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NFSv4.2: Fix warning "variable ‘stateids’ set but not used"
[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,
1775fd3e
DQ		 97 struct nfs4_state *state, struct nfs4_label *ilabel,
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 *);
102static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
103 struct rpc_cred *);
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
229 | FATTR4_WORD0_CHANGE
230 | FATTR4_WORD0_FILEID,
231};
232
a09df2ca 233const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 234 FATTR4_WORD0_FILES_AVAIL
235 | FATTR4_WORD0_FILES_FREE
236 | FATTR4_WORD0_FILES_TOTAL,
237 FATTR4_WORD1_SPACE_AVAIL
238 | FATTR4_WORD1_SPACE_FREE
239 | FATTR4_WORD1_SPACE_TOTAL
240};
241
a09df2ca 242const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 243 FATTR4_WORD0_MAXLINK
244 | FATTR4_WORD0_MAXNAME,
245 0
246};
247
dae100c2 248const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 249 | FATTR4_WORD0_MAXREAD
250 | FATTR4_WORD0_MAXWRITE
251 | FATTR4_WORD0_LEASE_TIME,
55b6e774 252 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 253 | FATTR4_WORD1_FS_LAYOUT_TYPES,
254 FATTR4_WORD2_LAYOUT_BLKSIZE
2a92ee92 255 | FATTR4_WORD2_CLONE_BLKSIZE
1da177e4
LT		 256};
257
a09df2ca 258const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 259 FATTR4_WORD0_TYPE
260 | FATTR4_WORD0_CHANGE
261 | FATTR4_WORD0_SIZE
262 | FATTR4_WORD0_FSID
263 | FATTR4_WORD0_FILEID
264 | FATTR4_WORD0_FS_LOCATIONS,
265 FATTR4_WORD1_MODE
266 | FATTR4_WORD1_NUMLINKS
267 | FATTR4_WORD1_OWNER
268 | FATTR4_WORD1_OWNER_GROUP
269 | FATTR4_WORD1_RAWDEV
270 | FATTR4_WORD1_SPACE_USED
271 | FATTR4_WORD1_TIME_ACCESS
272 | FATTR4_WORD1_TIME_METADATA
273 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 274 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 275};
276
bc4785cd 277static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 278 struct nfs4_readdir_arg *readdir)
279{
0dbb4c67 280 __be32 *start, *p;
1da177e4 281
1da177e4 282 if (cookie > 2) {
b7ef1956 283 readdir->cookie = cookie;
1da177e4
LT		 284 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
285 return;
286 }
287
288 readdir->cookie = 0;
289 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
290 if (cookie == 2)
291 return;
292
293 /*
294 * NFSv4 servers do not return entries for '.' and '..'
295 * Therefore, we fake these entries here. We let '.'
296 * have cookie 0 and '..' have cookie 1. Note that
297 * when talking to the server, we always send cookie 0
298 * instead of 1 or 2.
299 */
2b86ce2d 300 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 301
302 if (cookie == 0) {
303 *p++ = xdr_one; /* next */
304 *p++ = xdr_zero; /* cookie, first word */
305 *p++ = xdr_one; /* cookie, second word */
306 *p++ = xdr_one; /* entry len */
307 memcpy(p, ".\0\0\0", 4); /* entry */
308 p++;
309 *p++ = xdr_one; /* bitmap length */
310 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
311 *p++ = htonl(8); /* attribute buffer length */
2b0143b5 312 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
1da177e4
LT		 313 }
314
315 *p++ = xdr_one; /* next */
316 *p++ = xdr_zero; /* cookie, first word */
317 *p++ = xdr_two; /* cookie, second word */
318 *p++ = xdr_two; /* entry len */
319 memcpy(p, "..\0\0", 4); /* entry */
320 p++;
321 *p++ = xdr_one; /* bitmap length */
322 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
323 *p++ = htonl(8); /* attribute buffer length */
2b0143b5 324 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
1da177e4
LT		 325
326 readdir->pgbase = (char *)p - (char *)start;
327 readdir->count -= readdir->pgbase;
2b86ce2d 328 kunmap_atomic(start);
1da177e4
LT		 329}
330
8478eaa1
N		 331static long nfs4_update_delay(long *timeout)
332{
333 long ret;
334 if (!timeout)
335 return NFS4_POLL_RETRY_MAX;
336 if (*timeout <= 0)
337 *timeout = NFS4_POLL_RETRY_MIN;
338 if (*timeout > NFS4_POLL_RETRY_MAX)
339 *timeout = NFS4_POLL_RETRY_MAX;
340 ret = *timeout;
341 *timeout <<= 1;
342 return ret;
343}
344
65de872e
TM		 345static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
346{
347 int res = 0;
348
349 might_sleep();
350
8478eaa1
N		 351 freezable_schedule_timeout_killable_unsafe(
352 nfs4_update_delay(timeout));
65de872e
TM		 353 if (fatal_signal_pending(current))
354 res = -ERESTARTSYS;
65de872e
TM		 355 return res;
356}
357
358/* This is the error handling routine for processes that are allowed
359 * to sleep.
360 */
b3c2aa07
TM		 361static int nfs4_do_handle_exception(struct nfs_server *server,
362 int errorcode, struct nfs4_exception *exception)
65de872e
TM		 363{
364 struct nfs_client *clp = server->nfs_client;
9e33bed5 365 struct nfs4_state *state = exception->state;
8487c479 366 const nfs4_stateid *stateid = exception->stateid;
3114ea7a 367 struct inode *inode = exception->inode;
65de872e
TM		 368 int ret = errorcode;
369
b3c2aa07
TM		 370 exception->delay = 0;
371 exception->recovering = 0;
65de872e
TM		 372 exception->retry = 0;
373 switch(errorcode) {
374 case 0:
375 return 0;
3114ea7a 376 case -NFS4ERR_OPENMODE:
5ba12443
TM		 377 case -NFS4ERR_DELEG_REVOKED:
378 case -NFS4ERR_ADMIN_REVOKED:
379 case -NFS4ERR_BAD_STATEID:
8487c479
TM		 380 if (inode) {
381 int err;
382
383 err = nfs_async_inode_return_delegation(inode,
384 stateid);
385 if (err == 0)
386 goto wait_on_recovery;
387 if (stateid != NULL && stateid->type == NFS4_DELEGATION_STATEID_TYPE) {
388 exception->retry = 1;
389 break;
390 }
391 }
3114ea7a
TM		 392 if (state == NULL)
393 break;
5d422301
TM		 394 ret = nfs4_schedule_stateid_recovery(server, state);
395 if (ret < 0)
396 break;
3114ea7a 397 goto wait_on_recovery;
0ced63d1 398 case -NFS4ERR_EXPIRED:
5d422301
TM		 399 if (state != NULL) {
400 ret = nfs4_schedule_stateid_recovery(server, state);
401 if (ret < 0)
402 break;
403 }
65de872e 404 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 405 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 406 nfs4_schedule_lease_recovery(clp);
407 goto wait_on_recovery;
519ae255
CL		 408 case -NFS4ERR_MOVED:
409 ret = nfs4_schedule_migration_recovery(server);
410 if (ret < 0)
411 break;
412 goto wait_on_recovery;
8ef2f8d4
CL		 413 case -NFS4ERR_LEASE_MOVED:
414 nfs4_schedule_lease_moved_recovery(clp);
415 goto wait_on_recovery;
03391693 416#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 417 case -NFS4ERR_BADSESSION:
418 case -NFS4ERR_BADSLOT:
419 case -NFS4ERR_BAD_HIGH_SLOT:
420 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
421 case -NFS4ERR_DEADSESSION:
422 case -NFS4ERR_SEQ_FALSE_RETRY:
423 case -NFS4ERR_SEQ_MISORDERED:
424 dprintk("%s ERROR: %d Reset session\n", __func__,
425 errorcode);
9f594791 426 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 427 goto wait_on_recovery;
03391693 428#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 429 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 430 if (exception->timeout > HZ) {
431 /* We have retried a decent amount, time to
432 * fail
433 */
434 ret = -EBUSY;
435 break;
436 }
65de872e 437 case -NFS4ERR_DELAY:
2598ed34
TM		 438 nfs_inc_server_stats(server, NFSIOS_DELAY);
439 case -NFS4ERR_GRACE:
e85d7ee4 440 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b 441 case -NFS4ERR_RECALLCONFLICT:
b3c2aa07
TM		 442 exception->delay = 1;
443 return 0;
444
a8a4ae3a 445 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 446 case -NFS4ERR_OLD_STATEID:
447 exception->retry = 1;
b064eca2
TM		 448 break;
449 case -NFS4ERR_BADOWNER:
450 /* The following works around a Linux server bug! */
451 case -NFS4ERR_BADNAME:
452 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
453 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
454 exception->retry = 1;
455 printk(KERN_WARNING "NFS: v4 server %s "
456 "does not accept raw "
457 "uid/gids. "
458 "Reenabling the idmapper.\n",
459 server->nfs_client->cl_hostname);
460 }
65de872e
TM		 461 }
462 /* We failed to handle the error */
463 return nfs4_map_errors(ret);
0400a6b0 464wait_on_recovery:
b3c2aa07
TM		 465 exception->recovering = 1;
466 return 0;
467}
468
469/* This is the error handling routine for processes that are allowed
470 * to sleep.
471 */
472int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
473{
474 struct nfs_client *clp = server->nfs_client;
475 int ret;
476
477 ret = nfs4_do_handle_exception(server, errorcode, exception);
478 if (exception->delay) {
479 ret = nfs4_delay(server->client, &exception->timeout);
480 goto out_retry;
481 }
482 if (exception->recovering) {
483 ret = nfs4_wait_clnt_recover(clp);
484 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
485 return -EIO;
486 goto out_retry;
487 }
488 return ret;
489out_retry:
a2c0b9e2
TM		 490 if (ret == 0)
491 exception->retry = 1;
492 return ret;
65de872e
TM		 493}
494
037fc980
TM		 495static int
496nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
497 int errorcode, struct nfs4_exception *exception)
498{
499 struct nfs_client *clp = server->nfs_client;
500 int ret;
501
502 ret = nfs4_do_handle_exception(server, errorcode, exception);
503 if (exception->delay) {
504 rpc_delay(task, nfs4_update_delay(&exception->timeout));
505 goto out_retry;
506 }
507 if (exception->recovering) {
508 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
509 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
510 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
511 goto out_retry;
512 }
519ae255 513 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
037fc980
TM		 514 ret = -EIO;
515 return ret;
516out_retry:
a2c0b9e2
TM		 517 if (ret == 0)
518 exception->retry = 1;
519 return ret;
65de872e
TM		 520}
521
037fc980
TM		 522static int
523nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
524 struct nfs4_state *state, long *timeout)
525{
526 struct nfs4_exception exception = {
527 .state = state,
528 };
529
530 if (task->tk_status >= 0)
531 return 0;
532 if (timeout)
533 exception.timeout = *timeout;
534 task->tk_status = nfs4_async_handle_exception(task, server,
535 task->tk_status,
536 &exception);
537 if (exception.delay && timeout)
538 *timeout = exception.timeout;
539 if (exception.retry)
540 return -EAGAIN;
541 return 0;
542}
543
a5250def
WAA		 544/*
545 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
546 * or 'false' otherwise.
547 */
548static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
549{
550 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
551
552 if (flavor == RPC_AUTH_GSS_KRB5I ||
553 flavor == RPC_AUTH_GSS_KRB5P)
554 return true;
555
556 return false;
557}
65de872e 558
452e9352 559static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 560{
1da177e4
LT		 561 spin_lock(&clp->cl_lock);
562 if (time_before(clp->cl_last_renewal,timestamp))
563 clp->cl_last_renewal = timestamp;
564 spin_unlock(&clp->cl_lock);
565}
566
452e9352
TM		 567static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
568{
be824167
TM		 569 struct nfs_client *clp = server->nfs_client;
570
571 if (!nfs4_has_session(clp))
572 do_renew_lease(clp, timestamp);
452e9352
TM		 573}
574
2a3eb2b9
CL		 575struct nfs4_call_sync_data {
576 const struct nfs_server *seq_server;
577 struct nfs4_sequence_args *seq_args;
578 struct nfs4_sequence_res *seq_res;
579};
580
be3a5d23
TM		 581void nfs4_init_sequence(struct nfs4_sequence_args *args,
582 struct nfs4_sequence_res *res, int cache_reply)
a9c92d6b
CL		 583{
584 args->sa_slot = NULL;
585 args->sa_cache_this = cache_reply;
586 args->sa_privileged = 0;
587
588 res->sr_slot = NULL;
589}
590
591static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
592{
593 args->sa_privileged = 1;
594}
595
cb04ad2a
PT		 596int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
597 struct nfs4_sequence_args *args,
598 struct nfs4_sequence_res *res,
599 struct rpc_task *task)
3bd2384a 600{
3bd2384a
CL		 601 struct nfs4_slot *slot;
602
603 /* slot already allocated? */
604 if (res->sr_slot != NULL)
605 goto out_start;
606
607 spin_lock(&tbl->slot_tbl_lock);
608 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
609 goto out_sleep;
610
611 slot = nfs4_alloc_slot(tbl);
612 if (IS_ERR(slot)) {
613 if (slot == ERR_PTR(-ENOMEM))
614 task->tk_timeout = HZ >> 2;
615 goto out_sleep;
616 }
617 spin_unlock(&tbl->slot_tbl_lock);
618
619 args->sa_slot = slot;
620 res->sr_slot = slot;
621
622out_start:
623 rpc_call_start(task);
624 return 0;
625
626out_sleep:
627 if (args->sa_privileged)
628 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
629 NULL, RPC_PRIORITY_PRIVILEGED);
630 else
631 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
632 spin_unlock(&tbl->slot_tbl_lock);
633 return -EAGAIN;
634}
cb04ad2a 635EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
3bd2384a
CL		 636
637static int nfs40_sequence_done(struct rpc_task *task,
638 struct nfs4_sequence_res *res)
639{
640 struct nfs4_slot *slot = res->sr_slot;
641 struct nfs4_slot_table *tbl;
642
cab92c19 643 if (slot == NULL)
3bd2384a
CL		 644 goto out;
645
646 tbl = slot->table;
647 spin_lock(&tbl->slot_tbl_lock);
648 if (!nfs41_wake_and_assign_slot(tbl, slot))
649 nfs4_free_slot(tbl, slot);
650 spin_unlock(&tbl->slot_tbl_lock);
651
652 res->sr_slot = NULL;
653out:
654 return 1;
655}
656
cccef3b9
AA		 657#if defined(CONFIG_NFS_V4_1)
658
d185a334 659static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 660{
e3725ec0 661 struct nfs4_session *session;
13615871 662 struct nfs4_slot_table *tbl;
a13ce7c6 663 struct nfs4_slot *slot = res->sr_slot;
c10e4498 664 bool send_new_highest_used_slotid = false;
13615871 665
a13ce7c6 666 tbl = slot->table;
e3725ec0 667 session = tbl->session;
ea028ac9 668
35dc1d74 669 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 670 /* Be nice to the server: try to ensure that the last transmitted
671 * value for highest_user_slotid <= target_highest_slotid
672 */
673 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
674 send_new_highest_used_slotid = true;
675
a13ce7c6 676 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 677 send_new_highest_used_slotid = false;
678 goto out_unlock;
679 }
a13ce7c6 680 nfs4_free_slot(tbl, slot);
c10e4498
TM		 681
682 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
683 send_new_highest_used_slotid = false;
b75ad4cd 684out_unlock:
35dc1d74 685 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 686 res->sr_slot = NULL;
c10e4498 687 if (send_new_highest_used_slotid)
3f10a6af 688 nfs41_notify_server(session->clp);
13615871
AA		 689}
690
f9c96fcc 691int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 692{
e3725ec0 693 struct nfs4_session *session;
a13ce7c6 694 struct nfs4_slot *slot = res->sr_slot;
14516c3a 695 struct nfs_client *clp;
ac20d163 696 bool interrupted = false;
85563073 697 int ret = 1;
b0df806c 698
a13ce7c6
TM		 699 if (slot == NULL)
700 goto out_noaction;
468f8613
BS		 701 /* don't increment the sequence number if the task wasn't sent */
702 if (!RPC_WAS_SENT(task))
b0df806c
AA		 703 goto out;
704
e3725ec0 705 session = slot->table->session;
933602e3 706
ac20d163
TM		 707 if (slot->interrupted) {
708 slot->interrupted = 0;
709 interrupted = true;
710 }
711
2f92ae34 712 trace_nfs4_sequence_done(session, res);
691daf3b 713 /* Check the SEQUENCE operation status */
14516c3a
TM		 714 switch (res->sr_status) {
715 case 0:
b0df806c 716 /* Update the slot's sequence and clientid lease timer */
933602e3 717 ++slot->seq_nr;
e3725ec0 718 clp = session->clp;
8e63b6a8 719 do_renew_lease(clp, res->sr_timestamp);
0629e370 720 /* Check sequence flags */
b15c7cdd 721 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
464ee9f9 722 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 723 break;
ac20d163
TM		 724 case 1:
725 /*
726 * sr_status remains 1 if an RPC level error occurred.
727 * The server may or may not have processed the sequence
728 * operation..
729 * Mark the slot as having hosted an interrupted RPC call.
730 */
731 slot->interrupted = 1;
732 goto out;
14516c3a
TM		 733 case -NFS4ERR_DELAY:
734 /* The server detected a resend of the RPC call and
735 * returned NFS4ERR_DELAY as per Section 2.10.6.2
736 * of RFC5661.
737 */
df2fabff 738 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 739 __func__,
df2fabff 740 slot->slot_nr,
933602e3 741 slot->seq_nr);
14516c3a 742 goto out_retry;
85563073
TM		 743 case -NFS4ERR_BADSLOT:
744 /*
745 * The slot id we used was probably retired. Try again
746 * using a different slot id.
747 */
e8794440
TM		 748 goto retry_nowait;
749 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 750 /*
751 * Was the last operation on this sequence interrupted?
752 * If so, retry after bumping the sequence number.
753 */
754 if (interrupted) {
755 ++slot->seq_nr;
756 goto retry_nowait;
757 }
e8794440
TM		 758 /*
759 * Could this slot have been previously retired?
760 * If so, then the server may be expecting seq_nr = 1!
761 */
8e63b6a8
TM		 762 if (slot->seq_nr != 1) {
763 slot->seq_nr = 1;
764 goto retry_nowait;
765 }
766 break;
e8794440
TM		 767 case -NFS4ERR_SEQ_FALSE_RETRY:
768 ++slot->seq_nr;
769 goto retry_nowait;
14516c3a
TM		 770 default:
771 /* Just update the slot sequence no. */
933602e3 772 ++slot->seq_nr;
b0df806c
AA		 773 }
774out:
775 /* The session may be reset by one of the error handlers. */
776 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 777 nfs41_sequence_free_slot(res);
a13ce7c6 778out_noaction:
85563073 779 return ret;
e8794440
TM		 780retry_nowait:
781 if (rpc_restart_call_prepare(task)) {
782 task->tk_status = 0;
783 ret = 0;
784 }
785 goto out;
14516c3a 786out_retry:
d05dd4e9 787 if (!rpc_restart_call(task))
14516c3a
TM		 788 goto out;
789 rpc_delay(task, NFS4_POLL_RETRY_MAX);
790 return 0;
b0df806c 791}
f9c96fcc 792EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 793
2c4b131d 794int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 795{
e3725ec0 796 if (res->sr_slot == NULL)
14516c3a 797 return 1;
3bd2384a
CL		 798 if (!res->sr_slot->table->session)
799 return nfs40_sequence_done(task, res);
14516c3a 800 return nfs41_sequence_done(task, res);
df896455 801}
2c4b131d 802EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 803
dc70d7b3 804int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 805 struct nfs4_sequence_args *args,
806 struct nfs4_sequence_res *res,
ce5039c1
AA		 807 struct rpc_task *task)
808{
fbcd4abc
AA		 809 struct nfs4_slot *slot;
810 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 811
812 dprintk("--> %s\n", __func__);
ce5039c1 813 /* slot already allocated? */
dfb4f309 814 if (res->sr_slot != NULL)
d9afbd1b 815 goto out_success;
ce5039c1 816
fbcd4abc
AA		 817 tbl = &session->fc_slot_table;
818
69d206b5
TM		 819 task->tk_timeout = 0;
820
fbcd4abc 821 spin_lock(&tbl->slot_tbl_lock);
774d5f14 822 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 823 !args->sa_privileged) {
0b1c8fc4 824 /* The state manager will wait until the slot table is empty */
0b1c8fc4 825 dprintk("%s session is draining\n", __func__);
7b939a3f 826 goto out_sleep;
689cf5c1
AB		 827 }
828
2dc03b7f 829 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 830 if (IS_ERR(slot)) {
831 /* If out of memory, try again in 1/4 second */
832 if (slot == ERR_PTR(-ENOMEM))
833 task->tk_timeout = HZ >> 2;
fbcd4abc 834 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 835 goto out_sleep;
fbcd4abc
AA		 836 }
837 spin_unlock(&tbl->slot_tbl_lock);
838
2b2fa717 839 args->sa_slot = slot;
fbcd4abc 840
e8d92382 841 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 842 slot->slot_nr, slot->seq_nr);
fbcd4abc 843
dfb4f309 844 res->sr_slot = slot;
8e63b6a8 845 res->sr_timestamp = jiffies;
2a6e26cd 846 res->sr_status_flags = 0;
fbcd4abc
AA		 847 /*
848 * sr_status is only set in decode_sequence, and so will remain
849 * set to 1 if an rpc level failure occurs.
850 */
851 res->sr_status = 1;
2f92ae34 852 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 853out_success:
854 rpc_call_start(task);
ce5039c1 855 return 0;
7b939a3f 856out_sleep:
8fe72bac
TM		 857 /* Privileged tasks are queued with top priority */
858 if (args->sa_privileged)
1e1093c7
TM		 859 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
860 NULL, RPC_PRIORITY_PRIVILEGED);
861 else
862 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 863 spin_unlock(&tbl->slot_tbl_lock);
864 return -EAGAIN;
ce5039c1 865}
dc70d7b3 866EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 867
5a580e0a
CL		 868static int nfs4_setup_sequence(const struct nfs_server *server,
869 struct nfs4_sequence_args *args,
870 struct nfs4_sequence_res *res,
871 struct rpc_task *task)
ce5039c1 872{
035168ab 873 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 874 int ret = 0;
875
3bd2384a 876 if (!session)
cb04ad2a
PT		 877 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
878 args, res, task);
035168ab 879
e8d92382 880 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 881 __func__, session->clp, session, res->sr_slot ?
e8d92382 882 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 883
9d12b216 884 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 885
ce5039c1
AA		 886 dprintk("<-- %s status=%d\n", __func__, ret);
887 return ret;
888}
889
ce5039c1
AA		 890static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
891{
2a3eb2b9 892 struct nfs4_call_sync_data *data = calldata;
6ba7db34 893 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 894
035168ab
TM		 895 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
896
d9afbd1b 897 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 898}
899
69ab40c4
AA		 900static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
901{
2a3eb2b9 902 struct nfs4_call_sync_data *data = calldata;
69ab40c4 903
14516c3a 904 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 905}
906
17280175 907static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 908 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 909 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 910};
911
3bd2384a
CL		 912#else /* !CONFIG_NFS_V4_1 */
913
9915ea7e
CL		 914static int nfs4_setup_sequence(const struct nfs_server *server,
915 struct nfs4_sequence_args *args,
916 struct nfs4_sequence_res *res,
917 struct rpc_task *task)
918{
cb04ad2a
PT		 919 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
920 args, res, task);
9915ea7e
CL		 921}
922
2c4b131d
PT		 923int nfs4_sequence_done(struct rpc_task *task,
924 struct nfs4_sequence_res *res)
9915ea7e 925{
3bd2384a 926 return nfs40_sequence_done(task, res);
9915ea7e 927}
2c4b131d 928EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 929
930#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 931
932static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
933{
934 struct nfs4_call_sync_data *data = calldata;
935 nfs4_setup_sequence(data->seq_server,
936 data->seq_args, data->seq_res, task);
937}
938
939static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
940{
941 struct nfs4_call_sync_data *data = calldata;
942 nfs4_sequence_done(task, data->seq_res);
943}
944
945static const struct rpc_call_ops nfs40_call_sync_ops = {
946 .rpc_call_prepare = nfs40_call_sync_prepare,
947 .rpc_call_done = nfs40_call_sync_done,
948};
949
7c513058
BS		 950static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
951 struct nfs_server *server,
ce5039c1
AA		 952 struct rpc_message *msg,
953 struct nfs4_sequence_args *args,
8fe72bac 954 struct nfs4_sequence_res *res)
ce5039c1
AA		 955{
956 int ret;
957 struct rpc_task *task;
9915ea7e 958 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 959 struct nfs4_call_sync_data data = {
035168ab 960 .seq_server = server,
ce5039c1
AA		 961 .seq_args = args,
962 .seq_res = res,
ce5039c1
AA		 963 };
964 struct rpc_task_setup task_setup = {
7c513058 965 .rpc_client = clnt,
ce5039c1 966 .rpc_message = msg,
9915ea7e 967 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 968 .callback_data = &data
969 };
970
ce5039c1
AA		 971 task = rpc_run_task(&task_setup);
972 if (IS_ERR(task))
973 ret = PTR_ERR(task);
974 else {
975 ret = task->tk_status;
976 rpc_put_task(task);
977 }
978 return ret;
979}
980
7c513058
BS		 981int nfs4_call_sync(struct rpc_clnt *clnt,
982 struct nfs_server *server,
e73b83f2
BS		 983 struct rpc_message *msg,
984 struct nfs4_sequence_args *args,
985 struct nfs4_sequence_res *res,
986 int cache_reply)
987{
a9c92d6b 988 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 989 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 990}
cccef3b9 991
38478b24 992static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 993{
38478b24 994 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 995
38478b24 996 spin_lock(&dir->i_lock);
359d7d1c 997 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 998 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 999 nfs_force_lookup_revalidate(dir);
a9a4a87a 1000 dir->i_version = cinfo->after;
3235b403 1001 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
de242c0b 1002 nfs_fscache_invalidate(dir);
38478b24 1003 spin_unlock(&dir->i_lock);
1da177e4
LT		 1004}
1005
e56e0b78 1006struct nfs4_opendata {
c6d00e63 1007 struct kref kref;
e56e0b78
TM		 1008 struct nfs_openargs o_arg;
1009 struct nfs_openres o_res;
cdd4e68b
TM		 1010 struct nfs_open_confirmargs c_arg;
1011 struct nfs_open_confirmres c_res;
6926afd1
TM		 1012 struct nfs4_string owner_name;
1013 struct nfs4_string group_name;
a49c2691 1014 struct nfs4_label *a_label;
e56e0b78 1015 struct nfs_fattr f_attr;
1775fd3e 1016 struct nfs4_label *f_label;
e56e0b78 1017 struct dentry *dir;
82a2c1b7 1018 struct dentry *dentry;
e56e0b78 1019 struct nfs4_state_owner *owner;
aac00a8d 1020 struct nfs4_state *state;
e56e0b78 1021 struct iattr attrs;
26e976a8 1022 unsigned long timestamp;
3e309914 1023 unsigned int rpc_done : 1;
5bc2afc2 1024 unsigned int file_created : 1;
bdeca1b7 1025 unsigned int is_recover : 1;
24ac23ab
TM		 1026 int rpc_status;
1027 int cancelled;
e56e0b78
TM		 1028};
1029
49f9a0fa
TM		 1030static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1031 int err, struct nfs4_exception *exception)
1032{
1033 if (err != -EINVAL)
1034 return false;
1035 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1036 return false;
1037 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1038 exception->retry = 1;
1039 return true;
1040}
1041
6ae37339
TM		 1042static u32
1043nfs4_map_atomic_open_share(struct nfs_server *server,
1044 fmode_t fmode, int openflags)
1045{
1046 u32 res = 0;
1047
1048 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1049 case FMODE_READ:
1050 res = NFS4_SHARE_ACCESS_READ;
1051 break;
1052 case FMODE_WRITE:
1053 res = NFS4_SHARE_ACCESS_WRITE;
1054 break;
1055 case FMODE_READ|FMODE_WRITE:
1056 res = NFS4_SHARE_ACCESS_BOTH;
1057 }
1058 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1059 goto out;
1060 /* Want no delegation if we're using O_DIRECT */
1061 if (openflags & O_DIRECT)
1062 res |= NFS4_SHARE_WANT_NO_DELEG;
1063out:
1064 return res;
1065}
1066
49f9a0fa
TM		 1067static enum open_claim_type4
1068nfs4_map_atomic_open_claim(struct nfs_server *server,
1069 enum open_claim_type4 claim)
1070{
1071 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1072 return claim;
1073 switch (claim) {
1074 default:
1075 return claim;
1076 case NFS4_OPEN_CLAIM_FH:
1077 return NFS4_OPEN_CLAIM_NULL;
1078 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1079 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1080 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1081 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1082 }
1083}
2ced46c2
TM		 1084
1085static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1086{
1087 p->o_res.f_attr = &p->f_attr;
1775fd3e 1088 p->o_res.f_label = p->f_label;
c1d51931
TM		 1089 p->o_res.seqid = p->o_arg.seqid;
1090 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 1091 p->o_res.server = p->o_arg.server;
5f657530 1092 p->o_res.access_request = p->o_arg.access;
2ced46c2 1093 nfs_fattr_init(&p->f_attr);
6926afd1 1094 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 1095}
1096
82a2c1b7 1097static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 1098 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 1099 const struct iattr *attrs,
1775fd3e 1100 struct nfs4_label *label,
4a1c0893 1101 enum open_claim_type4 claim,
8535b2be 1102 gfp_t gfp_mask)
e56e0b78 1103{
82a2c1b7 1104 struct dentry *parent = dget_parent(dentry);
2b0143b5 1105 struct inode *dir = d_inode(parent);
e56e0b78 1106 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1107 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 1108 struct nfs4_opendata *p;
1109
8535b2be 1110 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1111 if (p == NULL)
1112 goto err;
14c43f76
DQ		 1113
1114 p->f_label = nfs4_label_alloc(server, gfp_mask);
1115 if (IS_ERR(p->f_label))
1116 goto err_free_p;
1117
a49c2691
KM		 1118 p->a_label = nfs4_label_alloc(server, gfp_mask);
1119 if (IS_ERR(p->a_label))
1120 goto err_free_f;
1121
63f5f796
TM		 1122 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1123 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1124 if (IS_ERR(p->o_arg.seqid))
14c43f76 1125 goto err_free_label;
82a2c1b7
AV		 1126 nfs_sb_active(dentry->d_sb);
1127 p->dentry = dget(dentry);
e56e0b78
TM		 1128 p->dir = parent;
1129 p->owner = sp;
1130 atomic_inc(&sp->so_count);
dc0b027d
TM		 1131 p->o_arg.open_flags = flags;
1132 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
6ae37339
TM		 1133 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1134 fmode, flags);
ae2bb032
WAA		 1135 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1136 * will return permission denied for all bits until close */
1137 if (!(flags & O_EXCL)) {
1138 /* ask server to check for all possible rights as results
1139 * are cached */
1140 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1141 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1142 }
7539bbab 1143 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1144 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1145 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1146 p->o_arg.name = &dentry->d_name;
e56e0b78 1147 p->o_arg.server = server;
aa9c2669 1148 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1149 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
a49c2691 1150 p->o_arg.label = nfs4_label_copy(p->a_label, label);
49f9a0fa
TM		 1151 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1152 switch (p->o_arg.claim) {
4a1c0893
TM		 1153 case NFS4_OPEN_CLAIM_NULL:
1154 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1155 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1156 p->o_arg.fh = NFS_FH(dir);
1157 break;
1158 case NFS4_OPEN_CLAIM_PREVIOUS:
1159 case NFS4_OPEN_CLAIM_FH:
1160 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1161 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1162 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1163 }
536e43d1 1164 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1165 __u32 verf[2];
d77d76ff 1166
e56e0b78
TM		 1167 p->o_arg.u.attrs = &p->attrs;
1168 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1169
1170 verf[0] = jiffies;
1171 verf[1] = current->pid;
1172 memcpy(p->o_arg.u.verifier.data, verf,
1173 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1174 }
cdd4e68b
TM		 1175 p->c_arg.fh = &p->o_res.fh;
1176 p->c_arg.stateid = &p->o_res.stateid;
1177 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1178 nfs4_init_opendata_res(p);
c6d00e63 1179 kref_init(&p->kref);
e56e0b78 1180 return p;
14c43f76
DQ		 1181
1182err_free_label:
a49c2691
KM		 1183 nfs4_label_free(p->a_label);
1184err_free_f:
14c43f76
DQ		 1185 nfs4_label_free(p->f_label);
1186err_free_p:
e56e0b78
TM		 1187 kfree(p);
1188err:
1189 dput(parent);
1190 return NULL;
1191}
1192
c6d00e63 1193static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1194{
c6d00e63
TM		 1195 struct nfs4_opendata *p = container_of(kref,
1196 struct nfs4_opendata, kref);
82a2c1b7 1197 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1198
1199 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1200 if (p->state != NULL)
1201 nfs4_put_open_state(p->state);
c6d00e63 1202 nfs4_put_state_owner(p->owner);
14c43f76 1203
a49c2691 1204 nfs4_label_free(p->a_label);
14c43f76
DQ		 1205 nfs4_label_free(p->f_label);
1206
c6d00e63 1207 dput(p->dir);
82a2c1b7
AV		 1208 dput(p->dentry);
1209 nfs_sb_deactive(sb);
6926afd1 1210 nfs_fattr_free_names(&p->f_attr);
e911b815 1211 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1212 kfree(p);
1213}
1214
1215static void nfs4_opendata_put(struct nfs4_opendata *p)
1216{
1217 if (p != NULL)
1218 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1219}
1220
06f814a3
TM		 1221static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1222{
06f814a3
TM		 1223 int ret;
1224
06f814a3 1225 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1226 return ret;
1227}
1228
24311f88
TM		 1229static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1230 fmode_t fmode)
1231{
1232 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1233 case FMODE_READ|FMODE_WRITE:
1234 return state->n_rdwr != 0;
1235 case FMODE_WRITE:
1236 return state->n_wronly != 0;
1237 case FMODE_READ:
1238 return state->n_rdonly != 0;
1239 }
1240 WARN_ON_ONCE(1);
1241 return false;
1242}
1243
dc0b027d 1244static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1245{
1246 int ret = 0;
dc0b027d 1247
536e43d1 1248 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1249 goto out;
1250 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1251 case FMODE_READ:
88069f77
TM		 1252 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1253 && state->n_rdonly != 0;
6ee41268
TM		 1254 break;
1255 case FMODE_WRITE:
88069f77
TM		 1256 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1257 && state->n_wronly != 0;
6ee41268
TM		 1258 break;
1259 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1260 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1261 && state->n_rdwr != 0;
6ee41268 1262 }
dc0b027d 1263out:
6ee41268
TM		 1264 return ret;
1265}
1266
2a606188
TM		 1267static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1268 enum open_claim_type4 claim)
aac00a8d 1269{
652f89f6
TM		 1270 if (delegation == NULL)
1271 return 0;
dc0b027d 1272 if ((delegation->type & fmode) != fmode)
aac00a8d 1273 return 0;
d25be546
TM		 1274 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1275 return 0;
2a606188
TM		 1276 switch (claim) {
1277 case NFS4_OPEN_CLAIM_NULL:
1278 case NFS4_OPEN_CLAIM_FH:
1279 break;
1280 case NFS4_OPEN_CLAIM_PREVIOUS:
1281 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1282 break;
1283 default:
1284 return 0;
1285 }
b7391f44 1286 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1287 return 1;
1288}
1289
dc0b027d 1290static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1291{
dc0b027d 1292 switch (fmode) {
e7616923
TM		 1293 case FMODE_WRITE:
1294 state->n_wronly++;
1295 break;
1296 case FMODE_READ:
1297 state->n_rdonly++;
1298 break;
1299 case FMODE_READ|FMODE_WRITE:
1300 state->n_rdwr++;
1301 }
dc0b027d 1302 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1303}
1304
4f14c194
TM		 1305static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1306{
1307 struct nfs_client *clp = state->owner->so_server->nfs_client;
1308 bool need_recover = false;
1309
1310 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1311 need_recover = true;
1312 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1313 need_recover = true;
1314 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1315 need_recover = true;
1316 if (need_recover)
1317 nfs4_state_mark_reclaim_nograce(clp, state);
1318}
1319
e999e80e
TM		 1320static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1321 nfs4_stateid *stateid)
1322{
1323 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1324 return true;
4f14c194
TM		 1325 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1326 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1327 return true;
4f14c194 1328 }
e999e80e
TM		 1329 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1330 return true;
1331 return false;
1332}
1333
f95549cf
TM		 1334static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1335{
3c38cbe2
TM		 1336 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1337 return;
f95549cf
TM		 1338 if (state->n_wronly)
1339 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1340 if (state->n_rdonly)
1341 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1342 if (state->n_rdwr)
1343 set_bit(NFS_O_RDWR_STATE, &state->flags);
3c38cbe2 1344 set_bit(NFS_OPEN_STATE, &state->flags);
f95549cf
TM		 1345}
1346
226056c5 1347static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
4a1e2feb 1348 nfs4_stateid *arg_stateid,
226056c5 1349 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1350{
226056c5
TM		 1351 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1352 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1353 case FMODE_WRITE:
1354 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1355 break;
1356 case FMODE_READ:
1357 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1358 break;
1359 case 0:
1360 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1361 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1362 clear_bit(NFS_OPEN_STATE, &state->flags);
1363 }
1364 if (stateid == NULL)
1365 return;
f95549cf 1366 /* Handle races with OPEN */
4a1e2feb
TM		 1367 if (!nfs4_stateid_match_other(arg_stateid, &state->open_stateid) ||
1368 (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1369 !nfs4_stateid_is_newer(stateid, &state->open_stateid))) {
f95549cf 1370 nfs_resync_open_stateid_locked(state);
226056c5 1371 return;
f95549cf 1372 }
003707c7 1373 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1374 nfs4_stateid_copy(&state->stateid, stateid);
1375 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1376}
1377
4a1e2feb
TM		 1378static void nfs_clear_open_stateid(struct nfs4_state *state,
1379 nfs4_stateid *arg_stateid,
1380 nfs4_stateid *stateid, fmode_t fmode)
226056c5
TM		 1381{
1382 write_seqlock(&state->seqlock);
4a1e2feb 1383 nfs_clear_open_stateid_locked(state, arg_stateid, stateid, fmode);
226056c5 1384 write_sequnlock(&state->seqlock);
4f14c194
TM		 1385 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1386 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1387}
1388
dc0b027d 1389static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1390{
dc0b027d 1391 switch (fmode) {
003707c7
TM		 1392 case FMODE_READ:
1393 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1394 break;
1395 case FMODE_WRITE:
1396 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1397 break;
1398 case FMODE_READ|FMODE_WRITE:
1399 set_bit(NFS_O_RDWR_STATE, &state->flags);
1400 }
e999e80e
TM		 1401 if (!nfs_need_update_open_stateid(state, stateid))
1402 return;
1403 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1404 nfs4_stateid_copy(&state->stateid, stateid);
1405 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1406}
1407
dc0b027d 1408static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1409{
8bda4e4c
TM		 1410 /*
1411 * Protect the call to nfs4_state_set_mode_locked and
1412 * serialise the stateid update
1413 */
361cad3c 1414 spin_lock(&state->owner->so_lock);
8bda4e4c 1415 write_seqlock(&state->seqlock);
003707c7 1416 if (deleg_stateid != NULL) {
f597c537 1417 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1418 set_bit(NFS_DELEGATED_STATE, &state->flags);
1419 }
1420 if (open_stateid != NULL)
dc0b027d 1421 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c 1422 write_sequnlock(&state->seqlock);
dc0b027d 1423 update_open_stateflags(state, fmode);
ec073428 1424 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1425}
1426
dc0b027d 1427static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1428{
1429 struct nfs_inode *nfsi = NFS_I(state->inode);
1430 struct nfs_delegation *deleg_cur;
1431 int ret = 0;
1432
dc0b027d 1433 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1434
1435 rcu_read_lock();
1436 deleg_cur = rcu_dereference(nfsi->delegation);
1437 if (deleg_cur == NULL)
1438 goto no_delegation;
1439
1440 spin_lock(&deleg_cur->lock);
17f26b12 1441 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1442 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1443 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1444 goto no_delegation_unlock;
1445
1446 if (delegation == NULL)
1447 delegation = &deleg_cur->stateid;
f597c537 1448 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1449 goto no_delegation_unlock;
1450
b7391f44 1451 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1452 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1453 ret = 1;
1454no_delegation_unlock:
1455 spin_unlock(&deleg_cur->lock);
1456no_delegation:
1457 rcu_read_unlock();
1458
1459 if (!ret && open_stateid != NULL) {
dc0b027d 1460 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1461 ret = 1;
1462 }
4f14c194
TM		 1463 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1464 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1465
1466 return ret;
1467}
1468
39071e6f
TM		 1469static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1470 const nfs4_stateid *stateid)
1471{
1472 struct nfs4_state *state = lsp->ls_state;
1473 bool ret = false;
1474
1475 spin_lock(&state->state_lock);
1476 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1477 goto out_noupdate;
1478 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1479 goto out_noupdate;
1480 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1481 ret = true;
1482out_noupdate:
1483 spin_unlock(&state->state_lock);
1484 return ret;
1485}
34310430 1486
dc0b027d 1487static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1488{
1489 struct nfs_delegation *delegation;
1490
1491 rcu_read_lock();
1492 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1493 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1494 rcu_read_unlock();
1495 return;
1496 }
1497 rcu_read_unlock();
57ec14c5 1498 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1499}
1500
6ee41268 1501static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1502{
1503 struct nfs4_state *state = opendata->state;
1504 struct nfs_inode *nfsi = NFS_I(state->inode);
1505 struct nfs_delegation *delegation;
f448badd 1506 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1507 fmode_t fmode = opendata->o_arg.fmode;
2a606188 1508 enum open_claim_type4 claim = opendata->o_arg.claim;
aac00a8d
TM		 1509 nfs4_stateid stateid;
1510 int ret = -EAGAIN;
1511
aac00a8d 1512 for (;;) {
61beef75 1513 spin_lock(&state->owner->so_lock);
dc0b027d 1514 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1515 update_open_stateflags(state, fmode);
6ee41268 1516 spin_unlock(&state->owner->so_lock);
61beef75 1517 goto out_return_state;
6ee41268 1518 }
61beef75 1519 spin_unlock(&state->owner->so_lock);
34310430
TM		 1520 rcu_read_lock();
1521 delegation = rcu_dereference(nfsi->delegation);
2a606188 1522 if (!can_open_delegated(delegation, fmode, claim)) {
34310430 1523 rcu_read_unlock();
aac00a8d 1524 break;
34310430 1525 }
aac00a8d 1526 /* Save the delegation */
f597c537 1527 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1528 rcu_read_unlock();
fa332941 1529 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1530 if (!opendata->is_recover) {
1531 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1532 if (ret != 0)
1533 goto out;
1534 }
aac00a8d 1535 ret = -EAGAIN;
34310430
TM		 1536
1537 /* Try to update the stateid using the delegation */
dc0b027d 1538 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1539 goto out_return_state;
aac00a8d 1540 }
aac00a8d
TM		 1541out:
1542 return ERR_PTR(ret);
1543out_return_state:
1544 atomic_inc(&state->count);
1545 return state;
1546}
1547
e23008ec
AA		 1548static void
1549nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1550{
1551 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1552 struct nfs_delegation *delegation;
1553 int delegation_flags = 0;
1554
1555 rcu_read_lock();
1556 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1557 if (delegation)
1558 delegation_flags = delegation->flags;
1559 rcu_read_unlock();
72d79ff8
TM		 1560 switch (data->o_arg.claim) {
1561 default:
1562 break;
1563 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1564 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
e23008ec
AA		 1565 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1566 "returning a delegation for "
1567 "OPEN(CLAIM_DELEGATE_CUR)\n",
1568 clp->cl_hostname);
72d79ff8
TM		 1569 return;
1570 }
1571 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
e23008ec
AA		 1572 nfs_inode_set_delegation(state->inode,
1573 data->owner->so_cred,
1574 &data->o_res);
1575 else
1576 nfs_inode_reclaim_delegation(state->inode,
1577 data->owner->so_cred,
1578 &data->o_res);
1579}
1580
1581/*
1582 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1583 * and update the nfs4_state.
