4 * Client-side procedure declarations for NFSv4.
6 * Copyright (c) 2002 The Regents of the University of Michigan.
9 * Kendrick Smith <kmsmith@umich.edu>
10 * Andy Adamson <andros@umich.edu>
12 * Redistribution and use in source and binary forms, with or without
13 * modification, are permitted provided that the following conditions
16 * 1. Redistributions of source code must retain the above copyright
17 * notice, this list of conditions and the following disclaimer.
18 * 2. Redistributions in binary form must reproduce the above copyright
19 * notice, this list of conditions and the following disclaimer in the
20 * documentation and/or other materials provided with the distribution.
21 * 3. Neither the name of the University nor the names of its
22 * contributors may be used to endorse or promote products derived
23 * from this software without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
26 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
27 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
28 * DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
30 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
31 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
32 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
33 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
34 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
35 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
39 #include <linux/utsname.h>
40 #include <linux/delay.h>
41 #include <linux/errno.h>
42 #include <linux/string.h>
43 #include <linux/sunrpc/clnt.h>
44 #include <linux/nfs.h>
45 #include <linux/nfs4.h>
46 #include <linux/nfs_fs.h>
47 #include <linux/nfs_page.h>
48 #include <linux/smp_lock.h>
49 #include <linux/namei.h>
50 #include <linux/mount.h>
53 #include "delegation.h"
57 #define NFSDBG_FACILITY NFSDBG_PROC
59 #define NFS4_POLL_RETRY_MIN (HZ/10)
60 #define NFS4_POLL_RETRY_MAX (15*HZ)
63 static int _nfs4_proc_open(struct nfs4_opendata
*data
);
64 static int nfs4_do_fsinfo(struct nfs_server
*, struct nfs_fh
*, struct nfs_fsinfo
*);
65 static int nfs4_async_handle_error(struct rpc_task
*, const struct nfs_server
*, struct nfs4_state
*);
66 static int _nfs4_proc_lookup(struct inode
*dir
, const struct qstr
*name
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
);
67 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
);
69 /* Prevent leaks of NFSv4 errors into userland */
70 static int nfs4_map_errors(int err
)
73 dprintk("%s could not handle NFSv4 error %d\n",
81 * This is our standard bitmap for GETATTR requests.
83 const u32 nfs4_fattr_bitmap
[2] = {
88 | FATTR4_WORD0_FILEID
,
90 | FATTR4_WORD1_NUMLINKS
92 | FATTR4_WORD1_OWNER_GROUP
94 | FATTR4_WORD1_SPACE_USED
95 | FATTR4_WORD1_TIME_ACCESS
96 | FATTR4_WORD1_TIME_METADATA
97 | FATTR4_WORD1_TIME_MODIFY
100 const u32 nfs4_statfs_bitmap
[2] = {
101 FATTR4_WORD0_FILES_AVAIL
102 | FATTR4_WORD0_FILES_FREE
103 | FATTR4_WORD0_FILES_TOTAL
,
104 FATTR4_WORD1_SPACE_AVAIL
105 | FATTR4_WORD1_SPACE_FREE
106 | FATTR4_WORD1_SPACE_TOTAL
109 const u32 nfs4_pathconf_bitmap
[2] = {
111 | FATTR4_WORD0_MAXNAME
,
115 const u32 nfs4_fsinfo_bitmap
[2] = { FATTR4_WORD0_MAXFILESIZE
116 | FATTR4_WORD0_MAXREAD
117 | FATTR4_WORD0_MAXWRITE
118 | FATTR4_WORD0_LEASE_TIME
,
122 const u32 nfs4_fs_locations_bitmap
[2] = {
124 | FATTR4_WORD0_CHANGE
127 | FATTR4_WORD0_FILEID
128 | FATTR4_WORD0_FS_LOCATIONS
,
130 | FATTR4_WORD1_NUMLINKS
132 | FATTR4_WORD1_OWNER_GROUP
133 | FATTR4_WORD1_RAWDEV
134 | FATTR4_WORD1_SPACE_USED
135 | FATTR4_WORD1_TIME_ACCESS
136 | FATTR4_WORD1_TIME_METADATA
137 | FATTR4_WORD1_TIME_MODIFY
138 | FATTR4_WORD1_MOUNTED_ON_FILEID
141 static void nfs4_setup_readdir(u64 cookie
, __be32
*verifier
, struct dentry
*dentry
,
142 struct nfs4_readdir_arg
*readdir
)
146 BUG_ON(readdir
->count
< 80);
148 readdir
->cookie
= cookie
;
149 memcpy(&readdir
->verifier
, verifier
, sizeof(readdir
->verifier
));
154 memset(&readdir
->verifier
, 0, sizeof(readdir
->verifier
));
159 * NFSv4 servers do not return entries for '.' and '..'
160 * Therefore, we fake these entries here. We let '.'
161 * have cookie 0 and '..' have cookie 1. Note that
162 * when talking to the server, we always send cookie 0
165 start
= p
= kmap_atomic(*readdir
->pages
, KM_USER0
);
168 *p
++ = xdr_one
; /* next */
169 *p
++ = xdr_zero
; /* cookie, first word */
170 *p
++ = xdr_one
; /* cookie, second word */
171 *p
++ = xdr_one
; /* entry len */
172 memcpy(p
, ".\0\0\0", 4); /* entry */
174 *p
++ = xdr_one
; /* bitmap length */
175 *p
++ = htonl(FATTR4_WORD0_FILEID
); /* bitmap */
176 *p
++ = htonl(8); /* attribute buffer length */
177 p
= xdr_encode_hyper(p
, NFS_FILEID(dentry
->d_inode
));
180 *p
++ = xdr_one
; /* next */
181 *p
++ = xdr_zero
; /* cookie, first word */
182 *p
++ = xdr_two
; /* cookie, second word */
183 *p
++ = xdr_two
; /* entry len */
184 memcpy(p
, "..\0\0", 4); /* entry */
186 *p
++ = xdr_one
; /* bitmap length */
187 *p
++ = htonl(FATTR4_WORD0_FILEID
); /* bitmap */
188 *p
++ = htonl(8); /* attribute buffer length */
189 p
= xdr_encode_hyper(p
, NFS_FILEID(dentry
->d_parent
->d_inode
));
191 readdir
->pgbase
= (char *)p
- (char *)start
;
192 readdir
->count
-= readdir
->pgbase
;
193 kunmap_atomic(start
, KM_USER0
);
196 static int nfs4_wait_clnt_recover(struct nfs_client
*clp
)
202 res
= wait_on_bit(&clp
->cl_state
, NFS4CLNT_MANAGER_RUNNING
,
203 nfs_wait_bit_killable
, TASK_KILLABLE
);
207 static int nfs4_delay(struct rpc_clnt
*clnt
, long *timeout
)
214 *timeout
= NFS4_POLL_RETRY_MIN
;
215 if (*timeout
> NFS4_POLL_RETRY_MAX
)
216 *timeout
= NFS4_POLL_RETRY_MAX
;
217 schedule_timeout_killable(*timeout
);
218 if (fatal_signal_pending(current
))
224 /* This is the error handling routine for processes that are allowed
227 static int nfs4_handle_exception(const struct nfs_server
*server
, int errorcode
, struct nfs4_exception
*exception
)
229 struct nfs_client
*clp
= server
->nfs_client
;
230 struct nfs4_state
*state
= exception
->state
;
233 exception
->retry
= 0;
237 case -NFS4ERR_ADMIN_REVOKED
:
238 case -NFS4ERR_BAD_STATEID
:
239 case -NFS4ERR_OPENMODE
:
242 nfs4_state_mark_reclaim_nograce(clp
, state
);
243 case -NFS4ERR_STALE_CLIENTID
:
244 case -NFS4ERR_STALE_STATEID
:
245 case -NFS4ERR_EXPIRED
:
246 nfs4_schedule_state_recovery(clp
);
247 ret
= nfs4_wait_clnt_recover(clp
);
249 exception
->retry
= 1;
251 case -NFS4ERR_FILE_OPEN
:
254 ret
= nfs4_delay(server
->client
, &exception
->timeout
);
257 case -NFS4ERR_OLD_STATEID
:
258 exception
->retry
= 1;
260 /* We failed to handle the error */
261 return nfs4_map_errors(ret
);
265 static void renew_lease(const struct nfs_server
*server
, unsigned long timestamp
)
267 struct nfs_client
*clp
= server
->nfs_client
;
268 spin_lock(&clp
->cl_lock
);
269 if (time_before(clp
->cl_last_renewal
,timestamp
))
270 clp
->cl_last_renewal
= timestamp
;
271 spin_unlock(&clp
->cl_lock
);
274 #if defined(CONFIG_NFS_V4_1)
276 int _nfs4_call_sync_session(struct nfs_server
*server
,
277 struct rpc_message
*msg
,
278 struct nfs4_sequence_args
*args
,
279 struct nfs4_sequence_res
*res
,
282 /* in preparation for setting up the sequence op */
283 return rpc_call_sync(server
->client
, msg
, 0);
286 #endif /* CONFIG_NFS_V4_1 */
288 int _nfs4_call_sync(struct nfs_server
*server
,
289 struct rpc_message
*msg
,
290 struct nfs4_sequence_args
*args
,
291 struct nfs4_sequence_res
*res
,
294 args
->sa_session
= res
->sr_session
= NULL
;
295 return rpc_call_sync(server
->client
, msg
, 0);
298 #define nfs4_call_sync(server, msg, args, res, cache_reply) \
299 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
300 &(res)->seq_res, (cache_reply))
302 static void update_changeattr(struct inode
*dir
, struct nfs4_change_info
*cinfo
)
304 struct nfs_inode
*nfsi
= NFS_I(dir
);
306 spin_lock(&dir
->i_lock
);
307 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
|NFS_INO_INVALID_DATA
;
308 if (!cinfo
->atomic
|| cinfo
->before
!= nfsi
->change_attr
)
309 nfs_force_lookup_revalidate(dir
);
310 nfsi
->change_attr
= cinfo
->after
;
311 spin_unlock(&dir
->i_lock
);
314 struct nfs4_opendata
{
316 struct nfs_openargs o_arg
;
317 struct nfs_openres o_res
;
318 struct nfs_open_confirmargs c_arg
;
319 struct nfs_open_confirmres c_res
;
320 struct nfs_fattr f_attr
;
321 struct nfs_fattr dir_attr
;
324 struct nfs4_state_owner
*owner
;
325 struct nfs4_state
*state
;
327 unsigned long timestamp
;
328 unsigned int rpc_done
: 1;
334 static void nfs4_init_opendata_res(struct nfs4_opendata
*p
)
336 p
->o_res
.f_attr
= &p
->f_attr
;
337 p
->o_res
.dir_attr
= &p
->dir_attr
;
338 p
->o_res
.seqid
= p
->o_arg
.seqid
;
339 p
->c_res
.seqid
= p
->c_arg
.seqid
;
340 p
->o_res
.server
= p
->o_arg
.server
;
341 nfs_fattr_init(&p
->f_attr
);
342 nfs_fattr_init(&p
->dir_attr
);
345 static struct nfs4_opendata
*nfs4_opendata_alloc(struct path
*path
,
346 struct nfs4_state_owner
*sp
, fmode_t fmode
, int flags
,
347 const struct iattr
*attrs
)
349 struct dentry
*parent
= dget_parent(path
->dentry
);
350 struct inode
*dir
= parent
->d_inode
;
351 struct nfs_server
*server
= NFS_SERVER(dir
);
352 struct nfs4_opendata
*p
;
354 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
357 p
->o_arg
.seqid
= nfs_alloc_seqid(&sp
->so_seqid
);
358 if (p
->o_arg
.seqid
== NULL
)
360 p
->path
.mnt
= mntget(path
->mnt
);
361 p
->path
.dentry
= dget(path
->dentry
);
364 atomic_inc(&sp
->so_count
);
365 p
->o_arg
.fh
= NFS_FH(dir
);
366 p
->o_arg
.open_flags
= flags
;
367 p
->o_arg
.fmode
= fmode
& (FMODE_READ
|FMODE_WRITE
);
368 p
->o_arg
.clientid
= server
->nfs_client
->cl_clientid
;
369 p
->o_arg
.id
= sp
->so_owner_id
.id
;
370 p
->o_arg
.name
= &p
->path
.dentry
->d_name
;
371 p
->o_arg
.server
= server
;
372 p
->o_arg
.bitmask
= server
->attr_bitmask
;
373 p
->o_arg
.claim
= NFS4_OPEN_CLAIM_NULL
;
374 if (flags
& O_EXCL
) {
375 u32
*s
= (u32
*) p
->o_arg
.u
.verifier
.data
;
378 } else if (flags
& O_CREAT
) {
379 p
->o_arg
.u
.attrs
= &p
->attrs
;
380 memcpy(&p
->attrs
, attrs
, sizeof(p
->attrs
));
382 p
->c_arg
.fh
= &p
->o_res
.fh
;
383 p
->c_arg
.stateid
= &p
->o_res
.stateid
;
384 p
->c_arg
.seqid
= p
->o_arg
.seqid
;
385 nfs4_init_opendata_res(p
);
395 static void nfs4_opendata_free(struct kref
*kref
)
397 struct nfs4_opendata
*p
= container_of(kref
,
398 struct nfs4_opendata
, kref
);
400 nfs_free_seqid(p
->o_arg
.seqid
);
401 if (p
->state
!= NULL
)
402 nfs4_put_open_state(p
->state
);
403 nfs4_put_state_owner(p
->owner
);
409 static void nfs4_opendata_put(struct nfs4_opendata
*p
)
412 kref_put(&p
->kref
, nfs4_opendata_free
);
415 static int nfs4_wait_for_completion_rpc_task(struct rpc_task
*task
)
419 ret
= rpc_wait_for_completion_task(task
);
423 static int can_open_cached(struct nfs4_state
*state
, fmode_t mode
, int open_mode
)
427 if (open_mode
& O_EXCL
)
429 switch (mode
& (FMODE_READ
|FMODE_WRITE
)) {
431 ret
|= test_bit(NFS_O_RDONLY_STATE
, &state
->flags
) != 0;
434 ret
|= test_bit(NFS_O_WRONLY_STATE
, &state
->flags
) != 0;
436 case FMODE_READ
|FMODE_WRITE
:
437 ret
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
) != 0;
443 static int can_open_delegated(struct nfs_delegation
*delegation
, fmode_t fmode
)
445 if ((delegation
->type
& fmode
) != fmode
)
447 if (test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
))
449 nfs_mark_delegation_referenced(delegation
);
453 static void update_open_stateflags(struct nfs4_state
*state
, fmode_t fmode
)
462 case FMODE_READ
|FMODE_WRITE
:
465 nfs4_state_set_mode_locked(state
, state
->state
| fmode
);
468 static void nfs_set_open_stateid_locked(struct nfs4_state
*state
, nfs4_stateid
*stateid
, fmode_t fmode
)
470 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0)
471 memcpy(state
->stateid
.data
, stateid
->data
, sizeof(state
->stateid
.data
));
472 memcpy(state
->open_stateid
.data
, stateid
->data
, sizeof(state
->open_stateid
.data
