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NFSv4.1/pnfs: Fix a close/delegreturn hang when return-on-close is set
[linux-2.6-block.git] / fs / nfs / nfs4proc.c
CommitLineData
1da177e4
LT		 1/*
2 * fs/nfs/nfs4proc.c
3 *
4 * Client-side procedure declarations for NFSv4.
5 *
6 * Copyright (c) 2002 The Regents of the University of Michigan.
7 * All rights reserved.
8 *
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
11 *
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
14 * are met:
15 *
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
24 *
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
36 */
37
38#include <linux/mm.h>
1da177e4
LT		 39#include <linux/delay.h>
40#include <linux/errno.h>
feaff8e5 41#include <linux/file.h>
1da177e4 42#include <linux/string.h>
652f89f6
TM		 43#include <linux/ratelimit.h>
44#include <linux/printk.h>
5a0e3ad6 45#include <linux/slab.h>
1da177e4
LT		 46#include <linux/sunrpc/clnt.h>
47#include <linux/nfs.h>
48#include <linux/nfs4.h>
49#include <linux/nfs_fs.h>
50#include <linux/nfs_page.h>
9b7160c5 51#include <linux/nfs_mount.h>
1da177e4 52#include <linux/namei.h>
02a913a7 53#include <linux/mount.h>
99fe60d0 54#include <linux/module.h>
64c2ce8b 55#include <linux/xattr.h>
c7a360b0 56#include <linux/utsname.h>
d310310c 57#include <linux/freezer.h>
1da177e4 58
4ce79717 59#include "nfs4_fs.h"
1da177e4 60#include "delegation.h"
101070ca 61#include "internal.h"
006ea73e 62#include "iostat.h"
fc931582 63#include "callback.h"
b1f69b75 64#include "pnfs.h"
f092075d 65#include "netns.h"
40c64c26 66#include "nfs4idmap.h"
73e39aaa 67#include "nfs4session.h"
de242c0b 68#include "fscache.h"
1da177e4 69
c6d01c6f
TM		 70#include "nfs4trace.h"
71
1da177e4
LT		 72#define NFSDBG_FACILITY NFSDBG_PROC
73
2066fe89 74#define NFS4_POLL_RETRY_MIN (HZ/10)
1da177e4
LT		 75#define NFS4_POLL_RETRY_MAX (15*HZ)
76
cdd4e68b 77struct nfs4_opendata;
864472e9 78static int _nfs4_proc_open(struct nfs4_opendata *data);
b257957e 79static int _nfs4_recover_proc_open(struct nfs4_opendata *data);
1da177e4 80static int nfs4_do_fsinfo(struct nfs_server *, struct nfs_fh *, struct nfs_fsinfo *);
8478eaa1 81static int nfs4_async_handle_error(struct rpc_task *, const struct nfs_server *, struct nfs4_state *, long *);
81934ddb 82static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr);
1775fd3e
DQ		 83static int nfs4_proc_getattr(struct nfs_server *, struct nfs_fh *, struct nfs_fattr *, struct nfs4_label *label);
84static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fattr *fattr, struct nfs4_label *label);
0ab64e0e
TM		 85static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
86 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 87 struct nfs4_state *state, struct nfs4_label *ilabel,
88 struct nfs4_label *olabel);
f062eb6c 89#ifdef CONFIG_NFS_V4_1
ab7cb0df
TM		 90static int nfs41_test_stateid(struct nfs_server *, nfs4_stateid *,
91 struct rpc_cred *);
92static int nfs41_free_stateid(struct nfs_server *, nfs4_stateid *,
93 struct rpc_cred *);
f062eb6c 94#endif
aa9c2669
DQ		 95
96#ifdef CONFIG_NFS_V4_SECURITY_LABEL
97static inline struct nfs4_label *
98nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
99 struct iattr *sattr, struct nfs4_label *label)
100{
101 int err;
102
103 if (label == NULL)
104 return NULL;
105
106 if (nfs_server_capable(dir, NFS_CAP_SECURITY_LABEL) == 0)
107 return NULL;
108
aa9c2669
DQ		 109 err = security_dentry_init_security(dentry, sattr->ia_mode,
110 &dentry->d_name, (void **)&label->label, &label->len);
111 if (err == 0)
112 return label;
113
114 return NULL;
115}
116static inline void
117nfs4_label_release_security(struct nfs4_label *label)
118{
119 if (label)
120 security_release_secctx(label->label, label->len);
121}
122static inline u32 *nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
123{
124 if (label)
125 return server->attr_bitmask;
126
127 return server->attr_bitmask_nl;
128}
129#else
130static inline struct nfs4_label *
131nfs4_label_init_security(struct inode *dir, struct dentry *dentry,
132 struct iattr *sattr, struct nfs4_label *l)
133{ return NULL; }
134static inline void
135nfs4_label_release_security(struct nfs4_label *label)
136{ return; }
137static inline u32 *
138nfs4_bitmask(struct nfs_server *server, struct nfs4_label *label)
139{ return server->attr_bitmask; }
140#endif
141
1da177e4 142/* Prevent leaks of NFSv4 errors into userland */
46f72f57 143static int nfs4_map_errors(int err)
1da177e4 144{
52567b03
TM		 145 if (err >= -1000)
146 return err;
147 switch (err) {
148 case -NFS4ERR_RESOURCE:
30005121
WAA		 149 case -NFS4ERR_LAYOUTTRYLATER:
150 case -NFS4ERR_RECALLCONFLICT:
52567b03 151 return -EREMOTEIO;
7ebb9315 152 case -NFS4ERR_WRONGSEC:
8897538e 153 case -NFS4ERR_WRONG_CRED:
7ebb9315 154 return -EPERM;
3ddeb7c5
TM		 155 case -NFS4ERR_BADOWNER:
156 case -NFS4ERR_BADNAME:
157 return -EINVAL;
fb13bfa7
TM		 158 case -NFS4ERR_SHARE_DENIED:
159 return -EACCES;
f25efd85
SD		 160 case -NFS4ERR_MINOR_VERS_MISMATCH:
161 return -EPROTONOSUPPORT;
6e3cf241
TM		 162 case -NFS4ERR_FILE_OPEN:
163 return -EBUSY;
52567b03 164 default:
1da177e4 165 dprintk("%s could not handle NFSv4 error %d\n",
3110ff80 166 __func__, -err);
52567b03 167 break;
1da177e4 168 }
52567b03 169 return -EIO;
1da177e4
LT		 170}
171
172/*
173 * This is our standard bitmap for GETATTR requests.
174 */
1549210f 175const u32 nfs4_fattr_bitmap[3] = {
1da177e4
LT		 176 FATTR4_WORD0_TYPE
177 | FATTR4_WORD0_CHANGE
178 | FATTR4_WORD0_SIZE
179 | FATTR4_WORD0_FSID
180 | FATTR4_WORD0_FILEID,
181 FATTR4_WORD1_MODE
182 | FATTR4_WORD1_NUMLINKS
183 | FATTR4_WORD1_OWNER
184 | FATTR4_WORD1_OWNER_GROUP
185 | FATTR4_WORD1_RAWDEV
186 | FATTR4_WORD1_SPACE_USED
187 | FATTR4_WORD1_TIME_ACCESS
188 | FATTR4_WORD1_TIME_METADATA
ea96d1ec
AS		 189 | FATTR4_WORD1_TIME_MODIFY
190 | FATTR4_WORD1_MOUNTED_ON_FILEID,
aa9c2669
DQ		 191#ifdef CONFIG_NFS_V4_SECURITY_LABEL
192 FATTR4_WORD2_SECURITY_LABEL
193#endif
1da177e4
LT		 194};
195
1549210f
TM		 196static const u32 nfs4_pnfs_open_bitmap[3] = {
197 FATTR4_WORD0_TYPE
198 | FATTR4_WORD0_CHANGE
199 | FATTR4_WORD0_SIZE
200 | FATTR4_WORD0_FSID
201 | FATTR4_WORD0_FILEID,
202 FATTR4_WORD1_MODE
203 | FATTR4_WORD1_NUMLINKS
204 | FATTR4_WORD1_OWNER
205 | FATTR4_WORD1_OWNER_GROUP
206 | FATTR4_WORD1_RAWDEV
207 | FATTR4_WORD1_SPACE_USED
208 | FATTR4_WORD1_TIME_ACCESS
209 | FATTR4_WORD1_TIME_METADATA
210 | FATTR4_WORD1_TIME_MODIFY,
211 FATTR4_WORD2_MDSTHRESHOLD
212};
213
e23008ec
AA		 214static const u32 nfs4_open_noattr_bitmap[3] = {
215 FATTR4_WORD0_TYPE
216 | FATTR4_WORD0_CHANGE
217 | FATTR4_WORD0_FILEID,
218};
219
a09df2ca 220const u32 nfs4_statfs_bitmap[3] = {
1da177e4
LT		 221 FATTR4_WORD0_FILES_AVAIL
222 | FATTR4_WORD0_FILES_FREE
223 | FATTR4_WORD0_FILES_TOTAL,
224 FATTR4_WORD1_SPACE_AVAIL
225 | FATTR4_WORD1_SPACE_FREE
226 | FATTR4_WORD1_SPACE_TOTAL
227};
228
a09df2ca 229const u32 nfs4_pathconf_bitmap[3] = {
1da177e4
LT		 230 FATTR4_WORD0_MAXLINK
231 | FATTR4_WORD0_MAXNAME,
232 0
233};
234
dae100c2 235const u32 nfs4_fsinfo_bitmap[3] = { FATTR4_WORD0_MAXFILESIZE
1da177e4
LT		 236 | FATTR4_WORD0_MAXREAD
237 | FATTR4_WORD0_MAXWRITE
238 | FATTR4_WORD0_LEASE_TIME,
55b6e774 239 FATTR4_WORD1_TIME_DELTA
dae100c2
FI		 240 | FATTR4_WORD1_FS_LAYOUT_TYPES,
241 FATTR4_WORD2_LAYOUT_BLKSIZE
1da177e4
LT		 242};
243
a09df2ca 244const u32 nfs4_fs_locations_bitmap[3] = {
830b8e33
MN		 245 FATTR4_WORD0_TYPE
246 | FATTR4_WORD0_CHANGE
247 | FATTR4_WORD0_SIZE
248 | FATTR4_WORD0_FSID
249 | FATTR4_WORD0_FILEID
250 | FATTR4_WORD0_FS_LOCATIONS,
251 FATTR4_WORD1_MODE
252 | FATTR4_WORD1_NUMLINKS
253 | FATTR4_WORD1_OWNER
254 | FATTR4_WORD1_OWNER_GROUP
255 | FATTR4_WORD1_RAWDEV
256 | FATTR4_WORD1_SPACE_USED
257 | FATTR4_WORD1_TIME_ACCESS
258 | FATTR4_WORD1_TIME_METADATA
259 | FATTR4_WORD1_TIME_MODIFY
a09df2ca 260 | FATTR4_WORD1_MOUNTED_ON_FILEID,
830b8e33
MN		 261};
262
bc4785cd 263static void nfs4_setup_readdir(u64 cookie, __be32 *verifier, struct dentry *dentry,
1da177e4
LT		 264 struct nfs4_readdir_arg *readdir)
265{
0dbb4c67 266 __be32 *start, *p;
1da177e4 267
1da177e4 268 if (cookie > 2) {
b7ef1956 269 readdir->cookie = cookie;
1da177e4
LT		 270 memcpy(&readdir->verifier, verifier, sizeof(readdir->verifier));
271 return;
272 }
273
274 readdir->cookie = 0;
275 memset(&readdir->verifier, 0, sizeof(readdir->verifier));
276 if (cookie == 2)
277 return;
278
279 /*
280 * NFSv4 servers do not return entries for '.' and '..'
281 * Therefore, we fake these entries here. We let '.'
282 * have cookie 0 and '..' have cookie 1. Note that
283 * when talking to the server, we always send cookie 0
284 * instead of 1 or 2.
285 */
2b86ce2d 286 start = p = kmap_atomic(*readdir->pages);
1da177e4
LT		 287
288 if (cookie == 0) {
289 *p++ = xdr_one; /* next */
290 *p++ = xdr_zero; /* cookie, first word */
291 *p++ = xdr_one; /* cookie, second word */
292 *p++ = xdr_one; /* entry len */
293 memcpy(p, ".\0\0\0", 4); /* entry */
294 p++;
295 *p++ = xdr_one; /* bitmap length */
296 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
297 *p++ = htonl(8); /* attribute buffer length */
2b0143b5 298 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry)));
1da177e4
LT		 299 }
300
301 *p++ = xdr_one; /* next */
302 *p++ = xdr_zero; /* cookie, first word */
303 *p++ = xdr_two; /* cookie, second word */
304 *p++ = xdr_two; /* entry len */
305 memcpy(p, "..\0\0", 4); /* entry */
306 p++;
307 *p++ = xdr_one; /* bitmap length */
308 *p++ = htonl(FATTR4_WORD0_FILEID); /* bitmap */
309 *p++ = htonl(8); /* attribute buffer length */
2b0143b5 310 p = xdr_encode_hyper(p, NFS_FILEID(d_inode(dentry->d_parent)));
1da177e4
LT		 311
312 readdir->pgbase = (char *)p - (char *)start;
313 readdir->count -= readdir->pgbase;
2b86ce2d 314 kunmap_atomic(start);
1da177e4
LT		 315}
316
8478eaa1
N		 317static long nfs4_update_delay(long *timeout)
318{
319 long ret;
320 if (!timeout)
321 return NFS4_POLL_RETRY_MAX;
322 if (*timeout <= 0)
323 *timeout = NFS4_POLL_RETRY_MIN;
324 if (*timeout > NFS4_POLL_RETRY_MAX)
325 *timeout = NFS4_POLL_RETRY_MAX;
326 ret = *timeout;
327 *timeout <<= 1;
328 return ret;
329}
330
65de872e
TM		 331static int nfs4_delay(struct rpc_clnt *clnt, long *timeout)
332{
333 int res = 0;
334
335 might_sleep();
336
8478eaa1
N		 337 freezable_schedule_timeout_killable_unsafe(
338 nfs4_update_delay(timeout));
65de872e
TM		 339 if (fatal_signal_pending(current))
340 res = -ERESTARTSYS;
65de872e
TM		 341 return res;
342}
343
344/* This is the error handling routine for processes that are allowed
345 * to sleep.
346 */
f4ac1674 347int nfs4_handle_exception(struct nfs_server *server, int errorcode, struct nfs4_exception *exception)
65de872e
TM		 348{
349 struct nfs_client *clp = server->nfs_client;
9e33bed5 350 struct nfs4_state *state = exception->state;
3114ea7a 351 struct inode *inode = exception->inode;
65de872e
TM		 352 int ret = errorcode;
353
354 exception->retry = 0;
355 switch(errorcode) {
356 case 0:
357 return 0;
3114ea7a 358 case -NFS4ERR_OPENMODE:
5ba12443
TM		 359 case -NFS4ERR_DELEG_REVOKED:
360 case -NFS4ERR_ADMIN_REVOKED:
361 case -NFS4ERR_BAD_STATEID:
011e2a7f 362 if (inode && nfs4_have_delegation(inode, FMODE_READ)) {
57ec14c5 363 nfs4_inode_return_delegation(inode);
3114ea7a
TM		 364 exception->retry = 1;
365 return 0;
366 }
367 if (state == NULL)
368 break;
5d422301
TM		 369 ret = nfs4_schedule_stateid_recovery(server, state);
370 if (ret < 0)
371 break;
3114ea7a 372 goto wait_on_recovery;
0ced63d1 373 case -NFS4ERR_EXPIRED:
5d422301
TM		 374 if (state != NULL) {
375 ret = nfs4_schedule_stateid_recovery(server, state);
376 if (ret < 0)
377 break;
378 }
65de872e 379 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 380 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 381 nfs4_schedule_lease_recovery(clp);
382 goto wait_on_recovery;
519ae255
CL		 383 case -NFS4ERR_MOVED:
384 ret = nfs4_schedule_migration_recovery(server);
385 if (ret < 0)
386 break;
387 goto wait_on_recovery;
8ef2f8d4
CL		 388 case -NFS4ERR_LEASE_MOVED:
389 nfs4_schedule_lease_moved_recovery(clp);
390 goto wait_on_recovery;
03391693 391#if defined(CONFIG_NFS_V4_1)
4745e315
AA		 392 case -NFS4ERR_BADSESSION:
393 case -NFS4ERR_BADSLOT:
394 case -NFS4ERR_BAD_HIGH_SLOT:
395 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
396 case -NFS4ERR_DEADSESSION:
397 case -NFS4ERR_SEQ_FALSE_RETRY:
398 case -NFS4ERR_SEQ_MISORDERED:
399 dprintk("%s ERROR: %d Reset session\n", __func__,
400 errorcode);
9f594791 401 nfs4_schedule_session_recovery(clp->cl_session, errorcode);
399f11c3 402 goto wait_on_recovery;
03391693 403#endif /* defined(CONFIG_NFS_V4_1) */
65de872e 404 case -NFS4ERR_FILE_OPEN:
44ed3556
N		 405 if (exception->timeout > HZ) {
406 /* We have retried a decent amount, time to
407 * fail
408 */
409 ret = -EBUSY;
410 break;
411 }
65de872e
TM		 412 case -NFS4ERR_GRACE:
413 case -NFS4ERR_DELAY:
414 ret = nfs4_delay(server->client, &exception->timeout);
415 if (ret != 0)
416 break;
a8a4ae3a 417 case -NFS4ERR_RETRY_UNCACHED_REP:
65de872e
TM		 418 case -NFS4ERR_OLD_STATEID:
419 exception->retry = 1;
b064eca2
TM		 420 break;
421 case -NFS4ERR_BADOWNER:
422 /* The following works around a Linux server bug! */
423 case -NFS4ERR_BADNAME:
424 if (server->caps & NFS_CAP_UIDGID_NOMAP) {
425 server->caps &= ~NFS_CAP_UIDGID_NOMAP;
426 exception->retry = 1;
427 printk(KERN_WARNING "NFS: v4 server %s "
428 "does not accept raw "
429 "uid/gids. "
430 "Reenabling the idmapper.\n",
431 server->nfs_client->cl_hostname);
432 }
65de872e
TM		 433 }
434 /* We failed to handle the error */
435 return nfs4_map_errors(ret);
0400a6b0 436wait_on_recovery:
a2c0b9e2 437 ret = nfs4_wait_clnt_recover(clp);
519ae255
CL		 438 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
439 return -EIO;
a2c0b9e2
TM		 440 if (ret == 0)
441 exception->retry = 1;
442 return ret;
65de872e
TM		 443}
444
a5250def
WAA		 445/*
446 * Return 'true' if 'clp' is using an rpc_client that is integrity protected
447 * or 'false' otherwise.
448 */
449static bool _nfs4_is_integrity_protected(struct nfs_client *clp)
450{
451 rpc_authflavor_t flavor = clp->cl_rpcclient->cl_auth->au_flavor;
452
453 if (flavor == RPC_AUTH_GSS_KRB5I ||
454 flavor == RPC_AUTH_GSS_KRB5P)
455 return true;
456
457 return false;
458}
65de872e 459
452e9352 460static void do_renew_lease(struct nfs_client *clp, unsigned long timestamp)
1da177e4 461{
1da177e4
LT		 462 spin_lock(&clp->cl_lock);
463 if (time_before(clp->cl_last_renewal,timestamp))
464 clp->cl_last_renewal = timestamp;
465 spin_unlock(&clp->cl_lock);
466}
467
452e9352
TM		 468static void renew_lease(const struct nfs_server *server, unsigned long timestamp)
469{
be824167
TM		 470 struct nfs_client *clp = server->nfs_client;
471
472 if (!nfs4_has_session(clp))
473 do_renew_lease(clp, timestamp);
452e9352
TM		 474}
475
2a3eb2b9
CL		 476struct nfs4_call_sync_data {
477 const struct nfs_server *seq_server;
478 struct nfs4_sequence_args *seq_args;
479 struct nfs4_sequence_res *seq_res;
480};
481
be3a5d23
TM		 482void nfs4_init_sequence(struct nfs4_sequence_args *args,
483 struct nfs4_sequence_res *res, int cache_reply)
a9c92d6b
CL		 484{
485 args->sa_slot = NULL;
486 args->sa_cache_this = cache_reply;
487 args->sa_privileged = 0;
488
489 res->sr_slot = NULL;
490}
491
492static void nfs4_set_sequence_privileged(struct nfs4_sequence_args *args)
493{
494 args->sa_privileged = 1;
495}
496
cb04ad2a
PT		 497int nfs40_setup_sequence(struct nfs4_slot_table *tbl,
498 struct nfs4_sequence_args *args,
499 struct nfs4_sequence_res *res,
500 struct rpc_task *task)
3bd2384a 501{
3bd2384a
CL		 502 struct nfs4_slot *slot;
503
504 /* slot already allocated? */
505 if (res->sr_slot != NULL)
506 goto out_start;
507
508 spin_lock(&tbl->slot_tbl_lock);
509 if (nfs4_slot_tbl_draining(tbl) && !args->sa_privileged)
510 goto out_sleep;
511
512 slot = nfs4_alloc_slot(tbl);
513 if (IS_ERR(slot)) {
514 if (slot == ERR_PTR(-ENOMEM))
515 task->tk_timeout = HZ >> 2;
516 goto out_sleep;
517 }
518 spin_unlock(&tbl->slot_tbl_lock);
519
520 args->sa_slot = slot;
521 res->sr_slot = slot;
522
523out_start:
524 rpc_call_start(task);
525 return 0;
526
527out_sleep:
528 if (args->sa_privileged)
529 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
530 NULL, RPC_PRIORITY_PRIVILEGED);
531 else
532 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
533 spin_unlock(&tbl->slot_tbl_lock);
534 return -EAGAIN;
535}
cb04ad2a 536EXPORT_SYMBOL_GPL(nfs40_setup_sequence);
3bd2384a
CL		 537
538static int nfs40_sequence_done(struct rpc_task *task,
539 struct nfs4_sequence_res *res)
540{
541 struct nfs4_slot *slot = res->sr_slot;
542 struct nfs4_slot_table *tbl;
543
cab92c19 544 if (slot == NULL)
3bd2384a
CL		 545 goto out;
546
547 tbl = slot->table;
548 spin_lock(&tbl->slot_tbl_lock);
549 if (!nfs41_wake_and_assign_slot(tbl, slot))
550 nfs4_free_slot(tbl, slot);
551 spin_unlock(&tbl->slot_tbl_lock);
552
553 res->sr_slot = NULL;
554out:
555 return 1;
556}
557
cccef3b9
AA		 558#if defined(CONFIG_NFS_V4_1)
559
d185a334 560static void nfs41_sequence_free_slot(struct nfs4_sequence_res *res)
13615871 561{
e3725ec0 562 struct nfs4_session *session;
13615871 563 struct nfs4_slot_table *tbl;
a13ce7c6 564 struct nfs4_slot *slot = res->sr_slot;
c10e4498 565 bool send_new_highest_used_slotid = false;
13615871 566
a13ce7c6 567 tbl = slot->table;
e3725ec0 568 session = tbl->session;
ea028ac9 569
35dc1d74 570 spin_lock(&tbl->slot_tbl_lock);
c10e4498
TM		 571 /* Be nice to the server: try to ensure that the last transmitted
572 * value for highest_user_slotid <= target_highest_slotid
573 */
574 if (tbl->highest_used_slotid > tbl->target_highest_slotid)
575 send_new_highest_used_slotid = true;
576
a13ce7c6 577 if (nfs41_wake_and_assign_slot(tbl, slot)) {
b75ad4cd
TM		 578 send_new_highest_used_slotid = false;
579 goto out_unlock;
580 }
a13ce7c6 581 nfs4_free_slot(tbl, slot);
c10e4498
TM		 582
583 if (tbl->highest_used_slotid != NFS4_NO_SLOT)
584 send_new_highest_used_slotid = false;
b75ad4cd 585out_unlock:
35dc1d74 586 spin_unlock(&tbl->slot_tbl_lock);
dfb4f309 587 res->sr_slot = NULL;
c10e4498 588 if (send_new_highest_used_slotid)
3f10a6af 589 nfs41_notify_server(session->clp);
13615871
AA		 590}
591
f9c96fcc 592int nfs41_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
b0df806c 593{
e3725ec0 594 struct nfs4_session *session;
a13ce7c6 595 struct nfs4_slot *slot = res->sr_slot;
14516c3a 596 struct nfs_client *clp;
ac20d163 597 bool interrupted = false;
85563073 598 int ret = 1;
b0df806c 599
a13ce7c6
TM		 600 if (slot == NULL)
601 goto out_noaction;
468f8613
BS		 602 /* don't increment the sequence number if the task wasn't sent */
603 if (!RPC_WAS_SENT(task))
b0df806c
AA		 604 goto out;
605
e3725ec0 606 session = slot->table->session;
933602e3 607
ac20d163
TM		 608 if (slot->interrupted) {
609 slot->interrupted = 0;
610 interrupted = true;
611 }
612
2f92ae34 613 trace_nfs4_sequence_done(session, res);
691daf3b 614 /* Check the SEQUENCE operation status */
14516c3a
TM		 615 switch (res->sr_status) {
616 case 0:
b0df806c 617 /* Update the slot's sequence and clientid lease timer */
933602e3 618 ++slot->seq_nr;
e3725ec0 619 clp = session->clp;
8e63b6a8 620 do_renew_lease(clp, res->sr_timestamp);
0629e370 621 /* Check sequence flags */
b15c7cdd 622 nfs41_handle_sequence_flag_errors(clp, res->sr_status_flags);
464ee9f9 623 nfs41_update_target_slotid(slot->table, slot, res);
14516c3a 624 break;
ac20d163
TM		 625 case 1:
626 /*
627 * sr_status remains 1 if an RPC level error occurred.
628 * The server may or may not have processed the sequence
629 * operation..
630 * Mark the slot as having hosted an interrupted RPC call.
631 */
632 slot->interrupted = 1;
633 goto out;
14516c3a
TM		 634 case -NFS4ERR_DELAY:
635 /* The server detected a resend of the RPC call and
636 * returned NFS4ERR_DELAY as per Section 2.10.6.2
637 * of RFC5661.
638 */
df2fabff 639 dprintk("%s: slot=%u seq=%u: Operation in progress\n",
dfb4f309 640 __func__,
df2fabff 641 slot->slot_nr,
933602e3 642 slot->seq_nr);
14516c3a 643 goto out_retry;
85563073
TM		 644 case -NFS4ERR_BADSLOT:
645 /*
646 * The slot id we used was probably retired. Try again
647 * using a different slot id.
648 */
e8794440
TM		 649 goto retry_nowait;
650 case -NFS4ERR_SEQ_MISORDERED:
ac20d163
TM		 651 /*
652 * Was the last operation on this sequence interrupted?
653 * If so, retry after bumping the sequence number.
654 */
655 if (interrupted) {
656 ++slot->seq_nr;
657 goto retry_nowait;
658 }
e8794440
TM		 659 /*
660 * Could this slot have been previously retired?
661 * If so, then the server may be expecting seq_nr = 1!
662 */
8e63b6a8
TM		 663 if (slot->seq_nr != 1) {
664 slot->seq_nr = 1;
665 goto retry_nowait;
666 }
667 break;
e8794440
TM		 668 case -NFS4ERR_SEQ_FALSE_RETRY:
669 ++slot->seq_nr;
670 goto retry_nowait;
14516c3a
TM		 671 default:
672 /* Just update the slot sequence no. */
933602e3 673 ++slot->seq_nr;
b0df806c
AA		 674 }
675out:
676 /* The session may be reset by one of the error handlers. */
677 dprintk("%s: Error %d free the slot \n", __func__, res->sr_status);
d185a334 678 nfs41_sequence_free_slot(res);
a13ce7c6 679out_noaction:
85563073 680 return ret;
e8794440
TM		 681retry_nowait:
682 if (rpc_restart_call_prepare(task)) {
683 task->tk_status = 0;
684 ret = 0;
685 }
686 goto out;
14516c3a 687out_retry:
d05dd4e9 688 if (!rpc_restart_call(task))
14516c3a
TM		 689 goto out;
690 rpc_delay(task, NFS4_POLL_RETRY_MAX);
691 return 0;
b0df806c 692}
f9c96fcc 693EXPORT_SYMBOL_GPL(nfs41_sequence_done);
b0df806c 694
2c4b131d 695int nfs4_sequence_done(struct rpc_task *task, struct nfs4_sequence_res *res)
df896455 696{
e3725ec0 697 if (res->sr_slot == NULL)
14516c3a 698 return 1;
3bd2384a
CL		 699 if (!res->sr_slot->table->session)
700 return nfs40_sequence_done(task, res);
14516c3a 701 return nfs41_sequence_done(task, res);
df896455 702}
2c4b131d 703EXPORT_SYMBOL_GPL(nfs4_sequence_done);
df896455 704
dc70d7b3 705int nfs41_setup_sequence(struct nfs4_session *session,
ce5039c1
AA		 706 struct nfs4_sequence_args *args,
707 struct nfs4_sequence_res *res,
ce5039c1
AA		 708 struct rpc_task *task)
709{
fbcd4abc
AA		 710 struct nfs4_slot *slot;
711 struct nfs4_slot_table *tbl;
fbcd4abc
AA		 712
713 dprintk("--> %s\n", __func__);
ce5039c1 714 /* slot already allocated? */
dfb4f309 715 if (res->sr_slot != NULL)
d9afbd1b 716 goto out_success;
ce5039c1 717
fbcd4abc
AA		 718 tbl = &session->fc_slot_table;
719
69d206b5
TM		 720 task->tk_timeout = 0;
721
fbcd4abc 722 spin_lock(&tbl->slot_tbl_lock);
774d5f14 723 if (test_bit(NFS4_SLOT_TBL_DRAINING, &tbl->slot_tbl_state) &&
8fe72bac 724 !args->sa_privileged) {
0b1c8fc4 725 /* The state manager will wait until the slot table is empty */
0b1c8fc4 726 dprintk("%s session is draining\n", __func__);
7b939a3f 727 goto out_sleep;
689cf5c1
AB		 728 }
729
2dc03b7f 730 slot = nfs4_alloc_slot(tbl);
69d206b5
TM		 731 if (IS_ERR(slot)) {
732 /* If out of memory, try again in 1/4 second */
733 if (slot == ERR_PTR(-ENOMEM))
734 task->tk_timeout = HZ >> 2;
fbcd4abc 735 dprintk("<-- %s: no free slots\n", __func__);
7b939a3f 736 goto out_sleep;
fbcd4abc
AA		 737 }
738 spin_unlock(&tbl->slot_tbl_lock);
739
2b2fa717 740 args->sa_slot = slot;
fbcd4abc 741
e8d92382 742 dprintk("<-- %s slotid=%u seqid=%u\n", __func__,
2dc03b7f 743 slot->slot_nr, slot->seq_nr);
fbcd4abc 744
dfb4f309 745 res->sr_slot = slot;
8e63b6a8 746 res->sr_timestamp = jiffies;
2a6e26cd 747 res->sr_status_flags = 0;
fbcd4abc
AA		 748 /*
749 * sr_status is only set in decode_sequence, and so will remain
750 * set to 1 if an rpc level failure occurs.
751 */
752 res->sr_status = 1;
2f92ae34 753 trace_nfs4_setup_sequence(session, args);
d9afbd1b
TM		 754out_success:
755 rpc_call_start(task);
ce5039c1 756 return 0;
7b939a3f 757out_sleep:
8fe72bac
TM		 758 /* Privileged tasks are queued with top priority */
759 if (args->sa_privileged)
1e1093c7
TM		 760 rpc_sleep_on_priority(&tbl->slot_tbl_waitq, task,
761 NULL, RPC_PRIORITY_PRIVILEGED);
762 else
763 rpc_sleep_on(&tbl->slot_tbl_waitq, task, NULL);
7b939a3f
TM		 764 spin_unlock(&tbl->slot_tbl_lock);
765 return -EAGAIN;
ce5039c1 766}
dc70d7b3 767EXPORT_SYMBOL_GPL(nfs41_setup_sequence);
ce5039c1 768
5a580e0a
CL		 769static int nfs4_setup_sequence(const struct nfs_server *server,
770 struct nfs4_sequence_args *args,
771 struct nfs4_sequence_res *res,
772 struct rpc_task *task)
ce5039c1 773{
035168ab 774 struct nfs4_session *session = nfs4_get_session(server);
ce5039c1
AA		 775 int ret = 0;
776
3bd2384a 777 if (!session)
cb04ad2a
PT		 778 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
779 args, res, task);
035168ab 780
e8d92382 781 dprintk("--> %s clp %p session %p sr_slot %u\n",
dfb4f309 782 __func__, session->clp, session, res->sr_slot ?
e8d92382 783 res->sr_slot->slot_nr : NFS4_NO_SLOT);
ce5039c1 784
9d12b216 785 ret = nfs41_setup_sequence(session, args, res, task);
3bd2384a 786
ce5039c1
AA		 787 dprintk("<-- %s status=%d\n", __func__, ret);
788 return ret;
789}
790
ce5039c1
AA		 791static void nfs41_call_sync_prepare(struct rpc_task *task, void *calldata)
792{
2a3eb2b9 793 struct nfs4_call_sync_data *data = calldata;
6ba7db34 794 struct nfs4_session *session = nfs4_get_session(data->seq_server);
ce5039c1 795
035168ab
TM		 796 dprintk("--> %s data->seq_server %p\n", __func__, data->seq_server);
797
d9afbd1b 798 nfs41_setup_sequence(session, data->seq_args, data->seq_res, task);
ce5039c1
AA		 799}
800
69ab40c4
AA		 801static void nfs41_call_sync_done(struct rpc_task *task, void *calldata)
802{
2a3eb2b9 803 struct nfs4_call_sync_data *data = calldata;
69ab40c4 804
14516c3a 805 nfs41_sequence_done(task, data->seq_res);
69ab40c4
AA		 806}
807
17280175 808static const struct rpc_call_ops nfs41_call_sync_ops = {
ce5039c1 809 .rpc_call_prepare = nfs41_call_sync_prepare,
69ab40c4 810 .rpc_call_done = nfs41_call_sync_done,
ce5039c1
AA		 811};
812
3bd2384a
CL		 813#else /* !CONFIG_NFS_V4_1 */
814
9915ea7e
CL		 815static int nfs4_setup_sequence(const struct nfs_server *server,
816 struct nfs4_sequence_args *args,
817 struct nfs4_sequence_res *res,
818 struct rpc_task *task)
819{
cb04ad2a
PT		 820 return nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
821 args, res, task);
9915ea7e
CL		 822}
823
2c4b131d
PT		 824int nfs4_sequence_done(struct rpc_task *task,
825 struct nfs4_sequence_res *res)
9915ea7e 826{
3bd2384a 827 return nfs40_sequence_done(task, res);
9915ea7e 828}
2c4b131d 829EXPORT_SYMBOL_GPL(nfs4_sequence_done);
3bd2384a
CL		 830
831#endif /* !CONFIG_NFS_V4_1 */
9915ea7e
CL		 832
833static void nfs40_call_sync_prepare(struct rpc_task *task, void *calldata)
834{
835 struct nfs4_call_sync_data *data = calldata;
836 nfs4_setup_sequence(data->seq_server,
837 data->seq_args, data->seq_res, task);
838}
839
840static void nfs40_call_sync_done(struct rpc_task *task, void *calldata)
841{
842 struct nfs4_call_sync_data *data = calldata;
843 nfs4_sequence_done(task, data->seq_res);
844}
845
846static const struct rpc_call_ops nfs40_call_sync_ops = {
847 .rpc_call_prepare = nfs40_call_sync_prepare,
848 .rpc_call_done = nfs40_call_sync_done,
849};
850
7c513058
BS		 851static int nfs4_call_sync_sequence(struct rpc_clnt *clnt,
852 struct nfs_server *server,
ce5039c1
AA		 853 struct rpc_message *msg,
854 struct nfs4_sequence_args *args,
8fe72bac 855 struct nfs4_sequence_res *res)
ce5039c1
AA		 856{
857 int ret;
858 struct rpc_task *task;
9915ea7e 859 struct nfs_client *clp = server->nfs_client;
2a3eb2b9 860 struct nfs4_call_sync_data data = {
035168ab 861 .seq_server = server,
ce5039c1
AA		 862 .seq_args = args,
863 .seq_res = res,
ce5039c1
AA		 864 };
865 struct rpc_task_setup task_setup = {
7c513058 866 .rpc_client = clnt,
ce5039c1 867 .rpc_message = msg,
9915ea7e 868 .callback_ops = clp->cl_mvops->call_sync_ops,
ce5039c1
AA		 869 .callback_data = &data
870 };
871
ce5039c1
AA		 872 task = rpc_run_task(&task_setup);
873 if (IS_ERR(task))
874 ret = PTR_ERR(task);
875 else {
876 ret = task->tk_status;
877 rpc_put_task(task);
878 }
879 return ret;
880}
881
7c513058
BS		 882int nfs4_call_sync(struct rpc_clnt *clnt,
883 struct nfs_server *server,
e73b83f2
BS		 884 struct rpc_message *msg,
885 struct nfs4_sequence_args *args,
886 struct nfs4_sequence_res *res,
887 int cache_reply)
888{
a9c92d6b 889 nfs4_init_sequence(args, res, cache_reply);
9915ea7e 890 return nfs4_call_sync_sequence(clnt, server, msg, args, res);
e73b83f2 891}
cccef3b9 892
38478b24 893static void update_changeattr(struct inode *dir, struct nfs4_change_info *cinfo)
1da177e4 894{
38478b24 895 struct nfs_inode *nfsi = NFS_I(dir);
1da177e4 896
38478b24 897 spin_lock(&dir->i_lock);
359d7d1c 898 nfsi->cache_validity |= NFS_INO_INVALID_ATTR|NFS_INO_INVALID_DATA;
a9a4a87a 899 if (!cinfo->atomic || cinfo->before != dir->i_version)
bfc69a45 900 nfs_force_lookup_revalidate(dir);
a9a4a87a 901 dir->i_version = cinfo->after;
3235b403 902 nfsi->attr_gencount = nfs_inc_attr_generation_counter();
de242c0b 903 nfs_fscache_invalidate(dir);
38478b24 904 spin_unlock(&dir->i_lock);
1da177e4
LT		 905}
906
e56e0b78 907struct nfs4_opendata {
c6d00e63 908 struct kref kref;
e56e0b78
TM		 909 struct nfs_openargs o_arg;
910 struct nfs_openres o_res;
cdd4e68b
TM		 911 struct nfs_open_confirmargs c_arg;
912 struct nfs_open_confirmres c_res;
6926afd1
TM		 913 struct nfs4_string owner_name;
914 struct nfs4_string group_name;
a49c2691 915 struct nfs4_label *a_label;
e56e0b78 916 struct nfs_fattr f_attr;
1775fd3e 917 struct nfs4_label *f_label;
e56e0b78 918 struct dentry *dir;
82a2c1b7 919 struct dentry *dentry;
e56e0b78 920 struct nfs4_state_owner *owner;
aac00a8d 921 struct nfs4_state *state;
e56e0b78 922 struct iattr attrs;
26e976a8 923 unsigned long timestamp;
3e309914 924 unsigned int rpc_done : 1;
5bc2afc2 925 unsigned int file_created : 1;
bdeca1b7 926 unsigned int is_recover : 1;
24ac23ab
TM		 927 int rpc_status;
928 int cancelled;
e56e0b78
TM		 929};
930
49f9a0fa
TM		 931static bool nfs4_clear_cap_atomic_open_v1(struct nfs_server *server,
932 int err, struct nfs4_exception *exception)
933{
934 if (err != -EINVAL)
935 return false;
936 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
937 return false;
938 server->caps &= ~NFS_CAP_ATOMIC_OPEN_V1;
939 exception->retry = 1;
940 return true;
941}
942
6ae37339
TM		 943static u32
944nfs4_map_atomic_open_share(struct nfs_server *server,
945 fmode_t fmode, int openflags)
946{
947 u32 res = 0;
948
949 switch (fmode & (FMODE_READ | FMODE_WRITE)) {
950 case FMODE_READ:
951 res = NFS4_SHARE_ACCESS_READ;
952 break;
953 case FMODE_WRITE:
954 res = NFS4_SHARE_ACCESS_WRITE;
955 break;
956 case FMODE_READ|FMODE_WRITE:
957 res = NFS4_SHARE_ACCESS_BOTH;
958 }
959 if (!(server->caps & NFS_CAP_ATOMIC_OPEN_V1))
960 goto out;
961 /* Want no delegation if we're using O_DIRECT */
962 if (openflags & O_DIRECT)
963 res |= NFS4_SHARE_WANT_NO_DELEG;
964out:
965 return res;
966}
967
49f9a0fa
TM		 968static enum open_claim_type4
969nfs4_map_atomic_open_claim(struct nfs_server *server,
970 enum open_claim_type4 claim)
971{
972 if (server->caps & NFS_CAP_ATOMIC_OPEN_V1)
973 return claim;
974 switch (claim) {
975 default:
976 return claim;
977 case NFS4_OPEN_CLAIM_FH:
978 return NFS4_OPEN_CLAIM_NULL;
979 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
980 return NFS4_OPEN_CLAIM_DELEGATE_CUR;
981 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
982 return NFS4_OPEN_CLAIM_DELEGATE_PREV;
983 }
984}
2ced46c2
TM		 985
986static void nfs4_init_opendata_res(struct nfs4_opendata *p)
987{
988 p->o_res.f_attr = &p->f_attr;
1775fd3e 989 p->o_res.f_label = p->f_label;
c1d51931
TM		 990 p->o_res.seqid = p->o_arg.seqid;
991 p->c_res.seqid = p->c_arg.seqid;
2ced46c2 992 p->o_res.server = p->o_arg.server;
5f657530 993 p->o_res.access_request = p->o_arg.access;
2ced46c2 994 nfs_fattr_init(&p->f_attr);
6926afd1 995 nfs_fattr_init_names(&p->f_attr, &p->owner_name, &p->group_name);
2ced46c2
TM		 996}
997
82a2c1b7 998static struct nfs4_opendata *nfs4_opendata_alloc(struct dentry *dentry,
dc0b027d 999 struct nfs4_state_owner *sp, fmode_t fmode, int flags,
8535b2be 1000 const struct iattr *attrs,
1775fd3e 1001 struct nfs4_label *label,
4a1c0893 1002 enum open_claim_type4 claim,
8535b2be 1003 gfp_t gfp_mask)
e56e0b78 1004{
82a2c1b7 1005 struct dentry *parent = dget_parent(dentry);
2b0143b5 1006 struct inode *dir = d_inode(parent);
e56e0b78 1007 struct nfs_server *server = NFS_SERVER(dir);
63f5f796 1008 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
e56e0b78
TM		 1009 struct nfs4_opendata *p;
1010
8535b2be 1011 p = kzalloc(sizeof(*p), gfp_mask);
e56e0b78
TM		 1012 if (p == NULL)
1013 goto err;
14c43f76
DQ		 1014
1015 p->f_label = nfs4_label_alloc(server, gfp_mask);
1016 if (IS_ERR(p->f_label))
1017 goto err_free_p;
1018
a49c2691
KM		 1019 p->a_label = nfs4_label_alloc(server, gfp_mask);
1020 if (IS_ERR(p->a_label))
1021 goto err_free_f;
1022
63f5f796
TM		 1023 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
1024 p->o_arg.seqid = alloc_seqid(&sp->so_seqid, gfp_mask);
badc76dd 1025 if (IS_ERR(p->o_arg.seqid))
14c43f76 1026 goto err_free_label;
82a2c1b7
AV		 1027 nfs_sb_active(dentry->d_sb);
1028 p->dentry = dget(dentry);
e56e0b78
TM		 1029 p->dir = parent;
1030 p->owner = sp;
1031 atomic_inc(&sp->so_count);
dc0b027d
TM		 1032 p->o_arg.open_flags = flags;
1033 p->o_arg.fmode = fmode & (FMODE_READ|FMODE_WRITE);
6ae37339
TM		 1034 p->o_arg.share_access = nfs4_map_atomic_open_share(server,
1035 fmode, flags);
ae2bb032
WAA		 1036 /* don't put an ACCESS op in OPEN compound if O_EXCL, because ACCESS
1037 * will return permission denied for all bits until close */
1038 if (!(flags & O_EXCL)) {
1039 /* ask server to check for all possible rights as results
1040 * are cached */
1041 p->o_arg.access = NFS4_ACCESS_READ | NFS4_ACCESS_MODIFY |
1042 NFS4_ACCESS_EXTEND | NFS4_ACCESS_EXECUTE;
ae2bb032 1043 }
7539bbab 1044 p->o_arg.clientid = server->nfs_client->cl_clientid;
95b72eb0
TM		 1045 p->o_arg.id.create_time = ktime_to_ns(sp->so_seqid.create_time);
1046 p->o_arg.id.uniquifier = sp->so_seqid.owner_id;
82a2c1b7 1047 p->o_arg.name = &dentry->d_name;
e56e0b78 1048 p->o_arg.server = server;
aa9c2669 1049 p->o_arg.bitmask = nfs4_bitmask(server, label);
1549210f 1050 p->o_arg.open_bitmap = &nfs4_fattr_bitmap[0];
a49c2691 1051 p->o_arg.label = nfs4_label_copy(p->a_label, label);
49f9a0fa
TM		 1052 p->o_arg.claim = nfs4_map_atomic_open_claim(server, claim);
1053 switch (p->o_arg.claim) {
4a1c0893
TM		 1054 case NFS4_OPEN_CLAIM_NULL:
1055 case NFS4_OPEN_CLAIM_DELEGATE_CUR:
1056 case NFS4_OPEN_CLAIM_DELEGATE_PREV:
1057 p->o_arg.fh = NFS_FH(dir);
1058 break;
1059 case NFS4_OPEN_CLAIM_PREVIOUS:
1060 case NFS4_OPEN_CLAIM_FH:
1061 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1062 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
2b0143b5 1063 p->o_arg.fh = NFS_FH(d_inode(dentry));
4a1c0893 1064 }
536e43d1 1065 if (attrs != NULL && attrs->ia_valid != 0) {
c281fa9c 1066 __u32 verf[2];
d77d76ff 1067
e56e0b78
TM		 1068 p->o_arg.u.attrs = &p->attrs;
1069 memcpy(&p->attrs, attrs, sizeof(p->attrs));
cd93710e
CL		 1070
1071 verf[0] = jiffies;
1072 verf[1] = current->pid;
1073 memcpy(p->o_arg.u.verifier.data, verf,
1074 sizeof(p->o_arg.u.verifier.data));
e56e0b78 1075 }
cdd4e68b
TM		 1076 p->c_arg.fh = &p->o_res.fh;
1077 p->c_arg.stateid = &p->o_res.stateid;
1078 p->c_arg.seqid = p->o_arg.seqid;
2ced46c2 1079 nfs4_init_opendata_res(p);
c6d00e63 1080 kref_init(&p->kref);
e56e0b78 1081 return p;
14c43f76
DQ		 1082
1083err_free_label:
a49c2691
KM		 1084 nfs4_label_free(p->a_label);
1085err_free_f:
14c43f76
DQ		 1086 nfs4_label_free(p->f_label);
1087err_free_p:
e56e0b78
TM		 1088 kfree(p);
1089err:
1090 dput(parent);
1091 return NULL;
1092}
1093
c6d00e63 1094static void nfs4_opendata_free(struct kref *kref)
e56e0b78 1095{
c6d00e63
TM		 1096 struct nfs4_opendata *p = container_of(kref,
1097 struct nfs4_opendata, kref);
82a2c1b7 1098 struct super_block *sb = p->dentry->d_sb;
c6d00e63
TM		 1099
1100 nfs_free_seqid(p->o_arg.seqid);
aac00a8d
TM		 1101 if (p->state != NULL)
1102 nfs4_put_open_state(p->state);
c6d00e63 1103 nfs4_put_state_owner(p->owner);
14c43f76 1104
a49c2691 1105 nfs4_label_free(p->a_label);
14c43f76
DQ		 1106 nfs4_label_free(p->f_label);
1107
c6d00e63 1108 dput(p->dir);
82a2c1b7
AV		 1109 dput(p->dentry);
1110 nfs_sb_deactive(sb);
6926afd1 1111 nfs_fattr_free_names(&p->f_attr);
e911b815 1112 kfree(p->f_attr.mdsthreshold);
c6d00e63
TM		 1113 kfree(p);
1114}
1115
1116static void nfs4_opendata_put(struct nfs4_opendata *p)
1117{
1118 if (p != NULL)
1119 kref_put(&p->kref, nfs4_opendata_free);
e56e0b78
TM		 1120}
1121
06f814a3
TM		 1122static int nfs4_wait_for_completion_rpc_task(struct rpc_task *task)
1123{
06f814a3
TM		 1124 int ret;
1125
06f814a3 1126 ret = rpc_wait_for_completion_task(task);
06f814a3
TM		 1127 return ret;
1128}
1129
dc0b027d 1130static int can_open_cached(struct nfs4_state *state, fmode_t mode, int open_mode)
6ee41268
TM		 1131{
1132 int ret = 0;
dc0b027d 1133
536e43d1 1134 if (open_mode & (O_EXCL|O_TRUNC))
dc0b027d
TM		 1135 goto out;
1136 switch (mode & (FMODE_READ|FMODE_WRITE)) {
6ee41268 1137 case FMODE_READ:
88069f77
TM		 1138 ret |= test_bit(NFS_O_RDONLY_STATE, &state->flags) != 0
1139 && state->n_rdonly != 0;
6ee41268
TM		 1140 break;
1141 case FMODE_WRITE:
88069f77
TM		 1142 ret |= test_bit(NFS_O_WRONLY_STATE, &state->flags) != 0
1143 && state->n_wronly != 0;
6ee41268
TM		 1144 break;
1145 case FMODE_READ|FMODE_WRITE:
88069f77
TM		 1146 ret |= test_bit(NFS_O_RDWR_STATE, &state->flags) != 0
1147 && state->n_rdwr != 0;
6ee41268 1148 }
dc0b027d 1149out:
6ee41268
TM		 1150 return ret;
1151}
1152
dc0b027d 1153static int can_open_delegated(struct nfs_delegation *delegation, fmode_t fmode)
aac00a8d 1154{
652f89f6
TM		 1155 if (delegation == NULL)
1156 return 0;
dc0b027d 1157 if ((delegation->type & fmode) != fmode)
aac00a8d 1158 return 0;
d25be546
TM		 1159 if (test_bit(NFS_DELEGATION_RETURNING, &delegation->flags))
1160 return 0;
b7391f44 1161 nfs_mark_delegation_referenced(delegation);
aac00a8d
TM		 1162 return 1;
1163}
1164
dc0b027d 1165static void update_open_stateflags(struct nfs4_state *state, fmode_t fmode)
e7616923 1166{
dc0b027d 1167 switch (fmode) {
e7616923
TM		 1168 case FMODE_WRITE:
1169 state->n_wronly++;
1170 break;
1171 case FMODE_READ:
1172 state->n_rdonly++;
1173 break;
1174 case FMODE_READ|FMODE_WRITE:
1175 state->n_rdwr++;
1176 }
dc0b027d 1177 nfs4_state_set_mode_locked(state, state->state | fmode);
003707c7
TM		 1178}
1179
4f14c194
TM		 1180static void nfs_test_and_clear_all_open_stateid(struct nfs4_state *state)
1181{
1182 struct nfs_client *clp = state->owner->so_server->nfs_client;
1183 bool need_recover = false;
1184
1185 if (test_and_clear_bit(NFS_O_RDONLY_STATE, &state->flags) && state->n_rdonly)
1186 need_recover = true;
1187 if (test_and_clear_bit(NFS_O_WRONLY_STATE, &state->flags) && state->n_wronly)
1188 need_recover = true;
1189 if (test_and_clear_bit(NFS_O_RDWR_STATE, &state->flags) && state->n_rdwr)
1190 need_recover = true;
1191 if (need_recover)
1192 nfs4_state_mark_reclaim_nograce(clp, state);
1193}
1194
e999e80e
TM		 1195static bool nfs_need_update_open_stateid(struct nfs4_state *state,
1196 nfs4_stateid *stateid)
1197{
1198 if (test_and_set_bit(NFS_OPEN_STATE, &state->flags) == 0)
1199 return true;
4f14c194
TM		 1200 if (!nfs4_stateid_match_other(stateid, &state->open_stateid)) {
1201 nfs_test_and_clear_all_open_stateid(state);
e999e80e 1202 return true;
4f14c194 1203 }
e999e80e
TM		 1204 if (nfs4_stateid_is_newer(stateid, &state->open_stateid))
1205 return true;
1206 return false;
1207}
1208
f95549cf
TM		 1209static void nfs_resync_open_stateid_locked(struct nfs4_state *state)
1210{
3c38cbe2
TM		 1211 if (!(state->n_wronly || state->n_rdonly || state->n_rdwr))
1212 return;
f95549cf
TM		 1213 if (state->n_wronly)
1214 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1215 if (state->n_rdonly)
1216 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1217 if (state->n_rdwr)
1218 set_bit(NFS_O_RDWR_STATE, &state->flags);
3c38cbe2 1219 set_bit(NFS_OPEN_STATE, &state->flags);
f95549cf
TM		 1220}
1221
226056c5
TM		 1222static void nfs_clear_open_stateid_locked(struct nfs4_state *state,
1223 nfs4_stateid *stateid, fmode_t fmode)
003707c7 1224{
226056c5
TM		 1225 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1226 switch (fmode & (FMODE_READ|FMODE_WRITE)) {
1227 case FMODE_WRITE:
1228 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1229 break;
1230 case FMODE_READ:
1231 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1232 break;
1233 case 0:
1234 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
1235 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1236 clear_bit(NFS_OPEN_STATE, &state->flags);
1237 }
1238 if (stateid == NULL)
1239 return;
f95549cf
TM		 1240 /* Handle races with OPEN */
1241 if (!nfs4_stateid_match_other(stateid, &state->open_stateid) ||
1242 !nfs4_stateid_is_newer(stateid, &state->open_stateid)) {
1243 nfs_resync_open_stateid_locked(state);
226056c5 1244 return;
f95549cf 1245 }
003707c7 1246 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537
TM		 1247 nfs4_stateid_copy(&state->stateid, stateid);
1248 nfs4_stateid_copy(&state->open_stateid, stateid);
226056c5
TM		 1249}
1250
1251static void nfs_clear_open_stateid(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
1252{
1253 write_seqlock(&state->seqlock);
1254 nfs_clear_open_stateid_locked(state, stateid, fmode);
1255 write_sequnlock(&state->seqlock);
4f14c194
TM		 1256 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1257 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
226056c5
TM		 1258}
1259
dc0b027d 1260static void nfs_set_open_stateid_locked(struct nfs4_state *state, nfs4_stateid *stateid, fmode_t fmode)
003707c7 1261{
dc0b027d 1262 switch (fmode) {
003707c7
TM		 1263 case FMODE_READ:
1264 set_bit(NFS_O_RDONLY_STATE, &state->flags);
1265 break;
1266 case FMODE_WRITE:
1267 set_bit(NFS_O_WRONLY_STATE, &state->flags);
1268 break;
1269 case FMODE_READ|FMODE_WRITE:
1270 set_bit(NFS_O_RDWR_STATE, &state->flags);
1271 }
e999e80e
TM		 1272 if (!nfs_need_update_open_stateid(state, stateid))
1273 return;
1274 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
1275 nfs4_stateid_copy(&state->stateid, stateid);
1276 nfs4_stateid_copy(&state->open_stateid, stateid);
003707c7
TM		 1277}
1278
dc0b027d 1279static void __update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, const nfs4_stateid *deleg_stateid, fmode_t fmode)
1da177e4 1280{
8bda4e4c
TM		 1281 /*
1282 * Protect the call to nfs4_state_set_mode_locked and
1283 * serialise the stateid update
1284 */
1285 write_seqlock(&state->seqlock);
003707c7 1286 if (deleg_stateid != NULL) {
f597c537 1287 nfs4_stateid_copy(&state->stateid, deleg_stateid);
003707c7
TM		 1288 set_bit(NFS_DELEGATED_STATE, &state->flags);
1289 }
1290 if (open_stateid != NULL)
dc0b027d 1291 nfs_set_open_stateid_locked(state, open_stateid, fmode);
8bda4e4c
TM		 1292 write_sequnlock(&state->seqlock);
1293 spin_lock(&state->owner->so_lock);
dc0b027d 1294 update_open_stateflags(state, fmode);
ec073428 1295 spin_unlock(&state->owner->so_lock);
1da177e4
LT		 1296}
1297
dc0b027d 1298static int update_open_stateid(struct nfs4_state *state, nfs4_stateid *open_stateid, nfs4_stateid *delegation, fmode_t fmode)
34310430
TM		 1299{
1300 struct nfs_inode *nfsi = NFS_I(state->inode);
1301 struct nfs_delegation *deleg_cur;
1302 int ret = 0;
1303
dc0b027d 1304 fmode &= (FMODE_READ|FMODE_WRITE);
34310430
TM		 1305
1306 rcu_read_lock();
1307 deleg_cur = rcu_dereference(nfsi->delegation);
1308 if (deleg_cur == NULL)
1309 goto no_delegation;
1310
1311 spin_lock(&deleg_cur->lock);
17f26b12 1312 if (rcu_dereference(nfsi->delegation) != deleg_cur ||
d25be546 1313 test_bit(NFS_DELEGATION_RETURNING, &deleg_cur->flags) ||
dc0b027d 1314 (deleg_cur->type & fmode) != fmode)
34310430
TM		 1315 goto no_delegation_unlock;
1316
1317 if (delegation == NULL)
1318 delegation = &deleg_cur->stateid;
f597c537 1319 else if (!nfs4_stateid_match(&deleg_cur->stateid, delegation))
34310430
TM		 1320 goto no_delegation_unlock;
1321
b7391f44 1322 nfs_mark_delegation_referenced(deleg_cur);
dc0b027d 1323 __update_open_stateid(state, open_stateid, &deleg_cur->stateid, fmode);
34310430
TM		 1324 ret = 1;
1325no_delegation_unlock:
1326 spin_unlock(&deleg_cur->lock);
1327no_delegation:
1328 rcu_read_unlock();
1329
1330 if (!ret && open_stateid != NULL) {
dc0b027d 1331 __update_open_stateid(state, open_stateid, NULL, fmode);
34310430
TM		 1332 ret = 1;
1333 }
4f14c194
TM		 1334 if (test_bit(NFS_STATE_RECLAIM_NOGRACE, &state->flags))
1335 nfs4_schedule_state_manager(state->owner->so_server->nfs_client);
34310430
TM		 1336
1337 return ret;
1338}
1339
39071e6f
TM		 1340static bool nfs4_update_lock_stateid(struct nfs4_lock_state *lsp,
1341 const nfs4_stateid *stateid)
1342{
1343 struct nfs4_state *state = lsp->ls_state;
1344 bool ret = false;
1345
1346 spin_lock(&state->state_lock);
1347 if (!nfs4_stateid_match_other(stateid, &lsp->ls_stateid))
1348 goto out_noupdate;
1349 if (!nfs4_stateid_is_newer(stateid, &lsp->ls_stateid))
1350 goto out_noupdate;
1351 nfs4_stateid_copy(&lsp->ls_stateid, stateid);
1352 ret = true;
1353out_noupdate:
1354 spin_unlock(&state->state_lock);
1355 return ret;
1356}
34310430 1357
dc0b027d 1358static void nfs4_return_incompatible_delegation(struct inode *inode, fmode_t fmode)
aac00a8d
TM		 1359{
1360 struct nfs_delegation *delegation;
1361
1362 rcu_read_lock();
1363 delegation = rcu_dereference(NFS_I(inode)->delegation);
dc0b027d 1364 if (delegation == NULL || (delegation->type & fmode) == fmode) {
aac00a8d
TM		 1365 rcu_read_unlock();
1366 return;
1367 }
1368 rcu_read_unlock();
57ec14c5 1369 nfs4_inode_return_delegation(inode);
aac00a8d
TM		 1370}
1371
6ee41268 1372static struct nfs4_state *nfs4_try_open_cached(struct nfs4_opendata *opendata)
aac00a8d
TM		 1373{
1374 struct nfs4_state *state = opendata->state;
1375 struct nfs_inode *nfsi = NFS_I(state->inode);
1376 struct nfs_delegation *delegation;
f448badd 1377 int open_mode = opendata->o_arg.open_flags;
dc0b027d 1378 fmode_t fmode = opendata->o_arg.fmode;
aac00a8d
TM		 1379 nfs4_stateid stateid;
1380 int ret = -EAGAIN;
1381
aac00a8d 1382 for (;;) {
61beef75 1383 spin_lock(&state->owner->so_lock);
dc0b027d 1384 if (can_open_cached(state, fmode, open_mode)) {
61beef75 1385 update_open_stateflags(state, fmode);
6ee41268 1386 spin_unlock(&state->owner->so_lock);
61beef75 1387 goto out_return_state;
6ee41268 1388 }
61beef75 1389 spin_unlock(&state->owner->so_lock);
34310430
TM		 1390 rcu_read_lock();
1391 delegation = rcu_dereference(nfsi->delegation);
652f89f6 1392 if (!can_open_delegated(delegation, fmode)) {
34310430 1393 rcu_read_unlock();
aac00a8d 1394 break;
34310430 1395 }
aac00a8d 1396 /* Save the delegation */
f597c537 1397 nfs4_stateid_copy(&stateid, &delegation->stateid);
aac00a8d 1398 rcu_read_unlock();
fa332941 1399 nfs_release_seqid(opendata->o_arg.seqid);
bdeca1b7
TM		 1400 if (!opendata->is_recover) {
1401 ret = nfs_may_open(state->inode, state->owner->so_cred, open_mode);
1402 if (ret != 0)
1403 goto out;
1404 }
aac00a8d 1405 ret = -EAGAIN;
34310430
TM		 1406
1407 /* Try to update the stateid using the delegation */
dc0b027d 1408 if (update_open_stateid(state, NULL, &stateid, fmode))
34310430 1409 goto out_return_state;
aac00a8d 1410 }
aac00a8d
TM		 1411out:
1412 return ERR_PTR(ret);
1413out_return_state:
1414 atomic_inc(&state->count);
1415 return state;
1416}
1417
e23008ec
AA		 1418static void
1419nfs4_opendata_check_deleg(struct nfs4_opendata *data, struct nfs4_state *state)
1420{
1421 struct nfs_client *clp = NFS_SERVER(state->inode)->nfs_client;
1422 struct nfs_delegation *delegation;
1423 int delegation_flags = 0;
1424
1425 rcu_read_lock();
1426 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
1427 if (delegation)
1428 delegation_flags = delegation->flags;
1429 rcu_read_unlock();
1430 if (data->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR) {
1431 pr_err_ratelimited("NFS: Broken NFSv4 server %s is "
1432 "returning a delegation for "
1433 "OPEN(CLAIM_DELEGATE_CUR)\n",
1434 clp->cl_hostname);
1435 } else if ((delegation_flags & 1UL<<NFS_DELEGATION_NEED_RECLAIM) == 0)
1436 nfs_inode_set_delegation(state->inode,
1437 data->owner->so_cred,
1438 &data->o_res);
1439 else
1440 nfs_inode_reclaim_delegation(state->inode,
1441 data->owner->so_cred,
1442 &data->o_res);
1443}
1444
1445/*
1446 * Check the inode attributes against the CLAIM_PREVIOUS returned attributes
1447 * and update the nfs4_state.