1584 */
1585static struct nfs4_state *
1586_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1587{
1588 struct inode *inode = data->state->inode;
1589 struct nfs4_state *state = data->state;
1590 int ret;
1591
d2bfda2e
WAA		 1592 if (!data->rpc_done) {
1593 if (data->rpc_status) {
1594 ret = data->rpc_status;
1595 goto err;
1596 }
1597 /* cached opens have already been processed */
1598 goto update;
e23008ec
AA		 1599 }
1600
e23008ec
AA		 1601 ret = nfs_refresh_inode(inode, &data->f_attr);
1602 if (ret)
1603 goto err;
1604
1605 if (data->o_res.delegation_type != 0)
1606 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1607update:
e23008ec
AA		 1608 update_open_stateid(state, &data->o_res.stateid, NULL,
1609 data->o_arg.fmode);
d49f042a 1610 atomic_inc(&state->count);
e23008ec
AA		 1611
1612 return state;
1613err:
1614 return ERR_PTR(ret);
1615
1616}
1617
1618static struct nfs4_state *
1619_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1620{
1621 struct inode *inode;
1622 struct nfs4_state *state = NULL;
1b370bc2 1623 int ret;
24ac23ab 1624
aac00a8d 1625 if (!data->rpc_done) {
6ee41268 1626 state = nfs4_try_open_cached(data);
9759b0fb 1627 trace_nfs4_cached_open(data->state);
aac00a8d
TM		 1628 goto out;
1629 }
1630
1b370bc2 1631 ret = -EAGAIN;
24ac23ab 1632 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1633 goto err;
1775fd3e 1634 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1635 ret = PTR_ERR(inode);
03f28e3a 1636 if (IS_ERR(inode))
1b370bc2
TM		 1637 goto err;
1638 ret = -ENOMEM;
24ac23ab
TM		 1639 state = nfs4_get_open_state(inode, data->owner);
1640 if (state == NULL)
1b370bc2 1641 goto err_put_inode;
e23008ec
AA		 1642 if (data->o_res.delegation_type != 0)
1643 nfs4_opendata_check_deleg(data, state);
34310430 1644 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1645 data->o_arg.fmode);
24ac23ab 1646 iput(inode);
aac00a8d 1647out:
7aa262b5 1648 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1649 return state;
1b370bc2
TM		 1650err_put_inode:
1651 iput(inode);
1652err:
1653 return ERR_PTR(ret);
24ac23ab
TM		 1654}
1655
e23008ec
AA		 1656static struct nfs4_state *
1657nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1658{
1659 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1660 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1661 return _nfs4_opendata_to_nfs4_state(data);
1662}
1663
864472e9
TM		 1664static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1665{
1666 struct nfs_inode *nfsi = NFS_I(state->inode);
1667 struct nfs_open_context *ctx;
1668
1669 spin_lock(&state->inode->i_lock);
1670 list_for_each_entry(ctx, &nfsi->open_files, list) {
1671 if (ctx->state != state)
1672 continue;
1673 get_nfs_open_context(ctx);
1674 spin_unlock(&state->inode->i_lock);
1675 return ctx;
1676 }
1677 spin_unlock(&state->inode->i_lock);
1678 return ERR_PTR(-ENOENT);
1679}
1680
4a1c0893
TM		 1681static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1682 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1683{
1684 struct nfs4_opendata *opendata;
1685
4a1c0893 1686 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1687 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1688 if (opendata == NULL)
1689 return ERR_PTR(-ENOMEM);
1690 opendata->state = state;
1691 atomic_inc(&state->count);
1692 return opendata;
1693}
1694
24311f88
TM		 1695static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1696 fmode_t fmode)
864472e9 1697{
2ced46c2 1698 struct nfs4_state *newstate;
864472e9
TM		 1699 int ret;
1700
24311f88 1701 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
39f897fd 1702 return 0;
dc0b027d
TM		 1703 opendata->o_arg.open_flags = 0;
1704 opendata->o_arg.fmode = fmode;
be36e185
TM		 1705 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1706 NFS_SB(opendata->dentry->d_sb),
1707 fmode, 0);
2ced46c2
TM		 1708 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1709 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1710 nfs4_init_opendata_res(opendata);
b257957e 1711 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1712 if (ret != 0)
1713 return ret;
2ced46c2 1714 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1715 if (IS_ERR(newstate))
1716 return PTR_ERR(newstate);
24311f88
TM		 1717 if (newstate != opendata->state)
1718 ret = -ESTALE;
643168c2 1719 nfs4_close_state(newstate, fmode);
24311f88 1720 return ret;
864472e9
TM		 1721}
1722
1723static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1724{
864472e9
TM		 1725 int ret;
1726
4f14c194
TM		 1727 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1728 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1729 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1730 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1731 /* memory barrier prior to reading state->n_* */
2ced46c2 1732 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1733 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9 1734 smp_rmb();
24311f88
TM		 1735 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1736 if (ret != 0)
1737 return ret;
1738 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1739 if (ret != 0)
1740 return ret;
1741 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1742 if (ret != 0)
1743 return ret;
1ac7e2fd
TM		 1744 /*
1745 * We may have performed cached opens for all three recoveries.
1746 * Check if we need to update the current stateid.
1747 */
1748 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1749 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1750 write_seqlock(&state->seqlock);
1ac7e2fd 1751 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1752 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1753 write_sequnlock(&state->seqlock);
1ac7e2fd 1754 }
864472e9
TM		 1755 return 0;
1756}
1757
1da177e4
LT		 1758/*
1759 * OPEN_RECLAIM:
1760 * reclaim state on the server after a reboot.
1da177e4 1761 */
539cd03a 1762static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1763{
1ac7e2fd 1764 struct nfs_delegation *delegation;
864472e9 1765 struct nfs4_opendata *opendata;
dc0b027d 1766 fmode_t delegation_type = 0;
1da177e4
LT		 1767 int status;
1768
4a1c0893
TM		 1769 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1770 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1771 if (IS_ERR(opendata))
1772 return PTR_ERR(opendata);
1ac7e2fd
TM		 1773 rcu_read_lock();
1774 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1775 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1776 delegation_type = delegation->type;
1ac7e2fd 1777 rcu_read_unlock();
864472e9
TM		 1778 opendata->o_arg.u.delegation_type = delegation_type;
1779 status = nfs4_open_recover(opendata, state);
c6d00e63 1780 nfs4_opendata_put(opendata);
1da177e4
LT		 1781 return status;
1782}
1783
539cd03a 1784static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1785{
1786 struct nfs_server *server = NFS_SERVER(state->inode);
1787 struct nfs4_exception exception = { };
1788 int err;
1789 do {
539cd03a 1790 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1791 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1792 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1793 continue;
168667c4 1794 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1795 break;
1796 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1797 } while (exception.retry);
1798 return err;
1799}
1800
864472e9
TM		 1801static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1802{
1803 struct nfs_open_context *ctx;
1804 int ret;
1805
1806 ctx = nfs4_state_find_open_context(state);
1807 if (IS_ERR(ctx))
91876b13 1808 return -EAGAIN;
539cd03a 1809 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1810 put_nfs_open_context(ctx);
1811 return ret;
1812}
1813
db4f2e63 1814static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1815{
be76b5b6
TM		 1816 switch (err) {
1817 default:
1818 printk(KERN_ERR "NFS: %s: unhandled error "
1819 "%d.\n", __func__, err);
1820 case 0:
1821 case -ENOENT:
8eee52af 1822 case -EAGAIN:
be76b5b6
TM		 1823 case -ESTALE:
1824 break;
1825 case -NFS4ERR_BADSESSION:
1826 case -NFS4ERR_BADSLOT:
1827 case -NFS4ERR_BAD_HIGH_SLOT:
1828 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1829 case -NFS4ERR_DEADSESSION:
1830 set_bit(NFS_DELEGATED_STATE, &state->flags);
1831 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1832 return -EAGAIN;
1833 case -NFS4ERR_STALE_CLIENTID:
1834 case -NFS4ERR_STALE_STATEID:
1835 set_bit(NFS_DELEGATED_STATE, &state->flags);
1836 case -NFS4ERR_EXPIRED:
1837 /* Don't recall a delegation if it was lost */
1838 nfs4_schedule_lease_recovery(server->nfs_client);
1839 return -EAGAIN;
352297b9
CL		 1840 case -NFS4ERR_MOVED:
1841 nfs4_schedule_migration_recovery(server);
1842 return -EAGAIN;
8ef2f8d4
CL		 1843 case -NFS4ERR_LEASE_MOVED:
1844 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1845 return -EAGAIN;
be76b5b6
TM		 1846 case -NFS4ERR_DELEG_REVOKED:
1847 case -NFS4ERR_ADMIN_REVOKED:
1848 case -NFS4ERR_BAD_STATEID:
db4f2e63 1849 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1850 nfs_inode_find_state_and_recover(state->inode,
1851 stateid);
1852 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1853 return -EAGAIN;
be76b5b6
TM		 1854 case -NFS4ERR_DELAY:
1855 case -NFS4ERR_GRACE:
1856 set_bit(NFS_DELEGATED_STATE, &state->flags);
1857 ssleep(1);
1858 return -EAGAIN;
db4f2e63
TM		 1859 case -ENOMEM:
1860 case -NFS4ERR_DENIED:
1861 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1862 return 0;
be76b5b6 1863 }
1da177e4
LT		 1864 return err;
1865}
1866
24311f88
TM		 1867int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
1868 struct nfs4_state *state, const nfs4_stateid *stateid,
1869 fmode_t type)
db4f2e63
TM		 1870{
1871 struct nfs_server *server = NFS_SERVER(state->inode);
1872 struct nfs4_opendata *opendata;
24311f88 1873 int err = 0;
db4f2e63
TM		 1874
1875 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1876 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1877 if (IS_ERR(opendata))
1878 return PTR_ERR(opendata);
1879 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
5e99b532
JL		 1880 write_seqlock(&state->seqlock);
1881 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1882 write_sequnlock(&state->seqlock);
24311f88
TM		 1883 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1884 switch (type & (FMODE_READ|FMODE_WRITE)) {
1885 case FMODE_READ|FMODE_WRITE:
1886 case FMODE_WRITE:
1887 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1888 if (err)
1889 break;
1890 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1891 if (err)
1892 break;
1893 case FMODE_READ:
1894 err = nfs4_open_recover_helper(opendata, FMODE_READ);
1895 }
db4f2e63
TM		 1896 nfs4_opendata_put(opendata);
1897 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1898}
1899
be05c860
CL		 1900static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1901{
1902 struct nfs4_opendata *data = calldata;
1903
cb04ad2a
PT		 1904 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1905 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 1906}
1907
cdd4e68b
TM		 1908static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1909{
1910 struct nfs4_opendata *data = calldata;
1911
17ead6c8 1912 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1913
cdd4e68b 1914 data->rpc_status = task->tk_status;
26e976a8 1915 if (data->rpc_status == 0) {
f597c537 1916 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1917 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1918 renew_lease(data->o_res.server, data->timestamp);
3e309914 1919 data->rpc_done = 1;
26e976a8 1920 }
cdd4e68b
TM		 1921}
1922
1923static void nfs4_open_confirm_release(void *calldata)
1924{
1925 struct nfs4_opendata *data = calldata;
1926 struct nfs4_state *state = NULL;
1927
1928 /* If this request hasn't been cancelled, do nothing */
1929 if (data->cancelled == 0)
1930 goto out_free;
1931 /* In case of error, no cleanup! */
3e309914 1932 if (!data->rpc_done)
cdd4e68b 1933 goto out_free;
cdd4e68b 1934 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1935 if (!IS_ERR(state))
643168c2 1936 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1937out_free:
c6d00e63 1938 nfs4_opendata_put(data);
cdd4e68b
TM		 1939}
1940
1941static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1942 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1943 .rpc_call_done = nfs4_open_confirm_done,
1944 .rpc_release = nfs4_open_confirm_release,
1945};
1946
1947/*
1948 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1949 */
1950static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1951{
2b0143b5 1952 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 1953 struct rpc_task *task;
5138fde0
TM		 1954 struct rpc_message msg = {
1955 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1956 .rpc_argp = &data->c_arg,
1957 .rpc_resp = &data->c_res,
1958 .rpc_cred = data->owner->so_cred,
1959 };
c970aa85
TM		 1960 struct rpc_task_setup task_setup_data = {
1961 .rpc_client = server->client,
5138fde0 1962 .rpc_message = &msg,
c970aa85
TM		 1963 .callback_ops = &nfs4_open_confirm_ops,
1964 .callback_data = data,
101070ca 1965 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1966 .flags = RPC_TASK_ASYNC,
1967 };
1da177e4
LT		 1968 int status;
1969
17ead6c8 1970 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1971 kref_get(&data->kref);
3e309914
TM		 1972 data->rpc_done = 0;
1973 data->rpc_status = 0;
5138fde0 1974 data->timestamp = jiffies;
e92c1e0d
BC		 1975 if (data->is_recover)
1976 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
c970aa85 1977 task = rpc_run_task(&task_setup_data);
7a1218a2 1978 if (IS_ERR(task))
cdd4e68b 1979 return PTR_ERR(task);
cdd4e68b
TM		 1980 status = nfs4_wait_for_completion_rpc_task(task);
1981 if (status != 0) {
1982 data->cancelled = 1;
1983 smp_wmb();
1984 } else
1985 status = data->rpc_status;
e6b3c4db 1986 rpc_put_task(task);
1da177e4
LT		 1987 return status;
1988}
1989
24ac23ab 1990static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1991{
24ac23ab
TM		 1992 struct nfs4_opendata *data = calldata;
1993 struct nfs4_state_owner *sp = data->owner;
549b19cc 1994 struct nfs_client *clp = sp->so_server->nfs_client;
2a606188 1995 enum open_claim_type4 claim = data->o_arg.claim;
5138fde0 1996
24ac23ab 1997 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1998 goto out_wait;
aac00a8d
TM		 1999 /*
2000 * Check if we still need to send an OPEN call, or if we can use
2001 * a delegation instead.
2002 */
2003 if (data->state != NULL) {
2004 struct nfs_delegation *delegation;
2005
dc0b027d 2006 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 2007 goto out_no_action;
aac00a8d
TM		 2008 rcu_read_lock();
2009 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2a606188 2010 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
652f89f6 2011 goto unlock_no_action;
aac00a8d
TM		 2012 rcu_read_unlock();
2013 }
95b72eb0 2014 /* Update client id. */
549b19cc 2015 data->o_arg.clientid = clp->cl_clientid;
2a606188
TM		 2016 switch (claim) {
2017 default:
2018 break;
8188df17
TM		 2019 case NFS4_OPEN_CLAIM_PREVIOUS:
2020 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2021 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 2022 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 2023 case NFS4_OPEN_CLAIM_FH:
2024 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 2025 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
2026 }
26e976a8 2027 data->timestamp = jiffies;
035168ab 2028 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 2029 &data->o_arg.seq_args,
2240a9e2
TM		 2030 &data->o_res.seq_res,
2031 task) != 0)
2032 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 2033
2034 /* Set the create mode (note dependency on the session type) */
2035 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2036 if (data->o_arg.open_flags & O_EXCL) {
2037 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2038 if (nfs4_has_persistent_session(clp))
2039 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2040 else if (clp->cl_mvops->minor_version > 0)
2041 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2042 }
6ee41268 2043 return;
652f89f6 2044unlock_no_action:
9759b0fb 2045 trace_nfs4_cached_open(data->state);
652f89f6 2046 rcu_read_unlock();
6ee41268
TM		 2047out_no_action:
2048 task->tk_action = NULL;
c8da19b9 2049out_wait:
b75ad4cd 2050 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 2051}
2052
24ac23ab
TM		 2053static void nfs4_open_done(struct rpc_task *task, void *calldata)
2054{
2055 struct nfs4_opendata *data = calldata;
1da177e4 2056
24ac23ab 2057 data->rpc_status = task->tk_status;
d898528c 2058
14516c3a
TM		 2059 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
2060 return;
d898528c 2061
24ac23ab 2062 if (task->tk_status == 0) {
807d66d8
TM		 2063 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2064 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 2065 case S_IFREG:
2066 break;
2067 case S_IFLNK:
24ac23ab 2068 data->rpc_status = -ELOOP;
6f926b5b
TM		 2069 break;
2070 case S_IFDIR:
24ac23ab 2071 data->rpc_status = -EISDIR;
6f926b5b
TM		 2072 break;
2073 default:
24ac23ab 2074 data->rpc_status = -ENOTDIR;
807d66d8 2075 }
6f926b5b 2076 }
26e976a8 2077 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 2078 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2079 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 2080 }
3e309914 2081 data->rpc_done = 1;
24ac23ab 2082}
6f926b5b 2083
24ac23ab
TM		 2084static void nfs4_open_release(void *calldata)
2085{
2086 struct nfs4_opendata *data = calldata;
2087 struct nfs4_state *state = NULL;
2088
2089 /* If this request hasn't been cancelled, do nothing */
2090 if (data->cancelled == 0)
2091 goto out_free;
2092 /* In case of error, no cleanup! */
3e309914 2093 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 2094 goto out_free;
2095 /* In case we need an open_confirm, no cleanup! */
2096 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2097 goto out_free;
24ac23ab 2098 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2099 if (!IS_ERR(state))
643168c2 2100 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 2101out_free:
c6d00e63 2102 nfs4_opendata_put(data);
24ac23ab
TM		 2103}
2104
2105static const struct rpc_call_ops nfs4_open_ops = {
2106 .rpc_call_prepare = nfs4_open_prepare,
2107 .rpc_call_done = nfs4_open_done,
2108 .rpc_release = nfs4_open_release,
2109};
2110
b257957e 2111static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab 2112{
2b0143b5 2113 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 2114 struct nfs_server *server = NFS_SERVER(dir);
2115 struct nfs_openargs *o_arg = &data->o_arg;
2116 struct nfs_openres *o_res = &data->o_res;
2117 struct rpc_task *task;
5138fde0
TM		 2118 struct rpc_message msg = {
2119 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2120 .rpc_argp = o_arg,
2121 .rpc_resp = o_res,
2122 .rpc_cred = data->owner->so_cred,
2123 };
c970aa85
TM		 2124 struct rpc_task_setup task_setup_data = {
2125 .rpc_client = server->client,
5138fde0 2126 .rpc_message = &msg,
c970aa85
TM		 2127 .callback_ops = &nfs4_open_ops,
2128 .callback_data = data,
101070ca 2129 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2130 .flags = RPC_TASK_ASYNC,
2131 };
24ac23ab
TM		 2132 int status;
2133
a9c92d6b 2134 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 2135 kref_get(&data->kref);
3e309914
TM		 2136 data->rpc_done = 0;
2137 data->rpc_status = 0;
2ced46c2 2138 data->cancelled = 0;
bdeca1b7
TM		 2139 data->is_recover = 0;
2140 if (isrecover) {
8fe72bac 2141 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 2142 data->is_recover = 1;
2143 }
c970aa85 2144 task = rpc_run_task(&task_setup_data);
b257957e
AB		 2145 if (IS_ERR(task))
2146 return PTR_ERR(task);
2147 status = nfs4_wait_for_completion_rpc_task(task);
2148 if (status != 0) {
2149 data->cancelled = 1;
2150 smp_wmb();
2151 } else
2152 status = data->rpc_status;
2153 rpc_put_task(task);
2154
2155 return status;
2156}
2157
2158static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2159{
2b0143b5 2160 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2161 struct nfs_openres *o_res = &data->o_res;
2162 int status;
2163
2164 status = nfs4_run_open_task(data, 1);
2165 if (status != 0 || !data->rpc_done)
2166 return status;
2167
6926afd1
TM		 2168 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2169
b257957e
AB		 2170 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2171 status = _nfs4_proc_open_confirm(data);
2172 if (status != 0)
2173 return status;
2174 }
2175
2176 return status;
2177}
2178
f3792d63
TM		 2179/*
2180 * Additional permission checks in order to distinguish between an
2181 * open for read, and an open for execute. This works around the
2182 * fact that NFSv4 OPEN treats read and execute permissions as being
2183 * the same.
2184 * Note that in the non-execute case, we want to turn off permission
2185 * checking if we just created a new file (POSIX open() semantics).
2186 */
6168f62c
WAA		 2187static int nfs4_opendata_access(struct rpc_cred *cred,
2188 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2189 struct nfs4_state *state, fmode_t fmode,
2190 int openflags)
6168f62c
WAA		 2191{
2192 struct nfs_access_entry cache;
2193 u32 mask;
2194
2195 /* access call failed or for some reason the server doesn't
2196 * support any access modes -- defer access call until later */
2197 if (opendata->o_res.access_supported == 0)
2198 return 0;
2199
2200 mask = 0;
f3792d63
TM		 2201 /*
2202 * Use openflags to check for exec, because fmode won't
2203 * always have FMODE_EXEC set when file open for exec.
2204 */
f8d9a897
WAA		 2205 if (openflags & __FMODE_EXEC) {
2206 /* ONLY check for exec rights */
2207 mask = MAY_EXEC;
f3792d63 2208 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2209 mask = MAY_READ;
6168f62c
WAA		 2210
2211 cache.cred = cred;
2212 cache.jiffies = jiffies;
2213 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2214 nfs_access_add_cache(state->inode, &cache);
2215
bbd3a8ee 2216 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2217 return 0;
2218
2219 /* even though OPEN succeeded, access is denied. Close the file */
2220 nfs4_close_state(state, fmode);
998f40b5 2221 return -EACCES;
6168f62c
WAA		 2222}
2223
b257957e
AB		 2224/*
2225 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2226 */
2227static int _nfs4_proc_open(struct nfs4_opendata *data)
2228{
2b0143b5 2229 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2230 struct nfs_server *server = NFS_SERVER(dir);
2231 struct nfs_openargs *o_arg = &data->o_arg;
2232 struct nfs_openres *o_res = &data->o_res;
2233 int status;
2234
2235 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2236 if (!data->rpc_done)
2237 return status;
2238 if (status != 0) {
2239 if (status == -NFS4ERR_BADNAME &&
2240 !(o_arg->open_flags & O_CREAT))
2241 return -ENOENT;
24ac23ab 2242 return status;
08ef7bd3 2243 }
24ac23ab 2244
6926afd1
TM		 2245 nfs_fattr_map_and_free_names(server, &data->f_attr);
2246
5bc2afc2 2247 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2248 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2249 if (o_arg->open_flags & O_EXCL)
2250 data->file_created = 1;
2251 else if (o_res->cinfo.before != o_res->cinfo.after)
2252 data->file_created = 1;
2253 }
0df5dd4a
TM		 2254 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2255 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2256 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2257 status = _nfs4_proc_open_confirm(data);
1da177e4 2258 if (status != 0)
24ac23ab 2259 return status;
1da177e4
LT		 2260 }
2261 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2262 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2263 return 0;
1da177e4
LT		 2264}
2265
d83217c1
AA		 2266static int nfs4_recover_expired_lease(struct nfs_server *server)
2267{
2268 return nfs4_client_recover_expired_lease(server->nfs_client);
2269}
2270
1da177e4
LT		 2271/*
2272 * OPEN_EXPIRED:
2273 * reclaim state on the server after a network partition.
2274 * Assumes caller holds the appropriate lock
2275 */
539cd03a 2276static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2277{
e56e0b78 2278 struct nfs4_opendata *opendata;
864472e9 2279 int ret;
1da177e4 2280
4a1c0893 2281 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2282 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2283 if (IS_ERR(opendata))
2284 return PTR_ERR(opendata);
864472e9 2285 ret = nfs4_open_recover(opendata, state);
35d05778 2286 if (ret == -ESTALE)
3d4ff43d 2287 d_drop(ctx->dentry);
c6d00e63 2288 nfs4_opendata_put(opendata);
864472e9 2289 return ret;
1da177e4
LT		 2290}
2291
a9ed2e25 2292static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2293{
539cd03a 2294 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2295 struct nfs4_exception exception = { };
2296 int err;
2297
2298 do {
539cd03a 2299 err = _nfs4_open_expired(ctx, state);
42113a75 2300 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2301 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2302 continue;
a9ed2e25
TM		 2303 switch (err) {
2304 default:
2305 goto out;
2306 case -NFS4ERR_GRACE:
2307 case -NFS4ERR_DELAY:
2308 nfs4_handle_exception(server, err, &exception);
2309 err = 0;
2310 }
202b50dc 2311 } while (exception.retry);
a9ed2e25 2312out:
202b50dc
TM		 2313 return err;
2314}
2315
1da177e4
LT		 2316static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2317{
1da177e4 2318 struct nfs_open_context *ctx;
864472e9 2319 int ret;
1da177e4 2320
864472e9
TM		 2321 ctx = nfs4_state_find_open_context(state);
2322 if (IS_ERR(ctx))
91876b13 2323 return -EAGAIN;
539cd03a 2324 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2325 put_nfs_open_context(ctx);
2326 return ret;
1da177e4
LT		 2327}
2328
4dfd4f7a
TM		 2329static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2330{
2331 nfs_remove_bad_delegation(state->inode);
2332 write_seqlock(&state->seqlock);
2333 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2334 write_sequnlock(&state->seqlock);
2335 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2336}
2337
2338static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2339{
2340 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2341 nfs_finish_clear_delegation_stateid(state);
2342}
2343
2344static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2345{
2346 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2347 nfs40_clear_delegation_stateid(state);
2348 return nfs4_open_expired(sp, state);
2349}
2350
f062eb6c 2351#if defined(CONFIG_NFS_V4_1)
0c116cad 2352static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2353{
f062eb6c 2354 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2355 nfs4_stateid stateid;
ab7cb0df 2356 struct nfs_delegation *delegation;
0c116cad
TM		 2357 struct rpc_cred *cred;
2358 int status;
3e60ffdd 2359
ab7cb0df
TM		 2360 /* Get the delegation credential for use by test/free_stateid */
2361 rcu_read_lock();
2362 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2363 if (delegation == NULL) {
ab7cb0df 2364 rcu_read_unlock();
0c116cad
TM		 2365 return;
2366 }
2367
2368 nfs4_stateid_copy(&stateid, &delegation->stateid);
2369 cred = get_rpccred(delegation->cred);
2370 rcu_read_unlock();
2371 status = nfs41_test_stateid(server, &stateid, cred);
2372 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df 2373
3e60ffdd
CL		 2374 if (status != NFS_OK) {
2375 /* Free the stateid unless the server explicitly
2376 * informs us the stateid is unrecognized. */
2377 if (status != -NFS4ERR_BAD_STATEID)
0c116cad
TM		 2378 nfs41_free_stateid(server, &stateid, cred);
2379 nfs_finish_clear_delegation_stateid(state);
3e60ffdd 2380 }
ab7cb0df 2381
0c116cad 2382 put_rpccred(cred);
3e60ffdd
CL		 2383}
2384
2385/**
2386 * nfs41_check_open_stateid - possibly free an open stateid
2387 *
2388 * @state: NFSv4 state for an inode
2389 *
2390 * Returns NFS_OK if recovery for this stateid is now finished.
