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"
57 #define NFSDBG_FACILITY NFSDBG_PROC
59 #define NFS4_POLL_RETRY_MIN (HZ/10)
60 #define NFS4_POLL_RETRY_MAX (15*HZ)
63 static int _nfs4_proc_open(struct nfs4_opendata
*data
);
64 static int nfs4_do_fsinfo(struct nfs_server
*, struct nfs_fh
*, struct nfs_fsinfo
*);
65 static int nfs4_async_handle_error(struct rpc_task
*, const struct nfs_server
*, struct nfs4_state
*);
66 static int _nfs4_proc_lookup(struct inode
*dir
, const struct qstr
*name
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
);
67 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
);
69 /* Prevent leaks of NFSv4 errors into userland */
70 static int nfs4_map_errors(int err
)
73 dprintk("%s could not handle NFSv4 error %d\n",
81 * This is our standard bitmap for GETATTR requests.
83 const u32 nfs4_fattr_bitmap
[2] = {
88 | FATTR4_WORD0_FILEID
,
90 | FATTR4_WORD1_NUMLINKS
92 | FATTR4_WORD1_OWNER_GROUP
94 | FATTR4_WORD1_SPACE_USED
95 | FATTR4_WORD1_TIME_ACCESS
96 | FATTR4_WORD1_TIME_METADATA
97 | FATTR4_WORD1_TIME_MODIFY
100 const u32 nfs4_statfs_bitmap
[2] = {
101 FATTR4_WORD0_FILES_AVAIL
102 | FATTR4_WORD0_FILES_FREE
103 | FATTR4_WORD0_FILES_TOTAL
,
104 FATTR4_WORD1_SPACE_AVAIL
105 | FATTR4_WORD1_SPACE_FREE
106 | FATTR4_WORD1_SPACE_TOTAL
109 const u32 nfs4_pathconf_bitmap
[2] = {
111 | FATTR4_WORD0_MAXNAME
,
115 const u32 nfs4_fsinfo_bitmap
[2] = { FATTR4_WORD0_MAXFILESIZE
116 | FATTR4_WORD0_MAXREAD
117 | FATTR4_WORD0_MAXWRITE
118 | FATTR4_WORD0_LEASE_TIME
,
122 const u32 nfs4_fs_locations_bitmap
[2] = {
124 | FATTR4_WORD0_CHANGE
127 | FATTR4_WORD0_FILEID
128 | FATTR4_WORD0_FS_LOCATIONS
,
130 | FATTR4_WORD1_NUMLINKS
132 | FATTR4_WORD1_OWNER_GROUP
133 | FATTR4_WORD1_RAWDEV
134 | FATTR4_WORD1_SPACE_USED
135 | FATTR4_WORD1_TIME_ACCESS
136 | FATTR4_WORD1_TIME_METADATA
137 | FATTR4_WORD1_TIME_MODIFY
138 | FATTR4_WORD1_MOUNTED_ON_FILEID
141 static void nfs4_setup_readdir(u64 cookie
, __be32
*verifier
, struct dentry
*dentry
,
142 struct nfs4_readdir_arg
*readdir
)
146 BUG_ON(readdir
->count
< 80);
148 readdir
->cookie
= cookie
;
149 memcpy(&readdir
->verifier
, verifier
, sizeof(readdir
->verifier
));
154 memset(&readdir
->verifier
, 0, sizeof(readdir
->verifier
));
159 * NFSv4 servers do not return entries for '.' and '..'
160 * Therefore, we fake these entries here. We let '.'
161 * have cookie 0 and '..' have cookie 1. Note that
162 * when talking to the server, we always send cookie 0
165 start
= p
= kmap_atomic(*readdir
->pages
, KM_USER0
);
168 *p
++ = xdr_one
; /* next */
169 *p
++ = xdr_zero
; /* cookie, first word */
170 *p
++ = xdr_one
; /* cookie, second word */
171 *p
++ = xdr_one
; /* entry len */
172 memcpy(p
, ".\0\0\0", 4); /* entry */
174 *p
++ = xdr_one
; /* bitmap length */
175 *p
++ = htonl(FATTR4_WORD0_FILEID
); /* bitmap */
176 *p
++ = htonl(8); /* attribute buffer length */
177 p
= xdr_encode_hyper(p
, NFS_FILEID(dentry
->d_inode
));
180 *p
++ = xdr_one
; /* next */
181 *p
++ = xdr_zero
; /* cookie, first word */
182 *p
++ = xdr_two
; /* cookie, second word */
183 *p
++ = xdr_two
; /* entry len */
184 memcpy(p
, "..\0\0", 4); /* entry */
186 *p
++ = xdr_one
; /* bitmap length */
187 *p
++ = htonl(FATTR4_WORD0_FILEID
); /* bitmap */
188 *p
++ = htonl(8); /* attribute buffer length */
189 p
= xdr_encode_hyper(p
, NFS_FILEID(dentry
->d_parent
->d_inode
));
191 readdir
->pgbase
= (char *)p
- (char *)start
;
192 readdir
->count
-= readdir
->pgbase
;
193 kunmap_atomic(start
, KM_USER0
);
196 static int nfs4_wait_clnt_recover(struct nfs_client
*clp
)
202 res
= wait_on_bit(&clp
->cl_state
, NFS4CLNT_MANAGER_RUNNING
,
203 nfs_wait_bit_killable
, TASK_KILLABLE
);
207 static int nfs4_delay(struct rpc_clnt
*clnt
, long *timeout
)
214 *timeout
= NFS4_POLL_RETRY_MIN
;
215 if (*timeout
> NFS4_POLL_RETRY_MAX
)
216 *timeout
= NFS4_POLL_RETRY_MAX
;
217 schedule_timeout_killable(*timeout
);
218 if (fatal_signal_pending(current
))
224 /* This is the error handling routine for processes that are allowed
227 static int nfs4_handle_exception(const struct nfs_server
*server
, int errorcode
, struct nfs4_exception
*exception
)
229 struct nfs_client
*clp
= server
->nfs_client
;
230 struct nfs4_state
*state
= exception
->state
;
233 exception
->retry
= 0;
237 case -NFS4ERR_ADMIN_REVOKED
:
238 case -NFS4ERR_BAD_STATEID
:
239 case -NFS4ERR_OPENMODE
:
242 nfs4_state_mark_reclaim_nograce(clp
, state
);
243 case -NFS4ERR_STALE_CLIENTID
:
244 case -NFS4ERR_STALE_STATEID
:
245 case -NFS4ERR_EXPIRED
:
246 nfs4_schedule_state_recovery(clp
);
247 ret
= nfs4_wait_clnt_recover(clp
);
249 exception
->retry
= 1;
251 case -NFS4ERR_FILE_OPEN
:
254 ret
= nfs4_delay(server
->client
, &exception
->timeout
);
257 case -NFS4ERR_OLD_STATEID
:
258 exception
->retry
= 1;
260 /* We failed to handle the error */
261 return nfs4_map_errors(ret
);
265 static void renew_lease(const struct nfs_server
*server
, unsigned long timestamp
)
267 struct nfs_client
*clp
= server
->nfs_client
;
268 spin_lock(&clp
->cl_lock
);
269 if (time_before(clp
->cl_last_renewal
,timestamp
))
270 clp
->cl_last_renewal
= timestamp
;
271 spin_unlock(&clp
->cl_lock
);
274 static void update_changeattr(struct inode
*dir
, struct nfs4_change_info
*cinfo
)
276 struct nfs_inode
*nfsi
= NFS_I(dir
);
278 spin_lock(&dir
->i_lock
);
279 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
|NFS_INO_INVALID_DATA
;
280 if (!cinfo
->atomic
|| cinfo
->before
!= nfsi
->change_attr
)
281 nfs_force_lookup_revalidate(dir
);
282 nfsi
->change_attr
= cinfo
->after
;
283 spin_unlock(&dir
->i_lock
);
286 struct nfs4_opendata
{
288 struct nfs_openargs o_arg
;
289 struct nfs_openres o_res
;
290 struct nfs_open_confirmargs c_arg
;
291 struct nfs_open_confirmres c_res
;
292 struct nfs_fattr f_attr
;
293 struct nfs_fattr dir_attr
;
296 struct nfs4_state_owner
*owner
;
297 struct nfs4_state
*state
;
299 unsigned long timestamp
;
300 unsigned int rpc_done
: 1;
306 static void nfs4_init_opendata_res(struct nfs4_opendata
*p
)
308 p
->o_res
.f_attr
= &p
->f_attr
;
309 p
->o_res
.dir_attr
= &p
->dir_attr
;
310 p
->o_res
.seqid
= p
->o_arg
.seqid
;
311 p
->c_res
.seqid
= p
->c_arg
.seqid
;
312 p
->o_res
.server
= p
->o_arg
.server
;
313 nfs_fattr_init(&p
->f_attr
);
314 nfs_fattr_init(&p
->dir_attr
);
317 static struct nfs4_opendata
*nfs4_opendata_alloc(struct path
*path
,
318 struct nfs4_state_owner
*sp
, fmode_t fmode
, int flags
,
319 const struct iattr
*attrs
)
321 struct dentry
*parent
= dget_parent(path
->dentry
);
322 struct inode
*dir
= parent
->d_inode
;
323 struct nfs_server
*server
= NFS_SERVER(dir
);
324 struct nfs4_opendata
*p
;
326 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
329 p
->o_arg
.seqid
= nfs_alloc_seqid(&sp
->so_seqid
);
330 if (p
->o_arg
.seqid
== NULL
)
332 p
->path
.mnt
= mntget(path
->mnt
);
333 p
->path
.dentry
= dget(path
->dentry
);
336 atomic_inc(&sp
->so_count
);
337 p
->o_arg
.fh
= NFS_FH(dir
);
338 p
->o_arg
.open_flags
= flags
;
339 p
->o_arg
.fmode
= fmode
& (FMODE_READ
|FMODE_WRITE
);
340 p
->o_arg
.clientid
= server
->nfs_client
->cl_clientid
;
341 p
->o_arg
.id
= sp
->so_owner_id
.id
;
342 p
->o_arg
.name
= &p
->path
.dentry
->d_name
;
343 p
->o_arg
.server
= server
;
344 p
->o_arg
.bitmask
= server
->attr_bitmask
;
345 p
->o_arg
.claim
= NFS4_OPEN_CLAIM_NULL
;
346 if (flags
& O_EXCL
) {
347 u32
*s
= (u32
*) p
->o_arg
.u
.verifier
.data
;
350 } else if (flags
& O_CREAT
) {
351 p
->o_arg
.u
.attrs
= &p
->attrs
;
352 memcpy(&p
->attrs
, attrs
, sizeof(p
->attrs
));
354 p
->c_arg
.fh
= &p
->o_res
.fh
;
355 p
->c_arg
.stateid
= &p
->o_res
.stateid
;
356 p
->c_arg
.seqid
= p
->o_arg
.seqid
;
357 nfs4_init_opendata_res(p
);
367 static void nfs4_opendata_free(struct kref
*kref
)
369 struct nfs4_opendata
*p
= container_of(kref
,
370 struct nfs4_opendata
, kref
);
372 nfs_free_seqid(p
->o_arg
.seqid
);
373 if (p
->state
!= NULL
)
374 nfs4_put_open_state(p
->state
);
375 nfs4_put_state_owner(p
->owner
);
381 static void nfs4_opendata_put(struct nfs4_opendata
*p
)
384 kref_put(&p
->kref
, nfs4_opendata_free
);
387 static int nfs4_wait_for_completion_rpc_task(struct rpc_task
*task
)
391 ret
= rpc_wait_for_completion_task(task
);
395 static int can_open_cached(struct nfs4_state
*state
, fmode_t mode
, int open_mode
)
399 if (open_mode
& O_EXCL
)
401 switch (mode
& (FMODE_READ
|FMODE_WRITE
)) {
403 ret
|= test_bit(NFS_O_RDONLY_STATE
, &state
->flags
) != 0;
406 ret
|= test_bit(NFS_O_WRONLY_STATE
, &state
->flags
) != 0;
408 case FMODE_READ
|FMODE_WRITE
:
409 ret
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
) != 0;
415 static int can_open_delegated(struct nfs_delegation
*delegation
, fmode_t fmode
)
417 if ((delegation
->type
& fmode
) != fmode
)
419 if (test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
))
421 nfs_mark_delegation_referenced(delegation
);
425 static void update_open_stateflags(struct nfs4_state
*state
, fmode_t fmode
)
434 case FMODE_READ
|FMODE_WRITE
:
437 nfs4_state_set_mode_locked(state
, state
->state
| fmode
);
440 static void nfs_set_open_stateid_locked(struct nfs4_state
*state
, nfs4_stateid
*stateid
, fmode_t fmode
)
442 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0)
443 memcpy(state
->stateid
.data
, stateid
->data
, sizeof(state
->stateid
.data
));
444 memcpy(state
->open_stateid
.data
, stateid
->data
, sizeof(state
->open_stateid
.data
));
447 set_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
450 set_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
452 case FMODE_READ
|FMODE_WRITE
:
453 set_bit(NFS_O_RDWR_STATE
, &state
->flags
);
457 static void nfs_set_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*stateid
, fmode_t fmode
)
459 write_seqlock(&state
->seqlock
);
460 nfs_set_open_stateid_locked(state
, stateid
, fmode
);
461 write_sequnlock(&state
->seqlock
);
464 static void __update_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*open_stateid
, const nfs4_stateid
*deleg_stateid
, fmode_t fmode
)
467 * Protect the call to nfs4_state_set_mode_locked and
468 * serialise the stateid update
470 write_seqlock(&state
->seqlock
);
471 if (deleg_stateid
!= NULL
) {
472 memcpy(state
->stateid
.data
, deleg_stateid
->data
, sizeof(state
->stateid
.data
));
473 set_bit(NFS_DELEGATED_STATE
, &state
->flags
);
475 if (open_stateid
!= NULL
)
476 nfs_set_open_stateid_locked(state
, open_stateid
, fmode
);
477 write_sequnlock(&state
->seqlock
);
478 spin_lock(&state
->owner
->so_lock
);
479 update_open_stateflags(state
, fmode
);
480 spin_unlock(&state
->owner
->so_lock
);
483 static int update_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*open_stateid
, nfs4_stateid
*delegation
, fmode_t fmode
)
485 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
