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 write_seqlock(&state
->seqlock
);
389 nfs_set_open_stateid_locked(state
, stateid
, open_flags
);
390 write_sequnlock(&state
->seqlock
);
393 static void update_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*open_stateid
, nfs4_stateid
*deleg_stateid
, int open_flags
)
395 open_flags
&= (FMODE_READ
|FMODE_WRITE
);
397 * Protect the call to nfs4_state_set_mode_locked and
398 * serialise the stateid update
400 write_seqlock(&state
->seqlock
);
401 if (deleg_stateid
!= NULL
) {
402 memcpy(state
->stateid
.data
, deleg_stateid
->data
, sizeof(state
->stateid
.data
));
403 set_bit(NFS_DELEGATED_STATE
, &state
->flags
);
405 if (open_stateid
!= NULL
)
406 nfs_set_open_stateid_locked(state
, open_stateid
, open_flags
);
407 write_sequnlock(&state
->seqlock
);
408 spin_lock(&state
->owner
->so_lock
);
409 update_open_stateflags(state
, open_flags
);
410 spin_unlock(&state
->owner
->so_lock
);
413 static void nfs4_return_incompatible_delegation(struct inode
*inode
, mode_t open_flags
)
415 struct nfs_delegation
*delegation
;
418 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
419 if (delegation
== NULL
|| (delegation
->type
& open_flags
) == open_flags
) {
424 nfs_inode_return_delegation(inode
);
427 static struct nfs4_state
*nfs4_try_open_cached(struct nfs4_opendata
*opendata
)
429 struct nfs4_state
*state
= opendata
->state
;
430 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
431 struct nfs_delegation
*delegation
;
432 int open_mode
= opendata
->o_arg
.open_flags
& (FMODE_READ
|FMODE_WRITE
|O_EXCL
);
433 nfs4_stateid stateid
;
437 delegation
= rcu_dereference(nfsi
->delegation
);
439 if (can_open_cached(state
, open_mode
)) {
440 spin_lock(&state
->owner
->so_lock
);
441 if (can_open_cached(state
, open_mode
)) {
442 update_open_stateflags(state
, open_mode
);
443 spin_unlock(&state
->owner
->so_lock
);
445 goto out_return_state
;
447 spin_unlock(&state
->owner
->so_lock
);
449 if (delegation
== NULL
)
451 if (!can_open_delegated(delegation
, open_mode
))
453 /* Save the delegation */
454 memcpy(stateid
.data
, delegation
->stateid
.data
, sizeof(stateid
.data
));
457 ret
= _nfs4_do_access(state
->inode
, state
->owner
->so_cred
, open_mode
);
463 delegation
= rcu_dereference(nfsi
->delegation
);
464 /* If no delegation, try a cached open */
465 if (delegation
== NULL
)
467 /* Is the delegation still valid? */
468 if (memcmp(stateid
.data
, delegation
->stateid
.data
, sizeof(stateid
.data
)) != 0)
471 update_open_stateid(state
, NULL
, &stateid
, open_mode
);
472 goto out_return_state
;
478 atomic_inc(&state
->count
);
482 static struct nfs4_state
*nfs4_opendata_to_nfs4_state(struct nfs4_opendata
*data
)
485 struct nfs4_state
*state
= NULL
;
486 struct nfs_delegation
*delegation
;
487 nfs4_stateid
*deleg_stateid
= NULL
;
490 if (!data
->rpc_done
) {
491 state
= nfs4_try_open_cached(data
);
496 if (!(data
->f_attr
.valid
& NFS_ATTR_FATTR
))
498 inode
= nfs_fhget(data
->dir
->d_sb
, &data
->o_res
.fh
, &data
->f_attr
);
499 ret
= PTR_ERR(inode
);
503 state
= nfs4_get_open_state(inode
, data
->owner
);
506 if (data
->o_res
.delegation_type
!= 0) {
507 int delegation_flags
= 0;
510 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
512 delegation_flags
= delegation
->flags
;
514 if (!(delegation_flags
& NFS_DELEGATION_NEED_RECLAIM
))
515 nfs_inode_set_delegation(state
->inode
,
516 data
->owner
->so_cred
,
519 nfs_inode_reclaim_delegation(state
->inode
,
520 data
->owner
->so_cred
,
524 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
525 if (delegation
!= NULL
)
526 deleg_stateid
= &delegation
->stateid
;
527 update_open_stateid(state
, &data
->o_res
.stateid
, deleg_stateid
, data
->o_arg
.open_flags
);
538 static struct nfs_open_context
*nfs4_state_find_open_context(struct nfs4_state
*state
)
540 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
541 struct nfs_open_context
*ctx
;
543 spin_lock(&state
->inode
->i_lock
);
544 list_for_each_entry(ctx
, &nfsi
->open_files
, list
) {
545 if (ctx
->state
!= state
)
547 get_nfs_open_context(ctx
);
548 spin_unlock(&state
->inode
->i_lock
);
551 spin_unlock(&state
->inode
->i_lock
);
552 return ERR_PTR(-ENOENT
);
555 static struct nfs4_opendata
*nfs4_open_recoverdata_alloc(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
557 struct nfs4_opendata
*opendata
;
559 opendata
= nfs4_opendata_alloc(&ctx
->path
, state
->owner
, 0, NULL
);
560 if (opendata
== NULL
)
561 return ERR_PTR(-ENOMEM
);
562 opendata
->state
= state
;
563 atomic_inc(&state
->count
);
567 static int nfs4_open_recover_helper(struct nfs4_opendata
*opendata
, mode_t openflags
, struct nfs4_state
**res
)
569 struct nfs4_state
*newstate
;
572 opendata
->o_arg
.open_flags
= openflags
;
573 memset(&opendata
->o_res
, 0, sizeof(opendata
->o_res
));
574 memset(&opendata
->c_res
, 0, sizeof(opendata
->c_res
));
575 nfs4_init_opendata_res(opendata
);
576 ret
= _nfs4_proc_open(opendata
);
579 newstate
= nfs4_opendata_to_nfs4_state(opendata
);
580 if (IS_ERR(newstate
))
581 return PTR_ERR(newstate
);
582 nfs4_close_state(&opendata
->path
, newstate
, openflags
);
587 static int nfs4_open_recover(struct nfs4_opendata
*opendata
, struct nfs4_state
*state
)
589 struct nfs4_state
*newstate
;
592 /* memory barrier prior to reading state->n_* */
593 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
595 if (state
->n_rdwr
!= 0) {
596 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
|FMODE_WRITE
, &newstate
);
599 if (newstate
!= state
)
602 if (state
->n_wronly
!= 0) {
603 ret
= nfs4_open_recover_helper(opendata
, FMODE_WRITE
, &newstate
);
606 if (newstate
!= state
)
609 if (state
->n_rdonly
!= 0) {
610 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
, &newstate
);
613 if (newstate
!= state
)
617 * We may have performed cached opens for all three recoveries.
618 * Check if we need to update the current stateid.
620 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0 &&
621 memcmp(state
->stateid
.data
, state
->open_stateid
.data
, sizeof(state
->stateid
.data
)) != 0) {
622 write_seqlock(&state
->seqlock
);
623 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0)
624 memcpy(state
->stateid
.data
, state
->open_stateid
.data
, sizeof(state
->stateid
.data
));
625 write_sequnlock(&state
->seqlock
);
632 * reclaim state on the server after a reboot.
634 static int _nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
636 struct nfs_delegation
*delegation
;
637 struct nfs4_opendata
*opendata
;
638 int delegation_type
= 0;
641 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
642 if (IS_ERR(opendata
))
643 return PTR_ERR(opendata
);
644 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_PREVIOUS
;
645 opendata
->o_arg
.fh
= NFS_FH(state
->inode
);
647 delegation
= rcu_dereference(NFS_I(state
->inode
)->delegation
);
648 if (delegation
!= NULL
&& (delegation
->flags
& NFS_DELEGATION_NEED_RECLAIM
) != 0)
649 delegation_type
= delegation
->flags
;
651 opendata
->o_arg
.u
.delegation_type
= delegation_type
;
652 status
= nfs4_open_recover(opendata
, state
);
653 nfs4_opendata_put(opendata
);
657 static int nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
659 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
660 struct nfs4_exception exception
= { };
663 err
= _nfs4_do_open_reclaim(ctx
, state
);
664 if (err
!= -NFS4ERR_DELAY
)
666 nfs4_handle_exception(server
, err
, &exception
);
667 } while (exception
.retry
);
671 static int nfs4_open_reclaim(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
673 struct nfs_open_context
*ctx
;
676 ctx
= nfs4_state_find_open_context(state
);
679 ret
= nfs4_do_open_reclaim(ctx
, state
);
680 put_nfs_open_context(ctx
);
684 static int _nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
686 struct nfs4_opendata
*opendata
;
689 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
690 if (IS_ERR(opendata
))
691 return PTR_ERR(opendata
);
692 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_DELEGATE_CUR
;
693 memcpy(opendata
->o_arg
.u
.delegation
.data
, stateid
->data
,
694 sizeof(opendata
->o_arg
.u
.delegation
.data
));
695 ret
= nfs4_open_recover(opendata
, state
);
696 nfs4_opendata_put(opendata
);
700 int nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
702 struct nfs4_exception exception
= { };
703 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
706 err
= _nfs4_open_delegation_recall(ctx
, state
, stateid
);
710 case -NFS4ERR_STALE_CLIENTID
:
711 case -NFS4ERR_STALE_STATEID
:
712 case -NFS4ERR_EXPIRED
:
713 /* Don't recall a delegation if it was lost */
714 nfs4_schedule_state_recovery(server
->nfs_client
);
717 err
= nfs4_handle_exception(server
, err
, &exception
);
718 } while (exception
.retry
);
722 static void nfs4_open_confirm_prepare(struct rpc_task
*task
, void *calldata
)
724 struct nfs4_opendata
*data
= calldata
;
725 struct rpc_message msg
= {
726 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_CONFIRM
],
727 .rpc_argp
= &data
->c_arg
,
728 .rpc_resp
= &data
->c_res
,
729 .rpc_cred
= data
->owner
->so_cred
,
731 data
->timestamp
= jiffies
;
732 rpc_call_setup(task
, &msg
, 0);
735 static void nfs4_open_confirm_done(struct rpc_task
*task
, void *calldata
)
737 struct nfs4_opendata
*data
= calldata
;
739 data
->rpc_status
= task
->tk_status
;
740 if (RPC_ASSASSINATED(task
))
742 if (data
->rpc_status
== 0) {
743 memcpy(data
->o_res
.stateid
.data
, data
->c_res
.stateid
.data
,
744 sizeof(data
->o_res
.stateid
.data
));
745 renew_lease(data
->o_res
.server
, data
->timestamp
);
748 nfs_confirm_seqid(&data
->owner
->so_seqid
, data
->rpc_status
);
749 nfs_increment_open_seqid(data
->rpc_status
, data
->c_arg
.seqid
);
752 static void nfs4_open_confirm_release(void *calldata
)
754 struct nfs4_opendata
*data
= calldata
;
755 struct nfs4_state
*state
= NULL
;
757 /* If this request hasn't been cancelled, do nothing */
758 if (data
->cancelled
== 0)
760 /* In case of error, no cleanup! */
763 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
764 state
= nfs4_opendata_to_nfs4_state(data
);
766 nfs4_close_state(&data
->path
, state
, data
->o_arg
.open_flags
);
768 nfs4_opendata_put(data
);
771 static const struct rpc_call_ops nfs4_open_confirm_ops
= {
772 .rpc_call_prepare
= nfs4_open_confirm_prepare
,
773 .rpc_call_done
= nfs4_open_confirm_done
,
774 .rpc_release
= nfs4_open_confirm_release
,
778 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
780 static int _nfs4_proc_open_confirm(struct nfs4_opendata
*data
)
782 struct nfs_server
*server
= NFS_SERVER(data
->dir
->d_inode
);
783 struct rpc_task
*task
;
786 kref_get(&data
->kref
);
788 data
->rpc_status
= 0;
789 task
= rpc_run_task(server
->client
, RPC_TASK_ASYNC
, &nfs4_open_confirm_ops
, data
);
791 return PTR_ERR(task
);
792 status
= nfs4_wait_for_completion_rpc_task(task
);
797 status
= data
->rpc_status
;
802 static void nfs4_open_prepare(struct rpc_task
*task
, void *calldata
)
804 struct nfs4_opendata
*data
= calldata
;
805 struct nfs4_state_owner
*sp
= data
->owner
;
806 struct rpc_message msg
= {
807 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN
],
808 .rpc_argp
= &data
->o_arg
,
809 .rpc_resp
= &data
->o_res
,
810 .rpc_cred
= sp
->so_cred
,
813 if (nfs_wait_on_sequence(data
->o_arg
.seqid
, task
) != 0)
816 * Check if we still need to send an OPEN call, or if we can use
817 * a delegation instead.
