projects / linux-2.6-block.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
NFS: Check size by inode_newsize_ok in nfs_setattr
[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 }
5bc2afc2
TM		 2455 if (opendata->file_created)
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{
43652ad5
BH		 2896 struct nfs4_server_caps_arg args = {
2897 .fhandle = fhandle,
2898 };
1da177e4
LT		 2899 struct nfs4_server_caps_res res = {};
2900 struct rpc_message msg = {
2901 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2902 .rpc_argp = &args,
1da177e4
LT		 2903 .rpc_resp = &res,
2904 };
2905 int status;
2906
7c513058 2907 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2908 if (status == 0) {
b944dba3
TM		 2909 /* Sanity check the server answers */
2910 switch (server->nfs_client->cl_minorversion) {
2911 case 0:
2912 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2913 res.attr_bitmask[2] = 0;
2914 break;
2915 case 1:
2916 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2917 break;
2918 case 2:
2919 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2920 }
1da177e4 2921 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2922 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2923 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2924 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2925 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 2926 NFS_CAP_CTIME|NFS_CAP_MTIME|
2927 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 2928 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2929 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 2930 server->caps |= NFS_CAP_ACLS;
2931 if (res.has_links != 0)
2932 server->caps |= NFS_CAP_HARDLINKS;
2933 if (res.has_symlinks != 0)
2934 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2935 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2936 server->caps |= NFS_CAP_FILEID;
2937 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2938 server->caps |= NFS_CAP_MODE;
2939 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2940 server->caps |= NFS_CAP_NLINK;
2941 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2942 server->caps |= NFS_CAP_OWNER;
2943 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2944 server->caps |= NFS_CAP_OWNER_GROUP;
2945 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2946 server->caps |= NFS_CAP_ATIME;
2947 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2948 server->caps |= NFS_CAP_CTIME;
2949 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2950 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2951#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2952 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2953 server->caps |= NFS_CAP_SECURITY_LABEL;
2954#endif
2955 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2956 sizeof(server->attr_bitmask));
b944dba3 2957 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 2958
a65318bf
TM		 2959 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2960 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2961 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 2962 server->cache_consistency_bitmask[2] = 0;
1da177e4 2963 server->acl_bitmask = res.acl_bitmask;
264e6351 2964 server->fh_expire_type = res.fh_expire_type;
1da177e4 2965 }
cccef3b9 2966
1da177e4
LT		 2967 return status;
2968}
2969
55a97593 2970int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2971{
2972 struct nfs4_exception exception = { };
2973 int err;
2974 do {
2975 err = nfs4_handle_exception(server,
2976 _nfs4_server_capabilities(server, fhandle),
2977 &exception);
2978 } while (exception.retry);
2979 return err;
2980}
2981
2982static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2983 struct nfs_fsinfo *info)
2984{
aa9c2669 2985 u32 bitmask[3];
1da177e4 2986 struct nfs4_lookup_root_arg args = {
aa9c2669 2987 .bitmask = bitmask,
1da177e4
LT		 2988 };
2989 struct nfs4_lookup_res res = {
2990 .server = server,
0e574af1 2991 .fattr = info->fattr,
1da177e4
LT		 2992 .fh = fhandle,
2993 };
2994 struct rpc_message msg = {
2995 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2996 .rpc_argp = &args,
2997 .rpc_resp = &res,
2998 };
008f55d0 2999
aa9c2669
DQ		 3000 bitmask[0] = nfs4_fattr_bitmap[0];
3001 bitmask[1] = nfs4_fattr_bitmap[1];
3002 /*
3003 * Process the label in the upcoming getfattr
3004 */
3005 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
3006
0e574af1 3007 nfs_fattr_init(info->fattr);
7c513058 3008 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3009}
3010
3011static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
3012 struct nfs_fsinfo *info)
3013{
3014 struct nfs4_exception exception = { };
3015 int err;
3016 do {
fb8a5ba8 3017 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3018 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3019 switch (err) {
3020 case 0:
3021 case -NFS4ERR_WRONGSEC:
05e9cfb4 3022 goto out;
fb8a5ba8
BS		 3023 default:
3024 err = nfs4_handle_exception(server, err, &exception);
3025 }
1da177e4 3026 } while (exception.retry);
05e9cfb4 3027out:
1da177e4
LT		 3028 return err;
3029}
3030
8f70e95f
BS		 3031static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3032 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3033{
c2190661
TM		 3034 struct rpc_auth_create_args auth_args = {
3035 .pseudoflavor = flavor,
3036 };
8f70e95f
BS		 3037 struct rpc_auth *auth;
3038 int ret;
3039
c2190661 3040 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3041 if (IS_ERR(auth)) {
75bc8821 3042 ret = -EACCES;
8f70e95f
BS		 3043 goto out;
3044 }
3045 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3046out:
3047 return ret;
3048}
3049
9a744ba3
CL		 3050/*
3051 * Retry pseudoroot lookup with various security flavors. We do this when:
3052 *
3053 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3054 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3055 *
3056 * Returns zero on success, or a negative NFS4ERR value, or a
3057 * negative errno value.
3058 */
801a16dc 3059static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3060 struct nfs_fsinfo *info)
1da177e4 3061{
9a744ba3
CL		 3062 /* Per 3530bis 15.33.5 */
3063 static const rpc_authflavor_t flav_array[] = {
3064 RPC_AUTH_GSS_KRB5P,
3065 RPC_AUTH_GSS_KRB5I,
3066 RPC_AUTH_GSS_KRB5,
c4eafe11 3067 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3068 RPC_AUTH_NULL,
3069 };
3070 int status = -EPERM;
3071 size_t i;
6a1a1e34 3072
4d4b69dd
WAA		 3073 if (server->auth_info.flavor_len > 0) {
3074 /* try each flavor specified by user */
3075 for (i = 0; i < server->auth_info.flavor_len; i++) {
3076 status = nfs4_lookup_root_sec(server, fhandle, info,
3077 server->auth_info.flavors[i]);
3078 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3079 continue;
3080 break;
3081 }
3082 } else {
3083 /* no flavors specified by user, try default list */
3084 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3085 status = nfs4_lookup_root_sec(server, fhandle, info,
3086 flav_array[i]);
3087 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3088 continue;
3089 break;
3090 }
8f70e95f 3091 }
9a744ba3 3092
fb8a5ba8
BS		 3093 /*
3094 * -EACCESS could mean that the user doesn't have correct permissions
3095 * to access the mount. It could also mean that we tried to mount
3096 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3097 * existing mount programs don't handle -EACCES very well so it should
3098 * be mapped to -EPERM instead.
3099 */
3100 if (status == -EACCES)
3101 status = -EPERM;
801a16dc
BS		 3102 return status;
3103}
3104
2ed4b95b
CL		 3105static int nfs4_do_find_root_sec(struct nfs_server *server,
3106 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3107{
3108 int mv = server->nfs_client->cl_minorversion;
3109 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3110}
3111
3112/**
3113 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3114 * @server: initialized nfs_server handle
3115 * @fhandle: we fill in the pseudo-fs root file handle
3116 * @info: we fill in an FSINFO struct
5e6b1990 3117 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3118 *
3119 * Returns zero on success, or a negative errno.
801a16dc 3120 */
3028eb2b 3121int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3122 struct nfs_fsinfo *info,
3123 bool auth_probe)
801a16dc 3124{
c7757074 3125 int status = 0;
2ed4b95b 3126
c7757074 3127 if (!auth_probe)
5e6b1990 3128 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3129
3130 if (auth_probe || status == NFS4ERR_WRONGSEC)
2ed4b95b
CL		 3131 status = nfs4_do_find_root_sec(server, fhandle, info);
3132
1da177e4
LT		 3133 if (status == 0)
3134 status = nfs4_server_capabilities(server, fhandle);
3135 if (status == 0)
3136 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3137
c12e87f4 3138 return nfs4_map_errors(status);
1da177e4
LT		 3139}
3140
bae36241
BS		 3141static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3142 struct nfs_fsinfo *info)
3143{
3144 int error;
3145 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3146 struct nfs4_label *label = NULL;
bae36241
BS		 3147
3148 error = nfs4_server_capabilities(server, mntfh);
3149 if (error < 0) {
3150 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3151 return error;
3152 }
3153
14c43f76
DQ		 3154 label = nfs4_label_alloc(server, GFP_KERNEL);
3155 if (IS_ERR(label))
3156 return PTR_ERR(label);
3157
1775fd3e 3158 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3159 if (error < 0) {
3160 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3161 goto err_free_label;
bae36241
BS		 3162 }
3163
3164 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3165 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3166 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3167
14c43f76
DQ		 3168err_free_label:
3169 nfs4_label_free(label);
3170
bae36241
BS		 3171 return error;
3172}
3173
6b97fd3d
MN		 3174/*
3175 * Get locations and (maybe) other attributes of a referral.
3176 * Note that we'll actually follow the referral later when
3177 * we detect fsid mismatch in inode revalidation
3178 */
f05d147f
BS		 3179static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3180 const struct qstr *name, struct nfs_fattr *fattr,
3181 struct nfs_fh *fhandle)
6b97fd3d
MN		 3182{
3183 int status = -ENOMEM;
3184 struct page *page = NULL;
3185 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3186
3187 page = alloc_page(GFP_KERNEL);
3188 if (page == NULL)
3189 goto out;
3190 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3191 if (locations == NULL)
3192 goto out;
3193
f05d147f 3194 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3195 if (status != 0)
3196 goto out;
519ae255
CL		 3197
3198 /*
3199 * If the fsid didn't change, this is a migration event, not a
3200 * referral. Cause us to drop into the exception handler, which
3201 * will kick off migration recovery.
3202 */
6b97fd3d 3203 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3204 dprintk("%s: server did not return a different fsid for"
3205 " a referral at %s\n", __func__, name->name);
519ae255 3206 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3207 goto out;
3208 }
533eb461
AA		 3209 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3210 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3211
533eb461 3212 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3213 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3214 memset(fhandle, 0, sizeof(struct nfs_fh));
3215out:
3216 if (page)
3217 __free_page(page);
5d7ca35a 3218 kfree(locations);
6b97fd3d
MN		 3219 return status;
3220}
3221
1775fd3e
DQ		 3222static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3223 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3224{
3225 struct nfs4_getattr_arg args = {
3226 .fh = fhandle,
3227 .bitmask = server->attr_bitmask,
3228 };
3229 struct nfs4_getattr_res res = {
3230 .fattr = fattr,
1775fd3e 3231 .label = label,
1da177e4
LT		 3232 .server = server,
3233 };
3234 struct rpc_message msg = {
3235 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3236 .rpc_argp = &args,
3237 .rpc_resp = &res,
3238 };
aa9c2669
DQ		 3239
3240 args.bitmask = nfs4_bitmask(server, label);
3241
0e574af1 3242 nfs_fattr_init(fattr);
7c513058 3243 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3244}
3245
1775fd3e
DQ		 3246static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3247 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3248{
3249 struct nfs4_exception exception = { };
3250 int err;
3251 do {
b5f875a9
TM		 3252 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3253 trace_nfs4_getattr(server, fhandle, fattr, err);
3254 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3255 &exception);
3256 } while (exception.retry);
3257 return err;
3258}
3259
3260/*
3261 * The file is not closed if it is opened due to the a request to change
3262 * the size of the file. The open call will not be needed once the
3263 * VFS layer lookup-intents are implemented.
3264 *
3265 * Close is called when the inode is destroyed.
3266 * If we haven't opened the file for O_WRONLY, we
3267 * need to in the size_change case to obtain a stateid.
3268 *
3269 * Got race?
3270 * Because OPEN is always done by name in nfsv4, it is
3271 * possible that we opened a different file by the same
3272 * name. We can recognize this race condition, but we
3273 * can't do anything about it besides returning an error.
3274 *
3275 * This will be fixed with VFS changes (lookup-intent).
3276 */
3277static int
3278nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3279 struct iattr *sattr)
3280{
2b0143b5 3281 struct inode *inode = d_inode(dentry);
659bfcd6 3282 struct rpc_cred *cred = NULL;
d530838b 3283 struct nfs4_state *state = NULL;
14c43f76 3284 struct nfs4_label *label = NULL;
1da177e4
LT		 3285 int status;
3286
88ac815c
PT		 3287 if (pnfs_ld_layoutret_on_setattr(inode) &&
3288 sattr->ia_valid & ATTR_SIZE &&
3289 sattr->ia_size < i_size_read(inode))
24028672 3290 pnfs_commit_and_return_layout(inode);
8a1636c4 3291
0e574af1 3292 nfs_fattr_init(fattr);
1da177e4 3293
2669940d
AA		 3294 /* Deal with open(O_TRUNC) */
3295 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3296 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3297
3298 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3299 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3300 return 0;
3301
d530838b 3302 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3303 if (sattr->ia_valid & ATTR_FILE) {
3304 struct nfs_open_context *ctx;
3305
3306 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3307 if (ctx) {
3308 cred = ctx->cred;
3309 state = ctx->state;
3310 }
659bfcd6 3311 }
08e9eac4 3312
14c43f76
DQ		 3313 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3314 if (IS_ERR(label))
3315 return PTR_ERR(label);
3316
3317 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3318 if (status == 0) {
f044636d 3319 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3320 nfs_setsecurity(inode, fattr, label);
3321 }
14c43f76 3322 nfs4_label_free(label);
1da177e4
LT		 3323 return status;
3324}
3325
0c2e53f1
TM		 3326static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3327 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3328 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3329{
0c2e53f1 3330 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3331 int status;
3332 struct nfs4_lookup_arg args = {
3333 .bitmask = server->attr_bitmask,
0c2e53f1 3334 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3335 .name = name,
3336 };
3337 struct nfs4_lookup_res res = {
3338 .server = server,
3339 .fattr = fattr,
aa9c2669 3340 .label = label,
2b3de441
DH		 3341 .fh = fhandle,
3342 };
3343 struct rpc_message msg = {
3344 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3345 .rpc_argp = &args,
3346 .rpc_resp = &res,
3347 };
3348
aa9c2669
DQ		 3349 args.bitmask = nfs4_bitmask(server, label);
3350
2b3de441
DH		 3351 nfs_fattr_init(fattr);
3352
1da177e4 3353 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3354 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3355 dprintk("NFS reply lookup: %d\n", status);
3356 return status;
3357}
3358
72de53ec 3359static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3360{
7ebb9315 3361 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3362 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3363 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3364 fattr->nlink = 2;
3365}
3366
72de53ec
BS		 3367static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3368 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3369 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3370{
3371 struct nfs4_exception exception = { };
72de53ec 3372 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3373 int err;
3374 do {
1775fd3e 3375 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3376 trace_nfs4_lookup(dir, name, err);
72de53ec 3377 switch (err) {
08ef7bd3 3378 case -NFS4ERR_BADNAME:
72de53ec
BS		 3379 err = -ENOENT;
3380 goto out;
0c2e53f1 3381 case -NFS4ERR_MOVED:
f05d147f 3382 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3383 if (err == -NFS4ERR_MOVED)
3384 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3385 goto out;
0c2e53f1 3386 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3387 err = -EPERM;
3388 if (client != *clnt)
3389 goto out;
66b06860 3390 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3391 if (IS_ERR(client))
3392 return PTR_ERR(client);
3393
3394 exception.retry = 1;
3395 break;
3396 default:
3397 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3398 }
1da177e4 3399 } while (exception.retry);
72de53ec
BS		 3400
3401out:
3402 if (err == 0)
3403 *clnt = client;
3404 else if (client != *clnt)
3405 rpc_shutdown_client(client);
3406
1da177e4
LT		 3407 return err;
3408}
3409
80a16b21 3410static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3411 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3412 struct nfs4_label *label)
72de53ec
BS		 3413{
3414 int status;
3415 struct rpc_clnt *client = NFS_CLIENT(dir);
3416
1775fd3e 3417 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3418 if (client != NFS_CLIENT(dir)) {
3419 rpc_shutdown_client(client);
3420 nfs_fixup_secinfo_attributes(fattr);
3421 }
3422 return status;
3423}
3424
f05d147f
BS		 3425struct rpc_clnt *
3426nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3427 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3428{
b72888cb 3429 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3430 int status;
f05d147f 3431
1775fd3e 3432 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3433 if (status < 0)
f05d147f 3434 return ERR_PTR(status);
b72888cb 3435 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3436}
3437
1da177e4
LT		 3438static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3439{
76b32999 3440 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3441 struct nfs4_accessargs args = {
3442 .fh = NFS_FH(inode),
a4980e78 3443 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3444 };
3445 struct nfs4_accessres res = {
3446 .server = server,
1da177e4 3447 };
1da177e4
LT		 3448 struct rpc_message msg = {
3449 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3450 .rpc_argp = &args,
3451 .rpc_resp = &res,
3452 .rpc_cred = entry->cred,
3453 };
3454 int mode = entry->mask;
aa9c2669 3455 int status = 0;
1da177e4
LT		 3456
3457 /*
3458 * Determine which access bits we want to ask for...
3459 */
3460 if (mode & MAY_READ)
3461 args.access |= NFS4_ACCESS_READ;
3462 if (S_ISDIR(inode->i_mode)) {
3463 if (mode & MAY_WRITE)
3464 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3465 if (mode & MAY_EXEC)
3466 args.access |= NFS4_ACCESS_LOOKUP;
3467 } else {
3468 if (mode & MAY_WRITE)
3469 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3470 if (mode & MAY_EXEC)
3471 args.access |= NFS4_ACCESS_EXECUTE;
3472 }
c407d41a
TM		 3473
3474 res.fattr = nfs_alloc_fattr();
3475 if (res.fattr == NULL)
3476 return -ENOMEM;
3477
7c513058 3478 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3479 if (!status) {
6168f62c 3480 nfs_access_set_mask(entry, res.access);
c407d41a 3481 nfs_refresh_inode(inode, res.fattr);
1da177e4 3482 }
c407d41a 3483 nfs_free_fattr(res.fattr);
1da177e4
LT		 3484 return status;
3485}
3486
3487static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3488{
3489 struct nfs4_exception exception = { };
3490 int err;
3491 do {
c1578b76
TM		 3492 err = _nfs4_proc_access(inode, entry);
3493 trace_nfs4_access(inode, err);
3494 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3495 &exception);
3496 } while (exception.retry);
3497 return err;
3498}
3499
3500/*
3501 * TODO: For the time being, we don't try to get any attributes
3502 * along with any of the zero-copy operations READ, READDIR,
3503 * READLINK, WRITE.
3504 *
3505 * In the case of the first three, we want to put the GETATTR
3506 * after the read-type operation -- this is because it is hard
3507 * to predict the length of a GETATTR response in v4, and thus
3508 * align the READ data correctly. This means that the GETATTR
3509 * may end up partially falling into the page cache, and we should
3510 * shift it into the 'tail' of the xdr_buf before processing.
3511 * To do this efficiently, we need to know the total length
3512 * of data received, which doesn't seem to be available outside
3513 * of the RPC layer.
3514 *
3515 * In the case of WRITE, we also want to put the GETATTR after
3516 * the operation -- in this case because we want to make sure
140150db 3517 * we get the post-operation mtime and size.
1da177e4
LT		 3518 *
3519 * Both of these changes to the XDR layer would in fact be quite
3520 * minor, but I decided to leave them for a subsequent patch.
