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nfs: do not initialise statics to 0
[mirror_ubuntu-hirsute-kernel.git] / fs / nfs / nfs4proc.c
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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
cdd4e68b 77struct nfs4_opendata;
864472e9 78static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 79static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 80static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
81934ddb 81static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 82static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
83static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 84static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
85 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 86 struct nfs4_state *state, struct nfs4_label *ilabel,
87 struct nfs4_label *olabel);
f062eb6c 88#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 89static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
90 struct rpc_cred *);
91static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
92 struct rpc_cred *);
f062eb6c 93#endif
aa9c2669
DQ		 94
95#ifdef CONFIG_NFS_V4_SECURITY_LABEL
96static inline struct nfs4_label *
97nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
98 struct iattr *sattr, struct nfs4_label *label)
99{
100 int err;
101
102 if (label == NULL)
103 return NULL;
104
105 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
106 return NULL;
107
aa9c2669
DQ		 108 err = security_dentry_init_security(dentry, sattr->ia_mode,
109 &dentry->d_name, (void **)&label->label, &label->len);
110 if (err == 0)
111 return label;
112
113 return NULL;
114}
115static inline void
116nfs4_label_release_security(struct nfs4_label *label)
117{
118 if (label)
119 security_release_secctx(label->label, label->len);
120}
121static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
122{
123 if (label)
124 return server->attr_bitmask;
125
126 return server->attr_bitmask_nl;
127}
128#else
129static inline struct nfs4_label *
130nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
131 struct iattr *sattr, struct nfs4_label *l)
132{ return NULL; }
133static inline void
134nfs4_label_release_security(struct nfs4_label *label)
135{ return; }
136static inline u32 *
137nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
138{ return server->attr_bitmask; }
139#endif
140
1da177e4 141/* Prevent leaks of NFSv4 errors into userland */
46f72f57 142static int nfs4_map_errors(int err)
1da177e4 143{
52567b03
TM		 144 if (err >= -1000)
145 return err;
146 switch (err) {
147 case -NFS4ERR_RESOURCE:
30005121
WAA		 148 case -NFS4ERR_LAYOUTTRYLATER:
149 case -NFS4ERR_RECALLCONFLICT:
52567b03 150 return -EREMOTEIO;
7ebb9315 151 case -NFS4ERR_WRONGSEC:
8897538e 152 case -NFS4ERR_WRONG_CRED:
7ebb9315 153 return -EPERM;
3ddeb7c5
TM		 154 case -NFS4ERR_BADOWNER:
155 case -NFS4ERR_BADNAME:
156 return -EINVAL;
fb13bfa7
TM		 157 case -NFS4ERR_SHARE_DENIED:
158 return -EACCES;
f25efd85
SD		 159 case -NFS4ERR_MINOR_VERS_MISMATCH:
160 return -EPROTONOSUPPORT;
6e3cf241
TM		 161 case -NFS4ERR_FILE_OPEN:
162 return -EBUSY;
52567b03 163 default:
1da177e4 164 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 165 __func__, -err);
52567b03 166 break;
1da177e4 167 }
52567b03 168 return -EIO;
1da177e4
LT		 169}
170
171/*
172 * This is our standard bitmap for GETATTR requests.
173 */
1549210f 174const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 175 FATTR4_WORD0_TYPE
176 | FATTR4_WORD0_CHANGE
177 | FATTR4_WORD0_SIZE
178 | FATTR4_WORD0_FSID
179 | FATTR4_WORD0_FILEID,
180 FATTR4_WORD1_MODE
181 | FATTR4_WORD1_NUMLINKS
182 | FATTR4_WORD1_OWNER
183 | FATTR4_WORD1_OWNER_GROUP
184 | FATTR4_WORD1_RAWDEV
185 | FATTR4_WORD1_SPACE_USED
186 | FATTR4_WORD1_TIME_ACCESS
187 | FATTR4_WORD1_TIME_METADATA
ea96d1ec
AS		 188 | FATTR4_WORD1_TIME_MODIFY
189 | FATTR4_WORD1_MOUNTED_ON_FILEID,
aa9c2669
DQ		 190#ifdef CONFIG_NFS_V4_SECURITY_LABEL
191 FATTR4_WORD2_SECURITY_LABEL
192#endif
1da177e4
LT		 193};
194
1549210f
TM		 195static const u32 nfs4_pnfs_open_bitmap[3] = {
196 FATTR4_WORD0_TYPE
197 | FATTR4_WORD0_CHANGE
198 | FATTR4_WORD0_SIZE
199 | FATTR4_WORD0_FSID
200 | FATTR4_WORD0_FILEID,
201 FATTR4_WORD1_MODE
202 | FATTR4_WORD1_NUMLINKS
203 | FATTR4_WORD1_OWNER
204 | FATTR4_WORD1_OWNER_GROUP
205 | FATTR4_WORD1_RAWDEV
206 | FATTR4_WORD1_SPACE_USED
207 | FATTR4_WORD1_TIME_ACCESS
208 | FATTR4_WORD1_TIME_METADATA
209 | FATTR4_WORD1_TIME_MODIFY,
210 FATTR4_WORD2_MDSTHRESHOLD
211};
212
e23008ec
AA		 213static const u32 nfs4_open_noattr_bitmap[3] = {
214 FATTR4_WORD0_TYPE
215 | FATTR4_WORD0_CHANGE
216 | FATTR4_WORD0_FILEID,
217};
218
a09df2ca 219const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 220 FATTR4_WORD0_FILES_AVAIL
221 | FATTR4_WORD0_FILES_FREE
222 | FATTR4_WORD0_FILES_TOTAL,
223 FATTR4_WORD1_SPACE_AVAIL
224 | FATTR4_WORD1_SPACE_FREE
225 | FATTR4_WORD1_SPACE_TOTAL
226};
227
a09df2ca 228const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 229 FATTR4_WORD0_MAXLINK
230 | FATTR4_WORD0_MAXNAME,
231 0
232};
233
dae100c2 234const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 235 | FATTR4_WORD0_MAXREAD
236 | FATTR4_WORD0_MAXWRITE
237 | FATTR4_WORD0_LEASE_TIME,
55b6e774 238 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 239 | FATTR4_WORD1_FS_LAYOUT_TYPES,
240 FATTR4_WORD2_LAYOUT_BLKSIZE
2a92ee92 241 | FATTR4_WORD2_CLONE_BLKSIZE
1da177e4
LT		 242};
243
a09df2ca 244const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 245 FATTR4_WORD0_TYPE
246 | FATTR4_WORD0_CHANGE
247 | FATTR4_WORD0_SIZE
248 | FATTR4_WORD0_FSID
249 | FATTR4_WORD0_FILEID
250 | FATTR4_WORD0_FS_LOCATIONS,
251 FATTR4_WORD1_MODE
252 | FATTR4_WORD1_NUMLINKS
253 | FATTR4_WORD1_OWNER
254 | FATTR4_WORD1_OWNER_GROUP
255 | FATTR4_WORD1_RAWDEV
256 | FATTR4_WORD1_SPACE_USED
257 | FATTR4_WORD1_TIME_ACCESS
258 | FATTR4_WORD1_TIME_METADATA
259 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 260 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 261};
262
bc4785cd 263static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 264 struct nfs4_readdir_arg *readdir)
265{
0dbb4c67 266 __be32 *start, *p;
1da177e4 267
1da177e4 268 if (cookie > 2) {
b7ef1956 269 readdir->cookie = cookie;
1da177e4
LT		 270 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
271 return;
272 }
273
274 readdir->cookie = 0;
275 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
276 if (cookie == 2)
277 return;
278
279 /*
280 * NFSv4 servers do not return entries for '.' and '..'
281 * Therefore, we fake these entries here. We let '.'
282 * have cookie 0 and '..' have cookie 1. Note that
283 * when talking to the server, we always send cookie 0
284 * instead of 1 or 2.
285 */
2b86ce2d 286 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 287
288 if (cookie == 0) {
289 *p++ = xdr_one; /* next */
290 *p++ = xdr_zero; /* cookie, first word */
291 *p++ = xdr_one; /* cookie, second word */
292 *p++ = xdr_one; /* entry len */
293 memcpy(p, ".\0\0\0", 4); /* entry */
294 p++;
295 *p++ = xdr_one; /* bitmap length */
296 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
297 *p++ = htonl(8); /* attribute buffer length */
2b0143b5 298 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
1da177e4
LT		 299 }
300
301 *p++ = xdr_one; /* next */
302 *p++ = xdr_zero; /* cookie, first word */
303 *p++ = xdr_two; /* cookie, second word */
304 *p++ = xdr_two; /* entry len */
305 memcpy(p, "..\0\0", 4); /* entry */
306 p++;
307 *p++ = xdr_one; /* bitmap length */
308 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
309 *p++ = htonl(8); /* attribute buffer length */
2b0143b5 310 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
1da177e4
LT		 311
312 readdir->pgbase = (char *)p - (char *)start;
313 readdir->count -= readdir->pgbase;
2b86ce2d 314 kunmap_atomic(start);
1da177e4
LT		 315}
316
8478eaa1
N		 317static long nfs4_update_delay(long *timeout)
318{
319 long ret;
320 if (!timeout)
321 return NFS4_POLL_RETRY_MAX;
322 if (*timeout <= 0)
323 *timeout = NFS4_POLL_RETRY_MIN;
324 if (*timeout > NFS4_POLL_RETRY_MAX)
325 *timeout = NFS4_POLL_RETRY_MAX;
326 ret = *timeout;
327 *timeout <<= 1;
328 return ret;
329}
330
65de872e
TM		 331static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
332{
333 int res = 0;
334
335 might_sleep();
336
8478eaa1
N		 337 freezable_schedule_timeout_killable_unsafe(
338 nfs4_update_delay(timeout));
65de872e
TM		 339 if (fatal_signal_pending(current))
340 res = -ERESTARTSYS;
65de872e
TM		 341 return res;
342}
343
344/* This is the error handling routine for processes that are allowed
345 * to sleep.
346 */
b3c2aa07
TM		 347static int nfs4_do_handle_exception(struct nfs_server *server,
348 int errorcode, struct nfs4_exception *exception)
65de872e
TM		 349{
350 struct nfs_client *clp = server->nfs_client;
9e33bed5 351 struct nfs4_state *state = exception->state;
3114ea7a 352 struct inode *inode = exception->inode;
65de872e
TM		 353 int ret = errorcode;
354
b3c2aa07
TM		 355 exception->delay = 0;
356 exception->recovering = 0;
65de872e
TM		 357 exception->retry = 0;
358 switch(errorcode) {
359 case 0:
360 return 0;
3114ea7a 361 case -NFS4ERR_OPENMODE:
5ba12443
TM		 362 case -NFS4ERR_DELEG_REVOKED:
363 case -NFS4ERR_ADMIN_REVOKED:
364 case -NFS4ERR_BAD_STATEID:
4816fdad
TM		 365 if (inode && nfs_async_inode_return_delegation(inode,
366 NULL) == 0)
367 goto wait_on_recovery;
3114ea7a
TM		 368 if (state == NULL)
369 break;
5d422301
TM		 370 ret = nfs4_schedule_stateid_recovery(server, state);
371 if (ret < 0)
372 break;
3114ea7a 373 goto wait_on_recovery;
0ced63d1 374 case -NFS4ERR_EXPIRED:
5d422301
TM		 375 if (state != NULL) {
376 ret = nfs4_schedule_stateid_recovery(server, state);
377 if (ret < 0)
378 break;
379 }
65de872e 380 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 381 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 382 nfs4_schedule_lease_recovery(clp);
383 goto wait_on_recovery;
519ae255
CL		 384 case -NFS4ERR_MOVED:
385 ret = nfs4_schedule_migration_recovery(server);
386 if (ret < 0)
387 break;
388 goto wait_on_recovery;
8ef2f8d4
CL		 389 case -NFS4ERR_LEASE_MOVED:
390 nfs4_schedule_lease_moved_recovery(clp);
391 goto wait_on_recovery;
03391693 392#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 393 case -NFS4ERR_BADSESSION:
394 case -NFS4ERR_BADSLOT:
395 case -NFS4ERR_BAD_HIGH_SLOT:
396 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
397 case -NFS4ERR_DEADSESSION:
398 case -NFS4ERR_SEQ_FALSE_RETRY:
399 case -NFS4ERR_SEQ_MISORDERED:
400 dprintk("%s ERROR: %d Reset session\n", __func__,
401 errorcode);
9f594791 402 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 403 goto wait_on_recovery;
03391693 404#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 405 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 406 if (exception->timeout > HZ) {
407 /* We have retried a decent amount, time to
408 * fail
409 */
410 ret = -EBUSY;
411 break;
412 }
65de872e 413 case -NFS4ERR_DELAY:
2598ed34
TM		 414 nfs_inc_server_stats(server, NFSIOS_DELAY);
415 case -NFS4ERR_GRACE:
b3c2aa07
TM		 416 exception->delay = 1;
417 return 0;
418
a8a4ae3a 419 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 420 case -NFS4ERR_OLD_STATEID:
421 exception->retry = 1;
b064eca2
TM		 422 break;
423 case -NFS4ERR_BADOWNER:
424 /* The following works around a Linux server bug! */
425 case -NFS4ERR_BADNAME:
426 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
427 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
428 exception->retry = 1;
429 printk(KERN_WARNING "NFS: v4 server %s "
430 "does not accept raw "
431 "uid/gids. "
432 "Reenabling the idmapper.\n",
433 server->nfs_client->cl_hostname);
434 }
65de872e
TM		 435 }
436 /* We failed to handle the error */
437 return nfs4_map_errors(ret);
0400a6b0 438wait_on_recovery:
b3c2aa07
TM		 439 exception->recovering = 1;
440 return 0;
441}
442
443/* This is the error handling routine for processes that are allowed
444 * to sleep.
445 */
446int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
447{
448 struct nfs_client *clp = server->nfs_client;
449 int ret;
450
451 ret = nfs4_do_handle_exception(server, errorcode, exception);
452 if (exception->delay) {
453 ret = nfs4_delay(server->client, &exception->timeout);
454 goto out_retry;
455 }
456 if (exception->recovering) {
457 ret = nfs4_wait_clnt_recover(clp);
458 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
459 return -EIO;
460 goto out_retry;
461 }
462 return ret;
463out_retry:
a2c0b9e2
TM		 464 if (ret == 0)
465 exception->retry = 1;
466 return ret;
65de872e
TM		 467}
468
037fc980
TM		 469static int
470nfs4_async_handle_exception(struct rpc_task *task, struct nfs_server *server,
471 int errorcode, struct nfs4_exception *exception)
472{
473 struct nfs_client *clp = server->nfs_client;
474 int ret;
475
476 ret = nfs4_do_handle_exception(server, errorcode, exception);
477 if (exception->delay) {
478 rpc_delay(task, nfs4_update_delay(&exception->timeout));
479 goto out_retry;
480 }
481 if (exception->recovering) {
482 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
483 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
484 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
485 goto out_retry;
486 }
519ae255 487 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
037fc980
TM		 488 ret = -EIO;
489 return ret;
490out_retry:
a2c0b9e2
TM		 491 if (ret == 0)
492 exception->retry = 1;
493 return ret;
65de872e
TM		 494}
495
037fc980
TM		 496static int
497nfs4_async_handle_error(struct rpc_task *task, struct nfs_server *server,
498 struct nfs4_state *state, long *timeout)
499{
500 struct nfs4_exception exception = {
501 .state = state,
502 };
503
504 if (task->tk_status >= 0)
505 return 0;
506 if (timeout)
507 exception.timeout = *timeout;
508 task->tk_status = nfs4_async_handle_exception(task, server,
509 task->tk_status,
510 &exception);
511 if (exception.delay && timeout)
512 *timeout = exception.timeout;
513 if (exception.retry)
514 return -EAGAIN;
515 return 0;
516}
517
a5250def
WAA		 518/*
519 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
520 * or 'false' otherwise.
521 */
522static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
523{
524 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
525
526 if (flavor == RPC_AUTH_GSS_KRB5I ||
527 flavor == RPC_AUTH_GSS_KRB5P)
528 return true;
529
530 return false;
531}
65de872e 532
452e9352 533static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 534{
1da177e4
LT		 535 spin_lock(&clp->cl_lock);
536 if (time_before(clp->cl_last_renewal,timestamp))
537 clp->cl_last_renewal = timestamp;
538 spin_unlock(&clp->cl_lock);
539}
540
452e9352
TM		 541static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
542{
be824167
TM		 543 struct nfs_client *clp = server->nfs_client;
544
545 if (!nfs4_has_session(clp))
546 do_renew_lease(clp, timestamp);
452e9352
TM		 547}
548
2a3eb2b9
CL		 549struct nfs4_call_sync_data {
550 const struct nfs_server *seq_server;
551 struct nfs4_sequence_args *seq_args;
552 struct nfs4_sequence_res *seq_res;
553};
554
be3a5d23
TM		 555void nfs4_init_sequence(struct nfs4_sequence_args *args,
556 struct nfs4_sequence_res *res, int cache_reply)
a9c92d6b
CL		 557{
558 args->sa_slot = NULL;
559 args->sa_cache_this = cache_reply;
560 args->sa_privileged = 0;
561
562 res->sr_slot = NULL;
563}
564
565static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
566{
567 args->sa_privileged = 1;
568}
569
cb04ad2a
PT		 570int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
571 struct nfs4_sequence_args *args,
572 struct nfs4_sequence_res *res,
573 struct rpc_task *task)
3bd2384a 574{
3bd2384a
CL		 575 struct nfs4_slot *slot;
576
577 /* slot already allocated? */
578 if (res->sr_slot != NULL)
579 goto out_start;
580
581 spin_lock(&tbl->slot_tbl_lock);
582 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
583 goto out_sleep;
584
585 slot = nfs4_alloc_slot(tbl);
586 if (IS_ERR(slot)) {
587 if (slot == ERR_PTR(-ENOMEM))
588 task->tk_timeout = HZ >> 2;
589 goto out_sleep;
590 }
591 spin_unlock(&tbl->slot_tbl_lock);
592
593 args->sa_slot = slot;
594 res->sr_slot = slot;
595
596out_start:
597 rpc_call_start(task);
598 return 0;
599
600out_sleep:
601 if (args->sa_privileged)
602 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
603 NULL, RPC_PRIORITY_PRIVILEGED);
604 else
605 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
606 spin_unlock(&tbl->slot_tbl_lock);
607 return -EAGAIN;
608}
cb04ad2a 609EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
3bd2384a
CL		 610
611static int nfs40_sequence_done(struct rpc_task *task,
612 struct nfs4_sequence_res *res)
613{
614 struct nfs4_slot *slot = res->sr_slot;
615 struct nfs4_slot_table *tbl;
616
cab92c19 617 if (slot == NULL)
3bd2384a
CL		 618 goto out;
619
620 tbl = slot->table;
621 spin_lock(&tbl->slot_tbl_lock);
622 if (!nfs41_wake_and_assign_slot(tbl, slot))
623 nfs4_free_slot(tbl, slot);
624 spin_unlock(&tbl->slot_tbl_lock);
625
626 res->sr_slot = NULL;
627out:
628 return 1;
629}
630
cccef3b9
AA		 631#if defined(CONFIG_NFS_V4_1)
632
d185a334 633static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 634{
e3725ec0 635 struct nfs4_session *session;
13615871 636 struct nfs4_slot_table *tbl;
a13ce7c6 637 struct nfs4_slot *slot = res->sr_slot;
c10e4498 638 bool send_new_highest_used_slotid = false;
13615871 639
a13ce7c6 640 tbl = slot->table;
e3725ec0 641 session = tbl->session;
ea028ac9 642
35dc1d74 643 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 644 /* Be nice to the server: try to ensure that the last transmitted
645 * value for highest_user_slotid <= target_highest_slotid
646 */
647 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
648 send_new_highest_used_slotid = true;
649
a13ce7c6 650 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 651 send_new_highest_used_slotid = false;
652 goto out_unlock;
653 }
a13ce7c6 654 nfs4_free_slot(tbl, slot);
c10e4498
TM		 655
656 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
657 send_new_highest_used_slotid = false;
b75ad4cd 658out_unlock:
35dc1d74 659 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 660 res->sr_slot = NULL;
c10e4498 661 if (send_new_highest_used_slotid)
3f10a6af 662 nfs41_notify_server(session->clp);
13615871
AA		 663}
664
f9c96fcc 665int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 666{
e3725ec0 667 struct nfs4_session *session;
a13ce7c6 668 struct nfs4_slot *slot = res->sr_slot;
14516c3a 669 struct nfs_client *clp;
ac20d163 670 bool interrupted = false;
85563073 671 int ret = 1;
b0df806c 672
a13ce7c6
TM		 673 if (slot == NULL)
674 goto out_noaction;
468f8613
BS		 675 /* don't increment the sequence number if the task wasn't sent */
676 if (!RPC_WAS_SENT(task))
b0df806c
AA		 677 goto out;
678
e3725ec0 679 session = slot->table->session;
933602e3 680
ac20d163
TM		 681 if (slot->interrupted) {
682 slot->interrupted = 0;
683 interrupted = true;
684 }
685
2f92ae34 686 trace_nfs4_sequence_done(session, res);
691daf3b 687 /* Check the SEQUENCE operation status */
14516c3a
TM		 688 switch (res->sr_status) {
689 case 0:
b0df806c 690 /* Update the slot's sequence and clientid lease timer */
933602e3 691 ++slot->seq_nr;
e3725ec0 692 clp = session->clp;
8e63b6a8 693 do_renew_lease(clp, res->sr_timestamp);
0629e370 694 /* Check sequence flags */
b15c7cdd 695 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
464ee9f9 696 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 697 break;
ac20d163
TM		 698 case 1:
699 /*
700 * sr_status remains 1 if an RPC level error occurred.
701 * The server may or may not have processed the sequence
702 * operation..
703 * Mark the slot as having hosted an interrupted RPC call.
704 */
705 slot->interrupted = 1;
706 goto out;
14516c3a
TM		 707 case -NFS4ERR_DELAY:
708 /* The server detected a resend of the RPC call and
709 * returned NFS4ERR_DELAY as per Section 2.10.6.2
710 * of RFC5661.
711 */
df2fabff 712 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 713 __func__,
df2fabff 714 slot->slot_nr,
933602e3 715 slot->seq_nr);
14516c3a 716 goto out_retry;
85563073
TM		 717 case -NFS4ERR_BADSLOT:
718 /*
719 * The slot id we used was probably retired. Try again
720 * using a different slot id.
721 */
e8794440
TM		 722 goto retry_nowait;
723 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 724 /*
725 * Was the last operation on this sequence interrupted?
726 * If so, retry after bumping the sequence number.
727 */
728 if (interrupted) {
729 ++slot->seq_nr;
730 goto retry_nowait;
731 }
e8794440
TM		 732 /*
733 * Could this slot have been previously retired?
734 * If so, then the server may be expecting seq_nr = 1!
735 */
8e63b6a8
TM		 736 if (slot->seq_nr != 1) {
737 slot->seq_nr = 1;
738 goto retry_nowait;
739 }
740 break;
e8794440
TM		 741 case -NFS4ERR_SEQ_FALSE_RETRY:
742 ++slot->seq_nr;
743 goto retry_nowait;
14516c3a
TM		 744 default:
745 /* Just update the slot sequence no. */
933602e3 746 ++slot->seq_nr;
b0df806c
AA		 747 }
748out:
749 /* The session may be reset by one of the error handlers. */
750 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 751 nfs41_sequence_free_slot(res);
a13ce7c6 752out_noaction:
85563073 753 return ret;
e8794440
TM		 754retry_nowait:
755 if (rpc_restart_call_prepare(task)) {
756 task->tk_status = 0;
757 ret = 0;
758 }
759 goto out;
14516c3a 760out_retry:
d05dd4e9 761 if (!rpc_restart_call(task))
14516c3a
TM		 762 goto out;
763 rpc_delay(task, NFS4_POLL_RETRY_MAX);
764 return 0;
b0df806c 765}
f9c96fcc 766EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 767
2c4b131d 768int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 769{
e3725ec0 770 if (res->sr_slot == NULL)
14516c3a 771 return 1;
3bd2384a
CL		 772 if (!res->sr_slot->table->session)
773 return nfs40_sequence_done(task, res);
14516c3a 774 return nfs41_sequence_done(task, res);
df896455 775}
2c4b131d 776EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 777
dc70d7b3 778int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 779 struct nfs4_sequence_args *args,
780 struct nfs4_sequence_res *res,
ce5039c1
AA		 781 struct rpc_task *task)
782{
fbcd4abc
AA		 783 struct nfs4_slot *slot;
784 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 785
786 dprintk("--> %s\n", __func__);
ce5039c1 787 /* slot already allocated? */
dfb4f309 788 if (res->sr_slot != NULL)
d9afbd1b 789 goto out_success;
ce5039c1 790
fbcd4abc
AA		 791 tbl = &session->fc_slot_table;
792
69d206b5
TM		 793 task->tk_timeout = 0;
794
fbcd4abc 795 spin_lock(&tbl->slot_tbl_lock);
774d5f14 796 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 797 !args->sa_privileged) {
0b1c8fc4 798 /* The state manager will wait until the slot table is empty */
0b1c8fc4 799 dprintk("%s session is draining\n", __func__);
7b939a3f 800 goto out_sleep;
689cf5c1
AB		 801 }
802
2dc03b7f 803 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 804 if (IS_ERR(slot)) {
805 /* If out of memory, try again in 1/4 second */
806 if (slot == ERR_PTR(-ENOMEM))
807 task->tk_timeout = HZ >> 2;
fbcd4abc 808 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 809 goto out_sleep;
fbcd4abc
AA		 810 }
811 spin_unlock(&tbl->slot_tbl_lock);
812
2b2fa717 813 args->sa_slot = slot;
fbcd4abc 814
e8d92382 815 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 816 slot->slot_nr, slot->seq_nr);
fbcd4abc 817
dfb4f309 818 res->sr_slot = slot;
8e63b6a8 819 res->sr_timestamp = jiffies;
2a6e26cd 820 res->sr_status_flags = 0;
fbcd4abc
AA		 821 /*
822 * sr_status is only set in decode_sequence, and so will remain
823 * set to 1 if an rpc level failure occurs.
824 */
825 res->sr_status = 1;
2f92ae34 826 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 827out_success:
828 rpc_call_start(task);
ce5039c1 829 return 0;
7b939a3f 830out_sleep:
8fe72bac
TM		 831 /* Privileged tasks are queued with top priority */
832 if (args->sa_privileged)
1e1093c7
TM		 833 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
834 NULL, RPC_PRIORITY_PRIVILEGED);
835 else
836 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 837 spin_unlock(&tbl->slot_tbl_lock);
838 return -EAGAIN;
ce5039c1 839}
dc70d7b3 840EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 841
5a580e0a
CL		 842static int nfs4_setup_sequence(const struct nfs_server *server,
843 struct nfs4_sequence_args *args,
844 struct nfs4_sequence_res *res,
845 struct rpc_task *task)
ce5039c1 846{
035168ab 847 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 848 int ret = 0;
849
3bd2384a 850 if (!session)
cb04ad2a
PT		 851 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
852 args, res, task);
035168ab 853
e8d92382 854 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 855 __func__, session->clp, session, res->sr_slot ?
