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make nfs_atomic_open() call d_drop() on all ->open_context() errors.
[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;
2885 } else if (is_rdwr)
2886 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2887
2888 if (calldata->arg.fmode == 0)
2889 call_close |= is_rdwr;
2890
5d422301
TM		 2891 if (!nfs4_valid_open_stateid(state))
2892 call_close = 0;
4cecb76f 2893 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2894
2895 if (!call_close) {
963d8fe5 2896 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2897 goto out_no_action;
9512135d 2898 }
88069f77 2899
500d701f
PT		 2900 if (nfs4_wait_on_layoutreturn(inode, task)) {
2901 nfs_release_seqid(calldata->arg.seqid);
2902 goto out_wait;
2903 }
2904
3c13cb5b 2905 if (calldata->arg.fmode == 0)
88069f77 2906 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3c13cb5b
TM		 2907 if (calldata->roc)
2908 pnfs_roc_get_barrier(inode, &calldata->roc_barrier);
2909
6ae37339
TM		 2910 calldata->arg.share_access =
2911 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2912 calldata->arg.fmode, 0);
88069f77 2913
516a6af6 2914 nfs_fattr_init(calldata->res.fattr);
26e976a8 2915 calldata->timestamp = jiffies;
7fdab069 2916 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2917 &calldata->arg.seq_args,
2918 &calldata->res.seq_res,
2240a9e2
TM		 2919 task) != 0)
2920 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2921 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2922 return;
2923out_no_action:
2924 task->tk_action = NULL;
2925out_wait:
2926 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2927}
2928
963d8fe5 2929static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2930 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2931 .rpc_call_done = nfs4_close_done,
2932 .rpc_release = nfs4_free_closedata,
2933};
2934
fe08c546
PT		 2935static bool nfs4_roc(struct inode *inode)
2936{
40dd4b7a 2937 if (!nfs_have_layout(inode))
fe08c546 2938 return false;
fe08c546
PT		 2939 return pnfs_roc(inode);
2940}
2941
1da177e4
LT		 2942/*
2943 * It is possible for data to be read/written from a mem-mapped file
2944 * after the sys_close call (which hits the vfs layer as a flush).
2945 * This means that we can't safely call nfsv4 close on a file until
2946 * the inode is cleared. This in turn means that we are not good
2947 * NFSv4 citizens - we do not indicate to the server to update the file's
2948 * share state even when we are done with one of the three share
2949 * stateid's in the inode.
2950 *
2951 * NOTE: Caller must be holding the sp->so_owner semaphore!
2952 */
1f7977c1 2953int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2954{
4a35bd41 2955 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 2956 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 2957 struct nfs4_closedata *calldata;
b39e625b
TM		 2958 struct nfs4_state_owner *sp = state->owner;
2959 struct rpc_task *task;
5138fde0
TM		 2960 struct rpc_message msg = {
2961 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2962 .rpc_cred = state->owner->so_cred,
2963 };
c970aa85
TM		 2964 struct rpc_task_setup task_setup_data = {
2965 .rpc_client = server->client,
5138fde0 2966 .rpc_message = &msg,
c970aa85 2967 .callback_ops = &nfs4_close_ops,
101070ca 2968 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2969 .flags = RPC_TASK_ASYNC,
2970 };
9512135d 2971 int status = -ENOMEM;
1da177e4 2972
fa940720
WAA		 2973 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2974 &task_setup_data.rpc_client, &msg);
2975
8535b2be 2976 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2977 if (calldata == NULL)
9512135d 2978 goto out;
a9c92d6b 2979 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2980 calldata->inode = state->inode;
1da177e4 2981 calldata->state = state;
4a35bd41 2982 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 2983 /* Serialization for the sequence id */
63f5f796
TM		 2984 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2985 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 2986 if (IS_ERR(calldata->arg.seqid))
9512135d 2987 goto out_free_calldata;
dc0b027d 2988 calldata->arg.fmode = 0;
a65318bf 2989 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2990 calldata->res.fattr = &calldata->fattr;
c1d51931 2991 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2992 calldata->res.server = server;
fe08c546 2993 calldata->roc = nfs4_roc(state->inode);
643168c2 2994 nfs_sb_active(calldata->inode->i_sb);
9512135d 2995
1174dd1f
TM		 2996 msg.rpc_argp = &calldata->arg;
2997 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2998 task_setup_data.callback_data = calldata;
2999 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 3000 if (IS_ERR(task))
3001 return PTR_ERR(task);
a49c3c77
TM		 3002 status = 0;
3003 if (wait)
3004 status = rpc_wait_for_completion_task(task);
b39e625b 3005 rpc_put_task(task);
a49c3c77 3006 return status;
9512135d
TM		 3007out_free_calldata:
3008 kfree(calldata);
3009out:
b39e625b
TM		 3010 nfs4_put_open_state(state);
3011 nfs4_put_state_owner(sp);
9512135d 3012 return status;
1da177e4
LT		 3013}
3014
2b484297 3015static struct inode *
5bc2afc2
TM		 3016nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
3017 int open_flags, struct iattr *attr, int *opened)
1da177e4 3018{
1da177e4 3019 struct nfs4_state *state;
aa9c2669
DQ		 3020 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
3021
3022 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 3023
565277f6 3024 /* Protect against concurrent sillydeletes */
5bc2afc2 3025 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 3026
3027 nfs4_label_release_security(label);
3028
f46e0bd3
TM		 3029 if (IS_ERR(state))
3030 return ERR_CAST(state);
275bb307 3031 return state->inode;
1da177e4
LT		 3032}
3033
1185a552 3034static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 3035{
3036 if (ctx->state == NULL)
3037 return;
3038 if (is_sync)
643168c2 3039 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 3040 else
643168c2 3041 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 3042}
1da177e4 3043
b944dba3
TM		 3044#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3045#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 3046#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 3047
1da177e4
LT		 3048static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3049{
8c61282f 3050 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 3051 struct nfs4_server_caps_arg args = {
3052 .fhandle = fhandle,
8c61282f 3053 .bitmask = bitmask,
43652ad5 3054 };
1da177e4
LT		 3055 struct nfs4_server_caps_res res = {};
3056 struct rpc_message msg = {
3057 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 3058 .rpc_argp = &args,
1da177e4
LT		 3059 .rpc_resp = &res,
3060 };
3061 int status;
3062
8c61282f
KM		 3063 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3064 FATTR4_WORD0_FH_EXPIRE_TYPE |
3065 FATTR4_WORD0_LINK_SUPPORT |
3066 FATTR4_WORD0_SYMLINK_SUPPORT |
3067 FATTR4_WORD0_ACLSUPPORT;
3068 if (minorversion)
3069 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3070
7c513058 3071 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3072 if (status == 0) {
b944dba3 3073 /* Sanity check the server answers */
8c61282f 3074 switch (minorversion) {
b944dba3
TM		 3075 case 0:
3076 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3077 res.attr_bitmask[2] = 0;
3078 break;
3079 case 1:
3080 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3081 break;
3082 case 2:
3083 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3084 }
1da177e4 3085 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 3086 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3087 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3088 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3089 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 3090 NFS_CAP_CTIME|NFS_CAP_MTIME|
3091 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 3092 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3093 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 3094 server->caps |= NFS_CAP_ACLS;
3095 if (res.has_links != 0)
3096 server->caps |= NFS_CAP_HARDLINKS;
3097 if (res.has_symlinks != 0)
3098 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 3099 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3100 server->caps |= NFS_CAP_FILEID;
3101 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3102 server->caps |= NFS_CAP_MODE;
3103 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3104 server->caps |= NFS_CAP_NLINK;
3105 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3106 server->caps |= NFS_CAP_OWNER;
3107 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3108 server->caps |= NFS_CAP_OWNER_GROUP;
3109 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3110 server->caps |= NFS_CAP_ATIME;
3111 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3112 server->caps |= NFS_CAP_CTIME;
3113 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3114 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 3115#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3116 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3117 server->caps |= NFS_CAP_SECURITY_LABEL;
3118#endif
3119 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3120 sizeof(server->attr_bitmask));
b944dba3 3121 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 3122
a65318bf
TM		 3123 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3124 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3125 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 3126 server->cache_consistency_bitmask[2] = 0;
8c61282f
KM		 3127 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3128 sizeof(server->exclcreat_bitmask));
1da177e4 3129 server->acl_bitmask = res.acl_bitmask;
264e6351 3130 server->fh_expire_type = res.fh_expire_type;
1da177e4 3131 }
cccef3b9 3132
1da177e4
LT		 3133 return status;
3134}
3135
55a97593 3136int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 3137{
3138 struct nfs4_exception exception = { };
3139 int err;
3140 do {
3141 err = nfs4_handle_exception(server,
3142 _nfs4_server_capabilities(server, fhandle),
3143 &exception);
3144 } while (exception.retry);
3145 return err;
3146}
3147
3148static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3149 struct nfs_fsinfo *info)
3150{
aa9c2669 3151 u32 bitmask[3];
1da177e4 3152 struct nfs4_lookup_root_arg args = {
aa9c2669 3153 .bitmask = bitmask,
1da177e4
LT		 3154 };
3155 struct nfs4_lookup_res res = {
3156 .server = server,
0e574af1 3157 .fattr = info->fattr,
1da177e4
LT		 3158 .fh = fhandle,
3159 };
3160 struct rpc_message msg = {
3161 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3162 .rpc_argp = &args,
3163 .rpc_resp = &res,
3164 };
008f55d0 3165
aa9c2669
DQ		 3166 bitmask[0] = nfs4_fattr_bitmap[0];
3167 bitmask[1] = nfs4_fattr_bitmap[1];
3168 /*
3169 * Process the label in the upcoming getfattr
3170 */
3171 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3172
0e574af1 3173 nfs_fattr_init(info->fattr);
7c513058 3174 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3175}
3176
3177static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3178 struct nfs_fsinfo *info)
3179{
3180 struct nfs4_exception exception = { };
3181 int err;
3182 do {
fb8a5ba8 3183 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3184 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3185 switch (err) {
3186 case 0:
3187 case -NFS4ERR_WRONGSEC:
05e9cfb4 3188 goto out;
fb8a5ba8
BS		 3189 default:
3190 err = nfs4_handle_exception(server, err, &exception);
3191 }
1da177e4 3192 } while (exception.retry);
05e9cfb4 3193out:
1da177e4
LT		 3194 return err;
3195}
3196
8f70e95f
BS		 3197static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3198 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3199{
c2190661
TM		 3200 struct rpc_auth_create_args auth_args = {
3201 .pseudoflavor = flavor,
3202 };
8f70e95f
BS		 3203 struct rpc_auth *auth;
3204 int ret;
3205
c2190661 3206 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3207 if (IS_ERR(auth)) {
75bc8821 3208 ret = -EACCES;
8f70e95f
BS		 3209 goto out;
3210 }
3211 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3212out:
3213 return ret;
3214}
3215
9a744ba3
CL		 3216/*
3217 * Retry pseudoroot lookup with various security flavors. We do this when:
3218 *
3219 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3220 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3221 *
3222 * Returns zero on success, or a negative NFS4ERR value, or a
3223 * negative errno value.
3224 */
801a16dc 3225static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3226 struct nfs_fsinfo *info)
1da177e4 3227{
9a744ba3
CL		 3228 /* Per 3530bis 15.33.5 */
3229 static const rpc_authflavor_t flav_array[] = {
3230 RPC_AUTH_GSS_KRB5P,
3231 RPC_AUTH_GSS_KRB5I,
3232 RPC_AUTH_GSS_KRB5,
c4eafe11 3233 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3234 RPC_AUTH_NULL,
3235 };
3236 int status = -EPERM;
3237 size_t i;
6a1a1e34 3238
4d4b69dd
WAA		 3239 if (server->auth_info.flavor_len > 0) {
3240 /* try each flavor specified by user */
3241 for (i = 0; i < server->auth_info.flavor_len; i++) {
3242 status = nfs4_lookup_root_sec(server, fhandle, info,
3243 server->auth_info.flavors[i]);
3244 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3245 continue;
3246 break;
3247 }
3248 } else {
3249 /* no flavors specified by user, try default list */
3250 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3251 status = nfs4_lookup_root_sec(server, fhandle, info,
3252 flav_array[i]);
3253 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3254 continue;
3255 break;
3256 }
8f70e95f 3257 }
9a744ba3 3258
fb8a5ba8
BS		 3259 /*
3260 * -EACCESS could mean that the user doesn't have correct permissions
3261 * to access the mount. It could also mean that we tried to mount
3262 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3263 * existing mount programs don't handle -EACCES very well so it should
3264 * be mapped to -EPERM instead.
3265 */
3266 if (status == -EACCES)
3267 status = -EPERM;
801a16dc
BS		 3268 return status;
3269}
3270
2ed4b95b
CL		 3271static int nfs4_do_find_root_sec(struct nfs_server *server,
3272 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3273{
3274 int mv = server->nfs_client->cl_minorversion;
3275 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3276}
3277
3278/**
3279 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3280 * @server: initialized nfs_server handle
3281 * @fhandle: we fill in the pseudo-fs root file handle
3282 * @info: we fill in an FSINFO struct
5e6b1990 3283 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3284 *
3285 * Returns zero on success, or a negative errno.
801a16dc 3286 */
3028eb2b 3287int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3288 struct nfs_fsinfo *info,
3289 bool auth_probe)
801a16dc 3290{
c7757074 3291 int status = 0;
2ed4b95b 3292
c7757074 3293 if (!auth_probe)
5e6b1990 3294 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3295
3296 if (auth_probe || status == NFS4ERR_WRONGSEC)
2ed4b95b
CL		 3297 status = nfs4_do_find_root_sec(server, fhandle, info);
3298
1da177e4
LT		 3299 if (status == 0)
3300 status = nfs4_server_capabilities(server, fhandle);
3301 if (status == 0)
3302 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3303
c12e87f4 3304 return nfs4_map_errors(status);
1da177e4
LT		 3305}
3306
bae36241
BS		 3307static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3308 struct nfs_fsinfo *info)
3309{
3310 int error;
3311 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3312 struct nfs4_label *label = NULL;
bae36241
BS		 3313
3314 error = nfs4_server_capabilities(server, mntfh);
3315 if (error < 0) {
3316 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3317 return error;
3318 }
3319
14c43f76
DQ		 3320 label = nfs4_label_alloc(server, GFP_KERNEL);
3321 if (IS_ERR(label))
3322 return PTR_ERR(label);
3323
1775fd3e 3324 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3325 if (error < 0) {
3326 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3327 goto err_free_label;
bae36241
BS		 3328 }
3329
3330 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3331 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3332 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3333
14c43f76
DQ		 3334err_free_label:
3335 nfs4_label_free(label);
3336
bae36241
BS		 3337 return error;
3338}
3339
6b97fd3d
MN		 3340/*
3341 * Get locations and (maybe) other attributes of a referral.
3342 * Note that we'll actually follow the referral later when
3343 * we detect fsid mismatch in inode revalidation
3344 */
f05d147f
BS		 3345static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3346 const struct qstr *name, struct nfs_fattr *fattr,
3347 struct nfs_fh *fhandle)
6b97fd3d
MN		 3348{
3349 int status = -ENOMEM;
3350 struct page *page = NULL;
3351 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3352
3353 page = alloc_page(GFP_KERNEL);
3354 if (page == NULL)
3355 goto out;
3356 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3357 if (locations == NULL)
3358 goto out;
3359
f05d147f 3360 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3361 if (status != 0)
3362 goto out;
519ae255
CL		 3363
3364 /*
3365 * If the fsid didn't change, this is a migration event, not a
3366 * referral. Cause us to drop into the exception handler, which
3367 * will kick off migration recovery.
3368 */
6b97fd3d 3369 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3370 dprintk("%s: server did not return a different fsid for"
3371 " a referral at %s\n", __func__, name->name);
519ae255 3372 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3373 goto out;
3374 }
533eb461
AA		 3375 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3376 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3377
533eb461 3378 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3379 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3380 memset(fhandle, 0, sizeof(struct nfs_fh));
3381out:
3382 if (page)
3383 __free_page(page);
5d7ca35a 3384 kfree(locations);
6b97fd3d
MN		 3385 return status;
3386}
3387
1775fd3e
DQ		 3388static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3389 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3390{
3391 struct nfs4_getattr_arg args = {
3392 .fh = fhandle,
3393 .bitmask = server->attr_bitmask,
3394 };
3395 struct nfs4_getattr_res res = {
3396 .fattr = fattr,
1775fd3e 3397 .label = label,
1da177e4
LT		 3398 .server = server,
3399 };
3400 struct rpc_message msg = {
3401 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3402 .rpc_argp = &args,
3403 .rpc_resp = &res,
3404 };
aa9c2669
DQ		 3405
3406 args.bitmask = nfs4_bitmask(server, label);
3407
0e574af1 3408 nfs_fattr_init(fattr);
7c513058 3409 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3410}
3411
1775fd3e
DQ		 3412static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3413 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3414{
3415 struct nfs4_exception exception = { };
3416 int err;
3417 do {
b5f875a9
TM		 3418 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3419 trace_nfs4_getattr(server, fhandle, fattr, err);
3420 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3421 &exception);
3422 } while (exception.retry);
3423 return err;
3424}
3425
3426/*
3427 * The file is not closed if it is opened due to the a request to change
3428 * the size of the file. The open call will not be needed once the
3429 * VFS layer lookup-intents are implemented.
3430 *
3431 * Close is called when the inode is destroyed.
3432 * If we haven't opened the file for O_WRONLY, we
3433 * need to in the size_change case to obtain a stateid.
3434 *
3435 * Got race?
3436 * Because OPEN is always done by name in nfsv4, it is
3437 * possible that we opened a different file by the same
3438 * name. We can recognize this race condition, but we
3439 * can't do anything about it besides returning an error.
3440 *
3441 * This will be fixed with VFS changes (lookup-intent).
3442 */
3443static int
3444nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3445 struct iattr *sattr)
3446{
2b0143b5 3447 struct inode *inode = d_inode(dentry);
659bfcd6 3448 struct rpc_cred *cred = NULL;
d530838b 3449 struct nfs4_state *state = NULL;
14c43f76 3450 struct nfs4_label *label = NULL;
1da177e4
LT		 3451 int status;
3452
88ac815c
PT		 3453 if (pnfs_ld_layoutret_on_setattr(inode) &&
3454 sattr->ia_valid & ATTR_SIZE &&
3455 sattr->ia_size < i_size_read(inode))
24028672 3456 pnfs_commit_and_return_layout(inode);
8a1636c4 3457
0e574af1 3458 nfs_fattr_init(fattr);
1da177e4 3459
2669940d
AA		 3460 /* Deal with open(O_TRUNC) */
3461 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3462 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3463
3464 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3465 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3466 return 0;
3467
d530838b 3468 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3469 if (sattr->ia_valid & ATTR_FILE) {
3470 struct nfs_open_context *ctx;
3471
3472 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3473 if (ctx) {
3474 cred = ctx->cred;
3475 state = ctx->state;
3476 }
659bfcd6 3477 }
08e9eac4 3478
14c43f76
DQ		 3479 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3480 if (IS_ERR(label))
3481 return PTR_ERR(label);
3482
3483 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3484 if (status == 0) {
f044636d 3485 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3486 nfs_setsecurity(inode, fattr, label);
3487 }
14c43f76 3488 nfs4_label_free(label);
1da177e4
LT		 3489 return status;
3490}
3491
0c2e53f1
TM		 3492static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3493 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3494 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3495{
0c2e53f1 3496 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3497 int status;
3498 struct nfs4_lookup_arg args = {
3499 .bitmask = server->attr_bitmask,
0c2e53f1 3500 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3501 .name = name,
3502 };
3503 struct nfs4_lookup_res res = {
3504 .server = server,
3505 .fattr = fattr,
aa9c2669 3506 .label = label,
2b3de441
DH		 3507 .fh = fhandle,
3508 };
3509 struct rpc_message msg = {
3510 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3511 .rpc_argp = &args,
3512 .rpc_resp = &res,
3513 };
3514
aa9c2669
DQ		 3515 args.bitmask = nfs4_bitmask(server, label);
3516
2b3de441
DH		 3517 nfs_fattr_init(fattr);
3518
1da177e4 3519 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3520 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3521 dprintk("NFS reply lookup: %d\n", status);
3522 return status;
3523}
3524
72de53ec 3525static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3526{
7ebb9315 3527 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3528 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3529 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3530 fattr->nlink = 2;
3531}
3532
72de53ec
BS		 3533static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3534 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3535 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3536{
3537 struct nfs4_exception exception = { };
72de53ec 3538 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3539 int err;
3540 do {
1775fd3e 3541 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3542 trace_nfs4_lookup(dir, name, err);
72de53ec 3543 switch (err) {
08ef7bd3 3544 case -NFS4ERR_BADNAME:
72de53ec
BS		 3545 err = -ENOENT;
3546 goto out;
0c2e53f1 3547 case -NFS4ERR_MOVED:
f05d147f 3548 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3549 if (err == -NFS4ERR_MOVED)
3550 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3551 goto out;
0c2e53f1 3552 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3553 err = -EPERM;
3554 if (client != *clnt)
3555 goto out;
66b06860 3556 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3557 if (IS_ERR(client))
3558 return PTR_ERR(client);
3559
3560 exception.retry = 1;
3561 break;
3562 default:
3563 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3564 }
1da177e4 3565 } while (exception.retry);
72de53ec
BS		 3566
3567out:
3568 if (err == 0)
3569 *clnt = client;
3570 else if (client != *clnt)
3571 rpc_shutdown_client(client);
3572
1da177e4
LT		 3573 return err;
3574}
3575
80a16b21 3576static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3577 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3578 struct nfs4_label *label)
72de53ec
BS		 3579{
3580 int status;
3581 struct rpc_clnt *client = NFS_CLIENT(dir);
3582
1775fd3e 3583 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3584 if (client != NFS_CLIENT(dir)) {
3585 rpc_shutdown_client(client);
3586 nfs_fixup_secinfo_attributes(fattr);
3587 }
3588 return status;
3589}
3590
f05d147f
BS		 3591struct rpc_clnt *
3592nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3593 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3594{
b72888cb 3595 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3596 int status;
f05d147f 3597
1775fd3e 3598 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3599 if (status < 0)
f05d147f 3600 return ERR_PTR(status);
b72888cb 3601 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3602}
3603
1da177e4
LT		 3604static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3605{
76b32999 3606 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3607 struct nfs4_accessargs args = {
3608 .fh = NFS_FH(inode),
a4980e78 3609 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3610 };
3611 struct nfs4_accessres res = {
3612 .server = server,
1da177e4 3613 };
1da177e4
LT		 3614 struct rpc_message msg = {
3615 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3616 .rpc_argp = &args,
3617 .rpc_resp = &res,
3618 .rpc_cred = entry->cred,
3619 };
3620 int mode = entry->mask;
aa9c2669 3621 int status = 0;
1da177e4
LT		 3622
3623 /*
3624 * Determine which access bits we want to ask for...
3625 */
3626 if (mode & MAY_READ)
3627 args.access |= NFS4_ACCESS_READ;
3628 if (S_ISDIR(inode->i_mode)) {
3629 if (mode & MAY_WRITE)
3630 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3631 if (mode & MAY_EXEC)
3632 args.access |= NFS4_ACCESS_LOOKUP;
3633 } else {
3634 if (mode & MAY_WRITE)
3635 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3636 if (mode & MAY_EXEC)
3637 args.access |= NFS4_ACCESS_EXECUTE;
3638 }
c407d41a
TM		 3639
3640 res.fattr = nfs_alloc_fattr();
3641 if (res.fattr == NULL)
3642 return -ENOMEM;
3643
7c513058 3644 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3645 if (!status) {
6168f62c 3646 nfs_access_set_mask(entry, res.access);
c407d41a 3647 nfs_refresh_inode(inode, res.fattr);
1da177e4 3648 }
c407d41a 3649 nfs_free_fattr(res.fattr);
1da177e4
LT		 3650 return status;
3651}
3652
3653static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3654{
3655 struct nfs4_exception exception = { };
3656 int err;
3657 do {
c1578b76
TM		 3658 err = _nfs4_proc_access(inode, entry);
3659 trace_nfs4_access(inode, err);
3660 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3661 &exception);
3662 } while (exception.retry);
3663 return err;
3664}
3665
3666/*
3667 * TODO: For the time being, we don't try to get any attributes
3668 * along with any of the zero-copy operations READ, READDIR,
3669 * READLINK, WRITE.
3670 *
3671 * In the case of the first three, we want to put the GETATTR
3672 * after the read-type operation -- this is because it is hard
3673 * to predict the length of a GETATTR response in v4, and thus
3674 * align the READ data correctly. This means that the GETATTR
3675 * may end up partially falling into the page cache, and we should
3676 * shift it into the 'tail' of the xdr_buf before processing.