819 if (data
->state
!= NULL
) {
820 struct nfs_delegation
*delegation
;
822 if (can_open_cached(data
->state
, data
->o_arg
.open_flags
& (FMODE_READ
|FMODE_WRITE
|O_EXCL
)))
825 delegation
= rcu_dereference(NFS_I(data
->state
->inode
)->delegation
);
826 if (delegation
!= NULL
&&
827 (delegation
->flags
& NFS_DELEGATION_NEED_RECLAIM
) == 0) {
833 /* Update sequence id. */
834 data
->o_arg
.id
= sp
->so_owner_id
.id
;
835 data
->o_arg
.clientid
= sp
->so_client
->cl_clientid
;
836 if (data
->o_arg
.claim
== NFS4_OPEN_CLAIM_PREVIOUS
) {
837 msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_NOATTR
];
838 nfs_copy_fh(&data
->o_res
.fh
, data
->o_arg
.fh
);
840 data
->timestamp
= jiffies
;
841 rpc_call_setup(task
, &msg
, 0);
844 task
->tk_action
= NULL
;
848 static void nfs4_open_done(struct rpc_task
*task
, void *calldata
)
850 struct nfs4_opendata
*data
= calldata
;
852 data
->rpc_status
= task
->tk_status
;
853 if (RPC_ASSASSINATED(task
))
855 if (task
->tk_status
== 0) {
856 switch (data
->o_res
.f_attr
->mode
& S_IFMT
) {
860 data
->rpc_status
= -ELOOP
;
863 data
->rpc_status
= -EISDIR
;
866 data
->rpc_status
= -ENOTDIR
;
868 renew_lease(data
->o_res
.server
, data
->timestamp
);
869 if (!(data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
))
870 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
872 nfs_increment_open_seqid(data
->rpc_status
, data
->o_arg
.seqid
);
876 static void nfs4_open_release(void *calldata
)
878 struct nfs4_opendata
*data
= calldata
;
879 struct nfs4_state
*state
= NULL
;
881 /* If this request hasn't been cancelled, do nothing */
882 if (data
->cancelled
== 0)
884 /* In case of error, no cleanup! */
885 if (data
->rpc_status
!= 0 || !data
->rpc_done
)
887 /* In case we need an open_confirm, no cleanup! */
888 if (data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
)
890 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
891 state
= nfs4_opendata_to_nfs4_state(data
);
893 nfs4_close_state(&data
->path
, state
, data
->o_arg
.open_flags
);
895 nfs4_opendata_put(data
);
898 static const struct rpc_call_ops nfs4_open_ops
= {
899 .rpc_call_prepare
= nfs4_open_prepare
,
900 .rpc_call_done
= nfs4_open_done
,
901 .rpc_release
= nfs4_open_release
,
905 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
907 static int _nfs4_proc_open(struct nfs4_opendata
*data
)
909 struct inode
*dir
= data
->dir
->d_inode
;
910 struct nfs_server
*server
= NFS_SERVER(dir
);
911 struct nfs_openargs
*o_arg
= &data
->o_arg
;
912 struct nfs_openres
*o_res
= &data
->o_res
;
913 struct rpc_task
*task
;
916 kref_get(&data
->kref
);
918 data
->rpc_status
= 0;
920 task
= rpc_run_task(server
->client
, RPC_TASK_ASYNC
, &nfs4_open_ops
, data
);
922 return PTR_ERR(task
);
923 status
= nfs4_wait_for_completion_rpc_task(task
);
928 status
= data
->rpc_status
;
930 if (status
!= 0 || !data
->rpc_done
)
933 if (o_arg
->open_flags
& O_CREAT
) {
934 update_changeattr(dir
, &o_res
->cinfo
);
935 nfs_post_op_update_inode(dir
, o_res
->dir_attr
);
937 nfs_refresh_inode(dir
, o_res
->dir_attr
);
938 if(o_res
->rflags
& NFS4_OPEN_RESULT_CONFIRM
) {
939 status
= _nfs4_proc_open_confirm(data
);
943 if (!(o_res
->f_attr
->valid
& NFS_ATTR_FATTR
))
944 return server
->nfs_client
->rpc_ops
->getattr(server
, &o_res
->fh
, o_res
->f_attr
);
948 static int _nfs4_do_access(struct inode
*inode
, struct rpc_cred
*cred
, int openflags
)
950 struct nfs_access_entry cache
;
954 if (openflags
& FMODE_READ
)
956 if (openflags
& FMODE_WRITE
)
958 if (openflags
& FMODE_EXEC
)
960 status
= nfs_access_get_cached(inode
, cred
, &cache
);
964 /* Be clever: ask server to check for all possible rights */
965 cache
.mask
= MAY_EXEC
| MAY_WRITE
| MAY_READ
;
967 cache
.jiffies
= jiffies
;
968 status
= _nfs4_proc_access(inode
, &cache
);
971 nfs_access_add_cache(inode
, &cache
);
973 if ((cache
.mask
& mask
) == mask
)
978 static int nfs4_recover_expired_lease(struct nfs_server
*server
)
980 struct nfs_client
*clp
= server
->nfs_client
;
984 ret
= nfs4_wait_clnt_recover(server
->client
, clp
);
987 if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
))
989 nfs4_schedule_state_recovery(clp
);
996 * reclaim state on the server after a network partition.
997 * Assumes caller holds the appropriate lock
999 static int _nfs4_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1001 struct nfs4_opendata
*opendata
;
1004 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
1005 if (IS_ERR(opendata
))
1006 return PTR_ERR(opendata
);
1007 ret
= nfs4_open_recover(opendata
, state
);
1008 if (ret
== -ESTALE
) {
1009 /* Invalidate the state owner so we don't ever use it again */
1010 nfs4_drop_state_owner(state
->owner
);
1011 d_drop(ctx
->path
.dentry
);
1013 nfs4_opendata_put(opendata
);
1017 static inline int nfs4_do_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1019 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1020 struct nfs4_exception exception
= { };
1024 err
= _nfs4_open_expired(ctx
, state
);
1025 if (err
== -NFS4ERR_DELAY
)
1026 nfs4_handle_exception(server
, err
, &exception
);
1027 } while (exception
.retry
);
1031 static int nfs4_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
1033 struct nfs_open_context
*ctx
;
1036 ctx
= nfs4_state_find_open_context(state
);
1038 return PTR_ERR(ctx
);
1039 ret
= nfs4_do_open_expired(ctx
, state
);
1040 put_nfs_open_context(ctx
);
1045 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1046 * fields corresponding to attributes that were used to store the verifier.
1047 * Make sure we clobber those fields in the later setattr call
1049 static inline void nfs4_exclusive_attrset(struct nfs4_opendata
*opendata
, struct iattr
*sattr
)
1051 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_ACCESS
) &&
1052 !(sattr
->ia_valid
& ATTR_ATIME_SET
))
1053 sattr
->ia_valid
|= ATTR_ATIME
;
1055 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_MODIFY
) &&
1056 !(sattr
->ia_valid
& ATTR_MTIME_SET
))
1057 sattr
->ia_valid
|= ATTR_MTIME
;
1061 * Returns a referenced nfs4_state
1063 static int _nfs4_do_open(struct inode
*dir
, struct path
*path
, int flags
, struct iattr
*sattr
, struct rpc_cred
*cred
, struct nfs4_state
**res
)
1065 struct nfs4_state_owner
*sp
;
1066 struct nfs4_state
*state
= NULL
;
1067 struct nfs_server
*server
= NFS_SERVER(dir
);
1068 struct nfs_client
*clp
= server
->nfs_client
;
1069 struct nfs4_opendata
*opendata
;
1072 /* Protect against reboot recovery conflicts */
1074 if (!(sp
= nfs4_get_state_owner(server
, cred
))) {
1075 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1078 status
= nfs4_recover_expired_lease(server
);
1080 goto err_put_state_owner
;
1081 if (path
->dentry
->d_inode
!= NULL
)
1082 nfs4_return_incompatible_delegation(path
->dentry
->d_inode
, flags
& (FMODE_READ
|FMODE_WRITE
));
1083 down_read(&clp
->cl_sem
);
1085 opendata
= nfs4_opendata_alloc(path
, sp
, flags
, sattr
);
1086 if (opendata
== NULL
)
1087 goto err_release_rwsem
;
1089 if (path
->dentry
->d_inode
!= NULL
)
1090 opendata
->state
= nfs4_get_open_state(path
->dentry
->d_inode
, sp
);
1092 status
= _nfs4_proc_open(opendata
);
1094 goto err_opendata_put
;
1096 if (opendata
->o_arg
.open_flags
& O_EXCL
)
1097 nfs4_exclusive_attrset(opendata
, sattr
);
1099 state
= nfs4_opendata_to_nfs4_state(opendata
);
1100 status
= PTR_ERR(state
);
1102 goto err_opendata_put
;
1103 nfs4_opendata_put(opendata
);
1104 nfs4_put_state_owner(sp
);
1105 up_read(&clp
->cl_sem
);
1109 nfs4_opendata_put(opendata
);
1111 up_read(&clp
->cl_sem
);
1112 err_put_state_owner
:
1113 nfs4_put_state_owner(sp
);
1120 static struct nfs4_state
*nfs4_do_open(struct inode
*dir
, struct path
*path
, int flags
, struct iattr
*sattr
, struct rpc_cred
*cred
)
1122 struct nfs4_exception exception
= { };
1123 struct nfs4_state
*res
;
1127 status
= _nfs4_do_open(dir
, path
, flags
, sattr
, cred
, &res
);
1130 /* NOTE: BAD_SEQID means the server and client disagree about the
1131 * book-keeping w.r.t. state-changing operations
1132 * (OPEN/CLOSE/LOCK/LOCKU...)
1133 * It is actually a sign of a bug on the client or on the server.
1135 * If we receive a BAD_SEQID error in the particular case of
1136 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1137 * have unhashed the old state_owner for us, and that we can
1138 * therefore safely retry using a new one. We should still warn
1139 * the user though...
1141 if (status
== -NFS4ERR_BAD_SEQID
) {
1142 printk(KERN_WARNING
"NFS: v4 server %s "
1143 " returned a bad sequence-id error!\n",
1144 NFS_SERVER(dir
)->nfs_client
->cl_hostname
);
1145 exception
.retry
= 1;
1149 * BAD_STATEID on OPEN means that the server cancelled our
1150 * state before it received the OPEN_CONFIRM.
1151 * Recover by retrying the request as per the discussion
1152 * on Page 181 of RFC3530.
