projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
NFS: Get suppattr_exclcreat when getting server capabilities
[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
2a606188
TM		 1153static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode,
1154 enum open_claim_type4 claim)
aac00a8d 1155{
652f89f6
TM		 1156 if (delegation == NULL)
1157 return 0;
dc0b027d 1158 if ((delegation->type & fmode) != fmode)
aac00a8d 1159 return 0;
d25be546
TM		 1160 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1161 return 0;
2a606188
TM		 1162 switch (claim) {
1163 case NFS4_OPEN_CLAIM_NULL:
1164 case NFS4_OPEN_CLAIM_FH:
1165 break;
1166 case NFS4_OPEN_CLAIM_PREVIOUS:
1167 if (!test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags))
1168 break;
1169 default:
1170 return 0;
1171 }
b7391f44 1172 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1173 return 1;
1174}
1175
dc0b027d 1176static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1177{
dc0b027d 1178 switch (fmode) {
e7616923
TM		 1179 case FMODE_WRITE:
1180 state->n_wronly++;
1181 break;
1182 case FMODE_READ:
1183 state->n_rdonly++;
1184 break;
1185 case FMODE_READ|FMODE_WRITE:
1186 state->n_rdwr++;
1187 }
dc0b027d 1188 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1189}
1190
4f14c194
TM		 1191static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1192{
1193 struct nfs_client *clp = state->owner->so_server->nfs_client;
1194 bool need_recover = false;
1195
1196 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1197 need_recover = true;
1198 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1199 need_recover = true;
1200 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1201 need_recover = true;
1202 if (need_recover)
1203 nfs4_state_mark_reclaim_nograce(clp, state);
1204}
1205
e999e80e
TM		 1206static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1207 nfs4_stateid *stateid)
1208{
1209 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1210 return true;
4f14c194
TM		 1211 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1212 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1213 return true;
4f14c194 1214 }
e999e80e
TM		 1215 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1216 return true;
1217 return false;
1218}
1219
f95549cf
TM		 1220static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1221{
3c38cbe2
TM		 1222 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1223 return;
f95549cf
TM		 1224 if (state->n_wronly)
1225 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1226 if (state->n_rdonly)
1227 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1228 if (state->n_rdwr)
1229 set_bit(NFS_O_RDWR_STATE, &state->flags);
3c38cbe2 1230 set_bit(NFS_OPEN_STATE, &state->flags);
f95549cf
TM		 1231}
1232
226056c5
TM		 1233static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1234 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1235{
226056c5
TM		 1236 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1237 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1238 case FMODE_WRITE:
1239 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1240 break;
1241 case FMODE_READ:
1242 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1243 break;
1244 case 0:
1245 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1246 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1247 clear_bit(NFS_OPEN_STATE, &state->flags);
1248 }
1249 if (stateid == NULL)
1250 return;
f95549cf
TM		 1251 /* Handle races with OPEN */
1252 if (!nfs4_stateid_match_other(stateid, &state->open_stateid) ||
1253 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1254 nfs_resync_open_stateid_locked(state);
226056c5 1255 return;
f95549cf 1256 }
003707c7 1257 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1258 nfs4_stateid_copy(&state->stateid, stateid);
1259 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1260}
1261
1262static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1263{
1264 write_seqlock(&state->seqlock);
1265 nfs_clear_open_stateid_locked(state, stateid, fmode);
1266 write_sequnlock(&state->seqlock);
4f14c194
TM		 1267 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1268 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1269}
1270
dc0b027d 1271static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1272{
dc0b027d 1273 switch (fmode) {
003707c7
TM		 1274 case FMODE_READ:
1275 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1276 break;
1277 case FMODE_WRITE:
1278 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1279 break;
1280 case FMODE_READ|FMODE_WRITE:
1281 set_bit(NFS_O_RDWR_STATE, &state->flags);
1282 }
e999e80e
TM		 1283 if (!nfs_need_update_open_stateid(state, stateid))
1284 return;
1285 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1286 nfs4_stateid_copy(&state->stateid, stateid);
1287 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1288}
1289
dc0b027d 1290static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1291{
8bda4e4c
TM		 1292 /*
1293 * Protect the call to nfs4_state_set_mode_locked and
1294 * serialise the stateid update
1295 */
1296 write_seqlock(&state->seqlock);
003707c7 1297 if (deleg_stateid != NULL) {
f597c537 1298 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1299 set_bit(NFS_DELEGATED_STATE, &state->flags);
1300 }
1301 if (open_stateid != NULL)
dc0b027d 1302 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1303 write_sequnlock(&state->seqlock);
1304 spin_lock(&state->owner->so_lock);
dc0b027d 1305 update_open_stateflags(state, fmode);
ec073428 1306 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1307}
1308
dc0b027d 1309static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1310{
1311 struct nfs_inode *nfsi = NFS_I(state->inode);
1312 struct nfs_delegation *deleg_cur;
1313 int ret = 0;
1314
dc0b027d 1315 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1316
1317 rcu_read_lock();
1318 deleg_cur = rcu_dereference(nfsi->delegation);
1319 if (deleg_cur == NULL)
1320 goto no_delegation;
1321
1322 spin_lock(&deleg_cur->lock);
17f26b12 1323 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1324 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1325 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1326 goto no_delegation_unlock;
1327
1328 if (delegation == NULL)
1329 delegation = &deleg_cur->stateid;
f597c537 1330 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1331 goto no_delegation_unlock;
1332
b7391f44 1333 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1334 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1335 ret = 1;
1336no_delegation_unlock:
1337 spin_unlock(&deleg_cur->lock);
1338no_delegation:
1339 rcu_read_unlock();
1340
1341 if (!ret && open_stateid != NULL) {
dc0b027d 1342 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1343 ret = 1;
1344 }
4f14c194
TM		 1345 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1346 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1347
1348 return ret;
1349}
1350
39071e6f
TM		 1351static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1352 const nfs4_stateid *stateid)
1353{
1354 struct nfs4_state *state = lsp->ls_state;
1355 bool ret = false;
1356
1357 spin_lock(&state->state_lock);
1358 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1359 goto out_noupdate;
1360 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1361 goto out_noupdate;
1362 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1363 ret = true;
1364out_noupdate:
1365 spin_unlock(&state->state_lock);
1366 return ret;
1367}
34310430 1368
dc0b027d 1369static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1370{
1371 struct nfs_delegation *delegation;
1372
1373 rcu_read_lock();
1374 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1375 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1376 rcu_read_unlock();
1377 return;
1378 }
1379 rcu_read_unlock();
57ec14c5 1380 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1381}
1382
6ee41268 1383static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1384{
1385 struct nfs4_state *state = opendata->state;
1386 struct nfs_inode *nfsi = NFS_I(state->inode);
1387 struct nfs_delegation *delegation;
f448badd 1388 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1389 fmode_t fmode = opendata->o_arg.fmode;
2a606188 1390 enum open_claim_type4 claim = opendata->o_arg.claim;
aac00a8d
TM		 1391 nfs4_stateid stateid;
1392 int ret = -EAGAIN;
1393
aac00a8d 1394 for (;;) {
61beef75 1395 spin_lock(&state->owner->so_lock);
dc0b027d 1396 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1397 update_open_stateflags(state, fmode);
6ee41268 1398 spin_unlock(&state->owner->so_lock);
61beef75 1399 goto out_return_state;
6ee41268 1400 }
61beef75 1401 spin_unlock(&state->owner->so_lock);
34310430
TM		 1402 rcu_read_lock();
1403 delegation = rcu_dereference(nfsi->delegation);
2a606188 1404 if (!can_open_delegated(delegation, fmode, claim)) {
34310430 1405 rcu_read_unlock();
aac00a8d 1406 break;
34310430 1407 }
aac00a8d 1408 /* Save the delegation */
f597c537 1409 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1410 rcu_read_unlock();
fa332941 1411 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1412 if (!opendata->is_recover) {
1413 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1414 if (ret != 0)
1415 goto out;
1416 }
aac00a8d 1417 ret = -EAGAIN;
34310430
TM		 1418
1419 /* Try to update the stateid using the delegation */
dc0b027d 1420 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1421 goto out_return_state;
aac00a8d 1422 }
aac00a8d
TM		 1423out:
1424 return ERR_PTR(ret);
1425out_return_state:
1426 atomic_inc(&state->count);
1427 return state;
1428}
1429
e23008ec
AA		 1430static void
1431nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1432{
1433 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1434 struct nfs_delegation *delegation;
1435 int delegation_flags = 0;
1436
1437 rcu_read_lock();
1438 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1439 if (delegation)
1440 delegation_flags = delegation->flags;
1441 rcu_read_unlock();
1442 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1443 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1444 "returning a delegation for "
1445 "OPEN(CLAIM_DELEGATE_CUR)\n",
1446 clp->cl_hostname);
1447 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1448 nfs_inode_set_delegation(state->inode,
1449 data->owner->so_cred,
1450 &data->o_res);
1451 else
1452 nfs_inode_reclaim_delegation(state->inode,
1453 data->owner->so_cred,
1454 &data->o_res);
1455}
1456
1457/*
1458 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1459 * and update the nfs4_state.
1460 */
1461static struct nfs4_state *
1462_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1463{
1464 struct inode *inode = data->state->inode;
1465 struct nfs4_state *state = data->state;
1466 int ret;
1467
d2bfda2e
WAA		 1468 if (!data->rpc_done) {
1469 if (data->rpc_status) {
1470 ret = data->rpc_status;
1471 goto err;
1472 }
1473 /* cached opens have already been processed */
1474 goto update;
e23008ec
AA		 1475 }
1476
e23008ec
AA		 1477 ret = nfs_refresh_inode(inode, &data->f_attr);
1478 if (ret)
1479 goto err;
1480
1481 if (data->o_res.delegation_type != 0)
1482 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1483update:
e23008ec
AA		 1484 update_open_stateid(state, &data->o_res.stateid, NULL,
1485 data->o_arg.fmode);
d49f042a 1486 atomic_inc(&state->count);
e23008ec
AA		 1487
1488 return state;
1489err:
1490 return ERR_PTR(ret);
1491
1492}
1493
1494static struct nfs4_state *
1495_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1496{
1497 struct inode *inode;
1498 struct nfs4_state *state = NULL;
1b370bc2 1499 int ret;
24ac23ab 1500
aac00a8d 1501 if (!data->rpc_done) {
6ee41268 1502 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1503 goto out;
1504 }
1505
1b370bc2 1506 ret = -EAGAIN;
24ac23ab 1507 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1508 goto err;
1775fd3e 1509 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1510 ret = PTR_ERR(inode);
03f28e3a 1511 if (IS_ERR(inode))
1b370bc2
TM		 1512 goto err;
1513 ret = -ENOMEM;
24ac23ab
TM		 1514 state = nfs4_get_open_state(inode, data->owner);
1515 if (state == NULL)
1b370bc2 1516 goto err_put_inode;
e23008ec
AA		 1517 if (data->o_res.delegation_type != 0)
1518 nfs4_opendata_check_deleg(data, state);
34310430 1519 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1520 data->o_arg.fmode);
24ac23ab 1521 iput(inode);
aac00a8d 1522out:
7aa262b5 1523 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1524 return state;
1b370bc2
TM		 1525err_put_inode:
1526 iput(inode);
1527err:
1528 return ERR_PTR(ret);
24ac23ab
TM		 1529}
1530
e23008ec
AA		 1531static struct nfs4_state *
1532nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1533{
1534 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1535 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1536 return _nfs4_opendata_to_nfs4_state(data);
1537}
1538
864472e9
TM		 1539static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1540{
1541 struct nfs_inode *nfsi = NFS_I(state->inode);
1542 struct nfs_open_context *ctx;
1543
1544 spin_lock(&state->inode->i_lock);
1545 list_for_each_entry(ctx, &nfsi->open_files, list) {
1546 if (ctx->state != state)
1547 continue;
1548 get_nfs_open_context(ctx);
1549 spin_unlock(&state->inode->i_lock);
1550 return ctx;
1551 }
1552 spin_unlock(&state->inode->i_lock);
1553 return ERR_PTR(-ENOENT);
1554}
1555
4a1c0893
TM		 1556static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1557 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1558{
1559 struct nfs4_opendata *opendata;
1560
4a1c0893 1561 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1562 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1563 if (opendata == NULL)
1564 return ERR_PTR(-ENOMEM);
1565 opendata->state = state;
1566 atomic_inc(&state->count);
1567 return opendata;
1568}
1569
dc0b027d 1570static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1571{
2ced46c2 1572 struct nfs4_state *newstate;
864472e9
TM		 1573 int ret;
1574
39f897fd
N		 1575 if ((opendata->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR ||
1576 opendata->o_arg.claim == NFS4_OPEN_CLAIM_DELEG_CUR_FH) &&
1577 (opendata->o_arg.u.delegation_type & fmode) != fmode)
1578 /* This mode can't have been delegated, so we must have
1579 * a valid open_stateid to cover it - not need to reclaim.
1580 */
1581 return 0;
dc0b027d
TM		 1582 opendata->o_arg.open_flags = 0;
1583 opendata->o_arg.fmode = fmode;
be36e185
TM		 1584 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1585 NFS_SB(opendata->dentry->d_sb),
1586 fmode, 0);
2ced46c2
TM		 1587 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1588 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1589 nfs4_init_opendata_res(opendata);
b257957e 1590 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1591 if (ret != 0)
1592 return ret;
2ced46c2 1593 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1594 if (IS_ERR(newstate))
1595 return PTR_ERR(newstate);
643168c2 1596 nfs4_close_state(newstate, fmode);
2ced46c2 1597 *res = newstate;
864472e9
TM		 1598 return 0;
1599}
1600
1601static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1602{
864472e9 1603 struct nfs4_state *newstate;
864472e9
TM		 1604 int ret;
1605
4f14c194
TM		 1606 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1607 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1608 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1609 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1610 /* memory barrier prior to reading state->n_* */
2ced46c2 1611 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1612 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1613 smp_rmb();
1614 if (state->n_rdwr != 0) {
2ced46c2 1615 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1616 if (ret != 0)
1617 return ret;
2ced46c2
TM		 1618 if (newstate != state)
1619 return -ESTALE;
864472e9
TM		 1620 }
1621 if (state->n_wronly != 0) {
2ced46c2 1622 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1623 if (ret != 0)
1624 return ret;
2ced46c2
TM		 1625 if (newstate != state)
1626 return -ESTALE;
864472e9
TM		 1627 }
1628 if (state->n_rdonly != 0) {
2ced46c2 1629 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1630 if (ret != 0)
1631 return ret;
2ced46c2
TM		 1632 if (newstate != state)
1633 return -ESTALE;
864472e9 1634 }
1ac7e2fd
TM		 1635 /*
1636 * We may have performed cached opens for all three recoveries.
1637 * Check if we need to update the current stateid.
1638 */
1639 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1640 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1641 write_seqlock(&state->seqlock);
1ac7e2fd 1642 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1643 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1644 write_sequnlock(&state->seqlock);
1ac7e2fd 1645 }
864472e9
TM		 1646 return 0;
1647}
1648
1da177e4
LT		 1649/*
1650 * OPEN_RECLAIM:
1651 * reclaim state on the server after a reboot.
1da177e4 1652 */
539cd03a 1653static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1654{
1ac7e2fd 1655 struct nfs_delegation *delegation;
864472e9 1656 struct nfs4_opendata *opendata;
dc0b027d 1657 fmode_t delegation_type = 0;
1da177e4
LT		 1658 int status;
1659
4a1c0893
TM		 1660 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1661 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1662 if (IS_ERR(opendata))
1663 return PTR_ERR(opendata);
1ac7e2fd
TM		 1664 rcu_read_lock();
1665 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1666 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1667 delegation_type = delegation->type;
1ac7e2fd 1668 rcu_read_unlock();
864472e9
TM		 1669 opendata->o_arg.u.delegation_type = delegation_type;
1670 status = nfs4_open_recover(opendata, state);
c6d00e63 1671 nfs4_opendata_put(opendata);
1da177e4
LT		 1672 return status;
1673}
1674
539cd03a 1675static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1676{
1677 struct nfs_server *server = NFS_SERVER(state->inode);
1678 struct nfs4_exception exception = { };
1679 int err;
1680 do {
539cd03a 1681 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1682 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1683 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1684 continue;
168667c4 1685 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1686 break;
1687 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1688 } while (exception.retry);
1689 return err;
1690}
1691
864472e9
TM		 1692static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1693{
1694 struct nfs_open_context *ctx;
1695 int ret;
1696
1697 ctx = nfs4_state_find_open_context(state);
1698 if (IS_ERR(ctx))
91876b13 1699 return -EAGAIN;
539cd03a 1700 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1701 put_nfs_open_context(ctx);
1702 return ret;
1703}
1704
db4f2e63 1705static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1706{
be76b5b6
TM		 1707 switch (err) {
1708 default:
1709 printk(KERN_ERR "NFS: %s: unhandled error "
1710 "%d.\n", __func__, err);
1711 case 0:
1712 case -ENOENT:
8eee52af 1713 case -EAGAIN:
be76b5b6
TM		 1714 case -ESTALE:
1715 break;
1716 case -NFS4ERR_BADSESSION:
1717 case -NFS4ERR_BADSLOT:
1718 case -NFS4ERR_BAD_HIGH_SLOT:
1719 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1720 case -NFS4ERR_DEADSESSION:
1721 set_bit(NFS_DELEGATED_STATE, &state->flags);
1722 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1723 return -EAGAIN;
1724 case -NFS4ERR_STALE_CLIENTID:
1725 case -NFS4ERR_STALE_STATEID:
1726 set_bit(NFS_DELEGATED_STATE, &state->flags);
1727 case -NFS4ERR_EXPIRED:
1728 /* Don't recall a delegation if it was lost */
1729 nfs4_schedule_lease_recovery(server->nfs_client);
1730 return -EAGAIN;
352297b9
CL		 1731 case -NFS4ERR_MOVED:
1732 nfs4_schedule_migration_recovery(server);
1733 return -EAGAIN;
8ef2f8d4
CL		 1734 case -NFS4ERR_LEASE_MOVED:
1735 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1736 return -EAGAIN;
be76b5b6
TM		 1737 case -NFS4ERR_DELEG_REVOKED:
1738 case -NFS4ERR_ADMIN_REVOKED:
1739 case -NFS4ERR_BAD_STATEID:
db4f2e63 1740 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1741 nfs_inode_find_state_and_recover(state->inode,
1742 stateid);
1743 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1744 return -EAGAIN;
be76b5b6
TM		 1745 case -NFS4ERR_DELAY:
1746 case -NFS4ERR_GRACE:
1747 set_bit(NFS_DELEGATED_STATE, &state->flags);
1748 ssleep(1);
1749 return -EAGAIN;
db4f2e63
TM		 1750 case -ENOMEM:
1751 case -NFS4ERR_DENIED:
1752 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1753 return 0;
be76b5b6 1754 }
1da177e4
LT		 1755 return err;
1756}
1757
db4f2e63
TM		 1758int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1759{
1760 struct nfs_server *server = NFS_SERVER(state->inode);
1761 struct nfs4_opendata *opendata;
1762 int err;
1763
1764 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1765 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1766 if (IS_ERR(opendata))
1767 return PTR_ERR(opendata);
1768 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1769 err = nfs4_open_recover(opendata, state);
1770 nfs4_opendata_put(opendata);
1771 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1772}
1773
be05c860
CL		 1774static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1775{
1776 struct nfs4_opendata *data = calldata;
1777
cb04ad2a
PT		 1778 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1779 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 1780}
1781
cdd4e68b
TM		 1782static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1783{
1784 struct nfs4_opendata *data = calldata;
1785
17ead6c8 1786 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1787
cdd4e68b 1788 data->rpc_status = task->tk_status;
26e976a8 1789 if (data->rpc_status == 0) {
f597c537 1790 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1791 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1792 renew_lease(data->o_res.server, data->timestamp);
3e309914 1793 data->rpc_done = 1;
26e976a8 1794 }
cdd4e68b
TM		 1795}
1796
1797static void nfs4_open_confirm_release(void *calldata)
1798{
1799 struct nfs4_opendata *data = calldata;
1800 struct nfs4_state *state = NULL;
1801
1802 /* If this request hasn't been cancelled, do nothing */
1803 if (data->cancelled == 0)
1804 goto out_free;
1805 /* In case of error, no cleanup! */
3e309914 1806 if (!data->rpc_done)
cdd4e68b 1807 goto out_free;
cdd4e68b 1808 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1809 if (!IS_ERR(state))
643168c2 1810 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1811out_free:
c6d00e63 1812 nfs4_opendata_put(data);
cdd4e68b
TM		 1813}
1814
1815static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1816 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1817 .rpc_call_done = nfs4_open_confirm_done,
1818 .rpc_release = nfs4_open_confirm_release,
1819};
1820
1821/*
1822 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1823 */
1824static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1825{
2b0143b5 1826 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 1827 struct rpc_task *task;
5138fde0
TM		 1828 struct rpc_message msg = {
1829 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1830 .rpc_argp = &data->c_arg,
1831 .rpc_resp = &data->c_res,
1832 .rpc_cred = data->owner->so_cred,
1833 };
c970aa85
TM		 1834 struct rpc_task_setup task_setup_data = {
1835 .rpc_client = server->client,
5138fde0 1836 .rpc_message = &msg,
c970aa85
TM		 1837 .callback_ops = &nfs4_open_confirm_ops,
1838 .callback_data = data,
101070ca 1839 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1840 .flags = RPC_TASK_ASYNC,
1841 };
1da177e4
LT		 1842 int status;
1843
17ead6c8 1844 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1845 kref_get(&data->kref);
3e309914
TM		 1846 data->rpc_done = 0;
1847 data->rpc_status = 0;
5138fde0 1848 data->timestamp = jiffies;
c970aa85 1849 task = rpc_run_task(&task_setup_data);
7a1218a2 1850 if (IS_ERR(task))
cdd4e68b 1851 return PTR_ERR(task);
cdd4e68b
TM		 1852 status = nfs4_wait_for_completion_rpc_task(task);
1853 if (status != 0) {
1854 data->cancelled = 1;
1855 smp_wmb();
1856 } else
1857 status = data->rpc_status;
e6b3c4db 1858 rpc_put_task(task);
1da177e4
LT		 1859 return status;
1860}
1861
24ac23ab 1862static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1863{
24ac23ab
TM		 1864 struct nfs4_opendata *data = calldata;
1865 struct nfs4_state_owner *sp = data->owner;
549b19cc 1866 struct nfs_client *clp = sp->so_server->nfs_client;
2a606188 1867 enum open_claim_type4 claim = data->o_arg.claim;
5138fde0 1868
24ac23ab 1869 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1870 goto out_wait;
aac00a8d
TM		 1871 /*
1872 * Check if we still need to send an OPEN call, or if we can use
1873 * a delegation instead.
1874 */
1875 if (data->state != NULL) {
1876 struct nfs_delegation *delegation;
1877
dc0b027d 1878 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1879 goto out_no_action;
aac00a8d
TM		 1880 rcu_read_lock();
1881 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
2a606188 1882 if (can_open_delegated(delegation, data->o_arg.fmode, claim))
652f89f6 1883 goto unlock_no_action;
aac00a8d
TM		 1884 rcu_read_unlock();
1885 }
95b72eb0 1886 /* Update client id. */
549b19cc 1887 data->o_arg.clientid = clp->cl_clientid;
2a606188
TM		 1888 switch (claim) {
1889 default:
1890 break;
8188df17
TM		 1891 case NFS4_OPEN_CLAIM_PREVIOUS:
1892 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1893 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1894 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1895 case NFS4_OPEN_CLAIM_FH:
1896 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1897 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1898 }
26e976a8 1899 data->timestamp = jiffies;
035168ab 1900 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1901 &data->o_arg.seq_args,
2240a9e2
TM		 1902 &data->o_res.seq_res,
1903 task) != 0)
1904 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1905
1906 /* Set the create mode (note dependency on the session type) */
1907 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1908 if (data->o_arg.open_flags & O_EXCL) {
1909 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1910 if (nfs4_has_persistent_session(clp))
1911 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1912 else if (clp->cl_mvops->minor_version > 0)
1913 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1914 }
6ee41268 1915 return;
652f89f6
TM		 1916unlock_no_action:
1917 rcu_read_unlock();
6ee41268
TM		 1918out_no_action:
1919 task->tk_action = NULL;
c8da19b9 1920out_wait:
b75ad4cd 1921 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1922}
1923
24ac23ab
TM		 1924static void nfs4_open_done(struct rpc_task *task, void *calldata)
1925{
1926 struct nfs4_opendata *data = calldata;
1da177e4 1927
24ac23ab 1928 data->rpc_status = task->tk_status;
d898528c 1929
14516c3a
TM		 1930 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1931 return;
d898528c 1932
24ac23ab 1933 if (task->tk_status == 0) {
807d66d8
TM		 1934 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1935 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1936 case S_IFREG:
1937 break;
1938 case S_IFLNK:
24ac23ab 1939 data->rpc_status = -ELOOP;
6f926b5b
TM		 1940 break;
1941 case S_IFDIR:
24ac23ab 1942 data->rpc_status = -EISDIR;
6f926b5b
TM		 1943 break;
1944 default:
24ac23ab 1945 data->rpc_status = -ENOTDIR;
807d66d8 1946 }
6f926b5b 1947 }
26e976a8 1948 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1949 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1950 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1951 }
3e309914 1952 data->rpc_done = 1;
24ac23ab 1953}
6f926b5b 1954
24ac23ab
TM		 1955static void nfs4_open_release(void *calldata)
1956{
1957 struct nfs4_opendata *data = calldata;
1958 struct nfs4_state *state = NULL;
1959
1960 /* If this request hasn't been cancelled, do nothing */
1961 if (data->cancelled == 0)
1962 goto out_free;
1963 /* In case of error, no cleanup! */
3e309914 1964 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1965 goto out_free;
1966 /* In case we need an open_confirm, no cleanup! */
1967 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1968 goto out_free;
24ac23ab 1969 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1970 if (!IS_ERR(state))
643168c2 1971 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1972out_free:
c6d00e63 1973 nfs4_opendata_put(data);
24ac23ab
TM		 1974}
1975
1976static const struct rpc_call_ops nfs4_open_ops = {
1977 .rpc_call_prepare = nfs4_open_prepare,
1978 .rpc_call_done = nfs4_open_done,
1979 .rpc_release = nfs4_open_release,
1980};
1981
b257957e 1982static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab 1983{
2b0143b5 1984 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 1985 struct nfs_server *server = NFS_SERVER(dir);
1986 struct nfs_openargs *o_arg = &data->o_arg;
1987 struct nfs_openres *o_res = &data->o_res;
1988 struct rpc_task *task;
5138fde0
TM		 1989 struct rpc_message msg = {
1990 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1991 .rpc_argp = o_arg,
1992 .rpc_resp = o_res,
1993 .rpc_cred = data->owner->so_cred,
1994 };
c970aa85
TM		 1995 struct rpc_task_setup task_setup_data = {
1996 .rpc_client = server->client,
5138fde0 1997 .rpc_message = &msg,
c970aa85
TM		 1998 .callback_ops = &nfs4_open_ops,
1999 .callback_data = data,
101070ca 2000 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2001 .flags = RPC_TASK_ASYNC,
2002 };
24ac23ab
TM		 2003 int status;
2004
a9c92d6b 2005 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 2006 kref_get(&data->kref);
3e309914
TM		 2007 data->rpc_done = 0;
2008 data->rpc_status = 0;
2ced46c2 2009 data->cancelled = 0;
bdeca1b7
TM		 2010 data->is_recover = 0;
2011 if (isrecover) {
8fe72bac 2012 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 2013 data->is_recover = 1;
2014 }
c970aa85 2015 task = rpc_run_task(&task_setup_data);
b257957e
AB		 2016 if (IS_ERR(task))
2017 return PTR_ERR(task);
2018 status = nfs4_wait_for_completion_rpc_task(task);
2019 if (status != 0) {
2020 data->cancelled = 1;
2021 smp_wmb();
2022 } else
2023 status = data->rpc_status;
2024 rpc_put_task(task);
2025
2026 return status;
2027}
2028
2029static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2030{
2b0143b5 2031 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2032 struct nfs_openres *o_res = &data->o_res;
2033 int status;
2034
2035 status = nfs4_run_open_task(data, 1);
2036 if (status != 0 || !data->rpc_done)
2037 return status;
2038
6926afd1
TM		 2039 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2040
b257957e
AB		 2041 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2042 status = _nfs4_proc_open_confirm(data);
2043 if (status != 0)
2044 return status;
2045 }
2046
2047 return status;
2048}
2049
f3792d63
TM		 2050/*
2051 * Additional permission checks in order to distinguish between an
2052 * open for read, and an open for execute. This works around the
2053 * fact that NFSv4 OPEN treats read and execute permissions as being
2054 * the same.
2055 * Note that in the non-execute case, we want to turn off permission
2056 * checking if we just created a new file (POSIX open() semantics).
2057 */
6168f62c
WAA		 2058static int nfs4_opendata_access(struct rpc_cred *cred,
2059 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2060 struct nfs4_state *state, fmode_t fmode,
2061 int openflags)
6168f62c
WAA		 2062{
2063 struct nfs_access_entry cache;
2064 u32 mask;
2065
2066 /* access call failed or for some reason the server doesn't
2067 * support any access modes -- defer access call until later */
2068 if (opendata->o_res.access_supported == 0)
2069 return 0;
2070
2071 mask = 0;
f3792d63
TM		 2072 /*
2073 * Use openflags to check for exec, because fmode won't
2074 * always have FMODE_EXEC set when file open for exec.
