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NFS: Fix an Oops in the pNFS files and flexfiles connection setup to the DS
[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:
183d9e7b 430 case -NFS4ERR_RECALLCONFLICT:
b3c2aa07
TM		 431 exception->delay = 1;
432 return 0;
433
a8a4ae3a 434 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 435 case -NFS4ERR_OLD_STATEID:
436 exception->retry = 1;
b064eca2
TM		 437 break;
438 case -NFS4ERR_BADOWNER:
439 /* The following works around a Linux server bug! */
440 case -NFS4ERR_BADNAME:
441 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
442 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
443 exception->retry = 1;
444 printk(KERN_WARNING "NFS: v4 server %s "
445 "does not accept raw "
446 "uid/gids. "
447 "Reenabling the idmapper.\n",
448 server->nfs_client->cl_hostname);
449 }
65de872e
TM		 450 }
451 /* We failed to handle the error */
452 return nfs4_map_errors(ret);
0400a6b0 453wait_on_recovery:
b3c2aa07
TM		 454 exception->recovering = 1;
455 return 0;
456}
457
458/* This is the error handling routine for processes that are allowed
459 * to sleep.
460 */
461int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
462{
463 struct nfs_client *clp = server->nfs_client;
464 int ret;
465
466 ret = nfs4_do_handle_exception(server, errorcode, exception);
467 if (exception->delay) {
468 ret = nfs4_delay(server->client, &exception->timeout);
469 goto out_retry;
470 }
471 if (exception->recovering) {
472 ret = nfs4_wait_clnt_recover(clp);
473 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
474 return -EIO;
475 goto out_retry;
476 }
477 return ret;
478out_retry:
a2c0b9e2
TM		 479 if (ret == 0)
480 exception->retry = 1;
481 return ret;
65de872e
TM		 482}
483
037fc980
TM		 484static int
485nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
486 int errorcode, struct nfs4_exception *exception)
487{
488 struct nfs_client *clp = server->nfs_client;
489 int ret;
490
491 ret = nfs4_do_handle_exception(server, errorcode, exception);
492 if (exception->delay) {
493 rpc_delay(task, nfs4_update_delay(&exception->timeout));
494 goto out_retry;
495 }
496 if (exception->recovering) {
497 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
498 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
499 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
500 goto out_retry;
501 }
519ae255 502 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
037fc980
TM		 503 ret = -EIO;
504 return ret;
505out_retry:
a2c0b9e2
TM		 506 if (ret == 0)
507 exception->retry = 1;
508 return ret;
65de872e
TM		 509}
510
037fc980
TM		 511static int
512nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
513 struct nfs4_state *state, long *timeout)
514{
515 struct nfs4_exception exception = {
516 .state = state,
517 };
518
519 if (task->tk_status >= 0)
520 return 0;
521 if (timeout)
522 exception.timeout = *timeout;
523 task->tk_status = nfs4_async_handle_exception(task, server,
524 task->tk_status,
525 &exception);
526 if (exception.delay && timeout)
527 *timeout = exception.timeout;
528 if (exception.retry)
529 return -EAGAIN;
530 return 0;
531}
532
a5250def
WAA		 533/*
534 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
535 * or 'false' otherwise.
536 */
537static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
538{
539 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
540
541 if (flavor == RPC_AUTH_GSS_KRB5I ||
542 flavor == RPC_AUTH_GSS_KRB5P)
543 return true;
544
545 return false;
546}
65de872e 547
452e9352 548static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 549{
1da177e4
LT		 550 spin_lock(&clp->cl_lock);
551 if (time_before(clp->cl_last_renewal,timestamp))
552 clp->cl_last_renewal = timestamp;
553 spin_unlock(&clp->cl_lock);
554}
555
452e9352
TM		 556static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
557{
be824167
TM		 558 struct nfs_client *clp = server->nfs_client;
559
560 if (!nfs4_has_session(clp))
561 do_renew_lease(clp, timestamp);
452e9352
TM		 562}
563
2a3eb2b9
CL		 564struct nfs4_call_sync_data {
565 const struct nfs_server *seq_server;
566 struct nfs4_sequence_args *seq_args;
567 struct nfs4_sequence_res *seq_res;
568};
569
be3a5d23
TM		 570void nfs4_init_sequence(struct nfs4_sequence_args *args,
571 struct nfs4_sequence_res *res, int cache_reply)
a9c92d6b
CL		 572{
573 args->sa_slot = NULL;
574 args->sa_cache_this = cache_reply;
575 args->sa_privileged = 0;
576
577 res->sr_slot = NULL;
578}
579
580static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
581{
582 args->sa_privileged = 1;
583}
584
cb04ad2a
PT		 585int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
586 struct nfs4_sequence_args *args,
587 struct nfs4_sequence_res *res,
588 struct rpc_task *task)
3bd2384a 589{
3bd2384a
CL		 590 struct nfs4_slot *slot;
591
592 /* slot already allocated? */
593 if (res->sr_slot != NULL)
594 goto out_start;
595
596 spin_lock(&tbl->slot_tbl_lock);
597 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
598 goto out_sleep;
599
600 slot = nfs4_alloc_slot(tbl);
601 if (IS_ERR(slot)) {
602 if (slot == ERR_PTR(-ENOMEM))
603 task->tk_timeout = HZ >> 2;
604 goto out_sleep;
605 }
606 spin_unlock(&tbl->slot_tbl_lock);
607
608 args->sa_slot = slot;
609 res->sr_slot = slot;
610
611out_start:
612 rpc_call_start(task);
613 return 0;
614
615out_sleep:
616 if (args->sa_privileged)
617 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
618 NULL, RPC_PRIORITY_PRIVILEGED);
619 else
620 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
621 spin_unlock(&tbl->slot_tbl_lock);
622 return -EAGAIN;
623}
cb04ad2a 624EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
3bd2384a
CL		 625
626static int nfs40_sequence_done(struct rpc_task *task,
627 struct nfs4_sequence_res *res)
628{
629 struct nfs4_slot *slot = res->sr_slot;
630 struct nfs4_slot_table *tbl;
631
cab92c19 632 if (slot == NULL)
3bd2384a
CL		 633 goto out;
634
635 tbl = slot->table;
636 spin_lock(&tbl->slot_tbl_lock);
637 if (!nfs41_wake_and_assign_slot(tbl, slot))
638 nfs4_free_slot(tbl, slot);
639 spin_unlock(&tbl->slot_tbl_lock);
640
641 res->sr_slot = NULL;
642out:
643 return 1;
644}
645
cccef3b9
AA		 646#if defined(CONFIG_NFS_V4_1)
647
d185a334 648static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 649{
e3725ec0 650 struct nfs4_session *session;
13615871 651 struct nfs4_slot_table *tbl;
a13ce7c6 652 struct nfs4_slot *slot = res->sr_slot;
c10e4498 653 bool send_new_highest_used_slotid = false;
13615871 654
a13ce7c6 655 tbl = slot->table;
e3725ec0 656 session = tbl->session;
ea028ac9 657
35dc1d74 658 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 659 /* Be nice to the server: try to ensure that the last transmitted
660 * value for highest_user_slotid <= target_highest_slotid
661 */
662 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
663 send_new_highest_used_slotid = true;
664
a13ce7c6 665 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 666 send_new_highest_used_slotid = false;
667 goto out_unlock;
668 }
a13ce7c6 669 nfs4_free_slot(tbl, slot);
c10e4498
TM		 670
671 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
672 send_new_highest_used_slotid = false;
b75ad4cd 673out_unlock:
35dc1d74 674 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 675 res->sr_slot = NULL;
c10e4498 676 if (send_new_highest_used_slotid)
3f10a6af 677 nfs41_notify_server(session->clp);
13615871
AA		 678}
679
f9c96fcc 680int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 681{
e3725ec0 682 struct nfs4_session *session;
a13ce7c6 683 struct nfs4_slot *slot = res->sr_slot;
14516c3a 684 struct nfs_client *clp;
ac20d163 685 bool interrupted = false;
85563073 686 int ret = 1;
b0df806c 687
a13ce7c6
TM		 688 if (slot == NULL)
689 goto out_noaction;
468f8613
BS		 690 /* don't increment the sequence number if the task wasn't sent */
691 if (!RPC_WAS_SENT(task))
b0df806c
AA		 692 goto out;
693
e3725ec0 694 session = slot->table->session;
933602e3 695
ac20d163
TM		 696 if (slot->interrupted) {
697 slot->interrupted = 0;
698 interrupted = true;
699 }
700
2f92ae34 701 trace_nfs4_sequence_done(session, res);
691daf3b 702 /* Check the SEQUENCE operation status */
14516c3a
TM		 703 switch (res->sr_status) {
704 case 0:
b0df806c 705 /* Update the slot's sequence and clientid lease timer */
933602e3 706 ++slot->seq_nr;
e3725ec0 707 clp = session->clp;
8e63b6a8 708 do_renew_lease(clp, res->sr_timestamp);
0629e370 709 /* Check sequence flags */
b15c7cdd 710 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
464ee9f9 711 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 712 break;
ac20d163
TM		 713 case 1:
714 /*
715 * sr_status remains 1 if an RPC level error occurred.
716 * The server may or may not have processed the sequence
717 * operation..
718 * Mark the slot as having hosted an interrupted RPC call.
719 */
720 slot->interrupted = 1;
721 goto out;
14516c3a
TM		 722 case -NFS4ERR_DELAY:
723 /* The server detected a resend of the RPC call and
724 * returned NFS4ERR_DELAY as per Section 2.10.6.2
725 * of RFC5661.
726 */
df2fabff 727 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 728 __func__,
df2fabff 729 slot->slot_nr,
933602e3 730 slot->seq_nr);
14516c3a 731 goto out_retry;
85563073
TM		 732 case -NFS4ERR_BADSLOT:
733 /*
734 * The slot id we used was probably retired. Try again
735 * using a different slot id.
736 */
e8794440
TM		 737 goto retry_nowait;
738 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 739 /*
740 * Was the last operation on this sequence interrupted?
741 * If so, retry after bumping the sequence number.
742 */
743 if (interrupted) {
744 ++slot->seq_nr;
745 goto retry_nowait;
746 }
e8794440
TM		 747 /*
748 * Could this slot have been previously retired?
749 * If so, then the server may be expecting seq_nr = 1!
750 */
8e63b6a8
TM		 751 if (slot->seq_nr != 1) {
752 slot->seq_nr = 1;
753 goto retry_nowait;
754 }
755 break;
e8794440
TM		 756 case -NFS4ERR_SEQ_FALSE_RETRY:
757 ++slot->seq_nr;
758 goto retry_nowait;
14516c3a
TM		 759 default:
760 /* Just update the slot sequence no. */
933602e3 761 ++slot->seq_nr;
b0df806c
AA		 762 }
763out:
764 /* The session may be reset by one of the error handlers. */
765 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 766 nfs41_sequence_free_slot(res);
a13ce7c6 767out_noaction:
85563073 768 return ret;
e8794440
TM		 769retry_nowait:
770 if (rpc_restart_call_prepare(task)) {
771 task->tk_status = 0;
772 ret = 0;
773 }
774 goto out;
14516c3a 775out_retry:
d05dd4e9 776 if (!rpc_restart_call(task))
14516c3a
TM		 777 goto out;
778 rpc_delay(task, NFS4_POLL_RETRY_MAX);
779 return 0;
b0df806c 780}
f9c96fcc 781EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 782
2c4b131d 783int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 784{
e3725ec0 785 if (res->sr_slot == NULL)
14516c3a 786 return 1;
3bd2384a
CL		 787 if (!res->sr_slot->table->session)
788 return nfs40_sequence_done(task, res);
14516c3a 789 return nfs41_sequence_done(task, res);
df896455 790}
2c4b131d 791EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 792
dc70d7b3 793int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 794 struct nfs4_sequence_args *args,
795 struct nfs4_sequence_res *res,
ce5039c1
AA		 796 struct rpc_task *task)
797{
fbcd4abc
AA		 798 struct nfs4_slot *slot;
799 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 800
801 dprintk("--> %s\n", __func__);
ce5039c1 802 /* slot already allocated? */
dfb4f309 803 if (res->sr_slot != NULL)
d9afbd1b 804 goto out_success;
ce5039c1 805
fbcd4abc
AA		 806 tbl = &session->fc_slot_table;
807
69d206b5
TM		 808 task->tk_timeout = 0;
809
fbcd4abc 810 spin_lock(&tbl->slot_tbl_lock);
774d5f14 811 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 812 !args->sa_privileged) {
0b1c8fc4 813 /* The state manager will wait until the slot table is empty */
0b1c8fc4 814 dprintk("%s session is draining\n", __func__);
7b939a3f 815 goto out_sleep;
689cf5c1
AB		 816 }
817
2dc03b7f 818 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 819 if (IS_ERR(slot)) {
820 /* If out of memory, try again in 1/4 second */
821 if (slot == ERR_PTR(-ENOMEM))
822 task->tk_timeout = HZ >> 2;
fbcd4abc 823 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 824 goto out_sleep;
fbcd4abc
AA		 825 }
826 spin_unlock(&tbl->slot_tbl_lock);
827
2b2fa717 828 args->sa_slot = slot;
fbcd4abc 829
e8d92382 830 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 831 slot->slot_nr, slot->seq_nr);
fbcd4abc 832
dfb4f309 833 res->sr_slot = slot;
8e63b6a8 834 res->sr_timestamp = jiffies;
2a6e26cd 835 res->sr_status_flags = 0;
fbcd4abc
AA		 836 /*
837 * sr_status is only set in decode_sequence, and so will remain
838 * set to 1 if an rpc level failure occurs.
839 */
840 res->sr_status = 1;
2f92ae34 841 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 842out_success:
843 rpc_call_start(task);
ce5039c1 844 return 0;
7b939a3f 845out_sleep:
8fe72bac
TM		 846 /* Privileged tasks are queued with top priority */
847 if (args->sa_privileged)
1e1093c7
TM		 848 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
849 NULL, RPC_PRIORITY_PRIVILEGED);
850 else
851 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 852 spin_unlock(&tbl->slot_tbl_lock);
853 return -EAGAIN;
ce5039c1 854}
dc70d7b3 855EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 856
5a580e0a
CL		 857static int nfs4_setup_sequence(const struct nfs_server *server,
858 struct nfs4_sequence_args *args,
859 struct nfs4_sequence_res *res,
860 struct rpc_task *task)
ce5039c1 861{
035168ab 862 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 863 int ret = 0;
864
3bd2384a 865 if (!session)
cb04ad2a
PT		 866 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
867 args, res, task);
035168ab 868
e8d92382 869 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 870 __func__, session->clp, session, res->sr_slot ?
e8d92382 871 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 872
9d12b216 873 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 874
ce5039c1
AA		 875 dprintk("<-- %s status=%d\n", __func__, ret);
876 return ret;
877}
878
ce5039c1
AA		 879static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
880{
2a3eb2b9 881 struct nfs4_call_sync_data *data = calldata;
6ba7db34 882 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 883
035168ab
TM		 884 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
885
d9afbd1b 886 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 887}
888
69ab40c4
AA		 889static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
890{
2a3eb2b9 891 struct nfs4_call_sync_data *data = calldata;
69ab40c4 892
14516c3a 893 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 894}
895
17280175 896static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 897 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 898 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 899};
900
3bd2384a
CL		 901#else /* !CONFIG_NFS_V4_1 */
902
9915ea7e
CL		 903static int nfs4_setup_sequence(const struct nfs_server *server,
904 struct nfs4_sequence_args *args,
905 struct nfs4_sequence_res *res,
906 struct rpc_task *task)
907{
cb04ad2a
PT		 908 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
909 args, res, task);
9915ea7e
CL		 910}
911
2c4b131d
PT		 912int nfs4_sequence_done(struct rpc_task *task,
913 struct nfs4_sequence_res *res)
9915ea7e 914{
3bd2384a 915 return nfs40_sequence_done(task, res);
9915ea7e 916}
2c4b131d 917EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 918
919#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 920
921static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
922{
923 struct nfs4_call_sync_data *data = calldata;
924 nfs4_setup_sequence(data->seq_server,
925 data->seq_args, data->seq_res, task);
926}
927
928static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
929{
930 struct nfs4_call_sync_data *data = calldata;
931 nfs4_sequence_done(task, data->seq_res);
932}
933
934static const struct rpc_call_ops nfs40_call_sync_ops = {
935 .rpc_call_prepare = nfs40_call_sync_prepare,
936 .rpc_call_done = nfs40_call_sync_done,
937};
938
7c513058
BS		 939static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
940 struct nfs_server *server,
ce5039c1
AA		 941 struct rpc_message *msg,
942 struct nfs4_sequence_args *args,
8fe72bac 943 struct nfs4_sequence_res *res)
ce5039c1
AA		 944{
945 int ret;
946 struct rpc_task *task;
9915ea7e 947 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 948 struct nfs4_call_sync_data data = {
035168ab 949 .seq_server = server,
ce5039c1
AA		 950 .seq_args = args,
951 .seq_res = res,
ce5039c1
AA		 952 };
953 struct rpc_task_setup task_setup = {
7c513058 954 .rpc_client = clnt,
ce5039c1 955 .rpc_message = msg,
9915ea7e 956 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 957 .callback_data = &data
958 };
959
ce5039c1
AA		 960 task = rpc_run_task(&task_setup);
961 if (IS_ERR(task))
962 ret = PTR_ERR(task);
963 else {
964 ret = task->tk_status;
965 rpc_put_task(task);
966 }
967 return ret;
968}
969
7c513058
BS		 970int nfs4_call_sync(struct rpc_clnt *clnt,
971 struct nfs_server *server,
e73b83f2
BS		 972 struct rpc_message *msg,
973 struct nfs4_sequence_args *args,
974 struct nfs4_sequence_res *res,
975 int cache_reply)
976{
a9c92d6b 977 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 978 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 979}
cccef3b9 980
38478b24 981static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 982{
38478b24 983 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 984
38478b24 985 spin_lock(&dir->i_lock);
359d7d1c 986 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 987 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 988 nfs_force_lookup_revalidate(dir);
a9a4a87a 989 dir->i_version = cinfo->after;
3235b403 990 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
de242c0b 991 nfs_fscache_invalidate(dir);
38478b24 992 spin_unlock(&dir->i_lock);
1da177e4
LT		 993}
994
e56e0b78 995struct nfs4_opendata {
c6d00e63 996 struct kref kref;
e56e0b78
TM		 997 struct nfs_openargs o_arg;
998 struct nfs_openres o_res;
cdd4e68b
TM		 999 struct nfs_open_confirmargs c_arg;
1000 struct nfs_open_confirmres c_res;
6926afd1
TM		 1001 struct nfs4_string owner_name;
1002 struct nfs4_string group_name;
a49c2691 1003 struct nfs4_label *a_label;
e56e0b78 1004 struct nfs_fattr f_attr;
1775fd3e 1005 struct nfs4_label *f_label;
e56e0b78 1006 struct dentry *dir;
82a2c1b7 1007 struct dentry *dentry;
e56e0b78 1008 struct nfs4_state_owner *owner;
aac00a8d 1009 struct nfs4_state *state;
e56e0b78 1010 struct iattr attrs;
26e976a8 1011 unsigned long timestamp;
3e309914 1012 unsigned int rpc_done : 1;
5bc2afc2 1013 unsigned int file_created : 1;
bdeca1b7 1014 unsigned int is_recover : 1;
24ac23ab
TM		 1015 int rpc_status;
1016 int cancelled;
e56e0b78
TM		 1017};
1018
49f9a0fa
TM		 1019static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1020 int err, struct nfs4_exception *exception)
1021{
1022 if (err != -EINVAL)
1023 return false;
1024 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1025 return false;
1026 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1027 exception->retry = 1;
1028 return true;
1029}
1030
6ae37339
TM		 1031static u32
1032nfs4_map_atomic_open_share(struct nfs_server *server,
1033 fmode_t fmode, int openflags)
1034{
1035 u32 res = 0;
1036
1037 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1038 case FMODE_READ:
1039 res = NFS4_SHARE_ACCESS_READ;
1040 break;
1041 case FMODE_WRITE:
1042 res = NFS4_SHARE_ACCESS_WRITE;
1043 break;
1044 case FMODE_READ|FMODE_WRITE:
1045 res = NFS4_SHARE_ACCESS_BOTH;
1046 }
1047 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1048 goto out;
1049 /* Want no delegation if we're using O_DIRECT */
1050 if (openflags & O_DIRECT)
1051 res |= NFS4_SHARE_WANT_NO_DELEG;
1052out:
1053 return res;
1054}
1055
49f9a0fa
TM		 1056static enum open_claim_type4
1057nfs4_map_atomic_open_claim(struct nfs_server *server,
1058 enum open_claim_type4 claim)
1059{
1060 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1061 return claim;
1062 switch (claim) {
1063 default:
1064 return claim;
1065 case NFS4_OPEN_CLAIM_FH:
1066 return NFS4_OPEN_CLAIM_NULL;
1067 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1068 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1069 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1070 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1071 }
1072}
2ced46c2
TM		 1073
1074static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1075{
1076 p->o_res.f_attr = &p->f_attr;
1775fd3e 1077 p->o_res.f_label = p->f_label;
c1d51931
TM		 1078 p->o_res.seqid = p->o_arg.seqid;
1079 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 1080 p->o_res.server = p->o_arg.server;
5f657530 1081 p->o_res.access_request = p->o_arg.access;
2ced46c2 1082 nfs_fattr_init(&p->f_attr);
6926afd1 1083 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 1084}
1085
82a2c1b7 1086static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 1087 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 1088 const struct iattr *attrs,
1775fd3e 1089 struct nfs4_label *label,
4a1c0893 1090 enum open_claim_type4 claim,
8535b2be 1091 gfp_t gfp_mask)
e56e0b78 1092{
82a2c1b7 1093 struct dentry *parent = dget_parent(dentry);
2b0143b5 1094 struct inode *dir = d_inode(parent);
e56e0b78 1095 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1096 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 1097 struct nfs4_opendata *p;
1098
8535b2be 1099 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1100 if (p == NULL)
1101 goto err;
14c43f76
DQ		 1102
1103 p->f_label = nfs4_label_alloc(server, gfp_mask);
1104 if (IS_ERR(p->f_label))
1105 goto err_free_p;
1106
a49c2691
KM		 1107 p->a_label = nfs4_label_alloc(server, gfp_mask);
1108 if (IS_ERR(p->a_label))
1109 goto err_free_f;
1110
63f5f796
TM		 1111 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1112 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1113 if (IS_ERR(p->o_arg.seqid))
14c43f76 1114 goto err_free_label;
82a2c1b7
AV		 1115 nfs_sb_active(dentry->d_sb);
1116 p->dentry = dget(dentry);
e56e0b78
TM		 1117 p->dir = parent;
1118 p->owner = sp;
1119 atomic_inc(&sp->so_count);
dc0b027d
TM		 1120 p->o_arg.open_flags = flags;
1121 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
6ae37339
TM		 1122 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1123 fmode, flags);
ae2bb032
WAA		 1124 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1125 * will return permission denied for all bits until close */
1126 if (!(flags & O_EXCL)) {
1127 /* ask server to check for all possible rights as results
1128 * are cached */
1129 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1130 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1131 }
7539bbab 1132 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1133 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1134 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1135 p->o_arg.name = &dentry->d_name;
e56e0b78 1136 p->o_arg.server = server;
aa9c2669 1137 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1138 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
a49c2691 1139 p->o_arg.label = nfs4_label_copy(p->a_label, label);
49f9a0fa
TM		 1140 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1141 switch (p->o_arg.claim) {
4a1c0893
TM		 1142 case NFS4_OPEN_CLAIM_NULL:
1143 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1144 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1145 p->o_arg.fh = NFS_FH(dir);
1146 break;
1147 case NFS4_OPEN_CLAIM_PREVIOUS:
1148 case NFS4_OPEN_CLAIM_FH:
1149 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1150 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1151 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1152 }
536e43d1 1153 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1154 __u32 verf[2];
d77d76ff 1155
e56e0b78
TM		 1156 p->o_arg.u.attrs = &p->attrs;
1157 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1158
1159 verf[0] = jiffies;
1160 verf[1] = current->pid;
1161 memcpy(p->o_arg.u.verifier.data, verf,
1162 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1163 }
cdd4e68b
TM		 1164 p->c_arg.fh = &p->o_res.fh;
1165 p->c_arg.stateid = &p->o_res.stateid;
1166 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1167 nfs4_init_opendata_res(p);
c6d00e63 1168 kref_init(&p->kref);
e56e0b78 1169 return p;
14c43f76
DQ		 1170
1171err_free_label:
a49c2691
KM		 1172 nfs4_label_free(p->a_label);
1173err_free_f:
14c43f76
DQ		 1174 nfs4_label_free(p->f_label);
1175err_free_p:
e56e0b78
TM		 1176 kfree(p);
1177err:
1178 dput(parent);
1179 return NULL;
1180}
1181
c6d00e63 1182static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1183{
c6d00e63
TM		 1184 struct nfs4_opendata *p = container_of(kref,
1185 struct nfs4_opendata, kref);
82a2c1b7 1186 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1187
1188 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1189 if (p->state != NULL)
1190 nfs4_put_open_state(p->state);
c6d00e63 1191 nfs4_put_state_owner(p->owner);
14c43f76 1192
a49c2691 1193 nfs4_label_free(p->a_label);
14c43f76
DQ		 1194 nfs4_label_free(p->f_label);
1195
c6d00e63 1196 dput(p->dir);
82a2c1b7
AV		 1197 dput(p->dentry);
1198 nfs_sb_deactive(sb);
6926afd1 1199 nfs_fattr_free_names(&p->f_attr);
e911b815 1200 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1201 kfree(p);
1202}
1203
1204static void nfs4_opendata_put(struct nfs4_opendata *p)
1205{
1206 if (p != NULL)
1207 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1208}
1209
06f814a3
TM		 1210static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1211{
06f814a3
TM		 1212 int ret;
1213
06f814a3 1214 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1215 return ret;
1216}
1217
24311f88
TM		 1218static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1219 fmode_t fmode)
1220{
1221 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1222 case FMODE_READ|FMODE_WRITE:
1223 return state->n_rdwr != 0;
1224 case FMODE_WRITE:
1225 return state->n_wronly != 0;
1226 case FMODE_READ:
1227 return state->n_rdonly != 0;
1228 }
1229 WARN_ON_ONCE(1);
1230 return false;
1231}
1232
dc0b027d 1233static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1234{
1235 int ret = 0;
dc0b027d 1236
536e43d1 1237 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1238 goto out;
1239 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1240 case FMODE_READ:
88069f77
TM		 1241 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1242 && state->n_rdonly != 0;
6ee41268
TM		 1243 break;
1244 case FMODE_WRITE:
88069f77
TM		 1245 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1246 && state->n_wronly != 0;
6ee41268
TM		 1247 break;
1248 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1249 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1250 && state->n_rdwr != 0;
6ee41268 1251 }
dc0b027d 1252out:
6ee41268
TM		 1253 return ret;
1254}
1255
2a606188
TM		 1256static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1257 enum open_claim_type4 claim)
aac00a8d 1258{
652f89f6
TM		 1259 if (delegation == NULL)
1260 return 0;
dc0b027d 1261 if ((delegation->type & fmode) != fmode)
aac00a8d 1262 return 0;
d25be546
TM		 1263 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1264 return 0;
2a606188
TM		 1265 switch (claim) {
1266 case NFS4_OPEN_CLAIM_NULL:
1267 case NFS4_OPEN_CLAIM_FH:
1268 break;
1269 case NFS4_OPEN_CLAIM_PREVIOUS:
1270 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1271 break;
1272 default:
1273 return 0;
1274 }
b7391f44 1275 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1276 return 1;
1277}
1278
dc0b027d 1279static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1280{
dc0b027d 1281 switch (fmode) {
e7616923
TM		 1282 case FMODE_WRITE:
1283 state->n_wronly++;
1284 break;
1285 case FMODE_READ:
1286 state->n_rdonly++;
1287 break;
1288 case FMODE_READ|FMODE_WRITE:
1289 state->n_rdwr++;
1290 }
dc0b027d 1291 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1292}
1293
4f14c194
TM		 1294static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1295{
1296 struct nfs_client *clp = state->owner->so_server->nfs_client;
1297 bool need_recover = false;
1298
1299 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1300 need_recover = true;
1301 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1302 need_recover = true;
1303 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1304 need_recover = true;
1305 if (need_recover)
1306 nfs4_state_mark_reclaim_nograce(clp, state);
1307}
1308
e999e80e
TM		 1309static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1310 nfs4_stateid *stateid)
1311{
1312 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1313 return true;
4f14c194
TM		 1314 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1315 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1316 return true;
4f14c194 1317 }
e999e80e
TM		 1318 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1319 return true;
1320 return false;
1321}
1322
f95549cf
TM		 1323static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1324{
3c38cbe2
TM		 1325 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1326 return;
f95549cf
TM		 1327 if (state->n_wronly)
1328 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1329 if (state->n_rdonly)
1330 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1331 if (state->n_rdwr)
1332 set_bit(NFS_O_RDWR_STATE, &state->flags);
3c38cbe2 1333 set_bit(NFS_OPEN_STATE, &state->flags);
f95549cf
TM		 1334}
1335
226056c5 1336static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
4a1e2feb 1337 nfs4_stateid *arg_stateid,
226056c5 1338 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1339{
226056c5
TM		 1340 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1341 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1342 case FMODE_WRITE:
1343 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1344 break;
1345 case FMODE_READ:
1346 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1347 break;
1348 case 0:
1349 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1350 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1351 clear_bit(NFS_OPEN_STATE, &state->flags);
1352 }
1353 if (stateid == NULL)
1354 return;
f95549cf 1355 /* Handle races with OPEN */
4a1e2feb
TM		 1356 if (!nfs4_stateid_match_other(arg_stateid, &state->open_stateid) ||
1357 (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1358 !nfs4_stateid_is_newer(stateid, &state->open_stateid))) {
f95549cf 1359 nfs_resync_open_stateid_locked(state);
226056c5 1360 return;
f95549cf 1361 }
003707c7 1362 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1363 nfs4_stateid_copy(&state->stateid, stateid);
1364 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1365}
1366
4a1e2feb
TM		 1367static void nfs_clear_open_stateid(struct nfs4_state *state,
1368 nfs4_stateid *arg_stateid,
1369 nfs4_stateid *stateid, fmode_t fmode)
226056c5
TM		 1370{
1371 write_seqlock(&state->seqlock);
4a1e2feb 1372 nfs_clear_open_stateid_locked(state, arg_stateid, stateid, fmode);
226056c5 1373 write_sequnlock(&state->seqlock);
4f14c194
TM		 1374 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1375 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1376}
1377
dc0b027d 1378static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1379{
dc0b027d 1380 switch (fmode) {
003707c7
TM		 1381 case FMODE_READ:
1382 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1383 break;
1384 case FMODE_WRITE:
1385 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1386 break;
1387 case FMODE_READ|FMODE_WRITE:
1388 set_bit(NFS_O_RDWR_STATE, &state->flags);
1389 }
e999e80e
TM		 1390 if (!nfs_need_update_open_stateid(state, stateid))
1391 return;
1392 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1393 nfs4_stateid_copy(&state->stateid, stateid);
1394 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1395}
1396
dc0b027d 1397static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1398{
8bda4e4c
TM		 1399 /*
1400 * Protect the call to nfs4_state_set_mode_locked and
1401 * serialise the stateid update
1402 */
361cad3c 1403 spin_lock(&state->owner->so_lock);
8bda4e4c 1404 write_seqlock(&state->seqlock);
003707c7 1405 if (deleg_stateid != NULL) {
f597c537 1406 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1407 set_bit(NFS_DELEGATED_STATE, &state->flags);
1408 }
1409 if (open_stateid != NULL)
dc0b027d 1410 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c 1411 write_sequnlock(&state->seqlock);
dc0b027d 1412 update_open_stateflags(state, fmode);
ec073428 1413 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1414}
1415
dc0b027d 1416static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1417{
1418 struct nfs_inode *nfsi = NFS_I(state->inode);
1419 struct nfs_delegation *deleg_cur;
1420 int ret = 0;
1421
dc0b027d 1422 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1423
1424 rcu_read_lock();
1425 deleg_cur = rcu_dereference(nfsi->delegation);
1426 if (deleg_cur == NULL)
1427 goto no_delegation;
1428
1429 spin_lock(&deleg_cur->lock);
17f26b12 1430 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1431 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1432 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1433 goto no_delegation_unlock;
1434
1435 if (delegation == NULL)
1436 delegation = &deleg_cur->stateid;
f597c537 1437 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1438 goto no_delegation_unlock;
1439
b7391f44 1440 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1441 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1442 ret = 1;
1443no_delegation_unlock:
1444 spin_unlock(&deleg_cur->lock);
1445no_delegation:
1446 rcu_read_unlock();
1447
1448 if (!ret && open_stateid != NULL) {
dc0b027d 1449 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1450 ret = 1;
1451 }
4f14c194
TM		 1452 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1453 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1454
1455 return ret;
1456}
1457
39071e6f
TM		 1458static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1459 const nfs4_stateid *stateid)
1460{
1461 struct nfs4_state *state = lsp->ls_state;
1462 bool ret = false;
1463
1464 spin_lock(&state->state_lock);
1465 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1466 goto out_noupdate;
1467 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1468 goto out_noupdate;
1469 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1470 ret = true;
1471out_noupdate:
1472 spin_unlock(&state->state_lock);
1473 return ret;
1474}
34310430 1475
dc0b027d 1476static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1477{
1478 struct nfs_delegation *delegation;
1479
1480 rcu_read_lock();
1481 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1482 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1483 rcu_read_unlock();
1484 return;
1485 }
1486 rcu_read_unlock();
57ec14c5 1487 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1488}
1489
6ee41268 1490static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1491{
1492 struct nfs4_state *state = opendata->state;
1493 struct nfs_inode *nfsi = NFS_I(state->inode);
1494 struct nfs_delegation *delegation;
f448badd 1495 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1496 fmode_t fmode = opendata->o_arg.fmode;
2a606188 1497 enum open_claim_type4 claim = opendata->o_arg.claim;
aac00a8d
TM		 1498 nfs4_stateid stateid;
1499 int ret = -EAGAIN;
1500
aac00a8d 1501 for (;;) {
61beef75 1502 spin_lock(&state->owner->so_lock);
dc0b027d 1503 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1504 update_open_stateflags(state, fmode);
6ee41268 1505 spin_unlock(&state->owner->so_lock);
61beef75 1506 goto out_return_state;
6ee41268 1507 }
61beef75 1508 spin_unlock(&state->owner->so_lock);
34310430
TM		 1509 rcu_read_lock();
1510 delegation = rcu_dereference(nfsi->delegation);
2a606188 1511 if (!can_open_delegated(delegation, fmode, claim)) {
34310430 1512 rcu_read_unlock();
aac00a8d 1513 break;
34310430 1514 }
aac00a8d 1515 /* Save the delegation */
f597c537 1516 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1517 rcu_read_unlock();
fa332941 1518 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1519 if (!opendata->is_recover) {
1520 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1521 if (ret != 0)
1522 goto out;
1523 }
aac00a8d 1524 ret = -EAGAIN;
34310430
TM		 1525
1526 /* Try to update the stateid using the delegation */
dc0b027d 1527 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1528 goto out_return_state;
aac00a8d 1529 }
aac00a8d
TM		 1530out:
1531 return ERR_PTR(ret);
1532out_return_state:
1533 atomic_inc(&state->count);
1534 return state;
1535}
1536
e23008ec
AA		 1537static void
1538nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1539{
1540 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1541 struct nfs_delegation *delegation;
1542 int delegation_flags = 0;
1543
1544 rcu_read_lock();
1545 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1546 if (delegation)
1547 delegation_flags = delegation->flags;
1548 rcu_read_unlock();
72d79ff8
TM		 1549 switch (data->o_arg.claim) {
1550 default:
1551 break;
1552 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1553 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
e23008ec
AA		 1554 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1555 "returning a delegation for "
1556 "OPEN(CLAIM_DELEGATE_CUR)\n",
1557 clp->cl_hostname);
72d79ff8
TM		 1558 return;
1559 }
1560 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
e23008ec
AA		 1561 nfs_inode_set_delegation(state->inode,
1562 data->owner->so_cred,
1563 &data->o_res);
1564 else
1565 nfs_inode_reclaim_delegation(state->inode,
1566 data->owner->so_cred,
1567 &data->o_res);
1568}
1569
1570/*
1571 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1572 * and update the nfs4_state.