486 struct nfs_delegation
*deleg_cur
;
489 fmode
&= (FMODE_READ
|FMODE_WRITE
);
492 deleg_cur
= rcu_dereference(nfsi
->delegation
);
493 if (deleg_cur
== NULL
)
496 spin_lock(&deleg_cur
->lock
);
497 if (nfsi
->delegation
!= deleg_cur
||
498 (deleg_cur
->type
& fmode
) != fmode
)
499 goto no_delegation_unlock
;
501 if (delegation
== NULL
)
502 delegation
= &deleg_cur
->stateid
;
503 else if (memcmp(deleg_cur
->stateid
.data
, delegation
->data
, NFS4_STATEID_SIZE
) != 0)
504 goto no_delegation_unlock
;
506 nfs_mark_delegation_referenced(deleg_cur
);
507 __update_open_stateid(state
, open_stateid
, &deleg_cur
->stateid
, fmode
);
509 no_delegation_unlock
:
510 spin_unlock(&deleg_cur
->lock
);
514 if (!ret
&& open_stateid
!= NULL
) {
515 __update_open_stateid(state
, open_stateid
, NULL
, fmode
);
523 static void nfs4_return_incompatible_delegation(struct inode
*inode
, fmode_t fmode
)
525 struct nfs_delegation
*delegation
;
528 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
529 if (delegation
== NULL
|| (delegation
->type
& fmode
) == fmode
) {
534 nfs_inode_return_delegation(inode
);
537 static struct nfs4_state
*nfs4_try_open_cached(struct nfs4_opendata
*opendata
)
539 struct nfs4_state
*state
= opendata
->state
;
540 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
541 struct nfs_delegation
*delegation
;
542 int open_mode
= opendata
->o_arg
.open_flags
& O_EXCL
;
543 fmode_t fmode
= opendata
->o_arg
.fmode
;
544 nfs4_stateid stateid
;
548 if (can_open_cached(state
, fmode
, open_mode
)) {
549 spin_lock(&state
->owner
->so_lock
);
550 if (can_open_cached(state
, fmode
, open_mode
)) {
551 update_open_stateflags(state
, fmode
);
552 spin_unlock(&state
->owner
->so_lock
);
553 goto out_return_state
;
555 spin_unlock(&state
->owner
->so_lock
);
558 delegation
= rcu_dereference(nfsi
->delegation
);
559 if (delegation
== NULL
||
560 !can_open_delegated(delegation
, fmode
)) {
564 /* Save the delegation */
565 memcpy(stateid
.data
, delegation
->stateid
.data
, sizeof(stateid
.data
));
567 ret
= nfs_may_open(state
->inode
, state
->owner
->so_cred
, open_mode
);
572 /* Try to update the stateid using the delegation */
573 if (update_open_stateid(state
, NULL
, &stateid
, fmode
))
574 goto out_return_state
;
579 atomic_inc(&state
->count
);
583 static struct nfs4_state
*nfs4_opendata_to_nfs4_state(struct nfs4_opendata
*data
)
586 struct nfs4_state
*state
= NULL
;
587 struct nfs_delegation
*delegation
;
590 if (!data
->rpc_done
) {
591 state
= nfs4_try_open_cached(data
);
596 if (!(data
->f_attr
.valid
& NFS_ATTR_FATTR
))
598 inode
= nfs_fhget(data
->dir
->d_sb
, &data
->o_res
.fh
, &data
->f_attr
);
599 ret
= PTR_ERR(inode
);
603 state
= nfs4_get_open_state(inode
, data
->owner
);
606 if (data
->o_res
.delegation_type
!= 0) {
607 int delegation_flags
= 0;
610 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
612 delegation_flags
= delegation
->flags
;
614 if ((delegation_flags
& 1UL<<NFS_DELEGATION_NEED_RECLAIM
) == 0)
615 nfs_inode_set_delegation(state
->inode
,
616 data
->owner
->so_cred
,
619 nfs_inode_reclaim_delegation(state
->inode
,
620 data
->owner
->so_cred
,
624 update_open_stateid(state
, &data
->o_res
.stateid
, NULL
,
635 static struct nfs_open_context
*nfs4_state_find_open_context(struct nfs4_state
*state
)
637 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
638 struct nfs_open_context
*ctx
;
640 spin_lock(&state
->inode
->i_lock
);
641 list_for_each_entry(ctx
, &nfsi
->open_files
, list
) {
642 if (ctx
->state
!= state
)
644 get_nfs_open_context(ctx
);
645 spin_unlock(&state
->inode
->i_lock
);
648 spin_unlock(&state
->inode
->i_lock
);
649 return ERR_PTR(-ENOENT
);
652 static struct nfs4_opendata
*nfs4_open_recoverdata_alloc(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
654 struct nfs4_opendata
*opendata
;
656 opendata
= nfs4_opendata_alloc(&ctx
->path
, state
->owner
, 0, 0, NULL
);
657 if (opendata
== NULL
)
658 return ERR_PTR(-ENOMEM
);
659 opendata
->state
= state
;
660 atomic_inc(&state
->count
);
664 static int nfs4_open_recover_helper(struct nfs4_opendata
*opendata
, fmode_t fmode
, struct nfs4_state
**res
)
666 struct nfs4_state
*newstate
;
669 opendata
->o_arg
.open_flags
= 0;
670 opendata
->o_arg
.fmode
= fmode
;
671 memset(&opendata
->o_res
, 0, sizeof(opendata
->o_res
));
672 memset(&opendata
->c_res
, 0, sizeof(opendata
->c_res
));
673 nfs4_init_opendata_res(opendata
);
674 ret
= _nfs4_proc_open(opendata
);
677 newstate
= nfs4_opendata_to_nfs4_state(opendata
);
678 if (IS_ERR(newstate
))
679 return PTR_ERR(newstate
);
680 nfs4_close_state(&opendata
->path
, newstate
, fmode
);
685 static int nfs4_open_recover(struct nfs4_opendata
*opendata
, struct nfs4_state
*state
)
687 struct nfs4_state
*newstate
;
690 /* memory barrier prior to reading state->n_* */
691 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
693 if (state
->n_rdwr
!= 0) {
694 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
|FMODE_WRITE
, &newstate
);
697 if (newstate
!= state
)
700 if (state
->n_wronly
!= 0) {
701 ret
= nfs4_open_recover_helper(opendata
, FMODE_WRITE
, &newstate
);
704 if (newstate
!= state
)
707 if (state
->n_rdonly
!= 0) {
708 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
, &newstate
);
711 if (newstate
!= state
)
715 * We may have performed cached opens for all three recoveries.
716 * Check if we need to update the current stateid.
718 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0 &&
719 memcmp(state
->stateid
.data
, state
->open_stateid
.data
, sizeof(state
->stateid
.data
)) != 0) {
720 write_seqlock(&state
->seqlock
);
721 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0)
722 memcpy(state
->stateid
.data
, state
->open_stateid
.data
, sizeof(state
->stateid
.data
));
723 write_sequnlock(&state
->seqlock
);
730 * reclaim state on the server after a reboot.
732 static int _nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
734 struct nfs_delegation
*delegation
;
735 struct nfs4_opendata
*opendata
;
736 fmode_t delegation_type
= 0;
739 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
740 if (IS_ERR(opendata
))
741 return PTR_ERR(opendata
);
742 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_PREVIOUS
;
743 opendata
->o_arg
.fh
= NFS_FH(state
->inode
);
745 delegation
= rcu_dereference(NFS_I(state
->inode
)->delegation
);
746 if (delegation
!= NULL
&& test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
) != 0)
747 delegation_type
= delegation
->type
;
749 opendata
->o_arg
.u
.delegation_type
= delegation_type
;
750 status
= nfs4_open_recover(opendata
, state
);
751 nfs4_opendata_put(opendata
);
755 static int nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
757 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
758 struct nfs4_exception exception
= { };
761 err
= _nfs4_do_open_reclaim(ctx
, state
);
762 if (err
!= -NFS4ERR_DELAY
)
764 nfs4_handle_exception(server
, err
, &exception
);
765 } while (exception
.retry
);
769 static int nfs4_open_reclaim(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
771 struct nfs_open_context
*ctx
;
774 ctx
= nfs4_state_find_open_context(state
);
777 ret
= nfs4_do_open_reclaim(ctx
, state
);
778 put_nfs_open_context(ctx
);
782 static int _nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
784 struct nfs4_opendata
*opendata
;
787 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
788 if (IS_ERR(opendata
))
789 return PTR_ERR(opendata
);
790 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_DELEGATE_CUR
;
791 memcpy(opendata
->o_arg
.u
.delegation
.data
, stateid
->data
,
792 sizeof(opendata
->o_arg
.u
.delegation
.data
));
793 ret
= nfs4_open_recover(opendata
, state
);
794 nfs4_opendata_put(opendata
);
798 int nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
800 struct nfs4_exception exception
= { };
801 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
804 err
= _nfs4_open_delegation_recall(ctx
, state
, stateid
);
810 case -NFS4ERR_STALE_CLIENTID
:
811 case -NFS4ERR_STALE_STATEID
:
812 case -NFS4ERR_EXPIRED
:
813 /* Don't recall a delegation if it was lost */
814 nfs4_schedule_state_recovery(server
->nfs_client
);
818 * The show must go on: exit, but mark the
819 * stateid as needing recovery.
821 case -NFS4ERR_ADMIN_REVOKED
:
822 case -NFS4ERR_BAD_STATEID
:
823 nfs4_state_mark_reclaim_nograce(server
->nfs_client
, state
);
828 err
= nfs4_handle_exception(server
, err
, &exception
);
829 } while (exception
.retry
);
834 static void nfs4_open_confirm_done(struct rpc_task
*task
, void *calldata
)
836 struct nfs4_opendata
*data
= calldata
;
838 data
->rpc_status
= task
->tk_status
;
839 if (RPC_ASSASSINATED(task
))
841 if (data
->rpc_status
== 0) {
842 memcpy(data
->o_res
.stateid
.data
, data
->c_res
.stateid
.data
,
843 sizeof(data
->o_res
.stateid
.data
));
844 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
845 renew_lease(data
->o_res
.server
, data
->timestamp
);
850 static void nfs4_open_confirm_release(void *calldata
)
852 struct nfs4_opendata
*data
= calldata
;
853 struct nfs4_state
*state
= NULL
;
855 /* If this request hasn't been cancelled, do nothing */
856 if (data
->cancelled
== 0)
858 /* In case of error, no cleanup! */
861 state
= nfs4_opendata_to_nfs4_state(data
);
863 nfs4_close_state(&data
->path
, state
, data
->o_arg
.fmode
);
865 nfs4_opendata_put(data
);
868 static const struct rpc_call_ops nfs4_open_confirm_ops
= {
869 .rpc_call_done
= nfs4_open_confirm_done
,
870 .rpc_release
= nfs4_open_confirm_release
,
874 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
876 static int _nfs4_proc_open_confirm(struct nfs4_opendata
*data
)
878 struct nfs_server
*server
= NFS_SERVER(data
->dir
->d_inode
);
879 struct rpc_task
*task
;
880 struct rpc_message msg
= {
881 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_CONFIRM
],
882 .rpc_argp
= &data
->c_arg
,
883 .rpc_resp
= &data
->c_res
,
884 .rpc_cred
= data
->owner
->so_cred
,
886 struct rpc_task_setup task_setup_data
= {
887 .rpc_client
= server
->client
,
889 .callback_ops
= &nfs4_open_confirm_ops
,
890 .callback_data
= data
,
891 .workqueue
= nfsiod_workqueue
,
892 .flags
= RPC_TASK_ASYNC
,
896 kref_get(&data
->kref
);
898 data
->rpc_status
= 0;
899 data
->timestamp
= jiffies
;
900 task
= rpc_run_task(&task_setup_data
);
902 return PTR_ERR(task
);
903 status
= nfs4_wait_for_completion_rpc_task(task
);
908 status
= data
->rpc_status
;
913 static void nfs4_open_prepare(struct rpc_task
*task
, void *calldata
)
915 struct nfs4_opendata
*data
= calldata
;
916 struct nfs4_state_owner
*sp
= data
->owner
;
918 if (nfs_wait_on_sequence(data
->o_arg
.seqid
, task
) != 0)
921 * Check if we still need to send an OPEN call, or if we can use
922 * a delegation instead.
