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 return rpc_call_sync(server
->client
, msg
, 0);
297 #define nfs4_call_sync(server, msg, args, res, cache_reply) \
298 (server)->nfs_client->cl_call_sync((server), (msg), &(args)->seq_args, \
299 &(res)->seq_res, (cache_reply))
301 static void update_changeattr(struct inode
*dir
, struct nfs4_change_info
*cinfo
)
303 struct nfs_inode
*nfsi
= NFS_I(dir
);
305 spin_lock(&dir
->i_lock
);
306 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
|NFS_INO_INVALID_DATA
;
307 if (!cinfo
->atomic
|| cinfo
->before
!= nfsi
->change_attr
)
308 nfs_force_lookup_revalidate(dir
);
309 nfsi
->change_attr
= cinfo
->after
;
310 spin_unlock(&dir
->i_lock
);
313 struct nfs4_opendata
{
315 struct nfs_openargs o_arg
;
316 struct nfs_openres o_res
;
317 struct nfs_open_confirmargs c_arg
;
318 struct nfs_open_confirmres c_res
;
319 struct nfs_fattr f_attr
;
320 struct nfs_fattr dir_attr
;
323 struct nfs4_state_owner
*owner
;
324 struct nfs4_state
*state
;
326 unsigned long timestamp
;
327 unsigned int rpc_done
: 1;
333 static void nfs4_init_opendata_res(struct nfs4_opendata
*p
)
335 p
->o_res
.f_attr
= &p
->f_attr
;
336 p
->o_res
.dir_attr
= &p
->dir_attr
;
337 p
->o_res
.seqid
= p
->o_arg
.seqid
;
338 p
->c_res
.seqid
= p
->c_arg
.seqid
;
339 p
->o_res
.server
= p
->o_arg
.server
;
340 nfs_fattr_init(&p
->f_attr
);
341 nfs_fattr_init(&p
->dir_attr
);
344 static struct nfs4_opendata
*nfs4_opendata_alloc(struct path
*path
,
345 struct nfs4_state_owner
*sp
, fmode_t fmode
, int flags
,
346 const struct iattr
*attrs
)
348 struct dentry
*parent
= dget_parent(path
->dentry
);
349 struct inode
*dir
= parent
->d_inode
;
350 struct nfs_server
*server
= NFS_SERVER(dir
);
351 struct nfs4_opendata
*p
;
353 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
356 p
->o_arg
.seqid
= nfs_alloc_seqid(&sp
->so_seqid
);
357 if (p
->o_arg
.seqid
== NULL
)
359 p
->path
.mnt
= mntget(path
->mnt
);
360 p
->path
.dentry
= dget(path
->dentry
);
363 atomic_inc(&sp
->so_count
);
364 p
->o_arg
.fh
= NFS_FH(dir
);
365 p
->o_arg
.open_flags
= flags
;
366 p
->o_arg
.fmode
= fmode
& (FMODE_READ
|FMODE_WRITE
);
367 p
->o_arg
.clientid
= server
->nfs_client
->cl_clientid
;
368 p
->o_arg
.id
= sp
->so_owner_id
.id
;
369 p
->o_arg
.name
= &p
->path
.dentry
->d_name
;
370 p
->o_arg
.server
= server
;
371 p
->o_arg
.bitmask
= server
->attr_bitmask
;
372 p
->o_arg
.claim
= NFS4_OPEN_CLAIM_NULL
;
373 if (flags
& O_EXCL
) {
374 u32
*s
= (u32
*) p
->o_arg
.u
.verifier
.data
;
377 } else if (flags
& O_CREAT
) {
378 p
->o_arg
.u
.attrs
= &p
->attrs
;
379 memcpy(&p
->attrs
, attrs
, sizeof(p
->attrs
));
381 p
->c_arg
.fh
= &p
->o_res
.fh
;
382 p
->c_arg
.stateid
= &p
->o_res
.stateid
;
383 p
->c_arg
.seqid
= p
->o_arg
.seqid
;
384 nfs4_init_opendata_res(p
);
394 static void nfs4_opendata_free(struct kref
*kref
)
396 struct nfs4_opendata
*p
= container_of(kref
,
397 struct nfs4_opendata
, kref
);
399 nfs_free_seqid(p
->o_arg
.seqid
);
400 if (p
->state
!= NULL
)
401 nfs4_put_open_state(p
->state
);
402 nfs4_put_state_owner(p
->owner
);
408 static void nfs4_opendata_put(struct nfs4_opendata
*p
)
411 kref_put(&p
->kref
, nfs4_opendata_free
);
414 static int nfs4_wait_for_completion_rpc_task(struct rpc_task
*task
)
418 ret
= rpc_wait_for_completion_task(task
);
422 static int can_open_cached(struct nfs4_state
*state
, fmode_t mode
, int open_mode
)
426 if (open_mode
& O_EXCL
)
428 switch (mode
& (FMODE_READ
|FMODE_WRITE
)) {
430 ret
|= test_bit(NFS_O_RDONLY_STATE
, &state
->flags
) != 0;
433 ret
|= test_bit(NFS_O_WRONLY_STATE
, &state
->flags
) != 0;
435 case FMODE_READ
|FMODE_WRITE
:
436 ret
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
) != 0;
442 static int can_open_delegated(struct nfs_delegation
*delegation
, fmode_t fmode
)
444 if ((delegation
->type
& fmode
) != fmode
)
446 if (test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
))
448 nfs_mark_delegation_referenced(delegation
);
452 static void update_open_stateflags(struct nfs4_state
*state
, fmode_t fmode
)
461 case FMODE_READ
|FMODE_WRITE
:
464 nfs4_state_set_mode_locked(state
, state
->state
| fmode
);
467 static void nfs_set_open_stateid_locked(struct nfs4_state
*state
, nfs4_stateid
*stateid
, fmode_t fmode
)
469 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0)
470 memcpy(state
->stateid
.data
, stateid
->data
, sizeof(state
->stateid
.data
));
471 memcpy(state
->open_stateid
.data
, stateid
->data
, sizeof(state
->open_stateid
.data
));
474 set_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
477 set_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
479 case FMODE_READ
|FMODE_WRITE
:
480 set_bit(NFS_O_RDWR_STATE
, &state
->flags
);
484 static void nfs_set_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*stateid
, fmode_t fmode
)
486 write_seqlock(&state
->seqlock
);
487 nfs_set_open_stateid_locked(state
, stateid
, fmode
);
488 write_sequnlock(&state
->seqlock
);
491 static void __update_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*open_stateid
, const nfs4_stateid
*deleg_stateid
, fmode_t fmode
)
494 * Protect the call to nfs4_state_set_mode_locked and
495 * serialise the stateid update
497 write_seqlock(&state
->seqlock
);
498 if (deleg_stateid
!= NULL
) {
499 memcpy(state
->stateid
.data
, deleg_stateid
->data
, sizeof(state
->stateid
.data
));
500 set_bit(NFS_DELEGATED_STATE
, &state
->flags
);
502 if (open_stateid
!= NULL
)
503 nfs_set_open_stateid_locked(state
, open_stateid
, fmode
);
504 write_sequnlock(&state
->seqlock
);
505 spin_lock(&state
->owner
->so_lock
);
506 update_open_stateflags(state
, fmode
);
507 spin_unlock(&state
->owner
->so_lock
);
510 static int update_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*open_stateid
, nfs4_stateid
*delegation
, fmode_t fmode
)
512 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
513 struct nfs_delegation
*deleg_cur
;
516 fmode
&= (FMODE_READ
|FMODE_WRITE
);
519 deleg_cur
= rcu_dereference(nfsi
->delegation
);
520 if (deleg_cur
== NULL
)
523 spin_lock(&deleg_cur
->lock
);
524 if (nfsi
->delegation
!= deleg_cur
||
525 (deleg_cur
->type
& fmode
) != fmode
)
526 goto no_delegation_unlock
;
528 if (delegation
== NULL
)
529 delegation
= &deleg_cur
->stateid
;
530 else if (memcmp(deleg_cur
->stateid
.data
, delegation
->data
, NFS4_STATEID_SIZE
) != 0)
531 goto no_delegation_unlock
;
533 nfs_mark_delegation_referenced(deleg_cur
);
534 __update_open_stateid(state
, open_stateid
, &deleg_cur
->stateid
, fmode
);
536 no_delegation_unlock
:
537 spin_unlock(&deleg_cur
->lock
);
541 if (!ret
&& open_stateid
!= NULL
) {
542 __update_open_stateid(state
, open_stateid
, NULL
, fmode
);
550 static void nfs4_return_incompatible_delegation(struct inode
*inode
, fmode_t fmode
)
552 struct nfs_delegation
*delegation
;
555 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
556 if (delegation
== NULL
|| (delegation
->type
& fmode
) == fmode
) {
561 nfs_inode_return_delegation(inode
);
564 static struct nfs4_state
*nfs4_try_open_cached(struct nfs4_opendata
*opendata
)
566 struct nfs4_state
*state
= opendata
->state
;
567 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
568 struct nfs_delegation
*delegation
;
569 int open_mode
= opendata
->o_arg
.open_flags
& O_EXCL
;
570 fmode_t fmode
= opendata
->o_arg
.fmode
;
571 nfs4_stateid stateid
;
575 if (can_open_cached(state
, fmode
, open_mode
)) {
576 spin_lock(&state
->owner
->so_lock
);
577 if (can_open_cached(state
, fmode
, open_mode
)) {
578 update_open_stateflags(state
, fmode
);
579 spin_unlock(&state
->owner
->so_lock
);
580 goto out_return_state
;
582 spin_unlock(&state
->owner
->so_lock
);
585 delegation
= rcu_dereference(nfsi
->delegation
);
586 if (delegation
== NULL
||
587 !can_open_delegated(delegation
, fmode
)) {
591 /* Save the delegation */
592 memcpy(stateid
.data
, delegation
->stateid
.data
, sizeof(stateid
.data
));
594 ret
= nfs_may_open(state
->inode
, state
->owner
->so_cred
, open_mode
);
599 /* Try to update the stateid using the delegation */
600 if (update_open_stateid(state
, NULL
, &stateid
, fmode
))
601 goto out_return_state
;
606 atomic_inc(&state
->count
);
610 static struct nfs4_state
*nfs4_opendata_to_nfs4_state(struct nfs4_opendata
*data
)
613 struct nfs4_state
*state
= NULL
;
614 struct nfs_delegation
*delegation
;
617 if (!data
->rpc_done
) {
618 state
= nfs4_try_open_cached(data
);
623 if (!(data
->f_attr
.valid
& NFS_ATTR_FATTR
))
625 inode
= nfs_fhget(data
->dir
->d_sb
, &data
->o_res
.fh
, &data
->f_attr
);
626 ret
= PTR_ERR(inode
);
630 state
= nfs4_get_open_state(inode
, data
->owner
);
633 if (data
->o_res
.delegation_type
!= 0) {
634 int delegation_flags
= 0;
637 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
639 delegation_flags
= delegation
->flags
;
641 if ((delegation_flags
& 1UL<<NFS_DELEGATION_NEED_RECLAIM
) == 0)
642 nfs_inode_set_delegation(state
->inode
,
643 data
->owner
->so_cred
,
646 nfs_inode_reclaim_delegation(state
->inode
,
647 data
->owner
->so_cred
,
651 update_open_stateid(state
, &data
->o_res
.stateid
, NULL
,
662 static struct nfs_open_context
*nfs4_state_find_open_context(struct nfs4_state
*state
)
664 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
665 struct nfs_open_context
*ctx
;
667 spin_lock(&state
->inode
->i_lock
);
668 list_for_each_entry(ctx
, &nfsi
->open_files
, list
) {
669 if (ctx
->state
!= state
)
671 get_nfs_open_context(ctx
);
672 spin_unlock(&state
->inode
->i_lock
);
675 spin_unlock(&state
->inode
->i_lock
);
676 return ERR_PTR(-ENOENT
);
679 static struct nfs4_opendata
*nfs4_open_recoverdata_alloc(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
681 struct nfs4_opendata
*opendata
;
683 opendata
= nfs4_opendata_alloc(&ctx
->path
, state
->owner
, 0, 0, NULL
);
684 if (opendata
== NULL
)
685 return ERR_PTR(-ENOMEM
);
686 opendata
->state
= state
;
687 atomic_inc(&state
->count
);
691 static int nfs4_open_recover_helper(struct nfs4_opendata
*opendata
, fmode_t fmode
, struct nfs4_state
**res
)
693 struct nfs4_state
*newstate
;
696 opendata
->o_arg
.open_flags
= 0;
697 opendata
->o_arg
.fmode
= fmode
;
698 memset(&opendata
->o_res
, 0, sizeof(opendata
->o_res
));
699 memset(&opendata
->c_res
, 0, sizeof(opendata
->c_res
));
700 nfs4_init_opendata_res(opendata
);
701 ret
= _nfs4_proc_open(opendata
);
704 newstate
= nfs4_opendata_to_nfs4_state(opendata
);
705 if (IS_ERR(newstate
))
706 return PTR_ERR(newstate
);
707 nfs4_close_state(&opendata
->path
, newstate
, fmode
);
712 static int nfs4_open_recover(struct nfs4_opendata
*opendata
, struct nfs4_state
*state
)
714 struct nfs4_state
*newstate
;
717 /* memory barrier prior to reading state->n_* */
718 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
720 if (state
->n_rdwr
!= 0) {
721 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
|FMODE_WRITE
, &newstate
);
724 if (newstate
!= state
)
727 if (state
->n_wronly
!= 0) {
728 ret
= nfs4_open_recover_helper(opendata
, FMODE_WRITE
, &newstate
);
731 if (newstate
!= state
)
734 if (state
->n_rdonly
!= 0) {
735 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
, &newstate
);
738 if (newstate
!= state
)
742 * We may have performed cached opens for all three recoveries.