));
475 set_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
478 set_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
480 case FMODE_READ
|FMODE_WRITE
:
481 set_bit(NFS_O_RDWR_STATE
, &state
->flags
);
485 static void nfs_set_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*stateid
, fmode_t fmode
)
487 write_seqlock(&state
->seqlock
);
488 nfs_set_open_stateid_locked(state
, stateid
, fmode
);
489 write_sequnlock(&state
->seqlock
);
492 static void __update_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*open_stateid
, const nfs4_stateid
*deleg_stateid
, fmode_t fmode
)
495 * Protect the call to nfs4_state_set_mode_locked and
496 * serialise the stateid update
498 write_seqlock(&state
->seqlock
);
499 if (deleg_stateid
!= NULL
) {
500 memcpy(state
->stateid
.data
, deleg_stateid
->data
, sizeof(state
->stateid
.data
));
501 set_bit(NFS_DELEGATED_STATE
, &state
->flags
);
503 if (open_stateid
!= NULL
)
504 nfs_set_open_stateid_locked(state
, open_stateid
, fmode
);
505 write_sequnlock(&state
->seqlock
);
506 spin_lock(&state
->owner
->so_lock
);
507 update_open_stateflags(state
, fmode
);
508 spin_unlock(&state
->owner
->so_lock
);
511 static int update_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*open_stateid
, nfs4_stateid
*delegation
, fmode_t fmode
)
513 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
514 struct nfs_delegation
*deleg_cur
;
517 fmode
&= (FMODE_READ
|FMODE_WRITE
);
520 deleg_cur
= rcu_dereference(nfsi
->delegation
);
521 if (deleg_cur
== NULL
)
524 spin_lock(&deleg_cur
->lock
);
525 if (nfsi
->delegation
!= deleg_cur
||
526 (deleg_cur
->type
& fmode
) != fmode
)
527 goto no_delegation_unlock
;
529 if (delegation
== NULL
)
530 delegation
= &deleg_cur
->stateid
;
531 else if (memcmp(deleg_cur
->stateid
.data
, delegation
->data
, NFS4_STATEID_SIZE
) != 0)
532 goto no_delegation_unlock
;
534 nfs_mark_delegation_referenced(deleg_cur
);
535 __update_open_stateid(state
, open_stateid
, &deleg_cur
->stateid
, fmode
);
537 no_delegation_unlock
:
538 spin_unlock(&deleg_cur
->lock
);
542 if (!ret
&& open_stateid
!= NULL
) {
543 __update_open_stateid(state
, open_stateid
, NULL
, fmode
);
551 static void nfs4_return_incompatible_delegation(struct inode
*inode
, fmode_t fmode
)
553 struct nfs_delegation
*delegation
;
556 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
557 if (delegation
== NULL
|| (delegation
->type
& fmode
) == fmode
) {
562 nfs_inode_return_delegation(inode
);
565 static struct nfs4_state
*nfs4_try_open_cached(struct nfs4_opendata
*opendata
)
567 struct nfs4_state
*state
= opendata
->state
;
568 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
569 struct nfs_delegation
*delegation
;
570 int open_mode
= opendata
->o_arg
.open_flags
& O_EXCL
;
571 fmode_t fmode
= opendata
->o_arg
.fmode
;
572 nfs4_stateid stateid
;
576 if (can_open_cached(state
, fmode
, open_mode
)) {
577 spin_lock(&state
->owner
->so_lock
);
578 if (can_open_cached(state
, fmode
, open_mode
)) {
579 update_open_stateflags(state
, fmode
);
580 spin_unlock(&state
->owner
->so_lock
);
581 goto out_return_state
;
583 spin_unlock(&state
->owner
->so_lock
);
586 delegation
= rcu_dereference(nfsi
->delegation
);
587 if (delegation
== NULL
||
588 !can_open_delegated(delegation
, fmode
)) {
592 /* Save the delegation */
593 memcpy(stateid
.data
, delegation
->stateid
.data
, sizeof(stateid
.data
));
595 ret
= nfs_may_open(state
->inode
, state
->owner
->so_cred
, open_mode
);
600 /* Try to update the stateid using the delegation */
601 if (update_open_stateid(state
, NULL
, &stateid
, fmode
))
602 goto out_return_state
;
607 atomic_inc(&state
->count
);
611 static struct nfs4_state
*nfs4_opendata_to_nfs4_state(struct nfs4_opendata
*data
)
614 struct nfs4_state
*state
= NULL
;
615 struct nfs_delegation
*delegation
;
618 if (!data
->rpc_done
) {
619 state
= nfs4_try_open_cached(data
);
624 if (!(data
->f_attr
.valid
& NFS_ATTR_FATTR
))
626 inode
= nfs_fhget(data
->dir
->d_sb
, &data
->o_res
.fh
, &data
->f_attr
);
627 ret
= PTR_ERR(inode
);
631 state
= nfs4_get_open_state(inode
, data
->owner
);
634 if (data
->o_res
.delegation_type
!= 0) {
635 int delegation_flags
= 0;
638 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
640 delegation_flags
= delegation
->flags
;
642 if ((delegation_flags
& 1UL<<NFS_DELEGATION_NEED_RECLAIM
) == 0)
643 nfs_inode_set_delegation(state
->inode
,
644 data
->owner
->so_cred
,
647 nfs_inode_reclaim_delegation(state
->inode
,
648 data
->owner
->so_cred
,
652 update_open_stateid(state
, &data
->o_res
.stateid
, NULL
,
663 static struct nfs_open_context
*nfs4_state_find_open_context(struct nfs4_state
*state
)
665 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
666 struct nfs_open_context
*ctx
;
668 spin_lock(&state
->inode
->i_lock
);
669 list_for_each_entry(ctx
, &nfsi
->open_files
, list
) {
670 if (ctx
->state
!= state
)
672 get_nfs_open_context(ctx
);
673 spin_unlock(&state
->inode
->i_lock
);
676 spin_unlock(&state
->inode
->i_lock
);
677 return ERR_PTR(-ENOENT
);
680 static struct nfs4_opendata
*nfs4_open_recoverdata_alloc(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
682 struct nfs4_opendata
*opendata
;
684 opendata
= nfs4_opendata_alloc(&ctx
->path
, state
->owner
, 0, 0, NULL
);
685 if (opendata
== NULL
)
686 return ERR_PTR(-ENOMEM
);
687 opendata
->state
= state
;
688 atomic_inc(&state
->count
);
692 static int nfs4_open_recover_helper(struct nfs4_opendata
*opendata
, fmode_t fmode
, struct nfs4_state
**res
)
694 struct nfs4_state
*newstate
;
697 opendata
->o_arg
.open_flags
= 0;
698 opendata
->o_arg
.fmode
= fmode
;
699 memset(&opendata
->o_res
, 0, sizeof(opendata
->o_res
));
700 memset(&opendata
->c_res
, 0, sizeof(opendata
->c_res
));
701 nfs4_init_opendata_res(opendata
);
702 ret
= _nfs4_proc_open(opendata
);
705 newstate
= nfs4_opendata_to_nfs4_state(opendata
);
706 if (IS_ERR(newstate
))
707 return PTR_ERR(newstate
);
708 nfs4_close_state(&opendata
->path
, newstate
, fmode
);
713 static int nfs4_open_recover(struct nfs4_opendata
*opendata
, struct nfs4_state
*state
)
715 struct nfs4_state
*newstate
;
718 /* memory barrier prior to reading state->n_* */
719 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
721 if (state
->n_rdwr
!= 0) {
722 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
|FMODE_WRITE
, &newstate
);
725 if (newstate
!= state
)
728 if (state
->n_wronly
!= 0) {
729 ret
= nfs4_open_recover_helper(opendata
, FMODE_WRITE
, &newstate
);
732 if (newstate
!= state
)
735 if (state
->n_rdonly
!= 0) {
736 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
, &newstate
);
739 if (newstate
!= state
)
743 * We may have performed cached opens for all three recoveries.
744 * Check if we need to update the current stateid.
746 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0 &&
747 memcmp(state
->stateid
.data
, state
->open_stateid
.data
, sizeof(state
->stateid
.data
)) != 0) {
748 write_seqlock(&state
->seqlock
);
749 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0)
750 memcpy(state
->stateid
.data
, state
->open_stateid
.data
, sizeof(state
->stateid
.data
));
751 write_sequnlock(&state
->seqlock
);
758 * reclaim state on the server after a reboot.
760 static int _nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
762 struct nfs_delegation
*delegation
;
763 struct nfs4_opendata
*opendata
;
764 fmode_t delegation_type
= 0;
767 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
768 if (IS_ERR(opendata
))
769 return PTR_ERR(opendata
);
770 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_PREVIOUS
;
771 opendata
->o_arg
.fh
= NFS_FH(state
->inode
);
773 delegation
= rcu_dereference(NFS_I(state
->inode
)->delegation
);
774 if (delegation
!= NULL
&& test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
) != 0)
775 delegation_type
= delegation
->type
;
777 opendata
->o_arg
.u
.delegation_type
= delegation_type
;
778 status
= nfs4_open_recover(opendata
, state
);
779 nfs4_opendata_put(opendata
);
783 static int nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
785 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
786 struct nfs4_exception exception
= { };
789 err
= _nfs4_do_open_reclaim(ctx
, state
);
790 if (err
!= -NFS4ERR_DELAY
)
792 nfs4_handle_exception(server
, err
, &exception
);
793 } while (exception
.retry
);
797 static int nfs4_open_reclaim(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
799 struct nfs_open_context
*ctx
;
802 ctx
= nfs4_state_find_open_context(state
);
805 ret
= nfs4_do_open_reclaim(ctx
, state
);
806 put_nfs_open_context(ctx
);
810 static int _nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
812 struct nfs4_opendata
*opendata
;
815 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
816 if (IS_ERR(opendata
))
817 return PTR_ERR(opendata
);
818 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_DELEGATE_CUR
;
819 memcpy(opendata
->o_arg
.u
.delegation
.data
, stateid
->data
,
820 sizeof(opendata
->o_arg
.u
.delegation
.data
));
821 ret
= nfs4_open_recover(opendata
, state
);
822 nfs4_opendata_put(opendata
);
826 int nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
828 struct nfs4_exception exception
= { };
829 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
832 err
= _nfs4_open_delegation_recall(ctx
, state
, stateid
);
836 case -NFS4ERR_STALE_CLIENTID
:
837 case -NFS4ERR_STALE_STATEID
:
838 case -NFS4ERR_EXPIRED
:
839 /* Don't recall a delegation if it was lost */
840 nfs4_schedule_state_recovery(server
->nfs_client
);
843 err
= nfs4_handle_exception(server
, err
, &exception
);
844 } while (exception
.retry
);
848 static void nfs4_open_confirm_done(struct rpc_task
*task
, void *calldata
)
850 struct nfs4_opendata
*data
= calldata
;
852 data
->rpc_status
= task
->tk_status
;
853 if (RPC_ASSASSINATED(task
))
855 if (data
->rpc_status
== 0) {
856 memcpy(data
->o_res
.stateid
.data
, data
->c_res
.stateid
.data
,
857 sizeof(data
->o_res
.stateid
.data
));
858 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
859 renew_lease(data
->o_res
.server
, data
->timestamp
);
864 static void nfs4_open_confirm_release(void *calldata
)
866 struct nfs4_opendata
*data
= calldata
;
867 struct nfs4_state
*state
= NULL
;
869 /* If this request hasn't been cancelled, do nothing */
870 if (data
->cancelled
== 0)
872 /* In case of error, no cleanup! */
875 state
= nfs4_opendata_to_nfs4_state(data
);
877 nfs4_close_state(&data
->path
, state
, data
->o_arg
.fmode
);
879 nfs4_opendata_put(data
);
882 static const struct rpc_call_ops nfs4_open_confirm_ops
= {
883 .rpc_call_done
= nfs4_open_confirm_done
,
884 .rpc_release
= nfs4_open_confirm_release
,
888 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
890 static int _nfs4_proc_open_confirm(struct nfs4_opendata
*data
)
892 struct nfs_server
*server
= NFS_SERVER(data
->dir
->d_inode
);
893 struct rpc_task
*task
;
894 struct rpc_message msg
= {
895 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_CONFIRM
],
896 .rpc_argp
= &data
->c_arg
,
897 .rpc_resp
= &data
->c_res
,
898 .rpc_cred
= data
->owner
->so_cred
,
900 struct rpc_task_setup task_setup_data
= {
901 .rpc_client
= server
->client
,
903 .callback_ops
= &nfs4_open_confirm_ops
,
904 .callback_data
= data
,
905 .workqueue
= nfsiod_workqueue
,
906 .flags
= RPC_TASK_ASYNC
,
910 kref_get(&data
->kref
);
912 data
->rpc_status
= 0;
913 data
->timestamp
= jiffies
;
914 task
= rpc_run_task(&task_setup_data
);
916 return PTR_ERR(task
);
917 status
= nfs4_wait_for_completion_rpc_task(task
);
922 status
= data
->rpc_status
;
927 static void nfs4_open_prepare(struct rpc_task
*task
, void *calldata
)
929 struct nfs4_opendata
*data
= calldata
;
930 struct nfs4_state_owner
*sp
= data
->owner
;
932 if (nfs_wait_on_sequence(data
->o_arg
.seqid
, task
) != 0)
935 * Check if we still need to send an OPEN call, or if we can use
936 * a delegation instead.
