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xfs: Change how listxattr generates synthetic attributes
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
feaff8e5 41#include <linux/file.h>
1da177e4 42#include <linux/string.h>
652f89f6
TM		 43#include <linux/ratelimit.h>
44#include <linux/printk.h>
5a0e3ad6 45#include <linux/slab.h>
1da177e4
LT		 46#include <linux/sunrpc/clnt.h>
47#include <linux/nfs.h>
48#include <linux/nfs4.h>
49#include <linux/nfs_fs.h>
50#include <linux/nfs_page.h>
9b7160c5 51#include <linux/nfs_mount.h>
1da177e4 52#include <linux/namei.h>
02a913a7 53#include <linux/mount.h>
99fe60d0 54#include <linux/module.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
40c64c26 66#include "nfs4idmap.h"
73e39aaa 67#include "nfs4session.h"
de242c0b 68#include "fscache.h"
1da177e4 69
c6d01c6f
TM		 70#include "nfs4trace.h"
71
1da177e4
LT		 72#define NFSDBG_FACILITY NFSDBG_PROC
73
2066fe89 74#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 75#define NFS4_POLL_RETRY_MAX (15*HZ)
76
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);
aac00a8d
TM		 1601 goto out;
1602 }
1603
1b370bc2 1604 ret = -EAGAIN;
24ac23ab 1605 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1606 goto err;
1775fd3e 1607 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1608 ret = PTR_ERR(inode);
03f28e3a 1609 if (IS_ERR(inode))
1b370bc2
TM		 1610 goto err;
1611 ret = -ENOMEM;
24ac23ab
TM		 1612 state = nfs4_get_open_state(inode, data->owner);
1613 if (state == NULL)
1b370bc2 1614 goto err_put_inode;
e23008ec
AA		 1615 if (data->o_res.delegation_type != 0)
1616 nfs4_opendata_check_deleg(data, state);
34310430 1617 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1618 data->o_arg.fmode);
24ac23ab 1619 iput(inode);
aac00a8d 1620out:
7aa262b5 1621 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1622 return state;
1b370bc2
TM		 1623err_put_inode:
1624 iput(inode);
1625err:
1626 return ERR_PTR(ret);
24ac23ab
TM		 1627}
1628
e23008ec
AA		 1629static struct nfs4_state *
1630nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1631{
1632 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1633 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1634 return _nfs4_opendata_to_nfs4_state(data);
1635}
1636
864472e9
TM		 1637static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1638{
1639 struct nfs_inode *nfsi = NFS_I(state->inode);
1640 struct nfs_open_context *ctx;
1641
1642 spin_lock(&state->inode->i_lock);
1643 list_for_each_entry(ctx, &nfsi->open_files, list) {
1644 if (ctx->state != state)
1645 continue;
1646 get_nfs_open_context(ctx);
1647 spin_unlock(&state->inode->i_lock);
1648 return ctx;
1649 }
1650 spin_unlock(&state->inode->i_lock);
1651 return ERR_PTR(-ENOENT);
1652}
1653
4a1c0893
TM		 1654static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1655 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1656{
1657 struct nfs4_opendata *opendata;
1658
4a1c0893 1659 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1660 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1661 if (opendata == NULL)
1662 return ERR_PTR(-ENOMEM);
1663 opendata->state = state;
1664 atomic_inc(&state->count);
1665 return opendata;
1666}
1667
24311f88
TM		 1668static int nfs4_open_recover_helper(struct nfs4_opendata *opendata,
1669 fmode_t fmode)
864472e9 1670{
2ced46c2 1671 struct nfs4_state *newstate;
864472e9
TM		 1672 int ret;
1673
24311f88 1674 if (!nfs4_mode_match_open_stateid(opendata->state, fmode))
39f897fd 1675 return 0;
dc0b027d
TM		 1676 opendata->o_arg.open_flags = 0;
1677 opendata->o_arg.fmode = fmode;
be36e185
TM		 1678 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1679 NFS_SB(opendata->dentry->d_sb),
1680 fmode, 0);
2ced46c2
TM		 1681 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1682 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1683 nfs4_init_opendata_res(opendata);
b257957e 1684 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1685 if (ret != 0)
1686 return ret;
2ced46c2 1687 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1688 if (IS_ERR(newstate))
1689 return PTR_ERR(newstate);
24311f88
TM		 1690 if (newstate != opendata->state)
1691 ret = -ESTALE;
643168c2 1692 nfs4_close_state(newstate, fmode);
24311f88 1693 return ret;
864472e9
TM		 1694}
1695
1696static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1697{
864472e9
TM		 1698 int ret;
1699
4f14c194
TM		 1700 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1701 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1702 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1703 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1704 /* memory barrier prior to reading state->n_* */
2ced46c2 1705 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1706 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9 1707 smp_rmb();
24311f88
TM		 1708 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1709 if (ret != 0)
1710 return ret;
1711 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1712 if (ret != 0)
1713 return ret;
1714 ret = nfs4_open_recover_helper(opendata, FMODE_READ);
1715 if (ret != 0)
1716 return ret;
1ac7e2fd
TM		 1717 /*
1718 * We may have performed cached opens for all three recoveries.
1719 * Check if we need to update the current stateid.
1720 */
1721 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1722 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1723 write_seqlock(&state->seqlock);
1ac7e2fd 1724 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1725 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1726 write_sequnlock(&state->seqlock);
1ac7e2fd 1727 }
864472e9
TM		 1728 return 0;
1729}
1730
1da177e4
LT		 1731/*
1732 * OPEN_RECLAIM:
1733 * reclaim state on the server after a reboot.
1da177e4 1734 */
539cd03a 1735static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1736{
1ac7e2fd 1737 struct nfs_delegation *delegation;
864472e9 1738 struct nfs4_opendata *opendata;
dc0b027d 1739 fmode_t delegation_type = 0;
1da177e4
LT		 1740 int status;
1741
4a1c0893
TM		 1742 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1743 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1744 if (IS_ERR(opendata))
1745 return PTR_ERR(opendata);
1ac7e2fd
TM		 1746 rcu_read_lock();
1747 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1748 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1749 delegation_type = delegation->type;
1ac7e2fd 1750 rcu_read_unlock();
864472e9
TM		 1751 opendata->o_arg.u.delegation_type = delegation_type;
1752 status = nfs4_open_recover(opendata, state);
c6d00e63 1753 nfs4_opendata_put(opendata);
1da177e4
LT		 1754 return status;
1755}
1756
539cd03a 1757static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1758{
1759 struct nfs_server *server = NFS_SERVER(state->inode);
1760 struct nfs4_exception exception = { };
1761 int err;
1762 do {
539cd03a 1763 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1764 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1765 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1766 continue;
168667c4 1767 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1768 break;
1769 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1770 } while (exception.retry);
1771 return err;
1772}
1773
864472e9
TM		 1774static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1775{
1776 struct nfs_open_context *ctx;
1777 int ret;
1778
1779 ctx = nfs4_state_find_open_context(state);
1780 if (IS_ERR(ctx))
91876b13 1781 return -EAGAIN;
539cd03a 1782 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1783 put_nfs_open_context(ctx);
1784 return ret;
1785}
1786
db4f2e63 1787static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1788{
be76b5b6
TM		 1789 switch (err) {
1790 default:
1791 printk(KERN_ERR "NFS: %s: unhandled error "
1792 "%d.\n", __func__, err);
1793 case 0:
1794 case -ENOENT:
8eee52af 1795 case -EAGAIN:
be76b5b6
TM		 1796 case -ESTALE:
1797 break;
1798 case -NFS4ERR_BADSESSION:
1799 case -NFS4ERR_BADSLOT:
1800 case -NFS4ERR_BAD_HIGH_SLOT:
1801 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1802 case -NFS4ERR_DEADSESSION:
1803 set_bit(NFS_DELEGATED_STATE, &state->flags);
1804 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1805 return -EAGAIN;
1806 case -NFS4ERR_STALE_CLIENTID:
1807 case -NFS4ERR_STALE_STATEID:
1808 set_bit(NFS_DELEGATED_STATE, &state->flags);
1809 case -NFS4ERR_EXPIRED:
1810 /* Don't recall a delegation if it was lost */
1811 nfs4_schedule_lease_recovery(server->nfs_client);
1812 return -EAGAIN;
352297b9
CL		 1813 case -NFS4ERR_MOVED:
1814 nfs4_schedule_migration_recovery(server);
1815 return -EAGAIN;
8ef2f8d4
CL		 1816 case -NFS4ERR_LEASE_MOVED:
1817 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1818 return -EAGAIN;
be76b5b6
TM		 1819 case -NFS4ERR_DELEG_REVOKED:
1820 case -NFS4ERR_ADMIN_REVOKED:
1821 case -NFS4ERR_BAD_STATEID:
db4f2e63 1822 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1823 nfs_inode_find_state_and_recover(state->inode,
1824 stateid);
1825 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1826 return -EAGAIN;
be76b5b6
TM		 1827 case -NFS4ERR_DELAY:
1828 case -NFS4ERR_GRACE:
1829 set_bit(NFS_DELEGATED_STATE, &state->flags);
1830 ssleep(1);
1831 return -EAGAIN;
db4f2e63
TM		 1832 case -ENOMEM:
1833 case -NFS4ERR_DENIED:
1834 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1835 return 0;
be76b5b6 1836 }
1da177e4
LT		 1837 return err;
1838}
1839
24311f88
TM		 1840int nfs4_open_delegation_recall(struct nfs_open_context *ctx,
1841 struct nfs4_state *state, const nfs4_stateid *stateid,
1842 fmode_t type)
db4f2e63
TM		 1843{
1844 struct nfs_server *server = NFS_SERVER(state->inode);
1845 struct nfs4_opendata *opendata;
24311f88 1846 int err = 0;
db4f2e63
TM		 1847
1848 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1849 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1850 if (IS_ERR(opendata))
1851 return PTR_ERR(opendata);
1852 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
5e99b532
JL		 1853 write_seqlock(&state->seqlock);
1854 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
1855 write_sequnlock(&state->seqlock);
24311f88
TM		 1856 clear_bit(NFS_DELEGATED_STATE, &state->flags);
1857 switch (type & (FMODE_READ|FMODE_WRITE)) {
1858 case FMODE_READ|FMODE_WRITE:
1859 case FMODE_WRITE:
1860 err = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE);
1861 if (err)
1862 break;
1863 err = nfs4_open_recover_helper(opendata, FMODE_WRITE);
1864 if (err)
1865 break;
1866 case FMODE_READ:
1867 err = nfs4_open_recover_helper(opendata, FMODE_READ);
1868 }
db4f2e63
TM		 1869 nfs4_opendata_put(opendata);
1870 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1871}
1872
be05c860
CL		 1873static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1874{
1875 struct nfs4_opendata *data = calldata;
1876
cb04ad2a
PT		 1877 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1878 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 1879}
1880
cdd4e68b
TM		 1881static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1882{
1883 struct nfs4_opendata *data = calldata;
1884
17ead6c8 1885 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1886
cdd4e68b 1887 data->rpc_status = task->tk_status;
26e976a8 1888 if (data->rpc_status == 0) {
f597c537 1889 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1890 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1891 renew_lease(data->o_res.server, data->timestamp);
3e309914 1892 data->rpc_done = 1;
26e976a8 1893 }
cdd4e68b
TM		 1894}
1895
1896static void nfs4_open_confirm_release(void *calldata)
1897{
1898 struct nfs4_opendata *data = calldata;
1899 struct nfs4_state *state = NULL;
1900
1901 /* If this request hasn't been cancelled, do nothing */
1902 if (data->cancelled == 0)
1903 goto out_free;
1904 /* In case of error, no cleanup! */
3e309914 1905 if (!data->rpc_done)
cdd4e68b 1906 goto out_free;
cdd4e68b 1907 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1908 if (!IS_ERR(state))
643168c2 1909 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1910out_free:
c6d00e63 1911 nfs4_opendata_put(data);
cdd4e68b
TM		 1912}
1913
1914static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1915 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1916 .rpc_call_done = nfs4_open_confirm_done,
1917 .rpc_release = nfs4_open_confirm_release,
1918};
1919
1920/*
1921 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1922 */
1923static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1924{
2b0143b5 1925 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 1926 struct rpc_task *task;
5138fde0
TM		 1927 struct rpc_message msg = {
1928 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1929 .rpc_argp = &data->c_arg,
1930 .rpc_resp = &data->c_res,
1931 .rpc_cred = data->owner->so_cred,
1932 };
c970aa85
TM		 1933 struct rpc_task_setup task_setup_data = {
1934 .rpc_client = server->client,
5138fde0 1935 .rpc_message = &msg,
c970aa85
TM		 1936 .callback_ops = &nfs4_open_confirm_ops,
1937 .callback_data = data,
101070ca 1938 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1939 .flags = RPC_TASK_ASYNC,
1940 };
1da177e4
LT		 1941 int status;
1942
17ead6c8 1943 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1944 kref_get(&data->kref);
3e309914
TM		 1945 data->rpc_done = 0;
1946 data->rpc_status = 0;
5138fde0 1947 data->timestamp = jiffies;
e92c1e0d
BC		 1948 if (data->is_recover)
1949 nfs4_set_sequence_privileged(&data->c_arg.seq_args);
c970aa85 1950 task = rpc_run_task(&task_setup_data);
7a1218a2 1951 if (IS_ERR(task))
cdd4e68b 1952 return PTR_ERR(task);
cdd4e68b
TM		 1953 status = nfs4_wait_for_completion_rpc_task(task);
1954 if (status != 0) {
1955 data->cancelled = 1;
1956 smp_wmb();
1957 } else
1958 status = data->rpc_status;
e6b3c4db 1959 rpc_put_task(task);
1da177e4
LT		 1960 return status;
1961}
1962
24ac23ab 1963static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1964{
24ac23ab
TM		 1965 struct nfs4_opendata *data = calldata;
1966 struct nfs4_state_owner *sp = data->owner;
549b19cc 1967 struct nfs_client *clp = sp->so_server->nfs_client;
2a606188 1968 enum open_claim_type4 claim = data->o_arg.claim;
5138fde0 1969
24ac23ab 1970 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1971 goto out_wait;
aac00a8d
TM		 1972 /*
1973 * Check if we still need to send an OPEN call, or if we can use
1974 * a delegation instead.
1975 */
1976 if (data->state != NULL) {
1977 struct nfs_delegation *delegation;
1978
dc0b027d 1979 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1980 goto out_no_action;
aac00a8d
TM		 1981 rcu_read_lock();
1982 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2a606188 1983 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
652f89f6 1984 goto unlock_no_action;
aac00a8d
TM		 1985 rcu_read_unlock();
1986 }
95b72eb0 1987 /* Update client id. */
549b19cc 1988 data->o_arg.clientid = clp->cl_clientid;
2a606188
TM		 1989 switch (claim) {
1990 default:
1991 break;
8188df17
TM		 1992 case NFS4_OPEN_CLAIM_PREVIOUS:
1993 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1994 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1995 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1996 case NFS4_OPEN_CLAIM_FH:
1997 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1998 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1999 }
26e976a8 2000 data->timestamp = jiffies;
035168ab 2001 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 2002 &data->o_arg.seq_args,
2240a9e2
TM		 2003 &data->o_res.seq_res,
2004 task) != 0)
2005 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 2006
2007 /* Set the create mode (note dependency on the session type) */
2008 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
2009 if (data->o_arg.open_flags & O_EXCL) {
2010 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
2011 if (nfs4_has_persistent_session(clp))
2012 data->o_arg.createmode = NFS4_CREATE_GUARDED;
2013 else if (clp->cl_mvops->minor_version > 0)
2014 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
2015 }
6ee41268 2016 return;
652f89f6
TM		 2017unlock_no_action:
2018 rcu_read_unlock();
6ee41268
TM		 2019out_no_action:
2020 task->tk_action = NULL;
c8da19b9 2021out_wait:
b75ad4cd 2022 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 2023}
2024
24ac23ab
TM		 2025static void nfs4_open_done(struct rpc_task *task, void *calldata)
2026{
2027 struct nfs4_opendata *data = calldata;
1da177e4 2028
24ac23ab 2029 data->rpc_status = task->tk_status;
d898528c 2030
14516c3a
TM		 2031 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
2032 return;
d898528c 2033
24ac23ab 2034 if (task->tk_status == 0) {
807d66d8
TM		 2035 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
2036 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 2037 case S_IFREG:
2038 break;
2039 case S_IFLNK:
24ac23ab 2040 data->rpc_status = -ELOOP;
6f926b5b
TM		 2041 break;
2042 case S_IFDIR:
24ac23ab 2043 data->rpc_status = -EISDIR;
6f926b5b
TM		 2044 break;
2045 default:
24ac23ab 2046 data->rpc_status = -ENOTDIR;
807d66d8 2047 }
6f926b5b 2048 }
26e976a8 2049 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 2050 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
2051 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 2052 }
3e309914 2053 data->rpc_done = 1;
24ac23ab 2054}
6f926b5b 2055
24ac23ab
TM		 2056static void nfs4_open_release(void *calldata)
2057{
2058 struct nfs4_opendata *data = calldata;
2059 struct nfs4_state *state = NULL;
2060
2061 /* If this request hasn't been cancelled, do nothing */
2062 if (data->cancelled == 0)
2063 goto out_free;
2064 /* In case of error, no cleanup! */
3e309914 2065 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 2066 goto out_free;
2067 /* In case we need an open_confirm, no cleanup! */
2068 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
2069 goto out_free;
24ac23ab 2070 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 2071 if (!IS_ERR(state))
643168c2 2072 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 2073out_free:
c6d00e63 2074 nfs4_opendata_put(data);
24ac23ab
TM		 2075}
2076
2077static const struct rpc_call_ops nfs4_open_ops = {
2078 .rpc_call_prepare = nfs4_open_prepare,
2079 .rpc_call_done = nfs4_open_done,
2080 .rpc_release = nfs4_open_release,
2081};
2082
b257957e 2083static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab 2084{
2b0143b5 2085 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 2086 struct nfs_server *server = NFS_SERVER(dir);
2087 struct nfs_openargs *o_arg = &data->o_arg;
2088 struct nfs_openres *o_res = &data->o_res;
2089 struct rpc_task *task;
5138fde0
TM		 2090 struct rpc_message msg = {
2091 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
2092 .rpc_argp = o_arg,
2093 .rpc_resp = o_res,
2094 .rpc_cred = data->owner->so_cred,
2095 };
c970aa85
TM		 2096 struct rpc_task_setup task_setup_data = {
2097 .rpc_client = server->client,
5138fde0 2098 .rpc_message = &msg,
c970aa85
TM		 2099 .callback_ops = &nfs4_open_ops,
2100 .callback_data = data,
101070ca 2101 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2102 .flags = RPC_TASK_ASYNC,
2103 };
24ac23ab
TM		 2104 int status;
2105
a9c92d6b 2106 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 2107 kref_get(&data->kref);
3e309914
TM		 2108 data->rpc_done = 0;
2109 data->rpc_status = 0;
2ced46c2 2110 data->cancelled = 0;
bdeca1b7
TM		 2111 data->is_recover = 0;
2112 if (isrecover) {
8fe72bac 2113 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 2114 data->is_recover = 1;
2115 }
c970aa85 2116 task = rpc_run_task(&task_setup_data);
b257957e
AB		 2117 if (IS_ERR(task))
2118 return PTR_ERR(task);
2119 status = nfs4_wait_for_completion_rpc_task(task);
2120 if (status != 0) {
2121 data->cancelled = 1;
2122 smp_wmb();
2123 } else
2124 status = data->rpc_status;
2125 rpc_put_task(task);
2126
2127 return status;
2128}
2129
2130static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2131{
2b0143b5 2132 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2133 struct nfs_openres *o_res = &data->o_res;
2134 int status;
2135
2136 status = nfs4_run_open_task(data, 1);
2137 if (status != 0 || !data->rpc_done)
2138 return status;
2139
6926afd1
TM		 2140 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2141
b257957e
AB		 2142 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2143 status = _nfs4_proc_open_confirm(data);
2144 if (status != 0)
2145 return status;
2146 }
2147
2148 return status;
2149}
2150
f3792d63
TM		 2151/*
2152 * Additional permission checks in order to distinguish between an
2153 * open for read, and an open for execute. This works around the
2154 * fact that NFSv4 OPEN treats read and execute permissions as being
2155 * the same.
2156 * Note that in the non-execute case, we want to turn off permission
2157 * checking if we just created a new file (POSIX open() semantics).
2158 */
6168f62c
WAA		 2159static int nfs4_opendata_access(struct rpc_cred *cred,
2160 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2161 struct nfs4_state *state, fmode_t fmode,
2162 int openflags)
6168f62c
WAA		 2163{
2164 struct nfs_access_entry cache;
2165 u32 mask;
2166
2167 /* access call failed or for some reason the server doesn't
2168 * support any access modes -- defer access call until later */
2169 if (opendata->o_res.access_supported == 0)
2170 return 0;
2171
2172 mask = 0;
f3792d63
TM		 2173 /*
2174 * Use openflags to check for exec, because fmode won't
2175 * always have FMODE_EXEC set when file open for exec.
2176 */
f8d9a897
WAA		 2177 if (openflags & __FMODE_EXEC) {
2178 /* ONLY check for exec rights */
2179 mask = MAY_EXEC;
f3792d63 2180 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2181 mask = MAY_READ;
6168f62c
WAA		 2182
2183 cache.cred = cred;
2184 cache.jiffies = jiffies;
2185 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2186 nfs_access_add_cache(state->inode, &cache);
2187
bbd3a8ee 2188 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2189 return 0;
2190
2191 /* even though OPEN succeeded, access is denied. Close the file */
2192 nfs4_close_state(state, fmode);
998f40b5 2193 return -EACCES;
6168f62c
WAA		 2194}
2195
b257957e
AB		 2196/*
2197 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2198 */
2199static int _nfs4_proc_open(struct nfs4_opendata *data)
2200{
2b0143b5 2201 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2202 struct nfs_server *server = NFS_SERVER(dir);
2203 struct nfs_openargs *o_arg = &data->o_arg;
2204 struct nfs_openres *o_res = &data->o_res;
2205 int status;
2206
2207 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2208 if (!data->rpc_done)
2209 return status;
2210 if (status != 0) {
2211 if (status == -NFS4ERR_BADNAME &&
2212 !(o_arg->open_flags & O_CREAT))
2213 return -ENOENT;
24ac23ab 2214 return status;
08ef7bd3 2215 }
24ac23ab 2216
6926afd1
TM		 2217 nfs_fattr_map_and_free_names(server, &data->f_attr);
2218
5bc2afc2 2219 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2220 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2221 if (o_arg->open_flags & O_EXCL)
2222 data->file_created = 1;
2223 else if (o_res->cinfo.before != o_res->cinfo.after)
2224 data->file_created = 1;
2225 }
0df5dd4a
TM		 2226 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2227 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2228 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2229 status = _nfs4_proc_open_confirm(data);
1da177e4 2230 if (status != 0)
24ac23ab 2231 return status;
1da177e4
LT		 2232 }
2233 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2234 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2235 return 0;
1da177e4
LT		 2236}
2237
d83217c1
AA		 2238static int nfs4_recover_expired_lease(struct nfs_server *server)
2239{
2240 return nfs4_client_recover_expired_lease(server->nfs_client);
2241}
2242
1da177e4
LT		 2243/*
2244 * OPEN_EXPIRED:
2245 * reclaim state on the server after a network partition.
2246 * Assumes caller holds the appropriate lock
2247 */
539cd03a 2248static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2249{
e56e0b78 2250 struct nfs4_opendata *opendata;
864472e9 2251 int ret;
1da177e4 2252
4a1c0893 2253 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2254 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2255 if (IS_ERR(opendata))
2256 return PTR_ERR(opendata);
864472e9 2257 ret = nfs4_open_recover(opendata, state);
35d05778 2258 if (ret == -ESTALE)
3d4ff43d 2259 d_drop(ctx->dentry);
c6d00e63 2260 nfs4_opendata_put(opendata);
864472e9 2261 return ret;
1da177e4
LT		 2262}
2263
a9ed2e25 2264static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2265{
539cd03a 2266 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2267 struct nfs4_exception exception = { };
2268 int err;
2269
2270 do {
539cd03a 2271 err = _nfs4_open_expired(ctx, state);
42113a75 2272 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2273 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2274 continue;
a9ed2e25
TM		 2275 switch (err) {
2276 default:
2277 goto out;
2278 case -NFS4ERR_GRACE:
2279 case -NFS4ERR_DELAY:
2280 nfs4_handle_exception(server, err, &exception);
2281 err = 0;
2282 }
202b50dc 2283 } while (exception.retry);
a9ed2e25 2284out:
202b50dc
TM		 2285 return err;
2286}
2287
1da177e4
LT		 2288static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2289{
1da177e4 2290 struct nfs_open_context *ctx;
864472e9 2291 int ret;
1da177e4 2292
864472e9
TM		 2293 ctx = nfs4_state_find_open_context(state);
2294 if (IS_ERR(ctx))
91876b13 2295 return -EAGAIN;
539cd03a 2296 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2297 put_nfs_open_context(ctx);
2298 return ret;
1da177e4
LT		 2299}
2300
4dfd4f7a
TM		 2301static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2302{
2303 nfs_remove_bad_delegation(state->inode);
2304 write_seqlock(&state->seqlock);
2305 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2306 write_sequnlock(&state->seqlock);
2307 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2308}
2309
2310static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2311{
2312 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2313 nfs_finish_clear_delegation_stateid(state);
2314}
2315
2316static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2317{
2318 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2319 nfs40_clear_delegation_stateid(state);
2320 return nfs4_open_expired(sp, state);
2321}
2322
f062eb6c 2323#if defined(CONFIG_NFS_V4_1)
0c116cad 2324static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2325{
f062eb6c 2326 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2327 nfs4_stateid stateid;
ab7cb0df 2328 struct nfs_delegation *delegation;
0c116cad
TM		 2329 struct rpc_cred *cred;
2330 int status;
3e60ffdd 2331
ab7cb0df
TM		 2332 /* Get the delegation credential for use by test/free_stateid */
2333 rcu_read_lock();
2334 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2335 if (delegation == NULL) {
ab7cb0df 2336 rcu_read_unlock();
0c116cad
TM		 2337 return;
2338 }
2339
2340 nfs4_stateid_copy(&stateid, &delegation->stateid);
2341 cred = get_rpccred(delegation->cred);
2342 rcu_read_unlock();
2343 status = nfs41_test_stateid(server, &stateid, cred);
2344 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df 2345
3e60ffdd
CL		 2346 if (status != NFS_OK) {
2347 /* Free the stateid unless the server explicitly
2348 * informs us the stateid is unrecognized. */
2349 if (status != -NFS4ERR_BAD_STATEID)
0c116cad
TM		 2350 nfs41_free_stateid(server, &stateid, cred);
2351 nfs_finish_clear_delegation_stateid(state);
3e60ffdd 2352 }
ab7cb0df 2353
0c116cad 2354 put_rpccred(cred);
3e60ffdd
CL		 2355}
2356
2357/**
2358 * nfs41_check_open_stateid - possibly free an open stateid
2359 *
2360 * @state: NFSv4 state for an inode
2361 *
2362 * Returns NFS_OK if recovery for this stateid is now finished.
2363 * Otherwise a negative NFS4ERR value is returned.
2364 */
2365static int nfs41_check_open_stateid(struct nfs4_state *state)
2366{
2367 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2368 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2369 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2370 int status;
2371
2372 /* If a state reset has been done, test_stateid is unneeded */
2373 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2374 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2375 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2376 return -NFS4ERR_BAD_STATEID;
2377
ab7cb0df 2378 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2379 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2380 if (status != NFS_OK) {
2381 /* Free the stateid unless the server explicitly
2382 * informs us the stateid is unrecognized. */
2383 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2384 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2385
2386 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2387 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2388 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2389 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2390 }
2391 return status;
2392}
2393
2394static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2395{
eb64cf96 2396 int status;
b01dd1d8 2397
0c116cad 2398 nfs41_check_delegation_stateid(state);
3e60ffdd 2399 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2400 if (status != NFS_OK)
2401 status = nfs4_open_expired(sp, state);
2402 return status;
f062eb6c
BS		 2403}
2404#endif
2405
aa53ed54
JL		 2406/*
2407 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2408 * fields corresponding to attributes that were used to store the verifier.