743 * Check if we need to update the current stateid.
745 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0 &&
746 memcmp(state
->stateid
.data
, state
->open_stateid
.data
, sizeof(state
->stateid
.data
)) != 0) {
747 write_seqlock(&state
->seqlock
);
748 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0)
749 memcpy(state
->stateid
.data
, state
->open_stateid
.data
, sizeof(state
->stateid
.data
));
750 write_sequnlock(&state
->seqlock
);
757 * reclaim state on the server after a reboot.
759 static int _nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
761 struct nfs_delegation
*delegation
;
762 struct nfs4_opendata
*opendata
;
763 fmode_t delegation_type
= 0;
766 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
767 if (IS_ERR(opendata
))
768 return PTR_ERR(opendata
);
769 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_PREVIOUS
;
770 opendata
->o_arg
.fh
= NFS_FH(state
->inode
);
772 delegation
= rcu_dereference(NFS_I(state
->inode
)->delegation
);
773 if (delegation
!= NULL
&& test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
) != 0)
774 delegation_type
= delegation
->type
;
776 opendata
->o_arg
.u
.delegation_type
= delegation_type
;
777 status
= nfs4_open_recover(opendata
, state
);
778 nfs4_opendata_put(opendata
);
782 static int nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
784 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
785 struct nfs4_exception exception
= { };
788 err
= _nfs4_do_open_reclaim(ctx
, state
);
789 if (err
!= -NFS4ERR_DELAY
)
791 nfs4_handle_exception(server
, err
, &exception
);
792 } while (exception
.retry
);
796 static int nfs4_open_reclaim(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
798 struct nfs_open_context
*ctx
;
801 ctx
= nfs4_state_find_open_context(state
);
804 ret
= nfs4_do_open_reclaim(ctx
, state
);
805 put_nfs_open_context(ctx
);
809 static int _nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
811 struct nfs4_opendata
*opendata
;
814 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
815 if (IS_ERR(opendata
))
816 return PTR_ERR(opendata
);
817 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_DELEGATE_CUR
;
818 memcpy(opendata
->o_arg
.u
.delegation
.data
, stateid
->data
,
819 sizeof(opendata
->o_arg
.u
.delegation
.data
));
820 ret
= nfs4_open_recover(opendata
, state
);
821 nfs4_opendata_put(opendata
);
825 int nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
827 struct nfs4_exception exception
= { };
828 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
831 err
= _nfs4_open_delegation_recall(ctx
, state
, stateid
);
835 case -NFS4ERR_STALE_CLIENTID
:
836 case -NFS4ERR_STALE_STATEID
:
837 case -NFS4ERR_EXPIRED
:
838 /* Don't recall a delegation if it was lost */
839 nfs4_schedule_state_recovery(server
->nfs_client
);
842 err
= nfs4_handle_exception(server
, err
, &exception
);
843 } while (exception
.retry
);
847 static void nfs4_open_confirm_done(struct rpc_task
*task
, void *calldata
)
849 struct nfs4_opendata
*data
= calldata
;
851 data
->rpc_status
= task
->tk_status
;
852 if (RPC_ASSASSINATED(task
))
854 if (data
->rpc_status
== 0) {
855 memcpy(data
->o_res
.stateid
.data
, data
->c_res
.stateid
.data
,
856 sizeof(data
->o_res
.stateid
.data
));
857 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
858 renew_lease(data
->o_res
.server
, data
->timestamp
);
863 static void nfs4_open_confirm_release(void *calldata
)
865 struct nfs4_opendata
*data
= calldata
;
866 struct nfs4_state
*state
= NULL
;
868 /* If this request hasn't been cancelled, do nothing */
869 if (data
->cancelled
== 0)
871 /* In case of error, no cleanup! */
874 state
= nfs4_opendata_to_nfs4_state(data
);
876 nfs4_close_state(&data
->path
, state
, data
->o_arg
.fmode
);
878 nfs4_opendata_put(data
);
881 static const struct rpc_call_ops nfs4_open_confirm_ops
= {
882 .rpc_call_done
= nfs4_open_confirm_done
,
883 .rpc_release
= nfs4_open_confirm_release
,
887 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
889 static int _nfs4_proc_open_confirm(struct nfs4_opendata
*data
)
891 struct nfs_server
*server
= NFS_SERVER(data
->dir
->d_inode
);
892 struct rpc_task
*task
;
893 struct rpc_message msg
= {
894 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_CONFIRM
],
895 .rpc_argp
= &data
->c_arg
,
896 .rpc_resp
= &data
->c_res
,
897 .rpc_cred
= data
->owner
->so_cred
,
899 struct rpc_task_setup task_setup_data
= {
900 .rpc_client
= server
->client
,
902 .callback_ops
= &nfs4_open_confirm_ops
,
903 .callback_data
= data
,
904 .workqueue
= nfsiod_workqueue
,
905 .flags
= RPC_TASK_ASYNC
,
909 kref_get(&data
->kref
);
911 data
->rpc_status
= 0;
912 data
->timestamp
= jiffies
;
913 task
= rpc_run_task(&task_setup_data
);
915 return PTR_ERR(task
);
916 status
= nfs4_wait_for_completion_rpc_task(task
);
921 status
= data
->rpc_status
;
926 static void nfs4_open_prepare(struct rpc_task
*task
, void *calldata
)
928 struct nfs4_opendata
*data
= calldata
;
929 struct nfs4_state_owner
*sp
= data
->owner
;
931 if (nfs_wait_on_sequence(data
->o_arg
.seqid
, task
) != 0)
934 * Check if we still need to send an OPEN call, or if we can use
935 * a delegation instead.
937 if (data
->state
!= NULL
) {
938 struct nfs_delegation
*delegation
;
940 if (can_open_cached(data
->state
, data
->o_arg
.fmode
, data
->o_arg
.open_flags
))
943 delegation
= rcu_dereference(NFS_I(data
->state
->inode
)->delegation
);
944 if (delegation
!= NULL
&&
945 test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
) == 0) {
951 /* Update sequence id. */
952 data
->o_arg
.id
= sp
->so_owner_id
.id
;
953 data
->o_arg
.clientid
= sp
->so_client
->cl_clientid
;
954 if (data
->o_arg
.claim
== NFS4_OPEN_CLAIM_PREVIOUS
) {
955 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_NOATTR
];
956 nfs_copy_fh(&data
->o_res
.fh
, data
->o_arg
.fh
);
958 data
->timestamp
= jiffies
;
959 rpc_call_start(task
);
962 task
->tk_action
= NULL
;
966 static void nfs4_open_done(struct rpc_task
*task
, void *calldata
)
968 struct nfs4_opendata
*data
= calldata
;
970 data
->rpc_status
= task
->tk_status
;
971 if (RPC_ASSASSINATED(task
))
973 if (task
->tk_status
== 0) {
974 switch (data
->o_res
.f_attr
->mode
& S_IFMT
) {
978 data
->rpc_status
= -ELOOP
;
981 data
->rpc_status
= -EISDIR
;
984 data
->rpc_status
= -ENOTDIR
;
986 renew_lease(data
->o_res
.server
, data
->timestamp
);
987 if (!(data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
))
988 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
993 static void nfs4_open_release(void *calldata
)
995 struct nfs4_opendata
*data
= calldata
;
996 struct nfs4_state
*state
= NULL
;
998 /* If this request hasn't been cancelled, do nothing */
999 if (data
->cancelled
== 0)
1001 /* In case of error, no cleanup! */
1002 if (data
->rpc_status
!= 0 || !data
->rpc_done
)
1004 /* In case we need an open_confirm, no cleanup! */
1005 if (data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
)
1007 state
= nfs4_opendata_to_nfs4_state(data
);
1009 nfs4_close_state(&data
->path
, state
, data
->o_arg
.fmode
);
1011 nfs4_opendata_put(data
);
1014 static const struct rpc_call_ops nfs4_open_ops
= {
1015 .rpc_call_prepare
= nfs4_open_prepare
,
1016 .rpc_call_done
= nfs4_open_done
,
1017 .rpc_release
= nfs4_open_release
,
1021 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
1023 static int _nfs4_proc_open(struct nfs4_opendata
*data
)
1025 struct inode
*dir
= data
->dir
->d_inode
;
1026 struct nfs_server
*server
= NFS_SERVER(dir
);
1027 struct nfs_openargs
*o_arg
= &data
->o_arg
;
1028 struct nfs_openres
*o_res
= &data
->o_res
;
1029 struct rpc_task
*task
;
1030 struct rpc_message msg
= {
1031 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN
],
1034 .rpc_cred
= data
->owner
->so_cred
,
1036 struct rpc_task_setup task_setup_data
= {
1037 .rpc_client
= server
->client
,
1038 .rpc_message
= &msg
,
1039 .callback_ops
= &nfs4_open_ops
,
1040 .callback_data
= data
,
1041 .workqueue
= nfsiod_workqueue
,
1042 .flags
= RPC_TASK_ASYNC
,
1046 kref_get(&data
->kref
);
1048 data
->rpc_status
= 0;
1049 data
->cancelled
= 0;
1050 task
= rpc_run_task(&task_setup_data
);
1052 return PTR_ERR(task
);
1053 status
= nfs4_wait_for_completion_rpc_task(task
);
1055 data
->cancelled
= 1;
1058 status
= data
->rpc_status
;
1060 if (status
!= 0 || !data
->rpc_done
)
1063 if (o_res
->fh
.size
== 0)
1064 _nfs4_proc_lookup(dir
, o_arg
->name
, &o_res
->fh
, o_res
->f_attr
);
1066 if (o_arg
->open_flags
& O_CREAT
) {
1067 update_changeattr(dir
, &o_res
->cinfo
);
1068 nfs_post_op_update_inode(dir
, o_res
->dir_attr
);
1070 nfs_refresh_inode(dir
, o_res
->dir_attr
);
1071 if(o_res
->rflags
& NFS4_OPEN_RESULT_CONFIRM
) {
1072 status
= _nfs4_proc_open_confirm(data
);
1076 if (!(o_res
->f_attr
->valid
& NFS_ATTR_FATTR
))
1077 _nfs4_proc_getattr(server
, &o_res
->fh
, o_res
->f_attr
);
1081 static int nfs4_recover_expired_lease(struct nfs_server
*server
)
1083 struct nfs_client
*clp
= server
->nfs_client
;
1087 ret
= nfs4_wait_clnt_recover(clp
);
1090 if (!test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) &&
1091 !test_bit(NFS4CLNT_CHECK_LEASE
,&clp
->cl_state
))
1093 nfs4_schedule_state_recovery(clp
);
1100 * reclaim state on the server after a network partition.
1101 * Assumes caller holds the appropriate lock
1103 static int _nfs4_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1105 struct nfs4_opendata
*opendata
;
1108 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
1109 if (IS_ERR(opendata
))
1110 return PTR_ERR(opendata
);
1111 ret
= nfs4_open_recover(opendata
, state
);
1113 d_drop(ctx
->path
.dentry
);
1114 nfs4_opendata_put(opendata
);
1118 static inline int nfs4_do_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1120 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1121 struct nfs4_exception exception
= { };
1125 err
= _nfs4_open_expired(ctx
, state
);
1126 if (err
!= -NFS4ERR_DELAY
)
1128 nfs4_handle_exception(server
, err
, &exception
);
1129 } while (exception
.retry
);
1133 static int nfs4_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
1135 struct nfs_open_context
*ctx
;
1138 ctx
= nfs4_state_find_open_context(state
);
1140 return PTR_ERR(ctx
);
1141 ret
= nfs4_do_open_expired(ctx
, state
);
1142 put_nfs_open_context(ctx
);
1147 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1148 * fields corresponding to attributes that were used to store the verifier.
1149 * Make sure we clobber those fields in the later setattr call
1151 static inline void nfs4_exclusive_attrset(struct nfs4_opendata
*opendata
, struct iattr
*sattr
)
1153 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_ACCESS
) &&
1154 !(sattr
->ia_valid
& ATTR_ATIME_SET
))
1155 sattr
->ia_valid
|= ATTR_ATIME
;
1157 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_MODIFY
) &&
1158 !(sattr
->ia_valid
& ATTR_MTIME_SET
))
1159 sattr
->ia_valid
|= ATTR_MTIME
;
1163 * Returns a referenced nfs4_state
1165 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
)
1167 struct nfs4_state_owner
*sp
;
1168 struct nfs4_state
*state
= NULL
;
1169 struct nfs_server
*server
= NFS_SERVER(dir
);
1170 struct nfs4_opendata
*opendata
;
1173 /* Protect against reboot recovery conflicts */
1175 if (!(sp
= nfs4_get_state_owner(server
, cred
))) {
1176 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1179 status
= nfs4_recover_expired_lease(server
);
1181 goto err_put_state_owner
;
1182 if (path
->dentry
->d_inode
!= NULL
)
1183 nfs4_return_incompatible_delegation(path
->dentry
->d_inode
, fmode
);
1185 opendata
= nfs4_opendata_alloc(path
, sp
, fmode
, flags
, sattr
);
1186 if (opendata
== NULL
)
1187 goto err_put_state_owner
;
1189 if (path
->dentry
->d_inode
!= NULL
)
1190 opendata
->state
= nfs4_get_open_state(path
->dentry
->d_inode
, sp
);
1192 status
= _nfs4_proc_open(opendata
);
1194 goto err_opendata_put
;
1196 if (opendata
->o_arg
.open_flags
& O_EXCL
)
1197 nfs4_exclusive_attrset(opendata
, sattr
);
1199 state
= nfs4_opendata_to_nfs4_state(opendata
);
1200 status
= PTR_ERR(state
);
1202 goto err_opendata_put
;
1203 nfs4_opendata_put(opendata
);
1204 nfs4_put_state_owner(sp
);
1208 nfs4_opendata_put(opendata
);
1209 err_put_state_owner
:
1210 nfs4_put_state_owner(sp
);
1217 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
)
1219 struct nfs4_exception exception
= { };
1220 struct nfs4_state
*res
;
1224 status
= _nfs4_do_open(dir
, path
, fmode
, flags
, sattr
, cred
, &res
);
1227 /* NOTE: BAD_SEQID means the server and client disagree about the
1228 * book-keeping w.r.t. state-changing operations
1229 * (OPEN/CLOSE/LOCK/LOCKU...)
