4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
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.
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.
39 #include <linux/utsname.h>
40 #include <linux/delay.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/sunrpc/clnt.h>
44 #include <linux/nfs.h>
45 #include <linux/nfs4.h>
46 #include <linux/nfs_fs.h>
47 #include <linux/nfs_page.h>
48 #include <linux/smp_lock.h>
49 #include <linux/namei.h>
50 #include <linux/mount.h>
53 #include "delegation.h"
56 #define NFSDBG_FACILITY NFSDBG_PROC
58 #define NFS4_POLL_RETRY_MIN (HZ/10)
59 #define NFS4_POLL_RETRY_MAX (15*HZ)
62 static int _nfs4_proc_open(struct nfs4_opendata
*data
);
63 static int nfs4_do_fsinfo(struct nfs_server
*, struct nfs_fh
*, struct nfs_fsinfo
*);
64 static int nfs4_async_handle_error(struct rpc_task
*, const struct nfs_server
*);
65 static int _nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
);
66 static int nfs4_handle_exception(const struct nfs_server
*server
, int errorcode
, struct nfs4_exception
*exception
);
67 static int nfs4_wait_clnt_recover(struct rpc_clnt
*clnt
, struct nfs_client
*clp
);
68 static int _nfs4_do_access(struct inode
*inode
, struct rpc_cred
*cred
, int openflags
);
70 /* Prevent leaks of NFSv4 errors into userland */
71 int nfs4_map_errors(int err
)
74 dprintk("%s could not handle NFSv4 error %d\n",
82 * This is our standard bitmap for GETATTR requests.
84 const u32 nfs4_fattr_bitmap
[2] = {
89 | FATTR4_WORD0_FILEID
,
91 | FATTR4_WORD1_NUMLINKS
93 | FATTR4_WORD1_OWNER_GROUP
95 | FATTR4_WORD1_SPACE_USED
96 | FATTR4_WORD1_TIME_ACCESS
97 | FATTR4_WORD1_TIME_METADATA
98 | FATTR4_WORD1_TIME_MODIFY
101 const u32 nfs4_statfs_bitmap
[2] = {
102 FATTR4_WORD0_FILES_AVAIL
103 | FATTR4_WORD0_FILES_FREE
104 | FATTR4_WORD0_FILES_TOTAL
,
105 FATTR4_WORD1_SPACE_AVAIL
106 | FATTR4_WORD1_SPACE_FREE
107 | FATTR4_WORD1_SPACE_TOTAL
110 const u32 nfs4_pathconf_bitmap
[2] = {
112 | FATTR4_WORD0_MAXNAME
,
116 const u32 nfs4_fsinfo_bitmap
[2] = { FATTR4_WORD0_MAXFILESIZE
117 | FATTR4_WORD0_MAXREAD
118 | FATTR4_WORD0_MAXWRITE
119 | FATTR4_WORD0_LEASE_TIME
,
123 const u32 nfs4_fs_locations_bitmap
[2] = {
125 | FATTR4_WORD0_CHANGE
128 | FATTR4_WORD0_FILEID
129 | FATTR4_WORD0_FS_LOCATIONS
,
131 | FATTR4_WORD1_NUMLINKS
133 | FATTR4_WORD1_OWNER_GROUP
134 | FATTR4_WORD1_RAWDEV
135 | FATTR4_WORD1_SPACE_USED
136 | FATTR4_WORD1_TIME_ACCESS
137 | FATTR4_WORD1_TIME_METADATA
138 | FATTR4_WORD1_TIME_MODIFY
139 | FATTR4_WORD1_MOUNTED_ON_FILEID
142 static void nfs4_setup_readdir(u64 cookie
, __be32
*verifier
, struct dentry
*dentry
,
143 struct nfs4_readdir_arg
*readdir
)
147 BUG_ON(readdir
->count
< 80);
149 readdir
->cookie
= cookie
;
150 memcpy(&readdir
->verifier
, verifier
, sizeof(readdir
->verifier
));
155 memset(&readdir
->verifier
, 0, sizeof(readdir
->verifier
));
160 * NFSv4 servers do not return entries for '.' and '..'
161 * Therefore, we fake these entries here. We let '.'
162 * have cookie 0 and '..' have cookie 1. Note that
163 * when talking to the server, we always send cookie 0
166 start
= p
= kmap_atomic(*readdir
->pages
, KM_USER0
);
169 *p
++ = xdr_one
; /* next */
170 *p
++ = xdr_zero
; /* cookie, first word */
171 *p
++ = xdr_one
; /* cookie, second word */
172 *p
++ = xdr_one
; /* entry len */
173 memcpy(p
, ".\0\0\0", 4); /* entry */
175 *p
++ = xdr_one
; /* bitmap length */
176 *p
++ = htonl(FATTR4_WORD0_FILEID
); /* bitmap */
177 *p
++ = htonl(8); /* attribute buffer length */
178 p
= xdr_encode_hyper(p
, dentry
->d_inode
->i_ino
);
181 *p
++ = xdr_one
; /* next */
182 *p
++ = xdr_zero
; /* cookie, first word */
183 *p
++ = xdr_two
; /* cookie, second word */
184 *p
++ = xdr_two
; /* entry len */
185 memcpy(p
, "..\0\0", 4); /* entry */
187 *p
++ = xdr_one
; /* bitmap length */
188 *p
++ = htonl(FATTR4_WORD0_FILEID
); /* bitmap */
189 *p
++ = htonl(8); /* attribute buffer length */
190 p
= xdr_encode_hyper(p
, dentry
->d_parent
->d_inode
->i_ino
);
192 readdir
->pgbase
= (char *)p
- (char *)start
;
193 readdir
->count
-= readdir
->pgbase
;
194 kunmap_atomic(start
, KM_USER0
);
197 static void renew_lease(const struct nfs_server
*server
, unsigned long timestamp
)
199 struct nfs_client
*clp
= server
->nfs_client
;
200 spin_lock(&clp
->cl_lock
);
201 if (time_before(clp
->cl_last_renewal
,timestamp
))
202 clp
->cl_last_renewal
= timestamp
;
203 spin_unlock(&clp
->cl_lock
);
206 static void update_changeattr(struct inode
*dir
, struct nfs4_change_info
*cinfo
)
208 struct nfs_inode
*nfsi
= NFS_I(dir
);
210 spin_lock(&dir
->i_lock
);
211 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
|NFS_INO_INVALID_DATA
;
212 if (cinfo
->before
== nfsi
->change_attr
&& cinfo
->atomic
)
213 nfsi
->change_attr
= cinfo
->after
;
214 spin_unlock(&dir
->i_lock
);
217 struct nfs4_opendata
{
219 struct nfs_openargs o_arg
;
220 struct nfs_openres o_res
;
221 struct nfs_open_confirmargs c_arg
;
222 struct nfs_open_confirmres c_res
;
223 struct nfs_fattr f_attr
;
224 struct nfs_fattr dir_attr
;
227 struct nfs4_state_owner
*owner
;
228 struct nfs4_state
*state
;
230 unsigned long timestamp
;
231 unsigned int rpc_done
: 1;
237 static void nfs4_init_opendata_res(struct nfs4_opendata
*p
)
239 p
->o_res
.f_attr
= &p
->f_attr
;
240 p
->o_res
.dir_attr
= &p
->dir_attr
;
241 p
->o_res
.server
= p
->o_arg
.server
;
242 nfs_fattr_init(&p
->f_attr
);
243 nfs_fattr_init(&p
->dir_attr
);
246 static struct nfs4_opendata
*nfs4_opendata_alloc(struct path
*path
,
247 struct nfs4_state_owner
*sp
, int flags
,
248 const struct iattr
*attrs
)
250 struct dentry
*parent
= dget_parent(path
->dentry
);
251 struct inode
*dir
= parent
->d_inode
;
252 struct nfs_server
*server
= NFS_SERVER(dir
);
253 struct nfs4_opendata
*p
;
255 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
258 p
->o_arg
.seqid
= nfs_alloc_seqid(&sp
->so_seqid
);
259 if (p
->o_arg
.seqid
== NULL
)
261 p
->path
.mnt
= mntget(path
->mnt
);
262 p
->path
.dentry
= dget(path
->dentry
);
265 atomic_inc(&sp
->so_count
);
266 p
->o_arg
.fh
= NFS_FH(dir
);
267 p
->o_arg
.open_flags
= flags
,
268 p
->o_arg
.clientid
= server
->nfs_client
->cl_clientid
;
269 p
->o_arg
.id
= sp
->so_owner_id
.id
;
270 p
->o_arg
.name
= &p
->path
.dentry
->d_name
;
271 p
->o_arg
.server
= server
;
272 p
->o_arg
.bitmask
= server
->attr_bitmask
;
273 p
->o_arg
.claim
= NFS4_OPEN_CLAIM_NULL
;
274 if (flags
& O_EXCL
) {
275 u32
*s
= (u32
*) p
->o_arg
.u
.verifier
.data
;
278 } else if (flags
& O_CREAT
) {
279 p
->o_arg
.u
.attrs
= &p
->attrs
;
280 memcpy(&p
->attrs
, attrs
, sizeof(p
->attrs
));
282 p
->c_arg
.fh
= &p
->o_res
.fh
;
283 p
->c_arg
.stateid
= &p
->o_res
.stateid
;
284 p
->c_arg
.seqid
= p
->o_arg
.seqid
;
285 nfs4_init_opendata_res(p
);
295 static void nfs4_opendata_free(struct kref
*kref
)
297 struct nfs4_opendata
*p
= container_of(kref
,
298 struct nfs4_opendata
, kref
);
300 nfs_free_seqid(p
->o_arg
.seqid
);
301 if (p
->state
!= NULL
)
302 nfs4_put_open_state(p
->state
);
303 nfs4_put_state_owner(p
->owner
);
305 dput(p
->path
.dentry
);
310 static void nfs4_opendata_put(struct nfs4_opendata
*p
)
313 kref_put(&p
->kref
, nfs4_opendata_free
);
316 static int nfs4_wait_for_completion_rpc_task(struct rpc_task
*task
)
321 rpc_clnt_sigmask(task
->tk_client
, &oldset
);
322 ret
= rpc_wait_for_completion_task(task
);
323 rpc_clnt_sigunmask(task
->tk_client
, &oldset
);
327 static int can_open_cached(struct nfs4_state
*state
, int mode
)
330 switch (mode
& (FMODE_READ
|FMODE_WRITE
|O_EXCL
)) {
332 ret
|= test_bit(NFS_O_RDONLY_STATE
, &state
->flags
) != 0;
333 ret
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
) != 0;
336 ret
|= test_bit(NFS_O_WRONLY_STATE
, &state
->flags
) != 0;
337 ret
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
) != 0;
339 case FMODE_READ
|FMODE_WRITE
:
340 ret
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
) != 0;
345 static int can_open_delegated(struct nfs_delegation
*delegation
, mode_t open_flags
)
347 if ((delegation
->type
& open_flags
) != open_flags
)
349 if (delegation
->flags
& NFS_DELEGATION_NEED_RECLAIM
)
354 static void update_open_stateflags(struct nfs4_state
*state
, mode_t open_flags
)
356 switch (open_flags
) {
363 case FMODE_READ
|FMODE_WRITE
:
366 nfs4_state_set_mode_locked(state
, state
->state
| open_flags
);
369 static void nfs_set_open_stateid_locked(struct nfs4_state
*state
, nfs4_stateid
*stateid
, int open_flags
)
371 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0)
372 memcpy(state
->stateid
.data
, stateid
->data
, sizeof(state
->stateid
.data
));
373 memcpy(state
->open_stateid
.data
, stateid
->data
, sizeof(state
->open_stateid
.data
));
374 switch (open_flags
) {
376 set_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
379 set_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
381 case FMODE_READ
|FMODE_WRITE
:
382 set_bit(NFS_O_RDWR_STATE
, &state
->flags
);
386 static void nfs_set_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*stateid
, int open_flags
)
388 spin_lock(&state
->owner
->so_lock
);
389 spin_lock(&state
->inode
->i_lock
);
390 nfs_set_open_stateid_locked(state
, stateid
, open_flags
);
391 spin_unlock(&state
->inode
->i_lock
);
392 spin_unlock(&state
->owner
->so_lock
);
395 static void update_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*open_stateid
, nfs4_stateid
*deleg_stateid
, int open_flags
)
397 struct inode
*inode
= state
->inode
;
399 open_flags
&= (FMODE_READ
|FMODE_WRITE
);
400 /* Protect against nfs4_find_state_byowner() */
401 spin_lock(&state
->owner
->so_lock
);
402 spin_lock(&inode
->i_lock
);
403 if (deleg_stateid
!= NULL
) {
404 memcpy(state
->stateid
.data
, deleg_stateid
->data
, sizeof(state
->stateid
.data
));
405 set_bit(NFS_DELEGATED_STATE
, &state
->flags
);
407 if (open_stateid
!= NULL
)
408 nfs_set_open_stateid_locked(state
, open_stateid
, open_flags
);
409 update_open_stateflags(state
, open_flags
);
410 spin_unlock(&inode
->i_lock
);
411 spin_unlock(&state
->owner
->so_lock
);
414 static void nfs4_return_incompatible_delegation(struct inode
*inode
, mode_t open_flags
)
416 struct nfs_delegation
*delegation
;
419 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
420 if (delegation
== NULL
|| (delegation
->type
& open_flags
) == open_flags
) {
425 nfs_inode_return_delegation(inode
);
428 static struct nfs4_state
*nfs4_try_open_cached(struct nfs4_opendata
*opendata
)
430 struct nfs4_state
*state
= opendata
->state
;
431 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
432 struct nfs_delegation
*delegation
;
433 int open_mode
= opendata
->o_arg
.open_flags
& (FMODE_READ
|FMODE_WRITE
|O_EXCL
);
434 nfs4_stateid stateid
;
438 delegation
= rcu_dereference(nfsi
->delegation
);
440 if (can_open_cached(state
, open_mode
)) {
441 spin_lock(&state
->owner
->so_lock
);
442 if (can_open_cached(state
, open_mode
)) {
443 update_open_stateflags(state
, open_mode
);
444 spin_unlock(&state
->owner
->so_lock
);
446 goto out_return_state
;
448 spin_unlock(&state
->owner
->so_lock
);
450 if (delegation
== NULL
)
452 if (!can_open_delegated(delegation
, open_mode
))
454 /* Save the delegation */
455 memcpy(stateid
.data
, delegation
->stateid
.data
, sizeof(stateid
.data
));
458 ret
= _nfs4_do_access(state
->inode
, state
->owner
->so_cred
, open_mode
);
464 delegation
= rcu_dereference(nfsi
->delegation
);
465 /* If no delegation, try a cached open */
466 if (delegation
== NULL
)
468 /* Is the delegation still valid? */
469 if (memcmp(stateid
.data
, delegation
->stateid
.data
, sizeof(stateid
.data
)) != 0)
472 update_open_stateid(state
, NULL
, &stateid
, open_mode
);
473 goto out_return_state
;
479 atomic_inc(&state
->count
);
483 static struct nfs4_state
*nfs4_opendata_to_nfs4_state(struct nfs4_opendata
*data
)
486 struct nfs4_state
*state
= NULL
;
487 struct nfs_delegation
*delegation
;
488 nfs4_stateid
*deleg_stateid
= NULL
;
491 if (!data
->rpc_done
) {
492 state
= nfs4_try_open_cached(data
);
497 if (!(data
->f_attr
.valid
& NFS_ATTR_FATTR
))
499 inode
= nfs_fhget(data
->dir
->d_sb
, &data
->o_res
.fh
, &data
->f_attr
);
500 ret
= PTR_ERR(inode
);
504 state
= nfs4_get_open_state(inode
, data
->owner
);
507 if (data
->o_res
.delegation_type
!= 0) {
508 int delegation_flags
= 0;
511 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
513 delegation_flags
= delegation
->flags
;
515 if (!(delegation_flags
& NFS_DELEGATION_NEED_RECLAIM
))
516 nfs_inode_set_delegation(state
->inode
,
517 data
->owner
->so_cred
,
520 nfs_inode_reclaim_delegation(state
->inode
,
521 data
->owner
->so_cred
,
525 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
526 if (delegation
!= NULL
)
527 deleg_stateid
= &delegation
->stateid
;
528 update_open_stateid(state
, &data
->o_res
.stateid
, deleg_stateid
, data
->o_arg
.open_flags
);
539 static struct nfs_open_context
*nfs4_state_find_open_context(struct nfs4_state
*state
)
541 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
542 struct nfs_open_context
*ctx
;
544 spin_lock(&state
->inode
->i_lock
);
545 list_for_each_entry(ctx
, &nfsi
->open_files
, list
) {
546 if (ctx
->state
!= state
)
548 get_nfs_open_context(ctx
);
549 spin_unlock(&state
->inode
->i_lock
);
552 spin_unlock(&state
->inode
->i_lock
);
553 return ERR_PTR(-ENOENT
);
556 static int nfs4_open_recover_helper(struct nfs4_opendata
*opendata
, mode_t openflags
, struct nfs4_state
**res
)
558 struct nfs4_state
*newstate
;
561 opendata
->o_arg
.open_flags
= openflags
;
562 memset(&opendata
->o_res
, 0, sizeof(opendata
->o_res
));
563 memset(&opendata
->c_res
, 0, sizeof(opendata
->c_res
));
564 nfs4_init_opendata_res(opendata
);
565 ret
= _nfs4_proc_open(opendata
);
568 newstate
= nfs4_opendata_to_nfs4_state(opendata
);
569 if (IS_ERR(newstate
))
570 return PTR_ERR(newstate
);
571 nfs4_close_state(&opendata
->path
, newstate
, openflags
);
576 static int nfs4_open_recover(struct nfs4_opendata
*opendata
, struct nfs4_state
*state
)
578 struct nfs4_state
*newstate
;
581 /* memory barrier prior to reading state->n_* */
582 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
584 if (state
->n_rdwr
!= 0) {
585 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
|FMODE_WRITE
, &newstate
);
588 if (newstate
!= state
)
591 if (state
->n_wronly
!= 0) {
592 ret
= nfs4_open_recover_helper(opendata
, FMODE_WRITE
, &newstate
);
595 if (newstate
!= state
)
598 if (state
->n_rdonly
!= 0) {
599 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
, &newstate
);
602 if (newstate
!= state
)
610 * reclaim state on the server after a reboot.
