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Merge remote-tracking branch 'xen-tip/linux-next'
[deliverable/linux.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 636
2e80dbe7 637static void nfs40_sequence_free_slot(struct nfs4_sequence_res *res)
3bd2384a
CL		 638{
639 struct nfs4_slot *slot = res->sr_slot;
640 struct nfs4_slot_table *tbl;
641
3bd2384a
CL		 642 tbl = slot->table;
643 spin_lock(&tbl->slot_tbl_lock);
644 if (!nfs41_wake_and_assign_slot(tbl, slot))
645 nfs4_free_slot(tbl, slot);
646 spin_unlock(&tbl->slot_tbl_lock);
647
648 res->sr_slot = NULL;
2e80dbe7
TM		 649}
650
651static int nfs40_sequence_done(struct rpc_task *task,
652 struct nfs4_sequence_res *res)
653{
654 if (res->sr_slot != NULL)
655 nfs40_sequence_free_slot(res);
3bd2384a
CL		 656 return 1;
657}
658
cccef3b9
AA		 659#if defined(CONFIG_NFS_V4_1)
660
d185a334 661static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 662{
e3725ec0 663 struct nfs4_session *session;
13615871 664 struct nfs4_slot_table *tbl;
a13ce7c6 665 struct nfs4_slot *slot = res->sr_slot;
c10e4498 666 bool send_new_highest_used_slotid = false;
13615871 667
a13ce7c6 668 tbl = slot->table;
e3725ec0 669 session = tbl->session;
ea028ac9 670
07e8dcbd
TM		 671 /* Bump the slot sequence number */
672 if (slot->seq_done)
673 slot->seq_nr++;
674 slot->seq_done = 0;
675
35dc1d74 676 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 677 /* Be nice to the server: try to ensure that the last transmitted
678 * value for highest_user_slotid <= target_highest_slotid
679 */
680 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
681 send_new_highest_used_slotid = true;
682
a13ce7c6 683 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 684 send_new_highest_used_slotid = false;
685 goto out_unlock;
686 }
a13ce7c6 687 nfs4_free_slot(tbl, slot);
c10e4498
TM		 688
689 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
690 send_new_highest_used_slotid = false;
b75ad4cd 691out_unlock:
35dc1d74 692 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 693 res->sr_slot = NULL;
c10e4498 694 if (send_new_highest_used_slotid)
3f10a6af 695 nfs41_notify_server(session->clp);
045d2a6d
TM		 696 if (waitqueue_active(&tbl->slot_waitq))
697 wake_up_all(&tbl->slot_waitq);
13615871
AA		 698}
699
2e80dbe7
TM		 700static int nfs41_sequence_process(struct rpc_task *task,
701 struct nfs4_sequence_res *res)
b0df806c 702{
e3725ec0 703 struct nfs4_session *session;
a13ce7c6 704 struct nfs4_slot *slot = res->sr_slot;
14516c3a 705 struct nfs_client *clp;
ac20d163 706 bool interrupted = false;
85563073 707 int ret = 1;
b0df806c 708
a13ce7c6
TM		 709 if (slot == NULL)
710 goto out_noaction;
468f8613
BS		 711 /* don't increment the sequence number if the task wasn't sent */
712 if (!RPC_WAS_SENT(task))
b0df806c
AA		 713 goto out;
714
e3725ec0 715 session = slot->table->session;
933602e3 716
ac20d163
TM		 717 if (slot->interrupted) {
718 slot->interrupted = 0;
719 interrupted = true;
720 }
721
2f92ae34 722 trace_nfs4_sequence_done(session, res);
691daf3b 723 /* Check the SEQUENCE operation status */
14516c3a
TM		 724 switch (res->sr_status) {
725 case 0:
b0df806c 726 /* Update the slot's sequence and clientid lease timer */
07e8dcbd 727 slot->seq_done = 1;
e3725ec0 728 clp = session->clp;
8e63b6a8 729 do_renew_lease(clp, res->sr_timestamp);
0629e370 730 /* Check sequence flags */
b15c7cdd 731 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
464ee9f9 732 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 733 break;
ac20d163
TM		 734 case 1:
735 /*
736 * sr_status remains 1 if an RPC level error occurred.
737 * The server may or may not have processed the sequence
738 * operation..
739 * Mark the slot as having hosted an interrupted RPC call.
740 */
741 slot->interrupted = 1;
742 goto out;
14516c3a
TM		 743 case -NFS4ERR_DELAY:
744 /* The server detected a resend of the RPC call and
745 * returned NFS4ERR_DELAY as per Section 2.10.6.2
746 * of RFC5661.
747 */
df2fabff 748 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 749 __func__,
df2fabff 750 slot->slot_nr,
933602e3 751 slot->seq_nr);
14516c3a 752 goto out_retry;
85563073
TM		 753 case -NFS4ERR_BADSLOT:
754 /*
755 * The slot id we used was probably retired. Try again
756 * using a different slot id.
757 */
e8794440
TM		 758 goto retry_nowait;
759 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 760 /*
761 * Was the last operation on this sequence interrupted?
762 * If so, retry after bumping the sequence number.
763 */
764 if (interrupted) {
765 ++slot->seq_nr;
766 goto retry_nowait;
767 }
e8794440
TM		 768 /*
769 * Could this slot have been previously retired?
770 * If so, then the server may be expecting seq_nr = 1!
771 */
8e63b6a8
TM		 772 if (slot->seq_nr != 1) {
773 slot->seq_nr = 1;
774 goto retry_nowait;
775 }
776 break;
e8794440
TM		 777 case -NFS4ERR_SEQ_FALSE_RETRY:
778 ++slot->seq_nr;
779 goto retry_nowait;
14516c3a
TM		 780 default:
781 /* Just update the slot sequence no. */
07e8dcbd 782 slot->seq_done = 1;
b0df806c
AA		 783 }
784out:
785 /* The session may be reset by one of the error handlers. */
786 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
a13ce7c6 787out_noaction:
85563073 788 return ret;
e8794440
TM		 789retry_nowait:
790 if (rpc_restart_call_prepare(task)) {
2e80dbe7 791 nfs41_sequence_free_slot(res);
e8794440
TM		 792 task->tk_status = 0;
793 ret = 0;
794 }
795 goto out;
14516c3a 796out_retry:
d05dd4e9 797 if (!rpc_restart_call(task))
14516c3a
TM		 798 goto out;
799 rpc_delay(task, NFS4_POLL_RETRY_MAX);
800 return 0;
b0df806c 801}
2e80dbe7
TM		 802
803int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
804{
805 if (!nfs41_sequence_process(task, res))
806 return 0;
807 if (res->sr_slot != NULL)
808 nfs41_sequence_free_slot(res);
809 return 1;
810
811}
f9c96fcc 812EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 813
2e80dbe7
TM		 814static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
815{
816 if (res->sr_slot == NULL)
817 return 1;
818 if (res->sr_slot->table->session != NULL)
819 return nfs41_sequence_process(task, res);
820 return nfs40_sequence_done(task, res);
821}
822
823static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
824{
825 if (res->sr_slot != NULL) {
826 if (res->sr_slot->table->session != NULL)
827 nfs41_sequence_free_slot(res);
828 else
829 nfs40_sequence_free_slot(res);
830 }
831}
832
2c4b131d 833int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 834{
e3725ec0 835 if (res->sr_slot == NULL)
14516c3a 836 return 1;
3bd2384a
CL		 837 if (!res->sr_slot->table->session)
838 return nfs40_sequence_done(task, res);
14516c3a 839 return nfs41_sequence_done(task, res);
df896455 840}
2c4b131d 841EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 842
dc70d7b3 843int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 844 struct nfs4_sequence_args *args,
845 struct nfs4_sequence_res *res,
ce5039c1
AA		 846 struct rpc_task *task)
847{
fbcd4abc
AA		 848 struct nfs4_slot *slot;
849 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 850
851 dprintk("--> %s\n", __func__);
ce5039c1 852 /* slot already allocated? */
dfb4f309 853 if (res->sr_slot != NULL)
d9afbd1b 854 goto out_success;
ce5039c1 855
fbcd4abc
AA		 856 tbl = &session->fc_slot_table;
857
69d206b5
TM		 858 task->tk_timeout = 0;
859
fbcd4abc 860 spin_lock(&tbl->slot_tbl_lock);
774d5f14 861 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 862 !args->sa_privileged) {
0b1c8fc4 863 /* The state manager will wait until the slot table is empty */
0b1c8fc4 864 dprintk("%s session is draining\n", __func__);
7b939a3f 865 goto out_sleep;
689cf5c1
AB		 866 }
867
2dc03b7f 868 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 869 if (IS_ERR(slot)) {
870 /* If out of memory, try again in 1/4 second */
871 if (slot == ERR_PTR(-ENOMEM))
872 task->tk_timeout = HZ >> 2;
fbcd4abc 873 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 874 goto out_sleep;
fbcd4abc
AA		 875 }
876 spin_unlock(&tbl->slot_tbl_lock);
877
2b2fa717 878 args->sa_slot = slot;
fbcd4abc 879
e8d92382 880 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 881 slot->slot_nr, slot->seq_nr);
fbcd4abc 882
dfb4f309 883 res->sr_slot = slot;
8e63b6a8 884 res->sr_timestamp = jiffies;
2a6e26cd 885 res->sr_status_flags = 0;
fbcd4abc
AA		 886 /*
887 * sr_status is only set in decode_sequence, and so will remain
888 * set to 1 if an rpc level failure occurs.
889 */
890 res->sr_status = 1;
2f92ae34 891 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 892out_success:
893 rpc_call_start(task);
ce5039c1 894 return 0;
7b939a3f 895out_sleep:
8fe72bac
TM		 896 /* Privileged tasks are queued with top priority */
897 if (args->sa_privileged)
1e1093c7
TM		 898 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
899 NULL, RPC_PRIORITY_PRIVILEGED);
900 else
901 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 902 spin_unlock(&tbl->slot_tbl_lock);
903 return -EAGAIN;
ce5039c1 904}
dc70d7b3 905EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 906
5a580e0a
CL		 907static int nfs4_setup_sequence(const struct nfs_server *server,
908 struct nfs4_sequence_args *args,
909 struct nfs4_sequence_res *res,
910 struct rpc_task *task)
ce5039c1 911{
035168ab 912 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 913 int ret = 0;
914
3bd2384a 915 if (!session)
cb04ad2a
PT		 916 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
917 args, res, task);
035168ab 918
e8d92382 919 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 920 __func__, session->clp, session, res->sr_slot ?
e8d92382 921 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 922
9d12b216 923 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 924
ce5039c1
AA		 925 dprintk("<-- %s status=%d\n", __func__, ret);
926 return ret;
927}
928
ce5039c1
AA		 929static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
930{
2a3eb2b9 931 struct nfs4_call_sync_data *data = calldata;
6ba7db34 932 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 933
035168ab
TM		 934 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
935
d9afbd1b 936 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 937}
938
69ab40c4
AA		 939static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
940{
2a3eb2b9 941 struct nfs4_call_sync_data *data = calldata;
69ab40c4 942
14516c3a 943 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 944}
945
17280175 946static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 947 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 948 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 949};
950
3bd2384a
CL		 951#else /* !CONFIG_NFS_V4_1 */
952
9915ea7e
CL		 953static int nfs4_setup_sequence(const struct nfs_server *server,
954 struct nfs4_sequence_args *args,
955 struct nfs4_sequence_res *res,
956 struct rpc_task *task)
957{
cb04ad2a
PT		 958 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
959 args, res, task);
9915ea7e
CL		 960}
961
2e80dbe7
TM		 962static int nfs4_sequence_process(struct rpc_task *task, struct nfs4_sequence_res *res)
963{
964 return nfs40_sequence_done(task, res);
965}
966
967static void nfs4_sequence_free_slot(struct nfs4_sequence_res *res)
968{
969 if (res->sr_slot != NULL)
970 nfs40_sequence_free_slot(res);
971}
972
2c4b131d
PT		 973int nfs4_sequence_done(struct rpc_task *task,
974 struct nfs4_sequence_res *res)
9915ea7e 975{
3bd2384a 976 return nfs40_sequence_done(task, res);
9915ea7e 977}
2c4b131d 978EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 979
980#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 981
982static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
983{
984 struct nfs4_call_sync_data *data = calldata;
985 nfs4_setup_sequence(data->seq_server,
986 data->seq_args, data->seq_res, task);
987}
988
989static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
990{
991 struct nfs4_call_sync_data *data = calldata;
992 nfs4_sequence_done(task, data->seq_res);
993}
994
995static const struct rpc_call_ops nfs40_call_sync_ops = {
996 .rpc_call_prepare = nfs40_call_sync_prepare,
997 .rpc_call_done = nfs40_call_sync_done,
998};
999
7c513058
BS		 1000static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
1001 struct nfs_server *server,
ce5039c1
AA		 1002 struct rpc_message *msg,
1003 struct nfs4_sequence_args *args,
8fe72bac 1004 struct nfs4_sequence_res *res)
ce5039c1
AA		 1005{
1006 int ret;
1007 struct rpc_task *task;
9915ea7e 1008 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 1009 struct nfs4_call_sync_data data = {
035168ab 1010 .seq_server = server,
ce5039c1
AA		 1011 .seq_args = args,
1012 .seq_res = res,
ce5039c1
AA		 1013 };
1014 struct rpc_task_setup task_setup = {
7c513058 1015 .rpc_client = clnt,
ce5039c1 1016 .rpc_message = msg,
9915ea7e 1017 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 1018 .callback_data = &data
1019 };
1020
ce5039c1
AA		 1021 task = rpc_run_task(&task_setup);
1022 if (IS_ERR(task))
1023 ret = PTR_ERR(task);
1024 else {
1025 ret = task->tk_status;
1026 rpc_put_task(task);
1027 }
1028 return ret;
1029}
1030
7c513058
BS		 1031int nfs4_call_sync(struct rpc_clnt *clnt,
1032 struct nfs_server *server,
e73b83f2
BS		 1033 struct rpc_message *msg,
1034 struct nfs4_sequence_args *args,
1035 struct nfs4_sequence_res *res,
1036 int cache_reply)
1037{
a9c92d6b 1038 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 1039 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 1040}
cccef3b9 1041
38478b24 1042static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 1043{
38478b24 1044 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 1045
38478b24 1046 spin_lock(&dir->i_lock);
359d7d1c 1047 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 1048 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 1049 nfs_force_lookup_revalidate(dir);
a9a4a87a 1050 dir->i_version = cinfo->after;
3235b403 1051 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
de242c0b 1052 nfs_fscache_invalidate(dir);
38478b24 1053 spin_unlock(&dir->i_lock);
1da177e4
LT		 1054}
1055
e56e0b78 1056struct nfs4_opendata {
c6d00e63 1057 struct kref kref;
e56e0b78
TM		 1058 struct nfs_openargs o_arg;
1059 struct nfs_openres o_res;
cdd4e68b
TM		 1060 struct nfs_open_confirmargs c_arg;
1061 struct nfs_open_confirmres c_res;
6926afd1
TM		 1062 struct nfs4_string owner_name;
1063 struct nfs4_string group_name;
a49c2691 1064 struct nfs4_label *a_label;
e56e0b78 1065 struct nfs_fattr f_attr;
1775fd3e 1066 struct nfs4_label *f_label;
e56e0b78 1067 struct dentry *dir;
82a2c1b7 1068 struct dentry *dentry;
e56e0b78 1069 struct nfs4_state_owner *owner;
aac00a8d 1070 struct nfs4_state *state;
e56e0b78 1071 struct iattr attrs;
26e976a8 1072 unsigned long timestamp;
3e309914 1073 unsigned int rpc_done : 1;
5bc2afc2 1074 unsigned int file_created : 1;
bdeca1b7 1075 unsigned int is_recover : 1;
24ac23ab
TM		 1076 int rpc_status;
1077 int cancelled;
e56e0b78
TM		 1078};
1079
49f9a0fa
TM		 1080static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1081 int err, struct nfs4_exception *exception)
1082{
1083 if (err != -EINVAL)
1084 return false;
1085 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1086 return false;
1087 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1088 exception->retry = 1;
1089 return true;
1090}
1091
6ae37339
TM		 1092static u32
1093nfs4_map_atomic_open_share(struct nfs_server *server,
1094 fmode_t fmode, int openflags)
1095{
1096 u32 res = 0;
1097
1098 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1099 case FMODE_READ:
1100 res = NFS4_SHARE_ACCESS_READ;
1101 break;
1102 case FMODE_WRITE:
1103 res = NFS4_SHARE_ACCESS_WRITE;
1104 break;
1105 case FMODE_READ|FMODE_WRITE:
1106 res = NFS4_SHARE_ACCESS_BOTH;
1107 }
1108 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1109 goto out;
1110 /* Want no delegation if we're using O_DIRECT */
1111 if (openflags & O_DIRECT)
1112 res |= NFS4_SHARE_WANT_NO_DELEG;
1113out:
1114 return res;
1115}
1116
49f9a0fa
TM		 1117static enum open_claim_type4
1118nfs4_map_atomic_open_claim(struct nfs_server *server,
1119 enum open_claim_type4 claim)
1120{
1121 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1122 return claim;
1123 switch (claim) {
1124 default:
1125 return claim;
1126 case NFS4_OPEN_CLAIM_FH:
1127 return NFS4_OPEN_CLAIM_NULL;
1128 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1129 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1130 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1131 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1132 }
1133}
2ced46c2
TM		 1134
1135static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1136{
1137 p->o_res.f_attr = &p->f_attr;
1775fd3e 1138 p->o_res.f_label = p->f_label;
c1d51931
TM		 1139 p->o_res.seqid = p->o_arg.seqid;
1140 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 1141 p->o_res.server = p->o_arg.server;
5f657530 1142 p->o_res.access_request = p->o_arg.access;
2ced46c2 1143 nfs_fattr_init(&p->f_attr);
6926afd1 1144 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 1145}
1146
82a2c1b7 1147static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 1148 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 1149 const struct iattr *attrs,
1775fd3e 1150 struct nfs4_label *label,
4a1c0893 1151 enum open_claim_type4 claim,
8535b2be 1152 gfp_t gfp_mask)
e56e0b78 1153{
82a2c1b7 1154 struct dentry *parent = dget_parent(dentry);
2b0143b5 1155 struct inode *dir = d_inode(parent);
e56e0b78 1156 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1157 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 1158 struct nfs4_opendata *p;
1159
8535b2be 1160 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1161 if (p == NULL)
1162 goto err;
14c43f76
DQ		 1163
1164 p->f_label = nfs4_label_alloc(server, gfp_mask);
1165 if (IS_ERR(p->f_label))
1166 goto err_free_p;
1167
a49c2691
KM		 1168 p->a_label = nfs4_label_alloc(server, gfp_mask);
1169 if (IS_ERR(p->a_label))
1170 goto err_free_f;
1171
63f5f796
TM		 1172 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1173 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1174 if (IS_ERR(p->o_arg.seqid))
14c43f76 1175 goto err_free_label;
82a2c1b7
AV		 1176 nfs_sb_active(dentry->d_sb);
1177 p->dentry = dget(dentry);
e56e0b78
TM		 1178 p->dir = parent;
1179 p->owner = sp;
1180 atomic_inc(&sp->so_count);
dc0b027d
TM		 1181 p->o_arg.open_flags = flags;
1182 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
6ae37339
TM		 1183 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1184 fmode, flags);
ae2bb032
WAA		 1185 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1186 * will return permission denied for all bits until close */
1187 if (!(flags & O_EXCL)) {
1188 /* ask server to check for all possible rights as results
1189 * are cached */
1190 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1191 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1192 }
7539bbab 1193 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1194 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1195 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1196 p->o_arg.name = &dentry->d_name;
e56e0b78 1197 p->o_arg.server = server;
aa9c2669 1198 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1199 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
a49c2691 1200 p->o_arg.label = nfs4_label_copy(p->a_label, label);
49f9a0fa
TM		 1201 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1202 switch (p->o_arg.claim) {
4a1c0893
TM		 1203 case NFS4_OPEN_CLAIM_NULL:
1204 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1205 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1206 p->o_arg.fh = NFS_FH(dir);
1207 break;
1208 case NFS4_OPEN_CLAIM_PREVIOUS:
1209 case NFS4_OPEN_CLAIM_FH:
1210 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1211 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1212 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1213 }
536e43d1 1214 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1215 __u32 verf[2];
d77d76ff 1216
e56e0b78
TM		 1217 p->o_arg.u.attrs = &p->attrs;
1218 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1219
1220 verf[0] = jiffies;
1221 verf[1] = current->pid;
1222 memcpy(p->o_arg.u.verifier.data, verf,
1223 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1224 }
cdd4e68b
TM		 1225 p->c_arg.fh = &p->o_res.fh;
1226 p->c_arg.stateid = &p->o_res.stateid;
1227 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1228 nfs4_init_opendata_res(p);
c6d00e63 1229 kref_init(&p->kref);
e56e0b78 1230 return p;
14c43f76
DQ		 1231
1232err_free_label:
a49c2691
KM		 1233 nfs4_label_free(p->a_label);
1234err_free_f:
14c43f76
DQ		 1235 nfs4_label_free(p->f_label);
1236err_free_p:
e56e0b78
TM		 1237 kfree(p);
1238err:
1239 dput(parent);
1240 return NULL;
1241}
1242
c6d00e63 1243static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1244{
c6d00e63
TM		 1245 struct nfs4_opendata *p = container_of(kref,
1246 struct nfs4_opendata, kref);
82a2c1b7 1247 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1248
1249 nfs_free_seqid(p->o_arg.seqid);
2e80dbe7 1250 nfs4_sequence_free_slot(&p->o_res.seq_res);
aac00a8d
TM		 1251 if (p->state != NULL)
1252 nfs4_put_open_state(p->state);
c6d00e63 1253 nfs4_put_state_owner(p->owner);
14c43f76 1254
a49c2691 1255 nfs4_label_free(p->a_label);
14c43f76
DQ		 1256 nfs4_label_free(p->f_label);
1257
c6d00e63 1258 dput(p->dir);
82a2c1b7
AV		 1259 dput(p->dentry);
1260 nfs_sb_deactive(sb);
6926afd1 1261 nfs_fattr_free_names(&p->f_attr);
e911b815 1262 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1263 kfree(p);
1264}
1265
1266static void nfs4_opendata_put(struct nfs4_opendata *p)
1267{
1268 if (p != NULL)
1269 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1270}
1271
06f814a3
TM		 1272static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1273{
06f814a3
TM		 1274 int ret;
1275
06f814a3 1276 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1277 return ret;
1278}
1279
24311f88
TM		 1280static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1281 fmode_t fmode)
1282{
1283 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1284 case FMODE_READ|FMODE_WRITE:
1285 return state->n_rdwr != 0;
1286 case FMODE_WRITE:
1287 return state->n_wronly != 0;
1288 case FMODE_READ:
1289 return state->n_rdonly != 0;
1290 }
1291 WARN_ON_ONCE(1);
1292 return false;
1293}
1294
dc0b027d 1295static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1296{
1297 int ret = 0;
dc0b027d 1298
536e43d1 1299 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1300 goto out;
1301 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1302 case FMODE_READ:
88069f77
TM		 1303 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1304 && state->n_rdonly != 0;
6ee41268
TM		 1305 break;
1306 case FMODE_WRITE:
88069f77
TM		 1307 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1308 && state->n_wronly != 0;
6ee41268
TM		 1309 break;
1310 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1311 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1312 && state->n_rdwr != 0;
6ee41268 1313 }
dc0b027d 1314out:
6ee41268
TM		 1315 return ret;
1316}
1317
2a606188
TM		 1318static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1319 enum open_claim_type4 claim)
aac00a8d 1320{
652f89f6
TM		 1321 if (delegation == NULL)
1322 return 0;
dc0b027d 1323 if ((delegation->type & fmode) != fmode)
aac00a8d 1324 return 0;
d25be546
TM		 1325 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1326 return 0;
2a606188
TM		 1327 switch (claim) {
1328 case NFS4_OPEN_CLAIM_NULL:
1329 case NFS4_OPEN_CLAIM_FH:
1330 break;
1331 case NFS4_OPEN_CLAIM_PREVIOUS:
1332 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1333 break;
1334 default:
1335 return 0;
1336 }
b7391f44 1337 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1338 return 1;
1339}
1340
dc0b027d 1341static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1342{
dc0b027d 1343 switch (fmode) {
e7616923
TM		 1344 case FMODE_WRITE:
1345 state->n_wronly++;
1346 break;
1347 case FMODE_READ:
1348 state->n_rdonly++;
1349 break;
1350 case FMODE_READ|FMODE_WRITE:
1351 state->n_rdwr++;
1352 }
dc0b027d 1353 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1354}
1355
4f14c194
TM		 1356static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1357{
1358 struct nfs_client *clp = state->owner->so_server->nfs_client;
1359 bool need_recover = false;
1360
1361 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1362 need_recover = true;
1363 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1364 need_recover = true;
1365 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1366 need_recover = true;
1367 if (need_recover)
1368 nfs4_state_mark_reclaim_nograce(clp, state);
1369}
1370
e999e80e
TM		 1371static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1372 nfs4_stateid *stateid)
1373{
1374 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1375 return true;
4f14c194
TM		 1376 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1377 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1378 return true;
4f14c194 1379 }
e999e80e
TM		 1380 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1381 return true;
1382 return false;
1383}
1384
f95549cf
TM		 1385static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1386{
3c38cbe2
TM		 1387 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1388 return;
f95549cf
TM		 1389 if (state->n_wronly)
1390 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1391 if (state->n_rdonly)
1392 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1393 if (state->n_rdwr)
1394 set_bit(NFS_O_RDWR_STATE, &state->flags);
3c38cbe2 1395 set_bit(NFS_OPEN_STATE, &state->flags);
f95549cf
TM		 1396}
1397
226056c5 1398static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
4a1e2feb 1399 nfs4_stateid *arg_stateid,
226056c5 1400 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1401{
226056c5
TM		 1402 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1403 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1404 case FMODE_WRITE:
1405 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1406 break;
1407 case FMODE_READ:
1408 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1409 break;
1410 case 0:
1411 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1412 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1413 clear_bit(NFS_OPEN_STATE, &state->flags);
1414 }
1415 if (stateid == NULL)
1416 return;
f95549cf 1417 /* Handle races with OPEN */
4a1e2feb
TM		 1418 if (!nfs4_stateid_match_other(arg_stateid, &state->open_stateid) ||
1419 (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1420 !nfs4_stateid_is_newer(stateid, &state->open_stateid))) {
f95549cf 1421 nfs_resync_open_stateid_locked(state);
226056c5 1422 return;
f95549cf 1423 }
003707c7 1424 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1425 nfs4_stateid_copy(&state->stateid, stateid);
1426 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1427}
1428
4a1e2feb
TM		 1429static void nfs_clear_open_stateid(struct nfs4_state *state,
1430 nfs4_stateid *arg_stateid,
1431 nfs4_stateid *stateid, fmode_t fmode)
226056c5
TM		 1432{
1433 write_seqlock(&state->seqlock);
4a1e2feb 1434 nfs_clear_open_stateid_locked(state, arg_stateid, stateid, fmode);
226056c5 1435 write_sequnlock(&state->seqlock);
4f14c194
TM		 1436 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1437 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1438}
1439
dc0b027d 1440static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1441{
dc0b027d 1442 switch (fmode) {
003707c7
TM		 1443 case FMODE_READ:
1444 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1445 break;
1446 case FMODE_WRITE:
1447 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1448 break;
1449 case FMODE_READ|FMODE_WRITE:
1450 set_bit(NFS_O_RDWR_STATE, &state->flags);
1451 }
e999e80e
TM		 1452 if (!nfs_need_update_open_stateid(state, stateid))
1453 return;
1454 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1455 nfs4_stateid_copy(&state->stateid, stateid);
1456 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1457}
1458
dc0b027d 1459static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1460{
8bda4e4c
TM		 1461 /*
1462 * Protect the call to nfs4_state_set_mode_locked and
1463 * serialise the stateid update
1464 */
361cad3c 1465 spin_lock(&state->owner->so_lock);
8bda4e4c 1466 write_seqlock(&state->seqlock);
003707c7 1467 if (deleg_stateid != NULL) {
f597c537 1468 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1469 set_bit(NFS_DELEGATED_STATE, &state->flags);
1470 }
1471 if (open_stateid != NULL)
dc0b027d 1472 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c 1473 write_sequnlock(&state->seqlock);
dc0b027d 1474 update_open_stateflags(state, fmode);
ec073428 1475 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1476}
1477
dc0b027d 1478static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1479{
1480 struct nfs_inode *nfsi = NFS_I(state->inode);
1481 struct nfs_delegation *deleg_cur;
1482 int ret = 0;
1483
dc0b027d 1484 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1485
1486 rcu_read_lock();
1487 deleg_cur = rcu_dereference(nfsi->delegation);
1488 if (deleg_cur == NULL)
1489 goto no_delegation;
1490
1491 spin_lock(&deleg_cur->lock);
17f26b12 1492 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1493 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1494 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1495 goto no_delegation_unlock;
1496
1497 if (delegation == NULL)
1498 delegation = &deleg_cur->stateid;
f597c537 1499 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1500 goto no_delegation_unlock;
1501
b7391f44 1502 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1503 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1504 ret = 1;
1505no_delegation_unlock:
1506 spin_unlock(&deleg_cur->lock);
1507no_delegation:
1508 rcu_read_unlock();
1509
1510 if (!ret && open_stateid != NULL) {
dc0b027d 1511 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1512 ret = 1;
1513 }
4f14c194
TM		 1514 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1515 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1516
1517 return ret;
1518}
1519
39071e6f
TM		 1520static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1521 const nfs4_stateid *stateid)
1522{
1523 struct nfs4_state *state = lsp->ls_state;
1524 bool ret = false;
1525
1526 spin_lock(&state->state_lock);
1527 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1528 goto out_noupdate;
1529 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1530 goto out_noupdate;
1531 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1532 ret = true;
1533out_noupdate:
1534 spin_unlock(&state->state_lock);
1535 return ret;
1536}
34310430 1537
dc0b027d 1538static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1539{
1540 struct nfs_delegation *delegation;
1541
1542 rcu_read_lock();
1543 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1544 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1545 rcu_read_unlock();
1546 return;
1547 }
1548 rcu_read_unlock();
57ec14c5 1549 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1550}
1551
6ee41268 1552static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1553{
1554 struct nfs4_state *state = opendata->state;
1555 struct nfs_inode *nfsi = NFS_I(state->inode);
1556 struct nfs_delegation *delegation;
f448badd 1557 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1558 fmode_t fmode = opendata->o_arg.fmode;
2a606188 1559 enum open_claim_type4 claim = opendata->o_arg.claim;
aac00a8d
TM		 1560 nfs4_stateid stateid;
1561 int ret = -EAGAIN;
1562
aac00a8d 1563 for (;;) {
61beef75 1564 spin_lock(&state->owner->so_lock);
dc0b027d 1565 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1566 update_open_stateflags(state, fmode);
6ee41268 1567 spin_unlock(&state->owner->so_lock);
61beef75 1568 goto out_return_state;
6ee41268 1569 }
61beef75 1570 spin_unlock(&state->owner->so_lock);
34310430
TM		 1571 rcu_read_lock();
1572 delegation = rcu_dereference(nfsi->delegation);
2a606188 1573 if (!can_open_delegated(delegation, fmode, claim)) {
34310430 1574 rcu_read_unlock();
aac00a8d 1575 break;
34310430 1576 }
aac00a8d 1577 /* Save the delegation */
f597c537 1578 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1579 rcu_read_unlock();
fa332941 1580 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1581 if (!opendata->is_recover) {
1582 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1583 if (ret != 0)
1584 goto out;
1585 }
aac00a8d 1586 ret = -EAGAIN;
34310430
TM		 1587
1588 /* Try to update the stateid using the delegation */
dc0b027d 1589 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1590 goto out_return_state;
aac00a8d 1591 }
aac00a8d
TM		 1592out:
1593 return ERR_PTR(ret);
1594out_return_state:
1595 atomic_inc(&state->count);
1596 return state;
1597}
1598
e23008ec
AA		 1599static void
1600nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1601{
1602 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1603 struct nfs_delegation *delegation;
1604 int delegation_flags = 0;
1605
1606 rcu_read_lock();
1607 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1608 if (delegation)
1609 delegation_flags = delegation->flags;
1610 rcu_read_unlock();
72d79ff8
TM		 1611 switch (data->o_arg.claim) {
1612 default:
1613 break;
1614 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1615 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
e23008ec
AA		 1616 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1617 "returning a delegation for "
1618 "OPEN(CLAIM_DELEGATE_CUR)\n",
1619 clp->cl_hostname);
72d79ff8
TM		 1620 return;
1621 }
1622 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
e23008ec
AA		 1623 nfs_inode_set_delegation(state->inode,
1624 data->owner->so_cred,
1625 &data->o_res);
1626 else
1627 nfs_inode_reclaim_delegation(state->inode,
1628 data->owner->so_cred,
1629 &data->o_res);
1630}
1631
1632/*
1633 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1634 * and update the nfs4_state.
