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NFSv4: Label stateids with the type
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
feaff8e5 41#include <linux/file.h>
1da177e4 42#include <linux/string.h>
652f89f6
TM		 43#include <linux/ratelimit.h>
44#include <linux/printk.h>
5a0e3ad6 45#include <linux/slab.h>
1da177e4
LT		 46#include <linux/sunrpc/clnt.h>
47#include <linux/nfs.h>
48#include <linux/nfs4.h>
49#include <linux/nfs_fs.h>
50#include <linux/nfs_page.h>
9b7160c5 51#include <linux/nfs_mount.h>
1da177e4 52#include <linux/namei.h>
02a913a7 53#include <linux/mount.h>
99fe60d0 54#include <linux/module.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
40c64c26 66#include "nfs4idmap.h"
73e39aaa 67#include "nfs4session.h"
de242c0b 68#include "fscache.h"
1da177e4 69
c6d01c6f
TM		 70#include "nfs4trace.h"
71
1da177e4
LT		 72#define NFSDBG_FACILITY NFSDBG_PROC
73
2066fe89 74#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 75#define NFS4_POLL_RETRY_MAX (15*HZ)
76
a1d1c4f1
TM		 77/* file attributes which can be mapped to nfs attributes */
78#define NFS4_VALID_ATTRS (ATTR_MODE \
79 | ATTR_UID \
80 | ATTR_GID \
81 | ATTR_SIZE \
82 | ATTR_ATIME \
83 | ATTR_MTIME \
84 | ATTR_CTIME \
85 | ATTR_ATIME_SET \
86 | ATTR_MTIME_SET)
87
cdd4e68b 88struct nfs4_opendata;
864472e9 89static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 90static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 91static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
81934ddb 92static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 93static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
94static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 95static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
96 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 97 struct nfs4_state *state, struct nfs4_label *ilabel,
98 struct nfs4_label *olabel);
f062eb6c 99#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 100static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
101 struct rpc_cred *);
102static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
103 struct rpc_cred *);
f062eb6c 104#endif
aa9c2669
DQ		 105
106#ifdef CONFIG_NFS_V4_SECURITY_LABEL
107static inline struct nfs4_label *
108nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
109 struct iattr *sattr, struct nfs4_label *label)
110{
111 int err;
112
113 if (label == NULL)
114 return NULL;
115
116 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
117 return NULL;
118
aa9c2669
DQ		 119 err = security_dentry_init_security(dentry, sattr->ia_mode,
120 &dentry->d_name, (void **)&label->label, &label->len);
121 if (err == 0)
122 return label;
123
124 return NULL;
125}
126static inline void
127nfs4_label_release_security(struct nfs4_label *label)
128{
129 if (label)
130 security_release_secctx(label->label, label->len);
131}
132static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
133{
134 if (label)
135 return server->attr_bitmask;
136
137 return server->attr_bitmask_nl;
138}
139#else
140static inline struct nfs4_label *
141nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
142 struct iattr *sattr, struct nfs4_label *l)
143{ return NULL; }
144static inline void
145nfs4_label_release_security(struct nfs4_label *label)
146{ return; }
147static inline u32 *
148nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
149{ return server->attr_bitmask; }
150#endif
151
1da177e4 152/* Prevent leaks of NFSv4 errors into userland */
46f72f57 153static int nfs4_map_errors(int err)
1da177e4 154{
52567b03
TM		 155 if (err >= -1000)
156 return err;
157 switch (err) {
158 case -NFS4ERR_RESOURCE:
30005121
WAA		 159 case -NFS4ERR_LAYOUTTRYLATER:
160 case -NFS4ERR_RECALLCONFLICT:
52567b03 161 return -EREMOTEIO;
7ebb9315 162 case -NFS4ERR_WRONGSEC:
8897538e 163 case -NFS4ERR_WRONG_CRED:
7ebb9315 164 return -EPERM;
3ddeb7c5
TM		 165 case -NFS4ERR_BADOWNER:
166 case -NFS4ERR_BADNAME:
167 return -EINVAL;
fb13bfa7
TM		 168 case -NFS4ERR_SHARE_DENIED:
169 return -EACCES;
f25efd85
SD		 170 case -NFS4ERR_MINOR_VERS_MISMATCH:
171 return -EPROTONOSUPPORT;
6e3cf241
TM		 172 case -NFS4ERR_FILE_OPEN:
173 return -EBUSY;
52567b03 174 default:
1da177e4 175 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 176 __func__, -err);
52567b03 177 break;
1da177e4 178 }
52567b03 179 return -EIO;
1da177e4
LT		 180}
181
182/*
183 * This is our standard bitmap for GETATTR requests.
184 */
1549210f 185const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 186 FATTR4_WORD0_TYPE
187 | FATTR4_WORD0_CHANGE
188 | FATTR4_WORD0_SIZE
189 | FATTR4_WORD0_FSID
190 | FATTR4_WORD0_FILEID,
191 FATTR4_WORD1_MODE
192 | FATTR4_WORD1_NUMLINKS
193 | FATTR4_WORD1_OWNER
194 | FATTR4_WORD1_OWNER_GROUP
195 | FATTR4_WORD1_RAWDEV
196 | FATTR4_WORD1_SPACE_USED
197 | FATTR4_WORD1_TIME_ACCESS
198 | FATTR4_WORD1_TIME_METADATA
ea96d1ec
AS		 199 | FATTR4_WORD1_TIME_MODIFY
200 | FATTR4_WORD1_MOUNTED_ON_FILEID,
aa9c2669
DQ		 201#ifdef CONFIG_NFS_V4_SECURITY_LABEL
202 FATTR4_WORD2_SECURITY_LABEL
203#endif
1da177e4
LT		 204};
205
1549210f
TM		 206static const u32 nfs4_pnfs_open_bitmap[3] = {
207 FATTR4_WORD0_TYPE
208 | FATTR4_WORD0_CHANGE
209 | FATTR4_WORD0_SIZE
210 | FATTR4_WORD0_FSID
211 | FATTR4_WORD0_FILEID,
212 FATTR4_WORD1_MODE
213 | FATTR4_WORD1_NUMLINKS
214 | FATTR4_WORD1_OWNER
215 | FATTR4_WORD1_OWNER_GROUP
216 | FATTR4_WORD1_RAWDEV
217 | FATTR4_WORD1_SPACE_USED
218 | FATTR4_WORD1_TIME_ACCESS
219 | FATTR4_WORD1_TIME_METADATA
220 | FATTR4_WORD1_TIME_MODIFY,
221 FATTR4_WORD2_MDSTHRESHOLD
95864c91
TM		 222#ifdef CONFIG_NFS_V4_SECURITY_LABEL
223 | FATTR4_WORD2_SECURITY_LABEL
224#endif
1549210f
TM		 225};
226
e23008ec
AA		 227static const u32 nfs4_open_noattr_bitmap[3] = {
228 FATTR4_WORD0_TYPE
229 | FATTR4_WORD0_CHANGE
230 | FATTR4_WORD0_FILEID,
231};
232
a09df2ca 233const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 234 FATTR4_WORD0_FILES_AVAIL
235 | FATTR4_WORD0_FILES_FREE
236 | FATTR4_WORD0_FILES_TOTAL,
237 FATTR4_WORD1_SPACE_AVAIL
238 | FATTR4_WORD1_SPACE_FREE
239 | FATTR4_WORD1_SPACE_TOTAL
240};
241
a09df2ca 242const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 243 FATTR4_WORD0_MAXLINK
244 | FATTR4_WORD0_MAXNAME,
245 0
246};
247
dae100c2 248const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 249 | FATTR4_WORD0_MAXREAD
250 | FATTR4_WORD0_MAXWRITE
251 | FATTR4_WORD0_LEASE_TIME,
55b6e774 252 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 253 | FATTR4_WORD1_FS_LAYOUT_TYPES,
254 FATTR4_WORD2_LAYOUT_BLKSIZE
2a92ee92 255 | FATTR4_WORD2_CLONE_BLKSIZE
1da177e4
LT		 256};
257
a09df2ca 258const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 259 FATTR4_WORD0_TYPE
260 | FATTR4_WORD0_CHANGE
261 | FATTR4_WORD0_SIZE
262 | FATTR4_WORD0_FSID
263 | FATTR4_WORD0_FILEID
264 | FATTR4_WORD0_FS_LOCATIONS,
265 FATTR4_WORD1_MODE
266 | FATTR4_WORD1_NUMLINKS
267 | FATTR4_WORD1_OWNER
268 | FATTR4_WORD1_OWNER_GROUP
269 | FATTR4_WORD1_RAWDEV
270 | FATTR4_WORD1_SPACE_USED
271 | FATTR4_WORD1_TIME_ACCESS
272 | FATTR4_WORD1_TIME_METADATA
273 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 274 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 275};
276
bc4785cd 277static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 278 struct nfs4_readdir_arg *readdir)
279{
0dbb4c67 280 __be32 *start, *p;
1da177e4 281
1da177e4 282 if (cookie > 2) {
b7ef1956 283 readdir->cookie = cookie;
1da177e4
LT		 284 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
285 return;
286 }
287
288 readdir->cookie = 0;
289 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
290 if (cookie == 2)
291 return;
292
293 /*
294 * NFSv4 servers do not return entries for '.' and '..'
295 * Therefore, we fake these entries here. We let '.'
296 * have cookie 0 and '..' have cookie 1. Note that
297 * when talking to the server, we always send cookie 0
298 * instead of 1 or 2.
299 */
2b86ce2d 300 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 301
302 if (cookie == 0) {
303 *p++ = xdr_one; /* next */
304 *p++ = xdr_zero; /* cookie, first word */
305 *p++ = xdr_one; /* cookie, second word */
306 *p++ = xdr_one; /* entry len */
307 memcpy(p, ".\0\0\0", 4); /* entry */
308 p++;
309 *p++ = xdr_one; /* bitmap length */
310 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
311 *p++ = htonl(8); /* attribute buffer length */
2b0143b5 312 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
1da177e4
LT		 313 }
314
315 *p++ = xdr_one; /* next */
316 *p++ = xdr_zero; /* cookie, first word */
317 *p++ = xdr_two; /* cookie, second word */
318 *p++ = xdr_two; /* entry len */
319 memcpy(p, "..\0\0", 4); /* entry */
320 p++;
321 *p++ = xdr_one; /* bitmap length */
322 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
323 *p++ = htonl(8); /* attribute buffer length */
2b0143b5 324 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
1da177e4
LT		 325
326 readdir->pgbase = (char *)p - (char *)start;
327 readdir->count -= readdir->pgbase;
2b86ce2d 328 kunmap_atomic(start);
1da177e4
LT		 329}
330
8478eaa1
N		 331static long nfs4_update_delay(long *timeout)
332{
333 long ret;
334 if (!timeout)
335 return NFS4_POLL_RETRY_MAX;
336 if (*timeout <= 0)
337 *timeout = NFS4_POLL_RETRY_MIN;
338 if (*timeout > NFS4_POLL_RETRY_MAX)
339 *timeout = NFS4_POLL_RETRY_MAX;
340 ret = *timeout;
341 *timeout <<= 1;
342 return ret;
343}
344
65de872e
TM		 345static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
346{
347 int res = 0;
348
349 might_sleep();
350
8478eaa1
N		 351 freezable_schedule_timeout_killable_unsafe(
352 nfs4_update_delay(timeout));
65de872e
TM		 353 if (fatal_signal_pending(current))
354 res = -ERESTARTSYS;
65de872e
TM		 355 return res;
356}
357
358/* This is the error handling routine for processes that are allowed
359 * to sleep.
360 */
b3c2aa07
TM		 361static int nfs4_do_handle_exception(struct nfs_server *server,
362 int errorcode, struct nfs4_exception *exception)
65de872e
TM		 363{
364 struct nfs_client *clp = server->nfs_client;
9e33bed5 365 struct nfs4_state *state = exception->state;
3114ea7a 366 struct inode *inode = exception->inode;
65de872e
TM		 367 int ret = errorcode;
368
b3c2aa07
TM		 369 exception->delay = 0;
370 exception->recovering = 0;
65de872e
TM		 371 exception->retry = 0;
372 switch(errorcode) {
373 case 0:
374 return 0;
3114ea7a 375 case -NFS4ERR_OPENMODE:
5ba12443
TM		 376 case -NFS4ERR_DELEG_REVOKED:
377 case -NFS4ERR_ADMIN_REVOKED:
378 case -NFS4ERR_BAD_STATEID:
4816fdad
TM		 379 if (inode && nfs_async_inode_return_delegation(inode,
380 NULL) == 0)
381 goto wait_on_recovery;
3114ea7a
TM		 382 if (state == NULL)
383 break;
5d422301
TM		 384 ret = nfs4_schedule_stateid_recovery(server, state);
385 if (ret < 0)
386 break;
3114ea7a 387 goto wait_on_recovery;
0ced63d1 388 case -NFS4ERR_EXPIRED:
5d422301
TM		 389 if (state != NULL) {
390 ret = nfs4_schedule_stateid_recovery(server, state);
391 if (ret < 0)
392 break;
393 }
65de872e 394 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 395 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 396 nfs4_schedule_lease_recovery(clp);
397 goto wait_on_recovery;
519ae255
CL		 398 case -NFS4ERR_MOVED:
399 ret = nfs4_schedule_migration_recovery(server);
400 if (ret < 0)
401 break;
402 goto wait_on_recovery;
8ef2f8d4
CL		 403 case -NFS4ERR_LEASE_MOVED:
404 nfs4_schedule_lease_moved_recovery(clp);
405 goto wait_on_recovery;
03391693 406#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 407 case -NFS4ERR_BADSESSION:
408 case -NFS4ERR_BADSLOT:
409 case -NFS4ERR_BAD_HIGH_SLOT:
410 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
411 case -NFS4ERR_DEADSESSION:
412 case -NFS4ERR_SEQ_FALSE_RETRY:
413 case -NFS4ERR_SEQ_MISORDERED:
414 dprintk("%s ERROR: %d Reset session\n", __func__,
415 errorcode);
9f594791 416 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 417 goto wait_on_recovery;
03391693 418#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 419 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 420 if (exception->timeout > HZ) {
421 /* We have retried a decent amount, time to
422 * fail
423 */
424 ret = -EBUSY;
425 break;
426 }
65de872e 427 case -NFS4ERR_DELAY:
2598ed34
TM		 428 nfs_inc_server_stats(server, NFSIOS_DELAY);
429 case -NFS4ERR_GRACE:
b3c2aa07
TM		 430 exception->delay = 1;
431 return 0;
432
a8a4ae3a 433 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 434 case -NFS4ERR_OLD_STATEID:
435 exception->retry = 1;
b064eca2
TM		 436 break;
437 case -NFS4ERR_BADOWNER:
438 /* The following works around a Linux server bug! */
439 case -NFS4ERR_BADNAME:
440 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
441 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
442 exception->retry = 1;
443 printk(KERN_WARNING "NFS: v4 server %s "
444 "does not accept raw "
445 "uid/gids. "
446 "Reenabling the idmapper.\n",
447 server->nfs_client->cl_hostname);
448 }
65de872e
TM		 449 }
450 /* We failed to handle the error */
451 return nfs4_map_errors(ret);
0400a6b0 452wait_on_recovery:
b3c2aa07
TM		 453 exception->recovering = 1;
454 return 0;
455}
456
457/* This is the error handling routine for processes that are allowed
458 * to sleep.
459 */
460int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
461{
462 struct nfs_client *clp = server->nfs_client;
463 int ret;
464
465 ret = nfs4_do_handle_exception(server, errorcode, exception);
466 if (exception->delay) {
467 ret = nfs4_delay(server->client, &exception->timeout);
468 goto out_retry;
469 }
470 if (exception->recovering) {
471 ret = nfs4_wait_clnt_recover(clp);
472 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
473 return -EIO;
474 goto out_retry;
475 }
476 return ret;
477out_retry:
a2c0b9e2
TM		 478 if (ret == 0)
479 exception->retry = 1;
480 return ret;
65de872e
TM		 481}
482
037fc980
TM		 483static int
484nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
485 int errorcode, struct nfs4_exception *exception)
486{
487 struct nfs_client *clp = server->nfs_client;
488 int ret;
489
490 ret = nfs4_do_handle_exception(server, errorcode, exception);
491 if (exception->delay) {
492 rpc_delay(task, nfs4_update_delay(&exception->timeout));
493 goto out_retry;
494 }
495 if (exception->recovering) {
496 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
497 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
498 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
499 goto out_retry;
500 }
519ae255 501 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
037fc980
TM		 502 ret = -EIO;
503 return ret;
504out_retry:
a2c0b9e2
TM		 505 if (ret == 0)
506 exception->retry = 1;
507 return ret;
65de872e
TM		 508}
509
037fc980
TM		 510static int
511nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
512 struct nfs4_state *state, long *timeout)
513{
514 struct nfs4_exception exception = {
515 .state = state,
516 };
517
518 if (task->tk_status >= 0)
519 return 0;
520 if (timeout)
521 exception.timeout = *timeout;
522 task->tk_status = nfs4_async_handle_exception(task, server,
523 task->tk_status,
524 &exception);
525 if (exception.delay && timeout)
526 *timeout = exception.timeout;
527 if (exception.retry)
528 return -EAGAIN;
529 return 0;
530}
531
a5250def
WAA		 532/*
533 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
534 * or 'false' otherwise.
535 */
536static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
537{
538 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
539
540 if (flavor == RPC_AUTH_GSS_KRB5I ||
541 flavor == RPC_AUTH_GSS_KRB5P)
542 return true;
543
544 return false;
545}
65de872e 546
452e9352 547static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 548{
1da177e4
LT		 549 spin_lock(&clp->cl_lock);
550 if (time_before(clp->cl_last_renewal,timestamp))
551 clp->cl_last_renewal = timestamp;
552 spin_unlock(&clp->cl_lock);
553}
554
452e9352
TM		 555static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
556{
be824167
TM		 557 struct nfs_client *clp = server->nfs_client;
558
559 if (!nfs4_has_session(clp))
560 do_renew_lease(clp, timestamp);
452e9352
TM		 561}
562
2a3eb2b9
CL		 563struct nfs4_call_sync_data {
564 const struct nfs_server *seq_server;
565 struct nfs4_sequence_args *seq_args;
566 struct nfs4_sequence_res *seq_res;
567};
568
be3a5d23
TM		 569void nfs4_init_sequence(struct nfs4_sequence_args *args,
570 struct nfs4_sequence_res *res, int cache_reply)
a9c92d6b
CL		 571{
572 args->sa_slot = NULL;
573 args->sa_cache_this = cache_reply;
574 args->sa_privileged = 0;
575
576 res->sr_slot = NULL;
577}
578
579static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
580{
581 args->sa_privileged = 1;
582}
583
cb04ad2a
PT		 584int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
585 struct nfs4_sequence_args *args,
586 struct nfs4_sequence_res *res,
587 struct rpc_task *task)
3bd2384a 588{
3bd2384a
CL		 589 struct nfs4_slot *slot;
590
591 /* slot already allocated? */
592 if (res->sr_slot != NULL)
593 goto out_start;
594
595 spin_lock(&tbl->slot_tbl_lock);
596 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
597 goto out_sleep;
598
599 slot = nfs4_alloc_slot(tbl);
600 if (IS_ERR(slot)) {
601 if (slot == ERR_PTR(-ENOMEM))
602 task->tk_timeout = HZ >> 2;
603 goto out_sleep;
604 }
605 spin_unlock(&tbl->slot_tbl_lock);
606
607 args->sa_slot = slot;
608 res->sr_slot = slot;
609
610out_start:
611 rpc_call_start(task);
612 return 0;
613
614out_sleep:
615 if (args->sa_privileged)
616 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
617 NULL, RPC_PRIORITY_PRIVILEGED);
618 else
619 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
620 spin_unlock(&tbl->slot_tbl_lock);
621 return -EAGAIN;
622}
cb04ad2a 623EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
3bd2384a
CL		 624
625static int nfs40_sequence_done(struct rpc_task *task,
626 struct nfs4_sequence_res *res)
627{
628 struct nfs4_slot *slot = res->sr_slot;
629 struct nfs4_slot_table *tbl;
630
cab92c19 631 if (slot == NULL)
3bd2384a
CL		 632 goto out;
633
634 tbl = slot->table;
635 spin_lock(&tbl->slot_tbl_lock);
636 if (!nfs41_wake_and_assign_slot(tbl, slot))
637 nfs4_free_slot(tbl, slot);
638 spin_unlock(&tbl->slot_tbl_lock);
639
640 res->sr_slot = NULL;
641out:
642 return 1;
643}
644
cccef3b9
AA		 645#if defined(CONFIG_NFS_V4_1)
646
d185a334 647static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 648{
e3725ec0 649 struct nfs4_session *session;
13615871 650 struct nfs4_slot_table *tbl;
a13ce7c6 651 struct nfs4_slot *slot = res->sr_slot;
c10e4498 652 bool send_new_highest_used_slotid = false;
13615871 653
a13ce7c6 654 tbl = slot->table;
e3725ec0 655 session = tbl->session;
ea028ac9 656
35dc1d74 657 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 658 /* Be nice to the server: try to ensure that the last transmitted
659 * value for highest_user_slotid <= target_highest_slotid
660 */
661 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
662 send_new_highest_used_slotid = true;
663
a13ce7c6 664 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 665 send_new_highest_used_slotid = false;
666 goto out_unlock;
667 }
a13ce7c6 668 nfs4_free_slot(tbl, slot);
c10e4498
TM		 669
670 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
671 send_new_highest_used_slotid = false;
b75ad4cd 672out_unlock:
35dc1d74 673 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 674 res->sr_slot = NULL;
c10e4498 675 if (send_new_highest_used_slotid)
3f10a6af 676 nfs41_notify_server(session->clp);
13615871
AA		 677}
678
f9c96fcc 679int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 680{
e3725ec0 681 struct nfs4_session *session;
a13ce7c6 682 struct nfs4_slot *slot = res->sr_slot;
14516c3a 683 struct nfs_client *clp;
ac20d163 684 bool interrupted = false;
85563073 685 int ret = 1;
b0df806c 686
a13ce7c6
TM		 687 if (slot == NULL)
688 goto out_noaction;
468f8613
BS		 689 /* don't increment the sequence number if the task wasn't sent */
690 if (!RPC_WAS_SENT(task))
b0df806c
AA		 691 goto out;
692
e3725ec0 693 session = slot->table->session;
933602e3 694
ac20d163
TM		 695 if (slot->interrupted) {
696 slot->interrupted = 0;
697 interrupted = true;
698 }
699
2f92ae34 700 trace_nfs4_sequence_done(session, res);
691daf3b 701 /* Check the SEQUENCE operation status */
14516c3a
TM		 702 switch (res->sr_status) {
703 case 0:
b0df806c 704 /* Update the slot's sequence and clientid lease timer */
933602e3 705 ++slot->seq_nr;
e3725ec0 706 clp = session->clp;
8e63b6a8 707 do_renew_lease(clp, res->sr_timestamp);
0629e370 708 /* Check sequence flags */
b15c7cdd 709 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
464ee9f9 710 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 711 break;
ac20d163
TM		 712 case 1:
713 /*
714 * sr_status remains 1 if an RPC level error occurred.
715 * The server may or may not have processed the sequence
716 * operation..
717 * Mark the slot as having hosted an interrupted RPC call.
718 */
719 slot->interrupted = 1;
720 goto out;
14516c3a
TM		 721 case -NFS4ERR_DELAY:
722 /* The server detected a resend of the RPC call and
723 * returned NFS4ERR_DELAY as per Section 2.10.6.2
724 * of RFC5661.
725 */
df2fabff 726 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 727 __func__,
df2fabff 728 slot->slot_nr,
933602e3 729 slot->seq_nr);
14516c3a 730 goto out_retry;
85563073
TM		 731 case -NFS4ERR_BADSLOT:
732 /*
733 * The slot id we used was probably retired. Try again
734 * using a different slot id.
735 */
e8794440
TM		 736 goto retry_nowait;
737 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 738 /*
739 * Was the last operation on this sequence interrupted?
740 * If so, retry after bumping the sequence number.
741 */
742 if (interrupted) {
743 ++slot->seq_nr;
744 goto retry_nowait;
745 }
e8794440
TM		 746 /*
747 * Could this slot have been previously retired?
748 * If so, then the server may be expecting seq_nr = 1!
749 */
8e63b6a8
TM		 750 if (slot->seq_nr != 1) {
751 slot->seq_nr = 1;
752 goto retry_nowait;
753 }
754 break;
e8794440
TM		 755 case -NFS4ERR_SEQ_FALSE_RETRY:
756 ++slot->seq_nr;
757 goto retry_nowait;
14516c3a
TM		 758 default:
759 /* Just update the slot sequence no. */
933602e3 760 ++slot->seq_nr;
b0df806c
AA		 761 }
762out:
763 /* The session may be reset by one of the error handlers. */
764 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 765 nfs41_sequence_free_slot(res);
a13ce7c6 766out_noaction:
85563073 767 return ret;
e8794440
TM		 768retry_nowait:
769 if (rpc_restart_call_prepare(task)) {
770 task->tk_status = 0;
771 ret = 0;
772 }
773 goto out;
14516c3a 774out_retry:
d05dd4e9 775 if (!rpc_restart_call(task))
14516c3a
TM		 776 goto out;
777 rpc_delay(task, NFS4_POLL_RETRY_MAX);
778 return 0;
b0df806c 779}
f9c96fcc 780EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 781
2c4b131d 782int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 783{
e3725ec0 784 if (res->sr_slot == NULL)
14516c3a 785 return 1;
3bd2384a
CL		 786 if (!res->sr_slot->table->session)
787 return nfs40_sequence_done(task, res);
14516c3a 788 return nfs41_sequence_done(task, res);
df896455 789}
2c4b131d 790EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 791
dc70d7b3 792int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 793 struct nfs4_sequence_args *args,
794 struct nfs4_sequence_res *res,
ce5039c1
AA		 795 struct rpc_task *task)
796{
fbcd4abc
AA		 797 struct nfs4_slot *slot;
798 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 799
800 dprintk("--> %s\n", __func__);
ce5039c1 801 /* slot already allocated? */
dfb4f309 802 if (res->sr_slot != NULL)
d9afbd1b 803 goto out_success;
ce5039c1 804
fbcd4abc
AA		 805 tbl = &session->fc_slot_table;
806
69d206b5
TM		 807 task->tk_timeout = 0;
808
fbcd4abc 809 spin_lock(&tbl->slot_tbl_lock);
774d5f14 810 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 811 !args->sa_privileged) {
0b1c8fc4 812 /* The state manager will wait until the slot table is empty */
0b1c8fc4 813 dprintk("%s session is draining\n", __func__);
7b939a3f 814 goto out_sleep;
689cf5c1
AB		 815 }
816
2dc03b7f 817 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 818 if (IS_ERR(slot)) {
819 /* If out of memory, try again in 1/4 second */
820 if (slot == ERR_PTR(-ENOMEM))
821 task->tk_timeout = HZ >> 2;
fbcd4abc 822 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 823 goto out_sleep;
fbcd4abc
AA		 824 }
825 spin_unlock(&tbl->slot_tbl_lock);
826
2b2fa717 827 args->sa_slot = slot;
fbcd4abc 828
e8d92382 829 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 830 slot->slot_nr, slot->seq_nr);
fbcd4abc 831
dfb4f309 832 res->sr_slot = slot;
8e63b6a8 833 res->sr_timestamp = jiffies;
2a6e26cd 834 res->sr_status_flags = 0;
fbcd4abc
AA		 835 /*
836 * sr_status is only set in decode_sequence, and so will remain
837 * set to 1 if an rpc level failure occurs.
838 */
839 res->sr_status = 1;
2f92ae34 840 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 841out_success:
842 rpc_call_start(task);
ce5039c1 843 return 0;
7b939a3f 844out_sleep:
8fe72bac
TM		 845 /* Privileged tasks are queued with top priority */
846 if (args->sa_privileged)
1e1093c7
TM		 847 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
848 NULL, RPC_PRIORITY_PRIVILEGED);
849 else
850 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 851 spin_unlock(&tbl->slot_tbl_lock);
852 return -EAGAIN;
ce5039c1 853}
dc70d7b3 854EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 855
5a580e0a
CL		 856static int nfs4_setup_sequence(const struct nfs_server *server,
857 struct nfs4_sequence_args *args,
858 struct nfs4_sequence_res *res,
859 struct rpc_task *task)
ce5039c1 860{
035168ab 861 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 862 int ret = 0;
863
3bd2384a 864 if (!session)
cb04ad2a
PT		 865 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
866 args, res, task);
035168ab 867
e8d92382 868 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 869 __func__, session->clp, session, res->sr_slot ?