1448 */
1449static struct nfs4_state *
1450_nfs4_opendata_reclaim_to_nfs4_state(struct nfs4_opendata *data)
1451{
1452 struct inode *inode = data->state->inode;
1453 struct nfs4_state *state = data->state;
1454 int ret;
1455
d2bfda2e
WAA		 1456 if (!data->rpc_done) {
1457 if (data->rpc_status) {
1458 ret = data->rpc_status;
1459 goto err;
1460 }
1461 /* cached opens have already been processed */
1462 goto update;
e23008ec
AA		 1463 }
1464
e23008ec
AA		 1465 ret = nfs_refresh_inode(inode, &data->f_attr);
1466 if (ret)
1467 goto err;
1468
1469 if (data->o_res.delegation_type != 0)
1470 nfs4_opendata_check_deleg(data, state);
d2bfda2e 1471update:
e23008ec
AA		 1472 update_open_stateid(state, &data->o_res.stateid, NULL,
1473 data->o_arg.fmode);
d49f042a 1474 atomic_inc(&state->count);
e23008ec
AA		 1475
1476 return state;
1477err:
1478 return ERR_PTR(ret);
1479
1480}
1481
1482static struct nfs4_state *
1483_nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
24ac23ab
TM		 1484{
1485 struct inode *inode;
1486 struct nfs4_state *state = NULL;
1b370bc2 1487 int ret;
24ac23ab 1488
aac00a8d 1489 if (!data->rpc_done) {
6ee41268 1490 state = nfs4_try_open_cached(data);
aac00a8d
TM		 1491 goto out;
1492 }
1493
1b370bc2 1494 ret = -EAGAIN;
24ac23ab 1495 if (!(data->f_attr.valid & NFS_ATTR_FATTR))
1b370bc2 1496 goto err;
1775fd3e 1497 inode = nfs_fhget(data->dir->d_sb, &data->o_res.fh, &data->f_attr, data->f_label);
1b370bc2 1498 ret = PTR_ERR(inode);
03f28e3a 1499 if (IS_ERR(inode))
1b370bc2
TM		 1500 goto err;
1501 ret = -ENOMEM;
24ac23ab
TM		 1502 state = nfs4_get_open_state(inode, data->owner);
1503 if (state == NULL)
1b370bc2 1504 goto err_put_inode;
e23008ec
AA		 1505 if (data->o_res.delegation_type != 0)
1506 nfs4_opendata_check_deleg(data, state);
34310430 1507 update_open_stateid(state, &data->o_res.stateid, NULL,
dc0b027d 1508 data->o_arg.fmode);
24ac23ab 1509 iput(inode);
aac00a8d 1510out:
7aa262b5 1511 nfs_release_seqid(data->o_arg.seqid);
24ac23ab 1512 return state;
1b370bc2
TM		 1513err_put_inode:
1514 iput(inode);
1515err:
1516 return ERR_PTR(ret);
24ac23ab
TM		 1517}
1518
e23008ec
AA		 1519static struct nfs4_state *
1520nfs4_opendata_to_nfs4_state(struct nfs4_opendata *data)
1521{
1522 if (data->o_arg.claim == NFS4_OPEN_CLAIM_PREVIOUS)
1523 return _nfs4_opendata_reclaim_to_nfs4_state(data);
1524 return _nfs4_opendata_to_nfs4_state(data);
1525}
1526
864472e9
TM		 1527static struct nfs_open_context *nfs4_state_find_open_context(struct nfs4_state *state)
1528{
1529 struct nfs_inode *nfsi = NFS_I(state->inode);
1530 struct nfs_open_context *ctx;
1531
1532 spin_lock(&state->inode->i_lock);
1533 list_for_each_entry(ctx, &nfsi->open_files, list) {
1534 if (ctx->state != state)
1535 continue;
1536 get_nfs_open_context(ctx);
1537 spin_unlock(&state->inode->i_lock);
1538 return ctx;
1539 }
1540 spin_unlock(&state->inode->i_lock);
1541 return ERR_PTR(-ENOENT);
1542}
1543
4a1c0893
TM		 1544static struct nfs4_opendata *nfs4_open_recoverdata_alloc(struct nfs_open_context *ctx,
1545 struct nfs4_state *state, enum open_claim_type4 claim)
6f220ed5
TM		 1546{
1547 struct nfs4_opendata *opendata;
1548
4a1c0893 1549 opendata = nfs4_opendata_alloc(ctx->dentry, state->owner, 0, 0,
1775fd3e 1550 NULL, NULL, claim, GFP_NOFS);
6f220ed5
TM		 1551 if (opendata == NULL)
1552 return ERR_PTR(-ENOMEM);
1553 opendata->state = state;
1554 atomic_inc(&state->count);
1555 return opendata;
1556}
1557
dc0b027d 1558static int nfs4_open_recover_helper(struct nfs4_opendata *opendata, fmode_t fmode, struct nfs4_state **res)
864472e9 1559{
2ced46c2 1560 struct nfs4_state *newstate;
864472e9
TM		 1561 int ret;
1562
39f897fd
N		 1563 if ((opendata->o_arg.claim == NFS4_OPEN_CLAIM_DELEGATE_CUR ||
1564 opendata->o_arg.claim == NFS4_OPEN_CLAIM_DELEG_CUR_FH) &&
1565 (opendata->o_arg.u.delegation_type & fmode) != fmode)
1566 /* This mode can't have been delegated, so we must have
1567 * a valid open_stateid to cover it - not need to reclaim.
1568 */
1569 return 0;
dc0b027d
TM		 1570 opendata->o_arg.open_flags = 0;
1571 opendata->o_arg.fmode = fmode;
be36e185
TM		 1572 opendata->o_arg.share_access = nfs4_map_atomic_open_share(
1573 NFS_SB(opendata->dentry->d_sb),
1574 fmode, 0);
2ced46c2
TM		 1575 memset(&opendata->o_res, 0, sizeof(opendata->o_res));
1576 memset(&opendata->c_res, 0, sizeof(opendata->c_res));
1577 nfs4_init_opendata_res(opendata);
b257957e 1578 ret = _nfs4_recover_proc_open(opendata);
864472e9
TM		 1579 if (ret != 0)
1580 return ret;
2ced46c2 1581 newstate = nfs4_opendata_to_nfs4_state(opendata);
1b370bc2
TM		 1582 if (IS_ERR(newstate))
1583 return PTR_ERR(newstate);
643168c2 1584 nfs4_close_state(newstate, fmode);
2ced46c2 1585 *res = newstate;
864472e9
TM		 1586 return 0;
1587}
1588
1589static int nfs4_open_recover(struct nfs4_opendata *opendata, struct nfs4_state *state)
1590{
864472e9 1591 struct nfs4_state *newstate;
864472e9
TM		 1592 int ret;
1593
4f14c194
TM		 1594 /* Don't trigger recovery in nfs_test_and_clear_all_open_stateid */
1595 clear_bit(NFS_O_RDWR_STATE, &state->flags);
1596 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
1597 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
864472e9 1598 /* memory barrier prior to reading state->n_* */
2ced46c2 1599 clear_bit(NFS_DELEGATED_STATE, &state->flags);
fd068b20 1600 clear_bit(NFS_OPEN_STATE, &state->flags);
864472e9
TM		 1601 smp_rmb();
1602 if (state->n_rdwr != 0) {
2ced46c2 1603 ret = nfs4_open_recover_helper(opendata, FMODE_READ|FMODE_WRITE, &newstate);
864472e9
TM		 1604 if (ret != 0)
1605 return ret;
2ced46c2
TM		 1606 if (newstate != state)
1607 return -ESTALE;
864472e9
TM		 1608 }
1609 if (state->n_wronly != 0) {
2ced46c2 1610 ret = nfs4_open_recover_helper(opendata, FMODE_WRITE, &newstate);
864472e9
TM		 1611 if (ret != 0)
1612 return ret;
2ced46c2
TM		 1613 if (newstate != state)
1614 return -ESTALE;
864472e9
TM		 1615 }
1616 if (state->n_rdonly != 0) {
2ced46c2 1617 ret = nfs4_open_recover_helper(opendata, FMODE_READ, &newstate);
864472e9
TM		 1618 if (ret != 0)
1619 return ret;
2ced46c2
TM		 1620 if (newstate != state)
1621 return -ESTALE;
864472e9 1622 }
1ac7e2fd
TM		 1623 /*
1624 * We may have performed cached opens for all three recoveries.
1625 * Check if we need to update the current stateid.
1626 */
1627 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0 &&
f597c537 1628 !nfs4_stateid_match(&state->stateid, &state->open_stateid)) {
8bda4e4c 1629 write_seqlock(&state->seqlock);
1ac7e2fd 1630 if (test_bit(NFS_DELEGATED_STATE, &state->flags) == 0)
f597c537 1631 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
8bda4e4c 1632 write_sequnlock(&state->seqlock);
1ac7e2fd 1633 }
864472e9
TM		 1634 return 0;
1635}
1636
1da177e4
LT		 1637/*
1638 * OPEN_RECLAIM:
1639 * reclaim state on the server after a reboot.
1da177e4 1640 */
539cd03a 1641static int _nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 1642{
1ac7e2fd 1643 struct nfs_delegation *delegation;
864472e9 1644 struct nfs4_opendata *opendata;
dc0b027d 1645 fmode_t delegation_type = 0;
1da177e4
LT		 1646 int status;
1647
4a1c0893
TM		 1648 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1649 NFS4_OPEN_CLAIM_PREVIOUS);
6f220ed5
TM		 1650 if (IS_ERR(opendata))
1651 return PTR_ERR(opendata);
1ac7e2fd
TM		 1652 rcu_read_lock();
1653 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
15c831bf 1654 if (delegation != NULL && test_bit(NFS_DELEGATION_NEED_RECLAIM, &delegation->flags) != 0)
65bbf6bd 1655 delegation_type = delegation->type;
1ac7e2fd 1656 rcu_read_unlock();
864472e9
TM		 1657 opendata->o_arg.u.delegation_type = delegation_type;
1658 status = nfs4_open_recover(opendata, state);
c6d00e63 1659 nfs4_opendata_put(opendata);
1da177e4
LT		 1660 return status;
1661}
1662
539cd03a 1663static int nfs4_do_open_reclaim(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4
LT		 1664{
1665 struct nfs_server *server = NFS_SERVER(state->inode);
1666 struct nfs4_exception exception = { };
1667 int err;
1668 do {
539cd03a 1669 err = _nfs4_do_open_reclaim(ctx, state);
42113a75 1670 trace_nfs4_open_reclaim(ctx, 0, err);
49f9a0fa
TM		 1671 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
1672 continue;
168667c4 1673 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 1674 break;
1675 nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 1676 } while (exception.retry);
1677 return err;
1678}
1679
864472e9
TM		 1680static int nfs4_open_reclaim(struct nfs4_state_owner *sp, struct nfs4_state *state)
1681{
1682 struct nfs_open_context *ctx;
1683 int ret;
1684
1685 ctx = nfs4_state_find_open_context(state);
1686 if (IS_ERR(ctx))
91876b13 1687 return -EAGAIN;
539cd03a 1688 ret = nfs4_do_open_reclaim(ctx, state);
864472e9
TM		 1689 put_nfs_open_context(ctx);
1690 return ret;
1691}
1692
db4f2e63 1693static int nfs4_handle_delegation_recall_error(struct nfs_server *server, struct nfs4_state *state, const nfs4_stateid *stateid, int err)
1da177e4 1694{
be76b5b6
TM		 1695 switch (err) {
1696 default:
1697 printk(KERN_ERR "NFS: %s: unhandled error "
1698 "%d.\n", __func__, err);
1699 case 0:
1700 case -ENOENT:
8eee52af 1701 case -EAGAIN:
be76b5b6
TM		 1702 case -ESTALE:
1703 break;
1704 case -NFS4ERR_BADSESSION:
1705 case -NFS4ERR_BADSLOT:
1706 case -NFS4ERR_BAD_HIGH_SLOT:
1707 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
1708 case -NFS4ERR_DEADSESSION:
1709 set_bit(NFS_DELEGATED_STATE, &state->flags);
1710 nfs4_schedule_session_recovery(server->nfs_client->cl_session, err);
1711 return -EAGAIN;
1712 case -NFS4ERR_STALE_CLIENTID:
1713 case -NFS4ERR_STALE_STATEID:
1714 set_bit(NFS_DELEGATED_STATE, &state->flags);
1715 case -NFS4ERR_EXPIRED:
1716 /* Don't recall a delegation if it was lost */
1717 nfs4_schedule_lease_recovery(server->nfs_client);
1718 return -EAGAIN;
352297b9
CL		 1719 case -NFS4ERR_MOVED:
1720 nfs4_schedule_migration_recovery(server);
1721 return -EAGAIN;
8ef2f8d4
CL		 1722 case -NFS4ERR_LEASE_MOVED:
1723 nfs4_schedule_lease_moved_recovery(server->nfs_client);
1724 return -EAGAIN;
be76b5b6
TM		 1725 case -NFS4ERR_DELEG_REVOKED:
1726 case -NFS4ERR_ADMIN_REVOKED:
1727 case -NFS4ERR_BAD_STATEID:
db4f2e63 1728 case -NFS4ERR_OPENMODE:
be76b5b6
TM		 1729 nfs_inode_find_state_and_recover(state->inode,
1730 stateid);
1731 nfs4_schedule_stateid_recovery(server, state);
869f9dfa 1732 return -EAGAIN;
be76b5b6
TM		 1733 case -NFS4ERR_DELAY:
1734 case -NFS4ERR_GRACE:
1735 set_bit(NFS_DELEGATED_STATE, &state->flags);
1736 ssleep(1);
1737 return -EAGAIN;
db4f2e63
TM		 1738 case -ENOMEM:
1739 case -NFS4ERR_DENIED:
1740 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
1741 return 0;
be76b5b6 1742 }
1da177e4
LT		 1743 return err;
1744}
1745
db4f2e63
TM		 1746int nfs4_open_delegation_recall(struct nfs_open_context *ctx, struct nfs4_state *state, const nfs4_stateid *stateid)
1747{
1748 struct nfs_server *server = NFS_SERVER(state->inode);
1749 struct nfs4_opendata *opendata;
1750 int err;
1751
1752 opendata = nfs4_open_recoverdata_alloc(ctx, state,
1753 NFS4_OPEN_CLAIM_DELEG_CUR_FH);
1754 if (IS_ERR(opendata))
1755 return PTR_ERR(opendata);
1756 nfs4_stateid_copy(&opendata->o_arg.u.delegation, stateid);
1757 err = nfs4_open_recover(opendata, state);
1758 nfs4_opendata_put(opendata);
1759 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
1760}
1761
be05c860
CL		 1762static void nfs4_open_confirm_prepare(struct rpc_task *task, void *calldata)
1763{
1764 struct nfs4_opendata *data = calldata;
1765
cb04ad2a
PT		 1766 nfs40_setup_sequence(data->o_arg.server->nfs_client->cl_slot_tbl,
1767 &data->c_arg.seq_args, &data->c_res.seq_res, task);
be05c860
CL		 1768}
1769
cdd4e68b
TM		 1770static void nfs4_open_confirm_done(struct rpc_task *task, void *calldata)
1771{
1772 struct nfs4_opendata *data = calldata;
1773
17ead6c8 1774 nfs40_sequence_done(task, &data->c_res.seq_res);
be05c860 1775
cdd4e68b 1776 data->rpc_status = task->tk_status;
26e976a8 1777 if (data->rpc_status == 0) {
f597c537 1778 nfs4_stateid_copy(&data->o_res.stateid, &data->c_res.stateid);
bb22629e 1779 nfs_confirm_seqid(&data->owner->so_seqid, 0);
26e976a8 1780 renew_lease(data->o_res.server, data->timestamp);
3e309914 1781 data->rpc_done = 1;
26e976a8 1782 }
cdd4e68b
TM		 1783}
1784
1785static void nfs4_open_confirm_release(void *calldata)
1786{
1787 struct nfs4_opendata *data = calldata;
1788 struct nfs4_state *state = NULL;
1789
1790 /* If this request hasn't been cancelled, do nothing */
1791 if (data->cancelled == 0)
1792 goto out_free;
1793 /* In case of error, no cleanup! */
3e309914 1794 if (!data->rpc_done)
cdd4e68b 1795 goto out_free;
cdd4e68b 1796 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1797 if (!IS_ERR(state))
643168c2 1798 nfs4_close_state(state, data->o_arg.fmode);
cdd4e68b 1799out_free:
c6d00e63 1800 nfs4_opendata_put(data);
cdd4e68b
TM		 1801}
1802
1803static const struct rpc_call_ops nfs4_open_confirm_ops = {
be05c860 1804 .rpc_call_prepare = nfs4_open_confirm_prepare,
cdd4e68b
TM		 1805 .rpc_call_done = nfs4_open_confirm_done,
1806 .rpc_release = nfs4_open_confirm_release,
1807};
1808
1809/*
1810 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
1811 */
1812static int _nfs4_proc_open_confirm(struct nfs4_opendata *data)
1813{
2b0143b5 1814 struct nfs_server *server = NFS_SERVER(d_inode(data->dir));
cdd4e68b 1815 struct rpc_task *task;
5138fde0
TM		 1816 struct rpc_message msg = {
1817 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_CONFIRM],
1818 .rpc_argp = &data->c_arg,
1819 .rpc_resp = &data->c_res,
1820 .rpc_cred = data->owner->so_cred,
1821 };
c970aa85
TM		 1822 struct rpc_task_setup task_setup_data = {
1823 .rpc_client = server->client,
5138fde0 1824 .rpc_message = &msg,
c970aa85
TM		 1825 .callback_ops = &nfs4_open_confirm_ops,
1826 .callback_data = data,
101070ca 1827 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1828 .flags = RPC_TASK_ASYNC,
1829 };
1da177e4
LT		 1830 int status;
1831
17ead6c8 1832 nfs4_init_sequence(&data->c_arg.seq_args, &data->c_res.seq_res, 1);
c6d00e63 1833 kref_get(&data->kref);
3e309914
TM		 1834 data->rpc_done = 0;
1835 data->rpc_status = 0;
5138fde0 1836 data->timestamp = jiffies;
c970aa85 1837 task = rpc_run_task(&task_setup_data);
7a1218a2 1838 if (IS_ERR(task))
cdd4e68b 1839 return PTR_ERR(task);
cdd4e68b
TM		 1840 status = nfs4_wait_for_completion_rpc_task(task);
1841 if (status != 0) {
1842 data->cancelled = 1;
1843 smp_wmb();
1844 } else
1845 status = data->rpc_status;
e6b3c4db 1846 rpc_put_task(task);
1da177e4
LT		 1847 return status;
1848}
1849
24ac23ab 1850static void nfs4_open_prepare(struct rpc_task *task, void *calldata)
1da177e4 1851{
24ac23ab
TM		 1852 struct nfs4_opendata *data = calldata;
1853 struct nfs4_state_owner *sp = data->owner;
549b19cc 1854 struct nfs_client *clp = sp->so_server->nfs_client;
5138fde0 1855
24ac23ab 1856 if (nfs_wait_on_sequence(data->o_arg.seqid, task) != 0)
c8da19b9 1857 goto out_wait;
aac00a8d
TM		 1858 /*
1859 * Check if we still need to send an OPEN call, or if we can use
1860 * a delegation instead.
1861 */
1862 if (data->state != NULL) {
1863 struct nfs_delegation *delegation;
1864
dc0b027d 1865 if (can_open_cached(data->state, data->o_arg.fmode, data->o_arg.open_flags))
6ee41268 1866 goto out_no_action;
aac00a8d
TM		 1867 rcu_read_lock();
1868 delegation = rcu_dereference(NFS_I(data->state->inode)->delegation);
652f89f6 1869 if (data->o_arg.claim != NFS4_OPEN_CLAIM_DELEGATE_CUR &&
cd4c9be2 1870 data->o_arg.claim != NFS4_OPEN_CLAIM_DELEG_CUR_FH &&
652f89f6
TM		 1871 can_open_delegated(delegation, data->o_arg.fmode))
1872 goto unlock_no_action;
aac00a8d
TM		 1873 rcu_read_unlock();
1874 }
95b72eb0 1875 /* Update client id. */
549b19cc 1876 data->o_arg.clientid = clp->cl_clientid;
8188df17
TM		 1877 switch (data->o_arg.claim) {
1878 case NFS4_OPEN_CLAIM_PREVIOUS:
1879 case NFS4_OPEN_CLAIM_DELEG_CUR_FH:
1880 case NFS4_OPEN_CLAIM_DELEG_PREV_FH:
e23008ec 1881 data->o_arg.open_bitmap = &nfs4_open_noattr_bitmap[0];
8188df17
TM		 1882 case NFS4_OPEN_CLAIM_FH:
1883 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_NOATTR];
6f220ed5
TM		 1884 nfs_copy_fh(&data->o_res.fh, data->o_arg.fh);
1885 }
26e976a8 1886 data->timestamp = jiffies;
035168ab 1887 if (nfs4_setup_sequence(data->o_arg.server,
d898528c 1888 &data->o_arg.seq_args,
2240a9e2
TM		 1889 &data->o_res.seq_res,
1890 task) != 0)
1891 nfs_release_seqid(data->o_arg.seqid);
549b19cc
TM		 1892
1893 /* Set the create mode (note dependency on the session type) */
1894 data->o_arg.createmode = NFS4_CREATE_UNCHECKED;
1895 if (data->o_arg.open_flags & O_EXCL) {
1896 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE;
1897 if (nfs4_has_persistent_session(clp))
1898 data->o_arg.createmode = NFS4_CREATE_GUARDED;
1899 else if (clp->cl_mvops->minor_version > 0)
1900 data->o_arg.createmode = NFS4_CREATE_EXCLUSIVE4_1;
1901 }
6ee41268 1902 return;
652f89f6
TM		 1903unlock_no_action:
1904 rcu_read_unlock();
6ee41268
TM		 1905out_no_action:
1906 task->tk_action = NULL;
c8da19b9 1907out_wait:
b75ad4cd 1908 nfs4_sequence_done(task, &data->o_res.seq_res);
b257957e
AB		 1909}
1910
24ac23ab
TM		 1911static void nfs4_open_done(struct rpc_task *task, void *calldata)
1912{
1913 struct nfs4_opendata *data = calldata;
1da177e4 1914
24ac23ab 1915 data->rpc_status = task->tk_status;
d898528c 1916
14516c3a
TM		 1917 if (!nfs4_sequence_done(task, &data->o_res.seq_res))
1918 return;
d898528c 1919
24ac23ab 1920 if (task->tk_status == 0) {
807d66d8
TM		 1921 if (data->o_res.f_attr->valid & NFS_ATTR_FATTR_TYPE) {
1922 switch (data->o_res.f_attr->mode & S_IFMT) {
6f926b5b
TM		 1923 case S_IFREG:
1924 break;
1925 case S_IFLNK:
24ac23ab 1926 data->rpc_status = -ELOOP;
6f926b5b
TM		 1927 break;
1928 case S_IFDIR:
24ac23ab 1929 data->rpc_status = -EISDIR;
6f926b5b
TM		 1930 break;
1931 default:
24ac23ab 1932 data->rpc_status = -ENOTDIR;
807d66d8 1933 }
6f926b5b 1934 }
26e976a8 1935 renew_lease(data->o_res.server, data->timestamp);
0f9f95e0
TM		 1936 if (!(data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM))
1937 nfs_confirm_seqid(&data->owner->so_seqid, 0);
6f926b5b 1938 }
3e309914 1939 data->rpc_done = 1;
24ac23ab 1940}
6f926b5b 1941
24ac23ab
TM		 1942static void nfs4_open_release(void *calldata)
1943{
1944 struct nfs4_opendata *data = calldata;
1945 struct nfs4_state *state = NULL;
1946
1947 /* If this request hasn't been cancelled, do nothing */
1948 if (data->cancelled == 0)
1949 goto out_free;
1950 /* In case of error, no cleanup! */
3e309914 1951 if (data->rpc_status != 0 || !data->rpc_done)
24ac23ab
TM		 1952 goto out_free;
1953 /* In case we need an open_confirm, no cleanup! */
1954 if (data->o_res.rflags & NFS4_OPEN_RESULT_CONFIRM)
1955 goto out_free;
24ac23ab 1956 state = nfs4_opendata_to_nfs4_state(data);
1b370bc2 1957 if (!IS_ERR(state))
643168c2 1958 nfs4_close_state(state, data->o_arg.fmode);
24ac23ab 1959out_free:
c6d00e63 1960 nfs4_opendata_put(data);
24ac23ab
TM		 1961}
1962
1963static const struct rpc_call_ops nfs4_open_ops = {
1964 .rpc_call_prepare = nfs4_open_prepare,
1965 .rpc_call_done = nfs4_open_done,
1966 .rpc_release = nfs4_open_release,
1967};
1968
b257957e 1969static int nfs4_run_open_task(struct nfs4_opendata *data, int isrecover)
24ac23ab 1970{
2b0143b5 1971 struct inode *dir = d_inode(data->dir);
24ac23ab
TM		 1972 struct nfs_server *server = NFS_SERVER(dir);
1973 struct nfs_openargs *o_arg = &data->o_arg;
1974 struct nfs_openres *o_res = &data->o_res;
1975 struct rpc_task *task;
5138fde0
TM		 1976 struct rpc_message msg = {
1977 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN],
1978 .rpc_argp = o_arg,
1979 .rpc_resp = o_res,
1980 .rpc_cred = data->owner->so_cred,
1981 };
c970aa85
TM		 1982 struct rpc_task_setup task_setup_data = {
1983 .rpc_client = server->client,
5138fde0 1984 .rpc_message = &msg,
c970aa85
TM		 1985 .callback_ops = &nfs4_open_ops,
1986 .callback_data = data,
101070ca 1987 .workqueue = nfsiod_workqueue,
c970aa85
TM		 1988 .flags = RPC_TASK_ASYNC,
1989 };
24ac23ab
TM		 1990 int status;
1991
a9c92d6b 1992 nfs4_init_sequence(&o_arg->seq_args, &o_res->seq_res, 1);
c6d00e63 1993 kref_get(&data->kref);
3e309914
TM		 1994 data->rpc_done = 0;
1995 data->rpc_status = 0;
2ced46c2 1996 data->cancelled = 0;
bdeca1b7
TM		 1997 data->is_recover = 0;
1998 if (isrecover) {
8fe72bac 1999 nfs4_set_sequence_privileged(&o_arg->seq_args);
bdeca1b7
TM		 2000 data->is_recover = 1;
2001 }
c970aa85 2002 task = rpc_run_task(&task_setup_data);
b257957e
AB		 2003 if (IS_ERR(task))
2004 return PTR_ERR(task);
2005 status = nfs4_wait_for_completion_rpc_task(task);
2006 if (status != 0) {
2007 data->cancelled = 1;
2008 smp_wmb();
2009 } else
2010 status = data->rpc_status;
2011 rpc_put_task(task);
2012
2013 return status;
2014}
2015
2016static int _nfs4_recover_proc_open(struct nfs4_opendata *data)
2017{
2b0143b5 2018 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2019 struct nfs_openres *o_res = &data->o_res;
2020 int status;
2021
2022 status = nfs4_run_open_task(data, 1);
2023 if (status != 0 || !data->rpc_done)
2024 return status;
2025
6926afd1
TM		 2026 nfs_fattr_map_and_free_names(NFS_SERVER(dir), &data->f_attr);
2027
b257957e
AB		 2028 if (o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
2029 status = _nfs4_proc_open_confirm(data);
2030 if (status != 0)
2031 return status;
2032 }
2033
2034 return status;
2035}
2036
f3792d63
TM		 2037/*
2038 * Additional permission checks in order to distinguish between an
2039 * open for read, and an open for execute. This works around the
2040 * fact that NFSv4 OPEN treats read and execute permissions as being
2041 * the same.
2042 * Note that in the non-execute case, we want to turn off permission
2043 * checking if we just created a new file (POSIX open() semantics).
2044 */
6168f62c
WAA		 2045static int nfs4_opendata_access(struct rpc_cred *cred,
2046 struct nfs4_opendata *opendata,
f8d9a897
WAA		 2047 struct nfs4_state *state, fmode_t fmode,
2048 int openflags)
6168f62c
WAA		 2049{
2050 struct nfs_access_entry cache;
2051 u32 mask;
2052
2053 /* access call failed or for some reason the server doesn't
2054 * support any access modes -- defer access call until later */
2055 if (opendata->o_res.access_supported == 0)
2056 return 0;
2057
2058 mask = 0;
f3792d63
TM		 2059 /*
2060 * Use openflags to check for exec, because fmode won't
2061 * always have FMODE_EXEC set when file open for exec.
2062 */
f8d9a897
WAA		 2063 if (openflags & __FMODE_EXEC) {
2064 /* ONLY check for exec rights */
2065 mask = MAY_EXEC;
f3792d63 2066 } else if ((fmode & FMODE_READ) && !opendata->file_created)
f8d9a897 2067 mask = MAY_READ;
6168f62c
WAA		 2068
2069 cache.cred = cred;
2070 cache.jiffies = jiffies;
2071 nfs_access_set_mask(&cache, opendata->o_res.access_result);
2072 nfs_access_add_cache(state->inode, &cache);
2073
bbd3a8ee 2074 if ((mask & ~cache.mask & (MAY_READ | MAY_EXEC)) == 0)
6168f62c
WAA		 2075 return 0;
2076
2077 /* even though OPEN succeeded, access is denied. Close the file */
2078 nfs4_close_state(state, fmode);
998f40b5 2079 return -EACCES;
6168f62c
WAA		 2080}
2081
b257957e
AB		 2082/*
2083 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
2084 */
2085static int _nfs4_proc_open(struct nfs4_opendata *data)
2086{
2b0143b5 2087 struct inode *dir = d_inode(data->dir);
b257957e
AB		 2088 struct nfs_server *server = NFS_SERVER(dir);
2089 struct nfs_openargs *o_arg = &data->o_arg;
2090 struct nfs_openres *o_res = &data->o_res;
2091 int status;
2092
2093 status = nfs4_run_open_task(data, 0);
08ef7bd3
TM		 2094 if (!data->rpc_done)
2095 return status;
2096 if (status != 0) {
2097 if (status == -NFS4ERR_BADNAME &&
2098 !(o_arg->open_flags & O_CREAT))
2099 return -ENOENT;
24ac23ab 2100 return status;
08ef7bd3 2101 }
24ac23ab 2102
6926afd1
TM		 2103 nfs_fattr_map_and_free_names(server, &data->f_attr);
2104
5bc2afc2 2105 if (o_arg->open_flags & O_CREAT) {
56ae19f3 2106 update_changeattr(dir, &o_res->cinfo);
5bc2afc2
TM		 2107 if (o_arg->open_flags & O_EXCL)
2108 data->file_created = 1;
2109 else if (o_res->cinfo.before != o_res->cinfo.after)
2110 data->file_created = 1;
2111 }
0df5dd4a
TM		 2112 if ((o_res->rflags & NFS4_OPEN_RESULT_LOCKTYPE_POSIX) == 0)
2113 server->caps &= ~NFS_CAP_POSIX_LOCK;
1da177e4 2114 if(o_res->rflags & NFS4_OPEN_RESULT_CONFIRM) {
cdd4e68b 2115 status = _nfs4_proc_open_confirm(data);
1da177e4 2116 if (status != 0)
24ac23ab 2117 return status;
1da177e4
LT		 2118 }
2119 if (!(o_res->f_attr->valid & NFS_ATTR_FATTR))
8935ef66 2120 nfs4_proc_getattr(server, &o_res->fh, o_res->f_attr, o_res->f_label);
24ac23ab 2121 return 0;
1da177e4
LT		 2122}
2123
d83217c1
AA		 2124static int nfs4_recover_expired_lease(struct nfs_server *server)
2125{
2126 return nfs4_client_recover_expired_lease(server->nfs_client);
2127}
2128
1da177e4
LT		 2129/*
2130 * OPEN_EXPIRED:
2131 * reclaim state on the server after a network partition.
2132 * Assumes caller holds the appropriate lock
2133 */
539cd03a 2134static int _nfs4_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
1da177e4 2135{
e56e0b78 2136 struct nfs4_opendata *opendata;
864472e9 2137 int ret;
1da177e4 2138
4a1c0893 2139 opendata = nfs4_open_recoverdata_alloc(ctx, state,
49f9a0fa 2140 NFS4_OPEN_CLAIM_FH);
6f220ed5
TM		 2141 if (IS_ERR(opendata))
2142 return PTR_ERR(opendata);
864472e9 2143 ret = nfs4_open_recover(opendata, state);
35d05778 2144 if (ret == -ESTALE)
3d4ff43d 2145 d_drop(ctx->dentry);
c6d00e63 2146 nfs4_opendata_put(opendata);
864472e9 2147 return ret;
1da177e4
LT		 2148}
2149
a9ed2e25 2150static int nfs4_do_open_expired(struct nfs_open_context *ctx, struct nfs4_state *state)
202b50dc 2151{
539cd03a 2152 struct nfs_server *server = NFS_SERVER(state->inode);
202b50dc
TM		 2153 struct nfs4_exception exception = { };
2154 int err;
2155
2156 do {
539cd03a 2157 err = _nfs4_open_expired(ctx, state);
42113a75 2158 trace_nfs4_open_expired(ctx, 0, err);
49f9a0fa
TM		 2159 if (nfs4_clear_cap_atomic_open_v1(server, err, &exception))
2160 continue;
a9ed2e25
TM		 2161 switch (err) {
2162 default:
2163 goto out;
2164 case -NFS4ERR_GRACE:
2165 case -NFS4ERR_DELAY:
2166 nfs4_handle_exception(server, err, &exception);
2167 err = 0;
2168 }
202b50dc 2169 } while (exception.retry);
a9ed2e25 2170out:
202b50dc
TM		 2171 return err;
2172}
2173
1da177e4
LT		 2174static int nfs4_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2175{
1da177e4 2176 struct nfs_open_context *ctx;
864472e9 2177 int ret;
1da177e4 2178
864472e9
TM		 2179 ctx = nfs4_state_find_open_context(state);
2180 if (IS_ERR(ctx))
91876b13 2181 return -EAGAIN;
539cd03a 2182 ret = nfs4_do_open_expired(ctx, state);
864472e9
TM		 2183 put_nfs_open_context(ctx);
2184 return ret;
1da177e4
LT		 2185}
2186
4dfd4f7a
TM		 2187static void nfs_finish_clear_delegation_stateid(struct nfs4_state *state)
2188{
2189 nfs_remove_bad_delegation(state->inode);
2190 write_seqlock(&state->seqlock);
2191 nfs4_stateid_copy(&state->stateid, &state->open_stateid);
2192 write_sequnlock(&state->seqlock);
2193 clear_bit(NFS_DELEGATED_STATE, &state->flags);
2194}
2195
2196static void nfs40_clear_delegation_stateid(struct nfs4_state *state)
2197{
2198 if (rcu_access_pointer(NFS_I(state->inode)->delegation) != NULL)
2199 nfs_finish_clear_delegation_stateid(state);
2200}
2201
2202static int nfs40_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2203{
2204 /* NFSv4.0 doesn't allow for delegation recovery on open expire */
2205 nfs40_clear_delegation_stateid(state);
2206 return nfs4_open_expired(sp, state);
2207}
2208
f062eb6c 2209#if defined(CONFIG_NFS_V4_1)
0c116cad 2210static void nfs41_check_delegation_stateid(struct nfs4_state *state)
f062eb6c 2211{
f062eb6c 2212 struct nfs_server *server = NFS_SERVER(state->inode);
0c116cad 2213 nfs4_stateid stateid;
ab7cb0df 2214 struct nfs_delegation *delegation;
0c116cad
TM		 2215 struct rpc_cred *cred;
2216 int status;
3e60ffdd 2217
ab7cb0df
TM		 2218 /* Get the delegation credential for use by test/free_stateid */
2219 rcu_read_lock();
2220 delegation = rcu_dereference(NFS_I(state->inode)->delegation);
0c116cad 2221 if (delegation == NULL) {
ab7cb0df 2222 rcu_read_unlock();
0c116cad
TM		 2223 return;
2224 }
2225
2226 nfs4_stateid_copy(&stateid, &delegation->stateid);
2227 cred = get_rpccred(delegation->cred);
2228 rcu_read_unlock();
2229 status = nfs41_test_stateid(server, &stateid, cred);
2230 trace_nfs4_test_delegation_stateid(state, NULL, status);
ab7cb0df 2231
3e60ffdd
CL		 2232 if (status != NFS_OK) {
2233 /* Free the stateid unless the server explicitly
2234 * informs us the stateid is unrecognized. */
2235 if (status != -NFS4ERR_BAD_STATEID)
0c116cad
TM		 2236 nfs41_free_stateid(server, &stateid, cred);
2237 nfs_finish_clear_delegation_stateid(state);
3e60ffdd 2238 }
ab7cb0df 2239
0c116cad 2240 put_rpccred(cred);
3e60ffdd
CL		 2241}
2242
2243/**
2244 * nfs41_check_open_stateid - possibly free an open stateid
2245 *
2246 * @state: NFSv4 state for an inode
2247 *
2248 * Returns NFS_OK if recovery for this stateid is now finished.
