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_handle_exception(const struct nfs_server
*server
, int errorcode
, struct nfs4_exception
*exception
);
66 static int nfs4_wait_clnt_recover(struct rpc_clnt
*clnt
, struct nfs_client
*clp
);
67 static int _nfs4_proc_lookup(struct inode
*dir
, const struct qstr
*name
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
);
68 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
);
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
, NFS_FILEID(dentry
->d_inode
));
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
, NFS_FILEID(dentry
->d_parent
->d_inode
));
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
->atomic
|| cinfo
->before
!= nfsi
->change_attr
)
213 nfsi
->cache_change_attribute
= jiffies
;
214 nfsi
->change_attr
= cinfo
->after
;
215 spin_unlock(&dir
->i_lock
);
218 struct nfs4_opendata
{
220 struct nfs_openargs o_arg
;
221 struct nfs_openres o_res
;
222 struct nfs_open_confirmargs c_arg
;
223 struct nfs_open_confirmres c_res
;
224 struct nfs_fattr f_attr
;
225 struct nfs_fattr dir_attr
;
228 struct nfs4_state_owner
*owner
;
229 struct nfs4_state
*state
;
231 unsigned long timestamp
;
232 unsigned int rpc_done
: 1;
238 static void nfs4_init_opendata_res(struct nfs4_opendata
*p
)
240 p
->o_res
.f_attr
= &p
->f_attr
;
241 p
->o_res
.dir_attr
= &p
->dir_attr
;
242 p
->o_res
.server
= p
->o_arg
.server
;
243 nfs_fattr_init(&p
->f_attr
);
244 nfs_fattr_init(&p
->dir_attr
);
247 static struct nfs4_opendata
*nfs4_opendata_alloc(struct path
*path
,
248 struct nfs4_state_owner
*sp
, int flags
,
249 const struct iattr
*attrs
)
251 struct dentry
*parent
= dget_parent(path
->dentry
);
252 struct inode
*dir
= parent
->d_inode
;
253 struct nfs_server
*server
= NFS_SERVER(dir
);
254 struct nfs4_opendata
*p
;
256 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
259 p
->o_arg
.seqid
= nfs_alloc_seqid(&sp
->so_seqid
);
260 if (p
->o_arg
.seqid
== NULL
)
262 p
->path
.mnt
= mntget(path
->mnt
);
263 p
->path
.dentry
= dget(path
->dentry
);
266 atomic_inc(&sp
->so_count
);
267 p
->o_arg
.fh
= NFS_FH(dir
);
268 p
->o_arg
.open_flags
= flags
,
269 p
->o_arg
.clientid
= server
->nfs_client
->cl_clientid
;
270 p
->o_arg
.id
= sp
->so_owner_id
.id
;
271 p
->o_arg
.name
= &p
->path
.dentry
->d_name
;
272 p
->o_arg
.server
= server
;
273 p
->o_arg
.bitmask
= server
->attr_bitmask
;
274 p
->o_arg
.claim
= NFS4_OPEN_CLAIM_NULL
;
275 if (flags
& O_EXCL
) {
276 u32
*s
= (u32
*) p
->o_arg
.u
.verifier
.data
;
279 } else if (flags
& O_CREAT
) {
280 p
->o_arg
.u
.attrs
= &p
->attrs
;
281 memcpy(&p
->attrs
, attrs
, sizeof(p
->attrs
));
283 p
->c_arg
.fh
= &p
->o_res
.fh
;
284 p
->c_arg
.stateid
= &p
->o_res
.stateid
;
285 p
->c_arg
.seqid
= p
->o_arg
.seqid
;
286 nfs4_init_opendata_res(p
);
296 static void nfs4_opendata_free(struct kref
*kref
)
298 struct nfs4_opendata
*p
= container_of(kref
,
299 struct nfs4_opendata
, kref
);
301 nfs_free_seqid(p
->o_arg
.seqid
);
302 if (p
->state
!= NULL
)
303 nfs4_put_open_state(p
->state
);
304 nfs4_put_state_owner(p
->owner
);
306 dput(p
->path
.dentry
);
311 static void nfs4_opendata_put(struct nfs4_opendata
*p
)
314 kref_put(&p
->kref
, nfs4_opendata_free
);
317 static int nfs4_wait_for_completion_rpc_task(struct rpc_task
*task
)
322 rpc_clnt_sigmask(task
->tk_client
, &oldset
);
323 ret
= rpc_wait_for_completion_task(task
);
324 rpc_clnt_sigunmask(task
->tk_client
, &oldset
);
328 static int can_open_cached(struct nfs4_state
*state
, int mode
)
331 switch (mode
& (FMODE_READ
|FMODE_WRITE
|O_EXCL
)) {
333 ret
|= test_bit(NFS_O_RDONLY_STATE
, &state
->flags
) != 0;
336 ret
|= test_bit(NFS_O_WRONLY_STATE
, &state
->flags
) != 0;
338 case FMODE_READ
|FMODE_WRITE
:
339 ret
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
) != 0;
344 static int can_open_delegated(struct nfs_delegation
*delegation
, mode_t open_flags
)
346 if ((delegation
->type
& open_flags
) != open_flags
)
348 if (delegation
->flags
& NFS_DELEGATION_NEED_RECLAIM
)
353 static void update_open_stateflags(struct nfs4_state
*state
, mode_t open_flags
)
355 switch (open_flags
) {
362 case FMODE_READ
|FMODE_WRITE
:
365 nfs4_state_set_mode_locked(state
, state
->state
| open_flags
);
368 static void nfs_set_open_stateid_locked(struct nfs4_state
*state
, nfs4_stateid
*stateid
, int open_flags
)
370 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0)
371 memcpy(state
->stateid
.data
, stateid
->data
, sizeof(state
->stateid
.data
));
372 memcpy(state
->open_stateid
.data
, stateid
->data
, sizeof(state
->open_stateid
.data
));
373 switch (open_flags
) {
375 set_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
378 set_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
380 case FMODE_READ
|FMODE_WRITE
:
381 set_bit(NFS_O_RDWR_STATE
, &state
->flags
);
385 static void nfs_set_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*stateid
, int open_flags
)
387 write_seqlock(&state
->seqlock
);
388 nfs_set_open_stateid_locked(state
, stateid
, open_flags
);
389 write_sequnlock(&state
->seqlock
);
392 static void update_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*open_stateid
, nfs4_stateid
*deleg_stateid
, int open_flags
)
394 open_flags
&= (FMODE_READ
|FMODE_WRITE
);
396 * Protect the call to nfs4_state_set_mode_locked and
397 * serialise the stateid update
399 write_seqlock(&state
->seqlock
);
400 if (deleg_stateid
!= NULL
) {
401 memcpy(state
->stateid
.data
, deleg_stateid
->data
, sizeof(state
->stateid
.data
));
402 set_bit(NFS_DELEGATED_STATE
, &state
->flags
);
404 if (open_stateid
!= NULL
)
405 nfs_set_open_stateid_locked(state
, open_stateid
, open_flags
);
406 write_sequnlock(&state
->seqlock
);
407 spin_lock(&state
->owner
->so_lock
);
408 update_open_stateflags(state
, open_flags
);
409 spin_unlock(&state
->owner
->so_lock
);
412 static void nfs4_return_incompatible_delegation(struct inode
*inode
, mode_t open_flags
)
414 struct nfs_delegation
*delegation
;
417 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
418 if (delegation
== NULL
|| (delegation
->type
& open_flags
) == open_flags
) {
423 nfs_inode_return_delegation(inode
);
426 static struct nfs4_state
*nfs4_try_open_cached(struct nfs4_opendata
*opendata
)
428 struct nfs4_state
*state
= opendata
->state
;
429 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
430 struct nfs_delegation
*delegation
;
431 int open_mode
= opendata
->o_arg
.open_flags
& (FMODE_READ
|FMODE_WRITE
|O_EXCL
);
432 nfs4_stateid stateid
;
436 delegation
= rcu_dereference(nfsi
->delegation
);
438 if (can_open_cached(state
, open_mode
)) {
439 spin_lock(&state
->owner
->so_lock
);
440 if (can_open_cached(state
, open_mode
)) {
441 update_open_stateflags(state
, open_mode
);
442 spin_unlock(&state
->owner
->so_lock
);
444 goto out_return_state
;
446 spin_unlock(&state
->owner
->so_lock
);
448 if (delegation
== NULL
)
450 if (!can_open_delegated(delegation
, open_mode
))
452 /* Save the delegation */
453 memcpy(stateid
.data
, delegation
->stateid
.data
, sizeof(stateid
.data
));
456 ret
= nfs_may_open(state
->inode
, state
->owner
->so_cred
, open_mode
);
462 delegation
= rcu_dereference(nfsi
->delegation
);
463 /* If no delegation, try a cached open */
464 if (delegation
== NULL
)
466 /* Is the delegation still valid? */
467 if (memcmp(stateid
.data
, delegation
->stateid
.data
, sizeof(stateid
.data
)) != 0)
470 update_open_stateid(state
, NULL
, &stateid
, open_mode
);
471 goto out_return_state
;
477 atomic_inc(&state
->count
);
481 static struct nfs4_state
*nfs4_opendata_to_nfs4_state(struct nfs4_opendata
*data
)
484 struct nfs4_state
*state
= NULL
;
485 struct nfs_delegation
*delegation
;
486 nfs4_stateid
*deleg_stateid
= NULL
;
489 if (!data
->rpc_done
) {
490 state
= nfs4_try_open_cached(data
);
495 if (!(data
->f_attr
.valid
& NFS_ATTR_FATTR
))
497 inode
= nfs_fhget(data
->dir
->d_sb
, &data
->o_res
.fh
, &data
->f_attr
);
498 ret
= PTR_ERR(inode
);
502 state
= nfs4_get_open_state(inode
, data
->owner
);
505 if (data
->o_res
.delegation_type
!= 0) {
506 int delegation_flags
= 0;
509 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
511 delegation_flags
= delegation
->flags
;
513 if (!(delegation_flags
& NFS_DELEGATION_NEED_RECLAIM
))
514 nfs_inode_set_delegation(state
->inode
,
515 data
->owner
->so_cred
,
518 nfs_inode_reclaim_delegation(state
->inode
,
519 data
->owner
->so_cred
,
523 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
524 if (delegation
!= NULL
)
525 deleg_stateid
= &delegation
->stateid
;
526 update_open_stateid(state
, &data
->o_res
.stateid
, deleg_stateid
, data
->o_arg
.open_flags
);
537 static struct nfs_open_context
*nfs4_state_find_open_context(struct nfs4_state
*state
)
539 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
540 struct nfs_open_context
*ctx
;
542 spin_lock(&state
->inode
->i_lock
);
543 list_for_each_entry(ctx
, &nfsi
->open_files
, list
) {
544 if (ctx
->state
!= state
)
546 get_nfs_open_context(ctx
);
547 spin_unlock(&state
->inode
->i_lock
);
550 spin_unlock(&state
->inode
->i_lock
);
551 return ERR_PTR(-ENOENT
);
554 static struct nfs4_opendata
*nfs4_open_recoverdata_alloc(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
556 struct nfs4_opendata
*opendata
;
558 opendata
= nfs4_opendata_alloc(&ctx
->path
, state
->owner
, 0, NULL
);
559 if (opendata
== NULL
)
560 return ERR_PTR(-ENOMEM
);
561 opendata
->state
= state
;
562 atomic_inc(&state
->count
);
566 static int nfs4_open_recover_helper(struct nfs4_opendata
*opendata
, mode_t openflags
, struct nfs4_state
**res
)
568 struct nfs4_state
*newstate
;
571 opendata
->o_arg
.open_flags
= openflags
;
572 memset(&opendata
->o_res
, 0, sizeof(opendata
->o_res
));
573 memset(&opendata
->c_res
, 0, sizeof(opendata
->c_res
));
574 nfs4_init_opendata_res(opendata
);
575 ret
= _nfs4_proc_open(opendata
);
578 newstate
= nfs4_opendata_to_nfs4_state(opendata
);
579 if (IS_ERR(newstate
))
580 return PTR_ERR(newstate
);
581 nfs4_close_state(&opendata
->path
, newstate
, openflags
);
586 static int nfs4_open_recover(struct nfs4_opendata
*opendata
, struct nfs4_state
*state
)
588 struct nfs4_state
*newstate
;
591 /* memory barrier prior to reading state->n_* */
592 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
594 if (state
->n_rdwr
!= 0) {
595 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
|FMODE_WRITE
, &newstate
);
598 if (newstate
!= state
)
601 if (state
->n_wronly
!= 0) {
602 ret
= nfs4_open_recover_helper(opendata
, FMODE_WRITE
, &newstate
);
605 if (newstate
!= state
)
608 if (state
->n_rdonly
!= 0) {
609 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
, &newstate
);
612 if (newstate
!= state
)
616 * We may have performed cached opens for all three recoveries.