e8d92382 856 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 857
9d12b216 858 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 859
ce5039c1
AA		 860 dprintk("<-- %s status=%d\n", __func__, ret);
861 return ret;
862}
863
ce5039c1
AA		 864static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
865{
2a3eb2b9 866 struct nfs4_call_sync_data *data = calldata;
6ba7db34 867 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 868
035168ab
TM		 869 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
870
d9afbd1b 871 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 872}
873
69ab40c4
AA		 874static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
875{
2a3eb2b9 876 struct nfs4_call_sync_data *data = calldata;
69ab40c4 877
14516c3a 878 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 879}
880
17280175 881static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 882 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 883 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 884};
885
3bd2384a
CL		 886#else /* !CONFIG_NFS_V4_1 */
887
9915ea7e
CL		 888static int nfs4_setup_sequence(const struct nfs_server *server,
889 struct nfs4_sequence_args *args,
890 struct nfs4_sequence_res *res,
891 struct rpc_task *task)
892{
cb04ad2a
PT		 893 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
894 args, res, task);
9915ea7e
CL		 895}
896
2c4b131d
PT		 897int nfs4_sequence_done(struct rpc_task *task,
898 struct nfs4_sequence_res *res)
9915ea7e 899{
3bd2384a 900 return nfs40_sequence_done(task, res);
9915ea7e 901}
2c4b131d 902EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 903
904#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 905
906static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
907{
908 struct nfs4_call_sync_data *data = calldata;
909 nfs4_setup_sequence(data->seq_server,
910 data->seq_args, data->seq_res, task);
911}
912
913static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
914{
915 struct nfs4_call_sync_data *data = calldata;
916 nfs4_sequence_done(task, data->seq_res);
917}
918
919static const struct rpc_call_ops nfs40_call_sync_ops = {
920 .rpc_call_prepare = nfs40_call_sync_prepare,
921 .rpc_call_done = nfs40_call_sync_done,
922};
923
7c513058
BS		 924static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
925 struct nfs_server *server,
ce5039c1
AA		 926 struct rpc_message *msg,
927 struct nfs4_sequence_args *args,
8fe72bac 928 struct nfs4_sequence_res *res)
ce5039c1
AA		 929{
930 int ret;
931 struct rpc_task *task;
9915ea7e 932 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 933 struct nfs4_call_sync_data data = {
035168ab 934 .seq_server = server,
ce5039c1
AA		 935 .seq_args = args,
936 .seq_res = res,
ce5039c1
AA		 937 };
938 struct rpc_task_setup task_setup = {
7c513058 939 .rpc_client = clnt,
ce5039c1 940 .rpc_message = msg,
9915ea7e 941 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 942 .callback_data = &data
943 };
944
ce5039c1
AA		 945 task = rpc_run_task(&task_setup);
946 if (IS_ERR(task))
947 ret = PTR_ERR(task);
948 else {
949 ret = task->tk_status;
950 rpc_put_task(task);
951 }
952 return ret;
953}
954
7c513058
BS		 955int nfs4_call_sync(struct rpc_clnt *clnt,
956 struct nfs_server *server,
e73b83f2
BS		 957 struct rpc_message *msg,
958 struct nfs4_sequence_args *args,
959 struct nfs4_sequence_res *res,
960 int cache_reply)
961{
a9c92d6b 962 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 963 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 964}
cccef3b9 965
38478b24 966static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 967{
38478b24 968 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 969
38478b24 970 spin_lock(&dir->i_lock);
359d7d1c 971 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 972 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 973 nfs_force_lookup_revalidate(dir);
a9a4a87a 974 dir->i_version = cinfo->after;
3235b403 975 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
de242c0b 976 nfs_fscache_invalidate(dir);
38478b24 977 spin_unlock(&dir->i_lock);
1da177e4
LT		 978}
979
e56e0b78 980struct nfs4_opendata {
c6d00e63 981 struct kref kref;
e56e0b78
TM		 982 struct nfs_openargs o_arg;
983 struct nfs_openres o_res;
cdd4e68b
TM		 984 struct nfs_open_confirmargs c_arg;
985 struct nfs_open_confirmres c_res;
6926afd1
TM		 986 struct nfs4_string owner_name;
987 struct nfs4_string group_name;
a49c2691 988 struct nfs4_label *a_label;
e56e0b78 989 struct nfs_fattr f_attr;
1775fd3e 990 struct nfs4_label *f_label;
e56e0b78 991 struct dentry *dir;
82a2c1b7 992 struct dentry *dentry;
e56e0b78 993 struct nfs4_state_owner *owner;
aac00a8d 994 struct nfs4_state *state;
e56e0b78 995 struct iattr attrs;
26e976a8 996 unsigned long timestamp;
3e309914 997 unsigned int rpc_done : 1;
5bc2afc2 998 unsigned int file_created : 1;
bdeca1b7 999 unsigned int is_recover : 1;
24ac23ab
TM		 1000 int rpc_status;
1001 int cancelled;
e56e0b78
TM		 1002};
1003
49f9a0fa
TM		 1004static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
1005 int err, struct nfs4_exception *exception)
1006{
1007 if (err != -EINVAL)
1008 return false;
1009 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1010 return false;
1011 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
1012 exception->retry = 1;
1013 return true;
1014}
1015
6ae37339
TM		 1016static u32
1017nfs4_map_atomic_open_share(struct nfs_server *server,
1018 fmode_t fmode, int openflags)
1019{
1020 u32 res = 0;
1021
1022 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
1023 case FMODE_READ:
1024 res = NFS4_SHARE_ACCESS_READ;
1025 break;
1026 case FMODE_WRITE:
1027 res = NFS4_SHARE_ACCESS_WRITE;
1028 break;
1029 case FMODE_READ|FMODE_WRITE:
1030 res = NFS4_SHARE_ACCESS_BOTH;
1031 }
1032 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
1033 goto out;
1034 /* Want no delegation if we're using O_DIRECT */
1035 if (openflags & O_DIRECT)
1036 res |= NFS4_SHARE_WANT_NO_DELEG;
1037out:
1038 return res;
1039}
1040
49f9a0fa
TM		 1041static enum open_claim_type4
1042nfs4_map_atomic_open_claim(struct nfs_server *server,
1043 enum open_claim_type4 claim)
1044{
1045 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
1046 return claim;
1047 switch (claim) {
1048 default:
1049 return claim;
1050 case NFS4_OPEN_CLAIM_FH:
1051 return NFS4_OPEN_CLAIM_NULL;
1052 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1053 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
1054 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1055 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
1056 }
1057}
2ced46c2
TM		 1058
1059static void nfs4_init_opendata_res(struct nfs4_opendata *p)
1060{
1061 p->o_res.f_attr = &p->f_attr;
1775fd3e 1062 p->o_res.f_label = p->f_label;
c1d51931
TM		 1063 p->o_res.seqid = p->o_arg.seqid;
1064 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 1065 p->o_res.server = p->o_arg.server;
5f657530 1066 p->o_res.access_request = p->o_arg.access;
2ced46c2 1067 nfs_fattr_init(&p->f_attr);
6926afd1 1068 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 1069}
1070
82a2c1b7 1071static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 1072 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 1073 const struct iattr *attrs,
1775fd3e 1074 struct nfs4_label *label,
4a1c0893 1075 enum open_claim_type4 claim,
8535b2be 1076 gfp_t gfp_mask)
e56e0b78 1077{
82a2c1b7 1078 struct dentry *parent = dget_parent(dentry);
2b0143b5 1079 struct inode *dir = d_inode(parent);
e56e0b78 1080 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1081 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 1082 struct nfs4_opendata *p;
1083
8535b2be 1084 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1085 if (p == NULL)
1086 goto err;
14c43f76
DQ		 1087
1088 p->f_label = nfs4_label_alloc(server, gfp_mask);
1089 if (IS_ERR(p->f_label))
1090 goto err_free_p;
1091
a49c2691
KM		 1092 p->a_label = nfs4_label_alloc(server, gfp_mask);
1093 if (IS_ERR(p->a_label))
1094 goto err_free_f;
1095
63f5f796
TM		 1096 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1097 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1098 if (IS_ERR(p->o_arg.seqid))
14c43f76 1099 goto err_free_label;
82a2c1b7
AV		 1100 nfs_sb_active(dentry->d_sb);
1101 p->dentry = dget(dentry);
e56e0b78
TM		 1102 p->dir = parent;
1103 p->owner = sp;
1104 atomic_inc(&sp->so_count);
dc0b027d
TM		 1105 p->o_arg.open_flags = flags;
1106 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
6ae37339
TM		 1107 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1108 fmode, flags);
ae2bb032
WAA		 1109 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1110 * will return permission denied for all bits until close */
1111 if (!(flags & O_EXCL)) {
1112 /* ask server to check for all possible rights as results
1113 * are cached */
1114 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1115 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1116 }
7539bbab 1117 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1118 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1119 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1120 p->o_arg.name = &dentry->d_name;
e56e0b78 1121 p->o_arg.server = server;
aa9c2669 1122 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1123 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
a49c2691 1124 p->o_arg.label = nfs4_label_copy(p->a_label, label);
49f9a0fa
TM		 1125 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1126 switch (p->o_arg.claim) {
4a1c0893
TM		 1127 case NFS4_OPEN_CLAIM_NULL:
1128 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1129 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1130 p->o_arg.fh = NFS_FH(dir);
1131 break;
1132 case NFS4_OPEN_CLAIM_PREVIOUS:
1133 case NFS4_OPEN_CLAIM_FH:
1134 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1135 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1136 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1137 }
536e43d1 1138 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1139 __u32 verf[2];
d77d76ff 1140
e56e0b78
TM		 1141 p->o_arg.u.attrs = &p->attrs;
1142 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1143
1144 verf[0] = jiffies;
1145 verf[1] = current->pid;
1146 memcpy(p->o_arg.u.verifier.data, verf,
1147 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1148 }
cdd4e68b
TM		 1149 p->c_arg.fh = &p->o_res.fh;
1150 p->c_arg.stateid = &p->o_res.stateid;
1151 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1152 nfs4_init_opendata_res(p);
c6d00e63 1153 kref_init(&p->kref);
e56e0b78 1154 return p;
14c43f76
DQ		 1155
1156err_free_label:
a49c2691
KM		 1157 nfs4_label_free(p->a_label);
1158err_free_f:
14c43f76
DQ		 1159 nfs4_label_free(p->f_label);
1160err_free_p:
e56e0b78
TM		 1161 kfree(p);
1162err:
1163 dput(parent);
1164 return NULL;
1165}
1166
c6d00e63 1167static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1168{
c6d00e63
TM		 1169 struct nfs4_opendata *p = container_of(kref,
1170 struct nfs4_opendata, kref);
82a2c1b7 1171 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1172
1173 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1174 if (p->state != NULL)
1175 nfs4_put_open_state(p->state);
c6d00e63 1176 nfs4_put_state_owner(p->owner);
14c43f76 1177
a49c2691 1178 nfs4_label_free(p->a_label);
14c43f76
DQ		 1179 nfs4_label_free(p->f_label);
1180
c6d00e63 1181 dput(p->dir);
82a2c1b7
AV		 1182 dput(p->dentry);
1183 nfs_sb_deactive(sb);
6926afd1 1184 nfs_fattr_free_names(&p->f_attr);
e911b815 1185 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1186 kfree(p);
1187}
1188
1189static void nfs4_opendata_put(struct nfs4_opendata *p)
1190{
1191 if (p != NULL)
1192 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1193}
1194
06f814a3
TM		 1195static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1196{
06f814a3
TM		 1197 int ret;
1198
06f814a3 1199 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1200 return ret;
1201}
1202
24311f88
TM		 1203static bool nfs4_mode_match_open_stateid(struct nfs4_state *state,
1204 fmode_t fmode)
1205{
1206 switch(fmode & (FMODE_READ|FMODE_WRITE)) {
1207 case FMODE_READ|FMODE_WRITE:
1208 return state->n_rdwr != 0;
1209 case FMODE_WRITE:
1210 return state->n_wronly != 0;
1211 case FMODE_READ:
1212 return state->n_rdonly != 0;
1213 }
1214 WARN_ON_ONCE(1);
1215 return false;
1216}
1217
dc0b027d 1218static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1219{
1220 int ret = 0;
dc0b027d 1221
536e43d1 1222 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1223 goto out;
1224 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1225 case FMODE_READ:
88069f77
TM		 1226 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1227 && state->n_rdonly != 0;
6ee41268
TM		 1228 break;
1229 case FMODE_WRITE:
88069f77
TM		 1230 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1231 && state->n_wronly != 0;
6ee41268
TM		 1232 break;
1233 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1234 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1235 && state->n_rdwr != 0;
6ee41268 1236 }
dc0b027d 1237out:
6ee41268
TM		 1238 return ret;
1239}
1240
2a606188
TM		 1241static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1242 enum open_claim_type4 claim)
aac00a8d 1243{
652f89f6
TM		 1244 if (delegation == NULL)
1245 return 0;
dc0b027d 1246 if ((delegation->type & fmode) != fmode)
aac00a8d 1247 return 0;
d25be546
TM		 1248 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1249 return 0;
2a606188
TM		 1250 switch (claim) {
1251 case NFS4_OPEN_CLAIM_NULL:
1252 case NFS4_OPEN_CLAIM_FH:
1253 break;
1254 case NFS4_OPEN_CLAIM_PREVIOUS:
1255 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1256 break;
1257 default:
1258 return 0;
1259 }
b7391f44 1260 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1261 return 1;
1262}
1263
dc0b027d 1264static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1265{
dc0b027d 1266 switch (fmode) {
e7616923
TM		 1267 case FMODE_WRITE:
1268 state->n_wronly++;
1269 break;
1270 case FMODE_READ:
1271 state->n_rdonly++;
1272 break;
1273 case FMODE_READ|FMODE_WRITE:
1274 state->n_rdwr++;
1275 }
dc0b027d 1276 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1277}
1278
4f14c194
TM		 1279static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1280{
1281 struct nfs_client *clp = state->owner->so_server->nfs_client;
1282 bool need_recover = false;
1283
1284 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1285 need_recover = true;
1286 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1287 need_recover = true;
1288 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1289 need_recover = true;
1290 if (need_recover)
1291 nfs4_state_mark_reclaim_nograce(clp, state);
1292}
1293
e999e80e
TM		 1294static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1295 nfs4_stateid *stateid)
1296{
1297 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1298 return true;
4f14c194
TM		 1299 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1300 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1301 return true;
4f14c194 1302 }
e999e80e
TM		 1303 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1304 return true;
1305 return false;
1306}
1307
f95549cf
TM		 1308static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1309{
3c38cbe2
TM		 1310 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1311 return;
f95549cf
TM		 1312 if (state->n_wronly)
1313 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1314 if (state->n_rdonly)
1315 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1316 if (state->n_rdwr)
1317 set_bit(NFS_O_RDWR_STATE, &state->flags);
3c38cbe2 1318 set_bit(NFS_OPEN_STATE, &state->flags);
f95549cf
TM		 1319}
1320
226056c5 1321static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
4a1e2feb 1322 nfs4_stateid *arg_stateid,
226056c5 1323 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1324{
226056c5
TM		 1325 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1326 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1327 case FMODE_WRITE:
1328 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1329 break;
1330 case FMODE_READ:
1331 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1332 break;
1333 case 0:
1334 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1335 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1336 clear_bit(NFS_OPEN_STATE, &state->flags);
1337 }
1338 if (stateid == NULL)
1339 return;
f95549cf 1340 /* Handle races with OPEN */
4a1e2feb
TM		 1341 if (!nfs4_stateid_match_other(arg_stateid, &state->open_stateid) ||
1342 (nfs4_stateid_match_other(stateid, &state->open_stateid) &&
1343 !nfs4_stateid_is_newer(stateid, &state->open_stateid))) {
f95549cf 1344 nfs_resync_open_stateid_locked(state);
226056c5 1345 return;
f95549cf 1346 }
003707c7 1347 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1348 nfs4_stateid_copy(&state->stateid, stateid);
1349 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1350}
1351
4a1e2feb
TM		 1352static void nfs_clear_open_stateid(struct nfs4_state *state,
1353 nfs4_stateid *arg_stateid,
1354 nfs4_stateid *stateid, fmode_t fmode)
226056c5
TM		 1355{
1356 write_seqlock(&state->seqlock);
4a1e2feb 1357 nfs_clear_open_stateid_locked(state, arg_stateid, stateid, fmode);
226056c5 1358 write_sequnlock(&state->seqlock);
4f14c194
TM		 1359 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1360 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1361}
1362
dc0b027d 1363static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1364{
dc0b027d 1365 switch (fmode) {
003707c7
TM		 1366 case FMODE_READ:
1367 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1368 break;
1369 case FMODE_WRITE:
1370 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1371 break;
1372 case FMODE_READ|FMODE_WRITE:
1373 set_bit(NFS_O_RDWR_STATE, &state->flags);
1374 }
e999e80e
TM		 1375 if (!nfs_need_update_open_stateid(state, stateid))
1376 return;
1377 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1378 nfs4_stateid_copy(&state->stateid, stateid);
1379 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1380}
1381
dc0b027d 1382static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1383{
8bda4e4c
TM		 1384 /*
1385 * Protect the call to nfs4_state_set_mode_locked and
1386 * serialise the stateid update
1387 */
1388 write_seqlock(&state->seqlock);
003707c7 1389 if (deleg_stateid != NULL) {
f597c537 1390 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1391 set_bit(NFS_DELEGATED_STATE, &state->flags);
1392 }
1393 if (open_stateid != NULL)
dc0b027d 1394 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1395 write_sequnlock(&state->seqlock);
1396 spin_lock(&state->owner->so_lock);
dc0b027d 1397 update_open_stateflags(state, fmode);
ec073428 1398 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1399}
1400
dc0b027d 1401static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1402{
1403 struct nfs_inode *nfsi = NFS_I(state->inode);
1404 struct nfs_delegation *deleg_cur;
1405 int ret = 0;
1406
dc0b027d 1407 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1408
1409 rcu_read_lock();
1410 deleg_cur = rcu_dereference(nfsi->delegation);
1411 if (deleg_cur == NULL)
1412 goto no_delegation;
1413
1414 spin_lock(&deleg_cur->lock);
17f26b12 1415 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1416 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1417 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1418 goto no_delegation_unlock;
1419
1420 if (delegation == NULL)
1421 delegation = &deleg_cur->stateid;
f597c537 1422 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1423 goto no_delegation_unlock;
1424
b7391f44 1425 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1426 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1427 ret = 1;
1428no_delegation_unlock:
1429 spin_unlock(&deleg_cur->lock);
1430no_delegation:
1431 rcu_read_unlock();
1432
1433 if (!ret && open_stateid != NULL) {
dc0b027d 1434 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1435 ret = 1;
1436 }
4f14c194
TM		 1437 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1438 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1439
1440 return ret;
1441}
1442
39071e6f
TM		 1443static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1444 const nfs4_stateid *stateid)
1445{
1446 struct nfs4_state *state = lsp->ls_state;
1447 bool ret = false;
1448
1449 spin_lock(&state->state_lock);
1450 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1451 goto out_noupdate;
1452 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1453 goto out_noupdate;
1454 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1455 ret = true;
1456out_noupdate:
1457 spin_unlock(&state->state_lock);
1458 return ret;
1459}
34310430 1460
dc0b027d 1461static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1462{
1463 struct nfs_delegation *delegation;
1464
1465 rcu_read_lock();
1466 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1467 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1468 rcu_read_unlock();
1469 return;
1470 }
1471 rcu_read_unlock();
57ec14c5 1472 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1473}
1474
6ee41268 1475static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1476{
1477 struct nfs4_state *state = opendata->state;
1478 struct nfs_inode *nfsi = NFS_I(state->inode);
1479 struct nfs_delegation *delegation;
f448badd 1480 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1481 fmode_t fmode = opendata->o_arg.fmode;
2a606188 1482 enum open_claim_type4 claim = opendata->o_arg.claim;
aac00a8d
TM		 1483 nfs4_stateid stateid;
1484 int ret = -EAGAIN;
1485
aac00a8d 1486 for (;;) {
61beef75 1487 spin_lock(&state->owner->so_lock);
dc0b027d 1488 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1489 update_open_stateflags(state, fmode);
6ee41268 1490 spin_unlock(&state->owner->so_lock);
61beef75 1491 goto out_return_state;
6ee41268 1492 }
61beef75 1493 spin_unlock(&state->owner->so_lock);
34310430
TM		 1494 rcu_read_lock();
1495 delegation = rcu_dereference(nfsi->delegation);
2a606188 1496 if (!can_open_delegated(delegation, fmode, claim)) {
34310430 1497 rcu_read_unlock();
aac00a8d 1498 break;
34310430 1499 }
aac00a8d 1500 /* Save the delegation */
f597c537 1501 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1502 rcu_read_unlock();
fa332941 1503 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1504 if (!opendata->is_recover) {
1505 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1506 if (ret != 0)
1507 goto out;
1508 }
aac00a8d 1509 ret = -EAGAIN;
34310430
TM		 1510
1511 /* Try to update the stateid using the delegation */
dc0b027d 1512 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1513 goto out_return_state;
aac00a8d 1514 }
aac00a8d
TM		 1515out:
1516 return ERR_PTR(ret);
1517out_return_state:
1518 atomic_inc(&state->count);
1519 return state;
1520}
1521
e23008ec
AA		 1522static void
1523nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1524{
1525 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1526 struct nfs_delegation *delegation;
1527 int delegation_flags = 0;
1528
1529 rcu_read_lock();
1530 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1531 if (delegation)
1532 delegation_flags = delegation->flags;
1533 rcu_read_unlock();
72d79ff8
TM		 1534 switch (data->o_arg.claim) {
1535 default:
1536 break;
1537 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1538 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
e23008ec
AA		 1539 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1540 "returning a delegation for "
1541 "OPEN(CLAIM_DELEGATE_CUR)\n",
1542 clp->cl_hostname);
72d79ff8
TM		 1543 return;
1544 }
1545 if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
e23008ec
AA		 1546 nfs_inode_set_delegation(state->inode,
1547 data->owner->so_cred,
1548 &data->o_res);
1549 else
1550 nfs_inode_reclaim_delegation(state->inode,
1551 data->owner->so_cred,
1552 &data->o_res);
1553}
1554
1555/*
1556 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1557 * and update the nfs4_state.
1558 */
1559static struct nfs4_state *
1560_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1561{
1562 struct inode *inode = data->state->inode;
1563 struct nfs4_state *state = data->state;
1564 int ret;
1565
d2bfda2e
WAA		 1566 if (!data->rpc_done) {
1567 if (data->rpc_status) {
1568 ret = data->rpc_status;
1569 goto err;
1570 }
1571 /* cached opens have already been processed */
1572 goto update;
e23008ec
AA		 1573 }
1574
e23008ec
AA		 1575 ret = nfs_refresh_inode(inode, &data->f_attr);
1576 if (ret)
1577 goto err;
1578
1579 if (data->o_res.delegation_type != 0)
1580 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1581update:
e23008ec
AA		 1582 update_open_stateid(state, &data->o_res.stateid, NULL,
1583 data->o_arg.fmode);
d49f042a 1584 atomic_inc(&state->count);
e23008ec
AA		 1585
1586 return state;
1587err:
1588 return ERR_PTR(ret);
1589
1590}
1591
1592static struct nfs4_state *
1593_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1594{
1595 struct inode *inode;
1596 struct nfs4_state *state = NULL;
1b370bc2 1597 int ret;
24ac23ab 1598
aac00a8d 1599 if (!data->rpc_done) {
6ee41268 1600 state = nfs4_try_open_cached(data);
9759b0fb 1601 trace_nfs4_cached_open(data->state);
aac00a8d
TM		 1602 goto out;
1603 }
1604
1b370bc2 1605 ret = -EAGAIN;
24ac23ab 1606 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1607 goto err;
1775fd3e 1608 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1609 ret = PTR_ERR(inode);
03f28e3a 1610 if (IS_ERR(inode))
1b370bc2
TM		 1611 goto err;
1612 ret = -ENOMEM;
24ac23ab
TM		 1613 state = nfs4_get_open_state(inode, data->owner);
1614 if (state == NULL)
1b370bc2 1615 goto err_put_inode;
e23008ec
AA		 1616 if (data->o_res.delegation_type != 0)
1617 nfs4_opendata_check_deleg(data, state);
34310430 1618 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1619 data->o_arg.fmode);
24ac23ab 1620 iput(inode);
aac00a8d 1621out:
7aa262b5 1622 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1623 return state;
1b370bc2
TM		 1624err_put_inode:
1625 iput(inode);
1626err:
1627 return ERR_PTR(ret);
24ac23ab
TM		 1628}
1629
e23008ec
AA		 1630static struct nfs4_state *
1631nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1632{
1633 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1634 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1635 return _nfs4_opendata_to_nfs4_state(data);
1636}
1637
864472e9
TM		 1638static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1639{
1640 struct nfs_inode *nfsi = NFS_I(state->inode);
1641 struct nfs_open_context *ctx;
1642
1643 spin_lock(&state->inode->i_lock);
1644 list_for_each_entry(ctx, &nfsi->open_files, list) {
1645 if (ctx->state != state)
1646 continue;
1647 get_nfs_open_context(ctx);
1648 spin_unlock(&state->inode->i_lock);
1649 return ctx;
1650 }
1651 spin_unlock(&state->inode->i_lock);
1652 return ERR_PTR(-ENOENT);
1653}
1654
4a1c0893
TM		 1655static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1656 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1657{
1658 struct nfs4_opendata *opendata;
1659
4a1c0893 1660 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1661 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1662 if (opendata == NULL)
1663 return ERR_PTR(-ENOMEM);
1664 opendata->state = state;
1665 atomic_inc(&state->count);
1666 return opendata;
1667}
1668
24311f88
TM		 1669static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1670 fmode_t fmode)
864472e9 1671{
2ced46c2 1672 struct nfs4_state *newstate;
864472e9
TM		 1673 int ret;
1674
24311f88 1675 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
39f897fd 1676 return 0;
dc0b027d
TM		 1677 opendata->o_arg.open_flags = 0;
1678 opendata->o_arg.fmode = fmode;
be36e185
TM		 1679 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1680 NFS_SB(opendata->dentry->d_sb),
1681 fmode, 0);
2ced46c2
TM		 1682 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1683 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1684 nfs4_init_opendata_res(opendata);
b257957e 1685 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1686 if (ret != 0)
1687 return ret;
2ced46c2 1688 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1689 if (IS_ERR(newstate))
1690 return PTR_ERR(newstate);
24311f88
TM		 1691 if (newstate != opendata->state)
1692 ret = -ESTALE;
643168c2 1693 nfs4_close_state(newstate, fmode);
24311f88 1694 return ret;
864472e9
TM		 1695}
1696
1697static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1698{
864472e9
TM		 1699 int ret;
1700
4f14c194
TM		 1701 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1702 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1703 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1704 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1705 /* memory barrier prior to reading state->n_* */
2ced46c2 1706 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1707 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9 1708 smp_rmb();
24311f88
TM		 1709 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1710 if (ret != 0)
1711 return ret;
1712 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1713 if (ret != 0)
1714 return ret;
1715 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1716 if (ret != 0)
1717 return ret;
1ac7e2fd
TM		 1718 /*
1719 * We may have performed cached opens for all three recoveries.
1720 * Check if we need to update the current stateid.
1721 */
1722 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1723 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1724 write_seqlock(&state->seqlock);
1ac7e2fd 1725 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1726 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1727 write_sequnlock(&state->seqlock);
1ac7e2fd 1728 }
864472e9
TM		 1729 return 0;
1730}
1731
1da177e4
LT		 1732/*
1733 * OPEN_RECLAIM:
1734 * reclaim state on the server after a reboot.
1da177e4 1735 */
539cd03a 1736static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1737{
1ac7e2fd 1738 struct nfs_delegation *delegation;
864472e9 1739 struct nfs4_opendata *opendata;
dc0b027d 1740 fmode_t delegation_type = 0;
1da177e4
LT		 1741 int status;
1742
4a1c0893
TM		 1743 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1744 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1745 if (IS_ERR(opendata))
1746 return PTR_ERR(opendata);
1ac7e2fd
TM		 1747 rcu_read_lock();
1748 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1749 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1750 delegation_type = delegation->type;
1ac7e2fd 1751 rcu_read_unlock();
864472e9
TM		 1752 opendata->o_arg.u.delegation_type = delegation_type;
1753 status = nfs4_open_recover(opendata, state);
c6d00e63 1754 nfs4_opendata_put(opendata);
1da177e4
LT		 1755 return status;
1756}
1757
539cd03a 1758static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1759{
1760 struct nfs_server *server = NFS_SERVER(state->inode);
1761 struct nfs4_exception exception = { };
1762 int err;
1763 do {
539cd03a 1764 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1765 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1766 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1767 continue;
168667c4 1768 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1769 break;
1770 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1771 } while (exception.retry);
1772 return err;
1773}
1774
864472e9
TM		 1775static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1776{
1777 struct nfs_open_context *ctx;
1778 int ret;
1779
1780 ctx = nfs4_state_find_open_context(state);
1781 if (IS_ERR(ctx))
91876b13 1782 return -EAGAIN;
539cd03a 1783 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1784 put_nfs_open_context(ctx);
1785 return ret;
1786}
1787
db4f2e63 1788static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1789{
be76b5b6
TM		 1790 switch (err) {
1791 default:
1792 printk(KERN_ERR "NFS: %s: unhandled error "
1793 "%d.\n", __func__, err);
1794 case 0:
1795 case -ENOENT:
8eee52af 1796 case -EAGAIN:
be76b5b6
TM		 1797 case -ESTALE:
1798 break;
1799 case -NFS4ERR_BADSESSION:
1800 case -NFS4ERR_BADSLOT:
1801 case -NFS4ERR_BAD_HIGH_SLOT:
1802 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1803 case -NFS4ERR_DEADSESSION:
1804 set_bit(NFS_DELEGATED_STATE, &state->flags);
1805 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1806 return -EAGAIN;
1807 case -NFS4ERR_STALE_CLIENTID:
1808 case -NFS4ERR_STALE_STATEID:
1809 set_bit(NFS_DELEGATED_STATE, &state->flags);
1810 case -NFS4ERR_EXPIRED:
1811 /* Don't recall a delegation if it was lost */
1812 nfs4_schedule_lease_recovery(server->nfs_client);
1813 return -EAGAIN;
352297b9
CL		 1814 case -NFS4ERR_MOVED:
1815 nfs4_schedule_migration_recovery(server);
1816 return -EAGAIN;
8ef2f8d4
CL		 1817 case -NFS4ERR_LEASE_MOVED:
1818 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1819 return -EAGAIN;
be76b5b6
TM		 1820 case -NFS4ERR_DELEG_REVOKED:
1821 case -NFS4ERR_ADMIN_REVOKED:
1822 case -NFS4ERR_BAD_STATEID:
db4f2e63 1823 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1824 nfs_inode_find_state_and_recover(state->inode,
1825 stateid);
1826 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1827 return -EAGAIN;
be76b5b6
TM		 1828 case -NFS4ERR_DELAY:
1829 case -NFS4ERR_GRACE:
1830 set_bit(NFS_DELEGATED_STATE, &state->flags);
1831 ssleep(1);
1832 return -EAGAIN;
db4f2e63
TM		 1833 case -ENOMEM:
1834 case -NFS4ERR_DENIED:
1835 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1836 return 0;
be76b5b6 1837 }
1da177e4
LT		 1838 return err;
1839}
1840
24311f88
TM		 1841int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
1842 struct nfs4_state *state, const nfs4_stateid *stateid,
1843 fmode_t type)
db4f2e63
TM		 1844{
1845 struct nfs_server *server = NFS_SERVER(state->inode);
1846 struct nfs4_opendata *opendata;
24311f88 1847 int err = 0;
db4f2e63
TM		 1848
1849 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1850 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1851 if (IS_ERR(opendata))
1852 return PTR_ERR(opendata);
1853 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
5e99b532
JL		 1854 write_seqlock(&state->seqlock);
1855 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1856 write_sequnlock(&state->seqlock);
24311f88
TM		 1857 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1858 switch (type & (FMODE_READ|FMODE_WRITE)) {
1859 case FMODE_READ|FMODE_WRITE:
1860 case FMODE_WRITE:
1861 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1862 if (err)
1863 break;
1864 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1865 if (err)
1866 break;
1867 case FMODE_READ:
1868 err = nfs4_open_recover_helper(opendata, FMODE_READ);
1869 }
db4f2e63
TM		 1870 nfs4_opendata_put(opendata);
1871 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1872}
1873
be05c860
CL		 1874static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1875{
1876 struct nfs4_opendata *data = calldata;
1877
cb04ad2a
PT		 1878 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1879 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 1880}
1881
cdd4e68b
TM		 1882static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1883{
1884 struct nfs4_opendata *data = calldata;
1885
17ead6c8 1886 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1887
cdd4e68b 1888 data->rpc_status = task->tk_status;
26e976a8 1889 if (data->rpc_status == 0) {
f597c537 1890 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1891 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1892 renew_lease(data->o_res.server, data->timestamp);
3e309914 1893 data->rpc_done = 1;
26e976a8 1894 }
cdd4e68b
TM		 1895}
1896
1897static void nfs4_open_confirm_release(void *calldata)
1898{
1899 struct nfs4_opendata *data = calldata;
1900 struct nfs4_state *state = NULL;
1901
1902 /* If this request hasn't been cancelled, do nothing */
1903 if (data->cancelled == 0)
1904 goto out_free;
1905 /* In case of error, no cleanup! */
3e309914 1906 if (!data->rpc_done)
cdd4e68b 1907 goto out_free;
cdd4e68b 1908 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1909 if (!IS_ERR(state))
643168c2 1910 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1911out_free:
c6d00e63 1912 nfs4_opendata_put(data);
cdd4e68b
TM		 1913}
1914
1915static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1916 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1917 .rpc_call_done = nfs4_open_confirm_done,
1918 .rpc_release = nfs4_open_confirm_release,
1919};
1920
1921/*
1922 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1923 */
1924static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1925{
2b0143b5 1926 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 1927 struct rpc_task *task;
5138fde0
TM		 1928 struct rpc_message msg = {
1929 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1930 .rpc_argp = &data->c_arg,
1931 .rpc_resp = &data->c_res,
1932 .rpc_cred = data->owner->so_cred,
1933 };
c970aa85
TM		 1934 struct rpc_task_setup task_setup_data = {
1935 .rpc_client = server->client,
5138fde0 1936 .rpc_message = &msg,
c970aa85
TM		 1937 .callback_ops = &nfs4_open_confirm_ops,
1938 .callback_data = data,
101070ca 1939 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1940 .flags = RPC_TASK_ASYNC,
1941 };
1da177e4
LT		 1942 int status;
1943
17ead6c8 1944 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1945 kref_get(&data->kref);
3e309914
TM		 1946 data->rpc_done = 0;
1947 data->rpc_status = 0;
5138fde0 1948 data->timestamp = jiffies;
e92c1e0d
BC		 1949 if (data->is_recover)
1950 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
c970aa85 1951 task = rpc_run_task(&task_setup_data);
7a1218a2 1952 if (IS_ERR(task))
cdd4e68b 1953 return PTR_ERR(task);
cdd4e68b
TM		 1954 status = nfs4_wait_for_completion_rpc_task(task);
1955 if (status != 0) {
1956 data->cancelled = 1;
1957 smp_wmb();
1958 } else
1959 status = data->rpc_status;
e6b3c4db 1960 rpc_put_task(task);
1da177e4
LT		 1961 return status;
1962}
1963
24ac23ab 1964static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1965{
24ac23ab
TM		 1966 struct nfs4_opendata *data = calldata;
1967 struct nfs4_state_owner *sp = data->owner;
549b19cc 1968 struct nfs_client *clp = sp->so_server->nfs_client;
2a606188 1969 enum open_claim_type4 claim = data->o_arg.claim;
5138fde0 1970
24ac23ab 1971 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1972 goto out_wait;
aac00a8d
TM		 1973 /*
1974 * Check if we still need to send an OPEN call, or if we can use
1975 * a delegation instead.
1976 */
1977 if (data->state != NULL) {
1978 struct nfs_delegation *delegation;
1979
dc0b027d 1980 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1981 goto out_no_action;
aac00a8d
TM		 1982 rcu_read_lock();
1983 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2a606188 1984 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
652f89f6 1985 goto unlock_no_action;
aac00a8d
TM		 1986 rcu_read_unlock();
1987 }
95b72eb0 1988 /* Update client id. */
549b19cc 1989 data->o_arg.clientid = clp->cl_clientid;
2a606188
TM		 1990 switch (claim) {
1991 default:
1992 break;
8188df17
TM		 1993 case NFS4_OPEN_CLAIM_PREVIOUS:
1994 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1995 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1996 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1997 case NFS4_OPEN_CLAIM_FH:
1998 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1999 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
2000 }
26e976a8 2001 data->timestamp = jiffies;
035168ab 2002 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 2003 &data->o_arg.seq_args,
2240a9e2
TM		 2004 &data->o_res.seq_res,
2005 task) != 0)
2006 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 2007
2008 /* Set the create mode (note dependency on the session type) */
2009 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2010 if (data->o_arg.open_flags & O_EXCL) {
2011 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2012 if (nfs4_has_persistent_session(clp))
2013 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2014 else if (clp->cl_mvops->minor_version > 0)
2015 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2016 }
6ee41268 2017 return;
652f89f6 2018unlock_no_action:
9759b0fb 2019 trace_nfs4_cached_open(data->state);
652f89f6 2020 rcu_read_unlock();
6ee41268
TM		 2021out_no_action:
2022 task->tk_action = NULL;
c8da19b9 2023out_wait:
b75ad4cd 2024 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 2025}
2026
24ac23ab
TM		 2027static void nfs4_open_done(struct rpc_task *task, void *calldata)
2028{
2029 struct nfs4_opendata *data = calldata;
1da177e4 2030
24ac23ab 2031 data->rpc_status = task->tk_status;
d898528c 2032
14516c3a
TM		 2033 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
2034 return;
d898528c 2035
24ac23ab 2036 if (task->tk_status == 0) {
807d66d8
TM		 2037 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2038 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 2039 case S_IFREG:
2040 break;
2041 case S_IFLNK:
24ac23ab 2042 data->rpc_status = -ELOOP;
6f926b5b
TM		 2043 break;
2044 case S_IFDIR:
24ac23ab 2045 data->rpc_status = -EISDIR;
6f926b5b
TM		 2046 break;
2047 default:
24ac23ab 2048 data->rpc_status = -ENOTDIR;
807d66d8 2049 }
6f926b5b 2050 }
26e976a8 2051 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 2052 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2053 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 2054 }
3e309914 2055 data->rpc_done = 1;
24ac23ab 2056}
6f926b5b 2057
24ac23ab
TM		 2058static void nfs4_open_release(void *calldata)
2059{
2060 struct nfs4_opendata *data = calldata;
2061 struct nfs4_state *state = NULL;
2062
2063 /* If this request hasn't been cancelled, do nothing */
2064 if (data->cancelled == 0)
2065 goto out_free;
2066 /* In case of error, no cleanup! */
3e309914 2067 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 2068 goto out_free;
2069 /* In case we need an open_confirm, no cleanup! */
2070 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2071 goto out_free;
24ac23ab 2072 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2073 if (!IS_ERR(state))
643168c2 2074 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 2075out_free:
c6d00e63 2076 nfs4_opendata_put(data);
24ac23ab
TM		 2077}
2078
2079static const struct rpc_call_ops nfs4_open_ops = {
2080 .rpc_call_prepare = nfs4_open_prepare,
2081 .rpc_call_done = nfs4_open_done,
2082 .rpc_release = nfs4_open_release,
2083};
2084
b257957e 2085static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab 2086{
2b0143b5 2087 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 2088 struct nfs_server *server = NFS_SERVER(dir);
2089 struct nfs_openargs *o_arg = &data->o_arg;
2090 struct nfs_openres *o_res = &data->o_res;
2091 struct rpc_task *task;
5138fde0
TM		 2092 struct rpc_message msg = {
2093 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2094 .rpc_argp = o_arg,
2095 .rpc_resp = o_res,
2096 .rpc_cred = data->owner->so_cred,
2097 };
c970aa85
TM		 2098 struct rpc_task_setup task_setup_data = {
2099 .rpc_client = server->client,
5138fde0 2100 .rpc_message = &msg,
c970aa85
TM		 2101 .callback_ops = &nfs4_open_ops,
2102 .callback_data = data,
101070ca 2103 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2104 .flags = RPC_TASK_ASYNC,
2105 };
24ac23ab
TM		 2106 int status;
2107
a9c92d6b 2108 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 2109 kref_get(&data->kref);
3e309914
TM		 2110 data->rpc_done = 0;
2111 data->rpc_status = 0;
2ced46c2 2112 data->cancelled = 0;
bdeca1b7
TM		 2113 data->is_recover = 0;
2114 if (isrecover) {
8fe72bac 2115 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 2116 data->is_recover = 1;
2117 }
c970aa85 2118 task = rpc_run_task(&task_setup_data);
b257957e
AB		 2119 if (IS_ERR(task))
2120 return PTR_ERR(task);
2121 status = nfs4_wait_for_completion_rpc_task(task);
2122 if (status != 0) {
2123 data->cancelled = 1;
2124 smp_wmb();
2125 } else
2126 status = data->rpc_status;
2127 rpc_put_task(task);
2128
2129 return status;
2130}
2131
2132static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2133{
2b0143b5 2134 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2135 struct nfs_openres *o_res = &data->o_res;
2136 int status;
2137
2138 status = nfs4_run_open_task(data, 1);
2139 if (status != 0 || !data->rpc_done)
2140 return status;
2141
6926afd1
TM		 2142 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2143
b257957e
AB		 2144 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2145 status = _nfs4_proc_open_confirm(data);
2146 if (status != 0)
2147 return status;
2148 }
2149
2150 return status;
2151}
2152
f3792d63
TM		 2153/*
2154 * Additional permission checks in order to distinguish between an
2155 * open for read, and an open for execute. This works around the
2156 * fact that NFSv4 OPEN treats read and execute permissions as being
2157 * the same.
2158 * Note that in the non-execute case, we want to turn off permission
2159 * checking if we just created a new file (POSIX open() semantics).
2160 */
6168f62c
WAA		 2161static int nfs4_opendata_access(struct rpc_cred *cred,
2162 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2163 struct nfs4_state *state, fmode_t fmode,
2164 int openflags)
6168f62c
WAA		 2165{
2166 struct nfs_access_entry cache;
2167 u32 mask;
2168
2169 /* access call failed or for some reason the server doesn't
2170 * support any access modes -- defer access call until later */
2171 if (opendata->o_res.access_supported == 0)
2172 return 0;
2173
2174 mask = 0;
f3792d63
TM		 2175 /*
2176 * Use openflags to check for exec, because fmode won't
2177 * always have FMODE_EXEC set when file open for exec.