2075 */
f8d9a897
WAA		 2076 if (openflags & __FMODE_EXEC) {
2077 /* ONLY check for exec rights */
2078 mask = MAY_EXEC;
f3792d63 2079 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2080 mask = MAY_READ;
6168f62c
WAA		 2081
2082 cache.cred = cred;
2083 cache.jiffies = jiffies;
2084 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2085 nfs_access_add_cache(state->inode, &cache);
2086
bbd3a8ee 2087 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2088 return 0;
2089
2090 /* even though OPEN succeeded, access is denied. Close the file */
2091 nfs4_close_state(state, fmode);
998f40b5 2092 return -EACCES;
6168f62c
WAA		 2093}
2094
b257957e
AB		 2095/*
2096 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2097 */
2098static int _nfs4_proc_open(struct nfs4_opendata *data)
2099{
2b0143b5 2100 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2101 struct nfs_server *server = NFS_SERVER(dir);
2102 struct nfs_openargs *o_arg = &data->o_arg;
2103 struct nfs_openres *o_res = &data->o_res;
2104 int status;
2105
2106 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2107 if (!data->rpc_done)
2108 return status;
2109 if (status != 0) {
2110 if (status == -NFS4ERR_BADNAME &&
2111 !(o_arg->open_flags & O_CREAT))
2112 return -ENOENT;
24ac23ab 2113 return status;
08ef7bd3 2114 }
24ac23ab 2115
6926afd1
TM		 2116 nfs_fattr_map_and_free_names(server, &data->f_attr);
2117
5bc2afc2 2118 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2119 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2120 if (o_arg->open_flags & O_EXCL)
2121 data->file_created = 1;
2122 else if (o_res->cinfo.before != o_res->cinfo.after)
2123 data->file_created = 1;
2124 }
0df5dd4a
TM		 2125 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2126 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2127 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2128 status = _nfs4_proc_open_confirm(data);
1da177e4 2129 if (status != 0)
24ac23ab 2130 return status;
1da177e4
LT		 2131 }
2132 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2133 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2134 return 0;
1da177e4
LT		 2135}
2136
d83217c1
AA		 2137static int nfs4_recover_expired_lease(struct nfs_server *server)
2138{
2139 return nfs4_client_recover_expired_lease(server->nfs_client);
2140}
2141
1da177e4
LT		 2142/*
2143 * OPEN_EXPIRED:
2144 * reclaim state on the server after a network partition.
2145 * Assumes caller holds the appropriate lock
2146 */
539cd03a 2147static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2148{
e56e0b78 2149 struct nfs4_opendata *opendata;
864472e9 2150 int ret;
1da177e4 2151
4a1c0893 2152 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2153 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2154 if (IS_ERR(opendata))
2155 return PTR_ERR(opendata);
864472e9 2156 ret = nfs4_open_recover(opendata, state);
35d05778 2157 if (ret == -ESTALE)
3d4ff43d 2158 d_drop(ctx->dentry);
c6d00e63 2159 nfs4_opendata_put(opendata);
864472e9 2160 return ret;
1da177e4
LT		 2161}
2162
a9ed2e25 2163static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2164{
539cd03a 2165 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2166 struct nfs4_exception exception = { };
2167 int err;
2168
2169 do {
539cd03a 2170 err = _nfs4_open_expired(ctx, state);
42113a75 2171 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2172 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2173 continue;
a9ed2e25
TM		 2174 switch (err) {
2175 default:
2176 goto out;
2177 case -NFS4ERR_GRACE:
2178 case -NFS4ERR_DELAY:
2179 nfs4_handle_exception(server, err, &exception);
2180 err = 0;
2181 }
202b50dc 2182 } while (exception.retry);
a9ed2e25 2183out:
202b50dc
TM		 2184 return err;
2185}
2186
1da177e4
LT		 2187static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2188{
1da177e4 2189 struct nfs_open_context *ctx;
864472e9 2190 int ret;
1da177e4 2191
864472e9
TM		 2192 ctx = nfs4_state_find_open_context(state);
2193 if (IS_ERR(ctx))
91876b13 2194 return -EAGAIN;
539cd03a 2195 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2196 put_nfs_open_context(ctx);
2197 return ret;
1da177e4
LT		 2198}
2199
4dfd4f7a
TM		 2200static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2201{
2202 nfs_remove_bad_delegation(state->inode);
2203 write_seqlock(&state->seqlock);
2204 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2205 write_sequnlock(&state->seqlock);
2206 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2207}
2208
2209static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2210{
2211 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2212 nfs_finish_clear_delegation_stateid(state);
2213}
2214
2215static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2216{
2217 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2218 nfs40_clear_delegation_stateid(state);
2219 return nfs4_open_expired(sp, state);
2220}
2221
f062eb6c 2222#if defined(CONFIG_NFS_V4_1)
0c116cad 2223static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2224{
f062eb6c 2225 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2226 nfs4_stateid stateid;
ab7cb0df 2227 struct nfs_delegation *delegation;
0c116cad
TM		 2228 struct rpc_cred *cred;
2229 int status;
3e60ffdd 2230
ab7cb0df
TM		 2231 /* Get the delegation credential for use by test/free_stateid */
2232 rcu_read_lock();
2233 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2234 if (delegation == NULL) {
ab7cb0df 2235 rcu_read_unlock();
0c116cad
TM		 2236 return;
2237 }
2238
2239 nfs4_stateid_copy(&stateid, &delegation->stateid);
2240 cred = get_rpccred(delegation->cred);
2241 rcu_read_unlock();
2242 status = nfs41_test_stateid(server, &stateid, cred);
2243 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df 2244
3e60ffdd
CL		 2245 if (status != NFS_OK) {
2246 /* Free the stateid unless the server explicitly
2247 * informs us the stateid is unrecognized. */
2248 if (status != -NFS4ERR_BAD_STATEID)
0c116cad
TM		 2249 nfs41_free_stateid(server, &stateid, cred);
2250 nfs_finish_clear_delegation_stateid(state);
3e60ffdd 2251 }
ab7cb0df 2252
0c116cad 2253 put_rpccred(cred);
3e60ffdd
CL		 2254}
2255
2256/**
2257 * nfs41_check_open_stateid - possibly free an open stateid
2258 *
2259 * @state: NFSv4 state for an inode
2260 *
2261 * Returns NFS_OK if recovery for this stateid is now finished.
2262 * Otherwise a negative NFS4ERR value is returned.
2263 */
2264static int nfs41_check_open_stateid(struct nfs4_state *state)
2265{
2266 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2267 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2268 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2269 int status;
2270
2271 /* If a state reset has been done, test_stateid is unneeded */
2272 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2273 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2274 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2275 return -NFS4ERR_BAD_STATEID;
2276
ab7cb0df 2277 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2278 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2279 if (status != NFS_OK) {
2280 /* Free the stateid unless the server explicitly
2281 * informs us the stateid is unrecognized. */
2282 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2283 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2284
2285 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2286 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2287 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2288 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2289 }
2290 return status;
2291}
2292
2293static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2294{
eb64cf96 2295 int status;
b01dd1d8 2296
0c116cad 2297 nfs41_check_delegation_stateid(state);
3e60ffdd 2298 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2299 if (status != NFS_OK)
2300 status = nfs4_open_expired(sp, state);
2301 return status;
f062eb6c
BS		 2302}
2303#endif
2304
aa53ed54
JL		 2305/*
2306 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2307 * fields corresponding to attributes that were used to store the verifier.
2308 * Make sure we clobber those fields in the later setattr call
2309 */
2310static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2311{
2312 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2313 !(sattr->ia_valid & ATTR_ATIME_SET))
2314 sattr->ia_valid |= ATTR_ATIME;
2315
2316 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2317 !(sattr->ia_valid & ATTR_MTIME_SET))
2318 sattr->ia_valid |= ATTR_MTIME;
2319}
2320
c21443c2
TM		 2321static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2322 fmode_t fmode,
2323 int flags,
3efb9722 2324 struct nfs_open_context *ctx)
c21443c2
TM		 2325{
2326 struct nfs4_state_owner *sp = opendata->owner;
2327 struct nfs_server *server = sp->so_server;
275bb307 2328 struct dentry *dentry;
c21443c2
TM		 2329 struct nfs4_state *state;
2330 unsigned int seq;
2331 int ret;
2332
2333 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2334
2335 ret = _nfs4_proc_open(opendata);
dca78001 2336 if (ret != 0)
c21443c2
TM		 2337 goto out;
2338
2339 state = nfs4_opendata_to_nfs4_state(opendata);
2340 ret = PTR_ERR(state);
2341 if (IS_ERR(state))
2342 goto out;
2343 if (server->caps & NFS_CAP_POSIX_LOCK)
2344 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2345
275bb307 2346 dentry = opendata->dentry;
2b0143b5 2347 if (d_really_is_negative(dentry)) {
275bb307
TM		 2348 /* FIXME: Is this d_drop() ever needed? */
2349 d_drop(dentry);
2350 dentry = d_add_unique(dentry, igrab(state->inode));
2351 if (dentry == NULL) {
2352 dentry = opendata->dentry;
2353 } else if (dentry != ctx->dentry) {
2354 dput(ctx->dentry);
2355 ctx->dentry = dget(dentry);
2356 }
2357 nfs_set_verifier(dentry,
2b0143b5 2358 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2359 }
2360
c21443c2
TM		 2361 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2362 if (ret != 0)
2363 goto out;
2364
3efb9722 2365 ctx->state = state;
2b0143b5 2366 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2367 nfs_inode_attach_open_context(ctx);
2368 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2369 nfs4_schedule_stateid_recovery(server, state);
2370 }
c21443c2
TM		 2371out:
2372 return ret;
2373}
2374
1da177e4 2375/*
24ac23ab 2376 * Returns a referenced nfs4_state
1da177e4 2377 */
82be417a 2378static int _nfs4_do_open(struct inode *dir,
4197a055 2379 struct nfs_open_context *ctx,
82be417a
AA		 2380 int flags,
2381 struct iattr *sattr,
5bc2afc2
TM		 2382 struct nfs4_label *label,
2383 int *opened)
1da177e4
LT		 2384{
2385 struct nfs4_state_owner *sp;
2386 struct nfs4_state *state = NULL;
2387 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2388 struct nfs4_opendata *opendata;
4197a055
TM		 2389 struct dentry *dentry = ctx->dentry;
2390 struct rpc_cred *cred = ctx->cred;
2391 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2392 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2393 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2394 struct nfs4_label *olabel = NULL;
aac00a8d 2395 int status;
1da177e4
LT		 2396
2397 /* Protect against reboot recovery conflicts */
1da177e4 2398 status = -ENOMEM;
d1e284d5
TM		 2399 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2400 if (sp == NULL) {
1da177e4
LT		 2401 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2402 goto out_err;
2403 }
58d9714a
TM		 2404 status = nfs4_recover_expired_lease(server);
2405 if (status != 0)
b4454fe1 2406 goto err_put_state_owner;
2b0143b5
DH		 2407 if (d_really_is_positive(dentry))
2408 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2409 status = -ENOMEM;
2b0143b5 2410 if (d_really_is_positive(dentry))
49f9a0fa 2411 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2412 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2413 label, claim, GFP_KERNEL);
e56e0b78 2414 if (opendata == NULL)
95d35cb4 2415 goto err_put_state_owner;
1da177e4 2416
14c43f76
DQ		 2417 if (label) {
2418 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2419 if (IS_ERR(olabel)) {
2420 status = PTR_ERR(olabel);
2421 goto err_opendata_put;
2422 }
2423 }
2424
e911b815
TM		 2425 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2426 if (!opendata->f_attr.mdsthreshold) {
2427 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2428 if (!opendata->f_attr.mdsthreshold)
2429 goto err_free_label;
2430 }
1549210f 2431 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2432 }
2b0143b5
DH		 2433 if (d_really_is_positive(dentry))
2434 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2435
3efb9722 2436 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2437 if (status != 0)
14c43f76 2438 goto err_free_label;
3efb9722 2439 state = ctx->state;
6168f62c 2440
efcbc04e 2441 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 2442 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2443 nfs4_exclusive_attrset(opendata, sattr);
2444
2445 nfs_fattr_init(opendata->o_res.f_attr);
2446 status = nfs4_do_setattr(state->inode, cred,
2447 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2448 state, label, olabel);
2449 if (status == 0) {
f044636d
TM		 2450 nfs_setattr_update_inode(state->inode, sattr,
2451 opendata->o_res.f_attr);
aa9c2669 2452 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2453 }
0ab64e0e 2454 }
c5c3fb5f 2455 if (opened && opendata->file_created)
5bc2afc2 2456 *opened |= FILE_CREATED;
82be417a 2457
e911b815 2458 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2459 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2460 opendata->f_attr.mdsthreshold = NULL;
2461 }
82be417a 2462
14c43f76
DQ		 2463 nfs4_label_free(olabel);
2464
c6d00e63 2465 nfs4_opendata_put(opendata);
1da177e4 2466 nfs4_put_state_owner(sp);
1da177e4 2467 return 0;
14c43f76
DQ		 2468err_free_label:
2469 nfs4_label_free(olabel);
c6d00e63
TM		 2470err_opendata_put:
2471 nfs4_opendata_put(opendata);
e56e0b78
TM		 2472err_put_state_owner:
2473 nfs4_put_state_owner(sp);
1da177e4 2474out_err:
1da177e4
LT		 2475 return status;
2476}
2477
2478
82be417a 2479static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2480 struct nfs_open_context *ctx,
82be417a
AA		 2481 int flags,
2482 struct iattr *sattr,
5bc2afc2
TM		 2483 struct nfs4_label *label,
2484 int *opened)
1da177e4 2485{
49f9a0fa 2486 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2487 struct nfs4_exception exception = { };
2488 struct nfs4_state *res;
2489 int status;
2490
2491 do {
5bc2afc2 2492 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2493 res = ctx->state;
42113a75 2494 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2495 if (status == 0)
2496 break;
2497 /* NOTE: BAD_SEQID means the server and client disagree about the
2498 * book-keeping w.r.t. state-changing operations
2499 * (OPEN/CLOSE/LOCK/LOCKU...)
2500 * It is actually a sign of a bug on the client or on the server.
2501 *
2502 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2503 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2504 * have unhashed the old state_owner for us, and that we can
2505 * therefore safely retry using a new one. We should still warn
2506 * the user though...
2507 */
2508 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2509 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2510 " returned a bad sequence-id error!\n",
2511 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2512 exception.retry = 1;
2513 continue;
2514 }
550f5747
TM		 2515 /*
2516 * BAD_STATEID on OPEN means that the server cancelled our
2517 * state before it received the OPEN_CONFIRM.
2518 * Recover by retrying the request as per the discussion
2519 * on Page 181 of RFC3530.
2520 */
2521 if (status == -NFS4ERR_BAD_STATEID) {
2522 exception.retry = 1;
2523 continue;
2524 }
aac00a8d
TM		 2525 if (status == -EAGAIN) {
2526 /* We must have found a delegation */
2527 exception.retry = 1;
2528 continue;
2529 }
49f9a0fa
TM		 2530 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2531 continue;
2532 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2533 status, &exception));
2534 } while (exception.retry);
2535 return res;
2536}
2537
659bfcd6
TM		 2538static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2539 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2540 struct nfs4_state *state, struct nfs4_label *ilabel,
2541 struct nfs4_label *olabel)
1da177e4 2542{
3e4f6290 2543 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2544 struct nfs_setattrargs arg = {
3e4f6290 2545 .fh = NFS_FH(inode),
1da177e4
LT		 2546 .iap = sattr,
2547 .server = server,
2548 .bitmask = server->attr_bitmask,
1775fd3e 2549 .label = ilabel,
1da177e4
LT		 2550 };
2551 struct nfs_setattrres res = {
2552 .fattr = fattr,
1775fd3e 2553 .label = olabel,
1da177e4
LT		 2554 .server = server,
2555 };
2556 struct rpc_message msg = {
659bfcd6
TM		 2557 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2558 .rpc_argp = &arg,
2559 .rpc_resp = &res,
2560 .rpc_cred = cred,
1da177e4 2561 };
26e976a8 2562 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2563 fmode_t fmode;
2564 bool truncate;
65e4308d 2565 int status;
1da177e4 2566
aa9c2669
DQ		 2567 arg.bitmask = nfs4_bitmask(server, ilabel);
2568 if (ilabel)
2569 arg.bitmask = nfs4_bitmask(server, olabel);
2570
0e574af1 2571 nfs_fattr_init(fattr);
1da177e4 2572
ee3ae84e
TM		 2573 /* Servers should only apply open mode checks for file size changes */
2574 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2575 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2576
2577 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2578 /* Use that stateid */
0418dae1 2579 } else if (truncate && state != NULL) {
2a369153
TM		 2580 struct nfs_lockowner lockowner = {
2581 .l_owner = current->files,
2582 .l_pid = current->tgid,
2583 };
0418dae1
TM		 2584 if (!nfs4_valid_open_stateid(state))
2585 return -EBADF;
2586 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2587 &lockowner) == -EIO)
2588 return -EBADF;
08e9eac4 2589 } else
f597c537 2590 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2591
7c513058 2592 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2593 if (status == 0 && state != NULL)
2594 renew_lease(server, timestamp);
65e4308d 2595 return status;
1da177e4
LT		 2596}
2597
659bfcd6
TM		 2598static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2599 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2600 struct nfs4_state *state, struct nfs4_label *ilabel,
2601 struct nfs4_label *olabel)
1da177e4 2602{
3e4f6290 2603 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2604 struct nfs4_exception exception = {
2605 .state = state,
3114ea7a 2606 .inode = inode,
a1d0b5ee 2607 };
1da177e4
LT		 2608 int err;
2609 do {
1775fd3e 2610 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2611 trace_nfs4_setattr(inode, err);
451146be
TM		 2612 switch (err) {
2613 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2614 if (!(sattr->ia_valid & ATTR_SIZE)) {
2615 pr_warn_once("NFSv4: server %s is incorrectly "
2616 "applying open mode checks to "
2617 "a SETATTR that is not "
2618 "changing file size.\n",
2619 server->nfs_client->cl_hostname);
2620 }
451146be
TM		 2621 if (state && !(state->state & FMODE_WRITE)) {
2622 err = -EBADF;
2623 if (sattr->ia_valid & ATTR_OPEN)
2624 err = -EACCES;
2625 goto out;
2626 }
2627 }
2628 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2629 } while (exception.retry);
451146be 2630out:
1da177e4
LT		 2631 return err;
2632}
2633
2634struct nfs4_closedata {
2635 struct inode *inode;
2636 struct nfs4_state *state;
2637 struct nfs_closeargs arg;
2638 struct nfs_closeres res;
516a6af6 2639 struct nfs_fattr fattr;
26e976a8 2640 unsigned long timestamp;
f7e8917a
FI		 2641 bool roc;
2642 u32 roc_barrier;
1da177e4
LT		 2643};
2644
963d8fe5 2645static void nfs4_free_closedata(void *data)
9512135d 2646{
963d8fe5
TM		 2647 struct nfs4_closedata *calldata = data;
2648 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2649 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2650
f7e8917a
FI		 2651 if (calldata->roc)
2652 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2653 nfs4_put_open_state(calldata->state);
2654 nfs_free_seqid(calldata->arg.seqid);
9512135d 2655 nfs4_put_state_owner(sp);
322b2b90 2656 nfs_sb_deactive(sb);
9512135d
TM		 2657 kfree(calldata);
2658}
2659
963d8fe5 2660static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2661{
963d8fe5 2662 struct nfs4_closedata *calldata = data;
1da177e4 2663 struct nfs4_state *state = calldata->state;
1da177e4 2664 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2665 nfs4_stateid *res_stateid = NULL;
1da177e4 2666
a3ca5651 2667 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2668 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2669 return;
42113a75 2670 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2671 /* hmm. we are done with the inode, and in the process of freeing
2672 * the state_owner. we keep this around to process errors
2673 */
1da177e4
LT		 2674 switch (task->tk_status) {
2675 case 0:
412f6c4c 2676 res_stateid = &calldata->res.stateid;
3c13cb5b 2677 if (calldata->roc)
f7e8917a
FI		 2678 pnfs_roc_set_barrier(state->inode,
2679 calldata->roc_barrier);
26e976a8 2680 renew_lease(server, calldata->timestamp);
412f6c4c 2681 break;
69794ad7 2682 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2683 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2684 case -NFS4ERR_OLD_STATEID:
2685 case -NFS4ERR_BAD_STATEID:
1da177e4 2686 case -NFS4ERR_EXPIRED:
566fcec6 2687 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 2688 &state->open_stateid)) {
566fcec6
TM		 2689 rpc_restart_call_prepare(task);
2690 goto out_release;
2691 }
dc0b027d 2692 if (calldata->arg.fmode == 0)
9e33bed5 2693 break;
1da177e4 2694 default:
8478eaa1 2695 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 2696 rpc_restart_call_prepare(task);
69794ad7
TM		 2697 goto out_release;
2698 }
1da177e4 2699 }
412f6c4c 2700 nfs_clear_open_stateid(state, res_stateid, calldata->arg.fmode);
69794ad7 2701out_release:
72211dbe 2702 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2703 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2704 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2705}
2706
4ce70ada 2707static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2708{
4ce70ada 2709 struct nfs4_closedata *calldata = data;
9512135d 2710 struct nfs4_state *state = calldata->state;
7fdab069 2711 struct inode *inode = calldata->inode;
aee7af35 2712 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2713 int call_close = 0;
9512135d 2714
a3ca5651 2715 dprintk("%s: begin!\n", __func__);
963d8fe5 2716 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2717 goto out_wait;
003707c7 2718
88069f77 2719 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2720 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2721 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2722 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2723 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 2724 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 2725 /* Calculate the change in open mode */
cd9288ff 2726 calldata->arg.fmode = 0;
e7616923 2727 if (state->n_rdwr == 0) {
cd9288ff
TM		 2728 if (state->n_rdonly == 0)
2729 call_close |= is_rdonly;
2730 else if (is_rdonly)
2731 calldata->arg.fmode |= FMODE_READ;
2732 if (state->n_wronly == 0)
2733 call_close |= is_wronly;
2734 else if (is_wronly)
2735 calldata->arg.fmode |= FMODE_WRITE;
2736 } else if (is_rdwr)
2737 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2738
2739 if (calldata->arg.fmode == 0)
2740 call_close |= is_rdwr;
2741
5d422301
TM		 2742 if (!nfs4_valid_open_stateid(state))
2743 call_close = 0;
4cecb76f 2744 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2745
2746 if (!call_close) {
963d8fe5 2747 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2748 goto out_no_action;
9512135d 2749 }
88069f77 2750
3c13cb5b 2751 if (calldata->arg.fmode == 0)
88069f77 2752 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
3c13cb5b
TM		 2753 if (calldata->roc)
2754 pnfs_roc_get_barrier(inode, &calldata->roc_barrier);
2755
6ae37339
TM		 2756 calldata->arg.share_access =
2757 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2758 calldata->arg.fmode, 0);
88069f77 2759
516a6af6 2760 nfs_fattr_init(calldata->res.fattr);
26e976a8 2761 calldata->timestamp = jiffies;
7fdab069 2762 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2763 &calldata->arg.seq_args,
2764 &calldata->res.seq_res,
2240a9e2
TM		 2765 task) != 0)
2766 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2767 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2768 return;
2769out_no_action:
2770 task->tk_action = NULL;
2771out_wait:
2772 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2773}
2774
963d8fe5 2775static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2776 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2777 .rpc_call_done = nfs4_close_done,
2778 .rpc_release = nfs4_free_closedata,
2779};
2780
fe08c546
PT		 2781static bool nfs4_roc(struct inode *inode)
2782{
40dd4b7a 2783 if (!nfs_have_layout(inode))
fe08c546 2784 return false;
fe08c546
PT		 2785 return pnfs_roc(inode);
2786}
2787
1da177e4
LT		 2788/*
2789 * It is possible for data to be read/written from a mem-mapped file
2790 * after the sys_close call (which hits the vfs layer as a flush).
2791 * This means that we can't safely call nfsv4 close on a file until
2792 * the inode is cleared. This in turn means that we are not good
2793 * NFSv4 citizens - we do not indicate to the server to update the file's
2794 * share state even when we are done with one of the three share
2795 * stateid's in the inode.
2796 *
2797 * NOTE: Caller must be holding the sp->so_owner semaphore!
2798 */
1f7977c1 2799int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2800{
4a35bd41 2801 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 2802 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 2803 struct nfs4_closedata *calldata;
b39e625b
TM		 2804 struct nfs4_state_owner *sp = state->owner;
2805 struct rpc_task *task;
5138fde0
TM		 2806 struct rpc_message msg = {
2807 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2808 .rpc_cred = state->owner->so_cred,
2809 };
c970aa85
TM		 2810 struct rpc_task_setup task_setup_data = {
2811 .rpc_client = server->client,
5138fde0 2812 .rpc_message = &msg,
c970aa85 2813 .callback_ops = &nfs4_close_ops,
101070ca 2814 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2815 .flags = RPC_TASK_ASYNC,
2816 };
9512135d 2817 int status = -ENOMEM;
1da177e4 2818
fa940720
WAA		 2819 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2820 &task_setup_data.rpc_client, &msg);
2821
8535b2be 2822 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2823 if (calldata == NULL)
9512135d 2824 goto out;
a9c92d6b 2825 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2826 calldata->inode = state->inode;
1da177e4 2827 calldata->state = state;
4a35bd41 2828 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 2829 /* Serialization for the sequence id */
63f5f796
TM		 2830 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2831 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 2832 if (IS_ERR(calldata->arg.seqid))
9512135d 2833 goto out_free_calldata;
dc0b027d 2834 calldata->arg.fmode = 0;
a65318bf 2835 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2836 calldata->res.fattr = &calldata->fattr;
c1d51931 2837 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2838 calldata->res.server = server;
fe08c546 2839 calldata->roc = nfs4_roc(state->inode);
643168c2 2840 nfs_sb_active(calldata->inode->i_sb);
9512135d 2841
1174dd1f
TM		 2842 msg.rpc_argp = &calldata->arg;
2843 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2844 task_setup_data.callback_data = calldata;
2845 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2846 if (IS_ERR(task))
2847 return PTR_ERR(task);
a49c3c77
TM		 2848 status = 0;
2849 if (wait)
2850 status = rpc_wait_for_completion_task(task);
b39e625b 2851 rpc_put_task(task);
a49c3c77 2852 return status;
9512135d
TM		 2853out_free_calldata:
2854 kfree(calldata);
2855out:
b39e625b
TM		 2856 nfs4_put_open_state(state);
2857 nfs4_put_state_owner(sp);
9512135d 2858 return status;
1da177e4
LT		 2859}
2860
2b484297 2861static struct inode *
5bc2afc2
TM		 2862nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2863 int open_flags, struct iattr *attr, int *opened)
1da177e4 2864{
1da177e4 2865 struct nfs4_state *state;
aa9c2669
DQ		 2866 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2867
2868 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2869
565277f6 2870 /* Protect against concurrent sillydeletes */
5bc2afc2 2871 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2872
2873 nfs4_label_release_security(label);
2874
f46e0bd3
TM		 2875 if (IS_ERR(state))
2876 return ERR_CAST(state);
275bb307 2877 return state->inode;
1da177e4
LT		 2878}
2879
1185a552 2880static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2881{
2882 if (ctx->state == NULL)
2883 return;
2884 if (is_sync)
643168c2 2885 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2886 else
643168c2 2887 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2888}
1da177e4 2889
b944dba3
TM		 2890#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2891#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 2892#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 2893
1da177e4
LT		 2894static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2895{
8c61282f 2896 u32 bitmask[3] = {}, minorversion = server->nfs_client->cl_minorversion;
43652ad5
BH		 2897 struct nfs4_server_caps_arg args = {
2898 .fhandle = fhandle,
8c61282f 2899 .bitmask = bitmask,
43652ad5 2900 };
1da177e4
LT		 2901 struct nfs4_server_caps_res res = {};
2902 struct rpc_message msg = {
2903 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2904 .rpc_argp = &args,
1da177e4
LT		 2905 .rpc_resp = &res,
2906 };
2907 int status;
2908
8c61282f
KM		 2909 bitmask[0] = FATTR4_WORD0_SUPPORTED_ATTRS |
2910 FATTR4_WORD0_FH_EXPIRE_TYPE |
2911 FATTR4_WORD0_LINK_SUPPORT |
2912 FATTR4_WORD0_SYMLINK_SUPPORT |
2913 FATTR4_WORD0_ACLSUPPORT;
2914 if (minorversion)
2915 bitmask[2] = FATTR4_WORD2_SUPPATTR_EXCLCREAT;
2916
7c513058 2917 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2918 if (status == 0) {
b944dba3 2919 /* Sanity check the server answers */
8c61282f 2920 switch (minorversion) {
b944dba3
TM		 2921 case 0:
2922 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2923 res.attr_bitmask[2] = 0;
2924 break;
2925 case 1:
2926 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2927 break;
2928 case 2:
2929 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2930 }
1da177e4 2931 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2932 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2933 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2934 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2935 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 2936 NFS_CAP_CTIME|NFS_CAP_MTIME|
2937 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 2938 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2939 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 2940 server->caps |= NFS_CAP_ACLS;
2941 if (res.has_links != 0)
2942 server->caps |= NFS_CAP_HARDLINKS;
2943 if (res.has_symlinks != 0)
2944 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2945 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2946 server->caps |= NFS_CAP_FILEID;
2947 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2948 server->caps |= NFS_CAP_MODE;
2949 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2950 server->caps |= NFS_CAP_NLINK;
2951 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2952 server->caps |= NFS_CAP_OWNER;
2953 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2954 server->caps |= NFS_CAP_OWNER_GROUP;
2955 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2956 server->caps |= NFS_CAP_ATIME;
2957 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2958 server->caps |= NFS_CAP_CTIME;
2959 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2960 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2961#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2962 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2963 server->caps |= NFS_CAP_SECURITY_LABEL;
2964#endif
2965 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2966 sizeof(server->attr_bitmask));
b944dba3 2967 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 2968
a65318bf
TM		 2969 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2970 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2971 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 2972 server->cache_consistency_bitmask[2] = 0;
8c61282f
KM		 2973 memcpy(server->exclcreat_bitmask, res.exclcreat_bitmask,
2974 sizeof(server->exclcreat_bitmask));
1da177e4 2975 server->acl_bitmask = res.acl_bitmask;
264e6351 2976 server->fh_expire_type = res.fh_expire_type;
1da177e4 2977 }
cccef3b9 2978
1da177e4
LT		 2979 return status;
2980}
2981
55a97593 2982int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2983{
2984 struct nfs4_exception exception = { };
2985 int err;
2986 do {
2987 err = nfs4_handle_exception(server,
2988 _nfs4_server_capabilities(server, fhandle),
2989 &exception);
2990 } while (exception.retry);
2991 return err;
2992}
2993
2994static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2995 struct nfs_fsinfo *info)
2996{
aa9c2669 2997 u32 bitmask[3];
1da177e4 2998 struct nfs4_lookup_root_arg args = {
aa9c2669 2999 .bitmask = bitmask,
1da177e4
LT		 3000 };
3001 struct nfs4_lookup_res res = {
3002 .server = server,
0e574af1 3003 .fattr = info->fattr,
1da177e4
LT		 3004 .fh = fhandle,
3005 };
3006 struct rpc_message msg = {
3007 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
3008 .rpc_argp = &args,
3009 .rpc_resp = &res,
3010 };
008f55d0 3011
aa9c2669
DQ		 3012 bitmask[0] = nfs4_fattr_bitmap[0];
3013 bitmask[1] = nfs4_fattr_bitmap[1];
3014 /*
3015 * Process the label in the upcoming getfattr
3016 */
3017 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3018
0e574af1 3019 nfs_fattr_init(info->fattr);
7c513058 3020 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3021}
3022
3023static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3024 struct nfs_fsinfo *info)
3025{
3026 struct nfs4_exception exception = { };
3027 int err;
3028 do {
fb8a5ba8 3029 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3030 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3031 switch (err) {
3032 case 0:
3033 case -NFS4ERR_WRONGSEC:
05e9cfb4 3034 goto out;
fb8a5ba8
BS		 3035 default:
3036 err = nfs4_handle_exception(server, err, &exception);
3037 }
1da177e4 3038 } while (exception.retry);
05e9cfb4 3039out:
1da177e4
LT		 3040 return err;
3041}
3042
8f70e95f
BS		 3043static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3044 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3045{
c2190661
TM		 3046 struct rpc_auth_create_args auth_args = {
3047 .pseudoflavor = flavor,
3048 };
8f70e95f
BS		 3049 struct rpc_auth *auth;
3050 int ret;
3051
c2190661 3052 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3053 if (IS_ERR(auth)) {
75bc8821 3054 ret = -EACCES;
8f70e95f
BS		 3055 goto out;
3056 }
3057 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3058out:
3059 return ret;
3060}
3061
9a744ba3
CL		 3062/*
3063 * Retry pseudoroot lookup with various security flavors. We do this when:
3064 *
3065 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3066 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3067 *
3068 * Returns zero on success, or a negative NFS4ERR value, or a
3069 * negative errno value.