2409 * Make sure we clobber those fields in the later setattr call
2410 */
5334c5bd
KM		 2411static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata,
2412 struct iattr *sattr, struct nfs4_label **label)
aa53ed54 2413{
5334c5bd
KM		 2414 const u32 *attrset = opendata->o_res.attrset;
2415
2416 if ((attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
aa53ed54
JL		 2417 !(sattr->ia_valid & ATTR_ATIME_SET))
2418 sattr->ia_valid |= ATTR_ATIME;
2419
5334c5bd 2420 if ((attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
aa53ed54
JL		 2421 !(sattr->ia_valid & ATTR_MTIME_SET))
2422 sattr->ia_valid |= ATTR_MTIME;
5334c5bd
KM		 2423
2424 /* Except MODE, it seems harmless of setting twice. */
2425 if ((attrset[1] & FATTR4_WORD1_MODE))
2426 sattr->ia_valid &= ~ATTR_MODE;
2427
2428 if (attrset[2] & FATTR4_WORD2_SECURITY_LABEL)
2429 *label = NULL;
aa53ed54
JL		 2430}
2431
c21443c2
TM		 2432static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2433 fmode_t fmode,
2434 int flags,
3efb9722 2435 struct nfs_open_context *ctx)
c21443c2
TM		 2436{
2437 struct nfs4_state_owner *sp = opendata->owner;
2438 struct nfs_server *server = sp->so_server;
275bb307 2439 struct dentry *dentry;
c21443c2
TM		 2440 struct nfs4_state *state;
2441 unsigned int seq;
2442 int ret;
2443
2444 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2445
2446 ret = _nfs4_proc_open(opendata);
dca78001 2447 if (ret != 0)
c21443c2
TM		 2448 goto out;
2449
2450 state = nfs4_opendata_to_nfs4_state(opendata);
2451 ret = PTR_ERR(state);
2452 if (IS_ERR(state))
2453 goto out;
2454 if (server->caps & NFS_CAP_POSIX_LOCK)
2455 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2456
275bb307 2457 dentry = opendata->dentry;
2b0143b5 2458 if (d_really_is_negative(dentry)) {
275bb307
TM		 2459 /* FIXME: Is this d_drop() ever needed? */
2460 d_drop(dentry);
2461 dentry = d_add_unique(dentry, igrab(state->inode));
2462 if (dentry == NULL) {
2463 dentry = opendata->dentry;
2464 } else if (dentry != ctx->dentry) {
2465 dput(ctx->dentry);
2466 ctx->dentry = dget(dentry);
2467 }
2468 nfs_set_verifier(dentry,
2b0143b5 2469 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2470 }
2471
c21443c2
TM		 2472 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2473 if (ret != 0)
2474 goto out;
2475
3efb9722 2476 ctx->state = state;
2b0143b5 2477 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2478 nfs_inode_attach_open_context(ctx);
2479 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2480 nfs4_schedule_stateid_recovery(server, state);
2481 }
c21443c2
TM		 2482out:
2483 return ret;
2484}
2485
1da177e4 2486/*
24ac23ab 2487 * Returns a referenced nfs4_state
1da177e4 2488 */
82be417a 2489static int _nfs4_do_open(struct inode *dir,
4197a055 2490 struct nfs_open_context *ctx,
82be417a
AA		 2491 int flags,
2492 struct iattr *sattr,
5bc2afc2
TM		 2493 struct nfs4_label *label,
2494 int *opened)
1da177e4
LT		 2495{
2496 struct nfs4_state_owner *sp;
2497 struct nfs4_state *state = NULL;
2498 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2499 struct nfs4_opendata *opendata;
4197a055
TM		 2500 struct dentry *dentry = ctx->dentry;
2501 struct rpc_cred *cred = ctx->cred;
2502 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2503 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2504 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2505 struct nfs4_label *olabel = NULL;
aac00a8d 2506 int status;
1da177e4
LT		 2507
2508 /* Protect against reboot recovery conflicts */
1da177e4 2509 status = -ENOMEM;
d1e284d5
TM		 2510 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2511 if (sp == NULL) {
1da177e4
LT		 2512 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2513 goto out_err;
2514 }
58d9714a
TM		 2515 status = nfs4_recover_expired_lease(server);
2516 if (status != 0)
b4454fe1 2517 goto err_put_state_owner;
2b0143b5
DH		 2518 if (d_really_is_positive(dentry))
2519 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2520 status = -ENOMEM;
2b0143b5 2521 if (d_really_is_positive(dentry))
49f9a0fa 2522 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2523 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2524 label, claim, GFP_KERNEL);
e56e0b78 2525 if (opendata == NULL)
95d35cb4 2526 goto err_put_state_owner;
1da177e4 2527
14c43f76
DQ		 2528 if (label) {
2529 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2530 if (IS_ERR(olabel)) {
2531 status = PTR_ERR(olabel);
2532 goto err_opendata_put;
2533 }
2534 }
2535
e911b815
TM		 2536 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2537 if (!opendata->f_attr.mdsthreshold) {
2538 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2539 if (!opendata->f_attr.mdsthreshold)
2540 goto err_free_label;
2541 }
1549210f 2542 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2543 }
2b0143b5
DH		 2544 if (d_really_is_positive(dentry))
2545 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2546
3efb9722 2547 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2548 if (status != 0)
14c43f76 2549 goto err_free_label;
3efb9722 2550 state = ctx->state;
6168f62c 2551
efcbc04e 2552 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 2553 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
5334c5bd 2554 nfs4_exclusive_attrset(opendata, sattr, &label);
0ab64e0e
TM		 2555
2556 nfs_fattr_init(opendata->o_res.f_attr);
2557 status = nfs4_do_setattr(state->inode, cred,
2558 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2559 state, label, olabel);
2560 if (status == 0) {
f044636d
TM		 2561 nfs_setattr_update_inode(state->inode, sattr,
2562 opendata->o_res.f_attr);
aa9c2669 2563 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2564 }
0ab64e0e 2565 }
c5c3fb5f 2566 if (opened && opendata->file_created)
5bc2afc2 2567 *opened |= FILE_CREATED;
82be417a 2568
e911b815 2569 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2570 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2571 opendata->f_attr.mdsthreshold = NULL;
2572 }
82be417a 2573
14c43f76
DQ		 2574 nfs4_label_free(olabel);
2575
c6d00e63 2576 nfs4_opendata_put(opendata);
1da177e4 2577 nfs4_put_state_owner(sp);
1da177e4 2578 return 0;
14c43f76
DQ		 2579err_free_label:
2580 nfs4_label_free(olabel);
c6d00e63
TM		 2581err_opendata_put:
2582 nfs4_opendata_put(opendata);
e56e0b78
TM		 2583err_put_state_owner:
2584 nfs4_put_state_owner(sp);
1da177e4 2585out_err:
1da177e4
LT		 2586 return status;
2587}
2588
2589
82be417a 2590static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2591 struct nfs_open_context *ctx,
82be417a
AA		 2592 int flags,
2593 struct iattr *sattr,
5bc2afc2
TM		 2594 struct nfs4_label *label,
2595 int *opened)
1da177e4 2596{
49f9a0fa 2597 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2598 struct nfs4_exception exception = { };
2599 struct nfs4_state *res;
2600 int status;
2601
2602 do {
5bc2afc2 2603 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2604 res = ctx->state;
42113a75 2605 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2606 if (status == 0)
2607 break;
2608 /* NOTE: BAD_SEQID means the server and client disagree about the
2609 * book-keeping w.r.t. state-changing operations
2610 * (OPEN/CLOSE/LOCK/LOCKU...)
2611 * It is actually a sign of a bug on the client or on the server.
2612 *
2613 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2614 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2615 * have unhashed the old state_owner for us, and that we can
2616 * therefore safely retry using a new one. We should still warn
2617 * the user though...
2618 */
2619 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2620 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2621 " returned a bad sequence-id error!\n",
2622 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2623 exception.retry = 1;
2624 continue;
2625 }
550f5747
TM		 2626 /*
2627 * BAD_STATEID on OPEN means that the server cancelled our
2628 * state before it received the OPEN_CONFIRM.
2629 * Recover by retrying the request as per the discussion
2630 * on Page 181 of RFC3530.
2631 */
2632 if (status == -NFS4ERR_BAD_STATEID) {
2633 exception.retry = 1;
2634 continue;
2635 }
aac00a8d
TM		 2636 if (status == -EAGAIN) {
2637 /* We must have found a delegation */
2638 exception.retry = 1;
2639 continue;
2640 }
49f9a0fa
TM		 2641 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2642 continue;
2643 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2644 status, &exception));
2645 } while (exception.retry);
2646 return res;
2647}
2648
659bfcd6
TM		 2649static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2650 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2651 struct nfs4_state *state, struct nfs4_label *ilabel,
2652 struct nfs4_label *olabel)
1da177e4 2653{
3e4f6290 2654 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2655 struct nfs_setattrargs arg = {
3e4f6290 2656 .fh = NFS_FH(inode),
1da177e4
LT		 2657 .iap = sattr,
2658 .server = server,
2659 .bitmask = server->attr_bitmask,
1775fd3e 2660 .label = ilabel,
1da177e4
LT		 2661 };
2662 struct nfs_setattrres res = {
2663 .fattr = fattr,
1775fd3e 2664 .label = olabel,
1da177e4
LT		 2665 .server = server,
2666 };
2667 struct rpc_message msg = {
659bfcd6
TM		 2668 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2669 .rpc_argp = &arg,
2670 .rpc_resp = &res,
2671 .rpc_cred = cred,
1da177e4 2672 };
26e976a8 2673 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2674 fmode_t fmode;
2675 bool truncate;
65e4308d 2676 int status;
1da177e4 2677
aa9c2669
DQ		 2678 arg.bitmask = nfs4_bitmask(server, ilabel);
2679 if (ilabel)
2680 arg.bitmask = nfs4_bitmask(server, olabel);
2681
0e574af1 2682 nfs_fattr_init(fattr);
1da177e4 2683
ee3ae84e
TM		 2684 /* Servers should only apply open mode checks for file size changes */
2685 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2686 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2687
2688 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2689 /* Use that stateid */
0418dae1 2690 } else if (truncate && state != NULL) {
2a369153
TM		 2691 struct nfs_lockowner lockowner = {
2692 .l_owner = current->files,
2693 .l_pid = current->tgid,
2694 };
0418dae1
TM		 2695 if (!nfs4_valid_open_stateid(state))
2696 return -EBADF;
2697 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2698 &lockowner) == -EIO)
2699 return -EBADF;
08e9eac4 2700 } else
f597c537 2701 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2702
7c513058 2703 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2704 if (status == 0 && state != NULL)
2705 renew_lease(server, timestamp);
65e4308d 2706 return status;
1da177e4
LT		 2707}
2708
659bfcd6
TM		 2709static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2710 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2711 struct nfs4_state *state, struct nfs4_label *ilabel,
2712 struct nfs4_label *olabel)
1da177e4 2713{
3e4f6290 2714 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2715 struct nfs4_exception exception = {
2716 .state = state,
3114ea7a 2717 .inode = inode,
a1d0b5ee 2718 };
1da177e4
LT		 2719 int err;
2720 do {
1775fd3e 2721 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2722 trace_nfs4_setattr(inode, err);
451146be
TM		 2723 switch (err) {
2724 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2725 if (!(sattr->ia_valid & ATTR_SIZE)) {
2726 pr_warn_once("NFSv4: server %s is incorrectly "
2727 "applying open mode checks to "
2728 "a SETATTR that is not "
2729 "changing file size.\n",
2730 server->nfs_client->cl_hostname);
2731 }
451146be
TM		 2732 if (state && !(state->state & FMODE_WRITE)) {
2733 err = -EBADF;
2734 if (sattr->ia_valid & ATTR_OPEN)
2735 err = -EACCES;
2736 goto out;
2737 }
2738 }
2739 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2740 } while (exception.retry);
451146be 2741out:
1da177e4
LT		 2742 return err;
2743}
2744
500d701f
PT		 2745static bool
2746nfs4_wait_on_layoutreturn(struct inode *inode, struct rpc_task *task)
2747{
2748 if (inode == NULL || !nfs_have_layout(inode))
2749 return false;
2750
2751 return pnfs_wait_on_layoutreturn(inode, task);
2752}
2753
1da177e4
LT		 2754struct nfs4_closedata {
2755 struct inode *inode;
2756 struct nfs4_state *state;
2757 struct nfs_closeargs arg;
2758 struct nfs_closeres res;
516a6af6 2759 struct nfs_fattr fattr;
26e976a8 2760 unsigned long timestamp;
f7e8917a
FI		 2761 bool roc;
2762 u32 roc_barrier;
1da177e4
LT		 2763};
2764
963d8fe5 2765static void nfs4_free_closedata(void *data)
9512135d 2766{
963d8fe5
TM		 2767 struct nfs4_closedata *calldata = data;
2768 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2769 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2770
f7e8917a
FI		 2771 if (calldata->roc)
2772 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2773 nfs4_put_open_state(calldata->state);
2774 nfs_free_seqid(calldata->arg.seqid);
9512135d 2775 nfs4_put_state_owner(sp);
322b2b90 2776 nfs_sb_deactive(sb);
9512135d
TM		 2777 kfree(calldata);
2778}
2779
963d8fe5 2780static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2781{
963d8fe5 2782 struct nfs4_closedata *calldata = data;
1da177e4 2783 struct nfs4_state *state = calldata->state;
1da177e4 2784 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2785 nfs4_stateid *res_stateid = NULL;
1da177e4 2786
a3ca5651 2787 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2788 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2789 return;
42113a75 2790 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2791 /* hmm. we are done with the inode, and in the process of freeing
2792 * the state_owner. we keep this around to process errors
2793 */
1da177e4
LT		 2794 switch (task->tk_status) {
2795 case 0:
412f6c4c 2796 res_stateid = &calldata->res.stateid;
3c13cb5b 2797 if (calldata->roc)
f7e8917a
FI		 2798 pnfs_roc_set_barrier(state->inode,
2799 calldata->roc_barrier);
26e976a8 2800 renew_lease(server, calldata->timestamp);
412f6c4c 2801 break;
69794ad7 2802 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2803 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2804 case -NFS4ERR_OLD_STATEID:
2805 case -NFS4ERR_BAD_STATEID:
1da177e4 2806 case -NFS4ERR_EXPIRED:
566fcec6 2807 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 2808 &state->open_stateid)) {
566fcec6
TM		 2809 rpc_restart_call_prepare(task);
2810 goto out_release;
2811 }
dc0b027d 2812 if (calldata->arg.fmode == 0)
9e33bed5 2813 break;
1da177e4 2814 default:
8478eaa1 2815 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 2816 rpc_restart_call_prepare(task);
69794ad7
TM		 2817 goto out_release;
2818 }
1da177e4 2819 }
4a1e2feb
TM		 2820 nfs_clear_open_stateid(state, &calldata->arg.stateid,
2821 res_stateid, calldata->arg.fmode);
69794ad7 2822out_release:
72211dbe 2823 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2824 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2825 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2826}
2827
4ce70ada 2828static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2829{
4ce70ada 2830 struct nfs4_closedata *calldata = data;
9512135d 2831 struct nfs4_state *state = calldata->state;
7fdab069 2832 struct inode *inode = calldata->inode;
aee7af35 2833 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2834 int call_close = 0;
9512135d 2835
a3ca5651 2836 dprintk("%s: begin!\n", __func__);
963d8fe5 2837 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2838 goto out_wait;
003707c7 2839
88069f77 2840 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2841 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2842 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2843 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2844 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 2845 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 2846 /* Calculate the change in open mode */
cd9288ff 2847 calldata->arg.fmode = 0;
e7616923 2848 if (state->n_rdwr == 0) {
cd9288ff
TM		 2849 if (state->n_rdonly == 0)
2850 call_close |= is_rdonly;
2851 else if (is_rdonly)
2852 calldata->arg.fmode |= FMODE_READ;
2853 if (state->n_wronly == 0)
2854 call_close |= is_wronly;
2855 else if (is_wronly)
2856 calldata->arg.fmode |= FMODE_WRITE;
2857 } else if (is_rdwr)
2858 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2859
2860 if (calldata->arg.fmode == 0)
2861 call_close |= is_rdwr;
2862
5d422301
TM		 2863 if (!nfs4_valid_open_stateid(state))
2864 call_close = 0;
4cecb76f 2865 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2866
2867 if (!call_close) {
963d8fe5 2868 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2869 goto out_no_action;
9512135d 2870 }
88069f77 2871
500d701f
PT		 2872 if (nfs4_wait_on_layoutreturn(inode, task)) {
2873 nfs_release_seqid(calldata->arg.seqid);
2874 goto out_wait;
2875 }
2876
3c13cb5b 2877 if (calldata->arg.fmode == 0)
88069f77 2878 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3c13cb5b
TM		 2879 if (calldata->roc)
2880 pnfs_roc_get_barrier(inode, &calldata->roc_barrier);
2881
6ae37339
TM		 2882 calldata->arg.share_access =
2883 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2884 calldata->arg.fmode, 0);
88069f77 2885
516a6af6 2886 nfs_fattr_init(calldata->res.fattr);
26e976a8 2887 calldata->timestamp = jiffies;
7fdab069 2888 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2889 &calldata->arg.seq_args,
2890 &calldata->res.seq_res,
2240a9e2
TM		 2891 task) != 0)
2892 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2893 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2894 return;
2895out_no_action:
2896 task->tk_action = NULL;
2897out_wait:
2898 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2899}
2900
963d8fe5 2901static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2902 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2903 .rpc_call_done = nfs4_close_done,
2904 .rpc_release = nfs4_free_closedata,
2905};
2906
fe08c546
PT		 2907static bool nfs4_roc(struct inode *inode)
2908{
40dd4b7a 2909 if (!nfs_have_layout(inode))
fe08c546 2910 return false;
fe08c546
PT		 2911 return pnfs_roc(inode);
2912}
2913
1da177e4
LT		 2914/*
2915 * It is possible for data to be read/written from a mem-mapped file
2916 * after the sys_close call (which hits the vfs layer as a flush).
2917 * This means that we can't safely call nfsv4 close on a file until
2918 * the inode is cleared. This in turn means that we are not good
2919 * NFSv4 citizens - we do not indicate to the server to update the file's
2920 * share state even when we are done with one of the three share
2921 * stateid's in the inode.
2922 *
2923 * NOTE: Caller must be holding the sp->so_owner semaphore!
2924 */
1f7977c1 2925int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2926{
4a35bd41 2927 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 2928 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 2929 struct nfs4_closedata *calldata;
b39e625b
TM		 2930 struct nfs4_state_owner *sp = state->owner;
2931 struct rpc_task *task;
5138fde0
TM		 2932 struct rpc_message msg = {
2933 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2934 .rpc_cred = state->owner->so_cred,
2935 };
c970aa85
TM		 2936 struct rpc_task_setup task_setup_data = {
2937 .rpc_client = server->client,
5138fde0 2938 .rpc_message = &msg,
c970aa85 2939 .callback_ops = &nfs4_close_ops,
101070ca 2940 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2941 .flags = RPC_TASK_ASYNC,
2942 };
9512135d 2943 int status = -ENOMEM;
1da177e4 2944
fa940720
WAA		 2945 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2946 &task_setup_data.rpc_client, &msg);
2947
8535b2be 2948 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2949 if (calldata == NULL)
9512135d 2950 goto out;
a9c92d6b 2951 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2952 calldata->inode = state->inode;
1da177e4 2953 calldata->state = state;
4a35bd41 2954 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 2955 /* Serialization for the sequence id */
63f5f796
TM		 2956 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2957 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 2958 if (IS_ERR(calldata->arg.seqid))
9512135d 2959 goto out_free_calldata;
dc0b027d 2960 calldata->arg.fmode = 0;
a65318bf 2961 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2962 calldata->res.fattr = &calldata->fattr;
c1d51931 2963 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2964 calldata->res.server = server;
fe08c546 2965 calldata->roc = nfs4_roc(state->inode);
643168c2 2966 nfs_sb_active(calldata->inode->i_sb);
9512135d 2967
1174dd1f
TM		 2968 msg.rpc_argp = &calldata->arg;
2969 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2970 task_setup_data.callback_data = calldata;
2971 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2972 if (IS_ERR(task))
2973 return PTR_ERR(task);
a49c3c77
TM		 2974 status = 0;
2975 if (wait)
2976 status = rpc_wait_for_completion_task(task);
b39e625b 2977 rpc_put_task(task);
a49c3c77 2978 return status;
9512135d
TM		 2979out_free_calldata:
2980 kfree(calldata);
2981out:
b39e625b
TM		 2982 nfs4_put_open_state(state);
2983 nfs4_put_state_owner(sp);
9512135d 2984 return status;
1da177e4
LT		 2985}
2986
2b484297 2987static struct inode *
5bc2afc2
TM		 2988nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2989 int open_flags, struct iattr *attr, int *opened)
1da177e4 2990{
1da177e4 2991 struct nfs4_state *state;
aa9c2669
DQ		 2992 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2993
2994 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2995
565277f6 2996 /* Protect against concurrent sillydeletes */
5bc2afc2 2997 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2998
2999 nfs4_label_release_security(label);
3000
f46e0bd3
TM		 3001 if (IS_ERR(state))
3002 return ERR_CAST(state);
275bb307 3003 return state->inode;
1da177e4
LT		 3004}
3005
1185a552 3006static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 3007{
3008 if (ctx->state == NULL)
3009 return;
3010 if (is_sync)
643168c2 3011 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 3012 else
643168c2 3013 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 3014}
1da177e4 3015
b944dba3
TM		 3016#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
3017#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 3018#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 3019
1da177e4
LT		 3020static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
3021{
8c61282f 3022 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 3023 struct nfs4_server_caps_arg args = {
3024 .fhandle = fhandle,
8c61282f 3025 .bitmask = bitmask,
43652ad5 3026 };
1da177e4
LT		 3027 struct nfs4_server_caps_res res = {};
3028 struct rpc_message msg = {
3029 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 3030 .rpc_argp = &args,
1da177e4
LT		 3031 .rpc_resp = &res,
3032 };
3033 int status;
3034
8c61282f
KM		 3035 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
3036 FATTR4_WORD0_FH_EXPIRE_TYPE |
3037 FATTR4_WORD0_LINK_SUPPORT |
3038 FATTR4_WORD0_SYMLINK_SUPPORT |
3039 FATTR4_WORD0_ACLSUPPORT;
3040 if (minorversion)
3041 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
3042
7c513058 3043 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3044 if (status == 0) {
b944dba3 3045 /* Sanity check the server answers */
8c61282f 3046 switch (minorversion) {
b944dba3
TM		 3047 case 0:
3048 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
3049 res.attr_bitmask[2] = 0;
3050 break;
3051 case 1:
3052 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
3053 break;
3054 case 2:
3055 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
3056 }
1da177e4 3057 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 3058 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
3059 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
3060 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
3061 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 3062 NFS_CAP_CTIME|NFS_CAP_MTIME|
3063 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 3064 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
3065 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 3066 server->caps |= NFS_CAP_ACLS;
3067 if (res.has_links != 0)
3068 server->caps |= NFS_CAP_HARDLINKS;
3069 if (res.has_symlinks != 0)
3070 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 3071 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
3072 server->caps |= NFS_CAP_FILEID;
3073 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
3074 server->caps |= NFS_CAP_MODE;
3075 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
3076 server->caps |= NFS_CAP_NLINK;
3077 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
3078 server->caps |= NFS_CAP_OWNER;
3079 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
3080 server->caps |= NFS_CAP_OWNER_GROUP;
3081 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
3082 server->caps |= NFS_CAP_ATIME;
3083 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
3084 server->caps |= NFS_CAP_CTIME;
3085 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
3086 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 3087#ifdef CONFIG_NFS_V4_SECURITY_LABEL
3088 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
3089 server->caps |= NFS_CAP_SECURITY_LABEL;
3090#endif
3091 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
3092 sizeof(server->attr_bitmask));
b944dba3 3093 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 3094
a65318bf
TM		 3095 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
3096 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
3097 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 3098 server->cache_consistency_bitmask[2] = 0;
8c61282f
KM		 3099 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
3100 sizeof(server->exclcreat_bitmask));
1da177e4 3101 server->acl_bitmask = res.acl_bitmask;
264e6351 3102 server->fh_expire_type = res.fh_expire_type;
1da177e4 3103 }
cccef3b9 3104
1da177e4
LT		 3105 return status;
3106}
3107
55a97593 3108int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 3109{
3110 struct nfs4_exception exception = { };
3111 int err;
3112 do {
3113 err = nfs4_handle_exception(server,
3114 _nfs4_server_capabilities(server, fhandle),
3115 &exception);
3116 } while (exception.retry);
3117 return err;
3118}
3119
3120static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3121 struct nfs_fsinfo *info)
3122{
aa9c2669 3123 u32 bitmask[3];
1da177e4 3124 struct nfs4_lookup_root_arg args = {
aa9c2669 3125 .bitmask = bitmask,
1da177e4
LT		 3126 };
3127 struct nfs4_lookup_res res = {
3128 .server = server,
0e574af1 3129 .fattr = info->fattr,
1da177e4
LT		 3130 .fh = fhandle,
3131 };
3132 struct rpc_message msg = {
3133 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3134 .rpc_argp = &args,
3135 .rpc_resp = &res,
3136 };
008f55d0 3137
aa9c2669
DQ		 3138 bitmask[0] = nfs4_fattr_bitmap[0];
3139 bitmask[1] = nfs4_fattr_bitmap[1];
3140 /*
3141 * Process the label in the upcoming getfattr
3142 */
3143 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3144
0e574af1 3145 nfs_fattr_init(info->fattr);
7c513058 3146 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3147}
3148
3149static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3150 struct nfs_fsinfo *info)
3151{
3152 struct nfs4_exception exception = { };
3153 int err;
3154 do {
fb8a5ba8 3155 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3156 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3157 switch (err) {
3158 case 0:
3159 case -NFS4ERR_WRONGSEC:
05e9cfb4 3160 goto out;
fb8a5ba8
BS		 3161 default:
3162 err = nfs4_handle_exception(server, err, &exception);
3163 }
1da177e4 3164 } while (exception.retry);
05e9cfb4 3165out:
1da177e4
LT		 3166 return err;
3167}
3168
8f70e95f
BS		 3169static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3170 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3171{
c2190661
TM		 3172 struct rpc_auth_create_args auth_args = {
3173 .pseudoflavor = flavor,
3174 };
8f70e95f
BS		 3175 struct rpc_auth *auth;
3176 int ret;
3177
c2190661 3178 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3179 if (IS_ERR(auth)) {
75bc8821 3180 ret = -EACCES;
8f70e95f
BS		 3181 goto out;
3182 }
3183 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3184out:
3185 return ret;
3186}
3187
9a744ba3
CL		 3188/*
3189 * Retry pseudoroot lookup with various security flavors. We do this when:
3190 *
3191 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3192 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3193 *
3194 * Returns zero on success, or a negative NFS4ERR value, or a
3195 * negative errno value.
3196 */
801a16dc 3197static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3198 struct nfs_fsinfo *info)
1da177e4 3199{
9a744ba3
CL		 3200 /* Per 3530bis 15.33.5 */
3201 static const rpc_authflavor_t flav_array[] = {
3202 RPC_AUTH_GSS_KRB5P,
3203 RPC_AUTH_GSS_KRB5I,
3204 RPC_AUTH_GSS_KRB5,
c4eafe11 3205 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3206 RPC_AUTH_NULL,
3207 };
3208 int status = -EPERM;
3209 size_t i;
6a1a1e34 3210
4d4b69dd
WAA		 3211 if (server->auth_info.flavor_len > 0) {
3212 /* try each flavor specified by user */
3213 for (i = 0; i < server->auth_info.flavor_len; i++) {
3214 status = nfs4_lookup_root_sec(server, fhandle, info,
3215 server->auth_info.flavors[i]);
3216 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3217 continue;
3218 break;
3219 }
3220 } else {
3221 /* no flavors specified by user, try default list */
3222 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3223 status = nfs4_lookup_root_sec(server, fhandle, info,
3224 flav_array[i]);
3225 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3226 continue;
3227 break;
3228 }
8f70e95f 3229 }
9a744ba3 3230
fb8a5ba8
BS		 3231 /*
3232 * -EACCESS could mean that the user doesn't have correct permissions
3233 * to access the mount. It could also mean that we tried to mount
3234 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3235 * existing mount programs don't handle -EACCES very well so it should
3236 * be mapped to -EPERM instead.
3237 */
3238 if (status == -EACCES)
3239 status = -EPERM;
801a16dc
BS		 3240 return status;
3241}
3242
2ed4b95b
CL		 3243static int nfs4_do_find_root_sec(struct nfs_server *server,
3244 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3245{
3246 int mv = server->nfs_client->cl_minorversion;
3247 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3248}
3249
3250/**
3251 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3252 * @server: initialized nfs_server handle
3253 * @fhandle: we fill in the pseudo-fs root file handle
3254 * @info: we fill in an FSINFO struct
5e6b1990 3255 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3256 *
3257 * Returns zero on success, or a negative errno.
801a16dc 3258 */
3028eb2b 3259int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3260 struct nfs_fsinfo *info,
3261 bool auth_probe)
801a16dc 3262{
c7757074 3263 int status = 0;
2ed4b95b 3264
c7757074 3265 if (!auth_probe)
5e6b1990 3266 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3267
3268 if (auth_probe || status == NFS4ERR_WRONGSEC)
2ed4b95b
CL		 3269 status = nfs4_do_find_root_sec(server, fhandle, info);
3270
1da177e4
LT		 3271 if (status == 0)
3272 status = nfs4_server_capabilities(server, fhandle);
3273 if (status == 0)
3274 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3275
c12e87f4 3276 return nfs4_map_errors(status);
1da177e4
LT		 3277}
3278
bae36241
BS		 3279static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3280 struct nfs_fsinfo *info)
3281{
3282 int error;
3283 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3284 struct nfs4_label *label = NULL;
bae36241
BS		 3285
3286 error = nfs4_server_capabilities(server, mntfh);
3287 if (error < 0) {
3288 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3289 return error;
3290 }
3291
14c43f76
DQ		 3292 label = nfs4_label_alloc(server, GFP_KERNEL);
3293 if (IS_ERR(label))
3294 return PTR_ERR(label);
3295
1775fd3e 3296 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3297 if (error < 0) {
3298 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3299 goto err_free_label;
bae36241
BS		 3300 }
3301
3302 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3303 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3304 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3305
14c43f76
DQ		 3306err_free_label:
3307 nfs4_label_free(label);
3308
bae36241
BS		 3309 return error;
3310}
3311
6b97fd3d
MN		 3312/*
3313 * Get locations and (maybe) other attributes of a referral.
