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 int nfs4_open_recover_helper(struct nfs4_opendata
*opendata
, mode_t openflags
, struct nfs4_state
**res
)
557 struct nfs4_state
*newstate
;
560 opendata
->o_arg
.open_flags
= openflags
;
561 memset(&opendata
->o_res
, 0, sizeof(opendata
->o_res
));
562 memset(&opendata
->c_res
, 0, sizeof(opendata
->c_res
));
563 nfs4_init_opendata_res(opendata
);
564 ret
= _nfs4_proc_open(opendata
);
567 newstate
= nfs4_opendata_to_nfs4_state(opendata
);
568 if (IS_ERR(newstate
))
569 return PTR_ERR(newstate
);
570 nfs4_close_state(&opendata
->path
, newstate
, openflags
);
575 static int nfs4_open_recover(struct nfs4_opendata
*opendata
, struct nfs4_state
*state
)
577 struct nfs4_state
*newstate
;
580 /* memory barrier prior to reading state->n_* */
581 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
583 if (state
->n_rdwr
!= 0) {
584 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
|FMODE_WRITE
, &newstate
);
587 if (newstate
!= state
)
590 if (state
->n_wronly
!= 0) {
591 ret
= nfs4_open_recover_helper(opendata
, FMODE_WRITE
, &newstate
);
594 if (newstate
!= state
)
597 if (state
->n_rdonly
!= 0) {
598 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
, &newstate
);
601 if (newstate
!= state
)
605 * We may have performed cached opens for all three recoveries.
606 * Check if we need to update the current stateid.
608 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0 &&
609 memcmp(state
->stateid
.data
, state
->open_stateid
.data
, sizeof(state
->stateid
.data
)) != 0) {
610 write_seqlock(&state
->seqlock
);
611 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0)
612 memcpy(state
->stateid
.data
, state
->open_stateid
.data
, sizeof(state
->stateid
.data
));
613 write_sequnlock(&state
->seqlock
);
620 * reclaim state on the server after a reboot.
622 static int _nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
624 struct nfs_delegation
*delegation
;
625 struct nfs4_opendata
*opendata
;
626 int delegation_type
= 0;
629 opendata
= nfs4_opendata_alloc(&ctx
->path
, state
->owner
, 0, NULL
);
630 if (opendata
== NULL
)
632 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_PREVIOUS
;
633 opendata
->o_arg
.fh
= NFS_FH(state
->inode
);
634 nfs_copy_fh(&opendata
->o_res
.fh
, opendata
->o_arg
.fh
);
636 delegation
= rcu_dereference(NFS_I(state
->inode
)->delegation
);
637 if (delegation
!= NULL
&& (delegation
->flags
& NFS_DELEGATION_NEED_RECLAIM
) != 0)
638 delegation_type
= delegation
->flags
;
640 opendata
->o_arg
.u
.delegation_type
= delegation_type
;
641 status
= nfs4_open_recover(opendata
, state
);
642 nfs4_opendata_put(opendata
);
646 static int nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
648 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
649 struct nfs4_exception exception
= { };
652 err
= _nfs4_do_open_reclaim(ctx
, state
);
653 if (err
!= -NFS4ERR_DELAY
)
655 nfs4_handle_exception(server
, err
, &exception
);
656 } while (exception
.retry
);
660 static int nfs4_open_reclaim(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
662 struct nfs_open_context
*ctx
;
665 ctx
= nfs4_state_find_open_context(state
);
668 ret
= nfs4_do_open_reclaim(ctx
, state
);
669 put_nfs_open_context(ctx
);
673 static int _nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
675 struct nfs4_state_owner
*sp
= state
->owner
;
676 struct nfs4_opendata
*opendata
;
679 opendata
= nfs4_opendata_alloc(&ctx
->path
, sp
, 0, NULL
);
680 if (opendata
== NULL
)
682 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_DELEGATE_CUR
;
683 memcpy(opendata
->o_arg
.u
.delegation
.data
, stateid
->data
,
684 sizeof(opendata
->o_arg
.u
.delegation
.data
));
685 ret
= nfs4_open_recover(opendata
, state
);
686 nfs4_opendata_put(opendata
);
690 int nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
692 struct nfs4_exception exception
= { };
693 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
696 err
= _nfs4_open_delegation_recall(ctx
, state
, stateid
);
700 case -NFS4ERR_STALE_CLIENTID
:
701 case -NFS4ERR_STALE_STATEID
:
702 case -NFS4ERR_EXPIRED
:
703 /* Don't recall a delegation if it was lost */
704 nfs4_schedule_state_recovery(server
->nfs_client
);
707 err
= nfs4_handle_exception(server
, err
, &exception
);
708 } while (exception
.retry
);
712 static void nfs4_open_confirm_prepare(struct rpc_task
*task
, void *calldata
)
714 struct nfs4_opendata
*data
= calldata
;
715 struct rpc_message msg
= {
716 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_CONFIRM
],
717 .rpc_argp
= &data
->c_arg
,
718 .rpc_resp
= &data
->c_res
,
719 .rpc_cred
= data
->owner
->so_cred
,
721 data
->timestamp
= jiffies
;
722 rpc_call_setup(task
, &msg
, 0);
725 static void nfs4_open_confirm_done(struct rpc_task
*task
, void *calldata
)
727 struct nfs4_opendata
*data
= calldata
;
729 data
->rpc_status
= task
->tk_status
;
730 if (RPC_ASSASSINATED(task
))
732 if (data
->rpc_status
== 0) {
733 memcpy(data
->o_res
.stateid
.data
, data
->c_res
.stateid
.data
,
734 sizeof(data
->o_res
.stateid
.data
));
735 renew_lease(data
->o_res
.server
, data
->timestamp
);
738 nfs_confirm_seqid(&data
->owner
->so_seqid
, data
->rpc_status
);
739 nfs_increment_open_seqid(data
->rpc_status
, data
->c_arg
.seqid
);
742 static void nfs4_open_confirm_release(void *calldata
)
744 struct nfs4_opendata
*data
= calldata
;
745 struct nfs4_state
*state
= NULL
;
747 /* If this request hasn't been cancelled, do nothing */
748 if (data
->cancelled
== 0)
750 /* In case of error, no cleanup! */
753 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
754 state
= nfs4_opendata_to_nfs4_state(data
);
756 nfs4_close_state(&data
->path
, state
, data
->o_arg
.open_flags
);
758 nfs4_opendata_put(data
);
761 static const struct rpc_call_ops nfs4_open_confirm_ops
= {
762 .rpc_call_prepare
= nfs4_open_confirm_prepare
,
763 .rpc_call_done
= nfs4_open_confirm_done
,
764 .rpc_release
= nfs4_open_confirm_release
,
768 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
770 static int _nfs4_proc_open_confirm(struct nfs4_opendata
*data
)
772 struct nfs_server
*server
= NFS_SERVER(data
->dir
->d_inode
);
773 struct rpc_task
*task
;
776 kref_get(&data
->kref
);
778 data
->rpc_status
= 0;
779 task
= rpc_run_task(server
->client
, RPC_TASK_ASYNC
, &nfs4_open_confirm_ops
, data
);
781 return PTR_ERR(task
);
782 status
= nfs4_wait_for_completion_rpc_task(task
);
787 status
= data
->rpc_status
;
792 static void nfs4_open_prepare(struct rpc_task
*task
, void *calldata
)
794 struct nfs4_opendata
*data
= calldata
;
795 struct nfs4_state_owner
*sp
= data
->owner
;
796 struct rpc_message msg
= {
797 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN
],
798 .rpc_argp
= &data
->o_arg
,
799 .rpc_resp
= &data
->o_res
,
800 .rpc_cred
= sp
->so_cred
,
803 if (nfs_wait_on_sequence(data
->o_arg
.seqid
, task
) != 0)
806 * Check if we still need to send an OPEN call, or if we can use
807 * a delegation instead.
809 if (data
->state
!= NULL
) {
810 struct nfs_delegation
*delegation
;
812 if (can_open_cached(data
->state
, data
->o_arg
.open_flags
& (FMODE_READ
|FMODE_WRITE
|O_EXCL
)))
815 delegation
= rcu_dereference(NFS_I(data
->state
->inode
)->delegation
);
816 if (delegation
!= NULL
&&
817 (delegation
->flags
& NFS_DELEGATION_NEED_RECLAIM
) == 0) {
823 /* Update sequence id. */
824 data
->o_arg
.id
= sp
->so_owner_id
.id
;
825 data
->o_arg
.clientid
= sp
->so_client
->cl_clientid
;
826 if (data
->o_arg
.claim
== NFS4_OPEN_CLAIM_PREVIOUS
)
827 msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_NOATTR
];
828 data
->timestamp
= jiffies
;
829 rpc_call_setup(task
, &msg
, 0);
832 task
->tk_action
= NULL
;
836 static void nfs4_open_done(struct rpc_task
*task
, void *calldata
)
838 struct nfs4_opendata
*data
= calldata
;
840 data
->rpc_status
= task
->tk_status
;
841 if (RPC_ASSASSINATED(task
))
843 if (task
->tk_status
== 0) {
844 switch (data
->o_res
.f_attr
->mode
& S_IFMT
) {
848 data
->rpc_status
= -ELOOP
;
851 data
->rpc_status
= -EISDIR
;
854 data
->rpc_status
= -ENOTDIR
;
856 renew_lease(data
->o_res
.server
, data
->timestamp
);
857 if (!(data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
))
858 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
860 nfs_increment_open_seqid(data
->rpc_status
, data
->o_arg
.seqid
);
864 static void nfs4_open_release(void *calldata
)
866 struct nfs4_opendata
*data
= calldata
;
867 struct nfs4_state
*state
= NULL
;
869 /* If this request hasn't been cancelled, do nothing */
870 if (data
->cancelled
== 0)
872 /* In case of error, no cleanup! */
873 if (data
->rpc_status
!= 0 || !data
->rpc_done
)
875 /* In case we need an open_confirm, no cleanup! */
876 if (data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
)
878 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
879 state
= nfs4_opendata_to_nfs4_state(data
);
881 nfs4_close_state(&data
->path
, state
, data
->o_arg
.open_flags
);
883 nfs4_opendata_put(data
);
886 static const struct rpc_call_ops nfs4_open_ops
= {
887 .rpc_call_prepare
= nfs4_open_prepare
,
888 .rpc_call_done
= nfs4_open_done
,
889 .rpc_release
= nfs4_open_release
,
893 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
895 static int _nfs4_proc_open(struct nfs4_opendata
*data
)
897 struct inode
*dir
= data
->dir
->d_inode
;
898 struct nfs_server
*server
= NFS_SERVER(dir
);
899 struct nfs_openargs
*o_arg
= &data
->o_arg
;
900 struct nfs_openres
*o_res
= &data
->o_res
;
901 struct rpc_task
*task
;
904 kref_get(&data
->kref
);
906 data
->rpc_status
= 0;
908 task
= rpc_run_task(server
->client
, RPC_TASK_ASYNC
, &nfs4_open_ops
, data
);
910 return PTR_ERR(task
);
911 status
= nfs4_wait_for_completion_rpc_task(task
);
916 status
= data
->rpc_status
;
918 if (status
!= 0 || !data
->rpc_done
)
921 if (o_arg
->open_flags
& O_CREAT
) {
922 update_changeattr(dir
, &o_res
->cinfo
);
923 nfs_post_op_update_inode(dir
, o_res
->dir_attr
);
925 nfs_refresh_inode(dir
, o_res
->dir_attr
);
926 if(o_res
->rflags
& NFS4_OPEN_RESULT_CONFIRM
) {
927 status
= _nfs4_proc_open_confirm(data
);
931 if (!(o_res
->f_attr
->valid
& NFS_ATTR_FATTR
))
932 return server
->nfs_client
->rpc_ops
->getattr(server
, &o_res
->fh
, o_res
->f_attr
);
936 static int _nfs4_do_access(struct inode
*inode
, struct rpc_cred
*cred
, int openflags
)
938 struct nfs_access_entry cache
;
942 if (openflags
& FMODE_READ
)
944 if (openflags
& FMODE_WRITE
)
946 if (openflags
& FMODE_EXEC
)
948 status
= nfs_access_get_cached(inode
, cred
, &cache
);
952 /* Be clever: ask server to check for all possible rights */
953 cache
.mask
= MAY_EXEC
| MAY_WRITE
| MAY_READ
;
955 cache
.jiffies
= jiffies
;
956 status
= _nfs4_proc_access(inode
, &cache
);
959 nfs_access_add_cache(inode
, &cache
);
961 if ((cache
.mask
& mask
) == mask
)
966 static int nfs4_recover_expired_lease(struct nfs_server
*server
)
968 struct nfs_client
*clp
= server
->nfs_client
;
972 ret
= nfs4_wait_clnt_recover(server
->client
, clp
);
975 if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
))
977 nfs4_schedule_state_recovery(clp
);
984 * reclaim state on the server after a network partition.