3070 */
801a16dc 3071static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3072 struct nfs_fsinfo *info)
1da177e4 3073{
9a744ba3
CL		 3074 /* Per 3530bis 15.33.5 */
3075 static const rpc_authflavor_t flav_array[] = {
3076 RPC_AUTH_GSS_KRB5P,
3077 RPC_AUTH_GSS_KRB5I,
3078 RPC_AUTH_GSS_KRB5,
c4eafe11 3079 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3080 RPC_AUTH_NULL,
3081 };
3082 int status = -EPERM;
3083 size_t i;
6a1a1e34 3084
4d4b69dd
WAA		 3085 if (server->auth_info.flavor_len > 0) {
3086 /* try each flavor specified by user */
3087 for (i = 0; i < server->auth_info.flavor_len; i++) {
3088 status = nfs4_lookup_root_sec(server, fhandle, info,
3089 server->auth_info.flavors[i]);
3090 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3091 continue;
3092 break;
3093 }
3094 } else {
3095 /* no flavors specified by user, try default list */
3096 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3097 status = nfs4_lookup_root_sec(server, fhandle, info,
3098 flav_array[i]);
3099 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3100 continue;
3101 break;
3102 }
8f70e95f 3103 }
9a744ba3 3104
fb8a5ba8
BS		 3105 /*
3106 * -EACCESS could mean that the user doesn't have correct permissions
3107 * to access the mount. It could also mean that we tried to mount
3108 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3109 * existing mount programs don't handle -EACCES very well so it should
3110 * be mapped to -EPERM instead.
3111 */
3112 if (status == -EACCES)
3113 status = -EPERM;
801a16dc
BS		 3114 return status;
3115}
3116
2ed4b95b
CL		 3117static int nfs4_do_find_root_sec(struct nfs_server *server,
3118 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3119{
3120 int mv = server->nfs_client->cl_minorversion;
3121 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3122}
3123
3124/**
3125 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3126 * @server: initialized nfs_server handle
3127 * @fhandle: we fill in the pseudo-fs root file handle
3128 * @info: we fill in an FSINFO struct
5e6b1990 3129 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3130 *
3131 * Returns zero on success, or a negative errno.
801a16dc 3132 */
3028eb2b 3133int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3134 struct nfs_fsinfo *info,
3135 bool auth_probe)
801a16dc 3136{
c7757074 3137 int status = 0;
2ed4b95b 3138
c7757074 3139 if (!auth_probe)
5e6b1990 3140 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3141
3142 if (auth_probe || status == NFS4ERR_WRONGSEC)
2ed4b95b
CL		 3143 status = nfs4_do_find_root_sec(server, fhandle, info);
3144
1da177e4
LT		 3145 if (status == 0)
3146 status = nfs4_server_capabilities(server, fhandle);
3147 if (status == 0)
3148 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3149
c12e87f4 3150 return nfs4_map_errors(status);
1da177e4
LT		 3151}
3152
bae36241
BS		 3153static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3154 struct nfs_fsinfo *info)
3155{
3156 int error;
3157 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3158 struct nfs4_label *label = NULL;
bae36241
BS		 3159
3160 error = nfs4_server_capabilities(server, mntfh);
3161 if (error < 0) {
3162 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3163 return error;
3164 }
3165
14c43f76
DQ		 3166 label = nfs4_label_alloc(server, GFP_KERNEL);
3167 if (IS_ERR(label))
3168 return PTR_ERR(label);
3169
1775fd3e 3170 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3171 if (error < 0) {
3172 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3173 goto err_free_label;
bae36241
BS		 3174 }
3175
3176 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3177 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3178 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3179
14c43f76
DQ		 3180err_free_label:
3181 nfs4_label_free(label);
3182
bae36241
BS		 3183 return error;
3184}
3185
6b97fd3d
MN		 3186/*
3187 * Get locations and (maybe) other attributes of a referral.
3188 * Note that we'll actually follow the referral later when
3189 * we detect fsid mismatch in inode revalidation
3190 */
f05d147f
BS		 3191static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3192 const struct qstr *name, struct nfs_fattr *fattr,
3193 struct nfs_fh *fhandle)
6b97fd3d
MN		 3194{
3195 int status = -ENOMEM;
3196 struct page *page = NULL;
3197 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3198
3199 page = alloc_page(GFP_KERNEL);
3200 if (page == NULL)
3201 goto out;
3202 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3203 if (locations == NULL)
3204 goto out;
3205
f05d147f 3206 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3207 if (status != 0)
3208 goto out;
519ae255
CL		 3209
3210 /*
3211 * If the fsid didn't change, this is a migration event, not a
3212 * referral. Cause us to drop into the exception handler, which
3213 * will kick off migration recovery.
3214 */
6b97fd3d 3215 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3216 dprintk("%s: server did not return a different fsid for"
3217 " a referral at %s\n", __func__, name->name);
519ae255 3218 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3219 goto out;
3220 }
533eb461
AA		 3221 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3222 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3223
533eb461 3224 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3225 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3226 memset(fhandle, 0, sizeof(struct nfs_fh));
3227out:
3228 if (page)
3229 __free_page(page);
5d7ca35a 3230 kfree(locations);
6b97fd3d
MN		 3231 return status;
3232}
3233
1775fd3e
DQ		 3234static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3235 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3236{
3237 struct nfs4_getattr_arg args = {
3238 .fh = fhandle,
3239 .bitmask = server->attr_bitmask,
3240 };
3241 struct nfs4_getattr_res res = {
3242 .fattr = fattr,
1775fd3e 3243 .label = label,
1da177e4
LT		 3244 .server = server,
3245 };
3246 struct rpc_message msg = {
3247 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3248 .rpc_argp = &args,
3249 .rpc_resp = &res,
3250 };
aa9c2669
DQ		 3251
3252 args.bitmask = nfs4_bitmask(server, label);
3253
0e574af1 3254 nfs_fattr_init(fattr);
7c513058 3255 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3256}
3257
1775fd3e
DQ		 3258static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3259 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3260{
3261 struct nfs4_exception exception = { };
3262 int err;
3263 do {
b5f875a9
TM		 3264 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3265 trace_nfs4_getattr(server, fhandle, fattr, err);
3266 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3267 &exception);
3268 } while (exception.retry);
3269 return err;
3270}
3271
3272/*
3273 * The file is not closed if it is opened due to the a request to change
3274 * the size of the file. The open call will not be needed once the
3275 * VFS layer lookup-intents are implemented.
3276 *
3277 * Close is called when the inode is destroyed.
3278 * If we haven't opened the file for O_WRONLY, we
3279 * need to in the size_change case to obtain a stateid.
3280 *
3281 * Got race?
3282 * Because OPEN is always done by name in nfsv4, it is
3283 * possible that we opened a different file by the same
3284 * name. We can recognize this race condition, but we
3285 * can't do anything about it besides returning an error.
3286 *
3287 * This will be fixed with VFS changes (lookup-intent).
3288 */
3289static int
3290nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3291 struct iattr *sattr)
3292{
2b0143b5 3293 struct inode *inode = d_inode(dentry);
659bfcd6 3294 struct rpc_cred *cred = NULL;
d530838b 3295 struct nfs4_state *state = NULL;
14c43f76 3296 struct nfs4_label *label = NULL;
1da177e4
LT		 3297 int status;
3298
88ac815c
PT		 3299 if (pnfs_ld_layoutret_on_setattr(inode) &&
3300 sattr->ia_valid & ATTR_SIZE &&
3301 sattr->ia_size < i_size_read(inode))
24028672 3302 pnfs_commit_and_return_layout(inode);
8a1636c4 3303
0e574af1 3304 nfs_fattr_init(fattr);
1da177e4 3305
2669940d
AA		 3306 /* Deal with open(O_TRUNC) */
3307 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3308 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3309
3310 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3311 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3312 return 0;
3313
d530838b 3314 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3315 if (sattr->ia_valid & ATTR_FILE) {
3316 struct nfs_open_context *ctx;
3317
3318 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3319 if (ctx) {
3320 cred = ctx->cred;
3321 state = ctx->state;
3322 }
659bfcd6 3323 }
08e9eac4 3324
14c43f76
DQ		 3325 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3326 if (IS_ERR(label))
3327 return PTR_ERR(label);
3328
3329 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3330 if (status == 0) {
f044636d 3331 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3332 nfs_setsecurity(inode, fattr, label);
3333 }
14c43f76 3334 nfs4_label_free(label);
1da177e4
LT		 3335 return status;
3336}
3337
0c2e53f1
TM		 3338static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3339 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3340 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3341{
0c2e53f1 3342 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3343 int status;
3344 struct nfs4_lookup_arg args = {
3345 .bitmask = server->attr_bitmask,
0c2e53f1 3346 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3347 .name = name,
3348 };
3349 struct nfs4_lookup_res res = {
3350 .server = server,
3351 .fattr = fattr,
aa9c2669 3352 .label = label,
2b3de441
DH		 3353 .fh = fhandle,
3354 };
3355 struct rpc_message msg = {
3356 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3357 .rpc_argp = &args,
3358 .rpc_resp = &res,
3359 };
3360
aa9c2669
DQ		 3361 args.bitmask = nfs4_bitmask(server, label);
3362
2b3de441
DH		 3363 nfs_fattr_init(fattr);
3364
1da177e4 3365 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3366 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3367 dprintk("NFS reply lookup: %d\n", status);
3368 return status;
3369}
3370
72de53ec 3371static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3372{
7ebb9315 3373 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3374 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3375 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3376 fattr->nlink = 2;
3377}
3378
72de53ec
BS		 3379static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3380 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3381 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3382{
3383 struct nfs4_exception exception = { };
72de53ec 3384 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3385 int err;
3386 do {
1775fd3e 3387 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3388 trace_nfs4_lookup(dir, name, err);
72de53ec 3389 switch (err) {
08ef7bd3 3390 case -NFS4ERR_BADNAME:
72de53ec
BS		 3391 err = -ENOENT;
3392 goto out;
0c2e53f1 3393 case -NFS4ERR_MOVED:
f05d147f 3394 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3395 if (err == -NFS4ERR_MOVED)
3396 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3397 goto out;
0c2e53f1 3398 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3399 err = -EPERM;
3400 if (client != *clnt)
3401 goto out;
66b06860 3402 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3403 if (IS_ERR(client))
3404 return PTR_ERR(client);
3405
3406 exception.retry = 1;
3407 break;
3408 default:
3409 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3410 }
1da177e4 3411 } while (exception.retry);
72de53ec
BS		 3412
3413out:
3414 if (err == 0)
3415 *clnt = client;
3416 else if (client != *clnt)
3417 rpc_shutdown_client(client);
3418
1da177e4
LT		 3419 return err;
3420}
3421
80a16b21 3422static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3423 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3424 struct nfs4_label *label)
72de53ec
BS		 3425{
3426 int status;
3427 struct rpc_clnt *client = NFS_CLIENT(dir);
3428
1775fd3e 3429 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3430 if (client != NFS_CLIENT(dir)) {
3431 rpc_shutdown_client(client);
3432 nfs_fixup_secinfo_attributes(fattr);
3433 }
3434 return status;
3435}
3436
f05d147f
BS		 3437struct rpc_clnt *
3438nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3439 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3440{
b72888cb 3441 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3442 int status;
f05d147f 3443
1775fd3e 3444 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3445 if (status < 0)
f05d147f 3446 return ERR_PTR(status);
b72888cb 3447 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3448}
3449
1da177e4
LT		 3450static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3451{
76b32999 3452 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3453 struct nfs4_accessargs args = {
3454 .fh = NFS_FH(inode),
a4980e78 3455 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3456 };
3457 struct nfs4_accessres res = {
3458 .server = server,
1da177e4 3459 };
1da177e4
LT		 3460 struct rpc_message msg = {
3461 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3462 .rpc_argp = &args,
3463 .rpc_resp = &res,
3464 .rpc_cred = entry->cred,
3465 };
3466 int mode = entry->mask;
aa9c2669 3467 int status = 0;
1da177e4
LT		 3468
3469 /*
3470 * Determine which access bits we want to ask for...
3471 */
3472 if (mode & MAY_READ)
3473 args.access |= NFS4_ACCESS_READ;
3474 if (S_ISDIR(inode->i_mode)) {
3475 if (mode & MAY_WRITE)
3476 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3477 if (mode & MAY_EXEC)
3478 args.access |= NFS4_ACCESS_LOOKUP;
3479 } else {
3480 if (mode & MAY_WRITE)
3481 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3482 if (mode & MAY_EXEC)
3483 args.access |= NFS4_ACCESS_EXECUTE;
3484 }
c407d41a
TM		 3485
3486 res.fattr = nfs_alloc_fattr();
3487 if (res.fattr == NULL)
3488 return -ENOMEM;
3489
7c513058 3490 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3491 if (!status) {
6168f62c 3492 nfs_access_set_mask(entry, res.access);
c407d41a 3493 nfs_refresh_inode(inode, res.fattr);
1da177e4 3494 }
c407d41a 3495 nfs_free_fattr(res.fattr);
1da177e4
LT		 3496 return status;
3497}
3498
3499static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3500{
3501 struct nfs4_exception exception = { };
3502 int err;
3503 do {
c1578b76
TM		 3504 err = _nfs4_proc_access(inode, entry);
3505 trace_nfs4_access(inode, err);
3506 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3507 &exception);
3508 } while (exception.retry);
3509 return err;
3510}
3511
3512/*
3513 * TODO: For the time being, we don't try to get any attributes
3514 * along with any of the zero-copy operations READ, READDIR,
3515 * READLINK, WRITE.
3516 *
3517 * In the case of the first three, we want to put the GETATTR
3518 * after the read-type operation -- this is because it is hard
3519 * to predict the length of a GETATTR response in v4, and thus
3520 * align the READ data correctly. This means that the GETATTR
3521 * may end up partially falling into the page cache, and we should
3522 * shift it into the 'tail' of the xdr_buf before processing.
3523 * To do this efficiently, we need to know the total length
3524 * of data received, which doesn't seem to be available outside
3525 * of the RPC layer.
3526 *
3527 * In the case of WRITE, we also want to put the GETATTR after
3528 * the operation -- in this case because we want to make sure
140150db 3529 * we get the post-operation mtime and size.
1da177e4
LT		 3530 *
3531 * Both of these changes to the XDR layer would in fact be quite
3532 * minor, but I decided to leave them for a subsequent patch.
3533 */
3534static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3535 unsigned int pgbase, unsigned int pglen)
3536{
3537 struct nfs4_readlink args = {
3538 .fh = NFS_FH(inode),
3539 .pgbase = pgbase,
3540 .pglen = pglen,
3541 .pages = &page,
3542 };
f50c7000 3543 struct nfs4_readlink_res res;
1da177e4
LT		 3544 struct rpc_message msg = {
3545 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3546 .rpc_argp = &args,
f50c7000 3547 .rpc_resp = &res,
1da177e4
LT		 3548 };
3549
7c513058 3550 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3551}
3552
3553static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3554 unsigned int pgbase, unsigned int pglen)
3555{
3556 struct nfs4_exception exception = { };
3557 int err;
3558 do {
c1578b76
TM		 3559 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3560 trace_nfs4_readlink(inode, err);
3561 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3562 &exception);
3563 } while (exception.retry);
3564 return err;
3565}
3566
1da177e4 3567/*
8867fe58 3568 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3569 */
1da177e4
LT		 3570static int
3571nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3572 int flags)
1da177e4 3573{
aa9c2669 3574 struct nfs4_label l, *ilabel = NULL;
8867fe58 3575 struct nfs_open_context *ctx;
1da177e4 3576 struct nfs4_state *state;
1da177e4
LT		 3577 int status = 0;
3578
8867fe58
MS		 3579 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3580 if (IS_ERR(ctx))
3581 return PTR_ERR(ctx);
3582
aa9c2669
DQ		 3583 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3584
a8a5da99 3585 sattr->ia_mode &= ~current_umask();
c5c3fb5f 3586 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, NULL);
1da177e4
LT		 3587 if (IS_ERR(state)) {
3588 status = PTR_ERR(state);
c0204fd2 3589 goto out;
1da177e4 3590 }
1da177e4 3591out:
aa9c2669 3592 nfs4_label_release_security(ilabel);
8867fe58 3593 put_nfs_open_context(ctx);
1da177e4
LT		 3594 return status;
3595}
3596
3597static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3598{
16e42959 3599 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3600 struct nfs_removeargs args = {
1da177e4 3601 .fh = NFS_FH(dir),
26fe5750 3602 .name = *name,
16e42959 3603 };
4fdc17b2 3604 struct nfs_removeres res = {
16e42959 3605 .server = server,
1da177e4 3606 };
1da177e4 3607 struct rpc_message msg = {
4fdc17b2
TM		 3608 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3609 .rpc_argp = &args,
3610 .rpc_resp = &res,
1da177e4 3611 };
778d2817 3612 int status;
1da177e4 3613
7c513058 3614 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3615 if (status == 0)
16e42959 3616 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3617 return status;
3618}
3619
3620static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3621{
3622 struct nfs4_exception exception = { };
3623 int err;
3624 do {
078ea3df
TM		 3625 err = _nfs4_proc_remove(dir, name);
3626 trace_nfs4_remove(dir, name, err);
3627 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3628 &exception);
3629 } while (exception.retry);
3630 return err;
3631}
3632
e4eff1a6 3633static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3634{
e4eff1a6
TM		 3635 struct nfs_server *server = NFS_SERVER(dir);
3636 struct nfs_removeargs *args = msg->rpc_argp;
3637 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3638
e4eff1a6 3639 res->server = server;
1da177e4 3640 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3641 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3642
3643 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3644}
3645
34e137cc
BS		 3646static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3647{
d9afbd1b
TM		 3648 nfs4_setup_sequence(NFS_SERVER(data->dir),
3649 &data->args.seq_args,
3650 &data->res.seq_res,
3651 task);
1da177e4
LT		 3652}
3653
e4eff1a6 3654static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3655{
078ea3df
TM		 3656 struct nfs_unlinkdata *data = task->tk_calldata;
3657 struct nfs_removeres *res = &data->res;
e4eff1a6 3658
14516c3a
TM		 3659 if (!nfs4_sequence_done(task, &res->seq_res))
3660 return 0;
8478eaa1
N		 3661 if (nfs4_async_handle_error(task, res->server, NULL,
3662 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3663 return 0;
3664 update_changeattr(dir, &res->cinfo);
e4eff1a6 3665 return 1;
1da177e4
LT		 3666}
3667
d3d4152a
JL		 3668static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3669{
3670 struct nfs_server *server = NFS_SERVER(dir);
3671 struct nfs_renameargs *arg = msg->rpc_argp;
3672 struct nfs_renameres *res = msg->rpc_resp;
3673
3674 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3675 res->server = server;
a9c92d6b 3676 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3677}
3678
c6bfa1a1
BS		 3679static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3680{
d9afbd1b
TM		 3681 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3682 &data->args.seq_args,
3683 &data->res.seq_res,
3684 task);
d3d4152a
JL		 3685}
3686
3687static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3688 struct inode *new_dir)
3689{
fbc6f7c2
TM		 3690 struct nfs_renamedata *data = task->tk_calldata;
3691 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3692
3693 if (!nfs4_sequence_done(task, &res->seq_res))
3694 return 0;
8478eaa1 3695 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3696 return 0;
3697
3698 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3699 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3700 return 1;
3701}
3702
1da177e4
LT		 3703static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3704{
91ba2eee 3705 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3706 struct nfs4_link_arg arg = {
3707 .fh = NFS_FH(inode),
3708 .dir_fh = NFS_FH(dir),
3709 .name = name,
91ba2eee
TM		 3710 .bitmask = server->attr_bitmask,
3711 };
91ba2eee
TM		 3712 struct nfs4_link_res res = {
3713 .server = server,
1775fd3e 3714 .label = NULL,
1da177e4 3715 };
1da177e4
LT		 3716 struct rpc_message msg = {
3717 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3718 .rpc_argp = &arg,
91ba2eee 3719 .rpc_resp = &res,
1da177e4 3720 };
136f2627
TM		 3721 int status = -ENOMEM;
3722
3723 res.fattr = nfs_alloc_fattr();
778d2817 3724 if (res.fattr == NULL)
136f2627 3725 goto out;
1da177e4 3726
14c43f76
DQ		 3727 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3728 if (IS_ERR(res.label)) {
3729 status = PTR_ERR(res.label);
3730 goto out;
3731 }
aa9c2669 3732 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3733
7c513058 3734 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3735 if (!status) {
3736 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3737 status = nfs_post_op_update_inode(inode, res.fattr);
3738 if (!status)
3739 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3740 }
14c43f76
DQ		 3741
3742
3743 nfs4_label_free(res.label);
3744
136f2627 3745out:
136f2627 3746 nfs_free_fattr(res.fattr);
1da177e4
LT		 3747 return status;
3748}
3749
3750static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3751{
3752 struct nfs4_exception exception = { };
3753 int err;
3754 do {
3755 err = nfs4_handle_exception(NFS_SERVER(inode),
3756 _nfs4_proc_link(inode, dir, name),
3757 &exception);
3758 } while (exception.retry);
3759 return err;
3760}
3761
57dc9a57
TM		 3762struct nfs4_createdata {
3763 struct rpc_message msg;
3764 struct nfs4_create_arg arg;
3765 struct nfs4_create_res res;
3766 struct nfs_fh fh;
3767 struct nfs_fattr fattr;
1775fd3e 3768 struct nfs4_label *label;
57dc9a57
TM		 3769};
3770
3771static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3772 struct qstr *name, struct iattr *sattr, u32 ftype)
3773{
3774 struct nfs4_createdata *data;
3775
3776 data = kzalloc(sizeof(*data), GFP_KERNEL);
3777 if (data != NULL) {
3778 struct nfs_server *server = NFS_SERVER(dir);
3779
14c43f76
DQ		 3780 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3781 if (IS_ERR(data->label))
3782 goto out_free;
3783
57dc9a57
TM		 3784 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3785 data->msg.rpc_argp = &data->arg;
3786 data->msg.rpc_resp = &data->res;
3787 data->arg.dir_fh = NFS_FH(dir);
3788 data->arg.server = server;
3789 data->arg.name = name;
3790 data->arg.attrs = sattr;
3791 data->arg.ftype = ftype;
aa9c2669 3792 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3793 data->res.server = server;
3794 data->res.fh = &data->fh;
3795 data->res.fattr = &data->fattr;
1775fd3e 3796 data->res.label = data->label;
57dc9a57 3797 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3798 }
3799 return data;
14c43f76
DQ		 3800out_free:
3801 kfree(data);
3802 return NULL;
57dc9a57
TM		 3803}
3804
3805static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3806{
7c513058 3807 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3808 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3809 if (status == 0) {
3810 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3811 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3812 }
3813 return status;
3814}
3815
3816static void nfs4_free_createdata(struct nfs4_createdata *data)
3817{
14c43f76 3818 nfs4_label_free(data->label);
57dc9a57
TM		 3819 kfree(data);
3820}
3821
4f390c15 3822static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3823 struct page *page, unsigned int len, struct iattr *sattr,
3824 struct nfs4_label *label)
1da177e4 3825{
57dc9a57
TM		 3826 struct nfs4_createdata *data;
3827 int status = -ENAMETOOLONG;
1da177e4 3828
94a6d753 3829 if (len > NFS4_MAXPATHLEN)
57dc9a57 3830 goto out;
4f390c15 3831
57dc9a57
TM		 3832 status = -ENOMEM;
3833 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3834 if (data == NULL)
3835 goto out;
3836
3837 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3838 data->arg.u.symlink.pages = &page;
3839 data->arg.u.symlink.len = len;
1775fd3e 3840 data->arg.label = label;
1da177e4 3841
57dc9a57
TM		 3842 status = nfs4_do_create(dir, dentry, data);
3843
3844 nfs4_free_createdata(data);
3845out:
1da177e4
LT		 3846 return status;
3847}
3848
4f390c15 3849static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3850 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3851{
3852 struct nfs4_exception exception = { };
aa9c2669 3853 struct nfs4_label l, *label = NULL;
1da177e4 3854 int err;
aa9c2669
DQ		 3855
3856 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3857
1da177e4 3858 do {
078ea3df
TM		 3859 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3860 trace_nfs4_symlink(dir, &dentry->d_name, err);
3861 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3862 &exception);
3863 } while (exception.retry);
aa9c2669
DQ		 3864
3865 nfs4_label_release_security(label);
1da177e4
LT		 3866 return err;
3867}
3868
3869static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3870 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3871{
57dc9a57
TM		 3872 struct nfs4_createdata *data;
3873 int status = -ENOMEM;
1da177e4 3874
57dc9a57
TM		 3875 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3876 if (data == NULL)
3877 goto out;
3878
1775fd3e 3879 data->arg.label = label;
57dc9a57
TM		 3880 status = nfs4_do_create(dir, dentry, data);
3881
3882 nfs4_free_createdata(data);
3883out:
1da177e4
LT		 3884 return status;
3885}
3886
3887static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3888 struct iattr *sattr)
3889{
3890 struct nfs4_exception exception = { };
aa9c2669 3891 struct nfs4_label l, *label = NULL;
1da177e4 3892 int err;
a8a5da99 3893
aa9c2669
DQ		 3894 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3895
a8a5da99 3896 sattr->ia_mode &= ~current_umask();
1da177e4 3897 do {
078ea3df
TM		 3898 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3899 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3900 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3901 &exception);
3902 } while (exception.retry);
aa9c2669
DQ		 3903 nfs4_label_release_security(label);
3904
1da177e4
LT		 3905 return err;
3906}
3907
3908static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3909 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4 3910{
2b0143b5 3911 struct inode *dir = d_inode(dentry);
1da177e4
LT		 3912 struct nfs4_readdir_arg args = {
3913 .fh = NFS_FH(dir),
56e4ebf8 3914 .pages = pages,
1da177e4
LT		 3915 .pgbase = 0,
3916 .count = count,
2b0143b5 3917 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 3918 .plus = plus,
1da177e4
LT		 3919 };
3920 struct nfs4_readdir_res res;
3921 struct rpc_message msg = {
3922 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3923 .rpc_argp = &args,
3924 .rpc_resp = &res,
3925 .rpc_cred = cred,
3926 };
3927 int status;
3928
6de1472f
AV		 3929 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3930 dentry,
eadf4598 3931 (unsigned long long)cookie);
c3f52af3 3932 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3933 res.pgbase = args.pgbase;
7c513058 3934 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3935 if (status >= 0) {
c3f52af3 3936 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3937 status += args.pgbase;
3938 }
c4812998
TM		 3939
3940 nfs_invalidate_atime(dir);
3941
3110ff80 3942 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3943 return status;
3944}
3945
3946static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3947 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3948{
3949 struct nfs4_exception exception = { };
3950 int err;
3951 do {
c1578b76
TM		 3952 err = _nfs4_proc_readdir(dentry, cred, cookie,
3953 pages, count, plus);
2b0143b5
DH		 3954 trace_nfs4_readdir(d_inode(dentry), err);
3955 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 3956 &exception);
3957 } while (exception.retry);
3958 return err;
3959}
3960
3961static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3962 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3963{
57dc9a57
TM		 3964 struct nfs4_createdata *data;
3965 int mode = sattr->ia_mode;
3966 int status = -ENOMEM;
1da177e4 3967
57dc9a57
TM		 3968 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3969 if (data == NULL)
3970 goto out;
3971
1da177e4 3972 if (S_ISFIFO(mode))
57dc9a57 3973 data->arg.ftype = NF4FIFO;
1da177e4 3974 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3975 data->arg.ftype = NF4BLK;
3976 data->arg.u.device.specdata1 = MAJOR(rdev);
3977 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3978 }
3979 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3980 data->arg.ftype = NF4CHR;
3981 data->arg.u.device.specdata1 = MAJOR(rdev);
3982 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3983 } else if (!S_ISSOCK(mode)) {
3984 status = -EINVAL;
3985 goto out_free;
1da177e4 3986 }
1775fd3e 3987
aa9c2669 3988 data->arg.label = label;
57dc9a57 3989 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3990out_free:
57dc9a57
TM		 3991 nfs4_free_createdata(data);
3992out:
1da177e4
LT		 3993 return status;
3994}
3995
3996static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3997 struct iattr *sattr, dev_t rdev)
3998{
3999 struct nfs4_exception exception = { };
aa9c2669 4000 struct nfs4_label l, *label = NULL;
1da177e4 4001 int err;
a8a5da99 4002
aa9c2669
DQ		 4003 label = nfs4_label_init_security(dir, dentry, sattr, &l);
4004
a8a5da99 4005 sattr->ia_mode &= ~current_umask();
1da177e4 4006 do {
078ea3df
TM		 4007 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
4008 trace_nfs4_mknod(dir, &dentry->d_name, err);
4009 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 4010 &exception);
4011 } while (exception.retry);
aa9c2669
DQ		 4012
4013 nfs4_label_release_security(label);
4014
1da177e4
LT		 4015 return err;
4016}
4017
4018static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4019 struct nfs_fsstat *fsstat)
4020{
4021 struct nfs4_statfs_arg args = {
4022 .fh = fhandle,
4023 .bitmask = server->attr_bitmask,