e8d92382 870 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 871
9d12b216 872 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 873
ce5039c1
AA		 874 dprintk("<-- %s status=%d\n", __func__, ret);
875 return ret;
876}
877
ce5039c1
AA		 878static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
879{
2a3eb2b9 880 struct nfs4_call_sync_data *data = calldata;
6ba7db34 881 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 882
035168ab
TM		 883 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
884
d9afbd1b 885 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 886}
887
69ab40c4
AA		 888static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
889{
2a3eb2b9 890 struct nfs4_call_sync_data *data = calldata;
69ab40c4 891
14516c3a 892 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 893}
894
17280175 895static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 896 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 897 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 898};
899
3bd2384a
CL		 900#else /* !CONFIG_NFS_V4_1 */
901
9915ea7e
CL		 902static int nfs4_setup_sequence(const struct nfs_server *server,
903 struct nfs4_sequence_args *args,
904 struct nfs4_sequence_res *res,
905 struct rpc_task *task)
906{
cb04ad2a
PT		 907 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
908 args, res, task);
9915ea7e
CL		 909}
910
2c4b131d
PT		 911int nfs4_sequence_done(struct rpc_task *task,
912 struct nfs4_sequence_res *res)
9915ea7e 913{
3bd2384a 914 return nfs40_sequence_done(task, res);
9915ea7e 915}
2c4b131d 916EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 917
918#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 919
920static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
921{
922 struct nfs4_call_sync_data *data = calldata;
923 nfs4_setup_sequence(data->seq_server,
924 data->seq_args, data->seq_res, task);
925}
926
927static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
928{
929 struct nfs4_call_sync_data *data = calldata;
930 nfs4_sequence_done(task, data->seq_res);
931}
932
933static const struct rpc_call_ops nfs40_call_sync_ops = {
934 .rpc_call_prepare = nfs40_call_sync_prepare,
935 .rpc_call_done = nfs40_call_sync_done,
936};
937
7c513058
BS		 938static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
939 struct nfs_server *server,
ce5039c1
AA		 940 struct rpc_message *msg,
941 struct nfs4_sequence_args *args,
8fe72bac 942 struct nfs4_sequence_res *res)
ce5039c1
AA		 943{
944 int ret;
945 struct rpc_task *task;
9915ea7e 946 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 947 struct nfs4_call_sync_data data = {
035168ab 948 .seq_server = server,
ce5039c1
AA		 949 .seq_args = args,
950 .seq_res = res,
ce5039c1
AA		 951 };
952 struct rpc_task_setup task_setup = {
7c513058 953 .rpc_client = clnt,
ce5039c1 954 .rpc_message = msg,
9915ea7e 955 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 956 .callback_data = &data
957 };
958
ce5039c1
AA		 959 task = rpc_run_task(&task_setup);
960 if (IS_ERR(task))
961 ret = PTR_ERR(task);
962 else {
963 ret = task->tk_status;
964 rpc_put_task(task);
965 }
966 return ret;
967}
968
7c513058
BS		 969int nfs4_call_sync(struct rpc_clnt *clnt,
970 struct nfs_server *server,
e73b83f2
BS		 971 struct rpc_message *msg,
972 struct nfs4_sequence_args *args,
973 struct nfs4_sequence_res *res,
974 int cache_reply)
975{
a9c92d6b 976 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 977 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 978}
cccef3b9 979
38478b24 980static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 981{
38478b24 982 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 983
38478b24 984 spin_lock(&dir->i_lock);
359d7d1c 985 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 986 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 987 nfs_force_lookup_revalidate(dir);
a9a4a87a 988 dir->i_version = cinfo->after;
3235b403 989 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
de242c0b 990 nfs_fscache_invalidate(dir);
38478b24 991 spin_unlock(&dir->i_lock);
1da177e4
LT		 992}
993
e56e0b78 994struct nfs4_opendata {
c6d00e63 995 struct kref kref;
e56e0b78
TM		 996 struct nfs_openargs o_arg;
997 struct nfs_openres o_res;
cdd4e68b
TM		 998 struct nfs_open_confirmargs c_arg;
999 struct nfs_open_confirmres c_res;
6926afd1
TM		 1000 struct nfs4_string owner_name;
1001 struct nfs4_string group_name;
a49c2691 1002 struct nfs4_label *a_label;
e56e0b78 1003 struct nfs_fattr f_attr;
1775fd3e 1004 struct nfs4_label *f_label;
e56e0b78 1005 struct dentry *dir;
82a2c1b7 1006 struct dentry *dentry;
e56e0b78 1007 struct nfs4_state_owner *owner;
aac00a8d 1008 struct nfs4_state *state;
e56e0b78 1009 struct iattr attrs;
26e976a8 1010 unsigned long timestamp;
3e309914 1011 unsigned int rpc_done : 1;
5bc2afc2 1012 unsigned int file_created : 1;
bdeca1b7 1013 unsigned int is_recover : 1;
24ac23ab
TM		 1014 int rpc_status;
1015 int cancelled;
e56e0b78
TM		 1016};
1017
49f9a0fa
TM		 1018static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1019 int err, struct nfs4_exception *exception)
1020{
1021 if (err != -EINVAL)
1022 return false;
1023 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1024 return false;
1025 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1026 exception->retry = 1;
1027 return true;
1028}
1029
6ae37339
TM		 1030static u32
1031nfs4_map_atomic_open_share(struct nfs_server *server,
1032 fmode_t fmode, int openflags)
1033{
1034 u32 res = 0;
1035
1036 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1037 case FMODE_READ:
1038 res = NFS4_SHARE_ACCESS_READ;
1039 break;
1040 case FMODE_WRITE:
1041 res = NFS4_SHARE_ACCESS_WRITE;
1042 break;
1043 case FMODE_READ|FMODE_WRITE:
1044 res = NFS4_SHARE_ACCESS_BOTH;
1045 }
1046 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1047 goto out;
1048 /* Want no delegation if we're using O_DIRECT */
1049 if (openflags & O_DIRECT)
1050 res |= NFS4_SHARE_WANT_NO_DELEG;
1051out:
1052 return res;
1053}
1054
49f9a0fa
TM		 1055static enum open_claim_type4
1056nfs4_map_atomic_open_claim(struct nfs_server *server,
1057 enum open_claim_type4 claim)
1058{
1059 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1060 return claim;
1061 switch (claim) {
1062 default:
1063 return claim;
1064 case NFS4_OPEN_CLAIM_FH:
1065 return NFS4_OPEN_CLAIM_NULL;
1066 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1067 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1068 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1069 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1070 }
1071}
2ced46c2
TM		 1072
1073static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1074{
1075 p->o_res.f_attr = &p->f_attr;
1775fd3e 1076 p->o_res.f_label = p->f_label;
c1d51931
TM		 1077 p->o_res.seqid = p->o_arg.seqid;
1078 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 1079 p->o_res.server = p->o_arg.server;
5f657530 1080 p->o_res.access_request = p->o_arg.access;
2ced46c2 1081 nfs_fattr_init(&p->f_attr);
6926afd1 1082 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 1083}
1084
82a2c1b7 1085static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 1086 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 1087 const struct iattr *attrs,
1775fd3e 1088 struct nfs4_label *label,
4a1c0893 1089 enum open_claim_type4 claim,
8535b2be 1090 gfp_t gfp_mask)
e56e0b78 1091{
82a2c1b7 1092 struct dentry *parent = dget_parent(dentry);
2b0143b5 1093 struct inode *dir = d_inode(parent);
e56e0b78 1094 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1095 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 1096 struct nfs4_opendata *p;
1097
8535b2be 1098 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1099 if (p == NULL)
1100 goto err;
14c43f76
DQ		 1101
1102 p->f_label = nfs4_label_alloc(server, gfp_mask);
1103 if (IS_ERR(p->f_label))
1104 goto err_free_p;
1105
a49c2691
KM		 1106 p->a_label = nfs4_label_alloc(server, gfp_mask);
1107 if (IS_ERR(p->a_label))
1108 goto err_free_f;
1109
63f5f796
TM		 1110 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1111 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1112 if (IS_ERR(p->o_arg.seqid))
14c43f76 1113 goto err_free_label;
82a2c1b7
AV		 1114 nfs_sb_active(dentry->d_sb);
1115 p->dentry = dget(dentry);
e56e0b78
TM		 1116 p->dir = parent;
1117 p->owner = sp;
1118 atomic_inc(&sp->so_count);
dc0b027d
TM		 1119 p->o_arg.open_flags = flags;
1120 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
6ae37339
TM		 1121 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1122 fmode, flags);
ae2bb032
WAA		 1123 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1124 * will return permission denied for all bits until close */
1125 if (!(flags & O_EXCL)) {
1126 /* ask server to check for all possible rights as results
1127 * are cached */
1128 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1129 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1130 }
7539bbab 1131 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1132 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1133 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1134 p->o_arg.name = &dentry->d_name;
e56e0b78 1135 p->o_arg.server = server;
aa9c2669 1136 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1137 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
a49c2691 1138 p->o_arg.label = nfs4_label_copy(p->a_label, label);
49f9a0fa
TM		 1139 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1140 switch (p->o_arg.claim) {
4a1c0893
TM		 1141 case NFS4_OPEN_CLAIM_NULL:
1142 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1143 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1144 p->o_arg.fh = NFS_FH(dir);
1145 break;
1146 case NFS4_OPEN_CLAIM_PREVIOUS:
1147 case NFS4_OPEN_CLAIM_FH:
1148 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1149 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1150 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1151 }
536e43d1 1152 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1153 __u32 verf[2];
d77d76ff 1154
e56e0b78
TM		 1155 p->o_arg.u.attrs = &p->attrs;
1156 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1157
1158 verf[0] = jiffies;
1159 verf[1] = current->pid;
1160 memcpy(p->o_arg.u.verifier.data, verf,
1161 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1162 }
cdd4e68b
TM		 1163 p->c_arg.fh = &p->o_res.fh;
1164 p->c_arg.stateid = &p->o_res.stateid;
1165 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1166 nfs4_init_opendata_res(p);
c6d00e63 1167 kref_init(&p->kref);
e56e0b78 1168 return p;
14c43f76
DQ		 1169
1170err_free_label:
a49c2691
KM		 1171 nfs4_label_free(p->a_label);
1172err_free_f:
14c43f76
DQ		 1173 nfs4_label_free(p->f_label);
1174err_free_p:
e56e0b78
TM		 1175 kfree(p);
1176err:
1177 dput(parent);
1178 return NULL;
1179}
1180
c6d00e63 1181static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1182{
c6d00e63
TM		 1183 struct nfs4_opendata *p = container_of(kref,
1184 struct nfs4_opendata, kref);
82a2c1b7 1185 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1186
1187 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1188 if (p->state != NULL)
1189 nfs4_put_open_state(p->state);
c6d00e63 1190 nfs4_put_state_owner(p->owner);
14c43f76 1191
a49c2691 1192 nfs4_label_free(p->a_label);
14c43f76
DQ		 1193 nfs4_label_free(p->f_label);
1194
c6d00e63 1195 dput(p->dir);
82a2c1b7
AV		 1196 dput(p->dentry);
1197 nfs_sb_deactive(sb);
6926afd1 1198 nfs_fattr_free_names(&p->f_attr);
e911b815 1199 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1200 kfree(p);
1201}
1202
1203static void nfs4_opendata_put(struct nfs4_opendata *p)
1204{
1205 if (p != NULL)
1206 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1207}
1208
06f814a3
TM		 1209static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1210{
06f814a3
TM		 1211 int ret;
1212
06f814a3 1213 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1214 return ret;
1215}
1216
24311f88
TM		 1217static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1218 fmode_t fmode)
1219{
1220 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1221 case FMODE_READ|FMODE_WRITE:
1222 return state->n_rdwr != 0;
1223 case FMODE_WRITE:
1224 return state->n_wronly != 0;
1225 case FMODE_READ:
1226 return state->n_rdonly != 0;
1227 }
1228 WARN_ON_ONCE(1);
1229 return false;
1230}
1231
dc0b027d 1232static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1233{
1234 int ret = 0;
dc0b027d 1235
536e43d1 1236 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1237 goto out;
1238 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1239 case FMODE_READ:
88069f77
TM		 1240 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1241 && state->n_rdonly != 0;
6ee41268
TM		 1242 break;
1243 case FMODE_WRITE:
88069f77
TM		 1244 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1245 && state->n_wronly != 0;
6ee41268
TM		 1246 break;
1247 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1248 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1249 && state->n_rdwr != 0;
6ee41268 1250 }
dc0b027d 1251out:
6ee41268
TM		 1252 return ret;
1253}
1254
2a606188
TM		 1255static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1256 enum open_claim_type4 claim)
aac00a8d 1257{
652f89f6
TM		 1258 if (delegation == NULL)
1259 return 0;
dc0b027d 1260 if ((delegation->type & fmode) != fmode)
aac00a8d 1261 return 0;
d25be546
TM		 1262 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1263 return 0;
2a606188
TM		 1264 switch (claim) {
1265 case NFS4_OPEN_CLAIM_NULL:
1266 case NFS4_OPEN_CLAIM_FH:
1267 break;
1268 case NFS4_OPEN_CLAIM_PREVIOUS:
1269 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1270 break;
1271 default:
1272 return 0;
1273 }
b7391f44 1274 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1275 return 1;
1276}
1277
dc0b027d 1278static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1279{
dc0b027d 1280 switch (fmode) {
e7616923
TM		 1281 case FMODE_WRITE:
1282 state->n_wronly++;
1283 break;
1284 case FMODE_READ:
1285 state->n_rdonly++;
1286 break;
1287 case FMODE_READ|FMODE_WRITE:
1288 state->n_rdwr++;
1289 }
dc0b027d 1290 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1291}
1292
4f14c194
TM		 1293static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1294{
1295 struct nfs_client *clp = state->owner->so_server->nfs_client;
1296 bool need_recover = false;
1297
1298 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1299 need_recover = true;
1300 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1301 need_recover = true;
1302 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1303 need_recover = true;
1304 if (need_recover)
1305 nfs4_state_mark_reclaim_nograce(clp, state);
1306}
1307
e999e80e
TM		 1308static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1309 nfs4_stateid *stateid)
1310{
1311 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1312 return true;
4f14c194
TM		 1313 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1314 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1315 return true;
4f14c194 1316 }
e999e80e
TM		 1317 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1318 return true;
1319 return false;
1320}
1321
f95549cf
TM		 1322static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1323{
3c38cbe2
TM		 1324 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1325 return;
f95549cf
TM		 1326 if (state->n_wronly)
1327 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1328 if (state->n_rdonly)
1329 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1330 if (state->n_rdwr)
1331 set_bit(NFS_O_RDWR_STATE, &state->flags);
3c38cbe2 1332 set_bit(NFS_OPEN_STATE, &state->flags);
f95549cf
TM		 1333}
1334
226056c5 1335static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
4a1e2feb 1336 nfs4_stateid *arg_stateid,
226056c5 1337 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1338{
226056c5
TM		 1339 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1340 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1341 case FMODE_WRITE:
1342 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1343 break;
1344 case FMODE_READ:
1345 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1346 break;
1347 case 0:
1348 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1349 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1350 clear_bit(NFS_OPEN_STATE, &state->flags);
1351 }
1352 if (stateid == NULL)
1353 return;
f95549cf 1354 /* Handle races with OPEN */
4a1e2feb
TM		 1355 if (!nfs4_stateid_match_other(arg_stateid, &state->open_stateid) ||
1356 (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1357 !nfs4_stateid_is_newer(stateid, &state->open_stateid))) {
f95549cf 1358 nfs_resync_open_stateid_locked(state);
226056c5 1359 return;
f95549cf 1360 }
003707c7 1361 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1362 nfs4_stateid_copy(&state->stateid, stateid);
1363 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1364}
1365
4a1e2feb
TM		 1366static void nfs_clear_open_stateid(struct nfs4_state *state,
1367 nfs4_stateid *arg_stateid,
1368 nfs4_stateid *stateid, fmode_t fmode)
226056c5
TM		 1369{
1370 write_seqlock(&state->seqlock);
4a1e2feb 1371 nfs_clear_open_stateid_locked(state, arg_stateid, stateid, fmode);
226056c5 1372 write_sequnlock(&state->seqlock);
4f14c194
TM		 1373 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1374 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1375}
1376
dc0b027d 1377static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1378{
dc0b027d 1379 switch (fmode) {
003707c7
TM		 1380 case FMODE_READ:
1381 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1382 break;
1383 case FMODE_WRITE:
1384 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1385 break;
1386 case FMODE_READ|FMODE_WRITE:
1387 set_bit(NFS_O_RDWR_STATE, &state->flags);
1388 }
e999e80e
TM		 1389 if (!nfs_need_update_open_stateid(state, stateid))
1390 return;
1391 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1392 nfs4_stateid_copy(&state->stateid, stateid);
1393 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1394}
1395
dc0b027d 1396static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1397{
8bda4e4c
TM		 1398 /*
1399 * Protect the call to nfs4_state_set_mode_locked and
1400 * serialise the stateid update
1401 */
361cad3c 1402 spin_lock(&state->owner->so_lock);
8bda4e4c 1403 write_seqlock(&state->seqlock);
003707c7 1404 if (deleg_stateid != NULL) {
f597c537 1405 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1406 set_bit(NFS_DELEGATED_STATE, &state->flags);
1407 }
1408 if (open_stateid != NULL)
dc0b027d 1409 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c 1410 write_sequnlock(&state->seqlock);
dc0b027d 1411 update_open_stateflags(state, fmode);
ec073428 1412 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1413}
1414
dc0b027d 1415static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1416{
1417 struct nfs_inode *nfsi = NFS_I(state->inode);
1418 struct nfs_delegation *deleg_cur;
1419 int ret = 0;
1420
dc0b027d 1421 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1422
1423 rcu_read_lock();
1424 deleg_cur = rcu_dereference(nfsi->delegation);
1425 if (deleg_cur == NULL)
1426 goto no_delegation;
1427
1428 spin_lock(&deleg_cur->lock);
17f26b12 1429 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1430 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1431 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1432 goto no_delegation_unlock;
1433
1434 if (delegation == NULL)
1435 delegation = &deleg_cur->stateid;
f597c537 1436 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1437 goto no_delegation_unlock;
1438
b7391f44 1439 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1440 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1441 ret = 1;
1442no_delegation_unlock:
1443 spin_unlock(&deleg_cur->lock);
1444no_delegation:
1445 rcu_read_unlock();
1446
1447 if (!ret && open_stateid != NULL) {
dc0b027d 1448 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1449 ret = 1;
1450 }
4f14c194
TM		 1451 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1452 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1453
1454 return ret;
1455}
1456
39071e6f
TM		 1457static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1458 const nfs4_stateid *stateid)
1459{
1460 struct nfs4_state *state = lsp->ls_state;
1461 bool ret = false;
1462
1463 spin_lock(&state->state_lock);
1464 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1465 goto out_noupdate;
1466 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1467 goto out_noupdate;
1468 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1469 ret = true;
1470out_noupdate:
1471 spin_unlock(&state->state_lock);
1472 return ret;
1473}
34310430 1474
dc0b027d 1475static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1476{
1477 struct nfs_delegation *delegation;
1478
1479 rcu_read_lock();
1480 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1481 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1482 rcu_read_unlock();
1483 return;
1484 }
1485 rcu_read_unlock();
57ec14c5 1486 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1487}
1488
6ee41268 1489static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1490{
1491 struct nfs4_state *state = opendata->state;
1492 struct nfs_inode *nfsi = NFS_I(state->inode);
1493 struct nfs_delegation *delegation;
f448badd 1494 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1495 fmode_t fmode = opendata->o_arg.fmode;
2a606188 1496 enum open_claim_type4 claim = opendata->o_arg.claim;
aac00a8d
TM		 1497 nfs4_stateid stateid;
1498 int ret = -EAGAIN;
1499
aac00a8d 1500 for (;;) {
61beef75 1501 spin_lock(&state->owner->so_lock);
dc0b027d 1502 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1503 update_open_stateflags(state, fmode);
6ee41268 1504 spin_unlock(&state->owner->so_lock);
61beef75 1505 goto out_return_state;
6ee41268 1506 }
61beef75 1507 spin_unlock(&state->owner->so_lock);
34310430
TM		 1508 rcu_read_lock();
1509 delegation = rcu_dereference(nfsi->delegation);
2a606188 1510 if (!can_open_delegated(delegation, fmode, claim)) {
34310430 1511 rcu_read_unlock();
aac00a8d 1512 break;
34310430 1513 }
aac00a8d 1514 /* Save the delegation */
f597c537 1515 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1516 rcu_read_unlock();
fa332941 1517 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1518 if (!opendata->is_recover) {
1519 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1520 if (ret != 0)
1521 goto out;
1522 }
aac00a8d 1523 ret = -EAGAIN;
34310430
TM		 1524
1525 /* Try to update the stateid using the delegation */
dc0b027d 1526 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1527 goto out_return_state;
aac00a8d 1528 }
aac00a8d
TM		 1529out:
1530 return ERR_PTR(ret);
1531out_return_state:
1532 atomic_inc(&state->count);
1533 return state;
1534}
1535
e23008ec
AA		 1536static void
1537nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1538{
1539 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1540 struct nfs_delegation *delegation;
1541 int delegation_flags = 0;
1542
1543 rcu_read_lock();
1544 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1545 if (delegation)
1546 delegation_flags = delegation->flags;
1547 rcu_read_unlock();
72d79ff8
TM		 1548 switch (data->o_arg.claim) {
1549 default:
1550 break;
1551 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1552 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
e23008ec
AA		 1553 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1554 "returning a delegation for "
1555 "OPEN(CLAIM_DELEGATE_CUR)\n",
1556 clp->cl_hostname);
72d79ff8
TM		 1557 return;
1558 }
1559 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
e23008ec
AA		 1560 nfs_inode_set_delegation(state->inode,
1561 data->owner->so_cred,
1562 &data->o_res);
1563 else
1564 nfs_inode_reclaim_delegation(state->inode,
1565 data->owner->so_cred,
1566 &data->o_res);
1567}
1568
1569/*
1570 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1571 * and update the nfs4_state.
1572 */
1573static struct nfs4_state *
1574_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1575{
1576 struct inode *inode = data->state->inode;
1577 struct nfs4_state *state = data->state;
1578 int ret;
1579
d2bfda2e
WAA		 1580 if (!data->rpc_done) {
1581 if (data->rpc_status) {
1582 ret = data->rpc_status;
1583 goto err;
1584 }
1585 /* cached opens have already been processed */
1586 goto update;
e23008ec
AA		 1587 }
1588
e23008ec
AA		 1589 ret = nfs_refresh_inode(inode, &data->f_attr);
1590 if (ret)
1591 goto err;
1592
1593 if (data->o_res.delegation_type != 0)
1594 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1595update:
e23008ec
AA		 1596 update_open_stateid(state, &data->o_res.stateid, NULL,
1597 data->o_arg.fmode);
d49f042a 1598 atomic_inc(&state->count);
e23008ec
AA		 1599
1600 return state;
1601err:
1602 return ERR_PTR(ret);
1603
1604}
1605
1606static struct nfs4_state *
1607_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1608{
1609 struct inode *inode;
1610 struct nfs4_state *state = NULL;
1b370bc2 1611 int ret;
24ac23ab 1612
aac00a8d 1613 if (!data->rpc_done) {
6ee41268 1614 state = nfs4_try_open_cached(data);
9759b0fb 1615 trace_nfs4_cached_open(data->state);
aac00a8d
TM		 1616 goto out;
1617 }
1618
1b370bc2 1619 ret = -EAGAIN;
24ac23ab 1620 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1621 goto err;
1775fd3e 1622 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1623 ret = PTR_ERR(inode);
03f28e3a 1624 if (IS_ERR(inode))
1b370bc2
TM		 1625 goto err;
1626 ret = -ENOMEM;
24ac23ab
TM		 1627 state = nfs4_get_open_state(inode, data->owner);
1628 if (state == NULL)
1b370bc2 1629 goto err_put_inode;
e23008ec
AA		 1630 if (data->o_res.delegation_type != 0)
1631 nfs4_opendata_check_deleg(data, state);
34310430 1632 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1633 data->o_arg.fmode);
24ac23ab 1634 iput(inode);
aac00a8d 1635out:
7aa262b5 1636 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1637 return state;
1b370bc2
TM		 1638err_put_inode:
1639 iput(inode);
1640err:
1641 return ERR_PTR(ret);
24ac23ab
TM		 1642}
1643
e23008ec
AA		 1644static struct nfs4_state *
1645nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1646{
1647 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1648 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1649 return _nfs4_opendata_to_nfs4_state(data);
1650}
1651
864472e9
TM		 1652static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1653{
1654 struct nfs_inode *nfsi = NFS_I(state->inode);
1655 struct nfs_open_context *ctx;
1656
1657 spin_lock(&state->inode->i_lock);
1658 list_for_each_entry(ctx, &nfsi->open_files, list) {
1659 if (ctx->state != state)
1660 continue;
1661 get_nfs_open_context(ctx);
1662 spin_unlock(&state->inode->i_lock);
1663 return ctx;
1664 }
1665 spin_unlock(&state->inode->i_lock);
1666 return ERR_PTR(-ENOENT);
1667}
1668
4a1c0893
TM		 1669static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1670 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1671{
1672 struct nfs4_opendata *opendata;
1673
4a1c0893 1674 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1675 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1676 if (opendata == NULL)
1677 return ERR_PTR(-ENOMEM);
1678 opendata->state = state;
1679 atomic_inc(&state->count);
1680 return opendata;
1681}
1682
24311f88
TM		 1683static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1684 fmode_t fmode)
864472e9 1685{
2ced46c2 1686 struct nfs4_state *newstate;
864472e9
TM		 1687 int ret;
1688
24311f88 1689 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
39f897fd 1690 return 0;
dc0b027d
TM		 1691 opendata->o_arg.open_flags = 0;
1692 opendata->o_arg.fmode = fmode;
be36e185
TM		 1693 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1694 NFS_SB(opendata->dentry->d_sb),
1695 fmode, 0);
2ced46c2
TM		 1696 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1697 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1698 nfs4_init_opendata_res(opendata);
b257957e 1699 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1700 if (ret != 0)
1701 return ret;
2ced46c2 1702 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1703 if (IS_ERR(newstate))
1704 return PTR_ERR(newstate);
24311f88
TM		 1705 if (newstate != opendata->state)
1706 ret = -ESTALE;
643168c2 1707 nfs4_close_state(newstate, fmode);
24311f88 1708 return ret;
864472e9
TM		 1709}
1710
1711static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1712{
864472e9
TM		 1713 int ret;
1714
4f14c194
TM		 1715 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1716 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1717 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1718 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1719 /* memory barrier prior to reading state->n_* */
2ced46c2 1720 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1721 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9 1722 smp_rmb();
24311f88
TM		 1723 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1724 if (ret != 0)
1725 return ret;
1726 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1727 if (ret != 0)
1728 return ret;
1729 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1730 if (ret != 0)
1731 return ret;
1ac7e2fd
TM		 1732 /*
1733 * We may have performed cached opens for all three recoveries.
1734 * Check if we need to update the current stateid.
1735 */
1736 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1737 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1738 write_seqlock(&state->seqlock);
1ac7e2fd 1739 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1740 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1741 write_sequnlock(&state->seqlock);
1ac7e2fd 1742 }
864472e9
TM		 1743 return 0;
1744}
1745
1da177e4
LT		 1746/*
1747 * OPEN_RECLAIM:
1748 * reclaim state on the server after a reboot.
1da177e4 1749 */
539cd03a 1750static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1751{
1ac7e2fd 1752 struct nfs_delegation *delegation;
864472e9 1753 struct nfs4_opendata *opendata;
dc0b027d 1754 fmode_t delegation_type = 0;
1da177e4
LT		 1755 int status;
1756
4a1c0893
TM		 1757 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1758 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1759 if (IS_ERR(opendata))
1760 return PTR_ERR(opendata);
1ac7e2fd
TM		 1761 rcu_read_lock();
1762 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1763 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1764 delegation_type = delegation->type;
1ac7e2fd 1765 rcu_read_unlock();
864472e9
TM		 1766 opendata->o_arg.u.delegation_type = delegation_type;
1767 status = nfs4_open_recover(opendata, state);
c6d00e63 1768 nfs4_opendata_put(opendata);
1da177e4
LT		 1769 return status;
1770}
1771
539cd03a 1772static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1773{
1774 struct nfs_server *server = NFS_SERVER(state->inode);
1775 struct nfs4_exception exception = { };
1776 int err;
1777 do {
539cd03a 1778 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1779 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1780 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1781 continue;
168667c4 1782 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1783 break;
1784 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1785 } while (exception.retry);
1786 return err;
1787}
1788
864472e9
TM		 1789static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1790{
1791 struct nfs_open_context *ctx;
1792 int ret;
1793
1794 ctx = nfs4_state_find_open_context(state);
1795 if (IS_ERR(ctx))
91876b13 1796 return -EAGAIN;
539cd03a 1797 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1798 put_nfs_open_context(ctx);
1799 return ret;
1800}
1801
db4f2e63 1802static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1803{
be76b5b6
TM		 1804 switch (err) {
1805 default:
1806 printk(KERN_ERR "NFS: %s: unhandled error "
1807 "%d.\n", __func__, err);
1808 case 0:
1809 case -ENOENT:
8eee52af 1810 case -EAGAIN:
be76b5b6
TM		 1811 case -ESTALE:
1812 break;
1813 case -NFS4ERR_BADSESSION:
1814 case -NFS4ERR_BADSLOT:
1815 case -NFS4ERR_BAD_HIGH_SLOT:
1816 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1817 case -NFS4ERR_DEADSESSION:
1818 set_bit(NFS_DELEGATED_STATE, &state->flags);
1819 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1820 return -EAGAIN;
1821 case -NFS4ERR_STALE_CLIENTID:
1822 case -NFS4ERR_STALE_STATEID:
1823 set_bit(NFS_DELEGATED_STATE, &state->flags);
1824 case -NFS4ERR_EXPIRED:
1825 /* Don't recall a delegation if it was lost */
1826 nfs4_schedule_lease_recovery(server->nfs_client);
1827 return -EAGAIN;
352297b9
CL		 1828 case -NFS4ERR_MOVED:
1829 nfs4_schedule_migration_recovery(server);
1830 return -EAGAIN;
8ef2f8d4
CL		 1831 case -NFS4ERR_LEASE_MOVED:
1832 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1833 return -EAGAIN;
be76b5b6
TM		 1834 case -NFS4ERR_DELEG_REVOKED:
1835 case -NFS4ERR_ADMIN_REVOKED:
1836 case -NFS4ERR_BAD_STATEID:
db4f2e63 1837 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1838 nfs_inode_find_state_and_recover(state->inode,
1839 stateid);
1840 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1841 return -EAGAIN;
be76b5b6
TM		 1842 case -NFS4ERR_DELAY:
1843 case -NFS4ERR_GRACE:
1844 set_bit(NFS_DELEGATED_STATE, &state->flags);
1845 ssleep(1);
1846 return -EAGAIN;
db4f2e63
TM		 1847 case -ENOMEM:
1848 case -NFS4ERR_DENIED:
1849 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1850 return 0;
be76b5b6 1851 }
1da177e4
LT		 1852 return err;
1853}
1854
24311f88
TM		 1855int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
1856 struct nfs4_state *state, const nfs4_stateid *stateid,
1857 fmode_t type)
db4f2e63
TM		 1858{
1859 struct nfs_server *server = NFS_SERVER(state->inode);
1860 struct nfs4_opendata *opendata;
24311f88 1861 int err = 0;
db4f2e63
TM		 1862
1863 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1864 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1865 if (IS_ERR(opendata))
1866 return PTR_ERR(opendata);
1867 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
5e99b532
JL		 1868 write_seqlock(&state->seqlock);
1869 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1870 write_sequnlock(&state->seqlock);
24311f88
TM		 1871 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1872 switch (type & (FMODE_READ|FMODE_WRITE)) {
1873 case FMODE_READ|FMODE_WRITE:
1874 case FMODE_WRITE:
1875 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1876 if (err)
1877 break;
1878 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1879 if (err)
1880 break;
1881 case FMODE_READ:
1882 err = nfs4_open_recover_helper(opendata, FMODE_READ);
1883 }
db4f2e63
TM		 1884 nfs4_opendata_put(opendata);
1885 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1886}
1887
be05c860
CL		 1888static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1889{
1890 struct nfs4_opendata *data = calldata;
1891
cb04ad2a
PT		 1892 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1893 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 1894}
1895
cdd4e68b
TM		 1896static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1897{
1898 struct nfs4_opendata *data = calldata;
1899
17ead6c8 1900 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1901
cdd4e68b 1902 data->rpc_status = task->tk_status;
26e976a8 1903 if (data->rpc_status == 0) {
f597c537 1904 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1905 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1906 renew_lease(data->o_res.server, data->timestamp);
3e309914 1907 data->rpc_done = 1;
26e976a8 1908 }
cdd4e68b
TM		 1909}
1910
1911static void nfs4_open_confirm_release(void *calldata)
1912{
1913 struct nfs4_opendata *data = calldata;
1914 struct nfs4_state *state = NULL;
1915
1916 /* If this request hasn't been cancelled, do nothing */
1917 if (data->cancelled == 0)
1918 goto out_free;
1919 /* In case of error, no cleanup! */
3e309914 1920 if (!data->rpc_done)
cdd4e68b 1921 goto out_free;
cdd4e68b 1922 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1923 if (!IS_ERR(state))
643168c2 1924 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1925out_free:
c6d00e63 1926 nfs4_opendata_put(data);
cdd4e68b
TM		 1927}
1928
1929static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1930 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1931 .rpc_call_done = nfs4_open_confirm_done,
1932 .rpc_release = nfs4_open_confirm_release,
1933};
1934
1935/*
1936 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1937 */
1938static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1939{
2b0143b5 1940 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 1941 struct rpc_task *task;
5138fde0
TM		 1942 struct rpc_message msg = {
1943 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1944 .rpc_argp = &data->c_arg,
1945 .rpc_resp = &data->c_res,
1946 .rpc_cred = data->owner->so_cred,
1947 };
c970aa85
TM		 1948 struct rpc_task_setup task_setup_data = {
1949 .rpc_client = server->client,
5138fde0 1950 .rpc_message = &msg,
c970aa85
TM		 1951 .callback_ops = &nfs4_open_confirm_ops,
1952 .callback_data = data,
101070ca 1953 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1954 .flags = RPC_TASK_ASYNC,
1955 };
1da177e4
LT		 1956 int status;
1957
17ead6c8 1958 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1959 kref_get(&data->kref);
3e309914
TM		 1960 data->rpc_done = 0;
1961 data->rpc_status = 0;
5138fde0 1962 data->timestamp = jiffies;
e92c1e0d
BC		 1963 if (data->is_recover)
1964 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
c970aa85 1965 task = rpc_run_task(&task_setup_data);
7a1218a2 1966 if (IS_ERR(task))
cdd4e68b 1967 return PTR_ERR(task);
cdd4e68b
TM		 1968 status = nfs4_wait_for_completion_rpc_task(task);
1969 if (status != 0) {
1970 data->cancelled = 1;
1971 smp_wmb();
1972 } else
1973 status = data->rpc_status;
e6b3c4db 1974 rpc_put_task(task);
1da177e4
LT		 1975 return status;
1976}
1977
24ac23ab 1978static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1979{
24ac23ab
TM		 1980 struct nfs4_opendata *data = calldata;
1981 struct nfs4_state_owner *sp = data->owner;
549b19cc 1982 struct nfs_client *clp = sp->so_server->nfs_client;
2a606188 1983 enum open_claim_type4 claim = data->o_arg.claim;
5138fde0 1984
24ac23ab 1985 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1986 goto out_wait;
aac00a8d
TM		 1987 /*
1988 * Check if we still need to send an OPEN call, or if we can use
1989 * a delegation instead.
1990 */
1991 if (data->state != NULL) {
1992 struct nfs_delegation *delegation;
1993
dc0b027d 1994 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1995 goto out_no_action;
aac00a8d
TM		 1996 rcu_read_lock();
1997 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2a606188 1998 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
652f89f6 1999 goto unlock_no_action;
aac00a8d
TM		 2000 rcu_read_unlock();
2001 }
95b72eb0 2002 /* Update client id. */
549b19cc 2003 data->o_arg.clientid = clp->cl_clientid;
2a606188
TM		 2004 switch (claim) {
2005 default:
2006 break;
8188df17
TM		 2007 case NFS4_OPEN_CLAIM_PREVIOUS:
2008 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2009 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 2010 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 2011 case NFS4_OPEN_CLAIM_FH:
2012 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 2013 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
2014 }
26e976a8 2015 data->timestamp = jiffies;
035168ab 2016 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 2017 &data->o_arg.seq_args,
2240a9e2
TM		 2018 &data->o_res.seq_res,
2019 task) != 0)
2020 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 2021
2022 /* Set the create mode (note dependency on the session type) */
2023 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2024 if (data->o_arg.open_flags & O_EXCL) {
2025 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2026 if (nfs4_has_persistent_session(clp))
2027 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2028 else if (clp->cl_mvops->minor_version > 0)
2029 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2030 }
6ee41268 2031 return;
652f89f6 2032unlock_no_action:
9759b0fb 2033 trace_nfs4_cached_open(data->state);
652f89f6 2034 rcu_read_unlock();
6ee41268
TM		 2035out_no_action:
2036 task->tk_action = NULL;
c8da19b9 2037out_wait:
b75ad4cd 2038 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 2039}
2040
24ac23ab
TM		 2041static void nfs4_open_done(struct rpc_task *task, void *calldata)
2042{
2043 struct nfs4_opendata *data = calldata;
1da177e4 2044
24ac23ab 2045 data->rpc_status = task->tk_status;
d898528c 2046
14516c3a
TM		 2047 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
2048 return;
d898528c 2049
24ac23ab 2050 if (task->tk_status == 0) {
807d66d8
TM		 2051 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2052 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 2053 case S_IFREG:
2054 break;
2055 case S_IFLNK:
24ac23ab 2056 data->rpc_status = -ELOOP;
6f926b5b
TM		 2057 break;
2058 case S_IFDIR:
24ac23ab 2059 data->rpc_status = -EISDIR;
6f926b5b
TM		 2060 break;
2061 default:
24ac23ab 2062 data->rpc_status = -ENOTDIR;
807d66d8 2063 }
6f926b5b 2064 }
26e976a8 2065 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 2066 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2067 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 2068 }
3e309914 2069 data->rpc_done = 1;
24ac23ab 2070}
6f926b5b 2071
24ac23ab
TM		 2072static void nfs4_open_release(void *calldata)
2073{
2074 struct nfs4_opendata *data = calldata;
2075 struct nfs4_state *state = NULL;
2076
2077 /* If this request hasn't been cancelled, do nothing */
2078 if (data->cancelled == 0)
2079 goto out_free;
2080 /* In case of error, no cleanup! */
3e309914 2081 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 2082 goto out_free;
2083 /* In case we need an open_confirm, no cleanup! */
2084 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2085 goto out_free;
24ac23ab 2086 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2087 if (!IS_ERR(state))
643168c2 2088 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 2089out_free:
c6d00e63 2090 nfs4_opendata_put(data);
24ac23ab
TM		 2091}
2092
2093static const struct rpc_call_ops nfs4_open_ops = {
2094 .rpc_call_prepare = nfs4_open_prepare,
2095 .rpc_call_done = nfs4_open_done,
2096 .rpc_release = nfs4_open_release,
2097};
2098
b257957e 2099static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab 2100{
2b0143b5 2101 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 2102 struct nfs_server *server = NFS_SERVER(dir);
2103 struct nfs_openargs *o_arg = &data->o_arg;
2104 struct nfs_openres *o_res = &data->o_res;
2105 struct rpc_task *task;
5138fde0
TM		 2106 struct rpc_message msg = {
2107 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2108 .rpc_argp = o_arg,
2109 .rpc_resp = o_res,
2110 .rpc_cred = data->owner->so_cred,
2111 };
c970aa85
TM		 2112 struct rpc_task_setup task_setup_data = {
2113 .rpc_client = server->client,
5138fde0 2114 .rpc_message = &msg,
c970aa85
TM		 2115 .callback_ops = &nfs4_open_ops,
2116 .callback_data = data,
101070ca 2117 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2118 .flags = RPC_TASK_ASYNC,
2119 };
24ac23ab
TM		 2120 int status;
2121
a9c92d6b 2122 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 2123 kref_get(&data->kref);
3e309914
TM		 2124 data->rpc_done = 0;
2125 data->rpc_status = 0;
2ced46c2 2126 data->cancelled = 0;
bdeca1b7
TM		 2127 data->is_recover = 0;
2128 if (isrecover) {
8fe72bac 2129 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 2130 data->is_recover = 1;
2131 }
c970aa85 2132 task = rpc_run_task(&task_setup_data);
b257957e
AB		 2133 if (IS_ERR(task))
2134 return PTR_ERR(task);
2135 status = nfs4_wait_for_completion_rpc_task(task);
2136 if (status != 0) {
2137 data->cancelled = 1;
2138 smp_wmb();
2139 } else
2140 status = data->rpc_status;
2141 rpc_put_task(task);
2142
2143 return status;
2144}
2145
2146static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2147{
2b0143b5 2148 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2149 struct nfs_openres *o_res = &data->o_res;
2150 int status;
2151
2152 status = nfs4_run_open_task(data, 1);
2153 if (status != 0 || !data->rpc_done)
2154 return status;
2155
6926afd1
TM		 2156 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2157
b257957e
AB		 2158 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2159 status = _nfs4_proc_open_confirm(data);
2160 if (status != 0)
2161 return status;
2162 }
2163
2164 return status;
2165}
2166
f3792d63
TM		 2167/*
2168 * Additional permission checks in order to distinguish between an
2169 * open for read, and an open for execute. This works around the
2170 * fact that NFSv4 OPEN treats read and execute permissions as being
2171 * the same.
2172 * Note that in the non-execute case, we want to turn off permission
2173 * checking if we just created a new file (POSIX open() semantics).
2174 */
6168f62c
WAA		 2175static int nfs4_opendata_access(struct rpc_cred *cred,
2176 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2177 struct nfs4_state *state, fmode_t fmode,
2178 int openflags)
6168f62c
WAA		 2179{
2180 struct nfs_access_entry cache;
2181 u32 mask;
2182
2183 /* access call failed or for some reason the server doesn't
2184 * support any access modes -- defer access call until later */
2185 if (opendata->o_res.access_supported == 0)
2186 return 0;
2187
2188 mask = 0;
f3792d63
TM		 2189 /*
2190 * Use openflags to check for exec, because fmode won't
2191 * always have FMODE_EXEC set when file open for exec.