2391 * Otherwise a negative NFS4ERR value is returned.
2392 */
2393static int nfs41_check_open_stateid(struct nfs4_state *state)
2394{
2395 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2396 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2397 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2398 int status;
2399
2400 /* If a state reset has been done, test_stateid is unneeded */
2401 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2402 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2403 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2404 return -NFS4ERR_BAD_STATEID;
2405
ab7cb0df 2406 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2407 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2408 if (status != NFS_OK) {
2409 /* Free the stateid unless the server explicitly
2410 * informs us the stateid is unrecognized. */
2411 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2412 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2413
2414 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2415 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2416 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2417 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2418 }
2419 return status;
2420}
2421
2422static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2423{
eb64cf96 2424 int status;
b01dd1d8 2425
0c116cad 2426 nfs41_check_delegation_stateid(state);
3e60ffdd 2427 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2428 if (status != NFS_OK)
2429 status = nfs4_open_expired(sp, state);
2430 return status;
f062eb6c
BS		 2431}
2432#endif
2433
aa53ed54
JL		 2434/*
2435 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2436 * fields corresponding to attributes that were used to store the verifier.
2437 * Make sure we clobber those fields in the later setattr call
2438 */
5334c5bd
KM		 2439static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2440 struct iattr *sattr, struct nfs4_label **label)
aa53ed54 2441{
5334c5bd
KM		 2442 const u32 *attrset = opendata->o_res.attrset;
2443
2444 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
aa53ed54
JL		 2445 !(sattr->ia_valid & ATTR_ATIME_SET))
2446 sattr->ia_valid |= ATTR_ATIME;
2447
5334c5bd 2448 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
aa53ed54
JL		 2449 !(sattr->ia_valid & ATTR_MTIME_SET))
2450 sattr->ia_valid |= ATTR_MTIME;
5334c5bd
KM		 2451
2452 /* Except MODE, it seems harmless of setting twice. */
2453 if ((attrset[1] & FATTR4_WORD1_MODE))
2454 sattr->ia_valid &= ~ATTR_MODE;
2455
2456 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2457 *label = NULL;
aa53ed54
JL		 2458}
2459
c21443c2
TM		 2460static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2461 fmode_t fmode,
2462 int flags,
3efb9722 2463 struct nfs_open_context *ctx)
c21443c2
TM		 2464{
2465 struct nfs4_state_owner *sp = opendata->owner;
2466 struct nfs_server *server = sp->so_server;
275bb307 2467 struct dentry *dentry;
c21443c2
TM		 2468 struct nfs4_state *state;
2469 unsigned int seq;
2470 int ret;
2471
2472 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2473
2474 ret = _nfs4_proc_open(opendata);
dca78001 2475 if (ret != 0)
c21443c2
TM		 2476 goto out;
2477
2478 state = nfs4_opendata_to_nfs4_state(opendata);
2479 ret = PTR_ERR(state);
2480 if (IS_ERR(state))
2481 goto out;
2482 if (server->caps & NFS_CAP_POSIX_LOCK)
2483 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2484
275bb307 2485 dentry = opendata->dentry;
2b0143b5 2486 if (d_really_is_negative(dentry)) {
668d0cd5 2487 struct dentry *alias;
275bb307 2488 d_drop(dentry);
668d0cd5
AV		 2489 alias = d_exact_alias(dentry, state->inode);
2490 if (!alias)
2491 alias = d_splice_alias(igrab(state->inode), dentry);
2492 /* d_splice_alias() can't fail here - it's a non-directory */
2493 if (alias) {
275bb307 2494 dput(ctx->dentry);
668d0cd5 2495 ctx->dentry = dentry = alias;
275bb307
TM		 2496 }
2497 nfs_set_verifier(dentry,
2b0143b5 2498 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2499 }
2500
c21443c2
TM		 2501 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2502 if (ret != 0)
2503 goto out;
2504
3efb9722 2505 ctx->state = state;
2b0143b5 2506 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2507 nfs_inode_attach_open_context(ctx);
2508 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2509 nfs4_schedule_stateid_recovery(server, state);
2510 }
c21443c2
TM		 2511out:
2512 return ret;
2513}
2514
1da177e4 2515/*
24ac23ab 2516 * Returns a referenced nfs4_state
1da177e4 2517 */
82be417a 2518static int _nfs4_do_open(struct inode *dir,
4197a055 2519 struct nfs_open_context *ctx,
82be417a
AA		 2520 int flags,
2521 struct iattr *sattr,
5bc2afc2
TM		 2522 struct nfs4_label *label,
2523 int *opened)
1da177e4
LT		 2524{
2525 struct nfs4_state_owner *sp;
2526 struct nfs4_state *state = NULL;
2527 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2528 struct nfs4_opendata *opendata;
4197a055
TM		 2529 struct dentry *dentry = ctx->dentry;
2530 struct rpc_cred *cred = ctx->cred;
2531 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2532 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2533 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2534 struct nfs4_label *olabel = NULL;
aac00a8d 2535 int status;
1da177e4
LT		 2536
2537 /* Protect against reboot recovery conflicts */
1da177e4 2538 status = -ENOMEM;
d1e284d5
TM		 2539 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2540 if (sp == NULL) {
1da177e4
LT		 2541 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2542 goto out_err;
2543 }
58d9714a
TM		 2544 status = nfs4_recover_expired_lease(server);
2545 if (status != 0)
b4454fe1 2546 goto err_put_state_owner;
2b0143b5
DH		 2547 if (d_really_is_positive(dentry))
2548 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2549 status = -ENOMEM;
2b0143b5 2550 if (d_really_is_positive(dentry))
49f9a0fa 2551 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2552 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2553 label, claim, GFP_KERNEL);
e56e0b78 2554 if (opendata == NULL)
95d35cb4 2555 goto err_put_state_owner;
1da177e4 2556
14c43f76
DQ		 2557 if (label) {
2558 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2559 if (IS_ERR(olabel)) {
2560 status = PTR_ERR(olabel);
2561 goto err_opendata_put;
2562 }
2563 }
2564
e911b815
TM		 2565 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2566 if (!opendata->f_attr.mdsthreshold) {
2567 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2568 if (!opendata->f_attr.mdsthreshold)
2569 goto err_free_label;
2570 }
1549210f 2571 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2572 }
2b0143b5
DH		 2573 if (d_really_is_positive(dentry))
2574 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2575
3efb9722 2576 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2577 if (status != 0)
14c43f76 2578 goto err_free_label;
3efb9722 2579 state = ctx->state;
6168f62c 2580
efcbc04e 2581 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 2582 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
5334c5bd 2583 nfs4_exclusive_attrset(opendata, sattr, &label);
a1d1c4f1
TM		 2584 /*
2585 * send create attributes which was not set by open
2586 * with an extra setattr.
2587 */
2588 if (sattr->ia_valid & NFS4_VALID_ATTRS) {
2589 nfs_fattr_init(opendata->o_res.f_attr);
2590 status = nfs4_do_setattr(state->inode, cred,
2591 opendata->o_res.f_attr, sattr,
2592 state, label, olabel);
2593 if (status == 0) {
2594 nfs_setattr_update_inode(state->inode, sattr,
2595 opendata->o_res.f_attr);
2596 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2597 }
1775fd3e 2598 }
0ab64e0e 2599 }
c5c3fb5f 2600 if (opened && opendata->file_created)
5bc2afc2 2601 *opened |= FILE_CREATED;
82be417a 2602
e911b815 2603 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2604 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2605 opendata->f_attr.mdsthreshold = NULL;
2606 }
82be417a 2607
14c43f76
DQ		 2608 nfs4_label_free(olabel);
2609
c6d00e63 2610 nfs4_opendata_put(opendata);
1da177e4 2611 nfs4_put_state_owner(sp);
1da177e4 2612 return 0;
14c43f76
DQ		 2613err_free_label:
2614 nfs4_label_free(olabel);
c6d00e63
TM		 2615err_opendata_put:
2616 nfs4_opendata_put(opendata);
e56e0b78
TM		 2617err_put_state_owner:
2618 nfs4_put_state_owner(sp);
1da177e4 2619out_err:
1da177e4
LT		 2620 return status;
2621}
2622
2623
82be417a 2624static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2625 struct nfs_open_context *ctx,
82be417a
AA		 2626 int flags,
2627 struct iattr *sattr,
5bc2afc2
TM		 2628 struct nfs4_label *label,
2629 int *opened)
1da177e4 2630{
49f9a0fa 2631 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2632 struct nfs4_exception exception = { };
2633 struct nfs4_state *res;
2634 int status;
2635
2636 do {
5bc2afc2 2637 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2638 res = ctx->state;
42113a75 2639 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2640 if (status == 0)
2641 break;
2642 /* NOTE: BAD_SEQID means the server and client disagree about the
2643 * book-keeping w.r.t. state-changing operations
2644 * (OPEN/CLOSE/LOCK/LOCKU...)
2645 * It is actually a sign of a bug on the client or on the server.
2646 *
2647 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2648 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2649 * have unhashed the old state_owner for us, and that we can
2650 * therefore safely retry using a new one. We should still warn
2651 * the user though...
2652 */
2653 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2654 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2655 " returned a bad sequence-id error!\n",
2656 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2657 exception.retry = 1;
2658 continue;
2659 }
550f5747
TM		 2660 /*
2661 * BAD_STATEID on OPEN means that the server cancelled our
2662 * state before it received the OPEN_CONFIRM.
2663 * Recover by retrying the request as per the discussion
2664 * on Page 181 of RFC3530.
2665 */
2666 if (status == -NFS4ERR_BAD_STATEID) {
2667 exception.retry = 1;
2668 continue;
2669 }
aac00a8d
TM		 2670 if (status == -EAGAIN) {
2671 /* We must have found a delegation */
2672 exception.retry = 1;
2673 continue;
2674 }
49f9a0fa
TM		 2675 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2676 continue;
2677 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2678 status, &exception));
2679 } while (exception.retry);
2680 return res;
2681}
2682
8487c479
TM		 2683static int _nfs4_do_setattr(struct inode *inode,
2684 struct nfs_setattrargs *arg,
2685 struct nfs_setattrres *res,
2686 struct rpc_cred *cred,
2687 struct nfs4_state *state)
1da177e4 2688{
3e4f6290 2689 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2690 struct rpc_message msg = {
659bfcd6 2691 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
8487c479
TM		 2692 .rpc_argp = arg,
2693 .rpc_resp = res,
659bfcd6 2694 .rpc_cred = cred,
1da177e4 2695 };
abf4e13c 2696 struct rpc_cred *delegation_cred = NULL;
26e976a8 2697 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2698 fmode_t fmode;
2699 bool truncate;
65e4308d 2700 int status;
1da177e4 2701
8487c479 2702 nfs_fattr_init(res->fattr);
1da177e4 2703
ee3ae84e 2704 /* Servers should only apply open mode checks for file size changes */
8487c479 2705 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
ee3ae84e
TM		 2706 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2707
8487c479 2708 if (nfs4_copy_delegation_stateid(inode, fmode, &arg->stateid, &delegation_cred)) {
ee3ae84e 2709 /* Use that stateid */
0418dae1 2710 } else if (truncate && state != NULL) {
2a369153
TM		 2711 struct nfs_lockowner lockowner = {
2712 .l_owner = current->files,
2713 .l_pid = current->tgid,
2714 };
0418dae1
TM		 2715 if (!nfs4_valid_open_stateid(state))
2716 return -EBADF;
abf4e13c 2717 if (nfs4_select_rw_stateid(state, FMODE_WRITE, &lockowner,
8487c479 2718 &arg->stateid, &delegation_cred) == -EIO)
0418dae1 2719 return -EBADF;
08e9eac4 2720 } else
8487c479 2721 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
abf4e13c
TM		 2722 if (delegation_cred)
2723 msg.rpc_cred = delegation_cred;
1da177e4 2724
8487c479 2725 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
abf4e13c
TM		 2726
2727 put_rpccred(delegation_cred);
26e976a8
TM		 2728 if (status == 0 && state != NULL)
2729 renew_lease(server, timestamp);
8487c479 2730 trace_nfs4_setattr(inode, &arg->stateid, status);
65e4308d 2731 return status;
1da177e4
LT		 2732}
2733
659bfcd6
TM		 2734static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2735 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2736 struct nfs4_state *state, struct nfs4_label *ilabel,
2737 struct nfs4_label *olabel)
1da177e4 2738{
3e4f6290 2739 struct nfs_server *server = NFS_SERVER(inode);
8487c479
TM		 2740 struct nfs_setattrargs arg = {
2741 .fh = NFS_FH(inode),
2742 .iap = sattr,
2743 .server = server,
2744 .bitmask = server->attr_bitmask,
2745 .label = ilabel,
2746 };
2747 struct nfs_setattrres res = {
2748 .fattr = fattr,
2749 .label = olabel,
2750 .server = server,
2751 };
a1d0b5ee
TM		 2752 struct nfs4_exception exception = {
2753 .state = state,
3114ea7a 2754 .inode = inode,
8487c479 2755 .stateid = &arg.stateid,
a1d0b5ee 2756 };
1da177e4 2757 int err;
8487c479
TM		 2758
2759 arg.bitmask = nfs4_bitmask(server, ilabel);
2760 if (ilabel)
2761 arg.bitmask = nfs4_bitmask(server, olabel);
2762
1da177e4 2763 do {
8487c479 2764 err = _nfs4_do_setattr(inode, &arg, &res, cred, state);
451146be
TM		 2765 switch (err) {
2766 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2767 if (!(sattr->ia_valid & ATTR_SIZE)) {
2768 pr_warn_once("NFSv4: server %s is incorrectly "
2769 "applying open mode checks to "
2770 "a SETATTR that is not "
2771 "changing file size.\n",
2772 server->nfs_client->cl_hostname);
2773 }
451146be
TM		 2774 if (state && !(state->state & FMODE_WRITE)) {
2775 err = -EBADF;
2776 if (sattr->ia_valid & ATTR_OPEN)
2777 err = -EACCES;
2778 goto out;
2779 }
2780 }
2781 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2782 } while (exception.retry);
451146be 2783out:
1da177e4
LT		 2784 return err;
2785}
2786
500d701f
PT		 2787static bool
2788nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
2789{
2790 if (inode == NULL || !nfs_have_layout(inode))
2791 return false;
2792
2793 return pnfs_wait_on_layoutreturn(inode, task);
2794}
2795
1da177e4
LT		 2796struct nfs4_closedata {
2797 struct inode *inode;
2798 struct nfs4_state *state;
2799 struct nfs_closeargs arg;
2800 struct nfs_closeres res;
516a6af6 2801 struct nfs_fattr fattr;
26e976a8 2802 unsigned long timestamp;
f7e8917a
FI		 2803 bool roc;
2804 u32 roc_barrier;
1da177e4
LT		 2805};
2806
963d8fe5 2807static void nfs4_free_closedata(void *data)
9512135d 2808{
963d8fe5
TM		 2809 struct nfs4_closedata *calldata = data;
2810 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2811 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2812
f7e8917a
FI		 2813 if (calldata->roc)
2814 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2815 nfs4_put_open_state(calldata->state);
2816 nfs_free_seqid(calldata->arg.seqid);
9512135d 2817 nfs4_put_state_owner(sp);
322b2b90 2818 nfs_sb_deactive(sb);
9512135d
TM		 2819 kfree(calldata);
2820}
2821
963d8fe5 2822static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2823{
963d8fe5 2824 struct nfs4_closedata *calldata = data;
1da177e4 2825 struct nfs4_state *state = calldata->state;
1da177e4 2826 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2827 nfs4_stateid *res_stateid = NULL;
1da177e4 2828
a3ca5651 2829 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2830 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2831 return;
42113a75 2832 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2833 /* hmm. we are done with the inode, and in the process of freeing
2834 * the state_owner. we keep this around to process errors
2835 */
1da177e4
LT		 2836 switch (task->tk_status) {
2837 case 0:
412f6c4c 2838 res_stateid = &calldata->res.stateid;
3c13cb5b 2839 if (calldata->roc)
f7e8917a
FI		 2840 pnfs_roc_set_barrier(state->inode,
2841 calldata->roc_barrier);
26e976a8 2842 renew_lease(server, calldata->timestamp);
412f6c4c 2843 break;
69794ad7 2844 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2845 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2846 case -NFS4ERR_OLD_STATEID:
2847 case -NFS4ERR_BAD_STATEID:
1da177e4 2848 case -NFS4ERR_EXPIRED:
566fcec6 2849 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 2850 &state->open_stateid)) {
566fcec6
TM		 2851 rpc_restart_call_prepare(task);
2852 goto out_release;
2853 }
dc0b027d 2854 if (calldata->arg.fmode == 0)
9e33bed5 2855 break;
1da177e4 2856 default:
8478eaa1 2857 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 2858 rpc_restart_call_prepare(task);
69794ad7
TM		 2859 goto out_release;
2860 }
1da177e4 2861 }
4a1e2feb
TM		 2862 nfs_clear_open_stateid(state, &calldata->arg.stateid,
2863 res_stateid, calldata->arg.fmode);
69794ad7 2864out_release:
72211dbe 2865 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2866 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2867 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2868}
2869
4ce70ada 2870static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2871{
4ce70ada 2872 struct nfs4_closedata *calldata = data;
9512135d 2873 struct nfs4_state *state = calldata->state;
7fdab069 2874 struct inode *inode = calldata->inode;
aee7af35 2875 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2876 int call_close = 0;
9512135d 2877
a3ca5651 2878 dprintk("%s: begin!\n", __func__);
963d8fe5 2879 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2880 goto out_wait;
003707c7 2881
88069f77 2882 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2883 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2884 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2885 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2886 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 2887 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 2888 /* Calculate the change in open mode */
cd9288ff 2889 calldata->arg.fmode = 0;
e7616923 2890 if (state->n_rdwr == 0) {
cd9288ff
TM		 2891 if (state->n_rdonly == 0)
2892 call_close |= is_rdonly;
2893 else if (is_rdonly)
2894 calldata->arg.fmode |= FMODE_READ;
2895 if (state->n_wronly == 0)
2896 call_close |= is_wronly;
2897 else if (is_wronly)
2898 calldata->arg.fmode |= FMODE_WRITE;
e547f262
TM		 2899 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
2900 call_close |= is_rdwr;
cd9288ff
TM		 2901 } else if (is_rdwr)
2902 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2903
5d422301
TM		 2904 if (!nfs4_valid_open_stateid(state))
2905 call_close = 0;
4cecb76f 2906 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2907
2908 if (!call_close) {
963d8fe5 2909 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2910 goto out_no_action;
9512135d 2911 }
88069f77 2912
500d701f
PT		 2913 if (nfs4_wait_on_layoutreturn(inode, task)) {
2914 nfs_release_seqid(calldata->arg.seqid);
2915 goto out_wait;
2916 }
2917
3c13cb5b 2918 if (calldata->arg.fmode == 0)
88069f77 2919 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3c13cb5b
TM		 2920 if (calldata->roc)
2921 pnfs_roc_get_barrier(inode, &calldata->roc_barrier);
2922
6ae37339
TM		 2923 calldata->arg.share_access =
2924 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2925 calldata->arg.fmode, 0);
88069f77 2926
516a6af6 2927 nfs_fattr_init(calldata->res.fattr);
26e976a8 2928 calldata->timestamp = jiffies;
7fdab069 2929 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2930 &calldata->arg.seq_args,
2931 &calldata->res.seq_res,
2240a9e2
TM		 2932 task) != 0)
2933 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2934 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2935 return;
2936out_no_action:
2937 task->tk_action = NULL;
2938out_wait:
2939 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2940}
2941
963d8fe5 2942static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2943 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2944 .rpc_call_done = nfs4_close_done,
2945 .rpc_release = nfs4_free_closedata,
2946};
2947
fe08c546
PT		 2948static bool nfs4_roc(struct inode *inode)
2949{
40dd4b7a 2950 if (!nfs_have_layout(inode))
fe08c546 2951 return false;
fe08c546
PT		 2952 return pnfs_roc(inode);
2953}
2954
1da177e4
LT		 2955/*
2956 * It is possible for data to be read/written from a mem-mapped file
2957 * after the sys_close call (which hits the vfs layer as a flush).
2958 * This means that we can't safely call nfsv4 close on a file until
2959 * the inode is cleared. This in turn means that we are not good
2960 * NFSv4 citizens - we do not indicate to the server to update the file's
2961 * share state even when we are done with one of the three share
2962 * stateid's in the inode.
2963 *
2964 * NOTE: Caller must be holding the sp->so_owner semaphore!
2965 */
1f7977c1 2966int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2967{
4a35bd41 2968 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 2969 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 2970 struct nfs4_closedata *calldata;
b39e625b
TM		 2971 struct nfs4_state_owner *sp = state->owner;
2972 struct rpc_task *task;
5138fde0
TM		 2973 struct rpc_message msg = {
2974 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2975 .rpc_cred = state->owner->so_cred,
2976 };
c970aa85
TM		 2977 struct rpc_task_setup task_setup_data = {
2978 .rpc_client = server->client,
5138fde0 2979 .rpc_message = &msg,
c970aa85 2980 .callback_ops = &nfs4_close_ops,
101070ca 2981 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2982 .flags = RPC_TASK_ASYNC,
2983 };
9512135d 2984 int status = -ENOMEM;
1da177e4 2985
fa940720
WAA		 2986 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2987 &task_setup_data.rpc_client, &msg);
2988
8535b2be 2989 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2990 if (calldata == NULL)
9512135d 2991 goto out;
a9c92d6b 2992 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2993 calldata->inode = state->inode;
1da177e4 2994 calldata->state = state;
4a35bd41 2995 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 2996 /* Serialization for the sequence id */
63f5f796
TM		 2997 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2998 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 2999 if (IS_ERR(calldata->arg.seqid))
9512135d 3000 goto out_free_calldata;
dc0b027d 3001 calldata->arg.fmode = 0;
a65318bf 3002 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 3003 calldata->res.fattr = &calldata->fattr;
c1d51931 3004 calldata->res.seqid = calldata->arg.seqid;
516a6af6 3005 calldata->res.server = server;
fe08c546 3006 calldata->roc = nfs4_roc(state->inode);
643168c2 3007 nfs_sb_active(calldata->inode->i_sb);
9512135d 3008
1174dd1f
TM		 3009 msg.rpc_argp = &calldata->arg;
3010 msg.rpc_resp = &calldata->res;
c970aa85
TM		 3011 task_setup_data.callback_data = calldata;
3012 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 3013 if (IS_ERR(task))
3014 return PTR_ERR(task);
a49c3c77
TM		 3015 status = 0;
3016 if (wait)
3017 status = rpc_wait_for_completion_task(task);
b39e625b 3018 rpc_put_task(task);
a49c3c77 3019 return status;
9512135d
TM		 3020out_free_calldata:
3021 kfree(calldata);
3022out:
b39e625b
TM		 3023 nfs4_put_open_state(state);
3024 nfs4_put_state_owner(sp);
9512135d 3025 return status;
1da177e4
LT		 3026}
3027
2b484297 3028static struct inode *
5bc2afc2
TM		 3029nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3030 int open_flags, struct iattr *attr, int *opened)
1da177e4 3031{
1da177e4 3032 struct nfs4_state *state;
aa9c2669
DQ		 3033 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3034
3035 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 3036
565277f6 3037 /* Protect against concurrent sillydeletes */
5bc2afc2 3038 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 3039
3040 nfs4_label_release_security(label);
3041
f46e0bd3
TM		 3042 if (IS_ERR(state))
3043 return ERR_CAST(state);
275bb307 3044 return state->inode;
1da177e4
LT		 3045}
3046
1185a552 3047static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 3048{
3049 if (ctx->state == NULL)
3050 return;
3051 if (is_sync)
643168c2 3052 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 3053 else
643168c2 3054 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 3055}
1da177e4 3056
b944dba3
TM		 3057#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3058#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 3059#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 3060
1da177e4
LT		 3061static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3062{
8c61282f 3063 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 3064 struct nfs4_server_caps_arg args = {
3065 .fhandle = fhandle,
8c61282f 3066 .bitmask = bitmask,
43652ad5 3067 };
1da177e4
LT		 3068 struct nfs4_server_caps_res res = {};
3069 struct rpc_message msg = {
3070 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 3071 .rpc_argp = &args,
1da177e4
LT		 3072 .rpc_resp = &res,
3073 };
3074 int status;
3075
8c61282f
KM		 3076 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3077 FATTR4_WORD0_FH_EXPIRE_TYPE |
3078 FATTR4_WORD0_LINK_SUPPORT |
3079 FATTR4_WORD0_SYMLINK_SUPPORT |
3080 FATTR4_WORD0_ACLSUPPORT;
3081 if (minorversion)
3082 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3083
7c513058 3084 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3085 if (status == 0) {
b944dba3 3086 /* Sanity check the server answers */
8c61282f 3087 switch (minorversion) {
b944dba3
TM		 3088 case 0:
3089 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3090 res.attr_bitmask[2] = 0;
3091 break;
3092 case 1:
3093 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3094 break;
3095 case 2:
3096 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3097 }
1da177e4 3098 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 3099 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3100 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3101 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3102 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 3103 NFS_CAP_CTIME|NFS_CAP_MTIME|
3104 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 3105 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3106 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 3107 server->caps |= NFS_CAP_ACLS;
3108 if (res.has_links != 0)
3109 server->caps |= NFS_CAP_HARDLINKS;
3110 if (res.has_symlinks != 0)
3111 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 3112 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3113 server->caps |= NFS_CAP_FILEID;
3114 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3115 server->caps |= NFS_CAP_MODE;
3116 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3117 server->caps |= NFS_CAP_NLINK;
3118 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3119 server->caps |= NFS_CAP_OWNER;
3120 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3121 server->caps |= NFS_CAP_OWNER_GROUP;
3122 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3123 server->caps |= NFS_CAP_ATIME;
3124 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3125 server->caps |= NFS_CAP_CTIME;
3126 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3127 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 3128#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3129 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3130 server->caps |= NFS_CAP_SECURITY_LABEL;
3131#endif
3132 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3133 sizeof(server->attr_bitmask));
b944dba3 3134 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 3135
a65318bf
TM		 3136 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3137 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3138 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 3139 server->cache_consistency_bitmask[2] = 0;
8c61282f
KM		 3140 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3141 sizeof(server->exclcreat_bitmask));
1da177e4 3142 server->acl_bitmask = res.acl_bitmask;
264e6351 3143 server->fh_expire_type = res.fh_expire_type;
1da177e4 3144 }
cccef3b9 3145
1da177e4
LT		 3146 return status;
3147}
3148
55a97593 3149int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 3150{
3151 struct nfs4_exception exception = { };
3152 int err;
3153 do {
3154 err = nfs4_handle_exception(server,
3155 _nfs4_server_capabilities(server, fhandle),
3156 &exception);
3157 } while (exception.retry);
3158 return err;
3159}
3160
3161static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3162 struct nfs_fsinfo *info)
3163{
aa9c2669 3164 u32 bitmask[3];
1da177e4 3165 struct nfs4_lookup_root_arg args = {
aa9c2669 3166 .bitmask = bitmask,
1da177e4
LT		 3167 };
3168 struct nfs4_lookup_res res = {
3169 .server = server,
0e574af1 3170 .fattr = info->fattr,
1da177e4
LT		 3171 .fh = fhandle,
3172 };
3173 struct rpc_message msg = {
3174 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3175 .rpc_argp = &args,
3176 .rpc_resp = &res,
3177 };
008f55d0 3178
aa9c2669
DQ		 3179 bitmask[0] = nfs4_fattr_bitmap[0];
3180 bitmask[1] = nfs4_fattr_bitmap[1];
3181 /*
3182 * Process the label in the upcoming getfattr
3183 */
3184 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3185
0e574af1 3186 nfs_fattr_init(info->fattr);
7c513058 3187 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3188}
3189
3190static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3191 struct nfs_fsinfo *info)
3192{
3193 struct nfs4_exception exception = { };
3194 int err;
3195 do {
fb8a5ba8 3196 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3197 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3198 switch (err) {
3199 case 0:
3200 case -NFS4ERR_WRONGSEC:
05e9cfb4 3201 goto out;
fb8a5ba8
BS		 3202 default:
3203 err = nfs4_handle_exception(server, err, &exception);
3204 }
1da177e4 3205 } while (exception.retry);
05e9cfb4 3206out:
1da177e4
LT		 3207 return err;
3208}
3209
8f70e95f
BS		 3210static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3211 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3212{
c2190661
TM		 3213 struct rpc_auth_create_args auth_args = {
3214 .pseudoflavor = flavor,
3215 };
8f70e95f
BS		 3216 struct rpc_auth *auth;
3217 int ret;
3218
c2190661 3219 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3220 if (IS_ERR(auth)) {
75bc8821 3221 ret = -EACCES;
8f70e95f
BS		 3222 goto out;
3223 }
3224 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3225out:
3226 return ret;
3227}
3228
9a744ba3
CL		 3229/*
3230 * Retry pseudoroot lookup with various security flavors. We do this when:
3231 *
3232 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3233 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3234 *
3235 * Returns zero on success, or a negative NFS4ERR value, or a
3236 * negative errno value.
3237 */
801a16dc 3238static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3239 struct nfs_fsinfo *info)
1da177e4 3240{
9a744ba3
CL		 3241 /* Per 3530bis 15.33.5 */
3242 static const rpc_authflavor_t flav_array[] = {
3243 RPC_AUTH_GSS_KRB5P,
3244 RPC_AUTH_GSS_KRB5I,
3245 RPC_AUTH_GSS_KRB5,
c4eafe11 3246 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3247 RPC_AUTH_NULL,
3248 };
3249 int status = -EPERM;
3250 size_t i;
6a1a1e34 3251
4d4b69dd
WAA		 3252 if (server->auth_info.flavor_len > 0) {
3253 /* try each flavor specified by user */
3254 for (i = 0; i < server->auth_info.flavor_len; i++) {
3255 status = nfs4_lookup_root_sec(server, fhandle, info,
3256 server->auth_info.flavors[i]);
3257 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3258 continue;
3259 break;
3260 }
3261 } else {
3262 /* no flavors specified by user, try default list */
3263 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3264 status = nfs4_lookup_root_sec(server, fhandle, info,
3265 flav_array[i]);
3266 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3267 continue;
3268 break;
3269 }
8f70e95f 3270 }
9a744ba3 3271
fb8a5ba8
BS		 3272 /*
3273 * -EACCESS could mean that the user doesn't have correct permissions
3274 * to access the mount. It could also mean that we tried to mount
3275 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3276 * existing mount programs don't handle -EACCES very well so it should
3277 * be mapped to -EPERM instead.
3278 */
3279 if (status == -EACCES)
3280 status = -EPERM;
801a16dc
BS		 3281 return status;
3282}
3283
2ed4b95b
CL		 3284static int nfs4_do_find_root_sec(struct nfs_server *server,
3285 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3286{
3287 int mv = server->nfs_client->cl_minorversion;
3288 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3289}
3290
3291/**
3292 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3293 * @server: initialized nfs_server handle
3294 * @fhandle: we fill in the pseudo-fs root file handle
3295 * @info: we fill in an FSINFO struct
5e6b1990 3296 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3297 *
3298 * Returns zero on success, or a negative errno.
801a16dc 3299 */
3028eb2b 3300int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3301 struct nfs_fsinfo *info,
3302 bool auth_probe)
801a16dc 3303{
c7757074 3304 int status = 0;
2ed4b95b 3305
c7757074 3306 if (!auth_probe)
5e6b1990 3307 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3308
3309 if (auth_probe || status == NFS4ERR_WRONGSEC)
2ed4b95b
CL		 3310 status = nfs4_do_find_root_sec(server, fhandle, info);
3311
1da177e4
LT		 3312 if (status == 0)
3313 status = nfs4_server_capabilities(server, fhandle);
3314 if (status == 0)
3315 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3316
c12e87f4 3317 return nfs4_map_errors(status);
1da177e4
LT		 3318}
3319
bae36241
BS		 3320static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3321 struct nfs_fsinfo *info)
3322{
3323 int error;
3324 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3325 struct nfs4_label *label = NULL;
bae36241
BS		 3326
3327 error = nfs4_server_capabilities(server, mntfh);
3328 if (error < 0) {
3329 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3330 return error;
3331 }
3332
14c43f76
DQ		 3333 label = nfs4_label_alloc(server, GFP_KERNEL);
3334 if (IS_ERR(label))
3335 return PTR_ERR(label);
3336
1775fd3e 3337 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3338 if (error < 0) {
3339 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3340 goto err_free_label;
bae36241
BS		 3341 }
3342
3343 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3344 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3345 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3346
14c43f76
DQ		 3347err_free_label:
3348 nfs4_label_free(label);
3349
bae36241
BS		 3350 return error;
3351}
3352
6b97fd3d
MN		 3353/*
3354 * Get locations and (maybe) other attributes of a referral.
3355 * Note that we'll actually follow the referral later when
3356 * we detect fsid mismatch in inode revalidation
3357 */
f05d147f
BS		 3358static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3359 const struct qstr *name, struct nfs_fattr *fattr,
3360 struct nfs_fh *fhandle)
6b97fd3d
MN		 3361{
3362 int status = -ENOMEM;
3363 struct page *page = NULL;
3364 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3365
3366 page = alloc_page(GFP_KERNEL);
3367 if (page == NULL)
3368 goto out;
3369 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3370 if (locations == NULL)
3371 goto out;
3372
f05d147f 3373 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3374 if (status != 0)
3375 goto out;
519ae255
CL		 3376
3377 /*
3378 * If the fsid didn't change, this is a migration event, not a
3379 * referral. Cause us to drop into the exception handler, which
3380 * will kick off migration recovery.
3381 */
6b97fd3d 3382 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3383 dprintk("%s: server did not return a different fsid for"
3384 " a referral at %s\n", __func__, name->name);
519ae255 3385 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3386 goto out;
3387 }
533eb461
AA		 3388 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3389 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3390
533eb461 3391 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3392 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3393 memset(fhandle, 0, sizeof(struct nfs_fh));
3394out:
3395 if (page)
3396 __free_page(page);
5d7ca35a 3397 kfree(locations);
6b97fd3d
MN		 3398 return status;
3399}
3400
1775fd3e
DQ		 3401static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3402 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3403{
3404 struct nfs4_getattr_arg args = {
3405 .fh = fhandle,
3406 .bitmask = server->attr_bitmask,
3407 };
3408 struct nfs4_getattr_res res = {
3409 .fattr = fattr,
1775fd3e 3410 .label = label,
1da177e4
LT		 3411 .server = server,
3412 };
3413 struct rpc_message msg = {
3414 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3415 .rpc_argp = &args,
3416 .rpc_resp = &res,
3417 };
aa9c2669
DQ		 3418
3419 args.bitmask = nfs4_bitmask(server, label);
3420
0e574af1 3421 nfs_fattr_init(fattr);
7c513058 3422 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3423}
3424
1775fd3e
DQ		 3425static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3426 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3427{
3428 struct nfs4_exception exception = { };
3429 int err;
3430 do {
b5f875a9
TM		 3431 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3432 trace_nfs4_getattr(server, fhandle, fattr, err);
3433 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3434 &exception);
3435 } while (exception.retry);
3436 return err;
3437}
3438
3439/*
3440 * The file is not closed if it is opened due to the a request to change
3441 * the size of the file. The open call will not be needed once the
3442 * VFS layer lookup-intents are implemented.
