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NFS: Implement support for NFS4ERR_LEASE_MOVED
[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
9a744ba3 2876 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
8f70e95f 2877 status = nfs4_lookup_root_sec(server, fhandle, info, flav_array[i]);
fb8a5ba8 2878 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
d1a8016a
BS		 2879 continue;
2880 break;
8f70e95f 2881 }
9a744ba3 2882
fb8a5ba8
BS		 2883 /*
2884 * -EACCESS could mean that the user doesn't have correct permissions
2885 * to access the mount. It could also mean that we tried to mount
2886 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
2887 * existing mount programs don't handle -EACCES very well so it should
2888 * be mapped to -EPERM instead.
2889 */
2890 if (status == -EACCES)
2891 status = -EPERM;
801a16dc
BS		 2892 return status;
2893}
2894
2ed4b95b
CL		 2895static int nfs4_do_find_root_sec(struct nfs_server *server,
2896 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
2897{
2898 int mv = server->nfs_client->cl_minorversion;
2899 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
2900}
2901
2902/**
2903 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
2904 * @server: initialized nfs_server handle
2905 * @fhandle: we fill in the pseudo-fs root file handle
2906 * @info: we fill in an FSINFO struct
5e6b1990 2907 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 2908 *
2909 * Returns zero on success, or a negative errno.
801a16dc 2910 */
3028eb2b 2911int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 2912 struct nfs_fsinfo *info,
2913 bool auth_probe)
801a16dc 2914{
2ed4b95b
CL		 2915 int status;
2916
5e6b1990
TM		 2917 switch (auth_probe) {
2918 case false:
2919 status = nfs4_lookup_root(server, fhandle, info);
2920 if (status != -NFS4ERR_WRONGSEC)
2921 break;
2922 /* Did user force a 'sec=' mount option? */
2923 if (server->flags & NFS_MOUNT_SECFLAVOUR)
2924 break;
2925 default:
2ed4b95b 2926 status = nfs4_do_find_root_sec(server, fhandle, info);
5e6b1990 2927 }
2ed4b95b 2928
1da177e4
LT		 2929 if (status == 0)
2930 status = nfs4_server_capabilities(server, fhandle);
2931 if (status == 0)
2932 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 2933
c12e87f4 2934 return nfs4_map_errors(status);
1da177e4
LT		 2935}
2936
bae36241
BS		 2937static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
2938 struct nfs_fsinfo *info)
2939{
2940 int error;
2941 struct nfs_fattr *fattr = info->fattr;
1775fd3e 2942 struct nfs4_label *label = NULL;
bae36241
BS		 2943
2944 error = nfs4_server_capabilities(server, mntfh);
2945 if (error < 0) {
2946 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
2947 return error;
2948 }
2949
14c43f76
DQ		 2950 label = nfs4_label_alloc(server, GFP_KERNEL);
2951 if (IS_ERR(label))
2952 return PTR_ERR(label);
2953
1775fd3e 2954 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 2955 if (error < 0) {
2956 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 2957 goto err_free_label;
bae36241
BS		 2958 }
2959
2960 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
2961 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
2962 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
2963
14c43f76
DQ		 2964err_free_label:
2965 nfs4_label_free(label);
2966
bae36241
BS		 2967 return error;
2968}
2969
6b97fd3d
MN		 2970/*
2971 * Get locations and (maybe) other attributes of a referral.
2972 * Note that we'll actually follow the referral later when
2973 * we detect fsid mismatch in inode revalidation
2974 */
f05d147f
BS		 2975static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
2976 const struct qstr *name, struct nfs_fattr *fattr,
2977 struct nfs_fh *fhandle)
6b97fd3d
MN		 2978{
2979 int status = -ENOMEM;
2980 struct page *page = NULL;
2981 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 2982
2983 page = alloc_page(GFP_KERNEL);
2984 if (page == NULL)
2985 goto out;
2986 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
2987 if (locations == NULL)
2988 goto out;
2989
f05d147f 2990 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 2991 if (status != 0)
2992 goto out;
519ae255
CL		 2993
2994 /*
2995 * If the fsid didn't change, this is a migration event, not a
2996 * referral. Cause us to drop into the exception handler, which
2997 * will kick off migration recovery.
2998 */
6b97fd3d 2999 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3000 dprintk("%s: server did not return a different fsid for"
3001 " a referral at %s\n", __func__, name->name);
519ae255 3002 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3003 goto out;
3004 }
533eb461
AA		 3005 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3006 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3007
533eb461 3008 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3009 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3010 memset(fhandle, 0, sizeof(struct nfs_fh));
3011out:
3012 if (page)
3013 __free_page(page);
5d7ca35a 3014 kfree(locations);
6b97fd3d
MN		 3015 return status;
3016}
3017
1775fd3e
DQ		 3018static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3019 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3020{
3021 struct nfs4_getattr_arg args = {
3022 .fh = fhandle,
3023 .bitmask = server->attr_bitmask,
3024 };
3025 struct nfs4_getattr_res res = {
3026 .fattr = fattr,
1775fd3e 3027 .label = label,
1da177e4
LT		 3028 .server = server,
3029 };
3030 struct rpc_message msg = {
3031 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3032 .rpc_argp = &args,
3033 .rpc_resp = &res,
3034 };
aa9c2669
DQ		 3035
3036 args.bitmask = nfs4_bitmask(server, label);
3037
0e574af1 3038 nfs_fattr_init(fattr);
7c513058 3039 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3040}
3041
1775fd3e
DQ		 3042static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3043 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3044{
3045 struct nfs4_exception exception = { };
3046 int err;
3047 do {
b5f875a9
TM		 3048 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3049 trace_nfs4_getattr(server, fhandle, fattr, err);
3050 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3051 &exception);
3052 } while (exception.retry);
3053 return err;
3054}
3055
3056/*
3057 * The file is not closed if it is opened due to the a request to change
3058 * the size of the file. The open call will not be needed once the
3059 * VFS layer lookup-intents are implemented.
3060 *
3061 * Close is called when the inode is destroyed.
3062 * If we haven't opened the file for O_WRONLY, we
3063 * need to in the size_change case to obtain a stateid.
3064 *
3065 * Got race?
3066 * Because OPEN is always done by name in nfsv4, it is
3067 * possible that we opened a different file by the same
3068 * name. We can recognize this race condition, but we
3069 * can't do anything about it besides returning an error.
3070 *
3071 * This will be fixed with VFS changes (lookup-intent).
3072 */
3073static int
3074nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3075 struct iattr *sattr)
3076{
08e9eac4 3077 struct inode *inode = dentry->d_inode;
659bfcd6 3078 struct rpc_cred *cred = NULL;
d530838b 3079 struct nfs4_state *state = NULL;
14c43f76 3080 struct nfs4_label *label = NULL;
1da177e4
LT		 3081 int status;
3082
8a1636c4 3083 if (pnfs_ld_layoutret_on_setattr(inode))
24028672 3084 pnfs_commit_and_return_layout(inode);
8a1636c4 3085
0e574af1 3086 nfs_fattr_init(fattr);
1da177e4 3087
2669940d
AA		 3088 /* Deal with open(O_TRUNC) */
3089 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3090 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3091
3092 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3093 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3094 return 0;
3095
d530838b 3096 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3097 if (sattr->ia_valid & ATTR_FILE) {
3098 struct nfs_open_context *ctx;
3099
3100 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3101 if (ctx) {
3102 cred = ctx->cred;
3103 state = ctx->state;
3104 }
659bfcd6 3105 }
08e9eac4 3106
14c43f76
DQ		 3107 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3108 if (IS_ERR(label))
3109 return PTR_ERR(label);
3110
3111 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3112 if (status == 0) {
65e4308d 3113 nfs_setattr_update_inode(inode, sattr);
aa9c2669
DQ		 3114 nfs_setsecurity(inode, fattr, label);
3115 }
14c43f76 3116 nfs4_label_free(label);
1da177e4
LT		 3117 return status;
3118}
3119
0c2e53f1
TM		 3120static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3121 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3122 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3123{
0c2e53f1 3124 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3125 int status;
3126 struct nfs4_lookup_arg args = {
3127 .bitmask = server->attr_bitmask,
0c2e53f1 3128 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3129 .name = name,
3130 };
3131 struct nfs4_lookup_res res = {
3132 .server = server,
3133 .fattr = fattr,
aa9c2669 3134 .label = label,
2b3de441
DH		 3135 .fh = fhandle,
3136 };
3137 struct rpc_message msg = {
3138 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3139 .rpc_argp = &args,
3140 .rpc_resp = &res,
3141 };
3142
aa9c2669
DQ		 3143 args.bitmask = nfs4_bitmask(server, label);
3144
2b3de441
DH		 3145 nfs_fattr_init(fattr);
3146
1da177e4 3147 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3148 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3149 dprintk("NFS reply lookup: %d\n", status);
3150 return status;
3151}
3152
72de53ec 3153static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3154{
7ebb9315 3155 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3156 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3157 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3158 fattr->nlink = 2;
3159}
3160
72de53ec
BS		 3161static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3162 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3163 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3164{
3165 struct nfs4_exception exception = { };
72de53ec 3166 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3167 int err;
3168 do {
1775fd3e 3169 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3170 trace_nfs4_lookup(dir, name, err);
72de53ec 3171 switch (err) {
08ef7bd3 3172 case -NFS4ERR_BADNAME:
72de53ec
BS		 3173 err = -ENOENT;
3174 goto out;
0c2e53f1 3175 case -NFS4ERR_MOVED:
f05d147f 3176 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
72de53ec 3177 goto out;
0c2e53f1 3178 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3179 err = -EPERM;
3180 if (client != *clnt)
3181 goto out;
41d058c3
TM		 3182 /* No security negotiation if the user specified 'sec=' */
3183 if (NFS_SERVER(dir)->flags & NFS_MOUNT_SECFLAVOUR)
3184 goto out;
72de53ec
BS		 3185 client = nfs4_create_sec_client(client, dir, name);
3186 if (IS_ERR(client))
3187 return PTR_ERR(client);
3188
3189 exception.retry = 1;
3190 break;
3191 default:
3192 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3193 }
1da177e4 3194 } while (exception.retry);
72de53ec
BS		 3195
3196out:
3197 if (err == 0)
3198 *clnt = client;
3199 else if (client != *clnt)
3200 rpc_shutdown_client(client);
3201
1da177e4
LT		 3202 return err;
3203}
3204
80a16b21 3205static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3206 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3207 struct nfs4_label *label)
72de53ec
BS		 3208{
3209 int status;
3210 struct rpc_clnt *client = NFS_CLIENT(dir);
3211
1775fd3e 3212 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3213 if (client != NFS_CLIENT(dir)) {
3214 rpc_shutdown_client(client);
3215 nfs_fixup_secinfo_attributes(fattr);
3216 }
3217 return status;
3218}
3219
f05d147f
BS		 3220struct rpc_clnt *
3221nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3222 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3223{
b72888cb 3224 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3225 int status;
f05d147f 3226
1775fd3e 3227 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3228 if (status < 0)
f05d147f 3229 return ERR_PTR(status);
b72888cb 3230 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3231}
3232
1da177e4
LT		 3233static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3234{
76b32999 3235 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3236 struct nfs4_accessargs args = {
3237 .fh = NFS_FH(inode),
a4980e78 3238 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3239 };
3240 struct nfs4_accessres res = {
3241 .server = server,
1da177e4 3242 };
1da177e4
LT		 3243 struct rpc_message msg = {
3244 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3245 .rpc_argp = &args,
3246 .rpc_resp = &res,
3247 .rpc_cred = entry->cred,
3248 };
3249 int mode = entry->mask;
aa9c2669 3250 int status = 0;
1da177e4
LT		 3251
3252 /*
3253 * Determine which access bits we want to ask for...
3254 */
3255 if (mode & MAY_READ)
3256 args.access |= NFS4_ACCESS_READ;
3257 if (S_ISDIR(inode->i_mode)) {
3258 if (mode & MAY_WRITE)
3259 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3260 if (mode & MAY_EXEC)
3261 args.access |= NFS4_ACCESS_LOOKUP;
3262 } else {
3263 if (mode & MAY_WRITE)
3264 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3265 if (mode & MAY_EXEC)
3266 args.access |= NFS4_ACCESS_EXECUTE;
3267 }
c407d41a
TM		 3268
3269 res.fattr = nfs_alloc_fattr();
3270 if (res.fattr == NULL)
3271 return -ENOMEM;
3272
7c513058 3273 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3274 if (!status) {
6168f62c 3275 nfs_access_set_mask(entry, res.access);
c407d41a 3276 nfs_refresh_inode(inode, res.fattr);
1da177e4 3277 }
c407d41a 3278 nfs_free_fattr(res.fattr);
1da177e4
LT		 3279 return status;
3280}
3281
3282static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3283{
3284 struct nfs4_exception exception = { };
3285 int err;
3286 do {
c1578b76
TM		 3287 err = _nfs4_proc_access(inode, entry);
3288 trace_nfs4_access(inode, err);
3289 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3290 &exception);
3291 } while (exception.retry);
3292 return err;
3293}
3294
3295/*
3296 * TODO: For the time being, we don't try to get any attributes
3297 * along with any of the zero-copy operations READ, READDIR,
3298 * READLINK, WRITE.
3299 *
3300 * In the case of the first three, we want to put the GETATTR
3301 * after the read-type operation -- this is because it is hard
3302 * to predict the length of a GETATTR response in v4, and thus
3303 * align the READ data correctly. This means that the GETATTR
3304 * may end up partially falling into the page cache, and we should
3305 * shift it into the 'tail' of the xdr_buf before processing.
3306 * To do this efficiently, we need to know the total length
3307 * of data received, which doesn't seem to be available outside
3308 * of the RPC layer.
3309 *
3310 * In the case of WRITE, we also want to put the GETATTR after
3311 * the operation -- in this case because we want to make sure
140150db 3312 * we get the post-operation mtime and size.
1da177e4
LT		 3313 *
3314 * Both of these changes to the XDR layer would in fact be quite
3315 * minor, but I decided to leave them for a subsequent patch.
3316 */
3317static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3318 unsigned int pgbase, unsigned int pglen)
3319{
3320 struct nfs4_readlink args = {
3321 .fh = NFS_FH(inode),
3322 .pgbase = pgbase,
3323 .pglen = pglen,
3324 .pages = &page,
3325 };
f50c7000 3326 struct nfs4_readlink_res res;
1da177e4
LT		 3327 struct rpc_message msg = {
3328 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3329 .rpc_argp = &args,
f50c7000 3330 .rpc_resp = &res,
1da177e4
LT		 3331 };
3332
7c513058 3333 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3334}
3335
3336static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3337 unsigned int pgbase, unsigned int pglen)
3338{
3339 struct nfs4_exception exception = { };
3340 int err;
3341 do {
c1578b76
TM		 3342 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3343 trace_nfs4_readlink(inode, err);
3344 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3345 &exception);
3346 } while (exception.retry);
3347 return err;
3348}
3349
1da177e4 3350/*
8867fe58 3351 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3352 */
1da177e4
LT		 3353static int
3354nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3355 int flags)
1da177e4 3356{
aa9c2669 3357 struct nfs4_label l, *ilabel = NULL;
8867fe58 3358 struct nfs_open_context *ctx;
1da177e4 3359 struct nfs4_state *state;
5bc2afc2 3360 int opened = 0;
1da177e4
LT		 3361 int status = 0;
3362
8867fe58
MS		 3363 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3364 if (IS_ERR(ctx))
3365 return PTR_ERR(ctx);
3366
aa9c2669
DQ		 3367 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3368
a8a5da99 3369 sattr->ia_mode &= ~current_umask();
5bc2afc2 3370 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3371 if (IS_ERR(state)) {
3372 status = PTR_ERR(state);
c0204fd2 3373 goto out;
1da177e4 3374 }
1da177e4 3375out:
aa9c2669 3376 nfs4_label_release_security(ilabel);
8867fe58 3377 put_nfs_open_context(ctx);
1da177e4
LT		 3378 return status;
3379}
3380
3381static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3382{
16e42959 3383 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3384 struct nfs_removeargs args = {
1da177e4 3385 .fh = NFS_FH(dir),
26fe5750 3386 .name = *name,
16e42959 3387 };
4fdc17b2 3388 struct nfs_removeres res = {
16e42959 3389 .server = server,
1da177e4 3390 };
1da177e4 3391 struct rpc_message msg = {
4fdc17b2
TM		 3392 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3393 .rpc_argp = &args,
3394 .rpc_resp = &res,
1da177e4 3395 };
778d2817 3396 int status;
1da177e4 3397
7c513058 3398 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3399 if (status == 0)
16e42959 3400 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3401 return status;
3402}
3403
3404static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3405{
3406 struct nfs4_exception exception = { };
3407 int err;
3408 do {
078ea3df
TM		 3409 err = _nfs4_proc_remove(dir, name);
3410 trace_nfs4_remove(dir, name, err);
3411 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3412 &exception);
3413 } while (exception.retry);
3414 return err;
3415}
3416
e4eff1a6 3417static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3418{
e4eff1a6
TM		 3419 struct nfs_server *server = NFS_SERVER(dir);
3420 struct nfs_removeargs *args = msg->rpc_argp;
3421 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3422
e4eff1a6 3423 res->server = server;
1da177e4 3424 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3425 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3426
3427 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3428}
3429
34e137cc
BS		 3430static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3431{
d9afbd1b
TM		 3432 nfs4_setup_sequence(NFS_SERVER(data->dir),
3433 &data->args.seq_args,
3434 &data->res.seq_res,
3435 task);
1da177e4
LT		 3436}
3437
e4eff1a6 3438static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3439{
078ea3df
TM		 3440 struct nfs_unlinkdata *data = task->tk_calldata;
3441 struct nfs_removeres *res = &data->res;
e4eff1a6 3442
14516c3a
TM		 3443 if (!nfs4_sequence_done(task, &res->seq_res))
3444 return 0;
9e33bed5 3445 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
e4eff1a6
TM		 3446 return 0;
3447 update_changeattr(dir, &res->cinfo);
e4eff1a6 3448 return 1;
1da177e4
LT		 3449}
3450
d3d4152a
JL		 3451static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3452{
3453 struct nfs_server *server = NFS_SERVER(dir);
3454 struct nfs_renameargs *arg = msg->rpc_argp;
3455 struct nfs_renameres *res = msg->rpc_resp;
3456
3457 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3458 res->server = server;
a9c92d6b 3459 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3460}
3461
c6bfa1a1
BS		 3462static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3463{
d9afbd1b
TM		 3464 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3465 &data->args.seq_args,
3466 &data->res.seq_res,
3467 task);
d3d4152a
JL		 3468}
3469
3470static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3471 struct inode *new_dir)
3472{
fbc6f7c2
TM		 3473 struct nfs_renamedata *data = task->tk_calldata;
3474 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3475
3476 if (!nfs4_sequence_done(task, &res->seq_res))
3477 return 0;
3478 if (nfs4_async_handle_error(task, res->server, NULL) == -EAGAIN)
3479 return 0;
3480
3481 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3482 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3483 return 1;
3484}
3485
1da177e4
LT		 3486static int _nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3487 struct inode *new_dir, struct qstr *new_name)
3488{
6caf2c82 3489 struct nfs_server *server = NFS_SERVER(old_dir);
920769f0 3490 struct nfs_renameargs arg = {
1da177e4
LT		 3491 .old_dir = NFS_FH(old_dir),
3492 .new_dir = NFS_FH(new_dir),
3493 .old_name = old_name,
3494 .new_name = new_name,
6caf2c82 3495 };
e8582a8b 3496 struct nfs_renameres res = {
6caf2c82 3497 .server = server,
1da177e4 3498 };
1da177e4
LT		 3499 struct rpc_message msg = {
3500 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME],
3501 .rpc_argp = &arg,
3502 .rpc_resp = &res,
3503 };
011fff72 3504 int status = -ENOMEM;
14c43f76 3505
7c513058 3506 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
1da177e4
LT		 3507 if (!status) {
3508 update_changeattr(old_dir, &res.old_cinfo);
3509 update_changeattr(new_dir, &res.new_cinfo);
3510 }
3511 return status;
3512}
3513
3514static int nfs4_proc_rename(struct inode *old_dir, struct qstr *old_name,
3515 struct inode *new_dir, struct qstr *new_name)
3516{
3517 struct nfs4_exception exception = { };
3518 int err;
3519 do {
fbc6f7c2
TM		 3520 err = _nfs4_proc_rename(old_dir, old_name,
3521 new_dir, new_name);
3522 trace_nfs4_rename(old_dir, old_name, new_dir, new_name, err);
3523 err = nfs4_handle_exception(NFS_SERVER(old_dir), err,
1da177e4
LT		 3524 &exception);
3525 } while (exception.retry);
3526 return err;
3527}
3528
3529static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3530{
91ba2eee 3531 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3532 struct nfs4_link_arg arg = {
3533 .fh = NFS_FH(inode),
3534 .dir_fh = NFS_FH(dir),
3535 .name = name,
91ba2eee
TM		 3536 .bitmask = server->attr_bitmask,
3537 };
91ba2eee
TM		 3538 struct nfs4_link_res res = {
3539 .server = server,
1775fd3e 3540 .label = NULL,
1da177e4 3541 };
1da177e4
LT		 3542 struct rpc_message msg = {
3543 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3544 .rpc_argp = &arg,
91ba2eee 3545 .rpc_resp = &res,
1da177e4 3546 };
136f2627
TM		 3547 int status = -ENOMEM;
3548
3549 res.fattr = nfs_alloc_fattr();
778d2817 3550 if (res.fattr == NULL)
136f2627 3551 goto out;
1da177e4 3552
14c43f76
DQ		 3553 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3554 if (IS_ERR(res.label)) {
3555 status = PTR_ERR(res.label);
3556 goto out;
3557 }
aa9c2669 3558 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3559
7c513058 3560 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3561 if (!status) {
3562 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3563 status = nfs_post_op_update_inode(inode, res.fattr);
3564 if (!status)
3565 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3566 }
14c43f76
DQ		 3567
3568
3569 nfs4_label_free(res.label);
3570
136f2627 3571out:
136f2627 3572 nfs_free_fattr(res.fattr);
1da177e4
LT		 3573 return status;
3574}
3575
3576static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3577{
3578 struct nfs4_exception exception = { };
3579 int err;
3580 do {
3581 err = nfs4_handle_exception(NFS_SERVER(inode),