1230 * It is actually a sign of a bug on the client or on the server.
1232 * If we receive a BAD_SEQID error in the particular case of
1233 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1234 * have unhashed the old state_owner for us, and that we can
1235 * therefore safely retry using a new one. We should still warn
1236 * the user though...
1238 if (status
== -NFS4ERR_BAD_SEQID
) {
1239 printk(KERN_WARNING
"NFS: v4 server %s "
1240 " returned a bad sequence-id error!\n",
1241 NFS_SERVER(dir
)->nfs_client
->cl_hostname
);
1242 exception
.retry
= 1;
1246 * BAD_STATEID on OPEN means that the server cancelled our
1247 * state before it received the OPEN_CONFIRM.
1248 * Recover by retrying the request as per the discussion
1249 * on Page 181 of RFC3530.
1251 if (status
== -NFS4ERR_BAD_STATEID
) {
1252 exception
.retry
= 1;
1255 if (status
== -EAGAIN
) {
1256 /* We must have found a delegation */
1257 exception
.retry
= 1;
1260 res
= ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir
),
1261 status
, &exception
));
1262 } while (exception
.retry
);
1266 static int _nfs4_do_setattr(struct inode
*inode
, struct rpc_cred
*cred
,
1267 struct nfs_fattr
*fattr
, struct iattr
*sattr
,
1268 struct nfs4_state
*state
)
1270 struct nfs_server
*server
= NFS_SERVER(inode
);
1271 struct nfs_setattrargs arg
= {
1272 .fh
= NFS_FH(inode
),
1275 .bitmask
= server
->attr_bitmask
,
1277 struct nfs_setattrres res
= {
1281 struct rpc_message msg
= {
1282 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETATTR
],
1287 unsigned long timestamp
= jiffies
;
1290 nfs_fattr_init(fattr
);
1292 if (nfs4_copy_delegation_stateid(&arg
.stateid
, inode
)) {
1293 /* Use that stateid */
1294 } else if (state
!= NULL
) {
1295 nfs4_copy_stateid(&arg
.stateid
, state
, current
->files
);
1297 memcpy(&arg
.stateid
, &zero_stateid
, sizeof(arg
.stateid
));
1299 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
1300 if (status
== 0 && state
!= NULL
)
1301 renew_lease(server
, timestamp
);
1305 static int nfs4_do_setattr(struct inode
*inode
, struct rpc_cred
*cred
,
1306 struct nfs_fattr
*fattr
, struct iattr
*sattr
,
1307 struct nfs4_state
*state
)
1309 struct nfs_server
*server
= NFS_SERVER(inode
);
1310 struct nfs4_exception exception
= { };
1313 err
= nfs4_handle_exception(server
,
1314 _nfs4_do_setattr(inode
, cred
, fattr
, sattr
, state
),
1316 } while (exception
.retry
);
1320 struct nfs4_closedata
{
1322 struct inode
*inode
;
1323 struct nfs4_state
*state
;
1324 struct nfs_closeargs arg
;
1325 struct nfs_closeres res
;
1326 struct nfs_fattr fattr
;
1327 unsigned long timestamp
;
1330 static void nfs4_free_closedata(void *data
)
1332 struct nfs4_closedata
*calldata
= data
;
1333 struct nfs4_state_owner
*sp
= calldata
->state
->owner
;
1335 nfs4_put_open_state(calldata
->state
);
1336 nfs_free_seqid(calldata
->arg
.seqid
);
1337 nfs4_put_state_owner(sp
);
1338 path_put(&calldata
->path
);
1342 static void nfs4_close_done(struct rpc_task
*task
, void *data
)
1344 struct nfs4_closedata
*calldata
= data
;
1345 struct nfs4_state
*state
= calldata
->state
;
1346 struct nfs_server
*server
= NFS_SERVER(calldata
->inode
);
1348 if (RPC_ASSASSINATED(task
))
1350 /* hmm. we are done with the inode, and in the process of freeing
1351 * the state_owner. we keep this around to process errors
1353 switch (task
->tk_status
) {
1355 nfs_set_open_stateid(state
, &calldata
->res
.stateid
, 0);
1356 renew_lease(server
, calldata
->timestamp
);
1358 case -NFS4ERR_STALE_STATEID
:
1359 case -NFS4ERR_OLD_STATEID
:
1360 case -NFS4ERR_BAD_STATEID
:
1361 case -NFS4ERR_EXPIRED
:
1362 if (calldata
->arg
.fmode
== 0)
1365 if (nfs4_async_handle_error(task
, server
, state
) == -EAGAIN
) {
1366 rpc_restart_call(task
);
1370 nfs_refresh_inode(calldata
->inode
, calldata
->res
.fattr
);
1373 static void nfs4_close_prepare(struct rpc_task
*task
, void *data
)
1375 struct nfs4_closedata
*calldata
= data
;
1376 struct nfs4_state
*state
= calldata
->state
;
1377 int clear_rd
, clear_wr
, clear_rdwr
;
1379 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
1382 clear_rd
= clear_wr
= clear_rdwr
= 0;
1383 spin_lock(&state
->owner
->so_lock
);
1384 /* Calculate the change in open mode */
1385 if (state
->n_rdwr
== 0) {
1386 if (state
->n_rdonly
== 0) {
1387 clear_rd
|= test_and_clear_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
1388 clear_rdwr
|= test_and_clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1390 if (state
->n_wronly
== 0) {
1391 clear_wr
|= test_and_clear_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
1392 clear_rdwr
|= test_and_clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1395 spin_unlock(&state
->owner
->so_lock
);
1396 if (!clear_rd
&& !clear_wr
&& !clear_rdwr
) {
1397 /* Note: exit _without_ calling nfs4_close_done */
1398 task
->tk_action
= NULL
;
1401 nfs_fattr_init(calldata
->res
.fattr
);
1402 if (test_bit(NFS_O_RDONLY_STATE
, &state
->flags
) != 0) {
1403 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_DOWNGRADE
];
1404 calldata
->arg
.fmode
= FMODE_READ
;
1405 } else if (test_bit(NFS_O_WRONLY_STATE
, &state
->flags
) != 0) {
1406 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_DOWNGRADE
];
1407 calldata
->arg
.fmode
= FMODE_WRITE
;
1409 calldata
->timestamp
= jiffies
;
1410 rpc_call_start(task
);
1413 static const struct rpc_call_ops nfs4_close_ops
= {
1414 .rpc_call_prepare
= nfs4_close_prepare
,
1415 .rpc_call_done
= nfs4_close_done
,
1416 .rpc_release
= nfs4_free_closedata
,
1420 * It is possible for data to be read/written from a mem-mapped file
1421 * after the sys_close call (which hits the vfs layer as a flush).
1422 * This means that we can't safely call nfsv4 close on a file until
1423 * the inode is cleared. This in turn means that we are not good
1424 * NFSv4 citizens - we do not indicate to the server to update the file's
1425 * share state even when we are done with one of the three share
1426 * stateid's in the inode.
1428 * NOTE: Caller must be holding the sp->so_owner semaphore!
1430 int nfs4_do_close(struct path
*path
, struct nfs4_state
*state
, int wait
)
1432 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1433 struct nfs4_closedata
*calldata
;
1434 struct nfs4_state_owner
*sp
= state
->owner
;
1435 struct rpc_task
*task
;
1436 struct rpc_message msg
= {
1437 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CLOSE
],
1438 .rpc_cred
= state
->owner
->so_cred
,
1440 struct rpc_task_setup task_setup_data
= {
1441 .rpc_client
= server
->client
,
1442 .rpc_message
= &msg
,
1443 .callback_ops
= &nfs4_close_ops
,
1444 .workqueue
= nfsiod_workqueue
,
1445 .flags
= RPC_TASK_ASYNC
,
1447 int status
= -ENOMEM
;
1449 calldata
= kmalloc(sizeof(*calldata
), GFP_KERNEL
);
1450 if (calldata
== NULL
)
1452 calldata
->inode
= state
->inode
;
1453 calldata
->state
= state
;
1454 calldata
->arg
.fh
= NFS_FH(state
->inode
);
1455 calldata
->arg
.stateid
= &state
->open_stateid
;
1456 /* Serialization for the sequence id */
1457 calldata
->arg
.seqid
= nfs_alloc_seqid(&state
->owner
->so_seqid
);
1458 if (calldata
->arg
.seqid
== NULL
)
1459 goto out_free_calldata
;
1460 calldata
->arg
.fmode
= 0;
1461 calldata
->arg
.bitmask
= server
->cache_consistency_bitmask
;
1462 calldata
->res
.fattr
= &calldata
->fattr
;
1463 calldata
->res
.seqid
= calldata
->arg
.seqid
;
1464 calldata
->res
.server
= server
;
1465 calldata
->path
.mnt
= mntget(path
->mnt
);
1466 calldata
->path
.dentry
= dget(path
->dentry
);
1468 msg
.rpc_argp
= &calldata
->arg
,
1469 msg
.rpc_resp
= &calldata
->res
,
1470 task_setup_data
.callback_data
= calldata
;
1471 task
= rpc_run_task(&task_setup_data
);
1473 return PTR_ERR(task
);
1476 status
= rpc_wait_for_completion_task(task
);
1482 nfs4_put_open_state(state
);
1483 nfs4_put_state_owner(sp
);
1487 static int nfs4_intent_set_file(struct nameidata
*nd
, struct path
*path
, struct nfs4_state
*state
, fmode_t fmode
)
1492 /* If the open_intent is for execute, we have an extra check to make */
1493 if (fmode
& FMODE_EXEC
) {
1494 ret
= nfs_may_open(state
->inode
,
1495 state
->owner
->so_cred
,
1496 nd
->intent
.open
.flags
);
1500 filp
= lookup_instantiate_filp(nd
, path
->dentry
, NULL
);
1501 if (!IS_ERR(filp
)) {
1502 struct nfs_open_context
*ctx
;
1503 ctx
= nfs_file_open_context(filp
);
1507 ret
= PTR_ERR(filp
);
1509 nfs4_close_sync(path
, state
, fmode
& (FMODE_READ
|FMODE_WRITE
));
1514 nfs4_atomic_open(struct inode
*dir
, struct dentry
*dentry
, struct nameidata
*nd
)
1516 struct path path
= {
1517 .mnt
= nd
->path
.mnt
,
1520 struct dentry
*parent
;
1522 struct rpc_cred
*cred
;
1523 struct nfs4_state
*state
;
1525 fmode_t fmode
= nd
->intent
.open
.flags
& (FMODE_READ
| FMODE_WRITE
| FMODE_EXEC
);
1527 if (nd
->flags
& LOOKUP_CREATE
) {
1528 attr
.ia_mode
= nd
->intent
.open
.create_mode
;
1529 attr
.ia_valid
= ATTR_MODE
;
1530 if (!IS_POSIXACL(dir
))
1531 attr
.ia_mode
&= ~current_umask();
1534 BUG_ON(nd
->intent
.open
.flags
& O_CREAT
);
1537 cred
= rpc_lookup_cred();
1539 return (struct dentry
*)cred
;
1540 parent
= dentry
->d_parent
;
1541 /* Protect against concurrent sillydeletes */
1542 nfs_block_sillyrename(parent
);
1543 state
= nfs4_do_open(dir
, &path
, fmode
, nd
->intent
.open
.flags
, &attr
, cred
);
1545 if (IS_ERR(state
)) {
1546 if (PTR_ERR(state
) == -ENOENT
) {
1547 d_add(dentry
, NULL
);
1548 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
1550 nfs_unblock_sillyrename(parent
);
1551 return (struct dentry
*)state
;
1553 res
= d_add_unique(dentry
, igrab(state
->inode
));
1556 nfs_set_verifier(path
.dentry
, nfs_save_change_attribute(dir
));
1557 nfs_unblock_sillyrename(parent
);
1558 nfs4_intent_set_file(nd
, &path
, state
, fmode
);
1563 nfs4_open_revalidate(struct inode
*dir
, struct dentry
*dentry
, int openflags
, struct nameidata
*nd
)
1565 struct path path
= {
1566 .mnt
= nd
->path
.mnt
,
1569 struct rpc_cred
*cred
;
1570 struct nfs4_state
*state
;
1571 fmode_t fmode
= openflags
& (FMODE_READ
| FMODE_WRITE
);
1573 cred
= rpc_lookup_cred();
1575 return PTR_ERR(cred
);
1576 state
= nfs4_do_open(dir
, &path
, fmode
, openflags
, NULL
, cred
);
1578 if (IS_ERR(state
)) {
1579 switch (PTR_ERR(state
)) {
1585 lookup_instantiate_filp(nd
, (struct dentry
*)state
, NULL
);
1591 if (state
->inode
== dentry
->d_inode
) {
1592 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
1593 nfs4_intent_set_file(nd
, &path
, state
, fmode
);
1596 nfs4_close_sync(&path
, state
, fmode
);
1602 void nfs4_close_context(struct nfs_open_context
*ctx
, int is_sync
)
1604 if (ctx
->state
== NULL
)
1607 nfs4_close_sync(&ctx
->path
, ctx
->state
, ctx
->mode
);
1609 nfs4_close_state(&ctx
->path
, ctx
->state
, ctx
->mode
);
1612 static int _nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1614 struct nfs4_server_caps_arg args
= {
1617 struct nfs4_server_caps_res res
= {};
1618 struct rpc_message msg
= {
1619 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SERVER_CAPS
],
1625 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
1627 memcpy(server
->attr_bitmask
, res
.attr_bitmask
, sizeof(server
->attr_bitmask
));
1628 if (res
.attr_bitmask
[0] & FATTR4_WORD0_ACL
)
1629 server
->caps
|= NFS_CAP_ACLS
;
1630 if (res
.has_links
!= 0)
1631 server
->caps
|= NFS_CAP_HARDLINKS
;
1632 if (res
.has_symlinks
!= 0)
1633 server
->caps
|= NFS_CAP_SYMLINKS
;
1634 memcpy(server
->cache_consistency_bitmask
, res
.attr_bitmask
, sizeof(server
->cache_consistency_bitmask
));
1635 server
->cache_consistency_bitmask
[0] &= FATTR4_WORD0_CHANGE
|FATTR4_WORD0_SIZE
;
1636 server
->cache_consistency_bitmask
[1] &= FATTR4_WORD1_TIME_METADATA
|FATTR4_WORD1_TIME_MODIFY
;
1637 server
->acl_bitmask
= res
.acl_bitmask
;
1643 int nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1645 struct nfs4_exception exception
= { };
1648 err
= nfs4_handle_exception(server
,
1649 _nfs4_server_capabilities(server
, fhandle
),
1651 } while (exception
.retry
);
1655 static int _nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1656 struct nfs_fsinfo
*info
)
1658 struct nfs4_lookup_root_arg args
= {
1659 .bitmask
= nfs4_fattr_bitmap
,
1661 struct nfs4_lookup_res res
= {
1663 .fattr
= info
->fattr
,
1666 struct rpc_message msg
= {
1667 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP_ROOT
],
1671 nfs_fattr_init(info
->fattr
);
1672 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
1675 static int nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1676 struct nfs_fsinfo
*info
)
1678 struct nfs4_exception exception
= { };
1681 err
= nfs4_handle_exception(server
,
1682 _nfs4_lookup_root(server
, fhandle
, info
),
1684 } while (exception
.retry
);
1689 * get the file handle for the "/" directory on the server
1691 static int nfs4_proc_get_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1692 struct nfs_fsinfo
*info
)
1696 status
= nfs4_lookup_root(server
, fhandle
, info
);
1698 status
= nfs4_server_capabilities(server
, fhandle
);
1700 status
= nfs4_do_fsinfo(server
, fhandle
, info
);
1701 return nfs4_map_errors(status
);
1705 * Get locations and (maybe) other attributes of a referral.
