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NFS: Don't fsync twice for O_SYNC/IS_SYNC files
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
feaff8e5 41#include <linux/file.h>
1da177e4 42#include <linux/string.h>
652f89f6
TM		 43#include <linux/ratelimit.h>
44#include <linux/printk.h>
5a0e3ad6 45#include <linux/slab.h>
1da177e4
LT		 46#include <linux/sunrpc/clnt.h>
47#include <linux/nfs.h>
48#include <linux/nfs4.h>
49#include <linux/nfs_fs.h>
50#include <linux/nfs_page.h>
9b7160c5 51#include <linux/nfs_mount.h>
1da177e4 52#include <linux/namei.h>
02a913a7 53#include <linux/mount.h>
99fe60d0 54#include <linux/module.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
40c64c26 66#include "nfs4idmap.h"
73e39aaa 67#include "nfs4session.h"
de242c0b 68#include "fscache.h"
1da177e4 69
c6d01c6f
TM		 70#include "nfs4trace.h"
71
1da177e4
LT		 72#define NFSDBG_FACILITY NFSDBG_PROC
73
2066fe89 74#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 75#define NFS4_POLL_RETRY_MAX (15*HZ)
76
cdd4e68b 77struct nfs4_opendata;
864472e9 78static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 79static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 80static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
8478eaa1 81static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *, long *);
81934ddb 82static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 83static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
84static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 85static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
86 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 87 struct nfs4_state *state, struct nfs4_label *ilabel,
88 struct nfs4_label *olabel);
f062eb6c 89#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 90static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
91 struct rpc_cred *);
92static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
93 struct rpc_cred *);
f062eb6c 94#endif
aa9c2669
DQ		 95
96#ifdef CONFIG_NFS_V4_SECURITY_LABEL
97static inline struct nfs4_label *
98nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
99 struct iattr *sattr, struct nfs4_label *label)
100{
101 int err;
102
103 if (label == NULL)
104 return NULL;
105
106 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
107 return NULL;
108
aa9c2669
DQ		 109 err = security_dentry_init_security(dentry, sattr->ia_mode,
110 &dentry->d_name, (void **)&label->label, &label->len);
111 if (err == 0)
112 return label;
113
114 return NULL;
115}
116static inline void
117nfs4_label_release_security(struct nfs4_label *label)
118{
119 if (label)
120 security_release_secctx(label->label, label->len);
121}
122static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
123{
124 if (label)
125 return server->attr_bitmask;
126
127 return server->attr_bitmask_nl;
128}
129#else
130static inline struct nfs4_label *
131nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
132 struct iattr *sattr, struct nfs4_label *l)
133{ return NULL; }
134static inline void
135nfs4_label_release_security(struct nfs4_label *label)
136{ return; }
137static inline u32 *
138nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
139{ return server->attr_bitmask; }
140#endif
141
1da177e4 142/* Prevent leaks of NFSv4 errors into userland */
46f72f57 143static int nfs4_map_errors(int err)
1da177e4 144{
52567b03
TM		 145 if (err >= -1000)
146 return err;
147 switch (err) {
148 case -NFS4ERR_RESOURCE:
30005121
WAA		 149 case -NFS4ERR_LAYOUTTRYLATER:
150 case -NFS4ERR_RECALLCONFLICT:
52567b03 151 return -EREMOTEIO;
7ebb9315 152 case -NFS4ERR_WRONGSEC:
8897538e 153 case -NFS4ERR_WRONG_CRED:
7ebb9315 154 return -EPERM;
3ddeb7c5
TM		 155 case -NFS4ERR_BADOWNER:
156 case -NFS4ERR_BADNAME:
157 return -EINVAL;
fb13bfa7
TM		 158 case -NFS4ERR_SHARE_DENIED:
159 return -EACCES;
f25efd85
SD		 160 case -NFS4ERR_MINOR_VERS_MISMATCH:
161 return -EPROTONOSUPPORT;
6e3cf241
TM		 162 case -NFS4ERR_FILE_OPEN:
163 return -EBUSY;
52567b03 164 default:
1da177e4 165 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 166 __func__, -err);
52567b03 167 break;
1da177e4 168 }
52567b03 169 return -EIO;
1da177e4
LT		 170}
171
172/*
173 * This is our standard bitmap for GETATTR requests.
174 */
1549210f 175const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 176 FATTR4_WORD0_TYPE
177 | FATTR4_WORD0_CHANGE
178 | FATTR4_WORD0_SIZE
179 | FATTR4_WORD0_FSID
180 | FATTR4_WORD0_FILEID,
181 FATTR4_WORD1_MODE
182 | FATTR4_WORD1_NUMLINKS
183 | FATTR4_WORD1_OWNER
184 | FATTR4_WORD1_OWNER_GROUP
185 | FATTR4_WORD1_RAWDEV
186 | FATTR4_WORD1_SPACE_USED
187 | FATTR4_WORD1_TIME_ACCESS
188 | FATTR4_WORD1_TIME_METADATA
ea96d1ec
AS		 189 | FATTR4_WORD1_TIME_MODIFY
190 | FATTR4_WORD1_MOUNTED_ON_FILEID,
aa9c2669
DQ		 191#ifdef CONFIG_NFS_V4_SECURITY_LABEL
192 FATTR4_WORD2_SECURITY_LABEL
193#endif
1da177e4
LT		 194};
195
1549210f
TM		 196static const u32 nfs4_pnfs_open_bitmap[3] = {
197 FATTR4_WORD0_TYPE
198 | FATTR4_WORD0_CHANGE
199 | FATTR4_WORD0_SIZE
200 | FATTR4_WORD0_FSID
201 | FATTR4_WORD0_FILEID,
202 FATTR4_WORD1_MODE
203 | FATTR4_WORD1_NUMLINKS
204 | FATTR4_WORD1_OWNER
205 | FATTR4_WORD1_OWNER_GROUP
206 | FATTR4_WORD1_RAWDEV
207 | FATTR4_WORD1_SPACE_USED
208 | FATTR4_WORD1_TIME_ACCESS
209 | FATTR4_WORD1_TIME_METADATA
210 | FATTR4_WORD1_TIME_MODIFY,
211 FATTR4_WORD2_MDSTHRESHOLD
212};
213
e23008ec
AA		 214static const u32 nfs4_open_noattr_bitmap[3] = {
215 FATTR4_WORD0_TYPE
216 | FATTR4_WORD0_CHANGE
217 | FATTR4_WORD0_FILEID,
218};
219
a09df2ca 220const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 221 FATTR4_WORD0_FILES_AVAIL
222 | FATTR4_WORD0_FILES_FREE
223 | FATTR4_WORD0_FILES_TOTAL,
224 FATTR4_WORD1_SPACE_AVAIL
225 | FATTR4_WORD1_SPACE_FREE
226 | FATTR4_WORD1_SPACE_TOTAL
227};
228
a09df2ca 229const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 230 FATTR4_WORD0_MAXLINK
231 | FATTR4_WORD0_MAXNAME,
232 0
233};
234
dae100c2 235const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 236 | FATTR4_WORD0_MAXREAD
237 | FATTR4_WORD0_MAXWRITE
238 | FATTR4_WORD0_LEASE_TIME,
55b6e774 239 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 240 | FATTR4_WORD1_FS_LAYOUT_TYPES,
241 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 242};
243
a09df2ca 244const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 245 FATTR4_WORD0_TYPE
246 | FATTR4_WORD0_CHANGE
247 | FATTR4_WORD0_SIZE
248 | FATTR4_WORD0_FSID
249 | FATTR4_WORD0_FILEID
250 | FATTR4_WORD0_FS_LOCATIONS,
251 FATTR4_WORD1_MODE
252 | FATTR4_WORD1_NUMLINKS
253 | FATTR4_WORD1_OWNER
254 | FATTR4_WORD1_OWNER_GROUP
255 | FATTR4_WORD1_RAWDEV
256 | FATTR4_WORD1_SPACE_USED
257 | FATTR4_WORD1_TIME_ACCESS
258 | FATTR4_WORD1_TIME_METADATA
259 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 260 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 261};
262
bc4785cd 263static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 264 struct nfs4_readdir_arg *readdir)
265{
0dbb4c67 266 __be32 *start, *p;
1da177e4 267
1da177e4 268 if (cookie > 2) {
b7ef1956 269 readdir->cookie = cookie;
1da177e4
LT		 270 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
271 return;
272 }
273
274 readdir->cookie = 0;
275 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
276 if (cookie == 2)
277 return;
278
279 /*
280 * NFSv4 servers do not return entries for '.' and '..'
281 * Therefore, we fake these entries here. We let '.'
282 * have cookie 0 and '..' have cookie 1. Note that
283 * when talking to the server, we always send cookie 0
284 * instead of 1 or 2.
285 */
2b86ce2d 286 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 287
288 if (cookie == 0) {
289 *p++ = xdr_one; /* next */
290 *p++ = xdr_zero; /* cookie, first word */
291 *p++ = xdr_one; /* cookie, second word */
292 *p++ = xdr_one; /* entry len */
293 memcpy(p, ".\0\0\0", 4); /* entry */
294 p++;
295 *p++ = xdr_one; /* bitmap length */
296 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
297 *p++ = htonl(8); /* attribute buffer length */
2b0143b5 298 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
1da177e4
LT		 299 }
300
301 *p++ = xdr_one; /* next */
302 *p++ = xdr_zero; /* cookie, first word */
303 *p++ = xdr_two; /* cookie, second word */
304 *p++ = xdr_two; /* entry len */
305 memcpy(p, "..\0\0", 4); /* entry */
306 p++;
307 *p++ = xdr_one; /* bitmap length */
308 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
309 *p++ = htonl(8); /* attribute buffer length */
2b0143b5 310 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
1da177e4
LT		 311
312 readdir->pgbase = (char *)p - (char *)start;
313 readdir->count -= readdir->pgbase;
2b86ce2d 314 kunmap_atomic(start);
1da177e4
LT		 315}
316
8478eaa1
N		 317static long nfs4_update_delay(long *timeout)
318{
319 long ret;
320 if (!timeout)
321 return NFS4_POLL_RETRY_MAX;
322 if (*timeout <= 0)
323 *timeout = NFS4_POLL_RETRY_MIN;
324 if (*timeout > NFS4_POLL_RETRY_MAX)
325 *timeout = NFS4_POLL_RETRY_MAX;
326 ret = *timeout;
327 *timeout <<= 1;
328 return ret;
329}
330
65de872e
TM		 331static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
332{
333 int res = 0;
334
335 might_sleep();
336
8478eaa1
N		 337 freezable_schedule_timeout_killable_unsafe(
338 nfs4_update_delay(timeout));
65de872e
TM		 339 if (fatal_signal_pending(current))
340 res = -ERESTARTSYS;
65de872e
TM		 341 return res;
342}
343
344/* This is the error handling routine for processes that are allowed
345 * to sleep.
346 */
f4ac1674 347int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 348{
349 struct nfs_client *clp = server->nfs_client;
9e33bed5 350 struct nfs4_state *state = exception->state;
3114ea7a 351 struct inode *inode = exception->inode;
65de872e
TM		 352 int ret = errorcode;
353
354 exception->retry = 0;
355 switch(errorcode) {
356 case 0:
357 return 0;
3114ea7a 358 case -NFS4ERR_OPENMODE:
5ba12443
TM		 359 case -NFS4ERR_DELEG_REVOKED:
360 case -NFS4ERR_ADMIN_REVOKED:
361 case -NFS4ERR_BAD_STATEID:
011e2a7f 362 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 363 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 364 exception->retry = 1;
365 return 0;
366 }
367 if (state == NULL)
368 break;
5d422301
TM		 369 ret = nfs4_schedule_stateid_recovery(server, state);
370 if (ret < 0)
371 break;
3114ea7a 372 goto wait_on_recovery;
0ced63d1 373 case -NFS4ERR_EXPIRED:
5d422301
TM		 374 if (state != NULL) {
375 ret = nfs4_schedule_stateid_recovery(server, state);
376 if (ret < 0)
377 break;
378 }
65de872e 379 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 380 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 381 nfs4_schedule_lease_recovery(clp);
382 goto wait_on_recovery;
519ae255
CL		 383 case -NFS4ERR_MOVED:
384 ret = nfs4_schedule_migration_recovery(server);
385 if (ret < 0)
386 break;
387 goto wait_on_recovery;
8ef2f8d4
CL		 388 case -NFS4ERR_LEASE_MOVED:
389 nfs4_schedule_lease_moved_recovery(clp);
390 goto wait_on_recovery;
03391693 391#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 392 case -NFS4ERR_BADSESSION:
393 case -NFS4ERR_BADSLOT:
394 case -NFS4ERR_BAD_HIGH_SLOT:
395 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
396 case -NFS4ERR_DEADSESSION:
397 case -NFS4ERR_SEQ_FALSE_RETRY:
398 case -NFS4ERR_SEQ_MISORDERED:
399 dprintk("%s ERROR: %d Reset session\n", __func__,
400 errorcode);
9f594791 401 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 402 goto wait_on_recovery;
03391693 403#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 404 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 405 if (exception->timeout > HZ) {
406 /* We have retried a decent amount, time to
407 * fail
408 */
409 ret = -EBUSY;
410 break;
411 }
65de872e
TM		 412 case -NFS4ERR_GRACE:
413 case -NFS4ERR_DELAY:
414 ret = nfs4_delay(server->client, &exception->timeout);
415 if (ret != 0)
416 break;
a8a4ae3a 417 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 418 case -NFS4ERR_OLD_STATEID:
419 exception->retry = 1;
b064eca2
TM		 420 break;
421 case -NFS4ERR_BADOWNER:
422 /* The following works around a Linux server bug! */
423 case -NFS4ERR_BADNAME:
424 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
425 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
426 exception->retry = 1;
427 printk(KERN_WARNING "NFS: v4 server %s "
428 "does not accept raw "
429 "uid/gids. "
430 "Reenabling the idmapper.\n",
431 server->nfs_client->cl_hostname);
432 }
65de872e
TM		 433 }
434 /* We failed to handle the error */
435 return nfs4_map_errors(ret);
0400a6b0 436wait_on_recovery:
a2c0b9e2 437 ret = nfs4_wait_clnt_recover(clp);
519ae255
CL		 438 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
439 return -EIO;
a2c0b9e2
TM		 440 if (ret == 0)
441 exception->retry = 1;
442 return ret;
65de872e
TM		 443}
444
a5250def
WAA		 445/*
446 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
447 * or 'false' otherwise.
448 */
449static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
450{
451 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
452
453 if (flavor == RPC_AUTH_GSS_KRB5I ||
454 flavor == RPC_AUTH_GSS_KRB5P)
455 return true;
456
457 return false;
458}
65de872e 459
452e9352 460static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 461{
1da177e4
LT		 462 spin_lock(&clp->cl_lock);
463 if (time_before(clp->cl_last_renewal,timestamp))
464 clp->cl_last_renewal = timestamp;
465 spin_unlock(&clp->cl_lock);
466}
467
452e9352
TM		 468static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
469{
be824167
TM		 470 struct nfs_client *clp = server->nfs_client;
471
472 if (!nfs4_has_session(clp))
473 do_renew_lease(clp, timestamp);
452e9352
TM		 474}
475
2a3eb2b9
CL		 476struct nfs4_call_sync_data {
477 const struct nfs_server *seq_server;
478 struct nfs4_sequence_args *seq_args;
479 struct nfs4_sequence_res *seq_res;
480};
481
be3a5d23
TM		 482void nfs4_init_sequence(struct nfs4_sequence_args *args,
483 struct nfs4_sequence_res *res, int cache_reply)
a9c92d6b
CL		 484{
485 args->sa_slot = NULL;
486 args->sa_cache_this = cache_reply;
487 args->sa_privileged = 0;
488
489 res->sr_slot = NULL;
490}
491
492static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
493{
494 args->sa_privileged = 1;
495}
496
cb04ad2a
PT		 497int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
498 struct nfs4_sequence_args *args,
499 struct nfs4_sequence_res *res,
500 struct rpc_task *task)
3bd2384a 501{
3bd2384a
CL		 502 struct nfs4_slot *slot;
503
504 /* slot already allocated? */
505 if (res->sr_slot != NULL)
506 goto out_start;
507
508 spin_lock(&tbl->slot_tbl_lock);
509 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
510 goto out_sleep;
511
512 slot = nfs4_alloc_slot(tbl);
513 if (IS_ERR(slot)) {
514 if (slot == ERR_PTR(-ENOMEM))
515 task->tk_timeout = HZ >> 2;
516 goto out_sleep;
517 }
518 spin_unlock(&tbl->slot_tbl_lock);
519
520 args->sa_slot = slot;
521 res->sr_slot = slot;
522
523out_start:
524 rpc_call_start(task);
525 return 0;
526
527out_sleep:
528 if (args->sa_privileged)
529 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
530 NULL, RPC_PRIORITY_PRIVILEGED);
531 else
532 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
533 spin_unlock(&tbl->slot_tbl_lock);
534 return -EAGAIN;
535}
cb04ad2a 536EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
3bd2384a
CL		 537
538static int nfs40_sequence_done(struct rpc_task *task,
539 struct nfs4_sequence_res *res)
540{
541 struct nfs4_slot *slot = res->sr_slot;
542 struct nfs4_slot_table *tbl;
543
cab92c19 544 if (slot == NULL)
3bd2384a
CL		 545 goto out;
546
547 tbl = slot->table;
548 spin_lock(&tbl->slot_tbl_lock);
549 if (!nfs41_wake_and_assign_slot(tbl, slot))
550 nfs4_free_slot(tbl, slot);
551 spin_unlock(&tbl->slot_tbl_lock);
552
553 res->sr_slot = NULL;
554out:
555 return 1;
556}
557
cccef3b9
AA		 558#if defined(CONFIG_NFS_V4_1)
559
d185a334 560static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 561{
e3725ec0 562 struct nfs4_session *session;
13615871 563 struct nfs4_slot_table *tbl;
a13ce7c6 564 struct nfs4_slot *slot = res->sr_slot;
c10e4498 565 bool send_new_highest_used_slotid = false;
13615871 566
a13ce7c6 567 tbl = slot->table;
e3725ec0 568 session = tbl->session;
ea028ac9 569
35dc1d74 570 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 571 /* Be nice to the server: try to ensure that the last transmitted
572 * value for highest_user_slotid <= target_highest_slotid
573 */
574 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
575 send_new_highest_used_slotid = true;
576
a13ce7c6 577 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 578 send_new_highest_used_slotid = false;
579 goto out_unlock;
580 }
a13ce7c6 581 nfs4_free_slot(tbl, slot);
c10e4498
TM		 582
583 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
584 send_new_highest_used_slotid = false;
b75ad4cd 585out_unlock:
35dc1d74 586 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 587 res->sr_slot = NULL;
c10e4498 588 if (send_new_highest_used_slotid)
3f10a6af 589 nfs41_notify_server(session->clp);
13615871
AA		 590}
591
f9c96fcc 592int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 593{
e3725ec0 594 struct nfs4_session *session;
a13ce7c6 595 struct nfs4_slot *slot = res->sr_slot;
14516c3a 596 struct nfs_client *clp;
ac20d163 597 bool interrupted = false;
85563073 598 int ret = 1;
b0df806c 599
a13ce7c6
TM		 600 if (slot == NULL)
601 goto out_noaction;
468f8613
BS		 602 /* don't increment the sequence number if the task wasn't sent */
603 if (!RPC_WAS_SENT(task))
b0df806c
AA		 604 goto out;
605
e3725ec0 606 session = slot->table->session;
933602e3 607
ac20d163
TM		 608 if (slot->interrupted) {
609 slot->interrupted = 0;
610 interrupted = true;
611 }
612
2f92ae34 613 trace_nfs4_sequence_done(session, res);
691daf3b 614 /* Check the SEQUENCE operation status */
14516c3a
TM		 615 switch (res->sr_status) {
616 case 0:
b0df806c 617 /* Update the slot's sequence and clientid lease timer */
933602e3 618 ++slot->seq_nr;
e3725ec0 619 clp = session->clp;
8e63b6a8 620 do_renew_lease(clp, res->sr_timestamp);
0629e370 621 /* Check sequence flags */
b15c7cdd 622 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
464ee9f9 623 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 624 break;
ac20d163
TM		 625 case 1:
626 /*
627 * sr_status remains 1 if an RPC level error occurred.
628 * The server may or may not have processed the sequence
629 * operation..
630 * Mark the slot as having hosted an interrupted RPC call.
631 */
632 slot->interrupted = 1;
633 goto out;
14516c3a
TM		 634 case -NFS4ERR_DELAY:
635 /* The server detected a resend of the RPC call and
636 * returned NFS4ERR_DELAY as per Section 2.10.6.2
637 * of RFC5661.
638 */
df2fabff 639 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 640 __func__,
df2fabff 641 slot->slot_nr,
933602e3 642 slot->seq_nr);
14516c3a 643 goto out_retry;
85563073
TM		 644 case -NFS4ERR_BADSLOT:
645 /*
646 * The slot id we used was probably retired. Try again
647 * using a different slot id.
648 */
e8794440
TM		 649 goto retry_nowait;
650 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 651 /*
652 * Was the last operation on this sequence interrupted?
653 * If so, retry after bumping the sequence number.
654 */
655 if (interrupted) {
656 ++slot->seq_nr;
657 goto retry_nowait;
658 }
e8794440
TM		 659 /*
660 * Could this slot have been previously retired?
661 * If so, then the server may be expecting seq_nr = 1!
662 */
8e63b6a8
TM		 663 if (slot->seq_nr != 1) {
664 slot->seq_nr = 1;
665 goto retry_nowait;
666 }
667 break;
e8794440
TM		 668 case -NFS4ERR_SEQ_FALSE_RETRY:
669 ++slot->seq_nr;
670 goto retry_nowait;
14516c3a
TM		 671 default:
672 /* Just update the slot sequence no. */
933602e3 673 ++slot->seq_nr;
b0df806c
AA		 674 }
675out:
676 /* The session may be reset by one of the error handlers. */
677 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 678 nfs41_sequence_free_slot(res);
a13ce7c6 679out_noaction:
85563073 680 return ret;
e8794440
TM		 681retry_nowait:
682 if (rpc_restart_call_prepare(task)) {
683 task->tk_status = 0;
684 ret = 0;
685 }
686 goto out;
14516c3a 687out_retry:
d05dd4e9 688 if (!rpc_restart_call(task))
14516c3a
TM		 689 goto out;
690 rpc_delay(task, NFS4_POLL_RETRY_MAX);
691 return 0;
b0df806c 692}
f9c96fcc 693EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 694
2c4b131d 695int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 696{
e3725ec0 697 if (res->sr_slot == NULL)
14516c3a 698 return 1;
3bd2384a
CL		 699 if (!res->sr_slot->table->session)
700 return nfs40_sequence_done(task, res);
14516c3a 701 return nfs41_sequence_done(task, res);
df896455 702}
2c4b131d 703EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 704
dc70d7b3 705int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 706 struct nfs4_sequence_args *args,
707 struct nfs4_sequence_res *res,
ce5039c1
AA		 708 struct rpc_task *task)
709{
fbcd4abc
AA		 710 struct nfs4_slot *slot;
711 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 712
713 dprintk("--> %s\n", __func__);
ce5039c1 714 /* slot already allocated? */
dfb4f309 715 if (res->sr_slot != NULL)
d9afbd1b 716 goto out_success;
ce5039c1 717
fbcd4abc
AA		 718 tbl = &session->fc_slot_table;
719
69d206b5
TM		 720 task->tk_timeout = 0;
721
fbcd4abc 722 spin_lock(&tbl->slot_tbl_lock);
774d5f14 723 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 724 !args->sa_privileged) {
0b1c8fc4 725 /* The state manager will wait until the slot table is empty */
0b1c8fc4 726 dprintk("%s session is draining\n", __func__);
7b939a3f 727 goto out_sleep;
689cf5c1
AB		 728 }
729
2dc03b7f 730 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 731 if (IS_ERR(slot)) {
732 /* If out of memory, try again in 1/4 second */
733 if (slot == ERR_PTR(-ENOMEM))
734 task->tk_timeout = HZ >> 2;
fbcd4abc 735 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 736 goto out_sleep;
fbcd4abc
AA		 737 }
738 spin_unlock(&tbl->slot_tbl_lock);
739
2b2fa717 740 args->sa_slot = slot;
fbcd4abc 741
e8d92382 742 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 743 slot->slot_nr, slot->seq_nr);
fbcd4abc 744
dfb4f309 745 res->sr_slot = slot;
8e63b6a8 746 res->sr_timestamp = jiffies;
2a6e26cd 747 res->sr_status_flags = 0;
fbcd4abc
AA		 748 /*
749 * sr_status is only set in decode_sequence, and so will remain
750 * set to 1 if an rpc level failure occurs.
751 */
752 res->sr_status = 1;
2f92ae34 753 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 754out_success:
755 rpc_call_start(task);
ce5039c1 756 return 0;
7b939a3f 757out_sleep:
8fe72bac
TM		 758 /* Privileged tasks are queued with top priority */
759 if (args->sa_privileged)
1e1093c7
TM		 760 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
761 NULL, RPC_PRIORITY_PRIVILEGED);
762 else
763 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 764 spin_unlock(&tbl->slot_tbl_lock);
765 return -EAGAIN;
ce5039c1 766}
dc70d7b3 767EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 768
5a580e0a
CL		 769static int nfs4_setup_sequence(const struct nfs_server *server,
770 struct nfs4_sequence_args *args,
771 struct nfs4_sequence_res *res,
772 struct rpc_task *task)
ce5039c1 773{
035168ab 774 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 775 int ret = 0;
776
3bd2384a 777 if (!session)
cb04ad2a
PT		 778 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
779 args, res, task);
035168ab 780
e8d92382 781 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 782 __func__, session->clp, session, res->sr_slot ?