3521 */
3522static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3523 unsigned int pgbase, unsigned int pglen)
3524{
3525 struct nfs4_readlink args = {
3526 .fh = NFS_FH(inode),
3527 .pgbase = pgbase,
3528 .pglen = pglen,
3529 .pages = &page,
3530 };
f50c7000 3531 struct nfs4_readlink_res res;
1da177e4
LT		 3532 struct rpc_message msg = {
3533 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3534 .rpc_argp = &args,
f50c7000 3535 .rpc_resp = &res,
1da177e4
LT		 3536 };
3537
7c513058 3538 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3539}
3540
3541static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3542 unsigned int pgbase, unsigned int pglen)
3543{
3544 struct nfs4_exception exception = { };
3545 int err;
3546 do {
c1578b76
TM		 3547 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3548 trace_nfs4_readlink(inode, err);
3549 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3550 &exception);
3551 } while (exception.retry);
3552 return err;
3553}
3554
1da177e4 3555/*
8867fe58 3556 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3557 */
1da177e4
LT		 3558static int
3559nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3560 int flags)
1da177e4 3561{
aa9c2669 3562 struct nfs4_label l, *ilabel = NULL;
8867fe58 3563 struct nfs_open_context *ctx;
1da177e4 3564 struct nfs4_state *state;
5bc2afc2 3565 int opened = 0;
1da177e4
LT		 3566 int status = 0;
3567
8867fe58
MS		 3568 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3569 if (IS_ERR(ctx))
3570 return PTR_ERR(ctx);
3571
aa9c2669
DQ		 3572 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3573
a8a5da99 3574 sattr->ia_mode &= ~current_umask();
5bc2afc2 3575 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3576 if (IS_ERR(state)) {
3577 status = PTR_ERR(state);
c0204fd2 3578 goto out;
1da177e4 3579 }
1da177e4 3580out:
aa9c2669 3581 nfs4_label_release_security(ilabel);
8867fe58 3582 put_nfs_open_context(ctx);
1da177e4
LT		 3583 return status;
3584}
3585
3586static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3587{
16e42959 3588 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3589 struct nfs_removeargs args = {
1da177e4 3590 .fh = NFS_FH(dir),
26fe5750 3591 .name = *name,
16e42959 3592 };
4fdc17b2 3593 struct nfs_removeres res = {
16e42959 3594 .server = server,
1da177e4 3595 };
1da177e4 3596 struct rpc_message msg = {
4fdc17b2
TM		 3597 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3598 .rpc_argp = &args,
3599 .rpc_resp = &res,
1da177e4 3600 };
778d2817 3601 int status;
1da177e4 3602
7c513058 3603 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3604 if (status == 0)
16e42959 3605 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3606 return status;
3607}
3608
3609static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3610{
3611 struct nfs4_exception exception = { };
3612 int err;
3613 do {
078ea3df
TM		 3614 err = _nfs4_proc_remove(dir, name);
3615 trace_nfs4_remove(dir, name, err);
3616 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3617 &exception);
3618 } while (exception.retry);
3619 return err;
3620}
3621
e4eff1a6 3622static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3623{
e4eff1a6
TM		 3624 struct nfs_server *server = NFS_SERVER(dir);
3625 struct nfs_removeargs *args = msg->rpc_argp;
3626 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3627
e4eff1a6 3628 res->server = server;
1da177e4 3629 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3630 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3631
3632 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3633}
3634
34e137cc
BS		 3635static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3636{
d9afbd1b
TM		 3637 nfs4_setup_sequence(NFS_SERVER(data->dir),
3638 &data->args.seq_args,
3639 &data->res.seq_res,
3640 task);
1da177e4
LT		 3641}
3642
e4eff1a6 3643static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3644{
078ea3df
TM		 3645 struct nfs_unlinkdata *data = task->tk_calldata;
3646 struct nfs_removeres *res = &data->res;
e4eff1a6 3647
14516c3a
TM		 3648 if (!nfs4_sequence_done(task, &res->seq_res))
3649 return 0;
8478eaa1
N		 3650 if (nfs4_async_handle_error(task, res->server, NULL,
3651 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3652 return 0;
3653 update_changeattr(dir, &res->cinfo);
e4eff1a6 3654 return 1;
1da177e4
LT		 3655}
3656
d3d4152a
JL		 3657static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3658{
3659 struct nfs_server *server = NFS_SERVER(dir);
3660 struct nfs_renameargs *arg = msg->rpc_argp;
3661 struct nfs_renameres *res = msg->rpc_resp;
3662
3663 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3664 res->server = server;
a9c92d6b 3665 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3666}
3667
c6bfa1a1
BS		 3668static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3669{
d9afbd1b
TM		 3670 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3671 &data->args.seq_args,
3672 &data->res.seq_res,
3673 task);
d3d4152a
JL		 3674}
3675
3676static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3677 struct inode *new_dir)
3678{
fbc6f7c2
TM		 3679 struct nfs_renamedata *data = task->tk_calldata;
3680 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3681
3682 if (!nfs4_sequence_done(task, &res->seq_res))
3683 return 0;
8478eaa1 3684 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3685 return 0;
3686
3687 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3688 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3689 return 1;
3690}
3691
1da177e4
LT		 3692static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3693{
91ba2eee 3694 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3695 struct nfs4_link_arg arg = {
3696 .fh = NFS_FH(inode),
3697 .dir_fh = NFS_FH(dir),
3698 .name = name,
91ba2eee
TM		 3699 .bitmask = server->attr_bitmask,
3700 };
91ba2eee
TM		 3701 struct nfs4_link_res res = {
3702 .server = server,
1775fd3e 3703 .label = NULL,
1da177e4 3704 };
1da177e4
LT		 3705 struct rpc_message msg = {
3706 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3707 .rpc_argp = &arg,
91ba2eee 3708 .rpc_resp = &res,
1da177e4 3709 };
136f2627
TM		 3710 int status = -ENOMEM;
3711
3712 res.fattr = nfs_alloc_fattr();
778d2817 3713 if (res.fattr == NULL)
136f2627 3714 goto out;
1da177e4 3715
14c43f76
DQ		 3716 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3717 if (IS_ERR(res.label)) {
3718 status = PTR_ERR(res.label);
3719 goto out;
3720 }
aa9c2669 3721 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3722
7c513058 3723 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3724 if (!status) {
3725 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3726 status = nfs_post_op_update_inode(inode, res.fattr);
3727 if (!status)
3728 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3729 }
14c43f76
DQ		 3730
3731
3732 nfs4_label_free(res.label);
3733
136f2627 3734out:
136f2627 3735 nfs_free_fattr(res.fattr);
1da177e4
LT		 3736 return status;
3737}
3738
3739static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3740{
3741 struct nfs4_exception exception = { };
3742 int err;
3743 do {
3744 err = nfs4_handle_exception(NFS_SERVER(inode),
3745 _nfs4_proc_link(inode, dir, name),
3746 &exception);
3747 } while (exception.retry);
3748 return err;
3749}
3750
57dc9a57
TM		 3751struct nfs4_createdata {
3752 struct rpc_message msg;
3753 struct nfs4_create_arg arg;
3754 struct nfs4_create_res res;
3755 struct nfs_fh fh;
3756 struct nfs_fattr fattr;
1775fd3e 3757 struct nfs4_label *label;
57dc9a57
TM		 3758};
3759
3760static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3761 struct qstr *name, struct iattr *sattr, u32 ftype)
3762{
3763 struct nfs4_createdata *data;
3764
3765 data = kzalloc(sizeof(*data), GFP_KERNEL);
3766 if (data != NULL) {
3767 struct nfs_server *server = NFS_SERVER(dir);
3768
14c43f76
DQ		 3769 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3770 if (IS_ERR(data->label))
3771 goto out_free;
3772
57dc9a57
TM		 3773 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3774 data->msg.rpc_argp = &data->arg;
3775 data->msg.rpc_resp = &data->res;
3776 data->arg.dir_fh = NFS_FH(dir);
3777 data->arg.server = server;
3778 data->arg.name = name;
3779 data->arg.attrs = sattr;
3780 data->arg.ftype = ftype;
aa9c2669 3781 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3782 data->res.server = server;
3783 data->res.fh = &data->fh;
3784 data->res.fattr = &data->fattr;
1775fd3e 3785 data->res.label = data->label;
57dc9a57 3786 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3787 }
3788 return data;
14c43f76
DQ		 3789out_free:
3790 kfree(data);
3791 return NULL;
57dc9a57
TM		 3792}
3793
3794static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3795{
7c513058 3796 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3797 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3798 if (status == 0) {
3799 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3800 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3801 }
3802 return status;
3803}
3804
3805static void nfs4_free_createdata(struct nfs4_createdata *data)
3806{
14c43f76 3807 nfs4_label_free(data->label);
57dc9a57
TM		 3808 kfree(data);
3809}
3810
4f390c15 3811static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3812 struct page *page, unsigned int len, struct iattr *sattr,
3813 struct nfs4_label *label)
1da177e4 3814{
57dc9a57
TM		 3815 struct nfs4_createdata *data;
3816 int status = -ENAMETOOLONG;
1da177e4 3817
94a6d753 3818 if (len > NFS4_MAXPATHLEN)
57dc9a57 3819 goto out;
4f390c15 3820
57dc9a57
TM		 3821 status = -ENOMEM;
3822 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3823 if (data == NULL)
3824 goto out;
3825
3826 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3827 data->arg.u.symlink.pages = &page;
3828 data->arg.u.symlink.len = len;
1775fd3e 3829 data->arg.label = label;
1da177e4 3830
57dc9a57
TM		 3831 status = nfs4_do_create(dir, dentry, data);
3832
3833 nfs4_free_createdata(data);
3834out:
1da177e4
LT		 3835 return status;
3836}
3837
4f390c15 3838static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3839 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3840{
3841 struct nfs4_exception exception = { };
aa9c2669 3842 struct nfs4_label l, *label = NULL;
1da177e4 3843 int err;
aa9c2669
DQ		 3844
3845 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3846
1da177e4 3847 do {
078ea3df
TM		 3848 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3849 trace_nfs4_symlink(dir, &dentry->d_name, err);
3850 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3851 &exception);
3852 } while (exception.retry);
aa9c2669
DQ		 3853
3854 nfs4_label_release_security(label);
1da177e4
LT		 3855 return err;
3856}
3857
3858static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3859 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3860{
57dc9a57
TM		 3861 struct nfs4_createdata *data;
3862 int status = -ENOMEM;
1da177e4 3863
57dc9a57
TM		 3864 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3865 if (data == NULL)
3866 goto out;
3867
1775fd3e 3868 data->arg.label = label;
57dc9a57
TM		 3869 status = nfs4_do_create(dir, dentry, data);
3870
3871 nfs4_free_createdata(data);
3872out:
1da177e4
LT		 3873 return status;
3874}
3875
3876static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3877 struct iattr *sattr)
3878{
3879 struct nfs4_exception exception = { };
aa9c2669 3880 struct nfs4_label l, *label = NULL;
1da177e4 3881 int err;
a8a5da99 3882
aa9c2669
DQ		 3883 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3884
a8a5da99 3885 sattr->ia_mode &= ~current_umask();
1da177e4 3886 do {
078ea3df
TM		 3887 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3888 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3889 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3890 &exception);
3891 } while (exception.retry);
aa9c2669
DQ		 3892 nfs4_label_release_security(label);
3893
1da177e4
LT		 3894 return err;
3895}
3896
3897static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3898 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4 3899{
2b0143b5 3900 struct inode *dir = d_inode(dentry);
1da177e4
LT		 3901 struct nfs4_readdir_arg args = {
3902 .fh = NFS_FH(dir),
56e4ebf8 3903 .pages = pages,
1da177e4
LT		 3904 .pgbase = 0,
3905 .count = count,
2b0143b5 3906 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 3907 .plus = plus,
1da177e4
LT		 3908 };
3909 struct nfs4_readdir_res res;
3910 struct rpc_message msg = {
3911 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3912 .rpc_argp = &args,
3913 .rpc_resp = &res,
3914 .rpc_cred = cred,
3915 };
3916 int status;
3917
6de1472f
AV		 3918 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3919 dentry,
eadf4598 3920 (unsigned long long)cookie);
c3f52af3 3921 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3922 res.pgbase = args.pgbase;
7c513058 3923 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3924 if (status >= 0) {
c3f52af3 3925 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3926 status += args.pgbase;
3927 }
c4812998
TM		 3928
3929 nfs_invalidate_atime(dir);
3930
3110ff80 3931 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3932 return status;
3933}
3934
3935static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3936 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3937{
3938 struct nfs4_exception exception = { };
3939 int err;
3940 do {
c1578b76
TM		 3941 err = _nfs4_proc_readdir(dentry, cred, cookie,
3942 pages, count, plus);
2b0143b5
DH		 3943 trace_nfs4_readdir(d_inode(dentry), err);
3944 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 3945 &exception);
3946 } while (exception.retry);
3947 return err;
3948}
3949
3950static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3951 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3952{
57dc9a57
TM		 3953 struct nfs4_createdata *data;
3954 int mode = sattr->ia_mode;
3955 int status = -ENOMEM;
1da177e4 3956
57dc9a57
TM		 3957 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3958 if (data == NULL)
3959 goto out;
3960
1da177e4 3961 if (S_ISFIFO(mode))
57dc9a57 3962 data->arg.ftype = NF4FIFO;
1da177e4 3963 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3964 data->arg.ftype = NF4BLK;
3965 data->arg.u.device.specdata1 = MAJOR(rdev);
3966 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3967 }
3968 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3969 data->arg.ftype = NF4CHR;
3970 data->arg.u.device.specdata1 = MAJOR(rdev);
3971 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3972 } else if (!S_ISSOCK(mode)) {
3973 status = -EINVAL;
3974 goto out_free;
1da177e4 3975 }
1775fd3e 3976
aa9c2669 3977 data->arg.label = label;
57dc9a57 3978 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3979out_free:
57dc9a57
TM		 3980 nfs4_free_createdata(data);
3981out:
1da177e4
LT		 3982 return status;
3983}
3984
3985static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3986 struct iattr *sattr, dev_t rdev)
3987{
3988 struct nfs4_exception exception = { };
aa9c2669 3989 struct nfs4_label l, *label = NULL;
1da177e4 3990 int err;
a8a5da99 3991
aa9c2669
DQ		 3992 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3993
a8a5da99 3994 sattr->ia_mode &= ~current_umask();
1da177e4 3995 do {
078ea3df
TM		 3996 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3997 trace_nfs4_mknod(dir, &dentry->d_name, err);
3998 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3999 &exception);
4000 } while (exception.retry);
aa9c2669
DQ		 4001
4002 nfs4_label_release_security(label);
4003
1da177e4
LT		 4004 return err;
4005}
4006
4007static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
4008 struct nfs_fsstat *fsstat)
4009{
4010 struct nfs4_statfs_arg args = {
4011 .fh = fhandle,
4012 .bitmask = server->attr_bitmask,
4013 };
24ad148a
BH		 4014 struct nfs4_statfs_res res = {
4015 .fsstat = fsstat,
4016 };
1da177e4
LT		 4017 struct rpc_message msg = {
4018 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4019 .rpc_argp = &args,
24ad148a 4020 .rpc_resp = &res,
1da177e4
LT		 4021 };
4022
0e574af1 4023 nfs_fattr_init(fsstat->fattr);
7c513058 4024 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4025}
4026
4027static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4028{
4029 struct nfs4_exception exception = { };
4030 int err;
4031 do {
4032 err = nfs4_handle_exception(server,
4033 _nfs4_proc_statfs(server, fhandle, fsstat),
4034 &exception);
4035 } while (exception.retry);
4036 return err;
4037}
4038
4039static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4040 struct nfs_fsinfo *fsinfo)
4041{
4042 struct nfs4_fsinfo_arg args = {
4043 .fh = fhandle,
4044 .bitmask = server->attr_bitmask,
4045 };
3dda5e43
BH		 4046 struct nfs4_fsinfo_res res = {
4047 .fsinfo = fsinfo,
4048 };
1da177e4
LT		 4049 struct rpc_message msg = {
4050 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4051 .rpc_argp = &args,
3dda5e43 4052 .rpc_resp = &res,
1da177e4
LT		 4053 };
4054
7c513058 4055 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4056}
4057
4058static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4059{
4060 struct nfs4_exception exception = { };
83ca7f5a 4061 unsigned long now = jiffies;
1da177e4
LT		 4062 int err;
4063
4064 do {
83ca7f5a 4065 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4066 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 4067 if (err == 0) {
4068 struct nfs_client *clp = server->nfs_client;
4069
4070 spin_lock(&clp->cl_lock);
4071 clp->cl_lease_time = fsinfo->lease_time * HZ;
4072 clp->cl_last_renewal = now;
4073 spin_unlock(&clp->cl_lock);
4074 break;
4075 }
4076 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4077 } while (exception.retry);
4078 return err;
4079}
4080
4081static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4082{
e38eb650
BS		 4083 int error;
4084
0e574af1 4085 nfs_fattr_init(fsinfo->fattr);
e38eb650 4086 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4087 if (error == 0) {
4088 /* block layout checks this! */
4089 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4090 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4091 }
e38eb650
BS		 4092
4093 return error;
1da177e4
LT		 4094}
4095
4096static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4097 struct nfs_pathconf *pathconf)
4098{
4099 struct nfs4_pathconf_arg args = {
4100 .fh = fhandle,
4101 .bitmask = server->attr_bitmask,
4102 };
d45b2989
BH		 4103 struct nfs4_pathconf_res res = {
4104 .pathconf = pathconf,
4105 };
1da177e4
LT		 4106 struct rpc_message msg = {
4107 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4108 .rpc_argp = &args,
d45b2989 4109 .rpc_resp = &res,
1da177e4
LT		 4110 };
4111
4112 /* None of the pathconf attributes are mandatory to implement */
4113 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4114 memset(pathconf, 0, sizeof(*pathconf));
4115 return 0;
4116 }
4117
0e574af1 4118 nfs_fattr_init(pathconf->fattr);
7c513058 4119 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4120}
4121
4122static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4123 struct nfs_pathconf *pathconf)
4124{
4125 struct nfs4_exception exception = { };
4126 int err;
4127
4128 do {
4129 err = nfs4_handle_exception(server,
4130 _nfs4_proc_pathconf(server, fhandle, pathconf),
4131 &exception);
4132 } while (exception.retry);
4133 return err;
4134}
4135
5521abfd 4136int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4137 const struct nfs_open_context *ctx,
4138 const struct nfs_lock_context *l_ctx,
4139 fmode_t fmode)
4140{
4141 const struct nfs_lockowner *lockowner = NULL;
4142
4143 if (l_ctx != NULL)
4144 lockowner = &l_ctx->lockowner;
5521abfd 4145 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4146}
4147EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4148
5521abfd
TM		 4149static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4150 const struct nfs_open_context *ctx,
4151 const struct nfs_lock_context *l_ctx,
4152 fmode_t fmode)
4153{
4154 nfs4_stateid current_stateid;
4155
e1253be0
TM		 4156 /* If the current stateid represents a lost lock, then exit */
4157 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4158 return true;
5521abfd
TM		 4159 return nfs4_stateid_match(stateid, &current_stateid);
4160}
4161
4162static bool nfs4_error_stateid_expired(int err)
4163{
4164 switch (err) {
4165 case -NFS4ERR_DELEG_REVOKED:
4166 case -NFS4ERR_ADMIN_REVOKED:
4167 case -NFS4ERR_BAD_STATEID:
4168 case -NFS4ERR_STALE_STATEID:
4169 case -NFS4ERR_OLD_STATEID:
4170 case -NFS4ERR_OPENMODE:
4171 case -NFS4ERR_EXPIRED:
4172 return true;
4173 }
4174 return false;
4175}
4176
d45f60c6 4177void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4178{
d45f60c6 4179 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4180}
4181
d45f60c6 4182static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4183{
d45f60c6 4184 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4185
d45f60c6
WAA		 4186 trace_nfs4_read(hdr, task->tk_status);
4187 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4188 hdr->args.context->state,
4189 NULL) == -EAGAIN) {
d00c5d43 4190 rpc_restart_call_prepare(task);
ec06c096 4191 return -EAGAIN;
1da177e4 4192 }
8850df99 4193
d45f60c6 4194 __nfs4_read_done_cb(hdr);
1da177e4 4195 if (task->tk_status > 0)
d45f60c6 4196 renew_lease(server, hdr->timestamp);
ec06c096 4197 return 0;
1da177e4
LT		 4198}
4199
5521abfd 4200static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4201 struct nfs_pgio_args *args)
5521abfd
TM		 4202{
4203
4204 if (!nfs4_error_stateid_expired(task->tk_status) ||
4205 nfs4_stateid_is_current(&args->stateid,
4206 args->context,
4207 args->lock_context,
4208 FMODE_READ))
4209 return false;
4210 rpc_restart_call_prepare(task);
4211 return true;
4212}
4213
d45f60c6 4214static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4215{
4216
4217 dprintk("--> %s\n", __func__);
4218
d45f60c6 4219 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4220 return -EAGAIN;
d45f60c6 4221 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4222 return -EAGAIN;
d45f60c6
WAA		 4223 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4224 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4225}
4226
d45f60c6
WAA		 4227static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4228 struct rpc_message *msg)
1da177e4 4229{
d45f60c6
WAA		 4230 hdr->timestamp = jiffies;
4231 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4232 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4233 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4234}
4235
d45f60c6
WAA		 4236static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4237 struct nfs_pgio_header *hdr)
ea7c3303 4238{
d45f60c6
WAA		 4239 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4240 &hdr->args.seq_args,
4241 &hdr->res.seq_res,
9b206149 4242 task))
ef1820f9 4243 return 0;
d45f60c6
WAA		 4244 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4245 hdr->args.lock_context,
4246 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4247 return -EIO;
d45f60c6 4248 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4249 return -EIO;
4250 return 0;
1da177e4
LT		 4251}
4252
d45f60c6
WAA		 4253static int nfs4_write_done_cb(struct rpc_task *task,
4254 struct nfs_pgio_header *hdr)
1da177e4 4255{
d45f60c6 4256 struct inode *inode = hdr->inode;
8478eaa1 4257
d45f60c6
WAA		 4258 trace_nfs4_write(hdr, task->tk_status);
4259 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4260 hdr->args.context->state,
4261 NULL) == -EAGAIN) {
d00c5d43 4262 rpc_restart_call_prepare(task);
788e7a89 4263 return -EAGAIN;
1da177e4 4264 }
4f9838c7 4265 if (task->tk_status >= 0) {
d45f60c6 4266 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4267 nfs_writeback_update_inode(hdr);
4f9838c7 4268 }
788e7a89 4269 return 0;
1da177e4
LT		 4270}
4271
5521abfd 4272static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4273 struct nfs_pgio_args *args)
5521abfd
TM		 4274{
4275
4276 if (!nfs4_error_stateid_expired(task->tk_status) ||
4277 nfs4_stateid_is_current(&args->stateid,
4278 args->context,
4279 args->lock_context,
4280 FMODE_WRITE))
4281 return false;
4282 rpc_restart_call_prepare(task);
4283 return true;
4284}
4285
d45f60c6 4286static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4287{
d45f60c6 4288 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4289 return -EAGAIN;
d45f60c6 4290 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4291 return -EAGAIN;
d45f60c6
WAA		 4292 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4293 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4294}
4295
5a37f851 4296static
d45f60c6 4297bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4298{
5a37f851 4299 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4300 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4301 return false;
4302 /* Otherwise, request attributes if and only if we don't hold
4303 * a delegation
4304 */
011e2a7f 4305 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4306}
a69aef14 4307
d45f60c6
WAA		 4308static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4309 struct rpc_message *msg)
1da177e4 4310{
d45f60c6 4311 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4312
d45f60c6
WAA		 4313 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4314 hdr->args.bitmask = NULL;
4315 hdr->res.fattr = NULL;
7ffd1064 4316 } else
d45f60c6 4317 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4318
d45f60c6
WAA		 4319 if (!hdr->pgio_done_cb)
4320 hdr->pgio_done_cb = nfs4_write_done_cb;
4321 hdr->res.server = server;
4322 hdr->timestamp = jiffies;
1da177e4 4323
bdc7f021 4324 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4325 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4326}
4327
0b7c0153 4328static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4329{
d9afbd1b
TM		 4330 nfs4_setup_sequence(NFS_SERVER(data->inode),
4331 &data->args.seq_args,
4332 &data->res.seq_res,
4333 task);
1da177e4
LT		 4334}
4335
0b7c0153 4336static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4337{
1da177e4 4338 struct inode *inode = data->inode;
14516c3a 4339
cc668ab3 4340 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4341 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4342 NULL, NULL) == -EAGAIN) {
d00c5d43 4343 rpc_restart_call_prepare(task);
788e7a89 4344 return -EAGAIN;
1da177e4 4345 }
788e7a89 4346 return 0;
1da177e4
LT		 4347}
4348
0b7c0153 4349static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4350{
4351 if (!nfs4_sequence_done(task, &data->res.seq_res))
4352 return -EAGAIN;
0b7c0153 4353 return data->commit_done_cb(task, data);
5f452431
FI		 4354}
4355
0b7c0153 4356static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4357{
788e7a89 4358 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4359
0b7c0153
FI		 4360 if (data->commit_done_cb == NULL)
4361 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4362 data->res.server = server;
bdc7f021 4363 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4364 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4365}
4366
9bc4e3ca
CL		 4367struct nfs4_renewdata {
4368 struct nfs_client *client;
4369 unsigned long timestamp;
4370};
4371
1da177e4
LT		 4372/*
4373 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4374 * standalone procedure for queueing an asynchronous RENEW.
4375 */
9bc4e3ca 4376static void nfs4_renew_release(void *calldata)
dc96aef9 4377{
9bc4e3ca
CL		 4378 struct nfs4_renewdata *data = calldata;
4379 struct nfs_client *clp = data->client;
dc96aef9 4380
0851de06
AB		 4381 if (atomic_read(&clp->cl_count) > 1)
4382 nfs4_schedule_state_renewal(clp);
4383 nfs_put_client(clp);
9bc4e3ca 4384 kfree(data);
dc96aef9
AB		 4385}
4386
9bc4e3ca 4387static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4388{
9bc4e3ca
CL		 4389 struct nfs4_renewdata *data = calldata;
4390 struct nfs_client *clp = data->client;
4391 unsigned long timestamp = data->timestamp;
1da177e4 4392
c6d01c6f 4393 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4394 switch (task->tk_status) {
4395 case 0:
4396 break;
4397 case -NFS4ERR_LEASE_MOVED:
4398 nfs4_schedule_lease_moved_recovery(clp);
4399 break;
4400 default:
95baa25c 4401 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4402 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4403 return;
4404 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4405 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4406 return;
4407 }
4408 nfs4_schedule_path_down_recovery(clp);
1da177e4 4409 }
452e9352 4410 do_renew_lease(clp, timestamp);
1da177e4
LT		 4411}
4412
963d8fe5
TM		 4413static const struct rpc_call_ops nfs4_renew_ops = {
4414 .rpc_call_done = nfs4_renew_done,
dc96aef9 4415 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4416};
4417
2f60ea6b 4418static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4419{
4420 struct rpc_message msg = {
4421 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4422 .rpc_argp = clp,
b4454fe1 4423 .rpc_cred = cred,
1da177e4 4424 };
9bc4e3ca 4425 struct nfs4_renewdata *data;
1da177e4 4426
2f60ea6b
TM		 4427 if (renew_flags == 0)
4428 return 0;
0851de06
AB		 4429 if (!atomic_inc_not_zero(&clp->cl_count))
4430 return -EIO;
b569ad34 4431 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4432 if (data == NULL)
4433 return -ENOMEM;
4434 data->client = clp;
4435 data->timestamp = jiffies;
bc7a05ca 4436 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4437 &nfs4_renew_ops, data);
1da177e4
LT		 4438}
4439
8534d4ec 4440static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4441{
4442 struct rpc_message msg = {
4443 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4444 .rpc_argp = clp,
b4454fe1 4445 .rpc_cred = cred,
1da177e4
LT		 4446 };
4447 unsigned long now = jiffies;
4448 int status;
4449
bc7a05ca 4450 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4451 if (status < 0)
4452 return status;
452e9352 4453 do_renew_lease(clp, now);
1da177e4
LT		 4454 return 0;
4455}
4456
aa1870af
BF		 4457static inline int nfs4_server_supports_acls(struct nfs_server *server)
4458{
7dd7d959 4459 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4460}
4461
21f498c2
TM		 4462/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4463 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4464 * the stack.