1706 * Note that we'll actually follow the referral later when
1707 * we detect fsid mismatch in inode revalidation
1709 static int nfs4_get_referral(struct inode
*dir
, const struct qstr
*name
, struct nfs_fattr
*fattr
, struct nfs_fh
*fhandle
)
1711 int status
= -ENOMEM
;
1712 struct page
*page
= NULL
;
1713 struct nfs4_fs_locations
*locations
= NULL
;
1715 page
= alloc_page(GFP_KERNEL
);
1718 locations
= kmalloc(sizeof(struct nfs4_fs_locations
), GFP_KERNEL
);
1719 if (locations
== NULL
)
1722 status
= nfs4_proc_fs_locations(dir
, name
, locations
, page
);
1725 /* Make sure server returned a different fsid for the referral */
1726 if (nfs_fsid_equal(&NFS_SERVER(dir
)->fsid
, &locations
->fattr
.fsid
)) {
1727 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__
, name
->name
);
1732 memcpy(fattr
, &locations
->fattr
, sizeof(struct nfs_fattr
));
1733 fattr
->valid
|= NFS_ATTR_FATTR_V4_REFERRAL
;
1735 fattr
->mode
= S_IFDIR
;
1736 memset(fhandle
, 0, sizeof(struct nfs_fh
));
1745 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1747 struct nfs4_getattr_arg args
= {
1749 .bitmask
= server
->attr_bitmask
,
1751 struct nfs4_getattr_res res
= {
1755 struct rpc_message msg
= {
1756 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETATTR
],
1761 nfs_fattr_init(fattr
);
1762 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
1765 static int nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1767 struct nfs4_exception exception
= { };
1770 err
= nfs4_handle_exception(server
,
1771 _nfs4_proc_getattr(server
, fhandle
, fattr
),
1773 } while (exception
.retry
);
1778 * The file is not closed if it is opened due to the a request to change
1779 * the size of the file. The open call will not be needed once the
1780 * VFS layer lookup-intents are implemented.
1782 * Close is called when the inode is destroyed.
1783 * If we haven't opened the file for O_WRONLY, we
1784 * need to in the size_change case to obtain a stateid.
1787 * Because OPEN is always done by name in nfsv4, it is
1788 * possible that we opened a different file by the same
1789 * name. We can recognize this race condition, but we
1790 * can't do anything about it besides returning an error.
1792 * This will be fixed with VFS changes (lookup-intent).
1795 nfs4_proc_setattr(struct dentry
*dentry
, struct nfs_fattr
*fattr
,
1796 struct iattr
*sattr
)
1798 struct inode
*inode
= dentry
->d_inode
;
1799 struct rpc_cred
*cred
= NULL
;
1800 struct nfs4_state
*state
= NULL
;
1803 nfs_fattr_init(fattr
);
1805 /* Search for an existing open(O_WRITE) file */
1806 if (sattr
->ia_valid
& ATTR_FILE
) {
1807 struct nfs_open_context
*ctx
;
1809 ctx
= nfs_file_open_context(sattr
->ia_file
);
1816 status
= nfs4_do_setattr(inode
, cred
, fattr
, sattr
, state
);
1818 nfs_setattr_update_inode(inode
, sattr
);
1822 static int _nfs4_proc_lookupfh(struct nfs_server
*server
, const struct nfs_fh
*dirfh
,
1823 const struct qstr
*name
, struct nfs_fh
*fhandle
,
1824 struct nfs_fattr
*fattr
)
1827 struct nfs4_lookup_arg args
= {
1828 .bitmask
= server
->attr_bitmask
,
1832 struct nfs4_lookup_res res
= {
1837 struct rpc_message msg
= {
1838 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP
],
1843 nfs_fattr_init(fattr
);
1845 dprintk("NFS call lookupfh %s\n", name
->name
);
1846 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
1847 dprintk("NFS reply lookupfh: %d\n", status
);
1851 static int nfs4_proc_lookupfh(struct nfs_server
*server
, struct nfs_fh
*dirfh
,
1852 struct qstr
*name
, struct nfs_fh
*fhandle
,
1853 struct nfs_fattr
*fattr
)
1855 struct nfs4_exception exception
= { };
1858 err
= _nfs4_proc_lookupfh(server
, dirfh
, name
, fhandle
, fattr
);
1860 if (err
== -NFS4ERR_MOVED
) {
1864 err
= nfs4_handle_exception(server
, err
, &exception
);
1865 } while (exception
.retry
);
1869 static int _nfs4_proc_lookup(struct inode
*dir
, const struct qstr
*name
,
1870 struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1874 dprintk("NFS call lookup %s\n", name
->name
);
1875 status
= _nfs4_proc_lookupfh(NFS_SERVER(dir
), NFS_FH(dir
), name
, fhandle
, fattr
);
1876 if (status
== -NFS4ERR_MOVED
)
1877 status
= nfs4_get_referral(dir
, name
, fattr
, fhandle
);
1878 dprintk("NFS reply lookup: %d\n", status
);
1882 static int nfs4_proc_lookup(struct inode
*dir
, struct qstr
*name
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1884 struct nfs4_exception exception
= { };
1887 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1888 _nfs4_proc_lookup(dir
, name
, fhandle
, fattr
),
1890 } while (exception
.retry
);
1894 static int _nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
1896 struct nfs_server
*server
= NFS_SERVER(inode
);
1897 struct nfs_fattr fattr
;
1898 struct nfs4_accessargs args
= {
1899 .fh
= NFS_FH(inode
),
1900 .bitmask
= server
->attr_bitmask
,
1902 struct nfs4_accessres res
= {
1906 struct rpc_message msg
= {
1907 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_ACCESS
],
1910 .rpc_cred
= entry
->cred
,
1912 int mode
= entry
->mask
;
1916 * Determine which access bits we want to ask for...
1918 if (mode
& MAY_READ
)
1919 args
.access
|= NFS4_ACCESS_READ
;
1920 if (S_ISDIR(inode
->i_mode
)) {
1921 if (mode
& MAY_WRITE
)
1922 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
;
1923 if (mode
& MAY_EXEC
)
1924 args
.access
|= NFS4_ACCESS_LOOKUP
;
1926 if (mode
& MAY_WRITE
)
1927 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
;
1928 if (mode
& MAY_EXEC
)
1929 args
.access
|= NFS4_ACCESS_EXECUTE
;
1931 nfs_fattr_init(&fattr
);
1932 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
1935 if (res
.access
& NFS4_ACCESS_READ
)
1936 entry
->mask
|= MAY_READ
;
1937 if (res
.access
& (NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
))
1938 entry
->mask
|= MAY_WRITE
;
1939 if (res
.access
& (NFS4_ACCESS_LOOKUP
|NFS4_ACCESS_EXECUTE
))
1940 entry
->mask
|= MAY_EXEC
;
1941 nfs_refresh_inode(inode
, &fattr
);
1946 static int nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
1948 struct nfs4_exception exception
= { };
1951 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1952 _nfs4_proc_access(inode
, entry
),
1954 } while (exception
.retry
);
1959 * TODO: For the time being, we don't try to get any attributes
1960 * along with any of the zero-copy operations READ, READDIR,
1963 * In the case of the first three, we want to put the GETATTR
1964 * after the read-type operation -- this is because it is hard
1965 * to predict the length of a GETATTR response in v4, and thus
1966 * align the READ data correctly. This means that the GETATTR
1967 * may end up partially falling into the page cache, and we should
1968 * shift it into the 'tail' of the xdr_buf before processing.
1969 * To do this efficiently, we need to know the total length
1970 * of data received, which doesn't seem to be available outside
1973 * In the case of WRITE, we also want to put the GETATTR after
1974 * the operation -- in this case because we want to make sure
1975 * we get the post-operation mtime and size. This means that
1976 * we can't use xdr_encode_pages() as written: we need a variant
1977 * of it which would leave room in the 'tail' iovec.
1979 * Both of these changes to the XDR layer would in fact be quite
1980 * minor, but I decided to leave them for a subsequent patch.
1982 static int _nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
1983 unsigned int pgbase
, unsigned int pglen
)
1985 struct nfs4_readlink args
= {
1986 .fh
= NFS_FH(inode
),
1991 struct nfs4_readlink_res res
;
1992 struct rpc_message msg
= {
1993 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READLINK
],
1998 return nfs4_call_sync(NFS_SERVER(inode
), &msg
, &args
, &res
, 0);
2001 static int nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
2002 unsigned int pgbase
, unsigned int pglen
)
2004 struct nfs4_exception exception
= { };
2007 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2008 _nfs4_proc_readlink(inode
, page
, pgbase
, pglen
),
2010 } while (exception
.retry
);
2016 * We will need to arrange for the VFS layer to provide an atomic open.
2017 * Until then, this create/open method is prone to inefficiency and race
2018 * conditions due to the lookup, create, and open VFS calls from sys_open()
2019 * placed on the wire.
2021 * Given the above sorry state of affairs, I'm simply sending an OPEN.
2022 * The file will be opened again in the subsequent VFS open call
2023 * (nfs4_proc_file_open).