e8d92382 783 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 784
9d12b216 785 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 786
ce5039c1
AA		 787 dprintk("<-- %s status=%d\n", __func__, ret);
788 return ret;
789}
790
ce5039c1
AA		 791static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
792{
2a3eb2b9 793 struct nfs4_call_sync_data *data = calldata;
6ba7db34 794 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 795
035168ab
TM		 796 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
797
d9afbd1b 798 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 799}
800
69ab40c4
AA		 801static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
802{
2a3eb2b9 803 struct nfs4_call_sync_data *data = calldata;
69ab40c4 804
14516c3a 805 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 806}
807
17280175 808static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 809 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 810 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 811};
812
3bd2384a
CL		 813#else /* !CONFIG_NFS_V4_1 */
814
9915ea7e
CL		 815static int nfs4_setup_sequence(const struct nfs_server *server,
816 struct nfs4_sequence_args *args,
817 struct nfs4_sequence_res *res,
818 struct rpc_task *task)
819{
cb04ad2a
PT		 820 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
821 args, res, task);
9915ea7e
CL		 822}
823
2c4b131d
PT		 824int nfs4_sequence_done(struct rpc_task *task,
825 struct nfs4_sequence_res *res)
9915ea7e 826{
3bd2384a 827 return nfs40_sequence_done(task, res);
9915ea7e 828}
2c4b131d 829EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 830
831#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 832
833static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
834{
835 struct nfs4_call_sync_data *data = calldata;
836 nfs4_setup_sequence(data->seq_server,
837 data->seq_args, data->seq_res, task);
838}
839
840static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
841{
842 struct nfs4_call_sync_data *data = calldata;
843 nfs4_sequence_done(task, data->seq_res);
844}
845
846static const struct rpc_call_ops nfs40_call_sync_ops = {
847 .rpc_call_prepare = nfs40_call_sync_prepare,
848 .rpc_call_done = nfs40_call_sync_done,
849};
850
7c513058
BS		 851static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
852 struct nfs_server *server,
ce5039c1
AA		 853 struct rpc_message *msg,
854 struct nfs4_sequence_args *args,
8fe72bac 855 struct nfs4_sequence_res *res)
ce5039c1
AA		 856{
857 int ret;
858 struct rpc_task *task;
9915ea7e 859 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 860 struct nfs4_call_sync_data data = {
035168ab 861 .seq_server = server,
ce5039c1
AA		 862 .seq_args = args,
863 .seq_res = res,
ce5039c1
AA		 864 };
865 struct rpc_task_setup task_setup = {
7c513058 866 .rpc_client = clnt,
ce5039c1 867 .rpc_message = msg,
9915ea7e 868 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 869 .callback_data = &data
870 };
871
ce5039c1
AA		 872 task = rpc_run_task(&task_setup);
873 if (IS_ERR(task))
874 ret = PTR_ERR(task);
875 else {
876 ret = task->tk_status;
877 rpc_put_task(task);
878 }
879 return ret;
880}
881
7c513058
BS		 882int nfs4_call_sync(struct rpc_clnt *clnt,
883 struct nfs_server *server,
e73b83f2
BS		 884 struct rpc_message *msg,
885 struct nfs4_sequence_args *args,
886 struct nfs4_sequence_res *res,
887 int cache_reply)
888{
a9c92d6b 889 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 890 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 891}
cccef3b9 892
38478b24 893static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 894{
38478b24 895 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 896
38478b24 897 spin_lock(&dir->i_lock);
359d7d1c 898 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 899 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 900 nfs_force_lookup_revalidate(dir);
a9a4a87a 901 dir->i_version = cinfo->after;
3235b403 902 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
de242c0b 903 nfs_fscache_invalidate(dir);
38478b24 904 spin_unlock(&dir->i_lock);
1da177e4
LT		 905}
906
e56e0b78 907struct nfs4_opendata {
c6d00e63 908 struct kref kref;
e56e0b78
TM		 909 struct nfs_openargs o_arg;
910 struct nfs_openres o_res;
cdd4e68b
TM		 911 struct nfs_open_confirmargs c_arg;
912 struct nfs_open_confirmres c_res;
6926afd1
TM		 913 struct nfs4_string owner_name;
914 struct nfs4_string group_name;
a49c2691 915 struct nfs4_label *a_label;
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
6ae37339
TM		 943static u32
944nfs4_map_atomic_open_share(struct nfs_server *server,
945 fmode_t fmode, int openflags)
946{
947 u32 res = 0;
948
949 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
950 case FMODE_READ:
951 res = NFS4_SHARE_ACCESS_READ;
952 break;
953 case FMODE_WRITE:
954 res = NFS4_SHARE_ACCESS_WRITE;
955 break;
956 case FMODE_READ|FMODE_WRITE:
957 res = NFS4_SHARE_ACCESS_BOTH;
958 }
959 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
960 goto out;
961 /* Want no delegation if we're using O_DIRECT */
962 if (openflags & O_DIRECT)
963 res |= NFS4_SHARE_WANT_NO_DELEG;
964out:
965 return res;
966}
967
49f9a0fa
TM		 968static enum open_claim_type4
969nfs4_map_atomic_open_claim(struct nfs_server *server,
970 enum open_claim_type4 claim)
971{
972 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
973 return claim;
974 switch (claim) {
975 default:
976 return claim;
977 case NFS4_OPEN_CLAIM_FH:
978 return NFS4_OPEN_CLAIM_NULL;
979 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
980 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
981 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
982 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
983 }
984}
2ced46c2
TM		 985
986static void nfs4_init_opendata_res(struct nfs4_opendata *p)
987{
988 p->o_res.f_attr = &p->f_attr;
1775fd3e 989 p->o_res.f_label = p->f_label;
c1d51931
TM		 990 p->o_res.seqid = p->o_arg.seqid;
991 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 992 p->o_res.server = p->o_arg.server;
5f657530 993 p->o_res.access_request = p->o_arg.access;
2ced46c2 994 nfs_fattr_init(&p->f_attr);
6926afd1 995 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 996}
997
82a2c1b7 998static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 999 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 1000 const struct iattr *attrs,
1775fd3e 1001 struct nfs4_label *label,
4a1c0893 1002 enum open_claim_type4 claim,
8535b2be 1003 gfp_t gfp_mask)
e56e0b78 1004{
82a2c1b7 1005 struct dentry *parent = dget_parent(dentry);
2b0143b5 1006 struct inode *dir = d_inode(parent);
e56e0b78 1007 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1008 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 1009 struct nfs4_opendata *p;
1010
8535b2be 1011 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1012 if (p == NULL)
1013 goto err;
14c43f76
DQ		 1014
1015 p->f_label = nfs4_label_alloc(server, gfp_mask);
1016 if (IS_ERR(p->f_label))
1017 goto err_free_p;
1018
a49c2691
KM		 1019 p->a_label = nfs4_label_alloc(server, gfp_mask);
1020 if (IS_ERR(p->a_label))
1021 goto err_free_f;
1022
63f5f796
TM		 1023 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1024 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1025 if (IS_ERR(p->o_arg.seqid))
14c43f76 1026 goto err_free_label;
82a2c1b7
AV		 1027 nfs_sb_active(dentry->d_sb);
1028 p->dentry = dget(dentry);
e56e0b78
TM		 1029 p->dir = parent;
1030 p->owner = sp;
1031 atomic_inc(&sp->so_count);
dc0b027d
TM		 1032 p->o_arg.open_flags = flags;
1033 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
6ae37339
TM		 1034 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1035 fmode, flags);
ae2bb032
WAA		 1036 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1037 * will return permission denied for all bits until close */
1038 if (!(flags & O_EXCL)) {
1039 /* ask server to check for all possible rights as results
1040 * are cached */
1041 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1042 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1043 }
7539bbab 1044 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1045 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1046 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1047 p->o_arg.name = &dentry->d_name;
e56e0b78 1048 p->o_arg.server = server;
aa9c2669 1049 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1050 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
a49c2691 1051 p->o_arg.label = nfs4_label_copy(p->a_label, label);
49f9a0fa
TM		 1052 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1053 switch (p->o_arg.claim) {
4a1c0893
TM		 1054 case NFS4_OPEN_CLAIM_NULL:
1055 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1056 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1057 p->o_arg.fh = NFS_FH(dir);
1058 break;
1059 case NFS4_OPEN_CLAIM_PREVIOUS:
1060 case NFS4_OPEN_CLAIM_FH:
1061 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1062 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1063 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1064 }
536e43d1 1065 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1066 __u32 verf[2];
d77d76ff 1067
e56e0b78
TM		 1068 p->o_arg.u.attrs = &p->attrs;
1069 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1070
1071 verf[0] = jiffies;
1072 verf[1] = current->pid;
1073 memcpy(p->o_arg.u.verifier.data, verf,
1074 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1075 }
cdd4e68b
TM		 1076 p->c_arg.fh = &p->o_res.fh;
1077 p->c_arg.stateid = &p->o_res.stateid;
1078 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1079 nfs4_init_opendata_res(p);
c6d00e63 1080 kref_init(&p->kref);
e56e0b78 1081 return p;
14c43f76
DQ		 1082
1083err_free_label:
a49c2691
KM		 1084 nfs4_label_free(p->a_label);
1085err_free_f:
14c43f76
DQ		 1086 nfs4_label_free(p->f_label);
1087err_free_p:
e56e0b78
TM		 1088 kfree(p);
1089err:
1090 dput(parent);
1091 return NULL;
1092}
1093
c6d00e63 1094static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1095{
c6d00e63
TM		 1096 struct nfs4_opendata *p = container_of(kref,
1097 struct nfs4_opendata, kref);
82a2c1b7 1098 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1099
1100 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1101 if (p->state != NULL)
1102 nfs4_put_open_state(p->state);
c6d00e63 1103 nfs4_put_state_owner(p->owner);
14c43f76 1104
a49c2691 1105 nfs4_label_free(p->a_label);
14c43f76
DQ		 1106 nfs4_label_free(p->f_label);
1107
c6d00e63 1108 dput(p->dir);
82a2c1b7
AV		 1109 dput(p->dentry);
1110 nfs_sb_deactive(sb);
6926afd1 1111 nfs_fattr_free_names(&p->f_attr);
e911b815 1112 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1113 kfree(p);
1114}
1115
1116static void nfs4_opendata_put(struct nfs4_opendata *p)
1117{
1118 if (p != NULL)
1119 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1120}
1121
06f814a3
TM		 1122static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1123{
06f814a3
TM		 1124 int ret;
1125
06f814a3 1126 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1127 return ret;
1128}
1129
dc0b027d 1130static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1131{
1132 int ret = 0;
dc0b027d 1133
536e43d1 1134 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1135 goto out;
1136 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1137 case FMODE_READ:
88069f77
TM		 1138 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1139 && state->n_rdonly != 0;
6ee41268
TM		 1140 break;
1141 case FMODE_WRITE:
88069f77
TM		 1142 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1143 && state->n_wronly != 0;
6ee41268
TM		 1144 break;
1145 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1146 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1147 && state->n_rdwr != 0;
6ee41268 1148 }
dc0b027d 1149out:
6ee41268
TM		 1150 return ret;
1151}
1152
dc0b027d 1153static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1154{
652f89f6
TM		 1155 if (delegation == NULL)
1156 return 0;
dc0b027d 1157 if ((delegation->type & fmode) != fmode)
aac00a8d 1158 return 0;
d25be546
TM		 1159 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1160 return 0;
b7391f44 1161 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1162 return 1;
1163}
1164
dc0b027d 1165static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1166{
dc0b027d 1167 switch (fmode) {
e7616923
TM		 1168 case FMODE_WRITE:
1169 state->n_wronly++;
1170 break;
1171 case FMODE_READ:
1172 state->n_rdonly++;
1173 break;
1174 case FMODE_READ|FMODE_WRITE:
1175 state->n_rdwr++;
1176 }
dc0b027d 1177 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1178}
1179
4f14c194
TM		 1180static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1181{
1182 struct nfs_client *clp = state->owner->so_server->nfs_client;
1183 bool need_recover = false;
1184
1185 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1186 need_recover = true;
1187 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1188 need_recover = true;
1189 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1190 need_recover = true;
1191 if (need_recover)
1192 nfs4_state_mark_reclaim_nograce(clp, state);
1193}
1194
e999e80e
TM		 1195static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1196 nfs4_stateid *stateid)
1197{
1198 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1199 return true;
4f14c194
TM		 1200 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1201 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1202 return true;
4f14c194 1203 }
e999e80e
TM		 1204 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1205 return true;
1206 return false;
1207}
1208
f95549cf
TM		 1209static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1210{
3c38cbe2
TM		 1211 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1212 return;
f95549cf
TM		 1213 if (state->n_wronly)
1214 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1215 if (state->n_rdonly)
1216 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1217 if (state->n_rdwr)
1218 set_bit(NFS_O_RDWR_STATE, &state->flags);
3c38cbe2 1219 set_bit(NFS_OPEN_STATE, &state->flags);
f95549cf
TM		 1220}
1221
226056c5
TM		 1222static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1223 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1224{
226056c5
TM		 1225 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1226 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1227 case FMODE_WRITE:
1228 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1229 break;
1230 case FMODE_READ:
1231 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1232 break;
1233 case 0:
1234 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1235 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1236 clear_bit(NFS_OPEN_STATE, &state->flags);
1237 }
1238 if (stateid == NULL)
1239 return;
f95549cf
TM		 1240 /* Handle races with OPEN */
1241 if (!nfs4_stateid_match_other(stateid, &state->open_stateid) ||
1242 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1243 nfs_resync_open_stateid_locked(state);
226056c5 1244 return;
f95549cf 1245 }
003707c7 1246 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1247 nfs4_stateid_copy(&state->stateid, stateid);
1248 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1249}
1250
1251static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1252{
1253 write_seqlock(&state->seqlock);
1254 nfs_clear_open_stateid_locked(state, stateid, fmode);
1255 write_sequnlock(&state->seqlock);
4f14c194
TM		 1256 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1257 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1258}
1259
dc0b027d 1260static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1261{
dc0b027d 1262 switch (fmode) {
003707c7
TM		 1263 case FMODE_READ:
1264 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1265 break;
1266 case FMODE_WRITE:
1267 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1268 break;
1269 case FMODE_READ|FMODE_WRITE:
1270 set_bit(NFS_O_RDWR_STATE, &state->flags);
1271 }
e999e80e
TM		 1272 if (!nfs_need_update_open_stateid(state, stateid))
1273 return;
1274 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1275 nfs4_stateid_copy(&state->stateid, stateid);
1276 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1277}
1278
dc0b027d 1279static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1280{
8bda4e4c
TM		 1281 /*
1282 * Protect the call to nfs4_state_set_mode_locked and
1283 * serialise the stateid update
1284 */
1285 write_seqlock(&state->seqlock);
003707c7 1286 if (deleg_stateid != NULL) {
f597c537 1287 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1288 set_bit(NFS_DELEGATED_STATE, &state->flags);
1289 }
1290 if (open_stateid != NULL)
dc0b027d 1291 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1292 write_sequnlock(&state->seqlock);
1293 spin_lock(&state->owner->so_lock);
dc0b027d 1294 update_open_stateflags(state, fmode);
ec073428 1295 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1296}
1297
dc0b027d 1298static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1299{
1300 struct nfs_inode *nfsi = NFS_I(state->inode);
1301 struct nfs_delegation *deleg_cur;
1302 int ret = 0;
1303
dc0b027d 1304 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1305
1306 rcu_read_lock();
1307 deleg_cur = rcu_dereference(nfsi->delegation);
1308 if (deleg_cur == NULL)
1309 goto no_delegation;
1310
1311 spin_lock(&deleg_cur->lock);
17f26b12 1312 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1313 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1314 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1315 goto no_delegation_unlock;
1316
1317 if (delegation == NULL)
1318 delegation = &deleg_cur->stateid;
f597c537 1319 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1320 goto no_delegation_unlock;
1321
b7391f44 1322 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1323 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1324 ret = 1;
1325no_delegation_unlock:
1326 spin_unlock(&deleg_cur->lock);
1327no_delegation:
1328 rcu_read_unlock();
1329
1330 if (!ret && open_stateid != NULL) {
dc0b027d 1331 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1332 ret = 1;
1333 }
4f14c194
TM		 1334 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1335 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1336
1337 return ret;
1338}
1339
39071e6f
TM		 1340static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1341 const nfs4_stateid *stateid)
1342{
1343 struct nfs4_state *state = lsp->ls_state;
1344 bool ret = false;
1345
1346 spin_lock(&state->state_lock);
1347 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1348 goto out_noupdate;
1349 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1350 goto out_noupdate;
1351 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1352 ret = true;
1353out_noupdate:
1354 spin_unlock(&state->state_lock);
1355 return ret;
1356}
34310430 1357
dc0b027d 1358static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1359{
1360 struct nfs_delegation *delegation;
1361
1362 rcu_read_lock();
1363 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1364 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1365 rcu_read_unlock();
1366 return;
1367 }
1368 rcu_read_unlock();
57ec14c5 1369 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1370}
1371
6ee41268 1372static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1373{
1374 struct nfs4_state *state = opendata->state;
1375 struct nfs_inode *nfsi = NFS_I(state->inode);
1376 struct nfs_delegation *delegation;
f448badd 1377 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1378 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1379 nfs4_stateid stateid;
1380 int ret = -EAGAIN;
1381
aac00a8d 1382 for (;;) {
61beef75 1383 spin_lock(&state->owner->so_lock);
dc0b027d 1384 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1385 update_open_stateflags(state, fmode);
6ee41268 1386 spin_unlock(&state->owner->so_lock);
61beef75 1387 goto out_return_state;
6ee41268 1388 }
61beef75 1389 spin_unlock(&state->owner->so_lock);
34310430
TM		 1390 rcu_read_lock();
1391 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1392 if (!can_open_delegated(delegation, fmode)) {
34310430 1393 rcu_read_unlock();
aac00a8d 1394 break;
34310430 1395 }
aac00a8d 1396 /* Save the delegation */
f597c537 1397 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1398 rcu_read_unlock();
fa332941 1399 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1400 if (!opendata->is_recover) {
1401 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1402 if (ret != 0)
1403 goto out;
1404 }
aac00a8d 1405 ret = -EAGAIN;
34310430
TM		 1406
1407 /* Try to update the stateid using the delegation */
dc0b027d 1408 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1409 goto out_return_state;
aac00a8d 1410 }
aac00a8d
TM		 1411out:
1412 return ERR_PTR(ret);
1413out_return_state:
1414 atomic_inc(&state->count);
1415 return state;
1416}
1417
e23008ec
AA		 1418static void
1419nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1420{
1421 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1422 struct nfs_delegation *delegation;
1423 int delegation_flags = 0;
1424
1425 rcu_read_lock();
1426 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1427 if (delegation)
1428 delegation_flags = delegation->flags;
1429 rcu_read_unlock();
1430 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1431 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1432 "returning a delegation for "
1433 "OPEN(CLAIM_DELEGATE_CUR)\n",
1434 clp->cl_hostname);
1435 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1436 nfs_inode_set_delegation(state->inode,
1437 data->owner->so_cred,
1438 &data->o_res);
1439 else
1440 nfs_inode_reclaim_delegation(state->inode,
1441 data->owner->so_cred,
1442 &data->o_res);
1443}
1444
1445/*
1446 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1447 * and update the nfs4_state.
1448 */
1449static struct nfs4_state *
1450_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1451{
1452 struct inode *inode = data->state->inode;
1453 struct nfs4_state *state = data->state;
1454 int ret;
1455
d2bfda2e
WAA		 1456 if (!data->rpc_done) {
1457 if (data->rpc_status) {
1458 ret = data->rpc_status;
1459 goto err;
1460 }
1461 /* cached opens have already been processed */
1462 goto update;
e23008ec
AA		 1463 }
1464
e23008ec
AA		 1465 ret = nfs_refresh_inode(inode, &data->f_attr);
1466 if (ret)
1467 goto err;
1468
1469 if (data->o_res.delegation_type != 0)
1470 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1471update:
e23008ec
AA		 1472 update_open_stateid(state, &data->o_res.stateid, NULL,
1473 data->o_arg.fmode);
d49f042a 1474 atomic_inc(&state->count);
e23008ec
AA		 1475
1476 return state;
1477err:
1478 return ERR_PTR(ret);
1479
1480}
1481
1482static struct nfs4_state *
1483_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1484{
1485 struct inode *inode;
1486 struct nfs4_state *state = NULL;
1b370bc2 1487 int ret;
24ac23ab 1488
aac00a8d 1489 if (!data->rpc_done) {
6ee41268 1490 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1491 goto out;
1492 }
1493
1b370bc2 1494 ret = -EAGAIN;
24ac23ab 1495 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1496 goto err;
1775fd3e 1497 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1498 ret = PTR_ERR(inode);
03f28e3a 1499 if (IS_ERR(inode))
1b370bc2
TM		 1500 goto err;
1501 ret = -ENOMEM;
24ac23ab
TM		 1502 state = nfs4_get_open_state(inode, data->owner);
1503 if (state == NULL)
1b370bc2 1504 goto err_put_inode;
e23008ec
AA		 1505 if (data->o_res.delegation_type != 0)
1506 nfs4_opendata_check_deleg(data, state);
34310430 1507 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1508 data->o_arg.fmode);
24ac23ab 1509 iput(inode);
aac00a8d 1510out:
7aa262b5 1511 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1512 return state;
1b370bc2
TM		 1513err_put_inode:
1514 iput(inode);
1515err:
1516 return ERR_PTR(ret);
24ac23ab
TM		 1517}
1518
e23008ec
AA		 1519static struct nfs4_state *
1520nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1521{
1522 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1523 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1524 return _nfs4_opendata_to_nfs4_state(data);
1525}
1526
864472e9
TM		 1527static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1528{
1529 struct nfs_inode *nfsi = NFS_I(state->inode);
1530 struct nfs_open_context *ctx;
1531
1532 spin_lock(&state->inode->i_lock);
1533 list_for_each_entry(ctx, &nfsi->open_files, list) {
1534 if (ctx->state != state)
1535 continue;
1536 get_nfs_open_context(ctx);
1537 spin_unlock(&state->inode->i_lock);
1538 return ctx;
1539 }
1540 spin_unlock(&state->inode->i_lock);
1541 return ERR_PTR(-ENOENT);
1542}
1543
4a1c0893
TM		 1544static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1545 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1546{
1547 struct nfs4_opendata *opendata;
1548
4a1c0893 1549 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1550 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1551 if (opendata == NULL)
1552 return ERR_PTR(-ENOMEM);
1553 opendata->state = state;
1554 atomic_inc(&state->count);
1555 return opendata;
1556}
1557
dc0b027d 1558static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1559{
2ced46c2 1560 struct nfs4_state *newstate;
864472e9
TM		 1561 int ret;
1562
39f897fd
N		 1563 if ((opendata->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR ||
1564 opendata->o_arg.claim == NFS4_OPEN_CLAIM_DELEG_CUR_FH) &&
1565 (opendata->o_arg.u.delegation_type & fmode) != fmode)
1566 /* This mode can't have been delegated, so we must have
1567 * a valid open_stateid to cover it - not need to reclaim.
1568 */
1569 return 0;
dc0b027d
TM		 1570 opendata->o_arg.open_flags = 0;
1571 opendata->o_arg.fmode = fmode;
be36e185
TM		 1572 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1573 NFS_SB(opendata->dentry->d_sb),
1574 fmode, 0);
2ced46c2
TM		 1575 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1576 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1577 nfs4_init_opendata_res(opendata);
b257957e 1578 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1579 if (ret != 0)
1580 return ret;
2ced46c2 1581 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1582 if (IS_ERR(newstate))
1583 return PTR_ERR(newstate);
643168c2 1584 nfs4_close_state(newstate, fmode);
2ced46c2 1585 *res = newstate;
864472e9
TM		 1586 return 0;
1587}
1588
1589static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1590{
864472e9 1591 struct nfs4_state *newstate;
864472e9
TM		 1592 int ret;
1593
4f14c194
TM		 1594 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1595 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1596 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1597 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1598 /* memory barrier prior to reading state->n_* */
2ced46c2 1599 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1600 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1601 smp_rmb();
1602 if (state->n_rdwr != 0) {
2ced46c2 1603 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1604 if (ret != 0)
1605 return ret;
2ced46c2
TM		 1606 if (newstate != state)
1607 return -ESTALE;
864472e9
TM		 1608 }
1609 if (state->n_wronly != 0) {
2ced46c2 1610 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1611 if (ret != 0)
1612 return ret;
2ced46c2
TM		 1613 if (newstate != state)
1614 return -ESTALE;
864472e9
TM		 1615 }
1616 if (state->n_rdonly != 0) {
2ced46c2 1617 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1618 if (ret != 0)
1619 return ret;
2ced46c2
TM		 1620 if (newstate != state)
1621 return -ESTALE;
864472e9 1622 }
1ac7e2fd
TM		 1623 /*
1624 * We may have performed cached opens for all three recoveries.
1625 * Check if we need to update the current stateid.
1626 */
1627 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1628 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1629 write_seqlock(&state->seqlock);
1ac7e2fd 1630 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1631 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1632 write_sequnlock(&state->seqlock);
1ac7e2fd 1633 }
864472e9
TM		 1634 return 0;
1635}
1636
1da177e4
LT		 1637/*
1638 * OPEN_RECLAIM:
1639 * reclaim state on the server after a reboot.
1da177e4 1640 */
539cd03a 1641static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1642{
1ac7e2fd 1643 struct nfs_delegation *delegation;
864472e9 1644 struct nfs4_opendata *opendata;
dc0b027d 1645 fmode_t delegation_type = 0;
1da177e4
LT		 1646 int status;
1647
4a1c0893
TM		 1648 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1649 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1650 if (IS_ERR(opendata))
1651 return PTR_ERR(opendata);
1ac7e2fd
TM		 1652 rcu_read_lock();
1653 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1654 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1655 delegation_type = delegation->type;
1ac7e2fd 1656 rcu_read_unlock();
864472e9
TM		 1657 opendata->o_arg.u.delegation_type = delegation_type;
1658 status = nfs4_open_recover(opendata, state);
c6d00e63 1659 nfs4_opendata_put(opendata);
1da177e4
LT		 1660 return status;
1661}
1662
539cd03a 1663static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1664{
1665 struct nfs_server *server = NFS_SERVER(state->inode);
1666 struct nfs4_exception exception = { };
1667 int err;
1668 do {
539cd03a 1669 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1670 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1671 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1672 continue;
168667c4 1673 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1674 break;
1675 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1676 } while (exception.retry);
1677 return err;
1678}
1679
864472e9
TM		 1680static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1681{
1682 struct nfs_open_context *ctx;
1683 int ret;
1684
1685 ctx = nfs4_state_find_open_context(state);
1686 if (IS_ERR(ctx))
91876b13 1687 return -EAGAIN;
539cd03a 1688 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1689 put_nfs_open_context(ctx);
1690 return ret;
1691}
1692
db4f2e63 1693static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1694{
be76b5b6
TM		 1695 switch (err) {
1696 default:
1697 printk(KERN_ERR "NFS: %s: unhandled error "
1698 "%d.\n", __func__, err);
1699 case 0:
1700 case -ENOENT:
8eee52af 1701 case -EAGAIN:
be76b5b6
TM		 1702 case -ESTALE:
1703 break;
1704 case -NFS4ERR_BADSESSION:
1705 case -NFS4ERR_BADSLOT:
1706 case -NFS4ERR_BAD_HIGH_SLOT:
1707 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1708 case -NFS4ERR_DEADSESSION:
1709 set_bit(NFS_DELEGATED_STATE, &state->flags);
1710 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1711 return -EAGAIN;
1712 case -NFS4ERR_STALE_CLIENTID:
1713 case -NFS4ERR_STALE_STATEID:
1714 set_bit(NFS_DELEGATED_STATE, &state->flags);
1715 case -NFS4ERR_EXPIRED:
1716 /* Don't recall a delegation if it was lost */
1717 nfs4_schedule_lease_recovery(server->nfs_client);
1718 return -EAGAIN;
352297b9
CL		 1719 case -NFS4ERR_MOVED:
1720 nfs4_schedule_migration_recovery(server);
1721 return -EAGAIN;
8ef2f8d4
CL		 1722 case -NFS4ERR_LEASE_MOVED:
1723 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1724 return -EAGAIN;
be76b5b6
TM		 1725 case -NFS4ERR_DELEG_REVOKED:
1726 case -NFS4ERR_ADMIN_REVOKED:
1727 case -NFS4ERR_BAD_STATEID:
db4f2e63 1728 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1729 nfs_inode_find_state_and_recover(state->inode,
1730 stateid);
1731 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1732 return -EAGAIN;
be76b5b6
TM		 1733 case -NFS4ERR_DELAY:
1734 case -NFS4ERR_GRACE:
1735 set_bit(NFS_DELEGATED_STATE, &state->flags);
1736 ssleep(1);
1737 return -EAGAIN;
db4f2e63
TM		 1738 case -ENOMEM:
1739 case -NFS4ERR_DENIED:
1740 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1741 return 0;
be76b5b6 1742 }
1da177e4
LT		 1743 return err;
1744}
1745
db4f2e63
TM		 1746int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1747{
1748 struct nfs_server *server = NFS_SERVER(state->inode);
1749 struct nfs4_opendata *opendata;
1750 int err;
1751
1752 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1753 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1754 if (IS_ERR(opendata))
1755 return PTR_ERR(opendata);
1756 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1757 err = nfs4_open_recover(opendata, state);
1758 nfs4_opendata_put(opendata);
1759 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1760}
1761
be05c860
CL		 1762static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1763{
1764 struct nfs4_opendata *data = calldata;
1765
cb04ad2a
PT		 1766 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1767 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 1768}
1769
cdd4e68b
TM		 1770static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1771{
1772 struct nfs4_opendata *data = calldata;
1773
17ead6c8 1774 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1775
cdd4e68b 1776 data->rpc_status = task->tk_status;
26e976a8 1777 if (data->rpc_status == 0) {
f597c537 1778 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1779 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1780 renew_lease(data->o_res.server, data->timestamp);
3e309914 1781 data->rpc_done = 1;
26e976a8 1782 }
cdd4e68b
TM		 1783}
1784
1785static void nfs4_open_confirm_release(void *calldata)
1786{
1787 struct nfs4_opendata *data = calldata;
1788 struct nfs4_state *state = NULL;
1789
1790 /* If this request hasn't been cancelled, do nothing */
1791 if (data->cancelled == 0)
1792 goto out_free;
1793 /* In case of error, no cleanup! */
3e309914 1794 if (!data->rpc_done)
cdd4e68b 1795 goto out_free;
cdd4e68b 1796 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1797 if (!IS_ERR(state))
643168c2 1798 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1799out_free:
c6d00e63 1800 nfs4_opendata_put(data);
cdd4e68b
TM		 1801}
1802
1803static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1804 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1805 .rpc_call_done = nfs4_open_confirm_done,
1806 .rpc_release = nfs4_open_confirm_release,
1807};
1808
1809/*
1810 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1811 */
1812static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1813{
2b0143b5 1814 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 1815 struct rpc_task *task;
5138fde0
TM		 1816 struct rpc_message msg = {
1817 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1818 .rpc_argp = &data->c_arg,
1819 .rpc_resp = &data->c_res,
1820 .rpc_cred = data->owner->so_cred,
1821 };
c970aa85
TM		 1822 struct rpc_task_setup task_setup_data = {
1823 .rpc_client = server->client,
5138fde0 1824 .rpc_message = &msg,
c970aa85
TM		 1825 .callback_ops = &nfs4_open_confirm_ops,
1826 .callback_data = data,
101070ca 1827 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1828 .flags = RPC_TASK_ASYNC,
1829 };
1da177e4
LT		 1830 int status;
1831
17ead6c8 1832 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1833 kref_get(&data->kref);
3e309914
TM		 1834 data->rpc_done = 0;
1835 data->rpc_status = 0;
5138fde0 1836 data->timestamp = jiffies;
c970aa85 1837 task = rpc_run_task(&task_setup_data);
7a1218a2 1838 if (IS_ERR(task))
cdd4e68b 1839 return PTR_ERR(task);
cdd4e68b
TM		 1840 status = nfs4_wait_for_completion_rpc_task(task);
1841 if (status != 0) {
1842 data->cancelled = 1;
1843 smp_wmb();
1844 } else
1845 status = data->rpc_status;
e6b3c4db 1846 rpc_put_task(task);
1da177e4
LT		 1847 return status;
1848}
1849
24ac23ab 1850static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1851{
24ac23ab
TM		 1852 struct nfs4_opendata *data = calldata;
1853 struct nfs4_state_owner *sp = data->owner;
549b19cc 1854 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1855
24ac23ab 1856 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1857 goto out_wait;
aac00a8d
TM		 1858 /*
1859 * Check if we still need to send an OPEN call, or if we can use
1860 * a delegation instead.
1861 */
1862 if (data->state != NULL) {
1863 struct nfs_delegation *delegation;
1864
dc0b027d 1865 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1866 goto out_no_action;
aac00a8d
TM		 1867 rcu_read_lock();
1868 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1869 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1870 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1871 can_open_delegated(delegation, data->o_arg.fmode))
1872 goto unlock_no_action;
aac00a8d
TM		 1873 rcu_read_unlock();
1874 }
95b72eb0 1875 /* Update client id. */
549b19cc 1876 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1877 switch (data->o_arg.claim) {
1878 case NFS4_OPEN_CLAIM_PREVIOUS:
1879 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1880 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1881 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1882 case NFS4_OPEN_CLAIM_FH:
1883 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1884 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1885 }
26e976a8 1886 data->timestamp = jiffies;
035168ab 1887 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1888 &data->o_arg.seq_args,
2240a9e2
TM		 1889 &data->o_res.seq_res,
1890 task) != 0)
1891 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1892
1893 /* Set the create mode (note dependency on the session type) */
1894 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1895 if (data->o_arg.open_flags & O_EXCL) {
1896 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1897 if (nfs4_has_persistent_session(clp))
1898 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1899 else if (clp->cl_mvops->minor_version > 0)
1900 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1901 }
6ee41268 1902 return;
652f89f6
TM		 1903unlock_no_action:
1904 rcu_read_unlock();
6ee41268
TM		 1905out_no_action:
1906 task->tk_action = NULL;
c8da19b9 1907out_wait:
b75ad4cd 1908 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1909}
1910
24ac23ab
TM		 1911static void nfs4_open_done(struct rpc_task *task, void *calldata)
1912{
1913 struct nfs4_opendata *data = calldata;
1da177e4 1914
24ac23ab 1915 data->rpc_status = task->tk_status;
d898528c 1916
14516c3a
TM		 1917 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1918 return;
d898528c 1919
24ac23ab 1920 if (task->tk_status == 0) {
807d66d8
TM		 1921 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1922 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1923 case S_IFREG:
1924 break;
1925 case S_IFLNK:
24ac23ab 1926 data->rpc_status = -ELOOP;
6f926b5b
TM		 1927 break;
1928 case S_IFDIR:
24ac23ab 1929 data->rpc_status = -EISDIR;
6f926b5b
TM		 1930 break;
1931 default:
24ac23ab 1932 data->rpc_status = -ENOTDIR;
807d66d8 1933 }
6f926b5b 1934 }
26e976a8 1935 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1936 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1937 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1938 }
3e309914 1939 data->rpc_done = 1;
24ac23ab 1940}
6f926b5b 1941
24ac23ab
TM		 1942static void nfs4_open_release(void *calldata)
1943{
1944 struct nfs4_opendata *data = calldata;
1945 struct nfs4_state *state = NULL;
1946
1947 /* If this request hasn't been cancelled, do nothing */
1948 if (data->cancelled == 0)
1949 goto out_free;
1950 /* In case of error, no cleanup! */
3e309914 1951 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1952 goto out_free;
1953 /* In case we need an open_confirm, no cleanup! */
1954 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1955 goto out_free;
24ac23ab 1956 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1957 if (!IS_ERR(state))
643168c2 1958 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1959out_free:
c6d00e63 1960 nfs4_opendata_put(data);
24ac23ab
TM		 1961}
1962
1963static const struct rpc_call_ops nfs4_open_ops = {
1964 .rpc_call_prepare = nfs4_open_prepare,
1965 .rpc_call_done = nfs4_open_done,
1966 .rpc_release = nfs4_open_release,
1967};
1968
b257957e 1969static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab 1970{
2b0143b5 1971 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 1972 struct nfs_server *server = NFS_SERVER(dir);
1973 struct nfs_openargs *o_arg = &data->o_arg;
1974 struct nfs_openres *o_res = &data->o_res;
1975 struct rpc_task *task;
5138fde0
TM		 1976 struct rpc_message msg = {
1977 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1978 .rpc_argp = o_arg,
1979 .rpc_resp = o_res,
1980 .rpc_cred = data->owner->so_cred,
1981 };
c970aa85
TM		 1982 struct rpc_task_setup task_setup_data = {
1983 .rpc_client = server->client,
5138fde0 1984 .rpc_message = &msg,
c970aa85
TM		 1985 .callback_ops = &nfs4_open_ops,
1986 .callback_data = data,
101070ca 1987 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1988 .flags = RPC_TASK_ASYNC,
1989 };
24ac23ab
TM		 1990 int status;
1991
a9c92d6b 1992 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1993 kref_get(&data->kref);
3e309914
TM		 1994 data->rpc_done = 0;
1995 data->rpc_status = 0;
2ced46c2 1996 data->cancelled = 0;
bdeca1b7
TM		 1997 data->is_recover = 0;
1998 if (isrecover) {
8fe72bac 1999 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 2000 data->is_recover = 1;
2001 }
c970aa85 2002 task = rpc_run_task(&task_setup_data);
b257957e
AB		 2003 if (IS_ERR(task))
2004 return PTR_ERR(task);
2005 status = nfs4_wait_for_completion_rpc_task(task);
2006 if (status != 0) {
2007 data->cancelled = 1;
2008 smp_wmb();
2009 } else
2010 status = data->rpc_status;
2011 rpc_put_task(task);
2012
2013 return status;
2014}
2015
2016static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2017{
2b0143b5 2018 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2019 struct nfs_openres *o_res = &data->o_res;
2020 int status;
2021
2022 status = nfs4_run_open_task(data, 1);
2023 if (status != 0 || !data->rpc_done)
2024 return status;
2025
6926afd1
TM		 2026 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2027
b257957e
AB		 2028 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2029 status = _nfs4_proc_open_confirm(data);
2030 if (status != 0)
2031 return status;
2032 }
2033
2034 return status;
2035}
2036
f3792d63
TM		 2037/*
2038 * Additional permission checks in order to distinguish between an
2039 * open for read, and an open for execute. This works around the
2040 * fact that NFSv4 OPEN treats read and execute permissions as being
2041 * the same.
2042 * Note that in the non-execute case, we want to turn off permission
2043 * checking if we just created a new file (POSIX open() semantics).
2044 */
6168f62c
WAA		 2045static int nfs4_opendata_access(struct rpc_cred *cred,
2046 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2047 struct nfs4_state *state, fmode_t fmode,
2048 int openflags)
6168f62c
WAA		 2049{
2050 struct nfs_access_entry cache;
2051 u32 mask;
2052
2053 /* access call failed or for some reason the server doesn't
2054 * support any access modes -- defer access call until later */
2055 if (opendata->o_res.access_supported == 0)
2056 return 0;
2057
2058 mask = 0;
f3792d63
TM		 2059 /*
2060 * Use openflags to check for exec, because fmode won't
2061 * always have FMODE_EXEC set when file open for exec.
2062 */
f8d9a897
WAA		 2063 if (openflags & __FMODE_EXEC) {
2064 /* ONLY check for exec rights */
2065 mask = MAY_EXEC;
f3792d63 2066 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2067 mask = MAY_READ;
6168f62c
WAA		 2068
2069 cache.cred = cred;
2070 cache.jiffies = jiffies;
2071 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2072 nfs_access_add_cache(state->inode, &cache);
2073
bbd3a8ee 2074 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2075 return 0;
2076
2077 /* even though OPEN succeeded, access is denied. Close the file */
2078 nfs4_close_state(state, fmode);
998f40b5 2079 return -EACCES;
6168f62c
WAA		 2080}
2081
b257957e
AB		 2082/*
2083 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2084 */
2085static int _nfs4_proc_open(struct nfs4_opendata *data)
2086{
2b0143b5 2087 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2088 struct nfs_server *server = NFS_SERVER(dir);
2089 struct nfs_openargs *o_arg = &data->o_arg;
2090 struct nfs_openres *o_res = &data->o_res;
2091 int status;
2092
2093 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2094 if (!data->rpc_done)
2095 return status;
2096 if (status != 0) {
2097 if (status == -NFS4ERR_BADNAME &&
2098 !(o_arg->open_flags & O_CREAT))
2099 return -ENOENT;
24ac23ab 2100 return status;
08ef7bd3 2101 }
24ac23ab 2102
6926afd1
TM		 2103 nfs_fattr_map_and_free_names(server, &data->f_attr);
2104
5bc2afc2 2105 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2106 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2107 if (o_arg->open_flags & O_EXCL)
2108 data->file_created = 1;
2109 else if (o_res->cinfo.before != o_res->cinfo.after)
2110 data->file_created = 1;
2111 }
0df5dd4a
TM		 2112 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2113 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2114 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2115 status = _nfs4_proc_open_confirm(data);
1da177e4 2116 if (status != 0)
24ac23ab 2117 return status;
1da177e4
LT		 2118 }
2119 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2120 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2121 return 0;
1da177e4
LT		 2122}
2123
d83217c1
AA		 2124static int nfs4_recover_expired_lease(struct nfs_server *server)
2125{
2126 return nfs4_client_recover_expired_lease(server->nfs_client);
2127}
2128
1da177e4
LT		 2129/*
2130 * OPEN_EXPIRED:
2131 * reclaim state on the server after a network partition.
2132 * Assumes caller holds the appropriate lock
2133 */
539cd03a 2134static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2135{
e56e0b78 2136 struct nfs4_opendata *opendata;
864472e9 2137 int ret;
1da177e4 2138
4a1c0893 2139 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2140 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2141 if (IS_ERR(opendata))
2142 return PTR_ERR(opendata);
864472e9 2143 ret = nfs4_open_recover(opendata, state);
35d05778 2144 if (ret == -ESTALE)
3d4ff43d 2145 d_drop(ctx->dentry);
c6d00e63 2146 nfs4_opendata_put(opendata);
864472e9 2147 return ret;
1da177e4
LT		 2148}
2149
a9ed2e25 2150static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2151{
539cd03a 2152 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2153 struct nfs4_exception exception = { };
2154 int err;
2155
2156 do {
539cd03a 2157 err = _nfs4_open_expired(ctx, state);
42113a75 2158 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2159 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2160 continue;
a9ed2e25
TM		 2161 switch (err) {
2162 default:
2163 goto out;
2164 case -NFS4ERR_GRACE:
2165 case -NFS4ERR_DELAY:
2166 nfs4_handle_exception(server, err, &exception);
2167 err = 0;
2168 }
202b50dc 2169 } while (exception.retry);
a9ed2e25 2170out:
202b50dc
TM		 2171 return err;
2172}
2173
1da177e4
LT		 2174static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2175{
1da177e4 2176 struct nfs_open_context *ctx;
864472e9 2177 int ret;
1da177e4 2178
864472e9
TM		 2179 ctx = nfs4_state_find_open_context(state);
2180 if (IS_ERR(ctx))
91876b13 2181 return -EAGAIN;
539cd03a 2182 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2183 put_nfs_open_context(ctx);
2184 return ret;
1da177e4
LT		 2185}
2186
4dfd4f7a
TM		 2187static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2188{
2189 nfs_remove_bad_delegation(state->inode);
2190 write_seqlock(&state->seqlock);
2191 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2192 write_sequnlock(&state->seqlock);
2193 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2194}
2195
2196static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2197{
2198 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2199 nfs_finish_clear_delegation_stateid(state);
2200}
2201
2202static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2203{
2204 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2205 nfs40_clear_delegation_stateid(state);
2206 return nfs4_open_expired(sp, state);
2207}
2208
f062eb6c 2209#if defined(CONFIG_NFS_V4_1)
0c116cad 2210static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2211{
f062eb6c 2212 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2213 nfs4_stateid stateid;
ab7cb0df 2214 struct nfs_delegation *delegation;
0c116cad
TM		 2215 struct rpc_cred *cred;
2216 int status;
3e60ffdd 2217
ab7cb0df
TM		 2218 /* Get the delegation credential for use by test/free_stateid */
2219 rcu_read_lock();
2220 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2221 if (delegation == NULL) {
ab7cb0df 2222 rcu_read_unlock();
0c116cad
TM		 2223 return;
2224 }
2225
2226 nfs4_stateid_copy(&stateid, &delegation->stateid);
2227 cred = get_rpccred(delegation->cred);
2228 rcu_read_unlock();
2229 status = nfs41_test_stateid(server, &stateid, cred);
2230 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df 2231
3e60ffdd
CL		 2232 if (status != NFS_OK) {
2233 /* Free the stateid unless the server explicitly
2234 * informs us the stateid is unrecognized. */
2235 if (status != -NFS4ERR_BAD_STATEID)
0c116cad
TM		 2236 nfs41_free_stateid(server, &stateid, cred);
2237 nfs_finish_clear_delegation_stateid(state);
3e60ffdd 2238 }
ab7cb0df 2239
0c116cad 2240 put_rpccred(cred);
3e60ffdd
CL		 2241}
2242
2243/**
2244 * nfs41_check_open_stateid - possibly free an open stateid
2245 *
2246 * @state: NFSv4 state for an inode
2247 *
2248 * Returns NFS_OK if recovery for this stateid is now finished.
