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
;
784 kref_get(&data
->kref
);
786 data
->rpc_status
= 0;
787 task
= rpc_run_task(server
->client
, RPC_TASK_ASYNC
, &nfs4_open_confirm_ops
, data
);
789 return PTR_ERR(task
);
790 status
= nfs4_wait_for_completion_rpc_task(task
);
795 status
= data
->rpc_status
;
800 static void nfs4_open_prepare(struct rpc_task
*task
, void *calldata
)
802 struct nfs4_opendata
*data
= calldata
;
803 struct nfs4_state_owner
*sp
= data
->owner
;
804 struct rpc_message msg
= {
805 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN
],
806 .rpc_argp
= &data
->o_arg
,
807 .rpc_resp
= &data
->o_res
,
808 .rpc_cred
= sp
->so_cred
,
811 if (nfs_wait_on_sequence(data
->o_arg
.seqid
, task
) != 0)
814 * Check if we still need to send an OPEN call, or if we can use
815 * a delegation instead.
817 if (data
->state
!= NULL
) {
818 struct nfs_delegation
*delegation
;
820 if (can_open_cached(data
->state
, data
->o_arg
.open_flags
& (FMODE_READ
|FMODE_WRITE
|O_EXCL
)))
823 delegation
= rcu_dereference(NFS_I(data
->state
->inode
)->delegation
);
824 if (delegation
!= NULL
&&
825 (delegation
->flags
& NFS_DELEGATION_NEED_RECLAIM
) == 0) {
831 /* Update sequence id. */
832 data
->o_arg
.id
= sp
->so_owner_id
.id
;
833 data
->o_arg
.clientid
= sp
->so_client
->cl_clientid
;
834 if (data
->o_arg
.claim
== NFS4_OPEN_CLAIM_PREVIOUS
) {
835 msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_NOATTR
];
836 nfs_copy_fh(&data
->o_res
.fh
, data
->o_arg
.fh
);
838 data
->timestamp
= jiffies
;
839 rpc_call_setup(task
, &msg
, 0);
842 task
->tk_action
= NULL
;
846 static void nfs4_open_done(struct rpc_task
*task
, void *calldata
)
848 struct nfs4_opendata
*data
= calldata
;
850 data
->rpc_status
= task
->tk_status
;
851 if (RPC_ASSASSINATED(task
))
853 if (task
->tk_status
== 0) {
854 switch (data
->o_res
.f_attr
->mode
& S_IFMT
) {
858 data
->rpc_status
= -ELOOP
;
861 data
->rpc_status
= -EISDIR
;
864 data
->rpc_status
= -ENOTDIR
;
866 renew_lease(data
->o_res
.server
, data
->timestamp
);
867 if (!(data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
))
868 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
870 nfs_increment_open_seqid(data
->rpc_status
, data
->o_arg
.seqid
);
874 static void nfs4_open_release(void *calldata
)
876 struct nfs4_opendata
*data
= calldata
;
877 struct nfs4_state
*state
= NULL
;
879 /* If this request hasn't been cancelled, do nothing */
880 if (data
->cancelled
== 0)
882 /* In case of error, no cleanup! */
883 if (data
->rpc_status
!= 0 || !data
->rpc_done
)
885 /* In case we need an open_confirm, no cleanup! */
886 if (data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
)
888 state
= nfs4_opendata_to_nfs4_state(data
);
890 nfs4_close_state(&data
->path
, state
, data
->o_arg
.open_flags
);
892 nfs4_opendata_put(data
);
895 static const struct rpc_call_ops nfs4_open_ops
= {
896 .rpc_call_prepare
= nfs4_open_prepare
,
897 .rpc_call_done
= nfs4_open_done
,
898 .rpc_release
= nfs4_open_release
,
902 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
904 static int _nfs4_proc_open(struct nfs4_opendata
*data
)
906 struct inode
*dir
= data
->dir
->d_inode
;
907 struct nfs_server
*server
= NFS_SERVER(dir
);
908 struct nfs_openargs
*o_arg
= &data
->o_arg
;
909 struct nfs_openres
*o_res
= &data
->o_res
;
910 struct rpc_task
*task
;
913 kref_get(&data
->kref
);
915 data
->rpc_status
= 0;
917 task
= rpc_run_task(server
->client
, RPC_TASK_ASYNC
, &nfs4_open_ops
, data
);
919 return PTR_ERR(task
);
920 status
= nfs4_wait_for_completion_rpc_task(task
);
925 status
= data
->rpc_status
;
927 if (status
!= 0 || !data
->rpc_done
)
930 if (o_res
->fh
.size
== 0)
931 _nfs4_proc_lookup(dir
, o_arg
->name
, &o_res
->fh
, o_res
->f_attr
);
933 if (o_arg
->open_flags
& O_CREAT
) {
934 update_changeattr(dir
, &o_res
->cinfo
);
935 nfs_post_op_update_inode(dir
, o_res
->dir_attr
);
937 nfs_refresh_inode(dir
, o_res
->dir_attr
);
938 if(o_res
->rflags
& NFS4_OPEN_RESULT_CONFIRM
) {
939 status
= _nfs4_proc_open_confirm(data
);
943 if (!(o_res
->f_attr
->valid
& NFS_ATTR_FATTR
))
944 _nfs4_proc_getattr(server
, &o_res
->fh
, o_res
->f_attr
);
948 static int nfs4_recover_expired_lease(struct nfs_server
*server
)
950 struct nfs_client
*clp
= server
->nfs_client
;
954 ret
= nfs4_wait_clnt_recover(server
->client
, clp
);
957 if (!test_and_clear_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
))
959 nfs4_schedule_state_recovery(clp
);
966 * reclaim state on the server after a network partition.
967 * Assumes caller holds the appropriate lock
969 static int _nfs4_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
971 struct nfs4_opendata
*opendata
;
974 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
975 if (IS_ERR(opendata
))
976 return PTR_ERR(opendata
);
977 ret
= nfs4_open_recover(opendata
, state
);
978 if (ret
== -ESTALE
) {
979 /* Invalidate the state owner so we don't ever use it again */
980 nfs4_drop_state_owner(state
->owner
);
981 d_drop(ctx
->path
.dentry
);
983 nfs4_opendata_put(opendata
);
987 static inline int nfs4_do_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
989 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
990 struct nfs4_exception exception
= { };
994 err
= _nfs4_open_expired(ctx
, state
);
995 if (err
== -NFS4ERR_DELAY
)
996 nfs4_handle_exception(server
, err
, &exception
);
997 } while (exception
.retry
);
1001 static int nfs4_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
1003 struct nfs_open_context
*ctx
;
1006 ctx
= nfs4_state_find_open_context(state
);
1008 return PTR_ERR(ctx
);
1009 ret
= nfs4_do_open_expired(ctx
, state
);
1010 put_nfs_open_context(ctx
);
1015 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1016 * fields corresponding to attributes that were used to store the verifier.
1017 * Make sure we clobber those fields in the later setattr call
1019 static inline void nfs4_exclusive_attrset(struct nfs4_opendata
*opendata
, struct iattr
*sattr
)
1021 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_ACCESS
) &&
1022 !(sattr
->ia_valid
& ATTR_ATIME_SET
))
1023 sattr
->ia_valid
|= ATTR_ATIME
;
1025 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_MODIFY
) &&
1026 !(sattr
->ia_valid
& ATTR_MTIME_SET
))
1027 sattr
->ia_valid
|= ATTR_MTIME
;
1031 * Returns a referenced nfs4_state
1033 static int _nfs4_do_open(struct inode
*dir
, struct path
*path
, int flags
, struct iattr
*sattr
, struct rpc_cred
*cred
, struct nfs4_state
**res
)
1035 struct nfs4_state_owner
*sp
;
1036 struct nfs4_state
*state
= NULL
;
1037 struct nfs_server
*server
= NFS_SERVER(dir
);
1038 struct nfs_client
*clp
= server
->nfs_client
;
1039 struct nfs4_opendata
*opendata
;
1042 /* Protect against reboot recovery conflicts */
1044 if (!(sp
= nfs4_get_state_owner(server
, cred
))) {
1045 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1048 status
= nfs4_recover_expired_lease(server
);
1050 goto err_put_state_owner
;
1051 if (path
->dentry
->d_inode
!= NULL
)
1052 nfs4_return_incompatible_delegation(path
->dentry
->d_inode
, flags
& (FMODE_READ
|FMODE_WRITE
));
1053 down_read(&clp
->cl_sem
);
1055 opendata
= nfs4_opendata_alloc(path
, sp
, flags
, sattr
);
1056 if (opendata
== NULL
)
1057 goto err_release_rwsem
;
1059 if (path
->dentry
->d_inode
!= NULL
)
1060 opendata
->state
= nfs4_get_open_state(path
->dentry
->d_inode
, sp
);
1062 status
= _nfs4_proc_open(opendata
);
1064 goto err_opendata_put
;
1066 if (opendata
->o_arg
.open_flags
& O_EXCL
)
1067 nfs4_exclusive_attrset(opendata
, sattr
);
1069 state
= nfs4_opendata_to_nfs4_state(opendata
);
1070 status
= PTR_ERR(state
);
1072 goto err_opendata_put
;
1073 nfs4_opendata_put(opendata
);
1074 nfs4_put_state_owner(sp
);
1075 up_read(&clp
->cl_sem
);
1079 nfs4_opendata_put(opendata
);
1081 up_read(&clp
->cl_sem
);
1082 err_put_state_owner
:
1083 nfs4_put_state_owner(sp
);
1090 static struct nfs4_state
*nfs4_do_open(struct inode
*dir
, struct path
*path
, int flags
, struct iattr
*sattr
, struct rpc_cred
*cred
)
1092 struct nfs4_exception exception
= { };
1093 struct nfs4_state
*res
;
1097 status
= _nfs4_do_open(dir
, path
, flags
, sattr
, cred
, &res
);
1100 /* NOTE: BAD_SEQID means the server and client disagree about the
1101 * book-keeping w.r.t. state-changing operations
1102 * (OPEN/CLOSE/LOCK/LOCKU...)
1103 * It is actually a sign of a bug on the client or on the server.
1105 * If we receive a BAD_SEQID error in the particular case of
1106 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1107 * have unhashed the old state_owner for us, and that we can
1108 * therefore safely retry using a new one. We should still warn
1109 * the user though...
1111 if (status
== -NFS4ERR_BAD_SEQID
) {
1112 printk(KERN_WARNING
"NFS: v4 server %s "
1113 " returned a bad sequence-id error!\n",
1114 NFS_SERVER(dir
)->nfs_client
->cl_hostname
);
1115 exception
.retry
= 1;
1119 * BAD_STATEID on OPEN means that the server cancelled our
1120 * state before it received the OPEN_CONFIRM.
1121 * Recover by retrying the request as per the discussion
1122 * on Page 181 of RFC3530.