1573 */
1574static struct nfs4_state *
1575_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1576{
1577 struct inode *inode = data->state->inode;
1578 struct nfs4_state *state = data->state;
1579 int ret;
1580
d2bfda2e
WAA		 1581 if (!data->rpc_done) {
1582 if (data->rpc_status) {
1583 ret = data->rpc_status;
1584 goto err;
1585 }
1586 /* cached opens have already been processed */
1587 goto update;
e23008ec
AA		 1588 }
1589
e23008ec
AA		 1590 ret = nfs_refresh_inode(inode, &data->f_attr);
1591 if (ret)
1592 goto err;
1593
1594 if (data->o_res.delegation_type != 0)
1595 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1596update:
e23008ec
AA		 1597 update_open_stateid(state, &data->o_res.stateid, NULL,
1598 data->o_arg.fmode);
d49f042a 1599 atomic_inc(&state->count);
e23008ec
AA		 1600
1601 return state;
1602err:
1603 return ERR_PTR(ret);
1604
1605}
1606
1607static struct nfs4_state *
1608_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1609{
1610 struct inode *inode;
1611 struct nfs4_state *state = NULL;
1b370bc2 1612 int ret;
24ac23ab 1613
aac00a8d 1614 if (!data->rpc_done) {
6ee41268 1615 state = nfs4_try_open_cached(data);
9759b0fb 1616 trace_nfs4_cached_open(data->state);
aac00a8d
TM		 1617 goto out;
1618 }
1619
1b370bc2 1620 ret = -EAGAIN;
24ac23ab 1621 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1622 goto err;
1775fd3e 1623 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1624 ret = PTR_ERR(inode);
03f28e3a 1625 if (IS_ERR(inode))
1b370bc2
TM		 1626 goto err;
1627 ret = -ENOMEM;
24ac23ab
TM		 1628 state = nfs4_get_open_state(inode, data->owner);
1629 if (state == NULL)
1b370bc2 1630 goto err_put_inode;
e23008ec
AA		 1631 if (data->o_res.delegation_type != 0)
1632 nfs4_opendata_check_deleg(data, state);
34310430 1633 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1634 data->o_arg.fmode);
24ac23ab 1635 iput(inode);
aac00a8d 1636out:
7aa262b5 1637 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1638 return state;
1b370bc2
TM		 1639err_put_inode:
1640 iput(inode);
1641err:
1642 return ERR_PTR(ret);
24ac23ab
TM		 1643}
1644
e23008ec
AA		 1645static struct nfs4_state *
1646nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1647{
1648 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1649 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1650 return _nfs4_opendata_to_nfs4_state(data);
1651}
1652
864472e9
TM		 1653static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1654{
1655 struct nfs_inode *nfsi = NFS_I(state->inode);
1656 struct nfs_open_context *ctx;
1657
1658 spin_lock(&state->inode->i_lock);
1659 list_for_each_entry(ctx, &nfsi->open_files, list) {
1660 if (ctx->state != state)
1661 continue;
1662 get_nfs_open_context(ctx);
1663 spin_unlock(&state->inode->i_lock);
1664 return ctx;
1665 }
1666 spin_unlock(&state->inode->i_lock);
1667 return ERR_PTR(-ENOENT);
1668}
1669
4a1c0893
TM		 1670static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1671 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1672{
1673 struct nfs4_opendata *opendata;
1674
4a1c0893 1675 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1676 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1677 if (opendata == NULL)
1678 return ERR_PTR(-ENOMEM);
1679 opendata->state = state;
1680 atomic_inc(&state->count);
1681 return opendata;
1682}
1683
24311f88
TM		 1684static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1685 fmode_t fmode)
864472e9 1686{
2ced46c2 1687 struct nfs4_state *newstate;
864472e9
TM		 1688 int ret;
1689
24311f88 1690 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
39f897fd 1691 return 0;
dc0b027d
TM		 1692 opendata->o_arg.open_flags = 0;
1693 opendata->o_arg.fmode = fmode;
be36e185
TM		 1694 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1695 NFS_SB(opendata->dentry->d_sb),
1696 fmode, 0);
2ced46c2
TM		 1697 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1698 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1699 nfs4_init_opendata_res(opendata);
b257957e 1700 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1701 if (ret != 0)
1702 return ret;
2ced46c2 1703 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1704 if (IS_ERR(newstate))
1705 return PTR_ERR(newstate);
24311f88
TM		 1706 if (newstate != opendata->state)
1707 ret = -ESTALE;
643168c2 1708 nfs4_close_state(newstate, fmode);
24311f88 1709 return ret;
864472e9
TM		 1710}
1711
1712static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1713{
864472e9
TM		 1714 int ret;
1715
4f14c194
TM		 1716 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1717 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1718 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1719 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1720 /* memory barrier prior to reading state->n_* */
2ced46c2 1721 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1722 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9 1723 smp_rmb();
24311f88
TM		 1724 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1725 if (ret != 0)
1726 return ret;
1727 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1728 if (ret != 0)
1729 return ret;
1730 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1731 if (ret != 0)
1732 return ret;
1ac7e2fd
TM		 1733 /*
1734 * We may have performed cached opens for all three recoveries.
1735 * Check if we need to update the current stateid.
1736 */
1737 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1738 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1739 write_seqlock(&state->seqlock);
1ac7e2fd 1740 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1741 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1742 write_sequnlock(&state->seqlock);
1ac7e2fd 1743 }
864472e9
TM		 1744 return 0;
1745}
1746
1da177e4
LT		 1747/*
1748 * OPEN_RECLAIM:
1749 * reclaim state on the server after a reboot.
1da177e4 1750 */
539cd03a 1751static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1752{
1ac7e2fd 1753 struct nfs_delegation *delegation;
864472e9 1754 struct nfs4_opendata *opendata;
dc0b027d 1755 fmode_t delegation_type = 0;
1da177e4
LT		 1756 int status;
1757
4a1c0893
TM		 1758 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1759 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1760 if (IS_ERR(opendata))
1761 return PTR_ERR(opendata);
1ac7e2fd
TM		 1762 rcu_read_lock();
1763 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1764 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1765 delegation_type = delegation->type;
1ac7e2fd 1766 rcu_read_unlock();
864472e9
TM		 1767 opendata->o_arg.u.delegation_type = delegation_type;
1768 status = nfs4_open_recover(opendata, state);
c6d00e63 1769 nfs4_opendata_put(opendata);
1da177e4
LT		 1770 return status;
1771}
1772
539cd03a 1773static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1774{
1775 struct nfs_server *server = NFS_SERVER(state->inode);
1776 struct nfs4_exception exception = { };
1777 int err;
1778 do {
539cd03a 1779 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1780 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1781 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1782 continue;
168667c4 1783 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1784 break;
1785 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1786 } while (exception.retry);
1787 return err;
1788}
1789
864472e9
TM		 1790static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1791{
1792 struct nfs_open_context *ctx;
1793 int ret;
1794
1795 ctx = nfs4_state_find_open_context(state);
1796 if (IS_ERR(ctx))
91876b13 1797 return -EAGAIN;
539cd03a 1798 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1799 put_nfs_open_context(ctx);
1800 return ret;
1801}
1802
db4f2e63 1803static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1804{
be76b5b6
TM		 1805 switch (err) {
1806 default:
1807 printk(KERN_ERR "NFS: %s: unhandled error "
1808 "%d.\n", __func__, err);
1809 case 0:
1810 case -ENOENT:
8eee52af 1811 case -EAGAIN:
be76b5b6
TM		 1812 case -ESTALE:
1813 break;
1814 case -NFS4ERR_BADSESSION:
1815 case -NFS4ERR_BADSLOT:
1816 case -NFS4ERR_BAD_HIGH_SLOT:
1817 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1818 case -NFS4ERR_DEADSESSION:
1819 set_bit(NFS_DELEGATED_STATE, &state->flags);
1820 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1821 return -EAGAIN;
1822 case -NFS4ERR_STALE_CLIENTID:
1823 case -NFS4ERR_STALE_STATEID:
1824 set_bit(NFS_DELEGATED_STATE, &state->flags);
1825 case -NFS4ERR_EXPIRED:
1826 /* Don't recall a delegation if it was lost */
1827 nfs4_schedule_lease_recovery(server->nfs_client);
1828 return -EAGAIN;
352297b9
CL		 1829 case -NFS4ERR_MOVED:
1830 nfs4_schedule_migration_recovery(server);
1831 return -EAGAIN;
8ef2f8d4
CL		 1832 case -NFS4ERR_LEASE_MOVED:
1833 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1834 return -EAGAIN;
be76b5b6
TM		 1835 case -NFS4ERR_DELEG_REVOKED:
1836 case -NFS4ERR_ADMIN_REVOKED:
1837 case -NFS4ERR_BAD_STATEID:
db4f2e63 1838 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1839 nfs_inode_find_state_and_recover(state->inode,
1840 stateid);
1841 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1842 return -EAGAIN;
be76b5b6
TM		 1843 case -NFS4ERR_DELAY:
1844 case -NFS4ERR_GRACE:
1845 set_bit(NFS_DELEGATED_STATE, &state->flags);
1846 ssleep(1);
1847 return -EAGAIN;
db4f2e63
TM		 1848 case -ENOMEM:
1849 case -NFS4ERR_DENIED:
1850 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1851 return 0;
be76b5b6 1852 }
1da177e4
LT		 1853 return err;
1854}
1855
24311f88
TM		 1856int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
1857 struct nfs4_state *state, const nfs4_stateid *stateid,
1858 fmode_t type)
db4f2e63
TM		 1859{
1860 struct nfs_server *server = NFS_SERVER(state->inode);
1861 struct nfs4_opendata *opendata;
24311f88 1862 int err = 0;
db4f2e63
TM		 1863
1864 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1865 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1866 if (IS_ERR(opendata))
1867 return PTR_ERR(opendata);
1868 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
5e99b532
JL		 1869 write_seqlock(&state->seqlock);
1870 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1871 write_sequnlock(&state->seqlock);
24311f88
TM		 1872 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1873 switch (type & (FMODE_READ|FMODE_WRITE)) {
1874 case FMODE_READ|FMODE_WRITE:
1875 case FMODE_WRITE:
1876 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1877 if (err)
1878 break;
1879 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1880 if (err)
1881 break;
1882 case FMODE_READ:
1883 err = nfs4_open_recover_helper(opendata, FMODE_READ);
1884 }
db4f2e63
TM		 1885 nfs4_opendata_put(opendata);
1886 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1887}
1888
be05c860
CL		 1889static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1890{
1891 struct nfs4_opendata *data = calldata;
1892
cb04ad2a
PT		 1893 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1894 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 1895}
1896
cdd4e68b
TM		 1897static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1898{
1899 struct nfs4_opendata *data = calldata;
1900
17ead6c8 1901 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1902
cdd4e68b 1903 data->rpc_status = task->tk_status;
26e976a8 1904 if (data->rpc_status == 0) {
f597c537 1905 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1906 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1907 renew_lease(data->o_res.server, data->timestamp);
3e309914 1908 data->rpc_done = 1;
26e976a8 1909 }
cdd4e68b
TM		 1910}
1911
1912static void nfs4_open_confirm_release(void *calldata)
1913{
1914 struct nfs4_opendata *data = calldata;
1915 struct nfs4_state *state = NULL;
1916
1917 /* If this request hasn't been cancelled, do nothing */
1918 if (data->cancelled == 0)
1919 goto out_free;
1920 /* In case of error, no cleanup! */
3e309914 1921 if (!data->rpc_done)
cdd4e68b 1922 goto out_free;
cdd4e68b 1923 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1924 if (!IS_ERR(state))
643168c2 1925 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1926out_free:
c6d00e63 1927 nfs4_opendata_put(data);
cdd4e68b
TM		 1928}
1929
1930static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1931 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1932 .rpc_call_done = nfs4_open_confirm_done,
1933 .rpc_release = nfs4_open_confirm_release,
1934};
1935
1936/*
1937 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1938 */
1939static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1940{
2b0143b5 1941 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 1942 struct rpc_task *task;
5138fde0
TM		 1943 struct rpc_message msg = {
1944 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1945 .rpc_argp = &data->c_arg,
1946 .rpc_resp = &data->c_res,
1947 .rpc_cred = data->owner->so_cred,
1948 };
c970aa85
TM		 1949 struct rpc_task_setup task_setup_data = {
1950 .rpc_client = server->client,
5138fde0 1951 .rpc_message = &msg,
c970aa85
TM		 1952 .callback_ops = &nfs4_open_confirm_ops,
1953 .callback_data = data,
101070ca 1954 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1955 .flags = RPC_TASK_ASYNC,
1956 };
1da177e4
LT		 1957 int status;
1958
17ead6c8 1959 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1960 kref_get(&data->kref);
3e309914
TM		 1961 data->rpc_done = 0;
1962 data->rpc_status = 0;
5138fde0 1963 data->timestamp = jiffies;
e92c1e0d
BC		 1964 if (data->is_recover)
1965 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
c970aa85 1966 task = rpc_run_task(&task_setup_data);
7a1218a2 1967 if (IS_ERR(task))
cdd4e68b 1968 return PTR_ERR(task);
cdd4e68b
TM		 1969 status = nfs4_wait_for_completion_rpc_task(task);
1970 if (status != 0) {
1971 data->cancelled = 1;
1972 smp_wmb();
1973 } else
1974 status = data->rpc_status;
e6b3c4db 1975 rpc_put_task(task);
1da177e4
LT		 1976 return status;
1977}
1978
24ac23ab 1979static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1980{
24ac23ab
TM		 1981 struct nfs4_opendata *data = calldata;
1982 struct nfs4_state_owner *sp = data->owner;
549b19cc 1983 struct nfs_client *clp = sp->so_server->nfs_client;
2a606188 1984 enum open_claim_type4 claim = data->o_arg.claim;
5138fde0 1985
24ac23ab 1986 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1987 goto out_wait;
aac00a8d
TM		 1988 /*
1989 * Check if we still need to send an OPEN call, or if we can use
1990 * a delegation instead.
1991 */
1992 if (data->state != NULL) {
1993 struct nfs_delegation *delegation;
1994
dc0b027d 1995 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1996 goto out_no_action;
aac00a8d
TM		 1997 rcu_read_lock();
1998 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2a606188 1999 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
652f89f6 2000 goto unlock_no_action;
aac00a8d
TM		 2001 rcu_read_unlock();
2002 }
95b72eb0 2003 /* Update client id. */
549b19cc 2004 data->o_arg.clientid = clp->cl_clientid;
2a606188
TM		 2005 switch (claim) {
2006 default:
2007 break;
8188df17
TM		 2008 case NFS4_OPEN_CLAIM_PREVIOUS:
2009 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
2010 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 2011 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 2012 case NFS4_OPEN_CLAIM_FH:
2013 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 2014 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
2015 }
26e976a8 2016 data->timestamp = jiffies;
035168ab 2017 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 2018 &data->o_arg.seq_args,
2240a9e2
TM		 2019 &data->o_res.seq_res,
2020 task) != 0)
2021 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 2022
2023 /* Set the create mode (note dependency on the session type) */
2024 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2025 if (data->o_arg.open_flags & O_EXCL) {
2026 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2027 if (nfs4_has_persistent_session(clp))
2028 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2029 else if (clp->cl_mvops->minor_version > 0)
2030 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2031 }
6ee41268 2032 return;
652f89f6 2033unlock_no_action:
9759b0fb 2034 trace_nfs4_cached_open(data->state);
652f89f6 2035 rcu_read_unlock();
6ee41268
TM		 2036out_no_action:
2037 task->tk_action = NULL;
c8da19b9 2038out_wait:
b75ad4cd 2039 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 2040}
2041
24ac23ab
TM		 2042static void nfs4_open_done(struct rpc_task *task, void *calldata)
2043{
2044 struct nfs4_opendata *data = calldata;
1da177e4 2045
24ac23ab 2046 data->rpc_status = task->tk_status;
d898528c 2047
14516c3a
TM		 2048 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
2049 return;
d898528c 2050
24ac23ab 2051 if (task->tk_status == 0) {
807d66d8
TM		 2052 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2053 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 2054 case S_IFREG:
2055 break;
2056 case S_IFLNK:
24ac23ab 2057 data->rpc_status = -ELOOP;
6f926b5b
TM		 2058 break;
2059 case S_IFDIR:
24ac23ab 2060 data->rpc_status = -EISDIR;
6f926b5b
TM		 2061 break;
2062 default:
24ac23ab 2063 data->rpc_status = -ENOTDIR;
807d66d8 2064 }
6f926b5b 2065 }
26e976a8 2066 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 2067 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2068 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 2069 }
3e309914 2070 data->rpc_done = 1;
24ac23ab 2071}
6f926b5b 2072
24ac23ab
TM		 2073static void nfs4_open_release(void *calldata)
2074{
2075 struct nfs4_opendata *data = calldata;
2076 struct nfs4_state *state = NULL;
2077
2078 /* If this request hasn't been cancelled, do nothing */
2079 if (data->cancelled == 0)
2080 goto out_free;
2081 /* In case of error, no cleanup! */
3e309914 2082 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 2083 goto out_free;
2084 /* In case we need an open_confirm, no cleanup! */
2085 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2086 goto out_free;
24ac23ab 2087 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2088 if (!IS_ERR(state))
643168c2 2089 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 2090out_free:
c6d00e63 2091 nfs4_opendata_put(data);
24ac23ab
TM		 2092}
2093
2094static const struct rpc_call_ops nfs4_open_ops = {
2095 .rpc_call_prepare = nfs4_open_prepare,
2096 .rpc_call_done = nfs4_open_done,
2097 .rpc_release = nfs4_open_release,
2098};
2099
b257957e 2100static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab 2101{
2b0143b5 2102 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 2103 struct nfs_server *server = NFS_SERVER(dir);
2104 struct nfs_openargs *o_arg = &data->o_arg;
2105 struct nfs_openres *o_res = &data->o_res;
2106 struct rpc_task *task;
5138fde0
TM		 2107 struct rpc_message msg = {
2108 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2109 .rpc_argp = o_arg,
2110 .rpc_resp = o_res,
2111 .rpc_cred = data->owner->so_cred,
2112 };
c970aa85
TM		 2113 struct rpc_task_setup task_setup_data = {
2114 .rpc_client = server->client,
5138fde0 2115 .rpc_message = &msg,
c970aa85
TM		 2116 .callback_ops = &nfs4_open_ops,
2117 .callback_data = data,
101070ca 2118 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2119 .flags = RPC_TASK_ASYNC,
2120 };
24ac23ab
TM		 2121 int status;
2122
a9c92d6b 2123 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 2124 kref_get(&data->kref);
3e309914
TM		 2125 data->rpc_done = 0;
2126 data->rpc_status = 0;
2ced46c2 2127 data->cancelled = 0;
bdeca1b7
TM		 2128 data->is_recover = 0;
2129 if (isrecover) {
8fe72bac 2130 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 2131 data->is_recover = 1;
2132 }
c970aa85 2133 task = rpc_run_task(&task_setup_data);
b257957e
AB		 2134 if (IS_ERR(task))
2135 return PTR_ERR(task);
2136 status = nfs4_wait_for_completion_rpc_task(task);
2137 if (status != 0) {
2138 data->cancelled = 1;
2139 smp_wmb();
2140 } else
2141 status = data->rpc_status;
2142 rpc_put_task(task);
2143
2144 return status;
2145}
2146
2147static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2148{
2b0143b5 2149 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2150 struct nfs_openres *o_res = &data->o_res;
2151 int status;
2152
2153 status = nfs4_run_open_task(data, 1);
2154 if (status != 0 || !data->rpc_done)
2155 return status;
2156
6926afd1
TM		 2157 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2158
b257957e
AB		 2159 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2160 status = _nfs4_proc_open_confirm(data);
2161 if (status != 0)
2162 return status;
2163 }
2164
2165 return status;
2166}
2167
f3792d63
TM		 2168/*
2169 * Additional permission checks in order to distinguish between an
2170 * open for read, and an open for execute. This works around the
2171 * fact that NFSv4 OPEN treats read and execute permissions as being
2172 * the same.
2173 * Note that in the non-execute case, we want to turn off permission
2174 * checking if we just created a new file (POSIX open() semantics).
2175 */
6168f62c
WAA		 2176static int nfs4_opendata_access(struct rpc_cred *cred,
2177 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2178 struct nfs4_state *state, fmode_t fmode,
2179 int openflags)
6168f62c
WAA		 2180{
2181 struct nfs_access_entry cache;
2182 u32 mask;
2183
2184 /* access call failed or for some reason the server doesn't
2185 * support any access modes -- defer access call until later */
2186 if (opendata->o_res.access_supported == 0)
2187 return 0;
2188
2189 mask = 0;
f3792d63
TM		 2190 /*
2191 * Use openflags to check for exec, because fmode won't
2192 * always have FMODE_EXEC set when file open for exec.
2193 */
f8d9a897
WAA		 2194 if (openflags & __FMODE_EXEC) {
2195 /* ONLY check for exec rights */
2196 mask = MAY_EXEC;
f3792d63 2197 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2198 mask = MAY_READ;
6168f62c
WAA		 2199
2200 cache.cred = cred;
2201 cache.jiffies = jiffies;
2202 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2203 nfs_access_add_cache(state->inode, &cache);
2204
bbd3a8ee 2205 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2206 return 0;
2207
2208 /* even though OPEN succeeded, access is denied. Close the file */
2209 nfs4_close_state(state, fmode);
998f40b5 2210 return -EACCES;
6168f62c
WAA		 2211}
2212
b257957e
AB		 2213/*
2214 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2215 */
2216static int _nfs4_proc_open(struct nfs4_opendata *data)
2217{
2b0143b5 2218 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2219 struct nfs_server *server = NFS_SERVER(dir);
2220 struct nfs_openargs *o_arg = &data->o_arg;
2221 struct nfs_openres *o_res = &data->o_res;
2222 int status;
2223
2224 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2225 if (!data->rpc_done)
2226 return status;
2227 if (status != 0) {
2228 if (status == -NFS4ERR_BADNAME &&
2229 !(o_arg->open_flags & O_CREAT))
2230 return -ENOENT;
24ac23ab 2231 return status;
08ef7bd3 2232 }
24ac23ab 2233
6926afd1
TM		 2234 nfs_fattr_map_and_free_names(server, &data->f_attr);
2235
5bc2afc2 2236 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2237 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2238 if (o_arg->open_flags & O_EXCL)
2239 data->file_created = 1;
2240 else if (o_res->cinfo.before != o_res->cinfo.after)
2241 data->file_created = 1;
2242 }
0df5dd4a
TM		 2243 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2244 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2245 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2246 status = _nfs4_proc_open_confirm(data);
1da177e4 2247 if (status != 0)
24ac23ab 2248 return status;
1da177e4
LT		 2249 }
2250 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2251 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2252 return 0;
1da177e4
LT		 2253}
2254
d83217c1
AA		 2255static int nfs4_recover_expired_lease(struct nfs_server *server)
2256{
2257 return nfs4_client_recover_expired_lease(server->nfs_client);
2258}
2259
1da177e4
LT		 2260/*
2261 * OPEN_EXPIRED:
2262 * reclaim state on the server after a network partition.
2263 * Assumes caller holds the appropriate lock
2264 */
539cd03a 2265static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2266{
e56e0b78 2267 struct nfs4_opendata *opendata;
864472e9 2268 int ret;
1da177e4 2269
4a1c0893 2270 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2271 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2272 if (IS_ERR(opendata))
2273 return PTR_ERR(opendata);
864472e9 2274 ret = nfs4_open_recover(opendata, state);
35d05778 2275 if (ret == -ESTALE)
3d4ff43d 2276 d_drop(ctx->dentry);
c6d00e63 2277 nfs4_opendata_put(opendata);
864472e9 2278 return ret;
1da177e4
LT		 2279}
2280
a9ed2e25 2281static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2282{
539cd03a 2283 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2284 struct nfs4_exception exception = { };
2285 int err;
2286
2287 do {
539cd03a 2288 err = _nfs4_open_expired(ctx, state);
42113a75 2289 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2290 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2291 continue;
a9ed2e25
TM		 2292 switch (err) {
2293 default:
2294 goto out;
2295 case -NFS4ERR_GRACE:
2296 case -NFS4ERR_DELAY:
2297 nfs4_handle_exception(server, err, &exception);
2298 err = 0;
2299 }
202b50dc 2300 } while (exception.retry);
a9ed2e25 2301out:
202b50dc
TM		 2302 return err;
2303}
2304
1da177e4
LT		 2305static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2306{
1da177e4 2307 struct nfs_open_context *ctx;
864472e9 2308 int ret;
1da177e4 2309
864472e9
TM		 2310 ctx = nfs4_state_find_open_context(state);
2311 if (IS_ERR(ctx))
91876b13 2312 return -EAGAIN;
539cd03a 2313 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2314 put_nfs_open_context(ctx);
2315 return ret;
1da177e4
LT		 2316}
2317
4dfd4f7a
TM		 2318static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2319{
2320 nfs_remove_bad_delegation(state->inode);
2321 write_seqlock(&state->seqlock);
2322 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2323 write_sequnlock(&state->seqlock);
2324 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2325}
2326
2327static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2328{
2329 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2330 nfs_finish_clear_delegation_stateid(state);
2331}
2332
2333static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2334{
2335 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2336 nfs40_clear_delegation_stateid(state);
2337 return nfs4_open_expired(sp, state);
2338}
2339
f062eb6c 2340#if defined(CONFIG_NFS_V4_1)
0c116cad 2341static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2342{
f062eb6c 2343 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2344 nfs4_stateid stateid;
ab7cb0df 2345 struct nfs_delegation *delegation;
0c116cad
TM		 2346 struct rpc_cred *cred;
2347 int status;
3e60ffdd 2348
ab7cb0df
TM		 2349 /* Get the delegation credential for use by test/free_stateid */
2350 rcu_read_lock();
2351 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2352 if (delegation == NULL) {
ab7cb0df 2353 rcu_read_unlock();
0c116cad
TM		 2354 return;
2355 }
2356
2357 nfs4_stateid_copy(&stateid, &delegation->stateid);
2358 cred = get_rpccred(delegation->cred);
2359 rcu_read_unlock();
2360 status = nfs41_test_stateid(server, &stateid, cred);
2361 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df 2362
3e60ffdd
CL		 2363 if (status != NFS_OK) {
2364 /* Free the stateid unless the server explicitly
2365 * informs us the stateid is unrecognized. */
2366 if (status != -NFS4ERR_BAD_STATEID)
0c116cad
TM		 2367 nfs41_free_stateid(server, &stateid, cred);
2368 nfs_finish_clear_delegation_stateid(state);
3e60ffdd 2369 }
ab7cb0df 2370
0c116cad 2371 put_rpccred(cred);
3e60ffdd
CL		 2372}
2373
2374/**
2375 * nfs41_check_open_stateid - possibly free an open stateid
2376 *
2377 * @state: NFSv4 state for an inode
2378 *
2379 * Returns NFS_OK if recovery for this stateid is now finished.
2380 * Otherwise a negative NFS4ERR value is returned.
2381 */
2382static int nfs41_check_open_stateid(struct nfs4_state *state)
2383{
2384 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2385 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2386 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2387 int status;
2388
2389 /* If a state reset has been done, test_stateid is unneeded */
2390 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2391 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2392 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2393 return -NFS4ERR_BAD_STATEID;
2394
ab7cb0df 2395 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2396 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2397 if (status != NFS_OK) {
2398 /* Free the stateid unless the server explicitly
2399 * informs us the stateid is unrecognized. */
2400 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2401 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2402
2403 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2404 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2405 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2406 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2407 }
2408 return status;
2409}
2410
2411static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2412{
eb64cf96 2413 int status;
b01dd1d8 2414
0c116cad 2415 nfs41_check_delegation_stateid(state);
3e60ffdd 2416 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2417 if (status != NFS_OK)
2418 status = nfs4_open_expired(sp, state);
2419 return status;
f062eb6c
BS		 2420}
2421#endif
2422
aa53ed54
JL		 2423/*
2424 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2425 * fields corresponding to attributes that were used to store the verifier.
2426 * Make sure we clobber those fields in the later setattr call
2427 */
5334c5bd
KM		 2428static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2429 struct iattr *sattr, struct nfs4_label **label)
aa53ed54 2430{
5334c5bd
KM		 2431 const u32 *attrset = opendata->o_res.attrset;
2432
2433 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
aa53ed54
JL		 2434 !(sattr->ia_valid & ATTR_ATIME_SET))
2435 sattr->ia_valid |= ATTR_ATIME;
2436
5334c5bd 2437 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
aa53ed54
JL		 2438 !(sattr->ia_valid & ATTR_MTIME_SET))
2439 sattr->ia_valid |= ATTR_MTIME;
5334c5bd
KM		 2440
2441 /* Except MODE, it seems harmless of setting twice. */
2442 if ((attrset[1] & FATTR4_WORD1_MODE))
2443 sattr->ia_valid &= ~ATTR_MODE;
2444
2445 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2446 *label = NULL;
aa53ed54
JL		 2447}
2448
c21443c2
TM		 2449static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2450 fmode_t fmode,
2451 int flags,
3efb9722 2452 struct nfs_open_context *ctx)
c21443c2
TM		 2453{
2454 struct nfs4_state_owner *sp = opendata->owner;
2455 struct nfs_server *server = sp->so_server;
275bb307 2456 struct dentry *dentry;
c21443c2
TM		 2457 struct nfs4_state *state;
2458 unsigned int seq;
2459 int ret;
2460
2461 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2462
2463 ret = _nfs4_proc_open(opendata);
dca78001 2464 if (ret != 0)
c21443c2
TM		 2465 goto out;
2466
2467 state = nfs4_opendata_to_nfs4_state(opendata);
2468 ret = PTR_ERR(state);
2469 if (IS_ERR(state))
2470 goto out;
2471 if (server->caps & NFS_CAP_POSIX_LOCK)
2472 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2473
275bb307 2474 dentry = opendata->dentry;
2b0143b5 2475 if (d_really_is_negative(dentry)) {
668d0cd5 2476 struct dentry *alias;
275bb307 2477 d_drop(dentry);
668d0cd5
AV		 2478 alias = d_exact_alias(dentry, state->inode);
2479 if (!alias)
2480 alias = d_splice_alias(igrab(state->inode), dentry);
2481 /* d_splice_alias() can't fail here - it's a non-directory */
2482 if (alias) {
275bb307 2483 dput(ctx->dentry);
668d0cd5 2484 ctx->dentry = dentry = alias;
275bb307
TM		 2485 }
2486 nfs_set_verifier(dentry,
2b0143b5 2487 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2488 }
2489
c21443c2
TM		 2490 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2491 if (ret != 0)
2492 goto out;
2493
3efb9722 2494 ctx->state = state;
2b0143b5 2495 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2496 nfs_inode_attach_open_context(ctx);
2497 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2498 nfs4_schedule_stateid_recovery(server, state);
2499 }
c21443c2
TM		 2500out:
2501 return ret;
2502}
2503
1da177e4 2504/*
24ac23ab 2505 * Returns a referenced nfs4_state
1da177e4 2506 */
82be417a 2507static int _nfs4_do_open(struct inode *dir,
4197a055 2508 struct nfs_open_context *ctx,
82be417a
AA		 2509 int flags,
2510 struct iattr *sattr,
5bc2afc2
TM		 2511 struct nfs4_label *label,
2512 int *opened)
1da177e4
LT		 2513{
2514 struct nfs4_state_owner *sp;
2515 struct nfs4_state *state = NULL;
2516 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2517 struct nfs4_opendata *opendata;
4197a055
TM		 2518 struct dentry *dentry = ctx->dentry;
2519 struct rpc_cred *cred = ctx->cred;
2520 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2521 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2522 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2523 struct nfs4_label *olabel = NULL;
aac00a8d 2524 int status;
1da177e4
LT		 2525
2526 /* Protect against reboot recovery conflicts */
1da177e4 2527 status = -ENOMEM;
d1e284d5
TM		 2528 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2529 if (sp == NULL) {
1da177e4
LT		 2530 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2531 goto out_err;
2532 }
58d9714a
TM		 2533 status = nfs4_recover_expired_lease(server);
2534 if (status != 0)
b4454fe1 2535 goto err_put_state_owner;
2b0143b5
DH		 2536 if (d_really_is_positive(dentry))
2537 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2538 status = -ENOMEM;
2b0143b5 2539 if (d_really_is_positive(dentry))
49f9a0fa 2540 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2541 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2542 label, claim, GFP_KERNEL);
e56e0b78 2543 if (opendata == NULL)
95d35cb4 2544 goto err_put_state_owner;
1da177e4 2545
14c43f76
DQ		 2546 if (label) {
2547 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2548 if (IS_ERR(olabel)) {
2549 status = PTR_ERR(olabel);
2550 goto err_opendata_put;
2551 }
2552 }
2553
e911b815
TM		 2554 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2555 if (!opendata->f_attr.mdsthreshold) {
2556 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2557 if (!opendata->f_attr.mdsthreshold)
2558 goto err_free_label;
2559 }
1549210f 2560 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2561 }
2b0143b5
DH		 2562 if (d_really_is_positive(dentry))
2563 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2564
3efb9722 2565 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2566 if (status != 0)
14c43f76 2567 goto err_free_label;
3efb9722 2568 state = ctx->state;
6168f62c 2569
efcbc04e 2570 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 2571 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
5334c5bd 2572 nfs4_exclusive_attrset(opendata, sattr, &label);
a1d1c4f1
TM		 2573 /*
2574 * send create attributes which was not set by open
2575 * with an extra setattr.
