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nfs: fix oops when trying to set SELinux label
[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>
41#include <linux/string.h>
652f89f6
TM		 42#include <linux/ratelimit.h>
43#include <linux/printk.h>
5a0e3ad6 44#include <linux/slab.h>
1da177e4
LT		 45#include <linux/sunrpc/clnt.h>
46#include <linux/nfs.h>
47#include <linux/nfs4.h>
48#include <linux/nfs_fs.h>
49#include <linux/nfs_page.h>
9b7160c5 50#include <linux/nfs_mount.h>
1da177e4 51#include <linux/namei.h>
02a913a7 52#include <linux/mount.h>
99fe60d0 53#include <linux/module.h>
6926afd1 54#include <linux/nfs_idmap.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"
73e39aaa 66#include "nfs4session.h"
de242c0b 67#include "fscache.h"
1da177e4 68
c6d01c6f
TM		 69#include "nfs4trace.h"
70
1da177e4
LT		 71#define NFSDBG_FACILITY NFSDBG_PROC
72
2066fe89 73#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 74#define NFS4_POLL_RETRY_MAX (15*HZ)
75
cdd4e68b 76struct nfs4_opendata;
864472e9 77static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 78static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 79static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
9e33bed5 80static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *);
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
108 if (NFS_SERVER(dir)->nfs_client->cl_minorversion < 2)
109 return NULL;
110
111 err = security_dentry_init_security(dentry, sattr->ia_mode,
112 &dentry->d_name, (void **)&label->label, &label->len);
113 if (err == 0)
114 return label;
115
116 return NULL;
117}
118static inline void
119nfs4_label_release_security(struct nfs4_label *label)
120{
121 if (label)
122 security_release_secctx(label->label, label->len);
123}
124static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
125{
126 if (label)
127 return server->attr_bitmask;
128
129 return server->attr_bitmask_nl;
130}
131#else
132static inline struct nfs4_label *
133nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
134 struct iattr *sattr, struct nfs4_label *l)
135{ return NULL; }
136static inline void
137nfs4_label_release_security(struct nfs4_label *label)
138{ return; }
139static inline u32 *
140nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
141{ return server->attr_bitmask; }
142#endif
143
1da177e4 144/* Prevent leaks of NFSv4 errors into userland */
46f72f57 145static int nfs4_map_errors(int err)
1da177e4 146{
52567b03
TM		 147 if (err >= -1000)
148 return err;
149 switch (err) {
150 case -NFS4ERR_RESOURCE:
30005121
WAA		 151 case -NFS4ERR_LAYOUTTRYLATER:
152 case -NFS4ERR_RECALLCONFLICT:
52567b03 153 return -EREMOTEIO;
7ebb9315 154 case -NFS4ERR_WRONGSEC:
8897538e 155 case -NFS4ERR_WRONG_CRED:
7ebb9315 156 return -EPERM;
3ddeb7c5
TM		 157 case -NFS4ERR_BADOWNER:
158 case -NFS4ERR_BADNAME:
159 return -EINVAL;
fb13bfa7
TM		 160 case -NFS4ERR_SHARE_DENIED:
161 return -EACCES;
f25efd85
SD		 162 case -NFS4ERR_MINOR_VERS_MISMATCH:
163 return -EPROTONOSUPPORT;
6168f62c
WAA		 164 case -NFS4ERR_ACCESS:
165 return -EACCES;
6e3cf241
TM		 166 case -NFS4ERR_FILE_OPEN:
167 return -EBUSY;
52567b03 168 default:
1da177e4 169 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 170 __func__, -err);
52567b03 171 break;
1da177e4 172 }
52567b03 173 return -EIO;
1da177e4
LT		 174}
175
176/*
177 * This is our standard bitmap for GETATTR requests.
178 */
1549210f 179const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 180 FATTR4_WORD0_TYPE
181 | FATTR4_WORD0_CHANGE
182 | FATTR4_WORD0_SIZE
183 | FATTR4_WORD0_FSID
184 | FATTR4_WORD0_FILEID,
185 FATTR4_WORD1_MODE
186 | FATTR4_WORD1_NUMLINKS
187 | FATTR4_WORD1_OWNER
188 | FATTR4_WORD1_OWNER_GROUP
189 | FATTR4_WORD1_RAWDEV
190 | FATTR4_WORD1_SPACE_USED
191 | FATTR4_WORD1_TIME_ACCESS
192 | FATTR4_WORD1_TIME_METADATA
aa9c2669
DQ		 193 | FATTR4_WORD1_TIME_MODIFY,
194#ifdef CONFIG_NFS_V4_SECURITY_LABEL
195 FATTR4_WORD2_SECURITY_LABEL
196#endif
1da177e4
LT		 197};
198
1549210f
TM		 199static const u32 nfs4_pnfs_open_bitmap[3] = {
200 FATTR4_WORD0_TYPE
201 | FATTR4_WORD0_CHANGE
202 | FATTR4_WORD0_SIZE
203 | FATTR4_WORD0_FSID
204 | FATTR4_WORD0_FILEID,
205 FATTR4_WORD1_MODE
206 | FATTR4_WORD1_NUMLINKS
207 | FATTR4_WORD1_OWNER
208 | FATTR4_WORD1_OWNER_GROUP
209 | FATTR4_WORD1_RAWDEV
210 | FATTR4_WORD1_SPACE_USED
211 | FATTR4_WORD1_TIME_ACCESS
212 | FATTR4_WORD1_TIME_METADATA
213 | FATTR4_WORD1_TIME_MODIFY,
214 FATTR4_WORD2_MDSTHRESHOLD
215};
216
e23008ec
AA		 217static const u32 nfs4_open_noattr_bitmap[3] = {
218 FATTR4_WORD0_TYPE
219 | FATTR4_WORD0_CHANGE
220 | FATTR4_WORD0_FILEID,
221};
222
a09df2ca 223const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 224 FATTR4_WORD0_FILES_AVAIL
225 | FATTR4_WORD0_FILES_FREE
226 | FATTR4_WORD0_FILES_TOTAL,
227 FATTR4_WORD1_SPACE_AVAIL
228 | FATTR4_WORD1_SPACE_FREE
229 | FATTR4_WORD1_SPACE_TOTAL
230};
231
a09df2ca 232const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 233 FATTR4_WORD0_MAXLINK
234 | FATTR4_WORD0_MAXNAME,
235 0
236};
237
dae100c2 238const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 239 | FATTR4_WORD0_MAXREAD
240 | FATTR4_WORD0_MAXWRITE
241 | FATTR4_WORD0_LEASE_TIME,
55b6e774 242 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 243 | FATTR4_WORD1_FS_LAYOUT_TYPES,
244 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 245};
246
a09df2ca 247const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 248 FATTR4_WORD0_TYPE
249 | FATTR4_WORD0_CHANGE
250 | FATTR4_WORD0_SIZE
251 | FATTR4_WORD0_FSID
252 | FATTR4_WORD0_FILEID
253 | FATTR4_WORD0_FS_LOCATIONS,
254 FATTR4_WORD1_MODE
255 | FATTR4_WORD1_NUMLINKS
256 | FATTR4_WORD1_OWNER
257 | FATTR4_WORD1_OWNER_GROUP
258 | FATTR4_WORD1_RAWDEV
259 | FATTR4_WORD1_SPACE_USED
260 | FATTR4_WORD1_TIME_ACCESS
261 | FATTR4_WORD1_TIME_METADATA
262 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 263 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 264};
265
bc4785cd 266static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 267 struct nfs4_readdir_arg *readdir)
268{
0dbb4c67 269 __be32 *start, *p;
1da177e4 270
1da177e4 271 if (cookie > 2) {
b7ef1956 272 readdir->cookie = cookie;
1da177e4
LT		 273 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
274 return;
275 }
276
277 readdir->cookie = 0;
278 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
279 if (cookie == 2)
280 return;
281
282 /*
283 * NFSv4 servers do not return entries for '.' and '..'
284 * Therefore, we fake these entries here. We let '.'
285 * have cookie 0 and '..' have cookie 1. Note that
286 * when talking to the server, we always send cookie 0
287 * instead of 1 or 2.
288 */
2b86ce2d 289 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 290
291 if (cookie == 0) {
292 *p++ = xdr_one; /* next */
293 *p++ = xdr_zero; /* cookie, first word */
294 *p++ = xdr_one; /* cookie, second word */
295 *p++ = xdr_one; /* entry len */
296 memcpy(p, ".\0\0\0", 4); /* entry */
297 p++;
298 *p++ = xdr_one; /* bitmap length */
299 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
300 *p++ = htonl(8); /* attribute buffer length */
4e769b93 301 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_inode));
1da177e4
LT		 302 }
303
304 *p++ = xdr_one; /* next */
305 *p++ = xdr_zero; /* cookie, first word */
306 *p++ = xdr_two; /* cookie, second word */
307 *p++ = xdr_two; /* entry len */
308 memcpy(p, "..\0\0", 4); /* entry */
309 p++;
310 *p++ = xdr_one; /* bitmap length */
311 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
312 *p++ = htonl(8); /* attribute buffer length */
4e769b93 313 p = xdr_encode_hyper(p, NFS_FILEID(dentry->d_parent->d_inode));
1da177e4
LT		 314
315 readdir->pgbase = (char *)p - (char *)start;
316 readdir->count -= readdir->pgbase;
2b86ce2d 317 kunmap_atomic(start);
1da177e4
LT		 318}
319
65de872e
TM		 320static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
321{
322 int res = 0;
323
324 might_sleep();
325
326 if (*timeout <= 0)
327 *timeout = NFS4_POLL_RETRY_MIN;
328 if (*timeout > NFS4_POLL_RETRY_MAX)
329 *timeout = NFS4_POLL_RETRY_MAX;
416ad3c9 330 freezable_schedule_timeout_killable_unsafe(*timeout);
65de872e
TM		 331 if (fatal_signal_pending(current))
332 res = -ERESTARTSYS;
333 *timeout <<= 1;
334 return res;
335}
336
337/* This is the error handling routine for processes that are allowed
338 * to sleep.
339 */
b064eca2 340static int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 341{
342 struct nfs_client *clp = server->nfs_client;
9e33bed5 343 struct nfs4_state *state = exception->state;
3114ea7a 344 struct inode *inode = exception->inode;
65de872e
TM		 345 int ret = errorcode;
346
347 exception->retry = 0;
348 switch(errorcode) {
349 case 0:
350 return 0;
3114ea7a 351 case -NFS4ERR_OPENMODE:
011e2a7f 352 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 353 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 354 exception->retry = 1;
355 return 0;
356 }
357 if (state == NULL)
358 break;
5d422301
TM		 359 ret = nfs4_schedule_stateid_recovery(server, state);
360 if (ret < 0)
361 break;
3114ea7a 362 goto wait_on_recovery;
a1d0b5ee 363 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 364 case -NFS4ERR_ADMIN_REVOKED:
365 case -NFS4ERR_BAD_STATEID:
b570a975
TM		 366 if (inode != NULL && nfs4_have_delegation(inode, FMODE_READ)) {
367 nfs_remove_bad_delegation(inode);
368 exception->retry = 1;
369 break;
370 }
9e33bed5
TM		 371 if (state == NULL)
372 break;
5d422301
TM		 373 ret = nfs4_schedule_stateid_recovery(server, state);
374 if (ret < 0)
375 break;
0400a6b0 376 goto wait_on_recovery;
0ced63d1 377 case -NFS4ERR_EXPIRED:
5d422301
TM		 378 if (state != NULL) {
379 ret = nfs4_schedule_stateid_recovery(server, state);
380 if (ret < 0)
381 break;
382 }
65de872e 383 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 384 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 385 nfs4_schedule_lease_recovery(clp);
386 goto wait_on_recovery;
519ae255
CL		 387 case -NFS4ERR_MOVED:
388 ret = nfs4_schedule_migration_recovery(server);
389 if (ret < 0)
390 break;
391 goto wait_on_recovery;
8ef2f8d4
CL		 392 case -NFS4ERR_LEASE_MOVED:
393 nfs4_schedule_lease_moved_recovery(clp);
394 goto wait_on_recovery;
03391693 395#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 396 case -NFS4ERR_BADSESSION:
397 case -NFS4ERR_BADSLOT:
398 case -NFS4ERR_BAD_HIGH_SLOT:
399 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
400 case -NFS4ERR_DEADSESSION:
401 case -NFS4ERR_SEQ_FALSE_RETRY:
402 case -NFS4ERR_SEQ_MISORDERED:
403 dprintk("%s ERROR: %d Reset session\n", __func__,
404 errorcode);
9f594791 405 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 406 goto wait_on_recovery;
03391693 407#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 408 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 409 if (exception->timeout > HZ) {
410 /* We have retried a decent amount, time to
411 * fail
412 */
413 ret = -EBUSY;
414 break;
415 }
65de872e
TM		 416 case -NFS4ERR_GRACE:
417 case -NFS4ERR_DELAY:
418 ret = nfs4_delay(server->client, &exception->timeout);
419 if (ret != 0)
420 break;
a8a4ae3a 421 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 422 case -NFS4ERR_OLD_STATEID:
423 exception->retry = 1;
b064eca2
TM		 424 break;
425 case -NFS4ERR_BADOWNER:
426 /* The following works around a Linux server bug! */
427 case -NFS4ERR_BADNAME:
428 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
429 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
430 exception->retry = 1;
431 printk(KERN_WARNING "NFS: v4 server %s "
432 "does not accept raw "
433 "uid/gids. "
434 "Reenabling the idmapper.\n",
435 server->nfs_client->cl_hostname);
436 }
65de872e
TM		 437 }
438 /* We failed to handle the error */
439 return nfs4_map_errors(ret);
0400a6b0 440wait_on_recovery:
a2c0b9e2 441 ret = nfs4_wait_clnt_recover(clp);
519ae255
CL		 442 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
443 return -EIO;
a2c0b9e2
TM		 444 if (ret == 0)
445 exception->retry = 1;
446 return ret;
65de872e
TM		 447}
448
a5250def
WAA		 449/*
450 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
451 * or 'false' otherwise.
452 */
453static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
454{
455 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
456
457 if (flavor == RPC_AUTH_GSS_KRB5I ||
458 flavor == RPC_AUTH_GSS_KRB5P)
459 return true;
460
461 return false;
462}
65de872e 463
452e9352 464static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 465{
1da177e4
LT		 466 spin_lock(&clp->cl_lock);
467 if (time_before(clp->cl_last_renewal,timestamp))
468 clp->cl_last_renewal = timestamp;
469 spin_unlock(&clp->cl_lock);
470}
471
452e9352
TM		 472static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
473{
474 do_renew_lease(server->nfs_client, timestamp);
475}
476
2a3eb2b9
CL		 477struct nfs4_call_sync_data {
478 const struct nfs_server *seq_server;
479 struct nfs4_sequence_args *seq_args;
480 struct nfs4_sequence_res *seq_res;
481};
482
a9c92d6b
CL		 483static void nfs4_init_sequence(struct nfs4_sequence_args *args,
484 struct nfs4_sequence_res *res, int cache_reply)
485{
486 args->sa_slot = NULL;
487 args->sa_cache_this = cache_reply;
488 args->sa_privileged = 0;
489
490 res->sr_slot = NULL;
491}
492
493static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
494{
495 args->sa_privileged = 1;
496}
497
3bd2384a
CL		 498static int nfs40_setup_sequence(const struct nfs_server *server,
499 struct nfs4_sequence_args *args,
500 struct nfs4_sequence_res *res,
501 struct rpc_task *task)
502{
503 struct nfs4_slot_table *tbl = server->nfs_client->cl_slot_tbl;
504 struct nfs4_slot *slot;
505
506 /* slot already allocated? */
507 if (res->sr_slot != NULL)
508 goto out_start;
509
510 spin_lock(&tbl->slot_tbl_lock);
511 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
512 goto out_sleep;
513
514 slot = nfs4_alloc_slot(tbl);
515 if (IS_ERR(slot)) {
516 if (slot == ERR_PTR(-ENOMEM))
517 task->tk_timeout = HZ >> 2;
518 goto out_sleep;
519 }
520 spin_unlock(&tbl->slot_tbl_lock);
521
522 args->sa_slot = slot;
523 res->sr_slot = slot;
524
525out_start:
526 rpc_call_start(task);
527 return 0;
528
529out_sleep:
530 if (args->sa_privileged)
531 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
532 NULL, RPC_PRIORITY_PRIVILEGED);
533 else
534 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
535 spin_unlock(&tbl->slot_tbl_lock);
536 return -EAGAIN;
537}
538
539static int nfs40_sequence_done(struct rpc_task *task,
540 struct nfs4_sequence_res *res)
541{
542 struct nfs4_slot *slot = res->sr_slot;
543 struct nfs4_slot_table *tbl;
544
545 if (!RPC_WAS_SENT(task))
546 goto out;
547
548 tbl = slot->table;
549 spin_lock(&tbl->slot_tbl_lock);
550 if (!nfs41_wake_and_assign_slot(tbl, slot))
551 nfs4_free_slot(tbl, slot);
552 spin_unlock(&tbl->slot_tbl_lock);
553
554 res->sr_slot = NULL;
555out:
556 return 1;
557}
558
cccef3b9
AA		 559#if defined(CONFIG_NFS_V4_1)
560
d185a334 561static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 562{
e3725ec0 563 struct nfs4_session *session;
13615871 564 struct nfs4_slot_table *tbl;
c10e4498 565 bool send_new_highest_used_slotid = false;
13615871 566
dfb4f309 567 if (!res->sr_slot) {
13615871
AA		 568 /* just wake up the next guy waiting since
569 * we may have not consumed a slot after all */
691daf3b 570 dprintk("%s: No slot\n", __func__);
35dc1d74 571 return;
13615871 572 }
e3725ec0
TM		 573 tbl = res->sr_slot->table;
574 session = tbl->session;
ea028ac9 575
35dc1d74 576 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 577 /* Be nice to the server: try to ensure that the last transmitted
578 * value for highest_user_slotid <= target_highest_slotid
579 */
580 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
581 send_new_highest_used_slotid = true;
582
b75ad4cd
TM		 583 if (nfs41_wake_and_assign_slot(tbl, res->sr_slot)) {
584 send_new_highest_used_slotid = false;
585 goto out_unlock;
586 }
f4af6e2a 587 nfs4_free_slot(tbl, res->sr_slot);
c10e4498
TM		 588
589 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
590 send_new_highest_used_slotid = false;
b75ad4cd 591out_unlock:
35dc1d74 592 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 593 res->sr_slot = NULL;
c10e4498
TM		 594 if (send_new_highest_used_slotid)
595 nfs41_server_notify_highest_slotid_update(session->clp);
13615871
AA		 596}
597
14516c3a 598static int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 599{
e3725ec0 600 struct nfs4_session *session;
933602e3 601 struct nfs4_slot *slot;
14516c3a 602 struct nfs_client *clp;
ac20d163 603 bool interrupted = false;
85563073 604 int ret = 1;
b0df806c 605
468f8613
BS		 606 /* don't increment the sequence number if the task wasn't sent */
607 if (!RPC_WAS_SENT(task))
b0df806c
AA		 608 goto out;
609
933602e3 610 slot = res->sr_slot;
e3725ec0 611 session = slot->table->session;
933602e3 612
ac20d163
TM		 613 if (slot->interrupted) {
614 slot->interrupted = 0;
615 interrupted = true;
616 }
617
2f92ae34 618 trace_nfs4_sequence_done(session, res);
691daf3b 619 /* Check the SEQUENCE operation status */
14516c3a
TM		 620 switch (res->sr_status) {
621 case 0:
b0df806c 622 /* Update the slot's sequence and clientid lease timer */
933602e3 623 ++slot->seq_nr;
e3725ec0 624 clp = session->clp;
8e63b6a8 625 do_renew_lease(clp, res->sr_timestamp);
0629e370 626 /* Check sequence flags */
b4410c2f
TM		 627 if (res->sr_status_flags != 0)
628 nfs4_schedule_lease_recovery(clp);
464ee9f9 629 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 630 break;
ac20d163
TM		 631 case 1:
632 /*
633 * sr_status remains 1 if an RPC level error occurred.
634 * The server may or may not have processed the sequence
635 * operation..
636 * Mark the slot as having hosted an interrupted RPC call.
637 */
638 slot->interrupted = 1;
639 goto out;
14516c3a
TM		 640 case -NFS4ERR_DELAY:
641 /* The server detected a resend of the RPC call and
642 * returned NFS4ERR_DELAY as per Section 2.10.6.2
643 * of RFC5661.
644 */
df2fabff 645 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 646 __func__,
df2fabff 647 slot->slot_nr,
933602e3 648 slot->seq_nr);
14516c3a 649 goto out_retry;
85563073
TM		 650 case -NFS4ERR_BADSLOT:
651 /*
652 * The slot id we used was probably retired. Try again
653 * using a different slot id.
654 */
e8794440
TM		 655 goto retry_nowait;
656 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 657 /*
658 * Was the last operation on this sequence interrupted?
659 * If so, retry after bumping the sequence number.
660 */
661 if (interrupted) {
662 ++slot->seq_nr;
663 goto retry_nowait;
664 }
e8794440
TM		 665 /*
666 * Could this slot have been previously retired?
667 * If so, then the server may be expecting seq_nr = 1!
668 */
8e63b6a8
TM		 669 if (slot->seq_nr != 1) {
670 slot->seq_nr = 1;
671 goto retry_nowait;
672 }
673 break;
e8794440
TM		 674 case -NFS4ERR_SEQ_FALSE_RETRY:
675 ++slot->seq_nr;
676 goto retry_nowait;
14516c3a
TM		 677 default:
678 /* Just update the slot sequence no. */
933602e3 679 ++slot->seq_nr;
b0df806c
AA		 680 }
681out:
682 /* The session may be reset by one of the error handlers. */
683 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 684 nfs41_sequence_free_slot(res);
85563073 685 return ret;
e8794440
TM		 686retry_nowait:
687 if (rpc_restart_call_prepare(task)) {
688 task->tk_status = 0;
689 ret = 0;
690 }
691 goto out;
14516c3a 692out_retry:
d05dd4e9 693 if (!rpc_restart_call(task))
14516c3a
TM		 694 goto out;
695 rpc_delay(task, NFS4_POLL_RETRY_MAX);
696 return 0;
b0df806c
AA		 697}
698
14516c3a
TM		 699static int nfs4_sequence_done(struct rpc_task *task,
700 struct nfs4_sequence_res *res)
df896455 701{
e3725ec0 702 if (res->sr_slot == NULL)
14516c3a 703 return 1;
3bd2384a
CL		 704 if (!res->sr_slot->table->session)
705 return nfs40_sequence_done(task, res);
14516c3a 706 return nfs41_sequence_done(task, res);
df896455
TM		 707}
708
dc70d7b3 709int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 710 struct nfs4_sequence_args *args,
711 struct nfs4_sequence_res *res,
ce5039c1
AA		 712 struct rpc_task *task)
713{
fbcd4abc
AA		 714 struct nfs4_slot *slot;
715 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 716
717 dprintk("--> %s\n", __func__);
ce5039c1 718 /* slot already allocated? */
dfb4f309 719 if (res->sr_slot != NULL)
d9afbd1b 720 goto out_success;
ce5039c1 721
fbcd4abc
AA		 722 tbl = &session->fc_slot_table;
723
69d206b5
TM		 724 task->tk_timeout = 0;
725
fbcd4abc 726 spin_lock(&tbl->slot_tbl_lock);
774d5f14 727 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 728 !args->sa_privileged) {
0b1c8fc4 729 /* The state manager will wait until the slot table is empty */
0b1c8fc4 730 dprintk("%s session is draining\n", __func__);
7b939a3f 731 goto out_sleep;
689cf5c1
AB		 732 }
733
2dc03b7f 734 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 735 if (IS_ERR(slot)) {
736 /* If out of memory, try again in 1/4 second */
737 if (slot == ERR_PTR(-ENOMEM))
738 task->tk_timeout = HZ >> 2;
fbcd4abc 739 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 740 goto out_sleep;
fbcd4abc
AA		 741 }
742 spin_unlock(&tbl->slot_tbl_lock);
743
2b2fa717 744 args->sa_slot = slot;
fbcd4abc 745
e8d92382 746 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 747 slot->slot_nr, slot->seq_nr);
fbcd4abc 748
dfb4f309 749 res->sr_slot = slot;
8e63b6a8 750 res->sr_timestamp = jiffies;
2a6e26cd 751 res->sr_status_flags = 0;
fbcd4abc
AA		 752 /*
753 * sr_status is only set in decode_sequence, and so will remain
754 * set to 1 if an rpc level failure occurs.
755 */
756 res->sr_status = 1;
2f92ae34 757 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 758out_success:
759 rpc_call_start(task);
ce5039c1 760 return 0;
7b939a3f 761out_sleep:
8fe72bac
TM		 762 /* Privileged tasks are queued with top priority */
763 if (args->sa_privileged)
1e1093c7
TM		 764 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
765 NULL, RPC_PRIORITY_PRIVILEGED);
766 else
767 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 768 spin_unlock(&tbl->slot_tbl_lock);
769 return -EAGAIN;
ce5039c1 770}
dc70d7b3 771EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 772
5a580e0a
CL		 773static int nfs4_setup_sequence(const struct nfs_server *server,
774 struct nfs4_sequence_args *args,
775 struct nfs4_sequence_res *res,
776 struct rpc_task *task)
ce5039c1 777{
035168ab 778 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 779 int ret = 0;
780
3bd2384a
CL		 781 if (!session)
782 return nfs40_setup_sequence(server, args, res, task);
035168ab 783
e8d92382 784 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 785 __func__, session->clp, session, res->sr_slot ?