924 if (data
->state
!= NULL
) {
925 struct nfs_delegation
*delegation
;
927 if (can_open_cached(data
->state
, data
->o_arg
.fmode
, data
->o_arg
.open_flags
))
930 delegation
= rcu_dereference(NFS_I(data
->state
->inode
)->delegation
);
931 if (delegation
!= NULL
&&
932 test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
) == 0) {
938 /* Update sequence id. */
939 data
->o_arg
.id
= sp
->so_owner_id
.id
;
940 data
->o_arg
.clientid
= sp
->so_client
->cl_clientid
;
941 if (data
->o_arg
.claim
== NFS4_OPEN_CLAIM_PREVIOUS
) {
942 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_NOATTR
];
943 nfs_copy_fh(&data
->o_res
.fh
, data
->o_arg
.fh
);
945 data
->timestamp
= jiffies
;
946 rpc_call_start(task
);
949 task
->tk_action
= NULL
;
953 static void nfs4_open_done(struct rpc_task
*task
, void *calldata
)
955 struct nfs4_opendata
*data
= calldata
;
957 data
->rpc_status
= task
->tk_status
;
958 if (RPC_ASSASSINATED(task
))
960 if (task
->tk_status
== 0) {
961 switch (data
->o_res
.f_attr
->mode
& S_IFMT
) {
965 data
->rpc_status
= -ELOOP
;
968 data
->rpc_status
= -EISDIR
;
971 data
->rpc_status
= -ENOTDIR
;
973 renew_lease(data
->o_res
.server
, data
->timestamp
);
974 if (!(data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
))
975 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
980 static void nfs4_open_release(void *calldata
)
982 struct nfs4_opendata
*data
= calldata
;
983 struct nfs4_state
*state
= NULL
;
985 /* If this request hasn't been cancelled, do nothing */
986 if (data
->cancelled
== 0)
988 /* In case of error, no cleanup! */
989 if (data
->rpc_status
!= 0 || !data
->rpc_done
)
991 /* In case we need an open_confirm, no cleanup! */
992 if (data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
)
994 state
= nfs4_opendata_to_nfs4_state(data
);
996 nfs4_close_state(&data
->path
, state
, data
->o_arg
.fmode
);
998 nfs4_opendata_put(data
);
1001 static const struct rpc_call_ops nfs4_open_ops
= {
1002 .rpc_call_prepare
= nfs4_open_prepare
,
1003 .rpc_call_done
= nfs4_open_done
,
1004 .rpc_release
= nfs4_open_release
,
1008 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1010 static int _nfs4_proc_open(struct nfs4_opendata
*data
)
1012 struct inode
*dir
= data
->dir
->d_inode
;
1013 struct nfs_server
*server
= NFS_SERVER(dir
);
1014 struct nfs_openargs
*o_arg
= &data
->o_arg
;
1015 struct nfs_openres
*o_res
= &data
->o_res
;
1016 struct rpc_task
*task
;
1017 struct rpc_message msg
= {
1018 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN
],
1021 .rpc_cred
= data
->owner
->so_cred
,
1023 struct rpc_task_setup task_setup_data
= {
1024 .rpc_client
= server
->client
,
1025 .rpc_message
= &msg
,
1026 .callback_ops
= &nfs4_open_ops
,
1027 .callback_data
= data
,
1028 .workqueue
= nfsiod_workqueue
,
1029 .flags
= RPC_TASK_ASYNC
,
1033 kref_get(&data
->kref
);
1035 data
->rpc_status
= 0;
1036 data
->cancelled
= 0;
1037 task
= rpc_run_task(&task_setup_data
);
1039 return PTR_ERR(task
);
1040 status
= nfs4_wait_for_completion_rpc_task(task
);
1042 data
->cancelled
= 1;
1045 status
= data
->rpc_status
;
1047 if (status
!= 0 || !data
->rpc_done
)
1050 if (o_res
->fh
.size
== 0)
1051 _nfs4_proc_lookup(dir
, o_arg
->name
, &o_res
->fh
, o_res
->f_attr
);
1053 if (o_arg
->open_flags
& O_CREAT
) {
1054 update_changeattr(dir
, &o_res
->cinfo
);
1055 nfs_post_op_update_inode(dir
, o_res
->dir_attr
);
1057 nfs_refresh_inode(dir
, o_res
->dir_attr
);
1058 if(o_res
->rflags
& NFS4_OPEN_RESULT_CONFIRM
) {
1059 status
= _nfs4_proc_open_confirm(data
);
1063 if (!(o_res
->f_attr
->valid
& NFS_ATTR_FATTR
))
1064 _nfs4_proc_getattr(server
, &o_res
->fh
, o_res
->f_attr
);
1068 static int nfs4_recover_expired_lease(struct nfs_server
*server
)
1070 struct nfs_client
*clp
= server
->nfs_client
;
1074 ret
= nfs4_wait_clnt_recover(clp
);
1077 if (!test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) &&
1078 !test_bit(NFS4CLNT_CHECK_LEASE
,&clp
->cl_state
))
1080 nfs4_schedule_state_recovery(clp
);
1087 * reclaim state on the server after a network partition.
1088 * Assumes caller holds the appropriate lock
1090 static int _nfs4_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1092 struct nfs4_opendata
*opendata
;
1095 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
1096 if (IS_ERR(opendata
))
1097 return PTR_ERR(opendata
);
1098 ret
= nfs4_open_recover(opendata
, state
);
1100 d_drop(ctx
->path
.dentry
);
1101 nfs4_opendata_put(opendata
);
1105 static inline int nfs4_do_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1107 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1108 struct nfs4_exception exception
= { };
1112 err
= _nfs4_open_expired(ctx
, state
);
1113 if (err
!= -NFS4ERR_DELAY
)
1115 nfs4_handle_exception(server
, err
, &exception
);
1116 } while (exception
.retry
);
1120 static int nfs4_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
1122 struct nfs_open_context
*ctx
;
1125 ctx
= nfs4_state_find_open_context(state
);
1127 return PTR_ERR(ctx
);
1128 ret
= nfs4_do_open_expired(ctx
, state
);
1129 put_nfs_open_context(ctx
);
1134 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1135 * fields corresponding to attributes that were used to store the verifier.
1136 * Make sure we clobber those fields in the later setattr call
1138 static inline void nfs4_exclusive_attrset(struct nfs4_opendata
*opendata
, struct iattr
*sattr
)
1140 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_ACCESS
) &&
1141 !(sattr
->ia_valid
& ATTR_ATIME_SET
))
1142 sattr
->ia_valid
|= ATTR_ATIME
;
1144 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_MODIFY
) &&
1145 !(sattr
->ia_valid
& ATTR_MTIME_SET
))
1146 sattr
->ia_valid
|= ATTR_MTIME
;
1150 * Returns a referenced nfs4_state
1152 static int _nfs4_do_open(struct inode
*dir
, struct path
*path
, fmode_t fmode
, int flags
, struct iattr
*sattr
, struct rpc_cred
*cred
, struct nfs4_state
**res
)
1154 struct nfs4_state_owner
*sp
;
1155 struct nfs4_state
*state
= NULL
;
1156 struct nfs_server
*server
= NFS_SERVER(dir
);
1157 struct nfs4_opendata
*opendata
;
1160 /* Protect against reboot recovery conflicts */
1162 if (!(sp
= nfs4_get_state_owner(server
, cred
))) {
1163 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1166 status
= nfs4_recover_expired_lease(server
);
1168 goto err_put_state_owner
;
1169 if (path
->dentry
->d_inode
!= NULL
)
1170 nfs4_return_incompatible_delegation(path
->dentry
->d_inode
, fmode
);
1172 opendata
= nfs4_opendata_alloc(path
, sp
, fmode
, flags
, sattr
);
1173 if (opendata
== NULL
)
1174 goto err_put_state_owner
;
1176 if (path
->dentry
->d_inode
!= NULL
)
1177 opendata
->state
= nfs4_get_open_state(path
->dentry
->d_inode
, sp
);
1179 status
= _nfs4_proc_open(opendata
);
1181 goto err_opendata_put
;
1183 if (opendata
->o_arg
.open_flags
& O_EXCL
)
1184 nfs4_exclusive_attrset(opendata
, sattr
);
1186 state
= nfs4_opendata_to_nfs4_state(opendata
);
1187 status
= PTR_ERR(state
);
1189 goto err_opendata_put
;
1190 nfs4_opendata_put(opendata
);
1191 nfs4_put_state_owner(sp
);
1195 nfs4_opendata_put(opendata
);
1196 err_put_state_owner
:
1197 nfs4_put_state_owner(sp
);
1204 static struct nfs4_state
*nfs4_do_open(struct inode
*dir
, struct path
*path
, fmode_t fmode
, int flags
, struct iattr
*sattr
, struct rpc_cred
*cred
)
1206 struct nfs4_exception exception
= { };
1207 struct nfs4_state
*res
;
1211 status
= _nfs4_do_open(dir
, path
, fmode
, flags
, sattr
, cred
, &res
);
1214 /* NOTE: BAD_SEQID means the server and client disagree about the
1215 * book-keeping w.r.t. state-changing operations
1216 * (OPEN/CLOSE/LOCK/LOCKU...)
1217 * It is actually a sign of a bug on the client or on the server.
1219 * If we receive a BAD_SEQID error in the particular case of
1220 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1221 * have unhashed the old state_owner for us, and that we can
1222 * therefore safely retry using a new one. We should still warn
1223 * the user though...
1225 if (status
== -NFS4ERR_BAD_SEQID
) {
1226 printk(KERN_WARNING
"NFS: v4 server %s "
1227 " returned a bad sequence-id error!\n",
1228 NFS_SERVER(dir
)->nfs_client
->cl_hostname
);
1229 exception
.retry
= 1;
1233 * BAD_STATEID on OPEN means that the server cancelled our
1234 * state before it received the OPEN_CONFIRM.
1235 * Recover by retrying the request as per the discussion
1236 * on Page 181 of RFC3530.
1238 if (status
== -NFS4ERR_BAD_STATEID
) {
1239 exception
.retry
= 1;
1242 if (status
== -EAGAIN
) {
1243 /* We must have found a delegation */
1244 exception
.retry
= 1;
1247 res
= ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir
),
1248 status
, &exception
));
1249 } while (exception
.retry
);
1253 static int _nfs4_do_setattr(struct inode
*inode
, struct rpc_cred
*cred
,
1254 struct nfs_fattr
*fattr
, struct iattr
*sattr
,
1255 struct nfs4_state
*state
)
1257 struct nfs_server
*server
= NFS_SERVER(inode
);
1258 struct nfs_setattrargs arg
= {
1259 .fh
= NFS_FH(inode
),
1262 .bitmask
= server
->attr_bitmask
,
1264 struct nfs_setattrres res
= {
1268 struct rpc_message msg
= {
1269 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETATTR
],
1274 unsigned long timestamp
= jiffies
;
1277 nfs_fattr_init(fattr
);
1279 if (nfs4_copy_delegation_stateid(&arg
.stateid
, inode
)) {
1280 /* Use that stateid */
1281 } else if (state
!= NULL
) {
1282 nfs4_copy_stateid(&arg
.stateid
, state
, current
->files
);
1284 memcpy(&arg
.stateid
, &zero_stateid
, sizeof(arg
.stateid
));
1286 status
= rpc_call_sync(server
->client
, &msg
, 0);
1287 if (status
== 0 && state
!= NULL
)
1288 renew_lease(server
, timestamp
);
1292 static int nfs4_do_setattr(struct inode
*inode
, struct rpc_cred
*cred
,
1293 struct nfs_fattr
*fattr
, struct iattr
*sattr
,
1294 struct nfs4_state
*state
)
1296 struct nfs_server
*server
= NFS_SERVER(inode
);
1297 struct nfs4_exception exception
= { };
1300 err
= nfs4_handle_exception(server
,
1301 _nfs4_do_setattr(inode
, cred
, fattr
, sattr
, state
),
1303 } while (exception
.retry
);
1307 struct nfs4_closedata
{
1309 struct inode
*inode
;
1310 struct nfs4_state
*state
;
1311 struct nfs_closeargs arg
;
1312 struct nfs_closeres res
;
1313 struct nfs_fattr fattr
;
1314 unsigned long timestamp
;
1317 static void nfs4_free_closedata(void *data
)
1319 struct nfs4_closedata
*calldata
= data
;
1320 struct nfs4_state_owner
*sp
= calldata
->state
->owner
;
1322 nfs4_put_open_state(calldata
->state
);
1323 nfs_free_seqid(calldata
->arg
.seqid
);
1324 nfs4_put_state_owner(sp
);
1325 path_put(&calldata
->path
);
1329 static void nfs4_close_done(struct rpc_task
*task
, void *data
)
1331 struct nfs4_closedata
*calldata
= data
;
1332 struct nfs4_state
*state
= calldata
->state
;
1333 struct nfs_server
*server
= NFS_SERVER(calldata
->inode
);
1335 if (RPC_ASSASSINATED(task
))
1337 /* hmm. we are done with the inode, and in the process of freeing
1338 * the state_owner. we keep this around to process errors
1340 switch (task
->tk_status
) {
1342 nfs_set_open_stateid(state
, &calldata
->res
.stateid
, 0);
1343 renew_lease(server
, calldata
->timestamp
);
1345 case -NFS4ERR_STALE_STATEID
:
1346 case -NFS4ERR_OLD_STATEID
:
1347 case -NFS4ERR_BAD_STATEID
:
1348 case -NFS4ERR_EXPIRED
:
1349 if (calldata
->arg
.fmode
== 0)
1352 if (nfs4_async_handle_error(task
, server
, state
) == -EAGAIN
) {
1353 rpc_restart_call(task
);
1357 nfs_refresh_inode(calldata
->inode
, calldata
->res
.fattr
);
1360 static void nfs4_close_prepare(struct rpc_task
*task
, void *data
)
1362 struct nfs4_closedata
*calldata
= data
;
1363 struct nfs4_state
*state
= calldata
->state
;
1364 int clear_rd
, clear_wr
, clear_rdwr
;
1366 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
1369 clear_rd
= clear_wr
= clear_rdwr
= 0;
1370 spin_lock(&state
->owner
->so_lock
);
1371 /* Calculate the change in open mode */
1372 if (state
->n_rdwr
== 0) {
1373 if (state
->n_rdonly
== 0) {
1374 clear_rd
|= test_and_clear_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
1375 clear_rdwr
|= test_and_clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1377 if (state
->n_wronly
== 0) {
1378 clear_wr
|= test_and_clear_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
1379 clear_rdwr
|= test_and_clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1382 spin_unlock(&state
->owner
->so_lock
);
1383 if (!clear_rd
&& !clear_wr
&& !clear_rdwr
) {
1384 /* Note: exit _without_ calling nfs4_close_done */
1385 task
->tk_action
= NULL
;
1388 nfs_fattr_init(calldata
->res
.fattr
);
1389 if (test_bit(NFS_O_RDONLY_STATE
, &state
->flags
) != 0) {
1390 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_DOWNGRADE
];
1391 calldata
->arg
.fmode
= FMODE_READ
;
1392 } else if (test_bit(NFS_O_WRONLY_STATE
, &state
->flags
) != 0) {
1393 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_DOWNGRADE
];
1394 calldata
->arg
.fmode
= FMODE_WRITE
;
1396 calldata
->timestamp
= jiffies
;
1397 rpc_call_start(task
);
1400 static const struct rpc_call_ops nfs4_close_ops
= {
1401 .rpc_call_prepare
= nfs4_close_prepare
,
1402 .rpc_call_done
= nfs4_close_done
,
1403 .rpc_release
= nfs4_free_closedata
,
1407 * It is possible for data to be read/written from a mem-mapped file
1408 * after the sys_close call (which hits the vfs layer as a flush).
1409 * This means that we can't safely call nfsv4 close on a file until
1410 * the inode is cleared. This in turn means that we are not good
1411 * NFSv4 citizens - we do not indicate to the server to update the file's
1412 * share state even when we are done with one of the three share
1413 * stateid's in the inode.
1415 * NOTE: Caller must be holding the sp->so_owner semaphore!