2576 */
2577 if (sattr->ia_valid & NFS4_VALID_ATTRS) {
2578 nfs_fattr_init(opendata->o_res.f_attr);
2579 status = nfs4_do_setattr(state->inode, cred,
2580 opendata->o_res.f_attr, sattr,
2581 state, label, olabel);
2582 if (status == 0) {
2583 nfs_setattr_update_inode(state->inode, sattr,
2584 opendata->o_res.f_attr);
2585 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
2586 }
1775fd3e 2587 }
0ab64e0e 2588 }
c5c3fb5f 2589 if (opened && opendata->file_created)
5bc2afc2 2590 *opened |= FILE_CREATED;
82be417a 2591
e911b815 2592 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2593 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2594 opendata->f_attr.mdsthreshold = NULL;
2595 }
82be417a 2596
14c43f76
DQ		 2597 nfs4_label_free(olabel);
2598
c6d00e63 2599 nfs4_opendata_put(opendata);
1da177e4 2600 nfs4_put_state_owner(sp);
1da177e4 2601 return 0;
14c43f76
DQ		 2602err_free_label:
2603 nfs4_label_free(olabel);
c6d00e63
TM		 2604err_opendata_put:
2605 nfs4_opendata_put(opendata);
e56e0b78
TM		 2606err_put_state_owner:
2607 nfs4_put_state_owner(sp);
1da177e4 2608out_err:
1da177e4
LT		 2609 return status;
2610}
2611
2612
82be417a 2613static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2614 struct nfs_open_context *ctx,
82be417a
AA		 2615 int flags,
2616 struct iattr *sattr,
5bc2afc2
TM		 2617 struct nfs4_label *label,
2618 int *opened)
1da177e4 2619{
49f9a0fa 2620 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2621 struct nfs4_exception exception = { };
2622 struct nfs4_state *res;
2623 int status;
2624
2625 do {
5bc2afc2 2626 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2627 res = ctx->state;
42113a75 2628 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2629 if (status == 0)
2630 break;
2631 /* NOTE: BAD_SEQID means the server and client disagree about the
2632 * book-keeping w.r.t. state-changing operations
2633 * (OPEN/CLOSE/LOCK/LOCKU...)
2634 * It is actually a sign of a bug on the client or on the server.
2635 *
2636 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2637 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2638 * have unhashed the old state_owner for us, and that we can
2639 * therefore safely retry using a new one. We should still warn
2640 * the user though...
2641 */
2642 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2643 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2644 " returned a bad sequence-id error!\n",
2645 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2646 exception.retry = 1;
2647 continue;
2648 }
550f5747
TM		 2649 /*
2650 * BAD_STATEID on OPEN means that the server cancelled our
2651 * state before it received the OPEN_CONFIRM.
2652 * Recover by retrying the request as per the discussion
2653 * on Page 181 of RFC3530.
2654 */
2655 if (status == -NFS4ERR_BAD_STATEID) {
2656 exception.retry = 1;
2657 continue;
2658 }
aac00a8d
TM		 2659 if (status == -EAGAIN) {
2660 /* We must have found a delegation */
2661 exception.retry = 1;
2662 continue;
2663 }
49f9a0fa
TM		 2664 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2665 continue;
2666 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2667 status, &exception));
2668 } while (exception.retry);
2669 return res;
2670}
2671
659bfcd6
TM		 2672static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2673 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2674 struct nfs4_state *state, struct nfs4_label *ilabel,
2675 struct nfs4_label *olabel)
1da177e4 2676{
3e4f6290 2677 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2678 struct nfs_setattrargs arg = {
3e4f6290 2679 .fh = NFS_FH(inode),
1da177e4
LT		 2680 .iap = sattr,
2681 .server = server,
2682 .bitmask = server->attr_bitmask,
1775fd3e 2683 .label = ilabel,
1da177e4
LT		 2684 };
2685 struct nfs_setattrres res = {
2686 .fattr = fattr,
1775fd3e 2687 .label = olabel,
1da177e4
LT		 2688 .server = server,
2689 };
2690 struct rpc_message msg = {
659bfcd6
TM		 2691 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2692 .rpc_argp = &arg,
2693 .rpc_resp = &res,
2694 .rpc_cred = cred,
1da177e4 2695 };
abf4e13c 2696 struct rpc_cred *delegation_cred = NULL;
26e976a8 2697 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2698 fmode_t fmode;
2699 bool truncate;
65e4308d 2700 int status;
1da177e4 2701
aa9c2669
DQ		 2702 arg.bitmask = nfs4_bitmask(server, ilabel);
2703 if (ilabel)
2704 arg.bitmask = nfs4_bitmask(server, olabel);
2705
0e574af1 2706 nfs_fattr_init(fattr);
1da177e4 2707
ee3ae84e
TM		 2708 /* Servers should only apply open mode checks for file size changes */
2709 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2710 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2711
abf4e13c 2712 if (nfs4_copy_delegation_stateid(inode, fmode, &arg.stateid, &delegation_cred)) {
ee3ae84e 2713 /* Use that stateid */
0418dae1 2714 } else if (truncate && state != NULL) {
2a369153
TM		 2715 struct nfs_lockowner lockowner = {
2716 .l_owner = current->files,
2717 .l_pid = current->tgid,
2718 };
0418dae1
TM		 2719 if (!nfs4_valid_open_stateid(state))
2720 return -EBADF;
abf4e13c
TM		 2721 if (nfs4_select_rw_stateid(state, FMODE_WRITE, &lockowner,
2722 &arg.stateid, &delegation_cred) == -EIO)
0418dae1 2723 return -EBADF;
08e9eac4 2724 } else
f597c537 2725 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
abf4e13c
TM		 2726 if (delegation_cred)
2727 msg.rpc_cred = delegation_cred;
1da177e4 2728
7c513058 2729 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
abf4e13c
TM		 2730
2731 put_rpccred(delegation_cred);
26e976a8
TM		 2732 if (status == 0 && state != NULL)
2733 renew_lease(server, timestamp);
48c9579a 2734 trace_nfs4_setattr(inode, &arg.stateid, status);
65e4308d 2735 return status;
1da177e4
LT		 2736}
2737
659bfcd6
TM		 2738static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2739 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2740 struct nfs4_state *state, struct nfs4_label *ilabel,
2741 struct nfs4_label *olabel)
1da177e4 2742{
3e4f6290 2743 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2744 struct nfs4_exception exception = {
2745 .state = state,
3114ea7a 2746 .inode = inode,
a1d0b5ee 2747 };
1da177e4
LT		 2748 int err;
2749 do {
1775fd3e 2750 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
451146be
TM		 2751 switch (err) {
2752 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2753 if (!(sattr->ia_valid & ATTR_SIZE)) {
2754 pr_warn_once("NFSv4: server %s is incorrectly "
2755 "applying open mode checks to "
2756 "a SETATTR that is not "
2757 "changing file size.\n",
2758 server->nfs_client->cl_hostname);
2759 }
451146be
TM		 2760 if (state && !(state->state & FMODE_WRITE)) {
2761 err = -EBADF;
2762 if (sattr->ia_valid & ATTR_OPEN)
2763 err = -EACCES;
2764 goto out;
2765 }
2766 }
2767 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2768 } while (exception.retry);
451146be 2769out:
1da177e4
LT		 2770 return err;
2771}
2772
500d701f
PT		 2773static bool
2774nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
2775{
2776 if (inode == NULL || !nfs_have_layout(inode))
2777 return false;
2778
2779 return pnfs_wait_on_layoutreturn(inode, task);
2780}
2781
1da177e4
LT		 2782struct nfs4_closedata {
2783 struct inode *inode;
2784 struct nfs4_state *state;
2785 struct nfs_closeargs arg;
2786 struct nfs_closeres res;
516a6af6 2787 struct nfs_fattr fattr;
26e976a8 2788 unsigned long timestamp;
f7e8917a
FI		 2789 bool roc;
2790 u32 roc_barrier;
1da177e4
LT		 2791};
2792
963d8fe5 2793static void nfs4_free_closedata(void *data)
9512135d 2794{
963d8fe5
TM		 2795 struct nfs4_closedata *calldata = data;
2796 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2797 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2798
f7e8917a
FI		 2799 if (calldata->roc)
2800 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2801 nfs4_put_open_state(calldata->state);
2802 nfs_free_seqid(calldata->arg.seqid);
9512135d 2803 nfs4_put_state_owner(sp);
322b2b90 2804 nfs_sb_deactive(sb);
9512135d
TM		 2805 kfree(calldata);
2806}
2807
963d8fe5 2808static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2809{
963d8fe5 2810 struct nfs4_closedata *calldata = data;
1da177e4 2811 struct nfs4_state *state = calldata->state;
1da177e4 2812 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2813 nfs4_stateid *res_stateid = NULL;
1da177e4 2814
a3ca5651 2815 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2816 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2817 return;
42113a75 2818 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2819 /* hmm. we are done with the inode, and in the process of freeing
2820 * the state_owner. we keep this around to process errors
2821 */
1da177e4
LT		 2822 switch (task->tk_status) {
2823 case 0:
412f6c4c 2824 res_stateid = &calldata->res.stateid;
3c13cb5b 2825 if (calldata->roc)
f7e8917a
FI		 2826 pnfs_roc_set_barrier(state->inode,
2827 calldata->roc_barrier);
26e976a8 2828 renew_lease(server, calldata->timestamp);
412f6c4c 2829 break;
69794ad7 2830 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2831 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2832 case -NFS4ERR_OLD_STATEID:
2833 case -NFS4ERR_BAD_STATEID:
1da177e4 2834 case -NFS4ERR_EXPIRED:
566fcec6 2835 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 2836 &state->open_stateid)) {
566fcec6
TM		 2837 rpc_restart_call_prepare(task);
2838 goto out_release;
2839 }
dc0b027d 2840 if (calldata->arg.fmode == 0)
9e33bed5 2841 break;
1da177e4 2842 default:
8478eaa1 2843 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 2844 rpc_restart_call_prepare(task);
69794ad7
TM		 2845 goto out_release;
2846 }
1da177e4 2847 }
4a1e2feb
TM		 2848 nfs_clear_open_stateid(state, &calldata->arg.stateid,
2849 res_stateid, calldata->arg.fmode);
69794ad7 2850out_release:
72211dbe 2851 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2852 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2853 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2854}
2855
4ce70ada 2856static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2857{
4ce70ada 2858 struct nfs4_closedata *calldata = data;
9512135d 2859 struct nfs4_state *state = calldata->state;
7fdab069 2860 struct inode *inode = calldata->inode;
aee7af35 2861 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2862 int call_close = 0;
9512135d 2863
a3ca5651 2864 dprintk("%s: begin!\n", __func__);
963d8fe5 2865 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2866 goto out_wait;
003707c7 2867
88069f77 2868 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2869 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2870 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2871 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2872 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 2873 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 2874 /* Calculate the change in open mode */
cd9288ff 2875 calldata->arg.fmode = 0;
e7616923 2876 if (state->n_rdwr == 0) {
cd9288ff
TM		 2877 if (state->n_rdonly == 0)
2878 call_close |= is_rdonly;
2879 else if (is_rdonly)
2880 calldata->arg.fmode |= FMODE_READ;
2881 if (state->n_wronly == 0)
2882 call_close |= is_wronly;
2883 else if (is_wronly)
2884 calldata->arg.fmode |= FMODE_WRITE;
e547f262
TM		 2885 if (calldata->arg.fmode != (FMODE_READ|FMODE_WRITE))
2886 call_close |= is_rdwr;
cd9288ff
TM		 2887 } else if (is_rdwr)
2888 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2889
5d422301
TM		 2890 if (!nfs4_valid_open_stateid(state))
2891 call_close = 0;
4cecb76f 2892 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2893
2894 if (!call_close) {
963d8fe5 2895 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2896 goto out_no_action;
9512135d 2897 }
88069f77 2898
500d701f
PT		 2899 if (nfs4_wait_on_layoutreturn(inode, task)) {
2900 nfs_release_seqid(calldata->arg.seqid);
2901 goto out_wait;
2902 }
2903
3c13cb5b 2904 if (calldata->arg.fmode == 0)
88069f77 2905 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3c13cb5b
TM		 2906 if (calldata->roc)
2907 pnfs_roc_get_barrier(inode, &calldata->roc_barrier);
2908
6ae37339
TM		 2909 calldata->arg.share_access =
2910 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2911 calldata->arg.fmode, 0);
88069f77 2912
516a6af6 2913 nfs_fattr_init(calldata->res.fattr);
26e976a8 2914 calldata->timestamp = jiffies;
7fdab069 2915 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2916 &calldata->arg.seq_args,
2917 &calldata->res.seq_res,
2240a9e2
TM		 2918 task) != 0)
2919 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2920 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2921 return;
2922out_no_action:
2923 task->tk_action = NULL;
2924out_wait:
2925 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2926}
2927
963d8fe5 2928static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2929 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2930 .rpc_call_done = nfs4_close_done,
2931 .rpc_release = nfs4_free_closedata,
2932};
2933
fe08c546
PT		 2934static bool nfs4_roc(struct inode *inode)
2935{
40dd4b7a 2936 if (!nfs_have_layout(inode))
fe08c546 2937 return false;
fe08c546
PT		 2938 return pnfs_roc(inode);
2939}
2940
1da177e4
LT		 2941/*
2942 * It is possible for data to be read/written from a mem-mapped file
2943 * after the sys_close call (which hits the vfs layer as a flush).
2944 * This means that we can't safely call nfsv4 close on a file until
2945 * the inode is cleared. This in turn means that we are not good
2946 * NFSv4 citizens - we do not indicate to the server to update the file's
2947 * share state even when we are done with one of the three share
2948 * stateid's in the inode.
2949 *
2950 * NOTE: Caller must be holding the sp->so_owner semaphore!
2951 */
1f7977c1 2952int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2953{
4a35bd41 2954 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 2955 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 2956 struct nfs4_closedata *calldata;
b39e625b
TM		 2957 struct nfs4_state_owner *sp = state->owner;
2958 struct rpc_task *task;
5138fde0
TM		 2959 struct rpc_message msg = {
2960 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2961 .rpc_cred = state->owner->so_cred,
2962 };
c970aa85
TM		 2963 struct rpc_task_setup task_setup_data = {
2964 .rpc_client = server->client,
5138fde0 2965 .rpc_message = &msg,
c970aa85 2966 .callback_ops = &nfs4_close_ops,
101070ca 2967 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2968 .flags = RPC_TASK_ASYNC,
2969 };
9512135d 2970 int status = -ENOMEM;
1da177e4 2971
fa940720
WAA		 2972 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2973 &task_setup_data.rpc_client, &msg);
2974
8535b2be 2975 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2976 if (calldata == NULL)
9512135d 2977 goto out;
a9c92d6b 2978 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2979 calldata->inode = state->inode;
1da177e4 2980 calldata->state = state;
4a35bd41 2981 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 2982 /* Serialization for the sequence id */
63f5f796
TM		 2983 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2984 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 2985 if (IS_ERR(calldata->arg.seqid))
9512135d 2986 goto out_free_calldata;
dc0b027d 2987 calldata->arg.fmode = 0;
a65318bf 2988 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2989 calldata->res.fattr = &calldata->fattr;
c1d51931 2990 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2991 calldata->res.server = server;
fe08c546 2992 calldata->roc = nfs4_roc(state->inode);
643168c2 2993 nfs_sb_active(calldata->inode->i_sb);
9512135d 2994
1174dd1f
TM		 2995 msg.rpc_argp = &calldata->arg;
2996 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2997 task_setup_data.callback_data = calldata;
2998 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2999 if (IS_ERR(task))
3000 return PTR_ERR(task);
a49c3c77
TM		 3001 status = 0;
3002 if (wait)
3003 status = rpc_wait_for_completion_task(task);
b39e625b 3004 rpc_put_task(task);
a49c3c77 3005 return status;
9512135d
TM		 3006out_free_calldata:
3007 kfree(calldata);
3008out:
b39e625b
TM		 3009 nfs4_put_open_state(state);
3010 nfs4_put_state_owner(sp);
9512135d 3011 return status;
1da177e4
LT		 3012}
3013
2b484297 3014static struct inode *
5bc2afc2
TM		 3015nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3016 int open_flags, struct iattr *attr, int *opened)
1da177e4 3017{
1da177e4 3018 struct nfs4_state *state;
aa9c2669
DQ		 3019 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3020
3021 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 3022
565277f6 3023 /* Protect against concurrent sillydeletes */
5bc2afc2 3024 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 3025
3026 nfs4_label_release_security(label);
3027
f46e0bd3
TM		 3028 if (IS_ERR(state))
3029 return ERR_CAST(state);
275bb307 3030 return state->inode;
1da177e4
LT		 3031}
3032
1185a552 3033static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 3034{
3035 if (ctx->state == NULL)
3036 return;
3037 if (is_sync)
643168c2 3038 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 3039 else
643168c2 3040 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 3041}
1da177e4 3042
b944dba3
TM		 3043#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3044#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 3045#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 3046
1da177e4
LT		 3047static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3048{
8c61282f 3049 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 3050 struct nfs4_server_caps_arg args = {
3051 .fhandle = fhandle,
8c61282f 3052 .bitmask = bitmask,
43652ad5 3053 };
1da177e4
LT		 3054 struct nfs4_server_caps_res res = {};
3055 struct rpc_message msg = {
3056 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 3057 .rpc_argp = &args,
1da177e4
LT		 3058 .rpc_resp = &res,
3059 };
3060 int status;
3061
8c61282f
KM		 3062 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3063 FATTR4_WORD0_FH_EXPIRE_TYPE |
3064 FATTR4_WORD0_LINK_SUPPORT |
3065 FATTR4_WORD0_SYMLINK_SUPPORT |
3066 FATTR4_WORD0_ACLSUPPORT;
3067 if (minorversion)
3068 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3069
7c513058 3070 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3071 if (status == 0) {
b944dba3 3072 /* Sanity check the server answers */
8c61282f 3073 switch (minorversion) {
b944dba3
TM		 3074 case 0:
3075 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3076 res.attr_bitmask[2] = 0;
3077 break;
3078 case 1:
3079 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3080 break;
3081 case 2:
3082 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3083 }
1da177e4 3084 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 3085 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3086 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3087 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3088 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 3089 NFS_CAP_CTIME|NFS_CAP_MTIME|
3090 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 3091 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3092 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 3093 server->caps |= NFS_CAP_ACLS;
3094 if (res.has_links != 0)
3095 server->caps |= NFS_CAP_HARDLINKS;
3096 if (res.has_symlinks != 0)
3097 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 3098 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3099 server->caps |= NFS_CAP_FILEID;
3100 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3101 server->caps |= NFS_CAP_MODE;
3102 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3103 server->caps |= NFS_CAP_NLINK;
3104 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3105 server->caps |= NFS_CAP_OWNER;
3106 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3107 server->caps |= NFS_CAP_OWNER_GROUP;
3108 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3109 server->caps |= NFS_CAP_ATIME;
3110 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3111 server->caps |= NFS_CAP_CTIME;
3112 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3113 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 3114#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3115 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3116 server->caps |= NFS_CAP_SECURITY_LABEL;
3117#endif
3118 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3119 sizeof(server->attr_bitmask));
b944dba3 3120 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 3121
a65318bf
TM		 3122 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3123 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3124 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 3125 server->cache_consistency_bitmask[2] = 0;
8c61282f
KM		 3126 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3127 sizeof(server->exclcreat_bitmask));
1da177e4 3128 server->acl_bitmask = res.acl_bitmask;
264e6351 3129 server->fh_expire_type = res.fh_expire_type;
1da177e4 3130 }
cccef3b9 3131
1da177e4
LT		 3132 return status;
3133}
3134
55a97593 3135int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 3136{
3137 struct nfs4_exception exception = { };
3138 int err;
3139 do {
3140 err = nfs4_handle_exception(server,
3141 _nfs4_server_capabilities(server, fhandle),
3142 &exception);
3143 } while (exception.retry);
3144 return err;
3145}
3146
3147static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3148 struct nfs_fsinfo *info)
3149{
aa9c2669 3150 u32 bitmask[3];
1da177e4 3151 struct nfs4_lookup_root_arg args = {
aa9c2669 3152 .bitmask = bitmask,
1da177e4
LT		 3153 };
3154 struct nfs4_lookup_res res = {
3155 .server = server,
0e574af1 3156 .fattr = info->fattr,
1da177e4
LT		 3157 .fh = fhandle,
3158 };
3159 struct rpc_message msg = {
3160 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3161 .rpc_argp = &args,
3162 .rpc_resp = &res,
3163 };
008f55d0 3164
aa9c2669
DQ		 3165 bitmask[0] = nfs4_fattr_bitmap[0];
3166 bitmask[1] = nfs4_fattr_bitmap[1];
3167 /*
3168 * Process the label in the upcoming getfattr
3169 */
3170 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3171
0e574af1 3172 nfs_fattr_init(info->fattr);
7c513058 3173 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3174}
3175
3176static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3177 struct nfs_fsinfo *info)
3178{
3179 struct nfs4_exception exception = { };
3180 int err;
3181 do {
fb8a5ba8 3182 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3183 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3184 switch (err) {
3185 case 0:
3186 case -NFS4ERR_WRONGSEC:
05e9cfb4 3187 goto out;
fb8a5ba8
BS		 3188 default:
3189 err = nfs4_handle_exception(server, err, &exception);
3190 }
1da177e4 3191 } while (exception.retry);
05e9cfb4 3192out:
1da177e4
LT		 3193 return err;
3194}
3195
8f70e95f
BS		 3196static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3197 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3198{
c2190661
TM		 3199 struct rpc_auth_create_args auth_args = {
3200 .pseudoflavor = flavor,
3201 };
8f70e95f
BS		 3202 struct rpc_auth *auth;
3203 int ret;
3204
c2190661 3205 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3206 if (IS_ERR(auth)) {
75bc8821 3207 ret = -EACCES;
8f70e95f
BS		 3208 goto out;
3209 }
3210 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3211out:
3212 return ret;
3213}
3214
9a744ba3
CL		 3215/*
3216 * Retry pseudoroot lookup with various security flavors. We do this when:
3217 *
3218 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3219 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3220 *
3221 * Returns zero on success, or a negative NFS4ERR value, or a
3222 * negative errno value.
3223 */
801a16dc 3224static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3225 struct nfs_fsinfo *info)
1da177e4 3226{
9a744ba3
CL		 3227 /* Per 3530bis 15.33.5 */
3228 static const rpc_authflavor_t flav_array[] = {
3229 RPC_AUTH_GSS_KRB5P,
3230 RPC_AUTH_GSS_KRB5I,
3231 RPC_AUTH_GSS_KRB5,
c4eafe11 3232 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3233 RPC_AUTH_NULL,
3234 };
3235 int status = -EPERM;
3236 size_t i;
6a1a1e34 3237
4d4b69dd
WAA		 3238 if (server->auth_info.flavor_len > 0) {
3239 /* try each flavor specified by user */
3240 for (i = 0; i < server->auth_info.flavor_len; i++) {
3241 status = nfs4_lookup_root_sec(server, fhandle, info,
3242 server->auth_info.flavors[i]);
3243 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3244 continue;
3245 break;
3246 }
3247 } else {
3248 /* no flavors specified by user, try default list */
3249 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3250 status = nfs4_lookup_root_sec(server, fhandle, info,
3251 flav_array[i]);
3252 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3253 continue;
3254 break;
3255 }
8f70e95f 3256 }
9a744ba3 3257
fb8a5ba8
BS		 3258 /*
3259 * -EACCESS could mean that the user doesn't have correct permissions
3260 * to access the mount. It could also mean that we tried to mount
3261 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3262 * existing mount programs don't handle -EACCES very well so it should
3263 * be mapped to -EPERM instead.
3264 */
3265 if (status == -EACCES)
3266 status = -EPERM;
801a16dc
BS		 3267 return status;
3268}
3269
2ed4b95b
CL		 3270static int nfs4_do_find_root_sec(struct nfs_server *server,
3271 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3272{
3273 int mv = server->nfs_client->cl_minorversion;
3274 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3275}
3276
3277/**
3278 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3279 * @server: initialized nfs_server handle
3280 * @fhandle: we fill in the pseudo-fs root file handle
3281 * @info: we fill in an FSINFO struct
5e6b1990 3282 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3283 *
3284 * Returns zero on success, or a negative errno.
801a16dc 3285 */
3028eb2b 3286int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3287 struct nfs_fsinfo *info,
3288 bool auth_probe)
801a16dc 3289{
c7757074 3290 int status = 0;
2ed4b95b 3291
c7757074 3292 if (!auth_probe)
5e6b1990 3293 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3294
3295 if (auth_probe || status == NFS4ERR_WRONGSEC)
2ed4b95b
CL		 3296 status = nfs4_do_find_root_sec(server, fhandle, info);
3297
1da177e4
LT		 3298 if (status == 0)
3299 status = nfs4_server_capabilities(server, fhandle);
3300 if (status == 0)
3301 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3302
c12e87f4 3303 return nfs4_map_errors(status);
1da177e4
LT		 3304}
3305
bae36241
BS		 3306static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3307 struct nfs_fsinfo *info)
3308{
3309 int error;
3310 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3311 struct nfs4_label *label = NULL;
bae36241
BS		 3312
3313 error = nfs4_server_capabilities(server, mntfh);
3314 if (error < 0) {
3315 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3316 return error;
3317 }
3318
14c43f76
DQ		 3319 label = nfs4_label_alloc(server, GFP_KERNEL);
3320 if (IS_ERR(label))
3321 return PTR_ERR(label);
3322
1775fd3e 3323 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3324 if (error < 0) {
3325 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3326 goto err_free_label;
bae36241
BS		 3327 }
3328
3329 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3330 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3331 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3332
14c43f76
DQ		 3333err_free_label:
3334 nfs4_label_free(label);
3335
bae36241
BS		 3336 return error;
3337}
3338
6b97fd3d
MN		 3339/*
3340 * Get locations and (maybe) other attributes of a referral.
3341 * Note that we'll actually follow the referral later when
3342 * we detect fsid mismatch in inode revalidation
3343 */
f05d147f
BS		 3344static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3345 const struct qstr *name, struct nfs_fattr *fattr,
3346 struct nfs_fh *fhandle)
6b97fd3d
MN		 3347{
3348 int status = -ENOMEM;
3349 struct page *page = NULL;
3350 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3351
3352 page = alloc_page(GFP_KERNEL);
3353 if (page == NULL)
3354 goto out;
3355 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3356 if (locations == NULL)
3357 goto out;
3358
f05d147f 3359 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3360 if (status != 0)
3361 goto out;
519ae255
CL		 3362
3363 /*
3364 * If the fsid didn't change, this is a migration event, not a
3365 * referral. Cause us to drop into the exception handler, which
3366 * will kick off migration recovery.
3367 */
6b97fd3d 3368 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3369 dprintk("%s: server did not return a different fsid for"
3370 " a referral at %s\n", __func__, name->name);
519ae255 3371 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3372 goto out;
3373 }
533eb461
AA		 3374 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3375 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3376
533eb461 3377 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3378 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3379 memset(fhandle, 0, sizeof(struct nfs_fh));
3380out:
3381 if (page)
3382 __free_page(page);
5d7ca35a 3383 kfree(locations);
6b97fd3d
MN		 3384 return status;
3385}
3386
1775fd3e
DQ		 3387static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3388 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3389{
3390 struct nfs4_getattr_arg args = {
3391 .fh = fhandle,
3392 .bitmask = server->attr_bitmask,
3393 };
3394 struct nfs4_getattr_res res = {
3395 .fattr = fattr,
1775fd3e 3396 .label = label,
1da177e4
LT		 3397 .server = server,
3398 };
3399 struct rpc_message msg = {
3400 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3401 .rpc_argp = &args,
3402 .rpc_resp = &res,
3403 };
aa9c2669
DQ		 3404
3405 args.bitmask = nfs4_bitmask(server, label);
3406
0e574af1 3407 nfs_fattr_init(fattr);
7c513058 3408 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3409}
3410
1775fd3e
DQ		 3411static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3412 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3413{
3414 struct nfs4_exception exception = { };
3415 int err;
3416 do {
b5f875a9
TM		 3417 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3418 trace_nfs4_getattr(server, fhandle, fattr, err);
3419 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3420 &exception);
3421 } while (exception.retry);
3422 return err;
3423}
3424
3425/*
3426 * The file is not closed if it is opened due to the a request to change
3427 * the size of the file. The open call will not be needed once the
3428 * VFS layer lookup-intents are implemented.
3429 *
3430 * Close is called when the inode is destroyed.
3431 * If we haven't opened the file for O_WRONLY, we
3432 * need to in the size_change case to obtain a stateid.
3433 *
3434 * Got race?
3435 * Because OPEN is always done by name in nfsv4, it is
3436 * possible that we opened a different file by the same
3437 * name. We can recognize this race condition, but we
3438 * can't do anything about it besides returning an error.
3439 *
3440 * This will be fixed with VFS changes (lookup-intent).
3441 */
3442static int
3443nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3444 struct iattr *sattr)
3445{
2b0143b5 3446 struct inode *inode = d_inode(dentry);
659bfcd6 3447 struct rpc_cred *cred = NULL;
d530838b 3448 struct nfs4_state *state = NULL;
14c43f76 3449 struct nfs4_label *label = NULL;
1da177e4
LT		 3450 int status;
3451
88ac815c
PT		 3452 if (pnfs_ld_layoutret_on_setattr(inode) &&
3453 sattr->ia_valid & ATTR_SIZE &&
3454 sattr->ia_size < i_size_read(inode))
24028672 3455 pnfs_commit_and_return_layout(inode);
8a1636c4 3456
0e574af1 3457 nfs_fattr_init(fattr);
1da177e4 3458
2669940d
AA		 3459 /* Deal with open(O_TRUNC) */
3460 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3461 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3462
3463 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3464 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3465 return 0;
3466
d530838b 3467 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3468 if (sattr->ia_valid & ATTR_FILE) {
3469 struct nfs_open_context *ctx;
3470
3471 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3472 if (ctx) {
3473 cred = ctx->cred;
3474 state = ctx->state;
3475 }
659bfcd6 3476 }
08e9eac4 3477
14c43f76
DQ		 3478 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3479 if (IS_ERR(label))
3480 return PTR_ERR(label);
3481
3482 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3483 if (status == 0) {
f044636d 3484 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3485 nfs_setsecurity(inode, fattr, label);
3486 }
14c43f76 3487 nfs4_label_free(label);
1da177e4
LT		 3488 return status;
3489}
3490
0c2e53f1
TM		 3491static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3492 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3493 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3494{
0c2e53f1 3495 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3496 int status;
3497 struct nfs4_lookup_arg args = {
3498 .bitmask = server->attr_bitmask,
0c2e53f1 3499 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3500 .name = name,
3501 };
3502 struct nfs4_lookup_res res = {
3503 .server = server,
3504 .fattr = fattr,
aa9c2669 3505 .label = label,
2b3de441
DH		 3506 .fh = fhandle,
3507 };
3508 struct rpc_message msg = {
3509 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3510 .rpc_argp = &args,
3511 .rpc_resp = &res,
3512 };
3513
aa9c2669
DQ		 3514 args.bitmask = nfs4_bitmask(server, label);
3515
2b3de441
DH		 3516 nfs_fattr_init(fattr);
3517
1da177e4 3518 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3519 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3520 dprintk("NFS reply lookup: %d\n", status);
3521 return status;
3522}
3523
72de53ec 3524static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3525{
7ebb9315 3526 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3527 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3528 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3529 fattr->nlink = 2;
3530}
3531
72de53ec
BS		 3532static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3533 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3534 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3535{
3536 struct nfs4_exception exception = { };
72de53ec 3537 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3538 int err;
3539 do {
1775fd3e 3540 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3541 trace_nfs4_lookup(dir, name, err);
72de53ec 3542 switch (err) {
08ef7bd3 3543 case -NFS4ERR_BADNAME:
72de53ec
BS		 3544 err = -ENOENT;
3545 goto out;
0c2e53f1 3546 case -NFS4ERR_MOVED:
f05d147f 3547 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3548 if (err == -NFS4ERR_MOVED)
3549 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3550 goto out;
0c2e53f1 3551 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3552 err = -EPERM;
3553 if (client != *clnt)
3554 goto out;
66b06860 3555 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3556 if (IS_ERR(client))
3557 return PTR_ERR(client);
3558
3559 exception.retry = 1;
3560 break;
3561 default:
3562 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3563 }
1da177e4 3564 } while (exception.retry);
72de53ec
BS		 3565
3566out:
3567 if (err == 0)
3568 *clnt = client;
3569 else if (client != *clnt)
3570 rpc_shutdown_client(client);
3571
1da177e4
LT		 3572 return err;
3573}
3574
80a16b21 3575static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3576 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3577 struct nfs4_label *label)
72de53ec
BS		 3578{
3579 int status;
3580 struct rpc_clnt *client = NFS_CLIENT(dir);
3581
1775fd3e 3582 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3583 if (client != NFS_CLIENT(dir)) {
3584 rpc_shutdown_client(client);
3585 nfs_fixup_secinfo_attributes(fattr);
3586 }
3587 return status;
3588}
3589
f05d147f
BS		 3590struct rpc_clnt *
3591nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3592 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3593{
b72888cb 3594 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3595 int status;
f05d147f 3596
1775fd3e 3597 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3598 if (status < 0)
f05d147f 3599 return ERR_PTR(status);
b72888cb 3600 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3601}
3602
1da177e4
LT		 3603static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3604{
76b32999 3605 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3606 struct nfs4_accessargs args = {
3607 .fh = NFS_FH(inode),
a4980e78 3608 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3609 };
3610 struct nfs4_accessres res = {
3611 .server = server,
1da177e4 3612 };
1da177e4
LT		 3613 struct rpc_message msg = {
3614 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3615 .rpc_argp = &args,
3616 .rpc_resp = &res,
3617 .rpc_cred = entry->cred,
3618 };
3619 int mode = entry->mask;
aa9c2669 3620 int status = 0;
1da177e4
LT		 3621
3622 /*
3623 * Determine which access bits we want to ask for...