1124 if (status
== -NFS4ERR_BAD_STATEID
) {
1125 exception
.retry
= 1;
1128 if (status
== -EAGAIN
) {
1129 /* We must have found a delegation */
1130 exception
.retry
= 1;
1133 res
= ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir
),
1134 status
, &exception
));
1135 } while (exception
.retry
);
1139 static int _nfs4_do_setattr(struct inode
*inode
, struct nfs_fattr
*fattr
,
1140 struct iattr
*sattr
, struct nfs4_state
*state
)
1142 struct nfs_server
*server
= NFS_SERVER(inode
);
1143 struct nfs_setattrargs arg
= {
1144 .fh
= NFS_FH(inode
),
1147 .bitmask
= server
->attr_bitmask
,
1149 struct nfs_setattrres res
= {
1153 struct rpc_message msg
= {
1154 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETATTR
],
1158 unsigned long timestamp
= jiffies
;
1161 nfs_fattr_init(fattr
);
1163 if (nfs4_copy_delegation_stateid(&arg
.stateid
, inode
)) {
1164 /* Use that stateid */
1165 } else if (state
!= NULL
) {
1166 msg
.rpc_cred
= state
->owner
->so_cred
;
1167 nfs4_copy_stateid(&arg
.stateid
, state
, current
->files
);
1169 memcpy(&arg
.stateid
, &zero_stateid
, sizeof(arg
.stateid
));
1171 status
= rpc_call_sync(server
->client
, &msg
, 0);
1172 if (status
== 0 && state
!= NULL
)
1173 renew_lease(server
, timestamp
);
1177 static int nfs4_do_setattr(struct inode
*inode
, struct nfs_fattr
*fattr
,
1178 struct iattr
*sattr
, struct nfs4_state
*state
)
1180 struct nfs_server
*server
= NFS_SERVER(inode
);
1181 struct nfs4_exception exception
= { };
1184 err
= nfs4_handle_exception(server
,
1185 _nfs4_do_setattr(inode
, fattr
, sattr
, state
),
1187 } while (exception
.retry
);
1191 struct nfs4_closedata
{
1193 struct inode
*inode
;
1194 struct nfs4_state
*state
;
1195 struct nfs_closeargs arg
;
1196 struct nfs_closeres res
;
1197 struct nfs_fattr fattr
;
1198 unsigned long timestamp
;
1201 static void nfs4_free_closedata(void *data
)
1203 struct nfs4_closedata
*calldata
= data
;
1204 struct nfs4_state_owner
*sp
= calldata
->state
->owner
;
1206 nfs4_put_open_state(calldata
->state
);
1207 nfs_free_seqid(calldata
->arg
.seqid
);
1208 nfs4_put_state_owner(sp
);
1209 dput(calldata
->path
.dentry
);
1210 mntput(calldata
->path
.mnt
);
1214 static void nfs4_close_done(struct rpc_task
*task
, void *data
)
1216 struct nfs4_closedata
*calldata
= data
;
1217 struct nfs4_state
*state
= calldata
->state
;
1218 struct nfs_server
*server
= NFS_SERVER(calldata
->inode
);
1220 if (RPC_ASSASSINATED(task
))
1222 /* hmm. we are done with the inode, and in the process of freeing
1223 * the state_owner. we keep this around to process errors
1225 nfs_increment_open_seqid(task
->tk_status
, calldata
->arg
.seqid
);
1226 switch (task
->tk_status
) {
1228 nfs_set_open_stateid(state
, &calldata
->res
.stateid
, 0);
1229 renew_lease(server
, calldata
->timestamp
);
1231 case -NFS4ERR_STALE_STATEID
:
1232 case -NFS4ERR_EXPIRED
:
1235 if (nfs4_async_handle_error(task
, server
) == -EAGAIN
) {
1236 rpc_restart_call(task
);
1240 nfs_refresh_inode(calldata
->inode
, calldata
->res
.fattr
);
1243 static void nfs4_close_prepare(struct rpc_task
*task
, void *data
)
1245 struct nfs4_closedata
*calldata
= data
;
1246 struct nfs4_state
*state
= calldata
->state
;
1247 struct rpc_message msg
= {
1248 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CLOSE
],
1249 .rpc_argp
= &calldata
->arg
,
1250 .rpc_resp
= &calldata
->res
,
1251 .rpc_cred
= state
->owner
->so_cred
,
1253 int clear_rd
, clear_wr
, clear_rdwr
;
1255 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
1258 clear_rd
= clear_wr
= clear_rdwr
= 0;
1259 spin_lock(&state
->owner
->so_lock
);
1260 /* Calculate the change in open mode */
1261 if (state
->n_rdwr
== 0) {
1262 if (state
->n_rdonly
== 0) {
1263 clear_rd
|= test_and_clear_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
1264 clear_rdwr
|= test_and_clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1266 if (state
->n_wronly
== 0) {
1267 clear_wr
|= test_and_clear_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
1268 clear_rdwr
|= test_and_clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1271 spin_unlock(&state
->owner
->so_lock
);
1272 if (!clear_rd
&& !clear_wr
&& !clear_rdwr
) {
1273 /* Note: exit _without_ calling nfs4_close_done */
1274 task
->tk_action
= NULL
;
1277 nfs_fattr_init(calldata
->res
.fattr
);
1278 if (test_bit(NFS_O_RDONLY_STATE
, &state
->flags
) != 0) {
1279 msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_DOWNGRADE
];
1280 calldata
->arg
.open_flags
= FMODE_READ
;
1281 } else if (test_bit(NFS_O_WRONLY_STATE
, &state
->flags
) != 0) {
1282 msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_DOWNGRADE
];
1283 calldata
->arg
.open_flags
= FMODE_WRITE
;
1285 calldata
->timestamp
= jiffies
;
1286 rpc_call_setup(task
, &msg
, 0);
1289 static const struct rpc_call_ops nfs4_close_ops
= {
1290 .rpc_call_prepare
= nfs4_close_prepare
,
1291 .rpc_call_done
= nfs4_close_done
,
1292 .rpc_release
= nfs4_free_closedata
,
1296 * It is possible for data to be read/written from a mem-mapped file
1297 * after the sys_close call (which hits the vfs layer as a flush).
1298 * This means that we can't safely call nfsv4 close on a file until
1299 * the inode is cleared. This in turn means that we are not good
1300 * NFSv4 citizens - we do not indicate to the server to update the file's
1301 * share state even when we are done with one of the three share
1302 * stateid's in the inode.
1304 * NOTE: Caller must be holding the sp->so_owner semaphore!
1306 int nfs4_do_close(struct path
*path
, struct nfs4_state
*state
, int wait
)
1308 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1309 struct nfs4_closedata
*calldata
;
1310 struct nfs4_state_owner
*sp
= state
->owner
;
1311 struct rpc_task
*task
;
1312 int status
= -ENOMEM
;
1314 calldata
= kmalloc(sizeof(*calldata
), GFP_KERNEL
);
1315 if (calldata
== NULL
)
1317 calldata
->inode
= state
->inode
;
1318 calldata
->state
= state
;
1319 calldata
->arg
.fh
= NFS_FH(state
->inode
);
1320 calldata
->arg
.stateid
= &state
->open_stateid
;
1321 /* Serialization for the sequence id */
1322 calldata
->arg
.seqid
= nfs_alloc_seqid(&state
->owner
->so_seqid
);
1323 if (calldata
->arg
.seqid
== NULL
)
1324 goto out_free_calldata
;
1325 calldata
->arg
.bitmask
= server
->attr_bitmask
;
1326 calldata
->res
.fattr
= &calldata
->fattr
;
1327 calldata
->res
.server
= server
;
1328 calldata
->path
.mnt
= mntget(path
->mnt
);
1329 calldata
->path
.dentry
= dget(path
->dentry
);
1331 task
= rpc_run_task(server
->client
, RPC_TASK_ASYNC
, &nfs4_close_ops
, calldata
);
1333 return PTR_ERR(task
);
1336 status
= rpc_wait_for_completion_task(task
);
1342 nfs4_put_open_state(state
);
1343 nfs4_put_state_owner(sp
);
1347 static int nfs4_intent_set_file(struct nameidata
*nd
, struct path
*path
, struct nfs4_state
*state
)
1352 /* If the open_intent is for execute, we have an extra check to make */
1353 if (nd
->intent
.open
.flags
& FMODE_EXEC
) {
1354 ret
= nfs_may_open(state
->inode
,
1355 state
->owner
->so_cred
,
1356 nd
->intent
.open
.flags
);
1360 filp
= lookup_instantiate_filp(nd
, path
->dentry
, NULL
);
1361 if (!IS_ERR(filp
)) {
1362 struct nfs_open_context
*ctx
;
1363 ctx
= nfs_file_open_context(filp
);
1367 ret
= PTR_ERR(filp
);
1369 nfs4_close_sync(path
, state
, nd
->intent
.open
.flags
);
1374 nfs4_atomic_open(struct inode
*dir
, struct dentry
*dentry
, struct nameidata
*nd
)
1376 struct dentry
*parent
;
1377 struct path path
= {
1382 struct rpc_cred
*cred
;
1383 struct nfs4_state
*state
;
1386 if (nd
->flags
& LOOKUP_CREATE
) {
1387 attr
.ia_mode
= nd
->intent
.open
.create_mode
;
1388 attr
.ia_valid
= ATTR_MODE
;
1389 if (!IS_POSIXACL(dir
))
1390 attr
.ia_mode
&= ~current
->fs
->umask
;
1393 BUG_ON(nd
->intent
.open
.flags
& O_CREAT
);
1396 cred
= rpcauth_lookupcred(NFS_CLIENT(dir
)->cl_auth
, 0);
1398 return (struct dentry
*)cred
;
1399 parent
= dentry
->d_parent
;
1400 /* Protect against concurrent sillydeletes */
1401 nfs_block_sillyrename(parent
);
1402 state
= nfs4_do_open(dir
, &path
, nd
->intent
.open
.flags
, &attr
, cred
);
1404 if (IS_ERR(state
)) {
1405 if (PTR_ERR(state
) == -ENOENT
) {
1406 d_add(dentry
, NULL
);
1407 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
1409 nfs_unblock_sillyrename(parent
);
1410 return (struct dentry
*)state
;
1412 res
= d_add_unique(dentry
, igrab(state
->inode
));
1415 nfs_set_verifier(path
.dentry
, nfs_save_change_attribute(dir
));
1416 nfs_unblock_sillyrename(parent
);
1417 nfs4_intent_set_file(nd
, &path
, state
);
1422 nfs4_open_revalidate(struct inode
*dir
, struct dentry
*dentry
, int openflags
, struct nameidata
*nd
)
1424 struct path path
= {
1428 struct rpc_cred
*cred
;
1429 struct nfs4_state
*state
;
1431 cred
= rpcauth_lookupcred(NFS_CLIENT(dir
)->cl_auth
, 0);
1433 return PTR_ERR(cred
);
1434 state
= nfs4_do_open(dir
, &path
, openflags
, NULL
, cred
);
1436 if (IS_ERR(state
)) {
1437 switch (PTR_ERR(state
)) {
1443 lookup_instantiate_filp(nd
, (struct dentry
*)state
, NULL
);
1449 if (state
->inode
== dentry
->d_inode
) {
1450 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
1451 nfs4_intent_set_file(nd
, &path
, state
);
1454 nfs4_close_sync(&path
, state
, openflags
);
1461 static int _nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1463 struct nfs4_server_caps_res res
= {};
1464 struct rpc_message msg
= {
1465 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SERVER_CAPS
],
1466 .rpc_argp
= fhandle
,
1471 status
= rpc_call_sync(server
->client
, &msg
, 0);
1473 memcpy(server
->attr_bitmask
, res
.attr_bitmask
, sizeof(server
->attr_bitmask
));
1474 if (res
.attr_bitmask
[0] & FATTR4_WORD0_ACL
)
1475 server
->caps
|= NFS_CAP_ACLS
;
1476 if (res
.has_links
!= 0)
1477 server
->caps
|= NFS_CAP_HARDLINKS
;
1478 if (res
.has_symlinks
!= 0)
1479 server
->caps
|= NFS_CAP_SYMLINKS
;
1480 server
->acl_bitmask
= res
.acl_bitmask
;
1485 int nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1487 struct nfs4_exception exception
= { };
1490 err
= nfs4_handle_exception(server
,
1491 _nfs4_server_capabilities(server
, fhandle
),
1493 } while (exception
.retry
);
1497 static int _nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1498 struct nfs_fsinfo
*info
)
1500 struct nfs4_lookup_root_arg args
= {
1501 .bitmask
= nfs4_fattr_bitmap
,
1503 struct nfs4_lookup_res res
= {
1505 .fattr
= info
->fattr
,
1508 struct rpc_message msg
= {
1509 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP_ROOT
],
1513 nfs_fattr_init(info
->fattr
);
1514 return rpc_call_sync(server
->client
, &msg
, 0);
1517 static int nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1518 struct nfs_fsinfo
*info
)
1520 struct nfs4_exception exception
= { };
1523 err
= nfs4_handle_exception(server
,
1524 _nfs4_lookup_root(server
, fhandle
, info
),
1526 } while (exception
.retry
);
1531 * get the file handle for the "/" directory on the server
1533 static int nfs4_proc_get_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1534 struct nfs_fsinfo
*info
)
1538 status
= nfs4_lookup_root(server
, fhandle
, info
);
1540 status
= nfs4_server_capabilities(server
, fhandle
);
1542 status
= nfs4_do_fsinfo(server
, fhandle
, info
);
1543 return nfs4_map_errors(status
);
1547 * Get locations and (maybe) other attributes of a referral.