985 * Assumes caller holds the appropriate lock
987 static int _nfs4_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
989 struct nfs4_opendata
*opendata
;
992 opendata
= nfs4_opendata_alloc(&ctx
->path
, state
->owner
, 0, NULL
);
993 if (opendata
== NULL
)
995 ret
= nfs4_open_recover(opendata
, state
);
996 if (ret
== -ESTALE
) {
997 /* Invalidate the state owner so we don't ever use it again */
998 nfs4_drop_state_owner(state
->owner
);
999 d_drop(ctx
->path
.dentry
);
1001 nfs4_opendata_put(opendata
);
1005 static inline int nfs4_do_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1007 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1008 struct nfs4_exception exception
= { };
1012 err
= _nfs4_open_expired(ctx
, state
);
1013 if (err
== -NFS4ERR_DELAY
)
1014 nfs4_handle_exception(server
, err
, &exception
);
1015 } while (exception
.retry
);
1019 static int nfs4_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
1021 struct nfs_open_context
*ctx
;
1024 ctx
= nfs4_state_find_open_context(state
);
1026 return PTR_ERR(ctx
);
1027 ret
= nfs4_do_open_expired(ctx
, state
);
1028 put_nfs_open_context(ctx
);
1033 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1034 * fields corresponding to attributes that were used to store the verifier.
1035 * Make sure we clobber those fields in the later setattr call
1037 static inline void nfs4_exclusive_attrset(struct nfs4_opendata
*opendata
, struct iattr
*sattr
)
1039 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_ACCESS
) &&
1040 !(sattr
->ia_valid
& ATTR_ATIME_SET
))
1041 sattr
->ia_valid
|= ATTR_ATIME
;
1043 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_MODIFY
) &&
1044 !(sattr
->ia_valid
& ATTR_MTIME_SET
))
1045 sattr
->ia_valid
|= ATTR_MTIME
;
1049 * Returns a referenced nfs4_state
1051 static int _nfs4_do_open(struct inode
*dir
, struct path
*path
, int flags
, struct iattr
*sattr
, struct rpc_cred
*cred
, struct nfs4_state
**res
)
1053 struct nfs4_state_owner
*sp
;
1054 struct nfs4_state
*state
= NULL
;
1055 struct nfs_server
*server
= NFS_SERVER(dir
);
1056 struct nfs_client
*clp
= server
->nfs_client
;
1057 struct nfs4_opendata
*opendata
;
1060 /* Protect against reboot recovery conflicts */
1062 if (!(sp
= nfs4_get_state_owner(server
, cred
))) {
1063 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1066 status
= nfs4_recover_expired_lease(server
);
1068 goto err_put_state_owner
;
1069 if (path
->dentry
->d_inode
!= NULL
)
1070 nfs4_return_incompatible_delegation(path
->dentry
->d_inode
, flags
& (FMODE_READ
|FMODE_WRITE
));
1071 down_read(&clp
->cl_sem
);
1073 opendata
= nfs4_opendata_alloc(path
, sp
, flags
, sattr
);
1074 if (opendata
== NULL
)
1075 goto err_release_rwsem
;
1077 if (path
->dentry
->d_inode
!= NULL
)
1078 opendata
->state
= nfs4_get_open_state(path
->dentry
->d_inode
, sp
);
1080 status
= _nfs4_proc_open(opendata
);
1082 goto err_opendata_put
;
1084 if (opendata
->o_arg
.open_flags
& O_EXCL
)
1085 nfs4_exclusive_attrset(opendata
, sattr
);
1087 state
= nfs4_opendata_to_nfs4_state(opendata
);
1088 status
= PTR_ERR(state
);
1090 goto err_opendata_put
;
1091 nfs4_opendata_put(opendata
);
1092 nfs4_put_state_owner(sp
);
1093 up_read(&clp
->cl_sem
);
1097 nfs4_opendata_put(opendata
);
1099 up_read(&clp
->cl_sem
);
1100 err_put_state_owner
:
1101 nfs4_put_state_owner(sp
);
1108 static struct nfs4_state
*nfs4_do_open(struct inode
*dir
, struct path
*path
, int flags
, struct iattr
*sattr
, struct rpc_cred
*cred
)
1110 struct nfs4_exception exception
= { };
1111 struct nfs4_state
*res
;
1115 status
= _nfs4_do_open(dir
, path
, flags
, sattr
, cred
, &res
);
1118 /* NOTE: BAD_SEQID means the server and client disagree about the
1119 * book-keeping w.r.t. state-changing operations
1120 * (OPEN/CLOSE/LOCK/LOCKU...)
1121 * It is actually a sign of a bug on the client or on the server.
1123 * If we receive a BAD_SEQID error in the particular case of
1124 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1125 * have unhashed the old state_owner for us, and that we can
1126 * therefore safely retry using a new one. We should still warn
1127 * the user though...
1129 if (status
== -NFS4ERR_BAD_SEQID
) {
1130 printk(KERN_WARNING
"NFS: v4 server %s "
1131 " returned a bad sequence-id error!\n",
1132 NFS_SERVER(dir
)->nfs_client
->cl_hostname
);
1133 exception
.retry
= 1;
1137 * BAD_STATEID on OPEN means that the server cancelled our
1138 * state before it received the OPEN_CONFIRM.
1139 * Recover by retrying the request as per the discussion
1140 * on Page 181 of RFC3530.
1142 if (status
== -NFS4ERR_BAD_STATEID
) {
1143 exception
.retry
= 1;
1146 if (status
== -EAGAIN
) {
1147 /* We must have found a delegation */
1148 exception
.retry
= 1;
1151 res
= ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir
),
1152 status
, &exception
));
1153 } while (exception
.retry
);
1157 static int _nfs4_do_setattr(struct inode
*inode
, struct nfs_fattr
*fattr
,
1158 struct iattr
*sattr
, struct nfs4_state
*state
)
1160 struct nfs_server
*server
= NFS_SERVER(inode
);
1161 struct nfs_setattrargs arg
= {
1162 .fh
= NFS_FH(inode
),
1165 .bitmask
= server
->attr_bitmask
,
1167 struct nfs_setattrres res
= {
1171 struct rpc_message msg
= {
1172 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETATTR
],
1176 unsigned long timestamp
= jiffies
;
1179 nfs_fattr_init(fattr
);
1181 if (nfs4_copy_delegation_stateid(&arg
.stateid
, inode
)) {
1182 /* Use that stateid */
1183 } else if (state
!= NULL
) {
1184 msg
.rpc_cred
= state
->owner
->so_cred
;
1185 nfs4_copy_stateid(&arg
.stateid
, state
, current
->files
);
1187 memcpy(&arg
.stateid
, &zero_stateid
, sizeof(arg
.stateid
));
1189 status
= rpc_call_sync(server
->client
, &msg
, 0);
1190 if (status
== 0 && state
!= NULL
)
1191 renew_lease(server
, timestamp
);
1195 static int nfs4_do_setattr(struct inode
*inode
, struct nfs_fattr
*fattr
,
1196 struct iattr
*sattr
, struct nfs4_state
*state
)
1198 struct nfs_server
*server
= NFS_SERVER(inode
);
1199 struct nfs4_exception exception
= { };
1202 err
= nfs4_handle_exception(server
,
1203 _nfs4_do_setattr(inode
, fattr
, sattr
, state
),
1205 } while (exception
.retry
);
1209 struct nfs4_closedata
{
1211 struct inode
*inode
;
1212 struct nfs4_state
*state
;
1213 struct nfs_closeargs arg
;
1214 struct nfs_closeres res
;
1215 struct nfs_fattr fattr
;
1216 unsigned long timestamp
;
1219 static void nfs4_free_closedata(void *data
)
1221 struct nfs4_closedata
*calldata
= data
;
1222 struct nfs4_state_owner
*sp
= calldata
->state
->owner
;
1224 nfs4_put_open_state(calldata
->state
);
1225 nfs_free_seqid(calldata
->arg
.seqid
);
1226 nfs4_put_state_owner(sp
);
1227 dput(calldata
->path
.dentry
);
1228 mntput(calldata
->path
.mnt
);
1232 static void nfs4_close_done(struct rpc_task
*task
, void *data
)
1234 struct nfs4_closedata
*calldata
= data
;
1235 struct nfs4_state
*state
= calldata
->state
;
1236 struct nfs_server
*server
= NFS_SERVER(calldata
->inode
);
1238 if (RPC_ASSASSINATED(task
))
1240 /* hmm. we are done with the inode, and in the process of freeing
1241 * the state_owner. we keep this around to process errors
1243 nfs_increment_open_seqid(task
->tk_status
, calldata
->arg
.seqid
);
1244 switch (task
->tk_status
) {
1246 nfs_set_open_stateid(state
, &calldata
->res
.stateid
, calldata
->arg
.open_flags
);
1247 renew_lease(server
, calldata
->timestamp
);
1249 case -NFS4ERR_STALE_STATEID
:
1250 case -NFS4ERR_EXPIRED
:
1253 if (nfs4_async_handle_error(task
, server
) == -EAGAIN
) {
1254 rpc_restart_call(task
);
1258 nfs_refresh_inode(calldata
->inode
, calldata
->res
.fattr
);
1261 static void nfs4_close_prepare(struct rpc_task
*task
, void *data
)
1263 struct nfs4_closedata
*calldata
= data
;
1264 struct nfs4_state
*state
= calldata
->state
;
1265 struct rpc_message msg
= {
1266 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CLOSE
],
1267 .rpc_argp
= &calldata
->arg
,
1268 .rpc_resp
= &calldata
->res
,
1269 .rpc_cred
= state
->owner
->so_cred
,
1271 int clear_rd
, clear_wr
, clear_rdwr
;
1274 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
1277 mode
= FMODE_READ
|FMODE_WRITE
;
1278 clear_rd
= clear_wr
= clear_rdwr
= 0;
1279 spin_lock(&state
->owner
->so_lock
);
1280 /* Calculate the change in open mode */
1281 if (state
->n_rdwr
== 0) {
1282 if (state
->n_rdonly
== 0) {
1283 mode
&= ~FMODE_READ
;
1284 clear_rd
|= test_and_clear_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
1285 clear_rdwr
|= test_and_clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1287 if (state
->n_wronly
== 0) {
1288 mode
&= ~FMODE_WRITE
;
1289 clear_wr
|= test_and_clear_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
1290 clear_rdwr
|= test_and_clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1293 spin_unlock(&state
->owner
->so_lock
);
1294 if (!clear_rd
&& !clear_wr
&& !clear_rdwr
) {
1295 /* Note: exit _without_ calling nfs4_close_done */
1296 task
->tk_action
= NULL
;
1299 nfs_fattr_init(calldata
->res
.fattr
);
1301 msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_DOWNGRADE
];
1302 calldata
->arg
.open_flags
= mode
;
1303 calldata
->timestamp
= jiffies
;
1304 rpc_call_setup(task
, &msg
, 0);
1307 static const struct rpc_call_ops nfs4_close_ops
= {
1308 .rpc_call_prepare
= nfs4_close_prepare
,
1309 .rpc_call_done
= nfs4_close_done
,
1310 .rpc_release
= nfs4_free_closedata
,
1314 * It is possible for data to be read/written from a mem-mapped file
1315 * after the sys_close call (which hits the vfs layer as a flush).