e8d92382 786 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 787
9d12b216 788 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 789
ce5039c1
AA		 790 dprintk("<-- %s status=%d\n", __func__, ret);
791 return ret;
792}
793
ce5039c1
AA		 794static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
795{
2a3eb2b9 796 struct nfs4_call_sync_data *data = calldata;
6ba7db34 797 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 798
035168ab
TM		 799 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
800
d9afbd1b 801 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 802}
803
69ab40c4
AA		 804static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
805{
2a3eb2b9 806 struct nfs4_call_sync_data *data = calldata;
69ab40c4 807
14516c3a 808 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 809}
810
17280175 811static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 812 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 813 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 814};
815
3bd2384a
CL		 816#else /* !CONFIG_NFS_V4_1 */
817
9915ea7e
CL		 818static int nfs4_setup_sequence(const struct nfs_server *server,
819 struct nfs4_sequence_args *args,
820 struct nfs4_sequence_res *res,
821 struct rpc_task *task)
822{
3bd2384a 823 return nfs40_setup_sequence(server, args, res, task);
9915ea7e
CL		 824}
825
826static int nfs4_sequence_done(struct rpc_task *task,
827 struct nfs4_sequence_res *res)
828{
3bd2384a 829 return nfs40_sequence_done(task, res);
9915ea7e 830}
3bd2384a
CL		 831
832#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 833
834static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
835{
836 struct nfs4_call_sync_data *data = calldata;
837 nfs4_setup_sequence(data->seq_server,
838 data->seq_args, data->seq_res, task);
839}
840
841static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
842{
843 struct nfs4_call_sync_data *data = calldata;
844 nfs4_sequence_done(task, data->seq_res);
845}
846
847static const struct rpc_call_ops nfs40_call_sync_ops = {
848 .rpc_call_prepare = nfs40_call_sync_prepare,
849 .rpc_call_done = nfs40_call_sync_done,
850};
851
7c513058
BS		 852static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
853 struct nfs_server *server,
ce5039c1
AA		 854 struct rpc_message *msg,
855 struct nfs4_sequence_args *args,
8fe72bac 856 struct nfs4_sequence_res *res)
ce5039c1
AA		 857{
858 int ret;
859 struct rpc_task *task;
9915ea7e 860 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 861 struct nfs4_call_sync_data data = {
035168ab 862 .seq_server = server,
ce5039c1
AA		 863 .seq_args = args,
864 .seq_res = res,
ce5039c1
AA		 865 };
866 struct rpc_task_setup task_setup = {
7c513058 867 .rpc_client = clnt,
ce5039c1 868 .rpc_message = msg,
9915ea7e 869 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 870 .callback_data = &data
871 };
872
ce5039c1
AA		 873 task = rpc_run_task(&task_setup);
874 if (IS_ERR(task))
875 ret = PTR_ERR(task);
876 else {
877 ret = task->tk_status;
878 rpc_put_task(task);
879 }
880 return ret;
881}
882
fd0c0953 883static
7c513058
BS		 884int nfs4_call_sync(struct rpc_clnt *clnt,
885 struct nfs_server *server,
e73b83f2
BS		 886 struct rpc_message *msg,
887 struct nfs4_sequence_args *args,
888 struct nfs4_sequence_res *res,
889 int cache_reply)
890{
a9c92d6b 891 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 892 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 893}
cccef3b9 894
38478b24 895static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 896{
38478b24 897 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 898
38478b24 899 spin_lock(&dir->i_lock);
359d7d1c 900 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 901 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 902 nfs_force_lookup_revalidate(dir);
a9a4a87a 903 dir->i_version = cinfo->after;
de242c0b 904 nfs_fscache_invalidate(dir);
38478b24 905 spin_unlock(&dir->i_lock);
1da177e4
LT		 906}
907
e56e0b78 908struct nfs4_opendata {
c6d00e63 909 struct kref kref;
e56e0b78
TM		 910 struct nfs_openargs o_arg;
911 struct nfs_openres o_res;
cdd4e68b
TM		 912 struct nfs_open_confirmargs c_arg;
913 struct nfs_open_confirmres c_res;
6926afd1
TM		 914 struct nfs4_string owner_name;
915 struct nfs4_string group_name;
e56e0b78 916 struct nfs_fattr f_attr;
1775fd3e 917 struct nfs4_label *f_label;
e56e0b78 918 struct dentry *dir;
82a2c1b7 919 struct dentry *dentry;
e56e0b78 920 struct nfs4_state_owner *owner;
aac00a8d 921 struct nfs4_state *state;
e56e0b78 922 struct iattr attrs;
26e976a8 923 unsigned long timestamp;
3e309914 924 unsigned int rpc_done : 1;
5bc2afc2 925 unsigned int file_created : 1;
bdeca1b7 926 unsigned int is_recover : 1;
24ac23ab
TM		 927 int rpc_status;
928 int cancelled;
e56e0b78
TM		 929};
930
49f9a0fa
TM		 931static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
932 int err, struct nfs4_exception *exception)
933{
934 if (err != -EINVAL)
935 return false;
936 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
937 return false;
938 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
939 exception->retry = 1;
940 return true;
941}
942
943static enum open_claim_type4
944nfs4_map_atomic_open_claim(struct nfs_server *server,
945 enum open_claim_type4 claim)
946{
947 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
948 return claim;
949 switch (claim) {
950 default:
951 return claim;
952 case NFS4_OPEN_CLAIM_FH:
953 return NFS4_OPEN_CLAIM_NULL;
954 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
955 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
956 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
957 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
958 }
959}
2ced46c2
TM		 960
961static void nfs4_init_opendata_res(struct nfs4_opendata *p)
962{
963 p->o_res.f_attr = &p->f_attr;
1775fd3e 964 p->o_res.f_label = p->f_label;
c1d51931
TM		 965 p->o_res.seqid = p->o_arg.seqid;
966 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 967 p->o_res.server = p->o_arg.server;
5f657530 968 p->o_res.access_request = p->o_arg.access;
2ced46c2 969 nfs_fattr_init(&p->f_attr);
6926afd1 970 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 971}
972
82a2c1b7 973static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 974 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 975 const struct iattr *attrs,
1775fd3e 976 struct nfs4_label *label,
4a1c0893 977 enum open_claim_type4 claim,
8535b2be 978 gfp_t gfp_mask)
e56e0b78 979{
82a2c1b7 980 struct dentry *parent = dget_parent(dentry);
e56e0b78
TM		 981 struct inode *dir = parent->d_inode;
982 struct nfs_server *server = NFS_SERVER(dir);
983 struct nfs4_opendata *p;
984
8535b2be 985 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 986 if (p == NULL)
987 goto err;
14c43f76
DQ		 988
989 p->f_label = nfs4_label_alloc(server, gfp_mask);
990 if (IS_ERR(p->f_label))
991 goto err_free_p;
992
8535b2be 993 p->o_arg.seqid = nfs_alloc_seqid(&sp->so_seqid, gfp_mask);
e56e0b78 994 if (p->o_arg.seqid == NULL)
14c43f76 995 goto err_free_label;
82a2c1b7
AV		 996 nfs_sb_active(dentry->d_sb);
997 p->dentry = dget(dentry);
e56e0b78
TM		 998 p->dir = parent;
999 p->owner = sp;
1000 atomic_inc(&sp->so_count);
dc0b027d
TM		 1001 p->o_arg.open_flags = flags;
1002 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
ae2bb032
WAA		 1003 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1004 * will return permission denied for all bits until close */
1005 if (!(flags & O_EXCL)) {
1006 /* ask server to check for all possible rights as results
1007 * are cached */
1008 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1009 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1010 }
7539bbab 1011 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1012 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1013 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1014 p->o_arg.name = &dentry->d_name;
e56e0b78 1015 p->o_arg.server = server;
aa9c2669 1016 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1017 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
1775fd3e 1018 p->o_arg.label = label;
49f9a0fa
TM		 1019 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1020 switch (p->o_arg.claim) {
4a1c0893
TM		 1021 case NFS4_OPEN_CLAIM_NULL:
1022 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1023 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1024 p->o_arg.fh = NFS_FH(dir);
1025 break;
1026 case NFS4_OPEN_CLAIM_PREVIOUS:
1027 case NFS4_OPEN_CLAIM_FH:
1028 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1029 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
1030 p->o_arg.fh = NFS_FH(dentry->d_inode);
1031 }
536e43d1 1032 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1033 __u32 verf[2];
d77d76ff 1034
e56e0b78
TM		 1035 p->o_arg.u.attrs = &p->attrs;
1036 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1037
1038 verf[0] = jiffies;
1039 verf[1] = current->pid;
1040 memcpy(p->o_arg.u.verifier.data, verf,
1041 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1042 }
cdd4e68b
TM		 1043 p->c_arg.fh = &p->o_res.fh;
1044 p->c_arg.stateid = &p->o_res.stateid;
1045 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1046 nfs4_init_opendata_res(p);
c6d00e63 1047 kref_init(&p->kref);
e56e0b78 1048 return p;
14c43f76
DQ		 1049
1050err_free_label:
1051 nfs4_label_free(p->f_label);
1052err_free_p:
e56e0b78
TM		 1053 kfree(p);
1054err:
1055 dput(parent);
1056 return NULL;
1057}
1058
c6d00e63 1059static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1060{
c6d00e63
TM		 1061 struct nfs4_opendata *p = container_of(kref,
1062 struct nfs4_opendata, kref);
82a2c1b7 1063 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1064
1065 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1066 if (p->state != NULL)
1067 nfs4_put_open_state(p->state);
c6d00e63 1068 nfs4_put_state_owner(p->owner);
14c43f76
DQ		 1069
1070 nfs4_label_free(p->f_label);
1071
c6d00e63 1072 dput(p->dir);
82a2c1b7
AV		 1073 dput(p->dentry);
1074 nfs_sb_deactive(sb);
6926afd1 1075 nfs_fattr_free_names(&p->f_attr);
c6d00e63
TM		 1076 kfree(p);
1077}
1078
1079static void nfs4_opendata_put(struct nfs4_opendata *p)
1080{
1081 if (p != NULL)
1082 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1083}
1084
06f814a3
TM		 1085static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1086{
06f814a3
TM		 1087 int ret;
1088
06f814a3 1089 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1090 return ret;
1091}
1092
dc0b027d 1093static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1094{
1095 int ret = 0;
dc0b027d 1096
536e43d1 1097 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1098 goto out;
1099 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1100 case FMODE_READ:
88069f77
TM		 1101 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1102 && state->n_rdonly != 0;
6ee41268
TM		 1103 break;
1104 case FMODE_WRITE:
88069f77
TM		 1105 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1106 && state->n_wronly != 0;
6ee41268
TM		 1107 break;
1108 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1109 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1110 && state->n_rdwr != 0;
6ee41268 1111 }
dc0b027d 1112out:
6ee41268
TM		 1113 return ret;
1114}
1115
dc0b027d 1116static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1117{
652f89f6
TM		 1118 if (delegation == NULL)
1119 return 0;
dc0b027d 1120 if ((delegation->type & fmode) != fmode)
aac00a8d 1121 return 0;
15c831bf 1122 if (test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
aac00a8d 1123 return 0;
d25be546
TM		 1124 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1125 return 0;
b7391f44 1126 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1127 return 1;
1128}
1129
dc0b027d 1130static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1131{
dc0b027d 1132 switch (fmode) {
e7616923
TM		 1133 case FMODE_WRITE:
1134 state->n_wronly++;
1135 break;
1136 case FMODE_READ:
1137 state->n_rdonly++;
1138 break;
1139 case FMODE_READ|FMODE_WRITE:
1140 state->n_rdwr++;
1141 }
dc0b027d 1142 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1143}
1144
dc0b027d 1145static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7
TM		 1146{
1147 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1148 nfs4_stateid_copy(&state->stateid, stateid);
1149 nfs4_stateid_copy(&state->open_stateid, stateid);
92b40e93 1150 set_bit(NFS_OPEN_STATE, &state->flags);
dc0b027d 1151 switch (fmode) {
003707c7
TM		 1152 case FMODE_READ:
1153 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1154 break;
1155 case FMODE_WRITE:
1156 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1157 break;
1158 case FMODE_READ|FMODE_WRITE:
1159 set_bit(NFS_O_RDWR_STATE, &state->flags);
1160 }
e7616923
TM		 1161}
1162
dc0b027d 1163static void nfs_set_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1164{
8bda4e4c 1165 write_seqlock(&state->seqlock);
dc0b027d 1166 nfs_set_open_stateid_locked(state, stateid, fmode);
8bda4e4c 1167 write_sequnlock(&state->seqlock);
003707c7
TM		 1168}
1169
dc0b027d 1170static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1171{
8bda4e4c
TM		 1172 /*
1173 * Protect the call to nfs4_state_set_mode_locked and
1174 * serialise the stateid update
1175 */
1176 write_seqlock(&state->seqlock);
003707c7 1177 if (deleg_stateid != NULL) {
f597c537 1178 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1179 set_bit(NFS_DELEGATED_STATE, &state->flags);
1180 }
1181 if (open_stateid != NULL)
dc0b027d 1182 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1183 write_sequnlock(&state->seqlock);
1184 spin_lock(&state->owner->so_lock);
dc0b027d 1185 update_open_stateflags(state, fmode);
ec073428 1186 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1187}
1188
dc0b027d 1189static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1190{
1191 struct nfs_inode *nfsi = NFS_I(state->inode);
1192 struct nfs_delegation *deleg_cur;
1193 int ret = 0;
1194
dc0b027d 1195 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1196
1197 rcu_read_lock();
1198 deleg_cur = rcu_dereference(nfsi->delegation);
1199 if (deleg_cur == NULL)
1200 goto no_delegation;
1201
1202 spin_lock(&deleg_cur->lock);
17f26b12 1203 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1204 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1205 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1206 goto no_delegation_unlock;
1207
1208 if (delegation == NULL)
1209 delegation = &deleg_cur->stateid;
f597c537 1210 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1211 goto no_delegation_unlock;
1212
b7391f44 1213 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1214 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1215 ret = 1;
1216no_delegation_unlock:
1217 spin_unlock(&deleg_cur->lock);
1218no_delegation:
1219 rcu_read_unlock();
1220
1221 if (!ret && open_stateid != NULL) {
dc0b027d 1222 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1223 ret = 1;
1224 }
1225
1226 return ret;
1227}
1228
1229
dc0b027d 1230static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1231{
1232 struct nfs_delegation *delegation;
1233
1234 rcu_read_lock();
1235 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1236 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1237 rcu_read_unlock();
1238 return;
1239 }
1240 rcu_read_unlock();
57ec14c5 1241 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1242}
1243
6ee41268 1244static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1245{
1246 struct nfs4_state *state = opendata->state;
1247 struct nfs_inode *nfsi = NFS_I(state->inode);
1248 struct nfs_delegation *delegation;
f448badd 1249 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1250 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1251 nfs4_stateid stateid;
1252 int ret = -EAGAIN;
1253
aac00a8d 1254 for (;;) {
dc0b027d 1255 if (can_open_cached(state, fmode, open_mode)) {
6ee41268 1256 spin_lock(&state->owner->so_lock);
dc0b027d
TM		 1257 if (can_open_cached(state, fmode, open_mode)) {
1258 update_open_stateflags(state, fmode);
6ee41268 1259 spin_unlock(&state->owner->so_lock);
6ee41268
TM		 1260 goto out_return_state;
1261 }
1262 spin_unlock(&state->owner->so_lock);
1263 }
34310430
TM		 1264 rcu_read_lock();
1265 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1266 if (!can_open_delegated(delegation, fmode)) {
34310430 1267 rcu_read_unlock();
aac00a8d 1268 break;
34310430 1269 }
aac00a8d 1270 /* Save the delegation */
f597c537 1271 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1272 rcu_read_unlock();
fa332941 1273 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1274 if (!opendata->is_recover) {
1275 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1276 if (ret != 0)
1277 goto out;
1278 }
aac00a8d 1279 ret = -EAGAIN;
34310430
TM		 1280
1281 /* Try to update the stateid using the delegation */
dc0b027d 1282 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1283 goto out_return_state;
aac00a8d 1284 }
aac00a8d
TM		 1285out:
1286 return ERR_PTR(ret);
1287out_return_state:
1288 atomic_inc(&state->count);
1289 return state;
1290}
1291
e23008ec
AA		 1292static void
1293nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1294{
1295 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1296 struct nfs_delegation *delegation;
1297 int delegation_flags = 0;
1298
1299 rcu_read_lock();
1300 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1301 if (delegation)
1302 delegation_flags = delegation->flags;
1303 rcu_read_unlock();
1304 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1305 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1306 "returning a delegation for "
1307 "OPEN(CLAIM_DELEGATE_CUR)\n",
1308 clp->cl_hostname);
1309 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1310 nfs_inode_set_delegation(state->inode,
1311 data->owner->so_cred,
1312 &data->o_res);
1313 else
1314 nfs_inode_reclaim_delegation(state->inode,
1315 data->owner->so_cred,
1316 &data->o_res);
1317}
1318
1319/*
1320 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1321 * and update the nfs4_state.
1322 */
1323static struct nfs4_state *
1324_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1325{
1326 struct inode *inode = data->state->inode;
1327 struct nfs4_state *state = data->state;
1328 int ret;
1329
d2bfda2e
WAA		 1330 if (!data->rpc_done) {
1331 if (data->rpc_status) {
1332 ret = data->rpc_status;
1333 goto err;
1334 }
1335 /* cached opens have already been processed */
1336 goto update;
e23008ec
AA		 1337 }
1338
e23008ec
AA		 1339 ret = nfs_refresh_inode(inode, &data->f_attr);
1340 if (ret)
1341 goto err;
1342
1343 if (data->o_res.delegation_type != 0)
1344 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1345update:
e23008ec
AA		 1346 update_open_stateid(state, &data->o_res.stateid, NULL,
1347 data->o_arg.fmode);
d49f042a 1348 atomic_inc(&state->count);
e23008ec
AA		 1349
1350 return state;
1351err:
1352 return ERR_PTR(ret);
1353
1354}
1355
1356static struct nfs4_state *
1357_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1358{
1359 struct inode *inode;
1360 struct nfs4_state *state = NULL;
1b370bc2 1361 int ret;
24ac23ab 1362
aac00a8d 1363 if (!data->rpc_done) {
6ee41268 1364 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1365 goto out;
1366 }
1367
1b370bc2 1368 ret = -EAGAIN;
24ac23ab 1369 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1370 goto err;
1775fd3e 1371 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1372 ret = PTR_ERR(inode);
03f28e3a 1373 if (IS_ERR(inode))
1b370bc2
TM		 1374 goto err;
1375 ret = -ENOMEM;
24ac23ab
TM		 1376 state = nfs4_get_open_state(inode, data->owner);
1377 if (state == NULL)
1b370bc2 1378 goto err_put_inode;
e23008ec
AA		 1379 if (data->o_res.delegation_type != 0)
1380 nfs4_opendata_check_deleg(data, state);
34310430 1381 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1382 data->o_arg.fmode);
24ac23ab 1383 iput(inode);
aac00a8d 1384out:
7aa262b5 1385 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1386 return state;
1b370bc2
TM		 1387err_put_inode:
1388 iput(inode);
1389err:
1390 return ERR_PTR(ret);
24ac23ab
TM		 1391}
1392
e23008ec
AA		 1393static struct nfs4_state *
1394nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1395{
1396 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1397 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1398 return _nfs4_opendata_to_nfs4_state(data);
1399}
1400
864472e9
TM		 1401static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1402{
1403 struct nfs_inode *nfsi = NFS_I(state->inode);
1404 struct nfs_open_context *ctx;
1405
1406 spin_lock(&state->inode->i_lock);
1407 list_for_each_entry(ctx, &nfsi->open_files, list) {
1408 if (ctx->state != state)
1409 continue;
1410 get_nfs_open_context(ctx);
1411 spin_unlock(&state->inode->i_lock);
1412 return ctx;
1413 }
1414 spin_unlock(&state->inode->i_lock);
1415 return ERR_PTR(-ENOENT);
1416}
1417
4a1c0893
TM		 1418static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1419 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1420{
1421 struct nfs4_opendata *opendata;
1422
4a1c0893 1423 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1424 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1425 if (opendata == NULL)
1426 return ERR_PTR(-ENOMEM);
1427 opendata->state = state;
1428 atomic_inc(&state->count);
1429 return opendata;
1430}
1431
dc0b027d 1432static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1433{
2ced46c2 1434 struct nfs4_state *newstate;
864472e9
TM		 1435 int ret;
1436
dc0b027d
TM		 1437 opendata->o_arg.open_flags = 0;
1438 opendata->o_arg.fmode = fmode;
2ced46c2
TM		 1439 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1440 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1441 nfs4_init_opendata_res(opendata);
b257957e 1442 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1443 if (ret != 0)
1444 return ret;
2ced46c2 1445 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1446 if (IS_ERR(newstate))
1447 return PTR_ERR(newstate);
643168c2 1448 nfs4_close_state(newstate, fmode);
2ced46c2 1449 *res = newstate;
864472e9
TM		 1450 return 0;
1451}
1452
1453static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1454{
864472e9 1455 struct nfs4_state *newstate;
864472e9
TM		 1456 int ret;
1457
1458 /* memory barrier prior to reading state->n_* */
2ced46c2 1459 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1460 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1461 smp_rmb();
1462 if (state->n_rdwr != 0) {
b0ed9dbc 1463 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2ced46c2 1464 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1465 if (ret != 0)
1466 return ret;
2ced46c2
TM		 1467 if (newstate != state)
1468 return -ESTALE;
864472e9
TM		 1469 }
1470 if (state->n_wronly != 0) {
b0ed9dbc 1471 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2ced46c2 1472 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1473 if (ret != 0)
1474 return ret;
2ced46c2
TM		 1475 if (newstate != state)
1476 return -ESTALE;
864472e9
TM		 1477 }
1478 if (state->n_rdonly != 0) {
b0ed9dbc 1479 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2ced46c2 1480 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1481 if (ret != 0)
1482 return ret;
2ced46c2
TM		 1483 if (newstate != state)
1484 return -ESTALE;
864472e9 1485 }
1ac7e2fd
TM		 1486 /*
1487 * We may have performed cached opens for all three recoveries.
1488 * Check if we need to update the current stateid.
1489 */
1490 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1491 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1492 write_seqlock(&state->seqlock);
1ac7e2fd 1493 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1494 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1495 write_sequnlock(&state->seqlock);
1ac7e2fd 1496 }
864472e9
TM		 1497 return 0;
1498}
1499
1da177e4
LT		 1500/*
1501 * OPEN_RECLAIM:
1502 * reclaim state on the server after a reboot.
1da177e4 1503 */
539cd03a 1504static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1505{
1ac7e2fd 1506 struct nfs_delegation *delegation;
864472e9 1507 struct nfs4_opendata *opendata;
dc0b027d 1508 fmode_t delegation_type = 0;
1da177e4
LT		 1509 int status;
1510
4a1c0893
TM		 1511 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1512 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1513 if (IS_ERR(opendata))
1514 return PTR_ERR(opendata);
1ac7e2fd
TM		 1515 rcu_read_lock();
1516 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1517 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1518 delegation_type = delegation->type;
1ac7e2fd 1519 rcu_read_unlock();
864472e9
TM		 1520 opendata->o_arg.u.delegation_type = delegation_type;
1521 status = nfs4_open_recover(opendata, state);
c6d00e63 1522 nfs4_opendata_put(opendata);
1da177e4
LT		 1523 return status;
1524}
1525
539cd03a 1526static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1527{
1528 struct nfs_server *server = NFS_SERVER(state->inode);
1529 struct nfs4_exception exception = { };
1530 int err;
1531 do {
539cd03a 1532 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1533 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1534 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1535 continue;
168667c4 1536 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1537 break;
1538 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1539 } while (exception.retry);
1540 return err;
1541}
1542
864472e9
TM		 1543static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1544{
1545 struct nfs_open_context *ctx;
1546 int ret;
1547
1548 ctx = nfs4_state_find_open_context(state);
1549 if (IS_ERR(ctx))
91876b13 1550 return -EAGAIN;
539cd03a 1551 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1552 put_nfs_open_context(ctx);
1553 return ret;
1554}
1555
db4f2e63 1556static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1557{
be76b5b6
TM		 1558 switch (err) {
1559 default:
1560 printk(KERN_ERR "NFS: %s: unhandled error "
1561 "%d.\n", __func__, err);
1562 case 0:
1563 case -ENOENT:
1564 case -ESTALE:
1565 break;
1566 case -NFS4ERR_BADSESSION:
1567 case -NFS4ERR_BADSLOT:
1568 case -NFS4ERR_BAD_HIGH_SLOT:
1569 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1570 case -NFS4ERR_DEADSESSION:
1571 set_bit(NFS_DELEGATED_STATE, &state->flags);
1572 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1573 return -EAGAIN;
1574 case -NFS4ERR_STALE_CLIENTID:
1575 case -NFS4ERR_STALE_STATEID:
1576 set_bit(NFS_DELEGATED_STATE, &state->flags);
1577 case -NFS4ERR_EXPIRED:
1578 /* Don't recall a delegation if it was lost */
1579 nfs4_schedule_lease_recovery(server->nfs_client);
1580 return -EAGAIN;
352297b9
CL		 1581 case -NFS4ERR_MOVED:
1582 nfs4_schedule_migration_recovery(server);
1583 return -EAGAIN;
8ef2f8d4
CL		 1584 case -NFS4ERR_LEASE_MOVED:
1585 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1586 return -EAGAIN;
be76b5b6
TM		 1587 case -NFS4ERR_DELEG_REVOKED:
1588 case -NFS4ERR_ADMIN_REVOKED:
1589 case -NFS4ERR_BAD_STATEID:
db4f2e63 1590 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1591 nfs_inode_find_state_and_recover(state->inode,
1592 stateid);
1593 nfs4_schedule_stateid_recovery(server, state);
be76b5b6
TM		 1594 return 0;
1595 case -NFS4ERR_DELAY:
1596 case -NFS4ERR_GRACE:
1597 set_bit(NFS_DELEGATED_STATE, &state->flags);
1598 ssleep(1);
1599 return -EAGAIN;
db4f2e63
TM		 1600 case -ENOMEM:
1601 case -NFS4ERR_DENIED:
1602 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1603 return 0;
be76b5b6 1604 }
1da177e4
LT		 1605 return err;
1606}
1607
db4f2e63
TM		 1608int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1609{
1610 struct nfs_server *server = NFS_SERVER(state->inode);
1611 struct nfs4_opendata *opendata;
1612 int err;
1613
1614 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1615 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1616 if (IS_ERR(opendata))
1617 return PTR_ERR(opendata);
1618 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1619 err = nfs4_open_recover(opendata, state);
1620 nfs4_opendata_put(opendata);
1621 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1622}
1623
be05c860
CL		 1624static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1625{
1626 struct nfs4_opendata *data = calldata;
1627
1628 nfs40_setup_sequence(data->o_arg.server, &data->o_arg.seq_args,
1629 &data->o_res.seq_res, task);
1630}
1631
cdd4e68b
TM		 1632static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1633{
1634 struct nfs4_opendata *data = calldata;
1635
be05c860
CL		 1636 nfs40_sequence_done(task, &data->o_res.seq_res);
1637
cdd4e68b 1638 data->rpc_status = task->tk_status;
26e976a8 1639 if (data->rpc_status == 0) {
f597c537 1640 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1641 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1642 renew_lease(data->o_res.server, data->timestamp);
3e309914 1643 data->rpc_done = 1;
26e976a8 1644 }
cdd4e68b
TM		 1645}
1646
1647static void nfs4_open_confirm_release(void *calldata)
1648{
1649 struct nfs4_opendata *data = calldata;
1650 struct nfs4_state *state = NULL;
1651
1652 /* If this request hasn't been cancelled, do nothing */
1653 if (data->cancelled == 0)
1654 goto out_free;
1655 /* In case of error, no cleanup! */
3e309914 1656 if (!data->rpc_done)
cdd4e68b 1657 goto out_free;
cdd4e68b 1658 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1659 if (!IS_ERR(state))
643168c2 1660 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1661out_free:
c6d00e63 1662 nfs4_opendata_put(data);
cdd4e68b
TM		 1663}
1664
1665static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1666 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1667 .rpc_call_done = nfs4_open_confirm_done,
1668 .rpc_release = nfs4_open_confirm_release,
1669};
1670
1671/*
1672 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1673 */
1674static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1675{
1676 struct nfs_server *server = NFS_SERVER(data->dir->d_inode);
1677 struct rpc_task *task;
5138fde0
TM		 1678 struct rpc_message msg = {
1679 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1680 .rpc_argp = &data->c_arg,
1681 .rpc_resp = &data->c_res,
1682 .rpc_cred = data->owner->so_cred,
1683 };
c970aa85
TM		 1684 struct rpc_task_setup task_setup_data = {
1685 .rpc_client = server->client,
5138fde0 1686 .rpc_message = &msg,
c970aa85
TM		 1687 .callback_ops = &nfs4_open_confirm_ops,
1688 .callback_data = data,
101070ca 1689 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1690 .flags = RPC_TASK_ASYNC,
1691 };
1da177e4
LT		 1692 int status;
1693
be05c860 1694 nfs4_init_sequence(&data->o_arg.seq_args, &data->o_res.seq_res, 1);
c6d00e63 1695 kref_get(&data->kref);
3e309914
TM		 1696 data->rpc_done = 0;
1697 data->rpc_status = 0;
5138fde0 1698 data->timestamp = jiffies;
c970aa85 1699 task = rpc_run_task(&task_setup_data);
7a1218a2 1700 if (IS_ERR(task))
cdd4e68b 1701 return PTR_ERR(task);
cdd4e68b
TM		 1702 status = nfs4_wait_for_completion_rpc_task(task);
1703 if (status != 0) {
1704 data->cancelled = 1;
1705 smp_wmb();
1706 } else
1707 status = data->rpc_status;
e6b3c4db 1708 rpc_put_task(task);
1da177e4
LT		 1709 return status;
1710}
1711
24ac23ab 1712static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1713{
24ac23ab
TM		 1714 struct nfs4_opendata *data = calldata;
1715 struct nfs4_state_owner *sp = data->owner;
549b19cc 1716 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1717
24ac23ab 1718 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1719 goto out_wait;
aac00a8d
TM		 1720 /*
1721 * Check if we still need to send an OPEN call, or if we can use
1722 * a delegation instead.
1723 */
1724 if (data->state != NULL) {
1725 struct nfs_delegation *delegation;
1726
dc0b027d 1727 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1728 goto out_no_action;
aac00a8d
TM		 1729 rcu_read_lock();
1730 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1731 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1732 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1733 can_open_delegated(delegation, data->o_arg.fmode))
1734 goto unlock_no_action;
aac00a8d
TM		 1735 rcu_read_unlock();
1736 }
95b72eb0 1737 /* Update client id. */
549b19cc 1738 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1739 switch (data->o_arg.claim) {
1740 case NFS4_OPEN_CLAIM_PREVIOUS:
1741 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1742 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1743 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1744 case NFS4_OPEN_CLAIM_FH:
1745 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1746 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1747 }
26e976a8 1748 data->timestamp = jiffies;
035168ab 1749 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1750 &data->o_arg.seq_args,
2240a9e2
TM		 1751 &data->o_res.seq_res,
1752 task) != 0)
1753 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1754
1755 /* Set the create mode (note dependency on the session type) */
1756 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1757 if (data->o_arg.open_flags & O_EXCL) {
1758 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1759 if (nfs4_has_persistent_session(clp))
1760 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1761 else if (clp->cl_mvops->minor_version > 0)
1762 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1763 }
6ee41268 1764 return;
652f89f6
TM		 1765unlock_no_action:
1766 rcu_read_unlock();
6ee41268
TM		 1767out_no_action:
1768 task->tk_action = NULL;
c8da19b9 1769out_wait:
b75ad4cd 1770 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1771}
1772
24ac23ab
TM		 1773static void nfs4_open_done(struct rpc_task *task, void *calldata)
1774{
1775 struct nfs4_opendata *data = calldata;
1da177e4 1776
24ac23ab 1777 data->rpc_status = task->tk_status;
d898528c 1778
14516c3a
TM		 1779 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1780 return;
d898528c 1781
24ac23ab 1782 if (task->tk_status == 0) {
807d66d8
TM		 1783 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1784 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1785 case S_IFREG:
1786 break;
1787 case S_IFLNK:
24ac23ab 1788 data->rpc_status = -ELOOP;
6f926b5b
TM		 1789 break;
1790 case S_IFDIR:
24ac23ab 1791 data->rpc_status = -EISDIR;
6f926b5b
TM		 1792 break;
1793 default:
24ac23ab 1794 data->rpc_status = -ENOTDIR;
807d66d8 1795 }
6f926b5b 1796 }
26e976a8 1797 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1798 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1799 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1800 }
3e309914 1801 data->rpc_done = 1;
24ac23ab 1802}
6f926b5b 1803
24ac23ab
TM		 1804static void nfs4_open_release(void *calldata)
1805{
1806 struct nfs4_opendata *data = calldata;
1807 struct nfs4_state *state = NULL;
1808
1809 /* If this request hasn't been cancelled, do nothing */
1810 if (data->cancelled == 0)
1811 goto out_free;
1812 /* In case of error, no cleanup! */
3e309914 1813 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1814 goto out_free;
1815 /* In case we need an open_confirm, no cleanup! */
1816 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1817 goto out_free;
24ac23ab 1818 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1819 if (!IS_ERR(state))
643168c2 1820 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1821out_free:
c6d00e63 1822 nfs4_opendata_put(data);
24ac23ab
TM		 1823}
1824
1825static const struct rpc_call_ops nfs4_open_ops = {
1826 .rpc_call_prepare = nfs4_open_prepare,
1827 .rpc_call_done = nfs4_open_done,
1828 .rpc_release = nfs4_open_release,
1829};
1830
b257957e 1831static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab
TM		 1832{
1833 struct inode *dir = data->dir->d_inode;
1834 struct nfs_server *server = NFS_SERVER(dir);
1835 struct nfs_openargs *o_arg = &data->o_arg;
1836 struct nfs_openres *o_res = &data->o_res;
1837 struct rpc_task *task;
5138fde0
TM		 1838 struct rpc_message msg = {
1839 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1840 .rpc_argp = o_arg,
1841 .rpc_resp = o_res,
1842 .rpc_cred = data->owner->so_cred,
1843 };
c970aa85
TM		 1844 struct rpc_task_setup task_setup_data = {
1845 .rpc_client = server->client,
5138fde0 1846 .rpc_message = &msg,
c970aa85
TM		 1847 .callback_ops = &nfs4_open_ops,
1848 .callback_data = data,
101070ca 1849 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1850 .flags = RPC_TASK_ASYNC,
1851 };
24ac23ab
TM		 1852 int status;
1853
a9c92d6b 1854 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1855 kref_get(&data->kref);
3e309914
TM		 1856 data->rpc_done = 0;
1857 data->rpc_status = 0;
2ced46c2 1858 data->cancelled = 0;
bdeca1b7
TM		 1859 data->is_recover = 0;
1860 if (isrecover) {
8fe72bac 1861 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 1862 data->is_recover = 1;
1863 }
c970aa85 1864 task = rpc_run_task(&task_setup_data);
b257957e
AB		 1865 if (IS_ERR(task))
1866 return PTR_ERR(task);
1867 status = nfs4_wait_for_completion_rpc_task(task);
1868 if (status != 0) {
1869 data->cancelled = 1;
1870 smp_wmb();
1871 } else
1872 status = data->rpc_status;
1873 rpc_put_task(task);
1874
1875 return status;
1876}
1877
1878static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
1879{
1880 struct inode *dir = data->dir->d_inode;
1881 struct nfs_openres *o_res = &data->o_res;
1882 int status;
1883
1884 status = nfs4_run_open_task(data, 1);
1885 if (status != 0 || !data->rpc_done)
1886 return status;
1887
6926afd1
TM		 1888 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
1889
b257957e
AB		 1890 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
1891 status = _nfs4_proc_open_confirm(data);
1892 if (status != 0)
1893 return status;
1894 }
1895
1896 return status;
1897}
1898
6168f62c
WAA		 1899static int nfs4_opendata_access(struct rpc_cred *cred,
1900 struct nfs4_opendata *opendata,
f8d9a897
WAA		 1901 struct nfs4_state *state, fmode_t fmode,
1902 int openflags)
6168f62c
WAA		 1903{
1904 struct nfs_access_entry cache;
1905 u32 mask;
1906
1907 /* access call failed or for some reason the server doesn't
1908 * support any access modes -- defer access call until later */
1909 if (opendata->o_res.access_supported == 0)
1910 return 0;
1911
1912 mask = 0;
bbd3a8ee 1913 /* don't check MAY_WRITE - a newly created file may not have
f8d9a897
WAA		 1914 * write mode bits, but POSIX allows the creating process to write.
1915 * use openflags to check for exec, because fmode won't
1916 * always have FMODE_EXEC set when file open for exec. */
1917 if (openflags & __FMODE_EXEC) {
1918 /* ONLY check for exec rights */
1919 mask = MAY_EXEC;
1920 } else if (fmode & FMODE_READ)
1921 mask = MAY_READ;
6168f62c
WAA		 1922
1923 cache.cred = cred;
1924 cache.jiffies = jiffies;
1925 nfs_access_set_mask(&cache, opendata->o_res.access_result);
1926 nfs_access_add_cache(state->inode, &cache);
1927
bbd3a8ee 1928 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 1929 return 0;
1930
1931 /* even though OPEN succeeded, access is denied. Close the file */
1932 nfs4_close_state(state, fmode);
998f40b5 1933 return -EACCES;
6168f62c
WAA		 1934}
1935
b257957e
AB		 1936/*
1937 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1938 */
1939static int _nfs4_proc_open(struct nfs4_opendata *data)
1940{
1941 struct inode *dir = data->dir->d_inode;
1942 struct nfs_server *server = NFS_SERVER(dir);
1943 struct nfs_openargs *o_arg = &data->o_arg;
1944 struct nfs_openres *o_res = &data->o_res;
1945 int status;
1946
1947 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 1948 if (!data->rpc_done)
1949 return status;
1950 if (status != 0) {
1951 if (status == -NFS4ERR_BADNAME &&
1952 !(o_arg->open_flags & O_CREAT))
1953 return -ENOENT;
24ac23ab 1954 return status;
08ef7bd3 1955 }
24ac23ab 1956
6926afd1
TM		 1957 nfs_fattr_map_and_free_names(server, &data->f_attr);
1958
5bc2afc2 1959 if (o_arg->open_flags & O_CREAT) {
56ae19f3 1960 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 1961 if (o_arg->open_flags & O_EXCL)
1962 data->file_created = 1;
1963 else if (o_res->cinfo.before != o_res->cinfo.after)
1964 data->file_created = 1;
1965 }
0df5dd4a
TM		 1966 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
1967 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 1968 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 1969 status = _nfs4_proc_open_confirm(data);
1da177e4 1970 if (status != 0)
24ac23ab 1971 return status;
1da177e4
LT		 1972 }
1973 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
1775fd3e 1974 _nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 1975 return 0;
1da177e4
LT		 1976}
1977
d83217c1
AA		 1978static int nfs4_recover_expired_lease(struct nfs_server *server)
1979{
1980 return nfs4_client_recover_expired_lease(server->nfs_client);
1981}
1982
1da177e4
LT		 1983/*
1984 * OPEN_EXPIRED:
1985 * reclaim state on the server after a network partition.
1986 * Assumes caller holds the appropriate lock
1987 */
539cd03a 1988static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1989{
e56e0b78 1990 struct nfs4_opendata *opendata;
864472e9 1991 int ret;
1da177e4 1992
4a1c0893 1993 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 1994 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 1995 if (IS_ERR(opendata))
1996 return PTR_ERR(opendata);
864472e9 1997 ret = nfs4_open_recover(opendata, state);
35d05778 1998 if (ret == -ESTALE)
3d4ff43d 1999 d_drop(ctx->dentry);
c6d00e63 2000 nfs4_opendata_put(opendata);
864472e9 2001 return ret;
1da177e4
LT		 2002}
2003
a9ed2e25 2004static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2005{
539cd03a 2006 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2007 struct nfs4_exception exception = { };
2008 int err;
2009
2010 do {
539cd03a 2011 err = _nfs4_open_expired(ctx, state);
42113a75 2012 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2013 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2014 continue;
a9ed2e25
TM		 2015 switch (err) {
2016 default:
2017 goto out;
2018 case -NFS4ERR_GRACE:
2019 case -NFS4ERR_DELAY:
2020 nfs4_handle_exception(server, err, &exception);
2021 err = 0;
2022 }
202b50dc 2023 } while (exception.retry);
a9ed2e25 2024out:
202b50dc
TM		 2025 return err;
2026}
2027
1da177e4
LT		 2028static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2029{
1da177e4 2030 struct nfs_open_context *ctx;
864472e9 2031 int ret;
1da177e4 2032
864472e9
TM		 2033 ctx = nfs4_state_find_open_context(state);
2034 if (IS_ERR(ctx))
91876b13 2035 return -EAGAIN;
539cd03a 2036 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2037 put_nfs_open_context(ctx);
2038 return ret;
1da177e4
LT		 2039}
2040
f062eb6c 2041#if defined(CONFIG_NFS_V4_1)
3e60ffdd 2042static void nfs41_clear_delegation_stateid(struct nfs4_state *state)
f062eb6c 2043{
f062eb6c 2044 struct nfs_server *server = NFS_SERVER(state->inode);
3e60ffdd 2045 nfs4_stateid *stateid = &state->stateid;
ab7cb0df
TM		 2046 struct nfs_delegation *delegation;
2047 struct rpc_cred *cred = NULL;
2048 int status = -NFS4ERR_BAD_STATEID;
3e60ffdd
CL		 2049
2050 /* If a state reset has been done, test_stateid is unneeded */
2051 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
2052 return;
2053
ab7cb0df
TM		 2054 /* Get the delegation credential for use by test/free_stateid */
2055 rcu_read_lock();
2056 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
2057 if (delegation != NULL &&
2058 nfs4_stateid_match(&delegation->stateid, stateid)) {
2059 cred = get_rpccred(delegation->cred);
2060 rcu_read_unlock();
2061 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2062 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df
TM		 2063 } else
2064 rcu_read_unlock();
2065
3e60ffdd
CL		 2066 if (status != NFS_OK) {
2067 /* Free the stateid unless the server explicitly
2068 * informs us the stateid is unrecognized. */
2069 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2070 nfs41_free_stateid(server, stateid, cred);
6938867e 2071 nfs_remove_bad_delegation(state->inode);
3e60ffdd 2072
6938867e
BS		 2073 write_seqlock(&state->seqlock);
2074 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2075 write_sequnlock(&state->seqlock);
3e60ffdd
CL		 2076 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2077 }
ab7cb0df
TM		 2078
2079 if (cred != NULL)
2080 put_rpccred(cred);
3e60ffdd
CL		 2081}
2082
2083/**
2084 * nfs41_check_open_stateid - possibly free an open stateid
2085 *
2086 * @state: NFSv4 state for an inode
2087 *
2088 * Returns NFS_OK if recovery for this stateid is now finished.