1548 * Note that we'll actually follow the referral later when
1549 * we detect fsid mismatch in inode revalidation
1551 static int nfs4_get_referral(struct inode
*dir
, const struct qstr
*name
, struct nfs_fattr
*fattr
, struct nfs_fh
*fhandle
)
1553 int status
= -ENOMEM
;
1554 struct page
*page
= NULL
;
1555 struct nfs4_fs_locations
*locations
= NULL
;
1557 page
= alloc_page(GFP_KERNEL
);
1560 locations
= kmalloc(sizeof(struct nfs4_fs_locations
), GFP_KERNEL
);
1561 if (locations
== NULL
)
1564 status
= nfs4_proc_fs_locations(dir
, name
, locations
, page
);
1567 /* Make sure server returned a different fsid for the referral */
1568 if (nfs_fsid_equal(&NFS_SERVER(dir
)->fsid
, &locations
->fattr
.fsid
)) {
1569 dprintk("%s: server did not return a different fsid for a referral at %s\n", __FUNCTION__
, name
->name
);
1574 memcpy(fattr
, &locations
->fattr
, sizeof(struct nfs_fattr
));
1575 fattr
->valid
|= NFS_ATTR_FATTR_V4_REFERRAL
;
1577 fattr
->mode
= S_IFDIR
;
1578 memset(fhandle
, 0, sizeof(struct nfs_fh
));
1587 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1589 struct nfs4_getattr_arg args
= {
1591 .bitmask
= server
->attr_bitmask
,
1593 struct nfs4_getattr_res res
= {
1597 struct rpc_message msg
= {
1598 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETATTR
],
1603 nfs_fattr_init(fattr
);
1604 return rpc_call_sync(server
->client
, &msg
, 0);
1607 static int nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1609 struct nfs4_exception exception
= { };
1612 err
= nfs4_handle_exception(server
,
1613 _nfs4_proc_getattr(server
, fhandle
, fattr
),
1615 } while (exception
.retry
);
1620 * The file is not closed if it is opened due to the a request to change
1621 * the size of the file. The open call will not be needed once the
1622 * VFS layer lookup-intents are implemented.
1624 * Close is called when the inode is destroyed.
1625 * If we haven't opened the file for O_WRONLY, we
1626 * need to in the size_change case to obtain a stateid.
1629 * Because OPEN is always done by name in nfsv4, it is
1630 * possible that we opened a different file by the same
1631 * name. We can recognize this race condition, but we
1632 * can't do anything about it besides returning an error.
1634 * This will be fixed with VFS changes (lookup-intent).
1637 nfs4_proc_setattr(struct dentry
*dentry
, struct nfs_fattr
*fattr
,
1638 struct iattr
*sattr
)
1640 struct rpc_cred
*cred
;
1641 struct inode
*inode
= dentry
->d_inode
;
1642 struct nfs_open_context
*ctx
;
1643 struct nfs4_state
*state
= NULL
;
1646 nfs_fattr_init(fattr
);
1648 cred
= rpcauth_lookupcred(NFS_CLIENT(inode
)->cl_auth
, 0);
1650 return PTR_ERR(cred
);
1652 /* Search for an existing open(O_WRITE) file */
1653 ctx
= nfs_find_open_context(inode
, cred
, FMODE_WRITE
);
1657 status
= nfs4_do_setattr(inode
, fattr
, sattr
, state
);
1659 nfs_setattr_update_inode(inode
, sattr
);
1661 put_nfs_open_context(ctx
);
1666 static int _nfs4_proc_lookupfh(struct nfs_server
*server
, const struct nfs_fh
*dirfh
,
1667 const struct qstr
*name
, struct nfs_fh
*fhandle
,
1668 struct nfs_fattr
*fattr
)
1671 struct nfs4_lookup_arg args
= {
1672 .bitmask
= server
->attr_bitmask
,
1676 struct nfs4_lookup_res res
= {
1681 struct rpc_message msg
= {
1682 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP
],
1687 nfs_fattr_init(fattr
);
1689 dprintk("NFS call lookupfh %s\n", name
->name
);
1690 status
= rpc_call_sync(server
->client
, &msg
, 0);
1691 dprintk("NFS reply lookupfh: %d\n", status
);
1695 static int nfs4_proc_lookupfh(struct nfs_server
*server
, struct nfs_fh
*dirfh
,
1696 struct qstr
*name
, struct nfs_fh
*fhandle
,
1697 struct nfs_fattr
*fattr
)
1699 struct nfs4_exception exception
= { };
1702 err
= _nfs4_proc_lookupfh(server
, dirfh
, name
, fhandle
, fattr
);
1704 if (err
== -NFS4ERR_MOVED
) {
1708 err
= nfs4_handle_exception(server
, err
, &exception
);
1709 } while (exception
.retry
);
1713 static int _nfs4_proc_lookup(struct inode
*dir
, const struct qstr
*name
,
1714 struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1718 dprintk("NFS call lookup %s\n", name
->name
);
1719 status
= _nfs4_proc_lookupfh(NFS_SERVER(dir
), NFS_FH(dir
), name
, fhandle
, fattr
);
1720 if (status
== -NFS4ERR_MOVED
)
1721 status
= nfs4_get_referral(dir
, name
, fattr
, fhandle
);
1722 dprintk("NFS reply lookup: %d\n", status
);
1726 static int nfs4_proc_lookup(struct inode
*dir
, struct qstr
*name
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1728 struct nfs4_exception exception
= { };
1731 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1732 _nfs4_proc_lookup(dir
, name
, fhandle
, fattr
),
1734 } while (exception
.retry
);
1738 static int _nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
1740 struct nfs_server
*server
= NFS_SERVER(inode
);
1741 struct nfs_fattr fattr
;
1742 struct nfs4_accessargs args
= {
1743 .fh
= NFS_FH(inode
),
1744 .bitmask
= server
->attr_bitmask
,
1746 struct nfs4_accessres res
= {
1750 struct rpc_message msg
= {
1751 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_ACCESS
],
1754 .rpc_cred
= entry
->cred
,
1756 int mode
= entry
->mask
;
1760 * Determine which access bits we want to ask for...
1762 if (mode
& MAY_READ
)
1763 args
.access
|= NFS4_ACCESS_READ
;
1764 if (S_ISDIR(inode
->i_mode
)) {
1765 if (mode
& MAY_WRITE
)
1766 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
;
1767 if (mode
& MAY_EXEC
)
1768 args
.access
|= NFS4_ACCESS_LOOKUP
;
1770 if (mode
& MAY_WRITE
)
1771 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
;
1772 if (mode
& MAY_EXEC
)
1773 args
.access
|= NFS4_ACCESS_EXECUTE
;
1775 nfs_fattr_init(&fattr
);
1776 status
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
1779 if (res
.access
& NFS4_ACCESS_READ
)
1780 entry
->mask
|= MAY_READ
;
1781 if (res
.access
& (NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
))
1782 entry
->mask
|= MAY_WRITE
;
1783 if (res
.access
& (NFS4_ACCESS_LOOKUP
|NFS4_ACCESS_EXECUTE
))
1784 entry
->mask
|= MAY_EXEC
;
1785 nfs_refresh_inode(inode
, &fattr
);
1790 static int nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
1792 struct nfs4_exception exception
= { };
1795 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1796 _nfs4_proc_access(inode
, entry
),
1798 } while (exception
.retry
);
1803 * TODO: For the time being, we don't try to get any attributes
1804 * along with any of the zero-copy operations READ, READDIR,
1807 * In the case of the first three, we want to put the GETATTR
1808 * after the read-type operation -- this is because it is hard
1809 * to predict the length of a GETATTR response in v4, and thus
1810 * align the READ data correctly. This means that the GETATTR
1811 * may end up partially falling into the page cache, and we should
1812 * shift it into the 'tail' of the xdr_buf before processing.
1813 * To do this efficiently, we need to know the total length
1814 * of data received, which doesn't seem to be available outside
1817 * In the case of WRITE, we also want to put the GETATTR after
1818 * the operation -- in this case because we want to make sure
1819 * we get the post-operation mtime and size. This means that
1820 * we can't use xdr_encode_pages() as written: we need a variant
1821 * of it which would leave room in the 'tail' iovec.
1823 * Both of these changes to the XDR layer would in fact be quite
1824 * minor, but I decided to leave them for a subsequent patch.
1826 static int _nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
1827 unsigned int pgbase
, unsigned int pglen
)
1829 struct nfs4_readlink args
= {
1830 .fh
= NFS_FH(inode
),
1835 struct rpc_message msg
= {
1836 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READLINK
],
1841 return rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
1844 static int nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
1845 unsigned int pgbase
, unsigned int pglen
)
1847 struct nfs4_exception exception
= { };
1850 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1851 _nfs4_proc_readlink(inode
, page
, pgbase
, pglen
),
1853 } while (exception
.retry
);
1859 * We will need to arrange for the VFS layer to provide an atomic open.
1860 * Until then, this create/open method is prone to inefficiency and race
1861 * conditions due to the lookup, create, and open VFS calls from sys_open()
1862 * placed on the wire.
1864 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1865 * The file will be opened again in the subsequent VFS open call
1866 * (nfs4_proc_file_open).
