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 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_bit_killable(void *word
)
198 if (fatal_signal_pending(current
))
204 static int nfs4_wait_clnt_recover(struct nfs_client
*clp
)
210 res
= wait_on_bit(&clp
->cl_state
, NFS4CLNT_MANAGER_RUNNING
,
211 nfs4_wait_bit_killable
, TASK_KILLABLE
);
215 static int nfs4_delay(struct rpc_clnt
*clnt
, long *timeout
)
222 *timeout
= NFS4_POLL_RETRY_MIN
;
223 if (*timeout
> NFS4_POLL_RETRY_MAX
)
224 *timeout
= NFS4_POLL_RETRY_MAX
;
225 schedule_timeout_killable(*timeout
);
226 if (fatal_signal_pending(current
))
232 /* This is the error handling routine for processes that are allowed
235 static int nfs4_handle_exception(const struct nfs_server
*server
, int errorcode
, struct nfs4_exception
*exception
)
237 struct nfs_client
*clp
= server
->nfs_client
;
238 struct nfs4_state
*state
= exception
->state
;
241 exception
->retry
= 0;
245 case -NFS4ERR_ADMIN_REVOKED
:
246 case -NFS4ERR_BAD_STATEID
:
247 case -NFS4ERR_OPENMODE
:
250 nfs4_state_mark_reclaim_nograce(clp
, state
);
251 case -NFS4ERR_STALE_CLIENTID
:
252 case -NFS4ERR_STALE_STATEID
:
253 case -NFS4ERR_EXPIRED
:
254 nfs4_schedule_state_recovery(clp
);
255 ret
= nfs4_wait_clnt_recover(clp
);
257 exception
->retry
= 1;
259 case -NFS4ERR_FILE_OPEN
:
262 ret
= nfs4_delay(server
->client
, &exception
->timeout
);
265 case -NFS4ERR_OLD_STATEID
:
266 exception
->retry
= 1;
268 /* We failed to handle the error */
269 return nfs4_map_errors(ret
);
273 static void renew_lease(const struct nfs_server
*server
, unsigned long timestamp
)
275 struct nfs_client
*clp
= server
->nfs_client
;
276 spin_lock(&clp
->cl_lock
);
277 if (time_before(clp
->cl_last_renewal
,timestamp
))
278 clp
->cl_last_renewal
= timestamp
;
279 spin_unlock(&clp
->cl_lock
);
282 static void update_changeattr(struct inode
*dir
, struct nfs4_change_info
*cinfo
)
284 struct nfs_inode
*nfsi
= NFS_I(dir
);
286 spin_lock(&dir
->i_lock
);
287 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
|NFS_INO_INVALID_DATA
;
288 if (!cinfo
->atomic
|| cinfo
->before
!= nfsi
->change_attr
)
289 nfs_force_lookup_revalidate(dir
);
290 nfsi
->change_attr
= cinfo
->after
;
291 spin_unlock(&dir
->i_lock
);
294 struct nfs4_opendata
{
296 struct nfs_openargs o_arg
;
297 struct nfs_openres o_res
;
298 struct nfs_open_confirmargs c_arg
;
299 struct nfs_open_confirmres c_res
;
300 struct nfs_fattr f_attr
;
301 struct nfs_fattr dir_attr
;
304 struct nfs4_state_owner
*owner
;
305 struct nfs4_state
*state
;
307 unsigned long timestamp
;
308 unsigned int rpc_done
: 1;
314 static void nfs4_init_opendata_res(struct nfs4_opendata
*p
)
316 p
->o_res
.f_attr
= &p
->f_attr
;
317 p
->o_res
.dir_attr
= &p
->dir_attr
;
318 p
->o_res
.seqid
= p
->o_arg
.seqid
;
319 p
->c_res
.seqid
= p
->c_arg
.seqid
;
320 p
->o_res
.server
= p
->o_arg
.server
;
321 nfs_fattr_init(&p
->f_attr
);
322 nfs_fattr_init(&p
->dir_attr
);
325 static struct nfs4_opendata
*nfs4_opendata_alloc(struct path
*path
,
326 struct nfs4_state_owner
*sp
, fmode_t fmode
, int flags
,
327 const struct iattr
*attrs
)
329 struct dentry
*parent
= dget_parent(path
->dentry
);
330 struct inode
*dir
= parent
->d_inode
;
331 struct nfs_server
*server
= NFS_SERVER(dir
);
332 struct nfs4_opendata
*p
;
334 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
337 p
->o_arg
.seqid
= nfs_alloc_seqid(&sp
->so_seqid
);
338 if (p
->o_arg
.seqid
== NULL
)
340 p
->path
.mnt
= mntget(path
->mnt
);
341 p
->path
.dentry
= dget(path
->dentry
);
344 atomic_inc(&sp
->so_count
);
345 p
->o_arg
.fh
= NFS_FH(dir
);
346 p
->o_arg
.open_flags
= flags
;
347 p
->o_arg
.fmode
= fmode
& (FMODE_READ
|FMODE_WRITE
);
348 p
->o_arg
.clientid
= server
->nfs_client
->cl_clientid
;
349 p
->o_arg
.id
= sp
->so_owner_id
.id
;
350 p
->o_arg
.name
= &p
->path
.dentry
->d_name
;
351 p
->o_arg
.server
= server
;
352 p
->o_arg
.bitmask
= server
->attr_bitmask
;
353 p
->o_arg
.claim
= NFS4_OPEN_CLAIM_NULL
;
354 if (flags
& O_EXCL
) {
355 u32
*s
= (u32
*) p
->o_arg
.u
.verifier
.data
;
358 } else if (flags
& O_CREAT
) {
359 p
->o_arg
.u
.attrs
= &p
->attrs
;
360 memcpy(&p
->attrs
, attrs
, sizeof(p
->attrs
));
362 p
->c_arg
.fh
= &p
->o_res
.fh
;
363 p
->c_arg
.stateid
= &p
->o_res
.stateid
;
364 p
->c_arg
.seqid
= p
->o_arg
.seqid
;
365 nfs4_init_opendata_res(p
);
375 static void nfs4_opendata_free(struct kref
*kref
)
377 struct nfs4_opendata
*p
= container_of(kref
,
378 struct nfs4_opendata
, kref
);
380 nfs_free_seqid(p
->o_arg
.seqid
);
381 if (p
->state
!= NULL
)
382 nfs4_put_open_state(p
->state
);
383 nfs4_put_state_owner(p
->owner
);
389 static void nfs4_opendata_put(struct nfs4_opendata
*p
)
392 kref_put(&p
->kref
, nfs4_opendata_free
);
395 static int nfs4_wait_for_completion_rpc_task(struct rpc_task
*task
)
399 ret
= rpc_wait_for_completion_task(task
);
403 static int can_open_cached(struct nfs4_state
*state
, fmode_t mode
, int open_mode
)
407 if (open_mode
& O_EXCL
)
409 switch (mode
& (FMODE_READ
|FMODE_WRITE
)) {
411 ret
|= test_bit(NFS_O_RDONLY_STATE
, &state
->flags
) != 0;
414 ret
|= test_bit(NFS_O_WRONLY_STATE
, &state
->flags
) != 0;
416 case FMODE_READ
|FMODE_WRITE
:
417 ret
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
) != 0;
423 static int can_open_delegated(struct nfs_delegation
*delegation
, fmode_t fmode
)
425 if ((delegation
->type
& fmode
) != fmode
)
427 if (test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
))
429 nfs_mark_delegation_referenced(delegation
);
433 static void update_open_stateflags(struct nfs4_state
*state
, fmode_t fmode
)
442 case FMODE_READ
|FMODE_WRITE
:
445 nfs4_state_set_mode_locked(state
, state
->state
| fmode
);
448 static void nfs_set_open_stateid_locked(struct nfs4_state
*state
, nfs4_stateid
*stateid
, fmode_t fmode
)
450 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0)
451 memcpy(state
->stateid
.data
, stateid
->data
, sizeof(state
->stateid
.data
));
452 memcpy(state
->open_stateid
.data
, stateid
->data
, sizeof(state
->open_stateid
.data
));
455 set_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
458 set_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
460 case FMODE_READ
|FMODE_WRITE
:
461 set_bit(NFS_O_RDWR_STATE
, &state
->flags
);
465 static void nfs_set_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*stateid
, fmode_t fmode
)
467 write_seqlock(&state
->seqlock
);
468 nfs_set_open_stateid_locked(state
, stateid
, fmode
);
469 write_sequnlock(&state
->seqlock
);
472 static void __update_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*open_stateid
, const nfs4_stateid
*deleg_stateid
, fmode_t fmode
)
475 * Protect the call to nfs4_state_set_mode_locked and
476 * serialise the stateid update
478 write_seqlock(&state
->seqlock
);
479 if (deleg_stateid
!= NULL
) {
480 memcpy(state
->stateid
.data
, deleg_stateid
->data
, sizeof(state
->stateid
.data
));
481 set_bit(NFS_DELEGATED_STATE
, &state
->flags
);
483 if (open_stateid
!= NULL
)
484 nfs_set_open_stateid_locked(state
, open_stateid
, fmode
);
485 write_sequnlock(&state
->seqlock
);
486 spin_lock(&state
->owner
->so_lock
);
487 update_open_stateflags(state
, fmode
);
488 spin_unlock(&state
->owner
->so_lock
);
491 static int update_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*open_stateid
, nfs4_stateid
*delegation
, fmode_t fmode
)
493 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
494 struct nfs_delegation
*deleg_cur
;
497 fmode
&= (FMODE_READ
|FMODE_WRITE
);
500 deleg_cur
= rcu_dereference(nfsi
->delegation
);
501 if (deleg_cur
== NULL
)
504 spin_lock(&deleg_cur
->lock
);
505 if (nfsi
->delegation
!= deleg_cur
||
506 (deleg_cur
->type
& fmode
) != fmode
)
507 goto no_delegation_unlock
;
509 if (delegation
== NULL
)
510 delegation
= &deleg_cur
->stateid
;
511 else if (memcmp(deleg_cur
->stateid
.data
, delegation
->data
, NFS4_STATEID_SIZE
) != 0)
512 goto no_delegation_unlock
;
514 nfs_mark_delegation_referenced(deleg_cur
);
515 __update_open_stateid(state
, open_stateid
, &deleg_cur
->stateid
, fmode
);
517 no_delegation_unlock
:
518 spin_unlock(&deleg_cur
->lock
);
522 if (!ret
&& open_stateid
!= NULL
) {
523 __update_open_stateid(state
, open_stateid
, NULL
, fmode
);
531 static void nfs4_return_incompatible_delegation(struct inode
*inode
, fmode_t fmode
)
533 struct nfs_delegation
*delegation
;
536 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
537 if (delegation
== NULL
|| (delegation
->type
& fmode
) == fmode
) {
542 nfs_inode_return_delegation(inode
);
545 static struct nfs4_state
*nfs4_try_open_cached(struct nfs4_opendata
*opendata
)
547 struct nfs4_state
*state
= opendata
->state
;
548 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
549 struct nfs_delegation
*delegation
;
550 int open_mode
= opendata
->o_arg
.open_flags
& O_EXCL
;
551 fmode_t fmode
= opendata
->o_arg
.fmode
;
552 nfs4_stateid stateid
;
556 if (can_open_cached(state
, fmode
, open_mode
)) {
557 spin_lock(&state
->owner
->so_lock
);
558 if (can_open_cached(state
, fmode
, open_mode
)) {
559 update_open_stateflags(state
, fmode
);
560 spin_unlock(&state
->owner
->so_lock
);
561 goto out_return_state
;
563 spin_unlock(&state
->owner
->so_lock
);
566 delegation
= rcu_dereference(nfsi
->delegation
);
567 if (delegation
== NULL
||
568 !can_open_delegated(delegation
, fmode
)) {
572 /* Save the delegation */
573 memcpy(stateid
.data
, delegation
->stateid
.data
, sizeof(stateid
.data
));
575 ret
= nfs_may_open(state
->inode
, state
->owner
->so_cred
, open_mode
);
580 /* Try to update the stateid using the delegation */
581 if (update_open_stateid(state
, NULL
, &stateid
, fmode
))
582 goto out_return_state
;
587 atomic_inc(&state
->count
);
591 static struct nfs4_state
*nfs4_opendata_to_nfs4_state(struct nfs4_opendata
*data
)
594 struct nfs4_state
*state
= NULL
;
595 struct nfs_delegation
*delegation
;
598 if (!data
->rpc_done
) {
599 state
= nfs4_try_open_cached(data
);
604 if (!(data
->f_attr
.valid
& NFS_ATTR_FATTR
))
606 inode
= nfs_fhget(data
->dir
->d_sb
, &data
->o_res
.fh
, &data
->f_attr
);
607 ret
= PTR_ERR(inode
);
611 state
= nfs4_get_open_state(inode
, data
->owner
);
614 if (data
->o_res
.delegation_type
!= 0) {
615 int delegation_flags
= 0;
618 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
620 delegation_flags
= delegation
->flags
;
622 if ((delegation_flags
& 1UL<<NFS_DELEGATION_NEED_RECLAIM
) == 0)
623 nfs_inode_set_delegation(state
->inode
,
624 data
->owner
->so_cred
,
627 nfs_inode_reclaim_delegation(state
->inode
,
628 data
->owner
->so_cred
,
632 update_open_stateid(state
, &data
->o_res
.stateid
, NULL
,
643 static struct nfs_open_context
*nfs4_state_find_open_context(struct nfs4_state
*state
)
645 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
646 struct nfs_open_context
*ctx
;
648 spin_lock(&state
->inode
->i_lock
);
649 list_for_each_entry(ctx
, &nfsi
->open_files
, list
) {
650 if (ctx
->state
!= state
)
652 get_nfs_open_context(ctx
);
653 spin_unlock(&state
->inode
->i_lock
);
656 spin_unlock(&state
->inode
->i_lock
);
657 return ERR_PTR(-ENOENT
);
660 static struct nfs4_opendata
*nfs4_open_recoverdata_alloc(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
662 struct nfs4_opendata
*opendata
;
664 opendata
= nfs4_opendata_alloc(&ctx
->path
, state
->owner
, 0, 0, NULL
);
665 if (opendata
== NULL
)
666 return ERR_PTR(-ENOMEM
);
667 opendata
->state
= state
;
668 atomic_inc(&state
->count
);
672 static int nfs4_open_recover_helper(struct nfs4_opendata
*opendata
, fmode_t fmode
, struct nfs4_state
**res
)
674 struct nfs4_state
*newstate
;
677 opendata
->o_arg
.open_flags
= 0;
678 opendata
->o_arg
.fmode
= fmode
;
679 memset(&opendata
->o_res
, 0, sizeof(opendata
->o_res
));
680 memset(&opendata
->c_res
, 0, sizeof(opendata
->c_res
));
681 nfs4_init_opendata_res(opendata
);
682 ret
= _nfs4_proc_open(opendata
);
685 newstate
= nfs4_opendata_to_nfs4_state(opendata
);
686 if (IS_ERR(newstate
))
687 return PTR_ERR(newstate
);
688 nfs4_close_state(&opendata
->path
, newstate
, fmode
);
693 static int nfs4_open_recover(struct nfs4_opendata
*opendata
, struct nfs4_state
*state
)
695 struct nfs4_state
*newstate
;
698 /* memory barrier prior to reading state->n_* */
699 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
701 if (state
->n_rdwr
!= 0) {
702 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
|FMODE_WRITE
, &newstate
);
705 if (newstate
!= state
)
708 if (state
->n_wronly
!= 0) {
709 ret
= nfs4_open_recover_helper(opendata
, FMODE_WRITE
, &newstate
);
712 if (newstate
!= state
)
715 if (state
->n_rdonly
!= 0) {
716 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
, &newstate
);
719 if (newstate
!= state
)
723 * We may have performed cached opens for all three recoveries.