1154 if (status
== -NFS4ERR_BAD_STATEID
) {
1155 exception
.retry
= 1;
1158 if (status
== -EAGAIN
) {
1159 /* We must have found a delegation */
1160 exception
.retry
= 1;
1163 res
= ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir
),
1164 status
, &exception
));
1165 } while (exception
.retry
);
1169 static int _nfs4_do_setattr(struct inode
*inode
, struct nfs_fattr
*fattr
,
1170 struct iattr
*sattr
, struct nfs4_state
*state
)
1172 struct nfs_server
*server
= NFS_SERVER(inode
);
1173 struct nfs_setattrargs arg
= {
1174 .fh
= NFS_FH(inode
),
1177 .bitmask
= server
->attr_bitmask
,
1179 struct nfs_setattrres res
= {
1183 struct rpc_message msg
= {
1184 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETATTR
],
1188 unsigned long timestamp
= jiffies
;
1191 nfs_fattr_init(fattr
);
1193 if (nfs4_copy_delegation_stateid(&arg
.stateid
, inode
)) {
1194 /* Use that stateid */
1195 } else if (state
!= NULL
) {
1196 msg
.rpc_cred
= state
->owner
->so_cred
;
1197 nfs4_copy_stateid(&arg
.stateid
, state
, current
->files
);
1199 memcpy(&arg
.stateid
, &zero_stateid
, sizeof(arg
.stateid
));
1201 status
= rpc_call_sync(server
->client
, &msg
, 0);
1202 if (status
== 0 && state
!= NULL
)
1203 renew_lease(server
, timestamp
);
1207 static int nfs4_do_setattr(struct inode
*inode
, struct nfs_fattr
*fattr
,
1208 struct iattr
*sattr
, struct nfs4_state
*state
)
1210 struct nfs_server
*server
= NFS_SERVER(inode
);
1211 struct nfs4_exception exception
= { };
1214 err
= nfs4_handle_exception(server
,
1215 _nfs4_do_setattr(inode
, fattr
, sattr
, state
),
1217 } while (exception
.retry
);
1221 struct nfs4_closedata
{
1223 struct inode
*inode
;
1224 struct nfs4_state
*state
;
1225 struct nfs_closeargs arg
;
1226 struct nfs_closeres res
;
1227 struct nfs_fattr fattr
;
1228 unsigned long timestamp
;
1231 static void nfs4_free_closedata(void *data
)
1233 struct nfs4_closedata
*calldata
= data
;
1234 struct nfs4_state_owner
*sp
= calldata
->state
->owner
;
1236 nfs4_put_open_state(calldata
->state
);
1237 nfs_free_seqid(calldata
->arg
.seqid
);
1238 nfs4_put_state_owner(sp
);
1239 dput(calldata
->path
.dentry
);
1240 mntput(calldata
->path
.mnt
);
1244 static void nfs4_close_done(struct rpc_task
*task
, void *data
)
1246 struct nfs4_closedata
*calldata
= data
;
1247 struct nfs4_state
*state
= calldata
->state
;
1248 struct nfs_server
*server
= NFS_SERVER(calldata
->inode
);
1250 if (RPC_ASSASSINATED(task
))
1252 /* hmm. we are done with the inode, and in the process of freeing
1253 * the state_owner. we keep this around to process errors
1255 nfs_increment_open_seqid(task
->tk_status
, calldata
->arg
.seqid
);
1256 switch (task
->tk_status
) {
1258 nfs_set_open_stateid(state
, &calldata
->res
.stateid
, calldata
->arg
.open_flags
);
1259 renew_lease(server
, calldata
->timestamp
);
1261 case -NFS4ERR_STALE_STATEID
:
1262 case -NFS4ERR_EXPIRED
:
1265 if (nfs4_async_handle_error(task
, server
) == -EAGAIN
) {
1266 rpc_restart_call(task
);
1270 nfs_refresh_inode(calldata
->inode
, calldata
->res
.fattr
);
1273 static void nfs4_close_prepare(struct rpc_task
*task
, void *data
)
1275 struct nfs4_closedata
*calldata
= data
;
1276 struct nfs4_state
*state
= calldata
->state
;
1277 struct rpc_message msg
= {
1278 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CLOSE
],
1279 .rpc_argp
= &calldata
->arg
,
1280 .rpc_resp
= &calldata
->res
,
1281 .rpc_cred
= state
->owner
->so_cred
,
1283 int clear_rd
, clear_wr
, clear_rdwr
;
1286 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
1289 mode
= FMODE_READ
|FMODE_WRITE
;
1290 clear_rd
= clear_wr
= clear_rdwr
= 0;
1291 spin_lock(&state
->owner
->so_lock
);
1292 /* Calculate the change in open mode */
1293 if (state
->n_rdwr
== 0) {
1294 if (state
->n_rdonly
== 0) {
1295 mode
&= ~FMODE_READ
;
1296 clear_rd
|= test_and_clear_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
1297 clear_rdwr
|= test_and_clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1299 if (state
->n_wronly
== 0) {
1300 mode
&= ~FMODE_WRITE
;
1301 clear_wr
|= test_and_clear_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
1302 clear_rdwr
|= test_and_clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1305 spin_unlock(&state
->owner
->so_lock
);
1306 if (!clear_rd
&& !clear_wr
&& !clear_rdwr
) {
1307 /* Note: exit _without_ calling nfs4_close_done */
1308 task
->tk_action
= NULL
;
1311 nfs_fattr_init(calldata
->res
.fattr
);
1313 msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_DOWNGRADE
];
1314 calldata
->arg
.open_flags
= mode
;
1315 calldata
->timestamp
= jiffies
;
1316 rpc_call_setup(task
, &msg
, 0);
1319 static const struct rpc_call_ops nfs4_close_ops
= {
1320 .rpc_call_prepare
= nfs4_close_prepare
,
1321 .rpc_call_done
= nfs4_close_done
,
1322 .rpc_release
= nfs4_free_closedata
,
1326 * It is possible for data to be read/written from a mem-mapped file
1327 * after the sys_close call (which hits the vfs layer as a flush).
1328 * This means that we can't safely call nfsv4 close on a file until
1329 * the inode is cleared. This in turn means that we are not good
1330 * NFSv4 citizens - we do not indicate to the server to update the file's
1331 * share state even when we are done with one of the three share
1332 * stateid's in the inode.
1334 * NOTE: Caller must be holding the sp->so_owner semaphore!
1336 int nfs4_do_close(struct path
*path
, struct nfs4_state
*state
)
1338 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1339 struct nfs4_closedata
*calldata
;
1340 struct nfs4_state_owner
*sp
= state
->owner
;
1341 struct rpc_task
*task
;
1342 int status
= -ENOMEM
;
1344 calldata
= kmalloc(sizeof(*calldata
), GFP_KERNEL
);
1345 if (calldata
== NULL
)
1347 calldata
->inode
= state
->inode
;
1348 calldata
->state
= state
;
1349 calldata
->arg
.fh
= NFS_FH(state
->inode
);
1350 calldata
->arg
.stateid
= &state
->open_stateid
;
1351 /* Serialization for the sequence id */
1352 calldata
->arg
.seqid
= nfs_alloc_seqid(&state
->owner
->so_seqid
);
1353 if (calldata
->arg
.seqid
== NULL
)
1354 goto out_free_calldata
;
1355 calldata
->arg
.bitmask
= server
->attr_bitmask
;
1356 calldata
->res
.fattr
= &calldata
->fattr
;
1357 calldata
->res
.server
= server
;
1358 calldata
->path
.mnt
= mntget(path
->mnt
);
1359 calldata
->path
.dentry
= dget(path
->dentry
);
1361 task
= rpc_run_task(server
->client
, RPC_TASK_ASYNC
, &nfs4_close_ops
, calldata
);
1363 return PTR_ERR(task
);
1369 nfs4_put_open_state(state
);
1370 nfs4_put_state_owner(sp
);
1374 static int nfs4_intent_set_file(struct nameidata
*nd
, struct path
*path
, struct nfs4_state
*state
)
1379 /* If the open_intent is for execute, we have an extra check to make */
1380 if (nd
->intent
.open
.flags
& FMODE_EXEC
) {
1381 ret
= _nfs4_do_access(state
->inode
,
1382 state
->owner
->so_cred
,
1383 nd
->intent
.open
.flags
);
1387 filp
= lookup_instantiate_filp(nd
, path
->dentry
, NULL
);
1388 if (!IS_ERR(filp
)) {
1389 struct nfs_open_context
*ctx
;
1390 ctx
= (struct nfs_open_context
*)filp
->private_data
;
1394 ret
= PTR_ERR(filp
);
1396 nfs4_close_state(path
, state
, nd
->intent
.open
.flags
);
1401 nfs4_atomic_open(struct inode
*dir
, struct dentry
*dentry
, struct nameidata
*nd
)
1403 struct path path
= {
1408 struct rpc_cred
*cred
;
1409 struct nfs4_state
*state
;
1412 if (nd
->flags
& LOOKUP_CREATE
) {
1413 attr
.ia_mode
= nd
->intent
.open
.create_mode
;
1414 attr
.ia_valid
= ATTR_MODE
;
1415 if (!IS_POSIXACL(dir
))
1416 attr
.ia_mode
&= ~current
->fs
->umask
;
1419 BUG_ON(nd
->intent
.open
.flags
& O_CREAT
);
1422 cred
= rpcauth_lookupcred(NFS_CLIENT(dir
)->cl_auth
, 0);
1424 return (struct dentry
*)cred
;
1425 state
= nfs4_do_open(dir
, &path
, nd
->intent
.open
.flags
, &attr
, cred
);
1427 if (IS_ERR(state
)) {
1428 if (PTR_ERR(state
) == -ENOENT
)
1429 d_add(dentry
, NULL
);
1430 return (struct dentry
*)state
;
1432 res
= d_add_unique(dentry
, igrab(state
->inode
));
1435 nfs4_intent_set_file(nd
, &path
, state
);
1440 nfs4_open_revalidate(struct inode
*dir
, struct dentry
*dentry
, int openflags
, struct nameidata
*nd
)
1442 struct path path
= {
1446 struct rpc_cred
*cred
;
1447 struct nfs4_state
*state
;
1449 cred
= rpcauth_lookupcred(NFS_CLIENT(dir
)->cl_auth
, 0);
1451 return PTR_ERR(cred
);
1452 state
= nfs4_do_open(dir
, &path
, openflags
, NULL
, cred
);
1454 if (IS_ERR(state
)) {
1455 switch (PTR_ERR(state
)) {
1461 lookup_instantiate_filp(nd
, (struct dentry
*)state
, NULL
);
1467 if (state
->inode
== dentry
->d_inode
) {
1468 nfs4_intent_set_file(nd
, &path
, state
);
1471 nfs4_close_state(&path
, state
, openflags
);
1478 static int _nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1480 struct nfs4_server_caps_res res
= {};
1481 struct rpc_message msg
= {
1482 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SERVER_CAPS
],
1483 .rpc_argp
= fhandle
,
1488 status
= rpc_call_sync(server
->client
, &msg
, 0);
1490 memcpy(server
->attr_bitmask
, res
.attr_bitmask
, sizeof(server
->attr_bitmask
));
1491 if (res
.attr_bitmask
[0] & FATTR4_WORD0_ACL
)
1492 server
->caps
|= NFS_CAP_ACLS
;
1493 if (res
.has_links
!= 0)
1494 server
->caps
|= NFS_CAP_HARDLINKS
;
1495 if (res
.has_symlinks
!= 0)
1496 server
->caps
|= NFS_CAP_SYMLINKS
;
1497 server
->acl_bitmask
= res
.acl_bitmask
;
1502 int nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1504 struct nfs4_exception exception
= { };
1507 err
= nfs4_handle_exception(server
,
1508 _nfs4_server_capabilities(server
, fhandle
),
1510 } while (exception
.retry
);
1514 static int _nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1515 struct nfs_fsinfo
*info
)
1517 struct nfs4_lookup_root_arg args
= {
1518 .bitmask
= nfs4_fattr_bitmap
,
1520 struct nfs4_lookup_res res
= {
1522 .fattr
= info
->fattr
,
1525 struct rpc_message msg
= {
1526 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP_ROOT
],
1530 nfs_fattr_init(info
->fattr
);
1531 return rpc_call_sync(server
->client
, &msg
, 0);
1534 static int nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1535 struct nfs_fsinfo
*info
)
1537 struct nfs4_exception exception
= { };
1540 err
= nfs4_handle_exception(server
,
1541 _nfs4_lookup_root(server
, fhandle
, info
),
1543 } while (exception
.retry
);
1548 * get the file handle for the "/" directory on the server
1550 static int nfs4_proc_get_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1551 struct nfs_fsinfo
*info
)
1555 status
= nfs4_lookup_root(server
, fhandle
, info
);
1557 status
= nfs4_server_capabilities(server
, fhandle
);
1559 status
= nfs4_do_fsinfo(server
, fhandle
, info
);
1560 return nfs4_map_errors(status
);
1564 * Get locations and (maybe) other attributes of a referral.
1565 * Note that we'll actually follow the referral later when
1566 * we detect fsid mismatch in inode revalidation
1568 static int nfs4_get_referral(struct inode
*dir
, struct qstr
*name
, struct nfs_fattr
*fattr
, struct nfs_fh
*fhandle
)
1570 int status
= -ENOMEM
;
1571 struct page
*page
= NULL
;
1572 struct nfs4_fs_locations
*locations
= NULL
;
1574 page
= alloc_page(GFP_KERNEL
);
1577 locations
= kmalloc(sizeof(struct nfs4_fs_locations
), GFP_KERNEL
);
1578 if (locations
== NULL
)
1581 status
= nfs4_proc_fs_locations(dir
, name
, locations
, page
);
1584 /* Make sure server returned a different fsid for the referral */
1585 if (nfs_fsid_equal(&NFS_SERVER(dir
)->fsid
, &locations
->fattr
.fsid
)) {
1586 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__
, name
->name
);
1591 memcpy(fattr
, &locations
->fattr
, sizeof(struct nfs_fattr
));
1592 fattr
->valid
|= NFS_ATTR_FATTR_V4_REFERRAL
;
1594 fattr
->mode
= S_IFDIR
;
1595 memset(fhandle
, 0, sizeof(struct nfs_fh
));
1604 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1606 struct nfs4_getattr_arg args
= {
1608 .bitmask
= server
->attr_bitmask
,
1610 struct nfs4_getattr_res res
= {
1614 struct rpc_message msg
= {
1615 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETATTR
],
1620 nfs_fattr_init(fattr
);
1621 return rpc_call_sync(server
->client
, &msg
, 0);
1624 static int nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1626 struct nfs4_exception exception
= { };
1629 err
= nfs4_handle_exception(server
,
1630 _nfs4_proc_getattr(server
, fhandle
, fattr
),
1632 } while (exception
.retry
);
1637 * The file is not closed if it is opened due to the a request to change
1638 * the size of the file. The open call will not be needed once the
1639 * VFS layer lookup-intents are implemented.