3314 * Note that we'll actually follow the referral later when
3315 * we detect fsid mismatch in inode revalidation
3316 */
f05d147f
BS		 3317static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3318 const struct qstr *name, struct nfs_fattr *fattr,
3319 struct nfs_fh *fhandle)
6b97fd3d
MN		 3320{
3321 int status = -ENOMEM;
3322 struct page *page = NULL;
3323 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3324
3325 page = alloc_page(GFP_KERNEL);
3326 if (page == NULL)
3327 goto out;
3328 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3329 if (locations == NULL)
3330 goto out;
3331
f05d147f 3332 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3333 if (status != 0)
3334 goto out;
519ae255
CL		 3335
3336 /*
3337 * If the fsid didn't change, this is a migration event, not a
3338 * referral. Cause us to drop into the exception handler, which
3339 * will kick off migration recovery.
3340 */
6b97fd3d 3341 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3342 dprintk("%s: server did not return a different fsid for"
3343 " a referral at %s\n", __func__, name->name);
519ae255 3344 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3345 goto out;
3346 }
533eb461
AA		 3347 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3348 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3349
533eb461 3350 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3351 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3352 memset(fhandle, 0, sizeof(struct nfs_fh));
3353out:
3354 if (page)
3355 __free_page(page);
5d7ca35a 3356 kfree(locations);
6b97fd3d
MN		 3357 return status;
3358}
3359
1775fd3e
DQ		 3360static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3361 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3362{
3363 struct nfs4_getattr_arg args = {
3364 .fh = fhandle,
3365 .bitmask = server->attr_bitmask,
3366 };
3367 struct nfs4_getattr_res res = {
3368 .fattr = fattr,
1775fd3e 3369 .label = label,
1da177e4
LT		 3370 .server = server,
3371 };
3372 struct rpc_message msg = {
3373 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3374 .rpc_argp = &args,
3375 .rpc_resp = &res,
3376 };
aa9c2669
DQ		 3377
3378 args.bitmask = nfs4_bitmask(server, label);
3379
0e574af1 3380 nfs_fattr_init(fattr);
7c513058 3381 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3382}
3383
1775fd3e
DQ		 3384static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3385 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3386{
3387 struct nfs4_exception exception = { };
3388 int err;
3389 do {
b5f875a9
TM		 3390 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3391 trace_nfs4_getattr(server, fhandle, fattr, err);
3392 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3393 &exception);
3394 } while (exception.retry);
3395 return err;
3396}
3397
3398/*
3399 * The file is not closed if it is opened due to the a request to change
3400 * the size of the file. The open call will not be needed once the
3401 * VFS layer lookup-intents are implemented.
3402 *
3403 * Close is called when the inode is destroyed.
3404 * If we haven't opened the file for O_WRONLY, we
3405 * need to in the size_change case to obtain a stateid.
3406 *
3407 * Got race?
3408 * Because OPEN is always done by name in nfsv4, it is
3409 * possible that we opened a different file by the same
3410 * name. We can recognize this race condition, but we
3411 * can't do anything about it besides returning an error.
3412 *
3413 * This will be fixed with VFS changes (lookup-intent).
3414 */
3415static int
3416nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3417 struct iattr *sattr)
3418{
2b0143b5 3419 struct inode *inode = d_inode(dentry);
659bfcd6 3420 struct rpc_cred *cred = NULL;
d530838b 3421 struct nfs4_state *state = NULL;
14c43f76 3422 struct nfs4_label *label = NULL;
1da177e4
LT		 3423 int status;
3424
88ac815c
PT		 3425 if (pnfs_ld_layoutret_on_setattr(inode) &&
3426 sattr->ia_valid & ATTR_SIZE &&
3427 sattr->ia_size < i_size_read(inode))
24028672 3428 pnfs_commit_and_return_layout(inode);
8a1636c4 3429
0e574af1 3430 nfs_fattr_init(fattr);
1da177e4 3431
2669940d
AA		 3432 /* Deal with open(O_TRUNC) */
3433 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3434 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3435
3436 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3437 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3438 return 0;
3439
d530838b 3440 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3441 if (sattr->ia_valid & ATTR_FILE) {
3442 struct nfs_open_context *ctx;
3443
3444 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3445 if (ctx) {
3446 cred = ctx->cred;
3447 state = ctx->state;
3448 }
659bfcd6 3449 }
08e9eac4 3450
14c43f76
DQ		 3451 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3452 if (IS_ERR(label))
3453 return PTR_ERR(label);
3454
3455 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3456 if (status == 0) {
f044636d 3457 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3458 nfs_setsecurity(inode, fattr, label);
3459 }
14c43f76 3460 nfs4_label_free(label);
1da177e4
LT		 3461 return status;
3462}
3463
0c2e53f1
TM		 3464static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3465 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3466 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3467{
0c2e53f1 3468 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3469 int status;
3470 struct nfs4_lookup_arg args = {
3471 .bitmask = server->attr_bitmask,
0c2e53f1 3472 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3473 .name = name,
3474 };
3475 struct nfs4_lookup_res res = {
3476 .server = server,
3477 .fattr = fattr,
aa9c2669 3478 .label = label,
2b3de441
DH		 3479 .fh = fhandle,
3480 };
3481 struct rpc_message msg = {
3482 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3483 .rpc_argp = &args,
3484 .rpc_resp = &res,
3485 };
3486
aa9c2669
DQ		 3487 args.bitmask = nfs4_bitmask(server, label);
3488
2b3de441
DH		 3489 nfs_fattr_init(fattr);
3490
1da177e4 3491 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3492 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3493 dprintk("NFS reply lookup: %d\n", status);
3494 return status;
3495}
3496
72de53ec 3497static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3498{
7ebb9315 3499 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3500 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3501 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3502 fattr->nlink = 2;
3503}
3504
72de53ec
BS		 3505static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3506 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3507 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3508{
3509 struct nfs4_exception exception = { };
72de53ec 3510 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3511 int err;
3512 do {
1775fd3e 3513 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3514 trace_nfs4_lookup(dir, name, err);
72de53ec 3515 switch (err) {
08ef7bd3 3516 case -NFS4ERR_BADNAME:
72de53ec
BS		 3517 err = -ENOENT;
3518 goto out;
0c2e53f1 3519 case -NFS4ERR_MOVED:
f05d147f 3520 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3521 if (err == -NFS4ERR_MOVED)
3522 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3523 goto out;
0c2e53f1 3524 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3525 err = -EPERM;
3526 if (client != *clnt)
3527 goto out;
66b06860 3528 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3529 if (IS_ERR(client))
3530 return PTR_ERR(client);
3531
3532 exception.retry = 1;
3533 break;
3534 default:
3535 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3536 }
1da177e4 3537 } while (exception.retry);
72de53ec
BS		 3538
3539out:
3540 if (err == 0)
3541 *clnt = client;
3542 else if (client != *clnt)
3543 rpc_shutdown_client(client);
3544
1da177e4
LT		 3545 return err;
3546}
3547
80a16b21 3548static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3549 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3550 struct nfs4_label *label)
72de53ec
BS		 3551{
3552 int status;
3553 struct rpc_clnt *client = NFS_CLIENT(dir);
3554
1775fd3e 3555 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3556 if (client != NFS_CLIENT(dir)) {
3557 rpc_shutdown_client(client);
3558 nfs_fixup_secinfo_attributes(fattr);
3559 }
3560 return status;
3561}
3562
f05d147f
BS		 3563struct rpc_clnt *
3564nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3565 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3566{
b72888cb 3567 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3568 int status;
f05d147f 3569
1775fd3e 3570 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3571 if (status < 0)
f05d147f 3572 return ERR_PTR(status);
b72888cb 3573 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3574}
3575
1da177e4
LT		 3576static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3577{
76b32999 3578 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3579 struct nfs4_accessargs args = {
3580 .fh = NFS_FH(inode),
a4980e78 3581 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3582 };
3583 struct nfs4_accessres res = {
3584 .server = server,
1da177e4 3585 };
1da177e4
LT		 3586 struct rpc_message msg = {
3587 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3588 .rpc_argp = &args,
3589 .rpc_resp = &res,
3590 .rpc_cred = entry->cred,
3591 };
3592 int mode = entry->mask;
aa9c2669 3593 int status = 0;
1da177e4
LT		 3594
3595 /*
3596 * Determine which access bits we want to ask for...
3597 */
3598 if (mode & MAY_READ)
3599 args.access |= NFS4_ACCESS_READ;
3600 if (S_ISDIR(inode->i_mode)) {
3601 if (mode & MAY_WRITE)
3602 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3603 if (mode & MAY_EXEC)
3604 args.access |= NFS4_ACCESS_LOOKUP;
3605 } else {
3606 if (mode & MAY_WRITE)
3607 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3608 if (mode & MAY_EXEC)
3609 args.access |= NFS4_ACCESS_EXECUTE;
3610 }
c407d41a
TM		 3611
3612 res.fattr = nfs_alloc_fattr();
3613 if (res.fattr == NULL)
3614 return -ENOMEM;
3615
7c513058 3616 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3617 if (!status) {
6168f62c 3618 nfs_access_set_mask(entry, res.access);
c407d41a 3619 nfs_refresh_inode(inode, res.fattr);
1da177e4 3620 }
c407d41a 3621 nfs_free_fattr(res.fattr);
1da177e4
LT		 3622 return status;
3623}
3624
3625static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3626{
3627 struct nfs4_exception exception = { };
3628 int err;
3629 do {
c1578b76
TM		 3630 err = _nfs4_proc_access(inode, entry);
3631 trace_nfs4_access(inode, err);
3632 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3633 &exception);
3634 } while (exception.retry);
3635 return err;
3636}
3637
3638/*
3639 * TODO: For the time being, we don't try to get any attributes
3640 * along with any of the zero-copy operations READ, READDIR,
3641 * READLINK, WRITE.
3642 *
3643 * In the case of the first three, we want to put the GETATTR
3644 * after the read-type operation -- this is because it is hard
3645 * to predict the length of a GETATTR response in v4, and thus
3646 * align the READ data correctly. This means that the GETATTR
3647 * may end up partially falling into the page cache, and we should
3648 * shift it into the 'tail' of the xdr_buf before processing.
3649 * To do this efficiently, we need to know the total length
3650 * of data received, which doesn't seem to be available outside
3651 * of the RPC layer.
3652 *
3653 * In the case of WRITE, we also want to put the GETATTR after
3654 * the operation -- in this case because we want to make sure
140150db 3655 * we get the post-operation mtime and size.
1da177e4
LT		 3656 *
3657 * Both of these changes to the XDR layer would in fact be quite
3658 * minor, but I decided to leave them for a subsequent patch.
3659 */
3660static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3661 unsigned int pgbase, unsigned int pglen)
3662{
3663 struct nfs4_readlink args = {
3664 .fh = NFS_FH(inode),
3665 .pgbase = pgbase,
3666 .pglen = pglen,
3667 .pages = &page,
3668 };
f50c7000 3669 struct nfs4_readlink_res res;
1da177e4
LT		 3670 struct rpc_message msg = {
3671 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3672 .rpc_argp = &args,
f50c7000 3673 .rpc_resp = &res,
1da177e4
LT		 3674 };
3675
7c513058 3676 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3677}
3678
3679static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3680 unsigned int pgbase, unsigned int pglen)
3681{
3682 struct nfs4_exception exception = { };
3683 int err;
3684 do {
c1578b76
TM		 3685 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3686 trace_nfs4_readlink(inode, err);
3687 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3688 &exception);
3689 } while (exception.retry);
3690 return err;
3691}
3692
1da177e4 3693/*
8867fe58 3694 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3695 */
1da177e4
LT		 3696static int
3697nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3698 int flags)
1da177e4 3699{
aa9c2669 3700 struct nfs4_label l, *ilabel = NULL;
8867fe58 3701 struct nfs_open_context *ctx;
1da177e4 3702 struct nfs4_state *state;
1da177e4
LT		 3703 int status = 0;
3704
8867fe58
MS		 3705 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3706 if (IS_ERR(ctx))
3707 return PTR_ERR(ctx);
3708
aa9c2669
DQ		 3709 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3710
a8a5da99 3711 sattr->ia_mode &= ~current_umask();
c5c3fb5f 3712 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 3713 if (IS_ERR(state)) {
3714 status = PTR_ERR(state);
c0204fd2 3715 goto out;
1da177e4 3716 }
1da177e4 3717out:
aa9c2669 3718 nfs4_label_release_security(ilabel);
8867fe58 3719 put_nfs_open_context(ctx);
1da177e4
LT		 3720 return status;
3721}
3722
3723static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3724{
16e42959 3725 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3726 struct nfs_removeargs args = {
1da177e4 3727 .fh = NFS_FH(dir),
26fe5750 3728 .name = *name,
16e42959 3729 };
4fdc17b2 3730 struct nfs_removeres res = {
16e42959 3731 .server = server,
1da177e4 3732 };
1da177e4 3733 struct rpc_message msg = {
4fdc17b2
TM		 3734 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3735 .rpc_argp = &args,
3736 .rpc_resp = &res,
1da177e4 3737 };
778d2817 3738 int status;
1da177e4 3739
7c513058 3740 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3741 if (status == 0)
16e42959 3742 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3743 return status;
3744}
3745
3746static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3747{
3748 struct nfs4_exception exception = { };
3749 int err;
3750 do {
078ea3df
TM		 3751 err = _nfs4_proc_remove(dir, name);
3752 trace_nfs4_remove(dir, name, err);
3753 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3754 &exception);
3755 } while (exception.retry);
3756 return err;
3757}
3758
e4eff1a6 3759static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3760{
e4eff1a6
TM		 3761 struct nfs_server *server = NFS_SERVER(dir);
3762 struct nfs_removeargs *args = msg->rpc_argp;
3763 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3764
e4eff1a6 3765 res->server = server;
1da177e4 3766 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3767 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3768
3769 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3770}
3771
34e137cc
BS		 3772static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3773{
d9afbd1b
TM		 3774 nfs4_setup_sequence(NFS_SERVER(data->dir),
3775 &data->args.seq_args,
3776 &data->res.seq_res,
3777 task);
1da177e4
LT		 3778}
3779
e4eff1a6 3780static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3781{
078ea3df
TM		 3782 struct nfs_unlinkdata *data = task->tk_calldata;
3783 struct nfs_removeres *res = &data->res;
e4eff1a6 3784
14516c3a
TM		 3785 if (!nfs4_sequence_done(task, &res->seq_res))
3786 return 0;
8478eaa1
N		 3787 if (nfs4_async_handle_error(task, res->server, NULL,
3788 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3789 return 0;
3790 update_changeattr(dir, &res->cinfo);
e4eff1a6 3791 return 1;
1da177e4
LT		 3792}
3793
d3d4152a
JL		 3794static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3795{
3796 struct nfs_server *server = NFS_SERVER(dir);
3797 struct nfs_renameargs *arg = msg->rpc_argp;
3798 struct nfs_renameres *res = msg->rpc_resp;
3799
3800 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3801 res->server = server;
a9c92d6b 3802 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3803}
3804
c6bfa1a1
BS		 3805static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3806{
d9afbd1b
TM		 3807 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3808 &data->args.seq_args,
3809 &data->res.seq_res,
3810 task);
d3d4152a
JL		 3811}
3812
3813static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3814 struct inode *new_dir)
3815{
fbc6f7c2
TM		 3816 struct nfs_renamedata *data = task->tk_calldata;
3817 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3818
3819 if (!nfs4_sequence_done(task, &res->seq_res))
3820 return 0;
8478eaa1 3821 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3822 return 0;
3823
3824 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3825 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3826 return 1;
3827}
3828
1da177e4
LT		 3829static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3830{
91ba2eee 3831 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3832 struct nfs4_link_arg arg = {
3833 .fh = NFS_FH(inode),
3834 .dir_fh = NFS_FH(dir),
3835 .name = name,
91ba2eee
TM		 3836 .bitmask = server->attr_bitmask,
3837 };
91ba2eee
TM		 3838 struct nfs4_link_res res = {
3839 .server = server,
1775fd3e 3840 .label = NULL,
1da177e4 3841 };
1da177e4
LT		 3842 struct rpc_message msg = {
3843 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3844 .rpc_argp = &arg,
91ba2eee 3845 .rpc_resp = &res,
1da177e4 3846 };
136f2627
TM		 3847 int status = -ENOMEM;
3848
3849 res.fattr = nfs_alloc_fattr();
778d2817 3850 if (res.fattr == NULL)
136f2627 3851 goto out;
1da177e4 3852
14c43f76
DQ		 3853 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3854 if (IS_ERR(res.label)) {
3855 status = PTR_ERR(res.label);
3856 goto out;
3857 }
aa9c2669 3858 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3859
7c513058 3860 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3861 if (!status) {
3862 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3863 status = nfs_post_op_update_inode(inode, res.fattr);
3864 if (!status)
3865 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3866 }
14c43f76
DQ		 3867
3868
3869 nfs4_label_free(res.label);
3870
136f2627 3871out:
136f2627 3872 nfs_free_fattr(res.fattr);
1da177e4
LT		 3873 return status;
3874}
3875
3876static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3877{
3878 struct nfs4_exception exception = { };
3879 int err;
3880 do {
3881 err = nfs4_handle_exception(NFS_SERVER(inode),
3882 _nfs4_proc_link(inode, dir, name),
3883 &exception);
3884 } while (exception.retry);
3885 return err;
3886}
3887
57dc9a57
TM		 3888struct nfs4_createdata {
3889 struct rpc_message msg;
3890 struct nfs4_create_arg arg;
3891 struct nfs4_create_res res;
3892 struct nfs_fh fh;
3893 struct nfs_fattr fattr;
1775fd3e 3894 struct nfs4_label *label;
57dc9a57
TM		 3895};
3896
3897static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3898 struct qstr *name, struct iattr *sattr, u32 ftype)
3899{
3900 struct nfs4_createdata *data;
3901
3902 data = kzalloc(sizeof(*data), GFP_KERNEL);
3903 if (data != NULL) {
3904 struct nfs_server *server = NFS_SERVER(dir);
3905
14c43f76
DQ		 3906 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3907 if (IS_ERR(data->label))
3908 goto out_free;
3909
57dc9a57
TM		 3910 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3911 data->msg.rpc_argp = &data->arg;
3912 data->msg.rpc_resp = &data->res;
3913 data->arg.dir_fh = NFS_FH(dir);
3914 data->arg.server = server;
3915 data->arg.name = name;
3916 data->arg.attrs = sattr;
3917 data->arg.ftype = ftype;
aa9c2669 3918 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3919 data->res.server = server;
3920 data->res.fh = &data->fh;
3921 data->res.fattr = &data->fattr;
1775fd3e 3922 data->res.label = data->label;
57dc9a57 3923 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3924 }
3925 return data;
14c43f76
DQ		 3926out_free:
3927 kfree(data);
3928 return NULL;
57dc9a57
TM		 3929}
3930
3931static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3932{
7c513058 3933 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3934 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3935 if (status == 0) {
3936 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3937 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3938 }
3939 return status;
3940}
3941
3942static void nfs4_free_createdata(struct nfs4_createdata *data)
3943{
14c43f76 3944 nfs4_label_free(data->label);
57dc9a57
TM		 3945 kfree(data);
3946}
3947
4f390c15 3948static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3949 struct page *page, unsigned int len, struct iattr *sattr,
3950 struct nfs4_label *label)
1da177e4 3951{
57dc9a57
TM		 3952 struct nfs4_createdata *data;
3953 int status = -ENAMETOOLONG;
1da177e4 3954
94a6d753 3955 if (len > NFS4_MAXPATHLEN)
57dc9a57 3956 goto out;
4f390c15 3957
57dc9a57
TM		 3958 status = -ENOMEM;
3959 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3960 if (data == NULL)
3961 goto out;
3962
3963 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3964 data->arg.u.symlink.pages = &page;
3965 data->arg.u.symlink.len = len;
1775fd3e 3966 data->arg.label = label;
1da177e4 3967
57dc9a57
TM		 3968 status = nfs4_do_create(dir, dentry, data);
3969
3970 nfs4_free_createdata(data);
3971out:
1da177e4
LT		 3972 return status;
3973}
3974
4f390c15 3975static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3976 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3977{
3978 struct nfs4_exception exception = { };
aa9c2669 3979 struct nfs4_label l, *label = NULL;
1da177e4 3980 int err;
aa9c2669
DQ		 3981
3982 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3983
1da177e4 3984 do {
078ea3df
TM		 3985 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3986 trace_nfs4_symlink(dir, &dentry->d_name, err);
3987 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3988 &exception);
3989 } while (exception.retry);
aa9c2669
DQ		 3990
3991 nfs4_label_release_security(label);
1da177e4
LT		 3992 return err;
3993}
3994
3995static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3996 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3997{
57dc9a57
TM		 3998 struct nfs4_createdata *data;
3999 int status = -ENOMEM;
1da177e4 4000
57dc9a57
TM		 4001 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
4002 if (data == NULL)
4003 goto out;
4004
1775fd3e 4005 data->arg.label = label;
57dc9a57
TM		 4006 status = nfs4_do_create(dir, dentry, data);
4007
4008 nfs4_free_createdata(data);
4009out:
1da177e4
LT		 4010 return status;
4011}
4012
4013static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
4014 struct iattr *sattr)
4015{
4016 struct nfs4_exception exception = { };
aa9c2669 4017 struct nfs4_label l, *label = NULL;
1da177e4 4018 int err;
a8a5da99 4019
aa9c2669
DQ		 4020 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4021
a8a5da99 4022 sattr->ia_mode &= ~current_umask();
1da177e4 4023 do {
078ea3df
TM		 4024 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
4025 trace_nfs4_mkdir(dir, &dentry->d_name, err);
4026 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4027 &exception);
4028 } while (exception.retry);
aa9c2669
DQ		 4029 nfs4_label_release_security(label);
4030
1da177e4
LT		 4031 return err;
4032}
4033
4034static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4035 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4 4036{
2b0143b5 4037 struct inode *dir = d_inode(dentry);
1da177e4
LT		 4038 struct nfs4_readdir_arg args = {
4039 .fh = NFS_FH(dir),
56e4ebf8 4040 .pages = pages,
1da177e4
LT		 4041 .pgbase = 0,
4042 .count = count,
2b0143b5 4043 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 4044 .plus = plus,
1da177e4
LT		 4045 };
4046 struct nfs4_readdir_res res;
4047 struct rpc_message msg = {
4048 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
4049 .rpc_argp = &args,
4050 .rpc_resp = &res,
4051 .rpc_cred = cred,
4052 };
4053 int status;
4054
6de1472f
AV		 4055 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
4056 dentry,
eadf4598 4057 (unsigned long long)cookie);
c3f52af3 4058 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 4059 res.pgbase = args.pgbase;
7c513058 4060 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 4061 if (status >= 0) {
c3f52af3 4062 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 4063 status += args.pgbase;
4064 }
c4812998
TM		 4065
4066 nfs_invalidate_atime(dir);
4067
3110ff80 4068 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 4069 return status;
4070}
4071
4072static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 4073 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 4074{
4075 struct nfs4_exception exception = { };
4076 int err;
4077 do {
c1578b76
TM		 4078 err = _nfs4_proc_readdir(dentry, cred, cookie,
4079 pages, count, plus);
2b0143b5
DH		 4080 trace_nfs4_readdir(d_inode(dentry), err);
4081 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 4082 &exception);
4083 } while (exception.retry);
4084 return err;
4085}
4086
4087static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 4088 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 4089{
57dc9a57
TM		 4090 struct nfs4_createdata *data;
4091 int mode = sattr->ia_mode;
4092 int status = -ENOMEM;
1da177e4 4093
57dc9a57
TM		 4094 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
4095 if (data == NULL)
4096 goto out;
4097
1da177e4 4098 if (S_ISFIFO(mode))
57dc9a57 4099 data->arg.ftype = NF4FIFO;
1da177e4 4100 else if (S_ISBLK(mode)) {
57dc9a57
TM		 4101 data->arg.ftype = NF4BLK;
4102 data->arg.u.device.specdata1 = MAJOR(rdev);
4103 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 4104 }
4105 else if (S_ISCHR(mode)) {
57dc9a57
TM		 4106 data->arg.ftype = NF4CHR;
4107 data->arg.u.device.specdata1 = MAJOR(rdev);
4108 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 4109 } else if (!S_ISSOCK(mode)) {
4110 status = -EINVAL;
4111 goto out_free;
1da177e4 4112 }
1775fd3e 4113
aa9c2669 4114 data->arg.label = label;
57dc9a57 4115 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 4116out_free:
57dc9a57
TM		 4117 nfs4_free_createdata(data);
4118out:
1da177e4
LT		 4119 return status;
4120}
4121
4122static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
4123 struct iattr *sattr, dev_t rdev)
4124{
4125 struct nfs4_exception exception = { };
aa9c2669 4126 struct nfs4_label l, *label = NULL;
1da177e4 4127 int err;
a8a5da99 4128
aa9c2669
DQ		 4129 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4130
a8a5da99 4131 sattr->ia_mode &= ~current_umask();
1da177e4 4132 do {
078ea3df
TM		 4133 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4134 trace_nfs4_mknod(dir, &dentry->d_name, err);
4135 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4136 &exception);
4137 } while (exception.retry);
aa9c2669
DQ		 4138
4139 nfs4_label_release_security(label);
4140
1da177e4
LT		 4141 return err;
4142}
4143
4144static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4145 struct nfs_fsstat *fsstat)
4146{
4147 struct nfs4_statfs_arg args = {
4148 .fh = fhandle,
4149 .bitmask = server->attr_bitmask,
4150 };
24ad148a
BH		 4151 struct nfs4_statfs_res res = {
4152 .fsstat = fsstat,
4153 };
1da177e4
LT		 4154 struct rpc_message msg = {
4155 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4156 .rpc_argp = &args,
24ad148a 4157 .rpc_resp = &res,
1da177e4
LT		 4158 };
4159
0e574af1 4160 nfs_fattr_init(fsstat->fattr);
7c513058 4161 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4162}
4163
4164static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4165{
4166 struct nfs4_exception exception = { };
4167 int err;
4168 do {
4169 err = nfs4_handle_exception(server,
4170 _nfs4_proc_statfs(server, fhandle, fsstat),
4171 &exception);
4172 } while (exception.retry);
4173 return err;
4174}
4175
4176static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4177 struct nfs_fsinfo *fsinfo)
4178{
4179 struct nfs4_fsinfo_arg args = {
4180 .fh = fhandle,
4181 .bitmask = server->attr_bitmask,
4182 };
3dda5e43
BH		 4183 struct nfs4_fsinfo_res res = {
4184 .fsinfo = fsinfo,
4185 };
1da177e4
LT		 4186 struct rpc_message msg = {
4187 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4188 .rpc_argp = &args,
3dda5e43 4189 .rpc_resp = &res,
1da177e4
LT		 4190 };
4191
7c513058 4192 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4193}
4194
4195static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4196{
4197 struct nfs4_exception exception = { };
83ca7f5a 4198 unsigned long now = jiffies;
1da177e4
LT		 4199 int err;
4200
4201 do {
83ca7f5a 4202 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4203 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 4204 if (err == 0) {
4205 struct nfs_client *clp = server->nfs_client;
4206
4207 spin_lock(&clp->cl_lock);
4208 clp->cl_lease_time = fsinfo->lease_time * HZ;
4209 clp->cl_last_renewal = now;
4210 spin_unlock(&clp->cl_lock);
4211 break;
4212 }
4213 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4214 } while (exception.retry);
4215 return err;
4216}
4217
4218static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4219{
e38eb650
BS		 4220 int error;
4221
0e574af1 4222 nfs_fattr_init(fsinfo->fattr);
e38eb650 4223 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4224 if (error == 0) {
4225 /* block layout checks this! */
4226 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4227 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4228 }
e38eb650
BS		 4229
4230 return error;
1da177e4
LT		 4231}
4232
4233static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4234 struct nfs_pathconf *pathconf)
4235{
4236 struct nfs4_pathconf_arg args = {
4237 .fh = fhandle,
4238 .bitmask = server->attr_bitmask,
4239 };
d45b2989
BH		 4240 struct nfs4_pathconf_res res = {
4241 .pathconf = pathconf,
4242 };
1da177e4
LT		 4243 struct rpc_message msg = {
4244 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4245 .rpc_argp = &args,
d45b2989 4246 .rpc_resp = &res,
1da177e4
LT		 4247 };
4248
4249 /* None of the pathconf attributes are mandatory to implement */
4250 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4251 memset(pathconf, 0, sizeof(*pathconf));
4252 return 0;
4253 }
4254
0e574af1 4255 nfs_fattr_init(pathconf->fattr);
7c513058 4256 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4257}
4258
4259static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4260 struct nfs_pathconf *pathconf)
4261{
4262 struct nfs4_exception exception = { };
4263 int err;
4264
4265 do {
4266 err = nfs4_handle_exception(server,
4267 _nfs4_proc_pathconf(server, fhandle, pathconf),
4268 &exception);
4269 } while (exception.retry);
4270 return err;
4271}
4272
5521abfd 4273int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4274 const struct nfs_open_context *ctx,
4275 const struct nfs_lock_context *l_ctx,
4276 fmode_t fmode)
4277{
4278 const struct nfs_lockowner *lockowner = NULL;
4279
4280 if (l_ctx != NULL)
4281 lockowner = &l_ctx->lockowner;
5521abfd 4282 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4283}
4284EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4285
5521abfd
TM		 4286static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4287 const struct nfs_open_context *ctx,
4288 const struct nfs_lock_context *l_ctx,
4289 fmode_t fmode)
4290{
4291 nfs4_stateid current_stateid;
4292
e1253be0
TM		 4293 /* If the current stateid represents a lost lock, then exit */
4294 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4295 return true;
5521abfd
TM		 4296 return nfs4_stateid_match(stateid, &current_stateid);
4297}
4298
4299static bool nfs4_error_stateid_expired(int err)
4300{
4301 switch (err) {
4302 case -NFS4ERR_DELEG_REVOKED:
4303 case -NFS4ERR_ADMIN_REVOKED:
4304 case -NFS4ERR_BAD_STATEID:
4305 case -NFS4ERR_STALE_STATEID:
4306 case -NFS4ERR_OLD_STATEID:
4307 case -NFS4ERR_OPENMODE:
4308 case -NFS4ERR_EXPIRED:
4309 return true;
4310 }
4311 return false;
4312}
4313
d45f60c6 4314void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4315{
d45f60c6 4316 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4317}
4318
d45f60c6 4319static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4320{
d45f60c6 4321 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4322
d45f60c6
WAA		 4323 trace_nfs4_read(hdr, task->tk_status);
4324 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4325 hdr->args.context->state,
4326 NULL) == -EAGAIN) {
d00c5d43 4327 rpc_restart_call_prepare(task);
ec06c096 4328 return -EAGAIN;
1da177e4 4329 }
8850df99 4330
d45f60c6 4331 __nfs4_read_done_cb(hdr);
1da177e4 4332 if (task->tk_status > 0)
d45f60c6 4333 renew_lease(server, hdr->timestamp);
ec06c096 4334 return 0;
1da177e4
LT		 4335}
4336
5521abfd 4337static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4338 struct nfs_pgio_args *args)
5521abfd
TM		 4339{
4340
4341 if (!nfs4_error_stateid_expired(task->tk_status) ||
4342 nfs4_stateid_is_current(&args->stateid,
4343 args->context,
4344 args->lock_context,
4345 FMODE_READ))
4346 return false;
4347 rpc_restart_call_prepare(task);
4348 return true;
4349}
4350
d45f60c6 4351static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4352{
4353
4354 dprintk("--> %s\n", __func__);
4355
d45f60c6 4356 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4357 return -EAGAIN;
d45f60c6 4358 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4359 return -EAGAIN;
d45f60c6
WAA		 4360 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4361 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4362}
4363
d45f60c6
WAA		 4364static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4365 struct rpc_message *msg)
1da177e4 4366{
d45f60c6
WAA		 4367 hdr->timestamp = jiffies;
4368 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4369 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4370 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4371}
4372
d45f60c6
WAA		 4373static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4374 struct nfs_pgio_header *hdr)
ea7c3303 4375{
d45f60c6
WAA		 4376 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4377 &hdr->args.seq_args,
4378 &hdr->res.seq_res,
9b206149 4379 task))
ef1820f9 4380 return 0;
d45f60c6
WAA		 4381 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4382 hdr->args.lock_context,
4383 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4384 return -EIO;
d45f60c6 4385 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4386 return -EIO;
4387 return 0;
1da177e4
LT		 4388}
4389
d45f60c6
WAA		 4390static int nfs4_write_done_cb(struct rpc_task *task,
4391 struct nfs_pgio_header *hdr)
1da177e4 4392{
d45f60c6 4393 struct inode *inode = hdr->inode;
8478eaa1 4394
d45f60c6
WAA		 4395 trace_nfs4_write(hdr, task->tk_status);
4396 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4397 hdr->args.context->state,
4398 NULL) == -EAGAIN) {
d00c5d43 4399 rpc_restart_call_prepare(task);
788e7a89 4400 return -EAGAIN;
1da177e4 4401 }
4f9838c7 4402 if (task->tk_status >= 0) {
d45f60c6 4403 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4404 nfs_writeback_update_inode(hdr);
4f9838c7 4405 }
788e7a89 4406 return 0;
1da177e4
LT		 4407}
4408
5521abfd 4409static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4410 struct nfs_pgio_args *args)
5521abfd
TM		 4411{
4412
4413 if (!nfs4_error_stateid_expired(task->tk_status) ||
4414 nfs4_stateid_is_current(&args->stateid,
4415 args->context,
4416 args->lock_context,
4417 FMODE_WRITE))
4418 return false;
4419 rpc_restart_call_prepare(task);
4420 return true;
4421}
4422
d45f60c6 4423static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4424{
d45f60c6 4425 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4426 return -EAGAIN;
d45f60c6 4427 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4428 return -EAGAIN;
d45f60c6
WAA		 4429 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4430 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4431}
4432
5a37f851 4433static
d45f60c6 4434bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4435{
5a37f851 4436 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4437 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4438 return false;
4439 /* Otherwise, request attributes if and only if we don't hold
4440 * a delegation
4441 */
011e2a7f 4442 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4443}
a69aef14 4444
d45f60c6
WAA		 4445static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4446 struct rpc_message *msg)
1da177e4 4447{
d45f60c6 4448 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4449
d45f60c6
WAA		 4450 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4451 hdr->args.bitmask = NULL;
4452 hdr->res.fattr = NULL;
7ffd1064 4453 } else
d45f60c6 4454 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4455
d45f60c6
WAA		 4456 if (!hdr->pgio_done_cb)
4457 hdr->pgio_done_cb = nfs4_write_done_cb;
4458 hdr->res.server = server;
4459 hdr->timestamp = jiffies;
1da177e4 4460
bdc7f021 4461 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4462 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4463}
4464
0b7c0153 4465static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4466{
d9afbd1b
TM		 4467 nfs4_setup_sequence(NFS_SERVER(data->inode),
4468 &data->args.seq_args,
4469 &data->res.seq_res,
4470 task);
1da177e4
LT		 4471}
4472
0b7c0153 4473static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4474{
1da177e4 4475 struct inode *inode = data->inode;
14516c3a 4476
cc668ab3 4477 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4478 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4479 NULL, NULL) == -EAGAIN) {
d00c5d43 4480 rpc_restart_call_prepare(task);
788e7a89 4481 return -EAGAIN;
1da177e4 4482 }
788e7a89 4483 return 0;
1da177e4
LT		 4484}
4485
0b7c0153 4486static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4487{
4488 if (!nfs4_sequence_done(task, &data->res.seq_res))
4489 return -EAGAIN;
0b7c0153 4490 return data->commit_done_cb(task, data);
5f452431
FI		 4491}
4492
0b7c0153 4493static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4494{
788e7a89 4495 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4496
0b7c0153
FI		 4497 if (data->commit_done_cb == NULL)
4498 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4499 data->res.server = server;
bdc7f021 4500 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4501 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4502}
4503
9bc4e3ca
CL		 4504struct nfs4_renewdata {
4505 struct nfs_client *client;
4506 unsigned long timestamp;
4507};
4508
1da177e4
LT		 4509/*
4510 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4511 * standalone procedure for queueing an asynchronous RENEW.