724 * Check if we need to update the current stateid.
726 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0 &&
727 memcmp(state
->stateid
.data
, state
->open_stateid
.data
, sizeof(state
->stateid
.data
)) != 0) {
728 write_seqlock(&state
->seqlock
);
729 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0)
730 memcpy(state
->stateid
.data
, state
->open_stateid
.data
, sizeof(state
->stateid
.data
));
731 write_sequnlock(&state
->seqlock
);
738 * reclaim state on the server after a reboot.
740 static int _nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
742 struct nfs_delegation
*delegation
;
743 struct nfs4_opendata
*opendata
;
744 fmode_t delegation_type
= 0;
747 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
748 if (IS_ERR(opendata
))
749 return PTR_ERR(opendata
);
750 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_PREVIOUS
;
751 opendata
->o_arg
.fh
= NFS_FH(state
->inode
);
753 delegation
= rcu_dereference(NFS_I(state
->inode
)->delegation
);
754 if (delegation
!= NULL
&& test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
) != 0)
755 delegation_type
= delegation
->type
;
757 opendata
->o_arg
.u
.delegation_type
= delegation_type
;
758 status
= nfs4_open_recover(opendata
, state
);
759 nfs4_opendata_put(opendata
);
763 static int nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
765 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
766 struct nfs4_exception exception
= { };
769 err
= _nfs4_do_open_reclaim(ctx
, state
);
770 if (err
!= -NFS4ERR_DELAY
)
772 nfs4_handle_exception(server
, err
, &exception
);
773 } while (exception
.retry
);
777 static int nfs4_open_reclaim(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
779 struct nfs_open_context
*ctx
;
782 ctx
= nfs4_state_find_open_context(state
);
785 ret
= nfs4_do_open_reclaim(ctx
, state
);
786 put_nfs_open_context(ctx
);
790 static int _nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
792 struct nfs4_opendata
*opendata
;
795 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
796 if (IS_ERR(opendata
))
797 return PTR_ERR(opendata
);
798 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_DELEGATE_CUR
;
799 memcpy(opendata
->o_arg
.u
.delegation
.data
, stateid
->data
,
800 sizeof(opendata
->o_arg
.u
.delegation
.data
));
801 ret
= nfs4_open_recover(opendata
, state
);
802 nfs4_opendata_put(opendata
);
806 int nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
808 struct nfs4_exception exception
= { };
809 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
812 err
= _nfs4_open_delegation_recall(ctx
, state
, stateid
);
816 case -NFS4ERR_STALE_CLIENTID
:
817 case -NFS4ERR_STALE_STATEID
:
818 case -NFS4ERR_EXPIRED
:
819 /* Don't recall a delegation if it was lost */
820 nfs4_schedule_state_recovery(server
->nfs_client
);
823 err
= nfs4_handle_exception(server
, err
, &exception
);
824 } while (exception
.retry
);
828 static void nfs4_open_confirm_done(struct rpc_task
*task
, void *calldata
)
830 struct nfs4_opendata
*data
= calldata
;
832 data
->rpc_status
= task
->tk_status
;
833 if (RPC_ASSASSINATED(task
))
835 if (data
->rpc_status
== 0) {
836 memcpy(data
->o_res
.stateid
.data
, data
->c_res
.stateid
.data
,
837 sizeof(data
->o_res
.stateid
.data
));
838 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
839 renew_lease(data
->o_res
.server
, data
->timestamp
);
844 static void nfs4_open_confirm_release(void *calldata
)
846 struct nfs4_opendata
*data
= calldata
;
847 struct nfs4_state
*state
= NULL
;
849 /* If this request hasn't been cancelled, do nothing */
850 if (data
->cancelled
== 0)
852 /* In case of error, no cleanup! */
855 state
= nfs4_opendata_to_nfs4_state(data
);
857 nfs4_close_state(&data
->path
, state
, data
->o_arg
.fmode
);
859 nfs4_opendata_put(data
);
862 static const struct rpc_call_ops nfs4_open_confirm_ops
= {
863 .rpc_call_done
= nfs4_open_confirm_done
,
864 .rpc_release
= nfs4_open_confirm_release
,
868 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
870 static int _nfs4_proc_open_confirm(struct nfs4_opendata
*data
)
872 struct nfs_server
*server
= NFS_SERVER(data
->dir
->d_inode
);
873 struct rpc_task
*task
;
874 struct rpc_message msg
= {
875 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_CONFIRM
],
876 .rpc_argp
= &data
->c_arg
,
877 .rpc_resp
= &data
->c_res
,
878 .rpc_cred
= data
->owner
->so_cred
,
880 struct rpc_task_setup task_setup_data
= {
881 .rpc_client
= server
->client
,
883 .callback_ops
= &nfs4_open_confirm_ops
,
884 .callback_data
= data
,
885 .workqueue
= nfsiod_workqueue
,
886 .flags
= RPC_TASK_ASYNC
,
890 kref_get(&data
->kref
);
892 data
->rpc_status
= 0;
893 data
->timestamp
= jiffies
;
894 task
= rpc_run_task(&task_setup_data
);
896 return PTR_ERR(task
);
897 status
= nfs4_wait_for_completion_rpc_task(task
);
902 status
= data
->rpc_status
;
907 static void nfs4_open_prepare(struct rpc_task
*task
, void *calldata
)
909 struct nfs4_opendata
*data
= calldata
;
910 struct nfs4_state_owner
*sp
= data
->owner
;
912 if (nfs_wait_on_sequence(data
->o_arg
.seqid
, task
) != 0)
915 * Check if we still need to send an OPEN call, or if we can use
916 * a delegation instead.
918 if (data
->state
!= NULL
) {
919 struct nfs_delegation
*delegation
;
921 if (can_open_cached(data
->state
, data
->o_arg
.fmode
, data
->o_arg
.open_flags
))
924 delegation
= rcu_dereference(NFS_I(data
->state
->inode
)->delegation
);
925 if (delegation
!= NULL
&&
926 test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
) == 0) {
932 /* Update sequence id. */
933 data
->o_arg
.id
= sp
->so_owner_id
.id
;
934 data
->o_arg
.clientid
= sp
->so_client
->cl_clientid
;
935 if (data
->o_arg
.claim
== NFS4_OPEN_CLAIM_PREVIOUS
) {
936 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_NOATTR
];
937 nfs_copy_fh(&data
->o_res
.fh
, data
->o_arg
.fh
);
939 data
->timestamp
= jiffies
;
940 rpc_call_start(task
);
943 task
->tk_action
= NULL
;
947 static void nfs4_open_done(struct rpc_task
*task
, void *calldata
)
949 struct nfs4_opendata
*data
= calldata
;
951 data
->rpc_status
= task
->tk_status
;
952 if (RPC_ASSASSINATED(task
))
954 if (task
->tk_status
== 0) {
955 switch (data
->o_res
.f_attr
->mode
& S_IFMT
) {
959 data
->rpc_status
= -ELOOP
;
962 data
->rpc_status
= -EISDIR
;
965 data
->rpc_status
= -ENOTDIR
;
967 renew_lease(data
->o_res
.server
, data
->timestamp
);
968 if (!(data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
))
969 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
974 static void nfs4_open_release(void *calldata
)
976 struct nfs4_opendata
*data
= calldata
;
977 struct nfs4_state
*state
= NULL
;
979 /* If this request hasn't been cancelled, do nothing */
980 if (data
->cancelled
== 0)
982 /* In case of error, no cleanup! */
983 if (data
->rpc_status
!= 0 || !data
->rpc_done
)
985 /* In case we need an open_confirm, no cleanup! */
986 if (data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
)
988 state
= nfs4_opendata_to_nfs4_state(data
);
990 nfs4_close_state(&data
->path
, state
, data
->o_arg
.fmode
);
992 nfs4_opendata_put(data
);
995 static const struct rpc_call_ops nfs4_open_ops
= {
996 .rpc_call_prepare
= nfs4_open_prepare
,
997 .rpc_call_done
= nfs4_open_done
,
998 .rpc_release
= nfs4_open_release
,
1002 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1004 static int _nfs4_proc_open(struct nfs4_opendata
*data
)
1006 struct inode
*dir
= data
->dir
->d_inode
;
1007 struct nfs_server
*server
= NFS_SERVER(dir
);
1008 struct nfs_openargs
*o_arg
= &data
->o_arg
;
1009 struct nfs_openres
*o_res
= &data
->o_res
;
1010 struct rpc_task
*task
;
1011 struct rpc_message msg
= {
1012 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN
],
1015 .rpc_cred
= data
->owner
->so_cred
,
1017 struct rpc_task_setup task_setup_data
= {
1018 .rpc_client
= server
->client
,
1019 .rpc_message
= &msg
,
1020 .callback_ops
= &nfs4_open_ops
,
1021 .callback_data
= data
,
1022 .workqueue
= nfsiod_workqueue
,
1023 .flags
= RPC_TASK_ASYNC
,
1027 kref_get(&data
->kref
);
1029 data
->rpc_status
= 0;
1030 data
->cancelled
= 0;
1031 task
= rpc_run_task(&task_setup_data
);
1033 return PTR_ERR(task
);
1034 status
= nfs4_wait_for_completion_rpc_task(task
);
1036 data
->cancelled
= 1;
1039 status
= data
->rpc_status
;
1041 if (status
!= 0 || !data
->rpc_done
)
1044 if (o_res
->fh
.size
== 0)
1045 _nfs4_proc_lookup(dir
, o_arg
->name
, &o_res
->fh
, o_res
->f_attr
);
1047 if (o_arg
->open_flags
& O_CREAT
) {
1048 update_changeattr(dir
, &o_res
->cinfo
);
1049 nfs_post_op_update_inode(dir
, o_res
->dir_attr
);
1051 nfs_refresh_inode(dir
, o_res
->dir_attr
);
1052 if(o_res
->rflags
& NFS4_OPEN_RESULT_CONFIRM
) {
1053 status
= _nfs4_proc_open_confirm(data
);
1057 if (!(o_res
->f_attr
->valid
& NFS_ATTR_FATTR
))
1058 _nfs4_proc_getattr(server
, &o_res
->fh
, o_res
->f_attr
);
1062 static int nfs4_recover_expired_lease(struct nfs_server
*server
)
1064 struct nfs_client
*clp
= server
->nfs_client
;
1068 ret
= nfs4_wait_clnt_recover(clp
);
1071 if (!test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) &&
1072 !test_bit(NFS4CLNT_CHECK_LEASE
,&clp
->cl_state
))
1074 nfs4_schedule_state_recovery(clp
);
1081 * reclaim state on the server after a network partition.