2249 * Otherwise a negative NFS4ERR value is returned.
2250 */
2251static int nfs41_check_open_stateid(struct nfs4_state *state)
2252{
2253 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2254 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2255 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2256 int status;
2257
2258 /* If a state reset has been done, test_stateid is unneeded */
2259 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2260 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2261 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2262 return -NFS4ERR_BAD_STATEID;
2263
ab7cb0df 2264 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2265 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2266 if (status != NFS_OK) {
2267 /* Free the stateid unless the server explicitly
2268 * informs us the stateid is unrecognized. */
2269 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2270 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2271
2272 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2273 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2274 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2275 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2276 }
2277 return status;
2278}
2279
2280static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2281{
eb64cf96 2282 int status;
b01dd1d8 2283
0c116cad 2284 nfs41_check_delegation_stateid(state);
3e60ffdd 2285 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2286 if (status != NFS_OK)
2287 status = nfs4_open_expired(sp, state);
2288 return status;
f062eb6c
BS		 2289}
2290#endif
2291
aa53ed54
JL		 2292/*
2293 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2294 * fields corresponding to attributes that were used to store the verifier.
2295 * Make sure we clobber those fields in the later setattr call
2296 */
2297static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2298{
2299 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2300 !(sattr->ia_valid & ATTR_ATIME_SET))
2301 sattr->ia_valid |= ATTR_ATIME;
2302
2303 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2304 !(sattr->ia_valid & ATTR_MTIME_SET))
2305 sattr->ia_valid |= ATTR_MTIME;
2306}
2307
c21443c2
TM		 2308static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2309 fmode_t fmode,
2310 int flags,
3efb9722 2311 struct nfs_open_context *ctx)
c21443c2
TM		 2312{
2313 struct nfs4_state_owner *sp = opendata->owner;
2314 struct nfs_server *server = sp->so_server;
275bb307 2315 struct dentry *dentry;
c21443c2
TM		 2316 struct nfs4_state *state;
2317 unsigned int seq;
2318 int ret;
2319
2320 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2321
2322 ret = _nfs4_proc_open(opendata);
dca78001 2323 if (ret != 0)
c21443c2
TM		 2324 goto out;
2325
2326 state = nfs4_opendata_to_nfs4_state(opendata);
2327 ret = PTR_ERR(state);
2328 if (IS_ERR(state))
2329 goto out;
2330 if (server->caps & NFS_CAP_POSIX_LOCK)
2331 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2332
275bb307 2333 dentry = opendata->dentry;
2b0143b5 2334 if (d_really_is_negative(dentry)) {
275bb307
TM		 2335 /* FIXME: Is this d_drop() ever needed? */
2336 d_drop(dentry);
2337 dentry = d_add_unique(dentry, igrab(state->inode));
2338 if (dentry == NULL) {
2339 dentry = opendata->dentry;
2340 } else if (dentry != ctx->dentry) {
2341 dput(ctx->dentry);
2342 ctx->dentry = dget(dentry);
2343 }
2344 nfs_set_verifier(dentry,
2b0143b5 2345 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2346 }
2347
c21443c2
TM		 2348 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2349 if (ret != 0)
2350 goto out;
2351
3efb9722 2352 ctx->state = state;
2b0143b5 2353 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2354 nfs_inode_attach_open_context(ctx);
2355 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2356 nfs4_schedule_stateid_recovery(server, state);
2357 }
c21443c2
TM		 2358out:
2359 return ret;
2360}
2361
1da177e4 2362/*
24ac23ab 2363 * Returns a referenced nfs4_state
1da177e4 2364 */
82be417a 2365static int _nfs4_do_open(struct inode *dir,
4197a055 2366 struct nfs_open_context *ctx,
82be417a
AA		 2367 int flags,
2368 struct iattr *sattr,
5bc2afc2
TM		 2369 struct nfs4_label *label,
2370 int *opened)
1da177e4
LT		 2371{
2372 struct nfs4_state_owner *sp;
2373 struct nfs4_state *state = NULL;
2374 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2375 struct nfs4_opendata *opendata;
4197a055
TM		 2376 struct dentry *dentry = ctx->dentry;
2377 struct rpc_cred *cred = ctx->cred;
2378 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2379 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2380 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2381 struct nfs4_label *olabel = NULL;
aac00a8d 2382 int status;
1da177e4
LT		 2383
2384 /* Protect against reboot recovery conflicts */
1da177e4 2385 status = -ENOMEM;
d1e284d5
TM		 2386 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2387 if (sp == NULL) {
1da177e4
LT		 2388 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2389 goto out_err;
2390 }
58d9714a
TM		 2391 status = nfs4_recover_expired_lease(server);
2392 if (status != 0)
b4454fe1 2393 goto err_put_state_owner;
2b0143b5
DH		 2394 if (d_really_is_positive(dentry))
2395 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2396 status = -ENOMEM;
2b0143b5 2397 if (d_really_is_positive(dentry))
49f9a0fa 2398 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2399 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2400 label, claim, GFP_KERNEL);
e56e0b78 2401 if (opendata == NULL)
95d35cb4 2402 goto err_put_state_owner;
1da177e4 2403
14c43f76
DQ		 2404 if (label) {
2405 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2406 if (IS_ERR(olabel)) {
2407 status = PTR_ERR(olabel);
2408 goto err_opendata_put;
2409 }
2410 }
2411
e911b815
TM		 2412 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2413 if (!opendata->f_attr.mdsthreshold) {
2414 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2415 if (!opendata->f_attr.mdsthreshold)
2416 goto err_free_label;
2417 }
1549210f 2418 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2419 }
2b0143b5
DH		 2420 if (d_really_is_positive(dentry))
2421 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2422
3efb9722 2423 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2424 if (status != 0)
14c43f76 2425 goto err_free_label;
3efb9722 2426 state = ctx->state;
6168f62c 2427
efcbc04e 2428 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 2429 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2430 nfs4_exclusive_attrset(opendata, sattr);
2431
2432 nfs_fattr_init(opendata->o_res.f_attr);
2433 status = nfs4_do_setattr(state->inode, cred,
2434 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2435 state, label, olabel);
2436 if (status == 0) {
f044636d
TM		 2437 nfs_setattr_update_inode(state->inode, sattr,
2438 opendata->o_res.f_attr);
aa9c2669 2439 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2440 }
0ab64e0e 2441 }
5bc2afc2
TM		 2442 if (opendata->file_created)
2443 *opened |= FILE_CREATED;
82be417a 2444
e911b815 2445 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2446 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2447 opendata->f_attr.mdsthreshold = NULL;
2448 }
82be417a 2449
14c43f76
DQ		 2450 nfs4_label_free(olabel);
2451
c6d00e63 2452 nfs4_opendata_put(opendata);
1da177e4 2453 nfs4_put_state_owner(sp);
1da177e4 2454 return 0;
14c43f76
DQ		 2455err_free_label:
2456 nfs4_label_free(olabel);
c6d00e63
TM		 2457err_opendata_put:
2458 nfs4_opendata_put(opendata);
e56e0b78
TM		 2459err_put_state_owner:
2460 nfs4_put_state_owner(sp);
1da177e4 2461out_err:
1da177e4
LT		 2462 return status;
2463}
2464
2465
82be417a 2466static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2467 struct nfs_open_context *ctx,
82be417a
AA		 2468 int flags,
2469 struct iattr *sattr,
5bc2afc2
TM		 2470 struct nfs4_label *label,
2471 int *opened)
1da177e4 2472{
49f9a0fa 2473 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2474 struct nfs4_exception exception = { };
2475 struct nfs4_state *res;
2476 int status;
2477
2478 do {
5bc2afc2 2479 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2480 res = ctx->state;
42113a75 2481 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2482 if (status == 0)
2483 break;
2484 /* NOTE: BAD_SEQID means the server and client disagree about the
2485 * book-keeping w.r.t. state-changing operations
2486 * (OPEN/CLOSE/LOCK/LOCKU...)
2487 * It is actually a sign of a bug on the client or on the server.
2488 *
2489 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2490 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2491 * have unhashed the old state_owner for us, and that we can
2492 * therefore safely retry using a new one. We should still warn
2493 * the user though...
2494 */
2495 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2496 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2497 " returned a bad sequence-id error!\n",
2498 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2499 exception.retry = 1;
2500 continue;
2501 }
550f5747
TM		 2502 /*
2503 * BAD_STATEID on OPEN means that the server cancelled our
2504 * state before it received the OPEN_CONFIRM.
2505 * Recover by retrying the request as per the discussion
2506 * on Page 181 of RFC3530.
2507 */
2508 if (status == -NFS4ERR_BAD_STATEID) {
2509 exception.retry = 1;
2510 continue;
2511 }
aac00a8d
TM		 2512 if (status == -EAGAIN) {
2513 /* We must have found a delegation */
2514 exception.retry = 1;
2515 continue;
2516 }
49f9a0fa
TM		 2517 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2518 continue;
2519 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2520 status, &exception));
2521 } while (exception.retry);
2522 return res;
2523}
2524
659bfcd6
TM		 2525static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2526 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2527 struct nfs4_state *state, struct nfs4_label *ilabel,
2528 struct nfs4_label *olabel)
1da177e4 2529{
3e4f6290 2530 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2531 struct nfs_setattrargs arg = {
3e4f6290 2532 .fh = NFS_FH(inode),
1da177e4
LT		 2533 .iap = sattr,
2534 .server = server,
2535 .bitmask = server->attr_bitmask,
1775fd3e 2536 .label = ilabel,
1da177e4
LT		 2537 };
2538 struct nfs_setattrres res = {
2539 .fattr = fattr,
1775fd3e 2540 .label = olabel,
1da177e4
LT		 2541 .server = server,
2542 };
2543 struct rpc_message msg = {
659bfcd6
TM		 2544 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2545 .rpc_argp = &arg,
2546 .rpc_resp = &res,
2547 .rpc_cred = cred,
1da177e4 2548 };
26e976a8 2549 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2550 fmode_t fmode;
2551 bool truncate;
65e4308d 2552 int status;
1da177e4 2553
aa9c2669
DQ		 2554 arg.bitmask = nfs4_bitmask(server, ilabel);
2555 if (ilabel)
2556 arg.bitmask = nfs4_bitmask(server, olabel);
2557
0e574af1 2558 nfs_fattr_init(fattr);
1da177e4 2559
ee3ae84e
TM		 2560 /* Servers should only apply open mode checks for file size changes */
2561 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2562 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2563
2564 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2565 /* Use that stateid */
0418dae1 2566 } else if (truncate && state != NULL) {
2a369153
TM		 2567 struct nfs_lockowner lockowner = {
2568 .l_owner = current->files,
2569 .l_pid = current->tgid,
2570 };
0418dae1
TM		 2571 if (!nfs4_valid_open_stateid(state))
2572 return -EBADF;
2573 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2574 &lockowner) == -EIO)
2575 return -EBADF;
08e9eac4 2576 } else
f597c537 2577 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2578
7c513058 2579 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2580 if (status == 0 && state != NULL)
2581 renew_lease(server, timestamp);
65e4308d 2582 return status;
1da177e4
LT		 2583}
2584
659bfcd6
TM		 2585static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2586 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2587 struct nfs4_state *state, struct nfs4_label *ilabel,
2588 struct nfs4_label *olabel)
1da177e4 2589{
3e4f6290 2590 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2591 struct nfs4_exception exception = {
2592 .state = state,
3114ea7a 2593 .inode = inode,
a1d0b5ee 2594 };
1da177e4
LT		 2595 int err;
2596 do {
1775fd3e 2597 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2598 trace_nfs4_setattr(inode, err);
451146be
TM		 2599 switch (err) {
2600 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2601 if (!(sattr->ia_valid & ATTR_SIZE)) {
2602 pr_warn_once("NFSv4: server %s is incorrectly "
2603 "applying open mode checks to "
2604 "a SETATTR that is not "
2605 "changing file size.\n",
2606 server->nfs_client->cl_hostname);
2607 }
451146be
TM		 2608 if (state && !(state->state & FMODE_WRITE)) {
2609 err = -EBADF;
2610 if (sattr->ia_valid & ATTR_OPEN)
2611 err = -EACCES;
2612 goto out;
2613 }
2614 }
2615 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2616 } while (exception.retry);
451146be 2617out:
1da177e4
LT		 2618 return err;
2619}
2620
2621struct nfs4_closedata {
2622 struct inode *inode;
2623 struct nfs4_state *state;
2624 struct nfs_closeargs arg;
2625 struct nfs_closeres res;
516a6af6 2626 struct nfs_fattr fattr;
26e976a8 2627 unsigned long timestamp;
f7e8917a
FI		 2628 bool roc;
2629 u32 roc_barrier;
1da177e4
LT		 2630};
2631
963d8fe5 2632static void nfs4_free_closedata(void *data)
9512135d 2633{
963d8fe5
TM		 2634 struct nfs4_closedata *calldata = data;
2635 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2636 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2637
f7e8917a
FI		 2638 if (calldata->roc)
2639 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2640 nfs4_put_open_state(calldata->state);
2641 nfs_free_seqid(calldata->arg.seqid);
9512135d 2642 nfs4_put_state_owner(sp);
322b2b90 2643 nfs_sb_deactive(sb);
9512135d
TM		 2644 kfree(calldata);
2645}
2646
963d8fe5 2647static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2648{
963d8fe5 2649 struct nfs4_closedata *calldata = data;
1da177e4 2650 struct nfs4_state *state = calldata->state;
1da177e4 2651 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2652 nfs4_stateid *res_stateid = NULL;
1da177e4 2653
a3ca5651 2654 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2655 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2656 return;
42113a75 2657 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2658 /* hmm. we are done with the inode, and in the process of freeing
2659 * the state_owner. we keep this around to process errors
2660 */
1da177e4
LT		 2661 switch (task->tk_status) {
2662 case 0:
412f6c4c
TM		 2663 res_stateid = &calldata->res.stateid;
2664 if (calldata->arg.fmode == 0 && calldata->roc)
f7e8917a
FI		 2665 pnfs_roc_set_barrier(state->inode,
2666 calldata->roc_barrier);
26e976a8 2667 renew_lease(server, calldata->timestamp);
412f6c4c 2668 break;
69794ad7 2669 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2670 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2671 case -NFS4ERR_OLD_STATEID:
2672 case -NFS4ERR_BAD_STATEID:
1da177e4 2673 case -NFS4ERR_EXPIRED:
566fcec6 2674 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 2675 &state->open_stateid)) {
566fcec6
TM		 2676 rpc_restart_call_prepare(task);
2677 goto out_release;
2678 }
dc0b027d 2679 if (calldata->arg.fmode == 0)
9e33bed5 2680 break;
1da177e4 2681 default:
8478eaa1 2682 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 2683 rpc_restart_call_prepare(task);
69794ad7
TM		 2684 goto out_release;
2685 }
1da177e4 2686 }
412f6c4c 2687 nfs_clear_open_stateid(state, res_stateid, calldata->arg.fmode);
69794ad7 2688out_release:
72211dbe 2689 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2690 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2691 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2692}
2693
4ce70ada 2694static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2695{
4ce70ada 2696 struct nfs4_closedata *calldata = data;
9512135d 2697 struct nfs4_state *state = calldata->state;
7fdab069 2698 struct inode *inode = calldata->inode;
aee7af35 2699 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2700 int call_close = 0;
9512135d 2701
a3ca5651 2702 dprintk("%s: begin!\n", __func__);
963d8fe5 2703 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2704 goto out_wait;
003707c7 2705
88069f77 2706 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2707 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2708 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2709 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2710 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 2711 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 2712 /* Calculate the change in open mode */
cd9288ff 2713 calldata->arg.fmode = 0;
e7616923 2714 if (state->n_rdwr == 0) {
cd9288ff
TM		 2715 if (state->n_rdonly == 0)
2716 call_close |= is_rdonly;
2717 else if (is_rdonly)
2718 calldata->arg.fmode |= FMODE_READ;
2719 if (state->n_wronly == 0)
2720 call_close |= is_wronly;
2721 else if (is_wronly)
2722 calldata->arg.fmode |= FMODE_WRITE;
2723 } else if (is_rdwr)
2724 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2725
2726 if (calldata->arg.fmode == 0)
2727 call_close |= is_rdwr;
2728
5d422301
TM		 2729 if (!nfs4_valid_open_stateid(state))
2730 call_close = 0;
4cecb76f 2731 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2732
2733 if (!call_close) {
963d8fe5 2734 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2735 goto out_no_action;
9512135d 2736 }
88069f77 2737
f7e8917a 2738 if (calldata->arg.fmode == 0) {
88069f77 2739 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
f7e8917a 2740 if (calldata->roc &&
b9536ad5
AA		 2741 pnfs_roc_drain(inode, &calldata->roc_barrier, task)) {
2742 nfs_release_seqid(calldata->arg.seqid);
c8da19b9 2743 goto out_wait;
b9536ad5 2744 }
f7e8917a 2745 }
6ae37339
TM		 2746 calldata->arg.share_access =
2747 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2748 calldata->arg.fmode, 0);
88069f77 2749
516a6af6 2750 nfs_fattr_init(calldata->res.fattr);
26e976a8 2751 calldata->timestamp = jiffies;
7fdab069 2752 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2753 &calldata->arg.seq_args,
2754 &calldata->res.seq_res,
2240a9e2
TM		 2755 task) != 0)
2756 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2757 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2758 return;
2759out_no_action:
2760 task->tk_action = NULL;
2761out_wait:
2762 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2763}
2764
963d8fe5 2765static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2766 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2767 .rpc_call_done = nfs4_close_done,
2768 .rpc_release = nfs4_free_closedata,
2769};
2770
fe08c546
PT		 2771static bool nfs4_roc(struct inode *inode)
2772{
40dd4b7a 2773 if (!nfs_have_layout(inode))
fe08c546 2774 return false;
fe08c546
PT		 2775 return pnfs_roc(inode);
2776}
2777
1da177e4
LT		 2778/*
2779 * It is possible for data to be read/written from a mem-mapped file
2780 * after the sys_close call (which hits the vfs layer as a flush).
2781 * This means that we can't safely call nfsv4 close on a file until
2782 * the inode is cleared. This in turn means that we are not good
2783 * NFSv4 citizens - we do not indicate to the server to update the file's
2784 * share state even when we are done with one of the three share
2785 * stateid's in the inode.
2786 *
2787 * NOTE: Caller must be holding the sp->so_owner semaphore!
2788 */
1f7977c1 2789int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2790{
4a35bd41 2791 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 2792 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 2793 struct nfs4_closedata *calldata;
b39e625b
TM		 2794 struct nfs4_state_owner *sp = state->owner;
2795 struct rpc_task *task;
5138fde0
TM		 2796 struct rpc_message msg = {
2797 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2798 .rpc_cred = state->owner->so_cred,
2799 };
c970aa85
TM		 2800 struct rpc_task_setup task_setup_data = {
2801 .rpc_client = server->client,
5138fde0 2802 .rpc_message = &msg,
c970aa85 2803 .callback_ops = &nfs4_close_ops,
101070ca 2804 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2805 .flags = RPC_TASK_ASYNC,
2806 };
9512135d 2807 int status = -ENOMEM;
1da177e4 2808
fa940720
WAA		 2809 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2810 &task_setup_data.rpc_client, &msg);
2811
8535b2be 2812 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2813 if (calldata == NULL)
9512135d 2814 goto out;
a9c92d6b 2815 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2816 calldata->inode = state->inode;
1da177e4 2817 calldata->state = state;
4a35bd41 2818 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 2819 /* Serialization for the sequence id */
63f5f796
TM		 2820 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2821 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 2822 if (IS_ERR(calldata->arg.seqid))
9512135d 2823 goto out_free_calldata;
dc0b027d 2824 calldata->arg.fmode = 0;
a65318bf 2825 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2826 calldata->res.fattr = &calldata->fattr;
c1d51931 2827 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2828 calldata->res.server = server;
fe08c546 2829 calldata->roc = nfs4_roc(state->inode);
643168c2 2830 nfs_sb_active(calldata->inode->i_sb);
9512135d 2831
1174dd1f
TM		 2832 msg.rpc_argp = &calldata->arg;
2833 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2834 task_setup_data.callback_data = calldata;
2835 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2836 if (IS_ERR(task))
2837 return PTR_ERR(task);
a49c3c77
TM		 2838 status = 0;
2839 if (wait)
2840 status = rpc_wait_for_completion_task(task);
b39e625b 2841 rpc_put_task(task);
a49c3c77 2842 return status;
9512135d
TM		 2843out_free_calldata:
2844 kfree(calldata);
2845out:
b39e625b
TM		 2846 nfs4_put_open_state(state);
2847 nfs4_put_state_owner(sp);
9512135d 2848 return status;
1da177e4
LT		 2849}
2850
2b484297 2851static struct inode *
5bc2afc2
TM		 2852nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2853 int open_flags, struct iattr *attr, int *opened)
1da177e4 2854{
1da177e4 2855 struct nfs4_state *state;
aa9c2669
DQ		 2856 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2857
2858 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2859
565277f6 2860 /* Protect against concurrent sillydeletes */
5bc2afc2 2861 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2862
2863 nfs4_label_release_security(label);
2864
f46e0bd3
TM		 2865 if (IS_ERR(state))
2866 return ERR_CAST(state);
275bb307 2867 return state->inode;
1da177e4
LT		 2868}
2869
1185a552 2870static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2871{
2872 if (ctx->state == NULL)
2873 return;
2874 if (is_sync)
643168c2 2875 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2876 else
643168c2 2877 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2878}
1da177e4 2879
b944dba3
TM		 2880#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2881#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 2882#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 2883
1da177e4
LT		 2884static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2885{
43652ad5
BH		 2886 struct nfs4_server_caps_arg args = {
2887 .fhandle = fhandle,
2888 };
1da177e4
LT		 2889 struct nfs4_server_caps_res res = {};
2890 struct rpc_message msg = {
2891 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2892 .rpc_argp = &args,
1da177e4
LT		 2893 .rpc_resp = &res,
2894 };
2895 int status;
2896
7c513058 2897 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2898 if (status == 0) {
b944dba3
TM		 2899 /* Sanity check the server answers */
2900 switch (server->nfs_client->cl_minorversion) {
2901 case 0:
2902 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2903 res.attr_bitmask[2] = 0;
2904 break;
2905 case 1:
2906 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2907 break;
2908 case 2:
2909 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2910 }
1da177e4 2911 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2912 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2913 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2914 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2915 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 2916 NFS_CAP_CTIME|NFS_CAP_MTIME|
2917 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 2918 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2919 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 2920 server->caps |= NFS_CAP_ACLS;
2921 if (res.has_links != 0)
2922 server->caps |= NFS_CAP_HARDLINKS;
2923 if (res.has_symlinks != 0)
2924 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2925 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2926 server->caps |= NFS_CAP_FILEID;
2927 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2928 server->caps |= NFS_CAP_MODE;
2929 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2930 server->caps |= NFS_CAP_NLINK;
2931 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2932 server->caps |= NFS_CAP_OWNER;
2933 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2934 server->caps |= NFS_CAP_OWNER_GROUP;
2935 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2936 server->caps |= NFS_CAP_ATIME;
2937 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2938 server->caps |= NFS_CAP_CTIME;
2939 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2940 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2941#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2942 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2943 server->caps |= NFS_CAP_SECURITY_LABEL;
2944#endif
2945 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2946 sizeof(server->attr_bitmask));
b944dba3 2947 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 2948
a65318bf
TM		 2949 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2950 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2951 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 2952 server->cache_consistency_bitmask[2] = 0;
1da177e4 2953 server->acl_bitmask = res.acl_bitmask;
264e6351 2954 server->fh_expire_type = res.fh_expire_type;
1da177e4 2955 }
cccef3b9 2956
1da177e4
LT		 2957 return status;
2958}
2959
55a97593 2960int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2961{
2962 struct nfs4_exception exception = { };
2963 int err;
2964 do {
2965 err = nfs4_handle_exception(server,
2966 _nfs4_server_capabilities(server, fhandle),
2967 &exception);
2968 } while (exception.retry);
2969 return err;
2970}
2971
2972static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2973 struct nfs_fsinfo *info)
2974{
aa9c2669 2975 u32 bitmask[3];
1da177e4 2976 struct nfs4_lookup_root_arg args = {
aa9c2669 2977 .bitmask = bitmask,
1da177e4
LT		 2978 };
2979 struct nfs4_lookup_res res = {
2980 .server = server,
0e574af1 2981 .fattr = info->fattr,
1da177e4
LT		 2982 .fh = fhandle,
2983 };
2984 struct rpc_message msg = {
2985 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2986 .rpc_argp = &args,
2987 .rpc_resp = &res,
2988 };
008f55d0 2989
aa9c2669
DQ		 2990 bitmask[0] = nfs4_fattr_bitmap[0];
2991 bitmask[1] = nfs4_fattr_bitmap[1];
2992 /*
2993 * Process the label in the upcoming getfattr
2994 */
2995 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2996
0e574af1 2997 nfs_fattr_init(info->fattr);
7c513058 2998 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2999}
3000
3001static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3002 struct nfs_fsinfo *info)
3003{
3004 struct nfs4_exception exception = { };
3005 int err;
3006 do {
fb8a5ba8 3007 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3008 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3009 switch (err) {
3010 case 0:
3011 case -NFS4ERR_WRONGSEC:
05e9cfb4 3012 goto out;
fb8a5ba8
BS		 3013 default:
3014 err = nfs4_handle_exception(server, err, &exception);
3015 }
1da177e4 3016 } while (exception.retry);
05e9cfb4 3017out:
1da177e4
LT		 3018 return err;
3019}
3020
8f70e95f
BS		 3021static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3022 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3023{
c2190661
TM		 3024 struct rpc_auth_create_args auth_args = {
3025 .pseudoflavor = flavor,
3026 };
8f70e95f
BS		 3027 struct rpc_auth *auth;
3028 int ret;
3029
c2190661 3030 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3031 if (IS_ERR(auth)) {
75bc8821 3032 ret = -EACCES;
8f70e95f
BS		 3033 goto out;
3034 }
3035 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3036out:
3037 return ret;
3038}
3039
9a744ba3
CL		 3040/*
3041 * Retry pseudoroot lookup with various security flavors. We do this when:
3042 *
3043 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3044 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3045 *
3046 * Returns zero on success, or a negative NFS4ERR value, or a
3047 * negative errno value.
3048 */
801a16dc 3049static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3050 struct nfs_fsinfo *info)
1da177e4 3051{
9a744ba3
CL		 3052 /* Per 3530bis 15.33.5 */
3053 static const rpc_authflavor_t flav_array[] = {
3054 RPC_AUTH_GSS_KRB5P,
3055 RPC_AUTH_GSS_KRB5I,
3056 RPC_AUTH_GSS_KRB5,
c4eafe11 3057 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3058 RPC_AUTH_NULL,
3059 };
3060 int status = -EPERM;
3061 size_t i;
6a1a1e34 3062
4d4b69dd
WAA		 3063 if (server->auth_info.flavor_len > 0) {
3064 /* try each flavor specified by user */
3065 for (i = 0; i < server->auth_info.flavor_len; i++) {
3066 status = nfs4_lookup_root_sec(server, fhandle, info,
3067 server->auth_info.flavors[i]);
3068 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3069 continue;
3070 break;
3071 }
3072 } else {
3073 /* no flavors specified by user, try default list */
3074 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3075 status = nfs4_lookup_root_sec(server, fhandle, info,
3076 flav_array[i]);
3077 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3078 continue;
3079 break;
3080 }
8f70e95f 3081 }
9a744ba3 3082
fb8a5ba8
BS		 3083 /*
3084 * -EACCESS could mean that the user doesn't have correct permissions
3085 * to access the mount. It could also mean that we tried to mount
3086 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3087 * existing mount programs don't handle -EACCES very well so it should
3088 * be mapped to -EPERM instead.
3089 */
3090 if (status == -EACCES)
3091 status = -EPERM;
801a16dc
BS		 3092 return status;
3093}
3094
2ed4b95b
CL		 3095static int nfs4_do_find_root_sec(struct nfs_server *server,
3096 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3097{
3098 int mv = server->nfs_client->cl_minorversion;
3099 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3100}
3101
3102/**
3103 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3104 * @server: initialized nfs_server handle
3105 * @fhandle: we fill in the pseudo-fs root file handle
3106 * @info: we fill in an FSINFO struct
5e6b1990 3107 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3108 *
3109 * Returns zero on success, or a negative errno.
801a16dc 3110 */
3028eb2b 3111int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3112 struct nfs_fsinfo *info,
3113 bool auth_probe)
801a16dc 3114{
c7757074 3115 int status = 0;
2ed4b95b 3116
c7757074 3117 if (!auth_probe)
5e6b1990 3118 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3119
3120 if (auth_probe || status == NFS4ERR_WRONGSEC)
2ed4b95b
CL		 3121 status = nfs4_do_find_root_sec(server, fhandle, info);
3122
1da177e4
LT		 3123 if (status == 0)
3124 status = nfs4_server_capabilities(server, fhandle);
3125 if (status == 0)
3126 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3127
c12e87f4 3128 return nfs4_map_errors(status);
1da177e4
LT		 3129}
3130
bae36241
BS		 3131static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3132 struct nfs_fsinfo *info)
3133{
3134 int error;
3135 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3136 struct nfs4_label *label = NULL;
bae36241
BS		 3137
3138 error = nfs4_server_capabilities(server, mntfh);
3139 if (error < 0) {
3140 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3141 return error;
3142 }
3143
14c43f76
DQ		 3144 label = nfs4_label_alloc(server, GFP_KERNEL);
3145 if (IS_ERR(label))
3146 return PTR_ERR(label);
3147
1775fd3e 3148 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3149 if (error < 0) {
3150 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3151 goto err_free_label;
bae36241
BS		 3152 }
3153
3154 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3155 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3156 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3157
14c43f76
DQ		 3158err_free_label:
3159 nfs4_label_free(label);
3160
bae36241
BS		 3161 return error;
3162}
3163
6b97fd3d
MN		 3164/*
3165 * Get locations and (maybe) other attributes of a referral.
3166 * Note that we'll actually follow the referral later when
3167 * we detect fsid mismatch in inode revalidation
3168 */
f05d147f
BS		 3169static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3170 const struct qstr *name, struct nfs_fattr *fattr,
3171 struct nfs_fh *fhandle)
6b97fd3d
MN		 3172{
3173 int status = -ENOMEM;
3174 struct page *page = NULL;
3175 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3176
3177 page = alloc_page(GFP_KERNEL);
3178 if (page == NULL)
3179 goto out;
3180 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3181 if (locations == NULL)
3182 goto out;
3183
f05d147f 3184 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3185 if (status != 0)
3186 goto out;
519ae255
CL		 3187
3188 /*
3189 * If the fsid didn't change, this is a migration event, not a
3190 * referral. Cause us to drop into the exception handler, which
3191 * will kick off migration recovery.
3192 */
6b97fd3d 3193 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3194 dprintk("%s: server did not return a different fsid for"
3195 " a referral at %s\n", __func__, name->name);
519ae255 3196 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3197 goto out;
3198 }
533eb461
AA		 3199 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3200 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3201
533eb461 3202 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3203 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3204 memset(fhandle, 0, sizeof(struct nfs_fh));
3205out:
3206 if (page)
3207 __free_page(page);
5d7ca35a 3208 kfree(locations);
6b97fd3d
MN		 3209 return status;
3210}
3211
1775fd3e
DQ		 3212static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3213 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3214{
3215 struct nfs4_getattr_arg args = {
3216 .fh = fhandle,
3217 .bitmask = server->attr_bitmask,
3218 };
3219 struct nfs4_getattr_res res = {
3220 .fattr = fattr,
1775fd3e 3221 .label = label,
1da177e4
LT		 3222 .server = server,
3223 };
3224 struct rpc_message msg = {
3225 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3226 .rpc_argp = &args,
3227 .rpc_resp = &res,
3228 };
aa9c2669
DQ		 3229
3230 args.bitmask = nfs4_bitmask(server, label);
3231
0e574af1 3232 nfs_fattr_init(fattr);
7c513058 3233 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3234}
3235
1775fd3e
DQ		 3236static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3237 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3238{
3239 struct nfs4_exception exception = { };
3240 int err;
3241 do {
b5f875a9
TM		 3242 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3243 trace_nfs4_getattr(server, fhandle, fattr, err);
3244 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3245 &exception);
3246 } while (exception.retry);
3247 return err;
3248}
3249
3250/*
3251 * The file is not closed if it is opened due to the a request to change
3252 * the size of the file. The open call will not be needed once the
3253 * VFS layer lookup-intents are implemented.
3254 *
3255 * Close is called when the inode is destroyed.
3256 * If we haven't opened the file for O_WRONLY, we
3257 * need to in the size_change case to obtain a stateid.
3258 *
3259 * Got race?
3260 * Because OPEN is always done by name in nfsv4, it is
3261 * possible that we opened a different file by the same
3262 * name. We can recognize this race condition, but we
3263 * can't do anything about it besides returning an error.
3264 *
3265 * This will be fixed with VFS changes (lookup-intent).