617 * Check if we need to update the current stateid.
619 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0 &&
620 memcmp(state
->stateid
.data
, state
->open_stateid
.data
, sizeof(state
->stateid
.data
)) != 0) {
621 write_seqlock(&state
->seqlock
);
622 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0)
623 memcpy(state
->stateid
.data
, state
->open_stateid
.data
, sizeof(state
->stateid
.data
));
624 write_sequnlock(&state
->seqlock
);
631 * reclaim state on the server after a reboot.
633 static int _nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
635 struct nfs_delegation
*delegation
;
636 struct nfs4_opendata
*opendata
;
637 int delegation_type
= 0;
640 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
641 if (IS_ERR(opendata
))
642 return PTR_ERR(opendata
);
643 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_PREVIOUS
;
644 opendata
->o_arg
.fh
= NFS_FH(state
->inode
);
646 delegation
= rcu_dereference(NFS_I(state
->inode
)->delegation
);
647 if (delegation
!= NULL
&& (delegation
->flags
& NFS_DELEGATION_NEED_RECLAIM
) != 0)
648 delegation_type
= delegation
->type
;
650 opendata
->o_arg
.u
.delegation_type
= delegation_type
;
651 status
= nfs4_open_recover(opendata
, state
);
652 nfs4_opendata_put(opendata
);
656 static int nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
658 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
659 struct nfs4_exception exception
= { };
662 err
= _nfs4_do_open_reclaim(ctx
, state
);
663 if (err
!= -NFS4ERR_DELAY
)
665 nfs4_handle_exception(server
, err
, &exception
);
666 } while (exception
.retry
);
670 static int nfs4_open_reclaim(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
672 struct nfs_open_context
*ctx
;
675 ctx
= nfs4_state_find_open_context(state
);
678 ret
= nfs4_do_open_reclaim(ctx
, state
);
679 put_nfs_open_context(ctx
);
683 static int _nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
685 struct nfs4_opendata
*opendata
;
688 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
689 if (IS_ERR(opendata
))
690 return PTR_ERR(opendata
);
691 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_DELEGATE_CUR
;
692 memcpy(opendata
->o_arg
.u
.delegation
.data
, stateid
->data
,
693 sizeof(opendata
->o_arg
.u
.delegation
.data
));
694 ret
= nfs4_open_recover(opendata
, state
);
695 nfs4_opendata_put(opendata
);
699 int nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
701 struct nfs4_exception exception
= { };
702 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
705 err
= _nfs4_open_delegation_recall(ctx
, state
, stateid
);
709 case -NFS4ERR_STALE_CLIENTID
:
710 case -NFS4ERR_STALE_STATEID
:
711 case -NFS4ERR_EXPIRED
:
712 /* Don't recall a delegation if it was lost */
713 nfs4_schedule_state_recovery(server
->nfs_client
);
716 err
= nfs4_handle_exception(server
, err
, &exception
);
717 } while (exception
.retry
);
721 static void nfs4_open_confirm_prepare(struct rpc_task
*task
, void *calldata
)
723 struct nfs4_opendata
*data
= calldata
;
724 struct rpc_message msg
= {
725 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_CONFIRM
],
726 .rpc_argp
= &data
->c_arg
,
727 .rpc_resp
= &data
->c_res
,
728 .rpc_cred
= data
->owner
->so_cred
,
730 data
->timestamp
= jiffies
;
731 rpc_call_setup(task
, &msg
, 0);
734 static void nfs4_open_confirm_done(struct rpc_task
*task
, void *calldata
)
736 struct nfs4_opendata
*data
= calldata
;
738 data
->rpc_status
= task
->tk_status
;
739 if (RPC_ASSASSINATED(task
))
741 if (data
->rpc_status
== 0) {
742 memcpy(data
->o_res
.stateid
.data
, data
->c_res
.stateid
.data
,
743 sizeof(data
->o_res
.stateid
.data
));
744 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
745 renew_lease(data
->o_res
.server
, data
->timestamp
);
748 nfs_increment_open_seqid(data
->rpc_status
, data
->c_arg
.seqid
);
751 static void nfs4_open_confirm_release(void *calldata
)
753 struct nfs4_opendata
*data
= calldata
;
754 struct nfs4_state
*state
= NULL
;
756 /* If this request hasn't been cancelled, do nothing */
757 if (data
->cancelled
== 0)
759 /* In case of error, no cleanup! */
762 state
= nfs4_opendata_to_nfs4_state(data
);
764 nfs4_close_state(&data
->path
, state
, data
->o_arg
.open_flags
);
766 nfs4_opendata_put(data
);
769 static const struct rpc_call_ops nfs4_open_confirm_ops
= {
770 .rpc_call_prepare
= nfs4_open_confirm_prepare
,
771 .rpc_call_done
= nfs4_open_confirm_done
,
772 .rpc_release
= nfs4_open_confirm_release
,
776 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
778 static int _nfs4_proc_open_confirm(struct nfs4_opendata
*data
)
780 struct nfs_server
*server
= NFS_SERVER(data
->dir
->d_inode
);
781 struct rpc_task
*task
;
782 struct rpc_task_setup task_setup_data
= {
783 .rpc_client
= server
->client
,
784 .callback_ops
= &nfs4_open_confirm_ops
,
785 .callback_data
= data
,
786 .flags
= RPC_TASK_ASYNC
,
790 kref_get(&data
->kref
);
792 data
->rpc_status
= 0;
793 task
= rpc_run_task(&task_setup_data
);
795 return PTR_ERR(task
);
796 status
= nfs4_wait_for_completion_rpc_task(task
);
801 status
= data
->rpc_status
;
806 static void nfs4_open_prepare(struct rpc_task
*task
, void *calldata
)
808 struct nfs4_opendata
*data
= calldata
;
809 struct nfs4_state_owner
*sp
= data
->owner
;
810 struct rpc_message msg
= {
811 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN
],
812 .rpc_argp
= &data
->o_arg
,
813 .rpc_resp
= &data
->o_res
,
814 .rpc_cred
= sp
->so_cred
,
817 if (nfs_wait_on_sequence(data
->o_arg
.seqid
, task
) != 0)
820 * Check if we still need to send an OPEN call, or if we can use
821 * a delegation instead.
823 if (data
->state
!= NULL
) {
824 struct nfs_delegation
*delegation
;
826 if (can_open_cached(data
->state
, data
->o_arg
.open_flags
& (FMODE_READ
|FMODE_WRITE
|O_EXCL
)))
829 delegation
= rcu_dereference(NFS_I(data
->state
->inode
)->delegation
);
830 if (delegation
!= NULL
&&
831 (delegation
->flags
& NFS_DELEGATION_NEED_RECLAIM
) == 0) {
837 /* Update sequence id. */
838 data
->o_arg
.id
= sp
->so_owner_id
.id
;
839 data
->o_arg
.clientid
= sp
->so_client
->cl_clientid
;
840 if (data
->o_arg
.claim
== NFS4_OPEN_CLAIM_PREVIOUS
) {
841 msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_NOATTR
];
842 nfs_copy_fh(&data
->o_res
.fh
, data
->o_arg
.fh
);
844 data
->timestamp
= jiffies
;
845 rpc_call_setup(task
, &msg
, 0);
848 task
->tk_action
= NULL
;
852 static void nfs4_open_done(struct rpc_task
*task
, void *calldata
)
854 struct nfs4_opendata
*data
= calldata
;
856 data
->rpc_status
= task
->tk_status
;
857 if (RPC_ASSASSINATED(task
))
859 if (task
->tk_status
== 0) {
860 switch (data
->o_res
.f_attr
->mode
& S_IFMT
) {
864 data
->rpc_status
= -ELOOP
;
867 data
->rpc_status
= -EISDIR
;
870 data
->rpc_status
= -ENOTDIR
;
872 renew_lease(data
->o_res
.server
, data
->timestamp
);
873 if (!(data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
))
874 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
876 nfs_increment_open_seqid(data
->rpc_status
, data
->o_arg
.seqid
);
880 static void nfs4_open_release(void *calldata
)
882 struct nfs4_opendata
*data
= calldata
;
883 struct nfs4_state
*state
= NULL
;
885 /* If this request hasn't been cancelled, do nothing */
886 if (data
->cancelled
== 0)
888 /* In case of error, no cleanup! */
889 if (data
->rpc_status
!= 0 || !data
->rpc_done
)
891 /* In case we need an open_confirm, no cleanup! */
892 if (data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
)
894 state
= nfs4_opendata_to_nfs4_state(data
);
896 nfs4_close_state(&data
->path
, state
, data
->o_arg
.open_flags
);
898 nfs4_opendata_put(data
);
901 static const struct rpc_call_ops nfs4_open_ops
= {
902 .rpc_call_prepare
= nfs4_open_prepare
,
903 .rpc_call_done
= nfs4_open_done
,
904 .rpc_release
= nfs4_open_release
,
908 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
910 static int _nfs4_proc_open(struct nfs4_opendata
*data
)
912 struct inode
*dir
= data
->dir
->d_inode
;
913 struct nfs_server
*server
= NFS_SERVER(dir
);
914 struct nfs_openargs
*o_arg
= &data
->o_arg
;
915 struct nfs_openres
*o_res
= &data
->o_res
;
916 struct rpc_task
*task
;
917 struct rpc_task_setup task_setup_data
= {
918 .rpc_client
= server
->client
,
919 .callback_ops
= &nfs4_open_ops
,
920 .callback_data
= data
,
921 .flags
= RPC_TASK_ASYNC
,
925 kref_get(&data
->kref
);
927 data
->rpc_status
= 0;
929 task
= rpc_run_task(&task_setup_data
);
931 return PTR_ERR(task
);
932 status
= nfs4_wait_for_completion_rpc_task(task
);
937 status
= data
->rpc_status
;
939 if (status
!= 0 || !data
->rpc_done
)
942 if (o_res
->fh
.size
== 0)
943 _nfs4_proc_lookup(dir
, o_arg
->name
, &o_res
->fh
, o_res
->f_attr
);
945 if (o_arg
->open_flags
& O_CREAT
) {
946 update_changeattr(dir
, &o_res
->cinfo
);
947 nfs_post_op_update_inode(dir
, o_res
->dir_attr
);
949 nfs_refresh_inode(dir
, o_res
->dir_attr
);
950 if(o_res
->rflags
& NFS4_OPEN_RESULT_CONFIRM
) {
951 status
= _nfs4_proc_open_confirm(data
);
955 if (!(o_res
->f_attr
->valid
& NFS_ATTR_FATTR
))
956 _nfs4_proc_getattr(server
, &o_res
->fh
, o_res
->f_attr
);
960 static int nfs4_recover_expired_lease(struct nfs_server
*server
)
962 struct nfs_client
*clp
= server
->nfs_client
;
966 ret
= nfs4_wait_clnt_recover(server
->client
, clp
);
969 if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
))
971 nfs4_schedule_state_recovery(clp
);
978 * reclaim state on the server after a network partition.
979 * Assumes caller holds the appropriate lock
981 static int _nfs4_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
983 struct nfs4_opendata
*opendata
;
986 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
987 if (IS_ERR(opendata
))
988 return PTR_ERR(opendata
);
989 ret
= nfs4_open_recover(opendata
, state
);
990 if (ret
== -ESTALE
) {
991 /* Invalidate the state owner so we don't ever use it again */
992 nfs4_drop_state_owner(state
->owner
);
993 d_drop(ctx
->path
.dentry
);
995 nfs4_opendata_put(opendata
);
999 static inline int nfs4_do_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1001 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1002 struct nfs4_exception exception
= { };
1006 err
= _nfs4_open_expired(ctx
, state
);
1007 if (err
== -NFS4ERR_DELAY
)
1008 nfs4_handle_exception(server
, err
, &exception
);
1009 } while (exception
.retry
);
1013 static int nfs4_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
1015 struct nfs_open_context
*ctx
;
1018 ctx
= nfs4_state_find_open_context(state
);
1020 return PTR_ERR(ctx
);
1021 ret
= nfs4_do_open_expired(ctx
, state
);
1022 put_nfs_open_context(ctx
);
1027 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1028 * fields corresponding to attributes that were used to store the verifier.