1868 * The open for read will just hang around to be used by any process that
1869 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1873 nfs4_proc_create(struct inode
*dir
, struct dentry
*dentry
, struct iattr
*sattr
,
1874 int flags
, struct nameidata
*nd
)
1876 struct path path
= {
1880 struct nfs4_state
*state
;
1881 struct rpc_cred
*cred
;
1884 cred
= rpcauth_lookupcred(NFS_CLIENT(dir
)->cl_auth
, 0);
1886 status
= PTR_ERR(cred
);
1889 state
= nfs4_do_open(dir
, &path
, flags
, sattr
, cred
);
1892 if (IS_ERR(state
)) {
1893 status
= PTR_ERR(state
);
1896 d_add(dentry
, igrab(state
->inode
));
1897 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
1898 if (flags
& O_EXCL
) {
1899 struct nfs_fattr fattr
;
1900 status
= nfs4_do_setattr(state
->inode
, &fattr
, sattr
, state
);
1902 nfs_setattr_update_inode(state
->inode
, sattr
);
1903 nfs_post_op_update_inode(state
->inode
, &fattr
);
1905 if (status
== 0 && (nd
->flags
& LOOKUP_OPEN
) != 0)
1906 status
= nfs4_intent_set_file(nd
, &path
, state
);
1908 nfs4_close_sync(&path
, state
, flags
);
1913 static int _nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
1915 struct nfs_server
*server
= NFS_SERVER(dir
);
1916 struct nfs_removeargs args
= {
1918 .name
.len
= name
->len
,
1919 .name
.name
= name
->name
,
1920 .bitmask
= server
->attr_bitmask
,
1922 struct nfs_removeres res
= {
1925 struct rpc_message msg
= {
1926 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
],
1932 nfs_fattr_init(&res
.dir_attr
);
1933 status
= rpc_call_sync(server
->client
, &msg
, 0);
1935 update_changeattr(dir
, &res
.cinfo
);
1936 nfs_post_op_update_inode(dir
, &res
.dir_attr
);
1941 static int nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
1943 struct nfs4_exception exception
= { };
1946 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1947 _nfs4_proc_remove(dir
, name
),
1949 } while (exception
.retry
);
1953 static void nfs4_proc_unlink_setup(struct rpc_message
*msg
, struct inode
*dir
)
1955 struct nfs_server
*server
= NFS_SERVER(dir
);
1956 struct nfs_removeargs
*args
= msg
->rpc_argp
;
1957 struct nfs_removeres
*res
= msg
->rpc_resp
;
1959 args
->bitmask
= server
->attr_bitmask
;
1960 res
->server
= server
;
1961 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
];
1964 static int nfs4_proc_unlink_done(struct rpc_task
*task
, struct inode
*dir
)
1966 struct nfs_removeres
*res
= task
->tk_msg
.rpc_resp
;
1968 if (nfs4_async_handle_error(task
, res
->server
) == -EAGAIN
)
1970 update_changeattr(dir
, &res
->cinfo
);
1971 nfs_post_op_update_inode(dir
, &res
->dir_attr
);
1975 static int _nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
1976 struct inode
*new_dir
, struct qstr
*new_name
)
1978 struct nfs_server
*server
= NFS_SERVER(old_dir
);
1979 struct nfs4_rename_arg arg
= {
1980 .old_dir
= NFS_FH(old_dir
),
1981 .new_dir
= NFS_FH(new_dir
),
1982 .old_name
= old_name
,
1983 .new_name
= new_name
,
1984 .bitmask
= server
->attr_bitmask
,
1986 struct nfs_fattr old_fattr
, new_fattr
;
1987 struct nfs4_rename_res res
= {
1989 .old_fattr
= &old_fattr
,
1990 .new_fattr
= &new_fattr
,
1992 struct rpc_message msg
= {
1993 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENAME
],
1999 nfs_fattr_init(res
.old_fattr
);
2000 nfs_fattr_init(res
.new_fattr
);
2001 status
= rpc_call_sync(server
->client
, &msg
, 0);
2004 update_changeattr(old_dir
, &res
.old_cinfo
);
2005 nfs_post_op_update_inode(old_dir
, res
.old_fattr
);
2006 update_changeattr(new_dir
, &res
.new_cinfo
);
2007 nfs_post_op_update_inode(new_dir
, res
.new_fattr
);
2012 static int nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2013 struct inode
*new_dir
, struct qstr
*new_name
)
2015 struct nfs4_exception exception
= { };
2018 err
= nfs4_handle_exception(NFS_SERVER(old_dir
),
2019 _nfs4_proc_rename(old_dir
, old_name
,
2022 } while (exception
.retry
);
2026 static int _nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2028 struct nfs_server
*server
= NFS_SERVER(inode
);
2029 struct nfs4_link_arg arg
= {
2030 .fh
= NFS_FH(inode
),
2031 .dir_fh
= NFS_FH(dir
),
2033 .bitmask
= server
->attr_bitmask
,
2035 struct nfs_fattr fattr
, dir_attr
;
2036 struct nfs4_link_res res
= {
2039 .dir_attr
= &dir_attr
,
2041 struct rpc_message msg
= {
2042 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LINK
],
2048 nfs_fattr_init(res
.fattr
);
2049 nfs_fattr_init(res
.dir_attr
);
2050 status
= rpc_call_sync(server
->client
, &msg
, 0);
2052 update_changeattr(dir
, &res
.cinfo
);
2053 nfs_post_op_update_inode(dir
, res
.dir_attr
);
2054 nfs_post_op_update_inode(inode
, res
.fattr
);
2060 static int nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2062 struct nfs4_exception exception
= { };
2065 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2066 _nfs4_proc_link(inode
, dir
, name
),
2068 } while (exception
.retry
);
2072 static int _nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2073 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2075 struct nfs_server
*server
= NFS_SERVER(dir
);
2076 struct nfs_fh fhandle
;
2077 struct nfs_fattr fattr
, dir_fattr
;
2078 struct nfs4_create_arg arg
= {
2079 .dir_fh
= NFS_FH(dir
),
2081 .name
= &dentry
->d_name
,
2084 .bitmask
= server
->attr_bitmask
,
2086 struct nfs4_create_res res
= {
2090 .dir_fattr
= &dir_fattr
,
2092 struct rpc_message msg
= {
2093 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SYMLINK
],
2099 if (len
> NFS4_MAXPATHLEN
)
2100 return -ENAMETOOLONG
;
2102 arg
.u
.symlink
.pages
= &page
;
2103 arg
.u
.symlink
.len
= len
;
2104 nfs_fattr_init(&fattr
);
2105 nfs_fattr_init(&dir_fattr
);
2107 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
2109 update_changeattr(dir
, &res
.dir_cinfo
);
2110 nfs_post_op_update_inode(dir
, res
.dir_fattr
);
2111 status
= nfs_instantiate(dentry
, &fhandle
, &fattr
);
2116 static int nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2117 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2119 struct nfs4_exception exception
= { };
2122 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2123 _nfs4_proc_symlink(dir
, dentry
, page
,
2126 } while (exception
.retry
);
2130 static int _nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2131 struct iattr
*sattr
)
2133 struct nfs_server
*server
= NFS_SERVER(dir
);
2134 struct nfs_fh fhandle
;
2135 struct nfs_fattr fattr
, dir_fattr
;
2136 struct nfs4_create_arg arg
= {
2137 .dir_fh
= NFS_FH(dir
),
2139 .name
= &dentry
->d_name
,
2142 .bitmask
= server
->attr_bitmask
,
2144 struct nfs4_create_res res
= {
2148 .dir_fattr
= &dir_fattr
,
2150 struct rpc_message msg
= {
2151 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
],
2157 nfs_fattr_init(&fattr
);
2158 nfs_fattr_init(&dir_fattr
);
2160 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
2162 update_changeattr(dir
, &res
.dir_cinfo
);
2163 nfs_post_op_update_inode(dir
, res
.dir_fattr
);
2164 status
= nfs_instantiate(dentry
, &fhandle
, &fattr
);
2169 static int nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2170 struct iattr
*sattr
)
2172 struct nfs4_exception exception
= { };
2175 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2176 _nfs4_proc_mkdir(dir
, dentry
, sattr
),
2178 } while (exception
.retry
);
2182 static int _nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2183 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2185 struct inode
*dir
= dentry
->d_inode
;
2186 struct nfs4_readdir_arg args
= {
2191 .bitmask
= NFS_SERVER(dentry
->d_inode
)->attr_bitmask
,
2193 struct nfs4_readdir_res res
;
2194 struct rpc_message msg
= {
2195 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READDIR
],
2202 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __FUNCTION__
,
2203 dentry
->d_parent
->d_name
.name
,
2204 dentry
->d_name
.name
,
2205 (unsigned long long)cookie
);
2206 nfs4_setup_readdir(cookie
, NFS_COOKIEVERF(dir
), dentry
, &args
);
2207 res
.pgbase
= args
.pgbase
;
2208 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
2210 memcpy(NFS_COOKIEVERF(dir
), res
.verifier
.data
, NFS4_VERIFIER_SIZE
);
2212 nfs_invalidate_atime(dir
);
2214 dprintk("%s: returns %d\n", __FUNCTION__
, status
);
2218 static int nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2219 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2221 struct nfs4_exception exception
= { };
2224 err
= nfs4_handle_exception(NFS_SERVER(dentry
->d_inode
),
2225 _nfs4_proc_readdir(dentry
, cred
, cookie
,
2228 } while (exception
.retry
);
2232 static int _nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2233 struct iattr
*sattr
, dev_t rdev
)
2235 struct nfs_server
*server
= NFS_SERVER(dir
);
2237 struct nfs_fattr fattr
, dir_fattr
;
2238 struct nfs4_create_arg arg
= {
2239 .dir_fh
= NFS_FH(dir
),
2241 .name
= &dentry
->d_name
,
2243 .bitmask
= server
->attr_bitmask
,
2245 struct nfs4_create_res res
= {
2249 .dir_fattr
= &dir_fattr
,
2251 struct rpc_message msg
= {
2252 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
],
2257 int mode
= sattr
->ia_mode
;
2259 nfs_fattr_init(&fattr
);
2260 nfs_fattr_init(&dir_fattr
);
2262 BUG_ON(!(sattr
->ia_valid
& ATTR_MODE
));
2263 BUG_ON(!S_ISFIFO(mode
) && !S_ISBLK(mode
) && !S_ISCHR(mode
) && !S_ISSOCK(mode
));
2265 arg
.ftype
= NF4FIFO
;
2266 else if (S_ISBLK(mode
)) {
2268 arg
.u
.device
.specdata1
= MAJOR(rdev
);
2269 arg
.u
.device
.specdata2
= MINOR(rdev
);
2271 else if (S_ISCHR(mode
)) {
2273 arg
.u
.device
.specdata1
= MAJOR(rdev