3677 * To do this efficiently, we need to know the total length
3678 * of data received, which doesn't seem to be available outside
3679 * of the RPC layer.
3680 *
3681 * In the case of WRITE, we also want to put the GETATTR after
3682 * the operation -- in this case because we want to make sure
140150db 3683 * we get the post-operation mtime and size.
1da177e4
LT		 3684 *
3685 * Both of these changes to the XDR layer would in fact be quite
3686 * minor, but I decided to leave them for a subsequent patch.
3687 */
3688static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3689 unsigned int pgbase, unsigned int pglen)
3690{
3691 struct nfs4_readlink args = {
3692 .fh = NFS_FH(inode),
3693 .pgbase = pgbase,
3694 .pglen = pglen,
3695 .pages = &page,
3696 };
f50c7000 3697 struct nfs4_readlink_res res;
1da177e4
LT		 3698 struct rpc_message msg = {
3699 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3700 .rpc_argp = &args,
f50c7000 3701 .rpc_resp = &res,
1da177e4
LT		 3702 };
3703
7c513058 3704 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3705}
3706
3707static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3708 unsigned int pgbase, unsigned int pglen)
3709{
3710 struct nfs4_exception exception = { };
3711 int err;
3712 do {
c1578b76
TM		 3713 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3714 trace_nfs4_readlink(inode, err);
3715 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3716 &exception);
3717 } while (exception.retry);
3718 return err;
3719}
3720
1da177e4 3721/*
8867fe58 3722 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3723 */
1da177e4
LT		 3724static int
3725nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3726 int flags)
1da177e4 3727{
aa9c2669 3728 struct nfs4_label l, *ilabel = NULL;
8867fe58 3729 struct nfs_open_context *ctx;
1da177e4 3730 struct nfs4_state *state;
1da177e4
LT		 3731 int status = 0;
3732
8867fe58
MS		 3733 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3734 if (IS_ERR(ctx))
3735 return PTR_ERR(ctx);
3736
aa9c2669
DQ		 3737 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3738
a8a5da99 3739 sattr->ia_mode &= ~current_umask();
c5c3fb5f 3740 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 3741 if (IS_ERR(state)) {
3742 status = PTR_ERR(state);
c0204fd2 3743 goto out;
1da177e4 3744 }
1da177e4 3745out:
aa9c2669 3746 nfs4_label_release_security(ilabel);
8867fe58 3747 put_nfs_open_context(ctx);
1da177e4
LT		 3748 return status;
3749}
3750
3751static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3752{
16e42959 3753 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3754 struct nfs_removeargs args = {
1da177e4 3755 .fh = NFS_FH(dir),
26fe5750 3756 .name = *name,
16e42959 3757 };
4fdc17b2 3758 struct nfs_removeres res = {
16e42959 3759 .server = server,
1da177e4 3760 };
1da177e4 3761 struct rpc_message msg = {
4fdc17b2
TM		 3762 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3763 .rpc_argp = &args,
3764 .rpc_resp = &res,
1da177e4 3765 };
778d2817 3766 int status;
1da177e4 3767
7c513058 3768 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3769 if (status == 0)
16e42959 3770 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3771 return status;
3772}
3773
3774static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3775{
3776 struct nfs4_exception exception = { };
3777 int err;
3778 do {
078ea3df
TM		 3779 err = _nfs4_proc_remove(dir, name);
3780 trace_nfs4_remove(dir, name, err);
3781 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3782 &exception);
3783 } while (exception.retry);
3784 return err;
3785}
3786
e4eff1a6 3787static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3788{
e4eff1a6
TM		 3789 struct nfs_server *server = NFS_SERVER(dir);
3790 struct nfs_removeargs *args = msg->rpc_argp;
3791 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3792
e4eff1a6 3793 res->server = server;
1da177e4 3794 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3795 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3796
3797 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3798}
3799
34e137cc
BS		 3800static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3801{
884be175 3802 nfs4_setup_sequence(NFS_SB(data->dentry->d_sb),
d9afbd1b
TM		 3803 &data->args.seq_args,
3804 &data->res.seq_res,
3805 task);
1da177e4
LT		 3806}
3807
e4eff1a6 3808static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3809{
078ea3df
TM		 3810 struct nfs_unlinkdata *data = task->tk_calldata;
3811 struct nfs_removeres *res = &data->res;
e4eff1a6 3812
14516c3a
TM		 3813 if (!nfs4_sequence_done(task, &res->seq_res))
3814 return 0;
8478eaa1
N		 3815 if (nfs4_async_handle_error(task, res->server, NULL,
3816 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3817 return 0;
3818 update_changeattr(dir, &res->cinfo);
e4eff1a6 3819 return 1;
1da177e4
LT		 3820}
3821
d3d4152a
JL		 3822static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3823{
3824 struct nfs_server *server = NFS_SERVER(dir);
3825 struct nfs_renameargs *arg = msg->rpc_argp;
3826 struct nfs_renameres *res = msg->rpc_resp;
3827
3828 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3829 res->server = server;
a9c92d6b 3830 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3831}
3832
c6bfa1a1
BS		 3833static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3834{
d9afbd1b
TM		 3835 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3836 &data->args.seq_args,
3837 &data->res.seq_res,
3838 task);
d3d4152a
JL		 3839}
3840
3841static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3842 struct inode *new_dir)
3843{
fbc6f7c2
TM		 3844 struct nfs_renamedata *data = task->tk_calldata;
3845 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3846
3847 if (!nfs4_sequence_done(task, &res->seq_res))
3848 return 0;
8478eaa1 3849 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3850 return 0;
3851
3852 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3853 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3854 return 1;
3855}
3856
1da177e4
LT		 3857static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3858{
91ba2eee 3859 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3860 struct nfs4_link_arg arg = {
3861 .fh = NFS_FH(inode),
3862 .dir_fh = NFS_FH(dir),
3863 .name = name,
91ba2eee
TM		 3864 .bitmask = server->attr_bitmask,
3865 };
91ba2eee
TM		 3866 struct nfs4_link_res res = {
3867 .server = server,
1775fd3e 3868 .label = NULL,
1da177e4 3869 };
1da177e4
LT		 3870 struct rpc_message msg = {
3871 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3872 .rpc_argp = &arg,
91ba2eee 3873 .rpc_resp = &res,
1da177e4 3874 };
136f2627
TM		 3875 int status = -ENOMEM;
3876
3877 res.fattr = nfs_alloc_fattr();
778d2817 3878 if (res.fattr == NULL)
136f2627 3879 goto out;
1da177e4 3880
14c43f76
DQ		 3881 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3882 if (IS_ERR(res.label)) {
3883 status = PTR_ERR(res.label);
3884 goto out;
3885 }
aa9c2669 3886 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3887
7c513058 3888 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3889 if (!status) {
3890 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3891 status = nfs_post_op_update_inode(inode, res.fattr);
3892 if (!status)
3893 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3894 }
14c43f76
DQ		 3895
3896
3897 nfs4_label_free(res.label);
3898
136f2627 3899out:
136f2627 3900 nfs_free_fattr(res.fattr);
1da177e4
LT		 3901 return status;
3902}
3903
3904static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3905{
3906 struct nfs4_exception exception = { };
3907 int err;
3908 do {
3909 err = nfs4_handle_exception(NFS_SERVER(inode),
3910 _nfs4_proc_link(inode, dir, name),
3911 &exception);
3912 } while (exception.retry);
3913 return err;
3914}
3915
57dc9a57
TM		 3916struct nfs4_createdata {
3917 struct rpc_message msg;
3918 struct nfs4_create_arg arg;
3919 struct nfs4_create_res res;
3920 struct nfs_fh fh;
3921 struct nfs_fattr fattr;
1775fd3e 3922 struct nfs4_label *label;
57dc9a57
TM		 3923};
3924
3925static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3926 struct qstr *name, struct iattr *sattr, u32 ftype)
3927{
3928 struct nfs4_createdata *data;
3929
3930 data = kzalloc(sizeof(*data), GFP_KERNEL);
3931 if (data != NULL) {
3932 struct nfs_server *server = NFS_SERVER(dir);
3933
14c43f76
DQ		 3934 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3935 if (IS_ERR(data->label))
3936 goto out_free;
3937
57dc9a57
TM		 3938 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3939 data->msg.rpc_argp = &data->arg;
3940 data->msg.rpc_resp = &data->res;
3941 data->arg.dir_fh = NFS_FH(dir);
3942 data->arg.server = server;
3943 data->arg.name = name;
3944 data->arg.attrs = sattr;
3945 data->arg.ftype = ftype;
aa9c2669 3946 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3947 data->res.server = server;
3948 data->res.fh = &data->fh;
3949 data->res.fattr = &data->fattr;
1775fd3e 3950 data->res.label = data->label;
57dc9a57 3951 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3952 }
3953 return data;
14c43f76
DQ		 3954out_free:
3955 kfree(data);
3956 return NULL;
57dc9a57
TM		 3957}
3958
3959static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3960{
7c513058 3961 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3962 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3963 if (status == 0) {
3964 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3965 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3966 }
3967 return status;
3968}
3969
3970static void nfs4_free_createdata(struct nfs4_createdata *data)
3971{
14c43f76 3972 nfs4_label_free(data->label);
57dc9a57
TM		 3973 kfree(data);
3974}
3975
4f390c15 3976static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3977 struct page *page, unsigned int len, struct iattr *sattr,
3978 struct nfs4_label *label)
1da177e4 3979{
57dc9a57
TM		 3980 struct nfs4_createdata *data;
3981 int status = -ENAMETOOLONG;
1da177e4 3982
94a6d753 3983 if (len > NFS4_MAXPATHLEN)
57dc9a57 3984 goto out;
4f390c15 3985
57dc9a57
TM		 3986 status = -ENOMEM;
3987 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3988 if (data == NULL)
3989 goto out;
3990
3991 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3992 data->arg.u.symlink.pages = &page;
3993 data->arg.u.symlink.len = len;
1775fd3e 3994 data->arg.label = label;
1da177e4 3995
57dc9a57
TM		 3996 status = nfs4_do_create(dir, dentry, data);
3997
3998 nfs4_free_createdata(data);
3999out:
1da177e4
LT		 4000 return status;
4001}
4002
4f390c15 4003static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 4004 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 4005{
4006 struct nfs4_exception exception = { };
aa9c2669 4007 struct nfs4_label l, *label = NULL;
1da177e4 4008 int err;
aa9c2669
DQ		 4009
4010 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4011
1da177e4 4012 do {
078ea3df
TM		 4013 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
4014 trace_nfs4_symlink(dir, &dentry->d_name, err);
4015 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4016 &exception);
4017 } while (exception.retry);
aa9c2669
DQ		 4018
4019 nfs4_label_release_security(label);
1da177e4
LT		 4020 return err;
4021}
4022
4023static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 4024 struct iattr *sattr, struct nfs4_label *label)
1da177e4 4025{
57dc9a57
TM		 4026 struct nfs4_createdata *data;
4027 int status = -ENOMEM;
1da177e4 4028
57dc9a57
TM		 4029 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4030 if (data == NULL)
4031 goto out;
4032
1775fd3e 4033 data->arg.label = label;
57dc9a57
TM		 4034 status = nfs4_do_create(dir, dentry, data);
4035
4036 nfs4_free_createdata(data);
4037out:
1da177e4
LT		 4038 return status;
4039}
4040
4041static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4042 struct iattr *sattr)
4043{
4044 struct nfs4_exception exception = { };
aa9c2669 4045 struct nfs4_label l, *label = NULL;
1da177e4 4046 int err;
a8a5da99 4047
aa9c2669
DQ		 4048 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4049
a8a5da99 4050 sattr->ia_mode &= ~current_umask();
1da177e4 4051 do {
078ea3df
TM		 4052 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4053 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4054 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4055 &exception);
4056 } while (exception.retry);
aa9c2669
DQ		 4057 nfs4_label_release_security(label);
4058
1da177e4
LT		 4059 return err;
4060}
4061
4062static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4063 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4 4064{
2b0143b5 4065 struct inode *dir = d_inode(dentry);
1da177e4
LT		 4066 struct nfs4_readdir_arg args = {
4067 .fh = NFS_FH(dir),
56e4ebf8 4068 .pages = pages,
1da177e4
LT		 4069 .pgbase = 0,
4070 .count = count,
2b0143b5 4071 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 4072 .plus = plus,
1da177e4
LT		 4073 };
4074 struct nfs4_readdir_res res;
4075 struct rpc_message msg = {
4076 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4077 .rpc_argp = &args,
4078 .rpc_resp = &res,
4079 .rpc_cred = cred,
4080 };
4081 int status;
4082
6de1472f
AV		 4083 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4084 dentry,
eadf4598 4085 (unsigned long long)cookie);
c3f52af3 4086 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 4087 res.pgbase = args.pgbase;
7c513058 4088 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 4089 if (status >= 0) {
c3f52af3 4090 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 4091 status += args.pgbase;
4092 }
c4812998
TM		 4093
4094 nfs_invalidate_atime(dir);
4095
3110ff80 4096 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 4097 return status;
4098}
4099
4100static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4101 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 4102{
4103 struct nfs4_exception exception = { };
4104 int err;
4105 do {
c1578b76
TM		 4106 err = _nfs4_proc_readdir(dentry, cred, cookie,
4107 pages, count, plus);
2b0143b5
DH		 4108 trace_nfs4_readdir(d_inode(dentry), err);
4109 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 4110 &exception);
4111 } while (exception.retry);
4112 return err;
4113}
4114
4115static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 4116 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 4117{
57dc9a57
TM		 4118 struct nfs4_createdata *data;
4119 int mode = sattr->ia_mode;
4120 int status = -ENOMEM;
1da177e4 4121
57dc9a57
TM		 4122 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4123 if (data == NULL)
4124 goto out;
4125
1da177e4 4126 if (S_ISFIFO(mode))
57dc9a57 4127 data->arg.ftype = NF4FIFO;
1da177e4 4128 else if (S_ISBLK(mode)) {
57dc9a57
TM		 4129 data->arg.ftype = NF4BLK;
4130 data->arg.u.device.specdata1 = MAJOR(rdev);
4131 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 4132 }
4133 else if (S_ISCHR(mode)) {
57dc9a57
TM		 4134 data->arg.ftype = NF4CHR;
4135 data->arg.u.device.specdata1 = MAJOR(rdev);
4136 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 4137 } else if (!S_ISSOCK(mode)) {
4138 status = -EINVAL;
4139 goto out_free;
1da177e4 4140 }
1775fd3e 4141
aa9c2669 4142 data->arg.label = label;
57dc9a57 4143 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 4144out_free:
57dc9a57
TM		 4145 nfs4_free_createdata(data);
4146out:
1da177e4
LT		 4147 return status;
4148}
4149
4150static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4151 struct iattr *sattr, dev_t rdev)
4152{
4153 struct nfs4_exception exception = { };
aa9c2669 4154 struct nfs4_label l, *label = NULL;
1da177e4 4155 int err;
a8a5da99 4156
aa9c2669
DQ		 4157 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4158
a8a5da99 4159 sattr->ia_mode &= ~current_umask();
1da177e4 4160 do {
078ea3df
TM		 4161 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4162 trace_nfs4_mknod(dir, &dentry->d_name, err);
4163 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4164 &exception);
4165 } while (exception.retry);
aa9c2669
DQ		 4166
4167 nfs4_label_release_security(label);
4168
1da177e4
LT		 4169 return err;
4170}
4171
4172static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4173 struct nfs_fsstat *fsstat)
4174{
4175 struct nfs4_statfs_arg args = {
4176 .fh = fhandle,
4177 .bitmask = server->attr_bitmask,
4178 };
24ad148a
BH		 4179 struct nfs4_statfs_res res = {
4180 .fsstat = fsstat,
4181 };
1da177e4
LT		 4182 struct rpc_message msg = {
4183 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4184 .rpc_argp = &args,
24ad148a 4185 .rpc_resp = &res,
1da177e4
LT		 4186 };
4187
0e574af1 4188 nfs_fattr_init(fsstat->fattr);
7c513058 4189 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4190}
4191
4192static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4193{
4194 struct nfs4_exception exception = { };
4195 int err;
4196 do {
4197 err = nfs4_handle_exception(server,
4198 _nfs4_proc_statfs(server, fhandle, fsstat),
4199 &exception);
4200 } while (exception.retry);
4201 return err;
4202}
4203
4204static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4205 struct nfs_fsinfo *fsinfo)
4206{
4207 struct nfs4_fsinfo_arg args = {
4208 .fh = fhandle,
4209 .bitmask = server->attr_bitmask,
4210 };
3dda5e43
BH		 4211 struct nfs4_fsinfo_res res = {
4212 .fsinfo = fsinfo,
4213 };
1da177e4
LT		 4214 struct rpc_message msg = {
4215 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4216 .rpc_argp = &args,
3dda5e43 4217 .rpc_resp = &res,
1da177e4
LT		 4218 };
4219
7c513058 4220 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4221}
4222
4223static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4224{
4225 struct nfs4_exception exception = { };
83ca7f5a 4226 unsigned long now = jiffies;
1da177e4
LT		 4227 int err;
4228
4229 do {
83ca7f5a 4230 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4231 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 4232 if (err == 0) {
4233 struct nfs_client *clp = server->nfs_client;
4234
4235 spin_lock(&clp->cl_lock);
4236 clp->cl_lease_time = fsinfo->lease_time * HZ;
4237 clp->cl_last_renewal = now;
4238 spin_unlock(&clp->cl_lock);
4239 break;
4240 }
4241 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4242 } while (exception.retry);
4243 return err;
4244}
4245
4246static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4247{
e38eb650
BS		 4248 int error;
4249
0e574af1 4250 nfs_fattr_init(fsinfo->fattr);
e38eb650 4251 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4252 if (error == 0) {
4253 /* block layout checks this! */
4254 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4255 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4256 }
e38eb650
BS		 4257
4258 return error;
1da177e4
LT		 4259}
4260
4261static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4262 struct nfs_pathconf *pathconf)
4263{
4264 struct nfs4_pathconf_arg args = {
4265 .fh = fhandle,
4266 .bitmask = server->attr_bitmask,
4267 };
d45b2989
BH		 4268 struct nfs4_pathconf_res res = {
4269 .pathconf = pathconf,
4270 };
1da177e4
LT		 4271 struct rpc_message msg = {
4272 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4273 .rpc_argp = &args,
d45b2989 4274 .rpc_resp = &res,
1da177e4
LT		 4275 };
4276
4277 /* None of the pathconf attributes are mandatory to implement */
4278 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4279 memset(pathconf, 0, sizeof(*pathconf));
4280 return 0;
4281 }
4282
0e574af1 4283 nfs_fattr_init(pathconf->fattr);
7c513058 4284 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4285}
4286
4287static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4288 struct nfs_pathconf *pathconf)
4289{
4290 struct nfs4_exception exception = { };
4291 int err;
4292
4293 do {
4294 err = nfs4_handle_exception(server,
4295 _nfs4_proc_pathconf(server, fhandle, pathconf),
4296 &exception);
4297 } while (exception.retry);
4298 return err;
4299}
4300
5521abfd 4301int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4302 const struct nfs_open_context *ctx,
4303 const struct nfs_lock_context *l_ctx,
4304 fmode_t fmode)
4305{
4306 const struct nfs_lockowner *lockowner = NULL;
4307
4308 if (l_ctx != NULL)
4309 lockowner = &l_ctx->lockowner;
abf4e13c 4310 return nfs4_select_rw_stateid(ctx->state, fmode, lockowner, stateid, NULL);
9b206149
TM		 4311}
4312EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4313
5521abfd
TM		 4314static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4315 const struct nfs_open_context *ctx,
4316 const struct nfs_lock_context *l_ctx,
4317 fmode_t fmode)
4318{
4319 nfs4_stateid current_stateid;
4320
e1253be0
TM		 4321 /* If the current stateid represents a lost lock, then exit */
4322 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4323 return true;
5521abfd
TM		 4324 return nfs4_stateid_match(stateid, &current_stateid);
4325}
4326
4327static bool nfs4_error_stateid_expired(int err)
4328{
4329 switch (err) {
4330 case -NFS4ERR_DELEG_REVOKED:
4331 case -NFS4ERR_ADMIN_REVOKED:
4332 case -NFS4ERR_BAD_STATEID:
4333 case -NFS4ERR_STALE_STATEID:
4334 case -NFS4ERR_OLD_STATEID:
4335 case -NFS4ERR_OPENMODE:
4336 case -NFS4ERR_EXPIRED:
4337 return true;
4338 }
4339 return false;
4340}
4341
d45f60c6 4342void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4343{
d45f60c6 4344 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4345}
4346
d45f60c6 4347static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4348{
d45f60c6 4349 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4350
d45f60c6
WAA		 4351 trace_nfs4_read(hdr, task->tk_status);
4352 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4353 hdr->args.context->state,
4354 NULL) == -EAGAIN) {
d00c5d43 4355 rpc_restart_call_prepare(task);
ec06c096 4356 return -EAGAIN;
1da177e4 4357 }
8850df99 4358
d45f60c6 4359 __nfs4_read_done_cb(hdr);
1da177e4 4360 if (task->tk_status > 0)
d45f60c6 4361 renew_lease(server, hdr->timestamp);
ec06c096 4362 return 0;
1da177e4
LT		 4363}
4364
5521abfd 4365static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4366 struct nfs_pgio_args *args)
5521abfd
TM		 4367{
4368
4369 if (!nfs4_error_stateid_expired(task->tk_status) ||
4370 nfs4_stateid_is_current(&args->stateid,
4371 args->context,
4372 args->lock_context,
4373 FMODE_READ))
4374 return false;
4375 rpc_restart_call_prepare(task);
4376 return true;
4377}
4378
d45f60c6 4379static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4380{
4381
4382 dprintk("--> %s\n", __func__);
4383
d45f60c6 4384 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4385 return -EAGAIN;
d45f60c6 4386 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4387 return -EAGAIN;
d45f60c6
WAA		 4388 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4389 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4390}
4391
d45f60c6
WAA		 4392static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4393 struct rpc_message *msg)
1da177e4 4394{
d45f60c6
WAA		 4395 hdr->timestamp = jiffies;
4396 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4397 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4398 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4399}
4400
d45f60c6
WAA		 4401static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4402 struct nfs_pgio_header *hdr)
ea7c3303 4403{
d45f60c6
WAA		 4404 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4405 &hdr->args.seq_args,
4406 &hdr->res.seq_res,
9b206149 4407 task))
ef1820f9 4408 return 0;
d45f60c6
WAA		 4409 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4410 hdr->args.lock_context,
4411 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4412 return -EIO;
d45f60c6 4413 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4414 return -EIO;
4415 return 0;
1da177e4
LT		 4416}
4417
d45f60c6
WAA		 4418static int nfs4_write_done_cb(struct rpc_task *task,
4419 struct nfs_pgio_header *hdr)
1da177e4 4420{
d45f60c6 4421 struct inode *inode = hdr->inode;
8478eaa1 4422
d45f60c6
WAA		 4423 trace_nfs4_write(hdr, task->tk_status);
4424 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4425 hdr->args.context->state,
4426 NULL) == -EAGAIN) {
d00c5d43 4427 rpc_restart_call_prepare(task);
788e7a89 4428 return -EAGAIN;
1da177e4 4429 }
4f9838c7 4430 if (task->tk_status >= 0) {
d45f60c6 4431 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4432 nfs_writeback_update_inode(hdr);
4f9838c7 4433 }
788e7a89 4434 return 0;
1da177e4
LT		 4435}
4436
5521abfd 4437static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4438 struct nfs_pgio_args *args)
5521abfd
TM		 4439{
4440
4441 if (!nfs4_error_stateid_expired(task->tk_status) ||
4442 nfs4_stateid_is_current(&args->stateid,
4443 args->context,
4444 args->lock_context,
4445 FMODE_WRITE))
4446 return false;
4447 rpc_restart_call_prepare(task);
4448 return true;
4449}
4450
d45f60c6 4451static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4452{
d45f60c6 4453 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4454 return -EAGAIN;
d45f60c6 4455 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4456 return -EAGAIN;
d45f60c6
WAA		 4457 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4458 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4459}
4460
5a37f851 4461static
d45f60c6 4462bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4463{
5a37f851 4464 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4465 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4466 return false;
4467 /* Otherwise, request attributes if and only if we don't hold
4468 * a delegation
4469 */
011e2a7f 4470 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4471}
a69aef14 4472
d45f60c6
WAA		 4473static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4474 struct rpc_message *msg)
1da177e4 4475{
d45f60c6 4476 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4477
d45f60c6
WAA		 4478 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4479 hdr->args.bitmask = NULL;
4480 hdr->res.fattr = NULL;
7ffd1064 4481 } else
d45f60c6 4482 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4483
d45f60c6
WAA		 4484 if (!hdr->pgio_done_cb)
4485 hdr->pgio_done_cb = nfs4_write_done_cb;
4486 hdr->res.server = server;
4487 hdr->timestamp = jiffies;
1da177e4 4488
bdc7f021 4489 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4490 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4491}
4492
0b7c0153 4493static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4494{
d9afbd1b
TM		 4495 nfs4_setup_sequence(NFS_SERVER(data->inode),
4496 &data->args.seq_args,
4497 &data->res.seq_res,
4498 task);
1da177e4
LT		 4499}
4500
0b7c0153 4501static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4502{
1da177e4 4503 struct inode *inode = data->inode;
14516c3a 4504
cc668ab3 4505 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4506 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4507 NULL, NULL) == -EAGAIN) {
d00c5d43 4508 rpc_restart_call_prepare(task);
788e7a89 4509 return -EAGAIN;
1da177e4 4510 }
788e7a89 4511 return 0;
1da177e4
LT		 4512}
4513
0b7c0153 4514static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4515{
4516 if (!nfs4_sequence_done(task, &data->res.seq_res))
4517 return -EAGAIN;
0b7c0153 4518 return data->commit_done_cb(task, data);
5f452431
FI		 4519}
4520
0b7c0153 4521static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4522{
788e7a89 4523 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4524
0b7c0153
FI		 4525 if (data->commit_done_cb == NULL)
4526 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4527 data->res.server = server;
bdc7f021 4528 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4529 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4530}
4531
9bc4e3ca
CL		 4532struct nfs4_renewdata {
4533 struct nfs_client *client;
4534 unsigned long timestamp;
4535};
4536
1da177e4
LT		 4537/*
4538 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4539 * standalone procedure for queueing an asynchronous RENEW.