2178 */
f8d9a897
WAA		 2179 if (openflags & __FMODE_EXEC) {
2180 /* ONLY check for exec rights */
2181 mask = MAY_EXEC;
f3792d63 2182 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2183 mask = MAY_READ;
6168f62c
WAA		 2184
2185 cache.cred = cred;
2186 cache.jiffies = jiffies;
2187 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2188 nfs_access_add_cache(state->inode, &cache);
2189
bbd3a8ee 2190 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2191 return 0;
2192
2193 /* even though OPEN succeeded, access is denied. Close the file */
2194 nfs4_close_state(state, fmode);
998f40b5 2195 return -EACCES;
6168f62c
WAA		 2196}
2197
b257957e
AB		 2198/*
2199 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2200 */
2201static int _nfs4_proc_open(struct nfs4_opendata *data)
2202{
2b0143b5 2203 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2204 struct nfs_server *server = NFS_SERVER(dir);
2205 struct nfs_openargs *o_arg = &data->o_arg;
2206 struct nfs_openres *o_res = &data->o_res;
2207 int status;
2208
2209 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2210 if (!data->rpc_done)
2211 return status;
2212 if (status != 0) {
2213 if (status == -NFS4ERR_BADNAME &&
2214 !(o_arg->open_flags & O_CREAT))
2215 return -ENOENT;
24ac23ab 2216 return status;
08ef7bd3 2217 }
24ac23ab 2218
6926afd1
TM		 2219 nfs_fattr_map_and_free_names(server, &data->f_attr);
2220
5bc2afc2 2221 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2222 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2223 if (o_arg->open_flags & O_EXCL)
2224 data->file_created = 1;
2225 else if (o_res->cinfo.before != o_res->cinfo.after)
2226 data->file_created = 1;
2227 }
0df5dd4a
TM		 2228 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2229 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2230 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2231 status = _nfs4_proc_open_confirm(data);
1da177e4 2232 if (status != 0)
24ac23ab 2233 return status;
1da177e4
LT		 2234 }
2235 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2236 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2237 return 0;
1da177e4
LT		 2238}
2239
d83217c1
AA		 2240static int nfs4_recover_expired_lease(struct nfs_server *server)
2241{
2242 return nfs4_client_recover_expired_lease(server->nfs_client);
2243}
2244
1da177e4
LT		 2245/*
2246 * OPEN_EXPIRED:
2247 * reclaim state on the server after a network partition.
2248 * Assumes caller holds the appropriate lock
2249 */
539cd03a 2250static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2251{
e56e0b78 2252 struct nfs4_opendata *opendata;
864472e9 2253 int ret;
1da177e4 2254
4a1c0893 2255 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2256 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2257 if (IS_ERR(opendata))
2258 return PTR_ERR(opendata);
864472e9 2259 ret = nfs4_open_recover(opendata, state);
35d05778 2260 if (ret == -ESTALE)
3d4ff43d 2261 d_drop(ctx->dentry);
c6d00e63 2262 nfs4_opendata_put(opendata);
864472e9 2263 return ret;
1da177e4
LT		 2264}
2265
a9ed2e25 2266static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2267{
539cd03a 2268 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2269 struct nfs4_exception exception = { };
2270 int err;
2271
2272 do {
539cd03a 2273 err = _nfs4_open_expired(ctx, state);
42113a75 2274 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2275 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2276 continue;
a9ed2e25
TM		 2277 switch (err) {
2278 default:
2279 goto out;
2280 case -NFS4ERR_GRACE:
2281 case -NFS4ERR_DELAY:
2282 nfs4_handle_exception(server, err, &exception);
2283 err = 0;
2284 }
202b50dc 2285 } while (exception.retry);
a9ed2e25 2286out:
202b50dc
TM		 2287 return err;
2288}
2289
1da177e4
LT		 2290static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2291{
1da177e4 2292 struct nfs_open_context *ctx;
864472e9 2293 int ret;
1da177e4 2294
864472e9
TM		 2295 ctx = nfs4_state_find_open_context(state);
2296 if (IS_ERR(ctx))
91876b13 2297 return -EAGAIN;
539cd03a 2298 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2299 put_nfs_open_context(ctx);
2300 return ret;
1da177e4
LT		 2301}
2302
4dfd4f7a
TM		 2303static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2304{
2305 nfs_remove_bad_delegation(state->inode);
2306 write_seqlock(&state->seqlock);
2307 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2308 write_sequnlock(&state->seqlock);
2309 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2310}
2311
2312static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2313{
2314 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2315 nfs_finish_clear_delegation_stateid(state);
2316}
2317
2318static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2319{
2320 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2321 nfs40_clear_delegation_stateid(state);
2322 return nfs4_open_expired(sp, state);
2323}
2324
f062eb6c 2325#if defined(CONFIG_NFS_V4_1)
0c116cad 2326static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2327{
f062eb6c 2328 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2329 nfs4_stateid stateid;
ab7cb0df 2330 struct nfs_delegation *delegation;
0c116cad
TM		 2331 struct rpc_cred *cred;
2332 int status;
3e60ffdd 2333
ab7cb0df
TM		 2334 /* Get the delegation credential for use by test/free_stateid */
2335 rcu_read_lock();
2336 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2337 if (delegation == NULL) {
ab7cb0df 2338 rcu_read_unlock();
0c116cad
TM		 2339 return;
2340 }
2341
2342 nfs4_stateid_copy(&stateid, &delegation->stateid);
2343 cred = get_rpccred(delegation->cred);
2344 rcu_read_unlock();
2345 status = nfs41_test_stateid(server, &stateid, cred);
2346 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df 2347
3e60ffdd
CL		 2348 if (status != NFS_OK) {
2349 /* Free the stateid unless the server explicitly
2350 * informs us the stateid is unrecognized. */
2351 if (status != -NFS4ERR_BAD_STATEID)
0c116cad
TM		 2352 nfs41_free_stateid(server, &stateid, cred);
2353 nfs_finish_clear_delegation_stateid(state);
3e60ffdd 2354 }
ab7cb0df 2355
0c116cad 2356 put_rpccred(cred);
3e60ffdd
CL		 2357}
2358
2359/**
2360 * nfs41_check_open_stateid - possibly free an open stateid
2361 *
2362 * @state: NFSv4 state for an inode
2363 *
2364 * Returns NFS_OK if recovery for this stateid is now finished.
2365 * Otherwise a negative NFS4ERR value is returned.
2366 */
2367static int nfs41_check_open_stateid(struct nfs4_state *state)
2368{
2369 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2370 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2371 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2372 int status;
2373
2374 /* If a state reset has been done, test_stateid is unneeded */
2375 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2376 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2377 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2378 return -NFS4ERR_BAD_STATEID;
2379
ab7cb0df 2380 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2381 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2382 if (status != NFS_OK) {
2383 /* Free the stateid unless the server explicitly
2384 * informs us the stateid is unrecognized. */
2385 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2386 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2387
2388 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2389 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2390 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2391 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2392 }
2393 return status;
2394}
2395
2396static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2397{
eb64cf96 2398 int status;
b01dd1d8 2399
0c116cad 2400 nfs41_check_delegation_stateid(state);
3e60ffdd 2401 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2402 if (status != NFS_OK)
2403 status = nfs4_open_expired(sp, state);
2404 return status;
f062eb6c
BS		 2405}
2406#endif
2407
aa53ed54
JL		 2408/*
2409 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2410 * fields corresponding to attributes that were used to store the verifier.
2411 * Make sure we clobber those fields in the later setattr call
2412 */
5334c5bd
KM		 2413static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2414 struct iattr *sattr, struct nfs4_label **label)
aa53ed54 2415{
5334c5bd
KM		 2416 const u32 *attrset = opendata->o_res.attrset;
2417
2418 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
aa53ed54
JL		 2419 !(sattr->ia_valid & ATTR_ATIME_SET))
2420 sattr->ia_valid |= ATTR_ATIME;
2421
5334c5bd 2422 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
aa53ed54
JL		 2423 !(sattr->ia_valid & ATTR_MTIME_SET))
2424 sattr->ia_valid |= ATTR_MTIME;
5334c5bd
KM		 2425
2426 /* Except MODE, it seems harmless of setting twice. */
2427 if ((attrset[1] & FATTR4_WORD1_MODE))
2428 sattr->ia_valid &= ~ATTR_MODE;
2429
2430 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2431 *label = NULL;
aa53ed54
JL		 2432}
2433
c21443c2
TM		 2434static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2435 fmode_t fmode,
2436 int flags,
3efb9722 2437 struct nfs_open_context *ctx)
c21443c2
TM		 2438{
2439 struct nfs4_state_owner *sp = opendata->owner;
2440 struct nfs_server *server = sp->so_server;
275bb307 2441 struct dentry *dentry;
c21443c2
TM		 2442 struct nfs4_state *state;
2443 unsigned int seq;
2444 int ret;
2445
2446 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2447
2448 ret = _nfs4_proc_open(opendata);
dca78001 2449 if (ret != 0)
c21443c2
TM		 2450 goto out;
2451
2452 state = nfs4_opendata_to_nfs4_state(opendata);
2453 ret = PTR_ERR(state);
2454 if (IS_ERR(state))
2455 goto out;
2456 if (server->caps & NFS_CAP_POSIX_LOCK)
2457 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2458
275bb307 2459 dentry = opendata->dentry;
2b0143b5 2460 if (d_really_is_negative(dentry)) {
275bb307
TM		 2461 /* FIXME: Is this d_drop() ever needed? */
2462 d_drop(dentry);
2463 dentry = d_add_unique(dentry, igrab(state->inode));
2464 if (dentry == NULL) {
2465 dentry = opendata->dentry;
2466 } else if (dentry != ctx->dentry) {
2467 dput(ctx->dentry);
2468 ctx->dentry = dget(dentry);
2469 }
2470 nfs_set_verifier(dentry,
2b0143b5 2471 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2472 }
2473
c21443c2
TM		 2474 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2475 if (ret != 0)
2476 goto out;
2477
3efb9722 2478 ctx->state = state;
2b0143b5 2479 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2480 nfs_inode_attach_open_context(ctx);
2481 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2482 nfs4_schedule_stateid_recovery(server, state);
2483 }
c21443c2
TM		 2484out:
2485 return ret;
2486}
2487
1da177e4 2488/*
24ac23ab 2489 * Returns a referenced nfs4_state
1da177e4 2490 */
82be417a 2491static int _nfs4_do_open(struct inode *dir,
4197a055 2492 struct nfs_open_context *ctx,
82be417a
AA		 2493 int flags,
2494 struct iattr *sattr,
5bc2afc2
TM		 2495 struct nfs4_label *label,
2496 int *opened)
1da177e4
LT		 2497{
2498 struct nfs4_state_owner *sp;
2499 struct nfs4_state *state = NULL;
2500 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2501 struct nfs4_opendata *opendata;
4197a055
TM		 2502 struct dentry *dentry = ctx->dentry;
2503 struct rpc_cred *cred = ctx->cred;
2504 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2505 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2506 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2507 struct nfs4_label *olabel = NULL;
aac00a8d 2508 int status;
1da177e4
LT		 2509
2510 /* Protect against reboot recovery conflicts */
1da177e4 2511 status = -ENOMEM;
d1e284d5
TM		 2512 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2513 if (sp == NULL) {
1da177e4
LT		 2514 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2515 goto out_err;
2516 }
58d9714a
TM		 2517 status = nfs4_recover_expired_lease(server);
2518 if (status != 0)
b4454fe1 2519 goto err_put_state_owner;
2b0143b5
DH		 2520 if (d_really_is_positive(dentry))
2521 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2522 status = -ENOMEM;
2b0143b5 2523 if (d_really_is_positive(dentry))
49f9a0fa 2524 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2525 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2526 label, claim, GFP_KERNEL);
e56e0b78 2527 if (opendata == NULL)
95d35cb4 2528 goto err_put_state_owner;
1da177e4 2529
14c43f76
DQ		 2530 if (label) {
2531 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2532 if (IS_ERR(olabel)) {
2533 status = PTR_ERR(olabel);
2534 goto err_opendata_put;
2535 }
2536 }
2537
e911b815
TM		 2538 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2539 if (!opendata->f_attr.mdsthreshold) {
2540 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2541 if (!opendata->f_attr.mdsthreshold)
2542 goto err_free_label;
2543 }
1549210f 2544 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2545 }
2b0143b5
DH		 2546 if (d_really_is_positive(dentry))
2547 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2548
3efb9722 2549 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2550 if (status != 0)
14c43f76 2551 goto err_free_label;
3efb9722 2552 state = ctx->state;
6168f62c 2553
efcbc04e 2554 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 2555 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
5334c5bd 2556 nfs4_exclusive_attrset(opendata, sattr, &label);
0ab64e0e
TM		 2557
2558 nfs_fattr_init(opendata->o_res.f_attr);
2559 status = nfs4_do_setattr(state->inode, cred,
2560 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2561 state, label, olabel);
2562 if (status == 0) {
f044636d
TM		 2563 nfs_setattr_update_inode(state->inode, sattr,
2564 opendata->o_res.f_attr);
aa9c2669 2565 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2566 }
0ab64e0e 2567 }
c5c3fb5f 2568 if (opened && opendata->file_created)
5bc2afc2 2569 *opened |= FILE_CREATED;
82be417a 2570
e911b815 2571 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2572 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2573 opendata->f_attr.mdsthreshold = NULL;
2574 }
82be417a 2575
14c43f76
DQ		 2576 nfs4_label_free(olabel);
2577
c6d00e63 2578 nfs4_opendata_put(opendata);
1da177e4 2579 nfs4_put_state_owner(sp);
1da177e4 2580 return 0;
14c43f76
DQ		 2581err_free_label:
2582 nfs4_label_free(olabel);
c6d00e63
TM		 2583err_opendata_put:
2584 nfs4_opendata_put(opendata);
e56e0b78
TM		 2585err_put_state_owner:
2586 nfs4_put_state_owner(sp);
1da177e4 2587out_err:
1da177e4
LT		 2588 return status;
2589}
2590
2591
82be417a 2592static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2593 struct nfs_open_context *ctx,
82be417a
AA		 2594 int flags,
2595 struct iattr *sattr,
5bc2afc2
TM		 2596 struct nfs4_label *label,
2597 int *opened)
1da177e4 2598{
49f9a0fa 2599 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2600 struct nfs4_exception exception = { };
2601 struct nfs4_state *res;
2602 int status;
2603
2604 do {
5bc2afc2 2605 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2606 res = ctx->state;
42113a75 2607 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2608 if (status == 0)
2609 break;
2610 /* NOTE: BAD_SEQID means the server and client disagree about the
2611 * book-keeping w.r.t. state-changing operations
2612 * (OPEN/CLOSE/LOCK/LOCKU...)
2613 * It is actually a sign of a bug on the client or on the server.
2614 *
2615 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2616 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2617 * have unhashed the old state_owner for us, and that we can
2618 * therefore safely retry using a new one. We should still warn
2619 * the user though...
2620 */
2621 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2622 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2623 " returned a bad sequence-id error!\n",
2624 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2625 exception.retry = 1;
2626 continue;
2627 }
550f5747
TM		 2628 /*
2629 * BAD_STATEID on OPEN means that the server cancelled our
2630 * state before it received the OPEN_CONFIRM.
2631 * Recover by retrying the request as per the discussion
2632 * on Page 181 of RFC3530.
2633 */
2634 if (status == -NFS4ERR_BAD_STATEID) {
2635 exception.retry = 1;
2636 continue;
2637 }
aac00a8d
TM		 2638 if (status == -EAGAIN) {
2639 /* We must have found a delegation */
2640 exception.retry = 1;
2641 continue;
2642 }
49f9a0fa
TM		 2643 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2644 continue;
2645 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2646 status, &exception));
2647 } while (exception.retry);
2648 return res;
2649}
2650
659bfcd6
TM		 2651static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2652 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2653 struct nfs4_state *state, struct nfs4_label *ilabel,
2654 struct nfs4_label *olabel)
1da177e4 2655{
3e4f6290 2656 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2657 struct nfs_setattrargs arg = {
3e4f6290 2658 .fh = NFS_FH(inode),
1da177e4
LT		 2659 .iap = sattr,
2660 .server = server,
2661 .bitmask = server->attr_bitmask,
1775fd3e 2662 .label = ilabel,
1da177e4
LT		 2663 };
2664 struct nfs_setattrres res = {
2665 .fattr = fattr,
1775fd3e 2666 .label = olabel,
1da177e4
LT		 2667 .server = server,
2668 };
2669 struct rpc_message msg = {
659bfcd6
TM		 2670 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2671 .rpc_argp = &arg,
2672 .rpc_resp = &res,
2673 .rpc_cred = cred,
1da177e4 2674 };
26e976a8 2675 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2676 fmode_t fmode;
2677 bool truncate;
65e4308d 2678 int status;
1da177e4 2679
aa9c2669
DQ		 2680 arg.bitmask = nfs4_bitmask(server, ilabel);
2681 if (ilabel)
2682 arg.bitmask = nfs4_bitmask(server, olabel);
2683
0e574af1 2684 nfs_fattr_init(fattr);
1da177e4 2685
ee3ae84e
TM		 2686 /* Servers should only apply open mode checks for file size changes */
2687 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2688 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2689
2690 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2691 /* Use that stateid */
0418dae1 2692 } else if (truncate && state != NULL) {
2a369153
TM		 2693 struct nfs_lockowner lockowner = {
2694 .l_owner = current->files,
2695 .l_pid = current->tgid,
2696 };
0418dae1
TM		 2697 if (!nfs4_valid_open_stateid(state))
2698 return -EBADF;
2699 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2700 &lockowner) == -EIO)
2701 return -EBADF;
08e9eac4 2702 } else
f597c537 2703 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2704
7c513058 2705 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2706 if (status == 0 && state != NULL)
2707 renew_lease(server, timestamp);
48c9579a 2708 trace_nfs4_setattr(inode, &arg.stateid, status);
65e4308d 2709 return status;
1da177e4
LT		 2710}
2711
659bfcd6
TM		 2712static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2713 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2714 struct nfs4_state *state, struct nfs4_label *ilabel,
2715 struct nfs4_label *olabel)
1da177e4 2716{
3e4f6290 2717 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2718 struct nfs4_exception exception = {
2719 .state = state,
3114ea7a 2720 .inode = inode,
a1d0b5ee 2721 };
1da177e4
LT		 2722 int err;
2723 do {
1775fd3e 2724 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
451146be
TM		 2725 switch (err) {
2726 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2727 if (!(sattr->ia_valid & ATTR_SIZE)) {
2728 pr_warn_once("NFSv4: server %s is incorrectly "
2729 "applying open mode checks to "
2730 "a SETATTR that is not "
2731 "changing file size.\n",
2732 server->nfs_client->cl_hostname);
2733 }
451146be
TM		 2734 if (state && !(state->state & FMODE_WRITE)) {
2735 err = -EBADF;
2736 if (sattr->ia_valid & ATTR_OPEN)
2737 err = -EACCES;
2738 goto out;
2739 }
2740 }
2741 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2742 } while (exception.retry);
451146be 2743out:
1da177e4
LT		 2744 return err;
2745}
2746
500d701f
PT		 2747static bool
2748nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
2749{
2750 if (inode == NULL || !nfs_have_layout(inode))
2751 return false;
2752
2753 return pnfs_wait_on_layoutreturn(inode, task);
2754}
2755
1da177e4
LT		 2756struct nfs4_closedata {
2757 struct inode *inode;
2758 struct nfs4_state *state;
2759 struct nfs_closeargs arg;
2760 struct nfs_closeres res;
516a6af6 2761 struct nfs_fattr fattr;
26e976a8 2762 unsigned long timestamp;
f7e8917a
FI		 2763 bool roc;
2764 u32 roc_barrier;
1da177e4
LT		 2765};
2766
963d8fe5 2767static void nfs4_free_closedata(void *data)
9512135d 2768{
963d8fe5
TM		 2769 struct nfs4_closedata *calldata = data;
2770 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2771 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2772
f7e8917a
FI		 2773 if (calldata->roc)
2774 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2775 nfs4_put_open_state(calldata->state);
2776 nfs_free_seqid(calldata->arg.seqid);
9512135d 2777 nfs4_put_state_owner(sp);
322b2b90 2778 nfs_sb_deactive(sb);
9512135d
TM		 2779 kfree(calldata);
2780}
2781
963d8fe5 2782static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2783{
963d8fe5 2784 struct nfs4_closedata *calldata = data;
1da177e4 2785 struct nfs4_state *state = calldata->state;
1da177e4 2786 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2787 nfs4_stateid *res_stateid = NULL;
1da177e4 2788
a3ca5651 2789 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2790 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2791 return;
42113a75 2792 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2793 /* hmm. we are done with the inode, and in the process of freeing
2794 * the state_owner. we keep this around to process errors
2795 */
1da177e4
LT		 2796 switch (task->tk_status) {
2797 case 0:
412f6c4c 2798 res_stateid = &calldata->res.stateid;
3c13cb5b 2799 if (calldata->roc)
f7e8917a
FI		 2800 pnfs_roc_set_barrier(state->inode,
2801 calldata->roc_barrier);
26e976a8 2802 renew_lease(server, calldata->timestamp);
412f6c4c 2803 break;
69794ad7 2804 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2805 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2806 case -NFS4ERR_OLD_STATEID:
2807 case -NFS4ERR_BAD_STATEID:
1da177e4 2808 case -NFS4ERR_EXPIRED:
566fcec6 2809 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 2810 &state->open_stateid)) {
566fcec6
TM		 2811 rpc_restart_call_prepare(task);
2812 goto out_release;
2813 }
dc0b027d 2814 if (calldata->arg.fmode == 0)
9e33bed5 2815 break;
1da177e4 2816 default:
8478eaa1 2817 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 2818 rpc_restart_call_prepare(task);
69794ad7
TM		 2819 goto out_release;
2820 }
1da177e4 2821 }
4a1e2feb
TM		 2822 nfs_clear_open_stateid(state, &calldata->arg.stateid,
2823 res_stateid, calldata->arg.fmode);
69794ad7 2824out_release:
72211dbe 2825 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2826 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2827 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2828}
2829
4ce70ada 2830static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2831{
4ce70ada 2832 struct nfs4_closedata *calldata = data;
9512135d 2833 struct nfs4_state *state = calldata->state;
7fdab069 2834 struct inode *inode = calldata->inode;
aee7af35 2835 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2836 int call_close = 0;
9512135d 2837
a3ca5651 2838 dprintk("%s: begin!\n", __func__);
963d8fe5 2839 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2840 goto out_wait;
003707c7 2841
88069f77 2842 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2843 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2844 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2845 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2846 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 2847 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 2848 /* Calculate the change in open mode */
cd9288ff 2849 calldata->arg.fmode = 0;
e7616923 2850 if (state->n_rdwr == 0) {
cd9288ff
TM		 2851 if (state->n_rdonly == 0)
2852 call_close |= is_rdonly;
2853 else if (is_rdonly)
2854 calldata->arg.fmode |= FMODE_READ;
2855 if (state->n_wronly == 0)
2856 call_close |= is_wronly;
2857 else if (is_wronly)
2858 calldata->arg.fmode |= FMODE_WRITE;
2859 } else if (is_rdwr)
2860 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2861
2862 if (calldata->arg.fmode == 0)
2863 call_close |= is_rdwr;
2864
5d422301
TM		 2865 if (!nfs4_valid_open_stateid(state))
2866 call_close = 0;
4cecb76f 2867 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2868
2869 if (!call_close) {
963d8fe5 2870 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2871 goto out_no_action;
9512135d 2872 }
88069f77 2873
500d701f
PT		 2874 if (nfs4_wait_on_layoutreturn(inode, task)) {
2875 nfs_release_seqid(calldata->arg.seqid);
2876 goto out_wait;
2877 }
2878
3c13cb5b 2879 if (calldata->arg.fmode == 0)
88069f77 2880 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3c13cb5b
TM		 2881 if (calldata->roc)
2882 pnfs_roc_get_barrier(inode, &calldata->roc_barrier);
2883
6ae37339
TM		 2884 calldata->arg.share_access =
2885 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2886 calldata->arg.fmode, 0);
88069f77 2887
516a6af6 2888 nfs_fattr_init(calldata->res.fattr);
26e976a8 2889 calldata->timestamp = jiffies;
7fdab069 2890 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2891 &calldata->arg.seq_args,
2892 &calldata->res.seq_res,
2240a9e2
TM		 2893 task) != 0)
2894 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2895 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2896 return;
2897out_no_action:
2898 task->tk_action = NULL;
2899out_wait:
2900 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2901}
2902
963d8fe5 2903static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2904 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2905 .rpc_call_done = nfs4_close_done,
2906 .rpc_release = nfs4_free_closedata,
2907};
2908
fe08c546
PT		 2909static bool nfs4_roc(struct inode *inode)
2910{
40dd4b7a 2911 if (!nfs_have_layout(inode))
fe08c546 2912 return false;
fe08c546
PT		 2913 return pnfs_roc(inode);
2914}
2915
1da177e4
LT		 2916/*
2917 * It is possible for data to be read/written from a mem-mapped file
2918 * after the sys_close call (which hits the vfs layer as a flush).
2919 * This means that we can't safely call nfsv4 close on a file until
2920 * the inode is cleared. This in turn means that we are not good
2921 * NFSv4 citizens - we do not indicate to the server to update the file's
2922 * share state even when we are done with one of the three share
2923 * stateid's in the inode.
2924 *
2925 * NOTE: Caller must be holding the sp->so_owner semaphore!
2926 */
1f7977c1 2927int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2928{
4a35bd41 2929 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 2930 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 2931 struct nfs4_closedata *calldata;
b39e625b
TM		 2932 struct nfs4_state_owner *sp = state->owner;
2933 struct rpc_task *task;
5138fde0
TM		 2934 struct rpc_message msg = {
2935 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2936 .rpc_cred = state->owner->so_cred,
2937 };
c970aa85
TM		 2938 struct rpc_task_setup task_setup_data = {
2939 .rpc_client = server->client,
5138fde0 2940 .rpc_message = &msg,
c970aa85 2941 .callback_ops = &nfs4_close_ops,
101070ca 2942 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2943 .flags = RPC_TASK_ASYNC,
2944 };
9512135d 2945 int status = -ENOMEM;
1da177e4 2946
fa940720
WAA		 2947 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2948 &task_setup_data.rpc_client, &msg);
2949
8535b2be 2950 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2951 if (calldata == NULL)
9512135d 2952 goto out;
a9c92d6b 2953 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2954 calldata->inode = state->inode;
1da177e4 2955 calldata->state = state;
4a35bd41 2956 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 2957 /* Serialization for the sequence id */
63f5f796
TM		 2958 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2959 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 2960 if (IS_ERR(calldata->arg.seqid))
9512135d 2961 goto out_free_calldata;
dc0b027d 2962 calldata->arg.fmode = 0;
a65318bf 2963 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2964 calldata->res.fattr = &calldata->fattr;
c1d51931 2965 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2966 calldata->res.server = server;
fe08c546 2967 calldata->roc = nfs4_roc(state->inode);
643168c2 2968 nfs_sb_active(calldata->inode->i_sb);
9512135d 2969
1174dd1f
TM		 2970 msg.rpc_argp = &calldata->arg;
2971 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2972 task_setup_data.callback_data = calldata;
2973 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2974 if (IS_ERR(task))
2975 return PTR_ERR(task);
a49c3c77
TM		 2976 status = 0;
2977 if (wait)
2978 status = rpc_wait_for_completion_task(task);
b39e625b 2979 rpc_put_task(task);
a49c3c77 2980 return status;
9512135d
TM		 2981out_free_calldata:
2982 kfree(calldata);
2983out:
b39e625b
TM		 2984 nfs4_put_open_state(state);
2985 nfs4_put_state_owner(sp);
9512135d 2986 return status;
1da177e4
LT		 2987}
2988
2b484297 2989static struct inode *
5bc2afc2
TM		 2990nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2991 int open_flags, struct iattr *attr, int *opened)
1da177e4 2992{
1da177e4 2993 struct nfs4_state *state;
aa9c2669
DQ		 2994 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2995
2996 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2997
565277f6 2998 /* Protect against concurrent sillydeletes */
5bc2afc2 2999 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 3000
3001 nfs4_label_release_security(label);
3002
f46e0bd3
TM		 3003 if (IS_ERR(state))
3004 return ERR_CAST(state);
275bb307 3005 return state->inode;
1da177e4
LT		 3006}
3007
1185a552 3008static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 3009{
3010 if (ctx->state == NULL)
3011 return;
3012 if (is_sync)
643168c2 3013 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 3014 else
643168c2 3015 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 3016}
1da177e4 3017
b944dba3
TM		 3018#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3019#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 3020#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 3021
1da177e4
LT		 3022static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3023{
8c61282f 3024 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 3025 struct nfs4_server_caps_arg args = {
3026 .fhandle = fhandle,
8c61282f 3027 .bitmask = bitmask,
43652ad5 3028 };
1da177e4
LT		 3029 struct nfs4_server_caps_res res = {};
3030 struct rpc_message msg = {
3031 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 3032 .rpc_argp = &args,
1da177e4
LT		 3033 .rpc_resp = &res,
3034 };
3035 int status;
3036
8c61282f
KM		 3037 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3038 FATTR4_WORD0_FH_EXPIRE_TYPE |
3039 FATTR4_WORD0_LINK_SUPPORT |
3040 FATTR4_WORD0_SYMLINK_SUPPORT |
3041 FATTR4_WORD0_ACLSUPPORT;
3042 if (minorversion)
3043 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3044
7c513058 3045 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3046 if (status == 0) {
b944dba3 3047 /* Sanity check the server answers */
8c61282f 3048 switch (minorversion) {
b944dba3
TM		 3049 case 0:
3050 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3051 res.attr_bitmask[2] = 0;
3052 break;
3053 case 1:
3054 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3055 break;
3056 case 2:
3057 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3058 }
1da177e4 3059 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 3060 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3061 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3062 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3063 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 3064 NFS_CAP_CTIME|NFS_CAP_MTIME|
3065 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 3066 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3067 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 3068 server->caps |= NFS_CAP_ACLS;
3069 if (res.has_links != 0)
3070 server->caps |= NFS_CAP_HARDLINKS;
3071 if (res.has_symlinks != 0)
3072 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 3073 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3074 server->caps |= NFS_CAP_FILEID;
3075 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3076 server->caps |= NFS_CAP_MODE;
3077 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3078 server->caps |= NFS_CAP_NLINK;
3079 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3080 server->caps |= NFS_CAP_OWNER;
3081 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3082 server->caps |= NFS_CAP_OWNER_GROUP;
3083 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3084 server->caps |= NFS_CAP_ATIME;
3085 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3086 server->caps |= NFS_CAP_CTIME;
3087 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3088 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 3089#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3090 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3091 server->caps |= NFS_CAP_SECURITY_LABEL;
3092#endif
3093 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3094 sizeof(server->attr_bitmask));
b944dba3 3095 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 3096
a65318bf
TM		 3097 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3098 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3099 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 3100 server->cache_consistency_bitmask[2] = 0;
8c61282f
KM		 3101 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3102 sizeof(server->exclcreat_bitmask));
1da177e4 3103 server->acl_bitmask = res.acl_bitmask;
264e6351 3104 server->fh_expire_type = res.fh_expire_type;
1da177e4 3105 }
cccef3b9 3106
1da177e4
LT		 3107 return status;
3108}
3109
55a97593 3110int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 3111{
3112 struct nfs4_exception exception = { };
3113 int err;
3114 do {
3115 err = nfs4_handle_exception(server,
3116 _nfs4_server_capabilities(server, fhandle),
3117 &exception);
3118 } while (exception.retry);
3119 return err;
3120}
3121
3122static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3123 struct nfs_fsinfo *info)
3124{
aa9c2669 3125 u32 bitmask[3];
1da177e4 3126 struct nfs4_lookup_root_arg args = {
aa9c2669 3127 .bitmask = bitmask,
1da177e4
LT		 3128 };
3129 struct nfs4_lookup_res res = {
3130 .server = server,
0e574af1 3131 .fattr = info->fattr,
1da177e4
LT		 3132 .fh = fhandle,
3133 };
3134 struct rpc_message msg = {
3135 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3136 .rpc_argp = &args,
3137 .rpc_resp = &res,
3138 };
008f55d0 3139
aa9c2669
DQ		 3140 bitmask[0] = nfs4_fattr_bitmap[0];
3141 bitmask[1] = nfs4_fattr_bitmap[1];
3142 /*
3143 * Process the label in the upcoming getfattr
3144 */
3145 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3146
0e574af1 3147 nfs_fattr_init(info->fattr);
7c513058 3148 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3149}
3150
3151static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3152 struct nfs_fsinfo *info)
3153{
3154 struct nfs4_exception exception = { };
3155 int err;
3156 do {
fb8a5ba8 3157 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3158 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3159 switch (err) {
3160 case 0:
3161 case -NFS4ERR_WRONGSEC:
05e9cfb4 3162 goto out;
fb8a5ba8
BS		 3163 default:
3164 err = nfs4_handle_exception(server, err, &exception);
3165 }
1da177e4 3166 } while (exception.retry);
05e9cfb4 3167out:
1da177e4
LT		 3168 return err;
3169}
3170
8f70e95f
BS		 3171static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3172 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3173{
c2190661
TM		 3174 struct rpc_auth_create_args auth_args = {
3175 .pseudoflavor = flavor,
3176 };
8f70e95f
BS		 3177 struct rpc_auth *auth;
3178 int ret;
3179
c2190661 3180 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3181 if (IS_ERR(auth)) {
75bc8821 3182 ret = -EACCES;
8f70e95f
BS		 3183 goto out;
3184 }
3185 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3186out:
3187 return ret;
3188}
3189
9a744ba3
CL		 3190/*
3191 * Retry pseudoroot lookup with various security flavors. We do this when:
3192 *
3193 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3194 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3195 *
3196 * Returns zero on success, or a negative NFS4ERR value, or a
3197 * negative errno value.
3198 */
801a16dc 3199static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3200 struct nfs_fsinfo *info)
1da177e4 3201{
9a744ba3
CL		 3202 /* Per 3530bis 15.33.5 */
3203 static const rpc_authflavor_t flav_array[] = {
3204 RPC_AUTH_GSS_KRB5P,
3205 RPC_AUTH_GSS_KRB5I,
3206 RPC_AUTH_GSS_KRB5,
c4eafe11 3207 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3208 RPC_AUTH_NULL,
3209 };
3210 int status = -EPERM;
3211 size_t i;
6a1a1e34 3212
4d4b69dd
WAA		 3213 if (server->auth_info.flavor_len > 0) {
3214 /* try each flavor specified by user */
3215 for (i = 0; i < server->auth_info.flavor_len; i++) {
3216 status = nfs4_lookup_root_sec(server, fhandle, info,
3217 server->auth_info.flavors[i]);
3218 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3219 continue;
3220 break;
3221 }
3222 } else {
3223 /* no flavors specified by user, try default list */
3224 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3225 status = nfs4_lookup_root_sec(server, fhandle, info,
3226 flav_array[i]);
3227 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3228 continue;
3229 break;
3230 }
8f70e95f 3231 }
9a744ba3 3232
fb8a5ba8
BS		 3233 /*
3234 * -EACCESS could mean that the user doesn't have correct permissions
3235 * to access the mount. It could also mean that we tried to mount
3236 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3237 * existing mount programs don't handle -EACCES very well so it should
3238 * be mapped to -EPERM instead.
3239 */
3240 if (status == -EACCES)
3241 status = -EPERM;
801a16dc
BS		 3242 return status;
3243}
3244
2ed4b95b
CL		 3245static int nfs4_do_find_root_sec(struct nfs_server *server,
3246 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3247{
3248 int mv = server->nfs_client->cl_minorversion;
3249 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3250}
3251
3252/**
3253 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3254 * @server: initialized nfs_server handle
3255 * @fhandle: we fill in the pseudo-fs root file handle
3256 * @info: we fill in an FSINFO struct
5e6b1990 3257 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3258 *
3259 * Returns zero on success, or a negative errno.