);
2274 arg
.u
.device
.specdata2
= MINOR(rdev
);
2277 arg
.ftype
= NF4SOCK
;
2279 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
2281 update_changeattr(dir
, &res
.dir_cinfo
);
2282 nfs_post_op_update_inode(dir
, res
.dir_fattr
);
2283 status
= nfs_instantiate(dentry
, &fh
, &fattr
);
2288 static int nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2289 struct iattr
*sattr
, dev_t rdev
)
2291 struct nfs4_exception exception
= { };
2294 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2295 _nfs4_proc_mknod(dir
, dentry
, sattr
, rdev
),
2297 } while (exception
.retry
);
2301 static int _nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2302 struct nfs_fsstat
*fsstat
)
2304 struct nfs4_statfs_arg args
= {
2306 .bitmask
= server
->attr_bitmask
,
2308 struct rpc_message msg
= {
2309 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_STATFS
],
2314 nfs_fattr_init(fsstat
->fattr
);
2315 return rpc_call_sync(server
->client
, &msg
, 0);
2318 static int nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsstat
*fsstat
)
2320 struct nfs4_exception exception
= { };
2323 err
= nfs4_handle_exception(server
,
2324 _nfs4_proc_statfs(server
, fhandle
, fsstat
),
2326 } while (exception
.retry
);
2330 static int _nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2331 struct nfs_fsinfo
*fsinfo
)
2333 struct nfs4_fsinfo_arg args
= {
2335 .bitmask
= server
->attr_bitmask
,
2337 struct rpc_message msg
= {
2338 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FSINFO
],
2343 return rpc_call_sync(server
->client
, &msg
, 0);
2346 static int nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2348 struct nfs4_exception exception
= { };
2352 err
= nfs4_handle_exception(server
,
2353 _nfs4_do_fsinfo(server
, fhandle
, fsinfo
),
2355 } while (exception
.retry
);
2359 static int nfs4_proc_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2361 nfs_fattr_init(fsinfo
->fattr
);
2362 return nfs4_do_fsinfo(server
, fhandle
, fsinfo
);
2365 static int _nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2366 struct nfs_pathconf
*pathconf
)
2368 struct nfs4_pathconf_arg args
= {
2370 .bitmask
= server
->attr_bitmask
,
2372 struct rpc_message msg
= {
2373 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_PATHCONF
],
2375 .rpc_resp
= pathconf
,
2378 /* None of the pathconf attributes are mandatory to implement */
2379 if ((args
.bitmask
[0] & nfs4_pathconf_bitmap
[0]) == 0) {
2380 memset(pathconf
, 0, sizeof(*pathconf
));
2384 nfs_fattr_init(pathconf
->fattr
);
2385 return rpc_call_sync(server
->client
, &msg
, 0);
2388 static int nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2389 struct nfs_pathconf
*pathconf
)
2391 struct nfs4_exception exception
= { };
2395 err
= nfs4_handle_exception(server
,
2396 _nfs4_proc_pathconf(server
, fhandle
, pathconf
),
2398 } while (exception
.retry
);
2402 static int nfs4_read_done(struct rpc_task
*task
, struct nfs_read_data
*data
)
2404 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2406 if (nfs4_async_handle_error(task
, server
) == -EAGAIN
) {
2407 rpc_restart_call(task
);
2411 nfs_invalidate_atime(data
->inode
);
2412 if (task
->tk_status
> 0)
2413 renew_lease(server
, data
->timestamp
);
2417 static void nfs4_proc_read_setup(struct nfs_read_data
*data
)
2419 struct rpc_message msg
= {
2420 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READ
],
2421 .rpc_argp
= &data
->args
,
2422 .rpc_resp
= &data
->res
,
2423 .rpc_cred
= data
->cred
,
2426 data
->timestamp
= jiffies
;
2428 rpc_call_setup(&data
->task
, &msg
, 0);
2431 static int nfs4_write_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
2433 struct inode
*inode
= data
->inode
;
2435 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
)) == -EAGAIN
) {
2436 rpc_restart_call(task
);
2439 if (task
->tk_status
>= 0) {
2440 renew_lease(NFS_SERVER(inode
), data
->timestamp
);
2441 nfs_post_op_update_inode_force_wcc(inode
, data
->res
.fattr
);
2446 static void nfs4_proc_write_setup(struct nfs_write_data
*data
, int how
)
2448 struct rpc_message msg
= {
2449 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_WRITE
],
2450 .rpc_argp
= &data
->args
,
2451 .rpc_resp
= &data
->res
,
2452 .rpc_cred
= data
->cred
,
2454 struct inode
*inode
= data
->inode
;
2455 struct nfs_server
*server
= NFS_SERVER(inode
);
2458 if (how
& FLUSH_STABLE
) {
2459 if (!NFS_I(inode
)->ncommit
)
2460 stable
= NFS_FILE_SYNC
;
2462 stable
= NFS_DATA_SYNC
;
2464 stable
= NFS_UNSTABLE
;
2465 data
->args
.stable
= stable
;
2466 data
->args
.bitmask
= server
->attr_bitmask
;
2467 data
->res
.server
= server
;
2469 data
->timestamp
= jiffies
;
2471 /* Finalize the task. */
2472 rpc_call_setup(&data
->task
, &msg
, 0);
2475 static int nfs4_commit_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
2477 struct inode
*inode
= data
->inode
;
2479 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
)) == -EAGAIN
) {
2480 rpc_restart_call(task
);
2483 nfs_refresh_inode(inode
, data
->res
.fattr
);
2487 static void nfs4_proc_commit_setup(struct nfs_write_data
*data
, int how
)
2489 struct rpc_message msg
= {
2490 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_COMMIT
],
2491 .rpc_argp
= &data
->args
,
2492 .rpc_resp
= &data
->res
,
2493 .rpc_cred
= data
->cred
,
2495 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2497 data
->args
.bitmask
= server
->attr_bitmask
;
2498 data
->res
.server
= server
;
2500 rpc_call_setup(&data
->task
, &msg
, 0);
2504 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2505 * standalone procedure for queueing an asynchronous RENEW.
2507 static void nfs4_renew_done(struct rpc_task
*task
, void *data
)
2509 struct nfs_client
*clp
= (struct nfs_client
*)task
->tk_msg
.rpc_argp
;
2510 unsigned long timestamp
= (unsigned long)data
;
2512 if (task
->tk_status
< 0) {
2513 switch (task
->tk_status
) {
2514 case -NFS4ERR_STALE_CLIENTID
:
2515 case -NFS4ERR_EXPIRED
:
2516 case -NFS4ERR_CB_PATH_DOWN
:
2517 nfs4_schedule_state_recovery(clp
);
2521 spin_lock(&clp
->cl_lock
);
2522 if (time_before(clp
->cl_last_renewal
,timestamp
))
2523 clp
->cl_last_renewal
= timestamp
;
2524 spin_unlock(&clp
->cl_lock
);
2527 static const struct rpc_call_ops nfs4_renew_ops
= {
2528 .rpc_call_done
= nfs4_renew_done
,
2531 int nfs4_proc_async_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2533 struct rpc_message msg
= {
2534 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2539 return rpc_call_async(clp
->cl_rpcclient
, &msg
, RPC_TASK_SOFT
,
2540 &nfs4_renew_ops
, (void *)jiffies
);
2543 int nfs4_proc_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2545 struct rpc_message msg
= {
2546 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2550 unsigned long now
= jiffies
;
2553 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2556 spin_lock(&clp
->cl_lock
);
2557 if (time_before(clp
->cl_last_renewal
,now
))
2558 clp
->cl_last_renewal
= now
;
2559 spin_unlock(&clp
->cl_lock
);
2563 static inline int nfs4_server_supports_acls(struct nfs_server
*server
)
2565 return (server
->caps
& NFS_CAP_ACLS
)
2566 && (server
->acl_bitmask
& ACL4_SUPPORT_ALLOW_ACL
)
2567 && (server
->acl_bitmask
& ACL4_SUPPORT_DENY_ACL
);
2570 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2571 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2574 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2576 static void buf_to_pages(const void *buf
, size_t buflen
,
2577 struct page
**pages
, unsigned int *pgbase
)
2579 const void *p
= buf
;
2581 *pgbase
= offset_in_page(buf
);
2583 while (p
< buf
+ buflen
) {
2584 *(pages
++) = virt_to_page(p
);
2585 p
+= PAGE_CACHE_SIZE
;
2589 struct nfs4_cached_acl
{
2595 static void nfs4_set_cached_acl(struct inode
*inode
, struct nfs4_cached_acl
*acl
)
2597 struct nfs_inode
*nfsi
= NFS_I(inode
);
2599 spin_lock(&inode
->i_lock
);
2600 kfree(nfsi
->nfs4_acl
);
2601 nfsi
->nfs4_acl
= acl
;
2602 spin_unlock(&inode
->i_lock
);
2605 static void nfs4_zap_acl_attr(struct inode
*inode
)
2607 nfs4_set_cached_acl(inode
, NULL
);
2610 static inline ssize_t
nfs4_read_cached_acl(struct inode
*inode
, char *buf
, size_t buflen
)
2612 struct nfs_inode
*nfsi
= NFS_I(inode
);
2613 struct nfs4_cached_acl
*acl
;
2616 spin_lock(&inode
->i_lock
);
2617 acl
= nfsi
->nfs4_acl
;
2620 if (buf
== NULL
) /* user is just asking for length */
2622 if (acl
->cached
== 0)
2624 ret
= -ERANGE
; /* see getxattr(2) man page */
2625 if (acl
->len
> buflen
)
2627 memcpy(buf
, acl
->data
, acl
->len
);
2631 spin_unlock(&inode
->i_lock
);
2635 static void nfs4_write_cached_acl(struct inode
*inode
, const char *buf
, size_t acl_len
)
2637 struct nfs4_cached_acl
*acl
;
2639 if (buf
&& acl_len
<= PAGE_SIZE
) {
2640 acl
= kmalloc(sizeof(*acl
) + acl_len
, GFP_KERNEL
);
2644 memcpy(acl
->data
, buf
, acl_len
);
2646 acl
= kmalloc(sizeof(*acl
), GFP_KERNEL
);
2653 nfs4_set_cached_acl(inode
, acl
);
2656 static ssize_t
__nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
2658 struct page
*pages
[NFS4ACL_MAXPAGES
];
2659 struct nfs_getaclargs args
= {
2660 .fh
= NFS_FH(inode
),
2664 size_t resp_len
= buflen
;
2666 struct rpc_message msg
= {
2667 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETACL
],
2669 .rpc_resp
= &resp_len
,
2671 struct page
*localpage
= NULL
;
2674 if (buflen
< PAGE_SIZE
) {
2675 /* As long as we're doing a round trip to the server anyway,
2676 * let's be prepared for a page of acl data. */
2677 localpage