2192 */
f8d9a897
WAA		 2193 if (openflags & __FMODE_EXEC) {
2194 /* ONLY check for exec rights */
2195 mask = MAY_EXEC;
f3792d63 2196 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2197 mask = MAY_READ;
6168f62c
WAA		 2198
2199 cache.cred = cred;
2200 cache.jiffies = jiffies;
2201 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2202 nfs_access_add_cache(state->inode, &cache);
2203
bbd3a8ee 2204 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2205 return 0;
2206
2207 /* even though OPEN succeeded, access is denied. Close the file */
2208 nfs4_close_state(state, fmode);
998f40b5 2209 return -EACCES;
6168f62c
WAA		 2210}
2211
b257957e
AB		 2212/*
2213 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2214 */
2215static int _nfs4_proc_open(struct nfs4_opendata *data)
2216{
2b0143b5 2217 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2218 struct nfs_server *server = NFS_SERVER(dir);
2219 struct nfs_openargs *o_arg = &data->o_arg;
2220 struct nfs_openres *o_res = &data->o_res;
2221 int status;
2222
2223 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2224 if (!data->rpc_done)
2225 return status;
2226 if (status != 0) {
2227 if (status == -NFS4ERR_BADNAME &&
2228 !(o_arg->open_flags & O_CREAT))
2229 return -ENOENT;
24ac23ab 2230 return status;
08ef7bd3 2231 }
24ac23ab 2232
6926afd1
TM		 2233 nfs_fattr_map_and_free_names(server, &data->f_attr);
2234
5bc2afc2 2235 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2236 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2237 if (o_arg->open_flags & O_EXCL)
2238 data->file_created = 1;
2239 else if (o_res->cinfo.before != o_res->cinfo.after)
2240 data->file_created = 1;
2241 }
0df5dd4a
TM		 2242 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2243 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2244 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2245 status = _nfs4_proc_open_confirm(data);
1da177e4 2246 if (status != 0)
24ac23ab 2247 return status;
1da177e4
LT		 2248 }
2249 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2250 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2251 return 0;
1da177e4
LT		 2252}
2253
d83217c1
AA		 2254static int nfs4_recover_expired_lease(struct nfs_server *server)
2255{
2256 return nfs4_client_recover_expired_lease(server->nfs_client);
2257}
2258
1da177e4
LT		 2259/*
2260 * OPEN_EXPIRED:
2261 * reclaim state on the server after a network partition.
2262 * Assumes caller holds the appropriate lock
2263 */
539cd03a 2264static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2265{
e56e0b78 2266 struct nfs4_opendata *opendata;
864472e9 2267 int ret;
1da177e4 2268
4a1c0893 2269 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2270 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2271 if (IS_ERR(opendata))
2272 return PTR_ERR(opendata);
864472e9 2273 ret = nfs4_open_recover(opendata, state);
35d05778 2274 if (ret == -ESTALE)
3d4ff43d 2275 d_drop(ctx->dentry);
c6d00e63 2276 nfs4_opendata_put(opendata);
864472e9 2277 return ret;
1da177e4
LT		 2278}
2279
a9ed2e25 2280static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2281{
539cd03a 2282 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2283 struct nfs4_exception exception = { };
2284 int err;
2285
2286 do {
539cd03a 2287 err = _nfs4_open_expired(ctx, state);
42113a75 2288 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2289 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2290 continue;
a9ed2e25
TM		 2291 switch (err) {
2292 default:
2293 goto out;
2294 case -NFS4ERR_GRACE:
2295 case -NFS4ERR_DELAY:
2296 nfs4_handle_exception(server, err, &exception);
2297 err = 0;
2298 }
202b50dc 2299 } while (exception.retry);
a9ed2e25 2300out:
202b50dc
TM		 2301 return err;
2302}
2303
1da177e4
LT		 2304static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2305{
1da177e4 2306 struct nfs_open_context *ctx;
864472e9 2307 int ret;
1da177e4 2308
864472e9
TM		 2309 ctx = nfs4_state_find_open_context(state);
2310 if (IS_ERR(ctx))
91876b13 2311 return -EAGAIN;
539cd03a 2312 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2313 put_nfs_open_context(ctx);
2314 return ret;
1da177e4
LT		 2315}
2316
4dfd4f7a
TM		 2317static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2318{
2319 nfs_remove_bad_delegation(state->inode);
2320 write_seqlock(&state->seqlock);
2321 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2322 write_sequnlock(&state->seqlock);
2323 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2324}
2325
2326static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2327{
2328 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2329 nfs_finish_clear_delegation_stateid(state);
2330}
2331
2332static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2333{
2334 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2335 nfs40_clear_delegation_stateid(state);
2336 return nfs4_open_expired(sp, state);
2337}
2338
f062eb6c 2339#if defined(CONFIG_NFS_V4_1)
0c116cad 2340static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2341{
f062eb6c 2342 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2343 nfs4_stateid stateid;
ab7cb0df 2344 struct nfs_delegation *delegation;
0c116cad
TM		 2345 struct rpc_cred *cred;
2346 int status;
3e60ffdd 2347
ab7cb0df
TM		 2348 /* Get the delegation credential for use by test/free_stateid */
2349 rcu_read_lock();
2350 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2351 if (delegation == NULL) {
ab7cb0df 2352 rcu_read_unlock();
0c116cad
TM		 2353 return;
2354 }
2355
2356 nfs4_stateid_copy(&stateid, &delegation->stateid);
2357 cred = get_rpccred(delegation->cred);
2358 rcu_read_unlock();
2359 status = nfs41_test_stateid(server, &stateid, cred);
2360 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df 2361
3e60ffdd
CL		 2362 if (status != NFS_OK) {
2363 /* Free the stateid unless the server explicitly
2364 * informs us the stateid is unrecognized. */
2365 if (status != -NFS4ERR_BAD_STATEID)
0c116cad
TM		 2366 nfs41_free_stateid(server, &stateid, cred);
2367 nfs_finish_clear_delegation_stateid(state);
3e60ffdd 2368 }
ab7cb0df 2369
0c116cad 2370 put_rpccred(cred);
3e60ffdd
CL		 2371}
2372
2373/**
2374 * nfs41_check_open_stateid - possibly free an open stateid
2375 *
2376 * @state: NFSv4 state for an inode
2377 *
2378 * Returns NFS_OK if recovery for this stateid is now finished.
2379 * Otherwise a negative NFS4ERR value is returned.
2380 */
2381static int nfs41_check_open_stateid(struct nfs4_state *state)
2382{
2383 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2384 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2385 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2386 int status;
2387
2388 /* If a state reset has been done, test_stateid is unneeded */
2389 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2390 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2391 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2392 return -NFS4ERR_BAD_STATEID;
2393
ab7cb0df 2394 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2395 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2396 if (status != NFS_OK) {
2397 /* Free the stateid unless the server explicitly
2398 * informs us the stateid is unrecognized. */
2399 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2400 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2401
2402 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2403 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2404 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2405 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2406 }
2407 return status;
2408}
2409
2410static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2411{
eb64cf96 2412 int status;
b01dd1d8 2413
0c116cad 2414 nfs41_check_delegation_stateid(state);
3e60ffdd 2415 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2416 if (status != NFS_OK)
2417 status = nfs4_open_expired(sp, state);
2418 return status;
f062eb6c
BS		 2419}
2420#endif
2421
aa53ed54
JL		 2422/*
2423 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2424 * fields corresponding to attributes that were used to store the verifier.
2425 * Make sure we clobber those fields in the later setattr call
2426 */
5334c5bd
KM		 2427static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2428 struct iattr *sattr, struct nfs4_label **label)
aa53ed54 2429{
5334c5bd
KM		 2430 const u32 *attrset = opendata->o_res.attrset;
2431
2432 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
aa53ed54
JL		 2433 !(sattr->ia_valid & ATTR_ATIME_SET))
2434 sattr->ia_valid |= ATTR_ATIME;
2435
5334c5bd 2436 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
aa53ed54
JL		 2437 !(sattr->ia_valid & ATTR_MTIME_SET))
2438 sattr->ia_valid |= ATTR_MTIME;
5334c5bd
KM		 2439
2440 /* Except MODE, it seems harmless of setting twice. */
2441 if ((attrset[1] & FATTR4_WORD1_MODE))
2442 sattr->ia_valid &= ~ATTR_MODE;
2443
2444 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2445 *label = NULL;
aa53ed54
JL		 2446}
2447
c21443c2
TM		 2448static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2449 fmode_t fmode,
2450 int flags,
3efb9722 2451 struct nfs_open_context *ctx)
c21443c2
TM		 2452{
2453 struct nfs4_state_owner *sp = opendata->owner;
2454 struct nfs_server *server = sp->so_server;
275bb307 2455 struct dentry *dentry;
c21443c2
TM		 2456 struct nfs4_state *state;
2457 unsigned int seq;
2458 int ret;
2459
2460 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2461
2462 ret = _nfs4_proc_open(opendata);
dca78001 2463 if (ret != 0)
c21443c2
TM		 2464 goto out;
2465
2466 state = nfs4_opendata_to_nfs4_state(opendata);
2467 ret = PTR_ERR(state);
2468 if (IS_ERR(state))
2469 goto out;
2470 if (server->caps & NFS_CAP_POSIX_LOCK)
2471 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2472
275bb307 2473 dentry = opendata->dentry;
2b0143b5 2474 if (d_really_is_negative(dentry)) {
668d0cd5 2475 struct dentry *alias;
275bb307 2476 d_drop(dentry);
668d0cd5
AV		 2477 alias = d_exact_alias(dentry, state->inode);
2478 if (!alias)
2479 alias = d_splice_alias(igrab(state->inode), dentry);
2480 /* d_splice_alias() can't fail here - it's a non-directory */
2481 if (alias) {
275bb307 2482 dput(ctx->dentry);
668d0cd5 2483 ctx->dentry = dentry = alias;
275bb307
TM		 2484 }
2485 nfs_set_verifier(dentry,
2b0143b5 2486 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2487 }
2488
c21443c2
TM		 2489 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2490 if (ret != 0)
2491 goto out;
2492
3efb9722 2493 ctx->state = state;
2b0143b5 2494 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2495 nfs_inode_attach_open_context(ctx);
2496 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2497 nfs4_schedule_stateid_recovery(server, state);
2498 }
c21443c2
TM		 2499out:
2500 return ret;
2501}
2502
1da177e4 2503/*
24ac23ab 2504 * Returns a referenced nfs4_state
1da177e4 2505 */
82be417a 2506static int _nfs4_do_open(struct inode *dir,
4197a055 2507 struct nfs_open_context *ctx,
82be417a
AA		 2508 int flags,
2509 struct iattr *sattr,
5bc2afc2
TM		 2510 struct nfs4_label *label,
2511 int *opened)
1da177e4
LT		 2512{
2513 struct nfs4_state_owner *sp;
2514 struct nfs4_state *state = NULL;
2515 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2516 struct nfs4_opendata *opendata;
4197a055
TM		 2517 struct dentry *dentry = ctx->dentry;
2518 struct rpc_cred *cred = ctx->cred;
2519 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2520 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2521 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2522 struct nfs4_label *olabel = NULL;
aac00a8d 2523 int status;
1da177e4
LT		 2524
2525 /* Protect against reboot recovery conflicts */
1da177e4 2526 status = -ENOMEM;
d1e284d5
TM		 2527 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2528 if (sp == NULL) {
1da177e4
LT		 2529 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2530 goto out_err;
2531 }
58d9714a
TM		 2532 status = nfs4_recover_expired_lease(server);
2533 if (status != 0)
b4454fe1 2534 goto err_put_state_owner;
2b0143b5
DH		 2535 if (d_really_is_positive(dentry))
2536 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2537 status = -ENOMEM;
2b0143b5 2538 if (d_really_is_positive(dentry))
49f9a0fa 2539 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2540 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2541 label, claim, GFP_KERNEL);
e56e0b78 2542 if (opendata == NULL)
95d35cb4 2543 goto err_put_state_owner;
1da177e4 2544
14c43f76
DQ		 2545 if (label) {
2546 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2547 if (IS_ERR(olabel)) {
2548 status = PTR_ERR(olabel);
2549 goto err_opendata_put;
2550 }
2551 }
2552
e911b815
TM		 2553 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2554 if (!opendata->f_attr.mdsthreshold) {
2555 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2556 if (!opendata->f_attr.mdsthreshold)
2557 goto err_free_label;
2558 }
1549210f 2559 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2560 }
2b0143b5
DH		 2561 if (d_really_is_positive(dentry))
2562 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2563
3efb9722 2564 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2565 if (status != 0)
14c43f76 2566 goto err_free_label;
3efb9722 2567 state = ctx->state;
6168f62c 2568
efcbc04e 2569 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 2570 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
5334c5bd 2571 nfs4_exclusive_attrset(opendata, sattr, &label);
a1d1c4f1
TM		 2572 /*
2573 * send create attributes which was not set by open
2574 * with an extra setattr.
2575 */
2576 if (sattr->ia_valid & NFS4_VALID_ATTRS) {
2577 nfs_fattr_init(opendata->o_res.f_attr);
2578 status = nfs4_do_setattr(state->inode, cred,
2579 opendata->o_res.f_attr, sattr,
2580 state, label, olabel);
2581 if (status == 0) {
2582 nfs_setattr_update_inode(state->inode, sattr,
2583 opendata->o_res.f_attr);
2584 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2585 }
1775fd3e 2586 }
0ab64e0e 2587 }
c5c3fb5f 2588 if (opened && opendata->file_created)
5bc2afc2 2589 *opened |= FILE_CREATED;
82be417a 2590
e911b815 2591 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2592 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2593 opendata->f_attr.mdsthreshold = NULL;
2594 }
82be417a 2595
14c43f76
DQ		 2596 nfs4_label_free(olabel);
2597
c6d00e63 2598 nfs4_opendata_put(opendata);
1da177e4 2599 nfs4_put_state_owner(sp);
1da177e4 2600 return 0;
14c43f76
DQ		 2601err_free_label:
2602 nfs4_label_free(olabel);
c6d00e63
TM		 2603err_opendata_put:
2604 nfs4_opendata_put(opendata);
e56e0b78
TM		 2605err_put_state_owner:
2606 nfs4_put_state_owner(sp);
1da177e4 2607out_err:
1da177e4
LT		 2608 return status;
2609}
2610
2611
82be417a 2612static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2613 struct nfs_open_context *ctx,
82be417a
AA		 2614 int flags,
2615 struct iattr *sattr,
5bc2afc2
TM		 2616 struct nfs4_label *label,
2617 int *opened)
1da177e4 2618{
49f9a0fa 2619 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2620 struct nfs4_exception exception = { };
2621 struct nfs4_state *res;
2622 int status;
2623
2624 do {
5bc2afc2 2625 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2626 res = ctx->state;
42113a75 2627 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2628 if (status == 0)
2629 break;
2630 /* NOTE: BAD_SEQID means the server and client disagree about the
2631 * book-keeping w.r.t. state-changing operations
2632 * (OPEN/CLOSE/LOCK/LOCKU...)
2633 * It is actually a sign of a bug on the client or on the server.
2634 *
2635 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2636 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2637 * have unhashed the old state_owner for us, and that we can
2638 * therefore safely retry using a new one. We should still warn
2639 * the user though...
2640 */
2641 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2642 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2643 " returned a bad sequence-id error!\n",
2644 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2645 exception.retry = 1;
2646 continue;
2647 }
550f5747
TM		 2648 /*
2649 * BAD_STATEID on OPEN means that the server cancelled our
2650 * state before it received the OPEN_CONFIRM.
2651 * Recover by retrying the request as per the discussion
2652 * on Page 181 of RFC3530.
2653 */
2654 if (status == -NFS4ERR_BAD_STATEID) {
2655 exception.retry = 1;
2656 continue;
2657 }
aac00a8d
TM		 2658 if (status == -EAGAIN) {
2659 /* We must have found a delegation */
2660 exception.retry = 1;
2661 continue;
2662 }
49f9a0fa
TM		 2663 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2664 continue;
2665 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2666 status, &exception));
2667 } while (exception.retry);
2668 return res;
2669}
2670
659bfcd6
TM		 2671static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2672 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2673 struct nfs4_state *state, struct nfs4_label *ilabel,
2674 struct nfs4_label *olabel)
1da177e4 2675{
3e4f6290 2676 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2677 struct nfs_setattrargs arg = {
3e4f6290 2678 .fh = NFS_FH(inode),
1da177e4
LT		 2679 .iap = sattr,
2680 .server = server,
2681 .bitmask = server->attr_bitmask,
1775fd3e 2682 .label = ilabel,
1da177e4
LT		 2683 };
2684 struct nfs_setattrres res = {
2685 .fattr = fattr,
1775fd3e 2686 .label = olabel,
1da177e4
LT		 2687 .server = server,
2688 };
2689 struct rpc_message msg = {
659bfcd6
TM		 2690 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2691 .rpc_argp = &arg,
2692 .rpc_resp = &res,
2693 .rpc_cred = cred,
1da177e4 2694 };
26e976a8 2695 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2696 fmode_t fmode;
2697 bool truncate;
65e4308d 2698 int status;
1da177e4 2699
aa9c2669
DQ		 2700 arg.bitmask = nfs4_bitmask(server, ilabel);
2701 if (ilabel)
2702 arg.bitmask = nfs4_bitmask(server, olabel);
2703
0e574af1 2704 nfs_fattr_init(fattr);
1da177e4 2705
ee3ae84e
TM		 2706 /* Servers should only apply open mode checks for file size changes */
2707 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2708 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2709
2710 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2711 /* Use that stateid */
0418dae1 2712 } else if (truncate && state != NULL) {
2a369153
TM		 2713 struct nfs_lockowner lockowner = {
2714 .l_owner = current->files,
2715 .l_pid = current->tgid,
2716 };
0418dae1
TM		 2717 if (!nfs4_valid_open_stateid(state))
2718 return -EBADF;
2719 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2720 &lockowner) == -EIO)
2721 return -EBADF;
08e9eac4 2722 } else
f597c537 2723 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2724
7c513058 2725 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2726 if (status == 0 && state != NULL)
2727 renew_lease(server, timestamp);
48c9579a 2728 trace_nfs4_setattr(inode, &arg.stateid, status);
65e4308d 2729 return status;
1da177e4
LT		 2730}
2731
659bfcd6
TM		 2732static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2733 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2734 struct nfs4_state *state, struct nfs4_label *ilabel,
2735 struct nfs4_label *olabel)
1da177e4 2736{
3e4f6290 2737 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2738 struct nfs4_exception exception = {
2739 .state = state,
3114ea7a 2740 .inode = inode,
a1d0b5ee 2741 };
1da177e4
LT		 2742 int err;
2743 do {
1775fd3e 2744 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
451146be
TM		 2745 switch (err) {
2746 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2747 if (!(sattr->ia_valid & ATTR_SIZE)) {
2748 pr_warn_once("NFSv4: server %s is incorrectly "
2749 "applying open mode checks to "
2750 "a SETATTR that is not "
2751 "changing file size.\n",
2752 server->nfs_client->cl_hostname);
2753 }
451146be
TM		 2754 if (state && !(state->state & FMODE_WRITE)) {
2755 err = -EBADF;
2756 if (sattr->ia_valid & ATTR_OPEN)
2757 err = -EACCES;
2758 goto out;
2759 }
2760 }
2761 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2762 } while (exception.retry);
451146be 2763out:
1da177e4
LT		 2764 return err;
2765}
2766
500d701f
PT		 2767static bool
2768nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
2769{
2770 if (inode == NULL || !nfs_have_layout(inode))
2771 return false;
2772
2773 return pnfs_wait_on_layoutreturn(inode, task);
2774}
2775
1da177e4
LT		 2776struct nfs4_closedata {
2777 struct inode *inode;
2778 struct nfs4_state *state;
2779 struct nfs_closeargs arg;
2780 struct nfs_closeres res;
516a6af6 2781 struct nfs_fattr fattr;
26e976a8 2782 unsigned long timestamp;
f7e8917a
FI		 2783 bool roc;
2784 u32 roc_barrier;
1da177e4
LT		 2785};
2786
963d8fe5 2787static void nfs4_free_closedata(void *data)
9512135d 2788{
963d8fe5
TM		 2789 struct nfs4_closedata *calldata = data;
2790 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2791 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2792
f7e8917a
FI		 2793 if (calldata->roc)
2794 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2795 nfs4_put_open_state(calldata->state);
2796 nfs_free_seqid(calldata->arg.seqid);
9512135d 2797 nfs4_put_state_owner(sp);
322b2b90 2798 nfs_sb_deactive(sb);
9512135d
TM		 2799 kfree(calldata);
2800}
2801
963d8fe5 2802static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2803{
963d8fe5 2804 struct nfs4_closedata *calldata = data;
1da177e4 2805 struct nfs4_state *state = calldata->state;
1da177e4 2806 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2807 nfs4_stateid *res_stateid = NULL;
1da177e4 2808
a3ca5651 2809 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2810 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2811 return;
42113a75 2812 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2813 /* hmm. we are done with the inode, and in the process of freeing
2814 * the state_owner. we keep this around to process errors
2815 */
1da177e4
LT		 2816 switch (task->tk_status) {
2817 case 0:
412f6c4c 2818 res_stateid = &calldata->res.stateid;
3c13cb5b 2819 if (calldata->roc)
f7e8917a
FI		 2820 pnfs_roc_set_barrier(state->inode,
2821 calldata->roc_barrier);
26e976a8 2822 renew_lease(server, calldata->timestamp);
412f6c4c 2823 break;
69794ad7 2824 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2825 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2826 case -NFS4ERR_OLD_STATEID:
2827 case -NFS4ERR_BAD_STATEID:
1da177e4 2828 case -NFS4ERR_EXPIRED:
566fcec6 2829 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 2830 &state->open_stateid)) {
566fcec6
TM		 2831 rpc_restart_call_prepare(task);
2832 goto out_release;
2833 }
dc0b027d 2834 if (calldata->arg.fmode == 0)
9e33bed5 2835 break;
1da177e4 2836 default:
8478eaa1 2837 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 2838 rpc_restart_call_prepare(task);
69794ad7
TM		 2839 goto out_release;
2840 }
1da177e4 2841 }
4a1e2feb
TM		 2842 nfs_clear_open_stateid(state, &calldata->arg.stateid,
2843 res_stateid, calldata->arg.fmode);
69794ad7 2844out_release:
72211dbe 2845 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2846 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2847 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2848}
2849
4ce70ada 2850static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2851{
4ce70ada 2852 struct nfs4_closedata *calldata = data;
9512135d 2853 struct nfs4_state *state = calldata->state;
7fdab069 2854 struct inode *inode = calldata->inode;
aee7af35 2855 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2856 int call_close = 0;
9512135d 2857
a3ca5651 2858 dprintk("%s: begin!\n", __func__);
963d8fe5 2859 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2860 goto out_wait;
003707c7 2861
88069f77 2862 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2863 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2864 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2865 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2866 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 2867 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 2868 /* Calculate the change in open mode */
cd9288ff 2869 calldata->arg.fmode = 0;
e7616923 2870 if (state->n_rdwr == 0) {
cd9288ff
TM		 2871 if (state->n_rdonly == 0)
2872 call_close |= is_rdonly;
2873 else if (is_rdonly)
2874 calldata->arg.fmode |= FMODE_READ;
2875 if (state->n_wronly == 0)
2876 call_close |= is_wronly;
2877 else if (is_wronly)
2878 calldata->arg.fmode |= FMODE_WRITE;
2879 } else if (is_rdwr)
2880 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2881
2882 if (calldata->arg.fmode == 0)
2883 call_close |= is_rdwr;
2884
5d422301
TM		 2885 if (!nfs4_valid_open_stateid(state))
2886 call_close = 0;
4cecb76f 2887 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2888
2889 if (!call_close) {
963d8fe5 2890 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2891 goto out_no_action;
9512135d 2892 }
88069f77 2893
500d701f
PT		 2894 if (nfs4_wait_on_layoutreturn(inode, task)) {
2895 nfs_release_seqid(calldata->arg.seqid);
2896 goto out_wait;
2897 }
2898
3c13cb5b 2899 if (calldata->arg.fmode == 0)
88069f77 2900 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3c13cb5b
TM		 2901 if (calldata->roc)
2902 pnfs_roc_get_barrier(inode, &calldata->roc_barrier);
2903
6ae37339
TM		 2904 calldata->arg.share_access =
2905 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2906 calldata->arg.fmode, 0);
88069f77 2907
516a6af6 2908 nfs_fattr_init(calldata->res.fattr);
26e976a8 2909 calldata->timestamp = jiffies;
7fdab069 2910 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2911 &calldata->arg.seq_args,
2912 &calldata->res.seq_res,
2240a9e2
TM		 2913 task) != 0)
2914 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2915 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2916 return;
2917out_no_action:
2918 task->tk_action = NULL;
2919out_wait:
2920 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2921}
2922
963d8fe5 2923static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2924 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2925 .rpc_call_done = nfs4_close_done,
2926 .rpc_release = nfs4_free_closedata,
2927};
2928
fe08c546
PT		 2929static bool nfs4_roc(struct inode *inode)
2930{
40dd4b7a 2931 if (!nfs_have_layout(inode))
fe08c546 2932 return false;
fe08c546
PT		 2933 return pnfs_roc(inode);
2934}
2935
1da177e4
LT		 2936/*
2937 * It is possible for data to be read/written from a mem-mapped file
2938 * after the sys_close call (which hits the vfs layer as a flush).
2939 * This means that we can't safely call nfsv4 close on a file until
2940 * the inode is cleared. This in turn means that we are not good
2941 * NFSv4 citizens - we do not indicate to the server to update the file's
2942 * share state even when we are done with one of the three share
2943 * stateid's in the inode.
2944 *
2945 * NOTE: Caller must be holding the sp->so_owner semaphore!
2946 */
1f7977c1 2947int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2948{
4a35bd41 2949 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 2950 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 2951 struct nfs4_closedata *calldata;
b39e625b
TM		 2952 struct nfs4_state_owner *sp = state->owner;
2953 struct rpc_task *task;
5138fde0
TM		 2954 struct rpc_message msg = {
2955 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2956 .rpc_cred = state->owner->so_cred,
2957 };
c970aa85
TM		 2958 struct rpc_task_setup task_setup_data = {
2959 .rpc_client = server->client,
5138fde0 2960 .rpc_message = &msg,
c970aa85 2961 .callback_ops = &nfs4_close_ops,
101070ca 2962 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2963 .flags = RPC_TASK_ASYNC,
2964 };
9512135d 2965 int status = -ENOMEM;
1da177e4 2966
fa940720
WAA		 2967 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2968 &task_setup_data.rpc_client, &msg);
2969
8535b2be 2970 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2971 if (calldata == NULL)
9512135d 2972 goto out;
a9c92d6b 2973 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2974 calldata->inode = state->inode;
1da177e4 2975 calldata->state = state;
4a35bd41 2976 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 2977 /* Serialization for the sequence id */
63f5f796
TM		 2978 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2979 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 2980 if (IS_ERR(calldata->arg.seqid))
9512135d 2981 goto out_free_calldata;
dc0b027d 2982 calldata->arg.fmode = 0;
a65318bf 2983 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2984 calldata->res.fattr = &calldata->fattr;
c1d51931 2985 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2986 calldata->res.server = server;
fe08c546 2987 calldata->roc = nfs4_roc(state->inode);
643168c2 2988 nfs_sb_active(calldata->inode->i_sb);
9512135d 2989
1174dd1f
TM		 2990 msg.rpc_argp = &calldata->arg;
2991 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2992 task_setup_data.callback_data = calldata;
2993 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2994 if (IS_ERR(task))
2995 return PTR_ERR(task);
a49c3c77
TM		 2996 status = 0;
2997 if (wait)
2998 status = rpc_wait_for_completion_task(task);
b39e625b 2999 rpc_put_task(task);
a49c3c77 3000 return status;
9512135d
TM		 3001out_free_calldata:
3002 kfree(calldata);
3003out:
b39e625b
TM		 3004 nfs4_put_open_state(state);
3005 nfs4_put_state_owner(sp);
9512135d 3006 return status;
1da177e4
LT		 3007}
3008
2b484297 3009static struct inode *
5bc2afc2
TM		 3010nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3011 int open_flags, struct iattr *attr, int *opened)
1da177e4 3012{
1da177e4 3013 struct nfs4_state *state;
aa9c2669
DQ		 3014 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3015
3016 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 3017
565277f6 3018 /* Protect against concurrent sillydeletes */
5bc2afc2 3019 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 3020
3021 nfs4_label_release_security(label);
3022
f46e0bd3
TM		 3023 if (IS_ERR(state))
3024 return ERR_CAST(state);
275bb307 3025 return state->inode;
1da177e4
LT		 3026}
3027
1185a552 3028static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 3029{
3030 if (ctx->state == NULL)
3031 return;
3032 if (is_sync)
643168c2 3033 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 3034 else
643168c2 3035 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 3036}
1da177e4 3037
b944dba3
TM		 3038#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3039#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 3040#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 3041
1da177e4
LT		 3042static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3043{
8c61282f 3044 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 3045 struct nfs4_server_caps_arg args = {
3046 .fhandle = fhandle,
8c61282f 3047 .bitmask = bitmask,
43652ad5 3048 };
1da177e4
LT		 3049 struct nfs4_server_caps_res res = {};
3050 struct rpc_message msg = {
3051 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 3052 .rpc_argp = &args,
1da177e4
LT		 3053 .rpc_resp = &res,
3054 };
3055 int status;
3056
8c61282f
KM		 3057 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3058 FATTR4_WORD0_FH_EXPIRE_TYPE |
3059 FATTR4_WORD0_LINK_SUPPORT |
3060 FATTR4_WORD0_SYMLINK_SUPPORT |
3061 FATTR4_WORD0_ACLSUPPORT;
3062 if (minorversion)
3063 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3064
7c513058 3065 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3066 if (status == 0) {
b944dba3 3067 /* Sanity check the server answers */
8c61282f 3068 switch (minorversion) {
b944dba3
TM		 3069 case 0:
3070 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3071 res.attr_bitmask[2] = 0;
3072 break;
3073 case 1:
3074 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3075 break;
3076 case 2:
3077 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3078 }
1da177e4 3079 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 3080 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3081 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3082 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3083 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 3084 NFS_CAP_CTIME|NFS_CAP_MTIME|
3085 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 3086 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3087 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 3088 server->caps |= NFS_CAP_ACLS;
3089 if (res.has_links != 0)
3090 server->caps |= NFS_CAP_HARDLINKS;
3091 if (res.has_symlinks != 0)
3092 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 3093 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3094 server->caps |= NFS_CAP_FILEID;
3095 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3096 server->caps |= NFS_CAP_MODE;
3097 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3098 server->caps |= NFS_CAP_NLINK;
3099 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3100 server->caps |= NFS_CAP_OWNER;
3101 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3102 server->caps |= NFS_CAP_OWNER_GROUP;
3103 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3104 server->caps |= NFS_CAP_ATIME;
3105 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3106 server->caps |= NFS_CAP_CTIME;
3107 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3108 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 3109#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3110 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3111 server->caps |= NFS_CAP_SECURITY_LABEL;
3112#endif
3113 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3114 sizeof(server->attr_bitmask));
b944dba3 3115 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 3116
a65318bf
TM		 3117 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3118 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3119 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 3120 server->cache_consistency_bitmask[2] = 0;
8c61282f
KM		 3121 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3122 sizeof(server->exclcreat_bitmask));
1da177e4 3123 server->acl_bitmask = res.acl_bitmask;
264e6351 3124 server->fh_expire_type = res.fh_expire_type;
1da177e4 3125 }
cccef3b9 3126
1da177e4
LT		 3127 return status;
3128}
3129
55a97593 3130int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 3131{
3132 struct nfs4_exception exception = { };
3133 int err;
3134 do {
3135 err = nfs4_handle_exception(server,
3136 _nfs4_server_capabilities(server, fhandle),
3137 &exception);
3138 } while (exception.retry);
3139 return err;
3140}
3141
3142static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3143 struct nfs_fsinfo *info)
3144{
aa9c2669 3145 u32 bitmask[3];
1da177e4 3146 struct nfs4_lookup_root_arg args = {
aa9c2669 3147 .bitmask = bitmask,
1da177e4
LT		 3148 };
3149 struct nfs4_lookup_res res = {
3150 .server = server,
0e574af1 3151 .fattr = info->fattr,
1da177e4
LT		 3152 .fh = fhandle,
3153 };
3154 struct rpc_message msg = {
3155 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3156 .rpc_argp = &args,
3157 .rpc_resp = &res,
3158 };
008f55d0 3159
aa9c2669
DQ		 3160 bitmask[0] = nfs4_fattr_bitmap[0];
3161 bitmask[1] = nfs4_fattr_bitmap[1];
3162 /*
3163 * Process the label in the upcoming getfattr
3164 */
3165 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3166
0e574af1 3167 nfs_fattr_init(info->fattr);
7c513058 3168 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3169}
3170
3171static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3172 struct nfs_fsinfo *info)
3173{
3174 struct nfs4_exception exception = { };
3175 int err;
3176 do {
fb8a5ba8 3177 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3178 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3179 switch (err) {
3180 case 0:
3181 case -NFS4ERR_WRONGSEC:
05e9cfb4 3182 goto out;
fb8a5ba8
BS		 3183 default:
3184 err = nfs4_handle_exception(server, err, &exception);
3185 }
1da177e4 3186 } while (exception.retry);
05e9cfb4 3187out:
1da177e4
LT		 3188 return err;
3189}
3190
8f70e95f
BS		 3191static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3192 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3193{
c2190661
TM		 3194 struct rpc_auth_create_args auth_args = {
3195 .pseudoflavor = flavor,
3196 };
8f70e95f
BS		 3197 struct rpc_auth *auth;
3198 int ret;
3199
c2190661 3200 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3201 if (IS_ERR(auth)) {
75bc8821 3202 ret = -EACCES;
8f70e95f
BS		 3203 goto out;
3204 }
3205 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3206out:
3207 return ret;
3208}
3209
9a744ba3
CL		 3210/*
3211 * Retry pseudoroot lookup with various security flavors. We do this when:
3212 *
3213 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3214 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3215 *
3216 * Returns zero on success, or a negative NFS4ERR value, or a
3217 * negative errno value.
3218 */
801a16dc 3219static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3220 struct nfs_fsinfo *info)
1da177e4 3221{
9a744ba3
CL		 3222 /* Per 3530bis 15.33.5 */
3223 static const rpc_authflavor_t flav_array[] = {
3224 RPC_AUTH_GSS_KRB5P,
3225 RPC_AUTH_GSS_KRB5I,
3226 RPC_AUTH_GSS_KRB5,
c4eafe11 3227 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3228 RPC_AUTH_NULL,
3229 };
3230 int status = -EPERM;
3231 size_t i;
6a1a1e34 3232
4d4b69dd
WAA		 3233 if (server->auth_info.flavor_len > 0) {
3234 /* try each flavor specified by user */
3235 for (i = 0; i < server->auth_info.flavor_len; i++) {
3236 status = nfs4_lookup_root_sec(server, fhandle, info,
3237 server->auth_info.flavors[i]);
3238 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3239 continue;
3240 break;
3241 }
3242 } else {
3243 /* no flavors specified by user, try default list */
3244 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3245 status = nfs4_lookup_root_sec(server, fhandle, info,
3246 flav_array[i]);
3247 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3248 continue;
3249 break;
3250 }
8f70e95f 3251 }
9a744ba3 3252
fb8a5ba8
BS		 3253 /*
3254 * -EACCESS could mean that the user doesn't have correct permissions
3255 * to access the mount. It could also mean that we tried to mount
3256 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3257 * existing mount programs don't handle -EACCES very well so it should
3258 * be mapped to -EPERM instead.
3259 */
3260 if (status == -EACCES)
3261 status = -EPERM;
801a16dc
BS		 3262 return status;
3263}
3264
2ed4b95b
CL		 3265static int nfs4_do_find_root_sec(struct nfs_server *server,
3266 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3267{
3268 int mv = server->nfs_client->cl_minorversion;
3269 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3270}
3271
3272/**
3273 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3274 * @server: initialized nfs_server handle
3275 * @fhandle: we fill in the pseudo-fs root file handle
3276 * @info: we fill in an FSINFO struct
5e6b1990 3277 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3278 *
3279 * Returns zero on success, or a negative errno.