2089 * Otherwise a negative NFS4ERR value is returned.
2090 */
2091static int nfs41_check_open_stateid(struct nfs4_state *state)
2092{
2093 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2094 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2095 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2096 int status;
2097
2098 /* If a state reset has been done, test_stateid is unneeded */
2099 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2100 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2101 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2102 return -NFS4ERR_BAD_STATEID;
2103
ab7cb0df 2104 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2105 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2106 if (status != NFS_OK) {
2107 /* Free the stateid unless the server explicitly
2108 * informs us the stateid is unrecognized. */
2109 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2110 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2111
2112 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2113 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2114 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2115 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2116 }
2117 return status;
2118}
2119
2120static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2121{
eb64cf96 2122 int status;
b01dd1d8 2123
3e60ffdd
CL		 2124 nfs41_clear_delegation_stateid(state);
2125 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2126 if (status != NFS_OK)
2127 status = nfs4_open_expired(sp, state);
2128 return status;
f062eb6c
BS		 2129}
2130#endif
2131
aa53ed54
JL		 2132/*
2133 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2134 * fields corresponding to attributes that were used to store the verifier.
2135 * Make sure we clobber those fields in the later setattr call
2136 */
2137static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2138{
2139 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2140 !(sattr->ia_valid & ATTR_ATIME_SET))
2141 sattr->ia_valid |= ATTR_ATIME;
2142
2143 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2144 !(sattr->ia_valid & ATTR_MTIME_SET))
2145 sattr->ia_valid |= ATTR_MTIME;
2146}
2147
c21443c2
TM		 2148static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2149 fmode_t fmode,
2150 int flags,
3efb9722 2151 struct nfs_open_context *ctx)
c21443c2
TM		 2152{
2153 struct nfs4_state_owner *sp = opendata->owner;
2154 struct nfs_server *server = sp->so_server;
275bb307 2155 struct dentry *dentry;
c21443c2
TM		 2156 struct nfs4_state *state;
2157 unsigned int seq;
2158 int ret;
2159
2160 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2161
2162 ret = _nfs4_proc_open(opendata);
2163 if (ret != 0)
2164 goto out;
2165
2166 state = nfs4_opendata_to_nfs4_state(opendata);
2167 ret = PTR_ERR(state);
2168 if (IS_ERR(state))
2169 goto out;
2170 if (server->caps & NFS_CAP_POSIX_LOCK)
2171 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2172
275bb307
TM		 2173 dentry = opendata->dentry;
2174 if (dentry->d_inode == NULL) {
2175 /* FIXME: Is this d_drop() ever needed? */
2176 d_drop(dentry);
2177 dentry = d_add_unique(dentry, igrab(state->inode));
2178 if (dentry == NULL) {
2179 dentry = opendata->dentry;
2180 } else if (dentry != ctx->dentry) {
2181 dput(ctx->dentry);
2182 ctx->dentry = dget(dentry);
2183 }
2184 nfs_set_verifier(dentry,
2185 nfs_save_change_attribute(opendata->dir->d_inode));
2186 }
2187
c21443c2
TM		 2188 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2189 if (ret != 0)
2190 goto out;
2191
3efb9722 2192 ctx->state = state;
c45ffdd2
TM		 2193 if (dentry->d_inode == state->inode) {
2194 nfs_inode_attach_open_context(ctx);
2195 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2196 nfs4_schedule_stateid_recovery(server, state);
2197 }
c21443c2
TM		 2198out:
2199 return ret;
2200}
2201
1da177e4 2202/*
24ac23ab 2203 * Returns a referenced nfs4_state
1da177e4 2204 */
82be417a 2205static int _nfs4_do_open(struct inode *dir,
4197a055 2206 struct nfs_open_context *ctx,
82be417a
AA		 2207 int flags,
2208 struct iattr *sattr,
5bc2afc2
TM		 2209 struct nfs4_label *label,
2210 int *opened)
1da177e4
LT		 2211{
2212 struct nfs4_state_owner *sp;
2213 struct nfs4_state *state = NULL;
2214 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2215 struct nfs4_opendata *opendata;
4197a055
TM		 2216 struct dentry *dentry = ctx->dentry;
2217 struct rpc_cred *cred = ctx->cred;
2218 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2219 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2220 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2221 struct nfs4_label *olabel = NULL;
aac00a8d 2222 int status;
1da177e4
LT		 2223
2224 /* Protect against reboot recovery conflicts */
1da177e4 2225 status = -ENOMEM;
d1e284d5
TM		 2226 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2227 if (sp == NULL) {
1da177e4
LT		 2228 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2229 goto out_err;
2230 }
58d9714a
TM		 2231 status = nfs4_recover_expired_lease(server);
2232 if (status != 0)
b4454fe1 2233 goto err_put_state_owner;
82a2c1b7
AV		 2234 if (dentry->d_inode != NULL)
2235 nfs4_return_incompatible_delegation(dentry->d_inode, fmode);
58d9714a 2236 status = -ENOMEM;
49f9a0fa
TM		 2237 if (dentry->d_inode)
2238 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2239 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2240 label, claim, GFP_KERNEL);
e56e0b78 2241 if (opendata == NULL)
95d35cb4 2242 goto err_put_state_owner;
1da177e4 2243
14c43f76
DQ		 2244 if (label) {
2245 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2246 if (IS_ERR(olabel)) {
2247 status = PTR_ERR(olabel);
2248 goto err_opendata_put;
2249 }
2250 }
2251
82be417a
AA		 2252 if (ctx_th && server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2253 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2254 if (!opendata->f_attr.mdsthreshold)
14c43f76 2255 goto err_free_label;
1549210f 2256 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2257 }
82a2c1b7
AV		 2258 if (dentry->d_inode != NULL)
2259 opendata->state = nfs4_get_open_state(dentry->d_inode, sp);
aac00a8d 2260
3efb9722 2261 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2262 if (status != 0)
14c43f76 2263 goto err_free_label;
3efb9722 2264 state = ctx->state;
6168f62c 2265
549b19cc
TM		 2266 if ((opendata->o_arg.open_flags & O_EXCL) &&
2267 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2268 nfs4_exclusive_attrset(opendata, sattr);
2269
2270 nfs_fattr_init(opendata->o_res.f_attr);
2271 status = nfs4_do_setattr(state->inode, cred,
2272 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2273 state, label, olabel);
2274 if (status == 0) {
0ab64e0e 2275 nfs_setattr_update_inode(state->inode, sattr);
1775fd3e 2276 nfs_post_op_update_inode(state->inode, opendata->o_res.f_attr);
aa9c2669 2277 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2278 }
0ab64e0e 2279 }
5bc2afc2
TM		 2280 if (opendata->file_created)
2281 *opened |= FILE_CREATED;
82be417a
AA		 2282
2283 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server))
2284 *ctx_th = opendata->f_attr.mdsthreshold;
2285 else
2286 kfree(opendata->f_attr.mdsthreshold);
2287 opendata->f_attr.mdsthreshold = NULL;
2288
14c43f76
DQ		 2289 nfs4_label_free(olabel);
2290
c6d00e63 2291 nfs4_opendata_put(opendata);
1da177e4 2292 nfs4_put_state_owner(sp);
1da177e4 2293 return 0;
14c43f76
DQ		 2294err_free_label:
2295 nfs4_label_free(olabel);
c6d00e63 2296err_opendata_put:
82be417a 2297 kfree(opendata->f_attr.mdsthreshold);
c6d00e63 2298 nfs4_opendata_put(opendata);
e56e0b78
TM		 2299err_put_state_owner:
2300 nfs4_put_state_owner(sp);
1da177e4 2301out_err:
1da177e4
LT		 2302 return status;
2303}
2304
2305
82be417a 2306static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2307 struct nfs_open_context *ctx,
82be417a
AA		 2308 int flags,
2309 struct iattr *sattr,
5bc2afc2
TM		 2310 struct nfs4_label *label,
2311 int *opened)
1da177e4 2312{
49f9a0fa 2313 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2314 struct nfs4_exception exception = { };
2315 struct nfs4_state *res;
2316 int status;
2317
2318 do {
5bc2afc2 2319 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2320 res = ctx->state;
42113a75 2321 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2322 if (status == 0)
2323 break;
2324 /* NOTE: BAD_SEQID means the server and client disagree about the
2325 * book-keeping w.r.t. state-changing operations
2326 * (OPEN/CLOSE/LOCK/LOCKU...)
2327 * It is actually a sign of a bug on the client or on the server.
2328 *
2329 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2330 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2331 * have unhashed the old state_owner for us, and that we can
2332 * therefore safely retry using a new one. We should still warn
2333 * the user though...
2334 */
2335 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2336 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2337 " returned a bad sequence-id error!\n",
2338 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2339 exception.retry = 1;
2340 continue;
2341 }
550f5747
TM		 2342 /*
2343 * BAD_STATEID on OPEN means that the server cancelled our
2344 * state before it received the OPEN_CONFIRM.
2345 * Recover by retrying the request as per the discussion
2346 * on Page 181 of RFC3530.
2347 */
2348 if (status == -NFS4ERR_BAD_STATEID) {
2349 exception.retry = 1;
2350 continue;
2351 }
aac00a8d
TM		 2352 if (status == -EAGAIN) {
2353 /* We must have found a delegation */
2354 exception.retry = 1;
2355 continue;
2356 }
49f9a0fa
TM		 2357 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2358 continue;
2359 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2360 status, &exception));
2361 } while (exception.retry);
2362 return res;
2363}
2364
659bfcd6
TM		 2365static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2366 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2367 struct nfs4_state *state, struct nfs4_label *ilabel,
2368 struct nfs4_label *olabel)
1da177e4 2369{
3e4f6290 2370 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2371 struct nfs_setattrargs arg = {
3e4f6290 2372 .fh = NFS_FH(inode),
1da177e4
LT		 2373 .iap = sattr,
2374 .server = server,
2375 .bitmask = server->attr_bitmask,
1775fd3e 2376 .label = ilabel,
1da177e4
LT		 2377 };
2378 struct nfs_setattrres res = {
2379 .fattr = fattr,
1775fd3e 2380 .label = olabel,
1da177e4
LT		 2381 .server = server,
2382 };
2383 struct rpc_message msg = {
659bfcd6
TM		 2384 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2385 .rpc_argp = &arg,
2386 .rpc_resp = &res,
2387 .rpc_cred = cred,
1da177e4 2388 };
26e976a8 2389 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2390 fmode_t fmode;
2391 bool truncate;
65e4308d 2392 int status;
1da177e4 2393
aa9c2669
DQ		 2394 arg.bitmask = nfs4_bitmask(server, ilabel);
2395 if (ilabel)
2396 arg.bitmask = nfs4_bitmask(server, olabel);
2397
0e574af1 2398 nfs_fattr_init(fattr);
1da177e4 2399
ee3ae84e
TM		 2400 /* Servers should only apply open mode checks for file size changes */
2401 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2402 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2403
2404 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2405 /* Use that stateid */
2406 } else if (truncate && state != NULL && nfs4_valid_open_stateid(state)) {
2a369153
TM		 2407 struct nfs_lockowner lockowner = {
2408 .l_owner = current->files,
2409 .l_pid = current->tgid,
2410 };
4fc8796d 2411 nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2a369153 2412 &lockowner);
08e9eac4 2413 } else
f597c537 2414 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2415
7c513058 2416 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2417 if (status == 0 && state != NULL)
2418 renew_lease(server, timestamp);
65e4308d 2419 return status;
1da177e4
LT		 2420}
2421
659bfcd6
TM		 2422static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2423 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2424 struct nfs4_state *state, struct nfs4_label *ilabel,
2425 struct nfs4_label *olabel)
1da177e4 2426{
3e4f6290 2427 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2428 struct nfs4_exception exception = {
2429 .state = state,
3114ea7a 2430 .inode = inode,
a1d0b5ee 2431 };
1da177e4
LT		 2432 int err;
2433 do {
1775fd3e 2434 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2435 trace_nfs4_setattr(inode, err);
451146be
TM		 2436 switch (err) {
2437 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2438 if (!(sattr->ia_valid & ATTR_SIZE)) {
2439 pr_warn_once("NFSv4: server %s is incorrectly "
2440 "applying open mode checks to "
2441 "a SETATTR that is not "
2442 "changing file size.\n",
2443 server->nfs_client->cl_hostname);
2444 }
451146be
TM		 2445 if (state && !(state->state & FMODE_WRITE)) {
2446 err = -EBADF;
2447 if (sattr->ia_valid & ATTR_OPEN)
2448 err = -EACCES;
2449 goto out;
2450 }
2451 }
2452 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2453 } while (exception.retry);
451146be 2454out:
1da177e4
LT		 2455 return err;
2456}
2457
2458struct nfs4_closedata {
2459 struct inode *inode;
2460 struct nfs4_state *state;
2461 struct nfs_closeargs arg;
2462 struct nfs_closeres res;
516a6af6 2463 struct nfs_fattr fattr;
26e976a8 2464 unsigned long timestamp;
f7e8917a
FI		 2465 bool roc;
2466 u32 roc_barrier;
1da177e4
LT		 2467};
2468
963d8fe5 2469static void nfs4_free_closedata(void *data)
9512135d 2470{
963d8fe5
TM		 2471 struct nfs4_closedata *calldata = data;
2472 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2473 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2474
f7e8917a
FI		 2475 if (calldata->roc)
2476 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2477 nfs4_put_open_state(calldata->state);
2478 nfs_free_seqid(calldata->arg.seqid);
9512135d 2479 nfs4_put_state_owner(sp);
322b2b90 2480 nfs_sb_deactive(sb);
9512135d
TM		 2481 kfree(calldata);
2482}
2483
88069f77
TM		 2484static void nfs4_close_clear_stateid_flags(struct nfs4_state *state,
2485 fmode_t fmode)
2486{
2487 spin_lock(&state->owner->so_lock);
fd068b20
TM		 2488 clear_bit(NFS_O_RDWR_STATE, &state->flags);
2489 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
2490 case FMODE_WRITE:
88069f77 2491 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
fd068b20
TM		 2492 break;
2493 case FMODE_READ:
88069f77 2494 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
fd068b20
TM		 2495 break;
2496 case 0:
2497 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2498 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2499 clear_bit(NFS_OPEN_STATE, &state->flags);
2500 }
88069f77
TM		 2501 spin_unlock(&state->owner->so_lock);
2502}
2503
963d8fe5 2504static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2505{
963d8fe5 2506 struct nfs4_closedata *calldata = data;
1da177e4 2507 struct nfs4_state *state = calldata->state;
1da177e4
LT		 2508 struct nfs_server *server = NFS_SERVER(calldata->inode);
2509
a3ca5651 2510 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2511 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2512 return;
42113a75 2513 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2514 /* hmm. we are done with the inode, and in the process of freeing
2515 * the state_owner. we keep this around to process errors
2516 */
1da177e4
LT		 2517 switch (task->tk_status) {
2518 case 0:
f7e8917a
FI		 2519 if (calldata->roc)
2520 pnfs_roc_set_barrier(state->inode,
2521 calldata->roc_barrier);
45328c35 2522 nfs_set_open_stateid(state, &calldata->res.stateid, 0);
26e976a8 2523 renew_lease(server, calldata->timestamp);
88069f77
TM		 2524 nfs4_close_clear_stateid_flags(state,
2525 calldata->arg.fmode);
1da177e4
LT		 2526 break;
2527 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2528 case -NFS4ERR_OLD_STATEID:
2529 case -NFS4ERR_BAD_STATEID:
1da177e4 2530 case -NFS4ERR_EXPIRED:
dc0b027d 2531 if (calldata->arg.fmode == 0)
9e33bed5 2532 break;
1da177e4 2533 default:
72211dbe
TM		 2534 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
2535 rpc_restart_call_prepare(task);
1da177e4 2536 }
72211dbe 2537 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2538 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2539 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2540}
2541
4ce70ada 2542static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2543{
4ce70ada 2544 struct nfs4_closedata *calldata = data;
9512135d 2545 struct nfs4_state *state = calldata->state;
7fdab069 2546 struct inode *inode = calldata->inode;
88069f77 2547 int call_close = 0;
9512135d 2548
a3ca5651 2549 dprintk("%s: begin!\n", __func__);
963d8fe5 2550 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2551 goto out_wait;
003707c7 2552
88069f77
TM		 2553 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
2554 calldata->arg.fmode = FMODE_READ|FMODE_WRITE;
4cecb76f 2555 spin_lock(&state->owner->so_lock);
003707c7 2556 /* Calculate the change in open mode */
e7616923 2557 if (state->n_rdwr == 0) {
003707c7 2558 if (state->n_rdonly == 0) {
88069f77
TM		 2559 call_close |= test_bit(NFS_O_RDONLY_STATE, &state->flags);
2560 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2561 calldata->arg.fmode &= ~FMODE_READ;
003707c7
TM		 2562 }
2563 if (state->n_wronly == 0) {
88069f77
TM		 2564 call_close |= test_bit(NFS_O_WRONLY_STATE, &state->flags);
2565 call_close |= test_bit(NFS_O_RDWR_STATE, &state->flags);
2566 calldata->arg.fmode &= ~FMODE_WRITE;
003707c7 2567 }
e7616923 2568 }
5d422301
TM		 2569 if (!nfs4_valid_open_stateid(state))
2570 call_close = 0;
4cecb76f 2571 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2572
2573 if (!call_close) {
963d8fe5 2574 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2575 goto out_no_action;
9512135d 2576 }
88069f77 2577
f7e8917a 2578 if (calldata->arg.fmode == 0) {
88069f77 2579 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2580 if (calldata->roc &&
b9536ad5
AA		 2581 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2582 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2583 goto out_wait;
b9536ad5 2584 }
f7e8917a 2585 }
88069f77 2586
516a6af6 2587 nfs_fattr_init(calldata->res.fattr);
26e976a8 2588 calldata->timestamp = jiffies;
7fdab069 2589 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2590 &calldata->arg.seq_args,
2591 &calldata->res.seq_res,
2240a9e2
TM		 2592 task) != 0)
2593 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2594 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2595 return;
2596out_no_action:
2597 task->tk_action = NULL;
2598out_wait:
2599 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2600}
2601
963d8fe5 2602static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2603 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2604 .rpc_call_done = nfs4_close_done,
2605 .rpc_release = nfs4_free_closedata,
2606};
2607
1da177e4
LT		 2608/*
2609 * It is possible for data to be read/written from a mem-mapped file
2610 * after the sys_close call (which hits the vfs layer as a flush).
2611 * This means that we can't safely call nfsv4 close on a file until
2612 * the inode is cleared. This in turn means that we are not good
2613 * NFSv4 citizens - we do not indicate to the server to update the file's
2614 * share state even when we are done with one of the three share
2615 * stateid's in the inode.
2616 *
2617 * NOTE: Caller must be holding the sp->so_owner semaphore!
2618 */
1f7977c1 2619int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2620{
4a35bd41 2621 struct nfs_server *server = NFS_SERVER(state->inode);
1da177e4 2622 struct nfs4_closedata *calldata;
b39e625b
TM		 2623 struct nfs4_state_owner *sp = state->owner;
2624 struct rpc_task *task;
5138fde0
TM		 2625 struct rpc_message msg = {
2626 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2627 .rpc_cred = state->owner->so_cred,
2628 };
c970aa85
TM		 2629 struct rpc_task_setup task_setup_data = {
2630 .rpc_client = server->client,
5138fde0 2631 .rpc_message = &msg,
c970aa85 2632 .callback_ops = &nfs4_close_ops,
101070ca 2633 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2634 .flags = RPC_TASK_ASYNC,
2635 };
9512135d 2636 int status = -ENOMEM;
1da177e4 2637
fa940720
WAA		 2638 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2639 &task_setup_data.rpc_client, &msg);
2640
8535b2be 2641 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2642 if (calldata == NULL)
9512135d 2643 goto out;
a9c92d6b 2644 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2645 calldata->inode = state->inode;
1da177e4 2646 calldata->state = state;
4a35bd41 2647 calldata->arg.fh = NFS_FH(state->inode);
003707c7 2648 calldata->arg.stateid = &state->open_stateid;
1da177e4 2649 /* Serialization for the sequence id */
8535b2be 2650 calldata->arg.seqid = nfs_alloc_seqid(&state->owner->so_seqid, gfp_mask);
9512135d
TM		 2651 if (calldata->arg.seqid == NULL)
2652 goto out_free_calldata;
dc0b027d 2653 calldata->arg.fmode = 0;
a65318bf 2654 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2655 calldata->res.fattr = &calldata->fattr;
c1d51931 2656 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2657 calldata->res.server = server;
1f7977c1 2658 calldata->roc = pnfs_roc(state->inode);
643168c2 2659 nfs_sb_active(calldata->inode->i_sb);
9512135d 2660
1174dd1f
TM		 2661 msg.rpc_argp = &calldata->arg;
2662 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2663 task_setup_data.callback_data = calldata;
2664 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2665 if (IS_ERR(task))
2666 return PTR_ERR(task);
a49c3c77
TM		 2667 status = 0;
2668 if (wait)
2669 status = rpc_wait_for_completion_task(task);
b39e625b 2670 rpc_put_task(task);
a49c3c77 2671 return status;
9512135d
TM		 2672out_free_calldata:
2673 kfree(calldata);
2674out:
b39e625b
TM		 2675 nfs4_put_open_state(state);
2676 nfs4_put_state_owner(sp);
9512135d 2677 return status;
1da177e4
LT		 2678}
2679
2b484297 2680static struct inode *
5bc2afc2
TM		 2681nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2682 int open_flags, struct iattr *attr, int *opened)
1da177e4 2683{
1da177e4 2684 struct nfs4_state *state;
aa9c2669
DQ		 2685 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2686
2687 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2688
565277f6 2689 /* Protect against concurrent sillydeletes */
5bc2afc2 2690 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2691
2692 nfs4_label_release_security(label);
2693
f46e0bd3
TM		 2694 if (IS_ERR(state))
2695 return ERR_CAST(state);
275bb307 2696 return state->inode;
1da177e4
LT		 2697}
2698
1185a552 2699static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2700{
2701 if (ctx->state == NULL)
2702 return;
2703 if (is_sync)
643168c2 2704 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2705 else
643168c2 2706 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2707}
1da177e4
LT		 2708
2709static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2710{
43652ad5
BH		 2711 struct nfs4_server_caps_arg args = {
2712 .fhandle = fhandle,
2713 };
1da177e4
LT		 2714 struct nfs4_server_caps_res res = {};
2715 struct rpc_message msg = {
2716 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2717 .rpc_argp = &args,
1da177e4
LT		 2718 .rpc_resp = &res,
2719 };
2720 int status;
2721
7c513058 2722 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2723 if (status == 0) {
2724 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2725 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2726 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2727 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2728 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
2729 NFS_CAP_CTIME|NFS_CAP_MTIME);
1da177e4
LT		 2730 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL)
2731 server->caps |= NFS_CAP_ACLS;
2732 if (res.has_links != 0)
2733 server->caps |= NFS_CAP_HARDLINKS;
2734 if (res.has_symlinks != 0)
2735 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2736 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2737 server->caps |= NFS_CAP_FILEID;
2738 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2739 server->caps |= NFS_CAP_MODE;
2740 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2741 server->caps |= NFS_CAP_NLINK;
2742 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2743 server->caps |= NFS_CAP_OWNER;
2744 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2745 server->caps |= NFS_CAP_OWNER_GROUP;
2746 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2747 server->caps |= NFS_CAP_ATIME;
2748 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2749 server->caps |= NFS_CAP_CTIME;
2750 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2751 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2752#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2753 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2754 server->caps |= NFS_CAP_SECURITY_LABEL;
2755#endif
2756 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2757 sizeof(server->attr_bitmask));
62ab460c 2758
aa9c2669
DQ		 2759 if (server->caps & NFS_CAP_SECURITY_LABEL) {
2760 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2761 res.attr_bitmask[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
2762 }
a65318bf
TM		 2763 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2764 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2765 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
1da177e4 2766 server->acl_bitmask = res.acl_bitmask;
264e6351 2767 server->fh_expire_type = res.fh_expire_type;
1da177e4 2768 }
cccef3b9 2769
1da177e4
LT		 2770 return status;
2771}
2772
55a97593 2773int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2774{
2775 struct nfs4_exception exception = { };
2776 int err;
2777 do {
2778 err = nfs4_handle_exception(server,
2779 _nfs4_server_capabilities(server, fhandle),
2780 &exception);
2781 } while (exception.retry);
2782 return err;
2783}
2784
2785static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2786 struct nfs_fsinfo *info)
2787{
aa9c2669 2788 u32 bitmask[3];
1da177e4 2789 struct nfs4_lookup_root_arg args = {
aa9c2669 2790 .bitmask = bitmask,
1da177e4
LT		 2791 };
2792 struct nfs4_lookup_res res = {
2793 .server = server,
0e574af1 2794 .fattr = info->fattr,
1da177e4
LT		 2795 .fh = fhandle,
2796 };
2797 struct rpc_message msg = {
2798 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2799 .rpc_argp = &args,
2800 .rpc_resp = &res,
2801 };
008f55d0 2802
aa9c2669
DQ		 2803 bitmask[0] = nfs4_fattr_bitmap[0];
2804 bitmask[1] = nfs4_fattr_bitmap[1];
2805 /*
2806 * Process the label in the upcoming getfattr
2807 */
2808 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2809
0e574af1 2810 nfs_fattr_init(info->fattr);
7c513058 2811 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2812}
2813
2814static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2815 struct nfs_fsinfo *info)
2816{
2817 struct nfs4_exception exception = { };
2818 int err;
2819 do {
fb8a5ba8 2820 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 2821 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 2822 switch (err) {
2823 case 0:
2824 case -NFS4ERR_WRONGSEC:
05e9cfb4 2825 goto out;
fb8a5ba8
BS		 2826 default:
2827 err = nfs4_handle_exception(server, err, &exception);
2828 }
1da177e4 2829 } while (exception.retry);
05e9cfb4 2830out:
1da177e4
LT		 2831 return err;
2832}
2833
8f70e95f
BS		 2834static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
2835 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
2836{
c2190661
TM		 2837 struct rpc_auth_create_args auth_args = {
2838 .pseudoflavor = flavor,
2839 };
8f70e95f
BS		 2840 struct rpc_auth *auth;
2841 int ret;
2842
c2190661 2843 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 2844 if (IS_ERR(auth)) {
75bc8821 2845 ret = -EACCES;
8f70e95f
BS		 2846 goto out;
2847 }
2848 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 2849out:
2850 return ret;
2851}
2852
9a744ba3
CL		 2853/*
2854 * Retry pseudoroot lookup with various security flavors. We do this when:
2855 *
2856 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
2857 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
2858 *
2859 * Returns zero on success, or a negative NFS4ERR value, or a
2860 * negative errno value.
2861 */
801a16dc 2862static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 2863 struct nfs_fsinfo *info)
1da177e4 2864{
9a744ba3
CL		 2865 /* Per 3530bis 15.33.5 */
2866 static const rpc_authflavor_t flav_array[] = {
2867 RPC_AUTH_GSS_KRB5P,
2868 RPC_AUTH_GSS_KRB5I,
2869 RPC_AUTH_GSS_KRB5,
c4eafe11 2870 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 2871 RPC_AUTH_NULL,
2872 };
2873 int status = -EPERM;
2874 size_t i;
6a1a1e34 2875
4d4b69dd
WAA		 2876 if (server->auth_info.flavor_len > 0) {
2877 /* try each flavor specified by user */
2878 for (i = 0; i < server->auth_info.flavor_len; i++) {
2879 status = nfs4_lookup_root_sec(server, fhandle, info,
2880 server->auth_info.flavors[i]);
2881 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2882 continue;
2883 break;
2884 }
2885 } else {
2886 /* no flavors specified by user, try default list */
2887 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
2888 status = nfs4_lookup_root_sec(server, fhandle, info,
2889 flav_array[i]);
2890 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
2891 continue;
2892 break;
2893 }
8f70e95f 2894 }
9a744ba3 2895
fb8a5ba8
BS		 2896 /*
2897 * -EACCESS could mean that the user doesn't have correct permissions
2898 * to access the mount. It could also mean that we tried to mount
2899 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2900 * existing mount programs don't handle -EACCES very well so it should
2901 * be mapped to -EPERM instead.
2902 */
2903 if (status == -EACCES)
2904 status = -EPERM;
801a16dc
BS		 2905 return status;
2906}
2907
2ed4b95b
CL		 2908static int nfs4_do_find_root_sec(struct nfs_server *server,
2909 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2910{
2911 int mv = server->nfs_client->cl_minorversion;
2912 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2913}
2914
2915/**
2916 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2917 * @server: initialized nfs_server handle
2918 * @fhandle: we fill in the pseudo-fs root file handle
2919 * @info: we fill in an FSINFO struct
5e6b1990 2920 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 2921 *
2922 * Returns zero on success, or a negative errno.
801a16dc 2923 */
3028eb2b 2924int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 2925 struct nfs_fsinfo *info,
2926 bool auth_probe)
801a16dc 2927{
2ed4b95b
CL		 2928 int status;
2929
5e6b1990
TM		 2930 switch (auth_probe) {
2931 case false:
2932 status = nfs4_lookup_root(server, fhandle, info);
2933 if (status != -NFS4ERR_WRONGSEC)
2934 break;
5e6b1990 2935 default:
2ed4b95b 2936 status = nfs4_do_find_root_sec(server, fhandle, info);
5e6b1990 2937 }
2ed4b95b 2938
1da177e4
LT		 2939 if (status == 0)
2940 status = nfs4_server_capabilities(server, fhandle);
2941 if (status == 0)
2942 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2943
c12e87f4 2944 return nfs4_map_errors(status);
1da177e4
LT		 2945}
2946
bae36241
BS		 2947static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2948 struct nfs_fsinfo *info)
2949{
2950 int error;
2951 struct nfs_fattr *fattr = info->fattr;
1775fd3e 2952 struct nfs4_label *label = NULL;
bae36241
BS		 2953
2954 error = nfs4_server_capabilities(server, mntfh);
2955 if (error < 0) {
2956 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2957 return error;
2958 }
2959
14c43f76
DQ		 2960 label = nfs4_label_alloc(server, GFP_KERNEL);
2961 if (IS_ERR(label))
2962 return PTR_ERR(label);
2963
1775fd3e 2964 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 2965 if (error < 0) {
2966 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 2967 goto err_free_label;
bae36241
BS		 2968 }
2969
2970 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2971 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2972 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2973
14c43f76
DQ		 2974err_free_label:
2975 nfs4_label_free(label);
2976
bae36241
BS		 2977 return error;
2978}
2979
6b97fd3d
MN		 2980/*
2981 * Get locations and (maybe) other attributes of a referral.
2982 * Note that we'll actually follow the referral later when
2983 * we detect fsid mismatch in inode revalidation
2984 */
f05d147f
BS		 2985static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2986 const struct qstr *name, struct nfs_fattr *fattr,
2987 struct nfs_fh *fhandle)
6b97fd3d
MN		 2988{
2989 int status = -ENOMEM;
2990 struct page *page = NULL;
2991 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2992
2993 page = alloc_page(GFP_KERNEL);
2994 if (page == NULL)
2995 goto out;
2996 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2997 if (locations == NULL)
2998 goto out;
2999
f05d147f 3000 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3001 if (status != 0)
3002 goto out;
519ae255
CL		 3003
3004 /*
3005 * If the fsid didn't change, this is a migration event, not a
3006 * referral. Cause us to drop into the exception handler, which
3007 * will kick off migration recovery.