1316 * This means that we can't safely call nfsv4 close on a file until
1317 * the inode is cleared. This in turn means that we are not good
1318 * NFSv4 citizens - we do not indicate to the server to update the file's
1319 * share state even when we are done with one of the three share
1320 * stateid's in the inode.
1322 * NOTE: Caller must be holding the sp->so_owner semaphore!
1324 int nfs4_do_close(struct path
*path
, struct nfs4_state
*state
)
1326 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1327 struct nfs4_closedata
*calldata
;
1328 struct nfs4_state_owner
*sp
= state
->owner
;
1329 struct rpc_task
*task
;
1330 int status
= -ENOMEM
;
1332 calldata
= kmalloc(sizeof(*calldata
), GFP_KERNEL
);
1333 if (calldata
== NULL
)
1335 calldata
->inode
= state
->inode
;
1336 calldata
->state
= state
;
1337 calldata
->arg
.fh
= NFS_FH(state
->inode
);
1338 calldata
->arg
.stateid
= &state
->open_stateid
;
1339 /* Serialization for the sequence id */
1340 calldata
->arg
.seqid
= nfs_alloc_seqid(&state
->owner
->so_seqid
);
1341 if (calldata
->arg
.seqid
== NULL
)
1342 goto out_free_calldata
;
1343 calldata
->arg
.bitmask
= server
->attr_bitmask
;
1344 calldata
->res
.fattr
= &calldata
->fattr
;
1345 calldata
->res
.server
= server
;
1346 calldata
->path
.mnt
= mntget(path
->mnt
);
1347 calldata
->path
.dentry
= dget(path
->dentry
);
1349 task
= rpc_run_task(server
->client
, RPC_TASK_ASYNC
, &nfs4_close_ops
, calldata
);
1351 return PTR_ERR(task
);
1357 nfs4_put_open_state(state
);
1358 nfs4_put_state_owner(sp
);
1362 static int nfs4_intent_set_file(struct nameidata
*nd
, struct path
*path
, struct nfs4_state
*state
)
1367 /* If the open_intent is for execute, we have an extra check to make */
1368 if (nd
->intent
.open
.flags
& FMODE_EXEC
) {
1369 ret
= _nfs4_do_access(state
->inode
,
1370 state
->owner
->so_cred
,
1371 nd
->intent
.open
.flags
);
1375 filp
= lookup_instantiate_filp(nd
, path
->dentry
, NULL
);
1376 if (!IS_ERR(filp
)) {
1377 struct nfs_open_context
*ctx
;
1378 ctx
= (struct nfs_open_context
*)filp
->private_data
;
1382 ret
= PTR_ERR(filp
);
1384 nfs4_close_state(path
, state
, nd
->intent
.open
.flags
);
1389 nfs4_atomic_open(struct inode
*dir
, struct dentry
*dentry
, struct nameidata
*nd
)
1391 struct path path
= {
1396 struct rpc_cred
*cred
;
1397 struct nfs4_state
*state
;
1400 if (nd
->flags
& LOOKUP_CREATE
) {
1401 attr
.ia_mode
= nd
->intent
.open
.create_mode
;
1402 attr
.ia_valid
= ATTR_MODE
;
1403 if (!IS_POSIXACL(dir
))
1404 attr
.ia_mode
&= ~current
->fs
->umask
;
1407 BUG_ON(nd
->intent
.open
.flags
& O_CREAT
);
1410 cred
= rpcauth_lookupcred(NFS_CLIENT(dir
)->cl_auth
, 0);
1412 return (struct dentry
*)cred
;
1413 state
= nfs4_do_open(dir
, &path
, nd
->intent
.open
.flags
, &attr
, cred
);
1415 if (IS_ERR(state
)) {
1416 if (PTR_ERR(state
) == -ENOENT
)
1417 d_add(dentry
, NULL
);
1418 return (struct dentry
*)state
;
1420 res
= d_add_unique(dentry
, igrab(state
->inode
));
1423 nfs4_intent_set_file(nd
, &path
, state
);
1428 nfs4_open_revalidate(struct inode
*dir
, struct dentry
*dentry
, int openflags
, struct nameidata
*nd
)
1430 struct path path
= {
1434 struct rpc_cred
*cred
;
1435 struct nfs4_state
*state
;
1437 cred
= rpcauth_lookupcred(NFS_CLIENT(dir
)->cl_auth
, 0);
1439 return PTR_ERR(cred
);
1440 state
= nfs4_do_open(dir
, &path
, openflags
, NULL
, cred
);
1442 if (IS_ERR(state
)) {
1443 switch (PTR_ERR(state
)) {
1449 lookup_instantiate_filp(nd
, (struct dentry
*)state
, NULL
);
1455 if (state
->inode
== dentry
->d_inode
) {
1456 nfs4_intent_set_file(nd
, &path
, state
);
1459 nfs4_close_state(&path
, state
, openflags
);
1466 static int _nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1468 struct nfs4_server_caps_res res
= {};
1469 struct rpc_message msg
= {
1470 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SERVER_CAPS
],
1471 .rpc_argp
= fhandle
,
1476 status
= rpc_call_sync(server
->client
, &msg
, 0);
1478 memcpy(server
->attr_bitmask
, res
.attr_bitmask
, sizeof(server
->attr_bitmask
));
1479 if (res
.attr_bitmask
[0] & FATTR4_WORD0_ACL
)
1480 server
->caps
|= NFS_CAP_ACLS
;
1481 if (res
.has_links
!= 0)
1482 server
->caps
|= NFS_CAP_HARDLINKS
;
1483 if (res
.has_symlinks
!= 0)
1484 server
->caps
|= NFS_CAP_SYMLINKS
;
1485 server
->acl_bitmask
= res
.acl_bitmask
;
1490 int nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1492 struct nfs4_exception exception
= { };
1495 err
= nfs4_handle_exception(server
,
1496 _nfs4_server_capabilities(server
, fhandle
),
1498 } while (exception
.retry
);
1502 static int _nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1503 struct nfs_fsinfo
*info
)
1505 struct nfs4_lookup_root_arg args
= {
1506 .bitmask
= nfs4_fattr_bitmap
,
1508 struct nfs4_lookup_res res
= {
1510 .fattr
= info
->fattr
,
1513 struct rpc_message msg
= {
1514 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP_ROOT
],
1518 nfs_fattr_init(info
->fattr
);
1519 return rpc_call_sync(server
->client
, &msg
, 0);
1522 static int nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1523 struct nfs_fsinfo
*info
)
1525 struct nfs4_exception exception
= { };
1528 err
= nfs4_handle_exception(server
,
1529 _nfs4_lookup_root(server
, fhandle
, info
),
1531 } while (exception
.retry
);
1536 * get the file handle for the "/" directory on the server
1538 static int nfs4_proc_get_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1539 struct nfs_fsinfo
*info
)
1543 status
= nfs4_lookup_root(server
, fhandle
, info
);
1545 status
= nfs4_server_capabilities(server
, fhandle
);
1547 status
= nfs4_do_fsinfo(server
, fhandle
, info
);
1548 return nfs4_map_errors(status
);
1552 * Get locations and (maybe) other attributes of a referral.
1553 * Note that we'll actually follow the referral later when
1554 * we detect fsid mismatch in inode revalidation
1556 static int nfs4_get_referral(struct inode
*dir
, struct qstr
*name
, struct nfs_fattr
*fattr
, struct nfs_fh
*fhandle
)
1558 int status
= -ENOMEM
;
1559 struct page
*page
= NULL
;
1560 struct nfs4_fs_locations
*locations
= NULL
;
1562 page
= alloc_page(GFP_KERNEL
);
1565 locations
= kmalloc(sizeof(struct nfs4_fs_locations
), GFP_KERNEL
);
1566 if (locations
== NULL
)
1569 status
= nfs4_proc_fs_locations(dir
, name
, locations
, page
);
1572 /* Make sure server returned a different fsid for the referral */
1573 if (nfs_fsid_equal(&NFS_SERVER(dir
)->fsid
, &locations
->fattr
.fsid
)) {
1574 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__
, name
->name
);
1579 memcpy(fattr
, &locations
->fattr
, sizeof(struct nfs_fattr
));
1580 fattr
->valid
|= NFS_ATTR_FATTR_V4_REFERRAL
;
1582 fattr
->mode
= S_IFDIR
;
1583 memset(fhandle
, 0, sizeof(struct nfs_fh
));
1592 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1594 struct nfs4_getattr_arg args
= {
1596 .bitmask
= server
->attr_bitmask
,
1598 struct nfs4_getattr_res res
= {
1602 struct rpc_message msg
= {
1603 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETATTR
],
1608 nfs_fattr_init(fattr
);
1609 return rpc_call_sync(server
->client
, &msg
, 0);
1612 static int nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1614 struct nfs4_exception exception
= { };
1617 err
= nfs4_handle_exception(server
,
1618 _nfs4_proc_getattr(server
, fhandle
, fattr
),
1620 } while (exception
.retry
);
1625 * The file is not closed if it is opened due to the a request to change
1626 * the size of the file. The open call will not be needed once the
1627 * VFS layer lookup-intents are implemented.
1629 * Close is called when the inode is destroyed.
1630 * If we haven't opened the file for O_WRONLY, we
1631 * need to in the size_change case to obtain a stateid.
1634 * Because OPEN is always done by name in nfsv4, it is
1635 * possible that we opened a different file by the same
1636 * name. We can recognize this race condition, but we
1637 * can't do anything about it besides returning an error.
1639 * This will be fixed with VFS changes (lookup-intent).
1642 nfs4_proc_setattr(struct dentry
*dentry
, struct nfs_fattr
*fattr
,
1643 struct iattr
*sattr
)
1645 struct rpc_cred
*cred
;
1646 struct inode
*inode
= dentry
->d_inode
;
1647 struct nfs_open_context
*ctx
;
1648 struct nfs4_state
*state
= NULL
;
1651 nfs_fattr_init(fattr
);
1653 cred
= rpcauth_lookupcred(NFS_CLIENT(inode
)->cl_auth
, 0);
1655 return PTR_ERR(cred
);
1657 /* Search for an existing open(O_WRITE) file */
1658 ctx
= nfs_find_open_context(inode
, cred
, FMODE_WRITE
);
1662 status
= nfs4_do_setattr(inode
, fattr
, sattr
, state
);
1664 nfs_setattr_update_inode(inode
, sattr
);
1666 put_nfs_open_context(ctx
);
1671 static int _nfs4_proc_lookupfh(struct nfs_server
*server
, struct nfs_fh
*dirfh
,
1672 struct qstr
*name
, struct nfs_fh
*fhandle
,
1673 struct nfs_fattr
*fattr
)
1676 struct nfs4_lookup_arg args
= {
1677 .bitmask
= server
->attr_bitmask
,
1681 struct nfs4_lookup_res res
= {
1686 struct rpc_message msg
= {
1687 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP
],
1692 nfs_fattr_init(fattr
);
1694 dprintk("NFS call lookupfh %s\n", name
->name
);
1695 status
= rpc_call_sync(server
->client
, &msg
, 0);
1696 dprintk("NFS reply lookupfh: %d\n", status
);
1700 static int nfs4_proc_lookupfh(struct nfs_server
*server
, struct nfs_fh
*dirfh
,
1701 struct qstr
*name
, struct nfs_fh
*fhandle
,
1702 struct nfs_fattr
*fattr
)
1704 struct nfs4_exception exception
= { };
1707 err
= _nfs4_proc_lookupfh(server
, dirfh
, name
, fhandle
, fattr
);
1709 if (err
== -NFS4ERR_MOVED
) {
1713 err
= nfs4_handle_exception(server
, err
, &exception
);
1714 } while (exception
.retry
);
1718 static int _nfs4_proc_lookup(struct inode
*dir
, struct qstr
*name
,
1719 struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1723 dprintk("NFS call lookup %s\n", name
->name
);
1724 status
= _nfs4_proc_lookupfh(NFS_SERVER(dir
), NFS_FH(dir
), name
, fhandle
, fattr
);
1725 if (status
== -NFS4ERR_MOVED
)
1726 status
= nfs4_get_referral(dir
, name
, fattr
, fhandle
);
1727 dprintk("NFS reply lookup: %d\n", status
);
1731 static int nfs4_proc_lookup(struct inode
*dir
, struct qstr
*name
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1733 struct nfs4_exception exception
= { };
1736 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1737 _nfs4_proc_lookup(dir
, name
, fhandle
, fattr
),
1739 } while (exception
.retry
);
1743 static int _nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
1745 struct nfs4_accessargs args
= {
1746 .fh
= NFS_FH(inode
),
1748 struct nfs4_accessres res
= { 0 };
1749 struct rpc_message msg
= {
1750 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_ACCESS
],
1753 .rpc_cred
= entry
->cred
,
1755 int mode
= entry
->mask
;
1759 * Determine which access bits we want to ask for...