1082 * Assumes caller holds the appropriate lock
1084 static int _nfs4_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1086 struct nfs4_opendata
*opendata
;
1089 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
1090 if (IS_ERR(opendata
))
1091 return PTR_ERR(opendata
);
1092 ret
= nfs4_open_recover(opendata
, state
);
1094 d_drop(ctx
->path
.dentry
);
1095 nfs4_opendata_put(opendata
);
1099 static inline int nfs4_do_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1101 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1102 struct nfs4_exception exception
= { };
1106 err
= _nfs4_open_expired(ctx
, state
);
1107 if (err
== -NFS4ERR_DELAY
)
1108 nfs4_handle_exception(server
, err
, &exception
);
1109 } while (exception
.retry
);
1113 static int nfs4_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
1115 struct nfs_open_context
*ctx
;
1118 ctx
= nfs4_state_find_open_context(state
);
1120 return PTR_ERR(ctx
);
1121 ret
= nfs4_do_open_expired(ctx
, state
);
1122 put_nfs_open_context(ctx
);
1127 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1128 * fields corresponding to attributes that were used to store the verifier.
1129 * Make sure we clobber those fields in the later setattr call
1131 static inline void nfs4_exclusive_attrset(struct nfs4_opendata
*opendata
, struct iattr
*sattr
)
1133 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_ACCESS
) &&
1134 !(sattr
->ia_valid
& ATTR_ATIME_SET
))
1135 sattr
->ia_valid
|= ATTR_ATIME
;
1137 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_MODIFY
) &&
1138 !(sattr
->ia_valid
& ATTR_MTIME_SET
))
1139 sattr
->ia_valid
|= ATTR_MTIME
;
1143 * Returns a referenced nfs4_state
1145 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
)
1147 struct nfs4_state_owner
*sp
;
1148 struct nfs4_state
*state
= NULL
;
1149 struct nfs_server
*server
= NFS_SERVER(dir
);
1150 struct nfs4_opendata
*opendata
;
1153 /* Protect against reboot recovery conflicts */
1155 if (!(sp
= nfs4_get_state_owner(server
, cred
))) {
1156 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1159 status
= nfs4_recover_expired_lease(server
);
1161 goto err_put_state_owner
;
1162 if (path
->dentry
->d_inode
!= NULL
)
1163 nfs4_return_incompatible_delegation(path
->dentry
->d_inode
, fmode
);
1165 opendata
= nfs4_opendata_alloc(path
, sp
, fmode
, flags
, sattr
);
1166 if (opendata
== NULL
)
1167 goto err_put_state_owner
;
1169 if (path
->dentry
->d_inode
!= NULL
)
1170 opendata
->state
= nfs4_get_open_state(path
->dentry
->d_inode
, sp
);
1172 status
= _nfs4_proc_open(opendata
);
1174 goto err_opendata_put
;
1176 if (opendata
->o_arg
.open_flags
& O_EXCL
)
1177 nfs4_exclusive_attrset(opendata
, sattr
);
1179 state
= nfs4_opendata_to_nfs4_state(opendata
);
1180 status
= PTR_ERR(state
);
1182 goto err_opendata_put
;
1183 nfs4_opendata_put(opendata
);
1184 nfs4_put_state_owner(sp
);
1188 nfs4_opendata_put(opendata
);
1189 err_put_state_owner
:
1190 nfs4_put_state_owner(sp
);
1197 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
)
1199 struct nfs4_exception exception
= { };
1200 struct nfs4_state
*res
;
1204 status
= _nfs4_do_open(dir
, path
, fmode
, flags
, sattr
, cred
, &res
);
1207 /* NOTE: BAD_SEQID means the server and client disagree about the
1208 * book-keeping w.r.t. state-changing operations
1209 * (OPEN/CLOSE/LOCK/LOCKU...)
1210 * It is actually a sign of a bug on the client or on the server.
1212 * If we receive a BAD_SEQID error in the particular case of
1213 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1214 * have unhashed the old state_owner for us, and that we can
1215 * therefore safely retry using a new one. We should still warn
1216 * the user though...
1218 if (status
== -NFS4ERR_BAD_SEQID
) {
1219 printk(KERN_WARNING
"NFS: v4 server %s "
1220 " returned a bad sequence-id error!\n",
1221 NFS_SERVER(dir
)->nfs_client
->cl_hostname
);
1222 exception
.retry
= 1;
1226 * BAD_STATEID on OPEN means that the server cancelled our
1227 * state before it received the OPEN_CONFIRM.
1228 * Recover by retrying the request as per the discussion
1229 * on Page 181 of RFC3530.
1231 if (status
== -NFS4ERR_BAD_STATEID
) {
1232 exception
.retry
= 1;
1235 if (status
== -EAGAIN
) {
1236 /* We must have found a delegation */
1237 exception
.retry
= 1;
1240 res
= ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir
),
1241 status
, &exception
));
1242 } while (exception
.retry
);
1246 static int _nfs4_do_setattr(struct inode
*inode
, struct rpc_cred
*cred
,
1247 struct nfs_fattr
*fattr
, struct iattr
*sattr
,
1248 struct nfs4_state
*state
)
1250 struct nfs_server
*server
= NFS_SERVER(inode
);
1251 struct nfs_setattrargs arg
= {
1252 .fh
= NFS_FH(inode
),
1255 .bitmask
= server
->attr_bitmask
,
1257 struct nfs_setattrres res
= {
1261 struct rpc_message msg
= {
1262 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETATTR
],
1267 unsigned long timestamp
= jiffies
;
1270 nfs_fattr_init(fattr
);
1272 if (nfs4_copy_delegation_stateid(&arg
.stateid
, inode
)) {
1273 /* Use that stateid */
1274 } else if (state
!= NULL
) {
1275 nfs4_copy_stateid(&arg
.stateid
, state
, current
->files
);
1277 memcpy(&arg
.stateid
, &zero_stateid
, sizeof(arg
.stateid
));
1279 status
= rpc_call_sync(server
->client
, &msg
, 0);
1280 if (status
== 0 && state
!= NULL
)
1281 renew_lease(server
, timestamp
);
1285 static int nfs4_do_setattr(struct inode
*inode
, struct rpc_cred
*cred
,
1286 struct nfs_fattr
*fattr
, struct iattr
*sattr
,
1287 struct nfs4_state
*state
)
1289 struct nfs_server
*server
= NFS_SERVER(inode
);
1290 struct nfs4_exception exception
= { };
1293 err
= nfs4_handle_exception(server
,
1294 _nfs4_do_setattr(inode
, cred
, fattr
, sattr
, state
),
1296 } while (exception
.retry
);
1300 struct nfs4_closedata
{
1302 struct inode
*inode
;
1303 struct nfs4_state
*state
;
1304 struct nfs_closeargs arg
;
1305 struct nfs_closeres res
;
1306 struct nfs_fattr fattr
;
1307 unsigned long timestamp
;
1310 static void nfs4_free_closedata(void *data
)
1312 struct nfs4_closedata
*calldata
= data
;
1313 struct nfs4_state_owner
*sp
= calldata
->state
->owner
;
1315 nfs4_put_open_state(calldata
->state
);
1316 nfs_free_seqid(calldata
->arg
.seqid
);
1317 nfs4_put_state_owner(sp
);
1318 path_put(&calldata
->path
);
1322 static void nfs4_close_done(struct rpc_task
*task
, void *data
)
1324 struct nfs4_closedata
*calldata
= data
;
1325 struct nfs4_state
*state
= calldata
->state
;
1326 struct nfs_server
*server
= NFS_SERVER(calldata
->inode
);
1328 if (RPC_ASSASSINATED(task
))
1330 /* hmm. we are done with the inode, and in the process of freeing
1331 * the state_owner. we keep this around to process errors
1333 switch (task
->tk_status
) {
1335 nfs_set_open_stateid(state
, &calldata
->res
.stateid
, 0);
1336 renew_lease(server
, calldata
->timestamp
);
1338 case -NFS4ERR_STALE_STATEID
:
1339 case -NFS4ERR_OLD_STATEID
:
1340 case -NFS4ERR_BAD_STATEID
:
1341 case -NFS4ERR_EXPIRED
:
1342 if (calldata
->arg
.fmode
== 0)
1345 if (nfs4_async_handle_error(task
, server
, state
) == -EAGAIN
) {
1346 rpc_restart_call(task
);
1350 nfs_refresh_inode(calldata
->inode
, calldata
->res
.fattr
);
1353 static void nfs4_close_prepare(struct rpc_task
*task
, void *data
)
1355 struct nfs4_closedata
*calldata
= data
;
1356 struct nfs4_state
*state
= calldata
->state
;
1357 int clear_rd
, clear_wr
, clear_rdwr
;
1359 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
1362 clear_rd
= clear_wr
= clear_rdwr
= 0;
1363 spin_lock(&state
->owner
->so_lock
);
1364 /* Calculate the change in open mode */
1365 if (state
->n_rdwr
== 0) {
1366 if (state
->n_rdonly
== 0) {
1367 clear_rd
|= test_and_clear_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
1368 clear_rdwr
|= test_and_clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1370 if (state
->n_wronly
== 0) {
1371 clear_wr
|= test_and_clear_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
1372 clear_rdwr
|= test_and_clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1375 spin_unlock(&state
->owner
->so_lock
);
1376 if (!clear_rd
&& !clear_wr
&& !clear_rdwr
) {
1377 /* Note: exit _without_ calling nfs4_close_done */
1378 task
->tk_action
= NULL
;
1381 nfs_fattr_init(calldata
->res
.fattr
);
1382 if (test_bit(NFS_O_RDONLY_STATE
, &state
->flags
) != 0) {
1383 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_DOWNGRADE
];
1384 calldata
->arg
.fmode
= FMODE_READ
;
1385 } else if (test_bit(NFS_O_WRONLY_STATE
, &state
->flags
) != 0) {
1386 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_DOWNGRADE
];
1387 calldata
->arg
.fmode
= FMODE_WRITE
;
1389 calldata
->timestamp
= jiffies
;
1390 rpc_call_start(task
);
1393 static const struct rpc_call_ops nfs4_close_ops
= {
1394 .rpc_call_prepare
= nfs4_close_prepare
,
1395 .rpc_call_done
= nfs4_close_done
,
1396 .rpc_release
= nfs4_free_closedata
,
1400 * It is possible for data to be read/written from a mem-mapped file
1401 * after the sys_close call (which hits the vfs layer as a flush).
1402 * This means that we can't safely call nfsv4 close on a file until
1403 * the inode is cleared. This in turn means that we are not good
1404 * NFSv4 citizens - we do not indicate to the server to update the file's
1405 * share state even when we are done with one of the three share
1406 * stateid's in the inode.
1408 * NOTE: Caller must be holding the sp->so_owner semaphore!