4465 */
21f498c2 4466#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4467
e9e3d724
NH		 4468static int buf_to_pages_noslab(const void *buf, size_t buflen,
4469 struct page **pages, unsigned int *pgbase)
4470{
4471 struct page *newpage, **spages;
4472 int rc = 0;
4473 size_t len;
4474 spages = pages;
4475
4476 do {
21f498c2 4477 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4478 newpage = alloc_page(GFP_KERNEL);
4479
4480 if (newpage == NULL)
4481 goto unwind;
4482 memcpy(page_address(newpage), buf, len);
4483 buf += len;
4484 buflen -= len;
4485 *pages++ = newpage;
4486 rc++;
4487 } while (buflen != 0);
4488
4489 return rc;
4490
4491unwind:
4492 for(; rc > 0; rc--)
4493 __free_page(spages[rc-1]);
4494 return -ENOMEM;
4495}
4496
e50a1c2e
BF		 4497struct nfs4_cached_acl {
4498 int cached;
4499 size_t len;
3e9d4154 4500 char data[0];
e50a1c2e
BF		 4501};
4502
4503static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4504{
4505 struct nfs_inode *nfsi = NFS_I(inode);
4506
4507 spin_lock(&inode->i_lock);
4508 kfree(nfsi->nfs4_acl);
4509 nfsi->nfs4_acl = acl;
4510 spin_unlock(&inode->i_lock);
4511}
4512
4513static void nfs4_zap_acl_attr(struct inode *inode)
4514{
4515 nfs4_set_cached_acl(inode, NULL);
4516}
4517
4518static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4519{
4520 struct nfs_inode *nfsi = NFS_I(inode);
4521 struct nfs4_cached_acl *acl;
4522 int ret = -ENOENT;
4523
4524 spin_lock(&inode->i_lock);
4525 acl = nfsi->nfs4_acl;
4526 if (acl == NULL)
4527 goto out;
4528 if (buf == NULL) /* user is just asking for length */
4529 goto out_len;
4530 if (acl->cached == 0)
4531 goto out;
4532 ret = -ERANGE; /* see getxattr(2) man page */
4533 if (acl->len > buflen)
4534 goto out;
4535 memcpy(buf, acl->data, acl->len);
4536out_len:
4537 ret = acl->len;
4538out:
4539 spin_unlock(&inode->i_lock);
4540 return ret;
4541}
4542
5794d21e 4543static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4544{
4545 struct nfs4_cached_acl *acl;
b291f1b1 4546 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4547
1f1ea6c2 4548 if (buflen <= PAGE_SIZE) {
b291f1b1 4549 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4550 if (acl == NULL)
4551 goto out;
4552 acl->cached = 1;
5794d21e 4553 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4554 } else {
4555 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4556 if (acl == NULL)
4557 goto out;
4558 acl->cached = 0;
4559 }
4560 acl->len = acl_len;
4561out:
4562 nfs4_set_cached_acl(inode, acl);
4563}
4564
bf118a34
AA		 4565/*
4566 * The getxattr API returns the required buffer length when called with a
4567 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4568 * the required buf. On a NULL buf, we send a page of data to the server
4569 * guessing that the ACL request can be serviced by a page. If so, we cache
4570 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4571 * the cache. If not so, we throw away the page, and cache the required
4572 * length. The next getxattr call will then produce another round trip to
4573 * the server, this time with the input buf of the required size.
4574 */
16b4289c 4575static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4576{
bf118a34 4577 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4578 struct nfs_getaclargs args = {
4579 .fh = NFS_FH(inode),
4580 .acl_pages = pages,
4581 .acl_len = buflen,
4582 };
663c79b3
BH		 4583 struct nfs_getaclres res = {
4584 .acl_len = buflen,
4585 };
aa1870af
BF		 4586 struct rpc_message msg = {
4587 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4588 .rpc_argp = &args,
663c79b3 4589 .rpc_resp = &res,
aa1870af 4590 };
21f498c2
TM		 4591 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4592 int ret = -ENOMEM, i;
aa1870af 4593
bf118a34
AA		 4594 /* As long as we're doing a round trip to the server anyway,
4595 * let's be prepared for a page of acl data. */
4596 if (npages == 0)
4597 npages = 1;
21f498c2
TM		 4598 if (npages > ARRAY_SIZE(pages))
4599 return -ERANGE;
5a006899 4600
bf118a34
AA		 4601 for (i = 0; i < npages; i++) {
4602 pages[i] = alloc_page(GFP_KERNEL);
4603 if (!pages[i])
4604 goto out_free;
e50a1c2e 4605 }
5a006899
SP		 4606
4607 /* for decoding across pages */
4608 res.acl_scratch = alloc_page(GFP_KERNEL);
4609 if (!res.acl_scratch)
4610 goto out_free;
4611
bf118a34
AA		 4612 args.acl_len = npages * PAGE_SIZE;
4613 args.acl_pgbase = 0;
5a006899 4614
de040bec 4615 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4616 __func__, buf, buflen, npages, args.acl_len);
4617 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4618 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4619 if (ret)
4620 goto out_free;
bf118a34 4621
1f1ea6c2
TM		 4622 /* Handle the case where the passed-in buffer is too short */
4623 if (res.acl_flags & NFS4_ACL_TRUNC) {
4624 /* Did the user only issue a request for the acl length? */
4625 if (buf == NULL)
4626 goto out_ok;
e50a1c2e 4627 ret = -ERANGE;
1f1ea6c2 4628 goto out_free;
e50a1c2e 4629 }
1f1ea6c2 4630 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4631 if (buf) {
4632 if (res.acl_len > buflen) {
4633 ret = -ERANGE;
4634 goto out_free;
4635 }
1f1ea6c2 4636 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4637 }
1f1ea6c2
TM		 4638out_ok:
4639 ret = res.acl_len;
e50a1c2e 4640out_free:
bf118a34
AA		 4641 for (i = 0; i < npages; i++)
4642 if (pages[i])
4643 __free_page(pages[i]);
331818f1
TM		 4644 if (res.acl_scratch)
4645 __free_page(res.acl_scratch);
aa1870af
BF		 4646 return ret;
4647}
4648
16b4289c
TM		 4649static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4650{
4651 struct nfs4_exception exception = { };
4652 ssize_t ret;
4653 do {
4654 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4655 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4656 if (ret >= 0)
4657 break;
4658 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4659 } while (exception.retry);
4660 return ret;
4661}
4662
e50a1c2e
BF		 4663static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4664{
4665 struct nfs_server *server = NFS_SERVER(inode);
4666 int ret;
4667
4668 if (!nfs4_server_supports_acls(server))
4669 return -EOPNOTSUPP;
4670 ret = nfs_revalidate_inode(server, inode);
4671 if (ret < 0)
4672 return ret;
08a22b39
AK		 4673 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4674 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4675 ret = nfs4_read_cached_acl(inode, buf, buflen);
4676 if (ret != -ENOENT)
bf118a34
AA		 4677 /* -ENOENT is returned if there is no ACL or if there is an ACL
4678 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4679 return ret;
4680 return nfs4_get_acl_uncached(inode, buf, buflen);
4681}
4682
16b4289c 4683static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4684{
4685 struct nfs_server *server = NFS_SERVER(inode);
4686 struct page *pages[NFS4ACL_MAXPAGES];
4687 struct nfs_setaclargs arg = {
4688 .fh = NFS_FH(inode),
4689 .acl_pages = pages,
4690 .acl_len = buflen,
4691 };
73c403a9 4692 struct nfs_setaclres res;
4b580ee3
BF		 4693 struct rpc_message msg = {
4694 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4695 .rpc_argp = &arg,
73c403a9 4696 .rpc_resp = &res,
4b580ee3 4697 };
21f498c2 4698 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4699 int ret, i;
4b580ee3
BF		 4700
4701 if (!nfs4_server_supports_acls(server))
4702 return -EOPNOTSUPP;
21f498c2
TM		 4703 if (npages > ARRAY_SIZE(pages))
4704 return -ERANGE;
e9e3d724
NH		 4705 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4706 if (i < 0)
4707 return i;
57ec14c5 4708 nfs4_inode_return_delegation(inode);
7c513058 4709 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4710
4711 /*
4712 * Free each page after tx, so the only ref left is
4713 * held by the network stack
4714 */
4715 for (; i > 0; i--)
4716 put_page(pages[i-1]);
4717
08a22b39
AK		 4718 /*
4719 * Acl update can result in inode attribute update.
4720 * so mark the attribute cache invalid.
4721 */
4722 spin_lock(&inode->i_lock);
4723 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4724 spin_unlock(&inode->i_lock);
f41f7418
TM		 4725 nfs_access_zap_cache(inode);
4726 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4727 return ret;
4728}
4729
16b4289c
TM		 4730static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4731{
4732 struct nfs4_exception exception = { };
4733 int err;
4734 do {
c1578b76
TM		 4735 err = __nfs4_proc_set_acl(inode, buf, buflen);
4736 trace_nfs4_set_acl(inode, err);
4737 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4738 &exception);
4739 } while (exception.retry);
4740 return err;
4741}
4742
aa9c2669
DQ		 4743#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4744static int _nfs4_get_security_label(struct inode *inode, void *buf,
4745 size_t buflen)
4746{
4747 struct nfs_server *server = NFS_SERVER(inode);
4748 struct nfs_fattr fattr;
4749 struct nfs4_label label = {0, 0, buflen, buf};
4750
4751 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4752 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4753 .fh = NFS_FH(inode),
4754 .bitmask = bitmask,
4755 };
4756 struct nfs4_getattr_res res = {
4757 .fattr = &fattr,
4758 .label = &label,
4759 .server = server,
4760 };
4761 struct rpc_message msg = {
4762 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4763 .rpc_argp = &arg,
aa9c2669
DQ		 4764 .rpc_resp = &res,
4765 };
4766 int ret;
4767
4768 nfs_fattr_init(&fattr);
4769
fcb63a9b 4770 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4771 if (ret)
4772 return ret;
4773 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4774 return -ENOENT;
4775 if (buflen < label.len)
4776 return -ERANGE;
4777 return 0;
4778}
4779
4780static int nfs4_get_security_label(struct inode *inode, void *buf,
4781 size_t buflen)
4782{
4783 struct nfs4_exception exception = { };
4784 int err;
4785
4786 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4787 return -EOPNOTSUPP;
4788
4789 do {
c1578b76
TM		 4790 err = _nfs4_get_security_label(inode, buf, buflen);
4791 trace_nfs4_get_security_label(inode, err);
4792 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4793 &exception);
4794 } while (exception.retry);
4795 return err;
4796}
4797
4798static int _nfs4_do_set_security_label(struct inode *inode,
4799 struct nfs4_label *ilabel,
4800 struct nfs_fattr *fattr,
4801 struct nfs4_label *olabel)
4802{
4803
4804 struct iattr sattr = {0};
4805 struct nfs_server *server = NFS_SERVER(inode);
4806 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4807 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4808 .fh = NFS_FH(inode),
4809 .iap = &sattr,
4810 .server = server,
4811 .bitmask = bitmask,
4812 .label = ilabel,
4813 };
4814 struct nfs_setattrres res = {
4815 .fattr = fattr,
4816 .label = olabel,
4817 .server = server,
4818 };
4819 struct rpc_message msg = {
4820 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4821 .rpc_argp = &arg,
aa9c2669
DQ		 4822 .rpc_resp = &res,
4823 };
4824 int status;
4825
12207f69 4826 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4827
12207f69 4828 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4829 if (status)
4830 dprintk("%s failed: %d\n", __func__, status);
4831
4832 return status;
4833}
4834
4835static int nfs4_do_set_security_label(struct inode *inode,
4836 struct nfs4_label *ilabel,
4837 struct nfs_fattr *fattr,
4838 struct nfs4_label *olabel)
4839{
4840 struct nfs4_exception exception = { };
4841 int err;
4842
4843 do {
c1578b76
TM		 4844 err = _nfs4_do_set_security_label(inode, ilabel,
4845 fattr, olabel);
4846 trace_nfs4_set_security_label(inode, err);
4847 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4848 &exception);
4849 } while (exception.retry);
4850 return err;
4851}
4852
4853static int
4854nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4855{
4856 struct nfs4_label ilabel, *olabel = NULL;
4857 struct nfs_fattr fattr;
4858 struct rpc_cred *cred;
2b0143b5 4859 struct inode *inode = d_inode(dentry);
aa9c2669
DQ		 4860 int status;
4861
4862 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4863 return -EOPNOTSUPP;
4864
4865 nfs_fattr_init(&fattr);
4866
4867 ilabel.pi = 0;
4868 ilabel.lfs = 0;
4869 ilabel.label = (char *)buf;
4870 ilabel.len = buflen;
4871
4872 cred = rpc_lookup_cred();
4873 if (IS_ERR(cred))
4874 return PTR_ERR(cred);
4875
4876 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4877 if (IS_ERR(olabel)) {
4878 status = -PTR_ERR(olabel);
4879 goto out;
4880 }
4881
4882 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4883 if (status == 0)
4884 nfs_setsecurity(inode, &fattr, olabel);
4885
4886 nfs4_label_free(olabel);
4887out:
4888 put_rpccred(cred);
4889 return status;
4890}
4891#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4892
4893
1da177e4 4894static int
8478eaa1
N		 4895nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4896 struct nfs4_state *state, long *timeout)
1da177e4 4897{
aa5190d0
TM		 4898 struct nfs_client *clp = server->nfs_client;
4899
4900 if (task->tk_status >= 0)
1da177e4
LT		 4901 return 0;
4902 switch(task->tk_status) {
a1d0b5ee 4903 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4904 case -NFS4ERR_ADMIN_REVOKED:
4905 case -NFS4ERR_BAD_STATEID:
4906 case -NFS4ERR_OPENMODE:
4907 if (state == NULL)
4908 break;
5d422301 4909 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4910 goto recovery_failed;
0400a6b0 4911 goto wait_on_recovery;
0ced63d1 4912 case -NFS4ERR_EXPIRED:
5d422301
TM		 4913 if (state != NULL) {
4914 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4915 goto recovery_failed;
5d422301 4916 }
1da177e4 4917 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4918 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4919 nfs4_schedule_lease_recovery(clp);
4920 goto wait_on_recovery;
519ae255
CL		 4921 case -NFS4ERR_MOVED:
4922 if (nfs4_schedule_migration_recovery(server) < 0)
4923 goto recovery_failed;
4924 goto wait_on_recovery;
8ef2f8d4
CL		 4925 case -NFS4ERR_LEASE_MOVED:
4926 nfs4_schedule_lease_moved_recovery(clp);
4927 goto wait_on_recovery;
4745e315
AA		 4928#if defined(CONFIG_NFS_V4_1)
4929 case -NFS4ERR_BADSESSION:
4930 case -NFS4ERR_BADSLOT:
4931 case -NFS4ERR_BAD_HIGH_SLOT:
4932 case -NFS4ERR_DEADSESSION:
4933 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4934 case -NFS4ERR_SEQ_FALSE_RETRY:
4935 case -NFS4ERR_SEQ_MISORDERED:
4936 dprintk("%s ERROR %d, Reset session\n", __func__,
4937 task->tk_status);
9f594791 4938 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 4939 goto wait_on_recovery;
4745e315 4940#endif /* CONFIG_NFS_V4_1 */
1da177e4 4941 case -NFS4ERR_DELAY:
aa5190d0 4942 nfs_inc_server_stats(server, NFSIOS_DELAY);
8478eaa1
N		 4943 rpc_delay(task, nfs4_update_delay(timeout));
4944 goto restart_call;
006ea73e 4945 case -NFS4ERR_GRACE:
1da177e4 4946 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4947 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4948 case -NFS4ERR_OLD_STATEID:
f1478c13 4949 goto restart_call;
1da177e4
LT		 4950 }
4951 task->tk_status = nfs4_map_errors(task->tk_status);
4952 return 0;
9f51a78e 4953recovery_failed:
5d422301
TM		 4954 task->tk_status = -EIO;
4955 return 0;
0400a6b0 4956wait_on_recovery:
a2c0b9e2 4957 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4958 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4959 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4960 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4961 goto recovery_failed;
f1478c13 4962restart_call:
a2c0b9e2
TM		 4963 task->tk_status = 0;
4964 return -EAGAIN;
1da177e4
LT		 4965}
4966
f092075d
CL		 4967static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4968 nfs4_verifier *bootverf)
cd93710e
CL		 4969{
4970 __be32 verf[2];
4971
2c820d9a
CL		 4972 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4973 /* An impossible timestamp guarantees this value
4974 * will never match a generated boot time. */
4975 verf[0] = 0;
17f26b12 4976 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4977 } else {
f092075d 4978 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4979 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4980 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4981 }
cd93710e
CL		 4982 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4983}
4984
a3192688
JL		 4985static int
4986nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 4987{
a3192688
JL		 4988 int result;
4989 size_t len;
4990 char *str;
4991 bool retried = false;
e984a55a 4992
ceb3a16c 4993 if (clp->cl_owner_id != NULL)
a3192688
JL		 4994 return 0;
4995retry:
4996 rcu_read_lock();
4997 len = 10 + strlen(clp->cl_ipaddr) + 1 +
4998 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
4999 1 +
5000 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
5001 1;
5002 rcu_read_unlock();
5003
5004 if (len > NFS4_OPAQUE_LIMIT + 1)
5005 return -EINVAL;
5006
5007 /*
5008 * Since this string is allocated at mount time, and held until the
5009 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5010 * about a memory-reclaim deadlock.
5011 */
5012 str = kmalloc(len, GFP_KERNEL);
5013 if (!str)
5014 return -ENOMEM;
ceb3a16c 5015
e984a55a 5016 rcu_read_lock();
a3192688
JL		 5017 result = scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
5018 clp->cl_ipaddr,
5019 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5020 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5021 rcu_read_unlock();
a3192688
JL		 5022
5023 /* Did something change? */
5024 if (result >= len) {
5025 kfree(str);
5026 if (retried)
5027 return -EINVAL;
5028 retried = true;
5029 goto retry;
5030 }
5031 clp->cl_owner_id = str;
5032 return 0;
e984a55a
CL		 5033}
5034
873e3851
JL		 5035static int
5036nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5037{
5038 int result;
5039 size_t len;
5040 char *str;
5041
5042 len = 10 + 10 + 1 + 10 + 1 +
5043 strlen(nfs4_client_id_uniquifier) + 1 +
5044 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5045
5046 if (len > NFS4_OPAQUE_LIMIT + 1)
5047 return -EINVAL;
5048
5049 /*
5050 * Since this string is allocated at mount time, and held until the
5051 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5052 * about a memory-reclaim deadlock.
5053 */
5054 str = kmalloc(len, GFP_KERNEL);
5055 if (!str)
5056 return -ENOMEM;
5057
5058 result = scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
5059 clp->rpc_ops->version, clp->cl_minorversion,
5060 nfs4_client_id_uniquifier,
5061 clp->cl_rpcclient->cl_nodename);
5062 if (result >= len) {
5063 kfree(str);
5064 return -EINVAL;
5065 }
5066 clp->cl_owner_id = str;
5067 return 0;
5068}
5069
5070static int
5071nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5072{
873e3851
JL		 5073 int result;
5074 size_t len;
5075 char *str;
ceb3a16c
TM		 5076
5077 if (clp->cl_owner_id != NULL)
873e3851 5078 return 0;
6f2ea7f2
CL		 5079
5080 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5081 return nfs4_init_uniquifier_client_string(clp);
5082
5083 len = 10 + 10 + 1 + 10 + 1 +
5084 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5085
5086 if (len > NFS4_OPAQUE_LIMIT + 1)
5087 return -EINVAL;
5088
5089 /*
5090 * Since this string is allocated at mount time, and held until the
5091 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5092 * about a memory-reclaim deadlock.
5093 */
5094 str = kmalloc(len, GFP_KERNEL);
5095 if (!str)
5096 return -ENOMEM;
5097
5098 result = scnprintf(str, len, "Linux NFSv%u.%u %s",
5099 clp->rpc_ops->version, clp->cl_minorversion,
5100 clp->cl_rpcclient->cl_nodename);
5101 if (result >= len) {
5102 kfree(str);
5103 return -EINVAL;
5104 }
5105 clp->cl_owner_id = str;
5106 return 0;
e984a55a
CL		 5107}
5108
706cb8db
CL		 5109/*
5110 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5111 * services. Advertise one based on the address family of the
5112 * clientaddr.