1641 * Close is called when the inode is destroyed.
1642 * If we haven't opened the file for O_WRONLY, we
1643 * need to in the size_change case to obtain a stateid.
1646 * Because OPEN is always done by name in nfsv4, it is
1647 * possible that we opened a different file by the same
1648 * name. We can recognize this race condition, but we
1649 * can't do anything about it besides returning an error.
1651 * This will be fixed with VFS changes (lookup-intent).
1654 nfs4_proc_setattr(struct dentry
*dentry
, struct nfs_fattr
*fattr
,
1655 struct iattr
*sattr
)
1657 struct rpc_cred
*cred
;
1658 struct inode
*inode
= dentry
->d_inode
;
1659 struct nfs_open_context
*ctx
;
1660 struct nfs4_state
*state
= NULL
;
1663 nfs_fattr_init(fattr
);
1665 cred
= rpcauth_lookupcred(NFS_CLIENT(inode
)->cl_auth
, 0);
1667 return PTR_ERR(cred
);
1669 /* Search for an existing open(O_WRITE) file */
1670 ctx
= nfs_find_open_context(inode
, cred
, FMODE_WRITE
);
1674 status
= nfs4_do_setattr(inode
, fattr
, sattr
, state
);
1676 nfs_setattr_update_inode(inode
, sattr
);
1678 put_nfs_open_context(ctx
);
1683 static int _nfs4_proc_lookupfh(struct nfs_server
*server
, struct nfs_fh
*dirfh
,
1684 struct qstr
*name
, struct nfs_fh
*fhandle
,
1685 struct nfs_fattr
*fattr
)
1688 struct nfs4_lookup_arg args
= {
1689 .bitmask
= server
->attr_bitmask
,
1693 struct nfs4_lookup_res res
= {
1698 struct rpc_message msg
= {
1699 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP
],
1704 nfs_fattr_init(fattr
);
1706 dprintk("NFS call lookupfh %s\n", name
->name
);
1707 status
= rpc_call_sync(server
->client
, &msg
, 0);
1708 dprintk("NFS reply lookupfh: %d\n", status
);
1712 static int nfs4_proc_lookupfh(struct nfs_server
*server
, struct nfs_fh
*dirfh
,
1713 struct qstr
*name
, struct nfs_fh
*fhandle
,
1714 struct nfs_fattr
*fattr
)
1716 struct nfs4_exception exception
= { };
1719 err
= _nfs4_proc_lookupfh(server
, dirfh
, name
, fhandle
, fattr
);
1721 if (err
== -NFS4ERR_MOVED
) {
1725 err
= nfs4_handle_exception(server
, err
, &exception
);
1726 } while (exception
.retry
);
1730 static int _nfs4_proc_lookup(struct inode
*dir
, struct qstr
*name
,
1731 struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1735 dprintk("NFS call lookup %s\n", name
->name
);
1736 status
= _nfs4_proc_lookupfh(NFS_SERVER(dir
), NFS_FH(dir
), name
, fhandle
, fattr
);
1737 if (status
== -NFS4ERR_MOVED
)
1738 status
= nfs4_get_referral(dir
, name
, fattr
, fhandle
);
1739 dprintk("NFS reply lookup: %d\n", status
);
1743 static int nfs4_proc_lookup(struct inode
*dir
, struct qstr
*name
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1745 struct nfs4_exception exception
= { };
1748 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1749 _nfs4_proc_lookup(dir
, name
, fhandle
, fattr
),
1751 } while (exception
.retry
);
1755 static int _nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
1757 struct nfs4_accessargs args
= {
1758 .fh
= NFS_FH(inode
),
1760 struct nfs4_accessres res
= { 0 };
1761 struct rpc_message msg
= {
1762 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_ACCESS
],
1765 .rpc_cred
= entry
->cred
,
1767 int mode
= entry
->mask
;
1771 * Determine which access bits we want to ask for...
1773 if (mode
& MAY_READ
)
1774 args
.access
|= NFS4_ACCESS_READ
;
1775 if (S_ISDIR(inode
->i_mode
)) {
1776 if (mode
& MAY_WRITE
)
1777 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
;
1778 if (mode
& MAY_EXEC
)
1779 args
.access
|= NFS4_ACCESS_LOOKUP
;
1781 if (mode
& MAY_WRITE
)
1782 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
;
1783 if (mode
& MAY_EXEC
)
1784 args
.access
|= NFS4_ACCESS_EXECUTE
;
1786 status
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
1789 if (res
.access
& NFS4_ACCESS_READ
)
1790 entry
->mask
|= MAY_READ
;
1791 if (res
.access
& (NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
))
1792 entry
->mask
|= MAY_WRITE
;
1793 if (res
.access
& (NFS4_ACCESS_LOOKUP
|NFS4_ACCESS_EXECUTE
))
1794 entry
->mask
|= MAY_EXEC
;
1799 static int nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
1801 struct nfs4_exception exception
= { };
1804 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1805 _nfs4_proc_access(inode
, entry
),
1807 } while (exception
.retry
);
1812 * TODO: For the time being, we don't try to get any attributes
1813 * along with any of the zero-copy operations READ, READDIR,
1816 * In the case of the first three, we want to put the GETATTR
1817 * after the read-type operation -- this is because it is hard
1818 * to predict the length of a GETATTR response in v4, and thus
1819 * align the READ data correctly. This means that the GETATTR
1820 * may end up partially falling into the page cache, and we should
1821 * shift it into the 'tail' of the xdr_buf before processing.
1822 * To do this efficiently, we need to know the total length
1823 * of data received, which doesn't seem to be available outside
1826 * In the case of WRITE, we also want to put the GETATTR after
1827 * the operation -- in this case because we want to make sure
1828 * we get the post-operation mtime and size. This means that
1829 * we can't use xdr_encode_pages() as written: we need a variant
1830 * of it which would leave room in the 'tail' iovec.
1832 * Both of these changes to the XDR layer would in fact be quite
1833 * minor, but I decided to leave them for a subsequent patch.
1835 static int _nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
1836 unsigned int pgbase
, unsigned int pglen
)
1838 struct nfs4_readlink args
= {
1839 .fh
= NFS_FH(inode
),
1844 struct rpc_message msg
= {
1845 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READLINK
],
1850 return rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
1853 static int nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
1854 unsigned int pgbase
, unsigned int pglen
)
1856 struct nfs4_exception exception
= { };
1859 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1860 _nfs4_proc_readlink(inode
, page
, pgbase
, pglen
),
1862 } while (exception
.retry
);
1868 * We will need to arrange for the VFS layer to provide an atomic open.
1869 * Until then, this create/open method is prone to inefficiency and race
1870 * conditions due to the lookup, create, and open VFS calls from sys_open()
1871 * placed on the wire.
1873 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1874 * The file will be opened again in the subsequent VFS open call
1875 * (nfs4_proc_file_open).
1877 * The open for read will just hang around to be used by any process that
1878 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1882 nfs4_proc_create(struct inode
*dir
, struct dentry
*dentry
, struct iattr
*sattr
,
1883 int flags
, struct nameidata
*nd
)
1885 struct path path
= {
1889 struct nfs4_state
*state
;
1890 struct rpc_cred
*cred
;
1893 cred
= rpcauth_lookupcred(NFS_CLIENT(dir
)->cl_auth
, 0);
1895 status
= PTR_ERR(cred
);
1898 state
= nfs4_do_open(dir
, &path
, flags
, sattr
, cred
);
1900 if (IS_ERR(state
)) {
1901 status
= PTR_ERR(state
);
1904 d_instantiate(dentry
, igrab(state
->inode
));
1905 if (flags
& O_EXCL
) {
1906 struct nfs_fattr fattr
;
1907 status
= nfs4_do_setattr(state
->inode
, &fattr
, sattr
, state
);
1909 nfs_setattr_update_inode(state
->inode
, sattr
);
1910 nfs_post_op_update_inode(state
->inode
, &fattr
);
1912 if (status
== 0 && (nd
->flags
& LOOKUP_OPEN
) != 0)
1913 status
= nfs4_intent_set_file(nd
, &path
, state
);
1915 nfs4_close_state(&path
, state
, flags
);
1920 static int _nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
1922 struct nfs_server
*server
= NFS_SERVER(dir
);
1923 struct nfs4_remove_arg args
= {
1926 .bitmask
= server
->attr_bitmask
,
1928 struct nfs_fattr dir_attr
;
1929 struct nfs4_remove_res res
= {
1931 .dir_attr
= &dir_attr
,
1933 struct rpc_message msg
= {
1934 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
],
1940 nfs_fattr_init(res
.dir_attr
);
1941 status
= rpc_call_sync(server
->client
, &msg
, 0);
1943 update_changeattr(dir
, &res
.cinfo
);
1944 nfs_post_op_update_inode(dir
, res
.dir_attr
);
1949 static int nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
1951 struct nfs4_exception exception
= { };
1954 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1955 _nfs4_proc_remove(dir
, name
),
1957 } while (exception
.retry
);
1961 struct unlink_desc
{
1962 struct nfs4_remove_arg args
;
1963 struct nfs4_remove_res res
;
1964 struct nfs_fattr dir_attr
;
1967 static int nfs4_proc_unlink_setup(struct rpc_message
*msg
, struct dentry
*dir
,
1970 struct nfs_server
*server
= NFS_SERVER(dir
->d_inode
);
1971 struct unlink_desc
*up
;
1973 up
= kmalloc(sizeof(*up
), GFP_KERNEL
);
1977 up
->args
.fh
= NFS_FH(dir
->d_inode
);
1978 up
->args
.name
= name
;
1979 up
->args
.bitmask
= server
->attr_bitmask
;
1980 up
->res
.server
= server
;
1981 up
->res
.dir_attr
= &up
->dir_attr
;
1983 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
];
1984 msg
->rpc_argp
= &up
->args
;
1985 msg
->rpc_resp
= &up
->res
;
1989 static int nfs4_proc_unlink_done(struct dentry
*dir
, struct rpc_task
*task
)
1991 struct rpc_message
*msg
= &task
->tk_msg
;
1992 struct unlink_desc
*up
;
1994 if (msg
->rpc_resp
!= NULL
) {
1995 up
= container_of(msg
->rpc_resp
, struct unlink_desc
, res
);
1996 update_changeattr(dir
->d_inode
, &up
->res
.cinfo
);
1997 nfs_post_op_update_inode(dir
->d_inode
, up
->res
.dir_attr
);
1999 msg
->rpc_resp
= NULL
;
2000 msg
->rpc_argp
= NULL
;
2005 static int _nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2006 struct inode
*new_dir
, struct qstr
*new_name
)
2008 struct nfs_server
*server
= NFS_SERVER(old_dir
);
2009 struct nfs4_rename_arg arg
= {
2010 .old_dir
= NFS_FH(old_dir
),
2011 .new_dir
= NFS_FH(new_dir
),
2012 .old_name
= old_name
,
2013 .new_name
= new_name
,
2014 .bitmask
= server
->attr_bitmask
,
2016 struct nfs_fattr old_fattr
, new_fattr
;
2017 struct nfs4_rename_res res
= {
2019 .old_fattr
= &old_fattr
,
2020 .new_fattr
= &new_fattr
,
2022 struct rpc_message msg
= {
2023 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENAME
],
2029 nfs_fattr_init(res
.old_fattr
);
2030 nfs_fattr_init(res
.new_fattr
);
2031 status
= rpc_call_sync(server
->client
, &msg
, 0);
2034 update_changeattr(old_dir
, &res
.old_cinfo
);
2035 nfs_post_op_update_inode(old_dir
, res
.old_fattr
);
2036 update_changeattr(new_dir
, &res
.new_cinfo
);
2037 nfs_post_op_update_inode(new_dir
, res
.new_fattr
);
2042 static int nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2043 struct inode
*new_dir
, struct qstr
*new_name
)
2045 struct nfs4_exception exception
= { };
2048 err
= nfs4_handle_exception(NFS_SERVER(old_dir
),
2049 _nfs4_proc_rename(old_dir
, old_name
,
2052 } while (exception
.retry
);
2056 static int _nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2058 struct nfs_server
*server
= NFS_SERVER(inode
);
2059 struct nfs4_link_arg arg
= {
2060 .fh
= NFS_FH(inode
