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
*);
66 static int nfs4_handle_exception(const struct nfs_server
*server
, int errorcode
, struct nfs4_exception
*exception
);
67 static int nfs4_wait_clnt_recover(struct rpc_clnt
*clnt
, struct nfs_client
*clp
);
68 static int _nfs4_proc_lookup(struct inode
*dir
, const struct qstr
*name
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
);
69 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
);
71 /* Prevent leaks of NFSv4 errors into userland */
72 int nfs4_map_errors(int err
)
75 dprintk("%s could not handle NFSv4 error %d\n",
83 * This is our standard bitmap for GETATTR requests.
85 const u32 nfs4_fattr_bitmap
[2] = {
90 | FATTR4_WORD0_FILEID
,
92 | FATTR4_WORD1_NUMLINKS
94 | FATTR4_WORD1_OWNER_GROUP
96 | FATTR4_WORD1_SPACE_USED
97 | FATTR4_WORD1_TIME_ACCESS
98 | FATTR4_WORD1_TIME_METADATA
99 | FATTR4_WORD1_TIME_MODIFY
102 const u32 nfs4_statfs_bitmap
[2] = {
103 FATTR4_WORD0_FILES_AVAIL
104 | FATTR4_WORD0_FILES_FREE
105 | FATTR4_WORD0_FILES_TOTAL
,
106 FATTR4_WORD1_SPACE_AVAIL
107 | FATTR4_WORD1_SPACE_FREE
108 | FATTR4_WORD1_SPACE_TOTAL
111 const u32 nfs4_pathconf_bitmap
[2] = {
113 | FATTR4_WORD0_MAXNAME
,
117 const u32 nfs4_fsinfo_bitmap
[2] = { FATTR4_WORD0_MAXFILESIZE
118 | FATTR4_WORD0_MAXREAD
119 | FATTR4_WORD0_MAXWRITE
120 | FATTR4_WORD0_LEASE_TIME
,
124 const u32 nfs4_fs_locations_bitmap
[2] = {
126 | FATTR4_WORD0_CHANGE
129 | FATTR4_WORD0_FILEID
130 | FATTR4_WORD0_FS_LOCATIONS
,
132 | FATTR4_WORD1_NUMLINKS
134 | FATTR4_WORD1_OWNER_GROUP
135 | FATTR4_WORD1_RAWDEV
136 | FATTR4_WORD1_SPACE_USED
137 | FATTR4_WORD1_TIME_ACCESS
138 | FATTR4_WORD1_TIME_METADATA
139 | FATTR4_WORD1_TIME_MODIFY
140 | FATTR4_WORD1_MOUNTED_ON_FILEID
143 static void nfs4_setup_readdir(u64 cookie
, __be32
*verifier
, struct dentry
*dentry
,
144 struct nfs4_readdir_arg
*readdir
)
148 BUG_ON(readdir
->count
< 80);
150 readdir
->cookie
= cookie
;
151 memcpy(&readdir
->verifier
, verifier
, sizeof(readdir
->verifier
));
156 memset(&readdir
->verifier
, 0, sizeof(readdir
->verifier
));
161 * NFSv4 servers do not return entries for '.' and '..'
162 * Therefore, we fake these entries here. We let '.'
163 * have cookie 0 and '..' have cookie 1. Note that
164 * when talking to the server, we always send cookie 0
167 start
= p
= kmap_atomic(*readdir
->pages
, KM_USER0
);
170 *p
++ = xdr_one
; /* next */
171 *p
++ = xdr_zero
; /* cookie, first word */
172 *p
++ = xdr_one
; /* cookie, second word */
173 *p
++ = xdr_one
; /* entry len */
174 memcpy(p
, ".\0\0\0", 4); /* entry */
176 *p
++ = xdr_one
; /* bitmap length */
177 *p
++ = htonl(FATTR4_WORD0_FILEID
); /* bitmap */
178 *p
++ = htonl(8); /* attribute buffer length */
179 p
= xdr_encode_hyper(p
, NFS_FILEID(dentry
->d_inode
));
182 *p
++ = xdr_one
; /* next */
183 *p
++ = xdr_zero
; /* cookie, first word */
184 *p
++ = xdr_two
; /* cookie, second word */
185 *p
++ = xdr_two
; /* entry len */
186 memcpy(p
, "..\0\0", 4); /* entry */
188 *p
++ = xdr_one
; /* bitmap length */
189 *p
++ = htonl(FATTR4_WORD0_FILEID
); /* bitmap */
190 *p
++ = htonl(8); /* attribute buffer length */
191 p
= xdr_encode_hyper(p
, NFS_FILEID(dentry
->d_parent
->d_inode
));
193 readdir
->pgbase
= (char *)p
- (char *)start
;
194 readdir
->count
-= readdir
->pgbase
;
195 kunmap_atomic(start
, KM_USER0
);
198 static void renew_lease(const struct nfs_server
*server
, unsigned long timestamp
)
200 struct nfs_client
*clp
= server
->nfs_client
;
201 spin_lock(&clp
->cl_lock
);
202 if (time_before(clp
->cl_last_renewal
,timestamp
))
203 clp
->cl_last_renewal
= timestamp
;
204 spin_unlock(&clp
->cl_lock
);
207 static void update_changeattr(struct inode
*dir
, struct nfs4_change_info
*cinfo
)
209 struct nfs_inode
*nfsi
= NFS_I(dir
);
211 spin_lock(&dir
->i_lock
);
212 nfsi
->cache_validity
|= NFS_INO_INVALID_ATTR
|NFS_INO_REVAL_PAGECACHE
|NFS_INO_INVALID_DATA
;
213 if (!cinfo
->atomic
|| cinfo
->before
!= nfsi
->change_attr
)
214 nfs_force_lookup_revalidate(dir
);
215 nfsi
->change_attr
= cinfo
->after
;
216 spin_unlock(&dir
->i_lock
);
219 struct nfs4_opendata
{
221 struct nfs_openargs o_arg
;
222 struct nfs_openres o_res
;
223 struct nfs_open_confirmargs c_arg
;
224 struct nfs_open_confirmres c_res
;
225 struct nfs_fattr f_attr
;
226 struct nfs_fattr dir_attr
;
229 struct nfs4_state_owner
*owner
;
230 struct nfs4_state
*state
;
232 unsigned long timestamp
;
233 unsigned int rpc_done
: 1;
239 static void nfs4_init_opendata_res(struct nfs4_opendata
*p
)
241 p
->o_res
.f_attr
= &p
->f_attr
;
242 p
->o_res
.dir_attr
= &p
->dir_attr
;
243 p
->o_res
.seqid
= p
->o_arg
.seqid
;
244 p
->c_res
.seqid
= p
->c_arg
.seqid
;
245 p
->o_res
.server
= p
->o_arg
.server
;
246 nfs_fattr_init(&p
->f_attr
);
247 nfs_fattr_init(&p
->dir_attr
);
250 static struct nfs4_opendata
*nfs4_opendata_alloc(struct path
*path
,
251 struct nfs4_state_owner
*sp
, int flags
,
252 const struct iattr
*attrs
)
254 struct dentry
*parent
= dget_parent(path
->dentry
);
255 struct inode
*dir
= parent
->d_inode
;
256 struct nfs_server
*server
= NFS_SERVER(dir
);
257 struct nfs4_opendata
*p
;
259 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
262 p
->o_arg
.seqid
= nfs_alloc_seqid(&sp
->so_seqid
);
263 if (p
->o_arg
.seqid
== NULL
)
265 p
->path
.mnt
= mntget(path
->mnt
);
266 p
->path
.dentry
= dget(path
->dentry
);
269 atomic_inc(&sp
->so_count
);
270 p
->o_arg
.fh
= NFS_FH(dir
);
271 p
->o_arg
.open_flags
= flags
,
272 p
->o_arg
.clientid
= server
->nfs_client
->cl_clientid
;
273 p
->o_arg
.id
= sp
->so_owner_id
.id
;
274 p
->o_arg
.name
= &p
->path
.dentry
->d_name
;
275 p
->o_arg
.server
= server
;
276 p
->o_arg
.bitmask
= server
->attr_bitmask
;
277 p
->o_arg
.claim
= NFS4_OPEN_CLAIM_NULL
;
278 if (flags
& O_EXCL
) {
279 u32
*s
= (u32
*) p
->o_arg
.u
.verifier
.data
;
282 } else if (flags
& O_CREAT
) {
283 p
->o_arg
.u
.attrs
= &p
->attrs
;
284 memcpy(&p
->attrs
, attrs
, sizeof(p
->attrs
));
286 p
->c_arg
.fh
= &p
->o_res
.fh
;
287 p
->c_arg
.stateid
= &p
->o_res
.stateid
;
288 p
->c_arg
.seqid
= p
->o_arg
.seqid
;
289 nfs4_init_opendata_res(p
);
299 static void nfs4_opendata_free(struct kref
*kref
)
301 struct nfs4_opendata
*p
= container_of(kref
,
302 struct nfs4_opendata
, kref
);
304 nfs_free_seqid(p
->o_arg
.seqid
);
305 if (p
->state
!= NULL
)
306 nfs4_put_open_state(p
->state
);
307 nfs4_put_state_owner(p
->owner
);
313 static void nfs4_opendata_put(struct nfs4_opendata
*p
)
316 kref_put(&p
->kref
, nfs4_opendata_free
);
319 static int nfs4_wait_for_completion_rpc_task(struct rpc_task
*task
)
323 ret
= rpc_wait_for_completion_task(task
);
327 static int can_open_cached(struct nfs4_state
*state
, int mode
)
330 switch (mode
& (FMODE_READ
|FMODE_WRITE
|O_EXCL
)) {
332 ret
|= test_bit(NFS_O_RDONLY_STATE
, &state
->flags
) != 0;
335 ret
|= test_bit(NFS_O_WRONLY_STATE
, &state
->flags
) != 0;
337 case FMODE_READ
|FMODE_WRITE
:
338 ret
|= test_bit(NFS_O_RDWR_STATE
, &state
->flags
) != 0;
343 static int can_open_delegated(struct nfs_delegation
*delegation
, mode_t open_flags
)
345 if ((delegation
->type
& open_flags
) != open_flags
)
347 if (test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
))
352 static void update_open_stateflags(struct nfs4_state
*state
, mode_t open_flags
)
354 switch (open_flags
) {
361 case FMODE_READ
|FMODE_WRITE
:
364 nfs4_state_set_mode_locked(state
, state
->state
| open_flags
);
367 static void nfs_set_open_stateid_locked(struct nfs4_state
*state
, nfs4_stateid
*stateid
