001 int err;
8487c479
TM		 3002
3003 arg.bitmask = nfs4_bitmask(server, ilabel);
3004 if (ilabel)
3005 arg.bitmask = nfs4_bitmask(server, olabel);
3006
1da177e4 3007 do {
29b59f94 3008 err = _nfs4_do_setattr(inode, &arg, &res, cred, ctx);
451146be
TM		 3009 switch (err) {
3010 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 3011 if (!(sattr->ia_valid & ATTR_SIZE)) {
3012 pr_warn_once("NFSv4: server %s is incorrectly "
3013 "applying open mode checks to "
3014 "a SETATTR that is not "
3015 "changing file size.\n",
3016 server->nfs_client->cl_hostname);
3017 }
451146be
TM		 3018 if (state && !(state->state & FMODE_WRITE)) {
3019 err = -EBADF;
3020 if (sattr->ia_valid & ATTR_OPEN)
3021 err = -EACCES;
3022 goto out;
3023 }
3024 }
3025 err = nfs4_handle_exception(server, err, &exception);
1da177e4 3026 } while (exception.retry);
451146be 3027out:
1da177e4
LT		 3028 return err;
3029}
3030
500d701f
PT		 3031static bool
3032nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
3033{
3034 if (inode == NULL || !nfs_have_layout(inode))
3035 return false;
3036
3037 return pnfs_wait_on_layoutreturn(inode, task);
3038}
3039
1da177e4
LT		 3040struct nfs4_closedata {
3041 struct inode *inode;
3042 struct nfs4_state *state;
3043 struct nfs_closeargs arg;
3044 struct nfs_closeres res;
cf805165
TM		 3045 struct {
3046 struct nfs4_layoutreturn_args arg;
3047 struct nfs4_layoutreturn_res res;
4d796d75 3048 struct nfs4_xdr_opaque_data ld_private;
cf805165
TM		 3049 u32 roc_barrier;
3050 bool roc;
3051 } lr;
516a6af6 3052 struct nfs_fattr fattr;
26e976a8 3053 unsigned long timestamp;
1da177e4
LT		 3054};
3055
963d8fe5 3056static void nfs4_free_closedata(void *data)
9512135d 3057{
963d8fe5
TM		 3058 struct nfs4_closedata *calldata = data;
3059 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 3060 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 3061
cf805165 3062 if (calldata->lr.roc)
1c5bd76d
TM		 3063 pnfs_roc_release(&calldata->lr.arg, &calldata->lr.res,
3064 calldata->res.lr_ret);
9512135d
TM		 3065 nfs4_put_open_state(calldata->state);
3066 nfs_free_seqid(calldata->arg.seqid);
9512135d 3067 nfs4_put_state_owner(sp);
322b2b90 3068 nfs_sb_deactive(sb);
9512135d
TM		 3069 kfree(calldata);
3070}
3071
963d8fe5 3072static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 3073{
963d8fe5 3074 struct nfs4_closedata *calldata = data;
1da177e4 3075 struct nfs4_state *state = calldata->state;
1da177e4 3076 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 3077 nfs4_stateid *res_stateid = NULL;
1da177e4 3078
a3ca5651 3079 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 3080 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
3081 return;
42113a75 3082 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
cf805165
TM		 3083
3084 /* Handle Layoutreturn errors */
3085 if (calldata->arg.lr_args && task->tk_status != 0) {
3086 switch (calldata->res.lr_ret) {
3087 default:
3088 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
3089 break;
3090 case 0:
3091 calldata->arg.lr_args = NULL;
3092 calldata->res.lr_res = NULL;
3093 break;
3094 case -NFS4ERR_ADMIN_REVOKED:
3095 case -NFS4ERR_DELEG_REVOKED:
3096 case -NFS4ERR_EXPIRED:
3097 case -NFS4ERR_BAD_STATEID:
3098 case -NFS4ERR_OLD_STATEID:
3099 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
3100 case -NFS4ERR_WRONG_CRED:
3101 calldata->arg.lr_args = NULL;
3102 calldata->res.lr_res = NULL;
3103 calldata->res.lr_ret = 0;
3104 rpc_restart_call_prepare(task);
3105 return;
3106 }
3107 }
3108
1da177e4
LT		 3109 /* hmm. we are done with the inode, and in the process of freeing
3110 * the state_owner. we keep this around to process errors
3111 */
1da177e4
LT		 3112 switch (task->tk_status) {
3113 case 0:
412f6c4c 3114 res_stateid = &calldata->res.stateid;
26e976a8 3115 renew_lease(server, calldata->timestamp);
412f6c4c 3116 break;
69794ad7 3117 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 3118 case -NFS4ERR_STALE_STATEID:
26d36301
TM		 3119 case -NFS4ERR_EXPIRED:
3120 nfs4_free_revoked_stateid(server,
3121 &calldata->arg.stateid,
3122 task->tk_msg.rpc_cred);
9e33bed5
TM		 3123 case -NFS4ERR_OLD_STATEID:
3124 case -NFS4ERR_BAD_STATEID:
566fcec6 3125 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 3126 &state->open_stateid)) {
566fcec6
TM		 3127 rpc_restart_call_prepare(task);
3128 goto out_release;
3129 }
dc0b027d 3130 if (calldata->arg.fmode == 0)
9e33bed5 3131 break;
1da177e4 3132 default:
8478eaa1 3133 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 3134 rpc_restart_call_prepare(task);
69794ad7
TM		 3135 goto out_release;
3136 }
1da177e4 3137 }
4a1e2feb
TM		 3138 nfs_clear_open_stateid(state, &calldata->arg.stateid,
3139 res_stateid, calldata->arg.fmode);
69794ad7 3140out_release:
72211dbe 3141 nfs_release_seqid(calldata->arg.seqid);
516a6af6 3142 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 3143 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 3144}
3145
4ce70ada 3146static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 3147{
4ce70ada 3148 struct nfs4_closedata *calldata = data;
9512135d 3149 struct nfs4_state *state = calldata->state;
7fdab069 3150 struct inode *inode = calldata->inode;
aee7af35 3151 bool is_rdonly, is_wronly, is_rdwr;
88069f77 3152 int call_close = 0;
9512135d 3153
a3ca5651 3154 dprintk("%s: begin!\n", __func__);
963d8fe5 3155 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 3156 goto out_wait;
003707c7 3157
88069f77 3158 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 3159 spin_lock(&state->owner->so_lock);
aee7af35
TM		 3160 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
3161 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
3162 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 3163 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 3164 /* Calculate the change in open mode */
cd9288ff 3165 calldata->arg.fmode = 0;
e7616923 3166 if (state->n_rdwr == 0) {
cd9288ff
TM		 3167 if (state->n_rdonly == 0)
3168 call_close |= is_rdonly;
3169 else if (is_rdonly)
3170 calldata->arg.fmode |= FMODE_READ;
3171 if (state->n_wronly == 0)
3172 call_close |= is_wronly;
3173 else if (is_wronly)
3174 calldata->arg.fmode |= FMODE_WRITE;
e547f262
TM		 3175 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
3176 call_close |= is_rdwr;
cd9288ff
TM		 3177 } else if (is_rdwr)
3178 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
3179
5cc7861e
TM		 3180 if (!nfs4_valid_open_stateid(state) ||
3181 test_bit(NFS_OPEN_STATE, &state->flags) == 0)
5d422301 3182 call_close = 0;
4cecb76f 3183 spin_unlock(&state->owner->so_lock);
88069f77
TM		 3184
3185 if (!call_close) {
963d8fe5 3186 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 3187 goto out_no_action;
9512135d 3188 }
88069f77 3189
1c5bd76d 3190 if (!calldata->lr.roc && nfs4_wait_on_layoutreturn(inode, task)) {
500d701f
PT		 3191 nfs_release_seqid(calldata->arg.seqid);
3192 goto out_wait;
3193 }
3194
3ecefc92 3195 if (calldata->arg.fmode == 0) {
88069f77 3196 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3ecefc92
TM		 3197
3198 /* Close-to-open cache consistency revalidation */
3199 if (!nfs4_have_delegation(inode, FMODE_READ))
3200 calldata->arg.bitmask = NFS_SERVER(inode)->cache_consistency_bitmask;
3201 else
3202 calldata->arg.bitmask = NULL;
3203 }
3c13cb5b 3204
6ae37339
TM		 3205 calldata->arg.share_access =
3206 nfs4_map_atomic_open_share(NFS_SERVER(inode),
3207 calldata->arg.fmode, 0);
88069f77 3208
516a6af6 3209 nfs_fattr_init(calldata->res.fattr);
26e976a8 3210 calldata->timestamp = jiffies;
7fdab069 3211 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 3212 &calldata->arg.seq_args,
3213 &calldata->res.seq_res,
2240a9e2
TM		 3214 task) != 0)
3215 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 3216 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 3217 return;
3218out_no_action:
3219 task->tk_action = NULL;
3220out_wait:
3221 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 3222}
3223
963d8fe5 3224static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 3225 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 3226 .rpc_call_done = nfs4_close_done,
3227 .rpc_release = nfs4_free_closedata,
3228};
3229
1da177e4
LT		 3230/*
3231 * It is possible for data to be read/written from a mem-mapped file
3232 * after the sys_close call (which hits the vfs layer as a flush).
3233 * This means that we can't safely call nfsv4 close on a file until
3234 * the inode is cleared. This in turn means that we are not good
3235 * NFSv4 citizens - we do not indicate to the server to update the file's
3236 * share state even when we are done with one of the three share
3237 * stateid's in the inode.
3238 *
3239 * NOTE: Caller must be holding the sp->so_owner semaphore!
3240 */
1f7977c1 3241int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 3242{
4a35bd41 3243 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 3244 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 3245 struct nfs4_closedata *calldata;
b39e625b
TM		 3246 struct nfs4_state_owner *sp = state->owner;
3247 struct rpc_task *task;
5138fde0
TM		 3248 struct rpc_message msg = {
3249 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3250 .rpc_cred = state->owner->so_cred,
3251 };
c970aa85
TM		 3252 struct rpc_task_setup task_setup_data = {
3253 .rpc_client = server->client,
5138fde0 3254 .rpc_message = &msg,
c970aa85 3255 .callback_ops = &nfs4_close_ops,
101070ca 3256 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3257 .flags = RPC_TASK_ASYNC,
3258 };
9512135d 3259 int status = -ENOMEM;
1da177e4 3260
fa940720
WAA		 3261 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3262 &task_setup_data.rpc_client, &msg);
3263
8535b2be 3264 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 3265 if (calldata == NULL)
9512135d 3266 goto out;
a9c92d6b 3267 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 3268 calldata->inode = state->inode;
1da177e4 3269 calldata->state = state;
4a35bd41 3270 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 3271 /* Serialization for the sequence id */
63f5f796
TM		 3272 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3273 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 3274 if (IS_ERR(calldata->arg.seqid))
9512135d 3275 goto out_free_calldata;
dc0b027d 3276 calldata->arg.fmode = 0;
4d796d75 3277 calldata->lr.arg.ld_private = &calldata->lr.ld_private;
516a6af6 3278 calldata->res.fattr = &calldata->fattr;
c1d51931 3279 calldata->res.seqid = calldata->arg.seqid;
516a6af6 3280 calldata->res.server = server;
cf805165 3281 calldata->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
1c5bd76d
TM		 3282 calldata->lr.roc = pnfs_roc(state->inode,
3283 &calldata->lr.arg, &calldata->lr.res, msg.rpc_cred);
3284 if (calldata->lr.roc) {
3285 calldata->arg.lr_args = &calldata->lr.arg;
3286 calldata->res.lr_res = &calldata->lr.res;
3287 }
643168c2 3288 nfs_sb_active(calldata->inode->i_sb);
9512135d 3289
1174dd1f
TM		 3290 msg.rpc_argp = &calldata->arg;
3291 msg.rpc_resp = &calldata->res;
c970aa85
TM		 3292 task_setup_data.callback_data = calldata;
3293 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 3294 if (IS_ERR(task))
3295 return PTR_ERR(task);
a49c3c77
TM		 3296 status = 0;
3297 if (wait)
3298 status = rpc_wait_for_completion_task(task);
b39e625b 3299 rpc_put_task(task);
a49c3c77 3300 return status;
9512135d
TM		 3301out_free_calldata:
3302 kfree(calldata);
3303out:
b39e625b
TM		 3304 nfs4_put_open_state(state);
3305 nfs4_put_state_owner(sp);
9512135d 3306 return status;
1da177e4
LT		 3307}
3308
2b484297 3309static struct inode *
5bc2afc2
TM		 3310nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3311 int open_flags, struct iattr *attr, int *opened)
1da177e4 3312{
1da177e4 3313 struct nfs4_state *state;
aa9c2669
DQ		 3314 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3315
3316 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 3317
565277f6 3318 /* Protect against concurrent sillydeletes */
5bc2afc2 3319 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 3320
3321 nfs4_label_release_security(label);
3322
f46e0bd3
TM		 3323 if (IS_ERR(state))
3324 return ERR_CAST(state);
275bb307 3325 return state->inode;
1da177e4
LT		 3326}
3327
1185a552 3328static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 3329{
3330 if (ctx->state == NULL)
3331 return;
3332 if (is_sync)
643168c2 3333 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 3334 else
643168c2 3335 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 3336}
1da177e4 3337
b944dba3
TM		 3338#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3339#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 3340#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 3341
1da177e4
LT		 3342static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3343{
8c61282f 3344 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 3345 struct nfs4_server_caps_arg args = {
3346 .fhandle = fhandle,
8c61282f 3347 .bitmask = bitmask,
43652ad5 3348 };
1da177e4
LT		 3349 struct nfs4_server_caps_res res = {};
3350 struct rpc_message msg = {
3351 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 3352 .rpc_argp = &args,
1da177e4
LT		 3353 .rpc_resp = &res,
3354 };
3355 int status;
3356
8c61282f
KM		 3357 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3358 FATTR4_WORD0_FH_EXPIRE_TYPE |
3359 FATTR4_WORD0_LINK_SUPPORT |
3360 FATTR4_WORD0_SYMLINK_SUPPORT |
3361 FATTR4_WORD0_ACLSUPPORT;
3362 if (minorversion)
3363 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3364
7c513058 3365 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3366 if (status == 0) {
b944dba3 3367 /* Sanity check the server answers */
8c61282f 3368 switch (minorversion) {
b944dba3
TM		 3369 case 0:
3370 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3371 res.attr_bitmask[2] = 0;
3372 break;
3373 case 1:
3374 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3375 break;
3376 case 2:
3377 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3378 }
1da177e4 3379 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 3380 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3381 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3382 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3383 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 3384 NFS_CAP_CTIME|NFS_CAP_MTIME|
3385 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 3386 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3387 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 3388 server->caps |= NFS_CAP_ACLS;
3389 if (res.has_links != 0)
3390 server->caps |= NFS_CAP_HARDLINKS;
3391 if (res.has_symlinks != 0)
3392 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 3393 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3394 server->caps |= NFS_CAP_FILEID;
3395 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3396 server->caps |= NFS_CAP_MODE;
3397 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3398 server->caps |= NFS_CAP_NLINK;
3399 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3400 server->caps |= NFS_CAP_OWNER;
3401 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3402 server->caps |= NFS_CAP_OWNER_GROUP;
3403 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3404 server->caps |= NFS_CAP_ATIME;
3405 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3406 server->caps |= NFS_CAP_CTIME;
3407 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3408 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 3409#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3410 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3411 server->caps |= NFS_CAP_SECURITY_LABEL;
3412#endif
3413 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3414 sizeof(server->attr_bitmask));
b944dba3 3415 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 3416
a65318bf
TM		 3417 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3418 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3419 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 3420 server->cache_consistency_bitmask[2] = 0;
8c61282f
KM		 3421 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3422 sizeof(server->exclcreat_bitmask));
1da177e4 3423 server->acl_bitmask = res.acl_bitmask;
264e6351 3424 server->fh_expire_type = res.fh_expire_type;
1da177e4 3425 }
cccef3b9 3426
1da177e4
LT		 3427 return status;
3428}
3429
55a97593 3430int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 3431{
3432 struct nfs4_exception exception = { };
3433 int err;
3434 do {
3435 err = nfs4_handle_exception(server,
3436 _nfs4_server_capabilities(server, fhandle),
3437 &exception);
3438 } while (exception.retry);
3439 return err;
3440}
3441
3442static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3443 struct nfs_fsinfo *info)
3444{
aa9c2669 3445 u32 bitmask[3];
1da177e4 3446 struct nfs4_lookup_root_arg args = {
aa9c2669 3447 .bitmask = bitmask,
1da177e4
LT		 3448 };
3449 struct nfs4_lookup_res res = {
3450 .server = server,
0e574af1 3451 .fattr = info->fattr,
1da177e4
LT		 3452 .fh = fhandle,
3453 };
3454 struct rpc_message msg = {
3455 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3456 .rpc_argp = &args,
3457 .rpc_resp = &res,
3458 };
008f55d0 3459
aa9c2669
DQ		 3460 bitmask[0] = nfs4_fattr_bitmap[0];
3461 bitmask[1] = nfs4_fattr_bitmap[1];
3462 /*
3463 * Process the label in the upcoming getfattr
3464 */
3465 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3466
0e574af1 3467 nfs_fattr_init(info->fattr);
7c513058 3468 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3469}
3470
3471static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3472 struct nfs_fsinfo *info)
3473{
3474 struct nfs4_exception exception = { };
3475 int err;
3476 do {
fb8a5ba8 3477 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3478 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3479 switch (err) {
3480 case 0:
3481 case -NFS4ERR_WRONGSEC:
05e9cfb4 3482 goto out;
fb8a5ba8
BS		 3483 default:
3484 err = nfs4_handle_exception(server, err, &exception);
3485 }
1da177e4 3486 } while (exception.retry);
05e9cfb4 3487out:
1da177e4
LT		 3488 return err;
3489}
3490
8f70e95f
BS		 3491static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3492 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3493{
c2190661
TM		 3494 struct rpc_auth_create_args auth_args = {
3495 .pseudoflavor = flavor,
3496 };
8f70e95f
BS		 3497 struct rpc_auth *auth;
3498 int ret;
3499
c2190661 3500 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3501 if (IS_ERR(auth)) {
75bc8821 3502 ret = -EACCES;
8f70e95f
BS		 3503 goto out;
3504 }
3505 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3506out:
3507 return ret;
3508}
3509
9a744ba3
CL		 3510/*
3511 * Retry pseudoroot lookup with various security flavors. We do this when:
3512 *
3513 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3514 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3515 *
3516 * Returns zero on success, or a negative NFS4ERR value, or a
3517 * negative errno value.
3518 */
801a16dc 3519static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3520 struct nfs_fsinfo *info)
1da177e4 3521{
9a744ba3
CL		 3522 /* Per 3530bis 15.33.5 */
3523 static const rpc_authflavor_t flav_array[] = {
3524 RPC_AUTH_GSS_KRB5P,
3525 RPC_AUTH_GSS_KRB5I,
3526 RPC_AUTH_GSS_KRB5,
c4eafe11 3527 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3528 RPC_AUTH_NULL,
3529 };
3530 int status = -EPERM;
3531 size_t i;
6a1a1e34 3532
4d4b69dd
WAA		 3533 if (server->auth_info.flavor_len > 0) {
3534 /* try each flavor specified by user */
3535 for (i = 0; i < server->auth_info.flavor_len; i++) {
3536 status = nfs4_lookup_root_sec(server, fhandle, info,
3537 server->auth_info.flavors[i]);
3538 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3539 continue;
3540 break;
3541 }
3542 } else {
3543 /* no flavors specified by user, try default list */
3544 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3545 status = nfs4_lookup_root_sec(server, fhandle, info,
3546 flav_array[i]);
3547 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3548 continue;
3549 break;
3550 }
8f70e95f 3551 }
9a744ba3 3552
fb8a5ba8
BS		 3553 /*
3554 * -EACCESS could mean that the user doesn't have correct permissions
3555 * to access the mount. It could also mean that we tried to mount
3556 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3557 * existing mount programs don't handle -EACCES very well so it should
3558 * be mapped to -EPERM instead.
3559 */
3560 if (status == -EACCES)
3561 status = -EPERM;
801a16dc
BS		 3562 return status;
3563}
3564
2ed4b95b
CL		 3565/**
3566 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3567 * @server: initialized nfs_server handle
3568 * @fhandle: we fill in the pseudo-fs root file handle
3569 * @info: we fill in an FSINFO struct
5e6b1990 3570 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3571 *
3572 * Returns zero on success, or a negative errno.
801a16dc 3573 */
3028eb2b 3574int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3575 struct nfs_fsinfo *info,
3576 bool auth_probe)
801a16dc 3577{
c7757074 3578 int status = 0;
2ed4b95b 3579
c7757074 3580 if (!auth_probe)
5e6b1990 3581 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3582
3583 if (auth_probe || status == NFS4ERR_WRONGSEC)
698c937b
TM		 3584 status = server->nfs_client->cl_mvops->find_root_sec(server,
3585 fhandle, info);
2ed4b95b 3586
1da177e4
LT		 3587 if (status == 0)
3588 status = nfs4_server_capabilities(server, fhandle);
3589 if (status == 0)
3590 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3591
c12e87f4 3592 return nfs4_map_errors(status);
1da177e4
LT		 3593}
3594
bae36241
BS		 3595static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3596 struct nfs_fsinfo *info)
3597{
3598 int error;
3599 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3600 struct nfs4_label *label = NULL;
bae36241
BS		 3601
3602 error = nfs4_server_capabilities(server, mntfh);
3603 if (error < 0) {
3604 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3605 return error;
3606 }
3607
14c43f76
DQ		 3608 label = nfs4_label_alloc(server, GFP_KERNEL);
3609 if (IS_ERR(label))
3610 return PTR_ERR(label);
3611
1775fd3e 3612 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3613 if (error < 0) {
3614 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3615 goto err_free_label;
bae36241
BS		 3616 }
3617
3618 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3619 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3620 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3621
14c43f76
DQ		 3622err_free_label:
3623 nfs4_label_free(label);
3624
bae36241
BS		 3625 return error;
3626}
3627
6b97fd3d
MN		 3628/*
3629 * Get locations and (maybe) other attributes of a referral.
3630 * Note that we'll actually follow the referral later when
3631 * we detect fsid mismatch in inode revalidation
3632 */
f05d147f
BS		 3633static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3634 const struct qstr *name, struct nfs_fattr *fattr,
3635 struct nfs_fh *fhandle)
6b97fd3d
MN		 3636{
3637 int status = -ENOMEM;
3638 struct page *page = NULL;
3639 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3640
3641 page = alloc_page(GFP_KERNEL);
3642 if (page == NULL)
3643 goto out;
3644 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3645 if (locations == NULL)
3646 goto out;
3647
f05d147f 3648 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3649 if (status != 0)
3650 goto out;
519ae255
CL		 3651
3652 /*
3653 * If the fsid didn't change, this is a migration event, not a
3654 * referral. Cause us to drop into the exception handler, which
3655 * will kick off migration recovery.
3656 */
6b97fd3d 3657 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3658 dprintk("%s: server did not return a different fsid for"
3659 " a referral at %s\n", __func__, name->name);
519ae255 3660 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3661 goto out;
3662 }
533eb461
AA		 3663 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3664 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3665
533eb461 3666 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3667 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3668 memset(fhandle, 0, sizeof(struct nfs_fh));
3669out:
3670 if (page)
3671 __free_page(page);
5d7ca35a 3672 kfree(locations);
6b97fd3d
MN		 3673 return status;
3674}
3675
1775fd3e
DQ		 3676static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3677 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3678{
3679 struct nfs4_getattr_arg args = {
3680 .fh = fhandle,
3681 .bitmask = server->attr_bitmask,
3682 };
3683 struct nfs4_getattr_res res = {
3684 .fattr = fattr,
1775fd3e 3685 .label = label,
1da177e4
LT		 3686 .server = server,
3687 };
3688 struct rpc_message msg = {
3689 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3690 .rpc_argp = &args,
3691 .rpc_resp = &res,
3692 };
aa9c2669
DQ		 3693
3694 args.bitmask = nfs4_bitmask(server, label);
3695
0e574af1 3696 nfs_fattr_init(fattr);
7c513058 3697 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3698}
3699
1775fd3e
DQ		 3700static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3701 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3702{
3703 struct nfs4_exception exception = { };
3704 int err;
3705 do {
b5f875a9
TM		 3706 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3707 trace_nfs4_getattr(server, fhandle, fattr, err);
3708 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3709 &exception);
3710 } while (exception.retry);
3711 return err;
3712}
3713
3714/*
3715 * The file is not closed if it is opened due to the a request to change
3716 * the size of the file. The open call will not be needed once the
3717 * VFS layer lookup-intents are implemented.
3718 *
3719 * Close is called when the inode is destroyed.
3720 * If we haven't opened the file for O_WRONLY, we
3721 * need to in the size_change case to obtain a stateid.
3722 *
3723 * Got race?
3724 * Because OPEN is always done by name in nfsv4, it is
3725 * possible that we opened a different file by the same
3726 * name. We can recognize this race condition, but we
3727 * can't do anything about it besides returning an error.
3728 *
3729 * This will be fixed with VFS changes (lookup-intent).