801a16dc 3260 */
3028eb2b 3261int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3262 struct nfs_fsinfo *info,
3263 bool auth_probe)
801a16dc 3264{
c7757074 3265 int status = 0;
2ed4b95b 3266
c7757074 3267 if (!auth_probe)
5e6b1990 3268 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3269
3270 if (auth_probe || status == NFS4ERR_WRONGSEC)
2ed4b95b
CL		 3271 status = nfs4_do_find_root_sec(server, fhandle, info);
3272
1da177e4
LT		 3273 if (status == 0)
3274 status = nfs4_server_capabilities(server, fhandle);
3275 if (status == 0)
3276 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3277
c12e87f4 3278 return nfs4_map_errors(status);
1da177e4
LT		 3279}
3280
bae36241
BS		 3281static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3282 struct nfs_fsinfo *info)
3283{
3284 int error;
3285 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3286 struct nfs4_label *label = NULL;
bae36241
BS		 3287
3288 error = nfs4_server_capabilities(server, mntfh);
3289 if (error < 0) {
3290 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3291 return error;
3292 }
3293
14c43f76
DQ		 3294 label = nfs4_label_alloc(server, GFP_KERNEL);
3295 if (IS_ERR(label))
3296 return PTR_ERR(label);
3297
1775fd3e 3298 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3299 if (error < 0) {
3300 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3301 goto err_free_label;
bae36241
BS		 3302 }
3303
3304 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3305 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3306 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3307
14c43f76
DQ		 3308err_free_label:
3309 nfs4_label_free(label);
3310
bae36241
BS		 3311 return error;
3312}
3313
6b97fd3d
MN		 3314/*
3315 * Get locations and (maybe) other attributes of a referral.
3316 * Note that we'll actually follow the referral later when
3317 * we detect fsid mismatch in inode revalidation
3318 */
f05d147f
BS		 3319static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3320 const struct qstr *name, struct nfs_fattr *fattr,
3321 struct nfs_fh *fhandle)
6b97fd3d
MN		 3322{
3323 int status = -ENOMEM;
3324 struct page *page = NULL;
3325 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3326
3327 page = alloc_page(GFP_KERNEL);
3328 if (page == NULL)
3329 goto out;
3330 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3331 if (locations == NULL)
3332 goto out;
3333
f05d147f 3334 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3335 if (status != 0)
3336 goto out;
519ae255
CL		 3337
3338 /*
3339 * If the fsid didn't change, this is a migration event, not a
3340 * referral. Cause us to drop into the exception handler, which
3341 * will kick off migration recovery.
3342 */
6b97fd3d 3343 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3344 dprintk("%s: server did not return a different fsid for"
3345 " a referral at %s\n", __func__, name->name);
519ae255 3346 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3347 goto out;
3348 }
533eb461
AA		 3349 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3350 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3351
533eb461 3352 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3353 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3354 memset(fhandle, 0, sizeof(struct nfs_fh));
3355out:
3356 if (page)
3357 __free_page(page);
5d7ca35a 3358 kfree(locations);
6b97fd3d
MN		 3359 return status;
3360}
3361
1775fd3e
DQ		 3362static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3363 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3364{
3365 struct nfs4_getattr_arg args = {
3366 .fh = fhandle,
3367 .bitmask = server->attr_bitmask,
3368 };
3369 struct nfs4_getattr_res res = {
3370 .fattr = fattr,
1775fd3e 3371 .label = label,
1da177e4
LT		 3372 .server = server,
3373 };
3374 struct rpc_message msg = {
3375 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3376 .rpc_argp = &args,
3377 .rpc_resp = &res,
3378 };
aa9c2669
DQ		 3379
3380 args.bitmask = nfs4_bitmask(server, label);
3381
0e574af1 3382 nfs_fattr_init(fattr);
7c513058 3383 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3384}
3385
1775fd3e
DQ		 3386static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3387 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3388{
3389 struct nfs4_exception exception = { };
3390 int err;
3391 do {
b5f875a9
TM		 3392 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3393 trace_nfs4_getattr(server, fhandle, fattr, err);
3394 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3395 &exception);
3396 } while (exception.retry);
3397 return err;
3398}
3399
3400/*
3401 * The file is not closed if it is opened due to the a request to change
3402 * the size of the file. The open call will not be needed once the
3403 * VFS layer lookup-intents are implemented.
3404 *
3405 * Close is called when the inode is destroyed.
3406 * If we haven't opened the file for O_WRONLY, we
3407 * need to in the size_change case to obtain a stateid.
3408 *
3409 * Got race?
3410 * Because OPEN is always done by name in nfsv4, it is
3411 * possible that we opened a different file by the same
3412 * name. We can recognize this race condition, but we
3413 * can't do anything about it besides returning an error.
3414 *
3415 * This will be fixed with VFS changes (lookup-intent).
3416 */
3417static int
3418nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3419 struct iattr *sattr)
3420{
2b0143b5 3421 struct inode *inode = d_inode(dentry);
659bfcd6 3422 struct rpc_cred *cred = NULL;
d530838b 3423 struct nfs4_state *state = NULL;
14c43f76 3424 struct nfs4_label *label = NULL;
1da177e4
LT		 3425 int status;
3426
88ac815c
PT		 3427 if (pnfs_ld_layoutret_on_setattr(inode) &&
3428 sattr->ia_valid & ATTR_SIZE &&
3429 sattr->ia_size < i_size_read(inode))
24028672 3430 pnfs_commit_and_return_layout(inode);
8a1636c4 3431
0e574af1 3432 nfs_fattr_init(fattr);
1da177e4 3433
2669940d
AA		 3434 /* Deal with open(O_TRUNC) */
3435 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3436 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3437
3438 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3439 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3440 return 0;
3441
d530838b 3442 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3443 if (sattr->ia_valid & ATTR_FILE) {
3444 struct nfs_open_context *ctx;
3445
3446 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3447 if (ctx) {
3448 cred = ctx->cred;
3449 state = ctx->state;
3450 }
659bfcd6 3451 }
08e9eac4 3452
14c43f76
DQ		 3453 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3454 if (IS_ERR(label))
3455 return PTR_ERR(label);
3456
3457 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3458 if (status == 0) {
f044636d 3459 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3460 nfs_setsecurity(inode, fattr, label);
3461 }
14c43f76 3462 nfs4_label_free(label);
1da177e4
LT		 3463 return status;
3464}
3465
0c2e53f1
TM		 3466static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3467 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3468 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3469{
0c2e53f1 3470 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3471 int status;
3472 struct nfs4_lookup_arg args = {
3473 .bitmask = server->attr_bitmask,
0c2e53f1 3474 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3475 .name = name,
3476 };
3477 struct nfs4_lookup_res res = {
3478 .server = server,
3479 .fattr = fattr,
aa9c2669 3480 .label = label,
2b3de441
DH		 3481 .fh = fhandle,
3482 };
3483 struct rpc_message msg = {
3484 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3485 .rpc_argp = &args,
3486 .rpc_resp = &res,
3487 };
3488
aa9c2669
DQ		 3489 args.bitmask = nfs4_bitmask(server, label);
3490
2b3de441
DH		 3491 nfs_fattr_init(fattr);
3492
1da177e4 3493 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3494 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3495 dprintk("NFS reply lookup: %d\n", status);
3496 return status;
3497}
3498
72de53ec 3499static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3500{
7ebb9315 3501 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3502 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3503 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3504 fattr->nlink = 2;
3505}
3506
72de53ec
BS		 3507static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3508 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3509 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3510{
3511 struct nfs4_exception exception = { };
72de53ec 3512 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3513 int err;
3514 do {
1775fd3e 3515 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3516 trace_nfs4_lookup(dir, name, err);
72de53ec 3517 switch (err) {
08ef7bd3 3518 case -NFS4ERR_BADNAME:
72de53ec
BS		 3519 err = -ENOENT;
3520 goto out;
0c2e53f1 3521 case -NFS4ERR_MOVED:
f05d147f 3522 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3523 if (err == -NFS4ERR_MOVED)
3524 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3525 goto out;
0c2e53f1 3526 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3527 err = -EPERM;
3528 if (client != *clnt)
3529 goto out;
66b06860 3530 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3531 if (IS_ERR(client))
3532 return PTR_ERR(client);
3533
3534 exception.retry = 1;
3535 break;
3536 default:
3537 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3538 }
1da177e4 3539 } while (exception.retry);
72de53ec
BS		 3540
3541out:
3542 if (err == 0)
3543 *clnt = client;
3544 else if (client != *clnt)
3545 rpc_shutdown_client(client);
3546
1da177e4
LT		 3547 return err;
3548}
3549
80a16b21 3550static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3551 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3552 struct nfs4_label *label)
72de53ec
BS		 3553{
3554 int status;
3555 struct rpc_clnt *client = NFS_CLIENT(dir);
3556
1775fd3e 3557 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3558 if (client != NFS_CLIENT(dir)) {
3559 rpc_shutdown_client(client);
3560 nfs_fixup_secinfo_attributes(fattr);
3561 }
3562 return status;
3563}
3564
f05d147f
BS		 3565struct rpc_clnt *
3566nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3567 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3568{
b72888cb 3569 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3570 int status;
f05d147f 3571
1775fd3e 3572 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3573 if (status < 0)
f05d147f 3574 return ERR_PTR(status);
b72888cb 3575 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3576}
3577
1da177e4
LT		 3578static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3579{
76b32999 3580 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3581 struct nfs4_accessargs args = {
3582 .fh = NFS_FH(inode),
a4980e78 3583 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3584 };
3585 struct nfs4_accessres res = {
3586 .server = server,
1da177e4 3587 };
1da177e4
LT		 3588 struct rpc_message msg = {
3589 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3590 .rpc_argp = &args,
3591 .rpc_resp = &res,
3592 .rpc_cred = entry->cred,
3593 };
3594 int mode = entry->mask;
aa9c2669 3595 int status = 0;
1da177e4
LT		 3596
3597 /*
3598 * Determine which access bits we want to ask for...
3599 */
3600 if (mode & MAY_READ)
3601 args.access |= NFS4_ACCESS_READ;
3602 if (S_ISDIR(inode->i_mode)) {
3603 if (mode & MAY_WRITE)
3604 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3605 if (mode & MAY_EXEC)
3606 args.access |= NFS4_ACCESS_LOOKUP;
3607 } else {
3608 if (mode & MAY_WRITE)
3609 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3610 if (mode & MAY_EXEC)
3611 args.access |= NFS4_ACCESS_EXECUTE;
3612 }
c407d41a
TM		 3613
3614 res.fattr = nfs_alloc_fattr();
3615 if (res.fattr == NULL)
3616 return -ENOMEM;
3617
7c513058 3618 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3619 if (!status) {
6168f62c 3620 nfs_access_set_mask(entry, res.access);
c407d41a 3621 nfs_refresh_inode(inode, res.fattr);
1da177e4 3622 }
c407d41a 3623 nfs_free_fattr(res.fattr);
1da177e4
LT		 3624 return status;
3625}
3626
3627static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3628{
3629 struct nfs4_exception exception = { };
3630 int err;
3631 do {
c1578b76
TM		 3632 err = _nfs4_proc_access(inode, entry);
3633 trace_nfs4_access(inode, err);
3634 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3635 &exception);
3636 } while (exception.retry);
3637 return err;
3638}
3639
3640/*
3641 * TODO: For the time being, we don't try to get any attributes
3642 * along with any of the zero-copy operations READ, READDIR,
3643 * READLINK, WRITE.
3644 *
3645 * In the case of the first three, we want to put the GETATTR
3646 * after the read-type operation -- this is because it is hard
3647 * to predict the length of a GETATTR response in v4, and thus
3648 * align the READ data correctly. This means that the GETATTR
3649 * may end up partially falling into the page cache, and we should
3650 * shift it into the 'tail' of the xdr_buf before processing.
3651 * To do this efficiently, we need to know the total length
3652 * of data received, which doesn't seem to be available outside
3653 * of the RPC layer.
3654 *
3655 * In the case of WRITE, we also want to put the GETATTR after
3656 * the operation -- in this case because we want to make sure
140150db 3657 * we get the post-operation mtime and size.
1da177e4
LT		 3658 *
3659 * Both of these changes to the XDR layer would in fact be quite
3660 * minor, but I decided to leave them for a subsequent patch.
3661 */
3662static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3663 unsigned int pgbase, unsigned int pglen)
3664{
3665 struct nfs4_readlink args = {
3666 .fh = NFS_FH(inode),
3667 .pgbase = pgbase,
3668 .pglen = pglen,
3669 .pages = &page,
3670 };
f50c7000 3671 struct nfs4_readlink_res res;
1da177e4
LT		 3672 struct rpc_message msg = {
3673 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3674 .rpc_argp = &args,
f50c7000 3675 .rpc_resp = &res,
1da177e4
LT		 3676 };
3677
7c513058 3678 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3679}
3680
3681static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3682 unsigned int pgbase, unsigned int pglen)
3683{
3684 struct nfs4_exception exception = { };
3685 int err;
3686 do {
c1578b76
TM		 3687 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3688 trace_nfs4_readlink(inode, err);
3689 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3690 &exception);
3691 } while (exception.retry);
3692 return err;
3693}
3694
1da177e4 3695/*
8867fe58 3696 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3697 */
1da177e4
LT		 3698static int
3699nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3700 int flags)
1da177e4 3701{
aa9c2669 3702 struct nfs4_label l, *ilabel = NULL;
8867fe58 3703 struct nfs_open_context *ctx;
1da177e4 3704 struct nfs4_state *state;
1da177e4
LT		 3705 int status = 0;
3706
8867fe58
MS		 3707 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3708 if (IS_ERR(ctx))
3709 return PTR_ERR(ctx);
3710
aa9c2669
DQ		 3711 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3712
a8a5da99 3713 sattr->ia_mode &= ~current_umask();
c5c3fb5f 3714 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 3715 if (IS_ERR(state)) {
3716 status = PTR_ERR(state);
c0204fd2 3717 goto out;
1da177e4 3718 }
1da177e4 3719out:
aa9c2669 3720 nfs4_label_release_security(ilabel);
8867fe58 3721 put_nfs_open_context(ctx);
1da177e4
LT		 3722 return status;
3723}
3724
3725static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3726{
16e42959 3727 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3728 struct nfs_removeargs args = {
1da177e4 3729 .fh = NFS_FH(dir),
26fe5750 3730 .name = *name,
16e42959 3731 };
4fdc17b2 3732 struct nfs_removeres res = {
16e42959 3733 .server = server,
1da177e4 3734 };
1da177e4 3735 struct rpc_message msg = {
4fdc17b2
TM		 3736 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3737 .rpc_argp = &args,
3738 .rpc_resp = &res,
1da177e4 3739 };
778d2817 3740 int status;
1da177e4 3741
7c513058 3742 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3743 if (status == 0)
16e42959 3744 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3745 return status;
3746}
3747
3748static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3749{
3750 struct nfs4_exception exception = { };
3751 int err;
3752 do {
078ea3df
TM		 3753 err = _nfs4_proc_remove(dir, name);
3754 trace_nfs4_remove(dir, name, err);
3755 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3756 &exception);
3757 } while (exception.retry);
3758 return err;
3759}
3760
e4eff1a6 3761static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3762{
e4eff1a6
TM		 3763 struct nfs_server *server = NFS_SERVER(dir);
3764 struct nfs_removeargs *args = msg->rpc_argp;
3765 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3766
e4eff1a6 3767 res->server = server;
1da177e4 3768 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3769 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3770
3771 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3772}
3773
34e137cc
BS		 3774static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3775{
d9afbd1b
TM		 3776 nfs4_setup_sequence(NFS_SERVER(data->dir),
3777 &data->args.seq_args,
3778 &data->res.seq_res,
3779 task);
1da177e4
LT		 3780}
3781
e4eff1a6 3782static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3783{
078ea3df
TM		 3784 struct nfs_unlinkdata *data = task->tk_calldata;
3785 struct nfs_removeres *res = &data->res;
e4eff1a6 3786
14516c3a
TM		 3787 if (!nfs4_sequence_done(task, &res->seq_res))
3788 return 0;
8478eaa1
N		 3789 if (nfs4_async_handle_error(task, res->server, NULL,
3790 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3791 return 0;
3792 update_changeattr(dir, &res->cinfo);
e4eff1a6 3793 return 1;
1da177e4
LT		 3794}
3795
d3d4152a
JL		 3796static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3797{
3798 struct nfs_server *server = NFS_SERVER(dir);
3799 struct nfs_renameargs *arg = msg->rpc_argp;
3800 struct nfs_renameres *res = msg->rpc_resp;
3801
3802 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3803 res->server = server;
a9c92d6b 3804 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3805}
3806
c6bfa1a1
BS		 3807static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3808{
d9afbd1b
TM		 3809 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3810 &data->args.seq_args,
3811 &data->res.seq_res,
3812 task);
d3d4152a
JL		 3813}
3814
3815static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3816 struct inode *new_dir)
3817{
fbc6f7c2
TM		 3818 struct nfs_renamedata *data = task->tk_calldata;
3819 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3820
3821 if (!nfs4_sequence_done(task, &res->seq_res))
3822 return 0;
8478eaa1 3823 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3824 return 0;
3825
3826 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3827 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3828 return 1;
3829}
3830
1da177e4
LT		 3831static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3832{
91ba2eee 3833 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3834 struct nfs4_link_arg arg = {
3835 .fh = NFS_FH(inode),
3836 .dir_fh = NFS_FH(dir),
3837 .name = name,
91ba2eee
TM		 3838 .bitmask = server->attr_bitmask,
3839 };
91ba2eee
TM		 3840 struct nfs4_link_res res = {
3841 .server = server,
1775fd3e 3842 .label = NULL,
1da177e4 3843 };
1da177e4
LT		 3844 struct rpc_message msg = {
3845 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3846 .rpc_argp = &arg,
91ba2eee 3847 .rpc_resp = &res,
1da177e4 3848 };
136f2627
TM		 3849 int status = -ENOMEM;
3850
3851 res.fattr = nfs_alloc_fattr();
778d2817 3852 if (res.fattr == NULL)
136f2627 3853 goto out;
1da177e4 3854
14c43f76
DQ		 3855 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3856 if (IS_ERR(res.label)) {
3857 status = PTR_ERR(res.label);
3858 goto out;
3859 }
aa9c2669 3860 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3861
7c513058 3862 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3863 if (!status) {
3864 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3865 status = nfs_post_op_update_inode(inode, res.fattr);
3866 if (!status)
3867 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3868 }
14c43f76
DQ		 3869
3870
3871 nfs4_label_free(res.label);
3872
136f2627 3873out:
136f2627 3874 nfs_free_fattr(res.fattr);
1da177e4
LT		 3875 return status;
3876}
3877
3878static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3879{
3880 struct nfs4_exception exception = { };
3881 int err;
3882 do {
3883 err = nfs4_handle_exception(NFS_SERVER(inode),
3884 _nfs4_proc_link(inode, dir, name),
3885 &exception);
3886 } while (exception.retry);
3887 return err;
3888}
3889
57dc9a57
TM		 3890struct nfs4_createdata {
3891 struct rpc_message msg;
3892 struct nfs4_create_arg arg;
3893 struct nfs4_create_res res;
3894 struct nfs_fh fh;
3895 struct nfs_fattr fattr;
1775fd3e 3896 struct nfs4_label *label;
57dc9a57
TM		 3897};
3898
3899static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3900 struct qstr *name, struct iattr *sattr, u32 ftype)
3901{
3902 struct nfs4_createdata *data;
3903
3904 data = kzalloc(sizeof(*data), GFP_KERNEL);
3905 if (data != NULL) {
3906 struct nfs_server *server = NFS_SERVER(dir);
3907
14c43f76
DQ		 3908 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3909 if (IS_ERR(data->label))
3910 goto out_free;
3911
57dc9a57
TM		 3912 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3913 data->msg.rpc_argp = &data->arg;
3914 data->msg.rpc_resp = &data->res;
3915 data->arg.dir_fh = NFS_FH(dir);
3916 data->arg.server = server;
3917 data->arg.name = name;
3918 data->arg.attrs = sattr;
3919 data->arg.ftype = ftype;
aa9c2669 3920 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3921 data->res.server = server;
3922 data->res.fh = &data->fh;
3923 data->res.fattr = &data->fattr;
1775fd3e 3924 data->res.label = data->label;
57dc9a57 3925 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3926 }
3927 return data;
14c43f76
DQ		 3928out_free:
3929 kfree(data);
3930 return NULL;
57dc9a57
TM		 3931}
3932
3933static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3934{
7c513058 3935 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3936 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3937 if (status == 0) {
3938 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3939 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3940 }
3941 return status;
3942}
3943
3944static void nfs4_free_createdata(struct nfs4_createdata *data)
3945{
14c43f76 3946 nfs4_label_free(data->label);
57dc9a57
TM		 3947 kfree(data);
3948}
3949
4f390c15 3950static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3951 struct page *page, unsigned int len, struct iattr *sattr,
3952 struct nfs4_label *label)
1da177e4 3953{
57dc9a57
TM		 3954 struct nfs4_createdata *data;
3955 int status = -ENAMETOOLONG;
1da177e4 3956
94a6d753 3957 if (len > NFS4_MAXPATHLEN)
57dc9a57 3958 goto out;
4f390c15 3959
57dc9a57
TM		 3960 status = -ENOMEM;
3961 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3962 if (data == NULL)
3963 goto out;
3964
3965 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3966 data->arg.u.symlink.pages = &page;
3967 data->arg.u.symlink.len = len;
1775fd3e 3968 data->arg.label = label;
1da177e4 3969
57dc9a57
TM		 3970 status = nfs4_do_create(dir, dentry, data);
3971
3972 nfs4_free_createdata(data);
3973out:
1da177e4
LT		 3974 return status;
3975}
3976
4f390c15 3977static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3978 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3979{
3980 struct nfs4_exception exception = { };
aa9c2669 3981 struct nfs4_label l, *label = NULL;
1da177e4 3982 int err;
aa9c2669
DQ		 3983
3984 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3985
1da177e4 3986 do {
078ea3df
TM		 3987 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3988 trace_nfs4_symlink(dir, &dentry->d_name, err);
3989 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3990 &exception);
3991 } while (exception.retry);
aa9c2669
DQ		 3992
3993 nfs4_label_release_security(label);
1da177e4
LT		 3994 return err;
3995}
3996
3997static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3998 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3999{
57dc9a57
TM		 4000 struct nfs4_createdata *data;
4001 int status = -ENOMEM;
1da177e4 4002
57dc9a57
TM		 4003 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4004 if (data == NULL)
4005 goto out;
4006
1775fd3e 4007 data->arg.label = label;
57dc9a57
TM		 4008 status = nfs4_do_create(dir, dentry, data);
4009
4010 nfs4_free_createdata(data);
4011out:
1da177e4
LT		 4012 return status;
4013}
4014
4015static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4016 struct iattr *sattr)
4017{
4018 struct nfs4_exception exception = { };
aa9c2669 4019 struct nfs4_label l, *label = NULL;
1da177e4 4020 int err;
a8a5da99 4021
aa9c2669
DQ		 4022 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4023
a8a5da99 4024 sattr->ia_mode &= ~current_umask();
1da177e4 4025 do {
078ea3df
TM		 4026 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4027 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4028 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4029 &exception);
4030 } while (exception.retry);
aa9c2669
DQ		 4031 nfs4_label_release_security(label);
4032
1da177e4
LT		 4033 return err;
4034}
4035
4036static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4037 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4 4038{
2b0143b5 4039 struct inode *dir = d_inode(dentry);
1da177e4
LT		 4040 struct nfs4_readdir_arg args = {
4041 .fh = NFS_FH(dir),
56e4ebf8 4042 .pages = pages,
1da177e4
LT		 4043 .pgbase = 0,
4044 .count = count,
2b0143b5 4045 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 4046 .plus = plus,
1da177e4
LT		 4047 };
4048 struct nfs4_readdir_res res;
4049 struct rpc_message msg = {
4050 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4051 .rpc_argp = &args,
4052 .rpc_resp = &res,
4053 .rpc_cred = cred,
4054 };
4055 int status;
4056
6de1472f
AV		 4057 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4058 dentry,
eadf4598 4059 (unsigned long long)cookie);
c3f52af3 4060 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 4061 res.pgbase = args.pgbase;
7c513058 4062 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 4063 if (status >= 0) {
c3f52af3 4064 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 4065 status += args.pgbase;
4066 }
c4812998
TM		 4067
4068 nfs_invalidate_atime(dir);
4069
3110ff80 4070 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 4071 return status;
4072}
4073
4074static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4075 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 4076{
4077 struct nfs4_exception exception = { };
4078 int err;
4079 do {
c1578b76
TM		 4080 err = _nfs4_proc_readdir(dentry, cred, cookie,
4081 pages, count, plus);
2b0143b5
DH		 4082 trace_nfs4_readdir(d_inode(dentry), err);
4083 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 4084 &exception);
4085 } while (exception.retry);
4086 return err;
4087}
4088
4089static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 4090 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 4091{
57dc9a57
TM		 4092 struct nfs4_createdata *data;
4093 int mode = sattr->ia_mode;
4094 int status = -ENOMEM;
1da177e4 4095
57dc9a57
TM		 4096 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4097 if (data == NULL)
4098 goto out;
4099
1da177e4 4100 if (S_ISFIFO(mode))
57dc9a57 4101 data->arg.ftype = NF4FIFO;
1da177e4 4102 else if (S_ISBLK(mode)) {
57dc9a57
TM		 4103 data->arg.ftype = NF4BLK;
4104 data->arg.u.device.specdata1 = MAJOR(rdev);
4105 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 4106 }
4107 else if (S_ISCHR(mode)) {
57dc9a57
TM		 4108 data->arg.ftype = NF4CHR;
4109 data->arg.u.device.specdata1 = MAJOR(rdev);
4110 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 4111 } else if (!S_ISSOCK(mode)) {
4112 status = -EINVAL;
4113 goto out_free;
1da177e4 4114 }
1775fd3e 4115
aa9c2669 4116 data->arg.label = label;
57dc9a57 4117 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 4118out_free:
57dc9a57
TM		 4119 nfs4_free_createdata(data);
4120out:
1da177e4
LT		 4121 return status;
4122}
4123
4124static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4125 struct iattr *sattr, dev_t rdev)
4126{
4127 struct nfs4_exception exception = { };
aa9c2669 4128 struct nfs4_label l, *label = NULL;
1da177e4 4129 int err;
a8a5da99 4130
aa9c2669
DQ		 4131 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4132
a8a5da99 4133 sattr->ia_mode &= ~current_umask();
1da177e4 4134 do {
078ea3df
TM		 4135 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4136 trace_nfs4_mknod(dir, &dentry->d_name, err);
4137 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4138 &exception);
4139 } while (exception.retry);
aa9c2669
DQ		 4140
4141 nfs4_label_release_security(label);
4142
1da177e4
LT		 4143 return err;
4144}
4145
4146static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4147 struct nfs_fsstat *fsstat)
4148{
4149 struct nfs4_statfs_arg args = {
4150 .fh = fhandle,
4151 .bitmask = server->attr_bitmask,
4152 };
24ad148a
BH		 4153 struct nfs4_statfs_res res = {
4154 .fsstat = fsstat,
4155 };
1da177e4
LT		 4156 struct rpc_message msg = {
4157 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4158 .rpc_argp = &args,
24ad148a 4159 .rpc_resp = &res,
1da177e4
LT		 4160 };
4161
0e574af1 4162 nfs_fattr_init(fsstat->fattr);
7c513058 4163 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4164}
4165
4166static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4167{
4168 struct nfs4_exception exception = { };
4169 int err;
4170 do {
4171 err = nfs4_handle_exception(server,
4172 _nfs4_proc_statfs(server, fhandle, fsstat),
4173 &exception);
4174 } while (exception.retry);
4175 return err;
4176}
4177
4178static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4179 struct nfs_fsinfo *fsinfo)
4180{
4181 struct nfs4_fsinfo_arg args = {
4182 .fh = fhandle,
4183 .bitmask = server->attr_bitmask,
4184 };
3dda5e43
BH		 4185 struct nfs4_fsinfo_res res = {
4186 .fsinfo = fsinfo,
4187 };
1da177e4
LT		 4188 struct rpc_message msg = {
4189 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4190 .rpc_argp = &args,
3dda5e43 4191 .rpc_resp = &res,
1da177e4
LT		 4192 };
4193
7c513058 4194 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4195}
4196
4197static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4198{
4199 struct nfs4_exception exception = { };
83ca7f5a 4200 unsigned long now = jiffies;
1da177e4
LT		 4201 int err;
4202
4203 do {
83ca7f5a 4204 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4205 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 4206 if (err == 0) {
4207 struct nfs_client *clp = server->nfs_client;
4208
4209 spin_lock(&clp->cl_lock);
4210 clp->cl_lease_time = fsinfo->lease_time * HZ;
4211 clp->cl_last_renewal = now;
4212 spin_unlock(&clp->cl_lock);
4213 break;
4214 }
4215 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4216 } while (exception.retry);
4217 return err;
4218}
4219
4220static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4221{
e38eb650
BS		 4222 int error;
4223
0e574af1 4224 nfs_fattr_init(fsinfo->fattr);
e38eb650 4225 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4226 if (error == 0) {
4227 /* block layout checks this! */
4228 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4229 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4230 }
e38eb650
BS		 4231
4232 return error;
1da177e4
LT		 4233}
4234
4235static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4236 struct nfs_pathconf *pathconf)
4237{
4238 struct nfs4_pathconf_arg args = {
4239 .fh = fhandle,
4240 .bitmask = server->attr_bitmask,
4241 };
d45b2989
BH		 4242 struct nfs4_pathconf_res res = {
4243 .pathconf = pathconf,
4244 };
1da177e4
LT		 4245 struct rpc_message msg = {
4246 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4247 .rpc_argp = &args,
d45b2989 4248 .rpc_resp = &res,
1da177e4
LT		 4249 };
4250
4251 /* None of the pathconf attributes are mandatory to implement */
4252 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4253 memset(pathconf, 0, sizeof(*pathconf));
4254 return 0;
4255 }
4256
0e574af1 4257 nfs_fattr_init(pathconf->fattr);
7c513058 4258 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
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_exception exception = { };
4265 int err;
4266
4267 do {
4268 err = nfs4_handle_exception(server,
4269 _nfs4_proc_pathconf(server, fhandle, pathconf),
4270 &exception);
4271 } while (exception.retry);
4272 return err;
4273}
4274
5521abfd 4275int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4276 const struct nfs_open_context *ctx,
4277 const struct nfs_lock_context *l_ctx,
4278 fmode_t fmode)
4279{
4280 const struct nfs_lockowner *lockowner = NULL;
4281
4282 if (l_ctx != NULL)
4283 lockowner = &l_ctx->lockowner;
5521abfd 4284 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4285}
4286EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4287
5521abfd
TM		 4288static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4289 const struct nfs_open_context *ctx,
4290 const struct nfs_lock_context *l_ctx,
4291 fmode_t fmode)
4292{
4293 nfs4_stateid current_stateid;
4294
e1253be0
TM		 4295 /* If the current stateid represents a lost lock, then exit */
4296 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4297 return true;
5521abfd
TM		 4298 return nfs4_stateid_match(stateid, &current_stateid);
4299}
4300
4301static bool nfs4_error_stateid_expired(int err)
4302{
4303 switch (err) {
4304 case -NFS4ERR_DELEG_REVOKED:
4305 case -NFS4ERR_ADMIN_REVOKED:
4306 case -NFS4ERR_BAD_STATEID:
4307 case -NFS4ERR_STALE_STATEID:
4308 case -NFS4ERR_OLD_STATEID:
4309 case -NFS4ERR_OPENMODE:
4310 case -NFS4ERR_EXPIRED:
4311 return true;
4312 }
4313 return false;
4314}
4315
d45f60c6 4316void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4317{
d45f60c6 4318 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4319}
4320
d45f60c6 4321static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4322{
d45f60c6 4323 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4324
d45f60c6
WAA		 4325 trace_nfs4_read(hdr, task->tk_status);
4326 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4327 hdr->args.context->state,
4328 NULL) == -EAGAIN) {
d00c5d43 4329 rpc_restart_call_prepare(task);
ec06c096 4330 return -EAGAIN;
1da177e4 4331 }
8850df99 4332
d45f60c6 4333 __nfs4_read_done_cb(hdr);
1da177e4 4334 if (task->tk_status > 0)
d45f60c6 4335 renew_lease(server, hdr->timestamp);
ec06c096 4336 return 0;
1da177e4
LT		 4337}
4338
5521abfd 4339static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4340 struct nfs_pgio_args *args)
5521abfd
TM		 4341{
4342
4343 if (!nfs4_error_stateid_expired(task->tk_status) ||
4344 nfs4_stateid_is_current(&args->stateid,
4345 args->context,
4346 args->lock_context,
4347 FMODE_READ))
4348 return false;
4349 rpc_restart_call_prepare(task);
4350 return true;
4351}
4352
d45f60c6 4353static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4354{
4355
4356 dprintk("--> %s\n", __func__);
4357
d45f60c6 4358 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4359 return -EAGAIN;
d45f60c6 4360 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4361 return -EAGAIN;
d45f60c6
WAA		 4362 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4363 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4364}
4365
d45f60c6
WAA		 4366static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4367 struct rpc_message *msg)
1da177e4 4368{
d45f60c6
WAA		 4369 hdr->timestamp = jiffies;
4370 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4371 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4372 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4373}
4374
d45f60c6
WAA		 4375static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4376 struct nfs_pgio_header *hdr)
ea7c3303 4377{
d45f60c6
WAA		 4378 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4379 &hdr->args.seq_args,
4380 &hdr->res.seq_res,
9b206149 4381 task))
ef1820f9 4382 return 0;
d45f60c6
WAA		 4383 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4384 hdr->args.lock_context,
4385 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4386 return -EIO;
d45f60c6 4387 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4388 return -EIO;
4389 return 0;
1da177e4
LT		 4390}
4391
d45f60c6
WAA		 4392static int nfs4_write_done_cb(struct rpc_task *task,
4393 struct nfs_pgio_header *hdr)
1da177e4 4394{
d45f60c6 4395 struct inode *inode = hdr->inode;
8478eaa1 4396
d45f60c6
WAA		 4397 trace_nfs4_write(hdr, task->tk_status);
4398 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4399 hdr->args.context->state,
4400 NULL) == -EAGAIN) {
d00c5d43 4401 rpc_restart_call_prepare(task);
788e7a89 4402 return -EAGAIN;
1da177e4 4403 }
4f9838c7 4404 if (task->tk_status >= 0) {
d45f60c6 4405 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4406 nfs_writeback_update_inode(hdr);
4f9838c7 4407 }
788e7a89 4408 return 0;
1da177e4
LT		 4409}
4410
5521abfd 4411static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4412 struct nfs_pgio_args *args)
5521abfd
TM		 4413{
4414
4415 if (!nfs4_error_stateid_expired(task->tk_status) ||
4416 nfs4_stateid_is_current(&args->stateid,
4417 args->context,
4418 args->lock_context,
4419 FMODE_WRITE))
4420 return false;
4421 rpc_restart_call_prepare(task);
4422 return true;
4423}
4424
d45f60c6 4425static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4426{
d45f60c6 4427 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4428 return -EAGAIN;
d45f60c6 4429 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4430 return -EAGAIN;
d45f60c6
WAA		 4431 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4432 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4433}
4434
5a37f851 4435static
d45f60c6 4436bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4437{
5a37f851 4438 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4439 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4440 return false;
4441 /* Otherwise, request attributes if and only if we don't hold
4442 * a delegation
4443 */
011e2a7f 4444 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4445}
a69aef14 4446
d45f60c6
WAA		 4447static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4448 struct rpc_message *msg)
1da177e4 4449{
d45f60c6 4450 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4451
d45f60c6
WAA		 4452 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4453 hdr->args.bitmask = NULL;
4454 hdr->res.fattr = NULL;
7ffd1064 4455 } else
d45f60c6 4456 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4457
d45f60c6
WAA		 4458 if (!hdr->pgio_done_cb)
4459 hdr->pgio_done_cb = nfs4_write_done_cb;
4460 hdr->res.server = server;
4461 hdr->timestamp = jiffies;
1da177e4 4462
bdc7f021 4463 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4464 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4465}
4466
0b7c0153 4467static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4468{
d9afbd1b
TM		 4469 nfs4_setup_sequence(NFS_SERVER(data->inode),
4470 &data->args.seq_args,
4471 &data->res.seq_res,
4472 task);
1da177e4
LT		 4473}
4474
0b7c0153 4475static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4476{
1da177e4 4477 struct inode *inode = data->inode;
14516c3a 4478
cc668ab3 4479 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4480 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4481 NULL, NULL) == -EAGAIN) {
d00c5d43 4482 rpc_restart_call_prepare(task);
788e7a89 4483 return -EAGAIN;
1da177e4 4484 }
788e7a89 4485 return 0;
1da177e4
LT		 4486}
4487
0b7c0153 4488static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4489{
4490 if (!nfs4_sequence_done(task, &data->res.seq_res))
4491 return -EAGAIN;
0b7c0153 4492 return data->commit_done_cb(task, data);
5f452431
FI		 4493}
4494
0b7c0153 4495static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4496{
788e7a89 4497 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4498
0b7c0153
FI		 4499 if (data->commit_done_cb == NULL)
4500 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4501 data->res.server = server;
bdc7f021 4502 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4503 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4504}
4505
9bc4e3ca
CL		 4506struct nfs4_renewdata {
4507 struct nfs_client *client;
4508 unsigned long timestamp;
4509};
4510
1da177e4
LT		 4511/*
4512 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4513 * standalone procedure for queueing an asynchronous RENEW.