4024 };
24ad148a
BH		 4025 struct nfs4_statfs_res res = {
4026 .fsstat = fsstat,
4027 };
1da177e4
LT		 4028 struct rpc_message msg = {
4029 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4030 .rpc_argp = &args,
24ad148a 4031 .rpc_resp = &res,
1da177e4
LT		 4032 };
4033
0e574af1 4034 nfs_fattr_init(fsstat->fattr);
7c513058 4035 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4036}
4037
4038static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4039{
4040 struct nfs4_exception exception = { };
4041 int err;
4042 do {
4043 err = nfs4_handle_exception(server,
4044 _nfs4_proc_statfs(server, fhandle, fsstat),
4045 &exception);
4046 } while (exception.retry);
4047 return err;
4048}
4049
4050static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4051 struct nfs_fsinfo *fsinfo)
4052{
4053 struct nfs4_fsinfo_arg args = {
4054 .fh = fhandle,
4055 .bitmask = server->attr_bitmask,
4056 };
3dda5e43
BH		 4057 struct nfs4_fsinfo_res res = {
4058 .fsinfo = fsinfo,
4059 };
1da177e4
LT		 4060 struct rpc_message msg = {
4061 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4062 .rpc_argp = &args,
3dda5e43 4063 .rpc_resp = &res,
1da177e4
LT		 4064 };
4065
7c513058 4066 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4067}
4068
4069static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4070{
4071 struct nfs4_exception exception = { };
83ca7f5a 4072 unsigned long now = jiffies;
1da177e4
LT		 4073 int err;
4074
4075 do {
83ca7f5a 4076 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4077 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 4078 if (err == 0) {
4079 struct nfs_client *clp = server->nfs_client;
4080
4081 spin_lock(&clp->cl_lock);
4082 clp->cl_lease_time = fsinfo->lease_time * HZ;
4083 clp->cl_last_renewal = now;
4084 spin_unlock(&clp->cl_lock);
4085 break;
4086 }
4087 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4088 } while (exception.retry);
4089 return err;
4090}
4091
4092static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4093{
e38eb650
BS		 4094 int error;
4095
0e574af1 4096 nfs_fattr_init(fsinfo->fattr);
e38eb650 4097 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4098 if (error == 0) {
4099 /* block layout checks this! */
4100 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4101 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4102 }
e38eb650
BS		 4103
4104 return error;
1da177e4
LT		 4105}
4106
4107static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4108 struct nfs_pathconf *pathconf)
4109{
4110 struct nfs4_pathconf_arg args = {
4111 .fh = fhandle,
4112 .bitmask = server->attr_bitmask,
4113 };
d45b2989
BH		 4114 struct nfs4_pathconf_res res = {
4115 .pathconf = pathconf,
4116 };
1da177e4
LT		 4117 struct rpc_message msg = {
4118 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4119 .rpc_argp = &args,
d45b2989 4120 .rpc_resp = &res,
1da177e4
LT		 4121 };
4122
4123 /* None of the pathconf attributes are mandatory to implement */
4124 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4125 memset(pathconf, 0, sizeof(*pathconf));
4126 return 0;
4127 }
4128
0e574af1 4129 nfs_fattr_init(pathconf->fattr);
7c513058 4130 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4131}
4132
4133static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4134 struct nfs_pathconf *pathconf)
4135{
4136 struct nfs4_exception exception = { };
4137 int err;
4138
4139 do {
4140 err = nfs4_handle_exception(server,
4141 _nfs4_proc_pathconf(server, fhandle, pathconf),
4142 &exception);
4143 } while (exception.retry);
4144 return err;
4145}
4146
5521abfd 4147int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4148 const struct nfs_open_context *ctx,
4149 const struct nfs_lock_context *l_ctx,
4150 fmode_t fmode)
4151{
4152 const struct nfs_lockowner *lockowner = NULL;
4153
4154 if (l_ctx != NULL)
4155 lockowner = &l_ctx->lockowner;
5521abfd 4156 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4157}
4158EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4159
5521abfd
TM		 4160static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4161 const struct nfs_open_context *ctx,
4162 const struct nfs_lock_context *l_ctx,
4163 fmode_t fmode)
4164{
4165 nfs4_stateid current_stateid;
4166
e1253be0
TM		 4167 /* If the current stateid represents a lost lock, then exit */
4168 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4169 return true;
5521abfd
TM		 4170 return nfs4_stateid_match(stateid, &current_stateid);
4171}
4172
4173static bool nfs4_error_stateid_expired(int err)
4174{
4175 switch (err) {
4176 case -NFS4ERR_DELEG_REVOKED:
4177 case -NFS4ERR_ADMIN_REVOKED:
4178 case -NFS4ERR_BAD_STATEID:
4179 case -NFS4ERR_STALE_STATEID:
4180 case -NFS4ERR_OLD_STATEID:
4181 case -NFS4ERR_OPENMODE:
4182 case -NFS4ERR_EXPIRED:
4183 return true;
4184 }
4185 return false;
4186}
4187
d45f60c6 4188void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4189{
d45f60c6 4190 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4191}
4192
d45f60c6 4193static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4194{
d45f60c6 4195 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4196
d45f60c6
WAA		 4197 trace_nfs4_read(hdr, task->tk_status);
4198 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4199 hdr->args.context->state,
4200 NULL) == -EAGAIN) {
d00c5d43 4201 rpc_restart_call_prepare(task);
ec06c096 4202 return -EAGAIN;
1da177e4 4203 }
8850df99 4204
d45f60c6 4205 __nfs4_read_done_cb(hdr);
1da177e4 4206 if (task->tk_status > 0)
d45f60c6 4207 renew_lease(server, hdr->timestamp);
ec06c096 4208 return 0;
1da177e4
LT		 4209}
4210
5521abfd 4211static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4212 struct nfs_pgio_args *args)
5521abfd
TM		 4213{
4214
4215 if (!nfs4_error_stateid_expired(task->tk_status) ||
4216 nfs4_stateid_is_current(&args->stateid,
4217 args->context,
4218 args->lock_context,
4219 FMODE_READ))
4220 return false;
4221 rpc_restart_call_prepare(task);
4222 return true;
4223}
4224
d45f60c6 4225static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4226{
4227
4228 dprintk("--> %s\n", __func__);
4229
d45f60c6 4230 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4231 return -EAGAIN;
d45f60c6 4232 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4233 return -EAGAIN;
d45f60c6
WAA		 4234 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4235 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4236}
4237
d45f60c6
WAA		 4238static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4239 struct rpc_message *msg)
1da177e4 4240{
d45f60c6
WAA		 4241 hdr->timestamp = jiffies;
4242 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4243 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4244 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4245}
4246
d45f60c6
WAA		 4247static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4248 struct nfs_pgio_header *hdr)
ea7c3303 4249{
d45f60c6
WAA		 4250 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4251 &hdr->args.seq_args,
4252 &hdr->res.seq_res,
9b206149 4253 task))
ef1820f9 4254 return 0;
d45f60c6
WAA		 4255 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4256 hdr->args.lock_context,
4257 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4258 return -EIO;
d45f60c6 4259 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4260 return -EIO;
4261 return 0;
1da177e4
LT		 4262}
4263
d45f60c6
WAA		 4264static int nfs4_write_done_cb(struct rpc_task *task,
4265 struct nfs_pgio_header *hdr)
1da177e4 4266{
d45f60c6 4267 struct inode *inode = hdr->inode;
8478eaa1 4268
d45f60c6
WAA		 4269 trace_nfs4_write(hdr, task->tk_status);
4270 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4271 hdr->args.context->state,
4272 NULL) == -EAGAIN) {
d00c5d43 4273 rpc_restart_call_prepare(task);
788e7a89 4274 return -EAGAIN;
1da177e4 4275 }
4f9838c7 4276 if (task->tk_status >= 0) {
d45f60c6 4277 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4278 nfs_writeback_update_inode(hdr);
4f9838c7 4279 }
788e7a89 4280 return 0;
1da177e4
LT		 4281}
4282
5521abfd 4283static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4284 struct nfs_pgio_args *args)
5521abfd
TM		 4285{
4286
4287 if (!nfs4_error_stateid_expired(task->tk_status) ||
4288 nfs4_stateid_is_current(&args->stateid,
4289 args->context,
4290 args->lock_context,
4291 FMODE_WRITE))
4292 return false;
4293 rpc_restart_call_prepare(task);
4294 return true;
4295}
4296
d45f60c6 4297static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4298{
d45f60c6 4299 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4300 return -EAGAIN;
d45f60c6 4301 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4302 return -EAGAIN;
d45f60c6
WAA		 4303 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4304 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4305}
4306
5a37f851 4307static
d45f60c6 4308bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4309{
5a37f851 4310 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4311 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4312 return false;
4313 /* Otherwise, request attributes if and only if we don't hold
4314 * a delegation
4315 */
011e2a7f 4316 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4317}
a69aef14 4318
d45f60c6
WAA		 4319static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4320 struct rpc_message *msg)
1da177e4 4321{
d45f60c6 4322 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4323
d45f60c6
WAA		 4324 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4325 hdr->args.bitmask = NULL;
4326 hdr->res.fattr = NULL;
7ffd1064 4327 } else
d45f60c6 4328 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4329
d45f60c6
WAA		 4330 if (!hdr->pgio_done_cb)
4331 hdr->pgio_done_cb = nfs4_write_done_cb;
4332 hdr->res.server = server;
4333 hdr->timestamp = jiffies;
1da177e4 4334
bdc7f021 4335 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4336 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4337}
4338
0b7c0153 4339static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4340{
d9afbd1b
TM		 4341 nfs4_setup_sequence(NFS_SERVER(data->inode),
4342 &data->args.seq_args,
4343 &data->res.seq_res,
4344 task);
1da177e4
LT		 4345}
4346
0b7c0153 4347static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4348{
1da177e4 4349 struct inode *inode = data->inode;
14516c3a 4350
cc668ab3 4351 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4352 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4353 NULL, NULL) == -EAGAIN) {
d00c5d43 4354 rpc_restart_call_prepare(task);
788e7a89 4355 return -EAGAIN;
1da177e4 4356 }
788e7a89 4357 return 0;
1da177e4
LT		 4358}
4359
0b7c0153 4360static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4361{
4362 if (!nfs4_sequence_done(task, &data->res.seq_res))
4363 return -EAGAIN;
0b7c0153 4364 return data->commit_done_cb(task, data);
5f452431
FI		 4365}
4366
0b7c0153 4367static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4368{
788e7a89 4369 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4370
0b7c0153
FI		 4371 if (data->commit_done_cb == NULL)
4372 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4373 data->res.server = server;
bdc7f021 4374 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4375 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4376}
4377
9bc4e3ca
CL		 4378struct nfs4_renewdata {
4379 struct nfs_client *client;
4380 unsigned long timestamp;
4381};
4382
1da177e4
LT		 4383/*
4384 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4385 * standalone procedure for queueing an asynchronous RENEW.
4386 */
9bc4e3ca 4387static void nfs4_renew_release(void *calldata)
dc96aef9 4388{
9bc4e3ca
CL		 4389 struct nfs4_renewdata *data = calldata;
4390 struct nfs_client *clp = data->client;
dc96aef9 4391
0851de06
AB		 4392 if (atomic_read(&clp->cl_count) > 1)
4393 nfs4_schedule_state_renewal(clp);
4394 nfs_put_client(clp);
9bc4e3ca 4395 kfree(data);
dc96aef9
AB		 4396}
4397
9bc4e3ca 4398static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4399{
9bc4e3ca
CL		 4400 struct nfs4_renewdata *data = calldata;
4401 struct nfs_client *clp = data->client;
4402 unsigned long timestamp = data->timestamp;
1da177e4 4403
c6d01c6f 4404 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4405 switch (task->tk_status) {
4406 case 0:
4407 break;
4408 case -NFS4ERR_LEASE_MOVED:
4409 nfs4_schedule_lease_moved_recovery(clp);
4410 break;
4411 default:
95baa25c 4412 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4413 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4414 return;
4415 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4416 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4417 return;
4418 }
4419 nfs4_schedule_path_down_recovery(clp);
1da177e4 4420 }
452e9352 4421 do_renew_lease(clp, timestamp);
1da177e4
LT		 4422}
4423
963d8fe5
TM		 4424static const struct rpc_call_ops nfs4_renew_ops = {
4425 .rpc_call_done = nfs4_renew_done,
dc96aef9 4426 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4427};
4428
2f60ea6b 4429static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4430{
4431 struct rpc_message msg = {
4432 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4433 .rpc_argp = clp,
b4454fe1 4434 .rpc_cred = cred,
1da177e4 4435 };
9bc4e3ca 4436 struct nfs4_renewdata *data;
1da177e4 4437
2f60ea6b
TM		 4438 if (renew_flags == 0)
4439 return 0;
0851de06
AB		 4440 if (!atomic_inc_not_zero(&clp->cl_count))
4441 return -EIO;
b569ad34 4442 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4443 if (data == NULL)
4444 return -ENOMEM;
4445 data->client = clp;
4446 data->timestamp = jiffies;
bc7a05ca 4447 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4448 &nfs4_renew_ops, data);
1da177e4
LT		 4449}
4450
8534d4ec 4451static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4452{
4453 struct rpc_message msg = {
4454 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4455 .rpc_argp = clp,
b4454fe1 4456 .rpc_cred = cred,
1da177e4
LT		 4457 };
4458 unsigned long now = jiffies;
4459 int status;
4460
bc7a05ca 4461 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4462 if (status < 0)
4463 return status;
452e9352 4464 do_renew_lease(clp, now);
1da177e4
LT		 4465 return 0;
4466}
4467
aa1870af
BF		 4468static inline int nfs4_server_supports_acls(struct nfs_server *server)
4469{
7dd7d959 4470 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4471}
4472
21f498c2
TM		 4473/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4474 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4475 * the stack.
4476 */
21f498c2 4477#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4478
e9e3d724
NH		 4479static int buf_to_pages_noslab(const void *buf, size_t buflen,
4480 struct page **pages, unsigned int *pgbase)
4481{
4482 struct page *newpage, **spages;
4483 int rc = 0;
4484 size_t len;
4485 spages = pages;
4486
4487 do {
21f498c2 4488 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4489 newpage = alloc_page(GFP_KERNEL);
4490
4491 if (newpage == NULL)
4492 goto unwind;
4493 memcpy(page_address(newpage), buf, len);
4494 buf += len;
4495 buflen -= len;
4496 *pages++ = newpage;
4497 rc++;
4498 } while (buflen != 0);
4499
4500 return rc;
4501
4502unwind:
4503 for(; rc > 0; rc--)
4504 __free_page(spages[rc-1]);
4505 return -ENOMEM;
4506}
4507
e50a1c2e
BF		 4508struct nfs4_cached_acl {
4509 int cached;
4510 size_t len;
3e9d4154 4511 char data[0];
e50a1c2e
BF		 4512};
4513
4514static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4515{
4516 struct nfs_inode *nfsi = NFS_I(inode);
4517
4518 spin_lock(&inode->i_lock);
4519 kfree(nfsi->nfs4_acl);
4520 nfsi->nfs4_acl = acl;
4521 spin_unlock(&inode->i_lock);
4522}
4523
4524static void nfs4_zap_acl_attr(struct inode *inode)
4525{
4526 nfs4_set_cached_acl(inode, NULL);
4527}
4528
4529static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4530{
4531 struct nfs_inode *nfsi = NFS_I(inode);
4532 struct nfs4_cached_acl *acl;
4533 int ret = -ENOENT;
4534
4535 spin_lock(&inode->i_lock);
4536 acl = nfsi->nfs4_acl;
4537 if (acl == NULL)
4538 goto out;
4539 if (buf == NULL) /* user is just asking for length */
4540 goto out_len;
4541 if (acl->cached == 0)
4542 goto out;
4543 ret = -ERANGE; /* see getxattr(2) man page */
4544 if (acl->len > buflen)
4545 goto out;
4546 memcpy(buf, acl->data, acl->len);
4547out_len:
4548 ret = acl->len;
4549out:
4550 spin_unlock(&inode->i_lock);
4551 return ret;
4552}
4553
5794d21e 4554static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4555{
4556 struct nfs4_cached_acl *acl;
b291f1b1 4557 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4558
1f1ea6c2 4559 if (buflen <= PAGE_SIZE) {
b291f1b1 4560 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4561 if (acl == NULL)
4562 goto out;
4563 acl->cached = 1;
5794d21e 4564 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4565 } else {
4566 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4567 if (acl == NULL)
4568 goto out;
4569 acl->cached = 0;
4570 }
4571 acl->len = acl_len;
4572out:
4573 nfs4_set_cached_acl(inode, acl);
4574}
4575
bf118a34
AA		 4576/*
4577 * The getxattr API returns the required buffer length when called with a
4578 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4579 * the required buf. On a NULL buf, we send a page of data to the server
4580 * guessing that the ACL request can be serviced by a page. If so, we cache
4581 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4582 * the cache. If not so, we throw away the page, and cache the required
4583 * length. The next getxattr call will then produce another round trip to
4584 * the server, this time with the input buf of the required size.
4585 */
16b4289c 4586static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4587{
bf118a34 4588 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4589 struct nfs_getaclargs args = {
4590 .fh = NFS_FH(inode),
4591 .acl_pages = pages,
4592 .acl_len = buflen,
4593 };
663c79b3
BH		 4594 struct nfs_getaclres res = {
4595 .acl_len = buflen,
4596 };
aa1870af
BF		 4597 struct rpc_message msg = {
4598 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4599 .rpc_argp = &args,
663c79b3 4600 .rpc_resp = &res,
aa1870af 4601 };
21f498c2
TM		 4602 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4603 int ret = -ENOMEM, i;
aa1870af 4604
bf118a34
AA		 4605 /* As long as we're doing a round trip to the server anyway,
4606 * let's be prepared for a page of acl data. */
4607 if (npages == 0)
4608 npages = 1;
21f498c2
TM		 4609 if (npages > ARRAY_SIZE(pages))
4610 return -ERANGE;
5a006899 4611
bf118a34
AA		 4612 for (i = 0; i < npages; i++) {
4613 pages[i] = alloc_page(GFP_KERNEL);
4614 if (!pages[i])
4615 goto out_free;
e50a1c2e 4616 }
5a006899
SP		 4617
4618 /* for decoding across pages */
4619 res.acl_scratch = alloc_page(GFP_KERNEL);
4620 if (!res.acl_scratch)
4621 goto out_free;
4622
bf118a34
AA		 4623 args.acl_len = npages * PAGE_SIZE;
4624 args.acl_pgbase = 0;
5a006899 4625
de040bec 4626 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4627 __func__, buf, buflen, npages, args.acl_len);
4628 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4629 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4630 if (ret)
4631 goto out_free;
bf118a34 4632
1f1ea6c2
TM		 4633 /* Handle the case where the passed-in buffer is too short */
4634 if (res.acl_flags & NFS4_ACL_TRUNC) {
4635 /* Did the user only issue a request for the acl length? */
4636 if (buf == NULL)
4637 goto out_ok;
e50a1c2e 4638 ret = -ERANGE;
1f1ea6c2 4639 goto out_free;
e50a1c2e 4640 }
1f1ea6c2 4641 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4642 if (buf) {
4643 if (res.acl_len > buflen) {
4644 ret = -ERANGE;
4645 goto out_free;
4646 }
1f1ea6c2 4647 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4648 }
1f1ea6c2
TM		 4649out_ok:
4650 ret = res.acl_len;
e50a1c2e 4651out_free:
bf118a34
AA		 4652 for (i = 0; i < npages; i++)
4653 if (pages[i])
4654 __free_page(pages[i]);
331818f1
TM		 4655 if (res.acl_scratch)
4656 __free_page(res.acl_scratch);
aa1870af
BF		 4657 return ret;
4658}
4659
16b4289c
TM		 4660static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4661{
4662 struct nfs4_exception exception = { };
4663 ssize_t ret;
4664 do {
4665 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4666 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4667 if (ret >= 0)
4668 break;
4669 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4670 } while (exception.retry);
4671 return ret;
4672}
4673
e50a1c2e
BF		 4674static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4675{
4676 struct nfs_server *server = NFS_SERVER(inode);
4677 int ret;
4678
4679 if (!nfs4_server_supports_acls(server))
4680 return -EOPNOTSUPP;
4681 ret = nfs_revalidate_inode(server, inode);
4682 if (ret < 0)
4683 return ret;
08a22b39
AK		 4684 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4685 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4686 ret = nfs4_read_cached_acl(inode, buf, buflen);
4687 if (ret != -ENOENT)
bf118a34
AA		 4688 /* -ENOENT is returned if there is no ACL or if there is an ACL
4689 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4690 return ret;
4691 return nfs4_get_acl_uncached(inode, buf, buflen);
4692}
4693
16b4289c 4694static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4695{
4696 struct nfs_server *server = NFS_SERVER(inode);
4697 struct page *pages[NFS4ACL_MAXPAGES];
4698 struct nfs_setaclargs arg = {
4699 .fh = NFS_FH(inode),
4700 .acl_pages = pages,
4701 .acl_len = buflen,
4702 };
73c403a9 4703 struct nfs_setaclres res;
4b580ee3
BF		 4704 struct rpc_message msg = {
4705 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4706 .rpc_argp = &arg,
73c403a9 4707 .rpc_resp = &res,
4b580ee3 4708 };
21f498c2 4709 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4710 int ret, i;
4b580ee3
BF		 4711
4712 if (!nfs4_server_supports_acls(server))
4713 return -EOPNOTSUPP;
21f498c2
TM		 4714 if (npages > ARRAY_SIZE(pages))
4715 return -ERANGE;
e9e3d724
NH		 4716 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4717 if (i < 0)
4718 return i;
57ec14c5 4719 nfs4_inode_return_delegation(inode);
7c513058 4720 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4721
4722 /*
4723 * Free each page after tx, so the only ref left is
4724 * held by the network stack
4725 */
4726 for (; i > 0; i--)
4727 put_page(pages[i-1]);
4728
08a22b39
AK		 4729 /*
4730 * Acl update can result in inode attribute update.
4731 * so mark the attribute cache invalid.
4732 */
4733 spin_lock(&inode->i_lock);
4734 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4735 spin_unlock(&inode->i_lock);
f41f7418
TM		 4736 nfs_access_zap_cache(inode);
4737 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4738 return ret;
4739}
4740
16b4289c
TM		 4741static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4742{
4743 struct nfs4_exception exception = { };
4744 int err;
4745 do {
c1578b76
TM		 4746 err = __nfs4_proc_set_acl(inode, buf, buflen);
4747 trace_nfs4_set_acl(inode, err);
4748 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4749 &exception);
4750 } while (exception.retry);
4751 return err;
4752}
4753
aa9c2669
DQ		 4754#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4755static int _nfs4_get_security_label(struct inode *inode, void *buf,
4756 size_t buflen)
4757{
4758 struct nfs_server *server = NFS_SERVER(inode);
4759 struct nfs_fattr fattr;
4760 struct nfs4_label label = {0, 0, buflen, buf};
4761
4762 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4763 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4764 .fh = NFS_FH(inode),
4765 .bitmask = bitmask,
4766 };
4767 struct nfs4_getattr_res res = {
4768 .fattr = &fattr,
4769 .label = &label,
4770 .server = server,
4771 };
4772 struct rpc_message msg = {
4773 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4774 .rpc_argp = &arg,
aa9c2669
DQ		 4775 .rpc_resp = &res,
4776 };
4777 int ret;
4778
4779 nfs_fattr_init(&fattr);
4780
fcb63a9b 4781 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4782 if (ret)
4783 return ret;
4784 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4785 return -ENOENT;
4786 if (buflen < label.len)
4787 return -ERANGE;
4788 return 0;
4789}
4790
4791static int nfs4_get_security_label(struct inode *inode, void *buf,
4792 size_t buflen)
4793{
4794 struct nfs4_exception exception = { };
4795 int err;
4796
4797 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4798 return -EOPNOTSUPP;
4799
4800 do {
c1578b76
TM		 4801 err = _nfs4_get_security_label(inode, buf, buflen);
4802 trace_nfs4_get_security_label(inode, err);
4803 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4804 &exception);
4805 } while (exception.retry);
4806 return err;
4807}
4808
4809static int _nfs4_do_set_security_label(struct inode *inode,
4810 struct nfs4_label *ilabel,
4811 struct nfs_fattr *fattr,
4812 struct nfs4_label *olabel)
4813{
4814
4815 struct iattr sattr = {0};
4816 struct nfs_server *server = NFS_SERVER(inode);
4817 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4818 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4819 .fh = NFS_FH(inode),
4820 .iap = &sattr,
4821 .server = server,
4822 .bitmask = bitmask,
4823 .label = ilabel,
4824 };
4825 struct nfs_setattrres res = {
4826 .fattr = fattr,
4827 .label = olabel,
4828 .server = server,
4829 };
4830 struct rpc_message msg = {
4831 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4832 .rpc_argp = &arg,
aa9c2669
DQ		 4833 .rpc_resp = &res,
4834 };
4835 int status;
4836
12207f69 4837 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4838
12207f69 4839 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4840 if (status)
4841 dprintk("%s failed: %d\n", __func__, status);
4842
4843 return status;
4844}
4845
4846static int nfs4_do_set_security_label(struct inode *inode,
4847 struct nfs4_label *ilabel,
4848 struct nfs_fattr *fattr,
4849 struct nfs4_label *olabel)
4850{
4851 struct nfs4_exception exception = { };
4852 int err;
4853
4854 do {
c1578b76
TM		 4855 err = _nfs4_do_set_security_label(inode, ilabel,
4856 fattr, olabel);
4857 trace_nfs4_set_security_label(inode, err);
4858 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4859 &exception);
4860 } while (exception.retry);
4861 return err;
4862}
4863
4864static int
4865nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4866{
4867 struct nfs4_label ilabel, *olabel = NULL;
4868 struct nfs_fattr fattr;
4869 struct rpc_cred *cred;
2b0143b5 4870 struct inode *inode = d_inode(dentry);
aa9c2669
DQ		 4871 int status;
4872
4873 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4874 return -EOPNOTSUPP;
4875
4876 nfs_fattr_init(&fattr);
4877
4878 ilabel.pi = 0;
4879 ilabel.lfs = 0;
4880 ilabel.label = (char *)buf;
4881 ilabel.len = buflen;
4882
4883 cred = rpc_lookup_cred();
4884 if (IS_ERR(cred))
4885 return PTR_ERR(cred);
4886
4887 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4888 if (IS_ERR(olabel)) {
4889 status = -PTR_ERR(olabel);
4890 goto out;
4891 }
4892
4893 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4894 if (status == 0)
4895 nfs_setsecurity(inode, &fattr, olabel);
4896
4897 nfs4_label_free(olabel);
4898out:
4899 put_rpccred(cred);
4900 return status;
4901}
4902#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4903
4904
1da177e4 4905static int
8478eaa1
N		 4906nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4907 struct nfs4_state *state, long *timeout)
1da177e4 4908{
aa5190d0
TM		 4909 struct nfs_client *clp = server->nfs_client;
4910
4911 if (task->tk_status >= 0)
1da177e4
LT		 4912 return 0;
4913 switch(task->tk_status) {
a1d0b5ee 4914 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4915 case -NFS4ERR_ADMIN_REVOKED:
4916 case -NFS4ERR_BAD_STATEID:
4917 case -NFS4ERR_OPENMODE:
4918 if (state == NULL)
4919 break;
5d422301 4920 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4921 goto recovery_failed;
0400a6b0 4922 goto wait_on_recovery;
0ced63d1 4923 case -NFS4ERR_EXPIRED:
5d422301
TM		 4924 if (state != NULL) {
4925 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4926 goto recovery_failed;
5d422301 4927 }
1da177e4 4928 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4929 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4930 nfs4_schedule_lease_recovery(clp);
4931 goto wait_on_recovery;
519ae255
CL		 4932 case -NFS4ERR_MOVED:
4933 if (nfs4_schedule_migration_recovery(server) < 0)
4934 goto recovery_failed;
4935 goto wait_on_recovery;
8ef2f8d4
CL		 4936 case -NFS4ERR_LEASE_MOVED:
4937 nfs4_schedule_lease_moved_recovery(clp);
4938 goto wait_on_recovery;
4745e315
AA		 4939#if defined(CONFIG_NFS_V4_1)
4940 case -NFS4ERR_BADSESSION:
4941 case -NFS4ERR_BADSLOT:
4942 case -NFS4ERR_BAD_HIGH_SLOT:
4943 case -NFS4ERR_DEADSESSION:
4944 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4945 case -NFS4ERR_SEQ_FALSE_RETRY:
4946 case -NFS4ERR_SEQ_MISORDERED:
4947 dprintk("%s ERROR %d, Reset session\n", __func__,
4948 task->tk_status);
9f594791 4949 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 4950 goto wait_on_recovery;
4745e315 4951#endif /* CONFIG_NFS_V4_1 */
1da177e4 4952 case -NFS4ERR_DELAY:
aa5190d0 4953 nfs_inc_server_stats(server, NFSIOS_DELAY);
8478eaa1
N		 4954 rpc_delay(task, nfs4_update_delay(timeout));
4955 goto restart_call;
006ea73e 4956 case -NFS4ERR_GRACE:
1da177e4 4957 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4958 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4959 case -NFS4ERR_OLD_STATEID:
f1478c13 4960 goto restart_call;
1da177e4
LT		 4961 }
4962 task->tk_status = nfs4_map_errors(task->tk_status);
4963 return 0;
9f51a78e 4964recovery_failed:
5d422301
TM		 4965 task->tk_status = -EIO;
4966 return 0;
0400a6b0 4967wait_on_recovery:
a2c0b9e2 4968 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4969 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4970 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4971 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4972 goto recovery_failed;
f1478c13 4973restart_call:
a2c0b9e2
TM		 4974 task->tk_status = 0;
4975 return -EAGAIN;
1da177e4
LT		 4976}
4977
f092075d
CL		 4978static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4979 nfs4_verifier *bootverf)
cd93710e
CL		 4980{
4981 __be32 verf[2];
4982
2c820d9a
CL		 4983 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4984 /* An impossible timestamp guarantees this value
4985 * will never match a generated boot time. */
4986 verf[0] = 0;
17f26b12 4987 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4988 } else {
f092075d 4989 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4990 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4991 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4992 }
cd93710e
CL		 4993 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4994}
4995
a3192688
JL		 4996static int
4997nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 4998{
a3192688
JL		 4999 int result;
5000 size_t len;
5001 char *str;
5002 bool retried = false;
e984a55a 5003
ceb3a16c 5004 if (clp->cl_owner_id != NULL)
a3192688
JL		 5005 return 0;
5006retry:
5007 rcu_read_lock();
5008 len = 10 + strlen(clp->cl_ipaddr) + 1 +
5009 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
5010 1 +
5011 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5012 1;
5013 rcu_read_unlock();
5014
5015 if (len > NFS4_OPAQUE_LIMIT + 1)
5016 return -EINVAL;
5017
5018 /*
5019 * Since this string is allocated at mount time, and held until the
5020 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5021 * about a memory-reclaim deadlock.