3008 */
6b97fd3d 3009 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3010 dprintk("%s: server did not return a different fsid for"
3011 " a referral at %s\n", __func__, name->name);
519ae255 3012 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3013 goto out;
3014 }
533eb461
AA		 3015 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3016 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3017
533eb461 3018 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3019 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3020 memset(fhandle, 0, sizeof(struct nfs_fh));
3021out:
3022 if (page)
3023 __free_page(page);
5d7ca35a 3024 kfree(locations);
6b97fd3d
MN		 3025 return status;
3026}
3027
1775fd3e
DQ		 3028static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3029 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3030{
3031 struct nfs4_getattr_arg args = {
3032 .fh = fhandle,
3033 .bitmask = server->attr_bitmask,
3034 };
3035 struct nfs4_getattr_res res = {
3036 .fattr = fattr,
1775fd3e 3037 .label = label,
1da177e4
LT		 3038 .server = server,
3039 };
3040 struct rpc_message msg = {
3041 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3042 .rpc_argp = &args,
3043 .rpc_resp = &res,
3044 };
aa9c2669
DQ		 3045
3046 args.bitmask = nfs4_bitmask(server, label);
3047
0e574af1 3048 nfs_fattr_init(fattr);
7c513058 3049 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3050}
3051
1775fd3e
DQ		 3052static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3053 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3054{
3055 struct nfs4_exception exception = { };
3056 int err;
3057 do {
b5f875a9
TM		 3058 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3059 trace_nfs4_getattr(server, fhandle, fattr, err);
3060 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3061 &exception);
3062 } while (exception.retry);
3063 return err;
3064}
3065
3066/*
3067 * The file is not closed if it is opened due to the a request to change
3068 * the size of the file. The open call will not be needed once the
3069 * VFS layer lookup-intents are implemented.
3070 *
3071 * Close is called when the inode is destroyed.
3072 * If we haven't opened the file for O_WRONLY, we
3073 * need to in the size_change case to obtain a stateid.
3074 *
3075 * Got race?
3076 * Because OPEN is always done by name in nfsv4, it is
3077 * possible that we opened a different file by the same
3078 * name. We can recognize this race condition, but we
3079 * can't do anything about it besides returning an error.
3080 *
3081 * This will be fixed with VFS changes (lookup-intent).
3082 */
3083static int
3084nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3085 struct iattr *sattr)
3086{
08e9eac4 3087 struct inode *inode = dentry->d_inode;
659bfcd6 3088 struct rpc_cred *cred = NULL;
d530838b 3089 struct nfs4_state *state = NULL;
14c43f76 3090 struct nfs4_label *label = NULL;
1da177e4
LT		 3091 int status;
3092
8a1636c4 3093 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 3094 pnfs_commit_and_return_layout(inode);
8a1636c4 3095
0e574af1 3096 nfs_fattr_init(fattr);
1da177e4 3097
2669940d
AA		 3098 /* Deal with open(O_TRUNC) */
3099 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3100 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3101
3102 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3103 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3104 return 0;
3105
d530838b 3106 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3107 if (sattr->ia_valid & ATTR_FILE) {
3108 struct nfs_open_context *ctx;
3109
3110 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3111 if (ctx) {
3112 cred = ctx->cred;
3113 state = ctx->state;
3114 }
659bfcd6 3115 }
08e9eac4 3116
14c43f76
DQ		 3117 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3118 if (IS_ERR(label))
3119 return PTR_ERR(label);
3120
3121 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3122 if (status == 0) {
65e4308d 3123 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 3124 nfs_setsecurity(inode, fattr, label);
3125 }
14c43f76 3126 nfs4_label_free(label);
1da177e4
LT		 3127 return status;
3128}
3129
0c2e53f1
TM		 3130static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3131 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3132 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3133{
0c2e53f1 3134 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3135 int status;
3136 struct nfs4_lookup_arg args = {
3137 .bitmask = server->attr_bitmask,
0c2e53f1 3138 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3139 .name = name,
3140 };
3141 struct nfs4_lookup_res res = {
3142 .server = server,
3143 .fattr = fattr,
aa9c2669 3144 .label = label,
2b3de441
DH		 3145 .fh = fhandle,
3146 };
3147 struct rpc_message msg = {
3148 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3149 .rpc_argp = &args,
3150 .rpc_resp = &res,
3151 };
3152
aa9c2669
DQ		 3153 args.bitmask = nfs4_bitmask(server, label);
3154
2b3de441
DH		 3155 nfs_fattr_init(fattr);
3156
1da177e4 3157 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3158 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3159 dprintk("NFS reply lookup: %d\n", status);
3160 return status;
3161}
3162
72de53ec 3163static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3164{
7ebb9315 3165 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3166 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3167 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3168 fattr->nlink = 2;
3169}
3170
72de53ec
BS		 3171static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3172 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3173 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3174{
3175 struct nfs4_exception exception = { };
72de53ec 3176 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3177 int err;
3178 do {
1775fd3e 3179 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3180 trace_nfs4_lookup(dir, name, err);
72de53ec 3181 switch (err) {
08ef7bd3 3182 case -NFS4ERR_BADNAME:
72de53ec
BS		 3183 err = -ENOENT;
3184 goto out;
0c2e53f1 3185 case -NFS4ERR_MOVED:
f05d147f 3186 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3187 goto out;
0c2e53f1 3188 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3189 err = -EPERM;
3190 if (client != *clnt)
3191 goto out;
72de53ec
BS		 3192 client = nfs4_create_sec_client(client, dir, name);
3193 if (IS_ERR(client))
3194 return PTR_ERR(client);
3195
3196 exception.retry = 1;
3197 break;
3198 default:
3199 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3200 }
1da177e4 3201 } while (exception.retry);
72de53ec
BS		 3202
3203out:
3204 if (err == 0)
3205 *clnt = client;
3206 else if (client != *clnt)
3207 rpc_shutdown_client(client);
3208
1da177e4
LT		 3209 return err;
3210}
3211
80a16b21 3212static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3213 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3214 struct nfs4_label *label)
72de53ec
BS		 3215{
3216 int status;
3217 struct rpc_clnt *client = NFS_CLIENT(dir);
3218
1775fd3e 3219 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3220 if (client != NFS_CLIENT(dir)) {
3221 rpc_shutdown_client(client);
3222 nfs_fixup_secinfo_attributes(fattr);
3223 }
3224 return status;
3225}
3226
f05d147f
BS		 3227struct rpc_clnt *
3228nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3229 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3230{
b72888cb 3231 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3232 int status;
f05d147f 3233
1775fd3e 3234 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3235 if (status < 0)
f05d147f 3236 return ERR_PTR(status);
b72888cb 3237 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3238}
3239
1da177e4
LT		 3240static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3241{
76b32999 3242 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3243 struct nfs4_accessargs args = {
3244 .fh = NFS_FH(inode),
a4980e78 3245 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3246 };
3247 struct nfs4_accessres res = {
3248 .server = server,
1da177e4 3249 };
1da177e4
LT		 3250 struct rpc_message msg = {
3251 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3252 .rpc_argp = &args,
3253 .rpc_resp = &res,
3254 .rpc_cred = entry->cred,
3255 };
3256 int mode = entry->mask;
aa9c2669 3257 int status = 0;
1da177e4
LT		 3258
3259 /*
3260 * Determine which access bits we want to ask for...
3261 */
3262 if (mode & MAY_READ)
3263 args.access |= NFS4_ACCESS_READ;
3264 if (S_ISDIR(inode->i_mode)) {
3265 if (mode & MAY_WRITE)
3266 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3267 if (mode & MAY_EXEC)
3268 args.access |= NFS4_ACCESS_LOOKUP;
3269 } else {
3270 if (mode & MAY_WRITE)
3271 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3272 if (mode & MAY_EXEC)
3273 args.access |= NFS4_ACCESS_EXECUTE;
3274 }
c407d41a
TM		 3275
3276 res.fattr = nfs_alloc_fattr();
3277 if (res.fattr == NULL)
3278 return -ENOMEM;
3279
7c513058 3280 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3281 if (!status) {
6168f62c 3282 nfs_access_set_mask(entry, res.access);
c407d41a 3283 nfs_refresh_inode(inode, res.fattr);
1da177e4 3284 }
c407d41a 3285 nfs_free_fattr(res.fattr);
1da177e4
LT		 3286 return status;
3287}
3288
3289static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3290{
3291 struct nfs4_exception exception = { };
3292 int err;
3293 do {
c1578b76
TM		 3294 err = _nfs4_proc_access(inode, entry);
3295 trace_nfs4_access(inode, err);
3296 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3297 &exception);
3298 } while (exception.retry);
3299 return err;
3300}
3301
3302/*
3303 * TODO: For the time being, we don't try to get any attributes
3304 * along with any of the zero-copy operations READ, READDIR,
3305 * READLINK, WRITE.
3306 *
3307 * In the case of the first three, we want to put the GETATTR
3308 * after the read-type operation -- this is because it is hard
3309 * to predict the length of a GETATTR response in v4, and thus
3310 * align the READ data correctly. This means that the GETATTR
3311 * may end up partially falling into the page cache, and we should
3312 * shift it into the 'tail' of the xdr_buf before processing.
3313 * To do this efficiently, we need to know the total length
3314 * of data received, which doesn't seem to be available outside
3315 * of the RPC layer.
3316 *
3317 * In the case of WRITE, we also want to put the GETATTR after
3318 * the operation -- in this case because we want to make sure
140150db 3319 * we get the post-operation mtime and size.
1da177e4
LT		 3320 *
3321 * Both of these changes to the XDR layer would in fact be quite
3322 * minor, but I decided to leave them for a subsequent patch.
3323 */
3324static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3325 unsigned int pgbase, unsigned int pglen)
3326{
3327 struct nfs4_readlink args = {
3328 .fh = NFS_FH(inode),
3329 .pgbase = pgbase,
3330 .pglen = pglen,
3331 .pages = &page,
3332 };
f50c7000 3333 struct nfs4_readlink_res res;
1da177e4
LT		 3334 struct rpc_message msg = {
3335 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3336 .rpc_argp = &args,
f50c7000 3337 .rpc_resp = &res,
1da177e4
LT		 3338 };
3339
7c513058 3340 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3341}
3342
3343static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3344 unsigned int pgbase, unsigned int pglen)
3345{
3346 struct nfs4_exception exception = { };
3347 int err;
3348 do {
c1578b76
TM		 3349 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3350 trace_nfs4_readlink(inode, err);
3351 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3352 &exception);
3353 } while (exception.retry);
3354 return err;
3355}
3356
1da177e4 3357/*
8867fe58 3358 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3359 */
1da177e4
LT		 3360static int
3361nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3362 int flags)
1da177e4 3363{
aa9c2669 3364 struct nfs4_label l, *ilabel = NULL;
8867fe58 3365 struct nfs_open_context *ctx;
1da177e4 3366 struct nfs4_state *state;
5bc2afc2 3367 int opened = 0;
1da177e4
LT		 3368 int status = 0;
3369
8867fe58
MS		 3370 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3371 if (IS_ERR(ctx))
3372 return PTR_ERR(ctx);
3373
aa9c2669
DQ		 3374 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3375
a8a5da99 3376 sattr->ia_mode &= ~current_umask();
5bc2afc2 3377 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3378 if (IS_ERR(state)) {
3379 status = PTR_ERR(state);
c0204fd2 3380 goto out;
1da177e4 3381 }
1da177e4 3382out:
aa9c2669 3383 nfs4_label_release_security(ilabel);
8867fe58 3384 put_nfs_open_context(ctx);
1da177e4
LT		 3385 return status;
3386}
3387
3388static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3389{
16e42959 3390 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3391 struct nfs_removeargs args = {
1da177e4 3392 .fh = NFS_FH(dir),
26fe5750 3393 .name = *name,
16e42959 3394 };
4fdc17b2 3395 struct nfs_removeres res = {
16e42959 3396 .server = server,
1da177e4 3397 };
1da177e4 3398 struct rpc_message msg = {
4fdc17b2
TM		 3399 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3400 .rpc_argp = &args,
3401 .rpc_resp = &res,
1da177e4 3402 };
778d2817 3403 int status;
1da177e4 3404
7c513058 3405 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3406 if (status == 0)
16e42959 3407 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3408 return status;
3409}
3410
3411static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3412{
3413 struct nfs4_exception exception = { };
3414 int err;
3415 do {
078ea3df
TM		 3416 err = _nfs4_proc_remove(dir, name);
3417 trace_nfs4_remove(dir, name, err);
3418 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3419 &exception);
3420 } while (exception.retry);
3421 return err;
3422}
3423
e4eff1a6 3424static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3425{
e4eff1a6
TM		 3426 struct nfs_server *server = NFS_SERVER(dir);
3427 struct nfs_removeargs *args = msg->rpc_argp;
3428 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3429
e4eff1a6 3430 res->server = server;
1da177e4 3431 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3432 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3433
3434 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3435}
3436
34e137cc
BS		 3437static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3438{
d9afbd1b
TM		 3439 nfs4_setup_sequence(NFS_SERVER(data->dir),
3440 &data->args.seq_args,
3441 &data->res.seq_res,
3442 task);
1da177e4
LT		 3443}
3444
e4eff1a6 3445static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3446{
078ea3df
TM		 3447 struct nfs_unlinkdata *data = task->tk_calldata;
3448 struct nfs_removeres *res = &data->res;
e4eff1a6 3449
14516c3a
TM		 3450 if (!nfs4_sequence_done(task, &res->seq_res))
3451 return 0;
9e33bed5 3452 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3453 return 0;
3454 update_changeattr(dir, &res->cinfo);
e4eff1a6 3455 return 1;
1da177e4
LT		 3456}
3457
d3d4152a
JL		 3458static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3459{
3460 struct nfs_server *server = NFS_SERVER(dir);
3461 struct nfs_renameargs *arg = msg->rpc_argp;
3462 struct nfs_renameres *res = msg->rpc_resp;
3463
3464 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3465 res->server = server;
a9c92d6b 3466 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3467}
3468
c6bfa1a1
BS		 3469static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3470{
d9afbd1b
TM		 3471 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3472 &data->args.seq_args,
3473 &data->res.seq_res,
3474 task);
d3d4152a
JL		 3475}
3476
3477static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3478 struct inode *new_dir)
3479{
fbc6f7c2
TM		 3480 struct nfs_renamedata *data = task->tk_calldata;
3481 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3482
3483 if (!nfs4_sequence_done(task, &res->seq_res))
3484 return 0;
3485 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3486 return 0;
3487
3488 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3489 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3490 return 1;
3491}
3492
1da177e4
LT		 3493static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3494 struct inode *new_dir, struct qstr *new_name)
3495{
6caf2c82 3496 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3497 struct nfs_renameargs arg = {
1da177e4
LT		 3498 .old_dir = NFS_FH(old_dir),
3499 .new_dir = NFS_FH(new_dir),
3500 .old_name = old_name,
3501 .new_name = new_name,
6caf2c82 3502 };
e8582a8b 3503 struct nfs_renameres res = {
6caf2c82 3504 .server = server,
1da177e4 3505 };
1da177e4
LT		 3506 struct rpc_message msg = {
3507 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3508 .rpc_argp = &arg,
3509 .rpc_resp = &res,
3510 };
011fff72 3511 int status = -ENOMEM;
14c43f76 3512
7c513058 3513 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3514 if (!status) {
3515 update_changeattr(old_dir, &res.old_cinfo);
3516 update_changeattr(new_dir, &res.new_cinfo);
3517 }
3518 return status;
3519}
3520
3521static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3522 struct inode *new_dir, struct qstr *new_name)
3523{
3524 struct nfs4_exception exception = { };
3525 int err;
3526 do {
fbc6f7c2
TM		 3527 err = _nfs4_proc_rename(old_dir, old_name,
3528 new_dir, new_name);
3529 trace_nfs4_rename(old_dir, old_name, new_dir, new_name, err);
3530 err = nfs4_handle_exception(NFS_SERVER(old_dir), err,
1da177e4
LT		 3531 &exception);
3532 } while (exception.retry);
3533 return err;
3534}
3535
3536static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3537{
91ba2eee 3538 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3539 struct nfs4_link_arg arg = {
3540 .fh = NFS_FH(inode),
3541 .dir_fh = NFS_FH(dir),
3542 .name = name,
91ba2eee
TM		 3543 .bitmask = server->attr_bitmask,
3544 };
91ba2eee
TM		 3545 struct nfs4_link_res res = {
3546 .server = server,
1775fd3e 3547 .label = NULL,
1da177e4 3548 };
1da177e4
LT		 3549 struct rpc_message msg = {
3550 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3551 .rpc_argp = &arg,
91ba2eee 3552 .rpc_resp = &res,
1da177e4 3553 };
136f2627
TM		 3554 int status = -ENOMEM;
3555
3556 res.fattr = nfs_alloc_fattr();
778d2817 3557 if (res.fattr == NULL)
136f2627 3558 goto out;
1da177e4 3559
14c43f76
DQ		 3560 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3561 if (IS_ERR(res.label)) {
3562 status = PTR_ERR(res.label);
3563 goto out;
3564 }
aa9c2669 3565 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3566
7c513058 3567 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3568 if (!status) {
3569 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3570 status = nfs_post_op_update_inode(inode, res.fattr);
3571 if (!status)
3572 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3573 }
14c43f76
DQ		 3574
3575
3576 nfs4_label_free(res.label);
3577
136f2627 3578out:
136f2627 3579 nfs_free_fattr(res.fattr);
1da177e4
LT		 3580 return status;
3581}
3582
3583static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3584{
3585 struct nfs4_exception exception = { };
3586 int err;
3587 do {
3588 err = nfs4_handle_exception(NFS_SERVER(inode),
3589 _nfs4_proc_link(inode, dir, name),
3590 &exception);
3591 } while (exception.retry);
3592 return err;
3593}
3594
57dc9a57
TM		 3595struct nfs4_createdata {
3596 struct rpc_message msg;
3597 struct nfs4_create_arg arg;
3598 struct nfs4_create_res res;
3599 struct nfs_fh fh;
3600 struct nfs_fattr fattr;
1775fd3e 3601 struct nfs4_label *label;
57dc9a57
TM		 3602};
3603
3604static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3605 struct qstr *name, struct iattr *sattr, u32 ftype)
3606{
3607 struct nfs4_createdata *data;
3608
3609 data = kzalloc(sizeof(*data), GFP_KERNEL);
3610 if (data != NULL) {
3611 struct nfs_server *server = NFS_SERVER(dir);
3612
14c43f76
DQ		 3613 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3614 if (IS_ERR(data->label))
3615 goto out_free;
3616
57dc9a57
TM		 3617 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3618 data->msg.rpc_argp = &data->arg;
3619 data->msg.rpc_resp = &data->res;
3620 data->arg.dir_fh = NFS_FH(dir);
3621 data->arg.server = server;
3622 data->arg.name = name;
3623 data->arg.attrs = sattr;
3624 data->arg.ftype = ftype;
aa9c2669 3625 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3626 data->res.server = server;
3627 data->res.fh = &data->fh;
3628 data->res.fattr = &data->fattr;
1775fd3e 3629 data->res.label = data->label;
57dc9a57 3630 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3631 }
3632 return data;
14c43f76
DQ		 3633out_free:
3634 kfree(data);
3635 return NULL;
57dc9a57
TM		 3636}
3637
3638static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3639{
7c513058 3640 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3641 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3642 if (status == 0) {
3643 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3644 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3645 }
3646 return status;
3647}
3648
3649static void nfs4_free_createdata(struct nfs4_createdata *data)
3650{
14c43f76 3651 nfs4_label_free(data->label);
57dc9a57
TM		 3652 kfree(data);
3653}
3654
4f390c15 3655static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3656 struct page *page, unsigned int len, struct iattr *sattr,
3657 struct nfs4_label *label)
1da177e4 3658{
57dc9a57
TM		 3659 struct nfs4_createdata *data;
3660 int status = -ENAMETOOLONG;
1da177e4 3661
94a6d753 3662 if (len > NFS4_MAXPATHLEN)
57dc9a57 3663 goto out;
4f390c15 3664
57dc9a57
TM		 3665 status = -ENOMEM;
3666 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3667 if (data == NULL)
3668 goto out;
3669
3670 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3671 data->arg.u.symlink.pages = &page;
3672 data->arg.u.symlink.len = len;
1775fd3e 3673 data->arg.label = label;
1da177e4 3674
57dc9a57
TM		 3675 status = nfs4_do_create(dir, dentry, data);
3676
3677 nfs4_free_createdata(data);
3678out:
1da177e4
LT		 3679 return status;
3680}
3681
4f390c15 3682static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3683 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3684{
3685 struct nfs4_exception exception = { };
aa9c2669 3686 struct nfs4_label l, *label = NULL;
1da177e4 3687 int err;
aa9c2669
DQ		 3688
3689 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3690
1da177e4 3691 do {
078ea3df
TM		 3692 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3693 trace_nfs4_symlink(dir, &dentry->d_name, err);
3694 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3695 &exception);
3696 } while (exception.retry);
aa9c2669
DQ		 3697
3698 nfs4_label_release_security(label);
1da177e4
LT		 3699 return err;
3700}
3701
3702static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3703 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3704{
57dc9a57
TM		 3705 struct nfs4_createdata *data;
3706 int status = -ENOMEM;
1da177e4 3707
57dc9a57
TM		 3708 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3709 if (data == NULL)
3710 goto out;
3711
1775fd3e 3712 data->arg.label = label;
57dc9a57
TM		 3713 status = nfs4_do_create(dir, dentry, data);
3714
3715 nfs4_free_createdata(data);
3716out:
1da177e4
LT		 3717 return status;
3718}
3719
3720static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3721 struct iattr *sattr)
3722{
3723 struct nfs4_exception exception = { };
aa9c2669 3724 struct nfs4_label l, *label = NULL;
1da177e4 3725 int err;
a8a5da99 3726
aa9c2669
DQ		 3727 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3728
a8a5da99 3729 sattr->ia_mode &= ~current_umask();
1da177e4 3730 do {
078ea3df
TM		 3731 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3732 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3733 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3734 &exception);
3735 } while (exception.retry);
aa9c2669
DQ		 3736 nfs4_label_release_security(label);
3737
1da177e4
LT		 3738 return err;
3739}
3740
3741static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3742 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3743{
3744 struct inode *dir = dentry->d_inode;
3745 struct nfs4_readdir_arg args = {
3746 .fh = NFS_FH(dir),
56e4ebf8 3747 .pages = pages,
1da177e4
LT		 3748 .pgbase = 0,
3749 .count = count,
96d25e53 3750 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3751 .plus = plus,
1da177e4
LT		 3752 };
3753 struct nfs4_readdir_res res;
3754 struct rpc_message msg = {
3755 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3756 .rpc_argp = &args,
3757 .rpc_resp = &res,
3758 .rpc_cred = cred,
3759 };
3760 int status;
3761
3110ff80 3762 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3763 dentry->d_parent->d_name.name,
3764 dentry->d_name.name,
3765 (unsigned long long)cookie);
c3f52af3 3766 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3767 res.pgbase = args.pgbase;
7c513058 3768 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3769 if (status >= 0) {
c3f52af3 3770 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3771 status += args.pgbase;
3772 }
c4812998
TM		 3773
3774 nfs_invalidate_atime(dir);
3775
3110ff80 3776 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3777 return status;
3778}
3779
3780static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3781 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3782{
3783 struct nfs4_exception exception = { };
3784 int err;
3785 do {
c1578b76
TM		 3786 err = _nfs4_proc_readdir(dentry, cred, cookie,
3787 pages, count, plus);
3788 trace_nfs4_readdir(dentry->d_inode, err);
3789 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3790 &exception);
3791 } while (exception.retry);
3792 return err;
3793}
3794
3795static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3796 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3797{
57dc9a57
TM		 3798 struct nfs4_createdata *data;
3799 int mode = sattr->ia_mode;
3800 int status = -ENOMEM;
1da177e4 3801
57dc9a57
TM		 3802 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3803 if (data == NULL)
3804 goto out;
3805
1da177e4 3806 if (S_ISFIFO(mode))
57dc9a57 3807 data->arg.ftype = NF4FIFO;
1da177e4 3808 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3809 data->arg.ftype = NF4BLK;
3810 data->arg.u.device.specdata1 = MAJOR(rdev);
3811 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3812 }
3813 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3814 data->arg.ftype = NF4CHR;
3815 data->arg.u.device.specdata1 = MAJOR(rdev);
3816 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3817 } else if (!S_ISSOCK(mode)) {
3818 status = -EINVAL;
3819 goto out_free;
1da177e4 3820 }
1775fd3e 3821
aa9c2669 3822 data->arg.label = label;
57dc9a57 3823 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3824out_free:
57dc9a57
TM		 3825 nfs4_free_createdata(data);
3826out:
1da177e4
LT		 3827 return status;
3828}
3829
3830static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3831 struct iattr *sattr, dev_t rdev)
3832{
3833 struct nfs4_exception exception = { };
aa9c2669 3834 struct nfs4_label l, *label = NULL;
1da177e4 3835 int err;
a8a5da99 3836
aa9c2669
DQ		 3837 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3838
a8a5da99 3839 sattr->ia_mode &= ~current_umask();
1da177e4 3840 do {
078ea3df
TM		 3841 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3842 trace_nfs4_mknod(dir, &dentry->d_name, err);
3843 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3844 &exception);
3845 } while (exception.retry);
aa9c2669
DQ		 3846
3847 nfs4_label_release_security(label);
3848
1da177e4
LT		 3849 return err;
3850}
3851
3852static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3853 struct nfs_fsstat *fsstat)
3854{
3855 struct nfs4_statfs_arg args = {
3856 .fh = fhandle,
3857 .bitmask = server->attr_bitmask,
3858 };
24ad148a
BH		 3859 struct nfs4_statfs_res res = {
3860 .fsstat = fsstat,
3861 };
1da177e4
LT		 3862 struct rpc_message msg = {
3863 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3864 .rpc_argp = &args,
24ad148a 3865 .rpc_resp = &res,
1da177e4
LT		 3866 };
3867
0e574af1 3868 nfs_fattr_init(fsstat->fattr);
7c513058 3869 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3870}
3871
3872static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3873{
3874 struct nfs4_exception exception = { };
3875 int err;
3876 do {
3877 err = nfs4_handle_exception(server,
3878 _nfs4_proc_statfs(server, fhandle, fsstat),
3879 &exception);
3880 } while (exception.retry);
3881 return err;
3882}
3883
3884static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3885 struct nfs_fsinfo *fsinfo)
3886{
3887 struct nfs4_fsinfo_arg args = {
3888 .fh = fhandle,
3889 .bitmask = server->attr_bitmask,
3890 };
3dda5e43
BH		 3891 struct nfs4_fsinfo_res res = {
3892 .fsinfo = fsinfo,
3893 };
1da177e4
LT		 3894 struct rpc_message msg = {
3895 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3896 .rpc_argp = &args,
3dda5e43 3897 .rpc_resp = &res,
1da177e4
LT		 3898 };
3899
7c513058 3900 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3901}
3902
3903static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3904{
3905 struct nfs4_exception exception = { };
83ca7f5a 3906 unsigned long now = jiffies;
1da177e4
LT		 3907 int err;
3908
3909 do {
83ca7f5a 3910 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 3911 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 3912 if (err == 0) {
3913 struct nfs_client *clp = server->nfs_client;
3914
3915 spin_lock(&clp->cl_lock);
3916 clp->cl_lease_time = fsinfo->lease_time * HZ;
3917 clp->cl_last_renewal = now;
3918 spin_unlock(&clp->cl_lock);
3919 break;
3920 }
3921 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3922 } while (exception.retry);
3923 return err;
3924}
3925
3926static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3927{
e38eb650
BS		 3928 int error;
3929
0e574af1 3930 nfs_fattr_init(fsinfo->fattr);
e38eb650 3931 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3932 if (error == 0) {
3933 /* block layout checks this! */
3934 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3935 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3936 }
e38eb650
BS		 3937
3938 return error;
1da177e4
LT		 3939}
3940
3941static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3942 struct nfs_pathconf *pathconf)
3943{
3944 struct nfs4_pathconf_arg args = {
3945 .fh = fhandle,
3946 .bitmask = server->attr_bitmask,
3947 };
d45b2989
BH		 3948 struct nfs4_pathconf_res res = {
3949 .pathconf = pathconf,
3950 };
1da177e4
LT		 3951 struct rpc_message msg = {
3952 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3953 .rpc_argp = &args,
d45b2989 3954 .rpc_resp = &res,
1da177e4
LT		 3955 };
3956
3957 /* None of the pathconf attributes are mandatory to implement */
3958 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3959 memset(pathconf, 0, sizeof(*pathconf));
3960 return 0;
3961 }
3962
0e574af1 3963 nfs_fattr_init(pathconf->fattr);
7c513058 3964 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3965}
3966
3967static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3968 struct nfs_pathconf *pathconf)
3969{
3970 struct nfs4_exception exception = { };
3971 int err;
3972
3973 do {
3974 err = nfs4_handle_exception(server,
3975 _nfs4_proc_pathconf(server, fhandle, pathconf),
3976 &exception);
3977 } while (exception.retry);
3978 return err;
3979}
3980
5521abfd 3981int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3982 const struct nfs_open_context *ctx,
3983 const struct nfs_lock_context *l_ctx,
3984 fmode_t fmode)
3985{
3986 const struct nfs_lockowner *lockowner = NULL;
3987
3988 if (l_ctx != NULL)
3989 lockowner = &l_ctx->lockowner;
5521abfd 3990 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3991}
3992EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3993
5521abfd
TM		 3994static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3995 const struct nfs_open_context *ctx,
3996 const struct nfs_lock_context *l_ctx,
3997 fmode_t fmode)
3998{
3999 nfs4_stateid current_stateid;
4000
4001 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
4002 return false;
4003 return nfs4_stateid_match(stateid, &current_stateid);
4004}
4005
4006static bool nfs4_error_stateid_expired(int err)
4007{
4008 switch (err) {
4009 case -NFS4ERR_DELEG_REVOKED:
4010 case -NFS4ERR_ADMIN_REVOKED:
4011 case -NFS4ERR_BAD_STATEID:
4012 case -NFS4ERR_STALE_STATEID:
4013 case -NFS4ERR_OLD_STATEID:
4014 case -NFS4ERR_OPENMODE:
4015 case -NFS4ERR_EXPIRED:
4016 return true;
4017 }
4018 return false;
4019}
4020
d20581aa
BH		 4021void __nfs4_read_done_cb(struct nfs_read_data *data)
4022{
cd841605 4023 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 4024}
4025
cbdabc7f 4026static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 4027{
cd841605 4028 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 4029
cc668ab3 4030 trace_nfs4_read(data, task->tk_status);
9e33bed5 4031 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 4032 rpc_restart_call_prepare(task);
ec06c096 4033 return -EAGAIN;
1da177e4 4034 }
8850df99 4035
d20581aa 4036 __nfs4_read_done_cb(data);
1da177e4 4037 if (task->tk_status > 0)
ec06c096
TM		 4038 renew_lease(server, data->timestamp);
4039 return 0;
1da177e4
LT		 4040}
4041
5521abfd
TM		 4042static bool nfs4_read_stateid_changed(struct rpc_task *task,
4043 struct nfs_readargs *args)
4044{
4045
4046 if (!nfs4_error_stateid_expired(task->tk_status) ||
4047 nfs4_stateid_is_current(&args->stateid,
4048 args->context,
4049 args->lock_context,
4050 FMODE_READ))
4051 return false;
4052 rpc_restart_call_prepare(task);
4053 return true;
4054}
4055
cbdabc7f
AA		 4056static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
4057{
4058
4059 dprintk("--> %s\n", __func__);
4060
4061 if (!nfs4_sequence_done(task, &data->res.seq_res))
4062 return -EAGAIN;
5521abfd
TM		 4063 if (nfs4_read_stateid_changed(task, &data->args))
4064 return -EAGAIN;
d20581aa
BH		 4065 return data->read_done_cb ? data->read_done_cb(task, data) :
4066 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 4067}
4068
bdc7f021 4069static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 4070{
1da177e4 4071 data->timestamp = jiffies;
cbdabc7f 4072 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 4073 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
a9c92d6b 4074 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 4075}
4076
ef1820f9 4077static int nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
ea7c3303 4078{
9b206149 4079 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 4080 &data->args.seq_args,
4081 &data->res.seq_res,
9b206149 4082 task))
ef1820f9
N		 4083 return 0;
4084 if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4085 data->args.lock_context, FMODE_READ) == -EIO)
4086 return -EIO;
4087 if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags)))
4088 return -EIO;
4089 return 0;
1da177e4
LT		 4090}
4091
b029bc9b 4092static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 4093{
cd841605 4094 struct inode *inode = data->header->inode;
1da177e4 4095
cc668ab3 4096 trace_nfs4_write(data, task->tk_status);
9e33bed5 4097 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 4098 rpc_restart_call_prepare(task);
788e7a89 4099 return -EAGAIN;
1da177e4 4100 }
4f9838c7 4101 if (task->tk_status >= 0) {
1da177e4 4102 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 4103 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 4104 }
788e7a89 4105 return 0;
1da177e4
LT		 4106}
4107
5521abfd
TM		 4108static bool nfs4_write_stateid_changed(struct rpc_task *task,
4109 struct nfs_writeargs *args)
4110{
4111
4112 if (!nfs4_error_stateid_expired(task->tk_status) ||
4113 nfs4_stateid_is_current(&args->stateid,
4114 args->context,
4115 args->lock_context,
4116 FMODE_WRITE))
4117 return false;
4118 rpc_restart_call_prepare(task);
4119 return true;
4120}
4121
b029bc9b
FI		 4122static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
4123{
4124 if (!nfs4_sequence_done(task, &data->res.seq_res))
4125 return -EAGAIN;
5521abfd
TM		 4126 if (nfs4_write_stateid_changed(task, &data->args))
4127 return -EAGAIN;
d20581aa
BH		 4128 return data->write_done_cb ? data->write_done_cb(task, data) :
4129 nfs4_write_done_cb(task, data);
b029bc9b
FI		 4130}
4131
5a37f851
TM		 4132static
4133bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 4134{
5a37f851
TM		 4135 const struct nfs_pgio_header *hdr = data->header;
4136
4137 /* Don't request attributes for pNFS or O_DIRECT writes */
4138 if (data->ds_clp != NULL || hdr->dreq != NULL)
4139 return false;
4140 /* Otherwise, request attributes if and only if we don't hold
4141 * a delegation
4142 */
011e2a7f 4143 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4144}
a69aef14 4145
bdc7f021 4146static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 4147{
cd841605 4148 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 4149
5a37f851 4150 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 4151 data->args.bitmask = NULL;
4152 data->res.fattr = NULL;
4153 } else
4154 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4155
b029bc9b
FI		 4156 if (!data->write_done_cb)
4157 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 4158 data->res.server = server;
1da177e4
LT		 4159 data->timestamp = jiffies;
4160
bdc7f021 4161 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
a9c92d6b 4162 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4163}
4164
ef1820f9 4165static int nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
c6cb80d0 4166{
9b206149 4167 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 4168 &data->args.seq_args,
4169 &data->res.seq_res,
9b206149 4170 task))
ef1820f9
N		 4171 return 0;
4172 if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4173 data->args.lock_context, FMODE_WRITE) == -EIO)
4174 return -EIO;
4175 if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags)))
4176 return -EIO;
4177 return 0;
1da177e4
LT		 4178}
4179
0b7c0153 4180static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4181{
d9afbd1b
TM		 4182 nfs4_setup_sequence(NFS_SERVER(data->inode),
4183 &data->args.seq_args,
4184 &data->res.seq_res,
4185 task);
1da177e4
LT		 4186}
4187
0b7c0153 4188static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4189{
1da177e4 4190 struct inode *inode = data->inode;
14516c3a 4191
cc668ab3 4192 trace_nfs4_commit(data, task->tk_status);
9e33bed5 4193 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 4194 rpc_restart_call_prepare(task);
788e7a89 4195 return -EAGAIN;
1da177e4 4196 }
788e7a89 4197 return 0;
1da177e4
LT		 4198}
4199
0b7c0153 4200static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4201{
4202 if (!nfs4_sequence_done(task, &data->res.seq_res))
4203 return -EAGAIN;
0b7c0153 4204 return data->commit_done_cb(task, data);
5f452431
FI		 4205}
4206
0b7c0153 4207static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4208{
788e7a89 4209 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4210
0b7c0153
FI		 4211 if (data->commit_done_cb == NULL)
4212 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4213 data->res.server = server;
bdc7f021 4214 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4215 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4216}
4217
9bc4e3ca
CL		 4218struct nfs4_renewdata {
4219 struct nfs_client *client;
4220 unsigned long timestamp;
4221};
4222
1da177e4
LT		 4223/*
4224 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4225 * standalone procedure for queueing an asynchronous RENEW.