3730 */
3731static int
3732nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3733 struct iattr *sattr)
3734{
2b0143b5 3735 struct inode *inode = d_inode(dentry);
659bfcd6 3736 struct rpc_cred *cred = NULL;
29b59f94 3737 struct nfs_open_context *ctx = NULL;
14c43f76 3738 struct nfs4_label *label = NULL;
1da177e4
LT		 3739 int status;
3740
88ac815c
PT		 3741 if (pnfs_ld_layoutret_on_setattr(inode) &&
3742 sattr->ia_valid & ATTR_SIZE &&
3743 sattr->ia_size < i_size_read(inode))
24028672 3744 pnfs_commit_and_return_layout(inode);
8a1636c4 3745
0e574af1 3746 nfs_fattr_init(fattr);
1da177e4 3747
2669940d
AA		 3748 /* Deal with open(O_TRUNC) */
3749 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3750 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3751
3752 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3753 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3754 return 0;
3755
d530838b 3756 /* Search for an existing open(O_WRITE) file */
659bfcd6 3757 if (sattr->ia_valid & ATTR_FILE) {
659bfcd6
TM		 3758
3759 ctx = nfs_file_open_context(sattr->ia_file);
29b59f94 3760 if (ctx)
504e5189 3761 cred = ctx->cred;
659bfcd6 3762 }
08e9eac4 3763
14c43f76
DQ		 3764 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3765 if (IS_ERR(label))
3766 return PTR_ERR(label);
3767
29b59f94 3768 status = nfs4_do_setattr(inode, cred, fattr, sattr, ctx, NULL, label);
aa9c2669 3769 if (status == 0) {
f044636d 3770 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3771 nfs_setsecurity(inode, fattr, label);
3772 }
14c43f76 3773 nfs4_label_free(label);
1da177e4
LT		 3774 return status;
3775}
3776
0c2e53f1
TM		 3777static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3778 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3779 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3780{
0c2e53f1 3781 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3782 int status;
3783 struct nfs4_lookup_arg args = {
3784 .bitmask = server->attr_bitmask,
0c2e53f1 3785 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3786 .name = name,
3787 };
3788 struct nfs4_lookup_res res = {
3789 .server = server,
3790 .fattr = fattr,
aa9c2669 3791 .label = label,
2b3de441
DH		 3792 .fh = fhandle,
3793 };
3794 struct rpc_message msg = {
3795 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3796 .rpc_argp = &args,
3797 .rpc_resp = &res,
3798 };
3799
aa9c2669
DQ		 3800 args.bitmask = nfs4_bitmask(server, label);
3801
2b3de441
DH		 3802 nfs_fattr_init(fattr);
3803
1da177e4 3804 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3805 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3806 dprintk("NFS reply lookup: %d\n", status);
3807 return status;
3808}
3809
72de53ec 3810static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3811{
7ebb9315 3812 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3813 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3814 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3815 fattr->nlink = 2;
3816}
3817
72de53ec 3818static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
beffb8fe 3819 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3820 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3821{
3822 struct nfs4_exception exception = { };
72de53ec 3823 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3824 int err;
3825 do {
1775fd3e 3826 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3827 trace_nfs4_lookup(dir, name, err);
72de53ec 3828 switch (err) {
08ef7bd3 3829 case -NFS4ERR_BADNAME:
72de53ec
BS		 3830 err = -ENOENT;
3831 goto out;
0c2e53f1 3832 case -NFS4ERR_MOVED:
f05d147f 3833 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3834 if (err == -NFS4ERR_MOVED)
3835 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3836 goto out;
0c2e53f1 3837 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3838 err = -EPERM;
3839 if (client != *clnt)
3840 goto out;
66b06860 3841 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3842 if (IS_ERR(client))
3843 return PTR_ERR(client);
3844
3845 exception.retry = 1;
3846 break;
3847 default:
3848 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3849 }
1da177e4 3850 } while (exception.retry);
72de53ec
BS		 3851
3852out:
3853 if (err == 0)
3854 *clnt = client;
3855 else if (client != *clnt)
3856 rpc_shutdown_client(client);
3857
1da177e4
LT		 3858 return err;
3859}
3860
beffb8fe 3861static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1775fd3e
DQ		 3862 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3863 struct nfs4_label *label)
72de53ec
BS		 3864{
3865 int status;
3866 struct rpc_clnt *client = NFS_CLIENT(dir);
3867
1775fd3e 3868 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3869 if (client != NFS_CLIENT(dir)) {
3870 rpc_shutdown_client(client);
3871 nfs_fixup_secinfo_attributes(fattr);
3872 }
3873 return status;
3874}
3875
f05d147f 3876struct rpc_clnt *
beffb8fe 3877nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name,
f05d147f
BS		 3878 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3879{
b72888cb 3880 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3881 int status;
f05d147f 3882
1775fd3e 3883 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3884 if (status < 0)
f05d147f 3885 return ERR_PTR(status);
b72888cb 3886 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3887}
3888
1da177e4
LT		 3889static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3890{
76b32999 3891 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3892 struct nfs4_accessargs args = {
3893 .fh = NFS_FH(inode),
a4980e78 3894 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3895 };
3896 struct nfs4_accessres res = {
3897 .server = server,
1da177e4 3898 };
1da177e4
LT		 3899 struct rpc_message msg = {
3900 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3901 .rpc_argp = &args,
3902 .rpc_resp = &res,
3903 .rpc_cred = entry->cred,
3904 };
3905 int mode = entry->mask;
aa9c2669 3906 int status = 0;
1da177e4
LT		 3907
3908 /*
3909 * Determine which access bits we want to ask for...
3910 */
3911 if (mode & MAY_READ)
3912 args.access |= NFS4_ACCESS_READ;
3913 if (S_ISDIR(inode->i_mode)) {
3914 if (mode & MAY_WRITE)
3915 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3916 if (mode & MAY_EXEC)
3917 args.access |= NFS4_ACCESS_LOOKUP;
3918 } else {
3919 if (mode & MAY_WRITE)
3920 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3921 if (mode & MAY_EXEC)
3922 args.access |= NFS4_ACCESS_EXECUTE;
3923 }
c407d41a
TM		 3924
3925 res.fattr = nfs_alloc_fattr();
3926 if (res.fattr == NULL)
3927 return -ENOMEM;
3928
7c513058 3929 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3930 if (!status) {
6168f62c 3931 nfs_access_set_mask(entry, res.access);
c407d41a 3932 nfs_refresh_inode(inode, res.fattr);
1da177e4 3933 }
c407d41a 3934 nfs_free_fattr(res.fattr);
1da177e4
LT		 3935 return status;
3936}
3937
3938static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3939{
3940 struct nfs4_exception exception = { };
3941 int err;
3942 do {
c1578b76
TM		 3943 err = _nfs4_proc_access(inode, entry);
3944 trace_nfs4_access(inode, err);
3945 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3946 &exception);
3947 } while (exception.retry);
3948 return err;
3949}
3950
3951/*
3952 * TODO: For the time being, we don't try to get any attributes
3953 * along with any of the zero-copy operations READ, READDIR,
3954 * READLINK, WRITE.
3955 *
3956 * In the case of the first three, we want to put the GETATTR
3957 * after the read-type operation -- this is because it is hard
3958 * to predict the length of a GETATTR response in v4, and thus
3959 * align the READ data correctly. This means that the GETATTR
3960 * may end up partially falling into the page cache, and we should
3961 * shift it into the 'tail' of the xdr_buf before processing.
3962 * To do this efficiently, we need to know the total length
3963 * of data received, which doesn't seem to be available outside
3964 * of the RPC layer.
3965 *
3966 * In the case of WRITE, we also want to put the GETATTR after
3967 * the operation -- in this case because we want to make sure
140150db 3968 * we get the post-operation mtime and size.
1da177e4
LT		 3969 *
3970 * Both of these changes to the XDR layer would in fact be quite
3971 * minor, but I decided to leave them for a subsequent patch.
3972 */
3973static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3974 unsigned int pgbase, unsigned int pglen)
3975{
3976 struct nfs4_readlink args = {
3977 .fh = NFS_FH(inode),
3978 .pgbase = pgbase,
3979 .pglen = pglen,
3980 .pages = &page,
3981 };
f50c7000 3982 struct nfs4_readlink_res res;
1da177e4
LT		 3983 struct rpc_message msg = {
3984 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3985 .rpc_argp = &args,
f50c7000 3986 .rpc_resp = &res,
1da177e4
LT		 3987 };
3988
7c513058 3989 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3990}
3991
3992static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3993 unsigned int pgbase, unsigned int pglen)
3994{
3995 struct nfs4_exception exception = { };
3996 int err;
3997 do {
c1578b76
TM		 3998 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3999 trace_nfs4_readlink(inode, err);
4000 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 4001 &exception);
4002 } while (exception.retry);
4003 return err;
4004}
4005
1da177e4 4006/*
8867fe58 4007 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 4008 */
1da177e4
LT		 4009static int
4010nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 4011 int flags)
1da177e4 4012{
aa9c2669 4013 struct nfs4_label l, *ilabel = NULL;
8867fe58 4014 struct nfs_open_context *ctx;
1da177e4 4015 struct nfs4_state *state;
1da177e4
LT		 4016 int status = 0;
4017
532d4def 4018 ctx = alloc_nfs_open_context(dentry, FMODE_READ, NULL);
8867fe58
MS		 4019 if (IS_ERR(ctx))
4020 return PTR_ERR(ctx);
4021
aa9c2669
DQ		 4022 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
4023
a8a5da99 4024 sattr->ia_mode &= ~current_umask();
c5c3fb5f 4025 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 4026 if (IS_ERR(state)) {
4027 status = PTR_ERR(state);
c0204fd2 4028 goto out;
1da177e4 4029 }
1da177e4 4030out:
aa9c2669 4031 nfs4_label_release_security(ilabel);
8867fe58 4032 put_nfs_open_context(ctx);
1da177e4
LT		 4033 return status;
4034}
4035
beffb8fe 4036static int _nfs4_proc_remove(struct inode *dir, const struct qstr *name)
1da177e4 4037{
16e42959 4038 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 4039 struct nfs_removeargs args = {
1da177e4 4040 .fh = NFS_FH(dir),
26fe5750 4041 .name = *name,
16e42959 4042 };
4fdc17b2 4043 struct nfs_removeres res = {
16e42959 4044 .server = server,
1da177e4 4045 };
1da177e4 4046 struct rpc_message msg = {
4fdc17b2
TM		 4047 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
4048 .rpc_argp = &args,
4049 .rpc_resp = &res,
1da177e4 4050 };
778d2817 4051 int status;
1da177e4 4052
7c513058 4053 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 4054 if (status == 0)
16e42959 4055 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 4056 return status;
4057}
4058
beffb8fe 4059static int nfs4_proc_remove(struct inode *dir, const struct qstr *name)
1da177e4
LT		 4060{
4061 struct nfs4_exception exception = { };
4062 int err;
4063 do {
078ea3df
TM		 4064 err = _nfs4_proc_remove(dir, name);
4065 trace_nfs4_remove(dir, name, err);
4066 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4067 &exception);
4068 } while (exception.retry);
4069 return err;
4070}
4071
e4eff1a6 4072static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 4073{
e4eff1a6
TM		 4074 struct nfs_server *server = NFS_SERVER(dir);
4075 struct nfs_removeargs *args = msg->rpc_argp;
4076 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 4077
e4eff1a6 4078 res->server = server;
1da177e4 4079 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 4080 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 4081
4082 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 4083}
4084
34e137cc
BS		 4085static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
4086{
884be175 4087 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb),
d9afbd1b
TM		 4088 &data->args.seq_args,
4089 &data->res.seq_res,
4090 task);
1da177e4
LT		 4091}
4092
e4eff1a6 4093static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 4094{
078ea3df
TM		 4095 struct nfs_unlinkdata *data = task->tk_calldata;
4096 struct nfs_removeres *res = &data->res;
e4eff1a6 4097
14516c3a
TM		 4098 if (!nfs4_sequence_done(task, &res->seq_res))
4099 return 0;
8478eaa1
N		 4100 if (nfs4_async_handle_error(task, res->server, NULL,
4101 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 4102 return 0;
4103 update_changeattr(dir, &res->cinfo);
e4eff1a6 4104 return 1;
1da177e4
LT		 4105}
4106
d3d4152a
JL		 4107static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
4108{
4109 struct nfs_server *server = NFS_SERVER(dir);
4110 struct nfs_renameargs *arg = msg->rpc_argp;
4111 struct nfs_renameres *res = msg->rpc_resp;
4112
4113 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 4114 res->server = server;
a9c92d6b 4115 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 4116}
4117
c6bfa1a1
BS		 4118static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
4119{
d9afbd1b
TM		 4120 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
4121 &data->args.seq_args,
4122 &data->res.seq_res,
4123 task);
d3d4152a
JL		 4124}
4125
4126static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
4127 struct inode *new_dir)
4128{
fbc6f7c2
TM		 4129 struct nfs_renamedata *data = task->tk_calldata;
4130 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 4131
4132 if (!nfs4_sequence_done(task, &res->seq_res))
4133 return 0;
8478eaa1 4134 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 4135 return 0;
4136
4137 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 4138 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 4139 return 1;
4140}
4141
beffb8fe 4142static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4 4143{
91ba2eee 4144 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 4145 struct nfs4_link_arg arg = {
4146 .fh = NFS_FH(inode),
4147 .dir_fh = NFS_FH(dir),
4148 .name = name,
91ba2eee
TM		 4149 .bitmask = server->attr_bitmask,
4150 };
91ba2eee
TM		 4151 struct nfs4_link_res res = {
4152 .server = server,
1775fd3e 4153 .label = NULL,
1da177e4 4154 };
1da177e4
LT		 4155 struct rpc_message msg = {
4156 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
4157 .rpc_argp = &arg,
91ba2eee 4158 .rpc_resp = &res,
1da177e4 4159 };
136f2627
TM		 4160 int status = -ENOMEM;
4161
4162 res.fattr = nfs_alloc_fattr();
778d2817 4163 if (res.fattr == NULL)
136f2627 4164 goto out;
1da177e4 4165
14c43f76
DQ		 4166 res.label = nfs4_label_alloc(server, GFP_KERNEL);
4167 if (IS_ERR(res.label)) {
4168 status = PTR_ERR(res.label);
4169 goto out;
4170 }
aa9c2669 4171 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 4172
7c513058 4173 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 4174 if (!status) {
4175 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 4176 status = nfs_post_op_update_inode(inode, res.fattr);
4177 if (!status)
4178 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 4179 }
14c43f76
DQ		 4180
4181
4182 nfs4_label_free(res.label);
4183
136f2627 4184out:
136f2627 4185 nfs_free_fattr(res.fattr);
1da177e4
LT		 4186 return status;
4187}
4188
beffb8fe 4189static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4
LT		 4190{
4191 struct nfs4_exception exception = { };
4192 int err;
4193 do {
4194 err = nfs4_handle_exception(NFS_SERVER(inode),
4195 _nfs4_proc_link(inode, dir, name),
4196 &exception);
4197 } while (exception.retry);
4198 return err;
4199}
4200
57dc9a57
TM		 4201struct nfs4_createdata {
4202 struct rpc_message msg;
4203 struct nfs4_create_arg arg;
4204 struct nfs4_create_res res;
4205 struct nfs_fh fh;
4206 struct nfs_fattr fattr;
1775fd3e 4207 struct nfs4_label *label;
57dc9a57
TM		 4208};
4209
4210static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
beffb8fe 4211 const struct qstr *name, struct iattr *sattr, u32 ftype)
57dc9a57
TM		 4212{
4213 struct nfs4_createdata *data;
4214
4215 data = kzalloc(sizeof(*data), GFP_KERNEL);
4216 if (data != NULL) {
4217 struct nfs_server *server = NFS_SERVER(dir);
4218
14c43f76
DQ		 4219 data->label = nfs4_label_alloc(server, GFP_KERNEL);
4220 if (IS_ERR(data->label))
4221 goto out_free;
4222
57dc9a57
TM		 4223 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
4224 data->msg.rpc_argp = &data->arg;
4225 data->msg.rpc_resp = &data->res;
4226 data->arg.dir_fh = NFS_FH(dir);
4227 data->arg.server = server;
4228 data->arg.name = name;
4229 data->arg.attrs = sattr;
4230 data->arg.ftype = ftype;
aa9c2669 4231 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 4232 data->res.server = server;
4233 data->res.fh = &data->fh;
4234 data->res.fattr = &data->fattr;
1775fd3e 4235 data->res.label = data->label;
57dc9a57 4236 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 4237 }
4238 return data;
14c43f76
DQ		 4239out_free:
4240 kfree(data);
4241 return NULL;
57dc9a57
TM		 4242}
4243
4244static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
4245{
7c513058 4246 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 4247 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 4248 if (status == 0) {
4249 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 4250 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 4251 }
4252 return status;
4253}
4254
4255static void nfs4_free_createdata(struct nfs4_createdata *data)
4256{
14c43f76 4257 nfs4_label_free(data->label);
57dc9a57
TM		 4258 kfree(data);
4259}
4260
4f390c15 4261static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 4262 struct page *page, unsigned int len, struct iattr *sattr,
4263 struct nfs4_label *label)
1da177e4 4264{
57dc9a57
TM		 4265 struct nfs4_createdata *data;
4266 int status = -ENAMETOOLONG;
1da177e4 4267
94a6d753 4268 if (len > NFS4_MAXPATHLEN)
57dc9a57 4269 goto out;
4f390c15 4270
57dc9a57
TM		 4271 status = -ENOMEM;
4272 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
4273 if (data == NULL)
4274 goto out;
4275
4276 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
4277 data->arg.u.symlink.pages = &page;
4278 data->arg.u.symlink.len = len;
1775fd3e 4279 data->arg.label = label;
1da177e4 4280
57dc9a57
TM		 4281 status = nfs4_do_create(dir, dentry, data);
4282
4283 nfs4_free_createdata(data);
4284out:
1da177e4
LT		 4285 return status;
4286}
4287
4f390c15 4288static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 4289 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 4290{
4291 struct nfs4_exception exception = { };
aa9c2669 4292 struct nfs4_label l, *label = NULL;
1da177e4 4293 int err;
aa9c2669
DQ		 4294
4295 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4296
1da177e4 4297 do {
078ea3df
TM		 4298 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4299 trace_nfs4_symlink(dir, &dentry->d_name, err);
4300 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4301 &exception);
4302 } while (exception.retry);
aa9c2669
DQ		 4303
4304 nfs4_label_release_security(label);
1da177e4
LT		 4305 return err;
4306}
4307
4308static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 4309 struct iattr *sattr, struct nfs4_label *label)
1da177e4 4310{
57dc9a57
TM		 4311 struct nfs4_createdata *data;
4312 int status = -ENOMEM;
1da177e4 4313
57dc9a57
TM		 4314 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4315 if (data == NULL)
4316 goto out;
4317
1775fd3e 4318 data->arg.label = label;
57dc9a57
TM		 4319 status = nfs4_do_create(dir, dentry, data);
4320
4321 nfs4_free_createdata(data);
4322out:
1da177e4
LT		 4323 return status;
4324}
4325
4326static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4327 struct iattr *sattr)
4328{
4329 struct nfs4_exception exception = { };
aa9c2669 4330 struct nfs4_label l, *label = NULL;
1da177e4 4331 int err;
a8a5da99 4332
aa9c2669
DQ		 4333 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4334
a8a5da99 4335 sattr->ia_mode &= ~current_umask();
1da177e4 4336 do {
078ea3df
TM		 4337 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4338 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4339 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4340 &exception);
4341 } while (exception.retry);
aa9c2669
DQ		 4342 nfs4_label_release_security(label);
4343
1da177e4
LT		 4344 return err;
4345}
4346
4347static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4348 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4 4349{
2b0143b5 4350 struct inode *dir = d_inode(dentry);
1da177e4
LT		 4351 struct nfs4_readdir_arg args = {
4352 .fh = NFS_FH(dir),
56e4ebf8 4353 .pages = pages,
1da177e4
LT		 4354 .pgbase = 0,
4355 .count = count,
2b0143b5 4356 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 4357 .plus = plus,
1da177e4
LT		 4358 };
4359 struct nfs4_readdir_res res;
4360 struct rpc_message msg = {
4361 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4362 .rpc_argp = &args,
4363 .rpc_resp = &res,
4364 .rpc_cred = cred,
4365 };
4366 int status;
4367
6de1472f
AV		 4368 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4369 dentry,
eadf4598 4370 (unsigned long long)cookie);
c3f52af3 4371 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 4372 res.pgbase = args.pgbase;
7c513058 4373 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 4374 if (status >= 0) {
c3f52af3 4375 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 4376 status += args.pgbase;
4377 }
c4812998
TM		 4378
4379 nfs_invalidate_atime(dir);
4380
3110ff80 4381 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 4382 return status;
4383}
4384
4385static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4386 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 4387{
4388 struct nfs4_exception exception = { };
4389 int err;
4390 do {
c1578b76
TM		 4391 err = _nfs4_proc_readdir(dentry, cred, cookie,
4392 pages, count, plus);
2b0143b5
DH		 4393 trace_nfs4_readdir(d_inode(dentry), err);
4394 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 4395 &exception);
4396 } while (exception.retry);
4397 return err;
4398}
4399
4400static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 4401 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 4402{
57dc9a57
TM		 4403 struct nfs4_createdata *data;
4404 int mode = sattr->ia_mode;
4405 int status = -ENOMEM;
1da177e4 4406
57dc9a57
TM		 4407 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4408 if (data == NULL)
4409 goto out;
4410
1da177e4 4411 if (S_ISFIFO(mode))
57dc9a57 4412 data->arg.ftype = NF4FIFO;
1da177e4 4413 else if (S_ISBLK(mode)) {
57dc9a57
TM		 4414 data->arg.ftype = NF4BLK;
4415 data->arg.u.device.specdata1 = MAJOR(rdev);
4416 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 4417 }
4418 else if (S_ISCHR(mode)) {
57dc9a57
TM		 4419 data->arg.ftype = NF4CHR;
4420 data->arg.u.device.specdata1 = MAJOR(rdev);
4421 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 4422 } else if (!S_ISSOCK(mode)) {
4423 status = -EINVAL;
4424 goto out_free;
1da177e4 4425 }
1775fd3e 4426
aa9c2669 4427 data->arg.label = label;
57dc9a57 4428 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 4429out_free:
57dc9a57
TM		 4430 nfs4_free_createdata(data);
4431out:
1da177e4
LT		 4432 return status;
4433}
4434
4435static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4436 struct iattr *sattr, dev_t rdev)
4437{
4438 struct nfs4_exception exception = { };
aa9c2669 4439 struct nfs4_label l, *label = NULL;
1da177e4 4440 int err;
a8a5da99 4441
aa9c2669
DQ		 4442 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4443
a8a5da99 4444 sattr->ia_mode &= ~current_umask();
1da177e4 4445 do {
078ea3df
TM		 4446 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4447 trace_nfs4_mknod(dir, &dentry->d_name, err);
4448 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4449 &exception);
4450 } while (exception.retry);
aa9c2669
DQ		 4451
4452 nfs4_label_release_security(label);
4453
1da177e4
LT		 4454 return err;
4455}
4456
4457static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4458 struct nfs_fsstat *fsstat)
4459{
4460 struct nfs4_statfs_arg args = {
4461 .fh = fhandle,
4462 .bitmask = server->attr_bitmask,
4463 };
24ad148a
BH		 4464 struct nfs4_statfs_res res = {
4465 .fsstat = fsstat,
4466 };
1da177e4
LT		 4467 struct rpc_message msg = {
4468 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4469 .rpc_argp = &args,
24ad148a 4470 .rpc_resp = &res,
1da177e4
LT		 4471 };
4472
0e574af1 4473 nfs_fattr_init(fsstat->fattr);
7c513058 4474 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4475}
4476
4477static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4478{
4479 struct nfs4_exception exception = { };
4480 int err;
4481 do {
4482 err = nfs4_handle_exception(server,
4483 _nfs4_proc_statfs(server, fhandle, fsstat),
4484 &exception);
4485 } while (exception.retry);
4486 return err;
4487}
4488
4489static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4490 struct nfs_fsinfo *fsinfo)
4491{
4492 struct nfs4_fsinfo_arg args = {
4493 .fh = fhandle,
4494 .bitmask = server->attr_bitmask,
4495 };
3dda5e43
BH		 4496 struct nfs4_fsinfo_res res = {
4497 .fsinfo = fsinfo,
4498 };
1da177e4
LT		 4499 struct rpc_message msg = {
4500 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4501 .rpc_argp = &args,
3dda5e43 4502 .rpc_resp = &res,
1da177e4
LT		 4503 };
4504
7c513058 4505 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4506}
4507
4508static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4509{
4510 struct nfs4_exception exception = { };
83ca7f5a 4511 unsigned long now = jiffies;
1da177e4
LT		 4512 int err;
4513
4514 do {
83ca7f5a 4515 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4516 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a 4517 if (err == 0) {
fb10fb67
TM		 4518 nfs4_set_lease_period(server->nfs_client,
4519 fsinfo->lease_time * HZ,
4520 now);
83ca7f5a
CL		 4521 break;
4522 }
4523 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4524 } while (exception.retry);
4525 return err;
4526}
4527
4528static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4529{
e38eb650
BS		 4530 int error;
4531
0e574af1 4532 nfs_fattr_init(fsinfo->fattr);
e38eb650 4533 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4534 if (error == 0) {
4535 /* block layout checks this! */
4536 server->pnfs_blksize = fsinfo->blksize;
ca440c38 4537 set_pnfs_layoutdriver(server, fhandle, fsinfo);
dc182549 4538 }
e38eb650
BS		 4539
4540 return error;
1da177e4
LT		 4541}
4542
4543static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4544 struct nfs_pathconf *pathconf)
4545{
4546 struct nfs4_pathconf_arg args = {
4547 .fh = fhandle,
4548 .bitmask = server->attr_bitmask,
4549 };
d45b2989
BH		 4550 struct nfs4_pathconf_res res = {
4551 .pathconf = pathconf,
4552 };
1da177e4
LT		 4553 struct rpc_message msg = {
4554 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4555 .rpc_argp = &args,
d45b2989 4556 .rpc_resp = &res,
1da177e4
LT		 4557 };
4558
4559 /* None of the pathconf attributes are mandatory to implement */
4560 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4561 memset(pathconf, 0, sizeof(*pathconf));
4562 return 0;
4563 }
4564
0e574af1 4565 nfs_fattr_init(pathconf->fattr);
7c513058 4566 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4567}
4568
4569static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4570 struct nfs_pathconf *pathconf)
4571{
4572 struct nfs4_exception exception = { };
4573 int err;
4574
4575 do {
4576 err = nfs4_handle_exception(server,
4577 _nfs4_proc_pathconf(server, fhandle, pathconf),
4578 &exception);
4579 } while (exception.retry);
4580 return err;
4581}
4582
5521abfd 4583int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4584 const struct nfs_open_context *ctx,
4585 const struct nfs_lock_context *l_ctx,
4586 fmode_t fmode)
4587{
17393475 4588 return nfs4_select_rw_stateid(ctx->state, fmode, l_ctx, stateid, NULL);
9b206149
TM		 4589}
4590EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4591
5521abfd
TM		 4592static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4593 const struct nfs_open_context *ctx,
4594 const struct nfs_lock_context *l_ctx,
4595 fmode_t fmode)
4596{
4597 nfs4_stateid current_stateid;
4598
e1253be0
TM		 4599 /* If the current stateid represents a lost lock, then exit */
4600 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4601 return true;
5521abfd
TM		 4602 return nfs4_stateid_match(stateid, &current_stateid);
4603}
4604
4605static bool nfs4_error_stateid_expired(int err)
4606{
4607 switch (err) {
4608 case -NFS4ERR_DELEG_REVOKED:
4609 case -NFS4ERR_ADMIN_REVOKED:
4610 case -NFS4ERR_BAD_STATEID:
4611 case -NFS4ERR_STALE_STATEID:
4612 case -NFS4ERR_OLD_STATEID:
4613 case -NFS4ERR_OPENMODE:
4614 case -NFS4ERR_EXPIRED:
4615 return true;
4616 }
4617 return false;
4618}
4619
d45f60c6 4620static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4621{
d45f60c6 4622 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4623
d45f60c6 4624 trace_nfs4_read(hdr, task->tk_status);
9c27869d
TM		 4625 if (task->tk_status < 0) {
4626 struct nfs4_exception exception = {
4627 .inode = hdr->inode,
4628 .state = hdr->args.context->state,
4629 .stateid = &hdr->args.stateid,
4630 };
4631 task->tk_status = nfs4_async_handle_exception(task,
4632 server, task->tk_status, &exception);
4633 if (exception.retry) {
4634 rpc_restart_call_prepare(task);
4635 return -EAGAIN;
4636 }
1da177e4 4637 }
8850df99 4638
1da177e4 4639 if (task->tk_status > 0)
d45f60c6 4640 renew_lease(server, hdr->timestamp);
ec06c096 4641 return 0;
1da177e4
LT		 4642}
4643
5521abfd 4644static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4645 struct nfs_pgio_args *args)
5521abfd
TM		 4646{
4647
4648 if (!nfs4_error_stateid_expired(task->tk_status) ||
4649 nfs4_stateid_is_current(&args->stateid,
4650 args->context,
4651 args->lock_context,
4652 FMODE_READ))
4653 return false;
4654 rpc_restart_call_prepare(task);
4655 return true;
4656}
4657
d45f60c6 4658static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4659{
4660
4661 dprintk("--> %s\n", __func__);
4662
d45f60c6 4663 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4664 return -EAGAIN;
d45f60c6 4665 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4666 return -EAGAIN;
bfc505de
TM		 4667 if (task->tk_status > 0)
4668 nfs_invalidate_atime(hdr->inode);
d45f60c6
WAA		 4669 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4670 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4671}
4672
d45f60c6
WAA		 4673static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4674 struct rpc_message *msg)
1da177e4 4675{
d45f60c6 4676 hdr->timestamp = jiffies;
ca857cc1
TM		 4677 if (!hdr->pgio_done_cb)
4678 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4679 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4680 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4681}
4682
d45f60c6
WAA		 4683static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4684 struct nfs_pgio_header *hdr)
ea7c3303 4685{
d45f60c6
WAA		 4686 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4687 &hdr->args.seq_args,
4688 &hdr->res.seq_res,
9b206149 4689 task))
ef1820f9 4690 return 0;
d45f60c6
WAA		 4691 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4692 hdr->args.lock_context,
4693 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4694 return -EIO;
d45f60c6 4695 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4696 return -EIO;
4697 return 0;
1da177e4
LT		 4698}
4699
d45f60c6
WAA		 4700static int nfs4_write_done_cb(struct rpc_task *task,
4701 struct nfs_pgio_header *hdr)
1da177e4 4702{
d45f60c6 4703 struct inode *inode = hdr->inode;
8478eaa1 4704
d45f60c6 4705 trace_nfs4_write(hdr, task->tk_status);
9c27869d
TM		 4706 if (task->tk_status < 0) {
4707 struct nfs4_exception exception = {
4708 .inode = hdr->inode,
4709 .state = hdr->args.context->state,
4710 .stateid = &hdr->args.stateid,
4711 };
4712 task->tk_status = nfs4_async_handle_exception(task,
4713 NFS_SERVER(inode), task->tk_status,
4714 &exception);
4715 if (exception.retry) {
4716 rpc_restart_call_prepare(task);
4717 return -EAGAIN;
4718 }
1da177e4 4719 }
4f9838c7 4720 if (task->tk_status >= 0) {
d45f60c6 4721 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4722 nfs_writeback_update_inode(hdr);
4f9838c7 4723 }
788e7a89 4724 return 0;
1da177e4
LT		 4725}
4726
5521abfd 4727static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4728 struct nfs_pgio_args *args)
5521abfd
TM		 4729{
4730
4731 if (!nfs4_error_stateid_expired(task->tk_status) ||
4732 nfs4_stateid_is_current(&args->stateid,
4733 args->context,
4734 args->lock_context,
4735 FMODE_WRITE))
4736 return false;
4737 rpc_restart_call_prepare(task);
4738 return true;
4739}
4740
d45f60c6 4741static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4742{
d45f60c6 4743 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4744 return -EAGAIN;
d45f60c6 4745 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4746 return -EAGAIN;
d45f60c6
WAA		 4747 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4748 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4749}
4750
5a37f851 4751static
d45f60c6 4752bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4753{
5a37f851 4754 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4755 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4756 return false;
4757 /* Otherwise, request attributes if and only if we don't hold
4758 * a delegation
4759 */
011e2a7f 4760 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4761}
a69aef14 4762
d45f60c6
WAA		 4763static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4764 struct rpc_message *msg)
1da177e4 4765{
d45f60c6 4766 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4767
d45f60c6
WAA		 4768 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4769 hdr->args.bitmask = NULL;
4770 hdr->res.fattr = NULL;
7ffd1064 4771 } else
d45f60c6 4772 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4773
d45f60c6
WAA		 4774 if (!hdr->pgio_done_cb)
4775 hdr->pgio_done_cb = nfs4_write_done_cb;
4776 hdr->res.server = server;
4777 hdr->timestamp = jiffies;
1da177e4 4778
bdc7f021 4779 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4780 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4781}
4782
0b7c0153 4783static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4784{
d9afbd1b
TM		 4785 nfs4_setup_sequence(NFS_SERVER(data->inode),
4786 &data->args.seq_args,
4787 &data->res.seq_res,
4788 task);
1da177e4
LT		 4789}
4790
0b7c0153 4791static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4792{
1da177e4 4793 struct inode *inode = data->inode;
14516c3a 4794
cc668ab3 4795 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4796 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4797 NULL, NULL) == -EAGAIN) {
d00c5d43 4798 rpc_restart_call_prepare(task);
788e7a89 4799 return -EAGAIN;
1da177e4 4800 }
788e7a89 4801 return 0;
1da177e4
LT		 4802}
4803
0b7c0153 4804static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4805{
4806 if (!nfs4_sequence_done(task, &data->res.seq_res))
4807 return -EAGAIN;
0b7c0153 4808 return data->commit_done_cb(task, data);
5f452431
FI		 4809}
4810
0b7c0153 4811static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4812{
788e7a89 4813 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4814
0b7c0153
FI		 4815 if (data->commit_done_cb == NULL)
4816 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4817 data->res.server = server;
bdc7f021 4818 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4819 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4820}
4821
9bc4e3ca
CL		 4822struct nfs4_renewdata {
4823 struct nfs_client *client;
4824 unsigned long timestamp;
4825};
4826
1da177e4
LT		 4827/*
4828 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4829 * standalone procedure for queueing an asynchronous RENEW.