801a16dc 3280 */
3028eb2b 3281int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3282 struct nfs_fsinfo *info,
3283 bool auth_probe)
801a16dc 3284{
c7757074 3285 int status = 0;
2ed4b95b 3286
c7757074 3287 if (!auth_probe)
5e6b1990 3288 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3289
3290 if (auth_probe || status == NFS4ERR_WRONGSEC)
2ed4b95b
CL		 3291 status = nfs4_do_find_root_sec(server, fhandle, info);
3292
1da177e4
LT		 3293 if (status == 0)
3294 status = nfs4_server_capabilities(server, fhandle);
3295 if (status == 0)
3296 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3297
c12e87f4 3298 return nfs4_map_errors(status);
1da177e4
LT		 3299}
3300
bae36241
BS		 3301static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3302 struct nfs_fsinfo *info)
3303{
3304 int error;
3305 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3306 struct nfs4_label *label = NULL;
bae36241
BS		 3307
3308 error = nfs4_server_capabilities(server, mntfh);
3309 if (error < 0) {
3310 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3311 return error;
3312 }
3313
14c43f76
DQ		 3314 label = nfs4_label_alloc(server, GFP_KERNEL);
3315 if (IS_ERR(label))
3316 return PTR_ERR(label);
3317
1775fd3e 3318 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3319 if (error < 0) {
3320 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3321 goto err_free_label;
bae36241
BS		 3322 }
3323
3324 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3325 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3326 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3327
14c43f76
DQ		 3328err_free_label:
3329 nfs4_label_free(label);
3330
bae36241
BS		 3331 return error;
3332}
3333
6b97fd3d
MN		 3334/*
3335 * Get locations and (maybe) other attributes of a referral.
3336 * Note that we'll actually follow the referral later when
3337 * we detect fsid mismatch in inode revalidation
3338 */
f05d147f
BS		 3339static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3340 const struct qstr *name, struct nfs_fattr *fattr,
3341 struct nfs_fh *fhandle)
6b97fd3d
MN		 3342{
3343 int status = -ENOMEM;
3344 struct page *page = NULL;
3345 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3346
3347 page = alloc_page(GFP_KERNEL);
3348 if (page == NULL)
3349 goto out;
3350 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3351 if (locations == NULL)
3352 goto out;
3353
f05d147f 3354 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3355 if (status != 0)
3356 goto out;
519ae255
CL		 3357
3358 /*
3359 * If the fsid didn't change, this is a migration event, not a
3360 * referral. Cause us to drop into the exception handler, which
3361 * will kick off migration recovery.
3362 */
6b97fd3d 3363 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3364 dprintk("%s: server did not return a different fsid for"
3365 " a referral at %s\n", __func__, name->name);
519ae255 3366 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3367 goto out;
3368 }
533eb461
AA		 3369 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3370 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3371
533eb461 3372 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3373 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3374 memset(fhandle, 0, sizeof(struct nfs_fh));
3375out:
3376 if (page)
3377 __free_page(page);
5d7ca35a 3378 kfree(locations);
6b97fd3d
MN		 3379 return status;
3380}
3381
1775fd3e
DQ		 3382static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3383 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3384{
3385 struct nfs4_getattr_arg args = {
3386 .fh = fhandle,
3387 .bitmask = server->attr_bitmask,
3388 };
3389 struct nfs4_getattr_res res = {
3390 .fattr = fattr,
1775fd3e 3391 .label = label,
1da177e4
LT		 3392 .server = server,
3393 };
3394 struct rpc_message msg = {
3395 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3396 .rpc_argp = &args,
3397 .rpc_resp = &res,
3398 };
aa9c2669
DQ		 3399
3400 args.bitmask = nfs4_bitmask(server, label);
3401
0e574af1 3402 nfs_fattr_init(fattr);
7c513058 3403 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3404}
3405
1775fd3e
DQ		 3406static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3407 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3408{
3409 struct nfs4_exception exception = { };
3410 int err;
3411 do {
b5f875a9
TM		 3412 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3413 trace_nfs4_getattr(server, fhandle, fattr, err);
3414 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3415 &exception);
3416 } while (exception.retry);
3417 return err;
3418}
3419
3420/*
3421 * The file is not closed if it is opened due to the a request to change
3422 * the size of the file. The open call will not be needed once the
3423 * VFS layer lookup-intents are implemented.
3424 *
3425 * Close is called when the inode is destroyed.
3426 * If we haven't opened the file for O_WRONLY, we
3427 * need to in the size_change case to obtain a stateid.
3428 *
3429 * Got race?
3430 * Because OPEN is always done by name in nfsv4, it is
3431 * possible that we opened a different file by the same
3432 * name. We can recognize this race condition, but we
3433 * can't do anything about it besides returning an error.
3434 *
3435 * This will be fixed with VFS changes (lookup-intent).
3436 */
3437static int
3438nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3439 struct iattr *sattr)
3440{
2b0143b5 3441 struct inode *inode = d_inode(dentry);
659bfcd6 3442 struct rpc_cred *cred = NULL;
d530838b 3443 struct nfs4_state *state = NULL;
14c43f76 3444 struct nfs4_label *label = NULL;
1da177e4
LT		 3445 int status;
3446
88ac815c
PT		 3447 if (pnfs_ld_layoutret_on_setattr(inode) &&
3448 sattr->ia_valid & ATTR_SIZE &&
3449 sattr->ia_size < i_size_read(inode))
24028672 3450 pnfs_commit_and_return_layout(inode);
8a1636c4 3451
0e574af1 3452 nfs_fattr_init(fattr);
1da177e4 3453
2669940d
AA		 3454 /* Deal with open(O_TRUNC) */
3455 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3456 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3457
3458 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3459 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3460 return 0;
3461
d530838b 3462 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3463 if (sattr->ia_valid & ATTR_FILE) {
3464 struct nfs_open_context *ctx;
3465
3466 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3467 if (ctx) {
3468 cred = ctx->cred;
3469 state = ctx->state;
3470 }
659bfcd6 3471 }
08e9eac4 3472
14c43f76
DQ		 3473 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3474 if (IS_ERR(label))
3475 return PTR_ERR(label);
3476
3477 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3478 if (status == 0) {
f044636d 3479 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3480 nfs_setsecurity(inode, fattr, label);
3481 }
14c43f76 3482 nfs4_label_free(label);
1da177e4
LT		 3483 return status;
3484}
3485
0c2e53f1
TM		 3486static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3487 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3488 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3489{
0c2e53f1 3490 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3491 int status;
3492 struct nfs4_lookup_arg args = {
3493 .bitmask = server->attr_bitmask,
0c2e53f1 3494 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3495 .name = name,
3496 };
3497 struct nfs4_lookup_res res = {
3498 .server = server,
3499 .fattr = fattr,
aa9c2669 3500 .label = label,
2b3de441
DH		 3501 .fh = fhandle,
3502 };
3503 struct rpc_message msg = {
3504 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3505 .rpc_argp = &args,
3506 .rpc_resp = &res,
3507 };
3508
aa9c2669
DQ		 3509 args.bitmask = nfs4_bitmask(server, label);
3510
2b3de441
DH		 3511 nfs_fattr_init(fattr);
3512
1da177e4 3513 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3514 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3515 dprintk("NFS reply lookup: %d\n", status);
3516 return status;
3517}
3518
72de53ec 3519static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3520{
7ebb9315 3521 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3522 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3523 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3524 fattr->nlink = 2;
3525}
3526
72de53ec
BS		 3527static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3528 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3529 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3530{
3531 struct nfs4_exception exception = { };
72de53ec 3532 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3533 int err;
3534 do {
1775fd3e 3535 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3536 trace_nfs4_lookup(dir, name, err);
72de53ec 3537 switch (err) {
08ef7bd3 3538 case -NFS4ERR_BADNAME:
72de53ec
BS		 3539 err = -ENOENT;
3540 goto out;
0c2e53f1 3541 case -NFS4ERR_MOVED:
f05d147f 3542 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3543 if (err == -NFS4ERR_MOVED)
3544 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3545 goto out;
0c2e53f1 3546 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3547 err = -EPERM;
3548 if (client != *clnt)
3549 goto out;
66b06860 3550 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3551 if (IS_ERR(client))
3552 return PTR_ERR(client);
3553
3554 exception.retry = 1;
3555 break;
3556 default:
3557 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3558 }
1da177e4 3559 } while (exception.retry);
72de53ec
BS		 3560
3561out:
3562 if (err == 0)
3563 *clnt = client;
3564 else if (client != *clnt)
3565 rpc_shutdown_client(client);
3566
1da177e4
LT		 3567 return err;
3568}
3569
80a16b21 3570static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3571 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3572 struct nfs4_label *label)
72de53ec
BS		 3573{
3574 int status;
3575 struct rpc_clnt *client = NFS_CLIENT(dir);
3576
1775fd3e 3577 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3578 if (client != NFS_CLIENT(dir)) {
3579 rpc_shutdown_client(client);
3580 nfs_fixup_secinfo_attributes(fattr);
3581 }
3582 return status;
3583}
3584
f05d147f
BS		 3585struct rpc_clnt *
3586nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3587 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3588{
b72888cb 3589 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3590 int status;
f05d147f 3591
1775fd3e 3592 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3593 if (status < 0)
f05d147f 3594 return ERR_PTR(status);
b72888cb 3595 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3596}
3597
1da177e4
LT		 3598static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3599{
76b32999 3600 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3601 struct nfs4_accessargs args = {
3602 .fh = NFS_FH(inode),
a4980e78 3603 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3604 };
3605 struct nfs4_accessres res = {
3606 .server = server,
1da177e4 3607 };
1da177e4
LT		 3608 struct rpc_message msg = {
3609 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3610 .rpc_argp = &args,
3611 .rpc_resp = &res,
3612 .rpc_cred = entry->cred,
3613 };
3614 int mode = entry->mask;
aa9c2669 3615 int status = 0;
1da177e4
LT		 3616
3617 /*
3618 * Determine which access bits we want to ask for...
3619 */
3620 if (mode & MAY_READ)
3621 args.access |= NFS4_ACCESS_READ;
3622 if (S_ISDIR(inode->i_mode)) {
3623 if (mode & MAY_WRITE)
3624 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3625 if (mode & MAY_EXEC)
3626 args.access |= NFS4_ACCESS_LOOKUP;
3627 } else {
3628 if (mode & MAY_WRITE)
3629 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3630 if (mode & MAY_EXEC)
3631 args.access |= NFS4_ACCESS_EXECUTE;
3632 }
c407d41a
TM		 3633
3634 res.fattr = nfs_alloc_fattr();
3635 if (res.fattr == NULL)
3636 return -ENOMEM;
3637
7c513058 3638 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3639 if (!status) {
6168f62c 3640 nfs_access_set_mask(entry, res.access);
c407d41a 3641 nfs_refresh_inode(inode, res.fattr);
1da177e4 3642 }
c407d41a 3643 nfs_free_fattr(res.fattr);
1da177e4
LT		 3644 return status;
3645}
3646
3647static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3648{
3649 struct nfs4_exception exception = { };
3650 int err;
3651 do {
c1578b76
TM		 3652 err = _nfs4_proc_access(inode, entry);
3653 trace_nfs4_access(inode, err);
3654 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3655 &exception);
3656 } while (exception.retry);
3657 return err;
3658}
3659
3660/*
3661 * TODO: For the time being, we don't try to get any attributes
3662 * along with any of the zero-copy operations READ, READDIR,
3663 * READLINK, WRITE.
3664 *
3665 * In the case of the first three, we want to put the GETATTR
3666 * after the read-type operation -- this is because it is hard
3667 * to predict the length of a GETATTR response in v4, and thus
3668 * align the READ data correctly. This means that the GETATTR
3669 * may end up partially falling into the page cache, and we should
3670 * shift it into the 'tail' of the xdr_buf before processing.
3671 * To do this efficiently, we need to know the total length
3672 * of data received, which doesn't seem to be available outside
3673 * of the RPC layer.
3674 *
3675 * In the case of WRITE, we also want to put the GETATTR after
3676 * the operation -- in this case because we want to make sure
140150db 3677 * we get the post-operation mtime and size.
1da177e4
LT		 3678 *
3679 * Both of these changes to the XDR layer would in fact be quite
3680 * minor, but I decided to leave them for a subsequent patch.
3681 */
3682static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3683 unsigned int pgbase, unsigned int pglen)
3684{
3685 struct nfs4_readlink args = {
3686 .fh = NFS_FH(inode),
3687 .pgbase = pgbase,
3688 .pglen = pglen,
3689 .pages = &page,
3690 };
f50c7000 3691 struct nfs4_readlink_res res;
1da177e4
LT		 3692 struct rpc_message msg = {
3693 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3694 .rpc_argp = &args,
f50c7000 3695 .rpc_resp = &res,
1da177e4
LT		 3696 };
3697
7c513058 3698 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3699}
3700
3701static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3702 unsigned int pgbase, unsigned int pglen)
3703{
3704 struct nfs4_exception exception = { };
3705 int err;
3706 do {
c1578b76
TM		 3707 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3708 trace_nfs4_readlink(inode, err);
3709 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3710 &exception);
3711 } while (exception.retry);
3712 return err;
3713}
3714
1da177e4 3715/*
8867fe58 3716 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3717 */
1da177e4
LT		 3718static int
3719nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3720 int flags)
1da177e4 3721{
aa9c2669 3722 struct nfs4_label l, *ilabel = NULL;
8867fe58 3723 struct nfs_open_context *ctx;
1da177e4 3724 struct nfs4_state *state;
1da177e4
LT		 3725 int status = 0;
3726
8867fe58
MS		 3727 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3728 if (IS_ERR(ctx))
3729 return PTR_ERR(ctx);
3730
aa9c2669
DQ		 3731 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3732
a8a5da99 3733 sattr->ia_mode &= ~current_umask();
c5c3fb5f 3734 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 3735 if (IS_ERR(state)) {
3736 status = PTR_ERR(state);
c0204fd2 3737 goto out;
1da177e4 3738 }
1da177e4 3739out:
aa9c2669 3740 nfs4_label_release_security(ilabel);
8867fe58 3741 put_nfs_open_context(ctx);
1da177e4
LT		 3742 return status;
3743}
3744
3745static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3746{
16e42959 3747 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3748 struct nfs_removeargs args = {
1da177e4 3749 .fh = NFS_FH(dir),
26fe5750 3750 .name = *name,
16e42959 3751 };
4fdc17b2 3752 struct nfs_removeres res = {
16e42959 3753 .server = server,
1da177e4 3754 };
1da177e4 3755 struct rpc_message msg = {
4fdc17b2
TM		 3756 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3757 .rpc_argp = &args,
3758 .rpc_resp = &res,
1da177e4 3759 };
778d2817 3760 int status;
1da177e4 3761
7c513058 3762 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3763 if (status == 0)
16e42959 3764 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3765 return status;
3766}
3767
3768static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3769{
3770 struct nfs4_exception exception = { };
3771 int err;
3772 do {
078ea3df
TM		 3773 err = _nfs4_proc_remove(dir, name);
3774 trace_nfs4_remove(dir, name, err);
3775 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3776 &exception);
3777 } while (exception.retry);
3778 return err;
3779}
3780
e4eff1a6 3781static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3782{
e4eff1a6
TM		 3783 struct nfs_server *server = NFS_SERVER(dir);
3784 struct nfs_removeargs *args = msg->rpc_argp;
3785 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3786
e4eff1a6 3787 res->server = server;
1da177e4 3788 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3789 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3790
3791 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3792}
3793
34e137cc
BS		 3794static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3795{
d9afbd1b
TM		 3796 nfs4_setup_sequence(NFS_SERVER(data->dir),
3797 &data->args.seq_args,
3798 &data->res.seq_res,
3799 task);
1da177e4
LT		 3800}
3801
e4eff1a6 3802static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3803{
078ea3df
TM		 3804 struct nfs_unlinkdata *data = task->tk_calldata;
3805 struct nfs_removeres *res = &data->res;
e4eff1a6 3806
14516c3a
TM		 3807 if (!nfs4_sequence_done(task, &res->seq_res))
3808 return 0;
8478eaa1
N		 3809 if (nfs4_async_handle_error(task, res->server, NULL,
3810 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3811 return 0;
3812 update_changeattr(dir, &res->cinfo);
e4eff1a6 3813 return 1;
1da177e4
LT		 3814}
3815
d3d4152a
JL		 3816static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3817{
3818 struct nfs_server *server = NFS_SERVER(dir);
3819 struct nfs_renameargs *arg = msg->rpc_argp;
3820 struct nfs_renameres *res = msg->rpc_resp;
3821
3822 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3823 res->server = server;
a9c92d6b 3824 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3825}
3826
c6bfa1a1
BS		 3827static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3828{
d9afbd1b
TM		 3829 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3830 &data->args.seq_args,
3831 &data->res.seq_res,
3832 task);
d3d4152a
JL		 3833}
3834
3835static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3836 struct inode *new_dir)
3837{
fbc6f7c2
TM		 3838 struct nfs_renamedata *data = task->tk_calldata;
3839 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3840
3841 if (!nfs4_sequence_done(task, &res->seq_res))
3842 return 0;
8478eaa1 3843 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3844 return 0;
3845
3846 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3847 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3848 return 1;
3849}
3850
1da177e4
LT		 3851static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3852{
91ba2eee 3853 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3854 struct nfs4_link_arg arg = {
3855 .fh = NFS_FH(inode),
3856 .dir_fh = NFS_FH(dir),
3857 .name = name,
91ba2eee
TM		 3858 .bitmask = server->attr_bitmask,
3859 };
91ba2eee
TM		 3860 struct nfs4_link_res res = {
3861 .server = server,
1775fd3e 3862 .label = NULL,
1da177e4 3863 };
1da177e4
LT		 3864 struct rpc_message msg = {
3865 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3866 .rpc_argp = &arg,
91ba2eee 3867 .rpc_resp = &res,
1da177e4 3868 };
136f2627
TM		 3869 int status = -ENOMEM;
3870
3871 res.fattr = nfs_alloc_fattr();
778d2817 3872 if (res.fattr == NULL)
136f2627 3873 goto out;
1da177e4 3874
14c43f76
DQ		 3875 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3876 if (IS_ERR(res.label)) {
3877 status = PTR_ERR(res.label);
3878 goto out;
3879 }
aa9c2669 3880 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3881
7c513058 3882 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3883 if (!status) {
3884 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3885 status = nfs_post_op_update_inode(inode, res.fattr);
3886 if (!status)
3887 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3888 }
14c43f76
DQ		 3889
3890
3891 nfs4_label_free(res.label);
3892
136f2627 3893out:
136f2627 3894 nfs_free_fattr(res.fattr);
1da177e4
LT		 3895 return status;
3896}
3897
3898static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3899{
3900 struct nfs4_exception exception = { };
3901 int err;
3902 do {
3903 err = nfs4_handle_exception(NFS_SERVER(inode),
3904 _nfs4_proc_link(inode, dir, name),
3905 &exception);
3906 } while (exception.retry);
3907 return err;
3908}
3909
57dc9a57
TM		 3910struct nfs4_createdata {
3911 struct rpc_message msg;
3912 struct nfs4_create_arg arg;
3913 struct nfs4_create_res res;
3914 struct nfs_fh fh;
3915 struct nfs_fattr fattr;
1775fd3e 3916 struct nfs4_label *label;
57dc9a57
TM		 3917};
3918
3919static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3920 struct qstr *name, struct iattr *sattr, u32 ftype)
3921{
3922 struct nfs4_createdata *data;
3923
3924 data = kzalloc(sizeof(*data), GFP_KERNEL);
3925 if (data != NULL) {
3926 struct nfs_server *server = NFS_SERVER(dir);
3927
14c43f76
DQ		 3928 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3929 if (IS_ERR(data->label))
3930 goto out_free;
3931
57dc9a57
TM		 3932 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3933 data->msg.rpc_argp = &data->arg;
3934 data->msg.rpc_resp = &data->res;
3935 data->arg.dir_fh = NFS_FH(dir);
3936 data->arg.server = server;
3937 data->arg.name = name;
3938 data->arg.attrs = sattr;
3939 data->arg.ftype = ftype;
aa9c2669 3940 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3941 data->res.server = server;
3942 data->res.fh = &data->fh;
3943 data->res.fattr = &data->fattr;
1775fd3e 3944 data->res.label = data->label;
57dc9a57 3945 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3946 }
3947 return data;
14c43f76
DQ		 3948out_free:
3949 kfree(data);
3950 return NULL;
57dc9a57
TM		 3951}
3952
3953static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3954{
7c513058 3955 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3956 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3957 if (status == 0) {
3958 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3959 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3960 }
3961 return status;
3962}
3963
3964static void nfs4_free_createdata(struct nfs4_createdata *data)
3965{
14c43f76 3966 nfs4_label_free(data->label);
57dc9a57
TM		 3967 kfree(data);
3968}
3969
4f390c15 3970static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3971 struct page *page, unsigned int len, struct iattr *sattr,
3972 struct nfs4_label *label)
1da177e4 3973{
57dc9a57
TM		 3974 struct nfs4_createdata *data;
3975 int status = -ENAMETOOLONG;
1da177e4 3976
94a6d753 3977 if (len > NFS4_MAXPATHLEN)
57dc9a57 3978 goto out;
4f390c15 3979
57dc9a57
TM		 3980 status = -ENOMEM;
3981 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3982 if (data == NULL)
3983 goto out;
3984
3985 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3986 data->arg.u.symlink.pages = &page;
3987 data->arg.u.symlink.len = len;
1775fd3e 3988 data->arg.label = label;
1da177e4 3989
57dc9a57
TM		 3990 status = nfs4_do_create(dir, dentry, data);
3991
3992 nfs4_free_createdata(data);
3993out:
1da177e4
LT		 3994 return status;
3995}
3996
4f390c15 3997static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3998 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3999{
4000 struct nfs4_exception exception = { };
aa9c2669 4001 struct nfs4_label l, *label = NULL;
1da177e4 4002 int err;
aa9c2669
DQ		 4003
4004 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4005
1da177e4 4006 do {
078ea3df
TM		 4007 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4008 trace_nfs4_symlink(dir, &dentry->d_name, err);
4009 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4010 &exception);
4011 } while (exception.retry);
aa9c2669
DQ		 4012
4013 nfs4_label_release_security(label);
1da177e4
LT		 4014 return err;
4015}
4016
4017static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 4018 struct iattr *sattr, struct nfs4_label *label)
1da177e4 4019{
57dc9a57
TM		 4020 struct nfs4_createdata *data;
4021 int status = -ENOMEM;
1da177e4 4022
57dc9a57
TM		 4023 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4024 if (data == NULL)
4025 goto out;
4026
1775fd3e 4027 data->arg.label = label;
57dc9a57
TM		 4028 status = nfs4_do_create(dir, dentry, data);
4029
4030 nfs4_free_createdata(data);
4031out:
1da177e4
LT		 4032 return status;
4033}
4034
4035static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4036 struct iattr *sattr)
4037{
4038 struct nfs4_exception exception = { };
aa9c2669 4039 struct nfs4_label l, *label = NULL;
1da177e4 4040 int err;
a8a5da99 4041
aa9c2669
DQ		 4042 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4043
a8a5da99 4044 sattr->ia_mode &= ~current_umask();
1da177e4 4045 do {
078ea3df
TM		 4046 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4047 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4048 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4049 &exception);
4050 } while (exception.retry);
aa9c2669
DQ		 4051 nfs4_label_release_security(label);
4052
1da177e4
LT		 4053 return err;
4054}
4055
4056static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4057 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4 4058{
2b0143b5 4059 struct inode *dir = d_inode(dentry);
1da177e4
LT		 4060 struct nfs4_readdir_arg args = {
4061 .fh = NFS_FH(dir),
56e4ebf8 4062 .pages = pages,
1da177e4
LT		 4063 .pgbase = 0,
4064 .count = count,
2b0143b5 4065 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 4066 .plus = plus,
1da177e4
LT		 4067 };
4068 struct nfs4_readdir_res res;
4069 struct rpc_message msg = {
4070 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4071 .rpc_argp = &args,
4072 .rpc_resp = &res,
4073 .rpc_cred = cred,
4074 };
4075 int status;
4076
6de1472f
AV		 4077 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4078 dentry,
eadf4598 4079 (unsigned long long)cookie);
c3f52af3 4080 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 4081 res.pgbase = args.pgbase;
7c513058 4082 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 4083 if (status >= 0) {
c3f52af3 4084 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 4085 status += args.pgbase;
4086 }
c4812998
TM		 4087
4088 nfs_invalidate_atime(dir);
4089
3110ff80 4090 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 4091 return status;
4092}
4093
4094static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4095 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 4096{
4097 struct nfs4_exception exception = { };
4098 int err;
4099 do {
c1578b76
TM		 4100 err = _nfs4_proc_readdir(dentry, cred, cookie,
4101 pages, count, plus);
2b0143b5
DH		 4102 trace_nfs4_readdir(d_inode(dentry), err);
4103 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 4104 &exception);
4105 } while (exception.retry);
4106 return err;
4107}
4108
4109static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 4110 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 4111{
57dc9a57
TM		 4112 struct nfs4_createdata *data;
4113 int mode = sattr->ia_mode;
4114 int status = -ENOMEM;
1da177e4 4115
57dc9a57
TM		 4116 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4117 if (data == NULL)
4118 goto out;
4119
1da177e4 4120 if (S_ISFIFO(mode))
57dc9a57 4121 data->arg.ftype = NF4FIFO;
1da177e4 4122 else if (S_ISBLK(mode)) {
57dc9a57
TM		 4123 data->arg.ftype = NF4BLK;
4124 data->arg.u.device.specdata1 = MAJOR(rdev);
4125 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 4126 }
4127 else if (S_ISCHR(mode)) {
57dc9a57
TM		 4128 data->arg.ftype = NF4CHR;
4129 data->arg.u.device.specdata1 = MAJOR(rdev);
4130 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 4131 } else if (!S_ISSOCK(mode)) {
4132 status = -EINVAL;
4133 goto out_free;
1da177e4 4134 }
1775fd3e 4135
aa9c2669 4136 data->arg.label = label;
57dc9a57 4137 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 4138out_free:
57dc9a57
TM		 4139 nfs4_free_createdata(data);
4140out:
1da177e4
LT		 4141 return status;
4142}
4143
4144static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4145 struct iattr *sattr, dev_t rdev)
4146{
4147 struct nfs4_exception exception = { };
aa9c2669 4148 struct nfs4_label l, *label = NULL;
1da177e4 4149 int err;
a8a5da99 4150
aa9c2669
DQ		 4151 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4152
a8a5da99 4153 sattr->ia_mode &= ~current_umask();
1da177e4 4154 do {
078ea3df
TM		 4155 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4156 trace_nfs4_mknod(dir, &dentry->d_name, err);
4157 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4158 &exception);
4159 } while (exception.retry);
aa9c2669
DQ		 4160
4161 nfs4_label_release_security(label);
4162
1da177e4
LT		 4163 return err;
4164}
4165
4166static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4167 struct nfs_fsstat *fsstat)
4168{
4169 struct nfs4_statfs_arg args = {
4170 .fh = fhandle,
4171 .bitmask = server->attr_bitmask,
4172 };
24ad148a
BH		 4173 struct nfs4_statfs_res res = {
4174 .fsstat = fsstat,
4175 };
1da177e4
LT		 4176 struct rpc_message msg = {
4177 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4178 .rpc_argp = &args,
24ad148a 4179 .rpc_resp = &res,
1da177e4
LT		 4180 };
4181
0e574af1 4182 nfs_fattr_init(fsstat->fattr);
7c513058 4183 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4184}
4185
4186static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4187{
4188 struct nfs4_exception exception = { };
4189 int err;
4190 do {
4191 err = nfs4_handle_exception(server,
4192 _nfs4_proc_statfs(server, fhandle, fsstat),
4193 &exception);
4194 } while (exception.retry);
4195 return err;
4196}
4197
4198static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4199 struct nfs_fsinfo *fsinfo)
4200{
4201 struct nfs4_fsinfo_arg args = {
4202 .fh = fhandle,
4203 .bitmask = server->attr_bitmask,
4204 };
3dda5e43
BH		 4205 struct nfs4_fsinfo_res res = {
4206 .fsinfo = fsinfo,
4207 };
1da177e4
LT		 4208 struct rpc_message msg = {
4209 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4210 .rpc_argp = &args,
3dda5e43 4211 .rpc_resp = &res,
1da177e4
LT		 4212 };
4213
7c513058 4214 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4215}
4216
4217static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4218{
4219 struct nfs4_exception exception = { };
83ca7f5a 4220 unsigned long now = jiffies;
1da177e4
LT		 4221 int err;
4222
4223 do {
83ca7f5a 4224 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4225 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 4226 if (err == 0) {
4227 struct nfs_client *clp = server->nfs_client;
4228
4229 spin_lock(&clp->cl_lock);
4230 clp->cl_lease_time = fsinfo->lease_time * HZ;
4231 clp->cl_last_renewal = now;
4232 spin_unlock(&clp->cl_lock);
4233 break;
4234 }
4235 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4236 } while (exception.retry);
4237 return err;
4238}
4239
4240static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4241{
e38eb650
BS		 4242 int error;
4243
0e574af1 4244 nfs_fattr_init(fsinfo->fattr);
e38eb650 4245 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4246 if (error == 0) {
4247 /* block layout checks this! */
4248 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4249 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4250 }
e38eb650
BS		 4251
4252 return error;
1da177e4
LT		 4253}
4254
4255static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4256 struct nfs_pathconf *pathconf)
4257{
4258 struct nfs4_pathconf_arg args = {
4259 .fh = fhandle,
4260 .bitmask = server->attr_bitmask,
4261 };
d45b2989
BH		 4262 struct nfs4_pathconf_res res = {
4263 .pathconf = pathconf,
4264 };
1da177e4
LT		 4265 struct rpc_message msg = {
4266 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4267 .rpc_argp = &args,
d45b2989 4268 .rpc_resp = &res,
1da177e4
LT		 4269 };
4270
4271 /* None of the pathconf attributes are mandatory to implement */
4272 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4273 memset(pathconf, 0, sizeof(*pathconf));
4274 return 0;
4275 }
4276
0e574af1 4277 nfs_fattr_init(pathconf->fattr);
7c513058 4278 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4279}
4280
4281static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4282 struct nfs_pathconf *pathconf)
4283{
4284 struct nfs4_exception exception = { };
4285 int err;
4286
4287 do {
4288 err = nfs4_handle_exception(server,
4289 _nfs4_proc_pathconf(server, fhandle, pathconf),
4290 &exception);
4291 } while (exception.retry);
4292 return err;
4293}
4294
5521abfd 4295int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4296 const struct nfs_open_context *ctx,
4297 const struct nfs_lock_context *l_ctx,
4298 fmode_t fmode)
4299{
4300 const struct nfs_lockowner *lockowner = NULL;
4301
4302 if (l_ctx != NULL)
4303 lockowner = &l_ctx->lockowner;
5521abfd 4304 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4305}
4306EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4307
5521abfd
TM		 4308static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4309 const struct nfs_open_context *ctx,
4310 const struct nfs_lock_context *l_ctx,
4311 fmode_t fmode)
4312{
4313 nfs4_stateid current_stateid;
4314
e1253be0
TM		 4315 /* If the current stateid represents a lost lock, then exit */
4316 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4317 return true;
5521abfd
TM		 4318 return nfs4_stateid_match(stateid, &current_stateid);
4319}
4320
4321static bool nfs4_error_stateid_expired(int err)
4322{
4323 switch (err) {
4324 case -NFS4ERR_DELEG_REVOKED:
4325 case -NFS4ERR_ADMIN_REVOKED:
4326 case -NFS4ERR_BAD_STATEID:
4327 case -NFS4ERR_STALE_STATEID:
4328 case -NFS4ERR_OLD_STATEID:
4329 case -NFS4ERR_OPENMODE:
4330 case -NFS4ERR_EXPIRED:
4331 return true;
4332 }
4333 return false;
4334}
4335
d45f60c6 4336void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4337{
d45f60c6 4338 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4339}
4340
d45f60c6 4341static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4342{
d45f60c6 4343 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4344
d45f60c6
WAA		 4345 trace_nfs4_read(hdr, task->tk_status);
4346 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4347 hdr->args.context->state,
4348 NULL) == -EAGAIN) {
d00c5d43 4349 rpc_restart_call_prepare(task);
ec06c096 4350 return -EAGAIN;
1da177e4 4351 }
8850df99 4352
d45f60c6 4353 __nfs4_read_done_cb(hdr);
1da177e4 4354 if (task->tk_status > 0)
d45f60c6 4355 renew_lease(server, hdr->timestamp);
ec06c096 4356 return 0;
1da177e4
LT		 4357}
4358
5521abfd 4359static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4360 struct nfs_pgio_args *args)
5521abfd
TM		 4361{
4362
4363 if (!nfs4_error_stateid_expired(task->tk_status) ||
4364 nfs4_stateid_is_current(&args->stateid,
4365 args->context,
4366 args->lock_context,
4367 FMODE_READ))
4368 return false;
4369 rpc_restart_call_prepare(task);
4370 return true;
4371}
4372
d45f60c6 4373static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4374{
4375
4376 dprintk("--> %s\n", __func__);
4377
d45f60c6 4378 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4379 return -EAGAIN;
d45f60c6 4380 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4381 return -EAGAIN;
d45f60c6
WAA		 4382 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4383 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4384}
4385
d45f60c6
WAA		 4386static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4387 struct rpc_message *msg)
1da177e4 4388{
d45f60c6
WAA		 4389 hdr->timestamp = jiffies;
4390 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4391 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4392 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4393}
4394
d45f60c6
WAA		 4395static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4396 struct nfs_pgio_header *hdr)
ea7c3303 4397{
d45f60c6
WAA		 4398 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4399 &hdr->args.seq_args,
4400 &hdr->res.seq_res,
9b206149 4401 task))
ef1820f9 4402 return 0;
d45f60c6
WAA		 4403 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4404 hdr->args.lock_context,
4405 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4406 return -EIO;
d45f60c6 4407 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4408 return -EIO;
4409 return 0;
1da177e4
LT		 4410}
4411
d45f60c6
WAA		 4412static int nfs4_write_done_cb(struct rpc_task *task,
4413 struct nfs_pgio_header *hdr)
1da177e4 4414{
d45f60c6 4415 struct inode *inode = hdr->inode;
8478eaa1 4416
d45f60c6
WAA		 4417 trace_nfs4_write(hdr, task->tk_status);
4418 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4419 hdr->args.context->state,
4420 NULL) == -EAGAIN) {
d00c5d43 4421 rpc_restart_call_prepare(task);
788e7a89 4422 return -EAGAIN;
1da177e4 4423 }
4f9838c7 4424 if (task->tk_status >= 0) {
d45f60c6 4425 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4426 nfs_writeback_update_inode(hdr);
4f9838c7 4427 }
788e7a89 4428 return 0;
1da177e4
LT		 4429}
4430
5521abfd 4431static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4432 struct nfs_pgio_args *args)
5521abfd
TM		 4433{
4434
4435 if (!nfs4_error_stateid_expired(task->tk_status) ||
4436 nfs4_stateid_is_current(&args->stateid,
4437 args->context,
4438 args->lock_context,
4439 FMODE_WRITE))
4440 return false;
4441 rpc_restart_call_prepare(task);
4442 return true;
4443}
4444
d45f60c6 4445static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4446{
d45f60c6 4447 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4448 return -EAGAIN;
d45f60c6 4449 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4450 return -EAGAIN;
d45f60c6
WAA		 4451 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4452 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4453}
4454
5a37f851 4455static
d45f60c6 4456bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4457{
5a37f851 4458 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4459 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4460 return false;
4461 /* Otherwise, request attributes if and only if we don't hold
4462 * a delegation
4463 */
011e2a7f 4464 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4465}
a69aef14 4466
d45f60c6
WAA		 4467static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4468 struct rpc_message *msg)
1da177e4 4469{
d45f60c6 4470 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4471
d45f60c6
WAA		 4472 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4473 hdr->args.bitmask = NULL;
4474 hdr->res.fattr = NULL;
7ffd1064 4475 } else
d45f60c6 4476 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4477
d45f60c6
WAA		 4478 if (!hdr->pgio_done_cb)
4479 hdr->pgio_done_cb = nfs4_write_done_cb;
4480 hdr->res.server = server;
4481 hdr->timestamp = jiffies;
1da177e4 4482
bdc7f021 4483 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4484 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4485}
4486
0b7c0153 4487static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4488{
d9afbd1b
TM		 4489 nfs4_setup_sequence(NFS_SERVER(data->inode),
4490 &data->args.seq_args,
4491 &data->res.seq_res,
4492 task);
1da177e4
LT		 4493}
4494
0b7c0153 4495static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4496{
1da177e4 4497 struct inode *inode = data->inode;
14516c3a 4498
cc668ab3 4499 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4500 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4501 NULL, NULL) == -EAGAIN) {
d00c5d43 4502 rpc_restart_call_prepare(task);
788e7a89 4503 return -EAGAIN;
1da177e4 4504 }
788e7a89 4505 return 0;
1da177e4
LT		 4506}
4507
0b7c0153 4508static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4509{
4510 if (!nfs4_sequence_done(task, &data->res.seq_res))
4511 return -EAGAIN;
0b7c0153 4512 return data->commit_done_cb(task, data);
5f452431
FI		 4513}
4514
0b7c0153 4515static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4516{
788e7a89 4517 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4518
0b7c0153
FI		 4519 if (data->commit_done_cb == NULL)
4520 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4521 data->res.server = server;
bdc7f021 4522 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4523 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4524}
4525
9bc4e3ca
CL		 4526struct nfs4_renewdata {
4527 struct nfs_client *client;
4528 unsigned long timestamp;
4529};
4530
1da177e4
LT		 4531/*
4532 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4533 * standalone procedure for queueing an asynchronous RENEW.