4226 */
9bc4e3ca 4227static void nfs4_renew_release(void *calldata)
dc96aef9 4228{
9bc4e3ca
CL		 4229 struct nfs4_renewdata *data = calldata;
4230 struct nfs_client *clp = data->client;
dc96aef9 4231
0851de06
AB		 4232 if (atomic_read(&clp->cl_count) > 1)
4233 nfs4_schedule_state_renewal(clp);
4234 nfs_put_client(clp);
9bc4e3ca 4235 kfree(data);
dc96aef9
AB		 4236}
4237
9bc4e3ca 4238static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4239{
9bc4e3ca
CL		 4240 struct nfs4_renewdata *data = calldata;
4241 struct nfs_client *clp = data->client;
4242 unsigned long timestamp = data->timestamp;
1da177e4 4243
c6d01c6f 4244 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4245 switch (task->tk_status) {
4246 case 0:
4247 break;
4248 case -NFS4ERR_LEASE_MOVED:
4249 nfs4_schedule_lease_moved_recovery(clp);
4250 break;
4251 default:
95baa25c 4252 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4253 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4254 return;
4255 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4256 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4257 return;
4258 }
4259 nfs4_schedule_path_down_recovery(clp);
1da177e4 4260 }
452e9352 4261 do_renew_lease(clp, timestamp);
1da177e4
LT		 4262}
4263
963d8fe5
TM		 4264static const struct rpc_call_ops nfs4_renew_ops = {
4265 .rpc_call_done = nfs4_renew_done,
dc96aef9 4266 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4267};
4268
2f60ea6b 4269static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4270{
4271 struct rpc_message msg = {
4272 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4273 .rpc_argp = clp,
b4454fe1 4274 .rpc_cred = cred,
1da177e4 4275 };
9bc4e3ca 4276 struct nfs4_renewdata *data;
1da177e4 4277
2f60ea6b
TM		 4278 if (renew_flags == 0)
4279 return 0;
0851de06
AB		 4280 if (!atomic_inc_not_zero(&clp->cl_count))
4281 return -EIO;
b569ad34 4282 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4283 if (data == NULL)
4284 return -ENOMEM;
4285 data->client = clp;
4286 data->timestamp = jiffies;
bc7a05ca 4287 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4288 &nfs4_renew_ops, data);
1da177e4
LT		 4289}
4290
8534d4ec 4291static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4292{
4293 struct rpc_message msg = {
4294 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4295 .rpc_argp = clp,
b4454fe1 4296 .rpc_cred = cred,
1da177e4
LT		 4297 };
4298 unsigned long now = jiffies;
4299 int status;
4300
bc7a05ca 4301 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4302 if (status < 0)
4303 return status;
452e9352 4304 do_renew_lease(clp, now);
1da177e4
LT		 4305 return 0;
4306}
4307
aa1870af
BF		 4308static inline int nfs4_server_supports_acls(struct nfs_server *server)
4309{
4310 return (server->caps & NFS_CAP_ACLS)
4311 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
4312 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
4313}
4314
21f498c2
TM		 4315/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4316 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4317 * the stack.
4318 */
21f498c2 4319#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4320
e9e3d724
NH		 4321static int buf_to_pages_noslab(const void *buf, size_t buflen,
4322 struct page **pages, unsigned int *pgbase)
4323{
4324 struct page *newpage, **spages;
4325 int rc = 0;
4326 size_t len;
4327 spages = pages;
4328
4329 do {
21f498c2 4330 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4331 newpage = alloc_page(GFP_KERNEL);
4332
4333 if (newpage == NULL)
4334 goto unwind;
4335 memcpy(page_address(newpage), buf, len);
4336 buf += len;
4337 buflen -= len;
4338 *pages++ = newpage;
4339 rc++;
4340 } while (buflen != 0);
4341
4342 return rc;
4343
4344unwind:
4345 for(; rc > 0; rc--)
4346 __free_page(spages[rc-1]);
4347 return -ENOMEM;
4348}
4349
e50a1c2e
BF		 4350struct nfs4_cached_acl {
4351 int cached;
4352 size_t len;
3e9d4154 4353 char data[0];
e50a1c2e
BF		 4354};
4355
4356static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4357{
4358 struct nfs_inode *nfsi = NFS_I(inode);
4359
4360 spin_lock(&inode->i_lock);
4361 kfree(nfsi->nfs4_acl);
4362 nfsi->nfs4_acl = acl;
4363 spin_unlock(&inode->i_lock);
4364}
4365
4366static void nfs4_zap_acl_attr(struct inode *inode)
4367{
4368 nfs4_set_cached_acl(inode, NULL);
4369}
4370
4371static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4372{
4373 struct nfs_inode *nfsi = NFS_I(inode);
4374 struct nfs4_cached_acl *acl;
4375 int ret = -ENOENT;
4376
4377 spin_lock(&inode->i_lock);
4378 acl = nfsi->nfs4_acl;
4379 if (acl == NULL)
4380 goto out;
4381 if (buf == NULL) /* user is just asking for length */
4382 goto out_len;
4383 if (acl->cached == 0)
4384 goto out;
4385 ret = -ERANGE; /* see getxattr(2) man page */
4386 if (acl->len > buflen)
4387 goto out;
4388 memcpy(buf, acl->data, acl->len);
4389out_len:
4390 ret = acl->len;
4391out:
4392 spin_unlock(&inode->i_lock);
4393 return ret;
4394}
4395
5794d21e 4396static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4397{
4398 struct nfs4_cached_acl *acl;
b291f1b1 4399 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4400
1f1ea6c2 4401 if (buflen <= PAGE_SIZE) {
b291f1b1 4402 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4403 if (acl == NULL)
4404 goto out;
4405 acl->cached = 1;
5794d21e 4406 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4407 } else {
4408 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4409 if (acl == NULL)
4410 goto out;
4411 acl->cached = 0;
4412 }
4413 acl->len = acl_len;
4414out:
4415 nfs4_set_cached_acl(inode, acl);
4416}
4417
bf118a34
AA		 4418/*
4419 * The getxattr API returns the required buffer length when called with a
4420 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4421 * the required buf. On a NULL buf, we send a page of data to the server
4422 * guessing that the ACL request can be serviced by a page. If so, we cache
4423 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4424 * the cache. If not so, we throw away the page, and cache the required
4425 * length. The next getxattr call will then produce another round trip to
4426 * the server, this time with the input buf of the required size.
4427 */
16b4289c 4428static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4429{
bf118a34 4430 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4431 struct nfs_getaclargs args = {
4432 .fh = NFS_FH(inode),
4433 .acl_pages = pages,
4434 .acl_len = buflen,
4435 };
663c79b3
BH		 4436 struct nfs_getaclres res = {
4437 .acl_len = buflen,
4438 };
aa1870af
BF		 4439 struct rpc_message msg = {
4440 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4441 .rpc_argp = &args,
663c79b3 4442 .rpc_resp = &res,
aa1870af 4443 };
21f498c2
TM		 4444 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4445 int ret = -ENOMEM, i;
aa1870af 4446
bf118a34
AA		 4447 /* As long as we're doing a round trip to the server anyway,
4448 * let's be prepared for a page of acl data. */
4449 if (npages == 0)
4450 npages = 1;
21f498c2
TM		 4451 if (npages > ARRAY_SIZE(pages))
4452 return -ERANGE;
5a006899 4453
bf118a34
AA		 4454 for (i = 0; i < npages; i++) {
4455 pages[i] = alloc_page(GFP_KERNEL);
4456 if (!pages[i])
4457 goto out_free;
e50a1c2e 4458 }
5a006899
SP		 4459
4460 /* for decoding across pages */
4461 res.acl_scratch = alloc_page(GFP_KERNEL);
4462 if (!res.acl_scratch)
4463 goto out_free;
4464
bf118a34
AA		 4465 args.acl_len = npages * PAGE_SIZE;
4466 args.acl_pgbase = 0;
5a006899 4467
de040bec 4468 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4469 __func__, buf, buflen, npages, args.acl_len);
4470 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4471 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4472 if (ret)
4473 goto out_free;
bf118a34 4474
1f1ea6c2
TM		 4475 /* Handle the case where the passed-in buffer is too short */
4476 if (res.acl_flags & NFS4_ACL_TRUNC) {
4477 /* Did the user only issue a request for the acl length? */
4478 if (buf == NULL)
4479 goto out_ok;
e50a1c2e 4480 ret = -ERANGE;
1f1ea6c2 4481 goto out_free;
e50a1c2e 4482 }
1f1ea6c2 4483 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4484 if (buf) {
4485 if (res.acl_len > buflen) {
4486 ret = -ERANGE;
4487 goto out_free;
4488 }
1f1ea6c2 4489 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4490 }
1f1ea6c2
TM		 4491out_ok:
4492 ret = res.acl_len;
e50a1c2e 4493out_free:
bf118a34
AA		 4494 for (i = 0; i < npages; i++)
4495 if (pages[i])
4496 __free_page(pages[i]);
331818f1
TM		 4497 if (res.acl_scratch)
4498 __free_page(res.acl_scratch);
aa1870af
BF		 4499 return ret;
4500}
4501
16b4289c
TM		 4502static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4503{
4504 struct nfs4_exception exception = { };
4505 ssize_t ret;
4506 do {
4507 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4508 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4509 if (ret >= 0)
4510 break;
4511 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4512 } while (exception.retry);
4513 return ret;
4514}
4515
e50a1c2e
BF		 4516static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4517{
4518 struct nfs_server *server = NFS_SERVER(inode);
4519 int ret;
4520
4521 if (!nfs4_server_supports_acls(server))
4522 return -EOPNOTSUPP;
4523 ret = nfs_revalidate_inode(server, inode);
4524 if (ret < 0)
4525 return ret;
08a22b39
AK		 4526 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4527 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4528 ret = nfs4_read_cached_acl(inode, buf, buflen);
4529 if (ret != -ENOENT)
bf118a34
AA		 4530 /* -ENOENT is returned if there is no ACL or if there is an ACL
4531 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4532 return ret;
4533 return nfs4_get_acl_uncached(inode, buf, buflen);
4534}
4535
16b4289c 4536static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4537{
4538 struct nfs_server *server = NFS_SERVER(inode);
4539 struct page *pages[NFS4ACL_MAXPAGES];
4540 struct nfs_setaclargs arg = {
4541 .fh = NFS_FH(inode),
4542 .acl_pages = pages,
4543 .acl_len = buflen,
4544 };
73c403a9 4545 struct nfs_setaclres res;
4b580ee3
BF		 4546 struct rpc_message msg = {
4547 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4548 .rpc_argp = &arg,
73c403a9 4549 .rpc_resp = &res,
4b580ee3 4550 };
21f498c2 4551 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4552 int ret, i;
4b580ee3
BF		 4553
4554 if (!nfs4_server_supports_acls(server))
4555 return -EOPNOTSUPP;
21f498c2
TM		 4556 if (npages > ARRAY_SIZE(pages))
4557 return -ERANGE;
e9e3d724
NH		 4558 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4559 if (i < 0)
4560 return i;
57ec14c5 4561 nfs4_inode_return_delegation(inode);
7c513058 4562 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4563
4564 /*
4565 * Free each page after tx, so the only ref left is
4566 * held by the network stack
4567 */
4568 for (; i > 0; i--)
4569 put_page(pages[i-1]);
4570
08a22b39
AK		 4571 /*
4572 * Acl update can result in inode attribute update.
4573 * so mark the attribute cache invalid.
4574 */
4575 spin_lock(&inode->i_lock);
4576 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4577 spin_unlock(&inode->i_lock);
f41f7418
TM		 4578 nfs_access_zap_cache(inode);
4579 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4580 return ret;
4581}
4582
16b4289c
TM		 4583static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4584{
4585 struct nfs4_exception exception = { };
4586 int err;
4587 do {
c1578b76
TM		 4588 err = __nfs4_proc_set_acl(inode, buf, buflen);
4589 trace_nfs4_set_acl(inode, err);
4590 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4591 &exception);
4592 } while (exception.retry);
4593 return err;
4594}
4595
aa9c2669
DQ		 4596#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4597static int _nfs4_get_security_label(struct inode *inode, void *buf,
4598 size_t buflen)
4599{
4600 struct nfs_server *server = NFS_SERVER(inode);
4601 struct nfs_fattr fattr;
4602 struct nfs4_label label = {0, 0, buflen, buf};
4603
4604 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4605 struct nfs4_getattr_arg args = {
4606 .fh = NFS_FH(inode),
4607 .bitmask = bitmask,
4608 };
4609 struct nfs4_getattr_res res = {
4610 .fattr = &fattr,
4611 .label = &label,
4612 .server = server,
4613 };
4614 struct rpc_message msg = {
4615 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4616 .rpc_argp = &args,
4617 .rpc_resp = &res,
4618 };
4619 int ret;
4620
4621 nfs_fattr_init(&fattr);
4622
4623 ret = rpc_call_sync(server->client, &msg, 0);
4624 if (ret)
4625 return ret;
4626 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4627 return -ENOENT;
4628 if (buflen < label.len)
4629 return -ERANGE;
4630 return 0;
4631}
4632
4633static int nfs4_get_security_label(struct inode *inode, void *buf,
4634 size_t buflen)
4635{
4636 struct nfs4_exception exception = { };
4637 int err;
4638
4639 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4640 return -EOPNOTSUPP;
4641
4642 do {
c1578b76
TM		 4643 err = _nfs4_get_security_label(inode, buf, buflen);
4644 trace_nfs4_get_security_label(inode, err);
4645 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4646 &exception);
4647 } while (exception.retry);
4648 return err;
4649}
4650
4651static int _nfs4_do_set_security_label(struct inode *inode,
4652 struct nfs4_label *ilabel,
4653 struct nfs_fattr *fattr,
4654 struct nfs4_label *olabel)
4655{
4656
4657 struct iattr sattr = {0};
4658 struct nfs_server *server = NFS_SERVER(inode);
4659 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4660 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4661 .fh = NFS_FH(inode),
4662 .iap = &sattr,
4663 .server = server,
4664 .bitmask = bitmask,
4665 .label = ilabel,
4666 };
4667 struct nfs_setattrres res = {
4668 .fattr = fattr,
4669 .label = olabel,
4670 .server = server,
4671 };
4672 struct rpc_message msg = {
4673 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4674 .rpc_argp = &arg,
aa9c2669
DQ		 4675 .rpc_resp = &res,
4676 };
4677 int status;
4678
12207f69 4679 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4680
12207f69 4681 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4682 if (status)
4683 dprintk("%s failed: %d\n", __func__, status);
4684
4685 return status;
4686}
4687
4688static int nfs4_do_set_security_label(struct inode *inode,
4689 struct nfs4_label *ilabel,
4690 struct nfs_fattr *fattr,
4691 struct nfs4_label *olabel)
4692{
4693 struct nfs4_exception exception = { };
4694 int err;
4695
4696 do {
c1578b76
TM		 4697 err = _nfs4_do_set_security_label(inode, ilabel,
4698 fattr, olabel);
4699 trace_nfs4_set_security_label(inode, err);
4700 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4701 &exception);
4702 } while (exception.retry);
4703 return err;
4704}
4705
4706static int
4707nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4708{
4709 struct nfs4_label ilabel, *olabel = NULL;
4710 struct nfs_fattr fattr;
4711 struct rpc_cred *cred;
4712 struct inode *inode = dentry->d_inode;
4713 int status;
4714
4715 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4716 return -EOPNOTSUPP;
4717
4718 nfs_fattr_init(&fattr);
4719
4720 ilabel.pi = 0;
4721 ilabel.lfs = 0;
4722 ilabel.label = (char *)buf;
4723 ilabel.len = buflen;
4724
4725 cred = rpc_lookup_cred();
4726 if (IS_ERR(cred))
4727 return PTR_ERR(cred);
4728
4729 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4730 if (IS_ERR(olabel)) {
4731 status = -PTR_ERR(olabel);
4732 goto out;
4733 }
4734
4735 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4736 if (status == 0)
4737 nfs_setsecurity(inode, &fattr, olabel);
4738
4739 nfs4_label_free(olabel);
4740out:
4741 put_rpccred(cred);
4742 return status;
4743}
4744#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4745
4746
1da177e4 4747static int
aa5190d0 4748nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4749{
aa5190d0
TM		 4750 struct nfs_client *clp = server->nfs_client;
4751
4752 if (task->tk_status >= 0)
1da177e4
LT		 4753 return 0;
4754 switch(task->tk_status) {
a1d0b5ee 4755 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4756 case -NFS4ERR_ADMIN_REVOKED:
4757 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4758 if (state == NULL)
4759 break;
4760 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4761 case -NFS4ERR_OPENMODE:
4762 if (state == NULL)
4763 break;
5d422301 4764 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4765 goto recovery_failed;
0400a6b0 4766 goto wait_on_recovery;
0ced63d1 4767 case -NFS4ERR_EXPIRED:
5d422301
TM		 4768 if (state != NULL) {
4769 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4770 goto recovery_failed;
5d422301 4771 }
1da177e4 4772 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4773 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4774 nfs4_schedule_lease_recovery(clp);
4775 goto wait_on_recovery;
519ae255
CL		 4776 case -NFS4ERR_MOVED:
4777 if (nfs4_schedule_migration_recovery(server) < 0)
4778 goto recovery_failed;
4779 goto wait_on_recovery;
8ef2f8d4
CL		 4780 case -NFS4ERR_LEASE_MOVED:
4781 nfs4_schedule_lease_moved_recovery(clp);
4782 goto wait_on_recovery;
4745e315
AA		 4783#if defined(CONFIG_NFS_V4_1)
4784 case -NFS4ERR_BADSESSION:
4785 case -NFS4ERR_BADSLOT:
4786 case -NFS4ERR_BAD_HIGH_SLOT:
4787 case -NFS4ERR_DEADSESSION:
4788 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4789 case -NFS4ERR_SEQ_FALSE_RETRY:
4790 case -NFS4ERR_SEQ_MISORDERED:
4791 dprintk("%s ERROR %d, Reset session\n", __func__,
4792 task->tk_status);
9f594791 4793 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
f1478c13 4794 goto restart_call;
4745e315 4795#endif /* CONFIG_NFS_V4_1 */
1da177e4 4796 case -NFS4ERR_DELAY:
aa5190d0 4797 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4798 case -NFS4ERR_GRACE:
1da177e4 4799 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4800 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4801 case -NFS4ERR_OLD_STATEID:
f1478c13 4802 goto restart_call;
1da177e4
LT		 4803 }
4804 task->tk_status = nfs4_map_errors(task->tk_status);
4805 return 0;
9f51a78e 4806recovery_failed:
5d422301
TM		 4807 task->tk_status = -EIO;
4808 return 0;
0400a6b0 4809wait_on_recovery:
a2c0b9e2 4810 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4811 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4812 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4813 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4814 goto recovery_failed;
f1478c13 4815restart_call:
a2c0b9e2
TM		 4816 task->tk_status = 0;
4817 return -EAGAIN;
1da177e4
LT		 4818}
4819
f092075d
CL		 4820static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4821 nfs4_verifier *bootverf)
cd93710e
CL		 4822{
4823 __be32 verf[2];
4824
2c820d9a
CL		 4825 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4826 /* An impossible timestamp guarantees this value
4827 * will never match a generated boot time. */
4828 verf[0] = 0;
17f26b12 4829 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4830 } else {
f092075d 4831 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4832 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4833 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4834 }
cd93710e
CL		 4835 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4836}
4837
e984a55a
CL		 4838static unsigned int
4839nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4840 char *buf, size_t len)
4841{
4842 unsigned int result;
4843
4844 rcu_read_lock();
4845 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4846 clp->cl_ipaddr,
4847 rpc_peeraddr2str(clp->cl_rpcclient,
4848 RPC_DISPLAY_ADDR),
4849 rpc_peeraddr2str(clp->cl_rpcclient,
4850 RPC_DISPLAY_PROTO));
4851 rcu_read_unlock();
4852 return result;
4853}
4854
4855static unsigned int
4856nfs4_init_uniform_client_string(const struct nfs_client *clp,
4857 char *buf, size_t len)
4858{
55b59293 4859 const char *nodename = clp->cl_rpcclient->cl_nodename;
6f2ea7f2
CL		 4860
4861 if (nfs4_client_id_uniquifier[0] != '\0')
55b59293
TM		 4862 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4863 clp->rpc_ops->version,
4864 clp->cl_minorversion,
4865 nfs4_client_id_uniquifier,
4866 nodename);
e984a55a
CL		 4867 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4868 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4869 nodename);
e984a55a
CL		 4870}
4871
6bbb4ae8
CL		 4872/**
4873 * nfs4_proc_setclientid - Negotiate client ID
4874 * @clp: state data structure
4875 * @program: RPC program for NFSv4 callback service
4876 * @port: IP port number for NFS4 callback service
4877 * @cred: RPC credential to use for this call
4878 * @res: where to place the result
4879 *
4880 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4881 */
bb8b27e5
TM		 4882int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4883 unsigned short port, struct rpc_cred *cred,
4884 struct nfs4_setclientid_res *res)
1da177e4
LT		 4885{
4886 nfs4_verifier sc_verifier;
4887 struct nfs4_setclientid setclientid = {
4888 .sc_verifier = &sc_verifier,
4889 .sc_prog = program,
f4eecd5d 4890 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4891 };
4892 struct rpc_message msg = {
4893 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4894 .rpc_argp = &setclientid,
bb8b27e5 4895 .rpc_resp = res,
286d7d6a 4896 .rpc_cred = cred,
1da177e4 4897 };
6bbb4ae8 4898 int status;
1da177e4 4899
de734831 4900 /* nfs_client_id4 */
f092075d 4901 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4902 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4903 setclientid.sc_name_len =
4904 nfs4_init_uniform_client_string(clp,
4905 setclientid.sc_name,
4906 sizeof(setclientid.sc_name));
4907 else
4908 setclientid.sc_name_len =
4909 nfs4_init_nonuniform_client_string(clp,
4910 setclientid.sc_name,
4911 sizeof(setclientid.sc_name));
de734831 4912 /* cb_client4 */
e984a55a 4913 rcu_read_lock();
de734831 4914 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
fe2d5395 4915 sizeof(setclientid.sc_netid), "%s",
d4d3c507
CL		 4916 rpc_peeraddr2str(clp->cl_rpcclient,
4917 RPC_DISPLAY_NETID));
de734831
CL		 4918 rcu_read_unlock();
4919 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4920 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4921 clp->cl_ipaddr, port >> 8, port & 255);
4922
6bbb4ae8
CL		 4923 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4924 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4925 setclientid.sc_name_len, setclientid.sc_name);
4926 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4927 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 4928 dprintk("NFS reply setclientid: %d\n", status);
4929 return status;
1da177e4
LT		 4930}
4931
6bbb4ae8
CL		 4932/**
4933 * nfs4_proc_setclientid_confirm - Confirm client ID
4934 * @clp: state data structure
4935 * @res: result of a previous SETCLIENTID
4936 * @cred: RPC credential to use for this call
4937 *
4938 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4939 */
fd954ae1 4940int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4941 struct nfs4_setclientid_res *arg,
4942 struct rpc_cred *cred)
1da177e4 4943{
1da177e4
LT		 4944 struct rpc_message msg = {
4945 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4946 .rpc_argp = arg,
286d7d6a 4947 .rpc_cred = cred,
1da177e4 4948 };
1da177e4
LT		 4949 int status;
4950
6bbb4ae8
CL		 4951 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4952 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4953 clp->cl_clientid);
1bd714f2 4954 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4955 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 4956 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4957 return status;
4958}
4959
fe650407
TM		 4960struct nfs4_delegreturndata {
4961 struct nfs4_delegreturnargs args;
fa178f29 4962 struct nfs4_delegreturnres res;
fe650407
TM		 4963 struct nfs_fh fh;
4964 nfs4_stateid stateid;
26e976a8 4965 unsigned long timestamp;
fa178f29 4966 struct nfs_fattr fattr;
fe650407
TM		 4967 int rpc_status;
4968};
4969
fe650407
TM		 4970static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4971{
4972 struct nfs4_delegreturndata *data = calldata;
938e1010 4973
14516c3a
TM		 4974 if (!nfs4_sequence_done(task, &data->res.seq_res))
4975 return;
938e1010 4976
ca8acf8d 4977 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861
RL		 4978 switch (task->tk_status) {
4979 case -NFS4ERR_STALE_STATEID:
4980 case -NFS4ERR_EXPIRED:
4981 case 0:
fa178f29 4982 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4983 break;
4984 default:
4985 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4986 -EAGAIN) {
d00c5d43 4987 rpc_restart_call_prepare(task);
79708861
RL		 4988 return;
4989 }
4990 }
4991 data->rpc_status = task->tk_status;
fe650407
TM		 4992}
4993
4994static void nfs4_delegreturn_release(void *calldata)
4995{
fe650407
TM		 4996 kfree(calldata);
4997}
4998
938e1010
AA		 4999static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5000{
5001 struct nfs4_delegreturndata *d_data;
5002
5003 d_data = (struct nfs4_delegreturndata *)data;
5004
d9afbd1b
TM		 5005 nfs4_setup_sequence(d_data->res.server,
5006 &d_data->args.seq_args,
5007 &d_data->res.seq_res,
5008 task);
938e1010 5009}
938e1010 5010
c8d149f3 5011static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5012 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5013 .rpc_call_done = nfs4_delegreturn_done,
5014 .rpc_release = nfs4_delegreturn_release,
5015};
5016
e6f81075 5017static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5018{
5019 struct nfs4_delegreturndata *data;
fa178f29 5020 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5021 struct rpc_task *task;
5138fde0
TM		 5022 struct rpc_message msg = {
5023 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5024 .rpc_cred = cred,
5025 };
c970aa85
TM		 5026 struct rpc_task_setup task_setup_data = {
5027 .rpc_client = server->client,
5138fde0 5028 .rpc_message = &msg,
c970aa85
TM		 5029 .callback_ops = &nfs4_delegreturn_ops,
5030 .flags = RPC_TASK_ASYNC,
5031 };
e6f81075 5032 int status = 0;
fe650407 5033
8535b2be 5034 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5035 if (data == NULL)
5036 return -ENOMEM;
a9c92d6b 5037 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5038 data->args.fhandle = &data->fh;
5039 data->args.stateid = &data->stateid;
9e907fec 5040 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5041 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5042 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5043 data->res.fattr = &data->fattr;
5044 data->res.server = server;
5138fde0 5045 nfs_fattr_init(data->res.fattr);
26e976a8 5046 data->timestamp = jiffies;
fe650407
TM		 5047 data->rpc_status = 0;
5048
c970aa85 5049 task_setup_data.callback_data = data;
1174dd1f
TM		 5050 msg.rpc_argp = &data->args;
5051 msg.rpc_resp = &data->res;
c970aa85 5052 task = rpc_run_task(&task_setup_data);
7a1218a2 5053 if (IS_ERR(task))
fe650407 5054 return PTR_ERR(task);
e6f81075
TM		 5055 if (!issync)
5056 goto out;
fe650407 5057 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5058 if (status != 0)
5059 goto out;
5060 status = data->rpc_status;
e144cbcc
TM		 5061 if (status == 0)
5062 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5063 else
5064 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5065out:
e6b3c4db 5066 rpc_put_task(task);
fe650407 5067 return status;
1da177e4
LT		 5068}
5069
e6f81075 5070int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5071{
5072 struct nfs_server *server = NFS_SERVER(inode);
5073 struct nfs4_exception exception = { };
5074 int err;
5075 do {
e6f81075 5076 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5077 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5078 switch (err) {
5079 case -NFS4ERR_STALE_STATEID:
5080 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5081 case 0:
5082 return 0;
5083 }
5084 err = nfs4_handle_exception(server, err, &exception);
5085 } while (exception.retry);
5086 return err;
5087}
5088
5089#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5090#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5091
5092/*
5093 * sleep, with exponential backoff, and retry the LOCK operation.