3266 */
3267static int
3268nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3269 struct iattr *sattr)
3270{
2b0143b5 3271 struct inode *inode = d_inode(dentry);
659bfcd6 3272 struct rpc_cred *cred = NULL;
d530838b 3273 struct nfs4_state *state = NULL;
14c43f76 3274 struct nfs4_label *label = NULL;
1da177e4
LT		 3275 int status;
3276
88ac815c
PT		 3277 if (pnfs_ld_layoutret_on_setattr(inode) &&
3278 sattr->ia_valid & ATTR_SIZE &&
3279 sattr->ia_size < i_size_read(inode))
24028672 3280 pnfs_commit_and_return_layout(inode);
8a1636c4 3281
0e574af1 3282 nfs_fattr_init(fattr);
1da177e4 3283
2669940d
AA		 3284 /* Deal with open(O_TRUNC) */
3285 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3286 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3287
3288 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3289 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3290 return 0;
3291
d530838b 3292 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3293 if (sattr->ia_valid & ATTR_FILE) {
3294 struct nfs_open_context *ctx;
3295
3296 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3297 if (ctx) {
3298 cred = ctx->cred;
3299 state = ctx->state;
3300 }
659bfcd6 3301 }
08e9eac4 3302
14c43f76
DQ		 3303 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3304 if (IS_ERR(label))
3305 return PTR_ERR(label);
3306
3307 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3308 if (status == 0) {
f044636d 3309 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3310 nfs_setsecurity(inode, fattr, label);
3311 }
14c43f76 3312 nfs4_label_free(label);
1da177e4
LT		 3313 return status;
3314}
3315
0c2e53f1
TM		 3316static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3317 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3318 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3319{
0c2e53f1 3320 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3321 int status;
3322 struct nfs4_lookup_arg args = {
3323 .bitmask = server->attr_bitmask,
0c2e53f1 3324 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3325 .name = name,
3326 };
3327 struct nfs4_lookup_res res = {
3328 .server = server,
3329 .fattr = fattr,
aa9c2669 3330 .label = label,
2b3de441
DH		 3331 .fh = fhandle,
3332 };
3333 struct rpc_message msg = {
3334 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3335 .rpc_argp = &args,
3336 .rpc_resp = &res,
3337 };
3338
aa9c2669
DQ		 3339 args.bitmask = nfs4_bitmask(server, label);
3340
2b3de441
DH		 3341 nfs_fattr_init(fattr);
3342
1da177e4 3343 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3344 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3345 dprintk("NFS reply lookup: %d\n", status);
3346 return status;
3347}
3348
72de53ec 3349static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3350{
7ebb9315 3351 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3352 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3353 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3354 fattr->nlink = 2;
3355}
3356
72de53ec
BS		 3357static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3358 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3359 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3360{
3361 struct nfs4_exception exception = { };
72de53ec 3362 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3363 int err;
3364 do {
1775fd3e 3365 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3366 trace_nfs4_lookup(dir, name, err);
72de53ec 3367 switch (err) {
08ef7bd3 3368 case -NFS4ERR_BADNAME:
72de53ec
BS		 3369 err = -ENOENT;
3370 goto out;
0c2e53f1 3371 case -NFS4ERR_MOVED:
f05d147f 3372 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3373 if (err == -NFS4ERR_MOVED)
3374 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3375 goto out;
0c2e53f1 3376 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3377 err = -EPERM;
3378 if (client != *clnt)
3379 goto out;
66b06860 3380 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3381 if (IS_ERR(client))
3382 return PTR_ERR(client);
3383
3384 exception.retry = 1;
3385 break;
3386 default:
3387 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3388 }
1da177e4 3389 } while (exception.retry);
72de53ec
BS		 3390
3391out:
3392 if (err == 0)
3393 *clnt = client;
3394 else if (client != *clnt)
3395 rpc_shutdown_client(client);
3396
1da177e4
LT		 3397 return err;
3398}
3399
80a16b21 3400static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3401 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3402 struct nfs4_label *label)
72de53ec
BS		 3403{
3404 int status;
3405 struct rpc_clnt *client = NFS_CLIENT(dir);
3406
1775fd3e 3407 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3408 if (client != NFS_CLIENT(dir)) {
3409 rpc_shutdown_client(client);
3410 nfs_fixup_secinfo_attributes(fattr);
3411 }
3412 return status;
3413}
3414
f05d147f
BS		 3415struct rpc_clnt *
3416nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3417 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3418{
b72888cb 3419 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3420 int status;
f05d147f 3421
1775fd3e 3422 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3423 if (status < 0)
f05d147f 3424 return ERR_PTR(status);
b72888cb 3425 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3426}
3427
1da177e4
LT		 3428static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3429{
76b32999 3430 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3431 struct nfs4_accessargs args = {
3432 .fh = NFS_FH(inode),
a4980e78 3433 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3434 };
3435 struct nfs4_accessres res = {
3436 .server = server,
1da177e4 3437 };
1da177e4
LT		 3438 struct rpc_message msg = {
3439 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3440 .rpc_argp = &args,
3441 .rpc_resp = &res,
3442 .rpc_cred = entry->cred,
3443 };
3444 int mode = entry->mask;
aa9c2669 3445 int status = 0;
1da177e4
LT		 3446
3447 /*
3448 * Determine which access bits we want to ask for...
3449 */
3450 if (mode & MAY_READ)
3451 args.access |= NFS4_ACCESS_READ;
3452 if (S_ISDIR(inode->i_mode)) {
3453 if (mode & MAY_WRITE)
3454 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3455 if (mode & MAY_EXEC)
3456 args.access |= NFS4_ACCESS_LOOKUP;
3457 } else {
3458 if (mode & MAY_WRITE)
3459 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3460 if (mode & MAY_EXEC)
3461 args.access |= NFS4_ACCESS_EXECUTE;
3462 }
c407d41a
TM		 3463
3464 res.fattr = nfs_alloc_fattr();
3465 if (res.fattr == NULL)
3466 return -ENOMEM;
3467
7c513058 3468 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3469 if (!status) {
6168f62c 3470 nfs_access_set_mask(entry, res.access);
c407d41a 3471 nfs_refresh_inode(inode, res.fattr);
1da177e4 3472 }
c407d41a 3473 nfs_free_fattr(res.fattr);
1da177e4
LT		 3474 return status;
3475}
3476
3477static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3478{
3479 struct nfs4_exception exception = { };
3480 int err;
3481 do {
c1578b76
TM		 3482 err = _nfs4_proc_access(inode, entry);
3483 trace_nfs4_access(inode, err);
3484 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3485 &exception);
3486 } while (exception.retry);
3487 return err;
3488}
3489
3490/*
3491 * TODO: For the time being, we don't try to get any attributes
3492 * along with any of the zero-copy operations READ, READDIR,
3493 * READLINK, WRITE.
3494 *
3495 * In the case of the first three, we want to put the GETATTR
3496 * after the read-type operation -- this is because it is hard
3497 * to predict the length of a GETATTR response in v4, and thus
3498 * align the READ data correctly. This means that the GETATTR
3499 * may end up partially falling into the page cache, and we should
3500 * shift it into the 'tail' of the xdr_buf before processing.
3501 * To do this efficiently, we need to know the total length
3502 * of data received, which doesn't seem to be available outside
3503 * of the RPC layer.
3504 *
3505 * In the case of WRITE, we also want to put the GETATTR after
3506 * the operation -- in this case because we want to make sure
140150db 3507 * we get the post-operation mtime and size.
1da177e4
LT		 3508 *
3509 * Both of these changes to the XDR layer would in fact be quite
3510 * minor, but I decided to leave them for a subsequent patch.
3511 */
3512static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3513 unsigned int pgbase, unsigned int pglen)
3514{
3515 struct nfs4_readlink args = {
3516 .fh = NFS_FH(inode),
3517 .pgbase = pgbase,
3518 .pglen = pglen,
3519 .pages = &page,
3520 };
f50c7000 3521 struct nfs4_readlink_res res;
1da177e4
LT		 3522 struct rpc_message msg = {
3523 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3524 .rpc_argp = &args,
f50c7000 3525 .rpc_resp = &res,
1da177e4
LT		 3526 };
3527
7c513058 3528 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3529}
3530
3531static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3532 unsigned int pgbase, unsigned int pglen)
3533{
3534 struct nfs4_exception exception = { };
3535 int err;
3536 do {
c1578b76
TM		 3537 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3538 trace_nfs4_readlink(inode, err);
3539 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3540 &exception);
3541 } while (exception.retry);
3542 return err;
3543}
3544
1da177e4 3545/*
8867fe58 3546 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3547 */
1da177e4
LT		 3548static int
3549nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3550 int flags)
1da177e4 3551{
aa9c2669 3552 struct nfs4_label l, *ilabel = NULL;
8867fe58 3553 struct nfs_open_context *ctx;
1da177e4 3554 struct nfs4_state *state;
5bc2afc2 3555 int opened = 0;
1da177e4
LT		 3556 int status = 0;
3557
8867fe58
MS		 3558 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3559 if (IS_ERR(ctx))
3560 return PTR_ERR(ctx);
3561
aa9c2669
DQ		 3562 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3563
a8a5da99 3564 sattr->ia_mode &= ~current_umask();
5bc2afc2 3565 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3566 if (IS_ERR(state)) {
3567 status = PTR_ERR(state);
c0204fd2 3568 goto out;
1da177e4 3569 }
1da177e4 3570out:
aa9c2669 3571 nfs4_label_release_security(ilabel);
8867fe58 3572 put_nfs_open_context(ctx);
1da177e4
LT		 3573 return status;
3574}
3575
3576static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3577{
16e42959 3578 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3579 struct nfs_removeargs args = {
1da177e4 3580 .fh = NFS_FH(dir),
26fe5750 3581 .name = *name,
16e42959 3582 };
4fdc17b2 3583 struct nfs_removeres res = {
16e42959 3584 .server = server,
1da177e4 3585 };
1da177e4 3586 struct rpc_message msg = {
4fdc17b2
TM		 3587 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3588 .rpc_argp = &args,
3589 .rpc_resp = &res,
1da177e4 3590 };
778d2817 3591 int status;
1da177e4 3592
7c513058 3593 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3594 if (status == 0)
16e42959 3595 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3596 return status;
3597}
3598
3599static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3600{
3601 struct nfs4_exception exception = { };
3602 int err;
3603 do {
078ea3df
TM		 3604 err = _nfs4_proc_remove(dir, name);
3605 trace_nfs4_remove(dir, name, err);
3606 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3607 &exception);
3608 } while (exception.retry);
3609 return err;
3610}
3611
e4eff1a6 3612static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3613{
e4eff1a6
TM		 3614 struct nfs_server *server = NFS_SERVER(dir);
3615 struct nfs_removeargs *args = msg->rpc_argp;
3616 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3617
e4eff1a6 3618 res->server = server;
1da177e4 3619 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3620 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3621
3622 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3623}
3624
34e137cc
BS		 3625static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3626{
d9afbd1b
TM		 3627 nfs4_setup_sequence(NFS_SERVER(data->dir),
3628 &data->args.seq_args,
3629 &data->res.seq_res,
3630 task);
1da177e4
LT		 3631}
3632
e4eff1a6 3633static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3634{
078ea3df
TM		 3635 struct nfs_unlinkdata *data = task->tk_calldata;
3636 struct nfs_removeres *res = &data->res;
e4eff1a6 3637
14516c3a
TM		 3638 if (!nfs4_sequence_done(task, &res->seq_res))
3639 return 0;
8478eaa1
N		 3640 if (nfs4_async_handle_error(task, res->server, NULL,
3641 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3642 return 0;
3643 update_changeattr(dir, &res->cinfo);
e4eff1a6 3644 return 1;
1da177e4
LT		 3645}
3646
d3d4152a
JL		 3647static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3648{
3649 struct nfs_server *server = NFS_SERVER(dir);
3650 struct nfs_renameargs *arg = msg->rpc_argp;
3651 struct nfs_renameres *res = msg->rpc_resp;
3652
3653 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3654 res->server = server;
a9c92d6b 3655 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3656}
3657
c6bfa1a1
BS		 3658static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3659{
d9afbd1b
TM		 3660 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3661 &data->args.seq_args,
3662 &data->res.seq_res,
3663 task);
d3d4152a
JL		 3664}
3665
3666static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3667 struct inode *new_dir)
3668{
fbc6f7c2
TM		 3669 struct nfs_renamedata *data = task->tk_calldata;
3670 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3671
3672 if (!nfs4_sequence_done(task, &res->seq_res))
3673 return 0;
8478eaa1 3674 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3675 return 0;
3676
3677 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3678 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3679 return 1;
3680}
3681
1da177e4
LT		 3682static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3683{
91ba2eee 3684 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3685 struct nfs4_link_arg arg = {
3686 .fh = NFS_FH(inode),
3687 .dir_fh = NFS_FH(dir),
3688 .name = name,
91ba2eee
TM		 3689 .bitmask = server->attr_bitmask,
3690 };
91ba2eee
TM		 3691 struct nfs4_link_res res = {
3692 .server = server,
1775fd3e 3693 .label = NULL,
1da177e4 3694 };
1da177e4
LT		 3695 struct rpc_message msg = {
3696 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3697 .rpc_argp = &arg,
91ba2eee 3698 .rpc_resp = &res,
1da177e4 3699 };
136f2627
TM		 3700 int status = -ENOMEM;
3701
3702 res.fattr = nfs_alloc_fattr();
778d2817 3703 if (res.fattr == NULL)
136f2627 3704 goto out;
1da177e4 3705
14c43f76
DQ		 3706 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3707 if (IS_ERR(res.label)) {
3708 status = PTR_ERR(res.label);
3709 goto out;
3710 }
aa9c2669 3711 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3712
7c513058 3713 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3714 if (!status) {
3715 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3716 status = nfs_post_op_update_inode(inode, res.fattr);
3717 if (!status)
3718 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3719 }
14c43f76
DQ		 3720
3721
3722 nfs4_label_free(res.label);
3723
136f2627 3724out:
136f2627 3725 nfs_free_fattr(res.fattr);
1da177e4
LT		 3726 return status;
3727}
3728
3729static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3730{
3731 struct nfs4_exception exception = { };
3732 int err;
3733 do {
3734 err = nfs4_handle_exception(NFS_SERVER(inode),
3735 _nfs4_proc_link(inode, dir, name),
3736 &exception);
3737 } while (exception.retry);
3738 return err;
3739}
3740
57dc9a57
TM		 3741struct nfs4_createdata {
3742 struct rpc_message msg;
3743 struct nfs4_create_arg arg;
3744 struct nfs4_create_res res;
3745 struct nfs_fh fh;
3746 struct nfs_fattr fattr;
1775fd3e 3747 struct nfs4_label *label;
57dc9a57
TM		 3748};
3749
3750static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3751 struct qstr *name, struct iattr *sattr, u32 ftype)
3752{
3753 struct nfs4_createdata *data;
3754
3755 data = kzalloc(sizeof(*data), GFP_KERNEL);
3756 if (data != NULL) {
3757 struct nfs_server *server = NFS_SERVER(dir);
3758
14c43f76
DQ		 3759 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3760 if (IS_ERR(data->label))
3761 goto out_free;
3762
57dc9a57
TM		 3763 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3764 data->msg.rpc_argp = &data->arg;
3765 data->msg.rpc_resp = &data->res;
3766 data->arg.dir_fh = NFS_FH(dir);
3767 data->arg.server = server;
3768 data->arg.name = name;
3769 data->arg.attrs = sattr;
3770 data->arg.ftype = ftype;
aa9c2669 3771 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3772 data->res.server = server;
3773 data->res.fh = &data->fh;
3774 data->res.fattr = &data->fattr;
1775fd3e 3775 data->res.label = data->label;
57dc9a57 3776 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3777 }
3778 return data;
14c43f76
DQ		 3779out_free:
3780 kfree(data);
3781 return NULL;
57dc9a57
TM		 3782}
3783
3784static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3785{
7c513058 3786 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3787 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3788 if (status == 0) {
3789 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3790 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3791 }
3792 return status;
3793}
3794
3795static void nfs4_free_createdata(struct nfs4_createdata *data)
3796{
14c43f76 3797 nfs4_label_free(data->label);
57dc9a57
TM		 3798 kfree(data);
3799}
3800
4f390c15 3801static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3802 struct page *page, unsigned int len, struct iattr *sattr,
3803 struct nfs4_label *label)
1da177e4 3804{
57dc9a57
TM		 3805 struct nfs4_createdata *data;
3806 int status = -ENAMETOOLONG;
1da177e4 3807
94a6d753 3808 if (len > NFS4_MAXPATHLEN)
57dc9a57 3809 goto out;
4f390c15 3810
57dc9a57
TM		 3811 status = -ENOMEM;
3812 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3813 if (data == NULL)
3814 goto out;
3815
3816 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3817 data->arg.u.symlink.pages = &page;
3818 data->arg.u.symlink.len = len;
1775fd3e 3819 data->arg.label = label;
1da177e4 3820
57dc9a57
TM		 3821 status = nfs4_do_create(dir, dentry, data);
3822
3823 nfs4_free_createdata(data);
3824out:
1da177e4
LT		 3825 return status;
3826}
3827
4f390c15 3828static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3829 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3830{
3831 struct nfs4_exception exception = { };
aa9c2669 3832 struct nfs4_label l, *label = NULL;
1da177e4 3833 int err;
aa9c2669
DQ		 3834
3835 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3836
1da177e4 3837 do {
078ea3df
TM		 3838 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3839 trace_nfs4_symlink(dir, &dentry->d_name, err);
3840 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3841 &exception);
3842 } while (exception.retry);
aa9c2669
DQ		 3843
3844 nfs4_label_release_security(label);
1da177e4
LT		 3845 return err;
3846}
3847
3848static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3849 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3850{
57dc9a57
TM		 3851 struct nfs4_createdata *data;
3852 int status = -ENOMEM;
1da177e4 3853
57dc9a57
TM		 3854 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3855 if (data == NULL)
3856 goto out;
3857
1775fd3e 3858 data->arg.label = label;
57dc9a57
TM		 3859 status = nfs4_do_create(dir, dentry, data);
3860
3861 nfs4_free_createdata(data);
3862out:
1da177e4
LT		 3863 return status;
3864}
3865
3866static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3867 struct iattr *sattr)
3868{
3869 struct nfs4_exception exception = { };
aa9c2669 3870 struct nfs4_label l, *label = NULL;
1da177e4 3871 int err;
a8a5da99 3872
aa9c2669
DQ		 3873 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3874
a8a5da99 3875 sattr->ia_mode &= ~current_umask();
1da177e4 3876 do {
078ea3df
TM		 3877 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3878 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3879 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3880 &exception);
3881 } while (exception.retry);
aa9c2669
DQ		 3882 nfs4_label_release_security(label);
3883
1da177e4
LT		 3884 return err;
3885}
3886
3887static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3888 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4 3889{
2b0143b5 3890 struct inode *dir = d_inode(dentry);
1da177e4
LT		 3891 struct nfs4_readdir_arg args = {
3892 .fh = NFS_FH(dir),
56e4ebf8 3893 .pages = pages,
1da177e4
LT		 3894 .pgbase = 0,
3895 .count = count,
2b0143b5 3896 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 3897 .plus = plus,
1da177e4
LT		 3898 };
3899 struct nfs4_readdir_res res;
3900 struct rpc_message msg = {
3901 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3902 .rpc_argp = &args,
3903 .rpc_resp = &res,
3904 .rpc_cred = cred,
3905 };
3906 int status;
3907
6de1472f
AV		 3908 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3909 dentry,
eadf4598 3910 (unsigned long long)cookie);
c3f52af3 3911 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3912 res.pgbase = args.pgbase;
7c513058 3913 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3914 if (status >= 0) {
c3f52af3 3915 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3916 status += args.pgbase;
3917 }
c4812998
TM		 3918
3919 nfs_invalidate_atime(dir);
3920
3110ff80 3921 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3922 return status;
3923}
3924
3925static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3926 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3927{
3928 struct nfs4_exception exception = { };
3929 int err;
3930 do {
c1578b76
TM		 3931 err = _nfs4_proc_readdir(dentry, cred, cookie,
3932 pages, count, plus);
2b0143b5
DH		 3933 trace_nfs4_readdir(d_inode(dentry), err);
3934 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 3935 &exception);
3936 } while (exception.retry);
3937 return err;
3938}
3939
3940static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3941 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3942{
57dc9a57
TM		 3943 struct nfs4_createdata *data;
3944 int mode = sattr->ia_mode;
3945 int status = -ENOMEM;
1da177e4 3946
57dc9a57
TM		 3947 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3948 if (data == NULL)
3949 goto out;
3950
1da177e4 3951 if (S_ISFIFO(mode))
57dc9a57 3952 data->arg.ftype = NF4FIFO;
1da177e4 3953 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3954 data->arg.ftype = NF4BLK;
3955 data->arg.u.device.specdata1 = MAJOR(rdev);
3956 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3957 }
3958 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3959 data->arg.ftype = NF4CHR;
3960 data->arg.u.device.specdata1 = MAJOR(rdev);
3961 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3962 } else if (!S_ISSOCK(mode)) {
3963 status = -EINVAL;
3964 goto out_free;
1da177e4 3965 }
1775fd3e 3966
aa9c2669 3967 data->arg.label = label;
57dc9a57 3968 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3969out_free:
57dc9a57
TM		 3970 nfs4_free_createdata(data);
3971out:
1da177e4
LT		 3972 return status;
3973}
3974
3975static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3976 struct iattr *sattr, dev_t rdev)
3977{
3978 struct nfs4_exception exception = { };
aa9c2669 3979 struct nfs4_label l, *label = NULL;
1da177e4 3980 int err;
a8a5da99 3981
aa9c2669
DQ		 3982 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3983
a8a5da99 3984 sattr->ia_mode &= ~current_umask();
1da177e4 3985 do {
078ea3df
TM		 3986 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3987 trace_nfs4_mknod(dir, &dentry->d_name, err);
3988 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3989 &exception);
3990 } while (exception.retry);
aa9c2669
DQ		 3991
3992 nfs4_label_release_security(label);
3993
1da177e4
LT		 3994 return err;
3995}
3996
3997static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3998 struct nfs_fsstat *fsstat)
3999{
4000 struct nfs4_statfs_arg args = {
4001 .fh = fhandle,
4002 .bitmask = server->attr_bitmask,
4003 };
24ad148a
BH		 4004 struct nfs4_statfs_res res = {
4005 .fsstat = fsstat,
4006 };
1da177e4
LT		 4007 struct rpc_message msg = {
4008 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4009 .rpc_argp = &args,
24ad148a 4010 .rpc_resp = &res,
1da177e4
LT		 4011 };
4012
0e574af1 4013 nfs_fattr_init(fsstat->fattr);
7c513058 4014 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4015}
4016
4017static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4018{
4019 struct nfs4_exception exception = { };
4020 int err;
4021 do {
4022 err = nfs4_handle_exception(server,
4023 _nfs4_proc_statfs(server, fhandle, fsstat),
4024 &exception);
4025 } while (exception.retry);
4026 return err;
4027}
4028
4029static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4030 struct nfs_fsinfo *fsinfo)
4031{
4032 struct nfs4_fsinfo_arg args = {
4033 .fh = fhandle,
4034 .bitmask = server->attr_bitmask,
4035 };
3dda5e43
BH		 4036 struct nfs4_fsinfo_res res = {
4037 .fsinfo = fsinfo,
4038 };
1da177e4
LT		 4039 struct rpc_message msg = {
4040 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4041 .rpc_argp = &args,
3dda5e43 4042 .rpc_resp = &res,
1da177e4
LT		 4043 };
4044
7c513058 4045 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4046}
4047
4048static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4049{
4050 struct nfs4_exception exception = { };
83ca7f5a 4051 unsigned long now = jiffies;
1da177e4
LT		 4052 int err;
4053
4054 do {
83ca7f5a 4055 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4056 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 4057 if (err == 0) {
4058 struct nfs_client *clp = server->nfs_client;
4059
4060 spin_lock(&clp->cl_lock);
4061 clp->cl_lease_time = fsinfo->lease_time * HZ;
4062 clp->cl_last_renewal = now;
4063 spin_unlock(&clp->cl_lock);
4064 break;
4065 }
4066 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4067 } while (exception.retry);
4068 return err;
4069}
4070
4071static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4072{
e38eb650
BS		 4073 int error;
4074
0e574af1 4075 nfs_fattr_init(fsinfo->fattr);
e38eb650 4076 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4077 if (error == 0) {
4078 /* block layout checks this! */
4079 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4080 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4081 }
e38eb650
BS		 4082
4083 return error;
1da177e4
LT		 4084}
4085
4086static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4087 struct nfs_pathconf *pathconf)
4088{
4089 struct nfs4_pathconf_arg args = {
4090 .fh = fhandle,
4091 .bitmask = server->attr_bitmask,
4092 };
d45b2989
BH		 4093 struct nfs4_pathconf_res res = {
4094 .pathconf = pathconf,
4095 };
1da177e4
LT		 4096 struct rpc_message msg = {
4097 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4098 .rpc_argp = &args,
d45b2989 4099 .rpc_resp = &res,
1da177e4
LT		 4100 };
4101
4102 /* None of the pathconf attributes are mandatory to implement */
4103 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4104 memset(pathconf, 0, sizeof(*pathconf));
4105 return 0;
4106 }
4107
0e574af1 4108 nfs_fattr_init(pathconf->fattr);
7c513058 4109 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4110}
4111
4112static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4113 struct nfs_pathconf *pathconf)
4114{
4115 struct nfs4_exception exception = { };
4116 int err;
4117
4118 do {
4119 err = nfs4_handle_exception(server,
4120 _nfs4_proc_pathconf(server, fhandle, pathconf),
4121 &exception);
4122 } while (exception.retry);
4123 return err;
4124}
4125
5521abfd 4126int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4127 const struct nfs_open_context *ctx,
4128 const struct nfs_lock_context *l_ctx,
4129 fmode_t fmode)
4130{
4131 const struct nfs_lockowner *lockowner = NULL;
4132
4133 if (l_ctx != NULL)
4134 lockowner = &l_ctx->lockowner;
5521abfd 4135 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4136}
4137EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4138
5521abfd
TM		 4139static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4140 const struct nfs_open_context *ctx,
4141 const struct nfs_lock_context *l_ctx,
4142 fmode_t fmode)
4143{
4144 nfs4_stateid current_stateid;
4145
e1253be0
TM		 4146 /* If the current stateid represents a lost lock, then exit */
4147 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4148 return true;
5521abfd
TM		 4149 return nfs4_stateid_match(stateid, &current_stateid);
4150}
4151
4152static bool nfs4_error_stateid_expired(int err)
4153{
4154 switch (err) {
4155 case -NFS4ERR_DELEG_REVOKED:
4156 case -NFS4ERR_ADMIN_REVOKED:
4157 case -NFS4ERR_BAD_STATEID:
4158 case -NFS4ERR_STALE_STATEID:
4159 case -NFS4ERR_OLD_STATEID:
4160 case -NFS4ERR_OPENMODE:
4161 case -NFS4ERR_EXPIRED:
4162 return true;
4163 }
4164 return false;
4165}
4166
d45f60c6 4167void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4168{
d45f60c6 4169 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4170}
4171
d45f60c6 4172static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4173{
d45f60c6 4174 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4175
d45f60c6
WAA		 4176 trace_nfs4_read(hdr, task->tk_status);
4177 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4178 hdr->args.context->state,
4179 NULL) == -EAGAIN) {
d00c5d43 4180 rpc_restart_call_prepare(task);
ec06c096 4181 return -EAGAIN;
1da177e4 4182 }
8850df99 4183
d45f60c6 4184 __nfs4_read_done_cb(hdr);
1da177e4 4185 if (task->tk_status > 0)
d45f60c6 4186 renew_lease(server, hdr->timestamp);
ec06c096 4187 return 0;
1da177e4
LT		 4188}
4189
5521abfd 4190static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4191 struct nfs_pgio_args *args)
5521abfd
TM		 4192{
4193
4194 if (!nfs4_error_stateid_expired(task->tk_status) ||
4195 nfs4_stateid_is_current(&args->stateid,
4196 args->context,
4197 args->lock_context,
4198 FMODE_READ))
4199 return false;
4200 rpc_restart_call_prepare(task);
4201 return true;
4202}
4203
d45f60c6 4204static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4205{
4206
4207 dprintk("--> %s\n", __func__);
4208
d45f60c6 4209 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4210 return -EAGAIN;
d45f60c6 4211 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4212 return -EAGAIN;
d45f60c6
WAA		 4213 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4214 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4215}
4216
d45f60c6
WAA		 4217static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4218 struct rpc_message *msg)
1da177e4 4219{
d45f60c6
WAA		 4220 hdr->timestamp = jiffies;
4221 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4222 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4223 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4224}
4225
d45f60c6
WAA		 4226static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4227 struct nfs_pgio_header *hdr)
ea7c3303 4228{
d45f60c6
WAA		 4229 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4230 &hdr->args.seq_args,
4231 &hdr->res.seq_res,
9b206149 4232 task))
ef1820f9 4233 return 0;
d45f60c6
WAA		 4234 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4235 hdr->args.lock_context,
4236 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4237 return -EIO;
d45f60c6 4238 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4239 return -EIO;
4240 return 0;
1da177e4
LT		 4241}
4242
d45f60c6
WAA		 4243static int nfs4_write_done_cb(struct rpc_task *task,
4244 struct nfs_pgio_header *hdr)
1da177e4 4245{
d45f60c6 4246 struct inode *inode = hdr->inode;
8478eaa1 4247
d45f60c6
WAA		 4248 trace_nfs4_write(hdr, task->tk_status);
4249 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4250 hdr->args.context->state,
4251 NULL) == -EAGAIN) {
d00c5d43 4252 rpc_restart_call_prepare(task);
788e7a89 4253 return -EAGAIN;
1da177e4 4254 }
4f9838c7 4255 if (task->tk_status >= 0) {
d45f60c6 4256 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4257 nfs_writeback_update_inode(hdr);
4f9838c7 4258 }
788e7a89 4259 return 0;
1da177e4
LT		 4260}
4261
5521abfd 4262static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4263 struct nfs_pgio_args *args)
5521abfd
TM		 4264{
4265
4266 if (!nfs4_error_stateid_expired(task->tk_status) ||
4267 nfs4_stateid_is_current(&args->stateid,
4268 args->context,
4269 args->lock_context,
4270 FMODE_WRITE))
4271 return false;
4272 rpc_restart_call_prepare(task);
4273 return true;
4274}
4275
d45f60c6 4276static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4277{
d45f60c6 4278 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4279 return -EAGAIN;
d45f60c6 4280 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4281 return -EAGAIN;
d45f60c6
WAA		 4282 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4283 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4284}
4285
5a37f851 4286static
d45f60c6 4287bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4288{
5a37f851 4289 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4290 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4291 return false;
4292 /* Otherwise, request attributes if and only if we don't hold
4293 * a delegation
4294 */
011e2a7f 4295 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4296}
a69aef14 4297
d45f60c6
WAA		 4298static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4299 struct rpc_message *msg)
1da177e4 4300{
d45f60c6 4301 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4302
d45f60c6
WAA		 4303 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4304 hdr->args.bitmask = NULL;
4305 hdr->res.fattr = NULL;
7ffd1064 4306 } else
d45f60c6 4307 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4308
d45f60c6
WAA		 4309 if (!hdr->pgio_done_cb)
4310 hdr->pgio_done_cb = nfs4_write_done_cb;
4311 hdr->res.server = server;
4312 hdr->timestamp = jiffies;
1da177e4 4313
bdc7f021 4314 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4315 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4316}
4317
0b7c0153 4318static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4319{
d9afbd1b
TM		 4320 nfs4_setup_sequence(NFS_SERVER(data->inode),
4321 &data->args.seq_args,
4322 &data->res.seq_res,
4323 task);
1da177e4
LT		 4324}
4325
0b7c0153 4326static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4327{
1da177e4 4328 struct inode *inode = data->inode;
14516c3a 4329
cc668ab3 4330 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4331 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4332 NULL, NULL) == -EAGAIN) {
d00c5d43 4333 rpc_restart_call_prepare(task);
788e7a89 4334 return -EAGAIN;
1da177e4 4335 }
788e7a89 4336 return 0;
1da177e4
LT		 4337}
4338
0b7c0153 4339static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4340{
4341 if (!nfs4_sequence_done(task, &data->res.seq_res))
4342 return -EAGAIN;
0b7c0153 4343 return data->commit_done_cb(task, data);
5f452431
FI		 4344}
4345
0b7c0153 4346static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4347{
788e7a89 4348 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4349
0b7c0153
FI		 4350 if (data->commit_done_cb == NULL)
4351 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4352 data->res.server = server;
bdc7f021 4353 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4354 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4355}
4356
9bc4e3ca
CL		 4357struct nfs4_renewdata {
4358 struct nfs_client *client;
4359 unsigned long timestamp;
4360};
4361
1da177e4
LT		 4362/*
4363 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4364 * standalone procedure for queueing an asynchronous RENEW.
4365 */
9bc4e3ca 4366static void nfs4_renew_release(void *calldata)
dc96aef9 4367{
9bc4e3ca
CL		 4368 struct nfs4_renewdata *data = calldata;
4369 struct nfs_client *clp = data->client;
dc96aef9 4370
0851de06
AB		 4371 if (atomic_read(&clp->cl_count) > 1)
4372 nfs4_schedule_state_renewal(clp);
4373 nfs_put_client(clp);
9bc4e3ca 4374 kfree(data);
dc96aef9
AB		 4375}
4376
9bc4e3ca 4377static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4378{
9bc4e3ca
CL		 4379 struct nfs4_renewdata *data = calldata;
4380 struct nfs_client *clp = data->client;
4381 unsigned long timestamp = data->timestamp;
1da177e4 4382
c6d01c6f 4383 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4384 switch (task->tk_status) {
4385 case 0:
4386 break;
4387 case -NFS4ERR_LEASE_MOVED:
4388 nfs4_schedule_lease_moved_recovery(clp);
4389 break;
4390 default:
95baa25c 4391 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4392 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4393 return;
4394 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4395 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4396 return;
4397 }
4398 nfs4_schedule_path_down_recovery(clp);
1da177e4 4399 }
452e9352 4400 do_renew_lease(clp, timestamp);
1da177e4
LT		 4401}
4402
963d8fe5
TM		 4403static const struct rpc_call_ops nfs4_renew_ops = {
4404 .rpc_call_done = nfs4_renew_done,
dc96aef9 4405 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4406};
4407
2f60ea6b 4408static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4409{
4410 struct rpc_message msg = {
4411 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4412 .rpc_argp = clp,
b4454fe1 4413 .rpc_cred = cred,
1da177e4 4414 };
9bc4e3ca 4415 struct nfs4_renewdata *data;
1da177e4 4416
2f60ea6b
TM		 4417 if (renew_flags == 0)
4418 return 0;
0851de06
AB		 4419 if (!atomic_inc_not_zero(&clp->cl_count))
4420 return -EIO;
b569ad34 4421 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4422 if (data == NULL)
4423 return -ENOMEM;
4424 data->client = clp;
4425 data->timestamp = jiffies;
bc7a05ca 4426 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4427 &nfs4_renew_ops, data);
1da177e4
LT		 4428}
4429
8534d4ec 4430static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4431{
4432 struct rpc_message msg = {
4433 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4434 .rpc_argp = clp,
b4454fe1 4435 .rpc_cred = cred,
1da177e4
LT		 4436 };
4437 unsigned long now = jiffies;
4438 int status;
4439
bc7a05ca 4440 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4441 if (status < 0)
4442 return status;
452e9352 4443 do_renew_lease(clp, now);
1da177e4
LT		 4444 return 0;
4445}
4446
aa1870af
BF		 4447static inline int nfs4_server_supports_acls(struct nfs_server *server)
4448{
7dd7d959 4449 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4450}
4451
21f498c2
TM		 4452/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4453 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4454 * the stack.