3624 */
3625 if (mode & MAY_READ)
3626 args.access |= NFS4_ACCESS_READ;
3627 if (S_ISDIR(inode->i_mode)) {
3628 if (mode & MAY_WRITE)
3629 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3630 if (mode & MAY_EXEC)
3631 args.access |= NFS4_ACCESS_LOOKUP;
3632 } else {
3633 if (mode & MAY_WRITE)
3634 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3635 if (mode & MAY_EXEC)
3636 args.access |= NFS4_ACCESS_EXECUTE;
3637 }
c407d41a
TM		 3638
3639 res.fattr = nfs_alloc_fattr();
3640 if (res.fattr == NULL)
3641 return -ENOMEM;
3642
7c513058 3643 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3644 if (!status) {
6168f62c 3645 nfs_access_set_mask(entry, res.access);
c407d41a 3646 nfs_refresh_inode(inode, res.fattr);
1da177e4 3647 }
c407d41a 3648 nfs_free_fattr(res.fattr);
1da177e4
LT		 3649 return status;
3650}
3651
3652static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3653{
3654 struct nfs4_exception exception = { };
3655 int err;
3656 do {
c1578b76
TM		 3657 err = _nfs4_proc_access(inode, entry);
3658 trace_nfs4_access(inode, err);
3659 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3660 &exception);
3661 } while (exception.retry);
3662 return err;
3663}
3664
3665/*
3666 * TODO: For the time being, we don't try to get any attributes
3667 * along with any of the zero-copy operations READ, READDIR,
3668 * READLINK, WRITE.
3669 *
3670 * In the case of the first three, we want to put the GETATTR
3671 * after the read-type operation -- this is because it is hard
3672 * to predict the length of a GETATTR response in v4, and thus
3673 * align the READ data correctly. This means that the GETATTR
3674 * may end up partially falling into the page cache, and we should
3675 * shift it into the 'tail' of the xdr_buf before processing.
3676 * To do this efficiently, we need to know the total length
3677 * of data received, which doesn't seem to be available outside
3678 * of the RPC layer.
3679 *
3680 * In the case of WRITE, we also want to put the GETATTR after
3681 * the operation -- in this case because we want to make sure
140150db 3682 * we get the post-operation mtime and size.
1da177e4
LT		 3683 *
3684 * Both of these changes to the XDR layer would in fact be quite
3685 * minor, but I decided to leave them for a subsequent patch.
3686 */
3687static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3688 unsigned int pgbase, unsigned int pglen)
3689{
3690 struct nfs4_readlink args = {
3691 .fh = NFS_FH(inode),
3692 .pgbase = pgbase,
3693 .pglen = pglen,
3694 .pages = &page,
3695 };
f50c7000 3696 struct nfs4_readlink_res res;
1da177e4
LT		 3697 struct rpc_message msg = {
3698 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3699 .rpc_argp = &args,
f50c7000 3700 .rpc_resp = &res,
1da177e4
LT		 3701 };
3702
7c513058 3703 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3704}
3705
3706static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3707 unsigned int pgbase, unsigned int pglen)
3708{
3709 struct nfs4_exception exception = { };
3710 int err;
3711 do {
c1578b76
TM		 3712 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3713 trace_nfs4_readlink(inode, err);
3714 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3715 &exception);
3716 } while (exception.retry);
3717 return err;
3718}
3719
1da177e4 3720/*
8867fe58 3721 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3722 */
1da177e4
LT		 3723static int
3724nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3725 int flags)
1da177e4 3726{
aa9c2669 3727 struct nfs4_label l, *ilabel = NULL;
8867fe58 3728 struct nfs_open_context *ctx;
1da177e4 3729 struct nfs4_state *state;
1da177e4
LT		 3730 int status = 0;
3731
8867fe58
MS		 3732 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3733 if (IS_ERR(ctx))
3734 return PTR_ERR(ctx);
3735
aa9c2669
DQ		 3736 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3737
a8a5da99 3738 sattr->ia_mode &= ~current_umask();
c5c3fb5f 3739 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 3740 if (IS_ERR(state)) {
3741 status = PTR_ERR(state);
c0204fd2 3742 goto out;
1da177e4 3743 }
1da177e4 3744out:
aa9c2669 3745 nfs4_label_release_security(ilabel);
8867fe58 3746 put_nfs_open_context(ctx);
1da177e4
LT		 3747 return status;
3748}
3749
3750static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3751{
16e42959 3752 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3753 struct nfs_removeargs args = {
1da177e4 3754 .fh = NFS_FH(dir),
26fe5750 3755 .name = *name,
16e42959 3756 };
4fdc17b2 3757 struct nfs_removeres res = {
16e42959 3758 .server = server,
1da177e4 3759 };
1da177e4 3760 struct rpc_message msg = {
4fdc17b2
TM		 3761 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3762 .rpc_argp = &args,
3763 .rpc_resp = &res,
1da177e4 3764 };
778d2817 3765 int status;
1da177e4 3766
7c513058 3767 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3768 if (status == 0)
16e42959 3769 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3770 return status;
3771}
3772
3773static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3774{
3775 struct nfs4_exception exception = { };
3776 int err;
3777 do {
078ea3df
TM		 3778 err = _nfs4_proc_remove(dir, name);
3779 trace_nfs4_remove(dir, name, err);
3780 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3781 &exception);
3782 } while (exception.retry);
3783 return err;
3784}
3785
e4eff1a6 3786static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3787{
e4eff1a6
TM		 3788 struct nfs_server *server = NFS_SERVER(dir);
3789 struct nfs_removeargs *args = msg->rpc_argp;
3790 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3791
e4eff1a6 3792 res->server = server;
1da177e4 3793 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3794 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3795
3796 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3797}
3798
34e137cc
BS		 3799static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3800{
884be175 3801 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb),
d9afbd1b
TM		 3802 &data->args.seq_args,
3803 &data->res.seq_res,
3804 task);
1da177e4
LT		 3805}
3806
e4eff1a6 3807static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3808{
078ea3df
TM		 3809 struct nfs_unlinkdata *data = task->tk_calldata;
3810 struct nfs_removeres *res = &data->res;
e4eff1a6 3811
14516c3a
TM		 3812 if (!nfs4_sequence_done(task, &res->seq_res))
3813 return 0;
8478eaa1
N		 3814 if (nfs4_async_handle_error(task, res->server, NULL,
3815 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3816 return 0;
3817 update_changeattr(dir, &res->cinfo);
e4eff1a6 3818 return 1;
1da177e4
LT		 3819}
3820
d3d4152a
JL		 3821static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3822{
3823 struct nfs_server *server = NFS_SERVER(dir);
3824 struct nfs_renameargs *arg = msg->rpc_argp;
3825 struct nfs_renameres *res = msg->rpc_resp;
3826
3827 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3828 res->server = server;
a9c92d6b 3829 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3830}
3831
c6bfa1a1
BS		 3832static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3833{
d9afbd1b
TM		 3834 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3835 &data->args.seq_args,
3836 &data->res.seq_res,
3837 task);
d3d4152a
JL		 3838}
3839
3840static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3841 struct inode *new_dir)
3842{
fbc6f7c2
TM		 3843 struct nfs_renamedata *data = task->tk_calldata;
3844 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3845
3846 if (!nfs4_sequence_done(task, &res->seq_res))
3847 return 0;
8478eaa1 3848 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3849 return 0;
3850
3851 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3852 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3853 return 1;
3854}
3855
1da177e4
LT		 3856static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3857{
91ba2eee 3858 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3859 struct nfs4_link_arg arg = {
3860 .fh = NFS_FH(inode),
3861 .dir_fh = NFS_FH(dir),
3862 .name = name,
91ba2eee
TM		 3863 .bitmask = server->attr_bitmask,
3864 };
91ba2eee
TM		 3865 struct nfs4_link_res res = {
3866 .server = server,
1775fd3e 3867 .label = NULL,
1da177e4 3868 };
1da177e4
LT		 3869 struct rpc_message msg = {
3870 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3871 .rpc_argp = &arg,
91ba2eee 3872 .rpc_resp = &res,
1da177e4 3873 };
136f2627
TM		 3874 int status = -ENOMEM;
3875
3876 res.fattr = nfs_alloc_fattr();
778d2817 3877 if (res.fattr == NULL)
136f2627 3878 goto out;
1da177e4 3879
14c43f76
DQ		 3880 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3881 if (IS_ERR(res.label)) {
3882 status = PTR_ERR(res.label);
3883 goto out;
3884 }
aa9c2669 3885 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3886
7c513058 3887 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3888 if (!status) {
3889 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3890 status = nfs_post_op_update_inode(inode, res.fattr);
3891 if (!status)
3892 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3893 }
14c43f76
DQ		 3894
3895
3896 nfs4_label_free(res.label);
3897
136f2627 3898out:
136f2627 3899 nfs_free_fattr(res.fattr);
1da177e4
LT		 3900 return status;
3901}
3902
3903static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3904{
3905 struct nfs4_exception exception = { };
3906 int err;
3907 do {
3908 err = nfs4_handle_exception(NFS_SERVER(inode),
3909 _nfs4_proc_link(inode, dir, name),
3910 &exception);
3911 } while (exception.retry);
3912 return err;
3913}
3914
57dc9a57
TM		 3915struct nfs4_createdata {
3916 struct rpc_message msg;
3917 struct nfs4_create_arg arg;
3918 struct nfs4_create_res res;
3919 struct nfs_fh fh;
3920 struct nfs_fattr fattr;
1775fd3e 3921 struct nfs4_label *label;
57dc9a57
TM		 3922};
3923
3924static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3925 struct qstr *name, struct iattr *sattr, u32 ftype)
3926{
3927 struct nfs4_createdata *data;
3928
3929 data = kzalloc(sizeof(*data), GFP_KERNEL);
3930 if (data != NULL) {
3931 struct nfs_server *server = NFS_SERVER(dir);
3932
14c43f76
DQ		 3933 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3934 if (IS_ERR(data->label))
3935 goto out_free;
3936
57dc9a57
TM		 3937 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3938 data->msg.rpc_argp = &data->arg;
3939 data->msg.rpc_resp = &data->res;
3940 data->arg.dir_fh = NFS_FH(dir);
3941 data->arg.server = server;
3942 data->arg.name = name;
3943 data->arg.attrs = sattr;
3944 data->arg.ftype = ftype;
aa9c2669 3945 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3946 data->res.server = server;
3947 data->res.fh = &data->fh;
3948 data->res.fattr = &data->fattr;
1775fd3e 3949 data->res.label = data->label;
57dc9a57 3950 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3951 }
3952 return data;
14c43f76
DQ		 3953out_free:
3954 kfree(data);
3955 return NULL;
57dc9a57
TM		 3956}
3957
3958static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3959{
7c513058 3960 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3961 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3962 if (status == 0) {
3963 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3964 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3965 }
3966 return status;
3967}
3968
3969static void nfs4_free_createdata(struct nfs4_createdata *data)
3970{
14c43f76 3971 nfs4_label_free(data->label);
57dc9a57
TM		 3972 kfree(data);
3973}
3974
4f390c15 3975static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3976 struct page *page, unsigned int len, struct iattr *sattr,
3977 struct nfs4_label *label)
1da177e4 3978{
57dc9a57
TM		 3979 struct nfs4_createdata *data;
3980 int status = -ENAMETOOLONG;
1da177e4 3981
94a6d753 3982 if (len > NFS4_MAXPATHLEN)
57dc9a57 3983 goto out;
4f390c15 3984
57dc9a57
TM		 3985 status = -ENOMEM;
3986 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3987 if (data == NULL)
3988 goto out;
3989
3990 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3991 data->arg.u.symlink.pages = &page;
3992 data->arg.u.symlink.len = len;
1775fd3e 3993 data->arg.label = label;
1da177e4 3994
57dc9a57
TM		 3995 status = nfs4_do_create(dir, dentry, data);
3996
3997 nfs4_free_createdata(data);
3998out:
1da177e4
LT		 3999 return status;
4000}
4001
4f390c15 4002static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 4003 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 4004{
4005 struct nfs4_exception exception = { };
aa9c2669 4006 struct nfs4_label l, *label = NULL;
1da177e4 4007 int err;
aa9c2669
DQ		 4008
4009 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4010
1da177e4 4011 do {
078ea3df
TM		 4012 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4013 trace_nfs4_symlink(dir, &dentry->d_name, err);
4014 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4015 &exception);
4016 } while (exception.retry);
aa9c2669
DQ		 4017
4018 nfs4_label_release_security(label);
1da177e4
LT		 4019 return err;
4020}
4021
4022static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 4023 struct iattr *sattr, struct nfs4_label *label)
1da177e4 4024{
57dc9a57
TM		 4025 struct nfs4_createdata *data;
4026 int status = -ENOMEM;
1da177e4 4027
57dc9a57
TM		 4028 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4029 if (data == NULL)
4030 goto out;
4031
1775fd3e 4032 data->arg.label = label;
57dc9a57
TM		 4033 status = nfs4_do_create(dir, dentry, data);
4034
4035 nfs4_free_createdata(data);
4036out:
1da177e4
LT		 4037 return status;
4038}
4039
4040static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4041 struct iattr *sattr)
4042{
4043 struct nfs4_exception exception = { };
aa9c2669 4044 struct nfs4_label l, *label = NULL;
1da177e4 4045 int err;
a8a5da99 4046
aa9c2669
DQ		 4047 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4048
a8a5da99 4049 sattr->ia_mode &= ~current_umask();
1da177e4 4050 do {
078ea3df
TM		 4051 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4052 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4053 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4054 &exception);
4055 } while (exception.retry);
aa9c2669
DQ		 4056 nfs4_label_release_security(label);
4057
1da177e4
LT		 4058 return err;
4059}
4060
4061static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4062 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4 4063{
2b0143b5 4064 struct inode *dir = d_inode(dentry);
1da177e4
LT		 4065 struct nfs4_readdir_arg args = {
4066 .fh = NFS_FH(dir),
56e4ebf8 4067 .pages = pages,
1da177e4
LT		 4068 .pgbase = 0,
4069 .count = count,
2b0143b5 4070 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 4071 .plus = plus,
1da177e4
LT		 4072 };
4073 struct nfs4_readdir_res res;
4074 struct rpc_message msg = {
4075 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4076 .rpc_argp = &args,
4077 .rpc_resp = &res,
4078 .rpc_cred = cred,
4079 };
4080 int status;
4081
6de1472f
AV		 4082 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4083 dentry,
eadf4598 4084 (unsigned long long)cookie);
c3f52af3 4085 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 4086 res.pgbase = args.pgbase;
7c513058 4087 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 4088 if (status >= 0) {
c3f52af3 4089 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 4090 status += args.pgbase;
4091 }
c4812998
TM		 4092
4093 nfs_invalidate_atime(dir);
4094
3110ff80 4095 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 4096 return status;
4097}
4098
4099static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4100 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 4101{
4102 struct nfs4_exception exception = { };
4103 int err;
4104 do {
c1578b76
TM		 4105 err = _nfs4_proc_readdir(dentry, cred, cookie,
4106 pages, count, plus);
2b0143b5
DH		 4107 trace_nfs4_readdir(d_inode(dentry), err);
4108 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 4109 &exception);
4110 } while (exception.retry);
4111 return err;
4112}
4113
4114static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 4115 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 4116{
57dc9a57
TM		 4117 struct nfs4_createdata *data;
4118 int mode = sattr->ia_mode;
4119 int status = -ENOMEM;
1da177e4 4120
57dc9a57
TM		 4121 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4122 if (data == NULL)
4123 goto out;
4124
1da177e4 4125 if (S_ISFIFO(mode))
57dc9a57 4126 data->arg.ftype = NF4FIFO;
1da177e4 4127 else if (S_ISBLK(mode)) {
57dc9a57
TM		 4128 data->arg.ftype = NF4BLK;
4129 data->arg.u.device.specdata1 = MAJOR(rdev);
4130 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 4131 }
4132 else if (S_ISCHR(mode)) {
57dc9a57
TM		 4133 data->arg.ftype = NF4CHR;
4134 data->arg.u.device.specdata1 = MAJOR(rdev);
4135 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 4136 } else if (!S_ISSOCK(mode)) {
4137 status = -EINVAL;
4138 goto out_free;
1da177e4 4139 }
1775fd3e 4140
aa9c2669 4141 data->arg.label = label;
57dc9a57 4142 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 4143out_free:
57dc9a57
TM		 4144 nfs4_free_createdata(data);
4145out:
1da177e4
LT		 4146 return status;
4147}
4148
4149static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4150 struct iattr *sattr, dev_t rdev)
4151{
4152 struct nfs4_exception exception = { };
aa9c2669 4153 struct nfs4_label l, *label = NULL;
1da177e4 4154 int err;
a8a5da99 4155
aa9c2669
DQ		 4156 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4157
a8a5da99 4158 sattr->ia_mode &= ~current_umask();
1da177e4 4159 do {
078ea3df
TM		 4160 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4161 trace_nfs4_mknod(dir, &dentry->d_name, err);
4162 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4163 &exception);
4164 } while (exception.retry);
aa9c2669
DQ		 4165
4166 nfs4_label_release_security(label);
4167
1da177e4
LT		 4168 return err;
4169}
4170
4171static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4172 struct nfs_fsstat *fsstat)
4173{
4174 struct nfs4_statfs_arg args = {
4175 .fh = fhandle,
4176 .bitmask = server->attr_bitmask,
4177 };
24ad148a
BH		 4178 struct nfs4_statfs_res res = {
4179 .fsstat = fsstat,
4180 };
1da177e4
LT		 4181 struct rpc_message msg = {
4182 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4183 .rpc_argp = &args,
24ad148a 4184 .rpc_resp = &res,
1da177e4
LT		 4185 };
4186
0e574af1 4187 nfs_fattr_init(fsstat->fattr);
7c513058 4188 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4189}
4190
4191static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4192{
4193 struct nfs4_exception exception = { };
4194 int err;
4195 do {
4196 err = nfs4_handle_exception(server,
4197 _nfs4_proc_statfs(server, fhandle, fsstat),
4198 &exception);
4199 } while (exception.retry);
4200 return err;
4201}
4202
4203static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4204 struct nfs_fsinfo *fsinfo)
4205{
4206 struct nfs4_fsinfo_arg args = {
4207 .fh = fhandle,
4208 .bitmask = server->attr_bitmask,
4209 };
3dda5e43
BH		 4210 struct nfs4_fsinfo_res res = {
4211 .fsinfo = fsinfo,
4212 };
1da177e4
LT		 4213 struct rpc_message msg = {
4214 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4215 .rpc_argp = &args,
3dda5e43 4216 .rpc_resp = &res,
1da177e4
LT		 4217 };
4218
7c513058 4219 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4220}
4221
4222static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4223{
4224 struct nfs4_exception exception = { };
83ca7f5a 4225 unsigned long now = jiffies;
1da177e4
LT		 4226 int err;
4227
4228 do {
83ca7f5a 4229 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4230 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 4231 if (err == 0) {
4232 struct nfs_client *clp = server->nfs_client;
4233
4234 spin_lock(&clp->cl_lock);
4235 clp->cl_lease_time = fsinfo->lease_time * HZ;
4236 clp->cl_last_renewal = now;
4237 spin_unlock(&clp->cl_lock);
4238 break;
4239 }
4240 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4241 } while (exception.retry);
4242 return err;
4243}
4244
4245static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4246{
e38eb650
BS		 4247 int error;
4248
0e574af1 4249 nfs_fattr_init(fsinfo->fattr);
e38eb650 4250 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4251 if (error == 0) {
4252 /* block layout checks this! */
4253 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4254 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4255 }
e38eb650
BS		 4256
4257 return error;
1da177e4
LT		 4258}
4259
4260static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4261 struct nfs_pathconf *pathconf)
4262{
4263 struct nfs4_pathconf_arg args = {
4264 .fh = fhandle,
4265 .bitmask = server->attr_bitmask,
4266 };
d45b2989
BH		 4267 struct nfs4_pathconf_res res = {
4268 .pathconf = pathconf,
4269 };
1da177e4
LT		 4270 struct rpc_message msg = {
4271 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4272 .rpc_argp = &args,
d45b2989 4273 .rpc_resp = &res,
1da177e4
LT		 4274 };
4275
4276 /* None of the pathconf attributes are mandatory to implement */
4277 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4278 memset(pathconf, 0, sizeof(*pathconf));
4279 return 0;
4280 }
4281
0e574af1 4282 nfs_fattr_init(pathconf->fattr);
7c513058 4283 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4284}
4285
4286static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4287 struct nfs_pathconf *pathconf)
4288{
4289 struct nfs4_exception exception = { };
4290 int err;
4291
4292 do {
4293 err = nfs4_handle_exception(server,
4294 _nfs4_proc_pathconf(server, fhandle, pathconf),
4295 &exception);
4296 } while (exception.retry);
4297 return err;
4298}
4299
5521abfd 4300int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4301 const struct nfs_open_context *ctx,
4302 const struct nfs_lock_context *l_ctx,
4303 fmode_t fmode)
4304{
4305 const struct nfs_lockowner *lockowner = NULL;
4306
4307 if (l_ctx != NULL)
4308 lockowner = &l_ctx->lockowner;
abf4e13c 4309 return nfs4_select_rw_stateid(ctx->state, fmode, lockowner, stateid, NULL);
9b206149
TM		 4310}
4311EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4312
5521abfd
TM		 4313static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4314 const struct nfs_open_context *ctx,
4315 const struct nfs_lock_context *l_ctx,
4316 fmode_t fmode)
4317{
4318 nfs4_stateid current_stateid;
4319
e1253be0
TM		 4320 /* If the current stateid represents a lost lock, then exit */
4321 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4322 return true;
5521abfd
TM		 4323 return nfs4_stateid_match(stateid, &current_stateid);
4324}
4325
4326static bool nfs4_error_stateid_expired(int err)
4327{
4328 switch (err) {
4329 case -NFS4ERR_DELEG_REVOKED:
4330 case -NFS4ERR_ADMIN_REVOKED:
4331 case -NFS4ERR_BAD_STATEID:
4332 case -NFS4ERR_STALE_STATEID:
4333 case -NFS4ERR_OLD_STATEID:
4334 case -NFS4ERR_OPENMODE:
4335 case -NFS4ERR_EXPIRED:
4336 return true;
4337 }
4338 return false;
4339}
4340
d45f60c6 4341void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4342{
d45f60c6 4343 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4344}
4345
d45f60c6 4346static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4347{
d45f60c6 4348 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4349
d45f60c6
WAA		 4350 trace_nfs4_read(hdr, task->tk_status);
4351 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4352 hdr->args.context->state,
4353 NULL) == -EAGAIN) {
d00c5d43 4354 rpc_restart_call_prepare(task);
ec06c096 4355 return -EAGAIN;
1da177e4 4356 }
8850df99 4357
d45f60c6 4358 __nfs4_read_done_cb(hdr);
1da177e4 4359 if (task->tk_status > 0)
d45f60c6 4360 renew_lease(server, hdr->timestamp);
ec06c096 4361 return 0;
1da177e4
LT		 4362}
4363
5521abfd 4364static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4365 struct nfs_pgio_args *args)
5521abfd
TM		 4366{
4367
4368 if (!nfs4_error_stateid_expired(task->tk_status) ||
4369 nfs4_stateid_is_current(&args->stateid,
4370 args->context,
4371 args->lock_context,
4372 FMODE_READ))
4373 return false;
4374 rpc_restart_call_prepare(task);
4375 return true;
4376}
4377
d45f60c6 4378static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4379{
4380
4381 dprintk("--> %s\n", __func__);
4382
d45f60c6 4383 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4384 return -EAGAIN;
d45f60c6 4385 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4386 return -EAGAIN;
d45f60c6
WAA		 4387 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4388 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4389}
4390
d45f60c6
WAA		 4391static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4392 struct rpc_message *msg)
1da177e4 4393{
d45f60c6
WAA		 4394 hdr->timestamp = jiffies;
4395 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4396 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4397 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4398}
4399
d45f60c6
WAA		 4400static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4401 struct nfs_pgio_header *hdr)
ea7c3303 4402{
d45f60c6
WAA		 4403 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4404 &hdr->args.seq_args,
4405 &hdr->res.seq_res,
9b206149 4406 task))
ef1820f9 4407 return 0;
d45f60c6
WAA		 4408 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4409 hdr->args.lock_context,
4410 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4411 return -EIO;
d45f60c6 4412 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4413 return -EIO;
4414 return 0;
1da177e4
LT		 4415}
4416
d45f60c6
WAA		 4417static int nfs4_write_done_cb(struct rpc_task *task,
4418 struct nfs_pgio_header *hdr)
1da177e4 4419{
d45f60c6 4420 struct inode *inode = hdr->inode;
8478eaa1 4421
d45f60c6
WAA		 4422 trace_nfs4_write(hdr, task->tk_status);
4423 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4424 hdr->args.context->state,
4425 NULL) == -EAGAIN) {
d00c5d43 4426 rpc_restart_call_prepare(task);
788e7a89 4427 return -EAGAIN;
1da177e4 4428 }
4f9838c7 4429 if (task->tk_status >= 0) {
d45f60c6 4430 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4431 nfs_writeback_update_inode(hdr);
4f9838c7 4432 }
788e7a89 4433 return 0;
1da177e4
LT		 4434}
4435
5521abfd 4436static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4437 struct nfs_pgio_args *args)
5521abfd
TM		 4438{
4439
4440 if (!nfs4_error_stateid_expired(task->tk_status) ||
4441 nfs4_stateid_is_current(&args->stateid,
4442 args->context,
4443 args->lock_context,
4444 FMODE_WRITE))
4445 return false;
4446 rpc_restart_call_prepare(task);
4447 return true;
4448}
4449
d45f60c6 4450static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4451{
d45f60c6 4452 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4453 return -EAGAIN;
d45f60c6 4454 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4455 return -EAGAIN;
d45f60c6
WAA		 4456 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4457 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4458}
4459
5a37f851 4460static
d45f60c6 4461bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4462{
5a37f851 4463 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4464 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4465 return false;
4466 /* Otherwise, request attributes if and only if we don't hold
4467 * a delegation
4468 */
011e2a7f 4469 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4470}
a69aef14 4471
d45f60c6
WAA		 4472static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4473 struct rpc_message *msg)
1da177e4 4474{
d45f60c6 4475 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4476
d45f60c6
WAA		 4477 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4478 hdr->args.bitmask = NULL;
4479 hdr->res.fattr = NULL;
7ffd1064 4480 } else
d45f60c6 4481 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4482
d45f60c6
WAA		 4483 if (!hdr->pgio_done_cb)
4484 hdr->pgio_done_cb = nfs4_write_done_cb;
4485 hdr->res.server = server;
4486 hdr->timestamp = jiffies;
1da177e4 4487
bdc7f021 4488 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4489 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4490}
4491
0b7c0153 4492static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4493{
d9afbd1b
TM		 4494 nfs4_setup_sequence(NFS_SERVER(data->inode),
4495 &data->args.seq_args,
4496 &data->res.seq_res,
4497 task);
1da177e4
LT		 4498}
4499
0b7c0153 4500static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4501{
1da177e4 4502 struct inode *inode = data->inode;
14516c3a 4503
cc668ab3 4504 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4505 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4506 NULL, NULL) == -EAGAIN) {
d00c5d43 4507 rpc_restart_call_prepare(task);
788e7a89 4508 return -EAGAIN;
1da177e4 4509 }
788e7a89 4510 return 0;
1da177e4
LT		 4511}
4512
0b7c0153 4513static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4514{
4515 if (!nfs4_sequence_done(task, &data->res.seq_res))
4516 return -EAGAIN;
0b7c0153 4517 return data->commit_done_cb(task, data);
5f452431
FI		 4518}
4519
0b7c0153 4520static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4521{
788e7a89 4522 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4523
0b7c0153
FI		 4524 if (data->commit_done_cb == NULL)
4525 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4526 data->res.server = server;
bdc7f021 4527 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4528 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4529}
4530
9bc4e3ca
CL		 4531struct nfs4_renewdata {
4532 struct nfs_client *client;
4533 unsigned long timestamp;
4534};
4535
1da177e4
LT		 4536/*
4537 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4538 * standalone procedure for queueing an asynchronous RENEW.
4539 */
9bc4e3ca 4540static void nfs4_renew_release(void *calldata)
dc96aef9 4541{
9bc4e3ca
CL		 4542 struct nfs4_renewdata *data = calldata;
4543 struct nfs_client *clp = data->client;
dc96aef9 4544
0851de06
AB		 4545 if (atomic_read(&clp->cl_count) > 1)
4546 nfs4_schedule_state_renewal(clp);
4547 nfs_put_client(clp);
9bc4e3ca 4548 kfree(data);
dc96aef9
AB		 4549}
4550
9bc4e3ca 4551static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4552{
9bc4e3ca
CL		 4553 struct nfs4_renewdata *data = calldata;
4554 struct nfs_client *clp = data->client;
4555 unsigned long timestamp = data->timestamp;
1da177e4 4556
c6d01c6f 4557 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4558 switch (task->tk_status) {
4559 case 0:
4560 break;
4561 case -NFS4ERR_LEASE_MOVED:
4562 nfs4_schedule_lease_moved_recovery(clp);
4563 break;
4564 default:
95baa25c 4565 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4566 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4567 return;
4568 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4569 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4570 return;
4571 }
4572 nfs4_schedule_path_down_recovery(clp);
1da177e4 4573 }
452e9352 4574 do_renew_lease(clp, timestamp);
1da177e4
LT		 4575}
4576
963d8fe5
TM		 4577static const struct rpc_call_ops nfs4_renew_ops = {
4578 .rpc_call_done = nfs4_renew_done,
dc96aef9 4579 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4580};
4581
2f60ea6b 4582static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4583{
4584 struct rpc_message msg = {
4585 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4586 .rpc_argp = clp,
b4454fe1 4587 .rpc_cred = cred,
1da177e4 4588 };
9bc4e3ca 4589 struct nfs4_renewdata *data;
1da177e4 4590
2f60ea6b
TM		 4591 if (renew_flags == 0)
4592 return 0;
0851de06
AB		 4593 if (!atomic_inc_not_zero(&clp->cl_count))
4594 return -EIO;
b569ad34 4595 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4596 if (data == NULL)
4597 return -ENOMEM;
4598 data->client = clp;
4599 data->timestamp = jiffies;
bc7a05ca 4600 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4601 &nfs4_renew_ops, data);
1da177e4
LT		 4602}
4603
8534d4ec 4604static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4605{
4606 struct rpc_message msg = {
4607 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4608 .rpc_argp = clp,
b4454fe1 4609 .rpc_cred = cred,
1da177e4
LT		 4610 };
4611 unsigned long now = jiffies;
4612 int status;
4613
bc7a05ca 4614 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4615 if (status < 0)
4616 return status;
452e9352 4617 do_renew_lease(clp, now);
1da177e4
LT		 4618 return 0;
4619}
4620
aa1870af
BF		 4621static inline int nfs4_server_supports_acls(struct nfs_server *server)
4622{
7dd7d959 4623 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4624}
4625
21f498c2
TM		 4626/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4627 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4628 * the stack.
4629 */
21f498c2 4630#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4631
e9e3d724 4632static int buf_to_pages_noslab(const void *buf, size_t buflen,
8fbcf237 4633 struct page **pages)
e9e3d724
NH		 4634{
4635 struct page *newpage, **spages;
4636 int rc = 0;
4637 size_t len;
4638 spages = pages;
4639
4640 do {
21f498c2 4641 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4642 newpage = alloc_page(GFP_KERNEL);
4643
4644 if (newpage == NULL)
4645 goto unwind;
4646 memcpy(page_address(newpage), buf, len);
4647 buf += len;
4648 buflen -= len;
4649 *pages++ = newpage;
4650 rc++;
4651 } while (buflen != 0);
4652
4653 return rc;
4654
4655unwind:
4656 for(; rc > 0; rc--)
4657 __free_page(spages[rc-1]);
4658 return -ENOMEM;
4659}
4660
e50a1c2e
BF		 4661struct nfs4_cached_acl {
4662 int cached;
4663 size_t len;
3e9d4154 4664 char data[0];
e50a1c2e
BF		 4665};
4666
4667static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4668{
4669 struct nfs_inode *nfsi = NFS_I(inode);
4670
4671 spin_lock(&inode->i_lock);
4672 kfree(nfsi->nfs4_acl);
4673 nfsi->nfs4_acl = acl;
4674 spin_unlock(&inode->i_lock);
4675}
4676
4677static void nfs4_zap_acl_attr(struct inode *inode)
4678{
4679 nfs4_set_cached_acl(inode, NULL);
4680}
4681
4682static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4683{
4684 struct nfs_inode *nfsi = NFS_I(inode);
4685 struct nfs4_cached_acl *acl;
4686 int ret = -ENOENT;
4687
4688 spin_lock(&inode->i_lock);
4689 acl = nfsi->nfs4_acl;
4690 if (acl == NULL)
4691 goto out;
4692 if (buf == NULL) /* user is just asking for length */
4693 goto out_len;
4694 if (acl->cached == 0)
4695 goto out;
4696 ret = -ERANGE; /* see getxattr(2) man page */
4697 if (acl->len > buflen)
4698 goto out;
4699 memcpy(buf, acl->data, acl->len);
4700out_len:
4701 ret = acl->len;
4702out:
4703 spin_unlock(&inode->i_lock);
4704 return ret;
4705}
4706
5794d21e 4707static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4708{
4709 struct nfs4_cached_acl *acl;
b291f1b1 4710 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4711
1f1ea6c2 4712 if (buflen <= PAGE_SIZE) {
b291f1b1 4713 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4714 if (acl == NULL)
4715 goto out;
4716 acl->cached = 1;
5794d21e 4717 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4718 } else {
4719 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4720 if (acl == NULL)
4721 goto out;
4722 acl->cached = 0;
4723 }
4724 acl->len = acl_len;
4725out:
4726 nfs4_set_cached_acl(inode, acl);
4727}
4728
bf118a34
AA		 4729/*
4730 * The getxattr API returns the required buffer length when called with a
4731 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4732 * the required buf. On a NULL buf, we send a page of data to the server
4733 * guessing that the ACL request can be serviced by a page. If so, we cache
4734 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4735 * the cache. If not so, we throw away the page, and cache the required
4736 * length. The next getxattr call will then produce another round trip to
4737 * the server, this time with the input buf of the required size.