= alloc_page(GFP_KERNEL
);
2678 resp_buf
= page_address(localpage
);
2679 if (localpage
== NULL
)
2681 args
.acl_pages
[0] = localpage
;
2682 args
.acl_pgbase
= 0;
2683 resp_len
= args
.acl_len
= PAGE_SIZE
;
2686 buf_to_pages(buf
, buflen
, args
.acl_pages
, &args
.acl_pgbase
);
2688 ret
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
2691 if (resp_len
> args
.acl_len
)
2692 nfs4_write_cached_acl(inode
, NULL
, resp_len
);
2694 nfs4_write_cached_acl(inode
, resp_buf
, resp_len
);
2697 if (resp_len
> buflen
)
2700 memcpy(buf
, resp_buf
, resp_len
);
2705 __free_page(localpage
);
2709 static ssize_t
nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
2711 struct nfs4_exception exception
= { };
2714 ret
= __nfs4_get_acl_uncached(inode
, buf
, buflen
);
2717 ret
= nfs4_handle_exception(NFS_SERVER(inode
), ret
, &exception
);
2718 } while (exception
.retry
);
2722 static ssize_t
nfs4_proc_get_acl(struct inode
*inode
, void *buf
, size_t buflen
)
2724 struct nfs_server
*server
= NFS_SERVER(inode
);
2727 if (!nfs4_server_supports_acls(server
))
2729 ret
= nfs_revalidate_inode(server
, inode
);
2732 ret
= nfs4_read_cached_acl(inode
, buf
, buflen
);
2735 return nfs4_get_acl_uncached(inode
, buf
, buflen
);
2738 static int __nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
2740 struct nfs_server
*server
= NFS_SERVER(inode
);
2741 struct page
*pages
[NFS4ACL_MAXPAGES
];
2742 struct nfs_setaclargs arg
= {
2743 .fh
= NFS_FH(inode
),
2747 struct rpc_message msg
= {
2748 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETACL
],
2754 if (!nfs4_server_supports_acls(server
))
2756 nfs_inode_return_delegation(inode
);
2757 buf_to_pages(buf
, buflen
, arg
.acl_pages
, &arg
.acl_pgbase
);
2758 ret
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
2759 nfs_zap_caches(inode
);
2763 static int nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
2765 struct nfs4_exception exception
= { };
2768 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2769 __nfs4_proc_set_acl(inode
, buf
, buflen
),
2771 } while (exception
.retry
);
2776 nfs4_async_handle_error(struct rpc_task
*task
, const struct nfs_server
*server
)
2778 struct nfs_client
*clp
= server
->nfs_client
;
2780 if (!clp
|| task
->tk_status
>= 0)
2782 switch(task
->tk_status
) {
2783 case -NFS4ERR_STALE_CLIENTID
:
2784 case -NFS4ERR_STALE_STATEID
:
2785 case -NFS4ERR_EXPIRED
:
2786 rpc_sleep_on(&clp
->cl_rpcwaitq
, task
, NULL
, NULL
);
2787 nfs4_schedule_state_recovery(clp
);
2788 if (test_bit(NFS4CLNT_STATE_RECOVER
, &clp
->cl_state
) == 0)
2789 rpc_wake_up_task(task
);
2790 task
->tk_status
= 0;
2792 case -NFS4ERR_DELAY
:
2793 nfs_inc_server_stats((struct nfs_server
*) server
,
2795 case -NFS4ERR_GRACE
:
2796 rpc_delay(task
, NFS4_POLL_RETRY_MAX
);
2797 task
->tk_status
= 0;
2799 case -NFS4ERR_OLD_STATEID
:
2800 task
->tk_status
= 0;
2803 task
->tk_status
= nfs4_map_errors(task
->tk_status
);
2807 static int nfs4_wait_bit_interruptible(void *word
)
2809 if (signal_pending(current
))
2810 return -ERESTARTSYS
;
2815 static int nfs4_wait_clnt_recover(struct rpc_clnt
*clnt
, struct nfs_client
*clp
)
2822 rwsem_acquire(&clp
->cl_sem
.dep_map
, 0, 0, _RET_IP_
);
2824 rpc_clnt_sigmask(clnt
, &oldset
);
2825 res
= wait_on_bit(&clp
->cl_state
, NFS4CLNT_STATE_RECOVER
,
2826 nfs4_wait_bit_interruptible
,
2827 TASK_INTERRUPTIBLE
);
2828 rpc_clnt_sigunmask(clnt
, &oldset
);
2830 rwsem_release(&clp
->cl_sem
.dep_map
, 1, _RET_IP_
);
2834 static int nfs4_delay(struct rpc_clnt
*clnt
, long *timeout
)
2842 *timeout
= NFS4_POLL_RETRY_MIN
;
2843 if (*timeout
> NFS4_POLL_RETRY_MAX
)
2844 *timeout
= NFS4_POLL_RETRY_MAX
;
2845 rpc_clnt_sigmask(clnt
, &oldset
);
2846 if (clnt
->cl_intr
) {
2847 schedule_timeout_interruptible(*timeout
);
2851 schedule_timeout_uninterruptible(*timeout
);
2852 rpc_clnt_sigunmask(clnt
, &oldset
);
2857 /* This is the error handling routine for processes that are allowed
2860 static int nfs4_handle_exception(const struct nfs_server
*server
, int errorcode
, struct nfs4_exception
*exception
)
2862 struct nfs_client
*clp
= server
->nfs_client
;
2863 int ret
= errorcode
;
2865 exception
->retry
= 0;
2869 case -NFS4ERR_STALE_CLIENTID
:
2870 case -NFS4ERR_STALE_STATEID
:
2871 case -NFS4ERR_EXPIRED
:
2872 nfs4_schedule_state_recovery(clp
);
2873 ret
= nfs4_wait_clnt_recover(server
->client
, clp
);
2875 exception
->retry
= 1;
2877 case -NFS4ERR_FILE_OPEN
:
2878 case -NFS4ERR_GRACE
:
2879 case -NFS4ERR_DELAY
:
2880 ret
= nfs4_delay(server
->client
, &exception
->timeout
);
2883 case -NFS4ERR_OLD_STATEID
:
2884 exception
->retry
= 1;
2886 /* We failed to handle the error */
2887 return nfs4_map_errors(ret
);
2890 int nfs4_proc_setclientid(struct nfs_client
*clp
, u32 program
, unsigned short port
, struct rpc_cred
*cred
)
2892 nfs4_verifier sc_verifier
;
2893 struct nfs4_setclientid setclientid
= {
2894 .sc_verifier
= &sc_verifier
,
2897 struct rpc_message msg
= {
2898 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID
],
2899 .rpc_argp
= &setclientid
,
2907 p
= (__be32
*)sc_verifier
.data
;
2908 *p
++ = htonl((u32
)clp
->cl_boot_time
.tv_sec
);
2909 *p
= htonl((u32
)clp
->cl_boot_time
.tv_nsec
);
2912 setclientid
.sc_name_len
= scnprintf(setclientid
.sc_name
,
2913 sizeof(setclientid
.sc_name
), "%s/%u.%u.%u.%u %s %u",
2914 clp
->cl_ipaddr
, NIPQUAD(clp
->cl_addr
.sin_addr
),
2915 cred
->cr_ops
->cr_name
,
2916 clp
->cl_id_uniquifier
);
2917 setclientid
.sc_netid_len
= scnprintf(setclientid
.sc_netid
,
2918 sizeof(setclientid
.sc_netid
), "tcp");
2919 setclientid
.sc_uaddr_len
= scnprintf(setclientid
.sc_uaddr
,
2920 sizeof(setclientid
.sc_uaddr
), "%s.%d.%d",
2921 clp
->cl_ipaddr
, port
>> 8, port
& 255);
2923 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2924 if (status
!= -NFS4ERR_CLID_INUSE
)
2929 ssleep(clp
->cl_lease_time
+ 1);
2931 if (++clp
->cl_id_uniquifier
== 0)
2937 static int _nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2939 struct nfs_fsinfo fsinfo
;
2940 struct rpc_message msg
= {
2941 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID_CONFIRM
],
2943 .rpc_resp
= &fsinfo
,
2950 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2952 spin_lock(&clp
->cl_lock
);
2953 clp
->cl_lease_time
= fsinfo
.lease_time
* HZ
;
2954 clp
->cl_last_renewal
= now
;
2955 clear_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
);
2956 spin_unlock(&clp
->cl_lock
);
2961 int nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2966 err
= _nfs4_proc_setclientid_confirm(clp
, cred
);
2970 case -NFS4ERR_RESOURCE
:
2971 /* The IBM lawyers misread another document! */
2972 case -NFS4ERR_DELAY
:
2973 err
= nfs4_delay(clp
->cl_rpcclient
, &timeout
);
2979 struct nfs4_delegreturndata
{
2980 struct nfs4_delegreturnargs args
;
2981 struct nfs4_delegreturnres res
;
2983 nfs4_stateid stateid
;
2984 struct rpc_cred
*cred
;
2985 unsigned long timestamp
;
2986 struct nfs_fattr fattr
;
2990 static void nfs4_delegreturn_prepare(struct rpc_task
*task
, void *calldata
)
2992 struct nfs4_delegreturndata
*data
= calldata
;
2993 struct rpc_message msg
= {
2994 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DELEGRETURN
],
2995 .rpc_argp
= &data
->args
,
2996 .rpc_resp
= &data
->res
,
2997 .rpc_cred
= data
->cred
,
2999 nfs_fattr_init(data
->res
.fattr
);
3000 rpc_call_setup(task
, &msg
, 0);
3003 static void nfs4_delegreturn_done(struct rpc_task
*task
, void *calldata
)
3005 struct nfs4_delegreturndata
*data
= calldata
;
3006 data
->rpc_status
= task
->tk_status
;
3007 if (data
->rpc_status
== 0)
3008 renew_lease(data
->res
.server
, data
->timestamp
);
3011 static void nfs4_delegreturn_release(void *calldata
)
3013 struct nfs4_delegreturndata
*data
= calldata
;
3015 put_rpccred(data
->cred
);
3019 static const struct rpc_call_ops nfs4_delegreturn_ops
= {
3020 .rpc_call_prepare
= nfs4_delegreturn_prepare
,
3021 .rpc_call_done
= nfs4_delegreturn_done
,
3022 .rpc_release
= nfs4_delegreturn_release
,
3025 static int _nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
)
3027 struct nfs4_delegreturndata
*data
;
3028 struct nfs_server
*server
= NFS_SERVER(inode
);
3029 struct rpc_task
*task
;
3032 data
= kmalloc(sizeof(*data
), GFP_KERNEL
);
3035 data
->args
.fhandle
= &data
->fh
;
3036 data
->args
.stateid
= &data
->stateid
;
3037 data
->args
.bitmask
= server
->attr_bitmask
;
3038 nfs_copy_fh(&data
->fh
, NFS_FH(inode
));
3039 memcpy(&data
->stateid
, stateid
, sizeof(data
->stateid
));
3040 data
->res
.fattr
= &data
->fattr
;
3041 data
->res
.server
= server
;
3042 data
->cred
= get_rpccred(cred
);
3043 data
->timestamp
= jiffies
;
3044 data
->rpc_status
= 0;
3046 task
= rpc_run_task(NFS_CLIENT(inode
), RPC_TASK_ASYNC
, &nfs4_delegreturn_ops
, data
);
3048 return PTR_ERR(task
);
3049 status
= nfs4_wait_for_completion_rpc_task(task
);
3051 status
= data
->rpc_status
;
3053 nfs_refresh_inode(inode
, &data
->fattr
);
3059 int nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
)
3061 struct nfs_server
*server
= NFS_SERVER(inode
);
3062 struct nfs4_exception exception
= { };
3065 err
= _nfs4_proc_delegreturn(inode
, cred
, stateid
);
3067 case -NFS4ERR_STALE_STATEID
:
3068 case -NFS4ERR_EXPIRED
:
3072 err
= nfs4_handle_exception(server
, err
, &exception
);
3073 } while (exception
.retry
);
3077 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3078 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3081 * sleep, with exponential backoff, and retry the LOCK operation.