3582 _nfs4_proc_link(inode, dir, name),
3583 &exception);
3584 } while (exception.retry);
3585 return err;
3586}
3587
57dc9a57
TM		 3588struct nfs4_createdata {
3589 struct rpc_message msg;
3590 struct nfs4_create_arg arg;
3591 struct nfs4_create_res res;
3592 struct nfs_fh fh;
3593 struct nfs_fattr fattr;
1775fd3e 3594 struct nfs4_label *label;
57dc9a57
TM		 3595};
3596
3597static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3598 struct qstr *name, struct iattr *sattr, u32 ftype)
3599{
3600 struct nfs4_createdata *data;
3601
3602 data = kzalloc(sizeof(*data), GFP_KERNEL);
3603 if (data != NULL) {
3604 struct nfs_server *server = NFS_SERVER(dir);
3605
14c43f76
DQ		 3606 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3607 if (IS_ERR(data->label))
3608 goto out_free;
3609
57dc9a57
TM		 3610 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3611 data->msg.rpc_argp = &data->arg;
3612 data->msg.rpc_resp = &data->res;
3613 data->arg.dir_fh = NFS_FH(dir);
3614 data->arg.server = server;
3615 data->arg.name = name;
3616 data->arg.attrs = sattr;
3617 data->arg.ftype = ftype;
aa9c2669 3618 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3619 data->res.server = server;
3620 data->res.fh = &data->fh;
3621 data->res.fattr = &data->fattr;
1775fd3e 3622 data->res.label = data->label;
57dc9a57 3623 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3624 }
3625 return data;
14c43f76
DQ		 3626out_free:
3627 kfree(data);
3628 return NULL;
57dc9a57
TM		 3629}
3630
3631static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3632{
7c513058 3633 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3634 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3635 if (status == 0) {
3636 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3637 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3638 }
3639 return status;
3640}
3641
3642static void nfs4_free_createdata(struct nfs4_createdata *data)
3643{
14c43f76 3644 nfs4_label_free(data->label);
57dc9a57
TM		 3645 kfree(data);
3646}
3647
4f390c15 3648static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3649 struct page *page, unsigned int len, struct iattr *sattr,
3650 struct nfs4_label *label)
1da177e4 3651{
57dc9a57
TM		 3652 struct nfs4_createdata *data;
3653 int status = -ENAMETOOLONG;
1da177e4 3654
94a6d753 3655 if (len > NFS4_MAXPATHLEN)
57dc9a57 3656 goto out;
4f390c15 3657
57dc9a57
TM		 3658 status = -ENOMEM;
3659 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3660 if (data == NULL)
3661 goto out;
3662
3663 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3664 data->arg.u.symlink.pages = &page;
3665 data->arg.u.symlink.len = len;
1775fd3e 3666 data->arg.label = label;
1da177e4 3667
57dc9a57
TM		 3668 status = nfs4_do_create(dir, dentry, data);
3669
3670 nfs4_free_createdata(data);
3671out:
1da177e4
LT		 3672 return status;
3673}
3674
4f390c15 3675static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3676 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3677{
3678 struct nfs4_exception exception = { };
aa9c2669 3679 struct nfs4_label l, *label = NULL;
1da177e4 3680 int err;
aa9c2669
DQ		 3681
3682 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3683
1da177e4 3684 do {
078ea3df
TM		 3685 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3686 trace_nfs4_symlink(dir, &dentry->d_name, err);
3687 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3688 &exception);
3689 } while (exception.retry);
aa9c2669
DQ		 3690
3691 nfs4_label_release_security(label);
1da177e4
LT		 3692 return err;
3693}
3694
3695static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3696 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3697{
57dc9a57
TM		 3698 struct nfs4_createdata *data;
3699 int status = -ENOMEM;
1da177e4 3700
57dc9a57
TM		 3701 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3702 if (data == NULL)
3703 goto out;
3704
1775fd3e 3705 data->arg.label = label;
57dc9a57
TM		 3706 status = nfs4_do_create(dir, dentry, data);
3707
3708 nfs4_free_createdata(data);
3709out:
1da177e4
LT		 3710 return status;
3711}
3712
3713static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3714 struct iattr *sattr)
3715{
3716 struct nfs4_exception exception = { };
aa9c2669 3717 struct nfs4_label l, *label = NULL;
1da177e4 3718 int err;
a8a5da99 3719
aa9c2669
DQ		 3720 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3721
a8a5da99 3722 sattr->ia_mode &= ~current_umask();
1da177e4 3723 do {
078ea3df
TM		 3724 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3725 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3726 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3727 &exception);
3728 } while (exception.retry);
aa9c2669
DQ		 3729 nfs4_label_release_security(label);
3730
1da177e4
LT		 3731 return err;
3732}
3733
3734static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3735 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3736{
3737 struct inode *dir = dentry->d_inode;
3738 struct nfs4_readdir_arg args = {
3739 .fh = NFS_FH(dir),
56e4ebf8 3740 .pages = pages,
1da177e4
LT		 3741 .pgbase = 0,
3742 .count = count,
96d25e53 3743 .bitmask = NFS_SERVER(dentry->d_inode)->attr_bitmask,
82f2e547 3744 .plus = plus,
1da177e4
LT		 3745 };
3746 struct nfs4_readdir_res res;
3747 struct rpc_message msg = {
3748 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3749 .rpc_argp = &args,
3750 .rpc_resp = &res,
3751 .rpc_cred = cred,
3752 };
3753 int status;
3754
3110ff80 3755 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__,
eadf4598
TM		 3756 dentry->d_parent->d_name.name,
3757 dentry->d_name.name,
3758 (unsigned long long)cookie);
c3f52af3 3759 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3760 res.pgbase = args.pgbase;
7c513058 3761 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3762 if (status >= 0) {
c3f52af3 3763 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3764 status += args.pgbase;
3765 }
c4812998
TM		 3766
3767 nfs_invalidate_atime(dir);
3768
3110ff80 3769 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3770 return status;
3771}
3772
3773static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3774 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3775{
3776 struct nfs4_exception exception = { };
3777 int err;
3778 do {
c1578b76
TM		 3779 err = _nfs4_proc_readdir(dentry, cred, cookie,
3780 pages, count, plus);
3781 trace_nfs4_readdir(dentry->d_inode, err);
3782 err = nfs4_handle_exception(NFS_SERVER(dentry->d_inode), err,
1da177e4
LT		 3783 &exception);
3784 } while (exception.retry);
3785 return err;
3786}
3787
3788static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3789 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3790{
57dc9a57
TM		 3791 struct nfs4_createdata *data;
3792 int mode = sattr->ia_mode;
3793 int status = -ENOMEM;
1da177e4 3794
57dc9a57
TM		 3795 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3796 if (data == NULL)
3797 goto out;
3798
1da177e4 3799 if (S_ISFIFO(mode))
57dc9a57 3800 data->arg.ftype = NF4FIFO;
1da177e4 3801 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3802 data->arg.ftype = NF4BLK;
3803 data->arg.u.device.specdata1 = MAJOR(rdev);
3804 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3805 }
3806 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3807 data->arg.ftype = NF4CHR;
3808 data->arg.u.device.specdata1 = MAJOR(rdev);
3809 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3810 } else if (!S_ISSOCK(mode)) {
3811 status = -EINVAL;
3812 goto out_free;
1da177e4 3813 }
1775fd3e 3814
aa9c2669 3815 data->arg.label = label;
57dc9a57 3816 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3817out_free:
57dc9a57
TM		 3818 nfs4_free_createdata(data);
3819out:
1da177e4
LT		 3820 return status;
3821}
3822
3823static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3824 struct iattr *sattr, dev_t rdev)
3825{
3826 struct nfs4_exception exception = { };
aa9c2669 3827 struct nfs4_label l, *label = NULL;
1da177e4 3828 int err;
a8a5da99 3829
aa9c2669
DQ		 3830 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3831
a8a5da99 3832 sattr->ia_mode &= ~current_umask();
1da177e4 3833 do {
078ea3df
TM		 3834 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3835 trace_nfs4_mknod(dir, &dentry->d_name, err);
3836 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3837 &exception);
3838 } while (exception.retry);
aa9c2669
DQ		 3839
3840 nfs4_label_release_security(label);
3841
1da177e4
LT		 3842 return err;
3843}
3844
3845static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3846 struct nfs_fsstat *fsstat)
3847{
3848 struct nfs4_statfs_arg args = {
3849 .fh = fhandle,
3850 .bitmask = server->attr_bitmask,
3851 };
24ad148a
BH		 3852 struct nfs4_statfs_res res = {
3853 .fsstat = fsstat,
3854 };
1da177e4
LT		 3855 struct rpc_message msg = {
3856 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
3857 .rpc_argp = &args,
24ad148a 3858 .rpc_resp = &res,
1da177e4
LT		 3859 };
3860
0e574af1 3861 nfs_fattr_init(fsstat->fattr);
7c513058 3862 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3863}
3864
3865static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
3866{
3867 struct nfs4_exception exception = { };
3868 int err;
3869 do {
3870 err = nfs4_handle_exception(server,
3871 _nfs4_proc_statfs(server, fhandle, fsstat),
3872 &exception);
3873 } while (exception.retry);
3874 return err;
3875}
3876
3877static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
3878 struct nfs_fsinfo *fsinfo)
3879{
3880 struct nfs4_fsinfo_arg args = {
3881 .fh = fhandle,
3882 .bitmask = server->attr_bitmask,
3883 };
3dda5e43
BH		 3884 struct nfs4_fsinfo_res res = {
3885 .fsinfo = fsinfo,
3886 };
1da177e4
LT		 3887 struct rpc_message msg = {
3888 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
3889 .rpc_argp = &args,
3dda5e43 3890 .rpc_resp = &res,
1da177e4
LT		 3891 };
3892
7c513058 3893 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3894}
3895
3896static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3897{
3898 struct nfs4_exception exception = { };
83ca7f5a 3899 unsigned long now = jiffies;
1da177e4
LT		 3900 int err;
3901
3902 do {
83ca7f5a 3903 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 3904 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 3905 if (err == 0) {
3906 struct nfs_client *clp = server->nfs_client;
3907
3908 spin_lock(&clp->cl_lock);
3909 clp->cl_lease_time = fsinfo->lease_time * HZ;
3910 clp->cl_last_renewal = now;
3911 spin_unlock(&clp->cl_lock);
3912 break;
3913 }
3914 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 3915 } while (exception.retry);
3916 return err;
3917}
3918
3919static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
3920{
e38eb650
BS		 3921 int error;
3922
0e574af1 3923 nfs_fattr_init(fsinfo->fattr);
e38eb650 3924 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 3925 if (error == 0) {
3926 /* block layout checks this! */
3927 server->pnfs_blksize = fsinfo->blksize;
e38eb650 3928 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 3929 }
e38eb650
BS		 3930
3931 return error;
1da177e4
LT		 3932}
3933
3934static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3935 struct nfs_pathconf *pathconf)
3936{
3937 struct nfs4_pathconf_arg args = {
3938 .fh = fhandle,
3939 .bitmask = server->attr_bitmask,
3940 };
d45b2989
BH		 3941 struct nfs4_pathconf_res res = {
3942 .pathconf = pathconf,
3943 };
1da177e4
LT		 3944 struct rpc_message msg = {
3945 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
3946 .rpc_argp = &args,
d45b2989 3947 .rpc_resp = &res,
1da177e4
LT		 3948 };
3949
3950 /* None of the pathconf attributes are mandatory to implement */
3951 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
3952 memset(pathconf, 0, sizeof(*pathconf));
3953 return 0;
3954 }
3955
0e574af1 3956 nfs_fattr_init(pathconf->fattr);
7c513058 3957 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3958}
3959
3960static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
3961 struct nfs_pathconf *pathconf)
3962{
3963 struct nfs4_exception exception = { };
3964 int err;
3965
3966 do {
3967 err = nfs4_handle_exception(server,
3968 _nfs4_proc_pathconf(server, fhandle, pathconf),
3969 &exception);
3970 } while (exception.retry);
3971 return err;
3972}
3973
5521abfd 3974int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 3975 const struct nfs_open_context *ctx,
3976 const struct nfs_lock_context *l_ctx,
3977 fmode_t fmode)
3978{
3979 const struct nfs_lockowner *lockowner = NULL;
3980
3981 if (l_ctx != NULL)
3982 lockowner = &l_ctx->lockowner;
5521abfd 3983 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 3984}
3985EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
3986
5521abfd
TM		 3987static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
3988 const struct nfs_open_context *ctx,
3989 const struct nfs_lock_context *l_ctx,
3990 fmode_t fmode)
3991{
3992 nfs4_stateid current_stateid;
3993
3994 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode))
3995 return false;
3996 return nfs4_stateid_match(stateid, &current_stateid);
3997}
3998
3999static bool nfs4_error_stateid_expired(int err)
4000{
4001 switch (err) {
4002 case -NFS4ERR_DELEG_REVOKED:
4003 case -NFS4ERR_ADMIN_REVOKED:
4004 case -NFS4ERR_BAD_STATEID:
4005 case -NFS4ERR_STALE_STATEID:
4006 case -NFS4ERR_OLD_STATEID:
4007 case -NFS4ERR_OPENMODE:
4008 case -NFS4ERR_EXPIRED:
4009 return true;
4010 }
4011 return false;
4012}
4013
d20581aa
BH		 4014void __nfs4_read_done_cb(struct nfs_read_data *data)
4015{
cd841605 4016 nfs_invalidate_atime(data->header->inode);
d20581aa
BH		 4017}
4018
cbdabc7f 4019static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_read_data *data)
1da177e4 4020{
cd841605 4021 struct nfs_server *server = NFS_SERVER(data->header->inode);
1da177e4 4022
cc668ab3 4023 trace_nfs4_read(data, task->tk_status);
9e33bed5 4024 if (nfs4_async_handle_error(task, server, data->args.context->state) == -EAGAIN) {
d00c5d43 4025 rpc_restart_call_prepare(task);
ec06c096 4026 return -EAGAIN;
1da177e4 4027 }
8850df99 4028
d20581aa 4029 __nfs4_read_done_cb(data);
1da177e4 4030 if (task->tk_status > 0)
ec06c096
TM		 4031 renew_lease(server, data->timestamp);
4032 return 0;
1da177e4
LT		 4033}
4034
5521abfd
TM		 4035static bool nfs4_read_stateid_changed(struct rpc_task *task,
4036 struct nfs_readargs *args)
4037{
4038
4039 if (!nfs4_error_stateid_expired(task->tk_status) ||
4040 nfs4_stateid_is_current(&args->stateid,
4041 args->context,
4042 args->lock_context,
4043 FMODE_READ))
4044 return false;
4045 rpc_restart_call_prepare(task);
4046 return true;
4047}
4048
cbdabc7f
AA		 4049static int nfs4_read_done(struct rpc_task *task, struct nfs_read_data *data)
4050{
4051
4052 dprintk("--> %s\n", __func__);
4053
4054 if (!nfs4_sequence_done(task, &data->res.seq_res))
4055 return -EAGAIN;
5521abfd
TM		 4056 if (nfs4_read_stateid_changed(task, &data->args))
4057 return -EAGAIN;
d20581aa
BH		 4058 return data->read_done_cb ? data->read_done_cb(task, data) :
4059 nfs4_read_done_cb(task, data);
cbdabc7f
AA		 4060}
4061
bdc7f021 4062static void nfs4_proc_read_setup(struct nfs_read_data *data, struct rpc_message *msg)
1da177e4 4063{
1da177e4 4064 data->timestamp = jiffies;
cbdabc7f 4065 data->read_done_cb = nfs4_read_done_cb;
bdc7f021 4066 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
a9c92d6b 4067 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
1da177e4
LT		 4068}
4069
ef1820f9 4070static int nfs4_proc_read_rpc_prepare(struct rpc_task *task, struct nfs_read_data *data)
ea7c3303 4071{
9b206149 4072 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 4073 &data->args.seq_args,
4074 &data->res.seq_res,
9b206149 4075 task))
ef1820f9
N		 4076 return 0;
4077 if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4078 data->args.lock_context, FMODE_READ) == -EIO)
4079 return -EIO;
4080 if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags)))
4081 return -EIO;
4082 return 0;
1da177e4
LT		 4083}
4084
b029bc9b 4085static int nfs4_write_done_cb(struct rpc_task *task, struct nfs_write_data *data)
1da177e4 4086{
cd841605 4087 struct inode *inode = data->header->inode;
1da177e4 4088
cc668ab3 4089 trace_nfs4_write(data, task->tk_status);
9e33bed5 4090 if (nfs4_async_handle_error(task, NFS_SERVER(inode), data->args.context->state) == -EAGAIN) {
d00c5d43 4091 rpc_restart_call_prepare(task);
788e7a89 4092 return -EAGAIN;
1da177e4 4093 }
4f9838c7 4094 if (task->tk_status >= 0) {
1da177e4 4095 renew_lease(NFS_SERVER(inode), data->timestamp);
5a37f851 4096 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
4f9838c7 4097 }
788e7a89 4098 return 0;
1da177e4
LT		 4099}
4100
5521abfd
TM		 4101static bool nfs4_write_stateid_changed(struct rpc_task *task,
4102 struct nfs_writeargs *args)
4103{
4104
4105 if (!nfs4_error_stateid_expired(task->tk_status) ||
4106 nfs4_stateid_is_current(&args->stateid,
4107 args->context,
4108 args->lock_context,
4109 FMODE_WRITE))
4110 return false;
4111 rpc_restart_call_prepare(task);
4112 return true;
4113}
4114
b029bc9b
FI		 4115static int nfs4_write_done(struct rpc_task *task, struct nfs_write_data *data)
4116{
4117 if (!nfs4_sequence_done(task, &data->res.seq_res))
4118 return -EAGAIN;
5521abfd
TM		 4119 if (nfs4_write_stateid_changed(task, &data->args))
4120 return -EAGAIN;
d20581aa
BH		 4121 return data->write_done_cb ? data->write_done_cb(task, data) :
4122 nfs4_write_done_cb(task, data);
b029bc9b
FI		 4123}
4124
5a37f851
TM		 4125static
4126bool nfs4_write_need_cache_consistency_data(const struct nfs_write_data *data)
a69aef14 4127{
5a37f851
TM		 4128 const struct nfs_pgio_header *hdr = data->header;
4129
4130 /* Don't request attributes for pNFS or O_DIRECT writes */
4131 if (data->ds_clp != NULL || hdr->dreq != NULL)
4132 return false;
4133 /* Otherwise, request attributes if and only if we don't hold
4134 * a delegation
4135 */
011e2a7f 4136 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4137}
a69aef14 4138
bdc7f021 4139static void nfs4_proc_write_setup(struct nfs_write_data *data, struct rpc_message *msg)
1da177e4 4140{
cd841605 4141 struct nfs_server *server = NFS_SERVER(data->header->inode);
bdc7f021 4142
5a37f851 4143 if (!nfs4_write_need_cache_consistency_data(data)) {
7ffd1064
FI		 4144 data->args.bitmask = NULL;
4145 data->res.fattr = NULL;
4146 } else
4147 data->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4148
b029bc9b
FI		 4149 if (!data->write_done_cb)
4150 data->write_done_cb = nfs4_write_done_cb;
4f9838c7 4151 data->res.server = server;
1da177e4
LT		 4152 data->timestamp = jiffies;
4153
bdc7f021 4154 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
a9c92d6b 4155 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4156}
4157
ef1820f9 4158static int nfs4_proc_write_rpc_prepare(struct rpc_task *task, struct nfs_write_data *data)
c6cb80d0 4159{
9b206149 4160 if (nfs4_setup_sequence(NFS_SERVER(data->header->inode),
d9afbd1b
TM		 4161 &data->args.seq_args,
4162 &data->res.seq_res,
9b206149 4163 task))
ef1820f9
N		 4164 return 0;
4165 if (nfs4_set_rw_stateid(&data->args.stateid, data->args.context,
4166 data->args.lock_context, FMODE_WRITE) == -EIO)
4167 return -EIO;
4168 if (unlikely(test_bit(NFS_CONTEXT_BAD, &data->args.context->flags)))
4169 return -EIO;
4170 return 0;
1da177e4
LT		 4171}
4172
0b7c0153 4173static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4174{
d9afbd1b
TM		 4175 nfs4_setup_sequence(NFS_SERVER(data->inode),
4176 &data->args.seq_args,
4177 &data->res.seq_res,
4178 task);
1da177e4
LT		 4179}
4180
0b7c0153 4181static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4182{
1da177e4 4183 struct inode *inode = data->inode;
14516c3a 4184
cc668ab3 4185 trace_nfs4_commit(data, task->tk_status);
9e33bed5 4186 if (nfs4_async_handle_error(task, NFS_SERVER(inode), NULL) == -EAGAIN) {
d00c5d43 4187 rpc_restart_call_prepare(task);
788e7a89 4188 return -EAGAIN;
1da177e4 4189 }
788e7a89 4190 return 0;
1da177e4
LT		 4191}
4192
0b7c0153 4193static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4194{
4195 if (!nfs4_sequence_done(task, &data->res.seq_res))
4196 return -EAGAIN;
0b7c0153 4197 return data->commit_done_cb(task, data);
5f452431
FI		 4198}
4199
0b7c0153 4200static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4201{
788e7a89 4202 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4203
0b7c0153
FI		 4204 if (data->commit_done_cb == NULL)
4205 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4206 data->res.server = server;
bdc7f021 4207 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4208 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4209}
4210
9bc4e3ca
CL		 4211struct nfs4_renewdata {
4212 struct nfs_client *client;
4213 unsigned long timestamp;
4214};
4215
1da177e4
LT		 4216/*
4217 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4218 * standalone procedure for queueing an asynchronous RENEW.
4219 */
9bc4e3ca 4220static void nfs4_renew_release(void *calldata)
dc96aef9 4221{
9bc4e3ca
CL		 4222 struct nfs4_renewdata *data = calldata;
4223 struct nfs_client *clp = data->client;
dc96aef9 4224
0851de06
AB		 4225 if (atomic_read(&clp->cl_count) > 1)
4226 nfs4_schedule_state_renewal(clp);
4227 nfs_put_client(clp);
9bc4e3ca 4228 kfree(data);
dc96aef9
AB		 4229}
4230
9bc4e3ca 4231static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4232{
9bc4e3ca
CL		 4233 struct nfs4_renewdata *data = calldata;
4234 struct nfs_client *clp = data->client;
4235 unsigned long timestamp = data->timestamp;
1da177e4 4236
c6d01c6f 4237 trace_nfs4_renew_async(clp, task->tk_status);
1da177e4 4238 if (task->tk_status < 0) {
95baa25c 4239 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4240 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4241 return;
4242 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4243 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4244 return;
4245 }
4246 nfs4_schedule_path_down_recovery(clp);
1da177e4 4247 }
452e9352 4248 do_renew_lease(clp, timestamp);
1da177e4
LT		 4249}
4250
963d8fe5
TM		 4251static const struct rpc_call_ops nfs4_renew_ops = {
4252 .rpc_call_done = nfs4_renew_done,
dc96aef9 4253 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4254};
4255
2f60ea6b 4256static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4257{
4258 struct rpc_message msg = {
4259 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4260 .rpc_argp = clp,
b4454fe1 4261 .rpc_cred = cred,
1da177e4 4262 };
9bc4e3ca 4263 struct nfs4_renewdata *data;
1da177e4 4264
2f60ea6b
TM		 4265 if (renew_flags == 0)
4266 return 0;
0851de06
AB		 4267 if (!atomic_inc_not_zero(&clp->cl_count))
4268 return -EIO;
b569ad34 4269 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4270 if (data == NULL)
4271 return -ENOMEM;
4272 data->client = clp;
4273 data->timestamp = jiffies;
bc7a05ca 4274 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4275 &nfs4_renew_ops, data);
1da177e4
LT		 4276}
4277
8534d4ec 4278static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4279{
4280 struct rpc_message msg = {
4281 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4282 .rpc_argp = clp,
b4454fe1 4283 .rpc_cred = cred,
1da177e4
LT		 4284 };
4285 unsigned long now = jiffies;
4286 int status;
4287
bc7a05ca 4288 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4289 if (status < 0)
4290 return status;
452e9352 4291 do_renew_lease(clp, now);
1da177e4
LT		 4292 return 0;
4293}
4294
aa1870af
BF		 4295static inline int nfs4_server_supports_acls(struct nfs_server *server)
4296{
4297 return (server->caps & NFS_CAP_ACLS)
4298 && (server->acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
4299 && (server->acl_bitmask & ACL4_SUPPORT_DENY_ACL);
4300}
4301
21f498c2
TM		 4302/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4303 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4304 * the stack.