1029 * Make sure we clobber those fields in the later setattr call
1031 static inline void nfs4_exclusive_attrset(struct nfs4_opendata
*opendata
, struct iattr
*sattr
)
1033 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_ACCESS
) &&
1034 !(sattr
->ia_valid
& ATTR_ATIME_SET
))
1035 sattr
->ia_valid
|= ATTR_ATIME
;
1037 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_MODIFY
) &&
1038 !(sattr
->ia_valid
& ATTR_MTIME_SET
))
1039 sattr
->ia_valid
|= ATTR_MTIME
;
1043 * Returns a referenced nfs4_state
1045 static int _nfs4_do_open(struct inode
*dir
, struct path
*path
, int flags
, struct iattr
*sattr
, struct rpc_cred
*cred
, struct nfs4_state
**res
)
1047 struct nfs4_state_owner
*sp
;
1048 struct nfs4_state
*state
= NULL
;
1049 struct nfs_server
*server
= NFS_SERVER(dir
);
1050 struct nfs_client
*clp
= server
->nfs_client
;
1051 struct nfs4_opendata
*opendata
;
1054 /* Protect against reboot recovery conflicts */
1056 if (!(sp
= nfs4_get_state_owner(server
, cred
))) {
1057 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1060 status
= nfs4_recover_expired_lease(server
);
1062 goto err_put_state_owner
;
1063 if (path
->dentry
->d_inode
!= NULL
)
1064 nfs4_return_incompatible_delegation(path
->dentry
->d_inode
, flags
& (FMODE_READ
|FMODE_WRITE
));
1065 down_read(&clp
->cl_sem
);
1067 opendata
= nfs4_opendata_alloc(path
, sp
, flags
, sattr
);
1068 if (opendata
== NULL
)
1069 goto err_release_rwsem
;
1071 if (path
->dentry
->d_inode
!= NULL
)
1072 opendata
->state
= nfs4_get_open_state(path
->dentry
->d_inode
, sp
);
1074 status
= _nfs4_proc_open(opendata
);
1076 goto err_opendata_put
;
1078 if (opendata
->o_arg
.open_flags
& O_EXCL
)
1079 nfs4_exclusive_attrset(opendata
, sattr
);
1081 state
= nfs4_opendata_to_nfs4_state(opendata
);
1082 status
= PTR_ERR(state
);
1084 goto err_opendata_put
;
1085 nfs4_opendata_put(opendata
);
1086 nfs4_put_state_owner(sp
);
1087 up_read(&clp
->cl_sem
);
1091 nfs4_opendata_put(opendata
);
1093 up_read(&clp
->cl_sem
);
1094 err_put_state_owner
:
1095 nfs4_put_state_owner(sp
);
1102 static struct nfs4_state
*nfs4_do_open(struct inode
*dir
, struct path
*path
, int flags
, struct iattr
*sattr
, struct rpc_cred
*cred
)
1104 struct nfs4_exception exception
= { };
1105 struct nfs4_state
*res
;
1109 status
= _nfs4_do_open(dir
, path
, flags
, sattr
, cred
, &res
);
1112 /* NOTE: BAD_SEQID means the server and client disagree about the
1113 * book-keeping w.r.t. state-changing operations
1114 * (OPEN/CLOSE/LOCK/LOCKU...)
1115 * It is actually a sign of a bug on the client or on the server.
1117 * If we receive a BAD_SEQID error in the particular case of
1118 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1119 * have unhashed the old state_owner for us, and that we can
1120 * therefore safely retry using a new one. We should still warn
1121 * the user though...
1123 if (status
== -NFS4ERR_BAD_SEQID
) {
1124 printk(KERN_WARNING
"NFS: v4 server %s "
1125 " returned a bad sequence-id error!\n",
1126 NFS_SERVER(dir
)->nfs_client
->cl_hostname
);
1127 exception
.retry
= 1;
1131 * BAD_STATEID on OPEN means that the server cancelled our
1132 * state before it received the OPEN_CONFIRM.
1133 * Recover by retrying the request as per the discussion
1134 * on Page 181 of RFC3530.
1136 if (status
== -NFS4ERR_BAD_STATEID
) {
1137 exception
.retry
= 1;
1140 if (status
== -EAGAIN
) {
1141 /* We must have found a delegation */
1142 exception
.retry
= 1;
1145 res
= ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir
),
1146 status
, &exception
));
1147 } while (exception
.retry
);
1151 static int _nfs4_do_setattr(struct inode
*inode
, struct nfs_fattr
*fattr
,
1152 struct iattr
*sattr
, struct nfs4_state
*state
)
1154 struct nfs_server
*server
= NFS_SERVER(inode
);
1155 struct nfs_setattrargs arg
= {
1156 .fh
= NFS_FH(inode
),
1159 .bitmask
= server
->attr_bitmask
,
1161 struct nfs_setattrres res
= {
1165 struct rpc_message msg
= {
1166 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETATTR
],
1170 unsigned long timestamp
= jiffies
;
1173 nfs_fattr_init(fattr
);
1175 if (nfs4_copy_delegation_stateid(&arg
.stateid
, inode
)) {
1176 /* Use that stateid */
1177 } else if (state
!= NULL
) {
1178 msg
.rpc_cred
= state
->owner
->so_cred
;
1179 nfs4_copy_stateid(&arg
.stateid
, state
, current
->files
);
1181 memcpy(&arg
.stateid
, &zero_stateid
, sizeof(arg
.stateid
));
1183 status
= rpc_call_sync(server
->client
, &msg
, 0);
1184 if (status
== 0 && state
!= NULL
)
1185 renew_lease(server
, timestamp
);
1189 static int nfs4_do_setattr(struct inode
*inode
, struct nfs_fattr
*fattr
,
1190 struct iattr
*sattr
, struct nfs4_state
*state
)
1192 struct nfs_server
*server
= NFS_SERVER(inode
);
1193 struct nfs4_exception exception
= { };
1196 err
= nfs4_handle_exception(server
,
1197 _nfs4_do_setattr(inode
, fattr
, sattr
, state
),
1199 } while (exception
.retry
);
1203 struct nfs4_closedata
{
1205 struct inode
*inode
;
1206 struct nfs4_state
*state
;
1207 struct nfs_closeargs arg
;
1208 struct nfs_closeres res
;
1209 struct nfs_fattr fattr
;
1210 unsigned long timestamp
;
1213 static void nfs4_free_closedata(void *data
)
1215 struct nfs4_closedata
*calldata
= data
;
1216 struct nfs4_state_owner
*sp
= calldata
->state
->owner
;
1218 nfs4_put_open_state(calldata
->state
);
1219 nfs_free_seqid(calldata
->arg
.seqid
);
1220 nfs4_put_state_owner(sp
);
1221 dput(calldata
->path
.dentry
);
1222 mntput(calldata
->path
.mnt
);
1226 static void nfs4_close_done(struct rpc_task
*task
, void *data
)
1228 struct nfs4_closedata
*calldata
= data
;
1229 struct nfs4_state
*state
= calldata
->state
;
1230 struct nfs_server
*server
= NFS_SERVER(calldata
->inode
);
1232 if (RPC_ASSASSINATED(task
))
1234 /* hmm. we are done with the inode, and in the process of freeing
1235 * the state_owner. we keep this around to process errors
1237 nfs_increment_open_seqid(task
->tk_status
, calldata
->arg
.seqid
);
1238 switch (task
->tk_status
) {
1240 nfs_set_open_stateid(state
, &calldata
->res
.stateid
, 0);
1241 renew_lease(server
, calldata
->timestamp
);
1243 case -NFS4ERR_STALE_STATEID
:
1244 case -NFS4ERR_EXPIRED
:
1247 if (nfs4_async_handle_error(task
, server
) == -EAGAIN
) {
1248 rpc_restart_call(task
);
1252 nfs_refresh_inode(calldata
->inode
, calldata
->res
.fattr
);
1255 static void nfs4_close_prepare(struct rpc_task
*task
, void *data
)
1257 struct nfs4_closedata
*calldata
= data
;
1258 struct nfs4_state
*state
= calldata
->state
;
1259 struct rpc_message msg
= {
1260 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CLOSE
],
1261 .rpc_argp
= &calldata
->arg
,
1262 .rpc_resp
= &calldata
->res
,
1263 .rpc_cred
= state
->owner
->so_cred
,
1265 int clear_rd
, clear_wr
, clear_rdwr
;
1267 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
1270 clear_rd
= clear_wr
= clear_rdwr
= 0;
1271 spin_lock(&state
->owner
->so_lock
);
1272 /* Calculate the change in open mode */
1273 if (state
->n_rdwr
== 0) {
1274 if (state
->n_rdonly
== 0) {
1275 clear_rd
|= test_and_clear_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
1276 clear_rdwr
|= test_and_clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1278 if (state
->n_wronly
== 0) {
1279 clear_wr
|= test_and_clear_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
1280 clear_rdwr
|= test_and_clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1283 spin_unlock(&state
->owner
->so_lock
);
1284 if (!clear_rd
&& !clear_wr
&& !clear_rdwr
) {
1285 /* Note: exit _without_ calling nfs4_close_done */
1286 task
->tk_action
= NULL
;
1289 nfs_fattr_init(calldata
->res
.fattr
);
1290 if (test_bit(NFS_O_RDONLY_STATE
, &state
->flags
) != 0) {
1291 msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_DOWNGRADE
];
1292 calldata
->arg
.open_flags
= FMODE_READ
;
1293 } else if (test_bit(NFS_O_WRONLY_STATE
, &state
->flags
) != 0) {
1294 msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_DOWNGRADE
];
1295 calldata
->arg
.open_flags
= FMODE_WRITE
;
1297 calldata
->timestamp
= jiffies
;
1298 rpc_call_setup(task
, &msg
, 0);
1301 static const struct rpc_call_ops nfs4_close_ops
= {
1302 .rpc_call_prepare
= nfs4_close_prepare
,
1303 .rpc_call_done
= nfs4_close_done
,
1304 .rpc_release
= nfs4_free_closedata
,
1308 * It is possible for data to be read/written from a mem-mapped file
1309 * after the sys_close call (which hits the vfs layer as a flush).
1310 * This means that we can't safely call nfsv4 close on a file until
1311 * the inode is cleared. This in turn means that we are not good
1312 * NFSv4 citizens - we do not indicate to the server to update the file's
1313 * share state even when we are done with one of the three share
1314 * stateid's in the inode.
1316 * NOTE: Caller must be holding the sp->so_owner semaphore!