3083 static unsigned long
3084 nfs4_set_lock_task_retry(unsigned long timeout
)
3086 schedule_timeout_interruptible(timeout
);
3088 if (timeout
> NFS4_LOCK_MAXTIMEOUT
)
3089 return NFS4_LOCK_MAXTIMEOUT
;
3093 static int _nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3095 struct inode
*inode
= state
->inode
;
3096 struct nfs_server
*server
= NFS_SERVER(inode
);
3097 struct nfs_client
*clp
= server
->nfs_client
;
3098 struct nfs_lockt_args arg
= {
3099 .fh
= NFS_FH(inode
),
3102 struct nfs_lockt_res res
= {
3105 struct rpc_message msg
= {
3106 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKT
],
3109 .rpc_cred
= state
->owner
->so_cred
,
3111 struct nfs4_lock_state
*lsp
;
3114 down_read(&clp
->cl_sem
);
3115 arg
.lock_owner
.clientid
= clp
->cl_clientid
;
3116 status
= nfs4_set_lock_state(state
, request
);
3119 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3120 arg
.lock_owner
.id
= lsp
->ls_id
.id
;
3121 status
= rpc_call_sync(server
->client
, &msg
, 0);
3124 request
->fl_type
= F_UNLCK
;
3126 case -NFS4ERR_DENIED
:
3129 request
->fl_ops
->fl_release_private(request
);
3131 up_read(&clp
->cl_sem
);
3135 static int nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3137 struct nfs4_exception exception
= { };
3141 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3142 _nfs4_proc_getlk(state
, cmd
, request
),
3144 } while (exception
.retry
);
3148 static int do_vfs_lock(struct file
*file
, struct file_lock
*fl
)
3151 switch (fl
->fl_flags
& (FL_POSIX
|FL_FLOCK
)) {
3153 res
= posix_lock_file_wait(file
, fl
);
3156 res
= flock_lock_file_wait(file
, fl
);
3164 struct nfs4_unlockdata
{
3165 struct nfs_locku_args arg
;
3166 struct nfs_locku_res res
;
3167 struct nfs4_lock_state
*lsp
;
3168 struct nfs_open_context
*ctx
;
3169 struct file_lock fl
;
3170 const struct nfs_server
*server
;
3171 unsigned long timestamp
;
3174 static struct nfs4_unlockdata
*nfs4_alloc_unlockdata(struct file_lock
*fl
,
3175 struct nfs_open_context
*ctx
,
3176 struct nfs4_lock_state
*lsp
,
3177 struct nfs_seqid
*seqid
)
3179 struct nfs4_unlockdata
*p
;
3180 struct inode
*inode
= lsp
->ls_state
->inode
;
3182 p
= kmalloc(sizeof(*p
), GFP_KERNEL
);
3185 p
->arg
.fh
= NFS_FH(inode
);
3187 p
->arg
.seqid
= seqid
;
3188 p
->arg
.stateid
= &lsp
->ls_stateid
;
3190 atomic_inc(&lsp
->ls_count
);
3191 /* Ensure we don't close file until we're done freeing locks! */
3192 p
->ctx
= get_nfs_open_context(ctx
);
3193 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3194 p
->server
= NFS_SERVER(inode
);
3198 static void nfs4_locku_release_calldata(void *data
)
3200 struct nfs4_unlockdata
*calldata
= data
;
3201 nfs_free_seqid(calldata
->arg
.seqid
);
3202 nfs4_put_lock_state(calldata
->lsp
);
3203 put_nfs_open_context(calldata
->ctx
);
3207 static void nfs4_locku_done(struct rpc_task
*task
, void *data
)
3209 struct nfs4_unlockdata
*calldata
= data
;
3211 if (RPC_ASSASSINATED(task
))
3213 nfs_increment_lock_seqid(task
->tk_status
, calldata
->arg
.seqid
);
3214 switch (task
->tk_status
) {
3216 memcpy(calldata
->lsp
->ls_stateid
.data
,
3217 calldata
->res
.stateid
.data
,
3218 sizeof(calldata
->lsp
->ls_stateid
.data
));
3219 renew_lease(calldata
->server
, calldata
->timestamp
);
3221 case -NFS4ERR_STALE_STATEID
:
3222 case -NFS4ERR_EXPIRED
:
3225 if (nfs4_async_handle_error(task
, calldata
->server
) == -EAGAIN
)
3226 rpc_restart_call(task
);
3230 static void nfs4_locku_prepare(struct rpc_task
*task
, void *data
)
3232 struct nfs4_unlockdata
*calldata
= data
;
3233 struct rpc_message msg
= {
3234 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKU
],
3235 .rpc_argp
= &calldata
->arg
,
3236 .rpc_resp
= &calldata
->res
,
3237 .rpc_cred
= calldata
->lsp
->ls_state
->owner
->so_cred
,
3240 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
3242 if ((calldata
->lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) == 0) {
3243 /* Note: exit _without_ running nfs4_locku_done */
3244 task
->tk_action
= NULL
;
3247 calldata
->timestamp
= jiffies
;
3248 rpc_call_setup(task
, &msg
, 0);
3251 static const struct rpc_call_ops nfs4_locku_ops
= {
3252 .rpc_call_prepare
= nfs4_locku_prepare
,
3253 .rpc_call_done
= nfs4_locku_done
,
3254 .rpc_release
= nfs4_locku_release_calldata
,
3257 static struct rpc_task
*nfs4_do_unlck(struct file_lock
*fl
,
3258 struct nfs_open_context
*ctx
,
3259 struct nfs4_lock_state
*lsp
,
3260 struct nfs_seqid
*seqid
)
3262 struct nfs4_unlockdata
*data
;
3264 /* Ensure this is an unlock - when canceling a lock, the
3265 * canceled lock is passed in, and it won't be an unlock.
3267 fl
->fl_type
= F_UNLCK
;
3269 data
= nfs4_alloc_unlockdata(fl
, ctx
, lsp
, seqid
);
3271 nfs_free_seqid(seqid
);
3272 return ERR_PTR(-ENOMEM
);
3275 return rpc_run_task(NFS_CLIENT(lsp
->ls_state
->inode
), RPC_TASK_ASYNC
, &nfs4_locku_ops
, data
);
3278 static int nfs4_proc_unlck(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3280 struct nfs_seqid
*seqid
;
3281 struct nfs4_lock_state
*lsp
;
3282 struct rpc_task
*task
;
3285 status
= nfs4_set_lock_state(state
, request
);
3286 /* Unlock _before_ we do the RPC call */
3287 request
->fl_flags
|= FL_EXISTS
;
3288 if (do_vfs_lock(request
->fl_file
, request
) == -ENOENT
)
3292 /* Is this a delegated lock? */
3293 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
3295 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3296 seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3300 task
= nfs4_do_unlck(request
, nfs_file_open_context(request
->fl_file
), lsp
, seqid
);
3301 status
= PTR_ERR(task
);
3304 status
= nfs4_wait_for_completion_rpc_task(task
);
3310 struct nfs4_lockdata
{
3311 struct nfs_lock_args arg
;
3312 struct nfs_lock_res res
;
3313 struct nfs4_lock_state
*lsp
;
3314 struct nfs_open_context
*ctx
;
3315 struct file_lock fl
;
3316 unsigned long timestamp
;
3321 static struct nfs4_lockdata
*nfs4_alloc_lockdata(struct file_lock
*fl
,
3322 struct nfs_open_context
*ctx
, struct nfs4_lock_state
*lsp
)
3324 struct nfs4_lockdata
*p
;
3325 struct inode
*inode
= lsp
->ls_state
->inode
;
3326 struct nfs_server
*server
= NFS_SERVER(inode
);
3328 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
3332 p
->arg
.fh
= NFS_FH(inode
);
3334 if (!(lsp
->ls_seqid
.flags
& NFS_SEQID_CONFIRMED
)) {
3335 p
->arg
.open_seqid
= nfs_alloc_seqid(&lsp
->ls_state
->owner
->so_seqid
);
3336 if (p
->arg
.open_seqid
== NULL
)
3340 p
->arg
.lock_seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3341 if (p
->arg
.lock_seqid
== NULL
)
3343 p
->arg
.lock_stateid
= &lsp
->ls_stateid
;
3344 p
->arg
.lock_owner
.clientid
= server
->nfs_client
->cl_clientid
;
3345 p
->arg
.lock_owner
.id
= lsp
->ls_id
.id
;
3347 atomic_inc(&lsp
->ls_count
);
3348 p
->ctx
= get_nfs_open_context(ctx
);
3349 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3352 if (p
->arg
.open_seqid
!= NULL
)
3353 nfs_free_seqid(p
->arg
.open_seqid
);
3358 static void nfs4_lock_prepare(struct rpc_task
*task
, void *calldata
)
3360 struct nfs4_lockdata
*data
= calldata
;
3361 struct nfs4_state
*state
= data
->lsp
->ls_state
;
3362 struct nfs4_state_owner
*sp
= state
->owner
;
3363 struct rpc_message msg
= {
3364 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCK
],
3365 .rpc_argp
= &data
->arg
,
3366 .rpc_resp
= &data
->res
,
3367 .rpc_cred
= sp
->so_cred
,
3370 dprintk("%s: begin!\n", __FUNCTION__
);
3371 /* Do we need to do an open_to_lock_owner? */
3372 if (!(data
->arg
.lock_seqid
->sequence
->flags
& NFS_SEQID_CONFIRMED
)) {
3373 if (nfs_wait_on_sequence(data
->arg
.open_seqid
, task
) != 0)
3375 data
->arg
.open_stateid
= &state
->stateid
;
3376 data
->arg
.new_lock_owner
= 1;
3377 /* Retest in case we raced... */
3378 if (!(data
->arg
.lock_seqid
->sequence
->flags
& NFS_SEQID_CONFIRMED
))
3381 if (nfs_wait_on_sequence(data
->arg
.lock_seqid
, task
) != 0)
3383 data
->arg
.new_lock_owner
= 0;
3385 data
->timestamp
= jiffies
;
3386 rpc_call_setup(task
, &msg
, 0);
3387 dprintk("%s: done!, ret = %d\n", __FUNCTION__
, data
->rpc_status
);
3390 static void nfs4_lock_done(struct rpc_task
*task
, void *calldata
)
3392 struct nfs4_lockdata
*data
= calldata
;
3394 dprintk("%s: begin!\n", __FUNCTION__
);
3396 data
->rpc_status
= task
->tk_status
;
3397 if (RPC_ASSASSINATED(task
))
3399 if (data
->arg
.new_lock_owner
!= 0) {
3400 nfs_increment_open_seqid(data
->rpc_status
, data
->arg
.open_seqid
);
3401 if (data
->rpc_status
== 0)
3402 nfs_confirm_seqid(&data
->lsp
->ls_seqid
, 0);
3406 if (data
->rpc_status
== 0) {
3407 memcpy(data
->lsp
->ls_stateid
.data
, data
->res
.stateid
.data
,
3408 sizeof(data
->lsp
->ls_stateid
.data
));
3409 data
->lsp
->ls_flags
|= NFS_LOCK_INITIALIZED
;
3410 renew_lease(NFS_SERVER(data
->ctx
->path
.dentry
->d_inode
), data
->timestamp
);
3412 nfs_increment_lock_seqid(data
->rpc_status
, data
->arg
.lock_seqid
);
3414 dprintk("%s: done, ret = %d!\n", __FUNCTION__
, data
->rpc_status
);
3417 static void nfs4_lock_release(void *calldata
)
3419 struct nfs4_lockdata
*data
= calldata
;
3421 dprintk("%s: begin!\n", __FUNCTION__