4830 */
9bc4e3ca 4831static void nfs4_renew_release(void *calldata)
dc96aef9 4832{
9bc4e3ca
CL		 4833 struct nfs4_renewdata *data = calldata;
4834 struct nfs_client *clp = data->client;
dc96aef9 4835
0851de06
AB		 4836 if (atomic_read(&clp->cl_count) > 1)
4837 nfs4_schedule_state_renewal(clp);
4838 nfs_put_client(clp);
9bc4e3ca 4839 kfree(data);
dc96aef9
AB		 4840}
4841
9bc4e3ca 4842static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4843{
9bc4e3ca
CL		 4844 struct nfs4_renewdata *data = calldata;
4845 struct nfs_client *clp = data->client;
4846 unsigned long timestamp = data->timestamp;
1da177e4 4847
c6d01c6f 4848 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4849 switch (task->tk_status) {
4850 case 0:
4851 break;
4852 case -NFS4ERR_LEASE_MOVED:
4853 nfs4_schedule_lease_moved_recovery(clp);
4854 break;
4855 default:
95baa25c 4856 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4857 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4858 return;
4859 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4860 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4861 return;
4862 }
4863 nfs4_schedule_path_down_recovery(clp);
1da177e4 4864 }
452e9352 4865 do_renew_lease(clp, timestamp);
1da177e4
LT		 4866}
4867
963d8fe5
TM		 4868static const struct rpc_call_ops nfs4_renew_ops = {
4869 .rpc_call_done = nfs4_renew_done,
dc96aef9 4870 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4871};
4872
2f60ea6b 4873static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4874{
4875 struct rpc_message msg = {
4876 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4877 .rpc_argp = clp,
b4454fe1 4878 .rpc_cred = cred,
1da177e4 4879 };
9bc4e3ca 4880 struct nfs4_renewdata *data;
1da177e4 4881
2f60ea6b
TM		 4882 if (renew_flags == 0)
4883 return 0;
0851de06
AB		 4884 if (!atomic_inc_not_zero(&clp->cl_count))
4885 return -EIO;
b569ad34 4886 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4887 if (data == NULL)
4888 return -ENOMEM;
4889 data->client = clp;
4890 data->timestamp = jiffies;
bc7a05ca 4891 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4892 &nfs4_renew_ops, data);
1da177e4
LT		 4893}
4894
8534d4ec 4895static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4896{
4897 struct rpc_message msg = {
4898 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4899 .rpc_argp = clp,
b4454fe1 4900 .rpc_cred = cred,
1da177e4
LT		 4901 };
4902 unsigned long now = jiffies;
4903 int status;
4904
bc7a05ca 4905 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4906 if (status < 0)
4907 return status;
452e9352 4908 do_renew_lease(clp, now);
1da177e4
LT		 4909 return 0;
4910}
4911
aa1870af
BF		 4912static inline int nfs4_server_supports_acls(struct nfs_server *server)
4913{
7dd7d959 4914 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4915}
4916
21f498c2
TM		 4917/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4918 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4919 * the stack.
4920 */
21f498c2 4921#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4922
e9e3d724 4923static int buf_to_pages_noslab(const void *buf, size_t buflen,
8fbcf237 4924 struct page **pages)
e9e3d724
NH		 4925{
4926 struct page *newpage, **spages;
4927 int rc = 0;
4928 size_t len;
4929 spages = pages;
4930
4931 do {
21f498c2 4932 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4933 newpage = alloc_page(GFP_KERNEL);
4934
4935 if (newpage == NULL)
4936 goto unwind;
4937 memcpy(page_address(newpage), buf, len);
4938 buf += len;
4939 buflen -= len;
4940 *pages++ = newpage;
4941 rc++;
4942 } while (buflen != 0);
4943
4944 return rc;
4945
4946unwind:
4947 for(; rc > 0; rc--)
4948 __free_page(spages[rc-1]);
4949 return -ENOMEM;
4950}
4951
e50a1c2e
BF		 4952struct nfs4_cached_acl {
4953 int cached;
4954 size_t len;
3e9d4154 4955 char data[0];
e50a1c2e
BF		 4956};
4957
4958static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4959{
4960 struct nfs_inode *nfsi = NFS_I(inode);
4961
4962 spin_lock(&inode->i_lock);
4963 kfree(nfsi->nfs4_acl);
4964 nfsi->nfs4_acl = acl;
4965 spin_unlock(&inode->i_lock);
4966}
4967
4968static void nfs4_zap_acl_attr(struct inode *inode)
4969{
4970 nfs4_set_cached_acl(inode, NULL);
4971}
4972
4973static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4974{
4975 struct nfs_inode *nfsi = NFS_I(inode);
4976 struct nfs4_cached_acl *acl;
4977 int ret = -ENOENT;
4978
4979 spin_lock(&inode->i_lock);
4980 acl = nfsi->nfs4_acl;
4981 if (acl == NULL)
4982 goto out;
4983 if (buf == NULL) /* user is just asking for length */
4984 goto out_len;
4985 if (acl->cached == 0)
4986 goto out;
4987 ret = -ERANGE; /* see getxattr(2) man page */
4988 if (acl->len > buflen)
4989 goto out;
4990 memcpy(buf, acl->data, acl->len);
4991out_len:
4992 ret = acl->len;
4993out:
4994 spin_unlock(&inode->i_lock);
4995 return ret;
4996}
4997
5794d21e 4998static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4999{
5000 struct nfs4_cached_acl *acl;
b291f1b1 5001 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 5002
1f1ea6c2 5003 if (buflen <= PAGE_SIZE) {
b291f1b1 5004 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 5005 if (acl == NULL)
5006 goto out;
5007 acl->cached = 1;
5794d21e 5008 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 5009 } else {
5010 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
5011 if (acl == NULL)
5012 goto out;
5013 acl->cached = 0;
5014 }
5015 acl->len = acl_len;
5016out:
5017 nfs4_set_cached_acl(inode, acl);
5018}
5019
bf118a34
AA		 5020/*
5021 * The getxattr API returns the required buffer length when called with a
5022 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
5023 * the required buf. On a NULL buf, we send a page of data to the server
5024 * guessing that the ACL request can be serviced by a page. If so, we cache
5025 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
5026 * the cache. If not so, we throw away the page, and cache the required
5027 * length. The next getxattr call will then produce another round trip to
5028 * the server, this time with the input buf of the required size.
5029 */
16b4289c 5030static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 5031{
bf118a34 5032 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 5033 struct nfs_getaclargs args = {
5034 .fh = NFS_FH(inode),
5035 .acl_pages = pages,
5036 .acl_len = buflen,
5037 };
663c79b3
BH		 5038 struct nfs_getaclres res = {
5039 .acl_len = buflen,
5040 };
aa1870af
BF		 5041 struct rpc_message msg = {
5042 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
5043 .rpc_argp = &args,
663c79b3 5044 .rpc_resp = &res,
aa1870af 5045 };
21f498c2
TM		 5046 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
5047 int ret = -ENOMEM, i;
aa1870af 5048
bf118a34
AA		 5049 /* As long as we're doing a round trip to the server anyway,
5050 * let's be prepared for a page of acl data. */
5051 if (npages == 0)
5052 npages = 1;
21f498c2
TM		 5053 if (npages > ARRAY_SIZE(pages))
5054 return -ERANGE;
5a006899 5055
bf118a34
AA		 5056 for (i = 0; i < npages; i++) {
5057 pages[i] = alloc_page(GFP_KERNEL);
5058 if (!pages[i])
5059 goto out_free;
e50a1c2e 5060 }
5a006899
SP		 5061
5062 /* for decoding across pages */
5063 res.acl_scratch = alloc_page(GFP_KERNEL);
5064 if (!res.acl_scratch)
5065 goto out_free;
5066
bf118a34 5067 args.acl_len = npages * PAGE_SIZE;
5a006899 5068
de040bec 5069 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 5070 __func__, buf, buflen, npages, args.acl_len);
5071 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
5072 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 5073 if (ret)
5074 goto out_free;
bf118a34 5075
1f1ea6c2
TM		 5076 /* Handle the case where the passed-in buffer is too short */
5077 if (res.acl_flags & NFS4_ACL_TRUNC) {
5078 /* Did the user only issue a request for the acl length? */
5079 if (buf == NULL)
5080 goto out_ok;
e50a1c2e 5081 ret = -ERANGE;
1f1ea6c2 5082 goto out_free;
e50a1c2e 5083 }
1f1ea6c2 5084 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 5085 if (buf) {
5086 if (res.acl_len > buflen) {
5087 ret = -ERANGE;
5088 goto out_free;
5089 }
1f1ea6c2 5090 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 5091 }
1f1ea6c2
TM		 5092out_ok:
5093 ret = res.acl_len;
e50a1c2e 5094out_free:
bf118a34
AA		 5095 for (i = 0; i < npages; i++)
5096 if (pages[i])
5097 __free_page(pages[i]);
331818f1
TM		 5098 if (res.acl_scratch)
5099 __free_page(res.acl_scratch);
aa1870af
BF		 5100 return ret;
5101}
5102
16b4289c
TM		 5103static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
5104{
5105 struct nfs4_exception exception = { };
5106 ssize_t ret;
5107 do {
5108 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 5109 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 5110 if (ret >= 0)
5111 break;
5112 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
5113 } while (exception.retry);
5114 return ret;
5115}
5116
e50a1c2e
BF		 5117static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
5118{
5119 struct nfs_server *server = NFS_SERVER(inode);
5120 int ret;
5121
5122 if (!nfs4_server_supports_acls(server))
5123 return -EOPNOTSUPP;
5124 ret = nfs_revalidate_inode(server, inode);
5125 if (ret < 0)
5126 return ret;
08a22b39
AK		 5127 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
5128 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 5129 ret = nfs4_read_cached_acl(inode, buf, buflen);
5130 if (ret != -ENOENT)
bf118a34
AA		 5131 /* -ENOENT is returned if there is no ACL or if there is an ACL
5132 * but no cached acl data, just the acl length */
e50a1c2e
BF		 5133 return ret;
5134 return nfs4_get_acl_uncached(inode, buf, buflen);
5135}
5136
16b4289c 5137static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 5138{
5139 struct nfs_server *server = NFS_SERVER(inode);
5140 struct page *pages[NFS4ACL_MAXPAGES];
5141 struct nfs_setaclargs arg = {
5142 .fh = NFS_FH(inode),
5143 .acl_pages = pages,
5144 .acl_len = buflen,
5145 };
73c403a9 5146 struct nfs_setaclres res;
4b580ee3
BF		 5147 struct rpc_message msg = {
5148 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
5149 .rpc_argp = &arg,
73c403a9 5150 .rpc_resp = &res,
4b580ee3 5151 };
21f498c2 5152 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 5153 int ret, i;
4b580ee3
BF		 5154
5155 if (!nfs4_server_supports_acls(server))
5156 return -EOPNOTSUPP;
21f498c2
TM		 5157 if (npages > ARRAY_SIZE(pages))
5158 return -ERANGE;
8fbcf237 5159 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
e9e3d724
NH		 5160 if (i < 0)
5161 return i;
57ec14c5 5162 nfs4_inode_return_delegation(inode);
7c513058 5163 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 5164
5165 /*
5166 * Free each page after tx, so the only ref left is
5167 * held by the network stack
5168 */
5169 for (; i > 0; i--)
5170 put_page(pages[i-1]);
5171
08a22b39
AK		 5172 /*
5173 * Acl update can result in inode attribute update.
5174 * so mark the attribute cache invalid.
5175 */
5176 spin_lock(&inode->i_lock);
5177 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
5178 spin_unlock(&inode->i_lock);
f41f7418
TM		 5179 nfs_access_zap_cache(inode);
5180 nfs_zap_acl_cache(inode);
4b580ee3
BF		 5181 return ret;
5182}
5183
16b4289c
TM		 5184static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
5185{
5186 struct nfs4_exception exception = { };
5187 int err;
5188 do {
c1578b76
TM		 5189 err = __nfs4_proc_set_acl(inode, buf, buflen);
5190 trace_nfs4_set_acl(inode, err);
5191 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 5192 &exception);
5193 } while (exception.retry);
5194 return err;
5195}
5196
aa9c2669
DQ		 5197#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5198static int _nfs4_get_security_label(struct inode *inode, void *buf,
5199 size_t buflen)
5200{
5201 struct nfs_server *server = NFS_SERVER(inode);
5202 struct nfs_fattr fattr;
5203 struct nfs4_label label = {0, 0, buflen, buf};
5204
5205 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 5206 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 5207 .fh = NFS_FH(inode),
5208 .bitmask = bitmask,
5209 };
5210 struct nfs4_getattr_res res = {
5211 .fattr = &fattr,
5212 .label = &label,
5213 .server = server,
5214 };
5215 struct rpc_message msg = {
5216 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 5217 .rpc_argp = &arg,
aa9c2669
DQ		 5218 .rpc_resp = &res,
5219 };
5220 int ret;
5221
5222 nfs_fattr_init(&fattr);
5223
fcb63a9b 5224 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 5225 if (ret)
5226 return ret;
5227 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
5228 return -ENOENT;
5229 if (buflen < label.len)
5230 return -ERANGE;
5231 return 0;
5232}
5233
5234static int nfs4_get_security_label(struct inode *inode, void *buf,
5235 size_t buflen)
5236{
5237 struct nfs4_exception exception = { };
5238 int err;
5239
5240 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5241 return -EOPNOTSUPP;
5242
5243 do {
c1578b76
TM		 5244 err = _nfs4_get_security_label(inode, buf, buflen);
5245 trace_nfs4_get_security_label(inode, err);
5246 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5247 &exception);
5248 } while (exception.retry);
5249 return err;
5250}
5251
5252static int _nfs4_do_set_security_label(struct inode *inode,
5253 struct nfs4_label *ilabel,
5254 struct nfs_fattr *fattr,
5255 struct nfs4_label *olabel)
5256{
5257
5258 struct iattr sattr = {0};
5259 struct nfs_server *server = NFS_SERVER(inode);
5260 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 5261 struct nfs_setattrargs arg = {
aa9c2669
DQ		 5262 .fh = NFS_FH(inode),
5263 .iap = &sattr,
5264 .server = server,
5265 .bitmask = bitmask,
5266 .label = ilabel,
5267 };
5268 struct nfs_setattrres res = {
5269 .fattr = fattr,
5270 .label = olabel,
5271 .server = server,
5272 };
5273 struct rpc_message msg = {
5274 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 5275 .rpc_argp = &arg,
aa9c2669
DQ		 5276 .rpc_resp = &res,
5277 };
5278 int status;
5279
12207f69 5280 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 5281
12207f69 5282 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 5283 if (status)
5284 dprintk("%s failed: %d\n", __func__, status);
5285
5286 return status;
5287}
5288
5289static int nfs4_do_set_security_label(struct inode *inode,
5290 struct nfs4_label *ilabel,
5291 struct nfs_fattr *fattr,
5292 struct nfs4_label *olabel)
5293{
5294 struct nfs4_exception exception = { };
5295 int err;
5296
5297 do {
c1578b76
TM		 5298 err = _nfs4_do_set_security_label(inode, ilabel,
5299 fattr, olabel);
5300 trace_nfs4_set_security_label(inode, err);
5301 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5302 &exception);
5303 } while (exception.retry);
5304 return err;
5305}
5306
5307static int
59301226 5308nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
aa9c2669
DQ		 5309{
5310 struct nfs4_label ilabel, *olabel = NULL;
5311 struct nfs_fattr fattr;
5312 struct rpc_cred *cred;
aa9c2669
DQ		 5313 int status;
5314
5315 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5316 return -EOPNOTSUPP;
5317
5318 nfs_fattr_init(&fattr);
5319
5320 ilabel.pi = 0;
5321 ilabel.lfs = 0;
5322 ilabel.label = (char *)buf;
5323 ilabel.len = buflen;
5324
5325 cred = rpc_lookup_cred();
5326 if (IS_ERR(cred))
5327 return PTR_ERR(cred);
5328
5329 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5330 if (IS_ERR(olabel)) {
5331 status = -PTR_ERR(olabel);
5332 goto out;
5333 }
5334
5335 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5336 if (status == 0)
5337 nfs_setsecurity(inode, &fattr, olabel);
5338
5339 nfs4_label_free(olabel);
5340out:
5341 put_rpccred(cred);
5342 return status;
5343}
5344#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5345
5346
f092075d
CL		 5347static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5348 nfs4_verifier *bootverf)
cd93710e
CL		 5349{
5350 __be32 verf[2];
5351
2c820d9a
CL		 5352 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5353 /* An impossible timestamp guarantees this value
5354 * will never match a generated boot time. */
2f86e091
DD		 5355 verf[0] = cpu_to_be32(U32_MAX);
5356 verf[1] = cpu_to_be32(U32_MAX);
2c820d9a 5357 } else {
f092075d 5358 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
2f86e091
DD		 5359 u64 ns = ktime_to_ns(nn->boot_time);
5360
5361 verf[0] = cpu_to_be32(ns >> 32);
5362 verf[1] = cpu_to_be32(ns);
2c820d9a 5363 }
cd93710e
CL		 5364 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5365}
5366
a3192688
JL		 5367static int
5368nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 5369{
a3192688
JL		 5370 size_t len;
5371 char *str;
e984a55a 5372
ceb3a16c 5373 if (clp->cl_owner_id != NULL)
a3192688 5374 return 0;
4a3e5779 5375
a3192688 5376 rcu_read_lock();
4a70316c 5377 len = 14 + strlen(clp->cl_ipaddr) + 1 +
a3192688
JL		 5378 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5379 1 +
5380 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5381 1;
5382 rcu_read_unlock();
5383
5384 if (len > NFS4_OPAQUE_LIMIT + 1)
5385 return -EINVAL;
5386
5387 /*
5388 * Since this string is allocated at mount time, and held until the
5389 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5390 * about a memory-reclaim deadlock.
5391 */
5392 str = kmalloc(len, GFP_KERNEL);
5393 if (!str)
5394 return -ENOMEM;
ceb3a16c 5395
e984a55a 5396 rcu_read_lock();
f2dd436e 5397 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
a3192688
JL		 5398 clp->cl_ipaddr,
5399 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5400 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5401 rcu_read_unlock();
a3192688 5402
a3192688
JL		 5403 clp->cl_owner_id = str;
5404 return 0;
e984a55a
CL		 5405}
5406
873e3851
JL		 5407static int
5408nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5409{
873e3851
JL		 5410 size_t len;
5411 char *str;
5412
5413 len = 10 + 10 + 1 + 10 + 1 +
5414 strlen(nfs4_client_id_uniquifier) + 1 +
5415 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5416
5417 if (len > NFS4_OPAQUE_LIMIT + 1)
5418 return -EINVAL;
5419
5420 /*
5421 * Since this string is allocated at mount time, and held until the
5422 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5423 * about a memory-reclaim deadlock.
5424 */
5425 str = kmalloc(len, GFP_KERNEL);
5426 if (!str)
5427 return -ENOMEM;
5428
f2dd436e 5429 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
873e3851
JL		 5430 clp->rpc_ops->version, clp->cl_minorversion,
5431 nfs4_client_id_uniquifier,
5432 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5433 clp->cl_owner_id = str;
5434 return 0;
5435}
5436
5437static int
5438nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5439{
873e3851
JL		 5440 size_t len;
5441 char *str;
ceb3a16c
TM		 5442
5443 if (clp->cl_owner_id != NULL)
873e3851 5444 return 0;
6f2ea7f2
CL		 5445
5446 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5447 return nfs4_init_uniquifier_client_string(clp);
5448
5449 len = 10 + 10 + 1 + 10 + 1 +
5450 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5451
5452 if (len > NFS4_OPAQUE_LIMIT + 1)
5453 return -EINVAL;
5454
5455 /*
5456 * Since this string is allocated at mount time, and held until the
5457 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5458 * about a memory-reclaim deadlock.
5459 */
5460 str = kmalloc(len, GFP_KERNEL);
5461 if (!str)
5462 return -ENOMEM;
5463
f2dd436e 5464 scnprintf(str, len, "Linux NFSv%u.%u %s",
873e3851
JL		 5465 clp->rpc_ops->version, clp->cl_minorversion,
5466 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5467 clp->cl_owner_id = str;
5468 return 0;
e984a55a
CL		 5469}
5470
706cb8db
CL		 5471/*
5472 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5473 * services. Advertise one based on the address family of the
5474 * clientaddr.