1761 if (mode
& MAY_READ
)
1762 args
.access
|= NFS4_ACCESS_READ
;
1763 if (S_ISDIR(inode
->i_mode
)) {
1764 if (mode
& MAY_WRITE
)
1765 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
;
1766 if (mode
& MAY_EXEC
)
1767 args
.access
|= NFS4_ACCESS_LOOKUP
;
1769 if (mode
& MAY_WRITE
)
1770 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
;
1771 if (mode
& MAY_EXEC
)
1772 args
.access
|= NFS4_ACCESS_EXECUTE
;
1774 status
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
1777 if (res
.access
& NFS4_ACCESS_READ
)
1778 entry
->mask
|= MAY_READ
;
1779 if (res
.access
& (NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
))
1780 entry
->mask
|= MAY_WRITE
;
1781 if (res
.access
& (NFS4_ACCESS_LOOKUP
|NFS4_ACCESS_EXECUTE
))
1782 entry
->mask
|= MAY_EXEC
;
1787 static int nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
1789 struct nfs4_exception exception
= { };
1792 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1793 _nfs4_proc_access(inode
, entry
),
1795 } while (exception
.retry
);
1800 * TODO: For the time being, we don't try to get any attributes
1801 * along with any of the zero-copy operations READ, READDIR,
1804 * In the case of the first three, we want to put the GETATTR
1805 * after the read-type operation -- this is because it is hard
1806 * to predict the length of a GETATTR response in v4, and thus
1807 * align the READ data correctly. This means that the GETATTR
1808 * may end up partially falling into the page cache, and we should
1809 * shift it into the 'tail' of the xdr_buf before processing.
1810 * To do this efficiently, we need to know the total length
1811 * of data received, which doesn't seem to be available outside
1814 * In the case of WRITE, we also want to put the GETATTR after
1815 * the operation -- in this case because we want to make sure
1816 * we get the post-operation mtime and size. This means that
1817 * we can't use xdr_encode_pages() as written: we need a variant
1818 * of it which would leave room in the 'tail' iovec.
1820 * Both of these changes to the XDR layer would in fact be quite
1821 * minor, but I decided to leave them for a subsequent patch.
1823 static int _nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
1824 unsigned int pgbase
, unsigned int pglen
)
1826 struct nfs4_readlink args
= {
1827 .fh
= NFS_FH(inode
),
1832 struct rpc_message msg
= {
1833 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READLINK
],
1838 return rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
1841 static int nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
1842 unsigned int pgbase
, unsigned int pglen
)
1844 struct nfs4_exception exception
= { };
1847 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1848 _nfs4_proc_readlink(inode
, page
, pgbase
, pglen
),
1850 } while (exception
.retry
);
1856 * We will need to arrange for the VFS layer to provide an atomic open.
1857 * Until then, this create/open method is prone to inefficiency and race
1858 * conditions due to the lookup, create, and open VFS calls from sys_open()
1859 * placed on the wire.
1861 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1862 * The file will be opened again in the subsequent VFS open call
1863 * (nfs4_proc_file_open).
1865 * The open for read will just hang around to be used by any process that
1866 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1870 nfs4_proc_create(struct inode
*dir
, struct dentry
*dentry
, struct iattr
*sattr
,
1871 int flags
, struct nameidata
*nd
)
1873 struct path path
= {
1877 struct nfs4_state
*state
;
1878 struct rpc_cred
*cred
;
1881 cred
= rpcauth_lookupcred(NFS_CLIENT(dir
)->cl_auth
, 0);
1883 status
= PTR_ERR(cred
);
1886 state
= nfs4_do_open(dir
, &path
, flags
, sattr
, cred
);
1888 if (IS_ERR(state
)) {
1889 status
= PTR_ERR(state
);
1892 d_instantiate(dentry
, igrab(state
->inode
));
1893 if (flags
& O_EXCL
) {
1894 struct nfs_fattr fattr
;
1895 status
= nfs4_do_setattr(state
->inode
, &fattr
, sattr
, state
);
1897 nfs_setattr_update_inode(state
->inode
, sattr
);
1898 nfs_post_op_update_inode(state
->inode
, &fattr
);
1900 if (status
== 0 && (nd
->flags
& LOOKUP_OPEN
) != 0)
1901 status
= nfs4_intent_set_file(nd
, &path
, state
);
1903 nfs4_close_state(&path
, state
, flags
);
1908 static int _nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
1910 struct nfs_server
*server
= NFS_SERVER(dir
);
1911 struct nfs4_remove_arg args
= {
1914 .bitmask
= server
->attr_bitmask
,
1916 struct nfs_fattr dir_attr
;
1917 struct nfs4_remove_res res
= {
1919 .dir_attr
= &dir_attr
,
1921 struct rpc_message msg
= {
1922 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
],
1928 nfs_fattr_init(res
.dir_attr
);
1929 status
= rpc_call_sync(server
->client
, &msg
, 0);
1931 update_changeattr(dir
, &res
.cinfo
);
1932 nfs_post_op_update_inode(dir
, res
.dir_attr
);
1937 static int nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
1939 struct nfs4_exception exception
= { };
1942 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1943 _nfs4_proc_remove(dir
, name
),
1945 } while (exception
.retry
);
1949 struct unlink_desc
{
1950 struct nfs4_remove_arg args
;
1951 struct nfs4_remove_res res
;
1952 struct nfs_fattr dir_attr
;
1955 static int nfs4_proc_unlink_setup(struct rpc_message
*msg
, struct dentry
*dir
,
1958 struct nfs_server
*server
= NFS_SERVER(dir
->d_inode
);
1959 struct unlink_desc
*up
;
1961 up
= kmalloc(sizeof(*up
), GFP_KERNEL
);
1965 up
->args
.fh
= NFS_FH(dir
->d_inode
);
1966 up
->args
.name
= name
;
1967 up
->args
.bitmask
= server
->attr_bitmask
;
1968 up
->res
.server
= server
;
1969 up
->res
.dir_attr
= &up
->dir_attr
;
1971 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
];
1972 msg
->rpc_argp
= &up
->args
;
1973 msg
->rpc_resp
= &up
->res
;
1977 static int nfs4_proc_unlink_done(struct dentry
*dir
, struct rpc_task
*task
)
1979 struct rpc_message
*msg
= &task
->tk_msg
;
1980 struct unlink_desc
*up
;
1982 if (msg
->rpc_resp
!= NULL
) {
1983 up
= container_of(msg
->rpc_resp
, struct unlink_desc
, res
);
1984 update_changeattr(dir
->d_inode
, &up
->res
.cinfo
);
1985 nfs_post_op_update_inode(dir
->d_inode
, up
->res
.dir_attr
);
1987 msg
->rpc_resp
= NULL
;
1988 msg
->rpc_argp
= NULL
;
1993 static int _nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
1994 struct inode
*new_dir
, struct qstr
*new_name
)
1996 struct nfs_server
*server
= NFS_SERVER(old_dir
);
1997 struct nfs4_rename_arg arg
= {
1998 .old_dir
= NFS_FH(old_dir
),
1999 .new_dir
= NFS_FH(new_dir
),
2000 .old_name
= old_name
,
2001 .new_name
= new_name
,
2002 .bitmask
= server
->attr_bitmask
,
2004 struct nfs_fattr old_fattr
, new_fattr
;
2005 struct nfs4_rename_res res
= {
2007 .old_fattr
= &old_fattr
,
2008 .new_fattr
= &new_fattr
,
2010 struct rpc_message msg
= {
2011 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENAME
],
2017 nfs_fattr_init(res
.old_fattr
);
2018 nfs_fattr_init(res
.new_fattr
);
2019 status
= rpc_call_sync(server
->client
, &msg
, 0);
2022 update_changeattr(old_dir
, &res
.old_cinfo
);
2023 nfs_post_op_update_inode(old_dir
, res
.old_fattr
);
2024 update_changeattr(new_dir
, &res
.new_cinfo
);
2025 nfs_post_op_update_inode(new_dir
, res
.new_fattr
);
2030 static int nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2031 struct inode
*new_dir
, struct qstr
*new_name
)
2033 struct nfs4_exception exception
= { };
2036 err
= nfs4_handle_exception(NFS_SERVER(old_dir
),
2037 _nfs4_proc_rename(old_dir
, old_name
,
2040 } while (exception
.retry
);
2044 static int _nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2046 struct nfs_server
*server
= NFS_SERVER(inode
);
2047 struct nfs4_link_arg arg
= {
2048 .fh
= NFS_FH(inode
),
2049 .dir_fh
= NFS_FH(dir
),
2051 .bitmask
= server
->attr_bitmask
,
2053 struct nfs_fattr fattr
, dir_attr
;
2054 struct nfs4_link_res res
= {
2057 .dir_attr
= &dir_attr
,
2059 struct rpc_message msg
= {
2060 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LINK
],
2066 nfs_fattr_init(res
.fattr
);
2067 nfs_fattr_init(res
.dir_attr
);
2068 status
= rpc_call_sync(server
->client
, &msg
, 0);
2070 update_changeattr(dir
, &res
.cinfo
);
2071 nfs_post_op_update_inode(dir
, res
.dir_attr
);
2072 nfs_post_op_update_inode(inode
, res
.fattr
);
2078 static int nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2080 struct nfs4_exception exception
= { };
2083 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2084 _nfs4_proc_link(inode
, dir
, name
),
2086 } while (exception
.retry
);
2090 static int _nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2091 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2093 struct nfs_server
*server
= NFS_SERVER(dir
);
2094 struct nfs_fh fhandle
;
2095 struct nfs_fattr fattr
, dir_fattr
;
2096 struct nfs4_create_arg arg
= {
2097 .dir_fh
= NFS_FH(dir
),
2099 .name
= &dentry
->d_name
,
2102 .bitmask
= server
->attr_bitmask
,
2104 struct nfs4_create_res res
= {
2108 .dir_fattr
= &dir_fattr
,
2110 struct rpc_message msg
= {
2111 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SYMLINK
],
2117 if (len
> NFS4_MAXPATHLEN
)
2118 return -ENAMETOOLONG
;
2120 arg
.u
.symlink
.pages
= &page
;
2121 arg
.u
.symlink
.len
= len
;
2122 nfs_fattr_init(&fattr
);
2123 nfs_fattr_init(&dir_fattr
);
2125 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