1417 int nfs4_do_close(struct path
*path
, struct nfs4_state
*state
, int wait
)
1419 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1420 struct nfs4_closedata
*calldata
;
1421 struct nfs4_state_owner
*sp
= state
->owner
;
1422 struct rpc_task
*task
;
1423 struct rpc_message msg
= {
1424 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CLOSE
],
1425 .rpc_cred
= state
->owner
->so_cred
,
1427 struct rpc_task_setup task_setup_data
= {
1428 .rpc_client
= server
->client
,
1429 .rpc_message
= &msg
,
1430 .callback_ops
= &nfs4_close_ops
,
1431 .workqueue
= nfsiod_workqueue
,
1432 .flags
= RPC_TASK_ASYNC
,
1434 int status
= -ENOMEM
;
1436 calldata
= kmalloc(sizeof(*calldata
), GFP_KERNEL
);
1437 if (calldata
== NULL
)
1439 calldata
->inode
= state
->inode
;
1440 calldata
->state
= state
;
1441 calldata
->arg
.fh
= NFS_FH(state
->inode
);
1442 calldata
->arg
.stateid
= &state
->open_stateid
;
1443 /* Serialization for the sequence id */
1444 calldata
->arg
.seqid
= nfs_alloc_seqid(&state
->owner
->so_seqid
);
1445 if (calldata
->arg
.seqid
== NULL
)
1446 goto out_free_calldata
;
1447 calldata
->arg
.fmode
= 0;
1448 calldata
->arg
.bitmask
= server
->cache_consistency_bitmask
;
1449 calldata
->res
.fattr
= &calldata
->fattr
;
1450 calldata
->res
.seqid
= calldata
->arg
.seqid
;
1451 calldata
->res
.server
= server
;
1452 calldata
->path
.mnt
= mntget(path
->mnt
);
1453 calldata
->path
.dentry
= dget(path
->dentry
);
1455 msg
.rpc_argp
= &calldata
->arg
,
1456 msg
.rpc_resp
= &calldata
->res
,
1457 task_setup_data
.callback_data
= calldata
;
1458 task
= rpc_run_task(&task_setup_data
);
1460 return PTR_ERR(task
);
1463 status
= rpc_wait_for_completion_task(task
);
1469 nfs4_put_open_state(state
);
1470 nfs4_put_state_owner(sp
);
1474 static int nfs4_intent_set_file(struct nameidata
*nd
, struct path
*path
, struct nfs4_state
*state
, fmode_t fmode
)
1479 /* If the open_intent is for execute, we have an extra check to make */
1480 if (fmode
& FMODE_EXEC
) {
1481 ret
= nfs_may_open(state
->inode
,
1482 state
->owner
->so_cred
,
1483 nd
->intent
.open
.flags
);
1487 filp
= lookup_instantiate_filp(nd
, path
->dentry
, NULL
);
1488 if (!IS_ERR(filp
)) {
1489 struct nfs_open_context
*ctx
;
1490 ctx
= nfs_file_open_context(filp
);
1494 ret
= PTR_ERR(filp
);
1496 nfs4_close_sync(path
, state
, fmode
& (FMODE_READ
|FMODE_WRITE
));
1501 nfs4_atomic_open(struct inode
*dir
, struct dentry
*dentry
, struct nameidata
*nd
)
1503 struct path path
= {
1504 .mnt
= nd
->path
.mnt
,
1507 struct dentry
*parent
;
1509 struct rpc_cred
*cred
;
1510 struct nfs4_state
*state
;
1512 fmode_t fmode
= nd
->intent
.open
.flags
& (FMODE_READ
| FMODE_WRITE
| FMODE_EXEC
);
1514 if (nd
->flags
& LOOKUP_CREATE
) {
1515 attr
.ia_mode
= nd
->intent
.open
.create_mode
;
1516 attr
.ia_valid
= ATTR_MODE
;
1517 if (!IS_POSIXACL(dir
))
1518 attr
.ia_mode
&= ~current_umask();
1521 BUG_ON(nd
->intent
.open
.flags
& O_CREAT
);
1524 cred
= rpc_lookup_cred();
1526 return (struct dentry
*)cred
;
1527 parent
= dentry
->d_parent
;
1528 /* Protect against concurrent sillydeletes */
1529 nfs_block_sillyrename(parent
);
1530 state
= nfs4_do_open(dir
, &path
, fmode
, nd
->intent
.open
.flags
, &attr
, cred
);
1532 if (IS_ERR(state
)) {
1533 if (PTR_ERR(state
) == -ENOENT
) {
1534 d_add(dentry
, NULL
);
1535 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
1537 nfs_unblock_sillyrename(parent
);
1538 return (struct dentry
*)state
;
1540 res
= d_add_unique(dentry
, igrab(state
->inode
));
1543 nfs_set_verifier(path
.dentry
, nfs_save_change_attribute(dir
));
1544 nfs_unblock_sillyrename(parent
);
1545 nfs4_intent_set_file(nd
, &path
, state
, fmode
);
1550 nfs4_open_revalidate(struct inode
*dir
, struct dentry
*dentry
, int openflags
, struct nameidata
*nd
)
1552 struct path path
= {
1553 .mnt
= nd
->path
.mnt
,
1556 struct rpc_cred
*cred
;
1557 struct nfs4_state
*state
;
1558 fmode_t fmode
= openflags
& (FMODE_READ
| FMODE_WRITE
);
1560 cred
= rpc_lookup_cred();
1562 return PTR_ERR(cred
);
1563 state
= nfs4_do_open(dir
, &path
, fmode
, openflags
, NULL
, cred
);
1565 if (IS_ERR(state
)) {
1566 switch (PTR_ERR(state
)) {
1572 lookup_instantiate_filp(nd
, (struct dentry
*)state
, NULL
);
1578 if (state
->inode
== dentry
->d_inode
) {
1579 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
1580 nfs4_intent_set_file(nd
, &path
, state
, fmode
);
1583 nfs4_close_sync(&path
, state
, fmode
);
1589 void nfs4_close_context(struct nfs_open_context
*ctx
, int is_sync
)
1591 if (ctx
->state
== NULL
)
1594 nfs4_close_sync(&ctx
->path
, ctx
->state
, ctx
->mode
);
1596 nfs4_close_state(&ctx
->path
, ctx
->state
, ctx
->mode
);
1599 static int _nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1601 struct nfs4_server_caps_res res
= {};
1602 struct rpc_message msg
= {
1603 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SERVER_CAPS
],
1604 .rpc_argp
= fhandle
,
1609 status
= rpc_call_sync(server
->client
, &msg
, 0);
1611 memcpy(server
->attr_bitmask
, res
.attr_bitmask
, sizeof(server
->attr_bitmask
));
1612 if (res
.attr_bitmask
[0] & FATTR4_WORD0_ACL
)
1613 server
->caps
|= NFS_CAP_ACLS
;
1614 if (res
.has_links
!= 0)
1615 server
->caps
|= NFS_CAP_HARDLINKS
;
1616 if (res
.has_symlinks
!= 0)
1617 server
->caps
|= NFS_CAP_SYMLINKS
;
1618 memcpy(server
->cache_consistency_bitmask
, res
.attr_bitmask
, sizeof(server
->cache_consistency_bitmask
));
1619 server
->cache_consistency_bitmask
[0] &= FATTR4_WORD0_CHANGE
|FATTR4_WORD0_SIZE
;
1620 server
->cache_consistency_bitmask
[1] &= FATTR4_WORD1_TIME_METADATA
|FATTR4_WORD1_TIME_MODIFY
;
1621 server
->acl_bitmask
= res
.acl_bitmask
;
1626 int nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1628 struct nfs4_exception exception
= { };
1631 err
= nfs4_handle_exception(server
,
1632 _nfs4_server_capabilities(server
, fhandle
),
1634 } while (exception
.retry
);
1638 static int _nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1639 struct nfs_fsinfo
*info
)
1641 struct nfs4_lookup_root_arg args
= {
1642 .bitmask
= nfs4_fattr_bitmap
,
1644 struct nfs4_lookup_res res
= {
1646 .fattr
= info
->fattr
,
1649 struct rpc_message msg
= {
1650 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP_ROOT
],
1654 nfs_fattr_init(info
->fattr
);
1655 return rpc_call_sync(server
->client
, &msg
, 0);
1658 static int nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1659 struct nfs_fsinfo
*info
)
1661 struct nfs4_exception exception
= { };
1664 err
= nfs4_handle_exception(server
,
1665 _nfs4_lookup_root(server
, fhandle
, info
),
1667 } while (exception
.retry
);
1672 * get the file handle for the "/" directory on the server
1674 static int nfs4_proc_get_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1675 struct nfs_fsinfo
*info
)
1679 status
= nfs4_lookup_root(server
, fhandle
, info
);
1681 status
= nfs4_server_capabilities(server
, fhandle
);
1683 status
= nfs4_do_fsinfo(server
, fhandle
, info
);
1684 return nfs4_map_errors(status
);
1688 * Get locations and (maybe) other attributes of a referral.
1689 * Note that we'll actually follow the referral later when
1690 * we detect fsid mismatch in inode revalidation
1692 static int nfs4_get_referral(struct inode
*dir
, const struct qstr
*name
, struct nfs_fattr
*fattr
, struct nfs_fh
*fhandle
)
1694 int status
= -ENOMEM
;
1695 struct page
*page
= NULL
;
1696 struct nfs4_fs_locations
*locations
= NULL
;
1698 page
= alloc_page(GFP_KERNEL
);
1701 locations
= kmalloc(sizeof(struct nfs4_fs_locations
), GFP_KERNEL
);
1702 if (locations
== NULL
)
1705 status
= nfs4_proc_fs_locations(dir
, name
, locations
, page
);
1708 /* Make sure server returned a different fsid for the referral */
1709 if (nfs_fsid_equal(&NFS_SERVER(dir
)->fsid
, &locations
->fattr
.fsid
)) {
1710 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__
, name
->name
);
1715 memcpy(fattr
, &locations
->fattr
, sizeof(struct nfs_fattr
));
1716 fattr
->valid
|= NFS_ATTR_FATTR_V4_REFERRAL
;
1718 fattr
->mode
= S_IFDIR
;
1719 memset(fhandle
, 0, sizeof(struct nfs_fh
));
1728 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1730 struct nfs4_getattr_arg args
= {
1732 .bitmask
= server
->attr_bitmask
,
1734 struct nfs4_getattr_res res
= {
1738 struct rpc_message msg
= {
1739 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETATTR
],
1744 nfs_fattr_init(fattr
);
1745 return rpc_call_sync(server
->client
, &msg
, 0);
1748 static int nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1750 struct nfs4_exception exception
= { };
1753 err
= nfs4_handle_exception(server
,
1754 _nfs4_proc_getattr(server
, fhandle
, fattr
),
1756 } while (exception
.retry
);
1761 * The file is not closed if it is opened due to the a request to change
1762 * the size of the file. The open call will not be needed once the
1763 * VFS layer lookup-intents are implemented.
1765 * Close is called when the inode is destroyed.
1766 * If we haven't opened the file for O_WRONLY, we
1767 * need to in the size_change case to obtain a stateid.
1770 * Because OPEN is always done by name in nfsv4, it is
1771 * possible that we opened a different file by the same
1772 * name. We can recognize this race condition, but we
1773 * can't do anything about it besides returning an error.
1775 * This will be fixed with VFS changes (lookup-intent).
1778 nfs4_proc_setattr(struct dentry
*dentry
, struct nfs_fattr
*fattr
,
1779 struct iattr
*sattr
)
1781 struct inode
*inode
= dentry
->d_inode
;
1782 struct rpc_cred
*cred
= NULL
;
1783 struct nfs4_state
*state
= NULL
;
1786 nfs_fattr_init(fattr
);
1788 /* Search for an existing open(O_WRITE) file */
1789 if (sattr
->ia_valid
& ATTR_FILE
) {
1790 struct nfs_open_context
*ctx
;
1792 ctx
= nfs_file_open_context(sattr
->ia_file
);
1799 status
= nfs4_do_setattr(inode
, cred
, fattr
, sattr
, state
);
1801 nfs_setattr_update_inode(inode
, sattr
);
1805 static int _nfs4_proc_lookupfh(struct nfs_server
*server
, const struct nfs_fh
*dirfh
,
1806 const struct qstr
*name
, struct nfs_fh
*fhandle
,
1807 struct nfs_fattr
*fattr
)
1810 struct nfs4_lookup_arg args
= {
1811 .bitmask
= server
->attr_bitmask
,
1815 struct nfs4_lookup_res res
= {
1820 struct rpc_message msg
= {
1821 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP
],
1826 nfs_fattr_init(fattr
);
1828 dprintk("NFS call lookupfh %s\n", name
->name
);
1829 status
= rpc_call_sync(server
->client
, &msg
, 0);
1830 dprintk("NFS reply lookupfh: %d\n", status
);
1834 static int nfs4_proc_lookupfh(struct nfs_server
*server
, struct nfs_fh
*dirfh
,
1835 struct qstr
*name
, struct nfs_fh
*fhandle
,
1836 struct nfs_fattr
*fattr
)
1838 struct nfs4_exception exception
= { };
1841 err
= _nfs4_proc_lookupfh(server
, dirfh
, name
, fhandle
, fattr
);
1843 if (err
== -NFS4ERR_MOVED
) {
1847 err
= nfs4_handle_exception(server
, err
, &exception
);
1848 } while (exception
.retry
);
1852 static int _nfs4_proc_lookup(struct inode
*dir
, const struct qstr
*name
,
1853 struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1857 dprintk("NFS call lookup %s\n", name
->name
);
1858 status
= _nfs4_proc_lookupfh(NFS_SERVER(dir
), NFS_FH(dir
), name
, fhandle
, fattr
);
1859 if (status
== -NFS4ERR_MOVED
)
1860 status
= nfs4_get_referral(dir
, name
, fattr
, fhandle
);
1861 dprintk("NFS reply lookup: %d\n", status
);
1865 static int nfs4_proc_lookup(struct inode
*dir
, struct qstr
*name
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1867 struct nfs4_exception exception
= { };
1870 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1871 _nfs4_proc_lookup(dir
, name
, fhandle
, fattr
),
1873 } while (exception
.retry
);
1877 static int _nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
1879 struct nfs_server
*server
= NFS_SERVER(inode
);
1880 struct nfs_fattr fattr
;
1881 struct nfs4_accessargs args
= {
1882 .fh
= NFS_FH(inode
),
1883 .bitmask
= server
->attr_bitmask
,
1885 struct nfs4_accessres res
= {
1889 struct rpc_message msg
= {
1890 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_ACCESS
],
1893 .rpc_cred
= entry
->cred
,
1895 int mode
= entry
->mask
;
1899 * Determine which access bits we want to ask for...