5475 */
5476static unsigned int
5477nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5478{
5479 if (strchr(clp->cl_ipaddr, ':') != NULL)
5480 return scnprintf(buf, len, "tcp6");
5481 else
5482 return scnprintf(buf, len, "tcp");
5483}
5484
f11b2a1c
JL		 5485static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5486{
5487 struct nfs4_setclientid *sc = calldata;
5488
5489 if (task->tk_status == 0)
5490 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5491}
5492
5493static const struct rpc_call_ops nfs4_setclientid_ops = {
5494 .rpc_call_done = nfs4_setclientid_done,
5495};
5496
6bbb4ae8
CL		 5497/**
5498 * nfs4_proc_setclientid - Negotiate client ID
5499 * @clp: state data structure
5500 * @program: RPC program for NFSv4 callback service
5501 * @port: IP port number for NFS4 callback service
5502 * @cred: RPC credential to use for this call
5503 * @res: where to place the result
5504 *
5505 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5506 */
bb8b27e5
TM		 5507int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5508 unsigned short port, struct rpc_cred *cred,
5509 struct nfs4_setclientid_res *res)
1da177e4
LT		 5510{
5511 nfs4_verifier sc_verifier;
5512 struct nfs4_setclientid setclientid = {
5513 .sc_verifier = &sc_verifier,
5514 .sc_prog = program,
3a6bb738 5515 .sc_clnt = clp,
1da177e4
LT		 5516 };
5517 struct rpc_message msg = {
5518 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5519 .rpc_argp = &setclientid,
bb8b27e5 5520 .rpc_resp = res,
286d7d6a 5521 .rpc_cred = cred,
1da177e4 5522 };
f11b2a1c
JL		 5523 struct rpc_task *task;
5524 struct rpc_task_setup task_setup_data = {
5525 .rpc_client = clp->cl_rpcclient,
5526 .rpc_message = &msg,
5527 .callback_ops = &nfs4_setclientid_ops,
5528 .callback_data = &setclientid,
5529 .flags = RPC_TASK_TIMEOUT,
5530 };
6bbb4ae8 5531 int status;
1da177e4 5532
de734831 5533 /* nfs_client_id4 */
f092075d 5534 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5535
5536 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5537 status = nfs4_init_uniform_client_string(clp);
5538 else
a3192688 5539 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5540
5541 if (status)
5542 goto out;
3a6bb738 5543
de734831 5544 /* cb_client4 */
706cb8db
CL		 5545 setclientid.sc_netid_len =
5546 nfs4_init_callback_netid(clp,
5547 setclientid.sc_netid,
5548 sizeof(setclientid.sc_netid));
de734831 5549 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5550 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5551 clp->cl_ipaddr, port >> 8, port & 255);
5552
3a6bb738 5553 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5554 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5555 clp->cl_owner_id);
f11b2a1c
JL		 5556 task = rpc_run_task(&task_setup_data);
5557 if (IS_ERR(task)) {
5558 status = PTR_ERR(task);
5559 goto out;
5560 }
5561 status = task->tk_status;
5562 if (setclientid.sc_cred) {
5563 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5564 put_rpccred(setclientid.sc_cred);
5565 }
5566 rpc_put_task(task);
5567out:
c6d01c6f 5568 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5569 dprintk("NFS reply setclientid: %d\n", status);
5570 return status;
1da177e4
LT		 5571}
5572
6bbb4ae8
CL		 5573/**
5574 * nfs4_proc_setclientid_confirm - Confirm client ID
5575 * @clp: state data structure
5576 * @res: result of a previous SETCLIENTID
5577 * @cred: RPC credential to use for this call
5578 *
5579 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5580 */
fd954ae1 5581int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5582 struct nfs4_setclientid_res *arg,
5583 struct rpc_cred *cred)
1da177e4 5584{
1da177e4
LT		 5585 struct rpc_message msg = {
5586 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5587 .rpc_argp = arg,
286d7d6a 5588 .rpc_cred = cred,
1da177e4 5589 };
1da177e4
LT		 5590 int status;
5591
6bbb4ae8
CL		 5592 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5593 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5594 clp->cl_clientid);
1bd714f2 5595 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5596 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5597 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5598 return status;
5599}
5600
fe650407
TM		 5601struct nfs4_delegreturndata {
5602 struct nfs4_delegreturnargs args;
fa178f29 5603 struct nfs4_delegreturnres res;
fe650407
TM		 5604 struct nfs_fh fh;
5605 nfs4_stateid stateid;
26e976a8 5606 unsigned long timestamp;
586f1c39
TM		 5607 struct {
5608 struct nfs4_layoutreturn_args arg;
5609 struct nfs4_layoutreturn_res res;
4d796d75 5610 struct nfs4_xdr_opaque_data ld_private;
586f1c39
TM		 5611 u32 roc_barrier;
5612 bool roc;
5613 } lr;
fa178f29 5614 struct nfs_fattr fattr;
fe650407 5615 int rpc_status;
039b756a 5616 struct inode *inode;
fe650407
TM		 5617};
5618
fe650407
TM		 5619static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5620{
5621 struct nfs4_delegreturndata *data = calldata;
938e1010 5622
14516c3a
TM		 5623 if (!nfs4_sequence_done(task, &data->res.seq_res))
5624 return;
938e1010 5625
ca8acf8d 5626 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
586f1c39
TM		 5627
5628 /* Handle Layoutreturn errors */
5629 if (data->args.lr_args && task->tk_status != 0) {
5630 switch(data->res.lr_ret) {
5631 default:
5632 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
5633 break;
5634 case 0:
5635 data->args.lr_args = NULL;
5636 data->res.lr_res = NULL;
5637 break;
5638 case -NFS4ERR_ADMIN_REVOKED:
5639 case -NFS4ERR_DELEG_REVOKED:
5640 case -NFS4ERR_EXPIRED:
5641 case -NFS4ERR_BAD_STATEID:
5642 case -NFS4ERR_OLD_STATEID:
5643 case -NFS4ERR_UNKNOWN_LAYOUTTYPE:
5644 case -NFS4ERR_WRONG_CRED:
5645 data->args.lr_args = NULL;
5646 data->res.lr_res = NULL;
5647 data->res.lr_ret = 0;
5648 rpc_restart_call_prepare(task);
5649 return;
5650 }
5651 }
5652
79708861 5653 switch (task->tk_status) {
79708861 5654 case 0:
fa178f29 5655 renew_lease(data->res.server, data->timestamp);
23ea44c2 5656 break;
c97cf606
TM		 5657 case -NFS4ERR_ADMIN_REVOKED:
5658 case -NFS4ERR_DELEG_REVOKED:
26d36301
TM		 5659 case -NFS4ERR_EXPIRED:
5660 nfs4_free_revoked_stateid(data->res.server,
5661 data->args.stateid,
5662 task->tk_msg.rpc_cred);
c97cf606
TM		 5663 case -NFS4ERR_BAD_STATEID:
5664 case -NFS4ERR_OLD_STATEID:
5665 case -NFS4ERR_STALE_STATEID:
c97cf606
TM		 5666 task->tk_status = 0;
5667 break;
79708861 5668 default:
8478eaa1
N		 5669 if (nfs4_async_handle_error(task, data->res.server,
5670 NULL, NULL) == -EAGAIN) {
d00c5d43 5671 rpc_restart_call_prepare(task);
79708861
RL		 5672 return;
5673 }
5674 }
5675 data->rpc_status = task->tk_status;
fe650407
TM		 5676}
5677
5678static void nfs4_delegreturn_release(void *calldata)
5679{
039b756a 5680 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5681 struct inode *inode = data->inode;
039b756a 5682
ea7c38fe 5683 if (inode) {
586f1c39 5684 if (data->lr.roc)
1c5bd76d
TM		 5685 pnfs_roc_release(&data->lr.arg, &data->lr.res,
5686 data->res.lr_ret);
ea7c38fe
TM		 5687 nfs_iput_and_deactive(inode);
5688 }
fe650407
TM		 5689 kfree(calldata);
5690}
5691
938e1010
AA		 5692static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5693{
5694 struct nfs4_delegreturndata *d_data;
5695
5696 d_data = (struct nfs4_delegreturndata *)data;
5697
1c5bd76d 5698 if (!d_data->lr.roc && nfs4_wait_on_layoutreturn(d_data->inode, task))
500d701f
PT		 5699 return;
5700
d9afbd1b
TM		 5701 nfs4_setup_sequence(d_data->res.server,
5702 &d_data->args.seq_args,
5703 &d_data->res.seq_res,
5704 task);
938e1010 5705}
938e1010 5706
c8d149f3 5707static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5708 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5709 .rpc_call_done = nfs4_delegreturn_done,
5710 .rpc_release = nfs4_delegreturn_release,
5711};
5712
e6f81075 5713static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5714{
5715 struct nfs4_delegreturndata *data;
fa178f29 5716 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5717 struct rpc_task *task;
5138fde0
TM		 5718 struct rpc_message msg = {
5719 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5720 .rpc_cred = cred,
5721 };
c970aa85
TM		 5722 struct rpc_task_setup task_setup_data = {
5723 .rpc_client = server->client,
5138fde0 5724 .rpc_message = &msg,
c970aa85
TM		 5725 .callback_ops = &nfs4_delegreturn_ops,
5726 .flags = RPC_TASK_ASYNC,
5727 };
e6f81075 5728 int status = 0;
fe650407 5729
8535b2be 5730 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5731 if (data == NULL)
5732 return -ENOMEM;
a9c92d6b 5733 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
99ade3c7
AE		 5734
5735 nfs4_state_protect(server->nfs_client,
5736 NFS_SP4_MACH_CRED_CLEANUP,
5737 &task_setup_data.rpc_client, &msg);
5738
fe650407
TM		 5739 data->args.fhandle = &data->fh;
5740 data->args.stateid = &data->stateid;
9e907fec 5741 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5742 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5743 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5744 data->res.fattr = &data->fattr;
5745 data->res.server = server;
586f1c39 5746 data->res.lr_ret = -NFS4ERR_NOMATCHING_LAYOUT;
4d796d75 5747 data->lr.arg.ld_private = &data->lr.ld_private;
5138fde0 5748 nfs_fattr_init(data->res.fattr);
26e976a8 5749 data->timestamp = jiffies;
fe650407 5750 data->rpc_status = 0;
53e6fc86 5751 data->lr.roc = pnfs_roc(inode, &data->lr.arg, &data->lr.res, cred);
ea7c38fe 5752 data->inode = nfs_igrab_and_active(inode);
1c5bd76d 5753 if (data->inode) {
1c5bd76d
TM		 5754 if (data->lr.roc) {
5755 data->args.lr_args = &data->lr.arg;
5756 data->res.lr_res = &data->lr.res;
5757 }
53e6fc86
TM		 5758 } else if (data->lr.roc) {
5759 pnfs_roc_release(&data->lr.arg, &data->lr.res, 0);
5760 data->lr.roc = false;
1c5bd76d 5761 }
fe650407 5762
c970aa85 5763 task_setup_data.callback_data = data;
1174dd1f
TM		 5764 msg.rpc_argp = &data->args;
5765 msg.rpc_resp = &data->res;
c970aa85 5766 task = rpc_run_task(&task_setup_data);
7a1218a2 5767 if (IS_ERR(task))
fe650407 5768 return PTR_ERR(task);
e6f81075
TM		 5769 if (!issync)
5770 goto out;
fe650407 5771 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5772 if (status != 0)
5773 goto out;
5774 status = data->rpc_status;
e144cbcc
TM		 5775 if (status == 0)
5776 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5777 else
5778 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5779out:
e6b3c4db 5780 rpc_put_task(task);
fe650407 5781 return status;
1da177e4
LT		 5782}
5783
e6f81075 5784int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5785{
5786 struct nfs_server *server = NFS_SERVER(inode);
5787 struct nfs4_exception exception = { };
5788 int err;
5789 do {
e6f81075 5790 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
48c9579a 5791 trace_nfs4_delegreturn(inode, stateid, err);
1da177e4
LT		 5792 switch (err) {
5793 case -NFS4ERR_STALE_STATEID:
5794 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5795 case 0:
5796 return 0;
5797 }
5798 err = nfs4_handle_exception(server, err, &exception);
5799 } while (exception.retry);
5800 return err;
5801}
5802
1da177e4
LT		 5803static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5804{
5805 struct inode *inode = state->inode;
5806 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5807 struct nfs_client *clp = server->nfs_client;
911d1aaf 5808 struct nfs_lockt_args arg = {
1da177e4 5809 .fh = NFS_FH(inode),
911d1aaf 5810 .fl = request,
1da177e4 5811 };
911d1aaf
TM		 5812 struct nfs_lockt_res res = {
5813 .denied = request,
1da177e4
LT		 5814 };
5815 struct rpc_message msg = {
5816 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5817 .rpc_argp = &arg,
5818 .rpc_resp = &res,
5819 .rpc_cred = state->owner->so_cred,
5820 };
1da177e4
LT		 5821 struct nfs4_lock_state *lsp;
5822 int status;
5823
911d1aaf 5824 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5825 status = nfs4_set_lock_state(state, request);
5826 if (status != 0)
5827 goto out;
5828 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5829 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5830 arg.lock_owner.s_dev = server->s_dev;
7c513058 5831 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5832 switch (status) {
5833 case 0:
5834 request->fl_type = F_UNLCK;
5835 break;
5836 case -NFS4ERR_DENIED:
5837 status = 0;
1da177e4 5838 }
70cc6487 5839 request->fl_ops->fl_release_private(request);
a6f951dd 5840 request->fl_ops = NULL;
8d0a8a9d 5841out:
1da177e4
LT		 5842 return status;
5843}
5844
5845static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5846{
5847 struct nfs4_exception exception = { };
5848 int err;
5849
5850 do {
d1b748a5
TM		 5851 err = _nfs4_proc_getlk(state, cmd, request);
5852 trace_nfs4_get_lock(request, state, cmd, err);
5853 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5854 &exception);
5855 } while (exception.retry);
5856 return err;
5857}
5858
faf5f49c 5859struct nfs4_unlockdata {
911d1aaf
TM		 5860 struct nfs_locku_args arg;
5861 struct nfs_locku_res res;
faf5f49c
TM		 5862 struct nfs4_lock_state *lsp;
5863 struct nfs_open_context *ctx;
911d1aaf 5864 struct file_lock fl;
516285eb 5865 struct nfs_server *server;
26e976a8 5866 unsigned long timestamp;
faf5f49c
TM		 5867};
5868
911d1aaf
TM		 5869static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5870 struct nfs_open_context *ctx,
5871 struct nfs4_lock_state *lsp,
5872 struct nfs_seqid *seqid)
5873{
5874 struct nfs4_unlockdata *p;
5875 struct inode *inode = lsp->ls_state->inode;
5876
8535b2be 5877 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5878 if (p == NULL)
5879 return NULL;
5880 p->arg.fh = NFS_FH(inode);
5881 p->arg.fl = &p->fl;
5882 p->arg.seqid = seqid;
c1d51931 5883 p->res.seqid = seqid;
911d1aaf
TM		 5884 p->lsp = lsp;
5885 atomic_inc(&lsp->ls_count);
5886 /* Ensure we don't close file until we're done freeing locks! */
5887 p->ctx = get_nfs_open_context(ctx);
5888 memcpy(&p->fl, fl, sizeof(p->fl));
5889 p->server = NFS_SERVER(inode);
5890 return p;
5891}
5892
06f814a3 5893static void nfs4_locku_release_calldata(void *data)
faf5f49c 5894{
963d8fe5 5895 struct nfs4_unlockdata *calldata = data;
911d1aaf 5896 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5897 nfs4_put_lock_state(calldata->lsp);
5898 put_nfs_open_context(calldata->ctx);
5899 kfree(calldata);
faf5f49c
TM		 5900}
5901
963d8fe5 5902static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5903{
963d8fe5 5904 struct nfs4_unlockdata *calldata = data;
faf5f49c 5905
14516c3a
TM		 5906 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5907 return;
faf5f49c
TM		 5908 switch (task->tk_status) {
5909 case 0:
26e976a8 5910 renew_lease(calldata->server, calldata->timestamp);
75575ddf 5911 locks_lock_inode_wait(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 5912 if (nfs4_update_lock_stateid(calldata->lsp,
5913 &calldata->res.stateid))
5914 break;
26d36301
TM		 5915 case -NFS4ERR_ADMIN_REVOKED:
5916 case -NFS4ERR_EXPIRED:
5917 nfs4_free_revoked_stateid(calldata->server,
5918 &calldata->arg.stateid,
5919 task->tk_msg.rpc_cred);
9e33bed5
TM		 5920 case -NFS4ERR_BAD_STATEID:
5921 case -NFS4ERR_OLD_STATEID:
faf5f49c 5922 case -NFS4ERR_STALE_STATEID:
425c1d4e
TM		 5923 if (!nfs4_stateid_match(&calldata->arg.stateid,
5924 &calldata->lsp->ls_stateid))
5925 rpc_restart_call_prepare(task);
faf5f49c
TM		 5926 break;
5927 default:
8478eaa1
N		 5928 if (nfs4_async_handle_error(task, calldata->server,
5929 NULL, NULL) == -EAGAIN)
d00c5d43 5930 rpc_restart_call_prepare(task);
faf5f49c 5931 }
2b1bc308 5932 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5933}
5934
4ce70ada 5935static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5936{
4ce70ada 5937 struct nfs4_unlockdata *calldata = data;
faf5f49c 5938
911d1aaf 5939 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5940 goto out_wait;
425c1d4e 5941 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5942 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5943 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5944 goto out_no_action;
faf5f49c 5945 }
26e976a8 5946 calldata->timestamp = jiffies;
035168ab 5947 if (nfs4_setup_sequence(calldata->server,
a893693c 5948 &calldata->arg.seq_args,
2240a9e2
TM		 5949 &calldata->res.seq_res,
5950 task) != 0)
5951 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5952 return;
5953out_no_action:
5954 task->tk_action = NULL;
5955out_wait:
5956 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5957}
5958
963d8fe5 5959static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5960 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5961 .rpc_call_done = nfs4_locku_done,
06f814a3 5962 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5963};
5964
a5d16a4d
TM		 5965static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5966 struct nfs_open_context *ctx,
5967 struct nfs4_lock_state *lsp,
5968 struct nfs_seqid *seqid)
5969{
5970 struct nfs4_unlockdata *data;
5138fde0
TM		 5971 struct rpc_message msg = {
5972 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5973 .rpc_cred = ctx->cred,
5974 };
c970aa85
TM		 5975 struct rpc_task_setup task_setup_data = {
5976 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5977 .rpc_message = &msg,
c970aa85 5978 .callback_ops = &nfs4_locku_ops,
101070ca 5979 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5980 .flags = RPC_TASK_ASYNC,
5981 };
a5d16a4d 5982
fa940720
WAA		 5983 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5984 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5985
137d6aca
FF		 5986 /* Ensure this is an unlock - when canceling a lock, the
5987 * canceled lock is passed in, and it won't be an unlock.
5988 */
5989 fl->fl_type = F_UNLCK;
5990
a5d16a4d
TM		 5991 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5992 if (data == NULL) {
5993 nfs_free_seqid(seqid);
5994 return ERR_PTR(-ENOMEM);
5995 }
5996
a9c92d6b 5997 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5998 msg.rpc_argp = &data->arg;
5999 msg.rpc_resp = &data->res;
c970aa85
TM		 6000 task_setup_data.callback_data = data;
6001 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 6002}
6003
faf5f49c
TM		 6004static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
6005{
65b62a29
TM		 6006 struct inode *inode = state->inode;
6007 struct nfs4_state_owner *sp = state->owner;
6008 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 6009 struct nfs_seqid *seqid;
1da177e4 6010 struct nfs4_lock_state *lsp;
06f814a3 6011 struct rpc_task *task;
b4019c0e 6012 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 6013 int status = 0;
536ff0f8 6014 unsigned char fl_flags = request->fl_flags;
faf5f49c 6015
8d0a8a9d 6016 status = nfs4_set_lock_state(state, request);
9b073574
TM		 6017 /* Unlock _before_ we do the RPC call */
6018 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 6019 /* Exclude nfs_delegation_claim_locks() */
6020 mutex_lock(&sp->so_delegreturn_mutex);
6021 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 6022 down_read(&nfsi->rwsem);
75575ddf 6023 if (locks_lock_inode_wait(inode, request) == -ENOENT) {
19e03c57 6024 up_read(&nfsi->rwsem);
65b62a29 6025 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 6026 goto out;
19e03c57
TM		 6027 }
6028 up_read(&nfsi->rwsem);
65b62a29 6029 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 6030 if (status != 0)
9b073574
TM		 6031 goto out;
6032 /* Is this a delegated lock? */
8d0a8a9d 6033 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 6034 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
6035 goto out;
b4019c0e
TM		 6036 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
6037 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 6038 status = -ENOMEM;
badc76dd 6039 if (IS_ERR(seqid))
9b073574 6040 goto out;
cd3758e3 6041 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 6042 status = PTR_ERR(task);
6043 if (IS_ERR(task))
9b073574 6044 goto out;
a5d16a4d 6045 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 6046 rpc_put_task(task);
9b073574 6047out:
536ff0f8 6048 request->fl_flags = fl_flags;
d1b748a5 6049 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 6050 return status;
6051}
6052
a5d16a4d
TM		 6053struct nfs4_lockdata {
6054 struct nfs_lock_args arg;
6055 struct nfs_lock_res res;
6056 struct nfs4_lock_state *lsp;
6057 struct nfs_open_context *ctx;
6058 struct file_lock fl;
26e976a8 6059 unsigned long timestamp;
a5d16a4d
TM		 6060 int rpc_status;
6061 int cancelled;
66179efe 6062 struct nfs_server *server;
a5d16a4d
TM		 6063};
6064
6065static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 6066 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
6067 gfp_t gfp_mask)
1da177e4 6068{
a5d16a4d
TM		 6069 struct nfs4_lockdata *p;
6070 struct inode *inode = lsp->ls_state->inode;
1da177e4 6071 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 6072 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 6073
8535b2be 6074 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 6075 if (p == NULL)
6076 return NULL;
6077
6078 p->arg.fh = NFS_FH(inode);
6079 p->arg.fl = &p->fl;
8535b2be 6080 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 6081 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 6082 goto out_free;
b4019c0e
TM		 6083 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
6084 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 6085 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 6086 goto out_free_seqid;
7539bbab 6087 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 6088 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 6089 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 6090 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 6091 p->lsp = lsp;
66179efe 6092 p->server = server;
a5d16a4d
TM		 6093 atomic_inc(&lsp->ls_count);
6094 p->ctx = get_nfs_open_context(ctx);
feaff8e5 6095 get_file(fl->fl_file);
a5d16a4d
TM		 6096 memcpy(&p->fl, fl, sizeof(p->fl));
6097 return p;
2f74c0a0
TM		 6098out_free_seqid:
6099 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 6100out_free:
6101 kfree(p);
6102 return NULL;
6103}
6104
6105static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
6106{
6107 struct nfs4_lockdata *data = calldata;
6108 struct nfs4_state *state = data->lsp->ls_state;
06735b34 6109
3110ff80 6110 dprintk("%s: begin!\n", __func__);
2f74c0a0 6111 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 6112 goto out_wait;
a5d16a4d 6113 /* Do we need to do an open_to_lock_owner? */
6b447539 6114 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 6115 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 6116 goto out_release_lock_seqid;
8fe72bac 6117 }
425c1d4e
TM		 6118 nfs4_stateid_copy(&data->arg.open_stateid,
6119 &state->open_stateid);
a5d16a4d 6120 data->arg.new_lock_owner = 1;
c1d51931 6121 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 6122 } else {
2f74c0a0 6123 data->arg.new_lock_owner = 0;
425c1d4e
TM		 6124 nfs4_stateid_copy(&data->arg.lock_stateid,
6125 &data->lsp->ls_stateid);
6126 }
5d422301
TM		 6127 if (!nfs4_valid_open_stateid(state)) {
6128 data->rpc_status = -EBADF;
6129 task->tk_action = NULL;
6130 goto out_release_open_seqid;
6131 }
26e976a8 6132 data->timestamp = jiffies;
035168ab
TM		 6133 if (nfs4_setup_sequence(data->server,
6134 &data->arg.seq_args,
2240a9e2 6135 &data->res.seq_res,
d9afbd1b 6136 task) == 0)
66179efe 6137 return;
5d422301 6138out_release_open_seqid:
2240a9e2
TM		 6139 nfs_release_seqid(data->arg.open_seqid);
6140out_release_lock_seqid:
6141 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 6142out_wait:
6143 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 6144 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 6145}
6146
a5d16a4d
TM		 6147static void nfs4_lock_done(struct rpc_task *task, void *calldata)
6148{
6149 struct nfs4_lockdata *data = calldata;
39071e6f 6150 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 6151
3110ff80 6152 dprintk("%s: begin!\n", __func__);
a5d16a4d 6153
14516c3a
TM		 6154 if (!nfs4_sequence_done(task, &data->res.seq_res))
6155 return;
66179efe 6156
a5d16a4d 6157 data->rpc_status = task->tk_status;
425c1d4e
TM		 6158 switch (task->tk_status) {
6159 case 0:
2b0143b5 6160 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 6161 data->timestamp);
c69899a1
TM		 6162 if (data->arg.new_lock) {
6163 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
75575ddf 6164 if (locks_lock_inode_wait(lsp->ls_state->inode, &data->fl) < 0) {
c69899a1
TM		 6165 rpc_restart_call_prepare(task);
6166 break;
6167 }
6168 }
39071e6f
TM		 6169 if (data->arg.new_lock_owner != 0) {
6170 nfs_confirm_seqid(&lsp->ls_seqid, 0);
6171 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
6172 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
6173 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
6174 rpc_restart_call_prepare(task);
425c1d4e
TM		 6175 break;
6176 case -NFS4ERR_BAD_STATEID:
6177 case -NFS4ERR_OLD_STATEID:
6178 case -NFS4ERR_STALE_STATEID:
6179 case -NFS4ERR_EXPIRED:
6180 if (data->arg.new_lock_owner != 0) {
6181 if (!nfs4_stateid_match(&data->arg.open_stateid,
6182 &lsp->ls_state->open_stateid))
6183 rpc_restart_call_prepare(task);
6184 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
6185 &lsp->ls_stateid))
6186 rpc_restart_call_prepare(task);
a5d16a4d 6187 }
3110ff80 6188 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 6189}
6190
6191static void nfs4_lock_release(void *calldata)
6192{
6193 struct nfs4_lockdata *data = calldata;
6194
3110ff80 6195 dprintk("%s: begin!\n", __func__);
2f74c0a0 6196 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 6197 if (data->cancelled != 0) {
6198 struct rpc_task *task;
6199 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
6200 data->arg.lock_seqid);
6201 if (!IS_ERR(task))
bf294b41 6202 rpc_put_task_async(task);
3110ff80 6203 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 6204 } else
6205 nfs_free_seqid(data->arg.lock_seqid);
6206 nfs4_put_lock_state(data->lsp);
6207 put_nfs_open_context(data->ctx);
feaff8e5 6208 fput(data->fl.fl_file);
a5d16a4d 6209 kfree(data);
3110ff80 6210 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 6211}
6212
6213static const struct rpc_call_ops nfs4_lock_ops = {
6214 .rpc_call_prepare = nfs4_lock_prepare,
6215 .rpc_call_done = nfs4_lock_done,
6216 .rpc_release = nfs4_lock_release,
6217};
6218
2bee72a6
TM		 6219static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
6220{
2bee72a6
TM		 6221 switch (error) {
6222 case -NFS4ERR_ADMIN_REVOKED:
d7f3e4bf 6223 case -NFS4ERR_EXPIRED:
2bee72a6 6224 case -NFS4ERR_BAD_STATEID:
ecac799a 6225 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 6226 if (new_lock_owner != 0 ||
795a88c9 6227 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 6228 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 6229 break;
6230 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 6231 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a 6232 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 6233 };
6234}
6235
afe6c27c 6236static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 6237{
6238 struct nfs4_lockdata *data;
6239 struct rpc_task *task;
5138fde0
TM		 6240 struct rpc_message msg = {
6241 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
6242 .rpc_cred = state->owner->so_cred,
6243 };
c970aa85
TM		 6244 struct rpc_task_setup task_setup_data = {