4540 */
9bc4e3ca 4541static void nfs4_renew_release(void *calldata)
dc96aef9 4542{
9bc4e3ca
CL		 4543 struct nfs4_renewdata *data = calldata;
4544 struct nfs_client *clp = data->client;
dc96aef9 4545
0851de06
AB		 4546 if (atomic_read(&clp->cl_count) > 1)
4547 nfs4_schedule_state_renewal(clp);
4548 nfs_put_client(clp);
9bc4e3ca 4549 kfree(data);
dc96aef9
AB		 4550}
4551
9bc4e3ca 4552static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4553{
9bc4e3ca
CL		 4554 struct nfs4_renewdata *data = calldata;
4555 struct nfs_client *clp = data->client;
4556 unsigned long timestamp = data->timestamp;
1da177e4 4557
c6d01c6f 4558 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4559 switch (task->tk_status) {
4560 case 0:
4561 break;
4562 case -NFS4ERR_LEASE_MOVED:
4563 nfs4_schedule_lease_moved_recovery(clp);
4564 break;
4565 default:
95baa25c 4566 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4567 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4568 return;
4569 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4570 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4571 return;
4572 }
4573 nfs4_schedule_path_down_recovery(clp);
1da177e4 4574 }
452e9352 4575 do_renew_lease(clp, timestamp);
1da177e4
LT		 4576}
4577
963d8fe5
TM		 4578static const struct rpc_call_ops nfs4_renew_ops = {
4579 .rpc_call_done = nfs4_renew_done,
dc96aef9 4580 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4581};
4582
2f60ea6b 4583static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4584{
4585 struct rpc_message msg = {
4586 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4587 .rpc_argp = clp,
b4454fe1 4588 .rpc_cred = cred,
1da177e4 4589 };
9bc4e3ca 4590 struct nfs4_renewdata *data;
1da177e4 4591
2f60ea6b
TM		 4592 if (renew_flags == 0)
4593 return 0;
0851de06
AB		 4594 if (!atomic_inc_not_zero(&clp->cl_count))
4595 return -EIO;
b569ad34 4596 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4597 if (data == NULL)
4598 return -ENOMEM;
4599 data->client = clp;
4600 data->timestamp = jiffies;
bc7a05ca 4601 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4602 &nfs4_renew_ops, data);
1da177e4
LT		 4603}
4604
8534d4ec 4605static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4606{
4607 struct rpc_message msg = {
4608 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4609 .rpc_argp = clp,
b4454fe1 4610 .rpc_cred = cred,
1da177e4
LT		 4611 };
4612 unsigned long now = jiffies;
4613 int status;
4614
bc7a05ca 4615 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4616 if (status < 0)
4617 return status;
452e9352 4618 do_renew_lease(clp, now);
1da177e4
LT		 4619 return 0;
4620}
4621
aa1870af
BF		 4622static inline int nfs4_server_supports_acls(struct nfs_server *server)
4623{
7dd7d959 4624 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4625}
4626
21f498c2
TM		 4627/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4628 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4629 * the stack.
4630 */
21f498c2 4631#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4632
e9e3d724 4633static int buf_to_pages_noslab(const void *buf, size_t buflen,
8fbcf237 4634 struct page **pages)
e9e3d724
NH		 4635{
4636 struct page *newpage, **spages;
4637 int rc = 0;
4638 size_t len;
4639 spages = pages;
4640
4641 do {
21f498c2 4642 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4643 newpage = alloc_page(GFP_KERNEL);
4644
4645 if (newpage == NULL)
4646 goto unwind;
4647 memcpy(page_address(newpage), buf, len);
4648 buf += len;
4649 buflen -= len;
4650 *pages++ = newpage;
4651 rc++;
4652 } while (buflen != 0);
4653
4654 return rc;
4655
4656unwind:
4657 for(; rc > 0; rc--)
4658 __free_page(spages[rc-1]);
4659 return -ENOMEM;
4660}
4661
e50a1c2e
BF		 4662struct nfs4_cached_acl {
4663 int cached;
4664 size_t len;
3e9d4154 4665 char data[0];
e50a1c2e
BF		 4666};
4667
4668static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4669{
4670 struct nfs_inode *nfsi = NFS_I(inode);
4671
4672 spin_lock(&inode->i_lock);
4673 kfree(nfsi->nfs4_acl);
4674 nfsi->nfs4_acl = acl;
4675 spin_unlock(&inode->i_lock);
4676}
4677
4678static void nfs4_zap_acl_attr(struct inode *inode)
4679{
4680 nfs4_set_cached_acl(inode, NULL);
4681}
4682
4683static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4684{
4685 struct nfs_inode *nfsi = NFS_I(inode);
4686 struct nfs4_cached_acl *acl;
4687 int ret = -ENOENT;
4688
4689 spin_lock(&inode->i_lock);
4690 acl = nfsi->nfs4_acl;
4691 if (acl == NULL)
4692 goto out;
4693 if (buf == NULL) /* user is just asking for length */
4694 goto out_len;
4695 if (acl->cached == 0)
4696 goto out;
4697 ret = -ERANGE; /* see getxattr(2) man page */
4698 if (acl->len > buflen)
4699 goto out;
4700 memcpy(buf, acl->data, acl->len);
4701out_len:
4702 ret = acl->len;
4703out:
4704 spin_unlock(&inode->i_lock);
4705 return ret;
4706}
4707
5794d21e 4708static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4709{
4710 struct nfs4_cached_acl *acl;
b291f1b1 4711 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4712
1f1ea6c2 4713 if (buflen <= PAGE_SIZE) {
b291f1b1 4714 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4715 if (acl == NULL)
4716 goto out;
4717 acl->cached = 1;
5794d21e 4718 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4719 } else {
4720 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4721 if (acl == NULL)
4722 goto out;
4723 acl->cached = 0;
4724 }
4725 acl->len = acl_len;
4726out:
4727 nfs4_set_cached_acl(inode, acl);
4728}
4729
bf118a34
AA		 4730/*
4731 * The getxattr API returns the required buffer length when called with a
4732 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4733 * the required buf. On a NULL buf, we send a page of data to the server
4734 * guessing that the ACL request can be serviced by a page. If so, we cache
4735 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4736 * the cache. If not so, we throw away the page, and cache the required
4737 * length. The next getxattr call will then produce another round trip to
4738 * the server, this time with the input buf of the required size.
4739 */
16b4289c 4740static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4741{
bf118a34 4742 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4743 struct nfs_getaclargs args = {
4744 .fh = NFS_FH(inode),
4745 .acl_pages = pages,
4746 .acl_len = buflen,
4747 };
663c79b3
BH		 4748 struct nfs_getaclres res = {
4749 .acl_len = buflen,
4750 };
aa1870af
BF		 4751 struct rpc_message msg = {
4752 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4753 .rpc_argp = &args,
663c79b3 4754 .rpc_resp = &res,
aa1870af 4755 };
21f498c2
TM		 4756 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4757 int ret = -ENOMEM, i;
aa1870af 4758
bf118a34
AA		 4759 /* As long as we're doing a round trip to the server anyway,
4760 * let's be prepared for a page of acl data. */
4761 if (npages == 0)
4762 npages = 1;
21f498c2
TM		 4763 if (npages > ARRAY_SIZE(pages))
4764 return -ERANGE;
5a006899 4765
bf118a34
AA		 4766 for (i = 0; i < npages; i++) {
4767 pages[i] = alloc_page(GFP_KERNEL);
4768 if (!pages[i])
4769 goto out_free;
e50a1c2e 4770 }
5a006899
SP		 4771
4772 /* for decoding across pages */
4773 res.acl_scratch = alloc_page(GFP_KERNEL);
4774 if (!res.acl_scratch)
4775 goto out_free;
4776
bf118a34 4777 args.acl_len = npages * PAGE_SIZE;
5a006899 4778
de040bec 4779 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4780 __func__, buf, buflen, npages, args.acl_len);
4781 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4782 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4783 if (ret)
4784 goto out_free;
bf118a34 4785
1f1ea6c2
TM		 4786 /* Handle the case where the passed-in buffer is too short */
4787 if (res.acl_flags & NFS4_ACL_TRUNC) {
4788 /* Did the user only issue a request for the acl length? */
4789 if (buf == NULL)
4790 goto out_ok;
e50a1c2e 4791 ret = -ERANGE;
1f1ea6c2 4792 goto out_free;
e50a1c2e 4793 }
1f1ea6c2 4794 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4795 if (buf) {
4796 if (res.acl_len > buflen) {
4797 ret = -ERANGE;
4798 goto out_free;
4799 }
1f1ea6c2 4800 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4801 }
1f1ea6c2
TM		 4802out_ok:
4803 ret = res.acl_len;
e50a1c2e 4804out_free:
bf118a34
AA		 4805 for (i = 0; i < npages; i++)
4806 if (pages[i])
4807 __free_page(pages[i]);
331818f1
TM		 4808 if (res.acl_scratch)
4809 __free_page(res.acl_scratch);
aa1870af
BF		 4810 return ret;
4811}
4812
16b4289c
TM		 4813static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4814{
4815 struct nfs4_exception exception = { };
4816 ssize_t ret;
4817 do {
4818 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4819 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4820 if (ret >= 0)
4821 break;
4822 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4823 } while (exception.retry);
4824 return ret;
4825}
4826
e50a1c2e
BF		 4827static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4828{
4829 struct nfs_server *server = NFS_SERVER(inode);
4830 int ret;
4831
4832 if (!nfs4_server_supports_acls(server))
4833 return -EOPNOTSUPP;
4834 ret = nfs_revalidate_inode(server, inode);
4835 if (ret < 0)
4836 return ret;
08a22b39
AK		 4837 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4838 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4839 ret = nfs4_read_cached_acl(inode, buf, buflen);
4840 if (ret != -ENOENT)
bf118a34
AA		 4841 /* -ENOENT is returned if there is no ACL or if there is an ACL
4842 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4843 return ret;
4844 return nfs4_get_acl_uncached(inode, buf, buflen);
4845}
4846
16b4289c 4847static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4848{
4849 struct nfs_server *server = NFS_SERVER(inode);
4850 struct page *pages[NFS4ACL_MAXPAGES];
4851 struct nfs_setaclargs arg = {
4852 .fh = NFS_FH(inode),
4853 .acl_pages = pages,
4854 .acl_len = buflen,
4855 };
73c403a9 4856 struct nfs_setaclres res;
4b580ee3
BF		 4857 struct rpc_message msg = {
4858 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4859 .rpc_argp = &arg,
73c403a9 4860 .rpc_resp = &res,
4b580ee3 4861 };
21f498c2 4862 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4863 int ret, i;
4b580ee3
BF		 4864
4865 if (!nfs4_server_supports_acls(server))
4866 return -EOPNOTSUPP;
21f498c2
TM		 4867 if (npages > ARRAY_SIZE(pages))
4868 return -ERANGE;
8fbcf237 4869 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
e9e3d724
NH		 4870 if (i < 0)
4871 return i;
57ec14c5 4872 nfs4_inode_return_delegation(inode);
7c513058 4873 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4874
4875 /*
4876 * Free each page after tx, so the only ref left is
4877 * held by the network stack
4878 */
4879 for (; i > 0; i--)
4880 put_page(pages[i-1]);
4881
08a22b39
AK		 4882 /*
4883 * Acl update can result in inode attribute update.
4884 * so mark the attribute cache invalid.
4885 */
4886 spin_lock(&inode->i_lock);
4887 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4888 spin_unlock(&inode->i_lock);
f41f7418
TM		 4889 nfs_access_zap_cache(inode);
4890 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4891 return ret;
4892}
4893
16b4289c
TM		 4894static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4895{
4896 struct nfs4_exception exception = { };
4897 int err;
4898 do {
c1578b76
TM		 4899 err = __nfs4_proc_set_acl(inode, buf, buflen);
4900 trace_nfs4_set_acl(inode, err);
4901 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4902 &exception);
4903 } while (exception.retry);
4904 return err;
4905}
4906
aa9c2669
DQ		 4907#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4908static int _nfs4_get_security_label(struct inode *inode, void *buf,
4909 size_t buflen)
4910{
4911 struct nfs_server *server = NFS_SERVER(inode);
4912 struct nfs_fattr fattr;
4913 struct nfs4_label label = {0, 0, buflen, buf};
4914
4915 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4916 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4917 .fh = NFS_FH(inode),
4918 .bitmask = bitmask,
4919 };
4920 struct nfs4_getattr_res res = {
4921 .fattr = &fattr,
4922 .label = &label,
4923 .server = server,
4924 };
4925 struct rpc_message msg = {
4926 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4927 .rpc_argp = &arg,
aa9c2669
DQ		 4928 .rpc_resp = &res,
4929 };
4930 int ret;
4931
4932 nfs_fattr_init(&fattr);
4933
fcb63a9b 4934 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4935 if (ret)
4936 return ret;
4937 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4938 return -ENOENT;
4939 if (buflen < label.len)
4940 return -ERANGE;
4941 return 0;
4942}
4943
4944static int nfs4_get_security_label(struct inode *inode, void *buf,
4945 size_t buflen)
4946{
4947 struct nfs4_exception exception = { };
4948 int err;
4949
4950 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4951 return -EOPNOTSUPP;
4952
4953 do {
c1578b76
TM		 4954 err = _nfs4_get_security_label(inode, buf, buflen);
4955 trace_nfs4_get_security_label(inode, err);
4956 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4957 &exception);
4958 } while (exception.retry);
4959 return err;
4960}
4961
4962static int _nfs4_do_set_security_label(struct inode *inode,
4963 struct nfs4_label *ilabel,
4964 struct nfs_fattr *fattr,
4965 struct nfs4_label *olabel)
4966{
4967
4968 struct iattr sattr = {0};
4969 struct nfs_server *server = NFS_SERVER(inode);
4970 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4971 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4972 .fh = NFS_FH(inode),
4973 .iap = &sattr,
4974 .server = server,
4975 .bitmask = bitmask,
4976 .label = ilabel,
4977 };
4978 struct nfs_setattrres res = {
4979 .fattr = fattr,
4980 .label = olabel,
4981 .server = server,
4982 };
4983 struct rpc_message msg = {
4984 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4985 .rpc_argp = &arg,
aa9c2669
DQ		 4986 .rpc_resp = &res,
4987 };
4988 int status;
4989
12207f69 4990 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4991
12207f69 4992 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4993 if (status)
4994 dprintk("%s failed: %d\n", __func__, status);
4995
4996 return status;
4997}
4998
4999static int nfs4_do_set_security_label(struct inode *inode,
5000 struct nfs4_label *ilabel,
5001 struct nfs_fattr *fattr,
5002 struct nfs4_label *olabel)
5003{
5004 struct nfs4_exception exception = { };
5005 int err;
5006
5007 do {
c1578b76
TM		 5008 err = _nfs4_do_set_security_label(inode, ilabel,
5009 fattr, olabel);
5010 trace_nfs4_set_security_label(inode, err);
5011 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 5012 &exception);
5013 } while (exception.retry);
5014 return err;
5015}
5016
5017static int
59301226 5018nfs4_set_security_label(struct inode *inode, const void *buf, size_t buflen)
aa9c2669
DQ		 5019{
5020 struct nfs4_label ilabel, *olabel = NULL;
5021 struct nfs_fattr fattr;
5022 struct rpc_cred *cred;
aa9c2669
DQ		 5023 int status;
5024
5025 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5026 return -EOPNOTSUPP;
5027
5028 nfs_fattr_init(&fattr);
5029
5030 ilabel.pi = 0;
5031 ilabel.lfs = 0;
5032 ilabel.label = (char *)buf;
5033 ilabel.len = buflen;
5034
5035 cred = rpc_lookup_cred();
5036 if (IS_ERR(cred))
5037 return PTR_ERR(cred);
5038
5039 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5040 if (IS_ERR(olabel)) {
5041 status = -PTR_ERR(olabel);
5042 goto out;
5043 }
5044
5045 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5046 if (status == 0)
5047 nfs_setsecurity(inode, &fattr, olabel);
5048
5049 nfs4_label_free(olabel);
5050out:
5051 put_rpccred(cred);
5052 return status;
5053}
5054#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5055
5056
f092075d
CL		 5057static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5058 nfs4_verifier *bootverf)
cd93710e
CL		 5059{
5060 __be32 verf[2];
5061
2c820d9a
CL		 5062 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5063 /* An impossible timestamp guarantees this value
5064 * will never match a generated boot time. */
5065 verf[0] = 0;
17f26b12 5066 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 5067 } else {
f092075d 5068 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 5069 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
5070 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 5071 }
cd93710e
CL		 5072 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5073}
5074
a3192688
JL		 5075static int
5076nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 5077{
a3192688
JL		 5078 size_t len;
5079 char *str;
e984a55a 5080
ceb3a16c 5081 if (clp->cl_owner_id != NULL)
a3192688 5082 return 0;
4a3e5779 5083
a3192688 5084 rcu_read_lock();
4a70316c 5085 len = 14 + strlen(clp->cl_ipaddr) + 1 +
a3192688
JL		 5086 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5087 1 +
5088 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5089 1;
5090 rcu_read_unlock();
5091
5092 if (len > NFS4_OPAQUE_LIMIT + 1)
5093 return -EINVAL;
5094
5095 /*
5096 * Since this string is allocated at mount time, and held until the
5097 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5098 * about a memory-reclaim deadlock.
5099 */
5100 str = kmalloc(len, GFP_KERNEL);
5101 if (!str)
5102 return -ENOMEM;
ceb3a16c 5103
e984a55a 5104 rcu_read_lock();
f2dd436e 5105 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
a3192688
JL		 5106 clp->cl_ipaddr,
5107 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5108 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5109 rcu_read_unlock();
a3192688 5110
a3192688
JL		 5111 clp->cl_owner_id = str;
5112 return 0;
e984a55a
CL		 5113}
5114
873e3851
JL		 5115static int
5116nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5117{
873e3851
JL		 5118 size_t len;
5119 char *str;
5120
5121 len = 10 + 10 + 1 + 10 + 1 +
5122 strlen(nfs4_client_id_uniquifier) + 1 +
5123 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5124
5125 if (len > NFS4_OPAQUE_LIMIT + 1)
5126 return -EINVAL;
5127
5128 /*
5129 * Since this string is allocated at mount time, and held until the
5130 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5131 * about a memory-reclaim deadlock.
5132 */
5133 str = kmalloc(len, GFP_KERNEL);
5134 if (!str)
5135 return -ENOMEM;
5136
f2dd436e 5137 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
873e3851
JL		 5138 clp->rpc_ops->version, clp->cl_minorversion,
5139 nfs4_client_id_uniquifier,
5140 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5141 clp->cl_owner_id = str;
5142 return 0;
5143}
5144
5145static int
5146nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5147{
873e3851
JL		 5148 size_t len;
5149 char *str;
ceb3a16c
TM		 5150
5151 if (clp->cl_owner_id != NULL)
873e3851 5152 return 0;
6f2ea7f2
CL		 5153
5154 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5155 return nfs4_init_uniquifier_client_string(clp);
5156
5157 len = 10 + 10 + 1 + 10 + 1 +
5158 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5159
5160 if (len > NFS4_OPAQUE_LIMIT + 1)
5161 return -EINVAL;
5162
5163 /*
5164 * Since this string is allocated at mount time, and held until the
5165 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5166 * about a memory-reclaim deadlock.
5167 */
5168 str = kmalloc(len, GFP_KERNEL);
5169 if (!str)
5170 return -ENOMEM;
5171
f2dd436e 5172 scnprintf(str, len, "Linux NFSv%u.%u %s",
873e3851
JL		 5173 clp->rpc_ops->version, clp->cl_minorversion,
5174 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5175 clp->cl_owner_id = str;
5176 return 0;
e984a55a
CL		 5177}
5178
706cb8db
CL		 5179/*
5180 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5181 * services. Advertise one based on the address family of the
5182 * clientaddr.