1901 if (mode
& MAY_READ
)
1902 args
.access
|= NFS4_ACCESS_READ
;
1903 if (S_ISDIR(inode
->i_mode
)) {
1904 if (mode
& MAY_WRITE
)
1905 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
;
1906 if (mode
& MAY_EXEC
)
1907 args
.access
|= NFS4_ACCESS_LOOKUP
;
1909 if (mode
& MAY_WRITE
)
1910 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
;
1911 if (mode
& MAY_EXEC
)
1912 args
.access
|= NFS4_ACCESS_EXECUTE
;
1914 nfs_fattr_init(&fattr
);
1915 status
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
1918 if (res
.access
& NFS4_ACCESS_READ
)
1919 entry
->mask
|= MAY_READ
;
1920 if (res
.access
& (NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
))
1921 entry
->mask
|= MAY_WRITE
;
1922 if (res
.access
& (NFS4_ACCESS_LOOKUP
|NFS4_ACCESS_EXECUTE
))
1923 entry
->mask
|= MAY_EXEC
;
1924 nfs_refresh_inode(inode
, &fattr
);
1929 static int nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
1931 struct nfs4_exception exception
= { };
1934 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1935 _nfs4_proc_access(inode
, entry
),
1937 } while (exception
.retry
);
1942 * TODO: For the time being, we don't try to get any attributes
1943 * along with any of the zero-copy operations READ, READDIR,
1946 * In the case of the first three, we want to put the GETATTR
1947 * after the read-type operation -- this is because it is hard
1948 * to predict the length of a GETATTR response in v4, and thus
1949 * align the READ data correctly. This means that the GETATTR
1950 * may end up partially falling into the page cache, and we should
1951 * shift it into the 'tail' of the xdr_buf before processing.
1952 * To do this efficiently, we need to know the total length
1953 * of data received, which doesn't seem to be available outside
1956 * In the case of WRITE, we also want to put the GETATTR after
1957 * the operation -- in this case because we want to make sure
1958 * we get the post-operation mtime and size. This means that
1959 * we can't use xdr_encode_pages() as written: we need a variant
1960 * of it which would leave room in the 'tail' iovec.
1962 * Both of these changes to the XDR layer would in fact be quite
1963 * minor, but I decided to leave them for a subsequent patch.
1965 static int _nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
1966 unsigned int pgbase
, unsigned int pglen
)
1968 struct nfs4_readlink args
= {
1969 .fh
= NFS_FH(inode
),
1974 struct rpc_message msg
= {
1975 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READLINK
],
1980 return rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
1983 static int nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
1984 unsigned int pgbase
, unsigned int pglen
)
1986 struct nfs4_exception exception
= { };
1989 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1990 _nfs4_proc_readlink(inode
, page
, pgbase
, pglen
),
1992 } while (exception
.retry
);
1998 * We will need to arrange for the VFS layer to provide an atomic open.
1999 * Until then, this create/open method is prone to inefficiency and race
2000 * conditions due to the lookup, create, and open VFS calls from sys_open()
2001 * placed on the wire.
2003 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2004 * The file will be opened again in the subsequent VFS open call
2005 * (nfs4_proc_file_open).
2007 * The open for read will just hang around to be used by any process that
2008 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2012 nfs4_proc_create(struct inode
*dir
, struct dentry
*dentry
, struct iattr
*sattr
,
2013 int flags
, struct nameidata
*nd
)
2015 struct path path
= {
2016 .mnt
= nd
->path
.mnt
,
2019 struct nfs4_state
*state
;
2020 struct rpc_cred
*cred
;
2021 fmode_t fmode
= flags
& (FMODE_READ
| FMODE_WRITE
);
2024 cred
= rpc_lookup_cred();
2026 status
= PTR_ERR(cred
);
2029 state
= nfs4_do_open(dir
, &path
, fmode
, flags
, sattr
, cred
);
2031 if (IS_ERR(state
)) {
2032 status
= PTR_ERR(state
);
2035 d_add(dentry
, igrab(state
->inode
));
2036 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
2037 if (flags
& O_EXCL
) {
2038 struct nfs_fattr fattr
;
2039 status
= nfs4_do_setattr(state
->inode
, cred
, &fattr
, sattr
, state
);
2041 nfs_setattr_update_inode(state
->inode
, sattr
);
2042 nfs_post_op_update_inode(state
->inode
, &fattr
);
2044 if (status
== 0 && (nd
->flags
& LOOKUP_OPEN
) != 0)
2045 status
= nfs4_intent_set_file(nd
, &path
, state
, fmode
);
2047 nfs4_close_sync(&path
, state
, fmode
);
2054 static int _nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
2056 struct nfs_server
*server
= NFS_SERVER(dir
);
2057 struct nfs_removeargs args
= {
2059 .name
.len
= name
->len
,
2060 .name
.name
= name
->name
,
2061 .bitmask
= server
->attr_bitmask
,
2063 struct nfs_removeres res
= {
2066 struct rpc_message msg
= {
2067 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
],
2073 nfs_fattr_init(&res
.dir_attr
);
2074 status
= rpc_call_sync(server
->client
, &msg
, 0);
2076 update_changeattr(dir
, &res
.cinfo
);
2077 nfs_post_op_update_inode(dir
, &res
.dir_attr
);
2082 static int nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
2084 struct nfs4_exception exception
= { };
2087 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2088 _nfs4_proc_remove(dir
, name
),
2090 } while (exception
.retry
);
2094 static void nfs4_proc_unlink_setup(struct rpc_message
*msg
, struct inode
*dir
)
2096 struct nfs_server
*server
= NFS_SERVER(dir
);
2097 struct nfs_removeargs
*args
= msg
->rpc_argp
;
2098 struct nfs_removeres
*res
= msg
->rpc_resp
;
2100 args
->bitmask
= server
->cache_consistency_bitmask
;
2101 res
->server
= server
;
2102 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
];
2105 static int nfs4_proc_unlink_done(struct rpc_task
*task
, struct inode
*dir
)
2107 struct nfs_removeres
*res
= task
->tk_msg
.rpc_resp
;
2109 if (nfs4_async_handle_error(task
, res
->server
, NULL
) == -EAGAIN
)
2111 update_changeattr(dir
, &res
->cinfo
);
2112 nfs_post_op_update_inode(dir
, &res
->dir_attr
);
2116 static int _nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2117 struct inode
*new_dir
, struct qstr
*new_name
)
2119 struct nfs_server
*server
= NFS_SERVER(old_dir
);
2120 struct nfs4_rename_arg arg
= {
2121 .old_dir
= NFS_FH(old_dir
),
2122 .new_dir
= NFS_FH(new_dir
),
2123 .old_name
= old_name
,
2124 .new_name
= new_name
,
2125 .bitmask
= server
->attr_bitmask
,
2127 struct nfs_fattr old_fattr
, new_fattr
;
2128 struct nfs4_rename_res res
= {
2130 .old_fattr
= &old_fattr
,
2131 .new_fattr
= &new_fattr
,
2133 struct rpc_message msg
= {
2134 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENAME
],
2140 nfs_fattr_init(res
.old_fattr
);
2141 nfs_fattr_init(res
.new_fattr
);
2142 status
= rpc_call_sync(server
->client
, &msg
, 0);
2145 update_changeattr(old_dir
, &res
.old_cinfo
);
2146 nfs_post_op_update_inode(old_dir
, res
.old_fattr
);
2147 update_changeattr(new_dir
, &res
.new_cinfo
);
2148 nfs_post_op_update_inode(new_dir
, res
.new_fattr
);
2153 static int nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2154 struct inode
*new_dir
, struct qstr
*new_name
)
2156 struct nfs4_exception exception
= { };
2159 err
= nfs4_handle_exception(NFS_SERVER(old_dir
),
2160 _nfs4_proc_rename(old_dir
, old_name
,
2163 } while (exception
.retry
);
2167 static int _nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2169 struct nfs_server
*server
= NFS_SERVER(inode
);
2170 struct nfs4_link_arg arg
= {
2171 .fh
= NFS_FH(inode
),
2172 .dir_fh
= NFS_FH(dir
),
2174 .bitmask
= server
->attr_bitmask
,
2176 struct nfs_fattr fattr
, dir_attr
;
2177 struct nfs4_link_res res
= {
2180 .dir_attr
= &dir_attr
,
2182 struct rpc_message msg
= {
2183 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LINK
],
2189 nfs_fattr_init(res
.fattr
);
2190 nfs_fattr_init(res
.dir_attr
);
2191 status
= rpc_call_sync(server
->client
, &msg
, 0);
2193 update_changeattr(dir
, &res
.cinfo
);
2194 nfs_post_op_update_inode(dir
, res
.dir_attr
);
2195 nfs_post_op_update_inode(inode
, res
.fattr
);
2201 static int nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2203 struct nfs4_exception exception
= { };
2206 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2207 _nfs4_proc_link(inode
, dir
, name
),
2209 } while (exception
.retry
);
2213 struct nfs4_createdata
{
2214 struct rpc_message msg
;
2215 struct nfs4_create_arg arg
;
2216 struct nfs4_create_res res
;
2218 struct nfs_fattr fattr
;
2219 struct nfs_fattr dir_fattr
;
2222 static struct nfs4_createdata
*nfs4_alloc_createdata(struct inode
*dir
,
2223 struct qstr
*name
, struct iattr
*sattr
, u32 ftype
)
2225 struct nfs4_createdata
*data
;
2227 data
= kzalloc(sizeof(*data
), GFP_KERNEL
);
2229 struct nfs_server
*server
= NFS_SERVER(dir
);
2231 data
->msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
];
2232 data
->msg
.rpc_argp
= &data
->arg
;
2233 data
->msg
.rpc_resp
= &data
->res
;
2234 data
->arg
.dir_fh
= NFS_FH(dir
);
2235 data
->arg
.server
= server
;
2236 data
->arg
.name
= name
;
2237 data
->arg
.attrs
= sattr
;
2238 data
->arg
.ftype
= ftype
;
2239 data
->arg
.bitmask
= server
->attr_bitmask
;
2240 data
->res
.server
= server
;
2241 data
->res
.fh
= &data
->fh
;
2242 data
->res
.fattr
= &data
->fattr
;
2243 data
->res
.dir_fattr
= &data
->dir_fattr
;
2244 nfs_fattr_init(data
->res
.fattr
);
2245 nfs_fattr_init(data
->res
.dir_fattr
);
2250 static int nfs4_do_create(struct inode
*dir
, struct dentry
*dentry
, struct nfs4_createdata
*data
)
2252 int status
= rpc_call_sync(NFS_CLIENT(dir
), &data
->msg
, 0);
2254 update_changeattr(dir
, &data
->res
.dir_cinfo
);
2255 nfs_post_op_update_inode(dir
, data
->res
.dir_fattr
);
2256 status
= nfs_instantiate(dentry
, data
->res
.fh
, data
->res
.fattr
);
2261 static void nfs4_free_createdata(struct nfs4_createdata
*data
)
2266 static int _nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2267 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2269 struct nfs4_createdata
*data
;
2270 int status
= -ENAMETOOLONG
;
2272 if (len
> NFS4_MAXPATHLEN
)
2276 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4LNK
);
2280 data
->msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SYMLINK
];
2281 data
->arg
.u
.symlink
.pages
= &page
;
2282 data
->arg
.u
.symlink
.len
= len
;
2284 status
= nfs4_do_create(dir
, dentry
, data
);
2286 nfs4_free_createdata(data
);
2291 static int nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2292 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2294 struct nfs4_exception exception
= { };
2297 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2298 _nfs4_proc_symlink(dir
, dentry
, page
,
2301 } while (exception
.retry
);
2305 static int _nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2306 struct iattr
*sattr
)
2308 struct nfs4_createdata
*data
;
2309 int status
= -ENOMEM
;
2311 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4DIR
);
2315 status
= nfs4_do_create(dir
, dentry
, data
);
2317 nfs4_free_createdata(data
);
2322 static int nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2323 struct iattr
*sattr
)
2325 struct nfs4_exception exception
= { };
2328 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2329 _nfs4_proc_mkdir(dir
, dentry
, sattr
),
2331 } while (exception
.retry
);
2335 static int _nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2336 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2338 struct inode
*dir
= dentry
->d_inode
;
2339 struct nfs4_readdir_arg args
= {
2344 .bitmask