1318 int nfs4_do_close(struct path
*path
, struct nfs4_state
*state
, int wait
)
1320 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1321 struct nfs4_closedata
*calldata
;
1322 struct nfs4_state_owner
*sp
= state
->owner
;
1323 struct rpc_task
*task
;
1324 struct rpc_task_setup task_setup_data
= {
1325 .rpc_client
= server
->client
,
1326 .callback_ops
= &nfs4_close_ops
,
1327 .flags
= RPC_TASK_ASYNC
,
1329 int status
= -ENOMEM
;
1331 calldata
= kmalloc(sizeof(*calldata
), GFP_KERNEL
);
1332 if (calldata
== NULL
)
1334 calldata
->inode
= state
->inode
;
1335 calldata
->state
= state
;
1336 calldata
->arg
.fh
= NFS_FH(state
->inode
);
1337 calldata
->arg
.stateid
= &state
->open_stateid
;
1338 /* Serialization for the sequence id */
1339 calldata
->arg
.seqid
= nfs_alloc_seqid(&state
->owner
->so_seqid
);
1340 if (calldata
->arg
.seqid
== NULL
)
1341 goto out_free_calldata
;
1342 calldata
->arg
.bitmask
= server
->attr_bitmask
;
1343 calldata
->res
.fattr
= &calldata
->fattr
;
1344 calldata
->res
.server
= server
;
1345 calldata
->path
.mnt
= mntget(path
->mnt
);
1346 calldata
->path
.dentry
= dget(path
->dentry
);
1348 task_setup_data
.callback_data
= calldata
;
1349 task
= rpc_run_task(&task_setup_data
);
1351 return PTR_ERR(task
);
1354 status
= rpc_wait_for_completion_task(task
);
1360 nfs4_put_open_state(state
);
1361 nfs4_put_state_owner(sp
);
1365 static int nfs4_intent_set_file(struct nameidata
*nd
, struct path
*path
, struct nfs4_state
*state
)
1370 /* If the open_intent is for execute, we have an extra check to make */
1371 if (nd
->intent
.open
.flags
& FMODE_EXEC
) {
1372 ret
= nfs_may_open(state
->inode
,
1373 state
->owner
->so_cred
,
1374 nd
->intent
.open
.flags
);
1378 filp
= lookup_instantiate_filp(nd
, path
->dentry
, NULL
);
1379 if (!IS_ERR(filp
)) {
1380 struct nfs_open_context
*ctx
;
1381 ctx
= nfs_file_open_context(filp
);
1385 ret
= PTR_ERR(filp
);
1387 nfs4_close_sync(path
, state
, nd
->intent
.open
.flags
);
1392 nfs4_atomic_open(struct inode
*dir
, struct dentry
*dentry
, struct nameidata
*nd
)
1394 struct dentry
*parent
;
1395 struct path path
= {
1400 struct rpc_cred
*cred
;
1401 struct nfs4_state
*state
;
1404 if (nd
->flags
& LOOKUP_CREATE
) {
1405 attr
.ia_mode
= nd
->intent
.open
.create_mode
;
1406 attr
.ia_valid
= ATTR_MODE
;
1407 if (!IS_POSIXACL(dir
))
1408 attr
.ia_mode
&= ~current
->fs
->umask
;
1411 BUG_ON(nd
->intent
.open
.flags
& O_CREAT
);
1414 cred
= rpcauth_lookupcred(NFS_CLIENT(dir
)->cl_auth
, 0);
1416 return (struct dentry
*)cred
;
1417 parent
= dentry
->d_parent
;
1418 /* Protect against concurrent sillydeletes */
1419 nfs_block_sillyrename(parent
);
1420 state
= nfs4_do_open(dir
, &path
, nd
->intent
.open
.flags
, &attr
, cred
);
1422 if (IS_ERR(state
)) {
1423 if (PTR_ERR(state
) == -ENOENT
) {
1424 d_add(dentry
, NULL
);
1425 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
1427 nfs_unblock_sillyrename(parent
);
1428 return (struct dentry
*)state
;
1430 res
= d_add_unique(dentry
, igrab(state
->inode
));
1433 nfs_set_verifier(path
.dentry
, nfs_save_change_attribute(dir
));
1434 nfs_unblock_sillyrename(parent
);
1435 nfs4_intent_set_file(nd
, &path
, state
);
1440 nfs4_open_revalidate(struct inode
*dir
, struct dentry
*dentry
, int openflags
, struct nameidata
*nd
)
1442 struct path path
= {
1446 struct rpc_cred
*cred
;
1447 struct nfs4_state
*state
;
1449 cred
= rpcauth_lookupcred(NFS_CLIENT(dir
)->cl_auth
, 0);
1451 return PTR_ERR(cred
);
1452 state
= nfs4_do_open(dir
, &path
, openflags
, NULL
, cred
);
1454 if (IS_ERR(state
)) {
1455 switch (PTR_ERR(state
)) {
1461 lookup_instantiate_filp(nd
, (struct dentry
*)state
, NULL
);
1467 if (state
->inode
== dentry
->d_inode
) {
1468 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
1469 nfs4_intent_set_file(nd
, &path
, state
);
1472 nfs4_close_sync(&path
, state
, openflags
);
1479 static int _nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1481 struct nfs4_server_caps_res res
= {};
1482 struct rpc_message msg
= {
1483 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SERVER_CAPS
],
1484 .rpc_argp
= fhandle
,
1489 status
= rpc_call_sync(server
->client
, &msg
, 0);
1491 memcpy(server
->attr_bitmask
, res
.attr_bitmask
, sizeof(server
->attr_bitmask
));
1492 if (res
.attr_bitmask
[0] & FATTR4_WORD0_ACL
)
1493 server
->caps
|= NFS_CAP_ACLS
;
1494 if (res
.has_links
!= 0)
1495 server
->caps
|= NFS_CAP_HARDLINKS
;
1496 if (res
.has_symlinks
!= 0)
1497 server
->caps
|= NFS_CAP_SYMLINKS
;
1498 server
->acl_bitmask
= res
.acl_bitmask
;
1503 int nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1505 struct nfs4_exception exception
= { };
1508 err
= nfs4_handle_exception(server
,
1509 _nfs4_server_capabilities(server
, fhandle
),
1511 } while (exception
.retry
);
1515 static int _nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1516 struct nfs_fsinfo
*info
)
1518 struct nfs4_lookup_root_arg args
= {
1519 .bitmask
= nfs4_fattr_bitmap
,
1521 struct nfs4_lookup_res res
= {
1523 .fattr
= info
->fattr
,
1526 struct rpc_message msg
= {
1527 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP_ROOT
],
1531 nfs_fattr_init(info
->fattr
);
1532 return rpc_call_sync(server
->client
, &msg
, 0);
1535 static int nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1536 struct nfs_fsinfo
*info
)
1538 struct nfs4_exception exception
= { };
1541 err
= nfs4_handle_exception(server
,
1542 _nfs4_lookup_root(server
, fhandle
, info
),
1544 } while (exception
.retry
);
1549 * get the file handle for the "/" directory on the server
1551 static int nfs4_proc_get_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1552 struct nfs_fsinfo
*info
)
1556 status
= nfs4_lookup_root(server
, fhandle
, info
);
1558 status
= nfs4_server_capabilities(server
, fhandle
);
1560 status
= nfs4_do_fsinfo(server
, fhandle
, info
);
1561 return nfs4_map_errors(status
);
1565 * Get locations and (maybe) other attributes of a referral.
1566 * Note that we'll actually follow the referral later when
1567 * we detect fsid mismatch in inode revalidation
1569 static int nfs4_get_referral(struct inode
*dir
, const struct qstr
*name
, struct nfs_fattr
*fattr
, struct nfs_fh
*fhandle
)
1571 int status
= -ENOMEM
;
1572 struct page
*page
= NULL
;
1573 struct nfs4_fs_locations
*locations
= NULL
;
1575 page
= alloc_page(GFP_KERNEL
);
1578 locations
= kmalloc(sizeof(struct nfs4_fs_locations
), GFP_KERNEL
);
1579 if (locations
== NULL
)
1582 status
= nfs4_proc_fs_locations(dir
, name
, locations
, page
);
1585 /* Make sure server returned a different fsid for the referral */
1586 if (nfs_fsid_equal(&NFS_SERVER(dir
)->fsid
, &locations
->fattr
.fsid
)) {
1587 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__
, name
->name
);
1592 memcpy(fattr
, &locations
->fattr
, sizeof(struct nfs_fattr
));
1593 fattr
->valid
|= NFS_ATTR_FATTR_V4_REFERRAL
;
1595 fattr
->mode
= S_IFDIR
;
1596 memset(fhandle
, 0, sizeof(struct nfs_fh
));
1605 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1607 struct nfs4_getattr_arg args
= {
1609 .bitmask
= server
->attr_bitmask
,
1611 struct nfs4_getattr_res res
= {
1615 struct rpc_message msg
= {
1616 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETATTR
],
1621 nfs_fattr_init(fattr
);
1622 return rpc_call_sync(server
->client
, &msg
, 0);
1625 static int nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1627 struct nfs4_exception exception
= { };
1630 err
= nfs4_handle_exception(server
,
1631 _nfs4_proc_getattr(server
, fhandle
, fattr
),
1633 } while (exception
.retry
);
1638 * The file is not closed if it is opened due to the a request to change
1639 * the size of the file. The open call will not be needed once the
1640 * VFS layer lookup-intents are implemented.
1642 * Close is called when the inode is destroyed.
1643 * If we haven't opened the file for O_WRONLY, we
1644 * need to in the size_change case to obtain a stateid.
1647 * Because OPEN is always done by name in nfsv4, it is
1648 * possible that we opened a different file by the same
1649 * name. We can recognize this race condition, but we
1650 * can't do anything about it besides returning an error.
1652 * This will be fixed with VFS changes (lookup-intent).
1655 nfs4_proc_setattr(struct dentry
*dentry
, struct nfs_fattr
*fattr
,
1656 struct iattr
*sattr
)
1658 struct rpc_cred
*cred
;
1659 struct inode
*inode
= dentry
->d_inode
;
1660 struct nfs_open_context
*ctx
;
1661 struct nfs4_state
*state
= NULL
;
1664 nfs_fattr_init(fattr
);
1666 cred
= rpcauth_lookupcred(NFS_CLIENT(inode
)->cl_auth
, 0);
1668 return PTR_ERR(cred
);
1670 /* Search for an existing open(O_WRITE) file */
1671 ctx
= nfs_find_open_context(inode
, cred
, FMODE_WRITE
);
1675 status
= nfs4_do_setattr(inode
, fattr
, sattr
, state
);
1677 nfs_setattr_update_inode(inode
, sattr
);
1679 put_nfs_open_context(ctx
);
1684 static int _nfs4_proc_lookupfh(struct nfs_server
*server
, const struct nfs_fh
*dirfh
,
1685 const struct qstr
*name
, struct nfs_fh
*fhandle
,
1686 struct nfs_fattr
*fattr
)
1689 struct nfs4_lookup_arg args
= {
1690 .bitmask
= server
->attr_bitmask
,
1694 struct nfs4_lookup_res res
= {
1699 struct rpc_message msg
= {
1700 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP
],
1705 nfs_fattr_init(fattr
);
1707 dprintk("NFS call lookupfh %s\n", name
->name
);
1708 status
= rpc_call_sync(server
->client
, &msg
, 0);
1709 dprintk("NFS reply lookupfh: %d\n", status
);
1713 static int nfs4_proc_lookupfh(struct nfs_server
*server
, struct nfs_fh
*dirfh
,
1714 struct qstr
*name
, struct nfs_fh
*fhandle
,
1715 struct nfs_fattr
*fattr
)
1717 struct nfs4_exception exception
= { };
1720 err
= _nfs4_proc_lookupfh(server
, dirfh
, name
, fhandle
, fattr
);
1722 if (err
== -NFS4ERR_MOVED
) {
1726 err
= nfs4_handle_exception(server
, err
, &exception
);
1727 } while (exception
.retry
);
1731 static int _nfs4_proc_lookup(struct inode
*dir
, const struct qstr
*name
,
1732 struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1736 dprintk("NFS call lookup %s\n", name
->name
);
1737 status
= _nfs4_proc_lookupfh(NFS_SERVER(dir
), NFS_FH(dir
), name
, fhandle
, fattr
);
1738 if (status
== -NFS4ERR_MOVED
)
1739 status
= nfs4_get_referral(dir
, name
, fattr
, fhandle
);
1740 dprintk("NFS reply lookup: %d\n", status
);
1744 static int nfs4_proc_lookup(struct inode
*dir
, struct qstr
*name
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1746 struct nfs4_exception exception
= { };
1749 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1750 _nfs4_proc_lookup(dir
, name
, fhandle
, fattr
),
1752 } while (exception
.retry
);
1756 static int _nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
1758 struct nfs_server
*server
= NFS_SERVER(inode
);
1759 struct nfs_fattr fattr
;
1760 struct nfs4_accessargs args
= {
1761 .fh
= NFS_FH(inode
),
1762 .bitmask
= server
->attr_bitmask
,
1764 struct nfs4_accessres res
= {
1768 struct rpc_message msg
= {
1769 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_ACCESS
],
1772 .rpc_cred
= entry
->cred
,
1774 int mode
= entry
->mask
;
1778 * Determine which access bits we want to ask for...
1780 if (mode
& MAY_READ
)
1781 args
.access
|= NFS4_ACCESS_READ
;
1782 if (S_ISDIR(inode
->i_mode
)) {
1783 if (mode
& MAY_WRITE
)
1784 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
;
1785 if (mode
& MAY_EXEC
)
1786 args
.access
|= NFS4_ACCESS_LOOKUP
;
1788 if (mode
& MAY_WRITE
)
1789 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
;
1790 if (mode
& MAY_EXEC
)
1791 args
.access
|= NFS4_ACCESS_EXECUTE
;
1793 nfs_fattr_init(&fattr
);
1794 status
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
1797 if (res
.access
& NFS4_ACCESS_READ
)
1798 entry
->mask
|= MAY_READ
;
1799 if (res
.access
& (NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
))
1800 entry
->mask
|= MAY_WRITE
;
1801 if (res
.access
& (NFS4_ACCESS_LOOKUP
|NFS4_ACCESS_EXECUTE
))
1802 entry
->mask
|= MAY_EXEC
;
1803 nfs_refresh_inode(inode
, &fattr
);
1808 static int nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
1810 struct nfs4_exception exception
= { };
1813 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1814 _nfs4_proc_access(inode
, entry
),
1816 } while (exception
.retry
);
1821 * TODO: For the time being, we don't try to get any attributes
1822 * along with any of the zero-copy operations READ, READDIR,
1825 * In the case of the first three, we want to put the GETATTR
1826 * after the read-type operation -- this is because it is hard
1827 * to predict the length of a GETATTR response in v4, and thus
1828 * align the READ data correctly. This means that the GETATTR
1829 * may end up partially falling into the page cache, and we should
1830 * shift it into the 'tail' of the xdr_buf before processing.
1831 * To do this efficiently, we need to know the total length
1832 * of data received, which doesn't seem to be available outside
1835 * In the case of WRITE, we also want to put the GETATTR after
1836 * the operation -- in this case because we want to make sure
1837 * we get the post-operation mtime and size. This means that
1838 * we can't use xdr_encode_pages() as written: we need a variant
1839 * of it which would leave room in the 'tail' iovec.
1841 * Both of these changes to the XDR layer would in fact be quite
1842 * minor, but I decided to leave them for a subsequent patch.