612 static int _nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
614 struct nfs_delegation
*delegation
= NFS_I(state
->inode
)->delegation
;
615 struct nfs4_opendata
*opendata
;
616 int delegation_type
= 0;
619 if (delegation
!= NULL
) {
620 if (!(delegation
->flags
& NFS_DELEGATION_NEED_RECLAIM
)) {
621 memcpy(&state
->stateid
, &delegation
->stateid
,
622 sizeof(state
->stateid
));
623 set_bit(NFS_DELEGATED_STATE
, &state
->flags
);
626 delegation_type
= delegation
->type
;
628 opendata
= nfs4_opendata_alloc(&ctx
->path
, state
->owner
, 0, NULL
);
629 if (opendata
== NULL
)
631 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_PREVIOUS
;
632 opendata
->o_arg
.fh
= NFS_FH(state
->inode
);
633 nfs_copy_fh(&opendata
->o_res
.fh
, opendata
->o_arg
.fh
);
634 opendata
->o_arg
.u
.delegation_type
= delegation_type
;
635 status
= nfs4_open_recover(opendata
, state
);
636 nfs4_opendata_put(opendata
);
640 static int nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
642 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
643 struct nfs4_exception exception
= { };
646 err
= _nfs4_do_open_reclaim(ctx
, state
);
647 if (err
!= -NFS4ERR_DELAY
)
649 nfs4_handle_exception(server
, err
, &exception
);
650 } while (exception
.retry
);
654 static int nfs4_open_reclaim(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
656 struct nfs_open_context
*ctx
;
659 ctx
= nfs4_state_find_open_context(state
);
662 ret
= nfs4_do_open_reclaim(ctx
, state
);
663 put_nfs_open_context(ctx
);
667 static int _nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
669 struct nfs4_state_owner
*sp
= state
->owner
;
670 struct nfs4_opendata
*opendata
;
673 opendata
= nfs4_opendata_alloc(&ctx
->path
, sp
, 0, NULL
);
674 if (opendata
== NULL
)
676 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_DELEGATE_CUR
;
677 memcpy(opendata
->o_arg
.u
.delegation
.data
, stateid
->data
,
678 sizeof(opendata
->o_arg
.u
.delegation
.data
));
679 ret
= nfs4_open_recover(opendata
, state
);
680 nfs4_opendata_put(opendata
);
684 int nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
686 struct nfs4_exception exception
= { };
687 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
690 err
= _nfs4_open_delegation_recall(ctx
, state
, stateid
);
694 case -NFS4ERR_STALE_CLIENTID
:
695 case -NFS4ERR_STALE_STATEID
:
696 case -NFS4ERR_EXPIRED
:
697 /* Don't recall a delegation if it was lost */
698 nfs4_schedule_state_recovery(server
->nfs_client
);
701 err
= nfs4_handle_exception(server
, err
, &exception
);
702 } while (exception
.retry
);
706 static void nfs4_open_confirm_prepare(struct rpc_task
*task
, void *calldata
)
708 struct nfs4_opendata
*data
= calldata
;
709 struct rpc_message msg
= {
710 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_CONFIRM
],
711 .rpc_argp
= &data
->c_arg
,
712 .rpc_resp
= &data
->c_res
,
713 .rpc_cred
= data
->owner
->so_cred
,
715 data
->timestamp
= jiffies
;
716 rpc_call_setup(task
, &msg
, 0);
719 static void nfs4_open_confirm_done(struct rpc_task
*task
, void *calldata
)
721 struct nfs4_opendata
*data
= calldata
;
723 data
->rpc_status
= task
->tk_status
;
724 if (RPC_ASSASSINATED(task
))
726 if (data
->rpc_status
== 0) {
727 memcpy(data
->o_res
.stateid
.data
, data
->c_res
.stateid
.data
,
728 sizeof(data
->o_res
.stateid
.data
));
729 renew_lease(data
->o_res
.server
, data
->timestamp
);
732 nfs_confirm_seqid(&data
->owner
->so_seqid
, data
->rpc_status
);
733 nfs_increment_open_seqid(data
->rpc_status
, data
->c_arg
.seqid
);
736 static void nfs4_open_confirm_release(void *calldata
)
738 struct nfs4_opendata
*data
= calldata
;
739 struct nfs4_state
*state
= NULL
;
741 /* If this request hasn't been cancelled, do nothing */
742 if (data
->cancelled
== 0)
744 /* In case of error, no cleanup! */
747 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
748 state
= nfs4_opendata_to_nfs4_state(data
);
750 nfs4_close_state(&data
->path
, state
, data
->o_arg
.open_flags
);
752 nfs4_opendata_put(data
);
755 static const struct rpc_call_ops nfs4_open_confirm_ops
= {
756 .rpc_call_prepare
= nfs4_open_confirm_prepare
,
757 .rpc_call_done
= nfs4_open_confirm_done
,
758 .rpc_release
= nfs4_open_confirm_release
,
762 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
764 static int _nfs4_proc_open_confirm(struct nfs4_opendata
*data
)
766 struct nfs_server
*server
= NFS_SERVER(data
->dir
->d_inode
);
767 struct rpc_task
*task
;
770 kref_get(&data
->kref
);
772 data
->rpc_status
= 0;
773 task
= rpc_run_task(server
->client
, RPC_TASK_ASYNC
, &nfs4_open_confirm_ops
, data
);
775 return PTR_ERR(task
);
776 status
= nfs4_wait_for_completion_rpc_task(task
);
781 status
= data
->rpc_status
;
786 static void nfs4_open_prepare(struct rpc_task
*task
, void *calldata
)
788 struct nfs4_opendata
*data
= calldata
;
789 struct nfs4_state_owner
*sp
= data
->owner
;
790 struct rpc_message msg
= {
791 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN
],
792 .rpc_argp
= &data
->o_arg
,
793 .rpc_resp
= &data
->o_res
,
794 .rpc_cred
= sp
->so_cred
,
797 if (nfs_wait_on_sequence(data
->o_arg
.seqid
, task
) != 0)
800 * Check if we still need to send an OPEN call, or if we can use
801 * a delegation instead.
803 if (data
->state
!= NULL
) {
804 struct nfs_delegation
*delegation
;
806 if (can_open_cached(data
->state
, data
->o_arg
.open_flags
& (FMODE_READ
|FMODE_WRITE
|O_EXCL
)))
809 delegation
= rcu_dereference(NFS_I(data
->state
->inode
)->delegation
);
810 if (delegation
!= NULL
&&
811 (delegation
->flags
& NFS_DELEGATION_NEED_RECLAIM
) == 0) {
817 /* Update sequence id. */
818 data
->o_arg
.id
= sp
->so_owner_id
.id
;
819 data
->o_arg
.clientid
= sp
->so_client
->cl_clientid
;
820 if (data
->o_arg
.claim
== NFS4_OPEN_CLAIM_PREVIOUS
)
821 msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_NOATTR
];
822 data
->timestamp
= jiffies
;
823 rpc_call_setup(task
, &msg
, 0);
826 task
->tk_action
= NULL
;
830 static void nfs4_open_done(struct rpc_task
*task
, void *calldata
)
832 struct nfs4_opendata
*data
= calldata
;
834 data
->rpc_status
= task
->tk_status
;
835 if (RPC_ASSASSINATED(task
))
837 if (task
->tk_status
== 0) {
838 switch (data
->o_res
.f_attr
->mode
& S_IFMT
) {
842 data
->rpc_status
= -ELOOP
;
845 data
->rpc_status
= -EISDIR
;
848 data
->rpc_status
= -ENOTDIR
;
850 renew_lease(data
->o_res
.server
, data
->timestamp
);
851 if (!(data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
))
852 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
854 nfs_increment_open_seqid(data
->rpc_status
, data
->o_arg
.seqid
);
858 static void nfs4_open_release(void *calldata
)
860 struct nfs4_opendata
*data
= calldata
;
861 struct nfs4_state
*state
= NULL
;
863 /* If this request hasn't been cancelled, do nothing */
864 if (data
->cancelled
== 0)
866 /* In case of error, no cleanup! */
867 if (data
->rpc_status
!= 0 || !data
->rpc_done
)
869 /* In case we need an open_confirm, no cleanup! */
870 if (data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
)
872 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
873 state
= nfs4_opendata_to_nfs4_state(data
);
875 nfs4_close_state(&data
->path
, state
, data
->o_arg
.open_flags
);
877 nfs4_opendata_put(data
);
880 static const struct rpc_call_ops nfs4_open_ops
= {
881 .rpc_call_prepare
= nfs4_open_prepare
,
882 .rpc_call_done
= nfs4_open_done
,
883 .rpc_release
= nfs4_open_release
,
887 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
889 static int _nfs4_proc_open(struct nfs4_opendata
*data
)
891 struct inode
*dir
= data
->dir
->d_inode
;
892 struct nfs_server
*server
= NFS_SERVER(dir
);
893 struct nfs_openargs
*o_arg
= &data
->o_arg
;
894 struct nfs_openres
*o_res
= &data
->o_res
;
895 struct rpc_task
*task
;
898 kref_get(&data
->kref
);
900 data
->rpc_status
= 0;
902 task
= rpc_run_task(server
->client
, RPC_TASK_ASYNC
, &nfs4_open_ops
, data
);
904 return PTR_ERR(task
);
905 status
= nfs4_wait_for_completion_rpc_task(task
);
910 status
= data
->rpc_status
;
912 if (status
!= 0 || !data
->rpc_done
)
915 if (o_arg
->open_flags
& O_CREAT
) {
916 update_changeattr(dir
, &o_res
->cinfo
);
917 nfs_post_op_update_inode(dir
, o_res
->dir_attr
);
919 nfs_refresh_inode(dir
, o_res
->dir_attr
);
920 if(o_res
->rflags
& NFS4_OPEN_RESULT_CONFIRM
) {
921 status
= _nfs4_proc_open_confirm(data
);
925 if (!(o_res
->f_attr
->valid
& NFS_ATTR_FATTR
))
926 return server
->nfs_client
->rpc_ops
->getattr(server
, &o_res
->fh
, o_res
->f_attr
);
930 static int _nfs4_do_access(struct inode
*inode
, struct rpc_cred
*cred
, int openflags
)
932 struct nfs_access_entry cache
;
936 if (openflags
& FMODE_READ
)
938 if (openflags
& FMODE_WRITE
)
940 if (openflags
& FMODE_EXEC
)
942 status
= nfs_access_get_cached(inode
, cred
, &cache
);
946 /* Be clever: ask server to check for all possible rights */
947 cache
.mask
= MAY_EXEC
| MAY_WRITE
| MAY_READ
;
949 cache
.jiffies
= jiffies
;
950 status
= _nfs4_proc_access(inode
, &cache
);
953 nfs_access_add_cache(inode
, &cache
);
955 if ((cache
.mask
& mask
) == mask
)
960 static int nfs4_recover_expired_lease(struct nfs_server
*server
)
962 struct nfs_client
*clp
= server
->nfs_client
;
966 ret
= nfs4_wait_clnt_recover(server
->client
, clp
);
969 if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
))
971 nfs4_schedule_state_recovery(clp
);
978 * reclaim state on the server after a network partition.