4455 */
21f498c2 4456#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4457
e9e3d724
NH		 4458static int buf_to_pages_noslab(const void *buf, size_t buflen,
4459 struct page **pages, unsigned int *pgbase)
4460{
4461 struct page *newpage, **spages;
4462 int rc = 0;
4463 size_t len;
4464 spages = pages;
4465
4466 do {
21f498c2 4467 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4468 newpage = alloc_page(GFP_KERNEL);
4469
4470 if (newpage == NULL)
4471 goto unwind;
4472 memcpy(page_address(newpage), buf, len);
4473 buf += len;
4474 buflen -= len;
4475 *pages++ = newpage;
4476 rc++;
4477 } while (buflen != 0);
4478
4479 return rc;
4480
4481unwind:
4482 for(; rc > 0; rc--)
4483 __free_page(spages[rc-1]);
4484 return -ENOMEM;
4485}
4486
e50a1c2e
BF		 4487struct nfs4_cached_acl {
4488 int cached;
4489 size_t len;
3e9d4154 4490 char data[0];
e50a1c2e
BF		 4491};
4492
4493static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4494{
4495 struct nfs_inode *nfsi = NFS_I(inode);
4496
4497 spin_lock(&inode->i_lock);
4498 kfree(nfsi->nfs4_acl);
4499 nfsi->nfs4_acl = acl;
4500 spin_unlock(&inode->i_lock);
4501}
4502
4503static void nfs4_zap_acl_attr(struct inode *inode)
4504{
4505 nfs4_set_cached_acl(inode, NULL);
4506}
4507
4508static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4509{
4510 struct nfs_inode *nfsi = NFS_I(inode);
4511 struct nfs4_cached_acl *acl;
4512 int ret = -ENOENT;
4513
4514 spin_lock(&inode->i_lock);
4515 acl = nfsi->nfs4_acl;
4516 if (acl == NULL)
4517 goto out;
4518 if (buf == NULL) /* user is just asking for length */
4519 goto out_len;
4520 if (acl->cached == 0)
4521 goto out;
4522 ret = -ERANGE; /* see getxattr(2) man page */
4523 if (acl->len > buflen)
4524 goto out;
4525 memcpy(buf, acl->data, acl->len);
4526out_len:
4527 ret = acl->len;
4528out:
4529 spin_unlock(&inode->i_lock);
4530 return ret;
4531}
4532
5794d21e 4533static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4534{
4535 struct nfs4_cached_acl *acl;
b291f1b1 4536 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4537
1f1ea6c2 4538 if (buflen <= PAGE_SIZE) {
b291f1b1 4539 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4540 if (acl == NULL)
4541 goto out;
4542 acl->cached = 1;
5794d21e 4543 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4544 } else {
4545 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4546 if (acl == NULL)
4547 goto out;
4548 acl->cached = 0;
4549 }
4550 acl->len = acl_len;
4551out:
4552 nfs4_set_cached_acl(inode, acl);
4553}
4554
bf118a34
AA		 4555/*
4556 * The getxattr API returns the required buffer length when called with a
4557 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4558 * the required buf. On a NULL buf, we send a page of data to the server
4559 * guessing that the ACL request can be serviced by a page. If so, we cache
4560 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4561 * the cache. If not so, we throw away the page, and cache the required
4562 * length. The next getxattr call will then produce another round trip to
4563 * the server, this time with the input buf of the required size.
4564 */
16b4289c 4565static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4566{
bf118a34 4567 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4568 struct nfs_getaclargs args = {
4569 .fh = NFS_FH(inode),
4570 .acl_pages = pages,
4571 .acl_len = buflen,
4572 };
663c79b3
BH		 4573 struct nfs_getaclres res = {
4574 .acl_len = buflen,
4575 };
aa1870af
BF		 4576 struct rpc_message msg = {
4577 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4578 .rpc_argp = &args,
663c79b3 4579 .rpc_resp = &res,
aa1870af 4580 };
21f498c2
TM		 4581 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4582 int ret = -ENOMEM, i;
aa1870af 4583
bf118a34
AA		 4584 /* As long as we're doing a round trip to the server anyway,
4585 * let's be prepared for a page of acl data. */
4586 if (npages == 0)
4587 npages = 1;
21f498c2
TM		 4588 if (npages > ARRAY_SIZE(pages))
4589 return -ERANGE;
5a006899 4590
bf118a34
AA		 4591 for (i = 0; i < npages; i++) {
4592 pages[i] = alloc_page(GFP_KERNEL);
4593 if (!pages[i])
4594 goto out_free;
e50a1c2e 4595 }
5a006899
SP		 4596
4597 /* for decoding across pages */
4598 res.acl_scratch = alloc_page(GFP_KERNEL);
4599 if (!res.acl_scratch)
4600 goto out_free;
4601
bf118a34
AA		 4602 args.acl_len = npages * PAGE_SIZE;
4603 args.acl_pgbase = 0;
5a006899 4604
de040bec 4605 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4606 __func__, buf, buflen, npages, args.acl_len);
4607 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4608 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4609 if (ret)
4610 goto out_free;
bf118a34 4611
1f1ea6c2
TM		 4612 /* Handle the case where the passed-in buffer is too short */
4613 if (res.acl_flags & NFS4_ACL_TRUNC) {
4614 /* Did the user only issue a request for the acl length? */
4615 if (buf == NULL)
4616 goto out_ok;
e50a1c2e 4617 ret = -ERANGE;
1f1ea6c2 4618 goto out_free;
e50a1c2e 4619 }
1f1ea6c2 4620 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4621 if (buf) {
4622 if (res.acl_len > buflen) {
4623 ret = -ERANGE;
4624 goto out_free;
4625 }
1f1ea6c2 4626 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4627 }
1f1ea6c2
TM		 4628out_ok:
4629 ret = res.acl_len;
e50a1c2e 4630out_free:
bf118a34
AA		 4631 for (i = 0; i < npages; i++)
4632 if (pages[i])
4633 __free_page(pages[i]);
331818f1
TM		 4634 if (res.acl_scratch)
4635 __free_page(res.acl_scratch);
aa1870af
BF		 4636 return ret;
4637}
4638
16b4289c
TM		 4639static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4640{
4641 struct nfs4_exception exception = { };
4642 ssize_t ret;
4643 do {
4644 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4645 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4646 if (ret >= 0)
4647 break;
4648 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4649 } while (exception.retry);
4650 return ret;
4651}
4652
e50a1c2e
BF		 4653static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4654{
4655 struct nfs_server *server = NFS_SERVER(inode);
4656 int ret;
4657
4658 if (!nfs4_server_supports_acls(server))
4659 return -EOPNOTSUPP;
4660 ret = nfs_revalidate_inode(server, inode);
4661 if (ret < 0)
4662 return ret;
08a22b39
AK		 4663 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4664 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4665 ret = nfs4_read_cached_acl(inode, buf, buflen);
4666 if (ret != -ENOENT)
bf118a34
AA		 4667 /* -ENOENT is returned if there is no ACL or if there is an ACL
4668 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4669 return ret;
4670 return nfs4_get_acl_uncached(inode, buf, buflen);
4671}
4672
16b4289c 4673static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4674{
4675 struct nfs_server *server = NFS_SERVER(inode);
4676 struct page *pages[NFS4ACL_MAXPAGES];
4677 struct nfs_setaclargs arg = {
4678 .fh = NFS_FH(inode),
4679 .acl_pages = pages,
4680 .acl_len = buflen,
4681 };
73c403a9 4682 struct nfs_setaclres res;
4b580ee3
BF		 4683 struct rpc_message msg = {
4684 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4685 .rpc_argp = &arg,
73c403a9 4686 .rpc_resp = &res,
4b580ee3 4687 };
21f498c2 4688 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4689 int ret, i;
4b580ee3
BF		 4690
4691 if (!nfs4_server_supports_acls(server))
4692 return -EOPNOTSUPP;
21f498c2
TM		 4693 if (npages > ARRAY_SIZE(pages))
4694 return -ERANGE;
e9e3d724
NH		 4695 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4696 if (i < 0)
4697 return i;
57ec14c5 4698 nfs4_inode_return_delegation(inode);
7c513058 4699 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4700
4701 /*
4702 * Free each page after tx, so the only ref left is
4703 * held by the network stack
4704 */
4705 for (; i > 0; i--)
4706 put_page(pages[i-1]);
4707
08a22b39
AK		 4708 /*
4709 * Acl update can result in inode attribute update.
4710 * so mark the attribute cache invalid.
4711 */
4712 spin_lock(&inode->i_lock);
4713 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4714 spin_unlock(&inode->i_lock);
f41f7418
TM		 4715 nfs_access_zap_cache(inode);
4716 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4717 return ret;
4718}
4719
16b4289c
TM		 4720static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4721{
4722 struct nfs4_exception exception = { };
4723 int err;
4724 do {
c1578b76
TM		 4725 err = __nfs4_proc_set_acl(inode, buf, buflen);
4726 trace_nfs4_set_acl(inode, err);
4727 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4728 &exception);
4729 } while (exception.retry);
4730 return err;
4731}
4732
aa9c2669
DQ		 4733#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4734static int _nfs4_get_security_label(struct inode *inode, void *buf,
4735 size_t buflen)
4736{
4737 struct nfs_server *server = NFS_SERVER(inode);
4738 struct nfs_fattr fattr;
4739 struct nfs4_label label = {0, 0, buflen, buf};
4740
4741 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4742 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4743 .fh = NFS_FH(inode),
4744 .bitmask = bitmask,
4745 };
4746 struct nfs4_getattr_res res = {
4747 .fattr = &fattr,
4748 .label = &label,
4749 .server = server,
4750 };
4751 struct rpc_message msg = {
4752 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4753 .rpc_argp = &arg,
aa9c2669
DQ		 4754 .rpc_resp = &res,
4755 };
4756 int ret;
4757
4758 nfs_fattr_init(&fattr);
4759
fcb63a9b 4760 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4761 if (ret)
4762 return ret;
4763 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4764 return -ENOENT;
4765 if (buflen < label.len)
4766 return -ERANGE;
4767 return 0;
4768}
4769
4770static int nfs4_get_security_label(struct inode *inode, void *buf,
4771 size_t buflen)
4772{
4773 struct nfs4_exception exception = { };
4774 int err;
4775
4776 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4777 return -EOPNOTSUPP;
4778
4779 do {
c1578b76
TM		 4780 err = _nfs4_get_security_label(inode, buf, buflen);
4781 trace_nfs4_get_security_label(inode, err);
4782 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4783 &exception);
4784 } while (exception.retry);
4785 return err;
4786}
4787
4788static int _nfs4_do_set_security_label(struct inode *inode,
4789 struct nfs4_label *ilabel,
4790 struct nfs_fattr *fattr,
4791 struct nfs4_label *olabel)
4792{
4793
4794 struct iattr sattr = {0};
4795 struct nfs_server *server = NFS_SERVER(inode);
4796 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4797 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4798 .fh = NFS_FH(inode),
4799 .iap = &sattr,
4800 .server = server,
4801 .bitmask = bitmask,
4802 .label = ilabel,
4803 };
4804 struct nfs_setattrres res = {
4805 .fattr = fattr,
4806 .label = olabel,
4807 .server = server,
4808 };
4809 struct rpc_message msg = {
4810 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4811 .rpc_argp = &arg,
aa9c2669
DQ		 4812 .rpc_resp = &res,
4813 };
4814 int status;
4815
12207f69 4816 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4817
12207f69 4818 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4819 if (status)
4820 dprintk("%s failed: %d\n", __func__, status);
4821
4822 return status;
4823}
4824
4825static int nfs4_do_set_security_label(struct inode *inode,
4826 struct nfs4_label *ilabel,
4827 struct nfs_fattr *fattr,
4828 struct nfs4_label *olabel)
4829{
4830 struct nfs4_exception exception = { };
4831 int err;
4832
4833 do {
c1578b76
TM		 4834 err = _nfs4_do_set_security_label(inode, ilabel,
4835 fattr, olabel);
4836 trace_nfs4_set_security_label(inode, err);
4837 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4838 &exception);
4839 } while (exception.retry);
4840 return err;
4841}
4842
4843static int
4844nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4845{
4846 struct nfs4_label ilabel, *olabel = NULL;
4847 struct nfs_fattr fattr;
4848 struct rpc_cred *cred;
2b0143b5 4849 struct inode *inode = d_inode(dentry);
aa9c2669
DQ		 4850 int status;
4851
4852 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4853 return -EOPNOTSUPP;
4854
4855 nfs_fattr_init(&fattr);
4856
4857 ilabel.pi = 0;
4858 ilabel.lfs = 0;
4859 ilabel.label = (char *)buf;
4860 ilabel.len = buflen;
4861
4862 cred = rpc_lookup_cred();
4863 if (IS_ERR(cred))
4864 return PTR_ERR(cred);
4865
4866 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4867 if (IS_ERR(olabel)) {
4868 status = -PTR_ERR(olabel);
4869 goto out;
4870 }
4871
4872 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4873 if (status == 0)
4874 nfs_setsecurity(inode, &fattr, olabel);
4875
4876 nfs4_label_free(olabel);
4877out:
4878 put_rpccred(cred);
4879 return status;
4880}
4881#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4882
4883
1da177e4 4884static int
8478eaa1
N		 4885nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4886 struct nfs4_state *state, long *timeout)
1da177e4 4887{
aa5190d0
TM		 4888 struct nfs_client *clp = server->nfs_client;
4889
4890 if (task->tk_status >= 0)
1da177e4
LT		 4891 return 0;
4892 switch(task->tk_status) {
a1d0b5ee 4893 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4894 case -NFS4ERR_ADMIN_REVOKED:
4895 case -NFS4ERR_BAD_STATEID:
4896 case -NFS4ERR_OPENMODE:
4897 if (state == NULL)
4898 break;
5d422301 4899 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4900 goto recovery_failed;
0400a6b0 4901 goto wait_on_recovery;
0ced63d1 4902 case -NFS4ERR_EXPIRED:
5d422301
TM		 4903 if (state != NULL) {
4904 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4905 goto recovery_failed;
5d422301 4906 }
1da177e4 4907 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4908 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4909 nfs4_schedule_lease_recovery(clp);
4910 goto wait_on_recovery;
519ae255
CL		 4911 case -NFS4ERR_MOVED:
4912 if (nfs4_schedule_migration_recovery(server) < 0)
4913 goto recovery_failed;
4914 goto wait_on_recovery;
8ef2f8d4
CL		 4915 case -NFS4ERR_LEASE_MOVED:
4916 nfs4_schedule_lease_moved_recovery(clp);
4917 goto wait_on_recovery;
4745e315
AA		 4918#if defined(CONFIG_NFS_V4_1)
4919 case -NFS4ERR_BADSESSION:
4920 case -NFS4ERR_BADSLOT:
4921 case -NFS4ERR_BAD_HIGH_SLOT:
4922 case -NFS4ERR_DEADSESSION:
4923 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4924 case -NFS4ERR_SEQ_FALSE_RETRY:
4925 case -NFS4ERR_SEQ_MISORDERED:
4926 dprintk("%s ERROR %d, Reset session\n", __func__,
4927 task->tk_status);
9f594791 4928 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 4929 goto wait_on_recovery;
4745e315 4930#endif /* CONFIG_NFS_V4_1 */
1da177e4 4931 case -NFS4ERR_DELAY:
aa5190d0 4932 nfs_inc_server_stats(server, NFSIOS_DELAY);
8478eaa1
N		 4933 rpc_delay(task, nfs4_update_delay(timeout));
4934 goto restart_call;
006ea73e 4935 case -NFS4ERR_GRACE:
1da177e4 4936 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4937 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4938 case -NFS4ERR_OLD_STATEID:
f1478c13 4939 goto restart_call;
1da177e4
LT		 4940 }
4941 task->tk_status = nfs4_map_errors(task->tk_status);
4942 return 0;
9f51a78e 4943recovery_failed:
5d422301
TM		 4944 task->tk_status = -EIO;
4945 return 0;
0400a6b0 4946wait_on_recovery:
a2c0b9e2 4947 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4948 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4949 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4950 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4951 goto recovery_failed;
f1478c13 4952restart_call:
a2c0b9e2
TM		 4953 task->tk_status = 0;
4954 return -EAGAIN;
1da177e4
LT		 4955}
4956
f092075d
CL		 4957static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4958 nfs4_verifier *bootverf)
cd93710e
CL		 4959{
4960 __be32 verf[2];
4961
2c820d9a
CL		 4962 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4963 /* An impossible timestamp guarantees this value
4964 * will never match a generated boot time. */
4965 verf[0] = 0;
17f26b12 4966 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4967 } else {
f092075d 4968 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4969 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4970 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4971 }
cd93710e
CL		 4972 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4973}
4974
a3192688
JL		 4975static int
4976nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 4977{
a3192688
JL		 4978 int result;
4979 size_t len;
4980 char *str;
4981 bool retried = false;
e984a55a 4982
ceb3a16c 4983 if (clp->cl_owner_id != NULL)
a3192688
JL		 4984 return 0;
4985retry:
4986 rcu_read_lock();
4987 len = 10 + strlen(clp->cl_ipaddr) + 1 +
4988 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
4989 1 +
4990 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
4991 1;
4992 rcu_read_unlock();
4993
4994 if (len > NFS4_OPAQUE_LIMIT + 1)
4995 return -EINVAL;
4996
4997 /*
4998 * Since this string is allocated at mount time, and held until the
4999 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5000 * about a memory-reclaim deadlock.
5001 */
5002 str = kmalloc(len, GFP_KERNEL);
5003 if (!str)
5004 return -ENOMEM;
ceb3a16c 5005
e984a55a 5006 rcu_read_lock();
a3192688
JL		 5007 result = scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
5008 clp->cl_ipaddr,
5009 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5010 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5011 rcu_read_unlock();
a3192688
JL		 5012
5013 /* Did something change? */
5014 if (result >= len) {
5015 kfree(str);
5016 if (retried)
5017 return -EINVAL;
5018 retried = true;
5019 goto retry;
5020 }
5021 clp->cl_owner_id = str;
5022 return 0;
e984a55a
CL		 5023}
5024
873e3851
JL		 5025static int
5026nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5027{
5028 int result;
5029 size_t len;
5030 char *str;
5031
5032 len = 10 + 10 + 1 + 10 + 1 +
5033 strlen(nfs4_client_id_uniquifier) + 1 +
5034 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5035
5036 if (len > NFS4_OPAQUE_LIMIT + 1)
5037 return -EINVAL;
5038
5039 /*
5040 * Since this string is allocated at mount time, and held until the
5041 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5042 * about a memory-reclaim deadlock.
5043 */
5044 str = kmalloc(len, GFP_KERNEL);
5045 if (!str)
5046 return -ENOMEM;
5047
5048 result = scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
5049 clp->rpc_ops->version, clp->cl_minorversion,
5050 nfs4_client_id_uniquifier,
5051 clp->cl_rpcclient->cl_nodename);
5052 if (result >= len) {
5053 kfree(str);
5054 return -EINVAL;
5055 }
5056 clp->cl_owner_id = str;
5057 return 0;
5058}
5059
5060static int
5061nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5062{
873e3851
JL		 5063 int result;
5064 size_t len;
5065 char *str;
ceb3a16c
TM		 5066
5067 if (clp->cl_owner_id != NULL)
873e3851 5068 return 0;
6f2ea7f2
CL		 5069
5070 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5071 return nfs4_init_uniquifier_client_string(clp);
5072
5073 len = 10 + 10 + 1 + 10 + 1 +
5074 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5075
5076 if (len > NFS4_OPAQUE_LIMIT + 1)
5077 return -EINVAL;
5078
5079 /*
5080 * Since this string is allocated at mount time, and held until the
5081 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5082 * about a memory-reclaim deadlock.
5083 */
5084 str = kmalloc(len, GFP_KERNEL);
5085 if (!str)
5086 return -ENOMEM;
5087
5088 result = scnprintf(str, len, "Linux NFSv%u.%u %s",
5089 clp->rpc_ops->version, clp->cl_minorversion,
5090 clp->cl_rpcclient->cl_nodename);
5091 if (result >= len) {
5092 kfree(str);
5093 return -EINVAL;
5094 }
5095 clp->cl_owner_id = str;
5096 return 0;
e984a55a
CL		 5097}
5098
706cb8db
CL		 5099/*
5100 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5101 * services. Advertise one based on the address family of the
5102 * clientaddr.
5103 */
5104static unsigned int
5105nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5106{
5107 if (strchr(clp->cl_ipaddr, ':') != NULL)
5108 return scnprintf(buf, len, "tcp6");
5109 else
5110 return scnprintf(buf, len, "tcp");
5111}
5112
f11b2a1c
JL		 5113static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5114{
5115 struct nfs4_setclientid *sc = calldata;
5116
5117 if (task->tk_status == 0)
5118 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5119}
5120
5121static const struct rpc_call_ops nfs4_setclientid_ops = {
5122 .rpc_call_done = nfs4_setclientid_done,
5123};
5124
6bbb4ae8
CL		 5125/**
5126 * nfs4_proc_setclientid - Negotiate client ID
5127 * @clp: state data structure
5128 * @program: RPC program for NFSv4 callback service
5129 * @port: IP port number for NFS4 callback service
5130 * @cred: RPC credential to use for this call
5131 * @res: where to place the result
5132 *
5133 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5134 */
bb8b27e5
TM		 5135int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5136 unsigned short port, struct rpc_cred *cred,
5137 struct nfs4_setclientid_res *res)
1da177e4
LT		 5138{
5139 nfs4_verifier sc_verifier;
5140 struct nfs4_setclientid setclientid = {
5141 .sc_verifier = &sc_verifier,
5142 .sc_prog = program,
3a6bb738 5143 .sc_clnt = clp,
1da177e4
LT		 5144 };
5145 struct rpc_message msg = {
5146 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5147 .rpc_argp = &setclientid,
bb8b27e5 5148 .rpc_resp = res,
286d7d6a 5149 .rpc_cred = cred,
1da177e4 5150 };
f11b2a1c
JL		 5151 struct rpc_task *task;
5152 struct rpc_task_setup task_setup_data = {
5153 .rpc_client = clp->cl_rpcclient,
5154 .rpc_message = &msg,
5155 .callback_ops = &nfs4_setclientid_ops,
5156 .callback_data = &setclientid,
5157 .flags = RPC_TASK_TIMEOUT,
5158 };
6bbb4ae8 5159 int status;
1da177e4 5160
de734831 5161 /* nfs_client_id4 */
f092075d 5162 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5163
5164 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5165 status = nfs4_init_uniform_client_string(clp);
5166 else
a3192688 5167 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5168
5169 if (status)
5170 goto out;
3a6bb738 5171
de734831 5172 /* cb_client4 */
706cb8db
CL		 5173 setclientid.sc_netid_len =
5174 nfs4_init_callback_netid(clp,
5175 setclientid.sc_netid,
5176 sizeof(setclientid.sc_netid));
de734831 5177 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5178 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5179 clp->cl_ipaddr, port >> 8, port & 255);
5180
3a6bb738 5181 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5182 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5183 clp->cl_owner_id);
f11b2a1c
JL		 5184 task = rpc_run_task(&task_setup_data);
5185 if (IS_ERR(task)) {
5186 status = PTR_ERR(task);
5187 goto out;
5188 }
5189 status = task->tk_status;
5190 if (setclientid.sc_cred) {
5191 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5192 put_rpccred(setclientid.sc_cred);
5193 }
5194 rpc_put_task(task);
5195out:
c6d01c6f 5196 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5197 dprintk("NFS reply setclientid: %d\n", status);
5198 return status;
1da177e4
LT		 5199}
5200
6bbb4ae8
CL		 5201/**
5202 * nfs4_proc_setclientid_confirm - Confirm client ID
5203 * @clp: state data structure
5204 * @res: result of a previous SETCLIENTID
5205 * @cred: RPC credential to use for this call
5206 *
5207 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5208 */
fd954ae1 5209int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5210 struct nfs4_setclientid_res *arg,
5211 struct rpc_cred *cred)
1da177e4 5212{
1da177e4
LT		 5213 struct rpc_message msg = {
5214 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5215 .rpc_argp = arg,
286d7d6a 5216 .rpc_cred = cred,
1da177e4 5217 };
1da177e4
LT		 5218 int status;
5219
6bbb4ae8
CL		 5220 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5221 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5222 clp->cl_clientid);
1bd714f2 5223 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5224 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5225 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5226 return status;
5227}
5228
fe650407
TM		 5229struct nfs4_delegreturndata {
5230 struct nfs4_delegreturnargs args;
fa178f29 5231 struct nfs4_delegreturnres res;
fe650407
TM		 5232 struct nfs_fh fh;
5233 nfs4_stateid stateid;
26e976a8 5234 unsigned long timestamp;
fa178f29 5235 struct nfs_fattr fattr;
fe650407 5236 int rpc_status;
039b756a
PT		 5237 struct inode *inode;
5238 bool roc;
5239 u32 roc_barrier;
fe650407
TM		 5240};
5241
fe650407
TM		 5242static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5243{
5244 struct nfs4_delegreturndata *data = calldata;
938e1010 5245
14516c3a
TM		 5246 if (!nfs4_sequence_done(task, &data->res.seq_res))
5247 return;
938e1010 5248
ca8acf8d 5249 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5250 switch (task->tk_status) {
79708861 5251 case 0:
fa178f29 5252 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5253 case -NFS4ERR_ADMIN_REVOKED:
5254 case -NFS4ERR_DELEG_REVOKED:
5255 case -NFS4ERR_BAD_STATEID:
5256 case -NFS4ERR_OLD_STATEID:
5257 case -NFS4ERR_STALE_STATEID:
5258 case -NFS4ERR_EXPIRED:
5259 task->tk_status = 0;
039b756a
PT		 5260 if (data->roc)
5261 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5262 break;
79708861 5263 default:
8478eaa1
N		 5264 if (nfs4_async_handle_error(task, data->res.server,
5265 NULL, NULL) == -EAGAIN) {
d00c5d43 5266 rpc_restart_call_prepare(task);
79708861
RL		 5267 return;
5268 }
5269 }
5270 data->rpc_status = task->tk_status;
fe650407
TM		 5271}
5272
5273static void nfs4_delegreturn_release(void *calldata)
5274{
039b756a 5275 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5276 struct inode *inode = data->inode;
039b756a 5277
ea7c38fe
TM		 5278 if (inode) {
5279 if (data->roc)
5280 pnfs_roc_release(inode);
5281 nfs_iput_and_deactive(inode);
5282 }
fe650407
TM		 5283 kfree(calldata);
5284}
5285
938e1010
AA		 5286static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5287{
5288 struct nfs4_delegreturndata *d_data;
5289
5290 d_data = (struct nfs4_delegreturndata *)data;
5291
039b756a
PT		 5292 if (d_data->roc &&
5293 pnfs_roc_drain(d_data->inode, &d_data->roc_barrier, task))
5294 return;
5295
d9afbd1b
TM		 5296 nfs4_setup_sequence(d_data->res.server,
5297 &d_data->args.seq_args,
5298 &d_data->res.seq_res,
5299 task);
938e1010 5300}
938e1010 5301
c8d149f3 5302static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5303 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5304 .rpc_call_done = nfs4_delegreturn_done,
5305 .rpc_release = nfs4_delegreturn_release,
5306};
5307
e6f81075 5308static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5309{
5310 struct nfs4_delegreturndata *data;
fa178f29 5311 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5312 struct rpc_task *task;
5138fde0
TM		 5313 struct rpc_message msg = {
5314 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5315 .rpc_cred = cred,
5316 };
c970aa85
TM		 5317 struct rpc_task_setup task_setup_data = {
5318 .rpc_client = server->client,
5138fde0 5319 .rpc_message = &msg,
c970aa85
TM		 5320 .callback_ops = &nfs4_delegreturn_ops,
5321 .flags = RPC_TASK_ASYNC,
5322 };
e6f81075 5323 int status = 0;
fe650407 5324
8535b2be 5325 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5326 if (data == NULL)
5327 return -ENOMEM;
a9c92d6b 5328 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5329 data->args.fhandle = &data->fh;
5330 data->args.stateid = &data->stateid;
9e907fec 5331 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5332 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5333 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5334 data->res.fattr = &data->fattr;
5335 data->res.server = server;
5138fde0 5336 nfs_fattr_init(data->res.fattr);
26e976a8 5337 data->timestamp = jiffies;
fe650407 5338 data->rpc_status = 0;
ea7c38fe
TM		 5339 data->inode = nfs_igrab_and_active(inode);
5340 if (data->inode)
5341 data->roc = nfs4_roc(inode);
fe650407 5342
c970aa85 5343 task_setup_data.callback_data = data;
1174dd1f
TM		 5344 msg.rpc_argp = &data->args;
5345 msg.rpc_resp = &data->res;
c970aa85 5346 task = rpc_run_task(&task_setup_data);
7a1218a2 5347 if (IS_ERR(task))
fe650407 5348 return PTR_ERR(task);
e6f81075
TM		 5349 if (!issync)
5350 goto out;
fe650407 5351 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5352 if (status != 0)
5353 goto out;
5354 status = data->rpc_status;
e144cbcc
TM		 5355 if (status == 0)
5356 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5357 else
5358 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5359out:
e6b3c4db 5360 rpc_put_task(task);
fe650407 5361 return status;
1da177e4
LT		 5362}
5363
e6f81075 5364int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5365{
5366 struct nfs_server *server = NFS_SERVER(inode);
5367 struct nfs4_exception exception = { };
5368 int err;
5369 do {
e6f81075 5370 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5371 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5372 switch (err) {
5373 case -NFS4ERR_STALE_STATEID:
5374 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5375 case 0:
5376 return 0;
5377 }
5378 err = nfs4_handle_exception(server, err, &exception);
5379 } while (exception.retry);
5380 return err;
5381}
5382
5383#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5384#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5385
5386/*
5387 * sleep, with exponential backoff, and retry the LOCK operation.
5388 */
5389static unsigned long
5390nfs4_set_lock_task_retry(unsigned long timeout)
5391{
416ad3c9 5392 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5393 timeout <<= 1;
5394 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5395 return NFS4_LOCK_MAXTIMEOUT;
5396 return timeout;
5397}
5398
1da177e4
LT		 5399static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5400{
5401 struct inode *inode = state->inode;
5402 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5403 struct nfs_client *clp = server->nfs_client;
911d1aaf 5404 struct nfs_lockt_args arg = {
1da177e4 5405 .fh = NFS_FH(inode),
911d1aaf 5406 .fl = request,
1da177e4 5407 };
911d1aaf
TM		 5408 struct nfs_lockt_res res = {
5409 .denied = request,
1da177e4
LT		 5410 };
5411 struct rpc_message msg = {
5412 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5413 .rpc_argp = &arg,
5414 .rpc_resp = &res,
5415 .rpc_cred = state->owner->so_cred,
5416 };
1da177e4
LT		 5417 struct nfs4_lock_state *lsp;
5418 int status;
5419
911d1aaf 5420 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5421 status = nfs4_set_lock_state(state, request);
5422 if (status != 0)
5423 goto out;
5424 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5425 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5426 arg.lock_owner.s_dev = server->s_dev;
7c513058 5427 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5428 switch (status) {
5429 case 0:
5430 request->fl_type = F_UNLCK;
5431 break;
5432 case -NFS4ERR_DENIED:
5433 status = 0;
1da177e4 5434 }
70cc6487 5435 request->fl_ops->fl_release_private(request);
a6f951dd 5436 request->fl_ops = NULL;
8d0a8a9d 5437out:
1da177e4
LT		 5438 return status;
5439}
5440
5441static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5442{
5443 struct nfs4_exception exception = { };
5444 int err;
5445
5446 do {
d1b748a5
TM		 5447 err = _nfs4_proc_getlk(state, cmd, request);
5448 trace_nfs4_get_lock(request, state, cmd, err);
5449 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5450 &exception);
5451 } while (exception.retry);
5452 return err;
5453}
5454
83bfff23 5455static int do_vfs_lock(struct inode *inode, struct file_lock *fl)
1da177e4
LT		 5456{
5457 int res = 0;
5458 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5459 case FL_POSIX:
83bfff23 5460 res = posix_lock_inode_wait(inode, fl);
1da177e4
LT		 5461 break;
5462 case FL_FLOCK:
83bfff23 5463 res = flock_lock_inode_wait(inode, fl);
1da177e4
LT		 5464 break;
5465 default:
5466 BUG();
5467 }
1da177e4
LT		 5468 return res;
5469}
5470
faf5f49c 5471struct nfs4_unlockdata {
911d1aaf
TM		 5472 struct nfs_locku_args arg;
5473 struct nfs_locku_res res;
faf5f49c
TM		 5474 struct nfs4_lock_state *lsp;
5475 struct nfs_open_context *ctx;
911d1aaf
TM		 5476 struct file_lock fl;
5477 const struct nfs_server *server;
26e976a8 5478 unsigned long timestamp;
faf5f49c
TM		 5479};
5480
911d1aaf
TM		 5481static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5482 struct nfs_open_context *ctx,
5483 struct nfs4_lock_state *lsp,
5484 struct nfs_seqid *seqid)
5485{
5486 struct nfs4_unlockdata *p;
5487 struct inode *inode = lsp->ls_state->inode;
5488
8535b2be 5489 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5490 if (p == NULL)
5491 return NULL;
5492 p->arg.fh = NFS_FH(inode);
5493 p->arg.fl = &p->fl;
5494 p->arg.seqid = seqid;
c1d51931 5495 p->res.seqid = seqid;
911d1aaf
TM		 5496 p->lsp = lsp;
5497 atomic_inc(&lsp->ls_count);
5498 /* Ensure we don't close file until we're done freeing locks! */
5499 p->ctx = get_nfs_open_context(ctx);
5500 memcpy(&p->fl, fl, sizeof(p->fl));
5501 p->server = NFS_SERVER(inode);
5502 return p;
5503}
5504
06f814a3 5505static void nfs4_locku_release_calldata(void *data)
faf5f49c 5506{
963d8fe5 5507 struct nfs4_unlockdata *calldata = data;
911d1aaf 5508 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5509 nfs4_put_lock_state(calldata->lsp);
5510 put_nfs_open_context(calldata->ctx);
5511 kfree(calldata);
faf5f49c
TM		 5512}
5513
963d8fe5 5514static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5515{
963d8fe5 5516 struct nfs4_unlockdata *calldata = data;
faf5f49c 5517
14516c3a
TM		 5518 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5519 return;
faf5f49c
TM		 5520 switch (task->tk_status) {
5521 case 0:
26e976a8 5522 renew_lease(calldata->server, calldata->timestamp);
83bfff23 5523 do_vfs_lock(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 5524 if (nfs4_update_lock_stateid(calldata->lsp,
5525 &calldata->res.stateid))
5526 break;
9e33bed5
TM		 5527 case -NFS4ERR_BAD_STATEID:
5528 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5529 case -NFS4ERR_STALE_STATEID:
5530 case -NFS4ERR_EXPIRED:
425c1d4e
TM		 5531 if (!nfs4_stateid_match(&calldata->arg.stateid,
5532 &calldata->lsp->ls_stateid))
5533 rpc_restart_call_prepare(task);
faf5f49c
TM		 5534 break;
5535 default:
8478eaa1
N		 5536 if (nfs4_async_handle_error(task, calldata->server,
5537 NULL, NULL) == -EAGAIN)
d00c5d43 5538 rpc_restart_call_prepare(task);
faf5f49c 5539 }
2b1bc308 5540 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5541}
5542
4ce70ada 5543static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5544{
4ce70ada 5545 struct nfs4_unlockdata *calldata = data;
faf5f49c 5546
911d1aaf 5547 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5548 goto out_wait;
425c1d4e 5549 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5550 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5551 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5552 goto out_no_action;
faf5f49c 5553 }
26e976a8 5554 calldata->timestamp = jiffies;
035168ab 5555 if (nfs4_setup_sequence(calldata->server,
a893693c 5556 &calldata->arg.seq_args,
2240a9e2
TM		 5557 &calldata->res.seq_res,
5558 task) != 0)
5559 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5560 return;
5561out_no_action:
5562 task->tk_action = NULL;
5563out_wait:
5564 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5565}
5566
963d8fe5 5567static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5568 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5569 .rpc_call_done = nfs4_locku_done,
06f814a3 5570 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5571};
5572
a5d16a4d
TM		 5573static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5574 struct nfs_open_context *ctx,
5575 struct nfs4_lock_state *lsp,
5576 struct nfs_seqid *seqid)
5577{
5578 struct nfs4_unlockdata *data;
5138fde0
TM		 5579 struct rpc_message msg = {
5580 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5581 .rpc_cred = ctx->cred,
5582 };
c970aa85
TM		 5583 struct rpc_task_setup task_setup_data = {
5584 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5585 .rpc_message = &msg,
c970aa85 5586 .callback_ops = &nfs4_locku_ops,
101070ca 5587 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5588 .flags = RPC_TASK_ASYNC,
5589 };
a5d16a4d 5590
fa940720
WAA		 5591 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5592 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5593
137d6aca
FF		 5594 /* Ensure this is an unlock - when canceling a lock, the
5595 * canceled lock is passed in, and it won't be an unlock.