938 if (data
->state
!= NULL
) {
939 struct nfs_delegation
*delegation
;
941 if (can_open_cached(data
->state
, data
->o_arg
.fmode
, data
->o_arg
.open_flags
))
944 delegation
= rcu_dereference(NFS_I(data
->state
->inode
)->delegation
);
945 if (delegation
!= NULL
&&
946 test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
) == 0) {
952 /* Update sequence id. */
953 data
->o_arg
.id
= sp
->so_owner_id
.id
;
954 data
->o_arg
.clientid
= sp
->so_client
->cl_clientid
;
955 if (data
->o_arg
.claim
== NFS4_OPEN_CLAIM_PREVIOUS
) {
956 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_NOATTR
];
957 nfs_copy_fh(&data
->o_res
.fh
, data
->o_arg
.fh
);
959 data
->timestamp
= jiffies
;
960 rpc_call_start(task
);
963 task
->tk_action
= NULL
;
967 static void nfs4_open_done(struct rpc_task
*task
, void *calldata
)
969 struct nfs4_opendata
*data
= calldata
;
971 data
->rpc_status
= task
->tk_status
;
972 if (RPC_ASSASSINATED(task
))
974 if (task
->tk_status
== 0) {
975 switch (data
->o_res
.f_attr
->mode
& S_IFMT
) {
979 data
->rpc_status
= -ELOOP
;
982 data
->rpc_status
= -EISDIR
;
985 data
->rpc_status
= -ENOTDIR
;
987 renew_lease(data
->o_res
.server
, data
->timestamp
);
988 if (!(data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
))
989 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
994 static void nfs4_open_release(void *calldata
)
996 struct nfs4_opendata
*data
= calldata
;
997 struct nfs4_state
*state
= NULL
;
999 /* If this request hasn't been cancelled, do nothing */
1000 if (data
->cancelled
== 0)
1002 /* In case of error, no cleanup! */
1003 if (data
->rpc_status
!= 0 || !data
->rpc_done
)
1005 /* In case we need an open_confirm, no cleanup! */
1006 if (data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
)
1008 state
= nfs4_opendata_to_nfs4_state(data
);
1010 nfs4_close_state(&data
->path
, state
, data
->o_arg
.fmode
);
1012 nfs4_opendata_put(data
);
1015 static const struct rpc_call_ops nfs4_open_ops
= {
1016 .rpc_call_prepare
= nfs4_open_prepare
,
1017 .rpc_call_done
= nfs4_open_done
,
1018 .rpc_release
= nfs4_open_release
,
1022 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1024 static int _nfs4_proc_open(struct nfs4_opendata
*data
)
1026 struct inode
*dir
= data
->dir
->d_inode
;
1027 struct nfs_server
*server
= NFS_SERVER(dir
);
1028 struct nfs_openargs
*o_arg
= &data
->o_arg
;
1029 struct nfs_openres
*o_res
= &data
->o_res
;
1030 struct rpc_task
*task
;
1031 struct rpc_message msg
= {
1032 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN
],
1035 .rpc_cred
= data
->owner
->so_cred
,
1037 struct rpc_task_setup task_setup_data
= {
1038 .rpc_client
= server
->client
,
1039 .rpc_message
= &msg
,
1040 .callback_ops
= &nfs4_open_ops
,
1041 .callback_data
= data
,
1042 .workqueue
= nfsiod_workqueue
,
1043 .flags
= RPC_TASK_ASYNC
,
1047 kref_get(&data
->kref
);
1049 data
->rpc_status
= 0;
1050 data
->cancelled
= 0;
1051 task
= rpc_run_task(&task_setup_data
);
1053 return PTR_ERR(task
);
1054 status
= nfs4_wait_for_completion_rpc_task(task
);
1056 data
->cancelled
= 1;
1059 status
= data
->rpc_status
;
1061 if (status
!= 0 || !data
->rpc_done
)
1064 if (o_res
->fh
.size
== 0)
1065 _nfs4_proc_lookup(dir
, o_arg
->name
, &o_res
->fh
, o_res
->f_attr
);
1067 if (o_arg
->open_flags
& O_CREAT
) {
1068 update_changeattr(dir
, &o_res
->cinfo
);
1069 nfs_post_op_update_inode(dir
, o_res
->dir_attr
);
1071 nfs_refresh_inode(dir
, o_res
->dir_attr
);
1072 if(o_res
->rflags
& NFS4_OPEN_RESULT_CONFIRM
) {
1073 status
= _nfs4_proc_open_confirm(data
);
1077 if (!(o_res
->f_attr
->valid
& NFS_ATTR_FATTR
))
1078 _nfs4_proc_getattr(server
, &o_res
->fh
, o_res
->f_attr
);
1082 static int nfs4_recover_expired_lease(struct nfs_server
*server
)
1084 struct nfs_client
*clp
= server
->nfs_client
;
1088 ret
= nfs4_wait_clnt_recover(clp
);
1091 if (!test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) &&
1092 !test_bit(NFS4CLNT_CHECK_LEASE
,&clp
->cl_state
))
1094 nfs4_schedule_state_recovery(clp
);
1101 * reclaim state on the server after a network partition.
1102 * Assumes caller holds the appropriate lock
1104 static int _nfs4_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1106 struct nfs4_opendata
*opendata
;
1109 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
1110 if (IS_ERR(opendata
))
1111 return PTR_ERR(opendata
);
1112 ret
= nfs4_open_recover(opendata
, state
);
1114 d_drop(ctx
->path
.dentry
);
1115 nfs4_opendata_put(opendata
);
1119 static inline int nfs4_do_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1121 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1122 struct nfs4_exception exception
= { };
1126 err
= _nfs4_open_expired(ctx
, state
);
1127 if (err
!= -NFS4ERR_DELAY
)
1129 nfs4_handle_exception(server
, err
, &exception
);
1130 } while (exception
.retry
);
1134 static int nfs4_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
1136 struct nfs_open_context
*ctx
;
1139 ctx
= nfs4_state_find_open_context(state
);
1141 return PTR_ERR(ctx
);
1142 ret
= nfs4_do_open_expired(ctx
, state
);
1143 put_nfs_open_context(ctx
);
1148 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1149 * fields corresponding to attributes that were used to store the verifier.
1150 * Make sure we clobber those fields in the later setattr call
1152 static inline void nfs4_exclusive_attrset(struct nfs4_opendata
*opendata
, struct iattr
*sattr
)
1154 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_ACCESS
) &&
1155 !(sattr
->ia_valid
& ATTR_ATIME_SET
))
1156 sattr
->ia_valid
|= ATTR_ATIME
;
1158 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_MODIFY
) &&
1159 !(sattr
->ia_valid
& ATTR_MTIME_SET
))
1160 sattr
->ia_valid
|= ATTR_MTIME
;
1164 * Returns a referenced nfs4_state
1166 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
)
1168 struct nfs4_state_owner
*sp
;
1169 struct nfs4_state
*state
= NULL
;
1170 struct nfs_server
*server
= NFS_SERVER(dir
);
1171 struct nfs4_opendata
*opendata
;
1174 /* Protect against reboot recovery conflicts */
1176 if (!(sp
= nfs4_get_state_owner(server
, cred
))) {
1177 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1180 status
= nfs4_recover_expired_lease(server
);
1182 goto err_put_state_owner
;
1183 if (path
->dentry
->d_inode
!= NULL
)
1184 nfs4_return_incompatible_delegation(path
->dentry
->d_inode
, fmode
);
1186 opendata
= nfs4_opendata_alloc(path
, sp
, fmode
, flags
, sattr
);
1187 if (opendata
== NULL
)
1188 goto err_put_state_owner
;
1190 if (path
->dentry
->d_inode
!= NULL
)
1191 opendata
->state
= nfs4_get_open_state(path
->dentry
->d_inode
, sp
);
1193 status
= _nfs4_proc_open(opendata
);
1195 goto err_opendata_put
;
1197 if (opendata
->o_arg
.open_flags
& O_EXCL
)
1198 nfs4_exclusive_attrset(opendata
, sattr
);
1200 state
= nfs4_opendata_to_nfs4_state(opendata
);
1201 status
= PTR_ERR(state
);
1203 goto err_opendata_put
;
1204 nfs4_opendata_put(opendata
);
1205 nfs4_put_state_owner(sp
);
1209 nfs4_opendata_put(opendata
);
1210 err_put_state_owner
:
1211 nfs4_put_state_owner(sp
);
1218 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
)
1220 struct nfs4_exception exception
= { };
1221 struct nfs4_state
*res
;
1225 status
= _nfs4_do_open(dir
, path
, fmode
, flags
, sattr
, cred
, &res
);
1228 /* NOTE: BAD_SEQID means the server and client disagree about the
1229 * book-keeping w.r.t. state-changing operations
1230 * (OPEN/CLOSE/LOCK/LOCKU...)
1231 * It is actually a sign of a bug on the client or on the server.
1233 * If we receive a BAD_SEQID error in the particular case of
1234 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1235 * have unhashed the old state_owner for us, and that we can
1236 * therefore safely retry using a new one. We should still warn
1237 * the user though...
1239 if (status
== -NFS4ERR_BAD_SEQID
) {
1240 printk(KERN_WARNING
"NFS: v4 server %s "
1241 " returned a bad sequence-id error!\n",
1242 NFS_SERVER(dir
)->nfs_client
->cl_hostname
);
1243 exception
.retry
= 1;
1247 * BAD_STATEID on OPEN means that the server cancelled our
1248 * state before it received the OPEN_CONFIRM.
1249 * Recover by retrying the request as per the discussion
1250 * on Page 181 of RFC3530.
1252 if (status
== -NFS4ERR_BAD_STATEID
) {
1253 exception
.retry
= 1;
1256 if (status
== -EAGAIN
) {
1257 /* We must have found a delegation */
1258 exception
.retry
= 1;
1261 res
= ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir
),
1262 status
, &exception
));
1263 } while (exception
.retry
);
1267 static int _nfs4_do_setattr(struct inode
*inode
, struct rpc_cred
*cred
,
1268 struct nfs_fattr
*fattr
, struct iattr
*sattr
,
1269 struct nfs4_state
*state
)
1271 struct nfs_server
*server
= NFS_SERVER(inode
);
1272 struct nfs_setattrargs arg
= {
1273 .fh
= NFS_FH(inode
),
1276 .bitmask
= server
->attr_bitmask
,
1278 struct nfs_setattrres res
= {
1282 struct rpc_message msg
= {
1283 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETATTR
],
1288 unsigned long timestamp
= jiffies
;
1291 nfs_fattr_init(fattr
);
1293 if (nfs4_copy_delegation_stateid(&arg
.stateid
, inode
)) {
1294 /* Use that stateid */
1295 } else if (state
!= NULL
) {
1296 nfs4_copy_stateid(&arg
.stateid
, state
, current
->files
);
1298 memcpy(&arg
.stateid
, &zero_stateid
, sizeof(arg
.stateid
));
1300 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
1301 if (status
== 0 && state
!= NULL
)
1302 renew_lease(server
, timestamp
);
1306 static int nfs4_do_setattr(struct inode
*inode
, struct rpc_cred
*cred
,
1307 struct nfs_fattr
*fattr
, struct iattr
*sattr
,
1308 struct nfs4_state
*state
)
1310 struct nfs_server
*server
= NFS_SERVER(inode
);
1311 struct nfs4_exception exception
= { };
1314 err
= nfs4_handle_exception(server
,
1315 _nfs4_do_setattr(inode
, cred
, fattr
, sattr
, state
),
1317 } while (exception
.retry
);
1321 struct nfs4_closedata
{
1323 struct inode
*inode
;
1324 struct nfs4_state
*state
;
1325 struct nfs_closeargs arg
;
1326 struct nfs_closeres res
;
1327 struct nfs_fattr fattr
;
1328 unsigned long timestamp
;
1331 static void nfs4_free_closedata(void *data
)
1333 struct nfs4_closedata
*calldata
= data
;
1334 struct nfs4_state_owner
*sp
= calldata
->state
->owner
;
1336 nfs4_put_open_state(calldata
->state
);
1337 nfs_free_seqid(calldata
->arg
.seqid
);
1338 nfs4_put_state_owner(sp
);
1339 path_put(&calldata
->path
);
1343 static void nfs4_close_done(struct rpc_task
*task
, void *data
)
1345 struct nfs4_closedata
*calldata
= data
;
1346 struct nfs4_state
*state
= calldata
->state
;
1347 struct nfs_server
*server
= NFS_SERVER(calldata
->inode
);
1349 if (RPC_ASSASSINATED(task
))
1351 /* hmm. we are done with the inode, and in the process of freeing
1352 * the state_owner. we keep this around to process errors
1354 switch (task
->tk_status
) {
1356 nfs_set_open_stateid(state
, &calldata
->res
.stateid
, 0);
1357 renew_lease(server
, calldata
->timestamp
);
1359 case -NFS4ERR_STALE_STATEID
:
1360 case -NFS4ERR_OLD_STATEID
:
1361 case -NFS4ERR_BAD_STATEID
:
1362 case -NFS4ERR_EXPIRED
:
1363 if (calldata
->arg
.fmode
== 0)
1366 if (nfs4_async_handle_error(task
, server
, state
) == -EAGAIN
) {
1367 rpc_restart_call(task
);
1371 nfs_refresh_inode(calldata
->inode
, calldata
->res
.fattr
);
1374 static void nfs4_close_prepare(struct rpc_task
*task
, void *data
)
1376 struct nfs4_closedata
*calldata
= data
;
1377 struct nfs4_state
*state
= calldata
->state
;
1378 int clear_rd
, clear_wr
, clear_rdwr
;
1380 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
1383 clear_rd
= clear_wr
= clear_rdwr
= 0;
1384 spin_lock(&state
->owner
->so_lock
);
1385 /* Calculate the change in open mode */
1386 if (state
->n_rdwr
== 0) {
1387 if (state
->n_rdonly
== 0) {
1388 clear_rd
|= test_and_clear_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
1389 clear_rdwr
|= test_and_clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1391 if (state
->n_wronly
== 0) {
1392 clear_wr
|= test_and_clear_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
1393 clear_rdwr
|= test_and_clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1396 spin_unlock(&state
->owner
->so_lock
);
1397 if (!clear_rd
&& !clear_wr
&& !clear_rdwr
) {
1398 /* Note: exit _without_ calling nfs4_close_done */
1399 task
->tk_action
= NULL
;
1402 nfs_fattr_init(calldata
->res
.fattr
);
1403 if (test_bit(NFS_O_RDONLY_STATE
, &state
->flags
) != 0) {
1404 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_DOWNGRADE
];
1405 calldata
->arg
.fmode
= FMODE_READ
;
1406 } else if (test_bit(NFS_O_WRONLY_STATE
, &state
->flags
) != 0) {
1407 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_DOWNGRADE
];
1408 calldata
->arg
.fmode
= FMODE_WRITE
;
1410 calldata
->timestamp
= jiffies
;
1411 rpc_call_start(task
);
1414 static const struct rpc_call_ops nfs4_close_ops
= {
1415 .rpc_call_prepare
= nfs4_close_prepare
,
1416 .rpc_call_done
= nfs4_close_done
,
1417 .rpc_release
= nfs4_free_closedata
,
1421 * It is possible for data to be read/written from a mem-mapped file
1422 * after the sys_close call (which hits the vfs layer as a flush).