5113 */
5114static unsigned int
5115nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5116{
5117 if (strchr(clp->cl_ipaddr, ':') != NULL)
5118 return scnprintf(buf, len, "tcp6");
5119 else
5120 return scnprintf(buf, len, "tcp");
5121}
5122
f11b2a1c
JL		 5123static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5124{
5125 struct nfs4_setclientid *sc = calldata;
5126
5127 if (task->tk_status == 0)
5128 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5129}
5130
5131static const struct rpc_call_ops nfs4_setclientid_ops = {
5132 .rpc_call_done = nfs4_setclientid_done,
5133};
5134
6bbb4ae8
CL		 5135/**
5136 * nfs4_proc_setclientid - Negotiate client ID
5137 * @clp: state data structure
5138 * @program: RPC program for NFSv4 callback service
5139 * @port: IP port number for NFS4 callback service
5140 * @cred: RPC credential to use for this call
5141 * @res: where to place the result
5142 *
5143 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5144 */
bb8b27e5
TM		 5145int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5146 unsigned short port, struct rpc_cred *cred,
5147 struct nfs4_setclientid_res *res)
1da177e4
LT		 5148{
5149 nfs4_verifier sc_verifier;
5150 struct nfs4_setclientid setclientid = {
5151 .sc_verifier = &sc_verifier,
5152 .sc_prog = program,
3a6bb738 5153 .sc_clnt = clp,
1da177e4
LT		 5154 };
5155 struct rpc_message msg = {
5156 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5157 .rpc_argp = &setclientid,
bb8b27e5 5158 .rpc_resp = res,
286d7d6a 5159 .rpc_cred = cred,
1da177e4 5160 };
f11b2a1c
JL		 5161 struct rpc_task *task;
5162 struct rpc_task_setup task_setup_data = {
5163 .rpc_client = clp->cl_rpcclient,
5164 .rpc_message = &msg,
5165 .callback_ops = &nfs4_setclientid_ops,
5166 .callback_data = &setclientid,
5167 .flags = RPC_TASK_TIMEOUT,
5168 };
6bbb4ae8 5169 int status;
1da177e4 5170
de734831 5171 /* nfs_client_id4 */
f092075d 5172 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5173
5174 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5175 status = nfs4_init_uniform_client_string(clp);
5176 else
a3192688 5177 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5178
5179 if (status)
5180 goto out;
3a6bb738 5181
de734831 5182 /* cb_client4 */
706cb8db
CL		 5183 setclientid.sc_netid_len =
5184 nfs4_init_callback_netid(clp,
5185 setclientid.sc_netid,
5186 sizeof(setclientid.sc_netid));
de734831 5187 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5188 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5189 clp->cl_ipaddr, port >> 8, port & 255);
5190
3a6bb738 5191 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5192 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5193 clp->cl_owner_id);
f11b2a1c
JL		 5194 task = rpc_run_task(&task_setup_data);
5195 if (IS_ERR(task)) {
5196 status = PTR_ERR(task);
5197 goto out;
5198 }
5199 status = task->tk_status;
5200 if (setclientid.sc_cred) {
5201 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5202 put_rpccred(setclientid.sc_cred);
5203 }
5204 rpc_put_task(task);
5205out:
c6d01c6f 5206 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5207 dprintk("NFS reply setclientid: %d\n", status);
5208 return status;
1da177e4
LT		 5209}
5210
6bbb4ae8
CL		 5211/**
5212 * nfs4_proc_setclientid_confirm - Confirm client ID
5213 * @clp: state data structure
5214 * @res: result of a previous SETCLIENTID
5215 * @cred: RPC credential to use for this call
5216 *
5217 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5218 */
fd954ae1 5219int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5220 struct nfs4_setclientid_res *arg,
5221 struct rpc_cred *cred)
1da177e4 5222{
1da177e4
LT		 5223 struct rpc_message msg = {
5224 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5225 .rpc_argp = arg,
286d7d6a 5226 .rpc_cred = cred,
1da177e4 5227 };
1da177e4
LT		 5228 int status;
5229
6bbb4ae8
CL		 5230 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5231 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5232 clp->cl_clientid);
1bd714f2 5233 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5234 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5235 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5236 return status;
5237}
5238
fe650407
TM		 5239struct nfs4_delegreturndata {
5240 struct nfs4_delegreturnargs args;
fa178f29 5241 struct nfs4_delegreturnres res;
fe650407
TM		 5242 struct nfs_fh fh;
5243 nfs4_stateid stateid;
26e976a8 5244 unsigned long timestamp;
fa178f29 5245 struct nfs_fattr fattr;
fe650407 5246 int rpc_status;
039b756a
PT		 5247 struct inode *inode;
5248 bool roc;
5249 u32 roc_barrier;
fe650407
TM		 5250};
5251
fe650407
TM		 5252static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5253{
5254 struct nfs4_delegreturndata *data = calldata;
938e1010 5255
14516c3a
TM		 5256 if (!nfs4_sequence_done(task, &data->res.seq_res))
5257 return;
938e1010 5258
ca8acf8d 5259 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5260 switch (task->tk_status) {
79708861 5261 case 0:
fa178f29 5262 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5263 case -NFS4ERR_ADMIN_REVOKED:
5264 case -NFS4ERR_DELEG_REVOKED:
5265 case -NFS4ERR_BAD_STATEID:
5266 case -NFS4ERR_OLD_STATEID:
5267 case -NFS4ERR_STALE_STATEID:
5268 case -NFS4ERR_EXPIRED:
5269 task->tk_status = 0;
039b756a
PT		 5270 if (data->roc)
5271 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5272 break;
79708861 5273 default:
8478eaa1
N		 5274 if (nfs4_async_handle_error(task, data->res.server,
5275 NULL, NULL) == -EAGAIN) {
d00c5d43 5276 rpc_restart_call_prepare(task);
79708861
RL		 5277 return;
5278 }
5279 }
5280 data->rpc_status = task->tk_status;
fe650407
TM		 5281}
5282
5283static void nfs4_delegreturn_release(void *calldata)
5284{
039b756a 5285 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5286 struct inode *inode = data->inode;
039b756a 5287
ea7c38fe
TM		 5288 if (inode) {
5289 if (data->roc)
5290 pnfs_roc_release(inode);
5291 nfs_iput_and_deactive(inode);
5292 }
fe650407
TM		 5293 kfree(calldata);
5294}
5295
938e1010
AA		 5296static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5297{
5298 struct nfs4_delegreturndata *d_data;
5299
5300 d_data = (struct nfs4_delegreturndata *)data;
5301
4ff376fe
TM		 5302 if (d_data->roc)
5303 pnfs_roc_get_barrier(d_data->inode, &d_data->roc_barrier);
039b756a 5304
d9afbd1b
TM		 5305 nfs4_setup_sequence(d_data->res.server,
5306 &d_data->args.seq_args,
5307 &d_data->res.seq_res,
5308 task);
938e1010 5309}
938e1010 5310
c8d149f3 5311static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5312 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5313 .rpc_call_done = nfs4_delegreturn_done,
5314 .rpc_release = nfs4_delegreturn_release,
5315};
5316
e6f81075 5317static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5318{
5319 struct nfs4_delegreturndata *data;
fa178f29 5320 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5321 struct rpc_task *task;
5138fde0
TM		 5322 struct rpc_message msg = {
5323 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5324 .rpc_cred = cred,
5325 };
c970aa85
TM		 5326 struct rpc_task_setup task_setup_data = {
5327 .rpc_client = server->client,
5138fde0 5328 .rpc_message = &msg,
c970aa85
TM		 5329 .callback_ops = &nfs4_delegreturn_ops,
5330 .flags = RPC_TASK_ASYNC,
5331 };
e6f81075 5332 int status = 0;
fe650407 5333
8535b2be 5334 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5335 if (data == NULL)
5336 return -ENOMEM;
a9c92d6b 5337 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5338 data->args.fhandle = &data->fh;
5339 data->args.stateid = &data->stateid;
9e907fec 5340 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5341 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5342 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5343 data->res.fattr = &data->fattr;
5344 data->res.server = server;
5138fde0 5345 nfs_fattr_init(data->res.fattr);
26e976a8 5346 data->timestamp = jiffies;
fe650407 5347 data->rpc_status = 0;
ea7c38fe
TM		 5348 data->inode = nfs_igrab_and_active(inode);
5349 if (data->inode)
5350 data->roc = nfs4_roc(inode);
fe650407 5351
c970aa85 5352 task_setup_data.callback_data = data;
1174dd1f
TM		 5353 msg.rpc_argp = &data->args;
5354 msg.rpc_resp = &data->res;
c970aa85 5355 task = rpc_run_task(&task_setup_data);
7a1218a2 5356 if (IS_ERR(task))
fe650407 5357 return PTR_ERR(task);
e6f81075
TM		 5358 if (!issync)
5359 goto out;
fe650407 5360 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5361 if (status != 0)
5362 goto out;
5363 status = data->rpc_status;
e144cbcc
TM		 5364 if (status == 0)
5365 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5366 else
5367 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5368out:
e6b3c4db 5369 rpc_put_task(task);
fe650407 5370 return status;
1da177e4
LT		 5371}
5372
e6f81075 5373int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5374{
5375 struct nfs_server *server = NFS_SERVER(inode);
5376 struct nfs4_exception exception = { };
5377 int err;
5378 do {
e6f81075 5379 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5380 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5381 switch (err) {
5382 case -NFS4ERR_STALE_STATEID:
5383 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5384 case 0:
5385 return 0;
5386 }
5387 err = nfs4_handle_exception(server, err, &exception);
5388 } while (exception.retry);
5389 return err;
5390}
5391
5392#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5393#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5394
5395/*
5396 * sleep, with exponential backoff, and retry the LOCK operation.
5397 */
5398static unsigned long
5399nfs4_set_lock_task_retry(unsigned long timeout)
5400{
416ad3c9 5401 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5402 timeout <<= 1;
5403 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5404 return NFS4_LOCK_MAXTIMEOUT;
5405 return timeout;
5406}
5407
1da177e4
LT		 5408static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5409{
5410 struct inode *inode = state->inode;
5411 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5412 struct nfs_client *clp = server->nfs_client;
911d1aaf 5413 struct nfs_lockt_args arg = {
1da177e4 5414 .fh = NFS_FH(inode),
911d1aaf 5415 .fl = request,
1da177e4 5416 };
911d1aaf
TM		 5417 struct nfs_lockt_res res = {
5418 .denied = request,
1da177e4
LT		 5419 };
5420 struct rpc_message msg = {
5421 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5422 .rpc_argp = &arg,
5423 .rpc_resp = &res,
5424 .rpc_cred = state->owner->so_cred,
5425 };
1da177e4
LT		 5426 struct nfs4_lock_state *lsp;
5427 int status;
5428
911d1aaf 5429 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5430 status = nfs4_set_lock_state(state, request);
5431 if (status != 0)
5432 goto out;
5433 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5434 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5435 arg.lock_owner.s_dev = server->s_dev;
7c513058 5436 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5437 switch (status) {
5438 case 0:
5439 request->fl_type = F_UNLCK;
5440 break;
5441 case -NFS4ERR_DENIED:
5442 status = 0;
1da177e4 5443 }
70cc6487 5444 request->fl_ops->fl_release_private(request);
a6f951dd 5445 request->fl_ops = NULL;
8d0a8a9d 5446out:
1da177e4
LT		 5447 return status;
5448}
5449
5450static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5451{
5452 struct nfs4_exception exception = { };
5453 int err;
5454
5455 do {
d1b748a5
TM		 5456 err = _nfs4_proc_getlk(state, cmd, request);
5457 trace_nfs4_get_lock(request, state, cmd, err);
5458 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5459 &exception);
5460 } while (exception.retry);
5461 return err;
5462}
5463
83bfff23 5464static int do_vfs_lock(struct inode *inode, struct file_lock *fl)
1da177e4
LT		 5465{
5466 int res = 0;
5467 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5468 case FL_POSIX:
83bfff23 5469 res = posix_lock_inode_wait(inode, fl);
1da177e4
LT		 5470 break;
5471 case FL_FLOCK:
83bfff23 5472 res = flock_lock_inode_wait(inode, fl);
1da177e4
LT		 5473 break;
5474 default:
5475 BUG();
5476 }
1da177e4
LT		 5477 return res;
5478}
5479
faf5f49c 5480struct nfs4_unlockdata {
911d1aaf
TM		 5481 struct nfs_locku_args arg;
5482 struct nfs_locku_res res;
faf5f49c
TM		 5483 struct nfs4_lock_state *lsp;
5484 struct nfs_open_context *ctx;
911d1aaf
TM		 5485 struct file_lock fl;
5486 const struct nfs_server *server;
26e976a8 5487 unsigned long timestamp;
faf5f49c
TM		 5488};
5489
911d1aaf
TM		 5490static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5491 struct nfs_open_context *ctx,
5492 struct nfs4_lock_state *lsp,
5493 struct nfs_seqid *seqid)
5494{
5495 struct nfs4_unlockdata *p;
5496 struct inode *inode = lsp->ls_state->inode;
5497
8535b2be 5498 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5499 if (p == NULL)
5500 return NULL;
5501 p->arg.fh = NFS_FH(inode);
5502 p->arg.fl = &p->fl;
5503 p->arg.seqid = seqid;
c1d51931 5504 p->res.seqid = seqid;
911d1aaf
TM		 5505 p->lsp = lsp;
5506 atomic_inc(&lsp->ls_count);
5507 /* Ensure we don't close file until we're done freeing locks! */
5508 p->ctx = get_nfs_open_context(ctx);
5509 memcpy(&p->fl, fl, sizeof(p->fl));
5510 p->server = NFS_SERVER(inode);
5511 return p;
5512}
5513
06f814a3 5514static void nfs4_locku_release_calldata(void *data)
faf5f49c 5515{
963d8fe5 5516 struct nfs4_unlockdata *calldata = data;
911d1aaf 5517 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5518 nfs4_put_lock_state(calldata->lsp);
5519 put_nfs_open_context(calldata->ctx);
5520 kfree(calldata);
faf5f49c
TM		 5521}
5522
963d8fe5 5523static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5524{
963d8fe5 5525 struct nfs4_unlockdata *calldata = data;
faf5f49c 5526
14516c3a
TM		 5527 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5528 return;
faf5f49c
TM		 5529 switch (task->tk_status) {
5530 case 0:
26e976a8 5531 renew_lease(calldata->server, calldata->timestamp);
83bfff23 5532 do_vfs_lock(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 5533 if (nfs4_update_lock_stateid(calldata->lsp,
5534 &calldata->res.stateid))
5535 break;
9e33bed5
TM		 5536 case -NFS4ERR_BAD_STATEID:
5537 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5538 case -NFS4ERR_STALE_STATEID:
5539 case -NFS4ERR_EXPIRED:
425c1d4e
TM		 5540 if (!nfs4_stateid_match(&calldata->arg.stateid,
5541 &calldata->lsp->ls_stateid))
5542 rpc_restart_call_prepare(task);
faf5f49c
TM		 5543 break;
5544 default:
8478eaa1
N		 5545 if (nfs4_async_handle_error(task, calldata->server,
5546 NULL, NULL) == -EAGAIN)
d00c5d43 5547 rpc_restart_call_prepare(task);
faf5f49c 5548 }
2b1bc308 5549 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5550}
5551
4ce70ada 5552static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5553{
4ce70ada 5554 struct nfs4_unlockdata *calldata = data;
faf5f49c 5555
911d1aaf 5556 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5557 goto out_wait;
425c1d4e 5558 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5559 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5560 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5561 goto out_no_action;
faf5f49c 5562 }
26e976a8 5563 calldata->timestamp = jiffies;
035168ab 5564 if (nfs4_setup_sequence(calldata->server,
a893693c 5565 &calldata->arg.seq_args,
2240a9e2
TM		 5566 &calldata->res.seq_res,
5567 task) != 0)
5568 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5569 return;
5570out_no_action:
5571 task->tk_action = NULL;
5572out_wait:
5573 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5574}
5575
963d8fe5 5576static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5577 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5578 .rpc_call_done = nfs4_locku_done,
06f814a3 5579 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5580};
5581
a5d16a4d
TM		 5582static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5583 struct nfs_open_context *ctx,
5584 struct nfs4_lock_state *lsp,
5585 struct nfs_seqid *seqid)
5586{
5587 struct nfs4_unlockdata *data;
5138fde0
TM		 5588 struct rpc_message msg = {
5589 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5590 .rpc_cred = ctx->cred,
5591 };
c970aa85
TM		 5592 struct rpc_task_setup task_setup_data = {
5593 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5594 .rpc_message = &msg,
c970aa85 5595 .callback_ops = &nfs4_locku_ops,
101070ca 5596 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5597 .flags = RPC_TASK_ASYNC,
5598 };
a5d16a4d 5599
fa940720
WAA		 5600 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5601 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5602
137d6aca
FF		 5603 /* Ensure this is an unlock - when canceling a lock, the
5604 * canceled lock is passed in, and it won't be an unlock.
5605 */
5606 fl->fl_type = F_UNLCK;
5607
a5d16a4d
TM		 5608 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5609 if (data == NULL) {
5610 nfs_free_seqid(seqid);
5611 return ERR_PTR(-ENOMEM);
5612 }
5613
a9c92d6b 5614 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5615 msg.rpc_argp = &data->arg;
5616 msg.rpc_resp = &data->res;
c970aa85
TM		 5617 task_setup_data.callback_data = data;
5618 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5619}
5620
faf5f49c
TM		 5621static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5622{
65b62a29
TM		 5623 struct inode *inode = state->inode;
5624 struct nfs4_state_owner *sp = state->owner;
5625 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5626 struct nfs_seqid *seqid;
1da177e4 5627 struct nfs4_lock_state *lsp;
06f814a3 5628 struct rpc_task *task;
b4019c0e 5629 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 5630 int status = 0;
536ff0f8 5631 unsigned char fl_flags = request->fl_flags;
faf5f49c 5632
8d0a8a9d 5633 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5634 /* Unlock _before_ we do the RPC call */
5635 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5636 /* Exclude nfs_delegation_claim_locks() */
5637 mutex_lock(&sp->so_delegreturn_mutex);
5638 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 5639 down_read(&nfsi->rwsem);
83bfff23 5640 if (do_vfs_lock(inode, request) == -ENOENT) {
19e03c57 5641 up_read(&nfsi->rwsem);
65b62a29 5642 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5643 goto out;
19e03c57
TM		 5644 }
5645 up_read(&nfsi->rwsem);
65b62a29 5646 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5647 if (status != 0)
9b073574
TM		 5648 goto out;
5649 /* Is this a delegated lock? */
8d0a8a9d 5650 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5651 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5652 goto out;
b4019c0e
TM		 5653 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5654 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5655 status = -ENOMEM;
badc76dd 5656 if (IS_ERR(seqid))
9b073574 5657 goto out;
cd3758e3 5658 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5659 status = PTR_ERR(task);
5660 if (IS_ERR(task))
9b073574 5661 goto out;
a5d16a4d 5662 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5663 rpc_put_task(task);
9b073574 5664out:
536ff0f8 5665 request->fl_flags = fl_flags;
d1b748a5 5666 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5667 return status;
5668}
5669
a5d16a4d
TM		 5670struct nfs4_lockdata {
5671 struct nfs_lock_args arg;
5672 struct nfs_lock_res res;
5673 struct nfs4_lock_state *lsp;
5674 struct nfs_open_context *ctx;
5675 struct file_lock fl;
26e976a8 5676 unsigned long timestamp;
a5d16a4d
TM		 5677 int rpc_status;
5678 int cancelled;
66179efe 5679 struct nfs_server *server;
a5d16a4d
TM		 5680};
5681
5682static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5683 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5684 gfp_t gfp_mask)
1da177e4 5685{
a5d16a4d
TM		 5686 struct nfs4_lockdata *p;
5687 struct inode *inode = lsp->ls_state->inode;
1da177e4 5688 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 5689 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 5690
8535b2be 5691 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5692 if (p == NULL)
5693 return NULL;
5694
5695 p->arg.fh = NFS_FH(inode);
5696 p->arg.fl = &p->fl;
8535b2be 5697 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 5698 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 5699 goto out_free;
b4019c0e
TM		 5700 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5701 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 5702 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 5703 goto out_free_seqid;
7539bbab 5704 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5705 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5706 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5707 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5708 p->lsp = lsp;
66179efe 5709 p->server = server;
a5d16a4d
TM		 5710 atomic_inc(&lsp->ls_count);
5711 p->ctx = get_nfs_open_context(ctx);
feaff8e5 5712 get_file(fl->fl_file);
a5d16a4d
TM		 5713 memcpy(&p->fl, fl, sizeof(p->fl));
5714 return p;
2f74c0a0
TM		 5715out_free_seqid:
5716 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5717out_free:
5718 kfree(p);
5719 return NULL;
5720}
5721
5722static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5723{
5724 struct nfs4_lockdata *data = calldata;
5725 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5726
3110ff80 5727 dprintk("%s: begin!\n", __func__);
2f74c0a0 5728 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5729 goto out_wait;
a5d16a4d 5730 /* Do we need to do an open_to_lock_owner? */
6b447539 5731 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 5732 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5733 goto out_release_lock_seqid;
8fe72bac 5734 }
425c1d4e
TM		 5735 nfs4_stateid_copy(&data->arg.open_stateid,
5736 &state->open_stateid);
a5d16a4d 5737 data->arg.new_lock_owner = 1;
c1d51931 5738 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 5739 } else {
2f74c0a0 5740 data->arg.new_lock_owner = 0;
425c1d4e
TM		 5741 nfs4_stateid_copy(&data->arg.lock_stateid,
5742 &data->lsp->ls_stateid);
5743 }
5d422301
TM		 5744 if (!nfs4_valid_open_stateid(state)) {
5745 data->rpc_status = -EBADF;
5746 task->tk_action = NULL;
5747 goto out_release_open_seqid;
5748 }
26e976a8 5749 data->timestamp = jiffies;
035168ab
TM		 5750 if (nfs4_setup_sequence(data->server,
5751 &data->arg.seq_args,
2240a9e2 5752 &data->res.seq_res,
d9afbd1b 5753 task) == 0)
66179efe 5754 return;
5d422301 5755out_release_open_seqid:
2240a9e2
TM		 5756 nfs_release_seqid(data->arg.open_seqid);
5757out_release_lock_seqid:
5758 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5759out_wait:
5760 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5761 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5762}
5763
a5d16a4d
TM		 5764static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5765{
5766 struct nfs4_lockdata *data = calldata;
39071e6f 5767 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 5768
3110ff80 5769 dprintk("%s: begin!\n", __func__);
a5d16a4d 5770
14516c3a
TM		 5771 if (!nfs4_sequence_done(task, &data->res.seq_res))
5772 return;
66179efe 5773
a5d16a4d 5774 data->rpc_status = task->tk_status;
425c1d4e
TM		 5775 switch (task->tk_status) {
5776 case 0:
2b0143b5 5777 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 5778 data->timestamp);
c69899a1
TM		 5779 if (data->arg.new_lock) {
5780 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
83bfff23 5781 if (do_vfs_lock(lsp->ls_state->inode, &data->fl) < 0) {
c69899a1
TM		 5782 rpc_restart_call_prepare(task);
5783 break;
5784 }
5785 }
39071e6f
TM		 5786 if (data->arg.new_lock_owner != 0) {
5787 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5788 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5789 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5790 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5791 rpc_restart_call_prepare(task);
425c1d4e
TM		 5792 break;
5793 case -NFS4ERR_BAD_STATEID:
5794 case -NFS4ERR_OLD_STATEID:
5795 case -NFS4ERR_STALE_STATEID:
5796 case -NFS4ERR_EXPIRED:
5797 if (data->arg.new_lock_owner != 0) {
5798 if (!nfs4_stateid_match(&data->arg.open_stateid,
5799 &lsp->ls_state->open_stateid))
5800 rpc_restart_call_prepare(task);
5801 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5802 &lsp->ls_stateid))
5803 rpc_restart_call_prepare(task);
a5d16a4d 5804 }
3110ff80 5805 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5806}
5807
5808static void nfs4_lock_release(void *calldata)
5809{
5810 struct nfs4_lockdata *data = calldata;
5811
3110ff80 5812 dprintk("%s: begin!\n", __func__);
2f74c0a0 5813 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5814 if (data->cancelled != 0) {
5815 struct rpc_task *task;
5816 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5817 data->arg.lock_seqid);
5818 if (!IS_ERR(task))
bf294b41 5819 rpc_put_task_async(task);
3110ff80 5820 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5821 } else
5822 nfs_free_seqid(data->arg.lock_seqid);
5823 nfs4_put_lock_state(data->lsp);
5824 put_nfs_open_context(data->ctx);
feaff8e5 5825 fput(data->fl.fl_file);
a5d16a4d 5826 kfree(data);
3110ff80 5827 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5828}
5829
5830static const struct rpc_call_ops nfs4_lock_ops = {
5831 .rpc_call_prepare = nfs4_lock_prepare,
5832 .rpc_call_done = nfs4_lock_done,
5833 .rpc_release = nfs4_lock_release,
5834};
5835
2bee72a6
TM		 5836static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5837{
2bee72a6
TM		 5838 switch (error) {
5839 case -NFS4ERR_ADMIN_REVOKED:
5840 case -NFS4ERR_BAD_STATEID:
ecac799a 5841 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5842 if (new_lock_owner != 0 ||
795a88c9 5843 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5844 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5845 break;
5846 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5847 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5848 case -NFS4ERR_EXPIRED:
5849 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5850 };
5851}
5852
afe6c27c 5853static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5854{
5855 struct nfs4_lockdata *data;
5856 struct rpc_task *task;
5138fde0
TM		 5857 struct rpc_message msg = {
5858 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5859 .rpc_cred = state->owner->so_cred,
5860 };
c970aa85
TM		 5861 struct rpc_task_setup task_setup_data = {
5862 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5863 .rpc_message = &msg,
c970aa85 5864 .callback_ops = &nfs4_lock_ops,
101070ca 5865 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5866 .flags = RPC_TASK_ASYNC,
5867 };
a5d16a4d
TM		 5868 int ret;
5869
3110ff80 5870 dprintk("%s: begin!\n", __func__);
cd3758e3 5871 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5872 fl->fl_u.nfs4_fl.owner,
5873 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5874 if (data == NULL)
5875 return -ENOMEM;
5876 if (IS_SETLKW(cmd))
5877 data->arg.block = 1;
a9c92d6b 5878 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5879 msg.rpc_argp = &data->arg;
5880 msg.rpc_resp = &data->res;
c970aa85 5881 task_setup_data.callback_data = data;
8fe72bac
TM		 5882 if (recovery_type > NFS_LOCK_NEW) {
5883 if (recovery_type == NFS_LOCK_RECLAIM)
5884 data->arg.reclaim = NFS_LOCK_RECLAIM;
5885 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 5886 } else
5887 data->arg.new_lock = 1;
c970aa85 5888 task = rpc_run_task(&task_setup_data);
7a1218a2 5889 if (IS_ERR(task))
a5d16a4d 5890 return PTR_ERR(task);
a5d16a4d
TM		 5891 ret = nfs4_wait_for_completion_rpc_task(task);
5892 if (ret == 0) {
5893 ret = data->rpc_status;
2bee72a6
TM		 5894 if (ret)
5895 nfs4_handle_setlk_error(data->server, data->lsp,
5896 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5897 } else
5898 data->cancelled = 1;
e6b3c4db 5899 rpc_put_task(task);
3110ff80 5900 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5901 return ret;
1da177e4
LT		 5902}
5903
5904static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5905{
202b50dc 5906 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5907 struct nfs4_exception exception = {
5908 .inode = state->inode,
5909 };
202b50dc
TM		 5910 int err;
5911
5912 do {
42a2d13e
TM		 5913 /* Cache the lock if possible... */
5914 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5915 return 0;
afe6c27c 5916 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5917 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5918 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5919 break;
5920 nfs4_handle_exception(server, err, &exception);
5921 } while (exception.retry);
5922 return err;
1da177e4
LT		 5923}
5924
5925static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5926{
202b50dc 5927 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5928 struct nfs4_exception exception = {
5929 .inode = state->inode,
5930 };
202b50dc
TM		 5931 int err;
5932
6bfc93ef
TM		 5933 err = nfs4_set_lock_state(state, request);
5934 if (err != 0)
5935 return err;
f6de7a39 5936 if (!recover_lost_locks) {
ef1820f9
N		 5937 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5938 return 0;
5939 }
202b50dc 5940 do {
42a2d13e
TM		 5941 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5942 return 0;
afe6c27c 5943 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5944 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5945 switch (err) {
5946 default:
5947 goto out;
5948 case -NFS4ERR_GRACE:
5949 case -NFS4ERR_DELAY:
5950 nfs4_handle_exception(server, err, &exception);
5951 err = 0;
5952 }
202b50dc 5953 } while (exception.retry);
a9ed2e25 5954out:
202b50dc 5955 return err;
1da177e4
LT		 5956}
5957
f062eb6c 5958#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5959/**
5960 * nfs41_check_expired_locks - possibly free a lock stateid
5961 *
5962 * @state: NFSv4 state for an inode
5963 *
5964 * Returns NFS_OK if recovery for this stateid is now finished.