6245 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 6246 .rpc_message = &msg,
c970aa85 6247 .callback_ops = &nfs4_lock_ops,
101070ca 6248 .workqueue = nfsiod_workqueue,
c970aa85
TM		 6249 .flags = RPC_TASK_ASYNC,
6250 };
a5d16a4d
TM		 6251 int ret;
6252
3110ff80 6253 dprintk("%s: begin!\n", __func__);
cd3758e3 6254 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 6255 fl->fl_u.nfs4_fl.owner,
6256 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 6257 if (data == NULL)
6258 return -ENOMEM;
6259 if (IS_SETLKW(cmd))
6260 data->arg.block = 1;
a9c92d6b 6261 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 6262 msg.rpc_argp = &data->arg;
6263 msg.rpc_resp = &data->res;
c970aa85 6264 task_setup_data.callback_data = data;
8fe72bac
TM		 6265 if (recovery_type > NFS_LOCK_NEW) {
6266 if (recovery_type == NFS_LOCK_RECLAIM)
6267 data->arg.reclaim = NFS_LOCK_RECLAIM;
6268 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 6269 } else
6270 data->arg.new_lock = 1;
c970aa85 6271 task = rpc_run_task(&task_setup_data);
7a1218a2 6272 if (IS_ERR(task))
a5d16a4d 6273 return PTR_ERR(task);
a5d16a4d
TM		 6274 ret = nfs4_wait_for_completion_rpc_task(task);
6275 if (ret == 0) {
6276 ret = data->rpc_status;
2bee72a6
TM		 6277 if (ret)
6278 nfs4_handle_setlk_error(data->server, data->lsp,
6279 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 6280 } else
6281 data->cancelled = 1;
e6b3c4db 6282 rpc_put_task(task);
3110ff80 6283 dprintk("%s: done, ret = %d!\n", __func__, ret);
48c9579a 6284 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
a5d16a4d 6285 return ret;
1da177e4
LT		 6286}
6287
6288static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
6289{
202b50dc 6290 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6291 struct nfs4_exception exception = {
6292 .inode = state->inode,
6293 };
202b50dc
TM		 6294 int err;
6295
6296 do {
42a2d13e
TM		 6297 /* Cache the lock if possible... */
6298 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6299 return 0;
afe6c27c 6300 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 6301 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 6302 break;
6303 nfs4_handle_exception(server, err, &exception);
6304 } while (exception.retry);
6305 return err;
1da177e4
LT		 6306}
6307
6308static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
6309{
202b50dc 6310 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6311 struct nfs4_exception exception = {
6312 .inode = state->inode,
6313 };
202b50dc
TM		 6314 int err;
6315
6bfc93ef
TM		 6316 err = nfs4_set_lock_state(state, request);
6317 if (err != 0)
6318 return err;
f6de7a39 6319 if (!recover_lost_locks) {
ef1820f9
N		 6320 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
6321 return 0;
6322 }
202b50dc 6323 do {
42a2d13e
TM		 6324 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6325 return 0;
afe6c27c 6326 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 6327 switch (err) {
6328 default:
6329 goto out;
6330 case -NFS4ERR_GRACE:
6331 case -NFS4ERR_DELAY:
6332 nfs4_handle_exception(server, err, &exception);
6333 err = 0;
6334 }
202b50dc 6335 } while (exception.retry);
a9ed2e25 6336out:
202b50dc 6337 return err;
1da177e4
LT		 6338}
6339
f062eb6c 6340#if defined(CONFIG_NFS_V4_1)
b01dd1d8
BS		 6341static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6342{
c5896fc8
TM		 6343 struct nfs4_lock_state *lsp;
6344 int status;
b01dd1d8 6345
c5896fc8
TM		 6346 status = nfs4_set_lock_state(state, request);
6347 if (status != 0)
6348 return status;
6349 lsp = request->fl_u.nfs4_fl.owner;
6350 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) ||
6351 test_bit(NFS_LOCK_LOST, &lsp->ls_flags))
6352 return 0;
6353 status = nfs4_lock_expired(state, request);
eb64cf96 6354 return status;
f062eb6c
BS		 6355}
6356#endif
6357
1da177e4
LT		 6358static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6359{
19e03c57 6360 struct nfs_inode *nfsi = NFS_I(state->inode);
11476e9d 6361 struct nfs4_state_owner *sp = state->owner;
01c3b861 6362 unsigned char fl_flags = request->fl_flags;
1ea67dbd 6363 int status;
1da177e4 6364
01c3b861 6365 request->fl_flags |= FL_ACCESS;
75575ddf 6366 status = locks_lock_inode_wait(state->inode, request);
01c3b861
TM		 6367 if (status < 0)
6368 goto out;
11476e9d 6369 mutex_lock(&sp->so_delegreturn_mutex);
19e03c57 6370 down_read(&nfsi->rwsem);
01c3b861 6371 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6372 /* Yes: cache locks! */
01c3b861 6373 /* ...but avoid races with delegation recall... */
19e03c57 6374 request->fl_flags = fl_flags & ~FL_SLEEP;
75575ddf 6375 status = locks_lock_inode_wait(state->inode, request);
c69899a1 6376 up_read(&nfsi->rwsem);
11476e9d 6377 mutex_unlock(&sp->so_delegreturn_mutex);
9a99af49 6378 goto out;
9a99af49 6379 }
19e03c57 6380 up_read(&nfsi->rwsem);
11476e9d 6381 mutex_unlock(&sp->so_delegreturn_mutex);
c69899a1 6382 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6383out:
6384 request->fl_flags = fl_flags;
1da177e4
LT		 6385 return status;
6386}
6387
6388static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6389{
a1d0b5ee
TM		 6390 struct nfs4_exception exception = {
6391 .state = state,
05ffe24f 6392 .inode = state->inode,
a1d0b5ee 6393 };
1da177e4
LT		 6394 int err;
6395
6396 do {
965b5d67
TM		 6397 err = _nfs4_proc_setlk(state, cmd, request);
6398 if (err == -NFS4ERR_DENIED)
6399 err = -EAGAIN;
1da177e4 6400 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6401 err, &exception);
1da177e4
LT		 6402 } while (exception.retry);
6403 return err;
6404}
6405
d2f3a7f9
JL		 6406#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
6407#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
6408
6409static int
a1d617d8
JL		 6410nfs4_retry_setlk_simple(struct nfs4_state *state, int cmd,
6411 struct file_lock *request)
d2f3a7f9
JL		 6412{
6413 int status = -ERESTARTSYS;
6414 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6415
6416 while(!signalled()) {
6417 status = nfs4_proc_setlk(state, cmd, request);
6418 if ((status != -EAGAIN) || IS_SETLK(cmd))
6419 break;
6420 freezable_schedule_timeout_interruptible(timeout);
6421 timeout *= 2;
6422 timeout = min_t(unsigned long, NFS4_LOCK_MAXTIMEOUT, timeout);
6423 status = -ERESTARTSYS;
6424 }
6425 return status;
6426}
6427
a1d617d8
JL		 6428#ifdef CONFIG_NFS_V4_1
6429struct nfs4_lock_waiter {
6430 struct task_struct *task;
6431 struct inode *inode;
6432 struct nfs_lowner *owner;
6433 bool notified;
6434};
6435
6436static int
6437nfs4_wake_lock_waiter(wait_queue_t *wait, unsigned int mode, int flags, void *key)
6438{
6439 int ret;
6440 struct cb_notify_lock_args *cbnl = key;
6441 struct nfs4_lock_waiter *waiter = wait->private;
6442 struct nfs_lowner *lowner = &cbnl->cbnl_owner,
6443 *wowner = waiter->owner;
6444
6445 /* Only wake if the callback was for the same owner */
6446 if (lowner->clientid != wowner->clientid ||
6447 lowner->id != wowner->id ||
6448 lowner->s_dev != wowner->s_dev)
6449 return 0;
6450
6451 /* Make sure it's for the right inode */
6452 if (nfs_compare_fh(NFS_FH(waiter->inode), &cbnl->cbnl_fh))
6453 return 0;
6454
6455 waiter->notified = true;
6456
6457 /* override "private" so we can use default_wake_function */
6458 wait->private = waiter->task;
6459 ret = autoremove_wake_function(wait, mode, flags, key);
6460 wait->private = waiter;
6461 return ret;
6462}
6463
6464static int
6465nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6466{
6467 int status = -ERESTARTSYS;
6468 unsigned long flags;
6469 struct nfs4_lock_state *lsp = request->fl_u.nfs4_fl.owner;
6470 struct nfs_server *server = NFS_SERVER(state->inode);
6471 struct nfs_client *clp = server->nfs_client;
6472 wait_queue_head_t *q = &clp->cl_lock_waitq;
6473 struct nfs_lowner owner = { .clientid = clp->cl_clientid,
6474 .id = lsp->ls_seqid.owner_id,
6475 .s_dev = server->s_dev };
6476 struct nfs4_lock_waiter waiter = { .task = current,
6477 .inode = state->inode,
6478 .owner = &owner,
6479 .notified = false };
6480 wait_queue_t wait;
6481
6482 /* Don't bother with waitqueue if we don't expect a callback */
6483 if (!test_bit(NFS_STATE_MAY_NOTIFY_LOCK, &state->flags))
6484 return nfs4_retry_setlk_simple(state, cmd, request);
6485
6486 init_wait(&wait);
6487 wait.private = &waiter;
6488 wait.func = nfs4_wake_lock_waiter;
6489 add_wait_queue(q, &wait);
6490
6491 while(!signalled()) {
6492 status = nfs4_proc_setlk(state, cmd, request);
6493 if ((status != -EAGAIN) || IS_SETLK(cmd))
6494 break;
6495
6496 status = -ERESTARTSYS;
6497 spin_lock_irqsave(&q->lock, flags);
6498 if (waiter.notified) {
6499 spin_unlock_irqrestore(&q->lock, flags);
6500 continue;
6501 }
6502 set_current_state(TASK_INTERRUPTIBLE);
6503 spin_unlock_irqrestore(&q->lock, flags);
6504
6505 freezable_schedule_timeout_interruptible(NFS4_LOCK_MAXTIMEOUT);
6506 }
6507
6508 finish_wait(q, &wait);
6509 return status;
6510}
6511#else /* !CONFIG_NFS_V4_1 */
6512static inline int
6513nfs4_retry_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6514{
6515 return nfs4_retry_setlk_simple(state, cmd, request);
6516}
6517#endif
6518
1da177e4
LT		 6519static int
6520nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6521{
6522 struct nfs_open_context *ctx;
6523 struct nfs4_state *state;
1da177e4
LT		 6524 int status;
6525
6526 /* verify open state */
cd3758e3 6527 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6528 state = ctx->state;
6529
6530 if (request->fl_start < 0 || request->fl_end < 0)
6531 return -EINVAL;
6532
d953126a
TM		 6533 if (IS_GETLK(cmd)) {
6534 if (state != NULL)
6535 return nfs4_proc_getlk(state, F_GETLK, request);
6536 return 0;
6537 }
1da177e4
LT		 6538
6539 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6540 return -EINVAL;
6541
d953126a
TM		 6542 if (request->fl_type == F_UNLCK) {
6543 if (state != NULL)
6544 return nfs4_proc_unlck(state, cmd, request);
6545 return 0;
6546 }
1da177e4 6547
d953126a
TM		 6548 if (state == NULL)
6549 return -ENOLCK;
1ea67dbd
JL		 6550
6551 if ((request->fl_flags & FL_POSIX) &&
6552 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6553 return -ENOLCK;
6554
55725513
TM		 6555 /*
6556 * Don't rely on the VFS having checked the file open mode,
6557 * since it won't do this for flock() locks.
6558 */
f44106e2 6559 switch (request->fl_type) {
55725513
TM		 6560 case F_RDLCK:
6561 if (!(filp->f_mode & FMODE_READ))
6562 return -EBADF;
6563 break;
6564 case F_WRLCK:
6565 if (!(filp->f_mode & FMODE_WRITE))
6566 return -EBADF;
6567 }
6568
1ea67dbd
JL		 6569 status = nfs4_set_lock_state(state, request);
6570 if (status != 0)
6571 return status;
6572
d2f3a7f9 6573 return nfs4_retry_setlk(state, cmd, request);
1da177e4
LT		 6574}
6575
db4f2e63 6576int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6577{
6578 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6579 int err;
6580
6581 err = nfs4_set_lock_state(state, fl);
6582 if (err != 0)
db4f2e63 6583 return err;
4a706fa0 6584 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6585 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6586}
6b3b5496 6587
cf470c3e
TM		 6588struct nfs_release_lockowner_data {
6589 struct nfs4_lock_state *lsp;
5ae67c4f 6590 struct nfs_server *server;
cf470c3e 6591 struct nfs_release_lockowner_args args;
b7e63a10 6592 struct nfs_release_lockowner_res res;
60ea6812 6593 unsigned long timestamp;
cf470c3e
TM		 6594};
6595
fbd4bfd1
CL		 6596static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6597{
6598 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6599 struct nfs_server *server = data->server;
cb04ad2a
PT		 6600 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6601 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6602 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6603 data->timestamp = jiffies;
fbd4bfd1
CL		 6604}
6605
6606static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6607{
6608 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6609 struct nfs_server *server = data->server;
6610
b7e63a10 6611 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6612
6613 switch (task->tk_status) {
6614 case 0:
6615 renew_lease(server, data->timestamp);
6616 break;
6617 case -NFS4ERR_STALE_CLIENTID:
6618 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6619 nfs4_schedule_lease_recovery(server->nfs_client);
6620 break;
60ea6812
CL		 6621 case -NFS4ERR_LEASE_MOVED:
6622 case -NFS4ERR_DELAY:
8478eaa1
N		 6623 if (nfs4_async_handle_error(task, server,
6624 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6625 rpc_restart_call_prepare(task);
6626 }
fbd4bfd1
CL		 6627}
6628
d3c7b7cc
TM		 6629static void nfs4_release_lockowner_release(void *calldata)
6630{
cf470c3e 6631 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6632 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6633 kfree(calldata);
6634}
6635
17280175 6636static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6637 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6638 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6639 .rpc_release = nfs4_release_lockowner_release,
6640};
6641
f1cdae87
JL		 6642static void
6643nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6644{
cf470c3e 6645 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6646 struct rpc_message msg = {
6647 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6648 };
6649
6650 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6651 return;
fbd4bfd1 6652
cf470c3e
TM		 6653 data = kmalloc(sizeof(*data), GFP_NOFS);
6654 if (!data)
f1cdae87 6655 return;
cf470c3e 6656 data->lsp = lsp;
5ae67c4f 6657 data->server = server;
cf470c3e
TM		 6658 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6659 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6660 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6661
cf470c3e 6662 msg.rpc_argp = &data->args;
b7e63a10
TM		 6663 msg.rpc_resp = &data->res;
6664 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6665 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6666}
6667
aa1870af
BF		 6668#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6669
d9a82a04 6670static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
59301226
AV		 6671 struct dentry *unused, struct inode *inode,
6672 const char *key, const void *buf,
6673 size_t buflen, int flags)
6b3b5496 6674{
59301226 6675 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 6676}
6677
d9a82a04 6678static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
b296821a
AV		 6679 struct dentry *unused, struct inode *inode,
6680 const char *key, void *buf, size_t buflen)
6b3b5496 6681{
b296821a 6682 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 6683}
6684
764a5c6b 6685static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6b3b5496 6686{
764a5c6b 6687 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6b3b5496
BF		 6688}
6689
c9bccef6 6690#ifdef CONFIG_NFS_V4_SECURITY_LABEL
c9bccef6 6691
d9a82a04 6692static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
59301226
AV		 6693 struct dentry *unused, struct inode *inode,
6694 const char *key, const void *buf,
6695 size_t buflen, int flags)
c9bccef6
DQ		 6696{
6697 if (security_ismaclabel(key))
59301226 6698 return nfs4_set_security_label(inode, buf, buflen);
c9bccef6
DQ		 6699
6700 return -EOPNOTSUPP;
6701}
6702
d9a82a04 6703static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
b296821a
AV		 6704 struct dentry *unused, struct inode *inode,
6705 const char *key, void *buf, size_t buflen)
c9bccef6
DQ		 6706{
6707 if (security_ismaclabel(key))
b296821a 6708 return nfs4_get_security_label(inode, buf, buflen);
c9bccef6
DQ		 6709 return -EOPNOTSUPP;
6710}
6711
c4803c49
AG		 6712static ssize_t
6713nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
c9bccef6 6714{
c4803c49 6715 int len = 0;
c9bccef6 6716
c4803c49
AG		 6717 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
6718 len = security_inode_listsecurity(inode, list, list_len);
6719 if (list_len && len > list_len)
6720 return -ERANGE;
c9bccef6
DQ		 6721 }
6722 return len;
6723}
6724
6725static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6726 .prefix = XATTR_SECURITY_PREFIX,
c9bccef6
DQ		 6727 .get = nfs4_xattr_get_nfs4_label,
6728 .set = nfs4_xattr_set_nfs4_label,
6729};
c9bccef6 6730
c4803c49
AG		 6731#else
6732
6733static ssize_t
6734nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6735{
6736 return 0;
6737}
6738
6739#endif
c9bccef6 6740
533eb461
AA		 6741/*
6742 * nfs_fhget will use either the mounted_on_fileid or the fileid
6743 */
69aaaae1
TM		 6744static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6745{
533eb461
AA		 6746 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6747 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6748 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6749 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6750 return;
6751
6752 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6753 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6754 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6755 fattr->nlink = 2;
6756}
6757
f05d147f
BS		 6758static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6759 const struct qstr *name,
6760 struct nfs4_fs_locations *fs_locations,
6761 struct page *page)
683b57b4
TM		 6762{
6763 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6764 u32 bitmask[3] = {
361e624f 6765 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6766 };
6767 struct nfs4_fs_locations_arg args = {
6768 .dir_fh = NFS_FH(dir),
c228fd3a 6769 .name = name,
683b57b4
TM		 6770 .page = page,
6771 .bitmask = bitmask,
6772 };
22958463
BH		 6773 struct nfs4_fs_locations_res res = {
6774 .fs_locations = fs_locations,
6775 };
683b57b4
TM		 6776 struct rpc_message msg = {
6777 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6778 .rpc_argp = &args,
22958463 6779 .rpc_resp = &res,
683b57b4
TM		 6780 };
6781 int status;
6782
3110ff80 6783 dprintk("%s: start\n", __func__);
533eb461
AA		 6784
6785 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6786 * is not supported */
6787 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6788 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6789 else
6790 bitmask[0] |= FATTR4_WORD0_FILEID;
6791
c228fd3a 6792 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6793 fs_locations->server = server;
830b8e33 6794 fs_locations->nlocations = 0;
f05d147f 6795 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6796 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6797 return status;
6798}
6799
f05d147f
BS		 6800int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6801 const struct qstr *name,
6802 struct nfs4_fs_locations *fs_locations,
6803 struct page *page)
db0a9593
BS		 6804{
6805 struct nfs4_exception exception = { };
6806 int err;
6807 do {
078ea3df
TM		 6808 err = _nfs4_proc_fs_locations(client, dir, name,
6809 fs_locations, page);
6810 trace_nfs4_get_fs_locations(dir, name, err);
6811 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6812 &exception);
6813 } while (exception.retry);
6814 return err;
6815}
6816
b03d735b
CL		 6817/*
6818 * This operation also signals the server that this client is
6819 * performing migration recovery. The server can stop returning
6820 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6821 * appended to this compound to identify the client ID which is
6822 * performing recovery.
6823 */
6824static int _nfs40_proc_get_locations(struct inode *inode,
6825 struct nfs4_fs_locations *locations,
6826 struct page *page, struct rpc_cred *cred)
6827{
6828 struct nfs_server *server = NFS_SERVER(inode);
6829 struct rpc_clnt *clnt = server->client;
6830 u32 bitmask[2] = {
6831 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6832 };
6833 struct nfs4_fs_locations_arg args = {
6834 .clientid = server->nfs_client->cl_clientid,
6835 .fh = NFS_FH(inode),
6836 .page = page,
6837 .bitmask = bitmask,
6838 .migration = 1, /* skip LOOKUP */
6839 .renew = 1, /* append RENEW */
6840 };
6841 struct nfs4_fs_locations_res res = {
6842 .fs_locations = locations,
6843 .migration = 1,
6844 .renew = 1,
6845 };
6846 struct rpc_message msg = {
6847 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6848 .rpc_argp = &args,
6849 .rpc_resp = &res,
6850 .rpc_cred = cred,
6851 };
6852 unsigned long now = jiffies;
6853 int status;
6854
6855 nfs_fattr_init(&locations->fattr);
6856 locations->server = server;
6857 locations->nlocations = 0;
6858
6859 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6860 nfs4_set_sequence_privileged(&args.seq_args);
6861 status = nfs4_call_sync_sequence(clnt, server, &msg,
6862 &args.seq_args, &res.seq_res);
6863 if (status)
6864 return status;
6865
6866 renew_lease(server, now);
6867 return 0;
6868}
6869
6870#ifdef CONFIG_NFS_V4_1
6871
6872/*
6873 * This operation also signals the server that this client is
6874 * performing migration recovery. The server can stop asserting
6875 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6876 * performing this operation is identified in the SEQUENCE
6877 * operation in this compound.
6878 *
6879 * When the client supports GETATTR(fs_locations_info), it can
6880 * be plumbed in here.
6881 */
6882static int _nfs41_proc_get_locations(struct inode *inode,
6883 struct nfs4_fs_locations *locations,
6884 struct page *page, struct rpc_cred *cred)
6885{
6886 struct nfs_server *server = NFS_SERVER(inode);
6887 struct rpc_clnt *clnt = server->client;
6888 u32 bitmask[2] = {
6889 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6890 };
6891 struct nfs4_fs_locations_arg args = {
6892 .fh = NFS_FH(inode),
6893 .page = page,
6894 .bitmask = bitmask,
6895 .migration = 1, /* skip LOOKUP */
6896 };
6897 struct nfs4_fs_locations_res res = {
6898 .fs_locations = locations,
6899 .migration = 1,
6900 };
6901 struct rpc_message msg = {
6902 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6903 .rpc_argp = &args,
6904 .rpc_resp = &res,
6905 .rpc_cred = cred,
6906 };
6907 int status;
6908
6909 nfs_fattr_init(&locations->fattr);
6910 locations->server = server;
6911 locations->nlocations = 0;
6912
6913 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6914 nfs4_set_sequence_privileged(&args.seq_args);
6915 status = nfs4_call_sync_sequence(clnt, server, &msg,
6916 &args.seq_args, &res.seq_res);
6917 if (status == NFS4_OK &&
6918 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6919 status = -NFS4ERR_LEASE_MOVED;
6920 return status;
6921}
6922
6923#endif /* CONFIG_NFS_V4_1 */
6924
6925/**
6926 * nfs4_proc_get_locations - discover locations for a migrated FSID
6927 * @inode: inode on FSID that is migrating
6928 * @locations: result of query
6929 * @page: buffer
6930 * @cred: credential to use for this operation
6931 *
6932 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6933 * operation failed, or a negative errno if a local error occurred.
6934 *
6935 * On success, "locations" is filled in, but if the server has
6936 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6937 * asserted.
6938 *
6939 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6940 * from this client that require migration recovery.
6941 */
6942int nfs4_proc_get_locations(struct inode *inode,
6943 struct nfs4_fs_locations *locations,
6944 struct page *page, struct rpc_cred *cred)
6945{
6946 struct nfs_server *server = NFS_SERVER(inode);
6947 struct nfs_client *clp = server->nfs_client;
6948 const struct nfs4_mig_recovery_ops *ops =
6949 clp->cl_mvops->mig_recovery_ops;
6950 struct nfs4_exception exception = { };
6951 int status;
6952
6953 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6954 (unsigned long long)server->fsid.major,
6955 (unsigned long long)server->fsid.minor,
6956 clp->cl_hostname);
6957 nfs_display_fhandle(NFS_FH(inode), __func__);
6958
6959 do {
6960 status = ops->get_locations(inode, locations, page, cred);
6961 if (status != -NFS4ERR_DELAY)
6962 break;
6963 nfs4_handle_exception(server, status, &exception);
6964 } while (exception.retry);
6965 return status;
6966}
6967
44c99933
CL		 6968/*
6969 * This operation also signals the server that this client is
6970 * performing "lease moved" recovery. The server can stop
6971 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6972 * is appended to this compound to identify the client ID which is
6973 * performing recovery.
6974 */
6975static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6976{
6977 struct nfs_server *server = NFS_SERVER(inode);
6978 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6979 struct rpc_clnt *clnt = server->client;
6980 struct nfs4_fsid_present_arg args = {
6981 .fh = NFS_FH(inode),
6982 .clientid = clp->cl_clientid,
6983 .renew = 1, /* append RENEW */
6984 };
6985 struct nfs4_fsid_present_res res = {
6986 .renew = 1,
6987 };
6988 struct rpc_message msg = {
6989 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6990 .rpc_argp = &args,
6991 .rpc_resp = &res,
6992 .rpc_cred = cred,
6993 };
6994 unsigned long now = jiffies;
6995 int status;
6996
6997 res.fh = nfs_alloc_fhandle();
6998 if (res.fh == NULL)
6999 return -ENOMEM;
7000
7001 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
7002 nfs4_set_sequence_privileged(&args.seq_args);
7003 status = nfs4_call_sync_sequence(clnt, server, &msg,
7004 &args.seq_args, &res.seq_res);
7005 nfs_free_fhandle(res.fh);
7006 if (status)
7007 return status;
7008
7009 do_renew_lease(clp, now);
7010 return 0;
7011}
7012
7013#ifdef CONFIG_NFS_V4_1
7014
7015/*
7016 * This operation also signals the server that this client is
7017 * performing "lease moved" recovery. The server can stop asserting
7018 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
7019 * this operation is identified in the SEQUENCE operation in this
7020 * compound.
7021 */
7022static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7023{
7024 struct nfs_server *server = NFS_SERVER(inode);
7025 struct rpc_clnt *clnt = server->client;
7026 struct nfs4_fsid_present_arg args = {
7027 .fh = NFS_FH(inode),
7028 };
7029 struct nfs4_fsid_present_res res = {
7030 };
7031 struct rpc_message msg = {
7032 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
7033 .rpc_argp = &args,
7034 .rpc_resp = &res,
7035 .rpc_cred = cred,
7036 };
7037 int status;
7038
7039 res.fh = nfs_alloc_fhandle();
7040 if (res.fh == NULL)
7041 return -ENOMEM;
7042
7043 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
7044 nfs4_set_sequence_privileged(&args.seq_args);
7045 status = nfs4_call_sync_sequence(clnt, server, &msg,
7046 &args.seq_args, &res.seq_res);
7047 nfs_free_fhandle(res.fh);
7048 if (status == NFS4_OK &&
7049 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
7050 status = -NFS4ERR_LEASE_MOVED;
7051 return status;
7052}
7053
7054#endif /* CONFIG_NFS_V4_1 */
7055
7056/**
7057 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
7058 * @inode: inode on FSID to check
7059 * @cred: credential to use for this operation
7060 *
7061 * Server indicates whether the FSID is present, moved, or not
7062 * recognized. This operation is necessary to clear a LEASE_MOVED
7063 * condition for this client ID.
7064 *
7065 * Returns NFS4_OK if the FSID is present on this server,
7066 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
7067 * NFS4ERR code if some error occurred on the server, or a
7068 * negative errno if a local failure occurred.