1410 int nfs4_do_close(struct path
*path
, struct nfs4_state
*state
, int wait
)
1412 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1413 struct nfs4_closedata
*calldata
;
1414 struct nfs4_state_owner
*sp
= state
->owner
;
1415 struct rpc_task
*task
;
1416 struct rpc_message msg
= {
1417 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CLOSE
],
1418 .rpc_cred
= state
->owner
->so_cred
,
1420 struct rpc_task_setup task_setup_data
= {
1421 .rpc_client
= server
->client
,
1422 .rpc_message
= &msg
,
1423 .callback_ops
= &nfs4_close_ops
,
1424 .workqueue
= nfsiod_workqueue
,
1425 .flags
= RPC_TASK_ASYNC
,
1427 int status
= -ENOMEM
;
1429 calldata
= kmalloc(sizeof(*calldata
), GFP_KERNEL
);
1430 if (calldata
== NULL
)
1432 calldata
->inode
= state
->inode
;
1433 calldata
->state
= state
;
1434 calldata
->arg
.fh
= NFS_FH(state
->inode
);
1435 calldata
->arg
.stateid
= &state
->open_stateid
;
1436 /* Serialization for the sequence id */
1437 calldata
->arg
.seqid
= nfs_alloc_seqid(&state
->owner
->so_seqid
);
1438 if (calldata
->arg
.seqid
== NULL
)
1439 goto out_free_calldata
;
1440 calldata
->arg
.fmode
= 0;
1441 calldata
->arg
.bitmask
= server
->attr_bitmask
;
1442 calldata
->res
.fattr
= &calldata
->fattr
;
1443 calldata
->res
.seqid
= calldata
->arg
.seqid
;
1444 calldata
->res
.server
= server
;
1445 calldata
->path
.mnt
= mntget(path
->mnt
);
1446 calldata
->path
.dentry
= dget(path
->dentry
);
1448 msg
.rpc_argp
= &calldata
->arg
,
1449 msg
.rpc_resp
= &calldata
->res
,
1450 task_setup_data
.callback_data
= calldata
;
1451 task
= rpc_run_task(&task_setup_data
);
1453 return PTR_ERR(task
);
1456 status
= rpc_wait_for_completion_task(task
);
1462 nfs4_put_open_state(state
);
1463 nfs4_put_state_owner(sp
);
1467 static int nfs4_intent_set_file(struct nameidata
*nd
, struct path
*path
, struct nfs4_state
*state
, fmode_t fmode
)
1472 /* If the open_intent is for execute, we have an extra check to make */
1473 if (fmode
& FMODE_EXEC
) {
1474 ret
= nfs_may_open(state
->inode
,
1475 state
->owner
->so_cred
,
1476 nd
->intent
.open
.flags
);
1480 filp
= lookup_instantiate_filp(nd
, path
->dentry
, NULL
);
1481 if (!IS_ERR(filp
)) {
1482 struct nfs_open_context
*ctx
;
1483 ctx
= nfs_file_open_context(filp
);
1487 ret
= PTR_ERR(filp
);
1489 nfs4_close_sync(path
, state
, fmode
& (FMODE_READ
|FMODE_WRITE
));
1494 nfs4_atomic_open(struct inode
*dir
, struct dentry
*dentry
, struct nameidata
*nd
)
1496 struct path path
= {
1497 .mnt
= nd
->path
.mnt
,
1500 struct dentry
*parent
;
1502 struct rpc_cred
*cred
;
1503 struct nfs4_state
*state
;
1505 fmode_t fmode
= nd
->intent
.open
.flags
& (FMODE_READ
| FMODE_WRITE
| FMODE_EXEC
);
1507 if (nd
->flags
& LOOKUP_CREATE
) {
1508 attr
.ia_mode
= nd
->intent
.open
.create_mode
;
1509 attr
.ia_valid
= ATTR_MODE
;
1510 if (!IS_POSIXACL(dir
))
1511 attr
.ia_mode
&= ~current
->fs
->umask
;
1514 BUG_ON(nd
->intent
.open
.flags
& O_CREAT
);
1517 cred
= rpc_lookup_cred();
1519 return (struct dentry
*)cred
;
1520 parent
= dentry
->d_parent
;
1521 /* Protect against concurrent sillydeletes */
1522 nfs_block_sillyrename(parent
);
1523 state
= nfs4_do_open(dir
, &path
, fmode
, nd
->intent
.open
.flags
, &attr
, cred
);
1525 if (IS_ERR(state
)) {
1526 if (PTR_ERR(state
) == -ENOENT
) {
1527 d_add(dentry
, NULL
);
1528 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
1530 nfs_unblock_sillyrename(parent
);
1531 return (struct dentry
*)state
;
1533 res
= d_add_unique(dentry
, igrab(state
->inode
));
1536 nfs_set_verifier(path
.dentry
, nfs_save_change_attribute(dir
));
1537 nfs_unblock_sillyrename(parent
);
1538 nfs4_intent_set_file(nd
, &path
, state
, fmode
);
1543 nfs4_open_revalidate(struct inode
*dir
, struct dentry
*dentry
, int openflags
, struct nameidata
*nd
)
1545 struct path path
= {
1546 .mnt
= nd
->path
.mnt
,
1549 struct rpc_cred
*cred
;
1550 struct nfs4_state
*state
;
1551 fmode_t fmode
= openflags
& (FMODE_READ
| FMODE_WRITE
);
1553 cred
= rpc_lookup_cred();
1555 return PTR_ERR(cred
);
1556 state
= nfs4_do_open(dir
, &path
, fmode
, openflags
, NULL
, cred
);
1558 if (IS_ERR(state
)) {
1559 switch (PTR_ERR(state
)) {
1565 lookup_instantiate_filp(nd
, (struct dentry
*)state
, NULL
);
1571 if (state
->inode
== dentry
->d_inode
) {
1572 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
1573 nfs4_intent_set_file(nd
, &path
, state
, fmode
);
1576 nfs4_close_sync(&path
, state
, fmode
);
1583 static int _nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1585 struct nfs4_server_caps_res res
= {};
1586 struct rpc_message msg
= {
1587 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SERVER_CAPS
],
1588 .rpc_argp
= fhandle
,
1593 status
= rpc_call_sync(server
->client
, &msg
, 0);
1595 memcpy(server
->attr_bitmask
, res
.attr_bitmask
, sizeof(server
->attr_bitmask
));
1596 if (res
.attr_bitmask
[0] & FATTR4_WORD0_ACL
)
1597 server
->caps
|= NFS_CAP_ACLS
;
1598 if (res
.has_links
!= 0)
1599 server
->caps
|= NFS_CAP_HARDLINKS
;
1600 if (res
.has_symlinks
!= 0)
1601 server
->caps
|= NFS_CAP_SYMLINKS
;
1602 server
->acl_bitmask
= res
.acl_bitmask
;
1607 int nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1609 struct nfs4_exception exception
= { };
1612 err
= nfs4_handle_exception(server
,
1613 _nfs4_server_capabilities(server
, fhandle
),
1615 } while (exception
.retry
);
1619 static int _nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1620 struct nfs_fsinfo
*info
)
1622 struct nfs4_lookup_root_arg args
= {
1623 .bitmask
= nfs4_fattr_bitmap
,
1625 struct nfs4_lookup_res res
= {
1627 .fattr
= info
->fattr
,
1630 struct rpc_message msg
= {
1631 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP_ROOT
],
1635 nfs_fattr_init(info
->fattr
);
1636 return rpc_call_sync(server
->client
, &msg
, 0);
1639 static int nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1640 struct nfs_fsinfo
*info
)
1642 struct nfs4_exception exception
= { };
1645 err
= nfs4_handle_exception(server
,
1646 _nfs4_lookup_root(server
, fhandle
, info
),
1648 } while (exception
.retry
);
1653 * get the file handle for the "/" directory on the server
1655 static int nfs4_proc_get_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1656 struct nfs_fsinfo
*info
)
1660 status
= nfs4_lookup_root(server
, fhandle
, info
);
1662 status
= nfs4_server_capabilities(server
, fhandle
);
1664 status
= nfs4_do_fsinfo(server
, fhandle
, info
);
1665 return nfs4_map_errors(status
);
1669 * Get locations and (maybe) other attributes of a referral.
1670 * Note that we'll actually follow the referral later when
1671 * we detect fsid mismatch in inode revalidation
1673 static int nfs4_get_referral(struct inode
*dir
, const struct qstr
*name
, struct nfs_fattr
*fattr
, struct nfs_fh
*fhandle
)
1675 int status
= -ENOMEM
;
1676 struct page
*page
= NULL
;
1677 struct nfs4_fs_locations
*locations
= NULL
;
1679 page
= alloc_page(GFP_KERNEL
);
1682 locations
= kmalloc(sizeof(struct nfs4_fs_locations
), GFP_KERNEL
);
1683 if (locations
== NULL
)
1686 status
= nfs4_proc_fs_locations(dir
, name
, locations
, page
);
1689 /* Make sure server returned a different fsid for the referral */
1690 if (nfs_fsid_equal(&NFS_SERVER(dir
)->fsid
, &locations
->fattr
.fsid
)) {
1691 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__
, name
->name
);
1696 memcpy(fattr
, &locations
->fattr
, sizeof(struct nfs_fattr
));
1697 fattr
->valid
|= NFS_ATTR_FATTR_V4_REFERRAL
;
1699 fattr
->mode
= S_IFDIR
;
1700 memset(fhandle
, 0, sizeof(struct nfs_fh
));
1709 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1711 struct nfs4_getattr_arg args
= {
1713 .bitmask
= server
->attr_bitmask
,
1715 struct nfs4_getattr_res res
= {
1719 struct rpc_message msg
= {
1720 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETATTR
],
1725 nfs_fattr_init(fattr
);
1726 return rpc_call_sync(server
->client
, &msg
, 0);
1729 static int nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1731 struct nfs4_exception exception
= { };
1734 err
= nfs4_handle_exception(server
,
1735 _nfs4_proc_getattr(server
, fhandle
, fattr
),
1737 } while (exception
.retry
);
1742 * The file is not closed if it is opened due to the a request to change
1743 * the size of the file. The open call will not be needed once the
1744 * VFS layer lookup-intents are implemented.
1746 * Close is called when the inode is destroyed.
1747 * If we haven't opened the file for O_WRONLY, we
1748 * need to in the size_change case to obtain a stateid.
1751 * Because OPEN is always done by name in nfsv4, it is
1752 * possible that we opened a different file by the same
1753 * name. We can recognize this race condition, but we
1754 * can't do anything about it besides returning an error.
1756 * This will be fixed with VFS changes (lookup-intent).
1759 nfs4_proc_setattr(struct dentry
*dentry
, struct nfs_fattr
*fattr
,
1760 struct iattr
*sattr
)
1762 struct inode
*inode
= dentry
->d_inode
;
1763 struct rpc_cred
*cred
= NULL
;
1764 struct nfs4_state
*state
= NULL
;
1767 nfs_fattr_init(fattr
);
1769 /* Search for an existing open(O_WRITE) file */
1770 if (sattr
->ia_valid
& ATTR_FILE
) {
1771 struct nfs_open_context
*ctx
;
1773 ctx
= nfs_file_open_context(sattr
->ia_file
);
1780 status
= nfs4_do_setattr(inode
, cred
, fattr
, sattr
, state
);
1782 nfs_setattr_update_inode(inode
, sattr
);
1786 static int _nfs4_proc_lookupfh(struct nfs_server
*server
, const struct nfs_fh
*dirfh
,
1787 const struct qstr
*name
, struct nfs_fh
*fhandle
,
1788 struct nfs_fattr
*fattr
)
1791 struct nfs4_lookup_arg args
= {
1792 .bitmask
= server
->attr_bitmask
,
1796 struct nfs4_lookup_res res
= {
1801 struct rpc_message msg
= {
1802 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP
],
1807 nfs_fattr_init(fattr
);
1809 dprintk("NFS call lookupfh %s\n", name
->name
);
1810 status
= rpc_call_sync(server
->client
, &msg
, 0);
1811 dprintk("NFS reply lookupfh: %d\n", status
);
1815 static int nfs4_proc_lookupfh(struct nfs_server
*server
, struct nfs_fh
*dirfh
,
1816 struct qstr
*name
, struct nfs_fh
*fhandle
,
1817 struct nfs_fattr
*fattr
)
1819 struct nfs4_exception exception
= { };
1822 err
= _nfs4_proc_lookupfh(server
, dirfh
, name
, fhandle
, fattr
);
1824 if (err
== -NFS4ERR_MOVED
) {
1828 err
= nfs4_handle_exception(server
, err
, &exception
);
1829 } while (exception
.retry
);
1833 static int _nfs4_proc_lookup(struct inode
*dir
, const struct qstr
*name
,
1834 struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1838 dprintk("NFS call lookup %s\n", name
->name
);
1839 status
= _nfs4_proc_lookupfh(NFS_SERVER(dir
), NFS_FH(dir
), name
, fhandle
, fattr
);
1840 if (status
== -NFS4ERR_MOVED
)
1841 status
= nfs4_get_referral(dir
, name
, fattr
, fhandle
);
1842 dprintk("NFS reply lookup: %d\n", status
);
1846 static int nfs4_proc_lookup(struct inode
*dir
, struct qstr
*name
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1848 struct nfs4_exception exception
= { };
1851 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1852 _nfs4_proc_lookup(dir
, name
, fhandle
, fattr
),
1854 } while (exception
.retry
);
1858 static int _nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
1860 struct nfs_server
*server
= NFS_SERVER(inode
);
1861 struct nfs_fattr fattr
;
1862 struct nfs4_accessargs args
= {
1863 .fh
= NFS_FH(inode
),
1864 .bitmask
= server
->attr_bitmask
,
1866 struct nfs4_accessres res
= {
1870 struct rpc_message msg
= {
1871 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_ACCESS
],
1874 .rpc_cred
= entry
->cred
,
1876 int mode
= entry
->mask
;
1880 * Determine which access bits we want to ask for...
1882 if (mode
& MAY_READ
)
1883 args
.access
|= NFS4_ACCESS_READ
;
1884 if (S_ISDIR(inode
->i_mode
)) {
1885 if (mode
& MAY_WRITE
)
1886 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
;
1887 if (mode
& MAY_EXEC
)
1888 args
.access
|= NFS4_ACCESS_LOOKUP
;
1890 if (mode
& MAY_WRITE
)
1891 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
;
1892 if (mode
& MAY_EXEC
)
1893 args
.access
|= NFS4_ACCESS_EXECUTE
;
1895 nfs_fattr_init(&fattr
);
1896 status
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
1899 if (res
.access
& NFS4_ACCESS_READ
)
1900 entry
->mask
|= MAY_READ
;
1901 if (res
.access
& (NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
))
1902 entry
->mask
|= MAY_WRITE
;
1903 if (res
.access
& (NFS4_ACCESS_LOOKUP
|NFS4_ACCESS_EXECUTE
))
1904 entry
->mask
|= MAY_EXEC
;
1905 nfs_refresh_inode(inode
, &fattr
);
1910 static int nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
1912 struct nfs4_exception exception
= { };
1915 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1916 _nfs4_proc_access(inode
, entry
),
1918 } while (exception
.retry
);
1923 * TODO: For the time being, we don't try to get any attributes
1924 * along with any of the zero-copy operations READ, READDIR,
1927 * In the case of the first three, we want to put the GETATTR
1928 * after the read-type operation -- this is because it is hard
1929 * to predict the length of a GETATTR response in v4, and thus
1930 * align the READ data correctly. This means that the GETATTR
1931 * may end up partially falling into the page cache, and we should
1932 * shift it into the 'tail' of the xdr_buf before processing.
1933 * To do this efficiently, we need to know the total length
1934 * of data received, which doesn't seem to be available outside
1937 * In the case of WRITE, we also want to put the GETATTR after
1938 * the operation -- in this case because we want to make sure
1939 * we get the post-operation mtime and size. This means that
1940 * we can't use xdr_encode_pages() as written: we need a variant
1941 * of it which would leave room in the 'tail' iovec.
1943 * Both of these changes to the XDR layer would in fact be quite
1944 * minor, but I decided to leave them for a subsequent patch.
1946 static int _nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
1947 unsigned int pgbase
, unsigned int pglen
)
1949 struct nfs4_readlink args
= {
1950 .fh
= NFS_FH(inode
),
1955 struct rpc_message msg
= {
1956 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READLINK
],
1961 return rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
1964 static int nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
1965 unsigned int pgbase
, unsigned int pglen
)
1967 struct nfs4_exception exception
= { };
1970 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1971 _nfs4_proc_readlink(inode
, page
, pgbase
, pglen
),
1973 } while (exception
.retry
);
1979 * We will need to arrange for the VFS layer to provide an atomic open.