5094 */
5095static unsigned long
5096nfs4_set_lock_task_retry(unsigned long timeout)
5097{
416ad3c9 5098 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5099 timeout <<= 1;
5100 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5101 return NFS4_LOCK_MAXTIMEOUT;
5102 return timeout;
5103}
5104
1da177e4
LT		 5105static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5106{
5107 struct inode *inode = state->inode;
5108 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5109 struct nfs_client *clp = server->nfs_client;
911d1aaf 5110 struct nfs_lockt_args arg = {
1da177e4 5111 .fh = NFS_FH(inode),
911d1aaf 5112 .fl = request,
1da177e4 5113 };
911d1aaf
TM		 5114 struct nfs_lockt_res res = {
5115 .denied = request,
1da177e4
LT		 5116 };
5117 struct rpc_message msg = {
5118 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5119 .rpc_argp = &arg,
5120 .rpc_resp = &res,
5121 .rpc_cred = state->owner->so_cred,
5122 };
1da177e4
LT		 5123 struct nfs4_lock_state *lsp;
5124 int status;
5125
911d1aaf 5126 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5127 status = nfs4_set_lock_state(state, request);
5128 if (status != 0)
5129 goto out;
5130 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5131 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5132 arg.lock_owner.s_dev = server->s_dev;
7c513058 5133 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5134 switch (status) {
5135 case 0:
5136 request->fl_type = F_UNLCK;
5137 break;
5138 case -NFS4ERR_DENIED:
5139 status = 0;
1da177e4 5140 }
70cc6487 5141 request->fl_ops->fl_release_private(request);
a6f951dd 5142 request->fl_ops = NULL;
8d0a8a9d 5143out:
1da177e4
LT		 5144 return status;
5145}
5146
5147static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5148{
5149 struct nfs4_exception exception = { };
5150 int err;
5151
5152 do {
d1b748a5
TM		 5153 err = _nfs4_proc_getlk(state, cmd, request);
5154 trace_nfs4_get_lock(request, state, cmd, err);
5155 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5156 &exception);
5157 } while (exception.retry);
5158 return err;
5159}
5160
5161static int do_vfs_lock(struct file *file, struct file_lock *fl)
5162{
5163 int res = 0;
5164 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5165 case FL_POSIX:
5166 res = posix_lock_file_wait(file, fl);
5167 break;
5168 case FL_FLOCK:
5169 res = flock_lock_file_wait(file, fl);
5170 break;
5171 default:
5172 BUG();
5173 }
1da177e4
LT		 5174 return res;
5175}
5176
faf5f49c 5177struct nfs4_unlockdata {
911d1aaf
TM		 5178 struct nfs_locku_args arg;
5179 struct nfs_locku_res res;
faf5f49c
TM		 5180 struct nfs4_lock_state *lsp;
5181 struct nfs_open_context *ctx;
911d1aaf
TM		 5182 struct file_lock fl;
5183 const struct nfs_server *server;
26e976a8 5184 unsigned long timestamp;
faf5f49c
TM		 5185};
5186
911d1aaf
TM		 5187static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5188 struct nfs_open_context *ctx,
5189 struct nfs4_lock_state *lsp,
5190 struct nfs_seqid *seqid)
5191{
5192 struct nfs4_unlockdata *p;
5193 struct inode *inode = lsp->ls_state->inode;
5194
8535b2be 5195 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5196 if (p == NULL)
5197 return NULL;
5198 p->arg.fh = NFS_FH(inode);
5199 p->arg.fl = &p->fl;
5200 p->arg.seqid = seqid;
c1d51931 5201 p->res.seqid = seqid;
911d1aaf
TM		 5202 p->arg.stateid = &lsp->ls_stateid;
5203 p->lsp = lsp;
5204 atomic_inc(&lsp->ls_count);
5205 /* Ensure we don't close file until we're done freeing locks! */
5206 p->ctx = get_nfs_open_context(ctx);
5207 memcpy(&p->fl, fl, sizeof(p->fl));
5208 p->server = NFS_SERVER(inode);
5209 return p;
5210}
5211
06f814a3 5212static void nfs4_locku_release_calldata(void *data)
faf5f49c 5213{
963d8fe5 5214 struct nfs4_unlockdata *calldata = data;
911d1aaf 5215 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5216 nfs4_put_lock_state(calldata->lsp);
5217 put_nfs_open_context(calldata->ctx);
5218 kfree(calldata);
faf5f49c
TM		 5219}
5220
963d8fe5 5221static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5222{
963d8fe5 5223 struct nfs4_unlockdata *calldata = data;
faf5f49c 5224
14516c3a
TM		 5225 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5226 return;
faf5f49c
TM		 5227 switch (task->tk_status) {
5228 case 0:
f597c537
TM		 5229 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5230 &calldata->res.stateid);
26e976a8 5231 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5232 break;
9e33bed5
TM		 5233 case -NFS4ERR_BAD_STATEID:
5234 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5235 case -NFS4ERR_STALE_STATEID:
5236 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5237 break;
5238 default:
9e33bed5 5239 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 5240 rpc_restart_call_prepare(task);
faf5f49c 5241 }
2b1bc308 5242 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5243}
5244
4ce70ada 5245static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5246{
4ce70ada 5247 struct nfs4_unlockdata *calldata = data;
faf5f49c 5248
911d1aaf 5249 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5250 goto out_wait;
795a88c9 5251 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5252 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5253 goto out_no_action;
faf5f49c 5254 }
26e976a8 5255 calldata->timestamp = jiffies;
035168ab 5256 if (nfs4_setup_sequence(calldata->server,
a893693c 5257 &calldata->arg.seq_args,
2240a9e2
TM		 5258 &calldata->res.seq_res,
5259 task) != 0)
5260 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5261 return;
5262out_no_action:
5263 task->tk_action = NULL;
5264out_wait:
5265 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5266}
5267
963d8fe5 5268static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5269 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5270 .rpc_call_done = nfs4_locku_done,
06f814a3 5271 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5272};
5273
a5d16a4d
TM		 5274static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5275 struct nfs_open_context *ctx,
5276 struct nfs4_lock_state *lsp,
5277 struct nfs_seqid *seqid)
5278{
5279 struct nfs4_unlockdata *data;
5138fde0
TM		 5280 struct rpc_message msg = {
5281 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5282 .rpc_cred = ctx->cred,
5283 };
c970aa85
TM		 5284 struct rpc_task_setup task_setup_data = {
5285 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5286 .rpc_message = &msg,
c970aa85 5287 .callback_ops = &nfs4_locku_ops,
101070ca 5288 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5289 .flags = RPC_TASK_ASYNC,
5290 };
a5d16a4d 5291
fa940720
WAA		 5292 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5293 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5294
137d6aca
FF		 5295 /* Ensure this is an unlock - when canceling a lock, the
5296 * canceled lock is passed in, and it won't be an unlock.
5297 */
5298 fl->fl_type = F_UNLCK;
5299
a5d16a4d
TM		 5300 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5301 if (data == NULL) {
5302 nfs_free_seqid(seqid);
5303 return ERR_PTR(-ENOMEM);
5304 }
5305
a9c92d6b 5306 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5307 msg.rpc_argp = &data->arg;
5308 msg.rpc_resp = &data->res;
c970aa85
TM		 5309 task_setup_data.callback_data = data;
5310 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5311}
5312
faf5f49c
TM		 5313static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5314{
65b62a29
TM		 5315 struct inode *inode = state->inode;
5316 struct nfs4_state_owner *sp = state->owner;
5317 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5318 struct nfs_seqid *seqid;
1da177e4 5319 struct nfs4_lock_state *lsp;
06f814a3
TM		 5320 struct rpc_task *task;
5321 int status = 0;
536ff0f8 5322 unsigned char fl_flags = request->fl_flags;
faf5f49c 5323
8d0a8a9d 5324 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5325 /* Unlock _before_ we do the RPC call */
5326 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5327 /* Exclude nfs_delegation_claim_locks() */
5328 mutex_lock(&sp->so_delegreturn_mutex);
5329 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5330 down_read(&nfsi->rwsem);
5331 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5332 up_read(&nfsi->rwsem);
65b62a29 5333 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5334 goto out;
19e03c57
TM		 5335 }
5336 up_read(&nfsi->rwsem);
65b62a29 5337 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5338 if (status != 0)
9b073574
TM		 5339 goto out;
5340 /* Is this a delegated lock? */
8d0a8a9d 5341 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5342 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5343 goto out;
8535b2be 5344 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5345 status = -ENOMEM;
911d1aaf 5346 if (seqid == NULL)
9b073574 5347 goto out;
cd3758e3 5348 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5349 status = PTR_ERR(task);
5350 if (IS_ERR(task))
9b073574 5351 goto out;
a5d16a4d 5352 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5353 rpc_put_task(task);
9b073574 5354out:
536ff0f8 5355 request->fl_flags = fl_flags;
d1b748a5 5356 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5357 return status;
5358}
5359
a5d16a4d
TM		 5360struct nfs4_lockdata {
5361 struct nfs_lock_args arg;
5362 struct nfs_lock_res res;
5363 struct nfs4_lock_state *lsp;
5364 struct nfs_open_context *ctx;
5365 struct file_lock fl;
26e976a8 5366 unsigned long timestamp;
a5d16a4d
TM		 5367 int rpc_status;
5368 int cancelled;
66179efe 5369 struct nfs_server *server;
a5d16a4d
TM		 5370};
5371
5372static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5373 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5374 gfp_t gfp_mask)
1da177e4 5375{
a5d16a4d
TM		 5376 struct nfs4_lockdata *p;
5377 struct inode *inode = lsp->ls_state->inode;
1da177e4 5378 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5379
8535b2be 5380 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5381 if (p == NULL)
5382 return NULL;
5383
5384 p->arg.fh = NFS_FH(inode);
5385 p->arg.fl = &p->fl;
8535b2be 5386 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5387 if (p->arg.open_seqid == NULL)
5388 goto out_free;
8535b2be 5389 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5390 if (p->arg.lock_seqid == NULL)
2f74c0a0 5391 goto out_free_seqid;
a5d16a4d 5392 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5393 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5394 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5395 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5396 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5397 p->lsp = lsp;
66179efe 5398 p->server = server;
a5d16a4d
TM		 5399 atomic_inc(&lsp->ls_count);
5400 p->ctx = get_nfs_open_context(ctx);
5401 memcpy(&p->fl, fl, sizeof(p->fl));
5402 return p;
2f74c0a0
TM		 5403out_free_seqid:
5404 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5405out_free:
5406 kfree(p);
5407 return NULL;
5408}
5409
5410static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5411{
5412 struct nfs4_lockdata *data = calldata;
5413 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5414
3110ff80 5415 dprintk("%s: begin!\n", __func__);
2f74c0a0 5416 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5417 goto out_wait;
a5d16a4d
TM		 5418 /* Do we need to do an open_to_lock_owner? */
5419 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5420 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5421 goto out_release_lock_seqid;
8fe72bac 5422 }
8e472f33 5423 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5424 data->arg.new_lock_owner = 1;
c1d51931 5425 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5426 } else
5427 data->arg.new_lock_owner = 0;
5d422301
TM		 5428 if (!nfs4_valid_open_stateid(state)) {
5429 data->rpc_status = -EBADF;
5430 task->tk_action = NULL;
5431 goto out_release_open_seqid;
5432 }
26e976a8 5433 data->timestamp = jiffies;
035168ab
TM		 5434 if (nfs4_setup_sequence(data->server,
5435 &data->arg.seq_args,
2240a9e2 5436 &data->res.seq_res,
d9afbd1b 5437 task) == 0)
66179efe 5438 return;
5d422301 5439out_release_open_seqid:
2240a9e2
TM		 5440 nfs_release_seqid(data->arg.open_seqid);
5441out_release_lock_seqid:
5442 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5443out_wait:
5444 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5445 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5446}
5447
a5d16a4d
TM		 5448static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5449{
5450 struct nfs4_lockdata *data = calldata;
5451
3110ff80 5452 dprintk("%s: begin!\n", __func__);
a5d16a4d 5453
14516c3a
TM		 5454 if (!nfs4_sequence_done(task, &data->res.seq_res))
5455 return;
66179efe 5456
a5d16a4d 5457 data->rpc_status = task->tk_status;
a5d16a4d 5458 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5459 if (data->rpc_status == 0)
5460 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5461 else
5462 goto out;
5463 }
5464 if (data->rpc_status == 0) {
f597c537 5465 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5466 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5467 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5468 }
a5d16a4d 5469out:
3110ff80 5470 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5471}
5472
5473static void nfs4_lock_release(void *calldata)
5474{
5475 struct nfs4_lockdata *data = calldata;
5476
3110ff80 5477 dprintk("%s: begin!\n", __func__);
2f74c0a0 5478 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5479 if (data->cancelled != 0) {
5480 struct rpc_task *task;
5481 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5482 data->arg.lock_seqid);
5483 if (!IS_ERR(task))
bf294b41 5484 rpc_put_task_async(task);
3110ff80 5485 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5486 } else
5487 nfs_free_seqid(data->arg.lock_seqid);
5488 nfs4_put_lock_state(data->lsp);
5489 put_nfs_open_context(data->ctx);
5490 kfree(data);
3110ff80 5491 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5492}
5493
5494static const struct rpc_call_ops nfs4_lock_ops = {
5495 .rpc_call_prepare = nfs4_lock_prepare,
5496 .rpc_call_done = nfs4_lock_done,
5497 .rpc_release = nfs4_lock_release,
5498};
5499
2bee72a6
TM		 5500static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5501{
2bee72a6
TM		 5502 switch (error) {
5503 case -NFS4ERR_ADMIN_REVOKED:
5504 case -NFS4ERR_BAD_STATEID:
ecac799a 5505 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5506 if (new_lock_owner != 0 ||
795a88c9 5507 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5508 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5509 break;
5510 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5511 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5512 case -NFS4ERR_EXPIRED:
5513 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5514 };
5515}
5516
afe6c27c 5517static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5518{
5519 struct nfs4_lockdata *data;
5520 struct rpc_task *task;
5138fde0
TM		 5521 struct rpc_message msg = {
5522 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5523 .rpc_cred = state->owner->so_cred,
5524 };
c970aa85
TM		 5525 struct rpc_task_setup task_setup_data = {
5526 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5527 .rpc_message = &msg,
c970aa85 5528 .callback_ops = &nfs4_lock_ops,
101070ca 5529 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5530 .flags = RPC_TASK_ASYNC,
5531 };
a5d16a4d
TM		 5532 int ret;
5533
3110ff80 5534 dprintk("%s: begin!\n", __func__);
cd3758e3 5535 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5536 fl->fl_u.nfs4_fl.owner,
5537 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5538 if (data == NULL)
5539 return -ENOMEM;
5540 if (IS_SETLKW(cmd))
5541 data->arg.block = 1;
a9c92d6b 5542 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5543 msg.rpc_argp = &data->arg;
5544 msg.rpc_resp = &data->res;
c970aa85 5545 task_setup_data.callback_data = data;
8fe72bac
TM		 5546 if (recovery_type > NFS_LOCK_NEW) {
5547 if (recovery_type == NFS_LOCK_RECLAIM)
5548 data->arg.reclaim = NFS_LOCK_RECLAIM;
5549 nfs4_set_sequence_privileged(&data->arg.seq_args);
5550 }
c970aa85 5551 task = rpc_run_task(&task_setup_data);
7a1218a2 5552 if (IS_ERR(task))
a5d16a4d 5553 return PTR_ERR(task);
a5d16a4d
TM		 5554 ret = nfs4_wait_for_completion_rpc_task(task);
5555 if (ret == 0) {
5556 ret = data->rpc_status;
2bee72a6
TM		 5557 if (ret)
5558 nfs4_handle_setlk_error(data->server, data->lsp,
5559 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5560 } else
5561 data->cancelled = 1;
e6b3c4db 5562 rpc_put_task(task);
3110ff80 5563 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5564 return ret;
1da177e4
LT		 5565}
5566
5567static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5568{
202b50dc 5569 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5570 struct nfs4_exception exception = {
5571 .inode = state->inode,
5572 };
202b50dc
TM		 5573 int err;
5574
5575 do {
42a2d13e
TM		 5576 /* Cache the lock if possible... */
5577 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5578 return 0;
afe6c27c 5579 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5580 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5581 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5582 break;
5583 nfs4_handle_exception(server, err, &exception);
5584 } while (exception.retry);
5585 return err;
1da177e4
LT		 5586}
5587
5588static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5589{
202b50dc 5590 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5591 struct nfs4_exception exception = {
5592 .inode = state->inode,
5593 };
202b50dc
TM		 5594 int err;
5595
6bfc93ef
TM		 5596 err = nfs4_set_lock_state(state, request);
5597 if (err != 0)
5598 return err;
f6de7a39 5599 if (!recover_lost_locks) {
ef1820f9
N		 5600 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5601 return 0;
5602 }
202b50dc 5603 do {
42a2d13e
TM		 5604 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5605 return 0;
afe6c27c 5606 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5607 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5608 switch (err) {
5609 default:
5610 goto out;
5611 case -NFS4ERR_GRACE:
5612 case -NFS4ERR_DELAY:
5613 nfs4_handle_exception(server, err, &exception);
5614 err = 0;
5615 }
202b50dc 5616 } while (exception.retry);
a9ed2e25 5617out:
202b50dc 5618 return err;
1da177e4
LT		 5619}
5620
f062eb6c 5621#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5622/**
5623 * nfs41_check_expired_locks - possibly free a lock stateid
5624 *
5625 * @state: NFSv4 state for an inode
5626 *
5627 * Returns NFS_OK if recovery for this stateid is now finished.
5628 * Otherwise a negative NFS4ERR value is returned.
5629 */
b01dd1d8 5630static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5631{
eb64cf96 5632 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5633 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5634 struct nfs_server *server = NFS_SERVER(state->inode);
5635
b01dd1d8 5636 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5637 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5638 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5639
5640 status = nfs41_test_stateid(server,
5641 &lsp->ls_stateid,
5642 cred);
08cb47fa 5643 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5644 if (status != NFS_OK) {
3e60ffdd
CL		 5645 /* Free the stateid unless the server
5646 * informs us the stateid is unrecognized. */
89af2739
CL		 5647 if (status != -NFS4ERR_BAD_STATEID)
5648 nfs41_free_stateid(server,
ab7cb0df
TM		 5649 &lsp->ls_stateid,
5650 cred);
795a88c9 5651 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5652 ret = status;
5653 }
5654 }
5655 };
5656
5657 return ret;
5658}
5659
5660static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5661{
5662 int status = NFS_OK;
5663
5664 if (test_bit(LK_STATE_IN_USE, &state->flags))
5665 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5666 if (status != NFS_OK)
5667 status = nfs4_lock_expired(state, request);
5668 return status;
f062eb6c
BS		 5669}
5670#endif
5671
1da177e4
LT		 5672static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5673{
9a99af49 5674 struct nfs4_state_owner *sp = state->owner;
19e03c57 5675 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5676 unsigned char fl_flags = request->fl_flags;
9a99af49 5677 unsigned int seq;
8e469ebd 5678 int status = -ENOLCK;
1da177e4 5679
8e469ebd
TM		 5680 if ((fl_flags & FL_POSIX) &&
5681 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5682 goto out;
6bfc93ef 5683 /* Is this a delegated open? */
6bfc93ef
TM		 5684 status = nfs4_set_lock_state(state, request);
5685 if (status != 0)
5686 goto out;
01c3b861
TM		 5687 request->fl_flags |= FL_ACCESS;
5688 status = do_vfs_lock(request->fl_file, request);
5689 if (status < 0)
5690 goto out;
19e03c57 5691 down_read(&nfsi->rwsem);
01c3b861 5692 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5693 /* Yes: cache locks! */
01c3b861 5694 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5695 request->fl_flags = fl_flags & ~FL_SLEEP;
5696 status = do_vfs_lock(request->fl_file, request);
5697 goto out_unlock;
01c3b861 5698 }
9a99af49
TM		 5699 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5700 up_read(&nfsi->rwsem);
afe6c27c 5701 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5702 if (status != 0)
9a99af49
TM		 5703 goto out;
5704 down_read(&nfsi->rwsem);
5705 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5706 status = -NFS4ERR_DELAY;
01c3b861 5707 goto out_unlock;
9a99af49 5708 }
6bfc93ef 5709 /* Note: we always want to sleep here! */
01c3b861 5710 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5711 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5712 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5713 "manager!\n", __func__);
01c3b861 5714out_unlock:
19e03c57 5715 up_read(&nfsi->rwsem);
01c3b861
TM		 5716out:
5717 request->fl_flags = fl_flags;
1da177e4
LT		 5718 return status;
5719}
5720
5721static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5722{
a1d0b5ee
TM		 5723 struct nfs4_exception exception = {
5724 .state = state,
05ffe24f 5725 .inode = state->inode,
a1d0b5ee 5726 };
1da177e4
LT		 5727 int err;
5728
5729 do {
965b5d67 5730 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5731 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5732 if (err == -NFS4ERR_DENIED)
5733 err = -EAGAIN;
1da177e4 5734 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5735 err, &exception);
1da177e4
LT		 5736 } while (exception.retry);
5737 return err;
5738}
5739
5740static int
5741nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5742{
5743 struct nfs_open_context *ctx;
5744 struct nfs4_state *state;
5745 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5746 int status;
5747
5748 /* verify open state */
cd3758e3 5749 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5750 state = ctx->state;
5751
5752 if (request->fl_start < 0 || request->fl_end < 0)
5753 return -EINVAL;
5754
d953126a
TM		 5755 if (IS_GETLK(cmd)) {
5756 if (state != NULL)
5757 return nfs4_proc_getlk(state, F_GETLK, request);
5758 return 0;
5759 }
1da177e4
LT		 5760
5761 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5762 return -EINVAL;
5763
d953126a
TM		 5764 if (request->fl_type == F_UNLCK) {
5765 if (state != NULL)
5766 return nfs4_proc_unlck(state, cmd, request);
5767 return 0;
5768 }
1da177e4 5769
d953126a
TM		 5770 if (state == NULL)
5771 return -ENOLCK;
55725513
TM		 5772 /*
5773 * Don't rely on the VFS having checked the file open mode,
5774 * since it won't do this for flock() locks.
5775 */
f44106e2 5776 switch (request->fl_type) {
55725513
TM		 5777 case F_RDLCK:
5778 if (!(filp->f_mode & FMODE_READ))
5779 return -EBADF;
5780 break;
5781 case F_WRLCK:
5782 if (!(filp->f_mode & FMODE_WRITE))
5783 return -EBADF;
5784 }
5785
1da177e4
LT		 5786 do {
5787 status = nfs4_proc_setlk(state, cmd, request);
5788 if ((status != -EAGAIN) || IS_SETLK(cmd))
5789 break;
5790 timeout = nfs4_set_lock_task_retry(timeout);
5791 status = -ERESTARTSYS;
5792 if (signalled())
5793 break;
5794 } while(status < 0);
1da177e4
LT		 5795 return status;
5796}
5797
db4f2e63 5798int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5799{
5800 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5801 int err;
5802
5803 err = nfs4_set_lock_state(state, fl);
5804 if (err != 0)
db4f2e63 5805 return err;
4a706fa0 5806 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5807 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5808}
6b3b5496 5809
cf470c3e
TM		 5810struct nfs_release_lockowner_data {
5811 struct nfs4_lock_state *lsp;
5ae67c4f 5812 struct nfs_server *server;
cf470c3e 5813 struct nfs_release_lockowner_args args;
fbd4bfd1
CL		 5814 struct nfs4_sequence_args seq_args;
5815 struct nfs4_sequence_res seq_res;
60ea6812 5816 unsigned long timestamp;
cf470c3e
TM		 5817};
5818
fbd4bfd1
CL		 5819static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5820{
5821 struct nfs_release_lockowner_data *data = calldata;
5822 nfs40_setup_sequence(data->server,
5823 &data->seq_args, &data->seq_res, task);
60ea6812 5824 data->timestamp = jiffies;
fbd4bfd1
CL		 5825}
5826
5827static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
5828{
5829 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 5830 struct nfs_server *server = data->server;
5831
fbd4bfd1 5832 nfs40_sequence_done(task, &data->seq_res);
60ea6812
CL		 5833
5834 switch (task->tk_status) {
5835 case 0:
5836 renew_lease(server, data->timestamp);
5837 break;
5838 case -NFS4ERR_STALE_CLIENTID:
5839 case -NFS4ERR_EXPIRED:
5840 case -NFS4ERR_LEASE_MOVED:
5841 case -NFS4ERR_DELAY:
5842 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN)
5843 rpc_restart_call_prepare(task);
5844 }
fbd4bfd1
CL		 5845}
5846
d3c7b7cc
TM		 5847static void nfs4_release_lockowner_release(void *calldata)
5848{
cf470c3e 5849 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5850 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5851 kfree(calldata);
5852}
5853
17280175 5854static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 5855 .rpc_call_prepare = nfs4_release_lockowner_prepare,
5856 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 5857 .rpc_release = nfs4_release_lockowner_release,
5858};
5859
c8b2d0bf 5860static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5861{
cf470c3e 5862 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5863 struct rpc_message msg = {
5864 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5865 };
5866
5867 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e 5868 return -EINVAL;
fbd4bfd1 5869
cf470c3e
TM		 5870 data = kmalloc(sizeof(*data), GFP_NOFS);
5871 if (!data)
5872 return -ENOMEM;
fbd4bfd1 5873 nfs4_init_sequence(&data->seq_args, &data->seq_res, 0);
cf470c3e 5874 data->lsp = lsp;
5ae67c4f 5875 data->server = server;
cf470c3e
TM		 5876 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5877 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5878 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 5879
cf470c3e
TM		 5880 msg.rpc_argp = &data->args;
5881 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5882 return 0;
d3c7b7cc
TM		 5883}
5884
aa1870af
BF		 5885#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5886
64c2ce8b
AK		 5887static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5888 const void *buf, size_t buflen,
5889 int flags, int type)
6b3b5496 5890{
64c2ce8b
AK		 5891 if (strcmp(key, "") != 0)
5892 return -EINVAL;
4b580ee3 5893
64c2ce8b 5894 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5895}
5896
64c2ce8b
AK		 5897static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5898 void *buf, size_t buflen, int type)
6b3b5496 5899{
64c2ce8b
AK		 5900 if (strcmp(key, "") != 0)
5901 return -EINVAL;
aa1870af 5902
64c2ce8b 5903 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5904}
5905
64c2ce8b
AK		 5906static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5907 size_t list_len, const char *name,
5908 size_t name_len, int type)
6b3b5496 5909{
64c2ce8b 5910 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5911
096455a2
BF		 5912 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5913 return 0;
64c2ce8b
AK		 5914
5915 if (list && len <= list_len)
5916 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5917 return len;
6b3b5496
BF		 5918}
5919
c9bccef6
DQ		 5920#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5921static inline int nfs4_server_supports_labels(struct nfs_server *server)
5922{
5923 return server->caps & NFS_CAP_SECURITY_LABEL;
5924}
5925
5926static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
5927 const void *buf, size_t buflen,
5928 int flags, int type)
5929{
5930 if (security_ismaclabel(key))
5931 return nfs4_set_security_label(dentry, buf, buflen);
5932
5933 return -EOPNOTSUPP;
5934}
5935
5936static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
5937 void *buf, size_t buflen, int type)
5938{
5939 if (security_ismaclabel(key))
5940 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
5941 return -EOPNOTSUPP;
5942}
5943
5944static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
5945 size_t list_len, const char *name,
5946 size_t name_len, int type)
5947{
5948 size_t len = 0;
5949
5950 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
5951 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
5952 if (list && len <= list_len)
5953 security_inode_listsecurity(dentry->d_inode, list, len);
5954 }
5955 return len;
5956}
5957
5958static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
5959 .prefix = XATTR_SECURITY_PREFIX,
5960 .list = nfs4_xattr_list_nfs4_label,
5961 .get = nfs4_xattr_get_nfs4_label,
5962 .set = nfs4_xattr_set_nfs4_label,
5963};
5964#endif
5965
5966
533eb461
AA		 5967/*
5968 * nfs_fhget will use either the mounted_on_fileid or the fileid
5969 */
69aaaae1
TM		 5970static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5971{
533eb461
AA		 5972 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5973 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5974 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5975 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5976 return;
5977
5978 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5979 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5980 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5981 fattr->nlink = 2;
5982}
5983
f05d147f
BS		 5984static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5985 const struct qstr *name,
5986 struct nfs4_fs_locations *fs_locations,
5987 struct page *page)
683b57b4
TM		 5988{
5989 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 5990 u32 bitmask[3] = {
361e624f 5991 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5992 };
5993 struct nfs4_fs_locations_arg args = {
5994 .dir_fh = NFS_FH(dir),
c228fd3a 5995 .name = name,
683b57b4
TM		 5996 .page = page,
5997 .bitmask = bitmask,
5998 };
22958463
BH		 5999 struct nfs4_fs_locations_res res = {
6000 .fs_locations = fs_locations,
6001 };
683b57b4
TM		 6002 struct rpc_message msg = {
6003 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6004 .rpc_argp = &args,
22958463 6005 .rpc_resp = &res,
683b57b4
TM		 6006 };
6007 int status;
6008
3110ff80 6009 dprintk("%s: start\n", __func__);
533eb461
AA		 6010
6011 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6012 * is not supported */
6013 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6014 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6015 else
6016 bitmask[0] |= FATTR4_WORD0_FILEID;
6017
c228fd3a 6018 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6019 fs_locations->server = server;
830b8e33 6020 fs_locations->nlocations = 0;
f05d147f 6021 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6022 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6023 return status;
6024}
6025
f05d147f
BS		 6026int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6027 const struct qstr *name,
6028 struct nfs4_fs_locations *fs_locations,
6029 struct page *page)
db0a9593
BS		 6030{
6031 struct nfs4_exception exception = { };
6032 int err;
6033 do {
078ea3df
TM		 6034 err = _nfs4_proc_fs_locations(client, dir, name,
6035 fs_locations, page);
6036 trace_nfs4_get_fs_locations(dir, name, err);
6037 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6038 &exception);
6039 } while (exception.retry);
6040 return err;
6041}
6042
b03d735b
CL		 6043/*
6044 * This operation also signals the server that this client is
6045 * performing migration recovery. The server can stop returning
6046 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6047 * appended to this compound to identify the client ID which is
6048 * performing recovery.
6049 */
6050static int _nfs40_proc_get_locations(struct inode *inode,
6051 struct nfs4_fs_locations *locations,
6052 struct page *page, struct rpc_cred *cred)
6053{
6054 struct nfs_server *server = NFS_SERVER(inode);
6055 struct rpc_clnt *clnt = server->client;
6056 u32 bitmask[2] = {
6057 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6058 };
6059 struct nfs4_fs_locations_arg args = {
6060 .clientid = server->nfs_client->cl_clientid,
6061 .fh = NFS_FH(inode),
6062 .page = page,
6063 .bitmask = bitmask,
6064 .migration = 1, /* skip LOOKUP */
6065 .renew = 1, /* append RENEW */
6066 };
6067 struct nfs4_fs_locations_res res = {
6068 .fs_locations = locations,
6069 .migration = 1,
6070 .renew = 1,
6071 };
6072 struct rpc_message msg = {
6073 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6074 .rpc_argp = &args,
6075 .rpc_resp = &res,
6076 .rpc_cred = cred,
6077 };
6078 unsigned long now = jiffies;
6079 int status;
6080
6081 nfs_fattr_init(&locations->fattr);
6082 locations->server = server;
6083 locations->nlocations = 0;
6084
6085 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6086 nfs4_set_sequence_privileged(&args.seq_args);
6087 status = nfs4_call_sync_sequence(clnt, server, &msg,
6088 &args.seq_args, &res.seq_res);
6089 if (status)
6090 return status;
6091
6092 renew_lease(server, now);
6093 return 0;
6094}
6095
6096#ifdef CONFIG_NFS_V4_1
6097
6098/*
6099 * This operation also signals the server that this client is
6100 * performing migration recovery. The server can stop asserting
6101 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6102 * performing this operation is identified in the SEQUENCE
6103 * operation in this compound.
6104 *
6105 * When the client supports GETATTR(fs_locations_info), it can
6106 * be plumbed in here.
6107 */
6108static int _nfs41_proc_get_locations(struct inode *inode,
6109 struct nfs4_fs_locations *locations,
6110 struct page *page, struct rpc_cred *cred)
6111{
6112 struct nfs_server *server = NFS_SERVER(inode);
6113 struct rpc_clnt *clnt = server->client;
6114 u32 bitmask[2] = {
6115 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6116 };
6117 struct nfs4_fs_locations_arg args = {
6118 .fh = NFS_FH(inode),
6119 .page = page,
6120 .bitmask = bitmask,
6121 .migration = 1, /* skip LOOKUP */
6122 };
6123 struct nfs4_fs_locations_res res = {
6124 .fs_locations = locations,
6125 .migration = 1,
6126 };
6127 struct rpc_message msg = {
6128 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6129 .rpc_argp = &args,
6130 .rpc_resp = &res,
6131 .rpc_cred = cred,
6132 };
6133 int status;
6134
6135 nfs_fattr_init(&locations->fattr);
6136 locations->server = server;
6137 locations->nlocations = 0;
6138
6139 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6140 nfs4_set_sequence_privileged(&args.seq_args);
6141 status = nfs4_call_sync_sequence(clnt, server, &msg,
6142 &args.seq_args, &res.seq_res);
6143 if (status == NFS4_OK &&
6144 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6145 status = -NFS4ERR_LEASE_MOVED;
6146 return status;
6147}
6148
6149#endif /* CONFIG_NFS_V4_1 */
6150
6151/**
6152 * nfs4_proc_get_locations - discover locations for a migrated FSID
6153 * @inode: inode on FSID that is migrating
6154 * @locations: result of query
6155 * @page: buffer
6156 * @cred: credential to use for this operation
6157 *
6158 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6159 * operation failed, or a negative errno if a local error occurred.
6160 *
6161 * On success, "locations" is filled in, but if the server has
6162 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6163 * asserted.
6164 *
6165 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6166 * from this client that require migration recovery.
6167 */
6168int nfs4_proc_get_locations(struct inode *inode,
6169 struct nfs4_fs_locations *locations,
6170 struct page *page, struct rpc_cred *cred)
6171{
6172 struct nfs_server *server = NFS_SERVER(inode);
6173 struct nfs_client *clp = server->nfs_client;
6174 const struct nfs4_mig_recovery_ops *ops =
6175 clp->cl_mvops->mig_recovery_ops;
6176 struct nfs4_exception exception = { };
6177 int status;
6178
6179 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6180 (unsigned long long)server->fsid.major,
6181 (unsigned long long)server->fsid.minor,
6182 clp->cl_hostname);
6183 nfs_display_fhandle(NFS_FH(inode), __func__);
6184
6185 do {
6186 status = ops->get_locations(inode, locations, page, cred);
6187 if (status != -NFS4ERR_DELAY)
6188 break;
6189 nfs4_handle_exception(server, status, &exception);
6190 } while (exception.retry);
6191 return status;
6192}
6193
44c99933
CL		 6194/*
6195 * This operation also signals the server that this client is
6196 * performing "lease moved" recovery. The server can stop
6197 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6198 * is appended to this compound to identify the client ID which is
6199 * performing recovery.
6200 */
6201static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6202{
6203 struct nfs_server *server = NFS_SERVER(inode);
6204 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6205 struct rpc_clnt *clnt = server->client;
6206 struct nfs4_fsid_present_arg args = {
6207 .fh = NFS_FH(inode),
6208 .clientid = clp->cl_clientid,
6209 .renew = 1, /* append RENEW */
6210 };
6211 struct nfs4_fsid_present_res res = {
6212 .renew = 1,
6213 };
6214 struct rpc_message msg = {
6215 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6216 .rpc_argp = &args,
6217 .rpc_resp = &res,
6218 .rpc_cred = cred,
6219 };
6220 unsigned long now = jiffies;
6221 int status;
6222
6223 res.fh = nfs_alloc_fhandle();
6224 if (res.fh == NULL)
6225 return -ENOMEM;
6226
6227 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6228 nfs4_set_sequence_privileged(&args.seq_args);
6229 status = nfs4_call_sync_sequence(clnt, server, &msg,
6230 &args.seq_args, &res.seq_res);
6231 nfs_free_fhandle(res.fh);
6232 if (status)
6233 return status;
6234
6235 do_renew_lease(clp, now);
6236 return 0;
6237}
6238
6239#ifdef CONFIG_NFS_V4_1
6240
6241/*
6242 * This operation also signals the server that this client is
6243 * performing "lease moved" recovery. The server can stop asserting
6244 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6245 * this operation is identified in the SEQUENCE operation in this
6246 * compound.