, int open_flags
)
369 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0)
370 memcpy(state
->stateid
.data
, stateid
->data
, sizeof(state
->stateid
.data
));
371 memcpy(state
->open_stateid
.data
, stateid
->data
, sizeof(state
->open_stateid
.data
));
372 switch (open_flags
) {
374 set_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
377 set_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
379 case FMODE_READ
|FMODE_WRITE
:
380 set_bit(NFS_O_RDWR_STATE
, &state
->flags
);
384 static void nfs_set_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*stateid
, int open_flags
)
386 write_seqlock(&state
->seqlock
);
387 nfs_set_open_stateid_locked(state
, stateid
, open_flags
);
388 write_sequnlock(&state
->seqlock
);
391 static void __update_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*open_stateid
, const nfs4_stateid
*deleg_stateid
, int open_flags
)
394 * Protect the call to nfs4_state_set_mode_locked and
395 * serialise the stateid update
397 write_seqlock(&state
->seqlock
);
398 if (deleg_stateid
!= NULL
) {
399 memcpy(state
->stateid
.data
, deleg_stateid
->data
, sizeof(state
->stateid
.data
));
400 set_bit(NFS_DELEGATED_STATE
, &state
->flags
);
402 if (open_stateid
!= NULL
)
403 nfs_set_open_stateid_locked(state
, open_stateid
, open_flags
);
404 write_sequnlock(&state
->seqlock
);
405 spin_lock(&state
->owner
->so_lock
);
406 update_open_stateflags(state
, open_flags
);
407 spin_unlock(&state
->owner
->so_lock
);
410 static int update_open_stateid(struct nfs4_state
*state
, nfs4_stateid
*open_stateid
, nfs4_stateid
*delegation
, int open_flags
)
412 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
413 struct nfs_delegation
*deleg_cur
;
416 open_flags
&= (FMODE_READ
|FMODE_WRITE
);
419 deleg_cur
= rcu_dereference(nfsi
->delegation
);
420 if (deleg_cur
== NULL
)
423 spin_lock(&deleg_cur
->lock
);
424 if (nfsi
->delegation
!= deleg_cur
||
425 (deleg_cur
->type
& open_flags
) != open_flags
)
426 goto no_delegation_unlock
;
428 if (delegation
== NULL
)
429 delegation
= &deleg_cur
->stateid
;
430 else if (memcmp(deleg_cur
->stateid
.data
, delegation
->data
, NFS4_STATEID_SIZE
) != 0)
431 goto no_delegation_unlock
;
433 __update_open_stateid(state
, open_stateid
, &deleg_cur
->stateid
, open_flags
);
435 no_delegation_unlock
:
436 spin_unlock(&deleg_cur
->lock
);
440 if (!ret
&& open_stateid
!= NULL
) {
441 __update_open_stateid(state
, open_stateid
, NULL
, open_flags
);
449 static void nfs4_return_incompatible_delegation(struct inode
*inode
, mode_t open_flags
)
451 struct nfs_delegation
*delegation
;
454 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
455 if (delegation
== NULL
|| (delegation
->type
& open_flags
) == open_flags
) {
460 nfs_inode_return_delegation(inode
);
463 static struct nfs4_state
*nfs4_try_open_cached(struct nfs4_opendata
*opendata
)
465 struct nfs4_state
*state
= opendata
->state
;
466 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
467 struct nfs_delegation
*delegation
;
468 int open_mode
= opendata
->o_arg
.open_flags
& (FMODE_READ
|FMODE_WRITE
|O_EXCL
);
469 nfs4_stateid stateid
;
473 if (can_open_cached(state
, open_mode
)) {
474 spin_lock(&state
->owner
->so_lock
);
475 if (can_open_cached(state
, open_mode
)) {
476 update_open_stateflags(state
, open_mode
);
477 spin_unlock(&state
->owner
->so_lock
);
478 goto out_return_state
;
480 spin_unlock(&state
->owner
->so_lock
);
483 delegation
= rcu_dereference(nfsi
->delegation
);
484 if (delegation
== NULL
||
485 !can_open_delegated(delegation
, open_mode
)) {
489 /* Save the delegation */
490 memcpy(stateid
.data
, delegation
->stateid
.data
, sizeof(stateid
.data
));
492 ret
= nfs_may_open(state
->inode
, state
->owner
->so_cred
, open_mode
);
497 /* Try to update the stateid using the delegation */
498 if (update_open_stateid(state
, NULL
, &stateid
, open_mode
))
499 goto out_return_state
;
504 atomic_inc(&state
->count
);
508 static struct nfs4_state
*nfs4_opendata_to_nfs4_state(struct nfs4_opendata
*data
)
511 struct nfs4_state
*state
= NULL
;
512 struct nfs_delegation
*delegation
;
515 if (!data
->rpc_done
) {
516 state
= nfs4_try_open_cached(data
);
521 if (!(data
->f_attr
.valid
& NFS_ATTR_FATTR
))
523 inode
= nfs_fhget(data
->dir
->d_sb
, &data
->o_res
.fh
, &data
->f_attr
);
524 ret
= PTR_ERR(inode
);
528 state
= nfs4_get_open_state(inode
, data
->owner
);
531 if (data
->o_res
.delegation_type
!= 0) {
532 int delegation_flags
= 0;
535 delegation
= rcu_dereference(NFS_I(inode
)->delegation
);
537 delegation_flags
= delegation
->flags
;
539 if ((delegation_flags
& 1UL<<NFS_DELEGATION_NEED_RECLAIM
) == 0)
540 nfs_inode_set_delegation(state
->inode
,
541 data
->owner
->so_cred
,
544 nfs_inode_reclaim_delegation(state
->inode
,
545 data
->owner
->so_cred
,
549 update_open_stateid(state
, &data
->o_res
.stateid
, NULL
,
550 data
->o_arg
.open_flags
);
560 static struct nfs_open_context
*nfs4_state_find_open_context(struct nfs4_state
*state
)
562 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
563 struct nfs_open_context
*ctx
;
565 spin_lock(&state
->inode
->i_lock
);
566 list_for_each_entry(ctx
, &nfsi
->open_files
, list
) {
567 if (ctx
->state
!= state
)
569 get_nfs_open_context(ctx
);
570 spin_unlock(&state
->inode
->i_lock
);
573 spin_unlock(&state
->inode
->i_lock
);
574 return ERR_PTR(-ENOENT
);
577 static struct nfs4_opendata
*nfs4_open_recoverdata_alloc(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
579 struct nfs4_opendata
*opendata
;
581 opendata
= nfs4_opendata_alloc(&ctx
->path
, state
->owner
, 0, NULL
);
582 if (opendata
== NULL
)
583 return ERR_PTR(-ENOMEM
);
584 opendata
->state
= state
;
585 atomic_inc(&state
->count
);
589 static int nfs4_open_recover_helper(struct nfs4_opendata
*opendata
, mode_t openflags
, struct nfs4_state
**res
)
591 struct nfs4_state
*newstate
;
594 opendata
->o_arg
.open_flags
= openflags
;
595 memset(&opendata
->o_res
, 0, sizeof(opendata
->o_res
));
596 memset(&opendata
->c_res
, 0, sizeof(opendata
->c_res
));
597 nfs4_init_opendata_res(opendata
);
598 ret
= _nfs4_proc_open(opendata
);
601 newstate
= nfs4_opendata_to_nfs4_state(opendata
);
602 if (IS_ERR(newstate
))
603 return PTR_ERR(newstate
);
604 nfs4_close_state(&opendata
->path
, newstate
, openflags
);
609 static int nfs4_open_recover(struct nfs4_opendata
*opendata
, struct nfs4_state
*state
)
611 struct nfs4_state
*newstate
;
614 /* memory barrier prior to reading state->n_* */
615 clear_bit(NFS_DELEGATED_STATE
, &state
->flags
);
617 if (state
->n_rdwr
!= 0) {
618 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
|FMODE_WRITE
, &newstate
);
621 if (newstate
!= state
)
624 if (state
->n_wronly
!= 0) {
625 ret
= nfs4_open_recover_helper(opendata
, FMODE_WRITE
, &newstate
);
628 if (newstate
!= state
)
631 if (state
->n_rdonly
!= 0) {
632 ret
= nfs4_open_recover_helper(opendata
, FMODE_READ
, &newstate
);
635 if (newstate
!= state
)
639 * We may have performed cached opens for all three recoveries.
640 * Check if we need to update the current stateid.
642 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0 &&
643 memcmp(state
->stateid
.data
, state
->open_stateid
.data
, sizeof(state
->stateid
.data
)) != 0) {
644 write_seqlock(&state
->seqlock
);
645 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) == 0)
646 memcpy(state
->stateid
.data
, state
->open_stateid
.data
, sizeof(state
->stateid
.data
));
647 write_sequnlock(&state
->seqlock
);
654 * reclaim state on the server after a reboot.