1980 * Until then, this create/open method is prone to inefficiency and race
1981 * conditions due to the lookup, create, and open VFS calls from sys_open()
1982 * placed on the wire.
1984 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1985 * The file will be opened again in the subsequent VFS open call
1986 * (nfs4_proc_file_open).
1988 * The open for read will just hang around to be used by any process that
1989 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1993 nfs4_proc_create(struct inode
*dir
, struct dentry
*dentry
, struct iattr
*sattr
,
1994 int flags
, struct nameidata
*nd
)
1996 struct path path
= {
1997 .mnt
= nd
->path
.mnt
,
2000 struct nfs4_state
*state
;
2001 struct rpc_cred
*cred
;
2002 fmode_t fmode
= flags
& (FMODE_READ
| FMODE_WRITE
);
2005 cred
= rpc_lookup_cred();
2007 status
= PTR_ERR(cred
);
2010 state
= nfs4_do_open(dir
, &path
, fmode
, flags
, sattr
, cred
);
2012 if (IS_ERR(state
)) {
2013 status
= PTR_ERR(state
);
2016 d_add(dentry
, igrab(state
->inode
));
2017 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
2018 if (flags
& O_EXCL
) {
2019 struct nfs_fattr fattr
;
2020 status
= nfs4_do_setattr(state
->inode
, cred
, &fattr
, sattr
, state
);
2022 nfs_setattr_update_inode(state
->inode
, sattr
);
2023 nfs_post_op_update_inode(state
->inode
, &fattr
);
2025 if (status
== 0 && (nd
->flags
& LOOKUP_OPEN
) != 0)
2026 status
= nfs4_intent_set_file(nd
, &path
, state
, fmode
);
2028 nfs4_close_sync(&path
, state
, fmode
);
2035 static int _nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
2037 struct nfs_server
*server
= NFS_SERVER(dir
);
2038 struct nfs_removeargs args
= {
2040 .name
.len
= name
->len
,
2041 .name
.name
= name
->name
,
2042 .bitmask
= server
->attr_bitmask
,
2044 struct nfs_removeres res
= {
2047 struct rpc_message msg
= {
2048 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
],
2054 nfs_fattr_init(&res
.dir_attr
);
2055 status
= rpc_call_sync(server
->client
, &msg
, 0);
2057 update_changeattr(dir
, &res
.cinfo
);
2058 nfs_post_op_update_inode(dir
, &res
.dir_attr
);
2063 static int nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
2065 struct nfs4_exception exception
= { };
2068 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2069 _nfs4_proc_remove(dir
, name
),
2071 } while (exception
.retry
);
2075 static void nfs4_proc_unlink_setup(struct rpc_message
*msg
, struct inode
*dir
)
2077 struct nfs_server
*server
= NFS_SERVER(dir
);
2078 struct nfs_removeargs
*args
= msg
->rpc_argp
;
2079 struct nfs_removeres
*res
= msg
->rpc_resp
;
2081 args
->bitmask
= server
->attr_bitmask
;
2082 res
->server
= server
;
2083 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
];
2086 static int nfs4_proc_unlink_done(struct rpc_task
*task
, struct inode
*dir
)
2088 struct nfs_removeres
*res
= task
->tk_msg
.rpc_resp
;
2090 if (nfs4_async_handle_error(task
, res
->server
, NULL
) == -EAGAIN
)
2092 update_changeattr(dir
, &res
->cinfo
);
2093 nfs_post_op_update_inode(dir
, &res
->dir_attr
);
2097 static int _nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2098 struct inode
*new_dir
, struct qstr
*new_name
)
2100 struct nfs_server
*server
= NFS_SERVER(old_dir
);
2101 struct nfs4_rename_arg arg
= {
2102 .old_dir
= NFS_FH(old_dir
),
2103 .new_dir
= NFS_FH(new_dir
),
2104 .old_name
= old_name
,
2105 .new_name
= new_name
,
2106 .bitmask
= server
->attr_bitmask
,
2108 struct nfs_fattr old_fattr
, new_fattr
;
2109 struct nfs4_rename_res res
= {
2111 .old_fattr
= &old_fattr
,
2112 .new_fattr
= &new_fattr
,
2114 struct rpc_message msg
= {
2115 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENAME
],
2121 nfs_fattr_init(res
.old_fattr
);
2122 nfs_fattr_init(res
.new_fattr
);
2123 status
= rpc_call_sync(server
->client
, &msg
, 0);
2126 update_changeattr(old_dir
, &res
.old_cinfo
);
2127 nfs_post_op_update_inode(old_dir
, res
.old_fattr
);
2128 update_changeattr(new_dir
, &res
.new_cinfo
);
2129 nfs_post_op_update_inode(new_dir
, res
.new_fattr
);
2134 static int nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2135 struct inode
*new_dir
, struct qstr
*new_name
)
2137 struct nfs4_exception exception
= { };
2140 err
= nfs4_handle_exception(NFS_SERVER(old_dir
),
2141 _nfs4_proc_rename(old_dir
, old_name
,
2144 } while (exception
.retry
);
2148 static int _nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2150 struct nfs_server
*server
= NFS_SERVER(inode
);
2151 struct nfs4_link_arg arg
= {
2152 .fh
= NFS_FH(inode
),
2153 .dir_fh
= NFS_FH(dir
),
2155 .bitmask
= server
->attr_bitmask
,
2157 struct nfs_fattr fattr
, dir_attr
;
2158 struct nfs4_link_res res
= {
2161 .dir_attr
= &dir_attr
,
2163 struct rpc_message msg
= {
2164 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LINK
],
2170 nfs_fattr_init(res
.fattr
);
2171 nfs_fattr_init(res
.dir_attr
);
2172 status
= rpc_call_sync(server
->client
, &msg
, 0);
2174 update_changeattr(dir
, &res
.cinfo
);
2175 nfs_post_op_update_inode(dir
, res
.dir_attr
);
2176 nfs_post_op_update_inode(inode
, res
.fattr
);
2182 static int nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2184 struct nfs4_exception exception
= { };
2187 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2188 _nfs4_proc_link(inode
, dir
, name
),
2190 } while (exception
.retry
);
2194 struct nfs4_createdata
{
2195 struct rpc_message msg
;
2196 struct nfs4_create_arg arg
;
2197 struct nfs4_create_res res
;
2199 struct nfs_fattr fattr
;
2200 struct nfs_fattr dir_fattr
;
2203 static struct nfs4_createdata
*nfs4_alloc_createdata(struct inode
*dir
,
2204 struct qstr
*name
, struct iattr
*sattr
, u32 ftype
)
2206 struct nfs4_createdata
*data
;
2208 data
= kzalloc(sizeof(*data
), GFP_KERNEL
);
2210 struct nfs_server
*server
= NFS_SERVER(dir
);
2212 data
->msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
];
2213 data
->msg
.rpc_argp
= &data
->arg
;
2214 data
->msg
.rpc_resp
= &data
->res
;
2215 data
->arg
.dir_fh
= NFS_FH(dir
);
2216 data
->arg
.server
= server
;
2217 data
->arg
.name
= name
;
2218 data
->arg
.attrs
= sattr
;
2219 data
->arg
.ftype
= ftype
;
2220 data
->arg
.bitmask
= server
->attr_bitmask
;
2221 data
->res
.server
= server
;
2222 data
->res
.fh
= &data
->fh
;
2223 data
->res
.fattr
= &data
->fattr
;
2224 data
->res
.dir_fattr
= &data
->dir_fattr
;
2225 nfs_fattr_init(data
->res
.fattr
);
2226 nfs_fattr_init(data
->res
.dir_fattr
);
2231 static int nfs4_do_create(struct inode
*dir
, struct dentry
*dentry
, struct nfs4_createdata
*data
)
2233 int status
= rpc_call_sync(NFS_CLIENT(dir
), &data
->msg
, 0);
2235 update_changeattr(dir
, &data
->res
.dir_cinfo
);
2236 nfs_post_op_update_inode(dir
, data
->res
.dir_fattr
);
2237 status
= nfs_instantiate(dentry
, data
->res
.fh
, data
->res
.fattr
);
2242 static void nfs4_free_createdata(struct nfs4_createdata
*data
)
2247 static int _nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2248 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2250 struct nfs4_createdata
*data
;
2251 int status
= -ENAMETOOLONG
;
2253 if (len
> NFS4_MAXPATHLEN
)
2257 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4LNK
);
2261 data
->msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SYMLINK
];
2262 data
->arg
.u
.symlink
.pages
= &page
;
2263 data
->arg
.u
.symlink
.len
= len
;
2265 status
= nfs4_do_create(dir
, dentry
, data
);
2267 nfs4_free_createdata(data
);
2272 static int nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2273 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2275 struct nfs4_exception exception
= { };
2278 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2279 _nfs4_proc_symlink(dir
, dentry
, page
,
2282 } while (exception
.retry
);
2286 static int _nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2287 struct iattr
*sattr
)
2289 struct nfs4_createdata
*data
;
2290 int status
= -ENOMEM
;
2292 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4DIR
);
2296 status
= nfs4_do_create(dir
, dentry
, data
);
2298 nfs4_free_createdata(data
);
2303 static int nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2304 struct iattr
*sattr
)
2306 struct nfs4_exception exception
= { };
2309 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2310 _nfs4_proc_mkdir(dir
, dentry
, sattr
),
2312 } while (exception
.retry
);
2316 static int _nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2317 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2319 struct inode
*dir
= dentry
->d_inode
;
2320 struct nfs4_readdir_arg args
= {
2325 .bitmask
= NFS_SERVER(dentry
->d_inode
)->attr_bitmask
,
2327 struct nfs4_readdir_res res
;
2328 struct rpc_message msg
= {
2329 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READDIR
],
2336 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__
,
2337 dentry
->d_parent
->d_name
.name
,
2338 dentry
->d_name
.name
,
2339 (unsigned long long)cookie
);
2340 nfs4_setup_readdir(cookie
, NFS_COOKIEVERF(dir
), dentry
, &args
);
2341 res
.pgbase
= args
.pgbase
;
2342 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
2344 memcpy(NFS_COOKIEVERF(dir
), res
.verifier
.data
, NFS4_VERIFIER_SIZE
);
2346 nfs_invalidate_atime(dir
);
2348 dprintk("%s: returns %d\n", __func__
, status
);
2352 static int nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2353 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2355 struct nfs4_exception exception
= { };
2358 err
= nfs4_handle_exception(NFS_SERVER(dentry
->d_inode
),
2359 _nfs4_proc_readdir(dentry
, cred
, cookie
,
2362 } while (exception
.retry
);
2366 static int _nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2367 struct iattr
*sattr
, dev_t rdev
)
2369 struct nfs4_createdata
*data
;
2370 int mode
= sattr
->ia_mode
;
2371 int status
= -ENOMEM
;
2373 BUG_ON(!(sattr
->ia_valid
& ATTR_MODE
));
2374 BUG_ON(!S_ISFIFO(mode
) && !S_ISBLK(mode
) && !S_ISCHR(mode
) && !S_ISSOCK(mode
));
2376 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4SOCK
);
2381 data
->arg
.ftype
= NF4FIFO
;
2382 else if (S_ISBLK(mode
)) {
2383 data
->arg
.ftype
= NF4BLK
;
2384 data
->arg
.u
.device
.specdata1
= MAJOR(rdev
);
2385 data
->arg
.u
.device
.specdata2
= MINOR(rdev
);
2387 else if (S_ISCHR(mode
)) {
2388 data
->arg
.ftype
= NF4CHR
;
2389 data
->arg
.u
.device
.specdata1
= MAJOR(rdev
);
2390 data
->arg
.u
.device
.specdata2
= MINOR(rdev
);
2393 status
= nfs4_do_create(dir
, dentry
, data
);
2395 nfs4_free_createdata(data
);
2400 static int nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2401 struct iattr
*sattr
, dev_t rdev
)
2403 struct nfs4_exception exception
= { };
2406 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2407 _nfs4_proc_mknod(dir
, dentry
, sattr
, rdev
),
2409 } while (exception
.retry
);
2413 static int _nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2414 struct nfs_fsstat
*fsstat
)
2416 struct nfs4_statfs_arg args
= {
2418 .bitmask
= server
->attr_bitmask
,
2420 struct rpc_message msg
= {
2421 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_STATFS
],
2426 nfs_fattr_init(fsstat
->fattr
);
2427 return rpc_call_sync(server
->client
, &msg
, 0);
2430 static int nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsstat
*fsstat
)
2432 struct nfs4_exception exception
= { };
2435 err
= nfs4_handle_exception(server
,
2436 _nfs4_proc_statfs(server
, fhandle
, fsstat
),
2438 } while (exception
.retry
);
2442 static int _nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2443 struct nfs_fsinfo
*fsinfo
)
2445 struct nfs4_fsinfo_arg args
= {
2447 .bitmask
= server
->attr_bitmask
,
2449 struct rpc_message msg
= {
2450 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FSINFO
],
2455 return rpc_call_sync(server
->client
, &msg
, 0);
2458 static int nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2460 struct nfs4_exception exception
= { };
2464 err
= nfs4_handle_exception(server
,
2465 _nfs4_do_fsinfo(server
, fhandle
, fsinfo
),
2467 } while (exception
.retry
);
2471 static int nfs4_proc_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2473 nfs_fattr_init(fsinfo
->fattr
);
2474 return nfs4_do_fsinfo(server
, fhandle
, fsinfo
);
2477 static int _nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2478 struct nfs_pathconf
*pathconf
)
2480 struct nfs4_pathconf_arg args
= {
2482 .bitmask
= server
->attr_bitmask
,
2484 struct rpc_message msg
= {
2485 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_PATHCONF
],
2487 .rpc_resp
= pathconf
,
2490 /* None of the pathconf attributes are mandatory to implement */
2491 if ((args
.bitmask
[0] & nfs4_pathconf_bitmap
[0]) == 0) {
2492 memset(pathconf
, 0, sizeof(*pathconf
));
2496 nfs_fattr_init(pathconf
->fattr
);
2497 return rpc_call_sync(server
->client
, &msg
, 0);
2500 static int nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2501 struct nfs_pathconf
*pathconf
)
2503 struct nfs4_exception exception
= { };
2507 err
= nfs4_handle_exception(server
,
2508 _nfs4_proc_pathconf(server
, fhandle
, pathconf
),
2510 } while (exception
.retry
);
2514 static int nfs4_read_done(struct rpc_task
*task
, struct nfs_read_data
*data
)
2516 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2518 if (nfs4_async_handle_error(task
, server
, data
->args
.context
->state
) == -EAGAIN
) {
2519 rpc_restart_call(task
);
2523 nfs_invalidate_atime(data
->inode
);
2524 if (task
->tk_status
> 0)
2525 renew_lease(server
, data
->timestamp
);
2529 static void nfs4_proc_read_setup(struct nfs_read_data
*data
, struct rpc_message
*msg
)
2531 data
->timestamp
= jiffies
;
2532 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READ
];
2535 static int nfs4_write_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
2537 struct inode
*inode
= data
->inode
;
2539 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
), data
->args
.context
->state
) == -EAGAIN
) {
2540 rpc_restart_call(task
);
2543 if (task
->tk_status
>= 0) {
2544 renew_lease(NFS_SERVER(inode
), data
->timestamp
);
2545 nfs_post_op_update_inode_force_wcc(inode
, data
->res
.fattr
);
2550 static void nfs4_proc_write_setup(struct nfs_write_data
*data
, struct rpc_message
*msg
)
2552 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2554 data
->args
.bitmask
= server
->attr_bitmask
;
2555 data
->res
.server
= server
;
2556 data
->timestamp
= jiffies
;
2558 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_WRITE
];
2561 static int nfs4_commit_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
2563 struct inode
*inode
= data
->inode
;
2565 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
), NULL
) == -EAGAIN
) {
2566 rpc_restart_call(task
);
2569 nfs_refresh_inode(inode
, data
->res
.fattr
);
2573 static void nfs4_proc_commit_setup(struct nfs_write_data
*data
, struct rpc_message
*msg
)
2575 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2577 data
->args
.bitmask
= server
->attr_bitmask
;
2578 data
->res
.server
= server
;
2579 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_COMMIT
];
2583 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2584 * standalone procedure for queueing an asynchronous RENEW.