6247 */
6248static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6249{
6250 struct nfs_server *server = NFS_SERVER(inode);
6251 struct rpc_clnt *clnt = server->client;
6252 struct nfs4_fsid_present_arg args = {
6253 .fh = NFS_FH(inode),
6254 };
6255 struct nfs4_fsid_present_res res = {
6256 };
6257 struct rpc_message msg = {
6258 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6259 .rpc_argp = &args,
6260 .rpc_resp = &res,
6261 .rpc_cred = cred,
6262 };
6263 int status;
6264
6265 res.fh = nfs_alloc_fhandle();
6266 if (res.fh == NULL)
6267 return -ENOMEM;
6268
6269 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6270 nfs4_set_sequence_privileged(&args.seq_args);
6271 status = nfs4_call_sync_sequence(clnt, server, &msg,
6272 &args.seq_args, &res.seq_res);
6273 nfs_free_fhandle(res.fh);
6274 if (status == NFS4_OK &&
6275 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6276 status = -NFS4ERR_LEASE_MOVED;
6277 return status;
6278}
6279
6280#endif /* CONFIG_NFS_V4_1 */
6281
6282/**
6283 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6284 * @inode: inode on FSID to check
6285 * @cred: credential to use for this operation
6286 *
6287 * Server indicates whether the FSID is present, moved, or not
6288 * recognized. This operation is necessary to clear a LEASE_MOVED
6289 * condition for this client ID.
6290 *
6291 * Returns NFS4_OK if the FSID is present on this server,
6292 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6293 * NFS4ERR code if some error occurred on the server, or a
6294 * negative errno if a local failure occurred.
6295 */
6296int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6297{
6298 struct nfs_server *server = NFS_SERVER(inode);
6299 struct nfs_client *clp = server->nfs_client;
6300 const struct nfs4_mig_recovery_ops *ops =
6301 clp->cl_mvops->mig_recovery_ops;
6302 struct nfs4_exception exception = { };
6303 int status;
6304
6305 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6306 (unsigned long long)server->fsid.major,
6307 (unsigned long long)server->fsid.minor,
6308 clp->cl_hostname);
6309 nfs_display_fhandle(NFS_FH(inode), __func__);
6310
6311 do {
6312 status = ops->fsid_present(inode, cred);
6313 if (status != -NFS4ERR_DELAY)
6314 break;
6315 nfs4_handle_exception(server, status, &exception);
6316 } while (exception.retry);
6317 return status;
6318}
6319
5ec16a85 6320/**
a5250def
WAA		 6321 * If 'use_integrity' is true and the state managment nfs_client
6322 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6323 * and the machine credential as per RFC3530bis and RFC5661 Security
6324 * Considerations sections. Otherwise, just use the user cred with the
6325 * filesystem's rpc_client.
5ec16a85 6326 */
a5250def 6327static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6328{
6329 int status;
6330 struct nfs4_secinfo_arg args = {
6331 .dir_fh = NFS_FH(dir),
6332 .name = name,
6333 };
6334 struct nfs4_secinfo_res res = {
6335 .flavors = flavors,
6336 };
6337 struct rpc_message msg = {
6338 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6339 .rpc_argp = &args,
6340 .rpc_resp = &res,
6341 };
a5250def 6342 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6343 struct rpc_cred *cred = NULL;
a5250def
WAA		 6344
6345 if (use_integrity) {
6346 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6347 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6348 msg.rpc_cred = cred;
a5250def 6349 }
5a5ea0d4
BS		 6350
6351 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6352
6353 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6354 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6355
a5250def
WAA		 6356 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6357 &res.seq_res, 0);
5a5ea0d4 6358 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6359
7cb852df
WAA		 6360 if (cred)
6361 put_rpccred(cred);
a5250def 6362
5a5ea0d4
BS		 6363 return status;
6364}
6365
72de53ec
BS		 6366int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6367 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6368{
6369 struct nfs4_exception exception = { };
6370 int err;
6371 do {
a5250def
WAA		 6372 err = -NFS4ERR_WRONGSEC;
6373
6374 /* try to use integrity protection with machine cred */
6375 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6376 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6377
6378 /*
6379 * if unable to use integrity protection, or SECINFO with
6380 * integrity protection returns NFS4ERR_WRONGSEC (which is
6381 * disallowed by spec, but exists in deployed servers) use
6382 * the current filesystem's rpc_client and the user cred.
6383 */
6384 if (err == -NFS4ERR_WRONGSEC)
6385 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6386
078ea3df
TM		 6387 trace_nfs4_secinfo(dir, name, err);
6388 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6389 &exception);
6390 } while (exception.retry);
6391 return err;
6392}
6393
557134a3 6394#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6395/*
6396 * Check the exchange flags returned by the server for invalid flags, having
6397 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6398 * DS flags set.
6399 */
6400static int nfs4_check_cl_exchange_flags(u32 flags)
6401{
6402 if (flags & ~EXCHGID4_FLAG_MASK_R)
6403 goto out_inval;
6404 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6405 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6406 goto out_inval;
6407 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6408 goto out_inval;
6409 return NFS_OK;
6410out_inval:
6411 return -NFS4ERR_INVAL;
6412}
6413
78fe0f41 6414static bool
79d4e1f0
CL		 6415nfs41_same_server_scope(struct nfs41_server_scope *a,
6416 struct nfs41_server_scope *b)
78fe0f41
WAA		 6417{
6418 if (a->server_scope_sz == b->server_scope_sz &&
6419 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6420 return true;
6421
6422 return false;
6423}
6424
7c44f1ae
WAA		 6425/*
6426 * nfs4_proc_bind_conn_to_session()
6427 *
6428 * The 4.1 client currently uses the same TCP connection for the
6429 * fore and backchannel.
6430 */
2cf047c9 6431int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6432{
6433 int status;
6434 struct nfs41_bind_conn_to_session_res res;
6435 struct rpc_message msg = {
6436 .rpc_proc =
6437 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6438 .rpc_argp = clp,
6439 .rpc_resp = &res,
2cf047c9 6440 .rpc_cred = cred,
7c44f1ae
WAA		 6441 };
6442
6443 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 6444
6445 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6446 if (unlikely(res.session == NULL)) {
6447 status = -ENOMEM;
6448 goto out;
6449 }
6450
6451 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6452 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 6453 if (status == 0) {
6454 if (memcmp(res.session->sess_id.data,
6455 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6456 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6457 status = -EIO;
6458 goto out_session;
6459 }
6460 if (res.dir != NFS4_CDFS4_BOTH) {
6461 dprintk("NFS: %s: Unexpected direction from server\n",
6462 __func__);
6463 status = -EIO;
6464 goto out_session;
6465 }
6466 if (res.use_conn_in_rdma_mode) {
6467 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6468 __func__);
6469 status = -EIO;
6470 goto out_session;
6471 }
6472 }
6473out_session:
6474 kfree(res.session);
6475out:
6476 dprintk("<-- %s status= %d\n", __func__, status);
6477 return status;
6478}
6479
99fe60d0 6480/*
fa940720
WAA		 6481 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6482 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6483 */
6484static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6485 .how = SP4_MACH_CRED,
6486 .enforce.u.words = {
6487 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6488 1 << (OP_EXCHANGE_ID - 32) |
6489 1 << (OP_CREATE_SESSION - 32) |
6490 1 << (OP_DESTROY_SESSION - 32) |
6491 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6492 },
6493 .allow.u.words = {
6494 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6495 1 << (OP_LOCKU) |
6496 1 << (OP_COMMIT),
8b5bee2e 6497 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6498 1 << (OP_SECINFO_NO_NAME - 32) |
6499 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6500 1 << (OP_FREE_STATEID - 32) |
6501 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6502 }
6503};
6504
6505/*
6506 * Select the state protection mode for client `clp' given the server results
6507 * from exchange_id in `sp'.
99fe60d0 6508 *
2031cd1a
WAA		 6509 * Returns 0 on success, negative errno otherwise.
6510 */
6511static int nfs4_sp4_select_mode(struct nfs_client *clp,
6512 struct nfs41_state_protection *sp)
6513{
6514 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6515 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6516 1 << (OP_EXCHANGE_ID - 32) |
6517 1 << (OP_CREATE_SESSION - 32) |
6518 1 << (OP_DESTROY_SESSION - 32) |
6519 1 << (OP_DESTROY_CLIENTID - 32)
6520 };
6521 unsigned int i;
6522
6523 if (sp->how == SP4_MACH_CRED) {
6524 /* Print state protect result */
6525 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6526 for (i = 0; i <= LAST_NFS4_OP; i++) {
6527 if (test_bit(i, sp->enforce.u.longs))
6528 dfprintk(MOUNT, " enforce op %d\n", i);
6529 if (test_bit(i, sp->allow.u.longs))
6530 dfprintk(MOUNT, " allow op %d\n", i);
6531 }
6532
6533 /* make sure nothing is on enforce list that isn't supported */
6534 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6535 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6536 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6537 return -EINVAL;
6538 }
6539 }
6540
6541 /*
6542 * Minimal mode - state operations are allowed to use machine
6543 * credential. Note this already happens by default, so the
6544 * client doesn't have to do anything more than the negotiation.
6545 *
6546 * NOTE: we don't care if EXCHANGE_ID is in the list -
6547 * we're already using the machine cred for exchange_id
6548 * and will never use a different cred.
6549 */
6550 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6551 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6552 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6553 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6554 dfprintk(MOUNT, "sp4_mach_cred:\n");
6555 dfprintk(MOUNT, " minimal mode enabled\n");
6556 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6557 } else {
6558 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6559 return -EINVAL;
6560 }
fa940720
WAA		 6561
6562 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6563 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6564 dfprintk(MOUNT, " cleanup mode enabled\n");
6565 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6566 }
8b5bee2e
WAA		 6567
6568 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6569 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6570 dfprintk(MOUNT, " secinfo mode enabled\n");
6571 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6572 }
3787d506
WAA		 6573
6574 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6575 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6576 dfprintk(MOUNT, " stateid mode enabled\n");
6577 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6578 }
8c21c62c
WAA		 6579
6580 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6581 dfprintk(MOUNT, " write mode enabled\n");
6582 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6583 }
6584
6585 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6586 dfprintk(MOUNT, " commit mode enabled\n");
6587 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6588 }
2031cd1a
WAA		 6589 }
6590
6591 return 0;
6592}
6593
6594/*
6595 * _nfs4_proc_exchange_id()
6bbb4ae8 6596 *
2031cd1a 6597 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6598 */
2031cd1a
WAA		 6599static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6600 u32 sp4_how)
99fe60d0
BH		 6601{
6602 nfs4_verifier verifier;
6603 struct nfs41_exchange_id_args args = {
cd93710e 6604 .verifier = &verifier,
99fe60d0 6605 .client = clp,
cd3fadec 6606#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6607 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6608 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6609 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6610#else
6611 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6612 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6613#endif
99fe60d0
BH		 6614 };
6615 struct nfs41_exchange_id_res res = {
32b01310 6616 0
99fe60d0
BH		 6617 };
6618 int status;
6619 struct rpc_message msg = {
6620 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6621 .rpc_argp = &args,
6622 .rpc_resp = &res,
6623 .rpc_cred = cred,
6624 };
99fe60d0 6625
f092075d 6626 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 6627 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6628 sizeof(args.id));
6bbb4ae8
CL		 6629 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6630 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6631 args.id_len, args.id);
99fe60d0 6632
acdeb69d 6633 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6634 GFP_NOFS);
acdeb69d 6635 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6636 status = -ENOMEM;
6637 goto out;
6638 }
78fe0f41 6639
79d4e1f0 6640 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6641 GFP_NOFS);
177313f1 6642 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6643 status = -ENOMEM;
acdeb69d 6644 goto out_server_owner;
abe9a6d5 6645 }
78fe0f41 6646
bbafffd2 6647 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6648 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6649 status = -ENOMEM;
6650 goto out_server_scope;
6651 }
6652
2031cd1a
WAA		 6653 switch (sp4_how) {
6654 case SP4_NONE:
6655 args.state_protect.how = SP4_NONE;
6656 break;
6657
6658 case SP4_MACH_CRED:
6659 args.state_protect = nfs4_sp4_mach_cred_request;
6660 break;
6661
6662 default:
6663 /* unsupported! */
6664 WARN_ON_ONCE(1);
6665 status = -EINVAL;
6666 goto out_server_scope;
6667 }
6668
1bd714f2 6669 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6670 trace_nfs4_exchange_id(clp, status);
177313f1 6671 if (status == 0)
32b01310 6672 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6673
2031cd1a
WAA		 6674 if (status == 0)
6675 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6676
acdeb69d 6677 if (status == 0) {
32b01310
TM		 6678 clp->cl_clientid = res.clientid;
6679 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6680 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6681 clp->cl_seqid = res.seqid;
6682
acdeb69d
CL		 6683 kfree(clp->cl_serverowner);
6684 clp->cl_serverowner = res.server_owner;
6685 res.server_owner = NULL;
78fe0f41 6686
7d2ed9ac 6687 /* use the most recent implementation id */
59155546
CL		 6688 kfree(clp->cl_implid);
6689 clp->cl_implid = res.impl_id;
7d2ed9ac 6690
177313f1 6691 if (clp->cl_serverscope != NULL &&
79d4e1f0 6692 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6693 res.server_scope)) {
6694 dprintk("%s: server_scope mismatch detected\n",
6695 __func__);
6696 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6697 kfree(clp->cl_serverscope);
6698 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6699 }
6700
177313f1 6701 if (clp->cl_serverscope == NULL) {
79d4e1f0 6702 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6703 goto out;
6704 }
32b01310
TM		 6705 } else
6706 kfree(res.impl_id);
7d2ed9ac 6707
acdeb69d
CL		 6708out_server_owner:
6709 kfree(res.server_owner);
7d2ed9ac 6710out_server_scope:
abe9a6d5
WAA		 6711 kfree(res.server_scope);
6712out:
177313f1 6713 if (clp->cl_implid != NULL)
6bbb4ae8 6714 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6715 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6716 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6717 clp->cl_implid->date.seconds,
6718 clp->cl_implid->date.nseconds);
6bbb4ae8 6719 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6720 return status;
6721}
6722
2031cd1a
WAA		 6723/*
6724 * nfs4_proc_exchange_id()
6725 *
6726 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6727 *
6728 * Since the clientid has expired, all compounds using sessions
6729 * associated with the stale clientid will be returning
6730 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6731 * be in some phase of session reset.
6732 *
6733 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6734 */
6735int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6736{
6737 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6738 int status;
6739
6740 /* try SP4_MACH_CRED if krb5i/p */
6741 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6742 authflavor == RPC_AUTH_GSS_KRB5P) {
6743 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6744 if (!status)
6745 return 0;
6746 }
6747
6748 /* try SP4_NONE */
6749 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6750}
6751
66245539
TM		 6752static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6753 struct rpc_cred *cred)
6754{
6755 struct rpc_message msg = {
6756 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6757 .rpc_argp = clp,
6758 .rpc_cred = cred,
6759 };
6760 int status;
6761
6762 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6763 trace_nfs4_destroy_clientid(clp, status);
66245539 6764 if (status)
02c67525 6765 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6766 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6767 return status;
6768}
6769
6770static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6771 struct rpc_cred *cred)
6772{
6773 unsigned int loop;
6774 int ret;
6775
6776 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6777 ret = _nfs4_proc_destroy_clientid(clp, cred);
6778 switch (ret) {
6779 case -NFS4ERR_DELAY:
6780 case -NFS4ERR_CLIENTID_BUSY:
6781 ssleep(1);
6782 break;
6783 default:
6784 return ret;
6785 }
6786 }
6787 return 0;
6788}
6789
6790int nfs4_destroy_clientid(struct nfs_client *clp)
6791{
6792 struct rpc_cred *cred;
6793 int ret = 0;
6794
6795 if (clp->cl_mvops->minor_version < 1)
6796 goto out;
6797 if (clp->cl_exchange_flags == 0)
6798 goto out;
05f4c350
CL		 6799 if (clp->cl_preserve_clid)
6800 goto out;
73d8bde5 6801 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6802 ret = nfs4_proc_destroy_clientid(clp, cred);
6803 if (cred)
6804 put_rpccred(cred);
6805 switch (ret) {
6806 case 0:
6807 case -NFS4ERR_STALE_CLIENTID:
6808 clp->cl_exchange_flags = 0;
6809 }
6810out:
6811 return ret;
6812}
6813
2050f0cc
AA		 6814struct nfs4_get_lease_time_data {
6815 struct nfs4_get_lease_time_args *args;
6816 struct nfs4_get_lease_time_res *res;
6817 struct nfs_client *clp;
6818};
6819
6820static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6821 void *calldata)
6822{
2050f0cc
AA		 6823 struct nfs4_get_lease_time_data *data =
6824 (struct nfs4_get_lease_time_data *)calldata;
6825
6826 dprintk("--> %s\n", __func__);
6827 /* just setup sequence, do not trigger session recovery
6828 since we're invoked within one */
d9afbd1b
TM		 6829 nfs41_setup_sequence(data->clp->cl_session,
6830 &data->args->la_seq_args,
6831 &data->res->lr_seq_res,
6832 task);
2050f0cc
AA		 6833 dprintk("<-- %s\n", __func__);
6834}
6835
6836/*
6837 * Called from nfs4_state_manager thread for session setup, so don't recover
6838 * from sequence operation or clientid errors.
6839 */
6840static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6841{
6842 struct nfs4_get_lease_time_data *data =
6843 (struct nfs4_get_lease_time_data *)calldata;
6844
6845 dprintk("--> %s\n", __func__);
14516c3a
TM		 6846 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6847 return;
2050f0cc
AA		 6848 switch (task->tk_status) {
6849 case -NFS4ERR_DELAY:
6850 case -NFS4ERR_GRACE:
6851 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6852 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6853 task->tk_status = 0;
a8a4ae3a
AA		 6854 /* fall through */
6855 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 6856 rpc_restart_call_prepare(task);
2050f0cc
AA		 6857 return;
6858 }
2050f0cc
AA		 6859 dprintk("<-- %s\n", __func__);
6860}
6861
17280175 6862static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 6863 .rpc_call_prepare = nfs4_get_lease_time_prepare,
6864 .rpc_call_done = nfs4_get_lease_time_done,
6865};
6866
6867int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
6868{
6869 struct rpc_task *task;
6870 struct nfs4_get_lease_time_args args;
6871 struct nfs4_get_lease_time_res res = {
6872 .lr_fsinfo = fsinfo,
6873 };
6874 struct nfs4_get_lease_time_data data = {
6875 .args = &args,
6876 .res = &res,
6877 .clp = clp,
6878 };
6879 struct rpc_message msg = {
6880 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
6881 .rpc_argp = &args,
6882 .rpc_resp = &res,
6883 };
6884 struct rpc_task_setup task_setup = {
6885 .rpc_client = clp->cl_rpcclient,
6886 .rpc_message = &msg,
6887 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 6888 .callback_data = &data,
6889 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 6890 };
6891 int status;
6892
a9c92d6b 6893 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 6894 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 6895 dprintk("--> %s\n", __func__);
6896 task = rpc_run_task(&task_setup);
6897
6898 if (IS_ERR(task))
6899 status = PTR_ERR(task);
6900 else {
6901 status = task->tk_status;
6902 rpc_put_task(task);
6903 }
6904 dprintk("<-- %s return %d\n", __func__, status);
6905
6906 return status;
6907}
6908
fc931582
AA		 6909/*
6910 * Initialize the values to be used by the client in CREATE_SESSION
6911 * If nfs4_init_session set the fore channel request and response sizes,
6912 * use them.
6913 *
6914 * Set the back channel max_resp_sz_cached to zero to force the client to
6915 * always set csa_cachethis to FALSE because the current implementation
6916 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
6917 */
6918static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
6919{
18aad3d5
AA		 6920 unsigned int max_rqst_sz, max_resp_sz;
6921
6922 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
6923 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 6924
fc931582 6925 /* Fore channel attributes */
18aad3d5
AA		 6926 args->fc_attrs.max_rqst_sz = max_rqst_sz;
6927 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 6928 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 6929 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 6930
6931 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 6932 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 6933 __func__,
6934 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 6935 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 6936
6937 /* Back channel attributes */
fc931582
AA		 6938 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
6939 args->bc_attrs.max_resp_sz = PAGE_SIZE;
6940 args->bc_attrs.max_resp_sz_cached = 0;
6941 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
6942 args->bc_attrs.max_reqs = 1;
6943
6944 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
6945 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
6946 __func__,
6947 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
6948 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
6949 args->bc_attrs.max_reqs);
6950}
6951
43c2e885 6952static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 6953{
43c2e885
BF		 6954 struct nfs4_channel_attrs *sent = &args->fc_attrs;
6955 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
6956
43c2e885
BF		 6957 if (rcvd->max_resp_sz > sent->max_resp_sz)
6958 return -EINVAL;
6959 /*
6960 * Our requested max_ops is the minimum we need; we're not
6961 * prepared to break up compounds into smaller pieces than that.
6962 * So, no point even trying to continue if the server won't
6963 * cooperate:
6964 */
6965 if (rcvd->max_ops < sent->max_ops)
6966 return -EINVAL;
6967 if (rcvd->max_reqs == 0)
6968 return -EINVAL;
b4b9a0c1
VG		 6969 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
6970 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 6971 return 0;
8d35301d
AA		 6972}
6973
43c2e885
BF		 6974static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
6975{
6976 struct nfs4_channel_attrs *sent = &args->bc_attrs;
6977 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 6978
43c2e885
BF		 6979 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
6980 return -EINVAL;
6981 if (rcvd->max_resp_sz < sent->max_resp_sz)
6982 return -EINVAL;
6983 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
6984 return -EINVAL;
6985 /* These would render the backchannel useless: */
b4b9a0c1 6986 if (rcvd->max_ops != sent->max_ops)
43c2e885 6987 return -EINVAL;
b4b9a0c1 6988 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 6989 return -EINVAL;
6990 return 0;
6991}
8d35301d 6992
8d35301d
AA		 6993static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
6994 struct nfs4_session *session)
6995{
43c2e885 6996 int ret;
8d35301d 6997
43c2e885
BF		 6998 ret = nfs4_verify_fore_channel_attrs(args, session);
6999 if (ret)
7000 return ret;
7001 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 7002}
7003
848f5bda
TM		 7004static int _nfs4_proc_create_session(struct nfs_client *clp,
7005 struct rpc_cred *cred)
fc931582
AA		 7006{
7007 struct nfs4_session *session = clp->cl_session;
7008 struct nfs41_create_session_args args = {
7009 .client = clp,
7010 .cb_program = NFS4_CALLBACK,
7011 };
7012 struct nfs41_create_session_res res = {
7013 .client = clp,
7014 };
7015 struct rpc_message msg = {
7016 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7017 .rpc_argp = &args,
7018 .rpc_resp = &res,
848f5bda 7019 .rpc_cred = cred,
fc931582
AA		 7020 };
7021 int status;
7022
7023 nfs4_init_channel_attrs(&args);
0f91421e 7024 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7025
1bd714f2 7026 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7027 trace_nfs4_create_session(clp, status);
fc931582 7028
43095d39 7029 if (!status) {
8d35301d
AA		 7030 /* Verify the session's negotiated channel_attrs values */
7031 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 7032 /* Increment the clientid slot sequence id */
7033 clp->cl_seqid++;
7034 }
7035
7036 return status;
7037}
7038
7039/*
7040 * Issues a CREATE_SESSION operation to the server.
7041 * It is the responsibility of the caller to verify the session is
7042 * expired before calling this routine.
7043 */
848f5bda 7044int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7045{
7046 int status;
7047 unsigned *ptr;
fc931582
AA		 7048 struct nfs4_session *session = clp->cl_session;
7049
7050 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7051
848f5bda 7052 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7053 if (status)
7054 goto out;
7055
aacd5537
AA		 7056 /* Init or reset the session slot tables */
7057 status = nfs4_setup_session_slot_tables(session);
7058 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7059 if (status)
7060 goto out;
7061
7062 ptr = (unsigned *)&session->sess_id.data[0];
7063 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7064 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7065out:
7066 dprintk("<-- %s\n", __func__);
7067 return status;
7068}
7069
0f3e66c6
AA		 7070/*
7071 * Issue the over-the-wire RPC DESTROY_SESSION.
7072 * The caller must serialize access to this routine.
7073 */
848f5bda
TM		 7074int nfs4_proc_destroy_session(struct nfs4_session *session,
7075 struct rpc_cred *cred)
0f3e66c6 7076{
848f5bda
TM		 7077 struct rpc_message msg = {
7078 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7079 .rpc_argp = session,
7080 .rpc_cred = cred,
7081 };
0f3e66c6 7082 int status = 0;
0f3e66c6
AA		 7083
7084 dprintk("--> nfs4_proc_destroy_session\n");
7085
7086 /* session is still being setup */
7087 if (session->clp->cl_cons_state != NFS_CS_READY)
7088 return status;
7089
1bd714f2 7090 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7091 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7092
7093 if (status)
08106ac7 7094 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7095 "Session has been destroyed regardless...\n", status);
7096
7097 dprintk("<-- nfs4_proc_destroy_session\n");
7098 return status;
7099}
7100
fc01cea9
AA		 7101/*
7102 * Renew the cl_session lease.
7103 */
d5f8d3fe
TM		 7104struct nfs4_sequence_data {
7105 struct nfs_client *clp;
7106 struct nfs4_sequence_args args;
7107 struct nfs4_sequence_res res;
7108};
7109
dc96aef9
AB		 7110static void nfs41_sequence_release(void *data)
7111{
d5f8d3fe
TM		 7112 struct nfs4_sequence_data *calldata = data;
7113 struct nfs_client *clp = calldata->clp;
dc96aef9 7114
7135840f
AB		 7115 if (atomic_read(&clp->cl_count) > 1)
7116 nfs4_schedule_state_renewal(clp);
7117 nfs_put_client(clp);
d5f8d3fe 7118 kfree(calldata);
dc96aef9
AB		 7119}
7120
aa5190d0
TM		 7121static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7122{
7123 switch(task->tk_status) {
7124 case -NFS4ERR_DELAY:
aa5190d0
TM		 7125 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7126 return -EAGAIN;
7127 default:
0400a6b0 7128 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7129 }
7130 return 0;
7131}
7132
dc96aef9 7133static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7134{
d5f8d3fe
TM		 7135 struct nfs4_sequence_data *calldata = data;
7136 struct nfs_client *clp = calldata->clp;
fc01cea9 7137
14516c3a
TM		 7138 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7139 return;
fc01cea9 7140
c6d01c6f 7141 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7142 if (task->tk_status < 0) {
7143 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7144 if (atomic_read(&clp->cl_count) == 1)
7145 goto out;
fc01cea9 7146
aa5190d0
TM		 7147 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7148 rpc_restart_call_prepare(task);
fc01cea9
AA		 7149 return;
7150 }
7151 }
fc01cea9 7152 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7153out:
fc01cea9
AA		 7154 dprintk("<-- %s\n", __func__);
7155}
7156
7157static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7158{
d5f8d3fe
TM		 7159 struct nfs4_sequence_data *calldata = data;
7160 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7161 struct nfs4_sequence_args *args;
7162 struct nfs4_sequence_res *res;
7163
fc01cea9
AA		 7164 args = task->tk_msg.rpc_argp;
7165 res = task->tk_msg.rpc_resp;
7166
d9afbd1b 7167 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7168}
7169
7170static const struct rpc_call_ops nfs41_sequence_ops = {
7171 .rpc_call_done = nfs41_sequence_call_done,
7172 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7173 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7174};
7175
8fe72bac
TM		 7176static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7177 struct rpc_cred *cred,
7178 bool is_privileged)
fc01cea9 7179{
d5f8d3fe 7180 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7181 struct rpc_message msg = {
7182 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7183 .rpc_cred = cred,
7184 };
71ac6da9
TM		 7185 struct rpc_task_setup task_setup_data = {
7186 .rpc_client = clp->cl_rpcclient,
7187 .rpc_message = &msg,
8fe72bac 7188 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7189 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7190 };
fc01cea9 7191
7135840f 7192 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7193 return ERR_PTR(-EIO);
dfb4f309 7194 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7195 if (calldata == NULL) {
7135840f 7196 nfs_put_client(clp);
71ac6da9 7197 return ERR_PTR(-ENOMEM);
fc01cea9 7198 }
a9c92d6b 7199 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7200 if (is_privileged)
7201 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7202 msg.rpc_argp = &calldata->args;
7203 msg.rpc_resp = &calldata->res;
7204 calldata->clp = clp;
71ac6da9 7205 task_setup_data.callback_data = calldata;
fc01cea9 7206
71ac6da9
TM		 7207 return rpc_run_task(&task_setup_data);
7208}
7209
2f60ea6b 7210static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7211{
7212 struct rpc_task *task;
7213 int ret = 0;
7214
2f60ea6b
TM		 7215 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
7216 return 0;
8fe72bac 7217 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7218 if (IS_ERR(task))
7219 ret = PTR_ERR(task);
7220 else
bf294b41 7221 rpc_put_task_async(task);
71ac6da9
TM		 7222 dprintk("<-- %s status=%d\n", __func__, ret);
7223 return ret;
7224}
7225
7226static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7227{
7228 struct rpc_task *task;
7229 int ret;
7230
8fe72bac 7231 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7232 if (IS_ERR(task)) {
7233 ret = PTR_ERR(task);
7234 goto out;
7235 }
7236 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 7237 if (!ret) {
7238 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7239
7240 if (task->tk_status == 0)
7241 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 7242 ret = task->tk_status;
b4410c2f 7243 }
71ac6da9
TM		 7244 rpc_put_task(task);
7245out:
7246 dprintk("<-- %s status=%d\n", __func__, ret);
7247 return ret;
fc01cea9
AA		 7248}
7249
fce5c838
RL		 7250struct nfs4_reclaim_complete_data {
7251 struct nfs_client *clp;
7252 struct nfs41_reclaim_complete_args arg;
7253 struct nfs41_reclaim_complete_res res;
7254};
7255
7256static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7257{
7258 struct nfs4_reclaim_complete_data *calldata = data;
7259
d9afbd1b
TM		 7260 nfs41_setup_sequence(calldata->clp->cl_session,
7261 &calldata->arg.seq_args,
7262 &calldata->res.seq_res,
7263 task);
fce5c838
RL		 7264}
7265
aa5190d0
TM		 7266static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7267{
7268 switch(task->tk_status) {
7269 case 0:
7270 case -NFS4ERR_COMPLETE_ALREADY:
7271 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7272 break;
7273 case -NFS4ERR_DELAY:
aa5190d0 7274 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7275 /* fall through */
7276 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7277 return -EAGAIN;
7278 default:
0400a6b0 7279 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7280 }
7281 return 0;
7282}
7283
fce5c838
RL		 7284static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7285{
7286 struct nfs4_reclaim_complete_data *calldata = data;
7287 struct nfs_client *clp = calldata->clp;
7288 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7289
7290 dprintk("--> %s\n", __func__);
14516c3a
TM		 7291 if (!nfs41_sequence_done(task, res))
7292 return;
fce5c838 7293
c6d01c6f 7294 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7295 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7296 rpc_restart_call_prepare(task);
7297 return;
7298 }
fce5c838
RL		 7299 dprintk("<-- %s\n", __func__);
7300}
7301
7302static void nfs4_free_reclaim_complete_data(void *data)
7303{
7304 struct nfs4_reclaim_complete_data *calldata = data;
7305
7306 kfree(calldata);
7307}
7308
7309static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7310 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7311 .rpc_call_done = nfs4_reclaim_complete_done,
7312 .rpc_release = nfs4_free_reclaim_complete_data,
7313};
7314
7315/*
7316 * Issue a global reclaim complete.
7317 */
965e9c23
TM		 7318static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7319 struct rpc_cred *cred)
fce5c838
RL		 7320{
7321 struct nfs4_reclaim_complete_data *calldata;
7322 struct rpc_task *task;
7323 struct rpc_message msg = {
7324 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7325 .rpc_cred = cred,
fce5c838
RL		 7326 };
7327 struct rpc_task_setup task_setup_data = {
7328 .rpc_client = clp->cl_rpcclient,
7329 .rpc_message = &msg,
7330 .callback_ops = &nfs4_reclaim_complete_call_ops,
7331 .flags = RPC_TASK_ASYNC,
7332 };
7333 int status = -ENOMEM;
7334
7335 dprintk("--> %s\n", __func__);
8535b2be 7336 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7337 if (calldata == NULL)
7338 goto out;
7339 calldata->clp = clp;
7340 calldata->arg.one_fs = 0;
fce5c838 7341
a9c92d6b 7342 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7343 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7344 msg.rpc_argp = &calldata->arg;
7345 msg.rpc_resp = &calldata->res;
7346 task_setup_data.callback_data = calldata;
7347 task = rpc_run_task(&task_setup_data);
acf82b85 7348 if (IS_ERR(task)) {
fce5c838 7349 status = PTR_ERR(task);
acf82b85
DC		 7350 goto out;
7351 }
c34c32ea
AA		 7352 status = nfs4_wait_for_completion_rpc_task(task);
7353 if (status == 0)
7354 status = task->tk_status;
fce5c838 7355 rpc_put_task(task);
acf82b85 7356 return 0;
fce5c838
RL		 7357out:
7358 dprintk("<-- %s status=%d\n", __func__, status);
7359 return status;
7360}
b1f69b75
AA		 7361
7362static void
7363nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7364{
7365 struct nfs4_layoutget *lgp = calldata;
c31663d4 7366 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7367 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7368
7369 dprintk("--> %s\n", __func__);
c31663d4
FI		 7370 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7371 * right now covering the LAYOUTGET we are about to send.