7069 */
7070int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
7071{
7072 struct nfs_server *server = NFS_SERVER(inode);
7073 struct nfs_client *clp = server->nfs_client;
7074 const struct nfs4_mig_recovery_ops *ops =
7075 clp->cl_mvops->mig_recovery_ops;
7076 struct nfs4_exception exception = { };
7077 int status;
7078
7079 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
7080 (unsigned long long)server->fsid.major,
7081 (unsigned long long)server->fsid.minor,
7082 clp->cl_hostname);
7083 nfs_display_fhandle(NFS_FH(inode), __func__);
7084
7085 do {
7086 status = ops->fsid_present(inode, cred);
7087 if (status != -NFS4ERR_DELAY)
7088 break;
7089 nfs4_handle_exception(server, status, &exception);
7090 } while (exception.retry);
7091 return status;
7092}
7093
5ec16a85 7094/**
a5250def
WAA		 7095 * If 'use_integrity' is true and the state managment nfs_client
7096 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
7097 * and the machine credential as per RFC3530bis and RFC5661 Security
7098 * Considerations sections. Otherwise, just use the user cred with the
7099 * filesystem's rpc_client.
5ec16a85 7100 */
a5250def 7101static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 7102{
7103 int status;
7104 struct nfs4_secinfo_arg args = {
7105 .dir_fh = NFS_FH(dir),
7106 .name = name,
7107 };
7108 struct nfs4_secinfo_res res = {
7109 .flavors = flavors,
7110 };
7111 struct rpc_message msg = {
7112 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
7113 .rpc_argp = &args,
7114 .rpc_resp = &res,
7115 };
a5250def 7116 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 7117 struct rpc_cred *cred = NULL;
a5250def
WAA		 7118
7119 if (use_integrity) {
7120 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 7121 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
7122 msg.rpc_cred = cred;
a5250def 7123 }
5a5ea0d4
BS		 7124
7125 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 7126
7127 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
7128 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
7129
a5250def
WAA		 7130 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
7131 &res.seq_res, 0);
5a5ea0d4 7132 dprintk("NFS reply secinfo: %d\n", status);
a5250def 7133
7cb852df
WAA		 7134 if (cred)
7135 put_rpccred(cred);
a5250def 7136
5a5ea0d4
BS		 7137 return status;
7138}
7139
72de53ec
BS		 7140int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
7141 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 7142{
7143 struct nfs4_exception exception = { };
7144 int err;
7145 do {
a5250def
WAA		 7146 err = -NFS4ERR_WRONGSEC;
7147
7148 /* try to use integrity protection with machine cred */
7149 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
7150 err = _nfs4_proc_secinfo(dir, name, flavors, true);
7151
7152 /*
7153 * if unable to use integrity protection, or SECINFO with
7154 * integrity protection returns NFS4ERR_WRONGSEC (which is
7155 * disallowed by spec, but exists in deployed servers) use
7156 * the current filesystem's rpc_client and the user cred.
7157 */
7158 if (err == -NFS4ERR_WRONGSEC)
7159 err = _nfs4_proc_secinfo(dir, name, flavors, false);
7160
078ea3df
TM		 7161 trace_nfs4_secinfo(dir, name, err);
7162 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 7163 &exception);
7164 } while (exception.retry);
7165 return err;
7166}
7167
557134a3 7168#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 7169/*
7170 * Check the exchange flags returned by the server for invalid flags, having
7171 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
7172 * DS flags set.
7173 */
7174static int nfs4_check_cl_exchange_flags(u32 flags)
7175{
7176 if (flags & ~EXCHGID4_FLAG_MASK_R)
7177 goto out_inval;
7178 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
7179 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
7180 goto out_inval;
7181 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
7182 goto out_inval;
7183 return NFS_OK;
7184out_inval:
7185 return -NFS4ERR_INVAL;
7186}
7187
78fe0f41 7188static bool
79d4e1f0
CL		 7189nfs41_same_server_scope(struct nfs41_server_scope *a,
7190 struct nfs41_server_scope *b)
78fe0f41
WAA		 7191{
7192 if (a->server_scope_sz == b->server_scope_sz &&
7193 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
7194 return true;
7195
7196 return false;
7197}
7198
02a95dee
AA		 7199static void
7200nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
7201{
7202}
7203
7204static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
7205 .rpc_call_done = &nfs4_bind_one_conn_to_session_done,
7206};
7207
7c44f1ae 7208/*
d9ddbf5d 7209 * nfs4_proc_bind_one_conn_to_session()
7c44f1ae
WAA		 7210 *
7211 * The 4.1 client currently uses the same TCP connection for the
7212 * fore and backchannel.
7213 */
d9ddbf5d
TM		 7214static
7215int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
7216 struct rpc_xprt *xprt,
7217 struct nfs_client *clp,
7218 struct rpc_cred *cred)
7c44f1ae
WAA		 7219{
7220 int status;
71a097c6
TM		 7221 struct nfs41_bind_conn_to_session_args args = {
7222 .client = clp,
7223 .dir = NFS4_CDFC4_FORE_OR_BOTH,
7224 };
7c44f1ae
WAA		 7225 struct nfs41_bind_conn_to_session_res res;
7226 struct rpc_message msg = {
7227 .rpc_proc =
7228 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 7229 .rpc_argp = &args,
7c44f1ae 7230 .rpc_resp = &res,
2cf047c9 7231 .rpc_cred = cred,
7c44f1ae 7232 };
d9ddbf5d
TM		 7233 struct rpc_task_setup task_setup_data = {
7234 .rpc_client = clnt,
7235 .rpc_xprt = xprt,
02a95dee 7236 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
d9ddbf5d
TM		 7237 .rpc_message = &msg,
7238 .flags = RPC_TASK_TIMEOUT,
7239 };
7240 struct rpc_task *task;
7c44f1ae
WAA		 7241
7242 dprintk("--> %s\n", __func__);
7c44f1ae 7243
71a097c6
TM		 7244 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
7245 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
7246 args.dir = NFS4_CDFC4_FORE;
7c44f1ae 7247
d9ddbf5d
TM		 7248 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
7249 if (xprt != rcu_access_pointer(clnt->cl_xprt))
7250 args.dir = NFS4_CDFC4_FORE;
7251
7252 task = rpc_run_task(&task_setup_data);
7253 if (!IS_ERR(task)) {
7254 status = task->tk_status;
7255 rpc_put_task(task);
7256 } else
7257 status = PTR_ERR(task);
c6d01c6f 7258 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 7259 if (status == 0) {
71a097c6 7260 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 7261 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
7262 dprintk("NFS: %s: Session ID mismatch\n", __func__);
7263 status = -EIO;
71a097c6 7264 goto out;
7c44f1ae 7265 }
71a097c6 7266 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 7267 dprintk("NFS: %s: Unexpected direction from server\n",
7268 __func__);
7269 status = -EIO;
71a097c6 7270 goto out;
7c44f1ae 7271 }
71a097c6 7272 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 7273 dprintk("NFS: %s: Server returned RDMA mode = true\n",
7274 __func__);
7275 status = -EIO;
71a097c6 7276 goto out;
7c44f1ae
WAA		 7277 }
7278 }
7c44f1ae
WAA		 7279out:
7280 dprintk("<-- %s status= %d\n", __func__, status);
7281 return status;
7282}
7283
d9ddbf5d
TM		 7284struct rpc_bind_conn_calldata {
7285 struct nfs_client *clp;
7286 struct rpc_cred *cred;
7287};
7288
7289static int
7290nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
7291 struct rpc_xprt *xprt,
7292 void *calldata)
7293{
7294 struct rpc_bind_conn_calldata *p = calldata;
7295
7296 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
7297}
7298
7299int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7300{
7301 struct rpc_bind_conn_calldata data = {
7302 .clp = clp,
7303 .cred = cred,
7304 };
7305 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
7306 nfs4_proc_bind_conn_to_session_callback, &data);
7307}
7308
99fe60d0 7309/*
fa940720
WAA		 7310 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
7311 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 7312 */
7313static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
7314 .how = SP4_MACH_CRED,
7315 .enforce.u.words = {
7316 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7317 1 << (OP_EXCHANGE_ID - 32) |
7318 1 << (OP_CREATE_SESSION - 32) |
7319 1 << (OP_DESTROY_SESSION - 32) |
7320 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 7321 },
7322 .allow.u.words = {
7323 [0] = 1 << (OP_CLOSE) |
99ade3c7 7324 1 << (OP_OPEN_DOWNGRADE) |
a0279625 7325 1 << (OP_LOCKU) |
99ade3c7 7326 1 << (OP_DELEGRETURN) |
a0279625 7327 1 << (OP_COMMIT),
8b5bee2e 7328 [1] = 1 << (OP_SECINFO - 32) |
3787d506 7329 1 << (OP_SECINFO_NO_NAME - 32) |
99ade3c7 7330 1 << (OP_LAYOUTRETURN - 32) |
3787d506 7331 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 7332 1 << (OP_FREE_STATEID - 32) |
7333 1 << (OP_WRITE - 32)
2031cd1a
WAA		 7334 }
7335};
7336
7337/*
7338 * Select the state protection mode for client `clp' given the server results
7339 * from exchange_id in `sp'.
99fe60d0 7340 *
2031cd1a
WAA		 7341 * Returns 0 on success, negative errno otherwise.
7342 */
7343static int nfs4_sp4_select_mode(struct nfs_client *clp,
7344 struct nfs41_state_protection *sp)
7345{
7346 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
7347 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7348 1 << (OP_EXCHANGE_ID - 32) |
7349 1 << (OP_CREATE_SESSION - 32) |
7350 1 << (OP_DESTROY_SESSION - 32) |
7351 1 << (OP_DESTROY_CLIENTID - 32)
7352 };
7353 unsigned int i;
7354
7355 if (sp->how == SP4_MACH_CRED) {
7356 /* Print state protect result */
7357 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
7358 for (i = 0; i <= LAST_NFS4_OP; i++) {
7359 if (test_bit(i, sp->enforce.u.longs))
7360 dfprintk(MOUNT, " enforce op %d\n", i);
7361 if (test_bit(i, sp->allow.u.longs))
7362 dfprintk(MOUNT, " allow op %d\n", i);
7363 }
7364
7365 /* make sure nothing is on enforce list that isn't supported */
7366 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
7367 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
7368 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7369 return -EINVAL;
7370 }
7371 }
7372
7373 /*
7374 * Minimal mode - state operations are allowed to use machine
7375 * credential. Note this already happens by default, so the
7376 * client doesn't have to do anything more than the negotiation.
7377 *
7378 * NOTE: we don't care if EXCHANGE_ID is in the list -
7379 * we're already using the machine cred for exchange_id
7380 * and will never use a different cred.
7381 */
7382 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
7383 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
7384 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
7385 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
7386 dfprintk(MOUNT, "sp4_mach_cred:\n");
7387 dfprintk(MOUNT, " minimal mode enabled\n");
7388 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
7389 } else {
7390 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7391 return -EINVAL;
7392 }
fa940720
WAA		 7393
7394 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
99ade3c7
AE		 7395 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
7396 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
fa940720
WAA		 7397 test_bit(OP_LOCKU, sp->allow.u.longs)) {
7398 dfprintk(MOUNT, " cleanup mode enabled\n");
7399 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
7400 }
8b5bee2e 7401
99ade3c7
AE		 7402 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
7403 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
7404 set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP,
7405 &clp->cl_sp4_flags);
7406 }
7407
8b5bee2e
WAA		 7408 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
7409 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
7410 dfprintk(MOUNT, " secinfo mode enabled\n");
7411 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
7412 }
3787d506
WAA		 7413
7414 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
7415 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
7416 dfprintk(MOUNT, " stateid mode enabled\n");
7417 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
7418 }
8c21c62c
WAA		 7419
7420 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
7421 dfprintk(MOUNT, " write mode enabled\n");
7422 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
7423 }
7424
7425 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
7426 dfprintk(MOUNT, " commit mode enabled\n");
7427 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
7428 }
2031cd1a
WAA		 7429 }
7430
7431 return 0;
7432}
7433
8d89bd70
AA		 7434struct nfs41_exchange_id_data {
7435 struct nfs41_exchange_id_res res;
7436 struct nfs41_exchange_id_args args;
ad0849a7 7437 struct rpc_xprt *xprt;
8d89bd70
AA		 7438 int rpc_status;
7439};
7440
7441static void nfs4_exchange_id_done(struct rpc_task *task, void *data)
7442{
7443 struct nfs41_exchange_id_data *cdata =
7444 (struct nfs41_exchange_id_data *)data;
7445 struct nfs_client *clp = cdata->args.client;
7446 int status = task->tk_status;
7447
7448 trace_nfs4_exchange_id(clp, status);
7449
7450 if (status == 0)
7451 status = nfs4_check_cl_exchange_flags(cdata->res.flags);
ad0849a7
AA		 7452
7453 if (cdata->xprt && status == 0) {
7454 status = nfs4_detect_session_trunking(clp, &cdata->res,
7455 cdata->xprt);
7456 goto out;
7457 }
7458
8d89bd70
AA		 7459 if (status == 0)
7460 status = nfs4_sp4_select_mode(clp, &cdata->res.state_protect);
7461
7462 if (status == 0) {
7463 clp->cl_clientid = cdata->res.clientid;
7464 clp->cl_exchange_flags = cdata->res.flags;
7465 /* Client ID is not confirmed */
7466 if (!(cdata->res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7467 clear_bit(NFS4_SESSION_ESTABLISHED,
7468 &clp->cl_session->session_state);
7469 clp->cl_seqid = cdata->res.seqid;
7470 }
7471
7472 kfree(clp->cl_serverowner);
7473 clp->cl_serverowner = cdata->res.server_owner;
7474 cdata->res.server_owner = NULL;
7475
7476 /* use the most recent implementation id */
7477 kfree(clp->cl_implid);
7478 clp->cl_implid = cdata->res.impl_id;
7479 cdata->res.impl_id = NULL;
7480
7481 if (clp->cl_serverscope != NULL &&
7482 !nfs41_same_server_scope(clp->cl_serverscope,
7483 cdata->res.server_scope)) {
7484 dprintk("%s: server_scope mismatch detected\n",
7485 __func__);
7486 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
7487 kfree(clp->cl_serverscope);
7488 clp->cl_serverscope = NULL;
7489 }
7490
7491 if (clp->cl_serverscope == NULL) {
7492 clp->cl_serverscope = cdata->res.server_scope;
7493 cdata->res.server_scope = NULL;
7494 }
ad0849a7
AA		 7495 /* Save the EXCHANGE_ID verifier session trunk tests */
7496 memcpy(clp->cl_confirm.data, cdata->args.verifier->data,
7497 sizeof(clp->cl_confirm.data));
8d89bd70 7498 }
ad0849a7 7499out:
8d89bd70 7500 cdata->rpc_status = status;
ad0849a7 7501 return;
8d89bd70
AA		 7502}
7503
7504static void nfs4_exchange_id_release(void *data)
7505{
7506 struct nfs41_exchange_id_data *cdata =
7507 (struct nfs41_exchange_id_data *)data;
7508
7509 nfs_put_client(cdata->args.client);
ad0849a7
AA		 7510 if (cdata->xprt) {
7511 xprt_put(cdata->xprt);
7512 rpc_clnt_xprt_switch_put(cdata->args.client->cl_rpcclient);
7513 }
8d89bd70
AA		 7514 kfree(cdata->res.impl_id);
7515 kfree(cdata->res.server_scope);
7516 kfree(cdata->res.server_owner);
7517 kfree(cdata);
7518}
7519
7520static const struct rpc_call_ops nfs4_exchange_id_call_ops = {
7521 .rpc_call_done = nfs4_exchange_id_done,
7522 .rpc_release = nfs4_exchange_id_release,
7523};
7524
2031cd1a
WAA		 7525/*
7526 * _nfs4_proc_exchange_id()
6bbb4ae8 7527 *
2031cd1a 7528 * Wrapper for EXCHANGE_ID operation.
99fe60d0 7529 */
2031cd1a 7530static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
ad0849a7 7531 u32 sp4_how, struct rpc_xprt *xprt)
99fe60d0
BH		 7532{
7533 nfs4_verifier verifier;
99fe60d0
BH		 7534 struct rpc_message msg = {
7535 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
99fe60d0
BH		 7536 .rpc_cred = cred,
7537 };
8d89bd70
AA		 7538 struct rpc_task_setup task_setup_data = {
7539 .rpc_client = clp->cl_rpcclient,
7540 .callback_ops = &nfs4_exchange_id_call_ops,
7541 .rpc_message = &msg,
7542 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
7543 };
7544 struct nfs41_exchange_id_data *calldata;
7545 struct rpc_task *task;
7546 int status = -EIO;
7547
7548 if (!atomic_inc_not_zero(&clp->cl_count))
7549 goto out;
7550
7551 status = -ENOMEM;
7552 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
7553 if (!calldata)
7554 goto out;
99fe60d0 7555
ad0849a7
AA		 7556 if (!xprt)
7557 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 7558
7559 status = nfs4_init_uniform_client_string(clp);
7560 if (status)
8d89bd70 7561 goto out_calldata;
3a6bb738
JL		 7562
7563 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6bbb4ae8 7564 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 7565 clp->cl_owner_id);
99fe60d0 7566
8d89bd70
AA		 7567 calldata->res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
7568 GFP_NOFS);
7569 status = -ENOMEM;
7570 if (unlikely(calldata->res.server_owner == NULL))
7571 goto out_calldata;
78fe0f41 7572
8d89bd70 7573 calldata->res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 7574 GFP_NOFS);
8d89bd70 7575 if (unlikely(calldata->res.server_scope == NULL))
acdeb69d 7576 goto out_server_owner;
78fe0f41 7577
8d89bd70
AA		 7578 calldata->res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
7579 if (unlikely(calldata->res.impl_id == NULL))
7d2ed9ac 7580 goto out_server_scope;
7d2ed9ac 7581
2031cd1a
WAA		 7582 switch (sp4_how) {
7583 case SP4_NONE:
8d89bd70 7584 calldata->args.state_protect.how = SP4_NONE;
2031cd1a
WAA		 7585 break;
7586
7587 case SP4_MACH_CRED:
8d89bd70 7588 calldata->args.state_protect = nfs4_sp4_mach_cred_request;
2031cd1a
WAA		 7589 break;
7590
7591 default:
7592 /* unsupported! */
7593 WARN_ON_ONCE(1);
7594 status = -EINVAL;
6b55970b 7595 goto out_impl_id;
2031cd1a 7596 }
ad0849a7
AA		 7597 if (xprt) {
7598 calldata->xprt = xprt;
7599 task_setup_data.rpc_xprt = xprt;
7600 task_setup_data.flags =
7601 RPC_TASK_SOFT|RPC_TASK_SOFTCONN|RPC_TASK_ASYNC;
7602 calldata->args.verifier = &clp->cl_confirm;
7603 } else {
7604 calldata->args.verifier = &verifier;
7605 }
8d89bd70
AA		 7606 calldata->args.client = clp;
7607#ifdef CONFIG_NFS_V4_1_MIGRATION
7608 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7609 EXCHGID4_FLAG_BIND_PRINC_STATEID |
7610 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
7611#else
7612 calldata->args.flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7613 EXCHGID4_FLAG_BIND_PRINC_STATEID,
7614#endif
7615 msg.rpc_argp = &calldata->args;
7616 msg.rpc_resp = &calldata->res;
7617 task_setup_data.callback_data = calldata;
2031cd1a 7618
8d89bd70
AA		 7619 task = rpc_run_task(&task_setup_data);
7620 if (IS_ERR(task)) {
7621 status = PTR_ERR(task);
7622 goto out_impl_id;
6b55970b 7623 }
7d2ed9ac 7624
ad0849a7
AA		 7625 if (!xprt) {
7626 status = rpc_wait_for_completion_task(task);
7627 if (!status)
7628 status = calldata->rpc_status;
7629 } else /* session trunking test */
8d89bd70 7630 status = calldata->rpc_status;
ad0849a7 7631
8d89bd70 7632 rpc_put_task(task);
abe9a6d5 7633out:
177313f1 7634 if (clp->cl_implid != NULL)
6bbb4ae8 7635 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 7636 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 7637 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 7638 clp->cl_implid->date.seconds,
7639 clp->cl_implid->date.nseconds);
6bbb4ae8 7640 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0 7641 return status;
8d89bd70
AA		 7642
7643out_impl_id:
7644 kfree(calldata->res.impl_id);
7645out_server_scope:
7646 kfree(calldata->res.server_scope);
7647out_server_owner:
7648 kfree(calldata->res.server_owner);
7649out_calldata:
7650 kfree(calldata);
7651 goto out;
99fe60d0
BH		 7652}
7653
2031cd1a
WAA		 7654/*
7655 * nfs4_proc_exchange_id()
7656 *
7657 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7658 *
7659 * Since the clientid has expired, all compounds using sessions
7660 * associated with the stale clientid will be returning
7661 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7662 * be in some phase of session reset.
7663 *
7664 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7665 */
7666int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7667{
7668 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7669 int status;
7670
7671 /* try SP4_MACH_CRED if krb5i/p */
7672 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7673 authflavor == RPC_AUTH_GSS_KRB5P) {
ad0849a7 7674 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED, NULL);
2031cd1a
WAA		 7675 if (!status)
7676 return 0;
7677 }
7678
7679 /* try SP4_NONE */
ad0849a7 7680 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE, NULL);
2031cd1a
WAA		 7681}
7682
04fa2c6b
AA		 7683/**
7684 * nfs4_test_session_trunk
7685 *
7686 * This is an add_xprt_test() test function called from
7687 * rpc_clnt_setup_test_and_add_xprt.
7688 *
7689 * The rpc_xprt_switch is referrenced by rpc_clnt_setup_test_and_add_xprt
7690 * and is dereferrenced in nfs4_exchange_id_release
7691 *
7692 * Upon success, add the new transport to the rpc_clnt
7693 *
7694 * @clnt: struct rpc_clnt to get new transport
7695 * @xprt: the rpc_xprt to test
7696 * @data: call data for _nfs4_proc_exchange_id.
7697 */
7698int nfs4_test_session_trunk(struct rpc_clnt *clnt, struct rpc_xprt *xprt,
7699 void *data)
7700{
7701 struct nfs4_add_xprt_data *adata = (struct nfs4_add_xprt_data *)data;
7702 u32 sp4_how;
7703
7704 dprintk("--> %s try %s\n", __func__,
7705 xprt->address_strings[RPC_DISPLAY_ADDR]);
7706
7707 sp4_how = (adata->clp->cl_sp4_flags == 0 ? SP4_NONE : SP4_MACH_CRED);
7708
7709 /* Test connection for session trunking. Async exchange_id call */
7710 return _nfs4_proc_exchange_id(adata->clp, adata->cred, sp4_how, xprt);
2031cd1a 7711}
04fa2c6b 7712EXPORT_SYMBOL_GPL(nfs4_test_session_trunk);
2031cd1a 7713
66245539
TM		 7714static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7715 struct rpc_cred *cred)
7716{
7717 struct rpc_message msg = {
7718 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7719 .rpc_argp = clp,
7720 .rpc_cred = cred,
7721 };
7722 int status;
7723
7724 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7725 trace_nfs4_destroy_clientid(clp, status);
66245539 7726 if (status)
02c67525 7727 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7728 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7729 return status;
7730}
7731
7732static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7733 struct rpc_cred *cred)
7734{
7735 unsigned int loop;
7736 int ret;
7737
7738 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7739 ret = _nfs4_proc_destroy_clientid(clp, cred);
7740 switch (ret) {
7741 case -NFS4ERR_DELAY:
7742 case -NFS4ERR_CLIENTID_BUSY:
7743 ssleep(1);
7744 break;
7745 default:
7746 return ret;
7747 }
7748 }
7749 return 0;
7750}
7751
7752int nfs4_destroy_clientid(struct nfs_client *clp)
7753{
7754 struct rpc_cred *cred;
7755 int ret = 0;
7756
7757 if (clp->cl_mvops->minor_version < 1)
7758 goto out;
7759 if (clp->cl_exchange_flags == 0)
7760 goto out;
05f4c350
CL		 7761 if (clp->cl_preserve_clid)
7762 goto out;
73d8bde5 7763 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7764 ret = nfs4_proc_destroy_clientid(clp, cred);
7765 if (cred)
7766 put_rpccred(cred);
7767 switch (ret) {
7768 case 0:
7769 case -NFS4ERR_STALE_CLIENTID:
7770 clp->cl_exchange_flags = 0;
7771 }
7772out:
7773 return ret;
7774}
7775
2050f0cc
AA		 7776struct nfs4_get_lease_time_data {
7777 struct nfs4_get_lease_time_args *args;
7778 struct nfs4_get_lease_time_res *res;
7779 struct nfs_client *clp;
7780};
7781
7782static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7783 void *calldata)
7784{
2050f0cc
AA		 7785 struct nfs4_get_lease_time_data *data =
7786 (struct nfs4_get_lease_time_data *)calldata;
7787
7788 dprintk("--> %s\n", __func__);
7789 /* just setup sequence, do not trigger session recovery
7790 since we're invoked within one */
d9afbd1b
TM		 7791 nfs41_setup_sequence(data->clp->cl_session,
7792 &data->args->la_seq_args,
7793 &data->res->lr_seq_res,
7794 task);
2050f0cc
AA		 7795 dprintk("<-- %s\n", __func__);
7796}
7797
7798/*
7799 * Called from nfs4_state_manager thread for session setup, so don't recover
7800 * from sequence operation or clientid errors.
7801 */
7802static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7803{
7804 struct nfs4_get_lease_time_data *data =
7805 (struct nfs4_get_lease_time_data *)calldata;
7806
7807 dprintk("--> %s\n", __func__);
14516c3a
TM		 7808 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7809 return;
2050f0cc
AA		 7810 switch (task->tk_status) {
7811 case -NFS4ERR_DELAY:
7812 case -NFS4ERR_GRACE:
7813 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7814 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7815 task->tk_status = 0;
a8a4ae3a
AA		 7816 /* fall through */
7817 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7818 rpc_restart_call_prepare(task);
2050f0cc
AA		 7819 return;
7820 }
2050f0cc
AA		 7821 dprintk("<-- %s\n", __func__);
7822}
7823
17280175 7824static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7825 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7826 .rpc_call_done = nfs4_get_lease_time_done,
7827};
7828
7829int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7830{
7831 struct rpc_task *task;
7832 struct nfs4_get_lease_time_args args;
7833 struct nfs4_get_lease_time_res res = {
7834 .lr_fsinfo = fsinfo,
7835 };
7836 struct nfs4_get_lease_time_data data = {
7837 .args = &args,
7838 .res = &res,
7839 .clp = clp,
7840 };
7841 struct rpc_message msg = {
7842 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7843 .rpc_argp = &args,
7844 .rpc_resp = &res,
7845 };
7846 struct rpc_task_setup task_setup = {
7847 .rpc_client = clp->cl_rpcclient,
7848 .rpc_message = &msg,
7849 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7850 .callback_data = &data,
7851 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7852 };
7853 int status;
7854
a9c92d6b 7855 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7856 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7857 dprintk("--> %s\n", __func__);
7858 task = rpc_run_task(&task_setup);
7859
7860 if (IS_ERR(task))
7861 status = PTR_ERR(task);
7862 else {
7863 status = task->tk_status;
7864 rpc_put_task(task);
7865 }
7866 dprintk("<-- %s return %d\n", __func__, status);
7867
7868 return status;
7869}
7870
fc931582
AA		 7871/*
7872 * Initialize the values to be used by the client in CREATE_SESSION
7873 * If nfs4_init_session set the fore channel request and response sizes,
7874 * use them.