1844 static int _nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
1845 unsigned int pgbase
, unsigned int pglen
)
1847 struct nfs4_readlink args
= {
1848 .fh
= NFS_FH(inode
),
1853 struct rpc_message msg
= {
1854 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READLINK
],
1859 return rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
1862 static int nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
1863 unsigned int pgbase
, unsigned int pglen
)
1865 struct nfs4_exception exception
= { };
1868 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1869 _nfs4_proc_readlink(inode
, page
, pgbase
, pglen
),
1871 } while (exception
.retry
);
1877 * We will need to arrange for the VFS layer to provide an atomic open.
1878 * Until then, this create/open method is prone to inefficiency and race
1879 * conditions due to the lookup, create, and open VFS calls from sys_open()
1880 * placed on the wire.
1882 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1883 * The file will be opened again in the subsequent VFS open call
1884 * (nfs4_proc_file_open).
1886 * The open for read will just hang around to be used by any process that
1887 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1891 nfs4_proc_create(struct inode
*dir
, struct dentry
*dentry
, struct iattr
*sattr
,
1892 int flags
, struct nameidata
*nd
)
1894 struct path path
= {
1898 struct nfs4_state
*state
;
1899 struct rpc_cred
*cred
;
1902 cred
= rpcauth_lookupcred(NFS_CLIENT(dir
)->cl_auth
, 0);
1904 status
= PTR_ERR(cred
);
1907 state
= nfs4_do_open(dir
, &path
, flags
, sattr
, cred
);
1910 if (IS_ERR(state
)) {
1911 status
= PTR_ERR(state
);
1914 d_add(dentry
, igrab(state
->inode
));
1915 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
1916 if (flags
& O_EXCL
) {
1917 struct nfs_fattr fattr
;
1918 status
= nfs4_do_setattr(state
->inode
, &fattr
, sattr
, state
);
1920 nfs_setattr_update_inode(state
->inode
, sattr
);
1921 nfs_post_op_update_inode(state
->inode
, &fattr
);
1923 if (status
== 0 && (nd
->flags
& LOOKUP_OPEN
) != 0)
1924 status
= nfs4_intent_set_file(nd
, &path
, state
);
1926 nfs4_close_sync(&path
, state
, flags
);
1931 static int _nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
1933 struct nfs_server
*server
= NFS_SERVER(dir
);
1934 struct nfs_removeargs args
= {
1936 .name
.len
= name
->len
,
1937 .name
.name
= name
->name
,
1938 .bitmask
= server
->attr_bitmask
,
1940 struct nfs_removeres res
= {
1943 struct rpc_message msg
= {
1944 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
],
1950 nfs_fattr_init(&res
.dir_attr
);
1951 status
= rpc_call_sync(server
->client
, &msg
, 0);
1953 update_changeattr(dir
, &res
.cinfo
);
1954 nfs_post_op_update_inode(dir
, &res
.dir_attr
);
1959 static int nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
1961 struct nfs4_exception exception
= { };
1964 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1965 _nfs4_proc_remove(dir
, name
),
1967 } while (exception
.retry
);
1971 static void nfs4_proc_unlink_setup(struct rpc_message
*msg
, struct inode
*dir
)
1973 struct nfs_server
*server
= NFS_SERVER(dir
);
1974 struct nfs_removeargs
*args
= msg
->rpc_argp
;
1975 struct nfs_removeres
*res
= msg
->rpc_resp
;
1977 args
->bitmask
= server
->attr_bitmask
;
1978 res
->server
= server
;
1979 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
];
1982 static int nfs4_proc_unlink_done(struct rpc_task
*task
, struct inode
*dir
)
1984 struct nfs_removeres
*res
= task
->tk_msg
.rpc_resp
;
1986 if (nfs4_async_handle_error(task
, res
->server
) == -EAGAIN
)
1988 update_changeattr(dir
, &res
->cinfo
);
1989 nfs_post_op_update_inode(dir
, &res
->dir_attr
);
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
);
2230 nfs_invalidate_atime(dir
);
2232 dprintk("%s: returns %d\n", __FUNCTION__
, status
);
2236 static int nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2237 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2239 struct nfs4_exception exception
= { };
2242 err
= nfs4_handle_exception(NFS_SERVER(dentry
->d_inode
),
2243 _nfs4_proc_readdir(dentry
, cred
, cookie
,
2246 } while (exception
.retry
);
2250 static int _nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2251 struct iattr
*sattr
, dev_t rdev
)
2253 struct nfs_server
*server
= NFS_SERVER(dir
);
2255 struct nfs_fattr fattr
, dir_fattr
;
2256 struct nfs4_create_arg arg
= {
2257 .dir_fh
= NFS_FH(dir
),
2259 .name
= &dentry
->d_name
,
2261 .bitmask
= server
->attr_bitmask
,
2263 struct nfs4_create_res res
= {
2267 .dir_fattr
= &dir_fattr
,
2269 struct rpc_message msg
= {
2270 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
],
2275 int mode
= sattr
->ia_mode
;
2277 nfs_fattr_init(&fattr
);
2278 nfs_fattr_init(&dir_fattr
);
2280 BUG_ON(!(sattr
->ia_valid
& ATTR_MODE
));
2281 BUG_ON(!S_ISFIFO(mode
) && !S_ISBLK(mode
) && !S_ISCHR(mode
) && !S_ISSOCK(mode
));
2283 arg
.ftype
= NF4FIFO
;
2284 else if (S_ISBLK(mode
)) {
2286 arg
.u
.device
.specdata1
= MAJOR(rdev
);
2287 arg
.u
.device
.specdata2
= MINOR(rdev
);
2289 else if (S_ISCHR(mode
)) {
2291 arg
.u
.device
.specdata1
= MAJOR(rdev
);
2292 arg
.u
.device
.specdata2
= MINOR(rdev
);
2295 arg
.ftype
= NF4SOCK
;
2297 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
2299 update_changeattr(dir
, &res
.dir_cinfo
);
2300 nfs_post_op_update_inode(dir
, res
.dir_fattr
);
2301 status
= nfs_instantiate(dentry
, &fh
, &fattr
);
2306 static int nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2307 struct iattr
*sattr
, dev_t rdev
)
2309 struct nfs4_exception exception
= { };
2312 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2313 _nfs4_proc_mknod(dir
, dentry
, sattr
, rdev
),
2315 } while (exception
.retry
);
2319 static int _nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2320 struct nfs_fsstat
*fsstat
)
2322 struct nfs4_statfs_arg args
= {
2324 .bitmask
= server
->attr_bitmask
,
2326 struct rpc_message msg
= {
2327 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_STATFS
],
2332 nfs_fattr_init(fsstat
->fattr
);
2333 return rpc_call_sync(server
->client
, &msg
, 0);
2336 static int nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsstat
*fsstat
)
2338 struct nfs4_exception exception
= { };
2341 err
= nfs4_handle_exception(server
,
2342 _nfs4_proc_statfs(server
, fhandle
, fsstat
),
2344 } while (exception
.retry
);
2348 static int _nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2349 struct nfs_fsinfo
*fsinfo
)
2351 struct nfs4_fsinfo_arg args
= {
2353 .bitmask
= server
->attr_bitmask
,
2355 struct rpc_message msg
= {
2356 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FSINFO
],
2361 return rpc_call_sync(server
->client
, &msg
, 0);
2364 static int nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2366 struct nfs4_exception exception
= { };
2370 err
= nfs4_handle_exception(server
,
2371 _nfs4_do_fsinfo(server
, fhandle
, fsinfo
),
2373 } while (exception
.retry
);
2377 static int nfs4_proc_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2379 nfs_fattr_init(fsinfo
->fattr
);
2380 return nfs4_do_fsinfo(server
, fhandle
, fsinfo
);
2383 static int _nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2384 struct nfs_pathconf
*pathconf
)
2386 struct nfs4_pathconf_arg args
= {
2388 .bitmask
= server
->attr_bitmask
,
2390 struct rpc_message msg
= {
2391 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_PATHCONF
],
2393 .rpc_resp
= pathconf
,
2396 /* None of the pathconf attributes are mandatory to implement */
2397 if ((args
.bitmask
[0] & nfs4_pathconf_bitmap
[0]) == 0) {
2398 memset(pathconf
, 0, sizeof(*pathconf
));
2402 nfs_fattr_init(pathconf
->fattr
);
2403 return rpc_call_sync(server
->client
, &msg
, 0);
2406 static int nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2407 struct nfs_pathconf
*pathconf
)
2409 struct nfs4_exception exception
= { };
2413 err
= nfs4_handle_exception(server
,
2414 _nfs4_proc_pathconf(server
, fhandle
, pathconf
),
2416 } while (exception
.retry
);
2420 static int nfs4_read_done(struct rpc_task
*task
, struct nfs_read_data
*data
)
2422 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2424 if (nfs4_async_handle_error(task
, server
) == -EAGAIN
) {
2425 rpc_restart_call(task
);
2429 nfs_invalidate_atime(data
->inode
);
2430 if (task
->tk_status
> 0)
2431 renew_lease(server
, data
->timestamp
);
2435 static void nfs4_proc_read_setup(struct nfs_read_data
*data
)
2437 struct rpc_message msg
= {
2438 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READ
],
2439 .rpc_argp
= &data
->args
,
2440 .rpc_resp
= &data
->res
,
2441 .rpc_cred
= data
->cred
,
2444 data
->timestamp
= jiffies
;
2446 rpc_call_setup(&data
->task
, &msg
, 0);
2449 static int nfs4_write_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
2451 struct inode
*inode
= data
->inode
;
2453 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
)) == -EAGAIN
) {
2454 rpc_restart_call(task
);
2457 if (task
->tk_status
>= 0) {
2458 renew_lease(NFS_SERVER(inode
), data
->timestamp
);
2459 nfs_post_op_update_inode_force_wcc(inode
, data
->res
.fattr
);
2464 static void nfs4_proc_write_setup(struct nfs_write_data
*data
, int how
)
2466 struct rpc_message msg
= {
2467 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_WRITE
],
2468 .rpc_argp
= &data
->args
,
2469 .rpc_resp
= &data
->res
,
2470 .rpc_cred
= data
->cred
,
2472 struct inode
*inode
= data
->inode
;
2473 struct nfs_server
*server
= NFS_SERVER(inode
);
2476 if (how
& FLUSH_STABLE
) {
2477 if (!NFS_I(inode
)->ncommit
)
2478 stable
= NFS_FILE_SYNC
;
2480 stable
= NFS_DATA_SYNC
;
2482 stable
= NFS_UNSTABLE
;
2483 data
->args
.stable
= stable
;
2484 data
->args
.bitmask
= server
->attr_bitmask
;
2485 data
->res
.server
= server
;
2487 data
->timestamp
= jiffies
;
2489 /* Finalize the task. */
2490 rpc_call_setup(&data
->task
, &msg
, 0);
2493 static int nfs4_commit_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
2495 struct inode
*inode
= data
->inode
;
2497 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
)) == -EAGAIN
) {
2498 rpc_restart_call(task
);
2501 nfs_refresh_inode(inode
, data
->res
.fattr
);
2505 static void nfs4_proc_commit_setup(struct nfs_write_data
*data
, int how
)
2507 struct rpc_message msg
= {
2508 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_COMMIT
],
2509 .rpc_argp
= &data
->args
,
2510 .rpc_resp
= &data
->res
,
2511 .rpc_cred
= data
->cred
,
2513 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2515 data
->args
.bitmask
= server
->attr_bitmask
;
2516 data
->res
.server
= server
;
2518 rpc_call_setup(&data
->task
, &msg
, 0);
2522 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2523 * standalone procedure for queueing an asynchronous RENEW.