2586 static void nfs4_renew_done(struct rpc_task
*task
, void *data
)
2588 struct nfs_client
*clp
= (struct nfs_client
*)task
->tk_msg
.rpc_argp
;
2589 unsigned long timestamp
= (unsigned long)data
;
2591 if (task
->tk_status
< 0) {
2592 switch (task
->tk_status
) {
2593 case -NFS4ERR_STALE_CLIENTID
:
2594 case -NFS4ERR_EXPIRED
:
2595 case -NFS4ERR_CB_PATH_DOWN
:
2596 nfs4_schedule_state_recovery(clp
);
2600 spin_lock(&clp
->cl_lock
);
2601 if (time_before(clp
->cl_last_renewal
,timestamp
))
2602 clp
->cl_last_renewal
= timestamp
;
2603 spin_unlock(&clp
->cl_lock
);
2606 static const struct rpc_call_ops nfs4_renew_ops
= {
2607 .rpc_call_done
= nfs4_renew_done
,
2610 int nfs4_proc_async_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2612 struct rpc_message msg
= {
2613 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2618 return rpc_call_async(clp
->cl_rpcclient
, &msg
, RPC_TASK_SOFT
,
2619 &nfs4_renew_ops
, (void *)jiffies
);
2622 int nfs4_proc_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2624 struct rpc_message msg
= {
2625 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2629 unsigned long now
= jiffies
;
2632 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2635 spin_lock(&clp
->cl_lock
);
2636 if (time_before(clp
->cl_last_renewal
,now
))
2637 clp
->cl_last_renewal
= now
;
2638 spin_unlock(&clp
->cl_lock
);
2642 static inline int nfs4_server_supports_acls(struct nfs_server
*server
)
2644 return (server
->caps
& NFS_CAP_ACLS
)
2645 && (server
->acl_bitmask
& ACL4_SUPPORT_ALLOW_ACL
)
2646 && (server
->acl_bitmask
& ACL4_SUPPORT_DENY_ACL
);
2649 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2650 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2653 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2655 static void buf_to_pages(const void *buf
, size_t buflen
,
2656 struct page
**pages
, unsigned int *pgbase
)
2658 const void *p
= buf
;
2660 *pgbase
= offset_in_page(buf
);
2662 while (p
< buf
+ buflen
) {
2663 *(pages
++) = virt_to_page(p
);
2664 p
+= PAGE_CACHE_SIZE
;
2668 struct nfs4_cached_acl
{
2674 static void nfs4_set_cached_acl(struct inode
*inode
, struct nfs4_cached_acl
*acl
)
2676 struct nfs_inode
*nfsi
= NFS_I(inode
);
2678 spin_lock(&inode
->i_lock
);
2679 kfree(nfsi
->nfs4_acl
);
2680 nfsi
->nfs4_acl
= acl
;
2681 spin_unlock(&inode
->i_lock
);
2684 static void nfs4_zap_acl_attr(struct inode
*inode
)
2686 nfs4_set_cached_acl(inode
, NULL
);
2689 static inline ssize_t
nfs4_read_cached_acl(struct inode
*inode
, char *buf
, size_t buflen
)
2691 struct nfs_inode
*nfsi
= NFS_I(inode
);
2692 struct nfs4_cached_acl
*acl
;
2695 spin_lock(&inode
->i_lock
);
2696 acl
= nfsi
->nfs4_acl
;
2699 if (buf
== NULL
) /* user is just asking for length */
2701 if (acl
->cached
== 0)
2703 ret
= -ERANGE
; /* see getxattr(2) man page */
2704 if (acl
->len
> buflen
)
2706 memcpy(buf
, acl
->data
, acl
->len
);
2710 spin_unlock(&inode
->i_lock
);
2714 static void nfs4_write_cached_acl(struct inode
*inode
, const char *buf
, size_t acl_len
)
2716 struct nfs4_cached_acl
*acl
;
2718 if (buf
&& acl_len
<= PAGE_SIZE
) {
2719 acl
= kmalloc(sizeof(*acl
) + acl_len
, GFP_KERNEL
);
2723 memcpy(acl
->data
, buf
, acl_len
);
2725 acl
= kmalloc(sizeof(*acl
), GFP_KERNEL
);
2732 nfs4_set_cached_acl(inode
, acl
);
2735 static ssize_t
__nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
2737 struct page
*pages
[NFS4ACL_MAXPAGES
];
2738 struct nfs_getaclargs args
= {
2739 .fh
= NFS_FH(inode
),
2743 size_t resp_len
= buflen
;
2745 struct rpc_message msg
= {
2746 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETACL
],
2748 .rpc_resp
= &resp_len
,
2750 struct page
*localpage
= NULL
;
2753 if (buflen
< PAGE_SIZE
) {
2754 /* As long as we're doing a round trip to the server anyway,
2755 * let's be prepared for a page of acl data. */
2756 localpage
= alloc_page(GFP_KERNEL
);
2757 resp_buf
= page_address(localpage
);
2758 if (localpage
== NULL
)
2760 args
.acl_pages
[0] = localpage
;
2761 args
.acl_pgbase
= 0;
2762 resp_len
= args
.acl_len
= PAGE_SIZE
;
2765 buf_to_pages(buf
, buflen
, args
.acl_pages
, &args
.acl_pgbase
);
2767 ret
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
2770 if (resp_len
> args
.acl_len
)
2771 nfs4_write_cached_acl(inode
, NULL
, resp_len
);
2773 nfs4_write_cached_acl(inode
, resp_buf
, resp_len
);
2776 if (resp_len
> buflen
)
2779 memcpy(buf
, resp_buf
, resp_len
);
2784 __free_page(localpage
);
2788 static ssize_t
nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
2790 struct nfs4_exception exception
= { };
2793 ret
= __nfs4_get_acl_uncached(inode
, buf
, buflen
);
2796 ret
= nfs4_handle_exception(NFS_SERVER(inode
), ret
, &exception
);
2797 } while (exception
.retry
);
2801 static ssize_t
nfs4_proc_get_acl(struct inode
*inode
, void *buf
, size_t buflen
)
2803 struct nfs_server
*server
= NFS_SERVER(inode
);
2806 if (!nfs4_server_supports_acls(server
))
2808 ret
= nfs_revalidate_inode(server
, inode
);
2811 if (NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ACL
)
2812 nfs_zap_acl_cache(inode
);
2813 ret
= nfs4_read_cached_acl(inode
, buf
, buflen
);
2816 return nfs4_get_acl_uncached(inode
, buf
, buflen
);
2819 static int __nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
2821 struct nfs_server
*server
= NFS_SERVER(inode
);
2822 struct page
*pages
[NFS4ACL_MAXPAGES
];
2823 struct nfs_setaclargs arg
= {
2824 .fh
= NFS_FH(inode
),
2828 struct rpc_message msg
= {
2829 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETACL
],
2835 if (!nfs4_server_supports_acls(server
))
2837 nfs_inode_return_delegation(inode
);
2838 buf_to_pages(buf
, buflen
, arg
.acl_pages
, &arg
.acl_pgbase
);
2839 ret
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
2840 nfs_access_zap_cache(inode
);
2841 nfs_zap_acl_cache(inode
);
2845 static int nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
2847 struct nfs4_exception exception
= { };
2850 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2851 __nfs4_proc_set_acl(inode
, buf
, buflen
),
2853 } while (exception
.retry
);
2858 nfs4_async_handle_error(struct rpc_task
*task
, const struct nfs_server
*server
, struct nfs4_state
*state
)
2860 struct nfs_client
*clp
= server
->nfs_client
;
2862 if (!clp
|| task
->tk_status
>= 0)
2864 switch(task
->tk_status
) {
2865 case -NFS4ERR_ADMIN_REVOKED
:
2866 case -NFS4ERR_BAD_STATEID
:
2867 case -NFS4ERR_OPENMODE
:
2870 nfs4_state_mark_reclaim_nograce(clp
, state
);
2871 case -NFS4ERR_STALE_CLIENTID
:
2872 case -NFS4ERR_STALE_STATEID
:
2873 case -NFS4ERR_EXPIRED
:
2874 rpc_sleep_on(&clp
->cl_rpcwaitq
, task
, NULL
);
2875 nfs4_schedule_state_recovery(clp
);
2876 if (test_bit(NFS4CLNT_MANAGER_RUNNING
, &clp
->cl_state
) == 0)
2877 rpc_wake_up_queued_task(&clp
->cl_rpcwaitq
, task
);
2878 task
->tk_status
= 0;
2880 case -NFS4ERR_DELAY
:
2881 nfs_inc_server_stats(server
, NFSIOS_DELAY
);
2882 case -NFS4ERR_GRACE
:
2883 rpc_delay(task
, NFS4_POLL_RETRY_MAX
);
2884 task
->tk_status
= 0;
2886 case -NFS4ERR_OLD_STATEID
:
2887 task
->tk_status
= 0;
2890 task
->tk_status
= nfs4_map_errors(task
->tk_status
);
2894 int nfs4_proc_setclientid(struct nfs_client
*clp
, u32 program
, unsigned short port
, struct rpc_cred
*cred
)
2896 nfs4_verifier sc_verifier
;
2897 struct nfs4_setclientid setclientid
= {
2898 .sc_verifier
= &sc_verifier
,
2901 struct rpc_message msg
= {
2902 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID
],
2903 .rpc_argp
= &setclientid
,
2911 p
= (__be32
*)sc_verifier
.data
;
2912 *p
++ = htonl((u32
)clp
->cl_boot_time
.tv_sec
);
2913 *p
= htonl((u32
)clp
->cl_boot_time
.tv_nsec
);
2916 setclientid
.sc_name_len
= scnprintf(setclientid
.sc_name
,
2917 sizeof(setclientid
.sc_name
), "%s/%s %s %s %u",
2919 rpc_peeraddr2str(clp
->cl_rpcclient
,
2921 rpc_peeraddr2str(clp
->cl_rpcclient
,
2923 clp
->cl_rpcclient
->cl_auth
->au_ops
->au_name
,
2924 clp
->cl_id_uniquifier
);
2925 setclientid
.sc_netid_len
= scnprintf(setclientid
.sc_netid
,
2926 sizeof(setclientid
.sc_netid
),
2927 rpc_peeraddr2str(clp
->cl_rpcclient
,
2928 RPC_DISPLAY_NETID
));
2929 setclientid
.sc_uaddr_len
= scnprintf(setclientid
.sc_uaddr
,
2930 sizeof(setclientid
.sc_uaddr
), "%s.%u.%u",
2931 clp
->cl_ipaddr