5596 */
5597 fl->fl_type = F_UNLCK;
5598
a5d16a4d
TM		 5599 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5600 if (data == NULL) {
5601 nfs_free_seqid(seqid);
5602 return ERR_PTR(-ENOMEM);
5603 }
5604
a9c92d6b 5605 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5606 msg.rpc_argp = &data->arg;
5607 msg.rpc_resp = &data->res;
c970aa85
TM		 5608 task_setup_data.callback_data = data;
5609 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5610}
5611
faf5f49c
TM		 5612static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5613{
65b62a29
TM		 5614 struct inode *inode = state->inode;
5615 struct nfs4_state_owner *sp = state->owner;
5616 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5617 struct nfs_seqid *seqid;
1da177e4 5618 struct nfs4_lock_state *lsp;
06f814a3 5619 struct rpc_task *task;
b4019c0e 5620 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 5621 int status = 0;
536ff0f8 5622 unsigned char fl_flags = request->fl_flags;
faf5f49c 5623
8d0a8a9d 5624 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5625 /* Unlock _before_ we do the RPC call */
5626 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5627 /* Exclude nfs_delegation_claim_locks() */
5628 mutex_lock(&sp->so_delegreturn_mutex);
5629 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 5630 down_read(&nfsi->rwsem);
83bfff23 5631 if (do_vfs_lock(inode, request) == -ENOENT) {
19e03c57 5632 up_read(&nfsi->rwsem);
65b62a29 5633 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5634 goto out;
19e03c57
TM		 5635 }
5636 up_read(&nfsi->rwsem);
65b62a29 5637 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5638 if (status != 0)
9b073574
TM		 5639 goto out;
5640 /* Is this a delegated lock? */
8d0a8a9d 5641 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5642 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5643 goto out;
b4019c0e
TM		 5644 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5645 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5646 status = -ENOMEM;
badc76dd 5647 if (IS_ERR(seqid))
9b073574 5648 goto out;
cd3758e3 5649 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5650 status = PTR_ERR(task);
5651 if (IS_ERR(task))
9b073574 5652 goto out;
a5d16a4d 5653 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5654 rpc_put_task(task);
9b073574 5655out:
536ff0f8 5656 request->fl_flags = fl_flags;
d1b748a5 5657 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5658 return status;
5659}
5660
a5d16a4d
TM		 5661struct nfs4_lockdata {
5662 struct nfs_lock_args arg;
5663 struct nfs_lock_res res;
5664 struct nfs4_lock_state *lsp;
5665 struct nfs_open_context *ctx;
5666 struct file_lock fl;
26e976a8 5667 unsigned long timestamp;
a5d16a4d
TM		 5668 int rpc_status;
5669 int cancelled;
66179efe 5670 struct nfs_server *server;
a5d16a4d
TM		 5671};
5672
5673static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5674 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5675 gfp_t gfp_mask)
1da177e4 5676{
a5d16a4d
TM		 5677 struct nfs4_lockdata *p;
5678 struct inode *inode = lsp->ls_state->inode;
1da177e4 5679 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 5680 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 5681
8535b2be 5682 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5683 if (p == NULL)
5684 return NULL;
5685
5686 p->arg.fh = NFS_FH(inode);
5687 p->arg.fl = &p->fl;
8535b2be 5688 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 5689 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 5690 goto out_free;
b4019c0e
TM		 5691 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5692 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 5693 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 5694 goto out_free_seqid;
7539bbab 5695 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5696 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5697 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5698 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5699 p->lsp = lsp;
66179efe 5700 p->server = server;
a5d16a4d
TM		 5701 atomic_inc(&lsp->ls_count);
5702 p->ctx = get_nfs_open_context(ctx);
feaff8e5 5703 get_file(fl->fl_file);
a5d16a4d
TM		 5704 memcpy(&p->fl, fl, sizeof(p->fl));
5705 return p;
2f74c0a0
TM		 5706out_free_seqid:
5707 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5708out_free:
5709 kfree(p);
5710 return NULL;
5711}
5712
5713static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5714{
5715 struct nfs4_lockdata *data = calldata;
5716 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5717
3110ff80 5718 dprintk("%s: begin!\n", __func__);
2f74c0a0 5719 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5720 goto out_wait;
a5d16a4d 5721 /* Do we need to do an open_to_lock_owner? */
6b447539 5722 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 5723 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5724 goto out_release_lock_seqid;
8fe72bac 5725 }
425c1d4e
TM		 5726 nfs4_stateid_copy(&data->arg.open_stateid,
5727 &state->open_stateid);
a5d16a4d 5728 data->arg.new_lock_owner = 1;
c1d51931 5729 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 5730 } else {
2f74c0a0 5731 data->arg.new_lock_owner = 0;
425c1d4e
TM		 5732 nfs4_stateid_copy(&data->arg.lock_stateid,
5733 &data->lsp->ls_stateid);
5734 }
5d422301
TM		 5735 if (!nfs4_valid_open_stateid(state)) {
5736 data->rpc_status = -EBADF;
5737 task->tk_action = NULL;
5738 goto out_release_open_seqid;
5739 }
26e976a8 5740 data->timestamp = jiffies;
035168ab
TM		 5741 if (nfs4_setup_sequence(data->server,
5742 &data->arg.seq_args,
2240a9e2 5743 &data->res.seq_res,
d9afbd1b 5744 task) == 0)
66179efe 5745 return;
5d422301 5746out_release_open_seqid:
2240a9e2
TM		 5747 nfs_release_seqid(data->arg.open_seqid);
5748out_release_lock_seqid:
5749 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5750out_wait:
5751 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5752 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5753}
5754
a5d16a4d
TM		 5755static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5756{
5757 struct nfs4_lockdata *data = calldata;
39071e6f 5758 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 5759
3110ff80 5760 dprintk("%s: begin!\n", __func__);
a5d16a4d 5761
14516c3a
TM		 5762 if (!nfs4_sequence_done(task, &data->res.seq_res))
5763 return;
66179efe 5764
a5d16a4d 5765 data->rpc_status = task->tk_status;
425c1d4e
TM		 5766 switch (task->tk_status) {
5767 case 0:
2b0143b5 5768 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 5769 data->timestamp);
c69899a1
TM		 5770 if (data->arg.new_lock) {
5771 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
83bfff23 5772 if (do_vfs_lock(lsp->ls_state->inode, &data->fl) < 0) {
c69899a1
TM		 5773 rpc_restart_call_prepare(task);
5774 break;
5775 }
5776 }
39071e6f
TM		 5777 if (data->arg.new_lock_owner != 0) {
5778 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5779 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5780 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5781 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5782 rpc_restart_call_prepare(task);
425c1d4e
TM		 5783 break;
5784 case -NFS4ERR_BAD_STATEID:
5785 case -NFS4ERR_OLD_STATEID:
5786 case -NFS4ERR_STALE_STATEID:
5787 case -NFS4ERR_EXPIRED:
5788 if (data->arg.new_lock_owner != 0) {
5789 if (!nfs4_stateid_match(&data->arg.open_stateid,
5790 &lsp->ls_state->open_stateid))
5791 rpc_restart_call_prepare(task);
5792 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5793 &lsp->ls_stateid))
5794 rpc_restart_call_prepare(task);
a5d16a4d 5795 }
3110ff80 5796 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5797}
5798
5799static void nfs4_lock_release(void *calldata)
5800{
5801 struct nfs4_lockdata *data = calldata;
5802
3110ff80 5803 dprintk("%s: begin!\n", __func__);
2f74c0a0 5804 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5805 if (data->cancelled != 0) {
5806 struct rpc_task *task;
5807 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5808 data->arg.lock_seqid);
5809 if (!IS_ERR(task))
bf294b41 5810 rpc_put_task_async(task);
3110ff80 5811 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5812 } else
5813 nfs_free_seqid(data->arg.lock_seqid);
5814 nfs4_put_lock_state(data->lsp);
5815 put_nfs_open_context(data->ctx);
feaff8e5 5816 fput(data->fl.fl_file);
a5d16a4d 5817 kfree(data);
3110ff80 5818 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5819}
5820
5821static const struct rpc_call_ops nfs4_lock_ops = {
5822 .rpc_call_prepare = nfs4_lock_prepare,
5823 .rpc_call_done = nfs4_lock_done,
5824 .rpc_release = nfs4_lock_release,
5825};
5826
2bee72a6
TM		 5827static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5828{
2bee72a6
TM		 5829 switch (error) {
5830 case -NFS4ERR_ADMIN_REVOKED:
5831 case -NFS4ERR_BAD_STATEID:
ecac799a 5832 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5833 if (new_lock_owner != 0 ||
795a88c9 5834 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5835 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5836 break;
5837 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5838 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5839 case -NFS4ERR_EXPIRED:
5840 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5841 };
5842}
5843
afe6c27c 5844static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5845{
5846 struct nfs4_lockdata *data;
5847 struct rpc_task *task;
5138fde0
TM		 5848 struct rpc_message msg = {
5849 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5850 .rpc_cred = state->owner->so_cred,
5851 };
c970aa85
TM		 5852 struct rpc_task_setup task_setup_data = {
5853 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5854 .rpc_message = &msg,
c970aa85 5855 .callback_ops = &nfs4_lock_ops,
101070ca 5856 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5857 .flags = RPC_TASK_ASYNC,
5858 };
a5d16a4d
TM		 5859 int ret;
5860
3110ff80 5861 dprintk("%s: begin!\n", __func__);
cd3758e3 5862 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5863 fl->fl_u.nfs4_fl.owner,
5864 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5865 if (data == NULL)
5866 return -ENOMEM;
5867 if (IS_SETLKW(cmd))
5868 data->arg.block = 1;
a9c92d6b 5869 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5870 msg.rpc_argp = &data->arg;
5871 msg.rpc_resp = &data->res;
c970aa85 5872 task_setup_data.callback_data = data;
8fe72bac
TM		 5873 if (recovery_type > NFS_LOCK_NEW) {
5874 if (recovery_type == NFS_LOCK_RECLAIM)
5875 data->arg.reclaim = NFS_LOCK_RECLAIM;
5876 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 5877 } else
5878 data->arg.new_lock = 1;
c970aa85 5879 task = rpc_run_task(&task_setup_data);
7a1218a2 5880 if (IS_ERR(task))
a5d16a4d 5881 return PTR_ERR(task);
a5d16a4d
TM		 5882 ret = nfs4_wait_for_completion_rpc_task(task);
5883 if (ret == 0) {
5884 ret = data->rpc_status;
2bee72a6
TM		 5885 if (ret)
5886 nfs4_handle_setlk_error(data->server, data->lsp,
5887 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5888 } else
5889 data->cancelled = 1;
e6b3c4db 5890 rpc_put_task(task);
3110ff80 5891 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5892 return ret;
1da177e4
LT		 5893}
5894
5895static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5896{
202b50dc 5897 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5898 struct nfs4_exception exception = {
5899 .inode = state->inode,
5900 };
202b50dc
TM		 5901 int err;
5902
5903 do {
42a2d13e
TM		 5904 /* Cache the lock if possible... */
5905 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5906 return 0;
afe6c27c 5907 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5908 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5909 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5910 break;
5911 nfs4_handle_exception(server, err, &exception);
5912 } while (exception.retry);
5913 return err;
1da177e4
LT		 5914}
5915
5916static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5917{
202b50dc 5918 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5919 struct nfs4_exception exception = {
5920 .inode = state->inode,
5921 };
202b50dc
TM		 5922 int err;
5923
6bfc93ef
TM		 5924 err = nfs4_set_lock_state(state, request);
5925 if (err != 0)
5926 return err;
f6de7a39 5927 if (!recover_lost_locks) {
ef1820f9
N		 5928 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5929 return 0;
5930 }
202b50dc 5931 do {
42a2d13e
TM		 5932 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5933 return 0;
afe6c27c 5934 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5935 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5936 switch (err) {
5937 default:
5938 goto out;
5939 case -NFS4ERR_GRACE:
5940 case -NFS4ERR_DELAY:
5941 nfs4_handle_exception(server, err, &exception);
5942 err = 0;
5943 }
202b50dc 5944 } while (exception.retry);
a9ed2e25 5945out:
202b50dc 5946 return err;
1da177e4
LT		 5947}
5948
f062eb6c 5949#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5950/**
5951 * nfs41_check_expired_locks - possibly free a lock stateid
5952 *
5953 * @state: NFSv4 state for an inode
5954 *
5955 * Returns NFS_OK if recovery for this stateid is now finished.
5956 * Otherwise a negative NFS4ERR value is returned.
5957 */
b01dd1d8 5958static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5959{
eb64cf96 5960 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5961 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5962 struct nfs_server *server = NFS_SERVER(state->inode);
5963
b01dd1d8 5964 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5965 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5966 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5967
5968 status = nfs41_test_stateid(server,
5969 &lsp->ls_stateid,
5970 cred);
08cb47fa 5971 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5972 if (status != NFS_OK) {
3e60ffdd
CL		 5973 /* Free the stateid unless the server
5974 * informs us the stateid is unrecognized. */
89af2739
CL		 5975 if (status != -NFS4ERR_BAD_STATEID)
5976 nfs41_free_stateid(server,
ab7cb0df
TM		 5977 &lsp->ls_stateid,
5978 cred);
795a88c9 5979 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5980 ret = status;
5981 }
5982 }
5983 };
5984
5985 return ret;
5986}
5987
5988static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5989{
5990 int status = NFS_OK;
5991
5992 if (test_bit(LK_STATE_IN_USE, &state->flags))
5993 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5994 if (status != NFS_OK)
5995 status = nfs4_lock_expired(state, request);
5996 return status;
f062eb6c
BS		 5997}
5998#endif
5999
1da177e4
LT		 6000static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6001{
19e03c57 6002 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 6003 unsigned char fl_flags = request->fl_flags;
8e469ebd 6004 int status = -ENOLCK;
1da177e4 6005
8e469ebd
TM		 6006 if ((fl_flags & FL_POSIX) &&
6007 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6008 goto out;
6bfc93ef 6009 /* Is this a delegated open? */
6bfc93ef
TM		 6010 status = nfs4_set_lock_state(state, request);
6011 if (status != 0)
6012 goto out;
01c3b861 6013 request->fl_flags |= FL_ACCESS;
83bfff23 6014 status = do_vfs_lock(state->inode, request);
01c3b861
TM		 6015 if (status < 0)
6016 goto out;
19e03c57 6017 down_read(&nfsi->rwsem);
01c3b861 6018 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6019 /* Yes: cache locks! */
01c3b861 6020 /* ...but avoid races with delegation recall... */
19e03c57 6021 request->fl_flags = fl_flags & ~FL_SLEEP;
83bfff23 6022 status = do_vfs_lock(state->inode, request);
c69899a1 6023 up_read(&nfsi->rwsem);
9a99af49 6024 goto out;
9a99af49 6025 }
19e03c57 6026 up_read(&nfsi->rwsem);
c69899a1 6027 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6028out:
6029 request->fl_flags = fl_flags;
1da177e4
LT		 6030 return status;
6031}
6032
6033static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6034{
a1d0b5ee
TM		 6035 struct nfs4_exception exception = {
6036 .state = state,
05ffe24f 6037 .inode = state->inode,
a1d0b5ee 6038 };
1da177e4
LT		 6039 int err;
6040
6041 do {
965b5d67 6042 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 6043 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 6044 if (err == -NFS4ERR_DENIED)
6045 err = -EAGAIN;
1da177e4 6046 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6047 err, &exception);
1da177e4
LT		 6048 } while (exception.retry);
6049 return err;
6050}
6051
6052static int
6053nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6054{
6055 struct nfs_open_context *ctx;
6056 struct nfs4_state *state;
6057 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6058 int status;
6059
6060 /* verify open state */
cd3758e3 6061 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6062 state = ctx->state;
6063
6064 if (request->fl_start < 0 || request->fl_end < 0)
6065 return -EINVAL;
6066
d953126a
TM		 6067 if (IS_GETLK(cmd)) {
6068 if (state != NULL)
6069 return nfs4_proc_getlk(state, F_GETLK, request);
6070 return 0;
6071 }
1da177e4
LT		 6072
6073 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6074 return -EINVAL;
6075
d953126a
TM		 6076 if (request->fl_type == F_UNLCK) {
6077 if (state != NULL)
6078 return nfs4_proc_unlck(state, cmd, request);
6079 return 0;
6080 }
1da177e4 6081
d953126a
TM		 6082 if (state == NULL)
6083 return -ENOLCK;
55725513
TM		 6084 /*
6085 * Don't rely on the VFS having checked the file open mode,
6086 * since it won't do this for flock() locks.
6087 */
f44106e2 6088 switch (request->fl_type) {
55725513
TM		 6089 case F_RDLCK:
6090 if (!(filp->f_mode & FMODE_READ))
6091 return -EBADF;
6092 break;
6093 case F_WRLCK:
6094 if (!(filp->f_mode & FMODE_WRITE))
6095 return -EBADF;
6096 }
6097
1da177e4
LT		 6098 do {
6099 status = nfs4_proc_setlk(state, cmd, request);
6100 if ((status != -EAGAIN) || IS_SETLK(cmd))
6101 break;
6102 timeout = nfs4_set_lock_task_retry(timeout);
6103 status = -ERESTARTSYS;
6104 if (signalled())
6105 break;
6106 } while(status < 0);
1da177e4
LT		 6107 return status;
6108}
6109
db4f2e63 6110int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6111{
6112 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6113 int err;
6114
6115 err = nfs4_set_lock_state(state, fl);
6116 if (err != 0)
db4f2e63 6117 return err;
4a706fa0 6118 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6119 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6120}
6b3b5496 6121
cf470c3e
TM		 6122struct nfs_release_lockowner_data {
6123 struct nfs4_lock_state *lsp;
5ae67c4f 6124 struct nfs_server *server;
cf470c3e 6125 struct nfs_release_lockowner_args args;
b7e63a10 6126 struct nfs_release_lockowner_res res;
60ea6812 6127 unsigned long timestamp;
cf470c3e
TM		 6128};
6129
fbd4bfd1
CL		 6130static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6131{
6132 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6133 struct nfs_server *server = data->server;
cb04ad2a
PT		 6134 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6135 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6136 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6137 data->timestamp = jiffies;
fbd4bfd1
CL		 6138}
6139
6140static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6141{
6142 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6143 struct nfs_server *server = data->server;
6144
b7e63a10 6145 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6146
6147 switch (task->tk_status) {
6148 case 0:
6149 renew_lease(server, data->timestamp);
6150 break;
6151 case -NFS4ERR_STALE_CLIENTID:
6152 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6153 nfs4_schedule_lease_recovery(server->nfs_client);
6154 break;
60ea6812
CL		 6155 case -NFS4ERR_LEASE_MOVED:
6156 case -NFS4ERR_DELAY:
8478eaa1
N		 6157 if (nfs4_async_handle_error(task, server,
6158 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6159 rpc_restart_call_prepare(task);
6160 }
fbd4bfd1
CL		 6161}
6162
d3c7b7cc
TM		 6163static void nfs4_release_lockowner_release(void *calldata)
6164{
cf470c3e 6165 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6166 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6167 kfree(calldata);
6168}
6169
17280175 6170static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6171 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6172 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6173 .rpc_release = nfs4_release_lockowner_release,
6174};
6175
f1cdae87
JL		 6176static void
6177nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6178{
cf470c3e 6179 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6180 struct rpc_message msg = {
6181 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6182 };
6183
6184 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6185 return;
fbd4bfd1 6186
cf470c3e
TM		 6187 data = kmalloc(sizeof(*data), GFP_NOFS);
6188 if (!data)
f1cdae87 6189 return;
cf470c3e 6190 data->lsp = lsp;
5ae67c4f 6191 data->server = server;
cf470c3e
TM		 6192 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6193 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6194 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6195
cf470c3e 6196 msg.rpc_argp = &data->args;
b7e63a10
TM		 6197 msg.rpc_resp = &data->res;
6198 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6199 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6200}
6201
aa1870af
BF		 6202#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6203
64c2ce8b
AK		 6204static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6205 const void *buf, size_t buflen,
6206 int flags, int type)
6b3b5496 6207{
64c2ce8b
AK		 6208 if (strcmp(key, "") != 0)
6209 return -EINVAL;
4b580ee3 6210
2b0143b5 6211 return nfs4_proc_set_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6212}
6213
64c2ce8b
AK		 6214static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6215 void *buf, size_t buflen, int type)
6b3b5496 6216{
64c2ce8b
AK		 6217 if (strcmp(key, "") != 0)
6218 return -EINVAL;
aa1870af 6219
2b0143b5 6220 return nfs4_proc_get_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6221}
6222
64c2ce8b
AK		 6223static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6224 size_t list_len, const char *name,
6225 size_t name_len, int type)
6b3b5496 6226{
64c2ce8b 6227 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 6228
2b0143b5 6229 if (!nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))))
096455a2 6230 return 0;
64c2ce8b
AK		 6231
6232 if (list && len <= list_len)
6233 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6234 return len;
6b3b5496
BF		 6235}
6236
c9bccef6
DQ		 6237#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6238static inline int nfs4_server_supports_labels(struct nfs_server *server)
6239{
6240 return server->caps & NFS_CAP_SECURITY_LABEL;
6241}
6242
6243static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6244 const void *buf, size_t buflen,
6245 int flags, int type)
6246{
6247 if (security_ismaclabel(key))
6248 return nfs4_set_security_label(dentry, buf, buflen);
6249
6250 return -EOPNOTSUPP;
6251}
6252
6253static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6254 void *buf, size_t buflen, int type)
6255{
6256 if (security_ismaclabel(key))
2b0143b5 6257 return nfs4_get_security_label(d_inode(dentry), buf, buflen);
c9bccef6
DQ		 6258 return -EOPNOTSUPP;
6259}
6260
6261static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6262 size_t list_len, const char *name,
6263 size_t name_len, int type)
6264{
6265 size_t len = 0;
6266
2b0143b5
DH		 6267 if (nfs_server_capable(d_inode(dentry), NFS_CAP_SECURITY_LABEL)) {
6268 len = security_inode_listsecurity(d_inode(dentry), NULL, 0);
c9bccef6 6269 if (list && len <= list_len)
2b0143b5 6270 security_inode_listsecurity(d_inode(dentry), list, len);
c9bccef6
DQ		 6271 }
6272 return len;
6273}
6274
6275static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6276 .prefix = XATTR_SECURITY_PREFIX,
6277 .list = nfs4_xattr_list_nfs4_label,
6278 .get = nfs4_xattr_get_nfs4_label,
6279 .set = nfs4_xattr_set_nfs4_label,
6280};
6281#endif
6282
6283
533eb461
AA		 6284/*
6285 * nfs_fhget will use either the mounted_on_fileid or the fileid
6286 */
69aaaae1
TM		 6287static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6288{
533eb461
AA		 6289 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6290 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6291 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6292 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6293 return;
6294
6295 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6296 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6297 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6298 fattr->nlink = 2;
6299}
6300
f05d147f
BS		 6301static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6302 const struct qstr *name,
6303 struct nfs4_fs_locations *fs_locations,
6304 struct page *page)
683b57b4
TM		 6305{
6306 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6307 u32 bitmask[3] = {
361e624f 6308 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6309 };
6310 struct nfs4_fs_locations_arg args = {
6311 .dir_fh = NFS_FH(dir),
c228fd3a 6312 .name = name,
683b57b4
TM		 6313 .page = page,
6314 .bitmask = bitmask,
6315 };
22958463
BH		 6316 struct nfs4_fs_locations_res res = {
6317 .fs_locations = fs_locations,
6318 };
683b57b4
TM		 6319 struct rpc_message msg = {
6320 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6321 .rpc_argp = &args,
22958463 6322 .rpc_resp = &res,
683b57b4
TM		 6323 };
6324 int status;
6325
3110ff80 6326 dprintk("%s: start\n", __func__);
533eb461
AA		 6327
6328 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6329 * is not supported */
6330 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6331 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6332 else
6333 bitmask[0] |= FATTR4_WORD0_FILEID;
6334
c228fd3a 6335 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6336 fs_locations->server = server;
830b8e33 6337 fs_locations->nlocations = 0;
f05d147f 6338 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6339 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6340 return status;
6341}
6342
f05d147f
BS		 6343int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6344 const struct qstr *name,
6345 struct nfs4_fs_locations *fs_locations,
6346 struct page *page)
db0a9593
BS		 6347{
6348 struct nfs4_exception exception = { };
6349 int err;
6350 do {
078ea3df
TM		 6351 err = _nfs4_proc_fs_locations(client, dir, name,
6352 fs_locations, page);
6353 trace_nfs4_get_fs_locations(dir, name, err);
6354 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6355 &exception);
6356 } while (exception.retry);
6357 return err;
6358}
6359
b03d735b
CL		 6360/*
6361 * This operation also signals the server that this client is
6362 * performing migration recovery. The server can stop returning
6363 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6364 * appended to this compound to identify the client ID which is
6365 * performing recovery.
6366 */
6367static int _nfs40_proc_get_locations(struct inode *inode,
6368 struct nfs4_fs_locations *locations,
6369 struct page *page, struct rpc_cred *cred)
6370{
6371 struct nfs_server *server = NFS_SERVER(inode);
6372 struct rpc_clnt *clnt = server->client;
6373 u32 bitmask[2] = {
6374 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6375 };
6376 struct nfs4_fs_locations_arg args = {
6377 .clientid = server->nfs_client->cl_clientid,
6378 .fh = NFS_FH(inode),
6379 .page = page,
6380 .bitmask = bitmask,
6381 .migration = 1, /* skip LOOKUP */
6382 .renew = 1, /* append RENEW */
6383 };
6384 struct nfs4_fs_locations_res res = {
6385 .fs_locations = locations,
6386 .migration = 1,
6387 .renew = 1,
6388 };
6389 struct rpc_message msg = {
6390 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6391 .rpc_argp = &args,
6392 .rpc_resp = &res,
6393 .rpc_cred = cred,
6394 };
6395 unsigned long now = jiffies;
6396 int status;
6397
6398 nfs_fattr_init(&locations->fattr);
6399 locations->server = server;
6400 locations->nlocations = 0;
6401
6402 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6403 nfs4_set_sequence_privileged(&args.seq_args);
6404 status = nfs4_call_sync_sequence(clnt, server, &msg,
6405 &args.seq_args, &res.seq_res);
6406 if (status)
6407 return status;
6408
6409 renew_lease(server, now);
6410 return 0;
6411}
6412
6413#ifdef CONFIG_NFS_V4_1
6414
6415/*
6416 * This operation also signals the server that this client is
6417 * performing migration recovery. The server can stop asserting
6418 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6419 * performing this operation is identified in the SEQUENCE
6420 * operation in this compound.
6421 *
6422 * When the client supports GETATTR(fs_locations_info), it can
6423 * be plumbed in here.
6424 */
6425static int _nfs41_proc_get_locations(struct inode *inode,
6426 struct nfs4_fs_locations *locations,
6427 struct page *page, struct rpc_cred *cred)
6428{
6429 struct nfs_server *server = NFS_SERVER(inode);
6430 struct rpc_clnt *clnt = server->client;
6431 u32 bitmask[2] = {
6432 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6433 };
6434 struct nfs4_fs_locations_arg args = {
6435 .fh = NFS_FH(inode),
6436 .page = page,
6437 .bitmask = bitmask,
6438 .migration = 1, /* skip LOOKUP */
6439 };
6440 struct nfs4_fs_locations_res res = {
6441 .fs_locations = locations,
6442 .migration = 1,
6443 };
6444 struct rpc_message msg = {
6445 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6446 .rpc_argp = &args,
6447 .rpc_resp = &res,
6448 .rpc_cred = cred,
6449 };
6450 int status;
6451
6452 nfs_fattr_init(&locations->fattr);
6453 locations->server = server;
6454 locations->nlocations = 0;
6455
6456 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6457 nfs4_set_sequence_privileged(&args.seq_args);
6458 status = nfs4_call_sync_sequence(clnt, server, &msg,
6459 &args.seq_args, &res.seq_res);
6460 if (status == NFS4_OK &&
6461 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6462 status = -NFS4ERR_LEASE_MOVED;
6463 return status;
6464}
6465
6466#endif /* CONFIG_NFS_V4_1 */
6467
6468/**
6469 * nfs4_proc_get_locations - discover locations for a migrated FSID
6470 * @inode: inode on FSID that is migrating
6471 * @locations: result of query
6472 * @page: buffer
6473 * @cred: credential to use for this operation
6474 *
6475 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6476 * operation failed, or a negative errno if a local error occurred.
6477 *
6478 * On success, "locations" is filled in, but if the server has
6479 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6480 * asserted.
6481 *
6482 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6483 * from this client that require migration recovery.
6484 */
6485int nfs4_proc_get_locations(struct inode *inode,
6486 struct nfs4_fs_locations *locations,
6487 struct page *page, struct rpc_cred *cred)
6488{
6489 struct nfs_server *server = NFS_SERVER(inode);
6490 struct nfs_client *clp = server->nfs_client;
6491 const struct nfs4_mig_recovery_ops *ops =
6492 clp->cl_mvops->mig_recovery_ops;
6493 struct nfs4_exception exception = { };
6494 int status;
6495
6496 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6497 (unsigned long long)server->fsid.major,
6498 (unsigned long long)server->fsid.minor,
6499 clp->cl_hostname);
6500 nfs_display_fhandle(NFS_FH(inode), __func__);
6501
6502 do {
6503 status = ops->get_locations(inode, locations, page, cred);
6504 if (status != -NFS4ERR_DELAY)
6505 break;
6506 nfs4_handle_exception(server, status, &exception);
6507 } while (exception.retry);
6508 return status;
6509}
6510
44c99933
CL		 6511/*
6512 * This operation also signals the server that this client is
6513 * performing "lease moved" recovery. The server can stop
6514 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6515 * is appended to this compound to identify the client ID which is
6516 * performing recovery.
6517 */
6518static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6519{
6520 struct nfs_server *server = NFS_SERVER(inode);
6521 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6522 struct rpc_clnt *clnt = server->client;
6523 struct nfs4_fsid_present_arg args = {
6524 .fh = NFS_FH(inode),
6525 .clientid = clp->cl_clientid,
6526 .renew = 1, /* append RENEW */
6527 };
6528 struct nfs4_fsid_present_res res = {
6529 .renew = 1,
6530 };
6531 struct rpc_message msg = {
6532 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6533 .rpc_argp = &args,
6534 .rpc_resp = &res,
6535 .rpc_cred = cred,
6536 };
6537 unsigned long now = jiffies;
6538 int status;
6539
6540 res.fh = nfs_alloc_fhandle();
6541 if (res.fh == NULL)
6542 return -ENOMEM;
6543
6544 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6545 nfs4_set_sequence_privileged(&args.seq_args);
6546 status = nfs4_call_sync_sequence(clnt, server, &msg,
6547 &args.seq_args, &res.seq_res);
6548 nfs_free_fhandle(res.fh);
6549 if (status)
6550 return status;
6551
6552 do_renew_lease(clp, now);
6553 return 0;
6554}
6555
6556#ifdef CONFIG_NFS_V4_1
6557
6558/*
6559 * This operation also signals the server that this client is
6560 * performing "lease moved" recovery. The server can stop asserting
6561 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6562 * this operation is identified in the SEQUENCE operation in this
6563 * compound.