2249 * Otherwise a negative NFS4ERR value is returned.
2250 */
2251static int nfs41_check_open_stateid(struct nfs4_state *state)
2252{
2253 struct nfs_server *server = NFS_SERVER(state->inode);
fcb6d9c6 2254 nfs4_stateid *stateid = &state->open_stateid;
ab7cb0df 2255 struct rpc_cred *cred = state->owner->so_cred;
3e60ffdd
CL		 2256 int status;
2257
2258 /* If a state reset has been done, test_stateid is unneeded */
2259 if ((test_bit(NFS_O_RDONLY_STATE, &state->flags) == 0) &&
2260 (test_bit(NFS_O_WRONLY_STATE, &state->flags) == 0) &&
2261 (test_bit(NFS_O_RDWR_STATE, &state->flags) == 0))
2262 return -NFS4ERR_BAD_STATEID;
2263
ab7cb0df 2264 status = nfs41_test_stateid(server, stateid, cred);
08cb47fa 2265 trace_nfs4_test_open_stateid(state, NULL, status);
3e60ffdd
CL		 2266 if (status != NFS_OK) {
2267 /* Free the stateid unless the server explicitly
2268 * informs us the stateid is unrecognized. */
2269 if (status != -NFS4ERR_BAD_STATEID)
ab7cb0df 2270 nfs41_free_stateid(server, stateid, cred);
3e60ffdd
CL		 2271
2272 clear_bit(NFS_O_RDONLY_STATE, &state->flags);
2273 clear_bit(NFS_O_WRONLY_STATE, &state->flags);
2274 clear_bit(NFS_O_RDWR_STATE, &state->flags);
fd068b20 2275 clear_bit(NFS_OPEN_STATE, &state->flags);
b01dd1d8
BS		 2276 }
2277 return status;
2278}
2279
2280static int nfs41_open_expired(struct nfs4_state_owner *sp, struct nfs4_state *state)
2281{
eb64cf96 2282 int status;
b01dd1d8 2283
0c116cad 2284 nfs41_check_delegation_stateid(state);
3e60ffdd 2285 status = nfs41_check_open_stateid(state);
eb64cf96
CL		 2286 if (status != NFS_OK)
2287 status = nfs4_open_expired(sp, state);
2288 return status;
f062eb6c
BS		 2289}
2290#endif
2291
aa53ed54
JL		 2292/*
2293 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
2294 * fields corresponding to attributes that were used to store the verifier.
2295 * Make sure we clobber those fields in the later setattr call
2296 */
2297static inline void nfs4_exclusive_attrset(struct nfs4_opendata *opendata, struct iattr *sattr)
2298{
2299 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_ACCESS) &&
2300 !(sattr->ia_valid & ATTR_ATIME_SET))
2301 sattr->ia_valid |= ATTR_ATIME;
2302
2303 if ((opendata->o_res.attrset[1] & FATTR4_WORD1_TIME_MODIFY) &&
2304 !(sattr->ia_valid & ATTR_MTIME_SET))
2305 sattr->ia_valid |= ATTR_MTIME;
2306}
2307
c21443c2
TM		 2308static int _nfs4_open_and_get_state(struct nfs4_opendata *opendata,
2309 fmode_t fmode,
2310 int flags,
3efb9722 2311 struct nfs_open_context *ctx)
c21443c2
TM		 2312{
2313 struct nfs4_state_owner *sp = opendata->owner;
2314 struct nfs_server *server = sp->so_server;
275bb307 2315 struct dentry *dentry;
c21443c2
TM		 2316 struct nfs4_state *state;
2317 unsigned int seq;
2318 int ret;
2319
2320 seq = raw_seqcount_begin(&sp->so_reclaim_seqcount);
2321
2322 ret = _nfs4_proc_open(opendata);
dca78001 2323 if (ret != 0)
c21443c2
TM		 2324 goto out;
2325
2326 state = nfs4_opendata_to_nfs4_state(opendata);
2327 ret = PTR_ERR(state);
2328 if (IS_ERR(state))
2329 goto out;
2330 if (server->caps & NFS_CAP_POSIX_LOCK)
2331 set_bit(NFS_STATE_POSIX_LOCKS, &state->flags);
2332
275bb307 2333 dentry = opendata->dentry;
2b0143b5 2334 if (d_really_is_negative(dentry)) {
275bb307
TM		 2335 /* FIXME: Is this d_drop() ever needed? */
2336 d_drop(dentry);
2337 dentry = d_add_unique(dentry, igrab(state->inode));
2338 if (dentry == NULL) {
2339 dentry = opendata->dentry;
2340 } else if (dentry != ctx->dentry) {
2341 dput(ctx->dentry);
2342 ctx->dentry = dget(dentry);
2343 }
2344 nfs_set_verifier(dentry,
2b0143b5 2345 nfs_save_change_attribute(d_inode(opendata->dir)));
275bb307
TM		 2346 }
2347
c21443c2
TM		 2348 ret = nfs4_opendata_access(sp->so_cred, opendata, state, fmode, flags);
2349 if (ret != 0)
2350 goto out;
2351
3efb9722 2352 ctx->state = state;
2b0143b5 2353 if (d_inode(dentry) == state->inode) {
c45ffdd2
TM		 2354 nfs_inode_attach_open_context(ctx);
2355 if (read_seqcount_retry(&sp->so_reclaim_seqcount, seq))
2356 nfs4_schedule_stateid_recovery(server, state);
2357 }
c21443c2
TM		 2358out:
2359 return ret;
2360}
2361
1da177e4 2362/*
24ac23ab 2363 * Returns a referenced nfs4_state
1da177e4 2364 */
82be417a 2365static int _nfs4_do_open(struct inode *dir,
4197a055 2366 struct nfs_open_context *ctx,
82be417a
AA		 2367 int flags,
2368 struct iattr *sattr,
5bc2afc2
TM		 2369 struct nfs4_label *label,
2370 int *opened)
1da177e4
LT		 2371{
2372 struct nfs4_state_owner *sp;
2373 struct nfs4_state *state = NULL;
2374 struct nfs_server *server = NFS_SERVER(dir);
e56e0b78 2375 struct nfs4_opendata *opendata;
4197a055
TM		 2376 struct dentry *dentry = ctx->dentry;
2377 struct rpc_cred *cred = ctx->cred;
2378 struct nfs4_threshold **ctx_th = &ctx->mdsthreshold;
2379 fmode_t fmode = ctx->mode & (FMODE_READ|FMODE_WRITE|FMODE_EXEC);
49f9a0fa 2380 enum open_claim_type4 claim = NFS4_OPEN_CLAIM_NULL;
1775fd3e 2381 struct nfs4_label *olabel = NULL;
aac00a8d 2382 int status;
1da177e4
LT		 2383
2384 /* Protect against reboot recovery conflicts */
1da177e4 2385 status = -ENOMEM;
d1e284d5
TM		 2386 sp = nfs4_get_state_owner(server, cred, GFP_KERNEL);
2387 if (sp == NULL) {
1da177e4
LT		 2388 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
2389 goto out_err;
2390 }
58d9714a
TM		 2391 status = nfs4_recover_expired_lease(server);
2392 if (status != 0)
b4454fe1 2393 goto err_put_state_owner;
2b0143b5
DH		 2394 if (d_really_is_positive(dentry))
2395 nfs4_return_incompatible_delegation(d_inode(dentry), fmode);
58d9714a 2396 status = -ENOMEM;
2b0143b5 2397 if (d_really_is_positive(dentry))
49f9a0fa 2398 claim = NFS4_OPEN_CLAIM_FH;
4a1c0893 2399 opendata = nfs4_opendata_alloc(dentry, sp, fmode, flags, sattr,
1775fd3e 2400 label, claim, GFP_KERNEL);
e56e0b78 2401 if (opendata == NULL)
95d35cb4 2402 goto err_put_state_owner;
1da177e4 2403
14c43f76
DQ		 2404 if (label) {
2405 olabel = nfs4_label_alloc(server, GFP_KERNEL);
2406 if (IS_ERR(olabel)) {
2407 status = PTR_ERR(olabel);
2408 goto err_opendata_put;
2409 }
2410 }
2411
e911b815
TM		 2412 if (server->attr_bitmask[2] & FATTR4_WORD2_MDSTHRESHOLD) {
2413 if (!opendata->f_attr.mdsthreshold) {
2414 opendata->f_attr.mdsthreshold = pnfs_mdsthreshold_alloc();
2415 if (!opendata->f_attr.mdsthreshold)
2416 goto err_free_label;
2417 }
1549210f 2418 opendata->o_arg.open_bitmap = &nfs4_pnfs_open_bitmap[0];
82be417a 2419 }
2b0143b5
DH		 2420 if (d_really_is_positive(dentry))
2421 opendata->state = nfs4_get_open_state(d_inode(dentry), sp);
aac00a8d 2422
3efb9722 2423 status = _nfs4_open_and_get_state(opendata, fmode, flags, ctx);
6168f62c 2424 if (status != 0)
14c43f76 2425 goto err_free_label;
3efb9722 2426 state = ctx->state;
6168f62c 2427
efcbc04e 2428 if ((opendata->o_arg.open_flags & (O_CREAT|O_EXCL)) == (O_CREAT|O_EXCL) &&
549b19cc 2429 (opendata->o_arg.createmode != NFS4_CREATE_GUARDED)) {
0ab64e0e
TM		 2430 nfs4_exclusive_attrset(opendata, sattr);
2431
2432 nfs_fattr_init(opendata->o_res.f_attr);
2433 status = nfs4_do_setattr(state->inode, cred,
2434 opendata->o_res.f_attr, sattr,
1775fd3e
DQ		 2435 state, label, olabel);
2436 if (status == 0) {
f044636d
TM		 2437 nfs_setattr_update_inode(state->inode, sattr,
2438 opendata->o_res.f_attr);
aa9c2669 2439 nfs_setsecurity(state->inode, opendata->o_res.f_attr, olabel);
1775fd3e 2440 }
0ab64e0e 2441 }
5bc2afc2
TM		 2442 if (opendata->file_created)
2443 *opened |= FILE_CREATED;
82be417a 2444
e911b815 2445 if (pnfs_use_threshold(ctx_th, opendata->f_attr.mdsthreshold, server)) {
82be417a 2446 *ctx_th = opendata->f_attr.mdsthreshold;
e911b815
TM		 2447 opendata->f_attr.mdsthreshold = NULL;
2448 }
82be417a 2449
14c43f76
DQ		 2450 nfs4_label_free(olabel);
2451
c6d00e63 2452 nfs4_opendata_put(opendata);
1da177e4 2453 nfs4_put_state_owner(sp);
1da177e4 2454 return 0;
14c43f76
DQ		 2455err_free_label:
2456 nfs4_label_free(olabel);
c6d00e63
TM		 2457err_opendata_put:
2458 nfs4_opendata_put(opendata);
e56e0b78
TM		 2459err_put_state_owner:
2460 nfs4_put_state_owner(sp);
1da177e4 2461out_err:
1da177e4
LT		 2462 return status;
2463}
2464
2465
82be417a 2466static struct nfs4_state *nfs4_do_open(struct inode *dir,
4197a055 2467 struct nfs_open_context *ctx,
82be417a
AA		 2468 int flags,
2469 struct iattr *sattr,
5bc2afc2
TM		 2470 struct nfs4_label *label,
2471 int *opened)
1da177e4 2472{
49f9a0fa 2473 struct nfs_server *server = NFS_SERVER(dir);
1da177e4
LT		 2474 struct nfs4_exception exception = { };
2475 struct nfs4_state *res;
2476 int status;
2477
2478 do {
5bc2afc2 2479 status = _nfs4_do_open(dir, ctx, flags, sattr, label, opened);
3efb9722 2480 res = ctx->state;
42113a75 2481 trace_nfs4_open_file(ctx, flags, status);
1da177e4
LT		 2482 if (status == 0)
2483 break;
2484 /* NOTE: BAD_SEQID means the server and client disagree about the
2485 * book-keeping w.r.t. state-changing operations
2486 * (OPEN/CLOSE/LOCK/LOCKU...)
2487 * It is actually a sign of a bug on the client or on the server.
2488 *
2489 * If we receive a BAD_SEQID error in the particular case of
cee54fc9 2490 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1da177e4
LT		 2491 * have unhashed the old state_owner for us, and that we can
2492 * therefore safely retry using a new one. We should still warn
2493 * the user though...
2494 */
2495 if (status == -NFS4ERR_BAD_SEQID) {
9a3ba432 2496 pr_warn_ratelimited("NFS: v4 server %s "
6f43ddcc
TM		 2497 " returned a bad sequence-id error!\n",
2498 NFS_SERVER(dir)->nfs_client->cl_hostname);
1da177e4
LT		 2499 exception.retry = 1;
2500 continue;
2501 }
550f5747
TM		 2502 /*
2503 * BAD_STATEID on OPEN means that the server cancelled our
2504 * state before it received the OPEN_CONFIRM.
2505 * Recover by retrying the request as per the discussion
2506 * on Page 181 of RFC3530.
2507 */
2508 if (status == -NFS4ERR_BAD_STATEID) {
2509 exception.retry = 1;
2510 continue;
2511 }
aac00a8d
TM		 2512 if (status == -EAGAIN) {
2513 /* We must have found a delegation */
2514 exception.retry = 1;
2515 continue;
2516 }
49f9a0fa
TM		 2517 if (nfs4_clear_cap_atomic_open_v1(server, status, &exception))
2518 continue;
2519 res = ERR_PTR(nfs4_handle_exception(server,
1da177e4
LT		 2520 status, &exception));
2521 } while (exception.retry);
2522 return res;
2523}
2524
659bfcd6
TM		 2525static int _nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2526 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2527 struct nfs4_state *state, struct nfs4_label *ilabel,
2528 struct nfs4_label *olabel)
1da177e4 2529{
3e4f6290 2530 struct nfs_server *server = NFS_SERVER(inode);
1da177e4 2531 struct nfs_setattrargs arg = {
3e4f6290 2532 .fh = NFS_FH(inode),
1da177e4
LT		 2533 .iap = sattr,
2534 .server = server,
2535 .bitmask = server->attr_bitmask,
1775fd3e 2536 .label = ilabel,
1da177e4
LT		 2537 };
2538 struct nfs_setattrres res = {
2539 .fattr = fattr,
1775fd3e 2540 .label = olabel,
1da177e4
LT		 2541 .server = server,
2542 };
2543 struct rpc_message msg = {
659bfcd6
TM		 2544 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
2545 .rpc_argp = &arg,
2546 .rpc_resp = &res,
2547 .rpc_cred = cred,
1da177e4 2548 };
26e976a8 2549 unsigned long timestamp = jiffies;
ee3ae84e
TM		 2550 fmode_t fmode;
2551 bool truncate;
65e4308d 2552 int status;
1da177e4 2553
aa9c2669
DQ		 2554 arg.bitmask = nfs4_bitmask(server, ilabel);
2555 if (ilabel)
2556 arg.bitmask = nfs4_bitmask(server, olabel);
2557
0e574af1 2558 nfs_fattr_init(fattr);
1da177e4 2559
ee3ae84e
TM		 2560 /* Servers should only apply open mode checks for file size changes */
2561 truncate = (sattr->ia_valid & ATTR_SIZE) ? true : false;
2562 fmode = truncate ? FMODE_WRITE : FMODE_READ;
2563
2564 if (nfs4_copy_delegation_stateid(&arg.stateid, inode, fmode)) {
2565 /* Use that stateid */
0418dae1 2566 } else if (truncate && state != NULL) {
2a369153
TM		 2567 struct nfs_lockowner lockowner = {
2568 .l_owner = current->files,
2569 .l_pid = current->tgid,
2570 };
0418dae1
TM		 2571 if (!nfs4_valid_open_stateid(state))
2572 return -EBADF;
2573 if (nfs4_select_rw_stateid(&arg.stateid, state, FMODE_WRITE,
2574 &lockowner) == -EIO)
2575 return -EBADF;
08e9eac4 2576 } else
f597c537 2577 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
1da177e4 2578
7c513058 2579 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
26e976a8
TM		 2580 if (status == 0 && state != NULL)
2581 renew_lease(server, timestamp);
65e4308d 2582 return status;
1da177e4
LT		 2583}
2584
659bfcd6
TM		 2585static int nfs4_do_setattr(struct inode *inode, struct rpc_cred *cred,
2586 struct nfs_fattr *fattr, struct iattr *sattr,
1775fd3e
DQ		 2587 struct nfs4_state *state, struct nfs4_label *ilabel,
2588 struct nfs4_label *olabel)
1da177e4 2589{
3e4f6290 2590 struct nfs_server *server = NFS_SERVER(inode);
a1d0b5ee
TM		 2591 struct nfs4_exception exception = {
2592 .state = state,
3114ea7a 2593 .inode = inode,
a1d0b5ee 2594 };
1da177e4
LT		 2595 int err;
2596 do {
1775fd3e 2597 err = _nfs4_do_setattr(inode, cred, fattr, sattr, state, ilabel, olabel);
c1578b76 2598 trace_nfs4_setattr(inode, err);
451146be
TM		 2599 switch (err) {
2600 case -NFS4ERR_OPENMODE:
721ccfb7
TM		 2601 if (!(sattr->ia_valid & ATTR_SIZE)) {
2602 pr_warn_once("NFSv4: server %s is incorrectly "
2603 "applying open mode checks to "
2604 "a SETATTR that is not "
2605 "changing file size.\n",
2606 server->nfs_client->cl_hostname);
2607 }
451146be
TM		 2608 if (state && !(state->state & FMODE_WRITE)) {
2609 err = -EBADF;
2610 if (sattr->ia_valid & ATTR_OPEN)
2611 err = -EACCES;
2612 goto out;
2613 }
2614 }
2615 err = nfs4_handle_exception(server, err, &exception);
1da177e4 2616 } while (exception.retry);
451146be 2617out:
1da177e4
LT		 2618 return err;
2619}
2620
2621struct nfs4_closedata {
2622 struct inode *inode;
2623 struct nfs4_state *state;
2624 struct nfs_closeargs arg;
2625 struct nfs_closeres res;
516a6af6 2626 struct nfs_fattr fattr;
26e976a8 2627 unsigned long timestamp;
f7e8917a
FI		 2628 bool roc;
2629 u32 roc_barrier;
1da177e4
LT		 2630};
2631
963d8fe5 2632static void nfs4_free_closedata(void *data)
9512135d 2633{
963d8fe5
TM		 2634 struct nfs4_closedata *calldata = data;
2635 struct nfs4_state_owner *sp = calldata->state->owner;
643168c2 2636 struct super_block *sb = calldata->state->inode->i_sb;
9512135d 2637
f7e8917a
FI		 2638 if (calldata->roc)
2639 pnfs_roc_release(calldata->state->inode);
9512135d
TM		 2640 nfs4_put_open_state(calldata->state);
2641 nfs_free_seqid(calldata->arg.seqid);
9512135d 2642 nfs4_put_state_owner(sp);
322b2b90 2643 nfs_sb_deactive(sb);
9512135d
TM		 2644 kfree(calldata);
2645}
2646
963d8fe5 2647static void nfs4_close_done(struct rpc_task *task, void *data)
1da177e4 2648{
963d8fe5 2649 struct nfs4_closedata *calldata = data;
1da177e4 2650 struct nfs4_state *state = calldata->state;
1da177e4 2651 struct nfs_server *server = NFS_SERVER(calldata->inode);
412f6c4c 2652 nfs4_stateid *res_stateid = NULL;
1da177e4 2653
a3ca5651 2654 dprintk("%s: begin!\n", __func__);
14516c3a
TM		 2655 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
2656 return;
42113a75 2657 trace_nfs4_close(state, &calldata->arg, &calldata->res, task->tk_status);
1da177e4
LT		 2658 /* hmm. we are done with the inode, and in the process of freeing
2659 * the state_owner. we keep this around to process errors
2660 */
1da177e4
LT		 2661 switch (task->tk_status) {
2662 case 0:
412f6c4c
TM		 2663 res_stateid = &calldata->res.stateid;
2664 if (calldata->arg.fmode == 0 && calldata->roc)
f7e8917a
FI		 2665 pnfs_roc_set_barrier(state->inode,
2666 calldata->roc_barrier);
26e976a8 2667 renew_lease(server, calldata->timestamp);
412f6c4c 2668 break;
69794ad7 2669 case -NFS4ERR_ADMIN_REVOKED:
1da177e4 2670 case -NFS4ERR_STALE_STATEID:
9e33bed5
TM		 2671 case -NFS4ERR_OLD_STATEID:
2672 case -NFS4ERR_BAD_STATEID:
1da177e4 2673 case -NFS4ERR_EXPIRED:
566fcec6 2674 if (!nfs4_stateid_match(&calldata->arg.stateid,
369d6b7f 2675 &state->open_stateid)) {
566fcec6
TM		 2676 rpc_restart_call_prepare(task);
2677 goto out_release;
2678 }
dc0b027d 2679 if (calldata->arg.fmode == 0)
9e33bed5 2680 break;
1da177e4 2681 default:
8478eaa1 2682 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN) {
72211dbe 2683 rpc_restart_call_prepare(task);
69794ad7
TM		 2684 goto out_release;
2685 }
1da177e4 2686 }
412f6c4c 2687 nfs_clear_open_stateid(state, res_stateid, calldata->arg.fmode);
69794ad7 2688out_release:
72211dbe 2689 nfs_release_seqid(calldata->arg.seqid);
516a6af6 2690 nfs_refresh_inode(calldata->inode, calldata->res.fattr);
a3ca5651 2691 dprintk("%s: done, ret = %d!\n", __func__, task->tk_status);
1da177e4
LT		 2692}
2693
4ce70ada 2694static void nfs4_close_prepare(struct rpc_task *task, void *data)
1da177e4 2695{
4ce70ada 2696 struct nfs4_closedata *calldata = data;
9512135d 2697 struct nfs4_state *state = calldata->state;
7fdab069 2698 struct inode *inode = calldata->inode;
aee7af35 2699 bool is_rdonly, is_wronly, is_rdwr;
88069f77 2700 int call_close = 0;
9512135d 2701
a3ca5651 2702 dprintk("%s: begin!\n", __func__);
963d8fe5 2703 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 2704 goto out_wait;
003707c7 2705
88069f77 2706 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_OPEN_DOWNGRADE];
4cecb76f 2707 spin_lock(&state->owner->so_lock);
aee7af35
TM		 2708 is_rdwr = test_bit(NFS_O_RDWR_STATE, &state->flags);
2709 is_rdonly = test_bit(NFS_O_RDONLY_STATE, &state->flags);
2710 is_wronly = test_bit(NFS_O_WRONLY_STATE, &state->flags);
369d6b7f 2711 nfs4_stateid_copy(&calldata->arg.stateid, &state->open_stateid);
003707c7 2712 /* Calculate the change in open mode */
cd9288ff 2713 calldata->arg.fmode = 0;
e7616923 2714 if (state->n_rdwr == 0) {
cd9288ff
TM		 2715 if (state->n_rdonly == 0)
2716 call_close |= is_rdonly;
2717 else if (is_rdonly)
2718 calldata->arg.fmode |= FMODE_READ;
2719 if (state->n_wronly == 0)
2720 call_close |= is_wronly;
2721 else if (is_wronly)
2722 calldata->arg.fmode |= FMODE_WRITE;
2723 } else if (is_rdwr)
2724 calldata->arg.fmode |= FMODE_READ|FMODE_WRITE;
2725
2726 if (calldata->arg.fmode == 0)
2727 call_close |= is_rdwr;
2728
5d422301
TM		 2729 if (!nfs4_valid_open_stateid(state))
2730 call_close = 0;
4cecb76f 2731 spin_unlock(&state->owner->so_lock);
88069f77
TM		 2732
2733 if (!call_close) {
963d8fe5 2734 /* Note: exit _without_ calling nfs4_close_done */
c8da19b9 2735 goto out_no_action;
9512135d 2736 }
88069f77 2737
f7e8917a 2738 if (calldata->arg.fmode == 0) {
88069f77 2739 task->tk_msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE];
4ff376fe
TM		 2740 if (calldata->roc)
2741 pnfs_roc_get_barrier(inode, &calldata->roc_barrier);
f7e8917a 2742 }
6ae37339
TM		 2743 calldata->arg.share_access =
2744 nfs4_map_atomic_open_share(NFS_SERVER(inode),
2745 calldata->arg.fmode, 0);
88069f77 2746
516a6af6 2747 nfs_fattr_init(calldata->res.fattr);
26e976a8 2748 calldata->timestamp = jiffies;
7fdab069 2749 if (nfs4_setup_sequence(NFS_SERVER(inode),
9d12b216
TM		 2750 &calldata->arg.seq_args,
2751 &calldata->res.seq_res,
2240a9e2
TM		 2752 task) != 0)
2753 nfs_release_seqid(calldata->arg.seqid);
a3ca5651 2754 dprintk("%s: done!\n", __func__);
c8da19b9
TM		 2755 return;
2756out_no_action:
2757 task->tk_action = NULL;
2758out_wait:
2759 nfs4_sequence_done(task, &calldata->res.seq_res);
1da177e4
LT		 2760}
2761
963d8fe5 2762static const struct rpc_call_ops nfs4_close_ops = {
4ce70ada 2763 .rpc_call_prepare = nfs4_close_prepare,
963d8fe5
TM		 2764 .rpc_call_done = nfs4_close_done,
2765 .rpc_release = nfs4_free_closedata,
2766};
2767
fe08c546
PT		 2768static bool nfs4_roc(struct inode *inode)
2769{
40dd4b7a 2770 if (!nfs_have_layout(inode))
fe08c546 2771 return false;
fe08c546
PT		 2772 return pnfs_roc(inode);
2773}
2774
1da177e4
LT		 2775/*
2776 * It is possible for data to be read/written from a mem-mapped file
2777 * after the sys_close call (which hits the vfs layer as a flush).
2778 * This means that we can't safely call nfsv4 close on a file until
2779 * the inode is cleared. This in turn means that we are not good
2780 * NFSv4 citizens - we do not indicate to the server to update the file's
2781 * share state even when we are done with one of the three share
2782 * stateid's in the inode.
2783 *
2784 * NOTE: Caller must be holding the sp->so_owner semaphore!
2785 */
1f7977c1 2786int nfs4_do_close(struct nfs4_state *state, gfp_t gfp_mask, int wait)
1da177e4 2787{
4a35bd41 2788 struct nfs_server *server = NFS_SERVER(state->inode);
63f5f796 2789 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
1da177e4 2790 struct nfs4_closedata *calldata;
b39e625b
TM		 2791 struct nfs4_state_owner *sp = state->owner;
2792 struct rpc_task *task;
5138fde0
TM		 2793 struct rpc_message msg = {
2794 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CLOSE],
2795 .rpc_cred = state->owner->so_cred,
2796 };
c970aa85
TM		 2797 struct rpc_task_setup task_setup_data = {
2798 .rpc_client = server->client,
5138fde0 2799 .rpc_message = &msg,
c970aa85 2800 .callback_ops = &nfs4_close_ops,
101070ca 2801 .workqueue = nfsiod_workqueue,
c970aa85
TM		 2802 .flags = RPC_TASK_ASYNC,
2803 };
9512135d 2804 int status = -ENOMEM;
1da177e4 2805
fa940720
WAA		 2806 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_CLEANUP,
2807 &task_setup_data.rpc_client, &msg);
2808
8535b2be 2809 calldata = kzalloc(sizeof(*calldata), gfp_mask);
1da177e4 2810 if (calldata == NULL)
9512135d 2811 goto out;
a9c92d6b 2812 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 1);
4a35bd41 2813 calldata->inode = state->inode;
1da177e4 2814 calldata->state = state;
4a35bd41 2815 calldata->arg.fh = NFS_FH(state->inode);
1da177e4 2816 /* Serialization for the sequence id */
63f5f796
TM		 2817 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
2818 calldata->arg.seqid = alloc_seqid(&state->owner->so_seqid, gfp_mask);
badc76dd 2819 if (IS_ERR(calldata->arg.seqid))
9512135d 2820 goto out_free_calldata;
dc0b027d 2821 calldata->arg.fmode = 0;
a65318bf 2822 calldata->arg.bitmask = server->cache_consistency_bitmask;
516a6af6 2823 calldata->res.fattr = &calldata->fattr;
c1d51931 2824 calldata->res.seqid = calldata->arg.seqid;
516a6af6 2825 calldata->res.server = server;
fe08c546 2826 calldata->roc = nfs4_roc(state->inode);
643168c2 2827 nfs_sb_active(calldata->inode->i_sb);
9512135d 2828
1174dd1f
TM		 2829 msg.rpc_argp = &calldata->arg;
2830 msg.rpc_resp = &calldata->res;
c970aa85
TM		 2831 task_setup_data.callback_data = calldata;
2832 task = rpc_run_task(&task_setup_data);
b39e625b
TM		 2833 if (IS_ERR(task))
2834 return PTR_ERR(task);
a49c3c77
TM		 2835 status = 0;
2836 if (wait)
2837 status = rpc_wait_for_completion_task(task);
b39e625b 2838 rpc_put_task(task);
a49c3c77 2839 return status;
9512135d
TM		 2840out_free_calldata:
2841 kfree(calldata);
2842out:
b39e625b
TM		 2843 nfs4_put_open_state(state);
2844 nfs4_put_state_owner(sp);
9512135d 2845 return status;
1da177e4
LT		 2846}
2847
2b484297 2848static struct inode *
5bc2afc2
TM		 2849nfs4_atomic_open(struct inode *dir, struct nfs_open_context *ctx,
2850 int open_flags, struct iattr *attr, int *opened)
1da177e4 2851{
1da177e4 2852 struct nfs4_state *state;
aa9c2669
DQ		 2853 struct nfs4_label l = {0, 0, 0, NULL}, *label = NULL;
2854
2855 label = nfs4_label_init_security(dir, ctx->dentry, attr, &l);
1da177e4 2856
565277f6 2857 /* Protect against concurrent sillydeletes */
5bc2afc2 2858 state = nfs4_do_open(dir, ctx, open_flags, attr, label, opened);
aa9c2669
DQ		 2859
2860 nfs4_label_release_security(label);
2861
f46e0bd3
TM		 2862 if (IS_ERR(state))
2863 return ERR_CAST(state);
275bb307 2864 return state->inode;
1da177e4
LT		 2865}
2866
1185a552 2867static void nfs4_close_context(struct nfs_open_context *ctx, int is_sync)
7fe5c398
TM		 2868{
2869 if (ctx->state == NULL)
2870 return;
2871 if (is_sync)
643168c2 2872 nfs4_close_sync(ctx->state, ctx->mode);
7fe5c398 2873 else
643168c2 2874 nfs4_close_state(ctx->state, ctx->mode);
7fe5c398 2875}
1da177e4 2876
b944dba3
TM		 2877#define FATTR4_WORD1_NFS40_MASK (2*FATTR4_WORD1_MOUNTED_ON_FILEID - 1UL)
2878#define FATTR4_WORD2_NFS41_MASK (2*FATTR4_WORD2_SUPPATTR_EXCLCREAT - 1UL)
999e5683 2879#define FATTR4_WORD2_NFS42_MASK (2*FATTR4_WORD2_SECURITY_LABEL - 1UL)
b944dba3 2880
1da177e4
LT		 2881static int _nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
2882{
43652ad5
BH		 2883 struct nfs4_server_caps_arg args = {
2884 .fhandle = fhandle,
2885 };
1da177e4
LT		 2886 struct nfs4_server_caps_res res = {};
2887 struct rpc_message msg = {
2888 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SERVER_CAPS],
43652ad5 2889 .rpc_argp = &args,
1da177e4
LT		 2890 .rpc_resp = &res,
2891 };
2892 int status;
2893
7c513058 2894 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 2895 if (status == 0) {
b944dba3
TM		 2896 /* Sanity check the server answers */
2897 switch (server->nfs_client->cl_minorversion) {
2898 case 0:
2899 res.attr_bitmask[1] &= FATTR4_WORD1_NFS40_MASK;
2900 res.attr_bitmask[2] = 0;
2901 break;
2902 case 1:
2903 res.attr_bitmask[2] &= FATTR4_WORD2_NFS41_MASK;
2904 break;
2905 case 2:
2906 res.attr_bitmask[2] &= FATTR4_WORD2_NFS42_MASK;
2907 }
1da177e4 2908 memcpy(server->attr_bitmask, res.attr_bitmask, sizeof(server->attr_bitmask));
62ab460c
TM		 2909 server->caps &= ~(NFS_CAP_ACLS|NFS_CAP_HARDLINKS|
2910 NFS_CAP_SYMLINKS|NFS_CAP_FILEID|
2911 NFS_CAP_MODE|NFS_CAP_NLINK|NFS_CAP_OWNER|
2912 NFS_CAP_OWNER_GROUP|NFS_CAP_ATIME|
b944dba3
TM		 2913 NFS_CAP_CTIME|NFS_CAP_MTIME|
2914 NFS_CAP_SECURITY_LABEL);
7dd7d959
MN		 2915 if (res.attr_bitmask[0] & FATTR4_WORD0_ACL &&
2916 res.acl_bitmask & ACL4_SUPPORT_ALLOW_ACL)
1da177e4
LT		 2917 server->caps |= NFS_CAP_ACLS;
2918 if (res.has_links != 0)
2919 server->caps |= NFS_CAP_HARDLINKS;
2920 if (res.has_symlinks != 0)
2921 server->caps |= NFS_CAP_SYMLINKS;
62ab460c
TM		 2922 if (res.attr_bitmask[0] & FATTR4_WORD0_FILEID)
2923 server->caps |= NFS_CAP_FILEID;
2924 if (res.attr_bitmask[1] & FATTR4_WORD1_MODE)
2925 server->caps |= NFS_CAP_MODE;
2926 if (res.attr_bitmask[1] & FATTR4_WORD1_NUMLINKS)
2927 server->caps |= NFS_CAP_NLINK;
2928 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER)
2929 server->caps |= NFS_CAP_OWNER;
2930 if (res.attr_bitmask[1] & FATTR4_WORD1_OWNER_GROUP)
2931 server->caps |= NFS_CAP_OWNER_GROUP;
2932 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_ACCESS)
2933 server->caps |= NFS_CAP_ATIME;
2934 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_METADATA)
2935 server->caps |= NFS_CAP_CTIME;
2936 if (res.attr_bitmask[1] & FATTR4_WORD1_TIME_MODIFY)
2937 server->caps |= NFS_CAP_MTIME;
aa9c2669
DQ		 2938#ifdef CONFIG_NFS_V4_SECURITY_LABEL
2939 if (res.attr_bitmask[2] & FATTR4_WORD2_SECURITY_LABEL)
2940 server->caps |= NFS_CAP_SECURITY_LABEL;
2941#endif
2942 memcpy(server->attr_bitmask_nl, res.attr_bitmask,
2943 sizeof(server->attr_bitmask));
b944dba3 2944 server->attr_bitmask_nl[2] &= ~FATTR4_WORD2_SECURITY_LABEL;
62ab460c 2945
a65318bf
TM		 2946 memcpy(server->cache_consistency_bitmask, res.attr_bitmask, sizeof(server->cache_consistency_bitmask));
2947 server->cache_consistency_bitmask[0] &= FATTR4_WORD0_CHANGE|FATTR4_WORD0_SIZE;
2948 server->cache_consistency_bitmask[1] &= FATTR4_WORD1_TIME_METADATA|FATTR4_WORD1_TIME_MODIFY;
b944dba3 2949 server->cache_consistency_bitmask[2] = 0;
1da177e4 2950 server->acl_bitmask = res.acl_bitmask;
264e6351 2951 server->fh_expire_type = res.fh_expire_type;
1da177e4 2952 }
cccef3b9 2953
1da177e4
LT		 2954 return status;
2955}
2956
55a97593 2957int nfs4_server_capabilities(struct nfs_server *server, struct nfs_fh *fhandle)
1da177e4
LT		 2958{
2959 struct nfs4_exception exception = { };
2960 int err;
2961 do {
2962 err = nfs4_handle_exception(server,
2963 _nfs4_server_capabilities(server, fhandle),
2964 &exception);
2965 } while (exception.retry);
2966 return err;
2967}
2968
2969static int _nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2970 struct nfs_fsinfo *info)
2971{
aa9c2669 2972 u32 bitmask[3];
1da177e4 2973 struct nfs4_lookup_root_arg args = {
aa9c2669 2974 .bitmask = bitmask,
1da177e4
LT		 2975 };
2976 struct nfs4_lookup_res res = {
2977 .server = server,
0e574af1 2978 .fattr = info->fattr,
1da177e4
LT		 2979 .fh = fhandle,
2980 };
2981 struct rpc_message msg = {
2982 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP_ROOT],
2983 .rpc_argp = &args,
2984 .rpc_resp = &res,
2985 };
008f55d0 2986
aa9c2669
DQ		 2987 bitmask[0] = nfs4_fattr_bitmap[0];
2988 bitmask[1] = nfs4_fattr_bitmap[1];
2989 /*
2990 * Process the label in the upcoming getfattr
2991 */
2992 bitmask[2] = nfs4_fattr_bitmap[2] & ~FATTR4_WORD2_SECURITY_LABEL;
2993
0e574af1 2994 nfs_fattr_init(info->fattr);
7c513058 2995 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 2996}
2997
2998static int nfs4_lookup_root(struct nfs_server *server, struct nfs_fh *fhandle,
2999 struct nfs_fsinfo *info)
3000{
3001 struct nfs4_exception exception = { };
3002 int err;
3003 do {
fb8a5ba8 3004 err = _nfs4_lookup_root(server, fhandle, info);
b5f875a9 3005 trace_nfs4_lookup_root(server, fhandle, info->fattr, err);
fb8a5ba8
BS		 3006 switch (err) {
3007 case 0:
3008 case -NFS4ERR_WRONGSEC:
05e9cfb4 3009 goto out;
fb8a5ba8
BS		 3010 default:
3011 err = nfs4_handle_exception(server, err, &exception);
3012 }
1da177e4 3013 } while (exception.retry);
05e9cfb4 3014out:
1da177e4
LT		 3015 return err;
3016}
3017
8f70e95f
BS		 3018static int nfs4_lookup_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
3019 struct nfs_fsinfo *info, rpc_authflavor_t flavor)
3020{
c2190661
TM		 3021 struct rpc_auth_create_args auth_args = {
3022 .pseudoflavor = flavor,
3023 };
8f70e95f
BS		 3024 struct rpc_auth *auth;
3025 int ret;
3026
c2190661 3027 auth = rpcauth_create(&auth_args, server->client);
e8d920c5 3028 if (IS_ERR(auth)) {
75bc8821 3029 ret = -EACCES;
8f70e95f
BS		 3030 goto out;
3031 }
3032 ret = nfs4_lookup_root(server, fhandle, info);
8f70e95f
BS		 3033out:
3034 return ret;
3035}
3036
9a744ba3
CL		 3037/*
3038 * Retry pseudoroot lookup with various security flavors. We do this when:
3039 *
3040 * NFSv4.0: the PUTROOTFH operation returns NFS4ERR_WRONGSEC
3041 * NFSv4.1: the server does not support the SECINFO_NO_NAME operation
3042 *
3043 * Returns zero on success, or a negative NFS4ERR value, or a
3044 * negative errno value.
3045 */
801a16dc 3046static int nfs4_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
54ceac45 3047 struct nfs_fsinfo *info)
1da177e4 3048{
9a744ba3
CL		 3049 /* Per 3530bis 15.33.5 */
3050 static const rpc_authflavor_t flav_array[] = {
3051 RPC_AUTH_GSS_KRB5P,
3052 RPC_AUTH_GSS_KRB5I,
3053 RPC_AUTH_GSS_KRB5,
c4eafe11 3054 RPC_AUTH_UNIX, /* courtesy */
9a744ba3
CL		 3055 RPC_AUTH_NULL,
3056 };
3057 int status = -EPERM;
3058 size_t i;
6a1a1e34 3059
4d4b69dd
WAA		 3060 if (server->auth_info.flavor_len > 0) {
3061 /* try each flavor specified by user */
3062 for (i = 0; i < server->auth_info.flavor_len; i++) {
3063 status = nfs4_lookup_root_sec(server, fhandle, info,
3064 server->auth_info.flavors[i]);
3065 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3066 continue;
3067 break;
3068 }
3069 } else {
3070 /* no flavors specified by user, try default list */
3071 for (i = 0; i < ARRAY_SIZE(flav_array); i++) {
3072 status = nfs4_lookup_root_sec(server, fhandle, info,
3073 flav_array[i]);
3074 if (status == -NFS4ERR_WRONGSEC || status == -EACCES)
3075 continue;
3076 break;
3077 }
8f70e95f 3078 }
9a744ba3 3079
fb8a5ba8
BS		 3080 /*
3081 * -EACCESS could mean that the user doesn't have correct permissions
3082 * to access the mount. It could also mean that we tried to mount
3083 * with a gss auth flavor, but rpc.gssd isn't running. Either way,
3084 * existing mount programs don't handle -EACCES very well so it should
3085 * be mapped to -EPERM instead.
3086 */
3087 if (status == -EACCES)
3088 status = -EPERM;
801a16dc
BS		 3089 return status;
3090}
3091
2ed4b95b
CL		 3092static int nfs4_do_find_root_sec(struct nfs_server *server,
3093 struct nfs_fh *fhandle, struct nfs_fsinfo *info)
3094{
3095 int mv = server->nfs_client->cl_minorversion;
3096 return nfs_v4_minor_ops[mv]->find_root_sec(server, fhandle, info);
3097}
3098
3099/**
3100 * nfs4_proc_get_rootfh - get file handle for server's pseudoroot
3101 * @server: initialized nfs_server handle
3102 * @fhandle: we fill in the pseudo-fs root file handle
3103 * @info: we fill in an FSINFO struct
5e6b1990 3104 * @auth_probe: probe the auth flavours
2ed4b95b
CL		 3105 *
3106 * Returns zero on success, or a negative errno.
801a16dc 3107 */
3028eb2b 3108int nfs4_proc_get_rootfh(struct nfs_server *server, struct nfs_fh *fhandle,
5e6b1990
TM		 3109 struct nfs_fsinfo *info,
3110 bool auth_probe)
801a16dc 3111{
c7757074 3112 int status = 0;
2ed4b95b 3113
c7757074 3114 if (!auth_probe)
5e6b1990 3115 status = nfs4_lookup_root(server, fhandle, info);
c7757074
AP		 3116
3117 if (auth_probe || status == NFS4ERR_WRONGSEC)
2ed4b95b
CL		 3118 status = nfs4_do_find_root_sec(server, fhandle, info);
3119
1da177e4
LT		 3120 if (status == 0)
3121 status = nfs4_server_capabilities(server, fhandle);
3122 if (status == 0)
3123 status = nfs4_do_fsinfo(server, fhandle, info);
2ed4b95b 3124
c12e87f4 3125 return nfs4_map_errors(status);
1da177e4
LT		 3126}
3127
bae36241
BS		 3128static int nfs4_proc_get_root(struct nfs_server *server, struct nfs_fh *mntfh,
3129 struct nfs_fsinfo *info)
3130{
3131 int error;
3132 struct nfs_fattr *fattr = info->fattr;
1775fd3e 3133 struct nfs4_label *label = NULL;
bae36241
BS		 3134
3135 error = nfs4_server_capabilities(server, mntfh);
3136 if (error < 0) {
3137 dprintk("nfs4_get_root: getcaps error = %d\n", -error);
3138 return error;
3139 }
3140
14c43f76
DQ		 3141 label = nfs4_label_alloc(server, GFP_KERNEL);
3142 if (IS_ERR(label))
3143 return PTR_ERR(label);
3144
1775fd3e 3145 error = nfs4_proc_getattr(server, mntfh, fattr, label);
bae36241
BS		 3146 if (error < 0) {
3147 dprintk("nfs4_get_root: getattr error = %d\n", -error);
14c43f76 3148 goto err_free_label;
bae36241
BS		 3149 }
3150
3151 if (fattr->valid & NFS_ATTR_FATTR_FSID &&
3152 !nfs_fsid_equal(&server->fsid, &fattr->fsid))
3153 memcpy(&server->fsid, &fattr->fsid, sizeof(server->fsid));
3154
14c43f76
DQ		 3155err_free_label:
3156 nfs4_label_free(label);
3157
bae36241
BS		 3158 return error;
3159}
3160
6b97fd3d
MN		 3161/*
3162 * Get locations and (maybe) other attributes of a referral.
3163 * Note that we'll actually follow the referral later when
3164 * we detect fsid mismatch in inode revalidation
3165 */
f05d147f
BS		 3166static int nfs4_get_referral(struct rpc_clnt *client, struct inode *dir,
3167 const struct qstr *name, struct nfs_fattr *fattr,
3168 struct nfs_fh *fhandle)
6b97fd3d
MN		 3169{
3170 int status = -ENOMEM;
3171 struct page *page = NULL;
3172 struct nfs4_fs_locations *locations = NULL;
6b97fd3d
MN		 3173
3174 page = alloc_page(GFP_KERNEL);
3175 if (page == NULL)
3176 goto out;
3177 locations = kmalloc(sizeof(struct nfs4_fs_locations), GFP_KERNEL);
3178 if (locations == NULL)
3179 goto out;
3180
f05d147f 3181 status = nfs4_proc_fs_locations(client, dir, name, locations, page);
6b97fd3d
MN		 3182 if (status != 0)
3183 goto out;
519ae255
CL		 3184
3185 /*
3186 * If the fsid didn't change, this is a migration event, not a
3187 * referral. Cause us to drop into the exception handler, which
3188 * will kick off migration recovery.
3189 */
6b97fd3d 3190 if (nfs_fsid_equal(&NFS_SERVER(dir)->fsid, &locations->fattr.fsid)) {
533eb461
AA		 3191 dprintk("%s: server did not return a different fsid for"
3192 " a referral at %s\n", __func__, name->name);
519ae255 3193 status = -NFS4ERR_MOVED;
6b97fd3d
MN		 3194 goto out;
3195 }
533eb461
AA		 3196 /* Fixup attributes for the nfs_lookup() call to nfs_fhget() */
3197 nfs_fixup_referral_attributes(&locations->fattr);
6b97fd3d 3198
533eb461 3199 /* replace the lookup nfs_fattr with the locations nfs_fattr */
6b97fd3d 3200 memcpy(fattr, &locations->fattr, sizeof(struct nfs_fattr));
6b97fd3d
MN		 3201 memset(fhandle, 0, sizeof(struct nfs_fh));
3202out:
3203 if (page)
3204 __free_page(page);
5d7ca35a 3205 kfree(locations);
6b97fd3d
MN		 3206 return status;
3207}
3208
1775fd3e
DQ		 3209static int _nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3210 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3211{
3212 struct nfs4_getattr_arg args = {
3213 .fh = fhandle,
3214 .bitmask = server->attr_bitmask,
3215 };
3216 struct nfs4_getattr_res res = {
3217 .fattr = fattr,
1775fd3e 3218 .label = label,
1da177e4
LT		 3219 .server = server,
3220 };
3221 struct rpc_message msg = {
3222 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
3223 .rpc_argp = &args,
3224 .rpc_resp = &res,
3225 };
aa9c2669
DQ		 3226
3227 args.bitmask = nfs4_bitmask(server, label);
3228
0e574af1 3229 nfs_fattr_init(fattr);
7c513058 3230 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3231}
3232
1775fd3e
DQ		 3233static int nfs4_proc_getattr(struct nfs_server *server, struct nfs_fh *fhandle,
3234 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3235{
3236 struct nfs4_exception exception = { };
3237 int err;
3238 do {
b5f875a9
TM		 3239 err = _nfs4_proc_getattr(server, fhandle, fattr, label);
3240 trace_nfs4_getattr(server, fhandle, fattr, err);
3241 err = nfs4_handle_exception(server, err,
1da177e4
LT		 3242 &exception);
3243 } while (exception.retry);
3244 return err;
3245}
3246
3247/*
3248 * The file is not closed if it is opened due to the a request to change
3249 * the size of the file. The open call will not be needed once the
3250 * VFS layer lookup-intents are implemented.
3251 *
3252 * Close is called when the inode is destroyed.
3253 * If we haven't opened the file for O_WRONLY, we
3254 * need to in the size_change case to obtain a stateid.
3255 *
3256 * Got race?
3257 * Because OPEN is always done by name in nfsv4, it is
3258 * possible that we opened a different file by the same
3259 * name. We can recognize this race condition, but we
3260 * can't do anything about it besides returning an error.