1423 * This means that we can't safely call nfsv4 close on a file until
1424 * the inode is cleared. This in turn means that we are not good
1425 * NFSv4 citizens - we do not indicate to the server to update the file's
1426 * share state even when we are done with one of the three share
1427 * stateid's in the inode.
1429 * NOTE: Caller must be holding the sp->so_owner semaphore!
1431 int nfs4_do_close(struct path
*path
, struct nfs4_state
*state
, int wait
)
1433 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1434 struct nfs4_closedata
*calldata
;
1435 struct nfs4_state_owner
*sp
= state
->owner
;
1436 struct rpc_task
*task
;
1437 struct rpc_message msg
= {
1438 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CLOSE
],
1439 .rpc_cred
= state
->owner
->so_cred
,
1441 struct rpc_task_setup task_setup_data
= {
1442 .rpc_client
= server
->client
,
1443 .rpc_message
= &msg
,
1444 .callback_ops
= &nfs4_close_ops
,
1445 .workqueue
= nfsiod_workqueue
,
1446 .flags
= RPC_TASK_ASYNC
,
1448 int status
= -ENOMEM
;
1450 calldata
= kmalloc(sizeof(*calldata
), GFP_KERNEL
);
1451 if (calldata
== NULL
)
1453 calldata
->inode
= state
->inode
;
1454 calldata
->state
= state
;
1455 calldata
->arg
.fh
= NFS_FH(state
->inode
);
1456 calldata
->arg
.stateid
= &state
->open_stateid
;
1457 /* Serialization for the sequence id */
1458 calldata
->arg
.seqid
= nfs_alloc_seqid(&state
->owner
->so_seqid
);
1459 if (calldata
->arg
.seqid
== NULL
)
1460 goto out_free_calldata
;
1461 calldata
->arg
.fmode
= 0;
1462 calldata
->arg
.bitmask
= server
->cache_consistency_bitmask
;
1463 calldata
->res
.fattr
= &calldata
->fattr
;
1464 calldata
->res
.seqid
= calldata
->arg
.seqid
;
1465 calldata
->res
.server
= server
;
1466 calldata
->path
.mnt
= mntget(path
->mnt
);
1467 calldata
->path
.dentry
= dget(path
->dentry
);
1469 msg
.rpc_argp
= &calldata
->arg
,
1470 msg
.rpc_resp
= &calldata
->res
,
1471 task_setup_data
.callback_data
= calldata
;
1472 task
= rpc_run_task(&task_setup_data
);
1474 return PTR_ERR(task
);
1477 status
= rpc_wait_for_completion_task(task
);
1483 nfs4_put_open_state(state
);
1484 nfs4_put_state_owner(sp
);
1488 static int nfs4_intent_set_file(struct nameidata
*nd
, struct path
*path
, struct nfs4_state
*state
, fmode_t fmode
)
1493 /* If the open_intent is for execute, we have an extra check to make */
1494 if (fmode
& FMODE_EXEC
) {
1495 ret
= nfs_may_open(state
->inode
,
1496 state
->owner
->so_cred
,
1497 nd
->intent
.open
.flags
);
1501 filp
= lookup_instantiate_filp(nd
, path
->dentry
, NULL
);
1502 if (!IS_ERR(filp
)) {
1503 struct nfs_open_context
*ctx
;
1504 ctx
= nfs_file_open_context(filp
);
1508 ret
= PTR_ERR(filp
);
1510 nfs4_close_sync(path
, state
, fmode
& (FMODE_READ
|FMODE_WRITE
));
1515 nfs4_atomic_open(struct inode
*dir
, struct dentry
*dentry
, struct nameidata
*nd
)
1517 struct path path
= {
1518 .mnt
= nd
->path
.mnt
,
1521 struct dentry
*parent
;
1523 struct rpc_cred
*cred
;
1524 struct nfs4_state
*state
;
1526 fmode_t fmode
= nd
->intent
.open
.flags
& (FMODE_READ
| FMODE_WRITE
| FMODE_EXEC
);
1528 if (nd
->flags
& LOOKUP_CREATE
) {
1529 attr
.ia_mode
= nd
->intent
.open
.create_mode
;
1530 attr
.ia_valid
= ATTR_MODE
;
1531 if (!IS_POSIXACL(dir
))
1532 attr
.ia_mode
&= ~current_umask();
1535 BUG_ON(nd
->intent
.open
.flags
& O_CREAT
);
1538 cred
= rpc_lookup_cred();
1540 return (struct dentry
*)cred
;
1541 parent
= dentry
->d_parent
;
1542 /* Protect against concurrent sillydeletes */
1543 nfs_block_sillyrename(parent
);
1544 state
= nfs4_do_open(dir
, &path
, fmode
, nd
->intent
.open
.flags
, &attr
, cred
);
1546 if (IS_ERR(state
)) {
1547 if (PTR_ERR(state
) == -ENOENT
) {
1548 d_add(dentry
, NULL
);
1549 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
1551 nfs_unblock_sillyrename(parent
);
1552 return (struct dentry
*)state
;
1554 res
= d_add_unique(dentry
, igrab(state
->inode
));
1557 nfs_set_verifier(path
.dentry
, nfs_save_change_attribute(dir
));
1558 nfs_unblock_sillyrename(parent
);
1559 nfs4_intent_set_file(nd
, &path
, state
, fmode
);
1564 nfs4_open_revalidate(struct inode
*dir
, struct dentry
*dentry
, int openflags
, struct nameidata
*nd
)
1566 struct path path
= {
1567 .mnt
= nd
->path
.mnt
,
1570 struct rpc_cred
*cred
;
1571 struct nfs4_state
*state
;
1572 fmode_t fmode
= openflags
& (FMODE_READ
| FMODE_WRITE
);
1574 cred
= rpc_lookup_cred();
1576 return PTR_ERR(cred
);
1577 state
= nfs4_do_open(dir
, &path
, fmode
, openflags
, NULL
, cred
);
1579 if (IS_ERR(state
)) {
1580 switch (PTR_ERR(state
)) {
1586 lookup_instantiate_filp(nd
, (struct dentry
*)state
, NULL
);
1592 if (state
->inode
== dentry
->d_inode
) {
1593 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
1594 nfs4_intent_set_file(nd
, &path
, state
, fmode
);
1597 nfs4_close_sync(&path
, state
, fmode
);
1603 void nfs4_close_context(struct nfs_open_context
*ctx
, int is_sync
)
1605 if (ctx
->state
== NULL
)
1608 nfs4_close_sync(&ctx
->path
, ctx
->state
, ctx
->mode
);
1610 nfs4_close_state(&ctx
->path
, ctx
->state
, ctx
->mode
);
1613 static int _nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1615 struct nfs4_server_caps_arg args
= {
1618 struct nfs4_server_caps_res res
= {};
1619 struct rpc_message msg
= {
1620 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SERVER_CAPS
],
1626 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
1628 memcpy(server
->attr_bitmask
, res
.attr_bitmask
, sizeof(server
->attr_bitmask
));
1629 if (res
.attr_bitmask
[0] & FATTR4_WORD0_ACL
)
1630 server
->caps
|= NFS_CAP_ACLS
;
1631 if (res
.has_links
!= 0)
1632 server
->caps
|= NFS_CAP_HARDLINKS
;
1633 if (res
.has_symlinks
!= 0)
1634 server
->caps
|= NFS_CAP_SYMLINKS
;
1635 memcpy(server
->cache_consistency_bitmask
, res
.attr_bitmask
, sizeof(server
->cache_consistency_bitmask
));
1636 server
->cache_consistency_bitmask
[0] &= FATTR4_WORD0_CHANGE
|FATTR4_WORD0_SIZE
;
1637 server
->cache_consistency_bitmask
[1] &= FATTR4_WORD1_TIME_METADATA
|FATTR4_WORD1_TIME_MODIFY
;
1638 server
->acl_bitmask
= res
.acl_bitmask
;
1644 int nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1646 struct nfs4_exception exception
= { };
1649 err
= nfs4_handle_exception(server
,
1650 _nfs4_server_capabilities(server
, fhandle
),
1652 } while (exception
.retry
);
1656 static int _nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1657 struct nfs_fsinfo
*info
)
1659 struct nfs4_lookup_root_arg args
= {
1660 .bitmask
= nfs4_fattr_bitmap
,
1662 struct nfs4_lookup_res res
= {
1664 .fattr
= info
->fattr
,
1667 struct rpc_message msg
= {
1668 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP_ROOT
],
1672 nfs_fattr_init(info
->fattr
);
1673 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
1676 static int nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1677 struct nfs_fsinfo
*info
)
1679 struct nfs4_exception exception
= { };
1682 err
= nfs4_handle_exception(server
,
1683 _nfs4_lookup_root(server
, fhandle
, info
),
1685 } while (exception
.retry
);
1690 * get the file handle for the "/" directory on the server
1692 static int nfs4_proc_get_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1693 struct nfs_fsinfo
*info
)
1697 status
= nfs4_lookup_root(server
, fhandle
, info
);
1699 status
= nfs4_server_capabilities(server
, fhandle
);
1701 status
= nfs4_do_fsinfo(server
, fhandle
, info
);
1702 return nfs4_map_errors(status
);
1706 * Get locations and (maybe) other attributes of a referral.
1707 * Note that we'll actually follow the referral later when
1708 * we detect fsid mismatch in inode revalidation
1710 static int nfs4_get_referral(struct inode
*dir
, const struct qstr
*name
, struct nfs_fattr
*fattr
, struct nfs_fh
*fhandle
)
1712 int status
= -ENOMEM
;
1713 struct page
*page
= NULL
;
1714 struct nfs4_fs_locations
*locations
= NULL
;
1716 page
= alloc_page(GFP_KERNEL
);
1719 locations
= kmalloc(sizeof(struct nfs4_fs_locations
), GFP_KERNEL
);
1720 if (locations
== NULL
)
1723 status
= nfs4_proc_fs_locations(dir
, name
, locations
, page
);
1726 /* Make sure server returned a different fsid for the referral */
1727 if (nfs_fsid_equal(&NFS_SERVER(dir
)->fsid
, &locations
->fattr
.fsid
)) {
1728 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__
, name
->name
);
1733 memcpy(fattr
, &locations
->fattr
, sizeof(struct nfs_fattr
));
1734 fattr
->valid
|= NFS_ATTR_FATTR_V4_REFERRAL
;
1736 fattr
->mode
= S_IFDIR
;
1737 memset(fhandle
, 0, sizeof(struct nfs_fh
));
1746 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1748 struct nfs4_getattr_arg args
= {
1750 .bitmask
= server
->attr_bitmask
,
1752 struct nfs4_getattr_res res
= {
1756 struct rpc_message msg
= {
1757 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETATTR
],
1762 nfs_fattr_init(fattr
);
1763 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
1766 static int nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1768 struct nfs4_exception exception
= { };
1771 err
= nfs4_handle_exception(server
,
1772 _nfs4_proc_getattr(server
, fhandle
, fattr
),
1774 } while (exception
.retry
);
1779 * The file is not closed if it is opened due to the a request to change
1780 * the size of the file. The open call will not be needed once the
1781 * VFS layer lookup-intents are implemented.
1783 * Close is called when the inode is destroyed.
1784 * If we haven't opened the file for O_WRONLY, we
1785 * need to in the size_change case to obtain a stateid.
1788 * Because OPEN is always done by name in nfsv4, it is
1789 * possible that we opened a different file by the same
1790 * name. We can recognize this race condition, but we
1791 * can't do anything about it besides returning an error.
1793 * This will be fixed with VFS changes (lookup-intent).
1796 nfs4_proc_setattr(struct dentry
*dentry
, struct nfs_fattr
*fattr
,
1797 struct iattr
*sattr
)
1799 struct inode
*inode
= dentry
->d_inode
;
1800 struct rpc_cred
*cred
= NULL
;
1801 struct nfs4_state
*state
= NULL
;
1804 nfs_fattr_init(fattr
);
1806 /* Search for an existing open(O_WRITE) file */
1807 if (sattr
->ia_valid
& ATTR_FILE
) {
1808 struct nfs_open_context
*ctx
;
1810 ctx
= nfs_file_open_context(sattr
->ia_file
);
1817 status
= nfs4_do_setattr(inode
, cred
, fattr
, sattr
, state
);
1819 nfs_setattr_update_inode(inode
, sattr
);
1823 static int _nfs4_proc_lookupfh(struct nfs_server
*server
, const struct nfs_fh
*dirfh
,
1824 const struct qstr
*name
, struct nfs_fh
*fhandle
,
1825 struct nfs_fattr
*fattr
)
1828 struct nfs4_lookup_arg args
= {
1829 .bitmask
= server
->attr_bitmask
,
1833 struct nfs4_lookup_res res
= {
1838 struct rpc_message msg
= {
1839 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP
],
1844 nfs_fattr_init(fattr
);
1846 dprintk("NFS call lookupfh %s\n", name
->name
);
1847 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
1848 dprintk("NFS reply lookupfh: %d\n", status
);
1852 static int nfs4_proc_lookupfh(struct nfs_server
*server
, struct nfs_fh
*dirfh
,
1853 struct qstr
*name
, struct nfs_fh
*fhandle
,
1854 struct nfs_fattr
*fattr
)
1856 struct nfs4_exception exception
= { };
1859 err
= _nfs4_proc_lookupfh(server
, dirfh
, name
, fhandle
, fattr
);
1861 if (err
== -NFS4ERR_MOVED
) {
1865 err
= nfs4_handle_exception(server
, err
, &exception
);
1866 } while (exception
.retry
);
1870 static int _nfs4_proc_lookup(struct inode
*dir
, const struct qstr
*name
,
1871 struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1875 dprintk("NFS call lookup %s\n", name
->name
);
1876 status
= _nfs4_proc_lookupfh(NFS_SERVER(dir
), NFS_FH(dir
), name
, fhandle
, fattr
);
1877 if (status
== -NFS4ERR_MOVED
)
1878 status
= nfs4_get_referral(dir
, name
, fattr
, fhandle
);
1879 dprintk("NFS reply lookup: %d\n", status
);
1883 static int nfs4_proc_lookup(struct inode
*dir
, struct qstr
*name
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1885 struct nfs4_exception exception
= { };
1888 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1889 _nfs4_proc_lookup(dir
, name
, fhandle
, fattr
),
1891 } while (exception
.retry
);
1895 static int _nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
1897 struct nfs_server
*server
= NFS_SERVER(inode
);
1898 struct nfs_fattr fattr
;
1899 struct nfs4_accessargs args
= {
1900 .fh
= NFS_FH(inode
),
1901 .bitmask
= server
->attr_bitmask
,
1903 struct nfs4_accessres res
= {
1907 struct rpc_message msg
= {
1908 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_ACCESS
],
1911 .rpc_cred
= entry
->cred
,
1913 int mode
= entry
->mask
;
1917 * Determine which access bits we want to ask for...