2127 update_changeattr(dir
, &res
.dir_cinfo
);
2128 nfs_post_op_update_inode(dir
, res
.dir_fattr
);
2129 status
= nfs_instantiate(dentry
, &fhandle
, &fattr
);
2134 static int nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2135 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2137 struct nfs4_exception exception
= { };
2140 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2141 _nfs4_proc_symlink(dir
, dentry
, page
,
2144 } while (exception
.retry
);
2148 static int _nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2149 struct iattr
*sattr
)
2151 struct nfs_server
*server
= NFS_SERVER(dir
);
2152 struct nfs_fh fhandle
;
2153 struct nfs_fattr fattr
, dir_fattr
;
2154 struct nfs4_create_arg arg
= {
2155 .dir_fh
= NFS_FH(dir
),
2157 .name
= &dentry
->d_name
,
2160 .bitmask
= server
->attr_bitmask
,
2162 struct nfs4_create_res res
= {
2166 .dir_fattr
= &dir_fattr
,
2168 struct rpc_message msg
= {
2169 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
],
2175 nfs_fattr_init(&fattr
);
2176 nfs_fattr_init(&dir_fattr
);
2178 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
2180 update_changeattr(dir
, &res
.dir_cinfo
);
2181 nfs_post_op_update_inode(dir
, res
.dir_fattr
);
2182 status
= nfs_instantiate(dentry
, &fhandle
, &fattr
);
2187 static int nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2188 struct iattr
*sattr
)
2190 struct nfs4_exception exception
= { };
2193 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2194 _nfs4_proc_mkdir(dir
, dentry
, sattr
),
2196 } while (exception
.retry
);
2200 static int _nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2201 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2203 struct inode
*dir
= dentry
->d_inode
;
2204 struct nfs4_readdir_arg args
= {
2209 .bitmask
= NFS_SERVER(dentry
->d_inode
)->attr_bitmask
,
2211 struct nfs4_readdir_res res
;
2212 struct rpc_message msg
= {
2213 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READDIR
],
2220 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__
,
2221 dentry
->d_parent
->d_name
.name
,
2222 dentry
->d_name
.name
,
2223 (unsigned long long)cookie
);
2224 nfs4_setup_readdir(cookie
, NFS_COOKIEVERF(dir
), dentry
, &args
);
2225 res
.pgbase
= args
.pgbase
;
2226 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
2228 memcpy(NFS_COOKIEVERF(dir
), res
.verifier
.data
, NFS4_VERIFIER_SIZE
);
2229 dprintk("%s: returns %d\n", __FUNCTION__
, status
);
2233 static int nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2234 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2236 struct nfs4_exception exception
= { };
2239 err
= nfs4_handle_exception(NFS_SERVER(dentry
->d_inode
),
2240 _nfs4_proc_readdir(dentry
, cred
, cookie
,
2243 } while (exception
.retry
);
2247 static int _nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2248 struct iattr
*sattr
, dev_t rdev
)
2250 struct nfs_server
*server
= NFS_SERVER(dir
);
2252 struct nfs_fattr fattr
, dir_fattr
;
2253 struct nfs4_create_arg arg
= {
2254 .dir_fh
= NFS_FH(dir
),
2256 .name
= &dentry
->d_name
,
2258 .bitmask
= server
->attr_bitmask
,
2260 struct nfs4_create_res res
= {
2264 .dir_fattr
= &dir_fattr
,
2266 struct rpc_message msg
= {
2267 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
],
2272 int mode
= sattr
->ia_mode
;
2274 nfs_fattr_init(&fattr
);
2275 nfs_fattr_init(&dir_fattr
);
2277 BUG_ON(!(sattr
->ia_valid
& ATTR_MODE
));
2278 BUG_ON(!S_ISFIFO(mode
) && !S_ISBLK(mode
) && !S_ISCHR(mode
) && !S_ISSOCK(mode
));
2280 arg
.ftype
= NF4FIFO
;
2281 else if (S_ISBLK(mode
)) {
2283 arg
.u
.device
.specdata1
= MAJOR(rdev
);
2284 arg
.u
.device
.specdata2
= MINOR(rdev
);
2286 else if (S_ISCHR(mode
)) {
2288 arg
.u
.device
.specdata1
= MAJOR(rdev
);
2289 arg
.u
.device
.specdata2
= MINOR(rdev
);
2292 arg
.ftype
= NF4SOCK
;
2294 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
2296 update_changeattr(dir
, &res
.dir_cinfo
);
2297 nfs_post_op_update_inode(dir
, res
.dir_fattr
);
2298 status
= nfs_instantiate(dentry
, &fh
, &fattr
);
2303 static int nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2304 struct iattr
*sattr
, dev_t rdev
)
2306 struct nfs4_exception exception
= { };
2309 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2310 _nfs4_proc_mknod(dir
, dentry
, sattr
, rdev
),
2312 } while (exception
.retry
);
2316 static int _nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2317 struct nfs_fsstat
*fsstat
)
2319 struct nfs4_statfs_arg args
= {
2321 .bitmask
= server
->attr_bitmask
,
2323 struct rpc_message msg
= {
2324 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_STATFS
],
2329 nfs_fattr_init(fsstat
->fattr
);
2330 return rpc_call_sync(server
->client
, &msg
, 0);
2333 static int nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsstat
*fsstat
)
2335 struct nfs4_exception exception
= { };
2338 err
= nfs4_handle_exception(server
,
2339 _nfs4_proc_statfs(server
, fhandle
, fsstat
),
2341 } while (exception
.retry
);
2345 static int _nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2346 struct nfs_fsinfo
*fsinfo
)
2348 struct nfs4_fsinfo_arg args
= {
2350 .bitmask
= server
->attr_bitmask
,
2352 struct rpc_message msg
= {
2353 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FSINFO
],
2358 return rpc_call_sync(server
->client
, &msg
, 0);
2361 static int nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2363 struct nfs4_exception exception
= { };
2367 err
= nfs4_handle_exception(server
,
2368 _nfs4_do_fsinfo(server
, fhandle
, fsinfo
),
2370 } while (exception
.retry
);
2374 static int nfs4_proc_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2376 nfs_fattr_init(fsinfo
->fattr
);
2377 return nfs4_do_fsinfo(server
, fhandle
, fsinfo
);
2380 static int _nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2381 struct nfs_pathconf
*pathconf
)
2383 struct nfs4_pathconf_arg args
= {
2385 .bitmask
= server
->attr_bitmask
,
2387 struct rpc_message msg
= {
2388 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_PATHCONF
],
2390 .rpc_resp
= pathconf
,
2393 /* None of the pathconf attributes are mandatory to implement */
2394 if ((args
.bitmask
[0] & nfs4_pathconf_bitmap
[0]) == 0) {
2395 memset(pathconf
, 0, sizeof(*pathconf
));
2399 nfs_fattr_init(pathconf
->fattr
);
2400 return rpc_call_sync(server
->client
, &msg
, 0);
2403 static int nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2404 struct nfs_pathconf
*pathconf
)
2406 struct nfs4_exception exception
= { };
2410 err
= nfs4_handle_exception(server
,
2411 _nfs4_proc_pathconf(server
, fhandle
, pathconf
),
2413 } while (exception
.retry
);
2417 static int nfs4_read_done(struct rpc_task
*task
, struct nfs_read_data
*data
)
2419 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2421 if (nfs4_async_handle_error(task
, server
) == -EAGAIN
) {
2422 rpc_restart_call(task
);
2425 if (task
->tk_status
> 0)
2426 renew_lease(server
, data
->timestamp
);
2430 static void nfs4_proc_read_setup(struct nfs_read_data
*data
)
2432 struct rpc_message msg
= {
2433 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READ
],
2434 .rpc_argp
= &data
->args
,
2435 .rpc_resp
= &data
->res
,
2436 .rpc_cred
= data
->cred
,
2439 data
->timestamp
= jiffies
;
2441 rpc_call_setup(&data
->task
, &msg
, 0);
2444 static int nfs4_write_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
2446 struct inode
*inode
= data
->inode
;
2448 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
)) == -EAGAIN
) {
2449 rpc_restart_call(task
);
2452 if (task
->tk_status
>= 0) {
2453 renew_lease(NFS_SERVER(inode
), data
->timestamp
);
2454 nfs_post_op_update_inode(inode
, data
->res
.fattr
);
2459 static void nfs4_proc_write_setup(struct nfs_write_data
*data
, int how
)
2461 struct rpc_message msg
= {
2462 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_WRITE
],
2463 .rpc_argp
= &data
->args
,
2464 .rpc_resp
= &data
->res
,
2465 .rpc_cred
= data
->cred
,
2467 struct inode
*inode
= data
->inode
;
2468 struct nfs_server
*server
= NFS_SERVER(inode
);
2471 if (how
& FLUSH_STABLE
) {
2472 if (!NFS_I(inode
)->ncommit
)
2473 stable
= NFS_FILE_SYNC
;
2475 stable
= NFS_DATA_SYNC
;
2477 stable
= NFS_UNSTABLE
;
2478 data
->args
.stable
= stable
;
2479 data
->args
.bitmask
= server
->attr_bitmask
;
2480 data
->res
.server
= server
;
2482 data
->timestamp
= jiffies
;
2484 /* Finalize the task. */
2485 rpc_call_setup(&data
->task
, &msg
, 0);
2488 static int nfs4_commit_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
2490 struct inode
*inode
= data
->inode
;
2492 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
)) == -EAGAIN
) {
2493 rpc_restart_call(task
);
2496 if (task
->tk_status
>= 0)
2497 nfs_post_op_update_inode(inode
, data
->res
.fattr
);
2501 static void nfs4_proc_commit_setup(struct nfs_write_data
*data
, int how
)
2503 struct rpc_message msg
= {
2504 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_COMMIT
],
2505 .rpc_argp
= &data
->args
,
2506 .rpc_resp
= &data
->res
,
2507 .rpc_cred
= data
->cred
,
2509 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2511 data
->args
.bitmask
= server
->attr_bitmask
;
2512 data
->res
.server
= server
;
2514 rpc_call_setup(&data
->task
, &msg
, 0);
2518 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2519 * standalone procedure for queueing an asynchronous RENEW.