4534 */
9bc4e3ca 4535static void nfs4_renew_release(void *calldata)
dc96aef9 4536{
9bc4e3ca
CL		 4537 struct nfs4_renewdata *data = calldata;
4538 struct nfs_client *clp = data->client;
dc96aef9 4539
0851de06
AB		 4540 if (atomic_read(&clp->cl_count) > 1)
4541 nfs4_schedule_state_renewal(clp);
4542 nfs_put_client(clp);
9bc4e3ca 4543 kfree(data);
dc96aef9
AB		 4544}
4545
9bc4e3ca 4546static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4547{
9bc4e3ca
CL		 4548 struct nfs4_renewdata *data = calldata;
4549 struct nfs_client *clp = data->client;
4550 unsigned long timestamp = data->timestamp;
1da177e4 4551
c6d01c6f 4552 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4553 switch (task->tk_status) {
4554 case 0:
4555 break;
4556 case -NFS4ERR_LEASE_MOVED:
4557 nfs4_schedule_lease_moved_recovery(clp);
4558 break;
4559 default:
95baa25c 4560 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4561 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4562 return;
4563 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4564 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4565 return;
4566 }
4567 nfs4_schedule_path_down_recovery(clp);
1da177e4 4568 }
452e9352 4569 do_renew_lease(clp, timestamp);
1da177e4
LT		 4570}
4571
963d8fe5
TM		 4572static const struct rpc_call_ops nfs4_renew_ops = {
4573 .rpc_call_done = nfs4_renew_done,
dc96aef9 4574 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4575};
4576
2f60ea6b 4577static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4578{
4579 struct rpc_message msg = {
4580 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4581 .rpc_argp = clp,
b4454fe1 4582 .rpc_cred = cred,
1da177e4 4583 };
9bc4e3ca 4584 struct nfs4_renewdata *data;
1da177e4 4585
2f60ea6b
TM		 4586 if (renew_flags == 0)
4587 return 0;
0851de06
AB		 4588 if (!atomic_inc_not_zero(&clp->cl_count))
4589 return -EIO;
b569ad34 4590 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4591 if (data == NULL)
4592 return -ENOMEM;
4593 data->client = clp;
4594 data->timestamp = jiffies;
bc7a05ca 4595 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4596 &nfs4_renew_ops, data);
1da177e4
LT		 4597}
4598
8534d4ec 4599static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4600{
4601 struct rpc_message msg = {
4602 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4603 .rpc_argp = clp,
b4454fe1 4604 .rpc_cred = cred,
1da177e4
LT		 4605 };
4606 unsigned long now = jiffies;
4607 int status;
4608
bc7a05ca 4609 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4610 if (status < 0)
4611 return status;
452e9352 4612 do_renew_lease(clp, now);
1da177e4
LT		 4613 return 0;
4614}
4615
aa1870af
BF		 4616static inline int nfs4_server_supports_acls(struct nfs_server *server)
4617{
7dd7d959 4618 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4619}
4620
21f498c2
TM		 4621/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4622 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4623 * the stack.
4624 */
21f498c2 4625#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4626
e9e3d724 4627static int buf_to_pages_noslab(const void *buf, size_t buflen,
8fbcf237 4628 struct page **pages)
e9e3d724
NH		 4629{
4630 struct page *newpage, **spages;
4631 int rc = 0;
4632 size_t len;
4633 spages = pages;
4634
4635 do {
21f498c2 4636 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4637 newpage = alloc_page(GFP_KERNEL);
4638
4639 if (newpage == NULL)
4640 goto unwind;
4641 memcpy(page_address(newpage), buf, len);
4642 buf += len;
4643 buflen -= len;
4644 *pages++ = newpage;
4645 rc++;
4646 } while (buflen != 0);
4647
4648 return rc;
4649
4650unwind:
4651 for(; rc > 0; rc--)
4652 __free_page(spages[rc-1]);
4653 return -ENOMEM;
4654}
4655
e50a1c2e
BF		 4656struct nfs4_cached_acl {
4657 int cached;
4658 size_t len;
3e9d4154 4659 char data[0];
e50a1c2e
BF		 4660};
4661
4662static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4663{
4664 struct nfs_inode *nfsi = NFS_I(inode);
4665
4666 spin_lock(&inode->i_lock);
4667 kfree(nfsi->nfs4_acl);
4668 nfsi->nfs4_acl = acl;
4669 spin_unlock(&inode->i_lock);
4670}
4671
4672static void nfs4_zap_acl_attr(struct inode *inode)
4673{
4674 nfs4_set_cached_acl(inode, NULL);
4675}
4676
4677static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4678{
4679 struct nfs_inode *nfsi = NFS_I(inode);
4680 struct nfs4_cached_acl *acl;
4681 int ret = -ENOENT;
4682
4683 spin_lock(&inode->i_lock);
4684 acl = nfsi->nfs4_acl;
4685 if (acl == NULL)
4686 goto out;
4687 if (buf == NULL) /* user is just asking for length */
4688 goto out_len;
4689 if (acl->cached == 0)
4690 goto out;
4691 ret = -ERANGE; /* see getxattr(2) man page */
4692 if (acl->len > buflen)
4693 goto out;
4694 memcpy(buf, acl->data, acl->len);
4695out_len:
4696 ret = acl->len;
4697out:
4698 spin_unlock(&inode->i_lock);
4699 return ret;
4700}
4701
5794d21e 4702static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4703{
4704 struct nfs4_cached_acl *acl;
b291f1b1 4705 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4706
1f1ea6c2 4707 if (buflen <= PAGE_SIZE) {
b291f1b1 4708 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4709 if (acl == NULL)
4710 goto out;
4711 acl->cached = 1;
5794d21e 4712 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4713 } else {
4714 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4715 if (acl == NULL)
4716 goto out;
4717 acl->cached = 0;
4718 }
4719 acl->len = acl_len;
4720out:
4721 nfs4_set_cached_acl(inode, acl);
4722}
4723
bf118a34
AA		 4724/*
4725 * The getxattr API returns the required buffer length when called with a
4726 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4727 * the required buf. On a NULL buf, we send a page of data to the server
4728 * guessing that the ACL request can be serviced by a page. If so, we cache
4729 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4730 * the cache. If not so, we throw away the page, and cache the required
4731 * length. The next getxattr call will then produce another round trip to
4732 * the server, this time with the input buf of the required size.
4733 */
16b4289c 4734static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4735{
bf118a34 4736 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4737 struct nfs_getaclargs args = {
4738 .fh = NFS_FH(inode),
4739 .acl_pages = pages,
4740 .acl_len = buflen,
4741 };
663c79b3
BH		 4742 struct nfs_getaclres res = {
4743 .acl_len = buflen,
4744 };
aa1870af
BF		 4745 struct rpc_message msg = {
4746 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4747 .rpc_argp = &args,
663c79b3 4748 .rpc_resp = &res,
aa1870af 4749 };
21f498c2
TM		 4750 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4751 int ret = -ENOMEM, i;
aa1870af 4752
bf118a34
AA		 4753 /* As long as we're doing a round trip to the server anyway,
4754 * let's be prepared for a page of acl data. */
4755 if (npages == 0)
4756 npages = 1;
21f498c2
TM		 4757 if (npages > ARRAY_SIZE(pages))
4758 return -ERANGE;
5a006899 4759
bf118a34
AA		 4760 for (i = 0; i < npages; i++) {
4761 pages[i] = alloc_page(GFP_KERNEL);
4762 if (!pages[i])
4763 goto out_free;
e50a1c2e 4764 }
5a006899
SP		 4765
4766 /* for decoding across pages */
4767 res.acl_scratch = alloc_page(GFP_KERNEL);
4768 if (!res.acl_scratch)
4769 goto out_free;
4770
bf118a34 4771 args.acl_len = npages * PAGE_SIZE;
5a006899 4772
de040bec 4773 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4774 __func__, buf, buflen, npages, args.acl_len);
4775 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4776 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4777 if (ret)
4778 goto out_free;
bf118a34 4779
1f1ea6c2
TM		 4780 /* Handle the case where the passed-in buffer is too short */
4781 if (res.acl_flags & NFS4_ACL_TRUNC) {
4782 /* Did the user only issue a request for the acl length? */
4783 if (buf == NULL)
4784 goto out_ok;
e50a1c2e 4785 ret = -ERANGE;
1f1ea6c2 4786 goto out_free;
e50a1c2e 4787 }
1f1ea6c2 4788 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4789 if (buf) {
4790 if (res.acl_len > buflen) {
4791 ret = -ERANGE;
4792 goto out_free;
4793 }
1f1ea6c2 4794 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4795 }
1f1ea6c2
TM		 4796out_ok:
4797 ret = res.acl_len;
e50a1c2e 4798out_free:
bf118a34
AA		 4799 for (i = 0; i < npages; i++)
4800 if (pages[i])
4801 __free_page(pages[i]);
331818f1
TM		 4802 if (res.acl_scratch)
4803 __free_page(res.acl_scratch);
aa1870af
BF		 4804 return ret;
4805}
4806
16b4289c
TM		 4807static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4808{
4809 struct nfs4_exception exception = { };
4810 ssize_t ret;
4811 do {
4812 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4813 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4814 if (ret >= 0)
4815 break;
4816 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4817 } while (exception.retry);
4818 return ret;
4819}
4820
e50a1c2e
BF		 4821static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4822{
4823 struct nfs_server *server = NFS_SERVER(inode);
4824 int ret;
4825
4826 if (!nfs4_server_supports_acls(server))
4827 return -EOPNOTSUPP;
4828 ret = nfs_revalidate_inode(server, inode);
4829 if (ret < 0)
4830 return ret;
08a22b39
AK		 4831 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4832 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4833 ret = nfs4_read_cached_acl(inode, buf, buflen);
4834 if (ret != -ENOENT)
bf118a34
AA		 4835 /* -ENOENT is returned if there is no ACL or if there is an ACL
4836 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4837 return ret;
4838 return nfs4_get_acl_uncached(inode, buf, buflen);
4839}
4840
16b4289c 4841static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4842{
4843 struct nfs_server *server = NFS_SERVER(inode);
4844 struct page *pages[NFS4ACL_MAXPAGES];
4845 struct nfs_setaclargs arg = {
4846 .fh = NFS_FH(inode),
4847 .acl_pages = pages,
4848 .acl_len = buflen,
4849 };
73c403a9 4850 struct nfs_setaclres res;
4b580ee3
BF		 4851 struct rpc_message msg = {
4852 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4853 .rpc_argp = &arg,
73c403a9 4854 .rpc_resp = &res,
4b580ee3 4855 };
21f498c2 4856 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4857 int ret, i;
4b580ee3
BF		 4858
4859 if (!nfs4_server_supports_acls(server))
4860 return -EOPNOTSUPP;
21f498c2
TM		 4861 if (npages > ARRAY_SIZE(pages))
4862 return -ERANGE;
8fbcf237 4863 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
e9e3d724
NH		 4864 if (i < 0)
4865 return i;
57ec14c5 4866 nfs4_inode_return_delegation(inode);
7c513058 4867 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4868
4869 /*
4870 * Free each page after tx, so the only ref left is
4871 * held by the network stack
4872 */
4873 for (; i > 0; i--)
4874 put_page(pages[i-1]);
4875
08a22b39
AK		 4876 /*
4877 * Acl update can result in inode attribute update.
4878 * so mark the attribute cache invalid.
4879 */
4880 spin_lock(&inode->i_lock);
4881 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4882 spin_unlock(&inode->i_lock);
f41f7418
TM		 4883 nfs_access_zap_cache(inode);
4884 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4885 return ret;
4886}
4887
16b4289c
TM		 4888static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4889{
4890 struct nfs4_exception exception = { };
4891 int err;
4892 do {
c1578b76
TM		 4893 err = __nfs4_proc_set_acl(inode, buf, buflen);
4894 trace_nfs4_set_acl(inode, err);
4895 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4896 &exception);
4897 } while (exception.retry);
4898 return err;
4899}
4900
aa9c2669
DQ		 4901#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4902static int _nfs4_get_security_label(struct inode *inode, void *buf,
4903 size_t buflen)
4904{
4905 struct nfs_server *server = NFS_SERVER(inode);
4906 struct nfs_fattr fattr;
4907 struct nfs4_label label = {0, 0, buflen, buf};
4908
4909 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4910 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4911 .fh = NFS_FH(inode),
4912 .bitmask = bitmask,
4913 };
4914 struct nfs4_getattr_res res = {
4915 .fattr = &fattr,
4916 .label = &label,
4917 .server = server,
4918 };
4919 struct rpc_message msg = {
4920 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4921 .rpc_argp = &arg,
aa9c2669
DQ		 4922 .rpc_resp = &res,
4923 };
4924 int ret;
4925
4926 nfs_fattr_init(&fattr);
4927
fcb63a9b 4928 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4929 if (ret)
4930 return ret;
4931 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4932 return -ENOENT;
4933 if (buflen < label.len)
4934 return -ERANGE;
4935 return 0;
4936}
4937
4938static int nfs4_get_security_label(struct inode *inode, void *buf,
4939 size_t buflen)
4940{
4941 struct nfs4_exception exception = { };
4942 int err;
4943
4944 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4945 return -EOPNOTSUPP;
4946
4947 do {
c1578b76
TM		 4948 err = _nfs4_get_security_label(inode, buf, buflen);
4949 trace_nfs4_get_security_label(inode, err);
4950 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4951 &exception);
4952 } while (exception.retry);
4953 return err;
4954}
4955
4956static int _nfs4_do_set_security_label(struct inode *inode,
4957 struct nfs4_label *ilabel,
4958 struct nfs_fattr *fattr,
4959 struct nfs4_label *olabel)
4960{
4961
4962 struct iattr sattr = {0};
4963 struct nfs_server *server = NFS_SERVER(inode);
4964 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4965 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4966 .fh = NFS_FH(inode),
4967 .iap = &sattr,
4968 .server = server,
4969 .bitmask = bitmask,
4970 .label = ilabel,
4971 };
4972 struct nfs_setattrres res = {
4973 .fattr = fattr,
4974 .label = olabel,
4975 .server = server,
4976 };
4977 struct rpc_message msg = {
4978 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4979 .rpc_argp = &arg,
aa9c2669
DQ		 4980 .rpc_resp = &res,
4981 };
4982 int status;
4983
12207f69 4984 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4985
12207f69 4986 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4987 if (status)
4988 dprintk("%s failed: %d\n", __func__, status);
4989
4990 return status;
4991}
4992
4993static int nfs4_do_set_security_label(struct inode *inode,
4994 struct nfs4_label *ilabel,
4995 struct nfs_fattr *fattr,
4996 struct nfs4_label *olabel)
4997{
4998 struct nfs4_exception exception = { };
4999 int err;
5000
5001 do {
c1578b76
TM		 5002 err = _nfs4_do_set_security_label(inode, ilabel,
5003 fattr, olabel);
5004 trace_nfs4_set_security_label(inode, err);
5005 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5006 &exception);
5007 } while (exception.retry);
5008 return err;
5009}
5010
5011static int
5012nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
5013{
5014 struct nfs4_label ilabel, *olabel = NULL;
5015 struct nfs_fattr fattr;
5016 struct rpc_cred *cred;
2b0143b5 5017 struct inode *inode = d_inode(dentry);
aa9c2669
DQ		 5018 int status;
5019
5020 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5021 return -EOPNOTSUPP;
5022
5023 nfs_fattr_init(&fattr);
5024
5025 ilabel.pi = 0;
5026 ilabel.lfs = 0;
5027 ilabel.label = (char *)buf;
5028 ilabel.len = buflen;
5029
5030 cred = rpc_lookup_cred();
5031 if (IS_ERR(cred))
5032 return PTR_ERR(cred);
5033
5034 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5035 if (IS_ERR(olabel)) {
5036 status = -PTR_ERR(olabel);
5037 goto out;
5038 }
5039
5040 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5041 if (status == 0)
5042 nfs_setsecurity(inode, &fattr, olabel);
5043
5044 nfs4_label_free(olabel);
5045out:
5046 put_rpccred(cred);
5047 return status;
5048}
5049#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5050
5051
f092075d
CL		 5052static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5053 nfs4_verifier *bootverf)
cd93710e
CL		 5054{
5055 __be32 verf[2];
5056
2c820d9a
CL		 5057 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5058 /* An impossible timestamp guarantees this value
5059 * will never match a generated boot time. */
5060 verf[0] = 0;
17f26b12 5061 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 5062 } else {
f092075d 5063 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 5064 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
5065 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 5066 }
cd93710e
CL		 5067 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5068}
5069
a3192688
JL		 5070static int
5071nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 5072{
a3192688
JL		 5073 size_t len;
5074 char *str;
e984a55a 5075
ceb3a16c 5076 if (clp->cl_owner_id != NULL)
a3192688 5077 return 0;
4a3e5779 5078
a3192688 5079 rcu_read_lock();
4a70316c 5080 len = 14 + strlen(clp->cl_ipaddr) + 1 +
a3192688
JL		 5081 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5082 1 +
5083 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5084 1;
5085 rcu_read_unlock();
5086
5087 if (len > NFS4_OPAQUE_LIMIT + 1)
5088 return -EINVAL;
5089
5090 /*
5091 * Since this string is allocated at mount time, and held until the
5092 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5093 * about a memory-reclaim deadlock.
5094 */
5095 str = kmalloc(len, GFP_KERNEL);
5096 if (!str)
5097 return -ENOMEM;
ceb3a16c 5098
e984a55a 5099 rcu_read_lock();
f2dd436e 5100 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
a3192688
JL		 5101 clp->cl_ipaddr,
5102 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5103 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5104 rcu_read_unlock();
a3192688 5105
a3192688
JL		 5106 clp->cl_owner_id = str;
5107 return 0;
e984a55a
CL		 5108}
5109
873e3851
JL		 5110static int
5111nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5112{
873e3851
JL		 5113 size_t len;
5114 char *str;
5115
5116 len = 10 + 10 + 1 + 10 + 1 +
5117 strlen(nfs4_client_id_uniquifier) + 1 +
5118 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5119
5120 if (len > NFS4_OPAQUE_LIMIT + 1)
5121 return -EINVAL;
5122
5123 /*
5124 * Since this string is allocated at mount time, and held until the
5125 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5126 * about a memory-reclaim deadlock.
5127 */
5128 str = kmalloc(len, GFP_KERNEL);
5129 if (!str)
5130 return -ENOMEM;
5131
f2dd436e 5132 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
873e3851
JL		 5133 clp->rpc_ops->version, clp->cl_minorversion,
5134 nfs4_client_id_uniquifier,
5135 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5136 clp->cl_owner_id = str;
5137 return 0;
5138}
5139
5140static int
5141nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5142{
873e3851
JL		 5143 size_t len;
5144 char *str;
ceb3a16c
TM		 5145
5146 if (clp->cl_owner_id != NULL)
873e3851 5147 return 0;
6f2ea7f2
CL		 5148
5149 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5150 return nfs4_init_uniquifier_client_string(clp);
5151
5152 len = 10 + 10 + 1 + 10 + 1 +
5153 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5154
5155 if (len > NFS4_OPAQUE_LIMIT + 1)
5156 return -EINVAL;
5157
5158 /*
5159 * Since this string is allocated at mount time, and held until the
5160 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5161 * about a memory-reclaim deadlock.
5162 */
5163 str = kmalloc(len, GFP_KERNEL);
5164 if (!str)
5165 return -ENOMEM;
5166
f2dd436e 5167 scnprintf(str, len, "Linux NFSv%u.%u %s",
873e3851
JL		 5168 clp->rpc_ops->version, clp->cl_minorversion,
5169 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5170 clp->cl_owner_id = str;
5171 return 0;
e984a55a
CL		 5172}
5173
706cb8db
CL		 5174/*
5175 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5176 * services. Advertise one based on the address family of the
5177 * clientaddr.
5178 */
5179static unsigned int
5180nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5181{
5182 if (strchr(clp->cl_ipaddr, ':') != NULL)
5183 return scnprintf(buf, len, "tcp6");
5184 else
5185 return scnprintf(buf, len, "tcp");
5186}
5187
f11b2a1c
JL		 5188static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5189{
5190 struct nfs4_setclientid *sc = calldata;
5191
5192 if (task->tk_status == 0)
5193 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5194}
5195
5196static const struct rpc_call_ops nfs4_setclientid_ops = {
5197 .rpc_call_done = nfs4_setclientid_done,
5198};
5199
6bbb4ae8
CL		 5200/**
5201 * nfs4_proc_setclientid - Negotiate client ID
5202 * @clp: state data structure
5203 * @program: RPC program for NFSv4 callback service
5204 * @port: IP port number for NFS4 callback service
5205 * @cred: RPC credential to use for this call
5206 * @res: where to place the result
5207 *
5208 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5209 */
bb8b27e5
TM		 5210int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5211 unsigned short port, struct rpc_cred *cred,
5212 struct nfs4_setclientid_res *res)
1da177e4
LT		 5213{
5214 nfs4_verifier sc_verifier;
5215 struct nfs4_setclientid setclientid = {
5216 .sc_verifier = &sc_verifier,
5217 .sc_prog = program,
3a6bb738 5218 .sc_clnt = clp,
1da177e4
LT		 5219 };
5220 struct rpc_message msg = {
5221 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5222 .rpc_argp = &setclientid,
bb8b27e5 5223 .rpc_resp = res,
286d7d6a 5224 .rpc_cred = cred,
1da177e4 5225 };
f11b2a1c
JL		 5226 struct rpc_task *task;
5227 struct rpc_task_setup task_setup_data = {
5228 .rpc_client = clp->cl_rpcclient,
5229 .rpc_message = &msg,
5230 .callback_ops = &nfs4_setclientid_ops,
5231 .callback_data = &setclientid,
5232 .flags = RPC_TASK_TIMEOUT,
5233 };
6bbb4ae8 5234 int status;
1da177e4 5235
de734831 5236 /* nfs_client_id4 */
f092075d 5237 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5238
5239 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5240 status = nfs4_init_uniform_client_string(clp);
5241 else
a3192688 5242 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5243
5244 if (status)
5245 goto out;
3a6bb738 5246
de734831 5247 /* cb_client4 */
706cb8db
CL		 5248 setclientid.sc_netid_len =
5249 nfs4_init_callback_netid(clp,
5250 setclientid.sc_netid,
5251 sizeof(setclientid.sc_netid));
de734831 5252 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5253 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5254 clp->cl_ipaddr, port >> 8, port & 255);
5255
3a6bb738 5256 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5257 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5258 clp->cl_owner_id);
f11b2a1c
JL		 5259 task = rpc_run_task(&task_setup_data);
5260 if (IS_ERR(task)) {
5261 status = PTR_ERR(task);
5262 goto out;
5263 }
5264 status = task->tk_status;
5265 if (setclientid.sc_cred) {
5266 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5267 put_rpccred(setclientid.sc_cred);
5268 }
5269 rpc_put_task(task);
5270out:
c6d01c6f 5271 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5272 dprintk("NFS reply setclientid: %d\n", status);
5273 return status;
1da177e4
LT		 5274}
5275
6bbb4ae8
CL		 5276/**
5277 * nfs4_proc_setclientid_confirm - Confirm client ID
5278 * @clp: state data structure
5279 * @res: result of a previous SETCLIENTID
5280 * @cred: RPC credential to use for this call
5281 *
5282 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5283 */
fd954ae1 5284int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5285 struct nfs4_setclientid_res *arg,
5286 struct rpc_cred *cred)
1da177e4 5287{
1da177e4
LT		 5288 struct rpc_message msg = {
5289 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5290 .rpc_argp = arg,
286d7d6a 5291 .rpc_cred = cred,
1da177e4 5292 };
1da177e4
LT		 5293 int status;
5294
6bbb4ae8
CL		 5295 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5296 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5297 clp->cl_clientid);
1bd714f2 5298 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5299 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5300 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5301 return status;
5302}
5303
fe650407
TM		 5304struct nfs4_delegreturndata {
5305 struct nfs4_delegreturnargs args;
fa178f29 5306 struct nfs4_delegreturnres res;
fe650407
TM		 5307 struct nfs_fh fh;
5308 nfs4_stateid stateid;
26e976a8 5309 unsigned long timestamp;
fa178f29 5310 struct nfs_fattr fattr;
fe650407 5311 int rpc_status;
039b756a
PT		 5312 struct inode *inode;
5313 bool roc;
5314 u32 roc_barrier;
fe650407
TM		 5315};
5316
fe650407
TM		 5317static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5318{
5319 struct nfs4_delegreturndata *data = calldata;
938e1010 5320
14516c3a
TM		 5321 if (!nfs4_sequence_done(task, &data->res.seq_res))
5322 return;
938e1010 5323
ca8acf8d 5324 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5325 switch (task->tk_status) {
79708861 5326 case 0:
fa178f29 5327 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5328 case -NFS4ERR_ADMIN_REVOKED:
5329 case -NFS4ERR_DELEG_REVOKED:
5330 case -NFS4ERR_BAD_STATEID:
5331 case -NFS4ERR_OLD_STATEID:
5332 case -NFS4ERR_STALE_STATEID:
5333 case -NFS4ERR_EXPIRED:
5334 task->tk_status = 0;
039b756a
PT		 5335 if (data->roc)
5336 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5337 break;
79708861 5338 default:
8478eaa1
N		 5339 if (nfs4_async_handle_error(task, data->res.server,
5340 NULL, NULL) == -EAGAIN) {
d00c5d43 5341 rpc_restart_call_prepare(task);
79708861
RL		 5342 return;
5343 }
5344 }
5345 data->rpc_status = task->tk_status;
fe650407
TM		 5346}
5347
5348static void nfs4_delegreturn_release(void *calldata)
5349{
039b756a 5350 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5351 struct inode *inode = data->inode;
039b756a 5352
ea7c38fe
TM		 5353 if (inode) {
5354 if (data->roc)
5355 pnfs_roc_release(inode);
5356 nfs_iput_and_deactive(inode);
5357 }
fe650407
TM		 5358 kfree(calldata);
5359}
5360
938e1010
AA		 5361static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5362{
5363 struct nfs4_delegreturndata *d_data;
5364
5365 d_data = (struct nfs4_delegreturndata *)data;
5366
500d701f
PT		 5367 if (nfs4_wait_on_layoutreturn(d_data->inode, task))
5368 return;
5369
4ff376fe
TM		 5370 if (d_data->roc)
5371 pnfs_roc_get_barrier(d_data->inode, &d_data->roc_barrier);
039b756a 5372
d9afbd1b
TM		 5373 nfs4_setup_sequence(d_data->res.server,
5374 &d_data->args.seq_args,
5375 &d_data->res.seq_res,
5376 task);
938e1010 5377}
938e1010 5378
c8d149f3 5379static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5380 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5381 .rpc_call_done = nfs4_delegreturn_done,
5382 .rpc_release = nfs4_delegreturn_release,
5383};
5384
e6f81075 5385static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5386{
5387 struct nfs4_delegreturndata *data;
fa178f29 5388 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5389 struct rpc_task *task;
5138fde0
TM		 5390 struct rpc_message msg = {
5391 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5392 .rpc_cred = cred,
5393 };
c970aa85
TM		 5394 struct rpc_task_setup task_setup_data = {
5395 .rpc_client = server->client,
5138fde0 5396 .rpc_message = &msg,
c970aa85
TM		 5397 .callback_ops = &nfs4_delegreturn_ops,
5398 .flags = RPC_TASK_ASYNC,
5399 };
e6f81075 5400 int status = 0;
fe650407 5401
8535b2be 5402 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5403 if (data == NULL)
5404 return -ENOMEM;
a9c92d6b 5405 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
99ade3c7
AE		 5406
5407 nfs4_state_protect(server->nfs_client,
5408 NFS_SP4_MACH_CRED_CLEANUP,
5409 &task_setup_data.rpc_client, &msg);
5410
fe650407
TM		 5411 data->args.fhandle = &data->fh;
5412 data->args.stateid = &data->stateid;
9e907fec 5413 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5414 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5415 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5416 data->res.fattr = &data->fattr;
5417 data->res.server = server;
5138fde0 5418 nfs_fattr_init(data->res.fattr);
26e976a8 5419 data->timestamp = jiffies;
fe650407 5420 data->rpc_status = 0;
ea7c38fe
TM		 5421 data->inode = nfs_igrab_and_active(inode);
5422 if (data->inode)
5423 data->roc = nfs4_roc(inode);
fe650407 5424
c970aa85 5425 task_setup_data.callback_data = data;
1174dd1f
TM		 5426 msg.rpc_argp = &data->args;
5427 msg.rpc_resp = &data->res;
c970aa85 5428 task = rpc_run_task(&task_setup_data);
7a1218a2 5429 if (IS_ERR(task))
fe650407 5430 return PTR_ERR(task);
e6f81075
TM		 5431 if (!issync)
5432 goto out;
fe650407 5433 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5434 if (status != 0)
5435 goto out;
5436 status = data->rpc_status;
e144cbcc
TM		 5437 if (status == 0)
5438 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5439 else
5440 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5441out:
e6b3c4db 5442 rpc_put_task(task);
fe650407 5443 return status;
1da177e4
LT		 5444}
5445
e6f81075 5446int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5447{
5448 struct nfs_server *server = NFS_SERVER(inode);
5449 struct nfs4_exception exception = { };
5450 int err;
5451 do {
e6f81075 5452 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
48c9579a 5453 trace_nfs4_delegreturn(inode, stateid, err);
1da177e4
LT		 5454 switch (err) {
5455 case -NFS4ERR_STALE_STATEID:
5456 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5457 case 0:
5458 return 0;
5459 }
5460 err = nfs4_handle_exception(server, err, &exception);
5461 } while (exception.retry);
5462 return err;
5463}
5464
5465#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5466#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5467
5468/*
5469 * sleep, with exponential backoff, and retry the LOCK operation.
5470 */
5471static unsigned long
5472nfs4_set_lock_task_retry(unsigned long timeout)
5473{
416ad3c9 5474 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5475 timeout <<= 1;
5476 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5477 return NFS4_LOCK_MAXTIMEOUT;
5478 return timeout;
5479}
5480
1da177e4
LT		 5481static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5482{
5483 struct inode *inode = state->inode;
5484 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5485 struct nfs_client *clp = server->nfs_client;
911d1aaf 5486 struct nfs_lockt_args arg = {
1da177e4 5487 .fh = NFS_FH(inode),
911d1aaf 5488 .fl = request,
1da177e4 5489 };
911d1aaf
TM		 5490 struct nfs_lockt_res res = {
5491 .denied = request,
1da177e4
LT		 5492 };
5493 struct rpc_message msg = {
5494 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5495 .rpc_argp = &arg,
5496 .rpc_resp = &res,
5497 .rpc_cred = state->owner->so_cred,
5498 };
1da177e4
LT		 5499 struct nfs4_lock_state *lsp;
5500 int status;
5501
911d1aaf 5502 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5503 status = nfs4_set_lock_state(state, request);
5504 if (status != 0)
5505 goto out;
5506 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5507 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5508 arg.lock_owner.s_dev = server->s_dev;
7c513058 5509 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5510 switch (status) {
5511 case 0:
5512 request->fl_type = F_UNLCK;
5513 break;
5514 case -NFS4ERR_DENIED:
5515 status = 0;
1da177e4 5516 }
70cc6487 5517 request->fl_ops->fl_release_private(request);
a6f951dd 5518 request->fl_ops = NULL;
8d0a8a9d 5519out:
1da177e4
LT		 5520 return status;
5521}
5522
5523static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5524{
5525 struct nfs4_exception exception = { };
5526 int err;
5527
5528 do {
d1b748a5
TM		 5529 err = _nfs4_proc_getlk(state, cmd, request);
5530 trace_nfs4_get_lock(request, state, cmd, err);
5531 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5532 &exception);
5533 } while (exception.retry);
5534 return err;
5535}
5536
83bfff23 5537static int do_vfs_lock(struct inode *inode, struct file_lock *fl)
1da177e4 5538{
4f656367 5539 return locks_lock_inode_wait(inode, fl);
1da177e4
LT		 5540}
5541
faf5f49c 5542struct nfs4_unlockdata {
911d1aaf
TM		 5543 struct nfs_locku_args arg;
5544 struct nfs_locku_res res;
faf5f49c
TM		 5545 struct nfs4_lock_state *lsp;
5546 struct nfs_open_context *ctx;
911d1aaf 5547 struct file_lock fl;
516285eb 5548 struct nfs_server *server;
26e976a8 5549 unsigned long timestamp;
faf5f49c
TM		 5550};
5551
911d1aaf
TM		 5552static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5553 struct nfs_open_context *ctx,
5554 struct nfs4_lock_state *lsp,
5555 struct nfs_seqid *seqid)
5556{
5557 struct nfs4_unlockdata *p;
5558 struct inode *inode = lsp->ls_state->inode;
5559
8535b2be 5560 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5561 if (p == NULL)
5562 return NULL;
5563 p->arg.fh = NFS_FH(inode);
5564 p->arg.fl = &p->fl;
5565 p->arg.seqid = seqid;
c1d51931 5566 p->res.seqid = seqid;
911d1aaf
TM		 5567 p->lsp = lsp;
5568 atomic_inc(&lsp->ls_count);
5569 /* Ensure we don't close file until we're done freeing locks! */
5570 p->ctx = get_nfs_open_context(ctx);
5571 memcpy(&p->fl, fl, sizeof(p->fl));
5572 p->server = NFS_SERVER(inode);
5573 return p;
5574}
5575
06f814a3 5576static void nfs4_locku_release_calldata(void *data)
faf5f49c 5577{
963d8fe5 5578 struct nfs4_unlockdata *calldata = data;
911d1aaf 5579 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5580 nfs4_put_lock_state(calldata->lsp);
5581 put_nfs_open_context(calldata->ctx);
5582 kfree(calldata);
faf5f49c
TM		 5583}
5584
963d8fe5 5585static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5586{
963d8fe5 5587 struct nfs4_unlockdata *calldata = data;
faf5f49c 5588
14516c3a
TM		 5589 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5590 return;
faf5f49c
TM		 5591 switch (task->tk_status) {
5592 case 0:
26e976a8 5593 renew_lease(calldata->server, calldata->timestamp);
83bfff23 5594 do_vfs_lock(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 5595 if (nfs4_update_lock_stateid(calldata->lsp,
5596 &calldata->res.stateid))
5597 break;
9e33bed5
TM		 5598 case -NFS4ERR_BAD_STATEID:
5599 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5600 case -NFS4ERR_STALE_STATEID:
5601 case -NFS4ERR_EXPIRED:
425c1d4e
TM		 5602 if (!nfs4_stateid_match(&calldata->arg.stateid,
5603 &calldata->lsp->ls_stateid))
5604 rpc_restart_call_prepare(task);
faf5f49c
TM		 5605 break;
5606 default:
8478eaa1
N		 5607 if (nfs4_async_handle_error(task, calldata->server,
5608 NULL, NULL) == -EAGAIN)
d00c5d43 5609 rpc_restart_call_prepare(task);
faf5f49c 5610 }
2b1bc308 5611 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5612}
5613
4ce70ada 5614static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5615{
4ce70ada 5616 struct nfs4_unlockdata *calldata = data;
faf5f49c 5617
911d1aaf 5618 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5619 goto out_wait;
425c1d4e 5620 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5621 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5622 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5623 goto out_no_action;
faf5f49c 5624 }
26e976a8 5625 calldata->timestamp = jiffies;
035168ab 5626 if (nfs4_setup_sequence(calldata->server,
a893693c 5627 &calldata->arg.seq_args,
2240a9e2
TM		 5628 &calldata->res.seq_res,
5629 task) != 0)
5630 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5631 return;
5632out_no_action:
5633 task->tk_action = NULL;
5634out_wait:
5635 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5636}
5637
963d8fe5 5638static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5639 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5640 .rpc_call_done = nfs4_locku_done,
06f814a3 5641 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5642};
5643
a5d16a4d
TM		 5644static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5645 struct nfs_open_context *ctx,
5646 struct nfs4_lock_state *lsp,
5647 struct nfs_seqid *seqid)
5648{
5649 struct nfs4_unlockdata *data;
5138fde0
TM		 5650 struct rpc_message msg = {
5651 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5652 .rpc_cred = ctx->cred,
5653 };
c970aa85
TM		 5654 struct rpc_task_setup task_setup_data = {
5655 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5656 .rpc_message = &msg,
c970aa85 5657 .callback_ops = &nfs4_locku_ops,
101070ca 5658 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5659 .flags = RPC_TASK_ASYNC,
5660 };
a5d16a4d 5661
fa940720
WAA		 5662 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5663 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5664
137d6aca
FF		 5665 /* Ensure this is an unlock - when canceling a lock, the
5666 * canceled lock is passed in, and it won't be an unlock.