2025 * The open for read will just hang around to be used by any process that
2026 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
2030 nfs4_proc_create(struct inode
*dir
, struct dentry
*dentry
, struct iattr
*sattr
,
2031 int flags
, struct nameidata
*nd
)
2033 struct path path
= {
2034 .mnt
= nd
->path
.mnt
,
2037 struct nfs4_state
*state
;
2038 struct rpc_cred
*cred
;
2039 fmode_t fmode
= flags
& (FMODE_READ
| FMODE_WRITE
);
2042 cred
= rpc_lookup_cred();
2044 status
= PTR_ERR(cred
);
2047 state
= nfs4_do_open(dir
, &path
, fmode
, flags
, sattr
, cred
);
2049 if (IS_ERR(state
)) {
2050 status
= PTR_ERR(state
);
2053 d_add(dentry
, igrab(state
->inode
));
2054 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
2055 if (flags
& O_EXCL
) {
2056 struct nfs_fattr fattr
;
2057 status
= nfs4_do_setattr(state
->inode
, cred
, &fattr
, sattr
, state
);
2059 nfs_setattr_update_inode(state
->inode
, sattr
);
2060 nfs_post_op_update_inode(state
->inode
, &fattr
);
2062 if (status
== 0 && (nd
->flags
& LOOKUP_OPEN
) != 0)
2063 status
= nfs4_intent_set_file(nd
, &path
, state
, fmode
);
2065 nfs4_close_sync(&path
, state
, fmode
);
2072 static int _nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
2074 struct nfs_server
*server
= NFS_SERVER(dir
);
2075 struct nfs_removeargs args
= {
2077 .name
.len
= name
->len
,
2078 .name
.name
= name
->name
,
2079 .bitmask
= server
->attr_bitmask
,
2081 struct nfs_removeres res
= {
2084 struct rpc_message msg
= {
2085 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
],
2091 nfs_fattr_init(&res
.dir_attr
);
2092 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 1);
2094 update_changeattr(dir
, &res
.cinfo
);
2095 nfs_post_op_update_inode(dir
, &res
.dir_attr
);
2100 static int nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
2102 struct nfs4_exception exception
= { };
2105 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2106 _nfs4_proc_remove(dir
, name
),
2108 } while (exception
.retry
);
2112 static void nfs4_proc_unlink_setup(struct rpc_message
*msg
, struct inode
*dir
)
2114 struct nfs_server
*server
= NFS_SERVER(dir
);
2115 struct nfs_removeargs
*args
= msg
->rpc_argp
;
2116 struct nfs_removeres
*res
= msg
->rpc_resp
;
2118 args
->bitmask
= server
->cache_consistency_bitmask
;
2119 res
->server
= server
;
2120 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
];
2123 static int nfs4_proc_unlink_done(struct rpc_task
*task
, struct inode
*dir
)
2125 struct nfs_removeres
*res
= task
->tk_msg
.rpc_resp
;
2127 if (nfs4_async_handle_error(task
, res
->server
, NULL
) == -EAGAIN
)
2129 update_changeattr(dir
, &res
->cinfo
);
2130 nfs_post_op_update_inode(dir
, &res
->dir_attr
);
2134 static int _nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2135 struct inode
*new_dir
, struct qstr
*new_name
)
2137 struct nfs_server
*server
= NFS_SERVER(old_dir
);
2138 struct nfs4_rename_arg arg
= {
2139 .old_dir
= NFS_FH(old_dir
),
2140 .new_dir
= NFS_FH(new_dir
),
2141 .old_name
= old_name
,
2142 .new_name
= new_name
,
2143 .bitmask
= server
->attr_bitmask
,
2145 struct nfs_fattr old_fattr
, new_fattr
;
2146 struct nfs4_rename_res res
= {
2148 .old_fattr
= &old_fattr
,
2149 .new_fattr
= &new_fattr
,
2151 struct rpc_message msg
= {
2152 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENAME
],
2158 nfs_fattr_init(res
.old_fattr
);
2159 nfs_fattr_init(res
.new_fattr
);
2160 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
2163 update_changeattr(old_dir
, &res
.old_cinfo
);
2164 nfs_post_op_update_inode(old_dir
, res
.old_fattr
);
2165 update_changeattr(new_dir
, &res
.new_cinfo
);
2166 nfs_post_op_update_inode(new_dir
, res
.new_fattr
);
2171 static int nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2172 struct inode
*new_dir
, struct qstr
*new_name
)
2174 struct nfs4_exception exception
= { };
2177 err
= nfs4_handle_exception(NFS_SERVER(old_dir
),
2178 _nfs4_proc_rename(old_dir
, old_name
,
2181 } while (exception
.retry
);
2185 static int _nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2187 struct nfs_server
*server
= NFS_SERVER(inode
);
2188 struct nfs4_link_arg arg
= {
2189 .fh
= NFS_FH(inode
),
2190 .dir_fh
= NFS_FH(dir
),
2192 .bitmask
= server
->attr_bitmask
,
2194 struct nfs_fattr fattr
, dir_attr
;
2195 struct nfs4_link_res res
= {
2198 .dir_attr
= &dir_attr
,
2200 struct rpc_message msg
= {
2201 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LINK
],
2207 nfs_fattr_init(res
.fattr
);
2208 nfs_fattr_init(res
.dir_attr
);
2209 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
2211 update_changeattr(dir
, &res
.cinfo
);
2212 nfs_post_op_update_inode(dir
, res
.dir_attr
);
2213 nfs_post_op_update_inode(inode
, res
.fattr
);
2219 static int nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2221 struct nfs4_exception exception
= { };
2224 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2225 _nfs4_proc_link(inode
, dir
, name
),
2227 } while (exception
.retry
);
2231 struct nfs4_createdata
{
2232 struct rpc_message msg
;
2233 struct nfs4_create_arg arg
;
2234 struct nfs4_create_res res
;
2236 struct nfs_fattr fattr
;
2237 struct nfs_fattr dir_fattr
;
2240 static struct nfs4_createdata
*nfs4_alloc_createdata(struct inode
*dir
,
2241 struct qstr
*name
, struct iattr
*sattr
, u32 ftype
)
2243 struct nfs4_createdata
*data
;
2245 data
= kzalloc(sizeof(*data
), GFP_KERNEL
);
2247 struct nfs_server
*server
= NFS_SERVER(dir
);
2249 data
->msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
];
2250 data
->msg
.rpc_argp
= &data
->arg
;
2251 data
->msg
.rpc_resp
= &data
->res
;
2252 data
->arg
.dir_fh
= NFS_FH(dir
);
2253 data
->arg
.server
= server
;
2254 data
->arg
.name
= name
;
2255 data
->arg
.attrs
= sattr
;
2256 data
->arg
.ftype
= ftype
;
2257 data
->arg
.bitmask
= server
->attr_bitmask
;
2258 data
->res
.server
= server
;
2259 data
->res
.fh
= &data
->fh
;
2260 data
->res
.fattr
= &data
->fattr
;
2261 data
->res
.dir_fattr
= &data
->dir_fattr
;
2262 nfs_fattr_init(data
->res
.fattr
);
2263 nfs_fattr_init(data
->res
.dir_fattr
);
2268 static int nfs4_do_create(struct inode
*dir
, struct dentry
*dentry
, struct nfs4_createdata
*data
)
2270 int status
= nfs4_call_sync(NFS_SERVER(dir
), &data
->msg
,
2271 &data
->arg
, &data
->res
, 1);
2273 update_changeattr(dir
, &data
->res
.dir_cinfo
);
2274 nfs_post_op_update_inode(dir
, data
->res
.dir_fattr
);
2275 status
= nfs_instantiate(dentry
, data
->res
.fh
, data
->res
.fattr
);
2280 static void nfs4_free_createdata(struct nfs4_createdata
*data
)
2285 static int _nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2286 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2288 struct nfs4_createdata
*data
;
2289 int status
= -ENAMETOOLONG
;
2291 if (len
> NFS4_MAXPATHLEN
)
2295 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4LNK
);
2299 data
->msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SYMLINK
];
2300 data
->arg
.u
.symlink
.pages
= &page
;
2301 data
->arg
.u
.symlink
.len
= len
;
2303 status
= nfs4_do_create(dir
, dentry
, data
);
2305 nfs4_free_createdata(data
);
2310 static int nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2311 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2313 struct nfs4_exception exception
= { };
2316 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2317 _nfs4_proc_symlink(dir
, dentry
, page
,
2320 } while (exception
.retry
);
2324 static int _nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2325 struct iattr
*sattr
)
2327 struct nfs4_createdata
*data
;
2328 int status
= -ENOMEM
;
2330 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4DIR
);
2334 status
= nfs4_do_create(dir
, dentry
, data
);
2336 nfs4_free_createdata(data
);
2341 static int nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2342 struct iattr
*sattr
)
2344 struct nfs4_exception exception
= { };
2347 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2348 _nfs4_proc_mkdir(dir
, dentry
, sattr
),
2350 } while (exception
.retry
);
2354 static int _nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2355 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2357 struct inode
*dir
= dentry
->d_inode
;
2358 struct nfs4_readdir_arg args
= {
2363 .bitmask
= NFS_SERVER(dentry
->d_inode
)->cache_consistency_bitmask
,
2365 struct nfs4_readdir_res res
;
2366 struct rpc_message msg
= {
2367 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READDIR
],
2374 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__
,
2375 dentry
->d_parent
->d_name
.name
,
2376 dentry
->d_name
.name
,
2377 (unsigned long long)cookie
);
2378 nfs4_setup_readdir(cookie
, NFS_COOKIEVERF(dir
), dentry
, &args
);
2379 res
.pgbase
= args
.pgbase
;
2380 status
= nfs4_call_sync(NFS_SERVER(dir
), &msg
, &args
, &res
, 0);
2382 memcpy(NFS_COOKIEVERF(dir
), res
.verifier
.data
, NFS4_VERIFIER_SIZE
);
2384 nfs_invalidate_atime(dir
);
2386 dprintk("%s: returns %d\n", __func__
, status
);
2390 static int nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2391 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2393 struct nfs4_exception exception
= { };
2396 err
= nfs4_handle_exception(NFS_SERVER(dentry
->d_inode
),
2397 _nfs4_proc_readdir(dentry
, cred
, cookie
,
2400 } while (exception
.retry
);
2404 static int _nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2405 struct iattr
*sattr
, dev_t rdev
)
2407 struct nfs4_createdata
*data
;
2408 int mode
= sattr
->ia_mode
;
2409 int status
= -ENOMEM
;
2411 BUG_ON(!(sattr
->ia_valid
& ATTR_MODE
));
2412 BUG_ON(!S_ISFIFO(mode
) && !S_ISBLK(mode
) && !S_ISCHR(mode
) && !S_ISSOCK(mode
));
2414 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4SOCK
);
2419 data
->arg
.ftype
= NF4FIFO
;
2420 else if (S_ISBLK(mode
)) {
2421 data
->arg
.ftype
= NF4BLK
;
2422 data
->arg
.u
.device
.specdata1
= MAJOR(rdev
);
2423 data
->arg
.u
.device
.specdata2
= MINOR(rdev
);
2425 else if (S_ISCHR(mode
)) {
2426 data
->arg
.ftype
= NF4CHR
;
2427 data
->arg
.u
.device
.specdata1
= MAJOR(rdev
);
2428 data
->arg
.u
.device
.specdata2
= MINOR(rdev
);
2431 status
= nfs4_do_create(dir
, dentry
, data
);
2433 nfs4_free_createdata(data
);
2438 static int nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2439 struct iattr
*sattr
, dev_t rdev
)
2441 struct nfs4_exception exception
= { };
2444 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2445 _nfs4_proc_mknod(dir
, dentry
, sattr
, rdev
),
2447 } while (exception
.retry
);
2451 static int _nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2452 struct nfs_fsstat
*fsstat
)
2454 struct nfs4_statfs_arg args
= {
2456 .bitmask
= server
->attr_bitmask
,
2458 struct nfs4_statfs_res res
= {
2461 struct rpc_message msg
= {
2462 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_STATFS
],
2467 nfs_fattr_init(fsstat
->fattr
);
2468 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2471 static int nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsstat
*fsstat
)
2473 struct nfs4_exception exception
= { };
2476 err
= nfs4_handle_exception(server
,
2477 _nfs4_proc_statfs(server
, fhandle
, fsstat
),
2479 } while (exception
.retry
);
2483 static int _nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2484 struct nfs_fsinfo
*fsinfo
)
2486 struct nfs4_fsinfo_arg args
= {
2488 .bitmask
= server
->attr_bitmask
,
2490 struct nfs4_fsinfo_res res
= {
2493 struct rpc_message msg
= {
2494 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FSINFO
],
2499 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2502 static int nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2504 struct nfs4_exception exception
= { };
2508 err
= nfs4_handle_exception(server
,
2509 _nfs4_do_fsinfo(server
, fhandle
, fsinfo
),
2511 } while (exception
.retry
);
2515 static int nfs4_proc_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2517 nfs_fattr_init(fsinfo
->fattr
);
2518 return nfs4_do_fsinfo(server
, fhandle
, fsinfo
);
2521 static int _nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2522 struct nfs_pathconf
*pathconf
)
2524 struct nfs4_pathconf_arg args
= {
2526 .bitmask
= server
->attr_bitmask
,
2528 struct nfs4_pathconf_res res
= {
2529 .pathconf
= pathconf
,
2531 struct rpc_message msg
= {
2532 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_PATHCONF
],
2537 /* None of the pathconf attributes are mandatory to implement */
2538 if ((args
.bitmask
[0] & nfs4_pathconf_bitmap
[0]) == 0) {
2539 memset(pathconf
, 0, sizeof(*pathconf
));
2543 nfs_fattr_init(pathconf
->fattr
);
2544 return nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
2547 static int nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2548 struct nfs_pathconf
*pathconf
)
2550 struct nfs4_exception exception
= { };
2554 err
= nfs4_handle_exception(server
,
2555 _nfs4_proc_pathconf(server
, fhandle
, pathconf
),
2557 } while (exception
.retry
);
2561 static int nfs4_read_done(struct rpc_task
*task
, struct nfs_read_data
*data
)
2563 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2565 if (nfs4_async_handle_error(task
, server
, data
->args
.context
->state
) == -EAGAIN
) {
2566 rpc_restart_call(task
);
2570 nfs_invalidate_atime(data
->inode
);
2571 if (task
->tk_status
> 0)
2572 renew_lease(server
, data
->timestamp
);
2576 static void nfs4_proc_read_setup(struct nfs_read_data
*data
, struct rpc_message
*msg
)
2578 data
->timestamp
= jiffies
;
2579 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READ
];
2582 static int nfs4_write_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
2584 struct inode
*inode
= data
->inode
;
2586 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
), data
->args
.context
->state
) == -EAGAIN
) {
2587 rpc_restart_call(task
);
2590 if (task
->tk_status
>= 0) {
2591 renew_lease(NFS_SERVER(inode
), data
->timestamp
);
2592 nfs_post_op_update_inode_force_wcc(inode
, data
->res
.fattr
);
2597 static void nfs4_proc_write_setup(struct nfs_write_data
*data
, struct rpc_message
*msg
)
2599 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2601 data
->args
.bitmask
= server
->cache_consistency_bitmask
;
2602 data
->res
.server
= server
;
2603 data
->timestamp
= jiffies
;
2605 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_WRITE
];
2608 static int nfs4_commit_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
2610 struct inode
*inode
= data
->inode
;
2612 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
), NULL
) == -EAGAIN
) {
2613 rpc_restart_call(task
);
2616 nfs_refresh_inode(inode
, data
->res
.fattr
);
2620 static void nfs4_proc_commit_setup(struct nfs_write_data
*data
, struct rpc_message
*msg
)
2622 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2624 data
->args
.bitmask
= server
->cache_consistency_bitmask
;
2625 data
->res
.server
= server
;
2626 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_COMMIT
];
2630 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2631 * standalone procedure for queueing an asynchronous RENEW.