4738 */
16b4289c 4739static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4740{
bf118a34 4741 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4742 struct nfs_getaclargs args = {
4743 .fh = NFS_FH(inode),
4744 .acl_pages = pages,
4745 .acl_len = buflen,
4746 };
663c79b3
BH		 4747 struct nfs_getaclres res = {
4748 .acl_len = buflen,
4749 };
aa1870af
BF		 4750 struct rpc_message msg = {
4751 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4752 .rpc_argp = &args,
663c79b3 4753 .rpc_resp = &res,
aa1870af 4754 };
21f498c2
TM		 4755 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4756 int ret = -ENOMEM, i;
aa1870af 4757
bf118a34
AA		 4758 /* As long as we're doing a round trip to the server anyway,
4759 * let's be prepared for a page of acl data. */
4760 if (npages == 0)
4761 npages = 1;
21f498c2
TM		 4762 if (npages > ARRAY_SIZE(pages))
4763 return -ERANGE;
5a006899 4764
bf118a34
AA		 4765 for (i = 0; i < npages; i++) {
4766 pages[i] = alloc_page(GFP_KERNEL);
4767 if (!pages[i])
4768 goto out_free;
e50a1c2e 4769 }
5a006899
SP		 4770
4771 /* for decoding across pages */
4772 res.acl_scratch = alloc_page(GFP_KERNEL);
4773 if (!res.acl_scratch)
4774 goto out_free;
4775
bf118a34 4776 args.acl_len = npages * PAGE_SIZE;
5a006899 4777
de040bec 4778 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4779 __func__, buf, buflen, npages, args.acl_len);
4780 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4781 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4782 if (ret)
4783 goto out_free;
bf118a34 4784
1f1ea6c2
TM		 4785 /* Handle the case where the passed-in buffer is too short */
4786 if (res.acl_flags & NFS4_ACL_TRUNC) {
4787 /* Did the user only issue a request for the acl length? */
4788 if (buf == NULL)
4789 goto out_ok;
e50a1c2e 4790 ret = -ERANGE;
1f1ea6c2 4791 goto out_free;
e50a1c2e 4792 }
1f1ea6c2 4793 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4794 if (buf) {
4795 if (res.acl_len > buflen) {
4796 ret = -ERANGE;
4797 goto out_free;
4798 }
1f1ea6c2 4799 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4800 }
1f1ea6c2
TM		 4801out_ok:
4802 ret = res.acl_len;
e50a1c2e 4803out_free:
bf118a34
AA		 4804 for (i = 0; i < npages; i++)
4805 if (pages[i])
4806 __free_page(pages[i]);
331818f1
TM		 4807 if (res.acl_scratch)
4808 __free_page(res.acl_scratch);
aa1870af
BF		 4809 return ret;
4810}
4811
16b4289c
TM		 4812static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4813{
4814 struct nfs4_exception exception = { };
4815 ssize_t ret;
4816 do {
4817 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4818 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4819 if (ret >= 0)
4820 break;
4821 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4822 } while (exception.retry);
4823 return ret;
4824}
4825
e50a1c2e
BF		 4826static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4827{
4828 struct nfs_server *server = NFS_SERVER(inode);
4829 int ret;
4830
4831 if (!nfs4_server_supports_acls(server))
4832 return -EOPNOTSUPP;
4833 ret = nfs_revalidate_inode(server, inode);
4834 if (ret < 0)
4835 return ret;
08a22b39
AK		 4836 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4837 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4838 ret = nfs4_read_cached_acl(inode, buf, buflen);
4839 if (ret != -ENOENT)
bf118a34
AA		 4840 /* -ENOENT is returned if there is no ACL or if there is an ACL
4841 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4842 return ret;
4843 return nfs4_get_acl_uncached(inode, buf, buflen);
4844}
4845
16b4289c 4846static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4847{
4848 struct nfs_server *server = NFS_SERVER(inode);
4849 struct page *pages[NFS4ACL_MAXPAGES];
4850 struct nfs_setaclargs arg = {
4851 .fh = NFS_FH(inode),
4852 .acl_pages = pages,
4853 .acl_len = buflen,
4854 };
73c403a9 4855 struct nfs_setaclres res;
4b580ee3
BF		 4856 struct rpc_message msg = {
4857 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4858 .rpc_argp = &arg,
73c403a9 4859 .rpc_resp = &res,
4b580ee3 4860 };
21f498c2 4861 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4862 int ret, i;
4b580ee3
BF		 4863
4864 if (!nfs4_server_supports_acls(server))
4865 return -EOPNOTSUPP;
21f498c2
TM		 4866 if (npages > ARRAY_SIZE(pages))
4867 return -ERANGE;
8fbcf237 4868 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
e9e3d724
NH		 4869 if (i < 0)
4870 return i;
57ec14c5 4871 nfs4_inode_return_delegation(inode);
7c513058 4872 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4873
4874 /*
4875 * Free each page after tx, so the only ref left is
4876 * held by the network stack
4877 */
4878 for (; i > 0; i--)
4879 put_page(pages[i-1]);
4880
08a22b39
AK		 4881 /*
4882 * Acl update can result in inode attribute update.
4883 * so mark the attribute cache invalid.
4884 */
4885 spin_lock(&inode->i_lock);
4886 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4887 spin_unlock(&inode->i_lock);
f41f7418
TM		 4888 nfs_access_zap_cache(inode);
4889 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4890 return ret;
4891}
4892
16b4289c
TM		 4893static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4894{
4895 struct nfs4_exception exception = { };
4896 int err;
4897 do {
c1578b76
TM		 4898 err = __nfs4_proc_set_acl(inode, buf, buflen);
4899 trace_nfs4_set_acl(inode, err);
4900 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4901 &exception);
4902 } while (exception.retry);
4903 return err;
4904}
4905
aa9c2669
DQ		 4906#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4907static int _nfs4_get_security_label(struct inode *inode, void *buf,
4908 size_t buflen)
4909{
4910 struct nfs_server *server = NFS_SERVER(inode);
4911 struct nfs_fattr fattr;
4912 struct nfs4_label label = {0, 0, buflen, buf};
4913
4914 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4915 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4916 .fh = NFS_FH(inode),
4917 .bitmask = bitmask,
4918 };
4919 struct nfs4_getattr_res res = {
4920 .fattr = &fattr,
4921 .label = &label,
4922 .server = server,
4923 };
4924 struct rpc_message msg = {
4925 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4926 .rpc_argp = &arg,
aa9c2669
DQ		 4927 .rpc_resp = &res,
4928 };
4929 int ret;
4930
4931 nfs_fattr_init(&fattr);
4932
fcb63a9b 4933 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4934 if (ret)
4935 return ret;
4936 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4937 return -ENOENT;
4938 if (buflen < label.len)
4939 return -ERANGE;
4940 return 0;
4941}
4942
4943static int nfs4_get_security_label(struct inode *inode, void *buf,
4944 size_t buflen)
4945{
4946 struct nfs4_exception exception = { };
4947 int err;
4948
4949 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4950 return -EOPNOTSUPP;
4951
4952 do {
c1578b76
TM		 4953 err = _nfs4_get_security_label(inode, buf, buflen);
4954 trace_nfs4_get_security_label(inode, err);
4955 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4956 &exception);
4957 } while (exception.retry);
4958 return err;
4959}
4960
4961static int _nfs4_do_set_security_label(struct inode *inode,
4962 struct nfs4_label *ilabel,
4963 struct nfs_fattr *fattr,
4964 struct nfs4_label *olabel)
4965{
4966
4967 struct iattr sattr = {0};
4968 struct nfs_server *server = NFS_SERVER(inode);
4969 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4970 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4971 .fh = NFS_FH(inode),
4972 .iap = &sattr,
4973 .server = server,
4974 .bitmask = bitmask,
4975 .label = ilabel,
4976 };
4977 struct nfs_setattrres res = {
4978 .fattr = fattr,
4979 .label = olabel,
4980 .server = server,
4981 };
4982 struct rpc_message msg = {
4983 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4984 .rpc_argp = &arg,
aa9c2669
DQ		 4985 .rpc_resp = &res,
4986 };
4987 int status;
4988
12207f69 4989 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4990
12207f69 4991 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4992 if (status)
4993 dprintk("%s failed: %d\n", __func__, status);
4994
4995 return status;
4996}
4997
4998static int nfs4_do_set_security_label(struct inode *inode,
4999 struct nfs4_label *ilabel,
5000 struct nfs_fattr *fattr,
5001 struct nfs4_label *olabel)
5002{
5003 struct nfs4_exception exception = { };
5004 int err;
5005
5006 do {
c1578b76
TM		 5007 err = _nfs4_do_set_security_label(inode, ilabel,
5008 fattr, olabel);
5009 trace_nfs4_set_security_label(inode, err);
5010 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5011 &exception);
5012 } while (exception.retry);
5013 return err;
5014}
5015
5016static int
59301226 5017nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
aa9c2669
DQ		 5018{
5019 struct nfs4_label ilabel, *olabel = NULL;
5020 struct nfs_fattr fattr;
5021 struct rpc_cred *cred;
aa9c2669
DQ		 5022 int status;
5023
5024 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5025 return -EOPNOTSUPP;
5026
5027 nfs_fattr_init(&fattr);
5028
5029 ilabel.pi = 0;
5030 ilabel.lfs = 0;
5031 ilabel.label = (char *)buf;
5032 ilabel.len = buflen;
5033
5034 cred = rpc_lookup_cred();
5035 if (IS_ERR(cred))
5036 return PTR_ERR(cred);
5037
5038 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5039 if (IS_ERR(olabel)) {
5040 status = -PTR_ERR(olabel);
5041 goto out;
5042 }
5043
5044 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5045 if (status == 0)
5046 nfs_setsecurity(inode, &fattr, olabel);
5047
5048 nfs4_label_free(olabel);
5049out:
5050 put_rpccred(cred);
5051 return status;
5052}
5053#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5054
5055
f092075d
CL		 5056static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5057 nfs4_verifier *bootverf)
cd93710e
CL		 5058{
5059 __be32 verf[2];
5060
2c820d9a
CL		 5061 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5062 /* An impossible timestamp guarantees this value
5063 * will never match a generated boot time. */
5064 verf[0] = 0;
17f26b12 5065 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 5066 } else {
f092075d 5067 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 5068 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
5069 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 5070 }
cd93710e
CL		 5071 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5072}
5073
a3192688
JL		 5074static int
5075nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 5076{
a3192688
JL		 5077 size_t len;
5078 char *str;
e984a55a 5079
ceb3a16c 5080 if (clp->cl_owner_id != NULL)
a3192688 5081 return 0;
4a3e5779 5082
a3192688 5083 rcu_read_lock();
4a70316c 5084 len = 14 + strlen(clp->cl_ipaddr) + 1 +
a3192688
JL		 5085 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5086 1 +
5087 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5088 1;
5089 rcu_read_unlock();
5090
5091 if (len > NFS4_OPAQUE_LIMIT + 1)
5092 return -EINVAL;
5093
5094 /*
5095 * Since this string is allocated at mount time, and held until the
5096 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5097 * about a memory-reclaim deadlock.
5098 */
5099 str = kmalloc(len, GFP_KERNEL);
5100 if (!str)
5101 return -ENOMEM;
ceb3a16c 5102
e984a55a 5103 rcu_read_lock();
f2dd436e 5104 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
a3192688
JL		 5105 clp->cl_ipaddr,
5106 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5107 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5108 rcu_read_unlock();
a3192688 5109
a3192688
JL		 5110 clp->cl_owner_id = str;
5111 return 0;
e984a55a
CL		 5112}
5113
873e3851
JL		 5114static int
5115nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5116{
873e3851
JL		 5117 size_t len;
5118 char *str;
5119
5120 len = 10 + 10 + 1 + 10 + 1 +
5121 strlen(nfs4_client_id_uniquifier) + 1 +
5122 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5123
5124 if (len > NFS4_OPAQUE_LIMIT + 1)
5125 return -EINVAL;
5126
5127 /*
5128 * Since this string is allocated at mount time, and held until the
5129 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5130 * about a memory-reclaim deadlock.
5131 */
5132 str = kmalloc(len, GFP_KERNEL);
5133 if (!str)
5134 return -ENOMEM;
5135
f2dd436e 5136 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
873e3851
JL		 5137 clp->rpc_ops->version, clp->cl_minorversion,
5138 nfs4_client_id_uniquifier,
5139 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5140 clp->cl_owner_id = str;
5141 return 0;
5142}
5143
5144static int
5145nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5146{
873e3851
JL		 5147 size_t len;
5148 char *str;
ceb3a16c
TM		 5149
5150 if (clp->cl_owner_id != NULL)
873e3851 5151 return 0;
6f2ea7f2
CL		 5152
5153 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5154 return nfs4_init_uniquifier_client_string(clp);
5155
5156 len = 10 + 10 + 1 + 10 + 1 +
5157 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5158
5159 if (len > NFS4_OPAQUE_LIMIT + 1)
5160 return -EINVAL;
5161
5162 /*
5163 * Since this string is allocated at mount time, and held until the
5164 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5165 * about a memory-reclaim deadlock.
5166 */
5167 str = kmalloc(len, GFP_KERNEL);
5168 if (!str)
5169 return -ENOMEM;
5170
f2dd436e 5171 scnprintf(str, len, "Linux NFSv%u.%u %s",
873e3851
JL		 5172 clp->rpc_ops->version, clp->cl_minorversion,
5173 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5174 clp->cl_owner_id = str;
5175 return 0;
e984a55a
CL		 5176}
5177
706cb8db
CL		 5178/*
5179 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5180 * services. Advertise one based on the address family of the
5181 * clientaddr.
5182 */
5183static unsigned int
5184nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5185{
5186 if (strchr(clp->cl_ipaddr, ':') != NULL)
5187 return scnprintf(buf, len, "tcp6");
5188 else
5189 return scnprintf(buf, len, "tcp");
5190}
5191
f11b2a1c
JL		 5192static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5193{
5194 struct nfs4_setclientid *sc = calldata;
5195
5196 if (task->tk_status == 0)
5197 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5198}
5199
5200static const struct rpc_call_ops nfs4_setclientid_ops = {
5201 .rpc_call_done = nfs4_setclientid_done,
5202};
5203
6bbb4ae8
CL		 5204/**
5205 * nfs4_proc_setclientid - Negotiate client ID
5206 * @clp: state data structure
5207 * @program: RPC program for NFSv4 callback service
5208 * @port: IP port number for NFS4 callback service
5209 * @cred: RPC credential to use for this call
5210 * @res: where to place the result
5211 *
5212 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5213 */
bb8b27e5
TM		 5214int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5215 unsigned short port, struct rpc_cred *cred,
5216 struct nfs4_setclientid_res *res)
1da177e4
LT		 5217{
5218 nfs4_verifier sc_verifier;
5219 struct nfs4_setclientid setclientid = {
5220 .sc_verifier = &sc_verifier,
5221 .sc_prog = program,
3a6bb738 5222 .sc_clnt = clp,
1da177e4
LT		 5223 };
5224 struct rpc_message msg = {
5225 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5226 .rpc_argp = &setclientid,
bb8b27e5 5227 .rpc_resp = res,
286d7d6a 5228 .rpc_cred = cred,
1da177e4 5229 };
f11b2a1c
JL		 5230 struct rpc_task *task;
5231 struct rpc_task_setup task_setup_data = {
5232 .rpc_client = clp->cl_rpcclient,
5233 .rpc_message = &msg,
5234 .callback_ops = &nfs4_setclientid_ops,
5235 .callback_data = &setclientid,
5236 .flags = RPC_TASK_TIMEOUT,
5237 };
6bbb4ae8 5238 int status;
1da177e4 5239
de734831 5240 /* nfs_client_id4 */
f092075d 5241 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5242
5243 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5244 status = nfs4_init_uniform_client_string(clp);
5245 else
a3192688 5246 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5247
5248 if (status)
5249 goto out;
3a6bb738 5250
de734831 5251 /* cb_client4 */
706cb8db
CL		 5252 setclientid.sc_netid_len =
5253 nfs4_init_callback_netid(clp,
5254 setclientid.sc_netid,
5255 sizeof(setclientid.sc_netid));
de734831 5256 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5257 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5258 clp->cl_ipaddr, port >> 8, port & 255);
5259
3a6bb738 5260 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5261 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5262 clp->cl_owner_id);
f11b2a1c
JL		 5263 task = rpc_run_task(&task_setup_data);
5264 if (IS_ERR(task)) {
5265 status = PTR_ERR(task);
5266 goto out;
5267 }
5268 status = task->tk_status;
5269 if (setclientid.sc_cred) {
5270 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5271 put_rpccred(setclientid.sc_cred);
5272 }
5273 rpc_put_task(task);
5274out:
c6d01c6f 5275 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5276 dprintk("NFS reply setclientid: %d\n", status);
5277 return status;
1da177e4
LT		 5278}
5279
6bbb4ae8
CL		 5280/**
5281 * nfs4_proc_setclientid_confirm - Confirm client ID
5282 * @clp: state data structure
5283 * @res: result of a previous SETCLIENTID
5284 * @cred: RPC credential to use for this call
5285 *
5286 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5287 */
fd954ae1 5288int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5289 struct nfs4_setclientid_res *arg,
5290 struct rpc_cred *cred)
1da177e4 5291{
1da177e4
LT		 5292 struct rpc_message msg = {
5293 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5294 .rpc_argp = arg,
286d7d6a 5295 .rpc_cred = cred,
1da177e4 5296 };
1da177e4
LT		 5297 int status;
5298
6bbb4ae8
CL		 5299 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5300 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5301 clp->cl_clientid);
1bd714f2 5302 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5303 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5304 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5305 return status;
5306}
5307
fe650407
TM		 5308struct nfs4_delegreturndata {
5309 struct nfs4_delegreturnargs args;
fa178f29 5310 struct nfs4_delegreturnres res;
fe650407
TM		 5311 struct nfs_fh fh;
5312 nfs4_stateid stateid;
26e976a8 5313 unsigned long timestamp;
fa178f29 5314 struct nfs_fattr fattr;
fe650407 5315 int rpc_status;
039b756a
PT		 5316 struct inode *inode;
5317 bool roc;
5318 u32 roc_barrier;
fe650407
TM		 5319};
5320
fe650407
TM		 5321static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5322{
5323 struct nfs4_delegreturndata *data = calldata;
938e1010 5324
14516c3a
TM		 5325 if (!nfs4_sequence_done(task, &data->res.seq_res))
5326 return;
938e1010 5327
ca8acf8d 5328 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5329 switch (task->tk_status) {
79708861 5330 case 0:
fa178f29 5331 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5332 case -NFS4ERR_ADMIN_REVOKED:
5333 case -NFS4ERR_DELEG_REVOKED:
5334 case -NFS4ERR_BAD_STATEID:
5335 case -NFS4ERR_OLD_STATEID:
5336 case -NFS4ERR_STALE_STATEID:
5337 case -NFS4ERR_EXPIRED:
5338 task->tk_status = 0;
039b756a
PT		 5339 if (data->roc)
5340 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5341 break;
79708861 5342 default:
8478eaa1
N		 5343 if (nfs4_async_handle_error(task, data->res.server,
5344 NULL, NULL) == -EAGAIN) {
d00c5d43 5345 rpc_restart_call_prepare(task);
79708861
RL		 5346 return;
5347 }
5348 }
5349 data->rpc_status = task->tk_status;
fe650407
TM		 5350}
5351
5352static void nfs4_delegreturn_release(void *calldata)
5353{
039b756a 5354 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5355 struct inode *inode = data->inode;
039b756a 5356
ea7c38fe
TM		 5357 if (inode) {
5358 if (data->roc)
5359 pnfs_roc_release(inode);
5360 nfs_iput_and_deactive(inode);
5361 }
fe650407
TM		 5362 kfree(calldata);
5363}
5364
938e1010
AA		 5365static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5366{
5367 struct nfs4_delegreturndata *d_data;
5368
5369 d_data = (struct nfs4_delegreturndata *)data;
5370
500d701f
PT		 5371 if (nfs4_wait_on_layoutreturn(d_data->inode, task))
5372 return;
5373
4ff376fe
TM		 5374 if (d_data->roc)
5375 pnfs_roc_get_barrier(d_data->inode, &d_data->roc_barrier);
039b756a 5376
d9afbd1b
TM		 5377 nfs4_setup_sequence(d_data->res.server,
5378 &d_data->args.seq_args,
5379 &d_data->res.seq_res,
5380 task);
938e1010 5381}
938e1010 5382
c8d149f3 5383static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5384 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5385 .rpc_call_done = nfs4_delegreturn_done,
5386 .rpc_release = nfs4_delegreturn_release,
5387};
5388
e6f81075 5389static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5390{
5391 struct nfs4_delegreturndata *data;
fa178f29 5392 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5393 struct rpc_task *task;
5138fde0
TM		 5394 struct rpc_message msg = {
5395 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5396 .rpc_cred = cred,
5397 };
c970aa85
TM		 5398 struct rpc_task_setup task_setup_data = {
5399 .rpc_client = server->client,
5138fde0 5400 .rpc_message = &msg,
c970aa85
TM		 5401 .callback_ops = &nfs4_delegreturn_ops,
5402 .flags = RPC_TASK_ASYNC,
5403 };
e6f81075 5404 int status = 0;
fe650407 5405
8535b2be 5406 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5407 if (data == NULL)
5408 return -ENOMEM;
a9c92d6b 5409 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
99ade3c7
AE		 5410
5411 nfs4_state_protect(server->nfs_client,
5412 NFS_SP4_MACH_CRED_CLEANUP,
5413 &task_setup_data.rpc_client, &msg);
5414
fe650407
TM		 5415 data->args.fhandle = &data->fh;
5416 data->args.stateid = &data->stateid;
9e907fec 5417 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5418 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5419 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5420 data->res.fattr = &data->fattr;
5421 data->res.server = server;
5138fde0 5422 nfs_fattr_init(data->res.fattr);
26e976a8 5423 data->timestamp = jiffies;
fe650407 5424 data->rpc_status = 0;
ea7c38fe
TM		 5425 data->inode = nfs_igrab_and_active(inode);
5426 if (data->inode)
5427 data->roc = nfs4_roc(inode);
fe650407 5428
c970aa85 5429 task_setup_data.callback_data = data;
1174dd1f
TM		 5430 msg.rpc_argp = &data->args;
5431 msg.rpc_resp = &data->res;
c970aa85 5432 task = rpc_run_task(&task_setup_data);
7a1218a2 5433 if (IS_ERR(task))
fe650407 5434 return PTR_ERR(task);
e6f81075
TM		 5435 if (!issync)
5436 goto out;
fe650407 5437 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5438 if (status != 0)
5439 goto out;
5440 status = data->rpc_status;
e144cbcc
TM		 5441 if (status == 0)
5442 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5443 else
5444 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5445out:
e6b3c4db 5446 rpc_put_task(task);
fe650407 5447 return status;
1da177e4
LT		 5448}
5449
e6f81075 5450int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5451{
5452 struct nfs_server *server = NFS_SERVER(inode);
5453 struct nfs4_exception exception = { };
5454 int err;
5455 do {
e6f81075 5456 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
48c9579a 5457 trace_nfs4_delegreturn(inode, stateid, err);
1da177e4
LT		 5458 switch (err) {
5459 case -NFS4ERR_STALE_STATEID:
5460 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5461 case 0:
5462 return 0;
5463 }
5464 err = nfs4_handle_exception(server, err, &exception);
5465 } while (exception.retry);
5466 return err;
5467}
5468
5469#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5470#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5471
5472/*
5473 * sleep, with exponential backoff, and retry the LOCK operation.
5474 */
5475static unsigned long
5476nfs4_set_lock_task_retry(unsigned long timeout)
5477{
416ad3c9 5478 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5479 timeout <<= 1;
5480 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5481 return NFS4_LOCK_MAXTIMEOUT;
5482 return timeout;
5483}
5484
1da177e4
LT		 5485static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5486{
5487 struct inode *inode = state->inode;
5488 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5489 struct nfs_client *clp = server->nfs_client;
911d1aaf 5490 struct nfs_lockt_args arg = {
1da177e4 5491 .fh = NFS_FH(inode),
911d1aaf 5492 .fl = request,
1da177e4 5493 };
911d1aaf
TM		 5494 struct nfs_lockt_res res = {
5495 .denied = request,
1da177e4
LT		 5496 };
5497 struct rpc_message msg = {
5498 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5499 .rpc_argp = &arg,
5500 .rpc_resp = &res,
5501 .rpc_cred = state->owner->so_cred,
5502 };
1da177e4
LT		 5503 struct nfs4_lock_state *lsp;
5504 int status;
5505
911d1aaf 5506 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5507 status = nfs4_set_lock_state(state, request);
5508 if (status != 0)
5509 goto out;
5510 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5511 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5512 arg.lock_owner.s_dev = server->s_dev;
7c513058 5513 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5514 switch (status) {
5515 case 0:
5516 request->fl_type = F_UNLCK;
5517 break;
5518 case -NFS4ERR_DENIED:
5519 status = 0;
1da177e4 5520 }
70cc6487 5521 request->fl_ops->fl_release_private(request);
a6f951dd 5522 request->fl_ops = NULL;
8d0a8a9d 5523out:
1da177e4
LT		 5524 return status;
5525}
5526
5527static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5528{
5529 struct nfs4_exception exception = { };
5530 int err;
5531
5532 do {
d1b748a5
TM		 5533 err = _nfs4_proc_getlk(state, cmd, request);
5534 trace_nfs4_get_lock(request, state, cmd, err);
5535 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5536 &exception);
5537 } while (exception.retry);
5538 return err;
5539}
5540
83bfff23 5541static int do_vfs_lock(struct inode *inode, struct file_lock *fl)
1da177e4 5542{
4f656367 5543 return locks_lock_inode_wait(inode, fl);
1da177e4
LT		 5544}
5545
faf5f49c 5546struct nfs4_unlockdata {
911d1aaf
TM		 5547 struct nfs_locku_args arg;
5548 struct nfs_locku_res res;
faf5f49c
TM		 5549 struct nfs4_lock_state *lsp;
5550 struct nfs_open_context *ctx;
911d1aaf 5551 struct file_lock fl;
516285eb 5552 struct nfs_server *server;
26e976a8 5553 unsigned long timestamp;
faf5f49c
TM		 5554};
5555
911d1aaf
TM		 5556static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5557 struct nfs_open_context *ctx,
5558 struct nfs4_lock_state *lsp,
5559 struct nfs_seqid *seqid)
5560{
5561 struct nfs4_unlockdata *p;
5562 struct inode *inode = lsp->ls_state->inode;
5563
8535b2be 5564 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5565 if (p == NULL)
5566 return NULL;
5567 p->arg.fh = NFS_FH(inode);
5568 p->arg.fl = &p->fl;
5569 p->arg.seqid = seqid;
c1d51931 5570 p->res.seqid = seqid;
911d1aaf
TM		 5571 p->lsp = lsp;
5572 atomic_inc(&lsp->ls_count);
5573 /* Ensure we don't close file until we're done freeing locks! */
5574 p->ctx = get_nfs_open_context(ctx);
5575 memcpy(&p->fl, fl, sizeof(p->fl));
5576 p->server = NFS_SERVER(inode);
5577 return p;
5578}
5579
06f814a3 5580static void nfs4_locku_release_calldata(void *data)
faf5f49c 5581{
963d8fe5 5582 struct nfs4_unlockdata *calldata = data;
911d1aaf 5583 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5584 nfs4_put_lock_state(calldata->lsp);
5585 put_nfs_open_context(calldata->ctx);
5586 kfree(calldata);
faf5f49c
TM		 5587}
5588
963d8fe5 5589static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5590{
963d8fe5 5591 struct nfs4_unlockdata *calldata = data;
faf5f49c 5592
14516c3a
TM		 5593 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5594 return;
faf5f49c
TM		 5595 switch (task->tk_status) {
5596 case 0:
26e976a8 5597 renew_lease(calldata->server, calldata->timestamp);
83bfff23 5598 do_vfs_lock(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 5599 if (nfs4_update_lock_stateid(calldata->lsp,
5600 &calldata->res.stateid))
5601 break;
9e33bed5
TM		 5602 case -NFS4ERR_BAD_STATEID:
5603 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5604 case -NFS4ERR_STALE_STATEID:
5605 case -NFS4ERR_EXPIRED:
425c1d4e
TM		 5606 if (!nfs4_stateid_match(&calldata->arg.stateid,
5607 &calldata->lsp->ls_stateid))
5608 rpc_restart_call_prepare(task);
faf5f49c
TM		 5609 break;
5610 default:
8478eaa1
N		 5611 if (nfs4_async_handle_error(task, calldata->server,
5612 NULL, NULL) == -EAGAIN)
d00c5d43 5613 rpc_restart_call_prepare(task);
faf5f49c 5614 }
2b1bc308 5615 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5616}
5617
4ce70ada 5618static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5619{
4ce70ada 5620 struct nfs4_unlockdata *calldata = data;
faf5f49c 5621
911d1aaf 5622 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5623 goto out_wait;
425c1d4e 5624 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5625 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5626 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5627 goto out_no_action;
faf5f49c 5628 }
26e976a8 5629 calldata->timestamp = jiffies;
035168ab 5630 if (nfs4_setup_sequence(calldata->server,
a893693c 5631 &calldata->arg.seq_args,
2240a9e2
TM		 5632 &calldata->res.seq_res,
5633 task) != 0)
5634 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5635 return;
5636out_no_action:
5637 task->tk_action = NULL;
5638out_wait:
5639 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5640}
5641
963d8fe5 5642static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5643 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5644 .rpc_call_done = nfs4_locku_done,
06f814a3 5645 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5646};
5647
a5d16a4d
TM		 5648static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5649 struct nfs_open_context *ctx,
5650 struct nfs4_lock_state *lsp,
5651 struct nfs_seqid *seqid)
5652{
5653 struct nfs4_unlockdata *data;
5138fde0
TM		 5654 struct rpc_message msg = {
5655 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5656 .rpc_cred = ctx->cred,
5657 };
c970aa85
TM		 5658 struct rpc_task_setup task_setup_data = {
5659 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5660 .rpc_message = &msg,
c970aa85 5661 .callback_ops = &nfs4_locku_ops,
101070ca 5662 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5663 .flags = RPC_TASK_ASYNC,
5664 };
a5d16a4d 5665
fa940720
WAA		 5666 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5667 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5668
137d6aca
FF		 5669 /* Ensure this is an unlock - when canceling a lock, the
5670 * canceled lock is passed in, and it won't be an unlock.