3261 *
3262 * This will be fixed with VFS changes (lookup-intent).
3263 */
3264static int
3265nfs4_proc_setattr(struct dentry *dentry, struct nfs_fattr *fattr,
3266 struct iattr *sattr)
3267{
2b0143b5 3268 struct inode *inode = d_inode(dentry);
659bfcd6 3269 struct rpc_cred *cred = NULL;
d530838b 3270 struct nfs4_state *state = NULL;
14c43f76 3271 struct nfs4_label *label = NULL;
1da177e4
LT		 3272 int status;
3273
88ac815c
PT		 3274 if (pnfs_ld_layoutret_on_setattr(inode) &&
3275 sattr->ia_valid & ATTR_SIZE &&
3276 sattr->ia_size < i_size_read(inode))
24028672 3277 pnfs_commit_and_return_layout(inode);
8a1636c4 3278
0e574af1 3279 nfs_fattr_init(fattr);
1da177e4 3280
2669940d
AA		 3281 /* Deal with open(O_TRUNC) */
3282 if (sattr->ia_valid & ATTR_OPEN)
cc7936f9 3283 sattr->ia_valid &= ~(ATTR_MTIME|ATTR_CTIME);
2669940d
AA		 3284
3285 /* Optimization: if the end result is no change, don't RPC */
cc7936f9 3286 if ((sattr->ia_valid & ~(ATTR_FILE|ATTR_OPEN)) == 0)
2669940d
AA		 3287 return 0;
3288
d530838b 3289 /* Search for an existing open(O_WRITE) file */
659bfcd6
TM		 3290 if (sattr->ia_valid & ATTR_FILE) {
3291 struct nfs_open_context *ctx;
3292
3293 ctx = nfs_file_open_context(sattr->ia_file);
504e5189
NB		 3294 if (ctx) {
3295 cred = ctx->cred;
3296 state = ctx->state;
3297 }
659bfcd6 3298 }
08e9eac4 3299
14c43f76
DQ		 3300 label = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
3301 if (IS_ERR(label))
3302 return PTR_ERR(label);
3303
3304 status = nfs4_do_setattr(inode, cred, fattr, sattr, state, NULL, label);
aa9c2669 3305 if (status == 0) {
f044636d 3306 nfs_setattr_update_inode(inode, sattr, fattr);
aa9c2669
DQ		 3307 nfs_setsecurity(inode, fattr, label);
3308 }
14c43f76 3309 nfs4_label_free(label);
1da177e4
LT		 3310 return status;
3311}
3312
0c2e53f1
TM		 3313static int _nfs4_proc_lookup(struct rpc_clnt *clnt, struct inode *dir,
3314 const struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3315 struct nfs_fattr *fattr, struct nfs4_label *label)
2b3de441 3316{
0c2e53f1 3317 struct nfs_server *server = NFS_SERVER(dir);
2b3de441
DH		 3318 int status;
3319 struct nfs4_lookup_arg args = {
3320 .bitmask = server->attr_bitmask,
0c2e53f1 3321 .dir_fh = NFS_FH(dir),
2b3de441
DH		 3322 .name = name,
3323 };
3324 struct nfs4_lookup_res res = {
3325 .server = server,
3326 .fattr = fattr,
aa9c2669 3327 .label = label,
2b3de441
DH		 3328 .fh = fhandle,
3329 };
3330 struct rpc_message msg = {
3331 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOOKUP],
3332 .rpc_argp = &args,
3333 .rpc_resp = &res,
3334 };
3335
aa9c2669
DQ		 3336 args.bitmask = nfs4_bitmask(server, label);
3337
2b3de441
DH		 3338 nfs_fattr_init(fattr);
3339
1da177e4 3340 dprintk("NFS call lookup %s\n", name->name);
0c2e53f1 3341 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3342 dprintk("NFS reply lookup: %d\n", status);
3343 return status;
3344}
3345
72de53ec 3346static void nfs_fixup_secinfo_attributes(struct nfs_fattr *fattr)
7ebb9315 3347{
7ebb9315 3348 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
72de53ec 3349 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_MOUNTPOINT;
7ebb9315
BS		 3350 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
3351 fattr->nlink = 2;
3352}
3353
72de53ec
BS		 3354static int nfs4_proc_lookup_common(struct rpc_clnt **clnt, struct inode *dir,
3355 struct qstr *name, struct nfs_fh *fhandle,
1775fd3e 3356 struct nfs_fattr *fattr, struct nfs4_label *label)
1da177e4
LT		 3357{
3358 struct nfs4_exception exception = { };
72de53ec 3359 struct rpc_clnt *client = *clnt;
1da177e4
LT		 3360 int err;
3361 do {
1775fd3e 3362 err = _nfs4_proc_lookup(client, dir, name, fhandle, fattr, label);
078ea3df 3363 trace_nfs4_lookup(dir, name, err);
72de53ec 3364 switch (err) {
08ef7bd3 3365 case -NFS4ERR_BADNAME:
72de53ec
BS		 3366 err = -ENOENT;
3367 goto out;
0c2e53f1 3368 case -NFS4ERR_MOVED:
f05d147f 3369 err = nfs4_get_referral(client, dir, name, fattr, fhandle);
c86c90c6
DM		 3370 if (err == -NFS4ERR_MOVED)
3371 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
72de53ec 3372 goto out;
0c2e53f1 3373 case -NFS4ERR_WRONGSEC:
72de53ec
BS		 3374 err = -EPERM;
3375 if (client != *clnt)
3376 goto out;
66b06860 3377 client = nfs4_negotiate_security(client, dir, name);
72de53ec
BS		 3378 if (IS_ERR(client))
3379 return PTR_ERR(client);
3380
3381 exception.retry = 1;
3382 break;
3383 default:
3384 err = nfs4_handle_exception(NFS_SERVER(dir), err, &exception);
0c2e53f1 3385 }
1da177e4 3386 } while (exception.retry);
72de53ec
BS		 3387
3388out:
3389 if (err == 0)
3390 *clnt = client;
3391 else if (client != *clnt)
3392 rpc_shutdown_client(client);
3393
1da177e4
LT		 3394 return err;
3395}
3396
80a16b21 3397static int nfs4_proc_lookup(struct inode *dir, struct qstr *name,
1775fd3e
DQ		 3398 struct nfs_fh *fhandle, struct nfs_fattr *fattr,
3399 struct nfs4_label *label)
72de53ec
BS		 3400{
3401 int status;
3402 struct rpc_clnt *client = NFS_CLIENT(dir);
3403
1775fd3e 3404 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, label);
72de53ec
BS		 3405 if (client != NFS_CLIENT(dir)) {
3406 rpc_shutdown_client(client);
3407 nfs_fixup_secinfo_attributes(fattr);
3408 }
3409 return status;
3410}
3411
f05d147f
BS		 3412struct rpc_clnt *
3413nfs4_proc_lookup_mountpoint(struct inode *dir, struct qstr *name,
3414 struct nfs_fh *fhandle, struct nfs_fattr *fattr)
3415{
b72888cb 3416 struct rpc_clnt *client = NFS_CLIENT(dir);
f05d147f 3417 int status;
f05d147f 3418
1775fd3e 3419 status = nfs4_proc_lookup_common(&client, dir, name, fhandle, fattr, NULL);
b72888cb 3420 if (status < 0)
f05d147f 3421 return ERR_PTR(status);
b72888cb 3422 return (client == NFS_CLIENT(dir)) ? rpc_clone_client(client) : client;
f05d147f
BS		 3423}
3424
1da177e4
LT		 3425static int _nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3426{
76b32999 3427 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3428 struct nfs4_accessargs args = {
3429 .fh = NFS_FH(inode),
a4980e78 3430 .bitmask = server->cache_consistency_bitmask,
76b32999
TM		 3431 };
3432 struct nfs4_accessres res = {
3433 .server = server,
1da177e4 3434 };
1da177e4
LT		 3435 struct rpc_message msg = {
3436 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_ACCESS],
3437 .rpc_argp = &args,
3438 .rpc_resp = &res,
3439 .rpc_cred = entry->cred,
3440 };
3441 int mode = entry->mask;
aa9c2669 3442 int status = 0;
1da177e4
LT		 3443
3444 /*
3445 * Determine which access bits we want to ask for...
3446 */
3447 if (mode & MAY_READ)
3448 args.access |= NFS4_ACCESS_READ;
3449 if (S_ISDIR(inode->i_mode)) {
3450 if (mode & MAY_WRITE)
3451 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND | NFS4_ACCESS_DELETE;
3452 if (mode & MAY_EXEC)
3453 args.access |= NFS4_ACCESS_LOOKUP;
3454 } else {
3455 if (mode & MAY_WRITE)
3456 args.access |= NFS4_ACCESS_MODIFY | NFS4_ACCESS_EXTEND;
3457 if (mode & MAY_EXEC)
3458 args.access |= NFS4_ACCESS_EXECUTE;
3459 }
c407d41a
TM		 3460
3461 res.fattr = nfs_alloc_fattr();
3462 if (res.fattr == NULL)
3463 return -ENOMEM;
3464
7c513058 3465 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4 3466 if (!status) {
6168f62c 3467 nfs_access_set_mask(entry, res.access);
c407d41a 3468 nfs_refresh_inode(inode, res.fattr);
1da177e4 3469 }
c407d41a 3470 nfs_free_fattr(res.fattr);
1da177e4
LT		 3471 return status;
3472}
3473
3474static int nfs4_proc_access(struct inode *inode, struct nfs_access_entry *entry)
3475{
3476 struct nfs4_exception exception = { };
3477 int err;
3478 do {
c1578b76
TM		 3479 err = _nfs4_proc_access(inode, entry);
3480 trace_nfs4_access(inode, err);
3481 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3482 &exception);
3483 } while (exception.retry);
3484 return err;
3485}
3486
3487/*
3488 * TODO: For the time being, we don't try to get any attributes
3489 * along with any of the zero-copy operations READ, READDIR,
3490 * READLINK, WRITE.
3491 *
3492 * In the case of the first three, we want to put the GETATTR
3493 * after the read-type operation -- this is because it is hard
3494 * to predict the length of a GETATTR response in v4, and thus
3495 * align the READ data correctly. This means that the GETATTR
3496 * may end up partially falling into the page cache, and we should
3497 * shift it into the 'tail' of the xdr_buf before processing.
3498 * To do this efficiently, we need to know the total length
3499 * of data received, which doesn't seem to be available outside
3500 * of the RPC layer.
3501 *
3502 * In the case of WRITE, we also want to put the GETATTR after
3503 * the operation -- in this case because we want to make sure
140150db 3504 * we get the post-operation mtime and size.
1da177e4
LT		 3505 *
3506 * Both of these changes to the XDR layer would in fact be quite
3507 * minor, but I decided to leave them for a subsequent patch.
3508 */
3509static int _nfs4_proc_readlink(struct inode *inode, struct page *page,
3510 unsigned int pgbase, unsigned int pglen)
3511{
3512 struct nfs4_readlink args = {
3513 .fh = NFS_FH(inode),
3514 .pgbase = pgbase,
3515 .pglen = pglen,
3516 .pages = &page,
3517 };
f50c7000 3518 struct nfs4_readlink_res res;
1da177e4
LT		 3519 struct rpc_message msg = {
3520 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READLINK],
3521 .rpc_argp = &args,
f50c7000 3522 .rpc_resp = &res,
1da177e4
LT		 3523 };
3524
7c513058 3525 return nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode), &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 3526}
3527
3528static int nfs4_proc_readlink(struct inode *inode, struct page *page,
3529 unsigned int pgbase, unsigned int pglen)
3530{
3531 struct nfs4_exception exception = { };
3532 int err;
3533 do {
c1578b76
TM		 3534 err = _nfs4_proc_readlink(inode, page, pgbase, pglen);
3535 trace_nfs4_readlink(inode, err);
3536 err = nfs4_handle_exception(NFS_SERVER(inode), err,
1da177e4
LT		 3537 &exception);
3538 } while (exception.retry);
3539 return err;
3540}
3541
1da177e4 3542/*
8867fe58 3543 * This is just for mknod. open(O_CREAT) will always do ->open_context().
1da177e4 3544 */
1da177e4
LT		 3545static int
3546nfs4_proc_create(struct inode *dir, struct dentry *dentry, struct iattr *sattr,
8867fe58 3547 int flags)
1da177e4 3548{
aa9c2669 3549 struct nfs4_label l, *ilabel = NULL;
8867fe58 3550 struct nfs_open_context *ctx;
1da177e4 3551 struct nfs4_state *state;
5bc2afc2 3552 int opened = 0;
1da177e4
LT		 3553 int status = 0;
3554
8867fe58
MS		 3555 ctx = alloc_nfs_open_context(dentry, FMODE_READ);
3556 if (IS_ERR(ctx))
3557 return PTR_ERR(ctx);
3558
aa9c2669
DQ		 3559 ilabel = nfs4_label_init_security(dir, dentry, sattr, &l);
3560
a8a5da99 3561 sattr->ia_mode &= ~current_umask();
5bc2afc2 3562 state = nfs4_do_open(dir, ctx, flags, sattr, ilabel, &opened);
1da177e4
LT		 3563 if (IS_ERR(state)) {
3564 status = PTR_ERR(state);
c0204fd2 3565 goto out;
1da177e4 3566 }
1da177e4 3567out:
aa9c2669 3568 nfs4_label_release_security(ilabel);
8867fe58 3569 put_nfs_open_context(ctx);
1da177e4
LT		 3570 return status;
3571}
3572
3573static int _nfs4_proc_remove(struct inode *dir, struct qstr *name)
3574{
16e42959 3575 struct nfs_server *server = NFS_SERVER(dir);
4fdc17b2 3576 struct nfs_removeargs args = {
1da177e4 3577 .fh = NFS_FH(dir),
26fe5750 3578 .name = *name,
16e42959 3579 };
4fdc17b2 3580 struct nfs_removeres res = {
16e42959 3581 .server = server,
1da177e4 3582 };
1da177e4 3583 struct rpc_message msg = {
4fdc17b2
TM		 3584 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE],
3585 .rpc_argp = &args,
3586 .rpc_resp = &res,
1da177e4 3587 };
778d2817 3588 int status;
1da177e4 3589
7c513058 3590 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 1);
778d2817 3591 if (status == 0)
16e42959 3592 update_changeattr(dir, &res.cinfo);
1da177e4
LT		 3593 return status;
3594}
3595
3596static int nfs4_proc_remove(struct inode *dir, struct qstr *name)
3597{
3598 struct nfs4_exception exception = { };
3599 int err;
3600 do {
078ea3df
TM		 3601 err = _nfs4_proc_remove(dir, name);
3602 trace_nfs4_remove(dir, name, err);
3603 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3604 &exception);
3605 } while (exception.retry);
3606 return err;
3607}
3608
e4eff1a6 3609static void nfs4_proc_unlink_setup(struct rpc_message *msg, struct inode *dir)
1da177e4 3610{
e4eff1a6
TM		 3611 struct nfs_server *server = NFS_SERVER(dir);
3612 struct nfs_removeargs *args = msg->rpc_argp;
3613 struct nfs_removeres *res = msg->rpc_resp;
1da177e4 3614
e4eff1a6 3615 res->server = server;
1da177e4 3616 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_REMOVE];
a9c92d6b 3617 nfs4_init_sequence(&args->seq_args, &res->seq_res, 1);
aa9c2669
DQ		 3618
3619 nfs_fattr_init(res->dir_attr);
1da177e4
LT		 3620}
3621
34e137cc
BS		 3622static void nfs4_proc_unlink_rpc_prepare(struct rpc_task *task, struct nfs_unlinkdata *data)
3623{
d9afbd1b
TM		 3624 nfs4_setup_sequence(NFS_SERVER(data->dir),
3625 &data->args.seq_args,
3626 &data->res.seq_res,
3627 task);
1da177e4
LT		 3628}
3629
e4eff1a6 3630static int nfs4_proc_unlink_done(struct rpc_task *task, struct inode *dir)
1da177e4 3631{
078ea3df
TM		 3632 struct nfs_unlinkdata *data = task->tk_calldata;
3633 struct nfs_removeres *res = &data->res;
e4eff1a6 3634
14516c3a
TM		 3635 if (!nfs4_sequence_done(task, &res->seq_res))
3636 return 0;
8478eaa1
N		 3637 if (nfs4_async_handle_error(task, res->server, NULL,
3638 &data->timeout) == -EAGAIN)
e4eff1a6
TM		 3639 return 0;
3640 update_changeattr(dir, &res->cinfo);
e4eff1a6 3641 return 1;
1da177e4
LT		 3642}
3643
d3d4152a
JL		 3644static void nfs4_proc_rename_setup(struct rpc_message *msg, struct inode *dir)
3645{
3646 struct nfs_server *server = NFS_SERVER(dir);
3647 struct nfs_renameargs *arg = msg->rpc_argp;
3648 struct nfs_renameres *res = msg->rpc_resp;
3649
3650 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENAME];
d3d4152a 3651 res->server = server;
a9c92d6b 3652 nfs4_init_sequence(&arg->seq_args, &res->seq_res, 1);
d3d4152a
JL		 3653}
3654
c6bfa1a1
BS		 3655static void nfs4_proc_rename_rpc_prepare(struct rpc_task *task, struct nfs_renamedata *data)
3656{
d9afbd1b
TM		 3657 nfs4_setup_sequence(NFS_SERVER(data->old_dir),
3658 &data->args.seq_args,
3659 &data->res.seq_res,
3660 task);
d3d4152a
JL		 3661}
3662
3663static int nfs4_proc_rename_done(struct rpc_task *task, struct inode *old_dir,
3664 struct inode *new_dir)
3665{
fbc6f7c2
TM		 3666 struct nfs_renamedata *data = task->tk_calldata;
3667 struct nfs_renameres *res = &data->res;
d3d4152a
JL		 3668
3669 if (!nfs4_sequence_done(task, &res->seq_res))
3670 return 0;
8478eaa1 3671 if (nfs4_async_handle_error(task, res->server, NULL, &data->timeout) == -EAGAIN)
d3d4152a
JL		 3672 return 0;
3673
3674 update_changeattr(old_dir, &res->old_cinfo);
d3d4152a 3675 update_changeattr(new_dir, &res->new_cinfo);
d3d4152a
JL		 3676 return 1;
3677}
3678
1da177e4
LT		 3679static int _nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3680{
91ba2eee 3681 struct nfs_server *server = NFS_SERVER(inode);
1da177e4
LT		 3682 struct nfs4_link_arg arg = {
3683 .fh = NFS_FH(inode),
3684 .dir_fh = NFS_FH(dir),
3685 .name = name,
91ba2eee
TM		 3686 .bitmask = server->attr_bitmask,
3687 };
91ba2eee
TM		 3688 struct nfs4_link_res res = {
3689 .server = server,
1775fd3e 3690 .label = NULL,
1da177e4 3691 };
1da177e4
LT		 3692 struct rpc_message msg = {
3693 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LINK],
3694 .rpc_argp = &arg,
91ba2eee 3695 .rpc_resp = &res,
1da177e4 3696 };
136f2627
TM		 3697 int status = -ENOMEM;
3698
3699 res.fattr = nfs_alloc_fattr();
778d2817 3700 if (res.fattr == NULL)
136f2627 3701 goto out;
1da177e4 3702
14c43f76
DQ		 3703 res.label = nfs4_label_alloc(server, GFP_KERNEL);
3704 if (IS_ERR(res.label)) {
3705 status = PTR_ERR(res.label);
3706 goto out;
3707 }
aa9c2669 3708 arg.bitmask = nfs4_bitmask(server, res.label);
14c43f76 3709
7c513058 3710 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
91ba2eee
TM		 3711 if (!status) {
3712 update_changeattr(dir, &res.cinfo);
aa9c2669
DQ		 3713 status = nfs_post_op_update_inode(inode, res.fattr);
3714 if (!status)
3715 nfs_setsecurity(inode, res.fattr, res.label);
91ba2eee 3716 }
14c43f76
DQ		 3717
3718
3719 nfs4_label_free(res.label);
3720
136f2627 3721out:
136f2627 3722 nfs_free_fattr(res.fattr);
1da177e4
LT		 3723 return status;
3724}
3725
3726static int nfs4_proc_link(struct inode *inode, struct inode *dir, struct qstr *name)
3727{
3728 struct nfs4_exception exception = { };
3729 int err;
3730 do {
3731 err = nfs4_handle_exception(NFS_SERVER(inode),
3732 _nfs4_proc_link(inode, dir, name),
3733 &exception);
3734 } while (exception.retry);
3735 return err;
3736}
3737
57dc9a57
TM		 3738struct nfs4_createdata {
3739 struct rpc_message msg;
3740 struct nfs4_create_arg arg;
3741 struct nfs4_create_res res;
3742 struct nfs_fh fh;
3743 struct nfs_fattr fattr;
1775fd3e 3744 struct nfs4_label *label;
57dc9a57
TM		 3745};
3746
3747static struct nfs4_createdata *nfs4_alloc_createdata(struct inode *dir,
3748 struct qstr *name, struct iattr *sattr, u32 ftype)
3749{
3750 struct nfs4_createdata *data;
3751
3752 data = kzalloc(sizeof(*data), GFP_KERNEL);
3753 if (data != NULL) {
3754 struct nfs_server *server = NFS_SERVER(dir);
3755
14c43f76
DQ		 3756 data->label = nfs4_label_alloc(server, GFP_KERNEL);
3757 if (IS_ERR(data->label))
3758 goto out_free;
3759
57dc9a57
TM		 3760 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE];
3761 data->msg.rpc_argp = &data->arg;
3762 data->msg.rpc_resp = &data->res;
3763 data->arg.dir_fh = NFS_FH(dir);
3764 data->arg.server = server;
3765 data->arg.name = name;
3766 data->arg.attrs = sattr;
3767 data->arg.ftype = ftype;
aa9c2669 3768 data->arg.bitmask = nfs4_bitmask(server, data->label);
57dc9a57
TM		 3769 data->res.server = server;
3770 data->res.fh = &data->fh;
3771 data->res.fattr = &data->fattr;
1775fd3e 3772 data->res.label = data->label;
57dc9a57 3773 nfs_fattr_init(data->res.fattr);
57dc9a57
TM		 3774 }
3775 return data;
14c43f76
DQ		 3776out_free:
3777 kfree(data);
3778 return NULL;
57dc9a57
TM		 3779}
3780
3781static int nfs4_do_create(struct inode *dir, struct dentry *dentry, struct nfs4_createdata *data)
3782{
7c513058 3783 int status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &data->msg,
e73b83f2 3784 &data->arg.seq_args, &data->res.seq_res, 1);
57dc9a57
TM		 3785 if (status == 0) {
3786 update_changeattr(dir, &data->res.dir_cinfo);
1775fd3e 3787 status = nfs_instantiate(dentry, data->res.fh, data->res.fattr, data->res.label);
57dc9a57
TM		 3788 }
3789 return status;
3790}
3791
3792static void nfs4_free_createdata(struct nfs4_createdata *data)
3793{
14c43f76 3794 nfs4_label_free(data->label);
57dc9a57
TM		 3795 kfree(data);
3796}
3797
4f390c15 3798static int _nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
1775fd3e
DQ		 3799 struct page *page, unsigned int len, struct iattr *sattr,
3800 struct nfs4_label *label)
1da177e4 3801{
57dc9a57
TM		 3802 struct nfs4_createdata *data;
3803 int status = -ENAMETOOLONG;
1da177e4 3804
94a6d753 3805 if (len > NFS4_MAXPATHLEN)
57dc9a57 3806 goto out;
4f390c15 3807
57dc9a57
TM		 3808 status = -ENOMEM;
3809 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4LNK);
3810 if (data == NULL)
3811 goto out;
3812
3813 data->msg.rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SYMLINK];
3814 data->arg.u.symlink.pages = &page;
3815 data->arg.u.symlink.len = len;
1775fd3e 3816 data->arg.label = label;
1da177e4 3817
57dc9a57
TM		 3818 status = nfs4_do_create(dir, dentry, data);
3819
3820 nfs4_free_createdata(data);
3821out:
1da177e4
LT		 3822 return status;
3823}
3824
4f390c15 3825static int nfs4_proc_symlink(struct inode *dir, struct dentry *dentry,
94a6d753 3826 struct page *page, unsigned int len, struct iattr *sattr)
1da177e4
LT		 3827{
3828 struct nfs4_exception exception = { };
aa9c2669 3829 struct nfs4_label l, *label = NULL;
1da177e4 3830 int err;
aa9c2669
DQ		 3831
3832 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3833
1da177e4 3834 do {
078ea3df
TM		 3835 err = _nfs4_proc_symlink(dir, dentry, page, len, sattr, label);
3836 trace_nfs4_symlink(dir, &dentry->d_name, err);
3837 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3838 &exception);
3839 } while (exception.retry);
aa9c2669
DQ		 3840
3841 nfs4_label_release_security(label);
1da177e4
LT		 3842 return err;
3843}
3844
3845static int _nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
1775fd3e 3846 struct iattr *sattr, struct nfs4_label *label)
1da177e4 3847{
57dc9a57
TM		 3848 struct nfs4_createdata *data;
3849 int status = -ENOMEM;
1da177e4 3850
57dc9a57
TM		 3851 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4DIR);
3852 if (data == NULL)
3853 goto out;
3854
1775fd3e 3855 data->arg.label = label;
57dc9a57
TM		 3856 status = nfs4_do_create(dir, dentry, data);
3857
3858 nfs4_free_createdata(data);
3859out:
1da177e4
LT		 3860 return status;
3861}
3862
3863static int nfs4_proc_mkdir(struct inode *dir, struct dentry *dentry,
3864 struct iattr *sattr)
3865{
3866 struct nfs4_exception exception = { };
aa9c2669 3867 struct nfs4_label l, *label = NULL;
1da177e4 3868 int err;
a8a5da99 3869
aa9c2669
DQ		 3870 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3871
a8a5da99 3872 sattr->ia_mode &= ~current_umask();
1da177e4 3873 do {
078ea3df
TM		 3874 err = _nfs4_proc_mkdir(dir, dentry, sattr, label);
3875 trace_nfs4_mkdir(dir, &dentry->d_name, err);
3876 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3877 &exception);
3878 } while (exception.retry);
aa9c2669
DQ		 3879 nfs4_label_release_security(label);
3880
1da177e4
LT		 3881 return err;
3882}
3883
3884static int _nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3885 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4 3886{
2b0143b5 3887 struct inode *dir = d_inode(dentry);
1da177e4
LT		 3888 struct nfs4_readdir_arg args = {
3889 .fh = NFS_FH(dir),
56e4ebf8 3890 .pages = pages,
1da177e4
LT		 3891 .pgbase = 0,
3892 .count = count,
2b0143b5 3893 .bitmask = NFS_SERVER(d_inode(dentry))->attr_bitmask,
82f2e547 3894 .plus = plus,
1da177e4
LT		 3895 };
3896 struct nfs4_readdir_res res;
3897 struct rpc_message msg = {
3898 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READDIR],
3899 .rpc_argp = &args,
3900 .rpc_resp = &res,
3901 .rpc_cred = cred,
3902 };
3903 int status;
3904
6de1472f
AV		 3905 dprintk("%s: dentry = %pd2, cookie = %Lu\n", __func__,
3906 dentry,
eadf4598 3907 (unsigned long long)cookie);
c3f52af3 3908 nfs4_setup_readdir(cookie, NFS_I(dir)->cookieverf, dentry, &args);
1da177e4 3909 res.pgbase = args.pgbase;
7c513058 3910 status = nfs4_call_sync(NFS_SERVER(dir)->client, NFS_SERVER(dir), &msg, &args.seq_args, &res.seq_res, 0);
ac396128 3911 if (status >= 0) {
c3f52af3 3912 memcpy(NFS_I(dir)->cookieverf, res.verifier.data, NFS4_VERIFIER_SIZE);
ac396128
TM		 3913 status += args.pgbase;
3914 }
c4812998
TM		 3915
3916 nfs_invalidate_atime(dir);
3917
3110ff80 3918 dprintk("%s: returns %d\n", __func__, status);
1da177e4
LT		 3919 return status;
3920}
3921
3922static int nfs4_proc_readdir(struct dentry *dentry, struct rpc_cred *cred,
56e4ebf8 3923 u64 cookie, struct page **pages, unsigned int count, int plus)
1da177e4
LT		 3924{
3925 struct nfs4_exception exception = { };
3926 int err;
3927 do {
c1578b76
TM		 3928 err = _nfs4_proc_readdir(dentry, cred, cookie,
3929 pages, count, plus);
2b0143b5
DH		 3930 trace_nfs4_readdir(d_inode(dentry), err);
3931 err = nfs4_handle_exception(NFS_SERVER(d_inode(dentry)), err,
1da177e4
LT		 3932 &exception);
3933 } while (exception.retry);
3934 return err;
3935}
3936
3937static int _nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
aa9c2669 3938 struct iattr *sattr, struct nfs4_label *label, dev_t rdev)
1da177e4 3939{
57dc9a57
TM		 3940 struct nfs4_createdata *data;
3941 int mode = sattr->ia_mode;
3942 int status = -ENOMEM;
1da177e4 3943
57dc9a57
TM		 3944 data = nfs4_alloc_createdata(dir, &dentry->d_name, sattr, NF4SOCK);
3945 if (data == NULL)
3946 goto out;
3947
1da177e4 3948 if (S_ISFIFO(mode))
57dc9a57 3949 data->arg.ftype = NF4FIFO;
1da177e4 3950 else if (S_ISBLK(mode)) {
57dc9a57
TM		 3951 data->arg.ftype = NF4BLK;
3952 data->arg.u.device.specdata1 = MAJOR(rdev);
3953 data->arg.u.device.specdata2 = MINOR(rdev);
1da177e4
LT		 3954 }
3955 else if (S_ISCHR(mode)) {
57dc9a57
TM		 3956 data->arg.ftype = NF4CHR;
3957 data->arg.u.device.specdata1 = MAJOR(rdev);
3958 data->arg.u.device.specdata2 = MINOR(rdev);
4ea8fed5
TM		 3959 } else if (!S_ISSOCK(mode)) {
3960 status = -EINVAL;
3961 goto out_free;
1da177e4 3962 }
1775fd3e 3963
aa9c2669 3964 data->arg.label = label;
57dc9a57 3965 status = nfs4_do_create(dir, dentry, data);
4ea8fed5 3966out_free:
57dc9a57
TM		 3967 nfs4_free_createdata(data);
3968out:
1da177e4
LT		 3969 return status;
3970}
3971
3972static int nfs4_proc_mknod(struct inode *dir, struct dentry *dentry,
3973 struct iattr *sattr, dev_t rdev)
3974{
3975 struct nfs4_exception exception = { };
aa9c2669 3976 struct nfs4_label l, *label = NULL;
1da177e4 3977 int err;
a8a5da99 3978
aa9c2669
DQ		 3979 label = nfs4_label_init_security(dir, dentry, sattr, &l);
3980
a8a5da99 3981 sattr->ia_mode &= ~current_umask();
1da177e4 3982 do {
078ea3df
TM		 3983 err = _nfs4_proc_mknod(dir, dentry, sattr, label, rdev);
3984 trace_nfs4_mknod(dir, &dentry->d_name, err);
3985 err = nfs4_handle_exception(NFS_SERVER(dir), err,
1da177e4
LT		 3986 &exception);
3987 } while (exception.retry);
aa9c2669
DQ		 3988
3989 nfs4_label_release_security(label);
3990
1da177e4
LT		 3991 return err;
3992}
3993
3994static int _nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle,
3995 struct nfs_fsstat *fsstat)
3996{
3997 struct nfs4_statfs_arg args = {
3998 .fh = fhandle,
3999 .bitmask = server->attr_bitmask,
4000 };
24ad148a
BH		 4001 struct nfs4_statfs_res res = {
4002 .fsstat = fsstat,
4003 };
1da177e4
LT		 4004 struct rpc_message msg = {
4005 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_STATFS],
4006 .rpc_argp = &args,
24ad148a 4007 .rpc_resp = &res,
1da177e4
LT		 4008 };
4009
0e574af1 4010 nfs_fattr_init(fsstat->fattr);
7c513058 4011 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4012}
4013
4014static int nfs4_proc_statfs(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsstat *fsstat)
4015{
4016 struct nfs4_exception exception = { };
4017 int err;
4018 do {
4019 err = nfs4_handle_exception(server,
4020 _nfs4_proc_statfs(server, fhandle, fsstat),
4021 &exception);
4022 } while (exception.retry);
4023 return err;
4024}
4025
4026static int _nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle,
4027 struct nfs_fsinfo *fsinfo)
4028{
4029 struct nfs4_fsinfo_arg args = {
4030 .fh = fhandle,
4031 .bitmask = server->attr_bitmask,
4032 };
3dda5e43
BH		 4033 struct nfs4_fsinfo_res res = {
4034 .fsinfo = fsinfo,
4035 };
1da177e4
LT		 4036 struct rpc_message msg = {
4037 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSINFO],
4038 .rpc_argp = &args,
3dda5e43 4039 .rpc_resp = &res,
1da177e4
LT		 4040 };
4041
7c513058 4042 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4043}
4044
4045static int nfs4_do_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4046{
4047 struct nfs4_exception exception = { };
83ca7f5a 4048 unsigned long now = jiffies;
1da177e4
LT		 4049 int err;
4050
4051 do {
83ca7f5a 4052 err = _nfs4_do_fsinfo(server, fhandle, fsinfo);
b5f875a9 4053 trace_nfs4_fsinfo(server, fhandle, fsinfo->fattr, err);
83ca7f5a
CL		 4054 if (err == 0) {
4055 struct nfs_client *clp = server->nfs_client;
4056
4057 spin_lock(&clp->cl_lock);
4058 clp->cl_lease_time = fsinfo->lease_time * HZ;
4059 clp->cl_last_renewal = now;
4060 spin_unlock(&clp->cl_lock);
4061 break;
4062 }
4063 err = nfs4_handle_exception(server, err, &exception);
1da177e4
LT		 4064 } while (exception.retry);
4065 return err;
4066}
4067
4068static int nfs4_proc_fsinfo(struct nfs_server *server, struct nfs_fh *fhandle, struct nfs_fsinfo *fsinfo)
4069{
e38eb650
BS		 4070 int error;
4071
0e574af1 4072 nfs_fattr_init(fsinfo->fattr);
e38eb650 4073 error = nfs4_do_fsinfo(server, fhandle, fsinfo);
dc182549
PT		 4074 if (error == 0) {
4075 /* block layout checks this! */
4076 server->pnfs_blksize = fsinfo->blksize;
e38eb650 4077 set_pnfs_layoutdriver(server, fhandle, fsinfo->layouttype);
dc182549 4078 }
e38eb650
BS		 4079
4080 return error;
1da177e4
LT		 4081}
4082
4083static int _nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4084 struct nfs_pathconf *pathconf)
4085{
4086 struct nfs4_pathconf_arg args = {
4087 .fh = fhandle,
4088 .bitmask = server->attr_bitmask,
4089 };
d45b2989
BH		 4090 struct nfs4_pathconf_res res = {
4091 .pathconf = pathconf,
4092 };
1da177e4
LT		 4093 struct rpc_message msg = {
4094 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_PATHCONF],
4095 .rpc_argp = &args,
d45b2989 4096 .rpc_resp = &res,
1da177e4
LT		 4097 };
4098
4099 /* None of the pathconf attributes are mandatory to implement */
4100 if ((args.bitmask[0] & nfs4_pathconf_bitmap[0]) == 0) {
4101 memset(pathconf, 0, sizeof(*pathconf));
4102 return 0;
4103 }
4104
0e574af1 4105 nfs_fattr_init(pathconf->fattr);
7c513058 4106 return nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
1da177e4
LT		 4107}
4108
4109static int nfs4_proc_pathconf(struct nfs_server *server, struct nfs_fh *fhandle,
4110 struct nfs_pathconf *pathconf)
4111{
4112 struct nfs4_exception exception = { };
4113 int err;
4114
4115 do {
4116 err = nfs4_handle_exception(server,
4117 _nfs4_proc_pathconf(server, fhandle, pathconf),
4118 &exception);
4119 } while (exception.retry);
4120 return err;
4121}
4122
5521abfd 4123int nfs4_set_rw_stateid(nfs4_stateid *stateid,
9b206149
TM		 4124 const struct nfs_open_context *ctx,
4125 const struct nfs_lock_context *l_ctx,
4126 fmode_t fmode)
4127{
4128 const struct nfs_lockowner *lockowner = NULL;
4129
4130 if (l_ctx != NULL)
4131 lockowner = &l_ctx->lockowner;
5521abfd 4132 return nfs4_select_rw_stateid(stateid, ctx->state, fmode, lockowner);
9b206149
TM		 4133}
4134EXPORT_SYMBOL_GPL(nfs4_set_rw_stateid);
4135
5521abfd
TM		 4136static bool nfs4_stateid_is_current(nfs4_stateid *stateid,
4137 const struct nfs_open_context *ctx,
4138 const struct nfs_lock_context *l_ctx,
4139 fmode_t fmode)
4140{
4141 nfs4_stateid current_stateid;
4142
e1253be0
TM		 4143 /* If the current stateid represents a lost lock, then exit */
4144 if (nfs4_set_rw_stateid(&current_stateid, ctx, l_ctx, fmode) == -EIO)
4145 return true;
5521abfd
TM		 4146 return nfs4_stateid_match(stateid, &current_stateid);
4147}
4148
4149static bool nfs4_error_stateid_expired(int err)
4150{
4151 switch (err) {
4152 case -NFS4ERR_DELEG_REVOKED:
4153 case -NFS4ERR_ADMIN_REVOKED:
4154 case -NFS4ERR_BAD_STATEID:
4155 case -NFS4ERR_STALE_STATEID:
4156 case -NFS4ERR_OLD_STATEID:
4157 case -NFS4ERR_OPENMODE:
4158 case -NFS4ERR_EXPIRED:
4159 return true;
4160 }
4161 return false;
4162}
4163
d45f60c6 4164void __nfs4_read_done_cb(struct nfs_pgio_header *hdr)
d20581aa 4165{
d45f60c6 4166 nfs_invalidate_atime(hdr->inode);
d20581aa
BH		 4167}
4168
d45f60c6 4169static int nfs4_read_done_cb(struct rpc_task *task, struct nfs_pgio_header *hdr)
1da177e4 4170{
d45f60c6 4171 struct nfs_server *server = NFS_SERVER(hdr->inode);
1da177e4 4172
d45f60c6
WAA		 4173 trace_nfs4_read(hdr, task->tk_status);
4174 if (nfs4_async_handle_error(task, server,
8478eaa1
N		 4175 hdr->args.context->state,
4176 NULL) == -EAGAIN) {
d00c5d43 4177 rpc_restart_call_prepare(task);
ec06c096 4178 return -EAGAIN;
1da177e4 4179 }
8850df99 4180
d45f60c6 4181 __nfs4_read_done_cb(hdr);
1da177e4 4182 if (task->tk_status > 0)
d45f60c6 4183 renew_lease(server, hdr->timestamp);
ec06c096 4184 return 0;
1da177e4
LT		 4185}
4186
5521abfd 4187static bool nfs4_read_stateid_changed(struct rpc_task *task,
3c6b899c 4188 struct nfs_pgio_args *args)
5521abfd
TM		 4189{
4190
4191 if (!nfs4_error_stateid_expired(task->tk_status) ||
4192 nfs4_stateid_is_current(&args->stateid,
4193 args->context,
4194 args->lock_context,
4195 FMODE_READ))
4196 return false;
4197 rpc_restart_call_prepare(task);
4198 return true;
4199}
4200
d45f60c6 4201static int nfs4_read_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
cbdabc7f
AA		 4202{
4203
4204 dprintk("--> %s\n", __func__);
4205
d45f60c6 4206 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
cbdabc7f 4207 return -EAGAIN;
d45f60c6 4208 if (nfs4_read_stateid_changed(task, &hdr->args))
5521abfd 4209 return -EAGAIN;
d45f60c6
WAA		 4210 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4211 nfs4_read_done_cb(task, hdr);
cbdabc7f
AA		 4212}
4213
d45f60c6
WAA		 4214static void nfs4_proc_read_setup(struct nfs_pgio_header *hdr,
4215 struct rpc_message *msg)
1da177e4 4216{
d45f60c6
WAA		 4217 hdr->timestamp = jiffies;
4218 hdr->pgio_done_cb = nfs4_read_done_cb;
bdc7f021 4219 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_READ];
d45f60c6 4220 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 0);
1da177e4
LT		 4221}
4222
d45f60c6
WAA		 4223static int nfs4_proc_pgio_rpc_prepare(struct rpc_task *task,
4224 struct nfs_pgio_header *hdr)
ea7c3303 4225{
d45f60c6
WAA		 4226 if (nfs4_setup_sequence(NFS_SERVER(hdr->inode),
4227 &hdr->args.seq_args,
4228 &hdr->res.seq_res,
9b206149 4229 task))
ef1820f9 4230 return 0;
d45f60c6
WAA		 4231 if (nfs4_set_rw_stateid(&hdr->args.stateid, hdr->args.context,
4232 hdr->args.lock_context,
4233 hdr->rw_ops->rw_mode) == -EIO)
ef1820f9 4234 return -EIO;
d45f60c6 4235 if (unlikely(test_bit(NFS_CONTEXT_BAD, &hdr->args.context->flags)))
ef1820f9
N		 4236 return -EIO;
4237 return 0;
1da177e4
LT		 4238}
4239
d45f60c6
WAA		 4240static int nfs4_write_done_cb(struct rpc_task *task,
4241 struct nfs_pgio_header *hdr)
1da177e4 4242{
d45f60c6 4243 struct inode *inode = hdr->inode;
8478eaa1 4244
d45f60c6
WAA		 4245 trace_nfs4_write(hdr, task->tk_status);
4246 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
8478eaa1
N		 4247 hdr->args.context->state,
4248 NULL) == -EAGAIN) {
d00c5d43 4249 rpc_restart_call_prepare(task);
788e7a89 4250 return -EAGAIN;
1da177e4 4251 }
4f9838c7 4252 if (task->tk_status >= 0) {
d45f60c6 4253 renew_lease(NFS_SERVER(inode), hdr->timestamp);
a08a8cd3 4254 nfs_writeback_update_inode(hdr);
4f9838c7 4255 }
788e7a89 4256 return 0;
1da177e4
LT		 4257}
4258
5521abfd 4259static bool nfs4_write_stateid_changed(struct rpc_task *task,
3c6b899c 4260 struct nfs_pgio_args *args)
5521abfd
TM		 4261{
4262
4263 if (!nfs4_error_stateid_expired(task->tk_status) ||
4264 nfs4_stateid_is_current(&args->stateid,
4265 args->context,
4266 args->lock_context,
4267 FMODE_WRITE))
4268 return false;
4269 rpc_restart_call_prepare(task);
4270 return true;
4271}
4272
d45f60c6 4273static int nfs4_write_done(struct rpc_task *task, struct nfs_pgio_header *hdr)
b029bc9b 4274{
d45f60c6 4275 if (!nfs4_sequence_done(task, &hdr->res.seq_res))
b029bc9b 4276 return -EAGAIN;
d45f60c6 4277 if (nfs4_write_stateid_changed(task, &hdr->args))
5521abfd 4278 return -EAGAIN;
d45f60c6
WAA		 4279 return hdr->pgio_done_cb ? hdr->pgio_done_cb(task, hdr) :
4280 nfs4_write_done_cb(task, hdr);
b029bc9b
FI		 4281}
4282
5a37f851 4283static
d45f60c6 4284bool nfs4_write_need_cache_consistency_data(struct nfs_pgio_header *hdr)
a69aef14 4285{
5a37f851 4286 /* Don't request attributes for pNFS or O_DIRECT writes */
d45f60c6 4287 if (hdr->ds_clp != NULL || hdr->dreq != NULL)
5a37f851
TM		 4288 return false;
4289 /* Otherwise, request attributes if and only if we don't hold
4290 * a delegation
4291 */
011e2a7f 4292 return nfs4_have_delegation(hdr->inode, FMODE_READ) == 0;
a69aef14 4293}
a69aef14 4294
d45f60c6
WAA		 4295static void nfs4_proc_write_setup(struct nfs_pgio_header *hdr,
4296 struct rpc_message *msg)
1da177e4 4297{
d45f60c6 4298 struct nfs_server *server = NFS_SERVER(hdr->inode);
bdc7f021 4299
d45f60c6
WAA		 4300 if (!nfs4_write_need_cache_consistency_data(hdr)) {
4301 hdr->args.bitmask = NULL;
4302 hdr->res.fattr = NULL;
7ffd1064 4303 } else
d45f60c6 4304 hdr->args.bitmask = server->cache_consistency_bitmask;
5a37f851 4305
d45f60c6
WAA		 4306 if (!hdr->pgio_done_cb)
4307 hdr->pgio_done_cb = nfs4_write_done_cb;
4308 hdr->res.server = server;
4309 hdr->timestamp = jiffies;
1da177e4 4310
bdc7f021 4311 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_WRITE];
d45f60c6 4312 nfs4_init_sequence(&hdr->args.seq_args, &hdr->res.seq_res, 1);
1da177e4
LT		 4313}
4314
0b7c0153 4315static void nfs4_proc_commit_rpc_prepare(struct rpc_task *task, struct nfs_commit_data *data)
c6cb80d0 4316{
d9afbd1b
TM		 4317 nfs4_setup_sequence(NFS_SERVER(data->inode),
4318 &data->args.seq_args,
4319 &data->res.seq_res,
4320 task);
1da177e4
LT		 4321}
4322
0b7c0153 4323static int nfs4_commit_done_cb(struct rpc_task *task, struct nfs_commit_data *data)
1da177e4 4324{
1da177e4 4325 struct inode *inode = data->inode;
14516c3a 4326
cc668ab3 4327 trace_nfs4_commit(data, task->tk_status);
8478eaa1
N		 4328 if (nfs4_async_handle_error(task, NFS_SERVER(inode),
4329 NULL, NULL) == -EAGAIN) {
d00c5d43 4330 rpc_restart_call_prepare(task);
788e7a89 4331 return -EAGAIN;
1da177e4 4332 }
788e7a89 4333 return 0;
1da177e4
LT		 4334}
4335
0b7c0153 4336static int nfs4_commit_done(struct rpc_task *task, struct nfs_commit_data *data)
5f452431
FI		 4337{
4338 if (!nfs4_sequence_done(task, &data->res.seq_res))
4339 return -EAGAIN;
0b7c0153 4340 return data->commit_done_cb(task, data);
5f452431
FI		 4341}
4342
0b7c0153 4343static void nfs4_proc_commit_setup(struct nfs_commit_data *data, struct rpc_message *msg)
1da177e4 4344{
788e7a89 4345 struct nfs_server *server = NFS_SERVER(data->inode);
988b6dce 4346
0b7c0153
FI		 4347 if (data->commit_done_cb == NULL)
4348 data->commit_done_cb = nfs4_commit_done_cb;
4f9838c7 4349 data->res.server = server;
bdc7f021 4350 msg->rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_COMMIT];
a9c92d6b 4351 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
1da177e4
LT		 4352}
4353
9bc4e3ca
CL		 4354struct nfs4_renewdata {
4355 struct nfs_client *client;
4356 unsigned long timestamp;
4357};
4358
1da177e4
LT		 4359/*
4360 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
4361 * standalone procedure for queueing an asynchronous RENEW.
4362 */
9bc4e3ca 4363static void nfs4_renew_release(void *calldata)
dc96aef9 4364{
9bc4e3ca
CL		 4365 struct nfs4_renewdata *data = calldata;
4366 struct nfs_client *clp = data->client;
dc96aef9 4367
0851de06
AB		 4368 if (atomic_read(&clp->cl_count) > 1)
4369 nfs4_schedule_state_renewal(clp);
4370 nfs_put_client(clp);
9bc4e3ca 4371 kfree(data);
dc96aef9
AB		 4372}
4373
9bc4e3ca 4374static void nfs4_renew_done(struct rpc_task *task, void *calldata)
1da177e4 4375{
9bc4e3ca
CL		 4376 struct nfs4_renewdata *data = calldata;
4377 struct nfs_client *clp = data->client;
4378 unsigned long timestamp = data->timestamp;
1da177e4 4379
c6d01c6f 4380 trace_nfs4_renew_async(clp, task->tk_status);
f8aba1e8
CL		 4381 switch (task->tk_status) {
4382 case 0:
4383 break;
4384 case -NFS4ERR_LEASE_MOVED:
4385 nfs4_schedule_lease_moved_recovery(clp);
4386 break;
4387 default:
95baa25c 4388 /* Unless we're shutting down, schedule state recovery! */
042b60be
TM		 4389 if (test_bit(NFS_CS_RENEWD, &clp->cl_res_state) == 0)
4390 return;
4391 if (task->tk_status != NFS4ERR_CB_PATH_DOWN) {
0400a6b0 4392 nfs4_schedule_lease_recovery(clp);
042b60be
TM		 4393 return;
4394 }
4395 nfs4_schedule_path_down_recovery(clp);
1da177e4 4396 }
452e9352 4397 do_renew_lease(clp, timestamp);
1da177e4
LT		 4398}
4399
963d8fe5
TM		 4400static const struct rpc_call_ops nfs4_renew_ops = {
4401 .rpc_call_done = nfs4_renew_done,
dc96aef9 4402 .rpc_release = nfs4_renew_release,
963d8fe5
TM		 4403};
4404
2f60ea6b 4405static int nfs4_proc_async_renew(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
1da177e4
LT		 4406{
4407 struct rpc_message msg = {
4408 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4409 .rpc_argp = clp,
b4454fe1 4410 .rpc_cred = cred,
1da177e4 4411 };
9bc4e3ca 4412 struct nfs4_renewdata *data;
1da177e4 4413
2f60ea6b
TM		 4414 if (renew_flags == 0)
4415 return 0;
0851de06
AB		 4416 if (!atomic_inc_not_zero(&clp->cl_count))
4417 return -EIO;
b569ad34 4418 data = kmalloc(sizeof(*data), GFP_NOFS);
9bc4e3ca
CL		 4419 if (data == NULL)
4420 return -ENOMEM;
4421 data->client = clp;
4422 data->timestamp = jiffies;
bc7a05ca 4423 return rpc_call_async(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT,
9bc4e3ca 4424 &nfs4_renew_ops, data);
1da177e4
LT		 4425}
4426
8534d4ec 4427static int nfs4_proc_renew(struct nfs_client *clp, struct rpc_cred *cred)
1da177e4
LT		 4428{
4429 struct rpc_message msg = {
4430 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RENEW],
4431 .rpc_argp = clp,
b4454fe1 4432 .rpc_cred = cred,
1da177e4
LT		 4433 };
4434 unsigned long now = jiffies;
4435 int status;
4436
bc7a05ca 4437 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
1da177e4
LT		 4438 if (status < 0)
4439 return status;
452e9352 4440 do_renew_lease(clp, now);
1da177e4
LT		 4441 return 0;
4442}
4443
aa1870af
BF		 4444static inline int nfs4_server_supports_acls(struct nfs_server *server)
4445{
7dd7d959 4446 return server->caps & NFS_CAP_ACLS;
aa1870af
BF		 4447}
4448
21f498c2
TM		 4449/* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_SIZE, and that
4450 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_SIZE) bytes on
aa1870af
BF		 4451 * the stack.