979 * Assumes caller holds the appropriate lock
981 static int _nfs4_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
983 struct inode
*inode
= state
->inode
;
984 struct nfs_delegation
*delegation
= NFS_I(inode
)->delegation
;
985 struct nfs4_opendata
*opendata
;
986 int openflags
= state
->state
& (FMODE_READ
|FMODE_WRITE
);
989 if (delegation
!= NULL
&& !(delegation
->flags
& NFS_DELEGATION_NEED_RECLAIM
)) {
990 ret
= _nfs4_do_access(inode
, ctx
->cred
, openflags
);
993 memcpy(&state
->stateid
, &delegation
->stateid
, sizeof(state
->stateid
));
994 set_bit(NFS_DELEGATED_STATE
, &state
->flags
);
997 opendata
= nfs4_opendata_alloc(&ctx
->path
, state
->owner
, openflags
, NULL
);
998 if (opendata
== NULL
)
1000 ret
= nfs4_open_recover(opendata
, state
);
1001 if (ret
== -ESTALE
) {
1002 /* Invalidate the state owner so we don't ever use it again */
1003 nfs4_drop_state_owner(state
->owner
);
1004 d_drop(ctx
->path
.dentry
);
1006 nfs4_opendata_put(opendata
);
1010 static inline int nfs4_do_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1012 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1013 struct nfs4_exception exception
= { };
1017 err
= _nfs4_open_expired(ctx
, state
);
1018 if (err
== -NFS4ERR_DELAY
)
1019 nfs4_handle_exception(server
, err
, &exception
);
1020 } while (exception
.retry
);
1024 static int nfs4_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
1026 struct nfs_open_context
*ctx
;
1029 ctx
= nfs4_state_find_open_context(state
);
1031 return PTR_ERR(ctx
);
1032 ret
= nfs4_do_open_expired(ctx
, state
);
1033 put_nfs_open_context(ctx
);
1038 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1039 * fields corresponding to attributes that were used to store the verifier.
1040 * Make sure we clobber those fields in the later setattr call
1042 static inline void nfs4_exclusive_attrset(struct nfs4_opendata
*opendata
, struct iattr
*sattr
)
1044 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_ACCESS
) &&
1045 !(sattr
->ia_valid
& ATTR_ATIME_SET
))
1046 sattr
->ia_valid
|= ATTR_ATIME
;
1048 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_MODIFY
) &&
1049 !(sattr
->ia_valid
& ATTR_MTIME_SET
))
1050 sattr
->ia_valid
|= ATTR_MTIME
;
1054 * Returns a referenced nfs4_state
1056 static int _nfs4_do_open(struct inode
*dir
, struct path
*path
, int flags
, struct iattr
*sattr
, struct rpc_cred
*cred
, struct nfs4_state
**res
)
1058 struct nfs4_state_owner
*sp
;
1059 struct nfs4_state
*state
= NULL
;
1060 struct nfs_server
*server
= NFS_SERVER(dir
);
1061 struct nfs_client
*clp
= server
->nfs_client
;
1062 struct nfs4_opendata
*opendata
;
1065 /* Protect against reboot recovery conflicts */
1067 if (!(sp
= nfs4_get_state_owner(server
, cred
))) {
1068 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1071 status
= nfs4_recover_expired_lease(server
);
1073 goto err_put_state_owner
;
1074 if (path
->dentry
->d_inode
!= NULL
)
1075 nfs4_return_incompatible_delegation(path
->dentry
->d_inode
, flags
& (FMODE_READ
|FMODE_WRITE
));
1076 down_read(&clp
->cl_sem
);
1078 opendata
= nfs4_opendata_alloc(path
, sp
, flags
, sattr
);
1079 if (opendata
== NULL
)
1080 goto err_release_rwsem
;
1082 if (path
->dentry
->d_inode
!= NULL
)
1083 opendata
->state
= nfs4_get_open_state(path
->dentry
->d_inode
, sp
);
1085 status
= _nfs4_proc_open(opendata
);
1087 goto err_opendata_put
;
1089 if (opendata
->o_arg
.open_flags
& O_EXCL
)
1090 nfs4_exclusive_attrset(opendata
, sattr
);
1092 state
= nfs4_opendata_to_nfs4_state(opendata
);
1093 status
= PTR_ERR(state
);
1095 goto err_opendata_put
;
1096 nfs4_opendata_put(opendata
);
1097 nfs4_put_state_owner(sp
);
1098 up_read(&clp
->cl_sem
);
1102 nfs4_opendata_put(opendata
);
1104 up_read(&clp
->cl_sem
);
1105 err_put_state_owner
:
1106 nfs4_put_state_owner(sp
);
1113 static struct nfs4_state
*nfs4_do_open(struct inode
*dir
, struct path
*path
, int flags
, struct iattr
*sattr
, struct rpc_cred
*cred
)
1115 struct nfs4_exception exception
= { };
1116 struct nfs4_state
*res
;
1120 status
= _nfs4_do_open(dir
, path
, flags
, sattr
, cred
, &res
);
1123 /* NOTE: BAD_SEQID means the server and client disagree about the
1124 * book-keeping w.r.t. state-changing operations
1125 * (OPEN/CLOSE/LOCK/LOCKU...)
1126 * It is actually a sign of a bug on the client or on the server.
1128 * If we receive a BAD_SEQID error in the particular case of
1129 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1130 * have unhashed the old state_owner for us, and that we can
1131 * therefore safely retry using a new one. We should still warn
1132 * the user though...
1134 if (status
== -NFS4ERR_BAD_SEQID
) {
1135 printk(KERN_WARNING
"NFS: v4 server %s "
1136 " returned a bad sequence-id error!\n",
1137 NFS_SERVER(dir
)->nfs_client
->cl_hostname
);
1138 exception
.retry
= 1;
1142 * BAD_STATEID on OPEN means that the server cancelled our
1143 * state before it received the OPEN_CONFIRM.
1144 * Recover by retrying the request as per the discussion
1145 * on Page 181 of RFC3530.
1147 if (status
== -NFS4ERR_BAD_STATEID
) {
1148 exception
.retry
= 1;
1151 if (status
== -EAGAIN
) {
1152 /* We must have found a delegation */
1153 exception
.retry
= 1;
1156 res
= ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir
),
1157 status
, &exception
));
1158 } while (exception
.retry
);
1162 static int _nfs4_do_setattr(struct inode
*inode
, struct nfs_fattr
*fattr
,
1163 struct iattr
*sattr
, struct nfs4_state
*state
)
1165 struct nfs_server
*server
= NFS_SERVER(inode
);
1166 struct nfs_setattrargs arg
= {
1167 .fh
= NFS_FH(inode
),
1170 .bitmask
= server
->attr_bitmask
,
1172 struct nfs_setattrres res
= {
1176 struct rpc_message msg
= {
1177 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETATTR
],
1181 unsigned long timestamp
= jiffies
;
1184 nfs_fattr_init(fattr
);
1186 if (nfs4_copy_delegation_stateid(&arg
.stateid
, inode
)) {
1187 /* Use that stateid */
1188 } else if (state
!= NULL
) {
1189 msg
.rpc_cred
= state
->owner
->so_cred
;
1190 nfs4_copy_stateid(&arg
.stateid
, state
, current
->files
);
1192 memcpy(&arg
.stateid
, &zero_stateid
, sizeof(arg
.stateid
));
1194 status
= rpc_call_sync(server
->client
, &msg
, 0);
1195 if (status
== 0 && state
!= NULL
)
1196 renew_lease(server
, timestamp
);
1200 static int nfs4_do_setattr(struct inode
*inode
, struct nfs_fattr
*fattr
,
1201 struct iattr
*sattr
, struct nfs4_state
*state
)
1203 struct nfs_server
*server
= NFS_SERVER(inode
);
1204 struct nfs4_exception exception
= { };
1207 err
= nfs4_handle_exception(server
,
1208 _nfs4_do_setattr(inode
, fattr
, sattr
, state
),
1210 } while (exception
.retry
);
1214 struct nfs4_closedata
{
1216 struct inode
*inode
;
1217 struct nfs4_state
*state
;
1218 struct nfs_closeargs arg
;
1219 struct nfs_closeres res
;
1220 struct nfs_fattr fattr
;
1221 unsigned long timestamp
;
1224 static void nfs4_free_closedata(void *data
)
1226 struct nfs4_closedata
*calldata
= data
;
1227 struct nfs4_state_owner
*sp
= calldata
->state
->owner
;
1229 nfs4_put_open_state(calldata
->state
);
1230 nfs_free_seqid(calldata
->arg
.seqid
);
1231 nfs4_put_state_owner(sp
);
1232 dput(calldata
->path
.dentry
);
1233 mntput(calldata
->path
.mnt
);
1237 static void nfs4_close_done(struct rpc_task
*task
, void *data
)
1239 struct nfs4_closedata
*calldata
= data
;
1240 struct nfs4_state
*state
= calldata
->state
;
1241 struct nfs_server
*server
= NFS_SERVER(calldata
->inode
);
1243 if (RPC_ASSASSINATED(task
))
1245 /* hmm. we are done with the inode, and in the process of freeing
1246 * the state_owner. we keep this around to process errors
1248 nfs_increment_open_seqid(task
->tk_status
, calldata
->arg
.seqid
);
1249 switch (task
->tk_status
) {
1251 nfs_set_open_stateid(state
, &calldata
->res
.stateid
, calldata
->arg
.open_flags
);
1252 renew_lease(server
, calldata
->timestamp
);
1254 case -NFS4ERR_STALE_STATEID
:
1255 case -NFS4ERR_EXPIRED
:
1258 if (nfs4_async_handle_error(task
, server
) == -EAGAIN
) {
1259 rpc_restart_call(task
);
1263 nfs_refresh_inode(calldata
->inode
, calldata
->res
.fattr
);
1266 static void nfs4_close_prepare(struct rpc_task
*task
, void *data
)
1268 struct nfs4_closedata
*calldata
= data
;
1269 struct nfs4_state
*state
= calldata
->state
;
1270 struct rpc_message msg
= {
1271 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CLOSE
],
1272 .rpc_argp
= &calldata
->arg
,
1273 .rpc_resp
= &calldata
->res
,
1274 .rpc_cred
= state
->owner
->so_cred
,
1276 int clear_rd
, clear_wr
, clear_rdwr
;
1279 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
1282 mode
= FMODE_READ
|FMODE_WRITE
;
1283 clear_rd
= clear_wr
= clear_rdwr
= 0;
1284 spin_lock(&state
->owner
->so_lock
);
1285 spin_lock(&calldata
->inode
->i_lock
);
1286 /* Calculate the change in open mode */
1287 if (state
->n_rdwr
== 0) {
1288 if (state
->n_rdonly
== 0) {
1289 mode
&= ~FMODE_READ
;
1290 clear_rd
|= test_and_clear_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
1291 clear_rdwr
|= test_and_clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1293 if (state
->n_wronly
== 0) {
1294 mode
&= ~FMODE_WRITE
;
1295 clear_wr
|= test_and_clear_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
1296 clear_rdwr
|= test_and_clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1299 spin_unlock(&calldata
->inode
->i_lock
);
1300 spin_unlock(&state
->owner
->so_lock
);
1301 if (!clear_rd
&& !clear_wr
&& !clear_rdwr
) {
1302 /* Note: exit _without_ calling nfs4_close_done */
1303 task
->tk_action
= NULL
;
1306 nfs_fattr_init(calldata
->res
.fattr
);
1308 msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_DOWNGRADE
];
1309 calldata
->arg
.open_flags
= mode
;
1310 calldata
->timestamp
= jiffies
;
1311 rpc_call_setup(task
, &msg
, 0);
1314 static const struct rpc_call_ops nfs4_close_ops
= {
1315 .rpc_call_prepare
= nfs4_close_prepare
,
1316 .rpc_call_done
= nfs4_close_done
,
1317 .rpc_release
= nfs4_free_closedata
,
1321 * It is possible for data to be read/written from a mem-mapped file
1322 * after the sys_close call (which hits the vfs layer as a flush).
1323 * This means that we can't safely call nfsv4 close on a file until
1324 * the inode is cleared. This in turn means that we are not good
1325 * NFSv4 citizens - we do not indicate to the server to update the file's
1326 * share state even when we are done with one of the three share
1327 * stateid's in the inode.
1329 * NOTE: Caller must be holding the sp->so_owner semaphore!