4305 */
21f498c2 4306#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4307
e9e3d724
NH		 4308static int buf_to_pages_noslab(const void *buf, size_t buflen,
4309 struct page **pages, unsigned int *pgbase)
4310{
4311 struct page *newpage, **spages;
4312 int rc = 0;
4313 size_t len;
4314 spages = pages;
4315
4316 do {
21f498c2 4317 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4318 newpage = alloc_page(GFP_KERNEL);
4319
4320 if (newpage == NULL)
4321 goto unwind;
4322 memcpy(page_address(newpage), buf, len);
4323 buf += len;
4324 buflen -= len;
4325 *pages++ = newpage;
4326 rc++;
4327 } while (buflen != 0);
4328
4329 return rc;
4330
4331unwind:
4332 for(; rc > 0; rc--)
4333 __free_page(spages[rc-1]);
4334 return -ENOMEM;
4335}
4336
e50a1c2e
BF		 4337struct nfs4_cached_acl {
4338 int cached;
4339 size_t len;
3e9d4154 4340 char data[0];
e50a1c2e
BF		 4341};
4342
4343static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4344{
4345 struct nfs_inode *nfsi = NFS_I(inode);
4346
4347 spin_lock(&inode->i_lock);
4348 kfree(nfsi->nfs4_acl);
4349 nfsi->nfs4_acl = acl;
4350 spin_unlock(&inode->i_lock);
4351}
4352
4353static void nfs4_zap_acl_attr(struct inode *inode)
4354{
4355 nfs4_set_cached_acl(inode, NULL);
4356}
4357
4358static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4359{
4360 struct nfs_inode *nfsi = NFS_I(inode);
4361 struct nfs4_cached_acl *acl;
4362 int ret = -ENOENT;
4363
4364 spin_lock(&inode->i_lock);
4365 acl = nfsi->nfs4_acl;
4366 if (acl == NULL)
4367 goto out;
4368 if (buf == NULL) /* user is just asking for length */
4369 goto out_len;
4370 if (acl->cached == 0)
4371 goto out;
4372 ret = -ERANGE; /* see getxattr(2) man page */
4373 if (acl->len > buflen)
4374 goto out;
4375 memcpy(buf, acl->data, acl->len);
4376out_len:
4377 ret = acl->len;
4378out:
4379 spin_unlock(&inode->i_lock);
4380 return ret;
4381}
4382
5794d21e 4383static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4384{
4385 struct nfs4_cached_acl *acl;
b291f1b1 4386 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4387
1f1ea6c2 4388 if (buflen <= PAGE_SIZE) {
b291f1b1 4389 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4390 if (acl == NULL)
4391 goto out;
4392 acl->cached = 1;
5794d21e 4393 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4394 } else {
4395 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4396 if (acl == NULL)
4397 goto out;
4398 acl->cached = 0;
4399 }
4400 acl->len = acl_len;
4401out:
4402 nfs4_set_cached_acl(inode, acl);
4403}
4404
bf118a34
AA		 4405/*
4406 * The getxattr API returns the required buffer length when called with a
4407 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4408 * the required buf. On a NULL buf, we send a page of data to the server
4409 * guessing that the ACL request can be serviced by a page. If so, we cache
4410 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4411 * the cache. If not so, we throw away the page, and cache the required
4412 * length. The next getxattr call will then produce another round trip to
4413 * the server, this time with the input buf of the required size.
4414 */
16b4289c 4415static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4416{
bf118a34 4417 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4418 struct nfs_getaclargs args = {
4419 .fh = NFS_FH(inode),
4420 .acl_pages = pages,
4421 .acl_len = buflen,
4422 };
663c79b3
BH		 4423 struct nfs_getaclres res = {
4424 .acl_len = buflen,
4425 };
aa1870af
BF		 4426 struct rpc_message msg = {
4427 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4428 .rpc_argp = &args,
663c79b3 4429 .rpc_resp = &res,
aa1870af 4430 };
21f498c2
TM		 4431 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4432 int ret = -ENOMEM, i;
aa1870af 4433
bf118a34
AA		 4434 /* As long as we're doing a round trip to the server anyway,
4435 * let's be prepared for a page of acl data. */
4436 if (npages == 0)
4437 npages = 1;
21f498c2
TM		 4438 if (npages > ARRAY_SIZE(pages))
4439 return -ERANGE;
5a006899 4440
bf118a34
AA		 4441 for (i = 0; i < npages; i++) {
4442 pages[i] = alloc_page(GFP_KERNEL);
4443 if (!pages[i])
4444 goto out_free;
e50a1c2e 4445 }
5a006899
SP		 4446
4447 /* for decoding across pages */
4448 res.acl_scratch = alloc_page(GFP_KERNEL);
4449 if (!res.acl_scratch)
4450 goto out_free;
4451
bf118a34
AA		 4452 args.acl_len = npages * PAGE_SIZE;
4453 args.acl_pgbase = 0;
5a006899 4454
de040bec 4455 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4456 __func__, buf, buflen, npages, args.acl_len);
4457 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4458 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4459 if (ret)
4460 goto out_free;
bf118a34 4461
1f1ea6c2
TM		 4462 /* Handle the case where the passed-in buffer is too short */
4463 if (res.acl_flags & NFS4_ACL_TRUNC) {
4464 /* Did the user only issue a request for the acl length? */
4465 if (buf == NULL)
4466 goto out_ok;
e50a1c2e 4467 ret = -ERANGE;
1f1ea6c2 4468 goto out_free;
e50a1c2e 4469 }
1f1ea6c2 4470 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4471 if (buf) {
4472 if (res.acl_len > buflen) {
4473 ret = -ERANGE;
4474 goto out_free;
4475 }
1f1ea6c2 4476 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4477 }
1f1ea6c2
TM		 4478out_ok:
4479 ret = res.acl_len;
e50a1c2e 4480out_free:
bf118a34
AA		 4481 for (i = 0; i < npages; i++)
4482 if (pages[i])
4483 __free_page(pages[i]);
331818f1
TM		 4484 if (res.acl_scratch)
4485 __free_page(res.acl_scratch);
aa1870af
BF		 4486 return ret;
4487}
4488
16b4289c
TM		 4489static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4490{
4491 struct nfs4_exception exception = { };
4492 ssize_t ret;
4493 do {
4494 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4495 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4496 if (ret >= 0)
4497 break;
4498 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4499 } while (exception.retry);
4500 return ret;
4501}
4502
e50a1c2e
BF		 4503static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4504{
4505 struct nfs_server *server = NFS_SERVER(inode);
4506 int ret;
4507
4508 if (!nfs4_server_supports_acls(server))
4509 return -EOPNOTSUPP;
4510 ret = nfs_revalidate_inode(server, inode);
4511 if (ret < 0)
4512 return ret;
08a22b39
AK		 4513 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4514 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4515 ret = nfs4_read_cached_acl(inode, buf, buflen);
4516 if (ret != -ENOENT)
bf118a34
AA		 4517 /* -ENOENT is returned if there is no ACL or if there is an ACL
4518 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4519 return ret;
4520 return nfs4_get_acl_uncached(inode, buf, buflen);
4521}
4522
16b4289c 4523static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4524{
4525 struct nfs_server *server = NFS_SERVER(inode);
4526 struct page *pages[NFS4ACL_MAXPAGES];
4527 struct nfs_setaclargs arg = {
4528 .fh = NFS_FH(inode),
4529 .acl_pages = pages,
4530 .acl_len = buflen,
4531 };
73c403a9 4532 struct nfs_setaclres res;
4b580ee3
BF		 4533 struct rpc_message msg = {
4534 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4535 .rpc_argp = &arg,
73c403a9 4536 .rpc_resp = &res,
4b580ee3 4537 };
21f498c2 4538 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4539 int ret, i;
4b580ee3
BF		 4540
4541 if (!nfs4_server_supports_acls(server))
4542 return -EOPNOTSUPP;
21f498c2
TM		 4543 if (npages > ARRAY_SIZE(pages))
4544 return -ERANGE;
e9e3d724
NH		 4545 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4546 if (i < 0)
4547 return i;
57ec14c5 4548 nfs4_inode_return_delegation(inode);
7c513058 4549 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4550
4551 /*
4552 * Free each page after tx, so the only ref left is
4553 * held by the network stack
4554 */
4555 for (; i > 0; i--)
4556 put_page(pages[i-1]);
4557
08a22b39
AK		 4558 /*
4559 * Acl update can result in inode attribute update.
4560 * so mark the attribute cache invalid.
4561 */
4562 spin_lock(&inode->i_lock);
4563 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4564 spin_unlock(&inode->i_lock);
f41f7418
TM		 4565 nfs_access_zap_cache(inode);
4566 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4567 return ret;
4568}
4569
16b4289c
TM		 4570static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4571{
4572 struct nfs4_exception exception = { };
4573 int err;
4574 do {
c1578b76
TM		 4575 err = __nfs4_proc_set_acl(inode, buf, buflen);
4576 trace_nfs4_set_acl(inode, err);
4577 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4578 &exception);
4579 } while (exception.retry);
4580 return err;
4581}
4582
aa9c2669
DQ		 4583#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4584static int _nfs4_get_security_label(struct inode *inode, void *buf,
4585 size_t buflen)
4586{
4587 struct nfs_server *server = NFS_SERVER(inode);
4588 struct nfs_fattr fattr;
4589 struct nfs4_label label = {0, 0, buflen, buf};
4590
4591 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4592 struct nfs4_getattr_arg args = {
4593 .fh = NFS_FH(inode),
4594 .bitmask = bitmask,
4595 };
4596 struct nfs4_getattr_res res = {
4597 .fattr = &fattr,
4598 .label = &label,
4599 .server = server,
4600 };
4601 struct rpc_message msg = {
4602 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
4603 .rpc_argp = &args,
4604 .rpc_resp = &res,
4605 };
4606 int ret;
4607
4608 nfs_fattr_init(&fattr);
4609
4610 ret = rpc_call_sync(server->client, &msg, 0);
4611 if (ret)
4612 return ret;
4613 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4614 return -ENOENT;
4615 if (buflen < label.len)
4616 return -ERANGE;
4617 return 0;
4618}
4619
4620static int nfs4_get_security_label(struct inode *inode, void *buf,
4621 size_t buflen)
4622{
4623 struct nfs4_exception exception = { };
4624 int err;
4625
4626 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4627 return -EOPNOTSUPP;
4628
4629 do {
c1578b76
TM		 4630 err = _nfs4_get_security_label(inode, buf, buflen);
4631 trace_nfs4_get_security_label(inode, err);
4632 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4633 &exception);
4634 } while (exception.retry);
4635 return err;
4636}
4637
4638static int _nfs4_do_set_security_label(struct inode *inode,
4639 struct nfs4_label *ilabel,
4640 struct nfs_fattr *fattr,
4641 struct nfs4_label *olabel)
4642{
4643
4644 struct iattr sattr = {0};
4645 struct nfs_server *server = NFS_SERVER(inode);
4646 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
4647 struct nfs_setattrargs args = {
4648 .fh = NFS_FH(inode),
4649 .iap = &sattr,
4650 .server = server,
4651 .bitmask = bitmask,
4652 .label = ilabel,
4653 };
4654 struct nfs_setattrres res = {
4655 .fattr = fattr,
4656 .label = olabel,
4657 .server = server,
4658 };
4659 struct rpc_message msg = {
4660 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
4661 .rpc_argp = &args,
4662 .rpc_resp = &res,
4663 };
4664 int status;
4665
4666 nfs4_stateid_copy(&args.stateid, &zero_stateid);
4667
4668 status = rpc_call_sync(server->client, &msg, 0);
4669 if (status)
4670 dprintk("%s failed: %d\n", __func__, status);
4671
4672 return status;
4673}
4674
4675static int nfs4_do_set_security_label(struct inode *inode,
4676 struct nfs4_label *ilabel,
4677 struct nfs_fattr *fattr,
4678 struct nfs4_label *olabel)
4679{
4680 struct nfs4_exception exception = { };
4681 int err;
4682
4683 do {
c1578b76
TM		 4684 err = _nfs4_do_set_security_label(inode, ilabel,
4685 fattr, olabel);
4686 trace_nfs4_set_security_label(inode, err);
4687 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4688 &exception);
4689 } while (exception.retry);
4690 return err;
4691}
4692
4693static int
4694nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4695{
4696 struct nfs4_label ilabel, *olabel = NULL;
4697 struct nfs_fattr fattr;
4698 struct rpc_cred *cred;
4699 struct inode *inode = dentry->d_inode;
4700 int status;
4701
4702 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4703 return -EOPNOTSUPP;
4704
4705 nfs_fattr_init(&fattr);
4706
4707 ilabel.pi = 0;
4708 ilabel.lfs = 0;
4709 ilabel.label = (char *)buf;
4710 ilabel.len = buflen;
4711
4712 cred = rpc_lookup_cred();
4713 if (IS_ERR(cred))
4714 return PTR_ERR(cred);
4715
4716 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4717 if (IS_ERR(olabel)) {
4718 status = -PTR_ERR(olabel);
4719 goto out;
4720 }
4721
4722 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4723 if (status == 0)
4724 nfs_setsecurity(inode, &fattr, olabel);
4725
4726 nfs4_label_free(olabel);
4727out:
4728 put_rpccred(cred);
4729 return status;
4730}
4731#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4732
4733
1da177e4 4734static int
aa5190d0 4735nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server, struct nfs4_state *state)
1da177e4 4736{
aa5190d0
TM		 4737 struct nfs_client *clp = server->nfs_client;
4738
4739 if (task->tk_status >= 0)
1da177e4
LT		 4740 return 0;
4741 switch(task->tk_status) {
a1d0b5ee 4742 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4743 case -NFS4ERR_ADMIN_REVOKED:
4744 case -NFS4ERR_BAD_STATEID:
14977489
TM		 4745 if (state == NULL)
4746 break;
4747 nfs_remove_bad_delegation(state->inode);
9e33bed5
TM		 4748 case -NFS4ERR_OPENMODE:
4749 if (state == NULL)
4750 break;
5d422301 4751 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4752 goto recovery_failed;
0400a6b0 4753 goto wait_on_recovery;
0ced63d1 4754 case -NFS4ERR_EXPIRED:
5d422301
TM		 4755 if (state != NULL) {
4756 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4757 goto recovery_failed;
5d422301 4758 }
1da177e4 4759 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4760 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4761 nfs4_schedule_lease_recovery(clp);
4762 goto wait_on_recovery;
519ae255
CL		 4763 case -NFS4ERR_MOVED:
4764 if (nfs4_schedule_migration_recovery(server) < 0)
4765 goto recovery_failed;
4766 goto wait_on_recovery;
8ef2f8d4
CL		 4767 case -NFS4ERR_LEASE_MOVED:
4768 nfs4_schedule_lease_moved_recovery(clp);
4769 goto wait_on_recovery;
4745e315
AA		 4770#if defined(CONFIG_NFS_V4_1)
4771 case -NFS4ERR_BADSESSION:
4772 case -NFS4ERR_BADSLOT:
4773 case -NFS4ERR_BAD_HIGH_SLOT:
4774 case -NFS4ERR_DEADSESSION:
4775 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4776 case -NFS4ERR_SEQ_FALSE_RETRY:
4777 case -NFS4ERR_SEQ_MISORDERED:
4778 dprintk("%s ERROR %d, Reset session\n", __func__,
4779 task->tk_status);
9f594791 4780 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
f1478c13 4781 goto restart_call;
4745e315 4782#endif /* CONFIG_NFS_V4_1 */
1da177e4 4783 case -NFS4ERR_DELAY:
aa5190d0 4784 nfs_inc_server_stats(server, NFSIOS_DELAY);
006ea73e 4785 case -NFS4ERR_GRACE:
1da177e4 4786 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4787 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4788 case -NFS4ERR_OLD_STATEID:
f1478c13 4789 goto restart_call;
1da177e4
LT		 4790 }
4791 task->tk_status = nfs4_map_errors(task->tk_status);
4792 return 0;
9f51a78e 4793recovery_failed:
5d422301
TM		 4794 task->tk_status = -EIO;
4795 return 0;
0400a6b0 4796wait_on_recovery:
a2c0b9e2 4797 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4798 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4799 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4800 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4801 goto recovery_failed;
f1478c13 4802restart_call:
a2c0b9e2
TM		 4803 task->tk_status = 0;
4804 return -EAGAIN;
1da177e4
LT		 4805}
4806
f092075d
CL		 4807static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4808 nfs4_verifier *bootverf)
cd93710e
CL		 4809{
4810 __be32 verf[2];
4811
2c820d9a
CL		 4812 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4813 /* An impossible timestamp guarantees this value
4814 * will never match a generated boot time. */
4815 verf[0] = 0;
17f26b12 4816 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4817 } else {
f092075d 4818 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4819 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4820 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4821 }
cd93710e
CL		 4822 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4823}
4824
e984a55a
CL		 4825static unsigned int
4826nfs4_init_nonuniform_client_string(const struct nfs_client *clp,
4827 char *buf, size_t len)
4828{
4829 unsigned int result;
4830
4831 rcu_read_lock();
4832 result = scnprintf(buf, len, "Linux NFSv4.0 %s/%s %s",
4833 clp->cl_ipaddr,
4834 rpc_peeraddr2str(clp->cl_rpcclient,
4835 RPC_DISPLAY_ADDR),
4836 rpc_peeraddr2str(clp->cl_rpcclient,
4837 RPC_DISPLAY_PROTO));
4838 rcu_read_unlock();
4839 return result;
4840}
4841
4842static unsigned int
4843nfs4_init_uniform_client_string(const struct nfs_client *clp,
4844 char *buf, size_t len)
4845{
55b59293 4846 const char *nodename = clp->cl_rpcclient->cl_nodename;
6f2ea7f2
CL		 4847
4848 if (nfs4_client_id_uniquifier[0] != '\0')
55b59293
TM		 4849 return scnprintf(buf, len, "Linux NFSv%u.%u %s/%s",
4850 clp->rpc_ops->version,
4851 clp->cl_minorversion,
4852 nfs4_client_id_uniquifier,
4853 nodename);
e984a55a
CL		 4854 return scnprintf(buf, len, "Linux NFSv%u.%u %s",
4855 clp->rpc_ops->version, clp->cl_minorversion,
6f2ea7f2 4856 nodename);
e984a55a
CL		 4857}
4858
6bbb4ae8
CL		 4859/**
4860 * nfs4_proc_setclientid - Negotiate client ID
4861 * @clp: state data structure
4862 * @program: RPC program for NFSv4 callback service
4863 * @port: IP port number for NFS4 callback service
4864 * @cred: RPC credential to use for this call
4865 * @res: where to place the result
4866 *
4867 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4868 */
bb8b27e5
TM		 4869int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
4870 unsigned short port, struct rpc_cred *cred,
4871 struct nfs4_setclientid_res *res)
1da177e4
LT		 4872{
4873 nfs4_verifier sc_verifier;
4874 struct nfs4_setclientid setclientid = {
4875 .sc_verifier = &sc_verifier,
4876 .sc_prog = program,
f4eecd5d 4877 .sc_cb_ident = clp->cl_cb_ident,
1da177e4
LT		 4878 };
4879 struct rpc_message msg = {
4880 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
4881 .rpc_argp = &setclientid,
bb8b27e5 4882 .rpc_resp = res,
286d7d6a 4883 .rpc_cred = cred,
1da177e4 4884 };
6bbb4ae8 4885 int status;
1da177e4 4886
de734831 4887 /* nfs_client_id4 */
f092075d 4888 nfs4_init_boot_verifier(clp, &sc_verifier);
e984a55a
CL		 4889 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
4890 setclientid.sc_name_len =
4891 nfs4_init_uniform_client_string(clp,
4892 setclientid.sc_name,
4893 sizeof(setclientid.sc_name));
4894 else
4895 setclientid.sc_name_len =
4896 nfs4_init_nonuniform_client_string(clp,
4897 setclientid.sc_name,
4898 sizeof(setclientid.sc_name));
de734831 4899 /* cb_client4 */
e984a55a 4900 rcu_read_lock();
de734831 4901 setclientid.sc_netid_len = scnprintf(setclientid.sc_netid,
fe2d5395 4902 sizeof(setclientid.sc_netid), "%s",
d4d3c507
CL		 4903 rpc_peeraddr2str(clp->cl_rpcclient,
4904 RPC_DISPLAY_NETID));
de734831
CL		 4905 rcu_read_unlock();
4906 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 4907 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 4908 clp->cl_ipaddr, port >> 8, port & 255);
4909
6bbb4ae8
CL		 4910 dprintk("NFS call setclientid auth=%s, '%.*s'\n",
4911 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4912 setclientid.sc_name_len, setclientid.sc_name);
4913 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4914 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 4915 dprintk("NFS reply setclientid: %d\n", status);
4916 return status;
1da177e4
LT		 4917}
4918
6bbb4ae8
CL		 4919/**
4920 * nfs4_proc_setclientid_confirm - Confirm client ID
4921 * @clp: state data structure
4922 * @res: result of a previous SETCLIENTID
4923 * @cred: RPC credential to use for this call
4924 *
4925 * Returns zero, a negative errno, or a negative NFS4ERR status code.