2633 static void nfs4_renew_done(struct rpc_task
*task
, void *data
)
2635 struct nfs_client
*clp
= (struct nfs_client
*)task
->tk_msg
.rpc_argp
;
2636 unsigned long timestamp
= (unsigned long)data
;
2638 if (task
->tk_status
< 0) {
2639 /* Unless we're shutting down, schedule state recovery! */
2640 if (test_bit(NFS_CS_RENEWD
, &clp
->cl_res_state
) != 0)
2641 nfs4_schedule_state_recovery(clp
);
2644 spin_lock(&clp
->cl_lock
);
2645 if (time_before(clp
->cl_last_renewal
,timestamp
))
2646 clp
->cl_last_renewal
= timestamp
;
2647 spin_unlock(&clp
->cl_lock
);
2650 static const struct rpc_call_ops nfs4_renew_ops
= {
2651 .rpc_call_done
= nfs4_renew_done
,
2654 int nfs4_proc_async_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2656 struct rpc_message msg
= {
2657 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2662 return rpc_call_async(clp
->cl_rpcclient
, &msg
, RPC_TASK_SOFT
,
2663 &nfs4_renew_ops
, (void *)jiffies
);
2666 int nfs4_proc_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2668 struct rpc_message msg
= {
2669 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2673 unsigned long now
= jiffies
;
2676 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2679 spin_lock(&clp
->cl_lock
);
2680 if (time_before(clp
->cl_last_renewal
,now
))
2681 clp
->cl_last_renewal
= now
;
2682 spin_unlock(&clp
->cl_lock
);
2686 static inline int nfs4_server_supports_acls(struct nfs_server
*server
)
2688 return (server
->caps
& NFS_CAP_ACLS
)
2689 && (server
->acl_bitmask
& ACL4_SUPPORT_ALLOW_ACL
)
2690 && (server
->acl_bitmask
& ACL4_SUPPORT_DENY_ACL
);
2693 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2694 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2697 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2699 static void buf_to_pages(const void *buf
, size_t buflen
,
2700 struct page
**pages
, unsigned int *pgbase
)
2702 const void *p
= buf
;
2704 *pgbase
= offset_in_page(buf
);
2706 while (p
< buf
+ buflen
) {
2707 *(pages
++) = virt_to_page(p
);
2708 p
+= PAGE_CACHE_SIZE
;
2712 struct nfs4_cached_acl
{
2718 static void nfs4_set_cached_acl(struct inode
*inode
, struct nfs4_cached_acl
*acl
)
2720 struct nfs_inode
*nfsi
= NFS_I(inode
);
2722 spin_lock(&inode
->i_lock
);
2723 kfree(nfsi
->nfs4_acl
);
2724 nfsi
->nfs4_acl
= acl
;
2725 spin_unlock(&inode
->i_lock
);
2728 static void nfs4_zap_acl_attr(struct inode
*inode
)
2730 nfs4_set_cached_acl(inode
, NULL
);
2733 static inline ssize_t
nfs4_read_cached_acl(struct inode
*inode
, char *buf
, size_t buflen
)
2735 struct nfs_inode
*nfsi
= NFS_I(inode
);
2736 struct nfs4_cached_acl
*acl
;
2739 spin_lock(&inode
->i_lock
);
2740 acl
= nfsi
->nfs4_acl
;
2743 if (buf
== NULL
) /* user is just asking for length */
2745 if (acl
->cached
== 0)
2747 ret
= -ERANGE
; /* see getxattr(2) man page */
2748 if (acl
->len
> buflen
)
2750 memcpy(buf
, acl
->data
, acl
->len
);
2754 spin_unlock(&inode
->i_lock
);
2758 static void nfs4_write_cached_acl(struct inode
*inode
, const char *buf
, size_t acl_len
)
2760 struct nfs4_cached_acl
*acl
;
2762 if (buf
&& acl_len
<= PAGE_SIZE
) {
2763 acl
= kmalloc(sizeof(*acl
) + acl_len
, GFP_KERNEL
);
2767 memcpy(acl
->data
, buf
, acl_len
);
2769 acl
= kmalloc(sizeof(*acl
), GFP_KERNEL
);
2776 nfs4_set_cached_acl(inode
, acl
);
2779 static ssize_t
__nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
2781 struct page
*pages
[NFS4ACL_MAXPAGES
];
2782 struct nfs_getaclargs args
= {
2783 .fh
= NFS_FH(inode
),
2787 struct nfs_getaclres res
= {
2791 struct rpc_message msg
= {
2792 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETACL
],
2796 struct page
*localpage
= NULL
;
2799 if (buflen
< PAGE_SIZE
) {
2800 /* As long as we're doing a round trip to the server anyway,
2801 * let's be prepared for a page of acl data. */
2802 localpage
= alloc_page(GFP_KERNEL
);
2803 resp_buf
= page_address(localpage
);
2804 if (localpage
== NULL
)
2806 args
.acl_pages
[0] = localpage
;
2807 args
.acl_pgbase
= 0;
2808 args
.acl_len
= PAGE_SIZE
;
2811 buf_to_pages(buf
, buflen
, args
.acl_pages
, &args
.acl_pgbase
);
2813 ret
= nfs4_call_sync(NFS_SERVER(inode
), &msg
, &args
, &res
, 0);
2816 if (res
.acl_len
> args
.acl_len
)
2817 nfs4_write_cached_acl(inode
, NULL
, res
.acl_len
);
2819 nfs4_write_cached_acl(inode
, resp_buf
, res
.acl_len
);
2822 if (res
.acl_len
> buflen
)
2825 memcpy(buf
, resp_buf
, res
.acl_len
);
2830 __free_page(localpage
);
2834 static ssize_t
nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
2836 struct nfs4_exception exception
= { };
2839 ret
= __nfs4_get_acl_uncached(inode
, buf
, buflen
);
2842 ret
= nfs4_handle_exception(NFS_SERVER(inode
), ret
, &exception
);
2843 } while (exception
.retry
);
2847 static ssize_t
nfs4_proc_get_acl(struct inode
*inode
, void *buf
, size_t buflen
)
2849 struct nfs_server
*server
= NFS_SERVER(inode
);
2852 if (!nfs4_server_supports_acls(server
))
2854 ret
= nfs_revalidate_inode(server
, inode
);
2857 if (NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ACL
)
2858 nfs_zap_acl_cache(inode
);
2859 ret
= nfs4_read_cached_acl(inode
, buf
, buflen
);
2862 return nfs4_get_acl_uncached(inode
, buf
, buflen
);
2865 static int __nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
2867 struct nfs_server
*server
= NFS_SERVER(inode
);
2868 struct page
*pages
[NFS4ACL_MAXPAGES
];
2869 struct nfs_setaclargs arg
= {
2870 .fh
= NFS_FH(inode
),
2874 struct nfs_setaclres res
;
2875 struct rpc_message msg
= {
2876 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETACL
],
2882 if (!nfs4_server_supports_acls(server
))
2884 nfs_inode_return_delegation(inode
);
2885 buf_to_pages(buf
, buflen
, arg
.acl_pages
, &arg
.acl_pgbase
);
2886 ret
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
2887 nfs_access_zap_cache(inode
);
2888 nfs_zap_acl_cache(inode
);
2892 static int nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
2894 struct nfs4_exception exception
= { };
2897 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2898 __nfs4_proc_set_acl(inode
, buf
, buflen
),
2900 } while (exception
.retry
);
2905 nfs4_async_handle_error(struct rpc_task
*task
, const struct nfs_server
*server
, struct nfs4_state
*state
)
2907 struct nfs_client
*clp
= server
->nfs_client
;
2909 if (!clp
|| task
->tk_status
>= 0)
2911 switch(task
->tk_status
) {
2912 case -NFS4ERR_ADMIN_REVOKED
:
2913 case -NFS4ERR_BAD_STATEID
:
2914 case -NFS4ERR_OPENMODE
:
2917 nfs4_state_mark_reclaim_nograce(clp
, state
);
2918 case -NFS4ERR_STALE_CLIENTID
:
2919 case -NFS4ERR_STALE_STATEID
:
2920 case -NFS4ERR_EXPIRED
:
2921 rpc_sleep_on(&clp
->cl_rpcwaitq
, task
, NULL
);
2922 nfs4_schedule_state_recovery(clp
);
2923 if (test_bit(NFS4CLNT_MANAGER_RUNNING
, &clp
->cl_state
) == 0)
2924 rpc_wake_up_queued_task(&clp
->cl_rpcwaitq
, task
);
2925 task
->tk_status
= 0;
2927 case -NFS4ERR_DELAY
:
2928 nfs_inc_server_stats(server
, NFSIOS_DELAY
);
2929 case -NFS4ERR_GRACE
:
2930 rpc_delay(task
, NFS4_POLL_RETRY_MAX
);
2931 task
->tk_status
= 0;
2933 case -NFS4ERR_OLD_STATEID
:
2934 task
->tk_status
= 0;
2937 task
->tk_status
= nfs4_map_errors(task
->tk_status
);
2941 int nfs4_proc_setclientid(struct nfs_client
*clp
, u32 program
, unsigned short port
, struct rpc_cred
*cred
)
2943 nfs4_verifier sc_verifier
;
2944 struct nfs4_setclientid setclientid
= {
2945 .sc_verifier
= &sc_verifier
,
2948 struct rpc_message msg
= {
2949 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID
],
2950 .rpc_argp
= &setclientid
,
2958 p
= (__be32
*)sc_verifier
.data
;
2959 *p
++ = htonl((u32
)clp
->cl_boot_time
.tv_sec
);
2960 *p
= htonl((u32
)clp
->cl_boot_time
.tv_nsec
);
2963 setclientid
.sc_name_len
= scnprintf(setclientid
.sc_name
,
2964 sizeof(setclientid
.sc_name
), "%s/%s %s %s %u",
2966 rpc_peeraddr2str(clp
->cl_rpcclient
,
2968 rpc_peeraddr2str(clp
->cl_rpcclient
,
2970 clp
->cl_rpcclient
->cl_auth
->au_ops
->au_name
,
2971 clp
->cl_id_uniquifier
);
2972 setclientid
.sc_netid_len
= scnprintf(setclientid
.sc_netid
,
2973 sizeof(setclientid
.sc_netid
),
2974 rpc_peeraddr2str(clp
->cl_rpcclient
,
2975 RPC_DISPLAY_NETID
));
2976 setclientid
.sc_uaddr_len
= scnprintf(setclientid
.sc_uaddr
,
2977 sizeof(setclientid
.sc_uaddr
), "%s.%u.%u",
2978 clp
->cl_ipaddr
, port
>> 8, port
& 255);
2980 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2981 if (status
!= -NFS4ERR_CLID_INUSE
)
2986 ssleep(clp
->cl_lease_time
+ 1);
2988 if (++clp
->cl_id_uniquifier
== 0)
2994 static int _nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2996 struct nfs_fsinfo fsinfo
;
2997 struct rpc_message msg
= {
2998 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID_CONFIRM
],
3000 .rpc_resp
= &fsinfo
,
3007 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
3009 spin_lock(&clp
->cl_lock
);
3010 clp
->cl_lease_time
= fsinfo
.lease_time
* HZ
;
3011 clp
->cl_last_renewal
= now
;
3012 spin_unlock(&clp
->cl_lock
);
3017 int nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
3022 err
= _nfs4_proc_setclientid_confirm(clp
, cred
);
3026 case -NFS4ERR_RESOURCE
:
3027 /* The IBM lawyers misread another document! */
3028 case -NFS4ERR_DELAY
:
3029 err
= nfs4_delay(clp
->cl_rpcclient
, &timeout
);
3035 struct nfs4_delegreturndata
{
3036 struct nfs4_delegreturnargs args
;
3037 struct nfs4_delegreturnres res
;
3039 nfs4_stateid stateid
;
3040 unsigned long timestamp
;
3041 struct nfs_fattr fattr
;
3045 static void nfs4_delegreturn_done(struct rpc_task
*task
, void *calldata
)
3047 struct nfs4_delegreturndata
*data
= calldata
;
3048 data
->rpc_status
= task
->tk_status
;
3049 if (data
->rpc_status
== 0)
3050 renew_lease(data
->res
.server
, data
->timestamp
);
3053 static void nfs4_delegreturn_release(void *calldata
)
3058 static const struct rpc_call_ops nfs4_delegreturn_ops
= {
3059 .rpc_call_done
= nfs4_delegreturn_done
,
3060 .rpc_release
= nfs4_delegreturn_release
,
3063 static int _nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
, int issync
)
3065 struct nfs4_delegreturndata
*data
;
3066 struct nfs_server
*server
= NFS_SERVER(inode
);
3067 struct rpc_task
*task
;
3068 struct rpc_message msg
= {
3069 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DELEGRETURN
],
3072 struct rpc_task_setup task_setup_data
= {
3073 .rpc_client
= server
->client
,
3074 .rpc_message
= &msg
,
3075 .callback_ops
= &nfs4_delegreturn_ops
,
3076 .flags
= RPC_TASK_ASYNC
,
3080 data
= kmalloc(sizeof(*data
), GFP_KERNEL
);
3083 data
->args
.fhandle
= &data
->fh
;
3084 data
->args
.stateid
= &data
->stateid
;
3085 data
->args
.bitmask
= server
->attr_bitmask
;
3086 nfs_copy_fh(&data
->fh
, NFS_FH(inode
));
3087 memcpy(&data
->stateid
, stateid
, sizeof(data
->stateid
));
3088 data
->res
.fattr
= &data
->fattr
;
3089 data
->res
.server
= server
;
3090 nfs_fattr_init(data
->res
.fattr
);
3091 data
->timestamp
= jiffies
;
3092 data
->rpc_status
= 0;
3094 task_setup_data
.callback_data
= data
;
3095 msg
.rpc_argp
= &data
->args
,
3096 msg
.rpc_resp
= &data
->res
,
3097 task
= rpc_run_task(&task_setup_data
);
3099 return PTR_ERR(task
);
3102 status
= nfs4_wait_for_completion_rpc_task(task
);
3105 status
= data
->rpc_status
;
3108 nfs_refresh_inode(inode
, &data
->fattr
);
3114 int nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
, int issync
)
3116 struct nfs_server
*server
= NFS_SERVER(inode
);
3117 struct nfs4_exception exception
= { };
3120 err
= _nfs4_proc_delegreturn(inode
, cred
, stateid
, issync
);
3122 case -NFS4ERR_STALE_STATEID
:
3123 case -NFS4ERR_EXPIRED
:
3127 err
= nfs4_handle_exception(server
, err
, &exception
);
3128 } while (exception
.retry
);
3132 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3133 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3136 * sleep, with exponential backoff, and retry the LOCK operation.