656 static int _nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
658 struct nfs_delegation
*delegation
;
659 struct nfs4_opendata
*opendata
;
660 int delegation_type
= 0;
663 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
664 if (IS_ERR(opendata
))
665 return PTR_ERR(opendata
);
666 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_PREVIOUS
;
667 opendata
->o_arg
.fh
= NFS_FH(state
->inode
);
669 delegation
= rcu_dereference(NFS_I(state
->inode
)->delegation
);
670 if (delegation
!= NULL
&& test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
) != 0)
671 delegation_type
= delegation
->type
;
673 opendata
->o_arg
.u
.delegation_type
= delegation_type
;
674 status
= nfs4_open_recover(opendata
, state
);
675 nfs4_opendata_put(opendata
);
679 static int nfs4_do_open_reclaim(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
681 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
682 struct nfs4_exception exception
= { };
685 err
= _nfs4_do_open_reclaim(ctx
, state
);
686 if (err
!= -NFS4ERR_DELAY
)
688 nfs4_handle_exception(server
, err
, &exception
);
689 } while (exception
.retry
);
693 static int nfs4_open_reclaim(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
695 struct nfs_open_context
*ctx
;
698 ctx
= nfs4_state_find_open_context(state
);
701 ret
= nfs4_do_open_reclaim(ctx
, state
);
702 put_nfs_open_context(ctx
);
706 static int _nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
708 struct nfs4_opendata
*opendata
;
711 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
712 if (IS_ERR(opendata
))
713 return PTR_ERR(opendata
);
714 opendata
->o_arg
.claim
= NFS4_OPEN_CLAIM_DELEGATE_CUR
;
715 memcpy(opendata
->o_arg
.u
.delegation
.data
, stateid
->data
,
716 sizeof(opendata
->o_arg
.u
.delegation
.data
));
717 ret
= nfs4_open_recover(opendata
, state
);
718 nfs4_opendata_put(opendata
);
722 int nfs4_open_delegation_recall(struct nfs_open_context
*ctx
, struct nfs4_state
*state
, const nfs4_stateid
*stateid
)
724 struct nfs4_exception exception
= { };
725 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
728 err
= _nfs4_open_delegation_recall(ctx
, state
, stateid
);
732 case -NFS4ERR_STALE_CLIENTID
:
733 case -NFS4ERR_STALE_STATEID
:
734 case -NFS4ERR_EXPIRED
:
735 /* Don't recall a delegation if it was lost */
736 nfs4_schedule_state_recovery(server
->nfs_client
);
739 err
= nfs4_handle_exception(server
, err
, &exception
);
740 } while (exception
.retry
);
744 static void nfs4_open_confirm_done(struct rpc_task
*task
, void *calldata
)
746 struct nfs4_opendata
*data
= calldata
;
748 data
->rpc_status
= task
->tk_status
;
749 if (RPC_ASSASSINATED(task
))
751 if (data
->rpc_status
== 0) {
752 memcpy(data
->o_res
.stateid
.data
, data
->c_res
.stateid
.data
,
753 sizeof(data
->o_res
.stateid
.data
));
754 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
755 renew_lease(data
->o_res
.server
, data
->timestamp
);
760 static void nfs4_open_confirm_release(void *calldata
)
762 struct nfs4_opendata
*data
= calldata
;
763 struct nfs4_state
*state
= NULL
;
765 /* If this request hasn't been cancelled, do nothing */
766 if (data
->cancelled
== 0)
768 /* In case of error, no cleanup! */
771 state
= nfs4_opendata_to_nfs4_state(data
);
773 nfs4_close_state(&data
->path
, state
, data
->o_arg
.open_flags
);
775 nfs4_opendata_put(data
);
778 static const struct rpc_call_ops nfs4_open_confirm_ops
= {
779 .rpc_call_done
= nfs4_open_confirm_done
,
780 .rpc_release
= nfs4_open_confirm_release
,
784 * Note: On error, nfs4_proc_open_confirm will free the struct nfs4_opendata
786 static int _nfs4_proc_open_confirm(struct nfs4_opendata
*data
)
788 struct nfs_server
*server
= NFS_SERVER(data
->dir
->d_inode
);
789 struct rpc_task
*task
;
790 struct rpc_message msg
= {
791 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_CONFIRM
],
792 .rpc_argp
= &data
->c_arg
,
793 .rpc_resp
= &data
->c_res
,
794 .rpc_cred
= data
->owner
->so_cred
,
796 struct rpc_task_setup task_setup_data
= {
797 .rpc_client
= server
->client
,
799 .callback_ops
= &nfs4_open_confirm_ops
,
800 .callback_data
= data
,
801 .workqueue
= nfsiod_workqueue
,
802 .flags
= RPC_TASK_ASYNC
,
806 kref_get(&data
->kref
);
808 data
->rpc_status
= 0;
809 data
->timestamp
= jiffies
;
810 task
= rpc_run_task(&task_setup_data
);
812 return PTR_ERR(task
);
813 status
= nfs4_wait_for_completion_rpc_task(task
);
818 status
= data
->rpc_status
;
823 static void nfs4_open_prepare(struct rpc_task
*task
, void *calldata
)
825 struct nfs4_opendata
*data
= calldata
;
826 struct nfs4_state_owner
*sp
= data
->owner
;
828 if (nfs_wait_on_sequence(data
->o_arg
.seqid
, task
) != 0)
831 * Check if we still need to send an OPEN call, or if we can use
832 * a delegation instead.
834 if (data
->state
!= NULL
) {
835 struct nfs_delegation
*delegation
;
837 if (can_open_cached(data
->state
, data
->o_arg
.open_flags
& (FMODE_READ
|FMODE_WRITE
|O_EXCL
)))
840 delegation
= rcu_dereference(NFS_I(data
->state
->inode
)->delegation
);
841 if (delegation
!= NULL
&&
842 test_bit(NFS_DELEGATION_NEED_RECLAIM
, &delegation
->flags
) == 0) {
848 /* Update sequence id. */
849 data
->o_arg
.id
= sp
->so_owner_id
.id
;
850 data
->o_arg
.clientid
= sp
->so_client
->cl_clientid
;
851 if (data
->o_arg
.claim
== NFS4_OPEN_CLAIM_PREVIOUS
) {
852 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_NOATTR
];
853 nfs_copy_fh(&data
->o_res
.fh
, data
->o_arg
.fh
);
855 data
->timestamp
= jiffies
;
856 rpc_call_start(task
);
859 task
->tk_action
= NULL
;
863 static void nfs4_open_done(struct rpc_task
*task
, void *calldata
)
865 struct nfs4_opendata
*data
= calldata
;
867 data
->rpc_status
= task
->tk_status
;
868 if (RPC_ASSASSINATED(task
))
870 if (task
->tk_status
== 0) {
871 switch (data
->o_res
.f_attr
->mode
& S_IFMT
) {
875 data
->rpc_status
= -ELOOP
;
878 data
->rpc_status
= -EISDIR
;
881 data
->rpc_status
= -ENOTDIR
;
883 renew_lease(data
->o_res
.server
, data
->timestamp
);
884 if (!(data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
))
885 nfs_confirm_seqid(&data
->owner
->so_seqid
, 0);
890 static void nfs4_open_release(void *calldata
)
892 struct nfs4_opendata
*data
= calldata
;
893 struct nfs4_state
*state
= NULL
;
895 /* If this request hasn't been cancelled, do nothing */
896 if (data
->cancelled
== 0)
898 /* In case of error, no cleanup! */
899 if (data
->rpc_status
!= 0 || !data
->rpc_done
)
901 /* In case we need an open_confirm, no cleanup! */
902 if (data
->o_res
.rflags
& NFS4_OPEN_RESULT_CONFIRM
)
904 state
= nfs4_opendata_to_nfs4_state(data
);
906 nfs4_close_state(&data
->path
, state
, data
->o_arg
.open_flags
);
908 nfs4_opendata_put(data
);
911 static const struct rpc_call_ops nfs4_open_ops
= {
912 .rpc_call_prepare
= nfs4_open_prepare
,
913 .rpc_call_done
= nfs4_open_done
,
914 .rpc_release
= nfs4_open_release
,
918 * Note: On error, nfs4_proc_open will free the struct nfs4_opendata
920 static int _nfs4_proc_open(struct nfs4_opendata
*data
)
922 struct inode
*dir
= data
->dir
->d_inode
;
923 struct nfs_server
*server
= NFS_SERVER(dir
);
924 struct nfs_openargs
*o_arg
= &data
->o_arg
;
925 struct nfs_openres
*o_res
= &data
->o_res
;
926 struct rpc_task
*task
;
927 struct rpc_message msg
= {
928 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN
],
931 .rpc_cred
= data
->owner
->so_cred
,
933 struct rpc_task_setup task_setup_data
= {
934 .rpc_client
= server
->client
,
936 .callback_ops
= &nfs4_open_ops
,
937 .callback_data
= data
,
938 .workqueue
= nfsiod_workqueue
,
939 .flags
= RPC_TASK_ASYNC
,
943 kref_get(&data
->kref
);
945 data
->rpc_status
= 0;
947 task
= rpc_run_task(&task_setup_data
);
949 return PTR_ERR(task
);
950 status
= nfs4_wait_for_completion_rpc_task(task
);
955 status
= data
->rpc_status
;
957 if (status
!= 0 || !data
->rpc_done
)
960 if (o_res
->fh
.size
== 0)
961 _nfs4_proc_lookup(dir
, o_arg
->name
, &o_res
->fh
, o_res
->f_attr
);
963 if (o_arg
->open_flags
& O_CREAT
) {
964 update_changeattr(dir
, &o_res
->cinfo
);
965 nfs_post_op_update_inode(dir
, o_res
->dir_attr
);
967 nfs_refresh_inode(dir
, o_res
->dir_attr
);
968 if(o_res
->rflags
& NFS4_OPEN_RESULT_CONFIRM
) {
969 status
= _nfs4_proc_open_confirm(data
);
973 if (!(o_res
->f_attr
->valid
& NFS_ATTR_FATTR
))
974 _nfs4_proc_getattr(server
, &o_res
->fh
, o_res
->f_attr
);
978 static int nfs4_recover_expired_lease(struct nfs_server
*server
)
980 struct nfs_client
*clp
= server
->nfs_client
;
984 ret
= nfs4_wait_clnt_recover(server
->client
, clp
);
987 if (!test_bit(NFS4CLNT_LEASE_EXPIRED
, &clp
->cl_state
) &&
988 !test_bit(NFS4CLNT_CHECK_LEASE
,&clp
->cl_state
))
990 nfs4_schedule_state_recovery(clp
);
997 * reclaim state on the server after a network partition.