4926 */
fd954ae1 4927int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 4928 struct nfs4_setclientid_res *arg,
4929 struct rpc_cred *cred)
1da177e4 4930{
1da177e4
LT		 4931 struct rpc_message msg = {
4932 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 4933 .rpc_argp = arg,
286d7d6a 4934 .rpc_cred = cred,
1da177e4 4935 };
1da177e4
LT		 4936 int status;
4937
6bbb4ae8
CL		 4938 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
4939 clp->cl_rpcclient->cl_auth->au_ops->au_name,
4940 clp->cl_clientid);
1bd714f2 4941 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 4942 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 4943 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 4944 return status;
4945}
4946
fe650407
TM		 4947struct nfs4_delegreturndata {
4948 struct nfs4_delegreturnargs args;
fa178f29 4949 struct nfs4_delegreturnres res;
fe650407
TM		 4950 struct nfs_fh fh;
4951 nfs4_stateid stateid;
26e976a8 4952 unsigned long timestamp;
fa178f29 4953 struct nfs_fattr fattr;
fe650407
TM		 4954 int rpc_status;
4955};
4956
fe650407
TM		 4957static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
4958{
4959 struct nfs4_delegreturndata *data = calldata;
938e1010 4960
14516c3a
TM		 4961 if (!nfs4_sequence_done(task, &data->res.seq_res))
4962 return;
938e1010 4963
ca8acf8d 4964 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861
RL		 4965 switch (task->tk_status) {
4966 case -NFS4ERR_STALE_STATEID:
4967 case -NFS4ERR_EXPIRED:
4968 case 0:
fa178f29 4969 renew_lease(data->res.server, data->timestamp);
79708861
RL		 4970 break;
4971 default:
4972 if (nfs4_async_handle_error(task, data->res.server, NULL) ==
4973 -EAGAIN) {
d00c5d43 4974 rpc_restart_call_prepare(task);
79708861
RL		 4975 return;
4976 }
4977 }
4978 data->rpc_status = task->tk_status;
fe650407
TM		 4979}
4980
4981static void nfs4_delegreturn_release(void *calldata)
4982{
fe650407
TM		 4983 kfree(calldata);
4984}
4985
938e1010
AA		 4986static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
4987{
4988 struct nfs4_delegreturndata *d_data;
4989
4990 d_data = (struct nfs4_delegreturndata *)data;
4991
d9afbd1b
TM		 4992 nfs4_setup_sequence(d_data->res.server,
4993 &d_data->args.seq_args,
4994 &d_data->res.seq_res,
4995 task);
938e1010 4996}
938e1010 4997
c8d149f3 4998static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 4999 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5000 .rpc_call_done = nfs4_delegreturn_done,
5001 .rpc_release = nfs4_delegreturn_release,
5002};
5003
e6f81075 5004static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5005{
5006 struct nfs4_delegreturndata *data;
fa178f29 5007 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5008 struct rpc_task *task;
5138fde0
TM		 5009 struct rpc_message msg = {
5010 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5011 .rpc_cred = cred,
5012 };
c970aa85
TM		 5013 struct rpc_task_setup task_setup_data = {
5014 .rpc_client = server->client,
5138fde0 5015 .rpc_message = &msg,
c970aa85
TM		 5016 .callback_ops = &nfs4_delegreturn_ops,
5017 .flags = RPC_TASK_ASYNC,
5018 };
e6f81075 5019 int status = 0;
fe650407 5020
8535b2be 5021 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5022 if (data == NULL)
5023 return -ENOMEM;
a9c92d6b 5024 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5025 data->args.fhandle = &data->fh;
5026 data->args.stateid = &data->stateid;
9e907fec 5027 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5028 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5029 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5030 data->res.fattr = &data->fattr;
5031 data->res.server = server;
5138fde0 5032 nfs_fattr_init(data->res.fattr);
26e976a8 5033 data->timestamp = jiffies;
fe650407
TM		 5034 data->rpc_status = 0;
5035
c970aa85 5036 task_setup_data.callback_data = data;
1174dd1f
TM		 5037 msg.rpc_argp = &data->args;
5038 msg.rpc_resp = &data->res;
c970aa85 5039 task = rpc_run_task(&task_setup_data);
7a1218a2 5040 if (IS_ERR(task))
fe650407 5041 return PTR_ERR(task);
e6f81075
TM		 5042 if (!issync)
5043 goto out;
fe650407 5044 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5045 if (status != 0)
5046 goto out;
5047 status = data->rpc_status;
e144cbcc
TM		 5048 if (status == 0)
5049 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5050 else
5051 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5052out:
e6b3c4db 5053 rpc_put_task(task);
fe650407 5054 return status;
1da177e4
LT		 5055}
5056
e6f81075 5057int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5058{
5059 struct nfs_server *server = NFS_SERVER(inode);
5060 struct nfs4_exception exception = { };
5061 int err;
5062 do {
e6f81075 5063 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5064 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5065 switch (err) {
5066 case -NFS4ERR_STALE_STATEID:
5067 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5068 case 0:
5069 return 0;
5070 }
5071 err = nfs4_handle_exception(server, err, &exception);
5072 } while (exception.retry);
5073 return err;
5074}
5075
5076#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5077#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5078
5079/*
5080 * sleep, with exponential backoff, and retry the LOCK operation.
5081 */
5082static unsigned long
5083nfs4_set_lock_task_retry(unsigned long timeout)
5084{
416ad3c9 5085 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5086 timeout <<= 1;
5087 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5088 return NFS4_LOCK_MAXTIMEOUT;
5089 return timeout;
5090}
5091
1da177e4
LT		 5092static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5093{
5094 struct inode *inode = state->inode;
5095 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5096 struct nfs_client *clp = server->nfs_client;
911d1aaf 5097 struct nfs_lockt_args arg = {
1da177e4 5098 .fh = NFS_FH(inode),
911d1aaf 5099 .fl = request,
1da177e4 5100 };
911d1aaf
TM		 5101 struct nfs_lockt_res res = {
5102 .denied = request,
1da177e4
LT		 5103 };
5104 struct rpc_message msg = {
5105 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5106 .rpc_argp = &arg,
5107 .rpc_resp = &res,
5108 .rpc_cred = state->owner->so_cred,
5109 };
1da177e4
LT		 5110 struct nfs4_lock_state *lsp;
5111 int status;
5112
911d1aaf 5113 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5114 status = nfs4_set_lock_state(state, request);
5115 if (status != 0)
5116 goto out;
5117 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5118 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5119 arg.lock_owner.s_dev = server->s_dev;
7c513058 5120 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5121 switch (status) {
5122 case 0:
5123 request->fl_type = F_UNLCK;
5124 break;
5125 case -NFS4ERR_DENIED:
5126 status = 0;
1da177e4 5127 }
70cc6487 5128 request->fl_ops->fl_release_private(request);
a6f951dd 5129 request->fl_ops = NULL;
8d0a8a9d 5130out:
1da177e4
LT		 5131 return status;
5132}
5133
5134static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5135{
5136 struct nfs4_exception exception = { };
5137 int err;
5138
5139 do {
d1b748a5
TM		 5140 err = _nfs4_proc_getlk(state, cmd, request);
5141 trace_nfs4_get_lock(request, state, cmd, err);
5142 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5143 &exception);
5144 } while (exception.retry);
5145 return err;
5146}
5147
5148static int do_vfs_lock(struct file *file, struct file_lock *fl)
5149{
5150 int res = 0;
5151 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5152 case FL_POSIX:
5153 res = posix_lock_file_wait(file, fl);
5154 break;
5155 case FL_FLOCK:
5156 res = flock_lock_file_wait(file, fl);
5157 break;
5158 default:
5159 BUG();
5160 }
1da177e4
LT		 5161 return res;
5162}
5163
faf5f49c 5164struct nfs4_unlockdata {
911d1aaf
TM		 5165 struct nfs_locku_args arg;
5166 struct nfs_locku_res res;
faf5f49c
TM		 5167 struct nfs4_lock_state *lsp;
5168 struct nfs_open_context *ctx;
911d1aaf
TM		 5169 struct file_lock fl;
5170 const struct nfs_server *server;
26e976a8 5171 unsigned long timestamp;
faf5f49c
TM		 5172};
5173
911d1aaf
TM		 5174static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5175 struct nfs_open_context *ctx,
5176 struct nfs4_lock_state *lsp,
5177 struct nfs_seqid *seqid)
5178{
5179 struct nfs4_unlockdata *p;
5180 struct inode *inode = lsp->ls_state->inode;
5181
8535b2be 5182 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5183 if (p == NULL)
5184 return NULL;
5185 p->arg.fh = NFS_FH(inode);
5186 p->arg.fl = &p->fl;
5187 p->arg.seqid = seqid;
c1d51931 5188 p->res.seqid = seqid;
911d1aaf
TM		 5189 p->arg.stateid = &lsp->ls_stateid;
5190 p->lsp = lsp;
5191 atomic_inc(&lsp->ls_count);
5192 /* Ensure we don't close file until we're done freeing locks! */
5193 p->ctx = get_nfs_open_context(ctx);
5194 memcpy(&p->fl, fl, sizeof(p->fl));
5195 p->server = NFS_SERVER(inode);
5196 return p;
5197}
5198
06f814a3 5199static void nfs4_locku_release_calldata(void *data)
faf5f49c 5200{
963d8fe5 5201 struct nfs4_unlockdata *calldata = data;
911d1aaf 5202 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5203 nfs4_put_lock_state(calldata->lsp);
5204 put_nfs_open_context(calldata->ctx);
5205 kfree(calldata);
faf5f49c
TM		 5206}
5207
963d8fe5 5208static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5209{
963d8fe5 5210 struct nfs4_unlockdata *calldata = data;
faf5f49c 5211
14516c3a
TM		 5212 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5213 return;
faf5f49c
TM		 5214 switch (task->tk_status) {
5215 case 0:
f597c537
TM		 5216 nfs4_stateid_copy(&calldata->lsp->ls_stateid,
5217 &calldata->res.stateid);
26e976a8 5218 renew_lease(calldata->server, calldata->timestamp);
faf5f49c 5219 break;
9e33bed5
TM		 5220 case -NFS4ERR_BAD_STATEID:
5221 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5222 case -NFS4ERR_STALE_STATEID:
5223 case -NFS4ERR_EXPIRED:
faf5f49c
TM		 5224 break;
5225 default:
9e33bed5 5226 if (nfs4_async_handle_error(task, calldata->server, NULL) == -EAGAIN)
d00c5d43 5227 rpc_restart_call_prepare(task);
faf5f49c 5228 }
2b1bc308 5229 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5230}
5231
4ce70ada 5232static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5233{
4ce70ada 5234 struct nfs4_unlockdata *calldata = data;
faf5f49c 5235
911d1aaf 5236 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5237 goto out_wait;
795a88c9 5238 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5239 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5240 goto out_no_action;
faf5f49c 5241 }
26e976a8 5242 calldata->timestamp = jiffies;
035168ab 5243 if (nfs4_setup_sequence(calldata->server,
a893693c 5244 &calldata->arg.seq_args,
2240a9e2
TM		 5245 &calldata->res.seq_res,
5246 task) != 0)
5247 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5248 return;
5249out_no_action:
5250 task->tk_action = NULL;
5251out_wait:
5252 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5253}
5254
963d8fe5 5255static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5256 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5257 .rpc_call_done = nfs4_locku_done,
06f814a3 5258 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5259};
5260
a5d16a4d
TM		 5261static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5262 struct nfs_open_context *ctx,
5263 struct nfs4_lock_state *lsp,
5264 struct nfs_seqid *seqid)
5265{
5266 struct nfs4_unlockdata *data;
5138fde0
TM		 5267 struct rpc_message msg = {
5268 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5269 .rpc_cred = ctx->cred,
5270 };
c970aa85
TM		 5271 struct rpc_task_setup task_setup_data = {
5272 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5273 .rpc_message = &msg,
c970aa85 5274 .callback_ops = &nfs4_locku_ops,
101070ca 5275 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5276 .flags = RPC_TASK_ASYNC,
5277 };
a5d16a4d 5278
fa940720
WAA		 5279 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5280 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5281
137d6aca
FF		 5282 /* Ensure this is an unlock - when canceling a lock, the
5283 * canceled lock is passed in, and it won't be an unlock.
5284 */
5285 fl->fl_type = F_UNLCK;
5286
a5d16a4d
TM		 5287 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5288 if (data == NULL) {
5289 nfs_free_seqid(seqid);
5290 return ERR_PTR(-ENOMEM);
5291 }
5292
a9c92d6b 5293 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5294 msg.rpc_argp = &data->arg;
5295 msg.rpc_resp = &data->res;
c970aa85
TM		 5296 task_setup_data.callback_data = data;
5297 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5298}
5299
faf5f49c
TM		 5300static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5301{
65b62a29
TM		 5302 struct inode *inode = state->inode;
5303 struct nfs4_state_owner *sp = state->owner;
5304 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5305 struct nfs_seqid *seqid;
1da177e4 5306 struct nfs4_lock_state *lsp;
06f814a3
TM		 5307 struct rpc_task *task;
5308 int status = 0;
536ff0f8 5309 unsigned char fl_flags = request->fl_flags;
faf5f49c 5310
8d0a8a9d 5311 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5312 /* Unlock _before_ we do the RPC call */
5313 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5314 /* Exclude nfs_delegation_claim_locks() */
5315 mutex_lock(&sp->so_delegreturn_mutex);
5316 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57
TM		 5317 down_read(&nfsi->rwsem);
5318 if (do_vfs_lock(request->fl_file, request) == -ENOENT) {
5319 up_read(&nfsi->rwsem);
65b62a29 5320 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5321 goto out;
19e03c57
TM		 5322 }
5323 up_read(&nfsi->rwsem);
65b62a29 5324 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5325 if (status != 0)
9b073574
TM		 5326 goto out;
5327 /* Is this a delegated lock? */
8d0a8a9d 5328 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5329 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5330 goto out;
8535b2be 5331 seqid = nfs_alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5332 status = -ENOMEM;
911d1aaf 5333 if (seqid == NULL)
9b073574 5334 goto out;
cd3758e3 5335 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5336 status = PTR_ERR(task);
5337 if (IS_ERR(task))
9b073574 5338 goto out;
a5d16a4d 5339 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5340 rpc_put_task(task);
9b073574 5341out:
536ff0f8 5342 request->fl_flags = fl_flags;
d1b748a5 5343 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5344 return status;
5345}
5346
a5d16a4d
TM		 5347struct nfs4_lockdata {
5348 struct nfs_lock_args arg;
5349 struct nfs_lock_res res;
5350 struct nfs4_lock_state *lsp;
5351 struct nfs_open_context *ctx;
5352 struct file_lock fl;
26e976a8 5353 unsigned long timestamp;
a5d16a4d
TM		 5354 int rpc_status;
5355 int cancelled;
66179efe 5356 struct nfs_server *server;
a5d16a4d
TM		 5357};
5358
5359static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5360 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5361 gfp_t gfp_mask)
1da177e4 5362{
a5d16a4d
TM		 5363 struct nfs4_lockdata *p;
5364 struct inode *inode = lsp->ls_state->inode;
1da177e4 5365 struct nfs_server *server = NFS_SERVER(inode);
a5d16a4d 5366
8535b2be 5367 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5368 if (p == NULL)
5369 return NULL;
5370
5371 p->arg.fh = NFS_FH(inode);
5372 p->arg.fl = &p->fl;
8535b2be 5373 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
2f74c0a0
TM		 5374 if (p->arg.open_seqid == NULL)
5375 goto out_free;
8535b2be 5376 p->arg.lock_seqid = nfs_alloc_seqid(&lsp->ls_seqid, gfp_mask);
a5d16a4d 5377 if (p->arg.lock_seqid == NULL)
2f74c0a0 5378 goto out_free_seqid;
a5d16a4d 5379 p->arg.lock_stateid = &lsp->ls_stateid;
7539bbab 5380 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5381 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5382 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5383 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5384 p->lsp = lsp;
66179efe 5385 p->server = server;
a5d16a4d
TM		 5386 atomic_inc(&lsp->ls_count);
5387 p->ctx = get_nfs_open_context(ctx);
5388 memcpy(&p->fl, fl, sizeof(p->fl));
5389 return p;
2f74c0a0
TM		 5390out_free_seqid:
5391 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5392out_free:
5393 kfree(p);
5394 return NULL;
5395}
5396
5397static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5398{
5399 struct nfs4_lockdata *data = calldata;
5400 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5401
3110ff80 5402 dprintk("%s: begin!\n", __func__);
2f74c0a0 5403 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5404 goto out_wait;
a5d16a4d
TM		 5405 /* Do we need to do an open_to_lock_owner? */
5406 if (!(data->arg.lock_seqid->sequence->flags & NFS_SEQID_CONFIRMED)) {
8fe72bac 5407 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5408 goto out_release_lock_seqid;
8fe72bac 5409 }
8e472f33 5410 data->arg.open_stateid = &state->open_stateid;
a5d16a4d 5411 data->arg.new_lock_owner = 1;
c1d51931 5412 data->res.open_seqid = data->arg.open_seqid;
2f74c0a0
TM		 5413 } else
5414 data->arg.new_lock_owner = 0;
5d422301
TM		 5415 if (!nfs4_valid_open_stateid(state)) {
5416 data->rpc_status = -EBADF;
5417 task->tk_action = NULL;
5418 goto out_release_open_seqid;
5419 }
26e976a8 5420 data->timestamp = jiffies;
035168ab
TM		 5421 if (nfs4_setup_sequence(data->server,
5422 &data->arg.seq_args,
2240a9e2 5423 &data->res.seq_res,
d9afbd1b 5424 task) == 0)
66179efe 5425 return;
5d422301 5426out_release_open_seqid:
2240a9e2
TM		 5427 nfs_release_seqid(data->arg.open_seqid);
5428out_release_lock_seqid:
5429 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5430out_wait:
5431 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5432 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5433}
5434
a5d16a4d
TM		 5435static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5436{
5437 struct nfs4_lockdata *data = calldata;
5438
3110ff80 5439 dprintk("%s: begin!\n", __func__);
a5d16a4d 5440
14516c3a
TM		 5441 if (!nfs4_sequence_done(task, &data->res.seq_res))
5442 return;
66179efe 5443
a5d16a4d 5444 data->rpc_status = task->tk_status;
a5d16a4d 5445 if (data->arg.new_lock_owner != 0) {
a5d16a4d
TM		 5446 if (data->rpc_status == 0)
5447 nfs_confirm_seqid(&data->lsp->ls_seqid, 0);
5448 else
5449 goto out;
5450 }
5451 if (data->rpc_status == 0) {
f597c537 5452 nfs4_stateid_copy(&data->lsp->ls_stateid, &data->res.stateid);
795a88c9 5453 set_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags);
3d4ff43d 5454 renew_lease(NFS_SERVER(data->ctx->dentry->d_inode), data->timestamp);
a5d16a4d 5455 }
a5d16a4d 5456out:
3110ff80 5457 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5458}
5459
5460static void nfs4_lock_release(void *calldata)
5461{
5462 struct nfs4_lockdata *data = calldata;
5463
3110ff80 5464 dprintk("%s: begin!\n", __func__);
2f74c0a0 5465 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5466 if (data->cancelled != 0) {
5467 struct rpc_task *task;
5468 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5469 data->arg.lock_seqid);
5470 if (!IS_ERR(task))
bf294b41 5471 rpc_put_task_async(task);
3110ff80 5472 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5473 } else
5474 nfs_free_seqid(data->arg.lock_seqid);
5475 nfs4_put_lock_state(data->lsp);
5476 put_nfs_open_context(data->ctx);
5477 kfree(data);
3110ff80 5478 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5479}
5480
5481static const struct rpc_call_ops nfs4_lock_ops = {
5482 .rpc_call_prepare = nfs4_lock_prepare,
5483 .rpc_call_done = nfs4_lock_done,
5484 .rpc_release = nfs4_lock_release,
5485};
5486
2bee72a6
TM		 5487static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5488{
2bee72a6
TM		 5489 switch (error) {
5490 case -NFS4ERR_ADMIN_REVOKED:
5491 case -NFS4ERR_BAD_STATEID:
ecac799a 5492 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5493 if (new_lock_owner != 0 ||
795a88c9 5494 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5495 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5496 break;
5497 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5498 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5499 case -NFS4ERR_EXPIRED:
5500 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5501 };
5502}
5503
afe6c27c 5504static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5505{
5506 struct nfs4_lockdata *data;
5507 struct rpc_task *task;
5138fde0
TM		 5508 struct rpc_message msg = {
5509 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5510 .rpc_cred = state->owner->so_cred,
5511 };
c970aa85
TM		 5512 struct rpc_task_setup task_setup_data = {
5513 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5514 .rpc_message = &msg,
c970aa85 5515 .callback_ops = &nfs4_lock_ops,
101070ca 5516 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5517 .flags = RPC_TASK_ASYNC,
5518 };
a5d16a4d
TM		 5519 int ret;
5520
3110ff80 5521 dprintk("%s: begin!\n", __func__);
cd3758e3 5522 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5523 fl->fl_u.nfs4_fl.owner,
5524 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5525 if (data == NULL)
5526 return -ENOMEM;
5527 if (IS_SETLKW(cmd))
5528 data->arg.block = 1;
a9c92d6b 5529 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5530 msg.rpc_argp = &data->arg;
5531 msg.rpc_resp = &data->res;
c970aa85 5532 task_setup_data.callback_data = data;
8fe72bac
TM		 5533 if (recovery_type > NFS_LOCK_NEW) {
5534 if (recovery_type == NFS_LOCK_RECLAIM)
5535 data->arg.reclaim = NFS_LOCK_RECLAIM;
5536 nfs4_set_sequence_privileged(&data->arg.seq_args);
5537 }
c970aa85 5538 task = rpc_run_task(&task_setup_data);
7a1218a2 5539 if (IS_ERR(task))
a5d16a4d 5540 return PTR_ERR(task);
a5d16a4d
TM		 5541 ret = nfs4_wait_for_completion_rpc_task(task);
5542 if (ret == 0) {
5543 ret = data->rpc_status;
2bee72a6
TM		 5544 if (ret)
5545 nfs4_handle_setlk_error(data->server, data->lsp,
5546 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5547 } else
5548 data->cancelled = 1;
e6b3c4db 5549 rpc_put_task(task);
3110ff80 5550 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5551 return ret;
1da177e4
LT		 5552}
5553
5554static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5555{
202b50dc 5556 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5557 struct nfs4_exception exception = {
5558 .inode = state->inode,
5559 };
202b50dc
TM		 5560 int err;
5561
5562 do {
42a2d13e
TM		 5563 /* Cache the lock if possible... */
5564 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5565 return 0;
afe6c27c 5566 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5567 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5568 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5569 break;
5570 nfs4_handle_exception(server, err, &exception);
5571 } while (exception.retry);
5572 return err;
1da177e4
LT		 5573}
5574
5575static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5576{
202b50dc 5577 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5578 struct nfs4_exception exception = {
5579 .inode = state->inode,
5580 };
202b50dc
TM		 5581 int err;
5582
6bfc93ef
TM		 5583 err = nfs4_set_lock_state(state, request);
5584 if (err != 0)
5585 return err;
f6de7a39 5586 if (!recover_lost_locks) {
ef1820f9
N		 5587 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5588 return 0;
5589 }
202b50dc 5590 do {
42a2d13e
TM		 5591 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5592 return 0;
afe6c27c 5593 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5594 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5595 switch (err) {
5596 default:
5597 goto out;
5598 case -NFS4ERR_GRACE:
5599 case -NFS4ERR_DELAY:
5600 nfs4_handle_exception(server, err, &exception);
5601 err = 0;
5602 }
202b50dc 5603 } while (exception.retry);
a9ed2e25 5604out:
202b50dc 5605 return err;
1da177e4
LT		 5606}
5607
f062eb6c 5608#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5609/**
5610 * nfs41_check_expired_locks - possibly free a lock stateid
5611 *
5612 * @state: NFSv4 state for an inode
5613 *
5614 * Returns NFS_OK if recovery for this stateid is now finished.