6564 */
6565static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6566{
6567 struct nfs_server *server = NFS_SERVER(inode);
6568 struct rpc_clnt *clnt = server->client;
6569 struct nfs4_fsid_present_arg args = {
6570 .fh = NFS_FH(inode),
6571 };
6572 struct nfs4_fsid_present_res res = {
6573 };
6574 struct rpc_message msg = {
6575 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6576 .rpc_argp = &args,
6577 .rpc_resp = &res,
6578 .rpc_cred = cred,
6579 };
6580 int status;
6581
6582 res.fh = nfs_alloc_fhandle();
6583 if (res.fh == NULL)
6584 return -ENOMEM;
6585
6586 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6587 nfs4_set_sequence_privileged(&args.seq_args);
6588 status = nfs4_call_sync_sequence(clnt, server, &msg,
6589 &args.seq_args, &res.seq_res);
6590 nfs_free_fhandle(res.fh);
6591 if (status == NFS4_OK &&
6592 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6593 status = -NFS4ERR_LEASE_MOVED;
6594 return status;
6595}
6596
6597#endif /* CONFIG_NFS_V4_1 */
6598
6599/**
6600 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6601 * @inode: inode on FSID to check
6602 * @cred: credential to use for this operation
6603 *
6604 * Server indicates whether the FSID is present, moved, or not
6605 * recognized. This operation is necessary to clear a LEASE_MOVED
6606 * condition for this client ID.
6607 *
6608 * Returns NFS4_OK if the FSID is present on this server,
6609 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6610 * NFS4ERR code if some error occurred on the server, or a
6611 * negative errno if a local failure occurred.
6612 */
6613int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6614{
6615 struct nfs_server *server = NFS_SERVER(inode);
6616 struct nfs_client *clp = server->nfs_client;
6617 const struct nfs4_mig_recovery_ops *ops =
6618 clp->cl_mvops->mig_recovery_ops;
6619 struct nfs4_exception exception = { };
6620 int status;
6621
6622 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6623 (unsigned long long)server->fsid.major,
6624 (unsigned long long)server->fsid.minor,
6625 clp->cl_hostname);
6626 nfs_display_fhandle(NFS_FH(inode), __func__);
6627
6628 do {
6629 status = ops->fsid_present(inode, cred);
6630 if (status != -NFS4ERR_DELAY)
6631 break;
6632 nfs4_handle_exception(server, status, &exception);
6633 } while (exception.retry);
6634 return status;
6635}
6636
5ec16a85 6637/**
a5250def
WAA		 6638 * If 'use_integrity' is true and the state managment nfs_client
6639 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6640 * and the machine credential as per RFC3530bis and RFC5661 Security
6641 * Considerations sections. Otherwise, just use the user cred with the
6642 * filesystem's rpc_client.
5ec16a85 6643 */
a5250def 6644static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6645{
6646 int status;
6647 struct nfs4_secinfo_arg args = {
6648 .dir_fh = NFS_FH(dir),
6649 .name = name,
6650 };
6651 struct nfs4_secinfo_res res = {
6652 .flavors = flavors,
6653 };
6654 struct rpc_message msg = {
6655 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6656 .rpc_argp = &args,
6657 .rpc_resp = &res,
6658 };
a5250def 6659 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6660 struct rpc_cred *cred = NULL;
a5250def
WAA		 6661
6662 if (use_integrity) {
6663 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6664 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6665 msg.rpc_cred = cred;
a5250def 6666 }
5a5ea0d4
BS		 6667
6668 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6669
6670 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6671 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6672
a5250def
WAA		 6673 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6674 &res.seq_res, 0);
5a5ea0d4 6675 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6676
7cb852df
WAA		 6677 if (cred)
6678 put_rpccred(cred);
a5250def 6679
5a5ea0d4
BS		 6680 return status;
6681}
6682
72de53ec
BS		 6683int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6684 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6685{
6686 struct nfs4_exception exception = { };
6687 int err;
6688 do {
a5250def
WAA		 6689 err = -NFS4ERR_WRONGSEC;
6690
6691 /* try to use integrity protection with machine cred */
6692 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6693 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6694
6695 /*
6696 * if unable to use integrity protection, or SECINFO with
6697 * integrity protection returns NFS4ERR_WRONGSEC (which is
6698 * disallowed by spec, but exists in deployed servers) use
6699 * the current filesystem's rpc_client and the user cred.
6700 */
6701 if (err == -NFS4ERR_WRONGSEC)
6702 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6703
078ea3df
TM		 6704 trace_nfs4_secinfo(dir, name, err);
6705 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6706 &exception);
6707 } while (exception.retry);
6708 return err;
6709}
6710
557134a3 6711#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6712/*
6713 * Check the exchange flags returned by the server for invalid flags, having
6714 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6715 * DS flags set.
6716 */
6717static int nfs4_check_cl_exchange_flags(u32 flags)
6718{
6719 if (flags & ~EXCHGID4_FLAG_MASK_R)
6720 goto out_inval;
6721 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6722 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6723 goto out_inval;
6724 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6725 goto out_inval;
6726 return NFS_OK;
6727out_inval:
6728 return -NFS4ERR_INVAL;
6729}
6730
78fe0f41 6731static bool
79d4e1f0
CL		 6732nfs41_same_server_scope(struct nfs41_server_scope *a,
6733 struct nfs41_server_scope *b)
78fe0f41
WAA		 6734{
6735 if (a->server_scope_sz == b->server_scope_sz &&
6736 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6737 return true;
6738
6739 return false;
6740}
6741
7c44f1ae
WAA		 6742/*
6743 * nfs4_proc_bind_conn_to_session()
6744 *
6745 * The 4.1 client currently uses the same TCP connection for the
6746 * fore and backchannel.
6747 */
2cf047c9 6748int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6749{
6750 int status;
71a097c6
TM		 6751 struct nfs41_bind_conn_to_session_args args = {
6752 .client = clp,
6753 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6754 };
7c44f1ae
WAA		 6755 struct nfs41_bind_conn_to_session_res res;
6756 struct rpc_message msg = {
6757 .rpc_proc =
6758 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 6759 .rpc_argp = &args,
7c44f1ae 6760 .rpc_resp = &res,
2cf047c9 6761 .rpc_cred = cred,
7c44f1ae
WAA		 6762 };
6763
6764 dprintk("--> %s\n", __func__);
7c44f1ae 6765
71a097c6
TM		 6766 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6767 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6768 args.dir = NFS4_CDFC4_FORE;
7c44f1ae
WAA		 6769
6770 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6771 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 6772 if (status == 0) {
71a097c6 6773 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 6774 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6775 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6776 status = -EIO;
71a097c6 6777 goto out;
7c44f1ae 6778 }
71a097c6 6779 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 6780 dprintk("NFS: %s: Unexpected direction from server\n",
6781 __func__);
6782 status = -EIO;
71a097c6 6783 goto out;
7c44f1ae 6784 }
71a097c6 6785 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 6786 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6787 __func__);
6788 status = -EIO;
71a097c6 6789 goto out;
7c44f1ae
WAA		 6790 }
6791 }
7c44f1ae
WAA		 6792out:
6793 dprintk("<-- %s status= %d\n", __func__, status);
6794 return status;
6795}
6796
99fe60d0 6797/*
fa940720
WAA		 6798 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6799 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6800 */
6801static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6802 .how = SP4_MACH_CRED,
6803 .enforce.u.words = {
6804 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6805 1 << (OP_EXCHANGE_ID - 32) |
6806 1 << (OP_CREATE_SESSION - 32) |
6807 1 << (OP_DESTROY_SESSION - 32) |
6808 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6809 },
6810 .allow.u.words = {
6811 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6812 1 << (OP_LOCKU) |
6813 1 << (OP_COMMIT),
8b5bee2e 6814 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6815 1 << (OP_SECINFO_NO_NAME - 32) |
6816 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6817 1 << (OP_FREE_STATEID - 32) |
6818 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6819 }
6820};
6821
6822/*
6823 * Select the state protection mode for client `clp' given the server results
6824 * from exchange_id in `sp'.
99fe60d0 6825 *
2031cd1a
WAA		 6826 * Returns 0 on success, negative errno otherwise.
6827 */
6828static int nfs4_sp4_select_mode(struct nfs_client *clp,
6829 struct nfs41_state_protection *sp)
6830{
6831 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6832 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6833 1 << (OP_EXCHANGE_ID - 32) |
6834 1 << (OP_CREATE_SESSION - 32) |
6835 1 << (OP_DESTROY_SESSION - 32) |
6836 1 << (OP_DESTROY_CLIENTID - 32)
6837 };
6838 unsigned int i;
6839
6840 if (sp->how == SP4_MACH_CRED) {
6841 /* Print state protect result */
6842 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6843 for (i = 0; i <= LAST_NFS4_OP; i++) {
6844 if (test_bit(i, sp->enforce.u.longs))
6845 dfprintk(MOUNT, " enforce op %d\n", i);
6846 if (test_bit(i, sp->allow.u.longs))
6847 dfprintk(MOUNT, " allow op %d\n", i);
6848 }
6849
6850 /* make sure nothing is on enforce list that isn't supported */
6851 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6852 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6853 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6854 return -EINVAL;
6855 }
6856 }
6857
6858 /*
6859 * Minimal mode - state operations are allowed to use machine
6860 * credential. Note this already happens by default, so the
6861 * client doesn't have to do anything more than the negotiation.
6862 *
6863 * NOTE: we don't care if EXCHANGE_ID is in the list -
6864 * we're already using the machine cred for exchange_id
6865 * and will never use a different cred.
6866 */
6867 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6868 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6869 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6870 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6871 dfprintk(MOUNT, "sp4_mach_cred:\n");
6872 dfprintk(MOUNT, " minimal mode enabled\n");
6873 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6874 } else {
6875 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6876 return -EINVAL;
6877 }
fa940720
WAA		 6878
6879 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6880 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6881 dfprintk(MOUNT, " cleanup mode enabled\n");
6882 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6883 }
8b5bee2e
WAA		 6884
6885 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6886 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6887 dfprintk(MOUNT, " secinfo mode enabled\n");
6888 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6889 }
3787d506
WAA		 6890
6891 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6892 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6893 dfprintk(MOUNT, " stateid mode enabled\n");
6894 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6895 }
8c21c62c
WAA		 6896
6897 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6898 dfprintk(MOUNT, " write mode enabled\n");
6899 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6900 }
6901
6902 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6903 dfprintk(MOUNT, " commit mode enabled\n");
6904 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6905 }
2031cd1a
WAA		 6906 }
6907
6908 return 0;
6909}
6910
6911/*
6912 * _nfs4_proc_exchange_id()
6bbb4ae8 6913 *
2031cd1a 6914 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6915 */
2031cd1a
WAA		 6916static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6917 u32 sp4_how)
99fe60d0
BH		 6918{
6919 nfs4_verifier verifier;
6920 struct nfs41_exchange_id_args args = {
cd93710e 6921 .verifier = &verifier,
99fe60d0 6922 .client = clp,
cd3fadec 6923#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6924 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6925 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6926 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6927#else
6928 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6929 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6930#endif
99fe60d0
BH		 6931 };
6932 struct nfs41_exchange_id_res res = {
32b01310 6933 0
99fe60d0
BH		 6934 };
6935 int status;
6936 struct rpc_message msg = {
6937 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6938 .rpc_argp = &args,
6939 .rpc_resp = &res,
6940 .rpc_cred = cred,
6941 };
99fe60d0 6942
f092075d 6943 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 6944
6945 status = nfs4_init_uniform_client_string(clp);
6946 if (status)
3a6bb738 6947 goto out;
3a6bb738
JL		 6948
6949 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6bbb4ae8 6950 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 6951 clp->cl_owner_id);
99fe60d0 6952
acdeb69d 6953 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6954 GFP_NOFS);
acdeb69d 6955 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6956 status = -ENOMEM;
6957 goto out;
6958 }
78fe0f41 6959
79d4e1f0 6960 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6961 GFP_NOFS);
177313f1 6962 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6963 status = -ENOMEM;
acdeb69d 6964 goto out_server_owner;
abe9a6d5 6965 }
78fe0f41 6966
bbafffd2 6967 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6968 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6969 status = -ENOMEM;
6970 goto out_server_scope;
6971 }
6972
2031cd1a
WAA		 6973 switch (sp4_how) {
6974 case SP4_NONE:
6975 args.state_protect.how = SP4_NONE;
6976 break;
6977
6978 case SP4_MACH_CRED:
6979 args.state_protect = nfs4_sp4_mach_cred_request;
6980 break;
6981
6982 default:
6983 /* unsupported! */
6984 WARN_ON_ONCE(1);
6985 status = -EINVAL;
6b55970b 6986 goto out_impl_id;
2031cd1a
WAA		 6987 }
6988
1bd714f2 6989 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6990 trace_nfs4_exchange_id(clp, status);
177313f1 6991 if (status == 0)
32b01310 6992 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6993
2031cd1a
WAA		 6994 if (status == 0)
6995 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6996
acdeb69d 6997 if (status == 0) {
32b01310 6998 clp->cl_clientid = res.clientid;
e11259f9
TM		 6999 clp->cl_exchange_flags = res.flags;
7000 /* Client ID is not confirmed */
7001 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7002 clear_bit(NFS4_SESSION_ESTABLISHED,
7003 &clp->cl_session->session_state);
32b01310 7004 clp->cl_seqid = res.seqid;
e11259f9 7005 }
32b01310 7006
acdeb69d
CL		 7007 kfree(clp->cl_serverowner);
7008 clp->cl_serverowner = res.server_owner;
7009 res.server_owner = NULL;
78fe0f41 7010
7d2ed9ac 7011 /* use the most recent implementation id */
59155546
CL		 7012 kfree(clp->cl_implid);
7013 clp->cl_implid = res.impl_id;
6b55970b 7014 res.impl_id = NULL;
7d2ed9ac 7015
177313f1 7016 if (clp->cl_serverscope != NULL &&
79d4e1f0 7017 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 7018 res.server_scope)) {
7019 dprintk("%s: server_scope mismatch detected\n",
7020 __func__);
7021 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 7022 kfree(clp->cl_serverscope);
7023 clp->cl_serverscope = NULL;
78fe0f41
WAA		 7024 }
7025
177313f1 7026 if (clp->cl_serverscope == NULL) {
79d4e1f0 7027 clp->cl_serverscope = res.server_scope;
6b55970b 7028 res.server_scope = NULL;
abe9a6d5 7029 }
6b55970b 7030 }
7d2ed9ac 7031
6b55970b
KM		 7032out_impl_id:
7033 kfree(res.impl_id);
7d2ed9ac 7034out_server_scope:
abe9a6d5 7035 kfree(res.server_scope);
6b55970b
KM		 7036out_server_owner:
7037 kfree(res.server_owner);
abe9a6d5 7038out:
177313f1 7039 if (clp->cl_implid != NULL)
6bbb4ae8 7040 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 7041 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 7042 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 7043 clp->cl_implid->date.seconds,
7044 clp->cl_implid->date.nseconds);
6bbb4ae8 7045 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 7046 return status;
7047}
7048
2031cd1a
WAA		 7049/*
7050 * nfs4_proc_exchange_id()
7051 *
7052 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7053 *
7054 * Since the clientid has expired, all compounds using sessions
7055 * associated with the stale clientid will be returning
7056 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7057 * be in some phase of session reset.
7058 *
7059 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7060 */
7061int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7062{
7063 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7064 int status;
7065
7066 /* try SP4_MACH_CRED if krb5i/p */
7067 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7068 authflavor == RPC_AUTH_GSS_KRB5P) {
7069 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
7070 if (!status)
7071 return 0;
7072 }
7073
7074 /* try SP4_NONE */
7075 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
7076}
7077
66245539
TM		 7078static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7079 struct rpc_cred *cred)
7080{
7081 struct rpc_message msg = {
7082 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7083 .rpc_argp = clp,
7084 .rpc_cred = cred,
7085 };
7086 int status;
7087
7088 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7089 trace_nfs4_destroy_clientid(clp, status);
66245539 7090 if (status)
02c67525 7091 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7092 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7093 return status;
7094}
7095
7096static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7097 struct rpc_cred *cred)
7098{
7099 unsigned int loop;
7100 int ret;
7101
7102 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7103 ret = _nfs4_proc_destroy_clientid(clp, cred);
7104 switch (ret) {
7105 case -NFS4ERR_DELAY:
7106 case -NFS4ERR_CLIENTID_BUSY:
7107 ssleep(1);
7108 break;
7109 default:
7110 return ret;
7111 }
7112 }
7113 return 0;
7114}
7115
7116int nfs4_destroy_clientid(struct nfs_client *clp)
7117{
7118 struct rpc_cred *cred;
7119 int ret = 0;
7120
7121 if (clp->cl_mvops->minor_version < 1)
7122 goto out;
7123 if (clp->cl_exchange_flags == 0)
7124 goto out;
05f4c350
CL		 7125 if (clp->cl_preserve_clid)
7126 goto out;
73d8bde5 7127 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7128 ret = nfs4_proc_destroy_clientid(clp, cred);
7129 if (cred)
7130 put_rpccred(cred);
7131 switch (ret) {
7132 case 0:
7133 case -NFS4ERR_STALE_CLIENTID:
7134 clp->cl_exchange_flags = 0;
7135 }
7136out:
7137 return ret;
7138}
7139
2050f0cc
AA		 7140struct nfs4_get_lease_time_data {
7141 struct nfs4_get_lease_time_args *args;
7142 struct nfs4_get_lease_time_res *res;
7143 struct nfs_client *clp;
7144};
7145
7146static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7147 void *calldata)
7148{
2050f0cc
AA		 7149 struct nfs4_get_lease_time_data *data =
7150 (struct nfs4_get_lease_time_data *)calldata;
7151
7152 dprintk("--> %s\n", __func__);
7153 /* just setup sequence, do not trigger session recovery
7154 since we're invoked within one */
d9afbd1b
TM		 7155 nfs41_setup_sequence(data->clp->cl_session,
7156 &data->args->la_seq_args,
7157 &data->res->lr_seq_res,
7158 task);
2050f0cc
AA		 7159 dprintk("<-- %s\n", __func__);
7160}
7161
7162/*
7163 * Called from nfs4_state_manager thread for session setup, so don't recover
7164 * from sequence operation or clientid errors.
7165 */
7166static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7167{
7168 struct nfs4_get_lease_time_data *data =
7169 (struct nfs4_get_lease_time_data *)calldata;
7170
7171 dprintk("--> %s\n", __func__);
14516c3a
TM		 7172 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7173 return;
2050f0cc
AA		 7174 switch (task->tk_status) {
7175 case -NFS4ERR_DELAY:
7176 case -NFS4ERR_GRACE:
7177 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7178 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7179 task->tk_status = 0;
a8a4ae3a
AA		 7180 /* fall through */
7181 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7182 rpc_restart_call_prepare(task);
2050f0cc
AA		 7183 return;
7184 }
2050f0cc
AA		 7185 dprintk("<-- %s\n", __func__);
7186}
7187
17280175 7188static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7189 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7190 .rpc_call_done = nfs4_get_lease_time_done,
7191};
7192
7193int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7194{
7195 struct rpc_task *task;
7196 struct nfs4_get_lease_time_args args;
7197 struct nfs4_get_lease_time_res res = {
7198 .lr_fsinfo = fsinfo,
7199 };
7200 struct nfs4_get_lease_time_data data = {
7201 .args = &args,
7202 .res = &res,
7203 .clp = clp,
7204 };
7205 struct rpc_message msg = {
7206 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7207 .rpc_argp = &args,
7208 .rpc_resp = &res,
7209 };
7210 struct rpc_task_setup task_setup = {
7211 .rpc_client = clp->cl_rpcclient,
7212 .rpc_message = &msg,
7213 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7214 .callback_data = &data,
7215 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7216 };
7217 int status;
7218
a9c92d6b 7219 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7220 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7221 dprintk("--> %s\n", __func__);
7222 task = rpc_run_task(&task_setup);
7223
7224 if (IS_ERR(task))
7225 status = PTR_ERR(task);
7226 else {
7227 status = task->tk_status;
7228 rpc_put_task(task);
7229 }
7230 dprintk("<-- %s return %d\n", __func__, status);
7231
7232 return status;
7233}
7234
fc931582
AA		 7235/*
7236 * Initialize the values to be used by the client in CREATE_SESSION
7237 * If nfs4_init_session set the fore channel request and response sizes,
7238 * use them.
7239 *
7240 * Set the back channel max_resp_sz_cached to zero to force the client to
7241 * always set csa_cachethis to FALSE because the current implementation
7242 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7243 */
7244static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7245{
18aad3d5
AA		 7246 unsigned int max_rqst_sz, max_resp_sz;
7247
7248 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7249 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7250
fc931582 7251 /* Fore channel attributes */
18aad3d5
AA		 7252 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7253 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7254 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7255 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7256
7257 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7258 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7259 __func__,
7260 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7261 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7262
7263 /* Back channel attributes */
fc931582
AA		 7264 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7265 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7266 args->bc_attrs.max_resp_sz_cached = 0;
7267 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7268 args->bc_attrs.max_reqs = 1;
7269
7270 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7271 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7272 __func__,
7273 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7274 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7275 args->bc_attrs.max_reqs);
7276}
7277
79969dd1
TM		 7278static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7279 struct nfs41_create_session_res *res)
8d35301d 7280{
43c2e885 7281 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7282 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7283
43c2e885
BF		 7284 if (rcvd->max_resp_sz > sent->max_resp_sz)
7285 return -EINVAL;
7286 /*
7287 * Our requested max_ops is the minimum we need; we're not
7288 * prepared to break up compounds into smaller pieces than that.
7289 * So, no point even trying to continue if the server won't
7290 * cooperate:
7291 */
7292 if (rcvd->max_ops < sent->max_ops)
7293 return -EINVAL;
7294 if (rcvd->max_reqs == 0)
7295 return -EINVAL;
b4b9a0c1
VG		 7296 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7297 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7298 return 0;
8d35301d
AA		 7299}
7300
79969dd1
TM		 7301static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7302 struct nfs41_create_session_res *res)
43c2e885
BF		 7303{
7304 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7305 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7306
b1c0df5f
TM		 7307 if (!(res->flags & SESSION4_BACK_CHAN))
7308 goto out;
43c2e885
BF		 7309 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7310 return -EINVAL;
7311 if (rcvd->max_resp_sz < sent->max_resp_sz)
7312 return -EINVAL;
7313 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7314 return -EINVAL;
7315 /* These would render the backchannel useless: */
b4b9a0c1 7316 if (rcvd->max_ops != sent->max_ops)
43c2e885 7317 return -EINVAL;
b4b9a0c1 7318 if (rcvd->max_reqs != sent->max_reqs)
43c2e885 7319 return -EINVAL;
b1c0df5f 7320out:
43c2e885
BF		 7321 return 0;
7322}
8d35301d 7323
8d35301d 7324static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7325 struct nfs41_create_session_res *res)
8d35301d 7326{
43c2e885 7327 int ret;
8d35301d 7328
79969dd1 7329 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7330 if (ret)
7331 return ret;
79969dd1
TM		 7332 return nfs4_verify_back_channel_attrs(args, res);
7333}
7334
7335static void nfs4_update_session(struct nfs4_session *session,
7336 struct nfs41_create_session_res *res)
7337{
7338 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7339 /* Mark client id and session as being confirmed */
7340 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7341 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7342 session->flags = res->flags;
7343 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7344 if (res->flags & SESSION4_BACK_CHAN)
7345 memcpy(&session->bc_attrs, &res->bc_attrs,
7346 sizeof(session->bc_attrs));
8d35301d
AA		 7347}
7348
848f5bda
TM		 7349static int _nfs4_proc_create_session(struct nfs_client *clp,
7350 struct rpc_cred *cred)
fc931582
AA		 7351{
7352 struct nfs4_session *session = clp->cl_session;
7353 struct nfs41_create_session_args args = {
7354 .client = clp,
79969dd1
TM		 7355 .clientid = clp->cl_clientid,
7356 .seqid = clp->cl_seqid,
fc931582
AA		 7357 .cb_program = NFS4_CALLBACK,
7358 };
79969dd1
TM		 7359 struct nfs41_create_session_res res;
7360
fc931582
AA		 7361 struct rpc_message msg = {
7362 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7363 .rpc_argp = &args,
7364 .rpc_resp = &res,
848f5bda 7365 .rpc_cred = cred,
fc931582
AA		 7366 };
7367 int status;
7368
7369 nfs4_init_channel_attrs(&args);
0f91421e 7370 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7371
1bd714f2 7372 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7373 trace_nfs4_create_session(clp, status);
fc931582 7374
43095d39 7375 if (!status) {
8d35301d 7376 /* Verify the session's negotiated channel_attrs values */
79969dd1 7377 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7378 /* Increment the clientid slot sequence id */
79969dd1
TM		 7379 if (clp->cl_seqid == res.seqid)
7380 clp->cl_seqid++;
7381 if (status)
7382 goto out;
7383 nfs4_update_session(session, &res);
fc931582 7384 }
79969dd1 7385out:
fc931582
AA		 7386 return status;
7387}
7388
7389/*
7390 * Issues a CREATE_SESSION operation to the server.
7391 * It is the responsibility of the caller to verify the session is
7392 * expired before calling this routine.
7393 */
848f5bda 7394int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7395{
7396 int status;
7397 unsigned *ptr;
fc931582
AA		 7398 struct nfs4_session *session = clp->cl_session;
7399
7400 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7401
848f5bda 7402 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7403 if (status)
7404 goto out;
7405
aacd5537
AA		 7406 /* Init or reset the session slot tables */
7407 status = nfs4_setup_session_slot_tables(session);
7408 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7409 if (status)
7410 goto out;
7411
7412 ptr = (unsigned *)&session->sess_id.data[0];
7413 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7414 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7415out:
7416 dprintk("<-- %s\n", __func__);
7417 return status;
7418}
7419
0f3e66c6
AA		 7420/*
7421 * Issue the over-the-wire RPC DESTROY_SESSION.
7422 * The caller must serialize access to this routine.
7423 */
848f5bda
TM		 7424int nfs4_proc_destroy_session(struct nfs4_session *session,
7425 struct rpc_cred *cred)
0f3e66c6 7426{
848f5bda
TM		 7427 struct rpc_message msg = {
7428 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7429 .rpc_argp = session,
7430 .rpc_cred = cred,
7431 };
0f3e66c6 7432 int status = 0;
0f3e66c6
AA		 7433
7434 dprintk("--> nfs4_proc_destroy_session\n");
7435
7436 /* session is still being setup */
e11259f9
TM		 7437 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7438 return 0;
0f3e66c6 7439
1bd714f2 7440 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7441 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7442
7443 if (status)
08106ac7 7444 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7445 "Session has been destroyed regardless...\n", status);
7446
7447 dprintk("<-- nfs4_proc_destroy_session\n");
7448 return status;
7449}
7450
fc01cea9
AA		 7451/*
7452 * Renew the cl_session lease.
7453 */
d5f8d3fe
TM		 7454struct nfs4_sequence_data {
7455 struct nfs_client *clp;
7456 struct nfs4_sequence_args args;
7457 struct nfs4_sequence_res res;
7458};
7459
dc96aef9
AB		 7460static void nfs41_sequence_release(void *data)
7461{
d5f8d3fe
TM		 7462 struct nfs4_sequence_data *calldata = data;
7463 struct nfs_client *clp = calldata->clp;
dc96aef9 7464
7135840f
AB		 7465 if (atomic_read(&clp->cl_count) > 1)
7466 nfs4_schedule_state_renewal(clp);
7467 nfs_put_client(clp);
d5f8d3fe 7468 kfree(calldata);
dc96aef9
AB		 7469}
7470
aa5190d0
TM		 7471static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7472{
7473 switch(task->tk_status) {
7474 case -NFS4ERR_DELAY:
aa5190d0
TM		 7475 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7476 return -EAGAIN;
7477 default:
0400a6b0 7478 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7479 }
7480 return 0;
7481}
7482
dc96aef9 7483static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7484{
d5f8d3fe
TM		 7485 struct nfs4_sequence_data *calldata = data;
7486 struct nfs_client *clp = calldata->clp;
fc01cea9 7487
14516c3a
TM		 7488 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7489 return;
fc01cea9 7490
c6d01c6f 7491 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7492 if (task->tk_status < 0) {
7493 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7494 if (atomic_read(&clp->cl_count) == 1)
7495 goto out;
fc01cea9 7496
aa5190d0
TM		 7497 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7498 rpc_restart_call_prepare(task);
fc01cea9
AA		 7499 return;
7500 }
7501 }
fc01cea9 7502 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7503out:
fc01cea9
AA		 7504 dprintk("<-- %s\n", __func__);
7505}
7506
7507static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7508{
d5f8d3fe
TM		 7509 struct nfs4_sequence_data *calldata = data;
7510 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7511 struct nfs4_sequence_args *args;
7512 struct nfs4_sequence_res *res;
7513
fc01cea9
AA		 7514 args = task->tk_msg.rpc_argp;
7515 res = task->tk_msg.rpc_resp;
7516
d9afbd1b 7517 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7518}
7519
7520static const struct rpc_call_ops nfs41_sequence_ops = {
7521 .rpc_call_done = nfs41_sequence_call_done,
7522 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7523 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7524};
7525
8fe72bac
TM		 7526static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7527 struct rpc_cred *cred,
7528 bool is_privileged)
fc01cea9 7529{
d5f8d3fe 7530 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7531 struct rpc_message msg = {
7532 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7533 .rpc_cred = cred,
7534 };
71ac6da9
TM		 7535 struct rpc_task_setup task_setup_data = {
7536 .rpc_client = clp->cl_rpcclient,
7537 .rpc_message = &msg,
8fe72bac 7538 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7539 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7540 };
fc01cea9 7541
7135840f 7542 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7543 return ERR_PTR(-EIO);
dfb4f309 7544 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7545 if (calldata == NULL) {
7135840f 7546 nfs_put_client(clp);
71ac6da9 7547 return ERR_PTR(-ENOMEM);
fc01cea9 7548 }
a9c92d6b 7549 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7550 if (is_privileged)
7551 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7552 msg.rpc_argp = &calldata->args;
7553 msg.rpc_resp = &calldata->res;
7554 calldata->clp = clp;
71ac6da9 7555 task_setup_data.callback_data = calldata;
fc01cea9 7556
71ac6da9
TM		 7557 return rpc_run_task(&task_setup_data);
7558}
7559
2f60ea6b 7560static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7561{
7562 struct rpc_task *task;
7563 int ret = 0;
7564
2f60ea6b 7565 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7566 return -EAGAIN;
8fe72bac 7567 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7568 if (IS_ERR(task))
7569 ret = PTR_ERR(task);
7570 else
bf294b41 7571 rpc_put_task_async(task);
71ac6da9
TM		 7572 dprintk("<-- %s status=%d\n", __func__, ret);
7573 return ret;
7574}
7575
7576static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7577{
7578 struct rpc_task *task;
7579 int ret;
7580
8fe72bac 7581 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7582 if (IS_ERR(task)) {
7583 ret = PTR_ERR(task);
7584 goto out;
7585 }
7586 ret = rpc_wait_for_completion_task(task);
be824167 7587 if (!ret)
71ac6da9
TM		 7588 ret = task->tk_status;
7589 rpc_put_task(task);
7590out:
7591 dprintk("<-- %s status=%d\n", __func__, ret);
7592 return ret;
fc01cea9
AA		 7593}
7594
fce5c838
RL		 7595struct nfs4_reclaim_complete_data {
7596 struct nfs_client *clp;
7597 struct nfs41_reclaim_complete_args arg;
7598 struct nfs41_reclaim_complete_res res;
7599};
7600
7601static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7602{
7603 struct nfs4_reclaim_complete_data *calldata = data;
7604
d9afbd1b
TM		 7605 nfs41_setup_sequence(calldata->clp->cl_session,
7606 &calldata->arg.seq_args,
7607 &calldata->res.seq_res,
7608 task);
fce5c838
RL		 7609}
7610
aa5190d0
TM		 7611static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7612{
7613 switch(task->tk_status) {
7614 case 0:
7615 case -NFS4ERR_COMPLETE_ALREADY:
7616 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7617 break;
7618 case -NFS4ERR_DELAY:
aa5190d0 7619 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7620 /* fall through */
7621 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7622 return -EAGAIN;
7623 default:
0400a6b0 7624 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7625 }
7626 return 0;
7627}
7628
fce5c838
RL		 7629static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7630{
7631 struct nfs4_reclaim_complete_data *calldata = data;
7632 struct nfs_client *clp = calldata->clp;
7633 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7634
7635 dprintk("--> %s\n", __func__);
14516c3a
TM		 7636 if (!nfs41_sequence_done(task, res))
7637 return;
fce5c838 7638
c6d01c6f 7639 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7640 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7641 rpc_restart_call_prepare(task);
7642 return;
7643 }
fce5c838
RL		 7644 dprintk("<-- %s\n", __func__);
7645}
7646
7647static void nfs4_free_reclaim_complete_data(void *data)
7648{
7649 struct nfs4_reclaim_complete_data *calldata = data;
7650
7651 kfree(calldata);
7652}
7653
7654static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7655 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7656 .rpc_call_done = nfs4_reclaim_complete_done,
7657 .rpc_release = nfs4_free_reclaim_complete_data,
7658};
7659
7660/*
7661 * Issue a global reclaim complete.
7662 */
965e9c23
TM		 7663static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7664 struct rpc_cred *cred)
fce5c838
RL		 7665{
7666 struct nfs4_reclaim_complete_data *calldata;
7667 struct rpc_task *task;
7668 struct rpc_message msg = {
7669 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7670 .rpc_cred = cred,
fce5c838
RL		 7671 };
7672 struct rpc_task_setup task_setup_data = {
7673 .rpc_client = clp->cl_rpcclient,
7674 .rpc_message = &msg,
7675 .callback_ops = &nfs4_reclaim_complete_call_ops,
7676 .flags = RPC_TASK_ASYNC,
7677 };
7678 int status = -ENOMEM;
7679
7680 dprintk("--> %s\n", __func__);
8535b2be 7681 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7682 if (calldata == NULL)
7683 goto out;
7684 calldata->clp = clp;
7685 calldata->arg.one_fs = 0;
fce5c838 7686
a9c92d6b 7687 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7688 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7689 msg.rpc_argp = &calldata->arg;
7690 msg.rpc_resp = &calldata->res;
7691 task_setup_data.callback_data = calldata;
7692 task = rpc_run_task(&task_setup_data);
acf82b85 7693 if (IS_ERR(task)) {
fce5c838 7694 status = PTR_ERR(task);
acf82b85
DC		 7695 goto out;
7696 }
c34c32ea
AA		 7697 status = nfs4_wait_for_completion_rpc_task(task);
7698 if (status == 0)
7699 status = task->tk_status;
fce5c838 7700 rpc_put_task(task);
acf82b85 7701 return 0;
fce5c838
RL		 7702out:
7703 dprintk("<-- %s status=%d\n", __func__, status);
7704 return status;
7705}
b1f69b75
AA		 7706
7707static void
7708nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7709{
7710 struct nfs4_layoutget *lgp = calldata;
c31663d4 7711 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7712 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7713
7714 dprintk("--> %s\n", __func__);
c31663d4
FI		 7715 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7716 * right now covering the LAYOUTGET we are about to send.