2521 static void nfs4_renew_done(struct rpc_task
*task
, void *data
)
2523 struct nfs_client
*clp
= (struct nfs_client
*)task
->tk_msg
.rpc_argp
;
2524 unsigned long timestamp
= (unsigned long)data
;
2526 if (task
->tk_status
< 0) {
2527 switch (task
->tk_status
) {
2528 case -NFS4ERR_STALE_CLIENTID
:
2529 case -NFS4ERR_EXPIRED
:
2530 case -NFS4ERR_CB_PATH_DOWN
:
2531 nfs4_schedule_state_recovery(clp
);
2535 spin_lock(&clp
->cl_lock
);
2536 if (time_before(clp
->cl_last_renewal
,timestamp
))
2537 clp
->cl_last_renewal
= timestamp
;
2538 spin_unlock(&clp
->cl_lock
);
2541 static const struct rpc_call_ops nfs4_renew_ops
= {
2542 .rpc_call_done
= nfs4_renew_done
,
2545 int nfs4_proc_async_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2547 struct rpc_message msg
= {
2548 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2553 return rpc_call_async(clp
->cl_rpcclient
, &msg
, RPC_TASK_SOFT
,
2554 &nfs4_renew_ops
, (void *)jiffies
);
2557 int nfs4_proc_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2559 struct rpc_message msg
= {
2560 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2564 unsigned long now
= jiffies
;
2567 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2570 spin_lock(&clp
->cl_lock
);
2571 if (time_before(clp
->cl_last_renewal
,now
))
2572 clp
->cl_last_renewal
= now
;
2573 spin_unlock(&clp
->cl_lock
);
2577 static inline int nfs4_server_supports_acls(struct nfs_server
*server
)
2579 return (server
->caps
& NFS_CAP_ACLS
)
2580 && (server
->acl_bitmask
& ACL4_SUPPORT_ALLOW_ACL
)
2581 && (server
->acl_bitmask
& ACL4_SUPPORT_DENY_ACL
);
2584 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2585 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2588 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2590 static void buf_to_pages(const void *buf
, size_t buflen
,
2591 struct page
**pages
, unsigned int *pgbase
)
2593 const void *p
= buf
;
2595 *pgbase
= offset_in_page(buf
);
2597 while (p
< buf
+ buflen
) {
2598 *(pages
++) = virt_to_page(p
);
2599 p
+= PAGE_CACHE_SIZE
;
2603 struct nfs4_cached_acl
{
2609 static void nfs4_set_cached_acl(struct inode
*inode
, struct nfs4_cached_acl
*acl
)
2611 struct nfs_inode
*nfsi
= NFS_I(inode
);
2613 spin_lock(&inode
->i_lock
);
2614 kfree(nfsi
->nfs4_acl
);
2615 nfsi
->nfs4_acl
= acl
;
2616 spin_unlock(&inode
->i_lock
);
2619 static void nfs4_zap_acl_attr(struct inode
*inode
)
2621 nfs4_set_cached_acl(inode
, NULL
);
2624 static inline ssize_t
nfs4_read_cached_acl(struct inode
*inode
, char *buf
, size_t buflen
)
2626 struct nfs_inode
*nfsi
= NFS_I(inode
);
2627 struct nfs4_cached_acl
*acl
;
2630 spin_lock(&inode
->i_lock
);
2631 acl
= nfsi
->nfs4_acl
;
2634 if (buf
== NULL
) /* user is just asking for length */
2636 if (acl
->cached
== 0)
2638 ret
= -ERANGE
; /* see getxattr(2) man page */
2639 if (acl
->len
> buflen
)
2641 memcpy(buf
, acl
->data
, acl
->len
);
2645 spin_unlock(&inode
->i_lock
);
2649 static void nfs4_write_cached_acl(struct inode
*inode
, const char *buf
, size_t acl_len
)
2651 struct nfs4_cached_acl
*acl
;
2653 if (buf
&& acl_len
<= PAGE_SIZE
) {
2654 acl
= kmalloc(sizeof(*acl
) + acl_len
, GFP_KERNEL
);
2658 memcpy(acl
->data
, buf
, acl_len
);
2660 acl
= kmalloc(sizeof(*acl
), GFP_KERNEL
);
2667 nfs4_set_cached_acl(inode
, acl
);
2670 static ssize_t
__nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
2672 struct page
*pages
[NFS4ACL_MAXPAGES
];
2673 struct nfs_getaclargs args
= {
2674 .fh
= NFS_FH(inode
),
2678 size_t resp_len
= buflen
;
2680 struct rpc_message msg
= {
2681 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETACL
],
2683 .rpc_resp
= &resp_len
,
2685 struct page
*localpage
= NULL
;
2688 if (buflen
< PAGE_SIZE
) {
2689 /* As long as we're doing a round trip to the server anyway,
2690 * let's be prepared for a page of acl data. */
2691 localpage
= alloc_page(GFP_KERNEL
);
2692 resp_buf
= page_address(localpage
);
2693 if (localpage
== NULL
)
2695 args
.acl_pages
[0] = localpage
;
2696 args
.acl_pgbase
= 0;
2697 resp_len
= args
.acl_len
= PAGE_SIZE
;
2700 buf_to_pages(buf
, buflen
, args
.acl_pages
, &args
.acl_pgbase
);
2702 ret
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
2705 if (resp_len
> args
.acl_len
)
2706 nfs4_write_cached_acl(inode
, NULL
, resp_len
);
2708 nfs4_write_cached_acl(inode
, resp_buf
, resp_len
);
2711 if (resp_len
> buflen
)
2714 memcpy(buf
, resp_buf
, resp_len
);
2719 __free_page(localpage
);
2723 static ssize_t
nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
2725 struct nfs4_exception exception
= { };
2728 ret
= __nfs4_get_acl_uncached(inode
, buf
, buflen
);
2731 ret
= nfs4_handle_exception(NFS_SERVER(inode
), ret
, &exception
);
2732 } while (exception
.retry
);
2736 static ssize_t
nfs4_proc_get_acl(struct inode
*inode
, void *buf
, size_t buflen
)
2738 struct nfs_server
*server
= NFS_SERVER(inode
);
2741 if (!nfs4_server_supports_acls(server
))
2743 ret
= nfs_revalidate_inode(server
, inode
);
2746 ret
= nfs4_read_cached_acl(inode
, buf
, buflen
);
2749 return nfs4_get_acl_uncached(inode
, buf
, buflen
);
2752 static int __nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
2754 struct nfs_server
*server
= NFS_SERVER(inode
);
2755 struct page
*pages
[NFS4ACL_MAXPAGES
];
2756 struct nfs_setaclargs arg
= {
2757 .fh
= NFS_FH(inode
),
2761 struct rpc_message msg
= {
2762 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETACL
],
2768 if (!nfs4_server_supports_acls(server
))
2770 nfs_inode_return_delegation(inode
);
2771 buf_to_pages(buf
, buflen
, arg
.acl_pages
, &arg
.acl_pgbase
);
2772 ret
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
2773 nfs_zap_caches(inode
);
2777 static int nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
2779 struct nfs4_exception exception
= { };
2782 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2783 __nfs4_proc_set_acl(inode
, buf
, buflen
),
2785 } while (exception
.retry
);
2790 nfs4_async_handle_error(struct rpc_task
*task
, const struct nfs_server
*server
)
2792 struct nfs_client
*clp
= server
->nfs_client
;
2794 if (!clp
|| task
->tk_status
>= 0)
2796 switch(task
->tk_status
) {
2797 case -NFS4ERR_STALE_CLIENTID
:
2798 case -NFS4ERR_STALE_STATEID
:
2799 case -NFS4ERR_EXPIRED
:
2800 rpc_sleep_on(&clp
->cl_rpcwaitq
, task
, NULL
, NULL
);
2801 nfs4_schedule_state_recovery(clp
);
2802 if (test_bit(NFS4CLNT_STATE_RECOVER
, &clp
->cl_state
) == 0)
2803 rpc_wake_up_task(task
);
2804 task
->tk_status
= 0;
2806 case -NFS4ERR_DELAY
:
2807 nfs_inc_server_stats((struct nfs_server
*) server
,
2809 case -NFS4ERR_GRACE
:
2810 rpc_delay(task
, NFS4_POLL_RETRY_MAX
);
2811 task
->tk_status
= 0;
2813 case -NFS4ERR_OLD_STATEID
:
2814 task
->tk_status
= 0;
2817 task
->tk_status
= nfs4_map_errors(task
->tk_status
);
2821 static int nfs4_wait_bit_interruptible(void *word
)
2823 if (signal_pending(current
))
2824 return -ERESTARTSYS
;
2829 static int nfs4_wait_clnt_recover(struct rpc_clnt
*clnt
, struct nfs_client
*clp
)
2836 rwsem_acquire(&clp
->cl_sem
.dep_map
, 0, 0, _RET_IP_
);
2838 rpc_clnt_sigmask(clnt
, &oldset
);
2839 res
= wait_on_bit(&clp
->cl_state
, NFS4CLNT_STATE_RECOVER
,
2840 nfs4_wait_bit_interruptible
,
2841 TASK_INTERRUPTIBLE
);
2842 rpc_clnt_sigunmask(clnt
, &oldset
);
2844 rwsem_release(&clp
->cl_sem
.dep_map
, 1, _RET_IP_
);
2848 static int nfs4_delay(struct rpc_clnt
*clnt
, long *timeout
)
2856 *timeout
= NFS4_POLL_RETRY_MIN
;
2857 if (*timeout
> NFS4_POLL_RETRY_MAX
)
2858 *timeout
= NFS4_POLL_RETRY_MAX
;
2859 rpc_clnt_sigmask(clnt
, &oldset
);
2860 if (clnt
->cl_intr
) {
2861 schedule_timeout_interruptible(*timeout
);
2865 schedule_timeout_uninterruptible(*timeout
);
2866 rpc_clnt_sigunmask(clnt
, &oldset
);
2871 /* This is the error handling routine for processes that are allowed
2874 static int nfs4_handle_exception(const struct nfs_server
*server
, int errorcode
, struct nfs4_exception
*exception
)
2876 struct nfs_client
*clp
= server
->nfs_client
;
2877 int ret
= errorcode
;
2879 exception
->retry
= 0;
2883 case -NFS4ERR_STALE_CLIENTID
:
2884 case -NFS4ERR_STALE_STATEID
:
2885 case -NFS4ERR_EXPIRED
:
2886 nfs4_schedule_state_recovery(clp
);
2887 ret
= nfs4_wait_clnt_recover(server
->client
, clp
);
2889 exception
->retry
= 1;
2891 case -NFS4ERR_FILE_OPEN
:
2892 case -NFS4ERR_GRACE
:
2893 case -NFS4ERR_DELAY
:
2894 ret
= nfs4_delay(server
->client
, &exception
->timeout
);
2897 case -NFS4ERR_OLD_STATEID
:
2898 exception
->retry
= 1;
2900 /* We failed to handle the error */
2901 return nfs4_map_errors(ret
);
2904 int nfs4_proc_setclientid(struct nfs_client
*clp
, u32 program
, unsigned short port
, struct rpc_cred
*cred
)
2906 nfs4_verifier sc_verifier
;
2907 struct nfs4_setclientid setclientid
= {
2908 .sc_verifier
= &sc_verifier
,
2911 struct rpc_message msg
= {
2912 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID
],
2913 .rpc_argp
= &setclientid
,
2921 p
= (__be32
*)sc_verifier
.data
;
2922 *p
++ = htonl((u32
)clp
->cl_boot_time
.tv_sec
);
2923 *p
= htonl((u32
)clp
->cl_boot_time
.tv_nsec
);
2926 setclientid
.sc_name_len
= scnprintf(setclientid
.sc_name
,
2927 sizeof(setclientid
.sc_name
), "%s/%u.%u.%u.%u %s %u",
2928 clp
->cl_ipaddr
, NIPQUAD(clp
->cl_addr
.sin_addr
),
2929 cred
->cr_ops
->cr_name
,
2930 clp
->cl_id_uniquifier
);
2931 setclientid
.sc_netid_len
= scnprintf(setclientid
.sc_netid
,
2932 sizeof(setclientid
.sc_netid
), "tcp");
2933 setclientid
.sc_uaddr_len
= scnprintf(setclientid
.sc_uaddr
,
2934 sizeof(setclientid
.sc_uaddr
), "%s.%d.%d",
2935 clp
->cl_ipaddr
, port
>> 8, port
& 255);
2937 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2938 if (status
!= -NFS4ERR_CLID_INUSE
)
2943 ssleep(clp
->cl_lease_time
+ 1);
2945 if (++clp
->cl_id_uniquifier
== 0)
2951 static int _nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2953 struct nfs_fsinfo fsinfo
;
2954 struct rpc_message msg
= {
2955 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID_CONFIRM
],
2957 .rpc_resp
= &fsinfo
,
2964 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2966 spin_lock(&clp
->cl_lock
);
2967 clp
->cl_lease_time
= fsinfo
.lease_time
* HZ
;
2968 clp
->cl_last_renewal
= now
;
2969 clear_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
2970 spin_unlock(&clp
->cl_lock
);
2975 int nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2980 err
= _nfs4_proc_setclientid_confirm(clp
, cred
);
2984 case -NFS4ERR_RESOURCE
:
2985 /* The IBM lawyers misread another document! */
2986 case -NFS4ERR_DELAY
:
2987 err
= nfs4_delay(clp
->cl_rpcclient
, &timeout
);
2993 struct nfs4_delegreturndata
{
2994 struct nfs4_delegreturnargs args
;
2995 struct nfs4_delegreturnres res
;
2997 nfs4_stateid stateid
;
2998 struct rpc_cred
*cred
;
2999 unsigned long timestamp
;
3000 struct nfs_fattr fattr
;
3004 static void nfs4_delegreturn_prepare(struct rpc_task
*task
, void *calldata
)
3006 struct nfs4_delegreturndata
*data
= calldata
;
3007 struct rpc_message msg
= {
3008 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DELEGRETURN
],
3009 .rpc_argp
= &data
->args
,
3010 .rpc_resp
= &data
->res
,
3011 .rpc_cred
= data
->cred
,
3013 nfs_fattr_init(data
->res
.fattr
);
3014 rpc_call_setup(task
, &msg
, 0);
3017 static void nfs4_delegreturn_done(struct rpc_task
*task
, void *calldata
)
3019 struct nfs4_delegreturndata
*data
= calldata
;
3020 data
->rpc_status
= task
->tk_status
;
3021 if (data
->rpc_status
== 0)
3022 renew_lease(data
->res
.server
, data
->timestamp
);
3025 static void nfs4_delegreturn_release(void *calldata
)
3027 struct nfs4_delegreturndata
*data
= calldata
;
3029 put_rpccred(data
->cred
);
3033 static const struct rpc_call_ops nfs4_delegreturn_ops
= {
3034 .rpc_call_prepare
= nfs4_delegreturn_prepare
,
3035 .rpc_call_done
= nfs4_delegreturn_done
,
3036 .rpc_release
= nfs4_delegreturn_release
,
3039 static int _nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
)
3041 struct nfs4_delegreturndata
*data
;
3042 struct nfs_server
*server
= NFS_SERVER(inode
);
3043 struct rpc_task
*task
;
3046 data
= kmalloc(sizeof(*data
), GFP_KERNEL
);
3049 data
->args
.fhandle
= &data
->fh
;
3050 data
->args
.stateid
= &data
->stateid
;
3051 data
->args
.bitmask
= server
->attr_bitmask
;
3052 nfs_copy_fh(&data
->fh
, NFS_FH(inode
));
3053 memcpy(&data
->stateid
, stateid
, sizeof(data
->stateid
));
3054 data
->res
.fattr
= &data
->fattr
;
3055 data
->res
.server
= server
;
3056 data
->cred
= get_rpccred(cred
);
3057 data
->timestamp
= jiffies
;
3058 data
->rpc_status
= 0;
3060 task
= rpc_run_task(NFS_CLIENT(inode
), RPC_TASK_ASYNC
, &nfs4_delegreturn_ops
, data
);
3062 return PTR_ERR(task
);
3063 status
= nfs4_wait_for_completion_rpc_task(task
);
3065 status
= data
->rpc_status
;
3067 nfs_post_op_update_inode(inode
, &data
->fattr
);
3073 int nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
)
3075 struct nfs_server
*server
= NFS_SERVER(inode
);
3076 struct nfs4_exception exception
= { };
3079 err
= _nfs4_proc_delegreturn(inode
, cred
, stateid
);
3081 case -NFS4ERR_STALE_STATEID
:
3082 case -NFS4ERR_EXPIRED
:
3086 err
= nfs4_handle_exception(server
, err
, &exception
);
3087 } while (exception
.retry
);
3091 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3092 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3095 * sleep, with exponential backoff, and retry the LOCK operation.