5671 */
5672 fl->fl_type = F_UNLCK;
5673
a5d16a4d
TM		 5674 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5675 if (data == NULL) {
5676 nfs_free_seqid(seqid);
5677 return ERR_PTR(-ENOMEM);
5678 }
5679
a9c92d6b 5680 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5681 msg.rpc_argp = &data->arg;
5682 msg.rpc_resp = &data->res;
c970aa85
TM		 5683 task_setup_data.callback_data = data;
5684 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5685}
5686
faf5f49c
TM		 5687static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5688{
65b62a29
TM		 5689 struct inode *inode = state->inode;
5690 struct nfs4_state_owner *sp = state->owner;
5691 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5692 struct nfs_seqid *seqid;
1da177e4 5693 struct nfs4_lock_state *lsp;
06f814a3 5694 struct rpc_task *task;
b4019c0e 5695 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 5696 int status = 0;
536ff0f8 5697 unsigned char fl_flags = request->fl_flags;
faf5f49c 5698
8d0a8a9d 5699 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5700 /* Unlock _before_ we do the RPC call */
5701 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5702 /* Exclude nfs_delegation_claim_locks() */
5703 mutex_lock(&sp->so_delegreturn_mutex);
5704 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 5705 down_read(&nfsi->rwsem);
83bfff23 5706 if (do_vfs_lock(inode, request) == -ENOENT) {
19e03c57 5707 up_read(&nfsi->rwsem);
65b62a29 5708 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5709 goto out;
19e03c57
TM		 5710 }
5711 up_read(&nfsi->rwsem);
65b62a29 5712 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5713 if (status != 0)
9b073574
TM		 5714 goto out;
5715 /* Is this a delegated lock? */
8d0a8a9d 5716 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5717 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5718 goto out;
b4019c0e
TM		 5719 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5720 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5721 status = -ENOMEM;
badc76dd 5722 if (IS_ERR(seqid))
9b073574 5723 goto out;
cd3758e3 5724 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5725 status = PTR_ERR(task);
5726 if (IS_ERR(task))
9b073574 5727 goto out;
a5d16a4d 5728 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5729 rpc_put_task(task);
9b073574 5730out:
536ff0f8 5731 request->fl_flags = fl_flags;
d1b748a5 5732 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5733 return status;
5734}
5735
a5d16a4d
TM		 5736struct nfs4_lockdata {
5737 struct nfs_lock_args arg;
5738 struct nfs_lock_res res;
5739 struct nfs4_lock_state *lsp;
5740 struct nfs_open_context *ctx;
5741 struct file_lock fl;
26e976a8 5742 unsigned long timestamp;
a5d16a4d
TM		 5743 int rpc_status;
5744 int cancelled;
66179efe 5745 struct nfs_server *server;
a5d16a4d
TM		 5746};
5747
5748static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5749 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5750 gfp_t gfp_mask)
1da177e4 5751{
a5d16a4d
TM		 5752 struct nfs4_lockdata *p;
5753 struct inode *inode = lsp->ls_state->inode;
1da177e4 5754 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 5755 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 5756
8535b2be 5757 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5758 if (p == NULL)
5759 return NULL;
5760
5761 p->arg.fh = NFS_FH(inode);
5762 p->arg.fl = &p->fl;
8535b2be 5763 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 5764 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 5765 goto out_free;
b4019c0e
TM		 5766 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5767 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 5768 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 5769 goto out_free_seqid;
7539bbab 5770 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5771 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5772 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5773 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5774 p->lsp = lsp;
66179efe 5775 p->server = server;
a5d16a4d
TM		 5776 atomic_inc(&lsp->ls_count);
5777 p->ctx = get_nfs_open_context(ctx);
feaff8e5 5778 get_file(fl->fl_file);
a5d16a4d
TM		 5779 memcpy(&p->fl, fl, sizeof(p->fl));
5780 return p;
2f74c0a0
TM		 5781out_free_seqid:
5782 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5783out_free:
5784 kfree(p);
5785 return NULL;
5786}
5787
5788static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5789{
5790 struct nfs4_lockdata *data = calldata;
5791 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5792
3110ff80 5793 dprintk("%s: begin!\n", __func__);
2f74c0a0 5794 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5795 goto out_wait;
a5d16a4d 5796 /* Do we need to do an open_to_lock_owner? */
6b447539 5797 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 5798 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5799 goto out_release_lock_seqid;
8fe72bac 5800 }
425c1d4e
TM		 5801 nfs4_stateid_copy(&data->arg.open_stateid,
5802 &state->open_stateid);
a5d16a4d 5803 data->arg.new_lock_owner = 1;
c1d51931 5804 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 5805 } else {
2f74c0a0 5806 data->arg.new_lock_owner = 0;
425c1d4e
TM		 5807 nfs4_stateid_copy(&data->arg.lock_stateid,
5808 &data->lsp->ls_stateid);
5809 }
5d422301
TM		 5810 if (!nfs4_valid_open_stateid(state)) {
5811 data->rpc_status = -EBADF;
5812 task->tk_action = NULL;
5813 goto out_release_open_seqid;
5814 }
26e976a8 5815 data->timestamp = jiffies;
035168ab
TM		 5816 if (nfs4_setup_sequence(data->server,
5817 &data->arg.seq_args,
2240a9e2 5818 &data->res.seq_res,
d9afbd1b 5819 task) == 0)
66179efe 5820 return;
5d422301 5821out_release_open_seqid:
2240a9e2
TM		 5822 nfs_release_seqid(data->arg.open_seqid);
5823out_release_lock_seqid:
5824 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5825out_wait:
5826 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5827 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5828}
5829
a5d16a4d
TM		 5830static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5831{
5832 struct nfs4_lockdata *data = calldata;
39071e6f 5833 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 5834
3110ff80 5835 dprintk("%s: begin!\n", __func__);
a5d16a4d 5836
14516c3a
TM		 5837 if (!nfs4_sequence_done(task, &data->res.seq_res))
5838 return;
66179efe 5839
a5d16a4d 5840 data->rpc_status = task->tk_status;
425c1d4e
TM		 5841 switch (task->tk_status) {
5842 case 0:
2b0143b5 5843 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 5844 data->timestamp);
c69899a1
TM		 5845 if (data->arg.new_lock) {
5846 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
83bfff23 5847 if (do_vfs_lock(lsp->ls_state->inode, &data->fl) < 0) {
c69899a1
TM		 5848 rpc_restart_call_prepare(task);
5849 break;
5850 }
5851 }
39071e6f
TM		 5852 if (data->arg.new_lock_owner != 0) {
5853 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5854 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5855 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5856 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5857 rpc_restart_call_prepare(task);
425c1d4e
TM		 5858 break;
5859 case -NFS4ERR_BAD_STATEID:
5860 case -NFS4ERR_OLD_STATEID:
5861 case -NFS4ERR_STALE_STATEID:
5862 case -NFS4ERR_EXPIRED:
5863 if (data->arg.new_lock_owner != 0) {
5864 if (!nfs4_stateid_match(&data->arg.open_stateid,
5865 &lsp->ls_state->open_stateid))
5866 rpc_restart_call_prepare(task);
5867 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5868 &lsp->ls_stateid))
5869 rpc_restart_call_prepare(task);
a5d16a4d 5870 }
3110ff80 5871 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5872}
5873
5874static void nfs4_lock_release(void *calldata)
5875{
5876 struct nfs4_lockdata *data = calldata;
5877
3110ff80 5878 dprintk("%s: begin!\n", __func__);
2f74c0a0 5879 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5880 if (data->cancelled != 0) {
5881 struct rpc_task *task;
5882 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5883 data->arg.lock_seqid);
5884 if (!IS_ERR(task))
bf294b41 5885 rpc_put_task_async(task);
3110ff80 5886 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5887 } else
5888 nfs_free_seqid(data->arg.lock_seqid);
5889 nfs4_put_lock_state(data->lsp);
5890 put_nfs_open_context(data->ctx);
feaff8e5 5891 fput(data->fl.fl_file);
a5d16a4d 5892 kfree(data);
3110ff80 5893 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5894}
5895
5896static const struct rpc_call_ops nfs4_lock_ops = {
5897 .rpc_call_prepare = nfs4_lock_prepare,
5898 .rpc_call_done = nfs4_lock_done,
5899 .rpc_release = nfs4_lock_release,
5900};
5901
2bee72a6
TM		 5902static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5903{
2bee72a6
TM		 5904 switch (error) {
5905 case -NFS4ERR_ADMIN_REVOKED:
5906 case -NFS4ERR_BAD_STATEID:
ecac799a 5907 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5908 if (new_lock_owner != 0 ||
795a88c9 5909 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5910 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5911 break;
5912 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5913 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5914 case -NFS4ERR_EXPIRED:
5915 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5916 };
5917}
5918
afe6c27c 5919static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5920{
5921 struct nfs4_lockdata *data;
5922 struct rpc_task *task;
5138fde0
TM		 5923 struct rpc_message msg = {
5924 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5925 .rpc_cred = state->owner->so_cred,
5926 };
c970aa85
TM		 5927 struct rpc_task_setup task_setup_data = {
5928 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5929 .rpc_message = &msg,
c970aa85 5930 .callback_ops = &nfs4_lock_ops,
101070ca 5931 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5932 .flags = RPC_TASK_ASYNC,
5933 };
a5d16a4d
TM		 5934 int ret;
5935
3110ff80 5936 dprintk("%s: begin!\n", __func__);
cd3758e3 5937 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5938 fl->fl_u.nfs4_fl.owner,
5939 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5940 if (data == NULL)
5941 return -ENOMEM;
5942 if (IS_SETLKW(cmd))
5943 data->arg.block = 1;
a9c92d6b 5944 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5945 msg.rpc_argp = &data->arg;
5946 msg.rpc_resp = &data->res;
c970aa85 5947 task_setup_data.callback_data = data;
8fe72bac
TM		 5948 if (recovery_type > NFS_LOCK_NEW) {
5949 if (recovery_type == NFS_LOCK_RECLAIM)
5950 data->arg.reclaim = NFS_LOCK_RECLAIM;
5951 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 5952 } else
5953 data->arg.new_lock = 1;
c970aa85 5954 task = rpc_run_task(&task_setup_data);
7a1218a2 5955 if (IS_ERR(task))
a5d16a4d 5956 return PTR_ERR(task);
a5d16a4d
TM		 5957 ret = nfs4_wait_for_completion_rpc_task(task);
5958 if (ret == 0) {
5959 ret = data->rpc_status;
2bee72a6
TM		 5960 if (ret)
5961 nfs4_handle_setlk_error(data->server, data->lsp,
5962 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5963 } else
5964 data->cancelled = 1;
e6b3c4db 5965 rpc_put_task(task);
3110ff80 5966 dprintk("%s: done, ret = %d!\n", __func__, ret);
48c9579a 5967 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
a5d16a4d 5968 return ret;
1da177e4
LT		 5969}
5970
5971static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5972{
202b50dc 5973 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5974 struct nfs4_exception exception = {
5975 .inode = state->inode,
5976 };
202b50dc
TM		 5977 int err;
5978
5979 do {
42a2d13e
TM		 5980 /* Cache the lock if possible... */
5981 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5982 return 0;
afe6c27c 5983 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 5984 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5985 break;
5986 nfs4_handle_exception(server, err, &exception);
5987 } while (exception.retry);
5988 return err;
1da177e4
LT		 5989}
5990
5991static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5992{
202b50dc 5993 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5994 struct nfs4_exception exception = {
5995 .inode = state->inode,
5996 };
202b50dc
TM		 5997 int err;
5998
6bfc93ef
TM		 5999 err = nfs4_set_lock_state(state, request);
6000 if (err != 0)
6001 return err;
f6de7a39 6002 if (!recover_lost_locks) {
ef1820f9
N		 6003 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
6004 return 0;
6005 }
202b50dc 6006 do {
42a2d13e
TM		 6007 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6008 return 0;
afe6c27c 6009 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 6010 switch (err) {
6011 default:
6012 goto out;
6013 case -NFS4ERR_GRACE:
6014 case -NFS4ERR_DELAY:
6015 nfs4_handle_exception(server, err, &exception);
6016 err = 0;
6017 }
202b50dc 6018 } while (exception.retry);
a9ed2e25 6019out:
202b50dc 6020 return err;
1da177e4
LT		 6021}
6022
f062eb6c 6023#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 6024/**
6025 * nfs41_check_expired_locks - possibly free a lock stateid
6026 *
6027 * @state: NFSv4 state for an inode
6028 *
6029 * Returns NFS_OK if recovery for this stateid is now finished.
6030 * Otherwise a negative NFS4ERR value is returned.
6031 */
b01dd1d8 6032static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 6033{
eb64cf96 6034 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 6035 struct nfs4_lock_state *lsp;
f062eb6c
BS		 6036 struct nfs_server *server = NFS_SERVER(state->inode);
6037
b01dd1d8 6038 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 6039 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 6040 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
6041
6042 status = nfs41_test_stateid(server,
6043 &lsp->ls_stateid,
6044 cred);
08cb47fa 6045 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 6046 if (status != NFS_OK) {
3e60ffdd
CL		 6047 /* Free the stateid unless the server
6048 * informs us the stateid is unrecognized. */
89af2739
CL		 6049 if (status != -NFS4ERR_BAD_STATEID)
6050 nfs41_free_stateid(server,
ab7cb0df
TM		 6051 &lsp->ls_stateid,
6052 cred);
795a88c9 6053 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 6054 ret = status;
6055 }
6056 }
6057 };
6058
6059 return ret;
6060}
6061
6062static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6063{
6064 int status = NFS_OK;
6065
6066 if (test_bit(LK_STATE_IN_USE, &state->flags))
6067 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 6068 if (status != NFS_OK)
6069 status = nfs4_lock_expired(state, request);
6070 return status;
f062eb6c
BS		 6071}
6072#endif
6073
1da177e4
LT		 6074static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6075{
19e03c57 6076 struct nfs_inode *nfsi = NFS_I(state->inode);
11476e9d 6077 struct nfs4_state_owner *sp = state->owner;
01c3b861 6078 unsigned char fl_flags = request->fl_flags;
8e469ebd 6079 int status = -ENOLCK;
1da177e4 6080
8e469ebd
TM		 6081 if ((fl_flags & FL_POSIX) &&
6082 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6083 goto out;
6bfc93ef 6084 /* Is this a delegated open? */
6bfc93ef
TM		 6085 status = nfs4_set_lock_state(state, request);
6086 if (status != 0)
6087 goto out;
01c3b861 6088 request->fl_flags |= FL_ACCESS;
83bfff23 6089 status = do_vfs_lock(state->inode, request);
01c3b861
TM		 6090 if (status < 0)
6091 goto out;
11476e9d 6092 mutex_lock(&sp->so_delegreturn_mutex);
19e03c57 6093 down_read(&nfsi->rwsem);
01c3b861 6094 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6095 /* Yes: cache locks! */
01c3b861 6096 /* ...but avoid races with delegation recall... */
19e03c57 6097 request->fl_flags = fl_flags & ~FL_SLEEP;
83bfff23 6098 status = do_vfs_lock(state->inode, request);
c69899a1 6099 up_read(&nfsi->rwsem);
11476e9d 6100 mutex_unlock(&sp->so_delegreturn_mutex);
9a99af49 6101 goto out;
9a99af49 6102 }
19e03c57 6103 up_read(&nfsi->rwsem);
11476e9d 6104 mutex_unlock(&sp->so_delegreturn_mutex);
c69899a1 6105 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6106out:
6107 request->fl_flags = fl_flags;
1da177e4
LT		 6108 return status;
6109}
6110
6111static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6112{
a1d0b5ee
TM		 6113 struct nfs4_exception exception = {
6114 .state = state,
05ffe24f 6115 .inode = state->inode,
a1d0b5ee 6116 };
1da177e4
LT		 6117 int err;
6118
6119 do {
965b5d67
TM		 6120 err = _nfs4_proc_setlk(state, cmd, request);
6121 if (err == -NFS4ERR_DENIED)
6122 err = -EAGAIN;
1da177e4 6123 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6124 err, &exception);
1da177e4
LT		 6125 } while (exception.retry);
6126 return err;
6127}
6128
6129static int
6130nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6131{
6132 struct nfs_open_context *ctx;
6133 struct nfs4_state *state;
6134 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6135 int status;
6136
6137 /* verify open state */
cd3758e3 6138 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6139 state = ctx->state;
6140
6141 if (request->fl_start < 0 || request->fl_end < 0)
6142 return -EINVAL;
6143
d953126a
TM		 6144 if (IS_GETLK(cmd)) {
6145 if (state != NULL)
6146 return nfs4_proc_getlk(state, F_GETLK, request);
6147 return 0;
6148 }
1da177e4
LT		 6149
6150 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6151 return -EINVAL;
6152
d953126a
TM		 6153 if (request->fl_type == F_UNLCK) {
6154 if (state != NULL)
6155 return nfs4_proc_unlck(state, cmd, request);
6156 return 0;
6157 }
1da177e4 6158
d953126a
TM		 6159 if (state == NULL)
6160 return -ENOLCK;
55725513
TM		 6161 /*
6162 * Don't rely on the VFS having checked the file open mode,
6163 * since it won't do this for flock() locks.
6164 */
f44106e2 6165 switch (request->fl_type) {
55725513
TM		 6166 case F_RDLCK:
6167 if (!(filp->f_mode & FMODE_READ))
6168 return -EBADF;
6169 break;
6170 case F_WRLCK:
6171 if (!(filp->f_mode & FMODE_WRITE))
6172 return -EBADF;
6173 }
6174
1da177e4
LT		 6175 do {
6176 status = nfs4_proc_setlk(state, cmd, request);
6177 if ((status != -EAGAIN) || IS_SETLK(cmd))
6178 break;
6179 timeout = nfs4_set_lock_task_retry(timeout);
6180 status = -ERESTARTSYS;
6181 if (signalled())
6182 break;
6183 } while(status < 0);
1da177e4
LT		 6184 return status;
6185}
6186
db4f2e63 6187int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6188{
6189 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6190 int err;
6191
6192 err = nfs4_set_lock_state(state, fl);
6193 if (err != 0)
db4f2e63 6194 return err;
4a706fa0 6195 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6196 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6197}
6b3b5496 6198
cf470c3e
TM		 6199struct nfs_release_lockowner_data {
6200 struct nfs4_lock_state *lsp;
5ae67c4f 6201 struct nfs_server *server;
cf470c3e 6202 struct nfs_release_lockowner_args args;
b7e63a10 6203 struct nfs_release_lockowner_res res;
60ea6812 6204 unsigned long timestamp;
cf470c3e
TM		 6205};
6206
fbd4bfd1
CL		 6207static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6208{
6209 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6210 struct nfs_server *server = data->server;
cb04ad2a
PT		 6211 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6212 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6213 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6214 data->timestamp = jiffies;
fbd4bfd1
CL		 6215}
6216
6217static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6218{
6219 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6220 struct nfs_server *server = data->server;
6221
b7e63a10 6222 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6223
6224 switch (task->tk_status) {
6225 case 0:
6226 renew_lease(server, data->timestamp);
6227 break;
6228 case -NFS4ERR_STALE_CLIENTID:
6229 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6230 nfs4_schedule_lease_recovery(server->nfs_client);
6231 break;
60ea6812
CL		 6232 case -NFS4ERR_LEASE_MOVED:
6233 case -NFS4ERR_DELAY:
8478eaa1
N		 6234 if (nfs4_async_handle_error(task, server,
6235 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6236 rpc_restart_call_prepare(task);
6237 }
fbd4bfd1
CL		 6238}
6239
d3c7b7cc
TM		 6240static void nfs4_release_lockowner_release(void *calldata)
6241{
cf470c3e 6242 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6243 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6244 kfree(calldata);
6245}
6246
17280175 6247static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6248 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6249 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6250 .rpc_release = nfs4_release_lockowner_release,
6251};
6252
f1cdae87
JL		 6253static void
6254nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6255{
cf470c3e 6256 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6257 struct rpc_message msg = {
6258 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6259 };
6260
6261 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6262 return;
fbd4bfd1 6263
cf470c3e
TM		 6264 data = kmalloc(sizeof(*data), GFP_NOFS);
6265 if (!data)
f1cdae87 6266 return;
cf470c3e 6267 data->lsp = lsp;
5ae67c4f 6268 data->server = server;
cf470c3e
TM		 6269 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6270 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6271 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6272
cf470c3e 6273 msg.rpc_argp = &data->args;
b7e63a10
TM		 6274 msg.rpc_resp = &data->res;
6275 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6276 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6277}
6278
aa1870af
BF		 6279#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6280
d9a82a04 6281static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
59301226
AV		 6282 struct dentry *unused, struct inode *inode,
6283 const char *key, const void *buf,
6284 size_t buflen, int flags)
6b3b5496 6285{
59301226 6286 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 6287}
6288
d9a82a04 6289static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
b296821a
AV		 6290 struct dentry *unused, struct inode *inode,
6291 const char *key, void *buf, size_t buflen)
6b3b5496 6292{
b296821a 6293 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 6294}
6295
764a5c6b 6296static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6b3b5496 6297{
764a5c6b 6298 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6b3b5496
BF		 6299}
6300
c9bccef6 6301#ifdef CONFIG_NFS_V4_SECURITY_LABEL
c9bccef6 6302
d9a82a04 6303static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
59301226
AV		 6304 struct dentry *unused, struct inode *inode,
6305 const char *key, const void *buf,
6306 size_t buflen, int flags)
c9bccef6
DQ		 6307{
6308 if (security_ismaclabel(key))
59301226 6309 return nfs4_set_security_label(inode, buf, buflen);
c9bccef6
DQ		 6310
6311 return -EOPNOTSUPP;
6312}
6313
d9a82a04 6314static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
b296821a
AV		 6315 struct dentry *unused, struct inode *inode,
6316 const char *key, void *buf, size_t buflen)
c9bccef6
DQ		 6317{
6318 if (security_ismaclabel(key))
b296821a 6319 return nfs4_get_security_label(inode, buf, buflen);
c9bccef6
DQ		 6320 return -EOPNOTSUPP;
6321}
6322
c4803c49
AG		 6323static ssize_t
6324nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
c9bccef6 6325{
c4803c49 6326 int len = 0;
c9bccef6 6327
c4803c49
AG		 6328 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
6329 len = security_inode_listsecurity(inode, list, list_len);
6330 if (list_len && len > list_len)
6331 return -ERANGE;
c9bccef6
DQ		 6332 }
6333 return len;
6334}
6335
6336static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6337 .prefix = XATTR_SECURITY_PREFIX,
c9bccef6
DQ		 6338 .get = nfs4_xattr_get_nfs4_label,
6339 .set = nfs4_xattr_set_nfs4_label,
6340};
c9bccef6 6341
c4803c49
AG		 6342#else
6343
6344static ssize_t
6345nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6346{
6347 return 0;
6348}
6349
6350#endif
c9bccef6 6351
533eb461
AA		 6352/*
6353 * nfs_fhget will use either the mounted_on_fileid or the fileid
6354 */
69aaaae1
TM		 6355static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6356{
533eb461
AA		 6357 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6358 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6359 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6360 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6361 return;
6362
6363 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6364 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6365 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6366 fattr->nlink = 2;
6367}
6368
f05d147f
BS		 6369static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6370 const struct qstr *name,
6371 struct nfs4_fs_locations *fs_locations,
6372 struct page *page)
683b57b4
TM		 6373{
6374 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6375 u32 bitmask[3] = {
361e624f 6376 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6377 };
6378 struct nfs4_fs_locations_arg args = {
6379 .dir_fh = NFS_FH(dir),
c228fd3a 6380 .name = name,
683b57b4
TM		 6381 .page = page,
6382 .bitmask = bitmask,
6383 };
22958463
BH		 6384 struct nfs4_fs_locations_res res = {
6385 .fs_locations = fs_locations,
6386 };
683b57b4
TM		 6387 struct rpc_message msg = {
6388 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6389 .rpc_argp = &args,
22958463 6390 .rpc_resp = &res,
683b57b4
TM		 6391 };
6392 int status;
6393
3110ff80 6394 dprintk("%s: start\n", __func__);
533eb461
AA		 6395
6396 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6397 * is not supported */
6398 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6399 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6400 else
6401 bitmask[0] |= FATTR4_WORD0_FILEID;
6402
c228fd3a 6403 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6404 fs_locations->server = server;
830b8e33 6405 fs_locations->nlocations = 0;
f05d147f 6406 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6407 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6408 return status;
6409}
6410
f05d147f
BS		 6411int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6412 const struct qstr *name,
6413 struct nfs4_fs_locations *fs_locations,
6414 struct page *page)
db0a9593
BS		 6415{
6416 struct nfs4_exception exception = { };
6417 int err;
6418 do {
078ea3df
TM		 6419 err = _nfs4_proc_fs_locations(client, dir, name,
6420 fs_locations, page);
6421 trace_nfs4_get_fs_locations(dir, name, err);
6422 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6423 &exception);
6424 } while (exception.retry);
6425 return err;
6426}
6427
b03d735b
CL		 6428/*
6429 * This operation also signals the server that this client is
6430 * performing migration recovery. The server can stop returning
6431 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6432 * appended to this compound to identify the client ID which is
6433 * performing recovery.
6434 */
6435static int _nfs40_proc_get_locations(struct inode *inode,
6436 struct nfs4_fs_locations *locations,
6437 struct page *page, struct rpc_cred *cred)
6438{
6439 struct nfs_server *server = NFS_SERVER(inode);
6440 struct rpc_clnt *clnt = server->client;
6441 u32 bitmask[2] = {
6442 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6443 };
6444 struct nfs4_fs_locations_arg args = {
6445 .clientid = server->nfs_client->cl_clientid,
6446 .fh = NFS_FH(inode),
6447 .page = page,
6448 .bitmask = bitmask,
6449 .migration = 1, /* skip LOOKUP */
6450 .renew = 1, /* append RENEW */
6451 };
6452 struct nfs4_fs_locations_res res = {
6453 .fs_locations = locations,
6454 .migration = 1,
6455 .renew = 1,
6456 };
6457 struct rpc_message msg = {
6458 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6459 .rpc_argp = &args,
6460 .rpc_resp = &res,
6461 .rpc_cred = cred,
6462 };
6463 unsigned long now = jiffies;
6464 int status;
6465
6466 nfs_fattr_init(&locations->fattr);
6467 locations->server = server;
6468 locations->nlocations = 0;
6469
6470 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6471 nfs4_set_sequence_privileged(&args.seq_args);
6472 status = nfs4_call_sync_sequence(clnt, server, &msg,
6473 &args.seq_args, &res.seq_res);
6474 if (status)
6475 return status;
6476
6477 renew_lease(server, now);
6478 return 0;
6479}
6480
6481#ifdef CONFIG_NFS_V4_1
6482
6483/*
6484 * This operation also signals the server that this client is
6485 * performing migration recovery. The server can stop asserting
6486 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6487 * performing this operation is identified in the SEQUENCE
6488 * operation in this compound.
6489 *
6490 * When the client supports GETATTR(fs_locations_info), it can
6491 * be plumbed in here.
6492 */
6493static int _nfs41_proc_get_locations(struct inode *inode,
6494 struct nfs4_fs_locations *locations,
6495 struct page *page, struct rpc_cred *cred)
6496{
6497 struct nfs_server *server = NFS_SERVER(inode);
6498 struct rpc_clnt *clnt = server->client;
6499 u32 bitmask[2] = {
6500 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6501 };
6502 struct nfs4_fs_locations_arg args = {
6503 .fh = NFS_FH(inode),
6504 .page = page,
6505 .bitmask = bitmask,
6506 .migration = 1, /* skip LOOKUP */
6507 };
6508 struct nfs4_fs_locations_res res = {
6509 .fs_locations = locations,
6510 .migration = 1,
6511 };
6512 struct rpc_message msg = {
6513 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6514 .rpc_argp = &args,
6515 .rpc_resp = &res,
6516 .rpc_cred = cred,
6517 };
6518 int status;
6519
6520 nfs_fattr_init(&locations->fattr);
6521 locations->server = server;
6522 locations->nlocations = 0;
6523
6524 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6525 nfs4_set_sequence_privileged(&args.seq_args);
6526 status = nfs4_call_sync_sequence(clnt, server, &msg,
6527 &args.seq_args, &res.seq_res);
6528 if (status == NFS4_OK &&
6529 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6530 status = -NFS4ERR_LEASE_MOVED;
6531 return status;
6532}
6533
6534#endif /* CONFIG_NFS_V4_1 */
6535
6536/**
6537 * nfs4_proc_get_locations - discover locations for a migrated FSID
6538 * @inode: inode on FSID that is migrating
6539 * @locations: result of query
6540 * @page: buffer
6541 * @cred: credential to use for this operation
6542 *
6543 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6544 * operation failed, or a negative errno if a local error occurred.
6545 *
6546 * On success, "locations" is filled in, but if the server has
6547 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6548 * asserted.
6549 *
6550 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6551 * from this client that require migration recovery.
6552 */
6553int nfs4_proc_get_locations(struct inode *inode,
6554 struct nfs4_fs_locations *locations,
6555 struct page *page, struct rpc_cred *cred)
6556{
6557 struct nfs_server *server = NFS_SERVER(inode);
6558 struct nfs_client *clp = server->nfs_client;
6559 const struct nfs4_mig_recovery_ops *ops =
6560 clp->cl_mvops->mig_recovery_ops;
6561 struct nfs4_exception exception = { };
6562 int status;
6563
6564 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6565 (unsigned long long)server->fsid.major,
6566 (unsigned long long)server->fsid.minor,
6567 clp->cl_hostname);
6568 nfs_display_fhandle(NFS_FH(inode), __func__);
6569
6570 do {
6571 status = ops->get_locations(inode, locations, page, cred);
6572 if (status != -NFS4ERR_DELAY)
6573 break;
6574 nfs4_handle_exception(server, status, &exception);
6575 } while (exception.retry);
6576 return status;
6577}
6578
44c99933
CL		 6579/*
6580 * This operation also signals the server that this client is
6581 * performing "lease moved" recovery. The server can stop
6582 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6583 * is appended to this compound to identify the client ID which is
6584 * performing recovery.
6585 */
6586static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6587{
6588 struct nfs_server *server = NFS_SERVER(inode);
6589 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6590 struct rpc_clnt *clnt = server->client;
6591 struct nfs4_fsid_present_arg args = {
6592 .fh = NFS_FH(inode),
6593 .clientid = clp->cl_clientid,
6594 .renew = 1, /* append RENEW */
6595 };
6596 struct nfs4_fsid_present_res res = {
6597 .renew = 1,
6598 };
6599 struct rpc_message msg = {
6600 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6601 .rpc_argp = &args,
6602 .rpc_resp = &res,
6603 .rpc_cred = cred,
6604 };
6605 unsigned long now = jiffies;
6606 int status;
6607
6608 res.fh = nfs_alloc_fhandle();
6609 if (res.fh == NULL)
6610 return -ENOMEM;
6611
6612 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6613 nfs4_set_sequence_privileged(&args.seq_args);
6614 status = nfs4_call_sync_sequence(clnt, server, &msg,
6615 &args.seq_args, &res.seq_res);
6616 nfs_free_fhandle(res.fh);
6617 if (status)
6618 return status;
6619
6620 do_renew_lease(clp, now);
6621 return 0;
6622}
6623
6624#ifdef CONFIG_NFS_V4_1
6625
6626/*
6627 * This operation also signals the server that this client is
6628 * performing "lease moved" recovery. The server can stop asserting
6629 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6630 * this operation is identified in the SEQUENCE operation in this
6631 * compound.
6632 */
6633static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6634{
6635 struct nfs_server *server = NFS_SERVER(inode);
6636 struct rpc_clnt *clnt = server->client;
6637 struct nfs4_fsid_present_arg args = {
6638 .fh = NFS_FH(inode),
6639 };
6640 struct nfs4_fsid_present_res res = {
6641 };
6642 struct rpc_message msg = {
6643 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6644 .rpc_argp = &args,
6645 .rpc_resp = &res,
6646 .rpc_cred = cred,
6647 };
6648 int status;
6649
6650 res.fh = nfs_alloc_fhandle();
6651 if (res.fh == NULL)
6652 return -ENOMEM;
6653
6654 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6655 nfs4_set_sequence_privileged(&args.seq_args);
6656 status = nfs4_call_sync_sequence(clnt, server, &msg,
6657 &args.seq_args, &res.seq_res);
6658 nfs_free_fhandle(res.fh);
6659 if (status == NFS4_OK &&
6660 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6661 status = -NFS4ERR_LEASE_MOVED;
6662 return status;
6663}
6664
6665#endif /* CONFIG_NFS_V4_1 */
6666
6667/**
6668 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6669 * @inode: inode on FSID to check
6670 * @cred: credential to use for this operation
6671 *
6672 * Server indicates whether the FSID is present, moved, or not
6673 * recognized. This operation is necessary to clear a LEASE_MOVED
6674 * condition for this client ID.
6675 *
6676 * Returns NFS4_OK if the FSID is present on this server,
6677 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6678 * NFS4ERR code if some error occurred on the server, or a
6679 * negative errno if a local failure occurred.
6680 */
6681int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6682{
6683 struct nfs_server *server = NFS_SERVER(inode);
6684 struct nfs_client *clp = server->nfs_client;
6685 const struct nfs4_mig_recovery_ops *ops =
6686 clp->cl_mvops->mig_recovery_ops;
6687 struct nfs4_exception exception = { };
6688 int status;
6689
6690 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6691 (unsigned long long)server->fsid.major,
6692 (unsigned long long)server->fsid.minor,
6693 clp->cl_hostname);
6694 nfs_display_fhandle(NFS_FH(inode), __func__);
6695
6696 do {
6697 status = ops->fsid_present(inode, cred);
6698 if (status != -NFS4ERR_DELAY)
6699 break;
6700 nfs4_handle_exception(server, status, &exception);
6701 } while (exception.retry);
6702 return status;
6703}
6704
5ec16a85 6705/**
a5250def
WAA		 6706 * If 'use_integrity' is true and the state managment nfs_client
6707 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6708 * and the machine credential as per RFC3530bis and RFC5661 Security
6709 * Considerations sections. Otherwise, just use the user cred with the
6710 * filesystem's rpc_client.
5ec16a85 6711 */
a5250def 6712static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6713{
6714 int status;
6715 struct nfs4_secinfo_arg args = {
6716 .dir_fh = NFS_FH(dir),
6717 .name = name,
6718 };
6719 struct nfs4_secinfo_res res = {
6720 .flavors = flavors,
6721 };
6722 struct rpc_message msg = {
6723 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6724 .rpc_argp = &args,
6725 .rpc_resp = &res,
6726 };
a5250def 6727 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6728 struct rpc_cred *cred = NULL;
a5250def
WAA		 6729
6730 if (use_integrity) {
6731 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6732 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6733 msg.rpc_cred = cred;
a5250def 6734 }
5a5ea0d4
BS		 6735
6736 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6737
6738 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6739 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6740
a5250def
WAA		 6741 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6742 &res.seq_res, 0);
5a5ea0d4 6743 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6744
7cb852df
WAA		 6745 if (cred)
6746 put_rpccred(cred);
a5250def 6747
5a5ea0d4
BS		 6748 return status;
6749}
6750
72de53ec
BS		 6751int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6752 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6753{
6754 struct nfs4_exception exception = { };
6755 int err;
6756 do {
a5250def
WAA		 6757 err = -NFS4ERR_WRONGSEC;
6758
6759 /* try to use integrity protection with machine cred */
6760 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6761 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6762
6763 /*
6764 * if unable to use integrity protection, or SECINFO with
6765 * integrity protection returns NFS4ERR_WRONGSEC (which is
6766 * disallowed by spec, but exists in deployed servers) use
6767 * the current filesystem's rpc_client and the user cred.
6768 */
6769 if (err == -NFS4ERR_WRONGSEC)
6770 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6771
078ea3df
TM		 6772 trace_nfs4_secinfo(dir, name, err);
6773 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6774 &exception);
6775 } while (exception.retry);
6776 return err;
6777}
6778
557134a3 6779#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6780/*
6781 * Check the exchange flags returned by the server for invalid flags, having
6782 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6783 * DS flags set.
6784 */
6785static int nfs4_check_cl_exchange_flags(u32 flags)
6786{
6787 if (flags & ~EXCHGID4_FLAG_MASK_R)
6788 goto out_inval;
6789 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6790 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6791 goto out_inval;
6792 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6793 goto out_inval;
6794 return NFS_OK;
6795out_inval:
6796 return -NFS4ERR_INVAL;
6797}
6798
78fe0f41 6799static bool
79d4e1f0
CL		 6800nfs41_same_server_scope(struct nfs41_server_scope *a,
6801 struct nfs41_server_scope *b)
78fe0f41
WAA		 6802{
6803 if (a->server_scope_sz == b->server_scope_sz &&
6804 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6805 return true;
6806
6807 return false;
6808}
6809
02a95dee
AA		 6810static void
6811nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
6812{
6813}
6814
6815static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
6816 .rpc_call_done = &nfs4_bind_one_conn_to_session_done,
6817};
6818
7c44f1ae 6819/*
d9ddbf5d 6820 * nfs4_proc_bind_one_conn_to_session()
7c44f1ae
WAA		 6821 *
6822 * The 4.1 client currently uses the same TCP connection for the
6823 * fore and backchannel.