1919 if (mode
& MAY_READ
)
1920 args
.access
|= NFS4_ACCESS_READ
;
1921 if (S_ISDIR(inode
->i_mode
)) {
1922 if (mode
& MAY_WRITE
)
1923 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
;
1924 if (mode
& MAY_EXEC
)
1925 args
.access
|= NFS4_ACCESS_LOOKUP
;
1927 if (mode
& MAY_WRITE
)
1928 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
;
1929 if (mode
& MAY_EXEC
)
1930 args
.access
|= NFS4_ACCESS_EXECUTE
;
1932 nfs_fattr_init(&fattr
);
1933 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
1936 if (res
.access
& NFS4_ACCESS_READ
)
1937 entry
->mask
|= MAY_READ
;
1938 if (res
.access
& (NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
))
1939 entry
->mask
|= MAY_WRITE
;
1940 if (res
.access
& (NFS4_ACCESS_LOOKUP
|NFS4_ACCESS_EXECUTE
))
1941 entry
->mask
|= MAY_EXEC
;
1942 nfs_refresh_inode(inode
, &fattr
);
1947 static int nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
1949 struct nfs4_exception exception
= { };
1952 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1953 _nfs4_proc_access(inode
, entry
),
1955 } while (exception
.retry
);
1960 * TODO: For the time being, we don't try to get any attributes
1961 * along with any of the zero-copy operations READ, READDIR,
1964 * In the case of the first three, we want to put the GETATTR
1965 * after the read-type operation -- this is because it is hard
1966 * to predict the length of a GETATTR response in v4, and thus
1967 * align the READ data correctly. This means that the GETATTR
1968 * may end up partially falling into the page cache, and we should
1969 * shift it into the 'tail' of the xdr_buf before processing.
1970 * To do this efficiently, we need to know the total length
1971 * of data received, which doesn't seem to be available outside
1974 * In the case of WRITE, we also want to put the GETATTR after
1975 * the operation -- in this case because we want to make sure
1976 * we get the post-operation mtime and size. This means that
1977 * we can't use xdr_encode_pages() as written: we need a variant
1978 * of it which would leave room in the 'tail' iovec.
1980 * Both of these changes to the XDR layer would in fact be quite
1981 * minor, but I decided to leave them for a subsequent patch.
1983 static int _nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
1984 unsigned int pgbase
, unsigned int pglen
)
1986 struct nfs4_readlink args
= {
1987 .fh
= NFS_FH(inode
),
1992 struct nfs4_readlink_res res
;
1993 struct rpc_message msg
= {
1994 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READLINK
],
1999 return nfs4_call_sync(NFS_SERVER(inode
), &msg
, &args
, &res
, 0);
2002 static int nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
2003 unsigned int pgbase
, unsigned int pglen
)
2005 struct nfs4_exception exception
= { };
2008 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2009 _nfs4_proc_readlink(inode
, page
, pgbase
, pglen
),
2011 } while (exception
.retry
);
2017 * We will need to arrange for the VFS layer to provide an atomic open.
2018 * Until then, this create/open method is prone to inefficiency and race
2019 * conditions due to the lookup, create, and open VFS calls from sys_open()
2020 * placed on the wire.
2022 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2023 * The file will be opened again in the subsequent VFS open call
2024 * (nfs4_proc_file_open).
2026 * The open for read will just hang around to be used by any process that
2027 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2031 nfs4_proc_create(struct inode
*dir
, struct dentry
*dentry
, struct iattr
*sattr
,
2032 int flags
, struct nameidata
*nd
)
2034 struct path path
= {
2035 .mnt
= nd
->path
.mnt
,
2038 struct nfs4_state
*state
;
2039 struct rpc_cred
*cred
;
2040 fmode_t fmode
= flags
& (FMODE_READ
| FMODE_WRITE
);
2043 cred
= rpc_lookup_cred();
2045 status
= PTR_ERR(cred
);
2048 state
= nfs4_do_open(dir
, &path
, fmode
, flags
, sattr
, cred
);
2050 if (IS_ERR(state
)) {
2051 status
= PTR_ERR(state
);
2054 d_add(dentry
, igrab(state
->inode
));
2055 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
2056 if (flags
& O_EXCL
) {
2057 struct nfs_fattr fattr
;
2058 status
= nfs4_do_setattr(state
->inode
, cred
, &fattr
, sattr
, state
);
2060 nfs_setattr_update_inode(state
->inode
, sattr
);
2061 nfs_post_op_update_inode(state
->inode
, &fattr
);
2063 if (status
== 0 && (nd
->flags
& LOOKUP_OPEN
) != 0)
2064 status
= nfs4_intent_set_file(nd
, &path
, state
, fmode
);
2066 nfs4_close_sync(&path
, state
, fmode
);
2073 static int _nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
2075 struct nfs_server
*server
= NFS_SERVER(dir
);
2076 struct nfs_removeargs args
= {
2078 .name
.len
= name
->len
,
2079 .name
.name
= name
->name
,
2080 .bitmask
= server
->attr_bitmask
,
2082 struct nfs_removeres res
= {
2085 struct rpc_message msg
= {
2086 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
],
2092 nfs_fattr_init(&res
.dir_attr
);
2093 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 1);
2095 update_changeattr(dir
, &res
.cinfo
);
2096 nfs_post_op_update_inode(dir
, &res
.dir_attr
);
2101 static int nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
2103 struct nfs4_exception exception
= { };
2106 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2107 _nfs4_proc_remove(dir
, name
),
2109 } while (exception
.retry
);
2113 static void nfs4_proc_unlink_setup(struct rpc_message
*msg
, struct inode
*dir
)
2115 struct nfs_server
*server
= NFS_SERVER(dir
);
2116 struct nfs_removeargs
*args
= msg
->rpc_argp
;
2117 struct nfs_removeres
*res
= msg
->rpc_resp
;
2119 args
->bitmask
= server
->cache_consistency_bitmask
;
2120 res
->server
= server
;
2121 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
];
2124 static int nfs4_proc_unlink_done(struct rpc_task
*task
, struct inode
*dir
)
2126 struct nfs_removeres
*res
= task
->tk_msg
.rpc_resp
;
2128 if (nfs4_async_handle_error(task
, res
->server
, NULL
) == -EAGAIN
)
2130 update_changeattr(dir
, &res
->cinfo
);
2131 nfs_post_op_update_inode(dir
, &res
->dir_attr
);
2135 static int _nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2136 struct inode
*new_dir
, struct qstr
*new_name
)
2138 struct nfs_server
*server
= NFS_SERVER(old_dir
);
2139 struct nfs4_rename_arg arg
= {
2140 .old_dir
= NFS_FH(old_dir
),
2141 .new_dir
= NFS_FH(new_dir
),
2142 .old_name
= old_name
,
2143 .new_name
= new_name
,
2144 .bitmask
= server
->attr_bitmask
,
2146 struct nfs_fattr old_fattr
, new_fattr
;
2147 struct nfs4_rename_res res
= {
2149 .old_fattr
= &old_fattr
,
2150 .new_fattr
= &new_fattr
,
2152 struct rpc_message msg
= {
2153 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENAME
],
2159 nfs_fattr_init(res
.old_fattr
);
2160 nfs_fattr_init(res
.new_fattr
);
2161 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
2164 update_changeattr(old_dir
, &res
.old_cinfo
);
2165 nfs_post_op_update_inode(old_dir
, res
.old_fattr
);
2166 update_changeattr(new_dir
, &res
.new_cinfo
);
2167 nfs_post_op_update_inode(new_dir
, res
.new_fattr
);
2172 static int nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2173 struct inode
*new_dir
, struct qstr
*new_name
)
2175 struct nfs4_exception exception
= { };
2178 err
= nfs4_handle_exception(NFS_SERVER(old_dir
),
2179 _nfs4_proc_rename(old_dir
, old_name
,
2182 } while (exception
.retry
);
2186 static int _nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2188 struct nfs_server
*server
= NFS_SERVER(inode
);
2189 struct nfs4_link_arg arg
= {
2190 .fh
= NFS_FH(inode
),
2191 .dir_fh
= NFS_FH(dir
),
2193 .bitmask
= server
->attr_bitmask
,
2195 struct nfs_fattr fattr
, dir_attr
;
2196 struct nfs4_link_res res
= {
2199 .dir_attr
= &dir_attr
,
2201 struct rpc_message msg
= {
2202 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LINK
],
2208 nfs_fattr_init(res
.fattr
);
2209 nfs_fattr_init(res
.dir_attr
);
2210 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
2212 update_changeattr(dir
, &res
.cinfo
);
2213 nfs_post_op_update_inode(dir
, res
.dir_attr
);
2214 nfs_post_op_update_inode(inode
, res
.fattr
);
2220 static int nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2222 struct nfs4_exception exception
= { };
2225 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2226 _nfs4_proc_link(inode
, dir
, name
),
2228 } while (exception
.retry
);
2232 struct nfs4_createdata
{
2233 struct rpc_message msg
;
2234 struct nfs4_create_arg arg
;
2235 struct nfs4_create_res res
;
2237 struct nfs_fattr fattr
;
2238 struct nfs_fattr dir_fattr
;
2241 static struct nfs4_createdata
*nfs4_alloc_createdata(struct inode
*dir
,
2242 struct qstr
*name
, struct iattr
*sattr
, u32 ftype
)
2244 struct nfs4_createdata
*data
;
2246 data
= kzalloc(sizeof(*data
), GFP_KERNEL
);
2248 struct nfs_server
*server
= NFS_SERVER(dir
);
2250 data
->msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
];
2251 data
->msg
.rpc_argp
= &data
->arg
;
2252 data
->msg
.rpc_resp
= &data
->res
;
2253 data
->arg
.dir_fh
= NFS_FH(dir
);
2254 data
->arg
.server
= server
;
2255 data
->arg
.name
= name
;
2256 data
->arg
.attrs
= sattr
;
2257 data
->arg
.ftype
= ftype
;
2258 data
->arg
.bitmask
= server
->attr_bitmask
;
2259 data
->res
.server
= server
;
2260 data
->res
.fh
= &data
->fh
;
2261 data
->res
.fattr
= &data
->fattr
;
2262 data
->res
.dir_fattr
= &data
->dir_fattr
;
2263 nfs_fattr_init(data
->res
.fattr
);
2264 nfs_fattr_init(data
->res
.dir_fattr
);
2269 static int nfs4_do_create(struct inode
*dir
, struct dentry
*dentry
, struct nfs4_createdata
*data
)
2271 int status
= nfs4_call_sync(NFS_SERVER(dir
), &data
->msg
,
2272 &data
->arg
, &data
->res
, 1);
2274 update_changeattr(dir
, &data
->res
.dir_cinfo
);
2275 nfs_post_op_update_inode(dir
, data
->res
.dir_fattr
);
2276 status
= nfs_instantiate(dentry
, data
->res
.fh
, data
->res
.fattr
);
2281 static void nfs4_free_createdata(struct nfs4_createdata
*data
)
2286 static int _nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2287 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2289 struct nfs4_createdata
*data
;
2290 int status
= -ENAMETOOLONG
;
2292 if (len
> NFS4_MAXPATHLEN
)
2296 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4LNK
);
2300 data
->msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SYMLINK
];
2301 data
->arg
.u
.symlink
.pages
= &page
;
2302 data
->arg
.u
.symlink
.len
= len
;
2304 status
= nfs4_do_create(dir
, dentry
, data
);
2306 nfs4_free_createdata(data
);
2311 static int nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2312 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2314 struct nfs4_exception exception
= { };
2317 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2318 _nfs4_proc_symlink(dir
, dentry
, page
,
2321 } while (exception
.retry
);
2325 static int _nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2326 struct iattr
*sattr
)
2328 struct nfs4_createdata
*data
;
2329 int status
= -ENOMEM
;
2331 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4DIR
);
2335 status
= nfs4_do_create(dir
, dentry
, data
);
2337 nfs4_free_createdata(data
);
2342 static int nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2343 struct iattr
*sattr
)
2345 struct nfs4_exception exception
= { };
2348 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2349 _nfs4_proc_mkdir(dir
, dentry
, sattr
),
2351 } while (exception
.retry
);
2355 static int _nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2356 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2358 struct inode
*dir
= dentry
->d_inode
;
2359 struct nfs4_readdir_arg args
= {
2364 .bitmask