5965 * Otherwise a negative NFS4ERR value is returned.
5966 */
b01dd1d8 5967static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5968{
eb64cf96 5969 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5970 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5971 struct nfs_server *server = NFS_SERVER(state->inode);
5972
b01dd1d8 5973 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5974 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5975 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5976
5977 status = nfs41_test_stateid(server,
5978 &lsp->ls_stateid,
5979 cred);
08cb47fa 5980 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5981 if (status != NFS_OK) {
3e60ffdd
CL		 5982 /* Free the stateid unless the server
5983 * informs us the stateid is unrecognized. */
89af2739
CL		 5984 if (status != -NFS4ERR_BAD_STATEID)
5985 nfs41_free_stateid(server,
ab7cb0df
TM		 5986 &lsp->ls_stateid,
5987 cred);
795a88c9 5988 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5989 ret = status;
5990 }
5991 }
5992 };
5993
5994 return ret;
5995}
5996
5997static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5998{
5999 int status = NFS_OK;
6000
6001 if (test_bit(LK_STATE_IN_USE, &state->flags))
6002 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 6003 if (status != NFS_OK)
6004 status = nfs4_lock_expired(state, request);
6005 return status;
f062eb6c
BS		 6006}
6007#endif
6008
1da177e4
LT		 6009static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6010{
19e03c57 6011 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 6012 unsigned char fl_flags = request->fl_flags;
8e469ebd 6013 int status = -ENOLCK;
1da177e4 6014
8e469ebd
TM		 6015 if ((fl_flags & FL_POSIX) &&
6016 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6017 goto out;
6bfc93ef 6018 /* Is this a delegated open? */
6bfc93ef
TM		 6019 status = nfs4_set_lock_state(state, request);
6020 if (status != 0)
6021 goto out;
01c3b861 6022 request->fl_flags |= FL_ACCESS;
83bfff23 6023 status = do_vfs_lock(state->inode, request);
01c3b861
TM		 6024 if (status < 0)
6025 goto out;
19e03c57 6026 down_read(&nfsi->rwsem);
01c3b861 6027 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6028 /* Yes: cache locks! */
01c3b861 6029 /* ...but avoid races with delegation recall... */
19e03c57 6030 request->fl_flags = fl_flags & ~FL_SLEEP;
83bfff23 6031 status = do_vfs_lock(state->inode, request);
c69899a1 6032 up_read(&nfsi->rwsem);
9a99af49 6033 goto out;
9a99af49 6034 }
19e03c57 6035 up_read(&nfsi->rwsem);
c69899a1 6036 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6037out:
6038 request->fl_flags = fl_flags;
1da177e4
LT		 6039 return status;
6040}
6041
6042static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6043{
a1d0b5ee
TM		 6044 struct nfs4_exception exception = {
6045 .state = state,
05ffe24f 6046 .inode = state->inode,
a1d0b5ee 6047 };
1da177e4
LT		 6048 int err;
6049
6050 do {
965b5d67 6051 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 6052 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 6053 if (err == -NFS4ERR_DENIED)
6054 err = -EAGAIN;
1da177e4 6055 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6056 err, &exception);
1da177e4
LT		 6057 } while (exception.retry);
6058 return err;
6059}
6060
6061static int
6062nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6063{
6064 struct nfs_open_context *ctx;
6065 struct nfs4_state *state;
6066 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6067 int status;
6068
6069 /* verify open state */
cd3758e3 6070 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6071 state = ctx->state;
6072
6073 if (request->fl_start < 0 || request->fl_end < 0)
6074 return -EINVAL;
6075
d953126a
TM		 6076 if (IS_GETLK(cmd)) {
6077 if (state != NULL)
6078 return nfs4_proc_getlk(state, F_GETLK, request);
6079 return 0;
6080 }
1da177e4
LT		 6081
6082 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6083 return -EINVAL;
6084
d953126a
TM		 6085 if (request->fl_type == F_UNLCK) {
6086 if (state != NULL)
6087 return nfs4_proc_unlck(state, cmd, request);
6088 return 0;
6089 }
1da177e4 6090
d953126a
TM		 6091 if (state == NULL)
6092 return -ENOLCK;
55725513
TM		 6093 /*
6094 * Don't rely on the VFS having checked the file open mode,
6095 * since it won't do this for flock() locks.
6096 */
f44106e2 6097 switch (request->fl_type) {
55725513
TM		 6098 case F_RDLCK:
6099 if (!(filp->f_mode & FMODE_READ))
6100 return -EBADF;
6101 break;
6102 case F_WRLCK:
6103 if (!(filp->f_mode & FMODE_WRITE))
6104 return -EBADF;
6105 }
6106
1da177e4
LT		 6107 do {
6108 status = nfs4_proc_setlk(state, cmd, request);
6109 if ((status != -EAGAIN) || IS_SETLK(cmd))
6110 break;
6111 timeout = nfs4_set_lock_task_retry(timeout);
6112 status = -ERESTARTSYS;
6113 if (signalled())
6114 break;
6115 } while(status < 0);
1da177e4
LT		 6116 return status;
6117}
6118
db4f2e63 6119int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6120{
6121 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6122 int err;
6123
6124 err = nfs4_set_lock_state(state, fl);
6125 if (err != 0)
db4f2e63 6126 return err;
4a706fa0 6127 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6128 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6129}
6b3b5496 6130
cf470c3e
TM		 6131struct nfs_release_lockowner_data {
6132 struct nfs4_lock_state *lsp;
5ae67c4f 6133 struct nfs_server *server;
cf470c3e 6134 struct nfs_release_lockowner_args args;
b7e63a10 6135 struct nfs_release_lockowner_res res;
60ea6812 6136 unsigned long timestamp;
cf470c3e
TM		 6137};
6138
fbd4bfd1
CL		 6139static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6140{
6141 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6142 struct nfs_server *server = data->server;
cb04ad2a
PT		 6143 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6144 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6145 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6146 data->timestamp = jiffies;
fbd4bfd1
CL		 6147}
6148
6149static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6150{
6151 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6152 struct nfs_server *server = data->server;
6153
b7e63a10 6154 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6155
6156 switch (task->tk_status) {
6157 case 0:
6158 renew_lease(server, data->timestamp);
6159 break;
6160 case -NFS4ERR_STALE_CLIENTID:
6161 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6162 nfs4_schedule_lease_recovery(server->nfs_client);
6163 break;
60ea6812
CL		 6164 case -NFS4ERR_LEASE_MOVED:
6165 case -NFS4ERR_DELAY:
8478eaa1
N		 6166 if (nfs4_async_handle_error(task, server,
6167 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6168 rpc_restart_call_prepare(task);
6169 }
fbd4bfd1
CL		 6170}
6171
d3c7b7cc
TM		 6172static void nfs4_release_lockowner_release(void *calldata)
6173{
cf470c3e 6174 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6175 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6176 kfree(calldata);
6177}
6178
17280175 6179static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6180 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6181 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6182 .rpc_release = nfs4_release_lockowner_release,
6183};
6184
f1cdae87
JL		 6185static void
6186nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6187{
cf470c3e 6188 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6189 struct rpc_message msg = {
6190 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6191 };
6192
6193 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6194 return;
fbd4bfd1 6195
cf470c3e
TM		 6196 data = kmalloc(sizeof(*data), GFP_NOFS);
6197 if (!data)
f1cdae87 6198 return;
cf470c3e 6199 data->lsp = lsp;
5ae67c4f 6200 data->server = server;
cf470c3e
TM		 6201 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6202 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6203 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6204
cf470c3e 6205 msg.rpc_argp = &data->args;
b7e63a10
TM		 6206 msg.rpc_resp = &data->res;
6207 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6208 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6209}
6210
aa1870af
BF		 6211#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6212
64c2ce8b
AK		 6213static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6214 const void *buf, size_t buflen,
6215 int flags, int type)
6b3b5496 6216{
64c2ce8b
AK		 6217 if (strcmp(key, "") != 0)
6218 return -EINVAL;
4b580ee3 6219
2b0143b5 6220 return nfs4_proc_set_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6221}
6222
64c2ce8b
AK		 6223static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6224 void *buf, size_t buflen, int type)
6b3b5496 6225{
64c2ce8b
AK		 6226 if (strcmp(key, "") != 0)
6227 return -EINVAL;
aa1870af 6228
2b0143b5 6229 return nfs4_proc_get_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6230}
6231
64c2ce8b
AK		 6232static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6233 size_t list_len, const char *name,
6234 size_t name_len, int type)
6b3b5496 6235{
64c2ce8b 6236 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 6237
2b0143b5 6238 if (!nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))))
096455a2 6239 return 0;
64c2ce8b
AK		 6240
6241 if (list && len <= list_len)
6242 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6243 return len;
6b3b5496
BF		 6244}
6245
c9bccef6
DQ		 6246#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6247static inline int nfs4_server_supports_labels(struct nfs_server *server)
6248{
6249 return server->caps & NFS_CAP_SECURITY_LABEL;
6250}
6251
6252static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6253 const void *buf, size_t buflen,
6254 int flags, int type)
6255{
6256 if (security_ismaclabel(key))
6257 return nfs4_set_security_label(dentry, buf, buflen);
6258
6259 return -EOPNOTSUPP;
6260}
6261
6262static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6263 void *buf, size_t buflen, int type)
6264{
6265 if (security_ismaclabel(key))
2b0143b5 6266 return nfs4_get_security_label(d_inode(dentry), buf, buflen);
c9bccef6
DQ		 6267 return -EOPNOTSUPP;
6268}
6269
6270static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6271 size_t list_len, const char *name,
6272 size_t name_len, int type)
6273{
6274 size_t len = 0;
6275
2b0143b5
DH		 6276 if (nfs_server_capable(d_inode(dentry), NFS_CAP_SECURITY_LABEL)) {
6277 len = security_inode_listsecurity(d_inode(dentry), NULL, 0);
c9bccef6 6278 if (list && len <= list_len)
2b0143b5 6279 security_inode_listsecurity(d_inode(dentry), list, len);
c9bccef6
DQ		 6280 }
6281 return len;
6282}
6283
6284static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6285 .prefix = XATTR_SECURITY_PREFIX,
6286 .list = nfs4_xattr_list_nfs4_label,
6287 .get = nfs4_xattr_get_nfs4_label,
6288 .set = nfs4_xattr_set_nfs4_label,
6289};
6290#endif
6291
6292
533eb461
AA		 6293/*
6294 * nfs_fhget will use either the mounted_on_fileid or the fileid
6295 */
69aaaae1
TM		 6296static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6297{
533eb461
AA		 6298 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6299 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6300 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6301 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6302 return;
6303
6304 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6305 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6306 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6307 fattr->nlink = 2;
6308}
6309
f05d147f
BS		 6310static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6311 const struct qstr *name,
6312 struct nfs4_fs_locations *fs_locations,
6313 struct page *page)
683b57b4
TM		 6314{
6315 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6316 u32 bitmask[3] = {
361e624f 6317 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6318 };
6319 struct nfs4_fs_locations_arg args = {
6320 .dir_fh = NFS_FH(dir),
c228fd3a 6321 .name = name,
683b57b4
TM		 6322 .page = page,
6323 .bitmask = bitmask,
6324 };
22958463
BH		 6325 struct nfs4_fs_locations_res res = {
6326 .fs_locations = fs_locations,
6327 };
683b57b4
TM		 6328 struct rpc_message msg = {
6329 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6330 .rpc_argp = &args,
22958463 6331 .rpc_resp = &res,
683b57b4
TM		 6332 };
6333 int status;
6334
3110ff80 6335 dprintk("%s: start\n", __func__);
533eb461
AA		 6336
6337 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6338 * is not supported */
6339 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6340 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6341 else
6342 bitmask[0] |= FATTR4_WORD0_FILEID;
6343
c228fd3a 6344 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6345 fs_locations->server = server;
830b8e33 6346 fs_locations->nlocations = 0;
f05d147f 6347 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6348 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6349 return status;
6350}
6351
f05d147f
BS		 6352int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6353 const struct qstr *name,
6354 struct nfs4_fs_locations *fs_locations,
6355 struct page *page)
db0a9593
BS		 6356{
6357 struct nfs4_exception exception = { };
6358 int err;
6359 do {
078ea3df
TM		 6360 err = _nfs4_proc_fs_locations(client, dir, name,
6361 fs_locations, page);
6362 trace_nfs4_get_fs_locations(dir, name, err);
6363 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6364 &exception);
6365 } while (exception.retry);
6366 return err;
6367}
6368
b03d735b
CL		 6369/*
6370 * This operation also signals the server that this client is
6371 * performing migration recovery. The server can stop returning
6372 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6373 * appended to this compound to identify the client ID which is
6374 * performing recovery.
6375 */
6376static int _nfs40_proc_get_locations(struct inode *inode,
6377 struct nfs4_fs_locations *locations,
6378 struct page *page, struct rpc_cred *cred)
6379{
6380 struct nfs_server *server = NFS_SERVER(inode);
6381 struct rpc_clnt *clnt = server->client;
6382 u32 bitmask[2] = {
6383 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6384 };
6385 struct nfs4_fs_locations_arg args = {
6386 .clientid = server->nfs_client->cl_clientid,
6387 .fh = NFS_FH(inode),
6388 .page = page,
6389 .bitmask = bitmask,
6390 .migration = 1, /* skip LOOKUP */
6391 .renew = 1, /* append RENEW */
6392 };
6393 struct nfs4_fs_locations_res res = {
6394 .fs_locations = locations,
6395 .migration = 1,
6396 .renew = 1,
6397 };
6398 struct rpc_message msg = {
6399 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6400 .rpc_argp = &args,
6401 .rpc_resp = &res,
6402 .rpc_cred = cred,
6403 };
6404 unsigned long now = jiffies;
6405 int status;
6406
6407 nfs_fattr_init(&locations->fattr);
6408 locations->server = server;
6409 locations->nlocations = 0;
6410
6411 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6412 nfs4_set_sequence_privileged(&args.seq_args);
6413 status = nfs4_call_sync_sequence(clnt, server, &msg,
6414 &args.seq_args, &res.seq_res);
6415 if (status)
6416 return status;
6417
6418 renew_lease(server, now);
6419 return 0;
6420}
6421
6422#ifdef CONFIG_NFS_V4_1
6423
6424/*
6425 * This operation also signals the server that this client is
6426 * performing migration recovery. The server can stop asserting
6427 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6428 * performing this operation is identified in the SEQUENCE
6429 * operation in this compound.
6430 *
6431 * When the client supports GETATTR(fs_locations_info), it can
6432 * be plumbed in here.
6433 */
6434static int _nfs41_proc_get_locations(struct inode *inode,
6435 struct nfs4_fs_locations *locations,
6436 struct page *page, struct rpc_cred *cred)
6437{
6438 struct nfs_server *server = NFS_SERVER(inode);
6439 struct rpc_clnt *clnt = server->client;
6440 u32 bitmask[2] = {
6441 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6442 };
6443 struct nfs4_fs_locations_arg args = {
6444 .fh = NFS_FH(inode),
6445 .page = page,
6446 .bitmask = bitmask,
6447 .migration = 1, /* skip LOOKUP */
6448 };
6449 struct nfs4_fs_locations_res res = {
6450 .fs_locations = locations,
6451 .migration = 1,
6452 };
6453 struct rpc_message msg = {
6454 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6455 .rpc_argp = &args,
6456 .rpc_resp = &res,
6457 .rpc_cred = cred,
6458 };
6459 int status;
6460
6461 nfs_fattr_init(&locations->fattr);
6462 locations->server = server;
6463 locations->nlocations = 0;
6464
6465 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6466 nfs4_set_sequence_privileged(&args.seq_args);
6467 status = nfs4_call_sync_sequence(clnt, server, &msg,
6468 &args.seq_args, &res.seq_res);
6469 if (status == NFS4_OK &&
6470 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6471 status = -NFS4ERR_LEASE_MOVED;
6472 return status;
6473}
6474
6475#endif /* CONFIG_NFS_V4_1 */
6476
6477/**
6478 * nfs4_proc_get_locations - discover locations for a migrated FSID
6479 * @inode: inode on FSID that is migrating
6480 * @locations: result of query
6481 * @page: buffer
6482 * @cred: credential to use for this operation
6483 *
6484 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6485 * operation failed, or a negative errno if a local error occurred.
6486 *
6487 * On success, "locations" is filled in, but if the server has
6488 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6489 * asserted.
6490 *
6491 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6492 * from this client that require migration recovery.
6493 */
6494int nfs4_proc_get_locations(struct inode *inode,
6495 struct nfs4_fs_locations *locations,
6496 struct page *page, struct rpc_cred *cred)
6497{
6498 struct nfs_server *server = NFS_SERVER(inode);
6499 struct nfs_client *clp = server->nfs_client;
6500 const struct nfs4_mig_recovery_ops *ops =
6501 clp->cl_mvops->mig_recovery_ops;
6502 struct nfs4_exception exception = { };
6503 int status;
6504
6505 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6506 (unsigned long long)server->fsid.major,
6507 (unsigned long long)server->fsid.minor,
6508 clp->cl_hostname);
6509 nfs_display_fhandle(NFS_FH(inode), __func__);
6510
6511 do {
6512 status = ops->get_locations(inode, locations, page, cred);
6513 if (status != -NFS4ERR_DELAY)
6514 break;
6515 nfs4_handle_exception(server, status, &exception);
6516 } while (exception.retry);
6517 return status;
6518}
6519
44c99933
CL		 6520/*
6521 * This operation also signals the server that this client is
6522 * performing "lease moved" recovery. The server can stop
6523 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6524 * is appended to this compound to identify the client ID which is
6525 * performing recovery.
6526 */
6527static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6528{
6529 struct nfs_server *server = NFS_SERVER(inode);
6530 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6531 struct rpc_clnt *clnt = server->client;
6532 struct nfs4_fsid_present_arg args = {
6533 .fh = NFS_FH(inode),
6534 .clientid = clp->cl_clientid,
6535 .renew = 1, /* append RENEW */
6536 };
6537 struct nfs4_fsid_present_res res = {
6538 .renew = 1,
6539 };
6540 struct rpc_message msg = {
6541 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6542 .rpc_argp = &args,
6543 .rpc_resp = &res,
6544 .rpc_cred = cred,
6545 };
6546 unsigned long now = jiffies;
6547 int status;
6548
6549 res.fh = nfs_alloc_fhandle();
6550 if (res.fh == NULL)
6551 return -ENOMEM;
6552
6553 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6554 nfs4_set_sequence_privileged(&args.seq_args);
6555 status = nfs4_call_sync_sequence(clnt, server, &msg,
6556 &args.seq_args, &res.seq_res);
6557 nfs_free_fhandle(res.fh);
6558 if (status)
6559 return status;
6560
6561 do_renew_lease(clp, now);
6562 return 0;
6563}
6564
6565#ifdef CONFIG_NFS_V4_1
6566
6567/*
6568 * This operation also signals the server that this client is
6569 * performing "lease moved" recovery. The server can stop asserting
6570 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6571 * this operation is identified in the SEQUENCE operation in this
6572 * compound.