5022 */
5023 str = kmalloc(len, GFP_KERNEL);
5024 if (!str)
5025 return -ENOMEM;
ceb3a16c 5026
e984a55a 5027 rcu_read_lock();
a3192688
JL		 5028 result = scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
5029 clp->cl_ipaddr,
5030 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5031 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5032 rcu_read_unlock();
a3192688
JL		 5033
5034 /* Did something change? */
5035 if (result >= len) {
5036 kfree(str);
5037 if (retried)
5038 return -EINVAL;
5039 retried = true;
5040 goto retry;
5041 }
5042 clp->cl_owner_id = str;
5043 return 0;
e984a55a
CL		 5044}
5045
873e3851
JL		 5046static int
5047nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5048{
5049 int result;
5050 size_t len;
5051 char *str;
5052
5053 len = 10 + 10 + 1 + 10 + 1 +
5054 strlen(nfs4_client_id_uniquifier) + 1 +
5055 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5056
5057 if (len > NFS4_OPAQUE_LIMIT + 1)
5058 return -EINVAL;
5059
5060 /*
5061 * Since this string is allocated at mount time, and held until the
5062 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5063 * about a memory-reclaim deadlock.
5064 */
5065 str = kmalloc(len, GFP_KERNEL);
5066 if (!str)
5067 return -ENOMEM;
5068
5069 result = scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
5070 clp->rpc_ops->version, clp->cl_minorversion,
5071 nfs4_client_id_uniquifier,
5072 clp->cl_rpcclient->cl_nodename);
5073 if (result >= len) {
5074 kfree(str);
5075 return -EINVAL;
5076 }
5077 clp->cl_owner_id = str;
5078 return 0;
5079}
5080
5081static int
5082nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5083{
873e3851
JL		 5084 int result;
5085 size_t len;
5086 char *str;
ceb3a16c
TM		 5087
5088 if (clp->cl_owner_id != NULL)
873e3851 5089 return 0;
6f2ea7f2
CL		 5090
5091 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5092 return nfs4_init_uniquifier_client_string(clp);
5093
5094 len = 10 + 10 + 1 + 10 + 1 +
5095 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5096
5097 if (len > NFS4_OPAQUE_LIMIT + 1)
5098 return -EINVAL;
5099
5100 /*
5101 * Since this string is allocated at mount time, and held until the
5102 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5103 * about a memory-reclaim deadlock.
5104 */
5105 str = kmalloc(len, GFP_KERNEL);
5106 if (!str)
5107 return -ENOMEM;
5108
5109 result = scnprintf(str, len, "Linux NFSv%u.%u %s",
5110 clp->rpc_ops->version, clp->cl_minorversion,
5111 clp->cl_rpcclient->cl_nodename);
5112 if (result >= len) {
5113 kfree(str);
5114 return -EINVAL;
5115 }
5116 clp->cl_owner_id = str;
5117 return 0;
e984a55a
CL		 5118}
5119
706cb8db
CL		 5120/*
5121 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5122 * services. Advertise one based on the address family of the
5123 * clientaddr.
5124 */
5125static unsigned int
5126nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5127{
5128 if (strchr(clp->cl_ipaddr, ':') != NULL)
5129 return scnprintf(buf, len, "tcp6");
5130 else
5131 return scnprintf(buf, len, "tcp");
5132}
5133
f11b2a1c
JL		 5134static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5135{
5136 struct nfs4_setclientid *sc = calldata;
5137
5138 if (task->tk_status == 0)
5139 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5140}
5141
5142static const struct rpc_call_ops nfs4_setclientid_ops = {
5143 .rpc_call_done = nfs4_setclientid_done,
5144};
5145
6bbb4ae8
CL		 5146/**
5147 * nfs4_proc_setclientid - Negotiate client ID
5148 * @clp: state data structure
5149 * @program: RPC program for NFSv4 callback service
5150 * @port: IP port number for NFS4 callback service
5151 * @cred: RPC credential to use for this call
5152 * @res: where to place the result
5153 *
5154 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5155 */
bb8b27e5
TM		 5156int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5157 unsigned short port, struct rpc_cred *cred,
5158 struct nfs4_setclientid_res *res)
1da177e4
LT		 5159{
5160 nfs4_verifier sc_verifier;
5161 struct nfs4_setclientid setclientid = {
5162 .sc_verifier = &sc_verifier,
5163 .sc_prog = program,
3a6bb738 5164 .sc_clnt = clp,
1da177e4
LT		 5165 };
5166 struct rpc_message msg = {
5167 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5168 .rpc_argp = &setclientid,
bb8b27e5 5169 .rpc_resp = res,
286d7d6a 5170 .rpc_cred = cred,
1da177e4 5171 };
f11b2a1c
JL		 5172 struct rpc_task *task;
5173 struct rpc_task_setup task_setup_data = {
5174 .rpc_client = clp->cl_rpcclient,
5175 .rpc_message = &msg,
5176 .callback_ops = &nfs4_setclientid_ops,
5177 .callback_data = &setclientid,
5178 .flags = RPC_TASK_TIMEOUT,
5179 };
6bbb4ae8 5180 int status;
1da177e4 5181
de734831 5182 /* nfs_client_id4 */
f092075d 5183 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5184
5185 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5186 status = nfs4_init_uniform_client_string(clp);
5187 else
a3192688 5188 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5189
5190 if (status)
5191 goto out;
3a6bb738 5192
de734831 5193 /* cb_client4 */
706cb8db
CL		 5194 setclientid.sc_netid_len =
5195 nfs4_init_callback_netid(clp,
5196 setclientid.sc_netid,
5197 sizeof(setclientid.sc_netid));
de734831 5198 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5199 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5200 clp->cl_ipaddr, port >> 8, port & 255);
5201
3a6bb738 5202 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5203 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5204 clp->cl_owner_id);
f11b2a1c
JL		 5205 task = rpc_run_task(&task_setup_data);
5206 if (IS_ERR(task)) {
5207 status = PTR_ERR(task);
5208 goto out;
5209 }
5210 status = task->tk_status;
5211 if (setclientid.sc_cred) {
5212 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5213 put_rpccred(setclientid.sc_cred);
5214 }
5215 rpc_put_task(task);
5216out:
c6d01c6f 5217 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5218 dprintk("NFS reply setclientid: %d\n", status);
5219 return status;
1da177e4
LT		 5220}
5221
6bbb4ae8
CL		 5222/**
5223 * nfs4_proc_setclientid_confirm - Confirm client ID
5224 * @clp: state data structure
5225 * @res: result of a previous SETCLIENTID
5226 * @cred: RPC credential to use for this call
5227 *
5228 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5229 */
fd954ae1 5230int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5231 struct nfs4_setclientid_res *arg,
5232 struct rpc_cred *cred)
1da177e4 5233{
1da177e4
LT		 5234 struct rpc_message msg = {
5235 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5236 .rpc_argp = arg,
286d7d6a 5237 .rpc_cred = cred,
1da177e4 5238 };
1da177e4
LT		 5239 int status;
5240
6bbb4ae8
CL		 5241 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5242 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5243 clp->cl_clientid);
1bd714f2 5244 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5245 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5246 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5247 return status;
5248}
5249
fe650407
TM		 5250struct nfs4_delegreturndata {
5251 struct nfs4_delegreturnargs args;
fa178f29 5252 struct nfs4_delegreturnres res;
fe650407
TM		 5253 struct nfs_fh fh;
5254 nfs4_stateid stateid;
26e976a8 5255 unsigned long timestamp;
fa178f29 5256 struct nfs_fattr fattr;
fe650407 5257 int rpc_status;
039b756a
PT		 5258 struct inode *inode;
5259 bool roc;
5260 u32 roc_barrier;
fe650407
TM		 5261};
5262
fe650407
TM		 5263static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5264{
5265 struct nfs4_delegreturndata *data = calldata;
938e1010 5266
14516c3a
TM		 5267 if (!nfs4_sequence_done(task, &data->res.seq_res))
5268 return;
938e1010 5269
ca8acf8d 5270 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5271 switch (task->tk_status) {
79708861 5272 case 0:
fa178f29 5273 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5274 case -NFS4ERR_ADMIN_REVOKED:
5275 case -NFS4ERR_DELEG_REVOKED:
5276 case -NFS4ERR_BAD_STATEID:
5277 case -NFS4ERR_OLD_STATEID:
5278 case -NFS4ERR_STALE_STATEID:
5279 case -NFS4ERR_EXPIRED:
5280 task->tk_status = 0;
039b756a
PT		 5281 if (data->roc)
5282 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5283 break;
79708861 5284 default:
8478eaa1
N		 5285 if (nfs4_async_handle_error(task, data->res.server,
5286 NULL, NULL) == -EAGAIN) {
d00c5d43 5287 rpc_restart_call_prepare(task);
79708861
RL		 5288 return;
5289 }
5290 }
5291 data->rpc_status = task->tk_status;
fe650407
TM		 5292}
5293
5294static void nfs4_delegreturn_release(void *calldata)
5295{
039b756a 5296 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5297 struct inode *inode = data->inode;
039b756a 5298
ea7c38fe
TM		 5299 if (inode) {
5300 if (data->roc)
5301 pnfs_roc_release(inode);
5302 nfs_iput_and_deactive(inode);
5303 }
fe650407
TM		 5304 kfree(calldata);
5305}
5306
938e1010
AA		 5307static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5308{
5309 struct nfs4_delegreturndata *d_data;
5310
5311 d_data = (struct nfs4_delegreturndata *)data;
5312
4ff376fe
TM		 5313 if (d_data->roc)
5314 pnfs_roc_get_barrier(d_data->inode, &d_data->roc_barrier);
039b756a 5315
d9afbd1b
TM		 5316 nfs4_setup_sequence(d_data->res.server,
5317 &d_data->args.seq_args,
5318 &d_data->res.seq_res,
5319 task);
938e1010 5320}
938e1010 5321
c8d149f3 5322static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5323 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5324 .rpc_call_done = nfs4_delegreturn_done,
5325 .rpc_release = nfs4_delegreturn_release,
5326};
5327
e6f81075 5328static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5329{
5330 struct nfs4_delegreturndata *data;
fa178f29 5331 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5332 struct rpc_task *task;
5138fde0
TM		 5333 struct rpc_message msg = {
5334 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5335 .rpc_cred = cred,
5336 };
c970aa85
TM		 5337 struct rpc_task_setup task_setup_data = {
5338 .rpc_client = server->client,
5138fde0 5339 .rpc_message = &msg,
c970aa85
TM		 5340 .callback_ops = &nfs4_delegreturn_ops,
5341 .flags = RPC_TASK_ASYNC,
5342 };
e6f81075 5343 int status = 0;
fe650407 5344
8535b2be 5345 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5346 if (data == NULL)
5347 return -ENOMEM;
a9c92d6b 5348 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5349 data->args.fhandle = &data->fh;
5350 data->args.stateid = &data->stateid;
9e907fec 5351 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5352 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5353 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5354 data->res.fattr = &data->fattr;
5355 data->res.server = server;
5138fde0 5356 nfs_fattr_init(data->res.fattr);
26e976a8 5357 data->timestamp = jiffies;
fe650407 5358 data->rpc_status = 0;
ea7c38fe
TM		 5359 data->inode = nfs_igrab_and_active(inode);
5360 if (data->inode)
5361 data->roc = nfs4_roc(inode);
fe650407 5362
c970aa85 5363 task_setup_data.callback_data = data;
1174dd1f
TM		 5364 msg.rpc_argp = &data->args;
5365 msg.rpc_resp = &data->res;
c970aa85 5366 task = rpc_run_task(&task_setup_data);
7a1218a2 5367 if (IS_ERR(task))
fe650407 5368 return PTR_ERR(task);
e6f81075
TM		 5369 if (!issync)
5370 goto out;
fe650407 5371 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5372 if (status != 0)
5373 goto out;
5374 status = data->rpc_status;
e144cbcc
TM		 5375 if (status == 0)
5376 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5377 else
5378 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5379out:
e6b3c4db 5380 rpc_put_task(task);
fe650407 5381 return status;
1da177e4
LT		 5382}
5383
e6f81075 5384int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5385{
5386 struct nfs_server *server = NFS_SERVER(inode);
5387 struct nfs4_exception exception = { };
5388 int err;
5389 do {
e6f81075 5390 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5391 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5392 switch (err) {
5393 case -NFS4ERR_STALE_STATEID:
5394 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5395 case 0:
5396 return 0;
5397 }
5398 err = nfs4_handle_exception(server, err, &exception);
5399 } while (exception.retry);
5400 return err;
5401}
5402
5403#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5404#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5405
5406/*
5407 * sleep, with exponential backoff, and retry the LOCK operation.
5408 */
5409static unsigned long
5410nfs4_set_lock_task_retry(unsigned long timeout)
5411{
416ad3c9 5412 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5413 timeout <<= 1;
5414 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5415 return NFS4_LOCK_MAXTIMEOUT;
5416 return timeout;
5417}
5418
1da177e4
LT		 5419static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5420{
5421 struct inode *inode = state->inode;
5422 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5423 struct nfs_client *clp = server->nfs_client;
911d1aaf 5424 struct nfs_lockt_args arg = {
1da177e4 5425 .fh = NFS_FH(inode),
911d1aaf 5426 .fl = request,
1da177e4 5427 };
911d1aaf
TM		 5428 struct nfs_lockt_res res = {
5429 .denied = request,
1da177e4
LT		 5430 };
5431 struct rpc_message msg = {
5432 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5433 .rpc_argp = &arg,
5434 .rpc_resp = &res,
5435 .rpc_cred = state->owner->so_cred,
5436 };
1da177e4
LT		 5437 struct nfs4_lock_state *lsp;
5438 int status;
5439
911d1aaf 5440 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5441 status = nfs4_set_lock_state(state, request);
5442 if (status != 0)
5443 goto out;
5444 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5445 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5446 arg.lock_owner.s_dev = server->s_dev;
7c513058 5447 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5448 switch (status) {
5449 case 0:
5450 request->fl_type = F_UNLCK;
5451 break;
5452 case -NFS4ERR_DENIED:
5453 status = 0;
1da177e4 5454 }
70cc6487 5455 request->fl_ops->fl_release_private(request);
a6f951dd 5456 request->fl_ops = NULL;
8d0a8a9d 5457out:
1da177e4
LT		 5458 return status;
5459}
5460
5461static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5462{
5463 struct nfs4_exception exception = { };
5464 int err;
5465
5466 do {
d1b748a5
TM		 5467 err = _nfs4_proc_getlk(state, cmd, request);
5468 trace_nfs4_get_lock(request, state, cmd, err);
5469 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5470 &exception);
5471 } while (exception.retry);
5472 return err;
5473}
5474
83bfff23 5475static int do_vfs_lock(struct inode *inode, struct file_lock *fl)
1da177e4
LT		 5476{
5477 int res = 0;
5478 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5479 case FL_POSIX:
83bfff23 5480 res = posix_lock_inode_wait(inode, fl);
1da177e4
LT		 5481 break;
5482 case FL_FLOCK:
83bfff23 5483 res = flock_lock_inode_wait(inode, fl);
1da177e4
LT		 5484 break;
5485 default:
5486 BUG();
5487 }
1da177e4
LT		 5488 return res;
5489}
5490
faf5f49c 5491struct nfs4_unlockdata {
911d1aaf
TM		 5492 struct nfs_locku_args arg;
5493 struct nfs_locku_res res;
faf5f49c
TM		 5494 struct nfs4_lock_state *lsp;
5495 struct nfs_open_context *ctx;
911d1aaf
TM		 5496 struct file_lock fl;
5497 const struct nfs_server *server;
26e976a8 5498 unsigned long timestamp;
faf5f49c
TM		 5499};
5500
911d1aaf
TM		 5501static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5502 struct nfs_open_context *ctx,
5503 struct nfs4_lock_state *lsp,
5504 struct nfs_seqid *seqid)
5505{
5506 struct nfs4_unlockdata *p;
5507 struct inode *inode = lsp->ls_state->inode;
5508
8535b2be 5509 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5510 if (p == NULL)
5511 return NULL;
5512 p->arg.fh = NFS_FH(inode);
5513 p->arg.fl = &p->fl;
5514 p->arg.seqid = seqid;
c1d51931 5515 p->res.seqid = seqid;
911d1aaf
TM		 5516 p->lsp = lsp;
5517 atomic_inc(&lsp->ls_count);
5518 /* Ensure we don't close file until we're done freeing locks! */
5519 p->ctx = get_nfs_open_context(ctx);
5520 memcpy(&p->fl, fl, sizeof(p->fl));
5521 p->server = NFS_SERVER(inode);
5522 return p;
5523}
5524
06f814a3 5525static void nfs4_locku_release_calldata(void *data)
faf5f49c 5526{
963d8fe5 5527 struct nfs4_unlockdata *calldata = data;
911d1aaf 5528 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5529 nfs4_put_lock_state(calldata->lsp);
5530 put_nfs_open_context(calldata->ctx);
5531 kfree(calldata);
faf5f49c
TM		 5532}
5533
963d8fe5 5534static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5535{
963d8fe5 5536 struct nfs4_unlockdata *calldata = data;
faf5f49c 5537
14516c3a
TM		 5538 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5539 return;
faf5f49c
TM		 5540 switch (task->tk_status) {
5541 case 0:
26e976a8 5542 renew_lease(calldata->server, calldata->timestamp);
83bfff23 5543 do_vfs_lock(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 5544 if (nfs4_update_lock_stateid(calldata->lsp,
5545 &calldata->res.stateid))
5546 break;
9e33bed5
TM		 5547 case -NFS4ERR_BAD_STATEID:
5548 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5549 case -NFS4ERR_STALE_STATEID:
5550 case -NFS4ERR_EXPIRED:
425c1d4e
TM		 5551 if (!nfs4_stateid_match(&calldata->arg.stateid,
5552 &calldata->lsp->ls_stateid))
5553 rpc_restart_call_prepare(task);
faf5f49c
TM		 5554 break;
5555 default:
8478eaa1
N		 5556 if (nfs4_async_handle_error(task, calldata->server,
5557 NULL, NULL) == -EAGAIN)
d00c5d43 5558 rpc_restart_call_prepare(task);
faf5f49c 5559 }
2b1bc308 5560 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5561}
5562
4ce70ada 5563static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5564{
4ce70ada 5565 struct nfs4_unlockdata *calldata = data;
faf5f49c 5566
911d1aaf 5567 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5568 goto out_wait;
425c1d4e 5569 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5570 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5571 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5572 goto out_no_action;
faf5f49c 5573 }
26e976a8 5574 calldata->timestamp = jiffies;
035168ab 5575 if (nfs4_setup_sequence(calldata->server,
a893693c 5576 &calldata->arg.seq_args,
2240a9e2
TM		 5577 &calldata->res.seq_res,
5578 task) != 0)
5579 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5580 return;
5581out_no_action:
5582 task->tk_action = NULL;
5583out_wait:
5584 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5585}
5586
963d8fe5 5587static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5588 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5589 .rpc_call_done = nfs4_locku_done,
06f814a3 5590 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5591};
5592
a5d16a4d
TM		 5593static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5594 struct nfs_open_context *ctx,
5595 struct nfs4_lock_state *lsp,
5596 struct nfs_seqid *seqid)
5597{
5598 struct nfs4_unlockdata *data;
5138fde0
TM		 5599 struct rpc_message msg = {
5600 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5601 .rpc_cred = ctx->cred,
5602 };
c970aa85
TM		 5603 struct rpc_task_setup task_setup_data = {
5604 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5605 .rpc_message = &msg,
c970aa85 5606 .callback_ops = &nfs4_locku_ops,
101070ca 5607 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5608 .flags = RPC_TASK_ASYNC,
5609 };
a5d16a4d 5610
fa940720
WAA		 5611 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5612 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5613
137d6aca
FF		 5614 /* Ensure this is an unlock - when canceling a lock, the
5615 * canceled lock is passed in, and it won't be an unlock.
5616 */
5617 fl->fl_type = F_UNLCK;
5618
a5d16a4d
TM		 5619 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5620 if (data == NULL) {
5621 nfs_free_seqid(seqid);
5622 return ERR_PTR(-ENOMEM);
5623 }
5624
a9c92d6b 5625 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5626 msg.rpc_argp = &data->arg;
5627 msg.rpc_resp = &data->res;
c970aa85
TM		 5628 task_setup_data.callback_data = data;
5629 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5630}
5631
faf5f49c
TM		 5632static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5633{
65b62a29
TM		 5634 struct inode *inode = state->inode;
5635 struct nfs4_state_owner *sp = state->owner;
5636 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5637 struct nfs_seqid *seqid;
1da177e4 5638 struct nfs4_lock_state *lsp;
06f814a3 5639 struct rpc_task *task;
b4019c0e 5640 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 5641 int status = 0;
536ff0f8 5642 unsigned char fl_flags = request->fl_flags;
faf5f49c 5643
8d0a8a9d 5644 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5645 /* Unlock _before_ we do the RPC call */
5646 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5647 /* Exclude nfs_delegation_claim_locks() */
5648 mutex_lock(&sp->so_delegreturn_mutex);
5649 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 5650 down_read(&nfsi->rwsem);
83bfff23 5651 if (do_vfs_lock(inode, request) == -ENOENT) {
19e03c57 5652 up_read(&nfsi->rwsem);
65b62a29 5653 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5654 goto out;
19e03c57
TM		 5655 }
5656 up_read(&nfsi->rwsem);
65b62a29 5657 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5658 if (status != 0)
9b073574
TM		 5659 goto out;
5660 /* Is this a delegated lock? */
8d0a8a9d 5661 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5662 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5663 goto out;
b4019c0e
TM		 5664 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5665 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5666 status = -ENOMEM;
badc76dd 5667 if (IS_ERR(seqid))
9b073574 5668 goto out;
cd3758e3 5669 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5670 status = PTR_ERR(task);
5671 if (IS_ERR(task))
9b073574 5672 goto out;
a5d16a4d 5673 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5674 rpc_put_task(task);
9b073574 5675out:
536ff0f8 5676 request->fl_flags = fl_flags;
d1b748a5 5677 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5678 return status;
5679}
5680
a5d16a4d
TM		 5681struct nfs4_lockdata {
5682 struct nfs_lock_args arg;
5683 struct nfs_lock_res res;
5684 struct nfs4_lock_state *lsp;
5685 struct nfs_open_context *ctx;
5686 struct file_lock fl;
26e976a8 5687 unsigned long timestamp;
a5d16a4d
TM		 5688 int rpc_status;
5689 int cancelled;
66179efe 5690 struct nfs_server *server;
a5d16a4d
TM		 5691};
5692
5693static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5694 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5695 gfp_t gfp_mask)
1da177e4 5696{
a5d16a4d
TM		 5697 struct nfs4_lockdata *p;
5698 struct inode *inode = lsp->ls_state->inode;
1da177e4 5699 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 5700 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 5701
8535b2be 5702 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5703 if (p == NULL)
5704 return NULL;
5705
5706 p->arg.fh = NFS_FH(inode);
5707 p->arg.fl = &p->fl;
8535b2be 5708 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 5709 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 5710 goto out_free;
b4019c0e
TM		 5711 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5712 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 5713 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 5714 goto out_free_seqid;
7539bbab 5715 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5716 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5717 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5718 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5719 p->lsp = lsp;
66179efe 5720 p->server = server;
a5d16a4d
TM		 5721 atomic_inc(&lsp->ls_count);
5722 p->ctx = get_nfs_open_context(ctx);
feaff8e5 5723 get_file(fl->fl_file);
a5d16a4d
TM		 5724 memcpy(&p->fl, fl, sizeof(p->fl));
5725 return p;
2f74c0a0
TM		 5726out_free_seqid:
5727 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5728out_free:
5729 kfree(p);
5730 return NULL;
5731}
5732
5733static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5734{
5735 struct nfs4_lockdata *data = calldata;
5736 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5737
3110ff80 5738 dprintk("%s: begin!\n", __func__);
2f74c0a0 5739 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5740 goto out_wait;
a5d16a4d 5741 /* Do we need to do an open_to_lock_owner? */
6b447539 5742 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 5743 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5744 goto out_release_lock_seqid;
8fe72bac 5745 }
425c1d4e
TM		 5746 nfs4_stateid_copy(&data->arg.open_stateid,
5747 &state->open_stateid);
a5d16a4d 5748 data->arg.new_lock_owner = 1;
c1d51931 5749 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 5750 } else {
2f74c0a0 5751 data->arg.new_lock_owner = 0;
425c1d4e
TM		 5752 nfs4_stateid_copy(&data->arg.lock_stateid,
5753 &data->lsp->ls_stateid);
5754 }
5d422301
TM		 5755 if (!nfs4_valid_open_stateid(state)) {
5756 data->rpc_status = -EBADF;
5757 task->tk_action = NULL;
5758 goto out_release_open_seqid;
5759 }
26e976a8 5760 data->timestamp = jiffies;
035168ab
TM		 5761 if (nfs4_setup_sequence(data->server,
5762 &data->arg.seq_args,
2240a9e2 5763 &data->res.seq_res,
d9afbd1b 5764 task) == 0)
66179efe 5765 return;
5d422301 5766out_release_open_seqid:
2240a9e2
TM		 5767 nfs_release_seqid(data->arg.open_seqid);
5768out_release_lock_seqid:
5769 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5770out_wait:
5771 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5772 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5773}
5774
a5d16a4d
TM		 5775static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5776{
5777 struct nfs4_lockdata *data = calldata;
39071e6f 5778 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 5779
3110ff80 5780 dprintk("%s: begin!\n", __func__);
a5d16a4d 5781
14516c3a
TM		 5782 if (!nfs4_sequence_done(task, &data->res.seq_res))
5783 return;
66179efe 5784
a5d16a4d 5785 data->rpc_status = task->tk_status;
425c1d4e
TM		 5786 switch (task->tk_status) {
5787 case 0:
2b0143b5 5788 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 5789 data->timestamp);
c69899a1
TM		 5790 if (data->arg.new_lock) {
5791 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
83bfff23 5792 if (do_vfs_lock(lsp->ls_state->inode, &data->fl) < 0) {
c69899a1
TM		 5793 rpc_restart_call_prepare(task);
5794 break;
5795 }
5796 }
39071e6f
TM		 5797 if (data->arg.new_lock_owner != 0) {
5798 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5799 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5800 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5801 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5802 rpc_restart_call_prepare(task);
425c1d4e
TM		 5803 break;
5804 case -NFS4ERR_BAD_STATEID:
5805 case -NFS4ERR_OLD_STATEID:
5806 case -NFS4ERR_STALE_STATEID:
5807 case -NFS4ERR_EXPIRED:
5808 if (data->arg.new_lock_owner != 0) {
5809 if (!nfs4_stateid_match(&data->arg.open_stateid,
5810 &lsp->ls_state->open_stateid))
5811 rpc_restart_call_prepare(task);
5812 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5813 &lsp->ls_stateid))
5814 rpc_restart_call_prepare(task);
a5d16a4d 5815 }
3110ff80 5816 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5817}
5818
5819static void nfs4_lock_release(void *calldata)
5820{
5821 struct nfs4_lockdata *data = calldata;
5822
3110ff80 5823 dprintk("%s: begin!\n", __func__);
2f74c0a0 5824 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5825 if (data->cancelled != 0) {
5826 struct rpc_task *task;
5827 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5828 data->arg.lock_seqid);
5829 if (!IS_ERR(task))
bf294b41 5830 rpc_put_task_async(task);
3110ff80 5831 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5832 } else
5833 nfs_free_seqid(data->arg.lock_seqid);
5834 nfs4_put_lock_state(data->lsp);
5835 put_nfs_open_context(data->ctx);
feaff8e5 5836 fput(data->fl.fl_file);
a5d16a4d 5837 kfree(data);
3110ff80 5838 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5839}
5840
5841static const struct rpc_call_ops nfs4_lock_ops = {
5842 .rpc_call_prepare = nfs4_lock_prepare,
5843 .rpc_call_done = nfs4_lock_done,
5844 .rpc_release = nfs4_lock_release,
5845};
5846
2bee72a6
TM		 5847static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5848{
2bee72a6
TM		 5849 switch (error) {
5850 case -NFS4ERR_ADMIN_REVOKED:
5851 case -NFS4ERR_BAD_STATEID:
ecac799a 5852 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5853 if (new_lock_owner != 0 ||
795a88c9 5854 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5855 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5856 break;
5857 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5858 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5859 case -NFS4ERR_EXPIRED:
5860 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5861 };
5862}
5863
afe6c27c 5864static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5865{
5866 struct nfs4_lockdata *data;
5867 struct rpc_task *task;
5138fde0
TM		 5868 struct rpc_message msg = {
5869 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5870 .rpc_cred = state->owner->so_cred,
5871 };
c970aa85
TM		 5872 struct rpc_task_setup task_setup_data = {
5873 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5874 .rpc_message = &msg,
c970aa85 5875 .callback_ops = &nfs4_lock_ops,
101070ca 5876 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5877 .flags = RPC_TASK_ASYNC,
5878 };
a5d16a4d
TM		 5879 int ret;
5880
3110ff80 5881 dprintk("%s: begin!\n", __func__);
cd3758e3 5882 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5883 fl->fl_u.nfs4_fl.owner,
5884 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5885 if (data == NULL)
5886 return -ENOMEM;
5887 if (IS_SETLKW(cmd))
5888 data->arg.block = 1;
a9c92d6b 5889 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5890 msg.rpc_argp = &data->arg;
5891 msg.rpc_resp = &data->res;
c970aa85 5892 task_setup_data.callback_data = data;
8fe72bac
TM		 5893 if (recovery_type > NFS_LOCK_NEW) {
5894 if (recovery_type == NFS_LOCK_RECLAIM)
5895 data->arg.reclaim = NFS_LOCK_RECLAIM;
5896 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 5897 } else
5898 data->arg.new_lock = 1;
c970aa85 5899 task = rpc_run_task(&task_setup_data);
7a1218a2 5900 if (IS_ERR(task))
a5d16a4d 5901 return PTR_ERR(task);
a5d16a4d
TM		 5902 ret = nfs4_wait_for_completion_rpc_task(task);
5903 if (ret == 0) {
5904 ret = data->rpc_status;
2bee72a6
TM		 5905 if (ret)
5906 nfs4_handle_setlk_error(data->server, data->lsp,
5907 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5908 } else
5909 data->cancelled = 1;
e6b3c4db 5910 rpc_put_task(task);
3110ff80 5911 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5912 return ret;
1da177e4
LT		 5913}
5914
5915static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5916{
202b50dc 5917 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5918 struct nfs4_exception exception = {
5919 .inode = state->inode,
5920 };
202b50dc
TM		 5921 int err;
5922
5923 do {
42a2d13e
TM		 5924 /* Cache the lock if possible... */
5925 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5926 return 0;
afe6c27c 5927 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5928 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5929 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5930 break;
5931 nfs4_handle_exception(server, err, &exception);
5932 } while (exception.retry);
5933 return err;
1da177e4
LT		 5934}
5935
5936static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5937{
202b50dc 5938 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5939 struct nfs4_exception exception = {
5940 .inode = state->inode,
5941 };
202b50dc
TM		 5942 int err;
5943
6bfc93ef
TM		 5944 err = nfs4_set_lock_state(state, request);
5945 if (err != 0)
5946 return err;
f6de7a39 5947 if (!recover_lost_locks) {
ef1820f9
N		 5948 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5949 return 0;
5950 }
202b50dc 5951 do {
42a2d13e
TM		 5952 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5953 return 0;
afe6c27c 5954 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5955 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5956 switch (err) {
5957 default:
5958 goto out;
5959 case -NFS4ERR_GRACE:
5960 case -NFS4ERR_DELAY:
5961 nfs4_handle_exception(server, err, &exception);
5962 err = 0;
5963 }
202b50dc 5964 } while (exception.retry);
a9ed2e25 5965out:
202b50dc 5966 return err;
1da177e4
LT		 5967}
5968
f062eb6c 5969#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5970/**
5971 * nfs41_check_expired_locks - possibly free a lock stateid
5972 *
5973 * @state: NFSv4 state for an inode
5974 *
5975 * Returns NFS_OK if recovery for this stateid is now finished.