1635 */
1636static struct nfs4_state *
1637_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1638{
1639 struct inode *inode = data->state->inode;
1640 struct nfs4_state *state = data->state;
1641 int ret;
1642
d2bfda2e
WAA		 1643 if (!data->rpc_done) {
1644 if (data->rpc_status) {
1645 ret = data->rpc_status;
1646 goto err;
1647 }
1648 /* cached opens have already been processed */
1649 goto update;
e23008ec
AA		 1650 }
1651
e23008ec
AA		 1652 ret = nfs_refresh_inode(inode, &data->f_attr);
1653 if (ret)
1654 goto err;
1655
1656 if (data->o_res.delegation_type != 0)
1657 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1658update:
e23008ec
AA		 1659 update_open_stateid(state, &data->o_res.stateid, NULL,
1660 data->o_arg.fmode);
d49f042a 1661 atomic_inc(&state->count);
e23008ec
AA		 1662
1663 return state;
1664err:
1665 return ERR_PTR(ret);
1666
1667}
1668
1669static struct nfs4_state *
1670_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1671{
1672 struct inode *inode;
1673 struct nfs4_state *state = NULL;
1b370bc2 1674 int ret;
24ac23ab 1675
aac00a8d 1676 if (!data->rpc_done) {
6ee41268 1677 state = nfs4_try_open_cached(data);
9759b0fb 1678 trace_nfs4_cached_open(data->state);
aac00a8d
TM		 1679 goto out;
1680 }
1681
1b370bc2 1682 ret = -EAGAIN;
24ac23ab 1683 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1684 goto err;
1775fd3e 1685 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1686 ret = PTR_ERR(inode);
03f28e3a 1687 if (IS_ERR(inode))
1b370bc2
TM		 1688 goto err;
1689 ret = -ENOMEM;
24ac23ab
TM		 1690 state = nfs4_get_open_state(inode, data->owner);
1691 if (state == NULL)
1b370bc2 1692 goto err_put_inode;
e23008ec
AA		 1693 if (data->o_res.delegation_type != 0)
1694 nfs4_opendata_check_deleg(data, state);
34310430 1695 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1696 data->o_arg.fmode);
24ac23ab 1697 iput(inode);
aac00a8d 1698out:
7aa262b5 1699 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1700 return state;
1b370bc2
TM		 1701err_put_inode:
1702 iput(inode);
1703err:
1704 return ERR_PTR(ret);
24ac23ab
TM		 1705}
1706
e23008ec
AA		 1707static struct nfs4_state *
1708nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1709{
2e80dbe7
TM		 1710 struct nfs4_state *ret;
1711
e23008ec 1712 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
2e80dbe7
TM		 1713 ret =_nfs4_opendata_reclaim_to_nfs4_state(data);
1714 else
1715 ret = _nfs4_opendata_to_nfs4_state(data);
1716 nfs4_sequence_free_slot(&data->o_res.seq_res);
1717 return ret;
e23008ec
AA		 1718}
1719
864472e9
TM		 1720static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1721{
1722 struct nfs_inode *nfsi = NFS_I(state->inode);
1723 struct nfs_open_context *ctx;
1724
1725 spin_lock(&state->inode->i_lock);
1726 list_for_each_entry(ctx, &nfsi->open_files, list) {
1727 if (ctx->state != state)
1728 continue;
1729 get_nfs_open_context(ctx);
1730 spin_unlock(&state->inode->i_lock);
1731 return ctx;
1732 }
1733 spin_unlock(&state->inode->i_lock);
1734 return ERR_PTR(-ENOENT);
1735}
1736
4a1c0893
TM		 1737static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1738 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1739{
1740 struct nfs4_opendata *opendata;
1741
4a1c0893 1742 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1743 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1744 if (opendata == NULL)
1745 return ERR_PTR(-ENOMEM);
1746 opendata->state = state;
1747 atomic_inc(&state->count);
1748 return opendata;
1749}
1750
24311f88
TM		 1751static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1752 fmode_t fmode)
864472e9 1753{
2ced46c2 1754 struct nfs4_state *newstate;
864472e9
TM		 1755 int ret;
1756
24311f88 1757 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
39f897fd 1758 return 0;
dc0b027d
TM		 1759 opendata->o_arg.open_flags = 0;
1760 opendata->o_arg.fmode = fmode;
be36e185
TM		 1761 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1762 NFS_SB(opendata->dentry->d_sb),
1763 fmode, 0);
2ced46c2
TM		 1764 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1765 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1766 nfs4_init_opendata_res(opendata);
b257957e 1767 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1768 if (ret != 0)
1769 return ret;
2ced46c2 1770 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1771 if (IS_ERR(newstate))
1772 return PTR_ERR(newstate);
24311f88
TM		 1773 if (newstate != opendata->state)
1774 ret = -ESTALE;
643168c2 1775 nfs4_close_state(newstate, fmode);
24311f88 1776 return ret;
864472e9
TM		 1777}
1778
1779static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1780{
864472e9
TM		 1781 int ret;
1782
4f14c194
TM		 1783 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1784 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1785 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1786 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1787 /* memory barrier prior to reading state->n_* */
2ced46c2 1788 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1789 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9 1790 smp_rmb();
24311f88
TM		 1791 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1792 if (ret != 0)
1793 return ret;
1794 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1795 if (ret != 0)
1796 return ret;
1797 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1798 if (ret != 0)
1799 return ret;
1ac7e2fd
TM		 1800 /*
1801 * We may have performed cached opens for all three recoveries.
1802 * Check if we need to update the current stateid.
1803 */
1804 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1805 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1806 write_seqlock(&state->seqlock);
1ac7e2fd 1807 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1808 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1809 write_sequnlock(&state->seqlock);
1ac7e2fd 1810 }
864472e9
TM		 1811 return 0;
1812}
1813
1da177e4
LT		 1814/*
1815 * OPEN_RECLAIM:
1816 * reclaim state on the server after a reboot.
1da177e4 1817 */
539cd03a 1818static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1819{
1ac7e2fd 1820 struct nfs_delegation *delegation;
864472e9 1821 struct nfs4_opendata *opendata;
dc0b027d 1822 fmode_t delegation_type = 0;
1da177e4
LT		 1823 int status;
1824
4a1c0893
TM		 1825 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1826 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1827 if (IS_ERR(opendata))
1828 return PTR_ERR(opendata);
1ac7e2fd
TM		 1829 rcu_read_lock();
1830 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1831 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1832 delegation_type = delegation->type;
1ac7e2fd 1833 rcu_read_unlock();
864472e9
TM		 1834 opendata->o_arg.u.delegation_type = delegation_type;
1835 status = nfs4_open_recover(opendata, state);
c6d00e63 1836 nfs4_opendata_put(opendata);
1da177e4
LT		 1837 return status;
1838}
1839
539cd03a 1840static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1841{
1842 struct nfs_server *server = NFS_SERVER(state->inode);
1843 struct nfs4_exception exception = { };
1844 int err;
1845 do {
539cd03a 1846 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1847 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1848 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1849 continue;
168667c4 1850 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1851 break;
1852 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1853 } while (exception.retry);
1854 return err;
1855}
1856
864472e9
TM		 1857static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1858{
1859 struct nfs_open_context *ctx;
1860 int ret;
1861
1862 ctx = nfs4_state_find_open_context(state);
1863 if (IS_ERR(ctx))
91876b13 1864 return -EAGAIN;
539cd03a 1865 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1866 put_nfs_open_context(ctx);
1867 return ret;
1868}
1869
db4f2e63 1870static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1871{
be76b5b6
TM		 1872 switch (err) {
1873 default:
1874 printk(KERN_ERR "NFS: %s: unhandled error "
1875 "%d.\n", __func__, err);
1876 case 0:
1877 case -ENOENT:
8eee52af 1878 case -EAGAIN:
be76b5b6
TM		 1879 case -ESTALE:
1880 break;
1881 case -NFS4ERR_BADSESSION:
1882 case -NFS4ERR_BADSLOT:
1883 case -NFS4ERR_BAD_HIGH_SLOT:
1884 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1885 case -NFS4ERR_DEADSESSION:
1886 set_bit(NFS_DELEGATED_STATE, &state->flags);
1887 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1888 return -EAGAIN;
1889 case -NFS4ERR_STALE_CLIENTID:
1890 case -NFS4ERR_STALE_STATEID:
1891 set_bit(NFS_DELEGATED_STATE, &state->flags);
1892 case -NFS4ERR_EXPIRED:
1893 /* Don't recall a delegation if it was lost */
1894 nfs4_schedule_lease_recovery(server->nfs_client);
1895 return -EAGAIN;
352297b9
CL		 1896 case -NFS4ERR_MOVED:
1897 nfs4_schedule_migration_recovery(server);
1898 return -EAGAIN;
8ef2f8d4
CL		 1899 case -NFS4ERR_LEASE_MOVED:
1900 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1901 return -EAGAIN;
be76b5b6
TM		 1902 case -NFS4ERR_DELEG_REVOKED:
1903 case -NFS4ERR_ADMIN_REVOKED:
1904 case -NFS4ERR_BAD_STATEID:
db4f2e63 1905 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1906 nfs_inode_find_state_and_recover(state->inode,
1907 stateid);
1908 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1909 return -EAGAIN;
be76b5b6
TM		 1910 case -NFS4ERR_DELAY:
1911 case -NFS4ERR_GRACE:
1912 set_bit(NFS_DELEGATED_STATE, &state->flags);
1913 ssleep(1);
1914 return -EAGAIN;
db4f2e63
TM		 1915 case -ENOMEM:
1916 case -NFS4ERR_DENIED:
1917 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1918 return 0;
be76b5b6 1919 }
1da177e4
LT		 1920 return err;
1921}
1922
24311f88
TM		 1923int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
1924 struct nfs4_state *state, const nfs4_stateid *stateid,
1925 fmode_t type)
db4f2e63
TM		 1926{
1927 struct nfs_server *server = NFS_SERVER(state->inode);
1928 struct nfs4_opendata *opendata;
24311f88 1929 int err = 0;
db4f2e63
TM		 1930
1931 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1932 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1933 if (IS_ERR(opendata))
1934 return PTR_ERR(opendata);
1935 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
5e99b532
JL		 1936 write_seqlock(&state->seqlock);
1937 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1938 write_sequnlock(&state->seqlock);
24311f88
TM		 1939 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1940 switch (type & (FMODE_READ|FMODE_WRITE)) {
1941 case FMODE_READ|FMODE_WRITE:
1942 case FMODE_WRITE:
1943 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1944 if (err)
1945 break;
1946 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1947 if (err)
1948 break;
1949 case FMODE_READ:
1950 err = nfs4_open_recover_helper(opendata, FMODE_READ);
1951 }
db4f2e63
TM		 1952 nfs4_opendata_put(opendata);
1953 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1954}
1955
be05c860
CL		 1956static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1957{
1958 struct nfs4_opendata *data = calldata;
1959
cb04ad2a
PT		 1960 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1961 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 1962}
1963
cdd4e68b
TM		 1964static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1965{
1966 struct nfs4_opendata *data = calldata;
1967
17ead6c8 1968 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1969
cdd4e68b 1970 data->rpc_status = task->tk_status;
26e976a8 1971 if (data->rpc_status == 0) {
f597c537 1972 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1973 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1974 renew_lease(data->o_res.server, data->timestamp);
3e309914 1975 data->rpc_done = 1;
26e976a8 1976 }
cdd4e68b
TM		 1977}
1978
1979static void nfs4_open_confirm_release(void *calldata)
1980{
1981 struct nfs4_opendata *data = calldata;
1982 struct nfs4_state *state = NULL;
1983
1984 /* If this request hasn't been cancelled, do nothing */
1985 if (data->cancelled == 0)
1986 goto out_free;
1987 /* In case of error, no cleanup! */
3e309914 1988 if (!data->rpc_done)
cdd4e68b 1989 goto out_free;
cdd4e68b 1990 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1991 if (!IS_ERR(state))
643168c2 1992 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1993out_free:
c6d00e63 1994 nfs4_opendata_put(data);
cdd4e68b
TM		 1995}
1996
1997static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1998 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1999 .rpc_call_done = nfs4_open_confirm_done,
2000 .rpc_release = nfs4_open_confirm_release,
2001};
2002
2003/*
2004 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
2005 */
2006static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
2007{
2b0143b5 2008 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 2009 struct rpc_task *task;
5138fde0
TM		 2010 struct rpc_message msg = {
2011 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
2012 .rpc_argp = &data->c_arg,
2013 .rpc_resp = &data->c_res,
2014 .rpc_cred = data->owner->so_cred,
2015 };
c970aa85
TM		 2016 struct rpc_task_setup task_setup_data = {
2017 .rpc_client = server->client,
5138fde0 2018 .rpc_message = &msg,
c970aa85
TM		 2019 .callback_ops = &nfs4_open_confirm_ops,
2020 .callback_data = data,
101070ca 2021 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2022 .flags = RPC_TASK_ASYNC,
2023 };
1da177e4
LT		 2024 int status;
2025
17ead6c8 2026 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 2027 kref_get(&data->kref);
3e309914
TM		 2028 data->rpc_done = 0;
2029 data->rpc_status = 0;
5138fde0 2030 data->timestamp = jiffies;
e92c1e0d
BC		 2031 if (data->is_recover)
2032 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
c970aa85 2033 task = rpc_run_task(&task_setup_data);
7a1218a2 2034 if (IS_ERR(task))
cdd4e68b 2035 return PTR_ERR(task);
cdd4e68b
TM		 2036 status = nfs4_wait_for_completion_rpc_task(task);
2037 if (status != 0) {
2038 data->cancelled = 1;
2039 smp_wmb();
2040 } else
2041 status = data->rpc_status;
e6b3c4db 2042 rpc_put_task(task);
1da177e4
LT		 2043 return status;
2044}
2045
24ac23ab 2046static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 2047{
24ac23ab
TM		 2048 struct nfs4_opendata *data = calldata;
2049 struct nfs4_state_owner *sp = data->owner;
549b19cc 2050 struct nfs_client *clp = sp->so_server->nfs_client;
2a606188 2051 enum open_claim_type4 claim = data->o_arg.claim;
5138fde0 2052
24ac23ab 2053 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 2054 goto out_wait;
aac00a8d
TM		 2055 /*
2056 * Check if we still need to send an OPEN call, or if we can use
2057 * a delegation instead.
2058 */
2059 if (data->state != NULL) {
2060 struct nfs_delegation *delegation;
2061
dc0b027d 2062 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 2063 goto out_no_action;
aac00a8d
TM		 2064 rcu_read_lock();
2065 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2a606188 2066 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
652f89f6 2067 goto unlock_no_action;
aac00a8d
TM		 2068 rcu_read_unlock();
2069 }
95b72eb0 2070 /* Update client id. */
549b19cc 2071 data->o_arg.clientid = clp->cl_clientid;
2a606188
TM		 2072 switch (claim) {
2073 default:
2074 break;
8188df17
TM		 2075 case NFS4_OPEN_CLAIM_PREVIOUS:
2076 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2077 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 2078 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 2079 case NFS4_OPEN_CLAIM_FH:
2080 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 2081 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
2082 }
26e976a8 2083 data->timestamp = jiffies;
035168ab 2084 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 2085 &data->o_arg.seq_args,
2240a9e2
TM		 2086 &data->o_res.seq_res,
2087 task) != 0)
2088 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 2089
2090 /* Set the create mode (note dependency on the session type) */
2091 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2092 if (data->o_arg.open_flags & O_EXCL) {
2093 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2094 if (nfs4_has_persistent_session(clp))
2095 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2096 else if (clp->cl_mvops->minor_version > 0)
2097 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2098 }
6ee41268 2099 return;
652f89f6 2100unlock_no_action:
9759b0fb 2101 trace_nfs4_cached_open(data->state);
652f89f6 2102 rcu_read_unlock();
6ee41268
TM		 2103out_no_action:
2104 task->tk_action = NULL;
c8da19b9 2105out_wait:
b75ad4cd 2106 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 2107}
2108
24ac23ab
TM		 2109static void nfs4_open_done(struct rpc_task *task, void *calldata)
2110{
2111 struct nfs4_opendata *data = calldata;
1da177e4 2112
24ac23ab 2113 data->rpc_status = task->tk_status;
d898528c 2114
2e80dbe7 2115 if (!nfs4_sequence_process(task, &data->o_res.seq_res))
14516c3a 2116 return;
d898528c 2117
24ac23ab 2118 if (task->tk_status == 0) {
807d66d8
TM		 2119 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2120 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 2121 case S_IFREG:
2122 break;
2123 case S_IFLNK:
24ac23ab 2124 data->rpc_status = -ELOOP;
6f926b5b
TM		 2125 break;
2126 case S_IFDIR:
24ac23ab 2127 data->rpc_status = -EISDIR;
6f926b5b
TM		 2128 break;
2129 default:
24ac23ab 2130 data->rpc_status = -ENOTDIR;
807d66d8 2131 }
6f926b5b 2132 }
26e976a8 2133 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 2134 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2135 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 2136 }
3e309914 2137 data->rpc_done = 1;
24ac23ab 2138}
6f926b5b 2139
24ac23ab
TM		 2140static void nfs4_open_release(void *calldata)
2141{
2142 struct nfs4_opendata *data = calldata;
2143 struct nfs4_state *state = NULL;
2144
2145 /* If this request hasn't been cancelled, do nothing */
2146 if (data->cancelled == 0)
2147 goto out_free;
2148 /* In case of error, no cleanup! */
3e309914 2149 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 2150 goto out_free;
2151 /* In case we need an open_confirm, no cleanup! */
2152 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2153 goto out_free;
24ac23ab 2154 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2155 if (!IS_ERR(state))
643168c2 2156 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 2157out_free:
c6d00e63 2158 nfs4_opendata_put(data);
24ac23ab
TM		 2159}
2160
2161static const struct rpc_call_ops nfs4_open_ops = {
2162 .rpc_call_prepare = nfs4_open_prepare,
2163 .rpc_call_done = nfs4_open_done,
2164 .rpc_release = nfs4_open_release,
2165};
2166
b257957e 2167static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab 2168{
2b0143b5 2169 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 2170 struct nfs_server *server = NFS_SERVER(dir);
2171 struct nfs_openargs *o_arg = &data->o_arg;
2172 struct nfs_openres *o_res = &data->o_res;
2173 struct rpc_task *task;
5138fde0
TM		 2174 struct rpc_message msg = {
2175 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2176 .rpc_argp = o_arg,
2177 .rpc_resp = o_res,
2178 .rpc_cred = data->owner->so_cred,
2179 };
c970aa85
TM		 2180 struct rpc_task_setup task_setup_data = {
2181 .rpc_client = server->client,
5138fde0 2182 .rpc_message = &msg,
c970aa85
TM		 2183 .callback_ops = &nfs4_open_ops,
2184 .callback_data = data,
101070ca 2185 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2186 .flags = RPC_TASK_ASYNC,
2187 };
24ac23ab
TM		 2188 int status;
2189
a9c92d6b 2190 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 2191 kref_get(&data->kref);
3e309914
TM		 2192 data->rpc_done = 0;
2193 data->rpc_status = 0;
2ced46c2 2194 data->cancelled = 0;
bdeca1b7
TM		 2195 data->is_recover = 0;
2196 if (isrecover) {
8fe72bac 2197 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 2198 data->is_recover = 1;
2199 }
c970aa85 2200 task = rpc_run_task(&task_setup_data);
b257957e
AB		 2201 if (IS_ERR(task))
2202 return PTR_ERR(task);
2203 status = nfs4_wait_for_completion_rpc_task(task);
2204 if (status != 0) {
2205 data->cancelled = 1;
2206 smp_wmb();
2207 } else
2208 status = data->rpc_status;
2209 rpc_put_task(task);
2210
2211 return status;
2212}
2213
2214static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2215{
2b0143b5 2216 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2217 struct nfs_openres *o_res = &data->o_res;
2218 int status;
2219
2220 status = nfs4_run_open_task(data, 1);
2221 if (status != 0 || !data->rpc_done)
2222 return status;
2223
6926afd1
TM		 2224 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2225
b257957e
AB		 2226 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2227 status = _nfs4_proc_open_confirm(data);
2228 if (status != 0)
2229 return status;
2230 }
2231
2232 return status;
2233}
2234
f3792d63
TM		 2235/*
2236 * Additional permission checks in order to distinguish between an
2237 * open for read, and an open for execute. This works around the
2238 * fact that NFSv4 OPEN treats read and execute permissions as being
2239 * the same.
2240 * Note that in the non-execute case, we want to turn off permission
2241 * checking if we just created a new file (POSIX open() semantics).
2242 */
6168f62c
WAA		 2243static int nfs4_opendata_access(struct rpc_cred *cred,
2244 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2245 struct nfs4_state *state, fmode_t fmode,
2246 int openflags)
6168f62c
WAA		 2247{
2248 struct nfs_access_entry cache;
2249 u32 mask;
2250
2251 /* access call failed or for some reason the server doesn't
2252 * support any access modes -- defer access call until later */
2253 if (opendata->o_res.access_supported == 0)
2254 return 0;
2255
2256 mask = 0;
f3792d63
TM		 2257 /*
2258 * Use openflags to check for exec, because fmode won't
2259 * always have FMODE_EXEC set when file open for exec.
2260 */
f8d9a897
WAA		 2261 if (openflags & __FMODE_EXEC) {
2262 /* ONLY check for exec rights */
2263 mask = MAY_EXEC;
f3792d63 2264 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2265 mask = MAY_READ;
6168f62c
WAA		 2266
2267 cache.cred = cred;
2268 cache.jiffies = jiffies;
2269 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2270 nfs_access_add_cache(state->inode, &cache);
2271
bbd3a8ee 2272 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2273 return 0;
2274
2275 /* even though OPEN succeeded, access is denied. Close the file */
2276 nfs4_close_state(state, fmode);
998f40b5 2277 return -EACCES;
6168f62c
WAA		 2278}
2279
b257957e
AB		 2280/*
2281 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2282 */
2283static int _nfs4_proc_open(struct nfs4_opendata *data)
2284{
2b0143b5 2285 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2286 struct nfs_server *server = NFS_SERVER(dir);
2287 struct nfs_openargs *o_arg = &data->o_arg;
2288 struct nfs_openres *o_res = &data->o_res;
2289 int status;
2290
2291 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2292 if (!data->rpc_done)
2293 return status;
2294 if (status != 0) {
2295 if (status == -NFS4ERR_BADNAME &&
2296 !(o_arg->open_flags & O_CREAT))
2297 return -ENOENT;
24ac23ab 2298 return status;
08ef7bd3 2299 }
24ac23ab 2300
6926afd1
TM		 2301 nfs_fattr_map_and_free_names(server, &data->f_attr);
2302
5bc2afc2 2303 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2304 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2305 if (o_arg->open_flags & O_EXCL)
2306 data->file_created = 1;
2307 else if (o_res->cinfo.before != o_res->cinfo.after)
2308 data->file_created = 1;
2309 }
0df5dd4a
TM		 2310 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2311 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2312 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2313 status = _nfs4_proc_open_confirm(data);
1da177e4 2314 if (status != 0)
24ac23ab 2315 return status;
1da177e4
LT		 2316 }
2317 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2318 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2319 return 0;
1da177e4
LT		 2320}
2321
d83217c1
AA		 2322static int nfs4_recover_expired_lease(struct nfs_server *server)
2323{
2324 return nfs4_client_recover_expired_lease(server->nfs_client);
2325}
2326
1da177e4
LT		 2327/*
2328 * OPEN_EXPIRED:
2329 * reclaim state on the server after a network partition.
2330 * Assumes caller holds the appropriate lock
2331 */
539cd03a 2332static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2333{
e56e0b78 2334 struct nfs4_opendata *opendata;
864472e9 2335 int ret;
1da177e4 2336
4a1c0893 2337 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2338 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2339 if (IS_ERR(opendata))
2340 return PTR_ERR(opendata);
864472e9 2341 ret = nfs4_open_recover(opendata, state);
35d05778 2342 if (ret == -ESTALE)
3d4ff43d 2343 d_drop(ctx->dentry);
c6d00e63 2344 nfs4_opendata_put(opendata);
864472e9 2345 return ret;
1da177e4
LT		 2346}
2347
a9ed2e25 2348static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2349{
539cd03a 2350 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2351 struct nfs4_exception exception = { };
2352 int err;
2353
2354 do {
539cd03a 2355 err = _nfs4_open_expired(ctx, state);
42113a75 2356 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2357 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2358 continue;
a9ed2e25
TM		 2359 switch (err) {
2360 default:
2361 goto out;
2362 case -NFS4ERR_GRACE:
2363 case -NFS4ERR_DELAY:
2364 nfs4_handle_exception(server, err, &exception);
2365 err = 0;
2366 }
202b50dc 2367 } while (exception.retry);
a9ed2e25 2368out:
202b50dc
TM		 2369 return err;
2370}
2371
1da177e4
LT		 2372static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2373{
1da177e4 2374 struct nfs_open_context *ctx;
864472e9 2375 int ret;
1da177e4 2376
864472e9
TM		 2377 ctx = nfs4_state_find_open_context(state);
2378 if (IS_ERR(ctx))
91876b13 2379 return -EAGAIN;
539cd03a 2380 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2381 put_nfs_open_context(ctx);
2382 return ret;
1da177e4
LT		 2383}
2384
4dfd4f7a
TM		 2385static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2386{
2387 nfs_remove_bad_delegation(state->inode);
2388 write_seqlock(&state->seqlock);
2389 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2390 write_sequnlock(&state->seqlock);
2391 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2392}
2393
2394static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2395{
2396 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2397 nfs_finish_clear_delegation_stateid(state);
2398}
2399
2400static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2401{
2402 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2403 nfs40_clear_delegation_stateid(state);
2404 return nfs4_open_expired(sp, state);
2405}
2406
f062eb6c 2407#if defined(CONFIG_NFS_V4_1)
0c116cad 2408static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2409{
f062eb6c 2410 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2411 nfs4_stateid stateid;
ab7cb0df 2412 struct nfs_delegation *delegation;
0c116cad
TM		 2413 struct rpc_cred *cred;
2414 int status;
3e60ffdd 2415
ab7cb0df
TM		 2416 /* Get the delegation credential for use by test/free_stateid */
2417 rcu_read_lock();
2418 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2419 if (delegation == NULL) {
ab7cb0df 2420 rcu_read_unlock();
0c116cad
TM		 2421 return;
2422 }
2423
2424 nfs4_stateid_copy(&stateid, &delegation->stateid);
2425 cred = get_rpccred(delegation->cred);
2426 rcu_read_unlock();
2427 status = nfs41_test_stateid(server, &stateid, cred);
2428 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df 2429
3e60ffdd
CL		 2430 if (status != NFS_OK) {
2431 /* Free the stateid unless the server explicitly
2432 * informs us the stateid is unrecognized. */
2433 if (status != -NFS4ERR_BAD_STATEID)
0c116cad
TM		 2434 nfs41_free_stateid(server, &stateid, cred);
2435 nfs_finish_clear_delegation_stateid(state);
3e60ffdd 2436 }
ab7cb0df 2437
0c116cad 2438 put_rpccred(cred);
3e60ffdd
CL		 2439}
2440
2441/**
2442 * nfs41_check_open_stateid - possibly free an open stateid
2443 *
2444 * @state: NFSv4 state for an inode
2445 *
2446 * Returns NFS_OK if recovery for this stateid is now finished.
2447 * Otherwise a negative NFS4ERR value is returned.
2448 */
2449static int nfs41_check_open_stateid(struct nfs4_state *state)
2450{
2451 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2452 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2453 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2454 int status;
2455
2456 /* If a state reset has been done, test_stateid is unneeded */
2457 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2458 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2459 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2460 return -NFS4ERR_BAD_STATEID;
2461
ab7cb0df 2462 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2463 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2464 if (status != NFS_OK) {
2465 /* Free the stateid unless the server explicitly
2466 * informs us the stateid is unrecognized. */
2467 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2468 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2469
2470 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2471 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2472 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2473 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2474 }
2475 return status;
2476}
2477
2478static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2479{
eb64cf96 2480 int status;
b01dd1d8 2481
0c116cad 2482 nfs41_check_delegation_stateid(state);
3e60ffdd 2483 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2484 if (status != NFS_OK)
2485 status = nfs4_open_expired(sp, state);
2486 return status;
f062eb6c
BS		 2487}
2488#endif
2489
aa53ed54
JL		 2490/*
2491 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2492 * fields corresponding to attributes that were used to store the verifier.
2493 * Make sure we clobber those fields in the later setattr call
2494 */
5334c5bd
KM		 2495static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2496 struct iattr *sattr, struct nfs4_label **label)
aa53ed54 2497{
5334c5bd
KM		 2498 const u32 *attrset = opendata->o_res.attrset;
2499
2500 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
aa53ed54
JL		 2501 !(sattr->ia_valid & ATTR_ATIME_SET))
2502 sattr->ia_valid |= ATTR_ATIME;
2503
5334c5bd 2504 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
aa53ed54
JL		 2505 !(sattr->ia_valid & ATTR_MTIME_SET))
2506 sattr->ia_valid |= ATTR_MTIME;
5334c5bd
KM		 2507
2508 /* Except MODE, it seems harmless of setting twice. */
2509 if ((attrset[1] & FATTR4_WORD1_MODE))
2510 sattr->ia_valid &= ~ATTR_MODE;
2511
2512 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2513 *label = NULL;
aa53ed54
JL		 2514}
2515
c21443c2
TM		 2516static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2517 fmode_t fmode,
2518 int flags,
3efb9722 2519 struct nfs_open_context *ctx)
c21443c2
TM		 2520{
2521 struct nfs4_state_owner *sp = opendata->owner;
2522 struct nfs_server *server = sp->so_server;
275bb307 2523 struct dentry *dentry;
c21443c2
TM		 2524 struct nfs4_state *state;
2525 unsigned int seq;
2526 int ret;
2527
2528 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2529
2530 ret = _nfs4_proc_open(opendata);
dca78001 2531 if (ret != 0)
c21443c2
TM		 2532 goto out;
2533
2534 state = nfs4_opendata_to_nfs4_state(opendata);
2535 ret = PTR_ERR(state);
2536 if (IS_ERR(state))
2537 goto out;
2538 if (server->caps & NFS_CAP_POSIX_LOCK)
2539 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2540
275bb307 2541 dentry = opendata->dentry;
2b0143b5 2542 if (d_really_is_negative(dentry)) {
668d0cd5 2543 struct dentry *alias;
275bb307 2544 d_drop(dentry);
668d0cd5
AV		 2545 alias = d_exact_alias(dentry, state->inode);
2546 if (!alias)
2547 alias = d_splice_alias(igrab(state->inode), dentry);
2548 /* d_splice_alias() can't fail here - it's a non-directory */
2549 if (alias) {
275bb307 2550 dput(ctx->dentry);
668d0cd5 2551 ctx->dentry = dentry = alias;
275bb307
TM		 2552 }
2553 nfs_set_verifier(dentry,
2b0143b5 2554 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2555 }
2556
c21443c2
TM		 2557 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2558 if (ret != 0)
2559 goto out;
2560
3efb9722 2561 ctx->state = state;
2b0143b5 2562 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2563 nfs_inode_attach_open_context(ctx);
2564 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2565 nfs4_schedule_stateid_recovery(server, state);
2566 }
c21443c2
TM		 2567out:
2568 return ret;
2569}
2570
1da177e4 2571/*
24ac23ab 2572 * Returns a referenced nfs4_state
1da177e4 2573 */
82be417a 2574static int _nfs4_do_open(struct inode *dir,
4197a055 2575 struct nfs_open_context *ctx,
82be417a
AA		 2576 int flags,
2577 struct iattr *sattr,
5bc2afc2
TM		 2578 struct nfs4_label *label,
2579 int *opened)
1da177e4
LT		 2580{
2581 struct nfs4_state_owner *sp;
2582 struct nfs4_state *state = NULL;
2583 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2584 struct nfs4_opendata *opendata;
4197a055
TM		 2585 struct dentry *dentry = ctx->dentry;
2586 struct rpc_cred *cred = ctx->cred;
2587 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2588 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2589 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2590 struct nfs4_label *olabel = NULL;
aac00a8d 2591 int status;
1da177e4
LT		 2592
2593 /* Protect against reboot recovery conflicts */
1da177e4 2594 status = -ENOMEM;
d1e284d5
TM		 2595 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2596 if (sp == NULL) {
1da177e4
LT		 2597 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2598 goto out_err;
2599 }
58d9714a
TM		 2600 status = nfs4_recover_expired_lease(server);
2601 if (status != 0)
b4454fe1 2602 goto err_put_state_owner;
2b0143b5
DH		 2603 if (d_really_is_positive(dentry))
2604 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2605 status = -ENOMEM;
2b0143b5 2606 if (d_really_is_positive(dentry))
49f9a0fa 2607 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2608 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2609 label, claim, GFP_KERNEL);
e56e0b78 2610 if (opendata == NULL)
95d35cb4 2611 goto err_put_state_owner;
1da177e4 2612
14c43f76
DQ		 2613 if (label) {
2614 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2615 if (IS_ERR(olabel)) {
2616 status = PTR_ERR(olabel);
2617 goto err_opendata_put;
2618 }
2619 }
2620
e911b815
TM		 2621 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2622 if (!opendata->f_attr.mdsthreshold) {
2623 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2624 if (!opendata->f_attr.mdsthreshold)
2625 goto err_free_label;
2626 }
1549210f 2627 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2628 }
2b0143b5
DH		 2629 if (d_really_is_positive(dentry))
2630 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2631
3efb9722 2632 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2633 if (status != 0)
14c43f76 2634 goto err_free_label;
3efb9722 2635 state = ctx->state;
6168f62c 2636
efcbc04e 2637 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 2638 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
5334c5bd 2639 nfs4_exclusive_attrset(opendata, sattr, &label);
a1d1c4f1
TM		 2640 /*
2641 * send create attributes which was not set by open
2642 * with an extra setattr.
2643 */
2644 if (sattr->ia_valid & NFS4_VALID_ATTRS) {
2645 nfs_fattr_init(opendata->o_res.f_attr);
2646 status = nfs4_do_setattr(state->inode, cred,
2647 opendata->o_res.f_attr, sattr,
2648 state, label, olabel);
2649 if (status == 0) {
2650 nfs_setattr_update_inode(state->inode, sattr,
2651 opendata->o_res.f_attr);
2652 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2653 }
1775fd3e 2654 }
0ab64e0e 2655 }
c5c3fb5f 2656 if (opened && opendata->file_created)
5bc2afc2 2657 *opened |= FILE_CREATED;
82be417a 2658
e911b815 2659 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2660 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2661 opendata->f_attr.mdsthreshold = NULL;
2662 }
82be417a 2663
14c43f76
DQ		 2664 nfs4_label_free(olabel);
2665
c6d00e63 2666 nfs4_opendata_put(opendata);
1da177e4 2667 nfs4_put_state_owner(sp);
1da177e4 2668 return 0;
14c43f76
DQ		 2669err_free_label:
2670 nfs4_label_free(olabel);
c6d00e63
TM		 2671err_opendata_put:
2672 nfs4_opendata_put(opendata);
e56e0b78
TM		 2673err_put_state_owner:
2674 nfs4_put_state_owner(sp);
1da177e4 2675out_err:
1da177e4
LT		 2676 return status;
2677}
2678
2679
82be417a 2680static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2681 struct nfs_open_context *ctx,
82be417a
AA		 2682 int flags,
2683 struct iattr *sattr,
5bc2afc2
TM		 2684 struct nfs4_label *label,
2685 int *opened)
1da177e4 2686{
49f9a0fa 2687 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2688 struct nfs4_exception exception = { };
2689 struct nfs4_state *res;
2690 int status;
2691
2692 do {
5bc2afc2 2693 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2694 res = ctx->state;
42113a75 2695 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2696 if (status == 0)
2697 break;
2698 /* NOTE: BAD_SEQID means the server and client disagree about the
2699 * book-keeping w.r.t. state-changing operations
2700 * (OPEN/CLOSE/LOCK/LOCKU...)