5615 * Otherwise a negative NFS4ERR value is returned.
5616 */
b01dd1d8 5617static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5618{
eb64cf96 5619 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5620 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5621 struct nfs_server *server = NFS_SERVER(state->inode);
5622
b01dd1d8 5623 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5624 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5625 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5626
5627 status = nfs41_test_stateid(server,
5628 &lsp->ls_stateid,
5629 cred);
08cb47fa 5630 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5631 if (status != NFS_OK) {
3e60ffdd
CL		 5632 /* Free the stateid unless the server
5633 * informs us the stateid is unrecognized. */
89af2739
CL		 5634 if (status != -NFS4ERR_BAD_STATEID)
5635 nfs41_free_stateid(server,
ab7cb0df
TM		 5636 &lsp->ls_stateid,
5637 cred);
795a88c9 5638 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5639 ret = status;
5640 }
5641 }
5642 };
5643
5644 return ret;
5645}
5646
5647static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5648{
5649 int status = NFS_OK;
5650
5651 if (test_bit(LK_STATE_IN_USE, &state->flags))
5652 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5653 if (status != NFS_OK)
5654 status = nfs4_lock_expired(state, request);
5655 return status;
f062eb6c
BS		 5656}
5657#endif
5658
1da177e4
LT		 5659static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5660{
9a99af49 5661 struct nfs4_state_owner *sp = state->owner;
19e03c57 5662 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5663 unsigned char fl_flags = request->fl_flags;
9a99af49 5664 unsigned int seq;
8e469ebd 5665 int status = -ENOLCK;
1da177e4 5666
8e469ebd
TM		 5667 if ((fl_flags & FL_POSIX) &&
5668 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
5669 goto out;
6bfc93ef 5670 /* Is this a delegated open? */
6bfc93ef
TM		 5671 status = nfs4_set_lock_state(state, request);
5672 if (status != 0)
5673 goto out;
01c3b861
TM		 5674 request->fl_flags |= FL_ACCESS;
5675 status = do_vfs_lock(request->fl_file, request);
5676 if (status < 0)
5677 goto out;
19e03c57 5678 down_read(&nfsi->rwsem);
01c3b861 5679 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 5680 /* Yes: cache locks! */
01c3b861 5681 /* ...but avoid races with delegation recall... */
19e03c57
TM		 5682 request->fl_flags = fl_flags & ~FL_SLEEP;
5683 status = do_vfs_lock(request->fl_file, request);
5684 goto out_unlock;
01c3b861 5685 }
9a99af49
TM		 5686 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
5687 up_read(&nfsi->rwsem);
afe6c27c 5688 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
6bfc93ef 5689 if (status != 0)
9a99af49
TM		 5690 goto out;
5691 down_read(&nfsi->rwsem);
5692 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq)) {
5693 status = -NFS4ERR_DELAY;
01c3b861 5694 goto out_unlock;
9a99af49 5695 }
6bfc93ef 5696 /* Note: we always want to sleep here! */
01c3b861 5697 request->fl_flags = fl_flags | FL_SLEEP;
6bfc93ef 5698 if (do_vfs_lock(request->fl_file, request) < 0)
a030889a
WAA		 5699 printk(KERN_WARNING "NFS: %s: VFS is out of sync with lock "
5700 "manager!\n", __func__);
01c3b861 5701out_unlock:
19e03c57 5702 up_read(&nfsi->rwsem);
01c3b861
TM		 5703out:
5704 request->fl_flags = fl_flags;
1da177e4
LT		 5705 return status;
5706}
5707
5708static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5709{
a1d0b5ee
TM		 5710 struct nfs4_exception exception = {
5711 .state = state,
05ffe24f 5712 .inode = state->inode,
a1d0b5ee 5713 };
1da177e4
LT		 5714 int err;
5715
5716 do {
965b5d67 5717 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 5718 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 5719 if (err == -NFS4ERR_DENIED)
5720 err = -EAGAIN;
1da177e4 5721 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 5722 err, &exception);
1da177e4
LT		 5723 } while (exception.retry);
5724 return err;
5725}
5726
5727static int
5728nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
5729{
5730 struct nfs_open_context *ctx;
5731 struct nfs4_state *state;
5732 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
5733 int status;
5734
5735 /* verify open state */
cd3758e3 5736 ctx = nfs_file_open_context(filp);
1da177e4
LT		 5737 state = ctx->state;
5738
5739 if (request->fl_start < 0 || request->fl_end < 0)
5740 return -EINVAL;
5741
d953126a
TM		 5742 if (IS_GETLK(cmd)) {
5743 if (state != NULL)
5744 return nfs4_proc_getlk(state, F_GETLK, request);
5745 return 0;
5746 }
1da177e4
LT		 5747
5748 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
5749 return -EINVAL;
5750
d953126a
TM		 5751 if (request->fl_type == F_UNLCK) {
5752 if (state != NULL)
5753 return nfs4_proc_unlck(state, cmd, request);
5754 return 0;
5755 }
1da177e4 5756
d953126a
TM		 5757 if (state == NULL)
5758 return -ENOLCK;
55725513
TM		 5759 /*
5760 * Don't rely on the VFS having checked the file open mode,
5761 * since it won't do this for flock() locks.
5762 */
f44106e2 5763 switch (request->fl_type) {
55725513
TM		 5764 case F_RDLCK:
5765 if (!(filp->f_mode & FMODE_READ))
5766 return -EBADF;
5767 break;
5768 case F_WRLCK:
5769 if (!(filp->f_mode & FMODE_WRITE))
5770 return -EBADF;
5771 }
5772
1da177e4
LT		 5773 do {
5774 status = nfs4_proc_setlk(state, cmd, request);
5775 if ((status != -EAGAIN) || IS_SETLK(cmd))
5776 break;
5777 timeout = nfs4_set_lock_task_retry(timeout);
5778 status = -ERESTARTSYS;
5779 if (signalled())
5780 break;
5781 } while(status < 0);
1da177e4
LT		 5782 return status;
5783}
5784
db4f2e63 5785int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 5786{
5787 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 5788 int err;
5789
5790 err = nfs4_set_lock_state(state, fl);
5791 if (err != 0)
db4f2e63 5792 return err;
4a706fa0 5793 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 5794 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 5795}
6b3b5496 5796
cf470c3e
TM		 5797struct nfs_release_lockowner_data {
5798 struct nfs4_lock_state *lsp;
5ae67c4f 5799 struct nfs_server *server;
cf470c3e 5800 struct nfs_release_lockowner_args args;
fbd4bfd1
CL		 5801 struct nfs4_sequence_args seq_args;
5802 struct nfs4_sequence_res seq_res;
cf470c3e
TM		 5803};
5804
fbd4bfd1
CL		 5805static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
5806{
5807 struct nfs_release_lockowner_data *data = calldata;
5808 nfs40_setup_sequence(data->server,
5809 &data->seq_args, &data->seq_res, task);
5810}
5811
5812static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
5813{
5814 struct nfs_release_lockowner_data *data = calldata;
5815 nfs40_sequence_done(task, &data->seq_res);
5816}
5817
d3c7b7cc
TM		 5818static void nfs4_release_lockowner_release(void *calldata)
5819{
cf470c3e 5820 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 5821 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 5822 kfree(calldata);
5823}
5824
17280175 5825static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 5826 .rpc_call_prepare = nfs4_release_lockowner_prepare,
5827 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 5828 .rpc_release = nfs4_release_lockowner_release,
5829};
5830
c8b2d0bf 5831static int nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 5832{
cf470c3e 5833 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 5834 struct rpc_message msg = {
5835 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
5836 };
5837
5838 if (server->nfs_client->cl_mvops->minor_version != 0)
cf470c3e 5839 return -EINVAL;
fbd4bfd1 5840
cf470c3e
TM		 5841 data = kmalloc(sizeof(*data), GFP_NOFS);
5842 if (!data)
5843 return -ENOMEM;
fbd4bfd1 5844 nfs4_init_sequence(&data->seq_args, &data->seq_res, 0);
cf470c3e 5845 data->lsp = lsp;
5ae67c4f 5846 data->server = server;
cf470c3e
TM		 5847 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
5848 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
5849 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 5850
cf470c3e
TM		 5851 msg.rpc_argp = &data->args;
5852 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
5853 return 0;
d3c7b7cc
TM		 5854}
5855
aa1870af
BF		 5856#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
5857
64c2ce8b
AK		 5858static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
5859 const void *buf, size_t buflen,
5860 int flags, int type)
6b3b5496 5861{
64c2ce8b
AK		 5862 if (strcmp(key, "") != 0)
5863 return -EINVAL;
4b580ee3 5864
64c2ce8b 5865 return nfs4_proc_set_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5866}
5867
64c2ce8b
AK		 5868static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
5869 void *buf, size_t buflen, int type)
6b3b5496 5870{
64c2ce8b
AK		 5871 if (strcmp(key, "") != 0)
5872 return -EINVAL;
aa1870af 5873
64c2ce8b 5874 return nfs4_proc_get_acl(dentry->d_inode, buf, buflen);
6b3b5496
BF		 5875}
5876
64c2ce8b
AK		 5877static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
5878 size_t list_len, const char *name,
5879 size_t name_len, int type)
6b3b5496 5880{
64c2ce8b 5881 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 5882
096455a2
BF		 5883 if (!nfs4_server_supports_acls(NFS_SERVER(dentry->d_inode)))
5884 return 0;
64c2ce8b
AK		 5885
5886 if (list && len <= list_len)
5887 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 5888 return len;
6b3b5496
BF		 5889}
5890
c9bccef6
DQ		 5891#ifdef CONFIG_NFS_V4_SECURITY_LABEL
5892static inline int nfs4_server_supports_labels(struct nfs_server *server)
5893{
5894 return server->caps & NFS_CAP_SECURITY_LABEL;
5895}
5896
5897static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
5898 const void *buf, size_t buflen,
5899 int flags, int type)
5900{
5901 if (security_ismaclabel(key))
5902 return nfs4_set_security_label(dentry, buf, buflen);
5903
5904 return -EOPNOTSUPP;
5905}
5906
5907static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
5908 void *buf, size_t buflen, int type)
5909{
5910 if (security_ismaclabel(key))
5911 return nfs4_get_security_label(dentry->d_inode, buf, buflen);
5912 return -EOPNOTSUPP;
5913}
5914
5915static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
5916 size_t list_len, const char *name,
5917 size_t name_len, int type)
5918{
5919 size_t len = 0;
5920
5921 if (nfs_server_capable(dentry->d_inode, NFS_CAP_SECURITY_LABEL)) {
5922 len = security_inode_listsecurity(dentry->d_inode, NULL, 0);
5923 if (list && len <= list_len)
5924 security_inode_listsecurity(dentry->d_inode, list, len);
5925 }
5926 return len;
5927}
5928
5929static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
5930 .prefix = XATTR_SECURITY_PREFIX,
5931 .list = nfs4_xattr_list_nfs4_label,
5932 .get = nfs4_xattr_get_nfs4_label,
5933 .set = nfs4_xattr_set_nfs4_label,
5934};
5935#endif
5936
5937
533eb461
AA		 5938/*
5939 * nfs_fhget will use either the mounted_on_fileid or the fileid
5940 */
69aaaae1
TM		 5941static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
5942{
533eb461
AA		 5943 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
5944 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
5945 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 5946 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 5947 return;
5948
5949 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 5950 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 5951 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
5952 fattr->nlink = 2;
5953}
5954
f05d147f
BS		 5955static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5956 const struct qstr *name,
5957 struct nfs4_fs_locations *fs_locations,
5958 struct page *page)
683b57b4
TM		 5959{
5960 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 5961 u32 bitmask[3] = {
361e624f 5962 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 5963 };
5964 struct nfs4_fs_locations_arg args = {
5965 .dir_fh = NFS_FH(dir),
c228fd3a 5966 .name = name,
683b57b4
TM		 5967 .page = page,
5968 .bitmask = bitmask,
5969 };
22958463
BH		 5970 struct nfs4_fs_locations_res res = {
5971 .fs_locations = fs_locations,
5972 };
683b57b4
TM		 5973 struct rpc_message msg = {
5974 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
5975 .rpc_argp = &args,
22958463 5976 .rpc_resp = &res,
683b57b4
TM		 5977 };
5978 int status;
5979
3110ff80 5980 dprintk("%s: start\n", __func__);
533eb461
AA		 5981
5982 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
5983 * is not supported */
5984 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
5985 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
5986 else
5987 bitmask[0] |= FATTR4_WORD0_FILEID;
5988
c228fd3a 5989 nfs_fattr_init(&fs_locations->fattr);
683b57b4 5990 fs_locations->server = server;
830b8e33 5991 fs_locations->nlocations = 0;
f05d147f 5992 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 5993 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 5994 return status;
5995}
5996
f05d147f
BS		 5997int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
5998 const struct qstr *name,
5999 struct nfs4_fs_locations *fs_locations,
6000 struct page *page)
db0a9593
BS		 6001{
6002 struct nfs4_exception exception = { };
6003 int err;
6004 do {
078ea3df
TM		 6005 err = _nfs4_proc_fs_locations(client, dir, name,
6006 fs_locations, page);
6007 trace_nfs4_get_fs_locations(dir, name, err);
6008 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6009 &exception);
6010 } while (exception.retry);
6011 return err;
6012}
6013
b03d735b
CL		 6014/*
6015 * This operation also signals the server that this client is
6016 * performing migration recovery. The server can stop returning
6017 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6018 * appended to this compound to identify the client ID which is
6019 * performing recovery.
6020 */
6021static int _nfs40_proc_get_locations(struct inode *inode,
6022 struct nfs4_fs_locations *locations,
6023 struct page *page, struct rpc_cred *cred)
6024{
6025 struct nfs_server *server = NFS_SERVER(inode);
6026 struct rpc_clnt *clnt = server->client;
6027 u32 bitmask[2] = {
6028 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6029 };
6030 struct nfs4_fs_locations_arg args = {
6031 .clientid = server->nfs_client->cl_clientid,
6032 .fh = NFS_FH(inode),
6033 .page = page,
6034 .bitmask = bitmask,
6035 .migration = 1, /* skip LOOKUP */
6036 .renew = 1, /* append RENEW */
6037 };
6038 struct nfs4_fs_locations_res res = {
6039 .fs_locations = locations,
6040 .migration = 1,
6041 .renew = 1,
6042 };
6043 struct rpc_message msg = {
6044 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6045 .rpc_argp = &args,
6046 .rpc_resp = &res,
6047 .rpc_cred = cred,
6048 };
6049 unsigned long now = jiffies;
6050 int status;
6051
6052 nfs_fattr_init(&locations->fattr);
6053 locations->server = server;
6054 locations->nlocations = 0;
6055
6056 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6057 nfs4_set_sequence_privileged(&args.seq_args);
6058 status = nfs4_call_sync_sequence(clnt, server, &msg,
6059 &args.seq_args, &res.seq_res);
6060 if (status)
6061 return status;
6062
6063 renew_lease(server, now);
6064 return 0;
6065}
6066
6067#ifdef CONFIG_NFS_V4_1
6068
6069/*
6070 * This operation also signals the server that this client is
6071 * performing migration recovery. The server can stop asserting
6072 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6073 * performing this operation is identified in the SEQUENCE
6074 * operation in this compound.
6075 *
6076 * When the client supports GETATTR(fs_locations_info), it can
6077 * be plumbed in here.
6078 */
6079static int _nfs41_proc_get_locations(struct inode *inode,
6080 struct nfs4_fs_locations *locations,
6081 struct page *page, struct rpc_cred *cred)
6082{
6083 struct nfs_server *server = NFS_SERVER(inode);
6084 struct rpc_clnt *clnt = server->client;
6085 u32 bitmask[2] = {
6086 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6087 };
6088 struct nfs4_fs_locations_arg args = {
6089 .fh = NFS_FH(inode),
6090 .page = page,
6091 .bitmask = bitmask,
6092 .migration = 1, /* skip LOOKUP */
6093 };
6094 struct nfs4_fs_locations_res res = {
6095 .fs_locations = locations,
6096 .migration = 1,
6097 };
6098 struct rpc_message msg = {
6099 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6100 .rpc_argp = &args,
6101 .rpc_resp = &res,
6102 .rpc_cred = cred,
6103 };
6104 int status;
6105
6106 nfs_fattr_init(&locations->fattr);
6107 locations->server = server;
6108 locations->nlocations = 0;
6109
6110 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6111 nfs4_set_sequence_privileged(&args.seq_args);
6112 status = nfs4_call_sync_sequence(clnt, server, &msg,
6113 &args.seq_args, &res.seq_res);
6114 if (status == NFS4_OK &&
6115 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6116 status = -NFS4ERR_LEASE_MOVED;
6117 return status;
6118}
6119
6120#endif /* CONFIG_NFS_V4_1 */
6121
6122/**
6123 * nfs4_proc_get_locations - discover locations for a migrated FSID
6124 * @inode: inode on FSID that is migrating
6125 * @locations: result of query
6126 * @page: buffer
6127 * @cred: credential to use for this operation
6128 *
6129 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6130 * operation failed, or a negative errno if a local error occurred.
6131 *
6132 * On success, "locations" is filled in, but if the server has
6133 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6134 * asserted.
6135 *
6136 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6137 * from this client that require migration recovery.
6138 */
6139int nfs4_proc_get_locations(struct inode *inode,
6140 struct nfs4_fs_locations *locations,
6141 struct page *page, struct rpc_cred *cred)
6142{
6143 struct nfs_server *server = NFS_SERVER(inode);
6144 struct nfs_client *clp = server->nfs_client;
6145 const struct nfs4_mig_recovery_ops *ops =
6146 clp->cl_mvops->mig_recovery_ops;
6147 struct nfs4_exception exception = { };
6148 int status;
6149
6150 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6151 (unsigned long long)server->fsid.major,
6152 (unsigned long long)server->fsid.minor,
6153 clp->cl_hostname);
6154 nfs_display_fhandle(NFS_FH(inode), __func__);
6155
6156 do {
6157 status = ops->get_locations(inode, locations, page, cred);
6158 if (status != -NFS4ERR_DELAY)
6159 break;
6160 nfs4_handle_exception(server, status, &exception);
6161 } while (exception.retry);
6162 return status;
6163}
6164
44c99933
CL		 6165/*
6166 * This operation also signals the server that this client is
6167 * performing "lease moved" recovery. The server can stop
6168 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6169 * is appended to this compound to identify the client ID which is
6170 * performing recovery.
6171 */
6172static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6173{
6174 struct nfs_server *server = NFS_SERVER(inode);
6175 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6176 struct rpc_clnt *clnt = server->client;
6177 struct nfs4_fsid_present_arg args = {
6178 .fh = NFS_FH(inode),
6179 .clientid = clp->cl_clientid,
6180 .renew = 1, /* append RENEW */
6181 };
6182 struct nfs4_fsid_present_res res = {
6183 .renew = 1,
6184 };
6185 struct rpc_message msg = {
6186 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6187 .rpc_argp = &args,
6188 .rpc_resp = &res,
6189 .rpc_cred = cred,
6190 };
6191 unsigned long now = jiffies;
6192 int status;
6193
6194 res.fh = nfs_alloc_fhandle();
6195 if (res.fh == NULL)
6196 return -ENOMEM;
6197
6198 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6199 nfs4_set_sequence_privileged(&args.seq_args);
6200 status = nfs4_call_sync_sequence(clnt, server, &msg,
6201 &args.seq_args, &res.seq_res);
6202 nfs_free_fhandle(res.fh);
6203 if (status)
6204 return status;
6205
6206 do_renew_lease(clp, now);
6207 return 0;
6208}
6209
6210#ifdef CONFIG_NFS_V4_1
6211
6212/*
6213 * This operation also signals the server that this client is
6214 * performing "lease moved" recovery. The server can stop asserting
6215 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6216 * this operation is identified in the SEQUENCE operation in this
6217 * compound.
6218 */
6219static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6220{
6221 struct nfs_server *server = NFS_SERVER(inode);
6222 struct rpc_clnt *clnt = server->client;
6223 struct nfs4_fsid_present_arg args = {
6224 .fh = NFS_FH(inode),
6225 };
6226 struct nfs4_fsid_present_res res = {
6227 };
6228 struct rpc_message msg = {
6229 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6230 .rpc_argp = &args,
6231 .rpc_resp = &res,
6232 .rpc_cred = cred,
6233 };
6234 int status;
6235
6236 res.fh = nfs_alloc_fhandle();
6237 if (res.fh == NULL)
6238 return -ENOMEM;
6239
6240 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6241 nfs4_set_sequence_privileged(&args.seq_args);
6242 status = nfs4_call_sync_sequence(clnt, server, &msg,
6243 &args.seq_args, &res.seq_res);
6244 nfs_free_fhandle(res.fh);
6245 if (status == NFS4_OK &&
6246 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6247 status = -NFS4ERR_LEASE_MOVED;
6248 return status;
6249}
6250
6251#endif /* CONFIG_NFS_V4_1 */
6252
6253/**
6254 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6255 * @inode: inode on FSID to check
6256 * @cred: credential to use for this operation
6257 *
6258 * Server indicates whether the FSID is present, moved, or not
6259 * recognized. This operation is necessary to clear a LEASE_MOVED
6260 * condition for this client ID.
6261 *
6262 * Returns NFS4_OK if the FSID is present on this server,
6263 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6264 * NFS4ERR code if some error occurred on the server, or a
6265 * negative errno if a local failure occurred.