),
2061 .dir_fh
= NFS_FH(dir
),
2063 .bitmask
= server
->attr_bitmask
,
2065 struct nfs_fattr fattr
, dir_attr
;
2066 struct nfs4_link_res res
= {
2069 .dir_attr
= &dir_attr
,
2071 struct rpc_message msg
= {
2072 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LINK
],
2078 nfs_fattr_init(res
.fattr
);
2079 nfs_fattr_init(res
.dir_attr
);
2080 status
= rpc_call_sync(server
->client
, &msg
, 0);
2082 update_changeattr(dir
, &res
.cinfo
);
2083 nfs_post_op_update_inode(dir
, res
.dir_attr
);
2084 nfs_post_op_update_inode(inode
, res
.fattr
);
2090 static int nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2092 struct nfs4_exception exception
= { };
2095 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2096 _nfs4_proc_link(inode
, dir
, name
),
2098 } while (exception
.retry
);
2102 static int _nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2103 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2105 struct nfs_server
*server
= NFS_SERVER(dir
);
2106 struct nfs_fh fhandle
;
2107 struct nfs_fattr fattr
, dir_fattr
;
2108 struct nfs4_create_arg arg
= {
2109 .dir_fh
= NFS_FH(dir
),
2111 .name
= &dentry
->d_name
,
2114 .bitmask
= server
->attr_bitmask
,
2116 struct nfs4_create_res res
= {
2120 .dir_fattr
= &dir_fattr
,
2122 struct rpc_message msg
= {
2123 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SYMLINK
],
2129 if (len
> NFS4_MAXPATHLEN
)
2130 return -ENAMETOOLONG
;
2132 arg
.u
.symlink
.pages
= &page
;
2133 arg
.u
.symlink
.len
= len
;
2134 nfs_fattr_init(&fattr
);
2135 nfs_fattr_init(&dir_fattr
);
2137 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
2139 update_changeattr(dir
, &res
.dir_cinfo
);
2140 nfs_post_op_update_inode(dir
, res
.dir_fattr
);
2141 status
= nfs_instantiate(dentry
, &fhandle
, &fattr
);
2146 static int nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2147 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2149 struct nfs4_exception exception
= { };
2152 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2153 _nfs4_proc_symlink(dir
, dentry
, page
,
2156 } while (exception
.retry
);
2160 static int _nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2161 struct iattr
*sattr
)
2163 struct nfs_server
*server
= NFS_SERVER(dir
);
2164 struct nfs_fh fhandle
;
2165 struct nfs_fattr fattr
, dir_fattr
;
2166 struct nfs4_create_arg arg
= {
2167 .dir_fh
= NFS_FH(dir
),
2169 .name
= &dentry
->d_name
,
2172 .bitmask
= server
->attr_bitmask
,
2174 struct nfs4_create_res res
= {
2178 .dir_fattr
= &dir_fattr
,
2180 struct rpc_message msg
= {
2181 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
],
2187 nfs_fattr_init(&fattr
);
2188 nfs_fattr_init(&dir_fattr
);
2190 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
2192 update_changeattr(dir
, &res
.dir_cinfo
);
2193 nfs_post_op_update_inode(dir
, res
.dir_fattr
);
2194 status
= nfs_instantiate(dentry
, &fhandle
, &fattr
);
2199 static int nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2200 struct iattr
*sattr
)
2202 struct nfs4_exception exception
= { };
2205 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2206 _nfs4_proc_mkdir(dir
, dentry
, sattr
),
2208 } while (exception
.retry
);
2212 static int _nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2213 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2215 struct inode
*dir
= dentry
->d_inode
;
2216 struct nfs4_readdir_arg args
= {
2221 .bitmask
= NFS_SERVER(dentry
->d_inode
)->attr_bitmask
,
2223 struct nfs4_readdir_res res
;
2224 struct rpc_message msg
= {
2225 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READDIR
],
2232 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__
,
2233 dentry
->d_parent
->d_name
.name
,
2234 dentry
->d_name
.name
,
2235 (unsigned long long)cookie
);
2236 nfs4_setup_readdir(cookie
, NFS_COOKIEVERF(dir
), dentry
, &args
);
2237 res
.pgbase
= args
.pgbase
;
2238 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
2240 memcpy(NFS_COOKIEVERF(dir
), res
.verifier
.data
, NFS4_VERIFIER_SIZE
);
2241 dprintk("%s: returns %d\n", __FUNCTION__
, status
);
2245 static int nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2246 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2248 struct nfs4_exception exception
= { };
2251 err
= nfs4_handle_exception(NFS_SERVER(dentry
->d_inode
),
2252 _nfs4_proc_readdir(dentry
, cred
, cookie
,
2255 } while (exception
.retry
);
2259 static int _nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2260 struct iattr
*sattr
, dev_t rdev
)
2262 struct nfs_server
*server
= NFS_SERVER(dir
);
2264 struct nfs_fattr fattr
, dir_fattr
;
2265 struct nfs4_create_arg arg
= {
2266 .dir_fh
= NFS_FH(dir
),
2268 .name
= &dentry
->d_name
,
2270 .bitmask
= server
->attr_bitmask
,
2272 struct nfs4_create_res res
= {
2276 .dir_fattr
= &dir_fattr
,
2278 struct rpc_message msg
= {
2279 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
],
2284 int mode
= sattr
->ia_mode
;
2286 nfs_fattr_init(&fattr
);
2287 nfs_fattr_init(&dir_fattr
);
2289 BUG_ON(!(sattr
->ia_valid
& ATTR_MODE
));
2290 BUG_ON(!S_ISFIFO(mode
) && !S_ISBLK(mode
) && !S_ISCHR(mode
) && !S_ISSOCK(mode
));
2292 arg
.ftype
= NF4FIFO
;
2293 else if (S_ISBLK(mode
)) {
2295 arg
.u
.device
.specdata1
= MAJOR(rdev
);
2296 arg
.u
.device
.specdata2
= MINOR(rdev
);
2298 else if (S_ISCHR(mode
)) {
2300 arg
.u
.device
.specdata1
= MAJOR(rdev
);
2301 arg
.u
.device
.specdata2
= MINOR(rdev
);
2304 arg
.ftype
= NF4SOCK
;
2306 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
2308 update_changeattr(dir
, &res
.dir_cinfo
);
2309 nfs_post_op_update_inode(dir
, res
.dir_fattr
);
2310 status
= nfs_instantiate(dentry
, &fh
, &fattr
);
2315 static int nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2316 struct iattr
*sattr
, dev_t rdev
)
2318 struct nfs4_exception exception
= { };
2321 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2322 _nfs4_proc_mknod(dir
, dentry
, sattr
, rdev
),
2324 } while (exception
.retry
);
2328 static int _nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2329 struct nfs_fsstat
*fsstat
)
2331 struct nfs4_statfs_arg args
= {
2333 .bitmask
= server
->attr_bitmask
,
2335 struct rpc_message msg
= {
2336 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_STATFS
],
2341 nfs_fattr_init(fsstat
->fattr
);
2342 return rpc_call_sync(server
->client
, &msg
, 0);
2345 static int nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsstat
*fsstat
)
2347 struct nfs4_exception exception
= { };
2350 err
= nfs4_handle_exception(server
,
2351 _nfs4_proc_statfs(server
, fhandle
, fsstat
),
2353 } while (exception
.retry
);
2357 static int _nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2358 struct nfs_fsinfo
*fsinfo
)
2360 struct nfs4_fsinfo_arg args
= {
2362 .bitmask
= server
->attr_bitmask
,
2364 struct rpc_message msg
= {
2365 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FSINFO
],
2370 return rpc_call_sync(server
->client
, &msg
, 0);
2373 static int nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2375 struct nfs4_exception exception
= { };
2379 err
= nfs4_handle_exception(server
,
2380 _nfs4_do_fsinfo(server
, fhandle
, fsinfo
),
2382 } while (exception
.retry
);
2386 static int nfs4_proc_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2388 nfs_fattr_init(fsinfo
->fattr
);
2389 return nfs4_do_fsinfo(server
, fhandle
, fsinfo
);
2392 static int _nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2393 struct nfs_pathconf
*pathconf
)
2395 struct nfs4_pathconf_arg args
= {
2397 .bitmask
= server
->attr_bitmask
,
2399 struct rpc_message msg
= {
2400 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_PATHCONF
],
2402 .rpc_resp
= pathconf
,
2405 /* None of the pathconf attributes are mandatory to implement */
2406 if ((args
.bitmask
[0] & nfs4_pathconf_bitmap
[0]) == 0) {
2407 memset(pathconf
, 0, sizeof(*pathconf
));
2411 nfs_fattr_init(pathconf
->fattr
);
2412 return rpc_call_sync(server
->client
, &msg
, 0);
2415 static int nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2416 struct nfs_pathconf
*pathconf
)
2418 struct nfs4_exception exception
= { };
2422 err
= nfs4_handle_exception(server
,
2423 _nfs4_proc_pathconf(server
, fhandle
, pathconf
),
2425 } while (exception
.retry
);
2429 static int nfs4_read_done(struct rpc_task
*task
, struct nfs_read_data
*data
)
2431 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2433 if (nfs4_async_handle_error(task
, server
) == -EAGAIN
) {
2434 rpc_restart_call(task
);
2437 if (task
->tk_status
> 0)
2438 renew_lease(server
, data
->timestamp
);
2442 static void nfs4_proc_read_setup(struct nfs_read_data
*data
)
2444 struct rpc_message msg
= {
2445 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READ
],
2446 .rpc_argp
= &data
->args
,
2447 .rpc_resp
= &data
->res
,
2448 .rpc_cred
= data
->cred
,
2451 data
->timestamp
= jiffies
;
2453 rpc_call_setup(&data
->task
, &msg
, 0);
2456 static int nfs4_write_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
2458 struct inode
*inode
= data
->inode
;
2460 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
)) == -EAGAIN
) {
2461 rpc_restart_call(task
);
2464 if (task
->tk_status
>= 0) {
2465 renew_lease(NFS_SERVER(inode
), data
->timestamp
);
2466 nfs_post_op_update_inode(inode
, data
->res
.fattr
);
2471 static void nfs4_proc_write_setup(struct nfs_write_data
*data
, int how
)
2473 struct rpc_message msg
= {
2474 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_WRITE
],
2475 .rpc_argp
= &data
->args
,
2476 .rpc_resp
= &data
->res
,
2477 .rpc_cred
= data
->cred
,
2479 struct inode
*inode
= data
->inode
;
2480 struct nfs_server
*server
= NFS_SERVER(inode
);
2483 if (how
& FLUSH_STABLE
) {
2484 if (!NFS_I(inode
)->ncommit
)
2485 stable
= NFS_FILE_SYNC
;
2487 stable
= NFS_DATA_SYNC
;
2489 stable
= NFS_UNSTABLE
;
2490 data
->args
.stable
= stable
;
2491 data
->args
.bitmask
= server
->attr_bitmask
;
2492 data
->res
.server
= server
;
2494 data
->timestamp
= jiffies
;
2496 /* Finalize the task. */
2497 rpc_call_setup(&data
->task
, &msg
, 0);
2500 static int nfs4_commit_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
2502 struct inode
*inode
= data
->inode
;
2504 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
)) == -EAGAIN
) {
2505 rpc_restart_call(task
);
2508 if (task
->tk_status
>= 0)
2509 nfs_post_op_update_inode(inode
, data
->res
.fattr
);
2513 static void nfs4_proc_commit_setup(struct nfs_write_data
*data
, int how
)
2515 struct rpc_message msg
= {
2516 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_COMMIT
],
2517 .rpc_argp
= &data
->args
,
2518 .rpc_resp
= &data
->res
,
2519 .rpc_cred
= data
->cred
,
2521 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2523 data
->args
.bitmask
= server
->attr_bitmask
;
2524 data
->res
.server
= server
;
2526 rpc_call_setup(&data
->task
, &msg
, 0);
2530 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2531 * standalone procedure for queueing an asynchronous RENEW.