998 * Assumes caller holds the appropriate lock
1000 static int _nfs4_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1002 struct nfs4_opendata
*opendata
;
1005 opendata
= nfs4_open_recoverdata_alloc(ctx
, state
);
1006 if (IS_ERR(opendata
))
1007 return PTR_ERR(opendata
);
1008 ret
= nfs4_open_recover(opendata
, state
);
1010 d_drop(ctx
->path
.dentry
);
1011 nfs4_opendata_put(opendata
);
1015 static inline int nfs4_do_open_expired(struct nfs_open_context
*ctx
, struct nfs4_state
*state
)
1017 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1018 struct nfs4_exception exception
= { };
1022 err
= _nfs4_open_expired(ctx
, state
);
1023 if (err
== -NFS4ERR_DELAY
)
1024 nfs4_handle_exception(server
, err
, &exception
);
1025 } while (exception
.retry
);
1029 static int nfs4_open_expired(struct nfs4_state_owner
*sp
, struct nfs4_state
*state
)
1031 struct nfs_open_context
*ctx
;
1034 ctx
= nfs4_state_find_open_context(state
);
1036 return PTR_ERR(ctx
);
1037 ret
= nfs4_do_open_expired(ctx
, state
);
1038 put_nfs_open_context(ctx
);
1043 * on an EXCLUSIVE create, the server should send back a bitmask with FATTR4-*
1044 * fields corresponding to attributes that were used to store the verifier.
1045 * Make sure we clobber those fields in the later setattr call
1047 static inline void nfs4_exclusive_attrset(struct nfs4_opendata
*opendata
, struct iattr
*sattr
)
1049 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_ACCESS
) &&
1050 !(sattr
->ia_valid
& ATTR_ATIME_SET
))
1051 sattr
->ia_valid
|= ATTR_ATIME
;
1053 if ((opendata
->o_res
.attrset
[1] & FATTR4_WORD1_TIME_MODIFY
) &&
1054 !(sattr
->ia_valid
& ATTR_MTIME_SET
))
1055 sattr
->ia_valid
|= ATTR_MTIME
;
1059 * Returns a referenced nfs4_state
1061 static int _nfs4_do_open(struct inode
*dir
, struct path
*path
, int flags
, struct iattr
*sattr
, struct rpc_cred
*cred
, struct nfs4_state
**res
)
1063 struct nfs4_state_owner
*sp
;
1064 struct nfs4_state
*state
= NULL
;
1065 struct nfs_server
*server
= NFS_SERVER(dir
);
1066 struct nfs_client
*clp
= server
->nfs_client
;
1067 struct nfs4_opendata
*opendata
;
1070 /* Protect against reboot recovery conflicts */
1072 if (!(sp
= nfs4_get_state_owner(server
, cred
))) {
1073 dprintk("nfs4_do_open: nfs4_get_state_owner failed!\n");
1076 status
= nfs4_recover_expired_lease(server
);
1078 goto err_put_state_owner
;
1079 if (path
->dentry
->d_inode
!= NULL
)
1080 nfs4_return_incompatible_delegation(path
->dentry
->d_inode
, flags
& (FMODE_READ
|FMODE_WRITE
));
1081 down_read(&clp
->cl_sem
);
1083 opendata
= nfs4_opendata_alloc(path
, sp
, flags
, sattr
);
1084 if (opendata
== NULL
)
1085 goto err_release_rwsem
;
1087 if (path
->dentry
->d_inode
!= NULL
)
1088 opendata
->state
= nfs4_get_open_state(path
->dentry
->d_inode
, sp
);
1090 status
= _nfs4_proc_open(opendata
);
1092 goto err_opendata_put
;
1094 if (opendata
->o_arg
.open_flags
& O_EXCL
)
1095 nfs4_exclusive_attrset(opendata
, sattr
);
1097 state
= nfs4_opendata_to_nfs4_state(opendata
);
1098 status
= PTR_ERR(state
);
1100 goto err_opendata_put
;
1101 nfs4_opendata_put(opendata
);
1102 nfs4_put_state_owner(sp
);
1103 up_read(&clp
->cl_sem
);
1107 nfs4_opendata_put(opendata
);
1109 up_read(&clp
->cl_sem
);
1110 err_put_state_owner
:
1111 nfs4_put_state_owner(sp
);
1118 static struct nfs4_state
*nfs4_do_open(struct inode
*dir
, struct path
*path
, int flags
, struct iattr
*sattr
, struct rpc_cred
*cred
)
1120 struct nfs4_exception exception
= { };
1121 struct nfs4_state
*res
;
1125 status
= _nfs4_do_open(dir
, path
, flags
, sattr
, cred
, &res
);
1128 /* NOTE: BAD_SEQID means the server and client disagree about the
1129 * book-keeping w.r.t. state-changing operations
1130 * (OPEN/CLOSE/LOCK/LOCKU...)
1131 * It is actually a sign of a bug on the client or on the server.
1133 * If we receive a BAD_SEQID error in the particular case of
1134 * doing an OPEN, we assume that nfs_increment_open_seqid() will
1135 * have unhashed the old state_owner for us, and that we can
1136 * therefore safely retry using a new one. We should still warn
1137 * the user though...
1139 if (status
== -NFS4ERR_BAD_SEQID
) {
1140 printk(KERN_WARNING
"NFS: v4 server %s "
1141 " returned a bad sequence-id error!\n",
1142 NFS_SERVER(dir
)->nfs_client
->cl_hostname
);
1143 exception
.retry
= 1;
1147 * BAD_STATEID on OPEN means that the server cancelled our
1148 * state before it received the OPEN_CONFIRM.
1149 * Recover by retrying the request as per the discussion
1150 * on Page 181 of RFC3530.
1152 if (status
== -NFS4ERR_BAD_STATEID
) {
1153 exception
.retry
= 1;
1156 if (status
== -EAGAIN
) {
1157 /* We must have found a delegation */
1158 exception
.retry
= 1;
1161 res
= ERR_PTR(nfs4_handle_exception(NFS_SERVER(dir
),
1162 status
, &exception
));
1163 } while (exception
.retry
);
1167 static int _nfs4_do_setattr(struct inode
*inode
, struct rpc_cred
*cred
,
1168 struct nfs_fattr
*fattr
, struct iattr
*sattr
,
1169 struct nfs4_state
*state
)
1171 struct nfs_server
*server
= NFS_SERVER(inode
);
1172 struct nfs_setattrargs arg
= {
1173 .fh
= NFS_FH(inode
),
1176 .bitmask
= server
->attr_bitmask
,
1178 struct nfs_setattrres res
= {
1182 struct rpc_message msg
= {
1183 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETATTR
],
1188 unsigned long timestamp
= jiffies
;
1191 nfs_fattr_init(fattr
);
1193 if (nfs4_copy_delegation_stateid(&arg
.stateid
, inode
)) {
1194 /* Use that stateid */
1195 } else if (state
!= NULL
) {
1196 nfs4_copy_stateid(&arg
.stateid
, state
, current
->files
);
1198 memcpy(&arg
.stateid
, &zero_stateid
, sizeof(arg
.stateid
));
1200 status
= rpc_call_sync(server
->client
, &msg
, 0);
1201 if (status
== 0 && state
!= NULL
)
1202 renew_lease(server
, timestamp
);
1206 static int nfs4_do_setattr(struct inode
*inode
, struct rpc_cred
*cred
,
1207 struct nfs_fattr
*fattr
, struct iattr
*sattr
,
1208 struct nfs4_state
*state
)
1210 struct nfs_server
*server
= NFS_SERVER(inode
);
1211 struct nfs4_exception exception
= { };
1214 err
= nfs4_handle_exception(server
,
1215 _nfs4_do_setattr(inode
, cred
, fattr
, sattr
, state
),
1217 } while (exception
.retry
);
1221 struct nfs4_closedata
{
1223 struct inode
*inode
;
1224 struct nfs4_state
*state
;
1225 struct nfs_closeargs arg
;
1226 struct nfs_closeres res
;
1227 struct nfs_fattr fattr
;
1228 unsigned long timestamp
;
1231 static void nfs4_free_closedata(void *data
)
1233 struct nfs4_closedata
*calldata
= data
;
1234 struct nfs4_state_owner
*sp
= calldata
->state
->owner
;
1236 nfs4_put_open_state(calldata
->state
);
1237 nfs_free_seqid(calldata
->arg
.seqid
);
1238 nfs4_put_state_owner(sp
);
1239 path_put(&calldata
->path
);
1243 static void nfs4_close_done(struct rpc_task
*task
, void *data
)
1245 struct nfs4_closedata
*calldata
= data
;
1246 struct nfs4_state
*state
= calldata
->state
;
1247 struct nfs_server
*server
= NFS_SERVER(calldata
->inode
);
1249 if (RPC_ASSASSINATED(task
))
1251 /* hmm. we are done with the inode, and in the process of freeing
1252 * the state_owner. we keep this around to process errors
1254 switch (task
->tk_status
) {
1256 nfs_set_open_stateid(state
, &calldata
->res
.stateid
, 0);
1257 renew_lease(server
, calldata
->timestamp
);
1259 case -NFS4ERR_STALE_STATEID
:
1260 case -NFS4ERR_EXPIRED
:
1263 if (nfs4_async_handle_error(task
, server
) == -EAGAIN
) {
1264 rpc_restart_call(task
);
1268 nfs_refresh_inode(calldata
->inode
, calldata
->res
.fattr
);
1271 static void nfs4_close_prepare(struct rpc_task
*task
, void *data
)
1273 struct nfs4_closedata
*calldata
= data
;
1274 struct nfs4_state
*state
= calldata
->state
;
1275 int clear_rd
, clear_wr
, clear_rdwr
;
1277 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
1280 clear_rd
= clear_wr
= clear_rdwr
= 0;
1281 spin_lock(&state
->owner
->so_lock
);
1282 /* Calculate the change in open mode */
1283 if (state
->n_rdwr
== 0) {
1284 if (state
->n_rdonly
== 0) {
1285 clear_rd
|= test_and_clear_bit(NFS_O_RDONLY_STATE
, &state
->flags
);
1286 clear_rdwr
|= test_and_clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1288 if (state
->n_wronly
== 0) {
1289 clear_wr
|= test_and_clear_bit(NFS_O_WRONLY_STATE
, &state
->flags
);
1290 clear_rdwr
|= test_and_clear_bit(NFS_O_RDWR_STATE
, &state
->flags
);
1293 spin_unlock(&state
->owner
->so_lock
);
1294 if (!clear_rd
&& !clear_wr
&& !clear_rdwr
) {
1295 /* Note: exit _without_ calling nfs4_close_done */
1296 task
->tk_action
= NULL
;
1299 nfs_fattr_init(calldata
->res
.fattr
);
1300 if (test_bit(NFS_O_RDONLY_STATE
, &state
->flags
) != 0) {
1301 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_DOWNGRADE
];
1302 calldata
->arg
.open_flags
= FMODE_READ
;
1303 } else if (test_bit(NFS_O_WRONLY_STATE
, &state
->flags
) != 0) {
1304 task
->tk_msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_OPEN_DOWNGRADE
];
1305 calldata
->arg
.open_flags
= FMODE_WRITE
;
1307 calldata
->timestamp
= jiffies
;
1308 rpc_call_start(task
);
1311 static const struct rpc_call_ops nfs4_close_ops
= {
1312 .rpc_call_prepare
= nfs4_close_prepare
,
1313 .rpc_call_done
= nfs4_close_done
,
1314 .rpc_release
= nfs4_free_closedata
,
1318 * It is possible for data to be read/written from a mem-mapped file
1319 * after the sys_close call (which hits the vfs layer as a flush).