2525 static void nfs4_renew_done(struct rpc_task
*task
, void *data
)
2527 struct nfs_client
*clp
= (struct nfs_client
*)task
->tk_msg
.rpc_argp
;
2528 unsigned long timestamp
= (unsigned long)data
;
2530 if (task
->tk_status
< 0) {
2531 switch (task
->tk_status
) {
2532 case -NFS4ERR_STALE_CLIENTID
:
2533 case -NFS4ERR_EXPIRED
:
2534 case -NFS4ERR_CB_PATH_DOWN
:
2535 nfs4_schedule_state_recovery(clp
);
2539 spin_lock(&clp
->cl_lock
);
2540 if (time_before(clp
->cl_last_renewal
,timestamp
))
2541 clp
->cl_last_renewal
= timestamp
;
2542 spin_unlock(&clp
->cl_lock
);
2545 static const struct rpc_call_ops nfs4_renew_ops
= {
2546 .rpc_call_done
= nfs4_renew_done
,
2549 int nfs4_proc_async_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2551 struct rpc_message msg
= {
2552 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2557 return rpc_call_async(clp
->cl_rpcclient
, &msg
, RPC_TASK_SOFT
,
2558 &nfs4_renew_ops
, (void *)jiffies
);
2561 int nfs4_proc_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2563 struct rpc_message msg
= {
2564 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2568 unsigned long now
= jiffies
;
2571 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2574 spin_lock(&clp
->cl_lock
);
2575 if (time_before(clp
->cl_last_renewal
,now
))
2576 clp
->cl_last_renewal
= now
;
2577 spin_unlock(&clp
->cl_lock
);
2581 static inline int nfs4_server_supports_acls(struct nfs_server
*server
)
2583 return (server
->caps
& NFS_CAP_ACLS
)
2584 && (server
->acl_bitmask
& ACL4_SUPPORT_ALLOW_ACL
)
2585 && (server
->acl_bitmask
& ACL4_SUPPORT_DENY_ACL
);
2588 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2589 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2592 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2594 static void buf_to_pages(const void *buf
, size_t buflen
,
2595 struct page
**pages
, unsigned int *pgbase
)
2597 const void *p
= buf
;
2599 *pgbase
= offset_in_page(buf
);
2601 while (p
< buf
+ buflen
) {
2602 *(pages
++) = virt_to_page(p
);
2603 p
+= PAGE_CACHE_SIZE
;
2607 struct nfs4_cached_acl
{
2613 static void nfs4_set_cached_acl(struct inode
*inode
, struct nfs4_cached_acl
*acl
)
2615 struct nfs_inode
*nfsi
= NFS_I(inode
);
2617 spin_lock(&inode
->i_lock
);
2618 kfree(nfsi
->nfs4_acl
);
2619 nfsi
->nfs4_acl
= acl
;
2620 spin_unlock(&inode
->i_lock
);
2623 static void nfs4_zap_acl_attr(struct inode
*inode
)
2625 nfs4_set_cached_acl(inode
, NULL
);
2628 static inline ssize_t
nfs4_read_cached_acl(struct inode
*inode
, char *buf
, size_t buflen
)
2630 struct nfs_inode
*nfsi
= NFS_I(inode
);
2631 struct nfs4_cached_acl
*acl
;
2634 spin_lock(&inode
->i_lock
);
2635 acl
= nfsi
->nfs4_acl
;
2638 if (buf
== NULL
) /* user is just asking for length */
2640 if (acl
->cached
== 0)
2642 ret
= -ERANGE
; /* see getxattr(2) man page */
2643 if (acl
->len
> buflen
)
2645 memcpy(buf
, acl
->data
, acl
->len
);
2649 spin_unlock(&inode
->i_lock
);
2653 static void nfs4_write_cached_acl(struct inode
*inode
, const char *buf
, size_t acl_len
)
2655 struct nfs4_cached_acl
*acl
;
2657 if (buf
&& acl_len
<= PAGE_SIZE
) {
2658 acl
= kmalloc(sizeof(*acl
) + acl_len
, GFP_KERNEL
);
2662 memcpy(acl
->data
, buf
, acl_len
);
2664 acl
= kmalloc(sizeof(*acl
), GFP_KERNEL
);
2671 nfs4_set_cached_acl(inode
, acl
);
2674 static ssize_t
__nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
2676 struct page
*pages
[NFS4ACL_MAXPAGES
];
2677 struct nfs_getaclargs args
= {
2678 .fh
= NFS_FH(inode
),
2682 size_t resp_len
= buflen
;
2684 struct rpc_message msg
= {
2685 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETACL
],
2687 .rpc_resp
= &resp_len
,
2689 struct page
*localpage
= NULL
;
2692 if (buflen
< PAGE_SIZE
) {
2693 /* As long as we're doing a round trip to the server anyway,
2694 * let's be prepared for a page of acl data. */
2695 localpage
= alloc_page(GFP_KERNEL
);
2696 resp_buf
= page_address(localpage
);
2697 if (localpage
== NULL
)
2699 args
.acl_pages
[0] = localpage
;
2700 args
.acl_pgbase
= 0;
2701 resp_len
= args
.acl_len
= PAGE_SIZE
;
2704 buf_to_pages(buf
, buflen
, args
.acl_pages
, &args
.acl_pgbase
);
2706 ret
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
2709 if (resp_len
> args
.acl_len
)
2710 nfs4_write_cached_acl(inode
, NULL
, resp_len
);
2712 nfs4_write_cached_acl(inode
, resp_buf
, resp_len
);
2715 if (resp_len
> buflen
)
2718 memcpy(buf
, resp_buf
, resp_len
);
2723 __free_page(localpage
);
2727 static ssize_t
nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
2729 struct nfs4_exception exception
= { };
2732 ret
= __nfs4_get_acl_uncached(inode
, buf
, buflen
);
2735 ret
= nfs4_handle_exception(NFS_SERVER(inode
), ret
, &exception
);
2736 } while (exception
.retry
);
2740 static ssize_t
nfs4_proc_get_acl(struct inode
*inode
, void *buf
, size_t buflen
)
2742 struct nfs_server
*server
= NFS_SERVER(inode
);
2745 if (!nfs4_server_supports_acls(server
))
2747 ret
= nfs_revalidate_inode(server
, inode
);
2750 ret
= nfs4_read_cached_acl(inode
, buf
, buflen
);
2753 return nfs4_get_acl_uncached(inode
, buf
, buflen
);
2756 static int __nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
2758 struct nfs_server
*server
= NFS_SERVER(inode
);
2759 struct page
*pages
[NFS4ACL_MAXPAGES
];
2760 struct nfs_setaclargs arg
= {
2761 .fh
= NFS_FH(inode
),
2765 struct rpc_message msg
= {
2766 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETACL
],
2772 if (!nfs4_server_supports_acls(server
))
2774 nfs_inode_return_delegation(inode
);
2775 buf_to_pages(buf
, buflen
, arg
.acl_pages
, &arg
.acl_pgbase
);
2776 ret
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
2777 nfs_zap_caches(inode
);
2781 static int nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
2783 struct nfs4_exception exception
= { };
2786 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2787 __nfs4_proc_set_acl(inode
, buf
, buflen
),
2789 } while (exception
.retry
);
2794 nfs4_async_handle_error(struct rpc_task
*task
, const struct nfs_server
*server
)
2796 struct nfs_client
*clp
= server
->nfs_client
;
2798 if (!clp
|| task
->tk_status
>= 0)
2800 switch(task
->tk_status
) {
2801 case -NFS4ERR_STALE_CLIENTID
:
2802 case -NFS4ERR_STALE_STATEID
:
2803 case -NFS4ERR_EXPIRED
:
2804 rpc_sleep_on(&clp
->cl_rpcwaitq
, task
, NULL
, NULL
);
2805 nfs4_schedule_state_recovery(clp
);
2806 if (test_bit(NFS4CLNT_STATE_RECOVER
, &clp
->cl_state
) == 0)
2807 rpc_wake_up_task(task
);
2808 task
->tk_status
= 0;
2810 case -NFS4ERR_DELAY
:
2811 nfs_inc_server_stats((struct nfs_server
*) server
,
2813 case -NFS4ERR_GRACE
:
2814 rpc_delay(task
, NFS4_POLL_RETRY_MAX
);
2815 task
->tk_status
= 0;
2817 case -NFS4ERR_OLD_STATEID
:
2818 task
->tk_status
= 0;
2821 task
->tk_status
= nfs4_map_errors(task
->tk_status
);
2825 static int nfs4_wait_bit_interruptible(void *word
)
2827 if (signal_pending(current
))
2828 return -ERESTARTSYS
;
2833 static int nfs4_wait_clnt_recover(struct rpc_clnt
*clnt
, struct nfs_client
*clp
)
2840 rwsem_acquire(&clp
->cl_sem
.dep_map
, 0, 0, _RET_IP_
);
2842 rpc_clnt_sigmask(clnt
, &oldset
);
2843 res
= wait_on_bit(&clp
->cl_state
, NFS4CLNT_STATE_RECOVER
,
2844 nfs4_wait_bit_interruptible
,
2845 TASK_INTERRUPTIBLE
);
2846 rpc_clnt_sigunmask(clnt
, &oldset
);
2848 rwsem_release(&clp
->cl_sem
.dep_map
, 1, _RET_IP_
);
2852 static int nfs4_delay(struct rpc_clnt
*clnt
, long *timeout
)
2860 *timeout
= NFS4_POLL_RETRY_MIN
;
2861 if (*timeout
> NFS4_POLL_RETRY_MAX
)
2862 *timeout
= NFS4_POLL_RETRY_MAX
;
2863 rpc_clnt_sigmask(clnt
, &oldset
);
2864 if (clnt
->cl_intr
) {
2865 schedule_timeout_interruptible(*timeout
);
2869 schedule_timeout_uninterruptible(*timeout
);
2870 rpc_clnt_sigunmask(clnt
, &oldset
);
2875 /* This is the error handling routine for processes that are allowed
2878 static int nfs4_handle_exception(const struct nfs_server
*server
, int errorcode
, struct nfs4_exception
*exception
)
2880 struct nfs_client
*clp
= server
->nfs_client
;
2881 int ret
= errorcode
;
2883 exception
->retry
= 0;
2887 case -NFS4ERR_STALE_CLIENTID
:
2888 case -NFS4ERR_STALE_STATEID
:
2889 case -NFS4ERR_EXPIRED
:
2890 nfs4_schedule_state_recovery(clp
);
2891 ret
= nfs4_wait_clnt_recover(server
->client
, clp
);
2893 exception
->retry
= 1;
2895 case -NFS4ERR_FILE_OPEN
:
2896 case -NFS4ERR_GRACE
:
2897 case -NFS4ERR_DELAY
:
2898 ret
= nfs4_delay(server
->client
, &exception
->timeout
);
2901 case -NFS4ERR_OLD_STATEID
:
2902 exception
->retry
= 1;
2904 /* We failed to handle the error */
2905 return nfs4_map_errors(ret
);
2908 int nfs4_proc_setclientid(struct nfs_client
*clp
, u32 program
, unsigned short port
, struct rpc_cred
*cred
)
2910 nfs4_verifier sc_verifier
;
2911 struct nfs4_setclientid setclientid
= {
2912 .sc_verifier
= &sc_verifier
,
2915 struct rpc_message msg
= {
2916 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID
],
2917 .rpc_argp
= &setclientid
,
2925 p
= (__be32
*)sc_verifier
.data
;
2926 *p
++ = htonl((u32
)clp
->cl_boot_time
.tv_sec
);
2927 *p
= htonl((u32
)clp
->cl_boot_time
.tv_nsec
);
2930 setclientid
.sc_name_len
= scnprintf(setclientid
.sc_name
,
2931 sizeof(setclientid
.sc_name
), "%s/%u.%u.%u.%u %s %u",
2932 clp
->cl_ipaddr
, NIPQUAD(clp
->cl_addr
.sin_addr
),
2933 cred
->cr_ops
->cr_name
,
2934 clp
->cl_id_uniquifier
);
2935 setclientid
.sc_netid_len
= scnprintf(setclientid
.sc_netid
,
2936 sizeof(setclientid
.sc_netid
), "tcp");
2937 setclientid
.sc_uaddr_len
= scnprintf(setclientid
.sc_uaddr
,
2938 sizeof(setclientid
.sc_uaddr
), "%s.%d.%d",
2939 clp
->cl_ipaddr
, port
>> 8, port
& 255);
2941 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2942 if (status
!= -NFS4ERR_CLID_INUSE
)
2947 ssleep(clp
->cl_lease_time
+ 1);
2949 if (++clp
->cl_id_uniquifier
== 0)
2955 static int _nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2957 struct nfs_fsinfo fsinfo
;
2958 struct rpc_message msg
= {
2959 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID_CONFIRM
],
2961 .rpc_resp
= &fsinfo
,
2968 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2970 spin_lock(&clp
->cl_lock
);
2971 clp
->cl_lease_time
= fsinfo
.lease_time
* HZ
;
2972 clp
->cl_last_renewal
= now
;
2973 clear_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
2974 spin_unlock(&clp
->cl_lock
);
2979 int nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2984 err
= _nfs4_proc_setclientid_confirm(clp
, cred
);
2988 case -NFS4ERR_RESOURCE
:
2989 /* The IBM lawyers misread another document! */
2990 case -NFS4ERR_DELAY
:
2991 err
= nfs4_delay(clp
->cl_rpcclient
, &timeout
);
2997 struct nfs4_delegreturndata
{
2998 struct nfs4_delegreturnargs args
;
2999 struct nfs4_delegreturnres res
;
3001 nfs4_stateid stateid
;
3002 struct rpc_cred
*cred
;
3003 unsigned long timestamp
;
3004 struct nfs_fattr fattr
;
3008 static void nfs4_delegreturn_prepare(struct rpc_task
*task
, void *calldata
)
3010 struct nfs4_delegreturndata
*data
= calldata
;
3011 struct rpc_message msg
= {
3012 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DELEGRETURN
],
3013 .rpc_argp
= &data
->args
,
3014 .rpc_resp
= &data
->res
,
3015 .rpc_cred
= data
->cred
,
3017 nfs_fattr_init(data
->res
.fattr
);
3018 rpc_call_setup(task
, &msg
, 0);
3021 static void nfs4_delegreturn_done(struct rpc_task
*task
, void *calldata
)
3023 struct nfs4_delegreturndata
*data
= calldata
;
3024 data
->rpc_status
= task
->tk_status
;
3025 if (data
->rpc_status
== 0)
3026 renew_lease(data
->res
.server
, data
->timestamp
);
3029 static void nfs4_delegreturn_release(void *calldata
)
3031 struct nfs4_delegreturndata
*data
= calldata
;
3033 put_rpccred(data
->cred
);
3037 static const struct rpc_call_ops nfs4_delegreturn_ops
= {
3038 .rpc_call_prepare
= nfs4_delegreturn_prepare
,
3039 .rpc_call_done
= nfs4_delegreturn_done
,
3040 .rpc_release
= nfs4_delegreturn_release
,
3043 static int _nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
)
3045 struct nfs4_delegreturndata
*data
;
3046 struct nfs_server
*server
= NFS_SERVER(inode
);
3047 struct rpc_task
*task
;
3048 struct rpc_task_setup task_setup_data
= {
3049 .rpc_client
= server
->client
,
3050 .callback_ops
= &nfs4_delegreturn_ops
,
3051 .flags
= RPC_TASK_ASYNC
,
3055 data
= kmalloc(sizeof(*data
), GFP_KERNEL
);
3058 data
->args
.fhandle
= &data
->fh
;
3059 data
->args
.stateid
= &data
->stateid
;
3060 data
->args
.bitmask
= server
->attr_bitmask
;
3061 nfs_copy_fh(&data
->fh
, NFS_FH(inode
));
3062 memcpy(&data
->stateid
, stateid
, sizeof(data
->stateid
));
3063 data
->res
.fattr
= &data
->fattr
;
3064 data
->res
.server
= server
;
3065 data
->cred
= get_rpccred(cred
);
3066 data
->timestamp
= jiffies
;
3067 data
->rpc_status
= 0;
3069 task_setup_data
.callback_data
= data
;
3070 task
= rpc_run_task(&task_setup_data
);
3072 return PTR_ERR(task
);
3073 status
= nfs4_wait_for_completion_rpc_task(task
);
3075 status
= data
->rpc_status
;
3077 nfs_refresh_inode(inode
, &data
->fattr
);
3083 int nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
)
3085 struct nfs_server
*server
= NFS_SERVER(inode
);
3086 struct nfs4_exception exception
= { };
3089 err
= _nfs4_proc_delegreturn(inode
, cred
, stateid
);
3091 case -NFS4ERR_STALE_STATEID
:
3092 case -NFS4ERR_EXPIRED
:
3096 err
= nfs4_handle_exception(server
, err
, &exception
);
3097 } while (exception
.retry
);
3101 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3102 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3105 * sleep, with exponential backoff, and retry the LOCK operation.