5976 * Otherwise a negative NFS4ERR value is returned.
5977 */
b01dd1d8 5978static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5979{
eb64cf96 5980 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5981 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5982 struct nfs_server *server = NFS_SERVER(state->inode);
5983
b01dd1d8 5984 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5985 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5986 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5987
5988 status = nfs41_test_stateid(server,
5989 &lsp->ls_stateid,
5990 cred);
08cb47fa 5991 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5992 if (status != NFS_OK) {
3e60ffdd
CL		 5993 /* Free the stateid unless the server
5994 * informs us the stateid is unrecognized. */
89af2739
CL		 5995 if (status != -NFS4ERR_BAD_STATEID)
5996 nfs41_free_stateid(server,
ab7cb0df
TM		 5997 &lsp->ls_stateid,
5998 cred);
795a88c9 5999 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 6000 ret = status;
6001 }
6002 }
6003 };
6004
6005 return ret;
6006}
6007
6008static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
6009{
6010 int status = NFS_OK;
6011
6012 if (test_bit(LK_STATE_IN_USE, &state->flags))
6013 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 6014 if (status != NFS_OK)
6015 status = nfs4_lock_expired(state, request);
6016 return status;
f062eb6c
BS		 6017}
6018#endif
6019
1da177e4
LT		 6020static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6021{
19e03c57 6022 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 6023 unsigned char fl_flags = request->fl_flags;
8e469ebd 6024 int status = -ENOLCK;
1da177e4 6025
8e469ebd
TM		 6026 if ((fl_flags & FL_POSIX) &&
6027 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6028 goto out;
6bfc93ef 6029 /* Is this a delegated open? */
6bfc93ef
TM		 6030 status = nfs4_set_lock_state(state, request);
6031 if (status != 0)
6032 goto out;
01c3b861 6033 request->fl_flags |= FL_ACCESS;
83bfff23 6034 status = do_vfs_lock(state->inode, request);
01c3b861
TM		 6035 if (status < 0)
6036 goto out;
19e03c57 6037 down_read(&nfsi->rwsem);
01c3b861 6038 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6039 /* Yes: cache locks! */
01c3b861 6040 /* ...but avoid races with delegation recall... */
19e03c57 6041 request->fl_flags = fl_flags & ~FL_SLEEP;
83bfff23 6042 status = do_vfs_lock(state->inode, request);
c69899a1 6043 up_read(&nfsi->rwsem);
9a99af49 6044 goto out;
9a99af49 6045 }
19e03c57 6046 up_read(&nfsi->rwsem);
c69899a1 6047 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6048out:
6049 request->fl_flags = fl_flags;
1da177e4
LT		 6050 return status;
6051}
6052
6053static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6054{
a1d0b5ee
TM		 6055 struct nfs4_exception exception = {
6056 .state = state,
05ffe24f 6057 .inode = state->inode,
a1d0b5ee 6058 };
1da177e4
LT		 6059 int err;
6060
6061 do {
965b5d67 6062 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 6063 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 6064 if (err == -NFS4ERR_DENIED)
6065 err = -EAGAIN;
1da177e4 6066 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6067 err, &exception);
1da177e4
LT		 6068 } while (exception.retry);
6069 return err;
6070}
6071
6072static int
6073nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6074{
6075 struct nfs_open_context *ctx;
6076 struct nfs4_state *state;
6077 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6078 int status;
6079
6080 /* verify open state */
cd3758e3 6081 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6082 state = ctx->state;
6083
6084 if (request->fl_start < 0 || request->fl_end < 0)
6085 return -EINVAL;
6086
d953126a
TM		 6087 if (IS_GETLK(cmd)) {
6088 if (state != NULL)
6089 return nfs4_proc_getlk(state, F_GETLK, request);
6090 return 0;
6091 }
1da177e4
LT		 6092
6093 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6094 return -EINVAL;
6095
d953126a
TM		 6096 if (request->fl_type == F_UNLCK) {
6097 if (state != NULL)
6098 return nfs4_proc_unlck(state, cmd, request);
6099 return 0;
6100 }
1da177e4 6101
d953126a
TM		 6102 if (state == NULL)
6103 return -ENOLCK;
55725513
TM		 6104 /*
6105 * Don't rely on the VFS having checked the file open mode,
6106 * since it won't do this for flock() locks.
6107 */
f44106e2 6108 switch (request->fl_type) {
55725513
TM		 6109 case F_RDLCK:
6110 if (!(filp->f_mode & FMODE_READ))
6111 return -EBADF;
6112 break;
6113 case F_WRLCK:
6114 if (!(filp->f_mode & FMODE_WRITE))
6115 return -EBADF;
6116 }
6117
1da177e4
LT		 6118 do {
6119 status = nfs4_proc_setlk(state, cmd, request);
6120 if ((status != -EAGAIN) || IS_SETLK(cmd))
6121 break;
6122 timeout = nfs4_set_lock_task_retry(timeout);
6123 status = -ERESTARTSYS;
6124 if (signalled())
6125 break;
6126 } while(status < 0);
1da177e4
LT		 6127 return status;
6128}
6129
db4f2e63 6130int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6131{
6132 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6133 int err;
6134
6135 err = nfs4_set_lock_state(state, fl);
6136 if (err != 0)
db4f2e63 6137 return err;
4a706fa0 6138 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6139 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6140}
6b3b5496 6141
cf470c3e
TM		 6142struct nfs_release_lockowner_data {
6143 struct nfs4_lock_state *lsp;
5ae67c4f 6144 struct nfs_server *server;
cf470c3e 6145 struct nfs_release_lockowner_args args;
b7e63a10 6146 struct nfs_release_lockowner_res res;
60ea6812 6147 unsigned long timestamp;
cf470c3e
TM		 6148};
6149
fbd4bfd1
CL		 6150static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6151{
6152 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6153 struct nfs_server *server = data->server;
cb04ad2a
PT		 6154 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6155 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6156 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6157 data->timestamp = jiffies;
fbd4bfd1
CL		 6158}
6159
6160static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6161{
6162 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6163 struct nfs_server *server = data->server;
6164
b7e63a10 6165 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6166
6167 switch (task->tk_status) {
6168 case 0:
6169 renew_lease(server, data->timestamp);
6170 break;
6171 case -NFS4ERR_STALE_CLIENTID:
6172 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6173 nfs4_schedule_lease_recovery(server->nfs_client);
6174 break;
60ea6812
CL		 6175 case -NFS4ERR_LEASE_MOVED:
6176 case -NFS4ERR_DELAY:
8478eaa1
N		 6177 if (nfs4_async_handle_error(task, server,
6178 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6179 rpc_restart_call_prepare(task);
6180 }
fbd4bfd1
CL		 6181}
6182
d3c7b7cc
TM		 6183static void nfs4_release_lockowner_release(void *calldata)
6184{
cf470c3e 6185 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6186 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6187 kfree(calldata);
6188}
6189
17280175 6190static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6191 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6192 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6193 .rpc_release = nfs4_release_lockowner_release,
6194};
6195
f1cdae87
JL		 6196static void
6197nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6198{
cf470c3e 6199 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6200 struct rpc_message msg = {
6201 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6202 };
6203
6204 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6205 return;
fbd4bfd1 6206
cf470c3e
TM		 6207 data = kmalloc(sizeof(*data), GFP_NOFS);
6208 if (!data)
f1cdae87 6209 return;
cf470c3e 6210 data->lsp = lsp;
5ae67c4f 6211 data->server = server;
cf470c3e
TM		 6212 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6213 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6214 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6215
cf470c3e 6216 msg.rpc_argp = &data->args;
b7e63a10
TM		 6217 msg.rpc_resp = &data->res;
6218 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6219 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6220}
6221
aa1870af
BF		 6222#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6223
64c2ce8b
AK		 6224static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6225 const void *buf, size_t buflen,
6226 int flags, int type)
6b3b5496 6227{
64c2ce8b
AK		 6228 if (strcmp(key, "") != 0)
6229 return -EINVAL;
4b580ee3 6230
2b0143b5 6231 return nfs4_proc_set_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6232}
6233
64c2ce8b
AK		 6234static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6235 void *buf, size_t buflen, int type)
6b3b5496 6236{
64c2ce8b
AK		 6237 if (strcmp(key, "") != 0)
6238 return -EINVAL;
aa1870af 6239
2b0143b5 6240 return nfs4_proc_get_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6241}
6242
64c2ce8b
AK		 6243static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6244 size_t list_len, const char *name,
6245 size_t name_len, int type)
6b3b5496 6246{
64c2ce8b 6247 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 6248
2b0143b5 6249 if (!nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))))
096455a2 6250 return 0;
64c2ce8b
AK		 6251
6252 if (list && len <= list_len)
6253 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6254 return len;
6b3b5496
BF		 6255}
6256
c9bccef6
DQ		 6257#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6258static inline int nfs4_server_supports_labels(struct nfs_server *server)
6259{
6260 return server->caps & NFS_CAP_SECURITY_LABEL;
6261}
6262
6263static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6264 const void *buf, size_t buflen,
6265 int flags, int type)
6266{
6267 if (security_ismaclabel(key))
6268 return nfs4_set_security_label(dentry, buf, buflen);
6269
6270 return -EOPNOTSUPP;
6271}
6272
6273static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6274 void *buf, size_t buflen, int type)
6275{
6276 if (security_ismaclabel(key))
2b0143b5 6277 return nfs4_get_security_label(d_inode(dentry), buf, buflen);
c9bccef6
DQ		 6278 return -EOPNOTSUPP;
6279}
6280
6281static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6282 size_t list_len, const char *name,
6283 size_t name_len, int type)
6284{
6285 size_t len = 0;
6286
2b0143b5
DH		 6287 if (nfs_server_capable(d_inode(dentry), NFS_CAP_SECURITY_LABEL)) {
6288 len = security_inode_listsecurity(d_inode(dentry), NULL, 0);
c9bccef6 6289 if (list && len <= list_len)
2b0143b5 6290 security_inode_listsecurity(d_inode(dentry), list, len);
c9bccef6
DQ		 6291 }
6292 return len;
6293}
6294
6295static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6296 .prefix = XATTR_SECURITY_PREFIX,
6297 .list = nfs4_xattr_list_nfs4_label,
6298 .get = nfs4_xattr_get_nfs4_label,
6299 .set = nfs4_xattr_set_nfs4_label,
6300};
6301#endif
6302
6303
533eb461
AA		 6304/*
6305 * nfs_fhget will use either the mounted_on_fileid or the fileid
6306 */
69aaaae1
TM		 6307static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6308{
533eb461
AA		 6309 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6310 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6311 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6312 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6313 return;
6314
6315 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6316 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6317 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6318 fattr->nlink = 2;
6319}
6320
f05d147f
BS		 6321static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6322 const struct qstr *name,
6323 struct nfs4_fs_locations *fs_locations,
6324 struct page *page)
683b57b4
TM		 6325{
6326 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6327 u32 bitmask[3] = {
361e624f 6328 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6329 };
6330 struct nfs4_fs_locations_arg args = {
6331 .dir_fh = NFS_FH(dir),
c228fd3a 6332 .name = name,
683b57b4
TM		 6333 .page = page,
6334 .bitmask = bitmask,
6335 };
22958463
BH		 6336 struct nfs4_fs_locations_res res = {
6337 .fs_locations = fs_locations,
6338 };
683b57b4
TM		 6339 struct rpc_message msg = {
6340 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6341 .rpc_argp = &args,
22958463 6342 .rpc_resp = &res,
683b57b4
TM		 6343 };
6344 int status;
6345
3110ff80 6346 dprintk("%s: start\n", __func__);
533eb461
AA		 6347
6348 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6349 * is not supported */
6350 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6351 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6352 else
6353 bitmask[0] |= FATTR4_WORD0_FILEID;
6354
c228fd3a 6355 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6356 fs_locations->server = server;
830b8e33 6357 fs_locations->nlocations = 0;
f05d147f 6358 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6359 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6360 return status;
6361}
6362
f05d147f
BS		 6363int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6364 const struct qstr *name,
6365 struct nfs4_fs_locations *fs_locations,
6366 struct page *page)
db0a9593
BS		 6367{
6368 struct nfs4_exception exception = { };
6369 int err;
6370 do {
078ea3df
TM		 6371 err = _nfs4_proc_fs_locations(client, dir, name,
6372 fs_locations, page);
6373 trace_nfs4_get_fs_locations(dir, name, err);
6374 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6375 &exception);
6376 } while (exception.retry);
6377 return err;
6378}
6379
b03d735b
CL		 6380/*
6381 * This operation also signals the server that this client is
6382 * performing migration recovery. The server can stop returning
6383 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6384 * appended to this compound to identify the client ID which is
6385 * performing recovery.
6386 */
6387static int _nfs40_proc_get_locations(struct inode *inode,
6388 struct nfs4_fs_locations *locations,
6389 struct page *page, struct rpc_cred *cred)
6390{
6391 struct nfs_server *server = NFS_SERVER(inode);
6392 struct rpc_clnt *clnt = server->client;
6393 u32 bitmask[2] = {
6394 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6395 };
6396 struct nfs4_fs_locations_arg args = {
6397 .clientid = server->nfs_client->cl_clientid,
6398 .fh = NFS_FH(inode),
6399 .page = page,
6400 .bitmask = bitmask,
6401 .migration = 1, /* skip LOOKUP */
6402 .renew = 1, /* append RENEW */
6403 };
6404 struct nfs4_fs_locations_res res = {
6405 .fs_locations = locations,
6406 .migration = 1,
6407 .renew = 1,
6408 };
6409 struct rpc_message msg = {
6410 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6411 .rpc_argp = &args,
6412 .rpc_resp = &res,
6413 .rpc_cred = cred,
6414 };
6415 unsigned long now = jiffies;
6416 int status;
6417
6418 nfs_fattr_init(&locations->fattr);
6419 locations->server = server;
6420 locations->nlocations = 0;
6421
6422 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6423 nfs4_set_sequence_privileged(&args.seq_args);
6424 status = nfs4_call_sync_sequence(clnt, server, &msg,
6425 &args.seq_args, &res.seq_res);
6426 if (status)
6427 return status;
6428
6429 renew_lease(server, now);
6430 return 0;
6431}
6432
6433#ifdef CONFIG_NFS_V4_1
6434
6435/*
6436 * This operation also signals the server that this client is
6437 * performing migration recovery. The server can stop asserting
6438 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6439 * performing this operation is identified in the SEQUENCE
6440 * operation in this compound.
6441 *
6442 * When the client supports GETATTR(fs_locations_info), it can
6443 * be plumbed in here.
6444 */
6445static int _nfs41_proc_get_locations(struct inode *inode,
6446 struct nfs4_fs_locations *locations,
6447 struct page *page, struct rpc_cred *cred)
6448{
6449 struct nfs_server *server = NFS_SERVER(inode);
6450 struct rpc_clnt *clnt = server->client;
6451 u32 bitmask[2] = {
6452 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6453 };
6454 struct nfs4_fs_locations_arg args = {
6455 .fh = NFS_FH(inode),
6456 .page = page,
6457 .bitmask = bitmask,
6458 .migration = 1, /* skip LOOKUP */
6459 };
6460 struct nfs4_fs_locations_res res = {
6461 .fs_locations = locations,
6462 .migration = 1,
6463 };
6464 struct rpc_message msg = {
6465 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6466 .rpc_argp = &args,
6467 .rpc_resp = &res,
6468 .rpc_cred = cred,
6469 };
6470 int status;
6471
6472 nfs_fattr_init(&locations->fattr);
6473 locations->server = server;
6474 locations->nlocations = 0;
6475
6476 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6477 nfs4_set_sequence_privileged(&args.seq_args);
6478 status = nfs4_call_sync_sequence(clnt, server, &msg,
6479 &args.seq_args, &res.seq_res);
6480 if (status == NFS4_OK &&
6481 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6482 status = -NFS4ERR_LEASE_MOVED;
6483 return status;
6484}
6485
6486#endif /* CONFIG_NFS_V4_1 */
6487
6488/**
6489 * nfs4_proc_get_locations - discover locations for a migrated FSID
6490 * @inode: inode on FSID that is migrating
6491 * @locations: result of query
6492 * @page: buffer
6493 * @cred: credential to use for this operation
6494 *
6495 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6496 * operation failed, or a negative errno if a local error occurred.
6497 *
6498 * On success, "locations" is filled in, but if the server has
6499 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6500 * asserted.
6501 *
6502 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6503 * from this client that require migration recovery.
6504 */
6505int nfs4_proc_get_locations(struct inode *inode,
6506 struct nfs4_fs_locations *locations,
6507 struct page *page, struct rpc_cred *cred)
6508{
6509 struct nfs_server *server = NFS_SERVER(inode);
6510 struct nfs_client *clp = server->nfs_client;
6511 const struct nfs4_mig_recovery_ops *ops =
6512 clp->cl_mvops->mig_recovery_ops;
6513 struct nfs4_exception exception = { };
6514 int status;
6515
6516 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6517 (unsigned long long)server->fsid.major,
6518 (unsigned long long)server->fsid.minor,
6519 clp->cl_hostname);
6520 nfs_display_fhandle(NFS_FH(inode), __func__);
6521
6522 do {
6523 status = ops->get_locations(inode, locations, page, cred);
6524 if (status != -NFS4ERR_DELAY)
6525 break;
6526 nfs4_handle_exception(server, status, &exception);
6527 } while (exception.retry);
6528 return status;
6529}
6530
44c99933
CL		 6531/*
6532 * This operation also signals the server that this client is
6533 * performing "lease moved" recovery. The server can stop
6534 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6535 * is appended to this compound to identify the client ID which is
6536 * performing recovery.
6537 */
6538static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6539{
6540 struct nfs_server *server = NFS_SERVER(inode);
6541 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6542 struct rpc_clnt *clnt = server->client;
6543 struct nfs4_fsid_present_arg args = {
6544 .fh = NFS_FH(inode),
6545 .clientid = clp->cl_clientid,
6546 .renew = 1, /* append RENEW */
6547 };
6548 struct nfs4_fsid_present_res res = {
6549 .renew = 1,
6550 };
6551 struct rpc_message msg = {
6552 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6553 .rpc_argp = &args,
6554 .rpc_resp = &res,
6555 .rpc_cred = cred,
6556 };
6557 unsigned long now = jiffies;
6558 int status;
6559
6560 res.fh = nfs_alloc_fhandle();
6561 if (res.fh == NULL)
6562 return -ENOMEM;
6563
6564 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6565 nfs4_set_sequence_privileged(&args.seq_args);
6566 status = nfs4_call_sync_sequence(clnt, server, &msg,
6567 &args.seq_args, &res.seq_res);
6568 nfs_free_fhandle(res.fh);
6569 if (status)
6570 return status;
6571
6572 do_renew_lease(clp, now);
6573 return 0;
6574}
6575
6576#ifdef CONFIG_NFS_V4_1
6577
6578/*
6579 * This operation also signals the server that this client is
6580 * performing "lease moved" recovery. The server can stop asserting
6581 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6582 * this operation is identified in the SEQUENCE operation in this
6583 * compound.
6584 */
6585static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6586{
6587 struct nfs_server *server = NFS_SERVER(inode);
6588 struct rpc_clnt *clnt = server->client;
6589 struct nfs4_fsid_present_arg args = {
6590 .fh = NFS_FH(inode),
6591 };
6592 struct nfs4_fsid_present_res res = {
6593 };
6594 struct rpc_message msg = {
6595 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6596 .rpc_argp = &args,
6597 .rpc_resp = &res,
6598 .rpc_cred = cred,
6599 };
6600 int status;
6601
6602 res.fh = nfs_alloc_fhandle();
6603 if (res.fh == NULL)
6604 return -ENOMEM;
6605
6606 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6607 nfs4_set_sequence_privileged(&args.seq_args);
6608 status = nfs4_call_sync_sequence(clnt, server, &msg,
6609 &args.seq_args, &res.seq_res);
6610 nfs_free_fhandle(res.fh);
6611 if (status == NFS4_OK &&
6612 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6613 status = -NFS4ERR_LEASE_MOVED;
6614 return status;
6615}
6616
6617#endif /* CONFIG_NFS_V4_1 */
6618
6619/**
6620 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6621 * @inode: inode on FSID to check
6622 * @cred: credential to use for this operation
6623 *
6624 * Server indicates whether the FSID is present, moved, or not
6625 * recognized. This operation is necessary to clear a LEASE_MOVED
6626 * condition for this client ID.
6627 *
6628 * Returns NFS4_OK if the FSID is present on this server,
6629 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6630 * NFS4ERR code if some error occurred on the server, or a
6631 * negative errno if a local failure occurred.
6632 */
6633int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6634{
6635 struct nfs_server *server = NFS_SERVER(inode);
6636 struct nfs_client *clp = server->nfs_client;
6637 const struct nfs4_mig_recovery_ops *ops =
6638 clp->cl_mvops->mig_recovery_ops;
6639 struct nfs4_exception exception = { };
6640 int status;
6641
6642 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6643 (unsigned long long)server->fsid.major,
6644 (unsigned long long)server->fsid.minor,
6645 clp->cl_hostname);
6646 nfs_display_fhandle(NFS_FH(inode), __func__);
6647
6648 do {
6649 status = ops->fsid_present(inode, cred);
6650 if (status != -NFS4ERR_DELAY)
6651 break;
6652 nfs4_handle_exception(server, status, &exception);
6653 } while (exception.retry);
6654 return status;
6655}
6656
5ec16a85 6657/**
a5250def
WAA		 6658 * If 'use_integrity' is true and the state managment nfs_client
6659 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6660 * and the machine credential as per RFC3530bis and RFC5661 Security
6661 * Considerations sections. Otherwise, just use the user cred with the
6662 * filesystem's rpc_client.
5ec16a85 6663 */
a5250def 6664static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6665{
6666 int status;
6667 struct nfs4_secinfo_arg args = {
6668 .dir_fh = NFS_FH(dir),
6669 .name = name,
6670 };
6671 struct nfs4_secinfo_res res = {
6672 .flavors = flavors,
6673 };
6674 struct rpc_message msg = {
6675 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6676 .rpc_argp = &args,
6677 .rpc_resp = &res,
6678 };
a5250def 6679 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6680 struct rpc_cred *cred = NULL;
a5250def
WAA		 6681
6682 if (use_integrity) {
6683 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6684 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6685 msg.rpc_cred = cred;
a5250def 6686 }
5a5ea0d4
BS		 6687
6688 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6689
6690 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6691 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6692
a5250def
WAA		 6693 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6694 &res.seq_res, 0);
5a5ea0d4 6695 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6696
7cb852df
WAA		 6697 if (cred)
6698 put_rpccred(cred);
a5250def 6699
5a5ea0d4
BS		 6700 return status;
6701}
6702
72de53ec
BS		 6703int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6704 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6705{
6706 struct nfs4_exception exception = { };
6707 int err;
6708 do {
a5250def
WAA		 6709 err = -NFS4ERR_WRONGSEC;
6710
6711 /* try to use integrity protection with machine cred */
6712 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6713 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6714
6715 /*
6716 * if unable to use integrity protection, or SECINFO with
6717 * integrity protection returns NFS4ERR_WRONGSEC (which is
6718 * disallowed by spec, but exists in deployed servers) use
6719 * the current filesystem's rpc_client and the user cred.
6720 */
6721 if (err == -NFS4ERR_WRONGSEC)
6722 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6723
078ea3df
TM		 6724 trace_nfs4_secinfo(dir, name, err);
6725 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6726 &exception);
6727 } while (exception.retry);
6728 return err;
6729}
6730
557134a3 6731#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6732/*
6733 * Check the exchange flags returned by the server for invalid flags, having
6734 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6735 * DS flags set.
6736 */
6737static int nfs4_check_cl_exchange_flags(u32 flags)
6738{
6739 if (flags & ~EXCHGID4_FLAG_MASK_R)
6740 goto out_inval;
6741 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6742 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6743 goto out_inval;
6744 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6745 goto out_inval;
6746 return NFS_OK;
6747out_inval:
6748 return -NFS4ERR_INVAL;
6749}
6750
78fe0f41 6751static bool
79d4e1f0
CL		 6752nfs41_same_server_scope(struct nfs41_server_scope *a,
6753 struct nfs41_server_scope *b)
78fe0f41
WAA		 6754{
6755 if (a->server_scope_sz == b->server_scope_sz &&
6756 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6757 return true;
6758
6759 return false;
6760}
6761
7c44f1ae
WAA		 6762/*
6763 * nfs4_proc_bind_conn_to_session()
6764 *
6765 * The 4.1 client currently uses the same TCP connection for the
6766 * fore and backchannel.
6767 */
2cf047c9 6768int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6769{
6770 int status;
71a097c6
TM		 6771 struct nfs41_bind_conn_to_session_args args = {
6772 .client = clp,
6773 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6774 };
7c44f1ae
WAA		 6775 struct nfs41_bind_conn_to_session_res res;
6776 struct rpc_message msg = {
6777 .rpc_proc =
6778 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 6779 .rpc_argp = &args,
7c44f1ae 6780 .rpc_resp = &res,
2cf047c9 6781 .rpc_cred = cred,
7c44f1ae
WAA		 6782 };
6783
6784 dprintk("--> %s\n", __func__);
7c44f1ae 6785
71a097c6
TM		 6786 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6787 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6788 args.dir = NFS4_CDFC4_FORE;
7c44f1ae
WAA		 6789
6790 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6791 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 6792 if (status == 0) {
71a097c6 6793 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 6794 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6795 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6796 status = -EIO;
71a097c6 6797 goto out;
7c44f1ae 6798 }
71a097c6 6799 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 6800 dprintk("NFS: %s: Unexpected direction from server\n",
6801 __func__);
6802 status = -EIO;
71a097c6 6803 goto out;
7c44f1ae 6804 }
71a097c6 6805 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 6806 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6807 __func__);
6808 status = -EIO;
71a097c6 6809 goto out;
7c44f1ae
WAA		 6810 }
6811 }
7c44f1ae
WAA		 6812out:
6813 dprintk("<-- %s status= %d\n", __func__, status);
6814 return status;
6815}
6816
99fe60d0 6817/*
fa940720
WAA		 6818 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6819 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6820 */
6821static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6822 .how = SP4_MACH_CRED,
6823 .enforce.u.words = {
6824 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6825 1 << (OP_EXCHANGE_ID - 32) |
6826 1 << (OP_CREATE_SESSION - 32) |
6827 1 << (OP_DESTROY_SESSION - 32) |
6828 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6829 },
6830 .allow.u.words = {
6831 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6832 1 << (OP_LOCKU) |
6833 1 << (OP_COMMIT),
8b5bee2e 6834 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6835 1 << (OP_SECINFO_NO_NAME - 32) |
6836 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6837 1 << (OP_FREE_STATEID - 32) |
6838 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6839 }
6840};
6841
6842/*
6843 * Select the state protection mode for client `clp' given the server results
6844 * from exchange_id in `sp'.
99fe60d0 6845 *
2031cd1a
WAA		 6846 * Returns 0 on success, negative errno otherwise.
6847 */
6848static int nfs4_sp4_select_mode(struct nfs_client *clp,
6849 struct nfs41_state_protection *sp)
6850{
6851 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6852 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6853 1 << (OP_EXCHANGE_ID - 32) |
6854 1 << (OP_CREATE_SESSION - 32) |
6855 1 << (OP_DESTROY_SESSION - 32) |
6856 1 << (OP_DESTROY_CLIENTID - 32)
6857 };
6858 unsigned int i;
6859
6860 if (sp->how == SP4_MACH_CRED) {
6861 /* Print state protect result */
6862 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6863 for (i = 0; i <= LAST_NFS4_OP; i++) {
6864 if (test_bit(i, sp->enforce.u.longs))
6865 dfprintk(MOUNT, " enforce op %d\n", i);
6866 if (test_bit(i, sp->allow.u.longs))
6867 dfprintk(MOUNT, " allow op %d\n", i);
6868 }
6869
6870 /* make sure nothing is on enforce list that isn't supported */
6871 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6872 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6873 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6874 return -EINVAL;
6875 }
6876 }
6877
6878 /*
6879 * Minimal mode - state operations are allowed to use machine
6880 * credential. Note this already happens by default, so the
6881 * client doesn't have to do anything more than the negotiation.