5183 */
5184static unsigned int
5185nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5186{
5187 if (strchr(clp->cl_ipaddr, ':') != NULL)
5188 return scnprintf(buf, len, "tcp6");
5189 else
5190 return scnprintf(buf, len, "tcp");
5191}
5192
f11b2a1c
JL		 5193static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5194{
5195 struct nfs4_setclientid *sc = calldata;
5196
5197 if (task->tk_status == 0)
5198 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5199}
5200
5201static const struct rpc_call_ops nfs4_setclientid_ops = {
5202 .rpc_call_done = nfs4_setclientid_done,
5203};
5204
6bbb4ae8
CL		 5205/**
5206 * nfs4_proc_setclientid - Negotiate client ID
5207 * @clp: state data structure
5208 * @program: RPC program for NFSv4 callback service
5209 * @port: IP port number for NFS4 callback service
5210 * @cred: RPC credential to use for this call
5211 * @res: where to place the result
5212 *
5213 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5214 */
bb8b27e5
TM		 5215int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5216 unsigned short port, struct rpc_cred *cred,
5217 struct nfs4_setclientid_res *res)
1da177e4
LT		 5218{
5219 nfs4_verifier sc_verifier;
5220 struct nfs4_setclientid setclientid = {
5221 .sc_verifier = &sc_verifier,
5222 .sc_prog = program,
3a6bb738 5223 .sc_clnt = clp,
1da177e4
LT		 5224 };
5225 struct rpc_message msg = {
5226 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5227 .rpc_argp = &setclientid,
bb8b27e5 5228 .rpc_resp = res,
286d7d6a 5229 .rpc_cred = cred,
1da177e4 5230 };
f11b2a1c
JL		 5231 struct rpc_task *task;
5232 struct rpc_task_setup task_setup_data = {
5233 .rpc_client = clp->cl_rpcclient,
5234 .rpc_message = &msg,
5235 .callback_ops = &nfs4_setclientid_ops,
5236 .callback_data = &setclientid,
5237 .flags = RPC_TASK_TIMEOUT,
5238 };
6bbb4ae8 5239 int status;
1da177e4 5240
de734831 5241 /* nfs_client_id4 */
f092075d 5242 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5243
5244 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5245 status = nfs4_init_uniform_client_string(clp);
5246 else
a3192688 5247 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5248
5249 if (status)
5250 goto out;
3a6bb738 5251
de734831 5252 /* cb_client4 */
706cb8db
CL		 5253 setclientid.sc_netid_len =
5254 nfs4_init_callback_netid(clp,
5255 setclientid.sc_netid,
5256 sizeof(setclientid.sc_netid));
de734831 5257 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5258 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5259 clp->cl_ipaddr, port >> 8, port & 255);
5260
3a6bb738 5261 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5262 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5263 clp->cl_owner_id);
f11b2a1c
JL		 5264 task = rpc_run_task(&task_setup_data);
5265 if (IS_ERR(task)) {
5266 status = PTR_ERR(task);
5267 goto out;
5268 }
5269 status = task->tk_status;
5270 if (setclientid.sc_cred) {
5271 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5272 put_rpccred(setclientid.sc_cred);
5273 }
5274 rpc_put_task(task);
5275out:
c6d01c6f 5276 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5277 dprintk("NFS reply setclientid: %d\n", status);
5278 return status;
1da177e4
LT		 5279}
5280
6bbb4ae8
CL		 5281/**
5282 * nfs4_proc_setclientid_confirm - Confirm client ID
5283 * @clp: state data structure
5284 * @res: result of a previous SETCLIENTID
5285 * @cred: RPC credential to use for this call
5286 *
5287 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5288 */
fd954ae1 5289int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5290 struct nfs4_setclientid_res *arg,
5291 struct rpc_cred *cred)
1da177e4 5292{
1da177e4
LT		 5293 struct rpc_message msg = {
5294 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5295 .rpc_argp = arg,
286d7d6a 5296 .rpc_cred = cred,
1da177e4 5297 };
1da177e4
LT		 5298 int status;
5299
6bbb4ae8
CL		 5300 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5301 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5302 clp->cl_clientid);
1bd714f2 5303 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5304 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5305 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5306 return status;
5307}
5308
fe650407
TM		 5309struct nfs4_delegreturndata {
5310 struct nfs4_delegreturnargs args;
fa178f29 5311 struct nfs4_delegreturnres res;
fe650407
TM		 5312 struct nfs_fh fh;
5313 nfs4_stateid stateid;
26e976a8 5314 unsigned long timestamp;
fa178f29 5315 struct nfs_fattr fattr;
fe650407 5316 int rpc_status;
039b756a
PT		 5317 struct inode *inode;
5318 bool roc;
5319 u32 roc_barrier;
fe650407
TM		 5320};
5321
fe650407
TM		 5322static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5323{
5324 struct nfs4_delegreturndata *data = calldata;
938e1010 5325
14516c3a
TM		 5326 if (!nfs4_sequence_done(task, &data->res.seq_res))
5327 return;
938e1010 5328
ca8acf8d 5329 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5330 switch (task->tk_status) {
79708861 5331 case 0:
fa178f29 5332 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5333 case -NFS4ERR_ADMIN_REVOKED:
5334 case -NFS4ERR_DELEG_REVOKED:
5335 case -NFS4ERR_BAD_STATEID:
5336 case -NFS4ERR_OLD_STATEID:
5337 case -NFS4ERR_STALE_STATEID:
5338 case -NFS4ERR_EXPIRED:
5339 task->tk_status = 0;
039b756a
PT		 5340 if (data->roc)
5341 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5342 break;
79708861 5343 default:
8478eaa1
N		 5344 if (nfs4_async_handle_error(task, data->res.server,
5345 NULL, NULL) == -EAGAIN) {
d00c5d43 5346 rpc_restart_call_prepare(task);
79708861
RL		 5347 return;
5348 }
5349 }
5350 data->rpc_status = task->tk_status;
fe650407
TM		 5351}
5352
5353static void nfs4_delegreturn_release(void *calldata)
5354{
039b756a 5355 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5356 struct inode *inode = data->inode;
039b756a 5357
ea7c38fe
TM		 5358 if (inode) {
5359 if (data->roc)
5360 pnfs_roc_release(inode);
5361 nfs_iput_and_deactive(inode);
5362 }
fe650407
TM		 5363 kfree(calldata);
5364}
5365
938e1010
AA		 5366static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5367{
5368 struct nfs4_delegreturndata *d_data;
5369
5370 d_data = (struct nfs4_delegreturndata *)data;
5371
500d701f
PT		 5372 if (nfs4_wait_on_layoutreturn(d_data->inode, task))
5373 return;
5374
4ff376fe
TM		 5375 if (d_data->roc)
5376 pnfs_roc_get_barrier(d_data->inode, &d_data->roc_barrier);
039b756a 5377
d9afbd1b
TM		 5378 nfs4_setup_sequence(d_data->res.server,
5379 &d_data->args.seq_args,
5380 &d_data->res.seq_res,
5381 task);
938e1010 5382}
938e1010 5383
c8d149f3 5384static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5385 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5386 .rpc_call_done = nfs4_delegreturn_done,
5387 .rpc_release = nfs4_delegreturn_release,
5388};
5389
e6f81075 5390static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5391{
5392 struct nfs4_delegreturndata *data;
fa178f29 5393 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5394 struct rpc_task *task;
5138fde0
TM		 5395 struct rpc_message msg = {
5396 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5397 .rpc_cred = cred,
5398 };
c970aa85
TM		 5399 struct rpc_task_setup task_setup_data = {
5400 .rpc_client = server->client,
5138fde0 5401 .rpc_message = &msg,
c970aa85
TM		 5402 .callback_ops = &nfs4_delegreturn_ops,
5403 .flags = RPC_TASK_ASYNC,
5404 };
e6f81075 5405 int status = 0;
fe650407 5406
8535b2be 5407 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5408 if (data == NULL)
5409 return -ENOMEM;
a9c92d6b 5410 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
99ade3c7
AE		 5411
5412 nfs4_state_protect(server->nfs_client,
5413 NFS_SP4_MACH_CRED_CLEANUP,
5414 &task_setup_data.rpc_client, &msg);
5415
fe650407
TM		 5416 data->args.fhandle = &data->fh;
5417 data->args.stateid = &data->stateid;
9e907fec 5418 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5419 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5420 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5421 data->res.fattr = &data->fattr;
5422 data->res.server = server;
5138fde0 5423 nfs_fattr_init(data->res.fattr);
26e976a8 5424 data->timestamp = jiffies;
fe650407 5425 data->rpc_status = 0;
ea7c38fe
TM		 5426 data->inode = nfs_igrab_and_active(inode);
5427 if (data->inode)
5428 data->roc = nfs4_roc(inode);
fe650407 5429
c970aa85 5430 task_setup_data.callback_data = data;
1174dd1f
TM		 5431 msg.rpc_argp = &data->args;
5432 msg.rpc_resp = &data->res;
c970aa85 5433 task = rpc_run_task(&task_setup_data);
7a1218a2 5434 if (IS_ERR(task))
fe650407 5435 return PTR_ERR(task);
e6f81075
TM		 5436 if (!issync)
5437 goto out;
fe650407 5438 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5439 if (status != 0)
5440 goto out;
5441 status = data->rpc_status;
e144cbcc
TM		 5442 if (status == 0)
5443 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5444 else
5445 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5446out:
e6b3c4db 5447 rpc_put_task(task);
fe650407 5448 return status;
1da177e4
LT		 5449}
5450
e6f81075 5451int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5452{
5453 struct nfs_server *server = NFS_SERVER(inode);
5454 struct nfs4_exception exception = { };
5455 int err;
5456 do {
e6f81075 5457 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
48c9579a 5458 trace_nfs4_delegreturn(inode, stateid, err);
1da177e4
LT		 5459 switch (err) {
5460 case -NFS4ERR_STALE_STATEID:
5461 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5462 case 0:
5463 return 0;
5464 }
5465 err = nfs4_handle_exception(server, err, &exception);
5466 } while (exception.retry);
5467 return err;
5468}
5469
5470#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5471#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5472
5473/*
5474 * sleep, with exponential backoff, and retry the LOCK operation.
5475 */
5476static unsigned long
5477nfs4_set_lock_task_retry(unsigned long timeout)
5478{
416ad3c9 5479 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5480 timeout <<= 1;
5481 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5482 return NFS4_LOCK_MAXTIMEOUT;
5483 return timeout;
5484}
5485
1da177e4
LT		 5486static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5487{
5488 struct inode *inode = state->inode;
5489 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5490 struct nfs_client *clp = server->nfs_client;
911d1aaf 5491 struct nfs_lockt_args arg = {
1da177e4 5492 .fh = NFS_FH(inode),
911d1aaf 5493 .fl = request,
1da177e4 5494 };
911d1aaf
TM		 5495 struct nfs_lockt_res res = {
5496 .denied = request,
1da177e4
LT		 5497 };
5498 struct rpc_message msg = {
5499 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5500 .rpc_argp = &arg,
5501 .rpc_resp = &res,
5502 .rpc_cred = state->owner->so_cred,
5503 };
1da177e4
LT		 5504 struct nfs4_lock_state *lsp;
5505 int status;
5506
911d1aaf 5507 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5508 status = nfs4_set_lock_state(state, request);
5509 if (status != 0)
5510 goto out;
5511 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5512 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5513 arg.lock_owner.s_dev = server->s_dev;
7c513058 5514 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5515 switch (status) {
5516 case 0:
5517 request->fl_type = F_UNLCK;
5518 break;
5519 case -NFS4ERR_DENIED:
5520 status = 0;
1da177e4 5521 }
70cc6487 5522 request->fl_ops->fl_release_private(request);
a6f951dd 5523 request->fl_ops = NULL;
8d0a8a9d 5524out:
1da177e4
LT		 5525 return status;
5526}
5527
5528static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5529{
5530 struct nfs4_exception exception = { };
5531 int err;
5532
5533 do {
d1b748a5
TM		 5534 err = _nfs4_proc_getlk(state, cmd, request);
5535 trace_nfs4_get_lock(request, state, cmd, err);
5536 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5537 &exception);
5538 } while (exception.retry);
5539 return err;
5540}
5541
83bfff23 5542static int do_vfs_lock(struct inode *inode, struct file_lock *fl)
1da177e4 5543{
4f656367 5544 return locks_lock_inode_wait(inode, fl);
1da177e4
LT		 5545}
5546
faf5f49c 5547struct nfs4_unlockdata {
911d1aaf
TM		 5548 struct nfs_locku_args arg;
5549 struct nfs_locku_res res;
faf5f49c
TM		 5550 struct nfs4_lock_state *lsp;
5551 struct nfs_open_context *ctx;
911d1aaf 5552 struct file_lock fl;
516285eb 5553 struct nfs_server *server;
26e976a8 5554 unsigned long timestamp;
faf5f49c
TM		 5555};
5556
911d1aaf
TM		 5557static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5558 struct nfs_open_context *ctx,
5559 struct nfs4_lock_state *lsp,
5560 struct nfs_seqid *seqid)
5561{
5562 struct nfs4_unlockdata *p;
5563 struct inode *inode = lsp->ls_state->inode;
5564
8535b2be 5565 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5566 if (p == NULL)
5567 return NULL;
5568 p->arg.fh = NFS_FH(inode);
5569 p->arg.fl = &p->fl;
5570 p->arg.seqid = seqid;
c1d51931 5571 p->res.seqid = seqid;
911d1aaf
TM		 5572 p->lsp = lsp;
5573 atomic_inc(&lsp->ls_count);
5574 /* Ensure we don't close file until we're done freeing locks! */
5575 p->ctx = get_nfs_open_context(ctx);
5576 memcpy(&p->fl, fl, sizeof(p->fl));
5577 p->server = NFS_SERVER(inode);
5578 return p;
5579}
5580
06f814a3 5581static void nfs4_locku_release_calldata(void *data)
faf5f49c 5582{
963d8fe5 5583 struct nfs4_unlockdata *calldata = data;
911d1aaf 5584 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5585 nfs4_put_lock_state(calldata->lsp);
5586 put_nfs_open_context(calldata->ctx);
5587 kfree(calldata);
faf5f49c
TM		 5588}
5589
963d8fe5 5590static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5591{
963d8fe5 5592 struct nfs4_unlockdata *calldata = data;
faf5f49c 5593
14516c3a
TM		 5594 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5595 return;
faf5f49c
TM		 5596 switch (task->tk_status) {
5597 case 0:
26e976a8 5598 renew_lease(calldata->server, calldata->timestamp);
83bfff23 5599 do_vfs_lock(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 5600 if (nfs4_update_lock_stateid(calldata->lsp,
5601 &calldata->res.stateid))
5602 break;
9e33bed5
TM		 5603 case -NFS4ERR_BAD_STATEID:
5604 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5605 case -NFS4ERR_STALE_STATEID:
5606 case -NFS4ERR_EXPIRED:
425c1d4e
TM		 5607 if (!nfs4_stateid_match(&calldata->arg.stateid,
5608 &calldata->lsp->ls_stateid))
5609 rpc_restart_call_prepare(task);
faf5f49c
TM		 5610 break;
5611 default:
8478eaa1
N		 5612 if (nfs4_async_handle_error(task, calldata->server,
5613 NULL, NULL) == -EAGAIN)
d00c5d43 5614 rpc_restart_call_prepare(task);
faf5f49c 5615 }
2b1bc308 5616 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5617}
5618
4ce70ada 5619static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5620{
4ce70ada 5621 struct nfs4_unlockdata *calldata = data;
faf5f49c 5622
911d1aaf 5623 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5624 goto out_wait;
425c1d4e 5625 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5626 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5627 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5628 goto out_no_action;
faf5f49c 5629 }
26e976a8 5630 calldata->timestamp = jiffies;
035168ab 5631 if (nfs4_setup_sequence(calldata->server,
a893693c 5632 &calldata->arg.seq_args,
2240a9e2
TM		 5633 &calldata->res.seq_res,
5634 task) != 0)
5635 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5636 return;
5637out_no_action:
5638 task->tk_action = NULL;
5639out_wait:
5640 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5641}
5642
963d8fe5 5643static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5644 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5645 .rpc_call_done = nfs4_locku_done,
06f814a3 5646 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5647};
5648
a5d16a4d
TM		 5649static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5650 struct nfs_open_context *ctx,
5651 struct nfs4_lock_state *lsp,
5652 struct nfs_seqid *seqid)
5653{
5654 struct nfs4_unlockdata *data;
5138fde0
TM		 5655 struct rpc_message msg = {
5656 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5657 .rpc_cred = ctx->cred,
5658 };
c970aa85
TM		 5659 struct rpc_task_setup task_setup_data = {
5660 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5661 .rpc_message = &msg,
c970aa85 5662 .callback_ops = &nfs4_locku_ops,
101070ca 5663 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5664 .flags = RPC_TASK_ASYNC,
5665 };
a5d16a4d 5666
fa940720
WAA		 5667 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5668 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5669
137d6aca
FF		 5670 /* Ensure this is an unlock - when canceling a lock, the
5671 * canceled lock is passed in, and it won't be an unlock.
5672 */
5673 fl->fl_type = F_UNLCK;
5674
a5d16a4d
TM		 5675 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5676 if (data == NULL) {
5677 nfs_free_seqid(seqid);
5678 return ERR_PTR(-ENOMEM);
5679 }
5680
a9c92d6b 5681 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5682 msg.rpc_argp = &data->arg;
5683 msg.rpc_resp = &data->res;
c970aa85
TM		 5684 task_setup_data.callback_data = data;
5685 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5686}
5687
faf5f49c
TM		 5688static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5689{
65b62a29
TM		 5690 struct inode *inode = state->inode;
5691 struct nfs4_state_owner *sp = state->owner;
5692 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5693 struct nfs_seqid *seqid;
1da177e4 5694 struct nfs4_lock_state *lsp;
06f814a3 5695 struct rpc_task *task;
b4019c0e 5696 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 5697 int status = 0;
536ff0f8 5698 unsigned char fl_flags = request->fl_flags;
faf5f49c 5699
8d0a8a9d 5700 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5701 /* Unlock _before_ we do the RPC call */
5702 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5703 /* Exclude nfs_delegation_claim_locks() */
5704 mutex_lock(&sp->so_delegreturn_mutex);
5705 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 5706 down_read(&nfsi->rwsem);
83bfff23 5707 if (do_vfs_lock(inode, request) == -ENOENT) {
19e03c57 5708 up_read(&nfsi->rwsem);
65b62a29 5709 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5710 goto out;
19e03c57
TM		 5711 }
5712 up_read(&nfsi->rwsem);
65b62a29 5713 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5714 if (status != 0)
9b073574
TM		 5715 goto out;
5716 /* Is this a delegated lock? */
8d0a8a9d 5717 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5718 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5719 goto out;
b4019c0e
TM		 5720 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5721 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5722 status = -ENOMEM;
badc76dd 5723 if (IS_ERR(seqid))
9b073574 5724 goto out;
cd3758e3 5725 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5726 status = PTR_ERR(task);
5727 if (IS_ERR(task))
9b073574 5728 goto out;
a5d16a4d 5729 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5730 rpc_put_task(task);
9b073574 5731out:
536ff0f8 5732 request->fl_flags = fl_flags;
d1b748a5 5733 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5734 return status;
5735}
5736
a5d16a4d
TM		 5737struct nfs4_lockdata {
5738 struct nfs_lock_args arg;
5739 struct nfs_lock_res res;
5740 struct nfs4_lock_state *lsp;
5741 struct nfs_open_context *ctx;
5742 struct file_lock fl;
26e976a8 5743 unsigned long timestamp;
a5d16a4d
TM		 5744 int rpc_status;
5745 int cancelled;
66179efe 5746 struct nfs_server *server;
a5d16a4d
TM		 5747};
5748
5749static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5750 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5751 gfp_t gfp_mask)
1da177e4 5752{
a5d16a4d
TM		 5753 struct nfs4_lockdata *p;
5754 struct inode *inode = lsp->ls_state->inode;
1da177e4 5755 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 5756 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 5757
8535b2be 5758 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5759 if (p == NULL)
5760 return NULL;
5761
5762 p->arg.fh = NFS_FH(inode);
5763 p->arg.fl = &p->fl;
8535b2be 5764 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 5765 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 5766 goto out_free;
b4019c0e
TM		 5767 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5768 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 5769 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 5770 goto out_free_seqid;
7539bbab 5771 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5772 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5773 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5774 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5775 p->lsp = lsp;
66179efe 5776 p->server = server;
a5d16a4d
TM		 5777 atomic_inc(&lsp->ls_count);
5778 p->ctx = get_nfs_open_context(ctx);
feaff8e5 5779 get_file(fl->fl_file);
a5d16a4d
TM		 5780 memcpy(&p->fl, fl, sizeof(p->fl));
5781 return p;
2f74c0a0
TM		 5782out_free_seqid:
5783 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5784out_free:
5785 kfree(p);
5786 return NULL;
5787}
5788
5789static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5790{
5791 struct nfs4_lockdata *data = calldata;
5792 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5793
3110ff80 5794 dprintk("%s: begin!\n", __func__);
2f74c0a0 5795 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5796 goto out_wait;
a5d16a4d 5797 /* Do we need to do an open_to_lock_owner? */
6b447539 5798 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 5799 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5800 goto out_release_lock_seqid;
8fe72bac 5801 }
425c1d4e
TM		 5802 nfs4_stateid_copy(&data->arg.open_stateid,
5803 &state->open_stateid);
a5d16a4d 5804 data->arg.new_lock_owner = 1;
c1d51931 5805 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 5806 } else {
2f74c0a0 5807 data->arg.new_lock_owner = 0;
425c1d4e
TM		 5808 nfs4_stateid_copy(&data->arg.lock_stateid,
5809 &data->lsp->ls_stateid);
5810 }
5d422301
TM		 5811 if (!nfs4_valid_open_stateid(state)) {
5812 data->rpc_status = -EBADF;
5813 task->tk_action = NULL;
5814 goto out_release_open_seqid;
5815 }
26e976a8 5816 data->timestamp = jiffies;
035168ab
TM		 5817 if (nfs4_setup_sequence(data->server,
5818 &data->arg.seq_args,
2240a9e2 5819 &data->res.seq_res,
d9afbd1b 5820 task) == 0)
66179efe 5821 return;
5d422301 5822out_release_open_seqid:
2240a9e2
TM		 5823 nfs_release_seqid(data->arg.open_seqid);
5824out_release_lock_seqid:
5825 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5826out_wait:
5827 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5828 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5829}
5830
a5d16a4d
TM		 5831static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5832{
5833 struct nfs4_lockdata *data = calldata;
39071e6f 5834 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 5835
3110ff80 5836 dprintk("%s: begin!\n", __func__);
a5d16a4d 5837
14516c3a
TM		 5838 if (!nfs4_sequence_done(task, &data->res.seq_res))
5839 return;
66179efe 5840
a5d16a4d 5841 data->rpc_status = task->tk_status;
425c1d4e
TM		 5842 switch (task->tk_status) {
5843 case 0:
2b0143b5 5844 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 5845 data->timestamp);
c69899a1
TM		 5846 if (data->arg.new_lock) {
5847 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
83bfff23 5848 if (do_vfs_lock(lsp->ls_state->inode, &data->fl) < 0) {
c69899a1
TM		 5849 rpc_restart_call_prepare(task);
5850 break;
5851 }
5852 }
39071e6f
TM		 5853 if (data->arg.new_lock_owner != 0) {
5854 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5855 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5856 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5857 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5858 rpc_restart_call_prepare(task);
425c1d4e
TM		 5859 break;
5860 case -NFS4ERR_BAD_STATEID:
5861 case -NFS4ERR_OLD_STATEID:
5862 case -NFS4ERR_STALE_STATEID:
5863 case -NFS4ERR_EXPIRED:
5864 if (data->arg.new_lock_owner != 0) {
5865 if (!nfs4_stateid_match(&data->arg.open_stateid,
5866 &lsp->ls_state->open_stateid))
5867 rpc_restart_call_prepare(task);
5868 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5869 &lsp->ls_stateid))
5870 rpc_restart_call_prepare(task);
a5d16a4d 5871 }
3110ff80 5872 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5873}
5874
5875static void nfs4_lock_release(void *calldata)
5876{
5877 struct nfs4_lockdata *data = calldata;
5878
3110ff80 5879 dprintk("%s: begin!\n", __func__);
2f74c0a0 5880 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5881 if (data->cancelled != 0) {
5882 struct rpc_task *task;
5883 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5884 data->arg.lock_seqid);
5885 if (!IS_ERR(task))
bf294b41 5886 rpc_put_task_async(task);
3110ff80 5887 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5888 } else
5889 nfs_free_seqid(data->arg.lock_seqid);
5890 nfs4_put_lock_state(data->lsp);
5891 put_nfs_open_context(data->ctx);
feaff8e5 5892 fput(data->fl.fl_file);
a5d16a4d 5893 kfree(data);
3110ff80 5894 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5895}
5896
5897static const struct rpc_call_ops nfs4_lock_ops = {
5898 .rpc_call_prepare = nfs4_lock_prepare,
5899 .rpc_call_done = nfs4_lock_done,
5900 .rpc_release = nfs4_lock_release,
5901};
5902
2bee72a6
TM		 5903static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5904{
2bee72a6
TM		 5905 switch (error) {
5906 case -NFS4ERR_ADMIN_REVOKED:
5907 case -NFS4ERR_BAD_STATEID:
ecac799a 5908 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5909 if (new_lock_owner != 0 ||
795a88c9 5910 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5911 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5912 break;
5913 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5914 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5915 case -NFS4ERR_EXPIRED:
5916 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5917 };
5918}
5919
afe6c27c 5920static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5921{
5922 struct nfs4_lockdata *data;
5923 struct rpc_task *task;
5138fde0
TM		 5924 struct rpc_message msg = {
5925 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5926 .rpc_cred = state->owner->so_cred,
5927 };
c970aa85
TM		 5928 struct rpc_task_setup task_setup_data = {
5929 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5930 .rpc_message = &msg,
c970aa85 5931 .callback_ops = &nfs4_lock_ops,
101070ca 5932 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5933 .flags = RPC_TASK_ASYNC,
5934 };
a5d16a4d
TM		 5935 int ret;
5936
3110ff80 5937 dprintk("%s: begin!\n", __func__);
cd3758e3 5938 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5939 fl->fl_u.nfs4_fl.owner,
5940 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5941 if (data == NULL)
5942 return -ENOMEM;
5943 if (IS_SETLKW(cmd))
5944 data->arg.block = 1;
a9c92d6b 5945 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5946 msg.rpc_argp = &data->arg;
5947 msg.rpc_resp = &data->res;
c970aa85 5948 task_setup_data.callback_data = data;
8fe72bac
TM		 5949 if (recovery_type > NFS_LOCK_NEW) {
5950 if (recovery_type == NFS_LOCK_RECLAIM)
5951 data->arg.reclaim = NFS_LOCK_RECLAIM;
5952 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 5953 } else
5954 data->arg.new_lock = 1;
c970aa85 5955 task = rpc_run_task(&task_setup_data);
7a1218a2 5956 if (IS_ERR(task))
a5d16a4d 5957 return PTR_ERR(task);
a5d16a4d
TM		 5958 ret = nfs4_wait_for_completion_rpc_task(task);
5959 if (ret == 0) {
5960 ret = data->rpc_status;
2bee72a6
TM		 5961 if (ret)
5962 nfs4_handle_setlk_error(data->server, data->lsp,
5963 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5964 } else
5965 data->cancelled = 1;
e6b3c4db 5966 rpc_put_task(task);
3110ff80 5967 dprintk("%s: done, ret = %d!\n", __func__, ret);
48c9579a 5968 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
a5d16a4d 5969 return ret;
1da177e4
LT		 5970}
5971
5972static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5973{
202b50dc 5974 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5975 struct nfs4_exception exception = {
5976 .inode = state->inode,
5977 };
202b50dc
TM		 5978 int err;
5979
5980 do {
42a2d13e
TM		 5981 /* Cache the lock if possible... */
5982 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5983 return 0;
afe6c27c 5984 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 5985 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5986 break;
5987 nfs4_handle_exception(server, err, &exception);
5988 } while (exception.retry);
5989 return err;
1da177e4
LT		 5990}
5991
5992static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5993{
202b50dc 5994 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5995 struct nfs4_exception exception = {
5996 .inode = state->inode,
5997 };
202b50dc
TM		 5998 int err;
5999
6bfc93ef
TM		 6000 err = nfs4_set_lock_state(state, request);
6001 if (err != 0)
6002 return err;
f6de7a39 6003 if (!recover_lost_locks) {
ef1820f9
N		 6004 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
6005 return 0;
6006 }
202b50dc 6007 do {
42a2d13e
TM		 6008 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
6009 return 0;
afe6c27c 6010 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 6011 switch (err) {
6012 default:
6013 goto out;
6014 case -NFS4ERR_GRACE:
6015 case -NFS4ERR_DELAY:
6016 nfs4_handle_exception(server, err, &exception);
6017 err = 0;
6018 }
202b50dc 6019 } while (exception.retry);
a9ed2e25 6020out:
202b50dc 6021 return err;
1da177e4
LT		 6022}
6023
f062eb6c 6024#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 6025/**
6026 * nfs41_check_expired_locks - possibly free a lock stateid
6027 *
6028 * @state: NFSv4 state for an inode
6029 *
6030 * Returns NFS_OK if recovery for this stateid is now finished.