2701 * It is actually a sign of a bug on the client or on the server.
2702 *
2703 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2704 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2705 * have unhashed the old state_owner for us, and that we can
2706 * therefore safely retry using a new one. We should still warn
2707 * the user though...
2708 */
2709 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2710 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2711 " returned a bad sequence-id error!\n",
2712 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2713 exception.retry = 1;
2714 continue;
2715 }
550f5747
TM		 2716 /*
2717 * BAD_STATEID on OPEN means that the server cancelled our
2718 * state before it received the OPEN_CONFIRM.
2719 * Recover by retrying the request as per the discussion
2720 * on Page 181 of RFC3530.
2721 */
2722 if (status == -NFS4ERR_BAD_STATEID) {
2723 exception.retry = 1;
2724 continue;
2725 }
aac00a8d
TM		 2726 if (status == -EAGAIN) {
2727 /* We must have found a delegation */
2728 exception.retry = 1;
2729 continue;
2730 }
49f9a0fa
TM		 2731 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2732 continue;
2733 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2734 status, &exception));
2735 } while (exception.retry);
2736 return res;
2737}
2738
8487c479
TM		 2739static int _nfs4_do_setattr(struct inode *inode,
2740 struct nfs_setattrargs *arg,
2741 struct nfs_setattrres *res,
2742 struct rpc_cred *cred,
2743 struct nfs4_state *state)
1da177e4 2744{
3e4f6290 2745 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2746 struct rpc_message msg = {
659bfcd6 2747 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
8487c479
TM		 2748 .rpc_argp = arg,
2749 .rpc_resp = res,
659bfcd6 2750 .rpc_cred = cred,
1da177e4 2751 };
abf4e13c 2752 struct rpc_cred *delegation_cred = NULL;
26e976a8 2753 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2754 fmode_t fmode;
2755 bool truncate;
65e4308d 2756 int status;
1da177e4 2757
8487c479 2758 nfs_fattr_init(res->fattr);
1da177e4 2759
ee3ae84e 2760 /* Servers should only apply open mode checks for file size changes */
8487c479 2761 truncate = (arg->iap->ia_valid & ATTR_SIZE) ? true : false;
ee3ae84e
TM		 2762 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2763
8487c479 2764 if (nfs4_copy_delegation_stateid(inode, fmode, &arg->stateid, &delegation_cred)) {
ee3ae84e 2765 /* Use that stateid */
0418dae1 2766 } else if (truncate && state != NULL) {
2a369153
TM		 2767 struct nfs_lockowner lockowner = {
2768 .l_owner = current->files,
2769 .l_pid = current->tgid,
2770 };
0418dae1
TM		 2771 if (!nfs4_valid_open_stateid(state))
2772 return -EBADF;
abf4e13c 2773 if (nfs4_select_rw_stateid(state, FMODE_WRITE, &lockowner,
8487c479 2774 &arg->stateid, &delegation_cred) == -EIO)
0418dae1 2775 return -EBADF;
08e9eac4 2776 } else
8487c479 2777 nfs4_stateid_copy(&arg->stateid, &zero_stateid);
abf4e13c
TM		 2778 if (delegation_cred)
2779 msg.rpc_cred = delegation_cred;
1da177e4 2780
8487c479 2781 status = nfs4_call_sync(server->client, server, &msg, &arg->seq_args, &res->seq_res, 1);
abf4e13c
TM		 2782
2783 put_rpccred(delegation_cred);
26e976a8
TM		 2784 if (status == 0 && state != NULL)
2785 renew_lease(server, timestamp);
8487c479 2786 trace_nfs4_setattr(inode, &arg->stateid, status);
65e4308d 2787 return status;
1da177e4
LT		 2788}
2789
659bfcd6
TM		 2790static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2791 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2792 struct nfs4_state *state, struct nfs4_label *ilabel,
2793 struct nfs4_label *olabel)
1da177e4 2794{
3e4f6290 2795 struct nfs_server *server = NFS_SERVER(inode);
8487c479
TM		 2796 struct nfs_setattrargs arg = {
2797 .fh = NFS_FH(inode),
2798 .iap = sattr,
2799 .server = server,
2800 .bitmask = server->attr_bitmask,
2801 .label = ilabel,
2802 };
2803 struct nfs_setattrres res = {
2804 .fattr = fattr,
2805 .label = olabel,
2806 .server = server,
2807 };
a1d0b5ee
TM		 2808 struct nfs4_exception exception = {
2809 .state = state,
3114ea7a 2810 .inode = inode,
8487c479 2811 .stateid = &arg.stateid,
a1d0b5ee 2812 };
1da177e4 2813 int err;
8487c479
TM		 2814
2815 arg.bitmask = nfs4_bitmask(server, ilabel);
2816 if (ilabel)
2817 arg.bitmask = nfs4_bitmask(server, olabel);
2818
1da177e4 2819 do {
8487c479 2820 err = _nfs4_do_setattr(inode, &arg, &res, cred, state);
451146be
TM		 2821 switch (err) {
2822 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2823 if (!(sattr->ia_valid & ATTR_SIZE)) {
2824 pr_warn_once("NFSv4: server %s is incorrectly "
2825 "applying open mode checks to "
2826 "a SETATTR that is not "
2827 "changing file size.\n",
2828 server->nfs_client->cl_hostname);
2829 }
451146be
TM		 2830 if (state && !(state->state & FMODE_WRITE)) {
2831 err = -EBADF;
2832 if (sattr->ia_valid & ATTR_OPEN)
2833 err = -EACCES;
2834 goto out;
2835 }
2836 }
2837 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2838 } while (exception.retry);
451146be 2839out:
1da177e4
LT		 2840 return err;
2841}
2842
500d701f
PT		 2843static bool
2844nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
2845{
2846 if (inode == NULL || !nfs_have_layout(inode))
2847 return false;
2848
2849 return pnfs_wait_on_layoutreturn(inode, task);
2850}
2851
1da177e4
LT		 2852struct nfs4_closedata {
2853 struct inode *inode;
2854 struct nfs4_state *state;
2855 struct nfs_closeargs arg;
2856 struct nfs_closeres res;
516a6af6 2857 struct nfs_fattr fattr;
26e976a8 2858 unsigned long timestamp;
f7e8917a
FI		 2859 bool roc;
2860 u32 roc_barrier;
1da177e4
LT		 2861};
2862
963d8fe5 2863static void nfs4_free_closedata(void *data)
9512135d 2864{
963d8fe5
TM		 2865 struct nfs4_closedata *calldata = data;
2866 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2867 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2868
f7e8917a
FI		 2869 if (calldata->roc)
2870 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2871 nfs4_put_open_state(calldata->state);
2872 nfs_free_seqid(calldata->arg.seqid);
9512135d 2873 nfs4_put_state_owner(sp);
322b2b90 2874 nfs_sb_deactive(sb);
9512135d
TM		 2875 kfree(calldata);
2876}
2877
963d8fe5 2878static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2879{
963d8fe5 2880 struct nfs4_closedata *calldata = data;
1da177e4 2881 struct nfs4_state *state = calldata->state;
1da177e4 2882 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2883 nfs4_stateid *res_stateid = NULL;
1da177e4 2884
a3ca5651 2885 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2886 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2887 return;
42113a75 2888 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2889 /* hmm. we are done with the inode, and in the process of freeing
2890 * the state_owner. we keep this around to process errors
2891 */
1da177e4
LT		 2892 switch (task->tk_status) {
2893 case 0:
412f6c4c 2894 res_stateid = &calldata->res.stateid;
3c13cb5b 2895 if (calldata->roc)
f7e8917a
FI		 2896 pnfs_roc_set_barrier(state->inode,
2897 calldata->roc_barrier);
26e976a8 2898 renew_lease(server, calldata->timestamp);
412f6c4c 2899 break;
69794ad7 2900 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2901 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2902 case -NFS4ERR_OLD_STATEID:
2903 case -NFS4ERR_BAD_STATEID:
1da177e4 2904 case -NFS4ERR_EXPIRED:
566fcec6 2905 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 2906 &state->open_stateid)) {
566fcec6
TM		 2907 rpc_restart_call_prepare(task);
2908 goto out_release;
2909 }
dc0b027d 2910 if (calldata->arg.fmode == 0)
9e33bed5 2911 break;
1da177e4 2912 default:
8478eaa1 2913 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 2914 rpc_restart_call_prepare(task);
69794ad7
TM		 2915 goto out_release;
2916 }
1da177e4 2917 }
4a1e2feb
TM		 2918 nfs_clear_open_stateid(state, &calldata->arg.stateid,
2919 res_stateid, calldata->arg.fmode);
69794ad7 2920out_release:
72211dbe 2921 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2922 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2923 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2924}
2925
4ce70ada 2926static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2927{
4ce70ada 2928 struct nfs4_closedata *calldata = data;
9512135d 2929 struct nfs4_state *state = calldata->state;
7fdab069 2930 struct inode *inode = calldata->inode;
aee7af35 2931 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2932 int call_close = 0;
9512135d 2933
a3ca5651 2934 dprintk("%s: begin!\n", __func__);
963d8fe5 2935 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2936 goto out_wait;
003707c7 2937
88069f77 2938 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2939 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2940 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2941 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2942 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 2943 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 2944 /* Calculate the change in open mode */
cd9288ff 2945 calldata->arg.fmode = 0;
e7616923 2946 if (state->n_rdwr == 0) {
cd9288ff
TM		 2947 if (state->n_rdonly == 0)
2948 call_close |= is_rdonly;
2949 else if (is_rdonly)
2950 calldata->arg.fmode |= FMODE_READ;
2951 if (state->n_wronly == 0)
2952 call_close |= is_wronly;
2953 else if (is_wronly)
2954 calldata->arg.fmode |= FMODE_WRITE;
e547f262
TM		 2955 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
2956 call_close |= is_rdwr;
cd9288ff
TM		 2957 } else if (is_rdwr)
2958 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2959
5d422301
TM		 2960 if (!nfs4_valid_open_stateid(state))
2961 call_close = 0;
4cecb76f 2962 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2963
2964 if (!call_close) {
963d8fe5 2965 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2966 goto out_no_action;
9512135d 2967 }
88069f77 2968
500d701f
PT		 2969 if (nfs4_wait_on_layoutreturn(inode, task)) {
2970 nfs_release_seqid(calldata->arg.seqid);
2971 goto out_wait;
2972 }
2973
3c13cb5b 2974 if (calldata->arg.fmode == 0)
88069f77 2975 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3c13cb5b
TM		 2976 if (calldata->roc)
2977 pnfs_roc_get_barrier(inode, &calldata->roc_barrier);
2978
6ae37339
TM		 2979 calldata->arg.share_access =
2980 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2981 calldata->arg.fmode, 0);
88069f77 2982
516a6af6 2983 nfs_fattr_init(calldata->res.fattr);
26e976a8 2984 calldata->timestamp = jiffies;
7fdab069 2985 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2986 &calldata->arg.seq_args,
2987 &calldata->res.seq_res,
2240a9e2
TM		 2988 task) != 0)
2989 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2990 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2991 return;
2992out_no_action:
2993 task->tk_action = NULL;
2994out_wait:
2995 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2996}
2997
963d8fe5 2998static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2999 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 3000 .rpc_call_done = nfs4_close_done,
3001 .rpc_release = nfs4_free_closedata,
3002};
3003
fe08c546
PT		 3004static bool nfs4_roc(struct inode *inode)
3005{
40dd4b7a 3006 if (!nfs_have_layout(inode))
fe08c546 3007 return false;
fe08c546
PT		 3008 return pnfs_roc(inode);
3009}
3010
1da177e4
LT		 3011/*
3012 * It is possible for data to be read/written from a mem-mapped file
3013 * after the sys_close call (which hits the vfs layer as a flush).
3014 * This means that we can't safely call nfsv4 close on a file until
3015 * the inode is cleared. This in turn means that we are not good
3016 * NFSv4 citizens - we do not indicate to the server to update the file's
3017 * share state even when we are done with one of the three share
3018 * stateid's in the inode.
3019 *
3020 * NOTE: Caller must be holding the sp->so_owner semaphore!
3021 */
1f7977c1 3022int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 3023{
4a35bd41 3024 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 3025 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 3026 struct nfs4_closedata *calldata;
b39e625b
TM		 3027 struct nfs4_state_owner *sp = state->owner;
3028 struct rpc_task *task;
5138fde0
TM		 3029 struct rpc_message msg = {
3030 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
3031 .rpc_cred = state->owner->so_cred,
3032 };
c970aa85
TM		 3033 struct rpc_task_setup task_setup_data = {
3034 .rpc_client = server->client,
5138fde0 3035 .rpc_message = &msg,
c970aa85 3036 .callback_ops = &nfs4_close_ops,
101070ca 3037 .workqueue = nfsiod_workqueue,
c970aa85
TM		 3038 .flags = RPC_TASK_ASYNC,
3039 };
9512135d 3040 int status = -ENOMEM;
1da177e4 3041
fa940720
WAA		 3042 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
3043 &task_setup_data.rpc_client, &msg);
3044
8535b2be 3045 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 3046 if (calldata == NULL)
9512135d 3047 goto out;
a9c92d6b 3048 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 3049 calldata->inode = state->inode;
1da177e4 3050 calldata->state = state;
4a35bd41 3051 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 3052 /* Serialization for the sequence id */
63f5f796
TM		 3053 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
3054 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 3055 if (IS_ERR(calldata->arg.seqid))
9512135d 3056 goto out_free_calldata;
dc0b027d 3057 calldata->arg.fmode = 0;
a65318bf 3058 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 3059 calldata->res.fattr = &calldata->fattr;
c1d51931 3060 calldata->res.seqid = calldata->arg.seqid;
516a6af6 3061 calldata->res.server = server;
fe08c546 3062 calldata->roc = nfs4_roc(state->inode);
643168c2 3063 nfs_sb_active(calldata->inode->i_sb);
9512135d 3064
1174dd1f
TM		 3065 msg.rpc_argp = &calldata->arg;
3066 msg.rpc_resp = &calldata->res;
c970aa85
TM		 3067 task_setup_data.callback_data = calldata;
3068 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 3069 if (IS_ERR(task))
3070 return PTR_ERR(task);
a49c3c77
TM		 3071 status = 0;
3072 if (wait)
3073 status = rpc_wait_for_completion_task(task);
b39e625b 3074 rpc_put_task(task);
a49c3c77 3075 return status;
9512135d
TM		 3076out_free_calldata:
3077 kfree(calldata);
3078out:
b39e625b
TM		 3079 nfs4_put_open_state(state);
3080 nfs4_put_state_owner(sp);
9512135d 3081 return status;
1da177e4
LT		 3082}
3083
2b484297 3084static struct inode *
5bc2afc2
TM		 3085nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3086 int open_flags, struct iattr *attr, int *opened)
1da177e4 3087{
1da177e4 3088 struct nfs4_state *state;
aa9c2669
DQ		 3089 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3090
3091 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 3092
565277f6 3093 /* Protect against concurrent sillydeletes */
5bc2afc2 3094 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 3095
3096 nfs4_label_release_security(label);
3097
f46e0bd3
TM		 3098 if (IS_ERR(state))
3099 return ERR_CAST(state);
275bb307 3100 return state->inode;
1da177e4
LT		 3101}
3102
1185a552 3103static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 3104{
3105 if (ctx->state == NULL)
3106 return;
3107 if (is_sync)
643168c2 3108 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 3109 else
643168c2 3110 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 3111}
1da177e4 3112
b944dba3
TM		 3113#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3114#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 3115#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 3116
1da177e4
LT		 3117static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3118{
8c61282f 3119 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 3120 struct nfs4_server_caps_arg args = {
3121 .fhandle = fhandle,
8c61282f 3122 .bitmask = bitmask,
43652ad5 3123 };
1da177e4
LT		 3124 struct nfs4_server_caps_res res = {};
3125 struct rpc_message msg = {
3126 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 3127 .rpc_argp = &args,
1da177e4
LT		 3128 .rpc_resp = &res,
3129 };
3130 int status;
3131
8c61282f
KM		 3132 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3133 FATTR4_WORD0_FH_EXPIRE_TYPE |
3134 FATTR4_WORD0_LINK_SUPPORT |
3135 FATTR4_WORD0_SYMLINK_SUPPORT |
3136 FATTR4_WORD0_ACLSUPPORT;
3137 if (minorversion)
3138 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3139
7c513058 3140 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3141 if (status == 0) {
b944dba3 3142 /* Sanity check the server answers */
8c61282f 3143 switch (minorversion) {
b944dba3
TM		 3144 case 0:
3145 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3146 res.attr_bitmask[2] = 0;
3147 break;
3148 case 1:
3149 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3150 break;
3151 case 2:
3152 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3153 }
1da177e4 3154 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 3155 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3156 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3157 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3158 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 3159 NFS_CAP_CTIME|NFS_CAP_MTIME|
3160 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 3161 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3162 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 3163 server->caps |= NFS_CAP_ACLS;
3164 if (res.has_links != 0)
3165 server->caps |= NFS_CAP_HARDLINKS;
3166 if (res.has_symlinks != 0)
3167 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 3168 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3169 server->caps |= NFS_CAP_FILEID;
3170 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3171 server->caps |= NFS_CAP_MODE;
3172 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3173 server->caps |= NFS_CAP_NLINK;
3174 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3175 server->caps |= NFS_CAP_OWNER;
3176 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3177 server->caps |= NFS_CAP_OWNER_GROUP;
3178 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3179 server->caps |= NFS_CAP_ATIME;
3180 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3181 server->caps |= NFS_CAP_CTIME;
3182 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3183 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 3184#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3185 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3186 server->caps |= NFS_CAP_SECURITY_LABEL;
3187#endif
3188 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3189 sizeof(server->attr_bitmask));
b944dba3 3190 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 3191
a65318bf
TM		 3192 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3193 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3194 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 3195 server->cache_consistency_bitmask[2] = 0;
8c61282f
KM		 3196 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3197 sizeof(server->exclcreat_bitmask));
1da177e4 3198 server->acl_bitmask = res.acl_bitmask;
264e6351 3199 server->fh_expire_type = res.fh_expire_type;
1da177e4 3200 }
cccef3b9 3201
1da177e4
LT		 3202 return status;
3203}
3204
55a97593 3205int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 3206{
3207 struct nfs4_exception exception = { };
3208 int err;
3209 do {
3210 err = nfs4_handle_exception(server,
3211 _nfs4_server_capabilities(server, fhandle),
3212 &exception);
3213 } while (exception.retry);
3214 return err;
3215}
3216
3217static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3218 struct nfs_fsinfo *info)
3219{
aa9c2669 3220 u32 bitmask[3];
1da177e4 3221 struct nfs4_lookup_root_arg args = {
aa9c2669 3222 .bitmask = bitmask,
1da177e4
LT		 3223 };
3224 struct nfs4_lookup_res res = {
3225 .server = server,
0e574af1 3226 .fattr = info->fattr,
1da177e4
LT		 3227 .fh = fhandle,
3228 };
3229 struct rpc_message msg = {
3230 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3231 .rpc_argp = &args,
3232 .rpc_resp = &res,
3233 };
008f55d0 3234
aa9c2669
DQ		 3235 bitmask[0] = nfs4_fattr_bitmap[0];
3236 bitmask[1] = nfs4_fattr_bitmap[1];
3237 /*
3238 * Process the label in the upcoming getfattr
3239 */
3240 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3241
0e574af1 3242 nfs_fattr_init(info->fattr);
7c513058 3243 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3244}
3245
3246static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3247 struct nfs_fsinfo *info)
3248{
3249 struct nfs4_exception exception = { };
3250 int err;
3251 do {
fb8a5ba8 3252 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3253 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3254 switch (err) {
3255 case 0:
3256 case -NFS4ERR_WRONGSEC:
05e9cfb4 3257 goto out;
fb8a5ba8
BS		 3258 default:
3259 err = nfs4_handle_exception(server, err, &exception);
3260 }
1da177e4 3261 } while (exception.retry);
05e9cfb4 3262out:
1da177e4
LT		 3263 return err;
3264}
3265
8f70e95f
BS		 3266static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3267 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3268{
c2190661
TM		 3269 struct rpc_auth_create_args auth_args = {
3270 .pseudoflavor = flavor,
3271 };
8f70e95f
BS		 3272 struct rpc_auth *auth;
3273 int ret;
3274
c2190661 3275 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3276 if (IS_ERR(auth)) {
75bc8821 3277 ret = -EACCES;
8f70e95f
BS		 3278 goto out;
3279 }
3280 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3281out:
3282 return ret;
3283}
3284
9a744ba3
CL		 3285/*
3286 * Retry pseudoroot lookup with various security flavors. We do this when:
3287 *
3288 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3289 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3290 *
3291 * Returns zero on success, or a negative NFS4ERR value, or a
3292 * negative errno value.
3293 */
801a16dc 3294static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3295 struct nfs_fsinfo *info)
1da177e4 3296{
9a744ba3
CL		 3297 /* Per 3530bis 15.33.5 */
3298 static const rpc_authflavor_t flav_array[] = {
3299 RPC_AUTH_GSS_KRB5P,
3300 RPC_AUTH_GSS_KRB5I,
3301 RPC_AUTH_GSS_KRB5,
c4eafe11 3302 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3303 RPC_AUTH_NULL,
3304 };
3305 int status = -EPERM;
3306 size_t i;
6a1a1e34 3307
4d4b69dd
WAA		 3308 if (server->auth_info.flavor_len > 0) {
3309 /* try each flavor specified by user */
3310 for (i = 0; i < server->auth_info.flavor_len; i++) {
3311 status = nfs4_lookup_root_sec(server, fhandle, info,
3312 server->auth_info.flavors[i]);
3313 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3314 continue;
3315 break;
3316 }
3317 } else {
3318 /* no flavors specified by user, try default list */
3319 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3320 status = nfs4_lookup_root_sec(server, fhandle, info,
3321 flav_array[i]);
3322 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3323 continue;
3324 break;
3325 }
8f70e95f 3326 }
9a744ba3 3327
fb8a5ba8
BS		 3328 /*
3329 * -EACCESS could mean that the user doesn't have correct permissions
3330 * to access the mount. It could also mean that we tried to mount
3331 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3332 * existing mount programs don't handle -EACCES very well so it should
3333 * be mapped to -EPERM instead.
3334 */
3335 if (status == -EACCES)
3336 status = -EPERM;
801a16dc
BS		 3337 return status;
3338}
3339
2ed4b95b
CL		 3340/**
3341 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3342 * @server: initialized nfs_server handle
3343 * @fhandle: we fill in the pseudo-fs root file handle
3344 * @info: we fill in an FSINFO struct
5e6b1990 3345 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3346 *
3347 * Returns zero on success, or a negative errno.
801a16dc 3348 */
3028eb2b 3349int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3350 struct nfs_fsinfo *info,
3351 bool auth_probe)
801a16dc 3352{
c7757074 3353 int status = 0;
2ed4b95b 3354
c7757074 3355 if (!auth_probe)
5e6b1990 3356 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3357
3358 if (auth_probe || status == NFS4ERR_WRONGSEC)
698c937b
TM		 3359 status = server->nfs_client->cl_mvops->find_root_sec(server,
3360 fhandle, info);
2ed4b95b 3361
1da177e4
LT		 3362 if (status == 0)
3363 status = nfs4_server_capabilities(server, fhandle);
3364 if (status == 0)
3365 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3366
c12e87f4 3367 return nfs4_map_errors(status);
1da177e4
LT		 3368}
3369
bae36241
BS		 3370static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3371 struct nfs_fsinfo *info)
3372{
3373 int error;
3374 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3375 struct nfs4_label *label = NULL;
bae36241
BS		 3376
3377 error = nfs4_server_capabilities(server, mntfh);
3378 if (error < 0) {
3379 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3380 return error;
3381 }
3382
14c43f76
DQ		 3383 label = nfs4_label_alloc(server, GFP_KERNEL);
3384 if (IS_ERR(label))
3385 return PTR_ERR(label);
3386
1775fd3e 3387 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3388 if (error < 0) {
3389 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3390 goto err_free_label;
bae36241
BS		 3391 }
3392
3393 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3394 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3395 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3396
14c43f76
DQ		 3397err_free_label:
3398 nfs4_label_free(label);
3399
bae36241
BS		 3400 return error;
3401}
3402
6b97fd3d
MN		 3403/*
3404 * Get locations and (maybe) other attributes of a referral.
3405 * Note that we'll actually follow the referral later when
3406 * we detect fsid mismatch in inode revalidation
3407 */
f05d147f
BS		 3408static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3409 const struct qstr *name, struct nfs_fattr *fattr,
3410 struct nfs_fh *fhandle)
6b97fd3d
MN		 3411{
3412 int status = -ENOMEM;
3413 struct page *page = NULL;
3414 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3415
3416 page = alloc_page(GFP_KERNEL);
3417 if (page == NULL)
3418 goto out;
3419 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3420 if (locations == NULL)
3421 goto out;
3422
f05d147f 3423 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3424 if (status != 0)
3425 goto out;
519ae255
CL		 3426
3427 /*
3428 * If the fsid didn't change, this is a migration event, not a
3429 * referral. Cause us to drop into the exception handler, which
3430 * will kick off migration recovery.
3431 */
6b97fd3d 3432 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3433 dprintk("%s: server did not return a different fsid for"
3434 " a referral at %s\n", __func__, name->name);
519ae255 3435 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3436 goto out;
3437 }
533eb461
AA		 3438 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3439 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3440
533eb461 3441 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3442 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3443 memset(fhandle, 0, sizeof(struct nfs_fh));
3444out:
3445 if (page)
3446 __free_page(page);
5d7ca35a 3447 kfree(locations);
6b97fd3d
MN		 3448 return status;
3449}
3450
1775fd3e
DQ		 3451static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3452 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3453{
3454 struct nfs4_getattr_arg args = {
3455 .fh = fhandle,
3456 .bitmask = server->attr_bitmask,
3457 };
3458 struct nfs4_getattr_res res = {
3459 .fattr = fattr,
1775fd3e 3460 .label = label,
1da177e4
LT		 3461 .server = server,
3462 };
3463 struct rpc_message msg = {
3464 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3465 .rpc_argp = &args,
3466 .rpc_resp = &res,
3467 };
aa9c2669
DQ		 3468
3469 args.bitmask = nfs4_bitmask(server, label);
3470
0e574af1 3471 nfs_fattr_init(fattr);
7c513058 3472 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3473}
3474
1775fd3e
DQ		 3475static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3476 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3477{
3478 struct nfs4_exception exception = { };
3479 int err;
3480 do {
b5f875a9
TM		 3481 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3482 trace_nfs4_getattr(server, fhandle, fattr, err);
3483 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3484 &exception);
3485 } while (exception.retry);
3486 return err;
3487}
3488
3489/*
3490 * The file is not closed if it is opened due to the a request to change
3491 * the size of the file. The open call will not be needed once the
3492 * VFS layer lookup-intents are implemented.
3493 *
3494 * Close is called when the inode is destroyed.
3495 * If we haven't opened the file for O_WRONLY, we
3496 * need to in the size_change case to obtain a stateid.
3497 *
3498 * Got race?
3499 * Because OPEN is always done by name in nfsv4, it is
3500 * possible that we opened a different file by the same
3501 * name. We can recognize this race condition, but we
3502 * can't do anything about it besides returning an error.
3503 *
3504 * This will be fixed with VFS changes (lookup-intent).
3505 */
3506static int
3507nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3508 struct iattr *sattr)
3509{
2b0143b5 3510 struct inode *inode = d_inode(dentry);
659bfcd6 3511 struct rpc_cred *cred = NULL;
d530838b 3512 struct nfs4_state *state = NULL;
14c43f76 3513 struct nfs4_label *label = NULL;
1da177e4
LT		 3514 int status;
3515
88ac815c
PT		 3516 if (pnfs_ld_layoutret_on_setattr(inode) &&
3517 sattr->ia_valid & ATTR_SIZE &&
3518 sattr->ia_size < i_size_read(inode))
24028672 3519 pnfs_commit_and_return_layout(inode);
8a1636c4 3520
0e574af1 3521 nfs_fattr_init(fattr);
1da177e4 3522
2669940d
AA		 3523 /* Deal with open(O_TRUNC) */
3524 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3525 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3526
3527 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3528 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3529 return 0;
3530
d530838b 3531 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3532 if (sattr->ia_valid & ATTR_FILE) {
3533 struct nfs_open_context *ctx;
3534
3535 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3536 if (ctx) {
3537 cred = ctx->cred;
3538 state = ctx->state;
3539 }
659bfcd6 3540 }
08e9eac4 3541
14c43f76
DQ		 3542 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3543 if (IS_ERR(label))
3544 return PTR_ERR(label);
3545
3546 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3547 if (status == 0) {
f044636d 3548 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3549 nfs_setsecurity(inode, fattr, label);
3550 }
14c43f76 3551 nfs4_label_free(label);
1da177e4
LT		 3552 return status;
3553}
3554
0c2e53f1
TM		 3555static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3556 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3557 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3558{
0c2e53f1 3559 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3560 int status;
3561 struct nfs4_lookup_arg args = {
3562 .bitmask = server->attr_bitmask,
0c2e53f1 3563 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3564 .name = name,
3565 };
3566 struct nfs4_lookup_res res = {
3567 .server = server,
3568 .fattr = fattr,
aa9c2669 3569 .label = label,
2b3de441
DH		 3570 .fh = fhandle,
3571 };
3572 struct rpc_message msg = {
3573 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3574 .rpc_argp = &args,
3575 .rpc_resp = &res,
3576 };
3577
aa9c2669
DQ		 3578 args.bitmask = nfs4_bitmask(server, label);
3579
2b3de441
DH		 3580 nfs_fattr_init(fattr);
3581
1da177e4 3582 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3583 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3584 dprintk("NFS reply lookup: %d\n", status);
3585 return status;
3586}
3587
72de53ec 3588static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3589{
7ebb9315 3590 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3591 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3592 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3593 fattr->nlink = 2;
3594}
3595
72de53ec 3596static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
beffb8fe 3597 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3598 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3599{
3600 struct nfs4_exception exception = { };
72de53ec 3601 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3602 int err;
3603 do {
1775fd3e 3604 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3605 trace_nfs4_lookup(dir, name, err);
72de53ec 3606 switch (err) {
08ef7bd3 3607 case -NFS4ERR_BADNAME:
72de53ec
BS		 3608 err = -ENOENT;
3609 goto out;
0c2e53f1 3610 case -NFS4ERR_MOVED:
f05d147f 3611 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3612 if (err == -NFS4ERR_MOVED)
3613 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3614 goto out;
0c2e53f1 3615 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3616 err = -EPERM;
3617 if (client != *clnt)
3618 goto out;
66b06860 3619 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3620 if (IS_ERR(client))
3621 return PTR_ERR(client);
3622
3623 exception.retry = 1;
3624 break;
3625 default:
3626 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3627 }
1da177e4 3628 } while (exception.retry);
72de53ec
BS		 3629
3630out:
3631 if (err == 0)
3632 *clnt = client;
3633 else if (client != *clnt)
3634 rpc_shutdown_client(client);
3635
1da177e4
LT		 3636 return err;
3637}
3638
beffb8fe 3639static int nfs4_proc_lookup(struct inode *dir, const struct qstr *name,
1775fd3e
DQ		 3640 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3641 struct nfs4_label *label)
72de53ec
BS		 3642{
3643 int status;
3644 struct rpc_clnt *client = NFS_CLIENT(dir);
3645
1775fd3e 3646 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3647 if (client != NFS_CLIENT(dir)) {
3648 rpc_shutdown_client(client);
3649 nfs_fixup_secinfo_attributes(fattr);
3650 }
3651 return status;
3652}
3653
f05d147f 3654struct rpc_clnt *
beffb8fe 3655nfs4_proc_lookup_mountpoint(struct inode *dir, const struct qstr *name,
f05d147f
BS		 3656 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3657{
b72888cb 3658 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3659 int status;
f05d147f 3660
1775fd3e 3661 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3662 if (status < 0)
f05d147f 3663 return ERR_PTR(status);
b72888cb 3664 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3665}
3666
1da177e4
LT		 3667static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3668{
76b32999 3669 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3670 struct nfs4_accessargs args = {
3671 .fh = NFS_FH(inode),
a4980e78 3672 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3673 };
3674 struct nfs4_accessres res = {
3675 .server = server,
1da177e4 3676 };
1da177e4
LT		 3677 struct rpc_message msg = {
3678 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3679 .rpc_argp = &args,
3680 .rpc_resp = &res,
3681 .rpc_cred = entry->cred,
3682 };
3683 int mode = entry->mask;
aa9c2669 3684 int status = 0;
1da177e4
LT		 3685
3686 /*
3687 * Determine which access bits we want to ask for...
3688 */
3689 if (mode & MAY_READ)
3690 args.access |= NFS4_ACCESS_READ;
3691 if (S_ISDIR(inode->i_mode)) {
3692 if (mode & MAY_WRITE)
3693 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3694 if (mode & MAY_EXEC)
3695 args.access |= NFS4_ACCESS_LOOKUP;
3696 } else {
3697 if (mode & MAY_WRITE)
3698 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3699 if (mode & MAY_EXEC)
3700 args.access |= NFS4_ACCESS_EXECUTE;
3701 }
c407d41a
TM		 3702
3703 res.fattr = nfs_alloc_fattr();
3704 if (res.fattr == NULL)
3705 return -ENOMEM;
3706
7c513058 3707 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3708 if (!status) {
6168f62c 3709 nfs_access_set_mask(entry, res.access);
c407d41a 3710 nfs_refresh_inode(inode, res.fattr);
1da177e4 3711 }
c407d41a 3712 nfs_free_fattr(res.fattr);
1da177e4
LT		 3713 return status;
3714}
3715
3716static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3717{
3718 struct nfs4_exception exception = { };
3719 int err;
3720 do {
c1578b76
TM		 3721 err = _nfs4_proc_access(inode, entry);
3722 trace_nfs4_access(inode, err);
3723 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3724 &exception);
3725 } while (exception.retry);
3726 return err;
3727}
3728
3729/*
3730 * TODO: For the time being, we don't try to get any attributes
3731 * along with any of the zero-copy operations READ, READDIR,
3732 * READLINK, WRITE.