6882 *
6883 * NOTE: we don't care if EXCHANGE_ID is in the list -
6884 * we're already using the machine cred for exchange_id
6885 * and will never use a different cred.
6886 */
6887 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6888 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6889 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6890 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6891 dfprintk(MOUNT, "sp4_mach_cred:\n");
6892 dfprintk(MOUNT, " minimal mode enabled\n");
6893 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6894 } else {
6895 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6896 return -EINVAL;
6897 }
fa940720
WAA		 6898
6899 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6900 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6901 dfprintk(MOUNT, " cleanup mode enabled\n");
6902 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6903 }
8b5bee2e
WAA		 6904
6905 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6906 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6907 dfprintk(MOUNT, " secinfo mode enabled\n");
6908 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6909 }
3787d506
WAA		 6910
6911 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6912 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6913 dfprintk(MOUNT, " stateid mode enabled\n");
6914 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6915 }
8c21c62c
WAA		 6916
6917 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6918 dfprintk(MOUNT, " write mode enabled\n");
6919 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6920 }
6921
6922 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6923 dfprintk(MOUNT, " commit mode enabled\n");
6924 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6925 }
2031cd1a
WAA		 6926 }
6927
6928 return 0;
6929}
6930
6931/*
6932 * _nfs4_proc_exchange_id()
6bbb4ae8 6933 *
2031cd1a 6934 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6935 */
2031cd1a
WAA		 6936static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6937 u32 sp4_how)
99fe60d0
BH		 6938{
6939 nfs4_verifier verifier;
6940 struct nfs41_exchange_id_args args = {
cd93710e 6941 .verifier = &verifier,
99fe60d0 6942 .client = clp,
cd3fadec 6943#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6944 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6945 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6946 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6947#else
6948 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6949 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6950#endif
99fe60d0
BH		 6951 };
6952 struct nfs41_exchange_id_res res = {
32b01310 6953 0
99fe60d0
BH		 6954 };
6955 int status;
6956 struct rpc_message msg = {
6957 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6958 .rpc_argp = &args,
6959 .rpc_resp = &res,
6960 .rpc_cred = cred,
6961 };
99fe60d0 6962
f092075d 6963 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 6964
6965 status = nfs4_init_uniform_client_string(clp);
6966 if (status)
3a6bb738 6967 goto out;
3a6bb738
JL		 6968
6969 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6bbb4ae8 6970 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 6971 clp->cl_owner_id);
99fe60d0 6972
acdeb69d 6973 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6974 GFP_NOFS);
acdeb69d 6975 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6976 status = -ENOMEM;
6977 goto out;
6978 }
78fe0f41 6979
79d4e1f0 6980 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6981 GFP_NOFS);
177313f1 6982 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6983 status = -ENOMEM;
acdeb69d 6984 goto out_server_owner;
abe9a6d5 6985 }
78fe0f41 6986
bbafffd2 6987 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6988 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6989 status = -ENOMEM;
6990 goto out_server_scope;
6991 }
6992
2031cd1a
WAA		 6993 switch (sp4_how) {
6994 case SP4_NONE:
6995 args.state_protect.how = SP4_NONE;
6996 break;
6997
6998 case SP4_MACH_CRED:
6999 args.state_protect = nfs4_sp4_mach_cred_request;
7000 break;
7001
7002 default:
7003 /* unsupported! */
7004 WARN_ON_ONCE(1);
7005 status = -EINVAL;
6b55970b 7006 goto out_impl_id;
2031cd1a
WAA		 7007 }
7008
1bd714f2 7009 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7010 trace_nfs4_exchange_id(clp, status);
177313f1 7011 if (status == 0)
32b01310 7012 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 7013
2031cd1a
WAA		 7014 if (status == 0)
7015 status = nfs4_sp4_select_mode(clp, &res.state_protect);
7016
acdeb69d 7017 if (status == 0) {
32b01310 7018 clp->cl_clientid = res.clientid;
e11259f9
TM		 7019 clp->cl_exchange_flags = res.flags;
7020 /* Client ID is not confirmed */
7021 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7022 clear_bit(NFS4_SESSION_ESTABLISHED,
7023 &clp->cl_session->session_state);
32b01310 7024 clp->cl_seqid = res.seqid;
e11259f9 7025 }
32b01310 7026
acdeb69d
CL		 7027 kfree(clp->cl_serverowner);
7028 clp->cl_serverowner = res.server_owner;
7029 res.server_owner = NULL;
78fe0f41 7030
7d2ed9ac 7031 /* use the most recent implementation id */
59155546
CL		 7032 kfree(clp->cl_implid);
7033 clp->cl_implid = res.impl_id;
6b55970b 7034 res.impl_id = NULL;
7d2ed9ac 7035
177313f1 7036 if (clp->cl_serverscope != NULL &&
79d4e1f0 7037 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 7038 res.server_scope)) {
7039 dprintk("%s: server_scope mismatch detected\n",
7040 __func__);
7041 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 7042 kfree(clp->cl_serverscope);
7043 clp->cl_serverscope = NULL;
78fe0f41
WAA		 7044 }
7045
177313f1 7046 if (clp->cl_serverscope == NULL) {
79d4e1f0 7047 clp->cl_serverscope = res.server_scope;
6b55970b 7048 res.server_scope = NULL;
abe9a6d5 7049 }
6b55970b 7050 }
7d2ed9ac 7051
6b55970b
KM		 7052out_impl_id:
7053 kfree(res.impl_id);
7d2ed9ac 7054out_server_scope:
abe9a6d5 7055 kfree(res.server_scope);
6b55970b
KM		 7056out_server_owner:
7057 kfree(res.server_owner);
abe9a6d5 7058out:
177313f1 7059 if (clp->cl_implid != NULL)
6bbb4ae8 7060 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 7061 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 7062 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 7063 clp->cl_implid->date.seconds,
7064 clp->cl_implid->date.nseconds);
6bbb4ae8 7065 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 7066 return status;
7067}
7068
2031cd1a
WAA		 7069/*
7070 * nfs4_proc_exchange_id()
7071 *
7072 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7073 *
7074 * Since the clientid has expired, all compounds using sessions
7075 * associated with the stale clientid will be returning
7076 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7077 * be in some phase of session reset.
7078 *
7079 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7080 */
7081int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7082{
7083 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7084 int status;
7085
7086 /* try SP4_MACH_CRED if krb5i/p */
7087 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7088 authflavor == RPC_AUTH_GSS_KRB5P) {
7089 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
7090 if (!status)
7091 return 0;
7092 }
7093
7094 /* try SP4_NONE */
7095 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
7096}
7097
66245539
TM		 7098static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7099 struct rpc_cred *cred)
7100{
7101 struct rpc_message msg = {
7102 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7103 .rpc_argp = clp,
7104 .rpc_cred = cred,
7105 };
7106 int status;
7107
7108 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7109 trace_nfs4_destroy_clientid(clp, status);
66245539 7110 if (status)
02c67525 7111 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7112 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7113 return status;
7114}
7115
7116static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7117 struct rpc_cred *cred)
7118{
7119 unsigned int loop;
7120 int ret;
7121
7122 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7123 ret = _nfs4_proc_destroy_clientid(clp, cred);
7124 switch (ret) {
7125 case -NFS4ERR_DELAY:
7126 case -NFS4ERR_CLIENTID_BUSY:
7127 ssleep(1);
7128 break;
7129 default:
7130 return ret;
7131 }
7132 }
7133 return 0;
7134}
7135
7136int nfs4_destroy_clientid(struct nfs_client *clp)
7137{
7138 struct rpc_cred *cred;
7139 int ret = 0;
7140
7141 if (clp->cl_mvops->minor_version < 1)
7142 goto out;
7143 if (clp->cl_exchange_flags == 0)
7144 goto out;
05f4c350
CL		 7145 if (clp->cl_preserve_clid)
7146 goto out;
73d8bde5 7147 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7148 ret = nfs4_proc_destroy_clientid(clp, cred);
7149 if (cred)
7150 put_rpccred(cred);
7151 switch (ret) {
7152 case 0:
7153 case -NFS4ERR_STALE_CLIENTID:
7154 clp->cl_exchange_flags = 0;
7155 }
7156out:
7157 return ret;
7158}
7159
2050f0cc
AA		 7160struct nfs4_get_lease_time_data {
7161 struct nfs4_get_lease_time_args *args;
7162 struct nfs4_get_lease_time_res *res;
7163 struct nfs_client *clp;
7164};
7165
7166static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7167 void *calldata)
7168{
2050f0cc
AA		 7169 struct nfs4_get_lease_time_data *data =
7170 (struct nfs4_get_lease_time_data *)calldata;
7171
7172 dprintk("--> %s\n", __func__);
7173 /* just setup sequence, do not trigger session recovery
7174 since we're invoked within one */
d9afbd1b
TM		 7175 nfs41_setup_sequence(data->clp->cl_session,
7176 &data->args->la_seq_args,
7177 &data->res->lr_seq_res,
7178 task);
2050f0cc
AA		 7179 dprintk("<-- %s\n", __func__);
7180}
7181
7182/*
7183 * Called from nfs4_state_manager thread for session setup, so don't recover
7184 * from sequence operation or clientid errors.
7185 */
7186static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7187{
7188 struct nfs4_get_lease_time_data *data =
7189 (struct nfs4_get_lease_time_data *)calldata;
7190
7191 dprintk("--> %s\n", __func__);
14516c3a
TM		 7192 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7193 return;
2050f0cc
AA		 7194 switch (task->tk_status) {
7195 case -NFS4ERR_DELAY:
7196 case -NFS4ERR_GRACE:
7197 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7198 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7199 task->tk_status = 0;
a8a4ae3a
AA		 7200 /* fall through */
7201 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7202 rpc_restart_call_prepare(task);
2050f0cc
AA		 7203 return;
7204 }
2050f0cc
AA		 7205 dprintk("<-- %s\n", __func__);
7206}
7207
17280175 7208static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7209 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7210 .rpc_call_done = nfs4_get_lease_time_done,
7211};
7212
7213int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7214{
7215 struct rpc_task *task;
7216 struct nfs4_get_lease_time_args args;
7217 struct nfs4_get_lease_time_res res = {
7218 .lr_fsinfo = fsinfo,
7219 };
7220 struct nfs4_get_lease_time_data data = {
7221 .args = &args,
7222 .res = &res,
7223 .clp = clp,
7224 };
7225 struct rpc_message msg = {
7226 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7227 .rpc_argp = &args,
7228 .rpc_resp = &res,
7229 };
7230 struct rpc_task_setup task_setup = {
7231 .rpc_client = clp->cl_rpcclient,
7232 .rpc_message = &msg,
7233 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7234 .callback_data = &data,
7235 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7236 };
7237 int status;
7238
a9c92d6b 7239 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7240 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7241 dprintk("--> %s\n", __func__);
7242 task = rpc_run_task(&task_setup);
7243
7244 if (IS_ERR(task))
7245 status = PTR_ERR(task);
7246 else {
7247 status = task->tk_status;
7248 rpc_put_task(task);
7249 }
7250 dprintk("<-- %s return %d\n", __func__, status);
7251
7252 return status;
7253}
7254
fc931582
AA		 7255/*
7256 * Initialize the values to be used by the client in CREATE_SESSION
7257 * If nfs4_init_session set the fore channel request and response sizes,
7258 * use them.
7259 *
7260 * Set the back channel max_resp_sz_cached to zero to force the client to
7261 * always set csa_cachethis to FALSE because the current implementation
7262 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7263 */
7264static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7265{
18aad3d5
AA		 7266 unsigned int max_rqst_sz, max_resp_sz;
7267
7268 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7269 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7270
fc931582 7271 /* Fore channel attributes */
18aad3d5
AA		 7272 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7273 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7274 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7275 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7276
7277 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7278 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7279 __func__,
7280 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7281 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7282
7283 /* Back channel attributes */
fc931582
AA		 7284 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7285 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7286 args->bc_attrs.max_resp_sz_cached = 0;
7287 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7288 args->bc_attrs.max_reqs = 1;
7289
7290 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7291 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7292 __func__,
7293 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7294 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7295 args->bc_attrs.max_reqs);
7296}
7297
79969dd1
TM		 7298static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7299 struct nfs41_create_session_res *res)
8d35301d 7300{
43c2e885 7301 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7302 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7303
43c2e885
BF		 7304 if (rcvd->max_resp_sz > sent->max_resp_sz)
7305 return -EINVAL;
7306 /*
7307 * Our requested max_ops is the minimum we need; we're not
7308 * prepared to break up compounds into smaller pieces than that.
7309 * So, no point even trying to continue if the server won't
7310 * cooperate:
7311 */
7312 if (rcvd->max_ops < sent->max_ops)
7313 return -EINVAL;
7314 if (rcvd->max_reqs == 0)
7315 return -EINVAL;
b4b9a0c1
VG		 7316 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7317 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7318 return 0;
8d35301d
AA		 7319}
7320
79969dd1
TM		 7321static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7322 struct nfs41_create_session_res *res)
43c2e885
BF		 7323{
7324 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7325 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7326
b1c0df5f
TM		 7327 if (!(res->flags & SESSION4_BACK_CHAN))
7328 goto out;
43c2e885
BF		 7329 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7330 return -EINVAL;
7331 if (rcvd->max_resp_sz < sent->max_resp_sz)
7332 return -EINVAL;
7333 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7334 return -EINVAL;
7335 /* These would render the backchannel useless: */
b4b9a0c1 7336 if (rcvd->max_ops != sent->max_ops)
43c2e885 7337 return -EINVAL;
b4b9a0c1 7338 if (rcvd->max_reqs != sent->max_reqs)
43c2e885 7339 return -EINVAL;
b1c0df5f 7340out:
43c2e885
BF		 7341 return 0;
7342}
8d35301d 7343
8d35301d 7344static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7345 struct nfs41_create_session_res *res)
8d35301d 7346{
43c2e885 7347 int ret;
8d35301d 7348
79969dd1 7349 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7350 if (ret)
7351 return ret;
79969dd1
TM		 7352 return nfs4_verify_back_channel_attrs(args, res);
7353}
7354
7355static void nfs4_update_session(struct nfs4_session *session,
7356 struct nfs41_create_session_res *res)
7357{
7358 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7359 /* Mark client id and session as being confirmed */
7360 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7361 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7362 session->flags = res->flags;
7363 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7364 if (res->flags & SESSION4_BACK_CHAN)
7365 memcpy(&session->bc_attrs, &res->bc_attrs,
7366 sizeof(session->bc_attrs));
8d35301d
AA		 7367}
7368
848f5bda
TM		 7369static int _nfs4_proc_create_session(struct nfs_client *clp,
7370 struct rpc_cred *cred)
fc931582
AA		 7371{
7372 struct nfs4_session *session = clp->cl_session;
7373 struct nfs41_create_session_args args = {
7374 .client = clp,
79969dd1
TM		 7375 .clientid = clp->cl_clientid,
7376 .seqid = clp->cl_seqid,
fc931582
AA		 7377 .cb_program = NFS4_CALLBACK,
7378 };
79969dd1
TM		 7379 struct nfs41_create_session_res res;
7380
fc931582
AA		 7381 struct rpc_message msg = {
7382 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7383 .rpc_argp = &args,
7384 .rpc_resp = &res,
848f5bda 7385 .rpc_cred = cred,
fc931582
AA		 7386 };
7387 int status;
7388
7389 nfs4_init_channel_attrs(&args);
0f91421e 7390 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7391
1bd714f2 7392 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7393 trace_nfs4_create_session(clp, status);
fc931582 7394
43095d39 7395 if (!status) {
8d35301d 7396 /* Verify the session's negotiated channel_attrs values */
79969dd1 7397 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7398 /* Increment the clientid slot sequence id */
79969dd1
TM		 7399 if (clp->cl_seqid == res.seqid)
7400 clp->cl_seqid++;
7401 if (status)
7402 goto out;
7403 nfs4_update_session(session, &res);
fc931582 7404 }
79969dd1 7405out:
fc931582
AA		 7406 return status;
7407}
7408
7409/*
7410 * Issues a CREATE_SESSION operation to the server.
7411 * It is the responsibility of the caller to verify the session is
7412 * expired before calling this routine.
7413 */
848f5bda 7414int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7415{
7416 int status;
7417 unsigned *ptr;
fc931582
AA		 7418 struct nfs4_session *session = clp->cl_session;
7419
7420 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7421
848f5bda 7422 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7423 if (status)
7424 goto out;
7425
aacd5537
AA		 7426 /* Init or reset the session slot tables */
7427 status = nfs4_setup_session_slot_tables(session);
7428 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7429 if (status)
7430 goto out;
7431
7432 ptr = (unsigned *)&session->sess_id.data[0];
7433 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7434 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7435out:
7436 dprintk("<-- %s\n", __func__);
7437 return status;
7438}
7439
0f3e66c6
AA		 7440/*
7441 * Issue the over-the-wire RPC DESTROY_SESSION.
7442 * The caller must serialize access to this routine.
7443 */
848f5bda
TM		 7444int nfs4_proc_destroy_session(struct nfs4_session *session,
7445 struct rpc_cred *cred)
0f3e66c6 7446{
848f5bda
TM		 7447 struct rpc_message msg = {
7448 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7449 .rpc_argp = session,
7450 .rpc_cred = cred,
7451 };
0f3e66c6 7452 int status = 0;
0f3e66c6
AA		 7453
7454 dprintk("--> nfs4_proc_destroy_session\n");
7455
7456 /* session is still being setup */
e11259f9
TM		 7457 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7458 return 0;
0f3e66c6 7459
1bd714f2 7460 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7461 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7462
7463 if (status)
08106ac7 7464 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7465 "Session has been destroyed regardless...\n", status);
7466
7467 dprintk("<-- nfs4_proc_destroy_session\n");
7468 return status;
7469}
7470
fc01cea9
AA		 7471/*
7472 * Renew the cl_session lease.
7473 */
d5f8d3fe
TM		 7474struct nfs4_sequence_data {
7475 struct nfs_client *clp;
7476 struct nfs4_sequence_args args;
7477 struct nfs4_sequence_res res;
7478};
7479
dc96aef9
AB		 7480static void nfs41_sequence_release(void *data)
7481{
d5f8d3fe
TM		 7482 struct nfs4_sequence_data *calldata = data;
7483 struct nfs_client *clp = calldata->clp;
dc96aef9 7484
7135840f
AB		 7485 if (atomic_read(&clp->cl_count) > 1)
7486 nfs4_schedule_state_renewal(clp);
7487 nfs_put_client(clp);
d5f8d3fe 7488 kfree(calldata);
dc96aef9
AB		 7489}
7490
aa5190d0
TM		 7491static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7492{
7493 switch(task->tk_status) {
7494 case -NFS4ERR_DELAY:
aa5190d0
TM		 7495 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7496 return -EAGAIN;
7497 default:
0400a6b0 7498 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7499 }
7500 return 0;
7501}
7502
dc96aef9 7503static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7504{
d5f8d3fe
TM		 7505 struct nfs4_sequence_data *calldata = data;
7506 struct nfs_client *clp = calldata->clp;
fc01cea9 7507
14516c3a
TM		 7508 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7509 return;
fc01cea9 7510
c6d01c6f 7511 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7512 if (task->tk_status < 0) {
7513 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7514 if (atomic_read(&clp->cl_count) == 1)
7515 goto out;
fc01cea9 7516
aa5190d0
TM		 7517 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7518 rpc_restart_call_prepare(task);
fc01cea9
AA		 7519 return;
7520 }
7521 }
fc01cea9 7522 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7523out:
fc01cea9
AA		 7524 dprintk("<-- %s\n", __func__);
7525}
7526
7527static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7528{
d5f8d3fe
TM		 7529 struct nfs4_sequence_data *calldata = data;
7530 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7531 struct nfs4_sequence_args *args;
7532 struct nfs4_sequence_res *res;
7533
fc01cea9
AA		 7534 args = task->tk_msg.rpc_argp;
7535 res = task->tk_msg.rpc_resp;
7536
d9afbd1b 7537 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7538}
7539
7540static const struct rpc_call_ops nfs41_sequence_ops = {
7541 .rpc_call_done = nfs41_sequence_call_done,
7542 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7543 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7544};
7545
8fe72bac
TM		 7546static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7547 struct rpc_cred *cred,
7548 bool is_privileged)
fc01cea9 7549{
d5f8d3fe 7550 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7551 struct rpc_message msg = {
7552 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7553 .rpc_cred = cred,
7554 };
71ac6da9
TM		 7555 struct rpc_task_setup task_setup_data = {
7556 .rpc_client = clp->cl_rpcclient,
7557 .rpc_message = &msg,
8fe72bac 7558 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7559 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7560 };
fc01cea9 7561
7135840f 7562 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7563 return ERR_PTR(-EIO);
dfb4f309 7564 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7565 if (calldata == NULL) {
7135840f 7566 nfs_put_client(clp);
71ac6da9 7567 return ERR_PTR(-ENOMEM);
fc01cea9 7568 }
a9c92d6b 7569 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7570 if (is_privileged)
7571 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7572 msg.rpc_argp = &calldata->args;
7573 msg.rpc_resp = &calldata->res;
7574 calldata->clp = clp;
71ac6da9 7575 task_setup_data.callback_data = calldata;
fc01cea9 7576
71ac6da9
TM		 7577 return rpc_run_task(&task_setup_data);
7578}
7579
2f60ea6b 7580static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7581{
7582 struct rpc_task *task;
7583 int ret = 0;
7584
2f60ea6b 7585 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7586 return -EAGAIN;
8fe72bac 7587 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7588 if (IS_ERR(task))
7589 ret = PTR_ERR(task);
7590 else
bf294b41 7591 rpc_put_task_async(task);
71ac6da9
TM		 7592 dprintk("<-- %s status=%d\n", __func__, ret);
7593 return ret;
7594}
7595
7596static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7597{
7598 struct rpc_task *task;
7599 int ret;
7600
8fe72bac 7601 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7602 if (IS_ERR(task)) {
7603 ret = PTR_ERR(task);
7604 goto out;
7605 }
7606 ret = rpc_wait_for_completion_task(task);
be824167 7607 if (!ret)
71ac6da9
TM		 7608 ret = task->tk_status;
7609 rpc_put_task(task);
7610out:
7611 dprintk("<-- %s status=%d\n", __func__, ret);
7612 return ret;
fc01cea9
AA		 7613}
7614
fce5c838
RL		 7615struct nfs4_reclaim_complete_data {
7616 struct nfs_client *clp;
7617 struct nfs41_reclaim_complete_args arg;
7618 struct nfs41_reclaim_complete_res res;
7619};
7620
7621static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7622{
7623 struct nfs4_reclaim_complete_data *calldata = data;
7624
d9afbd1b
TM		 7625 nfs41_setup_sequence(calldata->clp->cl_session,
7626 &calldata->arg.seq_args,
7627 &calldata->res.seq_res,
7628 task);
fce5c838
RL		 7629}
7630
aa5190d0
TM		 7631static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7632{
7633 switch(task->tk_status) {
7634 case 0:
7635 case -NFS4ERR_COMPLETE_ALREADY:
7636 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7637 break;
7638 case -NFS4ERR_DELAY:
aa5190d0 7639 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7640 /* fall through */
7641 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7642 return -EAGAIN;
7643 default:
0400a6b0 7644 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7645 }
7646 return 0;
7647}
7648
fce5c838
RL		 7649static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7650{
7651 struct nfs4_reclaim_complete_data *calldata = data;
7652 struct nfs_client *clp = calldata->clp;
7653 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7654
7655 dprintk("--> %s\n", __func__);
14516c3a
TM		 7656 if (!nfs41_sequence_done(task, res))
7657 return;
fce5c838 7658
c6d01c6f 7659 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7660 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7661 rpc_restart_call_prepare(task);
7662 return;
7663 }
fce5c838
RL		 7664 dprintk("<-- %s\n", __func__);
7665}
7666
7667static void nfs4_free_reclaim_complete_data(void *data)
7668{
7669 struct nfs4_reclaim_complete_data *calldata = data;
7670
7671 kfree(calldata);
7672}
7673
7674static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7675 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7676 .rpc_call_done = nfs4_reclaim_complete_done,
7677 .rpc_release = nfs4_free_reclaim_complete_data,
7678};
7679
7680/*
7681 * Issue a global reclaim complete.
7682 */
965e9c23
TM		 7683static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7684 struct rpc_cred *cred)
fce5c838
RL		 7685{
7686 struct nfs4_reclaim_complete_data *calldata;
7687 struct rpc_task *task;
7688 struct rpc_message msg = {
7689 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7690 .rpc_cred = cred,
fce5c838
RL		 7691 };
7692 struct rpc_task_setup task_setup_data = {
7693 .rpc_client = clp->cl_rpcclient,
7694 .rpc_message = &msg,
7695 .callback_ops = &nfs4_reclaim_complete_call_ops,
7696 .flags = RPC_TASK_ASYNC,
7697 };
7698 int status = -ENOMEM;
7699
7700 dprintk("--> %s\n", __func__);
8535b2be 7701 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7702 if (calldata == NULL)
7703 goto out;
7704 calldata->clp = clp;
7705 calldata->arg.one_fs = 0;
fce5c838 7706
a9c92d6b 7707 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7708 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7709 msg.rpc_argp = &calldata->arg;
7710 msg.rpc_resp = &calldata->res;
7711 task_setup_data.callback_data = calldata;
7712 task = rpc_run_task(&task_setup_data);
acf82b85 7713 if (IS_ERR(task)) {
fce5c838 7714 status = PTR_ERR(task);
acf82b85
DC		 7715 goto out;
7716 }
c34c32ea
AA		 7717 status = nfs4_wait_for_completion_rpc_task(task);
7718 if (status == 0)
7719 status = task->tk_status;
fce5c838 7720 rpc_put_task(task);
acf82b85 7721 return 0;
fce5c838
RL		 7722out:
7723 dprintk("<-- %s status=%d\n", __func__, status);
7724 return status;
7725}
b1f69b75
AA		 7726
7727static void
7728nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7729{
7730 struct nfs4_layoutget *lgp = calldata;
c31663d4 7731 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7732 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7733
7734 dprintk("--> %s\n", __func__);
c31663d4
FI		 7735 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7736 * right now covering the LAYOUTGET we are about to send.
7737 * However, that is not so catastrophic, and there seems
7738 * to be no way to prevent it completely.
7739 */
6ba7db34 7740 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7741 &lgp->res.seq_res, task))
b1f69b75 7742 return;
cf7d63f1
FI		 7743 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7744 NFS_I(lgp->args.inode)->layout,
ce6ab4f2 7745 &lgp->args.range,
cf7d63f1
FI		 7746 lgp->args.ctx->state)) {
7747 rpc_exit(task, NFS4_OK);
cf7d63f1 7748 }
b1f69b75
AA		 7749}
7750
7751static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7752{
7753 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7754 struct inode *inode = lgp->args.inode;
7755 struct nfs_server *server = NFS_SERVER(inode);
7756 struct pnfs_layout_hdr *lo;
7757 struct nfs4_state *state = NULL;
ed7e5423 7758 unsigned long timeo, now, giveup;
b1f69b75 7759
ed7e5423 7760 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7761
6ba7db34 7762 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7763 goto out;
b1f69b75
AA		 7764
7765 switch (task->tk_status) {
7766 case 0:
ee314c2a 7767 goto out;
ed7e5423
BH		 7768 /*
7769 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7770 * (or clients) writing to the same RAID stripe
7771 */
b1f69b75 7772 case -NFS4ERR_LAYOUTTRYLATER:
ed7e5423
BH		 7773 /*
7774 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7775 * existing layout before getting a new one).
7776 */
b1f69b75 7777 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7778 timeo = rpc_get_timeout(task->tk_client);
7779 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7780 now = jiffies;
7781 if (time_after(giveup, now)) {
7782 unsigned long delay;
7783
7784 /* Delay for:
7785 * - Not less then NFS4_POLL_RETRY_MIN.
7786 * - One last time a jiffie before we give up
7787 * - exponential backoff (time_now minus start_attempt)
7788 */
7789 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7790 min((giveup - now - 1),
7791 now - lgp->args.timestamp));
7792
7793 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7794 __func__, delay);
7795 rpc_delay(task, delay);
7796 task->tk_status = 0;
7797 rpc_restart_call_prepare(task);
7798 goto out; /* Do not call nfs4_async_handle_error() */
7799 }
ee314c2a
TM		 7800 break;
7801 case -NFS4ERR_EXPIRED:
7802 case -NFS4ERR_BAD_STATEID:
7803 spin_lock(&inode->i_lock);
7804 lo = NFS_I(inode)->layout;
7805 if (!lo || list_empty(&lo->plh_segs)) {
7806 spin_unlock(&inode->i_lock);
7807 /* If the open stateid was bad, then recover it. */
7808 state = lgp->args.ctx->state;
7809 } else {
7810 LIST_HEAD(head);
7811
defb8460
CH		 7812 /*
7813 * Mark the bad layout state as invalid, then retry
7814 * with the current stateid.