6031 * Otherwise a negative NFS4ERR value is returned.
6032 */
b01dd1d8 6033static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 6034{
eb64cf96 6035 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 6036 struct nfs4_lock_state *lsp;
f062eb6c
BS		 6037 struct nfs_server *server = NFS_SERVER(state->inode);
6038
b01dd1d8 6039 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 6040 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 6041 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
6042
6043 status = nfs41_test_stateid(server,
6044 &lsp->ls_stateid,
6045 cred);
08cb47fa 6046 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 6047 if (status != NFS_OK) {
3e60ffdd
CL		 6048 /* Free the stateid unless the server
6049 * informs us the stateid is unrecognized. */
89af2739
CL		 6050 if (status != -NFS4ERR_BAD_STATEID)
6051 nfs41_free_stateid(server,
ab7cb0df
TM		 6052 &lsp->ls_stateid,
6053 cred);
795a88c9 6054 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 6055 ret = status;
6056 }
6057 }
6058 };
6059
6060 return ret;
6061}
6062
6063static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6064{
6065 int status = NFS_OK;
6066
6067 if (test_bit(LK_STATE_IN_USE, &state->flags))
6068 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 6069 if (status != NFS_OK)
6070 status = nfs4_lock_expired(state, request);
6071 return status;
f062eb6c
BS		 6072}
6073#endif
6074
1da177e4
LT		 6075static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6076{
19e03c57 6077 struct nfs_inode *nfsi = NFS_I(state->inode);
11476e9d 6078 struct nfs4_state_owner *sp = state->owner;
01c3b861 6079 unsigned char fl_flags = request->fl_flags;
8e469ebd 6080 int status = -ENOLCK;
1da177e4 6081
8e469ebd
TM		 6082 if ((fl_flags & FL_POSIX) &&
6083 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6084 goto out;
6bfc93ef 6085 /* Is this a delegated open? */
6bfc93ef
TM		 6086 status = nfs4_set_lock_state(state, request);
6087 if (status != 0)
6088 goto out;
01c3b861 6089 request->fl_flags |= FL_ACCESS;
83bfff23 6090 status = do_vfs_lock(state->inode, request);
01c3b861
TM		 6091 if (status < 0)
6092 goto out;
11476e9d 6093 mutex_lock(&sp->so_delegreturn_mutex);
19e03c57 6094 down_read(&nfsi->rwsem);
01c3b861 6095 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6096 /* Yes: cache locks! */
01c3b861 6097 /* ...but avoid races with delegation recall... */
19e03c57 6098 request->fl_flags = fl_flags & ~FL_SLEEP;
83bfff23 6099 status = do_vfs_lock(state->inode, request);
c69899a1 6100 up_read(&nfsi->rwsem);
11476e9d 6101 mutex_unlock(&sp->so_delegreturn_mutex);
9a99af49 6102 goto out;
9a99af49 6103 }
19e03c57 6104 up_read(&nfsi->rwsem);
11476e9d 6105 mutex_unlock(&sp->so_delegreturn_mutex);
c69899a1 6106 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6107out:
6108 request->fl_flags = fl_flags;
1da177e4
LT		 6109 return status;
6110}
6111
6112static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6113{
a1d0b5ee
TM		 6114 struct nfs4_exception exception = {
6115 .state = state,
05ffe24f 6116 .inode = state->inode,
a1d0b5ee 6117 };
1da177e4
LT		 6118 int err;
6119
6120 do {
965b5d67
TM		 6121 err = _nfs4_proc_setlk(state, cmd, request);
6122 if (err == -NFS4ERR_DENIED)
6123 err = -EAGAIN;
1da177e4 6124 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6125 err, &exception);
1da177e4
LT		 6126 } while (exception.retry);
6127 return err;
6128}
6129
6130static int
6131nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6132{
6133 struct nfs_open_context *ctx;
6134 struct nfs4_state *state;
6135 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6136 int status;
6137
6138 /* verify open state */
cd3758e3 6139 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6140 state = ctx->state;
6141
6142 if (request->fl_start < 0 || request->fl_end < 0)
6143 return -EINVAL;
6144
d953126a
TM		 6145 if (IS_GETLK(cmd)) {
6146 if (state != NULL)
6147 return nfs4_proc_getlk(state, F_GETLK, request);
6148 return 0;
6149 }
1da177e4
LT		 6150
6151 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6152 return -EINVAL;
6153
d953126a
TM		 6154 if (request->fl_type == F_UNLCK) {
6155 if (state != NULL)
6156 return nfs4_proc_unlck(state, cmd, request);
6157 return 0;
6158 }
1da177e4 6159
d953126a
TM		 6160 if (state == NULL)
6161 return -ENOLCK;
55725513
TM		 6162 /*
6163 * Don't rely on the VFS having checked the file open mode,
6164 * since it won't do this for flock() locks.
6165 */
f44106e2 6166 switch (request->fl_type) {
55725513
TM		 6167 case F_RDLCK:
6168 if (!(filp->f_mode & FMODE_READ))
6169 return -EBADF;
6170 break;
6171 case F_WRLCK:
6172 if (!(filp->f_mode & FMODE_WRITE))
6173 return -EBADF;
6174 }
6175
1da177e4
LT		 6176 do {
6177 status = nfs4_proc_setlk(state, cmd, request);
6178 if ((status != -EAGAIN) || IS_SETLK(cmd))
6179 break;
6180 timeout = nfs4_set_lock_task_retry(timeout);
6181 status = -ERESTARTSYS;
6182 if (signalled())
6183 break;
6184 } while(status < 0);
1da177e4
LT		 6185 return status;
6186}
6187
db4f2e63 6188int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6189{
6190 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6191 int err;
6192
6193 err = nfs4_set_lock_state(state, fl);
6194 if (err != 0)
db4f2e63 6195 return err;
4a706fa0 6196 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6197 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6198}
6b3b5496 6199
cf470c3e
TM		 6200struct nfs_release_lockowner_data {
6201 struct nfs4_lock_state *lsp;
5ae67c4f 6202 struct nfs_server *server;
cf470c3e 6203 struct nfs_release_lockowner_args args;
b7e63a10 6204 struct nfs_release_lockowner_res res;
60ea6812 6205 unsigned long timestamp;
cf470c3e
TM		 6206};
6207
fbd4bfd1
CL		 6208static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6209{
6210 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6211 struct nfs_server *server = data->server;
cb04ad2a
PT		 6212 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6213 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6214 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6215 data->timestamp = jiffies;
fbd4bfd1
CL		 6216}
6217
6218static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6219{
6220 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6221 struct nfs_server *server = data->server;
6222
b7e63a10 6223 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6224
6225 switch (task->tk_status) {
6226 case 0:
6227 renew_lease(server, data->timestamp);
6228 break;
6229 case -NFS4ERR_STALE_CLIENTID:
6230 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6231 nfs4_schedule_lease_recovery(server->nfs_client);
6232 break;
60ea6812
CL		 6233 case -NFS4ERR_LEASE_MOVED:
6234 case -NFS4ERR_DELAY:
8478eaa1
N		 6235 if (nfs4_async_handle_error(task, server,
6236 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6237 rpc_restart_call_prepare(task);
6238 }
fbd4bfd1
CL		 6239}
6240
d3c7b7cc
TM		 6241static void nfs4_release_lockowner_release(void *calldata)
6242{
cf470c3e 6243 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6244 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6245 kfree(calldata);
6246}
6247
17280175 6248static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6249 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6250 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6251 .rpc_release = nfs4_release_lockowner_release,
6252};
6253
f1cdae87
JL		 6254static void
6255nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6256{
cf470c3e 6257 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6258 struct rpc_message msg = {
6259 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6260 };
6261
6262 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6263 return;
fbd4bfd1 6264
cf470c3e
TM		 6265 data = kmalloc(sizeof(*data), GFP_NOFS);
6266 if (!data)
f1cdae87 6267 return;
cf470c3e 6268 data->lsp = lsp;
5ae67c4f 6269 data->server = server;
cf470c3e
TM		 6270 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6271 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6272 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6273
cf470c3e 6274 msg.rpc_argp = &data->args;
b7e63a10
TM		 6275 msg.rpc_resp = &data->res;
6276 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6277 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6278}
6279
aa1870af
BF		 6280#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6281
d9a82a04 6282static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
59301226
AV		 6283 struct dentry *unused, struct inode *inode,
6284 const char *key, const void *buf,
6285 size_t buflen, int flags)
6b3b5496 6286{
59301226 6287 return nfs4_proc_set_acl(inode, buf, buflen);
6b3b5496
BF		 6288}
6289
d9a82a04 6290static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
b296821a
AV		 6291 struct dentry *unused, struct inode *inode,
6292 const char *key, void *buf, size_t buflen)
6b3b5496 6293{
b296821a 6294 return nfs4_proc_get_acl(inode, buf, buflen);
6b3b5496
BF		 6295}
6296
764a5c6b 6297static bool nfs4_xattr_list_nfs4_acl(struct dentry *dentry)
6b3b5496 6298{
764a5c6b 6299 return nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry)));
6b3b5496
BF		 6300}
6301
c9bccef6 6302#ifdef CONFIG_NFS_V4_SECURITY_LABEL
c9bccef6 6303
d9a82a04 6304static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
59301226
AV		 6305 struct dentry *unused, struct inode *inode,
6306 const char *key, const void *buf,
6307 size_t buflen, int flags)
c9bccef6
DQ		 6308{
6309 if (security_ismaclabel(key))
59301226 6310 return nfs4_set_security_label(inode, buf, buflen);
c9bccef6
DQ		 6311
6312 return -EOPNOTSUPP;
6313}
6314
d9a82a04 6315static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
b296821a
AV		 6316 struct dentry *unused, struct inode *inode,
6317 const char *key, void *buf, size_t buflen)
c9bccef6
DQ		 6318{
6319 if (security_ismaclabel(key))
b296821a 6320 return nfs4_get_security_label(inode, buf, buflen);
c9bccef6
DQ		 6321 return -EOPNOTSUPP;
6322}
6323
c4803c49
AG		 6324static ssize_t
6325nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
c9bccef6 6326{
c4803c49 6327 int len = 0;
c9bccef6 6328
c4803c49
AG		 6329 if (nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL)) {
6330 len = security_inode_listsecurity(inode, list, list_len);
6331 if (list_len && len > list_len)
6332 return -ERANGE;
c9bccef6
DQ		 6333 }
6334 return len;
6335}
6336
6337static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6338 .prefix = XATTR_SECURITY_PREFIX,
c9bccef6
DQ		 6339 .get = nfs4_xattr_get_nfs4_label,
6340 .set = nfs4_xattr_set_nfs4_label,
6341};
c9bccef6 6342
c4803c49
AG		 6343#else
6344
6345static ssize_t
6346nfs4_listxattr_nfs4_label(struct inode *inode, char *list, size_t list_len)
6347{
6348 return 0;
6349}
6350
6351#endif
c9bccef6 6352
533eb461
AA		 6353/*
6354 * nfs_fhget will use either the mounted_on_fileid or the fileid
6355 */
69aaaae1
TM		 6356static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6357{
533eb461
AA		 6358 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6359 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6360 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6361 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6362 return;
6363
6364 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6365 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6366 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6367 fattr->nlink = 2;
6368}
6369
f05d147f
BS		 6370static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6371 const struct qstr *name,
6372 struct nfs4_fs_locations *fs_locations,
6373 struct page *page)
683b57b4
TM		 6374{
6375 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6376 u32 bitmask[3] = {
361e624f 6377 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6378 };
6379 struct nfs4_fs_locations_arg args = {
6380 .dir_fh = NFS_FH(dir),
c228fd3a 6381 .name = name,
683b57b4
TM		 6382 .page = page,
6383 .bitmask = bitmask,
6384 };
22958463
BH		 6385 struct nfs4_fs_locations_res res = {
6386 .fs_locations = fs_locations,
6387 };
683b57b4
TM		 6388 struct rpc_message msg = {
6389 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6390 .rpc_argp = &args,
22958463 6391 .rpc_resp = &res,
683b57b4
TM		 6392 };
6393 int status;
6394
3110ff80 6395 dprintk("%s: start\n", __func__);
533eb461
AA		 6396
6397 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6398 * is not supported */
6399 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6400 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6401 else
6402 bitmask[0] |= FATTR4_WORD0_FILEID;
6403
c228fd3a 6404 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6405 fs_locations->server = server;
830b8e33 6406 fs_locations->nlocations = 0;
f05d147f 6407 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6408 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6409 return status;
6410}
6411
f05d147f
BS		 6412int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6413 const struct qstr *name,
6414 struct nfs4_fs_locations *fs_locations,
6415 struct page *page)
db0a9593
BS		 6416{
6417 struct nfs4_exception exception = { };
6418 int err;
6419 do {
078ea3df
TM		 6420 err = _nfs4_proc_fs_locations(client, dir, name,
6421 fs_locations, page);
6422 trace_nfs4_get_fs_locations(dir, name, err);
6423 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6424 &exception);
6425 } while (exception.retry);
6426 return err;
6427}
6428
b03d735b
CL		 6429/*
6430 * This operation also signals the server that this client is
6431 * performing migration recovery. The server can stop returning
6432 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6433 * appended to this compound to identify the client ID which is
6434 * performing recovery.
6435 */
6436static int _nfs40_proc_get_locations(struct inode *inode,
6437 struct nfs4_fs_locations *locations,
6438 struct page *page, struct rpc_cred *cred)
6439{
6440 struct nfs_server *server = NFS_SERVER(inode);
6441 struct rpc_clnt *clnt = server->client;
6442 u32 bitmask[2] = {
6443 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6444 };
6445 struct nfs4_fs_locations_arg args = {
6446 .clientid = server->nfs_client->cl_clientid,
6447 .fh = NFS_FH(inode),
6448 .page = page,
6449 .bitmask = bitmask,
6450 .migration = 1, /* skip LOOKUP */
6451 .renew = 1, /* append RENEW */
6452 };
6453 struct nfs4_fs_locations_res res = {
6454 .fs_locations = locations,
6455 .migration = 1,
6456 .renew = 1,
6457 };
6458 struct rpc_message msg = {
6459 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6460 .rpc_argp = &args,
6461 .rpc_resp = &res,
6462 .rpc_cred = cred,
6463 };
6464 unsigned long now = jiffies;
6465 int status;
6466
6467 nfs_fattr_init(&locations->fattr);
6468 locations->server = server;
6469 locations->nlocations = 0;
6470
6471 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6472 nfs4_set_sequence_privileged(&args.seq_args);
6473 status = nfs4_call_sync_sequence(clnt, server, &msg,
6474 &args.seq_args, &res.seq_res);
6475 if (status)
6476 return status;
6477
6478 renew_lease(server, now);
6479 return 0;
6480}
6481
6482#ifdef CONFIG_NFS_V4_1
6483
6484/*
6485 * This operation also signals the server that this client is
6486 * performing migration recovery. The server can stop asserting
6487 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6488 * performing this operation is identified in the SEQUENCE
6489 * operation in this compound.
6490 *
6491 * When the client supports GETATTR(fs_locations_info), it can
6492 * be plumbed in here.
6493 */
6494static int _nfs41_proc_get_locations(struct inode *inode,
6495 struct nfs4_fs_locations *locations,
6496 struct page *page, struct rpc_cred *cred)
6497{
6498 struct nfs_server *server = NFS_SERVER(inode);
6499 struct rpc_clnt *clnt = server->client;
6500 u32 bitmask[2] = {
6501 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6502 };
6503 struct nfs4_fs_locations_arg args = {
6504 .fh = NFS_FH(inode),
6505 .page = page,
6506 .bitmask = bitmask,
6507 .migration = 1, /* skip LOOKUP */
6508 };
6509 struct nfs4_fs_locations_res res = {
6510 .fs_locations = locations,
6511 .migration = 1,
6512 };
6513 struct rpc_message msg = {
6514 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6515 .rpc_argp = &args,
6516 .rpc_resp = &res,
6517 .rpc_cred = cred,
6518 };
6519 int status;
6520
6521 nfs_fattr_init(&locations->fattr);
6522 locations->server = server;
6523 locations->nlocations = 0;
6524
6525 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6526 nfs4_set_sequence_privileged(&args.seq_args);
6527 status = nfs4_call_sync_sequence(clnt, server, &msg,
6528 &args.seq_args, &res.seq_res);
6529 if (status == NFS4_OK &&
6530 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6531 status = -NFS4ERR_LEASE_MOVED;
6532 return status;
6533}
6534
6535#endif /* CONFIG_NFS_V4_1 */
6536
6537/**
6538 * nfs4_proc_get_locations - discover locations for a migrated FSID
6539 * @inode: inode on FSID that is migrating
6540 * @locations: result of query
6541 * @page: buffer
6542 * @cred: credential to use for this operation
6543 *
6544 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6545 * operation failed, or a negative errno if a local error occurred.
6546 *
6547 * On success, "locations" is filled in, but if the server has
6548 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6549 * asserted.
6550 *
6551 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6552 * from this client that require migration recovery.
6553 */
6554int nfs4_proc_get_locations(struct inode *inode,
6555 struct nfs4_fs_locations *locations,
6556 struct page *page, struct rpc_cred *cred)
6557{
6558 struct nfs_server *server = NFS_SERVER(inode);
6559 struct nfs_client *clp = server->nfs_client;
6560 const struct nfs4_mig_recovery_ops *ops =
6561 clp->cl_mvops->mig_recovery_ops;
6562 struct nfs4_exception exception = { };
6563 int status;
6564
6565 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6566 (unsigned long long)server->fsid.major,
6567 (unsigned long long)server->fsid.minor,
6568 clp->cl_hostname);
6569 nfs_display_fhandle(NFS_FH(inode), __func__);
6570
6571 do {
6572 status = ops->get_locations(inode, locations, page, cred);
6573 if (status != -NFS4ERR_DELAY)
6574 break;
6575 nfs4_handle_exception(server, status, &exception);
6576 } while (exception.retry);
6577 return status;
6578}
6579
44c99933
CL		 6580/*
6581 * This operation also signals the server that this client is
6582 * performing "lease moved" recovery. The server can stop
6583 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6584 * is appended to this compound to identify the client ID which is
6585 * performing recovery.
6586 */
6587static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6588{
6589 struct nfs_server *server = NFS_SERVER(inode);
6590 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6591 struct rpc_clnt *clnt = server->client;
6592 struct nfs4_fsid_present_arg args = {
6593 .fh = NFS_FH(inode),
6594 .clientid = clp->cl_clientid,
6595 .renew = 1, /* append RENEW */
6596 };
6597 struct nfs4_fsid_present_res res = {
6598 .renew = 1,
6599 };
6600 struct rpc_message msg = {
6601 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6602 .rpc_argp = &args,
6603 .rpc_resp = &res,
6604 .rpc_cred = cred,
6605 };
6606 unsigned long now = jiffies;
6607 int status;
6608
6609 res.fh = nfs_alloc_fhandle();
6610 if (res.fh == NULL)
6611 return -ENOMEM;
6612
6613 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6614 nfs4_set_sequence_privileged(&args.seq_args);
6615 status = nfs4_call_sync_sequence(clnt, server, &msg,
6616 &args.seq_args, &res.seq_res);
6617 nfs_free_fhandle(res.fh);
6618 if (status)
6619 return status;
6620
6621 do_renew_lease(clp, now);
6622 return 0;
6623}
6624
6625#ifdef CONFIG_NFS_V4_1
6626
6627/*
6628 * This operation also signals the server that this client is
6629 * performing "lease moved" recovery. The server can stop asserting
6630 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6631 * this operation is identified in the SEQUENCE operation in this
6632 * compound.
6633 */
6634static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6635{
6636 struct nfs_server *server = NFS_SERVER(inode);
6637 struct rpc_clnt *clnt = server->client;
6638 struct nfs4_fsid_present_arg args = {
6639 .fh = NFS_FH(inode),
6640 };
6641 struct nfs4_fsid_present_res res = {
6642 };
6643 struct rpc_message msg = {
6644 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6645 .rpc_argp = &args,
6646 .rpc_resp = &res,
6647 .rpc_cred = cred,
6648 };
6649 int status;
6650
6651 res.fh = nfs_alloc_fhandle();
6652 if (res.fh == NULL)
6653 return -ENOMEM;
6654
6655 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6656 nfs4_set_sequence_privileged(&args.seq_args);
6657 status = nfs4_call_sync_sequence(clnt, server, &msg,
6658 &args.seq_args, &res.seq_res);
6659 nfs_free_fhandle(res.fh);
6660 if (status == NFS4_OK &&
6661 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6662 status = -NFS4ERR_LEASE_MOVED;
6663 return status;
6664}
6665
6666#endif /* CONFIG_NFS_V4_1 */
6667
6668/**
6669 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6670 * @inode: inode on FSID to check
6671 * @cred: credential to use for this operation
6672 *
6673 * Server indicates whether the FSID is present, moved, or not
6674 * recognized. This operation is necessary to clear a LEASE_MOVED
6675 * condition for this client ID.
6676 *
6677 * Returns NFS4_OK if the FSID is present on this server,
6678 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6679 * NFS4ERR code if some error occurred on the server, or a
6680 * negative errno if a local failure occurred.
6681 */
6682int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6683{
6684 struct nfs_server *server = NFS_SERVER(inode);
6685 struct nfs_client *clp = server->nfs_client;
6686 const struct nfs4_mig_recovery_ops *ops =
6687 clp->cl_mvops->mig_recovery_ops;
6688 struct nfs4_exception exception = { };
6689 int status;
6690
6691 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6692 (unsigned long long)server->fsid.major,
6693 (unsigned long long)server->fsid.minor,
6694 clp->cl_hostname);
6695 nfs_display_fhandle(NFS_FH(inode), __func__);
6696
6697 do {
6698 status = ops->fsid_present(inode, cred);
6699 if (status != -NFS4ERR_DELAY)
6700 break;
6701 nfs4_handle_exception(server, status, &exception);
6702 } while (exception.retry);
6703 return status;
6704}
6705
5ec16a85 6706/**
a5250def
WAA		 6707 * If 'use_integrity' is true and the state managment nfs_client
6708 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6709 * and the machine credential as per RFC3530bis and RFC5661 Security
6710 * Considerations sections. Otherwise, just use the user cred with the
6711 * filesystem's rpc_client.