2533 static void nfs4_renew_done(struct rpc_task
*task
, void *data
)
2535 struct nfs_client
*clp
= (struct nfs_client
*)task
->tk_msg
.rpc_argp
;
2536 unsigned long timestamp
= (unsigned long)data
;
2538 if (task
->tk_status
< 0) {
2539 switch (task
->tk_status
) {
2540 case -NFS4ERR_STALE_CLIENTID
:
2541 case -NFS4ERR_EXPIRED
:
2542 case -NFS4ERR_CB_PATH_DOWN
:
2543 nfs4_schedule_state_recovery(clp
);
2547 spin_lock(&clp
->cl_lock
);
2548 if (time_before(clp
->cl_last_renewal
,timestamp
))
2549 clp
->cl_last_renewal
= timestamp
;
2550 spin_unlock(&clp
->cl_lock
);
2553 static const struct rpc_call_ops nfs4_renew_ops
= {
2554 .rpc_call_done
= nfs4_renew_done
,
2557 int nfs4_proc_async_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2559 struct rpc_message msg
= {
2560 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2565 return rpc_call_async(clp
->cl_rpcclient
, &msg
, RPC_TASK_SOFT
,
2566 &nfs4_renew_ops
, (void *)jiffies
);
2569 int nfs4_proc_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2571 struct rpc_message msg
= {
2572 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2576 unsigned long now
= jiffies
;
2579 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2582 spin_lock(&clp
->cl_lock
);
2583 if (time_before(clp
->cl_last_renewal
,now
))
2584 clp
->cl_last_renewal
= now
;
2585 spin_unlock(&clp
->cl_lock
);
2589 static inline int nfs4_server_supports_acls(struct nfs_server
*server
)
2591 return (server
->caps
& NFS_CAP_ACLS
)
2592 && (server
->acl_bitmask
& ACL4_SUPPORT_ALLOW_ACL
)
2593 && (server
->acl_bitmask
& ACL4_SUPPORT_DENY_ACL
);
2596 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2597 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2600 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2602 static void buf_to_pages(const void *buf
, size_t buflen
,
2603 struct page
**pages
, unsigned int *pgbase
)
2605 const void *p
= buf
;
2607 *pgbase
= offset_in_page(buf
);
2609 while (p
< buf
+ buflen
) {
2610 *(pages
++) = virt_to_page(p
);
2611 p
+= PAGE_CACHE_SIZE
;
2615 struct nfs4_cached_acl
{
2621 static void nfs4_set_cached_acl(struct inode
*inode
, struct nfs4_cached_acl
*acl
)
2623 struct nfs_inode
*nfsi
= NFS_I(inode
);
2625 spin_lock(&inode
->i_lock
);
2626 kfree(nfsi
->nfs4_acl
);
2627 nfsi
->nfs4_acl
= acl
;
2628 spin_unlock(&inode
->i_lock
);
2631 static void nfs4_zap_acl_attr(struct inode
*inode
)
2633 nfs4_set_cached_acl(inode
, NULL
);
2636 static inline ssize_t
nfs4_read_cached_acl(struct inode
*inode
, char *buf
, size_t buflen
)
2638 struct nfs_inode
*nfsi
= NFS_I(inode
);
2639 struct nfs4_cached_acl
*acl
;
2642 spin_lock(&inode
->i_lock
);
2643 acl
= nfsi
->nfs4_acl
;
2646 if (buf
== NULL
) /* user is just asking for length */
2648 if (acl
->cached
== 0)
2650 ret
= -ERANGE
; /* see getxattr(2) man page */
2651 if (acl
->len
> buflen
)
2653 memcpy(buf
, acl
->data
, acl
->len
);
2657 spin_unlock(&inode
->i_lock
);
2661 static void nfs4_write_cached_acl(struct inode
*inode
, const char *buf
, size_t acl_len
)
2663 struct nfs4_cached_acl
*acl
;
2665 if (buf
&& acl_len
<= PAGE_SIZE
) {
2666 acl
= kmalloc(sizeof(*acl
) + acl_len
, GFP_KERNEL
);
2670 memcpy(acl
->data
, buf
, acl_len
);
2672 acl
= kmalloc(sizeof(*acl
), GFP_KERNEL
);
2679 nfs4_set_cached_acl(inode
, acl
);
2682 static ssize_t
__nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
2684 struct page
*pages
[NFS4ACL_MAXPAGES
];
2685 struct nfs_getaclargs args
= {
2686 .fh
= NFS_FH(inode
),
2690 size_t resp_len
= buflen
;
2692 struct rpc_message msg
= {
2693 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETACL
],
2695 .rpc_resp
= &resp_len
,
2697 struct page
*localpage
= NULL
;
2700 if (buflen
< PAGE_SIZE
) {
2701 /* As long as we're doing a round trip to the server anyway,
2702 * let's be prepared for a page of acl data. */
2703 localpage
= alloc_page(GFP_KERNEL
);
2704 resp_buf
= page_address(localpage
);
2705 if (localpage
== NULL
)
2707 args
.acl_pages
[0] = localpage
;
2708 args
.acl_pgbase
= 0;
2709 resp_len
= args
.acl_len
= PAGE_SIZE
;
2712 buf_to_pages(buf
, buflen
, args
.acl_pages
, &args
.acl_pgbase
);
2714 ret
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
2717 if (resp_len
> args
.acl_len
)
2718 nfs4_write_cached_acl(inode
, NULL
, resp_len
);
2720 nfs4_write_cached_acl(inode
, resp_buf
, resp_len
);
2723 if (resp_len
> buflen
)
2726 memcpy(buf
, resp_buf
, resp_len
);
2731 __free_page(localpage
);
2735 static ssize_t
nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
2737 struct nfs4_exception exception
= { };
2740 ret
= __nfs4_get_acl_uncached(inode
, buf
, buflen
);
2743 ret
= nfs4_handle_exception(NFS_SERVER(inode
), ret
, &exception
);
2744 } while (exception
.retry
);
2748 static ssize_t
nfs4_proc_get_acl(struct inode
*inode
, void *buf
, size_t buflen
)
2750 struct nfs_server
*server
= NFS_SERVER(inode
);
2753 if (!nfs4_server_supports_acls(server
))
2755 ret
= nfs_revalidate_inode(server
, inode
);
2758 ret
= nfs4_read_cached_acl(inode
, buf
, buflen
);
2761 return nfs4_get_acl_uncached(inode
, buf
, buflen
);
2764 static int __nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
2766 struct nfs_server
*server
= NFS_SERVER(inode
);
2767 struct page
*pages
[NFS4ACL_MAXPAGES
];
2768 struct nfs_setaclargs arg
= {
2769 .fh
= NFS_FH(inode
),
2773 struct rpc_message msg
= {
2774 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETACL
],
2780 if (!nfs4_server_supports_acls(server
))
2782 nfs_inode_return_delegation(inode
);
2783 buf_to_pages(buf
, buflen
, arg
.acl_pages
, &arg
.acl_pgbase
);
2784 ret
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
2785 nfs_zap_caches(inode
);
2789 static int nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
2791 struct nfs4_exception exception
= { };
2794 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2795 __nfs4_proc_set_acl(inode
, buf
, buflen
),
2797 } while (exception
.retry
);
2802 nfs4_async_handle_error(struct rpc_task
*task
, const struct nfs_server
*server
)
2804 struct nfs_client
*clp
= server
->nfs_client
;
2806 if (!clp
|| task
->tk_status
>= 0)
2808 switch(task
->tk_status
) {
2809 case -NFS4ERR_STALE_CLIENTID
:
2810 case -NFS4ERR_STALE_STATEID
:
2811 case -NFS4ERR_EXPIRED
:
2812 rpc_sleep_on(&clp
->cl_rpcwaitq
, task
, NULL
, NULL
);
2813 nfs4_schedule_state_recovery(clp
);
2814 if (test_bit(NFS4CLNT_STATE_RECOVER
, &clp
->cl_state
) == 0)
2815 rpc_wake_up_task(task
);
2816 task
->tk_status
= 0;
2818 case -NFS4ERR_DELAY
:
2819 nfs_inc_server_stats((struct nfs_server
*) server
,
2821 case -NFS4ERR_GRACE
:
2822 rpc_delay(task
, NFS4_POLL_RETRY_MAX
);
2823 task
->tk_status
= 0;
2825 case -NFS4ERR_OLD_STATEID
:
2826 task
->tk_status
= 0;
2829 task
->tk_status
= nfs4_map_errors(task
->tk_status
);
2833 static int nfs4_wait_bit_interruptible(void *word
)
2835 if (signal_pending(current
))
2836 return -ERESTARTSYS
;
2841 static int nfs4_wait_clnt_recover(struct rpc_clnt
*clnt
, struct nfs_client
*clp
)
2848 rwsem_acquire(&clp
->cl_sem
.dep_map
, 0, 0, _RET_IP_
);
2850 rpc_clnt_sigmask(clnt
, &oldset
);
2851 res
= wait_on_bit(&clp
->cl_state
, NFS4CLNT_STATE_RECOVER
,
2852 nfs4_wait_bit_interruptible
,
2853 TASK_INTERRUPTIBLE
);
2854 rpc_clnt_sigunmask(clnt
, &oldset
);
2856 rwsem_release(&clp
->cl_sem
.dep_map
, 1, _RET_IP_
);
2860 static int nfs4_delay(struct rpc_clnt
*clnt
, long *timeout
)
2868 *timeout
= NFS4_POLL_RETRY_MIN
;
2869 if (*timeout
> NFS4_POLL_RETRY_MAX
)
2870 *timeout
= NFS4_POLL_RETRY_MAX
;
2871 rpc_clnt_sigmask(clnt
, &oldset
);
2872 if (clnt
->cl_intr
) {
2873 schedule_timeout_interruptible(*timeout
);
2877 schedule_timeout_uninterruptible(*timeout
);
2878 rpc_clnt_sigunmask(clnt
, &oldset
);
2883 /* This is the error handling routine for processes that are allowed
2886 static int nfs4_handle_exception(const struct nfs_server
*server
, int errorcode
, struct nfs4_exception
*exception
)
2888 struct nfs_client
*clp
= server
->nfs_client
;
2889 int ret
= errorcode
;
2891 exception
->retry
= 0;
2895 case -NFS4ERR_STALE_CLIENTID
:
2896 case -NFS4ERR_STALE_STATEID
:
2897 case -NFS4ERR_EXPIRED
:
2898 nfs4_schedule_state_recovery(clp
);
2899 ret
= nfs4_wait_clnt_recover(server
->client
, clp
);
2901 exception
->retry
= 1;
2903 case -NFS4ERR_FILE_OPEN
:
2904 case -NFS4ERR_GRACE
:
2905 case -NFS4ERR_DELAY
:
2906 ret
= nfs4_delay(server
->client
, &exception
->timeout
);
2909 case -NFS4ERR_OLD_STATEID
:
2910 exception
->retry
= 1;
2912 /* We failed to handle the error */
2913 return nfs4_map_errors(ret
);
2916 int nfs4_proc_setclientid(struct nfs_client
*clp
, u32 program
, unsigned short port
, struct rpc_cred
*cred
)
2918 nfs4_verifier sc_verifier
;
2919 struct nfs4_setclientid setclientid
= {
2920 .sc_verifier
= &sc_verifier
,
2923 struct rpc_message msg
= {
2924 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID
],
2925 .rpc_argp
= &setclientid
,
2933 p
= (__be32
*)sc_verifier
.data
;
2934 *p
++ = htonl((u32
)clp
->cl_boot_time
.tv_sec
);
2935 *p
= htonl((u32
)clp
->cl_boot_time
.tv_nsec
);
2938 setclientid
.sc_name_len
= scnprintf(setclientid
.sc_name
,
2939 sizeof(setclientid
.sc_name
), "%s/%u.%u.%u.%u %s %u",
2940 clp
->cl_ipaddr
, NIPQUAD(clp
->cl_addr
.sin_addr
),
2941 cred
->cr_ops
->cr_name
,
2942 clp
->cl_id_uniquifier
);
2943 setclientid
.sc_netid_len
= scnprintf(setclientid
.sc_netid
,
2944 sizeof(setclientid
.sc_netid
), "tcp");
2945 setclientid
.sc_uaddr_len
= scnprintf(setclientid
.sc_uaddr
,
2946 sizeof(setclientid
.sc_uaddr
), "%s.%d.%d",
2947 clp
->cl_ipaddr
, port
>> 8, port
& 255);
2949 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2950 if (status
!= -NFS4ERR_CLID_INUSE
)
2955 ssleep(clp
->cl_lease_time
+ 1);
2957 if (++clp
->cl_id_uniquifier
== 0)
2963 static int _nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2965 struct nfs_fsinfo fsinfo
;
2966 struct rpc_message msg
= {
2967 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID_CONFIRM
],
2969 .rpc_resp
= &fsinfo
,
2976 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2978 spin_lock(&clp
->cl_lock
);
2979 clp
->cl_lease_time
= fsinfo
.lease_time
* HZ
;
2980 clp
->cl_last_renewal
= now
;
2981 clear_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
2982 spin_unlock(&clp
->cl_lock
);
2987 int nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2992 err
= _nfs4_proc_setclientid_confirm(clp
, cred
);
2996 case -NFS4ERR_RESOURCE
:
2997 /* The IBM lawyers misread another document! */
2998 case -NFS4ERR_DELAY
:
2999 err
= nfs4_delay(clp
->cl_rpcclient
, &timeout
);
3005 struct nfs4_delegreturndata
{
3006 struct nfs4_delegreturnargs args
;
3007 struct nfs4_delegreturnres res
;
3009 nfs4_stateid stateid
;
3010 struct rpc_cred
*cred
;
3011 unsigned long timestamp
;
3012 struct nfs_fattr fattr
;
3016 static void nfs4_delegreturn_prepare(struct rpc_task
*task
, void *calldata
)
3018 struct nfs4_delegreturndata
*data
= calldata
;
3019 struct rpc_message msg
= {
3020 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DELEGRETURN
],
3021 .rpc_argp
= &data
->args
,
3022 .rpc_resp
= &data
->res
,
3023 .rpc_cred
= data
->cred
,
3025 nfs_fattr_init(data
->res
.fattr
);
3026 rpc_call_setup(task
, &msg
, 0);
3029 static void nfs4_delegreturn_done(struct rpc_task
*task
, void *calldata
)
3031 struct nfs4_delegreturndata
*data
= calldata
;
3032 data
->rpc_status
= task
->tk_status
;
3033 if (data
->rpc_status
== 0)
3034 renew_lease(data
->res
.server
, data
->timestamp
);
3037 static void nfs4_delegreturn_release(void *calldata
)
3039 struct nfs4_delegreturndata
*data
= calldata
;
3041 put_rpccred(data
->cred
);
3045 static const struct rpc_call_ops nfs4_delegreturn_ops
= {
3046 .rpc_call_prepare
= nfs4_delegreturn_prepare
,
3047 .rpc_call_done
= nfs4_delegreturn_done
,
3048 .rpc_release
= nfs4_delegreturn_release
,
3051 static int _nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
)
3053 struct nfs4_delegreturndata
*data
;
3054 struct nfs_server
*server
= NFS_SERVER(inode
);
3055 struct rpc_task
*task
;
3058 data
= kmalloc(sizeof(*data
), GFP_KERNEL
);
3061 data
->args
.fhandle
= &data
->fh
;
3062 data
->args
.stateid
= &data
->stateid
;
3063 data
->args
.bitmask
= server
->attr_bitmask
;
3064 nfs_copy_fh(&data
->fh
, NFS_FH(inode
));
3065 memcpy(&data
->stateid
, stateid
, sizeof(data
->stateid
));
3066 data
->res
.fattr
= &data
->fattr
;
3067 data
->res
.server
= server
;
3068 data
->cred
= get_rpccred(cred
);
3069 data
->timestamp
= jiffies
;
3070 data
->rpc_status
= 0;
3072 task
= rpc_run_task(NFS_CLIENT(inode
), RPC_TASK_ASYNC
, &nfs4_delegreturn_ops
, data
);
3074 return PTR_ERR(task
);
3075 status
= nfs4_wait_for_completion_rpc_task(task
);
3077 status
= data
->rpc_status
;
3079 nfs_post_op_update_inode(inode
, &data
->fattr
);
3085 int nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
)
3087 struct nfs_server
*server
= NFS_SERVER(inode
);
3088 struct nfs4_exception exception
= { };
3091 err
= _nfs4_proc_delegreturn(inode
, cred
, stateid
);
3093 case -NFS4ERR_STALE_STATEID
:
3094 case -NFS4ERR_EXPIRED
:
3098 err
= nfs4_handle_exception(server
, err
, &exception
);
3099 } while (exception
.retry
);
3103 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3104 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3107 * sleep, with exponential backoff, and retry the LOCK operation.