= NFS_SERVER(dentry
->d_inode
)->cache_consistency_bitmask
,
2346 struct nfs4_readdir_res res
;
2347 struct rpc_message msg
= {
2348 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READDIR
],
2355 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__
,
2356 dentry
->d_parent
->d_name
.name
,
2357 dentry
->d_name
.name
,
2358 (unsigned long long)cookie
);
2359 nfs4_setup_readdir(cookie
, NFS_COOKIEVERF(dir
), dentry
, &args
);
2360 res
.pgbase
= args
.pgbase
;
2361 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
2363 memcpy(NFS_COOKIEVERF(dir
), res
.verifier
.data
, NFS4_VERIFIER_SIZE
);
2365 nfs_invalidate_atime(dir
);
2367 dprintk("%s: returns %d\n", __func__
, status
);
2371 static int nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2372 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2374 struct nfs4_exception exception
= { };
2377 err
= nfs4_handle_exception(NFS_SERVER(dentry
->d_inode
),
2378 _nfs4_proc_readdir(dentry
, cred
, cookie
,
2381 } while (exception
.retry
);
2385 static int _nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2386 struct iattr
*sattr
, dev_t rdev
)
2388 struct nfs4_createdata
*data
;
2389 int mode
= sattr
->ia_mode
;
2390 int status
= -ENOMEM
;
2392 BUG_ON(!(sattr
->ia_valid
& ATTR_MODE
));
2393 BUG_ON(!S_ISFIFO(mode
) && !S_ISBLK(mode
) && !S_ISCHR(mode
) && !S_ISSOCK(mode
));
2395 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4SOCK
);
2400 data
->arg
.ftype
= NF4FIFO
;
2401 else if (S_ISBLK(mode
)) {
2402 data
->arg
.ftype
= NF4BLK
;
2403 data
->arg
.u
.device
.specdata1
= MAJOR(rdev
);
2404 data
->arg
.u
.device
.specdata2
= MINOR(rdev
);
2406 else if (S_ISCHR(mode
)) {
2407 data
->arg
.ftype
= NF4CHR
;
2408 data
->arg
.u
.device
.specdata1
= MAJOR(rdev
);
2409 data
->arg
.u
.device
.specdata2
= MINOR(rdev
);
2412 status
= nfs4_do_create(dir
, dentry
, data
);
2414 nfs4_free_createdata(data
);
2419 static int nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2420 struct iattr
*sattr
, dev_t rdev
)
2422 struct nfs4_exception exception
= { };
2425 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2426 _nfs4_proc_mknod(dir
, dentry
, sattr
, rdev
),
2428 } while (exception
.retry
);
2432 static int _nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2433 struct nfs_fsstat
*fsstat
)
2435 struct nfs4_statfs_arg args
= {
2437 .bitmask
= server
->attr_bitmask
,
2439 struct rpc_message msg
= {
2440 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_STATFS
],
2445 nfs_fattr_init(fsstat
->fattr
);
2446 return rpc_call_sync(server
->client
, &msg
, 0);
2449 static int nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsstat
*fsstat
)
2451 struct nfs4_exception exception
= { };
2454 err
= nfs4_handle_exception(server
,
2455 _nfs4_proc_statfs(server
, fhandle
, fsstat
),
2457 } while (exception
.retry
);
2461 static int _nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2462 struct nfs_fsinfo
*fsinfo
)
2464 struct nfs4_fsinfo_arg args
= {
2466 .bitmask
= server
->attr_bitmask
,
2468 struct rpc_message msg
= {
2469 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FSINFO
],
2474 return rpc_call_sync(server
->client
, &msg
, 0);
2477 static int nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2479 struct nfs4_exception exception
= { };
2483 err
= nfs4_handle_exception(server
,
2484 _nfs4_do_fsinfo(server
, fhandle
, fsinfo
),
2486 } while (exception
.retry
);
2490 static int nfs4_proc_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2492 nfs_fattr_init(fsinfo
->fattr
);
2493 return nfs4_do_fsinfo(server
, fhandle
, fsinfo
);
2496 static int _nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2497 struct nfs_pathconf
*pathconf
)
2499 struct nfs4_pathconf_arg args
= {
2501 .bitmask
= server
->attr_bitmask
,
2503 struct rpc_message msg
= {
2504 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_PATHCONF
],
2506 .rpc_resp
= pathconf
,
2509 /* None of the pathconf attributes are mandatory to implement */
2510 if ((args
.bitmask
[0] & nfs4_pathconf_bitmap
[0]) == 0) {
2511 memset(pathconf
, 0, sizeof(*pathconf
));
2515 nfs_fattr_init(pathconf
->fattr
);
2516 return rpc_call_sync(server
->client
, &msg
, 0);
2519 static int nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2520 struct nfs_pathconf
*pathconf
)
2522 struct nfs4_exception exception
= { };
2526 err
= nfs4_handle_exception(server
,
2527 _nfs4_proc_pathconf(server
, fhandle
, pathconf
),
2529 } while (exception
.retry
);
2533 static int nfs4_read_done(struct rpc_task
*task
, struct nfs_read_data
*data
)
2535 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2537 if (nfs4_async_handle_error(task
, server
, data
->args
.context
->state
) == -EAGAIN
) {
2538 rpc_restart_call(task
);
2542 nfs_invalidate_atime(data
->inode
);
2543 if (task
->tk_status
> 0)
2544 renew_lease(server
, data
->timestamp
);
2548 static void nfs4_proc_read_setup(struct nfs_read_data
*data
, struct rpc_message
*msg
)
2550 data
->timestamp
= jiffies
;
2551 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READ
];
2554 static int nfs4_write_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
2556 struct inode
*inode
= data
->inode
;
2558 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
), data
->args
.context
->state
) == -EAGAIN
) {
2559 rpc_restart_call(task
);
2562 if (task
->tk_status
>= 0) {
2563 renew_lease(NFS_SERVER(inode
), data
->timestamp
);
2564 nfs_post_op_update_inode_force_wcc(inode
, data
->res
.fattr
);
2569 static void nfs4_proc_write_setup(struct nfs_write_data
*data
, struct rpc_message
*msg
)
2571 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2573 data
->args
.bitmask
= server
->cache_consistency_bitmask
;
2574 data
->res
.server
= server
;
2575 data
->timestamp
= jiffies
;
2577 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_WRITE
];
2580 static int nfs4_commit_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
2582 struct inode
*inode
= data
->inode
;
2584 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
), NULL
) == -EAGAIN
) {
2585 rpc_restart_call(task
);
2588 nfs_refresh_inode(inode
, data
->res
.fattr
);
2592 static void nfs4_proc_commit_setup(struct nfs_write_data
*data
, struct rpc_message
*msg
)
2594 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2596 data
->args
.bitmask
= server
->cache_consistency_bitmask
;
2597 data
->res
.server
= server
;
2598 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_COMMIT
];
2602 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2603 * standalone procedure for queueing an asynchronous RENEW.
2605 static void nfs4_renew_done(struct rpc_task
*task
, void *data
)
2607 struct nfs_client
*clp
= (struct nfs_client
*)task
->tk_msg
.rpc_argp
;
2608 unsigned long timestamp
= (unsigned long)data
;
2610 if (task
->tk_status
< 0) {
2611 /* Unless we're shutting down, schedule state recovery! */
2612 if (test_bit(NFS_CS_RENEWD
, &clp
->cl_res_state
) != 0)
2613 nfs4_schedule_state_recovery(clp
);
2616 spin_lock(&clp
->cl_lock
);
2617 if (time_before(clp
->cl_last_renewal
,timestamp
))
2618 clp
->cl_last_renewal
= timestamp
;
2619 spin_unlock(&clp
->cl_lock
);
2622 static const struct rpc_call_ops nfs4_renew_ops
= {
2623 .rpc_call_done
= nfs4_renew_done
,
2626 int nfs4_proc_async_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2628 struct rpc_message msg
= {
2629 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2634 return rpc_call_async(clp
->cl_rpcclient
, &msg
, RPC_TASK_SOFT
,
2635 &nfs4_renew_ops
, (void *)jiffies
);
2638 int nfs4_proc_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2640 struct rpc_message msg
= {
2641 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2645 unsigned long now
= jiffies
;
2648 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2651 spin_lock(&clp
->cl_lock
);
2652 if (time_before(clp
->cl_last_renewal
,now
))
2653 clp
->cl_last_renewal
= now
;
2654 spin_unlock(&clp
->cl_lock
);
2658 static inline int nfs4_server_supports_acls(struct nfs_server
*server
)
2660 return (server
->caps
& NFS_CAP_ACLS
)
2661 && (server
->acl_bitmask
& ACL4_SUPPORT_ALLOW_ACL
)
2662 && (server
->acl_bitmask
& ACL4_SUPPORT_DENY_ACL
);
2665 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2666 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2669 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2671 static void buf_to_pages(const void *buf
, size_t buflen
,
2672 struct page
**pages
, unsigned int *pgbase
)
2674 const void *p
= buf
;
2676 *pgbase
= offset_in_page(buf
);
2678 while (p
< buf
+ buflen
) {
2679 *(pages
++) = virt_to_page(p
);
2680 p
+= PAGE_CACHE_SIZE
;
2684 struct nfs4_cached_acl
{
2690 static void nfs4_set_cached_acl(struct inode
*inode
, struct nfs4_cached_acl
*acl
)
2692 struct nfs_inode
*nfsi
= NFS_I(inode
);
2694 spin_lock(&inode
->i_lock
);
2695 kfree(nfsi
->nfs4_acl
);
2696 nfsi
->nfs4_acl
= acl
;
2697 spin_unlock(&inode
->i_lock
);
2700 static void nfs4_zap_acl_attr(struct inode
*inode
)
2702 nfs4_set_cached_acl(inode
, NULL
);
2705 static inline ssize_t
nfs4_read_cached_acl(struct inode
*inode
, char *buf
, size_t buflen
)
2707 struct nfs_inode
*nfsi
= NFS_I(inode
);
2708 struct nfs4_cached_acl
*acl
;
2711 spin_lock(&inode
->i_lock
);
2712 acl
= nfsi
->nfs4_acl
;
2715 if (buf
== NULL
) /* user is just asking for length */
2717 if (acl
->cached
== 0)
2719 ret
= -ERANGE
; /* see getxattr(2) man page */
2720 if (acl
->len
> buflen
)
2722 memcpy(buf
, acl
->data
, acl
->len
);
2726 spin_unlock(&inode
->i_lock
);
2730 static void nfs4_write_cached_acl(struct inode
*inode
, const char *buf
, size_t acl_len
)
2732 struct nfs4_cached_acl
*acl
;
2734 if (buf
&& acl_len
<= PAGE_SIZE
) {
2735 acl
= kmalloc(sizeof(*acl
) + acl_len
, GFP_KERNEL
);
2739 memcpy(acl
->data
, buf
, acl_len
);
2741 acl
= kmalloc(sizeof(*acl
), GFP_KERNEL
);
2748 nfs4_set_cached_acl(inode
, acl
);
2751 static ssize_t
__nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
2753 struct page
*pages
[NFS4ACL_MAXPAGES
];
2754 struct nfs_getaclargs args
= {
2755 .fh
= NFS_FH(inode
),
2759 size_t resp_len
= buflen
;
2761 struct rpc_message msg
= {
2762 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETACL
],
2764 .rpc_resp
= &resp_len
,
2766 struct page
*localpage
= NULL
;
2769 if (buflen
< PAGE_SIZE
) {
2770 /* As long as we're doing a round trip to the server anyway,
2771 * let's be prepared for a page of acl data. */
2772 localpage
= alloc_page(GFP_KERNEL
);
2773 resp_buf
= page_address(localpage
);
2774 if (localpage
== NULL
)
2776 args
.acl_pages
[0] = localpage
;
2777 args
.acl_pgbase
= 0;
2778 resp_len
= args
.acl_len
= PAGE_SIZE
;
2781 buf_to_pages(buf
, buflen
, args
.acl_pages
, &args
.acl_pgbase
);
2783 ret
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
2786 if (resp_len
> args
.acl_len
)
2787 nfs4_write_cached_acl(inode
, NULL
, resp_len
);
2789 nfs4_write_cached_acl(inode
, resp_buf
, resp_len
);
2792 if (resp_len
> buflen
)
2795 memcpy(buf
, resp_buf
, resp_len
);
2800 __free_page(localpage
);
2804 static ssize_t
nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
2806 struct nfs4_exception exception
= { };
2809 ret
= __nfs4_get_acl_uncached(inode
, buf
, buflen
);
2812 ret
= nfs4_handle_exception(NFS_SERVER(inode
), ret
, &exception
);
2813 } while (exception
.retry
);
2817 static ssize_t
nfs4_proc_get_acl(struct inode
*inode
, void *buf
, size_t buflen
)
2819 struct nfs_server
*server
= NFS_SERVER(inode
);
2822 if (!nfs4_server_supports_acls(server
))
2824 ret