4512 */
9bc4e3ca 4513static void nfs4_renew_release(void *calldata)
dc96aef9 4514{
9bc4e3ca
CL		 4515 struct nfs4_renewdata *data = calldata;
4516 struct nfs_client *clp = data->client;
dc96aef9 4517
0851de06
AB		 4518 if (atomic_read(&clp->cl_count) > 1)
4519 nfs4_schedule_state_renewal(clp);
4520 nfs_put_client(clp);
9bc4e3ca 4521 kfree(data);
dc96aef9
AB		 4522}
4523
9bc4e3ca 4524static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4525{
9bc4e3ca
CL		 4526 struct nfs4_renewdata *data = calldata;
4527 struct nfs_client *clp = data->client;
4528 unsigned long timestamp = data->timestamp;
1da177e4 4529
c6d01c6f 4530 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4531 switch (task->tk_status) {
4532 case 0:
4533 break;
4534 case -NFS4ERR_LEASE_MOVED:
4535 nfs4_schedule_lease_moved_recovery(clp);
4536 break;
4537 default:
95baa25c 4538 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4539 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4540 return;
4541 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4542 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4543 return;
4544 }
4545 nfs4_schedule_path_down_recovery(clp);
1da177e4 4546 }
452e9352 4547 do_renew_lease(clp, timestamp);
1da177e4
LT		 4548}
4549
963d8fe5
TM		 4550static const struct rpc_call_ops nfs4_renew_ops = {
4551 .rpc_call_done = nfs4_renew_done,
dc96aef9 4552 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4553};
4554
2f60ea6b 4555static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4556{
4557 struct rpc_message msg = {
4558 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4559 .rpc_argp = clp,
b4454fe1 4560 .rpc_cred = cred,
1da177e4 4561 };
9bc4e3ca 4562 struct nfs4_renewdata *data;
1da177e4 4563
2f60ea6b
TM		 4564 if (renew_flags == 0)
4565 return 0;
0851de06
AB		 4566 if (!atomic_inc_not_zero(&clp->cl_count))
4567 return -EIO;
b569ad34 4568 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4569 if (data == NULL)
4570 return -ENOMEM;
4571 data->client = clp;
4572 data->timestamp = jiffies;
bc7a05ca 4573 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4574 &nfs4_renew_ops, data);
1da177e4
LT		 4575}
4576
8534d4ec 4577static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4578{
4579 struct rpc_message msg = {
4580 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4581 .rpc_argp = clp,
b4454fe1 4582 .rpc_cred = cred,
1da177e4
LT		 4583 };
4584 unsigned long now = jiffies;
4585 int status;
4586
bc7a05ca 4587 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4588 if (status < 0)
4589 return status;
452e9352 4590 do_renew_lease(clp, now);
1da177e4
LT		 4591 return 0;
4592}
4593
aa1870af
BF		 4594static inline int nfs4_server_supports_acls(struct nfs_server *server)
4595{
7dd7d959 4596 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4597}
4598
21f498c2
TM		 4599/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4600 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4601 * the stack.
4602 */
21f498c2 4603#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4604
e9e3d724 4605static int buf_to_pages_noslab(const void *buf, size_t buflen,
8fbcf237 4606 struct page **pages)
e9e3d724
NH		 4607{
4608 struct page *newpage, **spages;
4609 int rc = 0;
4610 size_t len;
4611 spages = pages;
4612
4613 do {
21f498c2 4614 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4615 newpage = alloc_page(GFP_KERNEL);
4616
4617 if (newpage == NULL)
4618 goto unwind;
4619 memcpy(page_address(newpage), buf, len);
4620 buf += len;
4621 buflen -= len;
4622 *pages++ = newpage;
4623 rc++;
4624 } while (buflen != 0);
4625
4626 return rc;
4627
4628unwind:
4629 for(; rc > 0; rc--)
4630 __free_page(spages[rc-1]);
4631 return -ENOMEM;
4632}
4633
e50a1c2e
BF		 4634struct nfs4_cached_acl {
4635 int cached;
4636 size_t len;
3e9d4154 4637 char data[0];
e50a1c2e
BF		 4638};
4639
4640static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4641{
4642 struct nfs_inode *nfsi = NFS_I(inode);
4643
4644 spin_lock(&inode->i_lock);
4645 kfree(nfsi->nfs4_acl);
4646 nfsi->nfs4_acl = acl;
4647 spin_unlock(&inode->i_lock);
4648}
4649
4650static void nfs4_zap_acl_attr(struct inode *inode)
4651{
4652 nfs4_set_cached_acl(inode, NULL);
4653}
4654
4655static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4656{
4657 struct nfs_inode *nfsi = NFS_I(inode);
4658 struct nfs4_cached_acl *acl;
4659 int ret = -ENOENT;
4660
4661 spin_lock(&inode->i_lock);
4662 acl = nfsi->nfs4_acl;
4663 if (acl == NULL)
4664 goto out;
4665 if (buf == NULL) /* user is just asking for length */
4666 goto out_len;
4667 if (acl->cached == 0)
4668 goto out;
4669 ret = -ERANGE; /* see getxattr(2) man page */
4670 if (acl->len > buflen)
4671 goto out;
4672 memcpy(buf, acl->data, acl->len);
4673out_len:
4674 ret = acl->len;
4675out:
4676 spin_unlock(&inode->i_lock);
4677 return ret;
4678}
4679
5794d21e 4680static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4681{
4682 struct nfs4_cached_acl *acl;
b291f1b1 4683 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4684
1f1ea6c2 4685 if (buflen <= PAGE_SIZE) {
b291f1b1 4686 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4687 if (acl == NULL)
4688 goto out;
4689 acl->cached = 1;
5794d21e 4690 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4691 } else {
4692 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4693 if (acl == NULL)
4694 goto out;
4695 acl->cached = 0;
4696 }
4697 acl->len = acl_len;
4698out:
4699 nfs4_set_cached_acl(inode, acl);
4700}
4701
bf118a34
AA		 4702/*
4703 * The getxattr API returns the required buffer length when called with a
4704 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4705 * the required buf. On a NULL buf, we send a page of data to the server
4706 * guessing that the ACL request can be serviced by a page. If so, we cache
4707 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4708 * the cache. If not so, we throw away the page, and cache the required
4709 * length. The next getxattr call will then produce another round trip to
4710 * the server, this time with the input buf of the required size.
4711 */
16b4289c 4712static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4713{
bf118a34 4714 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4715 struct nfs_getaclargs args = {
4716 .fh = NFS_FH(inode),
4717 .acl_pages = pages,
4718 .acl_len = buflen,
4719 };
663c79b3
BH		 4720 struct nfs_getaclres res = {
4721 .acl_len = buflen,
4722 };
aa1870af
BF		 4723 struct rpc_message msg = {
4724 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4725 .rpc_argp = &args,
663c79b3 4726 .rpc_resp = &res,
aa1870af 4727 };
21f498c2
TM		 4728 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4729 int ret = -ENOMEM, i;
aa1870af 4730
bf118a34
AA		 4731 /* As long as we're doing a round trip to the server anyway,
4732 * let's be prepared for a page of acl data. */
4733 if (npages == 0)
4734 npages = 1;
21f498c2
TM		 4735 if (npages > ARRAY_SIZE(pages))
4736 return -ERANGE;
5a006899 4737
bf118a34
AA		 4738 for (i = 0; i < npages; i++) {
4739 pages[i] = alloc_page(GFP_KERNEL);
4740 if (!pages[i])
4741 goto out_free;
e50a1c2e 4742 }
5a006899
SP		 4743
4744 /* for decoding across pages */
4745 res.acl_scratch = alloc_page(GFP_KERNEL);
4746 if (!res.acl_scratch)
4747 goto out_free;
4748
bf118a34 4749 args.acl_len = npages * PAGE_SIZE;
5a006899 4750
de040bec 4751 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4752 __func__, buf, buflen, npages, args.acl_len);
4753 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4754 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4755 if (ret)
4756 goto out_free;
bf118a34 4757
1f1ea6c2
TM		 4758 /* Handle the case where the passed-in buffer is too short */
4759 if (res.acl_flags & NFS4_ACL_TRUNC) {
4760 /* Did the user only issue a request for the acl length? */
4761 if (buf == NULL)
4762 goto out_ok;
e50a1c2e 4763 ret = -ERANGE;
1f1ea6c2 4764 goto out_free;
e50a1c2e 4765 }
1f1ea6c2 4766 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4767 if (buf) {
4768 if (res.acl_len > buflen) {
4769 ret = -ERANGE;
4770 goto out_free;
4771 }
1f1ea6c2 4772 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4773 }
1f1ea6c2
TM		 4774out_ok:
4775 ret = res.acl_len;
e50a1c2e 4776out_free:
bf118a34
AA		 4777 for (i = 0; i < npages; i++)
4778 if (pages[i])
4779 __free_page(pages[i]);
331818f1
TM		 4780 if (res.acl_scratch)
4781 __free_page(res.acl_scratch);
aa1870af
BF		 4782 return ret;
4783}
4784
16b4289c
TM		 4785static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4786{
4787 struct nfs4_exception exception = { };
4788 ssize_t ret;
4789 do {
4790 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4791 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4792 if (ret >= 0)
4793 break;
4794 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4795 } while (exception.retry);
4796 return ret;
4797}
4798
e50a1c2e
BF		 4799static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4800{
4801 struct nfs_server *server = NFS_SERVER(inode);
4802 int ret;
4803
4804 if (!nfs4_server_supports_acls(server))
4805 return -EOPNOTSUPP;
4806 ret = nfs_revalidate_inode(server, inode);
4807 if (ret < 0)
4808 return ret;
08a22b39
AK		 4809 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4810 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4811 ret = nfs4_read_cached_acl(inode, buf, buflen);
4812 if (ret != -ENOENT)
bf118a34
AA		 4813 /* -ENOENT is returned if there is no ACL or if there is an ACL
4814 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4815 return ret;
4816 return nfs4_get_acl_uncached(inode, buf, buflen);
4817}
4818
16b4289c 4819static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4820{
4821 struct nfs_server *server = NFS_SERVER(inode);
4822 struct page *pages[NFS4ACL_MAXPAGES];
4823 struct nfs_setaclargs arg = {
4824 .fh = NFS_FH(inode),
4825 .acl_pages = pages,
4826 .acl_len = buflen,
4827 };
73c403a9 4828 struct nfs_setaclres res;
4b580ee3
BF		 4829 struct rpc_message msg = {
4830 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4831 .rpc_argp = &arg,
73c403a9 4832 .rpc_resp = &res,
4b580ee3 4833 };
21f498c2 4834 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4835 int ret, i;
4b580ee3
BF		 4836
4837 if (!nfs4_server_supports_acls(server))
4838 return -EOPNOTSUPP;
21f498c2
TM		 4839 if (npages > ARRAY_SIZE(pages))
4840 return -ERANGE;
8fbcf237 4841 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages);
e9e3d724
NH		 4842 if (i < 0)
4843 return i;
57ec14c5 4844 nfs4_inode_return_delegation(inode);
7c513058 4845 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4846
4847 /*
4848 * Free each page after tx, so the only ref left is
4849 * held by the network stack
4850 */
4851 for (; i > 0; i--)
4852 put_page(pages[i-1]);
4853
08a22b39
AK		 4854 /*
4855 * Acl update can result in inode attribute update.
4856 * so mark the attribute cache invalid.
4857 */
4858 spin_lock(&inode->i_lock);
4859 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4860 spin_unlock(&inode->i_lock);
f41f7418
TM		 4861 nfs_access_zap_cache(inode);
4862 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4863 return ret;
4864}
4865
16b4289c
TM		 4866static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4867{
4868 struct nfs4_exception exception = { };
4869 int err;
4870 do {
c1578b76
TM		 4871 err = __nfs4_proc_set_acl(inode, buf, buflen);
4872 trace_nfs4_set_acl(inode, err);
4873 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4874 &exception);
4875 } while (exception.retry);
4876 return err;
4877}
4878
aa9c2669
DQ		 4879#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4880static int _nfs4_get_security_label(struct inode *inode, void *buf,
4881 size_t buflen)
4882{
4883 struct nfs_server *server = NFS_SERVER(inode);
4884 struct nfs_fattr fattr;
4885 struct nfs4_label label = {0, 0, buflen, buf};
4886
4887 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4888 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4889 .fh = NFS_FH(inode),
4890 .bitmask = bitmask,
4891 };
4892 struct nfs4_getattr_res res = {
4893 .fattr = &fattr,
4894 .label = &label,
4895 .server = server,
4896 };
4897 struct rpc_message msg = {
4898 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4899 .rpc_argp = &arg,
aa9c2669
DQ		 4900 .rpc_resp = &res,
4901 };
4902 int ret;
4903
4904 nfs_fattr_init(&fattr);
4905
fcb63a9b 4906 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4907 if (ret)
4908 return ret;
4909 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4910 return -ENOENT;
4911 if (buflen < label.len)
4912 return -ERANGE;
4913 return 0;
4914}
4915
4916static int nfs4_get_security_label(struct inode *inode, void *buf,
4917 size_t buflen)
4918{
4919 struct nfs4_exception exception = { };
4920 int err;
4921
4922 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4923 return -EOPNOTSUPP;
4924
4925 do {
c1578b76
TM		 4926 err = _nfs4_get_security_label(inode, buf, buflen);
4927 trace_nfs4_get_security_label(inode, err);
4928 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4929 &exception);
4930 } while (exception.retry);
4931 return err;
4932}
4933
4934static int _nfs4_do_set_security_label(struct inode *inode,
4935 struct nfs4_label *ilabel,
4936 struct nfs_fattr *fattr,
4937 struct nfs4_label *olabel)
4938{
4939
4940 struct iattr sattr = {0};
4941 struct nfs_server *server = NFS_SERVER(inode);
4942 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4943 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4944 .fh = NFS_FH(inode),
4945 .iap = &sattr,
4946 .server = server,
4947 .bitmask = bitmask,
4948 .label = ilabel,
4949 };
4950 struct nfs_setattrres res = {
4951 .fattr = fattr,
4952 .label = olabel,
4953 .server = server,
4954 };
4955 struct rpc_message msg = {
4956 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4957 .rpc_argp = &arg,
aa9c2669
DQ		 4958 .rpc_resp = &res,
4959 };
4960 int status;
4961
12207f69 4962 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4963
12207f69 4964 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4965 if (status)
4966 dprintk("%s failed: %d\n", __func__, status);
4967
4968 return status;
4969}
4970
4971static int nfs4_do_set_security_label(struct inode *inode,
4972 struct nfs4_label *ilabel,
4973 struct nfs_fattr *fattr,
4974 struct nfs4_label *olabel)
4975{
4976 struct nfs4_exception exception = { };
4977 int err;
4978
4979 do {
c1578b76
TM		 4980 err = _nfs4_do_set_security_label(inode, ilabel,
4981 fattr, olabel);
4982 trace_nfs4_set_security_label(inode, err);
4983 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4984 &exception);
4985 } while (exception.retry);
4986 return err;
4987}
4988
4989static int
4990nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4991{
4992 struct nfs4_label ilabel, *olabel = NULL;
4993 struct nfs_fattr fattr;
4994 struct rpc_cred *cred;
2b0143b5 4995 struct inode *inode = d_inode(dentry);
aa9c2669
DQ		 4996 int status;
4997
4998 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4999 return -EOPNOTSUPP;
5000
5001 nfs_fattr_init(&fattr);
5002
5003 ilabel.pi = 0;
5004 ilabel.lfs = 0;
5005 ilabel.label = (char *)buf;
5006 ilabel.len = buflen;
5007
5008 cred = rpc_lookup_cred();
5009 if (IS_ERR(cred))
5010 return PTR_ERR(cred);
5011
5012 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
5013 if (IS_ERR(olabel)) {
5014 status = -PTR_ERR(olabel);
5015 goto out;
5016 }
5017
5018 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
5019 if (status == 0)
5020 nfs_setsecurity(inode, &fattr, olabel);
5021
5022 nfs4_label_free(olabel);
5023out:
5024 put_rpccred(cred);
5025 return status;
5026}
5027#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
5028
5029
f092075d
CL		 5030static void nfs4_init_boot_verifier(const struct nfs_client *clp,
5031 nfs4_verifier *bootverf)
cd93710e
CL		 5032{
5033 __be32 verf[2];
5034
2c820d9a
CL		 5035 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
5036 /* An impossible timestamp guarantees this value
5037 * will never match a generated boot time. */
5038 verf[0] = 0;
17f26b12 5039 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 5040 } else {
f092075d 5041 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 5042 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
5043 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 5044 }
cd93710e
CL		 5045 memcpy(bootverf->data, verf, sizeof(bootverf->data));
5046}
5047
a3192688
JL		 5048static int
5049nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 5050{
a3192688
JL		 5051 int result;
5052 size_t len;
5053 char *str;
e984a55a 5054
ceb3a16c 5055 if (clp->cl_owner_id != NULL)
a3192688 5056 return 0;
4a3e5779 5057
a3192688 5058 rcu_read_lock();
4a70316c 5059 len = 14 + strlen(clp->cl_ipaddr) + 1 +
a3192688
JL		 5060 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5061 1 +
5062 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5063 1;
5064 rcu_read_unlock();
5065
5066 if (len > NFS4_OPAQUE_LIMIT + 1)
5067 return -EINVAL;
5068
5069 /*
5070 * Since this string is allocated at mount time, and held until the
5071 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5072 * about a memory-reclaim deadlock.
5073 */
5074 str = kmalloc(len, GFP_KERNEL);
5075 if (!str)
5076 return -ENOMEM;
ceb3a16c 5077
e984a55a 5078 rcu_read_lock();
a3192688
JL		 5079 result = scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
5080 clp->cl_ipaddr,
5081 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5082 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5083 rcu_read_unlock();
a3192688 5084
a3192688
JL		 5085 clp->cl_owner_id = str;
5086 return 0;
e984a55a
CL		 5087}
5088
873e3851
JL		 5089static int
5090nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5091{
5092 int result;
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
5112 result = scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
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 int result;
5124 size_t len;
5125 char *str;
ceb3a16c
TM		 5126
5127 if (clp->cl_owner_id != NULL)
873e3851 5128 return 0;
6f2ea7f2
CL		 5129
5130 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5131 return nfs4_init_uniquifier_client_string(clp);
5132
5133 len = 10 + 10 + 1 + 10 + 1 +
5134 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5135
5136 if (len > NFS4_OPAQUE_LIMIT + 1)
5137 return -EINVAL;
5138
5139 /*
5140 * Since this string is allocated at mount time, and held until the
5141 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5142 * about a memory-reclaim deadlock.
5143 */
5144 str = kmalloc(len, GFP_KERNEL);
5145 if (!str)
5146 return -ENOMEM;
5147
5148 result = scnprintf(str, len, "Linux NFSv%u.%u %s",
5149 clp->rpc_ops->version, clp->cl_minorversion,
5150 clp->cl_rpcclient->cl_nodename);
873e3851
JL		 5151 clp->cl_owner_id = str;
5152 return 0;
e984a55a
CL		 5153}
5154
706cb8db
CL		 5155/*
5156 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5157 * services. Advertise one based on the address family of the
5158 * clientaddr.