3109 static unsigned long
3110 nfs4_set_lock_task_retry(unsigned long timeout
)
3112 schedule_timeout_interruptible(timeout
);
3114 if (timeout
> NFS4_LOCK_MAXTIMEOUT
)
3115 return NFS4_LOCK_MAXTIMEOUT
;
3119 static int _nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3121 struct inode
*inode
= state
->inode
;
3122 struct nfs_server
*server
= NFS_SERVER(inode
);
3123 struct nfs_client
*clp
= server
->nfs_client
;
3124 struct nfs_lockt_args arg
= {
3125 .fh
= NFS_FH(inode
),
3128 struct nfs_lockt_res res
= {
3131 struct rpc_message msg
= {
3132 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKT
],
3135 .rpc_cred
= state
->owner
->so_cred
,
3137 struct nfs4_lock_state
*lsp
;
3140 down_read(&clp
->cl_sem
);
3141 arg
.lock_owner
.clientid
= clp
->cl_clientid
;
3142 status
= nfs4_set_lock_state(state
, request
);
3145 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3146 arg
.lock_owner
.id
= lsp
->ls_id
.id
;
3147 status
= rpc_call_sync(server
->client
, &msg
, 0);
3150 request
->fl_type
= F_UNLCK
;
3152 case -NFS4ERR_DENIED
:
3155 request
->fl_ops
->fl_release_private(request
);
3157 up_read(&clp
->cl_sem
);
3161 static int nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3163 struct nfs4_exception exception
= { };
3167 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3168 _nfs4_proc_getlk(state
, cmd
, request
),
3170 } while (exception
.retry
);
3174 static int do_vfs_lock(struct file
*file
, struct file_lock
*fl
)
3177 switch (fl
->fl_flags
& (FL_POSIX
|FL_FLOCK
)) {
3179 res
= posix_lock_file_wait(file
, fl
);
3182 res
= flock_lock_file_wait(file
, fl
);
3190 struct nfs4_unlockdata
{
3191 struct nfs_locku_args arg
;
3192 struct nfs_locku_res res
;
3193 struct nfs4_lock_state
*lsp
;
3194 struct nfs_open_context
*ctx
;
3195 struct file_lock fl
;
3196 const struct nfs_server
*server
;
3197 unsigned long timestamp
;
3200 static struct nfs4_unlockdata
*nfs4_alloc_unlockdata(struct file_lock
*fl
,
3201 struct nfs_open_context
*ctx
,
3202 struct nfs4_lock_state
*lsp
,
3203 struct nfs_seqid
*seqid
)
3205 struct nfs4_unlockdata
*p
;
3206 struct inode
*inode
= lsp
->ls_state
->inode
;
3208 p
= kmalloc(sizeof(*p
), GFP_KERNEL
);
3211 p
->arg
.fh
= NFS_FH(inode
);
3213 p
->arg
.seqid
= seqid
;
3214 p
->arg
.stateid
= &lsp
->ls_stateid
;
3216 atomic_inc(&lsp
->ls_count
);
3217 /* Ensure we don't close file until we're done freeing locks! */
3218 p
->ctx
= get_nfs_open_context(ctx
);
3219 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3220 p
->server
= NFS_SERVER(inode
);
3224 static void nfs4_locku_release_calldata(void *data
)
3226 struct nfs4_unlockdata
*calldata
= data
;
3227 nfs_free_seqid(calldata
->arg
.seqid
);
3228 nfs4_put_lock_state(calldata
->lsp
);
3229 put_nfs_open_context(calldata
->ctx
);
3233 static void nfs4_locku_done(struct rpc_task
*task
, void *data
)
3235 struct nfs4_unlockdata
*calldata
= data
;
3237 if (RPC_ASSASSINATED(task
))
3239 nfs_increment_lock_seqid(task
->tk_status
, calldata
->arg
.seqid
);
3240 switch (task
->tk_status
) {
3242 memcpy(calldata
->lsp
->ls_stateid
.data
,
3243 calldata
->res
.stateid
.data
,
3244 sizeof(calldata
->lsp
->ls_stateid
.data
));
3245 renew_lease(calldata
->server
, calldata
->timestamp
);
3247 case -NFS4ERR_STALE_STATEID
:
3248 case -NFS4ERR_EXPIRED
:
3251 if (nfs4_async_handle_error(task
, calldata
->server
) == -EAGAIN
)
3252 rpc_restart_call(task
);
3256 static void nfs4_locku_prepare(struct rpc_task
*task
, void *data
)
3258 struct nfs4_unlockdata
*calldata
= data
;
3259 struct rpc_message msg
= {
3260 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKU
],
3261 .rpc_argp
= &calldata
->arg
,
3262 .rpc_resp
= &calldata
->res
,
3263 .rpc_cred
= calldata
->lsp
->ls_state
->owner
->so_cred
,
3266 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
3268 if ((calldata
->lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) == 0) {
3269 /* Note: exit _without_ running nfs4_locku_done */
3270 task
->tk_action
= NULL
;
3273 calldata
->timestamp
= jiffies
;
3274 rpc_call_setup(task
, &msg
, 0);
3277 static const struct rpc_call_ops nfs4_locku_ops
= {
3278 .rpc_call_prepare
= nfs4_locku_prepare
,
3279 .rpc_call_done
= nfs4_locku_done
,
3280 .rpc_release
= nfs4_locku_release_calldata
,
3283 static struct rpc_task
*nfs4_do_unlck(struct file_lock
*fl
,
3284 struct nfs_open_context
*ctx
,
3285 struct nfs4_lock_state
*lsp
,
3286 struct nfs_seqid
*seqid
)
3288 struct nfs4_unlockdata
*data
;
3290 /* Ensure this is an unlock - when canceling a lock, the
3291 * canceled lock is passed in, and it won't be an unlock.