4452 */
21f498c2 4453#define NFS4ACL_MAXPAGES DIV_ROUND_UP(XATTR_SIZE_MAX, PAGE_SIZE)
aa1870af 4454
e9e3d724
NH		 4455static int buf_to_pages_noslab(const void *buf, size_t buflen,
4456 struct page **pages, unsigned int *pgbase)
4457{
4458 struct page *newpage, **spages;
4459 int rc = 0;
4460 size_t len;
4461 spages = pages;
4462
4463 do {
21f498c2 4464 len = min_t(size_t, PAGE_SIZE, buflen);
e9e3d724
NH		 4465 newpage = alloc_page(GFP_KERNEL);
4466
4467 if (newpage == NULL)
4468 goto unwind;
4469 memcpy(page_address(newpage), buf, len);
4470 buf += len;
4471 buflen -= len;
4472 *pages++ = newpage;
4473 rc++;
4474 } while (buflen != 0);
4475
4476 return rc;
4477
4478unwind:
4479 for(; rc > 0; rc--)
4480 __free_page(spages[rc-1]);
4481 return -ENOMEM;
4482}
4483
e50a1c2e
BF		 4484struct nfs4_cached_acl {
4485 int cached;
4486 size_t len;
3e9d4154 4487 char data[0];
e50a1c2e
BF		 4488};
4489
4490static void nfs4_set_cached_acl(struct inode *inode, struct nfs4_cached_acl *acl)
4491{
4492 struct nfs_inode *nfsi = NFS_I(inode);
4493
4494 spin_lock(&inode->i_lock);
4495 kfree(nfsi->nfs4_acl);
4496 nfsi->nfs4_acl = acl;
4497 spin_unlock(&inode->i_lock);
4498}
4499
4500static void nfs4_zap_acl_attr(struct inode *inode)
4501{
4502 nfs4_set_cached_acl(inode, NULL);
4503}
4504
4505static inline ssize_t nfs4_read_cached_acl(struct inode *inode, char *buf, size_t buflen)
4506{
4507 struct nfs_inode *nfsi = NFS_I(inode);
4508 struct nfs4_cached_acl *acl;
4509 int ret = -ENOENT;
4510
4511 spin_lock(&inode->i_lock);
4512 acl = nfsi->nfs4_acl;
4513 if (acl == NULL)
4514 goto out;
4515 if (buf == NULL) /* user is just asking for length */
4516 goto out_len;
4517 if (acl->cached == 0)
4518 goto out;
4519 ret = -ERANGE; /* see getxattr(2) man page */
4520 if (acl->len > buflen)
4521 goto out;
4522 memcpy(buf, acl->data, acl->len);
4523out_len:
4524 ret = acl->len;
4525out:
4526 spin_unlock(&inode->i_lock);
4527 return ret;
4528}
4529
5794d21e 4530static void nfs4_write_cached_acl(struct inode *inode, struct page **pages, size_t pgbase, size_t acl_len)
e50a1c2e
BF		 4531{
4532 struct nfs4_cached_acl *acl;
b291f1b1 4533 size_t buflen = sizeof(*acl) + acl_len;
e50a1c2e 4534
1f1ea6c2 4535 if (buflen <= PAGE_SIZE) {
b291f1b1 4536 acl = kmalloc(buflen, GFP_KERNEL);
e50a1c2e
BF		 4537 if (acl == NULL)
4538 goto out;
4539 acl->cached = 1;
5794d21e 4540 _copy_from_pages(acl->data, pages, pgbase, acl_len);
e50a1c2e
BF		 4541 } else {
4542 acl = kmalloc(sizeof(*acl), GFP_KERNEL);
4543 if (acl == NULL)
4544 goto out;
4545 acl->cached = 0;
4546 }
4547 acl->len = acl_len;
4548out:
4549 nfs4_set_cached_acl(inode, acl);
4550}
4551
bf118a34
AA		 4552/*
4553 * The getxattr API returns the required buffer length when called with a
4554 * NULL buf. The NFSv4 acl tool then calls getxattr again after allocating
4555 * the required buf. On a NULL buf, we send a page of data to the server
4556 * guessing that the ACL request can be serviced by a page. If so, we cache
4557 * up to the page of ACL data, and the 2nd call to getxattr is serviced by
4558 * the cache. If not so, we throw away the page, and cache the required
4559 * length. The next getxattr call will then produce another round trip to
4560 * the server, this time with the input buf of the required size.
4561 */
16b4289c 4562static ssize_t __nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
aa1870af 4563{
bf118a34 4564 struct page *pages[NFS4ACL_MAXPAGES] = {NULL, };
aa1870af
BF		 4565 struct nfs_getaclargs args = {
4566 .fh = NFS_FH(inode),
4567 .acl_pages = pages,
4568 .acl_len = buflen,
4569 };
663c79b3
BH		 4570 struct nfs_getaclres res = {
4571 .acl_len = buflen,
4572 };
aa1870af
BF		 4573 struct rpc_message msg = {
4574 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETACL],
4575 .rpc_argp = &args,
663c79b3 4576 .rpc_resp = &res,
aa1870af 4577 };
21f498c2
TM		 4578 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
4579 int ret = -ENOMEM, i;
aa1870af 4580
bf118a34
AA		 4581 /* As long as we're doing a round trip to the server anyway,
4582 * let's be prepared for a page of acl data. */
4583 if (npages == 0)
4584 npages = 1;
21f498c2
TM		 4585 if (npages > ARRAY_SIZE(pages))
4586 return -ERANGE;
5a006899 4587
bf118a34
AA		 4588 for (i = 0; i < npages; i++) {
4589 pages[i] = alloc_page(GFP_KERNEL);
4590 if (!pages[i])
4591 goto out_free;
e50a1c2e 4592 }
5a006899
SP		 4593
4594 /* for decoding across pages */
4595 res.acl_scratch = alloc_page(GFP_KERNEL);
4596 if (!res.acl_scratch)
4597 goto out_free;
4598
bf118a34
AA		 4599 args.acl_len = npages * PAGE_SIZE;
4600 args.acl_pgbase = 0;
5a006899 4601
de040bec 4602 dprintk("%s buf %p buflen %zu npages %d args.acl_len %zu\n",
bf118a34
AA		 4603 __func__, buf, buflen, npages, args.acl_len);
4604 ret = nfs4_call_sync(NFS_SERVER(inode)->client, NFS_SERVER(inode),
4605 &msg, &args.seq_args, &res.seq_res, 0);
e50a1c2e
BF		 4606 if (ret)
4607 goto out_free;
bf118a34 4608
1f1ea6c2
TM		 4609 /* Handle the case where the passed-in buffer is too short */
4610 if (res.acl_flags & NFS4_ACL_TRUNC) {
4611 /* Did the user only issue a request for the acl length? */
4612 if (buf == NULL)
4613 goto out_ok;
e50a1c2e 4614 ret = -ERANGE;
1f1ea6c2 4615 goto out_free;
e50a1c2e 4616 }
1f1ea6c2 4617 nfs4_write_cached_acl(inode, pages, res.acl_data_offset, res.acl_len);
7d3e91a8
SW		 4618 if (buf) {
4619 if (res.acl_len > buflen) {
4620 ret = -ERANGE;
4621 goto out_free;
4622 }
1f1ea6c2 4623 _copy_from_pages(buf, pages, res.acl_data_offset, res.acl_len);
7d3e91a8 4624 }
1f1ea6c2
TM		 4625out_ok:
4626 ret = res.acl_len;
e50a1c2e 4627out_free:
bf118a34
AA		 4628 for (i = 0; i < npages; i++)
4629 if (pages[i])
4630 __free_page(pages[i]);
331818f1
TM		 4631 if (res.acl_scratch)
4632 __free_page(res.acl_scratch);
aa1870af
BF		 4633 return ret;
4634}
4635
16b4289c
TM		 4636static ssize_t nfs4_get_acl_uncached(struct inode *inode, void *buf, size_t buflen)
4637{
4638 struct nfs4_exception exception = { };
4639 ssize_t ret;
4640 do {
4641 ret = __nfs4_get_acl_uncached(inode, buf, buflen);
c1578b76 4642 trace_nfs4_get_acl(inode, ret);
16b4289c
TM		 4643 if (ret >= 0)
4644 break;
4645 ret = nfs4_handle_exception(NFS_SERVER(inode), ret, &exception);
4646 } while (exception.retry);
4647 return ret;
4648}
4649
e50a1c2e
BF		 4650static ssize_t nfs4_proc_get_acl(struct inode *inode, void *buf, size_t buflen)
4651{
4652 struct nfs_server *server = NFS_SERVER(inode);
4653 int ret;
4654
4655 if (!nfs4_server_supports_acls(server))
4656 return -EOPNOTSUPP;
4657 ret = nfs_revalidate_inode(server, inode);
4658 if (ret < 0)
4659 return ret;
08a22b39
AK		 4660 if (NFS_I(inode)->cache_validity & NFS_INO_INVALID_ACL)
4661 nfs_zap_acl_cache(inode);
e50a1c2e
BF		 4662 ret = nfs4_read_cached_acl(inode, buf, buflen);
4663 if (ret != -ENOENT)
bf118a34
AA		 4664 /* -ENOENT is returned if there is no ACL or if there is an ACL
4665 * but no cached acl data, just the acl length */
e50a1c2e
BF		 4666 return ret;
4667 return nfs4_get_acl_uncached(inode, buf, buflen);
4668}
4669
16b4289c 4670static int __nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4b580ee3
BF		 4671{
4672 struct nfs_server *server = NFS_SERVER(inode);
4673 struct page *pages[NFS4ACL_MAXPAGES];
4674 struct nfs_setaclargs arg = {
4675 .fh = NFS_FH(inode),
4676 .acl_pages = pages,
4677 .acl_len = buflen,
4678 };
73c403a9 4679 struct nfs_setaclres res;
4b580ee3
BF		 4680 struct rpc_message msg = {
4681 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETACL],
4682 .rpc_argp = &arg,
73c403a9 4683 .rpc_resp = &res,
4b580ee3 4684 };
21f498c2 4685 unsigned int npages = DIV_ROUND_UP(buflen, PAGE_SIZE);
e9e3d724 4686 int ret, i;
4b580ee3
BF		 4687
4688 if (!nfs4_server_supports_acls(server))
4689 return -EOPNOTSUPP;
21f498c2
TM		 4690 if (npages > ARRAY_SIZE(pages))
4691 return -ERANGE;
e9e3d724
NH		 4692 i = buf_to_pages_noslab(buf, buflen, arg.acl_pages, &arg.acl_pgbase);
4693 if (i < 0)
4694 return i;
57ec14c5 4695 nfs4_inode_return_delegation(inode);
7c513058 4696 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
e9e3d724
NH		 4697
4698 /*
4699 * Free each page after tx, so the only ref left is
4700 * held by the network stack
4701 */
4702 for (; i > 0; i--)
4703 put_page(pages[i-1]);
4704
08a22b39
AK		 4705 /*
4706 * Acl update can result in inode attribute update.
4707 * so mark the attribute cache invalid.
4708 */
4709 spin_lock(&inode->i_lock);
4710 NFS_I(inode)->cache_validity |= NFS_INO_INVALID_ATTR;
4711 spin_unlock(&inode->i_lock);
f41f7418
TM		 4712 nfs_access_zap_cache(inode);
4713 nfs_zap_acl_cache(inode);
4b580ee3
BF		 4714 return ret;
4715}
4716
16b4289c
TM		 4717static int nfs4_proc_set_acl(struct inode *inode, const void *buf, size_t buflen)
4718{
4719 struct nfs4_exception exception = { };
4720 int err;
4721 do {
c1578b76
TM		 4722 err = __nfs4_proc_set_acl(inode, buf, buflen);
4723 trace_nfs4_set_acl(inode, err);
4724 err = nfs4_handle_exception(NFS_SERVER(inode), err,
16b4289c
TM		 4725 &exception);
4726 } while (exception.retry);
4727 return err;
4728}
4729
aa9c2669
DQ		 4730#ifdef CONFIG_NFS_V4_SECURITY_LABEL
4731static int _nfs4_get_security_label(struct inode *inode, void *buf,
4732 size_t buflen)
4733{
4734 struct nfs_server *server = NFS_SERVER(inode);
4735 struct nfs_fattr fattr;
4736 struct nfs4_label label = {0, 0, buflen, buf};
4737
4738 u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
fcb63a9b 4739 struct nfs4_getattr_arg arg = {
aa9c2669
DQ		 4740 .fh = NFS_FH(inode),
4741 .bitmask = bitmask,
4742 };
4743 struct nfs4_getattr_res res = {
4744 .fattr = &fattr,
4745 .label = &label,
4746 .server = server,
4747 };
4748 struct rpc_message msg = {
4749 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETATTR],
fcb63a9b 4750 .rpc_argp = &arg,
aa9c2669
DQ		 4751 .rpc_resp = &res,
4752 };
4753 int ret;
4754
4755 nfs_fattr_init(&fattr);
4756
fcb63a9b 4757 ret = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 0);
aa9c2669
DQ		 4758 if (ret)
4759 return ret;
4760 if (!(fattr.valid & NFS_ATTR_FATTR_V4_SECURITY_LABEL))
4761 return -ENOENT;
4762 if (buflen < label.len)
4763 return -ERANGE;
4764 return 0;
4765}
4766
4767static int nfs4_get_security_label(struct inode *inode, void *buf,
4768 size_t buflen)
4769{
4770 struct nfs4_exception exception = { };
4771 int err;
4772
4773 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4774 return -EOPNOTSUPP;
4775
4776 do {
c1578b76
TM		 4777 err = _nfs4_get_security_label(inode, buf, buflen);
4778 trace_nfs4_get_security_label(inode, err);
4779 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4780 &exception);
4781 } while (exception.retry);
4782 return err;
4783}
4784
4785static int _nfs4_do_set_security_label(struct inode *inode,
4786 struct nfs4_label *ilabel,
4787 struct nfs_fattr *fattr,
4788 struct nfs4_label *olabel)
4789{
4790
4791 struct iattr sattr = {0};
4792 struct nfs_server *server = NFS_SERVER(inode);
4793 const u32 bitmask[3] = { 0, 0, FATTR4_WORD2_SECURITY_LABEL };
12207f69 4794 struct nfs_setattrargs arg = {
aa9c2669
DQ		 4795 .fh = NFS_FH(inode),
4796 .iap = &sattr,
4797 .server = server,
4798 .bitmask = bitmask,
4799 .label = ilabel,
4800 };
4801 struct nfs_setattrres res = {
4802 .fattr = fattr,
4803 .label = olabel,
4804 .server = server,
4805 };
4806 struct rpc_message msg = {
4807 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETATTR],
12207f69 4808 .rpc_argp = &arg,
aa9c2669
DQ		 4809 .rpc_resp = &res,
4810 };
4811 int status;
4812
12207f69 4813 nfs4_stateid_copy(&arg.stateid, &zero_stateid);
aa9c2669 4814
12207f69 4815 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
aa9c2669
DQ		 4816 if (status)
4817 dprintk("%s failed: %d\n", __func__, status);
4818
4819 return status;
4820}
4821
4822static int nfs4_do_set_security_label(struct inode *inode,
4823 struct nfs4_label *ilabel,
4824 struct nfs_fattr *fattr,
4825 struct nfs4_label *olabel)
4826{
4827 struct nfs4_exception exception = { };
4828 int err;
4829
4830 do {
c1578b76
TM		 4831 err = _nfs4_do_set_security_label(inode, ilabel,
4832 fattr, olabel);
4833 trace_nfs4_set_security_label(inode, err);
4834 err = nfs4_handle_exception(NFS_SERVER(inode), err,
aa9c2669
DQ		 4835 &exception);
4836 } while (exception.retry);
4837 return err;
4838}
4839
4840static int
4841nfs4_set_security_label(struct dentry *dentry, const void *buf, size_t buflen)
4842{
4843 struct nfs4_label ilabel, *olabel = NULL;
4844 struct nfs_fattr fattr;
4845 struct rpc_cred *cred;
2b0143b5 4846 struct inode *inode = d_inode(dentry);
aa9c2669
DQ		 4847 int status;
4848
4849 if (!nfs_server_capable(inode, NFS_CAP_SECURITY_LABEL))
4850 return -EOPNOTSUPP;
4851
4852 nfs_fattr_init(&fattr);
4853
4854 ilabel.pi = 0;
4855 ilabel.lfs = 0;
4856 ilabel.label = (char *)buf;
4857 ilabel.len = buflen;
4858
4859 cred = rpc_lookup_cred();
4860 if (IS_ERR(cred))
4861 return PTR_ERR(cred);
4862
4863 olabel = nfs4_label_alloc(NFS_SERVER(inode), GFP_KERNEL);
4864 if (IS_ERR(olabel)) {
4865 status = -PTR_ERR(olabel);
4866 goto out;
4867 }
4868
4869 status = nfs4_do_set_security_label(inode, &ilabel, &fattr, olabel);
4870 if (status == 0)
4871 nfs_setsecurity(inode, &fattr, olabel);
4872
4873 nfs4_label_free(olabel);
4874out:
4875 put_rpccred(cred);
4876 return status;
4877}
4878#endif /* CONFIG_NFS_V4_SECURITY_LABEL */
4879
4880
1da177e4 4881static int
8478eaa1
N		 4882nfs4_async_handle_error(struct rpc_task *task, const struct nfs_server *server,
4883 struct nfs4_state *state, long *timeout)
1da177e4 4884{
aa5190d0
TM		 4885 struct nfs_client *clp = server->nfs_client;
4886
4887 if (task->tk_status >= 0)
1da177e4
LT		 4888 return 0;
4889 switch(task->tk_status) {
a1d0b5ee 4890 case -NFS4ERR_DELEG_REVOKED:
9e33bed5
TM		 4891 case -NFS4ERR_ADMIN_REVOKED:
4892 case -NFS4ERR_BAD_STATEID:
4893 case -NFS4ERR_OPENMODE:
4894 if (state == NULL)
4895 break;
5d422301 4896 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4897 goto recovery_failed;
0400a6b0 4898 goto wait_on_recovery;
0ced63d1 4899 case -NFS4ERR_EXPIRED:
5d422301
TM		 4900 if (state != NULL) {
4901 if (nfs4_schedule_stateid_recovery(server, state) < 0)
9f51a78e 4902 goto recovery_failed;
5d422301 4903 }
1da177e4 4904 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 4905 case -NFS4ERR_STALE_CLIENTID:
0400a6b0
TM		 4906 nfs4_schedule_lease_recovery(clp);
4907 goto wait_on_recovery;
519ae255
CL		 4908 case -NFS4ERR_MOVED:
4909 if (nfs4_schedule_migration_recovery(server) < 0)
4910 goto recovery_failed;
4911 goto wait_on_recovery;
8ef2f8d4
CL		 4912 case -NFS4ERR_LEASE_MOVED:
4913 nfs4_schedule_lease_moved_recovery(clp);
4914 goto wait_on_recovery;
4745e315
AA		 4915#if defined(CONFIG_NFS_V4_1)
4916 case -NFS4ERR_BADSESSION:
4917 case -NFS4ERR_BADSLOT:
4918 case -NFS4ERR_BAD_HIGH_SLOT:
4919 case -NFS4ERR_DEADSESSION:
4920 case -NFS4ERR_CONN_NOT_BOUND_TO_SESSION:
4921 case -NFS4ERR_SEQ_FALSE_RETRY:
4922 case -NFS4ERR_SEQ_MISORDERED:
4923 dprintk("%s ERROR %d, Reset session\n", __func__,
4924 task->tk_status);
9f594791 4925 nfs4_schedule_session_recovery(clp->cl_session, task->tk_status);
4a82fd7c 4926 goto wait_on_recovery;
4745e315 4927#endif /* CONFIG_NFS_V4_1 */
1da177e4 4928 case -NFS4ERR_DELAY:
aa5190d0 4929 nfs_inc_server_stats(server, NFSIOS_DELAY);
8478eaa1
N		 4930 rpc_delay(task, nfs4_update_delay(timeout));
4931 goto restart_call;
006ea73e 4932 case -NFS4ERR_GRACE:
1da177e4 4933 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a 4934 case -NFS4ERR_RETRY_UNCACHED_REP:
1da177e4 4935 case -NFS4ERR_OLD_STATEID:
f1478c13 4936 goto restart_call;
1da177e4
LT		 4937 }
4938 task->tk_status = nfs4_map_errors(task->tk_status);
4939 return 0;
9f51a78e 4940recovery_failed:
5d422301
TM		 4941 task->tk_status = -EIO;
4942 return 0;
0400a6b0 4943wait_on_recovery:
a2c0b9e2 4944 rpc_sleep_on(&clp->cl_rpcwaitq, task, NULL);
a2c0b9e2
TM		 4945 if (test_bit(NFS4CLNT_MANAGER_RUNNING, &clp->cl_state) == 0)
4946 rpc_wake_up_queued_task(&clp->cl_rpcwaitq, task);
519ae255
CL		 4947 if (test_bit(NFS_MIG_FAILED, &server->mig_status))
4948 goto recovery_failed;
f1478c13 4949restart_call:
a2c0b9e2
TM		 4950 task->tk_status = 0;
4951 return -EAGAIN;
1da177e4
LT		 4952}
4953
f092075d
CL		 4954static void nfs4_init_boot_verifier(const struct nfs_client *clp,
4955 nfs4_verifier *bootverf)
cd93710e
CL		 4956{
4957 __be32 verf[2];
4958
2c820d9a
CL		 4959 if (test_bit(NFS4CLNT_PURGE_STATE, &clp->cl_state)) {
4960 /* An impossible timestamp guarantees this value
4961 * will never match a generated boot time. */
4962 verf[0] = 0;
17f26b12 4963 verf[1] = cpu_to_be32(NSEC_PER_SEC + 1);
2c820d9a 4964 } else {
f092075d 4965 struct nfs_net *nn = net_generic(clp->cl_net, nfs_net_id);
17f26b12
TM		 4966 verf[0] = cpu_to_be32(nn->boot_time.tv_sec);
4967 verf[1] = cpu_to_be32(nn->boot_time.tv_nsec);
2c820d9a 4968 }
cd93710e
CL		 4969 memcpy(bootverf->data, verf, sizeof(bootverf->data));
4970}
4971
a3192688
JL		 4972static int
4973nfs4_init_nonuniform_client_string(struct nfs_client *clp)
e984a55a 4974{
a3192688
JL		 4975 int result;
4976 size_t len;
4977 char *str;
4978 bool retried = false;
e984a55a 4979
ceb3a16c 4980 if (clp->cl_owner_id != NULL)
a3192688
JL		 4981 return 0;
4982retry:
4983 rcu_read_lock();
4984 len = 10 + strlen(clp->cl_ipaddr) + 1 +
4985 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR)) +
4986 1 +
4987 strlen(rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO)) +
4988 1;
4989 rcu_read_unlock();
4990
4991 if (len > NFS4_OPAQUE_LIMIT + 1)
4992 return -EINVAL;
4993
4994 /*
4995 * Since this string is allocated at mount time, and held until the
4996 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
4997 * about a memory-reclaim deadlock.
4998 */
4999 str = kmalloc(len, GFP_KERNEL);
5000 if (!str)
5001 return -ENOMEM;
ceb3a16c 5002
e984a55a 5003 rcu_read_lock();
a3192688
JL		 5004 result = scnprintf(str, len, "Linux NFSv4.0 %s/%s %s",
5005 clp->cl_ipaddr,
5006 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_ADDR),
5007 rpc_peeraddr2str(clp->cl_rpcclient, RPC_DISPLAY_PROTO));
e984a55a 5008 rcu_read_unlock();
a3192688
JL		 5009
5010 /* Did something change? */
5011 if (result >= len) {
5012 kfree(str);
5013 if (retried)
5014 return -EINVAL;
5015 retried = true;
5016 goto retry;
5017 }
5018 clp->cl_owner_id = str;
5019 return 0;
e984a55a
CL		 5020}
5021
873e3851
JL		 5022static int
5023nfs4_init_uniquifier_client_string(struct nfs_client *clp)
5024{
5025 int result;
5026 size_t len;
5027 char *str;
5028
5029 len = 10 + 10 + 1 + 10 + 1 +
5030 strlen(nfs4_client_id_uniquifier) + 1 +
5031 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5032
5033 if (len > NFS4_OPAQUE_LIMIT + 1)
5034 return -EINVAL;
5035
5036 /*
5037 * Since this string is allocated at mount time, and held until the
5038 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5039 * about a memory-reclaim deadlock.
5040 */
5041 str = kmalloc(len, GFP_KERNEL);
5042 if (!str)
5043 return -ENOMEM;
5044
5045 result = scnprintf(str, len, "Linux NFSv%u.%u %s/%s",
5046 clp->rpc_ops->version, clp->cl_minorversion,
5047 nfs4_client_id_uniquifier,
5048 clp->cl_rpcclient->cl_nodename);
5049 if (result >= len) {
5050 kfree(str);
5051 return -EINVAL;
5052 }
5053 clp->cl_owner_id = str;
5054 return 0;
5055}
5056
5057static int
5058nfs4_init_uniform_client_string(struct nfs_client *clp)
e984a55a 5059{
873e3851
JL		 5060 int result;
5061 size_t len;
5062 char *str;
ceb3a16c
TM		 5063
5064 if (clp->cl_owner_id != NULL)
873e3851 5065 return 0;
6f2ea7f2
CL		 5066
5067 if (nfs4_client_id_uniquifier[0] != '\0')
873e3851
JL		 5068 return nfs4_init_uniquifier_client_string(clp);
5069
5070 len = 10 + 10 + 1 + 10 + 1 +
5071 strlen(clp->cl_rpcclient->cl_nodename) + 1;
5072
5073 if (len > NFS4_OPAQUE_LIMIT + 1)
5074 return -EINVAL;
5075
5076 /*
5077 * Since this string is allocated at mount time, and held until the
5078 * nfs_client is destroyed, we can use GFP_KERNEL here w/o worrying
5079 * about a memory-reclaim deadlock.
5080 */
5081 str = kmalloc(len, GFP_KERNEL);
5082 if (!str)
5083 return -ENOMEM;
5084
5085 result = scnprintf(str, len, "Linux NFSv%u.%u %s",
5086 clp->rpc_ops->version, clp->cl_minorversion,
5087 clp->cl_rpcclient->cl_nodename);
5088 if (result >= len) {
5089 kfree(str);
5090 return -EINVAL;
5091 }
5092 clp->cl_owner_id = str;
5093 return 0;
e984a55a
CL		 5094}
5095
706cb8db
CL		 5096/*
5097 * nfs4_callback_up_net() starts only "tcp" and "tcp6" callback
5098 * services. Advertise one based on the address family of the
5099 * clientaddr.
5100 */
5101static unsigned int
5102nfs4_init_callback_netid(const struct nfs_client *clp, char *buf, size_t len)
5103{
5104 if (strchr(clp->cl_ipaddr, ':') != NULL)
5105 return scnprintf(buf, len, "tcp6");
5106 else
5107 return scnprintf(buf, len, "tcp");
5108}
5109
f11b2a1c
JL		 5110static void nfs4_setclientid_done(struct rpc_task *task, void *calldata)
5111{
5112 struct nfs4_setclientid *sc = calldata;
5113
5114 if (task->tk_status == 0)
5115 sc->sc_cred = get_rpccred(task->tk_rqstp->rq_cred);
5116}
5117
5118static const struct rpc_call_ops nfs4_setclientid_ops = {
5119 .rpc_call_done = nfs4_setclientid_done,
5120};
5121
6bbb4ae8
CL		 5122/**
5123 * nfs4_proc_setclientid - Negotiate client ID
5124 * @clp: state data structure
5125 * @program: RPC program for NFSv4 callback service
5126 * @port: IP port number for NFS4 callback service
5127 * @cred: RPC credential to use for this call
5128 * @res: where to place the result
5129 *
5130 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5131 */
bb8b27e5
TM		 5132int nfs4_proc_setclientid(struct nfs_client *clp, u32 program,
5133 unsigned short port, struct rpc_cred *cred,
5134 struct nfs4_setclientid_res *res)
1da177e4
LT		 5135{
5136 nfs4_verifier sc_verifier;
5137 struct nfs4_setclientid setclientid = {
5138 .sc_verifier = &sc_verifier,
5139 .sc_prog = program,
3a6bb738 5140 .sc_clnt = clp,
1da177e4
LT		 5141 };
5142 struct rpc_message msg = {
5143 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID],
5144 .rpc_argp = &setclientid,
bb8b27e5 5145 .rpc_resp = res,
286d7d6a 5146 .rpc_cred = cred,
1da177e4 5147 };
f11b2a1c
JL		 5148 struct rpc_task *task;
5149 struct rpc_task_setup task_setup_data = {
5150 .rpc_client = clp->cl_rpcclient,
5151 .rpc_message = &msg,
5152 .callback_ops = &nfs4_setclientid_ops,
5153 .callback_data = &setclientid,
5154 .flags = RPC_TASK_TIMEOUT,
5155 };
6bbb4ae8 5156 int status;
1da177e4 5157
de734831 5158 /* nfs_client_id4 */
f092075d 5159 nfs4_init_boot_verifier(clp, &sc_verifier);
873e3851
JL		 5160
5161 if (test_bit(NFS_CS_MIGRATION, &clp->cl_flags))
5162 status = nfs4_init_uniform_client_string(clp);
5163 else
a3192688 5164 status = nfs4_init_nonuniform_client_string(clp);
873e3851
JL		 5165
5166 if (status)
5167 goto out;
3a6bb738 5168
de734831 5169 /* cb_client4 */
706cb8db
CL		 5170 setclientid.sc_netid_len =
5171 nfs4_init_callback_netid(clp,
5172 setclientid.sc_netid,
5173 sizeof(setclientid.sc_netid));
de734831 5174 setclientid.sc_uaddr_len = scnprintf(setclientid.sc_uaddr,
d4d3c507 5175 sizeof(setclientid.sc_uaddr), "%s.%u.%u",
1da177e4
LT		 5176 clp->cl_ipaddr, port >> 8, port & 255);
5177
3a6bb738 5178 dprintk("NFS call setclientid auth=%s, '%s'\n",
6bbb4ae8 5179 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 5180 clp->cl_owner_id);
f11b2a1c
JL		 5181 task = rpc_run_task(&task_setup_data);
5182 if (IS_ERR(task)) {
5183 status = PTR_ERR(task);
5184 goto out;
5185 }
5186 status = task->tk_status;
5187 if (setclientid.sc_cred) {
5188 clp->cl_acceptor = rpcauth_stringify_acceptor(setclientid.sc_cred);
5189 put_rpccred(setclientid.sc_cred);
5190 }
5191 rpc_put_task(task);
5192out:
c6d01c6f 5193 trace_nfs4_setclientid(clp, status);
6bbb4ae8
CL		 5194 dprintk("NFS reply setclientid: %d\n", status);
5195 return status;
1da177e4
LT		 5196}
5197
6bbb4ae8
CL		 5198/**
5199 * nfs4_proc_setclientid_confirm - Confirm client ID
5200 * @clp: state data structure
5201 * @res: result of a previous SETCLIENTID
5202 * @cred: RPC credential to use for this call
5203 *
5204 * Returns zero, a negative errno, or a negative NFS4ERR status code.
5205 */
fd954ae1 5206int nfs4_proc_setclientid_confirm(struct nfs_client *clp,
bb8b27e5
TM		 5207 struct nfs4_setclientid_res *arg,
5208 struct rpc_cred *cred)
1da177e4 5209{
1da177e4
LT		 5210 struct rpc_message msg = {
5211 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SETCLIENTID_CONFIRM],
bb8b27e5 5212 .rpc_argp = arg,
286d7d6a 5213 .rpc_cred = cred,
1da177e4 5214 };
1da177e4
LT		 5215 int status;
5216
6bbb4ae8
CL		 5217 dprintk("NFS call setclientid_confirm auth=%s, (client ID %llx)\n",
5218 clp->cl_rpcclient->cl_auth->au_ops->au_name,
5219 clp->cl_clientid);
1bd714f2 5220 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 5221 trace_nfs4_setclientid_confirm(clp, status);
6bbb4ae8 5222 dprintk("NFS reply setclientid_confirm: %d\n", status);
1da177e4
LT		 5223 return status;
5224}
5225
fe650407
TM		 5226struct nfs4_delegreturndata {
5227 struct nfs4_delegreturnargs args;
fa178f29 5228 struct nfs4_delegreturnres res;
fe650407
TM		 5229 struct nfs_fh fh;
5230 nfs4_stateid stateid;
26e976a8 5231 unsigned long timestamp;
fa178f29 5232 struct nfs_fattr fattr;
fe650407 5233 int rpc_status;
039b756a
PT		 5234 struct inode *inode;
5235 bool roc;
5236 u32 roc_barrier;
fe650407
TM		 5237};
5238
fe650407
TM		 5239static void nfs4_delegreturn_done(struct rpc_task *task, void *calldata)
5240{
5241 struct nfs4_delegreturndata *data = calldata;
938e1010 5242
14516c3a
TM		 5243 if (!nfs4_sequence_done(task, &data->res.seq_res))
5244 return;
938e1010 5245
ca8acf8d 5246 trace_nfs4_delegreturn_exit(&data->args, &data->res, task->tk_status);
79708861 5247 switch (task->tk_status) {
79708861 5248 case 0:
fa178f29 5249 renew_lease(data->res.server, data->timestamp);
c97cf606
TM		 5250 case -NFS4ERR_ADMIN_REVOKED:
5251 case -NFS4ERR_DELEG_REVOKED:
5252 case -NFS4ERR_BAD_STATEID:
5253 case -NFS4ERR_OLD_STATEID:
5254 case -NFS4ERR_STALE_STATEID:
5255 case -NFS4ERR_EXPIRED:
5256 task->tk_status = 0;
039b756a
PT		 5257 if (data->roc)
5258 pnfs_roc_set_barrier(data->inode, data->roc_barrier);
c97cf606 5259 break;
79708861 5260 default:
8478eaa1
N		 5261 if (nfs4_async_handle_error(task, data->res.server,
5262 NULL, NULL) == -EAGAIN) {
d00c5d43 5263 rpc_restart_call_prepare(task);
79708861
RL		 5264 return;
5265 }
5266 }
5267 data->rpc_status = task->tk_status;
fe650407
TM		 5268}
5269
5270static void nfs4_delegreturn_release(void *calldata)
5271{
039b756a 5272 struct nfs4_delegreturndata *data = calldata;
ea7c38fe 5273 struct inode *inode = data->inode;
039b756a 5274
ea7c38fe
TM		 5275 if (inode) {
5276 if (data->roc)
5277 pnfs_roc_release(inode);
5278 nfs_iput_and_deactive(inode);
5279 }
fe650407
TM		 5280 kfree(calldata);
5281}
5282
938e1010
AA		 5283static void nfs4_delegreturn_prepare(struct rpc_task *task, void *data)
5284{
5285 struct nfs4_delegreturndata *d_data;
5286
5287 d_data = (struct nfs4_delegreturndata *)data;
5288
4ff376fe
TM		 5289 if (d_data->roc)
5290 pnfs_roc_get_barrier(d_data->inode, &d_data->roc_barrier);
039b756a 5291
d9afbd1b
TM		 5292 nfs4_setup_sequence(d_data->res.server,
5293 &d_data->args.seq_args,
5294 &d_data->res.seq_res,
5295 task);
938e1010 5296}
938e1010 5297
c8d149f3 5298static const struct rpc_call_ops nfs4_delegreturn_ops = {
938e1010 5299 .rpc_call_prepare = nfs4_delegreturn_prepare,
fe650407
TM		 5300 .rpc_call_done = nfs4_delegreturn_done,
5301 .rpc_release = nfs4_delegreturn_release,
5302};
5303
e6f81075 5304static int _nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
fe650407
TM		 5305{
5306 struct nfs4_delegreturndata *data;
fa178f29 5307 struct nfs_server *server = NFS_SERVER(inode);
fe650407 5308 struct rpc_task *task;
5138fde0
TM		 5309 struct rpc_message msg = {
5310 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DELEGRETURN],
5311 .rpc_cred = cred,
5312 };
c970aa85
TM		 5313 struct rpc_task_setup task_setup_data = {
5314 .rpc_client = server->client,
5138fde0 5315 .rpc_message = &msg,
c970aa85
TM		 5316 .callback_ops = &nfs4_delegreturn_ops,
5317 .flags = RPC_TASK_ASYNC,
5318 };
e6f81075 5319 int status = 0;
fe650407 5320
8535b2be 5321 data = kzalloc(sizeof(*data), GFP_NOFS);
fe650407
TM		 5322 if (data == NULL)
5323 return -ENOMEM;
a9c92d6b 5324 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
fe650407
TM		 5325 data->args.fhandle = &data->fh;
5326 data->args.stateid = &data->stateid;
9e907fec 5327 data->args.bitmask = server->cache_consistency_bitmask;
fe650407 5328 nfs_copy_fh(&data->fh, NFS_FH(inode));
f597c537 5329 nfs4_stateid_copy(&data->stateid, stateid);
fa178f29
TM		 5330 data->res.fattr = &data->fattr;
5331 data->res.server = server;
5138fde0 5332 nfs_fattr_init(data->res.fattr);
26e976a8 5333 data->timestamp = jiffies;
fe650407 5334 data->rpc_status = 0;
ea7c38fe
TM		 5335 data->inode = nfs_igrab_and_active(inode);
5336 if (data->inode)
5337 data->roc = nfs4_roc(inode);
fe650407 5338
c970aa85 5339 task_setup_data.callback_data = data;
1174dd1f
TM		 5340 msg.rpc_argp = &data->args;
5341 msg.rpc_resp = &data->res;
c970aa85 5342 task = rpc_run_task(&task_setup_data);
7a1218a2 5343 if (IS_ERR(task))
fe650407 5344 return PTR_ERR(task);
e6f81075
TM		 5345 if (!issync)
5346 goto out;
fe650407 5347 status = nfs4_wait_for_completion_rpc_task(task);
e6f81075
TM		 5348 if (status != 0)
5349 goto out;
5350 status = data->rpc_status;
e144cbcc
TM		 5351 if (status == 0)
5352 nfs_post_op_update_inode_force_wcc(inode, &data->fattr);
5353 else
5354 nfs_refresh_inode(inode, &data->fattr);
e6f81075 5355out:
e6b3c4db 5356 rpc_put_task(task);
fe650407 5357 return status;
1da177e4
LT		 5358}
5359
e6f81075 5360int nfs4_proc_delegreturn(struct inode *inode, struct rpc_cred *cred, const nfs4_stateid *stateid, int issync)
1da177e4
LT		 5361{
5362 struct nfs_server *server = NFS_SERVER(inode);
5363 struct nfs4_exception exception = { };
5364 int err;
5365 do {
e6f81075 5366 err = _nfs4_proc_delegreturn(inode, cred, stateid, issync);
ca8acf8d 5367 trace_nfs4_delegreturn(inode, err);
1da177e4
LT		 5368 switch (err) {
5369 case -NFS4ERR_STALE_STATEID:
5370 case -NFS4ERR_EXPIRED:
1da177e4
LT		 5371 case 0:
5372 return 0;
5373 }
5374 err = nfs4_handle_exception(server, err, &exception);
5375 } while (exception.retry);
5376 return err;
5377}
5378
5379#define NFS4_LOCK_MINTIMEOUT (1 * HZ)
5380#define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
5381
5382/*
5383 * sleep, with exponential backoff, and retry the LOCK operation.
5384 */
5385static unsigned long
5386nfs4_set_lock_task_retry(unsigned long timeout)
5387{
416ad3c9 5388 freezable_schedule_timeout_killable_unsafe(timeout);
1da177e4
LT		 5389 timeout <<= 1;
5390 if (timeout > NFS4_LOCK_MAXTIMEOUT)
5391 return NFS4_LOCK_MAXTIMEOUT;
5392 return timeout;
5393}
5394
1da177e4
LT		 5395static int _nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5396{
5397 struct inode *inode = state->inode;
5398 struct nfs_server *server = NFS_SERVER(inode);
7539bbab 5399 struct nfs_client *clp = server->nfs_client;
911d1aaf 5400 struct nfs_lockt_args arg = {
1da177e4 5401 .fh = NFS_FH(inode),
911d1aaf 5402 .fl = request,
1da177e4 5403 };
911d1aaf
TM		 5404 struct nfs_lockt_res res = {
5405 .denied = request,
1da177e4
LT		 5406 };
5407 struct rpc_message msg = {
5408 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKT],
5409 .rpc_argp = &arg,
5410 .rpc_resp = &res,
5411 .rpc_cred = state->owner->so_cred,
5412 };
1da177e4
LT		 5413 struct nfs4_lock_state *lsp;
5414 int status;
5415
911d1aaf 5416 arg.lock_owner.clientid = clp->cl_clientid;
8d0a8a9d
TM		 5417 status = nfs4_set_lock_state(state, request);
5418 if (status != 0)
5419 goto out;
5420 lsp = request->fl_u.nfs4_fl.owner;
48c22eb2 5421 arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5422 arg.lock_owner.s_dev = server->s_dev;
7c513058 5423 status = nfs4_call_sync(server->client, server, &msg, &arg.seq_args, &res.seq_res, 1);
911d1aaf
TM		 5424 switch (status) {
5425 case 0:
5426 request->fl_type = F_UNLCK;
5427 break;
5428 case -NFS4ERR_DENIED:
5429 status = 0;
1da177e4 5430 }
70cc6487 5431 request->fl_ops->fl_release_private(request);
a6f951dd 5432 request->fl_ops = NULL;
8d0a8a9d 5433out:
1da177e4
LT		 5434 return status;
5435}
5436
5437static int nfs4_proc_getlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5438{
5439 struct nfs4_exception exception = { };
5440 int err;
5441
5442 do {
d1b748a5
TM		 5443 err = _nfs4_proc_getlk(state, cmd, request);
5444 trace_nfs4_get_lock(request, state, cmd, err);
5445 err = nfs4_handle_exception(NFS_SERVER(state->inode), err,
1da177e4
LT		 5446 &exception);
5447 } while (exception.retry);
5448 return err;
5449}
5450
83bfff23 5451static int do_vfs_lock(struct inode *inode, struct file_lock *fl)
1da177e4
LT		 5452{
5453 int res = 0;
5454 switch (fl->fl_flags & (FL_POSIX|FL_FLOCK)) {
5455 case FL_POSIX:
83bfff23 5456 res = posix_lock_inode_wait(inode, fl);
1da177e4
LT		 5457 break;
5458 case FL_FLOCK:
83bfff23 5459 res = flock_lock_inode_wait(inode, fl);
1da177e4
LT		 5460 break;
5461 default:
5462 BUG();
5463 }
1da177e4
LT		 5464 return res;
5465}
5466
faf5f49c 5467struct nfs4_unlockdata {
911d1aaf
TM		 5468 struct nfs_locku_args arg;
5469 struct nfs_locku_res res;
faf5f49c
TM		 5470 struct nfs4_lock_state *lsp;
5471 struct nfs_open_context *ctx;
911d1aaf
TM		 5472 struct file_lock fl;
5473 const struct nfs_server *server;
26e976a8 5474 unsigned long timestamp;
faf5f49c
TM		 5475};
5476
911d1aaf
TM		 5477static struct nfs4_unlockdata *nfs4_alloc_unlockdata(struct file_lock *fl,
5478 struct nfs_open_context *ctx,
5479 struct nfs4_lock_state *lsp,
5480 struct nfs_seqid *seqid)
5481{
5482 struct nfs4_unlockdata *p;
5483 struct inode *inode = lsp->ls_state->inode;
5484
8535b2be 5485 p = kzalloc(sizeof(*p), GFP_NOFS);
911d1aaf
TM		 5486 if (p == NULL)
5487 return NULL;
5488 p->arg.fh = NFS_FH(inode);
5489 p->arg.fl = &p->fl;
5490 p->arg.seqid = seqid;
c1d51931 5491 p->res.seqid = seqid;
911d1aaf
TM		 5492 p->lsp = lsp;
5493 atomic_inc(&lsp->ls_count);
5494 /* Ensure we don't close file until we're done freeing locks! */
5495 p->ctx = get_nfs_open_context(ctx);
5496 memcpy(&p->fl, fl, sizeof(p->fl));
5497 p->server = NFS_SERVER(inode);
5498 return p;
5499}
5500
06f814a3 5501static void nfs4_locku_release_calldata(void *data)
faf5f49c 5502{
963d8fe5 5503 struct nfs4_unlockdata *calldata = data;
911d1aaf 5504 nfs_free_seqid(calldata->arg.seqid);
06f814a3
TM		 5505 nfs4_put_lock_state(calldata->lsp);
5506 put_nfs_open_context(calldata->ctx);
5507 kfree(calldata);
faf5f49c
TM		 5508}
5509
963d8fe5 5510static void nfs4_locku_done(struct rpc_task *task, void *data)
faf5f49c 5511{
963d8fe5 5512 struct nfs4_unlockdata *calldata = data;
faf5f49c 5513
14516c3a
TM		 5514 if (!nfs4_sequence_done(task, &calldata->res.seq_res))
5515 return;
faf5f49c
TM		 5516 switch (task->tk_status) {
5517 case 0:
26e976a8 5518 renew_lease(calldata->server, calldata->timestamp);
83bfff23 5519 do_vfs_lock(calldata->lsp->ls_state->inode, &calldata->fl);
c69899a1
TM		 5520 if (nfs4_update_lock_stateid(calldata->lsp,
5521 &calldata->res.stateid))
5522 break;
9e33bed5
TM		 5523 case -NFS4ERR_BAD_STATEID:
5524 case -NFS4ERR_OLD_STATEID:
faf5f49c
TM		 5525 case -NFS4ERR_STALE_STATEID:
5526 case -NFS4ERR_EXPIRED:
425c1d4e
TM		 5527 if (!nfs4_stateid_match(&calldata->arg.stateid,
5528 &calldata->lsp->ls_stateid))
5529 rpc_restart_call_prepare(task);
faf5f49c
TM		 5530 break;
5531 default:
8478eaa1
N		 5532 if (nfs4_async_handle_error(task, calldata->server,
5533 NULL, NULL) == -EAGAIN)
d00c5d43 5534 rpc_restart_call_prepare(task);
faf5f49c 5535 }
2b1bc308 5536 nfs_release_seqid(calldata->arg.seqid);
faf5f49c
TM		 5537}
5538
4ce70ada 5539static void nfs4_locku_prepare(struct rpc_task *task, void *data)
faf5f49c 5540{
4ce70ada 5541 struct nfs4_unlockdata *calldata = data;
faf5f49c 5542
911d1aaf 5543 if (nfs_wait_on_sequence(calldata->arg.seqid, task) != 0)
c8da19b9 5544 goto out_wait;
425c1d4e 5545 nfs4_stateid_copy(&calldata->arg.stateid, &calldata->lsp->ls_stateid);
795a88c9 5546 if (test_bit(NFS_LOCK_INITIALIZED, &calldata->lsp->ls_flags) == 0) {
963d8fe5 5547 /* Note: exit _without_ running nfs4_locku_done */
c8da19b9 5548 goto out_no_action;
faf5f49c 5549 }
26e976a8 5550 calldata->timestamp = jiffies;
035168ab 5551 if (nfs4_setup_sequence(calldata->server,
a893693c 5552 &calldata->arg.seq_args,
2240a9e2
TM		 5553 &calldata->res.seq_res,
5554 task) != 0)
5555 nfs_release_seqid(calldata->arg.seqid);
c8da19b9
TM		 5556 return;
5557out_no_action:
5558 task->tk_action = NULL;
5559out_wait:
5560 nfs4_sequence_done(task, &calldata->res.seq_res);
faf5f49c
TM		 5561}
5562
963d8fe5 5563static const struct rpc_call_ops nfs4_locku_ops = {
4ce70ada 5564 .rpc_call_prepare = nfs4_locku_prepare,
963d8fe5 5565 .rpc_call_done = nfs4_locku_done,
06f814a3 5566 .rpc_release = nfs4_locku_release_calldata,
963d8fe5
TM		 5567};
5568
a5d16a4d
TM		 5569static struct rpc_task *nfs4_do_unlck(struct file_lock *fl,
5570 struct nfs_open_context *ctx,
5571 struct nfs4_lock_state *lsp,
5572 struct nfs_seqid *seqid)
5573{
5574 struct nfs4_unlockdata *data;
5138fde0
TM		 5575 struct rpc_message msg = {
5576 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCKU],
5577 .rpc_cred = ctx->cred,
5578 };
c970aa85
TM		 5579 struct rpc_task_setup task_setup_data = {
5580 .rpc_client = NFS_CLIENT(lsp->ls_state->inode),
5138fde0 5581 .rpc_message = &msg,
c970aa85 5582 .callback_ops = &nfs4_locku_ops,
101070ca 5583 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5584 .flags = RPC_TASK_ASYNC,
5585 };
a5d16a4d 5586
fa940720
WAA		 5587 nfs4_state_protect(NFS_SERVER(lsp->ls_state->inode)->nfs_client,
5588 NFS_SP4_MACH_CRED_CLEANUP, &task_setup_data.rpc_client, &msg);
5589
137d6aca
FF		 5590 /* Ensure this is an unlock - when canceling a lock, the
5591 * canceled lock is passed in, and it won't be an unlock.