6266 */
6267int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6268{
6269 struct nfs_server *server = NFS_SERVER(inode);
6270 struct nfs_client *clp = server->nfs_client;
6271 const struct nfs4_mig_recovery_ops *ops =
6272 clp->cl_mvops->mig_recovery_ops;
6273 struct nfs4_exception exception = { };
6274 int status;
6275
6276 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6277 (unsigned long long)server->fsid.major,
6278 (unsigned long long)server->fsid.minor,
6279 clp->cl_hostname);
6280 nfs_display_fhandle(NFS_FH(inode), __func__);
6281
6282 do {
6283 status = ops->fsid_present(inode, cred);
6284 if (status != -NFS4ERR_DELAY)
6285 break;
6286 nfs4_handle_exception(server, status, &exception);
6287 } while (exception.retry);
6288 return status;
6289}
6290
5ec16a85 6291/**
a5250def
WAA		 6292 * If 'use_integrity' is true and the state managment nfs_client
6293 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6294 * and the machine credential as per RFC3530bis and RFC5661 Security
6295 * Considerations sections. Otherwise, just use the user cred with the
6296 * filesystem's rpc_client.
5ec16a85 6297 */
a5250def 6298static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6299{
6300 int status;
6301 struct nfs4_secinfo_arg args = {
6302 .dir_fh = NFS_FH(dir),
6303 .name = name,
6304 };
6305 struct nfs4_secinfo_res res = {
6306 .flavors = flavors,
6307 };
6308 struct rpc_message msg = {
6309 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6310 .rpc_argp = &args,
6311 .rpc_resp = &res,
6312 };
a5250def 6313 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6314 struct rpc_cred *cred = NULL;
a5250def
WAA		 6315
6316 if (use_integrity) {
6317 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6318 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6319 msg.rpc_cred = cred;
a5250def 6320 }
5a5ea0d4
BS		 6321
6322 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6323
6324 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6325 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6326
a5250def
WAA		 6327 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6328 &res.seq_res, 0);
5a5ea0d4 6329 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6330
7cb852df
WAA		 6331 if (cred)
6332 put_rpccred(cred);
a5250def 6333
5a5ea0d4
BS		 6334 return status;
6335}
6336
72de53ec
BS		 6337int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6338 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6339{
6340 struct nfs4_exception exception = { };
6341 int err;
6342 do {
a5250def
WAA		 6343 err = -NFS4ERR_WRONGSEC;
6344
6345 /* try to use integrity protection with machine cred */
6346 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6347 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6348
6349 /*
6350 * if unable to use integrity protection, or SECINFO with
6351 * integrity protection returns NFS4ERR_WRONGSEC (which is
6352 * disallowed by spec, but exists in deployed servers) use
6353 * the current filesystem's rpc_client and the user cred.
6354 */
6355 if (err == -NFS4ERR_WRONGSEC)
6356 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6357
078ea3df
TM		 6358 trace_nfs4_secinfo(dir, name, err);
6359 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6360 &exception);
6361 } while (exception.retry);
6362 return err;
6363}
6364
557134a3 6365#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6366/*
6367 * Check the exchange flags returned by the server for invalid flags, having
6368 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6369 * DS flags set.
6370 */
6371static int nfs4_check_cl_exchange_flags(u32 flags)
6372{
6373 if (flags & ~EXCHGID4_FLAG_MASK_R)
6374 goto out_inval;
6375 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6376 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6377 goto out_inval;
6378 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6379 goto out_inval;
6380 return NFS_OK;
6381out_inval:
6382 return -NFS4ERR_INVAL;
6383}
6384
78fe0f41 6385static bool
79d4e1f0
CL		 6386nfs41_same_server_scope(struct nfs41_server_scope *a,
6387 struct nfs41_server_scope *b)
78fe0f41
WAA		 6388{
6389 if (a->server_scope_sz == b->server_scope_sz &&
6390 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6391 return true;
6392
6393 return false;
6394}
6395
7c44f1ae
WAA		 6396/*
6397 * nfs4_proc_bind_conn_to_session()
6398 *
6399 * The 4.1 client currently uses the same TCP connection for the
6400 * fore and backchannel.
6401 */
2cf047c9 6402int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6403{
6404 int status;
6405 struct nfs41_bind_conn_to_session_res res;
6406 struct rpc_message msg = {
6407 .rpc_proc =
6408 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
6409 .rpc_argp = clp,
6410 .rpc_resp = &res,
2cf047c9 6411 .rpc_cred = cred,
7c44f1ae
WAA		 6412 };
6413
6414 dprintk("--> %s\n", __func__);
7c44f1ae
WAA		 6415
6416 res.session = kzalloc(sizeof(struct nfs4_session), GFP_NOFS);
6417 if (unlikely(res.session == NULL)) {
6418 status = -ENOMEM;
6419 goto out;
6420 }
6421
6422 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6423 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae
WAA		 6424 if (status == 0) {
6425 if (memcmp(res.session->sess_id.data,
6426 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6427 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6428 status = -EIO;
6429 goto out_session;
6430 }
6431 if (res.dir != NFS4_CDFS4_BOTH) {
6432 dprintk("NFS: %s: Unexpected direction from server\n",
6433 __func__);
6434 status = -EIO;
6435 goto out_session;
6436 }
6437 if (res.use_conn_in_rdma_mode) {
6438 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6439 __func__);
6440 status = -EIO;
6441 goto out_session;
6442 }
6443 }
6444out_session:
6445 kfree(res.session);
6446out:
6447 dprintk("<-- %s status= %d\n", __func__, status);
6448 return status;
6449}
6450
99fe60d0 6451/*
fa940720
WAA		 6452 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6453 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6454 */
6455static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6456 .how = SP4_MACH_CRED,
6457 .enforce.u.words = {
6458 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6459 1 << (OP_EXCHANGE_ID - 32) |
6460 1 << (OP_CREATE_SESSION - 32) |
6461 1 << (OP_DESTROY_SESSION - 32) |
6462 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6463 },
6464 .allow.u.words = {
6465 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6466 1 << (OP_LOCKU) |
6467 1 << (OP_COMMIT),
8b5bee2e 6468 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6469 1 << (OP_SECINFO_NO_NAME - 32) |
6470 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6471 1 << (OP_FREE_STATEID - 32) |
6472 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6473 }
6474};
6475
6476/*
6477 * Select the state protection mode for client `clp' given the server results
6478 * from exchange_id in `sp'.
99fe60d0 6479 *
2031cd1a
WAA		 6480 * Returns 0 on success, negative errno otherwise.
6481 */
6482static int nfs4_sp4_select_mode(struct nfs_client *clp,
6483 struct nfs41_state_protection *sp)
6484{
6485 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6486 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6487 1 << (OP_EXCHANGE_ID - 32) |
6488 1 << (OP_CREATE_SESSION - 32) |
6489 1 << (OP_DESTROY_SESSION - 32) |
6490 1 << (OP_DESTROY_CLIENTID - 32)
6491 };
6492 unsigned int i;
6493
6494 if (sp->how == SP4_MACH_CRED) {
6495 /* Print state protect result */
6496 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6497 for (i = 0; i <= LAST_NFS4_OP; i++) {
6498 if (test_bit(i, sp->enforce.u.longs))
6499 dfprintk(MOUNT, " enforce op %d\n", i);
6500 if (test_bit(i, sp->allow.u.longs))
6501 dfprintk(MOUNT, " allow op %d\n", i);
6502 }
6503
6504 /* make sure nothing is on enforce list that isn't supported */
6505 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6506 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6507 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6508 return -EINVAL;
6509 }
6510 }
6511
6512 /*
6513 * Minimal mode - state operations are allowed to use machine
6514 * credential. Note this already happens by default, so the
6515 * client doesn't have to do anything more than the negotiation.
6516 *
6517 * NOTE: we don't care if EXCHANGE_ID is in the list -
6518 * we're already using the machine cred for exchange_id
6519 * and will never use a different cred.
6520 */
6521 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6522 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6523 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6524 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6525 dfprintk(MOUNT, "sp4_mach_cred:\n");
6526 dfprintk(MOUNT, " minimal mode enabled\n");
6527 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6528 } else {
6529 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6530 return -EINVAL;
6531 }
fa940720
WAA		 6532
6533 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6534 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6535 dfprintk(MOUNT, " cleanup mode enabled\n");
6536 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6537 }
8b5bee2e
WAA		 6538
6539 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6540 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6541 dfprintk(MOUNT, " secinfo mode enabled\n");
6542 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6543 }
3787d506
WAA		 6544
6545 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6546 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6547 dfprintk(MOUNT, " stateid mode enabled\n");
6548 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6549 }
8c21c62c
WAA		 6550
6551 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6552 dfprintk(MOUNT, " write mode enabled\n");
6553 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6554 }
6555
6556 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6557 dfprintk(MOUNT, " commit mode enabled\n");
6558 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6559 }
2031cd1a
WAA		 6560 }
6561
6562 return 0;
6563}
6564
6565/*
6566 * _nfs4_proc_exchange_id()
6bbb4ae8 6567 *
2031cd1a 6568 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6569 */
2031cd1a
WAA		 6570static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6571 u32 sp4_how)
99fe60d0
BH		 6572{
6573 nfs4_verifier verifier;
6574 struct nfs41_exchange_id_args args = {
cd93710e 6575 .verifier = &verifier,
99fe60d0 6576 .client = clp,
4f0b429d
TM		 6577 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6578 EXCHGID4_FLAG_BIND_PRINC_STATEID,
99fe60d0
BH		 6579 };
6580 struct nfs41_exchange_id_res res = {
32b01310 6581 0
99fe60d0
BH		 6582 };
6583 int status;
6584 struct rpc_message msg = {
6585 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6586 .rpc_argp = &args,
6587 .rpc_resp = &res,
6588 .rpc_cred = cred,
6589 };
99fe60d0 6590
f092075d 6591 nfs4_init_boot_verifier(clp, &verifier);
e984a55a
CL		 6592 args.id_len = nfs4_init_uniform_client_string(clp, args.id,
6593 sizeof(args.id));
6bbb4ae8
CL		 6594 dprintk("NFS call exchange_id auth=%s, '%.*s'\n",
6595 clp->cl_rpcclient->cl_auth->au_ops->au_name,
6596 args.id_len, args.id);
99fe60d0 6597
acdeb69d 6598 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6599 GFP_NOFS);
acdeb69d 6600 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6601 status = -ENOMEM;
6602 goto out;
6603 }
78fe0f41 6604
79d4e1f0 6605 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6606 GFP_NOFS);
177313f1 6607 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6608 status = -ENOMEM;
acdeb69d 6609 goto out_server_owner;
abe9a6d5 6610 }
78fe0f41 6611
bbafffd2 6612 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6613 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6614 status = -ENOMEM;
6615 goto out_server_scope;
6616 }
6617
2031cd1a
WAA		 6618 switch (sp4_how) {
6619 case SP4_NONE:
6620 args.state_protect.how = SP4_NONE;
6621 break;
6622
6623 case SP4_MACH_CRED:
6624 args.state_protect = nfs4_sp4_mach_cred_request;
6625 break;
6626
6627 default:
6628 /* unsupported! */
6629 WARN_ON_ONCE(1);
6630 status = -EINVAL;
6631 goto out_server_scope;
6632 }
6633
1bd714f2 6634 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6635 trace_nfs4_exchange_id(clp, status);
177313f1 6636 if (status == 0)
32b01310 6637 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6638
2031cd1a
WAA		 6639 if (status == 0)
6640 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6641
acdeb69d 6642 if (status == 0) {
32b01310
TM		 6643 clp->cl_clientid = res.clientid;
6644 clp->cl_exchange_flags = (res.flags & ~EXCHGID4_FLAG_CONFIRMED_R);
6645 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R))
6646 clp->cl_seqid = res.seqid;
6647
acdeb69d
CL		 6648 kfree(clp->cl_serverowner);
6649 clp->cl_serverowner = res.server_owner;
6650 res.server_owner = NULL;
78fe0f41 6651
7d2ed9ac 6652 /* use the most recent implementation id */
59155546
CL		 6653 kfree(clp->cl_implid);
6654 clp->cl_implid = res.impl_id;
7d2ed9ac 6655
177313f1 6656 if (clp->cl_serverscope != NULL &&
79d4e1f0 6657 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 6658 res.server_scope)) {
6659 dprintk("%s: server_scope mismatch detected\n",
6660 __func__);
6661 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 6662 kfree(clp->cl_serverscope);
6663 clp->cl_serverscope = NULL;
78fe0f41
WAA		 6664 }
6665
177313f1 6666 if (clp->cl_serverscope == NULL) {
79d4e1f0 6667 clp->cl_serverscope = res.server_scope;
abe9a6d5
WAA		 6668 goto out;
6669 }
32b01310
TM		 6670 } else
6671 kfree(res.impl_id);
7d2ed9ac 6672
acdeb69d
CL		 6673out_server_owner:
6674 kfree(res.server_owner);
7d2ed9ac 6675out_server_scope:
abe9a6d5
WAA		 6676 kfree(res.server_scope);
6677out:
177313f1 6678 if (clp->cl_implid != NULL)
6bbb4ae8 6679 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 6680 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 6681 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 6682 clp->cl_implid->date.seconds,
6683 clp->cl_implid->date.nseconds);
6bbb4ae8 6684 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 6685 return status;
6686}
6687
2031cd1a
WAA		 6688/*
6689 * nfs4_proc_exchange_id()
6690 *
6691 * Returns zero, a negative errno, or a negative NFS4ERR status code.
6692 *
6693 * Since the clientid has expired, all compounds using sessions
6694 * associated with the stale clientid will be returning
6695 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
6696 * be in some phase of session reset.
6697 *
6698 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
6699 */
6700int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
6701{
6702 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
6703 int status;
6704
6705 /* try SP4_MACH_CRED if krb5i/p */
6706 if (authflavor == RPC_AUTH_GSS_KRB5I ||
6707 authflavor == RPC_AUTH_GSS_KRB5P) {
6708 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
6709 if (!status)
6710 return 0;
6711 }
6712
6713 /* try SP4_NONE */
6714 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
6715}
6716
66245539
TM		 6717static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
6718 struct rpc_cred *cred)
6719{
6720 struct rpc_message msg = {
6721 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
6722 .rpc_argp = clp,
6723 .rpc_cred = cred,
6724 };
6725 int status;
6726
6727 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6728 trace_nfs4_destroy_clientid(clp, status);
66245539 6729 if (status)
02c67525 6730 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 6731 "DESTROY_CLIENTID.", status, clp->cl_hostname);
6732 return status;
6733}
6734
6735static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
6736 struct rpc_cred *cred)
6737{
6738 unsigned int loop;
6739 int ret;
6740
6741 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
6742 ret = _nfs4_proc_destroy_clientid(clp, cred);
6743 switch (ret) {
6744 case -NFS4ERR_DELAY:
6745 case -NFS4ERR_CLIENTID_BUSY:
6746 ssleep(1);
6747 break;
6748 default:
6749 return ret;
6750 }
6751 }
6752 return 0;
6753}
6754
6755int nfs4_destroy_clientid(struct nfs_client *clp)
6756{
6757 struct rpc_cred *cred;
6758 int ret = 0;
6759
6760 if (clp->cl_mvops->minor_version < 1)
6761 goto out;
6762 if (clp->cl_exchange_flags == 0)
6763 goto out;
05f4c350
CL		 6764 if (clp->cl_preserve_clid)
6765 goto out;
73d8bde5 6766 cred = nfs4_get_clid_cred(clp);
66245539
TM		 6767 ret = nfs4_proc_destroy_clientid(clp, cred);
6768 if (cred)
6769 put_rpccred(cred);
6770 switch (ret) {
6771 case 0:
6772 case -NFS4ERR_STALE_CLIENTID:
6773 clp->cl_exchange_flags = 0;
6774 }
6775out:
6776 return ret;
6777}
6778
2050f0cc
AA		 6779struct nfs4_get_lease_time_data {
6780 struct nfs4_get_lease_time_args *args;
6781 struct nfs4_get_lease_time_res *res;
6782 struct nfs_client *clp;
6783};
6784
6785static void nfs4_get_lease_time_prepare(struct rpc_task *task,
6786 void *calldata)
6787{
2050f0cc
AA		 6788 struct nfs4_get_lease_time_data *data =
6789 (struct nfs4_get_lease_time_data *)calldata;
6790
6791 dprintk("--> %s\n", __func__);
6792 /* just setup sequence, do not trigger session recovery
6793 since we're invoked within one */
d9afbd1b
TM		 6794 nfs41_setup_sequence(data->clp->cl_session,
6795 &data->args->la_seq_args,
6796 &data->res->lr_seq_res,
6797 task);
2050f0cc
AA		 6798 dprintk("<-- %s\n", __func__);
6799}
6800
6801/*
6802 * Called from nfs4_state_manager thread for session setup, so don't recover
6803 * from sequence operation or clientid errors.
6804 */
6805static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
6806{
6807 struct nfs4_get_lease_time_data *data =
6808 (struct nfs4_get_lease_time_data *)calldata;
6809
6810 dprintk("--> %s\n", __func__);
14516c3a
TM		 6811 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
6812 return;
2050f0cc
AA		 6813 switch (task->tk_status) {
6814 case -NFS4ERR_DELAY:
6815 case -NFS4ERR_GRACE:
6816 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
6817 rpc_delay(task, NFS4_POLL_RETRY_MIN);
6818 task->tk_status = 0;
a8a4ae3a
AA		 6819 /* fall through */
6820 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 6821 rpc_restart_call_prepare(task);
2050f0cc
AA		 6822 return;
6823 }
2050f0cc
AA		 6824 dprintk("<-- %s\n", __func__);
6825}
6826
17280175 6827static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 6828 .rpc_call_prepare = nfs4_get_lease_time_prepare,
6829 .rpc_call_done = nfs4_get_lease_time_done,
6830};
6831
6832int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
6833{
6834 struct rpc_task *task;
6835 struct nfs4_get_lease_time_args args;
6836 struct nfs4_get_lease_time_res res = {
6837 .lr_fsinfo = fsinfo,
6838 };
6839 struct nfs4_get_lease_time_data data = {
6840 .args = &args,
6841 .res = &res,
6842 .clp = clp,
6843 };
6844 struct rpc_message msg = {
6845 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
6846 .rpc_argp = &args,
6847 .rpc_resp = &res,
6848 };
6849 struct rpc_task_setup task_setup = {
6850 .rpc_client = clp->cl_rpcclient,
6851 .rpc_message = &msg,
6852 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 6853 .callback_data = &data,
6854 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 6855 };
6856 int status;
6857
a9c92d6b 6858 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 6859 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 6860 dprintk("--> %s\n", __func__);
6861 task = rpc_run_task(&task_setup);
6862
6863 if (IS_ERR(task))
6864 status = PTR_ERR(task);
6865 else {
6866 status = task->tk_status;
6867 rpc_put_task(task);
6868 }
6869 dprintk("<-- %s return %d\n", __func__, status);
6870
6871 return status;
6872}
6873
fc931582
AA		 6874/*
6875 * Initialize the values to be used by the client in CREATE_SESSION
6876 * If nfs4_init_session set the fore channel request and response sizes,
6877 * use them.
6878 *
6879 * Set the back channel max_resp_sz_cached to zero to force the client to
6880 * always set csa_cachethis to FALSE because the current implementation
6881 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
6882 */
6883static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
6884{
18aad3d5
AA		 6885 unsigned int max_rqst_sz, max_resp_sz;
6886
6887 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
6888 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 6889
fc931582 6890 /* Fore channel attributes */
18aad3d5
AA		 6891 args->fc_attrs.max_rqst_sz = max_rqst_sz;
6892 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 6893 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 6894 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 6895
6896 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 6897 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 6898 __func__,
6899 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 6900 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 6901
6902 /* Back channel attributes */
fc931582
AA		 6903 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
6904 args->bc_attrs.max_resp_sz = PAGE_SIZE;
6905 args->bc_attrs.max_resp_sz_cached = 0;
6906 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
6907 args->bc_attrs.max_reqs = 1;
6908
6909 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
6910 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
6911 __func__,
6912 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
6913 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
6914 args->bc_attrs.max_reqs);
6915}
6916
43c2e885 6917static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
8d35301d 6918{
43c2e885
BF		 6919 struct nfs4_channel_attrs *sent = &args->fc_attrs;
6920 struct nfs4_channel_attrs *rcvd = &session->fc_attrs;
6921
43c2e885
BF		 6922 if (rcvd->max_resp_sz > sent->max_resp_sz)
6923 return -EINVAL;
6924 /*
6925 * Our requested max_ops is the minimum we need; we're not
6926 * prepared to break up compounds into smaller pieces than that.
6927 * So, no point even trying to continue if the server won't
6928 * cooperate:
6929 */
6930 if (rcvd->max_ops < sent->max_ops)
6931 return -EINVAL;
6932 if (rcvd->max_reqs == 0)
6933 return -EINVAL;
b4b9a0c1
VG		 6934 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
6935 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 6936 return 0;
8d35301d
AA		 6937}
6938
43c2e885
BF		 6939static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args, struct nfs4_session *session)
6940{
6941 struct nfs4_channel_attrs *sent = &args->bc_attrs;
6942 struct nfs4_channel_attrs *rcvd = &session->bc_attrs;
8d35301d 6943
43c2e885
BF		 6944 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
6945 return -EINVAL;
6946 if (rcvd->max_resp_sz < sent->max_resp_sz)
6947 return -EINVAL;
6948 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
6949 return -EINVAL;
6950 /* These would render the backchannel useless: */
b4b9a0c1 6951 if (rcvd->max_ops != sent->max_ops)
43c2e885 6952 return -EINVAL;
b4b9a0c1 6953 if (rcvd->max_reqs != sent->max_reqs)
43c2e885
BF		 6954 return -EINVAL;
6955 return 0;
6956}
8d35301d 6957
8d35301d
AA		 6958static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
6959 struct nfs4_session *session)
6960{
43c2e885 6961 int ret;
8d35301d 6962
43c2e885
BF		 6963 ret = nfs4_verify_fore_channel_attrs(args, session);
6964 if (ret)
6965 return ret;
6966 return nfs4_verify_back_channel_attrs(args, session);
8d35301d
AA		 6967}
6968
848f5bda
TM		 6969static int _nfs4_proc_create_session(struct nfs_client *clp,
6970 struct rpc_cred *cred)
fc931582
AA		 6971{
6972 struct nfs4_session *session = clp->cl_session;
6973 struct nfs41_create_session_args args = {
6974 .client = clp,
6975 .cb_program = NFS4_CALLBACK,
6976 };
6977 struct nfs41_create_session_res res = {
6978 .client = clp,
6979 };
6980 struct rpc_message msg = {
6981 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
6982 .rpc_argp = &args,
6983 .rpc_resp = &res,
848f5bda 6984 .rpc_cred = cred,
fc931582
AA		 6985 };
6986 int status;
6987
6988 nfs4_init_channel_attrs(&args);
0f91421e 6989 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 6990
1bd714f2 6991 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6992 trace_nfs4_create_session(clp, status);
fc931582 6993
43095d39 6994 if (!status) {
8d35301d
AA		 6995 /* Verify the session's negotiated channel_attrs values */
6996 status = nfs4_verify_channel_attrs(&args, session);
fc931582
AA		 6997 /* Increment the clientid slot sequence id */
6998 clp->cl_seqid++;
6999 }
7000
7001 return status;
7002}
7003
7004/*
7005 * Issues a CREATE_SESSION operation to the server.