3107 static unsigned long
3108 nfs4_set_lock_task_retry(unsigned long timeout
)
3110 schedule_timeout_interruptible(timeout
);
3112 if (timeout
> NFS4_LOCK_MAXTIMEOUT
)
3113 return NFS4_LOCK_MAXTIMEOUT
;
3117 static int _nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3119 struct inode
*inode
= state
->inode
;
3120 struct nfs_server
*server
= NFS_SERVER(inode
);
3121 struct nfs_client
*clp
= server
->nfs_client
;
3122 struct nfs_lockt_args arg
= {
3123 .fh
= NFS_FH(inode
),
3126 struct nfs_lockt_res res
= {
3129 struct rpc_message msg
= {
3130 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKT
],
3133 .rpc_cred
= state
->owner
->so_cred
,
3135 struct nfs4_lock_state
*lsp
;
3138 down_read(&clp
->cl_sem
);
3139 arg
.lock_owner
.clientid
= clp
->cl_clientid
;
3140 status
= nfs4_set_lock_state(state
, request
);
3143 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3144 arg
.lock_owner
.id
= lsp
->ls_id
.id
;
3145 status
= rpc_call_sync(server
->client
, &msg
, 0);
3148 request
->fl_type
= F_UNLCK
;
3150 case -NFS4ERR_DENIED
:
3153 request
->fl_ops
->fl_release_private(request
);
3155 up_read(&clp
->cl_sem
);
3159 static int nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3161 struct nfs4_exception exception
= { };
3165 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3166 _nfs4_proc_getlk(state
, cmd
, request
),
3168 } while (exception
.retry
);
3172 static int do_vfs_lock(struct file
*file
, struct file_lock
*fl
)
3175 switch (fl
->fl_flags
& (FL_POSIX
|FL_FLOCK
)) {
3177 res
= posix_lock_file_wait(file
, fl
);
3180 res
= flock_lock_file_wait(file
, fl
);
3188 struct nfs4_unlockdata
{
3189 struct nfs_locku_args arg
;
3190 struct nfs_locku_res res
;
3191 struct nfs4_lock_state
*lsp
;
3192 struct nfs_open_context
*ctx
;
3193 struct file_lock fl
;
3194 const struct nfs_server
*server
;
3195 unsigned long timestamp
;
3198 static struct nfs4_unlockdata
*nfs4_alloc_unlockdata(struct file_lock
*fl
,
3199 struct nfs_open_context
*ctx
,
3200 struct nfs4_lock_state
*lsp
,
3201 struct nfs_seqid
*seqid
)
3203 struct nfs4_unlockdata
*p
;
3204 struct inode
*inode
= lsp
->ls_state
->inode
;
3206 p
= kmalloc(sizeof(*p
), GFP_KERNEL
);
3209 p
->arg
.fh
= NFS_FH(inode
);
3211 p
->arg
.seqid
= seqid
;
3212 p
->arg
.stateid
= &lsp
->ls_stateid
;
3214 atomic_inc(&lsp
->ls_count
);
3215 /* Ensure we don't close file until we're done freeing locks! */
3216 p
->ctx
= get_nfs_open_context(ctx
);
3217 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3218 p
->server
= NFS_SERVER(inode
);
3222 static void nfs4_locku_release_calldata(void *data
)
3224 struct nfs4_unlockdata
*calldata
= data
;
3225 nfs_free_seqid(calldata
->arg
.seqid
);
3226 nfs4_put_lock_state(calldata
->lsp
);
3227 put_nfs_open_context(calldata
->ctx
);
3231 static void nfs4_locku_done(struct rpc_task
*task
, void *data
)
3233 struct nfs4_unlockdata
*calldata
= data
;
3235 if (RPC_ASSASSINATED(task
))
3237 nfs_increment_lock_seqid(task
->tk_status
, calldata
->arg
.seqid
);
3238 switch (task
->tk_status
) {
3240 memcpy(calldata
->lsp
->ls_stateid
.data
,
3241 calldata
->res
.stateid
.data
,
3242 sizeof(calldata
->lsp
->ls_stateid
.data
));
3243 renew_lease(calldata
->server
, calldata
->timestamp
);
3245 case -NFS4ERR_STALE_STATEID
:
3246 case -NFS4ERR_EXPIRED
:
3249 if (nfs4_async_handle_error(task
, calldata
->server
) == -EAGAIN
)
3250 rpc_restart_call(task
);
3254 static void nfs4_locku_prepare(struct rpc_task
*task
, void *data
)
3256 struct nfs4_unlockdata
*calldata
= data
;
3257 struct rpc_message msg
= {
3258 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKU
],
3259 .rpc_argp
= &calldata
->arg
,
3260 .rpc_resp
= &calldata
->res
,
3261 .rpc_cred
= calldata
->lsp
->ls_state
->owner
->so_cred
,
3264 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
3266 if ((calldata
->lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) == 0) {
3267 /* Note: exit _without_ running nfs4_locku_done */
3268 task
->tk_action
= NULL
;
3271 calldata
->timestamp
= jiffies
;
3272 rpc_call_setup(task
, &msg
, 0);
3275 static const struct rpc_call_ops nfs4_locku_ops
= {
3276 .rpc_call_prepare
= nfs4_locku_prepare
,
3277 .rpc_call_done
= nfs4_locku_done
,
3278 .rpc_release
= nfs4_locku_release_calldata
,
3281 static struct rpc_task
*nfs4_do_unlck(struct file_lock
*fl
,
3282 struct nfs_open_context
*ctx
,
3283 struct nfs4_lock_state
*lsp
,
3284 struct nfs_seqid
*seqid
)
3286 struct nfs4_unlockdata
*data
;
3287 struct rpc_task_setup task_setup_data
= {
3288 .rpc_client
= NFS_CLIENT(lsp
->ls_state
->inode
),
3289 .callback_ops
= &nfs4_locku_ops
,
3290 .flags
= RPC_TASK_ASYNC
,
3293 /* Ensure this is an unlock - when canceling a lock, the
3294 * canceled lock is passed in, and it won't be an unlock.
3296 fl
->fl_type
= F_UNLCK
;
3298 data
= nfs4_alloc_unlockdata(fl
, ctx
, lsp
, seqid
);
3300 nfs_free_seqid(seqid
);
3301 return ERR_PTR(-ENOMEM
);
3304 task_setup_data
.callback_data
= data
;
3305 return rpc_run_task(&task_setup_data
);
3308 static int nfs4_proc_unlck(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3310 struct nfs_seqid
*seqid
;
3311 struct nfs4_lock_state
*lsp
;
3312 struct rpc_task
*task
;
3315 status
= nfs4_set_lock_state(state
, request
);
3316 /* Unlock _before_ we do the RPC call */
3317 request
->fl_flags
|= FL_EXISTS
;
3318 if (do_vfs_lock(request
->fl_file
, request
) == -ENOENT
)
3322 /* Is this a delegated lock? */
3323 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
3325 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3326 seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3330 task
= nfs4_do_unlck(request
, nfs_file_open_context(request
->fl_file
), lsp
, seqid
);
3331 status
= PTR_ERR(task
);
3334 status
= nfs4_wait_for_completion_rpc_task(task
);
3340 struct nfs4_lockdata
{
3341 struct nfs_lock_args arg
;
3342 struct nfs_lock_res res
;
3343 struct nfs4_lock_state
*lsp
;
3344 struct nfs_open_context
*ctx
;
3345 struct file_lock fl
;
3346 unsigned long timestamp
;
3351 static struct nfs4_lockdata
*nfs4_alloc_lockdata(struct file_lock
*fl
,
3352 struct nfs_open_context
*ctx
, struct nfs4_lock_state
*lsp
)
3354 struct nfs4_lockdata
*p
;
3355 struct inode
*inode
= lsp
->ls_state
->inode
;
3356 struct nfs_server
*server
= NFS_SERVER(inode
);
3358 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
3362 p
->arg
.fh
= NFS_FH(inode
);
3364 p
->arg
.open_seqid
= nfs_alloc_seqid(&lsp
->ls_state
->owner
->so_seqid
);
3365 if (p
->arg
.open_seqid
== NULL
)
3367 p
->arg
.lock_seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3368 if (p
->arg
.lock_seqid
== NULL
)
3369 goto out_free_seqid
;
3370 p
->arg
.lock_stateid
= &lsp
->ls_stateid
;
3371 p
->arg
.lock_owner
.clientid
= server
->nfs_client
->cl_clientid
;
3372 p
->arg
.lock_owner
.id
= lsp
->ls_id
.id
;
3374 atomic_inc(&lsp
->ls_count
);
3375 p
->ctx
= get_nfs_open_context(ctx
);
3376 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3379 nfs_free_seqid(p
->arg
.open_seqid
);
3385 static void nfs4_lock_prepare(struct rpc_task
*task
, void *calldata
)
3387 struct nfs4_lockdata
*data
= calldata
;
3388 struct nfs4_state
*state
= data
->lsp
->ls_state
;
3389 struct nfs4_state_owner
*sp
= state
->owner
;
3390 struct rpc_message msg
= {
3391 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCK
],
3392 .rpc_argp
= &data
->arg
,
3393 .rpc_resp
= &data
->res
,
3394 .rpc_cred
= sp
->so_cred
,
3397 dprintk("%s: begin!\n", __FUNCTION__
);
3398 if (nfs_wait_on_sequence(data
->arg
.lock_seqid
, task
) != 0)
3400 /* Do we need to do an open_to_lock_owner? */
3401 if (!(data
->arg
.lock_seqid
->sequence
->flags
& NFS_SEQID_CONFIRMED
)) {
3402 if (nfs_wait_on_sequence(data
->arg
.open_seqid
, task
) != 0)
3404 data
->arg
.open_stateid
= &state
->stateid
;
3405 data
->arg
.new_lock_owner
= 1;
3407 data
->arg
.new_lock_owner
= 0;
3408 data
->timestamp
= jiffies
;
3409 rpc_call_setup(task
, &msg
, 0);
3410 dprintk("%s: done!, ret = %d\n", __FUNCTION__
, data
->rpc_status
);
3413 static void nfs4_lock_done(struct rpc_task
*task
, void *calldata
)
3415 struct nfs4_lockdata
*data
= calldata
;
3417 dprintk("%s: begin!\n", __FUNCTION__
);
3419 data
->rpc_status
= task
->tk_status
;
3420 if (RPC_ASSASSINATED(task
))
3422 if (data
->arg
.new_lock_owner
!= 0) {
3423 nfs_increment_open_seqid(data
->rpc_status
, data
->arg
.open_seqid
);
3424 if (data
->rpc_status
== 0)
3425 nfs_confirm_seqid(&data
->lsp
->ls_seqid
, 0);
3429 if (data
->rpc_status
== 0) {
3430 memcpy(data
->lsp
->ls_stateid
.data
, data
->res
.stateid
.data
,
3431 sizeof(data
->lsp
->ls_stateid
.data
));
3432 data
->lsp
->ls_flags
|= NFS_LOCK_INITIALIZED
;
3433 renew_lease(NFS_SERVER(data
->ctx
->path
.dentry
->d_inode
), data
->timestamp
);
3435 nfs_increment_lock_seqid(data
->rpc_status
, data
->arg
.lock_seqid
);
3437 dprintk("%s: done, ret = %d!\n", __FUNCTION__
, data
->rpc_status
);
3440 static void nfs4_lock_release(void *calldata
)
3442 struct nfs4_lockdata
*data
= calldata
;
3444 dprintk("%s: begin!\n", __FUNCTION__
);
3445 nfs_free_seqid(data
->arg
.open_seqid
);
3446 if (data