6824 */
d9ddbf5d
TM		 6825static
6826int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
6827 struct rpc_xprt *xprt,
6828 struct nfs_client *clp,
6829 struct rpc_cred *cred)
7c44f1ae
WAA		 6830{
6831 int status;
71a097c6
TM		 6832 struct nfs41_bind_conn_to_session_args args = {
6833 .client = clp,
6834 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6835 };
7c44f1ae
WAA		 6836 struct nfs41_bind_conn_to_session_res res;
6837 struct rpc_message msg = {
6838 .rpc_proc =
6839 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 6840 .rpc_argp = &args,
7c44f1ae 6841 .rpc_resp = &res,
2cf047c9 6842 .rpc_cred = cred,
7c44f1ae 6843 };
d9ddbf5d
TM		 6844 struct rpc_task_setup task_setup_data = {
6845 .rpc_client = clnt,
6846 .rpc_xprt = xprt,
02a95dee 6847 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
d9ddbf5d
TM		 6848 .rpc_message = &msg,
6849 .flags = RPC_TASK_TIMEOUT,
6850 };
6851 struct rpc_task *task;
7c44f1ae
WAA		 6852
6853 dprintk("--> %s\n", __func__);
7c44f1ae 6854
71a097c6
TM		 6855 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6856 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6857 args.dir = NFS4_CDFC4_FORE;
7c44f1ae 6858
d9ddbf5d
TM		 6859 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
6860 if (xprt != rcu_access_pointer(clnt->cl_xprt))
6861 args.dir = NFS4_CDFC4_FORE;
6862
6863 task = rpc_run_task(&task_setup_data);
6864 if (!IS_ERR(task)) {
6865 status = task->tk_status;
6866 rpc_put_task(task);
6867 } else
6868 status = PTR_ERR(task);
c6d01c6f 6869 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 6870 if (status == 0) {
71a097c6 6871 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 6872 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6873 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6874 status = -EIO;
71a097c6 6875 goto out;
7c44f1ae 6876 }
71a097c6 6877 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 6878 dprintk("NFS: %s: Unexpected direction from server\n",
6879 __func__);
6880 status = -EIO;
71a097c6 6881 goto out;
7c44f1ae 6882 }
71a097c6 6883 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 6884 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6885 __func__);
6886 status = -EIO;
71a097c6 6887 goto out;
7c44f1ae
WAA		 6888 }
6889 }
7c44f1ae
WAA		 6890out:
6891 dprintk("<-- %s status= %d\n", __func__, status);
6892 return status;
6893}
6894
d9ddbf5d
TM		 6895struct rpc_bind_conn_calldata {
6896 struct nfs_client *clp;
6897 struct rpc_cred *cred;
6898};
6899
6900static int
6901nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
6902 struct rpc_xprt *xprt,
6903 void *calldata)
6904{
6905 struct rpc_bind_conn_calldata *p = calldata;
6906
6907 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
6908}
6909
6910int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
6911{
6912 struct rpc_bind_conn_calldata data = {
6913 .clp = clp,
6914 .cred = cred,
6915 };
6916 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
6917 nfs4_proc_bind_conn_to_session_callback, &data);
6918}
6919
99fe60d0 6920/*
fa940720
WAA		 6921 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6922 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6923 */
6924static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6925 .how = SP4_MACH_CRED,
6926 .enforce.u.words = {
6927 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6928 1 << (OP_EXCHANGE_ID - 32) |
6929 1 << (OP_CREATE_SESSION - 32) |
6930 1 << (OP_DESTROY_SESSION - 32) |
6931 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6932 },
6933 .allow.u.words = {
6934 [0] = 1 << (OP_CLOSE) |
99ade3c7 6935 1 << (OP_OPEN_DOWNGRADE) |
a0279625 6936 1 << (OP_LOCKU) |
99ade3c7 6937 1 << (OP_DELEGRETURN) |
a0279625 6938 1 << (OP_COMMIT),
8b5bee2e 6939 [1] = 1 << (OP_SECINFO - 32) |
3787d506 6940 1 << (OP_SECINFO_NO_NAME - 32) |
99ade3c7 6941 1 << (OP_LAYOUTRETURN - 32) |
3787d506 6942 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6943 1 << (OP_FREE_STATEID - 32) |
6944 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6945 }
6946};
6947
6948/*
6949 * Select the state protection mode for client `clp' given the server results
6950 * from exchange_id in `sp'.
99fe60d0 6951 *
2031cd1a
WAA		 6952 * Returns 0 on success, negative errno otherwise.
6953 */
6954static int nfs4_sp4_select_mode(struct nfs_client *clp,
6955 struct nfs41_state_protection *sp)
6956{
6957 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6958 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6959 1 << (OP_EXCHANGE_ID - 32) |
6960 1 << (OP_CREATE_SESSION - 32) |
6961 1 << (OP_DESTROY_SESSION - 32) |
6962 1 << (OP_DESTROY_CLIENTID - 32)
6963 };
6964 unsigned int i;
6965
6966 if (sp->how == SP4_MACH_CRED) {
6967 /* Print state protect result */
6968 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6969 for (i = 0; i <= LAST_NFS4_OP; i++) {
6970 if (test_bit(i, sp->enforce.u.longs))
6971 dfprintk(MOUNT, " enforce op %d\n", i);
6972 if (test_bit(i, sp->allow.u.longs))
6973 dfprintk(MOUNT, " allow op %d\n", i);
6974 }
6975
6976 /* make sure nothing is on enforce list that isn't supported */
6977 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6978 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6979 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6980 return -EINVAL;
6981 }
6982 }
6983
6984 /*
6985 * Minimal mode - state operations are allowed to use machine
6986 * credential. Note this already happens by default, so the
6987 * client doesn't have to do anything more than the negotiation.
6988 *
6989 * NOTE: we don't care if EXCHANGE_ID is in the list -
6990 * we're already using the machine cred for exchange_id
6991 * and will never use a different cred.
6992 */
6993 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6994 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6995 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6996 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6997 dfprintk(MOUNT, "sp4_mach_cred:\n");
6998 dfprintk(MOUNT, " minimal mode enabled\n");
6999 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
7000 } else {
7001 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7002 return -EINVAL;
7003 }
fa940720
WAA		 7004
7005 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
99ade3c7
AE		 7006 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
7007 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
fa940720
WAA		 7008 test_bit(OP_LOCKU, sp->allow.u.longs)) {
7009 dfprintk(MOUNT, " cleanup mode enabled\n");
7010 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
7011 }
8b5bee2e 7012
99ade3c7
AE		 7013 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
7014 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
7015 set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP,
7016 &clp->cl_sp4_flags);
7017 }
7018
8b5bee2e
WAA		 7019 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
7020 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
7021 dfprintk(MOUNT, " secinfo mode enabled\n");
7022 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
7023 }
3787d506
WAA		 7024
7025 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
7026 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
7027 dfprintk(MOUNT, " stateid mode enabled\n");
7028 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
7029 }
8c21c62c
WAA		 7030
7031 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
7032 dfprintk(MOUNT, " write mode enabled\n");
7033 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
7034 }
7035
7036 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
7037 dfprintk(MOUNT, " commit mode enabled\n");
7038 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
7039 }
2031cd1a
WAA		 7040 }
7041
7042 return 0;
7043}
7044
7045/*
7046 * _nfs4_proc_exchange_id()
6bbb4ae8 7047 *
2031cd1a 7048 * Wrapper for EXCHANGE_ID operation.
99fe60d0 7049 */
2031cd1a
WAA		 7050static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
7051 u32 sp4_how)
99fe60d0
BH		 7052{
7053 nfs4_verifier verifier;
7054 struct nfs41_exchange_id_args args = {
cd93710e 7055 .verifier = &verifier,
99fe60d0 7056 .client = clp,
cd3fadec 7057#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 7058 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 7059 EXCHGID4_FLAG_BIND_PRINC_STATEID |
7060 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
7061#else
7062 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7063 EXCHGID4_FLAG_BIND_PRINC_STATEID,
7064#endif
99fe60d0
BH		 7065 };
7066 struct nfs41_exchange_id_res res = {
32b01310 7067 0
99fe60d0
BH		 7068 };
7069 int status;
7070 struct rpc_message msg = {
7071 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
7072 .rpc_argp = &args,
7073 .rpc_resp = &res,
7074 .rpc_cred = cred,
7075 };
99fe60d0 7076
f092075d 7077 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 7078
7079 status = nfs4_init_uniform_client_string(clp);
7080 if (status)
3a6bb738 7081 goto out;
3a6bb738
JL		 7082
7083 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6bbb4ae8 7084 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 7085 clp->cl_owner_id);
99fe60d0 7086
acdeb69d 7087 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 7088 GFP_NOFS);
acdeb69d 7089 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 7090 status = -ENOMEM;
7091 goto out;
7092 }
78fe0f41 7093
79d4e1f0 7094 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 7095 GFP_NOFS);
177313f1 7096 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 7097 status = -ENOMEM;
acdeb69d 7098 goto out_server_owner;
abe9a6d5 7099 }
78fe0f41 7100
bbafffd2 7101 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 7102 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 7103 status = -ENOMEM;
7104 goto out_server_scope;
7105 }
7106
2031cd1a
WAA		 7107 switch (sp4_how) {
7108 case SP4_NONE:
7109 args.state_protect.how = SP4_NONE;
7110 break;
7111
7112 case SP4_MACH_CRED:
7113 args.state_protect = nfs4_sp4_mach_cred_request;
7114 break;
7115
7116 default:
7117 /* unsupported! */
7118 WARN_ON_ONCE(1);
7119 status = -EINVAL;
6b55970b 7120 goto out_impl_id;
2031cd1a
WAA		 7121 }
7122
1bd714f2 7123 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7124 trace_nfs4_exchange_id(clp, status);
177313f1 7125 if (status == 0)
32b01310 7126 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 7127
2031cd1a
WAA		 7128 if (status == 0)
7129 status = nfs4_sp4_select_mode(clp, &res.state_protect);
7130
acdeb69d 7131 if (status == 0) {
32b01310 7132 clp->cl_clientid = res.clientid;
e11259f9
TM		 7133 clp->cl_exchange_flags = res.flags;
7134 /* Client ID is not confirmed */
7135 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7136 clear_bit(NFS4_SESSION_ESTABLISHED,
7137 &clp->cl_session->session_state);
32b01310 7138 clp->cl_seqid = res.seqid;
e11259f9 7139 }
32b01310 7140
acdeb69d
CL		 7141 kfree(clp->cl_serverowner);
7142 clp->cl_serverowner = res.server_owner;
7143 res.server_owner = NULL;
78fe0f41 7144
7d2ed9ac 7145 /* use the most recent implementation id */
59155546
CL		 7146 kfree(clp->cl_implid);
7147 clp->cl_implid = res.impl_id;
6b55970b 7148 res.impl_id = NULL;
7d2ed9ac 7149
177313f1 7150 if (clp->cl_serverscope != NULL &&
79d4e1f0 7151 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 7152 res.server_scope)) {
7153 dprintk("%s: server_scope mismatch detected\n",
7154 __func__);
7155 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 7156 kfree(clp->cl_serverscope);
7157 clp->cl_serverscope = NULL;
78fe0f41
WAA		 7158 }
7159
177313f1 7160 if (clp->cl_serverscope == NULL) {
79d4e1f0 7161 clp->cl_serverscope = res.server_scope;
6b55970b 7162 res.server_scope = NULL;
abe9a6d5 7163 }
6b55970b 7164 }
7d2ed9ac 7165
6b55970b
KM		 7166out_impl_id:
7167 kfree(res.impl_id);
7d2ed9ac 7168out_server_scope:
abe9a6d5 7169 kfree(res.server_scope);
6b55970b
KM		 7170out_server_owner:
7171 kfree(res.server_owner);
abe9a6d5 7172out:
177313f1 7173 if (clp->cl_implid != NULL)
6bbb4ae8 7174 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 7175 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 7176 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 7177 clp->cl_implid->date.seconds,
7178 clp->cl_implid->date.nseconds);
6bbb4ae8 7179 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 7180 return status;
7181}
7182
2031cd1a
WAA		 7183/*
7184 * nfs4_proc_exchange_id()
7185 *
7186 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7187 *
7188 * Since the clientid has expired, all compounds using sessions
7189 * associated with the stale clientid will be returning
7190 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7191 * be in some phase of session reset.
7192 *
7193 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7194 */
7195int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7196{
7197 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7198 int status;
7199
7200 /* try SP4_MACH_CRED if krb5i/p */
7201 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7202 authflavor == RPC_AUTH_GSS_KRB5P) {
7203 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
7204 if (!status)
7205 return 0;
7206 }
7207
7208 /* try SP4_NONE */
7209 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
7210}
7211
66245539
TM		 7212static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7213 struct rpc_cred *cred)
7214{
7215 struct rpc_message msg = {
7216 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7217 .rpc_argp = clp,
7218 .rpc_cred = cred,
7219 };
7220 int status;
7221
7222 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7223 trace_nfs4_destroy_clientid(clp, status);
66245539 7224 if (status)
02c67525 7225 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7226 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7227 return status;
7228}
7229
7230static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7231 struct rpc_cred *cred)
7232{
7233 unsigned int loop;
7234 int ret;
7235
7236 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7237 ret = _nfs4_proc_destroy_clientid(clp, cred);
7238 switch (ret) {
7239 case -NFS4ERR_DELAY:
7240 case -NFS4ERR_CLIENTID_BUSY:
7241 ssleep(1);
7242 break;
7243 default:
7244 return ret;
7245 }
7246 }
7247 return 0;
7248}
7249
7250int nfs4_destroy_clientid(struct nfs_client *clp)
7251{
7252 struct rpc_cred *cred;
7253 int ret = 0;
7254
7255 if (clp->cl_mvops->minor_version < 1)
7256 goto out;
7257 if (clp->cl_exchange_flags == 0)
7258 goto out;
05f4c350
CL		 7259 if (clp->cl_preserve_clid)
7260 goto out;
73d8bde5 7261 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7262 ret = nfs4_proc_destroy_clientid(clp, cred);
7263 if (cred)
7264 put_rpccred(cred);
7265 switch (ret) {
7266 case 0:
7267 case -NFS4ERR_STALE_CLIENTID:
7268 clp->cl_exchange_flags = 0;
7269 }
7270out:
7271 return ret;
7272}
7273
2050f0cc
AA		 7274struct nfs4_get_lease_time_data {
7275 struct nfs4_get_lease_time_args *args;
7276 struct nfs4_get_lease_time_res *res;
7277 struct nfs_client *clp;
7278};
7279
7280static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7281 void *calldata)
7282{
2050f0cc
AA		 7283 struct nfs4_get_lease_time_data *data =
7284 (struct nfs4_get_lease_time_data *)calldata;
7285
7286 dprintk("--> %s\n", __func__);
7287 /* just setup sequence, do not trigger session recovery
7288 since we're invoked within one */
d9afbd1b
TM		 7289 nfs41_setup_sequence(data->clp->cl_session,
7290 &data->args->la_seq_args,
7291 &data->res->lr_seq_res,
7292 task);
2050f0cc
AA		 7293 dprintk("<-- %s\n", __func__);
7294}
7295
7296/*
7297 * Called from nfs4_state_manager thread for session setup, so don't recover
7298 * from sequence operation or clientid errors.
7299 */
7300static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7301{
7302 struct nfs4_get_lease_time_data *data =
7303 (struct nfs4_get_lease_time_data *)calldata;
7304
7305 dprintk("--> %s\n", __func__);
14516c3a
TM		 7306 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7307 return;
2050f0cc
AA		 7308 switch (task->tk_status) {
7309 case -NFS4ERR_DELAY:
7310 case -NFS4ERR_GRACE:
7311 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7312 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7313 task->tk_status = 0;
a8a4ae3a
AA		 7314 /* fall through */
7315 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7316 rpc_restart_call_prepare(task);
2050f0cc
AA		 7317 return;
7318 }
2050f0cc
AA		 7319 dprintk("<-- %s\n", __func__);
7320}
7321
17280175 7322static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7323 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7324 .rpc_call_done = nfs4_get_lease_time_done,
7325};
7326
7327int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7328{
7329 struct rpc_task *task;
7330 struct nfs4_get_lease_time_args args;
7331 struct nfs4_get_lease_time_res res = {
7332 .lr_fsinfo = fsinfo,
7333 };
7334 struct nfs4_get_lease_time_data data = {
7335 .args = &args,
7336 .res = &res,
7337 .clp = clp,
7338 };
7339 struct rpc_message msg = {
7340 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7341 .rpc_argp = &args,
7342 .rpc_resp = &res,
7343 };
7344 struct rpc_task_setup task_setup = {
7345 .rpc_client = clp->cl_rpcclient,
7346 .rpc_message = &msg,
7347 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7348 .callback_data = &data,
7349 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7350 };
7351 int status;
7352
a9c92d6b 7353 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7354 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7355 dprintk("--> %s\n", __func__);
7356 task = rpc_run_task(&task_setup);
7357
7358 if (IS_ERR(task))
7359 status = PTR_ERR(task);
7360 else {
7361 status = task->tk_status;
7362 rpc_put_task(task);
7363 }
7364 dprintk("<-- %s return %d\n", __func__, status);
7365
7366 return status;
7367}
7368
fc931582
AA		 7369/*
7370 * Initialize the values to be used by the client in CREATE_SESSION
7371 * If nfs4_init_session set the fore channel request and response sizes,
7372 * use them.
7373 *
7374 * Set the back channel max_resp_sz_cached to zero to force the client to
7375 * always set csa_cachethis to FALSE because the current implementation
7376 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7377 */
6b26cc8c
CL		 7378static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
7379 struct rpc_clnt *clnt)
fc931582 7380{
18aad3d5 7381 unsigned int max_rqst_sz, max_resp_sz;
6b26cc8c 7382 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
18aad3d5
AA		 7383
7384 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7385 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7386
fc931582 7387 /* Fore channel attributes */
18aad3d5
AA		 7388 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7389 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7390 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7391 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7392
7393 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7394 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7395 __func__,
7396 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7397 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7398
7399 /* Back channel attributes */
6b26cc8c
CL		 7400 args->bc_attrs.max_rqst_sz = max_bc_payload;
7401 args->bc_attrs.max_resp_sz = max_bc_payload;
fc931582
AA		 7402 args->bc_attrs.max_resp_sz_cached = 0;
7403 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
f4f58ed1 7404 args->bc_attrs.max_reqs = NFS41_BC_MAX_CALLBACKS;
fc931582
AA		 7405
7406 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7407 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7408 __func__,
7409 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7410 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7411 args->bc_attrs.max_reqs);
7412}
7413
79969dd1
TM		 7414static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7415 struct nfs41_create_session_res *res)
8d35301d 7416{
43c2e885 7417 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7418 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7419
43c2e885
BF		 7420 if (rcvd->max_resp_sz > sent->max_resp_sz)
7421 return -EINVAL;
7422 /*
7423 * Our requested max_ops is the minimum we need; we're not
7424 * prepared to break up compounds into smaller pieces than that.
7425 * So, no point even trying to continue if the server won't
7426 * cooperate:
7427 */
7428 if (rcvd->max_ops < sent->max_ops)
7429 return -EINVAL;
7430 if (rcvd->max_reqs == 0)
7431 return -EINVAL;
b4b9a0c1
VG		 7432 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7433 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7434 return 0;
8d35301d
AA		 7435}
7436
79969dd1
TM		 7437static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7438 struct nfs41_create_session_res *res)
43c2e885
BF		 7439{
7440 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7441 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7442
b1c0df5f
TM		 7443 if (!(res->flags & SESSION4_BACK_CHAN))
7444 goto out;
43c2e885
BF		 7445 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7446 return -EINVAL;
7447 if (rcvd->max_resp_sz < sent->max_resp_sz)
7448 return -EINVAL;
7449 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7450 return -EINVAL;
7451 /* These would render the backchannel useless: */
b4b9a0c1 7452 if (rcvd->max_ops != sent->max_ops)
43c2e885 7453 return -EINVAL;
b4b9a0c1 7454 if (rcvd->max_reqs != sent->max_reqs)
43c2e885 7455 return -EINVAL;
b1c0df5f 7456out:
43c2e885
BF		 7457 return 0;
7458}
8d35301d 7459
8d35301d 7460static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7461 struct nfs41_create_session_res *res)
8d35301d 7462{
43c2e885 7463 int ret;
8d35301d 7464
79969dd1 7465 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7466 if (ret)
7467 return ret;
79969dd1
TM		 7468 return nfs4_verify_back_channel_attrs(args, res);
7469}
7470
7471static void nfs4_update_session(struct nfs4_session *session,
7472 struct nfs41_create_session_res *res)
7473{
7474 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7475 /* Mark client id and session as being confirmed */
7476 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7477 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7478 session->flags = res->flags;
7479 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7480 if (res->flags & SESSION4_BACK_CHAN)
7481 memcpy(&session->bc_attrs, &res->bc_attrs,
7482 sizeof(session->bc_attrs));
8d35301d
AA		 7483}
7484
848f5bda
TM		 7485static int _nfs4_proc_create_session(struct nfs_client *clp,
7486 struct rpc_cred *cred)
fc931582
AA		 7487{
7488 struct nfs4_session *session = clp->cl_session;
7489 struct nfs41_create_session_args args = {
7490 .client = clp,
79969dd1
TM		 7491 .clientid = clp->cl_clientid,
7492 .seqid = clp->cl_seqid,
fc931582
AA		 7493 .cb_program = NFS4_CALLBACK,
7494 };
79969dd1
TM		 7495 struct nfs41_create_session_res res;
7496
fc931582
AA		 7497 struct rpc_message msg = {
7498 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7499 .rpc_argp = &args,
7500 .rpc_resp = &res,
848f5bda 7501 .rpc_cred = cred,
fc931582
AA		 7502 };
7503 int status;
7504
6b26cc8c 7505 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
0f91421e 7506 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7507
1bd714f2 7508 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7509 trace_nfs4_create_session(clp, status);
fc931582 7510
43095d39 7511 if (!status) {
8d35301d 7512 /* Verify the session's negotiated channel_attrs values */
79969dd1 7513 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7514 /* Increment the clientid slot sequence id */
79969dd1
TM		 7515 if (clp->cl_seqid == res.seqid)
7516 clp->cl_seqid++;
7517 if (status)
7518 goto out;
7519 nfs4_update_session(session, &res);
fc931582 7520 }
79969dd1 7521out:
fc931582
AA		 7522 return status;
7523}
7524
7525/*
7526 * Issues a CREATE_SESSION operation to the server.
7527 * It is the responsibility of the caller to verify the session is
7528 * expired before calling this routine.
7529 */
848f5bda 7530int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7531{
7532 int status;
7533 unsigned *ptr;
fc931582
AA		 7534 struct nfs4_session *session = clp->cl_session;
7535
7536 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7537
848f5bda 7538 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7539 if (status)
7540 goto out;
7541
aacd5537
AA		 7542 /* Init or reset the session slot tables */
7543 status = nfs4_setup_session_slot_tables(session);
7544 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7545 if (status)
7546 goto out;
7547
7548 ptr = (unsigned *)&session->sess_id.data[0];
7549 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7550 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7551out:
7552 dprintk("<-- %s\n", __func__);
7553 return status;
7554}
7555
0f3e66c6
AA		 7556/*
7557 * Issue the over-the-wire RPC DESTROY_SESSION.
7558 * The caller must serialize access to this routine.
7559 */
848f5bda
TM		 7560int nfs4_proc_destroy_session(struct nfs4_session *session,
7561 struct rpc_cred *cred)
0f3e66c6 7562{
848f5bda
TM		 7563 struct rpc_message msg = {
7564 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7565 .rpc_argp = session,
7566 .rpc_cred = cred,
7567 };
0f3e66c6 7568 int status = 0;
0f3e66c6
AA		 7569
7570 dprintk("--> nfs4_proc_destroy_session\n");
7571
7572 /* session is still being setup */
e11259f9
TM		 7573 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7574 return 0;
0f3e66c6 7575
1bd714f2 7576 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7577 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7578
7579 if (status)
08106ac7 7580 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7581 "Session has been destroyed regardless...\n", status);
7582
7583 dprintk("<-- nfs4_proc_destroy_session\n");
7584 return status;
7585}
7586
fc01cea9
AA		 7587/*
7588 * Renew the cl_session lease.
7589 */
d5f8d3fe
TM		 7590struct nfs4_sequence_data {
7591 struct nfs_client *clp;
7592 struct nfs4_sequence_args args;
7593 struct nfs4_sequence_res res;
7594};
7595
dc96aef9
AB		 7596static void nfs41_sequence_release(void *data)
7597{
d5f8d3fe
TM		 7598 struct nfs4_sequence_data *calldata = data;
7599 struct nfs_client *clp = calldata->clp;
dc96aef9 7600
7135840f
AB		 7601 if (atomic_read(&clp->cl_count) > 1)
7602 nfs4_schedule_state_renewal(clp);
7603 nfs_put_client(clp);
d5f8d3fe 7604 kfree(calldata);
dc96aef9
AB		 7605}
7606
aa5190d0
TM		 7607static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7608{
7609 switch(task->tk_status) {
7610 case -NFS4ERR_DELAY:
aa5190d0
TM		 7611 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7612 return -EAGAIN;
7613 default:
0400a6b0 7614 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7615 }
7616 return 0;
7617}
7618
dc96aef9 7619static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7620{
d5f8d3fe
TM		 7621 struct nfs4_sequence_data *calldata = data;
7622 struct nfs_client *clp = calldata->clp;
fc01cea9 7623
14516c3a
TM		 7624 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7625 return;
fc01cea9 7626
c6d01c6f 7627 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7628 if (task->tk_status < 0) {
7629 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7630 if (atomic_read(&clp->cl_count) == 1)
7631 goto out;
fc01cea9 7632
aa5190d0
TM		 7633 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7634 rpc_restart_call_prepare(task);
fc01cea9
AA		 7635 return;
7636 }
7637 }
fc01cea9 7638 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7639out:
fc01cea9
AA		 7640 dprintk("<-- %s\n", __func__);
7641}
7642
7643static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7644{
d5f8d3fe
TM		 7645 struct nfs4_sequence_data *calldata = data;
7646 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7647 struct nfs4_sequence_args *args;
7648 struct nfs4_sequence_res *res;
7649
fc01cea9
AA		 7650 args = task->tk_msg.rpc_argp;
7651 res = task->tk_msg.rpc_resp;
7652
d9afbd1b 7653 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7654}
7655
7656static const struct rpc_call_ops nfs41_sequence_ops = {
7657 .rpc_call_done = nfs41_sequence_call_done,
7658 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7659 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7660};
7661
8fe72bac
TM		 7662static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7663 struct rpc_cred *cred,
7664 bool is_privileged)
fc01cea9 7665{
d5f8d3fe 7666 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7667 struct rpc_message msg = {
7668 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7669 .rpc_cred = cred,
7670 };
71ac6da9
TM		 7671 struct rpc_task_setup task_setup_data = {
7672 .rpc_client = clp->cl_rpcclient,
7673 .rpc_message = &msg,
8fe72bac 7674 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7675 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7676 };
fc01cea9 7677
7135840f 7678 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7679 return ERR_PTR(-EIO);
dfb4f309 7680 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7681 if (calldata == NULL) {
7135840f 7682 nfs_put_client(clp);
71ac6da9 7683 return ERR_PTR(-ENOMEM);
fc01cea9 7684 }
a9c92d6b 7685 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7686 if (is_privileged)
7687 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7688 msg.rpc_argp = &calldata->args;
7689 msg.rpc_resp = &calldata->res;
7690 calldata->clp = clp;
71ac6da9 7691 task_setup_data.callback_data = calldata;
fc01cea9 7692
71ac6da9
TM		 7693 return rpc_run_task(&task_setup_data);
7694}
7695
2f60ea6b 7696static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7697{
7698 struct rpc_task *task;
7699 int ret = 0;
7700
2f60ea6b 7701 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7702 return -EAGAIN;
8fe72bac 7703 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7704 if (IS_ERR(task))
7705 ret = PTR_ERR(task);
7706 else
bf294b41 7707 rpc_put_task_async(task);
71ac6da9
TM		 7708 dprintk("<-- %s status=%d\n", __func__, ret);
7709 return ret;
7710}
7711
7712static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7713{
7714 struct rpc_task *task;
7715 int ret;
7716
8fe72bac 7717 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7718 if (IS_ERR(task)) {
7719 ret = PTR_ERR(task);
7720 goto out;
7721 }
7722 ret = rpc_wait_for_completion_task(task);
be824167 7723 if (!ret)
71ac6da9
TM		 7724 ret = task->tk_status;
7725 rpc_put_task(task);
7726out:
7727 dprintk("<-- %s status=%d\n", __func__, ret);
7728 return ret;
fc01cea9
AA		 7729}
7730
fce5c838
RL		 7731struct nfs4_reclaim_complete_data {
7732 struct nfs_client *clp;
7733 struct nfs41_reclaim_complete_args arg;
7734 struct nfs41_reclaim_complete_res res;
7735};
7736
7737static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7738{
7739 struct nfs4_reclaim_complete_data *calldata = data;
7740
d9afbd1b
TM		 7741 nfs41_setup_sequence(calldata->clp->cl_session,
7742 &calldata->arg.seq_args,
7743 &calldata->res.seq_res,
7744 task);
fce5c838
RL		 7745}
7746
aa5190d0
TM		 7747static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7748{
7749 switch(task->tk_status) {
7750 case 0:
7751 case -NFS4ERR_COMPLETE_ALREADY:
7752 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7753 break;
7754 case -NFS4ERR_DELAY:
aa5190d0 7755 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7756 /* fall through */
7757 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7758 return -EAGAIN;
7759 default:
0400a6b0 7760 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7761 }
7762 return 0;
7763}
7764
fce5c838
RL		 7765static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7766{
7767 struct nfs4_reclaim_complete_data *calldata = data;
7768 struct nfs_client *clp = calldata->clp;
7769 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7770
7771 dprintk("--> %s\n", __func__);
14516c3a
TM		 7772 if (!nfs41_sequence_done(task, res))
7773 return;
fce5c838 7774
c6d01c6f 7775 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7776 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7777 rpc_restart_call_prepare(task);
7778 return;
7779 }
fce5c838
RL		 7780 dprintk("<-- %s\n", __func__);
7781}
7782
7783static void nfs4_free_reclaim_complete_data(void *data)
7784{
7785 struct nfs4_reclaim_complete_data *calldata = data;
7786
7787 kfree(calldata);
7788}
7789
7790static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7791 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7792 .rpc_call_done = nfs4_reclaim_complete_done,
7793 .rpc_release = nfs4_free_reclaim_complete_data,
7794};
7795
7796/*
7797 * Issue a global reclaim complete.
7798 */
965e9c23
TM		 7799static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7800 struct rpc_cred *cred)
fce5c838
RL		 7801{
7802 struct nfs4_reclaim_complete_data *calldata;
7803 struct rpc_task *task;
7804 struct rpc_message msg = {
7805 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7806 .rpc_cred = cred,
fce5c838
RL		 7807 };
7808 struct rpc_task_setup task_setup_data = {
7809 .rpc_client = clp->cl_rpcclient,
7810 .rpc_message = &msg,
7811 .callback_ops = &nfs4_reclaim_complete_call_ops,
7812 .flags = RPC_TASK_ASYNC,
7813 };
7814 int status = -ENOMEM;
7815
7816 dprintk("--> %s\n", __func__);
8535b2be 7817 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7818 if (calldata == NULL)
7819 goto out;
7820 calldata->clp = clp;
7821 calldata->arg.one_fs = 0;
fce5c838 7822
a9c92d6b 7823 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7824 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7825 msg.rpc_argp = &calldata->arg;
7826 msg.rpc_resp = &calldata->res;
7827 task_setup_data.callback_data = calldata;
7828 task = rpc_run_task(&task_setup_data);
acf82b85 7829 if (IS_ERR(task)) {
fce5c838 7830 status = PTR_ERR(task);
acf82b85
DC		 7831 goto out;
7832 }
c34c32ea
AA		 7833 status = nfs4_wait_for_completion_rpc_task(task);
7834 if (status == 0)
7835 status = task->tk_status;
fce5c838 7836 rpc_put_task(task);
acf82b85 7837 return 0;
fce5c838
RL		 7838out:
7839 dprintk("<-- %s status=%d\n", __func__, status);
7840 return status;
7841}
b1f69b75
AA		 7842
7843static void
7844nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7845{
7846 struct nfs4_layoutget *lgp = calldata;
c31663d4 7847 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7848 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7849
7850 dprintk("--> %s\n", __func__);
183d9e7b
JL		 7851 nfs41_setup_sequence(session, &lgp->args.seq_args,
7852 &lgp->res.seq_res, task);
7853 dprintk("<-- %s\n", __func__);
b1f69b75
AA		 7854}
7855
7856static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7857{
7858 struct nfs4_layoutget *lgp = calldata;
183d9e7b
JL		 7859
7860 dprintk("--> %s\n", __func__);
7861 nfs41_sequence_done(task, &lgp->res.seq_res);
7862 dprintk("<-- %s\n", __func__);
7863}
7864
7865static int
7866nfs4_layoutget_handle_exception(struct rpc_task *task,
7867 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
7868{
ee314c2a
TM		 7869 struct inode *inode = lgp->args.inode;
7870 struct nfs_server *server = NFS_SERVER(inode);
7871 struct pnfs_layout_hdr *lo;
183d9e7b 7872 int status = task->tk_status;
b1f69b75 7873
ed7e5423 7874 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7875
183d9e7b 7876 switch (status) {
b1f69b75 7877 case 0:
ee314c2a 7878 goto out;
7c1e6e58
PT		 7879
7880 /*
7881 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
7882 * on the file. set tk_status to -ENODATA to tell upper layer to
7883 * retry go inband.
7884 */
7885 case -NFS4ERR_LAYOUTUNAVAILABLE:
183d9e7b 7886 status = -ENODATA;
7c1e6e58 7887 goto out;
21b874c8
TM		 7888 /*
7889 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
7890 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
7891 */
7892 case -NFS4ERR_BADLAYOUT:
183d9e7b
JL		 7893 status = -EOVERFLOW;
7894 goto out;
ed7e5423
BH		 7895 /*
7896 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
21b874c8
TM		 7897 * (or clients) writing to the same RAID stripe except when
7898 * the minlength argument is 0 (see RFC5661 section 18.43.3).