3733 *
3734 * In the case of the first three, we want to put the GETATTR
3735 * after the read-type operation -- this is because it is hard
3736 * to predict the length of a GETATTR response in v4, and thus
3737 * align the READ data correctly. This means that the GETATTR
3738 * may end up partially falling into the page cache, and we should
3739 * shift it into the 'tail' of the xdr_buf before processing.
3740 * To do this efficiently, we need to know the total length
3741 * of data received, which doesn't seem to be available outside
3742 * of the RPC layer.
3743 *
3744 * In the case of WRITE, we also want to put the GETATTR after
3745 * the operation -- in this case because we want to make sure
140150db 3746 * we get the post-operation mtime and size.
1da177e4
LT		 3747 *
3748 * Both of these changes to the XDR layer would in fact be quite
3749 * minor, but I decided to leave them for a subsequent patch.
3750 */
3751static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3752 unsigned int pgbase, unsigned int pglen)
3753{
3754 struct nfs4_readlink args = {
3755 .fh = NFS_FH(inode),
3756 .pgbase = pgbase,
3757 .pglen = pglen,
3758 .pages = &page,
3759 };
f50c7000 3760 struct nfs4_readlink_res res;
1da177e4
LT		 3761 struct rpc_message msg = {
3762 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3763 .rpc_argp = &args,
f50c7000 3764 .rpc_resp = &res,
1da177e4
LT		 3765 };
3766
7c513058 3767 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3768}
3769
3770static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3771 unsigned int pgbase, unsigned int pglen)
3772{
3773 struct nfs4_exception exception = { };
3774 int err;
3775 do {
c1578b76
TM		 3776 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3777 trace_nfs4_readlink(inode, err);
3778 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3779 &exception);
3780 } while (exception.retry);
3781 return err;
3782}
3783
1da177e4 3784/*
8867fe58 3785 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3786 */
1da177e4
LT		 3787static int
3788nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3789 int flags)
1da177e4 3790{
aa9c2669 3791 struct nfs4_label l, *ilabel = NULL;
8867fe58 3792 struct nfs_open_context *ctx;
1da177e4 3793 struct nfs4_state *state;
1da177e4
LT		 3794 int status = 0;
3795
8867fe58
MS		 3796 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3797 if (IS_ERR(ctx))
3798 return PTR_ERR(ctx);
3799
aa9c2669
DQ		 3800 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3801
a8a5da99 3802 sattr->ia_mode &= ~current_umask();
c5c3fb5f 3803 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 3804 if (IS_ERR(state)) {
3805 status = PTR_ERR(state);
c0204fd2 3806 goto out;
1da177e4 3807 }
1da177e4 3808out:
aa9c2669 3809 nfs4_label_release_security(ilabel);
8867fe58 3810 put_nfs_open_context(ctx);
1da177e4
LT		 3811 return status;
3812}
3813
beffb8fe 3814static int _nfs4_proc_remove(struct inode *dir, const struct qstr *name)
1da177e4 3815{
16e42959 3816 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3817 struct nfs_removeargs args = {
1da177e4 3818 .fh = NFS_FH(dir),
26fe5750 3819 .name = *name,
16e42959 3820 };
4fdc17b2 3821 struct nfs_removeres res = {
16e42959 3822 .server = server,
1da177e4 3823 };
1da177e4 3824 struct rpc_message msg = {
4fdc17b2
TM		 3825 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3826 .rpc_argp = &args,
3827 .rpc_resp = &res,
1da177e4 3828 };
778d2817 3829 int status;
1da177e4 3830
7c513058 3831 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3832 if (status == 0)
16e42959 3833 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3834 return status;
3835}
3836
beffb8fe 3837static int nfs4_proc_remove(struct inode *dir, const struct qstr *name)
1da177e4
LT		 3838{
3839 struct nfs4_exception exception = { };
3840 int err;
3841 do {
078ea3df
TM		 3842 err = _nfs4_proc_remove(dir, name);
3843 trace_nfs4_remove(dir, name, err);
3844 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3845 &exception);
3846 } while (exception.retry);
3847 return err;
3848}
3849
e4eff1a6 3850static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3851{
e4eff1a6
TM		 3852 struct nfs_server *server = NFS_SERVER(dir);
3853 struct nfs_removeargs *args = msg->rpc_argp;
3854 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3855
e4eff1a6 3856 res->server = server;
1da177e4 3857 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3858 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3859
3860 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3861}
3862
34e137cc
BS		 3863static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3864{
884be175 3865 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb),
d9afbd1b
TM		 3866 &data->args.seq_args,
3867 &data->res.seq_res,
3868 task);
1da177e4
LT		 3869}
3870
e4eff1a6 3871static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3872{
078ea3df
TM		 3873 struct nfs_unlinkdata *data = task->tk_calldata;
3874 struct nfs_removeres *res = &data->res;
e4eff1a6 3875
14516c3a
TM		 3876 if (!nfs4_sequence_done(task, &res->seq_res))
3877 return 0;
8478eaa1
N		 3878 if (nfs4_async_handle_error(task, res->server, NULL,
3879 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3880 return 0;
3881 update_changeattr(dir, &res->cinfo);
e4eff1a6 3882 return 1;
1da177e4
LT		 3883}
3884
d3d4152a
JL		 3885static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3886{
3887 struct nfs_server *server = NFS_SERVER(dir);
3888 struct nfs_renameargs *arg = msg->rpc_argp;
3889 struct nfs_renameres *res = msg->rpc_resp;
3890
3891 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3892 res->server = server;
a9c92d6b 3893 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3894}
3895
c6bfa1a1
BS		 3896static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3897{
d9afbd1b
TM		 3898 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3899 &data->args.seq_args,
3900 &data->res.seq_res,
3901 task);
d3d4152a
JL		 3902}
3903
3904static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3905 struct inode *new_dir)
3906{
fbc6f7c2
TM		 3907 struct nfs_renamedata *data = task->tk_calldata;
3908 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3909
3910 if (!nfs4_sequence_done(task, &res->seq_res))
3911 return 0;
8478eaa1 3912 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3913 return 0;
3914
3915 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3916 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3917 return 1;
3918}
3919
beffb8fe 3920static int _nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4 3921{
91ba2eee 3922 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3923 struct nfs4_link_arg arg = {
3924 .fh = NFS_FH(inode),
3925 .dir_fh = NFS_FH(dir),
3926 .name = name,
91ba2eee
TM		 3927 .bitmask = server->attr_bitmask,
3928 };
91ba2eee
TM		 3929 struct nfs4_link_res res = {
3930 .server = server,
1775fd3e 3931 .label = NULL,
1da177e4 3932 };
1da177e4
LT		 3933 struct rpc_message msg = {
3934 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3935 .rpc_argp = &arg,
91ba2eee 3936 .rpc_resp = &res,
1da177e4 3937 };
136f2627
TM		 3938 int status = -ENOMEM;
3939
3940 res.fattr = nfs_alloc_fattr();
778d2817 3941 if (res.fattr == NULL)
136f2627 3942 goto out;
1da177e4 3943
14c43f76
DQ		 3944 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3945 if (IS_ERR(res.label)) {
3946 status = PTR_ERR(res.label);
3947 goto out;
3948 }
aa9c2669 3949 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3950
7c513058 3951 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3952 if (!status) {
3953 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3954 status = nfs_post_op_update_inode(inode, res.fattr);
3955 if (!status)
3956 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3957 }
14c43f76
DQ		 3958
3959
3960 nfs4_label_free(res.label);
3961
136f2627 3962out:
136f2627 3963 nfs_free_fattr(res.fattr);
1da177e4
LT		 3964 return status;
3965}
3966
beffb8fe 3967static int nfs4_proc_link(struct inode *inode, struct inode *dir, const struct qstr *name)
1da177e4
LT		 3968{
3969 struct nfs4_exception exception = { };
3970 int err;
3971 do {
3972 err = nfs4_handle_exception(NFS_SERVER(inode),
3973 _nfs4_proc_link(inode, dir, name),
3974 &exception);
3975 } while (exception.retry);
3976 return err;
3977}
3978
57dc9a57
TM		 3979struct nfs4_createdata {
3980 struct rpc_message msg;
3981 struct nfs4_create_arg arg;
3982 struct nfs4_create_res res;
3983 struct nfs_fh fh;
3984 struct nfs_fattr fattr;
1775fd3e 3985 struct nfs4_label *label;
57dc9a57
TM		 3986};
3987
3988static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
beffb8fe 3989 const struct qstr *name, struct iattr *sattr, u32 ftype)
57dc9a57
TM		 3990{
3991 struct nfs4_createdata *data;
3992
3993 data = kzalloc(sizeof(*data), GFP_KERNEL);
3994 if (data != NULL) {
3995 struct nfs_server *server = NFS_SERVER(dir);
3996
14c43f76
DQ		 3997 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3998 if (IS_ERR(data->label))
3999 goto out_free;
4000
57dc9a57
TM		 4001 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
4002 data->msg.rpc_argp = &data->arg;
4003 data->msg.rpc_resp = &data->res;
4004 data->arg.dir_fh = NFS_FH(dir);
4005 data->arg.server = server;
4006 data->arg.name = name;
4007 data->arg.attrs = sattr;
4008 data->arg.ftype = ftype;
aa9c2669 4009 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 4010 data->res.server = server;
4011 data->res.fh = &data->fh;
4012 data->res.fattr = &data->fattr;
1775fd3e 4013 data->res.label = data->label;
57dc9a57 4014 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 4015 }
4016 return data;
14c43f76
DQ		 4017out_free:
4018 kfree(data);
4019 return NULL;
57dc9a57
TM		 4020}
4021
4022static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
4023{
7c513058 4024 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 4025 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 4026 if (status == 0) {
4027 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 4028 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 4029 }
4030 return status;
4031}
4032
4033static void nfs4_free_createdata(struct nfs4_createdata *data)
4034{
14c43f76 4035 nfs4_label_free(data->label);
57dc9a57
TM		 4036 kfree(data);
4037}
4038
4f390c15 4039static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 4040 struct page *page, unsigned int len, struct iattr *sattr,
4041 struct nfs4_label *label)
1da177e4 4042{
57dc9a57
TM		 4043 struct nfs4_createdata *data;
4044 int status = -ENAMETOOLONG;
1da177e4 4045
94a6d753 4046 if (len > NFS4_MAXPATHLEN)
57dc9a57 4047 goto out;
4f390c15 4048
57dc9a57
TM		 4049 status = -ENOMEM;
4050 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
4051 if (data == NULL)
4052 goto out;
4053
4054 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
4055 data->arg.u.symlink.pages = &page;
4056 data->arg.u.symlink.len = len;
1775fd3e 4057 data->arg.label = label;
1da177e4 4058
57dc9a57
TM		 4059 status = nfs4_do_create(dir, dentry, data);
4060
4061 nfs4_free_createdata(data);
4062out:
1da177e4
LT		 4063 return status;
4064}
4065
4f390c15 4066static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 4067 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 4068{
4069 struct nfs4_exception exception = { };
aa9c2669 4070 struct nfs4_label l, *label = NULL;
1da177e4 4071 int err;
aa9c2669
DQ		 4072
4073 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4074
1da177e4 4075 do {
078ea3df
TM		 4076 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4077 trace_nfs4_symlink(dir, &dentry->d_name, err);
4078 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4079 &exception);
4080 } while (exception.retry);
aa9c2669
DQ		 4081
4082 nfs4_label_release_security(label);
1da177e4
LT		 4083 return err;
4084}
4085
4086static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 4087 struct iattr *sattr, struct nfs4_label *label)
1da177e4 4088{
57dc9a57
TM		 4089 struct nfs4_createdata *data;
4090 int status = -ENOMEM;
1da177e4 4091
57dc9a57
TM		 4092 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4093 if (data == NULL)
4094 goto out;
4095
1775fd3e 4096 data->arg.label = label;
57dc9a57
TM		 4097 status = nfs4_do_create(dir, dentry, data);
4098
4099 nfs4_free_createdata(data);
4100out:
1da177e4
LT		 4101 return status;
4102}
4103
4104static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4105 struct iattr *sattr)
4106{
4107 struct nfs4_exception exception = { };
aa9c2669 4108 struct nfs4_label l, *label = NULL;
1da177e4 4109 int err;
a8a5da99 4110
aa9c2669
DQ		 4111 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4112
a8a5da99 4113 sattr->ia_mode &= ~current_umask();
1da177e4 4114 do {
078ea3df
TM		 4115 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4116 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4117 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4118 &exception);
4119 } while (exception.retry);
aa9c2669
DQ		 4120 nfs4_label_release_security(label);
4121
1da177e4
LT		 4122 return err;
4123}
4124
4125static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4126 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4 4127{
2b0143b5 4128 struct inode *dir = d_inode(dentry);
1da177e4
LT		 4129 struct nfs4_readdir_arg args = {
4130 .fh = NFS_FH(dir),
56e4ebf8 4131 .pages = pages,
1da177e4
LT		 4132 .pgbase = 0,
4133 .count = count,
2b0143b5 4134 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 4135 .plus = plus,
1da177e4
LT		 4136 };
4137 struct nfs4_readdir_res res;
4138 struct rpc_message msg = {
4139 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4140 .rpc_argp = &args,
4141 .rpc_resp = &res,
4142 .rpc_cred = cred,
4143 };
4144 int status;
4145
6de1472f
AV		 4146 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4147 dentry,
eadf4598 4148 (unsigned long long)cookie);
c3f52af3 4149 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 4150 res.pgbase = args.pgbase;
7c513058 4151 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 4152 if (status >= 0) {
c3f52af3 4153 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 4154 status += args.pgbase;
4155 }
c4812998
TM		 4156
4157 nfs_invalidate_atime(dir);
4158
3110ff80 4159 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 4160 return status;
4161}
4162
4163static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4164 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 4165{
4166 struct nfs4_exception exception = { };
4167 int err;
4168 do {
c1578b76
TM		 4169 err = _nfs4_proc_readdir(dentry, cred, cookie,
4170 pages, count, plus);
2b0143b5
DH		 4171 trace_nfs4_readdir(d_inode(dentry), err);
4172 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 4173 &exception);
4174 } while (exception.retry);
4175 return err;
4176}
4177
4178static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 4179 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 4180{
57dc9a57
TM		 4181 struct nfs4_createdata *data;
4182 int mode = sattr->ia_mode;
4183 int status = -ENOMEM;
1da177e4 4184
57dc9a57
TM		 4185 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4186 if (data == NULL)
4187 goto out;
4188
1da177e4 4189 if (S_ISFIFO(mode))
57dc9a57 4190 data->arg.ftype = NF4FIFO;
1da177e4 4191 else if (S_ISBLK(mode)) {
57dc9a57
TM		 4192 data->arg.ftype = NF4BLK;
4193 data->arg.u.device.specdata1 = MAJOR(rdev);
4194 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 4195 }
4196 else if (S_ISCHR(mode)) {
57dc9a57
TM		 4197 data->arg.ftype = NF4CHR;
4198 data->arg.u.device.specdata1 = MAJOR(rdev);
4199 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 4200 } else if (!S_ISSOCK(mode)) {
4201 status = -EINVAL;
4202 goto out_free;
1da177e4 4203 }
1775fd3e 4204
aa9c2669 4205 data->arg.label = label;
57dc9a57 4206 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 4207out_free:
57dc9a57
TM		 4208 nfs4_free_createdata(data);
4209out:
1da177e4
LT		 4210 return status;
4211}
4212
4213static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4214 struct iattr *sattr, dev_t rdev)
4215{
4216 struct nfs4_exception exception = { };
aa9c2669 4217 struct nfs4_label l, *label = NULL;
1da177e4 4218 int err;
a8a5da99 4219
aa9c2669
DQ		 4220 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4221
a8a5da99 4222 sattr->ia_mode &= ~current_umask();
1da177e4 4223 do {
078ea3df
TM		 4224 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4225 trace_nfs4_mknod(dir, &dentry->d_name, err);
4226 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4227 &exception);
4228 } while (exception.retry);
aa9c2669
DQ		 4229
4230 nfs4_label_release_security(label);
4231
1da177e4
LT		 4232 return err;
4233}
4234
4235static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4236 struct nfs_fsstat *fsstat)
4237{
4238 struct nfs4_statfs_arg args = {
4239 .fh = fhandle,
4240 .bitmask = server->attr_bitmask,
4241 };
24ad148a
BH		 4242 struct nfs4_statfs_res res = {
4243 .fsstat = fsstat,
4244 };
1da177e4
LT		 4245 struct rpc_message msg = {
4246 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4247 .rpc_argp = &args,
24ad148a 4248 .rpc_resp = &res,
1da177e4
LT		 4249 };
4250
0e574af1 4251 nfs_fattr_init(fsstat->fattr);
7c513058 4252 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4253}
4254
4255static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4256{
4257 struct nfs4_exception exception = { };
4258 int err;
4259 do {
4260 err = nfs4_handle_exception(server,
4261 _nfs4_proc_statfs(server, fhandle, fsstat),
4262 &exception);
4263 } while (exception.retry);
4264 return err;
4265}
4266
4267static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4268 struct nfs_fsinfo *fsinfo)
4269{
4270 struct nfs4_fsinfo_arg args = {
4271 .fh = fhandle,
4272 .bitmask = server->attr_bitmask,
4273 };
3dda5e43
BH		 4274 struct nfs4_fsinfo_res res = {
4275 .fsinfo = fsinfo,
4276 };
1da177e4
LT		 4277 struct rpc_message msg = {
4278 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4279 .rpc_argp = &args,
3dda5e43 4280 .rpc_resp = &res,
1da177e4
LT		 4281 };
4282
7c513058 4283 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4284}
4285
4286static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4287{
4288 struct nfs4_exception exception = { };
83ca7f5a 4289 unsigned long now = jiffies;
1da177e4
LT		 4290 int err;
4291
4292 do {
83ca7f5a 4293 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4294 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a 4295 if (err == 0) {
fb10fb67
TM		 4296 nfs4_set_lease_period(server->nfs_client,
4297 fsinfo->lease_time * HZ,
4298 now);
83ca7f5a
CL		 4299 break;
4300 }
4301 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4302 } while (exception.retry);
4303 return err;
4304}
4305
4306static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4307{
e38eb650
BS		 4308 int error;
4309
0e574af1 4310 nfs_fattr_init(fsinfo->fattr);
e38eb650 4311 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4312 if (error == 0) {
4313 /* block layout checks this! */
4314 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4315 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4316 }
e38eb650
BS		 4317
4318 return error;
1da177e4
LT		 4319}
4320
4321static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4322 struct nfs_pathconf *pathconf)
4323{
4324 struct nfs4_pathconf_arg args = {
4325 .fh = fhandle,
4326 .bitmask = server->attr_bitmask,
4327 };
d45b2989
BH		 4328 struct nfs4_pathconf_res res = {
4329 .pathconf = pathconf,
4330 };
1da177e4
LT		 4331 struct rpc_message msg = {
4332 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4333 .rpc_argp = &args,
d45b2989 4334 .rpc_resp = &res,
1da177e4
LT		 4335 };
4336
4337 /* None of the pathconf attributes are mandatory to implement */
4338 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4339 memset(pathconf, 0, sizeof(*pathconf));
4340 return 0;
4341 }
4342
0e574af1 4343 nfs_fattr_init(pathconf->fattr);
7c513058 4344 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4345}
4346
4347static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4348 struct nfs_pathconf *pathconf)
4349{
4350 struct nfs4_exception exception = { };
4351 int err;
4352
4353 do {
4354 err = nfs4_handle_exception(server,
4355 _nfs4_proc_pathconf(server, fhandle, pathconf),
4356 &exception);
4357 } while (exception.retry);
4358 return err;
4359}
4360
5521abfd 4361int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4362 const struct nfs_open_context *ctx,
4363 const struct nfs_lock_context *l_ctx,
4364 fmode_t fmode)
4365{
4366 const struct nfs_lockowner *lockowner = NULL;
4367
4368 if (l_ctx != NULL)
4369 lockowner = &l_ctx->lockowner;
abf4e13c 4370 return nfs4_select_rw_stateid(ctx->state, fmode, lockowner, stateid, NULL);
9b206149
TM		 4371}
4372EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4373
5521abfd
TM		 4374static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4375 const struct nfs_open_context *ctx,
4376 const struct nfs_lock_context *l_ctx,
4377 fmode_t fmode)
4378{
4379 nfs4_stateid current_stateid;
4380
e1253be0
TM		 4381 /* If the current stateid represents a lost lock, then exit */
4382 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4383 return true;
5521abfd
TM		 4384 return nfs4_stateid_match(stateid, &current_stateid);
4385}
4386
4387static bool nfs4_error_stateid_expired(int err)
4388{
4389 switch (err) {
4390 case -NFS4ERR_DELEG_REVOKED:
4391 case -NFS4ERR_ADMIN_REVOKED:
4392 case -NFS4ERR_BAD_STATEID:
4393 case -NFS4ERR_STALE_STATEID:
4394 case -NFS4ERR_OLD_STATEID:
4395 case -NFS4ERR_OPENMODE:
4396 case -NFS4ERR_EXPIRED:
4397 return true;
4398 }
4399 return false;
4400}
4401
d45f60c6 4402void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4403{
d45f60c6 4404 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4405}
4406
d45f60c6 4407static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4408{
d45f60c6 4409 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4410
d45f60c6
WAA		 4411 trace_nfs4_read(hdr, task->tk_status);
4412 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4413 hdr->args.context->state,
4414 NULL) == -EAGAIN) {
d00c5d43 4415 rpc_restart_call_prepare(task);
ec06c096 4416 return -EAGAIN;
1da177e4 4417 }
8850df99 4418
d45f60c6 4419 __nfs4_read_done_cb(hdr);
1da177e4 4420 if (task->tk_status > 0)
d45f60c6 4421 renew_lease(server, hdr->timestamp);
ec06c096 4422 return 0;
1da177e4
LT		 4423}
4424
5521abfd 4425static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4426 struct nfs_pgio_args *args)
5521abfd
TM		 4427{
4428
4429 if (!nfs4_error_stateid_expired(task->tk_status) ||
4430 nfs4_stateid_is_current(&args->stateid,
4431 args->context,
4432 args->lock_context,
4433 FMODE_READ))
4434 return false;
4435 rpc_restart_call_prepare(task);
4436 return true;
4437}
4438
d45f60c6 4439static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4440{
4441
4442 dprintk("--> %s\n", __func__);
4443
d45f60c6 4444 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4445 return -EAGAIN;
d45f60c6 4446 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4447 return -EAGAIN;
d45f60c6
WAA		 4448 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4449 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4450}
4451
d45f60c6
WAA		 4452static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4453 struct rpc_message *msg)
1da177e4 4454{
d45f60c6 4455 hdr->timestamp = jiffies;
ca857cc1
TM		 4456 if (!hdr->pgio_done_cb)
4457 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4458 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4459 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4460}
4461
d45f60c6
WAA		 4462static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4463 struct nfs_pgio_header *hdr)
ea7c3303 4464{
d45f60c6
WAA		 4465 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4466 &hdr->args.seq_args,
4467 &hdr->res.seq_res,
9b206149 4468 task))
ef1820f9 4469 return 0;
d45f60c6
WAA		 4470 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4471 hdr->args.lock_context,
4472 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4473 return -EIO;
d45f60c6 4474 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4475 return -EIO;
4476 return 0;
1da177e4
LT		 4477}
4478
d45f60c6
WAA		 4479static int nfs4_write_done_cb(struct rpc_task *task,
4480 struct nfs_pgio_header *hdr)
1da177e4 4481{
d45f60c6 4482 struct inode *inode = hdr->inode;
8478eaa1 4483
d45f60c6
WAA		 4484 trace_nfs4_write(hdr, task->tk_status);
4485 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4486 hdr->args.context->state,
4487 NULL) == -EAGAIN) {
d00c5d43 4488 rpc_restart_call_prepare(task);
788e7a89 4489 return -EAGAIN;
1da177e4 4490 }
4f9838c7 4491 if (task->tk_status >= 0) {
d45f60c6 4492 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4493 nfs_writeback_update_inode(hdr);
4f9838c7 4494 }
788e7a89 4495 return 0;
1da177e4
LT		 4496}
4497
5521abfd 4498static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4499 struct nfs_pgio_args *args)
5521abfd
TM		 4500{
4501
4502 if (!nfs4_error_stateid_expired(task->tk_status) ||
4503 nfs4_stateid_is_current(&args->stateid,
4504 args->context,
4505 args->lock_context,
4506 FMODE_WRITE))
4507 return false;
4508 rpc_restart_call_prepare(task);
4509 return true;
4510}
4511
d45f60c6 4512static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4513{
d45f60c6 4514 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4515 return -EAGAIN;
d45f60c6 4516 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4517 return -EAGAIN;
d45f60c6
WAA		 4518 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4519 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4520}
4521
5a37f851 4522static
d45f60c6 4523bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4524{
5a37f851 4525 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4526 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4527 return false;
4528 /* Otherwise, request attributes if and only if we don't hold
4529 * a delegation
4530 */
011e2a7f 4531 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4532}
a69aef14 4533
d45f60c6
WAA		 4534static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4535 struct rpc_message *msg)
1da177e4 4536{
d45f60c6 4537 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4538
d45f60c6
WAA		 4539 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4540 hdr->args.bitmask = NULL;
4541 hdr->res.fattr = NULL;
7ffd1064 4542 } else
d45f60c6 4543 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4544
d45f60c6
WAA		 4545 if (!hdr->pgio_done_cb)
4546 hdr->pgio_done_cb = nfs4_write_done_cb;
4547 hdr->res.server = server;
4548 hdr->timestamp = jiffies;
1da177e4 4549
bdc7f021 4550 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4551 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4552}
4553
0b7c0153 4554static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4555{
d9afbd1b
TM		 4556 nfs4_setup_sequence(NFS_SERVER(data->inode),
4557 &data->args.seq_args,
4558 &data->res.seq_res,
4559 task);
1da177e4
LT		 4560}
4561
0b7c0153 4562static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4563{
1da177e4 4564 struct inode *inode = data->inode;
14516c3a 4565
cc668ab3 4566 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4567 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4568 NULL, NULL) == -EAGAIN) {
d00c5d43 4569 rpc_restart_call_prepare(task);
788e7a89 4570 return -EAGAIN;
1da177e4 4571 }
788e7a89 4572 return 0;
1da177e4
LT		 4573}
4574
0b7c0153 4575static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4576{
4577 if (!nfs4_sequence_done(task, &data->res.seq_res))
4578 return -EAGAIN;
0b7c0153 4579 return data->commit_done_cb(task, data);
5f452431
FI		 4580}
4581
0b7c0153 4582static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4583{
788e7a89 4584 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4585
0b7c0153
FI		 4586 if (data->commit_done_cb == NULL)
4587 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4588 data->res.server = server;
bdc7f021 4589 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4590 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4591}
4592
9bc4e3ca
CL		 4593struct nfs4_renewdata {
4594 struct nfs_client *client;
4595 unsigned long timestamp;
4596};
4597
1da177e4
LT		 4598/*
4599 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4600 * standalone procedure for queueing an asynchronous RENEW.
4601 */
9bc4e3ca 4602static void nfs4_renew_release(void *calldata)
dc96aef9 4603{
9bc4e3ca
CL		 4604 struct nfs4_renewdata *data = calldata;
4605 struct nfs_client *clp = data->client;
dc96aef9 4606
0851de06
AB		 4607 if (atomic_read(&clp->cl_count) > 1)
4608 nfs4_schedule_state_renewal(clp);
4609 nfs_put_client(clp);
9bc4e3ca 4610 kfree(data);
dc96aef9
AB		 4611}
4612
9bc4e3ca 4613static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4614{
9bc4e3ca
CL		 4615 struct nfs4_renewdata *data = calldata;
4616 struct nfs_client *clp = data->client;
4617 unsigned long timestamp = data->timestamp;
1da177e4 4618
c6d01c6f 4619 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4620 switch (task->tk_status) {
4621 case 0:
4622 break;
4623 case -NFS4ERR_LEASE_MOVED:
4624 nfs4_schedule_lease_moved_recovery(clp);
4625 break;
4626 default:
95baa25c 4627 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4628 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4629 return;
4630 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4631 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4632 return;
4633 }
4634 nfs4_schedule_path_down_recovery(clp);
1da177e4 4635 }
452e9352 4636 do_renew_lease(clp, timestamp);
1da177e4
LT		 4637}
4638
963d8fe5
TM		 4639static const struct rpc_call_ops nfs4_renew_ops = {
4640 .rpc_call_done = nfs4_renew_done,
dc96aef9 4641 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4642};
4643
2f60ea6b 4644static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4645{
4646 struct rpc_message msg = {
4647 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4648 .rpc_argp = clp,
b4454fe1 4649 .rpc_cred = cred,
1da177e4 4650 };
9bc4e3ca 4651 struct nfs4_renewdata *data;
1da177e4 4652
2f60ea6b
TM		 4653 if (renew_flags == 0)
4654 return 0;
0851de06
AB		 4655 if (!atomic_inc_not_zero(&clp->cl_count))
4656 return -EIO;
b569ad34 4657 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4658 if (data == NULL)
4659 return -ENOMEM;
4660 data->client = clp;
4661 data->timestamp = jiffies;
bc7a05ca 4662 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4663 &nfs4_renew_ops, data);
1da177e4
LT		 4664}
4665
8534d4ec 4666static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4667{
4668 struct rpc_message msg = {
4669 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4670 .rpc_argp = clp,
b4454fe1 4671 .rpc_cred = cred,
1da177e4
LT		 4672 };
4673 unsigned long now = jiffies;
4674 int status;
4675
bc7a05ca 4676 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4677 if (status < 0)
4678 return status;
452e9352 4679 do_renew_lease(clp, now);
1da177e4
LT		 4680 return 0;
4681}
4682
aa1870af
BF		 4683static inline int nfs4_server_supports_acls(struct nfs_server *server)
4684{
7dd7d959 4685 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4686}
4687
21f498c2
TM		 4688/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4689 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4690 * the stack.
4691 */
21f498c2 4692#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4693
e9e3d724 4694static int buf_to_pages_noslab(const void *buf, size_t buflen,
8fbcf237 4695 struct page **pages)
e9e3d724
NH		 4696{
4697 struct page *newpage, **spages;
4698 int rc = 0;
4699 size_t len;
4700 spages = pages;
4701
4702 do {
21f498c2 4703 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4704 newpage = alloc_page(GFP_KERNEL);
4705
4706 if (newpage == NULL)
4707 goto unwind;
4708 memcpy(page_address(newpage), buf, len);
4709 buf += len;
4710 buflen -= len;
4711 *pages++ = newpage;
4712 rc++;
4713 } while (buflen != 0);
4714
4715 return rc;
4716
4717unwind:
4718 for(; rc > 0; rc--)
4719 __free_page(spages[rc-1]);
4720 return -ENOMEM;
4721}
4722
e50a1c2e
BF		 4723struct nfs4_cached_acl {
4724 int cached;
4725 size_t len;
3e9d4154 4726 char data[0];
e50a1c2e
BF		 4727};
4728
4729static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4730{
4731 struct nfs_inode *nfsi = NFS_I(inode);
4732
4733 spin_lock(&inode->i_lock);
4734 kfree(nfsi->nfs4_acl);
4735 nfsi->nfs4_acl = acl;
4736 spin_unlock(&inode->i_lock);
4737}
4738
4739static void nfs4_zap_acl_attr(struct inode *inode)
4740{
4741 nfs4_set_cached_acl(inode, NULL);
4742}
4743
4744static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4745{
4746 struct nfs_inode *nfsi = NFS_I(inode);
4747 struct nfs4_cached_acl *acl;
4748 int ret = -ENOENT;
4749
4750 spin_lock(&inode->i_lock);
4751 acl = nfsi->nfs4_acl;
4752 if (acl == NULL)
4753 goto out;
4754 if (buf == NULL) /* user is just asking for length */
4755 goto out_len;
4756 if (acl->cached == 0)
4757 goto out;
4758 ret = -ERANGE; /* see getxattr(2) man page */
4759 if (acl->len > buflen)
4760 goto out;
4761 memcpy(buf, acl->data, acl->len);
4762out_len:
4763 ret = acl->len;
4764out:
4765 spin_unlock(&inode->i_lock);
4766 return ret;
4767}
4768
5794d21e 4769static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4770{
4771 struct nfs4_cached_acl *acl;
b291f1b1 4772 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4773
1f1ea6c2 4774 if (buflen <= PAGE_SIZE) {
b291f1b1 4775 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4776 if (acl == NULL)
4777 goto out;
4778 acl->cached = 1;
5794d21e 4779 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4780 } else {
4781 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4782 if (acl == NULL)
4783 goto out;
4784 acl->cached = 0;
4785 }
4786 acl->len = acl_len;
4787out:
4788 nfs4_set_cached_acl(inode, acl);
4789}
4790
bf118a34
AA		 4791/*
4792 * The getxattr API returns the required buffer length when called with a
4793 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4794 * the required buf. On a NULL buf, we send a page of data to the server
4795 * guessing that the ACL request can be serviced by a page. If so, we cache
4796 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4797 * the cache. If not so, we throw away the page, and cache the required
4798 * length. The next getxattr call will then produce another round trip to
4799 * the server, this time with the input buf of the required size.