5ec16a85 6712 */
a5250def 6713static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6714{
6715 int status;
6716 struct nfs4_secinfo_arg args = {
6717 .dir_fh = NFS_FH(dir),
6718 .name = name,
6719 };
6720 struct nfs4_secinfo_res res = {
6721 .flavors = flavors,
6722 };
6723 struct rpc_message msg = {
6724 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6725 .rpc_argp = &args,
6726 .rpc_resp = &res,
6727 };
a5250def 6728 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6729 struct rpc_cred *cred = NULL;
a5250def
WAA		 6730
6731 if (use_integrity) {
6732 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6733 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6734 msg.rpc_cred = cred;
a5250def 6735 }
5a5ea0d4
BS		 6736
6737 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6738
6739 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6740 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6741
a5250def
WAA		 6742 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6743 &res.seq_res, 0);
5a5ea0d4 6744 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6745
7cb852df
WAA		 6746 if (cred)
6747 put_rpccred(cred);
a5250def 6748
5a5ea0d4
BS		 6749 return status;
6750}
6751
72de53ec
BS		 6752int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6753 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6754{
6755 struct nfs4_exception exception = { };
6756 int err;
6757 do {
a5250def
WAA		 6758 err = -NFS4ERR_WRONGSEC;
6759
6760 /* try to use integrity protection with machine cred */
6761 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6762 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6763
6764 /*
6765 * if unable to use integrity protection, or SECINFO with
6766 * integrity protection returns NFS4ERR_WRONGSEC (which is
6767 * disallowed by spec, but exists in deployed servers) use
6768 * the current filesystem's rpc_client and the user cred.
6769 */
6770 if (err == -NFS4ERR_WRONGSEC)
6771 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6772
078ea3df
TM		 6773 trace_nfs4_secinfo(dir, name, err);
6774 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6775 &exception);
6776 } while (exception.retry);
6777 return err;
6778}
6779
557134a3 6780#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6781/*
6782 * Check the exchange flags returned by the server for invalid flags, having
6783 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6784 * DS flags set.
6785 */
6786static int nfs4_check_cl_exchange_flags(u32 flags)
6787{
6788 if (flags & ~EXCHGID4_FLAG_MASK_R)
6789 goto out_inval;
6790 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6791 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6792 goto out_inval;
6793 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6794 goto out_inval;
6795 return NFS_OK;
6796out_inval:
6797 return -NFS4ERR_INVAL;
6798}
6799
78fe0f41 6800static bool
79d4e1f0
CL		 6801nfs41_same_server_scope(struct nfs41_server_scope *a,
6802 struct nfs41_server_scope *b)
78fe0f41
WAA		 6803{
6804 if (a->server_scope_sz == b->server_scope_sz &&
6805 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6806 return true;
6807
6808 return false;
6809}
6810
02a95dee
AA		 6811static void
6812nfs4_bind_one_conn_to_session_done(struct rpc_task *task, void *calldata)
6813{
6814}
6815
6816static const struct rpc_call_ops nfs4_bind_one_conn_to_session_ops = {
6817 .rpc_call_done = &nfs4_bind_one_conn_to_session_done,
6818};
6819
7c44f1ae 6820/*
d9ddbf5d 6821 * nfs4_proc_bind_one_conn_to_session()
7c44f1ae
WAA		 6822 *
6823 * The 4.1 client currently uses the same TCP connection for the
6824 * fore and backchannel.
6825 */
d9ddbf5d
TM		 6826static
6827int nfs4_proc_bind_one_conn_to_session(struct rpc_clnt *clnt,
6828 struct rpc_xprt *xprt,
6829 struct nfs_client *clp,
6830 struct rpc_cred *cred)
7c44f1ae
WAA		 6831{
6832 int status;
71a097c6
TM		 6833 struct nfs41_bind_conn_to_session_args args = {
6834 .client = clp,
6835 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6836 };
7c44f1ae
WAA		 6837 struct nfs41_bind_conn_to_session_res res;
6838 struct rpc_message msg = {
6839 .rpc_proc =
6840 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 6841 .rpc_argp = &args,
7c44f1ae 6842 .rpc_resp = &res,
2cf047c9 6843 .rpc_cred = cred,
7c44f1ae 6844 };
d9ddbf5d
TM		 6845 struct rpc_task_setup task_setup_data = {
6846 .rpc_client = clnt,
6847 .rpc_xprt = xprt,
02a95dee 6848 .callback_ops = &nfs4_bind_one_conn_to_session_ops,
d9ddbf5d
TM		 6849 .rpc_message = &msg,
6850 .flags = RPC_TASK_TIMEOUT,
6851 };
6852 struct rpc_task *task;
7c44f1ae
WAA		 6853
6854 dprintk("--> %s\n", __func__);
7c44f1ae 6855
71a097c6
TM		 6856 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6857 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6858 args.dir = NFS4_CDFC4_FORE;
7c44f1ae 6859
d9ddbf5d
TM		 6860 /* Do not set the backchannel flag unless this is clnt->cl_xprt */
6861 if (xprt != rcu_access_pointer(clnt->cl_xprt))
6862 args.dir = NFS4_CDFC4_FORE;
6863
6864 task = rpc_run_task(&task_setup_data);
6865 if (!IS_ERR(task)) {
6866 status = task->tk_status;
6867 rpc_put_task(task);
6868 } else
6869 status = PTR_ERR(task);
c6d01c6f 6870 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 6871 if (status == 0) {
71a097c6 6872 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 6873 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6874 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6875 status = -EIO;
71a097c6 6876 goto out;
7c44f1ae 6877 }
71a097c6 6878 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 6879 dprintk("NFS: %s: Unexpected direction from server\n",
6880 __func__);
6881 status = -EIO;
71a097c6 6882 goto out;
7c44f1ae 6883 }
71a097c6 6884 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 6885 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6886 __func__);
6887 status = -EIO;
71a097c6 6888 goto out;
7c44f1ae
WAA		 6889 }
6890 }
7c44f1ae
WAA		 6891out:
6892 dprintk("<-- %s status= %d\n", __func__, status);
6893 return status;
6894}
6895
d9ddbf5d
TM		 6896struct rpc_bind_conn_calldata {
6897 struct nfs_client *clp;
6898 struct rpc_cred *cred;
6899};
6900
6901static int
6902nfs4_proc_bind_conn_to_session_callback(struct rpc_clnt *clnt,
6903 struct rpc_xprt *xprt,
6904 void *calldata)
6905{
6906 struct rpc_bind_conn_calldata *p = calldata;
6907
6908 return nfs4_proc_bind_one_conn_to_session(clnt, xprt, p->clp, p->cred);
6909}
6910
6911int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
6912{
6913 struct rpc_bind_conn_calldata data = {
6914 .clp = clp,
6915 .cred = cred,
6916 };
6917 return rpc_clnt_iterate_for_each_xprt(clp->cl_rpcclient,
6918 nfs4_proc_bind_conn_to_session_callback, &data);
6919}
6920
99fe60d0 6921/*
fa940720
WAA		 6922 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6923 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6924 */
6925static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6926 .how = SP4_MACH_CRED,
6927 .enforce.u.words = {
6928 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6929 1 << (OP_EXCHANGE_ID - 32) |
6930 1 << (OP_CREATE_SESSION - 32) |
6931 1 << (OP_DESTROY_SESSION - 32) |
6932 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6933 },
6934 .allow.u.words = {
6935 [0] = 1 << (OP_CLOSE) |
99ade3c7 6936 1 << (OP_OPEN_DOWNGRADE) |
a0279625 6937 1 << (OP_LOCKU) |
99ade3c7 6938 1 << (OP_DELEGRETURN) |
a0279625 6939 1 << (OP_COMMIT),
8b5bee2e 6940 [1] = 1 << (OP_SECINFO - 32) |
3787d506 6941 1 << (OP_SECINFO_NO_NAME - 32) |
99ade3c7 6942 1 << (OP_LAYOUTRETURN - 32) |
3787d506 6943 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6944 1 << (OP_FREE_STATEID - 32) |
6945 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6946 }
6947};
6948
6949/*
6950 * Select the state protection mode for client `clp' given the server results
6951 * from exchange_id in `sp'.
99fe60d0 6952 *
2031cd1a
WAA		 6953 * Returns 0 on success, negative errno otherwise.
6954 */
6955static int nfs4_sp4_select_mode(struct nfs_client *clp,
6956 struct nfs41_state_protection *sp)
6957{
6958 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6959 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6960 1 << (OP_EXCHANGE_ID - 32) |
6961 1 << (OP_CREATE_SESSION - 32) |
6962 1 << (OP_DESTROY_SESSION - 32) |
6963 1 << (OP_DESTROY_CLIENTID - 32)
6964 };
6965 unsigned int i;
6966
6967 if (sp->how == SP4_MACH_CRED) {
6968 /* Print state protect result */
6969 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6970 for (i = 0; i <= LAST_NFS4_OP; i++) {
6971 if (test_bit(i, sp->enforce.u.longs))
6972 dfprintk(MOUNT, " enforce op %d\n", i);
6973 if (test_bit(i, sp->allow.u.longs))
6974 dfprintk(MOUNT, " allow op %d\n", i);
6975 }
6976
6977 /* make sure nothing is on enforce list that isn't supported */
6978 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6979 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6980 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6981 return -EINVAL;
6982 }
6983 }
6984
6985 /*
6986 * Minimal mode - state operations are allowed to use machine
6987 * credential. Note this already happens by default, so the
6988 * client doesn't have to do anything more than the negotiation.
6989 *
6990 * NOTE: we don't care if EXCHANGE_ID is in the list -
6991 * we're already using the machine cred for exchange_id
6992 * and will never use a different cred.
6993 */
6994 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6995 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6996 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6997 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6998 dfprintk(MOUNT, "sp4_mach_cred:\n");
6999 dfprintk(MOUNT, " minimal mode enabled\n");
7000 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
7001 } else {
7002 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
7003 return -EINVAL;
7004 }
fa940720
WAA		 7005
7006 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
99ade3c7
AE		 7007 test_bit(OP_OPEN_DOWNGRADE, sp->allow.u.longs) &&
7008 test_bit(OP_DELEGRETURN, sp->allow.u.longs) &&
fa940720
WAA		 7009 test_bit(OP_LOCKU, sp->allow.u.longs)) {
7010 dfprintk(MOUNT, " cleanup mode enabled\n");
7011 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
7012 }
8b5bee2e 7013
99ade3c7
AE		 7014 if (test_bit(OP_LAYOUTRETURN, sp->allow.u.longs)) {
7015 dfprintk(MOUNT, " pnfs cleanup mode enabled\n");
7016 set_bit(NFS_SP4_MACH_CRED_PNFS_CLEANUP,
7017 &clp->cl_sp4_flags);
7018 }
7019
8b5bee2e
WAA		 7020 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
7021 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
7022 dfprintk(MOUNT, " secinfo mode enabled\n");
7023 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
7024 }
3787d506
WAA		 7025
7026 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
7027 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
7028 dfprintk(MOUNT, " stateid mode enabled\n");
7029 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
7030 }
8c21c62c
WAA		 7031
7032 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
7033 dfprintk(MOUNT, " write mode enabled\n");
7034 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
7035 }
7036
7037 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
7038 dfprintk(MOUNT, " commit mode enabled\n");
7039 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
7040 }
2031cd1a
WAA		 7041 }
7042
7043 return 0;
7044}
7045
7046/*
7047 * _nfs4_proc_exchange_id()
6bbb4ae8 7048 *
2031cd1a 7049 * Wrapper for EXCHANGE_ID operation.
99fe60d0 7050 */
2031cd1a
WAA		 7051static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
7052 u32 sp4_how)
99fe60d0
BH		 7053{
7054 nfs4_verifier verifier;
7055 struct nfs41_exchange_id_args args = {
cd93710e 7056 .verifier = &verifier,
99fe60d0 7057 .client = clp,
cd3fadec 7058#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 7059 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 7060 EXCHGID4_FLAG_BIND_PRINC_STATEID |
7061 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
7062#else
7063 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
7064 EXCHGID4_FLAG_BIND_PRINC_STATEID,
7065#endif
99fe60d0
BH		 7066 };
7067 struct nfs41_exchange_id_res res = {
32b01310 7068 0
99fe60d0
BH		 7069 };
7070 int status;
7071 struct rpc_message msg = {
7072 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
7073 .rpc_argp = &args,
7074 .rpc_resp = &res,
7075 .rpc_cred = cred,
7076 };
99fe60d0 7077
f092075d 7078 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 7079
7080 status = nfs4_init_uniform_client_string(clp);
7081 if (status)
3a6bb738 7082 goto out;
3a6bb738
JL		 7083
7084 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6bbb4ae8 7085 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 7086 clp->cl_owner_id);
99fe60d0 7087
acdeb69d 7088 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 7089 GFP_NOFS);
acdeb69d 7090 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 7091 status = -ENOMEM;
7092 goto out;
7093 }
78fe0f41 7094
79d4e1f0 7095 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 7096 GFP_NOFS);
177313f1 7097 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 7098 status = -ENOMEM;
acdeb69d 7099 goto out_server_owner;
abe9a6d5 7100 }
78fe0f41 7101
bbafffd2 7102 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 7103 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 7104 status = -ENOMEM;
7105 goto out_server_scope;
7106 }
7107
2031cd1a
WAA		 7108 switch (sp4_how) {
7109 case SP4_NONE:
7110 args.state_protect.how = SP4_NONE;
7111 break;
7112
7113 case SP4_MACH_CRED:
7114 args.state_protect = nfs4_sp4_mach_cred_request;
7115 break;
7116
7117 default:
7118 /* unsupported! */
7119 WARN_ON_ONCE(1);
7120 status = -EINVAL;
6b55970b 7121 goto out_impl_id;
2031cd1a
WAA		 7122 }
7123
1bd714f2 7124 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7125 trace_nfs4_exchange_id(clp, status);
177313f1 7126 if (status == 0)
32b01310 7127 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 7128
2031cd1a
WAA		 7129 if (status == 0)
7130 status = nfs4_sp4_select_mode(clp, &res.state_protect);
7131
acdeb69d 7132 if (status == 0) {
32b01310 7133 clp->cl_clientid = res.clientid;
e11259f9
TM		 7134 clp->cl_exchange_flags = res.flags;
7135 /* Client ID is not confirmed */
7136 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7137 clear_bit(NFS4_SESSION_ESTABLISHED,
7138 &clp->cl_session->session_state);
32b01310 7139 clp->cl_seqid = res.seqid;
e11259f9 7140 }
32b01310 7141
acdeb69d
CL		 7142 kfree(clp->cl_serverowner);
7143 clp->cl_serverowner = res.server_owner;
7144 res.server_owner = NULL;
78fe0f41 7145
7d2ed9ac 7146 /* use the most recent implementation id */
59155546
CL		 7147 kfree(clp->cl_implid);
7148 clp->cl_implid = res.impl_id;
6b55970b 7149 res.impl_id = NULL;
7d2ed9ac 7150
177313f1 7151 if (clp->cl_serverscope != NULL &&
79d4e1f0 7152 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 7153 res.server_scope)) {
7154 dprintk("%s: server_scope mismatch detected\n",
7155 __func__);
7156 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 7157 kfree(clp->cl_serverscope);
7158 clp->cl_serverscope = NULL;
78fe0f41
WAA		 7159 }
7160
177313f1 7161 if (clp->cl_serverscope == NULL) {
79d4e1f0 7162 clp->cl_serverscope = res.server_scope;
6b55970b 7163 res.server_scope = NULL;
abe9a6d5 7164 }
6b55970b 7165 }
7d2ed9ac 7166
6b55970b
KM		 7167out_impl_id:
7168 kfree(res.impl_id);
7d2ed9ac 7169out_server_scope:
abe9a6d5 7170 kfree(res.server_scope);
6b55970b
KM		 7171out_server_owner:
7172 kfree(res.server_owner);
abe9a6d5 7173out:
177313f1 7174 if (clp->cl_implid != NULL)
6bbb4ae8 7175 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 7176 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 7177 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 7178 clp->cl_implid->date.seconds,
7179 clp->cl_implid->date.nseconds);
6bbb4ae8 7180 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 7181 return status;
7182}
7183
2031cd1a
WAA		 7184/*
7185 * nfs4_proc_exchange_id()
7186 *
7187 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7188 *
7189 * Since the clientid has expired, all compounds using sessions
7190 * associated with the stale clientid will be returning
7191 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7192 * be in some phase of session reset.
7193 *
7194 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7195 */
7196int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7197{
7198 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7199 int status;
7200
7201 /* try SP4_MACH_CRED if krb5i/p */
7202 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7203 authflavor == RPC_AUTH_GSS_KRB5P) {
7204 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
7205 if (!status)
7206 return 0;
7207 }
7208
7209 /* try SP4_NONE */
7210 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
7211}
7212
66245539
TM		 7213static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7214 struct rpc_cred *cred)
7215{
7216 struct rpc_message msg = {
7217 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7218 .rpc_argp = clp,
7219 .rpc_cred = cred,
7220 };
7221 int status;
7222
7223 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7224 trace_nfs4_destroy_clientid(clp, status);
66245539 7225 if (status)
02c67525 7226 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7227 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7228 return status;
7229}
7230
7231static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7232 struct rpc_cred *cred)
7233{
7234 unsigned int loop;
7235 int ret;
7236
7237 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7238 ret = _nfs4_proc_destroy_clientid(clp, cred);
7239 switch (ret) {
7240 case -NFS4ERR_DELAY:
7241 case -NFS4ERR_CLIENTID_BUSY:
7242 ssleep(1);
7243 break;
7244 default:
7245 return ret;
7246 }
7247 }
7248 return 0;
7249}
7250
7251int nfs4_destroy_clientid(struct nfs_client *clp)
7252{
7253 struct rpc_cred *cred;
7254 int ret = 0;
7255
7256 if (clp->cl_mvops->minor_version < 1)
7257 goto out;
7258 if (clp->cl_exchange_flags == 0)
7259 goto out;
05f4c350
CL		 7260 if (clp->cl_preserve_clid)
7261 goto out;
73d8bde5 7262 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7263 ret = nfs4_proc_destroy_clientid(clp, cred);
7264 if (cred)
7265 put_rpccred(cred);
7266 switch (ret) {
7267 case 0:
7268 case -NFS4ERR_STALE_CLIENTID:
7269 clp->cl_exchange_flags = 0;
7270 }
7271out:
7272 return ret;
7273}
7274
2050f0cc
AA		 7275struct nfs4_get_lease_time_data {
7276 struct nfs4_get_lease_time_args *args;
7277 struct nfs4_get_lease_time_res *res;
7278 struct nfs_client *clp;
7279};
7280
7281static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7282 void *calldata)
7283{
2050f0cc
AA		 7284 struct nfs4_get_lease_time_data *data =
7285 (struct nfs4_get_lease_time_data *)calldata;
7286
7287 dprintk("--> %s\n", __func__);
7288 /* just setup sequence, do not trigger session recovery
7289 since we're invoked within one */
d9afbd1b
TM		 7290 nfs41_setup_sequence(data->clp->cl_session,
7291 &data->args->la_seq_args,
7292 &data->res->lr_seq_res,
7293 task);
2050f0cc
AA		 7294 dprintk("<-- %s\n", __func__);
7295}
7296
7297/*
7298 * Called from nfs4_state_manager thread for session setup, so don't recover
7299 * from sequence operation or clientid errors.
7300 */
7301static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7302{
7303 struct nfs4_get_lease_time_data *data =
7304 (struct nfs4_get_lease_time_data *)calldata;
7305
7306 dprintk("--> %s\n", __func__);
14516c3a
TM		 7307 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7308 return;
2050f0cc
AA		 7309 switch (task->tk_status) {
7310 case -NFS4ERR_DELAY:
7311 case -NFS4ERR_GRACE:
7312 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7313 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7314 task->tk_status = 0;
a8a4ae3a
AA		 7315 /* fall through */
7316 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7317 rpc_restart_call_prepare(task);
2050f0cc
AA		 7318 return;
7319 }
2050f0cc
AA		 7320 dprintk("<-- %s\n", __func__);
7321}
7322
17280175 7323static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7324 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7325 .rpc_call_done = nfs4_get_lease_time_done,
7326};
7327
7328int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7329{
7330 struct rpc_task *task;
7331 struct nfs4_get_lease_time_args args;
7332 struct nfs4_get_lease_time_res res = {
7333 .lr_fsinfo = fsinfo,
7334 };
7335 struct nfs4_get_lease_time_data data = {
7336 .args = &args,
7337 .res = &res,
7338 .clp = clp,
7339 };
7340 struct rpc_message msg = {
7341 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7342 .rpc_argp = &args,
7343 .rpc_resp = &res,
7344 };
7345 struct rpc_task_setup task_setup = {
7346 .rpc_client = clp->cl_rpcclient,
7347 .rpc_message = &msg,
7348 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7349 .callback_data = &data,
7350 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7351 };
7352 int status;
7353
a9c92d6b 7354 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7355 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7356 dprintk("--> %s\n", __func__);
7357 task = rpc_run_task(&task_setup);
7358
7359 if (IS_ERR(task))
7360 status = PTR_ERR(task);
7361 else {
7362 status = task->tk_status;
7363 rpc_put_task(task);
7364 }
7365 dprintk("<-- %s return %d\n", __func__, status);
7366
7367 return status;
7368}
7369
fc931582
AA		 7370/*
7371 * Initialize the values to be used by the client in CREATE_SESSION
7372 * If nfs4_init_session set the fore channel request and response sizes,
7373 * use them.
7374 *
7375 * Set the back channel max_resp_sz_cached to zero to force the client to
7376 * always set csa_cachethis to FALSE because the current implementation
7377 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7378 */
6b26cc8c
CL		 7379static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args,
7380 struct rpc_clnt *clnt)
fc931582 7381{
18aad3d5 7382 unsigned int max_rqst_sz, max_resp_sz;
6b26cc8c 7383 unsigned int max_bc_payload = rpc_max_bc_payload(clnt);
18aad3d5
AA		 7384
7385 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7386 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7387
fc931582 7388 /* Fore channel attributes */
18aad3d5
AA		 7389 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7390 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7391 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7392 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7393
7394 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7395 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7396 __func__,
7397 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7398 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7399
7400 /* Back channel attributes */
6b26cc8c
CL		 7401 args->bc_attrs.max_rqst_sz = max_bc_payload;
7402 args->bc_attrs.max_resp_sz = max_bc_payload;
fc931582
AA		 7403 args->bc_attrs.max_resp_sz_cached = 0;
7404 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
f4f58ed1 7405 args->bc_attrs.max_reqs = NFS41_BC_MAX_CALLBACKS;
fc931582
AA		 7406
7407 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7408 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7409 __func__,
7410 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7411 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7412 args->bc_attrs.max_reqs);
7413}
7414
79969dd1
TM		 7415static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7416 struct nfs41_create_session_res *res)
8d35301d 7417{
43c2e885 7418 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7419 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7420
43c2e885
BF		 7421 if (rcvd->max_resp_sz > sent->max_resp_sz)
7422 return -EINVAL;
7423 /*
7424 * Our requested max_ops is the minimum we need; we're not
7425 * prepared to break up compounds into smaller pieces than that.
7426 * So, no point even trying to continue if the server won't
7427 * cooperate:
7428 */
7429 if (rcvd->max_ops < sent->max_ops)
7430 return -EINVAL;
7431 if (rcvd->max_reqs == 0)
7432 return -EINVAL;
b4b9a0c1
VG		 7433 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7434 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7435 return 0;
8d35301d
AA		 7436}
7437
79969dd1
TM		 7438static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7439 struct nfs41_create_session_res *res)
43c2e885
BF		 7440{
7441 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7442 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7443
b1c0df5f
TM		 7444 if (!(res->flags & SESSION4_BACK_CHAN))
7445 goto out;
43c2e885
BF		 7446 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7447 return -EINVAL;
7448 if (rcvd->max_resp_sz < sent->max_resp_sz)
7449 return -EINVAL;
7450 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7451 return -EINVAL;
7452 /* These would render the backchannel useless: */
b4b9a0c1 7453 if (rcvd->max_ops != sent->max_ops)
43c2e885 7454 return -EINVAL;
b4b9a0c1 7455 if (rcvd->max_reqs != sent->max_reqs)
43c2e885 7456 return -EINVAL;
b1c0df5f 7457out:
43c2e885
BF		 7458 return 0;
7459}
8d35301d 7460
8d35301d 7461static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7462 struct nfs41_create_session_res *res)
8d35301d 7463{
43c2e885 7464 int ret;
8d35301d 7465
79969dd1 7466 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7467 if (ret)
7468 return ret;
79969dd1
TM		 7469 return nfs4_verify_back_channel_attrs(args, res);
7470}
7471
7472static void nfs4_update_session(struct nfs4_session *session,
7473 struct nfs41_create_session_res *res)
7474{
7475 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7476 /* Mark client id and session as being confirmed */
7477 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7478 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7479 session->flags = res->flags;
7480 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7481 if (res->flags & SESSION4_BACK_CHAN)
7482 memcpy(&session->bc_attrs, &res->bc_attrs,
7483 sizeof(session->bc_attrs));
8d35301d
AA		 7484}
7485
848f5bda
TM		 7486static int _nfs4_proc_create_session(struct nfs_client *clp,
7487 struct rpc_cred *cred)
fc931582
AA		 7488{
7489 struct nfs4_session *session = clp->cl_session;
7490 struct nfs41_create_session_args args = {
7491 .client = clp,
79969dd1
TM		 7492 .clientid = clp->cl_clientid,
7493 .seqid = clp->cl_seqid,
fc931582
AA		 7494 .cb_program = NFS4_CALLBACK,
7495 };
79969dd1
TM		 7496 struct nfs41_create_session_res res;
7497
fc931582
AA		 7498 struct rpc_message msg = {
7499 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7500 .rpc_argp = &args,
7501 .rpc_resp = &res,
848f5bda 7502 .rpc_cred = cred,
fc931582
AA		 7503 };
7504 int status;
7505
6b26cc8c 7506 nfs4_init_channel_attrs(&args, clp->cl_rpcclient);
0f91421e 7507 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7508
1bd714f2 7509 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7510 trace_nfs4_create_session(clp, status);
fc931582 7511
43095d39 7512 if (!status) {
8d35301d 7513 /* Verify the session's negotiated channel_attrs values */
79969dd1 7514 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7515 /* Increment the clientid slot sequence id */
79969dd1
TM		 7516 if (clp->cl_seqid == res.seqid)
7517 clp->cl_seqid++;
7518 if (status)
7519 goto out;
7520 nfs4_update_session(session, &res);
fc931582 7521 }
79969dd1 7522out:
fc931582
AA		 7523 return status;
7524}
7525
7526/*
7527 * Issues a CREATE_SESSION operation to the server.