1320 * This means that we can't safely call nfsv4 close on a file until
1321 * the inode is cleared. This in turn means that we are not good
1322 * NFSv4 citizens - we do not indicate to the server to update the file's
1323 * share state even when we are done with one of the three share
1324 * stateid's in the inode.
1326 * NOTE: Caller must be holding the sp->so_owner semaphore!
1328 int nfs4_do_close(struct path
*path
, struct nfs4_state
*state
, int wait
)
1330 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
1331 struct nfs4_closedata
*calldata
;
1332 struct nfs4_state_owner
*sp
= state
->owner
;
1333 struct rpc_task
*task
;
1334 struct rpc_message msg
= {
1335 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CLOSE
],
1336 .rpc_cred
= state
->owner
->so_cred
,
1338 struct rpc_task_setup task_setup_data
= {
1339 .rpc_client
= server
->client
,
1340 .rpc_message
= &msg
,
1341 .callback_ops
= &nfs4_close_ops
,
1342 .workqueue
= nfsiod_workqueue
,
1343 .flags
= RPC_TASK_ASYNC
,
1345 int status
= -ENOMEM
;
1347 calldata
= kmalloc(sizeof(*calldata
), GFP_KERNEL
);
1348 if (calldata
== NULL
)
1350 calldata
->inode
= state
->inode
;
1351 calldata
->state
= state
;
1352 calldata
->arg
.fh
= NFS_FH(state
->inode
);
1353 calldata
->arg
.stateid
= &state
->open_stateid
;
1354 /* Serialization for the sequence id */
1355 calldata
->arg
.seqid
= nfs_alloc_seqid(&state
->owner
->so_seqid
);
1356 if (calldata
->arg
.seqid
== NULL
)
1357 goto out_free_calldata
;
1358 calldata
->arg
.bitmask
= server
->attr_bitmask
;
1359 calldata
->res
.fattr
= &calldata
->fattr
;
1360 calldata
->res
.seqid
= calldata
->arg
.seqid
;
1361 calldata
->res
.server
= server
;
1362 calldata
->path
.mnt
= mntget(path
->mnt
);
1363 calldata
->path
.dentry
= dget(path
->dentry
);
1365 msg
.rpc_argp
= &calldata
->arg
,
1366 msg
.rpc_resp
= &calldata
->res
,
1367 task_setup_data
.callback_data
= calldata
;
1368 task
= rpc_run_task(&task_setup_data
);
1370 return PTR_ERR(task
);
1373 status
= rpc_wait_for_completion_task(task
);
1379 nfs4_put_open_state(state
);
1380 nfs4_put_state_owner(sp
);
1384 static int nfs4_intent_set_file(struct nameidata
*nd
, struct path
*path
, struct nfs4_state
*state
)
1389 /* If the open_intent is for execute, we have an extra check to make */
1390 if (nd
->intent
.open
.flags
& FMODE_EXEC
) {
1391 ret
= nfs_may_open(state
->inode
,
1392 state
->owner
->so_cred
,
1393 nd
->intent
.open
.flags
);
1397 filp
= lookup_instantiate_filp(nd
, path
->dentry
, NULL
);
1398 if (!IS_ERR(filp
)) {
1399 struct nfs_open_context
*ctx
;
1400 ctx
= nfs_file_open_context(filp
);
1404 ret
= PTR_ERR(filp
);
1406 nfs4_close_sync(path
, state
, nd
->intent
.open
.flags
);
1411 nfs4_atomic_open(struct inode
*dir
, struct dentry
*dentry
, struct nameidata
*nd
)
1413 struct path path
= {
1414 .mnt
= nd
->path
.mnt
,
1417 struct dentry
*parent
;
1419 struct rpc_cred
*cred
;
1420 struct nfs4_state
*state
;
1423 if (nd
->flags
& LOOKUP_CREATE
) {
1424 attr
.ia_mode
= nd
->intent
.open
.create_mode
;
1425 attr
.ia_valid
= ATTR_MODE
;
1426 if (!IS_POSIXACL(dir
))
1427 attr
.ia_mode
&= ~current
->fs
->umask
;
1430 BUG_ON(nd
->intent
.open
.flags
& O_CREAT
);
1433 cred
= rpc_lookup_cred();
1435 return (struct dentry
*)cred
;
1436 parent
= dentry
->d_parent
;
1437 /* Protect against concurrent sillydeletes */
1438 nfs_block_sillyrename(parent
);
1439 state
= nfs4_do_open(dir
, &path
, nd
->intent
.open
.flags
, &attr
, cred
);
1441 if (IS_ERR(state
)) {
1442 if (PTR_ERR(state
) == -ENOENT
) {
1443 d_add(dentry
, NULL
);
1444 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
1446 nfs_unblock_sillyrename(parent
);
1447 return (struct dentry
*)state
;
1449 res
= d_add_unique(dentry
, igrab(state
->inode
));
1452 nfs_set_verifier(path
.dentry
, nfs_save_change_attribute(dir
));
1453 nfs_unblock_sillyrename(parent
);
1454 nfs4_intent_set_file(nd
, &path
, state
);
1459 nfs4_open_revalidate(struct inode
*dir
, struct dentry
*dentry
, int openflags
, struct nameidata
*nd
)
1461 struct path path
= {
1462 .mnt
= nd
->path
.mnt
,
1465 struct rpc_cred
*cred
;
1466 struct nfs4_state
*state
;
1468 cred
= rpc_lookup_cred();
1470 return PTR_ERR(cred
);
1471 state
= nfs4_do_open(dir
, &path
, openflags
, NULL
, cred
);
1473 if (IS_ERR(state
)) {
1474 switch (PTR_ERR(state
)) {
1480 lookup_instantiate_filp(nd
, (struct dentry
*)state
, NULL
);
1486 if (state
->inode
== dentry
->d_inode
) {
1487 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
1488 nfs4_intent_set_file(nd
, &path
, state
);
1491 nfs4_close_sync(&path
, state
, openflags
);
1498 static int _nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1500 struct nfs4_server_caps_res res
= {};
1501 struct rpc_message msg
= {
1502 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SERVER_CAPS
],
1503 .rpc_argp
= fhandle
,
1508 status
= rpc_call_sync(server
->client
, &msg
, 0);
1510 memcpy(server
->attr_bitmask
, res
.attr_bitmask
, sizeof(server
->attr_bitmask
));
1511 if (res
.attr_bitmask
[0] & FATTR4_WORD0_ACL
)
1512 server
->caps
|= NFS_CAP_ACLS
;
1513 if (res
.has_links
!= 0)
1514 server
->caps
|= NFS_CAP_HARDLINKS
;
1515 if (res
.has_symlinks
!= 0)
1516 server
->caps
|= NFS_CAP_SYMLINKS
;
1517 server
->acl_bitmask
= res
.acl_bitmask
;
1522 int nfs4_server_capabilities(struct nfs_server
*server
, struct nfs_fh
*fhandle
)
1524 struct nfs4_exception exception
= { };
1527 err
= nfs4_handle_exception(server
,
1528 _nfs4_server_capabilities(server
, fhandle
),
1530 } while (exception
.retry
);
1534 static int _nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1535 struct nfs_fsinfo
*info
)
1537 struct nfs4_lookup_root_arg args
= {
1538 .bitmask
= nfs4_fattr_bitmap
,
1540 struct nfs4_lookup_res res
= {
1542 .fattr
= info
->fattr
,
1545 struct rpc_message msg
= {
1546 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP_ROOT
],
1550 nfs_fattr_init(info
->fattr
);
1551 return rpc_call_sync(server
->client
, &msg
, 0);
1554 static int nfs4_lookup_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1555 struct nfs_fsinfo
*info
)
1557 struct nfs4_exception exception
= { };
1560 err
= nfs4_handle_exception(server
,
1561 _nfs4_lookup_root(server
, fhandle
, info
),
1563 } while (exception
.retry
);
1568 * get the file handle for the "/" directory on the server
1570 static int nfs4_proc_get_root(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
1571 struct nfs_fsinfo
*info
)
1575 status
= nfs4_lookup_root(server
, fhandle
, info
);
1577 status
= nfs4_server_capabilities(server
, fhandle
);
1579 status
= nfs4_do_fsinfo(server
, fhandle
, info
);
1580 return nfs4_map_errors(status
);
1584 * Get locations and (maybe) other attributes of a referral.