6573 */
6574static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6575{
6576 struct nfs_server *server = NFS_SERVER(inode);
6577 struct rpc_clnt *clnt = server->client;
6578 struct nfs4_fsid_present_arg args = {
6579 .fh = NFS_FH(inode),
6580 };
6581 struct nfs4_fsid_present_res res = {
6582 };
6583 struct rpc_message msg = {
6584 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6585 .rpc_argp = &args,
6586 .rpc_resp = &res,
6587 .rpc_cred = cred,
6588 };
6589 int status;
6590
6591 res.fh = nfs_alloc_fhandle();
6592 if (res.fh == NULL)
6593 return -ENOMEM;
6594
6595 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6596 nfs4_set_sequence_privileged(&args.seq_args);
6597 status = nfs4_call_sync_sequence(clnt, server, &msg,
6598 &args.seq_args, &res.seq_res);
6599 nfs_free_fhandle(res.fh);
6600 if (status == NFS4_OK &&
6601 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6602 status = -NFS4ERR_LEASE_MOVED;
6603 return status;
6604}
6605
6606#endif /* CONFIG_NFS_V4_1 */
6607
6608/**
6609 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6610 * @inode: inode on FSID to check
6611 * @cred: credential to use for this operation
6612 *
6613 * Server indicates whether the FSID is present, moved, or not
6614 * recognized. This operation is necessary to clear a LEASE_MOVED
6615 * condition for this client ID.
6616 *
6617 * Returns NFS4_OK if the FSID is present on this server,
6618 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6619 * NFS4ERR code if some error occurred on the server, or a
6620 * negative errno if a local failure occurred.
6621 */
6622int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6623{
6624 struct nfs_server *server = NFS_SERVER(inode);
6625 struct nfs_client *clp = server->nfs_client;
6626 const struct nfs4_mig_recovery_ops *ops =
6627 clp->cl_mvops->mig_recovery_ops;
6628 struct nfs4_exception exception = { };
6629 int status;
6630
6631 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6632 (unsigned long long)server->fsid.major,
6633 (unsigned long long)server->fsid.minor,
6634 clp->cl_hostname);
6635 nfs_display_fhandle(NFS_FH(inode), __func__);
6636
6637 do {
6638 status = ops->fsid_present(inode, cred);
6639 if (status != -NFS4ERR_DELAY)
6640 break;
6641 nfs4_handle_exception(server, status, &exception);
6642 } while (exception.retry);
6643 return status;
6644}
6645
5ec16a85 6646/**
a5250def
WAA		 6647 * If 'use_integrity' is true and the state managment nfs_client
6648 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6649 * and the machine credential as per RFC3530bis and RFC5661 Security
6650 * Considerations sections. Otherwise, just use the user cred with the
6651 * filesystem's rpc_client.
5ec16a85 6652 */
a5250def 6653static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6654{
6655 int status;
6656 struct nfs4_secinfo_arg args = {
6657 .dir_fh = NFS_FH(dir),
6658 .name = name,
6659 };
6660 struct nfs4_secinfo_res res = {
6661 .flavors = flavors,
6662 };
6663 struct rpc_message msg = {
6664 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6665 .rpc_argp = &args,
6666 .rpc_resp = &res,
6667 };
a5250def 6668 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6669 struct rpc_cred *cred = NULL;
a5250def
WAA		 6670
6671 if (use_integrity) {
6672 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6673 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6674 msg.rpc_cred = cred;
a5250def 6675 }
5a5ea0d4
BS		 6676
6677 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6678
6679 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6680 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6681
a5250def
WAA		 6682 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6683 &res.seq_res, 0);
5a5ea0d4 6684 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6685
7cb852df
WAA		 6686 if (cred)
6687 put_rpccred(cred);
a5250def 6688
5a5ea0d4
BS		 6689 return status;
6690}
6691
72de53ec
BS		 6692int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6693 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6694{
6695 struct nfs4_exception exception = { };
6696 int err;
6697 do {
a5250def
WAA		 6698 err = -NFS4ERR_WRONGSEC;
6699
6700 /* try to use integrity protection with machine cred */
6701 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6702 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6703
6704 /*
6705 * if unable to use integrity protection, or SECINFO with
6706 * integrity protection returns NFS4ERR_WRONGSEC (which is
6707 * disallowed by spec, but exists in deployed servers) use
6708 * the current filesystem's rpc_client and the user cred.
6709 */
6710 if (err == -NFS4ERR_WRONGSEC)
6711 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6712
078ea3df
TM		 6713 trace_nfs4_secinfo(dir, name, err);
6714 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6715 &exception);
6716 } while (exception.retry);
6717 return err;
6718}
6719
557134a3 6720#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6721/*
6722 * Check the exchange flags returned by the server for invalid flags, having
6723 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6724 * DS flags set.
6725 */
6726static int nfs4_check_cl_exchange_flags(u32 flags)
6727{
6728 if (flags & ~EXCHGID4_FLAG_MASK_R)
6729 goto out_inval;
6730 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6731 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6732 goto out_inval;
6733 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6734 goto out_inval;
6735 return NFS_OK;
6736out_inval:
6737 return -NFS4ERR_INVAL;
6738}
6739
78fe0f41 6740static bool
79d4e1f0
CL		 6741nfs41_same_server_scope(struct nfs41_server_scope *a,
6742 struct nfs41_server_scope *b)
78fe0f41
WAA		 6743{
6744 if (a->server_scope_sz == b->server_scope_sz &&
6745 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6746 return true;
6747
6748 return false;
6749}
6750
7c44f1ae
WAA		 6751/*
6752 * nfs4_proc_bind_conn_to_session()
6753 *
6754 * The 4.1 client currently uses the same TCP connection for the
6755 * fore and backchannel.
6756 */
2cf047c9 6757int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6758{
6759 int status;
71a097c6
TM		 6760 struct nfs41_bind_conn_to_session_args args = {
6761 .client = clp,
6762 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6763 };
7c44f1ae
WAA		 6764 struct nfs41_bind_conn_to_session_res res;
6765 struct rpc_message msg = {
6766 .rpc_proc =
6767 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 6768 .rpc_argp = &args,
7c44f1ae 6769 .rpc_resp = &res,
2cf047c9 6770 .rpc_cred = cred,
7c44f1ae
WAA		 6771 };
6772
6773 dprintk("--> %s\n", __func__);
7c44f1ae 6774
71a097c6
TM		 6775 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6776 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6777 args.dir = NFS4_CDFC4_FORE;
7c44f1ae
WAA		 6778
6779 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6780 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 6781 if (status == 0) {
71a097c6 6782 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 6783 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6784 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6785 status = -EIO;
71a097c6 6786 goto out;
7c44f1ae 6787 }
71a097c6 6788 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 6789 dprintk("NFS: %s: Unexpected direction from server\n",
6790 __func__);
6791 status = -EIO;
71a097c6 6792 goto out;
7c44f1ae 6793 }
71a097c6 6794 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 6795 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6796 __func__);
6797 status = -EIO;
71a097c6 6798 goto out;
7c44f1ae
WAA		 6799 }
6800 }
7c44f1ae
WAA		 6801out:
6802 dprintk("<-- %s status= %d\n", __func__, status);
6803 return status;
6804}
6805
99fe60d0 6806/*
fa940720
WAA		 6807 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6808 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6809 */
6810static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6811 .how = SP4_MACH_CRED,
6812 .enforce.u.words = {
6813 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6814 1 << (OP_EXCHANGE_ID - 32) |
6815 1 << (OP_CREATE_SESSION - 32) |
6816 1 << (OP_DESTROY_SESSION - 32) |
6817 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6818 },
6819 .allow.u.words = {
6820 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6821 1 << (OP_LOCKU) |
6822 1 << (OP_COMMIT),
8b5bee2e 6823 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6824 1 << (OP_SECINFO_NO_NAME - 32) |
6825 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6826 1 << (OP_FREE_STATEID - 32) |
6827 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6828 }
6829};
6830
6831/*
6832 * Select the state protection mode for client `clp' given the server results
6833 * from exchange_id in `sp'.
99fe60d0 6834 *
2031cd1a
WAA		 6835 * Returns 0 on success, negative errno otherwise.
6836 */
6837static int nfs4_sp4_select_mode(struct nfs_client *clp,
6838 struct nfs41_state_protection *sp)
6839{
6840 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6841 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6842 1 << (OP_EXCHANGE_ID - 32) |
6843 1 << (OP_CREATE_SESSION - 32) |
6844 1 << (OP_DESTROY_SESSION - 32) |
6845 1 << (OP_DESTROY_CLIENTID - 32)
6846 };
6847 unsigned int i;
6848
6849 if (sp->how == SP4_MACH_CRED) {
6850 /* Print state protect result */
6851 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6852 for (i = 0; i <= LAST_NFS4_OP; i++) {
6853 if (test_bit(i, sp->enforce.u.longs))
6854 dfprintk(MOUNT, " enforce op %d\n", i);
6855 if (test_bit(i, sp->allow.u.longs))
6856 dfprintk(MOUNT, " allow op %d\n", i);
6857 }
6858
6859 /* make sure nothing is on enforce list that isn't supported */
6860 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6861 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6862 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6863 return -EINVAL;
6864 }
6865 }
6866
6867 /*
6868 * Minimal mode - state operations are allowed to use machine
6869 * credential. Note this already happens by default, so the
6870 * client doesn't have to do anything more than the negotiation.
6871 *
6872 * NOTE: we don't care if EXCHANGE_ID is in the list -
6873 * we're already using the machine cred for exchange_id
6874 * and will never use a different cred.
6875 */
6876 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6877 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6878 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6879 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6880 dfprintk(MOUNT, "sp4_mach_cred:\n");
6881 dfprintk(MOUNT, " minimal mode enabled\n");
6882 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6883 } else {
6884 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6885 return -EINVAL;
6886 }
fa940720
WAA		 6887
6888 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6889 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6890 dfprintk(MOUNT, " cleanup mode enabled\n");
6891 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6892 }
8b5bee2e
WAA		 6893
6894 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6895 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6896 dfprintk(MOUNT, " secinfo mode enabled\n");
6897 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6898 }
3787d506
WAA		 6899
6900 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6901 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6902 dfprintk(MOUNT, " stateid mode enabled\n");
6903 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6904 }
8c21c62c
WAA		 6905
6906 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6907 dfprintk(MOUNT, " write mode enabled\n");
6908 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6909 }
6910
6911 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6912 dfprintk(MOUNT, " commit mode enabled\n");
6913 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6914 }
2031cd1a
WAA		 6915 }
6916
6917 return 0;
6918}
6919
6920/*
6921 * _nfs4_proc_exchange_id()
6bbb4ae8 6922 *
2031cd1a 6923 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6924 */
2031cd1a
WAA		 6925static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6926 u32 sp4_how)
99fe60d0
BH		 6927{
6928 nfs4_verifier verifier;
6929 struct nfs41_exchange_id_args args = {
cd93710e 6930 .verifier = &verifier,
99fe60d0 6931 .client = clp,
cd3fadec 6932#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6933 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6934 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6935 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6936#else
6937 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6938 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6939#endif
99fe60d0
BH		 6940 };
6941 struct nfs41_exchange_id_res res = {
32b01310 6942 0
99fe60d0
BH		 6943 };
6944 int status;
6945 struct rpc_message msg = {
6946 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6947 .rpc_argp = &args,
6948 .rpc_resp = &res,
6949 .rpc_cred = cred,
6950 };
99fe60d0 6951
f092075d 6952 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 6953
6954 status = nfs4_init_uniform_client_string(clp);
6955 if (status)
3a6bb738 6956 goto out;
3a6bb738
JL		 6957
6958 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6bbb4ae8 6959 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 6960 clp->cl_owner_id);
99fe60d0 6961
acdeb69d 6962 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6963 GFP_NOFS);
acdeb69d 6964 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6965 status = -ENOMEM;
6966 goto out;
6967 }
78fe0f41 6968
79d4e1f0 6969 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6970 GFP_NOFS);
177313f1 6971 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6972 status = -ENOMEM;
acdeb69d 6973 goto out_server_owner;
abe9a6d5 6974 }
78fe0f41 6975
bbafffd2 6976 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6977 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6978 status = -ENOMEM;
6979 goto out_server_scope;
6980 }
6981
2031cd1a
WAA		 6982 switch (sp4_how) {
6983 case SP4_NONE:
6984 args.state_protect.how = SP4_NONE;
6985 break;
6986
6987 case SP4_MACH_CRED:
6988 args.state_protect = nfs4_sp4_mach_cred_request;
6989 break;
6990
6991 default:
6992 /* unsupported! */
6993 WARN_ON_ONCE(1);
6994 status = -EINVAL;
6b55970b 6995 goto out_impl_id;
2031cd1a
WAA		 6996 }
6997
1bd714f2 6998 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6999 trace_nfs4_exchange_id(clp, status);
177313f1 7000 if (status == 0)
32b01310 7001 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 7002
2031cd1a
WAA		 7003 if (status == 0)
7004 status = nfs4_sp4_select_mode(clp, &res.state_protect);
7005
acdeb69d 7006 if (status == 0) {
32b01310 7007 clp->cl_clientid = res.clientid;
e11259f9
TM		 7008 clp->cl_exchange_flags = res.flags;
7009 /* Client ID is not confirmed */
7010 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
7011 clear_bit(NFS4_SESSION_ESTABLISHED,
7012 &clp->cl_session->session_state);
32b01310 7013 clp->cl_seqid = res.seqid;
e11259f9 7014 }
32b01310 7015
acdeb69d
CL		 7016 kfree(clp->cl_serverowner);
7017 clp->cl_serverowner = res.server_owner;
7018 res.server_owner = NULL;
78fe0f41 7019
7d2ed9ac 7020 /* use the most recent implementation id */
59155546
CL		 7021 kfree(clp->cl_implid);
7022 clp->cl_implid = res.impl_id;
6b55970b 7023 res.impl_id = NULL;
7d2ed9ac 7024
177313f1 7025 if (clp->cl_serverscope != NULL &&
79d4e1f0 7026 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 7027 res.server_scope)) {
7028 dprintk("%s: server_scope mismatch detected\n",
7029 __func__);
7030 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 7031 kfree(clp->cl_serverscope);
7032 clp->cl_serverscope = NULL;
78fe0f41
WAA		 7033 }
7034
177313f1 7035 if (clp->cl_serverscope == NULL) {
79d4e1f0 7036 clp->cl_serverscope = res.server_scope;
6b55970b 7037 res.server_scope = NULL;
abe9a6d5 7038 }
6b55970b 7039 }
7d2ed9ac 7040
6b55970b
KM		 7041out_impl_id:
7042 kfree(res.impl_id);
7d2ed9ac 7043out_server_scope:
abe9a6d5 7044 kfree(res.server_scope);
6b55970b
KM		 7045out_server_owner:
7046 kfree(res.server_owner);
abe9a6d5 7047out:
177313f1 7048 if (clp->cl_implid != NULL)
6bbb4ae8 7049 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 7050 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 7051 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 7052 clp->cl_implid->date.seconds,
7053 clp->cl_implid->date.nseconds);
6bbb4ae8 7054 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 7055 return status;
7056}
7057
2031cd1a
WAA		 7058/*
7059 * nfs4_proc_exchange_id()
7060 *
7061 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7062 *
7063 * Since the clientid has expired, all compounds using sessions
7064 * associated with the stale clientid will be returning
7065 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7066 * be in some phase of session reset.
7067 *
7068 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7069 */
7070int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7071{
7072 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7073 int status;
7074
7075 /* try SP4_MACH_CRED if krb5i/p */
7076 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7077 authflavor == RPC_AUTH_GSS_KRB5P) {
7078 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
7079 if (!status)
7080 return 0;
7081 }
7082
7083 /* try SP4_NONE */
7084 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
7085}
7086
66245539
TM		 7087static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7088 struct rpc_cred *cred)
7089{
7090 struct rpc_message msg = {
7091 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7092 .rpc_argp = clp,
7093 .rpc_cred = cred,
7094 };
7095 int status;
7096
7097 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7098 trace_nfs4_destroy_clientid(clp, status);
66245539 7099 if (status)
02c67525 7100 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7101 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7102 return status;
7103}
7104
7105static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7106 struct rpc_cred *cred)
7107{
7108 unsigned int loop;
7109 int ret;
7110
7111 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7112 ret = _nfs4_proc_destroy_clientid(clp, cred);
7113 switch (ret) {
7114 case -NFS4ERR_DELAY:
7115 case -NFS4ERR_CLIENTID_BUSY:
7116 ssleep(1);
7117 break;
7118 default:
7119 return ret;
7120 }
7121 }
7122 return 0;
7123}
7124
7125int nfs4_destroy_clientid(struct nfs_client *clp)
7126{
7127 struct rpc_cred *cred;
7128 int ret = 0;
7129
7130 if (clp->cl_mvops->minor_version < 1)
7131 goto out;
7132 if (clp->cl_exchange_flags == 0)
7133 goto out;
05f4c350
CL		 7134 if (clp->cl_preserve_clid)
7135 goto out;
73d8bde5 7136 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7137 ret = nfs4_proc_destroy_clientid(clp, cred);
7138 if (cred)
7139 put_rpccred(cred);
7140 switch (ret) {
7141 case 0:
7142 case -NFS4ERR_STALE_CLIENTID:
7143 clp->cl_exchange_flags = 0;
7144 }
7145out:
7146 return ret;
7147}
7148
2050f0cc
AA		 7149struct nfs4_get_lease_time_data {
7150 struct nfs4_get_lease_time_args *args;
7151 struct nfs4_get_lease_time_res *res;
7152 struct nfs_client *clp;
7153};
7154
7155static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7156 void *calldata)
7157{
2050f0cc
AA		 7158 struct nfs4_get_lease_time_data *data =
7159 (struct nfs4_get_lease_time_data *)calldata;
7160
7161 dprintk("--> %s\n", __func__);
7162 /* just setup sequence, do not trigger session recovery
7163 since we're invoked within one */
d9afbd1b
TM		 7164 nfs41_setup_sequence(data->clp->cl_session,
7165 &data->args->la_seq_args,
7166 &data->res->lr_seq_res,
7167 task);
2050f0cc
AA		 7168 dprintk("<-- %s\n", __func__);
7169}
7170
7171/*
7172 * Called from nfs4_state_manager thread for session setup, so don't recover
7173 * from sequence operation or clientid errors.
7174 */
7175static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7176{
7177 struct nfs4_get_lease_time_data *data =
7178 (struct nfs4_get_lease_time_data *)calldata;
7179
7180 dprintk("--> %s\n", __func__);
14516c3a
TM		 7181 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7182 return;
2050f0cc
AA		 7183 switch (task->tk_status) {
7184 case -NFS4ERR_DELAY:
7185 case -NFS4ERR_GRACE:
7186 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7187 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7188 task->tk_status = 0;
a8a4ae3a
AA		 7189 /* fall through */
7190 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7191 rpc_restart_call_prepare(task);
2050f0cc
AA		 7192 return;
7193 }
2050f0cc
AA		 7194 dprintk("<-- %s\n", __func__);
7195}
7196
17280175 7197static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7198 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7199 .rpc_call_done = nfs4_get_lease_time_done,
7200};
7201
7202int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7203{
7204 struct rpc_task *task;
7205 struct nfs4_get_lease_time_args args;
7206 struct nfs4_get_lease_time_res res = {
7207 .lr_fsinfo = fsinfo,
7208 };
7209 struct nfs4_get_lease_time_data data = {
7210 .args = &args,
7211 .res = &res,
7212 .clp = clp,
7213 };
7214 struct rpc_message msg = {
7215 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7216 .rpc_argp = &args,
7217 .rpc_resp = &res,
7218 };
7219 struct rpc_task_setup task_setup = {
7220 .rpc_client = clp->cl_rpcclient,
7221 .rpc_message = &msg,
7222 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7223 .callback_data = &data,
7224 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7225 };
7226 int status;
7227
a9c92d6b 7228 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7229 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7230 dprintk("--> %s\n", __func__);
7231 task = rpc_run_task(&task_setup);
7232
7233 if (IS_ERR(task))
7234 status = PTR_ERR(task);
7235 else {
7236 status = task->tk_status;
7237 rpc_put_task(task);
7238 }
7239 dprintk("<-- %s return %d\n", __func__, status);
7240
7241 return status;
7242}
7243
fc931582
AA		 7244/*
7245 * Initialize the values to be used by the client in CREATE_SESSION
7246 * If nfs4_init_session set the fore channel request and response sizes,
7247 * use them.
7248 *
7249 * Set the back channel max_resp_sz_cached to zero to force the client to
7250 * always set csa_cachethis to FALSE because the current implementation
7251 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7252 */
7253static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7254{
18aad3d5
AA		 7255 unsigned int max_rqst_sz, max_resp_sz;
7256
7257 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7258 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7259
fc931582 7260 /* Fore channel attributes */
18aad3d5
AA		 7261 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7262 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7263 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7264 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7265
7266 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7267 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7268 __func__,
7269 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7270 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7271
7272 /* Back channel attributes */
fc931582
AA		 7273 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7274 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7275 args->bc_attrs.max_resp_sz_cached = 0;
7276 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7277 args->bc_attrs.max_reqs = 1;
7278
7279 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7280 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7281 __func__,
7282 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7283 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7284 args->bc_attrs.max_reqs);
7285}
7286
79969dd1
TM		 7287static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7288 struct nfs41_create_session_res *res)
8d35301d 7289{
43c2e885 7290 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7291 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7292
43c2e885
BF		 7293 if (rcvd->max_resp_sz > sent->max_resp_sz)
7294 return -EINVAL;
7295 /*
7296 * Our requested max_ops is the minimum we need; we're not
7297 * prepared to break up compounds into smaller pieces than that.
7298 * So, no point even trying to continue if the server won't
7299 * cooperate:
7300 */
7301 if (rcvd->max_ops < sent->max_ops)
7302 return -EINVAL;
7303 if (rcvd->max_reqs == 0)
7304 return -EINVAL;
b4b9a0c1
VG		 7305 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7306 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7307 return 0;
8d35301d
AA		 7308}
7309
79969dd1
TM		 7310static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7311 struct nfs41_create_session_res *res)
43c2e885
BF		 7312{
7313 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7314 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7315
b1c0df5f
TM		 7316 if (!(res->flags & SESSION4_BACK_CHAN))
7317 goto out;
43c2e885
BF		 7318 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7319 return -EINVAL;
7320 if (rcvd->max_resp_sz < sent->max_resp_sz)
7321 return -EINVAL;
7322 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7323 return -EINVAL;
7324 /* These would render the backchannel useless: */
b4b9a0c1 7325 if (rcvd->max_ops != sent->max_ops)
43c2e885 7326 return -EINVAL;
b4b9a0c1 7327 if (rcvd->max_reqs != sent->max_reqs)
43c2e885 7328 return -EINVAL;
b1c0df5f 7329out:
43c2e885
BF		 7330 return 0;
7331}
8d35301d 7332
8d35301d 7333static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7334 struct nfs41_create_session_res *res)
8d35301d 7335{
43c2e885 7336 int ret;
8d35301d 7337
79969dd1 7338 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7339 if (ret)
7340 return ret;
79969dd1
TM		 7341 return nfs4_verify_back_channel_attrs(args, res);
7342}
7343
7344static void nfs4_update_session(struct nfs4_session *session,
7345 struct nfs41_create_session_res *res)
7346{
7347 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7348 /* Mark client id and session as being confirmed */
7349 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7350 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7351 session->flags = res->flags;
7352 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7353 if (res->flags & SESSION4_BACK_CHAN)
7354 memcpy(&session->bc_attrs, &res->bc_attrs,
7355 sizeof(session->bc_attrs));
8d35301d
AA		 7356}
7357
848f5bda
TM		 7358static int _nfs4_proc_create_session(struct nfs_client *clp,
7359 struct rpc_cred *cred)
fc931582
AA		 7360{
7361 struct nfs4_session *session = clp->cl_session;
7362 struct nfs41_create_session_args args = {
7363 .client = clp,
79969dd1
TM		 7364 .clientid = clp->cl_clientid,
7365 .seqid = clp->cl_seqid,
fc931582
AA		 7366 .cb_program = NFS4_CALLBACK,
7367 };
79969dd1
TM		 7368 struct nfs41_create_session_res res;
7369
fc931582
AA		 7370 struct rpc_message msg = {
7371 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7372 .rpc_argp = &args,
7373 .rpc_resp = &res,
848f5bda 7374 .rpc_cred = cred,
fc931582
AA		 7375 };
7376 int status;
7377
7378 nfs4_init_channel_attrs(&args);
0f91421e 7379 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7380
1bd714f2 7381 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7382 trace_nfs4_create_session(clp, status);
fc931582 7383
43095d39 7384 if (!status) {
8d35301d 7385 /* Verify the session's negotiated channel_attrs values */
79969dd1 7386 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7387 /* Increment the clientid slot sequence id */
79969dd1
TM		 7388 if (clp->cl_seqid == res.seqid)
7389 clp->cl_seqid++;
7390 if (status)
7391 goto out;
7392 nfs4_update_session(session, &res);
fc931582 7393 }
79969dd1 7394out:
fc931582
AA		 7395 return status;
7396}
7397
7398/*
7399 * Issues a CREATE_SESSION operation to the server.