, port
>> 8, port
& 255);
2933 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2934 if (status
!= -NFS4ERR_CLID_INUSE
)
2939 ssleep(clp
->cl_lease_time
+ 1);
2941 if (++clp
->cl_id_uniquifier
== 0)
2947 static int _nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2949 struct nfs_fsinfo fsinfo
;
2950 struct rpc_message msg
= {
2951 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID_CONFIRM
],
2953 .rpc_resp
= &fsinfo
,
2960 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2962 spin_lock(&clp
->cl_lock
);
2963 clp
->cl_lease_time
= fsinfo
.lease_time
* HZ
;
2964 clp
->cl_last_renewal
= now
;
2965 spin_unlock(&clp
->cl_lock
);
2970 int nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2975 err
= _nfs4_proc_setclientid_confirm(clp
, cred
);
2979 case -NFS4ERR_RESOURCE
:
2980 /* The IBM lawyers misread another document! */
2981 case -NFS4ERR_DELAY
:
2982 err
= nfs4_delay(clp
->cl_rpcclient
, &timeout
);
2988 struct nfs4_delegreturndata
{
2989 struct nfs4_delegreturnargs args
;
2990 struct nfs4_delegreturnres res
;
2992 nfs4_stateid stateid
;
2993 unsigned long timestamp
;
2994 struct nfs_fattr fattr
;
2998 static void nfs4_delegreturn_done(struct rpc_task
*task
, void *calldata
)
3000 struct nfs4_delegreturndata
*data
= calldata
;
3001 data
->rpc_status
= task
->tk_status
;
3002 if (data
->rpc_status
== 0)
3003 renew_lease(data
->res
.server
, data
->timestamp
);
3006 static void nfs4_delegreturn_release(void *calldata
)
3011 static const struct rpc_call_ops nfs4_delegreturn_ops
= {
3012 .rpc_call_done
= nfs4_delegreturn_done
,
3013 .rpc_release
= nfs4_delegreturn_release
,
3016 static int _nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
, int issync
)
3018 struct nfs4_delegreturndata
*data
;
3019 struct nfs_server
*server
= NFS_SERVER(inode
);
3020 struct rpc_task
*task
;
3021 struct rpc_message msg
= {
3022 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DELEGRETURN
],
3025 struct rpc_task_setup task_setup_data
= {
3026 .rpc_client
= server
->client
,
3027 .rpc_message
= &msg
,
3028 .callback_ops
= &nfs4_delegreturn_ops
,
3029 .flags
= RPC_TASK_ASYNC
,
3033 data
= kmalloc(sizeof(*data
), GFP_KERNEL
);
3036 data
->args
.fhandle
= &data
->fh
;
3037 data
->args
.stateid
= &data
->stateid
;
3038 data
->args
.bitmask
= server
->attr_bitmask
;
3039 nfs_copy_fh(&data
->fh
, NFS_FH(inode
));
3040 memcpy(&data
->stateid
, stateid
, sizeof(data
->stateid
));
3041 data
->res
.fattr
= &data
->fattr
;
3042 data
->res
.server
= server
;
3043 nfs_fattr_init(data
->res
.fattr
);
3044 data
->timestamp
= jiffies
;
3045 data
->rpc_status
= 0;
3047 task_setup_data
.callback_data
= data
;
3048 msg
.rpc_argp
= &data
->args
,
3049 msg
.rpc_resp
= &data
->res
,
3050 task
= rpc_run_task(&task_setup_data
);
3052 return PTR_ERR(task
);
3055 status
= nfs4_wait_for_completion_rpc_task(task
);
3058 status
= data
->rpc_status
;
3061 nfs_refresh_inode(inode
, &data
->fattr
);
3067 int nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
, int issync
)
3069 struct nfs_server
*server
= NFS_SERVER(inode
);
3070 struct nfs4_exception exception
= { };
3073 err
= _nfs4_proc_delegreturn(inode
, cred
, stateid
, issync
);
3075 case -NFS4ERR_STALE_STATEID
:
3076 case -NFS4ERR_EXPIRED
:
3080 err
= nfs4_handle_exception(server
, err
, &exception
);
3081 } while (exception
.retry
);
3085 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3086 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3089 * sleep, with exponential backoff, and retry the LOCK operation.
3091 static unsigned long
3092 nfs4_set_lock_task_retry(unsigned long timeout
)
3094 schedule_timeout_killable(timeout
);
3096 if (timeout
> NFS4_LOCK_MAXTIMEOUT
)
3097 return NFS4_LOCK_MAXTIMEOUT
;
3101 static int _nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3103 struct inode
*inode
= state
->inode
;
3104 struct nfs_server
*server
= NFS_SERVER(inode
);
3105 struct nfs_client
*clp
= server
->nfs_client
;
3106 struct nfs_lockt_args arg
= {
3107 .fh
= NFS_FH(inode
),
3110 struct nfs_lockt_res res
= {
3113 struct rpc_message msg
= {
3114 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKT
],
3117 .rpc_cred
= state
->owner
->so_cred
,
3119 struct nfs4_lock_state
*lsp
;
3122 arg
.lock_owner
.clientid
= clp
->cl_clientid
;
3123 status
= nfs4_set_lock_state(state
, request
);
3126 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3127 arg
.lock_owner
.id
= lsp
->ls_id
.id
;
3128 status
= rpc_call_sync(server
->client
, &msg
, 0);
3131 request
->fl_type
= F_UNLCK
;
3133 case -NFS4ERR_DENIED
:
3136 request
->fl_ops
->fl_release_private(request
);
3141 static int nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3143 struct nfs4_exception exception
= { };
3147 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3148 _nfs4_proc_getlk(state
, cmd
, request
),
3150 } while (exception
.retry
);
3154 static int do_vfs_lock(struct file
*file
, struct file_lock
*fl
)
3157 switch (fl
->fl_flags
& (FL_POSIX
|FL_FLOCK
)) {
3159 res
= posix_lock_file_wait(file
, fl
);
3162 res
= flock_lock_file_wait(file
, fl
);
3170 struct nfs4_unlockdata
{
3171 struct nfs_locku_args arg
;
3172 struct nfs_locku_res res
;
3173 struct nfs4_lock_state
*lsp
;
3174 struct nfs_open_context
*ctx
;
3175 struct file_lock fl
;
3176 const struct nfs_server
*server
;
3177 unsigned long timestamp
;
3180 static struct nfs4_unlockdata
*nfs4_alloc_unlockdata(struct file_lock
*fl
,
3181 struct nfs_open_context
*ctx
,
3182 struct nfs4_lock_state
*lsp
,
3183 struct nfs_seqid
*seqid
)
3185 struct nfs4_unlockdata
*p
;
3186 struct inode
*inode
= lsp
->ls_state
->inode
;
3188 p
= kmalloc(sizeof(*p
), GFP_KERNEL
);
3191 p
->arg
.fh
= NFS_FH(inode
);
3193 p
->arg
.seqid
= seqid
;
3194 p
->res
.seqid
= seqid
;
3195 p
->arg
.stateid
= &lsp
->ls_stateid
;
3197 atomic_inc(&lsp
->ls_count
);
3198 /* Ensure we don't close file until we're done freeing locks! */
3199 p
->ctx
= get_nfs_open_context(ctx
);
3200 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3201 p
->server
= NFS_SERVER(inode
);
3205 static void nfs4_locku_release_calldata(void *data
)
3207 struct nfs4_unlockdata
*calldata
= data
;
3208 nfs_free_seqid(calldata
->arg
.seqid
);
3209 nfs4_put_lock_state(calldata
->lsp
);
3210 put_nfs_open_context(calldata
->ctx
);
3214 static void nfs4_locku_done(struct rpc_task
*task
, void *data
)
3216 struct nfs4_unlockdata
*calldata
= data
;
3218 if (RPC_ASSASSINATED(task
))
3220 switch (task
->tk_status
) {
3222 memcpy(calldata
->lsp
->ls_stateid
.data
,
3223 calldata
->res
.stateid
.data
,
3224 sizeof(calldata
->lsp
->ls_stateid
.data
));
3225 renew_lease(calldata
->server
, calldata
->timestamp
);
3227 case -NFS4ERR_BAD_STATEID
:
3228 case -NFS4ERR_OLD_STATEID
:
3229 case -NFS4ERR_STALE_STATEID
:
3230 case -NFS4ERR_EXPIRED
:
3233 if (nfs4_async_handle_error(task
, calldata
->server
, NULL
) == -EAGAIN
)
3234 rpc_restart_call(task
);
3238 static void nfs4_locku_prepare(struct rpc_task
*task
, void *data
)
3240 struct nfs4_unlockdata
*calldata
= data
;
3242 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
3244 if ((calldata
->lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) == 0) {
3245 /* Note: exit _without_ running nfs4_locku_done */
3246 task
->tk_action
= NULL
;
3249 calldata
->timestamp
= jiffies
;
3250 rpc_call_start(task
);
3253 static const struct rpc_call_ops nfs4_locku_ops
= {
3254 .rpc_call_prepare
= nfs4_locku_prepare
,
3255 .rpc_call_done
= nfs4_locku_done
,
3256 .rpc_release
= nfs4_locku_release_calldata
,
3259 static struct rpc_task
*nfs4_do_unlck(struct file_lock
*fl
,
3260 struct nfs_open_context
*ctx
,
3261 struct nfs4_lock_state
*lsp
,
3262 struct nfs_seqid
*seqid
)
3264 struct nfs4_unlockdata
*data
;
3265 struct rpc_message msg
= {
3266 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKU
],
3267 .rpc_cred
= ctx
->cred
,
3269 struct rpc_task_setup task_setup_data
= {
3270 .rpc_client
= NFS_CLIENT(lsp
->ls_state
->inode
),
3271 .rpc_message
= &msg
,
3272 .callback_ops
= &nfs4_locku_ops
,
3273 .workqueue
= nfsiod_workqueue
,
3274 .flags
= RPC_TASK_ASYNC
,
3277 /* Ensure this is an unlock - when canceling a lock, the
3278 * canceled lock is passed in, and it won't be an unlock.