5667 */
5668 fl->fl_type = F_UNLCK;
5669
a5d16a4d
TM		 5670 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5671 if (data == NULL) {
5672 nfs_free_seqid(seqid);
5673 return ERR_PTR(-ENOMEM);
5674 }
5675
a9c92d6b 5676 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5677 msg.rpc_argp = &data->arg;
5678 msg.rpc_resp = &data->res;
c970aa85
TM		 5679 task_setup_data.callback_data = data;
5680 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5681}
5682
faf5f49c
TM		 5683static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5684{
65b62a29
TM		 5685 struct inode *inode = state->inode;
5686 struct nfs4_state_owner *sp = state->owner;
5687 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5688 struct nfs_seqid *seqid;
1da177e4 5689 struct nfs4_lock_state *lsp;
06f814a3 5690 struct rpc_task *task;
b4019c0e 5691 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 5692 int status = 0;
536ff0f8 5693 unsigned char fl_flags = request->fl_flags;
faf5f49c 5694
8d0a8a9d 5695 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5696 /* Unlock _before_ we do the RPC call */
5697 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5698 /* Exclude nfs_delegation_claim_locks() */
5699 mutex_lock(&sp->so_delegreturn_mutex);
5700 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 5701 down_read(&nfsi->rwsem);
83bfff23 5702 if (do_vfs_lock(inode, request) == -ENOENT) {
19e03c57 5703 up_read(&nfsi->rwsem);
65b62a29 5704 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5705 goto out;
19e03c57
TM		 5706 }
5707 up_read(&nfsi->rwsem);
65b62a29 5708 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5709 if (status != 0)
9b073574
TM		 5710 goto out;
5711 /* Is this a delegated lock? */
8d0a8a9d 5712 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5713 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5714 goto out;
b4019c0e
TM		 5715 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5716 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5717 status = -ENOMEM;
badc76dd 5718 if (IS_ERR(seqid))
9b073574 5719 goto out;
cd3758e3 5720 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5721 status = PTR_ERR(task);
5722 if (IS_ERR(task))
9b073574 5723 goto out;
a5d16a4d 5724 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5725 rpc_put_task(task);
9b073574 5726out:
536ff0f8 5727 request->fl_flags = fl_flags;
d1b748a5 5728 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5729 return status;
5730}
5731
a5d16a4d
TM		 5732struct nfs4_lockdata {
5733 struct nfs_lock_args arg;
5734 struct nfs_lock_res res;
5735 struct nfs4_lock_state *lsp;
5736 struct nfs_open_context *ctx;
5737 struct file_lock fl;
26e976a8 5738 unsigned long timestamp;
a5d16a4d
TM		 5739 int rpc_status;
5740 int cancelled;
66179efe 5741 struct nfs_server *server;
a5d16a4d
TM		 5742};
5743
5744static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5745 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5746 gfp_t gfp_mask)
1da177e4 5747{
a5d16a4d
TM		 5748 struct nfs4_lockdata *p;
5749 struct inode *inode = lsp->ls_state->inode;
1da177e4 5750 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 5751 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 5752
8535b2be 5753 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5754 if (p == NULL)
5755 return NULL;
5756
5757 p->arg.fh = NFS_FH(inode);
5758 p->arg.fl = &p->fl;
8535b2be 5759 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 5760 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 5761 goto out_free;
b4019c0e
TM		 5762 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5763 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 5764 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 5765 goto out_free_seqid;
7539bbab 5766 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5767 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5768 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5769 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5770 p->lsp = lsp;
66179efe 5771 p->server = server;
a5d16a4d
TM		 5772 atomic_inc(&lsp->ls_count);
5773 p->ctx = get_nfs_open_context(ctx);
feaff8e5 5774 get_file(fl->fl_file);
a5d16a4d
TM		 5775 memcpy(&p->fl, fl, sizeof(p->fl));
5776 return p;
2f74c0a0
TM		 5777out_free_seqid:
5778 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5779out_free:
5780 kfree(p);
5781 return NULL;
5782}
5783
5784static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5785{
5786 struct nfs4_lockdata *data = calldata;
5787 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5788
3110ff80 5789 dprintk("%s: begin!\n", __func__);
2f74c0a0 5790 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5791 goto out_wait;
a5d16a4d 5792 /* Do we need to do an open_to_lock_owner? */
6b447539 5793 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 5794 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5795 goto out_release_lock_seqid;
8fe72bac 5796 }
425c1d4e
TM		 5797 nfs4_stateid_copy(&data->arg.open_stateid,
5798 &state->open_stateid);
a5d16a4d 5799 data->arg.new_lock_owner = 1;
c1d51931 5800 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 5801 } else {
2f74c0a0 5802 data->arg.new_lock_owner = 0;
425c1d4e
TM		 5803 nfs4_stateid_copy(&data->arg.lock_stateid,
5804 &data->lsp->ls_stateid);
5805 }
5d422301
TM		 5806 if (!nfs4_valid_open_stateid(state)) {
5807 data->rpc_status = -EBADF;
5808 task->tk_action = NULL;
5809 goto out_release_open_seqid;
5810 }
26e976a8 5811 data->timestamp = jiffies;
035168ab
TM		 5812 if (nfs4_setup_sequence(data->server,
5813 &data->arg.seq_args,
2240a9e2 5814 &data->res.seq_res,
d9afbd1b 5815 task) == 0)
66179efe 5816 return;
5d422301 5817out_release_open_seqid:
2240a9e2
TM		 5818 nfs_release_seqid(data->arg.open_seqid);
5819out_release_lock_seqid:
5820 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5821out_wait:
5822 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5823 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5824}
5825
a5d16a4d
TM		 5826static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5827{
5828 struct nfs4_lockdata *data = calldata;
39071e6f 5829 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 5830
3110ff80 5831 dprintk("%s: begin!\n", __func__);
a5d16a4d 5832
14516c3a
TM		 5833 if (!nfs4_sequence_done(task, &data->res.seq_res))
5834 return;
66179efe 5835
a5d16a4d 5836 data->rpc_status = task->tk_status;
425c1d4e
TM		 5837 switch (task->tk_status) {
5838 case 0:
2b0143b5 5839 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 5840 data->timestamp);
c69899a1
TM		 5841 if (data->arg.new_lock) {
5842 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
83bfff23 5843 if (do_vfs_lock(lsp->ls_state->inode, &data->fl) < 0) {
c69899a1
TM		 5844 rpc_restart_call_prepare(task);
5845 break;
5846 }
5847 }
39071e6f
TM		 5848 if (data->arg.new_lock_owner != 0) {
5849 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5850 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5851 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5852 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5853 rpc_restart_call_prepare(task);
425c1d4e
TM		 5854 break;
5855 case -NFS4ERR_BAD_STATEID:
5856 case -NFS4ERR_OLD_STATEID:
5857 case -NFS4ERR_STALE_STATEID:
5858 case -NFS4ERR_EXPIRED:
5859 if (data->arg.new_lock_owner != 0) {
5860 if (!nfs4_stateid_match(&data->arg.open_stateid,
5861 &lsp->ls_state->open_stateid))
5862 rpc_restart_call_prepare(task);
5863 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5864 &lsp->ls_stateid))
5865 rpc_restart_call_prepare(task);
a5d16a4d 5866 }
3110ff80 5867 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5868}
5869
5870static void nfs4_lock_release(void *calldata)
5871{
5872 struct nfs4_lockdata *data = calldata;
5873
3110ff80 5874 dprintk("%s: begin!\n", __func__);
2f74c0a0 5875 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5876 if (data->cancelled != 0) {
5877 struct rpc_task *task;
5878 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5879 data->arg.lock_seqid);
5880 if (!IS_ERR(task))
bf294b41 5881 rpc_put_task_async(task);
3110ff80 5882 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5883 } else
5884 nfs_free_seqid(data->arg.lock_seqid);
5885 nfs4_put_lock_state(data->lsp);
5886 put_nfs_open_context(data->ctx);
feaff8e5 5887 fput(data->fl.fl_file);
a5d16a4d 5888 kfree(data);
3110ff80 5889 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5890}
5891
5892static const struct rpc_call_ops nfs4_lock_ops = {
5893 .rpc_call_prepare = nfs4_lock_prepare,
5894 .rpc_call_done = nfs4_lock_done,
5895 .rpc_release = nfs4_lock_release,
5896};
5897
2bee72a6
TM		 5898static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5899{
2bee72a6
TM		 5900 switch (error) {
5901 case -NFS4ERR_ADMIN_REVOKED:
5902 case -NFS4ERR_BAD_STATEID:
ecac799a 5903 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5904 if (new_lock_owner != 0 ||
795a88c9 5905 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5906 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5907 break;
5908 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5909 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5910 case -NFS4ERR_EXPIRED:
5911 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5912 };
5913}
5914
afe6c27c 5915static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5916{
5917 struct nfs4_lockdata *data;
5918 struct rpc_task *task;
5138fde0
TM		 5919 struct rpc_message msg = {
5920 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5921 .rpc_cred = state->owner->so_cred,
5922 };
c970aa85
TM		 5923 struct rpc_task_setup task_setup_data = {
5924 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5925 .rpc_message = &msg,
c970aa85 5926 .callback_ops = &nfs4_lock_ops,
101070ca 5927 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5928 .flags = RPC_TASK_ASYNC,
5929 };
a5d16a4d
TM		 5930 int ret;
5931
3110ff80 5932 dprintk("%s: begin!\n", __func__);
cd3758e3 5933 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5934 fl->fl_u.nfs4_fl.owner,
5935 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5936 if (data == NULL)
5937 return -ENOMEM;
5938 if (IS_SETLKW(cmd))
5939 data->arg.block = 1;
a9c92d6b 5940 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5941 msg.rpc_argp = &data->arg;
5942 msg.rpc_resp = &data->res;
c970aa85 5943 task_setup_data.callback_data = data;
8fe72bac
TM		 5944 if (recovery_type > NFS_LOCK_NEW) {
5945 if (recovery_type == NFS_LOCK_RECLAIM)
5946 data->arg.reclaim = NFS_LOCK_RECLAIM;
5947 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 5948 } else
5949 data->arg.new_lock = 1;
c970aa85 5950 task = rpc_run_task(&task_setup_data);
7a1218a2 5951 if (IS_ERR(task))
a5d16a4d 5952 return PTR_ERR(task);
a5d16a4d
TM		 5953 ret = nfs4_wait_for_completion_rpc_task(task);
5954 if (ret == 0) {
5955 ret = data->rpc_status;
2bee72a6
TM		 5956 if (ret)
5957 nfs4_handle_setlk_error(data->server, data->lsp,
5958 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5959 } else
5960 data->cancelled = 1;
e6b3c4db 5961 rpc_put_task(task);
3110ff80 5962 dprintk("%s: done, ret = %d!\n", __func__, ret);
48c9579a 5963 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
a5d16a4d 5964 return ret;
1da177e4
LT		 5965}
5966
5967static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5968{
202b50dc 5969 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5970 struct nfs4_exception exception = {
5971 .inode = state->inode,
5972 };
202b50dc
TM		 5973 int err;
5974
5975 do {
42a2d13e
TM		 5976 /* Cache the lock if possible... */
5977 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5978 return 0;
afe6c27c 5979 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 5980 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5981 break;
5982 nfs4_handle_exception(server, err, &exception);
5983 } while (exception.retry);
5984 return err;
1da177e4
LT		 5985}
5986
5987static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5988{
202b50dc 5989 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5990 struct nfs4_exception exception = {
5991 .inode = state->inode,
5992 };
202b50dc
TM		 5993 int err;
5994
6bfc93ef
TM		 5995 err = nfs4_set_lock_state(state, request);
5996 if (err != 0)
5997 return err;
f6de7a39 5998 if (!recover_lost_locks) {
ef1820f9
N		 5999 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
6000 return 0;
6001 }
202b50dc 6002 do {
42a2d13e
TM		 6003 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6004 return 0;
afe6c27c 6005 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 6006 switch (err) {
6007 default:
6008 goto out;
6009 case -NFS4ERR_GRACE:
6010 case -NFS4ERR_DELAY:
6011 nfs4_handle_exception(server, err, &exception);
6012 err = 0;
6013 }
202b50dc 6014 } while (exception.retry);
a9ed2e25 6015out:
202b50dc 6016 return err;
1da177e4
LT		 6017}
6018
f062eb6c 6019#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 6020/**
6021 * nfs41_check_expired_locks - possibly free a lock stateid
6022 *
6023 * @state: NFSv4 state for an inode
6024 *
6025 * Returns NFS_OK if recovery for this stateid is now finished.
6026 * Otherwise a negative NFS4ERR value is returned.
6027 */
b01dd1d8 6028static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 6029{
eb64cf96 6030 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 6031 struct nfs4_lock_state *lsp;
f062eb6c
BS		 6032 struct nfs_server *server = NFS_SERVER(state->inode);
6033
b01dd1d8 6034 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 6035 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 6036 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
6037
6038 status = nfs41_test_stateid(server,
6039 &lsp->ls_stateid,
6040 cred);
08cb47fa 6041 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 6042 if (status != NFS_OK) {
3e60ffdd
CL		 6043 /* Free the stateid unless the server
6044 * informs us the stateid is unrecognized. */
89af2739
CL		 6045 if (status != -NFS4ERR_BAD_STATEID)
6046 nfs41_free_stateid(server,
ab7cb0df
TM		 6047 &lsp->ls_stateid,
6048 cred);
795a88c9 6049 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 6050 ret = status;
6051 }
6052 }
6053 };
6054
6055 return ret;
6056}
6057
6058static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6059{
6060 int status = NFS_OK;
6061
6062 if (test_bit(LK_STATE_IN_USE, &state->flags))
6063 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 6064 if (status != NFS_OK)
6065 status = nfs4_lock_expired(state, request);
6066 return status;
f062eb6c
BS		 6067}
6068#endif
6069
1da177e4
LT		 6070static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6071{
19e03c57 6072 struct nfs_inode *nfsi = NFS_I(state->inode);
11476e9d 6073 struct nfs4_state_owner *sp = state->owner;
01c3b861 6074 unsigned char fl_flags = request->fl_flags;
8e469ebd 6075 int status = -ENOLCK;
1da177e4 6076
8e469ebd
TM		 6077 if ((fl_flags & FL_POSIX) &&
6078 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6079 goto out;
6bfc93ef 6080 /* Is this a delegated open? */
6bfc93ef
TM		 6081 status = nfs4_set_lock_state(state, request);
6082 if (status != 0)
6083 goto out;
01c3b861 6084 request->fl_flags |= FL_ACCESS;
83bfff23 6085 status = do_vfs_lock(state->inode, request);
01c3b861
TM		 6086 if (status < 0)
6087 goto out;
11476e9d 6088 mutex_lock(&sp->so_delegreturn_mutex);
19e03c57 6089 down_read(&nfsi->rwsem);
01c3b861 6090 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6091 /* Yes: cache locks! */
01c3b861 6092 /* ...but avoid races with delegation recall... */
19e03c57 6093 request->fl_flags = fl_flags & ~FL_SLEEP;
83bfff23 6094 status = do_vfs_lock(state->inode, request);
c69899a1 6095 up_read(&nfsi->rwsem);
11476e9d 6096 mutex_unlock(&sp->so_delegreturn_mutex);
9a99af49 6097 goto out;
9a99af49 6098 }
19e03c57 6099 up_read(&nfsi->rwsem);
11476e9d 6100 mutex_unlock(&sp->so_delegreturn_mutex);
c69899a1 6101 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6102out:
6103 request->fl_flags = fl_flags;
1da177e4
LT		 6104 return status;
6105}
6106
6107static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6108{
a1d0b5ee
TM		 6109 struct nfs4_exception exception = {
6110 .state = state,
05ffe24f 6111 .inode = state->inode,
a1d0b5ee 6112 };
1da177e4
LT		 6113 int err;
6114
6115 do {
965b5d67
TM		 6116 err = _nfs4_proc_setlk(state, cmd, request);
6117 if (err == -NFS4ERR_DENIED)
6118 err = -EAGAIN;
1da177e4 6119 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6120 err, &exception);
1da177e4
LT		 6121 } while (exception.retry);
6122 return err;
6123}
6124
6125static int
6126nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6127{
6128 struct nfs_open_context *ctx;
6129 struct nfs4_state *state;
6130 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6131 int status;
6132
6133 /* verify open state */
cd3758e3 6134 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6135 state = ctx->state;
6136
6137 if (request->fl_start < 0 || request->fl_end < 0)
6138 return -EINVAL;
6139
d953126a
TM		 6140 if (IS_GETLK(cmd)) {
6141 if (state != NULL)
6142 return nfs4_proc_getlk(state, F_GETLK, request);
6143 return 0;
6144 }
1da177e4
LT		 6145
6146 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6147 return -EINVAL;
6148
d953126a
TM		 6149 if (request->fl_type == F_UNLCK) {
6150 if (state != NULL)
6151 return nfs4_proc_unlck(state, cmd, request);
6152 return 0;
6153 }
1da177e4 6154
d953126a
TM		 6155 if (state == NULL)
6156 return -ENOLCK;
55725513
TM		 6157 /*
6158 * Don't rely on the VFS having checked the file open mode,
6159 * since it won't do this for flock() locks.
6160 */
f44106e2 6161 switch (request->fl_type) {
55725513
TM		 6162 case F_RDLCK:
6163 if (!(filp->f_mode & FMODE_READ))
6164 return -EBADF;
6165 break;
6166 case F_WRLCK:
6167 if (!(filp->f_mode & FMODE_WRITE))
6168 return -EBADF;
6169 }
6170
1da177e4
LT		 6171 do {
6172 status = nfs4_proc_setlk(state, cmd, request);
6173 if ((status != -EAGAIN) || IS_SETLK(cmd))
6174 break;
6175 timeout = nfs4_set_lock_task_retry(timeout);
6176 status = -ERESTARTSYS;
6177 if (signalled())
6178 break;
6179 } while(status < 0);
1da177e4
LT		 6180 return status;
6181}
6182
db4f2e63 6183int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6184{
6185 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6186 int err;
6187
6188 err = nfs4_set_lock_state(state, fl);
6189 if (err != 0)
db4f2e63 6190 return err;
4a706fa0 6191 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6192 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6193}
6b3b5496 6194
cf470c3e
TM		 6195struct nfs_release_lockowner_data {
6196 struct nfs4_lock_state *lsp;
5ae67c4f 6197 struct nfs_server *server;
cf470c3e 6198 struct nfs_release_lockowner_args args;
b7e63a10 6199 struct nfs_release_lockowner_res res;
60ea6812 6200 unsigned long timestamp;
cf470c3e
TM		 6201};
6202
fbd4bfd1
CL		 6203static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6204{
6205 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6206 struct nfs_server *server = data->server;
cb04ad2a
PT		 6207 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6208 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6209 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6210 data->timestamp = jiffies;
fbd4bfd1
CL		 6211}
6212
6213static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6214{
6215 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6216 struct nfs_server *server = data->server;
6217
b7e63a10 6218 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6219
6220 switch (task->tk_status) {
6221 case 0:
6222 renew_lease(server, data->timestamp);
6223 break;
6224 case -NFS4ERR_STALE_CLIENTID:
6225 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6226 nfs4_schedule_lease_recovery(server->nfs_client);
6227 break;
60ea6812
CL		 6228 case -NFS4ERR_LEASE_MOVED:
6229 case -NFS4ERR_DELAY:
8478eaa1
N		 6230 if (nfs4_async_handle_error(task, server,
6231 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6232 rpc_restart_call_prepare(task);
6233 }
fbd4bfd1
CL		 6234}
6235
d3c7b7cc
TM		 6236static void nfs4_release_lockowner_release(void *calldata)
6237{
cf470c3e 6238 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6239 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6240 kfree(calldata);
6241}
6242
17280175 6243static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6244 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6245 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6246 .rpc_release = nfs4_release_lockowner_release,
6247};
6248
f1cdae87
JL		 6249static void
6250nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6251{
cf470c3e 6252 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6253 struct rpc_message msg = {
6254 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6255 };
6256
6257 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6258 return;
fbd4bfd1 6259
cf470c3e
TM		 6260 data = kmalloc(sizeof(*data), GFP_NOFS);
6261 if (!data)
f1cdae87 6262 return;
cf470c3e 6263 data->lsp = lsp;
5ae67c4f 6264 data->server = server;
cf470c3e
TM		 6265 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6266 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6267 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6268
cf470c3e 6269 msg.rpc_argp = &data->args;
b7e63a10
TM		 6270 msg.rpc_resp = &data->res;
6271 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6272 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6273}
6274
aa1870af
BF		 6275#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6276
d9a82a04
AG		 6277static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
6278 struct dentry *dentry, const char *key,
64c2ce8b 6279 const void *buf, size_t buflen,
d9a82a04 6280 int flags)
6b3b5496 6281{
2b0143b5 6282 return nfs4_proc_set_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6283}
6284
d9a82a04
AG		 6285static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
6286 struct dentry *dentry, const char *key,
6287 void *buf, size_t buflen)
6b3b5496 6288{
2b0143b5 6289 return nfs4_proc_get_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6290}
6291
764a5c6b 6292static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6b3b5496 6293{
764a5c6b 6294 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6b3b5496
BF		 6295}
6296
c9bccef6 6297#ifdef CONFIG_NFS_V4_SECURITY_LABEL
c9bccef6 6298
d9a82a04
AG		 6299static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
6300 struct dentry *dentry, const char *key,
6301 const void *buf, size_t buflen,
6302 int flags)
c9bccef6
DQ		 6303{
6304 if (security_ismaclabel(key))
6305 return nfs4_set_security_label(dentry, buf, buflen);
6306
6307 return -EOPNOTSUPP;
6308}
6309
d9a82a04
AG		 6310static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
6311 struct dentry *dentry, const char *key,
6312 void *buf, size_t buflen)
c9bccef6
DQ		 6313{
6314 if (security_ismaclabel(key))
2b0143b5 6315 return nfs4_get_security_label(d_inode(dentry), buf, buflen);
c9bccef6
DQ		 6316 return -EOPNOTSUPP;
6317}
6318
c4803c49
AG		 6319static ssize_t
6320nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
c9bccef6 6321{
c4803c49 6322 int len = 0;
c9bccef6 6323
c4803c49
AG		 6324 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
6325 len = security_inode_listsecurity(inode, list, list_len);
6326 if (list_len && len > list_len)
6327 return -ERANGE;
c9bccef6
DQ		 6328 }
6329 return len;
6330}
6331
6332static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6333 .prefix = XATTR_SECURITY_PREFIX,
c9bccef6
DQ		 6334 .get = nfs4_xattr_get_nfs4_label,
6335 .set = nfs4_xattr_set_nfs4_label,
6336};
c9bccef6 6337
c4803c49
AG		 6338#else
6339
6340static ssize_t
6341nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6342{
6343 return 0;
6344}
6345
6346#endif
c9bccef6 6347
533eb461
AA		 6348/*
6349 * nfs_fhget will use either the mounted_on_fileid or the fileid
6350 */
69aaaae1
TM		 6351static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6352{
533eb461
AA		 6353 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6354 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6355 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6356 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6357 return;
6358
6359 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6360 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6361 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6362 fattr->nlink = 2;
6363}
6364
f05d147f
BS		 6365static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6366 const struct qstr *name,
6367 struct nfs4_fs_locations *fs_locations,
6368 struct page *page)
683b57b4
TM		 6369{
6370 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6371 u32 bitmask[3] = {
361e624f 6372 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6373 };
6374 struct nfs4_fs_locations_arg args = {
6375 .dir_fh = NFS_FH(dir),
c228fd3a 6376 .name = name,
683b57b4
TM		 6377 .page = page,
6378 .bitmask = bitmask,
6379 };
22958463
BH		 6380 struct nfs4_fs_locations_res res = {
6381 .fs_locations = fs_locations,
6382 };
683b57b4
TM		 6383 struct rpc_message msg = {
6384 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6385 .rpc_argp = &args,
22958463 6386 .rpc_resp = &res,
683b57b4
TM		 6387 };
6388 int status;
6389
3110ff80 6390 dprintk("%s: start\n", __func__);
533eb461
AA		 6391
6392 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6393 * is not supported */
6394 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6395 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6396 else
6397 bitmask[0] |= FATTR4_WORD0_FILEID;
6398
c228fd3a 6399 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6400 fs_locations->server = server;
830b8e33 6401 fs_locations->nlocations = 0;
f05d147f 6402 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6403 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6404 return status;
6405}
6406
f05d147f
BS		 6407int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6408 const struct qstr *name,
6409 struct nfs4_fs_locations *fs_locations,
6410 struct page *page)
db0a9593
BS		 6411{
6412 struct nfs4_exception exception = { };
6413 int err;
6414 do {
078ea3df
TM		 6415 err = _nfs4_proc_fs_locations(client, dir, name,
6416 fs_locations, page);
6417 trace_nfs4_get_fs_locations(dir, name, err);
6418 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6419 &exception);
6420 } while (exception.retry);
6421 return err;
6422}
6423
b03d735b
CL		 6424/*
6425 * This operation also signals the server that this client is
6426 * performing migration recovery. The server can stop returning
6427 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6428 * appended to this compound to identify the client ID which is
6429 * performing recovery.
6430 */
6431static int _nfs40_proc_get_locations(struct inode *inode,
6432 struct nfs4_fs_locations *locations,
6433 struct page *page, struct rpc_cred *cred)
6434{
6435 struct nfs_server *server = NFS_SERVER(inode);
6436 struct rpc_clnt *clnt = server->client;
6437 u32 bitmask[2] = {
6438 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6439 };
6440 struct nfs4_fs_locations_arg args = {
6441 .clientid = server->nfs_client->cl_clientid,
6442 .fh = NFS_FH(inode),
6443 .page = page,
6444 .bitmask = bitmask,
6445 .migration = 1, /* skip LOOKUP */
6446 .renew = 1, /* append RENEW */
6447 };
6448 struct nfs4_fs_locations_res res = {
6449 .fs_locations = locations,
6450 .migration = 1,
6451 .renew = 1,
6452 };
6453 struct rpc_message msg = {
6454 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6455 .rpc_argp = &args,
6456 .rpc_resp = &res,
6457 .rpc_cred = cred,
6458 };
6459 unsigned long now = jiffies;
6460 int status;
6461
6462 nfs_fattr_init(&locations->fattr);
6463 locations->server = server;
6464 locations->nlocations = 0;
6465
6466 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6467 nfs4_set_sequence_privileged(&args.seq_args);
6468 status = nfs4_call_sync_sequence(clnt, server, &msg,
6469 &args.seq_args, &res.seq_res);
6470 if (status)
6471 return status;
6472
6473 renew_lease(server, now);
6474 return 0;
6475}
6476
6477#ifdef CONFIG_NFS_V4_1
6478
6479/*
6480 * This operation also signals the server that this client is
6481 * performing migration recovery. The server can stop asserting
6482 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6483 * performing this operation is identified in the SEQUENCE
6484 * operation in this compound.
6485 *
6486 * When the client supports GETATTR(fs_locations_info), it can
6487 * be plumbed in here.
6488 */
6489static int _nfs41_proc_get_locations(struct inode *inode,
6490 struct nfs4_fs_locations *locations,
6491 struct page *page, struct rpc_cred *cred)
6492{
6493 struct nfs_server *server = NFS_SERVER(inode);
6494 struct rpc_clnt *clnt = server->client;
6495 u32 bitmask[2] = {
6496 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6497 };
6498 struct nfs4_fs_locations_arg args = {
6499 .fh = NFS_FH(inode),
6500 .page = page,
6501 .bitmask = bitmask,
6502 .migration = 1, /* skip LOOKUP */
6503 };
6504 struct nfs4_fs_locations_res res = {
6505 .fs_locations = locations,
6506 .migration = 1,
6507 };
6508 struct rpc_message msg = {
6509 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6510 .rpc_argp = &args,
6511 .rpc_resp = &res,
6512 .rpc_cred = cred,
6513 };
6514 int status;
6515
6516 nfs_fattr_init(&locations->fattr);
6517 locations->server = server;
6518 locations->nlocations = 0;
6519
6520 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6521 nfs4_set_sequence_privileged(&args.seq_args);
6522 status = nfs4_call_sync_sequence(clnt, server, &msg,
6523 &args.seq_args, &res.seq_res);
6524 if (status == NFS4_OK &&
6525 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6526 status = -NFS4ERR_LEASE_MOVED;
6527 return status;
6528}
6529
6530#endif /* CONFIG_NFS_V4_1 */
6531
6532/**
6533 * nfs4_proc_get_locations - discover locations for a migrated FSID
6534 * @inode: inode on FSID that is migrating
6535 * @locations: result of query
6536 * @page: buffer
6537 * @cred: credential to use for this operation
6538 *
6539 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6540 * operation failed, or a negative errno if a local error occurred.
6541 *
6542 * On success, "locations" is filled in, but if the server has
6543 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6544 * asserted.
6545 *
6546 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6547 * from this client that require migration recovery.
6548 */
6549int nfs4_proc_get_locations(struct inode *inode,
6550 struct nfs4_fs_locations *locations,
6551 struct page *page, struct rpc_cred *cred)
6552{
6553 struct nfs_server *server = NFS_SERVER(inode);
6554 struct nfs_client *clp = server->nfs_client;
6555 const struct nfs4_mig_recovery_ops *ops =
6556 clp->cl_mvops->mig_recovery_ops;
6557 struct nfs4_exception exception = { };
6558 int status;
6559
6560 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6561 (unsigned long long)server->fsid.major,
6562 (unsigned long long)server->fsid.minor,
6563 clp->cl_hostname);
6564 nfs_display_fhandle(NFS_FH(inode), __func__);
6565
6566 do {
6567 status = ops->get_locations(inode, locations, page, cred);
6568 if (status != -NFS4ERR_DELAY)
6569 break;
6570 nfs4_handle_exception(server, status, &exception);
6571 } while (exception.retry);
6572 return status;
6573}
6574
44c99933
CL		 6575/*
6576 * This operation also signals the server that this client is
6577 * performing "lease moved" recovery. The server can stop
6578 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6579 * is appended to this compound to identify the client ID which is
6580 * performing recovery.
6581 */
6582static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6583{
6584 struct nfs_server *server = NFS_SERVER(inode);
6585 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6586 struct rpc_clnt *clnt = server->client;
6587 struct nfs4_fsid_present_arg args = {
6588 .fh = NFS_FH(inode),
6589 .clientid = clp->cl_clientid,
6590 .renew = 1, /* append RENEW */
6591 };
6592 struct nfs4_fsid_present_res res = {
6593 .renew = 1,
6594 };
6595 struct rpc_message msg = {
6596 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6597 .rpc_argp = &args,
6598 .rpc_resp = &res,
6599 .rpc_cred = cred,
6600 };
6601 unsigned long now = jiffies;
6602 int status;
6603
6604 res.fh = nfs_alloc_fhandle();
6605 if (res.fh == NULL)
6606 return -ENOMEM;
6607
6608 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6609 nfs4_set_sequence_privileged(&args.seq_args);
6610 status = nfs4_call_sync_sequence(clnt, server, &msg,
6611 &args.seq_args, &res.seq_res);
6612 nfs_free_fhandle(res.fh);
6613 if (status)
6614 return status;
6615
6616 do_renew_lease(clp, now);
6617 return 0;
6618}
6619
6620#ifdef CONFIG_NFS_V4_1
6621
6622/*
6623 * This operation also signals the server that this client is
6624 * performing "lease moved" recovery. The server can stop asserting
6625 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6626 * this operation is identified in the SEQUENCE operation in this
6627 * compound.
6628 */
6629static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6630{
6631 struct nfs_server *server = NFS_SERVER(inode);
6632 struct rpc_clnt *clnt = server->client;
6633 struct nfs4_fsid_present_arg args = {
6634 .fh = NFS_FH(inode),
6635 };
6636 struct nfs4_fsid_present_res res = {
6637 };
6638 struct rpc_message msg = {
6639 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6640 .rpc_argp = &args,
6641 .rpc_resp = &res,
6642 .rpc_cred = cred,
6643 };
6644 int status;
6645
6646 res.fh = nfs_alloc_fhandle();
6647 if (res.fh == NULL)
6648 return -ENOMEM;
6649
6650 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6651 nfs4_set_sequence_privileged(&args.seq_args);
6652 status = nfs4_call_sync_sequence(clnt, server, &msg,
6653 &args.seq_args, &res.seq_res);
6654 nfs_free_fhandle(res.fh);
6655 if (status == NFS4_OK &&
6656 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6657 status = -NFS4ERR_LEASE_MOVED;
6658 return status;
6659}
6660
6661#endif /* CONFIG_NFS_V4_1 */
6662
6663/**
6664 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6665 * @inode: inode on FSID to check
6666 * @cred: credential to use for this operation
6667 *
6668 * Server indicates whether the FSID is present, moved, or not
6669 * recognized. This operation is necessary to clear a LEASE_MOVED
6670 * condition for this client ID.
6671 *
6672 * Returns NFS4_OK if the FSID is present on this server,
6673 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6674 * NFS4ERR code if some error occurred on the server, or a
6675 * negative errno if a local failure occurred.
6676 */
6677int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6678{
6679 struct nfs_server *server = NFS_SERVER(inode);
6680 struct nfs_client *clp = server->nfs_client;
6681 const struct nfs4_mig_recovery_ops *ops =
6682 clp->cl_mvops->mig_recovery_ops;
6683 struct nfs4_exception exception = { };
6684 int status;
6685
6686 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6687 (unsigned long long)server->fsid.major,
6688 (unsigned long long)server->fsid.minor,
6689 clp->cl_hostname);
6690 nfs_display_fhandle(NFS_FH(inode), __func__);
6691
6692 do {
6693 status = ops->fsid_present(inode, cred);
6694 if (status != -NFS4ERR_DELAY)
6695 break;
6696 nfs4_handle_exception(server, status, &exception);
6697 } while (exception.retry);
6698 return status;
6699}
6700
5ec16a85 6701/**
a5250def
WAA		 6702 * If 'use_integrity' is true and the state managment nfs_client
6703 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6704 * and the machine credential as per RFC3530bis and RFC5661 Security
6705 * Considerations sections. Otherwise, just use the user cred with the
6706 * filesystem's rpc_client.