= nfs_revalidate_inode(server
, inode
);
2827 if (NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ACL
)
2828 nfs_zap_acl_cache(inode
);
2829 ret
= nfs4_read_cached_acl(inode
, buf
, buflen
);
2832 return nfs4_get_acl_uncached(inode
, buf
, buflen
);
2835 static int __nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
2837 struct nfs_server
*server
= NFS_SERVER(inode
);
2838 struct page
*pages
[NFS4ACL_MAXPAGES
];
2839 struct nfs_setaclargs arg
= {
2840 .fh
= NFS_FH(inode
),
2844 struct rpc_message msg
= {
2845 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETACL
],
2851 if (!nfs4_server_supports_acls(server
))
2853 nfs_inode_return_delegation(inode
);
2854 buf_to_pages(buf
, buflen
, arg
.acl_pages
, &arg
.acl_pgbase
);
2855 ret
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
2856 nfs_access_zap_cache(inode
);
2857 nfs_zap_acl_cache(inode
);
2861 static int nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
2863 struct nfs4_exception exception
= { };
2866 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2867 __nfs4_proc_set_acl(inode
, buf
, buflen
),
2869 } while (exception
.retry
);
2874 nfs4_async_handle_error(struct rpc_task
*task
, const struct nfs_server
*server
, struct nfs4_state
*state
)
2876 struct nfs_client
*clp
= server
->nfs_client
;
2878 if (!clp
|| task
->tk_status
>= 0)
2880 switch(task
->tk_status
) {
2881 case -NFS4ERR_ADMIN_REVOKED
:
2882 case -NFS4ERR_BAD_STATEID
:
2883 case -NFS4ERR_OPENMODE
:
2886 nfs4_state_mark_reclaim_nograce(clp
, state
);
2887 case -NFS4ERR_STALE_CLIENTID
:
2888 case -NFS4ERR_STALE_STATEID
:
2889 case -NFS4ERR_EXPIRED
:
2890 rpc_sleep_on(&clp
->cl_rpcwaitq
, task
, NULL
);
2891 nfs4_schedule_state_recovery(clp
);
2892 if (test_bit(NFS4CLNT_MANAGER_RUNNING
, &clp
->cl_state
) == 0)
2893 rpc_wake_up_queued_task(&clp
->cl_rpcwaitq
, task
);
2894 task
->tk_status
= 0;
2896 case -NFS4ERR_DELAY
:
2897 nfs_inc_server_stats(server
, NFSIOS_DELAY
);
2898 case -NFS4ERR_GRACE
:
2899 rpc_delay(task
, NFS4_POLL_RETRY_MAX
);
2900 task
->tk_status
= 0;
2902 case -NFS4ERR_OLD_STATEID
:
2903 task
->tk_status
= 0;
2906 task
->tk_status
= nfs4_map_errors(task
->tk_status
);
2910 int nfs4_proc_setclientid(struct nfs_client
*clp
, u32 program
, unsigned short port
, struct rpc_cred
*cred
)
2912 nfs4_verifier sc_verifier
;
2913 struct nfs4_setclientid setclientid
= {
2914 .sc_verifier
= &sc_verifier
,
2917 struct rpc_message msg
= {
2918 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID
],
2919 .rpc_argp
= &setclientid
,
2927 p
= (__be32
*)sc_verifier
.data
;
2928 *p
++ = htonl((u32
)clp
->cl_boot_time
.tv_sec
);
2929 *p
= htonl((u32
)clp
->cl_boot_time
.tv_nsec
);
2932 setclientid
.sc_name_len
= scnprintf(setclientid
.sc_name
,
2933 sizeof(setclientid
.sc_name
), "%s/%s %s %s %u",
2935 rpc_peeraddr2str(clp
->cl_rpcclient
,
2937 rpc_peeraddr2str(clp
->cl_rpcclient
,
2939 clp
->cl_rpcclient
->cl_auth
->au_ops
->au_name
,
2940 clp
->cl_id_uniquifier
);
2941 setclientid
.sc_netid_len
= scnprintf(setclientid
.sc_netid
,
2942 sizeof(setclientid
.sc_netid
),
2943 rpc_peeraddr2str(clp
->cl_rpcclient
,
2944 RPC_DISPLAY_NETID
));
2945 setclientid
.sc_uaddr_len
= scnprintf(setclientid
.sc_uaddr
,
2946 sizeof(setclientid
.sc_uaddr
), "%s.%u.%u",
2947 clp
->cl_ipaddr
, port
>> 8, port
& 255);
2949 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2950 if (status
!= -NFS4ERR_CLID_INUSE
)
2955 ssleep(clp
->cl_lease_time
+ 1);
2957 if (++clp
->cl_id_uniquifier
== 0)
2963 static int _nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2965 struct nfs_fsinfo fsinfo
;
2966 struct rpc_message msg
= {
2967 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID_CONFIRM
],
2969 .rpc_resp
= &fsinfo
,
2976 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2978 spin_lock(&clp
->cl_lock
);
2979 clp
->cl_lease_time
= fsinfo
.lease_time
* HZ
;
2980 clp
->cl_last_renewal
= now
;
2981 spin_unlock(&clp
->cl_lock
);
2986 int nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2991 err
= _nfs4_proc_setclientid_confirm(clp
, cred
);
2995 case -NFS4ERR_RESOURCE
:
2996 /* The IBM lawyers misread another document! */
2997 case -NFS4ERR_DELAY
:
2998 err
= nfs4_delay(clp
->cl_rpcclient
, &timeout
);
3004 struct nfs4_delegreturndata
{
3005 struct nfs4_delegreturnargs args
;
3006 struct nfs4_delegreturnres res
;
3008 nfs4_stateid stateid
;
3009 unsigned long timestamp
;
3010 struct nfs_fattr fattr
;
3014 static void nfs4_delegreturn_done(struct rpc_task
*task
, void *calldata
)
3016 struct nfs4_delegreturndata
*data
= calldata
;
3017 data
->rpc_status
= task
->tk_status
;
3018 if (data
->rpc_status
== 0)
3019 renew_lease(data
->res
.server
, data
->timestamp
);
3022 static void nfs4_delegreturn_release(void *calldata
)
3027 static const struct rpc_call_ops nfs4_delegreturn_ops
= {
3028 .rpc_call_done
= nfs4_delegreturn_done
,
3029 .rpc_release
= nfs4_delegreturn_release
,
3032 static int _nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
, int issync
)
3034 struct nfs4_delegreturndata
*data
;
3035 struct nfs_server
*server
= NFS_SERVER(inode
);
3036 struct rpc_task
*task
;
3037 struct rpc_message msg
= {
3038 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DELEGRETURN
],
3041 struct rpc_task_setup task_setup_data
= {
3042 .rpc_client
= server
->client
,
3043 .rpc_message
= &msg
,
3044 .callback_ops
= &nfs4_delegreturn_ops
,
3045 .flags
= RPC_TASK_ASYNC
,
3049 data
= kmalloc(sizeof(*data
), GFP_KERNEL
);
3052 data
->args
.fhandle
= &data
->fh
;
3053 data
->args
.stateid
= &data
->stateid
;
3054 data
->args
.bitmask
= server
->attr_bitmask
;
3055 nfs_copy_fh(&data
->fh
, NFS_FH(inode
));
3056 memcpy(&data
->stateid
, stateid
, sizeof(data
->stateid
));
3057 data
->res
.fattr
= &data
->fattr
;
3058 data
->res
.server
= server
;
3059 nfs_fattr_init(data
->res
.fattr
);
3060 data
->timestamp
= jiffies
;
3061 data
->rpc_status
= 0;
3063 task_setup_data
.callback_data
= data
;
3064 msg
.rpc_argp
= &data
->args
,
3065 msg
.rpc_resp
= &data
->res
,
3066 task
= rpc_run_task(&task_setup_data
);
3068 return PTR_ERR(task
);
3071 status
= nfs4_wait_for_completion_rpc_task(task
);
3074 status
= data
->rpc_status
;
3077 nfs_refresh_inode(inode
, &data
->fattr
);
3083 int nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
, int issync
)
3085 struct nfs_server
*server
= NFS_SERVER(inode
);
3086 struct nfs4_exception exception
= { };
3089 err
= _nfs4_proc_delegreturn(inode
, cred
, stateid
, issync
);
3091 case -NFS4ERR_STALE_STATEID
:
3092 case -NFS4ERR_EXPIRED
:
3096 err
= nfs4_handle_exception(server
, err
, &exception
);
3097 } while (exception
.retry
);
3101 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3102 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3105 * sleep, with exponential backoff, and retry the LOCK operation.
3107 static unsigned long
3108 nfs4_set_lock_task_retry(unsigned long timeout
)
3110 schedule_timeout_killable(timeout
);
3112 if (timeout
> NFS4_LOCK_MAXTIMEOUT
)
3113 return NFS4_LOCK_MAXTIMEOUT
;
3117 static int _nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3119 struct inode
*inode
= state
->inode
;
3120 struct nfs_server
*server
= NFS_SERVER(inode
);
3121 struct nfs_client
*clp
= server
->nfs_client
;
3122 struct nfs_lockt_args arg
= {
3123 .fh
= NFS_FH(inode
),
3126 struct nfs_lockt_res res
= {
3129 struct rpc_message msg
= {
3130 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKT
],
3133 .rpc_cred
= state
->owner
->so_cred
,
3135 struct nfs4_lock_state
*lsp
;
3138 arg
.lock_owner
.clientid
= clp
->cl_clientid
;
3139 status
= nfs4_set_lock_state(state
, request
);
3142 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3143 arg
.lock_owner
.id
= lsp
->ls_id
.id
;
3144 status
= rpc_call_sync(server
->client
, &msg
, 0);
3147 request
->fl_type
= F_UNLCK
;
3149 case -NFS4ERR_DENIED
:
3152 request
->fl_ops
->fl_release_private(request
);
3157 static int nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3159 struct nfs4_exception exception
= { };
3163 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3164 _nfs4_proc_getlk(state
, cmd
, request
),
3166 } while (exception
.retry
);
3170 static int do_vfs_lock(struct file
*file
, struct file_lock
*fl
)
3173 switch (fl
->fl_flags
& (FL_POSIX
|FL_FLOCK
)) {
3175 res
= posix_lock_file_wait(file
, fl
);
3178 res
= flock_lock_file_wait(file
, fl
);
3186 struct nfs4_unlockdata
{
3187 struct nfs_locku_args arg
;
3188 struct nfs_locku_res res
;
3189 struct nfs4_lock_state
*lsp
;
3190 struct nfs_open_context
*ctx
;
3191 struct file_lock fl
;
3192 const struct nfs_server
*server
;
3193 unsigned long timestamp
;
3196 static struct nfs4_unlockdata
*nfs4_alloc_unlockdata(struct file_lock
*fl
,
3197 struct nfs_open_context
*ctx
,
3198 struct nfs4_lock_state
*lsp
,
3199 struct nfs_seqid
*seqid
)
3201 struct nfs4_unlockdata
*p
;
3202 struct inode
*inode
= lsp
->ls_state
->inode
;
3204 p
= kmalloc(sizeof(*p
), GFP_KERNEL
);
3207 p
->arg
.fh
= NFS_FH(inode
);
3209 p
->arg
.seqid
= seqid
;
3210 p
->res
.seqid
= seqid
;
3211 p
->arg
.stateid
= &lsp
->ls_stateid
;
3213 atomic_inc(&lsp
->ls_count
);
3214 /* Ensure we don't close file until we're done freeing locks! */
3215 p
->ctx
= get_nfs_open_context(ctx
);
3216 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3217 p
->server
= NFS_SERVER(inode
);
3221 static void nfs4_locku_release_calldata(void *data
)
3223 struct nfs4_unlockdata
*calldata
= data
;
3224 nfs_free_seqid(calldata
->arg
.seqid
);
3225 nfs4_put_lock_state(calldata
->lsp
);
3226 put_nfs_open_context(calldata
->ctx
);
3230 static void nfs4_locku_done(struct rpc_task
*task
, void *data
)
3232 struct nfs4_unlockdata
*calldata
= data
;
3234 if (RPC_ASSASSINATED(task
))
3236 switch (task
->tk_status
) {
3238 memcpy(calldata
->lsp
->ls_stateid
.data
,
3239 calldata
->res
.stateid
.data
,
3240 sizeof(calldata
->lsp
->ls_stateid
.data
));
3241 renew_lease(calldata
->server
, calldata
->timestamp
);
3243 case -NFS4ERR_BAD_STATEID
:
3244 case -NFS4ERR_OLD_STATEID
:
3245 case -NFS4ERR_STALE_STATEID
:
3246 case -NFS4ERR_EXPIRED
:
3249 if (nfs4_async_handle_error(task
, calldata
->server
, NULL
) == -EAGAIN
)
3250 rpc_restart_call(task
);
3254 static void nfs4_locku_prepare(struct rpc_task
*task
, void *data
)
3256 struct nfs4_unlockdata
*calldata
= data
;
3258 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
3260 if ((calldata
->lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) == 0) {
3261 /* Note: exit _without_ running nfs4_locku_done */
3262 task
->tk_action
= NULL
;
3265 calldata
->timestamp
= jiffies
;
3266 rpc_call_start(task
);
3269 static const struct rpc_call_ops nfs4_locku_ops
= {
3270 .rpc_call_prepare
= nfs4_locku_prepare
,
3271 .rpc_call_done
= nfs4_locku_done
,
3272 .rpc_release
= nfs4_locku_release_calldata
,
3275 static struct rpc_task
*nfs4_do_unlck(struct file_lock
*fl
,
3276 struct nfs_open_context
*ctx
,
3277 struct nfs4_lock_state
*lsp
,
3278 struct nfs_seqid
*seqid
)
3280 struct nfs4_unlockdata
*data
;
3281 struct rpc_message msg
= {
3282 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKU
],
3283 .rpc_cred
= ctx
->cred
,
3285 struct rpc_task_setup task_setup_data
= {
3286 .rpc_client
= NFS_CLIENT(lsp
->ls_state
->inode
),
3287 .rpc_message
= &msg
,
3288 .callback_ops
= &nfs4_locku_ops
,
3289 .workqueue
= nfsiod_workqueue
,
3290 .flags
= RPC_TASK_ASYNC
,
3293 /* Ensure this is an unlock - when canceling a lock, the
3294 * canceled lock is passed in, and it won't be an unlock.