7006 * It is the responsibility of the caller to verify the session is
7007 * expired before calling this routine.
7008 */
848f5bda 7009int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7010{
7011 int status;
7012 unsigned *ptr;
fc931582
AA		 7013 struct nfs4_session *session = clp->cl_session;
7014
7015 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7016
848f5bda 7017 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7018 if (status)
7019 goto out;
7020
aacd5537
AA		 7021 /* Init or reset the session slot tables */
7022 status = nfs4_setup_session_slot_tables(session);
7023 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7024 if (status)
7025 goto out;
7026
7027 ptr = (unsigned *)&session->sess_id.data[0];
7028 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7029 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7030out:
7031 dprintk("<-- %s\n", __func__);
7032 return status;
7033}
7034
0f3e66c6
AA		 7035/*
7036 * Issue the over-the-wire RPC DESTROY_SESSION.
7037 * The caller must serialize access to this routine.
7038 */
848f5bda
TM		 7039int nfs4_proc_destroy_session(struct nfs4_session *session,
7040 struct rpc_cred *cred)
0f3e66c6 7041{
848f5bda
TM		 7042 struct rpc_message msg = {
7043 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7044 .rpc_argp = session,
7045 .rpc_cred = cred,
7046 };
0f3e66c6 7047 int status = 0;
0f3e66c6
AA		 7048
7049 dprintk("--> nfs4_proc_destroy_session\n");
7050
7051 /* session is still being setup */
7052 if (session->clp->cl_cons_state != NFS_CS_READY)
7053 return status;
7054
1bd714f2 7055 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7056 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7057
7058 if (status)
08106ac7 7059 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7060 "Session has been destroyed regardless...\n", status);
7061
7062 dprintk("<-- nfs4_proc_destroy_session\n");
7063 return status;
7064}
7065
fc01cea9
AA		 7066/*
7067 * Renew the cl_session lease.
7068 */
d5f8d3fe
TM		 7069struct nfs4_sequence_data {
7070 struct nfs_client *clp;
7071 struct nfs4_sequence_args args;
7072 struct nfs4_sequence_res res;
7073};
7074
dc96aef9
AB		 7075static void nfs41_sequence_release(void *data)
7076{
d5f8d3fe
TM		 7077 struct nfs4_sequence_data *calldata = data;
7078 struct nfs_client *clp = calldata->clp;
dc96aef9 7079
7135840f
AB		 7080 if (atomic_read(&clp->cl_count) > 1)
7081 nfs4_schedule_state_renewal(clp);
7082 nfs_put_client(clp);
d5f8d3fe 7083 kfree(calldata);
dc96aef9
AB		 7084}
7085
aa5190d0
TM		 7086static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7087{
7088 switch(task->tk_status) {
7089 case -NFS4ERR_DELAY:
aa5190d0
TM		 7090 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7091 return -EAGAIN;
7092 default:
0400a6b0 7093 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7094 }
7095 return 0;
7096}
7097
dc96aef9 7098static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7099{
d5f8d3fe
TM		 7100 struct nfs4_sequence_data *calldata = data;
7101 struct nfs_client *clp = calldata->clp;
fc01cea9 7102
14516c3a
TM		 7103 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7104 return;
fc01cea9 7105
c6d01c6f 7106 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7107 if (task->tk_status < 0) {
7108 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7109 if (atomic_read(&clp->cl_count) == 1)
7110 goto out;
fc01cea9 7111
aa5190d0
TM		 7112 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7113 rpc_restart_call_prepare(task);
fc01cea9
AA		 7114 return;
7115 }
7116 }
fc01cea9 7117 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7118out:
fc01cea9
AA		 7119 dprintk("<-- %s\n", __func__);
7120}
7121
7122static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7123{
d5f8d3fe
TM		 7124 struct nfs4_sequence_data *calldata = data;
7125 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7126 struct nfs4_sequence_args *args;
7127 struct nfs4_sequence_res *res;
7128
fc01cea9
AA		 7129 args = task->tk_msg.rpc_argp;
7130 res = task->tk_msg.rpc_resp;
7131
d9afbd1b 7132 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7133}
7134
7135static const struct rpc_call_ops nfs41_sequence_ops = {
7136 .rpc_call_done = nfs41_sequence_call_done,
7137 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7138 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7139};
7140
8fe72bac
TM		 7141static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7142 struct rpc_cred *cred,
7143 bool is_privileged)
fc01cea9 7144{
d5f8d3fe 7145 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7146 struct rpc_message msg = {
7147 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7148 .rpc_cred = cred,
7149 };
71ac6da9
TM		 7150 struct rpc_task_setup task_setup_data = {
7151 .rpc_client = clp->cl_rpcclient,
7152 .rpc_message = &msg,
8fe72bac 7153 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7154 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7155 };
fc01cea9 7156
7135840f 7157 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7158 return ERR_PTR(-EIO);
dfb4f309 7159 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7160 if (calldata == NULL) {
7135840f 7161 nfs_put_client(clp);
71ac6da9 7162 return ERR_PTR(-ENOMEM);
fc01cea9 7163 }
a9c92d6b 7164 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7165 if (is_privileged)
7166 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7167 msg.rpc_argp = &calldata->args;
7168 msg.rpc_resp = &calldata->res;
7169 calldata->clp = clp;
71ac6da9 7170 task_setup_data.callback_data = calldata;
fc01cea9 7171
71ac6da9
TM		 7172 return rpc_run_task(&task_setup_data);
7173}
7174
2f60ea6b 7175static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7176{
7177 struct rpc_task *task;
7178 int ret = 0;
7179
2f60ea6b
TM		 7180 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
7181 return 0;
8fe72bac 7182 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7183 if (IS_ERR(task))
7184 ret = PTR_ERR(task);
7185 else
bf294b41 7186 rpc_put_task_async(task);
71ac6da9
TM		 7187 dprintk("<-- %s status=%d\n", __func__, ret);
7188 return ret;
7189}
7190
7191static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7192{
7193 struct rpc_task *task;
7194 int ret;
7195
8fe72bac 7196 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7197 if (IS_ERR(task)) {
7198 ret = PTR_ERR(task);
7199 goto out;
7200 }
7201 ret = rpc_wait_for_completion_task(task);
b4410c2f
TM		 7202 if (!ret) {
7203 struct nfs4_sequence_res *res = task->tk_msg.rpc_resp;
7204
7205 if (task->tk_status == 0)
7206 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
71ac6da9 7207 ret = task->tk_status;
b4410c2f 7208 }
71ac6da9
TM		 7209 rpc_put_task(task);
7210out:
7211 dprintk("<-- %s status=%d\n", __func__, ret);
7212 return ret;
fc01cea9
AA		 7213}
7214
fce5c838
RL		 7215struct nfs4_reclaim_complete_data {
7216 struct nfs_client *clp;
7217 struct nfs41_reclaim_complete_args arg;
7218 struct nfs41_reclaim_complete_res res;
7219};
7220
7221static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7222{
7223 struct nfs4_reclaim_complete_data *calldata = data;
7224
d9afbd1b
TM		 7225 nfs41_setup_sequence(calldata->clp->cl_session,
7226 &calldata->arg.seq_args,
7227 &calldata->res.seq_res,
7228 task);
fce5c838
RL		 7229}
7230
aa5190d0
TM		 7231static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7232{
7233 switch(task->tk_status) {
7234 case 0:
7235 case -NFS4ERR_COMPLETE_ALREADY:
7236 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7237 break;
7238 case -NFS4ERR_DELAY:
aa5190d0 7239 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7240 /* fall through */
7241 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7242 return -EAGAIN;
7243 default:
0400a6b0 7244 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7245 }
7246 return 0;
7247}
7248
fce5c838
RL		 7249static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7250{
7251 struct nfs4_reclaim_complete_data *calldata = data;
7252 struct nfs_client *clp = calldata->clp;
7253 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7254
7255 dprintk("--> %s\n", __func__);
14516c3a
TM		 7256 if (!nfs41_sequence_done(task, res))
7257 return;
fce5c838 7258
c6d01c6f 7259 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7260 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7261 rpc_restart_call_prepare(task);
7262 return;
7263 }
fce5c838
RL		 7264 dprintk("<-- %s\n", __func__);
7265}
7266
7267static void nfs4_free_reclaim_complete_data(void *data)
7268{
7269 struct nfs4_reclaim_complete_data *calldata = data;
7270
7271 kfree(calldata);
7272}
7273
7274static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7275 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7276 .rpc_call_done = nfs4_reclaim_complete_done,
7277 .rpc_release = nfs4_free_reclaim_complete_data,
7278};
7279
7280/*
7281 * Issue a global reclaim complete.
7282 */
965e9c23
TM		 7283static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7284 struct rpc_cred *cred)
fce5c838
RL		 7285{
7286 struct nfs4_reclaim_complete_data *calldata;
7287 struct rpc_task *task;
7288 struct rpc_message msg = {
7289 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7290 .rpc_cred = cred,
fce5c838
RL		 7291 };
7292 struct rpc_task_setup task_setup_data = {
7293 .rpc_client = clp->cl_rpcclient,
7294 .rpc_message = &msg,
7295 .callback_ops = &nfs4_reclaim_complete_call_ops,
7296 .flags = RPC_TASK_ASYNC,
7297 };
7298 int status = -ENOMEM;
7299
7300 dprintk("--> %s\n", __func__);
8535b2be 7301 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7302 if (calldata == NULL)
7303 goto out;
7304 calldata->clp = clp;
7305 calldata->arg.one_fs = 0;
fce5c838 7306
a9c92d6b 7307 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7308 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7309 msg.rpc_argp = &calldata->arg;
7310 msg.rpc_resp = &calldata->res;
7311 task_setup_data.callback_data = calldata;
7312 task = rpc_run_task(&task_setup_data);
acf82b85 7313 if (IS_ERR(task)) {
fce5c838 7314 status = PTR_ERR(task);
acf82b85
DC		 7315 goto out;
7316 }
c34c32ea
AA		 7317 status = nfs4_wait_for_completion_rpc_task(task);
7318 if (status == 0)
7319 status = task->tk_status;
fce5c838 7320 rpc_put_task(task);
acf82b85 7321 return 0;
fce5c838
RL		 7322out:
7323 dprintk("<-- %s status=%d\n", __func__, status);
7324 return status;
7325}
b1f69b75
AA		 7326
7327static void
7328nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7329{
7330 struct nfs4_layoutget *lgp = calldata;
c31663d4 7331 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7332 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7333
7334 dprintk("--> %s\n", __func__);
c31663d4
FI		 7335 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7336 * right now covering the LAYOUTGET we are about to send.
7337 * However, that is not so catastrophic, and there seems
7338 * to be no way to prevent it completely.
7339 */
6ba7db34 7340 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7341 &lgp->res.seq_res, task))
b1f69b75 7342 return;
cf7d63f1
FI		 7343 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7344 NFS_I(lgp->args.inode)->layout,
7345 lgp->args.ctx->state)) {
7346 rpc_exit(task, NFS4_OK);
cf7d63f1 7347 }
b1f69b75
AA		 7348}
7349
7350static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7351{
7352 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7353 struct inode *inode = lgp->args.inode;
7354 struct nfs_server *server = NFS_SERVER(inode);
7355 struct pnfs_layout_hdr *lo;
7356 struct nfs4_state *state = NULL;
30005121 7357 unsigned long timeo, giveup;
b1f69b75
AA		 7358
7359 dprintk("--> %s\n", __func__);
7360
6ba7db34 7361 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7362 goto out;
b1f69b75
AA		 7363
7364 switch (task->tk_status) {
7365 case 0:
ee314c2a 7366 goto out;
b1f69b75
AA		 7367 case -NFS4ERR_LAYOUTTRYLATER:
7368 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7369 timeo = rpc_get_timeout(task->tk_client);
7370 giveup = lgp->args.timestamp + timeo;
7371 if (time_after(giveup, jiffies))
7372 task->tk_status = -NFS4ERR_DELAY;
ee314c2a
TM		 7373 break;
7374 case -NFS4ERR_EXPIRED:
7375 case -NFS4ERR_BAD_STATEID:
7376 spin_lock(&inode->i_lock);
7377 lo = NFS_I(inode)->layout;
7378 if (!lo || list_empty(&lo->plh_segs)) {
7379 spin_unlock(&inode->i_lock);
7380 /* If the open stateid was bad, then recover it. */
7381 state = lgp->args.ctx->state;
7382 } else {
7383 LIST_HEAD(head);
7384
7385 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7386 spin_unlock(&inode->i_lock);
7387 /* Mark the bad layout state as invalid, then
7388 * retry using the open stateid. */
7389 pnfs_free_lseg_list(&head);
b1f69b75
AA		 7390 }
7391 }
ee314c2a
TM		 7392 if (nfs4_async_handle_error(task, server, state) == -EAGAIN)
7393 rpc_restart_call_prepare(task);
7394out:
b1f69b75
AA		 7395 dprintk("<-- %s\n", __func__);
7396}
7397
8554116e
IK		 7398static size_t max_response_pages(struct nfs_server *server)
7399{
7400 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7401 return nfs_page_array_len(0, max_resp_sz);
7402}
7403
7404static void nfs4_free_pages(struct page **pages, size_t size)
7405{
7406 int i;
7407
7408 if (!pages)
7409 return;
7410
7411 for (i = 0; i < size; i++) {
7412 if (!pages[i])
7413 break;
7414 __free_page(pages[i]);
7415 }
7416 kfree(pages);
7417}
7418
7419static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7420{
7421 struct page **pages;
7422 int i;
7423
7424 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7425 if (!pages) {
7426 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7427 return NULL;
7428 }
7429
7430 for (i = 0; i < size; i++) {
7431 pages[i] = alloc_page(gfp_flags);
7432 if (!pages[i]) {
7433 dprintk("%s: failed to allocate page\n", __func__);
7434 nfs4_free_pages(pages, size);
7435 return NULL;
7436 }
7437 }
7438
7439 return pages;
7440}
7441
b1f69b75
AA		 7442static void nfs4_layoutget_release(void *calldata)
7443{
7444 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7445 struct inode *inode = lgp->args.inode;
7446 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7447 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7448
7449 dprintk("--> %s\n", __func__);
8554116e 7450 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7451 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7452 put_nfs_open_context(lgp->args.ctx);
7453 kfree(calldata);
7454 dprintk("<-- %s\n", __func__);
7455}
7456
7457static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7458 .rpc_call_prepare = nfs4_layoutget_prepare,
7459 .rpc_call_done = nfs4_layoutget_done,
7460 .rpc_release = nfs4_layoutget_release,
7461};
7462
a0b0a6e3
TM		 7463struct pnfs_layout_segment *
7464nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7465{
a47970ff
WAA		 7466 struct inode *inode = lgp->args.inode;
7467 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7468 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7469 struct rpc_task *task;
7470 struct rpc_message msg = {
7471 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7472 .rpc_argp = &lgp->args,
7473 .rpc_resp = &lgp->res,
6ab59344 7474 .rpc_cred = lgp->cred,
b1f69b75
AA		 7475 };
7476 struct rpc_task_setup task_setup_data = {
7477 .rpc_client = server->client,
7478 .rpc_message = &msg,
7479 .callback_ops = &nfs4_layoutget_call_ops,
7480 .callback_data = lgp,
7481 .flags = RPC_TASK_ASYNC,
7482 };
a0b0a6e3 7483 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7484 int status = 0;
7485
7486 dprintk("--> %s\n", __func__);
7487
8554116e
IK		 7488 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7489 if (!lgp->args.layout.pages) {
7490 nfs4_layoutget_release(lgp);
a0b0a6e3 7491 return ERR_PTR(-ENOMEM);
8554116e
IK		 7492 }
7493 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7494 lgp->args.timestamp = jiffies;
8554116e 7495
35124a09 7496 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7497 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7498 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff
WAA		 7499
7500 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7501 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7502
b1f69b75
AA		 7503 task = rpc_run_task(&task_setup_data);
7504 if (IS_ERR(task))
a0b0a6e3 7505 return ERR_CAST(task);
b1f69b75 7506 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7507 if (status == 0)
7508 status = task->tk_status;
1037e6ea
TM		 7509 trace_nfs4_layoutget(lgp->args.ctx,
7510 &lgp->args.range,
7511 &lgp->res.range,
7512 status);
085b7a45
WAA		 7513 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7514 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7515 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7516 rpc_put_task(task);
7517 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7518 if (status)
7519 return ERR_PTR(status);
7520 return lseg;
b1f69b75
AA		 7521}
7522
cbe82603
BH		 7523static void
7524nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7525{
7526 struct nfs4_layoutreturn *lrp = calldata;
7527
7528 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7529 nfs41_setup_sequence(lrp->clp->cl_session,
7530 &lrp->args.seq_args,
7531 &lrp->res.seq_res,
7532 task);
cbe82603
BH		 7533}
7534
7535static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7536{
7537 struct nfs4_layoutreturn *lrp = calldata;
7538 struct nfs_server *server;
7539
7540 dprintk("--> %s\n", __func__);
7541
6ba7db34 7542 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7543 return;
7544
7545 server = NFS_SERVER(lrp->args.inode);
7546 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
d00c5d43 7547 rpc_restart_call_prepare(task);
cbe82603
BH		 7548 return;
7549 }
cbe82603
BH		 7550 dprintk("<-- %s\n", __func__);
7551}
7552
7553static void nfs4_layoutreturn_release(void *calldata)
7554{
7555 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7556 struct pnfs_layout_hdr *lo = lrp->args.layout;
cbe82603
BH		 7557
7558 dprintk("--> %s\n", __func__);
849b286f
TM		 7559 spin_lock(&lo->plh_inode->i_lock);
7560 if (lrp->res.lrs_present)
7561 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
7562 lo->plh_block_lgets--;
7563 spin_unlock(&lo->plh_inode->i_lock);
70c3bd2b 7564 pnfs_put_layout_hdr(lrp->args.layout);
cbe82603
BH		 7565 kfree(calldata);
7566 dprintk("<-- %s\n", __func__);
7567}
7568
7569static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7570 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7571 .rpc_call_done = nfs4_layoutreturn_done,
7572 .rpc_release = nfs4_layoutreturn_release,
7573};
7574
7575int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp)
7576{
7577 struct rpc_task *task;
7578 struct rpc_message msg = {
7579 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
7580 .rpc_argp = &lrp->args,
7581 .rpc_resp = &lrp->res,
9556000d 7582 .rpc_cred = lrp->cred,
cbe82603
BH		 7583 };
7584 struct rpc_task_setup task_setup_data = {
1771c577 7585 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 7586 .rpc_message = &msg,
7587 .callback_ops = &nfs4_layoutreturn_call_ops,
7588 .callback_data = lrp,
7589 };
7590 int status;
7591
7592 dprintk("--> %s\n", __func__);
a9c92d6b 7593 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 7594 task = rpc_run_task(&task_setup_data);
7595 if (IS_ERR(task))
7596 return PTR_ERR(task);
7597 status = task->tk_status;
1037e6ea 7598 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 7599 dprintk("<-- %s status=%d\n", __func__, status);
7600 rpc_put_task(task);
7601 return status;
7602}
7603
7f11d8d3
AA		 7604/*
7605 * Retrieve the list of Data Server devices from the MDS.