1331 int nfs4_do_close(struct path
*path
, struct nfs4_state
*state
)
1333 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1334 struct nfs4_closedata
*calldata
;
1335 struct nfs4_state_owner
*sp
= state
->owner
;
1336 struct rpc_task
*task
;
1337 int status
= -ENOMEM
;
1339 calldata
= kmalloc(sizeof(*calldata
), GFP_KERNEL
);
1340 if (calldata
== NULL
)
1342 calldata
->inode
= state
->inode
;
1343 calldata
->state
= state
;
1344 calldata
->arg
.fh
= NFS_FH(state
->inode
);
1345 calldata
->arg
.stateid
= &state
->open_stateid
;
1346 /* Serialization for the sequence id */
1347 calldata
->arg
.seqid
= nfs_alloc_seqid(&state
->owner
->so_seqid
);
1348 if (calldata
->arg
.seqid
== NULL
)
1349 goto out_free_calldata
;
1350 calldata
->arg
.bitmask
= server
->attr_bitmask
;
1351 calldata
->res
.fattr
= &calldata
->fattr
;
1352 calldata
->res
.server
= server
;
1353 calldata
->path
.mnt
= mntget(path
->mnt
);
1354 calldata
->path
.dentry
= dget(path
->dentry
);
1356 task
= rpc_run_task(server
->client
, RPC_TASK_ASYNC
, &nfs4_close_ops
, calldata
);
1358 return PTR_ERR(task
);
1364 nfs4_put_open_state(state
);
1365 nfs4_put_state_owner(sp
);
1369 static int nfs4_intent_set_file(struct nameidata
*nd
, struct path
*path
, struct nfs4_state
*state
)
1374 /* If the open_intent is for execute, we have an extra check to make */
1375 if (nd
->intent
.open
.flags
& FMODE_EXEC
) {
1376 ret
= _nfs4_do_access(state
->inode
,
1377 state
->owner
->so_cred
,
1378 nd
->intent
.open
.flags
);
1382 filp
= lookup_instantiate_filp(nd
, path
->dentry
, NULL
);
1383 if (!IS_ERR(filp
)) {
1384 struct nfs_open_context
*ctx
;
1385 ctx
= (struct nfs_open_context
*)filp
->private_data
;
1389 ret
= PTR_ERR(filp
);
1391 nfs4_close_state(path
, state
, nd
->intent
.open
.flags
);
1396 nfs4_atomic_open(struct inode
*dir
, struct dentry
*dentry
, struct nameidata
*nd
)
1398 struct path path
= {
1403 struct rpc_cred
*cred
;
1404 struct nfs4_state
*state
;
1407 if (nd
->flags
& LOOKUP_CREATE
) {
1408 attr
.ia_mode
= nd
->intent
.open
.create_mode
;
1409 attr
.ia_valid
= ATTR_MODE
;
1410 if (!IS_POSIXACL(dir
))
1411 attr
.ia_mode
&= ~current
->fs
->umask
;
1414 BUG_ON(nd
->intent
.open
.flags
& O_CREAT
);
1417 cred
= rpcauth_lookupcred(NFS_CLIENT(dir
)->cl_auth
, 0);
1419 return (struct dentry
*)cred
;
1420 state
= nfs4_do_open(dir
, &path
, nd
->intent
.open
.flags
, &attr
, cred
);
1422 if (IS_ERR(state
)) {
1423 if (PTR_ERR(state
) == -ENOENT
)
1424 d_add(dentry
, NULL
);
1425 return (struct dentry
*)state
;
1427 res
= d_add_unique(dentry
, igrab(state
->inode
));
1430 nfs4_intent_set_file(nd
, &path
, state
);
1435 nfs4_open_revalidate(struct inode
*dir
, struct dentry
*dentry
, int openflags
, struct nameidata
*nd
)
1437 struct path path
= {
1441 struct rpc_cred
*cred
;
1442 struct nfs4_state
*state
;
1444 cred
= rpcauth_lookupcred(NFS_CLIENT(dir
)->cl_auth
, 0);
1446 return PTR_ERR(cred
);
1447 state
= nfs4_do_open(dir
, &path
, openflags
, NULL
, cred
);
1449 if (IS_ERR(state
)) {
1450 switch (PTR_ERR(state
)) {
1456 lookup_instantiate_filp(nd
, (struct dentry
*)state
, NULL
);
1462 if (state
->inode
== dentry
->d_inode
) {
1463 nfs4_intent_set_file(nd
, &path
, state
);
1466 nfs4_close_state(&path
, state
, openflags
);
1473 static int _nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1475 struct nfs4_server_caps_res res
= {};
1476 struct rpc_message msg
= {
1477 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SERVER_CAPS
],
1478 .rpc_argp
= fhandle
,
1483 status
= rpc_call_sync(server
->client
, &msg
, 0);
1485 memcpy(server
->attr_bitmask
, res
.attr_bitmask
, sizeof(server
->attr_bitmask
));
1486 if (res
.attr_bitmask
[0] & FATTR4_WORD0_ACL
)
1487 server
->caps
|= NFS_CAP_ACLS
;
1488 if (res
.has_links
!= 0)
1489 server
->caps
|= NFS_CAP_HARDLINKS
;
1490 if (res
.has_symlinks
!= 0)
1491 server
->caps
|= NFS_CAP_SYMLINKS
;
1492 server
->acl_bitmask
= res
.acl_bitmask
;
1497 int nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1499 struct nfs4_exception exception
= { };
1502 err
= nfs4_handle_exception(server
,
1503 _nfs4_server_capabilities(server
, fhandle
),
1505 } while (exception
.retry
);
1509 static int _nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1510 struct nfs_fsinfo
*info
)
1512 struct nfs4_lookup_root_arg args
= {
1513 .bitmask
= nfs4_fattr_bitmap
,
1515 struct nfs4_lookup_res res
= {
1517 .fattr
= info
->fattr
,
1520 struct rpc_message msg
= {
1521 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP_ROOT
],
1525 nfs_fattr_init(info
->fattr
);
1526 return rpc_call_sync(server
->client
, &msg
, 0);
1529 static int nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1530 struct nfs_fsinfo
*info
)
1532 struct nfs4_exception exception
= { };
1535 err
= nfs4_handle_exception(server
,
1536 _nfs4_lookup_root(server
, fhandle
, info
),
1538 } while (exception
.retry
);
1543 * get the file handle for the "/" directory on the server
1545 static int nfs4_proc_get_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1546 struct nfs_fsinfo
*info
)
1550 status
= nfs4_lookup_root(server
, fhandle
, info
);
1552 status
= nfs4_server_capabilities(server
, fhandle
);
1554 status
= nfs4_do_fsinfo(server
, fhandle
, info
);
1555 return nfs4_map_errors(status
);
1559 * Get locations and (maybe) other attributes of a referral.
1560 * Note that we'll actually follow the referral later when
1561 * we detect fsid mismatch in inode revalidation
1563 static int nfs4_get_referral(struct inode
*dir
, struct qstr
*name
, struct nfs_fattr
*fattr
, struct nfs_fh
*fhandle
)
1565 int status
= -ENOMEM
;
1566 struct page
*page
= NULL
;
1567 struct nfs4_fs_locations
*locations
= NULL
;
1569 page
= alloc_page(GFP_KERNEL
);
1572 locations
= kmalloc(sizeof(struct nfs4_fs_locations
), GFP_KERNEL
);
1573 if (locations
== NULL
)
1576 status
= nfs4_proc_fs_locations(dir
, name
, locations
, page
);
1579 /* Make sure server returned a different fsid for the referral */
1580 if (nfs_fsid_equal(&NFS_SERVER(dir
)->fsid
, &locations
->fattr
.fsid
)) {
1581 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__
, name
->name
);
1586 memcpy(fattr
, &locations
->fattr
, sizeof(struct nfs_fattr
));
1587 fattr
->valid
|= NFS_ATTR_FATTR_V4_REFERRAL
;
1589 fattr
->mode
= S_IFDIR
;
1590 memset(fhandle
, 0, sizeof(struct nfs_fh
));
1599 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1601 struct nfs4_getattr_arg args
= {
1603 .bitmask
= server
->attr_bitmask
,
1605 struct nfs4_getattr_res res
= {
1609 struct rpc_message msg
= {
1610 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETATTR
],
1615 nfs_fattr_init(fattr
);
1616 return rpc_call_sync(server
->client
, &msg
, 0);
1619 static int nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1621 struct nfs4_exception exception
= { };
1624 err
= nfs4_handle_exception(server
,
1625 _nfs4_proc_getattr(server
, fhandle
, fattr
),
1627 } while (exception
.retry
);
1632 * The file is not closed if it is opened due to the a request to change
1633 * the size of the file. The open call will not be needed once the
1634 * VFS layer lookup-intents are implemented.
1636 * Close is called when the inode is destroyed.
1637 * If we haven't opened the file for O_WRONLY, we
1638 * need to in the size_change case to obtain a stateid.
1641 * Because OPEN is always done by name in nfsv4, it is
1642 * possible that we opened a different file by the same
1643 * name. We can recognize this race condition, but we
1644 * can't do anything about it besides returning an error.
1646 * This will be fixed with VFS changes (lookup-intent).
1649 nfs4_proc_setattr(struct dentry
*dentry
, struct nfs_fattr
*fattr
,
1650 struct iattr
*sattr
)
1652 struct rpc_cred
*cred
;
1653 struct inode
*inode
= dentry
->d_inode
;
1654 struct nfs_open_context
*ctx
;
1655 struct nfs4_state
*state
= NULL
;
1658 nfs_fattr_init(fattr
);
1660 cred
= rpcauth_lookupcred(NFS_CLIENT(inode
)->cl_auth
, 0);
1662 return PTR_ERR(cred
);
1664 /* Search for an existing open(O_WRITE) file */
1665 ctx
= nfs_find_open_context(inode
, cred
, FMODE_WRITE
);
1669 status
= nfs4_do_setattr(inode
, fattr
, sattr
, state
);
1671 nfs_setattr_update_inode(inode
, sattr
);
1673 put_nfs_open_context(ctx
);
1678 static int _nfs4_proc_lookupfh(struct nfs_server
*server
, struct nfs_fh
*dirfh
,
1679 struct qstr
*name
, struct nfs_fh
*fhandle
,
1680 struct nfs_fattr
*fattr
)
1683 struct nfs4_lookup_arg args
= {
1684 .bitmask
= server
->attr_bitmask
,
1688 struct nfs4_lookup_res res
= {
1693 struct rpc_message msg
= {
1694 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP
],
1699 nfs_fattr_init(fattr
);
1701 dprintk("NFS call lookupfh %s\n", name
->name
);
1702 status
= rpc_call_sync(server
->client
, &msg
, 0);
1703 dprintk("NFS reply lookupfh: %d\n", status
);
1707 static int nfs4_proc_lookupfh(struct nfs_server
*server
, struct nfs_fh
*dirfh
,
1708 struct qstr
*name
, struct nfs_fh
*fhandle
,
1709 struct nfs_fattr
*fattr
)
1711 struct nfs4_exception exception
= { };
1714 err
= _nfs4_proc_lookupfh(server
, dirfh
, name
, fhandle
, fattr
);
1716 if (err
== -NFS4ERR_MOVED
) {
1720 err
= nfs4_handle_exception(server
, err
, &exception
);
1721 } while (exception
.retry
);
1725 static int _nfs4_proc_lookup(struct inode
*dir
, struct qstr
*name
,
1726 struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1730 dprintk("NFS call lookup %s\n", name
->name
);
1731 status
= _nfs4_proc_lookupfh(NFS_SERVER(dir
), NFS_FH(dir
), name
, fhandle
, fattr
);
1732 if (status
== -NFS4ERR_MOVED
)
1733 status
= nfs4_get_referral(dir
, name
, fattr
, fhandle
);
1734 dprintk("NFS reply lookup: %d\n", status
);
1738 static int nfs4_proc_lookup(struct inode
*dir
, struct qstr
*name
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1740 struct nfs4_exception exception
= { };
1743 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1744 _nfs4_proc_lookup(dir
, name
, fhandle
, fattr
),
1746 } while (exception
.retry
);
1750 static int _nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
1752 struct nfs4_accessargs args
= {
1753 .fh
= NFS_FH(inode
),
1755 struct nfs4_accessres res
= { 0 };
1756 struct rpc_message msg
= {
1757 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_ACCESS
],
1760 .rpc_cred
= entry
->cred
,
1762 int mode
= entry
->mask
;
1766 * Determine which access bits we want to ask for...
1768 if (mode
& MAY_READ
)
1769 args
.access
|= NFS4_ACCESS_READ
;
1770 if (S_ISDIR(inode
->i_mode
)) {
1771 if (mode
& MAY_WRITE
)
1772 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
;
1773 if (mode
& MAY_EXEC
)
1774 args
.access
|= NFS4_ACCESS_LOOKUP
;
1776 if (mode
& MAY_WRITE
)
1777 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
;
1778 if (mode
& MAY_EXEC
)
1779 args
.access
|= NFS4_ACCESS_EXECUTE
;
1781 status
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
1784 if (res
.access
& NFS4_ACCESS_READ
)
1785 entry
->mask
|= MAY_READ
;
1786 if (res
.access
& (NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
))
1787 entry
->mask
|= MAY_WRITE
;
1788 if (res
.access
& (NFS4_ACCESS_LOOKUP
|NFS4_ACCESS_EXECUTE
))
1789 entry
->mask
|= MAY_EXEC
;
1794 static int nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
1796 struct nfs4_exception exception
= { };
1799 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1800 _nfs4_proc_access(inode
, entry
),
1802 } while (exception
.retry
);
1807 * TODO: For the time being, we don't try to get any attributes
1808 * along with any of the zero-copy operations READ, READDIR,
1811 * In the case of the first three, we want to put the GETATTR
1812 * after the read-type operation -- this is because it is hard
1813 * to predict the length of a GETATTR response in v4, and thus
1814 * align the READ data correctly. This means that the GETATTR
1815 * may end up partially falling into the page cache, and we should
1816 * shift it into the 'tail' of the xdr_buf before processing.
1817 * To do this efficiently, we need to know the total length
1818 * of data received, which doesn't seem to be available outside
1821 * In the case of WRITE, we also want to put the GETATTR after
1822 * the operation -- in this case because we want to make sure
1823 * we get the post-operation mtime and size. This means that
1824 * we can't use xdr_encode_pages() as written: we need a variant
1825 * of it which would leave room in the 'tail' iovec.
1827 * Both of these changes to the XDR layer would in fact be quite
1828 * minor, but I decided to leave them for a subsequent patch.