);
3422 if (data
->cancelled
!= 0) {
3423 struct rpc_task
*task
;
3424 task
= nfs4_do_unlck(&data
->fl
, data
->ctx
, data
->lsp
,
3425 data
->arg
.lock_seqid
);
3428 dprintk("%s: cancelling lock!\n", __FUNCTION__
);
3430 nfs_free_seqid(data
->arg
.lock_seqid
);
3431 if (data
->arg
.open_seqid
!= NULL
)
3432 nfs_free_seqid(data
->arg
.open_seqid
);
3433 nfs4_put_lock_state(data
->lsp
);
3434 put_nfs_open_context(data
->ctx
);
3436 dprintk("%s: done!\n", __FUNCTION__
);
3439 static const struct rpc_call_ops nfs4_lock_ops
= {
3440 .rpc_call_prepare
= nfs4_lock_prepare
,
3441 .rpc_call_done
= nfs4_lock_done
,
3442 .rpc_release
= nfs4_lock_release
,
3445 static int _nfs4_do_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*fl
, int reclaim
)
3447 struct nfs4_lockdata
*data
;
3448 struct rpc_task
*task
;
3451 dprintk("%s: begin!\n", __FUNCTION__
);
3452 data
= nfs4_alloc_lockdata(fl
, nfs_file_open_context(fl
->fl_file
),
3453 fl
->fl_u
.nfs4_fl
.owner
);
3457 data
->arg
.block
= 1;
3459 data
->arg
.reclaim
= 1;
3460 task
= rpc_run_task(NFS_CLIENT(state
->inode
), RPC_TASK_ASYNC
,
3461 &nfs4_lock_ops
, data
);
3463 return PTR_ERR(task
);
3464 ret
= nfs4_wait_for_completion_rpc_task(task
);
3466 ret
= data
->rpc_status
;
3467 if (ret
== -NFS4ERR_DENIED
)
3470 data
->cancelled
= 1;
3472 dprintk("%s: done, ret = %d!\n", __FUNCTION__
, ret
);
3476 static int nfs4_lock_reclaim(struct nfs4_state
*state
, struct file_lock
*request
)
3478 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3479 struct nfs4_exception exception
= { };
3483 /* Cache the lock if possible... */
3484 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
3486 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 1);
3487 if (err
!= -NFS4ERR_DELAY
)
3489 nfs4_handle_exception(server
, err
, &exception
);
3490 } while (exception
.retry
);
3494 static int nfs4_lock_expired(struct nfs4_state
*state
, struct file_lock
*request
)
3496 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3497 struct nfs4_exception exception
= { };
3500 err
= nfs4_set_lock_state(state
, request
);
3504 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
3506 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 0);
3507 if (err
!= -NFS4ERR_DELAY
)
3509 nfs4_handle_exception(server
, err
, &exception
);
3510 } while (exception
.retry
);
3514 static int _nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3516 struct nfs_client
*clp
= state
->owner
->so_client
;
3517 unsigned char fl_flags
= request
->fl_flags
;
3520 /* Is this a delegated open? */
3521 status
= nfs4_set_lock_state(state
, request
);
3524 request
->fl_flags
|= FL_ACCESS
;
3525 status
= do_vfs_lock(request
->fl_file
, request
);
3528 down_read(&clp
->cl_sem
);
3529 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
)) {
3530 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
3531 /* Yes: cache locks! */
3532 down_read(&nfsi
->rwsem
);
3533 /* ...but avoid races with delegation recall... */
3534 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
)) {
3535 request
->fl_flags
= fl_flags
& ~FL_SLEEP
;
3536 status
= do_vfs_lock(request
->fl_file
, request
);
3537 up_read(&nfsi
->rwsem
);
3540 up_read(&nfsi
->rwsem
);
3542 status
= _nfs4_do_setlk(state
, cmd
, request
, 0);
3545 /* Note: we always want to sleep here! */
3546 request
->fl_flags
= fl_flags
| FL_SLEEP
;
3547 if (do_vfs_lock(request
->fl_file
, request
) < 0)
3548 printk(KERN_WARNING
"%s: VFS is out of sync with lock manager!\n", __FUNCTION__
);
3550 up_read(&clp
->cl_sem
);
3552 request
->fl_flags
= fl_flags
;
3556 static int nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3558 struct nfs4_exception exception
= { };
3562 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3563 _nfs4_proc_setlk(state
, cmd
, request
),
3565 } while (exception
.retry
);
3570 nfs4_proc_lock(struct file
*filp
, int cmd
, struct file_lock
*request
)
3572 struct nfs_open_context
*ctx
;
3573 struct nfs4_state
*state
;
3574 unsigned long timeout
= NFS4_LOCK_MINTIMEOUT
;
3577 /* verify open state */
3578 ctx
= nfs_file_open_context(filp
);
3581 if (request
->fl_start
< 0 || request
->fl_end
< 0)
3585 return nfs4_proc_getlk(state
, F_GETLK
, request
);
3587 if (!(IS_SETLK(cmd
) || IS_SETLKW(cmd
)))
3590 if (request
->fl_type
== F_UNLCK
)
3591 return nfs4_proc_unlck(state
, cmd
, request
);
3594 status
= nfs4_proc_setlk(state
, cmd
, request
);
3595 if ((status
!= -EAGAIN
) || IS_SETLK(cmd
))
3597 timeout
= nfs4_set_lock_task_retry(timeout
);
3598 status
= -ERESTARTSYS
;
3601 } while(status
< 0);
3605 int nfs4_lock_delegation_recall(struct nfs4_state
*state
, struct file_lock
*fl
)
3607 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3608 struct nfs4_exception exception
= { };
3611 err
= nfs4_set_lock_state(state
, fl
);
3615 err
= _nfs4_do_setlk(state
, F_SETLK
, fl
, 0);
3616 if (err
!= -NFS4ERR_DELAY
)
3618 err
= nfs4_handle_exception(server
, err
, &exception
);
3619 } while (exception
.retry
);
3624 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3626 int nfs4_setxattr(struct dentry
*dentry
, const char *key
, const void *buf
,
3627 size_t buflen
, int flags
)
3629 struct inode
*inode
= dentry
->d_inode
;
3631 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
3634 if (!S_ISREG(inode
->i_mode
) &&
3635 (!S_ISDIR(inode
->i_mode
) || inode
->i_mode
& S_ISVTX
))
3638 return nfs4_proc_set_acl(inode
, buf
, buflen
);
3641 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3642 * and that's what we'll do for e.g. user attributes that haven't been set.
3643 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3644 * attributes in kernel-managed attribute namespaces. */
3645 ssize_t
nfs4_getxattr(struct dentry
*dentry
, const char *key
, void *buf
,
3648 struct inode
*inode
= dentry
->d_inode
;
3650 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
3653 return nfs4_proc_get_acl(inode
, buf
, buflen
);
3656 ssize_t
nfs4_listxattr(struct dentry
*dentry
, char *buf
, size_t buflen
)
3658 size_t len
= strlen(XATTR_NAME_NFSV4_ACL
) + 1;
3660 if (!nfs4_server_supports_acls(NFS_SERVER(dentry
->d_inode
)))
3662 if (buf
&& buflen
< len
)
3665 memcpy(buf
, XATTR_NAME_NFSV4_ACL
, len
);
3669 int nfs4_proc_fs_locations(struct inode
*dir
, const struct qstr
*name
,
3670 struct nfs4_fs_locations
*fs_locations
, struct page
*page
)
3672 struct nfs_server
*server
= NFS_SERVER(dir
);
3674 [0] = FATTR4_WORD0_FSID
| FATTR4_WORD0_FS_LOCATIONS
,
3675 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID
,
3677 struct nfs4_fs_locations_arg args
= {
3678 .dir_fh
= NFS_FH(dir
),
3683 struct rpc_message msg
= {
3684 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FS_LOCATIONS
],
3686 .rpc_resp
= fs_locations
,
3690 dprintk("%s: start\n", __FUNCTION__
);
3691 nfs_fattr_init(&fs_locations
->fattr
);
3692 fs_locations
->server
= server
;
3693 fs_locations
->nlocations
= 0;
3694 status
= rpc_call_sync(server
->client
, &msg
, 0);
3695 dprintk("%s: returned status = %d\n", __FUNCTION__
, status
);
3699 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops
= {
3700 .recover_open
= nfs4_open_reclaim
,
3701 .recover_lock
= nfs4_lock_reclaim
,
3704 struct nfs4_state_recovery_ops nfs4_network_partition_recovery_ops
= {
3705 .recover_open
= nfs4_open_expired
,
3706 .recover_lock
= nfs4_lock_expired
,
3709 static const struct inode_operations nfs4_file_inode_operations
= {
3710 .permission
= nfs_permission
,
3711 .getattr
= nfs_getattr
,
3712 .setattr
= nfs_setattr
,
3713 .getxattr
= nfs4_getxattr
,
3714 .setxattr
= nfs4_setxattr
,
3715 .listxattr
= nfs4_listxattr
,
3718 const struct nfs_rpc_ops nfs_v4_clientops
= {
3719 .version
= 4, /* protocol version */
3720 .dentry_ops
= &nfs4_dentry_operations
,
3721 .dir_inode_ops
= &nfs4_dir_inode_operations
,
3722 .file_inode_ops
= &nfs4_file_inode_operations
,
3723 .getroot
= nfs4_proc_get_root
,
3724 .getattr
= nfs4_proc_getattr
,
3725 .setattr
= nfs4_proc_setattr
,
3726 .lookupfh
= nfs4_proc_lookupfh
,
3727 .lookup
= nfs4_proc_lookup
,
3728 .access
= nfs4_proc_access
,
3729 .readlink
= nfs4_proc_readlink
,
3730 .create
= nfs4_proc_create
,
3731 .remove
= nfs4_proc_remove
,
3732 .unlink_setup
= nfs4_proc_unlink_setup
,
3733 .unlink_done
= nfs4_proc_unlink_done
,
3734 .rename
= nfs4_proc_rename
,
3735 .link
= nfs4_proc_link
,
3736 .symlink
= nfs4_proc_symlink
,
3737 .mkdir
= nfs4_proc_mkdir
,
3738 .rmdir
= nfs4_proc_remove
,
3739 .readdir
= nfs4_proc_readdir
,
3740 .mknod
= nfs4_proc_mknod
,
3741 .statfs
= nfs4_proc_statfs
,
3742 .fsinfo
= nfs4_proc_fsinfo
,
3743 .pathconf
= nfs4_proc_pathconf
,
3744 .set_capabilities
= nfs4_server_capabilities
,
3745 .decode_dirent
= nfs4_decode_dirent
,
3746 .read_setup
= nfs4_proc_read_setup
,
3747 .read_done
= nfs4_read_done
,
3748 .write_setup
= nfs4_proc_write_setup
,
3749 .write_done
= nfs4_write_done
,
3750 .commit_setup
= nfs4_proc_commit_setup
,
3751 .commit_done
= nfs4_commit_done
,
3752 .file_open
= nfs_open
,
3753 .file_release
= nfs_release
,
3754 .lock
= nfs4_proc_lock
,
3755 .clear_acl_cache
= nfs4_zap_acl_attr
,