3097 static unsigned long
3098 nfs4_set_lock_task_retry(unsigned long timeout
)
3100 schedule_timeout_interruptible(timeout
);
3102 if (timeout
> NFS4_LOCK_MAXTIMEOUT
)
3103 return NFS4_LOCK_MAXTIMEOUT
;
3107 static int _nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3109 struct inode
*inode
= state
->inode
;
3110 struct nfs_server
*server
= NFS_SERVER(inode
);
3111 struct nfs_client
*clp
= server
->nfs_client
;
3112 struct nfs_lockt_args arg
= {
3113 .fh
= NFS_FH(inode
),
3116 struct nfs_lockt_res res
= {
3119 struct rpc_message msg
= {
3120 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKT
],
3123 .rpc_cred
= state
->owner
->so_cred
,
3125 struct nfs4_lock_state
*lsp
;
3128 down_read(&clp
->cl_sem
);
3129 arg
.lock_owner
.clientid
= clp
->cl_clientid
;
3130 status
= nfs4_set_lock_state(state
, request
);
3133 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3134 arg
.lock_owner
.id
= lsp
->ls_id
.id
;
3135 status
= rpc_call_sync(server
->client
, &msg
, 0);
3138 request
->fl_type
= F_UNLCK
;
3140 case -NFS4ERR_DENIED
:
3143 request
->fl_ops
->fl_release_private(request
);
3145 up_read(&clp
->cl_sem
);
3149 static int nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3151 struct nfs4_exception exception
= { };
3155 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3156 _nfs4_proc_getlk(state
, cmd
, request
),
3158 } while (exception
.retry
);
3162 static int do_vfs_lock(struct file
*file
, struct file_lock
*fl
)
3165 switch (fl
->fl_flags
& (FL_POSIX
|FL_FLOCK
)) {
3167 res
= posix_lock_file_wait(file
, fl
);
3170 res
= flock_lock_file_wait(file
, fl
);
3178 struct nfs4_unlockdata
{
3179 struct nfs_locku_args arg
;
3180 struct nfs_locku_res res
;
3181 struct nfs4_lock_state
*lsp
;
3182 struct nfs_open_context
*ctx
;
3183 struct file_lock fl
;
3184 const struct nfs_server
*server
;
3185 unsigned long timestamp
;
3188 static struct nfs4_unlockdata
*nfs4_alloc_unlockdata(struct file_lock
*fl
,
3189 struct nfs_open_context
*ctx
,
3190 struct nfs4_lock_state
*lsp
,
3191 struct nfs_seqid
*seqid
)
3193 struct nfs4_unlockdata
*p
;
3194 struct inode
*inode
= lsp
->ls_state
->inode
;
3196 p
= kmalloc(sizeof(*p
), GFP_KERNEL
);
3199 p
->arg
.fh
= NFS_FH(inode
);
3201 p
->arg
.seqid
= seqid
;
3202 p
->arg
.stateid
= &lsp
->ls_stateid
;
3204 atomic_inc(&lsp
->ls_count
);
3205 /* Ensure we don't close file until we're done freeing locks! */
3206 p
->ctx
= get_nfs_open_context(ctx
);
3207 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3208 p
->server
= NFS_SERVER(inode
);
3212 static void nfs4_locku_release_calldata(void *data
)
3214 struct nfs4_unlockdata
*calldata
= data
;
3215 nfs_free_seqid(calldata
->arg
.seqid
);
3216 nfs4_put_lock_state(calldata
->lsp
);
3217 put_nfs_open_context(calldata
->ctx
);
3221 static void nfs4_locku_done(struct rpc_task
*task
, void *data
)
3223 struct nfs4_unlockdata
*calldata
= data
;
3225 if (RPC_ASSASSINATED(task
))
3227 nfs_increment_lock_seqid(task
->tk_status
, calldata
->arg
.seqid
);
3228 switch (task
->tk_status
) {
3230 memcpy(calldata
->lsp
->ls_stateid
.data
,
3231 calldata
->res
.stateid
.data
,
3232 sizeof(calldata
->lsp
->ls_stateid
.data
));
3233 renew_lease(calldata
->server
, calldata
->timestamp
);
3235 case -NFS4ERR_STALE_STATEID
:
3236 case -NFS4ERR_EXPIRED
:
3239 if (nfs4_async_handle_error(task
, calldata
->server
) == -EAGAIN
)
3240 rpc_restart_call(task
);
3244 static void nfs4_locku_prepare(struct rpc_task
*task
, void *data
)
3246 struct nfs4_unlockdata
*calldata
= data
;
3247 struct rpc_message msg
= {
3248 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKU
],
3249 .rpc_argp
= &calldata
->arg
,
3250 .rpc_resp
= &calldata
->res
,
3251 .rpc_cred
= calldata
->lsp
->ls_state
->owner
->so_cred
,
3254 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
3256 if ((calldata
->lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) == 0) {
3257 /* Note: exit _without_ running nfs4_locku_done */
3258 task
->tk_action
= NULL
;
3261 calldata
->timestamp
= jiffies
;
3262 rpc_call_setup(task
, &msg
, 0);
3265 static const struct rpc_call_ops nfs4_locku_ops
= {
3266 .rpc_call_prepare
= nfs4_locku_prepare
,
3267 .rpc_call_done
= nfs4_locku_done
,
3268 .rpc_release
= nfs4_locku_release_calldata
,
3271 static struct rpc_task
*nfs4_do_unlck(struct file_lock
*fl
,
3272 struct nfs_open_context
*ctx
,
3273 struct nfs4_lock_state
*lsp
,
3274 struct nfs_seqid
*seqid
)
3276 struct nfs4_unlockdata
*data
;
3278 /* Ensure this is an unlock - when canceling a lock, the
3279 * canceled lock is passed in, and it won't be an unlock.
3281 fl
->fl_type
= F_UNLCK
;
3283 data
= nfs4_alloc_unlockdata(fl
, ctx
, lsp
, seqid
);
3285 nfs_free_seqid(seqid
);
3286 return ERR_PTR(-ENOMEM
);
3289 return rpc_run_task(NFS_CLIENT(lsp
->ls_state
->inode
), RPC_TASK_ASYNC
, &nfs4_locku_ops
, data
);
3292 static int nfs4_proc_unlck(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3294 struct nfs_seqid
*seqid
;
3295 struct nfs4_lock_state
*lsp
;
3296 struct rpc_task
*task
;
3299 status
= nfs4_set_lock_state(state
, request
);
3300 /* Unlock _before_ we do the RPC call */
3301 request
->fl_flags
|= FL_EXISTS
;
3302 if (do_vfs_lock(request
->fl_file
, request
) == -ENOENT
)
3306 /* Is this a delegated lock? */
3307 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
3309 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3310 seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3314 task
= nfs4_do_unlck(request
, request
->fl_file
->private_data
, lsp
, seqid
);
3315 status
= PTR_ERR(task
);
3318 status
= nfs4_wait_for_completion_rpc_task(task
);
3324 struct nfs4_lockdata
{
3325 struct nfs_lock_args arg
;
3326 struct nfs_lock_res res
;
3327 struct nfs4_lock_state
*lsp
;
3328 struct nfs_open_context
*ctx
;
3329 struct file_lock fl
;
3330 unsigned long timestamp
;
3335 static struct nfs4_lockdata
*nfs4_alloc_lockdata(struct file_lock
*fl
,
3336 struct nfs_open_context
*ctx
, struct nfs4_lock_state
*lsp
)
3338 struct nfs4_lockdata
*p
;
3339 struct inode
*inode
= lsp
->ls_state
->inode
;
3340 struct nfs_server
*server
= NFS_SERVER(inode
);
3342 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
3346 p
->arg
.fh
= NFS_FH(inode
);
3348 p
->arg
.lock_seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3349 if (p
->arg
.lock_seqid
== NULL
)
3351 p
->arg
.lock_stateid
= &lsp
->ls_stateid
;
3352 p
->arg
.lock_owner
.clientid
= server
->nfs_client
->cl_clientid
;
3353 p
->arg
.lock_owner
.id
= lsp
->ls_id
.id
;
3355 atomic_inc(&lsp
->ls_count
);
3356 p
->ctx
= get_nfs_open_context(ctx
);
3357 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3364 static void nfs4_lock_prepare(struct rpc_task
*task
, void *calldata
)
3366 struct nfs4_lockdata
*data
= calldata
;
3367 struct nfs4_state
*state
= data
->lsp
->ls_state
;
3368 struct nfs4_state_owner
*sp
= state
->owner
;
3369 struct rpc_message msg
= {
3370 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCK
],
3371 .rpc_argp
= &data
->arg
,
3372 .rpc_resp
= &data
->res
,
3373 .rpc_cred
= sp
->so_cred
,
3376 if (nfs_wait_on_sequence(data
->arg
.lock_seqid
, task
) != 0)
3378 dprintk("%s: begin!\n", __FUNCTION__
);
3379 /* Do we need to do an open_to_lock_owner? */
3380 if (!(data
->arg
.lock_seqid
->sequence
->flags
& NFS_SEQID_CONFIRMED
)) {
3381 data
->arg
.open_seqid
= nfs_alloc_seqid(&sp
->so_seqid
);
3382 if (data
->arg
.open_seqid
== NULL
) {
3383 data
->rpc_status
= -ENOMEM
;
3384 task
->tk_action
= NULL
;
3387 data
->arg
.open_stateid
= &state
->stateid
;
3388 data
->arg
.new_lock_owner
= 1;
3390 data
->timestamp
= jiffies
;
3391 rpc_call_setup(task
, &msg
, 0);
3393 dprintk("%s: done!, ret = %d\n", __FUNCTION__
, data
->rpc_status
);
3396 static void nfs4_lock_done(struct rpc_task
*task
, void *calldata
)
3398 struct nfs4_lockdata
*data
= calldata
;
3400 dprintk("%s: begin!\n", __FUNCTION__
);
3402 data
->rpc_status
= task
->tk_status
;
3403 if (RPC_ASSASSINATED(task
))
3405 if (data
->arg
.new_lock_owner
!= 0) {
3406 nfs_increment_open_seqid(data
->rpc_status
, data
->arg
.open_seqid
);
3407 if (data
->rpc_status
== 0)
3408 nfs_confirm_seqid(&data
->lsp
->ls_seqid
, 0);
3412 if (data
->rpc_status
== 0) {
3413 memcpy(data
->lsp
->ls_stateid
.data
, data
->res
.stateid
.data
,
3414 sizeof(data
->lsp
->ls_stateid
.data
));
3415 data
->lsp
->ls_flags
|= NFS_LOCK_INITIALIZED
;
3416 renew_lease(NFS_SERVER(data
->ctx
->path
.dentry
->d_inode
), data
->timestamp
);
3418 nfs_increment_lock_seqid(data
->rpc_status
, data
->arg
.lock_seqid
);
3420 dprintk("%s: done, ret = %d!\n", __FUNCTION__
, data
->rpc_status
);
3423 static void nfs4_lock_release(void *calldata
)
3425 struct nfs4_lockdata
*data
= calldata
;
3427 dprintk("%s: begin!\n", __FUNCTION__
);
3428 if (data
->arg
.open_seqid
!= NULL
)
3429 nfs_free_seqid(data
->arg
.open_seqid
);
3430 if (data
->cancelled
!= 0) {
3431 struct rpc_task
*task
;
3432 task