3443 *
3444 * Close is called when the inode is destroyed.
3445 * If we haven't opened the file for O_WRONLY, we
3446 * need to in the size_change case to obtain a stateid.
3447 *
3448 * Got race?
3449 * Because OPEN is always done by name in nfsv4, it is
3450 * possible that we opened a different file by the same
3451 * name. We can recognize this race condition, but we
3452 * can't do anything about it besides returning an error.
3453 *
3454 * This will be fixed with VFS changes (lookup-intent).
3455 */
3456static int
3457nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3458 struct iattr *sattr)
3459{
2b0143b5 3460 struct inode *inode = d_inode(dentry);
659bfcd6 3461 struct rpc_cred *cred = NULL;
d530838b 3462 struct nfs4_state *state = NULL;
14c43f76 3463 struct nfs4_label *label = NULL;
1da177e4
LT		 3464 int status;
3465
88ac815c
PT		 3466 if (pnfs_ld_layoutret_on_setattr(inode) &&
3467 sattr->ia_valid & ATTR_SIZE &&
3468 sattr->ia_size < i_size_read(inode))
24028672 3469 pnfs_commit_and_return_layout(inode);
8a1636c4 3470
0e574af1 3471 nfs_fattr_init(fattr);
1da177e4 3472
2669940d
AA		 3473 /* Deal with open(O_TRUNC) */
3474 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3475 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3476
3477 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3478 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3479 return 0;
3480
d530838b 3481 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3482 if (sattr->ia_valid & ATTR_FILE) {
3483 struct nfs_open_context *ctx;
3484
3485 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3486 if (ctx) {
3487 cred = ctx->cred;
3488 state = ctx->state;
3489 }
659bfcd6 3490 }
08e9eac4 3491
14c43f76
DQ		 3492 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3493 if (IS_ERR(label))
3494 return PTR_ERR(label);
3495
3496 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3497 if (status == 0) {
f044636d 3498 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3499 nfs_setsecurity(inode, fattr, label);
3500 }
14c43f76 3501 nfs4_label_free(label);
1da177e4
LT		 3502 return status;
3503}
3504
0c2e53f1
TM		 3505static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3506 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3507 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3508{
0c2e53f1 3509 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3510 int status;
3511 struct nfs4_lookup_arg args = {
3512 .bitmask = server->attr_bitmask,
0c2e53f1 3513 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3514 .name = name,
3515 };
3516 struct nfs4_lookup_res res = {
3517 .server = server,
3518 .fattr = fattr,
aa9c2669 3519 .label = label,
2b3de441
DH		 3520 .fh = fhandle,
3521 };
3522 struct rpc_message msg = {
3523 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3524 .rpc_argp = &args,
3525 .rpc_resp = &res,
3526 };
3527
aa9c2669
DQ		 3528 args.bitmask = nfs4_bitmask(server, label);
3529
2b3de441
DH		 3530 nfs_fattr_init(fattr);
3531
1da177e4 3532 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3533 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3534 dprintk("NFS reply lookup: %d\n", status);
3535 return status;
3536}
3537
72de53ec 3538static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3539{
7ebb9315 3540 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3541 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3542 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3543 fattr->nlink = 2;
3544}
3545
72de53ec
BS		 3546static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3547 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3548 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3549{
3550 struct nfs4_exception exception = { };
72de53ec 3551 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3552 int err;
3553 do {
1775fd3e 3554 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3555 trace_nfs4_lookup(dir, name, err);
72de53ec 3556 switch (err) {
08ef7bd3 3557 case -NFS4ERR_BADNAME:
72de53ec
BS		 3558 err = -ENOENT;
3559 goto out;
0c2e53f1 3560 case -NFS4ERR_MOVED:
f05d147f 3561 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3562 if (err == -NFS4ERR_MOVED)
3563 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3564 goto out;
0c2e53f1 3565 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3566 err = -EPERM;
3567 if (client != *clnt)
3568 goto out;
66b06860 3569 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3570 if (IS_ERR(client))
3571 return PTR_ERR(client);
3572
3573 exception.retry = 1;
3574 break;
3575 default:
3576 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3577 }
1da177e4 3578 } while (exception.retry);
72de53ec
BS		 3579
3580out:
3581 if (err == 0)
3582 *clnt = client;
3583 else if (client != *clnt)
3584 rpc_shutdown_client(client);
3585
1da177e4
LT		 3586 return err;
3587}
3588
80a16b21 3589static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3590 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3591 struct nfs4_label *label)
72de53ec
BS		 3592{
3593 int status;
3594 struct rpc_clnt *client = NFS_CLIENT(dir);
3595
1775fd3e 3596 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3597 if (client != NFS_CLIENT(dir)) {
3598 rpc_shutdown_client(client);
3599 nfs_fixup_secinfo_attributes(fattr);
3600 }
3601 return status;
3602}
3603
f05d147f
BS		 3604struct rpc_clnt *
3605nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3606 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3607{
b72888cb 3608 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3609 int status;
f05d147f 3610
1775fd3e 3611 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3612 if (status < 0)
f05d147f 3613 return ERR_PTR(status);
b72888cb 3614 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3615}
3616
1da177e4
LT		 3617static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3618{
76b32999 3619 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3620 struct nfs4_accessargs args = {
3621 .fh = NFS_FH(inode),
a4980e78 3622 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3623 };
3624 struct nfs4_accessres res = {
3625 .server = server,
1da177e4 3626 };
1da177e4
LT		 3627 struct rpc_message msg = {
3628 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3629 .rpc_argp = &args,
3630 .rpc_resp = &res,
3631 .rpc_cred = entry->cred,
3632 };
3633 int mode = entry->mask;
aa9c2669 3634 int status = 0;
1da177e4
LT		 3635
3636 /*
3637 * Determine which access bits we want to ask for...
3638 */
3639 if (mode & MAY_READ)
3640 args.access |= NFS4_ACCESS_READ;
3641 if (S_ISDIR(inode->i_mode)) {
3642 if (mode & MAY_WRITE)
3643 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3644 if (mode & MAY_EXEC)
3645 args.access |= NFS4_ACCESS_LOOKUP;
3646 } else {
3647 if (mode & MAY_WRITE)
3648 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3649 if (mode & MAY_EXEC)
3650 args.access |= NFS4_ACCESS_EXECUTE;
3651 }
c407d41a
TM		 3652
3653 res.fattr = nfs_alloc_fattr();
3654 if (res.fattr == NULL)
3655 return -ENOMEM;
3656
7c513058 3657 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3658 if (!status) {
6168f62c 3659 nfs_access_set_mask(entry, res.access);
c407d41a 3660 nfs_refresh_inode(inode, res.fattr);
1da177e4 3661 }
c407d41a 3662 nfs_free_fattr(res.fattr);
1da177e4
LT		 3663 return status;
3664}
3665
3666static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3667{
3668 struct nfs4_exception exception = { };
3669 int err;
3670 do {
c1578b76
TM		 3671 err = _nfs4_proc_access(inode, entry);
3672 trace_nfs4_access(inode, err);
3673 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3674 &exception);
3675 } while (exception.retry);
3676 return err;
3677}
3678
3679/*
3680 * TODO: For the time being, we don't try to get any attributes
3681 * along with any of the zero-copy operations READ, READDIR,
3682 * READLINK, WRITE.
3683 *
3684 * In the case of the first three, we want to put the GETATTR
3685 * after the read-type operation -- this is because it is hard
3686 * to predict the length of a GETATTR response in v4, and thus
3687 * align the READ data correctly. This means that the GETATTR
3688 * may end up partially falling into the page cache, and we should
3689 * shift it into the 'tail' of the xdr_buf before processing.
3690 * To do this efficiently, we need to know the total length
3691 * of data received, which doesn't seem to be available outside
3692 * of the RPC layer.
3693 *
3694 * In the case of WRITE, we also want to put the GETATTR after
3695 * the operation -- in this case because we want to make sure
140150db 3696 * we get the post-operation mtime and size.
1da177e4
LT		 3697 *
3698 * Both of these changes to the XDR layer would in fact be quite
3699 * minor, but I decided to leave them for a subsequent patch.
3700 */
3701static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3702 unsigned int pgbase, unsigned int pglen)
3703{
3704 struct nfs4_readlink args = {
3705 .fh = NFS_FH(inode),
3706 .pgbase = pgbase,
3707 .pglen = pglen,
3708 .pages = &page,
3709 };
f50c7000 3710 struct nfs4_readlink_res res;
1da177e4
LT		 3711 struct rpc_message msg = {
3712 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3713 .rpc_argp = &args,
f50c7000 3714 .rpc_resp = &res,
1da177e4
LT		 3715 };
3716
7c513058 3717 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3718}
3719
3720static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3721 unsigned int pgbase, unsigned int pglen)
3722{
3723 struct nfs4_exception exception = { };
3724 int err;
3725 do {
c1578b76
TM		 3726 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3727 trace_nfs4_readlink(inode, err);
3728 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3729 &exception);
3730 } while (exception.retry);
3731 return err;
3732}
3733
1da177e4 3734/*
8867fe58 3735 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3736 */
1da177e4
LT		 3737static int
3738nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3739 int flags)
1da177e4 3740{
aa9c2669 3741 struct nfs4_label l, *ilabel = NULL;
8867fe58 3742 struct nfs_open_context *ctx;
1da177e4 3743 struct nfs4_state *state;
1da177e4
LT		 3744 int status = 0;
3745
8867fe58
MS		 3746 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3747 if (IS_ERR(ctx))
3748 return PTR_ERR(ctx);
3749
aa9c2669
DQ		 3750 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3751
a8a5da99 3752 sattr->ia_mode &= ~current_umask();
c5c3fb5f 3753 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 3754 if (IS_ERR(state)) {
3755 status = PTR_ERR(state);
c0204fd2 3756 goto out;
1da177e4 3757 }
1da177e4 3758out:
aa9c2669 3759 nfs4_label_release_security(ilabel);
8867fe58 3760 put_nfs_open_context(ctx);
1da177e4
LT		 3761 return status;
3762}
3763
3764static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3765{
16e42959 3766 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3767 struct nfs_removeargs args = {
1da177e4 3768 .fh = NFS_FH(dir),
26fe5750 3769 .name = *name,
16e42959 3770 };
4fdc17b2 3771 struct nfs_removeres res = {
16e42959 3772 .server = server,
1da177e4 3773 };
1da177e4 3774 struct rpc_message msg = {
4fdc17b2
TM		 3775 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3776 .rpc_argp = &args,
3777 .rpc_resp = &res,
1da177e4 3778 };
778d2817 3779 int status;
1da177e4 3780
7c513058 3781 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3782 if (status == 0)
16e42959 3783 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3784 return status;
3785}
3786
3787static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3788{
3789 struct nfs4_exception exception = { };
3790 int err;
3791 do {
078ea3df
TM		 3792 err = _nfs4_proc_remove(dir, name);
3793 trace_nfs4_remove(dir, name, err);
3794 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3795 &exception);
3796 } while (exception.retry);
3797 return err;
3798}
3799
e4eff1a6 3800static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3801{
e4eff1a6
TM		 3802 struct nfs_server *server = NFS_SERVER(dir);
3803 struct nfs_removeargs *args = msg->rpc_argp;
3804 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3805
e4eff1a6 3806 res->server = server;
1da177e4 3807 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3808 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3809
3810 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3811}
3812
34e137cc
BS		 3813static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3814{
884be175 3815 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb),
d9afbd1b
TM		 3816 &data->args.seq_args,
3817 &data->res.seq_res,
3818 task);
1da177e4
LT		 3819}
3820
e4eff1a6 3821static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3822{
078ea3df
TM		 3823 struct nfs_unlinkdata *data = task->tk_calldata;
3824 struct nfs_removeres *res = &data->res;
e4eff1a6 3825
14516c3a
TM		 3826 if (!nfs4_sequence_done(task, &res->seq_res))
3827 return 0;
8478eaa1
N		 3828 if (nfs4_async_handle_error(task, res->server, NULL,
3829 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3830 return 0;
3831 update_changeattr(dir, &res->cinfo);
e4eff1a6 3832 return 1;
1da177e4
LT		 3833}
3834
d3d4152a
JL		 3835static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3836{
3837 struct nfs_server *server = NFS_SERVER(dir);
3838 struct nfs_renameargs *arg = msg->rpc_argp;
3839 struct nfs_renameres *res = msg->rpc_resp;
3840
3841 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3842 res->server = server;
a9c92d6b 3843 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3844}
3845
c6bfa1a1
BS		 3846static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3847{
d9afbd1b
TM		 3848 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3849 &data->args.seq_args,
3850 &data->res.seq_res,
3851 task);
d3d4152a
JL		 3852}
3853
3854static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3855 struct inode *new_dir)
3856{
fbc6f7c2
TM		 3857 struct nfs_renamedata *data = task->tk_calldata;
3858 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3859
3860 if (!nfs4_sequence_done(task, &res->seq_res))
3861 return 0;
8478eaa1 3862 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3863 return 0;
3864
3865 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3866 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3867 return 1;
3868}
3869
1da177e4
LT		 3870static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3871{
91ba2eee 3872 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3873 struct nfs4_link_arg arg = {
3874 .fh = NFS_FH(inode),
3875 .dir_fh = NFS_FH(dir),
3876 .name = name,
91ba2eee
TM		 3877 .bitmask = server->attr_bitmask,
3878 };
91ba2eee
TM		 3879 struct nfs4_link_res res = {
3880 .server = server,
1775fd3e 3881 .label = NULL,
1da177e4 3882 };
1da177e4
LT		 3883 struct rpc_message msg = {
3884 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3885 .rpc_argp = &arg,
91ba2eee 3886 .rpc_resp = &res,
1da177e4 3887 };
136f2627
TM		 3888 int status = -ENOMEM;
3889
3890 res.fattr = nfs_alloc_fattr();
778d2817 3891 if (res.fattr == NULL)
136f2627 3892 goto out;
1da177e4 3893
14c43f76
DQ		 3894 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3895 if (IS_ERR(res.label)) {
3896 status = PTR_ERR(res.label);
3897 goto out;
3898 }
aa9c2669 3899 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3900
7c513058 3901 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3902 if (!status) {
3903 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3904 status = nfs_post_op_update_inode(inode, res.fattr);
3905 if (!status)
3906 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3907 }
14c43f76
DQ		 3908
3909
3910 nfs4_label_free(res.label);
3911
136f2627 3912out:
136f2627 3913 nfs_free_fattr(res.fattr);
1da177e4
LT		 3914 return status;
3915}
3916
3917static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3918{
3919 struct nfs4_exception exception = { };
3920 int err;
3921 do {
3922 err = nfs4_handle_exception(NFS_SERVER(inode),
3923 _nfs4_proc_link(inode, dir, name),
3924 &exception);
3925 } while (exception.retry);
3926 return err;
3927}
3928
57dc9a57
TM		 3929struct nfs4_createdata {
3930 struct rpc_message msg;
3931 struct nfs4_create_arg arg;
3932 struct nfs4_create_res res;
3933 struct nfs_fh fh;
3934 struct nfs_fattr fattr;
1775fd3e 3935 struct nfs4_label *label;
57dc9a57
TM		 3936};
3937
3938static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3939 struct qstr *name, struct iattr *sattr, u32 ftype)
3940{
3941 struct nfs4_createdata *data;
3942
3943 data = kzalloc(sizeof(*data), GFP_KERNEL);
3944 if (data != NULL) {
3945 struct nfs_server *server = NFS_SERVER(dir);
3946
14c43f76
DQ		 3947 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3948 if (IS_ERR(data->label))
3949 goto out_free;
3950
57dc9a57
TM		 3951 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3952 data->msg.rpc_argp = &data->arg;
3953 data->msg.rpc_resp = &data->res;
3954 data->arg.dir_fh = NFS_FH(dir);
3955 data->arg.server = server;
3956 data->arg.name = name;
3957 data->arg.attrs = sattr;
3958 data->arg.ftype = ftype;
aa9c2669 3959 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3960 data->res.server = server;
3961 data->res.fh = &data->fh;
3962 data->res.fattr = &data->fattr;
1775fd3e 3963 data->res.label = data->label;
57dc9a57 3964 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3965 }
3966 return data;
14c43f76
DQ		 3967out_free:
3968 kfree(data);
3969 return NULL;
57dc9a57
TM		 3970}
3971
3972static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3973{
7c513058 3974 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3975 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3976 if (status == 0) {
3977 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3978 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3979 }
3980 return status;
3981}
3982
3983static void nfs4_free_createdata(struct nfs4_createdata *data)
3984{
14c43f76 3985 nfs4_label_free(data->label);
57dc9a57
TM		 3986 kfree(data);
3987}
3988
4f390c15 3989static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3990 struct page *page, unsigned int len, struct iattr *sattr,
3991 struct nfs4_label *label)
1da177e4 3992{
57dc9a57
TM		 3993 struct nfs4_createdata *data;
3994 int status = -ENAMETOOLONG;
1da177e4 3995
94a6d753 3996 if (len > NFS4_MAXPATHLEN)
57dc9a57 3997 goto out;
4f390c15 3998
57dc9a57
TM		 3999 status = -ENOMEM;
4000 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
4001 if (data == NULL)
4002 goto out;
4003
4004 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
4005 data->arg.u.symlink.pages = &page;
4006 data->arg.u.symlink.len = len;
1775fd3e 4007 data->arg.label = label;
1da177e4 4008
57dc9a57
TM		 4009 status = nfs4_do_create(dir, dentry, data);
4010
4011 nfs4_free_createdata(data);
4012out:
1da177e4
LT		 4013 return status;
4014}
4015
4f390c15 4016static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 4017 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 4018{
4019 struct nfs4_exception exception = { };
aa9c2669 4020 struct nfs4_label l, *label = NULL;
1da177e4 4021 int err;
aa9c2669
DQ		 4022
4023 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4024
1da177e4 4025 do {
078ea3df
TM		 4026 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4027 trace_nfs4_symlink(dir, &dentry->d_name, err);
4028 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4029 &exception);
4030 } while (exception.retry);
aa9c2669
DQ		 4031
4032 nfs4_label_release_security(label);
1da177e4
LT		 4033 return err;
4034}
4035
4036static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 4037 struct iattr *sattr, struct nfs4_label *label)
1da177e4 4038{
57dc9a57
TM		 4039 struct nfs4_createdata *data;
4040 int status = -ENOMEM;
1da177e4 4041
57dc9a57
TM		 4042 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4043 if (data == NULL)
4044 goto out;
4045
1775fd3e 4046 data->arg.label = label;
57dc9a57
TM		 4047 status = nfs4_do_create(dir, dentry, data);
4048
4049 nfs4_free_createdata(data);
4050out:
1da177e4
LT		 4051 return status;
4052}
4053
4054static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4055 struct iattr *sattr)
4056{
4057 struct nfs4_exception exception = { };
aa9c2669 4058 struct nfs4_label l, *label = NULL;
1da177e4 4059 int err;
a8a5da99 4060
aa9c2669
DQ		 4061 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4062
a8a5da99 4063 sattr->ia_mode &= ~current_umask();
1da177e4 4064 do {
078ea3df
TM		 4065 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4066 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4067 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4068 &exception);
4069 } while (exception.retry);
aa9c2669
DQ		 4070 nfs4_label_release_security(label);
4071
1da177e4
LT		 4072 return err;
4073}
4074
4075static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4076 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4 4077{
2b0143b5 4078 struct inode *dir = d_inode(dentry);
1da177e4
LT		 4079 struct nfs4_readdir_arg args = {
4080 .fh = NFS_FH(dir),
56e4ebf8 4081 .pages = pages,
1da177e4
LT		 4082 .pgbase = 0,
4083 .count = count,
2b0143b5 4084 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 4085 .plus = plus,
1da177e4
LT		 4086 };
4087 struct nfs4_readdir_res res;
4088 struct rpc_message msg = {
4089 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4090 .rpc_argp = &args,
4091 .rpc_resp = &res,
4092 .rpc_cred = cred,
4093 };
4094 int status;
4095
6de1472f
AV		 4096 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4097 dentry,
eadf4598 4098 (unsigned long long)cookie);
c3f52af3 4099 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 4100 res.pgbase = args.pgbase;
7c513058 4101 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 4102 if (status >= 0) {
c3f52af3 4103 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 4104 status += args.pgbase;
4105 }
c4812998
TM		 4106
4107 nfs_invalidate_atime(dir);
4108
3110ff80 4109 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 4110 return status;
4111}
4112
4113static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4114 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 4115{
4116 struct nfs4_exception exception = { };
4117 int err;
4118 do {
c1578b76
TM		 4119 err = _nfs4_proc_readdir(dentry, cred, cookie,
4120 pages, count, plus);
2b0143b5
DH		 4121 trace_nfs4_readdir(d_inode(dentry), err);
4122 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 4123 &exception);
4124 } while (exception.retry);
4125 return err;
4126}
4127
4128static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 4129 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 4130{
57dc9a57
TM		 4131 struct nfs4_createdata *data;
4132 int mode = sattr->ia_mode;
4133 int status = -ENOMEM;
1da177e4 4134
57dc9a57
TM		 4135 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4136 if (data == NULL)
4137 goto out;
4138
1da177e4 4139 if (S_ISFIFO(mode))
57dc9a57 4140 data->arg.ftype = NF4FIFO;
1da177e4 4141 else if (S_ISBLK(mode)) {
57dc9a57
TM		 4142 data->arg.ftype = NF4BLK;
4143 data->arg.u.device.specdata1 = MAJOR(rdev);
4144 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 4145 }
4146 else if (S_ISCHR(mode)) {
57dc9a57
TM		 4147 data->arg.ftype = NF4CHR;
4148 data->arg.u.device.specdata1 = MAJOR(rdev);
4149 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 4150 } else if (!S_ISSOCK(mode)) {
4151 status = -EINVAL;
4152 goto out_free;
1da177e4 4153 }
1775fd3e 4154
aa9c2669 4155 data->arg.label = label;
57dc9a57 4156 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 4157out_free:
57dc9a57
TM		 4158 nfs4_free_createdata(data);
4159out:
1da177e4
LT		 4160 return status;
4161}
4162
4163static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4164 struct iattr *sattr, dev_t rdev)
4165{
4166 struct nfs4_exception exception = { };
aa9c2669 4167 struct nfs4_label l, *label = NULL;
1da177e4 4168 int err;
a8a5da99 4169
aa9c2669
DQ		 4170 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4171
a8a5da99 4172 sattr->ia_mode &= ~current_umask();
1da177e4 4173 do {
078ea3df
TM		 4174 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4175 trace_nfs4_mknod(dir, &dentry->d_name, err);
4176 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4177 &exception);
4178 } while (exception.retry);
aa9c2669
DQ		 4179
4180 nfs4_label_release_security(label);
4181
1da177e4
LT		 4182 return err;
4183}
4184
4185static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4186 struct nfs_fsstat *fsstat)
4187{
4188 struct nfs4_statfs_arg args = {
4189 .fh = fhandle,
4190 .bitmask = server->attr_bitmask,
4191 };
24ad148a
BH		 4192 struct nfs4_statfs_res res = {
4193 .fsstat = fsstat,
4194 };
1da177e4
LT		 4195 struct rpc_message msg = {
4196 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4197 .rpc_argp = &args,
24ad148a 4198 .rpc_resp = &res,
1da177e4
LT		 4199 };
4200
0e574af1 4201 nfs_fattr_init(fsstat->fattr);
7c513058 4202 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4203}
4204
4205static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4206{
4207 struct nfs4_exception exception = { };
4208 int err;
4209 do {
4210 err = nfs4_handle_exception(server,
4211 _nfs4_proc_statfs(server, fhandle, fsstat),
4212 &exception);
4213 } while (exception.retry);
4214 return err;
4215}
4216
4217static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4218 struct nfs_fsinfo *fsinfo)
4219{
4220 struct nfs4_fsinfo_arg args = {
4221 .fh = fhandle,
4222 .bitmask = server->attr_bitmask,
4223 };
3dda5e43
BH		 4224 struct nfs4_fsinfo_res res = {
4225 .fsinfo = fsinfo,
4226 };
1da177e4
LT		 4227 struct rpc_message msg = {
4228 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4229 .rpc_argp = &args,
3dda5e43 4230 .rpc_resp = &res,
1da177e4
LT		 4231 };
4232
7c513058 4233 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4234}
4235
4236static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4237{
4238 struct nfs4_exception exception = { };
83ca7f5a 4239 unsigned long now = jiffies;
1da177e4
LT		 4240 int err;
4241
4242 do {
83ca7f5a 4243 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4244 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 4245 if (err == 0) {
4246 struct nfs_client *clp = server->nfs_client;
4247
4248 spin_lock(&clp->cl_lock);
4249 clp->cl_lease_time = fsinfo->lease_time * HZ;
4250 clp->cl_last_renewal = now;
4251 spin_unlock(&clp->cl_lock);
4252 break;
4253 }
4254 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4255 } while (exception.retry);
4256 return err;
4257}
4258
4259static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4260{
e38eb650
BS		 4261 int error;
4262
0e574af1 4263 nfs_fattr_init(fsinfo->fattr);
e38eb650 4264 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4265 if (error == 0) {
4266 /* block layout checks this! */
4267 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4268 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4269 }
e38eb650
BS		 4270
4271 return error;
1da177e4
LT		 4272}
4273
4274static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4275 struct nfs_pathconf *pathconf)
4276{
4277 struct nfs4_pathconf_arg args = {
4278 .fh = fhandle,
4279 .bitmask = server->attr_bitmask,
4280 };
d45b2989
BH		 4281 struct nfs4_pathconf_res res = {
4282 .pathconf = pathconf,
4283 };
1da177e4
LT		 4284 struct rpc_message msg = {
4285 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4286 .rpc_argp = &args,
d45b2989 4287 .rpc_resp = &res,
1da177e4
LT		 4288 };
4289
4290 /* None of the pathconf attributes are mandatory to implement */
4291 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4292 memset(pathconf, 0, sizeof(*pathconf));
4293 return 0;
4294 }
4295
0e574af1 4296 nfs_fattr_init(pathconf->fattr);
7c513058 4297 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4298}
4299
4300static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4301 struct nfs_pathconf *pathconf)
4302{
4303 struct nfs4_exception exception = { };
4304 int err;
4305
4306 do {
4307 err = nfs4_handle_exception(server,
4308 _nfs4_proc_pathconf(server, fhandle, pathconf),
4309 &exception);
4310 } while (exception.retry);
4311 return err;
4312}
4313
5521abfd 4314int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4315 const struct nfs_open_context *ctx,
4316 const struct nfs_lock_context *l_ctx,
4317 fmode_t fmode)
4318{
4319 const struct nfs_lockowner *lockowner = NULL;
4320
4321 if (l_ctx != NULL)
4322 lockowner = &l_ctx->lockowner;
abf4e13c 4323 return nfs4_select_rw_stateid(ctx->state, fmode, lockowner, stateid, NULL);
9b206149
TM		 4324}
4325EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4326
5521abfd
TM		 4327static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4328 const struct nfs_open_context *ctx,
4329 const struct nfs_lock_context *l_ctx,
4330 fmode_t fmode)
4331{
4332 nfs4_stateid current_stateid;
4333
e1253be0
TM		 4334 /* If the current stateid represents a lost lock, then exit */
4335 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4336 return true;
5521abfd
TM		 4337 return nfs4_stateid_match(stateid, &current_stateid);
4338}
4339
4340static bool nfs4_error_stateid_expired(int err)
4341{
4342 switch (err) {
4343 case -NFS4ERR_DELEG_REVOKED:
4344 case -NFS4ERR_ADMIN_REVOKED:
4345 case -NFS4ERR_BAD_STATEID:
4346 case -NFS4ERR_STALE_STATEID:
4347 case -NFS4ERR_OLD_STATEID:
4348 case -NFS4ERR_OPENMODE:
4349 case -NFS4ERR_EXPIRED:
4350 return true;
4351 }
4352 return false;
4353}
4354
d45f60c6 4355void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4356{
d45f60c6 4357 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4358}
4359
d45f60c6 4360static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4361{
d45f60c6 4362 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4363
d45f60c6
WAA		 4364 trace_nfs4_read(hdr, task->tk_status);
4365 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4366 hdr->args.context->state,
4367 NULL) == -EAGAIN) {
d00c5d43 4368 rpc_restart_call_prepare(task);
ec06c096 4369 return -EAGAIN;
1da177e4 4370 }
8850df99 4371
d45f60c6 4372 __nfs4_read_done_cb(hdr);
1da177e4 4373 if (task->tk_status > 0)
d45f60c6 4374 renew_lease(server, hdr->timestamp);
ec06c096 4375 return 0;
1da177e4
LT		 4376}
4377
5521abfd 4378static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4379 struct nfs_pgio_args *args)
5521abfd
TM		 4380{
4381
4382 if (!nfs4_error_stateid_expired(task->tk_status) ||
4383 nfs4_stateid_is_current(&args->stateid,
4384 args->context,
4385 args->lock_context,
4386 FMODE_READ))
4387 return false;
4388 rpc_restart_call_prepare(task);
4389 return true;
4390}
4391
d45f60c6 4392static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4393{
4394
4395 dprintk("--> %s\n", __func__);
4396
d45f60c6 4397 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4398 return -EAGAIN;
d45f60c6 4399 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4400 return -EAGAIN;
d45f60c6
WAA		 4401 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4402 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4403}
4404
d45f60c6
WAA		 4405static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4406 struct rpc_message *msg)
1da177e4 4407{
d45f60c6 4408 hdr->timestamp = jiffies;
ca857cc1
TM		 4409 if (!hdr->pgio_done_cb)
4410 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4411 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4412 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4413}
4414
d45f60c6
WAA		 4415static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4416 struct nfs_pgio_header *hdr)
ea7c3303 4417{
d45f60c6
WAA		 4418 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4419 &hdr->args.seq_args,
4420 &hdr->res.seq_res,
9b206149 4421 task))
ef1820f9 4422 return 0;
d45f60c6
WAA		 4423 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4424 hdr->args.lock_context,
4425 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4426 return -EIO;
d45f60c6 4427 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4428 return -EIO;
4429 return 0;
1da177e4
LT		 4430}
4431
d45f60c6
WAA		 4432static int nfs4_write_done_cb(struct rpc_task *task,
4433 struct nfs_pgio_header *hdr)
1da177e4 4434{
d45f60c6 4435 struct inode *inode = hdr->inode;
8478eaa1 4436
d45f60c6
WAA		 4437 trace_nfs4_write(hdr, task->tk_status);
4438 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4439 hdr->args.context->state,
4440 NULL) == -EAGAIN) {
d00c5d43 4441 rpc_restart_call_prepare(task);
788e7a89 4442 return -EAGAIN;
1da177e4 4443 }
4f9838c7 4444 if (task->tk_status >= 0) {
d45f60c6 4445 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4446 nfs_writeback_update_inode(hdr);
4f9838c7 4447 }
788e7a89 4448 return 0;
1da177e4
LT		 4449}
4450
5521abfd 4451static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4452 struct nfs_pgio_args *args)
5521abfd
TM		 4453{
4454
4455 if (!nfs4_error_stateid_expired(task->tk_status) ||
4456 nfs4_stateid_is_current(&args->stateid,
4457 args->context,
4458 args->lock_context,
4459 FMODE_WRITE))
4460 return false;
4461 rpc_restart_call_prepare(task);
4462 return true;
4463}
4464
d45f60c6 4465static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4466{
d45f60c6 4467 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4468 return -EAGAIN;
d45f60c6 4469 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4470 return -EAGAIN;
d45f60c6
WAA		 4471 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4472 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4473}
4474
5a37f851 4475static
d45f60c6 4476bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4477{
5a37f851 4478 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4479 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4480 return false;
4481 /* Otherwise, request attributes if and only if we don't hold
4482 * a delegation
4483 */
011e2a7f 4484 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4485}
a69aef14 4486
d45f60c6
WAA		 4487static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4488 struct rpc_message *msg)
1da177e4 4489{
d45f60c6 4490 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4491
d45f60c6
WAA		 4492 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4493 hdr->args.bitmask = NULL;
4494 hdr->res.fattr = NULL;
7ffd1064 4495 } else
d45f60c6 4496 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4497
d45f60c6
WAA		 4498 if (!hdr->pgio_done_cb)
4499 hdr->pgio_done_cb = nfs4_write_done_cb;
4500 hdr->res.server = server;
4501 hdr->timestamp = jiffies;
1da177e4 4502
bdc7f021 4503 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4504 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4505}
4506
0b7c0153 4507static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4508{
d9afbd1b
TM		 4509 nfs4_setup_sequence(NFS_SERVER(data->inode),
4510 &data->args.seq_args,
4511 &data->res.seq_res,
4512 task);
1da177e4
LT		 4513}
4514
0b7c0153 4515static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4516{
1da177e4 4517 struct inode *inode = data->inode;
14516c3a 4518
cc668ab3 4519 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4520 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4521 NULL, NULL) == -EAGAIN) {
d00c5d43 4522 rpc_restart_call_prepare(task);
788e7a89 4523 return -EAGAIN;
1da177e4 4524 }
788e7a89 4525 return 0;
1da177e4
LT		 4526}
4527
0b7c0153 4528static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4529{
4530 if (!nfs4_sequence_done(task, &data->res.seq_res))
4531 return -EAGAIN;
0b7c0153 4532 return data->commit_done_cb(task, data);
5f452431
FI		 4533}
4534
0b7c0153 4535static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4536{
788e7a89 4537 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4538
0b7c0153
FI		 4539 if (data->commit_done_cb == NULL)
4540 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4541 data->res.server = server;
bdc7f021 4542 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4543 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4544}
4545
9bc4e3ca
CL		 4546struct nfs4_renewdata {
4547 struct nfs_client *client;
4548 unsigned long timestamp;
4549};
4550
1da177e4
LT		 4551/*
4552 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4553 * standalone procedure for queueing an asynchronous RENEW.