= NFS_SERVER(dentry
->d_inode
)->cache_consistency_bitmask
,
2366 struct nfs4_readdir_res res
;
2367 struct rpc_message msg
= {
2368 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READDIR
],
2375 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__
,
2376 dentry
->d_parent
->d_name
.name
,
2377 dentry
->d_name
.name
,
2378 (unsigned long long)cookie
);
2379 nfs4_setup_readdir(cookie
, NFS_COOKIEVERF(dir
), dentry
, &args
);
2380 res
.pgbase
= args
.pgbase
;
2381 status
= nfs4_call_sync(NFS_SERVER(dir
), &msg
, &args
, &res
, 0);
2383 memcpy(NFS_COOKIEVERF(dir
), res
.verifier
.data
, NFS4_VERIFIER_SIZE
);
2385 nfs_invalidate_atime(dir
);
2387 dprintk("%s: returns %d\n", __func__
, status
);
2391 static int nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2392 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2394 struct nfs4_exception exception
= { };
2397 err
= nfs4_handle_exception(NFS_SERVER(dentry
->d_inode
),
2398 _nfs4_proc_readdir(dentry
, cred
, cookie
,
2401 } while (exception
.retry
);
2405 static int _nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2406 struct iattr
*sattr
, dev_t rdev
)
2408 struct nfs4_createdata
*data
;
2409 int mode
= sattr
->ia_mode
;
2410 int status
= -ENOMEM
;
2412 BUG_ON(!(sattr
->ia_valid
& ATTR_MODE
));
2413 BUG_ON(!S_ISFIFO(mode
) && !S_ISBLK(mode
) && !S_ISCHR(mode
) && !S_ISSOCK(mode
));
2415 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4SOCK
);
2420 data
->arg
.ftype
= NF4FIFO
;
2421 else if (S_ISBLK(mode
)) {
2422 data
->arg
.ftype
= NF4BLK
;
2423 data
->arg
.u
.device
.specdata1
= MAJOR(rdev
);
2424 data
->arg
.u
.device
.specdata2
= MINOR(rdev
);
2426 else if (S_ISCHR(mode
)) {
2427 data
->arg
.ftype
= NF4CHR
;
2428 data
->arg
.u
.device
.specdata1
= MAJOR(rdev
);
2429 data
->arg
.u
.device
.specdata2
= MINOR(rdev
);
2432 status
= nfs4_do_create(dir
, dentry
, data
);
2434 nfs4_free_createdata(data
);
2439 static int nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2440 struct iattr
*sattr
, dev_t rdev
)
2442 struct nfs4_exception exception
= { };
2445 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2446 _nfs4_proc_mknod(dir
, dentry
, sattr
, rdev
),
2448 } while (exception
.retry
);
2452 static int _nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2453 struct nfs_fsstat
*fsstat
)
2455 struct nfs4_statfs_arg args
= {
2457 .bitmask
= server
->attr_bitmask
,
2459 struct nfs4_statfs_res res
= {
2462 struct rpc_message msg
= {
2463 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_STATFS
],
2468 nfs_fattr_init(fsstat
->fattr
);
2469 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2472 static int nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsstat
*fsstat
)
2474 struct nfs4_exception exception
= { };
2477 err
= nfs4_handle_exception(server
,
2478 _nfs4_proc_statfs(server
, fhandle
, fsstat
),
2480 } while (exception
.retry
);
2484 static int _nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2485 struct nfs_fsinfo
*fsinfo
)
2487 struct nfs4_fsinfo_arg args
= {
2489 .bitmask
= server
->attr_bitmask
,
2491 struct nfs4_fsinfo_res res
= {
2494 struct rpc_message msg
= {
2495 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FSINFO
],
2500 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2503 static int nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2505 struct nfs4_exception exception
= { };
2509 err
= nfs4_handle_exception(server
,
2510 _nfs4_do_fsinfo(server
, fhandle
, fsinfo
),
2512 } while (exception
.retry
);
2516 static int nfs4_proc_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2518 nfs_fattr_init(fsinfo
->fattr
);
2519 return nfs4_do_fsinfo(server
, fhandle
, fsinfo
);
2522 static int _nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2523 struct nfs_pathconf
*pathconf
)
2525 struct nfs4_pathconf_arg args
= {
2527 .bitmask
= server
->attr_bitmask
,
2529 struct nfs4_pathconf_res res
= {
2530 .pathconf
= pathconf
,
2532 struct rpc_message msg
= {
2533 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_PATHCONF
],
2538 /* None of the pathconf attributes are mandatory to implement */
2539 if ((args
.bitmask
[0] & nfs4_pathconf_bitmap
[0]) == 0) {
2540 memset(pathconf
, 0, sizeof(*pathconf
));
2544 nfs_fattr_init(pathconf
->fattr
);
2545 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2548 static int nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2549 struct nfs_pathconf
*pathconf
)
2551 struct nfs4_exception exception
= { };
2555 err
= nfs4_handle_exception(server
,
2556 _nfs4_proc_pathconf(server
, fhandle
, pathconf
),
2558 } while (exception
.retry
);
2562 static int nfs4_read_done(struct rpc_task
*task
, struct nfs_read_data
*data
)
2564 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2566 if (nfs4_async_handle_error(task
, server
, data
->args
.context
->state
) == -EAGAIN
) {
2567 rpc_restart_call(task
);
2571 nfs_invalidate_atime(data
->inode
);
2572 if (task
->tk_status
> 0)
2573 renew_lease(server
, data
->timestamp
);
2577 static void nfs4_proc_read_setup(struct nfs_read_data
*data
, struct rpc_message
*msg
)
2579 data
->timestamp
= jiffies
;
2580 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READ
];
2583 static int nfs4_write_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
2585 struct inode
*inode
= data
->inode
;
2587 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
), data
->args
.context
->state
) == -EAGAIN
) {
2588 rpc_restart_call(task
);
2591 if (task
->tk_status
>= 0) {
2592 renew_lease(NFS_SERVER(inode
), data
->timestamp
);
2593 nfs_post_op_update_inode_force_wcc(inode
, data
->res
.fattr
);
2598 static void nfs4_proc_write_setup(struct nfs_write_data
*data
, struct rpc_message
*msg
)
2600 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2602 data
->args
.bitmask
= server
->cache_consistency_bitmask
;
2603 data
->res
.server
= server
;
2604 data
->timestamp
= jiffies
;
2606 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_WRITE
];
2609 static int nfs4_commit_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
2611 struct inode
*inode
= data
->inode
;
2613 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
), NULL
) == -EAGAIN
) {
2614 rpc_restart_call(task
);
2617 nfs_refresh_inode(inode
, data
->res
.fattr
);
2621 static void nfs4_proc_commit_setup(struct nfs_write_data
*data
, struct rpc_message
*msg
)
2623 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2625 data
->args
.bitmask
= server
->cache_consistency_bitmask
;
2626 data
->res
.server
= server
;
2627 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_COMMIT
];
2631 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2632 * standalone procedure for queueing an asynchronous RENEW.
2634 static void nfs4_renew_done(struct rpc_task
*task
, void *data
)
2636 struct nfs_client
*clp
= (struct nfs_client
*)task
->tk_msg
.rpc_argp
;
2637 unsigned long timestamp
= (unsigned long)data
;
2639 if (task
->tk_status
< 0) {
2640 /* Unless we're shutting down, schedule state recovery! */
2641 if (test_bit(NFS_CS_RENEWD
, &clp
->cl_res_state
) != 0)
2642 nfs4_schedule_state_recovery(clp
);
2645 spin_lock(&clp
->cl_lock
);
2646 if (time_before(clp
->cl_last_renewal
,timestamp
))
2647 clp
->cl_last_renewal
= timestamp
;
2648 spin_unlock(&clp
->cl_lock
);
2651 static const struct rpc_call_ops nfs4_renew_ops
= {
2652 .rpc_call_done
= nfs4_renew_done
,
2655 int nfs4_proc_async_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2657 struct rpc_message msg
= {
2658 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2663 return rpc_call_async(clp
->cl_rpcclient
, &msg
, RPC_TASK_SOFT
,
2664 &nfs4_renew_ops
, (void *)jiffies
);
2667 int nfs4_proc_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2669 struct rpc_message msg
= {
2670 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2674 unsigned long now
= jiffies
;
2677 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2680 spin_lock(&clp
->cl_lock
);
2681 if (time_before(clp
->cl_last_renewal
,now
))
2682 clp
->cl_last_renewal
= now
;
2683 spin_unlock(&clp
->cl_lock
);
2687 static inline int nfs4_server_supports_acls(struct nfs_server
*server
)
2689 return (server
->caps
& NFS_CAP_ACLS
)
2690 && (server
->acl_bitmask
& ACL4_SUPPORT_ALLOW_ACL
)
2691 && (server
->acl_bitmask
& ACL4_SUPPORT_DENY_ACL
);
2694 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2695 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2698 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2700 static void buf_to_pages(const void *buf
, size_t buflen
,
2701 struct page
**pages
, unsigned int *pgbase
)
2703 const void *p
= buf
;
2705 *pgbase
= offset_in_page(buf
);
2707 while (p
< buf
+ buflen
) {
2708 *(pages
++) = virt_to_page(p
);
2709 p
+= PAGE_CACHE_SIZE
;
2713 struct nfs4_cached_acl
{
2719 static void nfs4_set_cached_acl(struct inode
*inode
, struct nfs4_cached_acl
*acl
)
2721 struct nfs_inode
*nfsi
= NFS_I(inode
);
2723 spin_lock(&inode
->i_lock
);
2724 kfree(nfsi
->nfs4_acl
);
2725 nfsi
->nfs4_acl
= acl
;
2726 spin_unlock(&inode
->i_lock
);
2729 static void nfs4_zap_acl_attr(struct inode
*inode
)
2731 nfs4_set_cached_acl(inode
, NULL
);
2734 static inline ssize_t
nfs4_read_cached_acl(struct inode
*inode
, char *buf
, size_t buflen
)
2736 struct nfs_inode
*nfsi
= NFS_I(inode
);
2737 struct nfs4_cached_acl
*acl
;
2740 spin_lock(&inode
->i_lock
);
2741 acl
= nfsi
->nfs4_acl
;
2744 if (buf
== NULL
) /* user is just asking for length */
2746 if (acl
->cached
== 0)
2748 ret
= -ERANGE
; /* see getxattr(2) man page */
2749 if (acl
->len
> buflen
)
2751 memcpy(buf
, acl
->data
, acl
->len
);
2755 spin_unlock(&inode
->i_lock
);
2759 static void nfs4_write_cached_acl(struct inode
*inode
, const char *buf
, size_t acl_len
)
2761 struct nfs4_cached_acl
*acl
;
2763 if (buf
&& acl_len
<= PAGE_SIZE
) {
2764 acl
= kmalloc(sizeof(*acl
) + acl_len
, GFP_KERNEL
);
2768 memcpy(acl
->data
, buf
, acl_len
);
2770 acl
= kmalloc(sizeof(*acl
), GFP_KERNEL
);
2777 nfs4_set_cached_acl(inode
, acl
);
2780 static ssize_t
__nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
2782 struct page
*pages
[NFS4ACL_MAXPAGES
];
2783 struct nfs_getaclargs args
= {
2784 .fh
= NFS_FH(inode
),
2788 struct nfs_getaclres res
= {
2792 struct rpc_message msg
= {
2793 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETACL
],
2797 struct page
*localpage
= NULL
;
2800 if (buflen
< PAGE_SIZE
) {
2801 /* As long as we're doing a round trip to the server anyway,
2802 * let's be prepared for a page of acl data. */
2803 localpage
= alloc_page(GFP_KERNEL
);
2804 resp_buf
= page_address(localpage
);
2805 if (localpage
== NULL
)
2807 args
.acl_pages
[0] = localpage
;
2808 args
.acl_pgbase
= 0;
2809 args
.acl_len
= PAGE_SIZE
;
2812 buf_to_pages(buf
, buflen
, args
.acl_pages
, &args
.acl_pgbase
);
2814 ret
= nfs4_call_sync(NFS_SERVER(inode
), &msg
, &args
, &res
, 0);
2817 if (res
.acl_len
> args
.acl_len
)
2818 nfs4_write_cached_acl(inode
, NULL
, res
.acl_len
);
2820 nfs4_write_cached_acl(inode
, resp_buf
, res
.acl_len
);
2823 if (res
.acl_len
> buflen
)
2826 memcpy(buf
, resp_buf
, res
.acl_len
);
2831 __free_page(localpage
);
2835 static ssize_t
nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
2837 struct nfs4_exception exception
= { };
2840 ret
= __nfs4_get_acl_uncached(inode
, buf
, buflen
);
2843 ret
= nfs4_handle_exception(NFS_SERVER(inode
), ret
, &exception
);
2844 } while (exception
.retry
);
2848 static ssize_t
nfs4_proc_get_acl(struct inode
*inode
, void *buf
, size_t buflen
)
2850 struct nfs_server
*server
= NFS_SERVER(inode
);