1830 static int _nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
1831 unsigned int pgbase
, unsigned int pglen
)
1833 struct nfs4_readlink args
= {
1834 .fh
= NFS_FH(inode
),
1839 struct rpc_message msg
= {
1840 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READLINK
],
1845 return rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
1848 static int nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
1849 unsigned int pgbase
, unsigned int pglen
)
1851 struct nfs4_exception exception
= { };
1854 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1855 _nfs4_proc_readlink(inode
, page
, pgbase
, pglen
),
1857 } while (exception
.retry
);
1863 * We will need to arrange for the VFS layer to provide an atomic open.
1864 * Until then, this create/open method is prone to inefficiency and race
1865 * conditions due to the lookup, create, and open VFS calls from sys_open()
1866 * placed on the wire.
1868 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1869 * The file will be opened again in the subsequent VFS open call
1870 * (nfs4_proc_file_open).
1872 * The open for read will just hang around to be used by any process that
1873 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1877 nfs4_proc_create(struct inode
*dir
, struct dentry
*dentry
, struct iattr
*sattr
,
1878 int flags
, struct nameidata
*nd
)
1880 struct path path
= {
1884 struct nfs4_state
*state
;
1885 struct rpc_cred
*cred
;
1888 cred
= rpcauth_lookupcred(NFS_CLIENT(dir
)->cl_auth
, 0);
1890 status
= PTR_ERR(cred
);
1893 state
= nfs4_do_open(dir
, &path
, flags
, sattr
, cred
);
1895 if (IS_ERR(state
)) {
1896 status
= PTR_ERR(state
);
1899 d_instantiate(dentry
, igrab(state
->inode
));
1900 if (flags
& O_EXCL
) {
1901 struct nfs_fattr fattr
;
1902 status
= nfs4_do_setattr(state
->inode
, &fattr
, sattr
, state
);
1904 nfs_setattr_update_inode(state
->inode
, sattr
);
1905 nfs_post_op_update_inode(state
->inode
, &fattr
);
1907 if (status
== 0 && (nd
->flags
& LOOKUP_OPEN
) != 0)
1908 status
= nfs4_intent_set_file(nd
, &path
, state
);
1910 nfs4_close_state(&path
, state
, flags
);
1915 static int _nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
1917 struct nfs_server
*server
= NFS_SERVER(dir
);
1918 struct nfs4_remove_arg args
= {
1921 .bitmask
= server
->attr_bitmask
,
1923 struct nfs_fattr dir_attr
;
1924 struct nfs4_remove_res res
= {
1926 .dir_attr
= &dir_attr
,
1928 struct rpc_message msg
= {
1929 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
],
1935 nfs_fattr_init(res
.dir_attr
);
1936 status
= rpc_call_sync(server
->client
, &msg
, 0);
1938 update_changeattr(dir
, &res
.cinfo
);
1939 nfs_post_op_update_inode(dir
, res
.dir_attr
);
1944 static int nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
1946 struct nfs4_exception exception
= { };
1949 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1950 _nfs4_proc_remove(dir
, name
),
1952 } while (exception
.retry
);
1956 struct unlink_desc
{
1957 struct nfs4_remove_arg args
;
1958 struct nfs4_remove_res res
;
1959 struct nfs_fattr dir_attr
;
1962 static int nfs4_proc_unlink_setup(struct rpc_message
*msg
, struct dentry
*dir
,
1965 struct nfs_server
*server
= NFS_SERVER(dir
->d_inode
);
1966 struct unlink_desc
*up
;
1968 up
= kmalloc(sizeof(*up
), GFP_KERNEL
);
1972 up
->args
.fh
= NFS_FH(dir
->d_inode
);
1973 up
->args
.name
= name
;
1974 up
->args
.bitmask
= server
->attr_bitmask
;
1975 up
->res
.server
= server
;
1976 up
->res
.dir_attr
= &up
->dir_attr
;
1978 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
];
1979 msg
->rpc_argp
= &up
->args
;
1980 msg
->rpc_resp
= &up
->res
;
1984 static int nfs4_proc_unlink_done(struct dentry
*dir
, struct rpc_task
*task
)
1986 struct rpc_message
*msg
= &task
->tk_msg
;
1987 struct unlink_desc
*up
;
1989 if (msg
->rpc_resp
!= NULL
) {
1990 up
= container_of(msg
->rpc_resp
, struct unlink_desc
, res
);
1991 update_changeattr(dir
->d_inode
, &up
->res
.cinfo
);
1992 nfs_post_op_update_inode(dir
->d_inode
, up
->res
.dir_attr
);
1994 msg
->rpc_resp
= NULL
;
1995 msg
->rpc_argp
= NULL
;
2000 static int _nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2001 struct inode
*new_dir
, struct qstr
*new_name
)
2003 struct nfs_server
*server
= NFS_SERVER(old_dir
);
2004 struct nfs4_rename_arg arg
= {
2005 .old_dir
= NFS_FH(old_dir
),
2006 .new_dir
= NFS_FH(new_dir
),
2007 .old_name
= old_name
,
2008 .new_name
= new_name
,
2009 .bitmask
= server
->attr_bitmask
,
2011 struct nfs_fattr old_fattr
, new_fattr
;
2012 struct nfs4_rename_res res
= {
2014 .old_fattr
= &old_fattr
,
2015 .new_fattr
= &new_fattr
,
2017 struct rpc_message msg
= {
2018 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENAME
],
2024 nfs_fattr_init(res
.old_fattr
);
2025 nfs_fattr_init(res
.new_fattr
);
2026 status
= rpc_call_sync(server
->client
, &msg
, 0);
2029 update_changeattr(old_dir
, &res
.old_cinfo
);
2030 nfs_post_op_update_inode(old_dir
, res
.old_fattr
);
2031 update_changeattr(new_dir
, &res
.new_cinfo
);
2032 nfs_post_op_update_inode(new_dir
, res
.new_fattr
);
2037 static int nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2038 struct inode
*new_dir
, struct qstr
*new_name
)
2040 struct nfs4_exception exception
= { };
2043 err
= nfs4_handle_exception(NFS_SERVER(old_dir
),
2044 _nfs4_proc_rename(old_dir
, old_name
,
2047 } while (exception
.retry
);
2051 static int _nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2053 struct nfs_server
*server
= NFS_SERVER(inode
);
2054 struct nfs4_link_arg arg
= {
2055 .fh
= NFS_FH(inode
),
2056 .dir_fh
= NFS_FH(dir
),
2058 .bitmask
= server
->attr_bitmask
,
2060 struct nfs_fattr fattr
, dir_attr
;
2061 struct nfs4_link_res res
= {
2064 .dir_attr
= &dir_attr
,
2066 struct rpc_message msg
= {
2067 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LINK
],
2073 nfs_fattr_init(res
.fattr
);
2074 nfs_fattr_init(res
.dir_attr
);
2075 status
= rpc_call_sync(server
->client
, &msg
, 0);
2077 update_changeattr(dir
, &res
.cinfo
);
2078 nfs_post_op_update_inode(dir
, res
.dir_attr
);
2079 nfs_post_op_update_inode(inode
, res
.fattr
);
2085 static int nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2087 struct nfs4_exception exception
= { };
2090 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2091 _nfs4_proc_link(inode
, dir
, name
),
2093 } while (exception
.retry
);
2097 static int _nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2098 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2100 struct nfs_server
*server
= NFS_SERVER(dir
);
2101 struct nfs_fh fhandle
;
2102 struct nfs_fattr fattr
, dir_fattr
;
2103 struct nfs4_create_arg arg
= {
2104 .dir_fh
= NFS_FH(dir
),
2106 .name
= &dentry
->d_name
,
2109 .bitmask
= server
->attr_bitmask
,
2111 struct nfs4_create_res res
= {
2115 .dir_fattr
= &dir_fattr
,
2117 struct rpc_message msg
= {
2118 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SYMLINK
],
2124 if (len
> NFS4_MAXPATHLEN
)
2125 return -ENAMETOOLONG
;
2127 arg
.u
.symlink
.pages
= &page
;
2128 arg
.u
.symlink
.len
= len
;
2129 nfs_fattr_init(&fattr
);
2130 nfs_fattr_init(&dir_fattr
);
2132 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
2134 update_changeattr(dir
, &res
.dir_cinfo
);
2135 nfs_post_op_update_inode(dir
, res
.dir_fattr
);
2136 status
= nfs_instantiate(dentry
, &fhandle
, &fattr
);
2141 static int nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2142 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2144 struct nfs4_exception exception
= { };
2147 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2148 _nfs4_proc_symlink(dir
, dentry
, page
,
2151 } while (exception
.retry
);
2155 static int _nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2156 struct iattr
*sattr
)
2158 struct nfs_server
*server
= NFS_SERVER(dir
);
2159 struct nfs_fh fhandle
;
2160 struct nfs_fattr fattr
, dir_fattr
;
2161 struct nfs4_create_arg arg
= {
2162 .dir_fh
= NFS_FH(dir
),
2164 .name
= &dentry
->d_name
,
2167 .bitmask
= server
->attr_bitmask
,
2169 struct nfs4_create_res res
= {
2173 .dir_fattr
= &dir_fattr
,
2175 struct rpc_message msg
= {
2176 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
],
2182 nfs_fattr_init(&fattr
);
2183 nfs_fattr_init(&dir_fattr
);
2185 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
2187 update_changeattr(dir
, &res
.dir_cinfo
);
2188 nfs_post_op_update_inode(dir
, res
.dir_fattr
);
2189 status
= nfs_instantiate(dentry
, &fhandle
, &fattr
);
2194 static int nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2195 struct iattr
*sattr
)
2197 struct nfs4_exception exception
= { };
2200 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2201 _nfs4_proc_mkdir(dir
, dentry
, sattr
),
2203 } while (exception
.retry
);
2207 static int _nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2208 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2210 struct inode
*dir
= dentry
->d_inode
;
2211 struct nfs4_readdir_arg args
= {
2216 .bitmask
= NFS_SERVER(dentry
->d_inode
)->attr_bitmask
,
2218 struct nfs4_readdir_res res
;
2219 struct rpc_message msg
= {
2220 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READDIR
],
2227 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__
,
2228 dentry
->d_parent
->d_name
.name
,
2229 dentry
->d_name
.name
,
2230 (unsigned long long)cookie
);
2231 nfs4_setup_readdir(cookie
, NFS_COOKIEVERF(dir
), dentry
, &args
);
2232 res
.pgbase
= args
.pgbase
;
2233 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
2235 memcpy(NFS_COOKIEVERF(dir
), res
.verifier
.data
, NFS4_VERIFIER_SIZE
);
2236 dprintk("%s: returns %d\n", __FUNCTION__
, status
);
2240 static int nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2241 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2243 struct nfs4_exception exception
= { };
2246 err
= nfs4_handle_exception(NFS_SERVER(dentry
->d_inode
),
2247 _nfs4_proc_readdir(dentry
, cred
, cookie
,
2250 } while (exception
.retry
);
2254 static int _nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2255 struct iattr
*sattr
, dev_t rdev
)
2257 struct nfs_server
*server
= NFS_SERVER(dir
);
2259 struct nfs_fattr fattr
, dir_fattr
;
2260 struct nfs4_create_arg arg
= {
2261 .dir_fh
= NFS_FH(dir
),
2263 .name
= &dentry
->d_name
,
2265 .bitmask
= server
->attr_bitmask
,
2267 struct nfs4_create_res res
= {
2271 .dir_fattr
= &dir_fattr
,
2273 struct rpc_message msg
= {
2274 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
],
2279 int mode
= sattr
->ia_mode
;
2281 nfs_fattr_init(&fattr
);
2282 nfs_fattr_init(&dir_fattr
);
2284 BUG_ON(!(sattr
->ia_valid
& ATTR_MODE
));
2285 BUG_ON(!S_ISFIFO(mode
) && !S_ISBLK(mode
) && !S_ISCHR(mode
) && !S_ISSOCK(mode
));
2287 arg
.ftype
= NF4FIFO
;
2288 else if (S_ISBLK(mode
)) {
2290 arg
.u
.device
.specdata1
= MAJOR(rdev
);
2291 arg
.u
.device
.specdata2
= MINOR(rdev
);
2293 else if (S_ISCHR(mode
)) {
2295 arg
.u
.device
.specdata1
= MAJOR(rdev
);
2296 arg
.u
.device
.specdata2
= MINOR(rdev
);
2299 arg
.ftype
= NF4SOCK
;
2301 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
2303 update_changeattr(dir
, &res
.dir_cinfo
);
2304 nfs_post_op_update_inode(dir
, res
.dir_fattr
);
2305 status
= nfs_instantiate(dentry
, &fh
, &fattr
);
2310 static int nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2311 struct iattr
*sattr
, dev_t rdev
)
2313 struct nfs4_exception exception
= { };
2316 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2317 _nfs4_proc_mknod(dir
, dentry
, sattr
, rdev
),
2319 } while (exception
.retry
);
2323 static int _nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2324 struct nfs_fsstat
*fsstat
)
2326 struct nfs4_statfs_arg args
= {
2328 .bitmask
= server
->attr_bitmask
,
2330 struct rpc_message msg
= {
2331 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_STATFS
],
2336 nfs_fattr_init(fsstat
->fattr
);
2337 return rpc_call_sync(server
->client
, &msg
, 0);
2340 static int nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsstat
*fsstat
)
2342 struct nfs4_exception exception
= { };
2345 err
= nfs4_handle_exception(server
,
2346 _nfs4_proc_statfs(server
, fhandle
, fsstat
),
2348 } while (exception
.retry
);
2352 static int _nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2353 struct nfs_fsinfo
*fsinfo
)
2355 struct nfs4_fsinfo_arg args
= {
2357 .bitmask
= server
->attr_bitmask
,
2359 struct rpc_message msg
= {
2360 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FSINFO
],
2365 return rpc_call_sync(server
->client
, &msg
, 0);
2368 static int nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2370 struct nfs4_exception exception
= { };
2374 err
= nfs4_handle_exception(server
,
2375 _nfs4_do_fsinfo(server
, fhandle
, fsinfo
),
2377 } while (exception
.retry
);
2381 static int nfs4_proc_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2383 nfs_fattr_init(fsinfo
->fattr
);
2384 return nfs4_do_fsinfo(server
, fhandle
, fsinfo
);
2387 static int _nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2388 struct nfs_pathconf
*pathconf
)
2390 struct nfs4_pathconf_arg args
= {
2392 .bitmask
= server
->attr_bitmask
,
2394 struct rpc_message msg
= {
2395 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_PATHCONF
],
2397 .rpc_resp
= pathconf
,
2400 /* None of the pathconf attributes are mandatory to implement */
2401 if ((args
.bitmask
[0] & nfs4_pathconf_bitmap
[0]) == 0) {
2402 memset(pathconf
, 0, sizeof(*pathconf
));
2406 nfs_fattr_init(pathconf
->fattr
);
2407 return rpc_call_sync(server
->client
, &msg
, 0);
2410 static int nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2411 struct nfs_pathconf
*pathconf
)
2413 struct nfs4_exception exception
= { };
2417 err
= nfs4_handle_exception(server
,
2418 _nfs4_proc_pathconf(server
, fhandle
, pathconf
),
2420 } while (exception
.retry
);
2424 static int nfs4_read_done(struct rpc_task
*task
, struct nfs_read_data
*data
)
2426 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2428 if (nfs4_async_handle_error(task
, server
) == -EAGAIN
) {
2429 rpc_restart_call(task
);
2432 if (task
->tk_status
> 0)
2433 renew_lease(server
, data
->timestamp
);
2437 static void nfs4_proc_read_setup(struct nfs_read_data
*data
)
2439 struct rpc_message msg
= {
2440 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READ
],
2441 .rpc_argp
= &data
->args
,
2442 .rpc_resp
= &data
->res
,
2443 .rpc_cred
= data
->cred
,
2446 data
->timestamp
= jiffies
;
2448 rpc_call_setup(&data
->task
, &msg
, 0);
2451 static int nfs4_write_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
2453 struct inode
*inode
= data
->inode
;
2455 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
)) == -EAGAIN
) {
2456 rpc_restart_call(task
);
2459 if (task
->tk_status
>= 0) {
2460 renew_lease(NFS_SERVER(inode
), data
->timestamp
);
2461 nfs_post_op_update_inode(inode
, data
->res
.fattr
);
2466 static void nfs4_proc_write_setup(struct nfs_write_data
*data
, int how
)
2468 struct rpc_message msg
= {
2469 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_WRITE
],
2470 .rpc_argp
= &data
->args
,
2471 .rpc_resp
= &data
->res
,
2472 .rpc_cred
= data
->cred
,
2474 struct inode
*inode
= data
->inode
;
2475 struct nfs_server
*server
= NFS_SERVER(inode
);
2478 if (how
& FLUSH_STABLE
) {
2479 if (!NFS_I(inode
)->ncommit
)
2480 stable
= NFS_FILE_SYNC
;
2482 stable
= NFS_DATA_SYNC
;
2484 stable
= NFS_UNSTABLE
;
2485 data
->args
.stable
= stable
;
2486 data
->args
.bitmask
= server
->attr_bitmask
;
2487 data
->res
.server
= server
;
2489 data
->timestamp
= jiffies
;
2491 /* Finalize the task. */
2492 rpc_call_setup(&data
->task
, &msg
, 0);
2495 static int nfs4_commit_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
2497 struct inode
*inode
= data
->inode
;
2499 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
)) == -EAGAIN
) {
2500 rpc_restart_call(task
);
2503 if (task
->tk_status
>= 0)
2504 nfs_post_op_update_inode(inode
, data
->res
.fattr
);
2508 static void nfs4_proc_commit_setup(struct nfs_write_data
*data
, int how
)
2510 struct rpc_message msg
= {
2511 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_COMMIT
],
2512 .rpc_argp
= &data
->args
,
2513 .rpc_resp
= &data
->res
,
2514 .rpc_cred
= data
->cred
,
2516 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2518 data
->args
.bitmask
= server
->attr_bitmask
;
2519 data
->res
.server
= server
;
2521 rpc_call_setup(&data
->task
, &msg
, 0);
2525 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2526 * standalone procedure for queueing an asynchronous RENEW.