4800 */
16b4289c 4801static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4802{
bf118a34 4803 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4804 struct nfs_getaclargs args = {
4805 .fh = NFS_FH(inode),
4806 .acl_pages = pages,
4807 .acl_len = buflen,
4808 };
663c79b3
BH		 4809 struct nfs_getaclres res = {
4810 .acl_len = buflen,
4811 };
aa1870af
BF		 4812 struct rpc_message msg = {
4813 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4814 .rpc_argp = &args,
663c79b3 4815 .rpc_resp = &res,
aa1870af 4816 };
21f498c2
TM		 4817 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4818 int ret = -ENOMEM, i;
aa1870af 4819
bf118a34
AA		 4820 /* As long as we're doing a round trip to the server anyway,
4821 * let's be prepared for a page of acl data. */
4822 if (npages == 0)
4823 npages = 1;
21f498c2
TM		 4824 if (npages > ARRAY_SIZE(pages))
4825 return -ERANGE;
5a006899 4826
bf118a34
AA		 4827 for (i = 0; i < npages; i++) {
4828 pages[i] = alloc_page(GFP_KERNEL);
4829 if (!pages[i])
4830 goto out_free;
e50a1c2e 4831 }
5a006899
SP		 4832
4833 /* for decoding across pages */
4834 res.acl_scratch = alloc_page(GFP_KERNEL);
4835 if (!res.acl_scratch)
4836 goto out_free;
4837
bf118a34 4838 args.acl_len = npages * PAGE_SIZE;
5a006899 4839
de040bec 4840 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4841 __func__, buf, buflen, npages, args.acl_len);
4842 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4843 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4844 if (ret)
4845 goto out_free;
bf118a34 4846
1f1ea6c2
TM		 4847 /* Handle the case where the passed-in buffer is too short */
4848 if (res.acl_flags & NFS4_ACL_TRUNC) {
4849 /* Did the user only issue a request for the acl length? */
4850 if (buf == NULL)
4851 goto out_ok;
e50a1c2e 4852 ret = -ERANGE;
1f1ea6c2 4853 goto out_free;
e50a1c2e 4854 }
1f1ea6c2 4855 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4856 if (buf) {
4857 if (res.acl_len > buflen) {
4858 ret = -ERANGE;
4859 goto out_free;
4860 }
1f1ea6c2 4861 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4862 }
1f1ea6c2
TM		 4863out_ok:
4864 ret = res.acl_len;
e50a1c2e 4865out_free:
bf118a34
AA		 4866 for (i = 0; i < npages; i++)
4867 if (pages[i])
4868 __free_page(pages[i]);
331818f1
TM		 4869 if (res.acl_scratch)
4870 __free_page(res.acl_scratch);
aa1870af
BF		 4871 return ret;
4872}
4873
16b4289c
TM		 4874static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4875{
4876 struct nfs4_exception exception = { };
4877 ssize_t ret;
4878 do {
4879 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4880 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4881 if (ret >= 0)
4882 break;
4883 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4884 } while (exception.retry);
4885 return ret;
4886}
4887
e50a1c2e
BF		 4888static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4889{
4890 struct nfs_server *server = NFS_SERVER(inode);
4891 int ret;
4892
4893 if (!nfs4_server_supports_acls(server))
4894 return -EOPNOTSUPP;
4895 ret = nfs_revalidate_inode(server, inode);
4896 if (ret < 0)
4897 return ret;
08a22b39
AK		 4898 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4899 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4900 ret = nfs4_read_cached_acl(inode, buf, buflen);
4901 if (ret != -ENOENT)
bf118a34
AA		 4902 /* -ENOENT is returned if there is no ACL or if there is an ACL
4903 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4904 return ret;
4905 return nfs4_get_acl_uncached(inode, buf, buflen);
4906}
4907
16b4289c 4908static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4909{
4910 struct nfs_server *server = NFS_SERVER(inode);
4911 struct page *pages[NFS4ACL_MAXPAGES];
4912 struct nfs_setaclargs arg = {
4913 .fh = NFS_FH(inode),
4914 .acl_pages = pages,
4915 .acl_len = buflen,
4916 };
73c403a9 4917 struct nfs_setaclres res;
4b580ee3
BF		 4918 struct rpc_message msg = {
4919 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4920 .rpc_argp = &arg,
73c403a9 4921 .rpc_resp = &res,
4b580ee3 4922 };
21f498c2 4923 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4924 int ret, i;
4b580ee3
BF		 4925
4926 if (!nfs4_server_supports_acls(server))
4927 return -EOPNOTSUPP;
21f498c2
TM		 4928 if (npages > ARRAY_SIZE(pages))
4929 return -ERANGE;
8fbcf237 4930 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
e9e3d724
NH		 4931 if (i < 0)
4932 return i;
57ec14c5 4933 nfs4_inode_return_delegation(inode);
7c513058 4934 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4935
4936 /*
4937 * Free each page after tx, so the only ref left is
4938 * held by the network stack
4939 */
4940 for (; i > 0; i--)
4941 put_page(pages[i-1]);
4942
08a22b39
AK		 4943 /*
4944 * Acl update can result in inode attribute update.
4945 * so mark the attribute cache invalid.
4946 */
4947 spin_lock(&inode->i_lock);
4948 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4949 spin_unlock(&inode->i_lock);
f41f7418
TM		 4950 nfs_access_zap_cache(inode);
4951 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4952 return ret;
4953}
4954
16b4289c
TM		 4955static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4956{
4957 struct nfs4_exception exception = { };
4958 int err;
4959 do {
c1578b76
TM		 4960 err = __nfs4_proc_set_acl(inode, buf, buflen);
4961 trace_nfs4_set_acl(inode, err);
4962 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4963 &exception);
4964 } while (exception.retry);
4965 return err;
4966}
4967
aa9c2669
DQ		 4968#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4969static int _nfs4_get_security_label(struct inode *inode, void *buf,
4970 size_t buflen)
4971{
4972 struct nfs_server *server = NFS_SERVER(inode);
4973 struct nfs_fattr fattr;
4974 struct nfs4_label label = {0, 0, buflen, buf};
4975
4976 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4977 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4978 .fh = NFS_FH(inode),
4979 .bitmask = bitmask,
4980 };
4981 struct nfs4_getattr_res res = {
4982 .fattr = &fattr,
4983 .label = &label,
4984 .server = server,
4985 };
4986 struct rpc_message msg = {
4987 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4988 .rpc_argp = &arg,
aa9c2669
DQ		 4989 .rpc_resp = &res,
4990 };
4991 int ret;
4992
4993 nfs_fattr_init(&fattr);
4994
fcb63a9b 4995 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4996 if (ret)
4997 return ret;
4998 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4999 return -ENOENT;
5000 if (buflen < label.len)
5001 return -ERANGE;
5002 return 0;
5003}
5004
5005static int nfs4_get_security_label(struct inode *inode, void *buf,
5006 size_t buflen)
5007{
5008 struct nfs4_exception exception = { };
5009 int err;
5010
5011 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5012 return -EOPNOTSUPP;
5013
5014 do {
c1578b76
TM		 5015 err = _nfs4_get_security_label(inode, buf, buflen);
5016 trace_nfs4_get_security_label(inode, err);
5017 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5018 &exception);
5019 } while (exception.retry);
5020 return err;
5021}
5022
5023static int _nfs4_do_set_security_label(struct inode *inode,
5024 struct nfs4_label *ilabel,
5025 struct nfs_fattr *fattr,
5026 struct nfs4_label *olabel)
5027{
5028
5029 struct iattr sattr = {0};
5030 struct nfs_server *server = NFS_SERVER(inode);
5031 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 5032 struct nfs_setattrargs arg = {
aa9c2669
DQ		 5033 .fh = NFS_FH(inode),
5034 .iap = &sattr,
5035 .server = server,
5036 .bitmask = bitmask,
5037 .label = ilabel,
5038 };
5039 struct nfs_setattrres res = {
5040 .fattr = fattr,
5041 .label = olabel,
5042 .server = server,
5043 };
5044 struct rpc_message msg = {
5045 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 5046 .rpc_argp = &arg,
aa9c2669
DQ		 5047 .rpc_resp = &res,
5048 };
5049 int status;
5050
12207f69 5051 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 5052
12207f69 5053 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 5054 if (status)
5055 dprintk("%s failed: %d\n", __func__, status);
5056
5057 return status;
5058}
5059
5060static int nfs4_do_set_security_label(struct inode *inode,
5061 struct nfs4_label *ilabel,
5062 struct nfs_fattr *fattr,
5063 struct nfs4_label *olabel)
5064{
5065 struct nfs4_exception exception = { };
5066 int err;
5067
5068 do {
c1578b76
TM		 5069 err = _nfs4_do_set_security_label(inode, ilabel,
5070 fattr, olabel);
5071 trace_nfs4_set_security_label(inode, err);
5072 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5073 &exception);
5074 } while (exception.retry);
5075 return err;
5076}
5077
5078static int
59301226 5079nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
aa9c2669
DQ		 5080{
5081 struct nfs4_label ilabel, *olabel = NULL;
5082 struct nfs_fattr fattr;
5083 struct rpc_cred *cred;
aa9c2669
DQ		 5084 int status;
5085
5086 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5087 return -EOPNOTSUPP;
5088
5089 nfs_fattr_init(&fattr);
5090
5091 ilabel.pi = 0;
5092 ilabel.lfs = 0;
5093 ilabel.label = (char *)buf;
5094 ilabel.len = buflen;
5095
5096 cred = rpc_lookup_cred();
5097 if (IS_ERR(cred))
5098 return PTR_ERR(cred);
5099
5100 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5101 if (IS_ERR(olabel)) {
5102 status = -PTR_ERR(olabel);
5103 goto out;
5104 }
5105
5106 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5107 if (status == 0)
5108 nfs_setsecurity(inode, &fattr, olabel);
5109
5110 nfs4_label_free(olabel);
5111out:
5112 put_rpccred(cred);
5113 return status;
5114}
5115#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5116
5117
f092075d
CL		 5118static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5119 nfs4_verifier *bootverf)
cd93710e
CL		 5120{
5121 __be32 verf[2];
5122
2c820d9a
CL		 5123 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5124 /* An impossible timestamp guarantees this value
5125 * will never match a generated boot time. */
5126 verf[0] = 0;
17f26b12 5127 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 5128 } else {
f092075d 5129 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 5130 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
5131 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 5132 }
cd93710e
CL		 5133 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5134}
5135
a3192688
JL		 5136static int
5137nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 5138{
a3192688
JL		 5139 size_t len;
5140 char *str;
e984a55a 5141
ceb3a16c 5142 if (clp->cl_owner_id != NULL)
a3192688 5143 return 0;
4a3e5779 5144
a3192688 5145 rcu_read_lock();
4a70316c 5146 len = 14 + strlen(clp->cl_ipaddr) + 1 +
a3192688
JL		 5147 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5148 1 +
5149 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5150 1;
5151 rcu_read_unlock();
5152
5153 if (len > NFS4_OPAQUE_LIMIT + 1)
5154 return -EINVAL;
5155
5156 /*
5157 * Since this string is allocated at mount time, and held until the
5158 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5159 * about a memory-reclaim deadlock.
5160 */
5161 str = kmalloc(len, GFP_KERNEL);
5162 if (!str)
5163 return -ENOMEM;
ceb3a16c 5164
e984a55a 5165 rcu_read_lock();
f2dd436e 5166 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
a3192688
JL		 5167 clp->cl_ipaddr,
5168 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5169 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5170 rcu_read_unlock();
a3192688 5171
a3192688
JL		 5172 clp->cl_owner_id = str;
5173 return 0;
e984a55a
CL		 5174}
5175
873e3851
JL		 5176static int
5177nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5178{
873e3851
JL		 5179 size_t len;
5180 char *str;
5181
5182 len = 10 + 10 + 1 + 10 + 1 +
5183 strlen(nfs4_client_id_uniquifier) + 1 +
5184 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5185
5186 if (len > NFS4_OPAQUE_LIMIT + 1)
5187 return -EINVAL;
5188
5189 /*
5190 * Since this string is allocated at mount time, and held until the
5191 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5192 * about a memory-reclaim deadlock.
5193 */
5194 str = kmalloc(len, GFP_KERNEL);
5195 if (!str)
5196 return -ENOMEM;
5197
f2dd436e 5198 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
873e3851
JL		 5199 clp->rpc_ops->version, clp->cl_minorversion,
5200 nfs4_client_id_uniquifier,
5201 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5202 clp->cl_owner_id = str;
5203 return 0;
5204}
5205
5206static int
5207nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5208{
873e3851
JL		 5209 size_t len;
5210 char *str;
ceb3a16c
TM		 5211
5212 if (clp->cl_owner_id != NULL)
873e3851 5213 return 0;
6f2ea7f2
CL		 5214
5215 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5216 return nfs4_init_uniquifier_client_string(clp);
5217
5218 len = 10 + 10 + 1 + 10 + 1 +
5219 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5220
5221 if (len > NFS4_OPAQUE_LIMIT + 1)
5222 return -EINVAL;
5223
5224 /*
5225 * Since this string is allocated at mount time, and held until the
5226 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5227 * about a memory-reclaim deadlock.
5228 */
5229 str = kmalloc(len, GFP_KERNEL);
5230 if (!str)
5231 return -ENOMEM;
5232
f2dd436e 5233 scnprintf(str, len, "Linux NFSv%u.%u %s",
873e3851
JL		 5234 clp->rpc_ops->version, clp->cl_minorversion,
5235 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5236 clp->cl_owner_id = str;
5237 return 0;
e984a55a
CL		 5238}
5239
706cb8db
CL		 5240/*
5241 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5242 * services. Advertise one based on the address family of the
5243 * clientaddr.
5244 */
5245static unsigned int
5246nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5247{
5248 if (strchr(clp->cl_ipaddr, ':') != NULL)
5249 return scnprintf(buf, len, "tcp6");
5250 else
5251 return scnprintf(buf, len, "tcp");
5252}
5253
f11b2a1c
JL		 5254static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5255{
5256 struct nfs4_setclientid *sc = calldata;
5257
5258 if (task->tk_status == 0)
5259 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5260}
5261
5262static const struct rpc_call_ops nfs4_setclientid_ops = {
5263 .rpc_call_done = nfs4_setclientid_done,
5264};
5265
6bbb4ae8
CL		 5266/**
5267 * nfs4_proc_setclientid - Negotiate client ID
5268 * @clp: state data structure
5269 * @program: RPC program for NFSv4 callback service
5270 * @port: IP port number for NFS4 callback service
5271 * @cred: RPC credential to use for this call
5272 * @res: where to place the result
5273 *
5274 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5275 */
bb8b27e5
TM		 5276int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5277 unsigned short port, struct rpc_cred *cred,
5278 struct nfs4_setclientid_res *res)
1da177e4
LT		 5279{
5280 nfs4_verifier sc_verifier;
5281 struct nfs4_setclientid setclientid = {
5282 .sc_verifier = &sc_verifier,
5283 .sc_prog = program,
3a6bb738 5284 .sc_clnt = clp,
1da177e4
LT		 5285 };
5286 struct rpc_message msg = {
5287 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5288 .rpc_argp = &setclientid,
bb8b27e5 5289 .rpc_resp = res,
286d7d6a 5290 .rpc_cred = cred,
1da177e4 5291 };
f11b2a1c
JL		 5292 struct rpc_task *task;
5293 struct rpc_task_setup task_setup_data = {
5294 .rpc_client = clp->cl_rpcclient,
5295 .rpc_message = &msg,
5296 .callback_ops = &nfs4_setclientid_ops,
5297 .callback_data = &setclientid,
5298 .flags = RPC_TASK_TIMEOUT,
5299 };
6bbb4ae8 5300 int status;
1da177e4 5301
de734831 5302 /* nfs_client_id4 */
f092075d 5303 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5304
5305 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5306 status = nfs4_init_uniform_client_string(clp);
5307 else
a3192688 5308 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5309
5310 if (status)
5311 goto out;
3a6bb738 5312
de734831 5313 /* cb_client4 */
706cb8db
CL		 5314 setclientid.sc_netid_len =
5315 nfs4_init_callback_netid(clp,
5316 setclientid.sc_netid,
5317 sizeof(setclientid.sc_netid));
de734831 5318 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5319 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5320 clp->cl_ipaddr, port >> 8, port & 255);
5321
3a6bb738 5322 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5323 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5324 clp->cl_owner_id);
f11b2a1c
JL		 5325 task = rpc_run_task(&task_setup_data);
5326 if (IS_ERR(task)) {
5327 status = PTR_ERR(task);
5328 goto out;
5329 }
5330 status = task->tk_status;
5331 if (setclientid.sc_cred) {
5332 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5333 put_rpccred(setclientid.sc_cred);
5334 }
5335 rpc_put_task(task);
5336out:
c6d01c6f 5337 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5338 dprintk("NFS reply setclientid: %d\n", status);
5339 return status;
1da177e4
LT		 5340}
5341
6bbb4ae8
CL		 5342/**
5343 * nfs4_proc_setclientid_confirm - Confirm client ID
5344 * @clp: state data structure
5345 * @res: result of a previous SETCLIENTID
5346 * @cred: RPC credential to use for this call
5347 *
5348 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5349 */
fd954ae1 5350int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5351 struct nfs4_setclientid_res *arg,
5352 struct rpc_cred *cred)
1da177e4 5353{
1da177e4
LT		 5354 struct rpc_message msg = {
5355 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5356 .rpc_argp = arg,
286d7d6a 5357 .rpc_cred = cred,
1da177e4 5358 };
1da177e4
LT		 5359 int status;
5360
6bbb4ae8
CL		 5361 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5362 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5363 clp->cl_clientid);
1bd714f2 5364 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5365 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5366 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5367 return status;
5368}
5369
fe650407
TM		 5370struct nfs4_delegreturndata {
5371 struct nfs4_delegreturnargs args;
fa178f29 5372 struct nfs4_delegreturnres res;
fe650407
TM		 5373 struct nfs_fh fh;
5374 nfs4_stateid stateid;
26e976a8 5375 unsigned long timestamp;
fa178f29 5376 struct nfs_fattr fattr;
fe650407 5377 int rpc_status;
039b756a
PT		 5378 struct inode *inode;
5379 bool roc;
5380 u32 roc_barrier;
fe650407
TM		 5381};
5382
fe650407
TM		 5383static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5384{
5385 struct nfs4_delegreturndata *data = calldata;
938e1010 5386
14516c3a
TM		 5387 if (!nfs4_sequence_done(task, &data->res.seq_res))
5388 return;
938e1010 5389
ca8acf8d 5390 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5391 switch (task->tk_status) {
79708861 5392 case 0:
fa178f29 5393 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5394 case -NFS4ERR_ADMIN_REVOKED:
5395 case -NFS4ERR_DELEG_REVOKED:
5396 case -NFS4ERR_BAD_STATEID:
5397 case -NFS4ERR_OLD_STATEID:
5398 case -NFS4ERR_STALE_STATEID:
5399 case -NFS4ERR_EXPIRED:
5400 task->tk_status = 0;
039b756a
PT		 5401 if (data->roc)
5402 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5403 break;
79708861 5404 default:
8478eaa1
N		 5405 if (nfs4_async_handle_error(task, data->res.server,
5406 NULL, NULL) == -EAGAIN) {
d00c5d43 5407 rpc_restart_call_prepare(task);
79708861
RL		 5408 return;
5409 }
5410 }
5411 data->rpc_status = task->tk_status;
fe650407
TM		 5412}
5413
5414static void nfs4_delegreturn_release(void *calldata)
5415{
039b756a 5416 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5417 struct inode *inode = data->inode;
039b756a 5418
ea7c38fe
TM		 5419 if (inode) {
5420 if (data->roc)
5421 pnfs_roc_release(inode);
5422 nfs_iput_and_deactive(inode);
5423 }
fe650407
TM		 5424 kfree(calldata);
5425}
5426
938e1010
AA		 5427static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5428{
5429 struct nfs4_delegreturndata *d_data;
5430
5431 d_data = (struct nfs4_delegreturndata *)data;
5432
500d701f
PT		 5433 if (nfs4_wait_on_layoutreturn(d_data->inode, task))
5434 return;
5435
4ff376fe
TM		 5436 if (d_data->roc)
5437 pnfs_roc_get_barrier(d_data->inode, &d_data->roc_barrier);
039b756a 5438
d9afbd1b
TM		 5439 nfs4_setup_sequence(d_data->res.server,
5440 &d_data->args.seq_args,
5441 &d_data->res.seq_res,
5442 task);
938e1010 5443}
938e1010 5444
c8d149f3 5445static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5446 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5447 .rpc_call_done = nfs4_delegreturn_done,
5448 .rpc_release = nfs4_delegreturn_release,
5449};
5450
e6f81075 5451static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5452{
5453 struct nfs4_delegreturndata *data;
fa178f29 5454 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5455 struct rpc_task *task;
5138fde0
TM		 5456 struct rpc_message msg = {
5457 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5458 .rpc_cred = cred,
5459 };
c970aa85
TM		 5460 struct rpc_task_setup task_setup_data = {
5461 .rpc_client = server->client,
5138fde0 5462 .rpc_message = &msg,
c970aa85
TM		 5463 .callback_ops = &nfs4_delegreturn_ops,
5464 .flags = RPC_TASK_ASYNC,
5465 };
e6f81075 5466 int status = 0;
fe650407 5467
8535b2be 5468 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5469 if (data == NULL)
5470 return -ENOMEM;
a9c92d6b 5471 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
99ade3c7
AE		 5472
5473 nfs4_state_protect(server->nfs_client,
5474 NFS_SP4_MACH_CRED_CLEANUP,
5475 &task_setup_data.rpc_client, &msg);
5476
fe650407
TM		 5477 data->args.fhandle = &data->fh;
5478 data->args.stateid = &data->stateid;
9e907fec 5479 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5480 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5481 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5482 data->res.fattr = &data->fattr;
5483 data->res.server = server;
5138fde0 5484 nfs_fattr_init(data->res.fattr);
26e976a8 5485 data->timestamp = jiffies;
fe650407 5486 data->rpc_status = 0;
ea7c38fe
TM		 5487 data->inode = nfs_igrab_and_active(inode);
5488 if (data->inode)
5489 data->roc = nfs4_roc(inode);
fe650407 5490
c970aa85 5491 task_setup_data.callback_data = data;
1174dd1f
TM		 5492 msg.rpc_argp = &data->args;
5493 msg.rpc_resp = &data->res;
c970aa85 5494 task = rpc_run_task(&task_setup_data);
7a1218a2 5495 if (IS_ERR(task))
fe650407 5496 return PTR_ERR(task);
e6f81075
TM		 5497 if (!issync)
5498 goto out;
fe650407 5499 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5500 if (status != 0)
5501 goto out;
5502 status = data->rpc_status;
e144cbcc
TM		 5503 if (status == 0)
5504 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5505 else
5506 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5507out:
e6b3c4db 5508 rpc_put_task(task);
fe650407 5509 return status;
1da177e4
LT		 5510}
5511
e6f81075 5512int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5513{
5514 struct nfs_server *server = NFS_SERVER(inode);
5515 struct nfs4_exception exception = { };
5516 int err;
5517 do {
e6f81075 5518 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
48c9579a 5519 trace_nfs4_delegreturn(inode, stateid, err);
1da177e4
LT		 5520 switch (err) {
5521 case -NFS4ERR_STALE_STATEID:
5522 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5523 case 0:
5524 return 0;
5525 }
5526 err = nfs4_handle_exception(server, err, &exception);
5527 } while (exception.retry);
5528 return err;
5529}
5530
5531#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5532#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5533
5534/*
5535 * sleep, with exponential backoff, and retry the LOCK operation.
5536 */
5537static unsigned long
5538nfs4_set_lock_task_retry(unsigned long timeout)
5539{
416ad3c9 5540 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5541 timeout <<= 1;
5542 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5543 return NFS4_LOCK_MAXTIMEOUT;
5544 return timeout;
5545}
5546
1da177e4
LT		 5547static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5548{
5549 struct inode *inode = state->inode;
5550 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5551 struct nfs_client *clp = server->nfs_client;
911d1aaf 5552 struct nfs_lockt_args arg = {
1da177e4 5553 .fh = NFS_FH(inode),
911d1aaf 5554 .fl = request,
1da177e4 5555 };
911d1aaf
TM		 5556 struct nfs_lockt_res res = {
5557 .denied = request,
1da177e4
LT		 5558 };
5559 struct rpc_message msg = {
5560 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5561 .rpc_argp = &arg,
5562 .rpc_resp = &res,
5563 .rpc_cred = state->owner->so_cred,
5564 };
1da177e4
LT		 5565 struct nfs4_lock_state *lsp;
5566 int status;
5567
911d1aaf 5568 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5569 status = nfs4_set_lock_state(state, request);
5570 if (status != 0)
5571 goto out;
5572 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5573 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5574 arg.lock_owner.s_dev = server->s_dev;
7c513058 5575 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5576 switch (status) {
5577 case 0:
5578 request->fl_type = F_UNLCK;
5579 break;
5580 case -NFS4ERR_DENIED:
5581 status = 0;
1da177e4 5582 }
70cc6487 5583 request->fl_ops->fl_release_private(request);
a6f951dd 5584 request->fl_ops = NULL;
8d0a8a9d 5585out:
1da177e4
LT		 5586 return status;
5587}
5588
5589static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5590{
5591 struct nfs4_exception exception = { };
5592 int err;
5593
5594 do {
d1b748a5
TM		 5595 err = _nfs4_proc_getlk(state, cmd, request);
5596 trace_nfs4_get_lock(request, state, cmd, err);
5597 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5598 &exception);
5599 } while (exception.retry);
5600 return err;
5601}
5602
83bfff23 5603static int do_vfs_lock(struct inode *inode, struct file_lock *fl)
1da177e4 5604{
4f656367 5605 return locks_lock_inode_wait(inode, fl);
1da177e4
LT		 5606}
5607
faf5f49c 5608struct nfs4_unlockdata {
911d1aaf
TM		 5609 struct nfs_locku_args arg;
5610 struct nfs_locku_res res;
faf5f49c
TM		 5611 struct nfs4_lock_state *lsp;
5612 struct nfs_open_context *ctx;
911d1aaf 5613 struct file_lock fl;
516285eb 5614 struct nfs_server *server;
26e976a8 5615 unsigned long timestamp;
faf5f49c
TM		 5616};
5617
911d1aaf
TM		 5618static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5619 struct nfs_open_context *ctx,
5620 struct nfs4_lock_state *lsp,
5621 struct nfs_seqid *seqid)
5622{
5623 struct nfs4_unlockdata *p;
5624 struct inode *inode = lsp->ls_state->inode;
5625
8535b2be 5626 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5627 if (p == NULL)
5628 return NULL;
5629 p->arg.fh = NFS_FH(inode);
5630 p->arg.fl = &p->fl;
5631 p->arg.seqid = seqid;
c1d51931 5632 p->res.seqid = seqid;
911d1aaf
TM		 5633 p->lsp = lsp;
5634 atomic_inc(&lsp->ls_count);
5635 /* Ensure we don't close file until we're done freeing locks! */
5636 p->ctx = get_nfs_open_context(ctx);
5637 memcpy(&p->fl, fl, sizeof(p->fl));
5638 p->server = NFS_SERVER(inode);
5639 return p;
5640}
5641
06f814a3 5642static void nfs4_locku_release_calldata(void *data)
faf5f49c 5643{
963d8fe5 5644 struct nfs4_unlockdata *calldata = data;
911d1aaf 5645 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5646 nfs4_put_lock_state(calldata->lsp);
5647 put_nfs_open_context(calldata->ctx);
5648 kfree(calldata);
faf5f49c
TM		 5649}
5650
963d8fe5 5651static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5652{
963d8fe5 5653 struct nfs4_unlockdata *calldata = data;
faf5f49c 5654
14516c3a
TM		 5655 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5656 return;
faf5f49c
TM		 5657 switch (task->tk_status) {
5658 case 0:
26e976a8 5659 renew_lease(calldata->server, calldata->timestamp);
83bfff23 5660 do_vfs_lock(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 5661 if (nfs4_update_lock_stateid(calldata->lsp,
5662 &calldata->res.stateid))
5663 break;
9e33bed5
TM		 5664 case -NFS4ERR_BAD_STATEID:
5665 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5666 case -NFS4ERR_STALE_STATEID:
5667 case -NFS4ERR_EXPIRED:
425c1d4e
TM		 5668 if (!nfs4_stateid_match(&calldata->arg.stateid,
5669 &calldata->lsp->ls_stateid))
5670 rpc_restart_call_prepare(task);
faf5f49c
TM		 5671 break;
5672 default:
8478eaa1
N		 5673 if (nfs4_async_handle_error(task, calldata->server,
5674 NULL, NULL) == -EAGAIN)
d00c5d43 5675 rpc_restart_call_prepare(task);
faf5f49c 5676 }
2b1bc308 5677 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5678}
5679
4ce70ada 5680static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5681{
4ce70ada 5682 struct nfs4_unlockdata *calldata = data;
faf5f49c 5683
911d1aaf 5684 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5685 goto out_wait;
425c1d4e 5686 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5687 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5688 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5689 goto out_no_action;
faf5f49c 5690 }
26e976a8 5691 calldata->timestamp = jiffies;
035168ab 5692 if (nfs4_setup_sequence(calldata->server,
a893693c 5693 &calldata->arg.seq_args,
2240a9e2
TM		 5694 &calldata->res.seq_res,
5695 task) != 0)
5696 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5697 return;
5698out_no_action:
5699 task->tk_action = NULL;
5700out_wait:
5701 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5702}
5703
963d8fe5 5704static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5705 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5706 .rpc_call_done = nfs4_locku_done,
06f814a3 5707 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5708};
5709
a5d16a4d
TM		 5710static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5711 struct nfs_open_context *ctx,
5712 struct nfs4_lock_state *lsp,
5713 struct nfs_seqid *seqid)
5714{
5715 struct nfs4_unlockdata *data;
5138fde0
TM		 5716 struct rpc_message msg = {
5717 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5718 .rpc_cred = ctx->cred,
5719 };
c970aa85
TM		 5720 struct rpc_task_setup task_setup_data = {
5721 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5722 .rpc_message = &msg,
c970aa85 5723 .callback_ops = &nfs4_locku_ops,
101070ca 5724 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5725 .flags = RPC_TASK_ASYNC,
5726 };
a5d16a4d 5727
fa940720
WAA		 5728 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5729 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5730
137d6aca
FF		 5731 /* Ensure this is an unlock - when canceling a lock, the
5732 * canceled lock is passed in, and it won't be an unlock.