3296 fl
->fl_type
= F_UNLCK
;
3298 data
= nfs4_alloc_unlockdata(fl
, ctx
, lsp
, seqid
);
3300 nfs_free_seqid(seqid
);
3301 return ERR_PTR(-ENOMEM
);
3304 msg
.rpc_argp
= &data
->arg
,
3305 msg
.rpc_resp
= &data
->res
,
3306 task_setup_data
.callback_data
= data
;
3307 return rpc_run_task(&task_setup_data
);
3310 static int nfs4_proc_unlck(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3312 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
3313 struct nfs_seqid
*seqid
;
3314 struct nfs4_lock_state
*lsp
;
3315 struct rpc_task
*task
;
3317 unsigned char fl_flags
= request
->fl_flags
;
3319 status
= nfs4_set_lock_state(state
, request
);
3320 /* Unlock _before_ we do the RPC call */
3321 request
->fl_flags
|= FL_EXISTS
;
3322 down_read(&nfsi
->rwsem
);
3323 if (do_vfs_lock(request
->fl_file
, request
) == -ENOENT
) {
3324 up_read(&nfsi
->rwsem
);
3327 up_read(&nfsi
->rwsem
);
3330 /* Is this a delegated lock? */
3331 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
3333 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3334 seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3338 task
= nfs4_do_unlck(request
, nfs_file_open_context(request
->fl_file
), lsp
, seqid
);
3339 status
= PTR_ERR(task
);
3342 status
= nfs4_wait_for_completion_rpc_task(task
);
3345 request
->fl_flags
= fl_flags
;
3349 struct nfs4_lockdata
{
3350 struct nfs_lock_args arg
;
3351 struct nfs_lock_res res
;
3352 struct nfs4_lock_state
*lsp
;
3353 struct nfs_open_context
*ctx
;
3354 struct file_lock fl
;
3355 unsigned long timestamp
;
3360 static struct nfs4_lockdata
*nfs4_alloc_lockdata(struct file_lock
*fl
,
3361 struct nfs_open_context
*ctx
, struct nfs4_lock_state
*lsp
)
3363 struct nfs4_lockdata
*p
;
3364 struct inode
*inode
= lsp
->ls_state
->inode
;
3365 struct nfs_server
*server
= NFS_SERVER(inode
);
3367 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
3371 p
->arg
.fh
= NFS_FH(inode
);
3373 p
->arg
.open_seqid
= nfs_alloc_seqid(&lsp
->ls_state
->owner
->so_seqid
);
3374 if (p
->arg
.open_seqid
== NULL
)
3376 p
->arg
.lock_seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3377 if (p
->arg
.lock_seqid
== NULL
)
3378 goto out_free_seqid
;
3379 p
->arg
.lock_stateid
= &lsp
->ls_stateid
;
3380 p
->arg
.lock_owner
.clientid
= server
->nfs_client
->cl_clientid
;
3381 p
->arg
.lock_owner
.id
= lsp
->ls_id
.id
;
3382 p
->res
.lock_seqid
= p
->arg
.lock_seqid
;
3384 atomic_inc(&lsp
->ls_count
);
3385 p
->ctx
= get_nfs_open_context(ctx
);
3386 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3389 nfs_free_seqid(p
->arg
.open_seqid
);
3395 static void nfs4_lock_prepare(struct rpc_task
*task
, void *calldata
)
3397 struct nfs4_lockdata
*data
= calldata
;
3398 struct nfs4_state
*state
= data
->lsp
->ls_state
;
3400 dprintk("%s: begin!\n", __func__
);
3401 if (nfs_wait_on_sequence(data
->arg
.lock_seqid
, task
) != 0)
3403 /* Do we need to do an open_to_lock_owner? */
3404 if (!(data
->arg
.lock_seqid
->sequence
->flags
& NFS_SEQID_CONFIRMED
)) {
3405 if (nfs_wait_on_sequence(data
->arg
.open_seqid
, task
) != 0)
3407 data
->arg
.open_stateid
= &state
->stateid
;
3408 data
->arg
.new_lock_owner
= 1;
3409 data
->res
.open_seqid
= data
->arg
.open_seqid
;
3411 data
->arg
.new_lock_owner
= 0;
3412 data
->timestamp
= jiffies
;
3413 rpc_call_start(task
);
3414 dprintk("%s: done!, ret = %d\n", __func__
, data
->rpc_status
);
3417 static void nfs4_lock_done(struct rpc_task
*task
, void *calldata
)
3419 struct nfs4_lockdata
*data
= calldata
;
3421 dprintk("%s: begin!\n", __func__
);
3423 data
->rpc_status
= task
->tk_status
;
3424 if (RPC_ASSASSINATED(task
))
3426 if (data
->arg
.new_lock_owner
!= 0) {
3427 if (data
->rpc_status
== 0)
3428 nfs_confirm_seqid(&data
->lsp
->ls_seqid
, 0);
3432 if (data
->rpc_status
== 0) {
3433 memcpy(data
->lsp
->ls_stateid
.data
, data
->res
.stateid
.data
,
3434 sizeof(data
->lsp
->ls_stateid
.data
));
3435 data
->lsp
->ls_flags
|= NFS_LOCK_INITIALIZED
;
3436 renew_lease(NFS_SERVER(data
->ctx
->path
.dentry
->d_inode
), data
->timestamp
);
3439 dprintk("%s: done, ret = %d!\n", __func__
, data
->rpc_status
);
3442 static void nfs4_lock_release(void *calldata
)
3444 struct nfs4_lockdata
*data
= calldata
;
3446 dprintk("%s: begin!\n", __func__
);
3447 nfs_free_seqid(data
->arg
.open_seqid
);
3448 if (data
->cancelled
!= 0) {
3449 struct rpc_task
*task
;
3450 task
= nfs4_do_unlck(&data
->fl
, data
->ctx
, data
->lsp
,
3451 data
->arg
.lock_seqid
);
3454 dprintk("%s: cancelling lock!\n", __func__
);
3456 nfs_free_seqid(data
->arg
.lock_seqid
);
3457 nfs4_put_lock_state(data
->lsp
);
3458 put_nfs_open_context(data
->ctx
);
3460 dprintk("%s: done!\n", __func__
);
3463 static const struct rpc_call_ops nfs4_lock_ops
= {
3464 .rpc_call_prepare
= nfs4_lock_prepare
,
3465 .rpc_call_done
= nfs4_lock_done
,
3466 .rpc_release
= nfs4_lock_release
,
3469 static int _nfs4_do_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*fl
, int reclaim
)
3471 struct nfs4_lockdata
*data
;
3472 struct rpc_task
*task
;
3473 struct rpc_message msg
= {
3474 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCK
],
3475 .rpc_cred
= state
->owner
->so_cred
,
3477 struct rpc_task_setup task_setup_data
= {
3478 .rpc_client
= NFS_CLIENT(state
->inode
),
3479 .rpc_message
= &msg
,
3480 .callback_ops
= &nfs4_lock_ops
,
3481 .workqueue
= nfsiod_workqueue
,
3482 .flags
= RPC_TASK_ASYNC
,
3486 dprintk("%s: begin!\n", __func__
);
3487 data
= nfs4_alloc_lockdata(fl
, nfs_file_open_context(fl
->fl_file
),
3488 fl
->fl_u
.nfs4_fl
.owner
);
3492 data
->arg
.block
= 1;
3494 data
->arg
.reclaim
= 1;
3495 msg
.rpc_argp
= &data
->arg
,
3496 msg
.rpc_resp
= &data
->res
,
3497 task_setup_data
.callback_data
= data
;
3498 task
= rpc_run_task(&task_setup_data
);
3500 return PTR_ERR(task
);
3501 ret
= nfs4_wait_for_completion_rpc_task(task
);
3503 ret
= data
->rpc_status
;
3505 data
->cancelled
= 1;
3507 dprintk("%s: done, ret = %d!\n", __func__
, ret
);
3511 static int nfs4_lock_reclaim(struct nfs4_state
*state
, struct file_lock
*request
)
3513 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3514 struct nfs4_exception exception
= { };
3518 /* Cache the lock if possible... */
3519 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
3521 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 1);
3522 if (err
!= -NFS4ERR_DELAY
)
3524 nfs4_handle_exception(server
, err
, &exception
);
3525 } while (exception
.retry
);
3529 static int nfs4_lock_expired(struct nfs4_state
*state
, struct file_lock
*request
)
3531 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3532 struct nfs4_exception exception
= { };
3535 err
= nfs4_set_lock_state(state
, request
);
3539 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
3541 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 0);
3542 if (err
!= -NFS4ERR_DELAY
)
3544 nfs4_handle_exception(server
, err
, &exception
);
3545 } while (exception
.retry
);
3549 static int _nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3551 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
3552 unsigned char fl_flags
= request
->fl_flags
;
3555 /* Is this a delegated open? */
3556 status
= nfs4_set_lock_state(state
, request
);
3559 request
->fl_flags
|= FL_ACCESS
;
3560 status
= do_vfs_lock(request
->fl_file
, request
);
3563 down_read(&nfsi
->rwsem
);
3564 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
)) {
3565 /* Yes: cache locks! */
3566 /* ...but avoid races with delegation recall... */
3567 request
->fl_flags
= fl_flags
& ~FL_SLEEP
;
3568 status
= do_vfs_lock(request
->fl_file
, request
);
3571 status
= _nfs4_do_setlk(state
, cmd
, request
, 0);
3574 /* Note: we always want to sleep here! */
3575 request
->fl_flags
= fl_flags
| FL_SLEEP
;
3576 if (do_vfs_lock(request
->fl_file
, request
) < 0)
3577 printk(KERN_WARNING
"%s: VFS is out of sync with lock manager!\n", __func__
);
3579 up_read(&nfsi
->rwsem
);
3581 request
->fl_flags
= fl_flags
;
3585 static int nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3587 struct nfs4_exception exception
= { };
3591 err
= _nfs4_proc_setlk(state
, cmd
, request
);
3592 if (err
== -NFS4ERR_DENIED
)
3594 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3596 } while (exception
.retry
);
3601 nfs4_proc_lock(struct file
*filp
, int cmd
, struct file_lock
*request
)
3603 struct nfs_open_context
*ctx
;
3604 struct nfs4_state
*state
;
3605 unsigned long timeout
= NFS4_LOCK_MINTIMEOUT
;
3608 /* verify open state */
3609 ctx
= nfs_file_open_context(filp
);
3612 if (request
->fl_start
< 0 || request
->fl_end
< 0)
3616 return nfs4_proc_getlk(state
, F_GETLK
, request
);
3618 if (!(IS_SETLK(cmd
) || IS_SETLKW(cmd
)))
3621 if (request
->fl_type
== F_UNLCK
)
3622 return nfs4_proc_unlck(state
, cmd
, request
);
3625 status
= nfs4_proc_setlk(state
, cmd
, request
);
3626 if ((status
!= -EAGAIN
) || IS_SETLK(cmd
))
3628 timeout
= nfs4_set_lock_task_retry(timeout
);
3629 status
= -ERESTARTSYS
;
3632 } while(status
< 0);
3636 int nfs4_lock_delegation_recall(struct nfs4_state
*state
, struct file_lock
*fl
)
3638 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3639 struct nfs4_exception exception
= { };
3642 err
= nfs4_set_lock_state(state
, fl
);
3646 err
= _nfs4_do_setlk(state
, F_SETLK
, fl
, 0);
3649 printk(KERN_ERR
"%s: unhandled error %d.\n",
3654 case -NFS4ERR_EXPIRED
:
3655 case -NFS4ERR_STALE_CLIENTID
:
3656 case -NFS4ERR_STALE_STATEID
:
3657 nfs4_schedule_state_recovery(server
->nfs_client
);
3661 * The show must go on: exit, but mark the
3662 * stateid as needing recovery.
3664 case -NFS4ERR_ADMIN_REVOKED
:
3665 case -NFS4ERR_BAD_STATEID
:
3666 case -NFS4ERR_OPENMODE
:
3667 nfs4_state_mark_reclaim_nograce(server
->nfs_client
, state
);
3671 case -NFS4ERR_DENIED
:
3672 /* kill_proc(fl->fl_pid, SIGLOST, 1); */
3675 case -NFS4ERR_DELAY
:
3678 err
= nfs4_handle_exception(server
, err
, &exception
);
3679 } while (exception
.retry
);
3684 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3686 int nfs4_setxattr(struct dentry
*dentry
, const char *key
, const void *buf
,
3687 size_t buflen
, int flags
)
3689 struct inode
*inode
= dentry
->d_inode
;
3691 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
3694 return nfs4_proc_set_acl(inode
, buf
, buflen
);
3697 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3698 * and that's what we'll do for e.g. user attributes that haven't been set.
3699 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3700 * attributes in kernel-managed attribute namespaces. */
3701 ssize_t
nfs4_getxattr(struct dentry
*dentry
, const char *key
, void *buf
,
3704 struct inode
*inode
= dentry
->d_inode
;
3706 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
3709 return nfs4_proc_get_acl(inode
, buf
, buflen
);
3712 ssize_t
nfs4_listxattr(struct dentry
*dentry
, char *buf
, size_t buflen
)
3714 size_t len
= strlen(XATTR_NAME_NFSV4_ACL
) + 1;
3716 if (!nfs4_server_supports_acls(NFS_SERVER(dentry
->d_inode
)))
3718 if (buf
&& buflen
< len
)
3721 memcpy(buf
, XATTR_NAME_NFSV4_ACL
, len
);
3725 static void nfs_fixup_referral_attributes(struct nfs_fattr
*fattr
)
3727 if (!((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) &&
3728 (fattr
->valid
& NFS_ATTR_FATTR_FSID
) &&
3729 (fattr
->valid
& NFS_ATTR_FATTR_V4_REFERRAL
)))
3732 fattr
->valid
|= NFS_ATTR_FATTR_TYPE
| NFS_ATTR_FATTR_MODE
|
3733 NFS_ATTR_FATTR_NLINK
;
3734 fattr
->mode
= S_IFDIR
| S_IRUGO
| S_IXUGO
;
3738 int nfs4_proc_fs_locations(struct inode
*dir
, const struct qstr
*name
,
3739 struct nfs4_fs_locations
*fs_locations
, struct page
*page
)
3741 struct nfs_server
*server
= NFS_SERVER(dir
);
3743 [0] = FATTR4_WORD0_FSID
| FATTR4_WORD0_FS_LOCATIONS
,
3744 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID
,
3746 struct nfs4_fs_locations_arg args
= {
3747 .dir_fh
= NFS_FH(dir
),
3752 struct rpc_message msg
= {
3753 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FS_LOCATIONS
],
3755 .rpc_resp
= fs_locations
,
3759 dprintk("%s: start\n", __func__
);
3760 nfs_fattr_init(&fs_locations
->fattr
);
3761 fs_locations
->server
= server
;
3762 fs_locations
->nlocations
= 0;
3763 status
= rpc_call_sync(server
->client
, &msg
, 0);
3764 nfs_fixup_referral_attributes(&fs_locations
->fattr
);
3765 dprintk("%s: returned status = %d\n", __func__
, status
);
3769 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops
= {
3770 .owner_flag_bit
= NFS_OWNER_RECLAIM_REBOOT
,
3771 .state_flag_bit
= NFS_STATE_RECLAIM_REBOOT
,
3772 .recover_open
= nfs4_open_reclaim
,
3773 .recover_lock
= nfs4_lock_reclaim
,
3776 struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops
= {
3777 .owner_flag_bit
= NFS_OWNER_RECLAIM_NOGRACE
,
3778 .state_flag_bit
= NFS_STATE_RECLAIM_NOGRACE
,
3779 .recover_open
= nfs4_open_expired
,
3780 .recover_lock
= nfs4_lock_expired
,
3783 static const struct inode_operations nfs4_file_inode_operations
= {
3784 .permission
= nfs_permission
,
3785 .getattr
= nfs_getattr
,
3786 .setattr
= nfs_setattr
,
3787 .getxattr
= nfs4_getxattr
,
3788 .setxattr
= nfs4_setxattr
,
3789 .listxattr
= nfs4_listxattr
,
3792 const struct nfs_rpc_ops nfs_v4_clientops
= {
3793 .version
= 4, /* protocol version */
3794 .dentry_ops
= &nfs4_dentry_operations
,
3795 .dir_inode_ops
= &nfs4_dir_inode_operations
,
3796 .file_inode_ops
= &nfs4_file_inode_operations
,
3797 .getroot
= nfs4_proc_get_root
,
3798 .getattr
= nfs4_proc_getattr
,
3799 .setattr
= nfs4_proc_setattr
,
3800 .lookupfh
= nfs4_proc_lookupfh
,
3801 .lookup
= nfs4_proc_lookup
,
3802 .access
= nfs4_proc_access
,
3803 .readlink
= nfs4_proc_readlink
,
3804 .create
= nfs4_proc_create
,
3805 .remove
= nfs4_proc_remove
,
3806 .unlink_setup
= nfs4_proc_unlink_setup
,
3807 .unlink_done
= nfs4_proc_unlink_done
,
3808 .rename
= nfs4_proc_rename
,
3809 .link
= nfs4_proc_link
,
3810 .symlink
= nfs4_proc_symlink
,
3811 .mkdir
= nfs4_proc_mkdir
,
3812 .rmdir
= nfs4_proc_remove
,
3813 .readdir
= nfs4_proc_readdir
,
3814 .mknod
= nfs4_proc_mknod
,
3815 .statfs
= nfs4_proc_statfs
,
3816 .fsinfo
= nfs4_proc_fsinfo
,
3817 .pathconf
= nfs4_proc_pathconf
,
3818 .set_capabilities
= nfs4_server_capabilities
,
3819 .decode_dirent
= nfs4_decode_dirent
,
3820 .read_setup
= nfs4_proc_read_setup
,
3821 .read_done
= nfs4_read_done
,
3822 .write_setup
= nfs4_proc_write_setup
,
3823 .write_done
= nfs4_write_done
,
3824 .commit_setup
= nfs4_proc_commit_setup
,
3825 .commit_done
= nfs4_commit_done
,
3826 .lock
= nfs4_proc_lock
,
3827 .clear_acl_cache
= nfs4_zap_acl_attr
,
3828 .close_context
= nfs4_close_context
,