5159 */
5160static unsigned int
5161nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5162{
5163 if (strchr(clp->cl_ipaddr, ':') != NULL)
5164 return scnprintf(buf, len, "tcp6");
5165 else
5166 return scnprintf(buf, len, "tcp");
5167}
5168
f11b2a1c
JL		 5169static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5170{
5171 struct nfs4_setclientid *sc = calldata;
5172
5173 if (task->tk_status == 0)
5174 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5175}
5176
5177static const struct rpc_call_ops nfs4_setclientid_ops = {
5178 .rpc_call_done = nfs4_setclientid_done,
5179};
5180
6bbb4ae8
CL		 5181/**
5182 * nfs4_proc_setclientid - Negotiate client ID
5183 * @clp: state data structure
5184 * @program: RPC program for NFSv4 callback service
5185 * @port: IP port number for NFS4 callback service
5186 * @cred: RPC credential to use for this call
5187 * @res: where to place the result
5188 *
5189 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5190 */
bb8b27e5
TM		 5191int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5192 unsigned short port, struct rpc_cred *cred,
5193 struct nfs4_setclientid_res *res)
1da177e4
LT		 5194{
5195 nfs4_verifier sc_verifier;
5196 struct nfs4_setclientid setclientid = {
5197 .sc_verifier = &sc_verifier,
5198 .sc_prog = program,
3a6bb738 5199 .sc_clnt = clp,
1da177e4
LT		 5200 };
5201 struct rpc_message msg = {
5202 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5203 .rpc_argp = &setclientid,
bb8b27e5 5204 .rpc_resp = res,
286d7d6a 5205 .rpc_cred = cred,
1da177e4 5206 };
f11b2a1c
JL		 5207 struct rpc_task *task;
5208 struct rpc_task_setup task_setup_data = {
5209 .rpc_client = clp->cl_rpcclient,
5210 .rpc_message = &msg,
5211 .callback_ops = &nfs4_setclientid_ops,
5212 .callback_data = &setclientid,
5213 .flags = RPC_TASK_TIMEOUT,
5214 };
6bbb4ae8 5215 int status;
1da177e4 5216
de734831 5217 /* nfs_client_id4 */
f092075d 5218 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5219
5220 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5221 status = nfs4_init_uniform_client_string(clp);
5222 else
a3192688 5223 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5224
5225 if (status)
5226 goto out;
3a6bb738 5227
de734831 5228 /* cb_client4 */
706cb8db
CL		 5229 setclientid.sc_netid_len =
5230 nfs4_init_callback_netid(clp,
5231 setclientid.sc_netid,
5232 sizeof(setclientid.sc_netid));
de734831 5233 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5234 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5235 clp->cl_ipaddr, port >> 8, port & 255);
5236
3a6bb738 5237 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5238 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5239 clp->cl_owner_id);
f11b2a1c
JL		 5240 task = rpc_run_task(&task_setup_data);
5241 if (IS_ERR(task)) {
5242 status = PTR_ERR(task);
5243 goto out;
5244 }
5245 status = task->tk_status;
5246 if (setclientid.sc_cred) {
5247 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5248 put_rpccred(setclientid.sc_cred);
5249 }
5250 rpc_put_task(task);
5251out:
c6d01c6f 5252 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5253 dprintk("NFS reply setclientid: %d\n", status);
5254 return status;
1da177e4
LT		 5255}
5256
6bbb4ae8
CL		 5257/**
5258 * nfs4_proc_setclientid_confirm - Confirm client ID
5259 * @clp: state data structure
5260 * @res: result of a previous SETCLIENTID
5261 * @cred: RPC credential to use for this call
5262 *
5263 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5264 */
fd954ae1 5265int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5266 struct nfs4_setclientid_res *arg,
5267 struct rpc_cred *cred)
1da177e4 5268{
1da177e4
LT		 5269 struct rpc_message msg = {
5270 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5271 .rpc_argp = arg,
286d7d6a 5272 .rpc_cred = cred,
1da177e4 5273 };
1da177e4
LT		 5274 int status;
5275
6bbb4ae8
CL		 5276 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5277 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5278 clp->cl_clientid);
1bd714f2 5279 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5280 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5281 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5282 return status;
5283}
5284
fe650407
TM		 5285struct nfs4_delegreturndata {
5286 struct nfs4_delegreturnargs args;
fa178f29 5287 struct nfs4_delegreturnres res;
fe650407
TM		 5288 struct nfs_fh fh;
5289 nfs4_stateid stateid;
26e976a8 5290 unsigned long timestamp;
fa178f29 5291 struct nfs_fattr fattr;
fe650407 5292 int rpc_status;
039b756a
PT		 5293 struct inode *inode;
5294 bool roc;
5295 u32 roc_barrier;
fe650407
TM		 5296};
5297
fe650407
TM		 5298static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5299{
5300 struct nfs4_delegreturndata *data = calldata;
938e1010 5301
14516c3a
TM		 5302 if (!nfs4_sequence_done(task, &data->res.seq_res))
5303 return;
938e1010 5304
ca8acf8d 5305 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5306 switch (task->tk_status) {
79708861 5307 case 0:
fa178f29 5308 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5309 case -NFS4ERR_ADMIN_REVOKED:
5310 case -NFS4ERR_DELEG_REVOKED:
5311 case -NFS4ERR_BAD_STATEID:
5312 case -NFS4ERR_OLD_STATEID:
5313 case -NFS4ERR_STALE_STATEID:
5314 case -NFS4ERR_EXPIRED:
5315 task->tk_status = 0;
039b756a
PT		 5316 if (data->roc)
5317 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5318 break;
79708861 5319 default:
8478eaa1
N		 5320 if (nfs4_async_handle_error(task, data->res.server,
5321 NULL, NULL) == -EAGAIN) {
d00c5d43 5322 rpc_restart_call_prepare(task);
79708861
RL		 5323 return;
5324 }
5325 }
5326 data->rpc_status = task->tk_status;
fe650407
TM		 5327}
5328
5329static void nfs4_delegreturn_release(void *calldata)
5330{
039b756a 5331 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5332 struct inode *inode = data->inode;
039b756a 5333
ea7c38fe
TM		 5334 if (inode) {
5335 if (data->roc)
5336 pnfs_roc_release(inode);
5337 nfs_iput_and_deactive(inode);
5338 }
fe650407
TM		 5339 kfree(calldata);
5340}
5341
938e1010
AA		 5342static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5343{
5344 struct nfs4_delegreturndata *d_data;
5345
5346 d_data = (struct nfs4_delegreturndata *)data;
5347
500d701f
PT		 5348 if (nfs4_wait_on_layoutreturn(d_data->inode, task))
5349 return;
5350
4ff376fe
TM		 5351 if (d_data->roc)
5352 pnfs_roc_get_barrier(d_data->inode, &d_data->roc_barrier);
039b756a 5353
d9afbd1b
TM		 5354 nfs4_setup_sequence(d_data->res.server,
5355 &d_data->args.seq_args,
5356 &d_data->res.seq_res,
5357 task);
938e1010 5358}
938e1010 5359
c8d149f3 5360static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5361 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5362 .rpc_call_done = nfs4_delegreturn_done,
5363 .rpc_release = nfs4_delegreturn_release,
5364};
5365
e6f81075 5366static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5367{
5368 struct nfs4_delegreturndata *data;
fa178f29 5369 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5370 struct rpc_task *task;
5138fde0
TM		 5371 struct rpc_message msg = {
5372 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5373 .rpc_cred = cred,
5374 };
c970aa85
TM		 5375 struct rpc_task_setup task_setup_data = {
5376 .rpc_client = server->client,
5138fde0 5377 .rpc_message = &msg,
c970aa85
TM		 5378 .callback_ops = &nfs4_delegreturn_ops,
5379 .flags = RPC_TASK_ASYNC,
5380 };
e6f81075 5381 int status = 0;
fe650407 5382
8535b2be 5383 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5384 if (data == NULL)
5385 return -ENOMEM;
a9c92d6b 5386 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5387 data->args.fhandle = &data->fh;
5388 data->args.stateid = &data->stateid;
9e907fec 5389 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5390 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5391 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5392 data->res.fattr = &data->fattr;
5393 data->res.server = server;
5138fde0 5394 nfs_fattr_init(data->res.fattr);
26e976a8 5395 data->timestamp = jiffies;
fe650407 5396 data->rpc_status = 0;
ea7c38fe
TM		 5397 data->inode = nfs_igrab_and_active(inode);
5398 if (data->inode)
5399 data->roc = nfs4_roc(inode);
fe650407 5400
c970aa85 5401 task_setup_data.callback_data = data;
1174dd1f
TM		 5402 msg.rpc_argp = &data->args;
5403 msg.rpc_resp = &data->res;
c970aa85 5404 task = rpc_run_task(&task_setup_data);
7a1218a2 5405 if (IS_ERR(task))
fe650407 5406 return PTR_ERR(task);
e6f81075
TM		 5407 if (!issync)
5408 goto out;
fe650407 5409 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5410 if (status != 0)
5411 goto out;
5412 status = data->rpc_status;
e144cbcc
TM		 5413 if (status == 0)
5414 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5415 else
5416 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5417out:
e6b3c4db 5418 rpc_put_task(task);
fe650407 5419 return status;
1da177e4
LT		 5420}
5421
e6f81075 5422int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5423{
5424 struct nfs_server *server = NFS_SERVER(inode);
5425 struct nfs4_exception exception = { };
5426 int err;
5427 do {
e6f81075 5428 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5429 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5430 switch (err) {
5431 case -NFS4ERR_STALE_STATEID:
5432 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5433 case 0:
5434 return 0;
5435 }
5436 err = nfs4_handle_exception(server, err, &exception);
5437 } while (exception.retry);
5438 return err;
5439}
5440
5441#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5442#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5443
5444/*
5445 * sleep, with exponential backoff, and retry the LOCK operation.
5446 */
5447static unsigned long
5448nfs4_set_lock_task_retry(unsigned long timeout)
5449{
416ad3c9 5450 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5451 timeout <<= 1;
5452 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5453 return NFS4_LOCK_MAXTIMEOUT;
5454 return timeout;
5455}
5456
1da177e4
LT		 5457static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5458{
5459 struct inode *inode = state->inode;
5460 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5461 struct nfs_client *clp = server->nfs_client;
911d1aaf 5462 struct nfs_lockt_args arg = {
1da177e4 5463 .fh = NFS_FH(inode),
911d1aaf 5464 .fl = request,
1da177e4 5465 };
911d1aaf
TM		 5466 struct nfs_lockt_res res = {
5467 .denied = request,
1da177e4
LT		 5468 };
5469 struct rpc_message msg = {
5470 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5471 .rpc_argp = &arg,
5472 .rpc_resp = &res,
5473 .rpc_cred = state->owner->so_cred,
5474 };
1da177e4
LT		 5475 struct nfs4_lock_state *lsp;
5476 int status;
5477
911d1aaf 5478 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5479 status = nfs4_set_lock_state(state, request);
5480 if (status != 0)
5481 goto out;
5482 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5483 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5484 arg.lock_owner.s_dev = server->s_dev;
7c513058 5485 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5486 switch (status) {
5487 case 0:
5488 request->fl_type = F_UNLCK;
5489 break;
5490 case -NFS4ERR_DENIED:
5491 status = 0;
1da177e4 5492 }
70cc6487 5493 request->fl_ops->fl_release_private(request);
a6f951dd 5494 request->fl_ops = NULL;
8d0a8a9d 5495out:
1da177e4
LT		 5496 return status;
5497}
5498
5499static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5500{
5501 struct nfs4_exception exception = { };
5502 int err;
5503
5504 do {
d1b748a5
TM		 5505 err = _nfs4_proc_getlk(state, cmd, request);
5506 trace_nfs4_get_lock(request, state, cmd, err);
5507 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5508 &exception);
5509 } while (exception.retry);
5510 return err;
5511}
5512
83bfff23 5513static int do_vfs_lock(struct inode *inode, struct file_lock *fl)
1da177e4 5514{
4f656367 5515 return locks_lock_inode_wait(inode, fl);
1da177e4
LT		 5516}
5517
faf5f49c 5518struct nfs4_unlockdata {
911d1aaf
TM		 5519 struct nfs_locku_args arg;
5520 struct nfs_locku_res res;
faf5f49c
TM		 5521 struct nfs4_lock_state *lsp;
5522 struct nfs_open_context *ctx;
911d1aaf 5523 struct file_lock fl;
516285eb 5524 struct nfs_server *server;
26e976a8 5525 unsigned long timestamp;
faf5f49c
TM		 5526};
5527
911d1aaf
TM		 5528static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5529 struct nfs_open_context *ctx,
5530 struct nfs4_lock_state *lsp,
5531 struct nfs_seqid *seqid)
5532{
5533 struct nfs4_unlockdata *p;
5534 struct inode *inode = lsp->ls_state->inode;
5535
8535b2be 5536 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5537 if (p == NULL)
5538 return NULL;
5539 p->arg.fh = NFS_FH(inode);
5540 p->arg.fl = &p->fl;
5541 p->arg.seqid = seqid;
c1d51931 5542 p->res.seqid = seqid;
911d1aaf
TM		 5543 p->lsp = lsp;
5544 atomic_inc(&lsp->ls_count);
5545 /* Ensure we don't close file until we're done freeing locks! */
5546 p->ctx = get_nfs_open_context(ctx);
5547 memcpy(&p->fl, fl, sizeof(p->fl));
5548 p->server = NFS_SERVER(inode);
5549 return p;
5550}
5551
06f814a3 5552static void nfs4_locku_release_calldata(void *data)
faf5f49c 5553{
963d8fe5 5554 struct nfs4_unlockdata *calldata = data;
911d1aaf 5555 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5556 nfs4_put_lock_state(calldata->lsp);
5557 put_nfs_open_context(calldata->ctx);
5558 kfree(calldata);
faf5f49c
TM		 5559}
5560
963d8fe5 5561static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5562{
963d8fe5 5563 struct nfs4_unlockdata *calldata = data;
faf5f49c 5564
14516c3a
TM		 5565 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5566 return;
faf5f49c
TM		 5567 switch (task->tk_status) {
5568 case 0:
26e976a8 5569 renew_lease(calldata->server, calldata->timestamp);
83bfff23 5570 do_vfs_lock(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 5571 if (nfs4_update_lock_stateid(calldata->lsp,
5572 &calldata->res.stateid))
5573 break;
9e33bed5
TM		 5574 case -NFS4ERR_BAD_STATEID:
5575 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5576 case -NFS4ERR_STALE_STATEID:
5577 case -NFS4ERR_EXPIRED:
425c1d4e
TM		 5578 if (!nfs4_stateid_match(&calldata->arg.stateid,
5579 &calldata->lsp->ls_stateid))
5580 rpc_restart_call_prepare(task);
faf5f49c
TM		 5581 break;
5582 default:
8478eaa1
N		 5583 if (nfs4_async_handle_error(task, calldata->server,
5584 NULL, NULL) == -EAGAIN)
d00c5d43 5585 rpc_restart_call_prepare(task);
faf5f49c 5586 }
2b1bc308 5587 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5588}
5589
4ce70ada 5590static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5591{
4ce70ada 5592 struct nfs4_unlockdata *calldata = data;
faf5f49c 5593
911d1aaf 5594 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5595 goto out_wait;
425c1d4e 5596 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5597 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5598 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5599 goto out_no_action;
faf5f49c 5600 }
26e976a8 5601 calldata->timestamp = jiffies;
035168ab 5602 if (nfs4_setup_sequence(calldata->server,
a893693c 5603 &calldata->arg.seq_args,
2240a9e2
TM		 5604 &calldata->res.seq_res,
5605 task) != 0)
5606 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5607 return;
5608out_no_action:
5609 task->tk_action = NULL;
5610out_wait:
5611 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5612}
5613
963d8fe5 5614static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5615 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5616 .rpc_call_done = nfs4_locku_done,
06f814a3 5617 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5618};
5619
a5d16a4d
TM		 5620static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5621 struct nfs_open_context *ctx,
5622 struct nfs4_lock_state *lsp,
5623 struct nfs_seqid *seqid)
5624{
5625 struct nfs4_unlockdata *data;
5138fde0
TM		 5626 struct rpc_message msg = {
5627 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5628 .rpc_cred = ctx->cred,
5629 };
c970aa85
TM		 5630 struct rpc_task_setup task_setup_data = {
5631 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5632 .rpc_message = &msg,
c970aa85 5633 .callback_ops = &nfs4_locku_ops,
101070ca 5634 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5635 .flags = RPC_TASK_ASYNC,
5636 };
a5d16a4d 5637
fa940720
WAA		 5638 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5639 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5640
137d6aca
FF		 5641 /* Ensure this is an unlock - when canceling a lock, the
5642 * canceled lock is passed in, and it won't be an unlock.
5643 */
5644 fl->fl_type = F_UNLCK;
5645
a5d16a4d
TM		 5646 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5647 if (data == NULL) {
5648 nfs_free_seqid(seqid);
5649 return ERR_PTR(-ENOMEM);
5650 }
5651
a9c92d6b 5652 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5653 msg.rpc_argp = &data->arg;
5654 msg.rpc_resp = &data->res;
c970aa85
TM		 5655 task_setup_data.callback_data = data;
5656 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5657}
5658
faf5f49c
TM		 5659static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5660{
65b62a29
TM		 5661 struct inode *inode = state->inode;
5662 struct nfs4_state_owner *sp = state->owner;
5663 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5664 struct nfs_seqid *seqid;
1da177e4 5665 struct nfs4_lock_state *lsp;
06f814a3 5666 struct rpc_task *task;
b4019c0e 5667 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 5668 int status = 0;
536ff0f8 5669 unsigned char fl_flags = request->fl_flags;
faf5f49c 5670
8d0a8a9d 5671 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5672 /* Unlock _before_ we do the RPC call */
5673 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5674 /* Exclude nfs_delegation_claim_locks() */
5675 mutex_lock(&sp->so_delegreturn_mutex);
5676 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 5677 down_read(&nfsi->rwsem);
83bfff23 5678 if (do_vfs_lock(inode, request) == -ENOENT) {
19e03c57 5679 up_read(&nfsi->rwsem);
65b62a29 5680 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5681 goto out;
19e03c57
TM		 5682 }
5683 up_read(&nfsi->rwsem);
65b62a29 5684 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5685 if (status != 0)
9b073574
TM		 5686 goto out;
5687 /* Is this a delegated lock? */
8d0a8a9d 5688 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5689 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5690 goto out;
b4019c0e
TM		 5691 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5692 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5693 status = -ENOMEM;
badc76dd 5694 if (IS_ERR(seqid))
9b073574 5695 goto out;
cd3758e3 5696 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5697 status = PTR_ERR(task);
5698 if (IS_ERR(task))
9b073574 5699 goto out;
a5d16a4d 5700 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5701 rpc_put_task(task);
9b073574 5702out:
536ff0f8 5703 request->fl_flags = fl_flags;
d1b748a5 5704 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5705 return status;
5706}
5707
a5d16a4d
TM		 5708struct nfs4_lockdata {
5709 struct nfs_lock_args arg;
5710 struct nfs_lock_res res;
5711 struct nfs4_lock_state *lsp;
5712 struct nfs_open_context *ctx;
5713 struct file_lock fl;
26e976a8 5714 unsigned long timestamp;
a5d16a4d
TM		 5715 int rpc_status;
5716 int cancelled;
66179efe 5717 struct nfs_server *server;
a5d16a4d
TM		 5718};
5719
5720static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5721 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5722 gfp_t gfp_mask)
1da177e4 5723{
a5d16a4d
TM		 5724 struct nfs4_lockdata *p;
5725 struct inode *inode = lsp->ls_state->inode;
1da177e4 5726 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 5727 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 5728
8535b2be 5729 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5730 if (p == NULL)
5731 return NULL;
5732
5733 p->arg.fh = NFS_FH(inode);
5734 p->arg.fl = &p->fl;
8535b2be 5735 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 5736 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 5737 goto out_free;
b4019c0e
TM		 5738 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5739 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 5740 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 5741 goto out_free_seqid;
7539bbab 5742 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5743 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5744 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5745 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5746 p->lsp = lsp;
66179efe 5747 p->server = server;
a5d16a4d
TM		 5748 atomic_inc(&lsp->ls_count);
5749 p->ctx = get_nfs_open_context(ctx);
feaff8e5 5750 get_file(fl->fl_file);
a5d16a4d
TM		 5751 memcpy(&p->fl, fl, sizeof(p->fl));
5752 return p;
2f74c0a0
TM		 5753out_free_seqid:
5754 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5755out_free:
5756 kfree(p);
5757 return NULL;
5758}
5759
5760static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5761{
5762 struct nfs4_lockdata *data = calldata;
5763 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5764
3110ff80 5765 dprintk("%s: begin!\n", __func__);
2f74c0a0 5766 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5767 goto out_wait;
a5d16a4d 5768 /* Do we need to do an open_to_lock_owner? */
6b447539 5769 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 5770 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5771 goto out_release_lock_seqid;
8fe72bac 5772 }
425c1d4e
TM		 5773 nfs4_stateid_copy(&data->arg.open_stateid,
5774 &state->open_stateid);
a5d16a4d 5775 data->arg.new_lock_owner = 1;
c1d51931 5776 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 5777 } else {
2f74c0a0 5778 data->arg.new_lock_owner = 0;
425c1d4e
TM		 5779 nfs4_stateid_copy(&data->arg.lock_stateid,
5780 &data->lsp->ls_stateid);
5781 }
5d422301
TM		 5782 if (!nfs4_valid_open_stateid(state)) {
5783 data->rpc_status = -EBADF;
5784 task->tk_action = NULL;
5785 goto out_release_open_seqid;
5786 }
26e976a8 5787 data->timestamp = jiffies;
035168ab
TM		 5788 if (nfs4_setup_sequence(data->server,
5789 &data->arg.seq_args,
2240a9e2 5790 &data->res.seq_res,
d9afbd1b 5791 task) == 0)
66179efe 5792 return;
5d422301 5793out_release_open_seqid:
2240a9e2
TM		 5794 nfs_release_seqid(data->arg.open_seqid);
5795out_release_lock_seqid:
5796 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5797out_wait:
5798 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5799 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5800}
5801
a5d16a4d
TM		 5802static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5803{
5804 struct nfs4_lockdata *data = calldata;
39071e6f 5805 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 5806
3110ff80 5807 dprintk("%s: begin!\n", __func__);
a5d16a4d 5808
14516c3a
TM		 5809 if (!nfs4_sequence_done(task, &data->res.seq_res))
5810 return;
66179efe 5811
a5d16a4d 5812 data->rpc_status = task->tk_status;
425c1d4e
TM		 5813 switch (task->tk_status) {
5814 case 0:
2b0143b5 5815 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 5816 data->timestamp);
c69899a1
TM		 5817 if (data->arg.new_lock) {
5818 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
83bfff23 5819 if (do_vfs_lock(lsp->ls_state->inode, &data->fl) < 0) {
c69899a1
TM		 5820 rpc_restart_call_prepare(task);
5821 break;
5822 }
5823 }
39071e6f
TM		 5824 if (data->arg.new_lock_owner != 0) {
5825 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5826 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5827 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5828 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5829 rpc_restart_call_prepare(task);
425c1d4e
TM		 5830 break;
5831 case -NFS4ERR_BAD_STATEID:
5832 case -NFS4ERR_OLD_STATEID:
5833 case -NFS4ERR_STALE_STATEID:
5834 case -NFS4ERR_EXPIRED:
5835 if (data->arg.new_lock_owner != 0) {
5836 if (!nfs4_stateid_match(&data->arg.open_stateid,
5837 &lsp->ls_state->open_stateid))
5838 rpc_restart_call_prepare(task);
5839 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5840 &lsp->ls_stateid))
5841 rpc_restart_call_prepare(task);
a5d16a4d 5842 }
3110ff80 5843 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5844}
5845
5846static void nfs4_lock_release(void *calldata)
5847{
5848 struct nfs4_lockdata *data = calldata;
5849
3110ff80 5850 dprintk("%s: begin!\n", __func__);
2f74c0a0 5851 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5852 if (data->cancelled != 0) {
5853 struct rpc_task *task;
5854 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5855 data->arg.lock_seqid);
5856 if (!IS_ERR(task))
bf294b41 5857 rpc_put_task_async(task);
3110ff80 5858 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5859 } else
5860 nfs_free_seqid(data->arg.lock_seqid);
5861 nfs4_put_lock_state(data->lsp);
5862 put_nfs_open_context(data->ctx);
feaff8e5 5863 fput(data->fl.fl_file);
a5d16a4d 5864 kfree(data);
3110ff80 5865 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5866}
5867
5868static const struct rpc_call_ops nfs4_lock_ops = {
5869 .rpc_call_prepare = nfs4_lock_prepare,
5870 .rpc_call_done = nfs4_lock_done,
5871 .rpc_release = nfs4_lock_release,
5872};
5873
2bee72a6
TM		 5874static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5875{
2bee72a6
TM		 5876 switch (error) {
5877 case -NFS4ERR_ADMIN_REVOKED:
5878 case -NFS4ERR_BAD_STATEID:
ecac799a 5879 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5880 if (new_lock_owner != 0 ||
795a88c9 5881 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5882 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5883 break;
5884 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5885 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5886 case -NFS4ERR_EXPIRED:
5887 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5888 };
5889}
5890
afe6c27c 5891static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5892{
5893 struct nfs4_lockdata *data;
5894 struct rpc_task *task;
5138fde0
TM		 5895 struct rpc_message msg = {
5896 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5897 .rpc_cred = state->owner->so_cred,
5898 };
c970aa85
TM		 5899 struct rpc_task_setup task_setup_data = {
5900 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5901 .rpc_message = &msg,
c970aa85 5902 .callback_ops = &nfs4_lock_ops,
101070ca 5903 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5904 .flags = RPC_TASK_ASYNC,
5905 };
a5d16a4d
TM		 5906 int ret;
5907
3110ff80 5908 dprintk("%s: begin!\n", __func__);
cd3758e3 5909 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5910 fl->fl_u.nfs4_fl.owner,
5911 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5912 if (data == NULL)
5913 return -ENOMEM;
5914 if (IS_SETLKW(cmd))
5915 data->arg.block = 1;
a9c92d6b 5916 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5917 msg.rpc_argp = &data->arg;
5918 msg.rpc_resp = &data->res;
c970aa85 5919 task_setup_data.callback_data = data;
8fe72bac
TM		 5920 if (recovery_type > NFS_LOCK_NEW) {
5921 if (recovery_type == NFS_LOCK_RECLAIM)
5922 data->arg.reclaim = NFS_LOCK_RECLAIM;
5923 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 5924 } else
5925 data->arg.new_lock = 1;
c970aa85 5926 task = rpc_run_task(&task_setup_data);
7a1218a2 5927 if (IS_ERR(task))
a5d16a4d 5928 return PTR_ERR(task);
a5d16a4d
TM		 5929 ret = nfs4_wait_for_completion_rpc_task(task);
5930 if (ret == 0) {
5931 ret = data->rpc_status;
2bee72a6
TM		 5932 if (ret)
5933 nfs4_handle_setlk_error(data->server, data->lsp,
5934 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5935 } else
5936 data->cancelled = 1;
e6b3c4db 5937 rpc_put_task(task);
3110ff80 5938 dprintk("%s: done, ret = %d!\n", __func__, 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);
d1b748a5 5955 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5956 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5957 break;
5958 nfs4_handle_exception(server, err, &exception);
5959 } while (exception.retry);
5960 return err;
1da177e4
LT		 5961}
5962
5963static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5964{
202b50dc 5965 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5966 struct nfs4_exception exception = {
5967 .inode = state->inode,
5968 };
202b50dc
TM		 5969 int err;
5970
6bfc93ef
TM		 5971 err = nfs4_set_lock_state(state, request);
5972 if (err != 0)
5973 return err;
f6de7a39 5974 if (!recover_lost_locks) {
ef1820f9
N		 5975 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5976 return 0;
5977 }
202b50dc 5978 do {
42a2d13e
TM		 5979 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5980 return 0;
afe6c27c 5981 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5982 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5983 switch (err) {
5984 default:
5985 goto out;
5986 case -NFS4ERR_GRACE:
5987 case -NFS4ERR_DELAY:
5988 nfs4_handle_exception(server, err, &exception);
5989 err = 0;
5990 }
202b50dc 5991 } while (exception.retry);
a9ed2e25 5992out:
202b50dc 5993 return err;
1da177e4
LT		 5994}
5995
f062eb6c 5996#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5997/**
5998 * nfs41_check_expired_locks - possibly free a lock stateid
5999 *
6000 * @state: NFSv4 state for an inode
6001 *
6002 * Returns NFS_OK if recovery for this stateid is now finished.
6003 * Otherwise a negative NFS4ERR value is returned.
6004 */
b01dd1d8 6005static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 6006{
eb64cf96 6007 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 6008 struct nfs4_lock_state *lsp;
f062eb6c
BS		 6009 struct nfs_server *server = NFS_SERVER(state->inode);
6010
b01dd1d8 6011 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 6012 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 6013 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
6014
6015 status = nfs41_test_stateid(server,
6016 &lsp->ls_stateid,
6017 cred);
08cb47fa 6018 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 6019 if (status != NFS_OK) {
3e60ffdd
CL		 6020 /* Free the stateid unless the server
6021 * informs us the stateid is unrecognized. */
89af2739
CL		 6022 if (status != -NFS4ERR_BAD_STATEID)
6023 nfs41_free_stateid(server,
ab7cb0df
TM		 6024 &lsp->ls_stateid,
6025 cred);
795a88c9 6026 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 6027 ret = status;
6028 }
6029 }
6030 };
6031
6032 return ret;
6033}
6034
6035static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6036{
6037 int status = NFS_OK;
6038
6039 if (test_bit(LK_STATE_IN_USE, &state->flags))
6040 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 6041 if (status != NFS_OK)
6042 status = nfs4_lock_expired(state, request);
6043 return status;
f062eb6c
BS		 6044}
6045#endif
6046
1da177e4
LT		 6047static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6048{
19e03c57 6049 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 6050 unsigned char fl_flags = request->fl_flags;
8e469ebd 6051 int status = -ENOLCK;
1da177e4 6052
8e469ebd
TM		 6053 if ((fl_flags & FL_POSIX) &&
6054 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6055 goto out;
6bfc93ef 6056 /* Is this a delegated open? */
6bfc93ef
TM		 6057 status = nfs4_set_lock_state(state, request);
6058 if (status != 0)
6059 goto out;
01c3b861 6060 request->fl_flags |= FL_ACCESS;
83bfff23 6061 status = do_vfs_lock(state->inode, request);
01c3b861
TM		 6062 if (status < 0)
6063 goto out;
19e03c57 6064 down_read(&nfsi->rwsem);
01c3b861 6065 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6066 /* Yes: cache locks! */
01c3b861 6067 /* ...but avoid races with delegation recall... */
19e03c57 6068 request->fl_flags = fl_flags & ~FL_SLEEP;
83bfff23 6069 status = do_vfs_lock(state->inode, request);
c69899a1 6070 up_read(&nfsi->rwsem);
9a99af49 6071 goto out;
9a99af49 6072 }
19e03c57 6073 up_read(&nfsi->rwsem);
c69899a1 6074 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6075out:
6076 request->fl_flags = fl_flags;
1da177e4
LT		 6077 return status;
6078}
6079
6080static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6081{
a1d0b5ee
TM		 6082 struct nfs4_exception exception = {
6083 .state = state,
05ffe24f 6084 .inode = state->inode,
a1d0b5ee 6085 };
1da177e4
LT		 6086 int err;
6087
6088 do {
965b5d67 6089 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 6090 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 6091 if (err == -NFS4ERR_DENIED)
6092 err = -EAGAIN;
1da177e4 6093 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6094 err, &exception);
1da177e4
LT		 6095 } while (exception.retry);
6096 return err;
6097}
6098
6099static int
6100nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6101{
6102 struct nfs_open_context *ctx;
6103 struct nfs4_state *state;
6104 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6105 int status;
6106
6107 /* verify open state */
cd3758e3 6108 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6109 state = ctx->state;
6110
6111 if (request->fl_start < 0 || request->fl_end < 0)
6112 return -EINVAL;
6113
d953126a
TM		 6114 if (IS_GETLK(cmd)) {
6115 if (state != NULL)
6116 return nfs4_proc_getlk(state, F_GETLK, request);
6117 return 0;
6118 }
1da177e4
LT		 6119
6120 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6121 return -EINVAL;
6122
d953126a
TM		 6123 if (request->fl_type == F_UNLCK) {
6124 if (state != NULL)
6125 return nfs4_proc_unlck(state, cmd, request);
6126 return 0;
6127 }
1da177e4 6128
d953126a
TM		 6129 if (state == NULL)
6130 return -ENOLCK;
55725513
TM		 6131 /*
6132 * Don't rely on the VFS having checked the file open mode,
6133 * since it won't do this for flock() locks.