7372 * However, that is not so catastrophic, and there seems
7373 * to be no way to prevent it completely.
7374 */
6ba7db34 7375 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7376 &lgp->res.seq_res, task))
b1f69b75 7377 return;
cf7d63f1
FI		 7378 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7379 NFS_I(lgp->args.inode)->layout,
7380 lgp->args.ctx->state)) {
7381 rpc_exit(task, NFS4_OK);
cf7d63f1 7382 }
b1f69b75
AA		 7383}
7384
7385static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7386{
7387 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7388 struct inode *inode = lgp->args.inode;
7389 struct nfs_server *server = NFS_SERVER(inode);
7390 struct pnfs_layout_hdr *lo;
7391 struct nfs4_state *state = NULL;
30005121 7392 unsigned long timeo, giveup;
b1f69b75
AA		 7393
7394 dprintk("--> %s\n", __func__);
7395
6ba7db34 7396 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7397 goto out;
b1f69b75
AA		 7398
7399 switch (task->tk_status) {
7400 case 0:
ee314c2a 7401 goto out;
b1f69b75
AA		 7402 case -NFS4ERR_LAYOUTTRYLATER:
7403 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7404 timeo = rpc_get_timeout(task->tk_client);
7405 giveup = lgp->args.timestamp + timeo;
7406 if (time_after(giveup, jiffies))
7407 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 7408 break;
7409 case -NFS4ERR_EXPIRED:
7410 case -NFS4ERR_BAD_STATEID:
7411 spin_lock(&inode->i_lock);
7412 lo = NFS_I(inode)->layout;
7413 if (!lo || list_empty(&lo->plh_segs)) {
7414 spin_unlock(&inode->i_lock);
7415 /* If the open stateid was bad, then recover it. */
7416 state = lgp->args.ctx->state;
7417 } else {
7418 LIST_HEAD(head);
7419
7420 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7421 spin_unlock(&inode->i_lock);
7422 /* Mark the bad layout state as invalid, then
7423 * retry using the open stateid. */
7424 pnfs_free_lseg_list(&head);
b1f69b75
AA		 7425 }
7426 }
ee314c2a
TM		 7427 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
7428 rpc_restart_call_prepare(task);
7429out:
b1f69b75
AA		 7430 dprintk("<-- %s\n", __func__);
7431}
7432
8554116e
IK		 7433static size_t max_response_pages(struct nfs_server *server)
7434{
7435 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7436 return nfs_page_array_len(0, max_resp_sz);
7437}
7438
7439static void nfs4_free_pages(struct page **pages, size_t size)
7440{
7441 int i;
7442
7443 if (!pages)
7444 return;
7445
7446 for (i = 0; i < size; i++) {
7447 if (!pages[i])
7448 break;
7449 __free_page(pages[i]);
7450 }
7451 kfree(pages);
7452}
7453
7454static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7455{
7456 struct page **pages;
7457 int i;
7458
7459 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7460 if (!pages) {
7461 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7462 return NULL;
7463 }
7464
7465 for (i = 0; i < size; i++) {
7466 pages[i] = alloc_page(gfp_flags);
7467 if (!pages[i]) {
7468 dprintk("%s: failed to allocate page\n", __func__);
7469 nfs4_free_pages(pages, size);
7470 return NULL;
7471 }
7472 }
7473
7474 return pages;
7475}
7476
b1f69b75
AA		 7477static void nfs4_layoutget_release(void *calldata)
7478{
7479 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7480 struct inode *inode = lgp->args.inode;
7481 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7482 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7483
7484 dprintk("--> %s\n", __func__);
8554116e 7485 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7486 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7487 put_nfs_open_context(lgp->args.ctx);
7488 kfree(calldata);
7489 dprintk("<-- %s\n", __func__);
7490}
7491
7492static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7493 .rpc_call_prepare = nfs4_layoutget_prepare,
7494 .rpc_call_done = nfs4_layoutget_done,
7495 .rpc_release = nfs4_layoutget_release,
7496};
7497
a0b0a6e3
TM		 7498struct pnfs_layout_segment *
7499nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7500{
a47970ff
WAA		 7501 struct inode *inode = lgp->args.inode;
7502 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7503 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7504 struct rpc_task *task;
7505 struct rpc_message msg = {
7506 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7507 .rpc_argp = &lgp->args,
7508 .rpc_resp = &lgp->res,
6ab59344 7509 .rpc_cred = lgp->cred,
b1f69b75
AA		 7510 };
7511 struct rpc_task_setup task_setup_data = {
7512 .rpc_client = server->client,
7513 .rpc_message = &msg,
7514 .callback_ops = &nfs4_layoutget_call_ops,
7515 .callback_data = lgp,
7516 .flags = RPC_TASK_ASYNC,
7517 };
a0b0a6e3 7518 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7519 int status = 0;
7520
7521 dprintk("--> %s\n", __func__);
7522
8554116e
IK		 7523 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7524 if (!lgp->args.layout.pages) {
7525 nfs4_layoutget_release(lgp);
a0b0a6e3 7526 return ERR_PTR(-ENOMEM);
8554116e
IK		 7527 }
7528 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7529 lgp->args.timestamp = jiffies;
8554116e 7530
35124a09 7531 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7532 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7533 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 7534
7535 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7536 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7537
b1f69b75
AA		 7538 task = rpc_run_task(&task_setup_data);
7539 if (IS_ERR(task))
a0b0a6e3 7540 return ERR_CAST(task);
b1f69b75 7541 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7542 if (status == 0)
7543 status = task->tk_status;
1037e6ea
TM		 7544 trace_nfs4_layoutget(lgp->args.ctx,
7545 &lgp->args.range,
7546 &lgp->res.range,
7547 status);
085b7a45
WAA		 7548 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7549 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7550 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7551 rpc_put_task(task);
7552 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7553 if (status)
7554 return ERR_PTR(status);
7555 return lseg;
b1f69b75
AA		 7556}
7557
cbe82603
BH		 7558static void
7559nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7560{
7561 struct nfs4_layoutreturn *lrp = calldata;
7562
7563 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7564 nfs41_setup_sequence(lrp->clp->cl_session,
7565 &lrp->args.seq_args,
7566 &lrp->res.seq_res,
7567 task);
cbe82603
BH		 7568}
7569
7570static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7571{
7572 struct nfs4_layoutreturn *lrp = calldata;
7573 struct nfs_server *server;
7574
7575 dprintk("--> %s\n", __func__);
7576
6ba7db34 7577 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7578 return;
7579
7580 server = NFS_SERVER(lrp->args.inode);
7581 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 7582 rpc_restart_call_prepare(task);
cbe82603
BH		 7583 return;
7584 }
cbe82603
BH		 7585 dprintk("<-- %s\n", __func__);
7586}
7587
7588static void nfs4_layoutreturn_release(void *calldata)
7589{
7590 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7591 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7592
7593 dprintk("--> %s\n", __func__);
849b286f
TM		 7594 spin_lock(&lo->plh_inode->i_lock);
7595 if (lrp->res.lrs_present)
7596 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7597 lo->plh_block_lgets--;
7598 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7599 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 7600 kfree(calldata);
7601 dprintk("<-- %s\n", __func__);
7602}
7603
7604static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7605 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7606 .rpc_call_done = nfs4_layoutreturn_done,
7607 .rpc_release = nfs4_layoutreturn_release,
7608};
7609
7610int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7611{
7612 struct rpc_task *task;
7613 struct rpc_message msg = {
7614 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7615 .rpc_argp = &lrp->args,
7616 .rpc_resp = &lrp->res,
9556000d 7617 .rpc_cred = lrp->cred,
cbe82603
BH		 7618 };
7619 struct rpc_task_setup task_setup_data = {
1771c577 7620 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 7621 .rpc_message = &msg,
7622 .callback_ops = &nfs4_layoutreturn_call_ops,
7623 .callback_data = lrp,
7624 };
7625 int status;
7626
7627 dprintk("--> %s\n", __func__);
a9c92d6b 7628 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 7629 task = rpc_run_task(&task_setup_data);
7630 if (IS_ERR(task))
7631 return PTR_ERR(task);
7632 status = task->tk_status;
1037e6ea 7633 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 7634 dprintk("<-- %s status=%d\n", __func__, status);
7635 rpc_put_task(task);
7636 return status;
7637}
7638
7f11d8d3
AA		 7639/*
7640 * Retrieve the list of Data Server devices from the MDS.
7641 */
7642static int _nfs4_getdevicelist(struct nfs_server *server,
7643 const struct nfs_fh *fh,
7644 struct pnfs_devicelist *devlist)
7645{
7646 struct nfs4_getdevicelist_args args = {
7647 .fh = fh,
7648 .layoutclass = server->pnfs_curr_ld->id,
7649 };
7650 struct nfs4_getdevicelist_res res = {
7651 .devlist = devlist,
7652 };
7653 struct rpc_message msg = {
7654 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
7655 .rpc_argp = &args,
7656 .rpc_resp = &res,
7657 };
7658 int status;
7659
7660 dprintk("--> %s\n", __func__);
7661 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
7662 &res.seq_res, 0);
7663 dprintk("<-- %s status=%d\n", __func__, status);
7664 return status;
7665}
7666
7667int nfs4_proc_getdevicelist(struct nfs_server *server,
7668 const struct nfs_fh *fh,
7669 struct pnfs_devicelist *devlist)
7670{
7671 struct nfs4_exception exception = { };
7672 int err;
7673
7674 do {
7675 err = nfs4_handle_exception(server,
7676 _nfs4_getdevicelist(server, fh, devlist),
7677 &exception);
7678 } while (exception.retry);
7679
7680 dprintk("%s: err=%d, num_devs=%u\n", __func__,
7681 err, devlist->num_devs);
7682
7683 return err;
7684}
7685EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
7686
b1f69b75 7687static int
cd5875fe
TM		 7688_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7689 struct pnfs_device *pdev,
7690 struct rpc_cred *cred)
b1f69b75
AA		 7691{
7692 struct nfs4_getdeviceinfo_args args = {
7693 .pdev = pdev,
7694 };
7695 struct nfs4_getdeviceinfo_res res = {
7696 .pdev = pdev,
7697 };
7698 struct rpc_message msg = {
7699 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7700 .rpc_argp = &args,
7701 .rpc_resp = &res,
cd5875fe 7702 .rpc_cred = cred,
b1f69b75
AA		 7703 };
7704 int status;
7705
7706 dprintk("--> %s\n", __func__);
7c513058 7707 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7708 dprintk("<-- %s status=%d\n", __func__, status);
7709
7710 return status;
7711}
7712
cd5875fe
TM		 7713int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7714 struct pnfs_device *pdev,
7715 struct rpc_cred *cred)
b1f69b75
AA		 7716{
7717 struct nfs4_exception exception = { };
7718 int err;
7719
7720 do {
7721 err = nfs4_handle_exception(server,
cd5875fe 7722 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7723 &exception);
7724 } while (exception.retry);
7725 return err;
7726}
7727EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7728
863a3c6c
AA		 7729static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7730{
7731 struct nfs4_layoutcommit_data *data = calldata;
7732 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7733 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7734
d9afbd1b
TM		 7735 nfs41_setup_sequence(session,
7736 &data->args.seq_args,
7737 &data->res.seq_res,
7738 task);
863a3c6c
AA		 7739}
7740
7741static void
7742nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7743{
7744 struct nfs4_layoutcommit_data *data = calldata;
7745 struct nfs_server *server = NFS_SERVER(data->args.inode);
7746
6ba7db34 7747 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7748 return;
7749
7750 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7751 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7752 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7753 case -NFS4ERR_BADLAYOUT: /* no layout */
7754 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7755 task->tk_status = 0;
e59d27e0
TM		 7756 break;
7757 case 0:
863a3c6c
AA		 7758 nfs_post_op_update_inode_force_wcc(data->args.inode,
7759 data->res.fattr);
e59d27e0
TM		 7760 break;
7761 default:
7762 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7763 rpc_restart_call_prepare(task);
7764 return;
7765 }
7766 }
863a3c6c
AA		 7767}
7768
7769static void nfs4_layoutcommit_release(void *calldata)
7770{
7771 struct nfs4_layoutcommit_data *data = calldata;
7772
db29c089 7773 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 7774 put_rpccred(data->cred);
7775 kfree(data);
7776}
7777
7778static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7779 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7780 .rpc_call_done = nfs4_layoutcommit_done,
7781 .rpc_release = nfs4_layoutcommit_release,
7782};
7783
7784int
ef311537 7785nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7786{
7787 struct rpc_message msg = {
7788 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7789 .rpc_argp = &data->args,
7790 .rpc_resp = &data->res,
7791 .rpc_cred = data->cred,
7792 };
7793 struct rpc_task_setup task_setup_data = {
7794 .task = &data->task,
7795 .rpc_client = NFS_CLIENT(data->args.inode),
7796 .rpc_message = &msg,
7797 .callback_ops = &nfs4_layoutcommit_ops,
7798 .callback_data = data,
7799 .flags = RPC_TASK_ASYNC,
7800 };
7801 struct rpc_task *task;
7802 int status = 0;
7803
7804 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7805 "lbw: %llu inode %lu\n",
7806 data->task.tk_pid, sync,
7807 data->args.lastbytewritten,
7808 data->args.inode->i_ino);
7809
a9c92d6b 7810 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7811 task = rpc_run_task(&task_setup_data);
7812 if (IS_ERR(task))
7813 return PTR_ERR(task);
ef311537 7814 if (sync == false)
863a3c6c
AA		 7815 goto out;
7816 status = nfs4_wait_for_completion_rpc_task(task);
7817 if (status != 0)
7818 goto out;
7819 status = task->tk_status;
1037e6ea 7820 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 7821out:
7822 dprintk("%s: status %d\n", __func__, status);
7823 rpc_put_task(task);
7824 return status;
7825}
fca78d6d 7826
97431204
AA		 7827/**
7828 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7829 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7830 */
fca78d6d
BS		 7831static int
7832_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 7833 struct nfs_fsinfo *info,
7834 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 7835{
7836 struct nfs41_secinfo_no_name_args args = {
7837 .style = SECINFO_STYLE_CURRENT_FH,
7838 };
7839 struct nfs4_secinfo_res res = {
7840 .flavors = flavors,
7841 };
7842 struct rpc_message msg = {
7843 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7844 .rpc_argp = &args,
7845 .rpc_resp = &res,
7846 };
b1b3e136 7847 struct rpc_clnt *clnt = server->client;
7cb852df 7848 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 7849 int status;
7850
7851 if (use_integrity) {
7852 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 7853 cred = nfs4_get_clid_cred(server->nfs_client);
7854 msg.rpc_cred = cred;
b1b3e136
WAA		 7855 }
7856
7857 dprintk("--> %s\n", __func__);
7858 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
7859 &res.seq_res, 0);
7860 dprintk("<-- %s status=%d\n", __func__, status);
7861
7cb852df
WAA		 7862 if (cred)
7863 put_rpccred(cred);
b1b3e136
WAA		 7864
7865 return status;
fca78d6d
BS		 7866}
7867
7868static int
7869nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7870 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7871{
7872 struct nfs4_exception exception = { };
7873 int err;
7874 do {
b1b3e136
WAA		 7875 /* first try using integrity protection */
7876 err = -NFS4ERR_WRONGSEC;
7877
7878 /* try to use integrity protection with machine cred */
7879 if (_nfs4_is_integrity_protected(server->nfs_client))
7880 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
7881 flavors, true);
7882
7883 /*
7884 * if unable to use integrity protection, or SECINFO with
7885 * integrity protection returns NFS4ERR_WRONGSEC (which is
7886 * disallowed by spec, but exists in deployed servers) use
7887 * the current filesystem's rpc_client and the user cred.
7888 */
7889 if (err == -NFS4ERR_WRONGSEC)
7890 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
7891 flavors, false);
7892
fca78d6d
BS		 7893 switch (err) {
7894 case 0:
7895 case -NFS4ERR_WRONGSEC:
7896 case -NFS4ERR_NOTSUPP:
05e9cfb4 7897 goto out;
fca78d6d
BS		 7898 default:
7899 err = nfs4_handle_exception(server, err, &exception);
7900 }
7901 } while (exception.retry);
05e9cfb4 7902out:
fca78d6d
BS		 7903 return err;
7904}
7905
7906static int
7907nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
7908 struct nfs_fsinfo *info)
7909{
7910 int err;
7911 struct page *page;
367156d9 7912 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 7913 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 7914 struct nfs4_secinfo4 *secinfo;
7915 int i;
fca78d6d
BS		 7916
7917 page = alloc_page(GFP_KERNEL);
7918 if (!page) {
7919 err = -ENOMEM;
7920 goto out;
7921 }
7922
7923 flavors = page_address(page);
7924 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7925
7926 /*
7927 * Fall back on "guess and check" method if
7928 * the server doesn't support SECINFO_NO_NAME
7929 */
7930 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
7931 err = nfs4_find_root_sec(server, fhandle, info);
7932 goto out_freepage;
7933 }
7934 if (err)
7935 goto out_freepage;
7936
58a8cf12
WAA		 7937 for (i = 0; i < flavors->num_flavors; i++) {
7938 secinfo = &flavors->flavors[i];
7939
7940 switch (secinfo->flavor) {
7941 case RPC_AUTH_NULL:
7942 case RPC_AUTH_UNIX:
7943 case RPC_AUTH_GSS:
7944 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
7945 &secinfo->flavor_info);
7946 break;
7947 default:
7948 flavor = RPC_AUTH_MAXFLAVOR;
7949 break;
7950 }
7951
4d4b69dd
WAA		 7952 if (!nfs_auth_info_match(&server->auth_info, flavor))
7953 flavor = RPC_AUTH_MAXFLAVOR;
7954
58a8cf12
WAA		 7955 if (flavor != RPC_AUTH_MAXFLAVOR) {
7956 err = nfs4_lookup_root_sec(server, fhandle,
7957 info, flavor);
7958 if (!err)
7959 break;
7960 }
7961 }
7962
7963 if (flavor == RPC_AUTH_MAXFLAVOR)
7964 err = -EPERM;
fca78d6d
BS		 7965
7966out_freepage:
7967 put_page(page);
7968 if (err == -EACCES)
7969 return -EPERM;
7970out:
7971 return err;
7972}
1cab0652 7973
ab7cb0df
TM		 7974static int _nfs41_test_stateid(struct nfs_server *server,
7975 nfs4_stateid *stateid,
7976 struct rpc_cred *cred)
7d974794
BS		 7977{
7978 int status;
7979 struct nfs41_test_stateid_args args = {
1cab0652 7980 .stateid = stateid,
7d974794
BS		 7981 };
7982 struct nfs41_test_stateid_res res;
7983 struct rpc_message msg = {
7984 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
7985 .rpc_argp = &args,
7986 .rpc_resp = &res,
ab7cb0df 7987 .rpc_cred = cred,
7d974794 7988 };
3787d506
WAA		 7989 struct rpc_clnt *rpc_client = server->client;
7990
7991 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
7992 &rpc_client, &msg);
1cab0652 7993
38527b15 7994 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 7995 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 7996 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 7997 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 7998 &args.seq_args, &res.seq_res);
38527b15
CL		 7999 if (status != NFS_OK) {
8000 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8001 return status;
38527b15
CL		 8002 }
8003 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8004 return -res.status;
7d974794
BS		 8005}
8006
38527b15
CL		 8007/**
8008 * nfs41_test_stateid - perform a TEST_STATEID operation
8009 *
8010 * @server: server / transport on which to perform the operation
8011 * @stateid: state ID to test
ab7cb0df 8012 * @cred: credential
38527b15
CL		 8013 *
8014 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8015 * Otherwise a negative NFS4ERR value is returned if the operation
8016 * failed or the state ID is not currently valid.
8017 */
ab7cb0df
TM		 8018static int nfs41_test_stateid(struct nfs_server *server,
8019 nfs4_stateid *stateid,
8020 struct rpc_cred *cred)
7d974794
BS		 8021{
8022 struct nfs4_exception exception = { };
8023 int err;
8024 do {
ab7cb0df 8025 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8026 if (err != -NFS4ERR_DELAY)
8027 break;
8028 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8029 } while (exception.retry);
8030 return err;
8031}
9aeda35f 8032
7c1d5fae
TM		 8033struct nfs_free_stateid_data {
8034 struct nfs_server *server;
8035 struct nfs41_free_stateid_args args;
9aeda35f 8036 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8037};
8038
8039static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8040{
8041 struct nfs_free_stateid_data *data = calldata;
8042 nfs41_setup_sequence(nfs4_get_session(data->server),
8043 &data->args.seq_args,
8044 &data->res.seq_res,
8045 task);
8046}
8047
8048static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8049{
8050 struct nfs_free_stateid_data *data = calldata;
8051
8052 nfs41_sequence_done(task, &data->res.seq_res);
8053
8054 switch (task->tk_status) {
8055 case -NFS4ERR_DELAY:
8056 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
8057 rpc_restart_call_prepare(task);
8058 }
8059}
8060
8061static void nfs41_free_stateid_release(void *calldata)
8062{
8063 kfree(calldata);
8064}
8065
17f26b12 8066static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8067 .rpc_call_prepare = nfs41_free_stateid_prepare,
8068 .rpc_call_done = nfs41_free_stateid_done,
8069 .rpc_release = nfs41_free_stateid_release,
8070};
8071
8072static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8073 nfs4_stateid *stateid,
ab7cb0df 8074 struct rpc_cred *cred,
7c1d5fae
TM		 8075 bool privileged)
8076{
9aeda35f
BS		 8077 struct rpc_message msg = {
8078 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8079 .rpc_cred = cred,
9aeda35f 8080 };
7c1d5fae
TM		 8081 struct rpc_task_setup task_setup = {
8082 .rpc_client = server->client,
8083 .rpc_message = &msg,
8084 .callback_ops = &nfs41_free_stateid_ops,
8085 .flags = RPC_TASK_ASYNC,
8086 };
8087 struct nfs_free_stateid_data *data;
9aeda35f 8088
3787d506
WAA		 8089 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8090 &task_setup.rpc_client, &msg);
8091
38527b15 8092 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8093 data = kmalloc(sizeof(*data), GFP_NOFS);
8094 if (!data)
8095 return ERR_PTR(-ENOMEM);
8096 data->server = server;
8097 nfs4_stateid_copy(&data->args.stateid, stateid);
8098
8099 task_setup.callback_data = data;
8100
8101 msg.rpc_argp = &data->args;
8102 msg.rpc_resp = &data->res;
a9c92d6b 8103 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8104 if (privileged)
8105 nfs4_set_sequence_privileged(&data->args.seq_args);
8106
8107 return rpc_run_task(&task_setup);
9aeda35f
BS		 8108}
8109
38527b15
CL		 8110/**
8111 * nfs41_free_stateid - perform a FREE_STATEID operation
8112 *
8113 * @server: server / transport on which to perform the operation
8114 * @stateid: state ID to release
ab7cb0df 8115 * @cred: credential
38527b15
CL		 8116 *
8117 * Returns NFS_OK if the server freed "stateid". Otherwise a
8118 * negative NFS4ERR value is returned.
8119 */
ab7cb0df
TM		 8120static int nfs41_free_stateid(struct nfs_server *server,
8121 nfs4_stateid *stateid,
8122 struct rpc_cred *cred)
9aeda35f 8123{
7c1d5fae
TM		 8124 struct rpc_task *task;
8125 int ret;
8126
ab7cb0df 8127 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8128 if (IS_ERR(task))
8129 return PTR_ERR(task);
8130 ret = rpc_wait_for_completion_task(task);
8131 if (!ret)
8132 ret = task->tk_status;
8133 rpc_put_task(task);
8134 return ret;
9aeda35f 8135}
36281caa 8136
c8b2d0bf
TM		 8137static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
8138{
8139 struct rpc_task *task;
ab7cb0df 8140 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8141
ab7cb0df 8142 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8143 nfs4_free_lock_state(server, lsp);
8144 if (IS_ERR(task))
8145 return PTR_ERR(task);
8146 rpc_put_task(task);
8147 return 0;
8148}
8149
36281caa
TM		 8150static bool nfs41_match_stateid(const nfs4_stateid *s1,
8151 const nfs4_stateid *s2)
8152{
2d2f24ad 8153 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8154 return false;
8155
2d2f24ad 8156 if (s1->seqid == s2->seqid)
36281caa 8157 return true;
2d2f24ad 8158 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8159 return true;
8160
8161 return false;
8162}
8163
557134a3
AA		 8164#endif /* CONFIG_NFS_V4_1 */
8165
36281caa
TM		 8166static bool nfs4_match_stateid(const nfs4_stateid *s1,
8167 const nfs4_stateid *s2)
8168{
f597c537 8169 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8170}
8171
8172
17280175 8173static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8174 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8175 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8176 .recover_open = nfs4_open_reclaim,
8177 .recover_lock = nfs4_lock_reclaim,
591d71cb 8178 .establish_clid = nfs4_init_clientid,
05f4c350 8179 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8180};
8181
591d71cb 8182#if defined(CONFIG_NFS_V4_1)
17280175 8183static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8184 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8185 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8186 .recover_open = nfs4_open_reclaim,
8187 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8188 .establish_clid = nfs41_init_clientid,
fce5c838 8189 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8190 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8191};
8192#endif /* CONFIG_NFS_V4_1 */
8193
17280175 8194static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8195 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8196 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8197 .recover_open = nfs4_open_expired,
8198 .recover_lock = nfs4_lock_expired,
8199 .establish_clid = nfs4_init_clientid,
8200};
8201
8202#if defined(CONFIG_NFS_V4_1)
17280175 8203static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8204 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8205 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8206 .recover_open = nfs41_open_expired,
8207 .recover_lock = nfs41_lock_expired,
4d643d1d 8208 .establish_clid = nfs41_init_clientid,
1da177e4 8209};
591d71cb 8210#endif /* CONFIG_NFS_V4_1 */
1da177e4 8211
17280175 8212static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8213 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8214 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8215 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8216};
8217
8218#if defined(CONFIG_NFS_V4_1)
17280175 8219static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8220 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8221 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8222 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8223};
8224#endif
8225
ec011fe8 8226static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8227 .get_locations = _nfs40_proc_get_locations,
44c99933 8228 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8229};
8230
8231#if defined(CONFIG_NFS_V4_1)
8232static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8233 .get_locations = _nfs41_proc_get_locations,
44c99933 8234 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8235};
8236#endif /* CONFIG_NFS_V4_1 */
8237
97dc1359
TM		 8238static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8239 .minor_version = 0,
39c6daae
TM		 8240 .init_caps = NFS_CAP_READDIRPLUS
8241 | NFS_CAP_ATOMIC_OPEN
8242 | NFS_CAP_CHANGE_ATTR
8243 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8244 .init_client = nfs40_init_client,
8245 .shutdown_client = nfs40_shutdown_client,
36281caa 8246 .match_stateid = nfs4_match_stateid,
fca78d6d 8247 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8248 .free_lock_state = nfs4_release_lockowner,
9915ea7e 8249 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8250 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8251 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8252 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8253 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8254};
8255
8256#if defined(CONFIG_NFS_V4_1)
8257static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8258 .minor_version = 1,
39c6daae
TM		 8259 .init_caps = NFS_CAP_READDIRPLUS
8260 | NFS_CAP_ATOMIC_OPEN
8261 | NFS_CAP_CHANGE_ATTR
3b66486c 8262 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 8263 | NFS_CAP_STATEID_NFSV41
8264 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8265 .init_client = nfs41_init_client,
8266 .shutdown_client = nfs41_shutdown_client,
36281caa 8267 .match_stateid = nfs41_match_stateid,
fca78d6d 8268 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8269 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8270 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8271 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8272 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8273 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8274 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8275};
8276#endif
8277
42c2c424
SD		 8278#if defined(CONFIG_NFS_V4_2)
8279static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8280 .minor_version = 2,
7017310a
BS		 8281 .init_caps = NFS_CAP_READDIRPLUS
8282 | NFS_CAP_ATOMIC_OPEN
8283 | NFS_CAP_CHANGE_ATTR
8284 | NFS_CAP_POSIX_LOCK
8285 | NFS_CAP_STATEID_NFSV41
8286 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8287 .init_client = nfs41_init_client,
8288 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8289 .match_stateid = nfs41_match_stateid,
8290 .find_root_sec = nfs41_find_root_sec,
7017310a 8291 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8292 .call_sync_ops = &nfs41_call_sync_ops,
42c2c424
SD		 8293 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8294 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8295 .state_renewal_ops = &nfs41_state_renewal_ops,
8296};
8297#endif
8298
97dc1359
TM		 8299const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8300 [0] = &nfs_v4_0_minor_ops,
8301#if defined(CONFIG_NFS_V4_1)
8302 [1] = &nfs_v4_1_minor_ops,
8303#endif
42c2c424
SD		 8304#if defined(CONFIG_NFS_V4_2)
8305 [2] = &nfs_v4_2_minor_ops,
8306#endif
97dc1359
TM		 8307};
8308
17f26b12 8309static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8310 .create = nfs_create,
8311 .lookup = nfs_lookup,
8312 .atomic_open = nfs_atomic_open,
8313 .link = nfs_link,
8314 .unlink = nfs_unlink,
8315 .symlink = nfs_symlink,
8316 .mkdir = nfs_mkdir,
8317 .rmdir = nfs_rmdir,
8318 .mknod = nfs_mknod,
8319 .rename = nfs_rename,
8320 .permission = nfs_permission,
8321 .getattr = nfs_getattr,
8322 .setattr = nfs_setattr,
8323 .getxattr = generic_getxattr,
8324 .setxattr = generic_setxattr,
8325 .listxattr = generic_listxattr,
8326 .removexattr = generic_removexattr,
8327};
8328
92e1d5be 8329static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8330 .permission = nfs_permission,
8331 .getattr = nfs_getattr,
8332 .setattr = nfs_setattr,
64c2ce8b
AK		 8333 .getxattr = generic_getxattr,
8334 .setxattr = generic_setxattr,
8335 .listxattr = generic_listxattr,
8336 .removexattr = generic_removexattr,
6b3b5496
BF		 8337};
8338
509de811 8339const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8340 .version = 4, /* protocol version */
8341 .dentry_ops = &nfs4_dentry_operations,
8342 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8343 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8344 .file_ops = &nfs4_file_operations,
1da177e4 8345 .getroot = nfs4_proc_get_root,
281cad46 8346 .submount = nfs4_submount,
ff9099f2 8347 .try_mount = nfs4_try_mount,
1da177e4
LT		 8348 .getattr = nfs4_proc_getattr,
8349 .setattr = nfs4_proc_setattr,
8350 .lookup = nfs4_proc_lookup,
8351 .access = nfs4_proc_access,
8352 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8353 .create = nfs4_proc_create,
8354 .remove = nfs4_proc_remove,
8355 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8356 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 8357 .unlink_done = nfs4_proc_unlink_done,
8358 .rename = nfs4_proc_rename,
d3d4152a 8359 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8360 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8361 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8362 .link = nfs4_proc_link,
8363 .symlink = nfs4_proc_symlink,
8364 .mkdir = nfs4_proc_mkdir,
8365 .rmdir = nfs4_proc_remove,
8366 .readdir = nfs4_proc_readdir,
8367 .mknod = nfs4_proc_mknod,
8368 .statfs = nfs4_proc_statfs,
8369 .fsinfo = nfs4_proc_fsinfo,
8370 .pathconf = nfs4_proc_pathconf,
e9326dca 8371 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 8372 .decode_dirent = nfs4_decode_dirent,
8373 .read_setup = nfs4_proc_read_setup,
1abb5088 8374 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 8375 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 8376 .read_done = nfs4_read_done,
1da177e4 8377 .write_setup = nfs4_proc_write_setup,
57208fa7 8378 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 8379 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 8380 .write_done = nfs4_write_done,
1da177e4 8381 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8382 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8383 .commit_done = nfs4_commit_done,
1da177e4 8384 .lock = nfs4_proc_lock,
e50a1c2e 8385 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8386 .close_context = nfs4_close_context,
2b484297 8387 .open_context = nfs4_atomic_open,
011e2a7f 8388 .have_delegation = nfs4_have_delegation,
57ec14c5 8389 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8390 .alloc_client = nfs4_alloc_client,
45a52a02 8391 .init_client = nfs4_init_client,
cdb7eced 8392 .free_client = nfs4_free_client,
1179acc6
BS		 8393 .create_server = nfs4_create_server,
8394 .clone_server = nfs_clone_server,
1da177e4
LT		 8395};
8396
64c2ce8b
AK		 8397static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8398 .prefix = XATTR_NAME_NFSV4_ACL,
8399 .list = nfs4_xattr_list_nfs4_acl,
8400 .get = nfs4_xattr_get_nfs4_acl,
8401 .set = nfs4_xattr_set_nfs4_acl,
8402};
8403
8404const struct xattr_handler *nfs4_xattr_handlers[] = {
8405 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8406#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8407 &nfs4_xattr_nfs4_label_handler,
8408#endif
64c2ce8b
AK		 8409 NULL
8410};
8411
1da177e4
LT		 8412/*
8413 * Local variables:
8414 * c-basic-offset: 8
8415 * End:
8416 */
Linux 6.x block layer and io_uring tree(s)