->cancelled
!= 0) {
3447 struct rpc_task
*task
;
3448 task
= nfs4_do_unlck(&data
->fl
, data
->ctx
, data
->lsp
,
3449 data
->arg
.lock_seqid
);
3452 dprintk("%s: cancelling lock!\n", __FUNCTION__
);
3454 nfs_free_seqid(data
->arg
.lock_seqid
);
3455 nfs4_put_lock_state(data
->lsp
);
3456 put_nfs_open_context(data
->ctx
);
3458 dprintk("%s: done!\n", __FUNCTION__
);
3461 static const struct rpc_call_ops nfs4_lock_ops
= {
3462 .rpc_call_prepare
= nfs4_lock_prepare
,
3463 .rpc_call_done
= nfs4_lock_done
,
3464 .rpc_release
= nfs4_lock_release
,
3467 static int _nfs4_do_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*fl
, int reclaim
)
3469 struct nfs4_lockdata
*data
;
3470 struct rpc_task
*task
;
3471 struct rpc_task_setup task_setup_data
= {
3472 .rpc_client
= NFS_CLIENT(state
->inode
),
3473 .callback_ops
= &nfs4_lock_ops
,
3474 .flags
= RPC_TASK_ASYNC
,
3478 dprintk("%s: begin!\n", __FUNCTION__
);
3479 data
= nfs4_alloc_lockdata(fl
, nfs_file_open_context(fl
->fl_file
),
3480 fl
->fl_u
.nfs4_fl
.owner
);
3484 data
->arg
.block
= 1;
3486 data
->arg
.reclaim
= 1;
3487 task_setup_data
.callback_data
= data
;
3488 task
= rpc_run_task(&task_setup_data
);
3490 return PTR_ERR(task
);
3491 ret
= nfs4_wait_for_completion_rpc_task(task
);
3493 ret
= data
->rpc_status
;
3494 if (ret
== -NFS4ERR_DENIED
)
3497 data
->cancelled
= 1;
3499 dprintk("%s: done, ret = %d!\n", __FUNCTION__
, ret
);
3503 static int nfs4_lock_reclaim(struct nfs4_state
*state
, struct file_lock
*request
)
3505 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3506 struct nfs4_exception exception
= { };
3510 /* Cache the lock if possible... */
3511 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
3513 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 1);
3514 if (err
!= -NFS4ERR_DELAY
)
3516 nfs4_handle_exception(server
, err
, &exception
);
3517 } while (exception
.retry
);
3521 static int nfs4_lock_expired(struct nfs4_state
*state
, struct file_lock
*request
)
3523 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3524 struct nfs4_exception exception
= { };
3527 err
= nfs4_set_lock_state(state
, request
);
3531 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
3533 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 0);
3534 if (err
!= -NFS4ERR_DELAY
)
3536 nfs4_handle_exception(server
, err
, &exception
);
3537 } while (exception
.retry
);
3541 static int _nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3543 struct nfs_client
*clp
= state
->owner
->so_client
;
3544 unsigned char fl_flags
= request
->fl_flags
;
3547 /* Is this a delegated open? */
3548 status
= nfs4_set_lock_state(state
, request
);
3551 request
->fl_flags
|= FL_ACCESS
;
3552 status
= do_vfs_lock(request
->fl_file
, request
);
3555 down_read(&clp
->cl_sem
);
3556 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
)) {
3557 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
3558 /* Yes: cache locks! */
3559 down_read(&nfsi
->rwsem
);
3560 /* ...but avoid races with delegation recall... */
3561 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
)) {
3562 request
->fl_flags
= fl_flags
& ~FL_SLEEP
;
3563 status
= do_vfs_lock(request
->fl_file
, request
);
3564 up_read(&nfsi
->rwsem
);
3567 up_read(&nfsi
->rwsem
);
3569 status
= _nfs4_do_setlk(state
, cmd
, request
, 0);
3572 /* Note: we always want to sleep here! */
3573 request
->fl_flags
= fl_flags
| FL_SLEEP
;
3574 if (do_vfs_lock(request
->fl_file
, request
) < 0)
3575 printk(KERN_WARNING
"%s: VFS is out of sync with lock manager!\n", __FUNCTION__
);
3577 up_read(&clp
->cl_sem
);
3579 request
->fl_flags
= fl_flags
;
3583 static int nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3585 struct nfs4_exception exception
= { };
3589 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3590 _nfs4_proc_setlk(state
, cmd
, request
),
3592 } while (exception
.retry
);
3597 nfs4_proc_lock(struct file
*filp
, int cmd
, struct file_lock
*request
)
3599 struct nfs_open_context
*ctx
;
3600 struct nfs4_state
*state
;
3601 unsigned long timeout
= NFS4_LOCK_MINTIMEOUT
;
3604 /* verify open state */
3605 ctx
= nfs_file_open_context(filp
);
3608 if (request
->fl_start
< 0 || request
->fl_end
< 0)
3612 return nfs4_proc_getlk(state
, F_GETLK
, request
);
3614 if (!(IS_SETLK(cmd
) || IS_SETLKW(cmd
)))
3617 if (request
->fl_type
== F_UNLCK
)
3618 return nfs4_proc_unlck(state
, cmd
, request
);
3621 status
= nfs4_proc_setlk(state
, cmd
, request
);
3622 if ((status
!= -EAGAIN
) || IS_SETLK(cmd
))
3624 timeout
= nfs4_set_lock_task_retry(timeout
);
3625 status
= -ERESTARTSYS
;
3628 } while(status
< 0);
3632 int nfs4_lock_delegation_recall(struct nfs4_state
*state
, struct file_lock
*fl
)
3634 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3635 struct nfs4_exception exception
= { };
3638 err
= nfs4_set_lock_state(state
, fl
);
3642 err
= _nfs4_do_setlk(state
, F_SETLK
, fl
, 0);
3643 if (err
!= -NFS4ERR_DELAY
)
3645 err
= nfs4_handle_exception(server
, err
, &exception
);
3646 } while (exception
.retry
);
3651 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3653 int nfs4_setxattr(struct dentry
*dentry
, const char *key
, const void *buf
,
3654 size_t buflen
, int flags
)
3656 struct inode
*inode
= dentry
->d_inode
;
3658 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
3661 if (!S_ISREG(inode
->i_mode
) &&
3662 (!S_ISDIR(inode
->i_mode
) || inode
->i_mode
& S_ISVTX
))
3665 return nfs4_proc_set_acl(inode
, buf
, buflen
);
3668 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3669 * and that's what we'll do for e.g. user attributes that haven't been set.
3670 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3671 * attributes in kernel-managed attribute namespaces. */
3672 ssize_t
nfs4_getxattr(struct dentry
*dentry
, const char *key
, void *buf
,
3675 struct inode
*inode
= dentry
->d_inode
;
3677 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
3680 return nfs4_proc_get_acl(inode
, buf
, buflen
);
3683 ssize_t
nfs4_listxattr(struct dentry
*dentry
, char *buf
, size_t buflen
)
3685 size_t len
= strlen(XATTR_NAME_NFSV4_ACL
) + 1;
3687 if (!nfs4_server_supports_acls(NFS_SERVER(dentry
->d_inode
)))
3689 if (buf
&& buflen
< len
)
3692 memcpy(buf
, XATTR_NAME_NFSV4_ACL
, len
);
3696 int nfs4_proc_fs_locations(struct inode
*dir
, const struct qstr
*name
,
3697 struct nfs4_fs_locations
*fs_locations
, struct page
*page
)
3699 struct nfs_server
*server
= NFS_SERVER(dir
);
3701 [0] = FATTR4_WORD0_FSID
| FATTR4_WORD0_FS_LOCATIONS
,
3702 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID
,
3704 struct nfs4_fs_locations_arg args
= {
3705 .dir_fh
= NFS_FH(dir
),
3710 struct rpc_message msg
= {
3711 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FS_LOCATIONS
],
3713 .rpc_resp
= fs_locations
,
3717 dprintk("%s: start\n", __FUNCTION__
);
3718 nfs_fattr_init(&fs_locations
->fattr
);
3719 fs_locations
->server
= server
;
3720 fs_locations
->nlocations
= 0;
3721 status
= rpc_call_sync(server
->client
, &msg
, 0);
3722 dprintk("%s: returned status = %d\n", __FUNCTION__
, status
);
3726 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops
= {
3727 .recover_open
= nfs4_open_reclaim
,
3728 .recover_lock
= nfs4_lock_reclaim
,
3731 struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops
= {
3732 .recover_open
= nfs4_open_expired
,
3733 .recover_lock
= nfs4_lock_expired
,
3736 static const struct inode_operations nfs4_file_inode_operations
= {
3737 .permission
= nfs_permission
,
3738 .getattr
= nfs_getattr
,
3739 .setattr
= nfs_setattr
,
3740 .getxattr
= nfs4_getxattr
,
3741 .setxattr
= nfs4_setxattr
,
3742 .listxattr
= nfs4_listxattr
,
3745 const struct nfs_rpc_ops nfs_v4_clientops
= {
3746 .version
= 4, /* protocol version */
3747 .dentry_ops
= &nfs4_dentry_operations
,
3748 .dir_inode_ops
= &nfs4_dir_inode_operations
,
3749 .file_inode_ops
= &nfs4_file_inode_operations
,
3750 .getroot
= nfs4_proc_get_root
,
3751 .getattr
= nfs4_proc_getattr
,
3752 .setattr
= nfs4_proc_setattr
,
3753 .lookupfh
= nfs4_proc_lookupfh
,
3754 .lookup
= nfs4_proc_lookup
,
3755 .access
= nfs4_proc_access
,
3756 .readlink
= nfs4_proc_readlink
,
3757 .create
= nfs4_proc_create
,
3758 .remove
= nfs4_proc_remove
,
3759 .unlink_setup
= nfs4_proc_unlink_setup
,
3760 .unlink_done
= nfs4_proc_unlink_done
,
3761 .rename
= nfs4_proc_rename
,
3762 .link
= nfs4_proc_link
,
3763 .symlink
= nfs4_proc_symlink
,
3764 .mkdir
= nfs4_proc_mkdir
,
3765 .rmdir
= nfs4_proc_remove
,
3766 .readdir
= nfs4_proc_readdir
,
3767 .mknod
= nfs4_proc_mknod
,
3768 .statfs
= nfs4_proc_statfs
,
3769 .fsinfo
= nfs4_proc_fsinfo
,
3770 .pathconf
= nfs4_proc_pathconf
,
3771 .set_capabilities
= nfs4_server_capabilities
,
3772 .decode_dirent
= nfs4_decode_dirent
,
3773 .read_setup
= nfs4_proc_read_setup
,
3774 .read_done
= nfs4_read_done
,
3775 .write_setup
= nfs4_proc_write_setup
,
3776 .write_done
= nfs4_write_done
,
3777 .commit_setup
= nfs4_proc_commit_setup
,
3778 .commit_done
= nfs4_commit_done
,
3779 .file_open
= nfs_open
,
3780 .file_release
= nfs_release
,
3781 .lock
= nfs4_proc_lock
,
3782 .clear_acl_cache
= nfs4_zap_acl_attr
,