5733 */
5734 fl->fl_type = F_UNLCK;
5735
a5d16a4d
TM		 5736 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5737 if (data == NULL) {
5738 nfs_free_seqid(seqid);
5739 return ERR_PTR(-ENOMEM);
5740 }
5741
a9c92d6b 5742 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5743 msg.rpc_argp = &data->arg;
5744 msg.rpc_resp = &data->res;
c970aa85
TM		 5745 task_setup_data.callback_data = data;
5746 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5747}
5748
faf5f49c
TM		 5749static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5750{
65b62a29
TM		 5751 struct inode *inode = state->inode;
5752 struct nfs4_state_owner *sp = state->owner;
5753 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5754 struct nfs_seqid *seqid;
1da177e4 5755 struct nfs4_lock_state *lsp;
06f814a3 5756 struct rpc_task *task;
b4019c0e 5757 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 5758 int status = 0;
536ff0f8 5759 unsigned char fl_flags = request->fl_flags;
faf5f49c 5760
8d0a8a9d 5761 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5762 /* Unlock _before_ we do the RPC call */
5763 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5764 /* Exclude nfs_delegation_claim_locks() */
5765 mutex_lock(&sp->so_delegreturn_mutex);
5766 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 5767 down_read(&nfsi->rwsem);
83bfff23 5768 if (do_vfs_lock(inode, request) == -ENOENT) {
19e03c57 5769 up_read(&nfsi->rwsem);
65b62a29 5770 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5771 goto out;
19e03c57
TM		 5772 }
5773 up_read(&nfsi->rwsem);
65b62a29 5774 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5775 if (status != 0)
9b073574
TM		 5776 goto out;
5777 /* Is this a delegated lock? */
8d0a8a9d 5778 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5779 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5780 goto out;
b4019c0e
TM		 5781 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5782 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5783 status = -ENOMEM;
badc76dd 5784 if (IS_ERR(seqid))
9b073574 5785 goto out;
cd3758e3 5786 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5787 status = PTR_ERR(task);
5788 if (IS_ERR(task))
9b073574 5789 goto out;
a5d16a4d 5790 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5791 rpc_put_task(task);
9b073574 5792out:
536ff0f8 5793 request->fl_flags = fl_flags;
d1b748a5 5794 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5795 return status;
5796}
5797
a5d16a4d
TM		 5798struct nfs4_lockdata {
5799 struct nfs_lock_args arg;
5800 struct nfs_lock_res res;
5801 struct nfs4_lock_state *lsp;
5802 struct nfs_open_context *ctx;
5803 struct file_lock fl;
26e976a8 5804 unsigned long timestamp;
a5d16a4d
TM		 5805 int rpc_status;
5806 int cancelled;
66179efe 5807 struct nfs_server *server;
a5d16a4d
TM		 5808};
5809
5810static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5811 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5812 gfp_t gfp_mask)
1da177e4 5813{
a5d16a4d
TM		 5814 struct nfs4_lockdata *p;
5815 struct inode *inode = lsp->ls_state->inode;
1da177e4 5816 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 5817 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 5818
8535b2be 5819 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5820 if (p == NULL)
5821 return NULL;
5822
5823 p->arg.fh = NFS_FH(inode);
5824 p->arg.fl = &p->fl;
8535b2be 5825 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 5826 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 5827 goto out_free;
b4019c0e
TM		 5828 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5829 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 5830 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 5831 goto out_free_seqid;
7539bbab 5832 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5833 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5834 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5835 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5836 p->lsp = lsp;
66179efe 5837 p->server = server;
a5d16a4d
TM		 5838 atomic_inc(&lsp->ls_count);
5839 p->ctx = get_nfs_open_context(ctx);
feaff8e5 5840 get_file(fl->fl_file);
a5d16a4d
TM		 5841 memcpy(&p->fl, fl, sizeof(p->fl));
5842 return p;
2f74c0a0
TM		 5843out_free_seqid:
5844 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5845out_free:
5846 kfree(p);
5847 return NULL;
5848}
5849
5850static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5851{
5852 struct nfs4_lockdata *data = calldata;
5853 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5854
3110ff80 5855 dprintk("%s: begin!\n", __func__);
2f74c0a0 5856 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5857 goto out_wait;
a5d16a4d 5858 /* Do we need to do an open_to_lock_owner? */
6b447539 5859 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 5860 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5861 goto out_release_lock_seqid;
8fe72bac 5862 }
425c1d4e
TM		 5863 nfs4_stateid_copy(&data->arg.open_stateid,
5864 &state->open_stateid);
a5d16a4d 5865 data->arg.new_lock_owner = 1;
c1d51931 5866 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 5867 } else {
2f74c0a0 5868 data->arg.new_lock_owner = 0;
425c1d4e
TM		 5869 nfs4_stateid_copy(&data->arg.lock_stateid,
5870 &data->lsp->ls_stateid);
5871 }
5d422301
TM		 5872 if (!nfs4_valid_open_stateid(state)) {
5873 data->rpc_status = -EBADF;
5874 task->tk_action = NULL;
5875 goto out_release_open_seqid;
5876 }
26e976a8 5877 data->timestamp = jiffies;
035168ab
TM		 5878 if (nfs4_setup_sequence(data->server,
5879 &data->arg.seq_args,
2240a9e2 5880 &data->res.seq_res,
d9afbd1b 5881 task) == 0)
66179efe 5882 return;
5d422301 5883out_release_open_seqid:
2240a9e2
TM		 5884 nfs_release_seqid(data->arg.open_seqid);
5885out_release_lock_seqid:
5886 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5887out_wait:
5888 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5889 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5890}
5891
a5d16a4d
TM		 5892static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5893{
5894 struct nfs4_lockdata *data = calldata;
39071e6f 5895 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 5896
3110ff80 5897 dprintk("%s: begin!\n", __func__);
a5d16a4d 5898
14516c3a
TM		 5899 if (!nfs4_sequence_done(task, &data->res.seq_res))
5900 return;
66179efe 5901
a5d16a4d 5902 data->rpc_status = task->tk_status;
425c1d4e
TM		 5903 switch (task->tk_status) {
5904 case 0:
2b0143b5 5905 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 5906 data->timestamp);
c69899a1
TM		 5907 if (data->arg.new_lock) {
5908 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
83bfff23 5909 if (do_vfs_lock(lsp->ls_state->inode, &data->fl) < 0) {
c69899a1
TM		 5910 rpc_restart_call_prepare(task);
5911 break;
5912 }
5913 }
39071e6f
TM		 5914 if (data->arg.new_lock_owner != 0) {
5915 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5916 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5917 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5918 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5919 rpc_restart_call_prepare(task);
425c1d4e
TM		 5920 break;
5921 case -NFS4ERR_BAD_STATEID:
5922 case -NFS4ERR_OLD_STATEID:
5923 case -NFS4ERR_STALE_STATEID:
5924 case -NFS4ERR_EXPIRED:
5925 if (data->arg.new_lock_owner != 0) {
5926 if (!nfs4_stateid_match(&data->arg.open_stateid,
5927 &lsp->ls_state->open_stateid))
5928 rpc_restart_call_prepare(task);
5929 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5930 &lsp->ls_stateid))
5931 rpc_restart_call_prepare(task);
a5d16a4d 5932 }
3110ff80 5933 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5934}
5935
5936static void nfs4_lock_release(void *calldata)
5937{
5938 struct nfs4_lockdata *data = calldata;
5939
3110ff80 5940 dprintk("%s: begin!\n", __func__);
2f74c0a0 5941 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5942 if (data->cancelled != 0) {
5943 struct rpc_task *task;
5944 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5945 data->arg.lock_seqid);
5946 if (!IS_ERR(task))
bf294b41 5947 rpc_put_task_async(task);
3110ff80 5948 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5949 } else
5950 nfs_free_seqid(data->arg.lock_seqid);
5951 nfs4_put_lock_state(data->lsp);
5952 put_nfs_open_context(data->ctx);
feaff8e5 5953 fput(data->fl.fl_file);
a5d16a4d 5954 kfree(data);
3110ff80 5955 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5956}
5957
5958static const struct rpc_call_ops nfs4_lock_ops = {
5959 .rpc_call_prepare = nfs4_lock_prepare,
5960 .rpc_call_done = nfs4_lock_done,
5961 .rpc_release = nfs4_lock_release,
5962};
5963
2bee72a6
TM		 5964static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5965{
2bee72a6
TM		 5966 switch (error) {
5967 case -NFS4ERR_ADMIN_REVOKED:
5968 case -NFS4ERR_BAD_STATEID:
ecac799a 5969 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5970 if (new_lock_owner != 0 ||
795a88c9 5971 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5972 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5973 break;
5974 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5975 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5976 case -NFS4ERR_EXPIRED:
5977 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5978 };
5979}
5980
afe6c27c 5981static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5982{
5983 struct nfs4_lockdata *data;
5984 struct rpc_task *task;
5138fde0
TM		 5985 struct rpc_message msg = {
5986 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5987 .rpc_cred = state->owner->so_cred,
5988 };
c970aa85
TM		 5989 struct rpc_task_setup task_setup_data = {
5990 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5991 .rpc_message = &msg,
c970aa85 5992 .callback_ops = &nfs4_lock_ops,
101070ca 5993 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5994 .flags = RPC_TASK_ASYNC,
5995 };
a5d16a4d
TM		 5996 int ret;
5997
3110ff80 5998 dprintk("%s: begin!\n", __func__);
cd3758e3 5999 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 6000 fl->fl_u.nfs4_fl.owner,
6001 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 6002 if (data == NULL)
6003 return -ENOMEM;
6004 if (IS_SETLKW(cmd))
6005 data->arg.block = 1;
a9c92d6b 6006 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 6007 msg.rpc_argp = &data->arg;
6008 msg.rpc_resp = &data->res;
c970aa85 6009 task_setup_data.callback_data = data;
8fe72bac
TM		 6010 if (recovery_type > NFS_LOCK_NEW) {
6011 if (recovery_type == NFS_LOCK_RECLAIM)
6012 data->arg.reclaim = NFS_LOCK_RECLAIM;
6013 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 6014 } else
6015 data->arg.new_lock = 1;
c970aa85 6016 task = rpc_run_task(&task_setup_data);
7a1218a2 6017 if (IS_ERR(task))
a5d16a4d 6018 return PTR_ERR(task);
a5d16a4d
TM		 6019 ret = nfs4_wait_for_completion_rpc_task(task);
6020 if (ret == 0) {
6021 ret = data->rpc_status;
2bee72a6
TM		 6022 if (ret)
6023 nfs4_handle_setlk_error(data->server, data->lsp,
6024 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 6025 } else
6026 data->cancelled = 1;
e6b3c4db 6027 rpc_put_task(task);
3110ff80 6028 dprintk("%s: done, ret = %d!\n", __func__, ret);
48c9579a 6029 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
a5d16a4d 6030 return ret;
1da177e4
LT		 6031}
6032
6033static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
6034{
202b50dc 6035 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6036 struct nfs4_exception exception = {
6037 .inode = state->inode,
6038 };
202b50dc
TM		 6039 int err;
6040
6041 do {
42a2d13e
TM		 6042 /* Cache the lock if possible... */
6043 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6044 return 0;
afe6c27c 6045 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 6046 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 6047 break;
6048 nfs4_handle_exception(server, err, &exception);
6049 } while (exception.retry);
6050 return err;
1da177e4
LT		 6051}
6052
6053static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
6054{
202b50dc 6055 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 6056 struct nfs4_exception exception = {
6057 .inode = state->inode,
6058 };
202b50dc
TM		 6059 int err;
6060
6bfc93ef
TM		 6061 err = nfs4_set_lock_state(state, request);
6062 if (err != 0)
6063 return err;
f6de7a39 6064 if (!recover_lost_locks) {
ef1820f9
N		 6065 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
6066 return 0;
6067 }
202b50dc 6068 do {
42a2d13e
TM		 6069 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6070 return 0;
afe6c27c 6071 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 6072 switch (err) {
6073 default:
6074 goto out;
6075 case -NFS4ERR_GRACE:
6076 case -NFS4ERR_DELAY:
6077 nfs4_handle_exception(server, err, &exception);
6078 err = 0;
6079 }
202b50dc 6080 } while (exception.retry);
a9ed2e25 6081out:
202b50dc 6082 return err;
1da177e4
LT		 6083}
6084
f062eb6c 6085#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 6086/**
6087 * nfs41_check_expired_locks - possibly free a lock stateid
6088 *
6089 * @state: NFSv4 state for an inode
6090 *
6091 * Returns NFS_OK if recovery for this stateid is now finished.
6092 * Otherwise a negative NFS4ERR value is returned.
6093 */
b01dd1d8 6094static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 6095{
eb64cf96 6096 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 6097 struct nfs4_lock_state *lsp;
f062eb6c
BS		 6098 struct nfs_server *server = NFS_SERVER(state->inode);
6099
b01dd1d8 6100 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 6101 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 6102 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
6103
6104 status = nfs41_test_stateid(server,
6105 &lsp->ls_stateid,
6106 cred);
08cb47fa 6107 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 6108 if (status != NFS_OK) {
3e60ffdd
CL		 6109 /* Free the stateid unless the server
6110 * informs us the stateid is unrecognized. */
89af2739
CL		 6111 if (status != -NFS4ERR_BAD_STATEID)
6112 nfs41_free_stateid(server,
ab7cb0df
TM		 6113 &lsp->ls_stateid,
6114 cred);
795a88c9 6115 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 6116 ret = status;
6117 }
6118 }
6119 };
6120
6121 return ret;
6122}
6123
6124static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6125{
6126 int status = NFS_OK;
6127
6128 if (test_bit(LK_STATE_IN_USE, &state->flags))
6129 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 6130 if (status != NFS_OK)
6131 status = nfs4_lock_expired(state, request);
6132 return status;
f062eb6c
BS		 6133}
6134#endif
6135
1da177e4
LT		 6136static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6137{
19e03c57 6138 struct nfs_inode *nfsi = NFS_I(state->inode);
11476e9d 6139 struct nfs4_state_owner *sp = state->owner;
01c3b861 6140 unsigned char fl_flags = request->fl_flags;
8e469ebd 6141 int status = -ENOLCK;
1da177e4 6142
8e469ebd
TM		 6143 if ((fl_flags & FL_POSIX) &&
6144 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6145 goto out;
6bfc93ef 6146 /* Is this a delegated open? */
6bfc93ef
TM		 6147 status = nfs4_set_lock_state(state, request);
6148 if (status != 0)
6149 goto out;
01c3b861 6150 request->fl_flags |= FL_ACCESS;
83bfff23 6151 status = do_vfs_lock(state->inode, request);
01c3b861
TM		 6152 if (status < 0)
6153 goto out;
11476e9d 6154 mutex_lock(&sp->so_delegreturn_mutex);
19e03c57 6155 down_read(&nfsi->rwsem);
01c3b861 6156 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6157 /* Yes: cache locks! */
01c3b861 6158 /* ...but avoid races with delegation recall... */
19e03c57 6159 request->fl_flags = fl_flags & ~FL_SLEEP;
83bfff23 6160 status = do_vfs_lock(state->inode, request);
c69899a1 6161 up_read(&nfsi->rwsem);
11476e9d 6162 mutex_unlock(&sp->so_delegreturn_mutex);
9a99af49 6163 goto out;
9a99af49 6164 }
19e03c57 6165 up_read(&nfsi->rwsem);
11476e9d 6166 mutex_unlock(&sp->so_delegreturn_mutex);
c69899a1 6167 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6168out:
6169 request->fl_flags = fl_flags;
1da177e4
LT		 6170 return status;
6171}
6172
6173static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6174{
a1d0b5ee
TM		 6175 struct nfs4_exception exception = {
6176 .state = state,
05ffe24f 6177 .inode = state->inode,
a1d0b5ee 6178 };
1da177e4
LT		 6179 int err;
6180
6181 do {
965b5d67
TM		 6182 err = _nfs4_proc_setlk(state, cmd, request);
6183 if (err == -NFS4ERR_DENIED)
6184 err = -EAGAIN;
1da177e4 6185 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6186 err, &exception);
1da177e4
LT		 6187 } while (exception.retry);
6188 return err;
6189}
6190
6191static int
6192nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6193{
6194 struct nfs_open_context *ctx;
6195 struct nfs4_state *state;
6196 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6197 int status;
6198
6199 /* verify open state */
cd3758e3 6200 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6201 state = ctx->state;
6202
6203 if (request->fl_start < 0 || request->fl_end < 0)
6204 return -EINVAL;
6205
d953126a
TM		 6206 if (IS_GETLK(cmd)) {
6207 if (state != NULL)
6208 return nfs4_proc_getlk(state, F_GETLK, request);
6209 return 0;
6210 }
1da177e4
LT		 6211
6212 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6213 return -EINVAL;
6214
d953126a
TM		 6215 if (request->fl_type == F_UNLCK) {
6216 if (state != NULL)
6217 return nfs4_proc_unlck(state, cmd, request);
6218 return 0;
6219 }
1da177e4 6220
d953126a
TM		 6221 if (state == NULL)
6222 return -ENOLCK;
55725513
TM		 6223 /*
6224 * Don't rely on the VFS having checked the file open mode,
6225 * since it won't do this for flock() locks.
6226 */
f44106e2 6227 switch (request->fl_type) {
55725513
TM		 6228 case F_RDLCK:
6229 if (!(filp->f_mode & FMODE_READ))
6230 return -EBADF;
6231 break;
6232 case F_WRLCK:
6233 if (!(filp->f_mode & FMODE_WRITE))
6234 return -EBADF;
6235 }
6236
1da177e4
LT		 6237 do {
6238 status = nfs4_proc_setlk(state, cmd, request);
6239 if ((status != -EAGAIN) || IS_SETLK(cmd))
6240 break;
6241 timeout = nfs4_set_lock_task_retry(timeout);
6242 status = -ERESTARTSYS;
6243 if (signalled())
6244 break;
6245 } while(status < 0);
1da177e4
LT		 6246 return status;
6247}
6248
db4f2e63 6249int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6250{
6251 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6252 int err;
6253
6254 err = nfs4_set_lock_state(state, fl);
6255 if (err != 0)
db4f2e63 6256 return err;
4a706fa0 6257 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6258 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6259}
6b3b5496 6260
cf470c3e
TM		 6261struct nfs_release_lockowner_data {
6262 struct nfs4_lock_state *lsp;
5ae67c4f 6263 struct nfs_server *server;
cf470c3e 6264 struct nfs_release_lockowner_args args;
b7e63a10 6265 struct nfs_release_lockowner_res res;
60ea6812 6266 unsigned long timestamp;
cf470c3e
TM		 6267};
6268
fbd4bfd1
CL		 6269static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6270{
6271 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6272 struct nfs_server *server = data->server;
cb04ad2a
PT		 6273 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6274 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6275 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6276 data->timestamp = jiffies;
fbd4bfd1
CL		 6277}
6278
6279static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6280{
6281 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6282 struct nfs_server *server = data->server;
6283
b7e63a10 6284 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6285
6286 switch (task->tk_status) {
6287 case 0:
6288 renew_lease(server, data->timestamp);
6289 break;
6290 case -NFS4ERR_STALE_CLIENTID:
6291 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6292 nfs4_schedule_lease_recovery(server->nfs_client);
6293 break;
60ea6812
CL		 6294 case -NFS4ERR_LEASE_MOVED:
6295 case -NFS4ERR_DELAY:
8478eaa1
N		 6296 if (nfs4_async_handle_error(task, server,
6297 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6298 rpc_restart_call_prepare(task);
6299 }
fbd4bfd1
CL		 6300}
6301
d3c7b7cc
TM		 6302static void nfs4_release_lockowner_release(void *calldata)
6303{
cf470c3e 6304 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6305 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6306 kfree(calldata);
6307}
6308
17280175 6309static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6310 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6311 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6312 .rpc_release = nfs4_release_lockowner_release,
6313};
6314
f1cdae87
JL		 6315static void
6316nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6317{
cf470c3e 6318 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6319 struct rpc_message msg = {
6320 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6321 };
6322
6323 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6324 return;
fbd4bfd1 6325
cf470c3e
TM		 6326 data = kmalloc(sizeof(*data), GFP_NOFS);
6327 if (!data)
f1cdae87 6328 return;
cf470c3e 6329 data->lsp = lsp;
5ae67c4f 6330 data->server = server;
cf470c3e
TM		 6331 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6332 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6333 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6334
cf470c3e 6335 msg.rpc_argp = &data->args;
b7e63a10
TM		 6336 msg.rpc_resp = &data->res;
6337 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6338 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6339}
6340
aa1870af
BF		 6341#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6342
d9a82a04 6343static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
59301226
AV		 6344 struct dentry *unused, struct inode *inode,
6345 const char *key, const void *buf,
6346 size_t buflen, int flags)
6b3b5496 6347{
59301226 6348 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 6349}
6350
d9a82a04 6351static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
b296821a
AV		 6352 struct dentry *unused, struct inode *inode,
6353 const char *key, void *buf, size_t buflen)
6b3b5496 6354{
b296821a 6355 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 6356}
6357
764a5c6b 6358static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6b3b5496 6359{
764a5c6b 6360 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6b3b5496
BF		 6361}
6362
c9bccef6 6363#ifdef CONFIG_NFS_V4_SECURITY_LABEL
c9bccef6 6364
d9a82a04 6365static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
59301226
AV		 6366 struct dentry *unused, struct inode *inode,
6367 const char *key, const void *buf,
6368 size_t buflen, int flags)
c9bccef6
DQ		 6369{
6370 if (security_ismaclabel(key))
59301226 6371 return nfs4_set_security_label(inode, buf, buflen);
c9bccef6
DQ		 6372
6373 return -EOPNOTSUPP;
6374}
6375
d9a82a04 6376static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
b296821a
AV		 6377 struct dentry *unused, struct inode *inode,
6378 const char *key, void *buf, size_t buflen)
c9bccef6
DQ		 6379{
6380 if (security_ismaclabel(key))
b296821a 6381 return nfs4_get_security_label(inode, buf, buflen);
c9bccef6
DQ		 6382 return -EOPNOTSUPP;
6383}
6384
c4803c49
AG		 6385static ssize_t
6386nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
c9bccef6 6387{
c4803c49 6388 int len = 0;
c9bccef6 6389
c4803c49
AG		 6390 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
6391 len = security_inode_listsecurity(inode, list, list_len);
6392 if (list_len && len > list_len)
6393 return -ERANGE;
c9bccef6
DQ		 6394 }
6395 return len;
6396}
6397
6398static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6399 .prefix = XATTR_SECURITY_PREFIX,
c9bccef6
DQ		 6400 .get = nfs4_xattr_get_nfs4_label,
6401 .set = nfs4_xattr_set_nfs4_label,
6402};
c9bccef6 6403
c4803c49
AG		 6404#else
6405
6406static ssize_t
6407nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6408{
6409 return 0;
6410}
6411
6412#endif
c9bccef6 6413
533eb461
AA		 6414/*
6415 * nfs_fhget will use either the mounted_on_fileid or the fileid
6416 */
69aaaae1
TM		 6417static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6418{
533eb461
AA		 6419 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6420 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6421 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6422 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6423 return;
6424
6425 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6426 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6427 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6428 fattr->nlink = 2;
6429}
6430
f05d147f
BS		 6431static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6432 const struct qstr *name,
6433 struct nfs4_fs_locations *fs_locations,
6434 struct page *page)
683b57b4
TM		 6435{
6436 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6437 u32 bitmask[3] = {
361e624f 6438 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6439 };
6440 struct nfs4_fs_locations_arg args = {
6441 .dir_fh = NFS_FH(dir),
c228fd3a 6442 .name = name,
683b57b4
TM		 6443 .page = page,
6444 .bitmask = bitmask,
6445 };
22958463
BH		 6446 struct nfs4_fs_locations_res res = {
6447 .fs_locations = fs_locations,
6448 };
683b57b4
TM		 6449 struct rpc_message msg = {
6450 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6451 .rpc_argp = &args,
22958463 6452 .rpc_resp = &res,
683b57b4
TM		 6453 };
6454 int status;
6455
3110ff80 6456 dprintk("%s: start\n", __func__);
533eb461
AA		 6457
6458 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6459 * is not supported */
6460 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6461 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6462 else
6463 bitmask[0] |= FATTR4_WORD0_FILEID;
6464
c228fd3a 6465 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6466 fs_locations->server = server;
830b8e33 6467 fs_locations->nlocations = 0;
f05d147f 6468 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6469 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6470 return status;
6471}
6472
f05d147f
BS		 6473int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6474 const struct qstr *name,
6475 struct nfs4_fs_locations *fs_locations,
6476 struct page *page)
db0a9593
BS		 6477{
6478 struct nfs4_exception exception = { };
6479 int err;
6480 do {
078ea3df
TM		 6481 err = _nfs4_proc_fs_locations(client, dir, name,
6482 fs_locations, page);
6483 trace_nfs4_get_fs_locations(dir, name, err);
6484 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6485 &exception);
6486 } while (exception.retry);
6487 return err;
6488}
6489
b03d735b
CL		 6490/*
6491 * This operation also signals the server that this client is
6492 * performing migration recovery. The server can stop returning
6493 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6494 * appended to this compound to identify the client ID which is
6495 * performing recovery.
6496 */
6497static int _nfs40_proc_get_locations(struct inode *inode,
6498 struct nfs4_fs_locations *locations,
6499 struct page *page, struct rpc_cred *cred)
6500{
6501 struct nfs_server *server = NFS_SERVER(inode);
6502 struct rpc_clnt *clnt = server->client;
6503 u32 bitmask[2] = {
6504 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6505 };
6506 struct nfs4_fs_locations_arg args = {
6507 .clientid = server->nfs_client->cl_clientid,
6508 .fh = NFS_FH(inode),
6509 .page = page,
6510 .bitmask = bitmask,
6511 .migration = 1, /* skip LOOKUP */
6512 .renew = 1, /* append RENEW */
6513 };
6514 struct nfs4_fs_locations_res res = {
6515 .fs_locations = locations,
6516 .migration = 1,
6517 .renew = 1,
6518 };
6519 struct rpc_message msg = {
6520 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6521 .rpc_argp = &args,
6522 .rpc_resp = &res,
6523 .rpc_cred = cred,
6524 };
6525 unsigned long now = jiffies;
6526 int status;
6527
6528 nfs_fattr_init(&locations->fattr);
6529 locations->server = server;
6530 locations->nlocations = 0;
6531
6532 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6533 nfs4_set_sequence_privileged(&args.seq_args);
6534 status = nfs4_call_sync_sequence(clnt, server, &msg,
6535 &args.seq_args, &res.seq_res);
6536 if (status)
6537 return status;
6538
6539 renew_lease(server, now);
6540 return 0;
6541}
6542
6543#ifdef CONFIG_NFS_V4_1
6544
6545/*
6546 * This operation also signals the server that this client is
6547 * performing migration recovery. The server can stop asserting
6548 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6549 * performing this operation is identified in the SEQUENCE
6550 * operation in this compound.
6551 *
6552 * When the client supports GETATTR(fs_locations_info), it can
6553 * be plumbed in here.
6554 */
6555static int _nfs41_proc_get_locations(struct inode *inode,
6556 struct nfs4_fs_locations *locations,
6557 struct page *page, struct rpc_cred *cred)
6558{
6559 struct nfs_server *server = NFS_SERVER(inode);
6560 struct rpc_clnt *clnt = server->client;
6561 u32 bitmask[2] = {
6562 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6563 };
6564 struct nfs4_fs_locations_arg args = {
6565 .fh = NFS_FH(inode),
6566 .page = page,
6567 .bitmask = bitmask,
6568 .migration = 1, /* skip LOOKUP */
6569 };
6570 struct nfs4_fs_locations_res res = {
6571 .fs_locations = locations,
6572 .migration = 1,
6573 };
6574 struct rpc_message msg = {
6575 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6576 .rpc_argp = &args,
6577 .rpc_resp = &res,
6578 .rpc_cred = cred,
6579 };
6580 int status;
6581
6582 nfs_fattr_init(&locations->fattr);
6583 locations->server = server;
6584 locations->nlocations = 0;
6585
6586 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6587 nfs4_set_sequence_privileged(&args.seq_args);
6588 status = nfs4_call_sync_sequence(clnt, server, &msg,
6589 &args.seq_args, &res.seq_res);
6590 if (status == NFS4_OK &&
6591 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6592 status = -NFS4ERR_LEASE_MOVED;
6593 return status;
6594}
6595
6596#endif /* CONFIG_NFS_V4_1 */
6597
6598/**
6599 * nfs4_proc_get_locations - discover locations for a migrated FSID
6600 * @inode: inode on FSID that is migrating
6601 * @locations: result of query
6602 * @page: buffer
6603 * @cred: credential to use for this operation
6604 *
6605 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6606 * operation failed, or a negative errno if a local error occurred.
6607 *
6608 * On success, "locations" is filled in, but if the server has
6609 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6610 * asserted.
6611 *
6612 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6613 * from this client that require migration recovery.
6614 */
6615int nfs4_proc_get_locations(struct inode *inode,
6616 struct nfs4_fs_locations *locations,
6617 struct page *page, struct rpc_cred *cred)
6618{
6619 struct nfs_server *server = NFS_SERVER(inode);
6620 struct nfs_client *clp = server->nfs_client;
6621 const struct nfs4_mig_recovery_ops *ops =
6622 clp->cl_mvops->mig_recovery_ops;
6623 struct nfs4_exception exception = { };
6624 int status;
6625
6626 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6627 (unsigned long long)server->fsid.major,
6628 (unsigned long long)server->fsid.minor,
6629 clp->cl_hostname);
6630 nfs_display_fhandle(NFS_FH(inode), __func__);
6631
6632 do {
6633 status = ops->get_locations(inode, locations, page, cred);
6634 if (status != -NFS4ERR_DELAY)
6635 break;
6636 nfs4_handle_exception(server, status, &exception);
6637 } while (exception.retry);
6638 return status;
6639}
6640
44c99933
CL		 6641/*
6642 * This operation also signals the server that this client is
6643 * performing "lease moved" recovery. The server can stop
6644 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6645 * is appended to this compound to identify the client ID which is
6646 * performing recovery.
6647 */
6648static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6649{
6650 struct nfs_server *server = NFS_SERVER(inode);
6651 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6652 struct rpc_clnt *clnt = server->client;
6653 struct nfs4_fsid_present_arg args = {
6654 .fh = NFS_FH(inode),
6655 .clientid = clp->cl_clientid,
6656 .renew = 1, /* append RENEW */
6657 };
6658 struct nfs4_fsid_present_res res = {
6659 .renew = 1,
6660 };
6661 struct rpc_message msg = {
6662 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6663 .rpc_argp = &args,
6664 .rpc_resp = &res,
6665 .rpc_cred = cred,
6666 };
6667 unsigned long now = jiffies;
6668 int status;
6669
6670 res.fh = nfs_alloc_fhandle();
6671 if (res.fh == NULL)
6672 return -ENOMEM;
6673
6674 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6675 nfs4_set_sequence_privileged(&args.seq_args);
6676 status = nfs4_call_sync_sequence(clnt, server, &msg,
6677 &args.seq_args, &res.seq_res);
6678 nfs_free_fhandle(res.fh);
6679 if (status)
6680 return status;
6681
6682 do_renew_lease(clp, now);
6683 return 0;
6684}
6685
6686#ifdef CONFIG_NFS_V4_1
6687
6688/*
6689 * This operation also signals the server that this client is
6690 * performing "lease moved" recovery. The server can stop asserting
6691 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6692 * this operation is identified in the SEQUENCE operation in this
6693 * compound.
6694 */
6695static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6696{
6697 struct nfs_server *server = NFS_SERVER(inode);
6698 struct rpc_clnt *clnt = server->client;
6699 struct nfs4_fsid_present_arg args = {
6700 .fh = NFS_FH(inode),
6701 };
6702 struct nfs4_fsid_present_res res = {
6703 };
6704 struct rpc_message msg = {
6705 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6706 .rpc_argp = &args,
6707 .rpc_resp = &res,
6708 .rpc_cred = cred,
6709 };
6710 int status;
6711
6712 res.fh = nfs_alloc_fhandle();
6713 if (res.fh == NULL)
6714 return -ENOMEM;
6715
6716 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6717 nfs4_set_sequence_privileged(&args.seq_args);
6718 status = nfs4_call_sync_sequence(clnt, server, &msg,
6719 &args.seq_args, &res.seq_res);
6720 nfs_free_fhandle(res.fh);
6721 if (status == NFS4_OK &&
6722 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6723 status = -NFS4ERR_LEASE_MOVED;
6724 return status;
6725}
6726
6727#endif /* CONFIG_NFS_V4_1 */
6728
6729/**
6730 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6731 * @inode: inode on FSID to check
6732 * @cred: credential to use for this operation
6733 *
6734 * Server indicates whether the FSID is present, moved, or not
6735 * recognized. This operation is necessary to clear a LEASE_MOVED
6736 * condition for this client ID.
6737 *
6738 * Returns NFS4_OK if the FSID is present on this server,
6739 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6740 * NFS4ERR code if some error occurred on the server, or a
6741 * negative errno if a local failure occurred.
6742 */
6743int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6744{
6745 struct nfs_server *server = NFS_SERVER(inode);
6746 struct nfs_client *clp = server->nfs_client;
6747 const struct nfs4_mig_recovery_ops *ops =
6748 clp->cl_mvops->mig_recovery_ops;
6749 struct nfs4_exception exception = { };
6750 int status;
6751
6752 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6753 (unsigned long long)server->fsid.major,
6754 (unsigned long long)server->fsid.minor,
6755 clp->cl_hostname);
6756 nfs_display_fhandle(NFS_FH(inode), __func__);
6757
6758 do {
6759 status = ops->fsid_present(inode, cred);
6760 if (status != -NFS4ERR_DELAY)
6761 break;
6762 nfs4_handle_exception(server, status, &exception);
6763 } while (exception.retry);
6764 return status;
6765}
6766
5ec16a85 6767/**
a5250def
WAA		 6768 * If 'use_integrity' is true and the state managment nfs_client
6769 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6770 * and the machine credential as per RFC3530bis and RFC5661 Security
6771 * Considerations sections. Otherwise, just use the user cred with the
6772 * filesystem's rpc_client.
5ec16a85 6773 */
a5250def 6774static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6775{
6776 int status;
6777 struct nfs4_secinfo_arg args = {
6778 .dir_fh = NFS_FH(dir),
6779 .name = name,
6780 };
6781 struct nfs4_secinfo_res res = {
6782 .flavors = flavors,
6783 };
6784 struct rpc_message msg = {
6785 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6786 .rpc_argp = &args,
6787 .rpc_resp = &res,
6788 };
a5250def 6789 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6790 struct rpc_cred *cred = NULL;
a5250def
WAA		 6791
6792 if (use_integrity) {
6793 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6794 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6795 msg.rpc_cred = cred;
a5250def 6796 }
5a5ea0d4
BS		 6797
6798 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6799
6800 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6801 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6802
a5250def
WAA		 6803 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6804 &res.seq_res, 0);
5a5ea0d4 6805 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6806
7cb852df
WAA		 6807 if (cred)
6808 put_rpccred(cred);
a5250def 6809
5a5ea0d4
BS		 6810 return status;
6811}
6812
72de53ec
BS		 6813int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6814 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6815{
6816 struct nfs4_exception exception = { };
6817 int err;
6818 do {
a5250def
WAA		 6819 err = -NFS4ERR_WRONGSEC;
6820
6821 /* try to use integrity protection with machine cred */
6822 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6823 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6824
6825 /*
6826 * if unable to use integrity protection, or SECINFO with
6827 * integrity protection returns NFS4ERR_WRONGSEC (which is
6828 * disallowed by spec, but exists in deployed servers) use
6829 * the current filesystem's rpc_client and the user cred.
6830 */
6831 if (err == -NFS4ERR_WRONGSEC)
6832 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6833
078ea3df
TM		 6834 trace_nfs4_secinfo(dir, name, err);
6835 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6836 &exception);
6837 } while (exception.retry);
6838 return err;
6839}
6840
557134a3 6841#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6842/*
6843 * Check the exchange flags returned by the server for invalid flags, having
6844 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6845 * DS flags set.
6846 */
6847static int nfs4_check_cl_exchange_flags(u32 flags)
6848{
6849 if (flags & ~EXCHGID4_FLAG_MASK_R)
6850 goto out_inval;
6851 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6852 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6853 goto out_inval;
6854 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6855 goto out_inval;
6856 return NFS_OK;
6857out_inval:
6858 return -NFS4ERR_INVAL;
6859}
6860
78fe0f41 6861static bool
79d4e1f0
CL		 6862nfs41_same_server_scope(struct nfs41_server_scope *a,
6863 struct nfs41_server_scope *b)
78fe0f41
WAA		 6864{
6865 if (a->server_scope_sz == b->server_scope_sz &&
6866 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6867 return true;
6868
6869 return false;
6870}
6871
02a95dee
AA		 6872static void
6873nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
6874{
6875}
6876
6877static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
6878 .rpc_call_done = &nfs4_bind_one_conn_to_session_done,
6879};
6880
7c44f1ae 6881/*
d9ddbf5d 6882 * nfs4_proc_bind_one_conn_to_session()
7c44f1ae
WAA		 6883 *
6884 * The 4.1 client currently uses the same TCP connection for the
6885 * fore and backchannel.