5ec16a85 6707 */
a5250def 6708static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6709{
6710 int status;
6711 struct nfs4_secinfo_arg args = {
6712 .dir_fh = NFS_FH(dir),
6713 .name = name,
6714 };
6715 struct nfs4_secinfo_res res = {
6716 .flavors = flavors,
6717 };
6718 struct rpc_message msg = {
6719 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6720 .rpc_argp = &args,
6721 .rpc_resp = &res,
6722 };
a5250def 6723 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6724 struct rpc_cred *cred = NULL;
a5250def
WAA		 6725
6726 if (use_integrity) {
6727 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6728 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6729 msg.rpc_cred = cred;
a5250def 6730 }
5a5ea0d4
BS		 6731
6732 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6733
6734 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6735 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6736
a5250def
WAA		 6737 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6738 &res.seq_res, 0);
5a5ea0d4 6739 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6740
7cb852df
WAA		 6741 if (cred)
6742 put_rpccred(cred);
a5250def 6743
5a5ea0d4
BS		 6744 return status;
6745}
6746
72de53ec
BS		 6747int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6748 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6749{
6750 struct nfs4_exception exception = { };
6751 int err;
6752 do {
a5250def
WAA		 6753 err = -NFS4ERR_WRONGSEC;
6754
6755 /* try to use integrity protection with machine cred */
6756 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6757 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6758
6759 /*
6760 * if unable to use integrity protection, or SECINFO with
6761 * integrity protection returns NFS4ERR_WRONGSEC (which is
6762 * disallowed by spec, but exists in deployed servers) use
6763 * the current filesystem's rpc_client and the user cred.
6764 */
6765 if (err == -NFS4ERR_WRONGSEC)
6766 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6767
078ea3df
TM		 6768 trace_nfs4_secinfo(dir, name, err);
6769 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6770 &exception);
6771 } while (exception.retry);
6772 return err;
6773}
6774
557134a3 6775#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6776/*
6777 * Check the exchange flags returned by the server for invalid flags, having
6778 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6779 * DS flags set.
6780 */
6781static int nfs4_check_cl_exchange_flags(u32 flags)
6782{
6783 if (flags & ~EXCHGID4_FLAG_MASK_R)
6784 goto out_inval;
6785 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6786 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6787 goto out_inval;
6788 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6789 goto out_inval;
6790 return NFS_OK;
6791out_inval:
6792 return -NFS4ERR_INVAL;
6793}
6794
78fe0f41 6795static bool
79d4e1f0
CL		 6796nfs41_same_server_scope(struct nfs41_server_scope *a,
6797 struct nfs41_server_scope *b)
78fe0f41
WAA		 6798{
6799 if (a->server_scope_sz == b->server_scope_sz &&
6800 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6801 return true;
6802
6803 return false;
6804}
6805
02a95dee
AA		 6806static void
6807nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
6808{
6809}
6810
6811static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
6812 .rpc_call_done = &nfs4_bind_one_conn_to_session_done,
6813};
6814
7c44f1ae 6815/*
d9ddbf5d 6816 * nfs4_proc_bind_one_conn_to_session()
7c44f1ae
WAA		 6817 *
6818 * The 4.1 client currently uses the same TCP connection for the
6819 * fore and backchannel.
6820 */
d9ddbf5d
TM		 6821static
6822int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
6823 struct rpc_xprt *xprt,
6824 struct nfs_client *clp,
6825 struct rpc_cred *cred)
7c44f1ae
WAA		 6826{
6827 int status;
71a097c6
TM		 6828 struct nfs41_bind_conn_to_session_args args = {
6829 .client = clp,
6830 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6831 };
7c44f1ae
WAA		 6832 struct nfs41_bind_conn_to_session_res res;
6833 struct rpc_message msg = {
6834 .rpc_proc =
6835 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 6836 .rpc_argp = &args,
7c44f1ae 6837 .rpc_resp = &res,
2cf047c9 6838 .rpc_cred = cred,
7c44f1ae 6839 };
d9ddbf5d
TM		 6840 struct rpc_task_setup task_setup_data = {
6841 .rpc_client = clnt,
6842 .rpc_xprt = xprt,
02a95dee 6843 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
d9ddbf5d
TM		 6844 .rpc_message = &msg,
6845 .flags = RPC_TASK_TIMEOUT,
6846 };
6847 struct rpc_task *task;
7c44f1ae
WAA		 6848
6849 dprintk("--> %s\n", __func__);
7c44f1ae 6850
71a097c6
TM		 6851 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6852 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6853 args.dir = NFS4_CDFC4_FORE;
7c44f1ae 6854
d9ddbf5d
TM		 6855 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
6856 if (xprt != rcu_access_pointer(clnt->cl_xprt))
6857 args.dir = NFS4_CDFC4_FORE;
6858
6859 task = rpc_run_task(&task_setup_data);
6860 if (!IS_ERR(task)) {
6861 status = task->tk_status;
6862 rpc_put_task(task);
6863 } else
6864 status = PTR_ERR(task);
c6d01c6f 6865 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 6866 if (status == 0) {
71a097c6 6867 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 6868 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6869 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6870 status = -EIO;
71a097c6 6871 goto out;
7c44f1ae 6872 }
71a097c6 6873 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 6874 dprintk("NFS: %s: Unexpected direction from server\n",
6875 __func__);
6876 status = -EIO;
71a097c6 6877 goto out;
7c44f1ae 6878 }
71a097c6 6879 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 6880 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6881 __func__);
6882 status = -EIO;
71a097c6 6883 goto out;
7c44f1ae
WAA		 6884 }
6885 }
7c44f1ae
WAA		 6886out:
6887 dprintk("<-- %s status= %d\n", __func__, status);
6888 return status;
6889}
6890
d9ddbf5d
TM		 6891struct rpc_bind_conn_calldata {
6892 struct nfs_client *clp;
6893 struct rpc_cred *cred;
6894};
6895
6896static int
6897nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
6898 struct rpc_xprt *xprt,
6899 void *calldata)
6900{
6901 struct rpc_bind_conn_calldata *p = calldata;
6902
6903 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
6904}
6905
6906int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
6907{
6908 struct rpc_bind_conn_calldata data = {
6909 .clp = clp,
6910 .cred = cred,
6911 };
6912 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
6913 nfs4_proc_bind_conn_to_session_callback, &data);
6914}
6915
99fe60d0 6916/*
fa940720
WAA		 6917 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6918 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6919 */
6920static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6921 .how = SP4_MACH_CRED,
6922 .enforce.u.words = {
6923 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6924 1 << (OP_EXCHANGE_ID - 32) |
6925 1 << (OP_CREATE_SESSION - 32) |
6926 1 << (OP_DESTROY_SESSION - 32) |
6927 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6928 },
6929 .allow.u.words = {
6930 [0] = 1 << (OP_CLOSE) |
99ade3c7 6931 1 << (OP_OPEN_DOWNGRADE) |
a0279625 6932 1 << (OP_LOCKU) |
99ade3c7 6933 1 << (OP_DELEGRETURN) |
a0279625 6934 1 << (OP_COMMIT),
8b5bee2e 6935 [1] = 1 << (OP_SECINFO - 32) |
3787d506 6936 1 << (OP_SECINFO_NO_NAME - 32) |
99ade3c7 6937 1 << (OP_LAYOUTRETURN - 32) |
3787d506 6938 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6939 1 << (OP_FREE_STATEID - 32) |
6940 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6941 }
6942};
6943
6944/*
6945 * Select the state protection mode for client `clp' given the server results
6946 * from exchange_id in `sp'.
99fe60d0 6947 *
2031cd1a
WAA		 6948 * Returns 0 on success, negative errno otherwise.
6949 */
6950static int nfs4_sp4_select_mode(struct nfs_client *clp,
6951 struct nfs41_state_protection *sp)
6952{
6953 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6954 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6955 1 << (OP_EXCHANGE_ID - 32) |
6956 1 << (OP_CREATE_SESSION - 32) |
6957 1 << (OP_DESTROY_SESSION - 32) |
6958 1 << (OP_DESTROY_CLIENTID - 32)
6959 };
6960 unsigned int i;
6961
6962 if (sp->how == SP4_MACH_CRED) {
6963 /* Print state protect result */
6964 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6965 for (i = 0; i <= LAST_NFS4_OP; i++) {
6966 if (test_bit(i, sp->enforce.u.longs))
6967 dfprintk(MOUNT, " enforce op %d\n", i);
6968 if (test_bit(i, sp->allow.u.longs))
6969 dfprintk(MOUNT, " allow op %d\n", i);
6970 }
6971
6972 /* make sure nothing is on enforce list that isn't supported */
6973 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6974 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6975 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6976 return -EINVAL;
6977 }
6978 }
6979
6980 /*
6981 * Minimal mode - state operations are allowed to use machine
6982 * credential. Note this already happens by default, so the
6983 * client doesn't have to do anything more than the negotiation.
6984 *
6985 * NOTE: we don't care if EXCHANGE_ID is in the list -
6986 * we're already using the machine cred for exchange_id
6987 * and will never use a different cred.
6988 */
6989 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6990 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6991 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6992 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6993 dfprintk(MOUNT, "sp4_mach_cred:\n");
6994 dfprintk(MOUNT, " minimal mode enabled\n");
6995 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6996 } else {
6997 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6998 return -EINVAL;
6999 }
fa940720
WAA		 7000
7001 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
99ade3c7
AE		 7002 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
7003 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
fa940720
WAA		 7004 test_bit(OP_LOCKU, sp->allow.u.longs)) {
7005 dfprintk(MOUNT, " cleanup mode enabled\n");
7006 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
7007 }
8b5bee2e 7008
99ade3c7
AE		 7009 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
7010 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
7011 set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP,
7012 &clp->cl_sp4_flags);
7013 }
7014
8b5bee2e
WAA		 7015 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
7016 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
7017 dfprintk(MOUNT, " secinfo mode enabled\n");
7018 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
7019 }
3787d506
WAA		 7020
7021 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
7022 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
7023 dfprintk(MOUNT, " stateid mode enabled\n");
7024 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
7025 }
8c21c62c
WAA		 7026
7027 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
7028 dfprintk(MOUNT, " write mode enabled\n");
7029 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
7030 }
7031
7032 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
7033 dfprintk(MOUNT, " commit mode enabled\n");
7034 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
7035 }
2031cd1a
WAA		 7036 }
7037
7038 return 0;
7039}
7040
7041/*
7042 * _nfs4_proc_exchange_id()
6bbb4ae8 7043 *
2031cd1a 7044 * Wrapper for EXCHANGE_ID operation.
99fe60d0 7045 */
2031cd1a
WAA		 7046static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
7047 u32 sp4_how)
99fe60d0
BH		 7048{
7049 nfs4_verifier verifier;
7050 struct nfs41_exchange_id_args args = {
cd93710e 7051 .verifier = &verifier,
99fe60d0 7052 .client = clp,
cd3fadec 7053#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 7054 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 7055 EXCHGID4_FLAG_BIND_PRINC_STATEID |
7056 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
7057#else
7058 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7059 EXCHGID4_FLAG_BIND_PRINC_STATEID,
7060#endif
99fe60d0
BH		 7061 };
7062 struct nfs41_exchange_id_res res = {
32b01310 7063 0
99fe60d0
BH		 7064 };
7065 int status;
7066 struct rpc_message msg = {
7067 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
7068 .rpc_argp = &args,
7069 .rpc_resp = &res,
7070 .rpc_cred = cred,
7071 };
99fe60d0 7072
f092075d 7073 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 7074
7075 status = nfs4_init_uniform_client_string(clp);
7076 if (status)
3a6bb738 7077 goto out;
3a6bb738
JL		 7078
7079 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6bbb4ae8 7080 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 7081 clp->cl_owner_id);
99fe60d0 7082
acdeb69d 7083 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 7084 GFP_NOFS);
acdeb69d 7085 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 7086 status = -ENOMEM;
7087 goto out;
7088 }
78fe0f41 7089
79d4e1f0 7090 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 7091 GFP_NOFS);
177313f1 7092 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 7093 status = -ENOMEM;
acdeb69d 7094 goto out_server_owner;
abe9a6d5 7095 }
78fe0f41 7096
bbafffd2 7097 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 7098 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 7099 status = -ENOMEM;
7100 goto out_server_scope;
7101 }
7102
2031cd1a
WAA		 7103 switch (sp4_how) {
7104 case SP4_NONE:
7105 args.state_protect.how = SP4_NONE;
7106 break;
7107
7108 case SP4_MACH_CRED:
7109 args.state_protect = nfs4_sp4_mach_cred_request;
7110 break;
7111
7112 default:
7113 /* unsupported! */
7114 WARN_ON_ONCE(1);
7115 status = -EINVAL;
6b55970b 7116 goto out_impl_id;
2031cd1a
WAA		 7117 }
7118
1bd714f2 7119 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7120 trace_nfs4_exchange_id(clp, status);
177313f1 7121 if (status == 0)
32b01310 7122 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 7123
2031cd1a
WAA		 7124 if (status == 0)
7125 status = nfs4_sp4_select_mode(clp, &res.state_protect);
7126
acdeb69d 7127 if (status == 0) {
32b01310 7128 clp->cl_clientid = res.clientid;
e11259f9
TM		 7129 clp->cl_exchange_flags = res.flags;
7130 /* Client ID is not confirmed */
7131 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7132 clear_bit(NFS4_SESSION_ESTABLISHED,
7133 &clp->cl_session->session_state);
32b01310 7134 clp->cl_seqid = res.seqid;
e11259f9 7135 }
32b01310 7136
acdeb69d
CL		 7137 kfree(clp->cl_serverowner);
7138 clp->cl_serverowner = res.server_owner;
7139 res.server_owner = NULL;
78fe0f41 7140
7d2ed9ac 7141 /* use the most recent implementation id */
59155546
CL		 7142 kfree(clp->cl_implid);
7143 clp->cl_implid = res.impl_id;
6b55970b 7144 res.impl_id = NULL;
7d2ed9ac 7145
177313f1 7146 if (clp->cl_serverscope != NULL &&
79d4e1f0 7147 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 7148 res.server_scope)) {
7149 dprintk("%s: server_scope mismatch detected\n",
7150 __func__);
7151 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 7152 kfree(clp->cl_serverscope);
7153 clp->cl_serverscope = NULL;
78fe0f41
WAA		 7154 }
7155
177313f1 7156 if (clp->cl_serverscope == NULL) {
79d4e1f0 7157 clp->cl_serverscope = res.server_scope;
6b55970b 7158 res.server_scope = NULL;
abe9a6d5 7159 }
6b55970b 7160 }
7d2ed9ac 7161
6b55970b
KM		 7162out_impl_id:
7163 kfree(res.impl_id);
7d2ed9ac 7164out_server_scope:
abe9a6d5 7165 kfree(res.server_scope);
6b55970b
KM		 7166out_server_owner:
7167 kfree(res.server_owner);
abe9a6d5 7168out:
177313f1 7169 if (clp->cl_implid != NULL)
6bbb4ae8 7170 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 7171 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 7172 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 7173 clp->cl_implid->date.seconds,
7174 clp->cl_implid->date.nseconds);
6bbb4ae8 7175 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 7176 return status;
7177}
7178
2031cd1a
WAA		 7179/*
7180 * nfs4_proc_exchange_id()
7181 *
7182 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7183 *
7184 * Since the clientid has expired, all compounds using sessions
7185 * associated with the stale clientid will be returning
7186 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7187 * be in some phase of session reset.
7188 *
7189 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7190 */
7191int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7192{
7193 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7194 int status;
7195
7196 /* try SP4_MACH_CRED if krb5i/p */
7197 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7198 authflavor == RPC_AUTH_GSS_KRB5P) {
7199 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
7200 if (!status)
7201 return 0;
7202 }
7203
7204 /* try SP4_NONE */
7205 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
7206}
7207
66245539
TM		 7208static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7209 struct rpc_cred *cred)
7210{
7211 struct rpc_message msg = {
7212 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7213 .rpc_argp = clp,
7214 .rpc_cred = cred,
7215 };
7216 int status;
7217
7218 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7219 trace_nfs4_destroy_clientid(clp, status);
66245539 7220 if (status)
02c67525 7221 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7222 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7223 return status;
7224}
7225
7226static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7227 struct rpc_cred *cred)
7228{
7229 unsigned int loop;
7230 int ret;
7231
7232 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7233 ret = _nfs4_proc_destroy_clientid(clp, cred);
7234 switch (ret) {
7235 case -NFS4ERR_DELAY:
7236 case -NFS4ERR_CLIENTID_BUSY:
7237 ssleep(1);
7238 break;
7239 default:
7240 return ret;
7241 }
7242 }
7243 return 0;
7244}
7245
7246int nfs4_destroy_clientid(struct nfs_client *clp)
7247{
7248 struct rpc_cred *cred;
7249 int ret = 0;
7250
7251 if (clp->cl_mvops->minor_version < 1)
7252 goto out;
7253 if (clp->cl_exchange_flags == 0)
7254 goto out;
05f4c350
CL		 7255 if (clp->cl_preserve_clid)
7256 goto out;
73d8bde5 7257 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7258 ret = nfs4_proc_destroy_clientid(clp, cred);
7259 if (cred)
7260 put_rpccred(cred);
7261 switch (ret) {
7262 case 0:
7263 case -NFS4ERR_STALE_CLIENTID:
7264 clp->cl_exchange_flags = 0;
7265 }
7266out:
7267 return ret;
7268}
7269
2050f0cc
AA		 7270struct nfs4_get_lease_time_data {
7271 struct nfs4_get_lease_time_args *args;
7272 struct nfs4_get_lease_time_res *res;
7273 struct nfs_client *clp;
7274};
7275
7276static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7277 void *calldata)
7278{
2050f0cc
AA		 7279 struct nfs4_get_lease_time_data *data =
7280 (struct nfs4_get_lease_time_data *)calldata;
7281
7282 dprintk("--> %s\n", __func__);
7283 /* just setup sequence, do not trigger session recovery
7284 since we're invoked within one */
d9afbd1b
TM		 7285 nfs41_setup_sequence(data->clp->cl_session,
7286 &data->args->la_seq_args,
7287 &data->res->lr_seq_res,
7288 task);
2050f0cc
AA		 7289 dprintk("<-- %s\n", __func__);
7290}
7291
7292/*
7293 * Called from nfs4_state_manager thread for session setup, so don't recover
7294 * from sequence operation or clientid errors.
7295 */
7296static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7297{
7298 struct nfs4_get_lease_time_data *data =
7299 (struct nfs4_get_lease_time_data *)calldata;
7300
7301 dprintk("--> %s\n", __func__);
14516c3a
TM		 7302 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7303 return;
2050f0cc
AA		 7304 switch (task->tk_status) {
7305 case -NFS4ERR_DELAY:
7306 case -NFS4ERR_GRACE:
7307 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7308 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7309 task->tk_status = 0;
a8a4ae3a
AA		 7310 /* fall through */
7311 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7312 rpc_restart_call_prepare(task);
2050f0cc
AA		 7313 return;
7314 }
2050f0cc
AA		 7315 dprintk("<-- %s\n", __func__);
7316}
7317
17280175 7318static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7319 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7320 .rpc_call_done = nfs4_get_lease_time_done,
7321};
7322
7323int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7324{
7325 struct rpc_task *task;
7326 struct nfs4_get_lease_time_args args;
7327 struct nfs4_get_lease_time_res res = {
7328 .lr_fsinfo = fsinfo,
7329 };
7330 struct nfs4_get_lease_time_data data = {
7331 .args = &args,
7332 .res = &res,
7333 .clp = clp,
7334 };
7335 struct rpc_message msg = {
7336 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7337 .rpc_argp = &args,
7338 .rpc_resp = &res,
7339 };
7340 struct rpc_task_setup task_setup = {
7341 .rpc_client = clp->cl_rpcclient,
7342 .rpc_message = &msg,
7343 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7344 .callback_data = &data,
7345 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7346 };
7347 int status;
7348
a9c92d6b 7349 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7350 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7351 dprintk("--> %s\n", __func__);
7352 task = rpc_run_task(&task_setup);
7353
7354 if (IS_ERR(task))
7355 status = PTR_ERR(task);
7356 else {
7357 status = task->tk_status;
7358 rpc_put_task(task);
7359 }
7360 dprintk("<-- %s return %d\n", __func__, status);
7361
7362 return status;
7363}
7364
fc931582
AA		 7365/*
7366 * Initialize the values to be used by the client in CREATE_SESSION
7367 * If nfs4_init_session set the fore channel request and response sizes,
7368 * use them.
7369 *
7370 * Set the back channel max_resp_sz_cached to zero to force the client to
7371 * always set csa_cachethis to FALSE because the current implementation
7372 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7373 */
6b26cc8c
CL		 7374static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
7375 struct rpc_clnt *clnt)
fc931582 7376{
18aad3d5 7377 unsigned int max_rqst_sz, max_resp_sz;
6b26cc8c 7378 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
18aad3d5
AA		 7379
7380 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7381 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7382
fc931582 7383 /* Fore channel attributes */
18aad3d5
AA		 7384 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7385 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7386 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7387 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7388
7389 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7390 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7391 __func__,
7392 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7393 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7394
7395 /* Back channel attributes */
6b26cc8c
CL		 7396 args->bc_attrs.max_rqst_sz = max_bc_payload;
7397 args->bc_attrs.max_resp_sz = max_bc_payload;
fc931582
AA		 7398 args->bc_attrs.max_resp_sz_cached = 0;
7399 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
f4f58ed1 7400 args->bc_attrs.max_reqs = NFS41_BC_MAX_CALLBACKS;
fc931582
AA		 7401
7402 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7403 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7404 __func__,
7405 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7406 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7407 args->bc_attrs.max_reqs);
7408}
7409
79969dd1
TM		 7410static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7411 struct nfs41_create_session_res *res)
8d35301d 7412{
43c2e885 7413 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7414 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7415
43c2e885
BF		 7416 if (rcvd->max_resp_sz > sent->max_resp_sz)
7417 return -EINVAL;
7418 /*
7419 * Our requested max_ops is the minimum we need; we're not
7420 * prepared to break up compounds into smaller pieces than that.
7421 * So, no point even trying to continue if the server won't
7422 * cooperate:
7423 */
7424 if (rcvd->max_ops < sent->max_ops)
7425 return -EINVAL;
7426 if (rcvd->max_reqs == 0)
7427 return -EINVAL;
b4b9a0c1
VG		 7428 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7429 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7430 return 0;
8d35301d
AA		 7431}
7432
79969dd1
TM		 7433static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7434 struct nfs41_create_session_res *res)
43c2e885
BF		 7435{
7436 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7437 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7438
b1c0df5f
TM		 7439 if (!(res->flags & SESSION4_BACK_CHAN))
7440 goto out;
43c2e885
BF		 7441 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7442 return -EINVAL;
7443 if (rcvd->max_resp_sz < sent->max_resp_sz)
7444 return -EINVAL;
7445 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7446 return -EINVAL;
7447 /* These would render the backchannel useless: */
b4b9a0c1 7448 if (rcvd->max_ops != sent->max_ops)
43c2e885 7449 return -EINVAL;
b4b9a0c1 7450 if (rcvd->max_reqs != sent->max_reqs)
43c2e885 7451 return -EINVAL;
b1c0df5f 7452out:
43c2e885
BF		 7453 return 0;
7454}
8d35301d 7455
8d35301d 7456static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7457 struct nfs41_create_session_res *res)
8d35301d 7458{
43c2e885 7459 int ret;
8d35301d 7460
79969dd1 7461 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7462 if (ret)
7463 return ret;
79969dd1
TM		 7464 return nfs4_verify_back_channel_attrs(args, res);
7465}
7466
7467static void nfs4_update_session(struct nfs4_session *session,
7468 struct nfs41_create_session_res *res)
7469{
7470 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7471 /* Mark client id and session as being confirmed */
7472 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7473 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7474 session->flags = res->flags;
7475 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7476 if (res->flags & SESSION4_BACK_CHAN)
7477 memcpy(&session->bc_attrs, &res->bc_attrs,
7478 sizeof(session->bc_attrs));
8d35301d
AA		 7479}
7480
848f5bda
TM		 7481static int _nfs4_proc_create_session(struct nfs_client *clp,
7482 struct rpc_cred *cred)
fc931582
AA		 7483{
7484 struct nfs4_session *session = clp->cl_session;
7485 struct nfs41_create_session_args args = {
7486 .client = clp,
79969dd1
TM		 7487 .clientid = clp->cl_clientid,
7488 .seqid = clp->cl_seqid,
fc931582
AA		 7489 .cb_program = NFS4_CALLBACK,
7490 };
79969dd1
TM		 7491 struct nfs41_create_session_res res;
7492
fc931582
AA		 7493 struct rpc_message msg = {
7494 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7495 .rpc_argp = &args,
7496 .rpc_resp = &res,
848f5bda 7497 .rpc_cred = cred,
fc931582
AA		 7498 };
7499 int status;
7500
6b26cc8c 7501 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
0f91421e 7502 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7503
1bd714f2 7504 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7505 trace_nfs4_create_session(clp, status);
fc931582 7506
43095d39 7507 if (!status) {
8d35301d 7508 /* Verify the session's negotiated channel_attrs values */
79969dd1 7509 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7510 /* Increment the clientid slot sequence id */
79969dd1
TM		 7511 if (clp->cl_seqid == res.seqid)
7512 clp->cl_seqid++;
7513 if (status)
7514 goto out;
7515 nfs4_update_session(session, &res);
fc931582 7516 }
79969dd1 7517out:
fc931582
AA		 7518 return status;
7519}
7520
7521/*
7522 * Issues a CREATE_SESSION operation to the server.
7523 * It is the responsibility of the caller to verify the session is
7524 * expired before calling this routine.
7525 */
848f5bda 7526int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7527{
7528 int status;
7529 unsigned *ptr;
fc931582
AA		 7530 struct nfs4_session *session = clp->cl_session;
7531
7532 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7533
848f5bda 7534 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7535 if (status)
7536 goto out;
7537
aacd5537
AA		 7538 /* Init or reset the session slot tables */
7539 status = nfs4_setup_session_slot_tables(session);
7540 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7541 if (status)
7542 goto out;
7543
7544 ptr = (unsigned *)&session->sess_id.data[0];
7545 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7546 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7547out:
7548 dprintk("<-- %s\n", __func__);
7549 return status;
7550}
7551
0f3e66c6
AA		 7552/*
7553 * Issue the over-the-wire RPC DESTROY_SESSION.
7554 * The caller must serialize access to this routine.
7555 */
848f5bda
TM		 7556int nfs4_proc_destroy_session(struct nfs4_session *session,
7557 struct rpc_cred *cred)
0f3e66c6 7558{
848f5bda
TM		 7559 struct rpc_message msg = {
7560 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7561 .rpc_argp = session,
7562 .rpc_cred = cred,
7563 };
0f3e66c6 7564 int status = 0;
0f3e66c6
AA		 7565
7566 dprintk("--> nfs4_proc_destroy_session\n");
7567
7568 /* session is still being setup */
e11259f9
TM		 7569 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7570 return 0;
0f3e66c6 7571
1bd714f2 7572 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7573 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7574
7575 if (status)
08106ac7 7576 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7577 "Session has been destroyed regardless...\n", status);
7578
7579 dprintk("<-- nfs4_proc_destroy_session\n");
7580 return status;
7581}
7582
fc01cea9
AA		 7583/*
7584 * Renew the cl_session lease.
7585 */
d5f8d3fe
TM		 7586struct nfs4_sequence_data {
7587 struct nfs_client *clp;
7588 struct nfs4_sequence_args args;
7589 struct nfs4_sequence_res res;
7590};
7591
dc96aef9
AB		 7592static void nfs41_sequence_release(void *data)
7593{
d5f8d3fe
TM		 7594 struct nfs4_sequence_data *calldata = data;
7595 struct nfs_client *clp = calldata->clp;
dc96aef9 7596
7135840f
AB		 7597 if (atomic_read(&clp->cl_count) > 1)
7598 nfs4_schedule_state_renewal(clp);
7599 nfs_put_client(clp);
d5f8d3fe 7600 kfree(calldata);
dc96aef9
AB		 7601}
7602
aa5190d0
TM		 7603static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7604{
7605 switch(task->tk_status) {
7606 case -NFS4ERR_DELAY:
aa5190d0
TM		 7607 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7608 return -EAGAIN;
7609 default:
0400a6b0 7610 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7611 }
7612 return 0;
7613}
7614
dc96aef9 7615static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7616{
d5f8d3fe
TM		 7617 struct nfs4_sequence_data *calldata = data;
7618 struct nfs_client *clp = calldata->clp;
fc01cea9 7619
14516c3a
TM		 7620 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7621 return;
fc01cea9 7622
c6d01c6f 7623 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7624 if (task->tk_status < 0) {
7625 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7626 if (atomic_read(&clp->cl_count) == 1)
7627 goto out;
fc01cea9 7628
aa5190d0
TM		 7629 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7630 rpc_restart_call_prepare(task);
fc01cea9
AA		 7631 return;
7632 }
7633 }
fc01cea9 7634 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7635out:
fc01cea9
AA		 7636 dprintk("<-- %s\n", __func__);
7637}
7638
7639static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7640{
d5f8d3fe
TM		 7641 struct nfs4_sequence_data *calldata = data;
7642 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7643 struct nfs4_sequence_args *args;
7644 struct nfs4_sequence_res *res;
7645
fc01cea9
AA		 7646 args = task->tk_msg.rpc_argp;
7647 res = task->tk_msg.rpc_resp;
7648
d9afbd1b 7649 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7650}
7651
7652static const struct rpc_call_ops nfs41_sequence_ops = {
7653 .rpc_call_done = nfs41_sequence_call_done,
7654 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7655 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7656};
7657
8fe72bac
TM		 7658static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7659 struct rpc_cred *cred,
7660 bool is_privileged)
fc01cea9 7661{
d5f8d3fe 7662 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7663 struct rpc_message msg = {
7664 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7665 .rpc_cred = cred,
7666 };
71ac6da9
TM		 7667 struct rpc_task_setup task_setup_data = {
7668 .rpc_client = clp->cl_rpcclient,
7669 .rpc_message = &msg,
8fe72bac 7670 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7671 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7672 };
fc01cea9 7673
7135840f 7674 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7675 return ERR_PTR(-EIO);
dfb4f309 7676 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7677 if (calldata == NULL) {
7135840f 7678 nfs_put_client(clp);
71ac6da9 7679 return ERR_PTR(-ENOMEM);
fc01cea9 7680 }
a9c92d6b 7681 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7682 if (is_privileged)
7683 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7684 msg.rpc_argp = &calldata->args;
7685 msg.rpc_resp = &calldata->res;
7686 calldata->clp = clp;
71ac6da9 7687 task_setup_data.callback_data = calldata;
fc01cea9 7688
71ac6da9
TM		 7689 return rpc_run_task(&task_setup_data);
7690}
7691
2f60ea6b 7692static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7693{
7694 struct rpc_task *task;
7695 int ret = 0;
7696
2f60ea6b 7697 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7698 return -EAGAIN;
8fe72bac 7699 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7700 if (IS_ERR(task))
7701 ret = PTR_ERR(task);
7702 else
bf294b41 7703 rpc_put_task_async(task);
71ac6da9
TM		 7704 dprintk("<-- %s status=%d\n", __func__, ret);
7705 return ret;
7706}
7707
7708static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7709{
7710 struct rpc_task *task;
7711 int ret;
7712
8fe72bac 7713 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7714 if (IS_ERR(task)) {
7715 ret = PTR_ERR(task);
7716 goto out;
7717 }
7718 ret = rpc_wait_for_completion_task(task);
be824167 7719 if (!ret)
71ac6da9
TM		 7720 ret = task->tk_status;
7721 rpc_put_task(task);
7722out:
7723 dprintk("<-- %s status=%d\n", __func__, ret);
7724 return ret;
fc01cea9
AA		 7725}
7726
fce5c838
RL		 7727struct nfs4_reclaim_complete_data {
7728 struct nfs_client *clp;
7729 struct nfs41_reclaim_complete_args arg;
7730 struct nfs41_reclaim_complete_res res;
7731};
7732
7733static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7734{
7735 struct nfs4_reclaim_complete_data *calldata = data;
7736
d9afbd1b
TM		 7737 nfs41_setup_sequence(calldata->clp->cl_session,
7738 &calldata->arg.seq_args,
7739 &calldata->res.seq_res,
7740 task);
fce5c838
RL		 7741}
7742
aa5190d0
TM		 7743static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7744{
7745 switch(task->tk_status) {
7746 case 0:
7747 case -NFS4ERR_COMPLETE_ALREADY:
7748 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7749 break;
7750 case -NFS4ERR_DELAY:
aa5190d0 7751 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7752 /* fall through */
7753 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7754 return -EAGAIN;
7755 default:
0400a6b0 7756 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7757 }
7758 return 0;
7759}
7760
fce5c838
RL		 7761static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7762{
7763 struct nfs4_reclaim_complete_data *calldata = data;
7764 struct nfs_client *clp = calldata->clp;
7765 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7766
7767 dprintk("--> %s\n", __func__);
14516c3a
TM		 7768 if (!nfs41_sequence_done(task, res))
7769 return;
fce5c838 7770
c6d01c6f 7771 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7772 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7773 rpc_restart_call_prepare(task);
7774 return;
7775 }
fce5c838
RL		 7776 dprintk("<-- %s\n", __func__);
7777}
7778
7779static void nfs4_free_reclaim_complete_data(void *data)
7780{
7781 struct nfs4_reclaim_complete_data *calldata = data;
7782
7783 kfree(calldata);
7784}
7785
7786static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7787 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7788 .rpc_call_done = nfs4_reclaim_complete_done,
7789 .rpc_release = nfs4_free_reclaim_complete_data,
7790};
7791
7792/*
7793 * Issue a global reclaim complete.
7794 */
965e9c23
TM		 7795static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7796 struct rpc_cred *cred)
fce5c838
RL		 7797{
7798 struct nfs4_reclaim_complete_data *calldata;
7799 struct rpc_task *task;
7800 struct rpc_message msg = {
7801 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7802 .rpc_cred = cred,
fce5c838
RL		 7803 };
7804 struct rpc_task_setup task_setup_data = {
7805 .rpc_client = clp->cl_rpcclient,
7806 .rpc_message = &msg,
7807 .callback_ops = &nfs4_reclaim_complete_call_ops,
7808 .flags = RPC_TASK_ASYNC,
7809 };
7810 int status = -ENOMEM;
7811
7812 dprintk("--> %s\n", __func__);
8535b2be 7813 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7814 if (calldata == NULL)
7815 goto out;
7816 calldata->clp = clp;
7817 calldata->arg.one_fs = 0;
fce5c838 7818
a9c92d6b 7819 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7820 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7821 msg.rpc_argp = &calldata->arg;
7822 msg.rpc_resp = &calldata->res;
7823 task_setup_data.callback_data = calldata;
7824 task = rpc_run_task(&task_setup_data);
acf82b85 7825 if (IS_ERR(task)) {
fce5c838 7826 status = PTR_ERR(task);
acf82b85
DC		 7827 goto out;
7828 }
c34c32ea
AA		 7829 status = nfs4_wait_for_completion_rpc_task(task);
7830 if (status == 0)
7831 status = task->tk_status;
fce5c838 7832 rpc_put_task(task);
acf82b85 7833 return 0;
fce5c838
RL		 7834out:
7835 dprintk("<-- %s status=%d\n", __func__, status);
7836 return status;
7837}
b1f69b75
AA		 7838
7839static void
7840nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7841{
7842 struct nfs4_layoutget *lgp = calldata;
c31663d4 7843 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7844 struct nfs4_session *session = nfs4_get_session(server);
ab7d763e 7845 int ret;
b1f69b75
AA		 7846
7847 dprintk("--> %s\n", __func__);
c31663d4
FI		 7848 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7849 * right now covering the LAYOUTGET we are about to send.
7850 * However, that is not so catastrophic, and there seems
7851 * to be no way to prevent it completely.
7852 */
6ba7db34 7853 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7854 &lgp->res.seq_res, task))
b1f69b75 7855 return;
ab7d763e 7856 ret = pnfs_choose_layoutget_stateid(&lgp->args.stateid,
cf7d63f1 7857 NFS_I(lgp->args.inode)->layout,
ce6ab4f2 7858 &lgp->args.range,
ab7d763e
TM		 7859 lgp->args.ctx->state);
7860 if (ret < 0)
7861 rpc_exit(task, ret);
b1f69b75
AA		 7862}
7863
7864static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7865{
7866 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7867 struct inode *inode = lgp->args.inode;
7868 struct nfs_server *server = NFS_SERVER(inode);
7869 struct pnfs_layout_hdr *lo;
7870 struct nfs4_state *state = NULL;
ed7e5423 7871 unsigned long timeo, now, giveup;
b1f69b75 7872
ed7e5423 7873 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7874
6ba7db34 7875 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7876 goto out;
b1f69b75
AA		 7877
7878 switch (task->tk_status) {
7879 case 0:
ee314c2a 7880 goto out;
7c1e6e58
PT		 7881
7882 /*
7883 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
7884 * on the file. set tk_status to -ENODATA to tell upper layer to
7885 * retry go inband.