1585 * Note that we'll actually follow the referral later when
1586 * we detect fsid mismatch in inode revalidation
1588 static int nfs4_get_referral(struct inode
*dir
, const struct qstr
*name
, struct nfs_fattr
*fattr
, struct nfs_fh
*fhandle
)
1590 int status
= -ENOMEM
;
1591 struct page
*page
= NULL
;
1592 struct nfs4_fs_locations
*locations
= NULL
;
1594 page
= alloc_page(GFP_KERNEL
);
1597 locations
= kmalloc(sizeof(struct nfs4_fs_locations
), GFP_KERNEL
);
1598 if (locations
== NULL
)
1601 status
= nfs4_proc_fs_locations(dir
, name
, locations
, page
);
1604 /* Make sure server returned a different fsid for the referral */
1605 if (nfs_fsid_equal(&NFS_SERVER(dir
)->fsid
, &locations
->fattr
.fsid
)) {
1606 dprintk("%s: server did not return a different fsid for a referral at %s\n", __func__
, name
->name
);
1611 memcpy(fattr
, &locations
->fattr
, sizeof(struct nfs_fattr
));
1612 fattr
->valid
|= NFS_ATTR_FATTR_V4_REFERRAL
;
1614 fattr
->mode
= S_IFDIR
;
1615 memset(fhandle
, 0, sizeof(struct nfs_fh
));
1624 static int _nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1626 struct nfs4_getattr_arg args
= {
1628 .bitmask
= server
->attr_bitmask
,
1630 struct nfs4_getattr_res res
= {
1634 struct rpc_message msg
= {
1635 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETATTR
],
1640 nfs_fattr_init(fattr
);
1641 return rpc_call_sync(server
->client
, &msg
, 0);
1644 static int nfs4_proc_getattr(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1646 struct nfs4_exception exception
= { };
1649 err
= nfs4_handle_exception(server
,
1650 _nfs4_proc_getattr(server
, fhandle
, fattr
),
1652 } while (exception
.retry
);
1657 * The file is not closed if it is opened due to the a request to change
1658 * the size of the file. The open call will not be needed once the
1659 * VFS layer lookup-intents are implemented.
1661 * Close is called when the inode is destroyed.
1662 * If we haven't opened the file for O_WRONLY, we
1663 * need to in the size_change case to obtain a stateid.
1666 * Because OPEN is always done by name in nfsv4, it is
1667 * possible that we opened a different file by the same
1668 * name. We can recognize this race condition, but we
1669 * can't do anything about it besides returning an error.
1671 * This will be fixed with VFS changes (lookup-intent).
1674 nfs4_proc_setattr(struct dentry
*dentry
, struct nfs_fattr
*fattr
,
1675 struct iattr
*sattr
)
1677 struct inode
*inode
= dentry
->d_inode
;
1678 struct rpc_cred
*cred
= NULL
;
1679 struct nfs4_state
*state
= NULL
;
1682 nfs_fattr_init(fattr
);
1684 /* Search for an existing open(O_WRITE) file */
1685 if (sattr
->ia_valid
& ATTR_FILE
) {
1686 struct nfs_open_context
*ctx
;
1688 ctx
= nfs_file_open_context(sattr
->ia_file
);
1695 status
= nfs4_do_setattr(inode
, cred
, fattr
, sattr
, state
);
1697 nfs_setattr_update_inode(inode
, sattr
);
1701 static int _nfs4_proc_lookupfh(struct nfs_server
*server
, const struct nfs_fh
*dirfh
,
1702 const struct qstr
*name
, struct nfs_fh
*fhandle
,
1703 struct nfs_fattr
*fattr
)
1706 struct nfs4_lookup_arg args
= {
1707 .bitmask
= server
->attr_bitmask
,
1711 struct nfs4_lookup_res res
= {
1716 struct rpc_message msg
= {
1717 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOOKUP
],
1722 nfs_fattr_init(fattr
);
1724 dprintk("NFS call lookupfh %s\n", name
->name
);
1725 status
= rpc_call_sync(server
->client
, &msg
, 0);
1726 dprintk("NFS reply lookupfh: %d\n", status
);
1730 static int nfs4_proc_lookupfh(struct nfs_server
*server
, struct nfs_fh
*dirfh
,
1731 struct qstr
*name
, struct nfs_fh
*fhandle
,
1732 struct nfs_fattr
*fattr
)
1734 struct nfs4_exception exception
= { };
1737 err
= _nfs4_proc_lookupfh(server
, dirfh
, name
, fhandle
, fattr
);
1739 if (err
== -NFS4ERR_MOVED
) {
1743 err
= nfs4_handle_exception(server
, err
, &exception
);
1744 } while (exception
.retry
);
1748 static int _nfs4_proc_lookup(struct inode
*dir
, const struct qstr
*name
,
1749 struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1753 dprintk("NFS call lookup %s\n", name
->name
);
1754 status
= _nfs4_proc_lookupfh(NFS_SERVER(dir
), NFS_FH(dir
), name
, fhandle
, fattr
);
1755 if (status
== -NFS4ERR_MOVED
)
1756 status
= nfs4_get_referral(dir
, name
, fattr
, fhandle
);
1757 dprintk("NFS reply lookup: %d\n", status
);
1761 static int nfs4_proc_lookup(struct inode
*dir
, struct qstr
*name
, struct nfs_fh
*fhandle
, struct nfs_fattr
*fattr
)
1763 struct nfs4_exception exception
= { };
1766 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1767 _nfs4_proc_lookup(dir
, name
, fhandle
, fattr
),
1769 } while (exception
.retry
);
1773 static int _nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
1775 struct nfs_server
*server
= NFS_SERVER(inode
);
1776 struct nfs_fattr fattr
;
1777 struct nfs4_accessargs args
= {
1778 .fh
= NFS_FH(inode
),
1779 .bitmask
= server
->attr_bitmask
,
1781 struct nfs4_accessres res
= {
1785 struct rpc_message msg
= {
1786 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_ACCESS
],
1789 .rpc_cred
= entry
->cred
,
1791 int mode
= entry
->mask
;
1795 * Determine which access bits we want to ask for...
1797 if (mode
& MAY_READ
)
1798 args
.access
|= NFS4_ACCESS_READ
;
1799 if (S_ISDIR(inode
->i_mode
)) {
1800 if (mode
& MAY_WRITE
)
1801 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
;
1802 if (mode
& MAY_EXEC
)
1803 args
.access
|= NFS4_ACCESS_LOOKUP
;
1805 if (mode
& MAY_WRITE
)
1806 args
.access
|= NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
;
1807 if (mode
& MAY_EXEC
)
1808 args
.access
|= NFS4_ACCESS_EXECUTE
;
1810 nfs_fattr_init(&fattr
);
1811 status
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
1814 if (res
.access
& NFS4_ACCESS_READ
)
1815 entry
->mask
|= MAY_READ
;
1816 if (res
.access
& (NFS4_ACCESS_MODIFY
| NFS4_ACCESS_EXTEND
| NFS4_ACCESS_DELETE
))
1817 entry
->mask
|= MAY_WRITE
;
1818 if (res
.access
& (NFS4_ACCESS_LOOKUP
|NFS4_ACCESS_EXECUTE
))
1819 entry
->mask
|= MAY_EXEC
;
1820 nfs_refresh_inode(inode
, &fattr
);
1825 static int nfs4_proc_access(struct inode
*inode
, struct nfs_access_entry
*entry
)
1827 struct nfs4_exception exception
= { };
1830 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1831 _nfs4_proc_access(inode
, entry
),
1833 } while (exception
.retry
);
1838 * TODO: For the time being, we don't try to get any attributes
1839 * along with any of the zero-copy operations READ, READDIR,
1842 * In the case of the first three, we want to put the GETATTR
1843 * after the read-type operation -- this is because it is hard
1844 * to predict the length of a GETATTR response in v4, and thus
1845 * align the READ data correctly. This means that the GETATTR
1846 * may end up partially falling into the page cache, and we should
1847 * shift it into the 'tail' of the xdr_buf before processing.
1848 * To do this efficiently, we need to know the total length
1849 * of data received, which doesn't seem to be available outside
1852 * In the case of WRITE, we also want to put the GETATTR after
1853 * the operation -- in this case because we want to make sure
1854 * we get the post-operation mtime and size. This means that
1855 * we can't use xdr_encode_pages() as written: we need a variant
1856 * of it which would leave room in the 'tail' iovec.
1858 * Both of these changes to the XDR layer would in fact be quite
1859 * minor, but I decided to leave them for a subsequent patch.
1861 static int _nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
1862 unsigned int pgbase
, unsigned int pglen
)
1864 struct nfs4_readlink args
= {
1865 .fh
= NFS_FH(inode
),
1870 struct rpc_message msg
= {
1871 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READLINK
],
1876 return rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
1879 static int nfs4_proc_readlink(struct inode
*inode
, struct page
*page
,
1880 unsigned int pgbase
, unsigned int pglen
)
1882 struct nfs4_exception exception
= { };
1885 err
= nfs4_handle_exception(NFS_SERVER(inode
),
1886 _nfs4_proc_readlink(inode
, page
, pgbase
, pglen
),
1888 } while (exception
.retry
);
1894 * We will need to arrange for the VFS layer to provide an atomic open.
1895 * Until then, this create/open method is prone to inefficiency and race
1896 * conditions due to the lookup, create, and open VFS calls from sys_open()
1897 * placed on the wire.
1899 * Given the above sorry state of affairs, I'm simply sending an OPEN.
1900 * The file will be opened again in the subsequent VFS open call
1901 * (nfs4_proc_file_open).
1903 * The open for read will just hang around to be used by any process that
1904 * opens the file O_RDONLY. This will all be resolved with the VFS changes.