7528 * It is the responsibility of the caller to verify the session is
7529 * expired before calling this routine.
7530 */
848f5bda 7531int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7532{
7533 int status;
7534 unsigned *ptr;
fc931582
AA		 7535 struct nfs4_session *session = clp->cl_session;
7536
7537 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7538
848f5bda 7539 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7540 if (status)
7541 goto out;
7542
aacd5537
AA		 7543 /* Init or reset the session slot tables */
7544 status = nfs4_setup_session_slot_tables(session);
7545 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7546 if (status)
7547 goto out;
7548
7549 ptr = (unsigned *)&session->sess_id.data[0];
7550 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7551 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7552out:
7553 dprintk("<-- %s\n", __func__);
7554 return status;
7555}
7556
0f3e66c6
AA		 7557/*
7558 * Issue the over-the-wire RPC DESTROY_SESSION.
7559 * The caller must serialize access to this routine.
7560 */
848f5bda
TM		 7561int nfs4_proc_destroy_session(struct nfs4_session *session,
7562 struct rpc_cred *cred)
0f3e66c6 7563{
848f5bda
TM		 7564 struct rpc_message msg = {
7565 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7566 .rpc_argp = session,
7567 .rpc_cred = cred,
7568 };
0f3e66c6 7569 int status = 0;
0f3e66c6
AA		 7570
7571 dprintk("--> nfs4_proc_destroy_session\n");
7572
7573 /* session is still being setup */
e11259f9
TM		 7574 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7575 return 0;
0f3e66c6 7576
1bd714f2 7577 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7578 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7579
7580 if (status)
08106ac7 7581 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7582 "Session has been destroyed regardless...\n", status);
7583
7584 dprintk("<-- nfs4_proc_destroy_session\n");
7585 return status;
7586}
7587
fc01cea9
AA		 7588/*
7589 * Renew the cl_session lease.
7590 */
d5f8d3fe
TM		 7591struct nfs4_sequence_data {
7592 struct nfs_client *clp;
7593 struct nfs4_sequence_args args;
7594 struct nfs4_sequence_res res;
7595};
7596
dc96aef9
AB		 7597static void nfs41_sequence_release(void *data)
7598{
d5f8d3fe
TM		 7599 struct nfs4_sequence_data *calldata = data;
7600 struct nfs_client *clp = calldata->clp;
dc96aef9 7601
7135840f
AB		 7602 if (atomic_read(&clp->cl_count) > 1)
7603 nfs4_schedule_state_renewal(clp);
7604 nfs_put_client(clp);
d5f8d3fe 7605 kfree(calldata);
dc96aef9
AB		 7606}
7607
aa5190d0
TM		 7608static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7609{
7610 switch(task->tk_status) {
7611 case -NFS4ERR_DELAY:
aa5190d0
TM		 7612 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7613 return -EAGAIN;
7614 default:
0400a6b0 7615 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7616 }
7617 return 0;
7618}
7619
dc96aef9 7620static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7621{
d5f8d3fe
TM		 7622 struct nfs4_sequence_data *calldata = data;
7623 struct nfs_client *clp = calldata->clp;
fc01cea9 7624
14516c3a
TM		 7625 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7626 return;
fc01cea9 7627
c6d01c6f 7628 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7629 if (task->tk_status < 0) {
7630 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7631 if (atomic_read(&clp->cl_count) == 1)
7632 goto out;
fc01cea9 7633
aa5190d0
TM		 7634 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7635 rpc_restart_call_prepare(task);
fc01cea9
AA		 7636 return;
7637 }
7638 }
fc01cea9 7639 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7640out:
fc01cea9
AA		 7641 dprintk("<-- %s\n", __func__);
7642}
7643
7644static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7645{
d5f8d3fe
TM		 7646 struct nfs4_sequence_data *calldata = data;
7647 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7648 struct nfs4_sequence_args *args;
7649 struct nfs4_sequence_res *res;
7650
fc01cea9
AA		 7651 args = task->tk_msg.rpc_argp;
7652 res = task->tk_msg.rpc_resp;
7653
d9afbd1b 7654 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7655}
7656
7657static const struct rpc_call_ops nfs41_sequence_ops = {
7658 .rpc_call_done = nfs41_sequence_call_done,
7659 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7660 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7661};
7662
8fe72bac
TM		 7663static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7664 struct rpc_cred *cred,
7665 bool is_privileged)
fc01cea9 7666{
d5f8d3fe 7667 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7668 struct rpc_message msg = {
7669 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7670 .rpc_cred = cred,
7671 };
71ac6da9
TM		 7672 struct rpc_task_setup task_setup_data = {
7673 .rpc_client = clp->cl_rpcclient,
7674 .rpc_message = &msg,
8fe72bac 7675 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7676 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7677 };
fc01cea9 7678
7135840f 7679 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7680 return ERR_PTR(-EIO);
dfb4f309 7681 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7682 if (calldata == NULL) {
7135840f 7683 nfs_put_client(clp);
71ac6da9 7684 return ERR_PTR(-ENOMEM);
fc01cea9 7685 }
a9c92d6b 7686 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7687 if (is_privileged)
7688 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7689 msg.rpc_argp = &calldata->args;
7690 msg.rpc_resp = &calldata->res;
7691 calldata->clp = clp;
71ac6da9 7692 task_setup_data.callback_data = calldata;
fc01cea9 7693
71ac6da9
TM		 7694 return rpc_run_task(&task_setup_data);
7695}
7696
2f60ea6b 7697static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7698{
7699 struct rpc_task *task;
7700 int ret = 0;
7701
2f60ea6b 7702 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7703 return -EAGAIN;
8fe72bac 7704 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7705 if (IS_ERR(task))
7706 ret = PTR_ERR(task);
7707 else
bf294b41 7708 rpc_put_task_async(task);
71ac6da9
TM		 7709 dprintk("<-- %s status=%d\n", __func__, ret);
7710 return ret;
7711}
7712
7713static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7714{
7715 struct rpc_task *task;
7716 int ret;
7717
8fe72bac 7718 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7719 if (IS_ERR(task)) {
7720 ret = PTR_ERR(task);
7721 goto out;
7722 }
7723 ret = rpc_wait_for_completion_task(task);
be824167 7724 if (!ret)
71ac6da9
TM		 7725 ret = task->tk_status;
7726 rpc_put_task(task);
7727out:
7728 dprintk("<-- %s status=%d\n", __func__, ret);
7729 return ret;
fc01cea9
AA		 7730}
7731
fce5c838
RL		 7732struct nfs4_reclaim_complete_data {
7733 struct nfs_client *clp;
7734 struct nfs41_reclaim_complete_args arg;
7735 struct nfs41_reclaim_complete_res res;
7736};
7737
7738static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7739{
7740 struct nfs4_reclaim_complete_data *calldata = data;
7741
d9afbd1b
TM		 7742 nfs41_setup_sequence(calldata->clp->cl_session,
7743 &calldata->arg.seq_args,
7744 &calldata->res.seq_res,
7745 task);
fce5c838
RL		 7746}
7747
aa5190d0
TM		 7748static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7749{
7750 switch(task->tk_status) {
7751 case 0:
7752 case -NFS4ERR_COMPLETE_ALREADY:
7753 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7754 break;
7755 case -NFS4ERR_DELAY:
aa5190d0 7756 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7757 /* fall through */
7758 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7759 return -EAGAIN;
7760 default:
0400a6b0 7761 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7762 }
7763 return 0;
7764}
7765
fce5c838
RL		 7766static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7767{
7768 struct nfs4_reclaim_complete_data *calldata = data;
7769 struct nfs_client *clp = calldata->clp;
7770 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7771
7772 dprintk("--> %s\n", __func__);
14516c3a
TM		 7773 if (!nfs41_sequence_done(task, res))
7774 return;
fce5c838 7775
c6d01c6f 7776 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7777 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7778 rpc_restart_call_prepare(task);
7779 return;
7780 }
fce5c838
RL		 7781 dprintk("<-- %s\n", __func__);
7782}
7783
7784static void nfs4_free_reclaim_complete_data(void *data)
7785{
7786 struct nfs4_reclaim_complete_data *calldata = data;
7787
7788 kfree(calldata);
7789}
7790
7791static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7792 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7793 .rpc_call_done = nfs4_reclaim_complete_done,
7794 .rpc_release = nfs4_free_reclaim_complete_data,
7795};
7796
7797/*
7798 * Issue a global reclaim complete.
7799 */
965e9c23
TM		 7800static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7801 struct rpc_cred *cred)
fce5c838
RL		 7802{
7803 struct nfs4_reclaim_complete_data *calldata;
7804 struct rpc_task *task;
7805 struct rpc_message msg = {
7806 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7807 .rpc_cred = cred,
fce5c838
RL		 7808 };
7809 struct rpc_task_setup task_setup_data = {
7810 .rpc_client = clp->cl_rpcclient,
7811 .rpc_message = &msg,
7812 .callback_ops = &nfs4_reclaim_complete_call_ops,
7813 .flags = RPC_TASK_ASYNC,
7814 };
7815 int status = -ENOMEM;
7816
7817 dprintk("--> %s\n", __func__);
8535b2be 7818 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7819 if (calldata == NULL)
7820 goto out;
7821 calldata->clp = clp;
7822 calldata->arg.one_fs = 0;
fce5c838 7823
a9c92d6b 7824 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7825 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7826 msg.rpc_argp = &calldata->arg;
7827 msg.rpc_resp = &calldata->res;
7828 task_setup_data.callback_data = calldata;
7829 task = rpc_run_task(&task_setup_data);
acf82b85 7830 if (IS_ERR(task)) {
fce5c838 7831 status = PTR_ERR(task);
acf82b85
DC		 7832 goto out;
7833 }
c34c32ea
AA		 7834 status = nfs4_wait_for_completion_rpc_task(task);
7835 if (status == 0)
7836 status = task->tk_status;
fce5c838 7837 rpc_put_task(task);
acf82b85 7838 return 0;
fce5c838
RL		 7839out:
7840 dprintk("<-- %s status=%d\n", __func__, status);
7841 return status;
7842}
b1f69b75
AA		 7843
7844static void
7845nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7846{
7847 struct nfs4_layoutget *lgp = calldata;
c31663d4 7848 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7849 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7850
7851 dprintk("--> %s\n", __func__);
183d9e7b
JL		 7852 nfs41_setup_sequence(session, &lgp->args.seq_args,
7853 &lgp->res.seq_res, task);
7854 dprintk("<-- %s\n", __func__);
b1f69b75
AA		 7855}
7856
7857static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7858{
7859 struct nfs4_layoutget *lgp = calldata;
183d9e7b
JL		 7860
7861 dprintk("--> %s\n", __func__);
7862 nfs41_sequence_done(task, &lgp->res.seq_res);
7863 dprintk("<-- %s\n", __func__);
7864}
7865
7866static int
7867nfs4_layoutget_handle_exception(struct rpc_task *task,
7868 struct nfs4_layoutget *lgp, struct nfs4_exception *exception)
7869{
ee314c2a
TM		 7870 struct inode *inode = lgp->args.inode;
7871 struct nfs_server *server = NFS_SERVER(inode);
7872 struct pnfs_layout_hdr *lo;
183d9e7b 7873 int status = task->tk_status;
b1f69b75 7874
ed7e5423 7875 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7876
183d9e7b 7877 switch (status) {
b1f69b75 7878 case 0:
ee314c2a 7879 goto out;
7c1e6e58
PT		 7880
7881 /*
7882 * NFS4ERR_LAYOUTUNAVAILABLE means we are not supposed to use pnfs
7883 * on the file. set tk_status to -ENODATA to tell upper layer to
7884 * retry go inband.
7885 */
7886 case -NFS4ERR_LAYOUTUNAVAILABLE:
183d9e7b 7887 status = -ENODATA;
7c1e6e58 7888 goto out;
21b874c8
TM		 7889 /*
7890 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
7891 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
7892 */
7893 case -NFS4ERR_BADLAYOUT:
183d9e7b
JL		 7894 status = -EOVERFLOW;
7895 goto out;
ed7e5423
BH		 7896 /*
7897 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
21b874c8
TM		 7898 * (or clients) writing to the same RAID stripe except when
7899 * the minlength argument is 0 (see RFC5661 section 18.43.3).
183d9e7b
JL		 7900 *
7901 * Treat it like we would RECALLCONFLICT -- we retry for a little
7902 * while, and then eventually give up.
ed7e5423 7903 */
b1f69b75 7904 case -NFS4ERR_LAYOUTTRYLATER:
183d9e7b
JL		 7905 if (lgp->args.minlength == 0) {
7906 status = -EOVERFLOW;
7907 goto out;
ed7e5423 7908 }
183d9e7b
JL		 7909 /* Fallthrough */
7910 case -NFS4ERR_RECALLCONFLICT:
7911 nfs4_handle_exception(server, -NFS4ERR_RECALLCONFLICT,
7912 exception);
7913 status = -ERECALLCONFLICT;
7914 goto out;
ee314c2a
TM		 7915 case -NFS4ERR_EXPIRED:
7916 case -NFS4ERR_BAD_STATEID:
183d9e7b 7917 exception->timeout = 0;
ee314c2a 7918 spin_lock(&inode->i_lock);
2259f960
TM		 7919 if (nfs4_stateid_match(&lgp->args.stateid,
7920 &lgp->args.ctx->state->stateid)) {
ee314c2a
TM		 7921 spin_unlock(&inode->i_lock);
7922 /* If the open stateid was bad, then recover it. */
183d9e7b 7923 exception->state = lgp->args.ctx->state;
2259f960
TM		 7924 break;
7925 }
7926 lo = NFS_I(inode)->layout;
dd1beb3d
TM		 7927 if (lo && !test_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags) &&
7928 nfs4_stateid_match_other(&lgp->args.stateid, &lo->plh_stateid)) {
ee314c2a
TM		 7929 LIST_HEAD(head);
7930
defb8460
CH		 7931 /*
7932 * Mark the bad layout state as invalid, then retry
7933 * with the current stateid.
7934 */
8714d46d 7935 set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);
6d597e17 7936 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL, 0);
ee314c2a 7937 spin_unlock(&inode->i_lock);
ee314c2a 7938 pnfs_free_lseg_list(&head);
dd1beb3d
TM		 7939 status = -EAGAIN;
7940 goto out;
2259f960
TM		 7941 } else
7942 spin_unlock(&inode->i_lock);
b1f69b75 7943 }
183d9e7b
JL		 7944
7945 status = nfs4_handle_exception(server, status, exception);
7946 if (exception->retry)
7947 status = -EAGAIN;
ee314c2a 7948out:
b1f69b75 7949 dprintk("<-- %s\n", __func__);
183d9e7b 7950 return status;
b1f69b75
AA		 7951}
7952
8554116e
IK		 7953static size_t max_response_pages(struct nfs_server *server)
7954{
7955 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7956 return nfs_page_array_len(0, max_resp_sz);
7957}
7958
7959static void nfs4_free_pages(struct page **pages, size_t size)
7960{
7961 int i;
7962
7963 if (!pages)
7964 return;
7965
7966 for (i = 0; i < size; i++) {
7967 if (!pages[i])
7968 break;
7969 __free_page(pages[i]);
7970 }
7971 kfree(pages);
7972}
7973
7974static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7975{
7976 struct page **pages;
7977 int i;
7978
7979 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7980 if (!pages) {
7981 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7982 return NULL;
7983 }
7984
7985 for (i = 0; i < size; i++) {
7986 pages[i] = alloc_page(gfp_flags);
7987 if (!pages[i]) {
7988 dprintk("%s: failed to allocate page\n", __func__);
7989 nfs4_free_pages(pages, size);
7990 return NULL;
7991 }
7992 }
7993
7994 return pages;
7995}
7996
b1f69b75
AA		 7997static void nfs4_layoutget_release(void *calldata)
7998{
7999 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 8000 struct inode *inode = lgp->args.inode;
8001 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8002 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8003
8004 dprintk("--> %s\n", __func__);
8554116e 8005 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 8006 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 8007 put_nfs_open_context(lgp->args.ctx);
8008 kfree(calldata);
8009 dprintk("<-- %s\n", __func__);
8010}
8011
8012static const struct rpc_call_ops nfs4_layoutget_call_ops = {
8013 .rpc_call_prepare = nfs4_layoutget_prepare,
8014 .rpc_call_done = nfs4_layoutget_done,
8015 .rpc_release = nfs4_layoutget_release,
8016};
8017
a0b0a6e3 8018struct pnfs_layout_segment *
183d9e7b 8019nfs4_proc_layoutget(struct nfs4_layoutget *lgp, long *timeout, gfp_t gfp_flags)
b1f69b75 8020{
a47970ff
WAA		 8021 struct inode *inode = lgp->args.inode;
8022 struct nfs_server *server = NFS_SERVER(inode);
8554116e 8023 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 8024 struct rpc_task *task;
8025 struct rpc_message msg = {
8026 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
8027 .rpc_argp = &lgp->args,
8028 .rpc_resp = &lgp->res,
6ab59344 8029 .rpc_cred = lgp->cred,
b1f69b75
AA		 8030 };
8031 struct rpc_task_setup task_setup_data = {
8032 .rpc_client = server->client,
8033 .rpc_message = &msg,
8034 .callback_ops = &nfs4_layoutget_call_ops,
8035 .callback_data = lgp,
8036 .flags = RPC_TASK_ASYNC,
8037 };
a0b0a6e3 8038 struct pnfs_layout_segment *lseg = NULL;
bc23676c
TM		 8039 struct nfs4_exception exception = {
8040 .inode = inode,
8041 .timeout = *timeout,
8042 };
b1f69b75
AA		 8043 int status = 0;
8044
8045 dprintk("--> %s\n", __func__);
8046
4bd5a980
PT		 8047 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
8048 pnfs_get_layout_hdr(NFS_I(inode)->layout);
8049
8554116e
IK		 8050 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
8051 if (!lgp->args.layout.pages) {
8052 nfs4_layoutget_release(lgp);
a0b0a6e3 8053 return ERR_PTR(-ENOMEM);
8554116e
IK		 8054 }
8055 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
8056
35124a09 8057 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 8058 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 8059 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 8060
b1f69b75
AA		 8061 task = rpc_run_task(&task_setup_data);
8062 if (IS_ERR(task))
a0b0a6e3 8063 return ERR_CAST(task);
b1f69b75 8064 status = nfs4_wait_for_completion_rpc_task(task);
183d9e7b
JL		 8065 if (status == 0) {
8066 status = nfs4_layoutget_handle_exception(task, lgp, &exception);
8067 *timeout = exception.timeout;
8068 }
8069
1037e6ea
TM		 8070 trace_nfs4_layoutget(lgp->args.ctx,
8071 &lgp->args.range,
8072 &lgp->res.range,
48c9579a 8073 &lgp->res.stateid,
1037e6ea 8074 status);
183d9e7b 8075
085b7a45
WAA		 8076 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
8077 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 8078 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 8079 rpc_put_task(task);
8080 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 8081 if (status)
8082 return ERR_PTR(status);
8083 return lseg;
b1f69b75
AA		 8084}
8085
cbe82603
BH		 8086static void
8087nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8088{
8089 struct nfs4_layoutreturn *lrp = calldata;
8090
8091 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 8092 nfs41_setup_sequence(lrp->clp->cl_session,
8093 &lrp->args.seq_args,
8094 &lrp->res.seq_res,
8095 task);
cbe82603
BH		 8096}
8097
8098static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8099{
8100 struct nfs4_layoutreturn *lrp = calldata;
8101 struct nfs_server *server;
8102
8103 dprintk("--> %s\n", __func__);
8104
6ba7db34 8105 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 8106 return;
8107
8108 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 8109 switch (task->tk_status) {
8110 default:
8111 task->tk_status = 0;
8112 case 0:
8113 break;
8114 case -NFS4ERR_DELAY:
8478eaa1 8115 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 8116 break;
d00c5d43 8117 rpc_restart_call_prepare(task);
cbe82603
BH		 8118 return;
8119 }
cbe82603
BH		 8120 dprintk("<-- %s\n", __func__);
8121}
8122
8123static void nfs4_layoutreturn_release(void *calldata)
8124{
8125 struct nfs4_layoutreturn *lrp = calldata;
849b286f 8126 struct pnfs_layout_hdr *lo = lrp->args.layout;
c5d73716 8127 LIST_HEAD(freeme);
cbe82603
BH		 8128
8129 dprintk("--> %s\n", __func__);
849b286f 8130 spin_lock(&lo->plh_inode->i_lock);
6d597e17
JL		 8131 pnfs_mark_matching_lsegs_invalid(lo, &freeme, &lrp->args.range,
8132 be32_to_cpu(lrp->args.stateid.seqid));
0654cc72 8133 pnfs_mark_layout_returned_if_empty(lo);
849b286f
TM		 8134 if (lrp->res.lrs_present)
8135 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
d67ae825 8136 pnfs_clear_layoutreturn_waitbit(lo);
849b286f 8137 spin_unlock(&lo->plh_inode->i_lock);
c5d73716 8138 pnfs_free_lseg_list(&freeme);
70c3bd2b 8139 pnfs_put_layout_hdr(lrp->args.layout);
5a0ec8ac 8140 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 8141 kfree(calldata);
8142 dprintk("<-- %s\n", __func__);
8143}
8144
8145static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8146 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8147 .rpc_call_done = nfs4_layoutreturn_done,
8148 .rpc_release = nfs4_layoutreturn_release,
8149};
8150
6c16605d 8151int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 8152{
8153 struct rpc_task *task;
8154 struct rpc_message msg = {
8155 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8156 .rpc_argp = &lrp->args,
8157 .rpc_resp = &lrp->res,
9556000d 8158 .rpc_cred = lrp->cred,
cbe82603
BH		 8159 };
8160 struct rpc_task_setup task_setup_data = {
1771c577 8161 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8162 .rpc_message = &msg,
8163 .callback_ops = &nfs4_layoutreturn_call_ops,
8164 .callback_data = lrp,
8165 };
6c16605d 8166 int status = 0;
cbe82603 8167
99ade3c7
AE		 8168 nfs4_state_protect(NFS_SERVER(lrp->args.inode)->nfs_client,
8169 NFS_SP4_MACH_CRED_PNFS_CLEANUP,
8170 &task_setup_data.rpc_client, &msg);
8171
cbe82603 8172 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8173 if (!sync) {
8174 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8175 if (!lrp->inode) {
8176 nfs4_layoutreturn_release(lrp);
8177 return -EAGAIN;
8178 }
8179 task_setup_data.flags |= RPC_TASK_ASYNC;
8180 }
a9c92d6b 8181 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8182 task = rpc_run_task(&task_setup_data);
8183 if (IS_ERR(task))
8184 return PTR_ERR(task);
5a0ec8ac
TM		 8185 if (sync)
8186 status = task->tk_status;
48c9579a 8187 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
cbe82603
BH		 8188 dprintk("<-- %s status=%d\n", __func__, status);
8189 rpc_put_task(task);
8190 return status;
8191}
8192
b1f69b75 8193static int
cd5875fe
TM		 8194_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8195 struct pnfs_device *pdev,
8196 struct rpc_cred *cred)
b1f69b75
AA		 8197{
8198 struct nfs4_getdeviceinfo_args args = {
8199 .pdev = pdev,
4e590803
TM		 8200 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8201 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8202 };
8203 struct nfs4_getdeviceinfo_res res = {
8204 .pdev = pdev,
8205 };
8206 struct rpc_message msg = {
8207 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8208 .rpc_argp = &args,
8209 .rpc_resp = &res,
cd5875fe 8210 .rpc_cred = cred,
b1f69b75
AA		 8211 };
8212 int status;
8213
8214 dprintk("--> %s\n", __func__);
7c513058 8215 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8216 if (res.notification & ~args.notify_types)
8217 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8218 if (res.notification != args.notify_types)
8219 pdev->nocache = 1;
4e590803 8220
b1f69b75
AA		 8221 dprintk("<-- %s status=%d\n", __func__, status);
8222
8223 return status;
8224}
8225
cd5875fe
TM		 8226int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8227 struct pnfs_device *pdev,
8228 struct rpc_cred *cred)
b1f69b75
AA		 8229{
8230 struct nfs4_exception exception = { };
8231 int err;
8232
8233 do {
8234 err = nfs4_handle_exception(server,
cd5875fe 8235 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8236 &exception);
8237 } while (exception.retry);
8238 return err;
8239}
8240EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8241
863a3c6c
AA		 8242static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8243{
8244 struct nfs4_layoutcommit_data *data = calldata;
8245 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 8246 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 8247
d9afbd1b
TM		 8248 nfs41_setup_sequence(session,
8249 &data->args.seq_args,
8250 &data->res.seq_res,
8251 task);
863a3c6c
AA		 8252}
8253
8254static void
8255nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8256{
8257 struct nfs4_layoutcommit_data *data = calldata;
8258 struct nfs_server *server = NFS_SERVER(data->args.inode);
8259
6ba7db34 8260 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8261 return;
8262
8263 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8264 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8265 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8266 case -NFS4ERR_BADLAYOUT: /* no layout */
8267 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8268 task->tk_status = 0;
e59d27e0 8269 case 0:
e59d27e0
TM		 8270 break;
8271 default:
8478eaa1 8272 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8273 rpc_restart_call_prepare(task);
8274 return;
8275 }
8276 }
863a3c6c
AA		 8277}
8278
8279static void nfs4_layoutcommit_release(void *calldata)
8280{
8281 struct nfs4_layoutcommit_data *data = calldata;
8282
db29c089 8283 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8284 nfs_post_op_update_inode_force_wcc(data->args.inode,
8285 data->res.fattr);
863a3c6c 8286 put_rpccred(data->cred);
472e2594 8287 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8288 kfree(data);
8289}
8290
8291static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8292 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8293 .rpc_call_done = nfs4_layoutcommit_done,
8294 .rpc_release = nfs4_layoutcommit_release,
8295};
8296
8297int
ef311537 8298nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8299{
8300 struct rpc_message msg = {
8301 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8302 .rpc_argp = &data->args,
8303 .rpc_resp = &data->res,
8304 .rpc_cred = data->cred,
8305 };
8306 struct rpc_task_setup task_setup_data = {
8307 .task = &data->task,
8308 .rpc_client = NFS_CLIENT(data->args.inode),
8309 .rpc_message = &msg,
8310 .callback_ops = &nfs4_layoutcommit_ops,
8311 .callback_data = data,
863a3c6c
AA		 8312 };
8313 struct rpc_task *task;
8314 int status = 0;
8315
b4839ebe
KM		 8316 dprintk("NFS: initiating layoutcommit call. sync %d "
8317 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8318 data->args.lastbytewritten,
8319 data->args.inode->i_ino);
8320
472e2594
TM		 8321 if (!sync) {
8322 data->inode = nfs_igrab_and_active(data->args.inode);
8323 if (data->inode == NULL) {
8324 nfs4_layoutcommit_release(data);
8325 return -EAGAIN;
8326 }
8327 task_setup_data.flags = RPC_TASK_ASYNC;
8328 }
a9c92d6b 8329 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8330 task = rpc_run_task(&task_setup_data);
8331 if (IS_ERR(task))
8332 return PTR_ERR(task);
472e2594
TM		 8333 if (sync)
8334 status = task->tk_status;
48c9579a 8335 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
863a3c6c
AA		 8336 dprintk("%s: status %d\n", __func__, status);
8337 rpc_put_task(task);
8338 return status;
8339}
fca78d6d 8340
97431204
AA		 8341/**
8342 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8343 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8344 */
fca78d6d
BS		 8345static int
8346_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8347 struct nfs_fsinfo *info,
8348 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8349{
8350 struct nfs41_secinfo_no_name_args args = {
8351 .style = SECINFO_STYLE_CURRENT_FH,
8352 };
8353 struct nfs4_secinfo_res res = {
8354 .flavors = flavors,
8355 };
8356 struct rpc_message msg = {
8357 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8358 .rpc_argp = &args,
8359 .rpc_resp = &res,
8360 };
b1b3e136 8361 struct rpc_clnt *clnt = server->client;
7cb852df 8362 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8363 int status;
8364
8365 if (use_integrity) {
8366 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8367 cred = nfs4_get_clid_cred(server->nfs_client);
8368 msg.rpc_cred = cred;
b1b3e136
WAA		 8369 }
8370
8371 dprintk("--> %s\n", __func__);
8372 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8373 &res.seq_res, 0);
8374 dprintk("<-- %s status=%d\n", __func__, status);
8375
7cb852df
WAA		 8376 if (cred)
8377 put_rpccred(cred);
b1b3e136
WAA		 8378
8379 return status;
fca78d6d
BS		 8380}
8381
8382static int
8383nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8384 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8385{
8386 struct nfs4_exception exception = { };
8387 int err;
8388 do {
b1b3e136
WAA		 8389 /* first try using integrity protection */
8390 err = -NFS4ERR_WRONGSEC;
8391
8392 /* try to use integrity protection with machine cred */
8393 if (_nfs4_is_integrity_protected(server->nfs_client))
8394 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8395 flavors, true);
8396
8397 /*
8398 * if unable to use integrity protection, or SECINFO with
8399 * integrity protection returns NFS4ERR_WRONGSEC (which is
8400 * disallowed by spec, but exists in deployed servers) use
8401 * the current filesystem's rpc_client and the user cred.