5592 */
5593 fl->fl_type = F_UNLCK;
5594
a5d16a4d
TM		 5595 data = nfs4_alloc_unlockdata(fl, ctx, lsp, seqid);
5596 if (data == NULL) {
5597 nfs_free_seqid(seqid);
5598 return ERR_PTR(-ENOMEM);
5599 }
5600
a9c92d6b 5601 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5602 msg.rpc_argp = &data->arg;
5603 msg.rpc_resp = &data->res;
c970aa85
TM		 5604 task_setup_data.callback_data = data;
5605 return rpc_run_task(&task_setup_data);
a5d16a4d
TM		 5606}
5607
faf5f49c
TM		 5608static int nfs4_proc_unlck(struct nfs4_state *state, int cmd, struct file_lock *request)
5609{
65b62a29
TM		 5610 struct inode *inode = state->inode;
5611 struct nfs4_state_owner *sp = state->owner;
5612 struct nfs_inode *nfsi = NFS_I(inode);
911d1aaf 5613 struct nfs_seqid *seqid;
1da177e4 5614 struct nfs4_lock_state *lsp;
06f814a3 5615 struct rpc_task *task;
b4019c0e 5616 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
06f814a3 5617 int status = 0;
536ff0f8 5618 unsigned char fl_flags = request->fl_flags;
faf5f49c 5619
8d0a8a9d 5620 status = nfs4_set_lock_state(state, request);
9b073574
TM		 5621 /* Unlock _before_ we do the RPC call */
5622 request->fl_flags |= FL_EXISTS;
65b62a29
TM		 5623 /* Exclude nfs_delegation_claim_locks() */
5624 mutex_lock(&sp->so_delegreturn_mutex);
5625 /* Exclude nfs4_reclaim_open_stateid() - note nesting! */
19e03c57 5626 down_read(&nfsi->rwsem);
83bfff23 5627 if (do_vfs_lock(inode, request) == -ENOENT) {
19e03c57 5628 up_read(&nfsi->rwsem);
65b62a29 5629 mutex_unlock(&sp->so_delegreturn_mutex);
9b073574 5630 goto out;
19e03c57
TM		 5631 }
5632 up_read(&nfsi->rwsem);
65b62a29 5633 mutex_unlock(&sp->so_delegreturn_mutex);
8d0a8a9d 5634 if (status != 0)
9b073574
TM		 5635 goto out;
5636 /* Is this a delegated lock? */
8d0a8a9d 5637 lsp = request->fl_u.nfs4_fl.owner;
c5a2a15f
TM		 5638 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) == 0)
5639 goto out;
b4019c0e
TM		 5640 alloc_seqid = NFS_SERVER(inode)->nfs_client->cl_mvops->alloc_seqid;
5641 seqid = alloc_seqid(&lsp->ls_seqid, GFP_KERNEL);
9b073574 5642 status = -ENOMEM;
badc76dd 5643 if (IS_ERR(seqid))
9b073574 5644 goto out;
cd3758e3 5645 task = nfs4_do_unlck(request, nfs_file_open_context(request->fl_file), lsp, seqid);
a5d16a4d
TM		 5646 status = PTR_ERR(task);
5647 if (IS_ERR(task))
9b073574 5648 goto out;
a5d16a4d 5649 status = nfs4_wait_for_completion_rpc_task(task);
e6b3c4db 5650 rpc_put_task(task);
9b073574 5651out:
536ff0f8 5652 request->fl_flags = fl_flags;
d1b748a5 5653 trace_nfs4_unlock(request, state, F_SETLK, status);
1da177e4
LT		 5654 return status;
5655}
5656
a5d16a4d
TM		 5657struct nfs4_lockdata {
5658 struct nfs_lock_args arg;
5659 struct nfs_lock_res res;
5660 struct nfs4_lock_state *lsp;
5661 struct nfs_open_context *ctx;
5662 struct file_lock fl;
26e976a8 5663 unsigned long timestamp;
a5d16a4d
TM		 5664 int rpc_status;
5665 int cancelled;
66179efe 5666 struct nfs_server *server;
a5d16a4d
TM		 5667};
5668
5669static struct nfs4_lockdata *nfs4_alloc_lockdata(struct file_lock *fl,
8535b2be
TM		 5670 struct nfs_open_context *ctx, struct nfs4_lock_state *lsp,
5671 gfp_t gfp_mask)
1da177e4 5672{
a5d16a4d
TM		 5673 struct nfs4_lockdata *p;
5674 struct inode *inode = lsp->ls_state->inode;
1da177e4 5675 struct nfs_server *server = NFS_SERVER(inode);
b4019c0e 5676 struct nfs_seqid *(*alloc_seqid)(struct nfs_seqid_counter *, gfp_t);
a5d16a4d 5677
8535b2be 5678 p = kzalloc(sizeof(*p), gfp_mask);
a5d16a4d
TM		 5679 if (p == NULL)
5680 return NULL;
5681
5682 p->arg.fh = NFS_FH(inode);
5683 p->arg.fl = &p->fl;
8535b2be 5684 p->arg.open_seqid = nfs_alloc_seqid(&lsp->ls_state->owner->so_seqid, gfp_mask);
badc76dd 5685 if (IS_ERR(p->arg.open_seqid))
2f74c0a0 5686 goto out_free;
b4019c0e
TM		 5687 alloc_seqid = server->nfs_client->cl_mvops->alloc_seqid;
5688 p->arg.lock_seqid = alloc_seqid(&lsp->ls_seqid, gfp_mask);
badc76dd 5689 if (IS_ERR(p->arg.lock_seqid))
2f74c0a0 5690 goto out_free_seqid;
7539bbab 5691 p->arg.lock_owner.clientid = server->nfs_client->cl_clientid;
48c22eb2 5692 p->arg.lock_owner.id = lsp->ls_seqid.owner_id;
d035c36c 5693 p->arg.lock_owner.s_dev = server->s_dev;
c1d51931 5694 p->res.lock_seqid = p->arg.lock_seqid;
a5d16a4d 5695 p->lsp = lsp;
66179efe 5696 p->server = server;
a5d16a4d
TM		 5697 atomic_inc(&lsp->ls_count);
5698 p->ctx = get_nfs_open_context(ctx);
feaff8e5 5699 get_file(fl->fl_file);
a5d16a4d
TM		 5700 memcpy(&p->fl, fl, sizeof(p->fl));
5701 return p;
2f74c0a0
TM		 5702out_free_seqid:
5703 nfs_free_seqid(p->arg.open_seqid);
a5d16a4d
TM		 5704out_free:
5705 kfree(p);
5706 return NULL;
5707}
5708
5709static void nfs4_lock_prepare(struct rpc_task *task, void *calldata)
5710{
5711 struct nfs4_lockdata *data = calldata;
5712 struct nfs4_state *state = data->lsp->ls_state;
06735b34 5713
3110ff80 5714 dprintk("%s: begin!\n", __func__);
2f74c0a0 5715 if (nfs_wait_on_sequence(data->arg.lock_seqid, task) != 0)
c8da19b9 5716 goto out_wait;
a5d16a4d 5717 /* Do we need to do an open_to_lock_owner? */
6b447539 5718 if (!test_bit(NFS_LOCK_INITIALIZED, &data->lsp->ls_flags)) {
8fe72bac 5719 if (nfs_wait_on_sequence(data->arg.open_seqid, task) != 0) {
2240a9e2 5720 goto out_release_lock_seqid;
8fe72bac 5721 }
425c1d4e
TM		 5722 nfs4_stateid_copy(&data->arg.open_stateid,
5723 &state->open_stateid);
a5d16a4d 5724 data->arg.new_lock_owner = 1;
c1d51931 5725 data->res.open_seqid = data->arg.open_seqid;
425c1d4e 5726 } else {
2f74c0a0 5727 data->arg.new_lock_owner = 0;
425c1d4e
TM		 5728 nfs4_stateid_copy(&data->arg.lock_stateid,
5729 &data->lsp->ls_stateid);
5730 }
5d422301
TM		 5731 if (!nfs4_valid_open_stateid(state)) {
5732 data->rpc_status = -EBADF;
5733 task->tk_action = NULL;
5734 goto out_release_open_seqid;
5735 }
26e976a8 5736 data->timestamp = jiffies;
035168ab
TM		 5737 if (nfs4_setup_sequence(data->server,
5738 &data->arg.seq_args,
2240a9e2 5739 &data->res.seq_res,
d9afbd1b 5740 task) == 0)
66179efe 5741 return;
5d422301 5742out_release_open_seqid:
2240a9e2
TM		 5743 nfs_release_seqid(data->arg.open_seqid);
5744out_release_lock_seqid:
5745 nfs_release_seqid(data->arg.lock_seqid);
c8da19b9
TM		 5746out_wait:
5747 nfs4_sequence_done(task, &data->res.seq_res);
8fe72bac 5748 dprintk("%s: done!, ret = %d\n", __func__, data->rpc_status);
b257957e
AB		 5749}
5750
a5d16a4d
TM		 5751static void nfs4_lock_done(struct rpc_task *task, void *calldata)
5752{
5753 struct nfs4_lockdata *data = calldata;
39071e6f 5754 struct nfs4_lock_state *lsp = data->lsp;
a5d16a4d 5755
3110ff80 5756 dprintk("%s: begin!\n", __func__);
a5d16a4d 5757
14516c3a
TM		 5758 if (!nfs4_sequence_done(task, &data->res.seq_res))
5759 return;
66179efe 5760
a5d16a4d 5761 data->rpc_status = task->tk_status;
425c1d4e
TM		 5762 switch (task->tk_status) {
5763 case 0:
2b0143b5 5764 renew_lease(NFS_SERVER(d_inode(data->ctx->dentry)),
39071e6f 5765 data->timestamp);
c69899a1
TM		 5766 if (data->arg.new_lock) {
5767 data->fl.fl_flags &= ~(FL_SLEEP | FL_ACCESS);
83bfff23 5768 if (do_vfs_lock(lsp->ls_state->inode, &data->fl) < 0) {
c69899a1
TM		 5769 rpc_restart_call_prepare(task);
5770 break;
5771 }
5772 }
39071e6f
TM		 5773 if (data->arg.new_lock_owner != 0) {
5774 nfs_confirm_seqid(&lsp->ls_seqid, 0);
5775 nfs4_stateid_copy(&lsp->ls_stateid, &data->res.stateid);
5776 set_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
5777 } else if (!nfs4_update_lock_stateid(lsp, &data->res.stateid))
5778 rpc_restart_call_prepare(task);
425c1d4e
TM		 5779 break;
5780 case -NFS4ERR_BAD_STATEID:
5781 case -NFS4ERR_OLD_STATEID:
5782 case -NFS4ERR_STALE_STATEID:
5783 case -NFS4ERR_EXPIRED:
5784 if (data->arg.new_lock_owner != 0) {
5785 if (!nfs4_stateid_match(&data->arg.open_stateid,
5786 &lsp->ls_state->open_stateid))
5787 rpc_restart_call_prepare(task);
5788 } else if (!nfs4_stateid_match(&data->arg.lock_stateid,
5789 &lsp->ls_stateid))
5790 rpc_restart_call_prepare(task);
a5d16a4d 5791 }
3110ff80 5792 dprintk("%s: done, ret = %d!\n", __func__, data->rpc_status);
a5d16a4d
TM		 5793}
5794
5795static void nfs4_lock_release(void *calldata)
5796{
5797 struct nfs4_lockdata *data = calldata;
5798
3110ff80 5799 dprintk("%s: begin!\n", __func__);
2f74c0a0 5800 nfs_free_seqid(data->arg.open_seqid);
a5d16a4d
TM		 5801 if (data->cancelled != 0) {
5802 struct rpc_task *task;
5803 task = nfs4_do_unlck(&data->fl, data->ctx, data->lsp,
5804 data->arg.lock_seqid);
5805 if (!IS_ERR(task))
bf294b41 5806 rpc_put_task_async(task);
3110ff80 5807 dprintk("%s: cancelling lock!\n", __func__);
a5d16a4d
TM		 5808 } else
5809 nfs_free_seqid(data->arg.lock_seqid);
5810 nfs4_put_lock_state(data->lsp);
5811 put_nfs_open_context(data->ctx);
feaff8e5 5812 fput(data->fl.fl_file);
a5d16a4d 5813 kfree(data);
3110ff80 5814 dprintk("%s: done!\n", __func__);
a5d16a4d
TM		 5815}
5816
5817static const struct rpc_call_ops nfs4_lock_ops = {
5818 .rpc_call_prepare = nfs4_lock_prepare,
5819 .rpc_call_done = nfs4_lock_done,
5820 .rpc_release = nfs4_lock_release,
5821};
5822
2bee72a6
TM		 5823static void nfs4_handle_setlk_error(struct nfs_server *server, struct nfs4_lock_state *lsp, int new_lock_owner, int error)
5824{
2bee72a6
TM		 5825 switch (error) {
5826 case -NFS4ERR_ADMIN_REVOKED:
5827 case -NFS4ERR_BAD_STATEID:
ecac799a 5828 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
2bee72a6 5829 if (new_lock_owner != 0 ||
795a88c9 5830 test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags) != 0)
ecac799a 5831 nfs4_schedule_stateid_recovery(server, lsp->ls_state);
a2c0b9e2
TM		 5832 break;
5833 case -NFS4ERR_STALE_STATEID:
a2c0b9e2 5834 lsp->ls_seqid.flags &= ~NFS_SEQID_CONFIRMED;
ecac799a
TM		 5835 case -NFS4ERR_EXPIRED:
5836 nfs4_schedule_lease_recovery(server->nfs_client);
2bee72a6
TM		 5837 };
5838}
5839
afe6c27c 5840static int _nfs4_do_setlk(struct nfs4_state *state, int cmd, struct file_lock *fl, int recovery_type)
a5d16a4d
TM		 5841{
5842 struct nfs4_lockdata *data;
5843 struct rpc_task *task;
5138fde0
TM		 5844 struct rpc_message msg = {
5845 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LOCK],
5846 .rpc_cred = state->owner->so_cred,
5847 };
c970aa85
TM		 5848 struct rpc_task_setup task_setup_data = {
5849 .rpc_client = NFS_CLIENT(state->inode),
5138fde0 5850 .rpc_message = &msg,
c970aa85 5851 .callback_ops = &nfs4_lock_ops,
101070ca 5852 .workqueue = nfsiod_workqueue,
c970aa85
TM		 5853 .flags = RPC_TASK_ASYNC,
5854 };
a5d16a4d
TM		 5855 int ret;
5856
3110ff80 5857 dprintk("%s: begin!\n", __func__);
cd3758e3 5858 data = nfs4_alloc_lockdata(fl, nfs_file_open_context(fl->fl_file),
8535b2be
TM		 5859 fl->fl_u.nfs4_fl.owner,
5860 recovery_type == NFS_LOCK_NEW ? GFP_KERNEL : GFP_NOFS);
a5d16a4d
TM		 5861 if (data == NULL)
5862 return -ENOMEM;
5863 if (IS_SETLKW(cmd))
5864 data->arg.block = 1;
a9c92d6b 5865 nfs4_init_sequence(&data->arg.seq_args, &data->res.seq_res, 1);
1174dd1f
TM		 5866 msg.rpc_argp = &data->arg;
5867 msg.rpc_resp = &data->res;
c970aa85 5868 task_setup_data.callback_data = data;
8fe72bac
TM		 5869 if (recovery_type > NFS_LOCK_NEW) {
5870 if (recovery_type == NFS_LOCK_RECLAIM)
5871 data->arg.reclaim = NFS_LOCK_RECLAIM;
5872 nfs4_set_sequence_privileged(&data->arg.seq_args);
c69899a1
TM		 5873 } else
5874 data->arg.new_lock = 1;
c970aa85 5875 task = rpc_run_task(&task_setup_data);
7a1218a2 5876 if (IS_ERR(task))
a5d16a4d 5877 return PTR_ERR(task);
a5d16a4d
TM		 5878 ret = nfs4_wait_for_completion_rpc_task(task);
5879 if (ret == 0) {
5880 ret = data->rpc_status;
2bee72a6
TM		 5881 if (ret)
5882 nfs4_handle_setlk_error(data->server, data->lsp,
5883 data->arg.new_lock_owner, ret);
a5d16a4d
TM		 5884 } else
5885 data->cancelled = 1;
e6b3c4db 5886 rpc_put_task(task);
3110ff80 5887 dprintk("%s: done, ret = %d!\n", __func__, ret);
a5d16a4d 5888 return ret;
1da177e4
LT		 5889}
5890
5891static int nfs4_lock_reclaim(struct nfs4_state *state, struct file_lock *request)
5892{
202b50dc 5893 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5894 struct nfs4_exception exception = {
5895 .inode = state->inode,
5896 };
202b50dc
TM		 5897 int err;
5898
5899 do {
42a2d13e
TM		 5900 /* Cache the lock if possible... */
5901 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5902 return 0;
afe6c27c 5903 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_RECLAIM);
d1b748a5 5904 trace_nfs4_lock_reclaim(request, state, F_SETLK, err);
168667c4 5905 if (err != -NFS4ERR_DELAY)
202b50dc
TM		 5906 break;
5907 nfs4_handle_exception(server, err, &exception);
5908 } while (exception.retry);
5909 return err;
1da177e4
LT		 5910}
5911
5912static int nfs4_lock_expired(struct nfs4_state *state, struct file_lock *request)
5913{
202b50dc 5914 struct nfs_server *server = NFS_SERVER(state->inode);
05ffe24f
TM		 5915 struct nfs4_exception exception = {
5916 .inode = state->inode,
5917 };
202b50dc
TM		 5918 int err;
5919
6bfc93ef
TM		 5920 err = nfs4_set_lock_state(state, request);
5921 if (err != 0)
5922 return err;
f6de7a39 5923 if (!recover_lost_locks) {
ef1820f9
N		 5924 set_bit(NFS_LOCK_LOST, &request->fl_u.nfs4_fl.owner->ls_flags);
5925 return 0;
5926 }
202b50dc 5927 do {
42a2d13e
TM		 5928 if (test_bit(NFS_DELEGATED_STATE, &state->flags) != 0)
5929 return 0;
afe6c27c 5930 err = _nfs4_do_setlk(state, F_SETLK, request, NFS_LOCK_EXPIRED);
d1b748a5 5931 trace_nfs4_lock_expired(request, state, F_SETLK, err);
a9ed2e25
TM		 5932 switch (err) {
5933 default:
5934 goto out;
5935 case -NFS4ERR_GRACE:
5936 case -NFS4ERR_DELAY:
5937 nfs4_handle_exception(server, err, &exception);
5938 err = 0;
5939 }
202b50dc 5940 } while (exception.retry);
a9ed2e25 5941out:
202b50dc 5942 return err;
1da177e4
LT		 5943}
5944
f062eb6c 5945#if defined(CONFIG_NFS_V4_1)
3e60ffdd
CL		 5946/**
5947 * nfs41_check_expired_locks - possibly free a lock stateid
5948 *
5949 * @state: NFSv4 state for an inode
5950 *
5951 * Returns NFS_OK if recovery for this stateid is now finished.
5952 * Otherwise a negative NFS4ERR value is returned.
5953 */
b01dd1d8 5954static int nfs41_check_expired_locks(struct nfs4_state *state)
f062eb6c 5955{
eb64cf96 5956 int status, ret = -NFS4ERR_BAD_STATEID;
b01dd1d8 5957 struct nfs4_lock_state *lsp;
f062eb6c
BS		 5958 struct nfs_server *server = NFS_SERVER(state->inode);
5959
b01dd1d8 5960 list_for_each_entry(lsp, &state->lock_states, ls_locks) {
795a88c9 5961 if (test_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags)) {
ab7cb0df
TM		 5962 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
5963
5964 status = nfs41_test_stateid(server,
5965 &lsp->ls_stateid,
5966 cred);
08cb47fa 5967 trace_nfs4_test_lock_stateid(state, lsp, status);
b01dd1d8 5968 if (status != NFS_OK) {
3e60ffdd
CL		 5969 /* Free the stateid unless the server
5970 * informs us the stateid is unrecognized. */
89af2739
CL		 5971 if (status != -NFS4ERR_BAD_STATEID)
5972 nfs41_free_stateid(server,
ab7cb0df
TM		 5973 &lsp->ls_stateid,
5974 cred);
795a88c9 5975 clear_bit(NFS_LOCK_INITIALIZED, &lsp->ls_flags);
b01dd1d8
BS		 5976 ret = status;
5977 }
5978 }
5979 };
5980
5981 return ret;
5982}
5983
5984static int nfs41_lock_expired(struct nfs4_state *state, struct file_lock *request)
5985{
5986 int status = NFS_OK;
5987
5988 if (test_bit(LK_STATE_IN_USE, &state->flags))
5989 status = nfs41_check_expired_locks(state);
eb64cf96
CL		 5990 if (status != NFS_OK)
5991 status = nfs4_lock_expired(state, request);
5992 return status;
f062eb6c
BS		 5993}
5994#endif
5995
1da177e4
LT		 5996static int _nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
5997{
19e03c57 5998 struct nfs_inode *nfsi = NFS_I(state->inode);
01c3b861 5999 unsigned char fl_flags = request->fl_flags;
8e469ebd 6000 int status = -ENOLCK;
1da177e4 6001
8e469ebd
TM		 6002 if ((fl_flags & FL_POSIX) &&
6003 !test_bit(NFS_STATE_POSIX_LOCKS, &state->flags))
6004 goto out;
6bfc93ef 6005 /* Is this a delegated open? */
6bfc93ef
TM		 6006 status = nfs4_set_lock_state(state, request);
6007 if (status != 0)
6008 goto out;
01c3b861 6009 request->fl_flags |= FL_ACCESS;
83bfff23 6010 status = do_vfs_lock(state->inode, request);
01c3b861
TM		 6011 if (status < 0)
6012 goto out;
19e03c57 6013 down_read(&nfsi->rwsem);
01c3b861 6014 if (test_bit(NFS_DELEGATED_STATE, &state->flags)) {
01c3b861 6015 /* Yes: cache locks! */
01c3b861 6016 /* ...but avoid races with delegation recall... */
19e03c57 6017 request->fl_flags = fl_flags & ~FL_SLEEP;
83bfff23 6018 status = do_vfs_lock(state->inode, request);
c69899a1 6019 up_read(&nfsi->rwsem);
9a99af49 6020 goto out;
9a99af49 6021 }
19e03c57 6022 up_read(&nfsi->rwsem);
c69899a1 6023 status = _nfs4_do_setlk(state, cmd, request, NFS_LOCK_NEW);
01c3b861
TM		 6024out:
6025 request->fl_flags = fl_flags;
1da177e4
LT		 6026 return status;
6027}
6028
6029static int nfs4_proc_setlk(struct nfs4_state *state, int cmd, struct file_lock *request)
6030{
a1d0b5ee
TM		 6031 struct nfs4_exception exception = {
6032 .state = state,
05ffe24f 6033 .inode = state->inode,
a1d0b5ee 6034 };
1da177e4
LT		 6035 int err;
6036
6037 do {
965b5d67 6038 err = _nfs4_proc_setlk(state, cmd, request);
d1b748a5 6039 trace_nfs4_set_lock(request, state, cmd, err);
965b5d67
TM		 6040 if (err == -NFS4ERR_DENIED)
6041 err = -EAGAIN;
1da177e4 6042 err = nfs4_handle_exception(NFS_SERVER(state->inode),
965b5d67 6043 err, &exception);
1da177e4
LT		 6044 } while (exception.retry);
6045 return err;
6046}
6047
6048static int
6049nfs4_proc_lock(struct file *filp, int cmd, struct file_lock *request)
6050{
6051 struct nfs_open_context *ctx;
6052 struct nfs4_state *state;
6053 unsigned long timeout = NFS4_LOCK_MINTIMEOUT;
6054 int status;
6055
6056 /* verify open state */
cd3758e3 6057 ctx = nfs_file_open_context(filp);
1da177e4
LT		 6058 state = ctx->state;
6059
6060 if (request->fl_start < 0 || request->fl_end < 0)
6061 return -EINVAL;
6062
d953126a
TM		 6063 if (IS_GETLK(cmd)) {
6064 if (state != NULL)
6065 return nfs4_proc_getlk(state, F_GETLK, request);
6066 return 0;
6067 }
1da177e4
LT		 6068
6069 if (!(IS_SETLK(cmd) || IS_SETLKW(cmd)))
6070 return -EINVAL;
6071
d953126a
TM		 6072 if (request->fl_type == F_UNLCK) {
6073 if (state != NULL)
6074 return nfs4_proc_unlck(state, cmd, request);
6075 return 0;
6076 }
1da177e4 6077
d953126a
TM		 6078 if (state == NULL)
6079 return -ENOLCK;
55725513
TM		 6080 /*
6081 * Don't rely on the VFS having checked the file open mode,
6082 * since it won't do this for flock() locks.
6083 */
f44106e2 6084 switch (request->fl_type) {
55725513
TM		 6085 case F_RDLCK:
6086 if (!(filp->f_mode & FMODE_READ))
6087 return -EBADF;
6088 break;
6089 case F_WRLCK:
6090 if (!(filp->f_mode & FMODE_WRITE))
6091 return -EBADF;
6092 }
6093
1da177e4
LT		 6094 do {
6095 status = nfs4_proc_setlk(state, cmd, request);
6096 if ((status != -EAGAIN) || IS_SETLK(cmd))
6097 break;
6098 timeout = nfs4_set_lock_task_retry(timeout);
6099 status = -ERESTARTSYS;
6100 if (signalled())
6101 break;
6102 } while(status < 0);
1da177e4
LT		 6103 return status;
6104}
6105
db4f2e63 6106int nfs4_lock_delegation_recall(struct file_lock *fl, struct nfs4_state *state, const nfs4_stateid *stateid)
888e694c
TM		 6107{
6108 struct nfs_server *server = NFS_SERVER(state->inode);
888e694c
TM		 6109 int err;
6110
6111 err = nfs4_set_lock_state(state, fl);
6112 if (err != 0)
db4f2e63 6113 return err;
4a706fa0 6114 err = _nfs4_do_setlk(state, F_SETLK, fl, NFS_LOCK_NEW);
db4f2e63 6115 return nfs4_handle_delegation_recall_error(server, state, stateid, err);
888e694c 6116}
6b3b5496 6117
cf470c3e
TM		 6118struct nfs_release_lockowner_data {
6119 struct nfs4_lock_state *lsp;
5ae67c4f 6120 struct nfs_server *server;
cf470c3e 6121 struct nfs_release_lockowner_args args;
b7e63a10 6122 struct nfs_release_lockowner_res res;
60ea6812 6123 unsigned long timestamp;
cf470c3e
TM		 6124};
6125
fbd4bfd1
CL		 6126static void nfs4_release_lockowner_prepare(struct rpc_task *task, void *calldata)
6127{
6128 struct nfs_release_lockowner_data *data = calldata;
5b53dc88 6129 struct nfs_server *server = data->server;
cb04ad2a
PT		 6130 nfs40_setup_sequence(server->nfs_client->cl_slot_tbl,
6131 &data->args.seq_args, &data->res.seq_res, task);
5b53dc88 6132 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
60ea6812 6133 data->timestamp = jiffies;
fbd4bfd1
CL		 6134}
6135
6136static void nfs4_release_lockowner_done(struct rpc_task *task, void *calldata)
6137{
6138 struct nfs_release_lockowner_data *data = calldata;
60ea6812
CL		 6139 struct nfs_server *server = data->server;
6140
b7e63a10 6141 nfs40_sequence_done(task, &data->res.seq_res);
60ea6812
CL		 6142
6143 switch (task->tk_status) {
6144 case 0:
6145 renew_lease(server, data->timestamp);
6146 break;
6147 case -NFS4ERR_STALE_CLIENTID:
6148 case -NFS4ERR_EXPIRED:
5b53dc88
KM		 6149 nfs4_schedule_lease_recovery(server->nfs_client);
6150 break;
60ea6812
CL		 6151 case -NFS4ERR_LEASE_MOVED:
6152 case -NFS4ERR_DELAY:
8478eaa1
N		 6153 if (nfs4_async_handle_error(task, server,
6154 NULL, NULL) == -EAGAIN)
60ea6812
CL		 6155 rpc_restart_call_prepare(task);
6156 }
fbd4bfd1
CL		 6157}
6158
d3c7b7cc
TM		 6159static void nfs4_release_lockowner_release(void *calldata)
6160{
cf470c3e 6161 struct nfs_release_lockowner_data *data = calldata;
5ae67c4f 6162 nfs4_free_lock_state(data->server, data->lsp);
d3c7b7cc
TM		 6163 kfree(calldata);
6164}
6165
17280175 6166static const struct rpc_call_ops nfs4_release_lockowner_ops = {
fbd4bfd1
CL		 6167 .rpc_call_prepare = nfs4_release_lockowner_prepare,
6168 .rpc_call_done = nfs4_release_lockowner_done,
d3c7b7cc
TM		 6169 .rpc_release = nfs4_release_lockowner_release,
6170};
6171
f1cdae87
JL		 6172static void
6173nfs4_release_lockowner(struct nfs_server *server, struct nfs4_lock_state *lsp)
d3c7b7cc 6174{
cf470c3e 6175 struct nfs_release_lockowner_data *data;
d3c7b7cc
TM		 6176 struct rpc_message msg = {
6177 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RELEASE_LOCKOWNER],
6178 };
6179
6180 if (server->nfs_client->cl_mvops->minor_version != 0)
f1cdae87 6181 return;
fbd4bfd1 6182
cf470c3e
TM		 6183 data = kmalloc(sizeof(*data), GFP_NOFS);
6184 if (!data)
f1cdae87 6185 return;
cf470c3e 6186 data->lsp = lsp;
5ae67c4f 6187 data->server = server;
cf470c3e
TM		 6188 data->args.lock_owner.clientid = server->nfs_client->cl_clientid;
6189 data->args.lock_owner.id = lsp->ls_seqid.owner_id;
6190 data->args.lock_owner.s_dev = server->s_dev;
fbd4bfd1 6191
cf470c3e 6192 msg.rpc_argp = &data->args;
b7e63a10
TM		 6193 msg.rpc_resp = &data->res;
6194 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
cf470c3e 6195 rpc_call_async(server->client, &msg, 0, &nfs4_release_lockowner_ops, data);
d3c7b7cc
TM		 6196}
6197
aa1870af
BF		 6198#define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
6199
64c2ce8b
AK		 6200static int nfs4_xattr_set_nfs4_acl(struct dentry *dentry, const char *key,
6201 const void *buf, size_t buflen,
6202 int flags, int type)
6b3b5496 6203{
64c2ce8b
AK		 6204 if (strcmp(key, "") != 0)
6205 return -EINVAL;
4b580ee3 6206
2b0143b5 6207 return nfs4_proc_set_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6208}
6209
64c2ce8b
AK		 6210static int nfs4_xattr_get_nfs4_acl(struct dentry *dentry, const char *key,
6211 void *buf, size_t buflen, int type)
6b3b5496 6212{
64c2ce8b
AK		 6213 if (strcmp(key, "") != 0)
6214 return -EINVAL;
aa1870af 6215
2b0143b5 6216 return nfs4_proc_get_acl(d_inode(dentry), buf, buflen);
6b3b5496
BF		 6217}
6218
64c2ce8b
AK		 6219static size_t nfs4_xattr_list_nfs4_acl(struct dentry *dentry, char *list,
6220 size_t list_len, const char *name,
6221 size_t name_len, int type)
6b3b5496 6222{
64c2ce8b 6223 size_t len = sizeof(XATTR_NAME_NFSV4_ACL);
6b3b5496 6224
2b0143b5 6225 if (!nfs4_server_supports_acls(NFS_SERVER(d_inode(dentry))))
096455a2 6226 return 0;
64c2ce8b
AK		 6227
6228 if (list && len <= list_len)
6229 memcpy(list, XATTR_NAME_NFSV4_ACL, len);
aa1870af 6230 return len;
6b3b5496
BF		 6231}
6232
c9bccef6
DQ		 6233#ifdef CONFIG_NFS_V4_SECURITY_LABEL
6234static inline int nfs4_server_supports_labels(struct nfs_server *server)
6235{
6236 return server->caps & NFS_CAP_SECURITY_LABEL;
6237}
6238
6239static int nfs4_xattr_set_nfs4_label(struct dentry *dentry, const char *key,
6240 const void *buf, size_t buflen,
6241 int flags, int type)
6242{
6243 if (security_ismaclabel(key))
6244 return nfs4_set_security_label(dentry, buf, buflen);
6245
6246 return -EOPNOTSUPP;
6247}
6248
6249static int nfs4_xattr_get_nfs4_label(struct dentry *dentry, const char *key,
6250 void *buf, size_t buflen, int type)
6251{
6252 if (security_ismaclabel(key))
2b0143b5 6253 return nfs4_get_security_label(d_inode(dentry), buf, buflen);
c9bccef6
DQ		 6254 return -EOPNOTSUPP;
6255}
6256
6257static size_t nfs4_xattr_list_nfs4_label(struct dentry *dentry, char *list,
6258 size_t list_len, const char *name,
6259 size_t name_len, int type)
6260{
6261 size_t len = 0;
6262
2b0143b5
DH		 6263 if (nfs_server_capable(d_inode(dentry), NFS_CAP_SECURITY_LABEL)) {
6264 len = security_inode_listsecurity(d_inode(dentry), NULL, 0);
c9bccef6 6265 if (list && len <= list_len)
2b0143b5 6266 security_inode_listsecurity(d_inode(dentry), list, len);
c9bccef6
DQ		 6267 }
6268 return len;
6269}
6270
6271static const struct xattr_handler nfs4_xattr_nfs4_label_handler = {
6272 .prefix = XATTR_SECURITY_PREFIX,
6273 .list = nfs4_xattr_list_nfs4_label,
6274 .get = nfs4_xattr_get_nfs4_label,
6275 .set = nfs4_xattr_set_nfs4_label,
6276};
6277#endif
6278
6279
533eb461
AA		 6280/*
6281 * nfs_fhget will use either the mounted_on_fileid or the fileid
6282 */
69aaaae1
TM		 6283static void nfs_fixup_referral_attributes(struct nfs_fattr *fattr)
6284{
533eb461
AA		 6285 if (!(((fattr->valid & NFS_ATTR_FATTR_MOUNTED_ON_FILEID) ||
6286 (fattr->valid & NFS_ATTR_FATTR_FILEID)) &&
6287 (fattr->valid & NFS_ATTR_FATTR_FSID) &&
81934ddb 6288 (fattr->valid & NFS_ATTR_FATTR_V4_LOCATIONS)))
69aaaae1
TM		 6289 return;
6290
6291 fattr->valid |= NFS_ATTR_FATTR_TYPE | NFS_ATTR_FATTR_MODE |
81934ddb 6292 NFS_ATTR_FATTR_NLINK | NFS_ATTR_FATTR_V4_REFERRAL;
69aaaae1
TM		 6293 fattr->mode = S_IFDIR | S_IRUGO | S_IXUGO;
6294 fattr->nlink = 2;
6295}
6296
f05d147f
BS		 6297static int _nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6298 const struct qstr *name,
6299 struct nfs4_fs_locations *fs_locations,
6300 struct page *page)
683b57b4
TM		 6301{
6302 struct nfs_server *server = NFS_SERVER(dir);
a09df2ca 6303 u32 bitmask[3] = {
361e624f 6304 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
683b57b4
TM		 6305 };
6306 struct nfs4_fs_locations_arg args = {
6307 .dir_fh = NFS_FH(dir),
c228fd3a 6308 .name = name,
683b57b4
TM		 6309 .page = page,
6310 .bitmask = bitmask,
6311 };
22958463
BH		 6312 struct nfs4_fs_locations_res res = {
6313 .fs_locations = fs_locations,
6314 };
683b57b4
TM		 6315 struct rpc_message msg = {
6316 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6317 .rpc_argp = &args,
22958463 6318 .rpc_resp = &res,
683b57b4
TM		 6319 };
6320 int status;
6321
3110ff80 6322 dprintk("%s: start\n", __func__);
533eb461
AA		 6323
6324 /* Ask for the fileid of the absent filesystem if mounted_on_fileid
6325 * is not supported */
6326 if (NFS_SERVER(dir)->attr_bitmask[1] & FATTR4_WORD1_MOUNTED_ON_FILEID)
6327 bitmask[1] |= FATTR4_WORD1_MOUNTED_ON_FILEID;
6328 else
6329 bitmask[0] |= FATTR4_WORD0_FILEID;
6330
c228fd3a 6331 nfs_fattr_init(&fs_locations->fattr);
683b57b4 6332 fs_locations->server = server;
830b8e33 6333 fs_locations->nlocations = 0;
f05d147f 6334 status = nfs4_call_sync(client, server, &msg, &args.seq_args, &res.seq_res, 0);
3110ff80 6335 dprintk("%s: returned status = %d\n", __func__, status);
683b57b4
TM		 6336 return status;
6337}
6338
f05d147f
BS		 6339int nfs4_proc_fs_locations(struct rpc_clnt *client, struct inode *dir,
6340 const struct qstr *name,
6341 struct nfs4_fs_locations *fs_locations,
6342 struct page *page)
db0a9593
BS		 6343{
6344 struct nfs4_exception exception = { };
6345 int err;
6346 do {
078ea3df
TM		 6347 err = _nfs4_proc_fs_locations(client, dir, name,
6348 fs_locations, page);
6349 trace_nfs4_get_fs_locations(dir, name, err);
6350 err = nfs4_handle_exception(NFS_SERVER(dir), err,
db0a9593
BS		 6351 &exception);
6352 } while (exception.retry);
6353 return err;
6354}
6355
b03d735b
CL		 6356/*
6357 * This operation also signals the server that this client is
6358 * performing migration recovery. The server can stop returning
6359 * NFS4ERR_LEASE_MOVED to this client. A RENEW operation is
6360 * appended to this compound to identify the client ID which is
6361 * performing recovery.
6362 */
6363static int _nfs40_proc_get_locations(struct inode *inode,
6364 struct nfs4_fs_locations *locations,
6365 struct page *page, struct rpc_cred *cred)
6366{
6367 struct nfs_server *server = NFS_SERVER(inode);
6368 struct rpc_clnt *clnt = server->client;
6369 u32 bitmask[2] = {
6370 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6371 };
6372 struct nfs4_fs_locations_arg args = {
6373 .clientid = server->nfs_client->cl_clientid,
6374 .fh = NFS_FH(inode),
6375 .page = page,
6376 .bitmask = bitmask,
6377 .migration = 1, /* skip LOOKUP */
6378 .renew = 1, /* append RENEW */
6379 };
6380 struct nfs4_fs_locations_res res = {
6381 .fs_locations = locations,
6382 .migration = 1,
6383 .renew = 1,
6384 };
6385 struct rpc_message msg = {
6386 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6387 .rpc_argp = &args,
6388 .rpc_resp = &res,
6389 .rpc_cred = cred,
6390 };
6391 unsigned long now = jiffies;
6392 int status;
6393
6394 nfs_fattr_init(&locations->fattr);
6395 locations->server = server;
6396 locations->nlocations = 0;
6397
6398 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6399 nfs4_set_sequence_privileged(&args.seq_args);
6400 status = nfs4_call_sync_sequence(clnt, server, &msg,
6401 &args.seq_args, &res.seq_res);
6402 if (status)
6403 return status;
6404
6405 renew_lease(server, now);
6406 return 0;
6407}
6408
6409#ifdef CONFIG_NFS_V4_1
6410
6411/*
6412 * This operation also signals the server that this client is
6413 * performing migration recovery. The server can stop asserting
6414 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID
6415 * performing this operation is identified in the SEQUENCE
6416 * operation in this compound.
6417 *
6418 * When the client supports GETATTR(fs_locations_info), it can
6419 * be plumbed in here.
6420 */
6421static int _nfs41_proc_get_locations(struct inode *inode,
6422 struct nfs4_fs_locations *locations,
6423 struct page *page, struct rpc_cred *cred)
6424{
6425 struct nfs_server *server = NFS_SERVER(inode);
6426 struct rpc_clnt *clnt = server->client;
6427 u32 bitmask[2] = {
6428 [0] = FATTR4_WORD0_FSID | FATTR4_WORD0_FS_LOCATIONS,
6429 };
6430 struct nfs4_fs_locations_arg args = {
6431 .fh = NFS_FH(inode),
6432 .page = page,
6433 .bitmask = bitmask,
6434 .migration = 1, /* skip LOOKUP */
6435 };
6436 struct nfs4_fs_locations_res res = {
6437 .fs_locations = locations,
6438 .migration = 1,
6439 };
6440 struct rpc_message msg = {
6441 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FS_LOCATIONS],
6442 .rpc_argp = &args,
6443 .rpc_resp = &res,
6444 .rpc_cred = cred,
6445 };
6446 int status;
6447
6448 nfs_fattr_init(&locations->fattr);
6449 locations->server = server;
6450 locations->nlocations = 0;
6451
6452 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6453 nfs4_set_sequence_privileged(&args.seq_args);
6454 status = nfs4_call_sync_sequence(clnt, server, &msg,
6455 &args.seq_args, &res.seq_res);
6456 if (status == NFS4_OK &&
6457 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6458 status = -NFS4ERR_LEASE_MOVED;
6459 return status;
6460}
6461
6462#endif /* CONFIG_NFS_V4_1 */
6463
6464/**
6465 * nfs4_proc_get_locations - discover locations for a migrated FSID
6466 * @inode: inode on FSID that is migrating
6467 * @locations: result of query
6468 * @page: buffer
6469 * @cred: credential to use for this operation
6470 *
6471 * Returns NFS4_OK on success, a negative NFS4ERR status code if the
6472 * operation failed, or a negative errno if a local error occurred.
6473 *
6474 * On success, "locations" is filled in, but if the server has
6475 * no locations information, NFS_ATTR_FATTR_V4_LOCATIONS is not
6476 * asserted.
6477 *
6478 * -NFS4ERR_LEASE_MOVED is returned if the server still has leases
6479 * from this client that require migration recovery.
6480 */
6481int nfs4_proc_get_locations(struct inode *inode,
6482 struct nfs4_fs_locations *locations,
6483 struct page *page, struct rpc_cred *cred)
6484{
6485 struct nfs_server *server = NFS_SERVER(inode);
6486 struct nfs_client *clp = server->nfs_client;
6487 const struct nfs4_mig_recovery_ops *ops =
6488 clp->cl_mvops->mig_recovery_ops;
6489 struct nfs4_exception exception = { };
6490 int status;
6491
6492 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6493 (unsigned long long)server->fsid.major,
6494 (unsigned long long)server->fsid.minor,
6495 clp->cl_hostname);
6496 nfs_display_fhandle(NFS_FH(inode), __func__);
6497
6498 do {
6499 status = ops->get_locations(inode, locations, page, cred);
6500 if (status != -NFS4ERR_DELAY)
6501 break;
6502 nfs4_handle_exception(server, status, &exception);
6503 } while (exception.retry);
6504 return status;
6505}
6506
44c99933
CL		 6507/*
6508 * This operation also signals the server that this client is
6509 * performing "lease moved" recovery. The server can stop
6510 * returning NFS4ERR_LEASE_MOVED to this client. A RENEW operation
6511 * is appended to this compound to identify the client ID which is
6512 * performing recovery.
6513 */
6514static int _nfs40_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6515{
6516 struct nfs_server *server = NFS_SERVER(inode);
6517 struct nfs_client *clp = NFS_SERVER(inode)->nfs_client;
6518 struct rpc_clnt *clnt = server->client;
6519 struct nfs4_fsid_present_arg args = {
6520 .fh = NFS_FH(inode),
6521 .clientid = clp->cl_clientid,
6522 .renew = 1, /* append RENEW */
6523 };
6524 struct nfs4_fsid_present_res res = {
6525 .renew = 1,
6526 };
6527 struct rpc_message msg = {
6528 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6529 .rpc_argp = &args,
6530 .rpc_resp = &res,
6531 .rpc_cred = cred,
6532 };
6533 unsigned long now = jiffies;
6534 int status;
6535
6536 res.fh = nfs_alloc_fhandle();
6537 if (res.fh == NULL)
6538 return -ENOMEM;
6539
6540 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6541 nfs4_set_sequence_privileged(&args.seq_args);
6542 status = nfs4_call_sync_sequence(clnt, server, &msg,
6543 &args.seq_args, &res.seq_res);
6544 nfs_free_fhandle(res.fh);
6545 if (status)
6546 return status;
6547
6548 do_renew_lease(clp, now);
6549 return 0;
6550}
6551
6552#ifdef CONFIG_NFS_V4_1
6553
6554/*
6555 * This operation also signals the server that this client is
6556 * performing "lease moved" recovery. The server can stop asserting
6557 * SEQ4_STATUS_LEASE_MOVED for this client. The client ID performing
6558 * this operation is identified in the SEQUENCE operation in this
6559 * compound.
6560 */
6561static int _nfs41_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6562{
6563 struct nfs_server *server = NFS_SERVER(inode);
6564 struct rpc_clnt *clnt = server->client;
6565 struct nfs4_fsid_present_arg args = {
6566 .fh = NFS_FH(inode),
6567 };
6568 struct nfs4_fsid_present_res res = {
6569 };
6570 struct rpc_message msg = {
6571 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FSID_PRESENT],
6572 .rpc_argp = &args,
6573 .rpc_resp = &res,
6574 .rpc_cred = cred,
6575 };
6576 int status;
6577
6578 res.fh = nfs_alloc_fhandle();
6579 if (res.fh == NULL)
6580 return -ENOMEM;
6581
6582 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
6583 nfs4_set_sequence_privileged(&args.seq_args);
6584 status = nfs4_call_sync_sequence(clnt, server, &msg,
6585 &args.seq_args, &res.seq_res);
6586 nfs_free_fhandle(res.fh);
6587 if (status == NFS4_OK &&
6588 res.seq_res.sr_status_flags & SEQ4_STATUS_LEASE_MOVED)
6589 status = -NFS4ERR_LEASE_MOVED;
6590 return status;
6591}
6592
6593#endif /* CONFIG_NFS_V4_1 */
6594
6595/**
6596 * nfs4_proc_fsid_present - Is this FSID present or absent on server?
6597 * @inode: inode on FSID to check
6598 * @cred: credential to use for this operation
6599 *
6600 * Server indicates whether the FSID is present, moved, or not
6601 * recognized. This operation is necessary to clear a LEASE_MOVED
6602 * condition for this client ID.
6603 *
6604 * Returns NFS4_OK if the FSID is present on this server,
6605 * -NFS4ERR_MOVED if the FSID is no longer present, a negative
6606 * NFS4ERR code if some error occurred on the server, or a
6607 * negative errno if a local failure occurred.
6608 */
6609int nfs4_proc_fsid_present(struct inode *inode, struct rpc_cred *cred)
6610{
6611 struct nfs_server *server = NFS_SERVER(inode);
6612 struct nfs_client *clp = server->nfs_client;
6613 const struct nfs4_mig_recovery_ops *ops =
6614 clp->cl_mvops->mig_recovery_ops;
6615 struct nfs4_exception exception = { };
6616 int status;
6617
6618 dprintk("%s: FSID %llx:%llx on \"%s\"\n", __func__,
6619 (unsigned long long)server->fsid.major,
6620 (unsigned long long)server->fsid.minor,
6621 clp->cl_hostname);
6622 nfs_display_fhandle(NFS_FH(inode), __func__);
6623
6624 do {
6625 status = ops->fsid_present(inode, cred);
6626 if (status != -NFS4ERR_DELAY)
6627 break;
6628 nfs4_handle_exception(server, status, &exception);
6629 } while (exception.retry);
6630 return status;
6631}
6632
5ec16a85 6633/**
a5250def
WAA		 6634 * If 'use_integrity' is true and the state managment nfs_client
6635 * cl_rpcclient is using krb5i/p, use the integrity protected cl_rpcclient
6636 * and the machine credential as per RFC3530bis and RFC5661 Security
6637 * Considerations sections. Otherwise, just use the user cred with the
6638 * filesystem's rpc_client.