7400 * It is the responsibility of the caller to verify the session is
7401 * expired before calling this routine.
7402 */
848f5bda 7403int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7404{
7405 int status;
7406 unsigned *ptr;
fc931582
AA		 7407 struct nfs4_session *session = clp->cl_session;
7408
7409 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7410
848f5bda 7411 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7412 if (status)
7413 goto out;
7414
aacd5537
AA		 7415 /* Init or reset the session slot tables */
7416 status = nfs4_setup_session_slot_tables(session);
7417 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7418 if (status)
7419 goto out;
7420
7421 ptr = (unsigned *)&session->sess_id.data[0];
7422 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7423 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7424out:
7425 dprintk("<-- %s\n", __func__);
7426 return status;
7427}
7428
0f3e66c6
AA		 7429/*
7430 * Issue the over-the-wire RPC DESTROY_SESSION.
7431 * The caller must serialize access to this routine.
7432 */
848f5bda
TM		 7433int nfs4_proc_destroy_session(struct nfs4_session *session,
7434 struct rpc_cred *cred)
0f3e66c6 7435{
848f5bda
TM		 7436 struct rpc_message msg = {
7437 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7438 .rpc_argp = session,
7439 .rpc_cred = cred,
7440 };
0f3e66c6 7441 int status = 0;
0f3e66c6
AA		 7442
7443 dprintk("--> nfs4_proc_destroy_session\n");
7444
7445 /* session is still being setup */
e11259f9
TM		 7446 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7447 return 0;
0f3e66c6 7448
1bd714f2 7449 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7450 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7451
7452 if (status)
08106ac7 7453 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7454 "Session has been destroyed regardless...\n", status);
7455
7456 dprintk("<-- nfs4_proc_destroy_session\n");
7457 return status;
7458}
7459
fc01cea9
AA		 7460/*
7461 * Renew the cl_session lease.
7462 */
d5f8d3fe
TM		 7463struct nfs4_sequence_data {
7464 struct nfs_client *clp;
7465 struct nfs4_sequence_args args;
7466 struct nfs4_sequence_res res;
7467};
7468
dc96aef9
AB		 7469static void nfs41_sequence_release(void *data)
7470{
d5f8d3fe
TM		 7471 struct nfs4_sequence_data *calldata = data;
7472 struct nfs_client *clp = calldata->clp;
dc96aef9 7473
7135840f
AB		 7474 if (atomic_read(&clp->cl_count) > 1)
7475 nfs4_schedule_state_renewal(clp);
7476 nfs_put_client(clp);
d5f8d3fe 7477 kfree(calldata);
dc96aef9
AB		 7478}
7479
aa5190d0
TM		 7480static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7481{
7482 switch(task->tk_status) {
7483 case -NFS4ERR_DELAY:
aa5190d0
TM		 7484 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7485 return -EAGAIN;
7486 default:
0400a6b0 7487 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7488 }
7489 return 0;
7490}
7491
dc96aef9 7492static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7493{
d5f8d3fe
TM		 7494 struct nfs4_sequence_data *calldata = data;
7495 struct nfs_client *clp = calldata->clp;
fc01cea9 7496
14516c3a
TM		 7497 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7498 return;
fc01cea9 7499
c6d01c6f 7500 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7501 if (task->tk_status < 0) {
7502 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7503 if (atomic_read(&clp->cl_count) == 1)
7504 goto out;
fc01cea9 7505
aa5190d0
TM		 7506 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7507 rpc_restart_call_prepare(task);
fc01cea9
AA		 7508 return;
7509 }
7510 }
fc01cea9 7511 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7512out:
fc01cea9
AA		 7513 dprintk("<-- %s\n", __func__);
7514}
7515
7516static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7517{
d5f8d3fe
TM		 7518 struct nfs4_sequence_data *calldata = data;
7519 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7520 struct nfs4_sequence_args *args;
7521 struct nfs4_sequence_res *res;
7522
fc01cea9
AA		 7523 args = task->tk_msg.rpc_argp;
7524 res = task->tk_msg.rpc_resp;
7525
d9afbd1b 7526 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7527}
7528
7529static const struct rpc_call_ops nfs41_sequence_ops = {
7530 .rpc_call_done = nfs41_sequence_call_done,
7531 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7532 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7533};
7534
8fe72bac
TM		 7535static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7536 struct rpc_cred *cred,
7537 bool is_privileged)
fc01cea9 7538{
d5f8d3fe 7539 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7540 struct rpc_message msg = {
7541 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7542 .rpc_cred = cred,
7543 };
71ac6da9
TM		 7544 struct rpc_task_setup task_setup_data = {
7545 .rpc_client = clp->cl_rpcclient,
7546 .rpc_message = &msg,
8fe72bac 7547 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7548 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7549 };
fc01cea9 7550
7135840f 7551 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7552 return ERR_PTR(-EIO);
dfb4f309 7553 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7554 if (calldata == NULL) {
7135840f 7555 nfs_put_client(clp);
71ac6da9 7556 return ERR_PTR(-ENOMEM);
fc01cea9 7557 }
a9c92d6b 7558 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7559 if (is_privileged)
7560 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7561 msg.rpc_argp = &calldata->args;
7562 msg.rpc_resp = &calldata->res;
7563 calldata->clp = clp;
71ac6da9 7564 task_setup_data.callback_data = calldata;
fc01cea9 7565
71ac6da9
TM		 7566 return rpc_run_task(&task_setup_data);
7567}
7568
2f60ea6b 7569static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7570{
7571 struct rpc_task *task;
7572 int ret = 0;
7573
2f60ea6b 7574 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7575 return -EAGAIN;
8fe72bac 7576 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7577 if (IS_ERR(task))
7578 ret = PTR_ERR(task);
7579 else
bf294b41 7580 rpc_put_task_async(task);
71ac6da9
TM		 7581 dprintk("<-- %s status=%d\n", __func__, ret);
7582 return ret;
7583}
7584
7585static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7586{
7587 struct rpc_task *task;
7588 int ret;
7589
8fe72bac 7590 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7591 if (IS_ERR(task)) {
7592 ret = PTR_ERR(task);
7593 goto out;
7594 }
7595 ret = rpc_wait_for_completion_task(task);
be824167 7596 if (!ret)
71ac6da9
TM		 7597 ret = task->tk_status;
7598 rpc_put_task(task);
7599out:
7600 dprintk("<-- %s status=%d\n", __func__, ret);
7601 return ret;
fc01cea9
AA		 7602}
7603
fce5c838
RL		 7604struct nfs4_reclaim_complete_data {
7605 struct nfs_client *clp;
7606 struct nfs41_reclaim_complete_args arg;
7607 struct nfs41_reclaim_complete_res res;
7608};
7609
7610static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7611{
7612 struct nfs4_reclaim_complete_data *calldata = data;
7613
d9afbd1b
TM		 7614 nfs41_setup_sequence(calldata->clp->cl_session,
7615 &calldata->arg.seq_args,
7616 &calldata->res.seq_res,
7617 task);
fce5c838
RL		 7618}
7619
aa5190d0
TM		 7620static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7621{
7622 switch(task->tk_status) {
7623 case 0:
7624 case -NFS4ERR_COMPLETE_ALREADY:
7625 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7626 break;
7627 case -NFS4ERR_DELAY:
aa5190d0 7628 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7629 /* fall through */
7630 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7631 return -EAGAIN;
7632 default:
0400a6b0 7633 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7634 }
7635 return 0;
7636}
7637
fce5c838
RL		 7638static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7639{
7640 struct nfs4_reclaim_complete_data *calldata = data;
7641 struct nfs_client *clp = calldata->clp;
7642 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7643
7644 dprintk("--> %s\n", __func__);
14516c3a
TM		 7645 if (!nfs41_sequence_done(task, res))
7646 return;
fce5c838 7647
c6d01c6f 7648 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7649 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7650 rpc_restart_call_prepare(task);
7651 return;
7652 }
fce5c838
RL		 7653 dprintk("<-- %s\n", __func__);
7654}
7655
7656static void nfs4_free_reclaim_complete_data(void *data)
7657{
7658 struct nfs4_reclaim_complete_data *calldata = data;
7659
7660 kfree(calldata);
7661}
7662
7663static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7664 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7665 .rpc_call_done = nfs4_reclaim_complete_done,
7666 .rpc_release = nfs4_free_reclaim_complete_data,
7667};
7668
7669/*
7670 * Issue a global reclaim complete.
7671 */
965e9c23
TM		 7672static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7673 struct rpc_cred *cred)
fce5c838
RL		 7674{
7675 struct nfs4_reclaim_complete_data *calldata;
7676 struct rpc_task *task;
7677 struct rpc_message msg = {
7678 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7679 .rpc_cred = cred,
fce5c838
RL		 7680 };
7681 struct rpc_task_setup task_setup_data = {
7682 .rpc_client = clp->cl_rpcclient,
7683 .rpc_message = &msg,
7684 .callback_ops = &nfs4_reclaim_complete_call_ops,
7685 .flags = RPC_TASK_ASYNC,
7686 };
7687 int status = -ENOMEM;
7688
7689 dprintk("--> %s\n", __func__);
8535b2be 7690 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7691 if (calldata == NULL)
7692 goto out;
7693 calldata->clp = clp;
7694 calldata->arg.one_fs = 0;
fce5c838 7695
a9c92d6b 7696 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7697 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7698 msg.rpc_argp = &calldata->arg;
7699 msg.rpc_resp = &calldata->res;
7700 task_setup_data.callback_data = calldata;
7701 task = rpc_run_task(&task_setup_data);
acf82b85 7702 if (IS_ERR(task)) {
fce5c838 7703 status = PTR_ERR(task);
acf82b85
DC		 7704 goto out;
7705 }
c34c32ea
AA		 7706 status = nfs4_wait_for_completion_rpc_task(task);
7707 if (status == 0)
7708 status = task->tk_status;
fce5c838 7709 rpc_put_task(task);
acf82b85 7710 return 0;
fce5c838
RL		 7711out:
7712 dprintk("<-- %s status=%d\n", __func__, status);
7713 return status;
7714}
b1f69b75
AA		 7715
7716static void
7717nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7718{
7719 struct nfs4_layoutget *lgp = calldata;
c31663d4 7720 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7721 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7722
7723 dprintk("--> %s\n", __func__);
c31663d4
FI		 7724 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7725 * right now covering the LAYOUTGET we are about to send.
7726 * However, that is not so catastrophic, and there seems
7727 * to be no way to prevent it completely.
7728 */
6ba7db34 7729 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7730 &lgp->res.seq_res, task))
b1f69b75 7731 return;
cf7d63f1
FI		 7732 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7733 NFS_I(lgp->args.inode)->layout,
ce6ab4f2 7734 &lgp->args.range,
cf7d63f1
FI		 7735 lgp->args.ctx->state)) {
7736 rpc_exit(task, NFS4_OK);
cf7d63f1 7737 }
b1f69b75
AA		 7738}
7739
7740static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7741{
7742 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7743 struct inode *inode = lgp->args.inode;
7744 struct nfs_server *server = NFS_SERVER(inode);
7745 struct pnfs_layout_hdr *lo;
7746 struct nfs4_state *state = NULL;
ed7e5423 7747 unsigned long timeo, now, giveup;
b1f69b75 7748
ed7e5423 7749 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7750
6ba7db34 7751 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7752 goto out;
b1f69b75
AA		 7753
7754 switch (task->tk_status) {
7755 case 0:
ee314c2a 7756 goto out;
ed7e5423
BH		 7757 /*
7758 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7759 * (or clients) writing to the same RAID stripe
7760 */
b1f69b75 7761 case -NFS4ERR_LAYOUTTRYLATER:
ed7e5423
BH		 7762 /*
7763 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7764 * existing layout before getting a new one).
7765 */
b1f69b75 7766 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7767 timeo = rpc_get_timeout(task->tk_client);
7768 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7769 now = jiffies;
7770 if (time_after(giveup, now)) {
7771 unsigned long delay;
7772
7773 /* Delay for:
7774 * - Not less then NFS4_POLL_RETRY_MIN.
7775 * - One last time a jiffie before we give up
7776 * - exponential backoff (time_now minus start_attempt)
7777 */
7778 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7779 min((giveup - now - 1),
7780 now - lgp->args.timestamp));
7781
7782 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7783 __func__, delay);
7784 rpc_delay(task, delay);
7785 task->tk_status = 0;
7786 rpc_restart_call_prepare(task);
7787 goto out; /* Do not call nfs4_async_handle_error() */
7788 }
ee314c2a
TM		 7789 break;
7790 case -NFS4ERR_EXPIRED:
7791 case -NFS4ERR_BAD_STATEID:
7792 spin_lock(&inode->i_lock);
7793 lo = NFS_I(inode)->layout;
7794 if (!lo || list_empty(&lo->plh_segs)) {
7795 spin_unlock(&inode->i_lock);
7796 /* If the open stateid was bad, then recover it. */
7797 state = lgp->args.ctx->state;
7798 } else {
7799 LIST_HEAD(head);
7800
defb8460
CH		 7801 /*
7802 * Mark the bad layout state as invalid, then retry
7803 * with the current stateid.
7804 */
ee314c2a
TM		 7805 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7806 spin_unlock(&inode->i_lock);
ee314c2a 7807 pnfs_free_lseg_list(&head);
defb8460
CH		 7808
7809 task->tk_status = 0;
7810 rpc_restart_call_prepare(task);
b1f69b75
AA		 7811 }
7812 }
8478eaa1 7813 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
ee314c2a
TM		 7814 rpc_restart_call_prepare(task);
7815out:
b1f69b75
AA		 7816 dprintk("<-- %s\n", __func__);
7817}
7818
8554116e
IK		 7819static size_t max_response_pages(struct nfs_server *server)
7820{
7821 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7822 return nfs_page_array_len(0, max_resp_sz);
7823}
7824
7825static void nfs4_free_pages(struct page **pages, size_t size)
7826{
7827 int i;
7828
7829 if (!pages)
7830 return;
7831
7832 for (i = 0; i < size; i++) {
7833 if (!pages[i])
7834 break;
7835 __free_page(pages[i]);
7836 }
7837 kfree(pages);
7838}
7839
7840static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7841{
7842 struct page **pages;
7843 int i;
7844
7845 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7846 if (!pages) {
7847 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7848 return NULL;
7849 }
7850
7851 for (i = 0; i < size; i++) {
7852 pages[i] = alloc_page(gfp_flags);
7853 if (!pages[i]) {
7854 dprintk("%s: failed to allocate page\n", __func__);
7855 nfs4_free_pages(pages, size);
7856 return NULL;
7857 }
7858 }
7859
7860 return pages;
7861}
7862
b1f69b75
AA		 7863static void nfs4_layoutget_release(void *calldata)
7864{
7865 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7866 struct inode *inode = lgp->args.inode;
7867 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7868 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7869
7870 dprintk("--> %s\n", __func__);
8554116e 7871 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7872 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7873 put_nfs_open_context(lgp->args.ctx);
7874 kfree(calldata);
7875 dprintk("<-- %s\n", __func__);
7876}
7877
7878static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7879 .rpc_call_prepare = nfs4_layoutget_prepare,
7880 .rpc_call_done = nfs4_layoutget_done,
7881 .rpc_release = nfs4_layoutget_release,
7882};
7883
a0b0a6e3
TM		 7884struct pnfs_layout_segment *
7885nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7886{
a47970ff
WAA		 7887 struct inode *inode = lgp->args.inode;
7888 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7889 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7890 struct rpc_task *task;
7891 struct rpc_message msg = {
7892 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7893 .rpc_argp = &lgp->args,
7894 .rpc_resp = &lgp->res,
6ab59344 7895 .rpc_cred = lgp->cred,
b1f69b75
AA		 7896 };
7897 struct rpc_task_setup task_setup_data = {
7898 .rpc_client = server->client,
7899 .rpc_message = &msg,
7900 .callback_ops = &nfs4_layoutget_call_ops,
7901 .callback_data = lgp,
7902 .flags = RPC_TASK_ASYNC,
7903 };
a0b0a6e3 7904 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7905 int status = 0;
7906
7907 dprintk("--> %s\n", __func__);
7908
4bd5a980
PT		 7909 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7910 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7911
8554116e
IK		 7912 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7913 if (!lgp->args.layout.pages) {
7914 nfs4_layoutget_release(lgp);
a0b0a6e3 7915 return ERR_PTR(-ENOMEM);
8554116e
IK		 7916 }
7917 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7918 lgp->args.timestamp = jiffies;
8554116e 7919
35124a09 7920 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7921 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7922 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 7923
b1f69b75
AA		 7924 task = rpc_run_task(&task_setup_data);
7925 if (IS_ERR(task))
a0b0a6e3 7926 return ERR_CAST(task);
b1f69b75 7927 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7928 if (status == 0)
7929 status = task->tk_status;
1037e6ea
TM		 7930 trace_nfs4_layoutget(lgp->args.ctx,
7931 &lgp->args.range,
7932 &lgp->res.range,
7933 status);
085b7a45
WAA		 7934 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7935 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7936 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7937 rpc_put_task(task);
7938 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7939 if (status)
7940 return ERR_PTR(status);
7941 return lseg;
b1f69b75
AA		 7942}
7943
cbe82603
BH		 7944static void
7945nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7946{
7947 struct nfs4_layoutreturn *lrp = calldata;
7948
7949 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7950 nfs41_setup_sequence(lrp->clp->cl_session,
7951 &lrp->args.seq_args,
7952 &lrp->res.seq_res,
7953 task);
cbe82603
BH		 7954}
7955
7956static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7957{
7958 struct nfs4_layoutreturn *lrp = calldata;
7959 struct nfs_server *server;
7960
7961 dprintk("--> %s\n", __func__);
7962
6ba7db34 7963 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7964 return;
7965
7966 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 7967 switch (task->tk_status) {
7968 default:
7969 task->tk_status = 0;
7970 case 0:
7971 break;
7972 case -NFS4ERR_DELAY:
8478eaa1 7973 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 7974 break;
d00c5d43 7975 rpc_restart_call_prepare(task);
cbe82603
BH		 7976 return;
7977 }
cbe82603
BH		 7978 dprintk("<-- %s\n", __func__);
7979}
7980
7981static void nfs4_layoutreturn_release(void *calldata)
7982{
7983 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7984 struct pnfs_layout_hdr *lo = lrp->args.layout;
c5d73716 7985 LIST_HEAD(freeme);
cbe82603
BH		 7986
7987 dprintk("--> %s\n", __func__);
849b286f
TM		 7988 spin_lock(&lo->plh_inode->i_lock);
7989 if (lrp->res.lrs_present)
7990 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
c5d73716 7991 pnfs_mark_matching_lsegs_invalid(lo, &freeme, &lrp->args.range);
d67ae825 7992 pnfs_clear_layoutreturn_waitbit(lo);
849b286f
TM		 7993 lo->plh_block_lgets--;
7994 spin_unlock(&lo->plh_inode->i_lock);
c5d73716 7995 pnfs_free_lseg_list(&freeme);
70c3bd2b 7996 pnfs_put_layout_hdr(lrp->args.layout);
5a0ec8ac 7997 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 7998 kfree(calldata);
7999 dprintk("<-- %s\n", __func__);
8000}
8001
8002static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
8003 .rpc_call_prepare = nfs4_layoutreturn_prepare,
8004 .rpc_call_done = nfs4_layoutreturn_done,
8005 .rpc_release = nfs4_layoutreturn_release,
8006};
8007
6c16605d 8008int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 8009{
8010 struct rpc_task *task;
8011 struct rpc_message msg = {
8012 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8013 .rpc_argp = &lrp->args,
8014 .rpc_resp = &lrp->res,
9556000d 8015 .rpc_cred = lrp->cred,
cbe82603
BH		 8016 };
8017 struct rpc_task_setup task_setup_data = {
1771c577 8018 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8019 .rpc_message = &msg,
8020 .callback_ops = &nfs4_layoutreturn_call_ops,
8021 .callback_data = lrp,
8022 };
6c16605d 8023 int status = 0;
cbe82603
BH		 8024
8025 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8026 if (!sync) {
8027 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8028 if (!lrp->inode) {
8029 nfs4_layoutreturn_release(lrp);
8030 return -EAGAIN;
8031 }
8032 task_setup_data.flags |= RPC_TASK_ASYNC;
8033 }
a9c92d6b 8034 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8035 task = rpc_run_task(&task_setup_data);
8036 if (IS_ERR(task))
8037 return PTR_ERR(task);
5a0ec8ac
TM		 8038 if (sync)
8039 status = task->tk_status;
1037e6ea 8040 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 8041 dprintk("<-- %s status=%d\n", __func__, status);
8042 rpc_put_task(task);
8043 return status;
8044}
8045
b1f69b75 8046static int
cd5875fe
TM		 8047_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8048 struct pnfs_device *pdev,
8049 struct rpc_cred *cred)
b1f69b75
AA		 8050{
8051 struct nfs4_getdeviceinfo_args args = {
8052 .pdev = pdev,
4e590803
TM		 8053 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8054 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8055 };
8056 struct nfs4_getdeviceinfo_res res = {
8057 .pdev = pdev,
8058 };
8059 struct rpc_message msg = {
8060 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8061 .rpc_argp = &args,
8062 .rpc_resp = &res,
cd5875fe 8063 .rpc_cred = cred,
b1f69b75
AA		 8064 };
8065 int status;
8066
8067 dprintk("--> %s\n", __func__);
7c513058 8068 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8069 if (res.notification & ~args.notify_types)
8070 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8071 if (res.notification != args.notify_types)
8072 pdev->nocache = 1;
4e590803 8073
b1f69b75
AA		 8074 dprintk("<-- %s status=%d\n", __func__, status);
8075
8076 return status;
8077}
8078
cd5875fe
TM		 8079int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8080 struct pnfs_device *pdev,
8081 struct rpc_cred *cred)
b1f69b75
AA		 8082{
8083 struct nfs4_exception exception = { };
8084 int err;
8085
8086 do {
8087 err = nfs4_handle_exception(server,
cd5875fe 8088 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8089 &exception);
8090 } while (exception.retry);
8091 return err;
8092}
8093EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8094
863a3c6c
AA		 8095static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8096{
8097 struct nfs4_layoutcommit_data *data = calldata;
8098 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 8099 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 8100
d9afbd1b
TM		 8101 nfs41_setup_sequence(session,
8102 &data->args.seq_args,
8103 &data->res.seq_res,
8104 task);
863a3c6c
AA		 8105}
8106
8107static void
8108nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8109{
8110 struct nfs4_layoutcommit_data *data = calldata;
8111 struct nfs_server *server = NFS_SERVER(data->args.inode);
8112
6ba7db34 8113 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8114 return;
8115
8116 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8117 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8118 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8119 case -NFS4ERR_BADLAYOUT: /* no layout */
8120 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8121 task->tk_status = 0;
e59d27e0 8122 case 0:
e59d27e0
TM		 8123 break;
8124 default:
8478eaa1 8125 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8126 rpc_restart_call_prepare(task);
8127 return;
8128 }
8129 }
863a3c6c
AA		 8130}
8131
8132static void nfs4_layoutcommit_release(void *calldata)
8133{
8134 struct nfs4_layoutcommit_data *data = calldata;
8135
db29c089 8136 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8137 nfs_post_op_update_inode_force_wcc(data->args.inode,
8138 data->res.fattr);
863a3c6c 8139 put_rpccred(data->cred);
472e2594 8140 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8141 kfree(data);
8142}
8143
8144static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8145 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8146 .rpc_call_done = nfs4_layoutcommit_done,
8147 .rpc_release = nfs4_layoutcommit_release,
8148};
8149
8150int
ef311537 8151nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8152{
8153 struct rpc_message msg = {
8154 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8155 .rpc_argp = &data->args,
8156 .rpc_resp = &data->res,
8157 .rpc_cred = data->cred,
8158 };
8159 struct rpc_task_setup task_setup_data = {
8160 .task = &data->task,
8161 .rpc_client = NFS_CLIENT(data->args.inode),
8162 .rpc_message = &msg,
8163 .callback_ops = &nfs4_layoutcommit_ops,
8164 .callback_data = data,
863a3c6c
AA		 8165 };
8166 struct rpc_task *task;
8167 int status = 0;
8168
b4839ebe
KM		 8169 dprintk("NFS: initiating layoutcommit call. sync %d "
8170 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8171 data->args.lastbytewritten,
8172 data->args.inode->i_ino);
8173
472e2594
TM		 8174 if (!sync) {
8175 data->inode = nfs_igrab_and_active(data->args.inode);
8176 if (data->inode == NULL) {
8177 nfs4_layoutcommit_release(data);
8178 return -EAGAIN;
8179 }
8180 task_setup_data.flags = RPC_TASK_ASYNC;
8181 }
a9c92d6b 8182 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8183 task = rpc_run_task(&task_setup_data);
8184 if (IS_ERR(task))
8185 return PTR_ERR(task);
472e2594
TM		 8186 if (sync)
8187 status = task->tk_status;
1037e6ea 8188 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 8189 dprintk("%s: status %d\n", __func__, status);
8190 rpc_put_task(task);
8191 return status;
8192}
fca78d6d 8193
97431204
AA		 8194/**
8195 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8196 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8197 */
fca78d6d
BS		 8198static int
8199_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8200 struct nfs_fsinfo *info,
8201 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8202{
8203 struct nfs41_secinfo_no_name_args args = {
8204 .style = SECINFO_STYLE_CURRENT_FH,
8205 };
8206 struct nfs4_secinfo_res res = {
8207 .flavors = flavors,
8208 };
8209 struct rpc_message msg = {
8210 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8211 .rpc_argp = &args,
8212 .rpc_resp = &res,
8213 };
b1b3e136 8214 struct rpc_clnt *clnt = server->client;
7cb852df 8215 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8216 int status;
8217
8218 if (use_integrity) {
8219 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8220 cred = nfs4_get_clid_cred(server->nfs_client);
8221 msg.rpc_cred = cred;
b1b3e136
WAA		 8222 }
8223
8224 dprintk("--> %s\n", __func__);
8225 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8226 &res.seq_res, 0);
8227 dprintk("<-- %s status=%d\n", __func__, status);
8228
7cb852df
WAA		 8229 if (cred)
8230 put_rpccred(cred);
b1b3e136
WAA		 8231
8232 return status;
fca78d6d
BS		 8233}
8234
8235static int
8236nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8237 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8238{
8239 struct nfs4_exception exception = { };
8240 int err;
8241 do {
b1b3e136
WAA		 8242 /* first try using integrity protection */
8243 err = -NFS4ERR_WRONGSEC;
8244
8245 /* try to use integrity protection with machine cred */
8246 if (_nfs4_is_integrity_protected(server->nfs_client))
8247 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8248 flavors, true);
8249
8250 /*
8251 * if unable to use integrity protection, or SECINFO with
8252 * integrity protection returns NFS4ERR_WRONGSEC (which is
8253 * disallowed by spec, but exists in deployed servers) use
8254 * the current filesystem's rpc_client and the user cred.