4514 */
9bc4e3ca 4515static void nfs4_renew_release(void *calldata)
dc96aef9 4516{
9bc4e3ca
CL		 4517 struct nfs4_renewdata *data = calldata;
4518 struct nfs_client *clp = data->client;
dc96aef9 4519
0851de06
AB		 4520 if (atomic_read(&clp->cl_count) > 1)
4521 nfs4_schedule_state_renewal(clp);
4522 nfs_put_client(clp);
9bc4e3ca 4523 kfree(data);
dc96aef9
AB		 4524}
4525
9bc4e3ca 4526static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4527{
9bc4e3ca
CL		 4528 struct nfs4_renewdata *data = calldata;
4529 struct nfs_client *clp = data->client;
4530 unsigned long timestamp = data->timestamp;
1da177e4 4531
c6d01c6f 4532 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4533 switch (task->tk_status) {
4534 case 0:
4535 break;
4536 case -NFS4ERR_LEASE_MOVED:
4537 nfs4_schedule_lease_moved_recovery(clp);
4538 break;
4539 default:
95baa25c 4540 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4541 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4542 return;
4543 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4544 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4545 return;
4546 }
4547 nfs4_schedule_path_down_recovery(clp);
1da177e4 4548 }
452e9352 4549 do_renew_lease(clp, timestamp);
1da177e4
LT		 4550}
4551
963d8fe5
TM		 4552static const struct rpc_call_ops nfs4_renew_ops = {
4553 .rpc_call_done = nfs4_renew_done,
dc96aef9 4554 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4555};
4556
2f60ea6b 4557static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4558{
4559 struct rpc_message msg = {
4560 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4561 .rpc_argp = clp,
b4454fe1 4562 .rpc_cred = cred,
1da177e4 4563 };
9bc4e3ca 4564 struct nfs4_renewdata *data;
1da177e4 4565
2f60ea6b
TM		 4566 if (renew_flags == 0)
4567 return 0;
0851de06
AB		 4568 if (!atomic_inc_not_zero(&clp->cl_count))
4569 return -EIO;
b569ad34 4570 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4571 if (data == NULL)
4572 return -ENOMEM;
4573 data->client = clp;
4574 data->timestamp = jiffies;
bc7a05ca 4575 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4576 &nfs4_renew_ops, data);
1da177e4
LT		 4577}
4578
8534d4ec 4579static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4580{
4581 struct rpc_message msg = {
4582 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4583 .rpc_argp = clp,
b4454fe1 4584 .rpc_cred = cred,
1da177e4
LT		 4585 };
4586 unsigned long now = jiffies;
4587 int status;
4588
bc7a05ca 4589 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4590 if (status < 0)
4591 return status;
452e9352 4592 do_renew_lease(clp, now);
1da177e4
LT		 4593 return 0;
4594}
4595
aa1870af
BF		 4596static inline int nfs4_server_supports_acls(struct nfs_server *server)
4597{
7dd7d959 4598 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4599}
4600
21f498c2
TM		 4601/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4602 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4603 * the stack.
4604 */
21f498c2 4605#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4606
e9e3d724 4607static int buf_to_pages_noslab(const void *buf, size_t buflen,
8fbcf237 4608 struct page **pages)
e9e3d724
NH		 4609{
4610 struct page *newpage, **spages;
4611 int rc = 0;
4612 size_t len;
4613 spages = pages;
4614
4615 do {
21f498c2 4616 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4617 newpage = alloc_page(GFP_KERNEL);
4618
4619 if (newpage == NULL)
4620 goto unwind;
4621 memcpy(page_address(newpage), buf, len);
4622 buf += len;
4623 buflen -= len;
4624 *pages++ = newpage;
4625 rc++;
4626 } while (buflen != 0);
4627
4628 return rc;
4629
4630unwind:
4631 for(; rc > 0; rc--)
4632 __free_page(spages[rc-1]);
4633 return -ENOMEM;
4634}
4635
e50a1c2e
BF		 4636struct nfs4_cached_acl {
4637 int cached;
4638 size_t len;
3e9d4154 4639 char data[0];
e50a1c2e
BF		 4640};
4641
4642static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4643{
4644 struct nfs_inode *nfsi = NFS_I(inode);
4645
4646 spin_lock(&inode->i_lock);
4647 kfree(nfsi->nfs4_acl);
4648 nfsi->nfs4_acl = acl;
4649 spin_unlock(&inode->i_lock);
4650}
4651
4652static void nfs4_zap_acl_attr(struct inode *inode)
4653{
4654 nfs4_set_cached_acl(inode, NULL);
4655}
4656
4657static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4658{
4659 struct nfs_inode *nfsi = NFS_I(inode);
4660 struct nfs4_cached_acl *acl;
4661 int ret = -ENOENT;
4662
4663 spin_lock(&inode->i_lock);
4664 acl = nfsi->nfs4_acl;
4665 if (acl == NULL)
4666 goto out;
4667 if (buf == NULL) /* user is just asking for length */
4668 goto out_len;
4669 if (acl->cached == 0)
4670 goto out;
4671 ret = -ERANGE; /* see getxattr(2) man page */
4672 if (acl->len > buflen)
4673 goto out;
4674 memcpy(buf, acl->data, acl->len);
4675out_len:
4676 ret = acl->len;
4677out:
4678 spin_unlock(&inode->i_lock);
4679 return ret;
4680}
4681
5794d21e 4682static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4683{
4684 struct nfs4_cached_acl *acl;
b291f1b1 4685 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4686
1f1ea6c2 4687 if (buflen <= PAGE_SIZE) {
b291f1b1 4688 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4689 if (acl == NULL)
4690 goto out;
4691 acl->cached = 1;
5794d21e 4692 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4693 } else {
4694 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4695 if (acl == NULL)
4696 goto out;
4697 acl->cached = 0;
4698 }
4699 acl->len = acl_len;
4700out:
4701 nfs4_set_cached_acl(inode, acl);
4702}
4703
bf118a34
AA		 4704/*
4705 * The getxattr API returns the required buffer length when called with a
4706 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4707 * the required buf. On a NULL buf, we send a page of data to the server
4708 * guessing that the ACL request can be serviced by a page. If so, we cache
4709 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4710 * the cache. If not so, we throw away the page, and cache the required
4711 * length. The next getxattr call will then produce another round trip to
4712 * the server, this time with the input buf of the required size.
4713 */
16b4289c 4714static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4715{
bf118a34 4716 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4717 struct nfs_getaclargs args = {
4718 .fh = NFS_FH(inode),
4719 .acl_pages = pages,
4720 .acl_len = buflen,
4721 };
663c79b3
BH		 4722 struct nfs_getaclres res = {
4723 .acl_len = buflen,
4724 };
aa1870af
BF		 4725 struct rpc_message msg = {
4726 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4727 .rpc_argp = &args,
663c79b3 4728 .rpc_resp = &res,
aa1870af 4729 };
21f498c2
TM		 4730 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4731 int ret = -ENOMEM, i;
aa1870af 4732
bf118a34
AA		 4733 /* As long as we're doing a round trip to the server anyway,
4734 * let's be prepared for a page of acl data. */
4735 if (npages == 0)
4736 npages = 1;
21f498c2
TM		 4737 if (npages > ARRAY_SIZE(pages))
4738 return -ERANGE;
5a006899 4739
bf118a34
AA		 4740 for (i = 0; i < npages; i++) {
4741 pages[i] = alloc_page(GFP_KERNEL);
4742 if (!pages[i])
4743 goto out_free;
e50a1c2e 4744 }
5a006899
SP		 4745
4746 /* for decoding across pages */
4747 res.acl_scratch = alloc_page(GFP_KERNEL);
4748 if (!res.acl_scratch)
4749 goto out_free;
4750
bf118a34 4751 args.acl_len = npages * PAGE_SIZE;
5a006899 4752
de040bec 4753 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4754 __func__, buf, buflen, npages, args.acl_len);
4755 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4756 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4757 if (ret)
4758 goto out_free;
bf118a34 4759
1f1ea6c2
TM		 4760 /* Handle the case where the passed-in buffer is too short */
4761 if (res.acl_flags & NFS4_ACL_TRUNC) {
4762 /* Did the user only issue a request for the acl length? */
4763 if (buf == NULL)
4764 goto out_ok;
e50a1c2e 4765 ret = -ERANGE;
1f1ea6c2 4766 goto out_free;
e50a1c2e 4767 }
1f1ea6c2 4768 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4769 if (buf) {
4770 if (res.acl_len > buflen) {
4771 ret = -ERANGE;
4772 goto out_free;
4773 }
1f1ea6c2 4774 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4775 }
1f1ea6c2
TM		 4776out_ok:
4777 ret = res.acl_len;
e50a1c2e 4778out_free:
bf118a34
AA		 4779 for (i = 0; i < npages; i++)
4780 if (pages[i])
4781 __free_page(pages[i]);
331818f1
TM		 4782 if (res.acl_scratch)
4783 __free_page(res.acl_scratch);
aa1870af
BF		 4784 return ret;
4785}
4786
16b4289c
TM		 4787static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4788{
4789 struct nfs4_exception exception = { };
4790 ssize_t ret;
4791 do {
4792 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4793 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4794 if (ret >= 0)
4795 break;
4796 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4797 } while (exception.retry);
4798 return ret;
4799}
4800
e50a1c2e
BF		 4801static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4802{
4803 struct nfs_server *server = NFS_SERVER(inode);
4804 int ret;
4805
4806 if (!nfs4_server_supports_acls(server))
4807 return -EOPNOTSUPP;
4808 ret = nfs_revalidate_inode(server, inode);
4809 if (ret < 0)
4810 return ret;
08a22b39
AK		 4811 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4812 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4813 ret = nfs4_read_cached_acl(inode, buf, buflen);
4814 if (ret != -ENOENT)
bf118a34
AA		 4815 /* -ENOENT is returned if there is no ACL or if there is an ACL
4816 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4817 return ret;
4818 return nfs4_get_acl_uncached(inode, buf, buflen);
4819}
4820
16b4289c 4821static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4822{
4823 struct nfs_server *server = NFS_SERVER(inode);
4824 struct page *pages[NFS4ACL_MAXPAGES];
4825 struct nfs_setaclargs arg = {
4826 .fh = NFS_FH(inode),
4827 .acl_pages = pages,
4828 .acl_len = buflen,
4829 };
73c403a9 4830 struct nfs_setaclres res;
4b580ee3
BF		 4831 struct rpc_message msg = {
4832 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4833 .rpc_argp = &arg,
73c403a9 4834 .rpc_resp = &res,
4b580ee3 4835 };
21f498c2 4836 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4837 int ret, i;
4b580ee3
BF		 4838
4839 if (!nfs4_server_supports_acls(server))
4840 return -EOPNOTSUPP;
21f498c2
TM		 4841 if (npages > ARRAY_SIZE(pages))
4842 return -ERANGE;
8fbcf237 4843 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
e9e3d724
NH		 4844 if (i < 0)
4845 return i;
57ec14c5 4846 nfs4_inode_return_delegation(inode);
7c513058 4847 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4848
4849 /*
4850 * Free each page after tx, so the only ref left is
4851 * held by the network stack
4852 */
4853 for (; i > 0; i--)
4854 put_page(pages[i-1]);
4855
08a22b39
AK		 4856 /*
4857 * Acl update can result in inode attribute update.
4858 * so mark the attribute cache invalid.
4859 */
4860 spin_lock(&inode->i_lock);
4861 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4862 spin_unlock(&inode->i_lock);
f41f7418
TM		 4863 nfs_access_zap_cache(inode);
4864 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4865 return ret;
4866}
4867
16b4289c
TM		 4868static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4869{
4870 struct nfs4_exception exception = { };
4871 int err;
4872 do {
c1578b76
TM		 4873 err = __nfs4_proc_set_acl(inode, buf, buflen);
4874 trace_nfs4_set_acl(inode, err);
4875 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4876 &exception);
4877 } while (exception.retry);
4878 return err;
4879}
4880
aa9c2669
DQ		 4881#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4882static int _nfs4_get_security_label(struct inode *inode, void *buf,
4883 size_t buflen)
4884{
4885 struct nfs_server *server = NFS_SERVER(inode);
4886 struct nfs_fattr fattr;
4887 struct nfs4_label label = {0, 0, buflen, buf};
4888
4889 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4890 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4891 .fh = NFS_FH(inode),
4892 .bitmask = bitmask,
4893 };
4894 struct nfs4_getattr_res res = {
4895 .fattr = &fattr,
4896 .label = &label,
4897 .server = server,
4898 };
4899 struct rpc_message msg = {
4900 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4901 .rpc_argp = &arg,
aa9c2669
DQ		 4902 .rpc_resp = &res,
4903 };
4904 int ret;
4905
4906 nfs_fattr_init(&fattr);
4907
fcb63a9b 4908 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4909 if (ret)
4910 return ret;
4911 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4912 return -ENOENT;
4913 if (buflen < label.len)
4914 return -ERANGE;
4915 return 0;
4916}
4917
4918static int nfs4_get_security_label(struct inode *inode, void *buf,
4919 size_t buflen)
4920{
4921 struct nfs4_exception exception = { };
4922 int err;
4923
4924 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4925 return -EOPNOTSUPP;
4926
4927 do {
c1578b76
TM		 4928 err = _nfs4_get_security_label(inode, buf, buflen);
4929 trace_nfs4_get_security_label(inode, err);
4930 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4931 &exception);
4932 } while (exception.retry);
4933 return err;
4934}
4935
4936static int _nfs4_do_set_security_label(struct inode *inode,
4937 struct nfs4_label *ilabel,
4938 struct nfs_fattr *fattr,
4939 struct nfs4_label *olabel)
4940{
4941
4942 struct iattr sattr = {0};
4943 struct nfs_server *server = NFS_SERVER(inode);
4944 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4945 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4946 .fh = NFS_FH(inode),
4947 .iap = &sattr,
4948 .server = server,
4949 .bitmask = bitmask,
4950 .label = ilabel,
4951 };
4952 struct nfs_setattrres res = {
4953 .fattr = fattr,
4954 .label = olabel,
4955 .server = server,
4956 };
4957 struct rpc_message msg = {
4958 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4959 .rpc_argp = &arg,
aa9c2669
DQ		 4960 .rpc_resp = &res,
4961 };
4962 int status;
4963
12207f69 4964 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4965
12207f69 4966 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4967 if (status)
4968 dprintk("%s failed: %d\n", __func__, status);
4969
4970 return status;
4971}
4972
4973static int nfs4_do_set_security_label(struct inode *inode,
4974 struct nfs4_label *ilabel,
4975 struct nfs_fattr *fattr,
4976 struct nfs4_label *olabel)
4977{
4978 struct nfs4_exception exception = { };
4979 int err;
4980
4981 do {
c1578b76
TM		 4982 err = _nfs4_do_set_security_label(inode, ilabel,
4983 fattr, olabel);
4984 trace_nfs4_set_security_label(inode, err);
4985 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4986 &exception);
4987 } while (exception.retry);
4988 return err;
4989}
4990
4991static int
4992nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4993{
4994 struct nfs4_label ilabel, *olabel = NULL;
4995 struct nfs_fattr fattr;
4996 struct rpc_cred *cred;
2b0143b5 4997 struct inode *inode = d_inode(dentry);
aa9c2669
DQ		 4998 int status;
4999
5000 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
5001 return -EOPNOTSUPP;
5002
5003 nfs_fattr_init(&fattr);
5004
5005 ilabel.pi = 0;
5006 ilabel.lfs = 0;
5007 ilabel.label = (char *)buf;
5008 ilabel.len = buflen;
5009
5010 cred = rpc_lookup_cred();
5011 if (IS_ERR(cred))
5012 return PTR_ERR(cred);
5013
5014 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5015 if (IS_ERR(olabel)) {
5016 status = -PTR_ERR(olabel);
5017 goto out;
5018 }
5019
5020 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5021 if (status == 0)
5022 nfs_setsecurity(inode, &fattr, olabel);
5023
5024 nfs4_label_free(olabel);
5025out:
5026 put_rpccred(cred);
5027 return status;
5028}
5029#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5030
5031
f092075d
CL		 5032static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5033 nfs4_verifier *bootverf)
cd93710e
CL		 5034{
5035 __be32 verf[2];
5036
2c820d9a
CL		 5037 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5038 /* An impossible timestamp guarantees this value
5039 * will never match a generated boot time. */
5040 verf[0] = 0;
17f26b12 5041 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 5042 } else {
f092075d 5043 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 5044 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
5045 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 5046 }
cd93710e
CL		 5047 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5048}
5049
a3192688
JL		 5050static int
5051nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 5052{
a3192688
JL		 5053 size_t len;
5054 char *str;
e984a55a 5055
ceb3a16c 5056 if (clp->cl_owner_id != NULL)
a3192688 5057 return 0;
4a3e5779 5058
a3192688 5059 rcu_read_lock();
4a70316c 5060 len = 14 + strlen(clp->cl_ipaddr) + 1 +
a3192688
JL		 5061 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5062 1 +
5063 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5064 1;
5065 rcu_read_unlock();
5066
5067 if (len > NFS4_OPAQUE_LIMIT + 1)
5068 return -EINVAL;
5069
5070 /*
5071 * Since this string is allocated at mount time, and held until the
5072 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5073 * about a memory-reclaim deadlock.
5074 */
5075 str = kmalloc(len, GFP_KERNEL);
5076 if (!str)
5077 return -ENOMEM;
ceb3a16c 5078
e984a55a 5079 rcu_read_lock();
f2dd436e 5080 scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
a3192688
JL		 5081 clp->cl_ipaddr,
5082 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5083 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5084 rcu_read_unlock();
a3192688 5085
a3192688
JL		 5086 clp->cl_owner_id = str;
5087 return 0;
e984a55a
CL		 5088}
5089
873e3851
JL		 5090static int
5091nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5092{
873e3851
JL		 5093 size_t len;
5094 char *str;
5095
5096 len = 10 + 10 + 1 + 10 + 1 +
5097 strlen(nfs4_client_id_uniquifier) + 1 +
5098 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5099
5100 if (len > NFS4_OPAQUE_LIMIT + 1)
5101 return -EINVAL;
5102
5103 /*
5104 * Since this string is allocated at mount time, and held until the
5105 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5106 * about a memory-reclaim deadlock.
5107 */
5108 str = kmalloc(len, GFP_KERNEL);
5109 if (!str)
5110 return -ENOMEM;
5111
f2dd436e 5112 scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
873e3851
JL		 5113 clp->rpc_ops->version, clp->cl_minorversion,
5114 nfs4_client_id_uniquifier,
5115 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5116 clp->cl_owner_id = str;
5117 return 0;
5118}
5119
5120static int
5121nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5122{
873e3851
JL		 5123 size_t len;
5124 char *str;
ceb3a16c
TM		 5125
5126 if (clp->cl_owner_id != NULL)
873e3851 5127 return 0;
6f2ea7f2
CL		 5128
5129 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5130 return nfs4_init_uniquifier_client_string(clp);
5131
5132 len = 10 + 10 + 1 + 10 + 1 +
5133 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5134
5135 if (len > NFS4_OPAQUE_LIMIT + 1)
5136 return -EINVAL;
5137
5138 /*
5139 * Since this string is allocated at mount time, and held until the
5140 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5141 * about a memory-reclaim deadlock.
5142 */
5143 str = kmalloc(len, GFP_KERNEL);
5144 if (!str)
5145 return -ENOMEM;
5146
f2dd436e 5147 scnprintf(str, len, "Linux NFSv%u.%u %s",
873e3851
JL		 5148 clp->rpc_ops->version, clp->cl_minorversion,
5149 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5150 clp->cl_owner_id = str;
5151 return 0;
e984a55a
CL		 5152}
5153
706cb8db
CL		 5154/*
5155 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5156 * services. Advertise one based on the address family of the
5157 * clientaddr.
5158 */
5159static unsigned int
5160nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5161{
5162 if (strchr(clp->cl_ipaddr, ':') != NULL)
5163 return scnprintf(buf, len, "tcp6");
5164 else
5165 return scnprintf(buf, len, "tcp");
5166}
5167
f11b2a1c
JL		 5168static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5169{
5170 struct nfs4_setclientid *sc = calldata;
5171
5172 if (task->tk_status == 0)
5173 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5174}
5175
5176static const struct rpc_call_ops nfs4_setclientid_ops = {
5177 .rpc_call_done = nfs4_setclientid_done,
5178};
5179
6bbb4ae8
CL		 5180/**
5181 * nfs4_proc_setclientid - Negotiate client ID
5182 * @clp: state data structure
5183 * @program: RPC program for NFSv4 callback service
5184 * @port: IP port number for NFS4 callback service
5185 * @cred: RPC credential to use for this call
5186 * @res: where to place the result
5187 *
5188 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5189 */
bb8b27e5
TM		 5190int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5191 unsigned short port, struct rpc_cred *cred,
5192 struct nfs4_setclientid_res *res)
1da177e4
LT		 5193{
5194 nfs4_verifier sc_verifier;
5195 struct nfs4_setclientid setclientid = {
5196 .sc_verifier = &sc_verifier,
5197 .sc_prog = program,
3a6bb738 5198 .sc_clnt = clp,
1da177e4
LT		 5199 };
5200 struct rpc_message msg = {
5201 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5202 .rpc_argp = &setclientid,
bb8b27e5 5203 .rpc_resp = res,
286d7d6a 5204 .rpc_cred = cred,
1da177e4 5205 };
f11b2a1c
JL		 5206 struct rpc_task *task;
5207 struct rpc_task_setup task_setup_data = {
5208 .rpc_client = clp->cl_rpcclient,
5209 .rpc_message = &msg,
5210 .callback_ops = &nfs4_setclientid_ops,
5211 .callback_data = &setclientid,
5212 .flags = RPC_TASK_TIMEOUT,
5213 };
6bbb4ae8 5214 int status;
1da177e4 5215
de734831 5216 /* nfs_client_id4 */
f092075d 5217 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5218
5219 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5220 status = nfs4_init_uniform_client_string(clp);
5221 else
a3192688 5222 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5223
5224 if (status)
5225 goto out;
3a6bb738 5226
de734831 5227 /* cb_client4 */
706cb8db
CL		 5228 setclientid.sc_netid_len =
5229 nfs4_init_callback_netid(clp,
5230 setclientid.sc_netid,
5231 sizeof(setclientid.sc_netid));
de734831 5232 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5233 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5234 clp->cl_ipaddr, port >> 8, port & 255);
5235
3a6bb738 5236 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5237 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5238 clp->cl_owner_id);
f11b2a1c
JL		 5239 task = rpc_run_task(&task_setup_data);
5240 if (IS_ERR(task)) {
5241 status = PTR_ERR(task);
5242 goto out;
5243 }
5244 status = task->tk_status;
5245 if (setclientid.sc_cred) {
5246 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5247 put_rpccred(setclientid.sc_cred);
5248 }
5249 rpc_put_task(task);
5250out:
c6d01c6f 5251 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5252 dprintk("NFS reply setclientid: %d\n", status);
5253 return status;
1da177e4
LT		 5254}
5255
6bbb4ae8
CL		 5256/**
5257 * nfs4_proc_setclientid_confirm - Confirm client ID
5258 * @clp: state data structure
5259 * @res: result of a previous SETCLIENTID
5260 * @cred: RPC credential to use for this call
5261 *
5262 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5263 */
fd954ae1 5264int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5265 struct nfs4_setclientid_res *arg,
5266 struct rpc_cred *cred)
1da177e4 5267{
1da177e4
LT		 5268 struct rpc_message msg = {
5269 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5270 .rpc_argp = arg,
286d7d6a 5271 .rpc_cred = cred,
1da177e4 5272 };
1da177e4
LT		 5273 int status;
5274
6bbb4ae8
CL		 5275 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5276 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5277 clp->cl_clientid);
1bd714f2 5278 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5279 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5280 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5281 return status;
5282}
5283
fe650407
TM		 5284struct nfs4_delegreturndata {
5285 struct nfs4_delegreturnargs args;
fa178f29 5286 struct nfs4_delegreturnres res;
fe650407
TM		 5287 struct nfs_fh fh;
5288 nfs4_stateid stateid;
26e976a8 5289 unsigned long timestamp;
fa178f29 5290 struct nfs_fattr fattr;
fe650407 5291 int rpc_status;
039b756a
PT		 5292 struct inode *inode;
5293 bool roc;
5294 u32 roc_barrier;
fe650407
TM		 5295};
5296
fe650407
TM		 5297static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5298{
5299 struct nfs4_delegreturndata *data = calldata;
938e1010 5300
14516c3a
TM		 5301 if (!nfs4_sequence_done(task, &data->res.seq_res))
5302 return;
938e1010 5303
ca8acf8d 5304 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5305 switch (task->tk_status) {
79708861 5306 case 0:
fa178f29 5307 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5308 case -NFS4ERR_ADMIN_REVOKED:
5309 case -NFS4ERR_DELEG_REVOKED:
5310 case -NFS4ERR_BAD_STATEID:
5311 case -NFS4ERR_OLD_STATEID:
5312 case -NFS4ERR_STALE_STATEID:
5313 case -NFS4ERR_EXPIRED:
5314 task->tk_status = 0;
039b756a
PT		 5315 if (data->roc)
5316 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5317 break;
79708861 5318 default:
8478eaa1
N		 5319 if (nfs4_async_handle_error(task, data->res.server,
5320 NULL, NULL) == -EAGAIN) {
d00c5d43 5321 rpc_restart_call_prepare(task);
79708861
RL		 5322 return;
5323 }
5324 }
5325 data->rpc_status = task->tk_status;
fe650407
TM		 5326}
5327
5328static void nfs4_delegreturn_release(void *calldata)
5329{
039b756a 5330 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5331 struct inode *inode = data->inode;
039b756a 5332
ea7c38fe
TM		 5333 if (inode) {
5334 if (data->roc)
5335 pnfs_roc_release(inode);
5336 nfs_iput_and_deactive(inode);
5337 }
fe650407
TM		 5338 kfree(calldata);
5339}
5340
938e1010
AA		 5341static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5342{
5343 struct nfs4_delegreturndata *d_data;
5344
5345 d_data = (struct nfs4_delegreturndata *)data;
5346
500d701f
PT		 5347 if (nfs4_wait_on_layoutreturn(d_data->inode, task))
5348 return;
5349
4ff376fe
TM		 5350 if (d_data->roc)
5351 pnfs_roc_get_barrier(d_data->inode, &d_data->roc_barrier);
039b756a 5352
d9afbd1b
TM		 5353 nfs4_setup_sequence(d_data->res.server,
5354 &d_data->args.seq_args,
5355 &d_data->res.seq_res,
5356 task);
938e1010 5357}
938e1010 5358
c8d149f3 5359static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5360 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5361 .rpc_call_done = nfs4_delegreturn_done,
5362 .rpc_release = nfs4_delegreturn_release,
5363};
5364
e6f81075 5365static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5366{
5367 struct nfs4_delegreturndata *data;
fa178f29 5368 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5369 struct rpc_task *task;
5138fde0
TM		 5370 struct rpc_message msg = {
5371 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5372 .rpc_cred = cred,
5373 };
c970aa85
TM		 5374 struct rpc_task_setup task_setup_data = {
5375 .rpc_client = server->client,
5138fde0 5376 .rpc_message = &msg,
c970aa85
TM		 5377 .callback_ops = &nfs4_delegreturn_ops,
5378 .flags = RPC_TASK_ASYNC,
5379 };
e6f81075 5380 int status = 0;
fe650407 5381
8535b2be 5382 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5383 if (data == NULL)
5384 return -ENOMEM;
a9c92d6b 5385 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5386 data->args.fhandle = &data->fh;
5387 data->args.stateid = &data->stateid;
9e907fec 5388 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5389 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5390 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5391 data->res.fattr = &data->fattr;
5392 data->res.server = server;
5138fde0 5393 nfs_fattr_init(data->res.fattr);
26e976a8 5394 data->timestamp = jiffies;
fe650407 5395 data->rpc_status = 0;
ea7c38fe
TM		 5396 data->inode = nfs_igrab_and_active(inode);
5397 if (data->inode)
5398 data->roc = nfs4_roc(inode);
fe650407 5399
c970aa85 5400 task_setup_data.callback_data = data;
1174dd1f
TM		 5401 msg.rpc_argp = &data->args;
5402 msg.rpc_resp = &data->res;
c970aa85 5403 task = rpc_run_task(&task_setup_data);
7a1218a2 5404 if (IS_ERR(task))
fe650407 5405 return PTR_ERR(task);
e6f81075
TM		 5406 if (!issync)
5407 goto out;
fe650407 5408 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5409 if (status != 0)
5410 goto out;
5411 status = data->rpc_status;
e144cbcc
TM		 5412 if (status == 0)
5413 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5414 else
5415 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5416out:
e6b3c4db 5417 rpc_put_task(task);
fe650407 5418 return status;
1da177e4
LT		 5419}
5420
e6f81075 5421int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5422{
5423 struct nfs_server *server = NFS_SERVER(inode);
5424 struct nfs4_exception exception = { };
5425 int err;
5426 do {
e6f81075 5427 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
48c9579a 5428 trace_nfs4_delegreturn(inode, stateid, err);
1da177e4
LT		 5429 switch (err) {
5430 case -NFS4ERR_STALE_STATEID:
5431 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5432 case 0:
5433 return 0;
5434 }
5435 err = nfs4_handle_exception(server, err, &exception);
5436 } while (exception.retry);
5437 return err;
5438}
5439
5440#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5441#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5442
5443/*
5444 * sleep, with exponential backoff, and retry the LOCK operation.
5445 */
5446static unsigned long
5447nfs4_set_lock_task_retry(unsigned long timeout)
5448{
416ad3c9 5449 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5450 timeout <<= 1;
5451 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5452 return NFS4_LOCK_MAXTIMEOUT;
5453 return timeout;
5454}
5455
1da177e4
LT		 5456static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5457{
5458 struct inode *inode = state->inode;
5459 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5460 struct nfs_client *clp = server->nfs_client;
911d1aaf 5461 struct nfs_lockt_args arg = {
1da177e4 5462 .fh = NFS_FH(inode),
911d1aaf 5463 .fl = request,
1da177e4 5464 };
911d1aaf
TM		 5465 struct nfs_lockt_res res = {
5466 .denied = request,
1da177e4
LT		 5467 };
5468 struct rpc_message msg = {
5469 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5470 .rpc_argp = &arg,
5471 .rpc_resp = &res,
5472 .rpc_cred = state->owner->so_cred,
5473 };
1da177e4
LT		 5474 struct nfs4_lock_state *lsp;
5475 int status;
5476
911d1aaf 5477 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5478 status = nfs4_set_lock_state(state, request);
5479 if (status != 0)
5480 goto out;
5481 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5482 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5483 arg.lock_owner.s_dev = server->s_dev;
7c513058 5484 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5485 switch (status) {
5486 case 0:
5487 request->fl_type = F_UNLCK;
5488 break;
5489 case -NFS4ERR_DENIED:
5490 status = 0;
1da177e4 5491 }
70cc6487 5492 request->fl_ops->fl_release_private(request);
a6f951dd 5493 request->fl_ops = NULL;
8d0a8a9d 5494out:
1da177e4
LT		 5495 return status;
5496}
5497
5498static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5499{
5500 struct nfs4_exception exception = { };
5501 int err;
5502
5503 do {
d1b748a5
TM		 5504 err = _nfs4_proc_getlk(state, cmd, request);
5505 trace_nfs4_get_lock(request, state, cmd, err);
5506 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5507 &exception);
5508 } while (exception.retry);
5509 return err;
5510}
5511
83bfff23 5512static int do_vfs_lock(struct inode *inode, struct file_lock *fl)
1da177e4 5513{
4f656367 5514 return locks_lock_inode_wait(inode, fl);
1da177e4
LT		 5515}
5516
faf5f49c 5517struct nfs4_unlockdata {
911d1aaf
TM		 5518 struct nfs_locku_args arg;
5519 struct nfs_locku_res res;
faf5f49c
TM		 5520 struct nfs4_lock_state *lsp;
5521 struct nfs_open_context *ctx;
911d1aaf 5522 struct file_lock fl;
516285eb 5523 struct nfs_server *server;
26e976a8 5524 unsigned long timestamp;
faf5f49c
TM		 5525};
5526
911d1aaf
TM		 5527static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5528 struct nfs_open_context *ctx,
5529 struct nfs4_lock_state *lsp,
5530 struct nfs_seqid *seqid)
5531{
5532 struct nfs4_unlockdata *p;
5533 struct inode *inode = lsp->ls_state->inode;
5534
8535b2be 5535 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5536 if (p == NULL)
5537 return NULL;
5538 p->arg.fh = NFS_FH(inode);
5539 p->arg.fl = &p->fl;
5540 p->arg.seqid = seqid;
c1d51931 5541 p->res.seqid = seqid;
911d1aaf
TM		 5542 p->lsp = lsp;
5543 atomic_inc(&lsp->ls_count);
5544 /* Ensure we don't close file until we're done freeing locks! */
5545 p->ctx = get_nfs_open_context(ctx);
5546 memcpy(&p->fl, fl, sizeof(p->fl));
5547 p->server = NFS_SERVER(inode);
5548 return p;
5549}
5550
06f814a3 5551static void nfs4_locku_release_calldata(void *data)
faf5f49c 5552{
963d8fe5 5553 struct nfs4_unlockdata *calldata = data;
911d1aaf 5554 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5555 nfs4_put_lock_state(calldata->lsp);
5556 put_nfs_open_context(calldata->ctx);
5557 kfree(calldata);
faf5f49c
TM		 5558}
5559
963d8fe5 5560static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5561{
963d8fe5 5562 struct nfs4_unlockdata *calldata = data;
faf5f49c 5563
14516c3a
TM		 5564 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5565 return;
faf5f49c
TM		 5566 switch (task->tk_status) {
5567 case 0:
26e976a8 5568 renew_lease(calldata->server, calldata->timestamp);
83bfff23 5569 do_vfs_lock(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 5570 if (nfs4_update_lock_stateid(calldata->lsp,
5571 &calldata->res.stateid))
5572 break;
9e33bed5
TM		 5573 case -NFS4ERR_BAD_STATEID:
5574 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5575 case -NFS4ERR_STALE_STATEID:
5576 case -NFS4ERR_EXPIRED:
425c1d4e
TM		 5577 if (!nfs4_stateid_match(&calldata->arg.stateid,
5578 &calldata->lsp->ls_stateid))
5579 rpc_restart_call_prepare(task);
faf5f49c
TM		 5580 break;
5581 default:
8478eaa1
N		 5582 if (nfs4_async_handle_error(task, calldata->server,
5583 NULL, NULL) == -EAGAIN)
d00c5d43 5584 rpc_restart_call_prepare(task);
faf5f49c 5585 }
2b1bc308 5586 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5587}
5588
4ce70ada 5589static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5590{
4ce70ada 5591 struct nfs4_unlockdata *calldata = data;
faf5f49c 5592
911d1aaf 5593 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5594 goto out_wait;
425c1d4e 5595 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5596 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5597 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5598 goto out_no_action;
faf5f49c 5599 }
26e976a8 5600 calldata->timestamp = jiffies;
035168ab 5601 if (nfs4_setup_sequence(calldata->server,
a893693c 5602 &calldata->arg.seq_args,
2240a9e2
TM		 5603 &calldata->res.seq_res,
5604 task) != 0)
5605 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5606 return;
5607out_no_action:
5608 task->tk_action = NULL;
5609out_wait:
5610 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5611}
5612
963d8fe5 5613static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5614 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5615 .rpc_call_done = nfs4_locku_done,
06f814a3 5616 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5617};
5618
a5d16a4d
TM		 5619static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5620 struct nfs_open_context *ctx,
5621 struct nfs4_lock_state *lsp,
5622 struct nfs_seqid *seqid)
5623{
5624 struct nfs4_unlockdata *data;
5138fde0
TM		 5625 struct rpc_message msg = {
5626 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5627 .rpc_cred = ctx->cred,
5628 };
c970aa85
TM		 5629 struct rpc_task_setup task_setup_data = {
5630 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5631 .rpc_message = &msg,
c970aa85 5632 .callback_ops = &nfs4_locku_ops,
101070ca 5633 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5634 .flags = RPC_TASK_ASYNC,
5635 };
a5d16a4d 5636
fa940720
WAA		 5637 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5638 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5639
137d6aca
FF		 5640 /* Ensure this is an unlock - when canceling a lock, the
5641 * canceled lock is passed in, and it won't be an unlock.