4554 */
9bc4e3ca 4555static void nfs4_renew_release(void *calldata)
dc96aef9 4556{
9bc4e3ca
CL		 4557 struct nfs4_renewdata *data = calldata;
4558 struct nfs_client *clp = data->client;
dc96aef9 4559
0851de06
AB		 4560 if (atomic_read(&clp->cl_count) > 1)
4561 nfs4_schedule_state_renewal(clp);
4562 nfs_put_client(clp);
9bc4e3ca 4563 kfree(data);
dc96aef9
AB		 4564}
4565
9bc4e3ca 4566static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4567{
9bc4e3ca
CL		 4568 struct nfs4_renewdata *data = calldata;
4569 struct nfs_client *clp = data->client;
4570 unsigned long timestamp = data->timestamp;
1da177e4 4571
c6d01c6f 4572 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4573 switch (task->tk_status) {
4574 case 0:
4575 break;
4576 case -NFS4ERR_LEASE_MOVED:
4577 nfs4_schedule_lease_moved_recovery(clp);
4578 break;
4579 default:
95baa25c 4580 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4581 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4582 return;
4583 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4584 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4585 return;
4586 }
4587 nfs4_schedule_path_down_recovery(clp);
1da177e4 4588 }
452e9352 4589 do_renew_lease(clp, timestamp);
1da177e4
LT		 4590}
4591
963d8fe5
TM		 4592static const struct rpc_call_ops nfs4_renew_ops = {
4593 .rpc_call_done = nfs4_renew_done,
dc96aef9 4594 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4595};
4596
2f60ea6b 4597static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4598{
4599 struct rpc_message msg = {
4600 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4601 .rpc_argp = clp,
b4454fe1 4602 .rpc_cred = cred,
1da177e4 4603 };
9bc4e3ca 4604 struct nfs4_renewdata *data;
1da177e4 4605
2f60ea6b
TM		 4606 if (renew_flags == 0)
4607 return 0;
0851de06
AB		 4608 if (!atomic_inc_not_zero(&clp->cl_count))
4609 return -EIO;
b569ad34 4610 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4611 if (data == NULL)
4612 return -ENOMEM;
4613 data->client = clp;
4614 data->timestamp = jiffies;
bc7a05ca 4615 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4616 &nfs4_renew_ops, data);
1da177e4
LT		 4617}
4618
8534d4ec 4619static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4620{
4621 struct rpc_message msg = {
4622 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4623 .rpc_argp = clp,
b4454fe1 4624 .rpc_cred = cred,
1da177e4
LT		 4625 };
4626 unsigned long now = jiffies;
4627 int status;
4628
bc7a05ca 4629 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4630 if (status < 0)
4631 return status;
452e9352 4632 do_renew_lease(clp, now);
1da177e4
LT		 4633 return 0;
4634}
4635
aa1870af
BF		 4636static inline int nfs4_server_supports_acls(struct nfs_server *server)
4637{
7dd7d959 4638 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4639}
4640
21f498c2
TM		 4641/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4642 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4643 * the stack.
4644 */
21f498c2 4645#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4646
e9e3d724 4647static int buf_to_pages_noslab(const void *buf, size_t buflen,
8fbcf237 4648 struct page **pages)
e9e3d724
NH		 4649{
4650 struct page *newpage, **spages;
4651 int rc = 0;
4652 size_t len;
4653 spages = pages;
4654
4655 do {
21f498c2 4656 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4657 newpage = alloc_page(GFP_KERNEL);
4658
4659 if (newpage == NULL)
4660 goto unwind;
4661 memcpy(page_address(newpage), buf, len);
4662 buf += len;
4663 buflen -= len;
4664 *pages++ = newpage;
4665 rc++;
4666 } while (buflen != 0);
4667
4668 return rc;
4669
4670unwind:
4671 for(; rc > 0; rc--)
4672 __free_page(spages[rc-1]);
4673 return -ENOMEM;
4674}
4675
e50a1c2e
BF		 4676struct nfs4_cached_acl {
4677 int cached;
4678 size_t len;
3e9d4154 4679 char data[0];
e50a1c2e
BF		 4680};
4681
4682static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4683{
4684 struct nfs_inode *nfsi = NFS_I(inode);
4685
4686 spin_lock(&inode->i_lock);
4687 kfree(nfsi->nfs4_acl);
4688 nfsi->nfs4_acl = acl;
4689 spin_unlock(&inode->i_lock);
4690}
4691
4692static void nfs4_zap_acl_attr(struct inode *inode)
4693{
4694 nfs4_set_cached_acl(inode, NULL);
4695}
4696
4697static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4698{
4699 struct nfs_inode *nfsi = NFS_I(inode);
4700 struct nfs4_cached_acl *acl;
4701 int ret = -ENOENT;
4702
4703 spin_lock(&inode->i_lock);
4704 acl = nfsi->nfs4_acl;
4705 if (acl == NULL)
4706 goto out;
4707 if (buf == NULL) /* user is just asking for length */
4708 goto out_len;
4709 if (acl->cached == 0)
4710 goto out;
4711 ret = -ERANGE; /* see getxattr(2) man page */
4712 if (acl->len > buflen)
4713 goto out;
4714 memcpy(buf, acl->data, acl->len);
4715out_len:
4716 ret = acl->len;
4717out:
4718 spin_unlock(&inode->i_lock);
4719 return ret;
4720}
4721
5794d21e 4722static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4723{
4724 struct nfs4_cached_acl *acl;
b291f1b1 4725 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4726
1f1ea6c2 4727 if (buflen <= PAGE_SIZE) {
b291f1b1 4728 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4729 if (acl == NULL)
4730 goto out;
4731 acl->cached = 1;
5794d21e 4732 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4733 } else {
4734 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4735 if (acl == NULL)
4736 goto out;
4737 acl->cached = 0;
4738 }
4739 acl->len = acl_len;
4740out:
4741 nfs4_set_cached_acl(inode, acl);
4742}
4743
bf118a34
AA		 4744/*
4745 * The getxattr API returns the required buffer length when called with a
4746 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4747 * the required buf. On a NULL buf, we send a page of data to the server
4748 * guessing that the ACL request can be serviced by a page. If so, we cache
4749 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4750 * the cache. If not so, we throw away the page, and cache the required
4751 * length. The next getxattr call will then produce another round trip to
4752 * the server, this time with the input buf of the required size.
4753 */
16b4289c 4754static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4755{
bf118a34 4756 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4757 struct nfs_getaclargs args = {
4758 .fh = NFS_FH(inode),
4759 .acl_pages = pages,
4760 .acl_len = buflen,
4761 };
663c79b3
BH		 4762 struct nfs_getaclres res = {
4763 .acl_len = buflen,
4764 };
aa1870af
BF		 4765 struct rpc_message msg = {
4766 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4767 .rpc_argp = &args,
663c79b3 4768 .rpc_resp = &res,
aa1870af 4769 };
21f498c2
TM		 4770 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4771 int ret = -ENOMEM, i;
aa1870af 4772
bf118a34
AA		 4773 /* As long as we're doing a round trip to the server anyway,
4774 * let's be prepared for a page of acl data. */
4775 if (npages == 0)
4776 npages = 1;
21f498c2
TM		 4777 if (npages > ARRAY_SIZE(pages))
4778 return -ERANGE;
5a006899 4779
bf118a34
AA		 4780 for (i = 0; i < npages; i++) {
4781 pages[i] = alloc_page(GFP_KERNEL);
4782 if (!pages[i])
4783 goto out_free;
e50a1c2e 4784 }
5a006899
SP		 4785
4786 /* for decoding across pages */
4787 res.acl_scratch = alloc_page(GFP_KERNEL);
4788 if (!res.acl_scratch)
4789 goto out_free;
4790
bf118a34 4791 args.acl_len = npages * PAGE_SIZE;
5a006899 4792
de040bec 4793 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4794 __func__, buf, buflen, npages, args.acl_len);
4795 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4796 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4797 if (ret)
4798 goto out_free;
bf118a34 4799
1f1ea6c2
TM		 4800 /* Handle the case where the passed-in buffer is too short */
4801 if (res.acl_flags & NFS4_ACL_TRUNC) {
4802 /* Did the user only issue a request for the acl length? */
4803 if (buf == NULL)
4804 goto out_ok;
e50a1c2e 4805 ret = -ERANGE;
1f1ea6c2 4806 goto out_free;
e50a1c2e 4807 }
1f1ea6c2 4808 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4809 if (buf) {
4810 if (res.acl_len > buflen) {
4811 ret = -ERANGE;
4812 goto out_free;
4813 }
1f1ea6c2 4814 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4815 }
1f1ea6c2
TM		 4816out_ok:
4817 ret = res.acl_len;
e50a1c2e 4818out_free:
bf118a34
AA		 4819 for (i = 0; i < npages; i++)
4820 if (pages[i])
4821 __free_page(pages[i]);
331818f1
TM		 4822 if (res.acl_scratch)
4823 __free_page(res.acl_scratch);
aa1870af
BF		 4824 return ret;
4825}
4826
16b4289c
TM		 4827static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4828{
4829 struct nfs4_exception exception = { };
4830 ssize_t ret;
4831 do {
4832 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4833 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4834 if (ret >= 0)
4835 break;
4836 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4837 } while (exception.retry);
4838 return ret;
4839}
4840
e50a1c2e
BF		 4841static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4842{
4843 struct nfs_server *server = NFS_SERVER(inode);
4844 int ret;
4845
4846 if (!nfs4_server_supports_acls(server))
4847 return -EOPNOTSUPP;
4848 ret = nfs_revalidate_inode(server, inode);
4849 if (ret < 0)
4850 return ret;
08a22b39
AK		 4851 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4852 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4853 ret = nfs4_read_cached_acl(inode, buf, buflen);
4854 if (ret != -ENOENT)
bf118a34
AA		 4855 /* -ENOENT is returned if there is no ACL or if there is an ACL
4856 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4857 return ret;
4858 return nfs4_get_acl_uncached(inode, buf, buflen);
4859}
4860
16b4289c 4861static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4862{
4863 struct nfs_server *server = NFS_SERVER(inode);
4864 struct page *pages[NFS4ACL_MAXPAGES];
4865 struct nfs_setaclargs arg = {
4866 .fh = NFS_FH(inode),
4867 .acl_pages = pages,
4868 .acl_len = buflen,
4869 };
73c403a9 4870 struct nfs_setaclres res;
4b580ee3
BF		 4871 struct rpc_message msg = {
4872 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4873 .rpc_argp = &arg,
73c403a9 4874 .rpc_resp = &res,
4b580ee3 4875 };
21f498c2 4876 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4877 int ret, i;
4b580ee3
BF		 4878
4879 if (!nfs4_server_supports_acls(server))
4880 return -EOPNOTSUPP;
21f498c2
TM		 4881 if (npages > ARRAY_SIZE(pages))
4882 return -ERANGE;
8fbcf237 4883 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
e9e3d724
NH		 4884 if (i < 0)
4885 return i;
57ec14c5 4886 nfs4_inode_return_delegation(inode);
7c513058 4887 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4888
4889 /*
4890 * Free each page after tx, so the only ref left is
4891 * held by the network stack
4892 */
4893 for (; i > 0; i--)
4894 put_page(pages[i-1]);
4895
08a22b39
AK		 4896 /*
4897 * Acl update can result in inode attribute update.
4898 * so mark the attribute cache invalid.
4899 */
4900 spin_lock(&inode->i_lock);
4901 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4902 spin_unlock(&inode->i_lock);
f41f7418
TM		 4903 nfs_access_zap_cache(inode);
4904 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4905 return ret;
4906}
4907
16b4289c
TM		 4908static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4909{
4910 struct nfs4_exception exception = { };
4911 int err;
4912 do {
c1578b76
TM		 4913 err = __nfs4_proc_set_acl(inode, buf, buflen);
4914 trace_nfs4_set_acl(inode, err);
4915 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4916 &exception);
4917 } while (exception.retry);
4918 return err;
4919}
4920
aa9c2669
DQ		 4921#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4922static int _nfs4_get_security_label(struct inode *inode, void *buf,
4923 size_t buflen)
4924{
4925 struct nfs_server *server = NFS_SERVER(inode);
4926 struct nfs_fattr fattr;
4927 struct nfs4_label label = {0, 0, buflen, buf};
4928
4929 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4930 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4931 .fh = NFS_FH(inode),
4932 .bitmask = bitmask,
4933 };
4934 struct nfs4_getattr_res res = {
4935 .fattr = &fattr,
4936 .label = &label,
4937 .server = server,
4938 };
4939 struct rpc_message msg = {
4940 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4941 .rpc_argp = &arg,
aa9c2669
DQ		 4942 .rpc_resp = &res,
4943 };
4944 int ret;
4945
4946 nfs_fattr_init(&fattr);
4947
fcb63a9b 4948 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4949 if (ret)
4950 return ret;
4951 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4952 return -ENOENT;
4953 if (buflen < label.len)
4954 return -ERANGE;
4955 return 0;
4956}
4957
4958static int nfs4_get_security_label(struct inode *inode, void *buf,
4959 size_t buflen)
4960{
4961 struct nfs4_exception exception = { };
4962 int err;
4963
4964 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4965 return -EOPNOTSUPP;
4966
4967 do {
c1578b76
TM		 4968 err = _nfs4_get_security_label(inode, buf, buflen);
4969 trace_nfs4_get_security_label(inode, err);
4970 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4971 &exception);
4972 } while (exception.retry);
4973 return err;
4974}
4975
4976static int _nfs4_do_set_security_label(struct inode *inode,
4977 struct nfs4_label *ilabel,
4978 struct nfs_fattr *fattr,
4979 struct nfs4_label *olabel)
4980{
4981
4982 struct iattr sattr = {0};
4983 struct nfs_server *server = NFS_SERVER(inode);
4984 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4985 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4986 .fh = NFS_FH(inode),
4987 .iap = &sattr,
4988 .server = server,
4989 .bitmask = bitmask,
4990 .label = ilabel,
4991 };
4992 struct nfs_setattrres res = {
4993 .fattr = fattr,
4994 .label = olabel,
4995 .server = server,
4996 };
4997 struct rpc_message msg = {
4998 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4999 .rpc_argp = &arg,
aa9c2669
DQ		 5000 .rpc_resp = &res,
5001 };
5002 int status;
5003
12207f69 5004 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 5005
12207f69 5006 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 5007 if (status)
5008 dprintk("%s failed: %d\n", __func__, status);
5009
5010 return status;
5011}
5012
5013static int nfs4_do_set_security_label(struct inode *inode,
5014 struct nfs4_label *ilabel,
5015 struct nfs_fattr *fattr,
5016 struct nfs4_label *olabel)
5017{
5018 struct nfs4_exception exception = { };
5019 int err;
5020
5021 do {
c1578b76
TM		 5022 err = _nfs4_do_set_security_label(inode, ilabel,
5023 fattr, olabel);
5024 trace_nfs4_set_security_label(inode, err);
5025 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5026 &exception);
5027 } while (exception.retry);
5028 return err;
5029}
5030
5031static int
59301226 5032nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
aa9c2669
DQ		 5033{
5034 struct nfs4_label ilabel, *olabel = NULL;
5035 struct nfs_fattr fattr;
5036 struct rpc_cred *cred;
aa9c2669
DQ		 5037 int status;
5038
5039 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5040 return -EOPNOTSUPP;
5041
5042 nfs_fattr_init(&fattr);
5043
5044 ilabel.pi = 0;
5045 ilabel.lfs = 0;
5046 ilabel.label = (char *)buf;
5047 ilabel.len = buflen;
5048
5049 cred = rpc_lookup_cred();
5050 if (IS_ERR(cred))
5051 return PTR_ERR(cred);
5052
5053 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5054 if (IS_ERR(olabel)) {
5055 status = -PTR_ERR(olabel);
5056 goto out;
5057 }
5058
5059 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5060 if (status == 0)
5061 nfs_setsecurity(inode, &fattr, olabel);
5062
5063 nfs4_label_free(olabel);
5064out:
5065 put_rpccred(cred);
5066 return status;
5067}
5068#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5069
5070
f092075d
CL		 5071static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5072 nfs4_verifier *bootverf)
cd93710e
CL		 5073{
5074 __be32 verf[2];
5075
2c820d9a
CL		 5076 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5077 /* An impossible timestamp guarantees this value
5078 * will never match a generated boot time. */
5079 verf[0] = 0;
17f26b12 5080 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 5081 } else {
f092075d 5082 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 5083 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
5084 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 5085 }
cd93710e
CL		 5086 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5087}
5088
a3192688
JL		 5089static int
5090nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 5091{
a3192688
JL		 5092 size_t len;
5093 char *str;
e984a55a 5094
ceb3a16c 5095 if (clp->cl_owner_id != NULL)
a3192688 5096 return 0;
4a3e5779 5097
a3192688 5098 rcu_read_lock();
4a70316c 5099 len = 14 + strlen(clp->cl_ipaddr) + 1 +
a3192688
JL		 5100 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5101 1 +
5102 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5103 1;
5104 rcu_read_unlock();
5105
5106 if (len > NFS4_OPAQUE_LIMIT + 1)
5107 return -EINVAL;
5108
5109 /*
5110 * Since this string is allocated at mount time, and held until the
5111 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5112 * about a memory-reclaim deadlock.
5113 */
5114 str = kmalloc(len, GFP_KERNEL);
5115 if (!str)
5116 return -ENOMEM;
ceb3a16c 5117
e984a55a 5118 rcu_read_lock();
f2dd436e 5119 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
a3192688
JL		 5120 clp->cl_ipaddr,
5121 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5122 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5123 rcu_read_unlock();
a3192688 5124
a3192688
JL		 5125 clp->cl_owner_id = str;
5126 return 0;
e984a55a
CL		 5127}
5128
873e3851
JL		 5129static int
5130nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5131{
873e3851
JL		 5132 size_t len;
5133 char *str;
5134
5135 len = 10 + 10 + 1 + 10 + 1 +
5136 strlen(nfs4_client_id_uniquifier) + 1 +
5137 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5138
5139 if (len > NFS4_OPAQUE_LIMIT + 1)
5140 return -EINVAL;
5141
5142 /*
5143 * Since this string is allocated at mount time, and held until the
5144 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5145 * about a memory-reclaim deadlock.
5146 */
5147 str = kmalloc(len, GFP_KERNEL);
5148 if (!str)
5149 return -ENOMEM;
5150
f2dd436e 5151 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
873e3851
JL		 5152 clp->rpc_ops->version, clp->cl_minorversion,
5153 nfs4_client_id_uniquifier,
5154 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5155 clp->cl_owner_id = str;
5156 return 0;
5157}
5158
5159static int
5160nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5161{
873e3851
JL		 5162 size_t len;
5163 char *str;
ceb3a16c
TM		 5164
5165 if (clp->cl_owner_id != NULL)
873e3851 5166 return 0;
6f2ea7f2
CL		 5167
5168 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5169 return nfs4_init_uniquifier_client_string(clp);
5170
5171 len = 10 + 10 + 1 + 10 + 1 +
5172 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5173
5174 if (len > NFS4_OPAQUE_LIMIT + 1)
5175 return -EINVAL;
5176
5177 /*
5178 * Since this string is allocated at mount time, and held until the
5179 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5180 * about a memory-reclaim deadlock.
5181 */
5182 str = kmalloc(len, GFP_KERNEL);
5183 if (!str)
5184 return -ENOMEM;
5185
f2dd436e 5186 scnprintf(str, len, "Linux NFSv%u.%u %s",
873e3851
JL		 5187 clp->rpc_ops->version, clp->cl_minorversion,
5188 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5189 clp->cl_owner_id = str;
5190 return 0;
e984a55a
CL		 5191}
5192
706cb8db
CL		 5193/*
5194 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5195 * services. Advertise one based on the address family of the
5196 * clientaddr.
5197 */
5198static unsigned int
5199nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5200{
5201 if (strchr(clp->cl_ipaddr, ':') != NULL)
5202 return scnprintf(buf, len, "tcp6");
5203 else
5204 return scnprintf(buf, len, "tcp");
5205}
5206
f11b2a1c
JL		 5207static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5208{
5209 struct nfs4_setclientid *sc = calldata;
5210
5211 if (task->tk_status == 0)
5212 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5213}
5214
5215static const struct rpc_call_ops nfs4_setclientid_ops = {
5216 .rpc_call_done = nfs4_setclientid_done,
5217};
5218
6bbb4ae8
CL		 5219/**
5220 * nfs4_proc_setclientid - Negotiate client ID
5221 * @clp: state data structure
5222 * @program: RPC program for NFSv4 callback service
5223 * @port: IP port number for NFS4 callback service
5224 * @cred: RPC credential to use for this call
5225 * @res: where to place the result
5226 *
5227 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5228 */
bb8b27e5
TM		 5229int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5230 unsigned short port, struct rpc_cred *cred,
5231 struct nfs4_setclientid_res *res)
1da177e4
LT		 5232{
5233 nfs4_verifier sc_verifier;
5234 struct nfs4_setclientid setclientid = {
5235 .sc_verifier = &sc_verifier,
5236 .sc_prog = program,
3a6bb738 5237 .sc_clnt = clp,
1da177e4
LT		 5238 };
5239 struct rpc_message msg = {
5240 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5241 .rpc_argp = &setclientid,
bb8b27e5 5242 .rpc_resp = res,
286d7d6a 5243 .rpc_cred = cred,
1da177e4 5244 };
f11b2a1c
JL		 5245 struct rpc_task *task;
5246 struct rpc_task_setup task_setup_data = {
5247 .rpc_client = clp->cl_rpcclient,
5248 .rpc_message = &msg,
5249 .callback_ops = &nfs4_setclientid_ops,
5250 .callback_data = &setclientid,
5251 .flags = RPC_TASK_TIMEOUT,
5252 };
6bbb4ae8 5253 int status;
1da177e4 5254
de734831 5255 /* nfs_client_id4 */
f092075d 5256 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5257
5258 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5259 status = nfs4_init_uniform_client_string(clp);
5260 else
a3192688 5261 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5262
5263 if (status)
5264 goto out;
3a6bb738 5265
de734831 5266 /* cb_client4 */
706cb8db
CL		 5267 setclientid.sc_netid_len =
5268 nfs4_init_callback_netid(clp,
5269 setclientid.sc_netid,
5270 sizeof(setclientid.sc_netid));
de734831 5271 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5272 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5273 clp->cl_ipaddr, port >> 8, port & 255);
5274
3a6bb738 5275 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5276 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5277 clp->cl_owner_id);
f11b2a1c
JL		 5278 task = rpc_run_task(&task_setup_data);
5279 if (IS_ERR(task)) {
5280 status = PTR_ERR(task);
5281 goto out;
5282 }
5283 status = task->tk_status;
5284 if (setclientid.sc_cred) {
5285 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5286 put_rpccred(setclientid.sc_cred);
5287 }
5288 rpc_put_task(task);
5289out:
c6d01c6f 5290 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5291 dprintk("NFS reply setclientid: %d\n", status);
5292 return status;
1da177e4
LT		 5293}
5294
6bbb4ae8
CL		 5295/**
5296 * nfs4_proc_setclientid_confirm - Confirm client ID
5297 * @clp: state data structure
5298 * @res: result of a previous SETCLIENTID
5299 * @cred: RPC credential to use for this call
5300 *
5301 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5302 */
fd954ae1 5303int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5304 struct nfs4_setclientid_res *arg,
5305 struct rpc_cred *cred)
1da177e4 5306{
1da177e4
LT		 5307 struct rpc_message msg = {
5308 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5309 .rpc_argp = arg,
286d7d6a 5310 .rpc_cred = cred,
1da177e4 5311 };
1da177e4
LT		 5312 int status;
5313
6bbb4ae8
CL		 5314 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5315 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5316 clp->cl_clientid);
1bd714f2 5317 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5318 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5319 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5320 return status;
5321}
5322
fe650407
TM		 5323struct nfs4_delegreturndata {
5324 struct nfs4_delegreturnargs args;
fa178f29 5325 struct nfs4_delegreturnres res;
fe650407
TM		 5326 struct nfs_fh fh;
5327 nfs4_stateid stateid;
26e976a8 5328 unsigned long timestamp;
fa178f29 5329 struct nfs_fattr fattr;
fe650407 5330 int rpc_status;
039b756a
PT		 5331 struct inode *inode;
5332 bool roc;
5333 u32 roc_barrier;
fe650407
TM		 5334};
5335
fe650407
TM		 5336static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5337{
5338 struct nfs4_delegreturndata *data = calldata;
938e1010 5339
14516c3a
TM		 5340 if (!nfs4_sequence_done(task, &data->res.seq_res))
5341 return;
938e1010 5342
ca8acf8d 5343 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5344 switch (task->tk_status) {
79708861 5345 case 0:
fa178f29 5346 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5347 case -NFS4ERR_ADMIN_REVOKED:
5348 case -NFS4ERR_DELEG_REVOKED:
5349 case -NFS4ERR_BAD_STATEID:
5350 case -NFS4ERR_OLD_STATEID:
5351 case -NFS4ERR_STALE_STATEID:
5352 case -NFS4ERR_EXPIRED:
5353 task->tk_status = 0;
039b756a
PT		 5354 if (data->roc)
5355 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5356 break;
79708861 5357 default:
8478eaa1
N		 5358 if (nfs4_async_handle_error(task, data->res.server,
5359 NULL, NULL) == -EAGAIN) {
d00c5d43 5360 rpc_restart_call_prepare(task);
79708861
RL		 5361 return;
5362 }
5363 }
5364 data->rpc_status = task->tk_status;
fe650407
TM		 5365}
5366
5367static void nfs4_delegreturn_release(void *calldata)
5368{
039b756a 5369 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5370 struct inode *inode = data->inode;
039b756a 5371
ea7c38fe
TM		 5372 if (inode) {
5373 if (data->roc)
5374 pnfs_roc_release(inode);
5375 nfs_iput_and_deactive(inode);
5376 }
fe650407
TM		 5377 kfree(calldata);
5378}
5379
938e1010
AA		 5380static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5381{
5382 struct nfs4_delegreturndata *d_data;
5383
5384 d_data = (struct nfs4_delegreturndata *)data;
5385
500d701f
PT		 5386 if (nfs4_wait_on_layoutreturn(d_data->inode, task))
5387 return;
5388
4ff376fe
TM		 5389 if (d_data->roc)
5390 pnfs_roc_get_barrier(d_data->inode, &d_data->roc_barrier);
039b756a 5391
d9afbd1b
TM		 5392 nfs4_setup_sequence(d_data->res.server,
5393 &d_data->args.seq_args,
5394 &d_data->res.seq_res,
5395 task);
938e1010 5396}
938e1010 5397
c8d149f3 5398static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5399 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5400 .rpc_call_done = nfs4_delegreturn_done,
5401 .rpc_release = nfs4_delegreturn_release,
5402};
5403
e6f81075 5404static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5405{
5406 struct nfs4_delegreturndata *data;
fa178f29 5407 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5408 struct rpc_task *task;
5138fde0
TM		 5409 struct rpc_message msg = {
5410 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5411 .rpc_cred = cred,
5412 };
c970aa85
TM		 5413 struct rpc_task_setup task_setup_data = {
5414 .rpc_client = server->client,
5138fde0 5415 .rpc_message = &msg,
c970aa85
TM		 5416 .callback_ops = &nfs4_delegreturn_ops,
5417 .flags = RPC_TASK_ASYNC,
5418 };
e6f81075 5419 int status = 0;
fe650407 5420
8535b2be 5421 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5422 if (data == NULL)
5423 return -ENOMEM;
a9c92d6b 5424 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
99ade3c7
AE		 5425
5426 nfs4_state_protect(server->nfs_client,
5427 NFS_SP4_MACH_CRED_CLEANUP,
5428 &task_setup_data.rpc_client, &msg);
5429
fe650407
TM		 5430 data->args.fhandle = &data->fh;
5431 data->args.stateid = &data->stateid;
9e907fec 5432 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5433 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5434 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5435 data->res.fattr = &data->fattr;
5436 data->res.server = server;
5138fde0 5437 nfs_fattr_init(data->res.fattr);
26e976a8 5438 data->timestamp = jiffies;
fe650407 5439 data->rpc_status = 0;
ea7c38fe
TM		 5440 data->inode = nfs_igrab_and_active(inode);
5441 if (data->inode)
5442 data->roc = nfs4_roc(inode);
fe650407 5443
c970aa85 5444 task_setup_data.callback_data = data;
1174dd1f
TM		 5445 msg.rpc_argp = &data->args;
5446 msg.rpc_resp = &data->res;
c970aa85 5447 task = rpc_run_task(&task_setup_data);
7a1218a2 5448 if (IS_ERR(task))
fe650407 5449 return PTR_ERR(task);
e6f81075
TM		 5450 if (!issync)
5451 goto out;
fe650407 5452 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5453 if (status != 0)
5454 goto out;
5455 status = data->rpc_status;
e144cbcc
TM		 5456 if (status == 0)
5457 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5458 else
5459 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5460out:
e6b3c4db 5461 rpc_put_task(task);
fe650407 5462 return status;
1da177e4
LT		 5463}
5464
e6f81075 5465int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5466{
5467 struct nfs_server *server = NFS_SERVER(inode);
5468 struct nfs4_exception exception = { };
5469 int err;
5470 do {
e6f81075 5471 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
48c9579a 5472 trace_nfs4_delegreturn(inode, stateid, err);
1da177e4
LT		 5473 switch (err) {
5474 case -NFS4ERR_STALE_STATEID:
5475 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5476 case 0:
5477 return 0;
5478 }
5479 err = nfs4_handle_exception(server, err, &exception);
5480 } while (exception.retry);
5481 return err;
5482}
5483
5484#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5485#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5486
5487/*
5488 * sleep, with exponential backoff, and retry the LOCK operation.
5489 */
5490static unsigned long
5491nfs4_set_lock_task_retry(unsigned long timeout)
5492{
416ad3c9 5493 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5494 timeout <<= 1;
5495 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5496 return NFS4_LOCK_MAXTIMEOUT;
5497 return timeout;
5498}
5499
1da177e4
LT		 5500static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5501{
5502 struct inode *inode = state->inode;
5503 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5504 struct nfs_client *clp = server->nfs_client;
911d1aaf 5505 struct nfs_lockt_args arg = {
1da177e4 5506 .fh = NFS_FH(inode),
911d1aaf 5507 .fl = request,
1da177e4 5508 };
911d1aaf
TM		 5509 struct nfs_lockt_res res = {
5510 .denied = request,
1da177e4
LT		 5511 };
5512 struct rpc_message msg = {
5513 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5514 .rpc_argp = &arg,
5515 .rpc_resp = &res,
5516 .rpc_cred = state->owner->so_cred,
5517 };
1da177e4
LT		 5518 struct nfs4_lock_state *lsp;
5519 int status;
5520
911d1aaf 5521 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5522 status = nfs4_set_lock_state(state, request);
5523 if (status != 0)
5524 goto out;
5525 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5526 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5527 arg.lock_owner.s_dev = server->s_dev;
7c513058 5528 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5529 switch (status) {
5530 case 0:
5531 request->fl_type = F_UNLCK;
5532 break;
5533 case -NFS4ERR_DENIED:
5534 status = 0;
1da177e4 5535 }
70cc6487 5536 request->fl_ops->fl_release_private(request);
a6f951dd 5537 request->fl_ops = NULL;
8d0a8a9d 5538out:
1da177e4
LT		 5539 return status;
5540}
5541
5542static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5543{
5544 struct nfs4_exception exception = { };
5545 int err;
5546
5547 do {
d1b748a5
TM		 5548 err = _nfs4_proc_getlk(state, cmd, request);
5549 trace_nfs4_get_lock(request, state, cmd, err);
5550 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5551 &exception);
5552 } while (exception.retry);
5553 return err;
5554}
5555
83bfff23 5556static int do_vfs_lock(struct inode *inode, struct file_lock *fl)
1da177e4 5557{
4f656367 5558 return locks_lock_inode_wait(inode, fl);
1da177e4
LT		 5559}
5560
faf5f49c 5561struct nfs4_unlockdata {
911d1aaf
TM		 5562 struct nfs_locku_args arg;
5563 struct nfs_locku_res res;
faf5f49c
TM		 5564 struct nfs4_lock_state *lsp;
5565 struct nfs_open_context *ctx;
911d1aaf 5566 struct file_lock fl;
516285eb 5567 struct nfs_server *server;
26e976a8 5568 unsigned long timestamp;
faf5f49c
TM		 5569};
5570
911d1aaf
TM		 5571static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5572 struct nfs_open_context *ctx,
5573 struct nfs4_lock_state *lsp,
5574 struct nfs_seqid *seqid)
5575{
5576 struct nfs4_unlockdata *p;
5577 struct inode *inode = lsp->ls_state->inode;
5578
8535b2be 5579 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5580 if (p == NULL)
5581 return NULL;
5582 p->arg.fh = NFS_FH(inode);
5583 p->arg.fl = &p->fl;
5584 p->arg.seqid = seqid;
c1d51931 5585 p->res.seqid = seqid;
911d1aaf
TM		 5586 p->lsp = lsp;
5587 atomic_inc(&lsp->ls_count);
5588 /* Ensure we don't close file until we're done freeing locks! */
5589 p->ctx = get_nfs_open_context(ctx);
5590 memcpy(&p->fl, fl, sizeof(p->fl));
5591 p->server = NFS_SERVER(inode);
5592 return p;
5593}
5594
06f814a3 5595static void nfs4_locku_release_calldata(void *data)
faf5f49c 5596{
963d8fe5 5597 struct nfs4_unlockdata *calldata = data;
911d1aaf 5598 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5599 nfs4_put_lock_state(calldata->lsp);
5600 put_nfs_open_context(calldata->ctx);
5601 kfree(calldata);
faf5f49c
TM		 5602}
5603
963d8fe5 5604static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5605{
963d8fe5 5606 struct nfs4_unlockdata *calldata = data;
faf5f49c 5607
14516c3a
TM		 5608 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5609 return;
faf5f49c
TM		 5610 switch (task->tk_status) {
5611 case 0:
26e976a8 5612 renew_lease(calldata->server, calldata->timestamp);
83bfff23 5613 do_vfs_lock(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 5614 if (nfs4_update_lock_stateid(calldata->lsp,
5615 &calldata->res.stateid))
5616 break;
9e33bed5
TM		 5617 case -NFS4ERR_BAD_STATEID:
5618 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5619 case -NFS4ERR_STALE_STATEID:
5620 case -NFS4ERR_EXPIRED:
425c1d4e
TM		 5621 if (!nfs4_stateid_match(&calldata->arg.stateid,
5622 &calldata->lsp->ls_stateid))
5623 rpc_restart_call_prepare(task);
faf5f49c
TM		 5624 break;
5625 default:
8478eaa1
N		 5626 if (nfs4_async_handle_error(task, calldata->server,
5627 NULL, NULL) == -EAGAIN)
d00c5d43 5628 rpc_restart_call_prepare(task);
faf5f49c 5629 }
2b1bc308 5630 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5631}
5632
4ce70ada 5633static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5634{
4ce70ada 5635 struct nfs4_unlockdata *calldata = data;
faf5f49c 5636
911d1aaf 5637 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5638 goto out_wait;
425c1d4e 5639 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5640 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5641 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5642 goto out_no_action;
faf5f49c 5643 }
26e976a8 5644 calldata->timestamp = jiffies;
035168ab 5645 if (nfs4_setup_sequence(calldata->server,
a893693c 5646 &calldata->arg.seq_args,
2240a9e2
TM		 5647 &calldata->res.seq_res,
5648 task) != 0)
5649 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5650 return;
5651out_no_action:
5652 task->tk_action = NULL;
5653out_wait:
5654 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5655}
5656
963d8fe5 5657static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5658 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5659 .rpc_call_done = nfs4_locku_done,
06f814a3 5660 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5661};
5662
a5d16a4d
TM		 5663static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5664 struct nfs_open_context *ctx,
5665 struct nfs4_lock_state *lsp,
5666 struct nfs_seqid *seqid)
5667{
5668 struct nfs4_unlockdata *data;
5138fde0
TM		 5669 struct rpc_message msg = {
5670 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5671 .rpc_cred = ctx->cred,
5672 };
c970aa85
TM		 5673 struct rpc_task_setup task_setup_data = {
5674 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5675 .rpc_message = &msg,
c970aa85 5676 .callback_ops = &nfs4_locku_ops,
101070ca 5677 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5678 .flags = RPC_TASK_ASYNC,
5679 };
a5d16a4d 5680
fa940720
WAA		 5681 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5682 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5683
137d6aca
FF		 5684 /* Ensure this is an unlock - when canceling a lock, the
5685 * canceled lock is passed in, and it won't be an unlock.