= nfs4_do_unlck(&data
->fl
, data
->ctx
, data
->lsp
,
3433 data
->arg
.lock_seqid
);
3436 dprintk("%s: cancelling lock!\n", __FUNCTION__
);
3438 nfs_free_seqid(data
->arg
.lock_seqid
);
3439 nfs4_put_lock_state(data
->lsp
);
3440 put_nfs_open_context(data
->ctx
);
3442 dprintk("%s: done!\n", __FUNCTION__
);
3445 static const struct rpc_call_ops nfs4_lock_ops
= {
3446 .rpc_call_prepare
= nfs4_lock_prepare
,
3447 .rpc_call_done
= nfs4_lock_done
,
3448 .rpc_release
= nfs4_lock_release
,
3451 static int _nfs4_do_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*fl
, int reclaim
)
3453 struct nfs4_lockdata
*data
;
3454 struct rpc_task
*task
;
3457 dprintk("%s: begin!\n", __FUNCTION__
);
3458 data
= nfs4_alloc_lockdata(fl
, fl
->fl_file
->private_data
,
3459 fl
->fl_u
.nfs4_fl
.owner
);
3463 data
->arg
.block
= 1;
3465 data
->arg
.reclaim
= 1;
3466 task
= rpc_run_task(NFS_CLIENT(state
->inode
), RPC_TASK_ASYNC
,
3467 &nfs4_lock_ops
, data
);
3469 return PTR_ERR(task
);
3470 ret
= nfs4_wait_for_completion_rpc_task(task
);
3472 ret
= data
->rpc_status
;
3473 if (ret
== -NFS4ERR_DENIED
)
3476 data
->cancelled
= 1;
3478 dprintk("%s: done, ret = %d!\n", __FUNCTION__
, ret
);
3482 static int nfs4_lock_reclaim(struct nfs4_state
*state
, struct file_lock
*request
)
3484 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3485 struct nfs4_exception exception
= { };
3489 /* Cache the lock if possible... */
3490 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
3492 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 1);
3493 if (err
!= -NFS4ERR_DELAY
)
3495 nfs4_handle_exception(server
, err
, &exception
);
3496 } while (exception
.retry
);
3500 static int nfs4_lock_expired(struct nfs4_state
*state
, struct file_lock
*request
)
3502 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3503 struct nfs4_exception exception
= { };
3506 err
= nfs4_set_lock_state(state
, request
);
3510 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
3512 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 0);
3513 if (err
!= -NFS4ERR_DELAY
)
3515 nfs4_handle_exception(server
, err
, &exception
);
3516 } while (exception
.retry
);
3520 static int _nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3522 struct nfs_client
*clp
= state
->owner
->so_client
;
3523 unsigned char fl_flags
= request
->fl_flags
;
3526 /* Is this a delegated open? */
3527 status
= nfs4_set_lock_state(state
, request
);
3530 request
->fl_flags
|= FL_ACCESS
;
3531 status
= do_vfs_lock(request
->fl_file
, request
);
3534 down_read(&clp
->cl_sem
);
3535 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
)) {
3536 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
3537 /* Yes: cache locks! */
3538 down_read(&nfsi
->rwsem
);
3539 /* ...but avoid races with delegation recall... */
3540 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
)) {
3541 request
->fl_flags
= fl_flags
& ~FL_SLEEP
;
3542 status
= do_vfs_lock(request
->fl_file
, request
);
3543 up_read(&nfsi
->rwsem
);
3546 up_read(&nfsi
->rwsem
);
3548 status
= _nfs4_do_setlk(state
, cmd
, request
, 0);
3551 /* Note: we always want to sleep here! */
3552 request
->fl_flags
= fl_flags
| FL_SLEEP
;
3553 if (do_vfs_lock(request
->fl_file
, request
) < 0)
3554 printk(KERN_WARNING
"%s: VFS is out of sync with lock manager!\n", __FUNCTION__
);
3556 up_read(&clp
->cl_sem
);
3558 request
->fl_flags
= fl_flags
;
3562 static int nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3564 struct nfs4_exception exception
= { };
3568 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3569 _nfs4_proc_setlk(state
, cmd
, request
),
3571 } while (exception
.retry
);
3576 nfs4_proc_lock(struct file
*filp
, int cmd
, struct file_lock
*request
)
3578 struct nfs_open_context
*ctx
;
3579 struct nfs4_state
*state
;
3580 unsigned long timeout
= NFS4_LOCK_MINTIMEOUT
;
3583 /* verify open state */
3584 ctx
= (struct nfs_open_context
*)filp
->private_data
;
3587 if (request
->fl_start
< 0 || request
->fl_end
< 0)
3591 return nfs4_proc_getlk(state
, F_GETLK
, request
);
3593 if (!(IS_SETLK(cmd
) || IS_SETLKW(cmd
)))
3596 if (request
->fl_type
== F_UNLCK
)
3597 return nfs4_proc_unlck(state
, cmd
, request
);
3600 status
= nfs4_proc_setlk(state
, cmd
, request
);
3601 if ((status
!= -EAGAIN
) || IS_SETLK(cmd
))
3603 timeout
= nfs4_set_lock_task_retry(timeout
);
3604 status
= -ERESTARTSYS
;
3607 } while(status
< 0);
3611 int nfs4_lock_delegation_recall(struct nfs4_state
*state
, struct file_lock
*fl
)
3613 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3614 struct nfs4_exception exception
= { };
3617 err
= nfs4_set_lock_state(state
, fl
);
3621 err
= _nfs4_do_setlk(state
, F_SETLK
, fl
, 0);
3622 if (err
!= -NFS4ERR_DELAY
)
3624 err
= nfs4_handle_exception(server
, err
, &exception
);
3625 } while (exception
.retry
);
3630 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3632 int nfs4_setxattr(struct dentry
*dentry
, const char *key
, const void *buf
,
3633 size_t buflen
, int flags
)
3635 struct inode
*inode
= dentry
->d_inode
;
3637 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
3640 if (!S_ISREG(inode
->i_mode
) &&
3641 (!S_ISDIR(inode
->i_mode
) || inode
->i_mode
& S_ISVTX
))
3644 return nfs4_proc_set_acl(inode
, buf
, buflen
);
3647 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3648 * and that's what we'll do for e.g. user attributes that haven't been set.
3649 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3650 * attributes in kernel-managed attribute namespaces. */
3651 ssize_t
nfs4_getxattr(struct dentry
*dentry
, const char *key
, void *buf
,
3654 struct inode
*inode
= dentry
->d_inode
;
3656 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
3659 return nfs4_proc_get_acl(inode
, buf
, buflen
);
3662 ssize_t
nfs4_listxattr(struct dentry
*dentry
, char *buf
, size_t buflen
)
3664 size_t len
= strlen(XATTR_NAME_NFSV4_ACL
) + 1;
3666 if (!nfs4_server_supports_acls(NFS_SERVER(dentry
->d_inode
)))
3668 if (buf
&& buflen
< len
)
3671 memcpy(buf
, XATTR_NAME_NFSV4_ACL
, len
);
3675 int nfs4_proc_fs_locations(struct inode
*dir
, struct qstr
*name
,
3676 struct nfs4_fs_locations
*fs_locations
, struct page
*page
)
3678 struct nfs_server
*server
= NFS_SERVER(dir
);
3680 [0] = FATTR4_WORD0_FSID
| FATTR4_WORD0_FS_LOCATIONS
,
3681 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID
,
3683 struct nfs4_fs_locations_arg args
= {
3684 .dir_fh
= NFS_FH(dir
),
3689 struct rpc_message msg
= {
3690 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FS_LOCATIONS
],
3692 .rpc_resp
= fs_locations
,
3696 dprintk("%s: start\n", __FUNCTION__
);
3697 nfs_fattr_init(&fs_locations
->fattr
);
3698 fs_locations
->server
= server
;
3699 fs_locations
->nlocations
= 0;
3700 status
= rpc_call_sync(server
->client
, &msg
, 0);
3701 dprintk("%s: returned status = %d\n", __FUNCTION__
, status
);
3705 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops
= {
3706 .recover_open
= nfs4_open_reclaim
,
3707 .recover_lock
= nfs4_lock_reclaim
,
3710 struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops
= {
3711 .recover_open
= nfs4_open_expired
,
3712 .recover_lock
= nfs4_lock_expired
,
3715 static const struct inode_operations nfs4_file_inode_operations
= {
3716 .permission
= nfs_permission
,
3717 .getattr
= nfs_getattr
,
3718 .setattr
= nfs_setattr
,
3719 .getxattr
= nfs4_getxattr
,
3720 .setxattr
= nfs4_setxattr
,
3721 .listxattr
= nfs4_listxattr
,
3724 const struct nfs_rpc_ops nfs_v4_clientops
= {
3725 .version
= 4, /* protocol version */
3726 .dentry_ops
= &nfs4_dentry_operations
,
3727 .dir_inode_ops
= &nfs4_dir_inode_operations
,
3728 .file_inode_ops
= &nfs4_file_inode_operations
,
3729 .getroot
= nfs4_proc_get_root
,
3730 .getattr
= nfs4_proc_getattr
,
3731 .setattr
= nfs4_proc_setattr
,
3732 .lookupfh
= nfs4_proc_lookupfh
,
3733 .lookup
= nfs4_proc_lookup
,
3734 .access
= nfs4_proc_access
,
3735 .readlink
= nfs4_proc_readlink
,
3736 .create
= nfs4_proc_create
,
3737 .remove
= nfs4_proc_remove
,
3738 .unlink_setup
= nfs4_proc_unlink_setup
,
3739 .unlink_done
= nfs4_proc_unlink_done
,
3740 .rename
= nfs4_proc_rename
,
3741 .link
= nfs4_proc_link
,
3742 .symlink
= nfs4_proc_symlink
,
3743 .mkdir
= nfs4_proc_mkdir
,
3744 .rmdir
= nfs4_proc_remove
,
3745 .readdir
= nfs4_proc_readdir
,
3746 .mknod
= nfs4_proc_mknod
,
3747 .statfs
= nfs4_proc_statfs
,
3748 .fsinfo
= nfs4_proc_fsinfo
,
3749 .pathconf
= nfs4_proc_pathconf
,
3750 .set_capabilities
= nfs4_server_capabilities
,
3751 .decode_dirent
= nfs4_decode_dirent
,
3752 .read_setup
= nfs4_proc_read_setup
,
3753 .read_done
= nfs4_read_done
,
3754 .write_setup
= nfs4_proc_write_setup
,
3755 .write_done
= nfs4_write_done
,
3756 .commit_setup
= nfs4_proc_commit_setup
,
3757 .commit_done
= nfs4_commit_done
,
3758 .file_open
= nfs_open
,
3759 .file_release
= nfs_release
,
3760 .lock
= nfs4_proc_lock
,
3761 .clear_acl_cache
= nfs4_zap_acl_attr
,