3138 static unsigned long
3139 nfs4_set_lock_task_retry(unsigned long timeout
)
3141 schedule_timeout_killable(timeout
);
3143 if (timeout
> NFS4_LOCK_MAXTIMEOUT
)
3144 return NFS4_LOCK_MAXTIMEOUT
;
3148 static int _nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3150 struct inode
*inode
= state
->inode
;
3151 struct nfs_server
*server
= NFS_SERVER(inode
);
3152 struct nfs_client
*clp
= server
->nfs_client
;
3153 struct nfs_lockt_args arg
= {
3154 .fh
= NFS_FH(inode
),
3157 struct nfs_lockt_res res
= {
3160 struct rpc_message msg
= {
3161 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKT
],
3164 .rpc_cred
= state
->owner
->so_cred
,
3166 struct nfs4_lock_state
*lsp
;
3169 arg
.lock_owner
.clientid
= clp
->cl_clientid
;
3170 status
= nfs4_set_lock_state(state
, request
);
3173 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3174 arg
.lock_owner
.id
= lsp
->ls_id
.id
;
3175 status
= nfs4_call_sync(server
, &msg
, &arg
, &res
, 1);
3178 request
->fl_type
= F_UNLCK
;
3180 case -NFS4ERR_DENIED
:
3183 request
->fl_ops
->fl_release_private(request
);
3188 static int nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3190 struct nfs4_exception exception
= { };
3194 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3195 _nfs4_proc_getlk(state
, cmd
, request
),
3197 } while (exception
.retry
);
3201 static int do_vfs_lock(struct file
*file
, struct file_lock
*fl
)
3204 switch (fl
->fl_flags
& (FL_POSIX
|FL_FLOCK
)) {
3206 res
= posix_lock_file_wait(file
, fl
);
3209 res
= flock_lock_file_wait(file
, fl
);
3217 struct nfs4_unlockdata
{
3218 struct nfs_locku_args arg
;
3219 struct nfs_locku_res res
;
3220 struct nfs4_lock_state
*lsp
;
3221 struct nfs_open_context
*ctx
;
3222 struct file_lock fl
;
3223 const struct nfs_server
*server
;
3224 unsigned long timestamp
;
3227 static struct nfs4_unlockdata
*nfs4_alloc_unlockdata(struct file_lock
*fl
,
3228 struct nfs_open_context
*ctx
,
3229 struct nfs4_lock_state
*lsp
,
3230 struct nfs_seqid
*seqid
)
3232 struct nfs4_unlockdata
*p
;
3233 struct inode
*inode
= lsp
->ls_state
->inode
;
3235 p
= kmalloc(sizeof(*p
), GFP_KERNEL
);
3238 p
->arg
.fh
= NFS_FH(inode
);
3240 p
->arg
.seqid
= seqid
;
3241 p
->res
.seqid
= seqid
;
3242 p
->arg
.stateid
= &lsp
->ls_stateid
;
3244 atomic_inc(&lsp
->ls_count
);
3245 /* Ensure we don't close file until we're done freeing locks! */
3246 p
->ctx
= get_nfs_open_context(ctx
);
3247 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3248 p
->server
= NFS_SERVER(inode
);
3252 static void nfs4_locku_release_calldata(void *data
)
3254 struct nfs4_unlockdata
*calldata
= data
;
3255 nfs_free_seqid(calldata
->arg
.seqid
);
3256 nfs4_put_lock_state(calldata
->lsp
);
3257 put_nfs_open_context(calldata
->ctx
);
3261 static void nfs4_locku_done(struct rpc_task
*task
, void *data
)
3263 struct nfs4_unlockdata
*calldata
= data
;
3265 if (RPC_ASSASSINATED(task
))
3267 switch (task
->tk_status
) {
3269 memcpy(calldata
->lsp
->ls_stateid
.data
,
3270 calldata
->res
.stateid
.data
,
3271 sizeof(calldata
->lsp
->ls_stateid
.data
));
3272 renew_lease(calldata
->server
, calldata
->timestamp
);
3274 case -NFS4ERR_BAD_STATEID
:
3275 case -NFS4ERR_OLD_STATEID
:
3276 case -NFS4ERR_STALE_STATEID
:
3277 case -NFS4ERR_EXPIRED
:
3280 if (nfs4_async_handle_error(task
, calldata
->server
, NULL
) == -EAGAIN
)
3281 rpc_restart_call(task
);
3285 static void nfs4_locku_prepare(struct rpc_task
*task
, void *data
)
3287 struct nfs4_unlockdata
*calldata
= data
;
3289 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
3291 if ((calldata
->lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) == 0) {
3292 /* Note: exit _without_ running nfs4_locku_done */
3293 task
->tk_action
= NULL
;
3296 calldata
->timestamp
= jiffies
;
3297 rpc_call_start(task
);
3300 static const struct rpc_call_ops nfs4_locku_ops
= {
3301 .rpc_call_prepare
= nfs4_locku_prepare
,
3302 .rpc_call_done
= nfs4_locku_done
,
3303 .rpc_release
= nfs4_locku_release_calldata
,
3306 static struct rpc_task
*nfs4_do_unlck(struct file_lock
*fl
,
3307 struct nfs_open_context
*ctx
,
3308 struct nfs4_lock_state
*lsp
,
3309 struct nfs_seqid
*seqid
)
3311 struct nfs4_unlockdata
*data
;
3312 struct rpc_message msg
= {
3313 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKU
],
3314 .rpc_cred
= ctx
->cred
,
3316 struct rpc_task_setup task_setup_data
= {
3317 .rpc_client
= NFS_CLIENT(lsp
->ls_state
->inode
),
3318 .rpc_message
= &msg
,
3319 .callback_ops
= &nfs4_locku_ops
,
3320 .workqueue
= nfsiod_workqueue
,
3321 .flags
= RPC_TASK_ASYNC
,
3324 /* Ensure this is an unlock - when canceling a lock, the
3325 * canceled lock is passed in, and it won't be an unlock.
3327 fl
->fl_type
= F_UNLCK
;
3329 data
= nfs4_alloc_unlockdata(fl
, ctx
, lsp
, seqid
);
3331 nfs_free_seqid(seqid
);
3332 return ERR_PTR(-ENOMEM
);
3335 msg
.rpc_argp
= &data
->arg
,
3336 msg
.rpc_resp
= &data
->res
,
3337 task_setup_data
.callback_data
= data
;
3338 return rpc_run_task(&task_setup_data
);
3341 static int nfs4_proc_unlck(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3343 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
3344 struct nfs_seqid
*seqid
;
3345 struct nfs4_lock_state
*lsp
;
3346 struct rpc_task
*task
;
3348 unsigned char fl_flags
= request
->fl_flags
;
3350 status
= nfs4_set_lock_state(state
, request
);
3351 /* Unlock _before_ we do the RPC call */
3352 request
->fl_flags
|= FL_EXISTS
;
3353 down_read(&nfsi
->rwsem
);
3354 if (do_vfs_lock(request
->fl_file
, request
) == -ENOENT
) {
3355 up_read(&nfsi
->rwsem
);
3358 up_read(&nfsi
->rwsem
);
3361 /* Is this a delegated lock? */
3362 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
3364 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3365 seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3369 task
= nfs4_do_unlck(request
, nfs_file_open_context(request
->fl_file
), lsp
, seqid
);
3370 status
= PTR_ERR(task
);
3373 status
= nfs4_wait_for_completion_rpc_task(task
);
3376 request
->fl_flags
= fl_flags
;
3380 struct nfs4_lockdata
{
3381 struct nfs_lock_args arg
;
3382 struct nfs_lock_res res
;
3383 struct nfs4_lock_state
*lsp
;
3384 struct nfs_open_context
*ctx
;
3385 struct file_lock fl
;
3386 unsigned long timestamp
;
3391 static struct nfs4_lockdata
*nfs4_alloc_lockdata(struct file_lock
*fl
,
3392 struct nfs_open_context
*ctx
, struct nfs4_lock_state
*lsp
)
3394 struct nfs4_lockdata
*p
;
3395 struct inode
*inode
= lsp
->ls_state
->inode
;
3396 struct nfs_server
*server
= NFS_SERVER(inode
);
3398 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
3402 p
->arg
.fh
= NFS_FH(inode
);
3404 p
->arg
.open_seqid
= nfs_alloc_seqid(&lsp
->ls_state
->owner
->so_seqid
);
3405 if (p
->arg
.open_seqid
== NULL
)
3407 p
->arg
.lock_seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3408 if (p
->arg
.lock_seqid
== NULL
)
3409 goto out_free_seqid
;
3410 p
->arg
.lock_stateid
= &lsp
->ls_stateid
;
3411 p
->arg
.lock_owner
.clientid
= server
->nfs_client
->cl_clientid
;
3412 p
->arg
.lock_owner
.id
= lsp
->ls_id
.id
;
3413 p
->res
.lock_seqid
= p
->arg
.lock_seqid
;
3415 atomic_inc(&lsp
->ls_count
);
3416 p
->ctx
= get_nfs_open_context(ctx
);
3417 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3420 nfs_free_seqid(p
->arg
.open_seqid
);
3426 static void nfs4_lock_prepare(struct rpc_task
*task
, void *calldata
)
3428 struct nfs4_lockdata
*data
= calldata
;
3429 struct nfs4_state
*state
= data
->lsp
->ls_state
;
3431 dprintk("%s: begin!\n", __func__
);
3432 if (nfs_wait_on_sequence(data
->arg
.lock_seqid
, task
) != 0)
3434 /* Do we need to do an open_to_lock_owner? */
3435 if (!(data
->arg
.lock_seqid
->sequence
->flags
& NFS_SEQID_CONFIRMED
)) {
3436 if (nfs_wait_on_sequence(data
->arg
.open_seqid
, task
) != 0)
3438 data
->arg
.open_stateid
= &state
->stateid
;
3439 data
->arg
.new_lock_owner
= 1;
3440 data
->res
.open_seqid
= data
->arg
.open_seqid
;
3442 data
->arg
.new_lock_owner
= 0;
3443 data
->timestamp
= jiffies
;
3444 rpc_call_start(task
);
3445 dprintk("%s: done!, ret = %d\n", __func__
, data
->rpc_status
);
3448 static void nfs4_lock_done(struct rpc_task
*task
, void *calldata
)
3450 struct nfs4_lockdata
*data
= calldata
;
3452 dprintk("%s: begin!\n", __func__
);
3454 data
->rpc_status
= task
->tk_status
;
3455 if (RPC_ASSASSINATED(task
))
3457 if (data
->arg
.new_lock_owner
!= 0) {
3458 if (data
->rpc_status
== 0)
3459 nfs_confirm_seqid(&data
->lsp
->ls_seqid
, 0);
3463 if (data
->rpc_status
== 0) {
3464 memcpy(data
->lsp
->ls_stateid
.data
, data
->res
.stateid
.data
,
3465 sizeof(data
->lsp
->ls_stateid
.data
));
3466 data
->lsp
->ls_flags
|= NFS_LOCK_INITIALIZED
;
3467 renew_lease(NFS_SERVER(data
->ctx
->path
.dentry
->d_inode
), data
->timestamp
);
3470 dprintk("%s: done, ret = %d!\n", __func__
, data
->rpc_status
);
3473 static void nfs4_lock_release(void *calldata
)
3475 struct nfs4_lockdata
*data
= calldata
;
3477 dprintk("%s: begin!\n", __func__
);
3478 nfs_free_seqid(data
->arg
.open_seqid
);
3479 if (data
->cancelled
!= 0) {
3480 struct rpc_task
*task
;
3481 task
= nfs4_do_unlck(&data
->fl
, data
->ctx
, data
->lsp
,
3482 data
->arg
.lock_seqid
);
3485 dprintk("%s: cancelling lock!\n", __func__
);
3487 nfs_free_seqid(data
->arg
.lock_seqid
);
3488 nfs4_put_lock_state(data
->lsp
);
3489 put_nfs_open_context(data
->ctx
);
3491 dprintk("%s: done!\n", __func__
);
3494 static const struct rpc_call_ops nfs4_lock_ops
= {
3495 .rpc_call_prepare
= nfs4_lock_prepare
,
3496 .rpc_call_done
= nfs4_lock_done
,
3497 .rpc_release
= nfs4_lock_release
,
3500 static int _nfs4_do_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*fl
, int reclaim
)
3502 struct nfs4_lockdata
*data
;
3503 struct rpc_task
*task
;
3504 struct rpc_message msg