7875 *
7876 * Set the back channel max_resp_sz_cached to zero to force the client to
7877 * always set csa_cachethis to FALSE because the current implementation
7878 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7879 */
6b26cc8c
CL		 7880static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
7881 struct rpc_clnt *clnt)
fc931582 7882{
18aad3d5 7883 unsigned int max_rqst_sz, max_resp_sz;
6b26cc8c 7884 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
18aad3d5
AA		 7885
7886 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7887 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7888
fc931582 7889 /* Fore channel attributes */
18aad3d5
AA		 7890 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7891 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7892 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7893 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7894
7895 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7896 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7897 __func__,
7898 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7899 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7900
7901 /* Back channel attributes */
6b26cc8c
CL		 7902 args->bc_attrs.max_rqst_sz = max_bc_payload;
7903 args->bc_attrs.max_resp_sz = max_bc_payload;
fc931582
AA		 7904 args->bc_attrs.max_resp_sz_cached = 0;
7905 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
5405fc44 7906 args->bc_attrs.max_reqs = min_t(unsigned short, max_session_cb_slots, 1);
fc931582
AA		 7907
7908 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7909 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7910 __func__,
7911 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7912 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7913 args->bc_attrs.max_reqs);
7914}
7915
79969dd1
TM		 7916static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7917 struct nfs41_create_session_res *res)
8d35301d 7918{
43c2e885 7919 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7920 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7921
43c2e885
BF		 7922 if (rcvd->max_resp_sz > sent->max_resp_sz)
7923 return -EINVAL;
7924 /*
7925 * Our requested max_ops is the minimum we need; we're not
7926 * prepared to break up compounds into smaller pieces than that.
7927 * So, no point even trying to continue if the server won't
7928 * cooperate:
7929 */
7930 if (rcvd->max_ops < sent->max_ops)
7931 return -EINVAL;
7932 if (rcvd->max_reqs == 0)
7933 return -EINVAL;
b4b9a0c1
VG		 7934 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7935 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7936 return 0;
8d35301d
AA		 7937}
7938
79969dd1
TM		 7939static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7940 struct nfs41_create_session_res *res)
43c2e885
BF		 7941{
7942 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7943 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7944
b1c0df5f
TM		 7945 if (!(res->flags & SESSION4_BACK_CHAN))
7946 goto out;
43c2e885
BF		 7947 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7948 return -EINVAL;
7949 if (rcvd->max_resp_sz < sent->max_resp_sz)
7950 return -EINVAL;
7951 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7952 return -EINVAL;
5405fc44 7953 if (rcvd->max_ops > sent->max_ops)
43c2e885 7954 return -EINVAL;
5405fc44 7955 if (rcvd->max_reqs > sent->max_reqs)
43c2e885 7956 return -EINVAL;
b1c0df5f 7957out:
43c2e885
BF		 7958 return 0;
7959}
8d35301d 7960
8d35301d 7961static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7962 struct nfs41_create_session_res *res)
8d35301d 7963{
43c2e885 7964 int ret;
8d35301d 7965
79969dd1 7966 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7967 if (ret)
7968 return ret;
79969dd1
TM		 7969 return nfs4_verify_back_channel_attrs(args, res);
7970}
7971
7972static void nfs4_update_session(struct nfs4_session *session,
7973 struct nfs41_create_session_res *res)
7974{
7975 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7976 /* Mark client id and session as being confirmed */
7977 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7978 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7979 session->flags = res->flags;
7980 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7981 if (res->flags & SESSION4_BACK_CHAN)
7982 memcpy(&session->bc_attrs, &res->bc_attrs,
7983 sizeof(session->bc_attrs));
8d35301d
AA		 7984}
7985
848f5bda
TM		 7986static int _nfs4_proc_create_session(struct nfs_client *clp,
7987 struct rpc_cred *cred)
fc931582
AA		 7988{
7989 struct nfs4_session *session = clp->cl_session;
7990 struct nfs41_create_session_args args = {
7991 .client = clp,
79969dd1
TM		 7992 .clientid = clp->cl_clientid,
7993 .seqid = clp->cl_seqid,
fc931582
AA		 7994 .cb_program = NFS4_CALLBACK,
7995 };
79969dd1
TM		 7996 struct nfs41_create_session_res res;
7997
fc931582
AA		 7998 struct rpc_message msg = {
7999 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
8000 .rpc_argp = &args,
8001 .rpc_resp = &res,
848f5bda 8002 .rpc_cred = cred,
fc931582
AA		 8003 };
8004 int status;
8005
6b26cc8c 8006 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
0f91421e 8007 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 8008
1bd714f2 8009 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 8010 trace_nfs4_create_session(clp, status);
fc931582 8011
b519d408
TM		 8012 switch (status) {
8013 case -NFS4ERR_STALE_CLIENTID:
8014 case -NFS4ERR_DELAY:
8015 case -ETIMEDOUT:
8016 case -EACCES:
8017 case -EAGAIN:
8018 goto out;
8019 };
8020
8021 clp->cl_seqid++;
43095d39 8022 if (!status) {
8d35301d 8023 /* Verify the session's negotiated channel_attrs values */
79969dd1 8024 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 8025 /* Increment the clientid slot sequence id */
79969dd1
TM		 8026 if (status)
8027 goto out;
8028 nfs4_update_session(session, &res);
fc931582 8029 }
79969dd1 8030out:
fc931582
AA		 8031 return status;
8032}
8033
8034/*
8035 * Issues a CREATE_SESSION operation to the server.
8036 * It is the responsibility of the caller to verify the session is
8037 * expired before calling this routine.
8038 */
848f5bda 8039int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 8040{
8041 int status;
8042 unsigned *ptr;
fc931582
AA		 8043 struct nfs4_session *session = clp->cl_session;
8044
8045 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
8046
848f5bda 8047 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 8048 if (status)
8049 goto out;
8050
aacd5537
AA		 8051 /* Init or reset the session slot tables */
8052 status = nfs4_setup_session_slot_tables(session);
8053 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 8054 if (status)
8055 goto out;
8056
8057 ptr = (unsigned *)&session->sess_id.data[0];
8058 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
8059 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 8060out:
8061 dprintk("<-- %s\n", __func__);
8062 return status;
8063}
8064
0f3e66c6
AA		 8065/*
8066 * Issue the over-the-wire RPC DESTROY_SESSION.
8067 * The caller must serialize access to this routine.
8068 */
848f5bda
TM		 8069int nfs4_proc_destroy_session(struct nfs4_session *session,
8070 struct rpc_cred *cred)
0f3e66c6 8071{
848f5bda
TM		 8072 struct rpc_message msg = {
8073 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
8074 .rpc_argp = session,
8075 .rpc_cred = cred,
8076 };
0f3e66c6 8077 int status = 0;
0f3e66c6
AA		 8078
8079 dprintk("--> nfs4_proc_destroy_session\n");
8080
8081 /* session is still being setup */
e11259f9
TM		 8082 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
8083 return 0;
0f3e66c6 8084
1bd714f2 8085 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 8086 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 8087
8088 if (status)
08106ac7 8089 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 8090 "Session has been destroyed regardless...\n", status);
8091
8092 dprintk("<-- nfs4_proc_destroy_session\n");
8093 return status;
8094}
8095
fc01cea9
AA		 8096/*
8097 * Renew the cl_session lease.
8098 */
d5f8d3fe
TM		 8099struct nfs4_sequence_data {
8100 struct nfs_client *clp;
8101 struct nfs4_sequence_args args;
8102 struct nfs4_sequence_res res;
8103};
8104
dc96aef9
AB		 8105static void nfs41_sequence_release(void *data)
8106{
d5f8d3fe
TM		 8107 struct nfs4_sequence_data *calldata = data;
8108 struct nfs_client *clp = calldata->clp;
dc96aef9 8109
7135840f
AB		 8110 if (atomic_read(&clp->cl_count) > 1)
8111 nfs4_schedule_state_renewal(clp);
8112 nfs_put_client(clp);
d5f8d3fe 8113 kfree(calldata);
dc96aef9
AB		 8114}
8115
aa5190d0
TM		 8116static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8117{
8118 switch(task->tk_status) {
8119 case -NFS4ERR_DELAY:
aa5190d0
TM		 8120 rpc_delay(task, NFS4_POLL_RETRY_MAX);
8121 return -EAGAIN;
8122 default:
0400a6b0 8123 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 8124 }
8125 return 0;
8126}
8127
dc96aef9 8128static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 8129{
d5f8d3fe
TM		 8130 struct nfs4_sequence_data *calldata = data;
8131 struct nfs_client *clp = calldata->clp;
fc01cea9 8132
14516c3a
TM		 8133 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
8134 return;
fc01cea9 8135
c6d01c6f 8136 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 8137 if (task->tk_status < 0) {
8138 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 8139 if (atomic_read(&clp->cl_count) == 1)
8140 goto out;
fc01cea9 8141
aa5190d0
TM		 8142 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
8143 rpc_restart_call_prepare(task);
fc01cea9
AA		 8144 return;
8145 }
8146 }
fc01cea9 8147 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 8148out:
fc01cea9
AA		 8149 dprintk("<-- %s\n", __func__);
8150}
8151
8152static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
8153{
d5f8d3fe
TM		 8154 struct nfs4_sequence_data *calldata = data;
8155 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 8156 struct nfs4_sequence_args *args;
8157 struct nfs4_sequence_res *res;
8158
fc01cea9
AA		 8159 args = task->tk_msg.rpc_argp;
8160 res = task->tk_msg.rpc_resp;
8161
d9afbd1b 8162 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 8163}
8164
8165static const struct rpc_call_ops nfs41_sequence_ops = {
8166 .rpc_call_done = nfs41_sequence_call_done,
8167 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 8168 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 8169};
8170
8fe72bac
TM		 8171static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
8172 struct rpc_cred *cred,
8173 bool is_privileged)
fc01cea9 8174{
d5f8d3fe 8175 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 8176 struct rpc_message msg = {
8177 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
8178 .rpc_cred = cred,
8179 };
71ac6da9
TM		 8180 struct rpc_task_setup task_setup_data = {
8181 .rpc_client = clp->cl_rpcclient,
8182 .rpc_message = &msg,
8fe72bac 8183 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 8184 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 8185 };
fc01cea9 8186
7135840f 8187 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 8188 return ERR_PTR(-EIO);
dfb4f309 8189 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 8190 if (calldata == NULL) {
7135840f 8191 nfs_put_client(clp);
71ac6da9 8192 return ERR_PTR(-ENOMEM);
fc01cea9 8193 }
a9c92d6b 8194 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 8195 if (is_privileged)
8196 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 8197 msg.rpc_argp = &calldata->args;
8198 msg.rpc_resp = &calldata->res;
8199 calldata->clp = clp;
71ac6da9 8200 task_setup_data.callback_data = calldata;
fc01cea9 8201
71ac6da9
TM		 8202 return rpc_run_task(&task_setup_data);
8203}
8204
2f60ea6b 8205static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 8206{
8207 struct rpc_task *task;
8208 int ret = 0;
8209
2f60ea6b 8210 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 8211 return -EAGAIN;
8fe72bac 8212 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 8213 if (IS_ERR(task))
8214 ret = PTR_ERR(task);
8215 else
bf294b41 8216 rpc_put_task_async(task);
71ac6da9
TM		 8217 dprintk("<-- %s status=%d\n", __func__, ret);
8218 return ret;
8219}
8220
8221static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
8222{
8223 struct rpc_task *task;
8224 int ret;
8225
8fe72bac 8226 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 8227 if (IS_ERR(task)) {
8228 ret = PTR_ERR(task);
8229 goto out;
8230 }
8231 ret = rpc_wait_for_completion_task(task);
be824167 8232 if (!ret)
71ac6da9
TM		 8233 ret = task->tk_status;
8234 rpc_put_task(task);
8235out:
8236 dprintk("<-- %s status=%d\n", __func__, ret);
8237 return ret;
fc01cea9
AA		 8238}
8239
fce5c838
RL		 8240struct nfs4_reclaim_complete_data {
8241 struct nfs_client *clp;
8242 struct nfs41_reclaim_complete_args arg;
8243 struct nfs41_reclaim_complete_res res;
8244};
8245
8246static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
8247{
8248 struct nfs4_reclaim_complete_data *calldata = data;
8249
d9afbd1b
TM		 8250 nfs41_setup_sequence(calldata->clp->cl_session,
8251 &calldata->arg.seq_args,
8252 &calldata->res.seq_res,
8253 task);
fce5c838
RL		 8254}
8255
aa5190d0
TM		 8256static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
8257{
8258 switch(task->tk_status) {
8259 case 0:
8260 case -NFS4ERR_COMPLETE_ALREADY:
8261 case -NFS4ERR_WRONG_CRED: /* What to do here? */
8262 break;
8263 case -NFS4ERR_DELAY:
aa5190d0 8264 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 8265 /* fall through */
8266 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 8267 return -EAGAIN;
8268 default:
0400a6b0 8269 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 8270 }
8271 return 0;
8272}
8273
fce5c838
RL		 8274static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
8275{
8276 struct nfs4_reclaim_complete_data *calldata = data;
8277 struct nfs_client *clp = calldata->clp;
8278 struct nfs4_sequence_res *res = &calldata->res.seq_res;
8279
8280 dprintk("--> %s\n", __func__);
14516c3a
TM		 8281 if (!nfs41_sequence_done(task, res))
8282 return;
fce5c838 8283
c6d01c6f 8284 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 8285 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
8286 rpc_restart_call_prepare(task);
8287 return;
8288 }
fce5c838
RL		 8289 dprintk("<-- %s\n", __func__);
8290}
8291
8292static void nfs4_free_reclaim_complete_data(void *data)
8293{
8294 struct nfs4_reclaim_complete_data *calldata = data;
8295
8296 kfree(calldata);
8297}
8298
8299static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
8300 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
8301 .rpc_call_done = nfs4_reclaim_complete_done,
8302 .rpc_release = nfs4_free_reclaim_complete_data,
8303};
8304
8305/*
8306 * Issue a global reclaim complete.
8307 */
965e9c23
TM		 8308static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
8309 struct rpc_cred *cred)
fce5c838
RL		 8310{
8311 struct nfs4_reclaim_complete_data *calldata;
8312 struct rpc_task *task;
8313 struct rpc_message msg = {
8314 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 8315 .rpc_cred = cred,
fce5c838
RL		 8316 };
8317 struct rpc_task_setup task_setup_data = {
8318 .rpc_client = clp->cl_rpcclient,
8319 .rpc_message = &msg,
8320 .callback_ops = &nfs4_reclaim_complete_call_ops,
8321 .flags = RPC_TASK_ASYNC,
8322 };
8323 int status = -ENOMEM;
8324
8325 dprintk("--> %s\n", __func__);
8535b2be 8326 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 8327 if (calldata == NULL)
8328 goto out;
8329 calldata->clp = clp;
8330 calldata->arg.one_fs = 0;
fce5c838 8331
a9c92d6b 8332 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 8333 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 8334 msg.rpc_argp = &calldata->arg;
8335 msg.rpc_resp = &calldata->res;
8336 task_setup_data.callback_data = calldata;
8337 task = rpc_run_task(&task_setup_data);
acf82b85 8338 if (IS_ERR(task)) {
fce5c838 8339 status = PTR_ERR(task);
acf82b85
DC		 8340 goto out;
8341 }
c34c32ea
AA		 8342 status = nfs4_wait_for_completion_rpc_task(task);
8343 if (status == 0)
8344 status = task->tk_status;
fce5c838 8345 rpc_put_task(task);
acf82b85 8346 return 0;
fce5c838
RL		 8347out:
8348 dprintk("<-- %s status=%d\n", __func__, status);
8349 return status;
8350}
b1f69b75
AA		 8351
8352static void
8353nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
8354{
8355 struct nfs4_layoutget *lgp = calldata;
c31663d4 8356 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 8357 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 8358
8359 dprintk("--> %s\n", __func__);
183d9e7b
JL		 8360 nfs41_setup_sequence(session, &lgp->args.seq_args,
8361 &lgp->res.seq_res, task);
8362 dprintk("<-- %s\n", __func__);
b1f69b75
AA		 8363}
8364
8365static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
8366{
8367 struct nfs4_layoutget *lgp = calldata;
183d9e7b
JL		 8368
8369 dprintk("--> %s\n", __func__);
2e80dbe7 8370 nfs41_sequence_process(task, &lgp->res.seq_res);
183d9e7b
JL		 8371 dprintk("<-- %s\n", __func__);
8372}
8373
8374static int
8375nfs4_layoutget_handle_exception(struct rpc_task *task,
8376 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
8377{
ee314c2a
TM		 8378 struct inode *inode = lgp->args.inode;
8379 struct nfs_server *server = NFS_SERVER(inode);
8380 struct pnfs_layout_hdr *lo;
e85d7ee4
TM		 8381 int nfs4err = task->tk_status;
8382 int err, status = 0;
f7db0b28 8383 LIST_HEAD(head);
b1f69b75 8384
ed7e5423 8385 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 8386
e85d7ee4 8387 switch (nfs4err) {
b1f69b75 8388 case 0:
ee314c2a 8389 goto out;
7c1e6e58
PT		 8390
8391 /*
8392 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
8393 * on the file. set tk_status to -ENODATA to tell upper layer to
8394 * retry go inband.
8395 */
8396 case -NFS4ERR_LAYOUTUNAVAILABLE:
183d9e7b 8397 status = -ENODATA;
7c1e6e58 8398 goto out;
21b874c8
TM		 8399 /*
8400 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
8401 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
8402 */
8403 case -NFS4ERR_BADLAYOUT:
183d9e7b
JL		 8404 status = -EOVERFLOW;
8405 goto out;
ed7e5423
BH		 8406 /*
8407 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
21b874c8
TM		 8408 * (or clients) writing to the same RAID stripe except when
8409 * the minlength argument is 0 (see RFC5661 section 18.43.3).
183d9e7b
JL		 8410 *
8411 * Treat it like we would RECALLCONFLICT -- we retry for a little
8412 * while, and then eventually give up.
ed7e5423 8413 */
b1f69b75 8414 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b
JL		 8415 if (lgp->args.minlength == 0) {
8416 status = -EOVERFLOW;
8417 goto out;
ed7e5423 8418 }
e85d7ee4
TM		 8419 status = -EBUSY;
8420 break;
183d9e7b 8421 case -NFS4ERR_RECALLCONFLICT:
183d9e7b 8422 status = -ERECALLCONFLICT;
e85d7ee4 8423 break;
26f47443
TM		 8424 case -NFS4ERR_DELEG_REVOKED:
8425 case -NFS4ERR_ADMIN_REVOKED:
ee314c2a
TM		 8426 case -NFS4ERR_EXPIRED:
8427 case -NFS4ERR_BAD_STATEID:
183d9e7b 8428 exception->timeout = 0;
ee314c2a 8429 spin_lock(&inode->i_lock);
f7db0b28
TM		 8430 lo = NFS_I(inode)->layout;
8431 /* If the open stateid was bad, then recover it. */
8432 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
8433 nfs4_stateid_match_other(&lgp->args.stateid,
2259f960 8434 &lgp->args.ctx->state->stateid)) {
ee314c2a 8435 spin_unlock(&inode->i_lock);
183d9e7b 8436 exception->state = lgp->args.ctx->state;
26f47443 8437 exception->stateid = &lgp->args.stateid;
2259f960
TM		 8438 break;
8439 }
f7db0b28
TM		 8440
8441 /*
8442 * Mark the bad layout state as invalid, then retry
8443 */
668f455d 8444 pnfs_mark_layout_stateid_invalid(lo, &head);
f7db0b28
TM		 8445 spin_unlock(&inode->i_lock);
8446 pnfs_free_lseg_list(&head);
8447 status = -EAGAIN;
8448 goto out;
b1f69b75 8449 }
183d9e7b 8450
e85d7ee4
TM		 8451 err = nfs4_handle_exception(server, nfs4err, exception);
8452 if (!status) {
8453 if (exception->retry)
8454 status = -EAGAIN;
8455 else
8456 status = err;
8457 }
ee314c2a 8458out:
b1f69b75 8459 dprintk("<-- %s\n", __func__);
183d9e7b 8460 return status;
b1f69b75
AA		 8461}
8462
8554116e
IK		 8463static size_t max_response_pages(struct nfs_server *server)
8464{
8465 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
8466 return nfs_page_array_len(0, max_resp_sz);
8467}
8468
8469static void nfs4_free_pages(struct page **pages, size_t size)
8470{
8471 int i;
8472
8473 if (!pages)
8474 return;
8475
8476 for (i = 0; i < size; i++) {
8477 if (!pages[i])
8478 break;
8479 __free_page(pages[i]);
8480 }
8481 kfree(pages);
8482}
8483
8484static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
8485{
8486 struct page **pages;
8487 int i;
8488
8489 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
8490 if (!pages) {
8491 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
8492 return NULL;
8493 }
8494
8495 for (i = 0; i < size; i++) {
8496 pages[i] = alloc_page(gfp_flags);
8497 if (!pages[i]) {
8498 dprintk("%s: failed to allocate page\n", __func__);
8499 nfs4_free_pages(pages, size);
8500 return NULL;
8501 }
8502 }
8503
8504 return pages;
8505}
8506
b1f69b75
AA		 8507static void nfs4_layoutget_release(void *calldata)
8508{
8509 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 8510 struct inode *inode = lgp->args.inode;
8511 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8512 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8513
8514 dprintk("--> %s\n", __func__);
8554116e 8515 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 8516 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 8517 put_nfs_open_context(lgp->args.ctx);
8518 kfree(calldata);
8519 dprintk("<-- %s\n", __func__);
8520}
8521
8522static const struct rpc_call_ops nfs4_layoutget_call_ops = {
8523 .rpc_call_prepare = nfs4_layoutget_prepare,
8524 .rpc_call_done = nfs4_layoutget_done,
8525 .rpc_release = nfs4_layoutget_release,
8526};
8527
a0b0a6e3 8528struct pnfs_layout_segment *
183d9e7b 8529nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags)
b1f69b75 8530{
a47970ff
WAA		 8531 struct inode *inode = lgp->args.inode;
8532 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8533 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8534 struct rpc_task *task;
8535 struct rpc_message msg = {
8536 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
8537 .rpc_argp = &lgp->args,
8538 .rpc_resp = &lgp->res,
6ab59344 8539 .rpc_cred = lgp->cred,
b1f69b75
AA		 8540 };
8541 struct rpc_task_setup task_setup_data = {
8542 .rpc_client = server->client,
8543 .rpc_message = &msg,
8544 .callback_ops = &nfs4_layoutget_call_ops,
8545 .callback_data = lgp,
8546 .flags = RPC_TASK_ASYNC,
8547 };
a0b0a6e3 8548 struct pnfs_layout_segment *lseg = NULL;
bc23676c
TM		 8549 struct nfs4_exception exception = {
8550 .inode = inode,
8551 .timeout = *timeout,
8552 };
b1f69b75
AA		 8553 int status = 0;
8554
8555 dprintk("--> %s\n", __func__);
8556
4bd5a980
PT		 8557 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
8558 pnfs_get_layout_hdr(NFS_I(inode)->layout);
8559
8554116e
IK		 8560 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
8561 if (!lgp->args.layout.pages) {
8562 nfs4_layoutget_release(lgp);
a0b0a6e3 8563 return ERR_PTR(-ENOMEM);
8554116e
IK		 8564 }
8565 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
8566
35124a09 8567 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 8568 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 8569 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 8570
b1f69b75
AA		 8571 task = rpc_run_task(&task_setup_data);
8572 if (IS_ERR(task))
a0b0a6e3 8573 return ERR_CAST(task);
b1f69b75 8574 status = nfs4_wait_for_completion_rpc_task(task);
183d9e7b
JL		 8575 if (status == 0) {
8576 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
8577 *timeout = exception.timeout;
8578 }
8579
1037e6ea
TM		 8580 trace_nfs4_layoutget(lgp->args.ctx,
8581 &lgp->args.range,
8582 &lgp->res.range,
48c9579a 8583 &lgp->res.stateid,
1037e6ea 8584 status);
183d9e7b 8585
085b7a45
WAA		 8586 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8587 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 8588 lseg = pnfs_layout_process(lgp);
2e80dbe7 8589 nfs4_sequence_free_slot(&lgp->res.seq_res);
b1f69b75
AA		 8590 rpc_put_task(task);
8591 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 8592 if (status)
8593 return ERR_PTR(status);
8594 return lseg;
b1f69b75
AA		 8595}
8596
cbe82603
BH		 8597static void
8598nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8599{
8600 struct nfs4_layoutreturn *lrp = calldata;
8601
8602 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 8603 nfs41_setup_sequence(lrp->clp->cl_session,
8604 &lrp->args.seq_args,
8605 &lrp->res.seq_res,
8606 task);
cbe82603
BH		 8607}
8608
8609static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8610{
8611 struct nfs4_layoutreturn *lrp = calldata;
8612 struct nfs_server *server;
8613
8614 dprintk("--> %s\n", __func__);
8615
2e80dbe7 8616 if (!nfs41_sequence_process(task, &lrp->res.seq_res))
cbe82603
BH		 8617 return;
8618
8619 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 8620 switch (task->tk_status) {
8621 default:
8622 task->tk_status = 0;
8623 case 0:
8624 break;
8625 case -NFS4ERR_DELAY:
8478eaa1 8626 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 8627 break;
2e80dbe7 8628 nfs4_sequence_free_slot(&lrp->res.seq_res);
d00c5d43 8629 rpc_restart_call_prepare(task);
cbe82603
BH		 8630 return;
8631 }
cbe82603
BH		 8632 dprintk("<-- %s\n", __func__);
8633}
8634
8635static void nfs4_layoutreturn_release(void *calldata)
8636{
8637 struct nfs4_layoutreturn *lrp = calldata;
849b286f 8638 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 8639
8640 dprintk("--> %s\n", __func__);
2a974425 8641 pnfs_layoutreturn_free_lsegs(lo, &lrp->args.stateid, &lrp->args.range,
68f74479 8642 lrp->res.lrs_present ? &lrp->res.stateid : NULL);
2e80dbe7 8643 nfs4_sequence_free_slot(&lrp->res.seq_res);
70c3bd2b 8644 pnfs_put_layout_hdr(lrp->args.layout);
5a0ec8ac 8645 nfs_iput_and_deactive(lrp->inode);
4d796d75
TM		 8646 if (lrp->ld_private.ops && lrp->ld_private.ops->free)
8647 lrp->ld_private.ops->free(&lrp->ld_private);
cbe82603
BH		 8648 kfree(calldata);
8649 dprintk("<-- %s\n", __func__);
8650}
8651
8652static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8653 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8654 .rpc_call_done = nfs4_layoutreturn_done,
8655 .rpc_release = nfs4_layoutreturn_release,
8656};
8657
6c16605d 8658int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 8659{
8660 struct rpc_task *task;
8661 struct rpc_message msg = {
8662 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8663 .rpc_argp = &lrp->args,
8664 .rpc_resp = &lrp->res,
9556000d 8665 .rpc_cred = lrp->cred,
cbe82603
BH		 8666 };
8667 struct rpc_task_setup task_setup_data = {
1771c577 8668 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8669 .rpc_message = &msg,
8670 .callback_ops = &nfs4_layoutreturn_call_ops,
8671 .callback_data = lrp,
8672 };
6c16605d 8673 int status = 0;
cbe82603 8674
99ade3c7
AE		 8675 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
8676 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
8677 &task_setup_data.rpc_client, &msg);
8678
cbe82603 8679 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8680 if (!sync) {
8681 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8682 if (!lrp->inode) {
8683 nfs4_layoutreturn_release(lrp);
8684 return -EAGAIN;
8685 }
8686 task_setup_data.flags |= RPC_TASK_ASYNC;
8687 }
a9c92d6b 8688 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8689 task = rpc_run_task(&task_setup_data);
8690 if (IS_ERR(task))
8691 return PTR_ERR(task);
5a0ec8ac
TM		 8692 if (sync)
8693 status = task->tk_status;
48c9579a 8694 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
cbe82603
BH		 8695 dprintk("<-- %s status=%d\n", __func__, status);
8696 rpc_put_task(task);
8697 return status;
8698}
8699
b1f69b75 8700static int
cd5875fe
TM		 8701_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8702 struct pnfs_device *pdev,
8703 struct rpc_cred *cred)
b1f69b75
AA		 8704{
8705 struct nfs4_getdeviceinfo_args args = {
8706 .pdev = pdev,
4e590803
TM		 8707 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8708 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8709 };
8710 struct nfs4_getdeviceinfo_res res = {
8711 .pdev = pdev,
8712 };
8713 struct rpc_message msg = {
8714 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8715 .rpc_argp = &args,
8716 .rpc_resp = &res,
cd5875fe 8717 .rpc_cred = cred,
b1f69b75
AA		 8718 };
8719 int status;
8720
8721 dprintk("--> %s\n", __func__);
7c513058 8722 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8723 if (res.notification & ~args.notify_types)
8724 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8725 if (res.notification != args.notify_types)
8726 pdev->nocache = 1;
4e590803 8727
b1f69b75
AA		 8728 dprintk("<-- %s status=%d\n", __func__, status);
8729
8730 return status;
8731}
8732
cd5875fe
TM		 8733int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8734 struct pnfs_device *pdev,
8735 struct rpc_cred *cred)
b1f69b75
AA		 8736{
8737 struct nfs4_exception exception = { };
8738 int err;
8739
8740 do {
8741 err = nfs4_handle_exception(server,
cd5875fe 8742 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8743 &exception);
8744 } while (exception.retry);
8745 return err;
8746}
8747EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8748
863a3c6c
AA		 8749static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8750{
8751 struct nfs4_layoutcommit_data *data = calldata;
8752 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 8753 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 8754
d9afbd1b
TM		 8755 nfs41_setup_sequence(session,
8756 &data->args.seq_args,
8757 &data->res.seq_res,
8758 task);
863a3c6c
AA		 8759}
8760
8761static void
8762nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8763{
8764 struct nfs4_layoutcommit_data *data = calldata;
8765 struct nfs_server *server = NFS_SERVER(data->args.inode);
8766
6ba7db34 8767 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8768 return;
8769
8770 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8771 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8772 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8773 case -NFS4ERR_BADLAYOUT: /* no layout */
8774 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8775 task->tk_status = 0;
e59d27e0 8776 case 0:
e59d27e0
TM		 8777 break;
8778 default:
8478eaa1 8779 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8780 rpc_restart_call_prepare(task);
8781 return;
8782 }
8783 }
863a3c6c
AA		 8784}
8785
8786static void nfs4_layoutcommit_release(void *calldata)
8787{
8788 struct nfs4_layoutcommit_data *data = calldata;
8789
db29c089 8790 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8791 nfs_post_op_update_inode_force_wcc(data->args.inode,
8792 data->res.fattr);
863a3c6c 8793 put_rpccred(data->cred);
472e2594 8794 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8795 kfree(data);
8796}
8797
8798static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8799 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8800 .rpc_call_done = nfs4_layoutcommit_done,
8801 .rpc_release = nfs4_layoutcommit_release,
8802};
8803
8804int
ef311537 8805nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8806{
8807 struct rpc_message msg = {
8808 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8809 .rpc_argp = &data->args,
8810 .rpc_resp = &data->res,
8811 .rpc_cred = data->cred,
8812 };
8813 struct rpc_task_setup task_setup_data = {
8814 .task = &data->task,
8815 .rpc_client = NFS_CLIENT(data->args.inode),
8816 .rpc_message = &msg,
8817 .callback_ops = &nfs4_layoutcommit_ops,
8818 .callback_data = data,
863a3c6c
AA		 8819 };
8820 struct rpc_task *task;
8821 int status = 0;
8822
b4839ebe
KM		 8823 dprintk("NFS: initiating layoutcommit call. sync %d "
8824 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8825 data->args.lastbytewritten,
8826 data->args.inode->i_ino);
8827
472e2594
TM		 8828 if (!sync) {
8829 data->inode = nfs_igrab_and_active(data->args.inode);
8830 if (data->inode == NULL) {
8831 nfs4_layoutcommit_release(data);
8832 return -EAGAIN;
8833 }
8834 task_setup_data.flags = RPC_TASK_ASYNC;
8835 }
a9c92d6b 8836 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8837 task = rpc_run_task(&task_setup_data);
8838 if (IS_ERR(task))
8839 return PTR_ERR(task);
472e2594
TM		 8840 if (sync)
8841 status = task->tk_status;
48c9579a 8842 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
863a3c6c
AA		 8843 dprintk("%s: status %d\n", __func__, status);
8844 rpc_put_task(task);
8845 return status;
8846}
fca78d6d 8847
97431204
AA		 8848/**
8849 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8850 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8851 */
fca78d6d
BS		 8852static int
8853_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8854 struct nfs_fsinfo *info,
8855 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8856{
8857 struct nfs41_secinfo_no_name_args args = {
8858 .style = SECINFO_STYLE_CURRENT_FH,
8859 };
8860 struct nfs4_secinfo_res res = {
8861 .flavors = flavors,
8862 };
8863 struct rpc_message msg = {
8864 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8865 .rpc_argp = &args,
8866 .rpc_resp = &res,
8867 };
b1b3e136 8868 struct rpc_clnt *clnt = server->client;
7cb852df 8869 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8870 int status;
8871
8872 if (use_integrity) {
8873 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8874 cred = nfs4_get_clid_cred(server->nfs_client);
8875 msg.rpc_cred = cred;
b1b3e136
WAA		 8876 }
8877
8878 dprintk("--> %s\n", __func__);
8879 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8880 &res.seq_res, 0);
8881 dprintk("<-- %s status=%d\n", __func__, status);
8882
7cb852df
WAA		 8883 if (cred)
8884 put_rpccred(cred);
b1b3e136
WAA		 8885
8886 return status;
fca78d6d
BS		 8887}
8888
8889static int
8890nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8891 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8892{
8893 struct nfs4_exception exception = { };
8894 int err;
8895 do {
b1b3e136
WAA		 8896 /* first try using integrity protection */
8897 err = -NFS4ERR_WRONGSEC;
8898
8899 /* try to use integrity protection with machine cred */
8900 if (_nfs4_is_integrity_protected(server->nfs_client))
8901 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8902 flavors, true);
8903
8904 /*
8905 * if unable to use integrity protection, or SECINFO with
8906 * integrity protection returns NFS4ERR_WRONGSEC (which is
8907 * disallowed by spec, but exists in deployed servers) use
8908 * the current filesystem's rpc_client and the user cred.