183d9e7b
JL		 7899 *
7900 * Treat it like we would RECALLCONFLICT -- we retry for a little
7901 * while, and then eventually give up.
ed7e5423 7902 */
b1f69b75 7903 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b
JL		 7904 if (lgp->args.minlength == 0) {
7905 status = -EOVERFLOW;
7906 goto out;
ed7e5423 7907 }
183d9e7b
JL		 7908 /* Fallthrough */
7909 case -NFS4ERR_RECALLCONFLICT:
7910 nfs4_handle_exception(server, -NFS4ERR_RECALLCONFLICT,
7911 exception);
7912 status = -ERECALLCONFLICT;
7913 goto out;
ee314c2a
TM		 7914 case -NFS4ERR_EXPIRED:
7915 case -NFS4ERR_BAD_STATEID:
183d9e7b 7916 exception->timeout = 0;
ee314c2a 7917 spin_lock(&inode->i_lock);
2259f960
TM		 7918 if (nfs4_stateid_match(&lgp->args.stateid,
7919 &lgp->args.ctx->state->stateid)) {
ee314c2a
TM		 7920 spin_unlock(&inode->i_lock);
7921 /* If the open stateid was bad, then recover it. */
183d9e7b 7922 exception->state = lgp->args.ctx->state;
2259f960
TM		 7923 break;
7924 }
7925 lo = NFS_I(inode)->layout;
dd1beb3d
TM		 7926 if (lo && !test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) &&
7927 nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) {
ee314c2a
TM		 7928 LIST_HEAD(head);
7929
defb8460
CH		 7930 /*
7931 * Mark the bad layout state as invalid, then retry
7932 * with the current stateid.
7933 */
8714d46d 7934 set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);
6d597e17 7935 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL, 0);
ee314c2a 7936 spin_unlock(&inode->i_lock);
ee314c2a 7937 pnfs_free_lseg_list(&head);
dd1beb3d
TM		 7938 status = -EAGAIN;
7939 goto out;
2259f960
TM		 7940 } else
7941 spin_unlock(&inode->i_lock);
b1f69b75 7942 }
183d9e7b
JL		 7943
7944 status = nfs4_handle_exception(server, status, exception);
7945 if (exception->retry)
7946 status = -EAGAIN;
ee314c2a 7947out:
b1f69b75 7948 dprintk("<-- %s\n", __func__);
183d9e7b 7949 return status;
b1f69b75
AA		 7950}
7951
8554116e
IK		 7952static size_t max_response_pages(struct nfs_server *server)
7953{
7954 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7955 return nfs_page_array_len(0, max_resp_sz);
7956}
7957
7958static void nfs4_free_pages(struct page **pages, size_t size)
7959{
7960 int i;
7961
7962 if (!pages)
7963 return;
7964
7965 for (i = 0; i < size; i++) {
7966 if (!pages[i])
7967 break;
7968 __free_page(pages[i]);
7969 }
7970 kfree(pages);
7971}
7972
7973static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7974{
7975 struct page **pages;
7976 int i;
7977
7978 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7979 if (!pages) {
7980 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7981 return NULL;
7982 }
7983
7984 for (i = 0; i < size; i++) {
7985 pages[i] = alloc_page(gfp_flags);
7986 if (!pages[i]) {
7987 dprintk("%s: failed to allocate page\n", __func__);
7988 nfs4_free_pages(pages, size);
7989 return NULL;
7990 }
7991 }
7992
7993 return pages;
7994}
7995
b1f69b75
AA		 7996static void nfs4_layoutget_release(void *calldata)
7997{
7998 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7999 struct inode *inode = lgp->args.inode;
8000 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8001 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8002
8003 dprintk("--> %s\n", __func__);
8554116e 8004 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 8005 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 8006 put_nfs_open_context(lgp->args.ctx);
8007 kfree(calldata);
8008 dprintk("<-- %s\n", __func__);
8009}
8010
8011static const struct rpc_call_ops nfs4_layoutget_call_ops = {
8012 .rpc_call_prepare = nfs4_layoutget_prepare,
8013 .rpc_call_done = nfs4_layoutget_done,
8014 .rpc_release = nfs4_layoutget_release,
8015};
8016
a0b0a6e3 8017struct pnfs_layout_segment *
183d9e7b 8018nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags)
b1f69b75 8019{
a47970ff
WAA		 8020 struct inode *inode = lgp->args.inode;
8021 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8022 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8023 struct rpc_task *task;
8024 struct rpc_message msg = {
8025 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
8026 .rpc_argp = &lgp->args,
8027 .rpc_resp = &lgp->res,
6ab59344 8028 .rpc_cred = lgp->cred,
b1f69b75
AA		 8029 };
8030 struct rpc_task_setup task_setup_data = {
8031 .rpc_client = server->client,
8032 .rpc_message = &msg,
8033 .callback_ops = &nfs4_layoutget_call_ops,
8034 .callback_data = lgp,
8035 .flags = RPC_TASK_ASYNC,
8036 };
a0b0a6e3 8037 struct pnfs_layout_segment *lseg = NULL;
bc23676c
TM		 8038 struct nfs4_exception exception = {
8039 .inode = inode,
8040 .timeout = *timeout,
8041 };
b1f69b75
AA		 8042 int status = 0;
8043
8044 dprintk("--> %s\n", __func__);
8045
4bd5a980
PT		 8046 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
8047 pnfs_get_layout_hdr(NFS_I(inode)->layout);
8048
8554116e
IK		 8049 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
8050 if (!lgp->args.layout.pages) {
8051 nfs4_layoutget_release(lgp);
a0b0a6e3 8052 return ERR_PTR(-ENOMEM);
8554116e
IK		 8053 }
8054 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
8055
35124a09 8056 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 8057 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 8058 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 8059
b1f69b75
AA		 8060 task = rpc_run_task(&task_setup_data);
8061 if (IS_ERR(task))
a0b0a6e3 8062 return ERR_CAST(task);
b1f69b75 8063 status = nfs4_wait_for_completion_rpc_task(task);
183d9e7b
JL		 8064 if (status == 0) {
8065 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
8066 *timeout = exception.timeout;
8067 }
8068
1037e6ea
TM		 8069 trace_nfs4_layoutget(lgp->args.ctx,
8070 &lgp->args.range,
8071 &lgp->res.range,
48c9579a 8072 &lgp->res.stateid,
1037e6ea 8073 status);
183d9e7b 8074
085b7a45
WAA		 8075 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8076 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 8077 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 8078 rpc_put_task(task);
8079 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 8080 if (status)
8081 return ERR_PTR(status);
8082 return lseg;
b1f69b75
AA		 8083}
8084
cbe82603
BH		 8085static void
8086nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8087{
8088 struct nfs4_layoutreturn *lrp = calldata;
8089
8090 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 8091 nfs41_setup_sequence(lrp->clp->cl_session,
8092 &lrp->args.seq_args,
8093 &lrp->res.seq_res,
8094 task);
cbe82603
BH		 8095}
8096
8097static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8098{
8099 struct nfs4_layoutreturn *lrp = calldata;
8100 struct nfs_server *server;
8101
8102 dprintk("--> %s\n", __func__);
8103
6ba7db34 8104 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 8105 return;
8106
8107 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 8108 switch (task->tk_status) {
8109 default:
8110 task->tk_status = 0;
8111 case 0:
8112 break;
8113 case -NFS4ERR_DELAY:
8478eaa1 8114 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 8115 break;
d00c5d43 8116 rpc_restart_call_prepare(task);
cbe82603
BH		 8117 return;
8118 }
cbe82603
BH		 8119 dprintk("<-- %s\n", __func__);
8120}
8121
8122static void nfs4_layoutreturn_release(void *calldata)
8123{
8124 struct nfs4_layoutreturn *lrp = calldata;
849b286f 8125 struct pnfs_layout_hdr *lo = lrp->args.layout;
c5d73716 8126 LIST_HEAD(freeme);
cbe82603
BH		 8127
8128 dprintk("--> %s\n", __func__);
849b286f 8129 spin_lock(&lo->plh_inode->i_lock);
6d597e17
JL		 8130 pnfs_mark_matching_lsegs_invalid(lo, &freeme, &lrp->args.range,
8131 be32_to_cpu(lrp->args.stateid.seqid));
0654cc72 8132 pnfs_mark_layout_returned_if_empty(lo);
849b286f
TM		 8133 if (lrp->res.lrs_present)
8134 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
d67ae825 8135 pnfs_clear_layoutreturn_waitbit(lo);
849b286f 8136 spin_unlock(&lo->plh_inode->i_lock);
c5d73716 8137 pnfs_free_lseg_list(&freeme);
70c3bd2b 8138 pnfs_put_layout_hdr(lrp->args.layout);
5a0ec8ac 8139 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 8140 kfree(calldata);
8141 dprintk("<-- %s\n", __func__);
8142}
8143
8144static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8145 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8146 .rpc_call_done = nfs4_layoutreturn_done,
8147 .rpc_release = nfs4_layoutreturn_release,
8148};
8149
6c16605d 8150int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 8151{
8152 struct rpc_task *task;
8153 struct rpc_message msg = {
8154 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8155 .rpc_argp = &lrp->args,
8156 .rpc_resp = &lrp->res,
9556000d 8157 .rpc_cred = lrp->cred,
cbe82603
BH		 8158 };
8159 struct rpc_task_setup task_setup_data = {
1771c577 8160 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8161 .rpc_message = &msg,
8162 .callback_ops = &nfs4_layoutreturn_call_ops,
8163 .callback_data = lrp,
8164 };
6c16605d 8165 int status = 0;
cbe82603 8166
99ade3c7
AE		 8167 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
8168 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
8169 &task_setup_data.rpc_client, &msg);
8170
cbe82603 8171 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8172 if (!sync) {
8173 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8174 if (!lrp->inode) {
8175 nfs4_layoutreturn_release(lrp);
8176 return -EAGAIN;
8177 }
8178 task_setup_data.flags |= RPC_TASK_ASYNC;
8179 }
a9c92d6b 8180 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8181 task = rpc_run_task(&task_setup_data);
8182 if (IS_ERR(task))
8183 return PTR_ERR(task);
5a0ec8ac
TM		 8184 if (sync)
8185 status = task->tk_status;
48c9579a 8186 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
cbe82603
BH		 8187 dprintk("<-- %s status=%d\n", __func__, status);
8188 rpc_put_task(task);
8189 return status;
8190}
8191
b1f69b75 8192static int
cd5875fe
TM		 8193_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8194 struct pnfs_device *pdev,
8195 struct rpc_cred *cred)
b1f69b75
AA		 8196{
8197 struct nfs4_getdeviceinfo_args args = {
8198 .pdev = pdev,
4e590803
TM		 8199 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8200 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8201 };
8202 struct nfs4_getdeviceinfo_res res = {
8203 .pdev = pdev,
8204 };
8205 struct rpc_message msg = {
8206 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8207 .rpc_argp = &args,
8208 .rpc_resp = &res,
cd5875fe 8209 .rpc_cred = cred,
b1f69b75
AA		 8210 };
8211 int status;
8212
8213 dprintk("--> %s\n", __func__);
7c513058 8214 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8215 if (res.notification & ~args.notify_types)
8216 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8217 if (res.notification != args.notify_types)
8218 pdev->nocache = 1;
4e590803 8219
b1f69b75
AA		 8220 dprintk("<-- %s status=%d\n", __func__, status);
8221
8222 return status;
8223}
8224
cd5875fe
TM		 8225int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8226 struct pnfs_device *pdev,
8227 struct rpc_cred *cred)
b1f69b75
AA		 8228{
8229 struct nfs4_exception exception = { };
8230 int err;
8231
8232 do {
8233 err = nfs4_handle_exception(server,
cd5875fe 8234 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8235 &exception);
8236 } while (exception.retry);
8237 return err;
8238}
8239EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8240
863a3c6c
AA		 8241static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8242{
8243 struct nfs4_layoutcommit_data *data = calldata;
8244 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 8245 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 8246
d9afbd1b
TM		 8247 nfs41_setup_sequence(session,
8248 &data->args.seq_args,
8249 &data->res.seq_res,
8250 task);
863a3c6c
AA		 8251}
8252
8253static void
8254nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8255{
8256 struct nfs4_layoutcommit_data *data = calldata;
8257 struct nfs_server *server = NFS_SERVER(data->args.inode);
8258
6ba7db34 8259 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8260 return;
8261
8262 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8263 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8264 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8265 case -NFS4ERR_BADLAYOUT: /* no layout */
8266 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8267 task->tk_status = 0;
e59d27e0 8268 case 0:
e59d27e0
TM		 8269 break;
8270 default:
8478eaa1 8271 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8272 rpc_restart_call_prepare(task);
8273 return;
8274 }
8275 }
863a3c6c
AA		 8276}
8277
8278static void nfs4_layoutcommit_release(void *calldata)
8279{
8280 struct nfs4_layoutcommit_data *data = calldata;
8281
db29c089 8282 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8283 nfs_post_op_update_inode_force_wcc(data->args.inode,
8284 data->res.fattr);
863a3c6c 8285 put_rpccred(data->cred);
472e2594 8286 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8287 kfree(data);
8288}
8289
8290static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8291 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8292 .rpc_call_done = nfs4_layoutcommit_done,
8293 .rpc_release = nfs4_layoutcommit_release,
8294};
8295
8296int
ef311537 8297nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8298{
8299 struct rpc_message msg = {
8300 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8301 .rpc_argp = &data->args,
8302 .rpc_resp = &data->res,
8303 .rpc_cred = data->cred,
8304 };
8305 struct rpc_task_setup task_setup_data = {
8306 .task = &data->task,
8307 .rpc_client = NFS_CLIENT(data->args.inode),
8308 .rpc_message = &msg,
8309 .callback_ops = &nfs4_layoutcommit_ops,
8310 .callback_data = data,
863a3c6c
AA		 8311 };
8312 struct rpc_task *task;
8313 int status = 0;
8314
b4839ebe
KM		 8315 dprintk("NFS: initiating layoutcommit call. sync %d "
8316 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8317 data->args.lastbytewritten,
8318 data->args.inode->i_ino);
8319
472e2594
TM		 8320 if (!sync) {
8321 data->inode = nfs_igrab_and_active(data->args.inode);
8322 if (data->inode == NULL) {
8323 nfs4_layoutcommit_release(data);
8324 return -EAGAIN;
8325 }
8326 task_setup_data.flags = RPC_TASK_ASYNC;
8327 }
a9c92d6b 8328 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8329 task = rpc_run_task(&task_setup_data);
8330 if (IS_ERR(task))
8331 return PTR_ERR(task);
472e2594
TM		 8332 if (sync)
8333 status = task->tk_status;
48c9579a 8334 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
863a3c6c
AA		 8335 dprintk("%s: status %d\n", __func__, status);
8336 rpc_put_task(task);
8337 return status;
8338}
fca78d6d 8339
97431204
AA		 8340/**
8341 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8342 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8343 */
fca78d6d
BS		 8344static int
8345_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8346 struct nfs_fsinfo *info,
8347 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8348{
8349 struct nfs41_secinfo_no_name_args args = {
8350 .style = SECINFO_STYLE_CURRENT_FH,
8351 };
8352 struct nfs4_secinfo_res res = {
8353 .flavors = flavors,
8354 };
8355 struct rpc_message msg = {
8356 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8357 .rpc_argp = &args,
8358 .rpc_resp = &res,
8359 };
b1b3e136 8360 struct rpc_clnt *clnt = server->client;
7cb852df 8361 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8362 int status;
8363
8364 if (use_integrity) {
8365 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8366 cred = nfs4_get_clid_cred(server->nfs_client);
8367 msg.rpc_cred = cred;
b1b3e136
WAA		 8368 }
8369
8370 dprintk("--> %s\n", __func__);
8371 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8372 &res.seq_res, 0);
8373 dprintk("<-- %s status=%d\n", __func__, status);
8374
7cb852df
WAA		 8375 if (cred)
8376 put_rpccred(cred);
b1b3e136
WAA		 8377
8378 return status;
fca78d6d
BS		 8379}
8380
8381static int
8382nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8383 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8384{
8385 struct nfs4_exception exception = { };
8386 int err;
8387 do {
b1b3e136
WAA		 8388 /* first try using integrity protection */
8389 err = -NFS4ERR_WRONGSEC;
8390
8391 /* try to use integrity protection with machine cred */
8392 if (_nfs4_is_integrity_protected(server->nfs_client))
8393 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8394 flavors, true);
8395
8396 /*
8397 * if unable to use integrity protection, or SECINFO with
8398 * integrity protection returns NFS4ERR_WRONGSEC (which is
8399 * disallowed by spec, but exists in deployed servers) use
8400 * the current filesystem's rpc_client and the user cred.
8401 */
8402 if (err == -NFS4ERR_WRONGSEC)
8403 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8404 flavors, false);
8405
fca78d6d
BS		 8406 switch (err) {
8407 case 0:
8408 case -NFS4ERR_WRONGSEC:
78b19bae 8409 case -ENOTSUPP:
05e9cfb4 8410 goto out;
fca78d6d
BS		 8411 default:
8412 err = nfs4_handle_exception(server, err, &exception);
8413 }
8414 } while (exception.retry);
05e9cfb4 8415out:
fca78d6d
BS		 8416 return err;
8417}
8418
8419static int
8420nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8421 struct nfs_fsinfo *info)
8422{
8423 int err;
8424 struct page *page;
367156d9 8425 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8426 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8427 struct nfs4_secinfo4 *secinfo;
8428 int i;
fca78d6d
BS		 8429
8430 page = alloc_page(GFP_KERNEL);
8431 if (!page) {
8432 err = -ENOMEM;
8433 goto out;
8434 }
8435
8436 flavors = page_address(page);
8437 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8438
8439 /*
8440 * Fall back on "guess and check" method if
8441 * the server doesn't support SECINFO_NO_NAME
8442 */
78b19bae 8443 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8444 err = nfs4_find_root_sec(server, fhandle, info);
8445 goto out_freepage;
8446 }
8447 if (err)
8448 goto out_freepage;
8449
58a8cf12
WAA		 8450 for (i = 0; i < flavors->num_flavors; i++) {
8451 secinfo = &flavors->flavors[i];
8452
8453 switch (secinfo->flavor) {
8454 case RPC_AUTH_NULL:
8455 case RPC_AUTH_UNIX:
8456 case RPC_AUTH_GSS:
8457 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8458 &secinfo->flavor_info);
8459 break;
8460 default:
8461 flavor = RPC_AUTH_MAXFLAVOR;
8462 break;
8463 }
8464
4d4b69dd
WAA		 8465 if (!nfs_auth_info_match(&server->auth_info, flavor))
8466 flavor = RPC_AUTH_MAXFLAVOR;
8467
58a8cf12
WAA		 8468 if (flavor != RPC_AUTH_MAXFLAVOR) {
8469 err = nfs4_lookup_root_sec(server, fhandle,
8470 info, flavor);
8471 if (!err)
8472 break;
8473 }
8474 }
8475
8476 if (flavor == RPC_AUTH_MAXFLAVOR)
8477 err = -EPERM;
fca78d6d
BS		 8478
8479out_freepage:
8480 put_page(page);
8481 if (err == -EACCES)
8482 return -EPERM;
8483out:
8484 return err;
8485}
1cab0652 8486
ab7cb0df
TM		 8487static int _nfs41_test_stateid(struct nfs_server *server,
8488 nfs4_stateid *stateid,
8489 struct rpc_cred *cred)
7d974794
BS		 8490{
8491 int status;
8492 struct nfs41_test_stateid_args args = {
1cab0652 8493 .stateid = stateid,
7d974794
BS		 8494 };
8495 struct nfs41_test_stateid_res res;
8496 struct rpc_message msg = {
8497 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8498 .rpc_argp = &args,
8499 .rpc_resp = &res,
ab7cb0df 8500 .rpc_cred = cred,
7d974794 8501 };
3787d506
WAA		 8502 struct rpc_clnt *rpc_client = server->client;
8503
8504 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8505 &rpc_client, &msg);
1cab0652 8506
38527b15 8507 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8508 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8509 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8510 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8511 &args.seq_args, &res.seq_res);
38527b15
CL		 8512 if (status != NFS_OK) {
8513 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8514 return status;
38527b15
CL		 8515 }
8516 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8517 return -res.status;
7d974794
BS		 8518}
8519
38527b15
CL		 8520/**
8521 * nfs41_test_stateid - perform a TEST_STATEID operation
8522 *
8523 * @server: server / transport on which to perform the operation
8524 * @stateid: state ID to test
ab7cb0df 8525 * @cred: credential
38527b15
CL		 8526 *
8527 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8528 * Otherwise a negative NFS4ERR value is returned if the operation
8529 * failed or the state ID is not currently valid.
8530 */
ab7cb0df
TM		 8531static int nfs41_test_stateid(struct nfs_server *server,
8532 nfs4_stateid *stateid,
8533 struct rpc_cred *cred)
7d974794
BS		 8534{
8535 struct nfs4_exception exception = { };
8536 int err;
8537 do {
ab7cb0df 8538 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8539 if (err != -NFS4ERR_DELAY)
8540 break;
8541 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8542 } while (exception.retry);
8543 return err;
8544}
9aeda35f 8545
7c1d5fae
TM		 8546struct nfs_free_stateid_data {
8547 struct nfs_server *server;
8548 struct nfs41_free_stateid_args args;
9aeda35f 8549 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8550};
8551
8552static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8553{
8554 struct nfs_free_stateid_data *data = calldata;
8555 nfs41_setup_sequence(nfs4_get_session(data->server),
8556 &data->args.seq_args,
8557 &data->res.seq_res,
8558 task);
8559}
8560
8561static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8562{
8563 struct nfs_free_stateid_data *data = calldata;
8564
8565 nfs41_sequence_done(task, &data->res.seq_res);
8566
8567 switch (task->tk_status) {
8568 case -NFS4ERR_DELAY:
8478eaa1 8569 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8570 rpc_restart_call_prepare(task);
8571 }
8572}
8573
8574static void nfs41_free_stateid_release(void *calldata)
8575{
8576 kfree(calldata);
8577}
8578
17f26b12 8579static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8580 .rpc_call_prepare = nfs41_free_stateid_prepare,
8581 .rpc_call_done = nfs41_free_stateid_done,
8582 .rpc_release = nfs41_free_stateid_release,
8583};
8584
8585static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8586 nfs4_stateid *stateid,
ab7cb0df 8587 struct rpc_cred *cred,
7c1d5fae
TM		 8588 bool privileged)
8589{
9aeda35f
BS		 8590 struct rpc_message msg = {
8591 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8592 .rpc_cred = cred,
9aeda35f 8593 };
7c1d5fae
TM		 8594 struct rpc_task_setup task_setup = {
8595 .rpc_client = server->client,
8596 .rpc_message = &msg,
8597 .callback_ops = &nfs41_free_stateid_ops,
8598 .flags = RPC_TASK_ASYNC,
8599 };
8600 struct nfs_free_stateid_data *data;
9aeda35f 8601
3787d506
WAA		 8602 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8603 &task_setup.rpc_client, &msg);
8604
38527b15 8605 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8606 data = kmalloc(sizeof(*data), GFP_NOFS);
8607 if (!data)
8608 return ERR_PTR(-ENOMEM);
8609 data->server = server;
8610 nfs4_stateid_copy(&data->args.stateid, stateid);
8611
8612 task_setup.callback_data = data;
8613
8614 msg.rpc_argp = &data->args;
8615 msg.rpc_resp = &data->res;
a9c92d6b 8616 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8617 if (privileged)
8618 nfs4_set_sequence_privileged(&data->args.seq_args);
8619
8620 return rpc_run_task(&task_setup);
9aeda35f
BS		 8621}
8622
38527b15
CL		 8623/**
8624 * nfs41_free_stateid - perform a FREE_STATEID operation
8625 *
8626 * @server: server / transport on which to perform the operation
8627 * @stateid: state ID to release
ab7cb0df 8628 * @cred: credential
38527b15
CL		 8629 *
8630 * Returns NFS_OK if the server freed "stateid". Otherwise a
8631 * negative NFS4ERR value is returned.
8632 */
ab7cb0df
TM		 8633static int nfs41_free_stateid(struct nfs_server *server,
8634 nfs4_stateid *stateid,
8635 struct rpc_cred *cred)
9aeda35f 8636{
7c1d5fae
TM		 8637 struct rpc_task *task;
8638 int ret;
8639
ab7cb0df 8640 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8641 if (IS_ERR(task))
8642 return PTR_ERR(task);
8643 ret = rpc_wait_for_completion_task(task);
8644 if (!ret)
8645 ret = task->tk_status;
8646 rpc_put_task(task);
8647 return ret;
9aeda35f 8648}
36281caa 8649
f1cdae87
JL		 8650static void
8651nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8652{
8653 struct rpc_task *task;
ab7cb0df 8654 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8655
ab7cb0df 8656 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8657 nfs4_free_lock_state(server, lsp);
8658 if (IS_ERR(task))
f1cdae87 8659 return;
c8b2d0bf 8660 rpc_put_task(task);
c8b2d0bf
TM		 8661}
8662
36281caa
TM		 8663static bool nfs41_match_stateid(const nfs4_stateid *s1,
8664 const nfs4_stateid *s2)
8665{
93b717fd
TM		 8666 if (s1->type != s2->type)
8667 return false;
8668
2d2f24ad 8669 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8670 return false;
8671
2d2f24ad 8672 if (s1->seqid == s2->seqid)
36281caa 8673 return true;
2d2f24ad 8674 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8675 return true;
8676
8677 return false;
8678}
8679
557134a3
AA		 8680#endif /* CONFIG_NFS_V4_1 */
8681
36281caa
TM		 8682static bool nfs4_match_stateid(const nfs4_stateid *s1,
8683 const nfs4_stateid *s2)
8684{
f597c537 8685 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8686}
8687
8688
17280175 8689static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8690 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8691 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8692 .recover_open = nfs4_open_reclaim,
8693 .recover_lock = nfs4_lock_reclaim,
591d71cb 8694 .establish_clid = nfs4_init_clientid,
05f4c350 8695 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8696};
8697
591d71cb 8698#if defined(CONFIG_NFS_V4_1)
17280175 8699static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8700 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8701 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8702 .recover_open = nfs4_open_reclaim,
8703 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8704 .establish_clid = nfs41_init_clientid,
fce5c838 8705 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8706 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8707};
8708#endif /* CONFIG_NFS_V4_1 */
8709
17280175 8710static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8711 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8712 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8713 .recover_open = nfs40_open_expired,
591d71cb
AA		 8714 .recover_lock = nfs4_lock_expired,
8715 .establish_clid = nfs4_init_clientid,
8716};
8717
8718#if defined(CONFIG_NFS_V4_1)
17280175 8719static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8720 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8721 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8722 .recover_open = nfs41_open_expired,
8723 .recover_lock = nfs41_lock_expired,
4d643d1d 8724 .establish_clid = nfs41_init_clientid,
1da177e4 8725};
591d71cb 8726#endif /* CONFIG_NFS_V4_1 */
1da177e4 8727
17280175 8728static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8729 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8730 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8731 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8732};
8733
8734#if defined(CONFIG_NFS_V4_1)
17280175 8735static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8736 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8737 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8738 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8739};
8740#endif
8741
ec011fe8 8742static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8743 .get_locations = _nfs40_proc_get_locations,
44c99933 8744 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8745};
8746
8747#if defined(CONFIG_NFS_V4_1)
8748static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8749 .get_locations = _nfs41_proc_get_locations,
44c99933 8750 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8751};
8752#endif /* CONFIG_NFS_V4_1 */
8753
97dc1359
TM		 8754static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8755 .minor_version = 0,
39c6daae
TM		 8756 .init_caps = NFS_CAP_READDIRPLUS
8757 | NFS_CAP_ATOMIC_OPEN
39c6daae 8758 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8759 .init_client = nfs40_init_client,
8760 .shutdown_client = nfs40_shutdown_client,
36281caa 8761 .match_stateid = nfs4_match_stateid,
fca78d6d 8762 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8763 .free_lock_state = nfs4_release_lockowner,
63f5f796 8764 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 8765 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8766 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8767 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8768 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8769 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8770};
8771
8772#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 8773static struct nfs_seqid *
8774nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8775{
8776 return NULL;
8777}
8778
97dc1359
TM		 8779static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8780 .minor_version = 1,
39c6daae
TM		 8781 .init_caps = NFS_CAP_READDIRPLUS
8782 | NFS_CAP_ATOMIC_OPEN
3b66486c 8783 | NFS_CAP_POSIX_LOCK
49f9a0fa 8784 | NFS_CAP_STATEID_NFSV41
e983120e 8785 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8786 .init_client = nfs41_init_client,
8787 .shutdown_client = nfs41_shutdown_client,
36281caa 8788 .match_stateid = nfs41_match_stateid,
fca78d6d 8789 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8790 .free_lock_state = nfs41_free_lock_state,
63f5f796 8791 .alloc_seqid = nfs_alloc_no_seqid,
9915ea7e 8792 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8793 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8794 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8795 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8796 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8797};
8798#endif
8799
42c2c424
SD		 8800#if defined(CONFIG_NFS_V4_2)
8801static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8802 .minor_version = 2,
7017310a
BS		 8803 .init_caps = NFS_CAP_READDIRPLUS
8804 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 8805 | NFS_CAP_POSIX_LOCK
8806 | NFS_CAP_STATEID_NFSV41
e983120e 8807 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 8808 | NFS_CAP_ALLOCATE
2e72448b 8809 | NFS_CAP_COPY
624bd5b7 8810 | NFS_CAP_DEALLOCATE
6c5a0d89 8811 | NFS_CAP_SEEK
e5341f3a
PT		 8812 | NFS_CAP_LAYOUTSTATS
8813 | NFS_CAP_CLONE,
abf79bb3
CL		 8814 .init_client = nfs41_init_client,
8815 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8816 .match_stateid = nfs41_match_stateid,
8817 .find_root_sec = nfs41_find_root_sec,
7017310a 8818 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8819 .call_sync_ops = &nfs41_call_sync_ops,
63f5f796 8820 .alloc_seqid = nfs_alloc_no_seqid,
42c2c424
SD		 8821 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8822 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8823 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 8824 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 8825};
8826#endif
8827
97dc1359
TM		 8828const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8829 [0] = &nfs_v4_0_minor_ops,
8830#if defined(CONFIG_NFS_V4_1)
8831 [1] = &nfs_v4_1_minor_ops,
8832#endif
42c2c424
SD		 8833#if defined(CONFIG_NFS_V4_2)
8834 [2] = &nfs_v4_2_minor_ops,
8835#endif
97dc1359
TM		 8836};
8837
c4803c49
AG		 8838ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
8839{
8840 ssize_t error, error2;
8841
8842 error = generic_listxattr(dentry, list, size);
8843 if (error < 0)
8844 return error;
8845 if (list) {
8846 list += error;
8847 size -= error;
8848 }
8849
8850 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
8851 if (error2 < 0)
8852 return error2;
8853 return error + error2;
8854}
8855
17f26b12 8856static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8857 .create = nfs_create,
8858 .lookup = nfs_lookup,
8859 .atomic_open = nfs_atomic_open,
8860 .link = nfs_link,
8861 .unlink = nfs_unlink,
8862 .symlink = nfs_symlink,
8863 .mkdir = nfs_mkdir,
8864 .rmdir = nfs_rmdir,
8865 .mknod = nfs_mknod,
8866 .rename = nfs_rename,
8867 .permission = nfs_permission,
8868 .getattr = nfs_getattr,
8869 .setattr = nfs_setattr,
8870 .getxattr = generic_getxattr,
8871 .setxattr = generic_setxattr,
c4803c49 8872 .listxattr = nfs4_listxattr,
73a79706
BS		 8873 .removexattr = generic_removexattr,
8874};
8875
92e1d5be 8876static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8877 .permission = nfs_permission,
8878 .getattr = nfs_getattr,
8879 .setattr = nfs_setattr,
64c2ce8b
AK		 8880 .getxattr = generic_getxattr,
8881 .setxattr = generic_setxattr,
c4803c49 8882 .listxattr = nfs4_listxattr,
64c2ce8b 8883 .removexattr = generic_removexattr,
6b3b5496
BF		 8884};
8885
509de811 8886const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8887 .version = 4, /* protocol version */
8888 .dentry_ops = &nfs4_dentry_operations,
8889 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8890 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8891 .file_ops = &nfs4_file_operations,
1da177e4 8892 .getroot = nfs4_proc_get_root,
281cad46 8893 .submount = nfs4_submount,
ff9099f2 8894 .try_mount = nfs4_try_mount,
1da177e4
LT		 8895 .getattr = nfs4_proc_getattr,
8896 .setattr = nfs4_proc_setattr,
8897 .lookup = nfs4_proc_lookup,
8898 .access = nfs4_proc_access,
8899 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8900 .create = nfs4_proc_create,
8901 .remove = nfs4_proc_remove,
8902 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8903 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8904 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8905 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8906 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8907 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8908 .link = nfs4_proc_link,
8909 .symlink = nfs4_proc_symlink,
8910 .mkdir = nfs4_proc_mkdir,
8911 .rmdir = nfs4_proc_remove,
8912 .readdir = nfs4_proc_readdir,
8913 .mknod = nfs4_proc_mknod,
8914 .statfs = nfs4_proc_statfs,
8915 .fsinfo = nfs4_proc_fsinfo,
8916 .pathconf = nfs4_proc_pathconf,
e9326dca 8917 .set_capabilities = nfs4_server_capabilities,
1da177e4 8918 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8919 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8920 .read_setup = nfs4_proc_read_setup,
ec06c096 8921 .read_done = nfs4_read_done,
1da177e4 8922 .write_setup = nfs4_proc_write_setup,
788e7a89 8923 .write_done = nfs4_write_done,
1da177e4 8924 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8925 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8926 .commit_done = nfs4_commit_done,
1da177e4 8927 .lock = nfs4_proc_lock,
e50a1c2e 8928 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8929 .close_context = nfs4_close_context,
2b484297 8930 .open_context = nfs4_atomic_open,
011e2a7f 8931 .have_delegation = nfs4_have_delegation,
57ec14c5 8932 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8933 .alloc_client = nfs4_alloc_client,
45a52a02 8934 .init_client = nfs4_init_client,
cdb7eced 8935 .free_client = nfs4_free_client,
1179acc6
BS		 8936 .create_server = nfs4_create_server,
8937 .clone_server = nfs_clone_server,
1da177e4
LT		 8938};
8939
64c2ce8b 8940static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
98e9cb57 8941 .name = XATTR_NAME_NFSV4_ACL,
64c2ce8b
AK		 8942 .list = nfs4_xattr_list_nfs4_acl,
8943 .get = nfs4_xattr_get_nfs4_acl,
8944 .set = nfs4_xattr_set_nfs4_acl,
8945};
8946
8947const struct xattr_handler *nfs4_xattr_handlers[] = {
8948 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8949#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8950 &nfs4_xattr_nfs4_label_handler,
8951#endif
64c2ce8b
AK		 8952 NULL
8953};
8954
1da177e4
LT		 8955/*
8956 * Local variables:
8957 * c-basic-offset: 8
8958 * End:
8959 */
Linux 6.x block layer and io_uring tree(s)