6134 */
f44106e2 6135 switch (request->fl_type) {
55725513
TM		 6136 case F_RDLCK:
6137 if (!(filp->f_mode & FMODE_READ))
6138 return -EBADF;
6139 break;
6140 case F_WRLCK:
6141 if (!(filp->f_mode & FMODE_WRITE))
6142 return -EBADF;
6143 }
6144
1da177e4
LT		 6145 do {
6146 status = nfs4_proc_setlk(state, cmd, request);
6147 if ((status != -EAGAIN) || IS_SETLK(cmd))
6148 break;
6149 timeout = nfs4_set_lock_task_retry(timeout);
6150 status = -ERESTARTSYS;
6151 if (signalled())
6152 break;
6153 } while(status < 0);
1da177e4
LT		 6154 return status;
6155}
6156
db4f2e63 6157int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6158{
6159 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6160 int err;
6161
6162 err = nfs4_set_lock_state(state, fl);
6163 if (err != 0)
db4f2e63 6164 return err;
4a706fa0 6165 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6166 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6167}
6b3b5496 6168
cf470c3e
TM		 6169struct nfs_release_lockowner_data {
6170 struct nfs4_lock_state *lsp;
5ae67c4f 6171 struct nfs_server *server;
cf470c3e 6172 struct nfs_release_lockowner_args args;
b7e63a10 6173 struct nfs_release_lockowner_res res;
60ea6812 6174 unsigned long timestamp;
cf470c3e
TM		 6175};
6176
fbd4bfd1
CL		 6177static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6178{
6179 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6180 struct nfs_server *server = data->server;
cb04ad2a
PT		 6181 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6182 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6183 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6184 data->timestamp = jiffies;
fbd4bfd1
CL		 6185}
6186
6187static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6188{
6189 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6190 struct nfs_server *server = data->server;
6191
b7e63a10 6192 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6193
6194 switch (task->tk_status) {
6195 case 0:
6196 renew_lease(server, data->timestamp);
6197 break;
6198 case -NFS4ERR_STALE_CLIENTID:
6199 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6200 nfs4_schedule_lease_recovery(server->nfs_client);
6201 break;
60ea6812
CL		 6202 case -NFS4ERR_LEASE_MOVED:
6203 case -NFS4ERR_DELAY:
8478eaa1
N		 6204 if (nfs4_async_handle_error(task, server,
6205 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6206 rpc_restart_call_prepare(task);
6207 }
fbd4bfd1
CL		 6208}
6209
d3c7b7cc
TM		 6210static void nfs4_release_lockowner_release(void *calldata)
6211{
cf470c3e 6212 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6213 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6214 kfree(calldata);
6215}
6216
17280175 6217static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6218 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6219 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6220 .rpc_release = nfs4_release_lockowner_release,
6221};
6222
f1cdae87
JL		 6223static void
6224nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6225{
cf470c3e 6226 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6227 struct rpc_message msg = {
6228 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6229 };
6230
6231 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6232 return;
fbd4bfd1 6233
cf470c3e
TM		 6234 data = kmalloc(sizeof(*data), GFP_NOFS);
6235 if (!data)
f1cdae87 6236 return;
cf470c3e 6237 data->lsp = lsp;
5ae67c4f 6238 data->server = server;
cf470c3e
TM		 6239 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6240 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6241 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6242
cf470c3e 6243 msg.rpc_argp = &data->args;
b7e63a10
TM		 6244 msg.rpc_resp = &data->res;
6245 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6246 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6247}
6248
aa1870af
BF		 6249#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6250
d9a82a04
AG		 6251static int nfs4_xattr_set_nfs4_acl(const struct xattr_handler *handler,
6252 struct dentry *dentry, const char *key,
64c2ce8b 6253 const void *buf, size_t buflen,
d9a82a04 6254 int flags)
6b3b5496 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{
2b0143b5 6263 return nfs4_proc_get_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6264}
6265
d9a82a04
AG		 6266static size_t nfs4_xattr_list_nfs4_acl(const struct xattr_handler *handler,
6267 struct dentry *dentry, char *list,
64c2ce8b 6268 size_t list_len, const char *name,
d9a82a04 6269 size_t name_len)
6b3b5496 6270{
64c2ce8b 6271 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 6272
2b0143b5 6273 if (!nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))))
096455a2 6274 return 0;
64c2ce8b
AK		 6275
6276 if (list && len <= list_len)
6277 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6278 return len;
6b3b5496
BF		 6279}
6280
c9bccef6
DQ		 6281#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6282static inline int nfs4_server_supports_labels(struct nfs_server *server)
6283{
6284 return server->caps & NFS_CAP_SECURITY_LABEL;
6285}
6286
d9a82a04
AG		 6287static int nfs4_xattr_set_nfs4_label(const struct xattr_handler *handler,
6288 struct dentry *dentry, const char *key,
6289 const void *buf, size_t buflen,
6290 int flags)
c9bccef6
DQ		 6291{
6292 if (security_ismaclabel(key))
6293 return nfs4_set_security_label(dentry, buf, buflen);
6294
6295 return -EOPNOTSUPP;
6296}
6297
d9a82a04
AG		 6298static int nfs4_xattr_get_nfs4_label(const struct xattr_handler *handler,
6299 struct dentry *dentry, const char *key,
6300 void *buf, size_t buflen)
c9bccef6
DQ		 6301{
6302 if (security_ismaclabel(key))
2b0143b5 6303 return nfs4_get_security_label(d_inode(dentry), buf, buflen);
c9bccef6
DQ		 6304 return -EOPNOTSUPP;
6305}
6306
d9a82a04
AG		 6307static size_t nfs4_xattr_list_nfs4_label(const struct xattr_handler *handler,
6308 struct dentry *dentry, char *list,
6309 size_t list_len, const char *name,
6310 size_t name_len)
c9bccef6
DQ		 6311{
6312 size_t len = 0;
6313
2b0143b5
DH		 6314 if (nfs_server_capable(d_inode(dentry), NFS_CAP_SECURITY_LABEL)) {
6315 len = security_inode_listsecurity(d_inode(dentry), NULL, 0);
c9bccef6 6316 if (list && len <= list_len)
2b0143b5 6317 security_inode_listsecurity(d_inode(dentry), list, len);
c9bccef6
DQ		 6318 }
6319 return len;
6320}
6321
6322static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6323 .prefix = XATTR_SECURITY_PREFIX,
6324 .list = nfs4_xattr_list_nfs4_label,
6325 .get = nfs4_xattr_get_nfs4_label,
6326 .set = nfs4_xattr_set_nfs4_label,
6327};
6328#endif
6329
6330
533eb461
AA		 6331/*
6332 * nfs_fhget will use either the mounted_on_fileid or the fileid
6333 */
69aaaae1
TM		 6334static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6335{
533eb461
AA		 6336 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6337 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6338 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6339 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6340 return;
6341
6342 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6343 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6344 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6345 fattr->nlink = 2;
6346}
6347
f05d147f
BS		 6348static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6349 const struct qstr *name,
6350 struct nfs4_fs_locations *fs_locations,
6351 struct page *page)
683b57b4
TM		 6352{
6353 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6354 u32 bitmask[3] = {
361e624f 6355 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6356 };
6357 struct nfs4_fs_locations_arg args = {
6358 .dir_fh = NFS_FH(dir),
c228fd3a 6359 .name = name,
683b57b4
TM		 6360 .page = page,
6361 .bitmask = bitmask,
6362 };
22958463
BH		 6363 struct nfs4_fs_locations_res res = {
6364 .fs_locations = fs_locations,
6365 };
683b57b4
TM		 6366 struct rpc_message msg = {
6367 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6368 .rpc_argp = &args,
22958463 6369 .rpc_resp = &res,
683b57b4
TM		 6370 };
6371 int status;
6372
3110ff80 6373 dprintk("%s: start\n", __func__);
533eb461
AA		 6374
6375 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6376 * is not supported */
6377 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6378 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6379 else
6380 bitmask[0] |= FATTR4_WORD0_FILEID;
6381
c228fd3a 6382 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6383 fs_locations->server = server;
830b8e33 6384 fs_locations->nlocations = 0;
f05d147f 6385 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6386 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6387 return status;
6388}
6389
f05d147f
BS		 6390int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6391 const struct qstr *name,
6392 struct nfs4_fs_locations *fs_locations,
6393 struct page *page)
db0a9593
BS		 6394{
6395 struct nfs4_exception exception = { };
6396 int err;
6397 do {
078ea3df
TM		 6398 err = _nfs4_proc_fs_locations(client, dir, name,
6399 fs_locations, page);
6400 trace_nfs4_get_fs_locations(dir, name, err);
6401 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6402 &exception);
6403 } while (exception.retry);
6404 return err;
6405}
6406
b03d735b
CL		 6407/*
6408 * This operation also signals the server that this client is
6409 * performing migration recovery. The server can stop returning
6410 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6411 * appended to this compound to identify the client ID which is
6412 * performing recovery.
6413 */
6414static int _nfs40_proc_get_locations(struct inode *inode,
6415 struct nfs4_fs_locations *locations,
6416 struct page *page, struct rpc_cred *cred)
6417{
6418 struct nfs_server *server = NFS_SERVER(inode);
6419 struct rpc_clnt *clnt = server->client;
6420 u32 bitmask[2] = {
6421 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6422 };
6423 struct nfs4_fs_locations_arg args = {
6424 .clientid = server->nfs_client->cl_clientid,
6425 .fh = NFS_FH(inode),
6426 .page = page,
6427 .bitmask = bitmask,
6428 .migration = 1, /* skip LOOKUP */
6429 .renew = 1, /* append RENEW */
6430 };
6431 struct nfs4_fs_locations_res res = {
6432 .fs_locations = locations,
6433 .migration = 1,
6434 .renew = 1,
6435 };
6436 struct rpc_message msg = {
6437 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6438 .rpc_argp = &args,
6439 .rpc_resp = &res,
6440 .rpc_cred = cred,
6441 };
6442 unsigned long now = jiffies;
6443 int status;
6444
6445 nfs_fattr_init(&locations->fattr);
6446 locations->server = server;
6447 locations->nlocations = 0;
6448
6449 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6450 nfs4_set_sequence_privileged(&args.seq_args);
6451 status = nfs4_call_sync_sequence(clnt, server, &msg,
6452 &args.seq_args, &res.seq_res);
6453 if (status)
6454 return status;
6455
6456 renew_lease(server, now);
6457 return 0;
6458}
6459
6460#ifdef CONFIG_NFS_V4_1
6461
6462/*
6463 * This operation also signals the server that this client is
6464 * performing migration recovery. The server can stop asserting
6465 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6466 * performing this operation is identified in the SEQUENCE
6467 * operation in this compound.
6468 *
6469 * When the client supports GETATTR(fs_locations_info), it can
6470 * be plumbed in here.
6471 */
6472static int _nfs41_proc_get_locations(struct inode *inode,
6473 struct nfs4_fs_locations *locations,
6474 struct page *page, struct rpc_cred *cred)
6475{
6476 struct nfs_server *server = NFS_SERVER(inode);
6477 struct rpc_clnt *clnt = server->client;
6478 u32 bitmask[2] = {
6479 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6480 };
6481 struct nfs4_fs_locations_arg args = {
6482 .fh = NFS_FH(inode),
6483 .page = page,
6484 .bitmask = bitmask,
6485 .migration = 1, /* skip LOOKUP */
6486 };
6487 struct nfs4_fs_locations_res res = {
6488 .fs_locations = locations,
6489 .migration = 1,
6490 };
6491 struct rpc_message msg = {
6492 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6493 .rpc_argp = &args,
6494 .rpc_resp = &res,
6495 .rpc_cred = cred,
6496 };
6497 int status;
6498
6499 nfs_fattr_init(&locations->fattr);
6500 locations->server = server;
6501 locations->nlocations = 0;
6502
6503 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6504 nfs4_set_sequence_privileged(&args.seq_args);
6505 status = nfs4_call_sync_sequence(clnt, server, &msg,
6506 &args.seq_args, &res.seq_res);
6507 if (status == NFS4_OK &&
6508 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6509 status = -NFS4ERR_LEASE_MOVED;
6510 return status;
6511}
6512
6513#endif /* CONFIG_NFS_V4_1 */
6514
6515/**
6516 * nfs4_proc_get_locations - discover locations for a migrated FSID
6517 * @inode: inode on FSID that is migrating
6518 * @locations: result of query
6519 * @page: buffer
6520 * @cred: credential to use for this operation
6521 *
6522 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6523 * operation failed, or a negative errno if a local error occurred.
6524 *
6525 * On success, "locations" is filled in, but if the server has
6526 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6527 * asserted.
6528 *
6529 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6530 * from this client that require migration recovery.
6531 */
6532int nfs4_proc_get_locations(struct inode *inode,
6533 struct nfs4_fs_locations *locations,
6534 struct page *page, struct rpc_cred *cred)
6535{
6536 struct nfs_server *server = NFS_SERVER(inode);
6537 struct nfs_client *clp = server->nfs_client;
6538 const struct nfs4_mig_recovery_ops *ops =
6539 clp->cl_mvops->mig_recovery_ops;
6540 struct nfs4_exception exception = { };
6541 int status;
6542
6543 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6544 (unsigned long long)server->fsid.major,
6545 (unsigned long long)server->fsid.minor,
6546 clp->cl_hostname);
6547 nfs_display_fhandle(NFS_FH(inode), __func__);
6548
6549 do {
6550 status = ops->get_locations(inode, locations, page, cred);
6551 if (status != -NFS4ERR_DELAY)
6552 break;
6553 nfs4_handle_exception(server, status, &exception);
6554 } while (exception.retry);
6555 return status;
6556}
6557
44c99933
CL		 6558/*
6559 * This operation also signals the server that this client is
6560 * performing "lease moved" recovery. The server can stop
6561 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6562 * is appended to this compound to identify the client ID which is
6563 * performing recovery.
6564 */
6565static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6566{
6567 struct nfs_server *server = NFS_SERVER(inode);
6568 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6569 struct rpc_clnt *clnt = server->client;
6570 struct nfs4_fsid_present_arg args = {
6571 .fh = NFS_FH(inode),
6572 .clientid = clp->cl_clientid,
6573 .renew = 1, /* append RENEW */
6574 };
6575 struct nfs4_fsid_present_res res = {
6576 .renew = 1,
6577 };
6578 struct rpc_message msg = {
6579 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6580 .rpc_argp = &args,
6581 .rpc_resp = &res,
6582 .rpc_cred = cred,
6583 };
6584 unsigned long now = jiffies;
6585 int status;
6586
6587 res.fh = nfs_alloc_fhandle();
6588 if (res.fh == NULL)
6589 return -ENOMEM;
6590
6591 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6592 nfs4_set_sequence_privileged(&args.seq_args);
6593 status = nfs4_call_sync_sequence(clnt, server, &msg,
6594 &args.seq_args, &res.seq_res);
6595 nfs_free_fhandle(res.fh);
6596 if (status)
6597 return status;
6598
6599 do_renew_lease(clp, now);
6600 return 0;
6601}
6602
6603#ifdef CONFIG_NFS_V4_1
6604
6605/*
6606 * This operation also signals the server that this client is
6607 * performing "lease moved" recovery. The server can stop asserting
6608 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6609 * this operation is identified in the SEQUENCE operation in this
6610 * compound.
6611 */
6612static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6613{
6614 struct nfs_server *server = NFS_SERVER(inode);
6615 struct rpc_clnt *clnt = server->client;
6616 struct nfs4_fsid_present_arg args = {
6617 .fh = NFS_FH(inode),
6618 };
6619 struct nfs4_fsid_present_res res = {
6620 };
6621 struct rpc_message msg = {
6622 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6623 .rpc_argp = &args,
6624 .rpc_resp = &res,
6625 .rpc_cred = cred,
6626 };
6627 int status;
6628
6629 res.fh = nfs_alloc_fhandle();
6630 if (res.fh == NULL)
6631 return -ENOMEM;
6632
6633 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6634 nfs4_set_sequence_privileged(&args.seq_args);
6635 status = nfs4_call_sync_sequence(clnt, server, &msg,
6636 &args.seq_args, &res.seq_res);
6637 nfs_free_fhandle(res.fh);
6638 if (status == NFS4_OK &&
6639 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6640 status = -NFS4ERR_LEASE_MOVED;
6641 return status;
6642}
6643
6644#endif /* CONFIG_NFS_V4_1 */
6645
6646/**
6647 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6648 * @inode: inode on FSID to check
6649 * @cred: credential to use for this operation
6650 *
6651 * Server indicates whether the FSID is present, moved, or not
6652 * recognized. This operation is necessary to clear a LEASE_MOVED
6653 * condition for this client ID.
6654 *
6655 * Returns NFS4_OK if the FSID is present on this server,
6656 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6657 * NFS4ERR code if some error occurred on the server, or a
6658 * negative errno if a local failure occurred.
6659 */
6660int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6661{
6662 struct nfs_server *server = NFS_SERVER(inode);
6663 struct nfs_client *clp = server->nfs_client;
6664 const struct nfs4_mig_recovery_ops *ops =
6665 clp->cl_mvops->mig_recovery_ops;
6666 struct nfs4_exception exception = { };
6667 int status;
6668
6669 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6670 (unsigned long long)server->fsid.major,
6671 (unsigned long long)server->fsid.minor,
6672 clp->cl_hostname);
6673 nfs_display_fhandle(NFS_FH(inode), __func__);
6674
6675 do {
6676 status = ops->fsid_present(inode, cred);
6677 if (status != -NFS4ERR_DELAY)
6678 break;
6679 nfs4_handle_exception(server, status, &exception);
6680 } while (exception.retry);
6681 return status;
6682}
6683
5ec16a85 6684/**
a5250def
WAA		 6685 * If 'use_integrity' is true and the state managment nfs_client
6686 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6687 * and the machine credential as per RFC3530bis and RFC5661 Security
6688 * Considerations sections. Otherwise, just use the user cred with the
6689 * filesystem's rpc_client.
5ec16a85 6690 */
a5250def 6691static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6692{
6693 int status;
6694 struct nfs4_secinfo_arg args = {
6695 .dir_fh = NFS_FH(dir),
6696 .name = name,
6697 };
6698 struct nfs4_secinfo_res res = {
6699 .flavors = flavors,
6700 };
6701 struct rpc_message msg = {
6702 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6703 .rpc_argp = &args,
6704 .rpc_resp = &res,
6705 };
a5250def 6706 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6707 struct rpc_cred *cred = NULL;
a5250def
WAA		 6708
6709 if (use_integrity) {
6710 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6711 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6712 msg.rpc_cred = cred;
a5250def 6713 }
5a5ea0d4
BS		 6714
6715 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6716
6717 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6718 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6719
a5250def
WAA		 6720 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6721 &res.seq_res, 0);
5a5ea0d4 6722 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6723
7cb852df
WAA		 6724 if (cred)
6725 put_rpccred(cred);
a5250def 6726
5a5ea0d4
BS		 6727 return status;
6728}
6729
72de53ec
BS		 6730int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6731 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6732{
6733 struct nfs4_exception exception = { };
6734 int err;
6735 do {
a5250def
WAA		 6736 err = -NFS4ERR_WRONGSEC;
6737
6738 /* try to use integrity protection with machine cred */
6739 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6740 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6741
6742 /*
6743 * if unable to use integrity protection, or SECINFO with
6744 * integrity protection returns NFS4ERR_WRONGSEC (which is
6745 * disallowed by spec, but exists in deployed servers) use
6746 * the current filesystem's rpc_client and the user cred.
6747 */
6748 if (err == -NFS4ERR_WRONGSEC)
6749 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6750
078ea3df
TM		 6751 trace_nfs4_secinfo(dir, name, err);
6752 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6753 &exception);
6754 } while (exception.retry);
6755 return err;
6756}
6757
557134a3 6758#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6759/*
6760 * Check the exchange flags returned by the server for invalid flags, having
6761 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6762 * DS flags set.
6763 */
6764static int nfs4_check_cl_exchange_flags(u32 flags)
6765{
6766 if (flags & ~EXCHGID4_FLAG_MASK_R)
6767 goto out_inval;
6768 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6769 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6770 goto out_inval;
6771 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6772 goto out_inval;
6773 return NFS_OK;
6774out_inval:
6775 return -NFS4ERR_INVAL;
6776}
6777
78fe0f41 6778static bool
79d4e1f0
CL		 6779nfs41_same_server_scope(struct nfs41_server_scope *a,
6780 struct nfs41_server_scope *b)
78fe0f41
WAA		 6781{
6782 if (a->server_scope_sz == b->server_scope_sz &&
6783 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6784 return true;
6785
6786 return false;
6787}
6788
7c44f1ae
WAA		 6789/*
6790 * nfs4_proc_bind_conn_to_session()
6791 *
6792 * The 4.1 client currently uses the same TCP connection for the
6793 * fore and backchannel.
6794 */
2cf047c9 6795int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6796{
6797 int status;
71a097c6
TM		 6798 struct nfs41_bind_conn_to_session_args args = {
6799 .client = clp,
6800 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6801 };
7c44f1ae
WAA		 6802 struct nfs41_bind_conn_to_session_res res;
6803 struct rpc_message msg = {
6804 .rpc_proc =
6805 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 6806 .rpc_argp = &args,
7c44f1ae 6807 .rpc_resp = &res,
2cf047c9 6808 .rpc_cred = cred,
7c44f1ae
WAA		 6809 };
6810
6811 dprintk("--> %s\n", __func__);
7c44f1ae 6812
71a097c6
TM		 6813 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6814 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6815 args.dir = NFS4_CDFC4_FORE;
7c44f1ae
WAA		 6816
6817 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6818 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 6819 if (status == 0) {
71a097c6 6820 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 6821 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6822 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6823 status = -EIO;
71a097c6 6824 goto out;
7c44f1ae 6825 }
71a097c6 6826 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 6827 dprintk("NFS: %s: Unexpected direction from server\n",
6828 __func__);
6829 status = -EIO;
71a097c6 6830 goto out;
7c44f1ae 6831 }
71a097c6 6832 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 6833 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6834 __func__);
6835 status = -EIO;
71a097c6 6836 goto out;
7c44f1ae
WAA		 6837 }
6838 }
7c44f1ae
WAA		 6839out:
6840 dprintk("<-- %s status= %d\n", __func__, status);
6841 return status;
6842}
6843
99fe60d0 6844/*
fa940720
WAA		 6845 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6846 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6847 */
6848static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6849 .how = SP4_MACH_CRED,
6850 .enforce.u.words = {
6851 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6852 1 << (OP_EXCHANGE_ID - 32) |
6853 1 << (OP_CREATE_SESSION - 32) |
6854 1 << (OP_DESTROY_SESSION - 32) |
6855 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6856 },
6857 .allow.u.words = {
6858 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6859 1 << (OP_LOCKU) |
6860 1 << (OP_COMMIT),
8b5bee2e 6861 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6862 1 << (OP_SECINFO_NO_NAME - 32) |
6863 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6864 1 << (OP_FREE_STATEID - 32) |
6865 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6866 }
6867};
6868
6869/*
6870 * Select the state protection mode for client `clp' given the server results
6871 * from exchange_id in `sp'.
99fe60d0 6872 *
2031cd1a
WAA		 6873 * Returns 0 on success, negative errno otherwise.
6874 */
6875static int nfs4_sp4_select_mode(struct nfs_client *clp,
6876 struct nfs41_state_protection *sp)
6877{
6878 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6879 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6880 1 << (OP_EXCHANGE_ID - 32) |
6881 1 << (OP_CREATE_SESSION - 32) |
6882 1 << (OP_DESTROY_SESSION - 32) |
6883 1 << (OP_DESTROY_CLIENTID - 32)
6884 };
6885 unsigned int i;
6886
6887 if (sp->how == SP4_MACH_CRED) {
6888 /* Print state protect result */
6889 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6890 for (i = 0; i <= LAST_NFS4_OP; i++) {
6891 if (test_bit(i, sp->enforce.u.longs))
6892 dfprintk(MOUNT, " enforce op %d\n", i);
6893 if (test_bit(i, sp->allow.u.longs))
6894 dfprintk(MOUNT, " allow op %d\n", i);
6895 }
6896
6897 /* make sure nothing is on enforce list that isn't supported */
6898 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6899 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6900 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6901 return -EINVAL;
6902 }
6903 }
6904
6905 /*
6906 * Minimal mode - state operations are allowed to use machine
6907 * credential. Note this already happens by default, so the
6908 * client doesn't have to do anything more than the negotiation.
6909 *
6910 * NOTE: we don't care if EXCHANGE_ID is in the list -
6911 * we're already using the machine cred for exchange_id
6912 * and will never use a different cred.
6913 */
6914 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6915 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6916 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6917 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6918 dfprintk(MOUNT, "sp4_mach_cred:\n");
6919 dfprintk(MOUNT, " minimal mode enabled\n");
6920 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6921 } else {
6922 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6923 return -EINVAL;
6924 }
fa940720
WAA		 6925
6926 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6927 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6928 dfprintk(MOUNT, " cleanup mode enabled\n");
6929 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6930 }
8b5bee2e
WAA		 6931
6932 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6933 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6934 dfprintk(MOUNT, " secinfo mode enabled\n");
6935 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6936 }
3787d506
WAA		 6937
6938 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6939 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6940 dfprintk(MOUNT, " stateid mode enabled\n");
6941 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6942 }
8c21c62c
WAA		 6943
6944 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6945 dfprintk(MOUNT, " write mode enabled\n");
6946 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6947 }
6948
6949 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6950 dfprintk(MOUNT, " commit mode enabled\n");
6951 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6952 }
2031cd1a
WAA		 6953 }
6954
6955 return 0;
6956}
6957
6958/*
6959 * _nfs4_proc_exchange_id()
6bbb4ae8 6960 *
2031cd1a 6961 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6962 */
2031cd1a
WAA		 6963static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6964 u32 sp4_how)
99fe60d0
BH		 6965{
6966 nfs4_verifier verifier;
6967 struct nfs41_exchange_id_args args = {
cd93710e 6968 .verifier = &verifier,
99fe60d0 6969 .client = clp,
cd3fadec 6970#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6971 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6972 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6973 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6974#else
6975 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6976 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6977#endif
99fe60d0
BH		 6978 };
6979 struct nfs41_exchange_id_res res = {
32b01310 6980 0
99fe60d0
BH		 6981 };
6982 int status;
6983 struct rpc_message msg = {
6984 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6985 .rpc_argp = &args,
6986 .rpc_resp = &res,
6987 .rpc_cred = cred,
6988 };
99fe60d0 6989
f092075d 6990 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 6991
6992 status = nfs4_init_uniform_client_string(clp);
6993 if (status)
3a6bb738 6994 goto out;
3a6bb738
JL		 6995
6996 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6bbb4ae8 6997 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 6998 clp->cl_owner_id);
99fe60d0 6999
acdeb69d 7000 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 7001 GFP_NOFS);
acdeb69d 7002 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 7003 status = -ENOMEM;
7004 goto out;
7005 }
78fe0f41 7006
79d4e1f0 7007 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 7008 GFP_NOFS);
177313f1 7009 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 7010 status = -ENOMEM;
acdeb69d 7011 goto out_server_owner;
abe9a6d5 7012 }
78fe0f41 7013
bbafffd2 7014 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 7015 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 7016 status = -ENOMEM;
7017 goto out_server_scope;
7018 }
7019
2031cd1a
WAA		 7020 switch (sp4_how) {
7021 case SP4_NONE:
7022 args.state_protect.how = SP4_NONE;
7023 break;
7024
7025 case SP4_MACH_CRED:
7026 args.state_protect = nfs4_sp4_mach_cred_request;
7027 break;
7028
7029 default:
7030 /* unsupported! */
7031 WARN_ON_ONCE(1);
7032 status = -EINVAL;
6b55970b 7033 goto out_impl_id;
2031cd1a
WAA		 7034 }
7035
1bd714f2 7036 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7037 trace_nfs4_exchange_id(clp, status);
177313f1 7038 if (status == 0)
32b01310 7039 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 7040
2031cd1a
WAA		 7041 if (status == 0)
7042 status = nfs4_sp4_select_mode(clp, &res.state_protect);
7043
acdeb69d 7044 if (status == 0) {
32b01310 7045 clp->cl_clientid = res.clientid;
e11259f9
TM		 7046 clp->cl_exchange_flags = res.flags;
7047 /* Client ID is not confirmed */
7048 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7049 clear_bit(NFS4_SESSION_ESTABLISHED,
7050 &clp->cl_session->session_state);
32b01310 7051 clp->cl_seqid = res.seqid;
e11259f9 7052 }
32b01310 7053
acdeb69d
CL		 7054 kfree(clp->cl_serverowner);
7055 clp->cl_serverowner = res.server_owner;
7056 res.server_owner = NULL;
78fe0f41 7057
7d2ed9ac 7058 /* use the most recent implementation id */
59155546
CL		 7059 kfree(clp->cl_implid);
7060 clp->cl_implid = res.impl_id;
6b55970b 7061 res.impl_id = NULL;
7d2ed9ac 7062
177313f1 7063 if (clp->cl_serverscope != NULL &&
79d4e1f0 7064 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 7065 res.server_scope)) {
7066 dprintk("%s: server_scope mismatch detected\n",
7067 __func__);
7068 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 7069 kfree(clp->cl_serverscope);
7070 clp->cl_serverscope = NULL;
78fe0f41
WAA		 7071 }
7072
177313f1 7073 if (clp->cl_serverscope == NULL) {
79d4e1f0 7074 clp->cl_serverscope = res.server_scope;
6b55970b 7075 res.server_scope = NULL;
abe9a6d5 7076 }
6b55970b 7077 }
7d2ed9ac 7078
6b55970b
KM		 7079out_impl_id:
7080 kfree(res.impl_id);
7d2ed9ac 7081out_server_scope:
abe9a6d5 7082 kfree(res.server_scope);
6b55970b
KM		 7083out_server_owner:
7084 kfree(res.server_owner);
abe9a6d5 7085out:
177313f1 7086 if (clp->cl_implid != NULL)
6bbb4ae8 7087 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 7088 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 7089 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 7090 clp->cl_implid->date.seconds,
7091 clp->cl_implid->date.nseconds);
6bbb4ae8 7092 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 7093 return status;
7094}
7095
2031cd1a
WAA		 7096/*
7097 * nfs4_proc_exchange_id()
7098 *
7099 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7100 *
7101 * Since the clientid has expired, all compounds using sessions
7102 * associated with the stale clientid will be returning
7103 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7104 * be in some phase of session reset.