8255 */
8256 if (err == -NFS4ERR_WRONGSEC)
8257 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8258 flavors, false);
8259
fca78d6d
BS		 8260 switch (err) {
8261 case 0:
8262 case -NFS4ERR_WRONGSEC:
78b19bae 8263 case -ENOTSUPP:
05e9cfb4 8264 goto out;
fca78d6d
BS		 8265 default:
8266 err = nfs4_handle_exception(server, err, &exception);
8267 }
8268 } while (exception.retry);
05e9cfb4 8269out:
fca78d6d
BS		 8270 return err;
8271}
8272
8273static int
8274nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8275 struct nfs_fsinfo *info)
8276{
8277 int err;
8278 struct page *page;
367156d9 8279 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8280 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8281 struct nfs4_secinfo4 *secinfo;
8282 int i;
fca78d6d
BS		 8283
8284 page = alloc_page(GFP_KERNEL);
8285 if (!page) {
8286 err = -ENOMEM;
8287 goto out;
8288 }
8289
8290 flavors = page_address(page);
8291 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8292
8293 /*
8294 * Fall back on "guess and check" method if
8295 * the server doesn't support SECINFO_NO_NAME
8296 */
78b19bae 8297 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8298 err = nfs4_find_root_sec(server, fhandle, info);
8299 goto out_freepage;
8300 }
8301 if (err)
8302 goto out_freepage;
8303
58a8cf12
WAA		 8304 for (i = 0; i < flavors->num_flavors; i++) {
8305 secinfo = &flavors->flavors[i];
8306
8307 switch (secinfo->flavor) {
8308 case RPC_AUTH_NULL:
8309 case RPC_AUTH_UNIX:
8310 case RPC_AUTH_GSS:
8311 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8312 &secinfo->flavor_info);
8313 break;
8314 default:
8315 flavor = RPC_AUTH_MAXFLAVOR;
8316 break;
8317 }
8318
4d4b69dd
WAA		 8319 if (!nfs_auth_info_match(&server->auth_info, flavor))
8320 flavor = RPC_AUTH_MAXFLAVOR;
8321
58a8cf12
WAA		 8322 if (flavor != RPC_AUTH_MAXFLAVOR) {
8323 err = nfs4_lookup_root_sec(server, fhandle,
8324 info, flavor);
8325 if (!err)
8326 break;
8327 }
8328 }
8329
8330 if (flavor == RPC_AUTH_MAXFLAVOR)
8331 err = -EPERM;
fca78d6d
BS		 8332
8333out_freepage:
8334 put_page(page);
8335 if (err == -EACCES)
8336 return -EPERM;
8337out:
8338 return err;
8339}
1cab0652 8340
ab7cb0df
TM		 8341static int _nfs41_test_stateid(struct nfs_server *server,
8342 nfs4_stateid *stateid,
8343 struct rpc_cred *cred)
7d974794
BS		 8344{
8345 int status;
8346 struct nfs41_test_stateid_args args = {
1cab0652 8347 .stateid = stateid,
7d974794
BS		 8348 };
8349 struct nfs41_test_stateid_res res;
8350 struct rpc_message msg = {
8351 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8352 .rpc_argp = &args,
8353 .rpc_resp = &res,
ab7cb0df 8354 .rpc_cred = cred,
7d974794 8355 };
3787d506
WAA		 8356 struct rpc_clnt *rpc_client = server->client;
8357
8358 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8359 &rpc_client, &msg);
1cab0652 8360
38527b15 8361 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8362 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8363 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8364 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8365 &args.seq_args, &res.seq_res);
38527b15
CL		 8366 if (status != NFS_OK) {
8367 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8368 return status;
38527b15
CL		 8369 }
8370 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8371 return -res.status;
7d974794
BS		 8372}
8373
38527b15
CL		 8374/**
8375 * nfs41_test_stateid - perform a TEST_STATEID operation
8376 *
8377 * @server: server / transport on which to perform the operation
8378 * @stateid: state ID to test
ab7cb0df 8379 * @cred: credential
38527b15
CL		 8380 *
8381 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8382 * Otherwise a negative NFS4ERR value is returned if the operation
8383 * failed or the state ID is not currently valid.
8384 */
ab7cb0df
TM		 8385static int nfs41_test_stateid(struct nfs_server *server,
8386 nfs4_stateid *stateid,
8387 struct rpc_cred *cred)
7d974794
BS		 8388{
8389 struct nfs4_exception exception = { };
8390 int err;
8391 do {
ab7cb0df 8392 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8393 if (err != -NFS4ERR_DELAY)
8394 break;
8395 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8396 } while (exception.retry);
8397 return err;
8398}
9aeda35f 8399
7c1d5fae
TM		 8400struct nfs_free_stateid_data {
8401 struct nfs_server *server;
8402 struct nfs41_free_stateid_args args;
9aeda35f 8403 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8404};
8405
8406static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8407{
8408 struct nfs_free_stateid_data *data = calldata;
8409 nfs41_setup_sequence(nfs4_get_session(data->server),
8410 &data->args.seq_args,
8411 &data->res.seq_res,
8412 task);
8413}
8414
8415static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8416{
8417 struct nfs_free_stateid_data *data = calldata;
8418
8419 nfs41_sequence_done(task, &data->res.seq_res);
8420
8421 switch (task->tk_status) {
8422 case -NFS4ERR_DELAY:
8478eaa1 8423 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8424 rpc_restart_call_prepare(task);
8425 }
8426}
8427
8428static void nfs41_free_stateid_release(void *calldata)
8429{
8430 kfree(calldata);
8431}
8432
17f26b12 8433static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8434 .rpc_call_prepare = nfs41_free_stateid_prepare,
8435 .rpc_call_done = nfs41_free_stateid_done,
8436 .rpc_release = nfs41_free_stateid_release,
8437};
8438
8439static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8440 nfs4_stateid *stateid,
ab7cb0df 8441 struct rpc_cred *cred,
7c1d5fae
TM		 8442 bool privileged)
8443{
9aeda35f
BS		 8444 struct rpc_message msg = {
8445 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8446 .rpc_cred = cred,
9aeda35f 8447 };
7c1d5fae
TM		 8448 struct rpc_task_setup task_setup = {
8449 .rpc_client = server->client,
8450 .rpc_message = &msg,
8451 .callback_ops = &nfs41_free_stateid_ops,
8452 .flags = RPC_TASK_ASYNC,
8453 };
8454 struct nfs_free_stateid_data *data;
9aeda35f 8455
3787d506
WAA		 8456 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8457 &task_setup.rpc_client, &msg);
8458
38527b15 8459 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8460 data = kmalloc(sizeof(*data), GFP_NOFS);
8461 if (!data)
8462 return ERR_PTR(-ENOMEM);
8463 data->server = server;
8464 nfs4_stateid_copy(&data->args.stateid, stateid);
8465
8466 task_setup.callback_data = data;
8467
8468 msg.rpc_argp = &data->args;
8469 msg.rpc_resp = &data->res;
a9c92d6b 8470 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8471 if (privileged)
8472 nfs4_set_sequence_privileged(&data->args.seq_args);
8473
8474 return rpc_run_task(&task_setup);
9aeda35f
BS		 8475}
8476
38527b15
CL		 8477/**
8478 * nfs41_free_stateid - perform a FREE_STATEID operation
8479 *
8480 * @server: server / transport on which to perform the operation
8481 * @stateid: state ID to release
ab7cb0df 8482 * @cred: credential
38527b15
CL		 8483 *
8484 * Returns NFS_OK if the server freed "stateid". Otherwise a
8485 * negative NFS4ERR value is returned.
8486 */
ab7cb0df
TM		 8487static int nfs41_free_stateid(struct nfs_server *server,
8488 nfs4_stateid *stateid,
8489 struct rpc_cred *cred)
9aeda35f 8490{
7c1d5fae
TM		 8491 struct rpc_task *task;
8492 int ret;
8493
ab7cb0df 8494 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8495 if (IS_ERR(task))
8496 return PTR_ERR(task);
8497 ret = rpc_wait_for_completion_task(task);
8498 if (!ret)
8499 ret = task->tk_status;
8500 rpc_put_task(task);
8501 return ret;
9aeda35f 8502}
36281caa 8503
f1cdae87
JL		 8504static void
8505nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8506{
8507 struct rpc_task *task;
ab7cb0df 8508 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8509
ab7cb0df 8510 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8511 nfs4_free_lock_state(server, lsp);
8512 if (IS_ERR(task))
f1cdae87 8513 return;
c8b2d0bf 8514 rpc_put_task(task);
c8b2d0bf
TM		 8515}
8516
36281caa
TM		 8517static bool nfs41_match_stateid(const nfs4_stateid *s1,
8518 const nfs4_stateid *s2)
8519{
2d2f24ad 8520 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8521 return false;
8522
2d2f24ad 8523 if (s1->seqid == s2->seqid)
36281caa 8524 return true;
2d2f24ad 8525 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8526 return true;
8527
8528 return false;
8529}
8530
557134a3
AA		 8531#endif /* CONFIG_NFS_V4_1 */
8532
36281caa
TM		 8533static bool nfs4_match_stateid(const nfs4_stateid *s1,
8534 const nfs4_stateid *s2)
8535{
f597c537 8536 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8537}
8538
8539
17280175 8540static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8541 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8542 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8543 .recover_open = nfs4_open_reclaim,
8544 .recover_lock = nfs4_lock_reclaim,
591d71cb 8545 .establish_clid = nfs4_init_clientid,
05f4c350 8546 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8547};
8548
591d71cb 8549#if defined(CONFIG_NFS_V4_1)
17280175 8550static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8551 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8552 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8553 .recover_open = nfs4_open_reclaim,
8554 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8555 .establish_clid = nfs41_init_clientid,
fce5c838 8556 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8557 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8558};
8559#endif /* CONFIG_NFS_V4_1 */
8560
17280175 8561static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8562 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8563 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8564 .recover_open = nfs40_open_expired,
591d71cb
AA		 8565 .recover_lock = nfs4_lock_expired,
8566 .establish_clid = nfs4_init_clientid,
8567};
8568
8569#if defined(CONFIG_NFS_V4_1)
17280175 8570static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8571 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8572 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8573 .recover_open = nfs41_open_expired,
8574 .recover_lock = nfs41_lock_expired,
4d643d1d 8575 .establish_clid = nfs41_init_clientid,
1da177e4 8576};
591d71cb 8577#endif /* CONFIG_NFS_V4_1 */
1da177e4 8578
17280175 8579static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8580 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8581 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8582 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8583};
8584
8585#if defined(CONFIG_NFS_V4_1)
17280175 8586static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8587 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8588 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8589 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8590};
8591#endif
8592
ec011fe8 8593static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8594 .get_locations = _nfs40_proc_get_locations,
44c99933 8595 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8596};
8597
8598#if defined(CONFIG_NFS_V4_1)
8599static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8600 .get_locations = _nfs41_proc_get_locations,
44c99933 8601 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8602};
8603#endif /* CONFIG_NFS_V4_1 */
8604
97dc1359
TM		 8605static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8606 .minor_version = 0,
39c6daae
TM		 8607 .init_caps = NFS_CAP_READDIRPLUS
8608 | NFS_CAP_ATOMIC_OPEN
39c6daae 8609 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8610 .init_client = nfs40_init_client,
8611 .shutdown_client = nfs40_shutdown_client,
36281caa 8612 .match_stateid = nfs4_match_stateid,
fca78d6d 8613 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8614 .free_lock_state = nfs4_release_lockowner,
63f5f796 8615 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 8616 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8617 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8618 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8619 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8620 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8621};
8622
8623#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 8624static struct nfs_seqid *
8625nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8626{
8627 return NULL;
8628}
8629
97dc1359
TM		 8630static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8631 .minor_version = 1,
39c6daae
TM		 8632 .init_caps = NFS_CAP_READDIRPLUS
8633 | NFS_CAP_ATOMIC_OPEN
3b66486c 8634 | NFS_CAP_POSIX_LOCK
49f9a0fa 8635 | NFS_CAP_STATEID_NFSV41
e983120e 8636 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8637 .init_client = nfs41_init_client,
8638 .shutdown_client = nfs41_shutdown_client,
36281caa 8639 .match_stateid = nfs41_match_stateid,
fca78d6d 8640 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8641 .free_lock_state = nfs41_free_lock_state,
63f5f796 8642 .alloc_seqid = nfs_alloc_no_seqid,
9915ea7e 8643 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8644 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8645 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8646 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8647 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8648};
8649#endif
8650
42c2c424
SD		 8651#if defined(CONFIG_NFS_V4_2)
8652static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8653 .minor_version = 2,
7017310a
BS		 8654 .init_caps = NFS_CAP_READDIRPLUS
8655 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 8656 | NFS_CAP_POSIX_LOCK
8657 | NFS_CAP_STATEID_NFSV41
e983120e 8658 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 8659 | NFS_CAP_ALLOCATE
624bd5b7 8660 | NFS_CAP_DEALLOCATE
6c5a0d89
TM		 8661 | NFS_CAP_SEEK
8662 | NFS_CAP_LAYOUTSTATS,
abf79bb3
CL		 8663 .init_client = nfs41_init_client,
8664 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8665 .match_stateid = nfs41_match_stateid,
8666 .find_root_sec = nfs41_find_root_sec,
7017310a 8667 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8668 .call_sync_ops = &nfs41_call_sync_ops,
63f5f796 8669 .alloc_seqid = nfs_alloc_no_seqid,
42c2c424
SD		 8670 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8671 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8672 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 8673 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 8674};
8675#endif
8676
97dc1359
TM		 8677const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8678 [0] = &nfs_v4_0_minor_ops,
8679#if defined(CONFIG_NFS_V4_1)
8680 [1] = &nfs_v4_1_minor_ops,
8681#endif
42c2c424
SD		 8682#if defined(CONFIG_NFS_V4_2)
8683 [2] = &nfs_v4_2_minor_ops,
8684#endif
97dc1359
TM		 8685};
8686
17f26b12 8687static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8688 .create = nfs_create,
8689 .lookup = nfs_lookup,
8690 .atomic_open = nfs_atomic_open,
8691 .link = nfs_link,
8692 .unlink = nfs_unlink,
8693 .symlink = nfs_symlink,
8694 .mkdir = nfs_mkdir,
8695 .rmdir = nfs_rmdir,
8696 .mknod = nfs_mknod,
8697 .rename = nfs_rename,
8698 .permission = nfs_permission,
8699 .getattr = nfs_getattr,
8700 .setattr = nfs_setattr,
8701 .getxattr = generic_getxattr,
8702 .setxattr = generic_setxattr,
8703 .listxattr = generic_listxattr,
8704 .removexattr = generic_removexattr,
8705};
8706
92e1d5be 8707static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8708 .permission = nfs_permission,
8709 .getattr = nfs_getattr,
8710 .setattr = nfs_setattr,
64c2ce8b
AK		 8711 .getxattr = generic_getxattr,
8712 .setxattr = generic_setxattr,
8713 .listxattr = generic_listxattr,
8714 .removexattr = generic_removexattr,
6b3b5496
BF		 8715};
8716
509de811 8717const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8718 .version = 4, /* protocol version */
8719 .dentry_ops = &nfs4_dentry_operations,
8720 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8721 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8722 .file_ops = &nfs4_file_operations,
1da177e4 8723 .getroot = nfs4_proc_get_root,
281cad46 8724 .submount = nfs4_submount,
ff9099f2 8725 .try_mount = nfs4_try_mount,
1da177e4
LT		 8726 .getattr = nfs4_proc_getattr,
8727 .setattr = nfs4_proc_setattr,
8728 .lookup = nfs4_proc_lookup,
8729 .access = nfs4_proc_access,
8730 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8731 .create = nfs4_proc_create,
8732 .remove = nfs4_proc_remove,
8733 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8734 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8735 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8736 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8737 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8738 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8739 .link = nfs4_proc_link,
8740 .symlink = nfs4_proc_symlink,
8741 .mkdir = nfs4_proc_mkdir,
8742 .rmdir = nfs4_proc_remove,
8743 .readdir = nfs4_proc_readdir,
8744 .mknod = nfs4_proc_mknod,
8745 .statfs = nfs4_proc_statfs,
8746 .fsinfo = nfs4_proc_fsinfo,
8747 .pathconf = nfs4_proc_pathconf,
e9326dca 8748 .set_capabilities = nfs4_server_capabilities,
1da177e4 8749 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8750 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8751 .read_setup = nfs4_proc_read_setup,
ec06c096 8752 .read_done = nfs4_read_done,
1da177e4 8753 .write_setup = nfs4_proc_write_setup,
788e7a89 8754 .write_done = nfs4_write_done,
1da177e4 8755 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8756 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8757 .commit_done = nfs4_commit_done,
1da177e4 8758 .lock = nfs4_proc_lock,
e50a1c2e 8759 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8760 .close_context = nfs4_close_context,
2b484297 8761 .open_context = nfs4_atomic_open,
011e2a7f 8762 .have_delegation = nfs4_have_delegation,
57ec14c5 8763 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8764 .alloc_client = nfs4_alloc_client,
45a52a02 8765 .init_client = nfs4_init_client,
cdb7eced 8766 .free_client = nfs4_free_client,
1179acc6
BS		 8767 .create_server = nfs4_create_server,
8768 .clone_server = nfs_clone_server,
1da177e4
LT		 8769};
8770
64c2ce8b
AK		 8771static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8772 .prefix = XATTR_NAME_NFSV4_ACL,
8773 .list = nfs4_xattr_list_nfs4_acl,
8774 .get = nfs4_xattr_get_nfs4_acl,
8775 .set = nfs4_xattr_set_nfs4_acl,
8776};
8777
8778const struct xattr_handler *nfs4_xattr_handlers[] = {
8779 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8780#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8781 &nfs4_xattr_nfs4_label_handler,
8782#endif
64c2ce8b
AK		 8783 NULL
8784};
8785
1da177e4
LT		 8786/*
8787 * Local variables:
8788 * c-basic-offset: 8
8789 * End:
8790 */
Linux 6.x block layer and io_uring tree(s)