2528 static void nfs4_renew_done(struct rpc_task
*task
, void *data
)
2530 struct nfs_client
*clp
= (struct nfs_client
*)task
->tk_msg
.rpc_argp
;
2531 unsigned long timestamp
= (unsigned long)data
;
2533 if (task
->tk_status
< 0) {
2534 switch (task
->tk_status
) {
2535 case -NFS4ERR_STALE_CLIENTID
:
2536 case -NFS4ERR_EXPIRED
:
2537 case -NFS4ERR_CB_PATH_DOWN
:
2538 nfs4_schedule_state_recovery(clp
);
2542 spin_lock(&clp
->cl_lock
);
2543 if (time_before(clp
->cl_last_renewal
,timestamp
))
2544 clp
->cl_last_renewal
= timestamp
;
2545 spin_unlock(&clp
->cl_lock
);
2548 static const struct rpc_call_ops nfs4_renew_ops
= {
2549 .rpc_call_done
= nfs4_renew_done
,
2552 int nfs4_proc_async_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2554 struct rpc_message msg
= {
2555 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2560 return rpc_call_async(clp
->cl_rpcclient
, &msg
, RPC_TASK_SOFT
,
2561 &nfs4_renew_ops
, (void *)jiffies
);
2564 int nfs4_proc_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2566 struct rpc_message msg
= {
2567 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2571 unsigned long now
= jiffies
;
2574 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2577 spin_lock(&clp
->cl_lock
);
2578 if (time_before(clp
->cl_last_renewal
,now
))
2579 clp
->cl_last_renewal
= now
;
2580 spin_unlock(&clp
->cl_lock
);
2584 static inline int nfs4_server_supports_acls(struct nfs_server
*server
)
2586 return (server
->caps
& NFS_CAP_ACLS
)
2587 && (server
->acl_bitmask
& ACL4_SUPPORT_ALLOW_ACL
)
2588 && (server
->acl_bitmask
& ACL4_SUPPORT_DENY_ACL
);
2591 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2592 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2595 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2597 static void buf_to_pages(const void *buf
, size_t buflen
,
2598 struct page
**pages
, unsigned int *pgbase
)
2600 const void *p
= buf
;
2602 *pgbase
= offset_in_page(buf
);
2604 while (p
< buf
+ buflen
) {
2605 *(pages
++) = virt_to_page(p
);
2606 p
+= PAGE_CACHE_SIZE
;
2610 struct nfs4_cached_acl
{
2616 static void nfs4_set_cached_acl(struct inode
*inode
, struct nfs4_cached_acl
*acl
)
2618 struct nfs_inode
*nfsi
= NFS_I(inode
);
2620 spin_lock(&inode
->i_lock
);
2621 kfree(nfsi
->nfs4_acl
);
2622 nfsi
->nfs4_acl
= acl
;
2623 spin_unlock(&inode
->i_lock
);
2626 static void nfs4_zap_acl_attr(struct inode
*inode
)
2628 nfs4_set_cached_acl(inode
, NULL
);
2631 static inline ssize_t
nfs4_read_cached_acl(struct inode
*inode
, char *buf
, size_t buflen
)
2633 struct nfs_inode
*nfsi
= NFS_I(inode
);
2634 struct nfs4_cached_acl
*acl
;
2637 spin_lock(&inode
->i_lock
);
2638 acl
= nfsi
->nfs4_acl
;
2641 if (buf
== NULL
) /* user is just asking for length */
2643 if (acl
->cached
== 0)
2645 ret
= -ERANGE
; /* see getxattr(2) man page */
2646 if (acl
->len
> buflen
)
2648 memcpy(buf
, acl
->data
, acl
->len
);
2652 spin_unlock(&inode
->i_lock
);
2656 static void nfs4_write_cached_acl(struct inode
*inode
, const char *buf
, size_t acl_len
)
2658 struct nfs4_cached_acl
*acl
;
2660 if (buf
&& acl_len
<= PAGE_SIZE
) {
2661 acl
= kmalloc(sizeof(*acl
) + acl_len
, GFP_KERNEL
);
2665 memcpy(acl
->data
, buf
, acl_len
);
2667 acl
= kmalloc(sizeof(*acl
), GFP_KERNEL
);
2674 nfs4_set_cached_acl(inode
, acl
);
2677 static ssize_t
__nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
2679 struct page
*pages
[NFS4ACL_MAXPAGES
];
2680 struct nfs_getaclargs args
= {
2681 .fh
= NFS_FH(inode
),
2685 size_t resp_len
= buflen
;
2687 struct rpc_message msg
= {
2688 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETACL
],
2690 .rpc_resp
= &resp_len
,
2692 struct page
*localpage
= NULL
;
2695 if (buflen
< PAGE_SIZE
) {
2696 /* As long as we're doing a round trip to the server anyway,
2697 * let's be prepared for a page of acl data. */
2698 localpage
= alloc_page(GFP_KERNEL
);
2699 resp_buf
= page_address(localpage
);
2700 if (localpage
== NULL
)
2702 args
.acl_pages
[0] = localpage
;
2703 args
.acl_pgbase
= 0;
2704 resp_len
= args
.acl_len
= PAGE_SIZE
;
2707 buf_to_pages(buf
, buflen
, args
.acl_pages
, &args
.acl_pgbase
);
2709 ret
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
2712 if (resp_len
> args
.acl_len
)
2713 nfs4_write_cached_acl(inode
, NULL
, resp_len
);
2715 nfs4_write_cached_acl(inode
, resp_buf
, resp_len
);
2718 if (resp_len
> buflen
)
2721 memcpy(buf
, resp_buf
, resp_len
);
2726 __free_page(localpage
);
2730 static ssize_t
nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
2732 struct nfs4_exception exception
= { };
2735 ret
= __nfs4_get_acl_uncached(inode
, buf
, buflen
);
2738 ret
= nfs4_handle_exception(NFS_SERVER(inode
), ret
, &exception
);
2739 } while (exception
.retry
);
2743 static ssize_t
nfs4_proc_get_acl(struct inode
*inode
, void *buf
, size_t buflen
)
2745 struct nfs_server
*server
= NFS_SERVER(inode
);
2748 if (!nfs4_server_supports_acls(server
))
2750 ret
= nfs_revalidate_inode(server
, inode
);
2753 ret
= nfs4_read_cached_acl(inode
, buf
, buflen
);
2756 return nfs4_get_acl_uncached(inode
, buf
, buflen
);
2759 static int __nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
2761 struct nfs_server
*server
= NFS_SERVER(inode
);
2762 struct page
*pages
[NFS4ACL_MAXPAGES
];
2763 struct nfs_setaclargs arg
= {
2764 .fh
= NFS_FH(inode
),
2768 struct rpc_message msg
= {
2769 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETACL
],
2775 if (!nfs4_server_supports_acls(server
))
2777 nfs_inode_return_delegation(inode
);
2778 buf_to_pages(buf
, buflen
, arg
.acl_pages
, &arg
.acl_pgbase
);
2779 ret
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
2780 nfs_zap_caches(inode
);
2784 static int nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
2786 struct nfs4_exception exception
= { };
2789 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2790 __nfs4_proc_set_acl(inode
, buf
, buflen
),
2792 } while (exception
.retry
);
2797 nfs4_async_handle_error(struct rpc_task
*task
, const struct nfs_server
*server
)
2799 struct nfs_client
*clp
= server
->nfs_client
;
2801 if (!clp
|| task
->tk_status
>= 0)
2803 switch(task
->tk_status
) {
2804 case -NFS4ERR_STALE_CLIENTID
:
2805 case -NFS4ERR_STALE_STATEID
:
2806 case -NFS4ERR_EXPIRED
:
2807 rpc_sleep_on(&clp
->cl_rpcwaitq
, task
, NULL
, NULL
);
2808 nfs4_schedule_state_recovery(clp
);
2809 if (test_bit(NFS4CLNT_STATE_RECOVER
, &clp
->cl_state
) == 0)
2810 rpc_wake_up_task(task
);
2811 task
->tk_status
= 0;
2813 case -NFS4ERR_DELAY
:
2814 nfs_inc_server_stats((struct nfs_server
*) server
,
2816 case -NFS4ERR_GRACE
:
2817 rpc_delay(task
, NFS4_POLL_RETRY_MAX
);
2818 task
->tk_status
= 0;
2820 case -NFS4ERR_OLD_STATEID
:
2821 task
->tk_status
= 0;
2824 task
->tk_status
= nfs4_map_errors(task
->tk_status
);
2828 static int nfs4_wait_bit_interruptible(void *word
)
2830 if (signal_pending(current
))
2831 return -ERESTARTSYS
;
2836 static int nfs4_wait_clnt_recover(struct rpc_clnt
*clnt
, struct nfs_client
*clp
)
2843 rwsem_acquire(&clp
->cl_sem
.dep_map
, 0, 0, _RET_IP_
);
2845 rpc_clnt_sigmask(clnt
, &oldset
);
2846 res
= wait_on_bit(&clp
->cl_state
, NFS4CLNT_STATE_RECOVER
,
2847 nfs4_wait_bit_interruptible
,
2848 TASK_INTERRUPTIBLE
);
2849 rpc_clnt_sigunmask(clnt
, &oldset
);
2851 rwsem_release(&clp
->cl_sem
.dep_map
, 1, _RET_IP_
);
2855 static int nfs4_delay(struct rpc_clnt
*clnt
, long *timeout
)
2863 *timeout
= NFS4_POLL_RETRY_MIN
;
2864 if (*timeout
> NFS4_POLL_RETRY_MAX
)
2865 *timeout
= NFS4_POLL_RETRY_MAX
;
2866 rpc_clnt_sigmask(clnt
, &oldset
);
2867 if (clnt
->cl_intr
) {
2868 schedule_timeout_interruptible(*timeout
);
2872 schedule_timeout_uninterruptible(*timeout
);
2873 rpc_clnt_sigunmask(clnt
, &oldset
);
2878 /* This is the error handling routine for processes that are allowed
2881 static int nfs4_handle_exception(const struct nfs_server
*server
, int errorcode
, struct nfs4_exception
*exception
)
2883 struct nfs_client
*clp
= server
->nfs_client
;
2884 int ret
= errorcode
;
2886 exception
->retry
= 0;
2890 case -NFS4ERR_STALE_CLIENTID
:
2891 case -NFS4ERR_STALE_STATEID
:
2892 case -NFS4ERR_EXPIRED
:
2893 nfs4_schedule_state_recovery(clp
);
2894 ret
= nfs4_wait_clnt_recover(server
->client
, clp
);
2896 exception
->retry
= 1;
2898 case -NFS4ERR_FILE_OPEN
:
2899 case -NFS4ERR_GRACE
:
2900 case -NFS4ERR_DELAY
:
2901 ret
= nfs4_delay(server
->client
, &exception
->timeout
);
2904 case -NFS4ERR_OLD_STATEID
:
2905 exception
->retry
= 1;
2907 /* We failed to handle the error */
2908 return nfs4_map_errors(ret
);
2911 int nfs4_proc_setclientid(struct nfs_client
*clp
, u32 program
, unsigned short port
, struct rpc_cred
*cred
)
2913 nfs4_verifier sc_verifier
;
2914 struct nfs4_setclientid setclientid
= {
2915 .sc_verifier
= &sc_verifier
,
2918 struct rpc_message msg
= {
2919 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID
],
2920 .rpc_argp
= &setclientid
,
2928 p
= (__be32
*)sc_verifier
.data
;
2929 *p
++ = htonl((u32
)clp
->cl_boot_time
.tv_sec
);
2930 *p
= htonl((u32
)clp
->cl_boot_time
.tv_nsec
);
2933 setclientid
.sc_name_len
= scnprintf(setclientid
.sc_name
,
2934 sizeof(setclientid
.sc_name
), "%s/%u.%u.%u.%u %s %u",
2935 clp
->cl_ipaddr
, NIPQUAD(clp
->cl_addr
.sin_addr
),
2936 cred
->cr_ops
->cr_name
,
2937 clp
->cl_id_uniquifier
);
2938 setclientid
.sc_netid_len
= scnprintf(setclientid
.sc_netid
,
2939 sizeof(setclientid
.sc_netid
), "tcp");
2940 setclientid
.sc_uaddr_len
= scnprintf(setclientid
.sc_uaddr
,
2941 sizeof(setclientid
.sc_uaddr
), "%s.%d.%d",
2942 clp
->cl_ipaddr
, port
>> 8, port
& 255);
2944 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2945 if (status
!= -NFS4ERR_CLID_INUSE
)
2950 ssleep(clp
->cl_lease_time
+ 1);
2952 if (++clp
->cl_id_uniquifier
== 0)
2958 static int _nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2960 struct nfs_fsinfo fsinfo
;
2961 struct rpc_message msg
= {
2962 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID_CONFIRM
],
2964 .rpc_resp
= &fsinfo
,
2971 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2973 spin_lock(&clp
->cl_lock
);
2974 clp
->cl_lease_time
= fsinfo
.lease_time
* HZ
;
2975 clp
->cl_last_renewal
= now
;
2976 clear_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
2977 spin_unlock(&clp
->cl_lock
);
2982 int nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2987 err