7105 *
7106 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7107 */
7108int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7109{
7110 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7111 int status;
7112
7113 /* try SP4_MACH_CRED if krb5i/p */
7114 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7115 authflavor == RPC_AUTH_GSS_KRB5P) {
7116 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
7117 if (!status)
7118 return 0;
7119 }
7120
7121 /* try SP4_NONE */
7122 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
7123}
7124
66245539
TM		 7125static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7126 struct rpc_cred *cred)
7127{
7128 struct rpc_message msg = {
7129 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7130 .rpc_argp = clp,
7131 .rpc_cred = cred,
7132 };
7133 int status;
7134
7135 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7136 trace_nfs4_destroy_clientid(clp, status);
66245539 7137 if (status)
02c67525 7138 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7139 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7140 return status;
7141}
7142
7143static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7144 struct rpc_cred *cred)
7145{
7146 unsigned int loop;
7147 int ret;
7148
7149 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7150 ret = _nfs4_proc_destroy_clientid(clp, cred);
7151 switch (ret) {
7152 case -NFS4ERR_DELAY:
7153 case -NFS4ERR_CLIENTID_BUSY:
7154 ssleep(1);
7155 break;
7156 default:
7157 return ret;
7158 }
7159 }
7160 return 0;
7161}
7162
7163int nfs4_destroy_clientid(struct nfs_client *clp)
7164{
7165 struct rpc_cred *cred;
7166 int ret = 0;
7167
7168 if (clp->cl_mvops->minor_version < 1)
7169 goto out;
7170 if (clp->cl_exchange_flags == 0)
7171 goto out;
05f4c350
CL		 7172 if (clp->cl_preserve_clid)
7173 goto out;
73d8bde5 7174 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7175 ret = nfs4_proc_destroy_clientid(clp, cred);
7176 if (cred)
7177 put_rpccred(cred);
7178 switch (ret) {
7179 case 0:
7180 case -NFS4ERR_STALE_CLIENTID:
7181 clp->cl_exchange_flags = 0;
7182 }
7183out:
7184 return ret;
7185}
7186
2050f0cc
AA		 7187struct nfs4_get_lease_time_data {
7188 struct nfs4_get_lease_time_args *args;
7189 struct nfs4_get_lease_time_res *res;
7190 struct nfs_client *clp;
7191};
7192
7193static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7194 void *calldata)
7195{
2050f0cc
AA		 7196 struct nfs4_get_lease_time_data *data =
7197 (struct nfs4_get_lease_time_data *)calldata;
7198
7199 dprintk("--> %s\n", __func__);
7200 /* just setup sequence, do not trigger session recovery
7201 since we're invoked within one */
d9afbd1b
TM		 7202 nfs41_setup_sequence(data->clp->cl_session,
7203 &data->args->la_seq_args,
7204 &data->res->lr_seq_res,
7205 task);
2050f0cc
AA		 7206 dprintk("<-- %s\n", __func__);
7207}
7208
7209/*
7210 * Called from nfs4_state_manager thread for session setup, so don't recover
7211 * from sequence operation or clientid errors.
7212 */
7213static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7214{
7215 struct nfs4_get_lease_time_data *data =
7216 (struct nfs4_get_lease_time_data *)calldata;
7217
7218 dprintk("--> %s\n", __func__);
14516c3a
TM		 7219 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7220 return;
2050f0cc
AA		 7221 switch (task->tk_status) {
7222 case -NFS4ERR_DELAY:
7223 case -NFS4ERR_GRACE:
7224 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7225 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7226 task->tk_status = 0;
a8a4ae3a
AA		 7227 /* fall through */
7228 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7229 rpc_restart_call_prepare(task);
2050f0cc
AA		 7230 return;
7231 }
2050f0cc
AA		 7232 dprintk("<-- %s\n", __func__);
7233}
7234
17280175 7235static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7236 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7237 .rpc_call_done = nfs4_get_lease_time_done,
7238};
7239
7240int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7241{
7242 struct rpc_task *task;
7243 struct nfs4_get_lease_time_args args;
7244 struct nfs4_get_lease_time_res res = {
7245 .lr_fsinfo = fsinfo,
7246 };
7247 struct nfs4_get_lease_time_data data = {
7248 .args = &args,
7249 .res = &res,
7250 .clp = clp,
7251 };
7252 struct rpc_message msg = {
7253 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7254 .rpc_argp = &args,
7255 .rpc_resp = &res,
7256 };
7257 struct rpc_task_setup task_setup = {
7258 .rpc_client = clp->cl_rpcclient,
7259 .rpc_message = &msg,
7260 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7261 .callback_data = &data,
7262 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7263 };
7264 int status;
7265
a9c92d6b 7266 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7267 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7268 dprintk("--> %s\n", __func__);
7269 task = rpc_run_task(&task_setup);
7270
7271 if (IS_ERR(task))
7272 status = PTR_ERR(task);
7273 else {
7274 status = task->tk_status;
7275 rpc_put_task(task);
7276 }
7277 dprintk("<-- %s return %d\n", __func__, status);
7278
7279 return status;
7280}
7281
fc931582
AA		 7282/*
7283 * Initialize the values to be used by the client in CREATE_SESSION
7284 * If nfs4_init_session set the fore channel request and response sizes,
7285 * use them.
7286 *
7287 * Set the back channel max_resp_sz_cached to zero to force the client to
7288 * always set csa_cachethis to FALSE because the current implementation
7289 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7290 */
7291static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7292{
18aad3d5
AA		 7293 unsigned int max_rqst_sz, max_resp_sz;
7294
7295 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7296 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7297
fc931582 7298 /* Fore channel attributes */
18aad3d5
AA		 7299 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7300 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7301 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7302 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7303
7304 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7305 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7306 __func__,
7307 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7308 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7309
7310 /* Back channel attributes */
fc931582
AA		 7311 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7312 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7313 args->bc_attrs.max_resp_sz_cached = 0;
7314 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7315 args->bc_attrs.max_reqs = 1;
7316
7317 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7318 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7319 __func__,
7320 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7321 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7322 args->bc_attrs.max_reqs);
7323}
7324
79969dd1
TM		 7325static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7326 struct nfs41_create_session_res *res)
8d35301d 7327{
43c2e885 7328 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7329 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7330
43c2e885
BF		 7331 if (rcvd->max_resp_sz > sent->max_resp_sz)
7332 return -EINVAL;
7333 /*
7334 * Our requested max_ops is the minimum we need; we're not
7335 * prepared to break up compounds into smaller pieces than that.
7336 * So, no point even trying to continue if the server won't
7337 * cooperate:
7338 */
7339 if (rcvd->max_ops < sent->max_ops)
7340 return -EINVAL;
7341 if (rcvd->max_reqs == 0)
7342 return -EINVAL;
b4b9a0c1
VG		 7343 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7344 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7345 return 0;
8d35301d
AA		 7346}
7347
79969dd1
TM		 7348static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7349 struct nfs41_create_session_res *res)
43c2e885
BF		 7350{
7351 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7352 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7353
b1c0df5f
TM		 7354 if (!(res->flags & SESSION4_BACK_CHAN))
7355 goto out;
43c2e885
BF		 7356 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7357 return -EINVAL;
7358 if (rcvd->max_resp_sz < sent->max_resp_sz)
7359 return -EINVAL;
7360 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7361 return -EINVAL;
7362 /* These would render the backchannel useless: */
b4b9a0c1 7363 if (rcvd->max_ops != sent->max_ops)
43c2e885 7364 return -EINVAL;
b4b9a0c1 7365 if (rcvd->max_reqs != sent->max_reqs)
43c2e885 7366 return -EINVAL;
b1c0df5f 7367out:
43c2e885
BF		 7368 return 0;
7369}
8d35301d 7370
8d35301d 7371static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7372 struct nfs41_create_session_res *res)
8d35301d 7373{
43c2e885 7374 int ret;
8d35301d 7375
79969dd1 7376 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7377 if (ret)
7378 return ret;
79969dd1
TM		 7379 return nfs4_verify_back_channel_attrs(args, res);
7380}
7381
7382static void nfs4_update_session(struct nfs4_session *session,
7383 struct nfs41_create_session_res *res)
7384{
7385 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7386 /* Mark client id and session as being confirmed */
7387 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7388 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7389 session->flags = res->flags;
7390 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7391 if (res->flags & SESSION4_BACK_CHAN)
7392 memcpy(&session->bc_attrs, &res->bc_attrs,
7393 sizeof(session->bc_attrs));
8d35301d
AA		 7394}
7395
848f5bda
TM		 7396static int _nfs4_proc_create_session(struct nfs_client *clp,
7397 struct rpc_cred *cred)
fc931582
AA		 7398{
7399 struct nfs4_session *session = clp->cl_session;
7400 struct nfs41_create_session_args args = {
7401 .client = clp,
79969dd1
TM		 7402 .clientid = clp->cl_clientid,
7403 .seqid = clp->cl_seqid,
fc931582
AA		 7404 .cb_program = NFS4_CALLBACK,
7405 };
79969dd1
TM		 7406 struct nfs41_create_session_res res;
7407
fc931582
AA		 7408 struct rpc_message msg = {
7409 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7410 .rpc_argp = &args,
7411 .rpc_resp = &res,
848f5bda 7412 .rpc_cred = cred,
fc931582
AA		 7413 };
7414 int status;
7415
7416 nfs4_init_channel_attrs(&args);
0f91421e 7417 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7418
1bd714f2 7419 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7420 trace_nfs4_create_session(clp, status);
fc931582 7421
43095d39 7422 if (!status) {
8d35301d 7423 /* Verify the session's negotiated channel_attrs values */
79969dd1 7424 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7425 /* Increment the clientid slot sequence id */
79969dd1
TM		 7426 if (clp->cl_seqid == res.seqid)
7427 clp->cl_seqid++;
7428 if (status)
7429 goto out;
7430 nfs4_update_session(session, &res);
fc931582 7431 }
79969dd1 7432out:
fc931582
AA		 7433 return status;
7434}
7435
7436/*
7437 * Issues a CREATE_SESSION operation to the server.
7438 * It is the responsibility of the caller to verify the session is
7439 * expired before calling this routine.
7440 */
848f5bda 7441int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7442{
7443 int status;
7444 unsigned *ptr;
fc931582
AA		 7445 struct nfs4_session *session = clp->cl_session;
7446
7447 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7448
848f5bda 7449 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7450 if (status)
7451 goto out;
7452
aacd5537
AA		 7453 /* Init or reset the session slot tables */
7454 status = nfs4_setup_session_slot_tables(session);
7455 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7456 if (status)
7457 goto out;
7458
7459 ptr = (unsigned *)&session->sess_id.data[0];
7460 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7461 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7462out:
7463 dprintk("<-- %s\n", __func__);
7464 return status;
7465}
7466
0f3e66c6
AA		 7467/*
7468 * Issue the over-the-wire RPC DESTROY_SESSION.
7469 * The caller must serialize access to this routine.
7470 */
848f5bda
TM		 7471int nfs4_proc_destroy_session(struct nfs4_session *session,
7472 struct rpc_cred *cred)
0f3e66c6 7473{
848f5bda
TM		 7474 struct rpc_message msg = {
7475 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7476 .rpc_argp = session,
7477 .rpc_cred = cred,
7478 };
0f3e66c6 7479 int status = 0;
0f3e66c6
AA		 7480
7481 dprintk("--> nfs4_proc_destroy_session\n");
7482
7483 /* session is still being setup */
e11259f9
TM		 7484 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7485 return 0;
0f3e66c6 7486
1bd714f2 7487 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7488 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7489
7490 if (status)
08106ac7 7491 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7492 "Session has been destroyed regardless...\n", status);
7493
7494 dprintk("<-- nfs4_proc_destroy_session\n");
7495 return status;
7496}
7497
fc01cea9
AA		 7498/*
7499 * Renew the cl_session lease.
7500 */
d5f8d3fe
TM		 7501struct nfs4_sequence_data {
7502 struct nfs_client *clp;
7503 struct nfs4_sequence_args args;
7504 struct nfs4_sequence_res res;
7505};
7506
dc96aef9
AB		 7507static void nfs41_sequence_release(void *data)
7508{
d5f8d3fe
TM		 7509 struct nfs4_sequence_data *calldata = data;
7510 struct nfs_client *clp = calldata->clp;
dc96aef9 7511
7135840f
AB		 7512 if (atomic_read(&clp->cl_count) > 1)
7513 nfs4_schedule_state_renewal(clp);
7514 nfs_put_client(clp);
d5f8d3fe 7515 kfree(calldata);
dc96aef9
AB		 7516}
7517
aa5190d0
TM		 7518static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7519{
7520 switch(task->tk_status) {
7521 case -NFS4ERR_DELAY:
aa5190d0
TM		 7522 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7523 return -EAGAIN;
7524 default:
0400a6b0 7525 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7526 }
7527 return 0;
7528}
7529
dc96aef9 7530static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7531{
d5f8d3fe
TM		 7532 struct nfs4_sequence_data *calldata = data;
7533 struct nfs_client *clp = calldata->clp;
fc01cea9 7534
14516c3a
TM		 7535 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7536 return;
fc01cea9 7537
c6d01c6f 7538 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7539 if (task->tk_status < 0) {
7540 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7541 if (atomic_read(&clp->cl_count) == 1)
7542 goto out;
fc01cea9 7543
aa5190d0
TM		 7544 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7545 rpc_restart_call_prepare(task);
fc01cea9
AA		 7546 return;
7547 }
7548 }
fc01cea9 7549 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7550out:
fc01cea9
AA		 7551 dprintk("<-- %s\n", __func__);
7552}
7553
7554static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7555{
d5f8d3fe
TM		 7556 struct nfs4_sequence_data *calldata = data;
7557 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7558 struct nfs4_sequence_args *args;
7559 struct nfs4_sequence_res *res;
7560
fc01cea9
AA		 7561 args = task->tk_msg.rpc_argp;
7562 res = task->tk_msg.rpc_resp;
7563
d9afbd1b 7564 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7565}
7566
7567static const struct rpc_call_ops nfs41_sequence_ops = {
7568 .rpc_call_done = nfs41_sequence_call_done,
7569 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7570 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7571};
7572
8fe72bac
TM		 7573static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7574 struct rpc_cred *cred,
7575 bool is_privileged)
fc01cea9 7576{
d5f8d3fe 7577 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7578 struct rpc_message msg = {
7579 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7580 .rpc_cred = cred,
7581 };
71ac6da9
TM		 7582 struct rpc_task_setup task_setup_data = {
7583 .rpc_client = clp->cl_rpcclient,
7584 .rpc_message = &msg,
8fe72bac 7585 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7586 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7587 };
fc01cea9 7588
7135840f 7589 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7590 return ERR_PTR(-EIO);
dfb4f309 7591 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7592 if (calldata == NULL) {
7135840f 7593 nfs_put_client(clp);
71ac6da9 7594 return ERR_PTR(-ENOMEM);
fc01cea9 7595 }
a9c92d6b 7596 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7597 if (is_privileged)
7598 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7599 msg.rpc_argp = &calldata->args;
7600 msg.rpc_resp = &calldata->res;
7601 calldata->clp = clp;
71ac6da9 7602 task_setup_data.callback_data = calldata;
fc01cea9 7603
71ac6da9
TM		 7604 return rpc_run_task(&task_setup_data);
7605}
7606
2f60ea6b 7607static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7608{
7609 struct rpc_task *task;
7610 int ret = 0;
7611
2f60ea6b 7612 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7613 return -EAGAIN;
8fe72bac 7614 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7615 if (IS_ERR(task))
7616 ret = PTR_ERR(task);
7617 else
bf294b41 7618 rpc_put_task_async(task);
71ac6da9
TM		 7619 dprintk("<-- %s status=%d\n", __func__, ret);
7620 return ret;
7621}
7622
7623static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7624{
7625 struct rpc_task *task;
7626 int ret;
7627
8fe72bac 7628 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7629 if (IS_ERR(task)) {
7630 ret = PTR_ERR(task);
7631 goto out;
7632 }
7633 ret = rpc_wait_for_completion_task(task);
be824167 7634 if (!ret)
71ac6da9
TM		 7635 ret = task->tk_status;
7636 rpc_put_task(task);
7637out:
7638 dprintk("<-- %s status=%d\n", __func__, ret);
7639 return ret;
fc01cea9
AA		 7640}
7641
fce5c838
RL		 7642struct nfs4_reclaim_complete_data {
7643 struct nfs_client *clp;
7644 struct nfs41_reclaim_complete_args arg;
7645 struct nfs41_reclaim_complete_res res;
7646};
7647
7648static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7649{
7650 struct nfs4_reclaim_complete_data *calldata = data;
7651
d9afbd1b
TM		 7652 nfs41_setup_sequence(calldata->clp->cl_session,
7653 &calldata->arg.seq_args,
7654 &calldata->res.seq_res,
7655 task);
fce5c838
RL		 7656}
7657
aa5190d0
TM		 7658static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7659{
7660 switch(task->tk_status) {
7661 case 0:
7662 case -NFS4ERR_COMPLETE_ALREADY:
7663 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7664 break;
7665 case -NFS4ERR_DELAY:
aa5190d0 7666 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7667 /* fall through */
7668 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7669 return -EAGAIN;
7670 default:
0400a6b0 7671 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7672 }
7673 return 0;
7674}
7675
fce5c838
RL		 7676static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7677{
7678 struct nfs4_reclaim_complete_data *calldata = data;
7679 struct nfs_client *clp = calldata->clp;
7680 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7681
7682 dprintk("--> %s\n", __func__);
14516c3a
TM		 7683 if (!nfs41_sequence_done(task, res))
7684 return;
fce5c838 7685
c6d01c6f 7686 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7687 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7688 rpc_restart_call_prepare(task);
7689 return;
7690 }
fce5c838
RL		 7691 dprintk("<-- %s\n", __func__);
7692}
7693
7694static void nfs4_free_reclaim_complete_data(void *data)
7695{
7696 struct nfs4_reclaim_complete_data *calldata = data;
7697
7698 kfree(calldata);
7699}
7700
7701static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7702 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7703 .rpc_call_done = nfs4_reclaim_complete_done,
7704 .rpc_release = nfs4_free_reclaim_complete_data,
7705};
7706
7707/*
7708 * Issue a global reclaim complete.
7709 */
965e9c23
TM		 7710static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7711 struct rpc_cred *cred)
fce5c838
RL		 7712{
7713 struct nfs4_reclaim_complete_data *calldata;
7714 struct rpc_task *task;
7715 struct rpc_message msg = {
7716 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7717 .rpc_cred = cred,
fce5c838
RL		 7718 };
7719 struct rpc_task_setup task_setup_data = {
7720 .rpc_client = clp->cl_rpcclient,
7721 .rpc_message = &msg,
7722 .callback_ops = &nfs4_reclaim_complete_call_ops,
7723 .flags = RPC_TASK_ASYNC,
7724 };
7725 int status = -ENOMEM;
7726
7727 dprintk("--> %s\n", __func__);
8535b2be 7728 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7729 if (calldata == NULL)
7730 goto out;
7731 calldata->clp = clp;
7732 calldata->arg.one_fs = 0;
fce5c838 7733
a9c92d6b 7734 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7735 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7736 msg.rpc_argp = &calldata->arg;
7737 msg.rpc_resp = &calldata->res;
7738 task_setup_data.callback_data = calldata;
7739 task = rpc_run_task(&task_setup_data);
acf82b85 7740 if (IS_ERR(task)) {
fce5c838 7741 status = PTR_ERR(task);
acf82b85
DC		 7742 goto out;
7743 }
c34c32ea
AA		 7744 status = nfs4_wait_for_completion_rpc_task(task);
7745 if (status == 0)
7746 status = task->tk_status;
fce5c838 7747 rpc_put_task(task);
acf82b85 7748 return 0;
fce5c838
RL		 7749out:
7750 dprintk("<-- %s status=%d\n", __func__, status);
7751 return status;
7752}
b1f69b75
AA		 7753
7754static void
7755nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7756{
7757 struct nfs4_layoutget *lgp = calldata;
c31663d4 7758 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7759 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7760
7761 dprintk("--> %s\n", __func__);
c31663d4
FI		 7762 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7763 * right now covering the LAYOUTGET we are about to send.
7764 * However, that is not so catastrophic, and there seems
7765 * to be no way to prevent it completely.
7766 */
6ba7db34 7767 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7768 &lgp->res.seq_res, task))
b1f69b75 7769 return;
cf7d63f1
FI		 7770 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7771 NFS_I(lgp->args.inode)->layout,
ce6ab4f2 7772 &lgp->args.range,
cf7d63f1
FI		 7773 lgp->args.ctx->state)) {
7774 rpc_exit(task, NFS4_OK);
cf7d63f1 7775 }
b1f69b75
AA		 7776}
7777
7778static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7779{
7780 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7781 struct inode *inode = lgp->args.inode;
7782 struct nfs_server *server = NFS_SERVER(inode);
7783 struct pnfs_layout_hdr *lo;
7784 struct nfs4_state *state = NULL;
ed7e5423 7785 unsigned long timeo, now, giveup;
b1f69b75 7786
ed7e5423 7787 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7788
6ba7db34 7789 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7790 goto out;
b1f69b75
AA		 7791
7792 switch (task->tk_status) {
7793 case 0:
ee314c2a 7794 goto out;
21b874c8
TM		 7795 /*
7796 * NFS4ERR_BADLAYOUT means the MDS cannot return a layout of
7797 * length lgp->args.minlength != 0 (see RFC5661 section 18.43.3).
7798 */
7799 case -NFS4ERR_BADLAYOUT:
7800 goto out_overflow;
ed7e5423
BH		 7801 /*
7802 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
21b874c8
TM		 7803 * (or clients) writing to the same RAID stripe except when
7804 * the minlength argument is 0 (see RFC5661 section 18.43.3).
ed7e5423 7805 */
b1f69b75 7806 case -NFS4ERR_LAYOUTTRYLATER:
21b874c8
TM		 7807 if (lgp->args.minlength == 0)
7808 goto out_overflow;
ed7e5423
BH		 7809 /*
7810 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7811 * existing layout before getting a new one).
7812 */
b1f69b75 7813 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7814 timeo = rpc_get_timeout(task->tk_client);
7815 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7816 now = jiffies;
7817 if (time_after(giveup, now)) {
7818 unsigned long delay;
7819
7820 /* Delay for:
7821 * - Not less then NFS4_POLL_RETRY_MIN.
7822 * - One last time a jiffie before we give up
7823 * - exponential backoff (time_now minus start_attempt)
7824 */
7825 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7826 min((giveup - now - 1),
7827 now - lgp->args.timestamp));
7828
7829 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7830 __func__, delay);
7831 rpc_delay(task, delay);
2259f960
TM		 7832 /* Do not call nfs4_async_handle_error() */
7833 goto out_restart;
ed7e5423 7834 }
ee314c2a
TM		 7835 break;
7836 case -NFS4ERR_EXPIRED:
7837 case -NFS4ERR_BAD_STATEID:
7838 spin_lock(&inode->i_lock);
2259f960
TM		 7839 if (nfs4_stateid_match(&lgp->args.stateid,
7840 &lgp->args.ctx->state->stateid)) {
ee314c2a
TM		 7841 spin_unlock(&inode->i_lock);
7842 /* If the open stateid was bad, then recover it. */
7843 state = lgp->args.ctx->state;
2259f960
TM		 7844 break;
7845 }
7846 lo = NFS_I(inode)->layout;
7847 if (lo && nfs4_stateid_match(&lgp->args.stateid,
7848 &lo->plh_stateid)) {
ee314c2a
TM		 7849 LIST_HEAD(head);
7850
defb8460
CH		 7851 /*
7852 * Mark the bad layout state as invalid, then retry
7853 * with the current stateid.