5642 */
5643 fl->fl_type = F_UNLCK;
5644
a5d16a4d
TM		 5645 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5646 if (data == NULL) {
5647 nfs_free_seqid(seqid);
5648 return ERR_PTR(-ENOMEM);
5649 }
5650
a9c92d6b 5651 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5652 msg.rpc_argp = &data->arg;
5653 msg.rpc_resp = &data->res;
c970aa85
TM		 5654 task_setup_data.callback_data = data;
5655 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5656}
5657
faf5f49c
TM		 5658static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5659{
65b62a29
TM		 5660 struct inode *inode = state->inode;
5661 struct nfs4_state_owner *sp = state->owner;
5662 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5663 struct nfs_seqid *seqid;
1da177e4 5664 struct nfs4_lock_state *lsp;
06f814a3 5665 struct rpc_task *task;
b4019c0e 5666 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 5667 int status = 0;
536ff0f8 5668 unsigned char fl_flags = request->fl_flags;
faf5f49c 5669
8d0a8a9d 5670 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5671 /* Unlock _before_ we do the RPC call */
5672 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5673 /* Exclude nfs_delegation_claim_locks() */
5674 mutex_lock(&sp->so_delegreturn_mutex);
5675 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 5676 down_read(&nfsi->rwsem);
83bfff23 5677 if (do_vfs_lock(inode, request) == -ENOENT) {
19e03c57 5678 up_read(&nfsi->rwsem);
65b62a29 5679 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5680 goto out;
19e03c57
TM		 5681 }
5682 up_read(&nfsi->rwsem);
65b62a29 5683 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5684 if (status != 0)
9b073574
TM		 5685 goto out;
5686 /* Is this a delegated lock? */
8d0a8a9d 5687 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5688 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5689 goto out;
b4019c0e
TM		 5690 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5691 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5692 status = -ENOMEM;
badc76dd 5693 if (IS_ERR(seqid))
9b073574 5694 goto out;
cd3758e3 5695 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5696 status = PTR_ERR(task);
5697 if (IS_ERR(task))
9b073574 5698 goto out;
a5d16a4d 5699 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5700 rpc_put_task(task);
9b073574 5701out:
536ff0f8 5702 request->fl_flags = fl_flags;
d1b748a5 5703 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5704 return status;
5705}
5706
a5d16a4d
TM		 5707struct nfs4_lockdata {
5708 struct nfs_lock_args arg;
5709 struct nfs_lock_res res;
5710 struct nfs4_lock_state *lsp;
5711 struct nfs_open_context *ctx;
5712 struct file_lock fl;
26e976a8 5713 unsigned long timestamp;
a5d16a4d
TM		 5714 int rpc_status;
5715 int cancelled;
66179efe 5716 struct nfs_server *server;
a5d16a4d
TM		 5717};
5718
5719static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5720 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5721 gfp_t gfp_mask)
1da177e4 5722{
a5d16a4d
TM		 5723 struct nfs4_lockdata *p;
5724 struct inode *inode = lsp->ls_state->inode;
1da177e4 5725 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 5726 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 5727
8535b2be 5728 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5729 if (p == NULL)
5730 return NULL;
5731
5732 p->arg.fh = NFS_FH(inode);
5733 p->arg.fl = &p->fl;
8535b2be 5734 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 5735 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 5736 goto out_free;
b4019c0e
TM		 5737 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5738 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 5739 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 5740 goto out_free_seqid;
7539bbab 5741 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5742 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5743 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5744 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5745 p->lsp = lsp;
66179efe 5746 p->server = server;
a5d16a4d
TM		 5747 atomic_inc(&lsp->ls_count);
5748 p->ctx = get_nfs_open_context(ctx);
feaff8e5 5749 get_file(fl->fl_file);
a5d16a4d
TM		 5750 memcpy(&p->fl, fl, sizeof(p->fl));
5751 return p;
2f74c0a0
TM		 5752out_free_seqid:
5753 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5754out_free:
5755 kfree(p);
5756 return NULL;
5757}
5758
5759static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5760{
5761 struct nfs4_lockdata *data = calldata;
5762 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5763
3110ff80 5764 dprintk("%s: begin!\n", __func__);
2f74c0a0 5765 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5766 goto out_wait;
a5d16a4d 5767 /* Do we need to do an open_to_lock_owner? */
6b447539 5768 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 5769 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5770 goto out_release_lock_seqid;
8fe72bac 5771 }
425c1d4e
TM		 5772 nfs4_stateid_copy(&data->arg.open_stateid,
5773 &state->open_stateid);
a5d16a4d 5774 data->arg.new_lock_owner = 1;
c1d51931 5775 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 5776 } else {
2f74c0a0 5777 data->arg.new_lock_owner = 0;
425c1d4e
TM		 5778 nfs4_stateid_copy(&data->arg.lock_stateid,
5779 &data->lsp->ls_stateid);
5780 }
5d422301
TM		 5781 if (!nfs4_valid_open_stateid(state)) {
5782 data->rpc_status = -EBADF;
5783 task->tk_action = NULL;
5784 goto out_release_open_seqid;
5785 }
26e976a8 5786 data->timestamp = jiffies;
035168ab
TM		 5787 if (nfs4_setup_sequence(data->server,
5788 &data->arg.seq_args,
2240a9e2 5789 &data->res.seq_res,
d9afbd1b 5790 task) == 0)
66179efe 5791 return;
5d422301 5792out_release_open_seqid:
2240a9e2
TM		 5793 nfs_release_seqid(data->arg.open_seqid);
5794out_release_lock_seqid:
5795 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5796out_wait:
5797 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5798 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5799}
5800
a5d16a4d
TM		 5801static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5802{
5803 struct nfs4_lockdata *data = calldata;
39071e6f 5804 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 5805
3110ff80 5806 dprintk("%s: begin!\n", __func__);
a5d16a4d 5807
14516c3a
TM		 5808 if (!nfs4_sequence_done(task, &data->res.seq_res))
5809 return;
66179efe 5810
a5d16a4d 5811 data->rpc_status = task->tk_status;
425c1d4e
TM		 5812 switch (task->tk_status) {
5813 case 0:
2b0143b5 5814 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 5815 data->timestamp);
c69899a1
TM		 5816 if (data->arg.new_lock) {
5817 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
83bfff23 5818 if (do_vfs_lock(lsp->ls_state->inode, &data->fl) < 0) {
c69899a1
TM		 5819 rpc_restart_call_prepare(task);
5820 break;
5821 }
5822 }
39071e6f
TM		 5823 if (data->arg.new_lock_owner != 0) {
5824 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5825 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5826 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5827 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5828 rpc_restart_call_prepare(task);
425c1d4e
TM		 5829 break;
5830 case -NFS4ERR_BAD_STATEID:
5831 case -NFS4ERR_OLD_STATEID:
5832 case -NFS4ERR_STALE_STATEID:
5833 case -NFS4ERR_EXPIRED:
5834 if (data->arg.new_lock_owner != 0) {
5835 if (!nfs4_stateid_match(&data->arg.open_stateid,
5836 &lsp->ls_state->open_stateid))
5837 rpc_restart_call_prepare(task);
5838 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5839 &lsp->ls_stateid))
5840 rpc_restart_call_prepare(task);
a5d16a4d 5841 }
3110ff80 5842 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5843}
5844
5845static void nfs4_lock_release(void *calldata)
5846{
5847 struct nfs4_lockdata *data = calldata;
5848
3110ff80 5849 dprintk("%s: begin!\n", __func__);
2f74c0a0 5850 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5851 if (data->cancelled != 0) {
5852 struct rpc_task *task;
5853 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5854 data->arg.lock_seqid);
5855 if (!IS_ERR(task))
bf294b41 5856 rpc_put_task_async(task);
3110ff80 5857 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5858 } else
5859 nfs_free_seqid(data->arg.lock_seqid);
5860 nfs4_put_lock_state(data->lsp);
5861 put_nfs_open_context(data->ctx);
feaff8e5 5862 fput(data->fl.fl_file);
a5d16a4d 5863 kfree(data);
3110ff80 5864 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5865}
5866
5867static const struct rpc_call_ops nfs4_lock_ops = {
5868 .rpc_call_prepare = nfs4_lock_prepare,
5869 .rpc_call_done = nfs4_lock_done,
5870 .rpc_release = nfs4_lock_release,
5871};
5872
2bee72a6
TM		 5873static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5874{
2bee72a6
TM		 5875 switch (error) {
5876 case -NFS4ERR_ADMIN_REVOKED:
5877 case -NFS4ERR_BAD_STATEID:
ecac799a 5878 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5879 if (new_lock_owner != 0 ||
795a88c9 5880 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5881 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5882 break;
5883 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5884 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5885 case -NFS4ERR_EXPIRED:
5886 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5887 };
5888}
5889
afe6c27c 5890static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5891{
5892 struct nfs4_lockdata *data;
5893 struct rpc_task *task;
5138fde0
TM		 5894 struct rpc_message msg = {
5895 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5896 .rpc_cred = state->owner->so_cred,
5897 };
c970aa85
TM		 5898 struct rpc_task_setup task_setup_data = {
5899 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5900 .rpc_message = &msg,
c970aa85 5901 .callback_ops = &nfs4_lock_ops,
101070ca 5902 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5903 .flags = RPC_TASK_ASYNC,
5904 };
a5d16a4d
TM		 5905 int ret;
5906
3110ff80 5907 dprintk("%s: begin!\n", __func__);
cd3758e3 5908 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5909 fl->fl_u.nfs4_fl.owner,
5910 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5911 if (data == NULL)
5912 return -ENOMEM;
5913 if (IS_SETLKW(cmd))
5914 data->arg.block = 1;
a9c92d6b 5915 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5916 msg.rpc_argp = &data->arg;
5917 msg.rpc_resp = &data->res;
c970aa85 5918 task_setup_data.callback_data = data;
8fe72bac
TM		 5919 if (recovery_type > NFS_LOCK_NEW) {
5920 if (recovery_type == NFS_LOCK_RECLAIM)
5921 data->arg.reclaim = NFS_LOCK_RECLAIM;
5922 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 5923 } else
5924 data->arg.new_lock = 1;
c970aa85 5925 task = rpc_run_task(&task_setup_data);
7a1218a2 5926 if (IS_ERR(task))
a5d16a4d 5927 return PTR_ERR(task);
a5d16a4d
TM		 5928 ret = nfs4_wait_for_completion_rpc_task(task);
5929 if (ret == 0) {
5930 ret = data->rpc_status;
2bee72a6
TM		 5931 if (ret)
5932 nfs4_handle_setlk_error(data->server, data->lsp,
5933 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5934 } else
5935 data->cancelled = 1;
e6b3c4db 5936 rpc_put_task(task);
3110ff80 5937 dprintk("%s: done, ret = %d!\n", __func__, ret);
48c9579a 5938 trace_nfs4_set_lock(fl, state, &data->res.stateid, cmd, ret);
a5d16a4d 5939 return ret;
1da177e4
LT		 5940}
5941
5942static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5943{
202b50dc 5944 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5945 struct nfs4_exception exception = {
5946 .inode = state->inode,
5947 };
202b50dc
TM		 5948 int err;
5949
5950 do {
42a2d13e
TM		 5951 /* Cache the lock if possible... */
5952 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5953 return 0;
afe6c27c 5954 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
168667c4 5955 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5956 break;
5957 nfs4_handle_exception(server, err, &exception);
5958 } while (exception.retry);
5959 return err;
1da177e4
LT		 5960}
5961
5962static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5963{
202b50dc 5964 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5965 struct nfs4_exception exception = {
5966 .inode = state->inode,
5967 };
202b50dc
TM		 5968 int err;
5969
6bfc93ef
TM		 5970 err = nfs4_set_lock_state(state, request);
5971 if (err != 0)
5972 return err;
f6de7a39 5973 if (!recover_lost_locks) {
ef1820f9
N		 5974 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5975 return 0;
5976 }
202b50dc 5977 do {
42a2d13e
TM		 5978 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5979 return 0;
afe6c27c 5980 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
a9ed2e25
TM		 5981 switch (err) {
5982 default:
5983 goto out;
5984 case -NFS4ERR_GRACE:
5985 case -NFS4ERR_DELAY:
5986 nfs4_handle_exception(server, err, &exception);
5987 err = 0;
5988 }
202b50dc 5989 } while (exception.retry);
a9ed2e25 5990out:
202b50dc 5991 return err;
1da177e4
LT		 5992}
5993
f062eb6c 5994#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5995/**
5996 * nfs41_check_expired_locks - possibly free a lock stateid
5997 *
5998 * @state: NFSv4 state for an inode
5999 *
6000 * Returns NFS_OK if recovery for this stateid is now finished.
6001 * Otherwise a negative NFS4ERR value is returned.
6002 */
b01dd1d8 6003static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 6004{
eb64cf96 6005 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 6006 struct nfs4_lock_state *lsp;
f062eb6c
BS		 6007 struct nfs_server *server = NFS_SERVER(state->inode);
6008
b01dd1d8 6009 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 6010 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 6011 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
6012
6013 status = nfs41_test_stateid(server,
6014 &lsp->ls_stateid,
6015 cred);
08cb47fa 6016 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 6017 if (status != NFS_OK) {
3e60ffdd
CL		 6018 /* Free the stateid unless the server
6019 * informs us the stateid is unrecognized. */
89af2739
CL		 6020 if (status != -NFS4ERR_BAD_STATEID)
6021 nfs41_free_stateid(server,
ab7cb0df
TM		 6022 &lsp->ls_stateid,
6023 cred);
795a88c9 6024 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 6025 ret = status;
6026 }
6027 }
6028 };
6029
6030 return ret;
6031}
6032
6033static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6034{
6035 int status = NFS_OK;
6036
6037 if (test_bit(LK_STATE_IN_USE, &state->flags))
6038 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 6039 if (status != NFS_OK)
6040 status = nfs4_lock_expired(state, request);
6041 return status;
f062eb6c
BS		 6042}
6043#endif
6044
1da177e4
LT		 6045static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6046{
19e03c57 6047 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 6048 unsigned char fl_flags = request->fl_flags;
8e469ebd 6049 int status = -ENOLCK;
1da177e4 6050
8e469ebd
TM		 6051 if ((fl_flags & FL_POSIX) &&
6052 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6053 goto out;
6bfc93ef 6054 /* Is this a delegated open? */
6bfc93ef
TM		 6055 status = nfs4_set_lock_state(state, request);
6056 if (status != 0)
6057 goto out;
01c3b861 6058 request->fl_flags |= FL_ACCESS;
83bfff23 6059 status = do_vfs_lock(state->inode, request);
01c3b861
TM		 6060 if (status < 0)
6061 goto out;
19e03c57 6062 down_read(&nfsi->rwsem);
01c3b861 6063 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6064 /* Yes: cache locks! */
01c3b861 6065 /* ...but avoid races with delegation recall... */
19e03c57 6066 request->fl_flags = fl_flags & ~FL_SLEEP;
83bfff23 6067 status = do_vfs_lock(state->inode, request);
c69899a1 6068 up_read(&nfsi->rwsem);
9a99af49 6069 goto out;
9a99af49 6070 }
19e03c57 6071 up_read(&nfsi->rwsem);
c69899a1 6072 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6073out:
6074 request->fl_flags = fl_flags;
1da177e4
LT		 6075 return status;
6076}
6077
6078static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6079{
a1d0b5ee
TM		 6080 struct nfs4_exception exception = {
6081 .state = state,
05ffe24f 6082 .inode = state->inode,
a1d0b5ee 6083 };
1da177e4
LT		 6084 int err;
6085
6086 do {
965b5d67
TM		 6087 err = _nfs4_proc_setlk(state, cmd, request);
6088 if (err == -NFS4ERR_DENIED)
6089 err = -EAGAIN;
1da177e4 6090 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6091 err, &exception);
1da177e4
LT		 6092 } while (exception.retry);
6093 return err;
6094}
6095
6096static int
6097nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6098{
6099 struct nfs_open_context *ctx;
6100 struct nfs4_state *state;
6101 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6102 int status;
6103
6104 /* verify open state */
cd3758e3 6105 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6106 state = ctx->state;
6107
6108 if (request->fl_start < 0 || request->fl_end < 0)
6109 return -EINVAL;
6110
d953126a
TM		 6111 if (IS_GETLK(cmd)) {
6112 if (state != NULL)
6113 return nfs4_proc_getlk(state, F_GETLK, request);
6114 return 0;
6115 }
1da177e4
LT		 6116
6117 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6118 return -EINVAL;
6119
d953126a
TM		 6120 if (request->fl_type == F_UNLCK) {
6121 if (state != NULL)
6122 return nfs4_proc_unlck(state, cmd, request);
6123 return 0;
6124 }
1da177e4 6125
d953126a
TM		 6126 if (state == NULL)
6127 return -ENOLCK;
55725513
TM		 6128 /*
6129 * Don't rely on the VFS having checked the file open mode,
6130 * since it won't do this for flock() locks.
6131 */
f44106e2 6132 switch (request->fl_type) {
55725513
TM		 6133 case F_RDLCK:
6134 if (!(filp->f_mode & FMODE_READ))
6135 return -EBADF;
6136 break;
6137 case F_WRLCK:
6138 if (!(filp->f_mode & FMODE_WRITE))
6139 return -EBADF;
6140 }
6141
1da177e4
LT		 6142 do {
6143 status = nfs4_proc_setlk(state, cmd, request);
6144 if ((status != -EAGAIN) || IS_SETLK(cmd))
6145 break;
6146 timeout = nfs4_set_lock_task_retry(timeout);
6147 status = -ERESTARTSYS;
6148 if (signalled())
6149 break;
6150 } while(status < 0);
1da177e4
LT		 6151 return status;
6152}
6153
db4f2e63 6154int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6155{
6156 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6157 int err;
6158
6159 err = nfs4_set_lock_state(state, fl);
6160 if (err != 0)
db4f2e63 6161 return err;
4a706fa0 6162 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6163 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6164}
6b3b5496 6165
cf470c3e
TM		 6166struct nfs_release_lockowner_data {
6167 struct nfs4_lock_state *lsp;
5ae67c4f 6168 struct nfs_server *server;
cf470c3e 6169 struct nfs_release_lockowner_args args;
b7e63a10 6170 struct nfs_release_lockowner_res res;
60ea6812 6171 unsigned long timestamp;
cf470c3e
TM		 6172};
6173
fbd4bfd1
CL		 6174static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6175{
6176 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6177 struct nfs_server *server = data->server;
cb04ad2a
PT		 6178 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6179 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6180 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6181 data->timestamp = jiffies;
fbd4bfd1
CL		 6182}
6183
6184static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6185{
6186 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6187 struct nfs_server *server = data->server;
6188
b7e63a10 6189 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6190
6191 switch (task->tk_status) {
6192 case 0:
6193 renew_lease(server, data->timestamp);
6194 break;
6195 case -NFS4ERR_STALE_CLIENTID:
6196 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6197 nfs4_schedule_lease_recovery(server->nfs_client);
6198 break;
60ea6812
CL		 6199 case -NFS4ERR_LEASE_MOVED:
6200 case -NFS4ERR_DELAY:
8478eaa1
N		 6201 if (nfs4_async_handle_error(task, server,
6202 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6203 rpc_restart_call_prepare(task);
6204 }
fbd4bfd1
CL		 6205}
6206
d3c7b7cc
TM		 6207static void nfs4_release_lockowner_release(void *calldata)
6208{
cf470c3e 6209 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6210 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6211 kfree(calldata);
6212}
6213
17280175 6214static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6215 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6216 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6217 .rpc_release = nfs4_release_lockowner_release,
6218};
6219
f1cdae87
JL		 6220static void
6221nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6222{
cf470c3e 6223 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6224 struct rpc_message msg = {
6225 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6226 };
6227
6228 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6229 return;
fbd4bfd1 6230
cf470c3e
TM		 6231 data = kmalloc(sizeof(*data), GFP_NOFS);
6232 if (!data)
f1cdae87 6233 return;
cf470c3e 6234 data->lsp = lsp;
5ae67c4f 6235 data->server = server;
cf470c3e
TM		 6236 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6237 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6238 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6239
cf470c3e 6240 msg.rpc_argp = &data->args;
b7e63a10
TM		 6241 msg.rpc_resp = &data->res;
6242 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6243 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6244}
6245
aa1870af
BF		 6246#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6247
d9a82a04
AG		 6248static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
6249 struct dentry *dentry, const char *key,
64c2ce8b 6250 const void *buf, size_t buflen,
d9a82a04 6251 int flags)
6b3b5496 6252{
64c2ce8b
AK		 6253 if (strcmp(key, "") != 0)
6254 return -EINVAL;
4b580ee3 6255
2b0143b5 6256 return nfs4_proc_set_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6257}
6258
d9a82a04
AG		 6259static int nfs4_xattr_get_nfs4_acl(const struct xattr_handler *handler,
6260 struct dentry *dentry, const char *key,
6261 void *buf, size_t buflen)
6b3b5496 6262{
64c2ce8b
AK		 6263 if (strcmp(key, "") != 0)
6264 return -EINVAL;
aa1870af 6265
2b0143b5 6266 return nfs4_proc_get_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6267}
6268
d9a82a04
AG		 6269static size_t nfs4_xattr_list_nfs4_acl(const struct xattr_handler *handler,
6270 struct dentry *dentry, char *list,
64c2ce8b 6271 size_t list_len, const char *name,
d9a82a04 6272 size_t name_len)
6b3b5496 6273{
64c2ce8b 6274 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 6275
2b0143b5 6276 if (!nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))))
096455a2 6277 return 0;
64c2ce8b
AK		 6278
6279 if (list && len <= list_len)
6280 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6281 return len;
6b3b5496
BF		 6282}
6283
c9bccef6
DQ		 6284#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6285static inline int nfs4_server_supports_labels(struct nfs_server *server)
6286{
6287 return server->caps & NFS_CAP_SECURITY_LABEL;
6288}
6289
d9a82a04
AG		 6290static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
6291 struct dentry *dentry, const char *key,
6292 const void *buf, size_t buflen,
6293 int flags)
c9bccef6
DQ		 6294{
6295 if (security_ismaclabel(key))
6296 return nfs4_set_security_label(dentry, buf, buflen);
6297
6298 return -EOPNOTSUPP;
6299}
6300
d9a82a04
AG		 6301static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
6302 struct dentry *dentry, const char *key,
6303 void *buf, size_t buflen)
c9bccef6
DQ		 6304{
6305 if (security_ismaclabel(key))
2b0143b5 6306 return nfs4_get_security_label(d_inode(dentry), buf, buflen);
c9bccef6
DQ		 6307 return -EOPNOTSUPP;
6308}
6309
d9a82a04
AG		 6310static size_t nfs4_xattr_list_nfs4_label(const struct xattr_handler *handler,
6311 struct dentry *dentry, char *list,
6312 size_t list_len, const char *name,
6313 size_t name_len)
c9bccef6
DQ		 6314{
6315 size_t len = 0;
6316
2b0143b5
DH		 6317 if (nfs_server_capable(d_inode(dentry), NFS_CAP_SECURITY_LABEL)) {
6318 len = security_inode_listsecurity(d_inode(dentry), NULL, 0);
c9bccef6 6319 if (list && len <= list_len)
2b0143b5 6320 security_inode_listsecurity(d_inode(dentry), list, len);
c9bccef6
DQ		 6321 }
6322 return len;
6323}
6324
6325static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6326 .prefix = XATTR_SECURITY_PREFIX,
6327 .list = nfs4_xattr_list_nfs4_label,
6328 .get = nfs4_xattr_get_nfs4_label,
6329 .set = nfs4_xattr_set_nfs4_label,
6330};
6331#endif
6332
6333
533eb461
AA		 6334/*
6335 * nfs_fhget will use either the mounted_on_fileid or the fileid
6336 */
69aaaae1
TM		 6337static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6338{
533eb461
AA		 6339 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6340 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6341 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6342 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6343 return;
6344
6345 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6346 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6347 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6348 fattr->nlink = 2;
6349}
6350
f05d147f
BS		 6351static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6352 const struct qstr *name,
6353 struct nfs4_fs_locations *fs_locations,
6354 struct page *page)
683b57b4
TM		 6355{
6356 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6357 u32 bitmask[3] = {
361e624f 6358 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6359 };
6360 struct nfs4_fs_locations_arg args = {
6361 .dir_fh = NFS_FH(dir),
c228fd3a 6362 .name = name,
683b57b4
TM		 6363 .page = page,
6364 .bitmask = bitmask,
6365 };
22958463
BH		 6366 struct nfs4_fs_locations_res res = {
6367 .fs_locations = fs_locations,
6368 };
683b57b4
TM		 6369 struct rpc_message msg = {
6370 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6371 .rpc_argp = &args,
22958463 6372 .rpc_resp = &res,
683b57b4
TM		 6373 };
6374 int status;
6375
3110ff80 6376 dprintk("%s: start\n", __func__);
533eb461
AA		 6377
6378 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6379 * is not supported */
6380 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6381 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6382 else
6383 bitmask[0] |= FATTR4_WORD0_FILEID;
6384
c228fd3a 6385 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6386 fs_locations->server = server;
830b8e33 6387 fs_locations->nlocations = 0;
f05d147f 6388 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6389 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6390 return status;
6391}
6392
f05d147f
BS		 6393int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6394 const struct qstr *name,
6395 struct nfs4_fs_locations *fs_locations,
6396 struct page *page)
db0a9593
BS		 6397{
6398 struct nfs4_exception exception = { };
6399 int err;
6400 do {
078ea3df
TM		 6401 err = _nfs4_proc_fs_locations(client, dir, name,
6402 fs_locations, page);
6403 trace_nfs4_get_fs_locations(dir, name, err);
6404 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6405 &exception);
6406 } while (exception.retry);
6407 return err;
6408}
6409
b03d735b
CL		 6410/*
6411 * This operation also signals the server that this client is
6412 * performing migration recovery. The server can stop returning
6413 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6414 * appended to this compound to identify the client ID which is
6415 * performing recovery.
6416 */
6417static int _nfs40_proc_get_locations(struct inode *inode,
6418 struct nfs4_fs_locations *locations,
6419 struct page *page, struct rpc_cred *cred)
6420{
6421 struct nfs_server *server = NFS_SERVER(inode);
6422 struct rpc_clnt *clnt = server->client;
6423 u32 bitmask[2] = {
6424 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6425 };
6426 struct nfs4_fs_locations_arg args = {
6427 .clientid = server->nfs_client->cl_clientid,
6428 .fh = NFS_FH(inode),
6429 .page = page,
6430 .bitmask = bitmask,
6431 .migration = 1, /* skip LOOKUP */
6432 .renew = 1, /* append RENEW */
6433 };
6434 struct nfs4_fs_locations_res res = {
6435 .fs_locations = locations,
6436 .migration = 1,
6437 .renew = 1,
6438 };
6439 struct rpc_message msg = {
6440 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6441 .rpc_argp = &args,
6442 .rpc_resp = &res,
6443 .rpc_cred = cred,
6444 };
6445 unsigned long now = jiffies;
6446 int status;
6447
6448 nfs_fattr_init(&locations->fattr);
6449 locations->server = server;
6450 locations->nlocations = 0;
6451
6452 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6453 nfs4_set_sequence_privileged(&args.seq_args);
6454 status = nfs4_call_sync_sequence(clnt, server, &msg,
6455 &args.seq_args, &res.seq_res);
6456 if (status)
6457 return status;
6458
6459 renew_lease(server, now);
6460 return 0;
6461}
6462
6463#ifdef CONFIG_NFS_V4_1
6464
6465/*
6466 * This operation also signals the server that this client is
6467 * performing migration recovery. The server can stop asserting
6468 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6469 * performing this operation is identified in the SEQUENCE
6470 * operation in this compound.
6471 *
6472 * When the client supports GETATTR(fs_locations_info), it can
6473 * be plumbed in here.
6474 */
6475static int _nfs41_proc_get_locations(struct inode *inode,
6476 struct nfs4_fs_locations *locations,
6477 struct page *page, struct rpc_cred *cred)
6478{
6479 struct nfs_server *server = NFS_SERVER(inode);
6480 struct rpc_clnt *clnt = server->client;
6481 u32 bitmask[2] = {
6482 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6483 };
6484 struct nfs4_fs_locations_arg args = {
6485 .fh = NFS_FH(inode),
6486 .page = page,
6487 .bitmask = bitmask,
6488 .migration = 1, /* skip LOOKUP */
6489 };
6490 struct nfs4_fs_locations_res res = {
6491 .fs_locations = locations,
6492 .migration = 1,
6493 };
6494 struct rpc_message msg = {
6495 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6496 .rpc_argp = &args,
6497 .rpc_resp = &res,
6498 .rpc_cred = cred,
6499 };
6500 int status;
6501
6502 nfs_fattr_init(&locations->fattr);
6503 locations->server = server;
6504 locations->nlocations = 0;
6505
6506 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6507 nfs4_set_sequence_privileged(&args.seq_args);
6508 status = nfs4_call_sync_sequence(clnt, server, &msg,
6509 &args.seq_args, &res.seq_res);
6510 if (status == NFS4_OK &&
6511 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6512 status = -NFS4ERR_LEASE_MOVED;
6513 return status;
6514}
6515
6516#endif /* CONFIG_NFS_V4_1 */
6517
6518/**
6519 * nfs4_proc_get_locations - discover locations for a migrated FSID
6520 * @inode: inode on FSID that is migrating
6521 * @locations: result of query
6522 * @page: buffer
6523 * @cred: credential to use for this operation
6524 *
6525 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6526 * operation failed, or a negative errno if a local error occurred.
6527 *
6528 * On success, "locations" is filled in, but if the server has
6529 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6530 * asserted.
6531 *
6532 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6533 * from this client that require migration recovery.
6534 */
6535int nfs4_proc_get_locations(struct inode *inode,
6536 struct nfs4_fs_locations *locations,
6537 struct page *page, struct rpc_cred *cred)
6538{
6539 struct nfs_server *server = NFS_SERVER(inode);
6540 struct nfs_client *clp = server->nfs_client;
6541 const struct nfs4_mig_recovery_ops *ops =
6542 clp->cl_mvops->mig_recovery_ops;
6543 struct nfs4_exception exception = { };
6544 int status;
6545
6546 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6547 (unsigned long long)server->fsid.major,
6548 (unsigned long long)server->fsid.minor,
6549 clp->cl_hostname);
6550 nfs_display_fhandle(NFS_FH(inode), __func__);
6551
6552 do {
6553 status = ops->get_locations(inode, locations, page, cred);
6554 if (status != -NFS4ERR_DELAY)
6555 break;
6556 nfs4_handle_exception(server, status, &exception);
6557 } while (exception.retry);
6558 return status;
6559}
6560
44c99933
CL		 6561/*
6562 * This operation also signals the server that this client is
6563 * performing "lease moved" recovery. The server can stop
6564 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6565 * is appended to this compound to identify the client ID which is
6566 * performing recovery.
6567 */
6568static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6569{
6570 struct nfs_server *server = NFS_SERVER(inode);
6571 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6572 struct rpc_clnt *clnt = server->client;
6573 struct nfs4_fsid_present_arg args = {
6574 .fh = NFS_FH(inode),
6575 .clientid = clp->cl_clientid,
6576 .renew = 1, /* append RENEW */
6577 };
6578 struct nfs4_fsid_present_res res = {
6579 .renew = 1,
6580 };
6581 struct rpc_message msg = {
6582 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6583 .rpc_argp = &args,
6584 .rpc_resp = &res,
6585 .rpc_cred = cred,
6586 };
6587 unsigned long now = jiffies;
6588 int status;
6589
6590 res.fh = nfs_alloc_fhandle();
6591 if (res.fh == NULL)
6592 return -ENOMEM;
6593
6594 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6595 nfs4_set_sequence_privileged(&args.seq_args);
6596 status = nfs4_call_sync_sequence(clnt, server, &msg,
6597 &args.seq_args, &res.seq_res);
6598 nfs_free_fhandle(res.fh);
6599 if (status)
6600 return status;
6601
6602 do_renew_lease(clp, now);
6603 return 0;
6604}
6605
6606#ifdef CONFIG_NFS_V4_1
6607
6608/*
6609 * This operation also signals the server that this client is
6610 * performing "lease moved" recovery. The server can stop asserting
6611 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6612 * this operation is identified in the SEQUENCE operation in this
6613 * compound.