7815 */
ee314c2a
TM		 7816 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7817 spin_unlock(&inode->i_lock);
ee314c2a 7818 pnfs_free_lseg_list(&head);
defb8460
CH		 7819
7820 task->tk_status = 0;
7821 rpc_restart_call_prepare(task);
b1f69b75
AA		 7822 }
7823 }
8478eaa1 7824 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
ee314c2a
TM		 7825 rpc_restart_call_prepare(task);
7826out:
b1f69b75
AA		 7827 dprintk("<-- %s\n", __func__);
7828}
7829
8554116e
IK		 7830static size_t max_response_pages(struct nfs_server *server)
7831{
7832 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7833 return nfs_page_array_len(0, max_resp_sz);
7834}
7835
7836static void nfs4_free_pages(struct page **pages, size_t size)
7837{
7838 int i;
7839
7840 if (!pages)
7841 return;
7842
7843 for (i = 0; i < size; i++) {
7844 if (!pages[i])
7845 break;
7846 __free_page(pages[i]);
7847 }
7848 kfree(pages);
7849}
7850
7851static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7852{
7853 struct page **pages;
7854 int i;
7855
7856 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7857 if (!pages) {
7858 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7859 return NULL;
7860 }
7861
7862 for (i = 0; i < size; i++) {
7863 pages[i] = alloc_page(gfp_flags);
7864 if (!pages[i]) {
7865 dprintk("%s: failed to allocate page\n", __func__);
7866 nfs4_free_pages(pages, size);
7867 return NULL;
7868 }
7869 }
7870
7871 return pages;
7872}
7873
b1f69b75
AA		 7874static void nfs4_layoutget_release(void *calldata)
7875{
7876 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7877 struct inode *inode = lgp->args.inode;
7878 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7879 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7880
7881 dprintk("--> %s\n", __func__);
8554116e 7882 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7883 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7884 put_nfs_open_context(lgp->args.ctx);
7885 kfree(calldata);
7886 dprintk("<-- %s\n", __func__);
7887}
7888
7889static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7890 .rpc_call_prepare = nfs4_layoutget_prepare,
7891 .rpc_call_done = nfs4_layoutget_done,
7892 .rpc_release = nfs4_layoutget_release,
7893};
7894
a0b0a6e3
TM		 7895struct pnfs_layout_segment *
7896nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7897{
a47970ff
WAA		 7898 struct inode *inode = lgp->args.inode;
7899 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7900 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7901 struct rpc_task *task;
7902 struct rpc_message msg = {
7903 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7904 .rpc_argp = &lgp->args,
7905 .rpc_resp = &lgp->res,
6ab59344 7906 .rpc_cred = lgp->cred,
b1f69b75
AA		 7907 };
7908 struct rpc_task_setup task_setup_data = {
7909 .rpc_client = server->client,
7910 .rpc_message = &msg,
7911 .callback_ops = &nfs4_layoutget_call_ops,
7912 .callback_data = lgp,
7913 .flags = RPC_TASK_ASYNC,
7914 };
a0b0a6e3 7915 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7916 int status = 0;
7917
7918 dprintk("--> %s\n", __func__);
7919
4bd5a980
PT		 7920 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7921 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7922
8554116e
IK		 7923 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7924 if (!lgp->args.layout.pages) {
7925 nfs4_layoutget_release(lgp);
a0b0a6e3 7926 return ERR_PTR(-ENOMEM);
8554116e
IK		 7927 }
7928 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7929 lgp->args.timestamp = jiffies;
8554116e 7930
35124a09 7931 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7932 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7933 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 7934
b1f69b75
AA		 7935 task = rpc_run_task(&task_setup_data);
7936 if (IS_ERR(task))
a0b0a6e3 7937 return ERR_CAST(task);
b1f69b75 7938 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7939 if (status == 0)
7940 status = task->tk_status;
1037e6ea
TM		 7941 trace_nfs4_layoutget(lgp->args.ctx,
7942 &lgp->args.range,
7943 &lgp->res.range,
7944 status);
085b7a45
WAA		 7945 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7946 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7947 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7948 rpc_put_task(task);
7949 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7950 if (status)
7951 return ERR_PTR(status);
7952 return lseg;
b1f69b75
AA		 7953}
7954
cbe82603
BH		 7955static void
7956nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7957{
7958 struct nfs4_layoutreturn *lrp = calldata;
7959
7960 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7961 nfs41_setup_sequence(lrp->clp->cl_session,
7962 &lrp->args.seq_args,
7963 &lrp->res.seq_res,
7964 task);
cbe82603
BH		 7965}
7966
7967static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7968{
7969 struct nfs4_layoutreturn *lrp = calldata;
7970 struct nfs_server *server;
7971
7972 dprintk("--> %s\n", __func__);
7973
6ba7db34 7974 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7975 return;
7976
7977 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 7978 switch (task->tk_status) {
7979 default:
7980 task->tk_status = 0;
7981 case 0:
7982 break;
7983 case -NFS4ERR_DELAY:
8478eaa1 7984 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 7985 break;
d00c5d43 7986 rpc_restart_call_prepare(task);
cbe82603
BH		 7987 return;
7988 }
cbe82603
BH		 7989 dprintk("<-- %s\n", __func__);
7990}
7991
7992static void nfs4_layoutreturn_release(void *calldata)
7993{
7994 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7995 struct pnfs_layout_hdr *lo = lrp->args.layout;
c5d73716 7996 LIST_HEAD(freeme);
cbe82603
BH		 7997
7998 dprintk("--> %s\n", __func__);
849b286f
TM		 7999 spin_lock(&lo->plh_inode->i_lock);
8000 if (lrp->res.lrs_present)
8001 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
c5d73716 8002 pnfs_mark_matching_lsegs_invalid(lo, &freeme, &lrp->args.range);
d67ae825 8003 pnfs_clear_layoutreturn_waitbit(lo);
849b286f
TM		 8004 lo->plh_block_lgets--;
8005 spin_unlock(&lo->plh_inode->i_lock);
c5d73716 8006 pnfs_free_lseg_list(&freeme);
70c3bd2b 8007 pnfs_put_layout_hdr(lrp->args.layout);
5a0ec8ac 8008 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 8009 kfree(calldata);
8010 dprintk("<-- %s\n", __func__);
8011}
8012
8013static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8014 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8015 .rpc_call_done = nfs4_layoutreturn_done,
8016 .rpc_release = nfs4_layoutreturn_release,
8017};
8018
6c16605d 8019int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 8020{
8021 struct rpc_task *task;
8022 struct rpc_message msg = {
8023 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8024 .rpc_argp = &lrp->args,
8025 .rpc_resp = &lrp->res,
9556000d 8026 .rpc_cred = lrp->cred,
cbe82603
BH		 8027 };
8028 struct rpc_task_setup task_setup_data = {
1771c577 8029 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8030 .rpc_message = &msg,
8031 .callback_ops = &nfs4_layoutreturn_call_ops,
8032 .callback_data = lrp,
8033 };
6c16605d 8034 int status = 0;
cbe82603
BH		 8035
8036 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8037 if (!sync) {
8038 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8039 if (!lrp->inode) {
8040 nfs4_layoutreturn_release(lrp);
8041 return -EAGAIN;
8042 }
8043 task_setup_data.flags |= RPC_TASK_ASYNC;
8044 }
a9c92d6b 8045 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8046 task = rpc_run_task(&task_setup_data);
8047 if (IS_ERR(task))
8048 return PTR_ERR(task);
5a0ec8ac
TM		 8049 if (sync)
8050 status = task->tk_status;
1037e6ea 8051 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 8052 dprintk("<-- %s status=%d\n", __func__, status);
8053 rpc_put_task(task);
8054 return status;
8055}
8056
b1f69b75 8057static int
cd5875fe
TM		 8058_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8059 struct pnfs_device *pdev,
8060 struct rpc_cred *cred)
b1f69b75
AA		 8061{
8062 struct nfs4_getdeviceinfo_args args = {
8063 .pdev = pdev,
4e590803
TM		 8064 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8065 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8066 };
8067 struct nfs4_getdeviceinfo_res res = {
8068 .pdev = pdev,
8069 };
8070 struct rpc_message msg = {
8071 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8072 .rpc_argp = &args,
8073 .rpc_resp = &res,
cd5875fe 8074 .rpc_cred = cred,
b1f69b75
AA		 8075 };
8076 int status;
8077
8078 dprintk("--> %s\n", __func__);
7c513058 8079 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8080 if (res.notification & ~args.notify_types)
8081 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8082 if (res.notification != args.notify_types)
8083 pdev->nocache = 1;
4e590803 8084
b1f69b75
AA		 8085 dprintk("<-- %s status=%d\n", __func__, status);
8086
8087 return status;
8088}
8089
cd5875fe
TM		 8090int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8091 struct pnfs_device *pdev,
8092 struct rpc_cred *cred)
b1f69b75
AA		 8093{
8094 struct nfs4_exception exception = { };
8095 int err;
8096
8097 do {
8098 err = nfs4_handle_exception(server,
cd5875fe 8099 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8100 &exception);
8101 } while (exception.retry);
8102 return err;
8103}
8104EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8105
863a3c6c
AA		 8106static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8107{
8108 struct nfs4_layoutcommit_data *data = calldata;
8109 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 8110 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 8111
d9afbd1b
TM		 8112 nfs41_setup_sequence(session,
8113 &data->args.seq_args,
8114 &data->res.seq_res,
8115 task);
863a3c6c
AA		 8116}
8117
8118static void
8119nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8120{
8121 struct nfs4_layoutcommit_data *data = calldata;
8122 struct nfs_server *server = NFS_SERVER(data->args.inode);
8123
6ba7db34 8124 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8125 return;
8126
8127 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8128 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8129 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8130 case -NFS4ERR_BADLAYOUT: /* no layout */
8131 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8132 task->tk_status = 0;
e59d27e0 8133 case 0:
e59d27e0
TM		 8134 break;
8135 default:
8478eaa1 8136 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8137 rpc_restart_call_prepare(task);
8138 return;
8139 }
8140 }
863a3c6c
AA		 8141}
8142
8143static void nfs4_layoutcommit_release(void *calldata)
8144{
8145 struct nfs4_layoutcommit_data *data = calldata;
8146
db29c089 8147 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8148 nfs_post_op_update_inode_force_wcc(data->args.inode,
8149 data->res.fattr);
863a3c6c 8150 put_rpccred(data->cred);
472e2594 8151 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8152 kfree(data);
8153}
8154
8155static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8156 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8157 .rpc_call_done = nfs4_layoutcommit_done,
8158 .rpc_release = nfs4_layoutcommit_release,
8159};
8160
8161int
ef311537 8162nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8163{
8164 struct rpc_message msg = {
8165 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8166 .rpc_argp = &data->args,
8167 .rpc_resp = &data->res,
8168 .rpc_cred = data->cred,
8169 };
8170 struct rpc_task_setup task_setup_data = {
8171 .task = &data->task,
8172 .rpc_client = NFS_CLIENT(data->args.inode),
8173 .rpc_message = &msg,
8174 .callback_ops = &nfs4_layoutcommit_ops,
8175 .callback_data = data,
863a3c6c
AA		 8176 };
8177 struct rpc_task *task;
8178 int status = 0;
8179
b4839ebe
KM		 8180 dprintk("NFS: initiating layoutcommit call. sync %d "
8181 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8182 data->args.lastbytewritten,
8183 data->args.inode->i_ino);
8184
472e2594
TM		 8185 if (!sync) {
8186 data->inode = nfs_igrab_and_active(data->args.inode);
8187 if (data->inode == NULL) {
8188 nfs4_layoutcommit_release(data);
8189 return -EAGAIN;
8190 }
8191 task_setup_data.flags = RPC_TASK_ASYNC;
8192 }
a9c92d6b 8193 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8194 task = rpc_run_task(&task_setup_data);
8195 if (IS_ERR(task))
8196 return PTR_ERR(task);
472e2594
TM		 8197 if (sync)
8198 status = task->tk_status;
1037e6ea 8199 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 8200 dprintk("%s: status %d\n", __func__, status);
8201 rpc_put_task(task);
8202 return status;
8203}
fca78d6d 8204
97431204
AA		 8205/**
8206 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8207 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8208 */
fca78d6d
BS		 8209static int
8210_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8211 struct nfs_fsinfo *info,
8212 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8213{
8214 struct nfs41_secinfo_no_name_args args = {
8215 .style = SECINFO_STYLE_CURRENT_FH,
8216 };
8217 struct nfs4_secinfo_res res = {
8218 .flavors = flavors,
8219 };
8220 struct rpc_message msg = {
8221 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8222 .rpc_argp = &args,
8223 .rpc_resp = &res,
8224 };
b1b3e136 8225 struct rpc_clnt *clnt = server->client;
7cb852df 8226 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8227 int status;
8228
8229 if (use_integrity) {
8230 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8231 cred = nfs4_get_clid_cred(server->nfs_client);
8232 msg.rpc_cred = cred;
b1b3e136
WAA		 8233 }
8234
8235 dprintk("--> %s\n", __func__);
8236 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8237 &res.seq_res, 0);
8238 dprintk("<-- %s status=%d\n", __func__, status);
8239
7cb852df
WAA		 8240 if (cred)
8241 put_rpccred(cred);
b1b3e136
WAA		 8242
8243 return status;
fca78d6d
BS		 8244}
8245
8246static int
8247nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8248 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8249{
8250 struct nfs4_exception exception = { };
8251 int err;
8252 do {
b1b3e136
WAA		 8253 /* first try using integrity protection */
8254 err = -NFS4ERR_WRONGSEC;
8255
8256 /* try to use integrity protection with machine cred */
8257 if (_nfs4_is_integrity_protected(server->nfs_client))
8258 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8259 flavors, true);
8260
8261 /*
8262 * if unable to use integrity protection, or SECINFO with
8263 * integrity protection returns NFS4ERR_WRONGSEC (which is
8264 * disallowed by spec, but exists in deployed servers) use
8265 * the current filesystem's rpc_client and the user cred.
8266 */
8267 if (err == -NFS4ERR_WRONGSEC)
8268 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8269 flavors, false);
8270
fca78d6d
BS		 8271 switch (err) {
8272 case 0:
8273 case -NFS4ERR_WRONGSEC:
78b19bae 8274 case -ENOTSUPP:
05e9cfb4 8275 goto out;
fca78d6d
BS		 8276 default:
8277 err = nfs4_handle_exception(server, err, &exception);
8278 }
8279 } while (exception.retry);
05e9cfb4 8280out:
fca78d6d
BS		 8281 return err;
8282}
8283
8284static int
8285nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8286 struct nfs_fsinfo *info)
8287{
8288 int err;
8289 struct page *page;
367156d9 8290 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8291 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8292 struct nfs4_secinfo4 *secinfo;
8293 int i;
fca78d6d
BS		 8294
8295 page = alloc_page(GFP_KERNEL);
8296 if (!page) {
8297 err = -ENOMEM;
8298 goto out;
8299 }
8300
8301 flavors = page_address(page);
8302 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8303
8304 /*
8305 * Fall back on "guess and check" method if
8306 * the server doesn't support SECINFO_NO_NAME
8307 */
78b19bae 8308 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8309 err = nfs4_find_root_sec(server, fhandle, info);
8310 goto out_freepage;
8311 }
8312 if (err)
8313 goto out_freepage;
8314
58a8cf12
WAA		 8315 for (i = 0; i < flavors->num_flavors; i++) {
8316 secinfo = &flavors->flavors[i];
8317
8318 switch (secinfo->flavor) {
8319 case RPC_AUTH_NULL:
8320 case RPC_AUTH_UNIX:
8321 case RPC_AUTH_GSS:
8322 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8323 &secinfo->flavor_info);
8324 break;
8325 default:
8326 flavor = RPC_AUTH_MAXFLAVOR;
8327 break;
8328 }
8329
4d4b69dd
WAA		 8330 if (!nfs_auth_info_match(&server->auth_info, flavor))
8331 flavor = RPC_AUTH_MAXFLAVOR;
8332
58a8cf12
WAA		 8333 if (flavor != RPC_AUTH_MAXFLAVOR) {
8334 err = nfs4_lookup_root_sec(server, fhandle,
8335 info, flavor);
8336 if (!err)
8337 break;
8338 }
8339 }
8340
8341 if (flavor == RPC_AUTH_MAXFLAVOR)
8342 err = -EPERM;
fca78d6d
BS		 8343
8344out_freepage:
8345 put_page(page);
8346 if (err == -EACCES)
8347 return -EPERM;
8348out:
8349 return err;
8350}
1cab0652 8351
ab7cb0df
TM		 8352static int _nfs41_test_stateid(struct nfs_server *server,
8353 nfs4_stateid *stateid,
8354 struct rpc_cred *cred)
7d974794
BS		 8355{
8356 int status;
8357 struct nfs41_test_stateid_args args = {
1cab0652 8358 .stateid = stateid,
7d974794
BS		 8359 };
8360 struct nfs41_test_stateid_res res;
8361 struct rpc_message msg = {
8362 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8363 .rpc_argp = &args,
8364 .rpc_resp = &res,
ab7cb0df 8365 .rpc_cred = cred,
7d974794 8366 };
3787d506
WAA		 8367 struct rpc_clnt *rpc_client = server->client;
8368
8369 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8370 &rpc_client, &msg);
1cab0652 8371
38527b15 8372 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8373 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8374 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8375 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8376 &args.seq_args, &res.seq_res);
38527b15
CL		 8377 if (status != NFS_OK) {
8378 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8379 return status;
38527b15
CL		 8380 }
8381 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8382 return -res.status;
7d974794
BS		 8383}
8384
38527b15
CL		 8385/**
8386 * nfs41_test_stateid - perform a TEST_STATEID operation
8387 *
8388 * @server: server / transport on which to perform the operation
8389 * @stateid: state ID to test
ab7cb0df 8390 * @cred: credential
38527b15
CL		 8391 *
8392 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8393 * Otherwise a negative NFS4ERR value is returned if the operation
8394 * failed or the state ID is not currently valid.
8395 */
ab7cb0df
TM		 8396static int nfs41_test_stateid(struct nfs_server *server,
8397 nfs4_stateid *stateid,
8398 struct rpc_cred *cred)
7d974794
BS		 8399{
8400 struct nfs4_exception exception = { };
8401 int err;
8402 do {
ab7cb0df 8403 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8404 if (err != -NFS4ERR_DELAY)
8405 break;
8406 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8407 } while (exception.retry);
8408 return err;
8409}
9aeda35f 8410
7c1d5fae
TM		 8411struct nfs_free_stateid_data {
8412 struct nfs_server *server;
8413 struct nfs41_free_stateid_args args;
9aeda35f 8414 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8415};
8416
8417static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8418{
8419 struct nfs_free_stateid_data *data = calldata;
8420 nfs41_setup_sequence(nfs4_get_session(data->server),
8421 &data->args.seq_args,
8422 &data->res.seq_res,
8423 task);
8424}
8425
8426static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8427{
8428 struct nfs_free_stateid_data *data = calldata;
8429
8430 nfs41_sequence_done(task, &data->res.seq_res);
8431
8432 switch (task->tk_status) {
8433 case -NFS4ERR_DELAY:
8478eaa1 8434 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8435 rpc_restart_call_prepare(task);
8436 }
8437}
8438
8439static void nfs41_free_stateid_release(void *calldata)
8440{
8441 kfree(calldata);
8442}
8443
17f26b12 8444static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8445 .rpc_call_prepare = nfs41_free_stateid_prepare,
8446 .rpc_call_done = nfs41_free_stateid_done,
8447 .rpc_release = nfs41_free_stateid_release,
8448};
8449
8450static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8451 nfs4_stateid *stateid,
ab7cb0df 8452 struct rpc_cred *cred,
7c1d5fae
TM		 8453 bool privileged)
8454{
9aeda35f
BS		 8455 struct rpc_message msg = {
8456 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8457 .rpc_cred = cred,
9aeda35f 8458 };
7c1d5fae
TM		 8459 struct rpc_task_setup task_setup = {
8460 .rpc_client = server->client,
8461 .rpc_message = &msg,
8462 .callback_ops = &nfs41_free_stateid_ops,
8463 .flags = RPC_TASK_ASYNC,
8464 };
8465 struct nfs_free_stateid_data *data;
9aeda35f 8466
3787d506
WAA		 8467 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8468 &task_setup.rpc_client, &msg);
8469
38527b15 8470 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8471 data = kmalloc(sizeof(*data), GFP_NOFS);
8472 if (!data)
8473 return ERR_PTR(-ENOMEM);
8474 data->server = server;
8475 nfs4_stateid_copy(&data->args.stateid, stateid);
8476
8477 task_setup.callback_data = data;
8478
8479 msg.rpc_argp = &data->args;
8480 msg.rpc_resp = &data->res;
a9c92d6b 8481 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8482 if (privileged)
8483 nfs4_set_sequence_privileged(&data->args.seq_args);
8484
8485 return rpc_run_task(&task_setup);
9aeda35f
BS		 8486}
8487
38527b15
CL		 8488/**
8489 * nfs41_free_stateid - perform a FREE_STATEID operation
8490 *
8491 * @server: server / transport on which to perform the operation
8492 * @stateid: state ID to release
ab7cb0df 8493 * @cred: credential
38527b15
CL		 8494 *
8495 * Returns NFS_OK if the server freed "stateid". Otherwise a
8496 * negative NFS4ERR value is returned.
8497 */
ab7cb0df
TM		 8498static int nfs41_free_stateid(struct nfs_server *server,
8499 nfs4_stateid *stateid,
8500 struct rpc_cred *cred)
9aeda35f 8501{
7c1d5fae
TM		 8502 struct rpc_task *task;
8503 int ret;
8504
ab7cb0df 8505 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8506 if (IS_ERR(task))
8507 return PTR_ERR(task);
8508 ret = rpc_wait_for_completion_task(task);
8509 if (!ret)
8510 ret = task->tk_status;
8511 rpc_put_task(task);
8512 return ret;
9aeda35f 8513}
36281caa 8514
f1cdae87
JL		 8515static void
8516nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8517{
8518 struct rpc_task *task;
ab7cb0df 8519 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8520
ab7cb0df 8521 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8522 nfs4_free_lock_state(server, lsp);
8523 if (IS_ERR(task))
f1cdae87 8524 return;
c8b2d0bf 8525 rpc_put_task(task);
c8b2d0bf
TM		 8526}
8527
36281caa
TM		 8528static bool nfs41_match_stateid(const nfs4_stateid *s1,
8529 const nfs4_stateid *s2)
8530{
2d2f24ad 8531 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8532 return false;
8533
2d2f24ad 8534 if (s1->seqid == s2->seqid)
36281caa 8535 return true;
2d2f24ad 8536 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8537 return true;
8538
8539 return false;
8540}
8541
557134a3
AA		 8542#endif /* CONFIG_NFS_V4_1 */
8543
36281caa
TM		 8544static bool nfs4_match_stateid(const nfs4_stateid *s1,
8545 const nfs4_stateid *s2)
8546{
f597c537 8547 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8548}
8549
8550
17280175 8551static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8552 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8553 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8554 .recover_open = nfs4_open_reclaim,
8555 .recover_lock = nfs4_lock_reclaim,
591d71cb 8556 .establish_clid = nfs4_init_clientid,
05f4c350 8557 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8558};
8559
591d71cb 8560#if defined(CONFIG_NFS_V4_1)
17280175 8561static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8562 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8563 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8564 .recover_open = nfs4_open_reclaim,
8565 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8566 .establish_clid = nfs41_init_clientid,
fce5c838 8567 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8568 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8569};
8570#endif /* CONFIG_NFS_V4_1 */
8571
17280175 8572static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8573 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8574 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8575 .recover_open = nfs40_open_expired,
591d71cb
AA		 8576 .recover_lock = nfs4_lock_expired,
8577 .establish_clid = nfs4_init_clientid,
8578};
8579
8580#if defined(CONFIG_NFS_V4_1)
17280175 8581static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8582 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8583 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8584 .recover_open = nfs41_open_expired,
8585 .recover_lock = nfs41_lock_expired,
4d643d1d 8586 .establish_clid = nfs41_init_clientid,
1da177e4 8587};
591d71cb 8588#endif /* CONFIG_NFS_V4_1 */
1da177e4 8589
17280175 8590static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8591 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8592 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8593 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8594};
8595
8596#if defined(CONFIG_NFS_V4_1)
17280175 8597static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8598 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8599 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8600 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8601};
8602#endif
8603
ec011fe8 8604static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8605 .get_locations = _nfs40_proc_get_locations,
44c99933 8606 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8607};
8608
8609#if defined(CONFIG_NFS_V4_1)
8610static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8611 .get_locations = _nfs41_proc_get_locations,
44c99933 8612 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8613};
8614#endif /* CONFIG_NFS_V4_1 */
8615
97dc1359
TM		 8616static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8617 .minor_version = 0,
39c6daae
TM		 8618 .init_caps = NFS_CAP_READDIRPLUS
8619 | NFS_CAP_ATOMIC_OPEN
39c6daae 8620 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8621 .init_client = nfs40_init_client,
8622 .shutdown_client = nfs40_shutdown_client,
36281caa 8623 .match_stateid = nfs4_match_stateid,
fca78d6d 8624 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8625 .free_lock_state = nfs4_release_lockowner,
63f5f796 8626 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 8627 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8628 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8629 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8630 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8631 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8632};
8633
8634#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 8635static struct nfs_seqid *
8636nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8637{
8638 return NULL;
8639}
8640
97dc1359
TM		 8641static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8642 .minor_version = 1,
39c6daae
TM		 8643 .init_caps = NFS_CAP_READDIRPLUS
8644 | NFS_CAP_ATOMIC_OPEN
3b66486c 8645 | NFS_CAP_POSIX_LOCK
49f9a0fa 8646 | NFS_CAP_STATEID_NFSV41
e983120e 8647 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8648 .init_client = nfs41_init_client,
8649 .shutdown_client = nfs41_shutdown_client,
36281caa 8650 .match_stateid = nfs41_match_stateid,
fca78d6d 8651 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8652 .free_lock_state = nfs41_free_lock_state,
63f5f796 8653 .alloc_seqid = nfs_alloc_no_seqid,
9915ea7e 8654 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8655 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8656 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8657 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8658 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8659};
8660#endif
8661
42c2c424
SD		 8662#if defined(CONFIG_NFS_V4_2)
8663static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8664 .minor_version = 2,
7017310a
BS		 8665 .init_caps = NFS_CAP_READDIRPLUS
8666 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 8667 | NFS_CAP_POSIX_LOCK
8668 | NFS_CAP_STATEID_NFSV41
e983120e 8669 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 8670 | NFS_CAP_ALLOCATE
624bd5b7 8671 | NFS_CAP_DEALLOCATE
6c5a0d89
TM		 8672 | NFS_CAP_SEEK
8673 | NFS_CAP_LAYOUTSTATS,
abf79bb3
CL		 8674 .init_client = nfs41_init_client,
8675 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8676 .match_stateid = nfs41_match_stateid,
8677 .find_root_sec = nfs41_find_root_sec,
7017310a 8678 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8679 .call_sync_ops = &nfs41_call_sync_ops,
63f5f796 8680 .alloc_seqid = nfs_alloc_no_seqid,
42c2c424
SD		 8681 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8682 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8683 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 8684 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 8685};
8686#endif
8687
97dc1359
TM		 8688const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8689 [0] = &nfs_v4_0_minor_ops,
8690#if defined(CONFIG_NFS_V4_1)
8691 [1] = &nfs_v4_1_minor_ops,
8692#endif
42c2c424
SD		 8693#if defined(CONFIG_NFS_V4_2)
8694 [2] = &nfs_v4_2_minor_ops,
8695#endif
97dc1359
TM		 8696};
8697
17f26b12 8698static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8699 .create = nfs_create,
8700 .lookup = nfs_lookup,
8701 .atomic_open = nfs_atomic_open,
8702 .link = nfs_link,
8703 .unlink = nfs_unlink,
8704 .symlink = nfs_symlink,
8705 .mkdir = nfs_mkdir,
8706 .rmdir = nfs_rmdir,
8707 .mknod = nfs_mknod,
8708 .rename = nfs_rename,
8709 .permission = nfs_permission,
8710 .getattr = nfs_getattr,
8711 .setattr = nfs_setattr,
8712 .getxattr = generic_getxattr,
8713 .setxattr = generic_setxattr,
8714 .listxattr = generic_listxattr,
8715 .removexattr = generic_removexattr,
8716};
8717
92e1d5be 8718static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8719 .permission = nfs_permission,
8720 .getattr = nfs_getattr,
8721 .setattr = nfs_setattr,
64c2ce8b
AK		 8722 .getxattr = generic_getxattr,
8723 .setxattr = generic_setxattr,
8724 .listxattr = generic_listxattr,
8725 .removexattr = generic_removexattr,
6b3b5496
BF		 8726};
8727
509de811 8728const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8729 .version = 4, /* protocol version */
8730 .dentry_ops = &nfs4_dentry_operations,
8731 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8732 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8733 .file_ops = &nfs4_file_operations,
1da177e4 8734 .getroot = nfs4_proc_get_root,
281cad46 8735 .submount = nfs4_submount,
ff9099f2 8736 .try_mount = nfs4_try_mount,
1da177e4
LT		 8737 .getattr = nfs4_proc_getattr,
8738 .setattr = nfs4_proc_setattr,
8739 .lookup = nfs4_proc_lookup,
8740 .access = nfs4_proc_access,
8741 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8742 .create = nfs4_proc_create,
8743 .remove = nfs4_proc_remove,
8744 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8745 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8746 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8747 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8748 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8749 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8750 .link = nfs4_proc_link,
8751 .symlink = nfs4_proc_symlink,
8752 .mkdir = nfs4_proc_mkdir,
8753 .rmdir = nfs4_proc_remove,
8754 .readdir = nfs4_proc_readdir,
8755 .mknod = nfs4_proc_mknod,
8756 .statfs = nfs4_proc_statfs,
8757 .fsinfo = nfs4_proc_fsinfo,
8758 .pathconf = nfs4_proc_pathconf,
e9326dca 8759 .set_capabilities = nfs4_server_capabilities,
1da177e4 8760 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8761 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8762 .read_setup = nfs4_proc_read_setup,
ec06c096 8763 .read_done = nfs4_read_done,
1da177e4 8764 .write_setup = nfs4_proc_write_setup,
788e7a89 8765 .write_done = nfs4_write_done,
1da177e4 8766 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8767 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8768 .commit_done = nfs4_commit_done,
1da177e4 8769 .lock = nfs4_proc_lock,
e50a1c2e 8770 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8771 .close_context = nfs4_close_context,
2b484297 8772 .open_context = nfs4_atomic_open,
011e2a7f 8773 .have_delegation = nfs4_have_delegation,
57ec14c5 8774 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8775 .alloc_client = nfs4_alloc_client,
45a52a02 8776 .init_client = nfs4_init_client,
cdb7eced 8777 .free_client = nfs4_free_client,
1179acc6
BS		 8778 .create_server = nfs4_create_server,
8779 .clone_server = nfs_clone_server,
1da177e4
LT		 8780};
8781
64c2ce8b
AK		 8782static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8783 .prefix = XATTR_NAME_NFSV4_ACL,
8784 .list = nfs4_xattr_list_nfs4_acl,
8785 .get = nfs4_xattr_get_nfs4_acl,
8786 .set = nfs4_xattr_set_nfs4_acl,
8787};
8788
8789const struct xattr_handler *nfs4_xattr_handlers[] = {
8790 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8791#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8792 &nfs4_xattr_nfs4_label_handler,
8793#endif
64c2ce8b
AK		 8794 NULL
8795};
8796
1da177e4
LT		 8797/*
8798 * Local variables:
8799 * c-basic-offset: 8
8800 * End:
8801 */
Linux 6.x block layer and io_uring tree(s)