3293 fl
->fl_type
= F_UNLCK
;
3295 data
= nfs4_alloc_unlockdata(fl
, ctx
, lsp
, seqid
);
3297 nfs_free_seqid(seqid
);
3298 return ERR_PTR(-ENOMEM
);
3301 return rpc_run_task(NFS_CLIENT(lsp
->ls_state
->inode
), RPC_TASK_ASYNC
, &nfs4_locku_ops
, data
);
3304 static int nfs4_proc_unlck(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3306 struct nfs_seqid
*seqid
;
3307 struct nfs4_lock_state
*lsp
;
3308 struct rpc_task
*task
;
3311 status
= nfs4_set_lock_state(state
, request
);
3312 /* Unlock _before_ we do the RPC call */
3313 request
->fl_flags
|= FL_EXISTS
;
3314 if (do_vfs_lock(request
->fl_file
, request
) == -ENOENT
)
3318 /* Is this a delegated lock? */
3319 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
3321 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3322 seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3326 task
= nfs4_do_unlck(request
, request
->fl_file
->private_data
, lsp
, seqid
);
3327 status
= PTR_ERR(task
);
3330 status
= nfs4_wait_for_completion_rpc_task(task
);
3336 struct nfs4_lockdata
{
3337 struct nfs_lock_args arg
;
3338 struct nfs_lock_res res
;
3339 struct nfs4_lock_state
*lsp
;
3340 struct nfs_open_context
*ctx
;
3341 struct file_lock fl
;
3342 unsigned long timestamp
;
3347 static struct nfs4_lockdata
*nfs4_alloc_lockdata(struct file_lock
*fl
,
3348 struct nfs_open_context
*ctx
, struct nfs4_lock_state
*lsp
)
3350 struct nfs4_lockdata
*p
;
3351 struct inode
*inode
= lsp
->ls_state
->inode
;
3352 struct nfs_server
*server
= NFS_SERVER(inode
);
3354 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
3358 p
->arg
.fh
= NFS_FH(inode
);
3360 p
->arg
.lock_seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3361 if (p
->arg
.lock_seqid
== NULL
)
3363 p
->arg
.lock_stateid
= &lsp
->ls_stateid
;
3364 p
->arg
.lock_owner
.clientid
= server
->nfs_client
->cl_clientid
;
3365 p
->arg
.lock_owner
.id
= lsp
->ls_id
.id
;
3367 atomic_inc(&lsp
->ls_count
);
3368 p
->ctx
= get_nfs_open_context(ctx
);
3369 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3376 static void nfs4_lock_prepare(struct rpc_task
*task
, void *calldata
)
3378 struct nfs4_lockdata
*data
= calldata
;
3379 struct nfs4_state
*state
= data
->lsp
->ls_state
;
3380 struct nfs4_state_owner
*sp
= state
->owner
;
3381 struct rpc_message msg
= {
3382 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCK
],
3383 .rpc_argp
= &data
->arg
,
3384 .rpc_resp
= &data
->res
,
3385 .rpc_cred
= sp
->so_cred
,
3388 if (nfs_wait_on_sequence(data
->arg
.lock_seqid
, task
) != 0)
3390 dprintk("%s: begin!\n", __FUNCTION__
);
3391 /* Do we need to do an open_to_lock_owner? */
3392 if (!(data
->arg
.lock_seqid
->sequence
->flags
& NFS_SEQID_CONFIRMED
)) {
3393 data
->arg
.open_seqid
= nfs_alloc_seqid(&sp
->so_seqid
);
3394 if (data
->arg
.open_seqid
== NULL
) {
3395 data
->rpc_status
= -ENOMEM
;
3396 task
->tk_action
= NULL
;
3399 data
->arg
.open_stateid
= &state
->stateid
;
3400 data
->arg
.new_lock_owner
= 1;
3402 data
->timestamp
= jiffies
;
3403 rpc_call_setup(task
, &msg
, 0);
3405 dprintk("%s: done!, ret = %d\n", __FUNCTION__
, data
->rpc_status
);
3408 static void nfs4_lock_done(struct rpc_task
*task
, void *calldata
)
3410 struct nfs4_lockdata
*data
= calldata
;
3412 dprintk("%s: begin!\n", __FUNCTION__
);
3414 data
->rpc_status
= task
->tk_status
;
3415 if (RPC_ASSASSINATED(task
))
3417 if (data
->arg
.new_lock_owner
!= 0) {
3418 nfs_increment_open_seqid(data
->rpc_status
, data
->arg
.open_seqid
);
3419 if (data
->rpc_status
== 0)
3420 nfs_confirm_seqid(&data
->lsp
->ls_seqid
, 0);
3424 if (data
->rpc_status
== 0) {
3425 memcpy(data
->lsp
->ls_stateid
.data
, data
->res
.stateid
.data
,
3426 sizeof(data
->lsp
->ls_stateid
.data
));
3427 data
->lsp
->ls_flags
|= NFS_LOCK_INITIALIZED
;
3428 renew_lease(NFS_SERVER(data
->ctx
->path
.dentry
->d_inode
), data
->timestamp
);
3430 nfs_increment_lock_seqid(data
->rpc_status
, data
->arg
.lock_seqid
);
3432 dprintk("%s: done, ret = %d!\n", __FUNCTION__
, data
->rpc_status
);
3435 static void nfs4_lock_release(void *calldata
)
3437 struct nfs4_lockdata
*data
= calldata
;
3439 dprintk("%s: begin!\n", __FUNCTION__
);
3440 if (data
->arg
.open_seqid
!= NULL
)
3441 nfs_free_seqid(data
->arg
.open_seqid
);
3442 if (data
->cancelled
!= 0) {
3443 struct rpc_task
*task
;
3444 task
= nfs4_do_unlck(&data
->fl
, data
->ctx
, data
->lsp
,
3445 data
->arg
.lock_seqid
);
3448 dprintk("%s: cancelling lock!\n", __FUNCTION__
);
3450 nfs_free_seqid(data
->arg
.lock_seqid
);
3451 nfs4_put_lock_state(data
->lsp
);
3452 put_nfs_open_context(data
->ctx
);
3454 dprintk("%s: done!\n", __FUNCTION__
);
3457 static const struct rpc_call_ops nfs4_lock_ops
= {
3458 .rpc_call_prepare
= nfs4_lock_prepare
,
3459 .rpc_call_done
= nfs4_lock_done
,
3460 .rpc_release
= nfs4_lock_release
,
3463 static int _nfs4_do_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*fl
, int reclaim
)
3465 struct nfs4_lockdata
*data
;
3466 struct rpc_task
*task
;
3469 dprintk("%s: begin!\n", __FUNCTION__
);
3470 data
= nfs4_alloc_lockdata(fl
, fl
->fl_file
->private_data
,
3471 fl
->fl_u
.nfs4_fl
.owner
);
3475 data
->arg
.block
= 1;
3477 data
->arg
.reclaim
= 1;
3478 task
= rpc_run_task(NFS_CLIENT(state
->inode
), RPC_TASK_ASYNC
,
3479 &nfs4_lock_ops
, data
);
3481 return PTR_ERR(task
);
3482 ret
= nfs4_wait_for_completion_rpc_task(task
);
3484 ret
= data
->rpc_status
;
3485 if (ret
== -NFS4ERR_DENIED
)
3488 data
->cancelled
= 1;
3490 dprintk("%s: done, ret = %d!\n", __FUNCTION__
, ret
);
3494 static int nfs4_lock_reclaim(struct nfs4_state
*state
, struct file_lock
*request
)
3496 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3497 struct nfs4_exception exception
= { };
3501 /* Cache the lock if possible... */
3502 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
3504 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 1);
3505 if (err
!= -NFS4ERR_DELAY
)
3507 nfs4_handle_exception(server
, err
, &exception
);
3508 } while (exception
.retry
);
3512 static int nfs4_lock_expired(struct nfs4_state
*state
, struct file_lock
*request
)
3514 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3515 struct nfs4_exception exception
= { };
3518 err
= nfs4_set_lock_state(state
, request
);
3522 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
3524 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 0);
3525 if (err
!= -NFS4ERR_DELAY
)
3527 nfs4_handle_exception(server
, err
, &exception
);
3528 } while (exception
.retry
);
3532 static int _nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3534 struct nfs_client
*clp
= state
->owner
->so_client
;
3535 unsigned char fl_flags
= request
->fl_flags
;
3538 /* Is this a delegated open? */
3539 status
= nfs4_set_lock_state(state
, request
);
3542 request
->fl_flags
|= FL_ACCESS
;
3543 status
= do_vfs_lock(request
->fl_file
, request
);
3546 down_read(&clp
->cl_sem
);
3547 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
)) {
3548 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
3549 /* Yes: cache locks! */
3550 down_read(&nfsi
->rwsem
);
3551 /* ...but avoid races with delegation recall... */
3552 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
)) {
3553 request
->fl_flags
= fl_flags
& ~FL_SLEEP
;
3554 status
= do_vfs_lock(request
->fl_file
, request
);
3555 up_read(&nfsi
->rwsem
);
3558 up_read(&nfsi
->rwsem
);
3560 status
= _nfs4_do_setlk(state
, cmd
, request
, 0);
3563 /* Note: we always want to sleep here! */
3564 request
->fl_flags
= fl_flags
| FL_SLEEP
;
3565 if (do_vfs_lock(request
->fl_file
, request
) < 0)
3566 printk(KERN_WARNING
"%s: VFS is out of sync with lock manager!\n", __FUNCTION__
);
3568 up_read(&clp
->cl_sem
);
3570 request
->fl_flags
= fl_flags
;
3574 static int nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3576 struct nfs4_exception exception
= { };
3580 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3581 _nfs4_proc_setlk(state
, cmd
, request
),
3583 } while (exception
.retry
);
3588 nfs4_proc_lock(struct file
*filp
, int cmd
, struct file_lock
*request
)
3590 struct nfs_open_context
*ctx
;
3591 struct nfs4_state
*state
;
3592 unsigned long timeout
= NFS4_LOCK_MINTIMEOUT
;
3595 /* verify open state */
3596 ctx
= (struct nfs_open_context
*)filp
->private_data
;
3599 if (request
->fl_start
< 0 || request
->fl_end
< 0)
3603 return nfs4_proc_getlk(state
, F_GETLK
, request
);
3605 if (!(IS_SETLK(cmd
) || IS_SETLKW(cmd
)))
3608 if (request
->fl_type
== F_UNLCK
)
3609 return nfs4_proc_unlck(state
, cmd
, request
);
3612 status
= nfs4_proc_setlk(state
, cmd
, request
);
3613 if ((status
!= -EAGAIN
) || IS_SETLK(cmd
))
3615 timeout
= nfs4_set_lock_task_retry(timeout
);
3616 status
= -ERESTARTSYS
;
3619 } while(status
< 0);
3623 int nfs4_lock_delegation_recall(struct nfs4_state
*state
, struct file_lock
*fl
)
3625 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3626 struct nfs4_exception exception
= { };
3629 err
= nfs4_set_lock_state(state
, fl
);
3633 err
= _nfs4_do_setlk(state
, F_SETLK
, fl
, 0);
3634 if (err
!= -NFS4ERR_DELAY
)
3636 err
= nfs4_handle_exception(server
, err
, &exception
);
3637 } while (exception
.retry
);
3642 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3644 int nfs4_setxattr(struct dentry
*dentry
, const char *key
, const void *buf
,
3645 size_t buflen
, int flags
)
3647 struct inode
*inode
= dentry
->d_inode
;
3649 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
3652 if (!S_ISREG(inode
->i_mode
) &&
3653 (!S_ISDIR(inode
->i_mode
) || inode
->i_mode
& S_ISVTX
))
3656 return nfs4_proc_set_acl(inode
, buf
, buflen
);
3659 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3660 * and that's what we'll do for e.g. user attributes that haven't been set.
3661 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3662 * attributes in kernel-managed attribute namespaces. */
3663 ssize_t
nfs4_getxattr(struct dentry
*dentry
, const char *key
, void *buf
,
3666 struct inode
*inode
= dentry
->d_inode
;
3668 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
3671 return nfs4_proc_get_acl(inode
, buf
, buflen
);
3674 ssize_t
nfs4_listxattr(struct dentry
*dentry
, char *buf
, size_t buflen
)
3676 size_t len
= strlen(XATTR_NAME_NFSV4_ACL
) + 1;
3678 if (!nfs4_server_supports_acls(NFS_SERVER(dentry
->d_inode
)))
3680 if (buf
&& buflen
< len
)
3683 memcpy(buf
, XATTR_NAME_NFSV4_ACL
, len
);
3687 int nfs4_proc_fs_locations(struct inode
*dir
, struct qstr
*name
,
3688 struct nfs4_fs_locations
*fs_locations
, struct page
*page
)
3690 struct nfs_server
*server
= NFS_SERVER(dir
);
3692 [0] = FATTR4_WORD0_FSID
| FATTR4_WORD0_FS_LOCATIONS
,
3693 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID
,
3695 struct nfs4_fs_locations_arg args
= {
3696 .dir_fh
= NFS_FH(dir
),
3701 struct rpc_message msg
= {
3702 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FS_LOCATIONS
],
3704 .rpc_resp
= fs_locations
,
3708 dprintk("%s: start\n", __FUNCTION__
);
3709 nfs_fattr_init(&fs_locations
->fattr
);
3710 fs_locations
->server
= server
;
3711 fs_locations
->nlocations
= 0;
3712 status
= rpc_call_sync(server
->client
, &msg
, 0);
3713 dprintk("%s: returned status = %d\n", __FUNCTION__
, status
);
3717 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops
= {
3718 .recover_open
= nfs4_open_reclaim
,
3719 .recover_lock
= nfs4_lock_reclaim
,
3722 struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops
= {
3723 .recover_open
= nfs4_open_expired
,
3724 .recover_lock
= nfs4_lock_expired
,
3727 static const struct inode_operations nfs4_file_inode_operations
= {
3728 .permission
= nfs_permission
,
3729 .getattr
= nfs_getattr
,
3730 .setattr
= nfs_setattr
,
3731 .getxattr
= nfs4_getxattr
,
3732 .setxattr
= nfs4_setxattr
,
3733 .listxattr
= nfs4_listxattr
,
3736 const struct nfs_rpc_ops nfs_v4_clientops
= {
3737 .version
= 4, /* protocol version */
3738 .dentry_ops
= &nfs4_dentry_operations
,
3739 .dir_inode_ops
= &nfs4_dir_inode_operations
,
3740 .file_inode_ops
= &nfs4_file_inode_operations
,
3741 .getroot
= nfs4_proc_get_root
,
3742 .getattr
= nfs4_proc_getattr
,
3743 .setattr
= nfs4_proc_setattr
,
3744 .lookupfh
= nfs4_proc_lookupfh
,
3745 .lookup
= nfs4_proc_lookup
,
3746 .access
= nfs4_proc_access
,
3747 .readlink
= nfs4_proc_readlink
,
3748 .create
= nfs4_proc_create
,
3749 .remove
= nfs4_proc_remove
,
3750 .unlink_setup
= nfs4_proc_unlink_setup
,
3751 .unlink_done
= nfs4_proc_unlink_done
,
3752 .rename
= nfs4_proc_rename
,
3753 .link
= nfs4_proc_link
,
3754 .symlink
= nfs4_proc_symlink
,
3755 .mkdir
= nfs4_proc_mkdir
,
3756 .rmdir
= nfs4_proc_remove
,
3757 .readdir
= nfs4_proc_readdir
,
3758 .mknod
= nfs4_proc_mknod
,
3759 .statfs
= nfs4_proc_statfs
,
3760 .fsinfo
= nfs4_proc_fsinfo
,
3761 .pathconf
= nfs4_proc_pathconf
,
3762 .set_capabilities
= nfs4_server_capabilities
,
3763 .decode_dirent
= nfs4_decode_dirent
,
3764 .read_setup
= nfs4_proc_read_setup
,
3765 .read_done
= nfs4_read_done
,
3766 .write_setup
= nfs4_proc_write_setup
,
3767 .write_done
= nfs4_write_done
,
3768 .commit_setup
= nfs4_proc_commit_setup
,
3769 .commit_done
= nfs4_commit_done
,
3770 .file_open
= nfs_open
,
3771 .file_release
= nfs_release
,
3772 .lock
= nfs4_proc_lock
,
3773 .clear_acl_cache
= nfs4_zap_acl_attr
,