6614 */
6615static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6616{
6617 struct nfs_server *server = NFS_SERVER(inode);
6618 struct rpc_clnt *clnt = server->client;
6619 struct nfs4_fsid_present_arg args = {
6620 .fh = NFS_FH(inode),
6621 };
6622 struct nfs4_fsid_present_res res = {
6623 };
6624 struct rpc_message msg = {
6625 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6626 .rpc_argp = &args,
6627 .rpc_resp = &res,
6628 .rpc_cred = cred,
6629 };
6630 int status;
6631
6632 res.fh = nfs_alloc_fhandle();
6633 if (res.fh == NULL)
6634 return -ENOMEM;
6635
6636 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6637 nfs4_set_sequence_privileged(&args.seq_args);
6638 status = nfs4_call_sync_sequence(clnt, server, &msg,
6639 &args.seq_args, &res.seq_res);
6640 nfs_free_fhandle(res.fh);
6641 if (status == NFS4_OK &&
6642 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6643 status = -NFS4ERR_LEASE_MOVED;
6644 return status;
6645}
6646
6647#endif /* CONFIG_NFS_V4_1 */
6648
6649/**
6650 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6651 * @inode: inode on FSID to check
6652 * @cred: credential to use for this operation
6653 *
6654 * Server indicates whether the FSID is present, moved, or not
6655 * recognized. This operation is necessary to clear a LEASE_MOVED
6656 * condition for this client ID.
6657 *
6658 * Returns NFS4_OK if the FSID is present on this server,
6659 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6660 * NFS4ERR code if some error occurred on the server, or a
6661 * negative errno if a local failure occurred.
6662 */
6663int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6664{
6665 struct nfs_server *server = NFS_SERVER(inode);
6666 struct nfs_client *clp = server->nfs_client;
6667 const struct nfs4_mig_recovery_ops *ops =
6668 clp->cl_mvops->mig_recovery_ops;
6669 struct nfs4_exception exception = { };
6670 int status;
6671
6672 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6673 (unsigned long long)server->fsid.major,
6674 (unsigned long long)server->fsid.minor,
6675 clp->cl_hostname);
6676 nfs_display_fhandle(NFS_FH(inode), __func__);
6677
6678 do {
6679 status = ops->fsid_present(inode, cred);
6680 if (status != -NFS4ERR_DELAY)
6681 break;
6682 nfs4_handle_exception(server, status, &exception);
6683 } while (exception.retry);
6684 return status;
6685}
6686
5ec16a85 6687/**
a5250def
WAA		 6688 * If 'use_integrity' is true and the state managment nfs_client
6689 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6690 * and the machine credential as per RFC3530bis and RFC5661 Security
6691 * Considerations sections. Otherwise, just use the user cred with the
6692 * filesystem's rpc_client.
5ec16a85 6693 */
a5250def 6694static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6695{
6696 int status;
6697 struct nfs4_secinfo_arg args = {
6698 .dir_fh = NFS_FH(dir),
6699 .name = name,
6700 };
6701 struct nfs4_secinfo_res res = {
6702 .flavors = flavors,
6703 };
6704 struct rpc_message msg = {
6705 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6706 .rpc_argp = &args,
6707 .rpc_resp = &res,
6708 };
a5250def 6709 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6710 struct rpc_cred *cred = NULL;
a5250def
WAA		 6711
6712 if (use_integrity) {
6713 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6714 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6715 msg.rpc_cred = cred;
a5250def 6716 }
5a5ea0d4
BS		 6717
6718 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6719
6720 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6721 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6722
a5250def
WAA		 6723 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6724 &res.seq_res, 0);
5a5ea0d4 6725 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6726
7cb852df
WAA		 6727 if (cred)
6728 put_rpccred(cred);
a5250def 6729
5a5ea0d4
BS		 6730 return status;
6731}
6732
72de53ec
BS		 6733int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6734 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6735{
6736 struct nfs4_exception exception = { };
6737 int err;
6738 do {
a5250def
WAA		 6739 err = -NFS4ERR_WRONGSEC;
6740
6741 /* try to use integrity protection with machine cred */
6742 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6743 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6744
6745 /*
6746 * if unable to use integrity protection, or SECINFO with
6747 * integrity protection returns NFS4ERR_WRONGSEC (which is
6748 * disallowed by spec, but exists in deployed servers) use
6749 * the current filesystem's rpc_client and the user cred.
6750 */
6751 if (err == -NFS4ERR_WRONGSEC)
6752 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6753
078ea3df
TM		 6754 trace_nfs4_secinfo(dir, name, err);
6755 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6756 &exception);
6757 } while (exception.retry);
6758 return err;
6759}
6760
557134a3 6761#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6762/*
6763 * Check the exchange flags returned by the server for invalid flags, having
6764 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6765 * DS flags set.
6766 */
6767static int nfs4_check_cl_exchange_flags(u32 flags)
6768{
6769 if (flags & ~EXCHGID4_FLAG_MASK_R)
6770 goto out_inval;
6771 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6772 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6773 goto out_inval;
6774 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6775 goto out_inval;
6776 return NFS_OK;
6777out_inval:
6778 return -NFS4ERR_INVAL;
6779}
6780
78fe0f41 6781static bool
79d4e1f0
CL		 6782nfs41_same_server_scope(struct nfs41_server_scope *a,
6783 struct nfs41_server_scope *b)
78fe0f41
WAA		 6784{
6785 if (a->server_scope_sz == b->server_scope_sz &&
6786 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6787 return true;
6788
6789 return false;
6790}
6791
7c44f1ae
WAA		 6792/*
6793 * nfs4_proc_bind_conn_to_session()
6794 *
6795 * The 4.1 client currently uses the same TCP connection for the
6796 * fore and backchannel.
6797 */
2cf047c9 6798int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6799{
6800 int status;
71a097c6
TM		 6801 struct nfs41_bind_conn_to_session_args args = {
6802 .client = clp,
6803 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6804 };
7c44f1ae
WAA		 6805 struct nfs41_bind_conn_to_session_res res;
6806 struct rpc_message msg = {
6807 .rpc_proc =
6808 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 6809 .rpc_argp = &args,
7c44f1ae 6810 .rpc_resp = &res,
2cf047c9 6811 .rpc_cred = cred,
7c44f1ae
WAA		 6812 };
6813
6814 dprintk("--> %s\n", __func__);
7c44f1ae 6815
71a097c6
TM		 6816 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6817 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6818 args.dir = NFS4_CDFC4_FORE;
7c44f1ae
WAA		 6819
6820 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6821 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 6822 if (status == 0) {
71a097c6 6823 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 6824 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6825 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6826 status = -EIO;
71a097c6 6827 goto out;
7c44f1ae 6828 }
71a097c6 6829 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 6830 dprintk("NFS: %s: Unexpected direction from server\n",
6831 __func__);
6832 status = -EIO;
71a097c6 6833 goto out;
7c44f1ae 6834 }
71a097c6 6835 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 6836 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6837 __func__);
6838 status = -EIO;
71a097c6 6839 goto out;
7c44f1ae
WAA		 6840 }
6841 }
7c44f1ae
WAA		 6842out:
6843 dprintk("<-- %s status= %d\n", __func__, status);
6844 return status;
6845}
6846
99fe60d0 6847/*
fa940720
WAA		 6848 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6849 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6850 */
6851static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6852 .how = SP4_MACH_CRED,
6853 .enforce.u.words = {
6854 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6855 1 << (OP_EXCHANGE_ID - 32) |
6856 1 << (OP_CREATE_SESSION - 32) |
6857 1 << (OP_DESTROY_SESSION - 32) |
6858 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6859 },
6860 .allow.u.words = {
6861 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6862 1 << (OP_LOCKU) |
6863 1 << (OP_COMMIT),
8b5bee2e 6864 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6865 1 << (OP_SECINFO_NO_NAME - 32) |
6866 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6867 1 << (OP_FREE_STATEID - 32) |
6868 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6869 }
6870};
6871
6872/*
6873 * Select the state protection mode for client `clp' given the server results
6874 * from exchange_id in `sp'.
99fe60d0 6875 *
2031cd1a
WAA		 6876 * Returns 0 on success, negative errno otherwise.
6877 */
6878static int nfs4_sp4_select_mode(struct nfs_client *clp,
6879 struct nfs41_state_protection *sp)
6880{
6881 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6882 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6883 1 << (OP_EXCHANGE_ID - 32) |
6884 1 << (OP_CREATE_SESSION - 32) |
6885 1 << (OP_DESTROY_SESSION - 32) |
6886 1 << (OP_DESTROY_CLIENTID - 32)
6887 };
6888 unsigned int i;
6889
6890 if (sp->how == SP4_MACH_CRED) {
6891 /* Print state protect result */
6892 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6893 for (i = 0; i <= LAST_NFS4_OP; i++) {
6894 if (test_bit(i, sp->enforce.u.longs))
6895 dfprintk(MOUNT, " enforce op %d\n", i);
6896 if (test_bit(i, sp->allow.u.longs))
6897 dfprintk(MOUNT, " allow op %d\n", i);
6898 }
6899
6900 /* make sure nothing is on enforce list that isn't supported */
6901 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6902 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6903 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6904 return -EINVAL;
6905 }
6906 }
6907
6908 /*
6909 * Minimal mode - state operations are allowed to use machine
6910 * credential. Note this already happens by default, so the
6911 * client doesn't have to do anything more than the negotiation.
6912 *
6913 * NOTE: we don't care if EXCHANGE_ID is in the list -
6914 * we're already using the machine cred for exchange_id
6915 * and will never use a different cred.
6916 */
6917 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6918 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6919 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6920 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6921 dfprintk(MOUNT, "sp4_mach_cred:\n");
6922 dfprintk(MOUNT, " minimal mode enabled\n");
6923 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6924 } else {
6925 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6926 return -EINVAL;
6927 }
fa940720
WAA		 6928
6929 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6930 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6931 dfprintk(MOUNT, " cleanup mode enabled\n");
6932 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6933 }
8b5bee2e
WAA		 6934
6935 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6936 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6937 dfprintk(MOUNT, " secinfo mode enabled\n");
6938 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6939 }
3787d506
WAA		 6940
6941 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6942 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6943 dfprintk(MOUNT, " stateid mode enabled\n");
6944 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6945 }
8c21c62c
WAA		 6946
6947 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6948 dfprintk(MOUNT, " write mode enabled\n");
6949 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6950 }
6951
6952 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6953 dfprintk(MOUNT, " commit mode enabled\n");
6954 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6955 }
2031cd1a
WAA		 6956 }
6957
6958 return 0;
6959}
6960
6961/*
6962 * _nfs4_proc_exchange_id()
6bbb4ae8 6963 *
2031cd1a 6964 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6965 */
2031cd1a
WAA		 6966static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6967 u32 sp4_how)
99fe60d0
BH		 6968{
6969 nfs4_verifier verifier;
6970 struct nfs41_exchange_id_args args = {
cd93710e 6971 .verifier = &verifier,
99fe60d0 6972 .client = clp,
cd3fadec 6973#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6974 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6975 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6976 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6977#else
6978 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6979 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6980#endif
99fe60d0
BH		 6981 };
6982 struct nfs41_exchange_id_res res = {
32b01310 6983 0
99fe60d0
BH		 6984 };
6985 int status;
6986 struct rpc_message msg = {
6987 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6988 .rpc_argp = &args,
6989 .rpc_resp = &res,
6990 .rpc_cred = cred,
6991 };
99fe60d0 6992
f092075d 6993 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 6994
6995 status = nfs4_init_uniform_client_string(clp);
6996 if (status)
3a6bb738 6997 goto out;
3a6bb738
JL		 6998
6999 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6bbb4ae8 7000 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 7001 clp->cl_owner_id);
99fe60d0 7002
acdeb69d 7003 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 7004 GFP_NOFS);
acdeb69d 7005 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 7006 status = -ENOMEM;
7007 goto out;
7008 }
78fe0f41 7009
79d4e1f0 7010 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 7011 GFP_NOFS);
177313f1 7012 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 7013 status = -ENOMEM;
acdeb69d 7014 goto out_server_owner;
abe9a6d5 7015 }
78fe0f41 7016
bbafffd2 7017 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 7018 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 7019 status = -ENOMEM;
7020 goto out_server_scope;
7021 }
7022
2031cd1a
WAA		 7023 switch (sp4_how) {
7024 case SP4_NONE:
7025 args.state_protect.how = SP4_NONE;
7026 break;
7027
7028 case SP4_MACH_CRED:
7029 args.state_protect = nfs4_sp4_mach_cred_request;
7030 break;
7031
7032 default:
7033 /* unsupported! */
7034 WARN_ON_ONCE(1);
7035 status = -EINVAL;
6b55970b 7036 goto out_impl_id;
2031cd1a
WAA		 7037 }
7038
1bd714f2 7039 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7040 trace_nfs4_exchange_id(clp, status);
177313f1 7041 if (status == 0)
32b01310 7042 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 7043
2031cd1a
WAA		 7044 if (status == 0)
7045 status = nfs4_sp4_select_mode(clp, &res.state_protect);
7046
acdeb69d 7047 if (status == 0) {
32b01310 7048 clp->cl_clientid = res.clientid;
e11259f9
TM		 7049 clp->cl_exchange_flags = res.flags;
7050 /* Client ID is not confirmed */
7051 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7052 clear_bit(NFS4_SESSION_ESTABLISHED,
7053 &clp->cl_session->session_state);
32b01310 7054 clp->cl_seqid = res.seqid;
e11259f9 7055 }
32b01310 7056
acdeb69d
CL		 7057 kfree(clp->cl_serverowner);
7058 clp->cl_serverowner = res.server_owner;
7059 res.server_owner = NULL;
78fe0f41 7060
7d2ed9ac 7061 /* use the most recent implementation id */
59155546
CL		 7062 kfree(clp->cl_implid);
7063 clp->cl_implid = res.impl_id;
6b55970b 7064 res.impl_id = NULL;
7d2ed9ac 7065
177313f1 7066 if (clp->cl_serverscope != NULL &&
79d4e1f0 7067 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 7068 res.server_scope)) {
7069 dprintk("%s: server_scope mismatch detected\n",
7070 __func__);
7071 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 7072 kfree(clp->cl_serverscope);
7073 clp->cl_serverscope = NULL;
78fe0f41
WAA		 7074 }
7075
177313f1 7076 if (clp->cl_serverscope == NULL) {
79d4e1f0 7077 clp->cl_serverscope = res.server_scope;
6b55970b 7078 res.server_scope = NULL;
abe9a6d5 7079 }
6b55970b 7080 }
7d2ed9ac 7081
6b55970b
KM		 7082out_impl_id:
7083 kfree(res.impl_id);
7d2ed9ac 7084out_server_scope:
abe9a6d5 7085 kfree(res.server_scope);
6b55970b
KM		 7086out_server_owner:
7087 kfree(res.server_owner);
abe9a6d5 7088out:
177313f1 7089 if (clp->cl_implid != NULL)
6bbb4ae8 7090 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 7091 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 7092 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 7093 clp->cl_implid->date.seconds,
7094 clp->cl_implid->date.nseconds);
6bbb4ae8 7095 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 7096 return status;
7097}
7098
2031cd1a
WAA		 7099/*
7100 * nfs4_proc_exchange_id()
7101 *
7102 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7103 *
7104 * Since the clientid has expired, all compounds using sessions
7105 * associated with the stale clientid will be returning
7106 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7107 * be in some phase of session reset.
7108 *
7109 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7110 */
7111int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7112{
7113 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7114 int status;
7115
7116 /* try SP4_MACH_CRED if krb5i/p */
7117 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7118 authflavor == RPC_AUTH_GSS_KRB5P) {
7119 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
7120 if (!status)
7121 return 0;
7122 }
7123
7124 /* try SP4_NONE */
7125 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
7126}
7127
66245539
TM		 7128static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7129 struct rpc_cred *cred)
7130{
7131 struct rpc_message msg = {
7132 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7133 .rpc_argp = clp,
7134 .rpc_cred = cred,
7135 };
7136 int status;
7137
7138 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7139 trace_nfs4_destroy_clientid(clp, status);
66245539 7140 if (status)
02c67525 7141 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7142 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7143 return status;
7144}
7145
7146static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7147 struct rpc_cred *cred)
7148{
7149 unsigned int loop;
7150 int ret;
7151
7152 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7153 ret = _nfs4_proc_destroy_clientid(clp, cred);
7154 switch (ret) {
7155 case -NFS4ERR_DELAY:
7156 case -NFS4ERR_CLIENTID_BUSY:
7157 ssleep(1);
7158 break;
7159 default:
7160 return ret;
7161 }
7162 }
7163 return 0;
7164}
7165
7166int nfs4_destroy_clientid(struct nfs_client *clp)
7167{
7168 struct rpc_cred *cred;
7169 int ret = 0;
7170
7171 if (clp->cl_mvops->minor_version < 1)
7172 goto out;
7173 if (clp->cl_exchange_flags == 0)
7174 goto out;
05f4c350
CL		 7175 if (clp->cl_preserve_clid)
7176 goto out;
73d8bde5 7177 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7178 ret = nfs4_proc_destroy_clientid(clp, cred);
7179 if (cred)
7180 put_rpccred(cred);
7181 switch (ret) {
7182 case 0:
7183 case -NFS4ERR_STALE_CLIENTID:
7184 clp->cl_exchange_flags = 0;
7185 }
7186out:
7187 return ret;
7188}
7189
2050f0cc
AA		 7190struct nfs4_get_lease_time_data {
7191 struct nfs4_get_lease_time_args *args;
7192 struct nfs4_get_lease_time_res *res;
7193 struct nfs_client *clp;
7194};
7195
7196static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7197 void *calldata)
7198{
2050f0cc
AA		 7199 struct nfs4_get_lease_time_data *data =
7200 (struct nfs4_get_lease_time_data *)calldata;
7201
7202 dprintk("--> %s\n", __func__);
7203 /* just setup sequence, do not trigger session recovery
7204 since we're invoked within one */
d9afbd1b
TM		 7205 nfs41_setup_sequence(data->clp->cl_session,
7206 &data->args->la_seq_args,
7207 &data->res->lr_seq_res,
7208 task);
2050f0cc
AA		 7209 dprintk("<-- %s\n", __func__);
7210}
7211
7212/*
7213 * Called from nfs4_state_manager thread for session setup, so don't recover
7214 * from sequence operation or clientid errors.
7215 */
7216static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7217{
7218 struct nfs4_get_lease_time_data *data =
7219 (struct nfs4_get_lease_time_data *)calldata;
7220
7221 dprintk("--> %s\n", __func__);
14516c3a
TM		 7222 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7223 return;
2050f0cc
AA		 7224 switch (task->tk_status) {
7225 case -NFS4ERR_DELAY:
7226 case -NFS4ERR_GRACE:
7227 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7228 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7229 task->tk_status = 0;
a8a4ae3a
AA		 7230 /* fall through */
7231 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7232 rpc_restart_call_prepare(task);
2050f0cc
AA		 7233 return;
7234 }
2050f0cc
AA		 7235 dprintk("<-- %s\n", __func__);
7236}
7237
17280175 7238static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7239 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7240 .rpc_call_done = nfs4_get_lease_time_done,
7241};
7242
7243int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7244{
7245 struct rpc_task *task;
7246 struct nfs4_get_lease_time_args args;
7247 struct nfs4_get_lease_time_res res = {
7248 .lr_fsinfo = fsinfo,
7249 };
7250 struct nfs4_get_lease_time_data data = {
7251 .args = &args,
7252 .res = &res,
7253 .clp = clp,
7254 };
7255 struct rpc_message msg = {
7256 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7257 .rpc_argp = &args,
7258 .rpc_resp = &res,
7259 };
7260 struct rpc_task_setup task_setup = {
7261 .rpc_client = clp->cl_rpcclient,
7262 .rpc_message = &msg,
7263 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7264 .callback_data = &data,
7265 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7266 };
7267 int status;
7268
a9c92d6b 7269 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7270 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7271 dprintk("--> %s\n", __func__);
7272 task = rpc_run_task(&task_setup);
7273
7274 if (IS_ERR(task))
7275 status = PTR_ERR(task);
7276 else {
7277 status = task->tk_status;
7278 rpc_put_task(task);
7279 }
7280 dprintk("<-- %s return %d\n", __func__, status);
7281
7282 return status;
7283}
7284
fc931582
AA		 7285/*
7286 * Initialize the values to be used by the client in CREATE_SESSION
7287 * If nfs4_init_session set the fore channel request and response sizes,
7288 * use them.
7289 *
7290 * Set the back channel max_resp_sz_cached to zero to force the client to
7291 * always set csa_cachethis to FALSE because the current implementation
7292 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7293 */
7294static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7295{
18aad3d5
AA		 7296 unsigned int max_rqst_sz, max_resp_sz;
7297
7298 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7299 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7300
fc931582 7301 /* Fore channel attributes */
18aad3d5
AA		 7302 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7303 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7304 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7305 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7306
7307 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7308 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7309 __func__,
7310 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7311 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7312
7313 /* Back channel attributes */
fc931582
AA		 7314 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7315 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7316 args->bc_attrs.max_resp_sz_cached = 0;
7317 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7318 args->bc_attrs.max_reqs = 1;
7319
7320 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7321 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7322 __func__,
7323 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7324 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7325 args->bc_attrs.max_reqs);
7326}
7327
79969dd1
TM		 7328static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7329 struct nfs41_create_session_res *res)
8d35301d 7330{
43c2e885 7331 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7332 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7333
43c2e885
BF		 7334 if (rcvd->max_resp_sz > sent->max_resp_sz)
7335 return -EINVAL;
7336 /*
7337 * Our requested max_ops is the minimum we need; we're not
7338 * prepared to break up compounds into smaller pieces than that.
7339 * So, no point even trying to continue if the server won't
7340 * cooperate:
7341 */
7342 if (rcvd->max_ops < sent->max_ops)
7343 return -EINVAL;
7344 if (rcvd->max_reqs == 0)
7345 return -EINVAL;
b4b9a0c1
VG		 7346 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7347 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7348 return 0;
8d35301d
AA		 7349}
7350
79969dd1
TM		 7351static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7352 struct nfs41_create_session_res *res)
43c2e885
BF		 7353{
7354 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7355 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7356
b1c0df5f
TM		 7357 if (!(res->flags & SESSION4_BACK_CHAN))
7358 goto out;
43c2e885
BF		 7359 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7360 return -EINVAL;
7361 if (rcvd->max_resp_sz < sent->max_resp_sz)
7362 return -EINVAL;
7363 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7364 return -EINVAL;
7365 /* These would render the backchannel useless: */
b4b9a0c1 7366 if (rcvd->max_ops != sent->max_ops)
43c2e885 7367 return -EINVAL;
b4b9a0c1 7368 if (rcvd->max_reqs != sent->max_reqs)
43c2e885 7369 return -EINVAL;
b1c0df5f 7370out:
43c2e885
BF		 7371 return 0;
7372}
8d35301d 7373
8d35301d 7374static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7375 struct nfs41_create_session_res *res)
8d35301d 7376{
43c2e885 7377 int ret;
8d35301d 7378
79969dd1 7379 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7380 if (ret)
7381 return ret;
79969dd1
TM		 7382 return nfs4_verify_back_channel_attrs(args, res);
7383}
7384
7385static void nfs4_update_session(struct nfs4_session *session,
7386 struct nfs41_create_session_res *res)
7387{
7388 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7389 /* Mark client id and session as being confirmed */
7390 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7391 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7392 session->flags = res->flags;
7393 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7394 if (res->flags & SESSION4_BACK_CHAN)
7395 memcpy(&session->bc_attrs, &res->bc_attrs,
7396 sizeof(session->bc_attrs));
8d35301d
AA		 7397}
7398
848f5bda
TM		 7399static int _nfs4_proc_create_session(struct nfs_client *clp,
7400 struct rpc_cred *cred)
fc931582
AA		 7401{
7402 struct nfs4_session *session = clp->cl_session;
7403 struct nfs41_create_session_args args = {
7404 .client = clp,
79969dd1
TM		 7405 .clientid = clp->cl_clientid,
7406 .seqid = clp->cl_seqid,
fc931582
AA		 7407 .cb_program = NFS4_CALLBACK,
7408 };
79969dd1
TM		 7409 struct nfs41_create_session_res res;
7410
fc931582
AA		 7411 struct rpc_message msg = {
7412 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7413 .rpc_argp = &args,
7414 .rpc_resp = &res,
848f5bda 7415 .rpc_cred = cred,
fc931582
AA		 7416 };
7417 int status;
7418
7419 nfs4_init_channel_attrs(&args);
0f91421e 7420 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7421
1bd714f2 7422 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7423 trace_nfs4_create_session(clp, status);
fc931582 7424
43095d39 7425 if (!status) {
8d35301d 7426 /* Verify the session's negotiated channel_attrs values */
79969dd1 7427 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7428 /* Increment the clientid slot sequence id */
79969dd1
TM		 7429 if (clp->cl_seqid == res.seqid)
7430 clp->cl_seqid++;
7431 if (status)
7432 goto out;
7433 nfs4_update_session(session, &res);
fc931582 7434 }
79969dd1 7435out:
fc931582
AA		 7436 return status;
7437}
7438
7439/*
7440 * Issues a CREATE_SESSION operation to the server.
7441 * It is the responsibility of the caller to verify the session is
7442 * expired before calling this routine.
7443 */
848f5bda 7444int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7445{
7446 int status;
7447 unsigned *ptr;
fc931582
AA		 7448 struct nfs4_session *session = clp->cl_session;
7449
7450 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7451
848f5bda 7452 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7453 if (status)
7454 goto out;
7455
aacd5537
AA		 7456 /* Init or reset the session slot tables */
7457 status = nfs4_setup_session_slot_tables(session);
7458 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7459 if (status)
7460 goto out;
7461
7462 ptr = (unsigned *)&session->sess_id.data[0];
7463 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7464 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7465out:
7466 dprintk("<-- %s\n", __func__);
7467 return status;
7468}
7469
0f3e66c6
AA		 7470/*
7471 * Issue the over-the-wire RPC DESTROY_SESSION.
7472 * The caller must serialize access to this routine.
7473 */
848f5bda
TM		 7474int nfs4_proc_destroy_session(struct nfs4_session *session,
7475 struct rpc_cred *cred)
0f3e66c6 7476{
848f5bda
TM		 7477 struct rpc_message msg = {
7478 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7479 .rpc_argp = session,
7480 .rpc_cred = cred,
7481 };
0f3e66c6 7482 int status = 0;
0f3e66c6
AA		 7483
7484 dprintk("--> nfs4_proc_destroy_session\n");
7485
7486 /* session is still being setup */
e11259f9
TM		 7487 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7488 return 0;
0f3e66c6 7489
1bd714f2 7490 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7491 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7492
7493 if (status)
08106ac7 7494 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7495 "Session has been destroyed regardless...\n", status);
7496
7497 dprintk("<-- nfs4_proc_destroy_session\n");
7498 return status;
7499}
7500
fc01cea9
AA		 7501/*
7502 * Renew the cl_session lease.
7503 */
d5f8d3fe
TM		 7504struct nfs4_sequence_data {
7505 struct nfs_client *clp;
7506 struct nfs4_sequence_args args;
7507 struct nfs4_sequence_res res;
7508};
7509
dc96aef9
AB		 7510static void nfs41_sequence_release(void *data)
7511{
d5f8d3fe
TM		 7512 struct nfs4_sequence_data *calldata = data;
7513 struct nfs_client *clp = calldata->clp;
dc96aef9 7514
7135840f
AB		 7515 if (atomic_read(&clp->cl_count) > 1)
7516 nfs4_schedule_state_renewal(clp);
7517 nfs_put_client(clp);
d5f8d3fe 7518 kfree(calldata);
dc96aef9
AB		 7519}
7520
aa5190d0
TM		 7521static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7522{
7523 switch(task->tk_status) {
7524 case -NFS4ERR_DELAY:
aa5190d0
TM		 7525 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7526 return -EAGAIN;
7527 default:
0400a6b0 7528 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7529 }
7530 return 0;
7531}
7532
dc96aef9 7533static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7534{
d5f8d3fe
TM		 7535 struct nfs4_sequence_data *calldata = data;
7536 struct nfs_client *clp = calldata->clp;
fc01cea9 7537
14516c3a
TM		 7538 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7539 return;
fc01cea9 7540
c6d01c6f 7541 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7542 if (task->tk_status < 0) {
7543 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7544 if (atomic_read(&clp->cl_count) == 1)
7545 goto out;
fc01cea9 7546
aa5190d0
TM		 7547 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7548 rpc_restart_call_prepare(task);
fc01cea9
AA		 7549 return;
7550 }
7551 }
fc01cea9 7552 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7553out:
fc01cea9
AA		 7554 dprintk("<-- %s\n", __func__);
7555}
7556
7557static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7558{
d5f8d3fe
TM		 7559 struct nfs4_sequence_data *calldata = data;
7560 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7561 struct nfs4_sequence_args *args;
7562 struct nfs4_sequence_res *res;
7563
fc01cea9
AA		 7564 args = task->tk_msg.rpc_argp;
7565 res = task->tk_msg.rpc_resp;
7566
d9afbd1b 7567 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7568}
7569
7570static const struct rpc_call_ops nfs41_sequence_ops = {
7571 .rpc_call_done = nfs41_sequence_call_done,
7572 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7573 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7574};
7575
8fe72bac
TM		 7576static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7577 struct rpc_cred *cred,
7578 bool is_privileged)
fc01cea9 7579{
d5f8d3fe 7580 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7581 struct rpc_message msg = {
7582 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7583 .rpc_cred = cred,
7584 };
71ac6da9
TM		 7585 struct rpc_task_setup task_setup_data = {
7586 .rpc_client = clp->cl_rpcclient,
7587 .rpc_message = &msg,
8fe72bac 7588 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7589 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7590 };
fc01cea9 7591
7135840f 7592 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7593 return ERR_PTR(-EIO);
dfb4f309 7594 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7595 if (calldata == NULL) {
7135840f 7596 nfs_put_client(clp);
71ac6da9 7597 return ERR_PTR(-ENOMEM);
fc01cea9 7598 }
a9c92d6b 7599 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7600 if (is_privileged)
7601 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7602 msg.rpc_argp = &calldata->args;
7603 msg.rpc_resp = &calldata->res;
7604 calldata->clp = clp;
71ac6da9 7605 task_setup_data.callback_data = calldata;
fc01cea9 7606
71ac6da9
TM		 7607 return rpc_run_task(&task_setup_data);
7608}
7609
2f60ea6b 7610static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7611{
7612 struct rpc_task *task;
7613 int ret = 0;
7614
2f60ea6b 7615 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7616 return -EAGAIN;
8fe72bac 7617 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7618 if (IS_ERR(task))
7619 ret = PTR_ERR(task);
7620 else
bf294b41 7621 rpc_put_task_async(task);
71ac6da9
TM		 7622 dprintk("<-- %s status=%d\n", __func__, ret);
7623 return ret;
7624}
7625
7626static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7627{
7628 struct rpc_task *task;
7629 int ret;
7630
8fe72bac 7631 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7632 if (IS_ERR(task)) {
7633 ret = PTR_ERR(task);
7634 goto out;
7635 }
7636 ret = rpc_wait_for_completion_task(task);
be824167 7637 if (!ret)
71ac6da9
TM		 7638 ret = task->tk_status;
7639 rpc_put_task(task);
7640out:
7641 dprintk("<-- %s status=%d\n", __func__, ret);
7642 return ret;
fc01cea9
AA		 7643}
7644
fce5c838
RL		 7645struct nfs4_reclaim_complete_data {
7646 struct nfs_client *clp;
7647 struct nfs41_reclaim_complete_args arg;
7648 struct nfs41_reclaim_complete_res res;
7649};
7650
7651static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7652{
7653 struct nfs4_reclaim_complete_data *calldata = data;
7654
d9afbd1b
TM		 7655 nfs41_setup_sequence(calldata->clp->cl_session,
7656 &calldata->arg.seq_args,
7657 &calldata->res.seq_res,
7658 task);
fce5c838
RL		 7659}
7660
aa5190d0
TM		 7661static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7662{
7663 switch(task->tk_status) {
7664 case 0:
7665 case -NFS4ERR_COMPLETE_ALREADY:
7666 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7667 break;
7668 case -NFS4ERR_DELAY:
aa5190d0 7669 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7670 /* fall through */
7671 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7672 return -EAGAIN;
7673 default:
0400a6b0 7674 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7675 }
7676 return 0;
7677}
7678
fce5c838
RL		 7679static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7680{
7681 struct nfs4_reclaim_complete_data *calldata = data;
7682 struct nfs_client *clp = calldata->clp;
7683 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7684
7685 dprintk("--> %s\n", __func__);
14516c3a
TM		 7686 if (!nfs41_sequence_done(task, res))
7687 return;
fce5c838 7688
c6d01c6f 7689 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7690 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7691 rpc_restart_call_prepare(task);
7692 return;
7693 }
fce5c838
RL		 7694 dprintk("<-- %s\n", __func__);
7695}
7696
7697static void nfs4_free_reclaim_complete_data(void *data)
7698{
7699 struct nfs4_reclaim_complete_data *calldata = data;
7700
7701 kfree(calldata);
7702}
7703
7704static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7705 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7706 .rpc_call_done = nfs4_reclaim_complete_done,
7707 .rpc_release = nfs4_free_reclaim_complete_data,
7708};
7709
7710/*
7711 * Issue a global reclaim complete.
7712 */
965e9c23
TM		 7713static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7714 struct rpc_cred *cred)
fce5c838
RL		 7715{
7716 struct nfs4_reclaim_complete_data *calldata;
7717 struct rpc_task *task;
7718 struct rpc_message msg = {
7719 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7720 .rpc_cred = cred,
fce5c838
RL		 7721 };
7722 struct rpc_task_setup task_setup_data = {
7723 .rpc_client = clp->cl_rpcclient,
7724 .rpc_message = &msg,
7725 .callback_ops = &nfs4_reclaim_complete_call_ops,
7726 .flags = RPC_TASK_ASYNC,
7727 };
7728 int status = -ENOMEM;
7729
7730 dprintk("--> %s\n", __func__);
8535b2be 7731 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7732 if (calldata == NULL)
7733 goto out;
7734 calldata->clp = clp;
7735 calldata->arg.one_fs = 0;
fce5c838 7736
a9c92d6b 7737 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7738 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7739 msg.rpc_argp = &calldata->arg;
7740 msg.rpc_resp = &calldata->res;
7741 task_setup_data.callback_data = calldata;
7742 task = rpc_run_task(&task_setup_data);
acf82b85 7743 if (IS_ERR(task)) {
fce5c838 7744 status = PTR_ERR(task);
acf82b85
DC		 7745 goto out;
7746 }
c34c32ea
AA		 7747 status = nfs4_wait_for_completion_rpc_task(task);
7748 if (status == 0)
7749 status = task->tk_status;
fce5c838 7750 rpc_put_task(task);
acf82b85 7751 return 0;
fce5c838
RL		 7752out:
7753 dprintk("<-- %s status=%d\n", __func__, status);
7754 return status;
7755}
b1f69b75
AA		 7756
7757static void
7758nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7759{
7760 struct nfs4_layoutget *lgp = calldata;
c31663d4 7761 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7762 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7763
7764 dprintk("--> %s\n", __func__);
c31663d4
FI		 7765 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7766 * right now covering the LAYOUTGET we are about to send.
7767 * However, that is not so catastrophic, and there seems
7768 * to be no way to prevent it completely.