1908 nfs4_proc_create(struct inode
*dir
, struct dentry
*dentry
, struct iattr
*sattr
,
1909 int flags
, struct nameidata
*nd
)
1911 struct path path
= {
1912 .mnt
= nd
->path
.mnt
,
1915 struct nfs4_state
*state
;
1916 struct rpc_cred
*cred
;
1919 cred
= rpc_lookup_cred();
1921 status
= PTR_ERR(cred
);
1924 state
= nfs4_do_open(dir
, &path
, flags
, sattr
, cred
);
1926 if (IS_ERR(state
)) {
1927 status
= PTR_ERR(state
);
1930 d_add(dentry
, igrab(state
->inode
));
1931 nfs_set_verifier(dentry
, nfs_save_change_attribute(dir
));
1932 if (flags
& O_EXCL
) {
1933 struct nfs_fattr fattr
;
1934 status
= nfs4_do_setattr(state
->inode
, cred
, &fattr
, sattr
, state
);
1936 nfs_setattr_update_inode(state
->inode
, sattr
);
1937 nfs_post_op_update_inode(state
->inode
, &fattr
);
1939 if (status
== 0 && (nd
->flags
& LOOKUP_OPEN
) != 0)
1940 status
= nfs4_intent_set_file(nd
, &path
, state
);
1942 nfs4_close_sync(&path
, state
, flags
);
1949 static int _nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
1951 struct nfs_server
*server
= NFS_SERVER(dir
);
1952 struct nfs_removeargs args
= {
1954 .name
.len
= name
->len
,
1955 .name
.name
= name
->name
,
1956 .bitmask
= server
->attr_bitmask
,
1958 struct nfs_removeres res
= {
1961 struct rpc_message msg
= {
1962 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
],
1968 nfs_fattr_init(&res
.dir_attr
);
1969 status
= rpc_call_sync(server
->client
, &msg
, 0);
1971 update_changeattr(dir
, &res
.cinfo
);
1972 nfs_post_op_update_inode(dir
, &res
.dir_attr
);
1977 static int nfs4_proc_remove(struct inode
*dir
, struct qstr
*name
)
1979 struct nfs4_exception exception
= { };
1982 err
= nfs4_handle_exception(NFS_SERVER(dir
),
1983 _nfs4_proc_remove(dir
, name
),
1985 } while (exception
.retry
);
1989 static void nfs4_proc_unlink_setup(struct rpc_message
*msg
, struct inode
*dir
)
1991 struct nfs_server
*server
= NFS_SERVER(dir
);
1992 struct nfs_removeargs
*args
= msg
->rpc_argp
;
1993 struct nfs_removeres
*res
= msg
->rpc_resp
;
1995 args
->bitmask
= server
->attr_bitmask
;
1996 res
->server
= server
;
1997 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_REMOVE
];
2000 static int nfs4_proc_unlink_done(struct rpc_task
*task
, struct inode
*dir
)
2002 struct nfs_removeres
*res
= task
->tk_msg
.rpc_resp
;
2004 if (nfs4_async_handle_error(task
, res
->server
) == -EAGAIN
)
2006 update_changeattr(dir
, &res
->cinfo
);
2007 nfs_post_op_update_inode(dir
, &res
->dir_attr
);
2011 static int _nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2012 struct inode
*new_dir
, struct qstr
*new_name
)
2014 struct nfs_server
*server
= NFS_SERVER(old_dir
);
2015 struct nfs4_rename_arg arg
= {
2016 .old_dir
= NFS_FH(old_dir
),
2017 .new_dir
= NFS_FH(new_dir
),
2018 .old_name
= old_name
,
2019 .new_name
= new_name
,
2020 .bitmask
= server
->attr_bitmask
,
2022 struct nfs_fattr old_fattr
, new_fattr
;
2023 struct nfs4_rename_res res
= {
2025 .old_fattr
= &old_fattr
,
2026 .new_fattr
= &new_fattr
,
2028 struct rpc_message msg
= {
2029 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENAME
],
2035 nfs_fattr_init(res
.old_fattr
);
2036 nfs_fattr_init(res
.new_fattr
);
2037 status
= rpc_call_sync(server
->client
, &msg
, 0);
2040 update_changeattr(old_dir
, &res
.old_cinfo
);
2041 nfs_post_op_update_inode(old_dir
, res
.old_fattr
);
2042 update_changeattr(new_dir
, &res
.new_cinfo
);
2043 nfs_post_op_update_inode(new_dir
, res
.new_fattr
);
2048 static int nfs4_proc_rename(struct inode
*old_dir
, struct qstr
*old_name
,
2049 struct inode
*new_dir
, struct qstr
*new_name
)
2051 struct nfs4_exception exception
= { };
2054 err
= nfs4_handle_exception(NFS_SERVER(old_dir
),
2055 _nfs4_proc_rename(old_dir
, old_name
,
2058 } while (exception
.retry
);
2062 static int _nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2064 struct nfs_server
*server
= NFS_SERVER(inode
);
2065 struct nfs4_link_arg arg
= {
2066 .fh
= NFS_FH(inode
),
2067 .dir_fh
= NFS_FH(dir
),
2069 .bitmask
= server
->attr_bitmask
,
2071 struct nfs_fattr fattr
, dir_attr
;
2072 struct nfs4_link_res res
= {
2075 .dir_attr
= &dir_attr
,
2077 struct rpc_message msg
= {
2078 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LINK
],
2084 nfs_fattr_init(res
.fattr
);
2085 nfs_fattr_init(res
.dir_attr
);
2086 status
= rpc_call_sync(server
->client
, &msg
, 0);
2088 update_changeattr(dir
, &res
.cinfo
);
2089 nfs_post_op_update_inode(dir
, res
.dir_attr
);
2090 nfs_post_op_update_inode(inode
, res
.fattr
);
2096 static int nfs4_proc_link(struct inode
*inode
, struct inode
*dir
, struct qstr
*name
)
2098 struct nfs4_exception exception
= { };
2101 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2102 _nfs4_proc_link(inode
, dir
, name
),
2104 } while (exception
.retry
);
2108 struct nfs4_createdata
{
2109 struct rpc_message msg
;
2110 struct nfs4_create_arg arg
;
2111 struct nfs4_create_res res
;
2113 struct nfs_fattr fattr
;
2114 struct nfs_fattr dir_fattr
;
2117 static struct nfs4_createdata
*nfs4_alloc_createdata(struct inode
*dir
,
2118 struct qstr
*name
, struct iattr
*sattr
, u32 ftype
)
2120 struct nfs4_createdata
*data
;
2122 data
= kzalloc(sizeof(*data
), GFP_KERNEL
);
2124 struct nfs_server
*server
= NFS_SERVER(dir
);
2126 data
->msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_CREATE
];
2127 data
->msg
.rpc_argp
= &data
->arg
;
2128 data
->msg
.rpc_resp
= &data
->res
;
2129 data
->arg
.dir_fh
= NFS_FH(dir
);
2130 data
->arg
.server
= server
;
2131 data
->arg
.name
= name
;
2132 data
->arg
.attrs
= sattr
;
2133 data
->arg
.ftype
= ftype
;
2134 data
->arg
.bitmask
= server
->attr_bitmask
;
2135 data
->res
.server
= server
;
2136 data
->res
.fh
= &data
->fh
;
2137 data
->res
.fattr
= &data
->fattr
;
2138 data
->res
.dir_fattr
= &data
->dir_fattr
;
2139 nfs_fattr_init(data
->res
.fattr
);
2140 nfs_fattr_init(data
->res
.dir_fattr
);
2145 static int nfs4_do_create(struct inode
*dir
, struct dentry
*dentry
, struct nfs4_createdata
*data
)
2147 int status
= rpc_call_sync(NFS_CLIENT(dir
), &data
->msg
, 0);
2149 update_changeattr(dir
, &data
->res
.dir_cinfo
);
2150 nfs_post_op_update_inode(dir
, data
->res
.dir_fattr
);
2151 status
= nfs_instantiate(dentry
, data
->res
.fh
, data
->res
.fattr
);
2156 static void nfs4_free_createdata(struct nfs4_createdata
*data
)
2161 static int _nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2162 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2164 struct nfs4_createdata
*data
;
2165 int status
= -ENAMETOOLONG
;
2167 if (len
> NFS4_MAXPATHLEN
)
2171 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4LNK
);
2175 data
->msg
.rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SYMLINK
];
2176 data
->arg
.u
.symlink
.pages
= &page
;
2177 data
->arg
.u
.symlink
.len
= len
;
2179 status
= nfs4_do_create(dir
, dentry
, data
);
2181 nfs4_free_createdata(data
);
2186 static int nfs4_proc_symlink(struct inode
*dir
, struct dentry
*dentry
,
2187 struct page
*page
, unsigned int len
, struct iattr
*sattr
)
2189 struct nfs4_exception exception
= { };
2192 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2193 _nfs4_proc_symlink(dir
, dentry
, page
,
2196 } while (exception
.retry
);
2200 static int _nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2201 struct iattr
*sattr
)
2203 struct nfs4_createdata
*data
;
2204 int status
= -ENOMEM
;
2206 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4DIR
);
2210 status
= nfs4_do_create(dir
, dentry
, data
);
2212 nfs4_free_createdata(data
);
2217 static int nfs4_proc_mkdir(struct inode
*dir
, struct dentry
*dentry
,
2218 struct iattr
*sattr
)
2220 struct nfs4_exception exception
= { };
2223 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2224 _nfs4_proc_mkdir(dir
, dentry
, sattr
),
2226 } while (exception
.retry
);
2230 static int _nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2231 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2233 struct inode
*dir
= dentry
->d_inode
;
2234 struct nfs4_readdir_arg args
= {
2239 .bitmask
= NFS_SERVER(dentry
->d_inode
)->attr_bitmask
,
2241 struct nfs4_readdir_res res
;
2242 struct rpc_message msg
= {
2243 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READDIR
],
2250 dprintk("%s: dentry = %s/%s, cookie = %Lu\n", __func__
,
2251 dentry
->d_parent
->d_name
.name
,
2252 dentry
->d_name
.name
,
2253 (unsigned long long)cookie
);
2254 nfs4_setup_readdir(cookie
, NFS_COOKIEVERF(dir
), dentry
, &args
);
2255 res
.pgbase
= args
.pgbase
;
2256 status
= rpc_call_sync(NFS_CLIENT(dir
), &msg
, 0);
2258 memcpy(NFS_COOKIEVERF(dir
), res
.verifier
.data
, NFS4_VERIFIER_SIZE
);
2260 nfs_invalidate_atime(dir
);
2262 dprintk("%s: returns %d\n", __func__
, status
);
2266 static int nfs4_proc_readdir(struct dentry