7854 */
8714d46d 7855 set_bit(NFS_LAYOUT_INVALID_STID, &lo->plh_flags);
ee314c2a
TM		 7856 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7857 spin_unlock(&inode->i_lock);
ee314c2a 7858 pnfs_free_lseg_list(&head);
2259f960
TM		 7859 } else
7860 spin_unlock(&inode->i_lock);
7861 goto out_restart;
b1f69b75 7862 }
91ab4b4d 7863 if (nfs4_async_handle_error(task, server, state, &lgp->timeout) == -EAGAIN)
2259f960 7864 goto out_restart;
ee314c2a 7865out:
b1f69b75 7866 dprintk("<-- %s\n", __func__);
21b874c8 7867 return;
2259f960
TM		 7868out_restart:
7869 task->tk_status = 0;
7870 rpc_restart_call_prepare(task);
7871 return;
21b874c8
TM		 7872out_overflow:
7873 task->tk_status = -EOVERFLOW;
7874 goto out;
b1f69b75
AA		 7875}
7876
8554116e
IK		 7877static size_t max_response_pages(struct nfs_server *server)
7878{
7879 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7880 return nfs_page_array_len(0, max_resp_sz);
7881}
7882
7883static void nfs4_free_pages(struct page **pages, size_t size)
7884{
7885 int i;
7886
7887 if (!pages)
7888 return;
7889
7890 for (i = 0; i < size; i++) {
7891 if (!pages[i])
7892 break;
7893 __free_page(pages[i]);
7894 }
7895 kfree(pages);
7896}
7897
7898static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7899{
7900 struct page **pages;
7901 int i;
7902
7903 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7904 if (!pages) {
7905 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7906 return NULL;
7907 }
7908
7909 for (i = 0; i < size; i++) {
7910 pages[i] = alloc_page(gfp_flags);
7911 if (!pages[i]) {
7912 dprintk("%s: failed to allocate page\n", __func__);
7913 nfs4_free_pages(pages, size);
7914 return NULL;
7915 }
7916 }
7917
7918 return pages;
7919}
7920
b1f69b75
AA		 7921static void nfs4_layoutget_release(void *calldata)
7922{
7923 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7924 struct inode *inode = lgp->args.inode;
7925 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7926 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7927
7928 dprintk("--> %s\n", __func__);
8554116e 7929 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7930 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7931 put_nfs_open_context(lgp->args.ctx);
7932 kfree(calldata);
7933 dprintk("<-- %s\n", __func__);
7934}
7935
7936static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7937 .rpc_call_prepare = nfs4_layoutget_prepare,
7938 .rpc_call_done = nfs4_layoutget_done,
7939 .rpc_release = nfs4_layoutget_release,
7940};
7941
a0b0a6e3
TM		 7942struct pnfs_layout_segment *
7943nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7944{
a47970ff
WAA		 7945 struct inode *inode = lgp->args.inode;
7946 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7947 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7948 struct rpc_task *task;
7949 struct rpc_message msg = {
7950 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7951 .rpc_argp = &lgp->args,
7952 .rpc_resp = &lgp->res,
6ab59344 7953 .rpc_cred = lgp->cred,
b1f69b75
AA		 7954 };
7955 struct rpc_task_setup task_setup_data = {
7956 .rpc_client = server->client,
7957 .rpc_message = &msg,
7958 .callback_ops = &nfs4_layoutget_call_ops,
7959 .callback_data = lgp,
7960 .flags = RPC_TASK_ASYNC,
7961 };
a0b0a6e3 7962 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7963 int status = 0;
7964
7965 dprintk("--> %s\n", __func__);
7966
4bd5a980
PT		 7967 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7968 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7969
8554116e
IK		 7970 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7971 if (!lgp->args.layout.pages) {
7972 nfs4_layoutget_release(lgp);
a0b0a6e3 7973 return ERR_PTR(-ENOMEM);
8554116e
IK		 7974 }
7975 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7976 lgp->args.timestamp = jiffies;
8554116e 7977
35124a09 7978 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7979 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7980 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 7981
b1f69b75
AA		 7982 task = rpc_run_task(&task_setup_data);
7983 if (IS_ERR(task))
a0b0a6e3 7984 return ERR_CAST(task);
b1f69b75 7985 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7986 if (status == 0)
7987 status = task->tk_status;
1037e6ea
TM		 7988 trace_nfs4_layoutget(lgp->args.ctx,
7989 &lgp->args.range,
7990 &lgp->res.range,
7991 status);
085b7a45
WAA		 7992 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7993 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7994 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7995 rpc_put_task(task);
7996 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7997 if (status)
7998 return ERR_PTR(status);
7999 return lseg;
b1f69b75
AA		 8000}
8001
cbe82603
BH		 8002static void
8003nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
8004{
8005 struct nfs4_layoutreturn *lrp = calldata;
8006
8007 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 8008 nfs41_setup_sequence(lrp->clp->cl_session,
8009 &lrp->args.seq_args,
8010 &lrp->res.seq_res,
8011 task);
cbe82603
BH		 8012}
8013
8014static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
8015{
8016 struct nfs4_layoutreturn *lrp = calldata;
8017 struct nfs_server *server;
8018
8019 dprintk("--> %s\n", __func__);
8020
6ba7db34 8021 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 8022 return;
8023
8024 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 8025 switch (task->tk_status) {
8026 default:
8027 task->tk_status = 0;
8028 case 0:
8029 break;
8030 case -NFS4ERR_DELAY:
8478eaa1 8031 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 8032 break;
d00c5d43 8033 rpc_restart_call_prepare(task);
cbe82603
BH		 8034 return;
8035 }
cbe82603
BH		 8036 dprintk("<-- %s\n", __func__);
8037}
8038
8039static void nfs4_layoutreturn_release(void *calldata)
8040{
8041 struct nfs4_layoutreturn *lrp = calldata;
849b286f 8042 struct pnfs_layout_hdr *lo = lrp->args.layout;
c5d73716 8043 LIST_HEAD(freeme);
cbe82603
BH		 8044
8045 dprintk("--> %s\n", __func__);
849b286f
TM		 8046 spin_lock(&lo->plh_inode->i_lock);
8047 if (lrp->res.lrs_present)
8048 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
c5d73716 8049 pnfs_mark_matching_lsegs_invalid(lo, &freeme, &lrp->args.range);
d67ae825 8050 pnfs_clear_layoutreturn_waitbit(lo);
849b286f
TM		 8051 lo->plh_block_lgets--;
8052 spin_unlock(&lo->plh_inode->i_lock);
c5d73716 8053 pnfs_free_lseg_list(&freeme);
70c3bd2b 8054 pnfs_put_layout_hdr(lrp->args.layout);
5a0ec8ac 8055 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 8056 kfree(calldata);
8057 dprintk("<-- %s\n", __func__);
8058}
8059
8060static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8061 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8062 .rpc_call_done = nfs4_layoutreturn_done,
8063 .rpc_release = nfs4_layoutreturn_release,
8064};
8065
6c16605d 8066int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 8067{
8068 struct rpc_task *task;
8069 struct rpc_message msg = {
8070 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8071 .rpc_argp = &lrp->args,
8072 .rpc_resp = &lrp->res,
9556000d 8073 .rpc_cred = lrp->cred,
cbe82603
BH		 8074 };
8075 struct rpc_task_setup task_setup_data = {
1771c577 8076 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8077 .rpc_message = &msg,
8078 .callback_ops = &nfs4_layoutreturn_call_ops,
8079 .callback_data = lrp,
8080 };
6c16605d 8081 int status = 0;
cbe82603
BH		 8082
8083 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8084 if (!sync) {
8085 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8086 if (!lrp->inode) {
8087 nfs4_layoutreturn_release(lrp);
8088 return -EAGAIN;
8089 }
8090 task_setup_data.flags |= RPC_TASK_ASYNC;
8091 }
a9c92d6b 8092 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8093 task = rpc_run_task(&task_setup_data);
8094 if (IS_ERR(task))
8095 return PTR_ERR(task);
5a0ec8ac
TM		 8096 if (sync)
8097 status = task->tk_status;
1037e6ea 8098 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 8099 dprintk("<-- %s status=%d\n", __func__, status);
8100 rpc_put_task(task);
8101 return status;
8102}
8103
b1f69b75 8104static int
cd5875fe
TM		 8105_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8106 struct pnfs_device *pdev,
8107 struct rpc_cred *cred)
b1f69b75
AA		 8108{
8109 struct nfs4_getdeviceinfo_args args = {
8110 .pdev = pdev,
4e590803
TM		 8111 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8112 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8113 };
8114 struct nfs4_getdeviceinfo_res res = {
8115 .pdev = pdev,
8116 };
8117 struct rpc_message msg = {
8118 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8119 .rpc_argp = &args,
8120 .rpc_resp = &res,
cd5875fe 8121 .rpc_cred = cred,
b1f69b75
AA		 8122 };
8123 int status;
8124
8125 dprintk("--> %s\n", __func__);
7c513058 8126 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8127 if (res.notification & ~args.notify_types)
8128 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8129 if (res.notification != args.notify_types)
8130 pdev->nocache = 1;
4e590803 8131
b1f69b75
AA		 8132 dprintk("<-- %s status=%d\n", __func__, status);
8133
8134 return status;
8135}
8136
cd5875fe
TM		 8137int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8138 struct pnfs_device *pdev,
8139 struct rpc_cred *cred)
b1f69b75
AA		 8140{
8141 struct nfs4_exception exception = { };
8142 int err;
8143
8144 do {
8145 err = nfs4_handle_exception(server,
cd5875fe 8146 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8147 &exception);
8148 } while (exception.retry);
8149 return err;
8150}
8151EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8152
863a3c6c
AA		 8153static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8154{
8155 struct nfs4_layoutcommit_data *data = calldata;
8156 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 8157 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 8158
d9afbd1b
TM		 8159 nfs41_setup_sequence(session,
8160 &data->args.seq_args,
8161 &data->res.seq_res,
8162 task);
863a3c6c
AA		 8163}
8164
8165static void
8166nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8167{
8168 struct nfs4_layoutcommit_data *data = calldata;
8169 struct nfs_server *server = NFS_SERVER(data->args.inode);
8170
6ba7db34 8171 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8172 return;
8173
8174 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8175 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8176 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8177 case -NFS4ERR_BADLAYOUT: /* no layout */
8178 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8179 task->tk_status = 0;
e59d27e0 8180 case 0:
e59d27e0
TM		 8181 break;
8182 default:
8478eaa1 8183 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8184 rpc_restart_call_prepare(task);
8185 return;
8186 }
8187 }
863a3c6c
AA		 8188}
8189
8190static void nfs4_layoutcommit_release(void *calldata)
8191{
8192 struct nfs4_layoutcommit_data *data = calldata;
8193
db29c089 8194 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8195 nfs_post_op_update_inode_force_wcc(data->args.inode,
8196 data->res.fattr);
863a3c6c 8197 put_rpccred(data->cred);
472e2594 8198 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8199 kfree(data);
8200}
8201
8202static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8203 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8204 .rpc_call_done = nfs4_layoutcommit_done,
8205 .rpc_release = nfs4_layoutcommit_release,
8206};
8207
8208int
ef311537 8209nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8210{
8211 struct rpc_message msg = {
8212 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8213 .rpc_argp = &data->args,
8214 .rpc_resp = &data->res,
8215 .rpc_cred = data->cred,
8216 };
8217 struct rpc_task_setup task_setup_data = {
8218 .task = &data->task,
8219 .rpc_client = NFS_CLIENT(data->args.inode),
8220 .rpc_message = &msg,
8221 .callback_ops = &nfs4_layoutcommit_ops,
8222 .callback_data = data,
863a3c6c
AA		 8223 };
8224 struct rpc_task *task;
8225 int status = 0;
8226
b4839ebe
KM		 8227 dprintk("NFS: initiating layoutcommit call. sync %d "
8228 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8229 data->args.lastbytewritten,
8230 data->args.inode->i_ino);
8231
472e2594
TM		 8232 if (!sync) {
8233 data->inode = nfs_igrab_and_active(data->args.inode);
8234 if (data->inode == NULL) {
8235 nfs4_layoutcommit_release(data);
8236 return -EAGAIN;
8237 }
8238 task_setup_data.flags = RPC_TASK_ASYNC;
8239 }
a9c92d6b 8240 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8241 task = rpc_run_task(&task_setup_data);
8242 if (IS_ERR(task))
8243 return PTR_ERR(task);
472e2594
TM		 8244 if (sync)
8245 status = task->tk_status;
1037e6ea 8246 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 8247 dprintk("%s: status %d\n", __func__, status);
8248 rpc_put_task(task);
8249 return status;
8250}
fca78d6d 8251
97431204
AA		 8252/**
8253 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8254 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8255 */
fca78d6d
BS		 8256static int
8257_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8258 struct nfs_fsinfo *info,
8259 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8260{
8261 struct nfs41_secinfo_no_name_args args = {
8262 .style = SECINFO_STYLE_CURRENT_FH,
8263 };
8264 struct nfs4_secinfo_res res = {
8265 .flavors = flavors,
8266 };
8267 struct rpc_message msg = {
8268 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8269 .rpc_argp = &args,
8270 .rpc_resp = &res,
8271 };
b1b3e136 8272 struct rpc_clnt *clnt = server->client;
7cb852df 8273 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8274 int status;
8275
8276 if (use_integrity) {
8277 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8278 cred = nfs4_get_clid_cred(server->nfs_client);
8279 msg.rpc_cred = cred;
b1b3e136
WAA		 8280 }
8281
8282 dprintk("--> %s\n", __func__);
8283 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8284 &res.seq_res, 0);
8285 dprintk("<-- %s status=%d\n", __func__, status);
8286
7cb852df
WAA		 8287 if (cred)
8288 put_rpccred(cred);
b1b3e136
WAA		 8289
8290 return status;
fca78d6d
BS		 8291}
8292
8293static int
8294nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8295 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8296{
8297 struct nfs4_exception exception = { };
8298 int err;
8299 do {
b1b3e136
WAA		 8300 /* first try using integrity protection */
8301 err = -NFS4ERR_WRONGSEC;
8302
8303 /* try to use integrity protection with machine cred */
8304 if (_nfs4_is_integrity_protected(server->nfs_client))
8305 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8306 flavors, true);
8307
8308 /*
8309 * if unable to use integrity protection, or SECINFO with
8310 * integrity protection returns NFS4ERR_WRONGSEC (which is
8311 * disallowed by spec, but exists in deployed servers) use
8312 * the current filesystem's rpc_client and the user cred.
8313 */
8314 if (err == -NFS4ERR_WRONGSEC)
8315 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8316 flavors, false);
8317
fca78d6d
BS		 8318 switch (err) {
8319 case 0:
8320 case -NFS4ERR_WRONGSEC:
78b19bae 8321 case -ENOTSUPP:
05e9cfb4 8322 goto out;
fca78d6d
BS		 8323 default:
8324 err = nfs4_handle_exception(server, err, &exception);
8325 }
8326 } while (exception.retry);
05e9cfb4 8327out:
fca78d6d
BS		 8328 return err;
8329}
8330
8331static int
8332nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8333 struct nfs_fsinfo *info)
8334{
8335 int err;
8336 struct page *page;
367156d9 8337 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8338 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8339 struct nfs4_secinfo4 *secinfo;
8340 int i;
fca78d6d
BS		 8341
8342 page = alloc_page(GFP_KERNEL);
8343 if (!page) {
8344 err = -ENOMEM;
8345 goto out;
8346 }
8347
8348 flavors = page_address(page);
8349 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8350
8351 /*
8352 * Fall back on "guess and check" method if
8353 * the server doesn't support SECINFO_NO_NAME
8354 */
78b19bae 8355 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8356 err = nfs4_find_root_sec(server, fhandle, info);
8357 goto out_freepage;
8358 }
8359 if (err)
8360 goto out_freepage;
8361
58a8cf12
WAA		 8362 for (i = 0; i < flavors->num_flavors; i++) {
8363 secinfo = &flavors->flavors[i];
8364
8365 switch (secinfo->flavor) {
8366 case RPC_AUTH_NULL:
8367 case RPC_AUTH_UNIX:
8368 case RPC_AUTH_GSS:
8369 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8370 &secinfo->flavor_info);
8371 break;
8372 default:
8373 flavor = RPC_AUTH_MAXFLAVOR;
8374 break;
8375 }
8376
4d4b69dd
WAA		 8377 if (!nfs_auth_info_match(&server->auth_info, flavor))
8378 flavor = RPC_AUTH_MAXFLAVOR;
8379
58a8cf12
WAA		 8380 if (flavor != RPC_AUTH_MAXFLAVOR) {
8381 err = nfs4_lookup_root_sec(server, fhandle,
8382 info, flavor);
8383 if (!err)
8384 break;
8385 }
8386 }
8387
8388 if (flavor == RPC_AUTH_MAXFLAVOR)
8389 err = -EPERM;
fca78d6d
BS		 8390
8391out_freepage:
8392 put_page(page);
8393 if (err == -EACCES)
8394 return -EPERM;
8395out:
8396 return err;
8397}
1cab0652 8398
ab7cb0df
TM		 8399static int _nfs41_test_stateid(struct nfs_server *server,
8400 nfs4_stateid *stateid,
8401 struct rpc_cred *cred)
7d974794
BS		 8402{
8403 int status;
8404 struct nfs41_test_stateid_args args = {
1cab0652 8405 .stateid = stateid,
7d974794
BS		 8406 };
8407 struct nfs41_test_stateid_res res;
8408 struct rpc_message msg = {
8409 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8410 .rpc_argp = &args,
8411 .rpc_resp = &res,
ab7cb0df 8412 .rpc_cred = cred,
7d974794 8413 };
3787d506
WAA		 8414 struct rpc_clnt *rpc_client = server->client;
8415
8416 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8417 &rpc_client, &msg);
1cab0652 8418
38527b15 8419 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8420 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8421 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8422 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8423 &args.seq_args, &res.seq_res);
38527b15
CL		 8424 if (status != NFS_OK) {
8425 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8426 return status;
38527b15
CL		 8427 }
8428 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8429 return -res.status;
7d974794
BS		 8430}
8431
38527b15
CL		 8432/**
8433 * nfs41_test_stateid - perform a TEST_STATEID operation
8434 *
8435 * @server: server / transport on which to perform the operation
8436 * @stateid: state ID to test
ab7cb0df 8437 * @cred: credential
38527b15
CL		 8438 *
8439 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8440 * Otherwise a negative NFS4ERR value is returned if the operation
8441 * failed or the state ID is not currently valid.
8442 */
ab7cb0df
TM		 8443static int nfs41_test_stateid(struct nfs_server *server,
8444 nfs4_stateid *stateid,
8445 struct rpc_cred *cred)
7d974794
BS		 8446{
8447 struct nfs4_exception exception = { };
8448 int err;
8449 do {
ab7cb0df 8450 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8451 if (err != -NFS4ERR_DELAY)
8452 break;
8453 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8454 } while (exception.retry);
8455 return err;
8456}
9aeda35f 8457
7c1d5fae
TM		 8458struct nfs_free_stateid_data {
8459 struct nfs_server *server;
8460 struct nfs41_free_stateid_args args;
9aeda35f 8461 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8462};
8463
8464static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8465{
8466 struct nfs_free_stateid_data *data = calldata;
8467 nfs41_setup_sequence(nfs4_get_session(data->server),
8468 &data->args.seq_args,
8469 &data->res.seq_res,
8470 task);
8471}
8472
8473static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8474{
8475 struct nfs_free_stateid_data *data = calldata;
8476
8477 nfs41_sequence_done(task, &data->res.seq_res);
8478
8479 switch (task->tk_status) {
8480 case -NFS4ERR_DELAY:
8478eaa1 8481 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8482 rpc_restart_call_prepare(task);
8483 }
8484}
8485
8486static void nfs41_free_stateid_release(void *calldata)
8487{
8488 kfree(calldata);
8489}
8490
17f26b12 8491static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8492 .rpc_call_prepare = nfs41_free_stateid_prepare,
8493 .rpc_call_done = nfs41_free_stateid_done,
8494 .rpc_release = nfs41_free_stateid_release,
8495};
8496
8497static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8498 nfs4_stateid *stateid,
ab7cb0df 8499 struct rpc_cred *cred,
7c1d5fae
TM		 8500 bool privileged)
8501{
9aeda35f
BS		 8502 struct rpc_message msg = {
8503 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8504 .rpc_cred = cred,
9aeda35f 8505 };
7c1d5fae
TM		 8506 struct rpc_task_setup task_setup = {
8507 .rpc_client = server->client,
8508 .rpc_message = &msg,
8509 .callback_ops = &nfs41_free_stateid_ops,
8510 .flags = RPC_TASK_ASYNC,
8511 };
8512 struct nfs_free_stateid_data *data;
9aeda35f 8513
3787d506
WAA		 8514 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8515 &task_setup.rpc_client, &msg);
8516
38527b15 8517 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8518 data = kmalloc(sizeof(*data), GFP_NOFS);
8519 if (!data)
8520 return ERR_PTR(-ENOMEM);
8521 data->server = server;
8522 nfs4_stateid_copy(&data->args.stateid, stateid);
8523
8524 task_setup.callback_data = data;
8525
8526 msg.rpc_argp = &data->args;
8527 msg.rpc_resp = &data->res;
a9c92d6b 8528 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8529 if (privileged)
8530 nfs4_set_sequence_privileged(&data->args.seq_args);
8531
8532 return rpc_run_task(&task_setup);
9aeda35f
BS		 8533}
8534
38527b15
CL		 8535/**
8536 * nfs41_free_stateid - perform a FREE_STATEID operation
8537 *
8538 * @server: server / transport on which to perform the operation
8539 * @stateid: state ID to release
ab7cb0df 8540 * @cred: credential
38527b15
CL		 8541 *
8542 * Returns NFS_OK if the server freed "stateid". Otherwise a
8543 * negative NFS4ERR value is returned.
8544 */
ab7cb0df
TM		 8545static int nfs41_free_stateid(struct nfs_server *server,
8546 nfs4_stateid *stateid,
8547 struct rpc_cred *cred)
9aeda35f 8548{
7c1d5fae
TM		 8549 struct rpc_task *task;
8550 int ret;
8551
ab7cb0df 8552 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8553 if (IS_ERR(task))
8554 return PTR_ERR(task);
8555 ret = rpc_wait_for_completion_task(task);
8556 if (!ret)
8557 ret = task->tk_status;
8558 rpc_put_task(task);
8559 return ret;
9aeda35f 8560}
36281caa 8561
f1cdae87
JL		 8562static void
8563nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8564{
8565 struct rpc_task *task;
ab7cb0df 8566 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8567
ab7cb0df 8568 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8569 nfs4_free_lock_state(server, lsp);
8570 if (IS_ERR(task))
f1cdae87 8571 return;
c8b2d0bf 8572 rpc_put_task(task);
c8b2d0bf
TM		 8573}
8574
36281caa
TM		 8575static bool nfs41_match_stateid(const nfs4_stateid *s1,
8576 const nfs4_stateid *s2)
8577{
2d2f24ad 8578 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8579 return false;
8580
2d2f24ad 8581 if (s1->seqid == s2->seqid)
36281caa 8582 return true;
2d2f24ad 8583 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8584 return true;
8585
8586 return false;
8587}
8588
557134a3
AA		 8589#endif /* CONFIG_NFS_V4_1 */
8590
36281caa
TM		 8591static bool nfs4_match_stateid(const nfs4_stateid *s1,
8592 const nfs4_stateid *s2)
8593{
f597c537 8594 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8595}
8596
8597
17280175 8598static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8599 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8600 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8601 .recover_open = nfs4_open_reclaim,
8602 .recover_lock = nfs4_lock_reclaim,
591d71cb 8603 .establish_clid = nfs4_init_clientid,
05f4c350 8604 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8605};
8606
591d71cb 8607#if defined(CONFIG_NFS_V4_1)
17280175 8608static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8609 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8610 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8611 .recover_open = nfs4_open_reclaim,
8612 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8613 .establish_clid = nfs41_init_clientid,
fce5c838 8614 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8615 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8616};
8617#endif /* CONFIG_NFS_V4_1 */
8618
17280175 8619static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8620 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8621 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8622 .recover_open = nfs40_open_expired,
591d71cb
AA		 8623 .recover_lock = nfs4_lock_expired,
8624 .establish_clid = nfs4_init_clientid,
8625};
8626
8627#if defined(CONFIG_NFS_V4_1)
17280175 8628static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8629 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8630 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8631 .recover_open = nfs41_open_expired,
8632 .recover_lock = nfs41_lock_expired,
4d643d1d 8633 .establish_clid = nfs41_init_clientid,
1da177e4 8634};
591d71cb 8635#endif /* CONFIG_NFS_V4_1 */
1da177e4 8636
17280175 8637static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8638 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8639 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8640 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8641};
8642
8643#if defined(CONFIG_NFS_V4_1)
17280175 8644static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8645 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8646 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8647 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8648};
8649#endif
8650
ec011fe8 8651static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8652 .get_locations = _nfs40_proc_get_locations,
44c99933 8653 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8654};
8655
8656#if defined(CONFIG_NFS_V4_1)
8657static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8658 .get_locations = _nfs41_proc_get_locations,
44c99933 8659 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8660};
8661#endif /* CONFIG_NFS_V4_1 */
8662
97dc1359
TM		 8663static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8664 .minor_version = 0,
39c6daae
TM		 8665 .init_caps = NFS_CAP_READDIRPLUS
8666 | NFS_CAP_ATOMIC_OPEN
39c6daae 8667 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8668 .init_client = nfs40_init_client,
8669 .shutdown_client = nfs40_shutdown_client,
36281caa 8670 .match_stateid = nfs4_match_stateid,
fca78d6d 8671 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8672 .free_lock_state = nfs4_release_lockowner,
63f5f796 8673 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 8674 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8675 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8676 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8677 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8678 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8679};
8680
8681#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 8682static struct nfs_seqid *
8683nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8684{
8685 return NULL;
8686}
8687
97dc1359
TM		 8688static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8689 .minor_version = 1,
39c6daae
TM		 8690 .init_caps = NFS_CAP_READDIRPLUS
8691 | NFS_CAP_ATOMIC_OPEN
3b66486c 8692 | NFS_CAP_POSIX_LOCK
49f9a0fa 8693 | NFS_CAP_STATEID_NFSV41
e983120e 8694 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8695 .init_client = nfs41_init_client,
8696 .shutdown_client = nfs41_shutdown_client,
36281caa 8697 .match_stateid = nfs41_match_stateid,
fca78d6d 8698 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8699 .free_lock_state = nfs41_free_lock_state,
63f5f796 8700 .alloc_seqid = nfs_alloc_no_seqid,
9915ea7e 8701 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8702 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8703 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8704 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8705 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8706};
8707#endif
8708
42c2c424
SD		 8709#if defined(CONFIG_NFS_V4_2)
8710static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8711 .minor_version = 2,
7017310a
BS		 8712 .init_caps = NFS_CAP_READDIRPLUS
8713 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 8714 | NFS_CAP_POSIX_LOCK
8715 | NFS_CAP_STATEID_NFSV41
e983120e 8716 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 8717 | NFS_CAP_ALLOCATE
624bd5b7 8718 | NFS_CAP_DEALLOCATE
6c5a0d89 8719 | NFS_CAP_SEEK
e5341f3a
PT		 8720 | NFS_CAP_LAYOUTSTATS
8721 | NFS_CAP_CLONE,
abf79bb3
CL		 8722 .init_client = nfs41_init_client,
8723 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8724 .match_stateid = nfs41_match_stateid,
8725 .find_root_sec = nfs41_find_root_sec,
7017310a 8726 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8727 .call_sync_ops = &nfs41_call_sync_ops,
63f5f796 8728 .alloc_seqid = nfs_alloc_no_seqid,
42c2c424
SD		 8729 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8730 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8731 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 8732 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 8733};
8734#endif
8735
97dc1359
TM		 8736const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8737 [0] = &nfs_v4_0_minor_ops,
8738#if defined(CONFIG_NFS_V4_1)
8739 [1] = &nfs_v4_1_minor_ops,
8740#endif
42c2c424
SD		 8741#if defined(CONFIG_NFS_V4_2)
8742 [2] = &nfs_v4_2_minor_ops,
8743#endif
97dc1359
TM		 8744};
8745
17f26b12 8746static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8747 .create = nfs_create,
8748 .lookup = nfs_lookup,
8749 .atomic_open = nfs_atomic_open,
8750 .link = nfs_link,
8751 .unlink = nfs_unlink,
8752 .symlink = nfs_symlink,
8753 .mkdir = nfs_mkdir,
8754 .rmdir = nfs_rmdir,
8755 .mknod = nfs_mknod,
8756 .rename = nfs_rename,
8757 .permission = nfs_permission,
8758 .getattr = nfs_getattr,
8759 .setattr = nfs_setattr,
8760 .getxattr = generic_getxattr,
8761 .setxattr = generic_setxattr,
8762 .listxattr = generic_listxattr,
8763 .removexattr = generic_removexattr,
8764};
8765
92e1d5be 8766static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8767 .permission = nfs_permission,
8768 .getattr = nfs_getattr,
8769 .setattr = nfs_setattr,
64c2ce8b
AK		 8770 .getxattr = generic_getxattr,
8771 .setxattr = generic_setxattr,
8772 .listxattr = generic_listxattr,
8773 .removexattr = generic_removexattr,
6b3b5496
BF		 8774};
8775
509de811 8776const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8777 .version = 4, /* protocol version */
8778 .dentry_ops = &nfs4_dentry_operations,
8779 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8780 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8781 .file_ops = &nfs4_file_operations,
1da177e4 8782 .getroot = nfs4_proc_get_root,
281cad46 8783 .submount = nfs4_submount,
ff9099f2 8784 .try_mount = nfs4_try_mount,
1da177e4
LT		 8785 .getattr = nfs4_proc_getattr,
8786 .setattr = nfs4_proc_setattr,
8787 .lookup = nfs4_proc_lookup,
8788 .access = nfs4_proc_access,
8789 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8790 .create = nfs4_proc_create,
8791 .remove = nfs4_proc_remove,
8792 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8793 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8794 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8795 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8796 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8797 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8798 .link = nfs4_proc_link,
8799 .symlink = nfs4_proc_symlink,
8800 .mkdir = nfs4_proc_mkdir,
8801 .rmdir = nfs4_proc_remove,
8802 .readdir = nfs4_proc_readdir,
8803 .mknod = nfs4_proc_mknod,
8804 .statfs = nfs4_proc_statfs,
8805 .fsinfo = nfs4_proc_fsinfo,
8806 .pathconf = nfs4_proc_pathconf,
e9326dca 8807 .set_capabilities = nfs4_server_capabilities,
1da177e4 8808 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8809 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8810 .read_setup = nfs4_proc_read_setup,
ec06c096 8811 .read_done = nfs4_read_done,
1da177e4 8812 .write_setup = nfs4_proc_write_setup,
788e7a89 8813 .write_done = nfs4_write_done,
1da177e4 8814 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8815 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8816 .commit_done = nfs4_commit_done,
1da177e4 8817 .lock = nfs4_proc_lock,
e50a1c2e 8818 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8819 .close_context = nfs4_close_context,
2b484297 8820 .open_context = nfs4_atomic_open,
011e2a7f 8821 .have_delegation = nfs4_have_delegation,
57ec14c5 8822 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8823 .alloc_client = nfs4_alloc_client,
45a52a02 8824 .init_client = nfs4_init_client,
cdb7eced 8825 .free_client = nfs4_free_client,
1179acc6
BS		 8826 .create_server = nfs4_create_server,
8827 .clone_server = nfs_clone_server,
1da177e4
LT		 8828};
8829
64c2ce8b 8830static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
98e9cb57 8831 .name = XATTR_NAME_NFSV4_ACL,
64c2ce8b
AK		 8832 .list = nfs4_xattr_list_nfs4_acl,
8833 .get = nfs4_xattr_get_nfs4_acl,
8834 .set = nfs4_xattr_set_nfs4_acl,
8835};
8836
8837const struct xattr_handler *nfs4_xattr_handlers[] = {
8838 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8839#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8840 &nfs4_xattr_nfs4_label_handler,
8841#endif
64c2ce8b
AK		 8842 NULL
8843};
8844
1da177e4
LT		 8845/*
8846 * Local variables:
8847 * c-basic-offset: 8
8848 * End:
8849 */
Linux 6.x block layer and io_uring tree(s)