5686 */
5687 fl->fl_type = F_UNLCK;
5688
a5d16a4d
TM		 5689 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5690 if (data == NULL) {
5691 nfs_free_seqid(seqid);
5692 return ERR_PTR(-ENOMEM);
5693 }
5694
a9c92d6b 5695 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5696 msg.rpc_argp = &data->arg;
5697 msg.rpc_resp = &data->res;
c970aa85
TM		 5698 task_setup_data.callback_data = data;
5699 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5700}
5701
faf5f49c
TM		 5702static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5703{
65b62a29
TM		 5704 struct inode *inode = state->inode;
5705 struct nfs4_state_owner *sp = state->owner;
5706 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5707 struct nfs_seqid *seqid;
1da177e4 5708 struct nfs4_lock_state *lsp;
06f814a3 5709 struct rpc_task *task;
b4019c0e 5710 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 5711 int status = 0;
536ff0f8 5712 unsigned char fl_flags = request->fl_flags;
faf5f49c 5713
8d0a8a9d 5714 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5715 /* Unlock _before_ we do the RPC call */
5716 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5717 /* Exclude nfs_delegation_claim_locks() */
5718 mutex_lock(&sp->so_delegreturn_mutex);
5719 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 5720 down_read(&nfsi->rwsem);
83bfff23 5721 if (do_vfs_lock(inode, request) == -ENOENT) {
19e03c57 5722 up_read(&nfsi->rwsem);
65b62a29 5723 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5724 goto out;
19e03c57
TM		 5725 }
5726 up_read(&nfsi->rwsem);
65b62a29 5727 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5728 if (status != 0)
9b073574
TM		 5729 goto out;
5730 /* Is this a delegated lock? */
8d0a8a9d 5731 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5732 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5733 goto out;
b4019c0e
TM		 5734 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5735 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5736 status = -ENOMEM;
badc76dd 5737 if (IS_ERR(seqid))
9b073574 5738 goto out;
cd3758e3 5739 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5740 status = PTR_ERR(task);
5741 if (IS_ERR(task))
9b073574 5742 goto out;
a5d16a4d 5743 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5744 rpc_put_task(task);
9b073574 5745out:
536ff0f8 5746 request->fl_flags = fl_flags;
d1b748a5 5747 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5748 return status;
5749}
5750
a5d16a4d
TM		 5751struct nfs4_lockdata {
5752 struct nfs_lock_args arg;
5753 struct nfs_lock_res res;
5754 struct nfs4_lock_state *lsp;
5755 struct nfs_open_context *ctx;
5756 struct file_lock fl;
26e976a8 5757 unsigned long timestamp;
a5d16a4d
TM		 5758 int rpc_status;
5759 int cancelled;
66179efe 5760 struct nfs_server *server;
a5d16a4d
TM		 5761};
5762
5763static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5764 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5765 gfp_t gfp_mask)
1da177e4 5766{
a5d16a4d
TM		 5767 struct nfs4_lockdata *p;
5768 struct inode *inode = lsp->ls_state->inode;
1da177e4 5769 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 5770 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 5771
8535b2be 5772 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5773 if (p == NULL)
5774 return NULL;
5775
5776 p->arg.fh = NFS_FH(inode);
5777 p->arg.fl = &p->fl;
8535b2be 5778 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 5779 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 5780 goto out_free;
b4019c0e
TM		 5781 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5782 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 5783 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 5784 goto out_free_seqid;
7539bbab 5785 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5786 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5787 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5788 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5789 p->lsp = lsp;
66179efe 5790 p->server = server;
a5d16a4d
TM		 5791 atomic_inc(&lsp->ls_count);
5792 p->ctx = get_nfs_open_context(ctx);
feaff8e5 5793 get_file(fl->fl_file);
a5d16a4d
TM		 5794 memcpy(&p->fl, fl, sizeof(p->fl));
5795 return p;
2f74c0a0
TM		 5796out_free_seqid:
5797 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5798out_free:
5799 kfree(p);
5800 return NULL;
5801}
5802
5803static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5804{
5805 struct nfs4_lockdata *data = calldata;
5806 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5807
3110ff80 5808 dprintk("%s: begin!\n", __func__);
2f74c0a0 5809 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5810 goto out_wait;
a5d16a4d 5811 /* Do we need to do an open_to_lock_owner? */
6b447539 5812 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 5813 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5814 goto out_release_lock_seqid;
8fe72bac 5815 }
425c1d4e
TM		 5816 nfs4_stateid_copy(&data->arg.open_stateid,
5817 &state->open_stateid);
a5d16a4d 5818 data->arg.new_lock_owner = 1;
c1d51931 5819 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 5820 } else {
2f74c0a0 5821 data->arg.new_lock_owner = 0;
425c1d4e
TM		 5822 nfs4_stateid_copy(&data->arg.lock_stateid,
5823 &data->lsp->ls_stateid);
5824 }
5d422301
TM		 5825 if (!nfs4_valid_open_stateid(state)) {
5826 data->rpc_status = -EBADF;
5827 task->tk_action = NULL;
5828 goto out_release_open_seqid;
5829 }
26e976a8 5830 data->timestamp = jiffies;
035168ab
TM		 5831 if (nfs4_setup_sequence(data->server,
5832 &data->arg.seq_args,
2240a9e2 5833 &data->res.seq_res,
d9afbd1b 5834 task) == 0)
66179efe 5835 return;
5d422301 5836out_release_open_seqid:
2240a9e2
TM		 5837 nfs_release_seqid(data->arg.open_seqid);
5838out_release_lock_seqid:
5839 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5840out_wait:
5841 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5842 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5843}
5844
a5d16a4d
TM		 5845static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5846{
5847 struct nfs4_lockdata *data = calldata;
39071e6f 5848 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 5849
3110ff80 5850 dprintk("%s: begin!\n", __func__);
a5d16a4d 5851
14516c3a
TM		 5852 if (!nfs4_sequence_done(task, &data->res.seq_res))
5853 return;
66179efe 5854
a5d16a4d 5855 data->rpc_status = task->tk_status;
425c1d4e
TM		 5856 switch (task->tk_status) {
5857 case 0:
2b0143b5 5858 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 5859 data->timestamp);
c69899a1
TM		 5860 if (data->arg.new_lock) {
5861 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
83bfff23 5862 if (do_vfs_lock(lsp->ls_state->inode, &data->fl) < 0) {
c69899a1
TM		 5863 rpc_restart_call_prepare(task);
5864 break;
5865 }
5866 }
39071e6f
TM		 5867 if (data->arg.new_lock_owner != 0) {
5868 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5869 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5870 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5871 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5872 rpc_restart_call_prepare(task);
425c1d4e
TM		 5873 break;
5874 case -NFS4ERR_BAD_STATEID:
5875 case -NFS4ERR_OLD_STATEID:
5876 case -NFS4ERR_STALE_STATEID:
5877 case -NFS4ERR_EXPIRED:
5878 if (data->arg.new_lock_owner != 0) {
5879 if (!nfs4_stateid_match(&data->arg.open_stateid,
5880 &lsp->ls_state->open_stateid))
5881 rpc_restart_call_prepare(task);
5882 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5883 &lsp->ls_stateid))
5884 rpc_restart_call_prepare(task);
a5d16a4d 5885 }
3110ff80 5886 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5887}
5888
5889static void nfs4_lock_release(void *calldata)
5890{
5891 struct nfs4_lockdata *data = calldata;
5892
3110ff80 5893 dprintk("%s: begin!\n", __func__);
2f74c0a0 5894 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5895 if (data->cancelled != 0) {
5896 struct rpc_task *task;
5897 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5898 data->arg.lock_seqid);
5899 if (!IS_ERR(task))
bf294b41 5900 rpc_put_task_async(task);
3110ff80 5901 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5902 } else
5903 nfs_free_seqid(data->arg.lock_seqid);
5904 nfs4_put_lock_state(data->lsp);
5905 put_nfs_open_context(data->ctx);
feaff8e5 5906 fput(data->fl.fl_file);
a5d16a4d 5907 kfree(data);
3110ff80 5908 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5909}
5910
5911static const struct rpc_call_ops nfs4_lock_ops = {
5912 .rpc_call_prepare = nfs4_lock_prepare,
5913 .rpc_call_done = nfs4_lock_done,
5914 .rpc_release = nfs4_lock_release,
5915};
5916
2bee72a6
TM		 5917static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5918{
2bee72a6
TM		 5919 switch (error) {
5920 case -NFS4ERR_ADMIN_REVOKED:
5921 case -NFS4ERR_BAD_STATEID:
ecac799a 5922 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5923 if (new_lock_owner != 0 ||
795a88c9 5924 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5925 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5926 break;
5927 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5928 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5929 case -NFS4ERR_EXPIRED:
5930 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5931 };
5932}
5933
afe6c27c 5934static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5935{
5936 struct nfs4_lockdata *data;
5937 struct rpc_task *task;
5138fde0
TM		 5938 struct rpc_message msg = {
5939 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5940 .rpc_cred = state->owner->so_cred,
5941 };
c970aa85
TM		 5942 struct rpc_task_setup task_setup_data = {
5943 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5944 .rpc_message = &msg,
c970aa85 5945 .callback_ops = &nfs4_lock_ops,
101070ca 5946 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5947 .flags = RPC_TASK_ASYNC,
5948 };
a5d16a4d
TM		 5949 int ret;
5950
3110ff80 5951 dprintk("%s: begin!\n", __func__);
cd3758e3 5952 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5953 fl->fl_u.nfs4_fl.owner,
5954 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5955 if (data == NULL)
5956 return -ENOMEM;
5957 if (IS_SETLKW(cmd))
5958 data->arg.block = 1;
a9c92d6b 5959 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5960 msg.rpc_argp = &data->arg;
5961 msg.rpc_resp = &data->res;
c970aa85 5962 task_setup_data.callback_data = data;
8fe72bac
TM		 5963 if (recovery_type > NFS_LOCK_NEW) {
5964 if (recovery_type == NFS_LOCK_RECLAIM)
5965 data->arg.reclaim = NFS_LOCK_RECLAIM;
5966 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 5967 } else
5968 data->arg.new_lock = 1;
c970aa85 5969 task = rpc_run_task(&task_setup_data);
7a1218a2 5970 if (IS_ERR(task))
a5d16a4d 5971 return PTR_ERR(task);
a5d16a4d
TM		 5972 ret = nfs4_wait_for_completion_rpc_task(task);
5973 if (ret == 0) {
5974 ret = data->rpc_status;
2bee72a6
TM		 5975 if (ret)
5976 nfs4_handle_setlk_error(data->server, data->lsp,
5977 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5978 } else
5979 data->cancelled = 1;
e6b3c4db 5980 rpc_put_task(task);
3110ff80 5981 dprintk("%s: done, ret = %d!\n", __func__, ret);
48c9579a 5982 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
a5d16a4d 5983 return ret;
1da177e4
LT		 5984}
5985
5986static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5987{
202b50dc 5988 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5989 struct nfs4_exception exception = {
5990 .inode = state->inode,
5991 };
202b50dc
TM		 5992 int err;
5993
5994 do {
42a2d13e
TM		 5995 /* Cache the lock if possible... */
5996 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5997 return 0;
afe6c27c 5998 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 5999 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 6000 break;
6001 nfs4_handle_exception(server, err, &exception);
6002 } while (exception.retry);
6003 return err;
1da177e4
LT		 6004}
6005
6006static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
6007{
202b50dc 6008 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6009 struct nfs4_exception exception = {
6010 .inode = state->inode,
6011 };
202b50dc
TM		 6012 int err;
6013
6bfc93ef
TM		 6014 err = nfs4_set_lock_state(state, request);
6015 if (err != 0)
6016 return err;
f6de7a39 6017 if (!recover_lost_locks) {
ef1820f9
N		 6018 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
6019 return 0;
6020 }
202b50dc 6021 do {
42a2d13e
TM		 6022 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6023 return 0;
afe6c27c 6024 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 6025 switch (err) {
6026 default:
6027 goto out;
6028 case -NFS4ERR_GRACE:
6029 case -NFS4ERR_DELAY:
6030 nfs4_handle_exception(server, err, &exception);
6031 err = 0;
6032 }
202b50dc 6033 } while (exception.retry);
a9ed2e25 6034out:
202b50dc 6035 return err;
1da177e4
LT		 6036}
6037
f062eb6c 6038#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 6039/**
6040 * nfs41_check_expired_locks - possibly free a lock stateid
6041 *
6042 * @state: NFSv4 state for an inode
6043 *
6044 * Returns NFS_OK if recovery for this stateid is now finished.
6045 * Otherwise a negative NFS4ERR value is returned.
6046 */
b01dd1d8 6047static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 6048{
eb64cf96 6049 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 6050 struct nfs4_lock_state *lsp;
f062eb6c
BS		 6051 struct nfs_server *server = NFS_SERVER(state->inode);
6052
b01dd1d8 6053 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 6054 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 6055 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
6056
6057 status = nfs41_test_stateid(server,
6058 &lsp->ls_stateid,
6059 cred);
08cb47fa 6060 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 6061 if (status != NFS_OK) {
3e60ffdd
CL		 6062 /* Free the stateid unless the server
6063 * informs us the stateid is unrecognized. */
89af2739
CL		 6064 if (status != -NFS4ERR_BAD_STATEID)
6065 nfs41_free_stateid(server,
ab7cb0df
TM		 6066 &lsp->ls_stateid,
6067 cred);
795a88c9 6068 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 6069 ret = status;
6070 }
6071 }
6072 };
6073
6074 return ret;
6075}
6076
6077static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6078{
6079 int status = NFS_OK;
6080
6081 if (test_bit(LK_STATE_IN_USE, &state->flags))
6082 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 6083 if (status != NFS_OK)
6084 status = nfs4_lock_expired(state, request);
6085 return status;
f062eb6c
BS		 6086}
6087#endif
6088
1da177e4
LT		 6089static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6090{
19e03c57 6091 struct nfs_inode *nfsi = NFS_I(state->inode);
11476e9d 6092 struct nfs4_state_owner *sp = state->owner;
01c3b861 6093 unsigned char fl_flags = request->fl_flags;
8e469ebd 6094 int status = -ENOLCK;
1da177e4 6095
8e469ebd
TM		 6096 if ((fl_flags & FL_POSIX) &&
6097 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6098 goto out;
6bfc93ef 6099 /* Is this a delegated open? */
6bfc93ef
TM		 6100 status = nfs4_set_lock_state(state, request);
6101 if (status != 0)
6102 goto out;
01c3b861 6103 request->fl_flags |= FL_ACCESS;
83bfff23 6104 status = do_vfs_lock(state->inode, request);
01c3b861
TM		 6105 if (status < 0)
6106 goto out;
11476e9d 6107 mutex_lock(&sp->so_delegreturn_mutex);
19e03c57 6108 down_read(&nfsi->rwsem);
01c3b861 6109 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6110 /* Yes: cache locks! */
01c3b861 6111 /* ...but avoid races with delegation recall... */
19e03c57 6112 request->fl_flags = fl_flags & ~FL_SLEEP;
83bfff23 6113 status = do_vfs_lock(state->inode, request);
c69899a1 6114 up_read(&nfsi->rwsem);
11476e9d 6115 mutex_unlock(&sp->so_delegreturn_mutex);
9a99af49 6116 goto out;
9a99af49 6117 }
19e03c57 6118 up_read(&nfsi->rwsem);
11476e9d 6119 mutex_unlock(&sp->so_delegreturn_mutex);
c69899a1 6120 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6121out:
6122 request->fl_flags = fl_flags;
1da177e4
LT		 6123 return status;
6124}
6125
6126static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6127{
a1d0b5ee
TM		 6128 struct nfs4_exception exception = {
6129 .state = state,
05ffe24f 6130 .inode = state->inode,
a1d0b5ee 6131 };
1da177e4
LT		 6132 int err;
6133
6134 do {
965b5d67
TM		 6135 err = _nfs4_proc_setlk(state, cmd, request);
6136 if (err == -NFS4ERR_DENIED)
6137 err = -EAGAIN;
1da177e4 6138 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6139 err, &exception);
1da177e4
LT		 6140 } while (exception.retry);
6141 return err;
6142}
6143
6144static int
6145nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6146{
6147 struct nfs_open_context *ctx;
6148 struct nfs4_state *state;
6149 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6150 int status;
6151
6152 /* verify open state */
cd3758e3 6153 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6154 state = ctx->state;
6155
6156 if (request->fl_start < 0 || request->fl_end < 0)
6157 return -EINVAL;
6158
d953126a
TM		 6159 if (IS_GETLK(cmd)) {
6160 if (state != NULL)
6161 return nfs4_proc_getlk(state, F_GETLK, request);
6162 return 0;
6163 }
1da177e4
LT		 6164
6165 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6166 return -EINVAL;
6167
d953126a
TM		 6168 if (request->fl_type == F_UNLCK) {
6169 if (state != NULL)
6170 return nfs4_proc_unlck(state, cmd, request);
6171 return 0;
6172 }
1da177e4 6173
d953126a
TM		 6174 if (state == NULL)
6175 return -ENOLCK;
55725513
TM		 6176 /*
6177 * Don't rely on the VFS having checked the file open mode,
6178 * since it won't do this for flock() locks.
6179 */
f44106e2 6180 switch (request->fl_type) {
55725513
TM		 6181 case F_RDLCK:
6182 if (!(filp->f_mode & FMODE_READ))
6183 return -EBADF;
6184 break;
6185 case F_WRLCK:
6186 if (!(filp->f_mode & FMODE_WRITE))
6187 return -EBADF;
6188 }
6189
1da177e4
LT		 6190 do {
6191 status = nfs4_proc_setlk(state, cmd, request);
6192 if ((status != -EAGAIN) || IS_SETLK(cmd))
6193 break;
6194 timeout = nfs4_set_lock_task_retry(timeout);
6195 status = -ERESTARTSYS;
6196 if (signalled())
6197 break;
6198 } while(status < 0);
1da177e4
LT		 6199 return status;
6200}
6201
db4f2e63 6202int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6203{
6204 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6205 int err;
6206
6207 err = nfs4_set_lock_state(state, fl);
6208 if (err != 0)
db4f2e63 6209 return err;
4a706fa0 6210 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6211 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6212}
6b3b5496 6213
cf470c3e
TM		 6214struct nfs_release_lockowner_data {
6215 struct nfs4_lock_state *lsp;
5ae67c4f 6216 struct nfs_server *server;
cf470c3e 6217 struct nfs_release_lockowner_args args;
b7e63a10 6218 struct nfs_release_lockowner_res res;
60ea6812 6219 unsigned long timestamp;
cf470c3e
TM		 6220};
6221
fbd4bfd1
CL		 6222static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6223{
6224 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6225 struct nfs_server *server = data->server;
cb04ad2a
PT		 6226 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6227 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6228 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6229 data->timestamp = jiffies;
fbd4bfd1
CL		 6230}
6231
6232static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6233{
6234 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6235 struct nfs_server *server = data->server;
6236
b7e63a10 6237 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6238
6239 switch (task->tk_status) {
6240 case 0:
6241 renew_lease(server, data->timestamp);
6242 break;
6243 case -NFS4ERR_STALE_CLIENTID:
6244 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6245 nfs4_schedule_lease_recovery(server->nfs_client);
6246 break;
60ea6812
CL		 6247 case -NFS4ERR_LEASE_MOVED:
6248 case -NFS4ERR_DELAY:
8478eaa1
N		 6249 if (nfs4_async_handle_error(task, server,
6250 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6251 rpc_restart_call_prepare(task);
6252 }
fbd4bfd1
CL		 6253}
6254
d3c7b7cc
TM		 6255static void nfs4_release_lockowner_release(void *calldata)
6256{
cf470c3e 6257 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6258 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6259 kfree(calldata);
6260}
6261
17280175 6262static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6263 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6264 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6265 .rpc_release = nfs4_release_lockowner_release,
6266};
6267
f1cdae87
JL		 6268static void
6269nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6270{
cf470c3e 6271 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6272 struct rpc_message msg = {
6273 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6274 };
6275
6276 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6277 return;
fbd4bfd1 6278
cf470c3e
TM		 6279 data = kmalloc(sizeof(*data), GFP_NOFS);
6280 if (!data)
f1cdae87 6281 return;
cf470c3e 6282 data->lsp = lsp;
5ae67c4f 6283 data->server = server;
cf470c3e
TM		 6284 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6285 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6286 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6287
cf470c3e 6288 msg.rpc_argp = &data->args;
b7e63a10
TM		 6289 msg.rpc_resp = &data->res;
6290 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6291 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6292}
6293
aa1870af
BF		 6294#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6295
d9a82a04 6296static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
59301226
AV		 6297 struct dentry *unused, struct inode *inode,
6298 const char *key, const void *buf,
6299 size_t buflen, int flags)
6b3b5496 6300{
59301226 6301 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 6302}
6303
d9a82a04 6304static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
b296821a
AV		 6305 struct dentry *unused, struct inode *inode,
6306 const char *key, void *buf, size_t buflen)
6b3b5496 6307{
b296821a 6308 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 6309}
6310
764a5c6b 6311static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6b3b5496 6312{
764a5c6b 6313 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6b3b5496
BF		 6314}
6315
c9bccef6 6316#ifdef CONFIG_NFS_V4_SECURITY_LABEL
c9bccef6 6317
d9a82a04 6318static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
59301226
AV		 6319 struct dentry *unused, struct inode *inode,
6320 const char *key, const void *buf,
6321 size_t buflen, int flags)
c9bccef6
DQ		 6322{
6323 if (security_ismaclabel(key))
59301226 6324 return nfs4_set_security_label(inode, buf, buflen);
c9bccef6
DQ		 6325
6326 return -EOPNOTSUPP;
6327}
6328
d9a82a04 6329static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
b296821a
AV		 6330 struct dentry *unused, struct inode *inode,
6331 const char *key, void *buf, size_t buflen)
c9bccef6
DQ		 6332{
6333 if (security_ismaclabel(key))
b296821a 6334 return nfs4_get_security_label(inode, buf, buflen);
c9bccef6
DQ		 6335 return -EOPNOTSUPP;
6336}
6337
c4803c49
AG		 6338static ssize_t
6339nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
c9bccef6 6340{
c4803c49 6341 int len = 0;
c9bccef6 6342
c4803c49
AG		 6343 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
6344 len = security_inode_listsecurity(inode, list, list_len);
6345 if (list_len && len > list_len)
6346 return -ERANGE;
c9bccef6
DQ		 6347 }
6348 return len;
6349}
6350
6351static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6352 .prefix = XATTR_SECURITY_PREFIX,
c9bccef6
DQ		 6353 .get = nfs4_xattr_get_nfs4_label,
6354 .set = nfs4_xattr_set_nfs4_label,
6355};
c9bccef6 6356
c4803c49
AG		 6357#else
6358
6359static ssize_t
6360nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6361{
6362 return 0;
6363}
6364
6365#endif
c9bccef6 6366
533eb461
AA		 6367/*
6368 * nfs_fhget will use either the mounted_on_fileid or the fileid
6369 */
69aaaae1
TM		 6370static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6371{
533eb461
AA		 6372 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6373 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6374 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6375 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6376 return;
6377
6378 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6379 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6380 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6381 fattr->nlink = 2;
6382}
6383
f05d147f
BS		 6384static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6385 const struct qstr *name,
6386 struct nfs4_fs_locations *fs_locations,
6387 struct page *page)
683b57b4
TM		 6388{
6389 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6390 u32 bitmask[3] = {
361e624f 6391 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6392 };
6393 struct nfs4_fs_locations_arg args = {
6394 .dir_fh = NFS_FH(dir),
c228fd3a 6395 .name = name,
683b57b4
TM		 6396 .page = page,
6397 .bitmask = bitmask,
6398 };
22958463
BH		 6399 struct nfs4_fs_locations_res res = {
6400 .fs_locations = fs_locations,
6401 };
683b57b4
TM		 6402 struct rpc_message msg = {
6403 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6404 .rpc_argp = &args,
22958463 6405 .rpc_resp = &res,
683b57b4
TM		 6406 };
6407 int status;
6408
3110ff80 6409 dprintk("%s: start\n", __func__);
533eb461
AA		 6410
6411 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6412 * is not supported */
6413 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6414 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6415 else
6416 bitmask[0] |= FATTR4_WORD0_FILEID;
6417
c228fd3a 6418 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6419 fs_locations->server = server;
830b8e33 6420 fs_locations->nlocations = 0;
f05d147f 6421 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6422 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6423 return status;
6424}
6425
f05d147f
BS		 6426int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6427 const struct qstr *name,
6428 struct nfs4_fs_locations *fs_locations,
6429 struct page *page)
db0a9593
BS		 6430{
6431 struct nfs4_exception exception = { };
6432 int err;
6433 do {
078ea3df
TM		 6434 err = _nfs4_proc_fs_locations(client, dir, name,
6435 fs_locations, page);
6436 trace_nfs4_get_fs_locations(dir, name, err);
6437 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6438 &exception);
6439 } while (exception.retry);
6440 return err;
6441}
6442
b03d735b
CL		 6443/*
6444 * This operation also signals the server that this client is
6445 * performing migration recovery. The server can stop returning
6446 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6447 * appended to this compound to identify the client ID which is
6448 * performing recovery.
6449 */
6450static int _nfs40_proc_get_locations(struct inode *inode,
6451 struct nfs4_fs_locations *locations,
6452 struct page *page, struct rpc_cred *cred)
6453{
6454 struct nfs_server *server = NFS_SERVER(inode);
6455 struct rpc_clnt *clnt = server->client;
6456 u32 bitmask[2] = {
6457 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6458 };
6459 struct nfs4_fs_locations_arg args = {
6460 .clientid = server->nfs_client->cl_clientid,
6461 .fh = NFS_FH(inode),
6462 .page = page,
6463 .bitmask = bitmask,
6464 .migration = 1, /* skip LOOKUP */
6465 .renew = 1, /* append RENEW */
6466 };
6467 struct nfs4_fs_locations_res res = {
6468 .fs_locations = locations,
6469 .migration = 1,
6470 .renew = 1,
6471 };
6472 struct rpc_message msg = {
6473 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6474 .rpc_argp = &args,
6475 .rpc_resp = &res,
6476 .rpc_cred = cred,
6477 };
6478 unsigned long now = jiffies;
6479 int status;
6480
6481 nfs_fattr_init(&locations->fattr);
6482 locations->server = server;
6483 locations->nlocations = 0;
6484
6485 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6486 nfs4_set_sequence_privileged(&args.seq_args);
6487 status = nfs4_call_sync_sequence(clnt, server, &msg,
6488 &args.seq_args, &res.seq_res);
6489 if (status)
6490 return status;
6491
6492 renew_lease(server, now);
6493 return 0;
6494}
6495
6496#ifdef CONFIG_NFS_V4_1
6497
6498/*
6499 * This operation also signals the server that this client is
6500 * performing migration recovery. The server can stop asserting
6501 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6502 * performing this operation is identified in the SEQUENCE
6503 * operation in this compound.
6504 *
6505 * When the client supports GETATTR(fs_locations_info), it can
6506 * be plumbed in here.
6507 */
6508static int _nfs41_proc_get_locations(struct inode *inode,
6509 struct nfs4_fs_locations *locations,
6510 struct page *page, struct rpc_cred *cred)
6511{
6512 struct nfs_server *server = NFS_SERVER(inode);
6513 struct rpc_clnt *clnt = server->client;
6514 u32 bitmask[2] = {
6515 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6516 };
6517 struct nfs4_fs_locations_arg args = {
6518 .fh = NFS_FH(inode),
6519 .page = page,
6520 .bitmask = bitmask,
6521 .migration = 1, /* skip LOOKUP */
6522 };
6523 struct nfs4_fs_locations_res res = {
6524 .fs_locations = locations,
6525 .migration = 1,
6526 };
6527 struct rpc_message msg = {
6528 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6529 .rpc_argp = &args,
6530 .rpc_resp = &res,
6531 .rpc_cred = cred,
6532 };
6533 int status;
6534
6535 nfs_fattr_init(&locations->fattr);
6536 locations->server = server;
6537 locations->nlocations = 0;
6538
6539 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6540 nfs4_set_sequence_privileged(&args.seq_args);
6541 status = nfs4_call_sync_sequence(clnt, server, &msg,
6542 &args.seq_args, &res.seq_res);
6543 if (status == NFS4_OK &&
6544 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6545 status = -NFS4ERR_LEASE_MOVED;
6546 return status;
6547}
6548
6549#endif /* CONFIG_NFS_V4_1 */
6550
6551/**
6552 * nfs4_proc_get_locations - discover locations for a migrated FSID
6553 * @inode: inode on FSID that is migrating
6554 * @locations: result of query
6555 * @page: buffer
6556 * @cred: credential to use for this operation
6557 *
6558 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6559 * operation failed, or a negative errno if a local error occurred.
6560 *
6561 * On success, "locations" is filled in, but if the server has
6562 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6563 * asserted.
6564 *
6565 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6566 * from this client that require migration recovery.
6567 */
6568int nfs4_proc_get_locations(struct inode *inode,
6569 struct nfs4_fs_locations *locations,
6570 struct page *page, struct rpc_cred *cred)
6571{
6572 struct nfs_server *server = NFS_SERVER(inode);
6573 struct nfs_client *clp = server->nfs_client;
6574 const struct nfs4_mig_recovery_ops *ops =
6575 clp->cl_mvops->mig_recovery_ops;
6576 struct nfs4_exception exception = { };
6577 int status;
6578
6579 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6580 (unsigned long long)server->fsid.major,
6581 (unsigned long long)server->fsid.minor,
6582 clp->cl_hostname);
6583 nfs_display_fhandle(NFS_FH(inode), __func__);
6584
6585 do {
6586 status = ops->get_locations(inode, locations, page, cred);
6587 if (status != -NFS4ERR_DELAY)
6588 break;
6589 nfs4_handle_exception(server, status, &exception);
6590 } while (exception.retry);
6591 return status;
6592}
6593
44c99933
CL		 6594/*
6595 * This operation also signals the server that this client is
6596 * performing "lease moved" recovery. The server can stop
6597 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6598 * is appended to this compound to identify the client ID which is
6599 * performing recovery.
6600 */
6601static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6602{
6603 struct nfs_server *server = NFS_SERVER(inode);
6604 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6605 struct rpc_clnt *clnt = server->client;
6606 struct nfs4_fsid_present_arg args = {
6607 .fh = NFS_FH(inode),
6608 .clientid = clp->cl_clientid,
6609 .renew = 1, /* append RENEW */
6610 };
6611 struct nfs4_fsid_present_res res = {
6612 .renew = 1,
6613 };
6614 struct rpc_message msg = {
6615 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6616 .rpc_argp = &args,
6617 .rpc_resp = &res,
6618 .rpc_cred = cred,
6619 };
6620 unsigned long now = jiffies;
6621 int status;
6622
6623 res.fh = nfs_alloc_fhandle();
6624 if (res.fh == NULL)
6625 return -ENOMEM;
6626
6627 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6628 nfs4_set_sequence_privileged(&args.seq_args);
6629 status = nfs4_call_sync_sequence(clnt, server, &msg,
6630 &args.seq_args, &res.seq_res);
6631 nfs_free_fhandle(res.fh);
6632 if (status)
6633 return status;
6634
6635 do_renew_lease(clp, now);
6636 return 0;
6637}
6638
6639#ifdef CONFIG_NFS_V4_1
6640
6641/*
6642 * This operation also signals the server that this client is
6643 * performing "lease moved" recovery. The server can stop asserting
6644 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6645 * this operation is identified in the SEQUENCE operation in this
6646 * compound.
6647 */
6648static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6649{
6650 struct nfs_server *server = NFS_SERVER(inode);
6651 struct rpc_clnt *clnt = server->client;
6652 struct nfs4_fsid_present_arg args = {
6653 .fh = NFS_FH(inode),
6654 };
6655 struct nfs4_fsid_present_res res = {
6656 };
6657 struct rpc_message msg = {
6658 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6659 .rpc_argp = &args,
6660 .rpc_resp = &res,
6661 .rpc_cred = cred,
6662 };
6663 int status;
6664
6665 res.fh = nfs_alloc_fhandle();
6666 if (res.fh == NULL)
6667 return -ENOMEM;
6668
6669 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6670 nfs4_set_sequence_privileged(&args.seq_args);
6671 status = nfs4_call_sync_sequence(clnt, server, &msg,
6672 &args.seq_args, &res.seq_res);
6673 nfs_free_fhandle(res.fh);
6674 if (status == NFS4_OK &&
6675 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6676 status = -NFS4ERR_LEASE_MOVED;
6677 return status;
6678}
6679
6680#endif /* CONFIG_NFS_V4_1 */
6681
6682/**
6683 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6684 * @inode: inode on FSID to check
6685 * @cred: credential to use for this operation
6686 *
6687 * Server indicates whether the FSID is present, moved, or not
6688 * recognized. This operation is necessary to clear a LEASE_MOVED
6689 * condition for this client ID.
6690 *
6691 * Returns NFS4_OK if the FSID is present on this server,
6692 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6693 * NFS4ERR code if some error occurred on the server, or a
6694 * negative errno if a local failure occurred.
6695 */
6696int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6697{
6698 struct nfs_server *server = NFS_SERVER(inode);
6699 struct nfs_client *clp = server->nfs_client;
6700 const struct nfs4_mig_recovery_ops *ops =
6701 clp->cl_mvops->mig_recovery_ops;
6702 struct nfs4_exception exception = { };
6703 int status;
6704
6705 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6706 (unsigned long long)server->fsid.major,
6707 (unsigned long long)server->fsid.minor,
6708 clp->cl_hostname);
6709 nfs_display_fhandle(NFS_FH(inode), __func__);
6710
6711 do {
6712 status = ops->fsid_present(inode, cred);
6713 if (status != -NFS4ERR_DELAY)
6714 break;
6715 nfs4_handle_exception(server, status, &exception);
6716 } while (exception.retry);
6717 return status;
6718}
6719
5ec16a85 6720/**
a5250def
WAA		 6721 * If 'use_integrity' is true and the state managment nfs_client
6722 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6723 * and the machine credential as per RFC3530bis and RFC5661 Security
6724 * Considerations sections. Otherwise, just use the user cred with the
6725 * filesystem's rpc_client.
5ec16a85 6726 */
a5250def 6727static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6728{
6729 int status;
6730 struct nfs4_secinfo_arg args = {
6731 .dir_fh = NFS_FH(dir),
6732 .name = name,
6733 };
6734 struct nfs4_secinfo_res res = {
6735 .flavors = flavors,
6736 };
6737 struct rpc_message msg = {
6738 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6739 .rpc_argp = &args,
6740 .rpc_resp = &res,
6741 };
a5250def 6742 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6743 struct rpc_cred *cred = NULL;
a5250def
WAA		 6744
6745 if (use_integrity) {
6746 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6747 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6748 msg.rpc_cred = cred;
a5250def 6749 }
5a5ea0d4
BS		 6750
6751 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6752
6753 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6754 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6755
a5250def
WAA		 6756 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6757 &res.seq_res, 0);
5a5ea0d4 6758 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6759
7cb852df
WAA		 6760 if (cred)
6761 put_rpccred(cred);
a5250def 6762
5a5ea0d4
BS		 6763 return status;
6764}
6765
72de53ec
BS		 6766int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6767 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6768{
6769 struct nfs4_exception exception = { };
6770 int err;
6771 do {
a5250def
WAA		 6772 err = -NFS4ERR_WRONGSEC;
6773
6774 /* try to use integrity protection with machine cred */
6775 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6776 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6777
6778 /*
6779 * if unable to use integrity protection, or SECINFO with
6780 * integrity protection returns NFS4ERR_WRONGSEC (which is
6781 * disallowed by spec, but exists in deployed servers) use
6782 * the current filesystem's rpc_client and the user cred.