7769 */
6ba7db34 7770 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7771 &lgp->res.seq_res, task))
b1f69b75 7772 return;
cf7d63f1
FI		 7773 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7774 NFS_I(lgp->args.inode)->layout,
ce6ab4f2 7775 &lgp->args.range,
cf7d63f1
FI		 7776 lgp->args.ctx->state)) {
7777 rpc_exit(task, NFS4_OK);
cf7d63f1 7778 }
b1f69b75
AA		 7779}
7780
7781static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7782{
7783 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7784 struct inode *inode = lgp->args.inode;
7785 struct nfs_server *server = NFS_SERVER(inode);
7786 struct pnfs_layout_hdr *lo;
7787 struct nfs4_state *state = NULL;
ed7e5423 7788 unsigned long timeo, now, giveup;
b1f69b75 7789
ed7e5423 7790 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7791
6ba7db34 7792 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7793 goto out;
b1f69b75
AA		 7794
7795 switch (task->tk_status) {
7796 case 0:
ee314c2a 7797 goto out;
21b874c8
TM		 7798 /*
7799 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
7800 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
7801 */
7802 case -NFS4ERR_BADLAYOUT:
7803 goto out_overflow;
ed7e5423
BH		 7804 /*
7805 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
21b874c8
TM		 7806 * (or clients) writing to the same RAID stripe except when
7807 * the minlength argument is 0 (see RFC5661 section 18.43.3).
ed7e5423 7808 */
b1f69b75 7809 case -NFS4ERR_LAYOUTTRYLATER:
21b874c8
TM		 7810 if (lgp->args.minlength == 0)
7811 goto out_overflow;
ed7e5423
BH		 7812 /*
7813 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7814 * existing layout before getting a new one).
7815 */
b1f69b75 7816 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7817 timeo = rpc_get_timeout(task->tk_client);
7818 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7819 now = jiffies;
7820 if (time_after(giveup, now)) {
7821 unsigned long delay;
7822
7823 /* Delay for:
7824 * - Not less then NFS4_POLL_RETRY_MIN.
7825 * - One last time a jiffie before we give up
7826 * - exponential backoff (time_now minus start_attempt)
7827 */
7828 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7829 min((giveup - now - 1),
7830 now - lgp->args.timestamp));
7831
7832 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7833 __func__, delay);
7834 rpc_delay(task, delay);
2259f960
TM		 7835 /* Do not call nfs4_async_handle_error() */
7836 goto out_restart;
ed7e5423 7837 }
ee314c2a
TM		 7838 break;
7839 case -NFS4ERR_EXPIRED:
7840 case -NFS4ERR_BAD_STATEID:
7841 spin_lock(&inode->i_lock);
2259f960
TM		 7842 if (nfs4_stateid_match(&lgp->args.stateid,
7843 &lgp->args.ctx->state->stateid)) {
ee314c2a
TM		 7844 spin_unlock(&inode->i_lock);
7845 /* If the open stateid was bad, then recover it. */
7846 state = lgp->args.ctx->state;
2259f960
TM		 7847 break;
7848 }
7849 lo = NFS_I(inode)->layout;
7850 if (lo && nfs4_stateid_match(&lgp->args.stateid,
7851 &lo->plh_stateid)) {
ee314c2a
TM		 7852 LIST_HEAD(head);
7853
defb8460
CH		 7854 /*
7855 * Mark the bad layout state as invalid, then retry
7856 * with the current stateid.
7857 */
8714d46d 7858 set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);
ee314c2a
TM		 7859 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7860 spin_unlock(&inode->i_lock);
ee314c2a 7861 pnfs_free_lseg_list(&head);
2259f960
TM		 7862 } else
7863 spin_unlock(&inode->i_lock);
7864 goto out_restart;
b1f69b75 7865 }
91ab4b4d 7866 if (nfs4_async_handle_error(task, server, state, &lgp->timeout) == -EAGAIN)
2259f960 7867 goto out_restart;
ee314c2a 7868out:
b1f69b75 7869 dprintk("<-- %s\n", __func__);
21b874c8 7870 return;
2259f960
TM		 7871out_restart:
7872 task->tk_status = 0;
7873 rpc_restart_call_prepare(task);
7874 return;
21b874c8
TM		 7875out_overflow:
7876 task->tk_status = -EOVERFLOW;
7877 goto out;
b1f69b75
AA		 7878}
7879
8554116e
IK		 7880static size_t max_response_pages(struct nfs_server *server)
7881{
7882 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7883 return nfs_page_array_len(0, max_resp_sz);
7884}
7885
7886static void nfs4_free_pages(struct page **pages, size_t size)
7887{
7888 int i;
7889
7890 if (!pages)
7891 return;
7892
7893 for (i = 0; i < size; i++) {
7894 if (!pages[i])
7895 break;
7896 __free_page(pages[i]);
7897 }
7898 kfree(pages);
7899}
7900
7901static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7902{
7903 struct page **pages;
7904 int i;
7905
7906 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7907 if (!pages) {
7908 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7909 return NULL;
7910 }
7911
7912 for (i = 0; i < size; i++) {
7913 pages[i] = alloc_page(gfp_flags);
7914 if (!pages[i]) {
7915 dprintk("%s: failed to allocate page\n", __func__);
7916 nfs4_free_pages(pages, size);
7917 return NULL;
7918 }
7919 }
7920
7921 return pages;
7922}
7923
b1f69b75
AA		 7924static void nfs4_layoutget_release(void *calldata)
7925{
7926 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7927 struct inode *inode = lgp->args.inode;
7928 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7929 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7930
7931 dprintk("--> %s\n", __func__);
8554116e 7932 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7933 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7934 put_nfs_open_context(lgp->args.ctx);
7935 kfree(calldata);
7936 dprintk("<-- %s\n", __func__);
7937}
7938
7939static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7940 .rpc_call_prepare = nfs4_layoutget_prepare,
7941 .rpc_call_done = nfs4_layoutget_done,
7942 .rpc_release = nfs4_layoutget_release,
7943};
7944
a0b0a6e3
TM		 7945struct pnfs_layout_segment *
7946nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7947{
a47970ff
WAA		 7948 struct inode *inode = lgp->args.inode;
7949 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7950 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7951 struct rpc_task *task;
7952 struct rpc_message msg = {
7953 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7954 .rpc_argp = &lgp->args,
7955 .rpc_resp = &lgp->res,
6ab59344 7956 .rpc_cred = lgp->cred,
b1f69b75
AA		 7957 };
7958 struct rpc_task_setup task_setup_data = {
7959 .rpc_client = server->client,
7960 .rpc_message = &msg,
7961 .callback_ops = &nfs4_layoutget_call_ops,
7962 .callback_data = lgp,
7963 .flags = RPC_TASK_ASYNC,
7964 };
a0b0a6e3 7965 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7966 int status = 0;
7967
7968 dprintk("--> %s\n", __func__);
7969
4bd5a980
PT		 7970 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7971 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7972
8554116e
IK		 7973 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7974 if (!lgp->args.layout.pages) {
7975 nfs4_layoutget_release(lgp);
a0b0a6e3 7976 return ERR_PTR(-ENOMEM);
8554116e
IK		 7977 }
7978 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7979 lgp->args.timestamp = jiffies;
8554116e 7980
35124a09 7981 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7982 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7983 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 7984
b1f69b75
AA		 7985 task = rpc_run_task(&task_setup_data);
7986 if (IS_ERR(task))
a0b0a6e3 7987 return ERR_CAST(task);
b1f69b75 7988 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7989 if (status == 0)
7990 status = task->tk_status;
1037e6ea
TM		 7991 trace_nfs4_layoutget(lgp->args.ctx,
7992 &lgp->args.range,
7993 &lgp->res.range,
48c9579a 7994 &lgp->res.stateid,
1037e6ea 7995 status);
085b7a45
WAA		 7996 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7997 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7998 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7999 rpc_put_task(task);
8000 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 8001 if (status)
8002 return ERR_PTR(status);
8003 return lseg;
b1f69b75
AA		 8004}
8005
cbe82603
BH		 8006static void
8007nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8008{
8009 struct nfs4_layoutreturn *lrp = calldata;
8010
8011 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 8012 nfs41_setup_sequence(lrp->clp->cl_session,
8013 &lrp->args.seq_args,
8014 &lrp->res.seq_res,
8015 task);
cbe82603
BH		 8016}
8017
8018static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8019{
8020 struct nfs4_layoutreturn *lrp = calldata;
8021 struct nfs_server *server;
8022
8023 dprintk("--> %s\n", __func__);
8024
6ba7db34 8025 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 8026 return;
8027
8028 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 8029 switch (task->tk_status) {
8030 default:
8031 task->tk_status = 0;
8032 case 0:
8033 break;
8034 case -NFS4ERR_DELAY:
8478eaa1 8035 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 8036 break;
d00c5d43 8037 rpc_restart_call_prepare(task);
cbe82603
BH		 8038 return;
8039 }
cbe82603
BH		 8040 dprintk("<-- %s\n", __func__);
8041}
8042
8043static void nfs4_layoutreturn_release(void *calldata)
8044{
8045 struct nfs4_layoutreturn *lrp = calldata;
849b286f 8046 struct pnfs_layout_hdr *lo = lrp->args.layout;
c5d73716 8047 LIST_HEAD(freeme);
cbe82603
BH		 8048
8049 dprintk("--> %s\n", __func__);
849b286f
TM		 8050 spin_lock(&lo->plh_inode->i_lock);
8051 if (lrp->res.lrs_present)
8052 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
c5d73716 8053 pnfs_mark_matching_lsegs_invalid(lo, &freeme, &lrp->args.range);
d67ae825 8054 pnfs_clear_layoutreturn_waitbit(lo);
849b286f
TM		 8055 lo->plh_block_lgets--;
8056 spin_unlock(&lo->plh_inode->i_lock);
c5d73716 8057 pnfs_free_lseg_list(&freeme);
70c3bd2b 8058 pnfs_put_layout_hdr(lrp->args.layout);
5a0ec8ac 8059 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 8060 kfree(calldata);
8061 dprintk("<-- %s\n", __func__);
8062}
8063
8064static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8065 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8066 .rpc_call_done = nfs4_layoutreturn_done,
8067 .rpc_release = nfs4_layoutreturn_release,
8068};
8069
6c16605d 8070int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 8071{
8072 struct rpc_task *task;
8073 struct rpc_message msg = {
8074 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8075 .rpc_argp = &lrp->args,
8076 .rpc_resp = &lrp->res,
9556000d 8077 .rpc_cred = lrp->cred,
cbe82603
BH		 8078 };
8079 struct rpc_task_setup task_setup_data = {
1771c577 8080 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8081 .rpc_message = &msg,
8082 .callback_ops = &nfs4_layoutreturn_call_ops,
8083 .callback_data = lrp,
8084 };
6c16605d 8085 int status = 0;
cbe82603
BH		 8086
8087 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8088 if (!sync) {
8089 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8090 if (!lrp->inode) {
8091 nfs4_layoutreturn_release(lrp);
8092 return -EAGAIN;
8093 }
8094 task_setup_data.flags |= RPC_TASK_ASYNC;
8095 }
a9c92d6b 8096 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8097 task = rpc_run_task(&task_setup_data);
8098 if (IS_ERR(task))
8099 return PTR_ERR(task);
5a0ec8ac
TM		 8100 if (sync)
8101 status = task->tk_status;
48c9579a 8102 trace_nfs4_layoutreturn(lrp->args.inode, &lrp->args.stateid, status);
cbe82603
BH		 8103 dprintk("<-- %s status=%d\n", __func__, status);
8104 rpc_put_task(task);
8105 return status;
8106}
8107
b1f69b75 8108static int
cd5875fe
TM		 8109_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8110 struct pnfs_device *pdev,
8111 struct rpc_cred *cred)
b1f69b75
AA		 8112{
8113 struct nfs4_getdeviceinfo_args args = {
8114 .pdev = pdev,
4e590803
TM		 8115 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8116 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8117 };
8118 struct nfs4_getdeviceinfo_res res = {
8119 .pdev = pdev,
8120 };
8121 struct rpc_message msg = {
8122 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8123 .rpc_argp = &args,
8124 .rpc_resp = &res,
cd5875fe 8125 .rpc_cred = cred,
b1f69b75
AA		 8126 };
8127 int status;
8128
8129 dprintk("--> %s\n", __func__);
7c513058 8130 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8131 if (res.notification & ~args.notify_types)
8132 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8133 if (res.notification != args.notify_types)
8134 pdev->nocache = 1;
4e590803 8135
b1f69b75
AA		 8136 dprintk("<-- %s status=%d\n", __func__, status);
8137
8138 return status;
8139}
8140
cd5875fe
TM		 8141int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8142 struct pnfs_device *pdev,
8143 struct rpc_cred *cred)
b1f69b75
AA		 8144{
8145 struct nfs4_exception exception = { };
8146 int err;
8147
8148 do {
8149 err = nfs4_handle_exception(server,
cd5875fe 8150 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8151 &exception);
8152 } while (exception.retry);
8153 return err;
8154}
8155EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8156
863a3c6c
AA		 8157static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8158{
8159 struct nfs4_layoutcommit_data *data = calldata;
8160 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 8161 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 8162
d9afbd1b
TM		 8163 nfs41_setup_sequence(session,
8164 &data->args.seq_args,
8165 &data->res.seq_res,
8166 task);
863a3c6c
AA		 8167}
8168
8169static void
8170nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8171{
8172 struct nfs4_layoutcommit_data *data = calldata;
8173 struct nfs_server *server = NFS_SERVER(data->args.inode);
8174
6ba7db34 8175 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8176 return;
8177
8178 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8179 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8180 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8181 case -NFS4ERR_BADLAYOUT: /* no layout */
8182 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8183 task->tk_status = 0;
e59d27e0 8184 case 0:
e59d27e0
TM		 8185 break;
8186 default:
8478eaa1 8187 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8188 rpc_restart_call_prepare(task);
8189 return;
8190 }
8191 }
863a3c6c
AA		 8192}
8193
8194static void nfs4_layoutcommit_release(void *calldata)
8195{
8196 struct nfs4_layoutcommit_data *data = calldata;
8197
db29c089 8198 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8199 nfs_post_op_update_inode_force_wcc(data->args.inode,
8200 data->res.fattr);
863a3c6c 8201 put_rpccred(data->cred);
472e2594 8202 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8203 kfree(data);
8204}
8205
8206static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8207 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8208 .rpc_call_done = nfs4_layoutcommit_done,
8209 .rpc_release = nfs4_layoutcommit_release,
8210};
8211
8212int
ef311537 8213nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8214{
8215 struct rpc_message msg = {
8216 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8217 .rpc_argp = &data->args,
8218 .rpc_resp = &data->res,
8219 .rpc_cred = data->cred,
8220 };
8221 struct rpc_task_setup task_setup_data = {
8222 .task = &data->task,
8223 .rpc_client = NFS_CLIENT(data->args.inode),
8224 .rpc_message = &msg,
8225 .callback_ops = &nfs4_layoutcommit_ops,
8226 .callback_data = data,
863a3c6c
AA		 8227 };
8228 struct rpc_task *task;
8229 int status = 0;
8230
b4839ebe
KM		 8231 dprintk("NFS: initiating layoutcommit call. sync %d "
8232 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8233 data->args.lastbytewritten,
8234 data->args.inode->i_ino);
8235
472e2594
TM		 8236 if (!sync) {
8237 data->inode = nfs_igrab_and_active(data->args.inode);
8238 if (data->inode == NULL) {
8239 nfs4_layoutcommit_release(data);
8240 return -EAGAIN;
8241 }
8242 task_setup_data.flags = RPC_TASK_ASYNC;
8243 }
a9c92d6b 8244 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8245 task = rpc_run_task(&task_setup_data);
8246 if (IS_ERR(task))
8247 return PTR_ERR(task);
472e2594
TM		 8248 if (sync)
8249 status = task->tk_status;
48c9579a 8250 trace_nfs4_layoutcommit(data->args.inode, &data->args.stateid, status);
863a3c6c
AA		 8251 dprintk("%s: status %d\n", __func__, status);
8252 rpc_put_task(task);
8253 return status;
8254}
fca78d6d 8255
97431204
AA		 8256/**
8257 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8258 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8259 */
fca78d6d
BS		 8260static int
8261_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8262 struct nfs_fsinfo *info,
8263 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8264{
8265 struct nfs41_secinfo_no_name_args args = {
8266 .style = SECINFO_STYLE_CURRENT_FH,
8267 };
8268 struct nfs4_secinfo_res res = {
8269 .flavors = flavors,
8270 };
8271 struct rpc_message msg = {
8272 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8273 .rpc_argp = &args,
8274 .rpc_resp = &res,
8275 };
b1b3e136 8276 struct rpc_clnt *clnt = server->client;
7cb852df 8277 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8278 int status;
8279
8280 if (use_integrity) {
8281 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8282 cred = nfs4_get_clid_cred(server->nfs_client);
8283 msg.rpc_cred = cred;
b1b3e136
WAA		 8284 }
8285
8286 dprintk("--> %s\n", __func__);
8287 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8288 &res.seq_res, 0);
8289 dprintk("<-- %s status=%d\n", __func__, status);
8290
7cb852df
WAA		 8291 if (cred)
8292 put_rpccred(cred);
b1b3e136
WAA		 8293
8294 return status;
fca78d6d
BS		 8295}
8296
8297static int
8298nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8299 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8300{
8301 struct nfs4_exception exception = { };
8302 int err;
8303 do {
b1b3e136
WAA		 8304 /* first try using integrity protection */
8305 err = -NFS4ERR_WRONGSEC;
8306
8307 /* try to use integrity protection with machine cred */
8308 if (_nfs4_is_integrity_protected(server->nfs_client))
8309 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8310 flavors, true);
8311
8312 /*
8313 * if unable to use integrity protection, or SECINFO with
8314 * integrity protection returns NFS4ERR_WRONGSEC (which is
8315 * disallowed by spec, but exists in deployed servers) use
8316 * the current filesystem's rpc_client and the user cred.
8317 */
8318 if (err == -NFS4ERR_WRONGSEC)
8319 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8320 flavors, false);
8321
fca78d6d
BS		 8322 switch (err) {
8323 case 0:
8324 case -NFS4ERR_WRONGSEC:
78b19bae 8325 case -ENOTSUPP:
05e9cfb4 8326 goto out;
fca78d6d
BS		 8327 default:
8328 err = nfs4_handle_exception(server, err, &exception);
8329 }
8330 } while (exception.retry);
05e9cfb4 8331out:
fca78d6d
BS		 8332 return err;
8333}
8334
8335static int
8336nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8337 struct nfs_fsinfo *info)
8338{
8339 int err;
8340 struct page *page;
367156d9 8341 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8342 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8343 struct nfs4_secinfo4 *secinfo;
8344 int i;
fca78d6d
BS		 8345
8346 page = alloc_page(GFP_KERNEL);
8347 if (!page) {
8348 err = -ENOMEM;
8349 goto out;
8350 }
8351
8352 flavors = page_address(page);
8353 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8354
8355 /*
8356 * Fall back on "guess and check" method if
8357 * the server doesn't support SECINFO_NO_NAME
8358 */
78b19bae 8359 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8360 err = nfs4_find_root_sec(server, fhandle, info);
8361 goto out_freepage;
8362 }
8363 if (err)
8364 goto out_freepage;
8365
58a8cf12
WAA		 8366 for (i = 0; i < flavors->num_flavors; i++) {
8367 secinfo = &flavors->flavors[i];
8368
8369 switch (secinfo->flavor) {
8370 case RPC_AUTH_NULL:
8371 case RPC_AUTH_UNIX:
8372 case RPC_AUTH_GSS:
8373 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8374 &secinfo->flavor_info);
8375 break;
8376 default:
8377 flavor = RPC_AUTH_MAXFLAVOR;
8378 break;
8379 }
8380
4d4b69dd
WAA		 8381 if (!nfs_auth_info_match(&server->auth_info, flavor))
8382 flavor = RPC_AUTH_MAXFLAVOR;
8383
58a8cf12
WAA		 8384 if (flavor != RPC_AUTH_MAXFLAVOR) {
8385 err = nfs4_lookup_root_sec(server, fhandle,
8386 info, flavor);
8387 if (!err)
8388 break;
8389 }
8390 }
8391
8392 if (flavor == RPC_AUTH_MAXFLAVOR)
8393 err = -EPERM;
fca78d6d
BS		 8394
8395out_freepage:
8396 put_page(page);
8397 if (err == -EACCES)
8398 return -EPERM;
8399out:
8400 return err;
8401}
1cab0652 8402
ab7cb0df
TM		 8403static int _nfs41_test_stateid(struct nfs_server *server,
8404 nfs4_stateid *stateid,
8405 struct rpc_cred *cred)
7d974794
BS		 8406{
8407 int status;
8408 struct nfs41_test_stateid_args args = {
1cab0652 8409 .stateid = stateid,
7d974794
BS		 8410 };
8411 struct nfs41_test_stateid_res res;
8412 struct rpc_message msg = {
8413 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8414 .rpc_argp = &args,
8415 .rpc_resp = &res,
ab7cb0df 8416 .rpc_cred = cred,
7d974794 8417 };
3787d506
WAA		 8418 struct rpc_clnt *rpc_client = server->client;
8419
8420 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8421 &rpc_client, &msg);
1cab0652 8422
38527b15 8423 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8424 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8425 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8426 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8427 &args.seq_args, &res.seq_res);
38527b15
CL		 8428 if (status != NFS_OK) {
8429 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8430 return status;
38527b15
CL		 8431 }
8432 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8433 return -res.status;
7d974794
BS		 8434}
8435
38527b15
CL		 8436/**
8437 * nfs41_test_stateid - perform a TEST_STATEID operation
8438 *
8439 * @server: server / transport on which to perform the operation
8440 * @stateid: state ID to test
ab7cb0df 8441 * @cred: credential
38527b15
CL		 8442 *
8443 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8444 * Otherwise a negative NFS4ERR value is returned if the operation
8445 * failed or the state ID is not currently valid.
8446 */
ab7cb0df
TM		 8447static int nfs41_test_stateid(struct nfs_server *server,
8448 nfs4_stateid *stateid,
8449 struct rpc_cred *cred)
7d974794
BS		 8450{
8451 struct nfs4_exception exception = { };
8452 int err;
8453 do {
ab7cb0df 8454 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8455 if (err != -NFS4ERR_DELAY)
8456 break;
8457 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8458 } while (exception.retry);
8459 return err;
8460}
9aeda35f 8461
7c1d5fae
TM		 8462struct nfs_free_stateid_data {
8463 struct nfs_server *server;
8464 struct nfs41_free_stateid_args args;
9aeda35f 8465 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8466};
8467
8468static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8469{
8470 struct nfs_free_stateid_data *data = calldata;
8471 nfs41_setup_sequence(nfs4_get_session(data->server),
8472 &data->args.seq_args,
8473 &data->res.seq_res,
8474 task);
8475}
8476
8477static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8478{
8479 struct nfs_free_stateid_data *data = calldata;
8480
8481 nfs41_sequence_done(task, &data->res.seq_res);
8482
8483 switch (task->tk_status) {
8484 case -NFS4ERR_DELAY:
8478eaa1 8485 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8486 rpc_restart_call_prepare(task);
8487 }
8488}
8489
8490static void nfs41_free_stateid_release(void *calldata)
8491{
8492 kfree(calldata);
8493}
8494
17f26b12 8495static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8496 .rpc_call_prepare = nfs41_free_stateid_prepare,
8497 .rpc_call_done = nfs41_free_stateid_done,
8498 .rpc_release = nfs41_free_stateid_release,
8499};
8500
8501static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8502 nfs4_stateid *stateid,
ab7cb0df 8503 struct rpc_cred *cred,
7c1d5fae
TM		 8504 bool privileged)
8505{
9aeda35f
BS		 8506 struct rpc_message msg = {
8507 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8508 .rpc_cred = cred,
9aeda35f 8509 };
7c1d5fae
TM		 8510 struct rpc_task_setup task_setup = {
8511 .rpc_client = server->client,
8512 .rpc_message = &msg,
8513 .callback_ops = &nfs41_free_stateid_ops,
8514 .flags = RPC_TASK_ASYNC,
8515 };
8516 struct nfs_free_stateid_data *data;
9aeda35f 8517
3787d506
WAA		 8518 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8519 &task_setup.rpc_client, &msg);
8520
38527b15 8521 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8522 data = kmalloc(sizeof(*data), GFP_NOFS);
8523 if (!data)
8524 return ERR_PTR(-ENOMEM);
8525 data->server = server;
8526 nfs4_stateid_copy(&data->args.stateid, stateid);
8527
8528 task_setup.callback_data = data;
8529
8530 msg.rpc_argp = &data->args;
8531 msg.rpc_resp = &data->res;
a9c92d6b 8532 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8533 if (privileged)
8534 nfs4_set_sequence_privileged(&data->args.seq_args);
8535
8536 return rpc_run_task(&task_setup);
9aeda35f
BS		 8537}
8538
38527b15
CL		 8539/**
8540 * nfs41_free_stateid - perform a FREE_STATEID operation
8541 *
8542 * @server: server / transport on which to perform the operation
8543 * @stateid: state ID to release
ab7cb0df 8544 * @cred: credential
38527b15
CL		 8545 *
8546 * Returns NFS_OK if the server freed "stateid". Otherwise a
8547 * negative NFS4ERR value is returned.
8548 */
ab7cb0df
TM		 8549static int nfs41_free_stateid(struct nfs_server *server,
8550 nfs4_stateid *stateid,
8551 struct rpc_cred *cred)
9aeda35f 8552{
7c1d5fae
TM		 8553 struct rpc_task *task;
8554 int ret;
8555
ab7cb0df 8556 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8557 if (IS_ERR(task))
8558 return PTR_ERR(task);
8559 ret = rpc_wait_for_completion_task(task);
8560 if (!ret)
8561 ret = task->tk_status;
8562 rpc_put_task(task);
8563 return ret;
9aeda35f 8564}
36281caa 8565
f1cdae87
JL		 8566static void
8567nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8568{
8569 struct rpc_task *task;
ab7cb0df 8570 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8571
ab7cb0df 8572 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8573 nfs4_free_lock_state(server, lsp);
8574 if (IS_ERR(task))
f1cdae87 8575 return;
c8b2d0bf 8576 rpc_put_task(task);
c8b2d0bf
TM		 8577}
8578
36281caa
TM		 8579static bool nfs41_match_stateid(const nfs4_stateid *s1,
8580 const nfs4_stateid *s2)
8581{
2d2f24ad 8582 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8583 return false;
8584
2d2f24ad 8585 if (s1->seqid == s2->seqid)
36281caa 8586 return true;
2d2f24ad 8587 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8588 return true;
8589
8590 return false;
8591}
8592
557134a3
AA		 8593#endif /* CONFIG_NFS_V4_1 */
8594
36281caa
TM		 8595static bool nfs4_match_stateid(const nfs4_stateid *s1,
8596 const nfs4_stateid *s2)
8597{
f597c537 8598 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8599}
8600
8601
17280175 8602static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8603 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8604 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8605 .recover_open = nfs4_open_reclaim,
8606 .recover_lock = nfs4_lock_reclaim,
591d71cb 8607 .establish_clid = nfs4_init_clientid,
05f4c350 8608 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8609};
8610
591d71cb 8611#if defined(CONFIG_NFS_V4_1)
17280175 8612static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8613 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8614 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8615 .recover_open = nfs4_open_reclaim,
8616 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8617 .establish_clid = nfs41_init_clientid,
fce5c838 8618 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8619 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8620};
8621#endif /* CONFIG_NFS_V4_1 */
8622
17280175 8623static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8624 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8625 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8626 .recover_open = nfs40_open_expired,
591d71cb
AA		 8627 .recover_lock = nfs4_lock_expired,
8628 .establish_clid = nfs4_init_clientid,
8629};
8630
8631#if defined(CONFIG_NFS_V4_1)
17280175 8632static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8633 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8634 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8635 .recover_open = nfs41_open_expired,
8636 .recover_lock = nfs41_lock_expired,
4d643d1d 8637 .establish_clid = nfs41_init_clientid,
1da177e4 8638};
591d71cb 8639#endif /* CONFIG_NFS_V4_1 */
1da177e4 8640
17280175 8641static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8642 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8643 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8644 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8645};
8646
8647#if defined(CONFIG_NFS_V4_1)
17280175 8648static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8649 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8650 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8651 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8652};
8653#endif
8654
ec011fe8 8655static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8656 .get_locations = _nfs40_proc_get_locations,
44c99933 8657 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8658};
8659
8660#if defined(CONFIG_NFS_V4_1)
8661static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8662 .get_locations = _nfs41_proc_get_locations,
44c99933 8663 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8664};
8665#endif /* CONFIG_NFS_V4_1 */
8666
97dc1359
TM		 8667static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8668 .minor_version = 0,
39c6daae
TM		 8669 .init_caps = NFS_CAP_READDIRPLUS
8670 | NFS_CAP_ATOMIC_OPEN
39c6daae 8671 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8672 .init_client = nfs40_init_client,
8673 .shutdown_client = nfs40_shutdown_client,
36281caa 8674 .match_stateid = nfs4_match_stateid,
fca78d6d 8675 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8676 .free_lock_state = nfs4_release_lockowner,
63f5f796 8677 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 8678 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8679 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8680 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8681 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8682 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8683};
8684
8685#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 8686static struct nfs_seqid *
8687nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8688{
8689 return NULL;
8690}
8691
97dc1359
TM		 8692static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8693 .minor_version = 1,
39c6daae
TM		 8694 .init_caps = NFS_CAP_READDIRPLUS
8695 | NFS_CAP_ATOMIC_OPEN
3b66486c 8696 | NFS_CAP_POSIX_LOCK
49f9a0fa 8697 | NFS_CAP_STATEID_NFSV41
e983120e 8698 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8699 .init_client = nfs41_init_client,
8700 .shutdown_client = nfs41_shutdown_client,
36281caa 8701 .match_stateid = nfs41_match_stateid,
fca78d6d 8702 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8703 .free_lock_state = nfs41_free_lock_state,
63f5f796 8704 .alloc_seqid = nfs_alloc_no_seqid,
9915ea7e 8705 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8706 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8707 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8708 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8709 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8710};
8711#endif
8712
42c2c424
SD		 8713#if defined(CONFIG_NFS_V4_2)
8714static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8715 .minor_version = 2,
7017310a
BS		 8716 .init_caps = NFS_CAP_READDIRPLUS
8717 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 8718 | NFS_CAP_POSIX_LOCK
8719 | NFS_CAP_STATEID_NFSV41
e983120e 8720 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 8721 | NFS_CAP_ALLOCATE
624bd5b7 8722 | NFS_CAP_DEALLOCATE
6c5a0d89 8723 | NFS_CAP_SEEK
e5341f3a
PT		 8724 | NFS_CAP_LAYOUTSTATS
8725 | NFS_CAP_CLONE,
abf79bb3
CL		 8726 .init_client = nfs41_init_client,
8727 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8728 .match_stateid = nfs41_match_stateid,
8729 .find_root_sec = nfs41_find_root_sec,
7017310a 8730 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8731 .call_sync_ops = &nfs41_call_sync_ops,
63f5f796 8732 .alloc_seqid = nfs_alloc_no_seqid,
42c2c424
SD		 8733 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8734 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8735 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 8736 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 8737};
8738#endif
8739
97dc1359
TM		 8740const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8741 [0] = &nfs_v4_0_minor_ops,
8742#if defined(CONFIG_NFS_V4_1)
8743 [1] = &nfs_v4_1_minor_ops,
8744#endif
42c2c424
SD		 8745#if defined(CONFIG_NFS_V4_2)
8746 [2] = &nfs_v4_2_minor_ops,
8747#endif
97dc1359
TM		 8748};
8749
17f26b12 8750static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8751 .create = nfs_create,
8752 .lookup = nfs_lookup,
8753 .atomic_open = nfs_atomic_open,
8754 .link = nfs_link,
8755 .unlink = nfs_unlink,
8756 .symlink = nfs_symlink,
8757 .mkdir = nfs_mkdir,
8758 .rmdir = nfs_rmdir,
8759 .mknod = nfs_mknod,
8760 .rename = nfs_rename,
8761 .permission = nfs_permission,
8762 .getattr = nfs_getattr,
8763 .setattr = nfs_setattr,
8764 .getxattr = generic_getxattr,
8765 .setxattr = generic_setxattr,
8766 .listxattr = generic_listxattr,
8767 .removexattr = generic_removexattr,
8768};
8769
92e1d5be 8770static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8771 .permission = nfs_permission,
8772 .getattr = nfs_getattr,
8773 .setattr = nfs_setattr,
64c2ce8b
AK		 8774 .getxattr = generic_getxattr,
8775 .setxattr = generic_setxattr,
8776 .listxattr = generic_listxattr,
8777 .removexattr = generic_removexattr,
6b3b5496
BF		 8778};
8779
509de811 8780const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8781 .version = 4, /* protocol version */
8782 .dentry_ops = &nfs4_dentry_operations,
8783 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8784 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8785 .file_ops = &nfs4_file_operations,
1da177e4 8786 .getroot = nfs4_proc_get_root,
281cad46 8787 .submount = nfs4_submount,
ff9099f2 8788 .try_mount = nfs4_try_mount,
1da177e4
LT		 8789 .getattr = nfs4_proc_getattr,
8790 .setattr = nfs4_proc_setattr,
8791 .lookup = nfs4_proc_lookup,
8792 .access = nfs4_proc_access,
8793 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8794 .create = nfs4_proc_create,
8795 .remove = nfs4_proc_remove,
8796 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8797 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8798 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8799 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8800 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8801 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8802 .link = nfs4_proc_link,
8803 .symlink = nfs4_proc_symlink,
8804 .mkdir = nfs4_proc_mkdir,
8805 .rmdir = nfs4_proc_remove,
8806 .readdir = nfs4_proc_readdir,
8807 .mknod = nfs4_proc_mknod,
8808 .statfs = nfs4_proc_statfs,
8809 .fsinfo = nfs4_proc_fsinfo,
8810 .pathconf = nfs4_proc_pathconf,
e9326dca 8811 .set_capabilities = nfs4_server_capabilities,
1da177e4 8812 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8813 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8814 .read_setup = nfs4_proc_read_setup,
ec06c096 8815 .read_done = nfs4_read_done,
1da177e4 8816 .write_setup = nfs4_proc_write_setup,
788e7a89 8817 .write_done = nfs4_write_done,
1da177e4 8818 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8819 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8820 .commit_done = nfs4_commit_done,
1da177e4 8821 .lock = nfs4_proc_lock,
e50a1c2e 8822 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8823 .close_context = nfs4_close_context,
2b484297 8824 .open_context = nfs4_atomic_open,
011e2a7f 8825 .have_delegation = nfs4_have_delegation,
57ec14c5 8826 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8827 .alloc_client = nfs4_alloc_client,
45a52a02 8828 .init_client = nfs4_init_client,
cdb7eced 8829 .free_client = nfs4_free_client,
1179acc6
BS		 8830 .create_server = nfs4_create_server,
8831 .clone_server = nfs_clone_server,
1da177e4
LT		 8832};
8833
64c2ce8b
AK		 8834static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8835 .prefix = XATTR_NAME_NFSV4_ACL,
8836 .list = nfs4_xattr_list_nfs4_acl,
8837 .get = nfs4_xattr_get_nfs4_acl,
8838 .set = nfs4_xattr_set_nfs4_acl,
8839};
8840
8841const struct xattr_handler *nfs4_xattr_handlers[] = {
8842 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8843#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8844 &nfs4_xattr_nfs4_label_handler,
8845#endif
64c2ce8b
AK		 8846 NULL
8847};
8848
1da177e4
LT		 8849/*
8850 * Local variables:
8851 * c-basic-offset: 8
8852 * End:
8853 */
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