6886 */
d9ddbf5d
TM		 6887static
6888int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
6889 struct rpc_xprt *xprt,
6890 struct nfs_client *clp,
6891 struct rpc_cred *cred)
7c44f1ae
WAA		 6892{
6893 int status;
71a097c6
TM		 6894 struct nfs41_bind_conn_to_session_args args = {
6895 .client = clp,
6896 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6897 };
7c44f1ae
WAA		 6898 struct nfs41_bind_conn_to_session_res res;
6899 struct rpc_message msg = {
6900 .rpc_proc =
6901 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 6902 .rpc_argp = &args,
7c44f1ae 6903 .rpc_resp = &res,
2cf047c9 6904 .rpc_cred = cred,
7c44f1ae 6905 };
d9ddbf5d
TM		 6906 struct rpc_task_setup task_setup_data = {
6907 .rpc_client = clnt,
6908 .rpc_xprt = xprt,
02a95dee 6909 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
d9ddbf5d
TM		 6910 .rpc_message = &msg,
6911 .flags = RPC_TASK_TIMEOUT,
6912 };
6913 struct rpc_task *task;
7c44f1ae
WAA		 6914
6915 dprintk("--> %s\n", __func__);
7c44f1ae 6916
71a097c6
TM		 6917 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6918 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6919 args.dir = NFS4_CDFC4_FORE;
7c44f1ae 6920
d9ddbf5d
TM		 6921 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
6922 if (xprt != rcu_access_pointer(clnt->cl_xprt))
6923 args.dir = NFS4_CDFC4_FORE;
6924
6925 task = rpc_run_task(&task_setup_data);
6926 if (!IS_ERR(task)) {
6927 status = task->tk_status;
6928 rpc_put_task(task);
6929 } else
6930 status = PTR_ERR(task);
c6d01c6f 6931 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 6932 if (status == 0) {
71a097c6 6933 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 6934 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6935 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6936 status = -EIO;
71a097c6 6937 goto out;
7c44f1ae 6938 }
71a097c6 6939 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 6940 dprintk("NFS: %s: Unexpected direction from server\n",
6941 __func__);
6942 status = -EIO;
71a097c6 6943 goto out;
7c44f1ae 6944 }
71a097c6 6945 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 6946 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6947 __func__);
6948 status = -EIO;
71a097c6 6949 goto out;
7c44f1ae
WAA		 6950 }
6951 }
7c44f1ae
WAA		 6952out:
6953 dprintk("<-- %s status= %d\n", __func__, status);
6954 return status;
6955}
6956
d9ddbf5d
TM		 6957struct rpc_bind_conn_calldata {
6958 struct nfs_client *clp;
6959 struct rpc_cred *cred;
6960};
6961
6962static int
6963nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
6964 struct rpc_xprt *xprt,
6965 void *calldata)
6966{
6967 struct rpc_bind_conn_calldata *p = calldata;
6968
6969 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
6970}
6971
6972int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
6973{
6974 struct rpc_bind_conn_calldata data = {
6975 .clp = clp,
6976 .cred = cred,
6977 };
6978 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
6979 nfs4_proc_bind_conn_to_session_callback, &data);
6980}
6981
99fe60d0 6982/*
fa940720
WAA		 6983 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6984 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6985 */
6986static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6987 .how = SP4_MACH_CRED,
6988 .enforce.u.words = {
6989 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6990 1 << (OP_EXCHANGE_ID - 32) |
6991 1 << (OP_CREATE_SESSION - 32) |
6992 1 << (OP_DESTROY_SESSION - 32) |
6993 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6994 },
6995 .allow.u.words = {
6996 [0] = 1 << (OP_CLOSE) |
99ade3c7 6997 1 << (OP_OPEN_DOWNGRADE) |
a0279625 6998 1 << (OP_LOCKU) |
99ade3c7 6999 1 << (OP_DELEGRETURN) |
a0279625 7000 1 << (OP_COMMIT),
8b5bee2e 7001 [1] = 1 << (OP_SECINFO - 32) |
3787d506 7002 1 << (OP_SECINFO_NO_NAME - 32) |
99ade3c7 7003 1 << (OP_LAYOUTRETURN - 32) |
3787d506 7004 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 7005 1 << (OP_FREE_STATEID - 32) |
7006 1 << (OP_WRITE - 32)
2031cd1a
WAA		 7007 }
7008};
7009
7010/*
7011 * Select the state protection mode for client `clp' given the server results
7012 * from exchange_id in `sp'.
99fe60d0 7013 *
2031cd1a
WAA		 7014 * Returns 0 on success, negative errno otherwise.
7015 */
7016static int nfs4_sp4_select_mode(struct nfs_client *clp,
7017 struct nfs41_state_protection *sp)
7018{
7019 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
7020 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
7021 1 << (OP_EXCHANGE_ID - 32) |
7022 1 << (OP_CREATE_SESSION - 32) |
7023 1 << (OP_DESTROY_SESSION - 32) |
7024 1 << (OP_DESTROY_CLIENTID - 32)
7025 };
7026 unsigned int i;
7027
7028 if (sp->how == SP4_MACH_CRED) {
7029 /* Print state protect result */
7030 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
7031 for (i = 0; i <= LAST_NFS4_OP; i++) {
7032 if (test_bit(i, sp->enforce.u.longs))
7033 dfprintk(MOUNT, " enforce op %d\n", i);
7034 if (test_bit(i, sp->allow.u.longs))
7035 dfprintk(MOUNT, " allow op %d\n", i);
7036 }
7037
7038 /* make sure nothing is on enforce list that isn't supported */
7039 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
7040 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
7041 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7042 return -EINVAL;
7043 }
7044 }
7045
7046 /*
7047 * Minimal mode - state operations are allowed to use machine
7048 * credential. Note this already happens by default, so the
7049 * client doesn't have to do anything more than the negotiation.
7050 *
7051 * NOTE: we don't care if EXCHANGE_ID is in the list -
7052 * we're already using the machine cred for exchange_id
7053 * and will never use a different cred.
7054 */
7055 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
7056 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
7057 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
7058 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
7059 dfprintk(MOUNT, "sp4_mach_cred:\n");
7060 dfprintk(MOUNT, " minimal mode enabled\n");
7061 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
7062 } else {
7063 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7064 return -EINVAL;
7065 }
fa940720
WAA		 7066
7067 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
99ade3c7
AE		 7068 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
7069 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
fa940720
WAA		 7070 test_bit(OP_LOCKU, sp->allow.u.longs)) {
7071 dfprintk(MOUNT, " cleanup mode enabled\n");
7072 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
7073 }
8b5bee2e 7074
99ade3c7
AE		 7075 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
7076 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
7077 set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP,
7078 &clp->cl_sp4_flags);
7079 }
7080
8b5bee2e
WAA		 7081 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
7082 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
7083 dfprintk(MOUNT, " secinfo mode enabled\n");
7084 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
7085 }
3787d506
WAA		 7086
7087 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
7088 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
7089 dfprintk(MOUNT, " stateid mode enabled\n");
7090 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
7091 }
8c21c62c
WAA		 7092
7093 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
7094 dfprintk(MOUNT, " write mode enabled\n");
7095 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
7096 }
7097
7098 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
7099 dfprintk(MOUNT, " commit mode enabled\n");
7100 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
7101 }
2031cd1a
WAA		 7102 }
7103
7104 return 0;
7105}
7106
7107/*
7108 * _nfs4_proc_exchange_id()
6bbb4ae8 7109 *
2031cd1a 7110 * Wrapper for EXCHANGE_ID operation.
99fe60d0 7111 */
2031cd1a
WAA		 7112static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
7113 u32 sp4_how)
99fe60d0
BH		 7114{
7115 nfs4_verifier verifier;
7116 struct nfs41_exchange_id_args args = {
cd93710e 7117 .verifier = &verifier,
99fe60d0 7118 .client = clp,
cd3fadec 7119#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 7120 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 7121 EXCHGID4_FLAG_BIND_PRINC_STATEID |
7122 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
7123#else
7124 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7125 EXCHGID4_FLAG_BIND_PRINC_STATEID,
7126#endif
99fe60d0
BH		 7127 };
7128 struct nfs41_exchange_id_res res = {
32b01310 7129 0
99fe60d0
BH		 7130 };
7131 int status;
7132 struct rpc_message msg = {
7133 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
7134 .rpc_argp = &args,
7135 .rpc_resp = &res,
7136 .rpc_cred = cred,
7137 };
99fe60d0 7138
f092075d 7139 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 7140
7141 status = nfs4_init_uniform_client_string(clp);
7142 if (status)
3a6bb738 7143 goto out;
3a6bb738
JL		 7144
7145 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6bbb4ae8 7146 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 7147 clp->cl_owner_id);
99fe60d0 7148
acdeb69d 7149 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 7150 GFP_NOFS);
acdeb69d 7151 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 7152 status = -ENOMEM;
7153 goto out;
7154 }
78fe0f41 7155
79d4e1f0 7156 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 7157 GFP_NOFS);
177313f1 7158 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 7159 status = -ENOMEM;
acdeb69d 7160 goto out_server_owner;
abe9a6d5 7161 }
78fe0f41 7162
bbafffd2 7163 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 7164 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 7165 status = -ENOMEM;
7166 goto out_server_scope;
7167 }
7168
2031cd1a
WAA		 7169 switch (sp4_how) {
7170 case SP4_NONE:
7171 args.state_protect.how = SP4_NONE;
7172 break;
7173
7174 case SP4_MACH_CRED:
7175 args.state_protect = nfs4_sp4_mach_cred_request;
7176 break;
7177
7178 default:
7179 /* unsupported! */
7180 WARN_ON_ONCE(1);
7181 status = -EINVAL;
6b55970b 7182 goto out_impl_id;
2031cd1a
WAA		 7183 }
7184
1bd714f2 7185 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7186 trace_nfs4_exchange_id(clp, status);
177313f1 7187 if (status == 0)
32b01310 7188 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 7189
2031cd1a
WAA		 7190 if (status == 0)
7191 status = nfs4_sp4_select_mode(clp, &res.state_protect);
7192
acdeb69d 7193 if (status == 0) {
32b01310 7194 clp->cl_clientid = res.clientid;
e11259f9
TM		 7195 clp->cl_exchange_flags = res.flags;
7196 /* Client ID is not confirmed */
7197 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7198 clear_bit(NFS4_SESSION_ESTABLISHED,
7199 &clp->cl_session->session_state);
32b01310 7200 clp->cl_seqid = res.seqid;
e11259f9 7201 }
32b01310 7202
acdeb69d
CL		 7203 kfree(clp->cl_serverowner);
7204 clp->cl_serverowner = res.server_owner;
7205 res.server_owner = NULL;
78fe0f41 7206
7d2ed9ac 7207 /* use the most recent implementation id */
59155546
CL		 7208 kfree(clp->cl_implid);
7209 clp->cl_implid = res.impl_id;
6b55970b 7210 res.impl_id = NULL;
7d2ed9ac 7211
177313f1 7212 if (clp->cl_serverscope != NULL &&
79d4e1f0 7213 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 7214 res.server_scope)) {
7215 dprintk("%s: server_scope mismatch detected\n",
7216 __func__);
7217 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 7218 kfree(clp->cl_serverscope);
7219 clp->cl_serverscope = NULL;
78fe0f41
WAA		 7220 }
7221
177313f1 7222 if (clp->cl_serverscope == NULL) {
79d4e1f0 7223 clp->cl_serverscope = res.server_scope;
6b55970b 7224 res.server_scope = NULL;
abe9a6d5 7225 }
6b55970b 7226 }
7d2ed9ac 7227
6b55970b
KM		 7228out_impl_id:
7229 kfree(res.impl_id);
7d2ed9ac 7230out_server_scope:
abe9a6d5 7231 kfree(res.server_scope);
6b55970b
KM		 7232out_server_owner:
7233 kfree(res.server_owner);
abe9a6d5 7234out:
177313f1 7235 if (clp->cl_implid != NULL)
6bbb4ae8 7236 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 7237 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 7238 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 7239 clp->cl_implid->date.seconds,
7240 clp->cl_implid->date.nseconds);
6bbb4ae8 7241 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 7242 return status;
7243}
7244
2031cd1a
WAA		 7245/*
7246 * nfs4_proc_exchange_id()
7247 *
7248 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7249 *
7250 * Since the clientid has expired, all compounds using sessions
7251 * associated with the stale clientid will be returning
7252 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7253 * be in some phase of session reset.
7254 *
7255 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7256 */
7257int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7258{
7259 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7260 int status;
7261
7262 /* try SP4_MACH_CRED if krb5i/p */
7263 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7264 authflavor == RPC_AUTH_GSS_KRB5P) {
7265 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
7266 if (!status)
7267 return 0;
7268 }
7269
7270 /* try SP4_NONE */
7271 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
7272}
7273
66245539
TM		 7274static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7275 struct rpc_cred *cred)
7276{
7277 struct rpc_message msg = {
7278 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7279 .rpc_argp = clp,
7280 .rpc_cred = cred,
7281 };
7282 int status;
7283
7284 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7285 trace_nfs4_destroy_clientid(clp, status);
66245539 7286 if (status)
02c67525 7287 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7288 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7289 return status;
7290}
7291
7292static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7293 struct rpc_cred *cred)
7294{
7295 unsigned int loop;
7296 int ret;
7297
7298 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7299 ret = _nfs4_proc_destroy_clientid(clp, cred);
7300 switch (ret) {
7301 case -NFS4ERR_DELAY:
7302 case -NFS4ERR_CLIENTID_BUSY:
7303 ssleep(1);
7304 break;
7305 default:
7306 return ret;
7307 }
7308 }
7309 return 0;
7310}
7311
7312int nfs4_destroy_clientid(struct nfs_client *clp)
7313{
7314 struct rpc_cred *cred;
7315 int ret = 0;
7316
7317 if (clp->cl_mvops->minor_version < 1)
7318 goto out;
7319 if (clp->cl_exchange_flags == 0)
7320 goto out;
05f4c350
CL		 7321 if (clp->cl_preserve_clid)
7322 goto out;
73d8bde5 7323 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7324 ret = nfs4_proc_destroy_clientid(clp, cred);
7325 if (cred)
7326 put_rpccred(cred);
7327 switch (ret) {
7328 case 0:
7329 case -NFS4ERR_STALE_CLIENTID:
7330 clp->cl_exchange_flags = 0;
7331 }
7332out:
7333 return ret;
7334}
7335
2050f0cc
AA		 7336struct nfs4_get_lease_time_data {
7337 struct nfs4_get_lease_time_args *args;
7338 struct nfs4_get_lease_time_res *res;
7339 struct nfs_client *clp;
7340};
7341
7342static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7343 void *calldata)
7344{
2050f0cc
AA		 7345 struct nfs4_get_lease_time_data *data =
7346 (struct nfs4_get_lease_time_data *)calldata;
7347
7348 dprintk("--> %s\n", __func__);
7349 /* just setup sequence, do not trigger session recovery
7350 since we're invoked within one */
d9afbd1b
TM		 7351 nfs41_setup_sequence(data->clp->cl_session,
7352 &data->args->la_seq_args,
7353 &data->res->lr_seq_res,
7354 task);
2050f0cc
AA		 7355 dprintk("<-- %s\n", __func__);
7356}
7357
7358/*
7359 * Called from nfs4_state_manager thread for session setup, so don't recover
7360 * from sequence operation or clientid errors.
7361 */
7362static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7363{
7364 struct nfs4_get_lease_time_data *data =
7365 (struct nfs4_get_lease_time_data *)calldata;
7366
7367 dprintk("--> %s\n", __func__);
14516c3a
TM		 7368 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7369 return;
2050f0cc
AA		 7370 switch (task->tk_status) {
7371 case -NFS4ERR_DELAY:
7372 case -NFS4ERR_GRACE:
7373 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7374 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7375 task->tk_status = 0;
a8a4ae3a
AA		 7376 /* fall through */
7377 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7378 rpc_restart_call_prepare(task);
2050f0cc
AA		 7379 return;
7380 }
2050f0cc
AA		 7381 dprintk("<-- %s\n", __func__);
7382}
7383
17280175 7384static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7385 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7386 .rpc_call_done = nfs4_get_lease_time_done,
7387};
7388
7389int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7390{
7391 struct rpc_task *task;
7392 struct nfs4_get_lease_time_args args;
7393 struct nfs4_get_lease_time_res res = {
7394 .lr_fsinfo = fsinfo,
7395 };
7396 struct nfs4_get_lease_time_data data = {
7397 .args = &args,
7398 .res = &res,
7399 .clp = clp,
7400 };
7401 struct rpc_message msg = {
7402 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7403 .rpc_argp = &args,
7404 .rpc_resp = &res,
7405 };
7406 struct rpc_task_setup task_setup = {
7407 .rpc_client = clp->cl_rpcclient,
7408 .rpc_message = &msg,
7409 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7410 .callback_data = &data,
7411 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7412 };
7413 int status;
7414
a9c92d6b 7415 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7416 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7417 dprintk("--> %s\n", __func__);
7418 task = rpc_run_task(&task_setup);
7419
7420 if (IS_ERR(task))
7421 status = PTR_ERR(task);
7422 else {
7423 status = task->tk_status;
7424 rpc_put_task(task);
7425 }
7426 dprintk("<-- %s return %d\n", __func__, status);
7427
7428 return status;
7429}
7430
fc931582
AA		 7431/*
7432 * Initialize the values to be used by the client in CREATE_SESSION
7433 * If nfs4_init_session set the fore channel request and response sizes,
7434 * use them.
7435 *
7436 * Set the back channel max_resp_sz_cached to zero to force the client to
7437 * always set csa_cachethis to FALSE because the current implementation
7438 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7439 */
6b26cc8c
CL		 7440static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
7441 struct rpc_clnt *clnt)
fc931582 7442{
18aad3d5 7443 unsigned int max_rqst_sz, max_resp_sz;
6b26cc8c 7444 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
18aad3d5
AA		 7445
7446 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7447 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7448
fc931582 7449 /* Fore channel attributes */
18aad3d5
AA		 7450 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7451 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7452 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7453 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7454
7455 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7456 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7457 __func__,
7458 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7459 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7460
7461 /* Back channel attributes */
6b26cc8c
CL		 7462 args->bc_attrs.max_rqst_sz = max_bc_payload;
7463 args->bc_attrs.max_resp_sz = max_bc_payload;
fc931582
AA		 7464 args->bc_attrs.max_resp_sz_cached = 0;
7465 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
f4f58ed1 7466 args->bc_attrs.max_reqs = NFS41_BC_MAX_CALLBACKS;
fc931582
AA		 7467
7468 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7469 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7470 __func__,
7471 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7472 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7473 args->bc_attrs.max_reqs);
7474}
7475
79969dd1
TM		 7476static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7477 struct nfs41_create_session_res *res)
8d35301d 7478{
43c2e885 7479 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7480 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7481
43c2e885
BF		 7482 if (rcvd->max_resp_sz > sent->max_resp_sz)
7483 return -EINVAL;
7484 /*
7485 * Our requested max_ops is the minimum we need; we're not
7486 * prepared to break up compounds into smaller pieces than that.
7487 * So, no point even trying to continue if the server won't
7488 * cooperate:
7489 */
7490 if (rcvd->max_ops < sent->max_ops)
7491 return -EINVAL;
7492 if (rcvd->max_reqs == 0)
7493 return -EINVAL;
b4b9a0c1
VG		 7494 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7495 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7496 return 0;
8d35301d
AA		 7497}
7498
79969dd1
TM		 7499static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7500 struct nfs41_create_session_res *res)
43c2e885
BF		 7501{
7502 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7503 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7504
b1c0df5f
TM		 7505 if (!(res->flags & SESSION4_BACK_CHAN))
7506 goto out;
43c2e885
BF		 7507 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7508 return -EINVAL;
7509 if (rcvd->max_resp_sz < sent->max_resp_sz)
7510 return -EINVAL;
7511 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7512 return -EINVAL;
7513 /* These would render the backchannel useless: */
b4b9a0c1 7514 if (rcvd->max_ops != sent->max_ops)
43c2e885 7515 return -EINVAL;
b4b9a0c1 7516 if (rcvd->max_reqs != sent->max_reqs)
43c2e885 7517 return -EINVAL;
b1c0df5f 7518out:
43c2e885
BF		 7519 return 0;
7520}
8d35301d 7521
8d35301d 7522static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7523 struct nfs41_create_session_res *res)
8d35301d 7524{
43c2e885 7525 int ret;
8d35301d 7526
79969dd1 7527 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7528 if (ret)
7529 return ret;
79969dd1
TM		 7530 return nfs4_verify_back_channel_attrs(args, res);
7531}
7532
7533static void nfs4_update_session(struct nfs4_session *session,
7534 struct nfs41_create_session_res *res)
7535{
7536 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7537 /* Mark client id and session as being confirmed */
7538 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7539 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7540 session->flags = res->flags;
7541 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7542 if (res->flags & SESSION4_BACK_CHAN)
7543 memcpy(&session->bc_attrs, &res->bc_attrs,
7544 sizeof(session->bc_attrs));
8d35301d
AA		 7545}
7546
848f5bda
TM		 7547static int _nfs4_proc_create_session(struct nfs_client *clp,
7548 struct rpc_cred *cred)
fc931582
AA		 7549{
7550 struct nfs4_session *session = clp->cl_session;
7551 struct nfs41_create_session_args args = {
7552 .client = clp,
79969dd1
TM		 7553 .clientid = clp->cl_clientid,
7554 .seqid = clp->cl_seqid,
fc931582
AA		 7555 .cb_program = NFS4_CALLBACK,
7556 };
79969dd1
TM		 7557 struct nfs41_create_session_res res;
7558
fc931582
AA		 7559 struct rpc_message msg = {
7560 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7561 .rpc_argp = &args,
7562 .rpc_resp = &res,
848f5bda 7563 .rpc_cred = cred,
fc931582
AA		 7564 };
7565 int status;
7566
6b26cc8c 7567 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
0f91421e 7568 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7569
1bd714f2 7570 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7571 trace_nfs4_create_session(clp, status);
fc931582 7572
b519d408
TM		 7573 switch (status) {
7574 case -NFS4ERR_STALE_CLIENTID:
7575 case -NFS4ERR_DELAY:
7576 case -ETIMEDOUT:
7577 case -EACCES:
7578 case -EAGAIN:
7579 goto out;
7580 };
7581
7582 clp->cl_seqid++;
43095d39 7583 if (!status) {
8d35301d 7584 /* Verify the session's negotiated channel_attrs values */
79969dd1 7585 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7586 /* Increment the clientid slot sequence id */
79969dd1
TM		 7587 if (status)
7588 goto out;
7589 nfs4_update_session(session, &res);
fc931582 7590 }
79969dd1 7591out:
fc931582
AA		 7592 return status;
7593}
7594
7595/*
7596 * Issues a CREATE_SESSION operation to the server.
7597 * It is the responsibility of the caller to verify the session is
7598 * expired before calling this routine.
7599 */
848f5bda 7600int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7601{
7602 int status;
7603 unsigned *ptr;
fc931582
AA		 7604 struct nfs4_session *session = clp->cl_session;
7605
7606 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7607
848f5bda 7608 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7609 if (status)
7610 goto out;
7611
aacd5537
AA		 7612 /* Init or reset the session slot tables */
7613 status = nfs4_setup_session_slot_tables(session);
7614 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7615 if (status)
7616 goto out;
7617
7618 ptr = (unsigned *)&session->sess_id.data[0];
7619 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7620 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7621out:
7622 dprintk("<-- %s\n", __func__);
7623 return status;
7624}
7625
0f3e66c6
AA		 7626/*
7627 * Issue the over-the-wire RPC DESTROY_SESSION.
7628 * The caller must serialize access to this routine.
7629 */
848f5bda
TM		 7630int nfs4_proc_destroy_session(struct nfs4_session *session,
7631 struct rpc_cred *cred)
0f3e66c6 7632{
848f5bda
TM		 7633 struct rpc_message msg = {
7634 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7635 .rpc_argp = session,
7636 .rpc_cred = cred,
7637 };
0f3e66c6 7638 int status = 0;
0f3e66c6
AA		 7639
7640 dprintk("--> nfs4_proc_destroy_session\n");
7641
7642 /* session is still being setup */
e11259f9
TM		 7643 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7644 return 0;
0f3e66c6 7645
1bd714f2 7646 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7647 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7648
7649 if (status)
08106ac7 7650 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7651 "Session has been destroyed regardless...\n", status);
7652
7653 dprintk("<-- nfs4_proc_destroy_session\n");
7654 return status;
7655}
7656
fc01cea9
AA		 7657/*
7658 * Renew the cl_session lease.
7659 */
d5f8d3fe
TM		 7660struct nfs4_sequence_data {
7661 struct nfs_client *clp;
7662 struct nfs4_sequence_args args;
7663 struct nfs4_sequence_res res;
7664};
7665
dc96aef9
AB		 7666static void nfs41_sequence_release(void *data)
7667{
d5f8d3fe
TM		 7668 struct nfs4_sequence_data *calldata = data;
7669 struct nfs_client *clp = calldata->clp;
dc96aef9 7670
7135840f
AB		 7671 if (atomic_read(&clp->cl_count) > 1)
7672 nfs4_schedule_state_renewal(clp);
7673 nfs_put_client(clp);
d5f8d3fe 7674 kfree(calldata);
dc96aef9
AB		 7675}
7676
aa5190d0
TM		 7677static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7678{
7679 switch(task->tk_status) {
7680 case -NFS4ERR_DELAY:
aa5190d0
TM		 7681 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7682 return -EAGAIN;
7683 default:
0400a6b0 7684 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7685 }
7686 return 0;
7687}
7688
dc96aef9 7689static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7690{
d5f8d3fe
TM		 7691 struct nfs4_sequence_data *calldata = data;
7692 struct nfs_client *clp = calldata->clp;
fc01cea9 7693
14516c3a
TM		 7694 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7695 return;
fc01cea9 7696
c6d01c6f 7697 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7698 if (task->tk_status < 0) {
7699 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7700 if (atomic_read(&clp->cl_count) == 1)
7701 goto out;
fc01cea9 7702
aa5190d0
TM		 7703 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7704 rpc_restart_call_prepare(task);
fc01cea9
AA		 7705 return;
7706 }
7707 }
fc01cea9 7708 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7709out:
fc01cea9
AA		 7710 dprintk("<-- %s\n", __func__);
7711}
7712
7713static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7714{
d5f8d3fe
TM		 7715 struct nfs4_sequence_data *calldata = data;
7716 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7717 struct nfs4_sequence_args *args;
7718 struct nfs4_sequence_res *res;
7719
fc01cea9
AA		 7720 args = task->tk_msg.rpc_argp;
7721 res = task->tk_msg.rpc_resp;
7722
d9afbd1b 7723 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7724}
7725
7726static const struct rpc_call_ops nfs41_sequence_ops = {
7727 .rpc_call_done = nfs41_sequence_call_done,
7728 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7729 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7730};
7731
8fe72bac
TM		 7732static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7733 struct rpc_cred *cred,
7734 bool is_privileged)
fc01cea9 7735{
d5f8d3fe 7736 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7737 struct rpc_message msg = {
7738 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7739 .rpc_cred = cred,
7740 };
71ac6da9
TM		 7741 struct rpc_task_setup task_setup_data = {
7742 .rpc_client = clp->cl_rpcclient,
7743 .rpc_message = &msg,
8fe72bac 7744 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7745 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7746 };
fc01cea9 7747
7135840f 7748 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7749 return ERR_PTR(-EIO);
dfb4f309 7750 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7751 if (calldata == NULL) {
7135840f 7752 nfs_put_client(clp);
71ac6da9 7753 return ERR_PTR(-ENOMEM);
fc01cea9 7754 }
a9c92d6b 7755 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7756 if (is_privileged)
7757 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7758 msg.rpc_argp = &calldata->args;
7759 msg.rpc_resp = &calldata->res;
7760 calldata->clp = clp;
71ac6da9 7761 task_setup_data.callback_data = calldata;
fc01cea9 7762
71ac6da9
TM		 7763 return rpc_run_task(&task_setup_data);
7764}
7765
2f60ea6b 7766static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7767{
7768 struct rpc_task *task;
7769 int ret = 0;
7770
2f60ea6b 7771 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7772 return -EAGAIN;
8fe72bac 7773 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7774 if (IS_ERR(task))
7775 ret = PTR_ERR(task);
7776 else
bf294b41 7777 rpc_put_task_async(task);
71ac6da9
TM		 7778 dprintk("<-- %s status=%d\n", __func__, ret);
7779 return ret;
7780}
7781
7782static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7783{
7784 struct rpc_task *task;
7785 int ret;
7786
8fe72bac 7787 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7788 if (IS_ERR(task)) {
7789 ret = PTR_ERR(task);
7790 goto out;
7791 }
7792 ret = rpc_wait_for_completion_task(task);
be824167 7793 if (!ret)
71ac6da9
TM		 7794 ret = task->tk_status;
7795 rpc_put_task(task);
7796out:
7797 dprintk("<-- %s status=%d\n", __func__, ret);
7798 return ret;
fc01cea9
AA		 7799}
7800
fce5c838
RL		 7801struct nfs4_reclaim_complete_data {
7802 struct nfs_client *clp;
7803 struct nfs41_reclaim_complete_args arg;
7804 struct nfs41_reclaim_complete_res res;
7805};
7806
7807static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7808{
7809 struct nfs4_reclaim_complete_data *calldata = data;
7810
d9afbd1b
TM		 7811 nfs41_setup_sequence(calldata->clp->cl_session,
7812 &calldata->arg.seq_args,
7813 &calldata->res.seq_res,
7814 task);
fce5c838
RL		 7815}
7816
aa5190d0
TM		 7817static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7818{
7819 switch(task->tk_status) {
7820 case 0:
7821 case -NFS4ERR_COMPLETE_ALREADY:
7822 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7823 break;
7824 case -NFS4ERR_DELAY:
aa5190d0 7825 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7826 /* fall through */
7827 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7828 return -EAGAIN;
7829 default:
0400a6b0 7830 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7831 }
7832 return 0;
7833}
7834
fce5c838
RL		 7835static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7836{
7837 struct nfs4_reclaim_complete_data *calldata = data;
7838 struct nfs_client *clp = calldata->clp;
7839 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7840
7841 dprintk("--> %s\n", __func__);
14516c3a
TM		 7842 if (!nfs41_sequence_done(task, res))
7843 return;
fce5c838 7844
c6d01c6f 7845 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7846 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7847 rpc_restart_call_prepare(task);
7848 return;
7849 }
fce5c838
RL		 7850 dprintk("<-- %s\n", __func__);
7851}
7852
7853static void nfs4_free_reclaim_complete_data(void *data)
7854{
7855 struct nfs4_reclaim_complete_data *calldata = data;
7856
7857 kfree(calldata);
7858}
7859
7860static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7861 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7862 .rpc_call_done = nfs4_reclaim_complete_done,
7863 .rpc_release = nfs4_free_reclaim_complete_data,
7864};
7865
7866/*
7867 * Issue a global reclaim complete.
7868 */
965e9c23
TM		 7869static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7870 struct rpc_cred *cred)
fce5c838
RL		 7871{
7872 struct nfs4_reclaim_complete_data *calldata;
7873 struct rpc_task *task;
7874 struct rpc_message msg = {
7875 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7876 .rpc_cred = cred,
fce5c838
RL		 7877 };
7878 struct rpc_task_setup task_setup_data = {
7879 .rpc_client = clp->cl_rpcclient,
7880 .rpc_message = &msg,
7881 .callback_ops = &nfs4_reclaim_complete_call_ops,
7882 .flags = RPC_TASK_ASYNC,
7883 };
7884 int status = -ENOMEM;
7885
7886 dprintk("--> %s\n", __func__);
8535b2be 7887 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7888 if (calldata == NULL)
7889 goto out;
7890 calldata->clp = clp;
7891 calldata->arg.one_fs = 0;
fce5c838 7892
a9c92d6b 7893 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7894 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7895 msg.rpc_argp = &calldata->arg;
7896 msg.rpc_resp = &calldata->res;
7897 task_setup_data.callback_data = calldata;
7898 task = rpc_run_task(&task_setup_data);
acf82b85 7899 if (IS_ERR(task)) {
fce5c838 7900 status = PTR_ERR(task);
acf82b85
DC		 7901 goto out;
7902 }
c34c32ea
AA		 7903 status = nfs4_wait_for_completion_rpc_task(task);
7904 if (status == 0)
7905 status = task->tk_status;
fce5c838 7906 rpc_put_task(task);
acf82b85 7907 return 0;
fce5c838
RL		 7908out:
7909 dprintk("<-- %s status=%d\n", __func__, status);
7910 return status;
7911}
b1f69b75
AA		 7912
7913static void
7914nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7915{
7916 struct nfs4_layoutget *lgp = calldata;
c31663d4 7917 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7918 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7919
7920 dprintk("--> %s\n", __func__);
183d9e7b
JL		 7921 nfs41_setup_sequence(session, &lgp->args.seq_args,
7922 &lgp->res.seq_res, task);
7923 dprintk("<-- %s\n", __func__);
b1f69b75
AA		 7924}
7925
7926static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7927{
7928 struct nfs4_layoutget *lgp = calldata;
183d9e7b
JL		 7929
7930 dprintk("--> %s\n", __func__);
2e80dbe7 7931 nfs41_sequence_process(task, &lgp->res.seq_res);
183d9e7b
JL		 7932 dprintk("<-- %s\n", __func__);
7933}
7934
7935static int
7936nfs4_layoutget_handle_exception(struct rpc_task *task,
7937 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
7938{
ee314c2a
TM		 7939 struct inode *inode = lgp->args.inode;
7940 struct nfs_server *server = NFS_SERVER(inode);
7941 struct pnfs_layout_hdr *lo;
e85d7ee4
TM		 7942 int nfs4err = task->tk_status;
7943 int err, status = 0;
f7db0b28 7944 LIST_HEAD(head);
b1f69b75 7945
ed7e5423 7946 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7947
e85d7ee4 7948 switch (nfs4err) {
b1f69b75 7949 case 0:
ee314c2a 7950 goto out;
7c1e6e58
PT		 7951
7952 /*
7953 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
7954 * on the file. set tk_status to -ENODATA to tell upper layer to
7955 * retry go inband.
7956 */
7957 case -NFS4ERR_LAYOUTUNAVAILABLE:
183d9e7b 7958 status = -ENODATA;
7c1e6e58 7959 goto out;
21b874c8
TM		 7960 /*
7961 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
7962 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
7963 */
7964 case -NFS4ERR_BADLAYOUT:
183d9e7b
JL		 7965 status = -EOVERFLOW;
7966 goto out;
ed7e5423
BH		 7967 /*
7968 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
21b874c8
TM		 7969 * (or clients) writing to the same RAID stripe except when
7970 * the minlength argument is 0 (see RFC5661 section 18.43.3).