= _nfs4_proc_setclientid_confirm(clp
, cred
);
2991 case -NFS4ERR_RESOURCE
:
2992 /* The IBM lawyers misread another document! */
2993 case -NFS4ERR_DELAY
:
2994 err
= nfs4_delay(clp
->cl_rpcclient
, &timeout
);
3000 struct nfs4_delegreturndata
{
3001 struct nfs4_delegreturnargs args
;
3002 struct nfs4_delegreturnres res
;
3004 nfs4_stateid stateid
;
3005 struct rpc_cred
*cred
;
3006 unsigned long timestamp
;
3007 struct nfs_fattr fattr
;
3011 static void nfs4_delegreturn_prepare(struct rpc_task
*task
, void *calldata
)
3013 struct nfs4_delegreturndata
*data
= calldata
;
3014 struct rpc_message msg
= {
3015 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DELEGRETURN
],
3016 .rpc_argp
= &data
->args
,
3017 .rpc_resp
= &data
->res
,
3018 .rpc_cred
= data
->cred
,
3020 nfs_fattr_init(data
->res
.fattr
);
3021 rpc_call_setup(task
, &msg
, 0);
3024 static void nfs4_delegreturn_done(struct rpc_task
*task
, void *calldata
)
3026 struct nfs4_delegreturndata
*data
= calldata
;
3027 data
->rpc_status
= task
->tk_status
;
3028 if (data
->rpc_status
== 0)
3029 renew_lease(data
->res
.server
, data
->timestamp
);
3032 static void nfs4_delegreturn_release(void *calldata
)
3034 struct nfs4_delegreturndata
*data
= calldata
;
3036 put_rpccred(data
->cred
);
3040 static const struct rpc_call_ops nfs4_delegreturn_ops
= {
3041 .rpc_call_prepare
= nfs4_delegreturn_prepare
,
3042 .rpc_call_done
= nfs4_delegreturn_done
,
3043 .rpc_release
= nfs4_delegreturn_release
,
3046 static int _nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
)
3048 struct nfs4_delegreturndata
*data
;
3049 struct nfs_server
*server
= NFS_SERVER(inode
);
3050 struct rpc_task
*task
;
3053 data
= kmalloc(sizeof(*data
), GFP_KERNEL
);
3056 data
->args
.fhandle
= &data
->fh
;
3057 data
->args
.stateid
= &data
->stateid
;
3058 data
->args
.bitmask
= server
->attr_bitmask
;
3059 nfs_copy_fh(&data
->fh
, NFS_FH(inode
));
3060 memcpy(&data
->stateid
, stateid
, sizeof(data
->stateid
));
3061 data
->res
.fattr
= &data
->fattr
;
3062 data
->res
.server
= server
;
3063 data
->cred
= get_rpccred(cred
);
3064 data
->timestamp
= jiffies
;
3065 data
->rpc_status
= 0;
3067 task
= rpc_run_task(NFS_CLIENT(inode
), RPC_TASK_ASYNC
, &nfs4_delegreturn_ops
, data
);
3069 return PTR_ERR(task
);
3070 status
= nfs4_wait_for_completion_rpc_task(task
);
3072 status
= data
->rpc_status
;
3074 nfs_post_op_update_inode(inode
, &data
->fattr
);
3080 int nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
)
3082 struct nfs_server
*server
= NFS_SERVER(inode
);
3083 struct nfs4_exception exception
= { };
3086 err
= _nfs4_proc_delegreturn(inode
, cred
, stateid
);
3088 case -NFS4ERR_STALE_STATEID
:
3089 case -NFS4ERR_EXPIRED
:
3093 err
= nfs4_handle_exception(server
, err
, &exception
);
3094 } while (exception
.retry
);
3098 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3099 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3102 * sleep, with exponential backoff, and retry the LOCK operation.
3104 static unsigned long
3105 nfs4_set_lock_task_retry(unsigned long timeout
)
3107 schedule_timeout_interruptible(timeout
);
3109 if (timeout
> NFS4_LOCK_MAXTIMEOUT
)
3110 return NFS4_LOCK_MAXTIMEOUT
;
3114 static int _nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3116 struct inode
*inode
= state
->inode
;
3117 struct nfs_server
*server
= NFS_SERVER(inode
);
3118 struct nfs_client
*clp
= server
->nfs_client
;
3119 struct nfs_lockt_args arg
= {
3120 .fh
= NFS_FH(inode
),
3123 struct nfs_lockt_res res
= {
3126 struct rpc_message msg
= {
3127 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKT
],
3130 .rpc_cred
= state
->owner
->so_cred
,
3132 struct nfs4_lock_state
*lsp
;
3135 down_read(&clp
->cl_sem
);
3136 arg
.lock_owner
.clientid
= clp
->cl_clientid
;
3137 status
= nfs4_set_lock_state(state
, request
);
3140 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3141 arg
.lock_owner
.id
= lsp
->ls_id
.id
;
3142 status
= rpc_call_sync(server
->client
, &msg
, 0);
3145 request
->fl_type
= F_UNLCK
;
3147 case -NFS4ERR_DENIED
:
3150 request
->fl_ops
->fl_release_private(request
);
3152 up_read(&clp
->cl_sem
);
3156 static int nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3158 struct nfs4_exception exception
= { };
3162 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3163 _nfs4_proc_getlk(state
, cmd
, request
),
3165 } while (exception
.retry
);
3169 static int do_vfs_lock(struct file
*file
, struct file_lock
*fl
)
3172 switch (fl
->fl_flags
& (FL_POSIX
|FL_FLOCK
)) {
3174 res
= posix_lock_file_wait(file
, fl
);
3177 res
= flock_lock_file_wait(file
, fl
);
3185 struct nfs4_unlockdata
{
3186 struct nfs_locku_args arg
;
3187 struct nfs_locku_res res
;
3188 struct nfs4_lock_state
*lsp
;
3189 struct nfs_open_context
*ctx
;
3190 struct file_lock fl
;
3191 const struct nfs_server
*server
;
3192 unsigned long timestamp
;
3195 static struct nfs4_unlockdata
*nfs4_alloc_unlockdata(struct file_lock
*fl
,
3196 struct nfs_open_context
*ctx
,
3197 struct nfs4_lock_state
*lsp
,
3198 struct nfs_seqid
*seqid
)
3200 struct nfs4_unlockdata
*p
;
3201 struct inode
*inode
= lsp
->ls_state
->inode
;
3203 p
= kmalloc(sizeof(*p
), GFP_KERNEL
);
3206 p
->arg
.fh
= NFS_FH(inode
);
3208 p
->arg
.seqid
= seqid
;
3209 p
->arg
.stateid
= &lsp
->ls_stateid
;
3211 atomic_inc(&lsp
->ls_count
);
3212 /* Ensure we don't close file until we're done freeing locks! */
3213 p
->ctx
= get_nfs_open_context(ctx
);
3214 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3215 p
->server
= NFS_SERVER(inode
);
3219 static void nfs4_locku_release_calldata(void *data
)
3221 struct nfs4_unlockdata
*calldata
= data
;
3222 nfs_free_seqid(calldata
->arg
.seqid
);
3223 nfs4_put_lock_state(calldata
->lsp
);
3224 put_nfs_open_context(calldata
->ctx
);
3228 static void nfs4_locku_done(struct rpc_task
*task
, void *data
)
3230 struct nfs4_unlockdata
*calldata
= data
;
3232 if (RPC_ASSASSINATED(task
))
3234 nfs_increment_lock_seqid(task
->tk_status
, calldata
->arg
.seqid
);
3235 switch (task
->tk_status
) {
3237 memcpy(calldata
->lsp
->ls_stateid
.data
,
3238 calldata
->res
.stateid
.data
,
3239 sizeof(calldata
->lsp
->ls_stateid
.data
));
3240 renew_lease(calldata
->server
, calldata
->timestamp
);
3242 case -NFS4ERR_STALE_STATEID
:
3243 case -NFS4ERR_EXPIRED
:
3246 if (nfs4_async_handle_error(task
, calldata
->server
) == -EAGAIN
)
3247 rpc_restart_call(task
);
3251 static void nfs4_locku_prepare(struct rpc_task
*task
, void *data
)
3253 struct nfs4_unlockdata
*calldata
= data
;
3254 struct rpc_message msg
= {
3255 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKU
],
3256 .rpc_argp
= &calldata
->arg
,
3257 .rpc_resp
= &calldata
->res
,
3258 .rpc_cred
= calldata
->lsp
->ls_state
->owner
->so_cred
,
3261 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
3263 if ((calldata
->lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) == 0) {
3264 /* Note: exit _without_ running nfs4_locku_done */
3265 task
->tk_action
= NULL
;
3268 calldata
->timestamp
= jiffies
;
3269 rpc_call_setup(task
, &msg
, 0);
3272 static const struct rpc_call_ops nfs4_locku_ops
= {
3273 .rpc_call_prepare
= nfs4_locku_prepare
,
3274 .rpc_call_done
= nfs4_locku_done
,
3275 .rpc_release
= nfs4_locku_release_calldata
,
3278 static struct rpc_task
*nfs4_do_unlck(struct file_lock
*fl
,
3279 struct nfs_open_context
*ctx
,
3280 struct nfs4_lock_state
*lsp
,
3281 struct nfs_seqid
*seqid
)
3283 struct nfs4_unlockdata
*data
;
3285 data
= nfs4_alloc_unlockdata(fl
, ctx
, lsp
, seqid
);
3287 nfs_free_seqid(seqid
);
3288 return ERR_PTR(-ENOMEM
);
3291 return rpc_run_task(NFS_CLIENT(lsp
->ls_state
->inode
), RPC_TASK_ASYNC
, &nfs4_locku_ops
, data
);
3294 static int nfs4_proc_unlck(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3296 struct nfs_seqid
*seqid
;
3297 struct nfs4_lock_state
*lsp
;
3298 struct rpc_task
*task
;
3301 status
= nfs4_set_lock_state(state
, request
);
3302 /* Unlock _before_ we do the RPC call */
3303 request
->fl_flags
|= FL_EXISTS
;
3304 if (do_vfs_lock(request
->fl_file
, request
) == -ENOENT
)
3308 /* Is this a delegated lock? */
3309 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
3311 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3312 seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3316 task
= nfs4_do_unlck(request
, request
->fl_file
->private_data
, lsp
, seqid
);
3317 status
= PTR_ERR(task
);
3320 status
= nfs4_wait_for_completion_rpc_task(task
);
3326 struct nfs4_lockdata
{
3327 struct nfs_lock_args arg
;
3328 struct nfs_lock_res res
;
3329 struct nfs4_lock_state
*lsp
;
3330 struct nfs_open_context
*ctx
;
3331 struct file_lock fl
;
3332 unsigned long timestamp
;
3337 static struct nfs4_lockdata
*nfs4_alloc_lockdata(struct file_lock
*fl
,
3338 struct nfs_open_context
*ctx
, struct nfs4_lock_state
*lsp
)
3340 struct nfs4_lockdata
*p
;
3341 struct inode
*inode
= lsp
->ls_state
->inode
;
3342 struct nfs_server
*server
= NFS_SERVER(inode
);
3344 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
3348 p
->arg
.fh
= NFS_FH(inode
);
3350 p
->arg
.lock_seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3351 if (p
->arg
.lock_seqid
== NULL
)
3353 p
->arg
.lock_stateid
= &lsp
->ls_stateid
;
3354 p
->arg
.lock_owner
.clientid
= server
->nfs_client
->cl_clientid
;
3355 p
->arg
.lock_owner
.id
= lsp
->ls_id
.id
;
3357 atomic_inc(&lsp
->ls_count
);
3358 p
->ctx
= get_nfs_open_context(ctx
);
3359 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3366 static void nfs4_lock_prepare(struct rpc_task
*task
, void *calldata
)
3368 struct nfs4_lockdata
*data
= calldata
;
3369 struct nfs4_state
*state
= data
->lsp
->ls_state
;
3370 struct nfs4_state_owner
*sp
= state
->owner
;
3371 struct rpc_message msg
= {
3372 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCK
],
3373 .rpc_argp
= &data
->arg
,
3374 .rpc_resp
= &data
->res
,
3375 .rpc_cred
= sp
->so_cred
,
3378 if (nfs_wait_on_sequence(data
->arg
.lock_seqid
, task
) != 0)
3380 dprintk("%s: begin!\n", __FUNCTION__
);
3381 /* Do we need to do an open_to_lock_owner? */
3382 if (!(data
->arg
.lock_seqid
->sequence
->flags
& NFS_SEQID_CONFIRMED
)) {
3383 data
->arg
.open_seqid
= nfs_alloc_seqid(&sp
->so_seqid
);
3384 if (data
->arg
.open_seqid
== NULL
) {
3385 data
->rpc_status
= -ENOMEM
;
3386 task
->tk_action
= NULL
;
3389 data