= {
3505 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCK
],
3506 .rpc_cred
= state
->owner
->so_cred
,
3508 struct rpc_task_setup task_setup_data
= {
3509 .rpc_client
= NFS_CLIENT(state
->inode
),
3510 .rpc_message
= &msg
,
3511 .callback_ops
= &nfs4_lock_ops
,
3512 .workqueue
= nfsiod_workqueue
,
3513 .flags
= RPC_TASK_ASYNC
,
3517 dprintk("%s: begin!\n", __func__
);
3518 data
= nfs4_alloc_lockdata(fl
, nfs_file_open_context(fl
->fl_file
),
3519 fl
->fl_u
.nfs4_fl
.owner
);
3523 data
->arg
.block
= 1;
3525 data
->arg
.reclaim
= 1;
3526 msg
.rpc_argp
= &data
->arg
,
3527 msg
.rpc_resp
= &data
->res
,
3528 task_setup_data
.callback_data
= data
;
3529 task
= rpc_run_task(&task_setup_data
);
3531 return PTR_ERR(task
);
3532 ret
= nfs4_wait_for_completion_rpc_task(task
);
3534 ret
= data
->rpc_status
;
3535 if (ret
== -NFS4ERR_DENIED
)
3538 data
->cancelled
= 1;
3540 dprintk("%s: done, ret = %d!\n", __func__
, ret
);
3544 static int nfs4_lock_reclaim(struct nfs4_state
*state
, struct file_lock
*request
)
3546 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3547 struct nfs4_exception exception
= { };
3551 /* Cache the lock if possible... */
3552 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
3554 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 1);
3555 if (err
!= -NFS4ERR_DELAY
)
3557 nfs4_handle_exception(server
, err
, &exception
);
3558 } while (exception
.retry
);
3562 static int nfs4_lock_expired(struct nfs4_state
*state
, struct file_lock
*request
)
3564 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3565 struct nfs4_exception exception
= { };
3568 err
= nfs4_set_lock_state(state
, request
);
3572 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
3574 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 0);
3575 if (err
!= -NFS4ERR_DELAY
)
3577 nfs4_handle_exception(server
, err
, &exception
);
3578 } while (exception
.retry
);
3582 static int _nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3584 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
3585 unsigned char fl_flags
= request
->fl_flags
;
3588 /* Is this a delegated open? */
3589 status
= nfs4_set_lock_state(state
, request
);
3592 request
->fl_flags
|= FL_ACCESS
;
3593 status
= do_vfs_lock(request
->fl_file
, request
);
3596 down_read(&nfsi
->rwsem
);
3597 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
)) {
3598 /* Yes: cache locks! */
3599 /* ...but avoid races with delegation recall... */
3600 request
->fl_flags
= fl_flags
& ~FL_SLEEP
;
3601 status
= do_vfs_lock(request
->fl_file
, request
);
3604 status
= _nfs4_do_setlk(state
, cmd
, request
, 0);
3607 /* Note: we always want to sleep here! */
3608 request
->fl_flags
= fl_flags
| FL_SLEEP
;
3609 if (do_vfs_lock(request
->fl_file
, request
) < 0)
3610 printk(KERN_WARNING
"%s: VFS is out of sync with lock manager!\n", __func__
);
3612 up_read(&nfsi
->rwsem
);
3614 request
->fl_flags
= fl_flags
;
3618 static int nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3620 struct nfs4_exception exception
= { };
3624 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3625 _nfs4_proc_setlk(state
, cmd
, request
),
3627 } while (exception
.retry
);
3632 nfs4_proc_lock(struct file
*filp
, int cmd
, struct file_lock
*request
)
3634 struct nfs_open_context
*ctx
;
3635 struct nfs4_state
*state
;
3636 unsigned long timeout
= NFS4_LOCK_MINTIMEOUT
;
3639 /* verify open state */
3640 ctx
= nfs_file_open_context(filp
);
3643 if (request
->fl_start
< 0 || request
->fl_end
< 0)
3647 return nfs4_proc_getlk(state
, F_GETLK
, request
);
3649 if (!(IS_SETLK(cmd
) || IS_SETLKW(cmd
)))
3652 if (request
->fl_type
== F_UNLCK
)
3653 return nfs4_proc_unlck(state
, cmd
, request
);
3656 status
= nfs4_proc_setlk(state
, cmd
, request
);
3657 if ((status
!= -EAGAIN
) || IS_SETLK(cmd
))
3659 timeout
= nfs4_set_lock_task_retry(timeout
);
3660 status
= -ERESTARTSYS
;
3663 } while(status
< 0);
3667 int nfs4_lock_delegation_recall(struct nfs4_state
*state
, struct file_lock
*fl
)
3669 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3670 struct nfs4_exception exception
= { };
3673 err
= nfs4_set_lock_state(state
, fl
);
3677 err
= _nfs4_do_setlk(state
, F_SETLK
, fl
, 0);
3678 if (err
!= -NFS4ERR_DELAY
)
3680 err
= nfs4_handle_exception(server
, err
, &exception
);
3681 } while (exception
.retry
);
3686 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3688 int nfs4_setxattr(struct dentry
*dentry
, const char *key
, const void *buf
,
3689 size_t buflen
, int flags
)
3691 struct inode
*inode
= dentry
->d_inode
;
3693 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
3696 return nfs4_proc_set_acl(inode
, buf
, buflen
);
3699 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3700 * and that's what we'll do for e.g. user attributes that haven't been set.
3701 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3702 * attributes in kernel-managed attribute namespaces. */
3703 ssize_t
nfs4_getxattr(struct dentry
*dentry
, const char *key
, void *buf
,
3706 struct inode
*inode
= dentry
->d_inode
;
3708 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
3711 return nfs4_proc_get_acl(inode
, buf
, buflen
);
3714 ssize_t
nfs4_listxattr(struct dentry
*dentry
, char *buf
, size_t buflen
)
3716 size_t len
= strlen(XATTR_NAME_NFSV4_ACL
) + 1;
3718 if (!nfs4_server_supports_acls(NFS_SERVER(dentry
->d_inode
)))
3720 if (buf
&& buflen
< len
)
3723 memcpy(buf
, XATTR_NAME_NFSV4_ACL
, len
);
3727 static void nfs_fixup_referral_attributes(struct nfs_fattr
*fattr
)
3729 if (!((fattr
->valid
& NFS_ATTR_FATTR_FILEID
) &&
3730 (fattr
->valid
& NFS_ATTR_FATTR_FSID
) &&
3731 (fattr
->valid
& NFS_ATTR_FATTR_V4_REFERRAL
)))
3734 fattr
->valid
|= NFS_ATTR_FATTR_TYPE
| NFS_ATTR_FATTR_MODE
|
3735 NFS_ATTR_FATTR_NLINK
;
3736 fattr
->mode
= S_IFDIR
| S_IRUGO
| S_IXUGO
;
3740 int nfs4_proc_fs_locations(struct inode
*dir
, const struct qstr
*name
,
3741 struct nfs4_fs_locations
*fs_locations
, struct page
*page
)
3743 struct nfs_server
*server
= NFS_SERVER(dir
);
3745 [0] = FATTR4_WORD0_FSID
| FATTR4_WORD0_FS_LOCATIONS
,
3746 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID
,
3748 struct nfs4_fs_locations_arg args
= {
3749 .dir_fh
= NFS_FH(dir
),
3754 struct nfs4_fs_locations_res res
= {
3755 .fs_locations
= fs_locations
,
3757 struct rpc_message msg
= {
3758 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FS_LOCATIONS
],
3764 dprintk("%s: start\n", __func__
);
3765 nfs_fattr_init(&fs_locations
->fattr
);
3766 fs_locations
->server
= server
;
3767 fs_locations
->nlocations
= 0;
3768 status
= nfs4_call_sync(server
, &msg
, &args
, &res
, 0);
3769 nfs_fixup_referral_attributes(&fs_locations
->fattr
);
3770 dprintk("%s: returned status = %d\n", __func__
, status
);
3774 #ifdef CONFIG_NFS_V4_1
3775 /* Destroy the slot table */
3776 static void nfs4_destroy_slot_table(struct nfs4_session
*session
)
3778 if (session
->fc_slot_table
.slots
== NULL
)
3780 kfree(session
->fc_slot_table
.slots
);
3781 session
->fc_slot_table
.slots
= NULL
;
3785 struct nfs4_session
*nfs4_alloc_session(struct nfs_client
*clp
)
3787 struct nfs4_session
*session
;
3788 struct nfs4_slot_table
*tbl
;
3790 session
= kzalloc(sizeof(struct nfs4_session
), GFP_KERNEL
);
3793 tbl
= &session
->fc_slot_table
;
3794 spin_lock_init(&tbl
->slot_tbl_lock
);
3795 rpc_init_wait_queue(&tbl
->slot_tbl_waitq
, "Slot table");
3800 void nfs4_destroy_session(struct nfs4_session
*session
)
3802 nfs4_destroy_slot_table(session
);
3806 #endif /* CONFIG_NFS_V4_1 */
3808 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops
= {
3809 .owner_flag_bit
= NFS_OWNER_RECLAIM_REBOOT
,
3810 .state_flag_bit
= NFS_STATE_RECLAIM_REBOOT
,
3811 .recover_open
= nfs4_open_reclaim
,
3812 .recover_lock
= nfs4_lock_reclaim
,
3815 struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops
= {
3816 .owner_flag_bit
= NFS_OWNER_RECLAIM_NOGRACE
,
3817 .state_flag_bit
= NFS_STATE_RECLAIM_NOGRACE
,
3818 .recover_open
= nfs4_open_expired
,
3819 .recover_lock
= nfs4_lock_expired
,
3822 static const struct inode_operations nfs4_file_inode_operations
= {
3823 .permission
= nfs_permission
,
3824 .getattr
= nfs_getattr
,
3825 .setattr
= nfs_setattr
,
3826 .getxattr
= nfs4_getxattr
,
3827 .setxattr
= nfs4_setxattr
,
3828 .listxattr
= nfs4_listxattr
,
3831 const struct nfs_rpc_ops nfs_v4_clientops
= {
3832 .version
= 4, /* protocol version */
3833 .dentry_ops
= &nfs4_dentry_operations
,
3834 .dir_inode_ops
= &nfs4_dir_inode_operations
,
3835 .file_inode_ops
= &nfs4_file_inode_operations
,
3836 .getroot
= nfs4_proc_get_root
,
3837 .getattr
= nfs4_proc_getattr
,
3838 .setattr
= nfs4_proc_setattr
,
3839 .lookupfh
= nfs4_proc_lookupfh
,
3840 .lookup
= nfs4_proc_lookup
,
3841 .access
= nfs4_proc_access
,
3842 .readlink
= nfs4_proc_readlink
,
3843 .create
= nfs4_proc_create
,
3844 .remove
= nfs4_proc_remove
,
3845 .unlink_setup
= nfs4_proc_unlink_setup
,
3846 .unlink_done
= nfs4_proc_unlink_done
,
3847 .rename
= nfs4_proc_rename
,
3848 .link
= nfs4_proc_link
,
3849 .symlink
= nfs4_proc_symlink
,
3850 .mkdir
= nfs4_proc_mkdir
,
3851 .rmdir
= nfs4_proc_remove
,
3852 .readdir
= nfs4_proc_readdir
,
3853 .mknod
= nfs4_proc_mknod
,
3854 .statfs
= nfs4_proc_statfs
,
3855 .fsinfo
= nfs4_proc_fsinfo
,
3856 .pathconf
= nfs4_proc_pathconf
,
3857 .set_capabilities
= nfs4_server_capabilities
,
3858 .decode_dirent
= nfs4_decode_dirent
,
3859 .read_setup
= nfs4_proc_read_setup
,
3860 .read_done
= nfs4_read_done
,
3861 .write_setup
= nfs4_proc_write_setup
,
3862 .write_done
= nfs4_write_done
,
3863 .commit_setup
= nfs4_proc_commit_setup
,
3864 .commit_done
= nfs4_commit_done
,
3865 .lock
= nfs4_proc_lock
,
3866 .clear_acl_cache
= nfs4_zap_acl_attr
,
3867 .close_context
= nfs4_close_context
,