6783 */
6784 if (err == -NFS4ERR_WRONGSEC)
6785 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6786
078ea3df
TM		 6787 trace_nfs4_secinfo(dir, name, err);
6788 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6789 &exception);
6790 } while (exception.retry);
6791 return err;
6792}
6793
557134a3 6794#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6795/*
6796 * Check the exchange flags returned by the server for invalid flags, having
6797 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6798 * DS flags set.
6799 */
6800static int nfs4_check_cl_exchange_flags(u32 flags)
6801{
6802 if (flags & ~EXCHGID4_FLAG_MASK_R)
6803 goto out_inval;
6804 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6805 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6806 goto out_inval;
6807 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6808 goto out_inval;
6809 return NFS_OK;
6810out_inval:
6811 return -NFS4ERR_INVAL;
6812}
6813
78fe0f41 6814static bool
79d4e1f0
CL		 6815nfs41_same_server_scope(struct nfs41_server_scope *a,
6816 struct nfs41_server_scope *b)
78fe0f41
WAA		 6817{
6818 if (a->server_scope_sz == b->server_scope_sz &&
6819 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6820 return true;
6821
6822 return false;
6823}
6824
02a95dee
AA		 6825static void
6826nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
6827{
6828}
6829
6830static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
6831 .rpc_call_done = &nfs4_bind_one_conn_to_session_done,
6832};
6833
7c44f1ae 6834/*
d9ddbf5d 6835 * nfs4_proc_bind_one_conn_to_session()
7c44f1ae
WAA		 6836 *
6837 * The 4.1 client currently uses the same TCP connection for the
6838 * fore and backchannel.
6839 */
d9ddbf5d
TM		 6840static
6841int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
6842 struct rpc_xprt *xprt,
6843 struct nfs_client *clp,
6844 struct rpc_cred *cred)
7c44f1ae
WAA		 6845{
6846 int status;
71a097c6
TM		 6847 struct nfs41_bind_conn_to_session_args args = {
6848 .client = clp,
6849 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6850 };
7c44f1ae
WAA		 6851 struct nfs41_bind_conn_to_session_res res;
6852 struct rpc_message msg = {
6853 .rpc_proc =
6854 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 6855 .rpc_argp = &args,
7c44f1ae 6856 .rpc_resp = &res,
2cf047c9 6857 .rpc_cred = cred,
7c44f1ae 6858 };
d9ddbf5d
TM		 6859 struct rpc_task_setup task_setup_data = {
6860 .rpc_client = clnt,
6861 .rpc_xprt = xprt,
02a95dee 6862 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
d9ddbf5d
TM		 6863 .rpc_message = &msg,
6864 .flags = RPC_TASK_TIMEOUT,
6865 };
6866 struct rpc_task *task;
7c44f1ae
WAA		 6867
6868 dprintk("--> %s\n", __func__);
7c44f1ae 6869
71a097c6
TM		 6870 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6871 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6872 args.dir = NFS4_CDFC4_FORE;
7c44f1ae 6873
d9ddbf5d
TM		 6874 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
6875 if (xprt != rcu_access_pointer(clnt->cl_xprt))
6876 args.dir = NFS4_CDFC4_FORE;
6877
6878 task = rpc_run_task(&task_setup_data);
6879 if (!IS_ERR(task)) {
6880 status = task->tk_status;
6881 rpc_put_task(task);
6882 } else
6883 status = PTR_ERR(task);
c6d01c6f 6884 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 6885 if (status == 0) {
71a097c6 6886 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 6887 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6888 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6889 status = -EIO;
71a097c6 6890 goto out;
7c44f1ae 6891 }
71a097c6 6892 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 6893 dprintk("NFS: %s: Unexpected direction from server\n",
6894 __func__);
6895 status = -EIO;
71a097c6 6896 goto out;
7c44f1ae 6897 }
71a097c6 6898 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 6899 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6900 __func__);
6901 status = -EIO;
71a097c6 6902 goto out;
7c44f1ae
WAA		 6903 }
6904 }
7c44f1ae
WAA		 6905out:
6906 dprintk("<-- %s status= %d\n", __func__, status);
6907 return status;
6908}
6909
d9ddbf5d
TM		 6910struct rpc_bind_conn_calldata {
6911 struct nfs_client *clp;
6912 struct rpc_cred *cred;
6913};
6914
6915static int
6916nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
6917 struct rpc_xprt *xprt,
6918 void *calldata)
6919{
6920 struct rpc_bind_conn_calldata *p = calldata;
6921
6922 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
6923}
6924
6925int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
6926{
6927 struct rpc_bind_conn_calldata data = {
6928 .clp = clp,
6929 .cred = cred,
6930 };
6931 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
6932 nfs4_proc_bind_conn_to_session_callback, &data);
6933}
6934
99fe60d0 6935/*
fa940720
WAA		 6936 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6937 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6938 */
6939static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6940 .how = SP4_MACH_CRED,
6941 .enforce.u.words = {
6942 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6943 1 << (OP_EXCHANGE_ID - 32) |
6944 1 << (OP_CREATE_SESSION - 32) |
6945 1 << (OP_DESTROY_SESSION - 32) |
6946 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6947 },
6948 .allow.u.words = {
6949 [0] = 1 << (OP_CLOSE) |
99ade3c7 6950 1 << (OP_OPEN_DOWNGRADE) |
a0279625 6951 1 << (OP_LOCKU) |
99ade3c7 6952 1 << (OP_DELEGRETURN) |
a0279625 6953 1 << (OP_COMMIT),
8b5bee2e 6954 [1] = 1 << (OP_SECINFO - 32) |
3787d506 6955 1 << (OP_SECINFO_NO_NAME - 32) |
99ade3c7 6956 1 << (OP_LAYOUTRETURN - 32) |
3787d506 6957 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6958 1 << (OP_FREE_STATEID - 32) |
6959 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6960 }
6961};
6962
6963/*
6964 * Select the state protection mode for client `clp' given the server results
6965 * from exchange_id in `sp'.
99fe60d0 6966 *
2031cd1a
WAA		 6967 * Returns 0 on success, negative errno otherwise.
6968 */
6969static int nfs4_sp4_select_mode(struct nfs_client *clp,
6970 struct nfs41_state_protection *sp)
6971{
6972 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6973 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6974 1 << (OP_EXCHANGE_ID - 32) |
6975 1 << (OP_CREATE_SESSION - 32) |
6976 1 << (OP_DESTROY_SESSION - 32) |
6977 1 << (OP_DESTROY_CLIENTID - 32)
6978 };
6979 unsigned int i;
6980
6981 if (sp->how == SP4_MACH_CRED) {
6982 /* Print state protect result */
6983 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6984 for (i = 0; i <= LAST_NFS4_OP; i++) {
6985 if (test_bit(i, sp->enforce.u.longs))
6986 dfprintk(MOUNT, " enforce op %d\n", i);
6987 if (test_bit(i, sp->allow.u.longs))
6988 dfprintk(MOUNT, " allow op %d\n", i);
6989 }
6990
6991 /* make sure nothing is on enforce list that isn't supported */
6992 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6993 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6994 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6995 return -EINVAL;
6996 }
6997 }
6998
6999 /*
7000 * Minimal mode - state operations are allowed to use machine
7001 * credential. Note this already happens by default, so the
7002 * client doesn't have to do anything more than the negotiation.
7003 *
7004 * NOTE: we don't care if EXCHANGE_ID is in the list -
7005 * we're already using the machine cred for exchange_id
7006 * and will never use a different cred.
7007 */
7008 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
7009 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
7010 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
7011 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
7012 dfprintk(MOUNT, "sp4_mach_cred:\n");
7013 dfprintk(MOUNT, " minimal mode enabled\n");
7014 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
7015 } else {
7016 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7017 return -EINVAL;
7018 }
fa940720
WAA		 7019
7020 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
99ade3c7
AE		 7021 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
7022 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
fa940720
WAA		 7023 test_bit(OP_LOCKU, sp->allow.u.longs)) {
7024 dfprintk(MOUNT, " cleanup mode enabled\n");
7025 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
7026 }
8b5bee2e 7027
99ade3c7
AE		 7028 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
7029 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
7030 set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP,
7031 &clp->cl_sp4_flags);
7032 }
7033
8b5bee2e
WAA		 7034 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
7035 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
7036 dfprintk(MOUNT, " secinfo mode enabled\n");
7037 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
7038 }
3787d506
WAA		 7039
7040 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
7041 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
7042 dfprintk(MOUNT, " stateid mode enabled\n");
7043 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
7044 }
8c21c62c
WAA		 7045
7046 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
7047 dfprintk(MOUNT, " write mode enabled\n");
7048 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
7049 }
7050
7051 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
7052 dfprintk(MOUNT, " commit mode enabled\n");
7053 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
7054 }
2031cd1a
WAA		 7055 }
7056
7057 return 0;
7058}
7059
7060/*
7061 * _nfs4_proc_exchange_id()
6bbb4ae8 7062 *
2031cd1a 7063 * Wrapper for EXCHANGE_ID operation.
99fe60d0 7064 */
2031cd1a
WAA		 7065static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
7066 u32 sp4_how)
99fe60d0
BH		 7067{
7068 nfs4_verifier verifier;
7069 struct nfs41_exchange_id_args args = {
cd93710e 7070 .verifier = &verifier,
99fe60d0 7071 .client = clp,
cd3fadec 7072#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 7073 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 7074 EXCHGID4_FLAG_BIND_PRINC_STATEID |
7075 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
7076#else
7077 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7078 EXCHGID4_FLAG_BIND_PRINC_STATEID,
7079#endif
99fe60d0
BH		 7080 };
7081 struct nfs41_exchange_id_res res = {
32b01310 7082 0
99fe60d0
BH		 7083 };
7084 int status;
7085 struct rpc_message msg = {
7086 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
7087 .rpc_argp = &args,
7088 .rpc_resp = &res,
7089 .rpc_cred = cred,
7090 };
99fe60d0 7091
f092075d 7092 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 7093
7094 status = nfs4_init_uniform_client_string(clp);
7095 if (status)
3a6bb738 7096 goto out;
3a6bb738
JL		 7097
7098 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6bbb4ae8 7099 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 7100 clp->cl_owner_id);
99fe60d0 7101
acdeb69d 7102 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 7103 GFP_NOFS);
acdeb69d 7104 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 7105 status = -ENOMEM;
7106 goto out;
7107 }
78fe0f41 7108
79d4e1f0 7109 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 7110 GFP_NOFS);
177313f1 7111 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 7112 status = -ENOMEM;
acdeb69d 7113 goto out_server_owner;
abe9a6d5 7114 }
78fe0f41 7115
bbafffd2 7116 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 7117 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 7118 status = -ENOMEM;
7119 goto out_server_scope;
7120 }
7121
2031cd1a
WAA		 7122 switch (sp4_how) {
7123 case SP4_NONE:
7124 args.state_protect.how = SP4_NONE;
7125 break;
7126
7127 case SP4_MACH_CRED:
7128 args.state_protect = nfs4_sp4_mach_cred_request;
7129 break;
7130
7131 default:
7132 /* unsupported! */
7133 WARN_ON_ONCE(1);
7134 status = -EINVAL;
6b55970b 7135 goto out_impl_id;
2031cd1a
WAA		 7136 }
7137
1bd714f2 7138 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7139 trace_nfs4_exchange_id(clp, status);
177313f1 7140 if (status == 0)
32b01310 7141 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 7142
2031cd1a
WAA		 7143 if (status == 0)
7144 status = nfs4_sp4_select_mode(clp, &res.state_protect);
7145
acdeb69d 7146 if (status == 0) {
32b01310 7147 clp->cl_clientid = res.clientid;
e11259f9
TM		 7148 clp->cl_exchange_flags = res.flags;
7149 /* Client ID is not confirmed */
7150 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7151 clear_bit(NFS4_SESSION_ESTABLISHED,
7152 &clp->cl_session->session_state);
32b01310 7153 clp->cl_seqid = res.seqid;
e11259f9 7154 }
32b01310 7155
acdeb69d
CL		 7156 kfree(clp->cl_serverowner);
7157 clp->cl_serverowner = res.server_owner;
7158 res.server_owner = NULL;
78fe0f41 7159
7d2ed9ac 7160 /* use the most recent implementation id */
59155546
CL		 7161 kfree(clp->cl_implid);
7162 clp->cl_implid = res.impl_id;
6b55970b 7163 res.impl_id = NULL;
7d2ed9ac 7164
177313f1 7165 if (clp->cl_serverscope != NULL &&
79d4e1f0 7166 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 7167 res.server_scope)) {
7168 dprintk("%s: server_scope mismatch detected\n",
7169 __func__);
7170 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 7171 kfree(clp->cl_serverscope);
7172 clp->cl_serverscope = NULL;
78fe0f41
WAA		 7173 }
7174
177313f1 7175 if (clp->cl_serverscope == NULL) {
79d4e1f0 7176 clp->cl_serverscope = res.server_scope;
6b55970b 7177 res.server_scope = NULL;
abe9a6d5 7178 }
6b55970b 7179 }
7d2ed9ac 7180
6b55970b
KM		 7181out_impl_id:
7182 kfree(res.impl_id);
7d2ed9ac 7183out_server_scope:
abe9a6d5 7184 kfree(res.server_scope);
6b55970b
KM		 7185out_server_owner:
7186 kfree(res.server_owner);
abe9a6d5 7187out:
177313f1 7188 if (clp->cl_implid != NULL)
6bbb4ae8 7189 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 7190 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 7191 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 7192 clp->cl_implid->date.seconds,
7193 clp->cl_implid->date.nseconds);
6bbb4ae8 7194 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 7195 return status;
7196}
7197
2031cd1a
WAA		 7198/*
7199 * nfs4_proc_exchange_id()
7200 *
7201 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7202 *
7203 * Since the clientid has expired, all compounds using sessions
7204 * associated with the stale clientid will be returning
7205 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7206 * be in some phase of session reset.
7207 *
7208 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7209 */
7210int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7211{
7212 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7213 int status;
7214
7215 /* try SP4_MACH_CRED if krb5i/p */
7216 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7217 authflavor == RPC_AUTH_GSS_KRB5P) {
7218 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
7219 if (!status)
7220 return 0;
7221 }
7222
7223 /* try SP4_NONE */
7224 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
7225}
7226
66245539
TM		 7227static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7228 struct rpc_cred *cred)
7229{
7230 struct rpc_message msg = {
7231 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7232 .rpc_argp = clp,
7233 .rpc_cred = cred,
7234 };
7235 int status;
7236
7237 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7238 trace_nfs4_destroy_clientid(clp, status);
66245539 7239 if (status)
02c67525 7240 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7241 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7242 return status;
7243}
7244
7245static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7246 struct rpc_cred *cred)
7247{
7248 unsigned int loop;
7249 int ret;
7250
7251 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7252 ret = _nfs4_proc_destroy_clientid(clp, cred);
7253 switch (ret) {
7254 case -NFS4ERR_DELAY:
7255 case -NFS4ERR_CLIENTID_BUSY:
7256 ssleep(1);
7257 break;
7258 default:
7259 return ret;
7260 }
7261 }
7262 return 0;
7263}
7264
7265int nfs4_destroy_clientid(struct nfs_client *clp)
7266{
7267 struct rpc_cred *cred;
7268 int ret = 0;
7269
7270 if (clp->cl_mvops->minor_version < 1)
7271 goto out;
7272 if (clp->cl_exchange_flags == 0)
7273 goto out;
05f4c350
CL		 7274 if (clp->cl_preserve_clid)
7275 goto out;
73d8bde5 7276 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7277 ret = nfs4_proc_destroy_clientid(clp, cred);
7278 if (cred)
7279 put_rpccred(cred);
7280 switch (ret) {
7281 case 0:
7282 case -NFS4ERR_STALE_CLIENTID:
7283 clp->cl_exchange_flags = 0;
7284 }
7285out:
7286 return ret;
7287}
7288
2050f0cc
AA		 7289struct nfs4_get_lease_time_data {
7290 struct nfs4_get_lease_time_args *args;
7291 struct nfs4_get_lease_time_res *res;
7292 struct nfs_client *clp;
7293};
7294
7295static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7296 void *calldata)
7297{
2050f0cc
AA		 7298 struct nfs4_get_lease_time_data *data =
7299 (struct nfs4_get_lease_time_data *)calldata;
7300
7301 dprintk("--> %s\n", __func__);
7302 /* just setup sequence, do not trigger session recovery
7303 since we're invoked within one */
d9afbd1b
TM		 7304 nfs41_setup_sequence(data->clp->cl_session,
7305 &data->args->la_seq_args,
7306 &data->res->lr_seq_res,
7307 task);
2050f0cc
AA		 7308 dprintk("<-- %s\n", __func__);
7309}
7310
7311/*
7312 * Called from nfs4_state_manager thread for session setup, so don't recover
7313 * from sequence operation or clientid errors.
7314 */
7315static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7316{
7317 struct nfs4_get_lease_time_data *data =
7318 (struct nfs4_get_lease_time_data *)calldata;
7319
7320 dprintk("--> %s\n", __func__);
14516c3a
TM		 7321 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7322 return;
2050f0cc
AA		 7323 switch (task->tk_status) {
7324 case -NFS4ERR_DELAY:
7325 case -NFS4ERR_GRACE:
7326 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7327 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7328 task->tk_status = 0;
a8a4ae3a
AA		 7329 /* fall through */
7330 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7331 rpc_restart_call_prepare(task);
2050f0cc
AA		 7332 return;
7333 }
2050f0cc
AA		 7334 dprintk("<-- %s\n", __func__);
7335}
7336
17280175 7337static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7338 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7339 .rpc_call_done = nfs4_get_lease_time_done,
7340};
7341
7342int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7343{
7344 struct rpc_task *task;
7345 struct nfs4_get_lease_time_args args;
7346 struct nfs4_get_lease_time_res res = {
7347 .lr_fsinfo = fsinfo,
7348 };
7349 struct nfs4_get_lease_time_data data = {
7350 .args = &args,
7351 .res = &res,
7352 .clp = clp,
7353 };
7354 struct rpc_message msg = {
7355 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7356 .rpc_argp = &args,
7357 .rpc_resp = &res,
7358 };
7359 struct rpc_task_setup task_setup = {
7360 .rpc_client = clp->cl_rpcclient,
7361 .rpc_message = &msg,
7362 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7363 .callback_data = &data,
7364 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7365 };
7366 int status;
7367
a9c92d6b 7368 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7369 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7370 dprintk("--> %s\n", __func__);
7371 task = rpc_run_task(&task_setup);
7372
7373 if (IS_ERR(task))
7374 status = PTR_ERR(task);
7375 else {
7376 status = task->tk_status;
7377 rpc_put_task(task);
7378 }
7379 dprintk("<-- %s return %d\n", __func__, status);
7380
7381 return status;
7382}
7383
fc931582
AA		 7384/*
7385 * Initialize the values to be used by the client in CREATE_SESSION
7386 * If nfs4_init_session set the fore channel request and response sizes,
7387 * use them.
7388 *
7389 * Set the back channel max_resp_sz_cached to zero to force the client to
7390 * always set csa_cachethis to FALSE because the current implementation
7391 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7392 */
6b26cc8c
CL		 7393static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
7394 struct rpc_clnt *clnt)
fc931582 7395{
18aad3d5 7396 unsigned int max_rqst_sz, max_resp_sz;
6b26cc8c 7397 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
18aad3d5
AA		 7398
7399 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7400 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7401
fc931582 7402 /* Fore channel attributes */
18aad3d5
AA		 7403 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7404 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7405 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7406 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7407
7408 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7409 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7410 __func__,
7411 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7412 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7413
7414 /* Back channel attributes */
6b26cc8c
CL		 7415 args->bc_attrs.max_rqst_sz = max_bc_payload;
7416 args->bc_attrs.max_resp_sz = max_bc_payload;
fc931582
AA		 7417 args->bc_attrs.max_resp_sz_cached = 0;
7418 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
f4f58ed1 7419 args->bc_attrs.max_reqs = NFS41_BC_MAX_CALLBACKS;
fc931582
AA		 7420
7421 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7422 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7423 __func__,
7424 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7425 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7426 args->bc_attrs.max_reqs);
7427}
7428
79969dd1
TM		 7429static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7430 struct nfs41_create_session_res *res)
8d35301d 7431{
43c2e885 7432 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7433 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7434
43c2e885
BF		 7435 if (rcvd->max_resp_sz > sent->max_resp_sz)
7436 return -EINVAL;
7437 /*
7438 * Our requested max_ops is the minimum we need; we're not
7439 * prepared to break up compounds into smaller pieces than that.
7440 * So, no point even trying to continue if the server won't
7441 * cooperate:
7442 */
7443 if (rcvd->max_ops < sent->max_ops)
7444 return -EINVAL;
7445 if (rcvd->max_reqs == 0)
7446 return -EINVAL;
b4b9a0c1
VG		 7447 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7448 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7449 return 0;
8d35301d
AA		 7450}
7451
79969dd1
TM		 7452static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7453 struct nfs41_create_session_res *res)
43c2e885
BF		 7454{
7455 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7456 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7457
b1c0df5f
TM		 7458 if (!(res->flags & SESSION4_BACK_CHAN))
7459 goto out;
43c2e885
BF		 7460 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7461 return -EINVAL;
7462 if (rcvd->max_resp_sz < sent->max_resp_sz)
7463 return -EINVAL;
7464 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7465 return -EINVAL;
7466 /* These would render the backchannel useless: */
b4b9a0c1 7467 if (rcvd->max_ops != sent->max_ops)
43c2e885 7468 return -EINVAL;
b4b9a0c1 7469 if (rcvd->max_reqs != sent->max_reqs)
43c2e885 7470 return -EINVAL;
b1c0df5f 7471out:
43c2e885
BF		 7472 return 0;
7473}
8d35301d 7474
8d35301d 7475static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7476 struct nfs41_create_session_res *res)
8d35301d 7477{
43c2e885 7478 int ret;
8d35301d 7479
79969dd1 7480 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7481 if (ret)
7482 return ret;
79969dd1
TM		 7483 return nfs4_verify_back_channel_attrs(args, res);
7484}
7485
7486static void nfs4_update_session(struct nfs4_session *session,
7487 struct nfs41_create_session_res *res)
7488{
7489 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7490 /* Mark client id and session as being confirmed */
7491 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7492 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7493 session->flags = res->flags;
7494 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7495 if (res->flags & SESSION4_BACK_CHAN)
7496 memcpy(&session->bc_attrs, &res->bc_attrs,
7497 sizeof(session->bc_attrs));
8d35301d
AA		 7498}
7499
848f5bda
TM		 7500static int _nfs4_proc_create_session(struct nfs_client *clp,
7501 struct rpc_cred *cred)
fc931582
AA		 7502{
7503 struct nfs4_session *session = clp->cl_session;
7504 struct nfs41_create_session_args args = {
7505 .client = clp,
79969dd1
TM		 7506 .clientid = clp->cl_clientid,
7507 .seqid = clp->cl_seqid,
fc931582
AA		 7508 .cb_program = NFS4_CALLBACK,
7509 };
79969dd1
TM		 7510 struct nfs41_create_session_res res;
7511
fc931582
AA		 7512 struct rpc_message msg = {
7513 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7514 .rpc_argp = &args,
7515 .rpc_resp = &res,
848f5bda 7516 .rpc_cred = cred,
fc931582
AA		 7517 };
7518 int status;
7519
6b26cc8c 7520 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
0f91421e 7521 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7522
1bd714f2 7523 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7524 trace_nfs4_create_session(clp, status);
fc931582 7525
43095d39 7526 if (!status) {
8d35301d 7527 /* Verify the session's negotiated channel_attrs values */
79969dd1 7528 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7529 /* Increment the clientid slot sequence id */
79969dd1
TM		 7530 if (clp->cl_seqid == res.seqid)
7531 clp->cl_seqid++;
7532 if (status)
7533 goto out;
7534 nfs4_update_session(session, &res);
fc931582 7535 }
79969dd1 7536out:
fc931582
AA		 7537 return status;
7538}
7539
7540/*
7541 * Issues a CREATE_SESSION operation to the server.
7542 * It is the responsibility of the caller to verify the session is
7543 * expired before calling this routine.
7544 */
848f5bda 7545int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7546{
7547 int status;
7548 unsigned *ptr;
fc931582
AA		 7549 struct nfs4_session *session = clp->cl_session;
7550
7551 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7552
848f5bda 7553 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7554 if (status)
7555 goto out;
7556
aacd5537
AA		 7557 /* Init or reset the session slot tables */
7558 status = nfs4_setup_session_slot_tables(session);
7559 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7560 if (status)
7561 goto out;
7562
7563 ptr = (unsigned *)&session->sess_id.data[0];
7564 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7565 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7566out:
7567 dprintk("<-- %s\n", __func__);
7568 return status;
7569}
7570
0f3e66c6
AA		 7571/*
7572 * Issue the over-the-wire RPC DESTROY_SESSION.
7573 * The caller must serialize access to this routine.
7574 */
848f5bda
TM		 7575int nfs4_proc_destroy_session(struct nfs4_session *session,
7576 struct rpc_cred *cred)
0f3e66c6 7577{
848f5bda
TM		 7578 struct rpc_message msg = {
7579 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7580 .rpc_argp = session,
7581 .rpc_cred = cred,
7582 };
0f3e66c6 7583 int status = 0;
0f3e66c6
AA		 7584
7585 dprintk("--> nfs4_proc_destroy_session\n");
7586
7587 /* session is still being setup */
e11259f9
TM		 7588 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7589 return 0;
0f3e66c6 7590
1bd714f2 7591 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7592 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7593
7594 if (status)
08106ac7 7595 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7596 "Session has been destroyed regardless...\n", status);
7597
7598 dprintk("<-- nfs4_proc_destroy_session\n");
7599 return status;
7600}
7601
fc01cea9
AA		 7602/*
7603 * Renew the cl_session lease.
7604 */
d5f8d3fe
TM		 7605struct nfs4_sequence_data {
7606 struct nfs_client *clp;
7607 struct nfs4_sequence_args args;
7608 struct nfs4_sequence_res res;
7609};
7610
dc96aef9
AB		 7611static void nfs41_sequence_release(void *data)
7612{
d5f8d3fe
TM		 7613 struct nfs4_sequence_data *calldata = data;
7614 struct nfs_client *clp = calldata->clp;
dc96aef9 7615
7135840f
AB		 7616 if (atomic_read(&clp->cl_count) > 1)
7617 nfs4_schedule_state_renewal(clp);
7618 nfs_put_client(clp);
d5f8d3fe 7619 kfree(calldata);
dc96aef9
AB		 7620}
7621
aa5190d0
TM		 7622static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7623{
7624 switch(task->tk_status) {
7625 case -NFS4ERR_DELAY:
aa5190d0
TM		 7626 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7627 return -EAGAIN;
7628 default:
0400a6b0 7629 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7630 }
7631 return 0;
7632}
7633
dc96aef9 7634static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7635{
d5f8d3fe
TM		 7636 struct nfs4_sequence_data *calldata = data;
7637 struct nfs_client *clp = calldata->clp;
fc01cea9 7638
14516c3a
TM		 7639 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7640 return;
fc01cea9 7641
c6d01c6f 7642 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7643 if (task->tk_status < 0) {
7644 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7645 if (atomic_read(&clp->cl_count) == 1)
7646 goto out;
fc01cea9 7647
aa5190d0
TM		 7648 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7649 rpc_restart_call_prepare(task);
fc01cea9
AA		 7650 return;
7651 }
7652 }
fc01cea9 7653 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7654out:
fc01cea9
AA		 7655 dprintk("<-- %s\n", __func__);
7656}
7657
7658static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7659{
d5f8d3fe
TM		 7660 struct nfs4_sequence_data *calldata = data;
7661 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7662 struct nfs4_sequence_args *args;
7663 struct nfs4_sequence_res *res;
7664
fc01cea9
AA		 7665 args = task->tk_msg.rpc_argp;
7666 res = task->tk_msg.rpc_resp;
7667
d9afbd1b 7668 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7669}
7670
7671static const struct rpc_call_ops nfs41_sequence_ops = {
7672 .rpc_call_done = nfs41_sequence_call_done,
7673 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7674 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7675};
7676
8fe72bac
TM		 7677static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7678 struct rpc_cred *cred,
7679 bool is_privileged)
fc01cea9 7680{
d5f8d3fe 7681 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7682 struct rpc_message msg = {
7683 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7684 .rpc_cred = cred,
7685 };
71ac6da9
TM		 7686 struct rpc_task_setup task_setup_data = {
7687 .rpc_client = clp->cl_rpcclient,
7688 .rpc_message = &msg,
8fe72bac 7689 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7690 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7691 };
fc01cea9 7692
7135840f 7693 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7694 return ERR_PTR(-EIO);
dfb4f309 7695 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7696 if (calldata == NULL) {
7135840f 7697 nfs_put_client(clp);
71ac6da9 7698 return ERR_PTR(-ENOMEM);
fc01cea9 7699 }
a9c92d6b 7700 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7701 if (is_privileged)
7702 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7703 msg.rpc_argp = &calldata->args;
7704 msg.rpc_resp = &calldata->res;
7705 calldata->clp = clp;
71ac6da9 7706 task_setup_data.callback_data = calldata;
fc01cea9 7707
71ac6da9
TM		 7708 return rpc_run_task(&task_setup_data);
7709}
7710
2f60ea6b 7711static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7712{
7713 struct rpc_task *task;
7714 int ret = 0;
7715
2f60ea6b 7716 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7717 return -EAGAIN;
8fe72bac 7718 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7719 if (IS_ERR(task))
7720 ret = PTR_ERR(task);
7721 else
bf294b41 7722 rpc_put_task_async(task);
71ac6da9
TM		 7723 dprintk("<-- %s status=%d\n", __func__, ret);
7724 return ret;
7725}
7726
7727static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7728{
7729 struct rpc_task *task;
7730 int ret;
7731
8fe72bac 7732 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7733 if (IS_ERR(task)) {
7734 ret = PTR_ERR(task);
7735 goto out;
7736 }
7737 ret = rpc_wait_for_completion_task(task);
be824167 7738 if (!ret)
71ac6da9
TM		 7739 ret = task->tk_status;
7740 rpc_put_task(task);
7741out:
7742 dprintk("<-- %s status=%d\n", __func__, ret);
7743 return ret;
fc01cea9
AA		 7744}
7745
fce5c838
RL		 7746struct nfs4_reclaim_complete_data {
7747 struct nfs_client *clp;
7748 struct nfs41_reclaim_complete_args arg;
7749 struct nfs41_reclaim_complete_res res;
7750};
7751
7752static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7753{
7754 struct nfs4_reclaim_complete_data *calldata = data;
7755
d9afbd1b
TM		 7756 nfs41_setup_sequence(calldata->clp->cl_session,
7757 &calldata->arg.seq_args,
7758 &calldata->res.seq_res,
7759 task);
fce5c838
RL		 7760}
7761
aa5190d0
TM		 7762static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7763{
7764 switch(task->tk_status) {
7765 case 0:
7766 case -NFS4ERR_COMPLETE_ALREADY:
7767 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7768 break;
7769 case -NFS4ERR_DELAY:
aa5190d0 7770 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7771 /* fall through */
7772 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7773 return -EAGAIN;
7774 default:
0400a6b0 7775 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7776 }
7777 return 0;
7778}
7779
fce5c838
RL		 7780static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7781{
7782 struct nfs4_reclaim_complete_data *calldata = data;
7783 struct nfs_client *clp = calldata->clp;
7784 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7785
7786 dprintk("--> %s\n", __func__);
14516c3a
TM		 7787 if (!nfs41_sequence_done(task, res))
7788 return;
fce5c838 7789
c6d01c6f 7790 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7791 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7792 rpc_restart_call_prepare(task);
7793 return;
7794 }
fce5c838
RL		 7795 dprintk("<-- %s\n", __func__);
7796}
7797
7798static void nfs4_free_reclaim_complete_data(void *data)
7799{
7800 struct nfs4_reclaim_complete_data *calldata = data;
7801
7802 kfree(calldata);
7803}
7804
7805static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7806 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7807 .rpc_call_done = nfs4_reclaim_complete_done,
7808 .rpc_release = nfs4_free_reclaim_complete_data,
7809};
7810
7811/*
7812 * Issue a global reclaim complete.
7813 */
965e9c23
TM		 7814static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7815 struct rpc_cred *cred)
fce5c838
RL		 7816{
7817 struct nfs4_reclaim_complete_data *calldata;
7818 struct rpc_task *task;
7819 struct rpc_message msg = {
7820 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7821 .rpc_cred = cred,
fce5c838
RL		 7822 };
7823 struct rpc_task_setup task_setup_data = {
7824 .rpc_client = clp->cl_rpcclient,
7825 .rpc_message = &msg,
7826 .callback_ops = &nfs4_reclaim_complete_call_ops,
7827 .flags = RPC_TASK_ASYNC,
7828 };
7829 int status = -ENOMEM;
7830
7831 dprintk("--> %s\n", __func__);
8535b2be 7832 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7833 if (calldata == NULL)
7834 goto out;
7835 calldata->clp = clp;
7836 calldata->arg.one_fs = 0;
fce5c838 7837
a9c92d6b 7838 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7839 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7840 msg.rpc_argp = &calldata->arg;
7841 msg.rpc_resp = &calldata->res;
7842 task_setup_data.callback_data = calldata;
7843 task = rpc_run_task(&task_setup_data);
acf82b85 7844 if (IS_ERR(task)) {
fce5c838 7845 status = PTR_ERR(task);
acf82b85
DC		 7846 goto out;
7847 }
c34c32ea
AA		 7848 status = nfs4_wait_for_completion_rpc_task(task);
7849 if (status == 0)
7850 status = task->tk_status;
fce5c838 7851 rpc_put_task(task);
acf82b85 7852 return 0;
fce5c838
RL		 7853out:
7854 dprintk("<-- %s status=%d\n", __func__, status);
7855 return status;
7856}
b1f69b75
AA		 7857
7858static void
7859nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7860{
7861 struct nfs4_layoutget *lgp = calldata;
c31663d4 7862 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7863 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7864
7865 dprintk("--> %s\n", __func__);
183d9e7b
JL		 7866 nfs41_setup_sequence(session, &lgp->args.seq_args,
7867 &lgp->res.seq_res, task);
7868 dprintk("<-- %s\n", __func__);
b1f69b75
AA		 7869}
7870
7871static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7872{
7873 struct nfs4_layoutget *lgp = calldata;
183d9e7b
JL		 7874
7875 dprintk("--> %s\n", __func__);
7876 nfs41_sequence_done(task, &lgp->res.seq_res);
7877 dprintk("<-- %s\n", __func__);
7878}
7879
7880static int
7881nfs4_layoutget_handle_exception(struct rpc_task *task,
7882 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
7883{
ee314c2a
TM		 7884 struct inode *inode = lgp->args.inode;
7885 struct nfs_server *server = NFS_SERVER(inode);
7886 struct pnfs_layout_hdr *lo;
e85d7ee4
TM		 7887 int nfs4err = task->tk_status;
7888 int err, status = 0;
f7db0b28 7889 LIST_HEAD(head);
b1f69b75 7890
ed7e5423 7891 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7892
e85d7ee4 7893 switch (nfs4err) {
b1f69b75 7894 case 0:
ee314c2a 7895 goto out;
7c1e6e58
PT		 7896
7897 /*
7898 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
7899 * on the file. set tk_status to -ENODATA to tell upper layer to
7900 * retry go inband.