5ec16a85 6639 */
a5250def 6640static int _nfs4_proc_secinfo(struct inode *dir, const struct qstr *name, struct nfs4_secinfo_flavors *flavors, bool use_integrity)
5a5ea0d4
BS		 6641{
6642 int status;
6643 struct nfs4_secinfo_arg args = {
6644 .dir_fh = NFS_FH(dir),
6645 .name = name,
6646 };
6647 struct nfs4_secinfo_res res = {
6648 .flavors = flavors,
6649 };
6650 struct rpc_message msg = {
6651 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO],
6652 .rpc_argp = &args,
6653 .rpc_resp = &res,
6654 };
a5250def 6655 struct rpc_clnt *clnt = NFS_SERVER(dir)->client;
7cb852df 6656 struct rpc_cred *cred = NULL;
a5250def
WAA		 6657
6658 if (use_integrity) {
6659 clnt = NFS_SERVER(dir)->nfs_client->cl_rpcclient;
7cb852df
WAA		 6660 cred = nfs4_get_clid_cred(NFS_SERVER(dir)->nfs_client);
6661 msg.rpc_cred = cred;
a5250def 6662 }
5a5ea0d4
BS		 6663
6664 dprintk("NFS call secinfo %s\n", name->name);
8b5bee2e
WAA		 6665
6666 nfs4_state_protect(NFS_SERVER(dir)->nfs_client,
6667 NFS_SP4_MACH_CRED_SECINFO, &clnt, &msg);
6668
a5250def
WAA		 6669 status = nfs4_call_sync(clnt, NFS_SERVER(dir), &msg, &args.seq_args,
6670 &res.seq_res, 0);
5a5ea0d4 6671 dprintk("NFS reply secinfo: %d\n", status);
a5250def 6672
7cb852df
WAA		 6673 if (cred)
6674 put_rpccred(cred);
a5250def 6675
5a5ea0d4
BS		 6676 return status;
6677}
6678
72de53ec
BS		 6679int nfs4_proc_secinfo(struct inode *dir, const struct qstr *name,
6680 struct nfs4_secinfo_flavors *flavors)
5a5ea0d4
BS		 6681{
6682 struct nfs4_exception exception = { };
6683 int err;
6684 do {
a5250def
WAA		 6685 err = -NFS4ERR_WRONGSEC;
6686
6687 /* try to use integrity protection with machine cred */
6688 if (_nfs4_is_integrity_protected(NFS_SERVER(dir)->nfs_client))
6689 err = _nfs4_proc_secinfo(dir, name, flavors, true);
6690
6691 /*
6692 * if unable to use integrity protection, or SECINFO with
6693 * integrity protection returns NFS4ERR_WRONGSEC (which is
6694 * disallowed by spec, but exists in deployed servers) use
6695 * the current filesystem's rpc_client and the user cred.
6696 */
6697 if (err == -NFS4ERR_WRONGSEC)
6698 err = _nfs4_proc_secinfo(dir, name, flavors, false);
6699
078ea3df
TM		 6700 trace_nfs4_secinfo(dir, name, err);
6701 err = nfs4_handle_exception(NFS_SERVER(dir), err,
5a5ea0d4
BS		 6702 &exception);
6703 } while (exception.retry);
6704 return err;
6705}
6706
557134a3 6707#ifdef CONFIG_NFS_V4_1
357f54d6
AA		 6708/*
6709 * Check the exchange flags returned by the server for invalid flags, having
6710 * both PNFS and NON_PNFS flags set, and not having one of NON_PNFS, PNFS, or
6711 * DS flags set.
6712 */
6713static int nfs4_check_cl_exchange_flags(u32 flags)
6714{
6715 if (flags & ~EXCHGID4_FLAG_MASK_R)
6716 goto out_inval;
6717 if ((flags & EXCHGID4_FLAG_USE_PNFS_MDS) &&
6718 (flags & EXCHGID4_FLAG_USE_NON_PNFS))
6719 goto out_inval;
6720 if (!(flags & (EXCHGID4_FLAG_MASK_PNFS)))
6721 goto out_inval;
6722 return NFS_OK;
6723out_inval:
6724 return -NFS4ERR_INVAL;
6725}
6726
78fe0f41 6727static bool
79d4e1f0
CL		 6728nfs41_same_server_scope(struct nfs41_server_scope *a,
6729 struct nfs41_server_scope *b)
78fe0f41
WAA		 6730{
6731 if (a->server_scope_sz == b->server_scope_sz &&
6732 memcmp(a->server_scope, b->server_scope, a->server_scope_sz) == 0)
6733 return true;
6734
6735 return false;
6736}
6737
7c44f1ae
WAA		 6738/*
6739 * nfs4_proc_bind_conn_to_session()
6740 *
6741 * The 4.1 client currently uses the same TCP connection for the
6742 * fore and backchannel.
6743 */
2cf047c9 6744int nfs4_proc_bind_conn_to_session(struct nfs_client *clp, struct rpc_cred *cred)
7c44f1ae
WAA		 6745{
6746 int status;
71a097c6
TM		 6747 struct nfs41_bind_conn_to_session_args args = {
6748 .client = clp,
6749 .dir = NFS4_CDFC4_FORE_OR_BOTH,
6750 };
7c44f1ae
WAA		 6751 struct nfs41_bind_conn_to_session_res res;
6752 struct rpc_message msg = {
6753 .rpc_proc =
6754 &nfs4_procedures[NFSPROC4_CLNT_BIND_CONN_TO_SESSION],
71a097c6 6755 .rpc_argp = &args,
7c44f1ae 6756 .rpc_resp = &res,
2cf047c9 6757 .rpc_cred = cred,
7c44f1ae
WAA		 6758 };
6759
6760 dprintk("--> %s\n", __func__);
7c44f1ae 6761
71a097c6
TM		 6762 nfs4_copy_sessionid(&args.sessionid, &clp->cl_session->sess_id);
6763 if (!(clp->cl_session->flags & SESSION4_BACK_CHAN))
6764 args.dir = NFS4_CDFC4_FORE;
7c44f1ae
WAA		 6765
6766 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6767 trace_nfs4_bind_conn_to_session(clp, status);
7c44f1ae 6768 if (status == 0) {
71a097c6 6769 if (memcmp(res.sessionid.data,
7c44f1ae
WAA		 6770 clp->cl_session->sess_id.data, NFS4_MAX_SESSIONID_LEN)) {
6771 dprintk("NFS: %s: Session ID mismatch\n", __func__);
6772 status = -EIO;
71a097c6 6773 goto out;
7c44f1ae 6774 }
71a097c6 6775 if ((res.dir & args.dir) != res.dir || res.dir == 0) {
7c44f1ae
WAA		 6776 dprintk("NFS: %s: Unexpected direction from server\n",
6777 __func__);
6778 status = -EIO;
71a097c6 6779 goto out;
7c44f1ae 6780 }
71a097c6 6781 if (res.use_conn_in_rdma_mode != args.use_conn_in_rdma_mode) {
7c44f1ae
WAA		 6782 dprintk("NFS: %s: Server returned RDMA mode = true\n",
6783 __func__);
6784 status = -EIO;
71a097c6 6785 goto out;
7c44f1ae
WAA		 6786 }
6787 }
7c44f1ae
WAA		 6788out:
6789 dprintk("<-- %s status= %d\n", __func__, status);
6790 return status;
6791}
6792
99fe60d0 6793/*
fa940720
WAA		 6794 * Minimum set of SP4_MACH_CRED operations from RFC 5661 in the enforce map
6795 * and operations we'd like to see to enable certain features in the allow map
2031cd1a
WAA		 6796 */
6797static const struct nfs41_state_protection nfs4_sp4_mach_cred_request = {
6798 .how = SP4_MACH_CRED,
6799 .enforce.u.words = {
6800 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6801 1 << (OP_EXCHANGE_ID - 32) |
6802 1 << (OP_CREATE_SESSION - 32) |
6803 1 << (OP_DESTROY_SESSION - 32) |
6804 1 << (OP_DESTROY_CLIENTID - 32)
fa940720
WAA		 6805 },
6806 .allow.u.words = {
6807 [0] = 1 << (OP_CLOSE) |
a0279625
WAA		 6808 1 << (OP_LOCKU) |
6809 1 << (OP_COMMIT),
8b5bee2e 6810 [1] = 1 << (OP_SECINFO - 32) |
3787d506
WAA		 6811 1 << (OP_SECINFO_NO_NAME - 32) |
6812 1 << (OP_TEST_STATEID - 32) |
a0279625
WAA		 6813 1 << (OP_FREE_STATEID - 32) |
6814 1 << (OP_WRITE - 32)
2031cd1a
WAA		 6815 }
6816};
6817
6818/*
6819 * Select the state protection mode for client `clp' given the server results
6820 * from exchange_id in `sp'.
99fe60d0 6821 *
2031cd1a
WAA		 6822 * Returns 0 on success, negative errno otherwise.
6823 */
6824static int nfs4_sp4_select_mode(struct nfs_client *clp,
6825 struct nfs41_state_protection *sp)
6826{
6827 static const u32 supported_enforce[NFS4_OP_MAP_NUM_WORDS] = {
6828 [1] = 1 << (OP_BIND_CONN_TO_SESSION - 32) |
6829 1 << (OP_EXCHANGE_ID - 32) |
6830 1 << (OP_CREATE_SESSION - 32) |
6831 1 << (OP_DESTROY_SESSION - 32) |
6832 1 << (OP_DESTROY_CLIENTID - 32)
6833 };
6834 unsigned int i;
6835
6836 if (sp->how == SP4_MACH_CRED) {
6837 /* Print state protect result */
6838 dfprintk(MOUNT, "Server SP4_MACH_CRED support:\n");
6839 for (i = 0; i <= LAST_NFS4_OP; i++) {
6840 if (test_bit(i, sp->enforce.u.longs))
6841 dfprintk(MOUNT, " enforce op %d\n", i);
6842 if (test_bit(i, sp->allow.u.longs))
6843 dfprintk(MOUNT, " allow op %d\n", i);
6844 }
6845
6846 /* make sure nothing is on enforce list that isn't supported */
6847 for (i = 0; i < NFS4_OP_MAP_NUM_WORDS; i++) {
6848 if (sp->enforce.u.words[i] & ~supported_enforce[i]) {
6849 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6850 return -EINVAL;
6851 }
6852 }
6853
6854 /*
6855 * Minimal mode - state operations are allowed to use machine
6856 * credential. Note this already happens by default, so the
6857 * client doesn't have to do anything more than the negotiation.
6858 *
6859 * NOTE: we don't care if EXCHANGE_ID is in the list -
6860 * we're already using the machine cred for exchange_id
6861 * and will never use a different cred.
6862 */
6863 if (test_bit(OP_BIND_CONN_TO_SESSION, sp->enforce.u.longs) &&
6864 test_bit(OP_CREATE_SESSION, sp->enforce.u.longs) &&
6865 test_bit(OP_DESTROY_SESSION, sp->enforce.u.longs) &&
6866 test_bit(OP_DESTROY_CLIENTID, sp->enforce.u.longs)) {
6867 dfprintk(MOUNT, "sp4_mach_cred:\n");
6868 dfprintk(MOUNT, " minimal mode enabled\n");
6869 set_bit(NFS_SP4_MACH_CRED_MINIMAL, &clp->cl_sp4_flags);
6870 } else {
6871 dfprintk(MOUNT, "sp4_mach_cred: disabled\n");
6872 return -EINVAL;
6873 }
fa940720
WAA		 6874
6875 if (test_bit(OP_CLOSE, sp->allow.u.longs) &&
6876 test_bit(OP_LOCKU, sp->allow.u.longs)) {
6877 dfprintk(MOUNT, " cleanup mode enabled\n");
6878 set_bit(NFS_SP4_MACH_CRED_CLEANUP, &clp->cl_sp4_flags);
6879 }
8b5bee2e
WAA		 6880
6881 if (test_bit(OP_SECINFO, sp->allow.u.longs) &&
6882 test_bit(OP_SECINFO_NO_NAME, sp->allow.u.longs)) {
6883 dfprintk(MOUNT, " secinfo mode enabled\n");
6884 set_bit(NFS_SP4_MACH_CRED_SECINFO, &clp->cl_sp4_flags);
6885 }
3787d506
WAA		 6886
6887 if (test_bit(OP_TEST_STATEID, sp->allow.u.longs) &&
6888 test_bit(OP_FREE_STATEID, sp->allow.u.longs)) {
6889 dfprintk(MOUNT, " stateid mode enabled\n");
6890 set_bit(NFS_SP4_MACH_CRED_STATEID, &clp->cl_sp4_flags);
6891 }
8c21c62c
WAA		 6892
6893 if (test_bit(OP_WRITE, sp->allow.u.longs)) {
6894 dfprintk(MOUNT, " write mode enabled\n");
6895 set_bit(NFS_SP4_MACH_CRED_WRITE, &clp->cl_sp4_flags);
6896 }
6897
6898 if (test_bit(OP_COMMIT, sp->allow.u.longs)) {
6899 dfprintk(MOUNT, " commit mode enabled\n");
6900 set_bit(NFS_SP4_MACH_CRED_COMMIT, &clp->cl_sp4_flags);
6901 }
2031cd1a
WAA		 6902 }
6903
6904 return 0;
6905}
6906
6907/*
6908 * _nfs4_proc_exchange_id()
6bbb4ae8 6909 *
2031cd1a 6910 * Wrapper for EXCHANGE_ID operation.
99fe60d0 6911 */
2031cd1a
WAA		 6912static int _nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred,
6913 u32 sp4_how)
99fe60d0
BH		 6914{
6915 nfs4_verifier verifier;
6916 struct nfs41_exchange_id_args args = {
cd93710e 6917 .verifier = &verifier,
99fe60d0 6918 .client = clp,
cd3fadec 6919#ifdef CONFIG_NFS_V4_1_MIGRATION
4f0b429d 6920 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
cd3fadec
CL		 6921 EXCHGID4_FLAG_BIND_PRINC_STATEID |
6922 EXCHGID4_FLAG_SUPP_MOVED_MIGR,
6923#else
6924 .flags = EXCHGID4_FLAG_SUPP_MOVED_REFER |
6925 EXCHGID4_FLAG_BIND_PRINC_STATEID,
6926#endif
99fe60d0
BH		 6927 };
6928 struct nfs41_exchange_id_res res = {
32b01310 6929 0
99fe60d0
BH		 6930 };
6931 int status;
6932 struct rpc_message msg = {
6933 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_EXCHANGE_ID],
6934 .rpc_argp = &args,
6935 .rpc_resp = &res,
6936 .rpc_cred = cred,
6937 };
99fe60d0 6938
f092075d 6939 nfs4_init_boot_verifier(clp, &verifier);
873e3851
JL		 6940
6941 status = nfs4_init_uniform_client_string(clp);
6942 if (status)
3a6bb738 6943 goto out;
3a6bb738
JL		 6944
6945 dprintk("NFS call exchange_id auth=%s, '%s'\n",
6bbb4ae8 6946 clp->cl_rpcclient->cl_auth->au_ops->au_name,
3a6bb738 6947 clp->cl_owner_id);
99fe60d0 6948
acdeb69d 6949 res.server_owner = kzalloc(sizeof(struct nfs41_server_owner),
bbafffd2 6950 GFP_NOFS);
acdeb69d 6951 if (unlikely(res.server_owner == NULL)) {
abe9a6d5
WAA		 6952 status = -ENOMEM;
6953 goto out;
6954 }
78fe0f41 6955
79d4e1f0 6956 res.server_scope = kzalloc(sizeof(struct nfs41_server_scope),
bbafffd2 6957 GFP_NOFS);
177313f1 6958 if (unlikely(res.server_scope == NULL)) {
abe9a6d5 6959 status = -ENOMEM;
acdeb69d 6960 goto out_server_owner;
abe9a6d5 6961 }
78fe0f41 6962
bbafffd2 6963 res.impl_id = kzalloc(sizeof(struct nfs41_impl_id), GFP_NOFS);
177313f1 6964 if (unlikely(res.impl_id == NULL)) {
7d2ed9ac
WAA		 6965 status = -ENOMEM;
6966 goto out_server_scope;
6967 }
6968
2031cd1a
WAA		 6969 switch (sp4_how) {
6970 case SP4_NONE:
6971 args.state_protect.how = SP4_NONE;
6972 break;
6973
6974 case SP4_MACH_CRED:
6975 args.state_protect = nfs4_sp4_mach_cred_request;
6976 break;
6977
6978 default:
6979 /* unsupported! */
6980 WARN_ON_ONCE(1);
6981 status = -EINVAL;
6b55970b 6982 goto out_impl_id;
2031cd1a
WAA		 6983 }
6984
1bd714f2 6985 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 6986 trace_nfs4_exchange_id(clp, status);
177313f1 6987 if (status == 0)
32b01310 6988 status = nfs4_check_cl_exchange_flags(res.flags);
78fe0f41 6989
2031cd1a
WAA		 6990 if (status == 0)
6991 status = nfs4_sp4_select_mode(clp, &res.state_protect);
6992
acdeb69d 6993 if (status == 0) {
32b01310 6994 clp->cl_clientid = res.clientid;
e11259f9
TM		 6995 clp->cl_exchange_flags = res.flags;
6996 /* Client ID is not confirmed */
6997 if (!(res.flags & EXCHGID4_FLAG_CONFIRMED_R)) {
6998 clear_bit(NFS4_SESSION_ESTABLISHED,
6999 &clp->cl_session->session_state);
32b01310 7000 clp->cl_seqid = res.seqid;
e11259f9 7001 }
32b01310 7002
acdeb69d
CL		 7003 kfree(clp->cl_serverowner);
7004 clp->cl_serverowner = res.server_owner;
7005 res.server_owner = NULL;
78fe0f41 7006
7d2ed9ac 7007 /* use the most recent implementation id */
59155546
CL		 7008 kfree(clp->cl_implid);
7009 clp->cl_implid = res.impl_id;
6b55970b 7010 res.impl_id = NULL;
7d2ed9ac 7011
177313f1 7012 if (clp->cl_serverscope != NULL &&
79d4e1f0 7013 !nfs41_same_server_scope(clp->cl_serverscope,
78fe0f41
WAA		 7014 res.server_scope)) {
7015 dprintk("%s: server_scope mismatch detected\n",
7016 __func__);
7017 set_bit(NFS4CLNT_SERVER_SCOPE_MISMATCH, &clp->cl_state);
79d4e1f0
CL		 7018 kfree(clp->cl_serverscope);
7019 clp->cl_serverscope = NULL;
78fe0f41
WAA		 7020 }
7021
177313f1 7022 if (clp->cl_serverscope == NULL) {
79d4e1f0 7023 clp->cl_serverscope = res.server_scope;
6b55970b 7024 res.server_scope = NULL;
abe9a6d5 7025 }
6b55970b 7026 }
7d2ed9ac 7027
6b55970b
KM		 7028out_impl_id:
7029 kfree(res.impl_id);
7d2ed9ac 7030out_server_scope:
abe9a6d5 7031 kfree(res.server_scope);
6b55970b
KM		 7032out_server_owner:
7033 kfree(res.server_owner);
abe9a6d5 7034out:
177313f1 7035 if (clp->cl_implid != NULL)
6bbb4ae8 7036 dprintk("NFS reply exchange_id: Server Implementation ID: "
7d2ed9ac 7037 "domain: %s, name: %s, date: %llu,%u\n",
6bbb4ae8 7038 clp->cl_implid->domain, clp->cl_implid->name,
59155546
CL		 7039 clp->cl_implid->date.seconds,
7040 clp->cl_implid->date.nseconds);
6bbb4ae8 7041 dprintk("NFS reply exchange_id: %d\n", status);
99fe60d0
BH		 7042 return status;
7043}
7044
2031cd1a
WAA		 7045/*
7046 * nfs4_proc_exchange_id()
7047 *
7048 * Returns zero, a negative errno, or a negative NFS4ERR status code.
7049 *
7050 * Since the clientid has expired, all compounds using sessions
7051 * associated with the stale clientid will be returning
7052 * NFS4ERR_BADSESSION in the sequence operation, and will therefore
7053 * be in some phase of session reset.
7054 *
7055 * Will attempt to negotiate SP4_MACH_CRED if krb5i / krb5p auth is used.
7056 */
7057int nfs4_proc_exchange_id(struct nfs_client *clp, struct rpc_cred *cred)
7058{
7059 rpc_authflavor_t authflavor = clp->cl_rpcclient->cl_auth->au_flavor;
7060 int status;
7061
7062 /* try SP4_MACH_CRED if krb5i/p */
7063 if (authflavor == RPC_AUTH_GSS_KRB5I ||
7064 authflavor == RPC_AUTH_GSS_KRB5P) {
7065 status = _nfs4_proc_exchange_id(clp, cred, SP4_MACH_CRED);
7066 if (!status)
7067 return 0;
7068 }
7069
7070 /* try SP4_NONE */
7071 return _nfs4_proc_exchange_id(clp, cred, SP4_NONE);
7072}
7073
66245539
TM		 7074static int _nfs4_proc_destroy_clientid(struct nfs_client *clp,
7075 struct rpc_cred *cred)
7076{
7077 struct rpc_message msg = {
7078 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_CLIENTID],
7079 .rpc_argp = clp,
7080 .rpc_cred = cred,
7081 };
7082 int status;
7083
7084 status = rpc_call_sync(clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7085 trace_nfs4_destroy_clientid(clp, status);
66245539 7086 if (status)
02c67525 7087 dprintk("NFS: Got error %d from the server %s on "
66245539
TM		 7088 "DESTROY_CLIENTID.", status, clp->cl_hostname);
7089 return status;
7090}
7091
7092static int nfs4_proc_destroy_clientid(struct nfs_client *clp,
7093 struct rpc_cred *cred)
7094{
7095 unsigned int loop;
7096 int ret;
7097
7098 for (loop = NFS4_MAX_LOOP_ON_RECOVER; loop != 0; loop--) {
7099 ret = _nfs4_proc_destroy_clientid(clp, cred);
7100 switch (ret) {
7101 case -NFS4ERR_DELAY:
7102 case -NFS4ERR_CLIENTID_BUSY:
7103 ssleep(1);
7104 break;
7105 default:
7106 return ret;
7107 }
7108 }
7109 return 0;
7110}
7111
7112int nfs4_destroy_clientid(struct nfs_client *clp)
7113{
7114 struct rpc_cred *cred;
7115 int ret = 0;
7116
7117 if (clp->cl_mvops->minor_version < 1)
7118 goto out;
7119 if (clp->cl_exchange_flags == 0)
7120 goto out;
05f4c350
CL		 7121 if (clp->cl_preserve_clid)
7122 goto out;
73d8bde5 7123 cred = nfs4_get_clid_cred(clp);
66245539
TM		 7124 ret = nfs4_proc_destroy_clientid(clp, cred);
7125 if (cred)
7126 put_rpccred(cred);
7127 switch (ret) {
7128 case 0:
7129 case -NFS4ERR_STALE_CLIENTID:
7130 clp->cl_exchange_flags = 0;
7131 }
7132out:
7133 return ret;
7134}
7135
2050f0cc
AA		 7136struct nfs4_get_lease_time_data {
7137 struct nfs4_get_lease_time_args *args;
7138 struct nfs4_get_lease_time_res *res;
7139 struct nfs_client *clp;
7140};
7141
7142static void nfs4_get_lease_time_prepare(struct rpc_task *task,
7143 void *calldata)
7144{
2050f0cc
AA		 7145 struct nfs4_get_lease_time_data *data =
7146 (struct nfs4_get_lease_time_data *)calldata;
7147
7148 dprintk("--> %s\n", __func__);
7149 /* just setup sequence, do not trigger session recovery
7150 since we're invoked within one */
d9afbd1b
TM		 7151 nfs41_setup_sequence(data->clp->cl_session,
7152 &data->args->la_seq_args,
7153 &data->res->lr_seq_res,
7154 task);
2050f0cc
AA		 7155 dprintk("<-- %s\n", __func__);
7156}
7157
7158/*
7159 * Called from nfs4_state_manager thread for session setup, so don't recover
7160 * from sequence operation or clientid errors.
7161 */
7162static void nfs4_get_lease_time_done(struct rpc_task *task, void *calldata)
7163{
7164 struct nfs4_get_lease_time_data *data =
7165 (struct nfs4_get_lease_time_data *)calldata;
7166
7167 dprintk("--> %s\n", __func__);
14516c3a
TM		 7168 if (!nfs41_sequence_done(task, &data->res->lr_seq_res))
7169 return;
2050f0cc
AA		 7170 switch (task->tk_status) {
7171 case -NFS4ERR_DELAY:
7172 case -NFS4ERR_GRACE:
7173 dprintk("%s Retry: tk_status %d\n", __func__, task->tk_status);
7174 rpc_delay(task, NFS4_POLL_RETRY_MIN);
7175 task->tk_status = 0;
a8a4ae3a
AA		 7176 /* fall through */
7177 case -NFS4ERR_RETRY_UNCACHED_REP:
d00c5d43 7178 rpc_restart_call_prepare(task);
2050f0cc
AA		 7179 return;
7180 }
2050f0cc
AA		 7181 dprintk("<-- %s\n", __func__);
7182}
7183
17280175 7184static const struct rpc_call_ops nfs4_get_lease_time_ops = {
2050f0cc
AA		 7185 .rpc_call_prepare = nfs4_get_lease_time_prepare,
7186 .rpc_call_done = nfs4_get_lease_time_done,
7187};
7188
7189int nfs4_proc_get_lease_time(struct nfs_client *clp, struct nfs_fsinfo *fsinfo)
7190{
7191 struct rpc_task *task;
7192 struct nfs4_get_lease_time_args args;
7193 struct nfs4_get_lease_time_res res = {
7194 .lr_fsinfo = fsinfo,
7195 };
7196 struct nfs4_get_lease_time_data data = {
7197 .args = &args,
7198 .res = &res,
7199 .clp = clp,
7200 };
7201 struct rpc_message msg = {
7202 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GET_LEASE_TIME],
7203 .rpc_argp = &args,
7204 .rpc_resp = &res,
7205 };
7206 struct rpc_task_setup task_setup = {
7207 .rpc_client = clp->cl_rpcclient,
7208 .rpc_message = &msg,
7209 .callback_ops = &nfs4_get_lease_time_ops,
1bd714f2
TM		 7210 .callback_data = &data,
7211 .flags = RPC_TASK_TIMEOUT,
2050f0cc
AA		 7212 };
7213 int status;
7214
a9c92d6b 7215 nfs4_init_sequence(&args.la_seq_args, &res.lr_seq_res, 0);
8fe72bac 7216 nfs4_set_sequence_privileged(&args.la_seq_args);
2050f0cc
AA		 7217 dprintk("--> %s\n", __func__);
7218 task = rpc_run_task(&task_setup);
7219
7220 if (IS_ERR(task))
7221 status = PTR_ERR(task);
7222 else {
7223 status = task->tk_status;
7224 rpc_put_task(task);
7225 }
7226 dprintk("<-- %s return %d\n", __func__, status);
7227
7228 return status;
7229}
7230
fc931582
AA		 7231/*
7232 * Initialize the values to be used by the client in CREATE_SESSION
7233 * If nfs4_init_session set the fore channel request and response sizes,
7234 * use them.
7235 *
7236 * Set the back channel max_resp_sz_cached to zero to force the client to
7237 * always set csa_cachethis to FALSE because the current implementation
7238 * of the back channel DRC only supports caching the CB_SEQUENCE operation.
7239 */
7240static void nfs4_init_channel_attrs(struct nfs41_create_session_args *args)
7241{
18aad3d5
AA		 7242 unsigned int max_rqst_sz, max_resp_sz;
7243
7244 max_rqst_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxwrite_overhead;
7245 max_resp_sz = NFS_MAX_FILE_IO_SIZE + nfs41_maxread_overhead;
fc931582 7246
fc931582 7247 /* Fore channel attributes */
18aad3d5
AA		 7248 args->fc_attrs.max_rqst_sz = max_rqst_sz;
7249 args->fc_attrs.max_resp_sz = max_resp_sz;
fc931582 7250 args->fc_attrs.max_ops = NFS4_MAX_OPS;
ef159e91 7251 args->fc_attrs.max_reqs = max_session_slots;
fc931582
AA		 7252
7253 dprintk("%s: Fore Channel : max_rqst_sz=%u max_resp_sz=%u "
8e0d46e1 7254 "max_ops=%u max_reqs=%u\n",
fc931582
AA		 7255 __func__,
7256 args->fc_attrs.max_rqst_sz, args->fc_attrs.max_resp_sz,
8e0d46e1 7257 args->fc_attrs.max_ops, args->fc_attrs.max_reqs);
fc931582
AA		 7258
7259 /* Back channel attributes */
fc931582
AA		 7260 args->bc_attrs.max_rqst_sz = PAGE_SIZE;
7261 args->bc_attrs.max_resp_sz = PAGE_SIZE;
7262 args->bc_attrs.max_resp_sz_cached = 0;
7263 args->bc_attrs.max_ops = NFS4_MAX_BACK_CHANNEL_OPS;
7264 args->bc_attrs.max_reqs = 1;
7265
7266 dprintk("%s: Back Channel : max_rqst_sz=%u max_resp_sz=%u "
7267 "max_resp_sz_cached=%u max_ops=%u max_reqs=%u\n",
7268 __func__,
7269 args->bc_attrs.max_rqst_sz, args->bc_attrs.max_resp_sz,
7270 args->bc_attrs.max_resp_sz_cached, args->bc_attrs.max_ops,
7271 args->bc_attrs.max_reqs);
7272}
7273
79969dd1
TM		 7274static int nfs4_verify_fore_channel_attrs(struct nfs41_create_session_args *args,
7275 struct nfs41_create_session_res *res)
8d35301d 7276{
43c2e885 7277 struct nfs4_channel_attrs *sent = &args->fc_attrs;
79969dd1 7278 struct nfs4_channel_attrs *rcvd = &res->fc_attrs;
43c2e885 7279
43c2e885
BF		 7280 if (rcvd->max_resp_sz > sent->max_resp_sz)
7281 return -EINVAL;
7282 /*
7283 * Our requested max_ops is the minimum we need; we're not
7284 * prepared to break up compounds into smaller pieces than that.
7285 * So, no point even trying to continue if the server won't
7286 * cooperate:
7287 */
7288 if (rcvd->max_ops < sent->max_ops)
7289 return -EINVAL;
7290 if (rcvd->max_reqs == 0)
7291 return -EINVAL;
b4b9a0c1
VG		 7292 if (rcvd->max_reqs > NFS4_MAX_SLOT_TABLE)
7293 rcvd->max_reqs = NFS4_MAX_SLOT_TABLE;
43c2e885 7294 return 0;
8d35301d
AA		 7295}
7296
79969dd1
TM		 7297static int nfs4_verify_back_channel_attrs(struct nfs41_create_session_args *args,
7298 struct nfs41_create_session_res *res)
43c2e885
BF		 7299{
7300 struct nfs4_channel_attrs *sent = &args->bc_attrs;
79969dd1 7301 struct nfs4_channel_attrs *rcvd = &res->bc_attrs;
8d35301d 7302
b1c0df5f
TM		 7303 if (!(res->flags & SESSION4_BACK_CHAN))
7304 goto out;
43c2e885
BF		 7305 if (rcvd->max_rqst_sz > sent->max_rqst_sz)
7306 return -EINVAL;
7307 if (rcvd->max_resp_sz < sent->max_resp_sz)
7308 return -EINVAL;
7309 if (rcvd->max_resp_sz_cached > sent->max_resp_sz_cached)
7310 return -EINVAL;
7311 /* These would render the backchannel useless: */
b4b9a0c1 7312 if (rcvd->max_ops != sent->max_ops)
43c2e885 7313 return -EINVAL;
b4b9a0c1 7314 if (rcvd->max_reqs != sent->max_reqs)
43c2e885 7315 return -EINVAL;
b1c0df5f 7316out:
43c2e885
BF		 7317 return 0;
7318}
8d35301d 7319
8d35301d 7320static int nfs4_verify_channel_attrs(struct nfs41_create_session_args *args,
79969dd1 7321 struct nfs41_create_session_res *res)
8d35301d 7322{
43c2e885 7323 int ret;
8d35301d 7324
79969dd1 7325 ret = nfs4_verify_fore_channel_attrs(args, res);
43c2e885
BF		 7326 if (ret)
7327 return ret;
79969dd1
TM		 7328 return nfs4_verify_back_channel_attrs(args, res);
7329}
7330
7331static void nfs4_update_session(struct nfs4_session *session,
7332 struct nfs41_create_session_res *res)
7333{
7334 nfs4_copy_sessionid(&session->sess_id, &res->sessionid);
e11259f9
TM		 7335 /* Mark client id and session as being confirmed */
7336 session->clp->cl_exchange_flags |= EXCHGID4_FLAG_CONFIRMED_R;
7337 set_bit(NFS4_SESSION_ESTABLISHED, &session->session_state);
79969dd1
TM		 7338 session->flags = res->flags;
7339 memcpy(&session->fc_attrs, &res->fc_attrs, sizeof(session->fc_attrs));
b1c0df5f
TM		 7340 if (res->flags & SESSION4_BACK_CHAN)
7341 memcpy(&session->bc_attrs, &res->bc_attrs,
7342 sizeof(session->bc_attrs));
8d35301d
AA		 7343}
7344
848f5bda
TM		 7345static int _nfs4_proc_create_session(struct nfs_client *clp,
7346 struct rpc_cred *cred)
fc931582
AA		 7347{
7348 struct nfs4_session *session = clp->cl_session;
7349 struct nfs41_create_session_args args = {
7350 .client = clp,
79969dd1
TM		 7351 .clientid = clp->cl_clientid,
7352 .seqid = clp->cl_seqid,
fc931582
AA		 7353 .cb_program = NFS4_CALLBACK,
7354 };
79969dd1
TM		 7355 struct nfs41_create_session_res res;
7356
fc931582
AA		 7357 struct rpc_message msg = {
7358 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_CREATE_SESSION],
7359 .rpc_argp = &args,
7360 .rpc_resp = &res,
848f5bda 7361 .rpc_cred = cred,
fc931582
AA		 7362 };
7363 int status;
7364
7365 nfs4_init_channel_attrs(&args);
0f91421e 7366 args.flags = (SESSION4_PERSIST | SESSION4_BACK_CHAN);
fc931582 7367
1bd714f2 7368 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7369 trace_nfs4_create_session(clp, status);
fc931582 7370
43095d39 7371 if (!status) {
8d35301d 7372 /* Verify the session's negotiated channel_attrs values */
79969dd1 7373 status = nfs4_verify_channel_attrs(&args, &res);
fc931582 7374 /* Increment the clientid slot sequence id */
79969dd1
TM		 7375 if (clp->cl_seqid == res.seqid)
7376 clp->cl_seqid++;
7377 if (status)
7378 goto out;
7379 nfs4_update_session(session, &res);
fc931582 7380 }
79969dd1 7381out:
fc931582
AA		 7382 return status;
7383}
7384
7385/*
7386 * Issues a CREATE_SESSION operation to the server.
7387 * It is the responsibility of the caller to verify the session is
7388 * expired before calling this routine.
7389 */
848f5bda 7390int nfs4_proc_create_session(struct nfs_client *clp, struct rpc_cred *cred)
fc931582
AA		 7391{
7392 int status;
7393 unsigned *ptr;
fc931582
AA		 7394 struct nfs4_session *session = clp->cl_session;
7395
7396 dprintk("--> %s clp=%p session=%p\n", __func__, clp, session);
7397
848f5bda 7398 status = _nfs4_proc_create_session(clp, cred);
fc931582
AA		 7399 if (status)
7400 goto out;
7401
aacd5537
AA		 7402 /* Init or reset the session slot tables */
7403 status = nfs4_setup_session_slot_tables(session);
7404 dprintk("slot table setup returned %d\n", status);
fc931582
AA		 7405 if (status)
7406 goto out;
7407
7408 ptr = (unsigned *)&session->sess_id.data[0];
7409 dprintk("%s client>seqid %d sessionid %u:%u:%u:%u\n", __func__,
7410 clp->cl_seqid, ptr[0], ptr[1], ptr[2], ptr[3]);
fc931582
AA		 7411out:
7412 dprintk("<-- %s\n", __func__);
7413 return status;
7414}
7415
0f3e66c6
AA		 7416/*
7417 * Issue the over-the-wire RPC DESTROY_SESSION.
7418 * The caller must serialize access to this routine.
7419 */
848f5bda
TM		 7420int nfs4_proc_destroy_session(struct nfs4_session *session,
7421 struct rpc_cred *cred)
0f3e66c6 7422{
848f5bda
TM		 7423 struct rpc_message msg = {
7424 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_DESTROY_SESSION],
7425 .rpc_argp = session,
7426 .rpc_cred = cred,
7427 };
0f3e66c6 7428 int status = 0;
0f3e66c6
AA		 7429
7430 dprintk("--> nfs4_proc_destroy_session\n");
7431
7432 /* session is still being setup */
e11259f9
TM		 7433 if (!test_and_clear_bit(NFS4_SESSION_ESTABLISHED, &session->session_state))
7434 return 0;
0f3e66c6 7435
1bd714f2 7436 status = rpc_call_sync(session->clp->cl_rpcclient, &msg, RPC_TASK_TIMEOUT);
c6d01c6f 7437 trace_nfs4_destroy_session(session->clp, status);
0f3e66c6
AA		 7438
7439 if (status)
08106ac7 7440 dprintk("NFS: Got error %d from the server on DESTROY_SESSION. "
0f3e66c6
AA		 7441 "Session has been destroyed regardless...\n", status);
7442
7443 dprintk("<-- nfs4_proc_destroy_session\n");
7444 return status;
7445}
7446
fc01cea9
AA		 7447/*
7448 * Renew the cl_session lease.
7449 */
d5f8d3fe
TM		 7450struct nfs4_sequence_data {
7451 struct nfs_client *clp;
7452 struct nfs4_sequence_args args;
7453 struct nfs4_sequence_res res;
7454};
7455
dc96aef9
AB		 7456static void nfs41_sequence_release(void *data)
7457{
d5f8d3fe
TM		 7458 struct nfs4_sequence_data *calldata = data;
7459 struct nfs_client *clp = calldata->clp;
dc96aef9 7460
7135840f
AB		 7461 if (atomic_read(&clp->cl_count) > 1)
7462 nfs4_schedule_state_renewal(clp);
7463 nfs_put_client(clp);
d5f8d3fe 7464 kfree(calldata);
dc96aef9
AB		 7465}
7466
aa5190d0
TM		 7467static int nfs41_sequence_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7468{
7469 switch(task->tk_status) {
7470 case -NFS4ERR_DELAY:
aa5190d0
TM		 7471 rpc_delay(task, NFS4_POLL_RETRY_MAX);
7472 return -EAGAIN;
7473 default:
0400a6b0 7474 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7475 }
7476 return 0;
7477}
7478
dc96aef9 7479static void nfs41_sequence_call_done(struct rpc_task *task, void *data)
fc01cea9 7480{
d5f8d3fe
TM		 7481 struct nfs4_sequence_data *calldata = data;
7482 struct nfs_client *clp = calldata->clp;
fc01cea9 7483
14516c3a
TM		 7484 if (!nfs41_sequence_done(task, task->tk_msg.rpc_resp))
7485 return;
fc01cea9 7486
c6d01c6f 7487 trace_nfs4_sequence(clp, task->tk_status);
fc01cea9
AA		 7488 if (task->tk_status < 0) {
7489 dprintk("%s ERROR %d\n", __func__, task->tk_status);
7135840f
AB		 7490 if (atomic_read(&clp->cl_count) == 1)
7491 goto out;
fc01cea9 7492
aa5190d0
TM		 7493 if (nfs41_sequence_handle_errors(task, clp) == -EAGAIN) {
7494 rpc_restart_call_prepare(task);
fc01cea9
AA		 7495 return;
7496 }
7497 }
fc01cea9 7498 dprintk("%s rpc_cred %p\n", __func__, task->tk_msg.rpc_cred);
7135840f 7499out:
fc01cea9
AA		 7500 dprintk("<-- %s\n", __func__);
7501}
7502
7503static void nfs41_sequence_prepare(struct rpc_task *task, void *data)
7504{
d5f8d3fe
TM		 7505 struct nfs4_sequence_data *calldata = data;
7506 struct nfs_client *clp = calldata->clp;
fc01cea9
AA		 7507 struct nfs4_sequence_args *args;
7508 struct nfs4_sequence_res *res;
7509
fc01cea9
AA		 7510 args = task->tk_msg.rpc_argp;
7511 res = task->tk_msg.rpc_resp;
7512
d9afbd1b 7513 nfs41_setup_sequence(clp->cl_session, args, res, task);
fc01cea9
AA		 7514}
7515
7516static const struct rpc_call_ops nfs41_sequence_ops = {
7517 .rpc_call_done = nfs41_sequence_call_done,
7518 .rpc_call_prepare = nfs41_sequence_prepare,
dc96aef9 7519 .rpc_release = nfs41_sequence_release,
fc01cea9
AA		 7520};
7521
8fe72bac
TM		 7522static struct rpc_task *_nfs41_proc_sequence(struct nfs_client *clp,
7523 struct rpc_cred *cred,
7524 bool is_privileged)
fc01cea9 7525{
d5f8d3fe 7526 struct nfs4_sequence_data *calldata;
fc01cea9
AA		 7527 struct rpc_message msg = {
7528 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SEQUENCE],
7529 .rpc_cred = cred,
7530 };
71ac6da9
TM		 7531 struct rpc_task_setup task_setup_data = {
7532 .rpc_client = clp->cl_rpcclient,
7533 .rpc_message = &msg,
8fe72bac 7534 .callback_ops = &nfs41_sequence_ops,
bc7a05ca 7535 .flags = RPC_TASK_ASYNC | RPC_TASK_TIMEOUT,
71ac6da9 7536 };
fc01cea9 7537
7135840f 7538 if (!atomic_inc_not_zero(&clp->cl_count))
71ac6da9 7539 return ERR_PTR(-EIO);
dfb4f309 7540 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
d5f8d3fe 7541 if (calldata == NULL) {
7135840f 7542 nfs_put_client(clp);
71ac6da9 7543 return ERR_PTR(-ENOMEM);
fc01cea9 7544 }
a9c92d6b 7545 nfs4_init_sequence(&calldata->args, &calldata->res, 0);
8fe72bac
TM		 7546 if (is_privileged)
7547 nfs4_set_sequence_privileged(&calldata->args);
d5f8d3fe
TM		 7548 msg.rpc_argp = &calldata->args;
7549 msg.rpc_resp = &calldata->res;
7550 calldata->clp = clp;
71ac6da9 7551 task_setup_data.callback_data = calldata;
fc01cea9 7552
71ac6da9
TM		 7553 return rpc_run_task(&task_setup_data);
7554}
7555
2f60ea6b 7556static int nfs41_proc_async_sequence(struct nfs_client *clp, struct rpc_cred *cred, unsigned renew_flags)
71ac6da9
TM		 7557{
7558 struct rpc_task *task;
7559 int ret = 0;
7560
2f60ea6b 7561 if ((renew_flags & NFS4_RENEW_TIMEOUT) == 0)
d1f456b0 7562 return -EAGAIN;
8fe72bac 7563 task = _nfs41_proc_sequence(clp, cred, false);
71ac6da9
TM		 7564 if (IS_ERR(task))
7565 ret = PTR_ERR(task);
7566 else
bf294b41 7567 rpc_put_task_async(task);
71ac6da9
TM		 7568 dprintk("<-- %s status=%d\n", __func__, ret);
7569 return ret;
7570}
7571
7572static int nfs4_proc_sequence(struct nfs_client *clp, struct rpc_cred *cred)
7573{
7574 struct rpc_task *task;
7575 int ret;
7576
8fe72bac 7577 task = _nfs41_proc_sequence(clp, cred, true);
71ac6da9
TM		 7578 if (IS_ERR(task)) {
7579 ret = PTR_ERR(task);
7580 goto out;
7581 }
7582 ret = rpc_wait_for_completion_task(task);
be824167 7583 if (!ret)
71ac6da9
TM		 7584 ret = task->tk_status;
7585 rpc_put_task(task);
7586out:
7587 dprintk("<-- %s status=%d\n", __func__, ret);
7588 return ret;
fc01cea9
AA		 7589}
7590
fce5c838
RL		 7591struct nfs4_reclaim_complete_data {
7592 struct nfs_client *clp;
7593 struct nfs41_reclaim_complete_args arg;
7594 struct nfs41_reclaim_complete_res res;
7595};
7596
7597static void nfs4_reclaim_complete_prepare(struct rpc_task *task, void *data)
7598{
7599 struct nfs4_reclaim_complete_data *calldata = data;
7600
d9afbd1b
TM		 7601 nfs41_setup_sequence(calldata->clp->cl_session,
7602 &calldata->arg.seq_args,
7603 &calldata->res.seq_res,
7604 task);
fce5c838
RL		 7605}
7606
aa5190d0
TM		 7607static int nfs41_reclaim_complete_handle_errors(struct rpc_task *task, struct nfs_client *clp)
7608{
7609 switch(task->tk_status) {
7610 case 0:
7611 case -NFS4ERR_COMPLETE_ALREADY:
7612 case -NFS4ERR_WRONG_CRED: /* What to do here? */
7613 break;
7614 case -NFS4ERR_DELAY:
aa5190d0 7615 rpc_delay(task, NFS4_POLL_RETRY_MAX);
a8a4ae3a
AA		 7616 /* fall through */
7617 case -NFS4ERR_RETRY_UNCACHED_REP:
aa5190d0
TM		 7618 return -EAGAIN;
7619 default:
0400a6b0 7620 nfs4_schedule_lease_recovery(clp);
aa5190d0
TM		 7621 }
7622 return 0;
7623}
7624
fce5c838
RL		 7625static void nfs4_reclaim_complete_done(struct rpc_task *task, void *data)
7626{
7627 struct nfs4_reclaim_complete_data *calldata = data;
7628 struct nfs_client *clp = calldata->clp;
7629 struct nfs4_sequence_res *res = &calldata->res.seq_res;
7630
7631 dprintk("--> %s\n", __func__);
14516c3a
TM		 7632 if (!nfs41_sequence_done(task, res))
7633 return;
fce5c838 7634
c6d01c6f 7635 trace_nfs4_reclaim_complete(clp, task->tk_status);
aa5190d0
TM		 7636 if (nfs41_reclaim_complete_handle_errors(task, clp) == -EAGAIN) {
7637 rpc_restart_call_prepare(task);
7638 return;
7639 }
fce5c838
RL		 7640 dprintk("<-- %s\n", __func__);
7641}
7642
7643static void nfs4_free_reclaim_complete_data(void *data)
7644{
7645 struct nfs4_reclaim_complete_data *calldata = data;
7646
7647 kfree(calldata);
7648}
7649
7650static const struct rpc_call_ops nfs4_reclaim_complete_call_ops = {
7651 .rpc_call_prepare = nfs4_reclaim_complete_prepare,
7652 .rpc_call_done = nfs4_reclaim_complete_done,
7653 .rpc_release = nfs4_free_reclaim_complete_data,
7654};
7655
7656/*
7657 * Issue a global reclaim complete.
7658 */
965e9c23
TM		 7659static int nfs41_proc_reclaim_complete(struct nfs_client *clp,
7660 struct rpc_cred *cred)
fce5c838
RL		 7661{
7662 struct nfs4_reclaim_complete_data *calldata;
7663 struct rpc_task *task;
7664 struct rpc_message msg = {
7665 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_RECLAIM_COMPLETE],
965e9c23 7666 .rpc_cred = cred,
fce5c838
RL		 7667 };
7668 struct rpc_task_setup task_setup_data = {
7669 .rpc_client = clp->cl_rpcclient,
7670 .rpc_message = &msg,
7671 .callback_ops = &nfs4_reclaim_complete_call_ops,
7672 .flags = RPC_TASK_ASYNC,
7673 };
7674 int status = -ENOMEM;
7675
7676 dprintk("--> %s\n", __func__);
8535b2be 7677 calldata = kzalloc(sizeof(*calldata), GFP_NOFS);
fce5c838
RL		 7678 if (calldata == NULL)
7679 goto out;
7680 calldata->clp = clp;
7681 calldata->arg.one_fs = 0;
fce5c838 7682
a9c92d6b 7683 nfs4_init_sequence(&calldata->arg.seq_args, &calldata->res.seq_res, 0);
8fe72bac 7684 nfs4_set_sequence_privileged(&calldata->arg.seq_args);
fce5c838
RL		 7685 msg.rpc_argp = &calldata->arg;
7686 msg.rpc_resp = &calldata->res;
7687 task_setup_data.callback_data = calldata;
7688 task = rpc_run_task(&task_setup_data);
acf82b85 7689 if (IS_ERR(task)) {
fce5c838 7690 status = PTR_ERR(task);
acf82b85
DC		 7691 goto out;
7692 }
c34c32ea
AA		 7693 status = nfs4_wait_for_completion_rpc_task(task);
7694 if (status == 0)
7695 status = task->tk_status;
fce5c838 7696 rpc_put_task(task);
acf82b85 7697 return 0;
fce5c838
RL		 7698out:
7699 dprintk("<-- %s status=%d\n", __func__, status);
7700 return status;
7701}
b1f69b75
AA		 7702
7703static void
7704nfs4_layoutget_prepare(struct rpc_task *task, void *calldata)
7705{
7706 struct nfs4_layoutget *lgp = calldata;
c31663d4 7707 struct nfs_server *server = NFS_SERVER(lgp->args.inode);
6ba7db34 7708 struct nfs4_session *session = nfs4_get_session(server);
b1f69b75
AA		 7709
7710 dprintk("--> %s\n", __func__);
c31663d4
FI		 7711 /* Note the is a race here, where a CB_LAYOUTRECALL can come in
7712 * right now covering the LAYOUTGET we are about to send.
7713 * However, that is not so catastrophic, and there seems
7714 * to be no way to prevent it completely.