->arg
.open_stateid
= &state
->stateid
;
3390 data
->arg
.new_lock_owner
= 1;
3392 data
->timestamp
= jiffies
;
3393 rpc_call_setup(task
, &msg
, 0);
3395 dprintk("%s: done!, ret = %d\n", __FUNCTION__
, data
->rpc_status
);
3398 static void nfs4_lock_done(struct rpc_task
*task
, void *calldata
)
3400 struct nfs4_lockdata
*data
= calldata
;
3402 dprintk("%s: begin!\n", __FUNCTION__
);
3404 data
->rpc_status
= task
->tk_status
;
3405 if (RPC_ASSASSINATED(task
))
3407 if (data
->arg
.new_lock_owner
!= 0) {
3408 nfs_increment_open_seqid(data
->rpc_status
, data
->arg
.open_seqid
);
3409 if (data
->rpc_status
== 0)
3410 nfs_confirm_seqid(&data
->lsp
->ls_seqid
, 0);
3414 if (data
->rpc_status
== 0) {
3415 memcpy(data
->lsp
->ls_stateid
.data
, data
->res
.stateid
.data
,
3416 sizeof(data
->lsp
->ls_stateid
.data
));
3417 data
->lsp
->ls_flags
|= NFS_LOCK_INITIALIZED
;
3418 renew_lease(NFS_SERVER(data
->ctx
->path
.dentry
->d_inode
), data
->timestamp
);
3420 nfs_increment_lock_seqid(data
->rpc_status
, data
->arg
.lock_seqid
);
3422 dprintk("%s: done, ret = %d!\n", __FUNCTION__
, data
->rpc_status
);
3425 static void nfs4_lock_release(void *calldata
)
3427 struct nfs4_lockdata
*data
= calldata
;
3429 dprintk("%s: begin!\n", __FUNCTION__
);
3430 if (data
->arg
.open_seqid
!= NULL
)
3431 nfs_free_seqid(data
->arg
.open_seqid
);
3432 if (data
->cancelled
!= 0) {
3433 struct rpc_task
*task
;
3434 task
= nfs4_do_unlck(&data
->fl
, data
->ctx
, data
->lsp
,
3435 data
->arg
.lock_seqid
);
3438 dprintk("%s: cancelling lock!\n", __FUNCTION__
);
3440 nfs_free_seqid(data
->arg
.lock_seqid
);
3441 nfs4_put_lock_state(data
->lsp
);
3442 put_nfs_open_context(data
->ctx
);
3444 dprintk("%s: done!\n", __FUNCTION__
);
3447 static const struct rpc_call_ops nfs4_lock_ops
= {
3448 .rpc_call_prepare
= nfs4_lock_prepare
,
3449 .rpc_call_done
= nfs4_lock_done
,
3450 .rpc_release
= nfs4_lock_release
,
3453 static int _nfs4_do_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*fl
, int reclaim
)
3455 struct nfs4_lockdata
*data
;
3456 struct rpc_task
*task
;
3459 dprintk("%s: begin!\n", __FUNCTION__
);
3460 data
= nfs4_alloc_lockdata(fl
, fl
->fl_file
->private_data
,
3461 fl
->fl_u
.nfs4_fl
.owner
);
3465 data
->arg
.block
= 1;
3467 data
->arg
.reclaim
= 1;
3468 task
= rpc_run_task(NFS_CLIENT(state
->inode
), RPC_TASK_ASYNC
,
3469 &nfs4_lock_ops
, data
);
3471 return PTR_ERR(task
);
3472 ret
= nfs4_wait_for_completion_rpc_task(task
);
3474 ret
= data
->rpc_status
;
3475 if (ret
== -NFS4ERR_DENIED
)
3478 data
->cancelled
= 1;
3480 dprintk("%s: done, ret = %d!\n", __FUNCTION__
, ret
);
3484 static int nfs4_lock_reclaim(struct nfs4_state
*state
, struct file_lock
*request
)
3486 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3487 struct nfs4_exception exception
= { };
3491 /* Cache the lock if possible... */
3492 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
3494 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 1);
3495 if (err
!= -NFS4ERR_DELAY
)
3497 nfs4_handle_exception(server
, err
, &exception
);
3498 } while (exception
.retry
);
3502 static int nfs4_lock_expired(struct nfs4_state
*state
, struct file_lock
*request
)
3504 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3505 struct nfs4_exception exception
= { };
3508 err
= nfs4_set_lock_state(state
, request
);
3512 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
3514 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 0);
3515 if (err
!= -NFS4ERR_DELAY
)
3517 nfs4_handle_exception(server
, err
, &exception
);
3518 } while (exception
.retry
);
3522 static int _nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3524 struct nfs_client
*clp
= state
->owner
->so_client
;
3525 unsigned char fl_flags
= request
->fl_flags
;
3528 /* Is this a delegated open? */
3529 status
= nfs4_set_lock_state(state
, request
);
3532 request
->fl_flags
|= FL_ACCESS
;
3533 status
= do_vfs_lock(request
->fl_file
, request
);
3536 down_read(&clp
->cl_sem
);
3537 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
)) {
3538 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
3539 /* Yes: cache locks! */
3540 down_read(&nfsi
->rwsem
);
3541 /* ...but avoid races with delegation recall... */
3542 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
)) {
3543 request
->fl_flags
= fl_flags
& ~FL_SLEEP
;
3544 status
= do_vfs_lock(request
->fl_file
, request
);
3545 up_read(&nfsi
->rwsem
);
3548 up_read(&nfsi
->rwsem
);
3550 status
= _nfs4_do_setlk(state
, cmd
, request
, 0);
3553 /* Note: we always want to sleep here! */
3554 request
->fl_flags
= fl_flags
| FL_SLEEP
;
3555 if (do_vfs_lock(request
->fl_file
, request
) < 0)
3556 printk(KERN_WARNING
"%s: VFS is out of sync with lock manager!\n", __FUNCTION__
);
3558 up_read(&clp
->cl_sem
);
3560 request
->fl_flags
= fl_flags
;
3564 static int nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3566 struct nfs4_exception exception
= { };
3570 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3571 _nfs4_proc_setlk(state
, cmd
, request
),
3573 } while (exception
.retry
);
3578 nfs4_proc_lock(struct file
*filp
, int cmd
, struct file_lock
*request
)
3580 struct nfs_open_context
*ctx
;
3581 struct nfs4_state
*state
;
3582 unsigned long timeout
= NFS4_LOCK_MINTIMEOUT
;
3585 /* verify open state */
3586 ctx
= (struct nfs_open_context
*)filp
->private_data
;
3589 if (request
->fl_start
< 0 || request
->fl_end
< 0)
3593 return nfs4_proc_getlk(state
, F_GETLK
, request
);
3595 if (!(IS_SETLK(cmd
) || IS_SETLKW(cmd
)))
3598 if (request
->fl_type
== F_UNLCK
)
3599 return nfs4_proc_unlck(state
, cmd
, request
);
3602 status
= nfs4_proc_setlk(state
, cmd
, request
);
3603 if ((status
!= -EAGAIN
) || IS_SETLK(cmd
))
3605 timeout
= nfs4_set_lock_task_retry(timeout
);
3606 status
= -ERESTARTSYS
;
3609 } while(status
< 0);
3613 int nfs4_lock_delegation_recall(struct nfs4_state
*state
, struct file_lock
*fl
)
3615 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3616 struct nfs4_exception exception
= { };
3619 err
= nfs4_set_lock_state(state
, fl
);
3623 err
= _nfs4_do_setlk(state
, F_SETLK
, fl
, 0);
3624 if (err
!= -NFS4ERR_DELAY
)
3626 err
= nfs4_handle_exception(server
, err
, &exception
);
3627 } while (exception
.retry
);
3632 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3634 int nfs4_setxattr(struct dentry
*dentry
, const char *key
, const void *buf
,
3635 size_t buflen
, int flags
)
3637 struct inode
*inode
= dentry
->d_inode
;
3639 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
3642 if (!S_ISREG(inode
->i_mode
) &&
3643 (!S_ISDIR(inode
->i_mode
) || inode
->i_mode
& S_ISVTX
))
3646 return nfs4_proc_set_acl(inode
, buf
, buflen
);
3649 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3650 * and that's what we'll do for e.g. user attributes that haven't been set.
3651 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3652 * attributes in kernel-managed attribute namespaces. */
3653 ssize_t
nfs4_getxattr(struct dentry
*dentry
, const char *key
, void *buf
,
3656 struct inode
*inode
= dentry
->d_inode
;
3658 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
3661 return nfs4_proc_get_acl(inode
, buf
, buflen
);
3664 ssize_t
nfs4_listxattr(struct dentry
*dentry
, char *buf
, size_t buflen
)
3666 size_t len
= strlen(XATTR_NAME_NFSV4_ACL
) + 1;
3668 if (!nfs4_server_supports_acls(NFS_SERVER(dentry
->d_inode
)))
3670 if (buf
&& buflen
< len
)
3673 memcpy(buf
, XATTR_NAME_NFSV4_ACL
, len
);
3677 int nfs4_proc_fs_locations(struct inode
*dir
, struct qstr
*name
,
3678 struct nfs4_fs_locations
*fs_locations
, struct page
*page
)
3680 struct nfs_server
*server
= NFS_SERVER(dir
);
3682 [0] = FATTR4_WORD0_FSID
| FATTR4_WORD0_FS_LOCATIONS
,
3683 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID
,
3685 struct nfs4_fs_locations_arg args
= {
3686 .dir_fh
= NFS_FH(dir
),
3691 struct rpc_message msg
= {
3692 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FS_LOCATIONS
],
3694 .rpc_resp
= fs_locations
,
3698 dprintk("%s: start\n", __FUNCTION__
);
3699 nfs_fattr_init(&fs_locations
->fattr
);
3700 fs_locations
->server
= server
;
3701 fs_locations
->nlocations
= 0;
3702 status
= rpc_call_sync(server
->client
, &msg
, 0);
3703 dprintk("%s: returned status = %d\n", __FUNCTION__
, status
);
3707 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops
= {
3708 .recover_open
= nfs4_open_reclaim
,
3709 .recover_lock
= nfs4_lock_reclaim
,
3712 struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops
= {
3713 .recover_open
= nfs4_open_expired
,
3714 .recover_lock
= nfs4_lock_expired
,
3717 static const struct inode_operations nfs4_file_inode_operations
= {
3718 .permission
= nfs_permission
,
3719 .getattr
= nfs_getattr
,
3720 .setattr
= nfs_setattr
,
3721 .getxattr
= nfs4_getxattr
,
3722 .setxattr
= nfs4_setxattr
,
3723 .listxattr
= nfs4_listxattr
,
3726 const struct nfs_rpc_ops nfs_v4_clientops
= {
3727 .version
= 4, /* protocol version */
3728 .dentry_ops
= &nfs4_dentry_operations
,
3729 .dir_inode_ops
= &nfs4_dir_inode_operations
,
3730 .file_inode_ops
= &nfs4_file_inode_operations
,
3731 .getroot
= nfs4_proc_get_root
,
3732 .getattr
= nfs4_proc_getattr
,
3733 .setattr
= nfs4_proc_setattr
,
3734 .lookupfh
= nfs4_proc_lookupfh
,
3735 .lookup
= nfs4_proc_lookup
,
3736 .access
= nfs4_proc_access
,
3737 .readlink
= nfs4_proc_readlink
,
3738 .create
= nfs4_proc_create
,
3739 .remove
= nfs4_proc_remove
,
3740 .unlink_setup
= nfs4_proc_unlink_setup
,
3741 .unlink_done
= nfs4_proc_unlink_done
,
3742 .rename
= nfs4_proc_rename
,
3743 .link
= nfs4_proc_link
,
3744 .symlink
= nfs4_proc_symlink
,
3745 .mkdir
= nfs4_proc_mkdir
,
3746 .rmdir
= nfs4_proc_remove
,
3747 .readdir
= nfs4_proc_readdir
,
3748 .mknod
= nfs4_proc_mknod
,
3749 .statfs
= nfs4_proc_statfs
,
3750 .fsinfo
= nfs4_proc_fsinfo
,
3751 .pathconf
= nfs4_proc_pathconf
,
3752 .set_capabilities
= nfs4_server_capabilities
,
3753 .decode_dirent
= nfs4_decode_dirent
,
3754 .read_setup
= nfs4_proc_read_setup
,
3755 .read_done
= nfs4_read_done
,
3756 .write_setup
= nfs4_proc_write_setup
,
3757 .write_done
= nfs4_write_done
,
3758 .commit_setup
= nfs4_proc_commit_setup
,
3759 .commit_done
= nfs4_commit_done
,
3760 .file_open
= nfs_open
,
3761 .file_release
= nfs_release
,
3762 .lock
= nfs4_proc_lock
,
3763 .clear_acl_cache
= nfs4_zap_acl_attr
,