7901 */
7902 case -NFS4ERR_LAYOUTUNAVAILABLE:
183d9e7b 7903 status = -ENODATA;
7c1e6e58 7904 goto out;
21b874c8
TM		 7905 /*
7906 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
7907 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
7908 */
7909 case -NFS4ERR_BADLAYOUT:
183d9e7b
JL		 7910 status = -EOVERFLOW;
7911 goto out;
ed7e5423
BH		 7912 /*
7913 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
21b874c8
TM		 7914 * (or clients) writing to the same RAID stripe except when
7915 * the minlength argument is 0 (see RFC5661 section 18.43.3).
183d9e7b
JL		 7916 *
7917 * Treat it like we would RECALLCONFLICT -- we retry for a little
7918 * while, and then eventually give up.
ed7e5423 7919 */
b1f69b75 7920 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b
JL		 7921 if (lgp->args.minlength == 0) {
7922 status = -EOVERFLOW;
7923 goto out;
ed7e5423 7924 }
e85d7ee4
TM		 7925 status = -EBUSY;
7926 break;
183d9e7b 7927 case -NFS4ERR_RECALLCONFLICT:
183d9e7b 7928 status = -ERECALLCONFLICT;
e85d7ee4 7929 break;
ee314c2a
TM		 7930 case -NFS4ERR_EXPIRED:
7931 case -NFS4ERR_BAD_STATEID:
183d9e7b 7932 exception->timeout = 0;
ee314c2a 7933 spin_lock(&inode->i_lock);
f7db0b28
TM		 7934 lo = NFS_I(inode)->layout;
7935 /* If the open stateid was bad, then recover it. */
7936 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
7937 nfs4_stateid_match_other(&lgp->args.stateid,
2259f960 7938 &lgp->args.ctx->state->stateid)) {
ee314c2a 7939 spin_unlock(&inode->i_lock);
183d9e7b 7940 exception->state = lgp->args.ctx->state;
2259f960
TM		 7941 break;
7942 }
f7db0b28
TM		 7943
7944 /*
7945 * Mark the bad layout state as invalid, then retry
7946 */
668f455d 7947 pnfs_mark_layout_stateid_invalid(lo, &head);
f7db0b28
TM		 7948 spin_unlock(&inode->i_lock);
7949 pnfs_free_lseg_list(&head);
7950 status = -EAGAIN;
7951 goto out;
b1f69b75 7952 }
183d9e7b 7953
e85d7ee4
TM		 7954 err = nfs4_handle_exception(server, nfs4err, exception);
7955 if (!status) {
7956 if (exception->retry)
7957 status = -EAGAIN;
7958 else
7959 status = err;
7960 }
ee314c2a 7961out:
b1f69b75 7962 dprintk("<-- %s\n", __func__);
183d9e7b 7963 return status;
b1f69b75
AA		 7964}
7965
8554116e
IK		 7966static size_t max_response_pages(struct nfs_server *server)
7967{
7968 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7969 return nfs_page_array_len(0, max_resp_sz);
7970}
7971
7972static void nfs4_free_pages(struct page **pages, size_t size)
7973{
7974 int i;
7975
7976 if (!pages)
7977 return;
7978
7979 for (i = 0; i < size; i++) {
7980 if (!pages[i])
7981 break;
7982 __free_page(pages[i]);
7983 }
7984 kfree(pages);
7985}
7986
7987static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7988{
7989 struct page **pages;
7990 int i;
7991
7992 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7993 if (!pages) {
7994 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7995 return NULL;
7996 }
7997
7998 for (i = 0; i < size; i++) {
7999 pages[i] = alloc_page(gfp_flags);
8000 if (!pages[i]) {
8001 dprintk("%s: failed to allocate page\n", __func__);
8002 nfs4_free_pages(pages, size);
8003 return NULL;
8004 }
8005 }
8006
8007 return pages;
8008}
8009
b1f69b75
AA		 8010static void nfs4_layoutget_release(void *calldata)
8011{
8012 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 8013 struct inode *inode = lgp->args.inode;
8014 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8015 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8016
8017 dprintk("--> %s\n", __func__);
8554116e 8018 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 8019 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 8020 put_nfs_open_context(lgp->args.ctx);
8021 kfree(calldata);
8022 dprintk("<-- %s\n", __func__);
8023}
8024
8025static const struct rpc_call_ops nfs4_layoutget_call_ops = {
8026 .rpc_call_prepare = nfs4_layoutget_prepare,
8027 .rpc_call_done = nfs4_layoutget_done,
8028 .rpc_release = nfs4_layoutget_release,
8029};
8030
a0b0a6e3 8031struct pnfs_layout_segment *
183d9e7b 8032nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags)
b1f69b75 8033{
a47970ff
WAA		 8034 struct inode *inode = lgp->args.inode;
8035 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8036 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8037 struct rpc_task *task;
8038 struct rpc_message msg = {
8039 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
8040 .rpc_argp = &lgp->args,
8041 .rpc_resp = &lgp->res,
6ab59344 8042 .rpc_cred = lgp->cred,
b1f69b75
AA		 8043 };
8044 struct rpc_task_setup task_setup_data = {
8045 .rpc_client = server->client,
8046 .rpc_message = &msg,
8047 .callback_ops = &nfs4_layoutget_call_ops,
8048 .callback_data = lgp,
8049 .flags = RPC_TASK_ASYNC,
8050 };
a0b0a6e3 8051 struct pnfs_layout_segment *lseg = NULL;
bc23676c
TM		 8052 struct nfs4_exception exception = {
8053 .inode = inode,
8054 .timeout = *timeout,
8055 };
b1f69b75
AA		 8056 int status = 0;
8057
8058 dprintk("--> %s\n", __func__);
8059
4bd5a980
PT		 8060 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
8061 pnfs_get_layout_hdr(NFS_I(inode)->layout);
8062
8554116e
IK		 8063 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
8064 if (!lgp->args.layout.pages) {
8065 nfs4_layoutget_release(lgp);
a0b0a6e3 8066 return ERR_PTR(-ENOMEM);
8554116e
IK		 8067 }
8068 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
8069
35124a09 8070 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 8071 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 8072 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 8073
b1f69b75
AA		 8074 task = rpc_run_task(&task_setup_data);
8075 if (IS_ERR(task))
a0b0a6e3 8076 return ERR_CAST(task);
b1f69b75 8077 status = nfs4_wait_for_completion_rpc_task(task);
183d9e7b
JL		 8078 if (status == 0) {
8079 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
8080 *timeout = exception.timeout;
8081 }
8082
1037e6ea
TM		 8083 trace_nfs4_layoutget(lgp->args.ctx,
8084 &lgp->args.range,
8085 &lgp->res.range,
48c9579a 8086 &lgp->res.stateid,
1037e6ea 8087 status);
183d9e7b 8088
085b7a45
WAA		 8089 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8090 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 8091 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 8092 rpc_put_task(task);
8093 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 8094 if (status)
8095 return ERR_PTR(status);
8096 return lseg;
b1f69b75
AA		 8097}
8098
cbe82603
BH		 8099static void
8100nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8101{
8102 struct nfs4_layoutreturn *lrp = calldata;
8103
8104 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 8105 nfs41_setup_sequence(lrp->clp->cl_session,
8106 &lrp->args.seq_args,
8107 &lrp->res.seq_res,
8108 task);
cbe82603
BH		 8109}
8110
8111static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8112{
8113 struct nfs4_layoutreturn *lrp = calldata;
8114 struct nfs_server *server;
8115
8116 dprintk("--> %s\n", __func__);
8117
6ba7db34 8118 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 8119 return;
8120
8121 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 8122 switch (task->tk_status) {
8123 default:
8124 task->tk_status = 0;
8125 case 0:
8126 break;
8127 case -NFS4ERR_DELAY:
8478eaa1 8128 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 8129 break;
d00c5d43 8130 rpc_restart_call_prepare(task);
cbe82603
BH		 8131 return;
8132 }
cbe82603
BH		 8133 dprintk("<-- %s\n", __func__);
8134}
8135
8136static void nfs4_layoutreturn_release(void *calldata)
8137{
8138 struct nfs4_layoutreturn *lrp = calldata;
849b286f 8139 struct pnfs_layout_hdr *lo = lrp->args.layout;
c5d73716 8140 LIST_HEAD(freeme);
cbe82603
BH		 8141
8142 dprintk("--> %s\n", __func__);
849b286f 8143 spin_lock(&lo->plh_inode->i_lock);
6d597e17
JL		 8144 pnfs_mark_matching_lsegs_invalid(lo, &freeme, &lrp->args.range,
8145 be32_to_cpu(lrp->args.stateid.seqid));
45fcc7bc 8146 if (lrp->res.lrs_present && pnfs_layout_is_valid(lo))
849b286f 8147 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
d67ae825 8148 pnfs_clear_layoutreturn_waitbit(lo);
849b286f 8149 spin_unlock(&lo->plh_inode->i_lock);
c5d73716 8150 pnfs_free_lseg_list(&freeme);
70c3bd2b 8151 pnfs_put_layout_hdr(lrp->args.layout);
5a0ec8ac 8152 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 8153 kfree(calldata);
8154 dprintk("<-- %s\n", __func__);
8155}
8156
8157static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8158 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8159 .rpc_call_done = nfs4_layoutreturn_done,
8160 .rpc_release = nfs4_layoutreturn_release,
8161};
8162
6c16605d 8163int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 8164{
8165 struct rpc_task *task;
8166 struct rpc_message msg = {
8167 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8168 .rpc_argp = &lrp->args,
8169 .rpc_resp = &lrp->res,
9556000d 8170 .rpc_cred = lrp->cred,
cbe82603
BH		 8171 };
8172 struct rpc_task_setup task_setup_data = {
1771c577 8173 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8174 .rpc_message = &msg,
8175 .callback_ops = &nfs4_layoutreturn_call_ops,
8176 .callback_data = lrp,
8177 };
6c16605d 8178 int status = 0;
cbe82603 8179
99ade3c7
AE		 8180 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
8181 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
8182 &task_setup_data.rpc_client, &msg);
8183
cbe82603 8184 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8185 if (!sync) {
8186 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8187 if (!lrp->inode) {
8188 nfs4_layoutreturn_release(lrp);
8189 return -EAGAIN;
8190 }
8191 task_setup_data.flags |= RPC_TASK_ASYNC;
8192 }
a9c92d6b 8193 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8194 task = rpc_run_task(&task_setup_data);
8195 if (IS_ERR(task))
8196 return PTR_ERR(task);
5a0ec8ac
TM		 8197 if (sync)
8198 status = task->tk_status;
48c9579a 8199 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
cbe82603
BH		 8200 dprintk("<-- %s status=%d\n", __func__, status);
8201 rpc_put_task(task);
8202 return status;
8203}
8204
b1f69b75 8205static int
cd5875fe
TM		 8206_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8207 struct pnfs_device *pdev,
8208 struct rpc_cred *cred)
b1f69b75
AA		 8209{
8210 struct nfs4_getdeviceinfo_args args = {
8211 .pdev = pdev,
4e590803
TM		 8212 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8213 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8214 };
8215 struct nfs4_getdeviceinfo_res res = {
8216 .pdev = pdev,
8217 };
8218 struct rpc_message msg = {
8219 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8220 .rpc_argp = &args,
8221 .rpc_resp = &res,
cd5875fe 8222 .rpc_cred = cred,
b1f69b75
AA		 8223 };
8224 int status;
8225
8226 dprintk("--> %s\n", __func__);
7c513058 8227 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8228 if (res.notification & ~args.notify_types)
8229 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8230 if (res.notification != args.notify_types)
8231 pdev->nocache = 1;
4e590803 8232
b1f69b75
AA		 8233 dprintk("<-- %s status=%d\n", __func__, status);
8234
8235 return status;
8236}
8237
cd5875fe
TM		 8238int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8239 struct pnfs_device *pdev,
8240 struct rpc_cred *cred)
b1f69b75
AA		 8241{
8242 struct nfs4_exception exception = { };
8243 int err;
8244
8245 do {
8246 err = nfs4_handle_exception(server,
cd5875fe 8247 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8248 &exception);
8249 } while (exception.retry);
8250 return err;
8251}
8252EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8253
863a3c6c
AA		 8254static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8255{
8256 struct nfs4_layoutcommit_data *data = calldata;
8257 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 8258 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 8259
d9afbd1b
TM		 8260 nfs41_setup_sequence(session,
8261 &data->args.seq_args,
8262 &data->res.seq_res,
8263 task);
863a3c6c
AA		 8264}
8265
8266static void
8267nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8268{
8269 struct nfs4_layoutcommit_data *data = calldata;
8270 struct nfs_server *server = NFS_SERVER(data->args.inode);
8271
6ba7db34 8272 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8273 return;
8274
8275 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8276 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8277 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8278 case -NFS4ERR_BADLAYOUT: /* no layout */
8279 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8280 task->tk_status = 0;
e59d27e0 8281 case 0:
e59d27e0
TM		 8282 break;
8283 default:
8478eaa1 8284 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8285 rpc_restart_call_prepare(task);
8286 return;
8287 }
8288 }
863a3c6c
AA		 8289}
8290
8291static void nfs4_layoutcommit_release(void *calldata)
8292{
8293 struct nfs4_layoutcommit_data *data = calldata;
8294
db29c089 8295 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8296 nfs_post_op_update_inode_force_wcc(data->args.inode,
8297 data->res.fattr);
863a3c6c 8298 put_rpccred(data->cred);
472e2594 8299 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8300 kfree(data);
8301}
8302
8303static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8304 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8305 .rpc_call_done = nfs4_layoutcommit_done,
8306 .rpc_release = nfs4_layoutcommit_release,
8307};
8308
8309int
ef311537 8310nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8311{
8312 struct rpc_message msg = {
8313 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8314 .rpc_argp = &data->args,
8315 .rpc_resp = &data->res,
8316 .rpc_cred = data->cred,
8317 };
8318 struct rpc_task_setup task_setup_data = {
8319 .task = &data->task,
8320 .rpc_client = NFS_CLIENT(data->args.inode),
8321 .rpc_message = &msg,
8322 .callback_ops = &nfs4_layoutcommit_ops,
8323 .callback_data = data,
863a3c6c
AA		 8324 };
8325 struct rpc_task *task;
8326 int status = 0;
8327
b4839ebe
KM		 8328 dprintk("NFS: initiating layoutcommit call. sync %d "
8329 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8330 data->args.lastbytewritten,
8331 data->args.inode->i_ino);
8332
472e2594
TM		 8333 if (!sync) {
8334 data->inode = nfs_igrab_and_active(data->args.inode);
8335 if (data->inode == NULL) {
8336 nfs4_layoutcommit_release(data);
8337 return -EAGAIN;
8338 }
8339 task_setup_data.flags = RPC_TASK_ASYNC;
8340 }
a9c92d6b 8341 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8342 task = rpc_run_task(&task_setup_data);
8343 if (IS_ERR(task))
8344 return PTR_ERR(task);
472e2594
TM		 8345 if (sync)
8346 status = task->tk_status;
48c9579a 8347 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
863a3c6c
AA		 8348 dprintk("%s: status %d\n", __func__, status);
8349 rpc_put_task(task);
8350 return status;
8351}
fca78d6d 8352
97431204
AA		 8353/**
8354 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8355 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8356 */
fca78d6d
BS		 8357static int
8358_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8359 struct nfs_fsinfo *info,
8360 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8361{
8362 struct nfs41_secinfo_no_name_args args = {
8363 .style = SECINFO_STYLE_CURRENT_FH,
8364 };
8365 struct nfs4_secinfo_res res = {
8366 .flavors = flavors,
8367 };
8368 struct rpc_message msg = {
8369 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8370 .rpc_argp = &args,
8371 .rpc_resp = &res,
8372 };
b1b3e136 8373 struct rpc_clnt *clnt = server->client;
7cb852df 8374 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8375 int status;
8376
8377 if (use_integrity) {
8378 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8379 cred = nfs4_get_clid_cred(server->nfs_client);
8380 msg.rpc_cred = cred;
b1b3e136
WAA		 8381 }
8382
8383 dprintk("--> %s\n", __func__);
8384 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8385 &res.seq_res, 0);
8386 dprintk("<-- %s status=%d\n", __func__, status);
8387
7cb852df
WAA		 8388 if (cred)
8389 put_rpccred(cred);
b1b3e136
WAA		 8390
8391 return status;
fca78d6d
BS		 8392}
8393
8394static int
8395nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8396 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8397{
8398 struct nfs4_exception exception = { };
8399 int err;
8400 do {
b1b3e136
WAA		 8401 /* first try using integrity protection */
8402 err = -NFS4ERR_WRONGSEC;
8403
8404 /* try to use integrity protection with machine cred */
8405 if (_nfs4_is_integrity_protected(server->nfs_client))
8406 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8407 flavors, true);
8408
8409 /*
8410 * if unable to use integrity protection, or SECINFO with
8411 * integrity protection returns NFS4ERR_WRONGSEC (which is
8412 * disallowed by spec, but exists in deployed servers) use
8413 * the current filesystem's rpc_client and the user cred.
8414 */
8415 if (err == -NFS4ERR_WRONGSEC)
8416 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8417 flavors, false);
8418
fca78d6d
BS		 8419 switch (err) {
8420 case 0:
8421 case -NFS4ERR_WRONGSEC:
78b19bae 8422 case -ENOTSUPP:
05e9cfb4 8423 goto out;
fca78d6d
BS		 8424 default:
8425 err = nfs4_handle_exception(server, err, &exception);
8426 }
8427 } while (exception.retry);
05e9cfb4 8428out:
fca78d6d
BS		 8429 return err;
8430}
8431
8432static int
8433nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8434 struct nfs_fsinfo *info)
8435{
8436 int err;
8437 struct page *page;
367156d9 8438 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8439 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8440 struct nfs4_secinfo4 *secinfo;
8441 int i;
fca78d6d
BS		 8442
8443 page = alloc_page(GFP_KERNEL);
8444 if (!page) {
8445 err = -ENOMEM;
8446 goto out;
8447 }
8448
8449 flavors = page_address(page);
8450 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8451
8452 /*
8453 * Fall back on "guess and check" method if
8454 * the server doesn't support SECINFO_NO_NAME
8455 */
78b19bae 8456 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8457 err = nfs4_find_root_sec(server, fhandle, info);
8458 goto out_freepage;
8459 }
8460 if (err)
8461 goto out_freepage;
8462
58a8cf12
WAA		 8463 for (i = 0; i < flavors->num_flavors; i++) {
8464 secinfo = &flavors->flavors[i];
8465
8466 switch (secinfo->flavor) {
8467 case RPC_AUTH_NULL:
8468 case RPC_AUTH_UNIX:
8469 case RPC_AUTH_GSS:
8470 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8471 &secinfo->flavor_info);
8472 break;
8473 default:
8474 flavor = RPC_AUTH_MAXFLAVOR;
8475 break;
8476 }
8477
4d4b69dd
WAA		 8478 if (!nfs_auth_info_match(&server->auth_info, flavor))
8479 flavor = RPC_AUTH_MAXFLAVOR;
8480
58a8cf12
WAA		 8481 if (flavor != RPC_AUTH_MAXFLAVOR) {
8482 err = nfs4_lookup_root_sec(server, fhandle,
8483 info, flavor);
8484 if (!err)
8485 break;
8486 }
8487 }
8488
8489 if (flavor == RPC_AUTH_MAXFLAVOR)
8490 err = -EPERM;
fca78d6d
BS		 8491
8492out_freepage:
8493 put_page(page);
8494 if (err == -EACCES)
8495 return -EPERM;
8496out:
8497 return err;
8498}
1cab0652 8499
ab7cb0df
TM		 8500static int _nfs41_test_stateid(struct nfs_server *server,
8501 nfs4_stateid *stateid,
8502 struct rpc_cred *cred)
7d974794
BS		 8503{
8504 int status;
8505 struct nfs41_test_stateid_args args = {
1cab0652 8506 .stateid = stateid,
7d974794
BS		 8507 };
8508 struct nfs41_test_stateid_res res;
8509 struct rpc_message msg = {
8510 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8511 .rpc_argp = &args,
8512 .rpc_resp = &res,
ab7cb0df 8513 .rpc_cred = cred,
7d974794 8514 };
3787d506
WAA		 8515 struct rpc_clnt *rpc_client = server->client;
8516
8517 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8518 &rpc_client, &msg);
1cab0652 8519
38527b15 8520 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8521 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8522 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8523 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8524 &args.seq_args, &res.seq_res);
38527b15
CL		 8525 if (status != NFS_OK) {
8526 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8527 return status;
38527b15
CL		 8528 }
8529 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8530 return -res.status;
7d974794
BS		 8531}
8532
38527b15
CL		 8533/**
8534 * nfs41_test_stateid - perform a TEST_STATEID operation
8535 *
8536 * @server: server / transport on which to perform the operation
8537 * @stateid: state ID to test
ab7cb0df 8538 * @cred: credential
38527b15
CL		 8539 *
8540 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8541 * Otherwise a negative NFS4ERR value is returned if the operation
8542 * failed or the state ID is not currently valid.
8543 */
ab7cb0df
TM		 8544static int nfs41_test_stateid(struct nfs_server *server,
8545 nfs4_stateid *stateid,
8546 struct rpc_cred *cred)
7d974794
BS		 8547{
8548 struct nfs4_exception exception = { };
8549 int err;
8550 do {
ab7cb0df 8551 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8552 if (err != -NFS4ERR_DELAY)
8553 break;
8554 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8555 } while (exception.retry);
8556 return err;
8557}
9aeda35f 8558
7c1d5fae
TM		 8559struct nfs_free_stateid_data {
8560 struct nfs_server *server;
8561 struct nfs41_free_stateid_args args;
9aeda35f 8562 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8563};
8564
8565static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8566{
8567 struct nfs_free_stateid_data *data = calldata;
8568 nfs41_setup_sequence(nfs4_get_session(data->server),
8569 &data->args.seq_args,
8570 &data->res.seq_res,
8571 task);
8572}
8573
8574static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8575{
8576 struct nfs_free_stateid_data *data = calldata;
8577
8578 nfs41_sequence_done(task, &data->res.seq_res);
8579
8580 switch (task->tk_status) {
8581 case -NFS4ERR_DELAY:
8478eaa1 8582 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8583 rpc_restart_call_prepare(task);
8584 }
8585}
8586
8587static void nfs41_free_stateid_release(void *calldata)
8588{
8589 kfree(calldata);
8590}
8591
17f26b12 8592static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8593 .rpc_call_prepare = nfs41_free_stateid_prepare,
8594 .rpc_call_done = nfs41_free_stateid_done,
8595 .rpc_release = nfs41_free_stateid_release,
8596};
8597
8598static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8599 nfs4_stateid *stateid,
ab7cb0df 8600 struct rpc_cred *cred,
7c1d5fae
TM		 8601 bool privileged)
8602{
9aeda35f
BS		 8603 struct rpc_message msg = {
8604 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8605 .rpc_cred = cred,
9aeda35f 8606 };
7c1d5fae
TM		 8607 struct rpc_task_setup task_setup = {
8608 .rpc_client = server->client,
8609 .rpc_message = &msg,
8610 .callback_ops = &nfs41_free_stateid_ops,
8611 .flags = RPC_TASK_ASYNC,
8612 };
8613 struct nfs_free_stateid_data *data;
9aeda35f 8614
3787d506
WAA		 8615 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8616 &task_setup.rpc_client, &msg);
8617
38527b15 8618 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8619 data = kmalloc(sizeof(*data), GFP_NOFS);
8620 if (!data)
8621 return ERR_PTR(-ENOMEM);
8622 data->server = server;
8623 nfs4_stateid_copy(&data->args.stateid, stateid);
8624
8625 task_setup.callback_data = data;
8626
8627 msg.rpc_argp = &data->args;
8628 msg.rpc_resp = &data->res;
a9c92d6b 8629 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8630 if (privileged)
8631 nfs4_set_sequence_privileged(&data->args.seq_args);
8632
8633 return rpc_run_task(&task_setup);
9aeda35f
BS		 8634}
8635
38527b15
CL		 8636/**
8637 * nfs41_free_stateid - perform a FREE_STATEID operation
8638 *
8639 * @server: server / transport on which to perform the operation
8640 * @stateid: state ID to release
ab7cb0df 8641 * @cred: credential
38527b15
CL		 8642 *
8643 * Returns NFS_OK if the server freed "stateid". Otherwise a
8644 * negative NFS4ERR value is returned.
8645 */
ab7cb0df
TM		 8646static int nfs41_free_stateid(struct nfs_server *server,
8647 nfs4_stateid *stateid,
8648 struct rpc_cred *cred)
9aeda35f 8649{
7c1d5fae
TM		 8650 struct rpc_task *task;
8651 int ret;
8652
ab7cb0df 8653 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8654 if (IS_ERR(task))
8655 return PTR_ERR(task);
8656 ret = rpc_wait_for_completion_task(task);
8657 if (!ret)
8658 ret = task->tk_status;
8659 rpc_put_task(task);
8660 return ret;
9aeda35f 8661}
36281caa 8662
f1cdae87
JL		 8663static void
8664nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8665{
8666 struct rpc_task *task;
ab7cb0df 8667 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8668
ab7cb0df 8669 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8670 nfs4_free_lock_state(server, lsp);
8671 if (IS_ERR(task))
f1cdae87 8672 return;
c8b2d0bf 8673 rpc_put_task(task);
c8b2d0bf
TM		 8674}
8675
36281caa
TM		 8676static bool nfs41_match_stateid(const nfs4_stateid *s1,
8677 const nfs4_stateid *s2)
8678{
93b717fd
TM		 8679 if (s1->type != s2->type)
8680 return false;
8681
2d2f24ad 8682 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8683 return false;
8684
2d2f24ad 8685 if (s1->seqid == s2->seqid)
36281caa 8686 return true;
2d2f24ad 8687 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8688 return true;
8689
8690 return false;
8691}
8692
557134a3
AA		 8693#endif /* CONFIG_NFS_V4_1 */
8694
36281caa
TM		 8695static bool nfs4_match_stateid(const nfs4_stateid *s1,
8696 const nfs4_stateid *s2)
8697{
f597c537 8698 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8699}
8700
8701
17280175 8702static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8703 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8704 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8705 .recover_open = nfs4_open_reclaim,
8706 .recover_lock = nfs4_lock_reclaim,
591d71cb 8707 .establish_clid = nfs4_init_clientid,
05f4c350 8708 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8709};
8710
591d71cb 8711#if defined(CONFIG_NFS_V4_1)
17280175 8712static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8713 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8714 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8715 .recover_open = nfs4_open_reclaim,
8716 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8717 .establish_clid = nfs41_init_clientid,
fce5c838 8718 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8719 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8720};
8721#endif /* CONFIG_NFS_V4_1 */
8722
17280175 8723static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8724 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8725 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8726 .recover_open = nfs40_open_expired,
591d71cb
AA		 8727 .recover_lock = nfs4_lock_expired,
8728 .establish_clid = nfs4_init_clientid,
8729};
8730
8731#if defined(CONFIG_NFS_V4_1)
17280175 8732static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8733 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8734 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8735 .recover_open = nfs41_open_expired,
8736 .recover_lock = nfs41_lock_expired,
4d643d1d 8737 .establish_clid = nfs41_init_clientid,
1da177e4 8738};
591d71cb 8739#endif /* CONFIG_NFS_V4_1 */
1da177e4 8740
17280175 8741static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8742 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8743 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8744 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8745};
8746
8747#if defined(CONFIG_NFS_V4_1)
17280175 8748static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8749 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8750 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8751 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8752};
8753#endif
8754
ec011fe8 8755static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8756 .get_locations = _nfs40_proc_get_locations,
44c99933 8757 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8758};
8759
8760#if defined(CONFIG_NFS_V4_1)
8761static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8762 .get_locations = _nfs41_proc_get_locations,
44c99933 8763 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8764};
8765#endif /* CONFIG_NFS_V4_1 */
8766
97dc1359
TM		 8767static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8768 .minor_version = 0,
39c6daae
TM		 8769 .init_caps = NFS_CAP_READDIRPLUS
8770 | NFS_CAP_ATOMIC_OPEN
39c6daae 8771 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8772 .init_client = nfs40_init_client,
8773 .shutdown_client = nfs40_shutdown_client,
36281caa 8774 .match_stateid = nfs4_match_stateid,
fca78d6d 8775 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8776 .free_lock_state = nfs4_release_lockowner,
63f5f796 8777 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 8778 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8779 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8780 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8781 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8782 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8783};
8784
8785#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 8786static struct nfs_seqid *
8787nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8788{
8789 return NULL;
8790}
8791
97dc1359
TM		 8792static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8793 .minor_version = 1,
39c6daae
TM		 8794 .init_caps = NFS_CAP_READDIRPLUS
8795 | NFS_CAP_ATOMIC_OPEN
3b66486c 8796 | NFS_CAP_POSIX_LOCK
49f9a0fa 8797 | NFS_CAP_STATEID_NFSV41
e983120e 8798 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8799 .init_client = nfs41_init_client,
8800 .shutdown_client = nfs41_shutdown_client,
36281caa 8801 .match_stateid = nfs41_match_stateid,
fca78d6d 8802 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8803 .free_lock_state = nfs41_free_lock_state,
63f5f796 8804 .alloc_seqid = nfs_alloc_no_seqid,
9915ea7e 8805 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8806 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8807 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8808 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8809 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8810};
8811#endif
8812
42c2c424
SD		 8813#if defined(CONFIG_NFS_V4_2)
8814static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8815 .minor_version = 2,
7017310a
BS		 8816 .init_caps = NFS_CAP_READDIRPLUS
8817 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 8818 | NFS_CAP_POSIX_LOCK
8819 | NFS_CAP_STATEID_NFSV41
e983120e 8820 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 8821 | NFS_CAP_ALLOCATE
2e72448b 8822 | NFS_CAP_COPY
624bd5b7 8823 | NFS_CAP_DEALLOCATE
6c5a0d89 8824 | NFS_CAP_SEEK
e5341f3a
PT		 8825 | NFS_CAP_LAYOUTSTATS
8826 | NFS_CAP_CLONE,
abf79bb3
CL		 8827 .init_client = nfs41_init_client,
8828 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8829 .match_stateid = nfs41_match_stateid,
8830 .find_root_sec = nfs41_find_root_sec,
7017310a 8831 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8832 .call_sync_ops = &nfs41_call_sync_ops,
63f5f796 8833 .alloc_seqid = nfs_alloc_no_seqid,
42c2c424
SD		 8834 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8835 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8836 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 8837 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 8838};
8839#endif
8840
97dc1359
TM		 8841const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8842 [0] = &nfs_v4_0_minor_ops,
8843#if defined(CONFIG_NFS_V4_1)
8844 [1] = &nfs_v4_1_minor_ops,
8845#endif
42c2c424
SD		 8846#if defined(CONFIG_NFS_V4_2)
8847 [2] = &nfs_v4_2_minor_ops,
8848#endif
97dc1359
TM		 8849};
8850
13997823 8851static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
c4803c49
AG		 8852{
8853 ssize_t error, error2;
8854
8855 error = generic_listxattr(dentry, list, size);
8856 if (error < 0)
8857 return error;
8858 if (list) {
8859 list += error;
8860 size -= error;
8861 }
8862
8863 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
8864 if (error2 < 0)
8865 return error2;
8866 return error + error2;
8867}
8868
17f26b12 8869static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8870 .create = nfs_create,
8871 .lookup = nfs_lookup,
8872 .atomic_open = nfs_atomic_open,
8873 .link = nfs_link,
8874 .unlink = nfs_unlink,
8875 .symlink = nfs_symlink,
8876 .mkdir = nfs_mkdir,
8877 .rmdir = nfs_rmdir,
8878 .mknod = nfs_mknod,
8879 .rename = nfs_rename,
8880 .permission = nfs_permission,
8881 .getattr = nfs_getattr,
8882 .setattr = nfs_setattr,
8883 .getxattr = generic_getxattr,
8884 .setxattr = generic_setxattr,
c4803c49 8885 .listxattr = nfs4_listxattr,
73a79706
BS		 8886 .removexattr = generic_removexattr,
8887};
8888
92e1d5be 8889static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8890 .permission = nfs_permission,
8891 .getattr = nfs_getattr,
8892 .setattr = nfs_setattr,
64c2ce8b
AK		 8893 .getxattr = generic_getxattr,
8894 .setxattr = generic_setxattr,
c4803c49 8895 .listxattr = nfs4_listxattr,
64c2ce8b 8896 .removexattr = generic_removexattr,
6b3b5496
BF		 8897};
8898
509de811 8899const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8900 .version = 4, /* protocol version */
8901 .dentry_ops = &nfs4_dentry_operations,
8902 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8903 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8904 .file_ops = &nfs4_file_operations,
1da177e4 8905 .getroot = nfs4_proc_get_root,
281cad46 8906 .submount = nfs4_submount,
ff9099f2 8907 .try_mount = nfs4_try_mount,
1da177e4
LT		 8908 .getattr = nfs4_proc_getattr,
8909 .setattr = nfs4_proc_setattr,
8910 .lookup = nfs4_proc_lookup,
8911 .access = nfs4_proc_access,
8912 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8913 .create = nfs4_proc_create,
8914 .remove = nfs4_proc_remove,
8915 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8916 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8917 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8918 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8919 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8920 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8921 .link = nfs4_proc_link,
8922 .symlink = nfs4_proc_symlink,
8923 .mkdir = nfs4_proc_mkdir,
8924 .rmdir = nfs4_proc_remove,
8925 .readdir = nfs4_proc_readdir,
8926 .mknod = nfs4_proc_mknod,
8927 .statfs = nfs4_proc_statfs,
8928 .fsinfo = nfs4_proc_fsinfo,
8929 .pathconf = nfs4_proc_pathconf,
e9326dca 8930 .set_capabilities = nfs4_server_capabilities,
1da177e4 8931 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8932 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8933 .read_setup = nfs4_proc_read_setup,
ec06c096 8934 .read_done = nfs4_read_done,
1da177e4 8935 .write_setup = nfs4_proc_write_setup,
788e7a89 8936 .write_done = nfs4_write_done,
1da177e4 8937 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8938 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8939 .commit_done = nfs4_commit_done,
1da177e4 8940 .lock = nfs4_proc_lock,
e50a1c2e 8941 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8942 .close_context = nfs4_close_context,
2b484297 8943 .open_context = nfs4_atomic_open,
011e2a7f 8944 .have_delegation = nfs4_have_delegation,
57ec14c5 8945 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8946 .alloc_client = nfs4_alloc_client,
45a52a02 8947 .init_client = nfs4_init_client,
cdb7eced 8948 .free_client = nfs4_free_client,
1179acc6
BS		 8949 .create_server = nfs4_create_server,
8950 .clone_server = nfs_clone_server,
1da177e4
LT		 8951};
8952
64c2ce8b 8953static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
98e9cb57 8954 .name = XATTR_NAME_NFSV4_ACL,
64c2ce8b
AK		 8955 .list = nfs4_xattr_list_nfs4_acl,
8956 .get = nfs4_xattr_get_nfs4_acl,
8957 .set = nfs4_xattr_set_nfs4_acl,
8958};
8959
8960const struct xattr_handler *nfs4_xattr_handlers[] = {
8961 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8962#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8963 &nfs4_xattr_nfs4_label_handler,
8964#endif
64c2ce8b
AK		 8965 NULL
8966};
8967
1da177e4
LT		 8968/*
8969 * Local variables:
8970 * c-basic-offset: 8
8971 * End:
8972 */
Linux 6.x block layer and io_uring tree(s)