7715 */
6ba7db34 7716 if (nfs41_setup_sequence(session, &lgp->args.seq_args,
9d12b216 7717 &lgp->res.seq_res, task))
b1f69b75 7718 return;
cf7d63f1
FI		 7719 if (pnfs_choose_layoutget_stateid(&lgp->args.stateid,
7720 NFS_I(lgp->args.inode)->layout,
ce6ab4f2 7721 &lgp->args.range,
cf7d63f1
FI		 7722 lgp->args.ctx->state)) {
7723 rpc_exit(task, NFS4_OK);
cf7d63f1 7724 }
b1f69b75
AA		 7725}
7726
7727static void nfs4_layoutget_done(struct rpc_task *task, void *calldata)
7728{
7729 struct nfs4_layoutget *lgp = calldata;
ee314c2a
TM		 7730 struct inode *inode = lgp->args.inode;
7731 struct nfs_server *server = NFS_SERVER(inode);
7732 struct pnfs_layout_hdr *lo;
7733 struct nfs4_state *state = NULL;
ed7e5423 7734 unsigned long timeo, now, giveup;
b1f69b75 7735
ed7e5423 7736 dprintk("--> %s tk_status => %d\n", __func__, -task->tk_status);
b1f69b75 7737
6ba7db34 7738 if (!nfs41_sequence_done(task, &lgp->res.seq_res))
ee314c2a 7739 goto out;
b1f69b75
AA		 7740
7741 switch (task->tk_status) {
7742 case 0:
ee314c2a 7743 goto out;
ed7e5423
BH		 7744 /*
7745 * NFS4ERR_LAYOUTTRYLATER is a conflict with another client
7746 * (or clients) writing to the same RAID stripe
7747 */
b1f69b75 7748 case -NFS4ERR_LAYOUTTRYLATER:
ed7e5423
BH		 7749 /*
7750 * NFS4ERR_RECALLCONFLICT is when conflict with self (must recall
7751 * existing layout before getting a new one).
7752 */
b1f69b75 7753 case -NFS4ERR_RECALLCONFLICT:
30005121
WAA		 7754 timeo = rpc_get_timeout(task->tk_client);
7755 giveup = lgp->args.timestamp + timeo;
ed7e5423
BH		 7756 now = jiffies;
7757 if (time_after(giveup, now)) {
7758 unsigned long delay;
7759
7760 /* Delay for:
7761 * - Not less then NFS4_POLL_RETRY_MIN.
7762 * - One last time a jiffie before we give up
7763 * - exponential backoff (time_now minus start_attempt)
7764 */
7765 delay = max_t(unsigned long, NFS4_POLL_RETRY_MIN,
7766 min((giveup - now - 1),
7767 now - lgp->args.timestamp));
7768
7769 dprintk("%s: NFS4ERR_RECALLCONFLICT waiting %lu\n",
7770 __func__, delay);
7771 rpc_delay(task, delay);
7772 task->tk_status = 0;
7773 rpc_restart_call_prepare(task);
7774 goto out; /* Do not call nfs4_async_handle_error() */
7775 }
ee314c2a
TM		 7776 break;
7777 case -NFS4ERR_EXPIRED:
7778 case -NFS4ERR_BAD_STATEID:
7779 spin_lock(&inode->i_lock);
7780 lo = NFS_I(inode)->layout;
7781 if (!lo || list_empty(&lo->plh_segs)) {
7782 spin_unlock(&inode->i_lock);
7783 /* If the open stateid was bad, then recover it. */
7784 state = lgp->args.ctx->state;
7785 } else {
7786 LIST_HEAD(head);
7787
defb8460
CH		 7788 /*
7789 * Mark the bad layout state as invalid, then retry
7790 * with the current stateid.
7791 */
ee314c2a
TM		 7792 pnfs_mark_matching_lsegs_invalid(lo, &head, NULL);
7793 spin_unlock(&inode->i_lock);
ee314c2a 7794 pnfs_free_lseg_list(&head);
defb8460
CH		 7795
7796 task->tk_status = 0;
7797 rpc_restart_call_prepare(task);
b1f69b75
AA		 7798 }
7799 }
8478eaa1 7800 if (nfs4_async_handle_error(task, server, state, NULL) == -EAGAIN)
ee314c2a
TM		 7801 rpc_restart_call_prepare(task);
7802out:
b1f69b75
AA		 7803 dprintk("<-- %s\n", __func__);
7804}
7805
8554116e
IK		 7806static size_t max_response_pages(struct nfs_server *server)
7807{
7808 u32 max_resp_sz = server->nfs_client->cl_session->fc_attrs.max_resp_sz;
7809 return nfs_page_array_len(0, max_resp_sz);
7810}
7811
7812static void nfs4_free_pages(struct page **pages, size_t size)
7813{
7814 int i;
7815
7816 if (!pages)
7817 return;
7818
7819 for (i = 0; i < size; i++) {
7820 if (!pages[i])
7821 break;
7822 __free_page(pages[i]);
7823 }
7824 kfree(pages);
7825}
7826
7827static struct page **nfs4_alloc_pages(size_t size, gfp_t gfp_flags)
7828{
7829 struct page **pages;
7830 int i;
7831
7832 pages = kcalloc(size, sizeof(struct page *), gfp_flags);
7833 if (!pages) {
7834 dprintk("%s: can't alloc array of %zu pages\n", __func__, size);
7835 return NULL;
7836 }
7837
7838 for (i = 0; i < size; i++) {
7839 pages[i] = alloc_page(gfp_flags);
7840 if (!pages[i]) {
7841 dprintk("%s: failed to allocate page\n", __func__);
7842 nfs4_free_pages(pages, size);
7843 return NULL;
7844 }
7845 }
7846
7847 return pages;
7848}
7849
b1f69b75
AA		 7850static void nfs4_layoutget_release(void *calldata)
7851{
7852 struct nfs4_layoutget *lgp = calldata;
a47970ff
WAA		 7853 struct inode *inode = lgp->args.inode;
7854 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7855 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7856
7857 dprintk("--> %s\n", __func__);
8554116e 7858 nfs4_free_pages(lgp->args.layout.pages, max_pages);
a47970ff 7859 pnfs_put_layout_hdr(NFS_I(inode)->layout);
b1f69b75
AA		 7860 put_nfs_open_context(lgp->args.ctx);
7861 kfree(calldata);
7862 dprintk("<-- %s\n", __func__);
7863}
7864
7865static const struct rpc_call_ops nfs4_layoutget_call_ops = {
7866 .rpc_call_prepare = nfs4_layoutget_prepare,
7867 .rpc_call_done = nfs4_layoutget_done,
7868 .rpc_release = nfs4_layoutget_release,
7869};
7870
a0b0a6e3
TM		 7871struct pnfs_layout_segment *
7872nfs4_proc_layoutget(struct nfs4_layoutget *lgp, gfp_t gfp_flags)
b1f69b75 7873{
a47970ff
WAA		 7874 struct inode *inode = lgp->args.inode;
7875 struct nfs_server *server = NFS_SERVER(inode);
8554116e 7876 size_t max_pages = max_response_pages(server);
b1f69b75
AA		 7877 struct rpc_task *task;
7878 struct rpc_message msg = {
7879 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTGET],
7880 .rpc_argp = &lgp->args,
7881 .rpc_resp = &lgp->res,
6ab59344 7882 .rpc_cred = lgp->cred,
b1f69b75
AA		 7883 };
7884 struct rpc_task_setup task_setup_data = {
7885 .rpc_client = server->client,
7886 .rpc_message = &msg,
7887 .callback_ops = &nfs4_layoutget_call_ops,
7888 .callback_data = lgp,
7889 .flags = RPC_TASK_ASYNC,
7890 };
a0b0a6e3 7891 struct pnfs_layout_segment *lseg = NULL;
b1f69b75
AA		 7892 int status = 0;
7893
7894 dprintk("--> %s\n", __func__);
7895
4bd5a980
PT		 7896 /* nfs4_layoutget_release calls pnfs_put_layout_hdr */
7897 pnfs_get_layout_hdr(NFS_I(inode)->layout);
7898
8554116e
IK		 7899 lgp->args.layout.pages = nfs4_alloc_pages(max_pages, gfp_flags);
7900 if (!lgp->args.layout.pages) {
7901 nfs4_layoutget_release(lgp);
a0b0a6e3 7902 return ERR_PTR(-ENOMEM);
8554116e
IK		 7903 }
7904 lgp->args.layout.pglen = max_pages * PAGE_SIZE;
30005121 7905 lgp->args.timestamp = jiffies;
8554116e 7906
35124a09 7907 lgp->res.layoutp = &lgp->args.layout;
b1f69b75 7908 lgp->res.seq_res.sr_slot = NULL;
a9c92d6b 7909 nfs4_init_sequence(&lgp->args.seq_args, &lgp->res.seq_res, 0);
a47970ff 7910
b1f69b75
AA		 7911 task = rpc_run_task(&task_setup_data);
7912 if (IS_ERR(task))
a0b0a6e3 7913 return ERR_CAST(task);
b1f69b75 7914 status = nfs4_wait_for_completion_rpc_task(task);
c31663d4
FI		 7915 if (status == 0)
7916 status = task->tk_status;
1037e6ea
TM		 7917 trace_nfs4_layoutget(lgp->args.ctx,
7918 &lgp->args.range,
7919 &lgp->res.range,
7920 status);
085b7a45
WAA		 7921 /* if layoutp->len is 0, nfs4_layoutget_prepare called rpc_exit */
7922 if (status == 0 && lgp->res.layoutp->len)
a0b0a6e3 7923 lseg = pnfs_layout_process(lgp);
b1f69b75
AA		 7924 rpc_put_task(task);
7925 dprintk("<-- %s status=%d\n", __func__, status);
a0b0a6e3
TM		 7926 if (status)
7927 return ERR_PTR(status);
7928 return lseg;
b1f69b75
AA		 7929}
7930
cbe82603
BH		 7931static void
7932nfs4_layoutreturn_prepare(struct rpc_task *task, void *calldata)
7933{
7934 struct nfs4_layoutreturn *lrp = calldata;
7935
7936 dprintk("--> %s\n", __func__);
d9afbd1b
TM		 7937 nfs41_setup_sequence(lrp->clp->cl_session,
7938 &lrp->args.seq_args,
7939 &lrp->res.seq_res,
7940 task);
cbe82603
BH		 7941}
7942
7943static void nfs4_layoutreturn_done(struct rpc_task *task, void *calldata)
7944{
7945 struct nfs4_layoutreturn *lrp = calldata;
7946 struct nfs_server *server;
7947
7948 dprintk("--> %s\n", __func__);
7949
6ba7db34 7950 if (!nfs41_sequence_done(task, &lrp->res.seq_res))
cbe82603
BH		 7951 return;
7952
7953 server = NFS_SERVER(lrp->args.inode);
f22e5edd
TM		 7954 switch (task->tk_status) {
7955 default:
7956 task->tk_status = 0;
7957 case 0:
7958 break;
7959 case -NFS4ERR_DELAY:
8478eaa1 7960 if (nfs4_async_handle_error(task, server, NULL, NULL) != -EAGAIN)
f22e5edd 7961 break;
d00c5d43 7962 rpc_restart_call_prepare(task);
cbe82603
BH		 7963 return;
7964 }
cbe82603
BH		 7965 dprintk("<-- %s\n", __func__);
7966}
7967
7968static void nfs4_layoutreturn_release(void *calldata)
7969{
7970 struct nfs4_layoutreturn *lrp = calldata;
849b286f 7971 struct pnfs_layout_hdr *lo = lrp->args.layout;
c5d73716 7972 LIST_HEAD(freeme);
cbe82603
BH		 7973
7974 dprintk("--> %s\n", __func__);
849b286f
TM		 7975 spin_lock(&lo->plh_inode->i_lock);
7976 if (lrp->res.lrs_present)
7977 pnfs_set_layout_stateid(lo, &lrp->res.stateid, true);
c5d73716 7978 pnfs_mark_matching_lsegs_invalid(lo, &freeme, &lrp->args.range);
d67ae825 7979 pnfs_clear_layoutreturn_waitbit(lo);
849b286f
TM		 7980 lo->plh_block_lgets--;
7981 spin_unlock(&lo->plh_inode->i_lock);
c5d73716 7982 pnfs_free_lseg_list(&freeme);
70c3bd2b 7983 pnfs_put_layout_hdr(lrp->args.layout);
5a0ec8ac 7984 nfs_iput_and_deactive(lrp->inode);
cbe82603
BH		 7985 kfree(calldata);
7986 dprintk("<-- %s\n", __func__);
7987}
7988
7989static const struct rpc_call_ops nfs4_layoutreturn_call_ops = {
7990 .rpc_call_prepare = nfs4_layoutreturn_prepare,
7991 .rpc_call_done = nfs4_layoutreturn_done,
7992 .rpc_release = nfs4_layoutreturn_release,
7993};
7994
6c16605d 7995int nfs4_proc_layoutreturn(struct nfs4_layoutreturn *lrp, bool sync)
cbe82603
BH		 7996{
7997 struct rpc_task *task;
7998 struct rpc_message msg = {
7999 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTRETURN],
8000 .rpc_argp = &lrp->args,
8001 .rpc_resp = &lrp->res,
9556000d 8002 .rpc_cred = lrp->cred,
cbe82603
BH		 8003 };
8004 struct rpc_task_setup task_setup_data = {
1771c577 8005 .rpc_client = NFS_SERVER(lrp->args.inode)->client,
cbe82603
BH		 8006 .rpc_message = &msg,
8007 .callback_ops = &nfs4_layoutreturn_call_ops,
8008 .callback_data = lrp,
8009 };
6c16605d 8010 int status = 0;
cbe82603
BH		 8011
8012 dprintk("--> %s\n", __func__);
5a0ec8ac
TM		 8013 if (!sync) {
8014 lrp->inode = nfs_igrab_and_active(lrp->args.inode);
8015 if (!lrp->inode) {
8016 nfs4_layoutreturn_release(lrp);
8017 return -EAGAIN;
8018 }
8019 task_setup_data.flags |= RPC_TASK_ASYNC;
8020 }
a9c92d6b 8021 nfs4_init_sequence(&lrp->args.seq_args, &lrp->res.seq_res, 1);
cbe82603
BH		 8022 task = rpc_run_task(&task_setup_data);
8023 if (IS_ERR(task))
8024 return PTR_ERR(task);
5a0ec8ac
TM		 8025 if (sync)
8026 status = task->tk_status;
1037e6ea 8027 trace_nfs4_layoutreturn(lrp->args.inode, status);
cbe82603
BH		 8028 dprintk("<-- %s status=%d\n", __func__, status);
8029 rpc_put_task(task);
8030 return status;
8031}
8032
b1f69b75 8033static int
cd5875fe
TM		 8034_nfs4_proc_getdeviceinfo(struct nfs_server *server,
8035 struct pnfs_device *pdev,
8036 struct rpc_cred *cred)
b1f69b75
AA		 8037{
8038 struct nfs4_getdeviceinfo_args args = {
8039 .pdev = pdev,
4e590803
TM		 8040 .notify_types = NOTIFY_DEVICEID4_CHANGE |
8041 NOTIFY_DEVICEID4_DELETE,
b1f69b75
AA		 8042 };
8043 struct nfs4_getdeviceinfo_res res = {
8044 .pdev = pdev,
8045 };
8046 struct rpc_message msg = {
8047 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_GETDEVICEINFO],
8048 .rpc_argp = &args,
8049 .rpc_resp = &res,
cd5875fe 8050 .rpc_cred = cred,
b1f69b75
AA		 8051 };
8052 int status;
8053
8054 dprintk("--> %s\n", __func__);
7c513058 8055 status = nfs4_call_sync(server->client, server, &msg, &args.seq_args, &res.seq_res, 0);
4e590803
TM		 8056 if (res.notification & ~args.notify_types)
8057 dprintk("%s: unsupported notification\n", __func__);
df52699e
TM		 8058 if (res.notification != args.notify_types)
8059 pdev->nocache = 1;
4e590803 8060
b1f69b75
AA		 8061 dprintk("<-- %s status=%d\n", __func__, status);
8062
8063 return status;
8064}
8065
cd5875fe
TM		 8066int nfs4_proc_getdeviceinfo(struct nfs_server *server,
8067 struct pnfs_device *pdev,
8068 struct rpc_cred *cred)
b1f69b75
AA		 8069{
8070 struct nfs4_exception exception = { };
8071 int err;
8072
8073 do {
8074 err = nfs4_handle_exception(server,
cd5875fe 8075 _nfs4_proc_getdeviceinfo(server, pdev, cred),
b1f69b75
AA		 8076 &exception);
8077 } while (exception.retry);
8078 return err;
8079}
8080EXPORT_SYMBOL_GPL(nfs4_proc_getdeviceinfo);
8081
863a3c6c
AA		 8082static void nfs4_layoutcommit_prepare(struct rpc_task *task, void *calldata)
8083{
8084 struct nfs4_layoutcommit_data *data = calldata;
8085 struct nfs_server *server = NFS_SERVER(data->args.inode);
6ba7db34 8086 struct nfs4_session *session = nfs4_get_session(server);
863a3c6c 8087
d9afbd1b
TM		 8088 nfs41_setup_sequence(session,
8089 &data->args.seq_args,
8090 &data->res.seq_res,
8091 task);
863a3c6c
AA		 8092}
8093
8094static void
8095nfs4_layoutcommit_done(struct rpc_task *task, void *calldata)
8096{
8097 struct nfs4_layoutcommit_data *data = calldata;
8098 struct nfs_server *server = NFS_SERVER(data->args.inode);
8099
6ba7db34 8100 if (!nfs41_sequence_done(task, &data->res.seq_res))
863a3c6c
AA		 8101 return;
8102
8103 switch (task->tk_status) { /* Just ignore these failures */
e59d27e0
TM		 8104 case -NFS4ERR_DELEG_REVOKED: /* layout was recalled */
8105 case -NFS4ERR_BADIOMODE: /* no IOMODE_RW layout for range */
8106 case -NFS4ERR_BADLAYOUT: /* no layout */
8107 case -NFS4ERR_GRACE: /* loca_recalim always false */
863a3c6c 8108 task->tk_status = 0;
e59d27e0 8109 case 0:
e59d27e0
TM		 8110 break;
8111 default:
8478eaa1 8112 if (nfs4_async_handle_error(task, server, NULL, NULL) == -EAGAIN) {
e59d27e0
TM		 8113 rpc_restart_call_prepare(task);
8114 return;
8115 }
8116 }
863a3c6c
AA		 8117}
8118
8119static void nfs4_layoutcommit_release(void *calldata)
8120{
8121 struct nfs4_layoutcommit_data *data = calldata;
8122
db29c089 8123 pnfs_cleanup_layoutcommit(data);
d8c951c3
TM		 8124 nfs_post_op_update_inode_force_wcc(data->args.inode,
8125 data->res.fattr);
863a3c6c 8126 put_rpccred(data->cred);
472e2594 8127 nfs_iput_and_deactive(data->inode);
863a3c6c
AA		 8128 kfree(data);
8129}
8130
8131static const struct rpc_call_ops nfs4_layoutcommit_ops = {
8132 .rpc_call_prepare = nfs4_layoutcommit_prepare,
8133 .rpc_call_done = nfs4_layoutcommit_done,
8134 .rpc_release = nfs4_layoutcommit_release,
8135};
8136
8137int
ef311537 8138nfs4_proc_layoutcommit(struct nfs4_layoutcommit_data *data, bool sync)
863a3c6c
AA		 8139{
8140 struct rpc_message msg = {
8141 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_LAYOUTCOMMIT],
8142 .rpc_argp = &data->args,
8143 .rpc_resp = &data->res,
8144 .rpc_cred = data->cred,
8145 };
8146 struct rpc_task_setup task_setup_data = {
8147 .task = &data->task,
8148 .rpc_client = NFS_CLIENT(data->args.inode),
8149 .rpc_message = &msg,
8150 .callback_ops = &nfs4_layoutcommit_ops,
8151 .callback_data = data,
863a3c6c
AA		 8152 };
8153 struct rpc_task *task;
8154 int status = 0;
8155
b4839ebe
KM		 8156 dprintk("NFS: initiating layoutcommit call. sync %d "
8157 "lbw: %llu inode %lu\n", sync,
863a3c6c
AA		 8158 data->args.lastbytewritten,
8159 data->args.inode->i_ino);
8160
472e2594
TM		 8161 if (!sync) {
8162 data->inode = nfs_igrab_and_active(data->args.inode);
8163 if (data->inode == NULL) {
8164 nfs4_layoutcommit_release(data);
8165 return -EAGAIN;
8166 }
8167 task_setup_data.flags = RPC_TASK_ASYNC;
8168 }
a9c92d6b 8169 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 1);
863a3c6c
AA		 8170 task = rpc_run_task(&task_setup_data);
8171 if (IS_ERR(task))
8172 return PTR_ERR(task);
472e2594
TM		 8173 if (sync)
8174 status = task->tk_status;
1037e6ea 8175 trace_nfs4_layoutcommit(data->args.inode, status);
863a3c6c
AA		 8176 dprintk("%s: status %d\n", __func__, status);
8177 rpc_put_task(task);
8178 return status;
8179}
fca78d6d 8180
97431204
AA		 8181/**
8182 * Use the state managment nfs_client cl_rpcclient, which uses krb5i (if
8183 * possible) as per RFC3530bis and RFC5661 Security Considerations sections
8184 */
fca78d6d
BS		 8185static int
8186_nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
b1b3e136
WAA		 8187 struct nfs_fsinfo *info,
8188 struct nfs4_secinfo_flavors *flavors, bool use_integrity)
fca78d6d
BS		 8189{
8190 struct nfs41_secinfo_no_name_args args = {
8191 .style = SECINFO_STYLE_CURRENT_FH,
8192 };
8193 struct nfs4_secinfo_res res = {
8194 .flavors = flavors,
8195 };
8196 struct rpc_message msg = {
8197 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_SECINFO_NO_NAME],
8198 .rpc_argp = &args,
8199 .rpc_resp = &res,
8200 };
b1b3e136 8201 struct rpc_clnt *clnt = server->client;
7cb852df 8202 struct rpc_cred *cred = NULL;
b1b3e136
WAA		 8203 int status;
8204
8205 if (use_integrity) {
8206 clnt = server->nfs_client->cl_rpcclient;
7cb852df
WAA		 8207 cred = nfs4_get_clid_cred(server->nfs_client);
8208 msg.rpc_cred = cred;
b1b3e136
WAA		 8209 }
8210
8211 dprintk("--> %s\n", __func__);
8212 status = nfs4_call_sync(clnt, server, &msg, &args.seq_args,
8213 &res.seq_res, 0);
8214 dprintk("<-- %s status=%d\n", __func__, status);
8215
7cb852df
WAA		 8216 if (cred)
8217 put_rpccred(cred);
b1b3e136
WAA		 8218
8219 return status;
fca78d6d
BS		 8220}
8221
8222static int
8223nfs41_proc_secinfo_no_name(struct nfs_server *server, struct nfs_fh *fhandle,
8224 struct nfs_fsinfo *info, struct nfs4_secinfo_flavors *flavors)
8225{
8226 struct nfs4_exception exception = { };
8227 int err;
8228 do {
b1b3e136
WAA		 8229 /* first try using integrity protection */
8230 err = -NFS4ERR_WRONGSEC;
8231
8232 /* try to use integrity protection with machine cred */
8233 if (_nfs4_is_integrity_protected(server->nfs_client))
8234 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8235 flavors, true);
8236
8237 /*
8238 * if unable to use integrity protection, or SECINFO with
8239 * integrity protection returns NFS4ERR_WRONGSEC (which is
8240 * disallowed by spec, but exists in deployed servers) use
8241 * the current filesystem's rpc_client and the user cred.
8242 */
8243 if (err == -NFS4ERR_WRONGSEC)
8244 err = _nfs41_proc_secinfo_no_name(server, fhandle, info,
8245 flavors, false);
8246
fca78d6d
BS		 8247 switch (err) {
8248 case 0:
8249 case -NFS4ERR_WRONGSEC:
78b19bae 8250 case -ENOTSUPP:
05e9cfb4 8251 goto out;
fca78d6d
BS		 8252 default:
8253 err = nfs4_handle_exception(server, err, &exception);
8254 }
8255 } while (exception.retry);
05e9cfb4 8256out:
fca78d6d
BS		 8257 return err;
8258}
8259
8260static int
8261nfs41_find_root_sec(struct nfs_server *server, struct nfs_fh *fhandle,
8262 struct nfs_fsinfo *info)
8263{
8264 int err;
8265 struct page *page;
367156d9 8266 rpc_authflavor_t flavor = RPC_AUTH_MAXFLAVOR;
fca78d6d 8267 struct nfs4_secinfo_flavors *flavors;
58a8cf12
WAA		 8268 struct nfs4_secinfo4 *secinfo;
8269 int i;
fca78d6d
BS		 8270
8271 page = alloc_page(GFP_KERNEL);
8272 if (!page) {
8273 err = -ENOMEM;
8274 goto out;
8275 }
8276
8277 flavors = page_address(page);
8278 err = nfs41_proc_secinfo_no_name(server, fhandle, info, flavors);
8279
8280 /*
8281 * Fall back on "guess and check" method if
8282 * the server doesn't support SECINFO_NO_NAME
8283 */
78b19bae 8284 if (err == -NFS4ERR_WRONGSEC || err == -ENOTSUPP) {
fca78d6d
BS		 8285 err = nfs4_find_root_sec(server, fhandle, info);
8286 goto out_freepage;
8287 }
8288 if (err)
8289 goto out_freepage;
8290
58a8cf12
WAA		 8291 for (i = 0; i < flavors->num_flavors; i++) {
8292 secinfo = &flavors->flavors[i];
8293
8294 switch (secinfo->flavor) {
8295 case RPC_AUTH_NULL:
8296 case RPC_AUTH_UNIX:
8297 case RPC_AUTH_GSS:
8298 flavor = rpcauth_get_pseudoflavor(secinfo->flavor,
8299 &secinfo->flavor_info);
8300 break;
8301 default:
8302 flavor = RPC_AUTH_MAXFLAVOR;
8303 break;
8304 }
8305
4d4b69dd
WAA		 8306 if (!nfs_auth_info_match(&server->auth_info, flavor))
8307 flavor = RPC_AUTH_MAXFLAVOR;
8308
58a8cf12
WAA		 8309 if (flavor != RPC_AUTH_MAXFLAVOR) {
8310 err = nfs4_lookup_root_sec(server, fhandle,
8311 info, flavor);
8312 if (!err)
8313 break;
8314 }
8315 }
8316
8317 if (flavor == RPC_AUTH_MAXFLAVOR)
8318 err = -EPERM;
fca78d6d
BS		 8319
8320out_freepage:
8321 put_page(page);
8322 if (err == -EACCES)
8323 return -EPERM;
8324out:
8325 return err;
8326}
1cab0652 8327
ab7cb0df
TM		 8328static int _nfs41_test_stateid(struct nfs_server *server,
8329 nfs4_stateid *stateid,
8330 struct rpc_cred *cred)
7d974794
BS		 8331{
8332 int status;
8333 struct nfs41_test_stateid_args args = {
1cab0652 8334 .stateid = stateid,
7d974794
BS		 8335 };
8336 struct nfs41_test_stateid_res res;
8337 struct rpc_message msg = {
8338 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_TEST_STATEID],
8339 .rpc_argp = &args,
8340 .rpc_resp = &res,
ab7cb0df 8341 .rpc_cred = cred,
7d974794 8342 };
3787d506
WAA		 8343 struct rpc_clnt *rpc_client = server->client;
8344
8345 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8346 &rpc_client, &msg);
1cab0652 8347
38527b15 8348 dprintk("NFS call test_stateid %p\n", stateid);
a9c92d6b 8349 nfs4_init_sequence(&args.seq_args, &res.seq_res, 0);
8fe72bac 8350 nfs4_set_sequence_privileged(&args.seq_args);
3787d506 8351 status = nfs4_call_sync_sequence(rpc_client, server, &msg,
8fe72bac 8352 &args.seq_args, &res.seq_res);
38527b15
CL		 8353 if (status != NFS_OK) {
8354 dprintk("NFS reply test_stateid: failed, %d\n", status);
377e507d 8355 return status;
38527b15
CL		 8356 }
8357 dprintk("NFS reply test_stateid: succeeded, %d\n", -res.status);
377e507d 8358 return -res.status;
7d974794
BS		 8359}
8360
38527b15
CL		 8361/**
8362 * nfs41_test_stateid - perform a TEST_STATEID operation
8363 *
8364 * @server: server / transport on which to perform the operation
8365 * @stateid: state ID to test
ab7cb0df 8366 * @cred: credential
38527b15
CL		 8367 *
8368 * Returns NFS_OK if the server recognizes that "stateid" is valid.
8369 * Otherwise a negative NFS4ERR value is returned if the operation
8370 * failed or the state ID is not currently valid.
8371 */
ab7cb0df
TM		 8372static int nfs41_test_stateid(struct nfs_server *server,
8373 nfs4_stateid *stateid,
8374 struct rpc_cred *cred)
7d974794
BS		 8375{
8376 struct nfs4_exception exception = { };
8377 int err;
8378 do {
ab7cb0df 8379 err = _nfs41_test_stateid(server, stateid, cred);
377e507d
CL		 8380 if (err != -NFS4ERR_DELAY)
8381 break;
8382 nfs4_handle_exception(server, err, &exception);
7d974794
BS		 8383 } while (exception.retry);
8384 return err;
8385}
9aeda35f 8386
7c1d5fae
TM		 8387struct nfs_free_stateid_data {
8388 struct nfs_server *server;
8389 struct nfs41_free_stateid_args args;
9aeda35f 8390 struct nfs41_free_stateid_res res;
7c1d5fae
TM		 8391};
8392
8393static void nfs41_free_stateid_prepare(struct rpc_task *task, void *calldata)
8394{
8395 struct nfs_free_stateid_data *data = calldata;
8396 nfs41_setup_sequence(nfs4_get_session(data->server),
8397 &data->args.seq_args,
8398 &data->res.seq_res,
8399 task);
8400}
8401
8402static void nfs41_free_stateid_done(struct rpc_task *task, void *calldata)
8403{
8404 struct nfs_free_stateid_data *data = calldata;
8405
8406 nfs41_sequence_done(task, &data->res.seq_res);
8407
8408 switch (task->tk_status) {
8409 case -NFS4ERR_DELAY:
8478eaa1 8410 if (nfs4_async_handle_error(task, data->server, NULL, NULL) == -EAGAIN)
7c1d5fae
TM		 8411 rpc_restart_call_prepare(task);
8412 }
8413}
8414
8415static void nfs41_free_stateid_release(void *calldata)
8416{
8417 kfree(calldata);
8418}
8419
17f26b12 8420static const struct rpc_call_ops nfs41_free_stateid_ops = {
7c1d5fae
TM		 8421 .rpc_call_prepare = nfs41_free_stateid_prepare,
8422 .rpc_call_done = nfs41_free_stateid_done,
8423 .rpc_release = nfs41_free_stateid_release,
8424};
8425
8426static struct rpc_task *_nfs41_free_stateid(struct nfs_server *server,
8427 nfs4_stateid *stateid,
ab7cb0df 8428 struct rpc_cred *cred,
7c1d5fae
TM		 8429 bool privileged)
8430{
9aeda35f
BS		 8431 struct rpc_message msg = {
8432 .rpc_proc = &nfs4_procedures[NFSPROC4_CLNT_FREE_STATEID],
ab7cb0df 8433 .rpc_cred = cred,
9aeda35f 8434 };
7c1d5fae
TM		 8435 struct rpc_task_setup task_setup = {
8436 .rpc_client = server->client,
8437 .rpc_message = &msg,
8438 .callback_ops = &nfs41_free_stateid_ops,
8439 .flags = RPC_TASK_ASYNC,
8440 };
8441 struct nfs_free_stateid_data *data;
9aeda35f 8442
3787d506
WAA		 8443 nfs4_state_protect(server->nfs_client, NFS_SP4_MACH_CRED_STATEID,
8444 &task_setup.rpc_client, &msg);
8445
38527b15 8446 dprintk("NFS call free_stateid %p\n", stateid);
7c1d5fae
TM		 8447 data = kmalloc(sizeof(*data), GFP_NOFS);
8448 if (!data)
8449 return ERR_PTR(-ENOMEM);
8450 data->server = server;
8451 nfs4_stateid_copy(&data->args.stateid, stateid);
8452
8453 task_setup.callback_data = data;
8454
8455 msg.rpc_argp = &data->args;
8456 msg.rpc_resp = &data->res;
a9c92d6b 8457 nfs4_init_sequence(&data->args.seq_args, &data->res.seq_res, 0);
7c1d5fae
TM		 8458 if (privileged)
8459 nfs4_set_sequence_privileged(&data->args.seq_args);
8460
8461 return rpc_run_task(&task_setup);
9aeda35f
BS		 8462}
8463
38527b15
CL		 8464/**
8465 * nfs41_free_stateid - perform a FREE_STATEID operation
8466 *
8467 * @server: server / transport on which to perform the operation
8468 * @stateid: state ID to release
ab7cb0df 8469 * @cred: credential
38527b15
CL		 8470 *
8471 * Returns NFS_OK if the server freed "stateid". Otherwise a
8472 * negative NFS4ERR value is returned.
8473 */
ab7cb0df
TM		 8474static int nfs41_free_stateid(struct nfs_server *server,
8475 nfs4_stateid *stateid,
8476 struct rpc_cred *cred)
9aeda35f 8477{
7c1d5fae
TM		 8478 struct rpc_task *task;
8479 int ret;
8480
ab7cb0df 8481 task = _nfs41_free_stateid(server, stateid, cred, true);
7c1d5fae
TM		 8482 if (IS_ERR(task))
8483 return PTR_ERR(task);
8484 ret = rpc_wait_for_completion_task(task);
8485 if (!ret)
8486 ret = task->tk_status;
8487 rpc_put_task(task);
8488 return ret;
9aeda35f 8489}
36281caa 8490
f1cdae87
JL		 8491static void
8492nfs41_free_lock_state(struct nfs_server *server, struct nfs4_lock_state *lsp)
c8b2d0bf
TM		 8493{
8494 struct rpc_task *task;
ab7cb0df 8495 struct rpc_cred *cred = lsp->ls_state->owner->so_cred;
c8b2d0bf 8496
ab7cb0df 8497 task = _nfs41_free_stateid(server, &lsp->ls_stateid, cred, false);
c8b2d0bf
TM		 8498 nfs4_free_lock_state(server, lsp);
8499 if (IS_ERR(task))
f1cdae87 8500 return;
c8b2d0bf 8501 rpc_put_task(task);
c8b2d0bf
TM		 8502}
8503
36281caa
TM		 8504static bool nfs41_match_stateid(const nfs4_stateid *s1,
8505 const nfs4_stateid *s2)
8506{
2d2f24ad 8507 if (memcmp(s1->other, s2->other, sizeof(s1->other)) != 0)
36281caa
TM		 8508 return false;
8509
2d2f24ad 8510 if (s1->seqid == s2->seqid)
36281caa 8511 return true;
2d2f24ad 8512 if (s1->seqid == 0 || s2->seqid == 0)
36281caa
TM		 8513 return true;
8514
8515 return false;
8516}
8517
557134a3
AA		 8518#endif /* CONFIG_NFS_V4_1 */
8519
36281caa
TM		 8520static bool nfs4_match_stateid(const nfs4_stateid *s1,
8521 const nfs4_stateid *s2)
8522{
f597c537 8523 return nfs4_stateid_match(s1, s2);
36281caa
TM		 8524}
8525
8526
17280175 8527static const struct nfs4_state_recovery_ops nfs40_reboot_recovery_ops = {
7eff03ae 8528 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
b79a4a1b 8529 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
1da177e4
LT		 8530 .recover_open = nfs4_open_reclaim,
8531 .recover_lock = nfs4_lock_reclaim,
591d71cb 8532 .establish_clid = nfs4_init_clientid,
05f4c350 8533 .detect_trunking = nfs40_discover_server_trunking,
1da177e4
LT		 8534};
8535
591d71cb 8536#if defined(CONFIG_NFS_V4_1)
17280175 8537static const struct nfs4_state_recovery_ops nfs41_reboot_recovery_ops = {
591d71cb
AA		 8538 .owner_flag_bit = NFS_OWNER_RECLAIM_REBOOT,
8539 .state_flag_bit = NFS_STATE_RECLAIM_REBOOT,
8540 .recover_open = nfs4_open_reclaim,
8541 .recover_lock = nfs4_lock_reclaim,
4d643d1d 8542 .establish_clid = nfs41_init_clientid,
fce5c838 8543 .reclaim_complete = nfs41_proc_reclaim_complete,
05f4c350 8544 .detect_trunking = nfs41_discover_server_trunking,
591d71cb
AA		 8545};
8546#endif /* CONFIG_NFS_V4_1 */
8547
17280175 8548static const struct nfs4_state_recovery_ops nfs40_nograce_recovery_ops = {
591d71cb
AA		 8549 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
8550 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
4dfd4f7a 8551 .recover_open = nfs40_open_expired,
591d71cb
AA		 8552 .recover_lock = nfs4_lock_expired,
8553 .establish_clid = nfs4_init_clientid,
8554};
8555
8556#if defined(CONFIG_NFS_V4_1)
17280175 8557static const struct nfs4_state_recovery_ops nfs41_nograce_recovery_ops = {
7eff03ae 8558 .owner_flag_bit = NFS_OWNER_RECLAIM_NOGRACE,
b79a4a1b 8559 .state_flag_bit = NFS_STATE_RECLAIM_NOGRACE,
f062eb6c
BS		 8560 .recover_open = nfs41_open_expired,
8561 .recover_lock = nfs41_lock_expired,
4d643d1d 8562 .establish_clid = nfs41_init_clientid,
1da177e4 8563};
591d71cb 8564#endif /* CONFIG_NFS_V4_1 */
1da177e4 8565
17280175 8566static const struct nfs4_state_maintenance_ops nfs40_state_renewal_ops = {
29fba38b 8567 .sched_state_renewal = nfs4_proc_async_renew,
a7b72103 8568 .get_state_renewal_cred_locked = nfs4_get_renew_cred_locked,
8e69514f 8569 .renew_lease = nfs4_proc_renew,
29fba38b
BH		 8570};
8571
8572#if defined(CONFIG_NFS_V4_1)
17280175 8573static const struct nfs4_state_maintenance_ops nfs41_state_renewal_ops = {
29fba38b 8574 .sched_state_renewal = nfs41_proc_async_sequence,
a7b72103 8575 .get_state_renewal_cred_locked = nfs4_get_machine_cred_locked,
8e69514f 8576 .renew_lease = nfs4_proc_sequence,
29fba38b
BH		 8577};
8578#endif
8579
ec011fe8 8580static const struct nfs4_mig_recovery_ops nfs40_mig_recovery_ops = {
b03d735b 8581 .get_locations = _nfs40_proc_get_locations,
44c99933 8582 .fsid_present = _nfs40_proc_fsid_present,
ec011fe8
CL		 8583};
8584
8585#if defined(CONFIG_NFS_V4_1)
8586static const struct nfs4_mig_recovery_ops nfs41_mig_recovery_ops = {
b03d735b 8587 .get_locations = _nfs41_proc_get_locations,
44c99933 8588 .fsid_present = _nfs41_proc_fsid_present,
ec011fe8
CL		 8589};
8590#endif /* CONFIG_NFS_V4_1 */
8591
97dc1359
TM		 8592static const struct nfs4_minor_version_ops nfs_v4_0_minor_ops = {
8593 .minor_version = 0,
39c6daae
TM		 8594 .init_caps = NFS_CAP_READDIRPLUS
8595 | NFS_CAP_ATOMIC_OPEN
39c6daae 8596 | NFS_CAP_POSIX_LOCK,
abf79bb3
CL		 8597 .init_client = nfs40_init_client,
8598 .shutdown_client = nfs40_shutdown_client,
36281caa 8599 .match_stateid = nfs4_match_stateid,
fca78d6d 8600 .find_root_sec = nfs4_find_root_sec,
c8b2d0bf 8601 .free_lock_state = nfs4_release_lockowner,
63f5f796 8602 .alloc_seqid = nfs_alloc_seqid,
9915ea7e 8603 .call_sync_ops = &nfs40_call_sync_ops,
c48f4f35
TM		 8604 .reboot_recovery_ops = &nfs40_reboot_recovery_ops,
8605 .nograce_recovery_ops = &nfs40_nograce_recovery_ops,
8606 .state_renewal_ops = &nfs40_state_renewal_ops,
ec011fe8 8607 .mig_recovery_ops = &nfs40_mig_recovery_ops,
97dc1359
TM		 8608};
8609
8610#if defined(CONFIG_NFS_V4_1)
63f5f796
TM		 8611static struct nfs_seqid *
8612nfs_alloc_no_seqid(struct nfs_seqid_counter *arg1, gfp_t arg2)
8613{
8614 return NULL;
8615}
8616
97dc1359
TM		 8617static const struct nfs4_minor_version_ops nfs_v4_1_minor_ops = {
8618 .minor_version = 1,
39c6daae
TM		 8619 .init_caps = NFS_CAP_READDIRPLUS
8620 | NFS_CAP_ATOMIC_OPEN
3b66486c 8621 | NFS_CAP_POSIX_LOCK
49f9a0fa 8622 | NFS_CAP_STATEID_NFSV41
e983120e 8623 | NFS_CAP_ATOMIC_OPEN_V1,
abf79bb3
CL		 8624 .init_client = nfs41_init_client,
8625 .shutdown_client = nfs41_shutdown_client,
36281caa 8626 .match_stateid = nfs41_match_stateid,
fca78d6d 8627 .find_root_sec = nfs41_find_root_sec,
c8b2d0bf 8628 .free_lock_state = nfs41_free_lock_state,
63f5f796 8629 .alloc_seqid = nfs_alloc_no_seqid,
9915ea7e 8630 .call_sync_ops = &nfs41_call_sync_ops,
c48f4f35
TM		 8631 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8632 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8633 .state_renewal_ops = &nfs41_state_renewal_ops,
ec011fe8 8634 .mig_recovery_ops = &nfs41_mig_recovery_ops,
97dc1359
TM		 8635};
8636#endif
8637
42c2c424
SD		 8638#if defined(CONFIG_NFS_V4_2)
8639static const struct nfs4_minor_version_ops nfs_v4_2_minor_ops = {
8640 .minor_version = 2,
7017310a
BS		 8641 .init_caps = NFS_CAP_READDIRPLUS
8642 | NFS_CAP_ATOMIC_OPEN
7017310a
BS		 8643 | NFS_CAP_POSIX_LOCK
8644 | NFS_CAP_STATEID_NFSV41
e983120e 8645 | NFS_CAP_ATOMIC_OPEN_V1
f4ac1674 8646 | NFS_CAP_ALLOCATE
624bd5b7 8647 | NFS_CAP_DEALLOCATE
6c5a0d89
TM		 8648 | NFS_CAP_SEEK
8649 | NFS_CAP_LAYOUTSTATS,
abf79bb3
CL		 8650 .init_client = nfs41_init_client,
8651 .shutdown_client = nfs41_shutdown_client,
42c2c424
SD		 8652 .match_stateid = nfs41_match_stateid,
8653 .find_root_sec = nfs41_find_root_sec,
7017310a 8654 .free_lock_state = nfs41_free_lock_state,
9915ea7e 8655 .call_sync_ops = &nfs41_call_sync_ops,
63f5f796 8656 .alloc_seqid = nfs_alloc_no_seqid,
42c2c424
SD		 8657 .reboot_recovery_ops = &nfs41_reboot_recovery_ops,
8658 .nograce_recovery_ops = &nfs41_nograce_recovery_ops,
8659 .state_renewal_ops = &nfs41_state_renewal_ops,
18e3b739 8660 .mig_recovery_ops = &nfs41_mig_recovery_ops,
42c2c424
SD		 8661};
8662#endif
8663
97dc1359
TM		 8664const struct nfs4_minor_version_ops *nfs_v4_minor_ops[] = {
8665 [0] = &nfs_v4_0_minor_ops,
8666#if defined(CONFIG_NFS_V4_1)
8667 [1] = &nfs_v4_1_minor_ops,
8668#endif
42c2c424
SD		 8669#if defined(CONFIG_NFS_V4_2)
8670 [2] = &nfs_v4_2_minor_ops,
8671#endif
97dc1359
TM		 8672};
8673
17f26b12 8674static const struct inode_operations nfs4_dir_inode_operations = {
73a79706
BS		 8675 .create = nfs_create,
8676 .lookup = nfs_lookup,
8677 .atomic_open = nfs_atomic_open,
8678 .link = nfs_link,
8679 .unlink = nfs_unlink,
8680 .symlink = nfs_symlink,
8681 .mkdir = nfs_mkdir,
8682 .rmdir = nfs_rmdir,
8683 .mknod = nfs_mknod,
8684 .rename = nfs_rename,
8685 .permission = nfs_permission,
8686 .getattr = nfs_getattr,
8687 .setattr = nfs_setattr,
8688 .getxattr = generic_getxattr,
8689 .setxattr = generic_setxattr,
8690 .listxattr = generic_listxattr,
8691 .removexattr = generic_removexattr,
8692};
8693
92e1d5be 8694static const struct inode_operations nfs4_file_inode_operations = {
6b3b5496
BF		 8695 .permission = nfs_permission,
8696 .getattr = nfs_getattr,
8697 .setattr = nfs_setattr,
64c2ce8b
AK		 8698 .getxattr = generic_getxattr,
8699 .setxattr = generic_setxattr,
8700 .listxattr = generic_listxattr,
8701 .removexattr = generic_removexattr,
6b3b5496
BF		 8702};
8703
509de811 8704const struct nfs_rpc_ops nfs_v4_clientops = {
1da177e4
LT		 8705 .version = 4, /* protocol version */
8706 .dentry_ops = &nfs4_dentry_operations,
8707 .dir_inode_ops = &nfs4_dir_inode_operations,
6b3b5496 8708 .file_inode_ops = &nfs4_file_inode_operations,
1788ea6e 8709 .file_ops = &nfs4_file_operations,
1da177e4 8710 .getroot = nfs4_proc_get_root,
281cad46 8711 .submount = nfs4_submount,
ff9099f2 8712 .try_mount = nfs4_try_mount,
1da177e4
LT		 8713 .getattr = nfs4_proc_getattr,
8714 .setattr = nfs4_proc_setattr,
8715 .lookup = nfs4_proc_lookup,
8716 .access = nfs4_proc_access,
8717 .readlink = nfs4_proc_readlink,
1da177e4
LT		 8718 .create = nfs4_proc_create,
8719 .remove = nfs4_proc_remove,
8720 .unlink_setup = nfs4_proc_unlink_setup,
34e137cc 8721 .unlink_rpc_prepare = nfs4_proc_unlink_rpc_prepare,
1da177e4 8722 .unlink_done = nfs4_proc_unlink_done,
d3d4152a 8723 .rename_setup = nfs4_proc_rename_setup,
c6bfa1a1 8724 .rename_rpc_prepare = nfs4_proc_rename_rpc_prepare,
d3d4152a 8725 .rename_done = nfs4_proc_rename_done,
1da177e4
LT		 8726 .link = nfs4_proc_link,
8727 .symlink = nfs4_proc_symlink,
8728 .mkdir = nfs4_proc_mkdir,
8729 .rmdir = nfs4_proc_remove,
8730 .readdir = nfs4_proc_readdir,
8731 .mknod = nfs4_proc_mknod,
8732 .statfs = nfs4_proc_statfs,
8733 .fsinfo = nfs4_proc_fsinfo,
8734 .pathconf = nfs4_proc_pathconf,
e9326dca 8735 .set_capabilities = nfs4_server_capabilities,
1da177e4 8736 .decode_dirent = nfs4_decode_dirent,
a4cdda59 8737 .pgio_rpc_prepare = nfs4_proc_pgio_rpc_prepare,
1da177e4 8738 .read_setup = nfs4_proc_read_setup,
ec06c096 8739 .read_done = nfs4_read_done,
1da177e4 8740 .write_setup = nfs4_proc_write_setup,
788e7a89 8741 .write_done = nfs4_write_done,
1da177e4 8742 .commit_setup = nfs4_proc_commit_setup,
0b7c0153 8743 .commit_rpc_prepare = nfs4_proc_commit_rpc_prepare,
788e7a89 8744 .commit_done = nfs4_commit_done,
1da177e4 8745 .lock = nfs4_proc_lock,
e50a1c2e 8746 .clear_acl_cache = nfs4_zap_acl_attr,
7fe5c398 8747 .close_context = nfs4_close_context,
2b484297 8748 .open_context = nfs4_atomic_open,
011e2a7f 8749 .have_delegation = nfs4_have_delegation,
57ec14c5 8750 .return_delegation = nfs4_inode_return_delegation,
6663ee7f 8751 .alloc_client = nfs4_alloc_client,
45a52a02 8752 .init_client = nfs4_init_client,
cdb7eced 8753 .free_client = nfs4_free_client,
1179acc6
BS		 8754 .create_server = nfs4_create_server,
8755 .clone_server = nfs_clone_server,
1da177e4
LT		 8756};
8757
64c2ce8b
AK		 8758static const struct xattr_handler nfs4_xattr_nfs4_acl_handler = {
8759 .prefix = XATTR_NAME_NFSV4_ACL,
8760 .list = nfs4_xattr_list_nfs4_acl,
8761 .get = nfs4_xattr_get_nfs4_acl,
8762 .set = nfs4_xattr_set_nfs4_acl,
8763};
8764
8765const struct xattr_handler *nfs4_xattr_handlers[] = {
8766 &nfs4_xattr_nfs4_acl_handler,
c9bccef6
DQ		 8767#ifdef CONFIG_NFS_V4_SECURITY_LABEL
8768 &nfs4_xattr_nfs4_label_handler,
8769#endif
64c2ce8b
AK		 8770 NULL
8771};
8772
1da177e4
LT		 8773/*
8774 * Local variables:
8775 * c-basic-offset: 8
8776 * End:
8777 */
Linux 6.x block layer and io_uring tree(s)