2853 if (!nfs4_server_supports_acls(server
))
2855 ret
= nfs_revalidate_inode(server
, inode
);
2858 if (NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ACL
)
2859 nfs_zap_acl_cache(inode
);
2860 ret
= nfs4_read_cached_acl(inode
, buf
, buflen
);
2863 return nfs4_get_acl_uncached(inode
, buf
, buflen
);
2866 static int __nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
2868 struct nfs_server
*server
= NFS_SERVER(inode
);
2869 struct page
*pages
[NFS4ACL_MAXPAGES
];
2870 struct nfs_setaclargs arg
= {
2871 .fh
= NFS_FH(inode
),
2875 struct nfs_setaclres res
;
2876 struct rpc_message msg
= {
2877 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETACL
],
2883 if (!nfs4_server_supports_acls(server
))
2885 nfs_inode_return_delegation(inode
);
2886 buf_to_pages(buf
, buflen
, arg
.acl_pages
, &arg
.acl_pgbase
);
2887 ret
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
2888 nfs_access_zap_cache(inode
);
2889 nfs_zap_acl_cache(inode
);
2893 static int nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
2895 struct nfs4_exception exception
= { };
2898 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2899 __nfs4_proc_set_acl(inode
, buf
, buflen
),
2901 } while (exception
.retry
);
2906 nfs4_async_handle_error(struct rpc_task
*task
, const struct nfs_server
*server
, struct nfs4_state
*state
)
2908 struct nfs_client
*clp
= server
->nfs_client
;
2910 if (!clp
|| task
->tk_status
>= 0)
2912 switch(task
->tk_status
) {
2913 case -NFS4ERR_ADMIN_REVOKED
:
2914 case -NFS4ERR_BAD_STATEID
:
2915 case -NFS4ERR_OPENMODE
:
2918 nfs4_state_mark_reclaim_nograce(clp
, state
);
2919 case -NFS4ERR_STALE_CLIENTID
:
2920 case -NFS4ERR_STALE_STATEID
:
2921 case -NFS4ERR_EXPIRED
:
2922 rpc_sleep_on(&clp
->cl_rpcwaitq
, task
, NULL
);
2923 nfs4_schedule_state_recovery(clp
);
2924 if (test_bit(NFS4CLNT_MANAGER_RUNNING
, &clp
->cl_state
) == 0)
2925 rpc_wake_up_queued_task(&clp
->cl_rpcwaitq
, task
);
2926 task
->tk_status
= 0;
2928 case -NFS4ERR_DELAY
:
2929 nfs_inc_server_stats(server
, NFSIOS_DELAY
);
2930 case -NFS4ERR_GRACE
:
2931 rpc_delay(task
, NFS4_POLL_RETRY_MAX
);
2932 task
->tk_status
= 0;
2934 case -NFS4ERR_OLD_STATEID
:
2935 task
->tk_status
= 0;
2938 task
->tk_status
= nfs4_map_errors(task
->tk_status
);
2942 int nfs4_proc_setclientid(struct nfs_client
*clp
, u32 program
, unsigned short port
, struct rpc_cred
*cred
)
2944 nfs4_verifier sc_verifier
;
2945 struct nfs4_setclientid setclientid
= {
2946 .sc_verifier
= &sc_verifier
,
2949 struct rpc_message msg
= {
2950 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID
],
2951 .rpc_argp
= &setclientid
,
2959 p
= (__be32
*)sc_verifier
.data
;
2960 *p
++ = htonl((u32
)clp
->cl_boot_time
.tv_sec
);
2961 *p
= htonl((u32
)clp
->cl_boot_time
.tv_nsec
);
2964 setclientid
.sc_name_len
= scnprintf(setclientid
.sc_name
,
2965 sizeof(setclientid
.sc_name
), "%s/%s %s %s %u",
2967 rpc_peeraddr2str(clp
->cl_rpcclient
,
2969 rpc_peeraddr2str(clp
->cl_rpcclient
,
2971 clp
->cl_rpcclient
->cl_auth
->au_ops
->au_name
,
2972 clp
->cl_id_uniquifier
);
2973 setclientid
.sc_netid_len
= scnprintf(setclientid
.sc_netid
,
2974 sizeof(setclientid
.sc_netid
),
2975 rpc_peeraddr2str(clp
->cl_rpcclient
,
2976 RPC_DISPLAY_NETID
));
2977 setclientid
.sc_uaddr_len
= scnprintf(setclientid
.sc_uaddr
,
2978 sizeof(setclientid
.sc_uaddr
), "%s.%u.%u",
2979 clp
->cl_ipaddr
, port
>> 8, port
& 255);
2981 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2982 if (status
!= -NFS4ERR_CLID_INUSE
)
2987 ssleep(clp
->cl_lease_time
+ 1);
2989 if (++clp
->cl_id_uniquifier
== 0)
2995 static int _nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2997 struct nfs_fsinfo fsinfo
;
2998 struct rpc_message msg
= {
2999 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID_CONFIRM
],
3001 .rpc_resp
= &fsinfo
,
3008 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
3010 spin_lock(&clp
->cl_lock
);
3011 clp
->cl_lease_time
= fsinfo
.lease_time
* HZ
;
3012 clp
->cl_last_renewal
= now
;
3013 spin_unlock(&clp
->cl_lock
);
3018 int nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
3023 err
= _nfs4_proc_setclientid_confirm(clp
, cred
);
3027 case -NFS4ERR_RESOURCE
:
3028 /* The IBM lawyers misread another document! */
3029 case -NFS4ERR_DELAY
:
3030 err
= nfs4_delay(clp
->cl_rpcclient
, &timeout
);
3036 struct nfs4_delegreturndata
{
3037 struct nfs4_delegreturnargs args
;
3038 struct nfs4_delegreturnres res
;
3040 nfs4_stateid stateid
;
3041 unsigned long timestamp
;
3042 struct nfs_fattr fattr
;
3046 static void nfs4_delegreturn_done(struct rpc_task
*task
, void *calldata
)
3048 struct nfs4_delegreturndata
*data
= calldata
;
3049 data
->rpc_status
= task
->tk_status
;
3050 if (data
->rpc_status
== 0)
3051 renew_lease(data
->res
.server
, data
->timestamp
);
3054 static void nfs4_delegreturn_release(void *calldata
)
3059 static const struct rpc_call_ops nfs4_delegreturn_ops
= {
3060 .rpc_call_done
= nfs4_delegreturn_done
,
3061 .rpc_release
= nfs4_delegreturn_release
,
3064 static int _nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
, int issync
)
3066 struct nfs4_delegreturndata
*data
;
3067 struct nfs_server
*server
= NFS_SERVER(inode
);
3068 struct rpc_task
*task
;
3069 struct rpc_message msg
= {
3070 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DELEGRETURN
],
3073 struct rpc_task_setup task_setup_data
= {
3074 .rpc_client
= server
->client
,
3075 .rpc_message
= &msg
,
3076 .callback_ops
= &nfs4_delegreturn_ops
,
3077 .flags
= RPC_TASK_ASYNC
,
3081 data
= kmalloc(sizeof(*data
), GFP_KERNEL
);
3084 data
->args
.fhandle
= &data
->fh
;
3085 data
->args
.stateid
= &data
->stateid
;
3086 data
->args
.bitmask
= server
->attr_bitmask
;
3087 nfs_copy_fh(&data
->fh
, NFS_FH(inode
));
3088 memcpy(&data
->stateid
, stateid
, sizeof(data
->stateid
));
3089 data
->res
.fattr
= &data
->fattr
;
3090 data
->res
.server
= server
;
3091 nfs_fattr_init(data
->res
.fattr
);
3092 data
->timestamp
= jiffies
;
3093 data
->rpc_status
= 0;
3095 task_setup_data
.callback_data
= data
;
3096 msg
.rpc_argp
= &data
->args
,
3097 msg
.rpc_resp
= &data
->res
,
3098 task
= rpc_run_task(&task_setup_data
);
3100 return PTR_ERR(task
);
3103 status
= nfs4_wait_for_completion_rpc_task(task
);
3106 status
= data
->rpc_status
;
3109 nfs_refresh_inode(inode
, &data
->fattr
);
3115 int nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
, int issync
)
3117 struct nfs_server
*server
= NFS_SERVER(inode
);
3118 struct nfs4_exception exception
= { };
3121 err
= _nfs4_proc_delegreturn(inode
, cred
, stateid
, issync
);
3123 case -NFS4ERR_STALE_STATEID
:
3124 case -NFS4ERR_EXPIRED
:
3128 err
= nfs4_handle_exception(server
, err
, &exception
);
3129 } while (exception
.retry
);
3133 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3134 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3137 * sleep, with exponential backoff, and retry the LOCK operation.
3139 static unsigned long
3140 nfs4_set_lock_task_retry(unsigned long timeout
)
3142 schedule_timeout_killable(timeout
);
3144 if (timeout
> NFS4_LOCK_MAXTIMEOUT
)
3145 return NFS4_LOCK_MAXTIMEOUT
;
3149 static int _nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3151 struct inode
*inode
= state
->inode
;
3152 struct nfs_server
*server
= NFS_SERVER(inode
);
3153 struct nfs_client
*clp
= server
->nfs_client
;
3154 struct nfs_lockt_args arg
= {
3155 .fh
= NFS_FH(inode
),
3158 struct nfs_lockt_res res
= {
3161 struct rpc_message msg
= {
3162 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKT
],
3165 .rpc_cred
= state
->owner
->so_cred
,
3167 struct nfs4_lock_state
*lsp
;
3170 arg
.lock_owner
.clientid
= clp
->cl_clientid
;
3171 status
= nfs4_set_lock_state(state
, request
);
3174 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3175 arg
.lock_owner
.id
= lsp
->ls_id
.id
;
3176 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
3179 request
->fl_type
= F_UNLCK
;
3181 case -NFS4ERR_DENIED
:
3184 request
->fl_ops
->fl_release_private(request
);
3189 static int nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3191 struct nfs4_exception exception
= { };
3195 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3196 _nfs4_proc_getlk(state
, cmd
, request
),
3198 } while (exception
.retry
);
3202 static int do_vfs_lock(struct file
*file
, struct file_lock
*fl
)
3205 switch (fl
->fl_flags
& (FL_POSIX
|FL_FLOCK
)) {
3207 res
= posix_lock_file_wait(file
, fl
);
3210 res
= flock_lock_file_wait(file
, fl
);
3218 struct nfs4_unlockdata
{
3219 struct nfs_locku_args arg
;
3220 struct nfs_locku_res res
;
3221 struct nfs4_lock_state
*lsp
;
3222 struct nfs_open_context
*ctx
;
3223 struct file_lock fl
;
3224 const struct nfs_server
*server
;
3225 unsigned long timestamp
;
3228 static struct nfs4_unlockdata
*nfs4_alloc_unlockdata(struct file_lock
*fl
,
3229 struct nfs_open_context
*ctx
,
3230 struct nfs4_lock_state
*lsp
,
3231 struct nfs_seqid
*seqid
)
3233 struct nfs4_unlockdata
*p
;
3234 struct inode
*inode
= lsp
->ls_state
->inode
;
3236 p
= kmalloc(sizeof(*p
), GFP_KERNEL
);
3239 p
->arg
.fh
= NFS_FH(inode
);
3241 p
->arg
.seqid
= seqid
;
3242 p
->res
.seqid
= seqid
;
3243 p
->arg
.stateid
= &lsp
->ls_stateid
;
3245 atomic_inc(&lsp
->ls_count
);
3246 /* Ensure we don't close file until we're done freeing locks! */
3247 p
->ctx
= get_nfs_open_context(ctx
);
3248 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3249 p
->server
= NFS_SERVER(inode
);
3253 static void nfs4_locku_release_calldata(void *data
)
3255 struct nfs4_unlockdata
*calldata
= data
;
3256 nfs_free_seqid(calldata
->arg
.seqid
);
3257 nfs4_put_lock_state(calldata
->lsp
);
3258 put_nfs_open_context(calldata
->ctx
);
3262 static void nfs4_locku_done(struct rpc_task
*task
, void *data
)
3264 struct nfs4_unlockdata
*calldata
= data
;
3266 if (RPC_ASSASSINATED(task
))
3268 switch (task
->tk_status
) {
3270 memcpy(calldata
->lsp
->ls_stateid
.data
,
3271 calldata
->res
.stateid
.data
,
3272 sizeof(calldata
->lsp
->ls_stateid
.data
));
3273 renew_lease(calldata
->server
, calldata
->timestamp
);
3275 case -NFS4ERR_BAD_STATEID
:
3276 case -NFS4ERR_OLD_STATEID
:
3277 case -NFS4ERR_STALE_STATEID
:
3278 case -NFS4ERR_EXPIRED
:
3281 if (nfs4_async_handle_error(task
, calldata
->server
, NULL
) == -EAGAIN
)
3282 rpc_restart_call(task
);
3286 static void nfs4_locku_prepare(struct rpc_task
*task
, void *data
)
3288 struct nfs4_unlockdata
*calldata
= data
;
3290 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
3292 if ((calldata
->lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) == 0) {
3293 /* Note: exit _without_ running nfs4_locku_done */
3294 task
->tk_action
= NULL
;
3297 calldata
->timestamp
= jiffies
;
3298 rpc_call_start(task
);
3301 static const struct rpc_call_ops nfs4_locku_ops
= {
3302 .rpc_call_prepare
= nfs4_locku_prepare
,
3303 .rpc_call_done
= nfs4_locku_done
,
3304 .rpc_release
= nfs4_locku_release_calldata
,
3307 static struct rpc_task
*nfs4_do_unlck(struct file_lock
*fl
,
3308 struct nfs_open_context
*ctx
,
3309 struct nfs4_lock_state
*lsp
,
3310 struct nfs_seqid
*seqid
)
3312 struct nfs4_unlockdata
*data
;
3313 struct rpc_message msg
= {
3314 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKU
],
3315 .rpc_cred
= ctx
->cred
,
3317 struct rpc_task_setup task_setup_data
= {
3318 .rpc_client
= NFS_CLIENT(lsp
->ls_state
->inode
),
3319 .rpc_message
= &msg
,
3320 .callback_ops
= &nfs4_locku_ops
,
3321 .workqueue
= nfsiod_workqueue
,
3322 .flags
= RPC_TASK_ASYNC
,
3325 /* Ensure this is an unlock - when canceling a lock, the
3326 * canceled lock is passed in, and it won't be an unlock.