7606 */
7607static int _nfs4_getdevicelist(struct nfs_server *server,
7608 const struct nfs_fh *fh,
7609 struct pnfs_devicelist *devlist)
7610{
7611 struct nfs4_getdevicelist_args args = {
7612 .fh = fh,
7613 .layoutclass = server->pnfs_curr_ld->id,
7614 };
7615 struct nfs4_getdevicelist_res res = {
7616 .devlist = devlist,
7617 };
7618 struct rpc_message msg = {
7619 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICELIST],
7620 .rpc_argp = &args,
7621 .rpc_resp = &res,
7622 };
7623 int status;
7624
7625 dprintk("--> %s\n", __func__);
7626 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args,
7627 &res.seq_res, 0);
7628 dprintk("<-- %s status=%d\n", __func__, status);
7629 return status;
7630}
7631
7632int nfs4_proc_getdevicelist(struct nfs_server *server,
7633 const struct nfs_fh *fh,
7634 struct pnfs_devicelist *devlist)
7635{
7636 struct nfs4_exception exception = { };
7637 int err;
7638
7639 do {
7640 err = nfs4_handle_exception(server,
7641 _nfs4_getdevicelist(server, fh, devlist),
7642 &exception);
7643 } while (exception.retry);
7644
7645 dprintk("%s: err=%d, num_devs=%u\n", __func__,
7646 err, devlist->num_devs);
7647
7648 return err;
7649}
7650EXPORT_SYMBOL_GPL(nfs4_proc_getdevicelist);
7651
b1f69b75 7652static int
cd5875fe
TM		 7653_nfs4_proc_getdeviceinfo(struct nfs_server *server,
7654 struct pnfs_device *pdev,
7655 struct rpc_cred *cred)
b1f69b75
AA		 7656{
7657 struct nfs4_getdeviceinfo_args args = {
7658 .pdev = pdev,
7659 };
7660 struct nfs4_getdeviceinfo_res res = {
7661 .pdev = pdev,
7662 };
7663 struct rpc_message msg = {
7664 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
7665 .rpc_argp = &args,
7666 .rpc_resp = &res,
cd5875fe 7667 .rpc_cred = cred,
b1f69b75
AA		 7668 };
7669 int status;
7670
7671 dprintk("--> %s\n", __func__);
7c513058 7672 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
b1f69b75
AA		 7673 dprintk("<-- %s status=%d\n", __func__, status);
7674
7675 return status;
7676}
7677
cd5875fe
TM		 7678int nfs4_proc_getdeviceinfo(struct nfs_server *server,
7679 struct pnfs_device *pdev,
7680 struct rpc_cred *cred)
b1f69b75
AA		 7681{
7682 struct nfs4_exception exception = { };
7683 int err;
7684
7685 do {
7686 err = nfs4_handle_exception(server,
cd5875fe 7687 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 7688 &exception);
7689 } while (exception.retry);
7690 return err;
7691}
7692EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
7693
863a3c6c
AA		 7694static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
7695{
7696 struct nfs4_layoutcommit_data *data = calldata;
7697 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 7698 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 7699
d9afbd1b
TM		 7700 nfs41_setup_sequence(session,
7701 &data->args.seq_args,
7702 &data->res.seq_res,
7703 task);
863a3c6c
AA		 7704}
7705
7706static void
7707nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
7708{
7709 struct nfs4_layoutcommit_data *data = calldata;
7710 struct nfs_server *server = NFS_SERVER(data->args.inode);
7711
6ba7db34 7712 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 7713 return;
7714
7715 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 7716 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
7717 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
7718 case -NFS4ERR_BADLAYOUT: /* no layout */
7719 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 7720 task->tk_status = 0;
e59d27e0
TM		 7721 break;
7722 case 0:
863a3c6c
AA		 7723 nfs_post_op_update_inode_force_wcc(data->args.inode,
7724 data->res.fattr);
e59d27e0
TM		 7725 break;
7726 default:
7727 if (nfs4_async_handle_error(task, server, NULL) == -EAGAIN) {
7728 rpc_restart_call_prepare(task);
7729 return;
7730 }
7731 }
863a3c6c
AA		 7732}
7733
7734static void nfs4_layoutcommit_release(void *calldata)
7735{
7736 struct nfs4_layoutcommit_data *data = calldata;
7737
db29c089 7738 pnfs_cleanup_layoutcommit(data);
863a3c6c
AA		 7739 put_rpccred(data->cred);
7740 kfree(data);
7741}
7742
7743static const struct rpc_call_ops nfs4_layoutcommit_ops = {
7744 .rpc_call_prepare = nfs4_layoutcommit_prepare,
7745 .rpc_call_done = nfs4_layoutcommit_done,
7746 .rpc_release = nfs4_layoutcommit_release,
7747};
7748
7749int
ef311537 7750nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 7751{
7752 struct rpc_message msg = {
7753 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
7754 .rpc_argp = &data->args,
7755 .rpc_resp = &data->res,
7756 .rpc_cred = data->cred,
7757 };
7758 struct rpc_task_setup task_setup_data = {
7759 .task = &data->task,
7760 .rpc_client = NFS_CLIENT(data->args.inode),
7761 .rpc_message = &msg,
7762 .callback_ops = &nfs4_layoutcommit_ops,
7763 .callback_data = data,
7764 .flags = RPC_TASK_ASYNC,
7765 };
7766 struct rpc_task *task;
7767 int status = 0;
7768
7769 dprintk("NFS: %4d initiating layoutcommit call. sync %d "
7770 "lbw: %llu inode %lu\n",
7771 data->task.tk_pid, sync,
7772 data->args.lastbytewritten,
7773 data->args.inode->i_ino);
7774
a9c92d6b 7775 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 7776 task = rpc_run_task(&task_setup_data);
7777 if (IS_ERR(task))
7778 return PTR_ERR(task);
ef311537 7779 if (sync == false)
863a3c6c
AA		 7780 goto out;
7781 status = nfs4_wait_for_completion_rpc_task(task);
7782 if (status != 0)
7783 goto out;
7784 status = task->tk_status;
1037e6ea 7785 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 7786out:
7787 dprintk("%s: status %d\n", __func__, status);
7788 rpc_put_task(task);
7789 return status;
7790}
fca78d6d 7791
97431204
AA		 7792/**
7793 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
7794 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
7795 */
fca78d6d
BS		 7796static int
7797_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 7798 struct nfs_fsinfo *info,
7799 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 7800{
7801 struct nfs41_secinfo_no_name_args args = {
7802 .style = SECINFO_STYLE_CURRENT_FH,
7803 };
7804 struct nfs4_secinfo_res res = {
7805 .flavors = flavors,
7806 };
7807 struct rpc_message msg = {
7808 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
7809 .rpc_argp = &args,
7810 .rpc_resp = &res,
7811 };
b1b3e136 7812 struct rpc_clnt *clnt = server->client;
7cb852df 7813 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 7814 int status;
7815
7816 if (use_integrity) {
7817 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 7818 cred = nfs4_get_clid_cred(server->nfs_client);
7819 msg.rpc_cred = cred;
b1b3e136
WAA		 7820 }
7821
7822 dprintk("--> %s\n", __func__);
7823 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
7824 &res.seq_res, 0);
7825 dprintk("<-- %s status=%d\n", __func__, status);
7826
7cb852df
WAA		 7827 if (cred)
7828 put_rpccred(cred);
b1b3e136
WAA		 7829
7830 return status;
fca78d6d
BS		 7831}
7832
7833static int
7834nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
7835 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
7836{
7837 struct nfs4_exception exception = { };
7838 int err;
7839 do {
b1b3e136
WAA		 7840 /* first try using integrity protection */
7841 err = -NFS4ERR_WRONGSEC;
7842
7843 /* try to use integrity protection with machine cred */
7844 if (_nfs4_is_integrity_protected(server->nfs_client))
7845 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
7846 flavors, true);
7847
7848 /*
7849 * if unable to use integrity protection, or SECINFO with
7850 * integrity protection returns NFS4ERR_WRONGSEC (which is
7851 * disallowed by spec, but exists in deployed servers) use
7852 * the current filesystem's rpc_client and the user cred.
7853 */
7854 if (err == -NFS4ERR_WRONGSEC)
7855 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
7856 flavors, false);
7857
fca78d6d
BS		 7858 switch (err) {
7859 case 0:
7860 case -NFS4ERR_WRONGSEC:
7861 case -NFS4ERR_NOTSUPP:
05e9cfb4 7862 goto out;
fca78d6d
BS		 7863 default:
7864 err = nfs4_handle_exception(server, err, &exception);
7865 }
7866 } while (exception.retry);
05e9cfb4 7867out:
fca78d6d
BS		 7868 return err;
7869}
7870
7871static int
7872nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
7873 struct nfs_fsinfo *info)
7874{
7875 int err;
7876 struct page *page;
367156d9 7877 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 7878 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 7879 struct nfs4_secinfo4 *secinfo;
7880 int i;
fca78d6d
BS		 7881
7882 page = alloc_page(GFP_KERNEL);
7883 if (!page) {
7884 err = -ENOMEM;
7885 goto out;
7886 }
7887
7888 flavors = page_address(page);
7889 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
7890
7891 /*
7892 * Fall back on "guess and check" method if
7893 * the server doesn't support SECINFO_NO_NAME
7894 */
7895 if (err == -NFS4ERR_WRONGSEC || err == -NFS4ERR_NOTSUPP) {
7896 err = nfs4_find_root_sec(server, fhandle, info);
7897 goto out_freepage;
7898 }
7899 if (err)
7900 goto out_freepage;
7901
58a8cf12
WAA		 7902 for (i = 0; i < flavors->num_flavors; i++) {
7903 secinfo = &flavors->flavors[i];
7904
7905 switch (secinfo->flavor) {
7906 case RPC_AUTH_NULL:
7907 case RPC_AUTH_UNIX:
7908 case RPC_AUTH_GSS:
7909 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
7910 &secinfo->flavor_info);
7911 break;
7912 default:
7913 flavor = RPC_AUTH_MAXFLAVOR;
7914 break;
7915 }
7916
7917 if (flavor != RPC_AUTH_MAXFLAVOR) {
7918 err = nfs4_lookup_root_sec(server, fhandle,
7919 info, flavor);
7920 if (!err)
7921 break;
7922 }
7923 }
7924
7925 if (flavor == RPC_AUTH_MAXFLAVOR)
7926 err = -EPERM;
fca78d6d
BS		 7927
7928out_freepage:
7929 put_page(page);
7930 if (err == -EACCES)
7931 return -EPERM;
7932out:
7933 return err;
7934}
1cab0652 7935
ab7cb0df
TM		 7936static int _nfs41_test_stateid(struct nfs_server *server,
7937 nfs4_stateid *stateid,
7938 struct rpc_cred *cred)
7d974794
BS		 7939{
7940 int status;
7941 struct nfs41_test_stateid_args args = {
1cab0652 7942 .stateid = stateid,
7d974794
BS		 7943 };
7944 struct nfs41_test_stateid_res res;
7945 struct rpc_message msg = {
7946 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
7947 .rpc_argp = &args,
7948 .rpc_resp = &res,
ab7cb0df 7949 .rpc_cred = cred,
7d974794 7950 };
3787d506
WAA		 7951 struct rpc_clnt *rpc_client = server->client;
7952
7953 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
7954 &rpc_client, &msg);
1cab0652 7955
38527b15 7956 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 7957 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 7958 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 7959 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 7960 &args.seq_args, &res.seq_res);
38527b15
CL		 7961 if (status != NFS_OK) {
7962 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 7963 return status;
38527b15
CL		 7964 }
7965 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 7966 return -res.status;
7d974794
BS		 7967}
7968
38527b15
CL		 7969/**
7970 * nfs41_test_stateid - perform a TEST_STATEID operation
7971 *
7972 * @server: server / transport on which to perform the operation
7973 * @stateid: state ID to test
ab7cb0df 7974 * @cred: credential
38527b15
CL		 7975 *
7976 * Returns NFS_OK if the server recognizes that "stateid" is valid.
7977 * Otherwise a negative NFS4ERR value is returned if the operation
7978 * failed or the state ID is not currently valid.
7979 */
ab7cb0df
TM		 7980static int nfs41_test_stateid(struct nfs_server *server,
7981 nfs4_stateid *stateid,
7982 struct rpc_cred *cred)
7d974794
BS		 7983{
7984 struct nfs4_exception exception = { };
7985 int err;
7986 do {
ab7cb0df 7987 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 7988 if (err != -NFS4ERR_DELAY)
7989 break;
7990 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 7991 } while (exception.retry);
7992 return err;
7993}
9aeda35f 7994
7c1d5fae
TM		 7995struct nfs_free_stateid_data {
7996 struct nfs_server *server;
7997 struct nfs41_free_stateid_args args;
9aeda35f 7998 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 7999};
8000
8001static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8002{
8003 struct nfs_free_stateid_data *data = calldata;
8004 nfs41_setup_sequence(nfs4_get_session(data->server),
8005 &data->args.seq_args,
8006 &data->res.seq_res,
8007 task);
8008}
8009
8010static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8011{
8012 struct nfs_free_stateid_data *data = calldata;
8013
8014 nfs41_sequence_done(task, &data->res.seq_res);
8015
8016 switch (task->tk_status) {
8017 case -NFS4ERR_DELAY:
8018 if (nfs4_async_handle_error(task, data->server, NULL) == -EAGAIN)
8019 rpc_restart_call_prepare(task);
8020 }
8021}
8022
8023static void nfs41_free_stateid_release(void *calldata)
8024{
8025 kfree(calldata);
8026}
8027
17f26b12 8028static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8029 .rpc_call_prepare = nfs41_free_stateid_prepare,
8030 .rpc_call_done = nfs41_free_stateid_done,
8031 .rpc_release = nfs41_free_stateid_release,
8032};
8033
8034static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8035 nfs4_stateid *stateid,
ab7cb0df 8036 struct rpc_cred *cred,
7c1d5fae
TM		 8037 bool privileged)
8038{
9aeda35f
BS		 8039 struct rpc_message msg = {
8040 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8041 .rpc_cred = cred,
9aeda35f 8042 };
7c1d5fae
TM		 8043 struct rpc_task_setup task_setup = {
8044 .rpc_client = server->client,
8045 .rpc_message = &msg,
8046 .callback_ops = &nfs41_free_stateid_ops,
8047 .flags = RPC_TASK_ASYNC,
8048 };
8049 struct nfs_free_stateid_data *data;
9aeda35f 8050
3787d506
WAA		 8051 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8052 &task_setup.rpc_client, &msg);
8053
38527b15 8054 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8055 data = kmalloc(sizeof(*data), GFP_NOFS);
8056 if (!data)
8057 return ERR_PTR(-ENOMEM);
8058 data->server = server;
8059 nfs4_stateid_copy(&data->args.stateid, stateid);
8060
8061 task_setup.callback_data = data;
8062
8063 msg.rpc_argp = &data->args;
8064 msg.rpc_resp = &data->res;
a9c92d6b 8065 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8066 if (privileged)
8067 nfs4_set_sequence_privileged(&data->args.seq_args);
8068
8069 return rpc_run_task(&task_setup);
9aeda35f
BS		 8070}
8071
38527b15
CL		 8072/**
8073 * nfs41_free_stateid - perform a FREE_STATEID operation
8074 *
8075 * @server: server / transport on which to perform the operation
8076 * @stateid: state ID to release
ab7cb0df 8077 * @cred: credential
38527b15
CL		 8078 *
8079 * Returns NFS_OK if the server freed "stateid". Otherwise a
8080 * negative NFS4ERR value is returned.
8081 */
ab7cb0df
TM		 8082static int nfs41_free_stateid(struct nfs_server *server,
8083 nfs4_stateid *stateid,
8084 struct rpc_cred *cred)
9aeda35f 8085{
7c1d5fae
TM		 8086 struct rpc_task *task;
8087 int ret;
8088
ab7cb0df 8089 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8090 if (IS_ERR(task))
8091 return PTR_ERR(task);
8092 ret = rpc_wait_for_completion_task(task);
8093 if (!ret)
8094 ret = task->tk_status;
8095 rpc_put_task(task);
8096 return ret;
9aeda35f 8097}
36281caa 8098
c8b2d0bf
TM		 8099static int nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
8100{
8101 struct rpc_task *task;
ab7cb0df 8102 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8103
ab7cb0df 8104 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8105 nfs4_free_lock_state(server, lsp);
8106 if (IS_ERR(task))
8107 return PTR_ERR(task);
8108 rpc_put_task(task);
8109 return 0;
8110}
8111
36281caa
TM		 8112static bool nfs41_match_stateid(const nfs4_stateid *s1,
8113 const nfs4_stateid *s2)
8114{
2d2f24ad 8115 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8116 return false;
8117
2d2f24ad 8118 if (s1->seqid == s2->seqid)
36281caa 8119 return true;
2d2f24ad 8120 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8121 return true;
8122
8123 return false;
8124}
8125
557134a3
AA		 8126#endif /* CONFIG_NFS_V4_1 */
8127
36281caa
TM		 8128static bool nfs4_match_stateid(const nfs4_stateid *s1,
8129 const nfs4_stateid *s2)
8130{
f597c537 8131 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8132}
8133
8134
17280175 8135static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8136 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8137 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8138 .recover_open = nfs4_open_reclaim,
8139 .recover_lock = nfs4_lock_reclaim,
591d71cb 8140 .establish_clid = nfs4_init_clientid,
05f4c350 8141 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8142};
8143
591d71cb 8144#if defined(CONFIG_NFS_V4_1)
17280175 8145static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8146 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8147 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8148 .recover_open = nfs4_open_reclaim,
8149 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8150 .establish_clid = nfs41_init_clientid,
fce5c838 8151 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8152 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8153};
8154#endif /* CONFIG_NFS_V4_1 */
8155
17280175 8156static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8157 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8158 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
8159 .recover_open = nfs4_open_expired,
8160 .recover_lock = nfs4_lock_expired,
8161 .establish_clid = nfs4_init_clientid,
8162};
8163
8164#if defined(CONFIG_NFS_V4_1)
17280175 8165static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8166 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8167 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8168 .recover_open = nfs41_open_expired,
8169 .recover_lock = nfs41_lock_expired,
4d643d1d 8170 .establish_clid = nfs41_init_clientid,
1da177e4 8171};
591d71cb 8172#endif /* CONFIG_NFS_V4_1 */
1da177e4 8173
17280175 8174static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8175 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8176 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8177 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8178};
8179
8180#if defined(CONFIG_NFS_V4_1)
17280175 8181static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8182 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8183 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8184 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8185};
8186#endif
8187
ec011fe8 8188static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8189 .get_locations = _nfs40_proc_get_locations,
44c99933 8190 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8191};
8192
8193#if defined(CONFIG_NFS_V4_1)
8194static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8195 .get_locations = _nfs41_proc_get_locations,
44c99933 8196 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8197};
8198#endif /* CONFIG_NFS_V4_1 */
8199
97dc1359
TM		 8200static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8201 .minor_version = 0,
39c6daae
TM		 8202 .init_caps = NFS_CAP_READDIRPLUS
8203 | NFS_CAP_ATOMIC_OPEN
8204 | NFS_CAP_CHANGE_ATTR
8205 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8206 .init_client = nfs40_init_client,
8207 .shutdown_client = nfs40_shutdown_client,
36281caa 8208 .match_stateid = nfs4_match_stateid,
fca78d6d 8209 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8210 .free_lock_state = nfs4_release_lockowner,
9915ea7e 8211 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8212 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8213 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8214 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8215 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8216};
8217
8218#if defined(CONFIG_NFS_V4_1)
8219static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8220 .minor_version = 1,
39c6daae
TM		 8221 .init_caps = NFS_CAP_READDIRPLUS
8222 | NFS_CAP_ATOMIC_OPEN
8223 | NFS_CAP_CHANGE_ATTR
3b66486c 8224 | NFS_CAP_POSIX_LOCK
49f9a0fa
TM		 8225 | NFS_CAP_STATEID_NFSV41
8226 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8227 .init_client = nfs41_init_client,
8228 .shutdown_client = nfs41_shutdown_client,
36281caa 8229 .match_stateid = nfs41_match_stateid,
fca78d6d 8230 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8231 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8232 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8233 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8234 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8235 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8236 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8237};
8238#endif
8239
42c2c424
SD		 8240#if defined(CONFIG_NFS_V4_2)
8241static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8242 .minor_version = 2,
7017310a
BS		 8243 .init_caps = NFS_CAP_READDIRPLUS
8244 | NFS_CAP_ATOMIC_OPEN
8245 | NFS_CAP_CHANGE_ATTR
8246 | NFS_CAP_POSIX_LOCK
8247 | NFS_CAP_STATEID_NFSV41
8248 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8249 .init_client = nfs41_init_client,
8250 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8251 .match_stateid = nfs41_match_stateid,
8252 .find_root_sec = nfs41_find_root_sec,
7017310a 8253 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8254 .call_sync_ops = &nfs41_call_sync_ops,
42c2c424
SD		 8255 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8256 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8257 .state_renewal_ops = &nfs41_state_renewal_ops,
8258};
8259#endif
8260
97dc1359
TM		 8261const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8262 [0] = &nfs_v4_0_minor_ops,
8263#if defined(CONFIG_NFS_V4_1)
8264 [1] = &nfs_v4_1_minor_ops,
8265#endif
42c2c424
SD		 8266#if defined(CONFIG_NFS_V4_2)
8267 [2] = &nfs_v4_2_minor_ops,
8268#endif
97dc1359
TM		 8269};
8270
17f26b12 8271static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8272 .create = nfs_create,
8273 .lookup = nfs_lookup,
8274 .atomic_open = nfs_atomic_open,
8275 .link = nfs_link,
8276 .unlink = nfs_unlink,
8277 .symlink = nfs_symlink,
8278 .mkdir = nfs_mkdir,
8279 .rmdir = nfs_rmdir,
8280 .mknod = nfs_mknod,
8281 .rename = nfs_rename,
8282 .permission = nfs_permission,
8283 .getattr = nfs_getattr,
8284 .setattr = nfs_setattr,
8285 .getxattr = generic_getxattr,
8286 .setxattr = generic_setxattr,
8287 .listxattr = generic_listxattr,
8288 .removexattr = generic_removexattr,
8289};
8290
92e1d5be 8291static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8292 .permission = nfs_permission,
8293 .getattr = nfs_getattr,
8294 .setattr = nfs_setattr,
64c2ce8b
AK		 8295 .getxattr = generic_getxattr,
8296 .setxattr = generic_setxattr,
8297 .listxattr = generic_listxattr,
8298 .removexattr = generic_removexattr,
6b3b5496
BF		 8299};
8300
509de811 8301const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8302 .version = 4, /* protocol version */
8303 .dentry_ops = &nfs4_dentry_operations,
8304 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8305 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8306 .file_ops = &nfs4_file_operations,
1da177e4 8307 .getroot = nfs4_proc_get_root,
281cad46 8308 .submount = nfs4_submount,
ff9099f2 8309 .try_mount = nfs4_try_mount,
1da177e4
LT		 8310 .getattr = nfs4_proc_getattr,
8311 .setattr = nfs4_proc_setattr,
8312 .lookup = nfs4_proc_lookup,
8313 .access = nfs4_proc_access,
8314 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8315 .create = nfs4_proc_create,
8316 .remove = nfs4_proc_remove,
8317 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8318 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4
LT		 8319 .unlink_done = nfs4_proc_unlink_done,
8320 .rename = nfs4_proc_rename,
d3d4152a 8321 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8322 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8323 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8324 .link = nfs4_proc_link,
8325 .symlink = nfs4_proc_symlink,
8326 .mkdir = nfs4_proc_mkdir,
8327 .rmdir = nfs4_proc_remove,
8328 .readdir = nfs4_proc_readdir,
8329 .mknod = nfs4_proc_mknod,
8330 .statfs = nfs4_proc_statfs,
8331 .fsinfo = nfs4_proc_fsinfo,
8332 .pathconf = nfs4_proc_pathconf,
e9326dca 8333 .set_capabilities = nfs4_server_capabilities,
1da177e4
LT		 8334 .decode_dirent = nfs4_decode_dirent,
8335 .read_setup = nfs4_proc_read_setup,
1abb5088 8336 .read_pageio_init = pnfs_pageio_init_read,
ea7c3303 8337 .read_rpc_prepare = nfs4_proc_read_rpc_prepare,
ec06c096 8338 .read_done = nfs4_read_done,
1da177e4 8339 .write_setup = nfs4_proc_write_setup,
57208fa7 8340 .write_pageio_init = pnfs_pageio_init_write,
c6cb80d0 8341 .write_rpc_prepare = nfs4_proc_write_rpc_prepare,
788e7a89 8342 .write_done = nfs4_write_done,
1da177e4 8343 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8344 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8345 .commit_done = nfs4_commit_done,
1da177e4 8346 .lock = nfs4_proc_lock,
e50a1c2e 8347 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8348 .close_context = nfs4_close_context,
2b484297 8349 .open_context = nfs4_atomic_open,
011e2a7f 8350 .have_delegation = nfs4_have_delegation,
57ec14c5 8351 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8352 .alloc_client = nfs4_alloc_client,
45a52a02 8353 .init_client = nfs4_init_client,
cdb7eced 8354 .free_client = nfs4_free_client,
1179acc6
BS		 8355 .create_server = nfs4_create_server,
8356 .clone_server = nfs_clone_server,
1da177e4
LT		 8357};
8358
64c2ce8b
AK		 8359static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8360 .prefix = XATTR_NAME_NFSV4_ACL,
8361 .list = nfs4_xattr_list_nfs4_acl,
8362 .get = nfs4_xattr_get_nfs4_acl,
8363 .set = nfs4_xattr_set_nfs4_acl,
8364};
8365
8366const struct xattr_handler *nfs4_xattr_handlers[] = {
8367 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8368#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8369 &nfs4_xattr_nfs4_label_handler,
8370#endif
64c2ce8b
AK		 8371 NULL
8372};
8373
1da177e4
LT		 8374/*
8375 * Local variables:
8376 * c-basic-offset: 8
8377 * End:
8378 */
Linux 6.x block layer and io_uring tree(s)