3280 fl
->fl_type
= F_UNLCK
;
3282 data
= nfs4_alloc_unlockdata(fl
, ctx
, lsp
, seqid
);
3284 nfs_free_seqid(seqid
);
3285 return ERR_PTR(-ENOMEM
);
3288 msg
.rpc_argp
= &data
->arg
,
3289 msg
.rpc_resp
= &data
->res
,
3290 task_setup_data
.callback_data
= data
;
3291 return rpc_run_task(&task_setup_data
);
3294 static int nfs4_proc_unlck(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3296 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
3297 struct nfs_seqid
*seqid
;
3298 struct nfs4_lock_state
*lsp
;
3299 struct rpc_task
*task
;
3301 unsigned char fl_flags
= request
->fl_flags
;
3303 status
= nfs4_set_lock_state(state
, request
);
3304 /* Unlock _before_ we do the RPC call */
3305 request
->fl_flags
|= FL_EXISTS
;
3306 down_read(&nfsi
->rwsem
);
3307 if (do_vfs_lock(request
->fl_file
, request
) == -ENOENT
) {
3308 up_read(&nfsi
->rwsem
);
3311 up_read(&nfsi
->rwsem
);
3314 /* Is this a delegated lock? */
3315 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
3317 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3318 seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3322 task
= nfs4_do_unlck(request
, nfs_file_open_context(request
->fl_file
), lsp
, seqid
);
3323 status
= PTR_ERR(task
);
3326 status
= nfs4_wait_for_completion_rpc_task(task
);
3329 request
->fl_flags
= fl_flags
;
3333 struct nfs4_lockdata
{
3334 struct nfs_lock_args arg
;
3335 struct nfs_lock_res res
;
3336 struct nfs4_lock_state
*lsp
;
3337 struct nfs_open_context
*ctx
;
3338 struct file_lock fl
;
3339 unsigned long timestamp
;
3344 static struct nfs4_lockdata
*nfs4_alloc_lockdata(struct file_lock
*fl
,
3345 struct nfs_open_context
*ctx
, struct nfs4_lock_state
*lsp
)
3347 struct nfs4_lockdata
*p
;
3348 struct inode
*inode
= lsp
->ls_state
->inode
;
3349 struct nfs_server
*server
= NFS_SERVER(inode
);
3351 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
3355 p
->arg
.fh
= NFS_FH(inode
);
3357 p
->arg
.open_seqid
= nfs_alloc_seqid(&lsp
->ls_state
->owner
->so_seqid
);
3358 if (p
->arg
.open_seqid
== NULL
)
3360 p
->arg
.lock_seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3361 if (p
->arg
.lock_seqid
== NULL
)
3362 goto out_free_seqid
;
3363 p
->arg
.lock_stateid
= &lsp
->ls_stateid
;
3364 p
->arg
.lock_owner
.clientid
= server
->nfs_client
->cl_clientid
;
3365 p
->arg
.lock_owner
.id
= lsp
->ls_id
.id
;
3366 p
->res
.lock_seqid
= p
->arg
.lock_seqid
;
3368 atomic_inc(&lsp
->ls_count
);
3369 p
->ctx
= get_nfs_open_context(ctx
);
3370 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3373 nfs_free_seqid(p
->arg
.open_seqid
);
3379 static void nfs4_lock_prepare(struct rpc_task
*task
, void *calldata
)
3381 struct nfs4_lockdata
*data
= calldata
;
3382 struct nfs4_state
*state
= data
->lsp
->ls_state
;
3384 dprintk("%s: begin!\n", __func__
);
3385 if (nfs_wait_on_sequence(data
->arg
.lock_seqid
, task
) != 0)
3387 /* Do we need to do an open_to_lock_owner? */
3388 if (!(data
->arg
.lock_seqid
->sequence
->flags
& NFS_SEQID_CONFIRMED
)) {
3389 if (nfs_wait_on_sequence(data
->arg
.open_seqid
, task
) != 0)
3391 data
->arg
.open_stateid
= &state
->stateid
;
3392 data
->arg
.new_lock_owner
= 1;
3393 data
->res
.open_seqid
= data
->arg
.open_seqid
;
3395 data
->arg
.new_lock_owner
= 0;
3396 data
->timestamp
= jiffies
;
3397 rpc_call_start(task
);
3398 dprintk("%s: done!, ret = %d\n", __func__
, data
->rpc_status
);
3401 static void nfs4_lock_done(struct rpc_task
*task
, void *calldata
)
3403 struct nfs4_lockdata
*data
= calldata
;
3405 dprintk("%s: begin!\n", __func__
);
3407 data
->rpc_status
= task
->tk_status
;
3408 if (RPC_ASSASSINATED(task
))
3410 if (data
->arg
.new_lock_owner
!= 0) {
3411 if (data
->rpc_status
== 0)
3412 nfs_confirm_seqid(&data
->lsp
->ls_seqid
, 0);
3416 if (data
->rpc_status
== 0) {
3417 memcpy(data
->lsp
->ls_stateid
.data
, data
->res
.stateid
.data
,
3418 sizeof(data
->lsp
->ls_stateid
.data
));
3419 data
->lsp
->ls_flags
|= NFS_LOCK_INITIALIZED
;
3420 renew_lease(NFS_SERVER(data
->ctx
->path
.dentry
->d_inode
), data
->timestamp
);
3423 dprintk("%s: done, ret = %d!\n", __func__
, data
->rpc_status
);
3426 static void nfs4_lock_release(void *calldata
)
3428 struct nfs4_lockdata
*data
= calldata
;
3430 dprintk("%s: begin!\n", __func__
);
3431 nfs_free_seqid(data
->arg
.open_seqid
);
3432 if (data
->cancelled
!= 0) {
3433 struct rpc_task
*task
;
3434 task
= nfs4_do_unlck(&data
->fl
, data
->ctx
, data
->lsp
,
3435 data
->arg
.lock_seqid
);
3438 dprintk("%s: cancelling lock!\n", __func__
);
3440 nfs_free_seqid(data
->arg
.lock_seqid
);
3441 nfs4_put_lock_state(data
->lsp
);
3442 put_nfs_open_context(data
->ctx
);
3444 dprintk("%s: done!\n", __func__
);
3447 static const struct rpc_call_ops nfs4_lock_ops
= {
3448 .rpc_call_prepare
= nfs4_lock_prepare
,
3449 .rpc_call_done
= nfs4_lock_done
,
3450 .rpc_release
= nfs4_lock_release
,
3453 static int _nfs4_do_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*fl
, int reclaim
)
3455 struct nfs4_lockdata
*data
;
3456 struct rpc_task
*task
;
3457 struct rpc_message msg
= {
3458 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCK
],
3459 .rpc_cred
= state
->owner
->so_cred
,
3461 struct rpc_task_setup task_setup_data
= {
3462 .rpc_client
= NFS_CLIENT(state
->inode
),
3463 .rpc_message
= &msg
,
3464 .callback_ops
= &nfs4_lock_ops
,
3465 .workqueue
= nfsiod_workqueue
,
3466 .flags
= RPC_TASK_ASYNC
,
3470 dprintk("%s: begin!\n", __func__
);
3471 data
= nfs4_alloc_lockdata(fl
, nfs_file_open_context(fl
->fl_file
),
3472 fl
->fl_u
.nfs4_fl
.owner
);
3476 data
->arg
.block
= 1;
3478 data
->arg
.reclaim
= 1;
3479 msg
.rpc_argp
= &data
->arg
,
3480 msg
.rpc_resp
= &data
->res
,
3481 task_setup_data
.callback_data
= data
;
3482 task
= rpc_run_task(&task_setup_data
);
3484 return PTR_ERR(task
);
3485 ret
= nfs4_wait_for_completion_rpc_task(task
);
3487 ret
= data
->rpc_status
;
3488 if (ret
== -NFS4ERR_DENIED
)
3491 data
->cancelled
= 1;
3493 dprintk("%s: done, ret = %d!\n", __func__
, ret
);
3497 static int nfs4_lock_reclaim(struct nfs4_state
*state
, struct file_lock
*request
)
3499 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3500 struct nfs4_exception exception
= { };
3504 /* Cache the lock if possible... */
3505 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
3507 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 1);
3508 if (err
!= -NFS4ERR_DELAY
)
3510 nfs4_handle_exception(server
, err
, &exception
);
3511 } while (exception
.retry
);
3515 static int nfs4_lock_expired(struct nfs4_state
*state
, struct file_lock
*request
)
3517 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3518 struct nfs4_exception exception
= { };
3521 err
= nfs4_set_lock_state(state
, request
);
3525 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
3527 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 0);
3528 if (err
!= -NFS4ERR_DELAY
)
3530 nfs4_handle_exception(server
, err
, &exception
);
3531 } while (exception
.retry
);
3535 static int _nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3537 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
3538 unsigned char fl_flags
= request
->fl_flags
;
3541 /* Is this a delegated open? */
3542 status
= nfs4_set_lock_state(state
, request
);
3545 request
->fl_flags
|= FL_ACCESS
;
3546 status
= do_vfs_lock(request
->fl_file
, request
);
3549 down_read(&nfsi
->rwsem
);
3550 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
)) {
3551 /* Yes: cache locks! */
3552 /* ...but avoid races with delegation recall... */
3553 request
->fl_flags
= fl_flags
& ~FL_SLEEP
;
3554 status
= do_vfs_lock(request
->fl_file
, request
);
3557 status
= _nfs4_do_setlk(state
, cmd
, request
, 0);
3560 /* Note: we always want to sleep here! */
3561 request
->fl_flags
= fl_flags
| FL_SLEEP
;
3562 if (do_vfs_lock(request
->fl_file
, request
) < 0)
3563 printk(KERN_WARNING
"%s: VFS is out of sync with lock manager!\n", __func__
);
3565 up_read(&nfsi
->rwsem
);
3567 request
->fl_flags
= fl_flags
;
3571 static int nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3573 struct nfs4_exception exception
= { };
3577 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3578 _nfs4_proc_setlk(state
, cmd
, request
),
3580 } while (exception
.retry
);
3585 nfs4_proc_lock(struct file
*filp
, int cmd
, struct file_lock
*request
)
3587 struct nfs_open_context
*ctx
;
3588 struct nfs4_state
*state
;
3589 unsigned long timeout
= NFS4_LOCK_MINTIMEOUT
;
3592 /* verify open state */
3593 ctx
= nfs_file_open_context(filp
);
3596 if (request
->fl_start
< 0 || request
->fl_end
< 0)
3600 return nfs4_proc_getlk(state
, F_GETLK
, request
);
3602 if (!(IS_SETLK(cmd
) || IS_SETLKW(cmd
)))
3605 if (request
->fl_type
== F_UNLCK
)
3606 return nfs4_proc_unlck(state
, cmd
, request
);
3609 status
= nfs4_proc_setlk(state
, cmd
, request
);
3610 if ((status
!= -EAGAIN
) || IS_SETLK(cmd
))
3612 timeout
= nfs4_set_lock_task_retry(timeout
);
3613 status
= -ERESTARTSYS
;
3616 } while(status
< 0);
3620 int nfs4_lock_delegation_recall(struct nfs4_state
*state
, struct file_lock
*fl
)
3622 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3623 struct nfs4_exception exception
= { };
3626 err
= nfs4_set_lock_state(state
, fl
);
3630 err
= _nfs4_do_setlk(state
, F_SETLK
, fl
, 0);
3631 if (err
!= -NFS4ERR_DELAY
)
3633 err
= nfs4_handle_exception(server
, err
, &exception
);
3634 } while (exception
.retry
);
3639 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3641 int nfs4_setxattr(struct dentry
*dentry
, const char *key
, const void *buf
,
3642 size_t buflen
, int flags
)
3644 struct inode
*inode
= dentry
->d_inode
;
3646 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
3649 return nfs4_proc_set_acl(inode
, buf
, buflen
);
3652 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3653 * and that's what we'll do for e.g. user attributes that haven't been set.
3654 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3655 * attributes in kernel-managed attribute namespaces. */
3656 ssize_t
nfs4_getxattr(struct dentry
*dentry
, const char *key
, void *buf
,
3659 struct inode
*inode
= dentry
->d_inode
;
3661 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
3664 return nfs4_proc_get_acl(inode
, buf
, buflen
);
3667 ssize_t
nfs4_listxattr(struct dentry
*dentry
, char *buf
, size_t buflen
)
3669 size_t len
= strlen(XATTR_NAME_NFSV4_ACL
) + 1;
3671 if (!nfs4_server_supports_acls(NFS_SERVER(dentry
->d_inode
)))
3673 if (buf
&& buflen
< len
)
3676 memcpy(buf
, XATTR_NAME_NFSV4_ACL
, len
);
3680 int nfs4_proc_fs_locations(struct inode
*dir
, const struct qstr
*name
,
3681 struct nfs4_fs_locations
*fs_locations
, struct page
*page
)
3683 struct nfs_server
*server
= NFS_SERVER(dir
);
3685 [0] = FATTR4_WORD0_FSID
| FATTR4_WORD0_FS_LOCATIONS
,
3686 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID
,
3688 struct nfs4_fs_locations_arg args
= {
3689 .dir_fh
= NFS_FH(dir
),
3694 struct rpc_message msg
= {
3695 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FS_LOCATIONS
],
3697 .rpc_resp
= fs_locations
,
3701 dprintk("%s: start\n", __func__
);
3702 nfs_fattr_init(&fs_locations
->fattr
);
3703 fs_locations
->server
= server
;
3704 fs_locations
->nlocations
= 0;
3705 status
= rpc_call_sync(server
->client
, &msg
, 0);
3706 dprintk("%s: returned status = %d\n", __func__
, status
);
3710 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops
= {
3711 .owner_flag_bit
= NFS_OWNER_RECLAIM_REBOOT
,
3712 .state_flag_bit
= NFS_STATE_RECLAIM_REBOOT
,
3713 .recover_open
= nfs4_open_reclaim
,
3714 .recover_lock
= nfs4_lock_reclaim
,
3717 struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops
= {
3718 .owner_flag_bit
= NFS_OWNER_RECLAIM_NOGRACE
,
3719 .state_flag_bit
= NFS_STATE_RECLAIM_NOGRACE
,
3720 .recover_open
= nfs4_open_expired
,
3721 .recover_lock
= nfs4_lock_expired
,
3724 static const struct inode_operations nfs4_file_inode_operations
= {
3725 .permission
= nfs_permission
,
3726 .getattr
= nfs_getattr
,
3727 .setattr
= nfs_setattr
,
3728 .getxattr
= nfs4_getxattr
,
3729 .setxattr
= nfs4_setxattr
,
3730 .listxattr
= nfs4_listxattr
,
3733 const struct nfs_rpc_ops nfs_v4_clientops
= {
3734 .version
= 4, /* protocol version */
3735 .dentry_ops
= &nfs4_dentry_operations
,
3736 .dir_inode_ops
= &nfs4_dir_inode_operations
,
3737 .file_inode_ops
= &nfs4_file_inode_operations
,
3738 .getroot
= nfs4_proc_get_root
,
3739 .getattr
= nfs4_proc_getattr
,
3740 .setattr
= nfs4_proc_setattr
,
3741 .lookupfh
= nfs4_proc_lookupfh
,
3742 .lookup
= nfs4_proc_lookup
,
3743 .access
= nfs4_proc_access
,
3744 .readlink
= nfs4_proc_readlink
,
3745 .create
= nfs4_proc_create
,
3746 .remove
= nfs4_proc_remove
,
3747 .unlink_setup
= nfs4_proc_unlink_setup
,
3748 .unlink_done
= nfs4_proc_unlink_done
,
3749 .rename
= nfs4_proc_rename
,
3750 .link
= nfs4_proc_link
,
3751 .symlink
= nfs4_proc_symlink
,
3752 .mkdir
= nfs4_proc_mkdir
,
3753 .rmdir
= nfs4_proc_remove
,
3754 .readdir
= nfs4_proc_readdir
,
3755 .mknod
= nfs4_proc_mknod
,
3756 .statfs
= nfs4_proc_statfs
,
3757 .fsinfo
= nfs4_proc_fsinfo
,
3758 .pathconf
= nfs4_proc_pathconf
,
3759 .set_capabilities
= nfs4_server_capabilities
,
3760 .decode_dirent
= nfs4_decode_dirent
,
3761 .read_setup
= nfs4_proc_read_setup
,
3762 .read_done
= nfs4_read_done
,
3763 .write_setup
= nfs4_proc_write_setup
,
3764 .write_done
= nfs4_write_done
,
3765 .commit_setup
= nfs4_proc_commit_setup
,
3766 .commit_done
= nfs4_commit_done
,
3767 .lock
= nfs4_proc_lock
,
3768 .clear_acl_cache
= nfs4_zap_acl_attr
,