7886 */
7887 case -NFS4ERR_LAYOUTUNAVAILABLE:
7888 task->tk_status = -ENODATA;
7889 goto out;
21b874c8
TM		 7890 /*
7891 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
7892 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
7893 */
7894 case -NFS4ERR_BADLAYOUT:
7895 goto out_overflow;
ed7e5423
BH		 7896 /*
7897 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
21b874c8
TM		 7898 * (or clients) writing to the same RAID stripe except when
7899 * the minlength argument is 0 (see RFC5661 section 18.43.3).
ed7e5423 7900 */
b1f69b75 7901 case -NFS4ERR_LAYOUTTRYLATER:
21b874c8
TM		 7902 if (lgp->args.minlength == 0)
7903 goto out_overflow;
ed7e5423
BH		 7904 /*
7905 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7906 * existing layout before getting a new one).
7907 */
b1f69b75 7908 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7909 timeo = rpc_get_timeout(task->tk_client);
7910 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7911 now = jiffies;
7912 if (time_after(giveup, now)) {
7913 unsigned long delay;
7914
7915 /* Delay for:
7916 * - Not less then NFS4_POLL_RETRY_MIN.
7917 * - One last time a jiffie before we give up
7918 * - exponential backoff (time_now minus start_attempt)
7919 */
7920 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7921 min((giveup - now - 1),
7922 now - lgp->args.timestamp));
7923
7924 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7925 __func__, delay);
7926 rpc_delay(task, delay);
2259f960
TM		 7927 /* Do not call nfs4_async_handle_error() */
7928 goto out_restart;
ed7e5423 7929 }
ee314c2a
TM		 7930 break;
7931 case -NFS4ERR_EXPIRED:
7932 case -NFS4ERR_BAD_STATEID:
7933 spin_lock(&inode->i_lock);
2259f960
TM		 7934 if (nfs4_stateid_match(&lgp->args.stateid,
7935 &lgp->args.ctx->state->stateid)) {
ee314c2a
TM		 7936 spin_unlock(&inode->i_lock);
7937 /* If the open stateid was bad, then recover it. */
7938 state = lgp->args.ctx->state;
2259f960
TM		 7939 break;
7940 }
7941 lo = NFS_I(inode)->layout;
7942 if (lo && nfs4_stateid_match(&lgp->args.stateid,
7943 &lo->plh_stateid)) {
ee314c2a
TM		 7944 LIST_HEAD(head);
7945
defb8460
CH		 7946 /*
7947 * Mark the bad layout state as invalid, then retry
7948 * with the current stateid.
7949 */
8714d46d 7950 set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);
ee314c2a
TM		 7951 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7952 spin_unlock(&inode->i_lock);
ee314c2a 7953 pnfs_free_lseg_list(&head);
2259f960
TM		 7954 } else
7955 spin_unlock(&inode->i_lock);
7956 goto out_restart;
b1f69b75 7957 }
91ab4b4d 7958 if (nfs4_async_handle_error(task, server, state, &lgp->timeout) == -EAGAIN)
2259f960 7959 goto out_restart;
ee314c2a 7960out:
b1f69b75 7961 dprintk("<-- %s\n", __func__);
21b874c8 7962 return;
2259f960
TM		 7963out_restart:
7964 task->tk_status = 0;
7965 rpc_restart_call_prepare(task);
7966 return;
21b874c8
TM		 7967out_overflow:
7968 task->tk_status = -EOVERFLOW;
7969 goto out;
b1f69b75
AA		 7970}
7971
8554116e
IK		 7972static size_t max_response_pages(struct nfs_server *server)
7973{
7974 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7975 return nfs_page_array_len(0, max_resp_sz);
7976}
7977
7978static void nfs4_free_pages(struct page **pages, size_t size)
7979{
7980 int i;
7981
7982 if (!pages)
7983 return;
7984
7985 for (i = 0; i < size; i++) {
7986 if (!pages[i])
7987 break;
7988 __free_page(pages[i]);
7989 }
7990 kfree(pages);
7991}
7992
7993static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7994{
7995 struct page **pages;
7996 int i;
7997
7998 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7999 if (!pages) {
8000 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
8001 return NULL;
8002 }
8003
8004 for (i = 0; i < size; i++) {
8005 pages[i] = alloc_page(gfp_flags);
8006 if (!pages[i]) {
8007 dprintk("%s: failed to allocate page\n", __func__);
8008 nfs4_free_pages(pages, size);
8009 return NULL;
8010 }
8011 }
8012
8013 return pages;
8014}
8015
b1f69b75
AA		 8016static void nfs4_layoutget_release(void *calldata)
8017{
8018 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 8019 struct inode *inode = lgp->args.inode;
8020 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8021 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8022
8023 dprintk("--> %s\n", __func__);
8554116e 8024 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 8025 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 8026 put_nfs_open_context(lgp->args.ctx);
8027 kfree(calldata);
8028 dprintk("<-- %s\n", __func__);
8029}
8030
8031static const struct rpc_call_ops nfs4_layoutget_call_ops = {
8032 .rpc_call_prepare = nfs4_layoutget_prepare,
8033 .rpc_call_done = nfs4_layoutget_done,
8034 .rpc_release = nfs4_layoutget_release,
8035};
8036
a0b0a6e3
TM		 8037struct pnfs_layout_segment *
8038nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 8039{
a47970ff
WAA		 8040 struct inode *inode = lgp->args.inode;
8041 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8042 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8043 struct rpc_task *task;
8044 struct rpc_message msg = {
8045 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
8046 .rpc_argp = &lgp->args,
8047 .rpc_resp = &lgp->res,
6ab59344 8048 .rpc_cred = lgp->cred,
b1f69b75
AA		 8049 };
8050 struct rpc_task_setup task_setup_data = {
8051 .rpc_client = server->client,
8052 .rpc_message = &msg,
8053 .callback_ops = &nfs4_layoutget_call_ops,
8054 .callback_data = lgp,
8055 .flags = RPC_TASK_ASYNC,
8056 };
a0b0a6e3 8057 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 8058 int status = 0;
8059
8060 dprintk("--> %s\n", __func__);
8061
4bd5a980
PT		 8062 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
8063 pnfs_get_layout_hdr(NFS_I(inode)->layout);
8064
8554116e
IK		 8065 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
8066 if (!lgp->args.layout.pages) {
8067 nfs4_layoutget_release(lgp);
a0b0a6e3 8068 return ERR_PTR(-ENOMEM);
8554116e
IK		 8069 }
8070 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 8071 lgp->args.timestamp = jiffies;
8554116e 8072
35124a09 8073 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 8074 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 8075 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 8076
b1f69b75
AA		 8077 task = rpc_run_task(&task_setup_data);
8078 if (IS_ERR(task))
a0b0a6e3 8079 return ERR_CAST(task);
b1f69b75 8080 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 8081 if (status == 0)
8082 status = task->tk_status;
1037e6ea
TM		 8083 trace_nfs4_layoutget(lgp->args.ctx,
8084 &lgp->args.range,
8085 &lgp->res.range,
48c9579a 8086 &lgp->res.stateid,
1037e6ea 8087 status);
085b7a45
WAA		 8088 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8089 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 8090 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 8091 rpc_put_task(task);
8092 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 8093 if (status)
8094 return ERR_PTR(status);
8095 return lseg;
b1f69b75
AA		 8096}
8097
cbe82603
BH		 8098static void
8099nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8100{
8101 struct nfs4_layoutreturn *lrp = calldata;
8102
8103 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 8104 nfs41_setup_sequence(lrp->clp->cl_session,
8105 &lrp->args.seq_args,
8106 &lrp->res.seq_res,
8107 task);
cbe82603
BH		 8108}
8109
8110static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8111{
8112 struct nfs4_layoutreturn *lrp = calldata;
8113 struct nfs_server *server;
8114
8115 dprintk("--> %s\n", __func__);
8116
6ba7db34 8117 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 8118 return;
8119
8120 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 8121 switch (task->tk_status) {
8122 default:
8123 task->tk_status = 0;
8124 case 0:
8125 break;
8126 case -NFS4ERR_DELAY:
8478eaa1 8127 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 8128 break;
d00c5d43 8129 rpc_restart_call_prepare(task);
cbe82603
BH		 8130 return;
8131 }
cbe82603
BH		 8132 dprintk("<-- %s\n", __func__);
8133}
8134
8135static void nfs4_layoutreturn_release(void *calldata)
8136{
8137 struct nfs4_layoutreturn *lrp = calldata;
849b286f 8138 struct pnfs_layout_hdr *lo = lrp->args.layout;
c5d73716 8139 LIST_HEAD(freeme);
cbe82603
BH		 8140
8141 dprintk("--> %s\n", __func__);
849b286f 8142 spin_lock(&lo->plh_inode->i_lock);
0654cc72
TM		 8143 pnfs_mark_matching_lsegs_invalid(lo, &freeme, &lrp->args.range);
8144 pnfs_mark_layout_returned_if_empty(lo);
849b286f
TM		 8145 if (lrp->res.lrs_present)
8146 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
d67ae825 8147 pnfs_clear_layoutreturn_waitbit(lo);
849b286f 8148 spin_unlock(&lo->plh_inode->i_lock);
c5d73716 8149 pnfs_free_lseg_list(&freeme);
70c3bd2b 8150 pnfs_put_layout_hdr(lrp->args.layout);
5a0ec8ac 8151 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 8152 kfree(calldata);
8153 dprintk("<-- %s\n", __func__);
8154}
8155
8156static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8157 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8158 .rpc_call_done = nfs4_layoutreturn_done,
8159 .rpc_release = nfs4_layoutreturn_release,
8160};
8161
6c16605d 8162int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 8163{
8164 struct rpc_task *task;
8165 struct rpc_message msg = {
8166 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8167 .rpc_argp = &lrp->args,
8168 .rpc_resp = &lrp->res,
9556000d 8169 .rpc_cred = lrp->cred,
cbe82603
BH		 8170 };
8171 struct rpc_task_setup task_setup_data = {
1771c577 8172 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8173 .rpc_message = &msg,
8174 .callback_ops = &nfs4_layoutreturn_call_ops,
8175 .callback_data = lrp,
8176 };
6c16605d 8177 int status = 0;
cbe82603 8178
99ade3c7
AE		 8179 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
8180 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
8181 &task_setup_data.rpc_client, &msg);
8182
cbe82603 8183 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8184 if (!sync) {
8185 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8186 if (!lrp->inode) {
8187 nfs4_layoutreturn_release(lrp);
8188 return -EAGAIN;
8189 }
8190 task_setup_data.flags |= RPC_TASK_ASYNC;
8191 }
a9c92d6b 8192 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8193 task = rpc_run_task(&task_setup_data);
8194 if (IS_ERR(task))
8195 return PTR_ERR(task);
5a0ec8ac
TM		 8196 if (sync)
8197 status = task->tk_status;
48c9579a 8198 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
cbe82603
BH		 8199 dprintk("<-- %s status=%d\n", __func__, status);
8200 rpc_put_task(task);
8201 return status;
8202}
8203
b1f69b75 8204static int
cd5875fe
TM		 8205_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8206 struct pnfs_device *pdev,
8207 struct rpc_cred *cred)
b1f69b75
AA		 8208{
8209 struct nfs4_getdeviceinfo_args args = {
8210 .pdev = pdev,
4e590803
TM		 8211 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8212 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8213 };
8214 struct nfs4_getdeviceinfo_res res = {
8215 .pdev = pdev,
8216 };
8217 struct rpc_message msg = {
8218 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8219 .rpc_argp = &args,
8220 .rpc_resp = &res,
cd5875fe 8221 .rpc_cred = cred,
b1f69b75
AA		 8222 };
8223 int status;
8224
8225 dprintk("--> %s\n", __func__);
7c513058 8226 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8227 if (res.notification & ~args.notify_types)
8228 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8229 if (res.notification != args.notify_types)
8230 pdev->nocache = 1;
4e590803 8231
b1f69b75
AA		 8232 dprintk("<-- %s status=%d\n", __func__, status);
8233
8234 return status;
8235}
8236
cd5875fe
TM		 8237int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8238 struct pnfs_device *pdev,
8239 struct rpc_cred *cred)
b1f69b75
AA		 8240{
8241 struct nfs4_exception exception = { };
8242 int err;
8243
8244 do {
8245 err = nfs4_handle_exception(server,
cd5875fe 8246 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8247 &exception);
8248 } while (exception.retry);
8249 return err;
8250}
8251EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8252
863a3c6c
AA		 8253static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8254{
8255 struct nfs4_layoutcommit_data *data = calldata;
8256 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 8257 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 8258
d9afbd1b
TM		 8259 nfs41_setup_sequence(session,
8260 &data->args.seq_args,
8261 &data->res.seq_res,
8262 task);
863a3c6c
AA		 8263}
8264
8265static void
8266nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8267{
8268 struct nfs4_layoutcommit_data *data = calldata;
8269 struct nfs_server *server = NFS_SERVER(data->args.inode);
8270
6ba7db34 8271 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8272 return;
8273
8274 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8275 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8276 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8277 case -NFS4ERR_BADLAYOUT: /* no layout */
8278 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8279 task->tk_status = 0;
e59d27e0 8280 case 0:
e59d27e0
TM		 8281 break;
8282 default:
8478eaa1 8283 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8284 rpc_restart_call_prepare(task);
8285 return;
8286 }
8287 }
863a3c6c
AA		 8288}
8289
8290static void nfs4_layoutcommit_release(void *calldata)
8291{
8292 struct nfs4_layoutcommit_data *data = calldata;
8293
db29c089 8294 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8295 nfs_post_op_update_inode_force_wcc(data->args.inode,
8296 data->res.fattr);
863a3c6c 8297 put_rpccred(data->cred);
472e2594 8298 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8299 kfree(data);
8300}
8301
8302static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8303 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8304 .rpc_call_done = nfs4_layoutcommit_done,
8305 .rpc_release = nfs4_layoutcommit_release,
8306};
8307
8308int
ef311537 8309nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8310{
8311 struct rpc_message msg = {
8312 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8313 .rpc_argp = &data->args,
8314 .rpc_resp = &data->res,
8315 .rpc_cred = data->cred,
8316 };
8317 struct rpc_task_setup task_setup_data = {
8318 .task = &data->task,
8319 .rpc_client = NFS_CLIENT(data->args.inode),
8320 .rpc_message = &msg,
8321 .callback_ops = &nfs4_layoutcommit_ops,
8322 .callback_data = data,
863a3c6c
AA		 8323 };
8324 struct rpc_task *task;
8325 int status = 0;
8326
b4839ebe
KM		 8327 dprintk("NFS: initiating layoutcommit call. sync %d "
8328 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8329 data->args.lastbytewritten,
8330 data->args.inode->i_ino);
8331
472e2594
TM		 8332 if (!sync) {
8333 data->inode = nfs_igrab_and_active(data->args.inode);
8334 if (data->inode == NULL) {
8335 nfs4_layoutcommit_release(data);
8336 return -EAGAIN;
8337 }
8338 task_setup_data.flags = RPC_TASK_ASYNC;
8339 }
a9c92d6b 8340 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8341 task = rpc_run_task(&task_setup_data);
8342 if (IS_ERR(task))
8343 return PTR_ERR(task);
472e2594
TM		 8344 if (sync)
8345 status = task->tk_status;
48c9579a 8346 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
863a3c6c
AA		 8347 dprintk("%s: status %d\n", __func__, status);
8348 rpc_put_task(task);
8349 return status;
8350}
fca78d6d 8351
97431204
AA		 8352/**
8353 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8354 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8355 */
fca78d6d
BS		 8356static int
8357_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8358 struct nfs_fsinfo *info,
8359 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8360{
8361 struct nfs41_secinfo_no_name_args args = {
8362 .style = SECINFO_STYLE_CURRENT_FH,
8363 };
8364 struct nfs4_secinfo_res res = {
8365 .flavors = flavors,
8366 };
8367 struct rpc_message msg = {
8368 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8369 .rpc_argp = &args,
8370 .rpc_resp = &res,
8371 };
b1b3e136 8372 struct rpc_clnt *clnt = server->client;
7cb852df 8373 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8374 int status;
8375
8376 if (use_integrity) {
8377 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8378 cred = nfs4_get_clid_cred(server->nfs_client);
8379 msg.rpc_cred = cred;
b1b3e136
WAA		 8380 }
8381
8382 dprintk("--> %s\n", __func__);
8383 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8384 &res.seq_res, 0);
8385 dprintk("<-- %s status=%d\n", __func__, status);
8386
7cb852df
WAA		 8387 if (cred)
8388 put_rpccred(cred);
b1b3e136
WAA		 8389
8390 return status;
fca78d6d
BS		 8391}
8392
8393static int
8394nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8395 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8396{
8397 struct nfs4_exception exception = { };
8398 int err;
8399 do {
b1b3e136
WAA		 8400 /* first try using integrity protection */
8401 err = -NFS4ERR_WRONGSEC;
8402
8403 /* try to use integrity protection with machine cred */
8404 if (_nfs4_is_integrity_protected(server->nfs_client))
8405 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8406 flavors, true);
8407
8408 /*
8409 * if unable to use integrity protection, or SECINFO with
8410 * integrity protection returns NFS4ERR_WRONGSEC (which is
8411 * disallowed by spec, but exists in deployed servers) use
8412 * the current filesystem's rpc_client and the user cred.
8413 */
8414 if (err == -NFS4ERR_WRONGSEC)
8415 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8416 flavors, false);
8417
fca78d6d
BS		 8418 switch (err) {
8419 case 0:
8420 case -NFS4ERR_WRONGSEC:
78b19bae 8421 case -ENOTSUPP:
05e9cfb4 8422 goto out;
fca78d6d
BS		 8423 default:
8424 err = nfs4_handle_exception(server, err, &exception);
8425 }
8426 } while (exception.retry);
05e9cfb4 8427out:
fca78d6d
BS		 8428 return err;
8429}
8430
8431static int
8432nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8433 struct nfs_fsinfo *info)
8434{
8435 int err;
8436 struct page *page;
367156d9 8437 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8438 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8439 struct nfs4_secinfo4 *secinfo;
8440 int i;
fca78d6d
BS		 8441
8442 page = alloc_page(GFP_KERNEL);
8443 if (!page) {
8444 err = -ENOMEM;
8445 goto out;
8446 }
8447
8448 flavors = page_address(page);
8449 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8450
8451 /*
8452 * Fall back on "guess and check" method if
8453 * the server doesn't support SECINFO_NO_NAME
8454 */
78b19bae 8455 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8456 err = nfs4_find_root_sec(server, fhandle, info);
8457 goto out_freepage;
8458 }
8459 if (err)
8460 goto out_freepage;
8461
58a8cf12
WAA		 8462 for (i = 0; i < flavors->num_flavors; i++) {
8463 secinfo = &flavors->flavors[i];
8464
8465 switch (secinfo->flavor) {
8466 case RPC_AUTH_NULL:
8467 case RPC_AUTH_UNIX:
8468 case RPC_AUTH_GSS:
8469 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8470 &secinfo->flavor_info);
8471 break;
8472 default:
8473 flavor = RPC_AUTH_MAXFLAVOR;
8474 break;
8475 }
8476
4d4b69dd
WAA		 8477 if (!nfs_auth_info_match(&server->auth_info, flavor))
8478 flavor = RPC_AUTH_MAXFLAVOR;
8479
58a8cf12
WAA		 8480 if (flavor != RPC_AUTH_MAXFLAVOR) {
8481 err = nfs4_lookup_root_sec(server, fhandle,
8482 info, flavor);
8483 if (!err)
8484 break;
8485 }
8486 }
8487
8488 if (flavor == RPC_AUTH_MAXFLAVOR)
8489 err = -EPERM;
fca78d6d
BS		 8490
8491out_freepage:
8492 put_page(page);
8493 if (err == -EACCES)
8494 return -EPERM;
8495out:
8496 return err;
8497}
1cab0652 8498
ab7cb0df
TM		 8499static int _nfs41_test_stateid(struct nfs_server *server,
8500 nfs4_stateid *stateid,
8501 struct rpc_cred *cred)
7d974794
BS		 8502{
8503 int status;
8504 struct nfs41_test_stateid_args args = {
1cab0652 8505 .stateid = stateid,
7d974794
BS		 8506 };
8507 struct nfs41_test_stateid_res res;
8508 struct rpc_message msg = {
8509 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8510 .rpc_argp = &args,
8511 .rpc_resp = &res,
ab7cb0df 8512 .rpc_cred = cred,
7d974794 8513 };
3787d506
WAA		 8514 struct rpc_clnt *rpc_client = server->client;
8515
8516 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8517 &rpc_client, &msg);
1cab0652 8518
38527b15 8519 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8520 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8521 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8522 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8523 &args.seq_args, &res.seq_res);
38527b15
CL		 8524 if (status != NFS_OK) {
8525 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8526 return status;
38527b15
CL		 8527 }
8528 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8529 return -res.status;
7d974794
BS		 8530}
8531
38527b15
CL		 8532/**
8533 * nfs41_test_stateid - perform a TEST_STATEID operation
8534 *
8535 * @server: server / transport on which to perform the operation
8536 * @stateid: state ID to test
ab7cb0df 8537 * @cred: credential
38527b15
CL		 8538 *
8539 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8540 * Otherwise a negative NFS4ERR value is returned if the operation
8541 * failed or the state ID is not currently valid.
8542 */
ab7cb0df
TM		 8543static int nfs41_test_stateid(struct nfs_server *server,
8544 nfs4_stateid *stateid,
8545 struct rpc_cred *cred)
7d974794
BS		 8546{
8547 struct nfs4_exception exception = { };
8548 int err;
8549 do {
ab7cb0df 8550 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8551 if (err != -NFS4ERR_DELAY)
8552 break;
8553 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8554 } while (exception.retry);
8555 return err;
8556}
9aeda35f 8557
7c1d5fae
TM		 8558struct nfs_free_stateid_data {
8559 struct nfs_server *server;
8560 struct nfs41_free_stateid_args args;
9aeda35f 8561 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8562};
8563
8564static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8565{
8566 struct nfs_free_stateid_data *data = calldata;
8567 nfs41_setup_sequence(nfs4_get_session(data->server),
8568 &data->args.seq_args,
8569 &data->res.seq_res,
8570 task);
8571}
8572
8573static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8574{
8575 struct nfs_free_stateid_data *data = calldata;
8576
8577 nfs41_sequence_done(task, &data->res.seq_res);
8578
8579 switch (task->tk_status) {
8580 case -NFS4ERR_DELAY:
8478eaa1 8581 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8582 rpc_restart_call_prepare(task);
8583 }
8584}
8585
8586static void nfs41_free_stateid_release(void *calldata)
8587{
8588 kfree(calldata);
8589}
8590
17f26b12 8591static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8592 .rpc_call_prepare = nfs41_free_stateid_prepare,
8593 .rpc_call_done = nfs41_free_stateid_done,
8594 .rpc_release = nfs41_free_stateid_release,
8595};
8596
8597static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8598 nfs4_stateid *stateid,
ab7cb0df 8599 struct rpc_cred *cred,
7c1d5fae
TM		 8600 bool privileged)
8601{
9aeda35f
BS		 8602 struct rpc_message msg = {
8603 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8604 .rpc_cred = cred,
9aeda35f 8605 };
7c1d5fae
TM		 8606 struct rpc_task_setup task_setup = {
8607 .rpc_client = server->client,
8608 .rpc_message = &msg,
8609 .callback_ops = &nfs41_free_stateid_ops,
8610 .flags = RPC_TASK_ASYNC,
8611 };
8612 struct nfs_free_stateid_data *data;
9aeda35f 8613
3787d506
WAA		 8614 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8615 &task_setup.rpc_client, &msg);
8616
38527b15 8617 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8618 data = kmalloc(sizeof(*data), GFP_NOFS);
8619 if (!data)
8620 return ERR_PTR(-ENOMEM);
8621 data->server = server;
8622 nfs4_stateid_copy(&data->args.stateid, stateid);
8623
8624 task_setup.callback_data = data;
8625
8626 msg.rpc_argp = &data->args;
8627 msg.rpc_resp = &data->res;
a9c92d6b 8628 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8629 if (privileged)
8630 nfs4_set_sequence_privileged(&data->args.seq_args);
8631
8632 return rpc_run_task(&task_setup);
9aeda35f
BS		 8633}
8634
38527b15
CL		 8635/**
8636 * nfs41_free_stateid - perform a FREE_STATEID operation
8637 *
8638 * @server: server / transport on which to perform the operation
8639 * @stateid: state ID to release
ab7cb0df 8640 * @cred: credential
38527b15
CL		 8641 *
8642 * Returns NFS_OK if the server freed "stateid". Otherwise a
8643 * negative NFS4ERR value is returned.
8644 */
ab7cb0df
TM		 8645static int nfs41_free_stateid(struct nfs_server *server,
8646 nfs4_stateid *stateid,
8647 struct rpc_cred *cred)
9aeda35f 8648{
7c1d5fae
TM		 8649 struct rpc_task *task;
8650 int ret;
8651
ab7cb0df 8652 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8653 if (IS_ERR(task))
8654 return PTR_ERR(task);
8655 ret = rpc_wait_for_completion_task(task);
8656 if (!ret)
8657 ret = task->tk_status;
8658 rpc_put_task(task);
8659 return ret;
9aeda35f 8660}
36281caa 8661
f1cdae87
JL		 8662static void
8663nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8664{
8665 struct rpc_task *task;
ab7cb0df 8666 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8667
ab7cb0df 8668 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8669 nfs4_free_lock_state(server, lsp);
8670 if (IS_ERR(task))
f1cdae87 8671 return;
c8b2d0bf 8672 rpc_put_task(task);
c8b2d0bf
TM		 8673}
8674
36281caa
TM		 8675static bool nfs41_match_stateid(const nfs4_stateid *s1,
8676 const nfs4_stateid *s2)
8677{
93b717fd
TM		 8678 if (s1->type != s2->type)
8679 return false;
8680
2d2f24ad 8681 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8682 return false;
8683
2d2f24ad 8684 if (s1->seqid == s2->seqid)
36281caa 8685 return true;
2d2f24ad 8686 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8687 return true;
8688
8689 return false;
8690}
8691
557134a3
AA		 8692#endif /* CONFIG_NFS_V4_1 */
8693
36281caa
TM		 8694static bool nfs4_match_stateid(const nfs4_stateid *s1,
8695 const nfs4_stateid *s2)
8696{
f597c537 8697 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8698}
8699
8700
17280175 8701static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8702 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8703 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8704 .recover_open = nfs4_open_reclaim,
8705 .recover_lock = nfs4_lock_reclaim,
591d71cb 8706 .establish_clid = nfs4_init_clientid,
05f4c350 8707 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8708};
8709
591d71cb 8710#if defined(CONFIG_NFS_V4_1)
17280175 8711static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8712 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8713 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8714 .recover_open = nfs4_open_reclaim,
8715 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8716 .establish_clid = nfs41_init_clientid,
fce5c838 8717 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8718 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8719};
8720#endif /* CONFIG_NFS_V4_1 */
8721
17280175 8722static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8723 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8724 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8725 .recover_open = nfs40_open_expired,
591d71cb
AA		 8726 .recover_lock = nfs4_lock_expired,
8727 .establish_clid = nfs4_init_clientid,
8728};
8729
8730#if defined(CONFIG_NFS_V4_1)
17280175 8731static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8732 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8733 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8734 .recover_open = nfs41_open_expired,
8735 .recover_lock = nfs41_lock_expired,
4d643d1d 8736 .establish_clid = nfs41_init_clientid,
1da177e4 8737};
591d71cb 8738#endif /* CONFIG_NFS_V4_1 */
1da177e4 8739
17280175 8740static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8741 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8742 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8743 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8744};
8745
8746#if defined(CONFIG_NFS_V4_1)
17280175 8747static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8748 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8749 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8750 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8751};
8752#endif
8753
ec011fe8 8754static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8755 .get_locations = _nfs40_proc_get_locations,
44c99933 8756 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8757};
8758
8759#if defined(CONFIG_NFS_V4_1)
8760static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8761 .get_locations = _nfs41_proc_get_locations,
44c99933 8762 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8763};
8764#endif /* CONFIG_NFS_V4_1 */
8765
97dc1359
TM		 8766static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8767 .minor_version = 0,
39c6daae
TM		 8768 .init_caps = NFS_CAP_READDIRPLUS
8769 | NFS_CAP_ATOMIC_OPEN
39c6daae 8770 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8771 .init_client = nfs40_init_client,
8772 .shutdown_client = nfs40_shutdown_client,
36281caa 8773 .match_stateid = nfs4_match_stateid,
fca78d6d 8774 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8775 .free_lock_state = nfs4_release_lockowner,
63f5f796 8776 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 8777 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8778 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8779 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8780 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8781 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8782};
8783
8784#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 8785static struct nfs_seqid *
8786nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8787{
8788 return NULL;
8789}
8790
97dc1359
TM		 8791static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8792 .minor_version = 1,
39c6daae
TM		 8793 .init_caps = NFS_CAP_READDIRPLUS
8794 | NFS_CAP_ATOMIC_OPEN
3b66486c 8795 | NFS_CAP_POSIX_LOCK
49f9a0fa 8796 | NFS_CAP_STATEID_NFSV41
e983120e 8797 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8798 .init_client = nfs41_init_client,
8799 .shutdown_client = nfs41_shutdown_client,
36281caa 8800 .match_stateid = nfs41_match_stateid,
fca78d6d 8801 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8802 .free_lock_state = nfs41_free_lock_state,
63f5f796 8803 .alloc_seqid = nfs_alloc_no_seqid,
9915ea7e 8804 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8805 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8806 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8807 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8808 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8809};
8810#endif
8811
42c2c424
SD		 8812#if defined(CONFIG_NFS_V4_2)
8813static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8814 .minor_version = 2,
7017310a
BS		 8815 .init_caps = NFS_CAP_READDIRPLUS
8816 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 8817 | NFS_CAP_POSIX_LOCK
8818 | NFS_CAP_STATEID_NFSV41
e983120e 8819 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 8820 | NFS_CAP_ALLOCATE
2e72448b 8821 | NFS_CAP_COPY
624bd5b7 8822 | NFS_CAP_DEALLOCATE
6c5a0d89 8823 | NFS_CAP_SEEK
e5341f3a
PT		 8824 | NFS_CAP_LAYOUTSTATS
8825 | NFS_CAP_CLONE,
abf79bb3
CL		 8826 .init_client = nfs41_init_client,
8827 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8828 .match_stateid = nfs41_match_stateid,
8829 .find_root_sec = nfs41_find_root_sec,
7017310a 8830 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8831 .call_sync_ops = &nfs41_call_sync_ops,
63f5f796 8832 .alloc_seqid = nfs_alloc_no_seqid,
42c2c424
SD		 8833 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8834 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8835 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 8836 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 8837};
8838#endif
8839
97dc1359
TM		 8840const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8841 [0] = &nfs_v4_0_minor_ops,
8842#if defined(CONFIG_NFS_V4_1)
8843 [1] = &nfs_v4_1_minor_ops,
8844#endif
42c2c424
SD		 8845#if defined(CONFIG_NFS_V4_2)
8846 [2] = &nfs_v4_2_minor_ops,
8847#endif
97dc1359
TM		 8848};
8849
c4803c49
AG		 8850ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
8851{
8852 ssize_t error, error2;
8853
8854 error = generic_listxattr(dentry, list, size);
8855 if (error < 0)
8856 return error;
8857 if (list) {
8858 list += error;
8859 size -= error;
8860 }
8861
8862 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
8863 if (error2 < 0)
8864 return error2;
8865 return error + error2;
8866}
8867
17f26b12 8868static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8869 .create = nfs_create,
8870 .lookup = nfs_lookup,
8871 .atomic_open = nfs_atomic_open,
8872 .link = nfs_link,
8873 .unlink = nfs_unlink,
8874 .symlink = nfs_symlink,
8875 .mkdir = nfs_mkdir,
8876 .rmdir = nfs_rmdir,
8877 .mknod = nfs_mknod,
8878 .rename = nfs_rename,
8879 .permission = nfs_permission,
8880 .getattr = nfs_getattr,
8881 .setattr = nfs_setattr,
8882 .getxattr = generic_getxattr,
8883 .setxattr = generic_setxattr,
c4803c49 8884 .listxattr = nfs4_listxattr,
73a79706
BS		 8885 .removexattr = generic_removexattr,
8886};
8887
92e1d5be 8888static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8889 .permission = nfs_permission,
8890 .getattr = nfs_getattr,
8891 .setattr = nfs_setattr,
64c2ce8b
AK		 8892 .getxattr = generic_getxattr,
8893 .setxattr = generic_setxattr,
c4803c49 8894 .listxattr = nfs4_listxattr,
64c2ce8b 8895 .removexattr = generic_removexattr,
6b3b5496
BF		 8896};
8897
509de811 8898const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8899 .version = 4, /* protocol version */
8900 .dentry_ops = &nfs4_dentry_operations,
8901 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8902 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8903 .file_ops = &nfs4_file_operations,
1da177e4 8904 .getroot = nfs4_proc_get_root,
281cad46 8905 .submount = nfs4_submount,
ff9099f2 8906 .try_mount = nfs4_try_mount,
1da177e4
LT		 8907 .getattr = nfs4_proc_getattr,
8908 .setattr = nfs4_proc_setattr,
8909 .lookup = nfs4_proc_lookup,
8910 .access = nfs4_proc_access,
8911 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8912 .create = nfs4_proc_create,
8913 .remove = nfs4_proc_remove,
8914 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8915 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8916 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8917 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8918 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8919 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8920 .link = nfs4_proc_link,
8921 .symlink = nfs4_proc_symlink,
8922 .mkdir = nfs4_proc_mkdir,
8923 .rmdir = nfs4_proc_remove,
8924 .readdir = nfs4_proc_readdir,
8925 .mknod = nfs4_proc_mknod,
8926 .statfs = nfs4_proc_statfs,
8927 .fsinfo = nfs4_proc_fsinfo,
8928 .pathconf = nfs4_proc_pathconf,
e9326dca 8929 .set_capabilities = nfs4_server_capabilities,
1da177e4 8930 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8931 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8932 .read_setup = nfs4_proc_read_setup,
ec06c096 8933 .read_done = nfs4_read_done,
1da177e4 8934 .write_setup = nfs4_proc_write_setup,
788e7a89 8935 .write_done = nfs4_write_done,
1da177e4 8936 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8937 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8938 .commit_done = nfs4_commit_done,
1da177e4 8939 .lock = nfs4_proc_lock,
e50a1c2e 8940 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8941 .close_context = nfs4_close_context,
2b484297 8942 .open_context = nfs4_atomic_open,
011e2a7f 8943 .have_delegation = nfs4_have_delegation,
57ec14c5 8944 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8945 .alloc_client = nfs4_alloc_client,
45a52a02 8946 .init_client = nfs4_init_client,
cdb7eced 8947 .free_client = nfs4_free_client,
1179acc6
BS		 8948 .create_server = nfs4_create_server,
8949 .clone_server = nfs_clone_server,
1da177e4
LT		 8950};
8951
64c2ce8b 8952static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
98e9cb57 8953 .name = XATTR_NAME_NFSV4_ACL,
64c2ce8b
AK		 8954 .list = nfs4_xattr_list_nfs4_acl,
8955 .get = nfs4_xattr_get_nfs4_acl,
8956 .set = nfs4_xattr_set_nfs4_acl,
8957};
8958
8959const struct xattr_handler *nfs4_xattr_handlers[] = {
8960 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8961#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8962 &nfs4_xattr_nfs4_label_handler,
8963#endif
64c2ce8b
AK		 8964 NULL
8965};
8966
1da177e4
LT		 8967/*
8968 * Local variables:
8969 * c-basic-offset: 8
8970 * End:
8971 */
Linux 6.x block layer and io_uring tree(s)