7717 * However, that is not so catastrophic, and there seems
7718 * to be no way to prevent it completely.
7719 */
6ba7db34 7720 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7721 &lgp->res.seq_res, task))
b1f69b75 7722 return;
cf7d63f1
FI		 7723 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7724 NFS_I(lgp->args.inode)->layout,
ce6ab4f2 7725 &lgp->args.range,
cf7d63f1
FI		 7726 lgp->args.ctx->state)) {
7727 rpc_exit(task, NFS4_OK);
cf7d63f1 7728 }
b1f69b75
AA		 7729}
7730
7731static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7732{
7733 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7734 struct inode *inode = lgp->args.inode;
7735 struct nfs_server *server = NFS_SERVER(inode);
7736 struct pnfs_layout_hdr *lo;
7737 struct nfs4_state *state = NULL;
ed7e5423 7738 unsigned long timeo, now, giveup;
b1f69b75 7739
ed7e5423 7740 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7741
6ba7db34 7742 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7743 goto out;
b1f69b75
AA		 7744
7745 switch (task->tk_status) {
7746 case 0:
ee314c2a 7747 goto out;
ed7e5423
BH		 7748 /*
7749 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7750 * (or clients) writing to the same RAID stripe
7751 */
b1f69b75 7752 case -NFS4ERR_LAYOUTTRYLATER:
ed7e5423
BH		 7753 /*
7754 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7755 * existing layout before getting a new one).
7756 */
b1f69b75 7757 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7758 timeo = rpc_get_timeout(task->tk_client);
7759 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7760 now = jiffies;
7761 if (time_after(giveup, now)) {
7762 unsigned long delay;
7763
7764 /* Delay for:
7765 * - Not less then NFS4_POLL_RETRY_MIN.
7766 * - One last time a jiffie before we give up
7767 * - exponential backoff (time_now minus start_attempt)
7768 */
7769 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7770 min((giveup - now - 1),
7771 now - lgp->args.timestamp));
7772
7773 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7774 __func__, delay);
7775 rpc_delay(task, delay);
7776 task->tk_status = 0;
7777 rpc_restart_call_prepare(task);
7778 goto out; /* Do not call nfs4_async_handle_error() */
7779 }
ee314c2a
TM		 7780 break;
7781 case -NFS4ERR_EXPIRED:
7782 case -NFS4ERR_BAD_STATEID:
7783 spin_lock(&inode->i_lock);
7784 lo = NFS_I(inode)->layout;
7785 if (!lo || list_empty(&lo->plh_segs)) {
7786 spin_unlock(&inode->i_lock);
7787 /* If the open stateid was bad, then recover it. */
7788 state = lgp->args.ctx->state;
7789 } else {
7790 LIST_HEAD(head);
7791
defb8460
CH		 7792 /*
7793 * Mark the bad layout state as invalid, then retry
7794 * with the current stateid.
7795 */
ee314c2a
TM		 7796 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7797 spin_unlock(&inode->i_lock);
ee314c2a 7798 pnfs_free_lseg_list(&head);
defb8460
CH		 7799
7800 task->tk_status = 0;
7801 rpc_restart_call_prepare(task);
b1f69b75
AA		 7802 }
7803 }
8478eaa1 7804 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
ee314c2a
TM		 7805 rpc_restart_call_prepare(task);
7806out:
b1f69b75
AA		 7807 dprintk("<-- %s\n", __func__);
7808}
7809
8554116e
IK		 7810static size_t max_response_pages(struct nfs_server *server)
7811{
7812 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7813 return nfs_page_array_len(0, max_resp_sz);
7814}
7815
7816static void nfs4_free_pages(struct page **pages, size_t size)
7817{
7818 int i;
7819
7820 if (!pages)
7821 return;
7822
7823 for (i = 0; i < size; i++) {
7824 if (!pages[i])
7825 break;
7826 __free_page(pages[i]);
7827 }
7828 kfree(pages);
7829}
7830
7831static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7832{
7833 struct page **pages;
7834 int i;
7835
7836 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7837 if (!pages) {
7838 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7839 return NULL;
7840 }
7841
7842 for (i = 0; i < size; i++) {
7843 pages[i] = alloc_page(gfp_flags);
7844 if (!pages[i]) {
7845 dprintk("%s: failed to allocate page\n", __func__);
7846 nfs4_free_pages(pages, size);
7847 return NULL;
7848 }
7849 }
7850
7851 return pages;
7852}
7853
b1f69b75
AA		 7854static void nfs4_layoutget_release(void *calldata)
7855{
7856 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7857 struct inode *inode = lgp->args.inode;
7858 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7859 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7860
7861 dprintk("--> %s\n", __func__);
8554116e 7862 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7863 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7864 put_nfs_open_context(lgp->args.ctx);
7865 kfree(calldata);
7866 dprintk("<-- %s\n", __func__);
7867}
7868
7869static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7870 .rpc_call_prepare = nfs4_layoutget_prepare,
7871 .rpc_call_done = nfs4_layoutget_done,
7872 .rpc_release = nfs4_layoutget_release,
7873};
7874
a0b0a6e3
TM		 7875struct pnfs_layout_segment *
7876nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7877{
a47970ff
WAA		 7878 struct inode *inode = lgp->args.inode;
7879 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7880 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7881 struct rpc_task *task;
7882 struct rpc_message msg = {
7883 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7884 .rpc_argp = &lgp->args,
7885 .rpc_resp = &lgp->res,
6ab59344 7886 .rpc_cred = lgp->cred,
b1f69b75
AA		 7887 };
7888 struct rpc_task_setup task_setup_data = {
7889 .rpc_client = server->client,
7890 .rpc_message = &msg,
7891 .callback_ops = &nfs4_layoutget_call_ops,
7892 .callback_data = lgp,
7893 .flags = RPC_TASK_ASYNC,
7894 };
a0b0a6e3 7895 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7896 int status = 0;
7897
7898 dprintk("--> %s\n", __func__);
7899
4bd5a980
PT		 7900 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7901 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7902
8554116e
IK		 7903 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7904 if (!lgp->args.layout.pages) {
7905 nfs4_layoutget_release(lgp);
a0b0a6e3 7906 return ERR_PTR(-ENOMEM);
8554116e
IK		 7907 }
7908 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7909 lgp->args.timestamp = jiffies;
8554116e 7910
35124a09 7911 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7912 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7913 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 7914
b1f69b75
AA		 7915 task = rpc_run_task(&task_setup_data);
7916 if (IS_ERR(task))
a0b0a6e3 7917 return ERR_CAST(task);
b1f69b75 7918 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7919 if (status == 0)
7920 status = task->tk_status;
1037e6ea
TM		 7921 trace_nfs4_layoutget(lgp->args.ctx,
7922 &lgp->args.range,
7923 &lgp->res.range,
7924 status);
085b7a45
WAA		 7925 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7926 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7927 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7928 rpc_put_task(task);
7929 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7930 if (status)
7931 return ERR_PTR(status);
7932 return lseg;
b1f69b75
AA		 7933}
7934
cbe82603
BH		 7935static void
7936nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7937{
7938 struct nfs4_layoutreturn *lrp = calldata;
7939
7940 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7941 nfs41_setup_sequence(lrp->clp->cl_session,
7942 &lrp->args.seq_args,
7943 &lrp->res.seq_res,
7944 task);
cbe82603
BH		 7945}
7946
7947static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7948{
7949 struct nfs4_layoutreturn *lrp = calldata;
7950 struct nfs_server *server;
7951
7952 dprintk("--> %s\n", __func__);
7953
6ba7db34 7954 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7955 return;
7956
7957 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 7958 switch (task->tk_status) {
7959 default:
7960 task->tk_status = 0;
7961 case 0:
7962 break;
7963 case -NFS4ERR_DELAY:
8478eaa1 7964 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 7965 break;
d00c5d43 7966 rpc_restart_call_prepare(task);
cbe82603
BH		 7967 return;
7968 }
cbe82603
BH		 7969 dprintk("<-- %s\n", __func__);
7970}
7971
7972static void nfs4_layoutreturn_release(void *calldata)
7973{
7974 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7975 struct pnfs_layout_hdr *lo = lrp->args.layout;
c5d73716 7976 LIST_HEAD(freeme);
cbe82603
BH		 7977
7978 dprintk("--> %s\n", __func__);
849b286f
TM		 7979 spin_lock(&lo->plh_inode->i_lock);
7980 if (lrp->res.lrs_present)
7981 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
c5d73716 7982 pnfs_mark_matching_lsegs_invalid(lo, &freeme, &lrp->args.range);
d67ae825 7983 pnfs_clear_layoutreturn_waitbit(lo);
849b286f
TM		 7984 lo->plh_block_lgets--;
7985 spin_unlock(&lo->plh_inode->i_lock);
c5d73716 7986 pnfs_free_lseg_list(&freeme);
70c3bd2b 7987 pnfs_put_layout_hdr(lrp->args.layout);
5a0ec8ac 7988 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 7989 kfree(calldata);
7990 dprintk("<-- %s\n", __func__);
7991}
7992
7993static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7994 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7995 .rpc_call_done = nfs4_layoutreturn_done,
7996 .rpc_release = nfs4_layoutreturn_release,
7997};
7998
6c16605d 7999int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 8000{
8001 struct rpc_task *task;
8002 struct rpc_message msg = {
8003 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8004 .rpc_argp = &lrp->args,
8005 .rpc_resp = &lrp->res,
9556000d 8006 .rpc_cred = lrp->cred,
cbe82603
BH		 8007 };
8008 struct rpc_task_setup task_setup_data = {
1771c577 8009 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8010 .rpc_message = &msg,
8011 .callback_ops = &nfs4_layoutreturn_call_ops,
8012 .callback_data = lrp,
8013 };
6c16605d 8014 int status = 0;
cbe82603
BH		 8015
8016 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8017 if (!sync) {
8018 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8019 if (!lrp->inode) {
8020 nfs4_layoutreturn_release(lrp);
8021 return -EAGAIN;
8022 }
8023 task_setup_data.flags |= RPC_TASK_ASYNC;
8024 }
a9c92d6b 8025 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8026 task = rpc_run_task(&task_setup_data);
8027 if (IS_ERR(task))
8028 return PTR_ERR(task);
5a0ec8ac
TM		 8029 if (sync)
8030 status = task->tk_status;
1037e6ea 8031 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 8032 dprintk("<-- %s status=%d\n", __func__, status);
8033 rpc_put_task(task);
8034 return status;
8035}
8036
b1f69b75 8037static int
cd5875fe
TM		 8038_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8039 struct pnfs_device *pdev,
8040 struct rpc_cred *cred)
b1f69b75
AA		 8041{
8042 struct nfs4_getdeviceinfo_args args = {
8043 .pdev = pdev,
4e590803
TM		 8044 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8045 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8046 };
8047 struct nfs4_getdeviceinfo_res res = {
8048 .pdev = pdev,
8049 };
8050 struct rpc_message msg = {
8051 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8052 .rpc_argp = &args,
8053 .rpc_resp = &res,
cd5875fe 8054 .rpc_cred = cred,
b1f69b75
AA		 8055 };
8056 int status;
8057
8058 dprintk("--> %s\n", __func__);
7c513058 8059 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8060 if (res.notification & ~args.notify_types)
8061 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8062 if (res.notification != args.notify_types)
8063 pdev->nocache = 1;
4e590803 8064
b1f69b75
AA		 8065 dprintk("<-- %s status=%d\n", __func__, status);
8066
8067 return status;
8068}
8069
cd5875fe
TM		 8070int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8071 struct pnfs_device *pdev,
8072 struct rpc_cred *cred)
b1f69b75
AA		 8073{
8074 struct nfs4_exception exception = { };
8075 int err;
8076
8077 do {
8078 err = nfs4_handle_exception(server,
cd5875fe 8079 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8080 &exception);
8081 } while (exception.retry);
8082 return err;
8083}
8084EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8085
863a3c6c
AA		 8086static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8087{
8088 struct nfs4_layoutcommit_data *data = calldata;
8089 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 8090 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 8091
d9afbd1b
TM		 8092 nfs41_setup_sequence(session,
8093 &data->args.seq_args,
8094 &data->res.seq_res,
8095 task);
863a3c6c
AA		 8096}
8097
8098static void
8099nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8100{
8101 struct nfs4_layoutcommit_data *data = calldata;
8102 struct nfs_server *server = NFS_SERVER(data->args.inode);
8103
6ba7db34 8104 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8105 return;
8106
8107 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8108 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8109 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8110 case -NFS4ERR_BADLAYOUT: /* no layout */
8111 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8112 task->tk_status = 0;
e59d27e0 8113 case 0:
e59d27e0
TM		 8114 break;
8115 default:
8478eaa1 8116 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8117 rpc_restart_call_prepare(task);
8118 return;
8119 }
8120 }
863a3c6c
AA		 8121}
8122
8123static void nfs4_layoutcommit_release(void *calldata)
8124{
8125 struct nfs4_layoutcommit_data *data = calldata;
8126
db29c089 8127 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8128 nfs_post_op_update_inode_force_wcc(data->args.inode,
8129 data->res.fattr);
863a3c6c 8130 put_rpccred(data->cred);
472e2594 8131 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8132 kfree(data);
8133}
8134
8135static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8136 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8137 .rpc_call_done = nfs4_layoutcommit_done,
8138 .rpc_release = nfs4_layoutcommit_release,
8139};
8140
8141int
ef311537 8142nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8143{
8144 struct rpc_message msg = {
8145 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8146 .rpc_argp = &data->args,
8147 .rpc_resp = &data->res,
8148 .rpc_cred = data->cred,
8149 };
8150 struct rpc_task_setup task_setup_data = {
8151 .task = &data->task,
8152 .rpc_client = NFS_CLIENT(data->args.inode),
8153 .rpc_message = &msg,
8154 .callback_ops = &nfs4_layoutcommit_ops,
8155 .callback_data = data,
863a3c6c
AA		 8156 };
8157 struct rpc_task *task;
8158 int status = 0;
8159
b4839ebe
KM		 8160 dprintk("NFS: initiating layoutcommit call. sync %d "
8161 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8162 data->args.lastbytewritten,
8163 data->args.inode->i_ino);
8164
472e2594
TM		 8165 if (!sync) {
8166 data->inode = nfs_igrab_and_active(data->args.inode);
8167 if (data->inode == NULL) {
8168 nfs4_layoutcommit_release(data);
8169 return -EAGAIN;
8170 }
8171 task_setup_data.flags = RPC_TASK_ASYNC;
8172 }
a9c92d6b 8173 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8174 task = rpc_run_task(&task_setup_data);
8175 if (IS_ERR(task))
8176 return PTR_ERR(task);
472e2594
TM		 8177 if (sync)
8178 status = task->tk_status;
1037e6ea 8179 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 8180 dprintk("%s: status %d\n", __func__, status);
8181 rpc_put_task(task);
8182 return status;
8183}
fca78d6d 8184
97431204
AA		 8185/**
8186 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8187 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8188 */
fca78d6d
BS		 8189static int
8190_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8191 struct nfs_fsinfo *info,
8192 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8193{
8194 struct nfs41_secinfo_no_name_args args = {
8195 .style = SECINFO_STYLE_CURRENT_FH,
8196 };
8197 struct nfs4_secinfo_res res = {
8198 .flavors = flavors,
8199 };
8200 struct rpc_message msg = {
8201 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8202 .rpc_argp = &args,
8203 .rpc_resp = &res,
8204 };
b1b3e136 8205 struct rpc_clnt *clnt = server->client;
7cb852df 8206 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8207 int status;
8208
8209 if (use_integrity) {
8210 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8211 cred = nfs4_get_clid_cred(server->nfs_client);
8212 msg.rpc_cred = cred;
b1b3e136
WAA		 8213 }
8214
8215 dprintk("--> %s\n", __func__);
8216 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8217 &res.seq_res, 0);
8218 dprintk("<-- %s status=%d\n", __func__, status);
8219
7cb852df
WAA		 8220 if (cred)
8221 put_rpccred(cred);
b1b3e136
WAA		 8222
8223 return status;
fca78d6d
BS		 8224}
8225
8226static int
8227nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8228 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8229{
8230 struct nfs4_exception exception = { };
8231 int err;
8232 do {
b1b3e136
WAA		 8233 /* first try using integrity protection */
8234 err = -NFS4ERR_WRONGSEC;
8235
8236 /* try to use integrity protection with machine cred */
8237 if (_nfs4_is_integrity_protected(server->nfs_client))
8238 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8239 flavors, true);
8240
8241 /*
8242 * if unable to use integrity protection, or SECINFO with
8243 * integrity protection returns NFS4ERR_WRONGSEC (which is
8244 * disallowed by spec, but exists in deployed servers) use
8245 * the current filesystem's rpc_client and the user cred.
8246 */
8247 if (err == -NFS4ERR_WRONGSEC)
8248 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8249 flavors, false);
8250
fca78d6d
BS		 8251 switch (err) {
8252 case 0:
8253 case -NFS4ERR_WRONGSEC:
78b19bae 8254 case -ENOTSUPP:
05e9cfb4 8255 goto out;
fca78d6d
BS		 8256 default:
8257 err = nfs4_handle_exception(server, err, &exception);
8258 }
8259 } while (exception.retry);
05e9cfb4 8260out:
fca78d6d
BS		 8261 return err;
8262}
8263
8264static int
8265nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8266 struct nfs_fsinfo *info)
8267{
8268 int err;
8269 struct page *page;
367156d9 8270 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8271 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8272 struct nfs4_secinfo4 *secinfo;
8273 int i;
fca78d6d
BS		 8274
8275 page = alloc_page(GFP_KERNEL);
8276 if (!page) {
8277 err = -ENOMEM;
8278 goto out;
8279 }
8280
8281 flavors = page_address(page);
8282 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8283
8284 /*
8285 * Fall back on "guess and check" method if
8286 * the server doesn't support SECINFO_NO_NAME
8287 */
78b19bae 8288 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8289 err = nfs4_find_root_sec(server, fhandle, info);
8290 goto out_freepage;
8291 }
8292 if (err)
8293 goto out_freepage;
8294
58a8cf12
WAA		 8295 for (i = 0; i < flavors->num_flavors; i++) {
8296 secinfo = &flavors->flavors[i];
8297
8298 switch (secinfo->flavor) {
8299 case RPC_AUTH_NULL:
8300 case RPC_AUTH_UNIX:
8301 case RPC_AUTH_GSS:
8302 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8303 &secinfo->flavor_info);
8304 break;
8305 default:
8306 flavor = RPC_AUTH_MAXFLAVOR;
8307 break;
8308 }
8309
4d4b69dd
WAA		 8310 if (!nfs_auth_info_match(&server->auth_info, flavor))
8311 flavor = RPC_AUTH_MAXFLAVOR;
8312
58a8cf12
WAA		 8313 if (flavor != RPC_AUTH_MAXFLAVOR) {
8314 err = nfs4_lookup_root_sec(server, fhandle,
8315 info, flavor);
8316 if (!err)
8317 break;
8318 }
8319 }
8320
8321 if (flavor == RPC_AUTH_MAXFLAVOR)
8322 err = -EPERM;
fca78d6d
BS		 8323
8324out_freepage:
8325 put_page(page);
8326 if (err == -EACCES)
8327 return -EPERM;
8328out:
8329 return err;
8330}
1cab0652 8331
ab7cb0df
TM		 8332static int _nfs41_test_stateid(struct nfs_server *server,
8333 nfs4_stateid *stateid,
8334 struct rpc_cred *cred)
7d974794
BS		 8335{
8336 int status;
8337 struct nfs41_test_stateid_args args = {
1cab0652 8338 .stateid = stateid,
7d974794
BS		 8339 };
8340 struct nfs41_test_stateid_res res;
8341 struct rpc_message msg = {
8342 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8343 .rpc_argp = &args,
8344 .rpc_resp = &res,
ab7cb0df 8345 .rpc_cred = cred,
7d974794 8346 };
3787d506
WAA		 8347 struct rpc_clnt *rpc_client = server->client;
8348
8349 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8350 &rpc_client, &msg);
1cab0652 8351
38527b15 8352 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8353 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8354 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8355 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8356 &args.seq_args, &res.seq_res);
38527b15
CL		 8357 if (status != NFS_OK) {
8358 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8359 return status;
38527b15
CL		 8360 }
8361 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8362 return -res.status;
7d974794
BS		 8363}
8364
38527b15
CL		 8365/**
8366 * nfs41_test_stateid - perform a TEST_STATEID operation
8367 *
8368 * @server: server / transport on which to perform the operation
8369 * @stateid: state ID to test
ab7cb0df 8370 * @cred: credential
38527b15
CL		 8371 *
8372 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8373 * Otherwise a negative NFS4ERR value is returned if the operation
8374 * failed or the state ID is not currently valid.
8375 */
ab7cb0df
TM		 8376static int nfs41_test_stateid(struct nfs_server *server,
8377 nfs4_stateid *stateid,
8378 struct rpc_cred *cred)
7d974794
BS		 8379{
8380 struct nfs4_exception exception = { };
8381 int err;
8382 do {
ab7cb0df 8383 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8384 if (err != -NFS4ERR_DELAY)
8385 break;
8386 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8387 } while (exception.retry);
8388 return err;
8389}
9aeda35f 8390
7c1d5fae
TM		 8391struct nfs_free_stateid_data {
8392 struct nfs_server *server;
8393 struct nfs41_free_stateid_args args;
9aeda35f 8394 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8395};
8396
8397static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8398{
8399 struct nfs_free_stateid_data *data = calldata;
8400 nfs41_setup_sequence(nfs4_get_session(data->server),
8401 &data->args.seq_args,
8402 &data->res.seq_res,
8403 task);
8404}
8405
8406static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8407{
8408 struct nfs_free_stateid_data *data = calldata;
8409
8410 nfs41_sequence_done(task, &data->res.seq_res);
8411
8412 switch (task->tk_status) {
8413 case -NFS4ERR_DELAY:
8478eaa1 8414 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8415 rpc_restart_call_prepare(task);
8416 }
8417}
8418
8419static void nfs41_free_stateid_release(void *calldata)
8420{
8421 kfree(calldata);
8422}
8423
17f26b12 8424static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8425 .rpc_call_prepare = nfs41_free_stateid_prepare,
8426 .rpc_call_done = nfs41_free_stateid_done,
8427 .rpc_release = nfs41_free_stateid_release,
8428};
8429
8430static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8431 nfs4_stateid *stateid,
ab7cb0df 8432 struct rpc_cred *cred,
7c1d5fae
TM		 8433 bool privileged)
8434{
9aeda35f
BS		 8435 struct rpc_message msg = {
8436 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8437 .rpc_cred = cred,
9aeda35f 8438 };
7c1d5fae
TM		 8439 struct rpc_task_setup task_setup = {
8440 .rpc_client = server->client,
8441 .rpc_message = &msg,
8442 .callback_ops = &nfs41_free_stateid_ops,
8443 .flags = RPC_TASK_ASYNC,
8444 };
8445 struct nfs_free_stateid_data *data;
9aeda35f 8446
3787d506
WAA		 8447 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8448 &task_setup.rpc_client, &msg);
8449
38527b15 8450 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8451 data = kmalloc(sizeof(*data), GFP_NOFS);
8452 if (!data)
8453 return ERR_PTR(-ENOMEM);
8454 data->server = server;
8455 nfs4_stateid_copy(&data->args.stateid, stateid);
8456
8457 task_setup.callback_data = data;
8458
8459 msg.rpc_argp = &data->args;
8460 msg.rpc_resp = &data->res;
a9c92d6b 8461 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8462 if (privileged)
8463 nfs4_set_sequence_privileged(&data->args.seq_args);
8464
8465 return rpc_run_task(&task_setup);
9aeda35f
BS		 8466}
8467
38527b15
CL		 8468/**
8469 * nfs41_free_stateid - perform a FREE_STATEID operation
8470 *
8471 * @server: server / transport on which to perform the operation
8472 * @stateid: state ID to release
ab7cb0df 8473 * @cred: credential
38527b15
CL		 8474 *
8475 * Returns NFS_OK if the server freed "stateid". Otherwise a
8476 * negative NFS4ERR value is returned.
8477 */
ab7cb0df
TM		 8478static int nfs41_free_stateid(struct nfs_server *server,
8479 nfs4_stateid *stateid,
8480 struct rpc_cred *cred)
9aeda35f 8481{
7c1d5fae
TM		 8482 struct rpc_task *task;
8483 int ret;
8484
ab7cb0df 8485 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8486 if (IS_ERR(task))
8487 return PTR_ERR(task);
8488 ret = rpc_wait_for_completion_task(task);
8489 if (!ret)
8490 ret = task->tk_status;
8491 rpc_put_task(task);
8492 return ret;
9aeda35f 8493}
36281caa 8494
f1cdae87
JL		 8495static void
8496nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8497{
8498 struct rpc_task *task;
ab7cb0df 8499 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8500
ab7cb0df 8501 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8502 nfs4_free_lock_state(server, lsp);
8503 if (IS_ERR(task))
f1cdae87 8504 return;
c8b2d0bf 8505 rpc_put_task(task);
c8b2d0bf
TM		 8506}
8507
36281caa
TM		 8508static bool nfs41_match_stateid(const nfs4_stateid *s1,
8509 const nfs4_stateid *s2)
8510{
2d2f24ad 8511 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8512 return false;
8513
2d2f24ad 8514 if (s1->seqid == s2->seqid)
36281caa 8515 return true;
2d2f24ad 8516 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8517 return true;
8518
8519 return false;
8520}
8521
557134a3
AA		 8522#endif /* CONFIG_NFS_V4_1 */
8523
36281caa
TM		 8524static bool nfs4_match_stateid(const nfs4_stateid *s1,
8525 const nfs4_stateid *s2)
8526{
f597c537 8527 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8528}
8529
8530
17280175 8531static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8532 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8533 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8534 .recover_open = nfs4_open_reclaim,
8535 .recover_lock = nfs4_lock_reclaim,
591d71cb 8536 .establish_clid = nfs4_init_clientid,
05f4c350 8537 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8538};
8539
591d71cb 8540#if defined(CONFIG_NFS_V4_1)
17280175 8541static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8542 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8543 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8544 .recover_open = nfs4_open_reclaim,
8545 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8546 .establish_clid = nfs41_init_clientid,
fce5c838 8547 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8548 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8549};
8550#endif /* CONFIG_NFS_V4_1 */
8551
17280175 8552static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8553 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8554 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8555 .recover_open = nfs40_open_expired,
591d71cb
AA		 8556 .recover_lock = nfs4_lock_expired,
8557 .establish_clid = nfs4_init_clientid,
8558};
8559
8560#if defined(CONFIG_NFS_V4_1)
17280175 8561static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8562 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8563 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8564 .recover_open = nfs41_open_expired,
8565 .recover_lock = nfs41_lock_expired,
4d643d1d 8566 .establish_clid = nfs41_init_clientid,
1da177e4 8567};
591d71cb 8568#endif /* CONFIG_NFS_V4_1 */
1da177e4 8569
17280175 8570static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8571 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8572 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8573 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8574};
8575
8576#if defined(CONFIG_NFS_V4_1)
17280175 8577static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8578 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8579 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8580 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8581};
8582#endif
8583
ec011fe8 8584static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8585 .get_locations = _nfs40_proc_get_locations,
44c99933 8586 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8587};
8588
8589#if defined(CONFIG_NFS_V4_1)
8590static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8591 .get_locations = _nfs41_proc_get_locations,
44c99933 8592 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8593};
8594#endif /* CONFIG_NFS_V4_1 */
8595
97dc1359
TM		 8596static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8597 .minor_version = 0,
39c6daae
TM		 8598 .init_caps = NFS_CAP_READDIRPLUS
8599 | NFS_CAP_ATOMIC_OPEN
39c6daae 8600 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8601 .init_client = nfs40_init_client,
8602 .shutdown_client = nfs40_shutdown_client,
36281caa 8603 .match_stateid = nfs4_match_stateid,
fca78d6d 8604 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8605 .free_lock_state = nfs4_release_lockowner,
63f5f796 8606 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 8607 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8608 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8609 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8610 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8611 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8612};
8613
8614#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 8615static struct nfs_seqid *
8616nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8617{
8618 return NULL;
8619}
8620
97dc1359
TM		 8621static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8622 .minor_version = 1,
39c6daae
TM		 8623 .init_caps = NFS_CAP_READDIRPLUS
8624 | NFS_CAP_ATOMIC_OPEN
3b66486c 8625 | NFS_CAP_POSIX_LOCK
49f9a0fa 8626 | NFS_CAP_STATEID_NFSV41
e983120e 8627 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8628 .init_client = nfs41_init_client,
8629 .shutdown_client = nfs41_shutdown_client,
36281caa 8630 .match_stateid = nfs41_match_stateid,
fca78d6d 8631 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8632 .free_lock_state = nfs41_free_lock_state,
63f5f796 8633 .alloc_seqid = nfs_alloc_no_seqid,
9915ea7e 8634 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8635 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8636 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8637 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8638 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8639};
8640#endif
8641
42c2c424
SD		 8642#if defined(CONFIG_NFS_V4_2)
8643static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8644 .minor_version = 2,
7017310a
BS		 8645 .init_caps = NFS_CAP_READDIRPLUS
8646 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 8647 | NFS_CAP_POSIX_LOCK
8648 | NFS_CAP_STATEID_NFSV41
e983120e 8649 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 8650 | NFS_CAP_ALLOCATE
624bd5b7 8651 | NFS_CAP_DEALLOCATE
6c5a0d89
TM		 8652 | NFS_CAP_SEEK
8653 | NFS_CAP_LAYOUTSTATS,
abf79bb3
CL		 8654 .init_client = nfs41_init_client,
8655 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8656 .match_stateid = nfs41_match_stateid,
8657 .find_root_sec = nfs41_find_root_sec,
7017310a 8658 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8659 .call_sync_ops = &nfs41_call_sync_ops,
63f5f796 8660 .alloc_seqid = nfs_alloc_no_seqid,
42c2c424
SD		 8661 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8662 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8663 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 8664 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 8665};
8666#endif
8667
97dc1359
TM		 8668const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8669 [0] = &nfs_v4_0_minor_ops,
8670#if defined(CONFIG_NFS_V4_1)
8671 [1] = &nfs_v4_1_minor_ops,
8672#endif
42c2c424
SD		 8673#if defined(CONFIG_NFS_V4_2)
8674 [2] = &nfs_v4_2_minor_ops,
8675#endif
97dc1359
TM		 8676};
8677
17f26b12 8678static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8679 .create = nfs_create,
8680 .lookup = nfs_lookup,
8681 .atomic_open = nfs_atomic_open,
8682 .link = nfs_link,
8683 .unlink = nfs_unlink,
8684 .symlink = nfs_symlink,
8685 .mkdir = nfs_mkdir,
8686 .rmdir = nfs_rmdir,
8687 .mknod = nfs_mknod,
8688 .rename = nfs_rename,
8689 .permission = nfs_permission,
8690 .getattr = nfs_getattr,
8691 .setattr = nfs_setattr,
8692 .getxattr = generic_getxattr,
8693 .setxattr = generic_setxattr,
8694 .listxattr = generic_listxattr,
8695 .removexattr = generic_removexattr,
8696};
8697
92e1d5be 8698static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8699 .permission = nfs_permission,
8700 .getattr = nfs_getattr,
8701 .setattr = nfs_setattr,
64c2ce8b
AK		 8702 .getxattr = generic_getxattr,
8703 .setxattr = generic_setxattr,
8704 .listxattr = generic_listxattr,
8705 .removexattr = generic_removexattr,
6b3b5496
BF		 8706};
8707
509de811 8708const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8709 .version = 4, /* protocol version */
8710 .dentry_ops = &nfs4_dentry_operations,
8711 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8712 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8713 .file_ops = &nfs4_file_operations,
1da177e4 8714 .getroot = nfs4_proc_get_root,
281cad46 8715 .submount = nfs4_submount,
ff9099f2 8716 .try_mount = nfs4_try_mount,
1da177e4
LT		 8717 .getattr = nfs4_proc_getattr,
8718 .setattr = nfs4_proc_setattr,
8719 .lookup = nfs4_proc_lookup,
8720 .access = nfs4_proc_access,
8721 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8722 .create = nfs4_proc_create,
8723 .remove = nfs4_proc_remove,
8724 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8725 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8726 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8727 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8728 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8729 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8730 .link = nfs4_proc_link,
8731 .symlink = nfs4_proc_symlink,
8732 .mkdir = nfs4_proc_mkdir,
8733 .rmdir = nfs4_proc_remove,
8734 .readdir = nfs4_proc_readdir,
8735 .mknod = nfs4_proc_mknod,
8736 .statfs = nfs4_proc_statfs,
8737 .fsinfo = nfs4_proc_fsinfo,
8738 .pathconf = nfs4_proc_pathconf,
e9326dca 8739 .set_capabilities = nfs4_server_capabilities,
1da177e4 8740 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8741 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8742 .read_setup = nfs4_proc_read_setup,
ec06c096 8743 .read_done = nfs4_read_done,
1da177e4 8744 .write_setup = nfs4_proc_write_setup,
788e7a89 8745 .write_done = nfs4_write_done,
1da177e4 8746 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8747 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8748 .commit_done = nfs4_commit_done,
1da177e4 8749 .lock = nfs4_proc_lock,
e50a1c2e 8750 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8751 .close_context = nfs4_close_context,
2b484297 8752 .open_context = nfs4_atomic_open,
011e2a7f 8753 .have_delegation = nfs4_have_delegation,
57ec14c5 8754 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8755 .alloc_client = nfs4_alloc_client,
45a52a02 8756 .init_client = nfs4_init_client,
cdb7eced 8757 .free_client = nfs4_free_client,
1179acc6
BS		 8758 .create_server = nfs4_create_server,
8759 .clone_server = nfs_clone_server,
1da177e4
LT		 8760};
8761
64c2ce8b
AK		 8762static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8763 .prefix = XATTR_NAME_NFSV4_ACL,
8764 .list = nfs4_xattr_list_nfs4_acl,
8765 .get = nfs4_xattr_get_nfs4_acl,
8766 .set = nfs4_xattr_set_nfs4_acl,
8767};
8768
8769const struct xattr_handler *nfs4_xattr_handlers[] = {
8770 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8771#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8772 &nfs4_xattr_nfs4_label_handler,
8773#endif
64c2ce8b
AK		 8774 NULL
8775};
8776
1da177e4
LT		 8777/*
8778 * Local variables:
8779 * c-basic-offset: 8
8780 * End:
8781 */
Linux 6.x block layer and io_uring tree(s)