8402 */
8403 if (err == -NFS4ERR_WRONGSEC)
8404 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8405 flavors, false);
8406
fca78d6d
BS		 8407 switch (err) {
8408 case 0:
8409 case -NFS4ERR_WRONGSEC:
78b19bae 8410 case -ENOTSUPP:
05e9cfb4 8411 goto out;
fca78d6d
BS		 8412 default:
8413 err = nfs4_handle_exception(server, err, &exception);
8414 }
8415 } while (exception.retry);
05e9cfb4 8416out:
fca78d6d
BS		 8417 return err;
8418}
8419
8420static int
8421nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8422 struct nfs_fsinfo *info)
8423{
8424 int err;
8425 struct page *page;
367156d9 8426 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8427 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8428 struct nfs4_secinfo4 *secinfo;
8429 int i;
fca78d6d
BS		 8430
8431 page = alloc_page(GFP_KERNEL);
8432 if (!page) {
8433 err = -ENOMEM;
8434 goto out;
8435 }
8436
8437 flavors = page_address(page);
8438 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8439
8440 /*
8441 * Fall back on "guess and check" method if
8442 * the server doesn't support SECINFO_NO_NAME
8443 */
78b19bae 8444 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8445 err = nfs4_find_root_sec(server, fhandle, info);
8446 goto out_freepage;
8447 }
8448 if (err)
8449 goto out_freepage;
8450
58a8cf12
WAA		 8451 for (i = 0; i < flavors->num_flavors; i++) {
8452 secinfo = &flavors->flavors[i];
8453
8454 switch (secinfo->flavor) {
8455 case RPC_AUTH_NULL:
8456 case RPC_AUTH_UNIX:
8457 case RPC_AUTH_GSS:
8458 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8459 &secinfo->flavor_info);
8460 break;
8461 default:
8462 flavor = RPC_AUTH_MAXFLAVOR;
8463 break;
8464 }
8465
4d4b69dd
WAA		 8466 if (!nfs_auth_info_match(&server->auth_info, flavor))
8467 flavor = RPC_AUTH_MAXFLAVOR;
8468
58a8cf12
WAA		 8469 if (flavor != RPC_AUTH_MAXFLAVOR) {
8470 err = nfs4_lookup_root_sec(server, fhandle,
8471 info, flavor);
8472 if (!err)
8473 break;
8474 }
8475 }
8476
8477 if (flavor == RPC_AUTH_MAXFLAVOR)
8478 err = -EPERM;
fca78d6d
BS		 8479
8480out_freepage:
8481 put_page(page);
8482 if (err == -EACCES)
8483 return -EPERM;
8484out:
8485 return err;
8486}
1cab0652 8487
ab7cb0df
TM		 8488static int _nfs41_test_stateid(struct nfs_server *server,
8489 nfs4_stateid *stateid,
8490 struct rpc_cred *cred)
7d974794
BS		 8491{
8492 int status;
8493 struct nfs41_test_stateid_args args = {
1cab0652 8494 .stateid = stateid,
7d974794
BS		 8495 };
8496 struct nfs41_test_stateid_res res;
8497 struct rpc_message msg = {
8498 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8499 .rpc_argp = &args,
8500 .rpc_resp = &res,
ab7cb0df 8501 .rpc_cred = cred,
7d974794 8502 };
3787d506
WAA		 8503 struct rpc_clnt *rpc_client = server->client;
8504
8505 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8506 &rpc_client, &msg);
1cab0652 8507
38527b15 8508 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8509 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8510 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8511 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8512 &args.seq_args, &res.seq_res);
38527b15
CL		 8513 if (status != NFS_OK) {
8514 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8515 return status;
38527b15
CL		 8516 }
8517 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8518 return -res.status;
7d974794
BS		 8519}
8520
38527b15
CL		 8521/**
8522 * nfs41_test_stateid - perform a TEST_STATEID operation
8523 *
8524 * @server: server / transport on which to perform the operation
8525 * @stateid: state ID to test
ab7cb0df 8526 * @cred: credential
38527b15
CL		 8527 *
8528 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8529 * Otherwise a negative NFS4ERR value is returned if the operation
8530 * failed or the state ID is not currently valid.
8531 */
ab7cb0df
TM		 8532static int nfs41_test_stateid(struct nfs_server *server,
8533 nfs4_stateid *stateid,
8534 struct rpc_cred *cred)
7d974794
BS		 8535{
8536 struct nfs4_exception exception = { };
8537 int err;
8538 do {
ab7cb0df 8539 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8540 if (err != -NFS4ERR_DELAY)
8541 break;
8542 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8543 } while (exception.retry);
8544 return err;
8545}
9aeda35f 8546
7c1d5fae
TM		 8547struct nfs_free_stateid_data {
8548 struct nfs_server *server;
8549 struct nfs41_free_stateid_args args;
9aeda35f 8550 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8551};
8552
8553static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8554{
8555 struct nfs_free_stateid_data *data = calldata;
8556 nfs41_setup_sequence(nfs4_get_session(data->server),
8557 &data->args.seq_args,
8558 &data->res.seq_res,
8559 task);
8560}
8561
8562static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8563{
8564 struct nfs_free_stateid_data *data = calldata;
8565
8566 nfs41_sequence_done(task, &data->res.seq_res);
8567
8568 switch (task->tk_status) {
8569 case -NFS4ERR_DELAY:
8478eaa1 8570 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8571 rpc_restart_call_prepare(task);
8572 }
8573}
8574
8575static void nfs41_free_stateid_release(void *calldata)
8576{
8577 kfree(calldata);
8578}
8579
17f26b12 8580static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8581 .rpc_call_prepare = nfs41_free_stateid_prepare,
8582 .rpc_call_done = nfs41_free_stateid_done,
8583 .rpc_release = nfs41_free_stateid_release,
8584};
8585
8586static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8587 nfs4_stateid *stateid,
ab7cb0df 8588 struct rpc_cred *cred,
7c1d5fae
TM		 8589 bool privileged)
8590{
9aeda35f
BS		 8591 struct rpc_message msg = {
8592 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8593 .rpc_cred = cred,
9aeda35f 8594 };
7c1d5fae
TM		 8595 struct rpc_task_setup task_setup = {
8596 .rpc_client = server->client,
8597 .rpc_message = &msg,
8598 .callback_ops = &nfs41_free_stateid_ops,
8599 .flags = RPC_TASK_ASYNC,
8600 };
8601 struct nfs_free_stateid_data *data;
9aeda35f 8602
3787d506
WAA		 8603 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8604 &task_setup.rpc_client, &msg);
8605
38527b15 8606 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8607 data = kmalloc(sizeof(*data), GFP_NOFS);
8608 if (!data)
8609 return ERR_PTR(-ENOMEM);
8610 data->server = server;
8611 nfs4_stateid_copy(&data->args.stateid, stateid);
8612
8613 task_setup.callback_data = data;
8614
8615 msg.rpc_argp = &data->args;
8616 msg.rpc_resp = &data->res;
a9c92d6b 8617 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8618 if (privileged)
8619 nfs4_set_sequence_privileged(&data->args.seq_args);
8620
8621 return rpc_run_task(&task_setup);
9aeda35f
BS		 8622}
8623
38527b15
CL		 8624/**
8625 * nfs41_free_stateid - perform a FREE_STATEID operation
8626 *
8627 * @server: server / transport on which to perform the operation
8628 * @stateid: state ID to release
ab7cb0df 8629 * @cred: credential
38527b15
CL		 8630 *
8631 * Returns NFS_OK if the server freed "stateid". Otherwise a
8632 * negative NFS4ERR value is returned.
8633 */
ab7cb0df
TM		 8634static int nfs41_free_stateid(struct nfs_server *server,
8635 nfs4_stateid *stateid,
8636 struct rpc_cred *cred)
9aeda35f 8637{
7c1d5fae
TM		 8638 struct rpc_task *task;
8639 int ret;
8640
ab7cb0df 8641 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8642 if (IS_ERR(task))
8643 return PTR_ERR(task);
8644 ret = rpc_wait_for_completion_task(task);
8645 if (!ret)
8646 ret = task->tk_status;
8647 rpc_put_task(task);
8648 return ret;
9aeda35f 8649}
36281caa 8650
f1cdae87
JL		 8651static void
8652nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8653{
8654 struct rpc_task *task;
ab7cb0df 8655 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8656
ab7cb0df 8657 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8658 nfs4_free_lock_state(server, lsp);
8659 if (IS_ERR(task))
f1cdae87 8660 return;
c8b2d0bf 8661 rpc_put_task(task);
c8b2d0bf
TM		 8662}
8663
36281caa
TM		 8664static bool nfs41_match_stateid(const nfs4_stateid *s1,
8665 const nfs4_stateid *s2)
8666{
93b717fd
TM		 8667 if (s1->type != s2->type)
8668 return false;
8669
2d2f24ad 8670 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8671 return false;
8672
2d2f24ad 8673 if (s1->seqid == s2->seqid)
36281caa 8674 return true;
2d2f24ad 8675 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8676 return true;
8677
8678 return false;
8679}
8680
557134a3
AA		 8681#endif /* CONFIG_NFS_V4_1 */
8682
36281caa
TM		 8683static bool nfs4_match_stateid(const nfs4_stateid *s1,
8684 const nfs4_stateid *s2)
8685{
f597c537 8686 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8687}
8688
8689
17280175 8690static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8691 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8692 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8693 .recover_open = nfs4_open_reclaim,
8694 .recover_lock = nfs4_lock_reclaim,
591d71cb 8695 .establish_clid = nfs4_init_clientid,
05f4c350 8696 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8697};
8698
591d71cb 8699#if defined(CONFIG_NFS_V4_1)
17280175 8700static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8701 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8702 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8703 .recover_open = nfs4_open_reclaim,
8704 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8705 .establish_clid = nfs41_init_clientid,
fce5c838 8706 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8707 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8708};
8709#endif /* CONFIG_NFS_V4_1 */
8710
17280175 8711static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8712 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8713 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8714 .recover_open = nfs40_open_expired,
591d71cb
AA		 8715 .recover_lock = nfs4_lock_expired,
8716 .establish_clid = nfs4_init_clientid,
8717};
8718
8719#if defined(CONFIG_NFS_V4_1)
17280175 8720static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8721 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8722 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8723 .recover_open = nfs41_open_expired,
8724 .recover_lock = nfs41_lock_expired,
4d643d1d 8725 .establish_clid = nfs41_init_clientid,
1da177e4 8726};
591d71cb 8727#endif /* CONFIG_NFS_V4_1 */
1da177e4 8728
17280175 8729static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8730 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8731 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8732 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8733};
8734
8735#if defined(CONFIG_NFS_V4_1)
17280175 8736static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8737 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8738 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8739 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8740};
8741#endif
8742
ec011fe8 8743static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8744 .get_locations = _nfs40_proc_get_locations,
44c99933 8745 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8746};
8747
8748#if defined(CONFIG_NFS_V4_1)
8749static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8750 .get_locations = _nfs41_proc_get_locations,
44c99933 8751 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8752};
8753#endif /* CONFIG_NFS_V4_1 */
8754
97dc1359
TM		 8755static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8756 .minor_version = 0,
39c6daae
TM		 8757 .init_caps = NFS_CAP_READDIRPLUS
8758 | NFS_CAP_ATOMIC_OPEN
39c6daae 8759 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8760 .init_client = nfs40_init_client,
8761 .shutdown_client = nfs40_shutdown_client,
36281caa 8762 .match_stateid = nfs4_match_stateid,
fca78d6d 8763 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8764 .free_lock_state = nfs4_release_lockowner,
63f5f796 8765 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 8766 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8767 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8768 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8769 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8770 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8771};
8772
8773#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 8774static struct nfs_seqid *
8775nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8776{
8777 return NULL;
8778}
8779
97dc1359
TM		 8780static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8781 .minor_version = 1,
39c6daae
TM		 8782 .init_caps = NFS_CAP_READDIRPLUS
8783 | NFS_CAP_ATOMIC_OPEN
3b66486c 8784 | NFS_CAP_POSIX_LOCK
49f9a0fa 8785 | NFS_CAP_STATEID_NFSV41
e983120e 8786 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8787 .init_client = nfs41_init_client,
8788 .shutdown_client = nfs41_shutdown_client,
36281caa 8789 .match_stateid = nfs41_match_stateid,
fca78d6d 8790 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8791 .free_lock_state = nfs41_free_lock_state,
63f5f796 8792 .alloc_seqid = nfs_alloc_no_seqid,
9915ea7e 8793 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8794 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8795 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8796 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8797 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8798};
8799#endif
8800
42c2c424
SD		 8801#if defined(CONFIG_NFS_V4_2)
8802static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8803 .minor_version = 2,
7017310a
BS		 8804 .init_caps = NFS_CAP_READDIRPLUS
8805 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 8806 | NFS_CAP_POSIX_LOCK
8807 | NFS_CAP_STATEID_NFSV41
e983120e 8808 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 8809 | NFS_CAP_ALLOCATE
2e72448b 8810 | NFS_CAP_COPY
624bd5b7 8811 | NFS_CAP_DEALLOCATE
6c5a0d89 8812 | NFS_CAP_SEEK
e5341f3a
PT		 8813 | NFS_CAP_LAYOUTSTATS
8814 | NFS_CAP_CLONE,
abf79bb3
CL		 8815 .init_client = nfs41_init_client,
8816 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8817 .match_stateid = nfs41_match_stateid,
8818 .find_root_sec = nfs41_find_root_sec,
7017310a 8819 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8820 .call_sync_ops = &nfs41_call_sync_ops,
63f5f796 8821 .alloc_seqid = nfs_alloc_no_seqid,
42c2c424
SD		 8822 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8823 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8824 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 8825 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 8826};
8827#endif
8828
97dc1359
TM		 8829const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8830 [0] = &nfs_v4_0_minor_ops,
8831#if defined(CONFIG_NFS_V4_1)
8832 [1] = &nfs_v4_1_minor_ops,
8833#endif
42c2c424
SD		 8834#if defined(CONFIG_NFS_V4_2)
8835 [2] = &nfs_v4_2_minor_ops,
8836#endif
97dc1359
TM		 8837};
8838
c4803c49
AG		 8839ssize_t nfs4_listxattr(struct dentry *dentry, char *list, size_t size)
8840{
8841 ssize_t error, error2;
8842
8843 error = generic_listxattr(dentry, list, size);
8844 if (error < 0)
8845 return error;
8846 if (list) {
8847 list += error;
8848 size -= error;
8849 }
8850
8851 error2 = nfs4_listxattr_nfs4_label(d_inode(dentry), list, size);
8852 if (error2 < 0)
8853 return error2;
8854 return error + error2;
8855}
8856
17f26b12 8857static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8858 .create = nfs_create,
8859 .lookup = nfs_lookup,
8860 .atomic_open = nfs_atomic_open,
8861 .link = nfs_link,
8862 .unlink = nfs_unlink,
8863 .symlink = nfs_symlink,
8864 .mkdir = nfs_mkdir,
8865 .rmdir = nfs_rmdir,
8866 .mknod = nfs_mknod,
8867 .rename = nfs_rename,
8868 .permission = nfs_permission,
8869 .getattr = nfs_getattr,
8870 .setattr = nfs_setattr,
8871 .getxattr = generic_getxattr,
8872 .setxattr = generic_setxattr,
c4803c49 8873 .listxattr = nfs4_listxattr,
73a79706
BS		 8874 .removexattr = generic_removexattr,
8875};
8876
92e1d5be 8877static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8878 .permission = nfs_permission,
8879 .getattr = nfs_getattr,
8880 .setattr = nfs_setattr,
64c2ce8b
AK		 8881 .getxattr = generic_getxattr,
8882 .setxattr = generic_setxattr,
c4803c49 8883 .listxattr = nfs4_listxattr,
64c2ce8b 8884 .removexattr = generic_removexattr,
6b3b5496
BF		 8885};
8886
509de811 8887const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8888 .version = 4, /* protocol version */
8889 .dentry_ops = &nfs4_dentry_operations,
8890 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8891 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8892 .file_ops = &nfs4_file_operations,
1da177e4 8893 .getroot = nfs4_proc_get_root,
281cad46 8894 .submount = nfs4_submount,
ff9099f2 8895 .try_mount = nfs4_try_mount,
1da177e4
LT		 8896 .getattr = nfs4_proc_getattr,
8897 .setattr = nfs4_proc_setattr,
8898 .lookup = nfs4_proc_lookup,
8899 .access = nfs4_proc_access,
8900 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8901 .create = nfs4_proc_create,
8902 .remove = nfs4_proc_remove,
8903 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8904 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8905 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8906 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8907 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8908 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8909 .link = nfs4_proc_link,
8910 .symlink = nfs4_proc_symlink,
8911 .mkdir = nfs4_proc_mkdir,
8912 .rmdir = nfs4_proc_remove,
8913 .readdir = nfs4_proc_readdir,
8914 .mknod = nfs4_proc_mknod,
8915 .statfs = nfs4_proc_statfs,
8916 .fsinfo = nfs4_proc_fsinfo,
8917 .pathconf = nfs4_proc_pathconf,
e9326dca 8918 .set_capabilities = nfs4_server_capabilities,
1da177e4 8919 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8920 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8921 .read_setup = nfs4_proc_read_setup,
ec06c096 8922 .read_done = nfs4_read_done,
1da177e4 8923 .write_setup = nfs4_proc_write_setup,
788e7a89 8924 .write_done = nfs4_write_done,
1da177e4 8925 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8926 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8927 .commit_done = nfs4_commit_done,
1da177e4 8928 .lock = nfs4_proc_lock,
e50a1c2e 8929 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8930 .close_context = nfs4_close_context,
2b484297 8931 .open_context = nfs4_atomic_open,
011e2a7f 8932 .have_delegation = nfs4_have_delegation,
57ec14c5 8933 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8934 .alloc_client = nfs4_alloc_client,
45a52a02 8935 .init_client = nfs4_init_client,
cdb7eced 8936 .free_client = nfs4_free_client,
1179acc6
BS		 8937 .create_server = nfs4_create_server,
8938 .clone_server = nfs_clone_server,
1da177e4
LT		 8939};
8940
64c2ce8b 8941static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
98e9cb57 8942 .name = XATTR_NAME_NFSV4_ACL,
64c2ce8b
AK		 8943 .list = nfs4_xattr_list_nfs4_acl,
8944 .get = nfs4_xattr_get_nfs4_acl,
8945 .set = nfs4_xattr_set_nfs4_acl,
8946};
8947
8948const struct xattr_handler *nfs4_xattr_handlers[] = {
8949 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8950#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8951 &nfs4_xattr_nfs4_label_handler,
8952#endif
64c2ce8b
AK		 8953 NULL
8954};
8955
1da177e4
LT		 8956/*
8957 * Local variables:
8958 * c-basic-offset: 8
8959 * End:
8960 */
Linux 6.x block layer and io_uring tree(s)