183d9e7b
JL		 7971 *
7972 * Treat it like we would RECALLCONFLICT -- we retry for a little
7973 * while, and then eventually give up.
ed7e5423 7974 */
b1f69b75 7975 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b
JL		 7976 if (lgp->args.minlength == 0) {
7977 status = -EOVERFLOW;
7978 goto out;
ed7e5423 7979 }
e85d7ee4
TM		 7980 status = -EBUSY;
7981 break;
183d9e7b 7982 case -NFS4ERR_RECALLCONFLICT:
183d9e7b 7983 status = -ERECALLCONFLICT;
e85d7ee4 7984 break;
ee314c2a
TM		 7985 case -NFS4ERR_EXPIRED:
7986 case -NFS4ERR_BAD_STATEID:
183d9e7b 7987 exception->timeout = 0;
ee314c2a 7988 spin_lock(&inode->i_lock);
f7db0b28
TM		 7989 lo = NFS_I(inode)->layout;
7990 /* If the open stateid was bad, then recover it. */
7991 if (!lo || test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) ||
7992 nfs4_stateid_match_other(&lgp->args.stateid,
2259f960 7993 &lgp->args.ctx->state->stateid)) {
ee314c2a 7994 spin_unlock(&inode->i_lock);
183d9e7b 7995 exception->state = lgp->args.ctx->state;
2259f960
TM		 7996 break;
7997 }
f7db0b28
TM		 7998
7999 /*
8000 * Mark the bad layout state as invalid, then retry
8001 */
668f455d 8002 pnfs_mark_layout_stateid_invalid(lo, &head);
f7db0b28
TM		 8003 spin_unlock(&inode->i_lock);
8004 pnfs_free_lseg_list(&head);
8005 status = -EAGAIN;
8006 goto out;
b1f69b75 8007 }
183d9e7b 8008
e85d7ee4
TM		 8009 err = nfs4_handle_exception(server, nfs4err, exception);
8010 if (!status) {
8011 if (exception->retry)
8012 status = -EAGAIN;
8013 else
8014 status = err;
8015 }
ee314c2a 8016out:
b1f69b75 8017 dprintk("<-- %s\n", __func__);
183d9e7b 8018 return status;
b1f69b75
AA		 8019}
8020
8554116e
IK		 8021static size_t max_response_pages(struct nfs_server *server)
8022{
8023 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
8024 return nfs_page_array_len(0, max_resp_sz);
8025}
8026
8027static void nfs4_free_pages(struct page **pages, size_t size)
8028{
8029 int i;
8030
8031 if (!pages)
8032 return;
8033
8034 for (i = 0; i < size; i++) {
8035 if (!pages[i])
8036 break;
8037 __free_page(pages[i]);
8038 }
8039 kfree(pages);
8040}
8041
8042static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
8043{
8044 struct page **pages;
8045 int i;
8046
8047 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
8048 if (!pages) {
8049 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
8050 return NULL;
8051 }
8052
8053 for (i = 0; i < size; i++) {
8054 pages[i] = alloc_page(gfp_flags);
8055 if (!pages[i]) {
8056 dprintk("%s: failed to allocate page\n", __func__);
8057 nfs4_free_pages(pages, size);
8058 return NULL;
8059 }
8060 }
8061
8062 return pages;
8063}
8064
b1f69b75
AA		 8065static void nfs4_layoutget_release(void *calldata)
8066{
8067 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 8068 struct inode *inode = lgp->args.inode;
8069 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8070 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8071
8072 dprintk("--> %s\n", __func__);
8554116e 8073 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 8074 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 8075 put_nfs_open_context(lgp->args.ctx);
8076 kfree(calldata);
8077 dprintk("<-- %s\n", __func__);
8078}
8079
8080static const struct rpc_call_ops nfs4_layoutget_call_ops = {
8081 .rpc_call_prepare = nfs4_layoutget_prepare,
8082 .rpc_call_done = nfs4_layoutget_done,
8083 .rpc_release = nfs4_layoutget_release,
8084};
8085
a0b0a6e3 8086struct pnfs_layout_segment *
183d9e7b 8087nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags)
b1f69b75 8088{
a47970ff
WAA		 8089 struct inode *inode = lgp->args.inode;
8090 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8091 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8092 struct rpc_task *task;
8093 struct rpc_message msg = {
8094 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
8095 .rpc_argp = &lgp->args,
8096 .rpc_resp = &lgp->res,
6ab59344 8097 .rpc_cred = lgp->cred,
b1f69b75
AA		 8098 };
8099 struct rpc_task_setup task_setup_data = {
8100 .rpc_client = server->client,
8101 .rpc_message = &msg,
8102 .callback_ops = &nfs4_layoutget_call_ops,
8103 .callback_data = lgp,
8104 .flags = RPC_TASK_ASYNC,
8105 };
a0b0a6e3 8106 struct pnfs_layout_segment *lseg = NULL;
bc23676c
TM		 8107 struct nfs4_exception exception = {
8108 .inode = inode,
8109 .timeout = *timeout,
8110 };
b1f69b75
AA		 8111 int status = 0;
8112
8113 dprintk("--> %s\n", __func__);
8114
4bd5a980
PT		 8115 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
8116 pnfs_get_layout_hdr(NFS_I(inode)->layout);
8117
8554116e
IK		 8118 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
8119 if (!lgp->args.layout.pages) {
8120 nfs4_layoutget_release(lgp);
a0b0a6e3 8121 return ERR_PTR(-ENOMEM);
8554116e
IK		 8122 }
8123 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
8124
35124a09 8125 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 8126 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 8127 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 8128
b1f69b75
AA		 8129 task = rpc_run_task(&task_setup_data);
8130 if (IS_ERR(task))
a0b0a6e3 8131 return ERR_CAST(task);
b1f69b75 8132 status = nfs4_wait_for_completion_rpc_task(task);
183d9e7b
JL		 8133 if (status == 0) {
8134 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
8135 *timeout = exception.timeout;
8136 }
8137
1037e6ea
TM		 8138 trace_nfs4_layoutget(lgp->args.ctx,
8139 &lgp->args.range,
8140 &lgp->res.range,
48c9579a 8141 &lgp->res.stateid,
1037e6ea 8142 status);
183d9e7b 8143
085b7a45
WAA		 8144 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8145 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 8146 lseg = pnfs_layout_process(lgp);
2e80dbe7 8147 nfs4_sequence_free_slot(&lgp->res.seq_res);
b1f69b75
AA		 8148 rpc_put_task(task);
8149 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 8150 if (status)
8151 return ERR_PTR(status);
8152 return lseg;
b1f69b75
AA		 8153}
8154
cbe82603
BH		 8155static void
8156nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8157{
8158 struct nfs4_layoutreturn *lrp = calldata;
8159
8160 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 8161 nfs41_setup_sequence(lrp->clp->cl_session,
8162 &lrp->args.seq_args,
8163 &lrp->res.seq_res,
8164 task);
cbe82603
BH		 8165}
8166
8167static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8168{
8169 struct nfs4_layoutreturn *lrp = calldata;
8170 struct nfs_server *server;
8171
8172 dprintk("--> %s\n", __func__);
8173
2e80dbe7 8174 if (!nfs41_sequence_process(task, &lrp->res.seq_res))
cbe82603
BH		 8175 return;
8176
8177 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 8178 switch (task->tk_status) {
8179 default:
8180 task->tk_status = 0;
8181 case 0:
8182 break;
8183 case -NFS4ERR_DELAY:
8478eaa1 8184 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 8185 break;
2e80dbe7 8186 nfs4_sequence_free_slot(&lrp->res.seq_res);
d00c5d43 8187 rpc_restart_call_prepare(task);
cbe82603
BH		 8188 return;
8189 }
cbe82603
BH		 8190 dprintk("<-- %s\n", __func__);
8191}
8192
8193static void nfs4_layoutreturn_release(void *calldata)
8194{
8195 struct nfs4_layoutreturn *lrp = calldata;
849b286f 8196 struct pnfs_layout_hdr *lo = lrp->args.layout;
c5d73716 8197 LIST_HEAD(freeme);
cbe82603
BH		 8198
8199 dprintk("--> %s\n", __func__);
849b286f 8200 spin_lock(&lo->plh_inode->i_lock);
52ec7be2
TM		 8201 if (lrp->res.lrs_present) {
8202 pnfs_mark_matching_lsegs_invalid(lo, &freeme,
8203 &lrp->args.range,
8204 be32_to_cpu(lrp->args.stateid.seqid));
849b286f 8205 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
52ec7be2
TM		 8206 } else
8207 pnfs_mark_layout_stateid_invalid(lo, &freeme);
d67ae825 8208 pnfs_clear_layoutreturn_waitbit(lo);
849b286f 8209 spin_unlock(&lo->plh_inode->i_lock);
2e80dbe7 8210 nfs4_sequence_free_slot(&lrp->res.seq_res);
c5d73716 8211 pnfs_free_lseg_list(&freeme);
70c3bd2b 8212 pnfs_put_layout_hdr(lrp->args.layout);
5a0ec8ac 8213 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 8214 kfree(calldata);
8215 dprintk("<-- %s\n", __func__);
8216}
8217
8218static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8219 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8220 .rpc_call_done = nfs4_layoutreturn_done,
8221 .rpc_release = nfs4_layoutreturn_release,
8222};
8223
6c16605d 8224int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 8225{
8226 struct rpc_task *task;
8227 struct rpc_message msg = {
8228 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8229 .rpc_argp = &lrp->args,
8230 .rpc_resp = &lrp->res,
9556000d 8231 .rpc_cred = lrp->cred,
cbe82603
BH		 8232 };
8233 struct rpc_task_setup task_setup_data = {
1771c577 8234 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8235 .rpc_message = &msg,
8236 .callback_ops = &nfs4_layoutreturn_call_ops,
8237 .callback_data = lrp,
8238 };
6c16605d 8239 int status = 0;
cbe82603 8240
99ade3c7
AE		 8241 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
8242 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
8243 &task_setup_data.rpc_client, &msg);
8244
cbe82603 8245 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8246 if (!sync) {
8247 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8248 if (!lrp->inode) {
8249 nfs4_layoutreturn_release(lrp);
8250 return -EAGAIN;
8251 }
8252 task_setup_data.flags |= RPC_TASK_ASYNC;
8253 }
a9c92d6b 8254 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8255 task = rpc_run_task(&task_setup_data);
8256 if (IS_ERR(task))
8257 return PTR_ERR(task);
5a0ec8ac
TM		 8258 if (sync)
8259 status = task->tk_status;
48c9579a 8260 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
cbe82603
BH		 8261 dprintk("<-- %s status=%d\n", __func__, status);
8262 rpc_put_task(task);
8263 return status;
8264}
8265
b1f69b75 8266static int
cd5875fe
TM		 8267_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8268 struct pnfs_device *pdev,
8269 struct rpc_cred *cred)
b1f69b75
AA		 8270{
8271 struct nfs4_getdeviceinfo_args args = {
8272 .pdev = pdev,
4e590803
TM		 8273 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8274 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8275 };
8276 struct nfs4_getdeviceinfo_res res = {
8277 .pdev = pdev,
8278 };
8279 struct rpc_message msg = {
8280 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8281 .rpc_argp = &args,
8282 .rpc_resp = &res,
cd5875fe 8283 .rpc_cred = cred,
b1f69b75
AA		 8284 };
8285 int status;
8286
8287 dprintk("--> %s\n", __func__);
7c513058 8288 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8289 if (res.notification & ~args.notify_types)
8290 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8291 if (res.notification != args.notify_types)
8292 pdev->nocache = 1;
4e590803 8293
b1f69b75
AA		 8294 dprintk("<-- %s status=%d\n", __func__, status);
8295
8296 return status;
8297}
8298
cd5875fe
TM		 8299int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8300 struct pnfs_device *pdev,
8301 struct rpc_cred *cred)
b1f69b75
AA		 8302{
8303 struct nfs4_exception exception = { };
8304 int err;
8305
8306 do {
8307 err = nfs4_handle_exception(server,
cd5875fe 8308 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8309 &exception);
8310 } while (exception.retry);
8311 return err;
8312}
8313EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8314
863a3c6c
AA		 8315static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8316{
8317 struct nfs4_layoutcommit_data *data = calldata;
8318 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 8319 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 8320
d9afbd1b
TM		 8321 nfs41_setup_sequence(session,
8322 &data->args.seq_args,
8323 &data->res.seq_res,
8324 task);
863a3c6c
AA		 8325}
8326
8327static void
8328nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8329{
8330 struct nfs4_layoutcommit_data *data = calldata;
8331 struct nfs_server *server = NFS_SERVER(data->args.inode);
8332
6ba7db34 8333 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8334 return;
8335
8336 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8337 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8338 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8339 case -NFS4ERR_BADLAYOUT: /* no layout */
8340 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8341 task->tk_status = 0;
e59d27e0 8342 case 0:
e59d27e0
TM		 8343 break;
8344 default:
8478eaa1 8345 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8346 rpc_restart_call_prepare(task);
8347 return;
8348 }
8349 }
863a3c6c
AA		 8350}
8351
8352static void nfs4_layoutcommit_release(void *calldata)
8353{
8354 struct nfs4_layoutcommit_data *data = calldata;
8355
db29c089 8356 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8357 nfs_post_op_update_inode_force_wcc(data->args.inode,
8358 data->res.fattr);
863a3c6c 8359 put_rpccred(data->cred);
472e2594 8360 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8361 kfree(data);
8362}
8363
8364static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8365 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8366 .rpc_call_done = nfs4_layoutcommit_done,
8367 .rpc_release = nfs4_layoutcommit_release,
8368};
8369
8370int
ef311537 8371nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8372{
8373 struct rpc_message msg = {
8374 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8375 .rpc_argp = &data->args,
8376 .rpc_resp = &data->res,
8377 .rpc_cred = data->cred,
8378 };
8379 struct rpc_task_setup task_setup_data = {
8380 .task = &data->task,
8381 .rpc_client = NFS_CLIENT(data->args.inode),
8382 .rpc_message = &msg,
8383 .callback_ops = &nfs4_layoutcommit_ops,
8384 .callback_data = data,
863a3c6c
AA		 8385 };
8386 struct rpc_task *task;
8387 int status = 0;
8388
b4839ebe
KM		 8389 dprintk("NFS: initiating layoutcommit call. sync %d "
8390 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8391 data->args.lastbytewritten,
8392 data->args.inode->i_ino);
8393
472e2594
TM		 8394 if (!sync) {
8395 data->inode = nfs_igrab_and_active(data->args.inode);
8396 if (data->inode == NULL) {
8397 nfs4_layoutcommit_release(data);
8398 return -EAGAIN;
8399 }
8400 task_setup_data.flags = RPC_TASK_ASYNC;
8401 }
a9c92d6b 8402 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8403 task = rpc_run_task(&task_setup_data);
8404 if (IS_ERR(task))
8405 return PTR_ERR(task);
472e2594
TM		 8406 if (sync)
8407 status = task->tk_status;
48c9579a 8408 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
863a3c6c
AA		 8409 dprintk("%s: status %d\n", __func__, status);
8410 rpc_put_task(task);
8411 return status;
8412}
fca78d6d 8413
97431204
AA		 8414/**
8415 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8416 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8417 */
fca78d6d
BS		 8418static int
8419_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8420 struct nfs_fsinfo *info,
8421 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8422{
8423 struct nfs41_secinfo_no_name_args args = {
8424 .style = SECINFO_STYLE_CURRENT_FH,
8425 };
8426 struct nfs4_secinfo_res res = {
8427 .flavors = flavors,
8428 };
8429 struct rpc_message msg = {
8430 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8431 .rpc_argp = &args,
8432 .rpc_resp = &res,
8433 };
b1b3e136 8434 struct rpc_clnt *clnt = server->client;
7cb852df 8435 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8436 int status;
8437
8438 if (use_integrity) {
8439 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8440 cred = nfs4_get_clid_cred(server->nfs_client);
8441 msg.rpc_cred = cred;
b1b3e136
WAA		 8442 }
8443
8444 dprintk("--> %s\n", __func__);
8445 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8446 &res.seq_res, 0);
8447 dprintk("<-- %s status=%d\n", __func__, status);
8448
7cb852df
WAA		 8449 if (cred)
8450 put_rpccred(cred);
b1b3e136
WAA		 8451
8452 return status;
fca78d6d
BS		 8453}
8454
8455static int
8456nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8457 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8458{
8459 struct nfs4_exception exception = { };
8460 int err;
8461 do {
b1b3e136
WAA		 8462 /* first try using integrity protection */
8463 err = -NFS4ERR_WRONGSEC;
8464
8465 /* try to use integrity protection with machine cred */
8466 if (_nfs4_is_integrity_protected(server->nfs_client))
8467 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8468 flavors, true);
8469
8470 /*
8471 * if unable to use integrity protection, or SECINFO with
8472 * integrity protection returns NFS4ERR_WRONGSEC (which is
8473 * disallowed by spec, but exists in deployed servers) use
8474 * the current filesystem's rpc_client and the user cred.
8475 */
8476 if (err == -NFS4ERR_WRONGSEC)
8477 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8478 flavors, false);
8479
fca78d6d
BS		 8480 switch (err) {
8481 case 0:
8482 case -NFS4ERR_WRONGSEC:
78b19bae 8483 case -ENOTSUPP:
05e9cfb4 8484 goto out;
fca78d6d
BS		 8485 default:
8486 err = nfs4_handle_exception(server, err, &exception);
8487 }
8488 } while (exception.retry);
05e9cfb4 8489out:
fca78d6d
BS		 8490 return err;
8491}
8492
8493static int
8494nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8495 struct nfs_fsinfo *info)
8496{
8497 int err;
8498 struct page *page;
367156d9 8499 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8500 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8501 struct nfs4_secinfo4 *secinfo;
8502 int i;
fca78d6d
BS		 8503
8504 page = alloc_page(GFP_KERNEL);
8505 if (!page) {
8506 err = -ENOMEM;
8507 goto out;
8508 }
8509
8510 flavors = page_address(page);
8511 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8512
8513 /*
8514 * Fall back on "guess and check" method if
8515 * the server doesn't support SECINFO_NO_NAME
8516 */
78b19bae 8517 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8518 err = nfs4_find_root_sec(server, fhandle, info);
8519 goto out_freepage;
8520 }
8521 if (err)
8522 goto out_freepage;
8523
58a8cf12
WAA		 8524 for (i = 0; i < flavors->num_flavors; i++) {
8525 secinfo = &flavors->flavors[i];
8526
8527 switch (secinfo->flavor) {
8528 case RPC_AUTH_NULL:
8529 case RPC_AUTH_UNIX:
8530 case RPC_AUTH_GSS:
8531 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8532 &secinfo->flavor_info);
8533 break;
8534 default:
8535 flavor = RPC_AUTH_MAXFLAVOR;
8536 break;
8537 }
8538
4d4b69dd
WAA		 8539 if (!nfs_auth_info_match(&server->auth_info, flavor))
8540 flavor = RPC_AUTH_MAXFLAVOR;
8541
58a8cf12
WAA		 8542 if (flavor != RPC_AUTH_MAXFLAVOR) {
8543 err = nfs4_lookup_root_sec(server, fhandle,
8544 info, flavor);
8545 if (!err)
8546 break;
8547 }
8548 }
8549
8550 if (flavor == RPC_AUTH_MAXFLAVOR)
8551 err = -EPERM;
fca78d6d
BS		 8552
8553out_freepage:
8554 put_page(page);
8555 if (err == -EACCES)
8556 return -EPERM;
8557out:
8558 return err;
8559}
1cab0652 8560
ab7cb0df
TM		 8561static int _nfs41_test_stateid(struct nfs_server *server,
8562 nfs4_stateid *stateid,
8563 struct rpc_cred *cred)
7d974794
BS		 8564{
8565 int status;
8566 struct nfs41_test_stateid_args args = {
1cab0652 8567 .stateid = stateid,
7d974794
BS		 8568 };
8569 struct nfs41_test_stateid_res res;
8570 struct rpc_message msg = {
8571 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8572 .rpc_argp = &args,
8573 .rpc_resp = &res,
ab7cb0df 8574 .rpc_cred = cred,
7d974794 8575 };
3787d506
WAA		 8576 struct rpc_clnt *rpc_client = server->client;
8577
8578 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8579 &rpc_client, &msg);
1cab0652 8580
38527b15 8581 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8582 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8583 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8584 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8585 &args.seq_args, &res.seq_res);
38527b15
CL		 8586 if (status != NFS_OK) {
8587 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8588 return status;
38527b15
CL		 8589 }
8590 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8591 return -res.status;
7d974794
BS		 8592}
8593
38527b15
CL		 8594/**
8595 * nfs41_test_stateid - perform a TEST_STATEID operation
8596 *
8597 * @server: server / transport on which to perform the operation
8598 * @stateid: state ID to test
ab7cb0df 8599 * @cred: credential
38527b15
CL		 8600 *
8601 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8602 * Otherwise a negative NFS4ERR value is returned if the operation
8603 * failed or the state ID is not currently valid.
8604 */
ab7cb0df
TM		 8605static int nfs41_test_stateid(struct nfs_server *server,
8606 nfs4_stateid *stateid,
8607 struct rpc_cred *cred)
7d974794
BS		 8608{
8609 struct nfs4_exception exception = { };
8610 int err;
8611 do {
ab7cb0df 8612 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8613 if (err != -NFS4ERR_DELAY)
8614 break;
8615 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8616 } while (exception.retry);
8617 return err;
8618}
9aeda35f 8619
7c1d5fae
TM		 8620struct nfs_free_stateid_data {
8621 struct nfs_server *server;
8622 struct nfs41_free_stateid_args args;
9aeda35f 8623 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8624};
8625
8626static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8627{
8628 struct nfs_free_stateid_data *data = calldata;
8629 nfs41_setup_sequence(nfs4_get_session(data->server),
8630 &data->args.seq_args,
8631 &data->res.seq_res,
8632 task);
8633}
8634
8635static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8636{
8637 struct nfs_free_stateid_data *data = calldata;
8638
8639 nfs41_sequence_done(task, &data->res.seq_res);
8640
8641 switch (task->tk_status) {
8642 case -NFS4ERR_DELAY:
8478eaa1 8643 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8644 rpc_restart_call_prepare(task);
8645 }
8646}
8647
8648static void nfs41_free_stateid_release(void *calldata)
8649{
8650 kfree(calldata);
8651}
8652
17f26b12 8653static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8654 .rpc_call_prepare = nfs41_free_stateid_prepare,
8655 .rpc_call_done = nfs41_free_stateid_done,
8656 .rpc_release = nfs41_free_stateid_release,
8657};
8658
8659static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8660 nfs4_stateid *stateid,
ab7cb0df 8661 struct rpc_cred *cred,
7c1d5fae
TM		 8662 bool privileged)
8663{
9aeda35f
BS		 8664 struct rpc_message msg = {
8665 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8666 .rpc_cred = cred,
9aeda35f 8667 };
7c1d5fae
TM		 8668 struct rpc_task_setup task_setup = {
8669 .rpc_client = server->client,
8670 .rpc_message = &msg,
8671 .callback_ops = &nfs41_free_stateid_ops,
8672 .flags = RPC_TASK_ASYNC,
8673 };
8674 struct nfs_free_stateid_data *data;
9aeda35f 8675
3787d506
WAA		 8676 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8677 &task_setup.rpc_client, &msg);
8678
38527b15 8679 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8680 data = kmalloc(sizeof(*data), GFP_NOFS);
8681 if (!data)
8682 return ERR_PTR(-ENOMEM);
8683 data->server = server;
8684 nfs4_stateid_copy(&data->args.stateid, stateid);
8685
8686 task_setup.callback_data = data;
8687
8688 msg.rpc_argp = &data->args;
8689 msg.rpc_resp = &data->res;
a9c92d6b 8690 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8691 if (privileged)
8692 nfs4_set_sequence_privileged(&data->args.seq_args);
8693
8694 return rpc_run_task(&task_setup);
9aeda35f
BS		 8695}
8696
38527b15
CL		 8697/**
8698 * nfs41_free_stateid - perform a FREE_STATEID operation
8699 *
8700 * @server: server / transport on which to perform the operation
8701 * @stateid: state ID to release
ab7cb0df 8702 * @cred: credential
38527b15
CL		 8703 *
8704 * Returns NFS_OK if the server freed "stateid". Otherwise a
8705 * negative NFS4ERR value is returned.
8706 */
ab7cb0df
TM		 8707static int nfs41_free_stateid(struct nfs_server *server,
8708 nfs4_stateid *stateid,
8709 struct rpc_cred *cred)
9aeda35f 8710{
7c1d5fae
TM		 8711 struct rpc_task *task;
8712 int ret;
8713
ab7cb0df 8714 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8715 if (IS_ERR(task))
8716 return PTR_ERR(task);
8717 ret = rpc_wait_for_completion_task(task);
8718 if (!ret)
8719 ret = task->tk_status;
8720 rpc_put_task(task);
8721 return ret;
9aeda35f 8722}
36281caa 8723
f1cdae87
JL		 8724static void
8725nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8726{
8727 struct rpc_task *task;
ab7cb0df 8728 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8729
ab7cb0df 8730 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8731 nfs4_free_lock_state(server, lsp);
8732 if (IS_ERR(task))
f1cdae87 8733 return;
c8b2d0bf 8734 rpc_put_task(task);
c8b2d0bf
TM		 8735}
8736
36281caa
TM		 8737static bool nfs41_match_stateid(const nfs4_stateid *s1,
8738 const nfs4_stateid *s2)
8739{
93b717fd
TM		 8740 if (s1->type != s2->type)
8741 return false;
8742
2d2f24ad 8743 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8744 return false;
8745
2d2f24ad 8746 if (s1->seqid == s2->seqid)
36281caa 8747 return true;
2d2f24ad 8748 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8749 return true;
8750
8751 return false;
8752}
8753
557134a3
AA		 8754#endif /* CONFIG_NFS_V4_1 */
8755
36281caa
TM		 8756static bool nfs4_match_stateid(const nfs4_stateid *s1,
8757 const nfs4_stateid *s2)
8758{
f597c537 8759 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8760}
8761
8762
17280175 8763static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8764 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8765 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8766 .recover_open = nfs4_open_reclaim,
8767 .recover_lock = nfs4_lock_reclaim,
591d71cb 8768 .establish_clid = nfs4_init_clientid,
05f4c350 8769 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8770};
8771
591d71cb 8772#if defined(CONFIG_NFS_V4_1)
17280175 8773static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8774 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8775 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8776 .recover_open = nfs4_open_reclaim,
8777 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8778 .establish_clid = nfs41_init_clientid,
fce5c838 8779 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8780 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8781};
8782#endif /* CONFIG_NFS_V4_1 */
8783
17280175 8784static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8785 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8786 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8787 .recover_open = nfs40_open_expired,
591d71cb
AA		 8788 .recover_lock = nfs4_lock_expired,
8789 .establish_clid = nfs4_init_clientid,
8790};
8791
8792#if defined(CONFIG_NFS_V4_1)
17280175 8793static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8794 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8795 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8796 .recover_open = nfs41_open_expired,
8797 .recover_lock = nfs41_lock_expired,
4d643d1d 8798 .establish_clid = nfs41_init_clientid,
1da177e4 8799};
591d71cb 8800#endif /* CONFIG_NFS_V4_1 */
1da177e4 8801
17280175 8802static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8803 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8804 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8805 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8806};
8807
8808#if defined(CONFIG_NFS_V4_1)
17280175 8809static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8810 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8811 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8812 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8813};
8814#endif
8815
ec011fe8 8816static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8817 .get_locations = _nfs40_proc_get_locations,
44c99933 8818 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8819};
8820
8821#if defined(CONFIG_NFS_V4_1)
8822static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8823 .get_locations = _nfs41_proc_get_locations,
44c99933 8824 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8825};
8826#endif /* CONFIG_NFS_V4_1 */
8827
97dc1359
TM		 8828static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8829 .minor_version = 0,
39c6daae
TM		 8830 .init_caps = NFS_CAP_READDIRPLUS
8831 | NFS_CAP_ATOMIC_OPEN
39c6daae 8832 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8833 .init_client = nfs40_init_client,
8834 .shutdown_client = nfs40_shutdown_client,
36281caa 8835 .match_stateid = nfs4_match_stateid,
fca78d6d 8836 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8837 .free_lock_state = nfs4_release_lockowner,
63f5f796 8838 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 8839 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8840 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8841 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8842 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8843 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8844};
8845
8846#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 8847static struct nfs_seqid *
8848nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8849{
8850 return NULL;
8851}
8852
97dc1359
TM		 8853static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8854 .minor_version = 1,
39c6daae
TM		 8855 .init_caps = NFS_CAP_READDIRPLUS
8856 | NFS_CAP_ATOMIC_OPEN
3b66486c 8857 | NFS_CAP_POSIX_LOCK
49f9a0fa 8858 | NFS_CAP_STATEID_NFSV41
e983120e 8859 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8860 .init_client = nfs41_init_client,
8861 .shutdown_client = nfs41_shutdown_client,
36281caa 8862 .match_stateid = nfs41_match_stateid,
fca78d6d 8863 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8864 .free_lock_state = nfs41_free_lock_state,
63f5f796 8865 .alloc_seqid = nfs_alloc_no_seqid,
9915ea7e 8866 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8867 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8868 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8869 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8870 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8871};
8872#endif
8873
42c2c424
SD		 8874#if defined(CONFIG_NFS_V4_2)
8875static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8876 .minor_version = 2,
7017310a
BS		 8877 .init_caps = NFS_CAP_READDIRPLUS
8878 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 8879 | NFS_CAP_POSIX_LOCK
8880 | NFS_CAP_STATEID_NFSV41
e983120e 8881 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 8882 | NFS_CAP_ALLOCATE
2e72448b 8883 | NFS_CAP_COPY
624bd5b7 8884 | NFS_CAP_DEALLOCATE
6c5a0d89 8885 | NFS_CAP_SEEK
e5341f3a
PT		 8886 | NFS_CAP_LAYOUTSTATS
8887 | NFS_CAP_CLONE,
abf79bb3
CL		 8888 .init_client = nfs41_init_client,
8889 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8890 .match_stateid = nfs41_match_stateid,
8891 .find_root_sec = nfs41_find_root_sec,
7017310a 8892 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8893 .call_sync_ops = &nfs41_call_sync_ops,
63f5f796 8894 .alloc_seqid = nfs_alloc_no_seqid,
42c2c424
SD		 8895 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8896 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8897 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 8898 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 8899};
8900#endif
8901
97dc1359
TM		 8902const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8903 [0] = &nfs_v4_0_minor_ops,
8904#if defined(CONFIG_NFS_V4_1)
8905 [1] = &nfs_v4_1_minor_ops,
8906#endif
42c2c424
SD		 8907#if defined(CONFIG_NFS_V4_2)
8908 [2] = &nfs_v4_2_minor_ops,
8909#endif
97dc1359
TM		 8910};
8911
13997823 8912static ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
c4803c49
AG		 8913{
8914 ssize_t error, error2;
8915
8916 error = generic_listxattr(dentry, list, size);
8917 if (error < 0)
8918 return error;
8919 if (list) {
8920 list += error;
8921 size -= error;
8922 }
8923
8924 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
8925 if (error2 < 0)
8926 return error2;
8927 return error + error2;
8928}
8929
17f26b12 8930static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8931 .create = nfs_create,
8932 .lookup = nfs_lookup,
8933 .atomic_open = nfs_atomic_open,
8934 .link = nfs_link,
8935 .unlink = nfs_unlink,
8936 .symlink = nfs_symlink,
8937 .mkdir = nfs_mkdir,
8938 .rmdir = nfs_rmdir,
8939 .mknod = nfs_mknod,
8940 .rename = nfs_rename,
8941 .permission = nfs_permission,
8942 .getattr = nfs_getattr,
8943 .setattr = nfs_setattr,
8944 .getxattr = generic_getxattr,
8945 .setxattr = generic_setxattr,
c4803c49 8946 .listxattr = nfs4_listxattr,
73a79706
BS		 8947 .removexattr = generic_removexattr,
8948};
8949
92e1d5be 8950static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8951 .permission = nfs_permission,
8952 .getattr = nfs_getattr,
8953 .setattr = nfs_setattr,
64c2ce8b
AK		 8954 .getxattr = generic_getxattr,
8955 .setxattr = generic_setxattr,
c4803c49 8956 .listxattr = nfs4_listxattr,
64c2ce8b 8957 .removexattr = generic_removexattr,
6b3b5496
BF		 8958};
8959
509de811 8960const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8961 .version = 4, /* protocol version */
8962 .dentry_ops = &nfs4_dentry_operations,
8963 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8964 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8965 .file_ops = &nfs4_file_operations,
1da177e4 8966 .getroot = nfs4_proc_get_root,
281cad46 8967 .submount = nfs4_submount,
ff9099f2 8968 .try_mount = nfs4_try_mount,
1da177e4
LT		 8969 .getattr = nfs4_proc_getattr,
8970 .setattr = nfs4_proc_setattr,
8971 .lookup = nfs4_proc_lookup,
8972 .access = nfs4_proc_access,
8973 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8974 .create = nfs4_proc_create,
8975 .remove = nfs4_proc_remove,
8976 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8977 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8978 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8979 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8980 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8981 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8982 .link = nfs4_proc_link,
8983 .symlink = nfs4_proc_symlink,
8984 .mkdir = nfs4_proc_mkdir,
8985 .rmdir = nfs4_proc_remove,
8986 .readdir = nfs4_proc_readdir,
8987 .mknod = nfs4_proc_mknod,
8988 .statfs = nfs4_proc_statfs,
8989 .fsinfo = nfs4_proc_fsinfo,
8990 .pathconf = nfs4_proc_pathconf,
e9326dca 8991 .set_capabilities = nfs4_server_capabilities,
1da177e4 8992 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8993 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8994 .read_setup = nfs4_proc_read_setup,
ec06c096 8995 .read_done = nfs4_read_done,
1da177e4 8996 .write_setup = nfs4_proc_write_setup,
788e7a89 8997 .write_done = nfs4_write_done,
1da177e4 8998 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8999 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 9000 .commit_done = nfs4_commit_done,
1da177e4 9001 .lock = nfs4_proc_lock,
e50a1c2e 9002 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 9003 .close_context = nfs4_close_context,
2b484297 9004 .open_context = nfs4_atomic_open,
011e2a7f 9005 .have_delegation = nfs4_have_delegation,
57ec14c5 9006 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 9007 .alloc_client = nfs4_alloc_client,
45a52a02 9008 .init_client = nfs4_init_client,
cdb7eced 9009 .free_client = nfs4_free_client,
1179acc6
BS		 9010 .create_server = nfs4_create_server,
9011 .clone_server = nfs_clone_server,
1da177e4
LT		 9012};
9013
64c2ce8b 9014static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
98e9cb57 9015 .name = XATTR_NAME_NFSV4_ACL,
64c2ce8b
AK		 9016 .list = nfs4_xattr_list_nfs4_acl,
9017 .get = nfs4_xattr_get_nfs4_acl,
9018 .set = nfs4_xattr_set_nfs4_acl,
9019};
9020
9021const struct xattr_handler *nfs4_xattr_handlers[] = {
9022 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 9023#ifdef CONFIG_NFS_V4_SECURITY_LABEL
9024 &nfs4_xattr_nfs4_label_handler,
9025#endif
64c2ce8b
AK		 9026 NULL
9027};
9028
1da177e4
LT		 9029/*
9030 * Local variables:
9031 * c-basic-offset: 8
9032 * End:
9033 */
Linux kernel - Deliverables
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