3328 fl
->fl_type
= F_UNLCK
;
3330 data
= nfs4_alloc_unlockdata(fl
, ctx
, lsp
, seqid
);
3332 nfs_free_seqid(seqid
);
3333 return ERR_PTR(-ENOMEM
);
3336 msg
.rpc_argp
= &data
->arg
,
3337 msg
.rpc_resp
= &data
->res
,
3338 task_setup_data
.callback_data
= data
;
3339 return rpc_run_task(&task_setup_data
);
3342 static int nfs4_proc_unlck(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3344 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
3345 struct nfs_seqid
*seqid
;
3346 struct nfs4_lock_state
*lsp
;
3347 struct rpc_task
*task
;
3349 unsigned char fl_flags
= request
->fl_flags
;
3351 status
= nfs4_set_lock_state(state
, request
);
3352 /* Unlock _before_ we do the RPC call */
3353 request
->fl_flags
|= FL_EXISTS
;
3354 down_read(&nfsi
->rwsem
);
3355 if (do_vfs_lock(request
->fl_file
, request
) == -ENOENT
) {
3356 up_read(&nfsi
->rwsem
);
3359 up_read(&nfsi
->rwsem
);
3362 /* Is this a delegated lock? */
3363 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
3365 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3366 seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3370 task
= nfs4_do_unlck(request
, nfs_file_open_context(request
->fl_file
), lsp
, seqid
);
3371 status
= PTR_ERR(task
);
3374 status
= nfs4_wait_for_completion_rpc_task(task
);
3377 request
->fl_flags
= fl_flags
;
3381 struct nfs4_lockdata
{
3382 struct nfs_lock_args arg
;
3383 struct nfs_lock_res res
;
3384 struct nfs4_lock_state
*lsp
;
3385 struct nfs_open_context
*ctx
;
3386 struct file_lock fl
;
3387 unsigned long timestamp
;
3392 static struct nfs4_lockdata
*nfs4_alloc_lockdata(struct file_lock
*fl
,
3393 struct nfs_open_context
*ctx
, struct nfs4_lock_state
*lsp
)
3395 struct nfs4_lockdata
*p
;
3396 struct inode
*inode
= lsp
->ls_state
->inode
;
3397 struct nfs_server
*server
= NFS_SERVER(inode
);
3399 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
3403 p
->arg
.fh
= NFS_FH(inode
);
3405 p
->arg
.open_seqid
= nfs_alloc_seqid(&lsp
->ls_state
->owner
->so_seqid
);
3406 if (p
->arg
.open_seqid
== NULL
)
3408 p
->arg
.lock_seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3409 if (p
->arg
.lock_seqid
== NULL
)
3410 goto out_free_seqid
;
3411 p
->arg
.lock_stateid
= &lsp
->ls_stateid
;
3412 p
->arg
.lock_owner
.clientid
= server
->nfs_client
->cl_clientid
;
3413 p
->arg
.lock_owner
.id
= lsp
->ls_id
.id
;
3414 p
->res
.lock_seqid
= p
->arg
.lock_seqid
;
3416 atomic_inc(&lsp
->ls_count
);
3417 p
->ctx
= get_nfs_open_context(ctx
);
3418 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3421 nfs_free_seqid(p
->arg
.open_seqid
);
3427 static void nfs4_lock_prepare(struct rpc_task
*task
, void *calldata
)
3429 struct nfs4_lockdata
*data
= calldata
;
3430 struct nfs4_state
*state
= data
->lsp
->ls_state
;
3432 dprintk("%s: begin!\n", __func__
);
3433 if (nfs_wait_on_sequence(data
->arg
.lock_seqid
, task
) != 0)
3435 /* Do we need to do an open_to_lock_owner? */
3436 if (!(data
->arg
.lock_seqid
->sequence
->flags
& NFS_SEQID_CONFIRMED
)) {
3437 if (nfs_wait_on_sequence(data
->arg
.open_seqid
, task
) != 0)
3439 data
->arg
.open_stateid
= &state
->stateid
;
3440 data
->arg
.new_lock_owner
= 1;
3441 data
->res
.open_seqid
= data
->arg
.open_seqid
;
3443 data
->arg
.new_lock_owner
= 0;
3444 data
->timestamp
= jiffies
;
3445 rpc_call_start(task
);
3446 dprintk("%s: done!, ret = %d\n", __func__
, data
->rpc_status
);
3449 static void nfs4_lock_done(struct rpc_task
*task
, void *calldata
)
3451 struct nfs4_lockdata
*data
= calldata
;
3453 dprintk("%s: begin!\n", __func__
);
3455 data
->rpc_status
= task
->tk_status
;
3456 if (RPC_ASSASSINATED(task
))
3458 if (data
->arg
.new_lock_owner
!= 0) {
3459 if (data
->rpc_status
== 0)
3460 nfs_confirm_seqid(&data
->lsp
->ls_seqid
, 0);
3464 if (data
->rpc_status
== 0) {
3465 memcpy(data
->lsp
->ls_stateid
.data
, data
->res
.stateid
.data
,
3466 sizeof(data
->lsp
->ls_stateid
.data
));
3467 data
->lsp
->ls_flags
|= NFS_LOCK_INITIALIZED
;
3468 renew_lease(NFS_SERVER(data
->ctx
->path
.dentry
->d_inode
), data
->timestamp
);
3471 dprintk("%s: done, ret = %d!\n", __func__
, data
->rpc_status
);
3474 static void nfs4_lock_release(void *calldata
)
3476 struct nfs4_lockdata
*data
= calldata
;
3478 dprintk("%s: begin!\n", __func__
);
3479 nfs_free_seqid(data
->arg
.open_seqid
);
3480 if (data
->cancelled
!= 0) {
3481 struct rpc_task
*task
;
3482 task
= nfs4_do_unlck(&data
->fl
, data
->ctx
, data
->lsp
,
3483 data
->arg
.lock_seqid
);
3486 dprintk("%s: cancelling lock!\n", __func__
);
3488 nfs_free_seqid(data
->arg
.lock_seqid
);
3489 nfs4_put_lock_state(data
->lsp
);
3490 put_nfs_open_context(data
->ctx
);
3492 dprintk("%s: done!\n", __func__
);
3495 static const struct rpc_call_ops nfs4_lock_ops
= {
3496 .rpc_call_prepare
= nfs4_lock_prepare
,
3497 .rpc_call_done
= nfs4_lock_done
,
3498 .rpc_release
= nfs4_lock_release
,
3501 static int _nfs4_do_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*fl
, int reclaim
)
3503 struct nfs4_lockdata
*data
;
3504 struct rpc_task
*task
;
3505 struct rpc_message msg
= {
3506 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCK
],
3507 .rpc_cred
= state
->owner
->so_cred
,
3509 struct rpc_task_setup task_setup_data
= {
3510 .rpc_client
= NFS_CLIENT(state
->inode
),
3511 .rpc_message
= &msg
,
3512 .callback_ops
= &nfs4_lock_ops
,
3513 .workqueue
= nfsiod_workqueue
,
3514 .flags
= RPC_TASK_ASYNC
,
3518 dprintk("%s: begin!\n", __func__
);
3519 data
= nfs4_alloc_lockdata(fl
, nfs_file_open_context(fl
->fl_file
),
3520 fl
->fl_u
.nfs4_fl
.owner
);
3524 data
->arg
.block
= 1;
3526 data
->arg
.reclaim
= 1;
3527 msg
.rpc_argp
= &data
->arg
,
3528 msg
.rpc_resp
= &data
->res
,
3529 task_setup_data
.callback_data
= data
;
3530 task
= rpc_run_task(&task_setup_data
);
3532 return PTR_ERR(task
);
3533 ret
= nfs4_wait_for_completion_rpc_task(task
);
3535 ret
= data
->rpc_status
;
3536 if (ret
== -NFS4ERR_DENIED
)
3539 data
->cancelled
= 1;
3541 dprintk("%s: done, ret = %d!\n", __func__
, ret
);
3545 static int nfs4_lock_reclaim(struct nfs4_state
*state
, struct file_lock
*request
)
3547 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3548 struct nfs4_exception exception
= { };
3552 /* Cache the lock if possible... */
3553 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
3555 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 1);
3556 if (err
!= -NFS4ERR_DELAY
)
3558 nfs4_handle_exception(server
, err
, &exception
);
3559 } while (exception
.retry
);
3563 static int nfs4_lock_expired(struct nfs4_state
*state
, struct file_lock
*request
)
3565 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3566 struct nfs4_exception exception
= { };
3569 err
= nfs4_set_lock_state(state
, request
);
3573 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
3575 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 0);
3576 if (err
!= -NFS4ERR_DELAY
)
3578 nfs4_handle_exception(server
, err
, &exception
);
3579 } while (exception
.retry
);
3583 static int _nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3585 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
3586 unsigned char fl_flags
= request
->fl_flags
;
3589 /* Is this a delegated open? */
3590 status
= nfs4_set_lock_state(state
, request
);
3593 request
->fl_flags
|= FL_ACCESS
;
3594 status
= do_vfs_lock(request
->fl_file
, request
);
3597 down_read(&nfsi
->rwsem
);
3598 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
)) {
3599 /* Yes: cache locks! */
3600 /* ...but avoid races with delegation recall... */
3601 request
->fl_flags
= fl_flags
& ~FL_SLEEP
;
3602 status
= do_vfs_lock(request
->fl_file
, request
);
3605 status
= _nfs4_do_setlk(state
, cmd
, request
, 0);
3608 /* Note: we always want to sleep here! */
3609 request
->fl_flags
= fl_flags
| FL_SLEEP
;
3610 if (do_vfs_lock(request
->fl_file
, request
) < 0)
3611 printk(KERN_WARNING
"%s: VFS is out of sync with lock manager!\n", __func__
);
3613 up_read(&nfsi
->rwsem
);
3615 request
->fl_flags
= fl_flags
;
3619 static int nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3621 struct nfs4_exception exception
= { };
3625 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3626 _nfs4_proc_setlk(state
, cmd
, request
),
3628 } while (exception
.retry
);
3633 nfs4_proc_lock(struct file
*filp
, int cmd
, struct file_lock
*request
)
3635 struct nfs_open_context
*ctx
;
3636 struct nfs4_state
*state
;
3637 unsigned long timeout
= NFS4_LOCK_MINTIMEOUT
;
3640 /* verify open state */
3641 ctx
= nfs_file_open_context(filp
);
3644 if (request
->fl_start
< 0 || request
->fl_end
< 0)
3648 return nfs4_proc_getlk(state
, F_GETLK
, request
);
3650 if (!(IS_SETLK(cmd
) || IS_SETLKW(cmd
)))
3653 if (request
->fl_type
== F_UNLCK
)
3654 return nfs4_proc_unlck(state
, cmd
, request
);
3657 status
= nfs4_proc_setlk(state
, cmd
, request
);
3658 if ((status
!= -EAGAIN
) || IS_SETLK(cmd
))
3660 timeout
= nfs4_set_lock_task_retry(timeout
);
3661 status
= -ERESTARTSYS
;
3664 } while(status
< 0);
3668 int nfs4_lock_delegation_recall(struct nfs4_state
*state
, struct file_lock
*fl
)
3670 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3671 struct nfs4_exception exception
= { };
3674 err
= nfs4_set_lock_state(state
, fl
);
3678 err
= _nfs4_do_setlk(state
, F_SETLK
, fl
, 0);
3679 if (err
!= -NFS4ERR_DELAY
)
3681 err
= nfs4_handle_exception(server
, err
, &exception
);
3682 } while (exception
.retry
);
3687 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3689 int nfs4_setxattr(struct dentry
*dentry
, const char *key
, const void *buf
,
3690 size_t buflen
, int flags
)
3692 struct inode
*inode
= dentry
->d_inode
;
3694 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
3697 return nfs4_proc_set_acl(inode
, buf
, buflen
);
3700 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3701 * and that's what we'll do for e.g. user attributes that haven't been set.
3702 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3703 * attributes in kernel-managed attribute namespaces. */
3704 ssize_t
nfs4_getxattr(struct dentry
*dentry
, const char *key
, void *buf
,
3707 struct inode
*inode
= dentry
->d_inode
;
3709 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
3712 return nfs4_proc_get_acl(inode
, buf
, buflen
);
3715 ssize_t
nfs4_listxattr(struct dentry
*dentry
, char *buf
, size_t buflen
)
3717 size_t len
= strlen(XATTR_NAME_NFSV4_ACL
) + 1;
3719 if (!nfs4_server_supports_acls(NFS_SERVER(dentry
->d_inode
)))
3721 if (buf
&& buflen
< len
)
3724 memcpy(buf
, XATTR_NAME_NFSV4_ACL
, len
);
3728 static void nfs_fixup_referral_attributes(struct nfs_fattr
*fattr
)
3730 if (!((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) &&
3731 (fattr
->valid
& NFS_ATTR_FATTR_FSID
) &&
3732 (fattr
->valid
& NFS_ATTR_FATTR_V4_REFERRAL
)))
3735 fattr
->valid
|= NFS_ATTR_FATTR_TYPE
| NFS_ATTR_FATTR_MODE
|
3736 NFS_ATTR_FATTR_NLINK
;
3737 fattr
->mode
= S_IFDIR
| S_IRUGO
| S_IXUGO
;
3741 int nfs4_proc_fs_locations(struct inode
*dir
, const struct qstr
*name
,
3742 struct nfs4_fs_locations
*fs_locations
, struct page
*page
)
3744 struct nfs_server
*server
= NFS_SERVER(dir
);
3746 [0] = FATTR4_WORD0_FSID
| FATTR4_WORD0_FS_LOCATIONS
,
3747 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID
,
3749 struct nfs4_fs_locations_arg args
= {
3750 .dir_fh
= NFS_FH(dir
),
3755 struct nfs4_fs_locations_res res
= {
3756 .fs_locations
= fs_locations
,
3758 struct rpc_message msg
= {
3759 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FS_LOCATIONS
],
3765 dprintk("%s: start\n", __func__
);
3766 nfs_fattr_init(&fs_locations
->fattr
);
3767 fs_locations
->server
= server
;
3768 fs_locations
->nlocations
= 0;
3769 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
3770 nfs_fixup_referral_attributes(&fs_locations
->fattr
);
3771 dprintk("%s: returned status = %d\n", __func__
, status
);
3775 #ifdef CONFIG_NFS_V4_1
3776 /* Destroy the slot table */
3777 static void nfs4_destroy_slot_table(struct nfs4_session
*session
)
3779 if (session
->fc_slot_table
.slots
== NULL
)
3781 kfree(session
->fc_slot_table
.slots
);
3782 session
->fc_slot_table
.slots
= NULL
;
3786 struct nfs4_session
*nfs4_alloc_session(struct nfs_client
*clp
)
3788 struct nfs4_session
*session
;
3789 struct nfs4_slot_table
*tbl
;
3791 session
= kzalloc(sizeof(struct nfs4_session
), GFP_KERNEL
);
3794 tbl
= &session
->fc_slot_table
;
3795 spin_lock_init(&tbl
->slot_tbl_lock
);
3796 rpc_init_wait_queue(&tbl
->slot_tbl_waitq
, "Slot table");
3801 void nfs4_destroy_session(struct nfs4_session
*session
)
3803 nfs4_destroy_slot_table(session
);
3807 #endif /* CONFIG_NFS_V4_1 */
3809 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops
= {
3810 .owner_flag_bit
= NFS_OWNER_RECLAIM_REBOOT
,
3811 .state_flag_bit
= NFS_STATE_RECLAIM_REBOOT
,
3812 .recover_open
= nfs4_open_reclaim
,
3813 .recover_lock
= nfs4_lock_reclaim
,
3816 struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops
= {
3817 .owner_flag_bit
= NFS_OWNER_RECLAIM_NOGRACE
,
3818 .state_flag_bit
= NFS_STATE_RECLAIM_NOGRACE
,
3819 .recover_open
= nfs4_open_expired
,
3820 .recover_lock
= nfs4_lock_expired
,
3823 static const struct inode_operations nfs4_file_inode_operations
= {
3824 .permission
= nfs_permission
,
3825 .getattr
= nfs_getattr
,
3826 .setattr
= nfs_setattr
,
3827 .getxattr
= nfs4_getxattr
,
3828 .setxattr
= nfs4_setxattr
,
3829 .listxattr
= nfs4_listxattr
,
3832 const struct nfs_rpc_ops nfs_v4_clientops
= {
3833 .version
= 4, /* protocol version */
3834 .dentry_ops
= &nfs4_dentry_operations
,
3835 .dir_inode_ops
= &nfs4_dir_inode_operations
,
3836 .file_inode_ops
= &nfs4_file_inode_operations
,
3837 .getroot
= nfs4_proc_get_root
,
3838 .getattr
= nfs4_proc_getattr
,
3839 .setattr
= nfs4_proc_setattr
,
3840 .lookupfh
= nfs4_proc_lookupfh
,
3841 .lookup
= nfs4_proc_lookup
,
3842 .access
= nfs4_proc_access
,
3843 .readlink
= nfs4_proc_readlink
,
3844 .create
= nfs4_proc_create
,
3845 .remove
= nfs4_proc_remove
,
3846 .unlink_setup
= nfs4_proc_unlink_setup
,
3847 .unlink_done
= nfs4_proc_unlink_done
,
3848 .rename
= nfs4_proc_rename
,
3849 .link
= nfs4_proc_link
,
3850 .symlink
= nfs4_proc_symlink
,
3851 .mkdir
= nfs4_proc_mkdir
,
3852 .rmdir
= nfs4_proc_remove
,
3853 .readdir
= nfs4_proc_readdir
,
3854 .mknod
= nfs4_proc_mknod
,
3855 .statfs
= nfs4_proc_statfs
,
3856 .fsinfo
= nfs4_proc_fsinfo
,
3857 .pathconf
= nfs4_proc_pathconf
,
3858 .set_capabilities
= nfs4_server_capabilities
,
3859 .decode_dirent
= nfs4_decode_dirent
,
3860 .read_setup
= nfs4_proc_read_setup
,
3861 .read_done
= nfs4_read_done
,
3862 .write_setup
= nfs4_proc_write_setup
,
3863 .write_done
= nfs4_write_done
,
3864 .commit_setup
= nfs4_proc_commit_setup
,
3865 .commit_done
= nfs4_commit_done
,
3866 .lock
= nfs4_proc_lock
,
3867 .clear_acl_cache
= nfs4_zap_acl_attr
,
3868 .close_context
= nfs4_close_context
,