8909 */
8910 if (err == -NFS4ERR_WRONGSEC)
8911 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8912 flavors, false);
8913
fca78d6d
BS		 8914 switch (err) {
8915 case 0:
8916 case -NFS4ERR_WRONGSEC:
78b19bae 8917 case -ENOTSUPP:
05e9cfb4 8918 goto out;
fca78d6d
BS		 8919 default:
8920 err = nfs4_handle_exception(server, err, &exception);
8921 }
8922 } while (exception.retry);
05e9cfb4 8923out:
fca78d6d
BS		 8924 return err;
8925}
8926
8927static int
8928nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8929 struct nfs_fsinfo *info)
8930{
8931 int err;
8932 struct page *page;
367156d9 8933 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8934 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8935 struct nfs4_secinfo4 *secinfo;
8936 int i;
fca78d6d
BS		 8937
8938 page = alloc_page(GFP_KERNEL);
8939 if (!page) {
8940 err = -ENOMEM;
8941 goto out;
8942 }
8943
8944 flavors = page_address(page);
8945 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8946
8947 /*
8948 * Fall back on "guess and check" method if
8949 * the server doesn't support SECINFO_NO_NAME
8950 */
78b19bae 8951 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8952 err = nfs4_find_root_sec(server, fhandle, info);
8953 goto out_freepage;
8954 }
8955 if (err)
8956 goto out_freepage;
8957
58a8cf12
WAA		 8958 for (i = 0; i < flavors->num_flavors; i++) {
8959 secinfo = &flavors->flavors[i];
8960
8961 switch (secinfo->flavor) {
8962 case RPC_AUTH_NULL:
8963 case RPC_AUTH_UNIX:
8964 case RPC_AUTH_GSS:
8965 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8966 &secinfo->flavor_info);
8967 break;
8968 default:
8969 flavor = RPC_AUTH_MAXFLAVOR;
8970 break;
8971 }
8972
4d4b69dd
WAA		 8973 if (!nfs_auth_info_match(&server->auth_info, flavor))
8974 flavor = RPC_AUTH_MAXFLAVOR;
8975
58a8cf12
WAA		 8976 if (flavor != RPC_AUTH_MAXFLAVOR) {
8977 err = nfs4_lookup_root_sec(server, fhandle,
8978 info, flavor);
8979 if (!err)
8980 break;
8981 }
8982 }
8983
8984 if (flavor == RPC_AUTH_MAXFLAVOR)
8985 err = -EPERM;
fca78d6d
BS		 8986
8987out_freepage:
8988 put_page(page);
8989 if (err == -EACCES)
8990 return -EPERM;
8991out:
8992 return err;
8993}
1cab0652 8994
ab7cb0df
TM		 8995static int _nfs41_test_stateid(struct nfs_server *server,
8996 nfs4_stateid *stateid,
8997 struct rpc_cred *cred)
7d974794
BS		 8998{
8999 int status;
9000 struct nfs41_test_stateid_args args = {
1cab0652 9001 .stateid = stateid,
7d974794
BS		 9002 };
9003 struct nfs41_test_stateid_res res;
9004 struct rpc_message msg = {
9005 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
9006 .rpc_argp = &args,
9007 .rpc_resp = &res,
ab7cb0df 9008 .rpc_cred = cred,
7d974794 9009 };
3787d506
WAA		 9010 struct rpc_clnt *rpc_client = server->client;
9011
9012 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9013 &rpc_client, &msg);
1cab0652 9014
38527b15 9015 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 9016 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 9017 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 9018 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 9019 &args.seq_args, &res.seq_res);
38527b15
CL		 9020 if (status != NFS_OK) {
9021 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 9022 return status;
38527b15
CL		 9023 }
9024 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 9025 return -res.status;
7d974794
BS		 9026}
9027
43912bbb
TM		 9028static void nfs4_handle_delay_or_session_error(struct nfs_server *server,
9029 int err, struct nfs4_exception *exception)
9030{
9031 exception->retry = 0;
9032 switch(err) {
9033 case -NFS4ERR_DELAY:
76e8a1bd 9034 case -NFS4ERR_RETRY_UNCACHED_REP:
43912bbb
TM		 9035 nfs4_handle_exception(server, err, exception);
9036 break;
9037 case -NFS4ERR_BADSESSION:
9038 case -NFS4ERR_BADSLOT:
9039 case -NFS4ERR_BAD_HIGH_SLOT:
9040 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
9041 case -NFS4ERR_DEADSESSION:
9042 nfs4_do_handle_exception(server, err, exception);
9043 }
9044}
9045
38527b15
CL		 9046/**
9047 * nfs41_test_stateid - perform a TEST_STATEID operation
9048 *
9049 * @server: server / transport on which to perform the operation
9050 * @stateid: state ID to test
ab7cb0df 9051 * @cred: credential
38527b15
CL		 9052 *
9053 * Returns NFS_OK if the server recognizes that "stateid" is valid.
9054 * Otherwise a negative NFS4ERR value is returned if the operation
9055 * failed or the state ID is not currently valid.
9056 */
ab7cb0df
TM		 9057static int nfs41_test_stateid(struct nfs_server *server,
9058 nfs4_stateid *stateid,
9059 struct rpc_cred *cred)
7d974794
BS		 9060{
9061 struct nfs4_exception exception = { };
9062 int err;
9063 do {
ab7cb0df 9064 err = _nfs41_test_stateid(server, stateid, cred);
43912bbb 9065 nfs4_handle_delay_or_session_error(server, err, &exception);
7d974794
BS		 9066 } while (exception.retry);
9067 return err;
9068}
9aeda35f 9069
7c1d5fae
TM		 9070struct nfs_free_stateid_data {
9071 struct nfs_server *server;
9072 struct nfs41_free_stateid_args args;
9aeda35f 9073 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 9074};
9075
9076static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
9077{
9078 struct nfs_free_stateid_data *data = calldata;
9079 nfs41_setup_sequence(nfs4_get_session(data->server),
9080 &data->args.seq_args,
9081 &data->res.seq_res,
9082 task);
9083}
9084
9085static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
9086{
9087 struct nfs_free_stateid_data *data = calldata;
9088
9089 nfs41_sequence_done(task, &data->res.seq_res);
9090
9091 switch (task->tk_status) {
9092 case -NFS4ERR_DELAY:
8478eaa1 9093 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 9094 rpc_restart_call_prepare(task);
9095 }
9096}
9097
9098static void nfs41_free_stateid_release(void *calldata)
9099{
9100 kfree(calldata);
9101}
9102
17f26b12 9103static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 9104 .rpc_call_prepare = nfs41_free_stateid_prepare,
9105 .rpc_call_done = nfs41_free_stateid_done,
9106 .rpc_release = nfs41_free_stateid_release,
9107};
9108
9109static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
f0b0bf88 9110 const nfs4_stateid *stateid,
ab7cb0df 9111 struct rpc_cred *cred,
7c1d5fae
TM		 9112 bool privileged)
9113{
9aeda35f
BS		 9114 struct rpc_message msg = {
9115 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 9116 .rpc_cred = cred,
9aeda35f 9117 };
7c1d5fae
TM		 9118 struct rpc_task_setup task_setup = {
9119 .rpc_client = server->client,
9120 .rpc_message = &msg,
9121 .callback_ops = &nfs41_free_stateid_ops,
9122 .flags = RPC_TASK_ASYNC,
9123 };
9124 struct nfs_free_stateid_data *data;
9aeda35f 9125
3787d506
WAA		 9126 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
9127 &task_setup.rpc_client, &msg);
9128
38527b15 9129 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 9130 data = kmalloc(sizeof(*data), GFP_NOFS);
9131 if (!data)
9132 return ERR_PTR(-ENOMEM);
9133 data->server = server;
9134 nfs4_stateid_copy(&data->args.stateid, stateid);
9135
9136 task_setup.callback_data = data;
9137
9138 msg.rpc_argp = &data->args;
9139 msg.rpc_resp = &data->res;
76e8a1bd 9140 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
7c1d5fae
TM		 9141 if (privileged)
9142 nfs4_set_sequence_privileged(&data->args.seq_args);
9143
9144 return rpc_run_task(&task_setup);
9aeda35f
BS		 9145}
9146
38527b15
CL		 9147/**
9148 * nfs41_free_stateid - perform a FREE_STATEID operation
9149 *
9150 * @server: server / transport on which to perform the operation
9151 * @stateid: state ID to release
ab7cb0df 9152 * @cred: credential
f0b0bf88 9153 * @is_recovery: set to true if this call needs to be privileged
38527b15 9154 *
f0b0bf88 9155 * Note: this function is always asynchronous.
38527b15 9156 */
ab7cb0df 9157static int nfs41_free_stateid(struct nfs_server *server,
f0b0bf88
TM		 9158 const nfs4_stateid *stateid,
9159 struct rpc_cred *cred,
9160 bool is_recovery)
9aeda35f 9161{
7c1d5fae 9162 struct rpc_task *task;
7c1d5fae 9163
f0b0bf88 9164 task = _nfs41_free_stateid(server, stateid, cred, is_recovery);
7c1d5fae
TM		 9165 if (IS_ERR(task))
9166 return PTR_ERR(task);
7c1d5fae 9167 rpc_put_task(task);
f0b0bf88 9168 return 0;
9aeda35f 9169}
36281caa 9170
f1cdae87
JL		 9171static void
9172nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf 9173{
ab7cb0df 9174 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 9175
f0b0bf88 9176 nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf 9177 nfs4_free_lock_state(server, lsp);
c8b2d0bf
TM		 9178}
9179
36281caa
TM		 9180static bool nfs41_match_stateid(const nfs4_stateid *s1,
9181 const nfs4_stateid *s2)
9182{
93b717fd
TM		 9183 if (s1->type != s2->type)
9184 return false;
9185
2d2f24ad 9186 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 9187 return false;
9188
2d2f24ad 9189 if (s1->seqid == s2->seqid)
36281caa 9190 return true;
2d2f24ad 9191 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 9192 return true;
9193
9194 return false;
9195}
9196
557134a3
AA		 9197#endif /* CONFIG_NFS_V4_1 */
9198
36281caa
TM		 9199static bool nfs4_match_stateid(const nfs4_stateid *s1,
9200 const nfs4_stateid *s2)
9201{
f597c537 9202 return nfs4_stateid_match(s1, s2);
36281caa
TM		 9203}
9204
9205
17280175 9206static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 9207 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 9208 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 9209 .recover_open = nfs4_open_reclaim,
9210 .recover_lock = nfs4_lock_reclaim,
591d71cb 9211 .establish_clid = nfs4_init_clientid,
05f4c350 9212 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 9213};
9214
591d71cb 9215#if defined(CONFIG_NFS_V4_1)
17280175 9216static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 9217 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
9218 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
9219 .recover_open = nfs4_open_reclaim,
9220 .recover_lock = nfs4_lock_reclaim,
4d643d1d 9221 .establish_clid = nfs41_init_clientid,
fce5c838 9222 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 9223 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 9224};
9225#endif /* CONFIG_NFS_V4_1 */
9226
17280175 9227static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 9228 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
9229 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 9230 .recover_open = nfs40_open_expired,
591d71cb
AA		 9231 .recover_lock = nfs4_lock_expired,
9232 .establish_clid = nfs4_init_clientid,
9233};
9234
9235#if defined(CONFIG_NFS_V4_1)
17280175 9236static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 9237 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 9238 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 9239 .recover_open = nfs41_open_expired,
9240 .recover_lock = nfs41_lock_expired,
4d643d1d 9241 .establish_clid = nfs41_init_clientid,
1da177e4 9242};
591d71cb 9243#endif /* CONFIG_NFS_V4_1 */
1da177e4 9244
17280175 9245static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 9246 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 9247 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 9248 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 9249};
9250
9251#if defined(CONFIG_NFS_V4_1)
17280175 9252static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 9253 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 9254 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 9255 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 9256};
9257#endif
9258
ec011fe8 9259static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 9260 .get_locations = _nfs40_proc_get_locations,
44c99933 9261 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 9262};
9263
9264#if defined(CONFIG_NFS_V4_1)
9265static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 9266 .get_locations = _nfs41_proc_get_locations,
44c99933 9267 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 9268};
9269#endif /* CONFIG_NFS_V4_1 */
9270
97dc1359
TM		 9271static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
9272 .minor_version = 0,
39c6daae
TM		 9273 .init_caps = NFS_CAP_READDIRPLUS
9274 | NFS_CAP_ATOMIC_OPEN
39c6daae 9275 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 9276 .init_client = nfs40_init_client,
9277 .shutdown_client = nfs40_shutdown_client,
36281caa 9278 .match_stateid = nfs4_match_stateid,
fca78d6d 9279 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 9280 .free_lock_state = nfs4_release_lockowner,
45870d69 9281 .test_and_free_expired = nfs40_test_and_free_expired_stateid,
63f5f796 9282 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 9283 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 9284 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
9285 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
9286 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 9287 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 9288};
9289
9290#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 9291static struct nfs_seqid *
9292nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
9293{
9294 return NULL;
9295}
9296
97dc1359
TM		 9297static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
9298 .minor_version = 1,
39c6daae
TM		 9299 .init_caps = NFS_CAP_READDIRPLUS
9300 | NFS_CAP_ATOMIC_OPEN
3b66486c 9301 | NFS_CAP_POSIX_LOCK
49f9a0fa 9302 | NFS_CAP_STATEID_NFSV41
e983120e 9303 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 9304 .init_client = nfs41_init_client,
9305 .shutdown_client = nfs41_shutdown_client,
36281caa 9306 .match_stateid = nfs41_match_stateid,
fca78d6d 9307 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 9308 .free_lock_state = nfs41_free_lock_state,
45870d69 9309 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 9310 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 9311 .session_trunk = nfs4_test_session_trunk,
9915ea7e 9312 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 9313 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9314 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9315 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 9316 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 9317};
9318#endif
9319
42c2c424
SD		 9320#if defined(CONFIG_NFS_V4_2)
9321static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
9322 .minor_version = 2,
7017310a
BS		 9323 .init_caps = NFS_CAP_READDIRPLUS
9324 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 9325 | NFS_CAP_POSIX_LOCK
9326 | NFS_CAP_STATEID_NFSV41
e983120e 9327 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 9328 | NFS_CAP_ALLOCATE
2e72448b 9329 | NFS_CAP_COPY
624bd5b7 9330 | NFS_CAP_DEALLOCATE
6c5a0d89 9331 | NFS_CAP_SEEK
e5341f3a
PT		 9332 | NFS_CAP_LAYOUTSTATS
9333 | NFS_CAP_CLONE,
abf79bb3
CL		 9334 .init_client = nfs41_init_client,
9335 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 9336 .match_stateid = nfs41_match_stateid,
9337 .find_root_sec = nfs41_find_root_sec,
7017310a 9338 .free_lock_state = nfs41_free_lock_state,
9915ea7e 9339 .call_sync_ops = &nfs41_call_sync_ops,
45870d69 9340 .test_and_free_expired = nfs41_test_and_free_expired_stateid,
63f5f796 9341 .alloc_seqid = nfs_alloc_no_seqid,
04fa2c6b 9342 .session_trunk = nfs4_test_session_trunk,
42c2c424
SD		 9343 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
9344 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
9345 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 9346 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 9347};
9348#endif
9349
97dc1359
TM		 9350const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
9351 [0] = &nfs_v4_0_minor_ops,
9352#if defined(CONFIG_NFS_V4_1)
9353 [1] = &nfs_v4_1_minor_ops,
9354#endif
42c2c424
SD		 9355#if defined(CONFIG_NFS_V4_2)
9356 [2] = &nfs_v4_2_minor_ops,
9357#endif
97dc1359
TM		 9358};
9359
13997823 9360static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
c4803c49
AG		 9361{
9362 ssize_t error, error2;
9363
9364 error = generic_listxattr(dentry, list, size);
9365 if (error < 0)
9366 return error;
9367 if (list) {
9368 list += error;
9369 size -= error;
9370 }
9371
9372 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
9373 if (error2 < 0)
9374 return error2;
9375 return error + error2;
9376}
9377
17f26b12 9378static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 9379 .create = nfs_create,
9380 .lookup = nfs_lookup,
9381 .atomic_open = nfs_atomic_open,
9382 .link = nfs_link,
9383 .unlink = nfs_unlink,
9384 .symlink = nfs_symlink,
9385 .mkdir = nfs_mkdir,
9386 .rmdir = nfs_rmdir,
9387 .mknod = nfs_mknod,
9388 .rename = nfs_rename,
9389 .permission = nfs_permission,
9390 .getattr = nfs_getattr,
9391 .setattr = nfs_setattr,
c4803c49 9392 .listxattr = nfs4_listxattr,
73a79706
BS		 9393};
9394
92e1d5be 9395static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 9396 .permission = nfs_permission,
9397 .getattr = nfs_getattr,
9398 .setattr = nfs_setattr,
c4803c49 9399 .listxattr = nfs4_listxattr,
6b3b5496
BF		 9400};
9401
509de811 9402const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 9403 .version = 4, /* protocol version */
9404 .dentry_ops = &nfs4_dentry_operations,
9405 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 9406 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 9407 .file_ops = &nfs4_file_operations,
1da177e4 9408 .getroot = nfs4_proc_get_root,
281cad46 9409 .submount = nfs4_submount,
ff9099f2 9410 .try_mount = nfs4_try_mount,
1da177e4
LT		 9411 .getattr = nfs4_proc_getattr,
9412 .setattr = nfs4_proc_setattr,
9413 .lookup = nfs4_proc_lookup,
9414 .access = nfs4_proc_access,
9415 .readlink = nfs4_proc_readlink,
1da177e4
LT		 9416 .create = nfs4_proc_create,
9417 .remove = nfs4_proc_remove,
9418 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 9419 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 9420 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 9421 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 9422 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 9423 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 9424 .link = nfs4_proc_link,
9425 .symlink = nfs4_proc_symlink,
9426 .mkdir = nfs4_proc_mkdir,
9427 .rmdir = nfs4_proc_remove,
9428 .readdir = nfs4_proc_readdir,
9429 .mknod = nfs4_proc_mknod,
9430 .statfs = nfs4_proc_statfs,
9431 .fsinfo = nfs4_proc_fsinfo,
9432 .pathconf = nfs4_proc_pathconf,
e9326dca 9433 .set_capabilities = nfs4_server_capabilities,
1da177e4 9434 .decode_dirent = nfs4_decode_dirent,
a4cdda59 9435 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 9436 .read_setup = nfs4_proc_read_setup,
ec06c096 9437 .read_done = nfs4_read_done,
1da177e4 9438 .write_setup = nfs4_proc_write_setup,
788e7a89 9439 .write_done = nfs4_write_done,
1da177e4 9440 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 9441 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 9442 .commit_done = nfs4_commit_done,
1da177e4 9443 .lock = nfs4_proc_lock,
e50a1c2e 9444 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 9445 .close_context = nfs4_close_context,
2b484297 9446 .open_context = nfs4_atomic_open,
011e2a7f 9447 .have_delegation = nfs4_have_delegation,
57ec14c5 9448 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 9449 .alloc_client = nfs4_alloc_client,
45a52a02 9450 .init_client = nfs4_init_client,
cdb7eced 9451 .free_client = nfs4_free_client,
1179acc6
BS		 9452 .create_server = nfs4_create_server,
9453 .clone_server = nfs_clone_server,
1da177e4
LT		 9454};
9455
64c2ce8b 9456static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
98e9cb57 9457 .name = XATTR_NAME_NFSV4_ACL,
64c2ce8b
AK		 9458 .list = nfs4_xattr_list_nfs4_acl,
9459 .get = nfs4_xattr_get_nfs4_acl,
9460 .set = nfs4_xattr_set_nfs4_acl,
9461};
9462
9463const struct xattr_handler *nfs4_xattr_handlers[] = {
9464 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 9465#ifdef CONFIG_NFS_V4_SECURITY_LABEL
9466 &nfs4_xattr_nfs4_label_handler,
9467#endif
64c2ce8b
AK		 9468 NULL
9469};
9470
1da177e4
LT		 9471/*
9472 * Local variables:
9473 * c-basic-offset: 8
9474 * End:
9475 */
Linux 6.x block layer and io_uring tree(s)