*dentry
, struct rpc_cred
*cred
,
2267 u64 cookie
, struct page
*page
, unsigned int count
, int plus
)
2269 struct nfs4_exception exception
= { };
2272 err
= nfs4_handle_exception(NFS_SERVER(dentry
->d_inode
),
2273 _nfs4_proc_readdir(dentry
, cred
, cookie
,
2276 } while (exception
.retry
);
2280 static int _nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2281 struct iattr
*sattr
, dev_t rdev
)
2283 struct nfs4_createdata
*data
;
2284 int mode
= sattr
->ia_mode
;
2285 int status
= -ENOMEM
;
2287 BUG_ON(!(sattr
->ia_valid
& ATTR_MODE
));
2288 BUG_ON(!S_ISFIFO(mode
) && !S_ISBLK(mode
) && !S_ISCHR(mode
) && !S_ISSOCK(mode
));
2290 data
= nfs4_alloc_createdata(dir
, &dentry
->d_name
, sattr
, NF4SOCK
);
2295 data
->arg
.ftype
= NF4FIFO
;
2296 else if (S_ISBLK(mode
)) {
2297 data
->arg
.ftype
= NF4BLK
;
2298 data
->arg
.u
.device
.specdata1
= MAJOR(rdev
);
2299 data
->arg
.u
.device
.specdata2
= MINOR(rdev
);
2301 else if (S_ISCHR(mode
)) {
2302 data
->arg
.ftype
= NF4CHR
;
2303 data
->arg
.u
.device
.specdata1
= MAJOR(rdev
);
2304 data
->arg
.u
.device
.specdata2
= MINOR(rdev
);
2307 status
= nfs4_do_create(dir
, dentry
, data
);
2309 nfs4_free_createdata(data
);
2314 static int nfs4_proc_mknod(struct inode
*dir
, struct dentry
*dentry
,
2315 struct iattr
*sattr
, dev_t rdev
)
2317 struct nfs4_exception exception
= { };
2320 err
= nfs4_handle_exception(NFS_SERVER(dir
),
2321 _nfs4_proc_mknod(dir
, dentry
, sattr
, rdev
),
2323 } while (exception
.retry
);
2327 static int _nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2328 struct nfs_fsstat
*fsstat
)
2330 struct nfs4_statfs_arg args
= {
2332 .bitmask
= server
->attr_bitmask
,
2334 struct rpc_message msg
= {
2335 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_STATFS
],
2340 nfs_fattr_init(fsstat
->fattr
);
2341 return rpc_call_sync(server
->client
, &msg
, 0);
2344 static int nfs4_proc_statfs(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsstat
*fsstat
)
2346 struct nfs4_exception exception
= { };
2349 err
= nfs4_handle_exception(server
,
2350 _nfs4_proc_statfs(server
, fhandle
, fsstat
),
2352 } while (exception
.retry
);
2356 static int _nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2357 struct nfs_fsinfo
*fsinfo
)
2359 struct nfs4_fsinfo_arg args
= {
2361 .bitmask
= server
->attr_bitmask
,
2363 struct rpc_message msg
= {
2364 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FSINFO
],
2369 return rpc_call_sync(server
->client
, &msg
, 0);
2372 static int nfs4_do_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2374 struct nfs4_exception exception
= { };
2378 err
= nfs4_handle_exception(server
,
2379 _nfs4_do_fsinfo(server
, fhandle
, fsinfo
),
2381 } while (exception
.retry
);
2385 static int nfs4_proc_fsinfo(struct nfs_server
*server
, struct nfs_fh
*fhandle
, struct nfs_fsinfo
*fsinfo
)
2387 nfs_fattr_init(fsinfo
->fattr
);
2388 return nfs4_do_fsinfo(server
, fhandle
, fsinfo
);
2391 static int _nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2392 struct nfs_pathconf
*pathconf
)
2394 struct nfs4_pathconf_arg args
= {
2396 .bitmask
= server
->attr_bitmask
,
2398 struct rpc_message msg
= {
2399 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_PATHCONF
],
2401 .rpc_resp
= pathconf
,
2404 /* None of the pathconf attributes are mandatory to implement */
2405 if ((args
.bitmask
[0] & nfs4_pathconf_bitmap
[0]) == 0) {
2406 memset(pathconf
, 0, sizeof(*pathconf
));
2410 nfs_fattr_init(pathconf
->fattr
);
2411 return rpc_call_sync(server
->client
, &msg
, 0);
2414 static int nfs4_proc_pathconf(struct nfs_server
*server
, struct nfs_fh
*fhandle
,
2415 struct nfs_pathconf
*pathconf
)
2417 struct nfs4_exception exception
= { };
2421 err
= nfs4_handle_exception(server
,
2422 _nfs4_proc_pathconf(server
, fhandle
, pathconf
),
2424 } while (exception
.retry
);
2428 static int nfs4_read_done(struct rpc_task
*task
, struct nfs_read_data
*data
)
2430 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2432 if (nfs4_async_handle_error(task
, server
) == -EAGAIN
) {
2433 rpc_restart_call(task
);
2437 nfs_invalidate_atime(data
->inode
);
2438 if (task
->tk_status
> 0)
2439 renew_lease(server
, data
->timestamp
);
2443 static void nfs4_proc_read_setup(struct nfs_read_data
*data
, struct rpc_message
*msg
)
2445 data
->timestamp
= jiffies
;
2446 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_READ
];
2449 static int nfs4_write_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
2451 struct inode
*inode
= data
->inode
;
2453 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
)) == -EAGAIN
) {
2454 rpc_restart_call(task
);
2457 if (task
->tk_status
>= 0) {
2458 renew_lease(NFS_SERVER(inode
), data
->timestamp
);
2459 nfs_post_op_update_inode_force_wcc(inode
, data
->res
.fattr
);
2464 static void nfs4_proc_write_setup(struct nfs_write_data
*data
, struct rpc_message
*msg
)
2466 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2468 data
->args
.bitmask
= server
->attr_bitmask
;
2469 data
->res
.server
= server
;
2470 data
->timestamp
= jiffies
;
2472 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_WRITE
];
2475 static int nfs4_commit_done(struct rpc_task
*task
, struct nfs_write_data
*data
)
2477 struct inode
*inode
= data
->inode
;
2479 if (nfs4_async_handle_error(task
, NFS_SERVER(inode
)) == -EAGAIN
) {
2480 rpc_restart_call(task
);
2483 nfs_refresh_inode(inode
, data
->res
.fattr
);
2487 static void nfs4_proc_commit_setup(struct nfs_write_data
*data
, struct rpc_message
*msg
)
2489 struct nfs_server
*server
= NFS_SERVER(data
->inode
);
2491 data
->args
.bitmask
= server
->attr_bitmask
;
2492 data
->res
.server
= server
;
2493 msg
->rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_COMMIT
];
2497 * nfs4_proc_async_renew(): This is not one of the nfs_rpc_ops; it is a special
2498 * standalone procedure for queueing an asynchronous RENEW.
2500 static void nfs4_renew_done(struct rpc_task
*task
, void *data
)
2502 struct nfs_client
*clp
= (struct nfs_client
*)task
->tk_msg
.rpc_argp
;
2503 unsigned long timestamp
= (unsigned long)data
;
2505 if (task
->tk_status
< 0) {
2506 switch (task
->tk_status
) {
2507 case -NFS4ERR_STALE_CLIENTID
:
2508 case -NFS4ERR_EXPIRED
:
2509 case -NFS4ERR_CB_PATH_DOWN
:
2510 nfs4_schedule_state_recovery(clp
);
2514 spin_lock(&clp
->cl_lock
);
2515 if (time_before(clp
->cl_last_renewal
,timestamp
))
2516 clp
->cl_last_renewal
= timestamp
;
2517 spin_unlock(&clp
->cl_lock
);
2520 static const struct rpc_call_ops nfs4_renew_ops
= {
2521 .rpc_call_done
= nfs4_renew_done
,
2524 int nfs4_proc_async_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2526 struct rpc_message msg
= {
2527 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2532 return rpc_call_async(clp
->cl_rpcclient
, &msg
, RPC_TASK_SOFT
,
2533 &nfs4_renew_ops
, (void *)jiffies
);
2536 int nfs4_proc_renew(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2538 struct rpc_message msg
= {
2539 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_RENEW
],
2543 unsigned long now
= jiffies
;
2546 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2549 spin_lock(&clp
->cl_lock
);
2550 if (time_before(clp
->cl_last_renewal
,now
))
2551 clp
->cl_last_renewal
= now
;
2552 spin_unlock(&clp
->cl_lock
);
2556 static inline int nfs4_server_supports_acls(struct nfs_server
*server
)
2558 return (server
->caps
& NFS_CAP_ACLS
)
2559 && (server
->acl_bitmask
& ACL4_SUPPORT_ALLOW_ACL
)
2560 && (server
->acl_bitmask
& ACL4_SUPPORT_DENY_ACL
);
2563 /* Assuming that XATTR_SIZE_MAX is a multiple of PAGE_CACHE_SIZE, and that
2564 * it's OK to put sizeof(void) * (XATTR_SIZE_MAX/PAGE_CACHE_SIZE) bytes on
2567 #define NFS4ACL_MAXPAGES (XATTR_SIZE_MAX >> PAGE_CACHE_SHIFT)
2569 static void buf_to_pages(const void *buf
, size_t buflen
,
2570 struct page
**pages
, unsigned int *pgbase
)
2572 const void *p
= buf
;
2574 *pgbase
= offset_in_page(buf
);
2576 while (p
< buf
+ buflen
) {
2577 *(pages
++) = virt_to_page(p
);
2578 p
+= PAGE_CACHE_SIZE
;
2582 struct nfs4_cached_acl
{
2588 static void nfs4_set_cached_acl(struct inode
*inode
, struct nfs4_cached_acl
*acl
)
2590 struct nfs_inode
*nfsi
= NFS_I(inode
);
2592 spin_lock(&inode
->i_lock
);
2593 kfree(nfsi
->nfs4_acl
);
2594 nfsi
->nfs4_acl
= acl
;
2595 spin_unlock(&inode
->i_lock
);
2598 static void nfs4_zap_acl_attr(struct inode
*inode
)
2600 nfs4_set_cached_acl(inode
, NULL
);
2603 static inline ssize_t
nfs4_read_cached_acl(struct inode
*inode
, char *buf
, size_t buflen
)
2605 struct nfs_inode
*nfsi
= NFS_I(inode
);
2606 struct nfs4_cached_acl
*acl
;
2609 spin_lock(&inode
->i_lock
);
2610 acl
= nfsi
->nfs4_acl
;
2613 if (buf
== NULL
) /* user is just asking for length */
2615 if (acl
->cached
== 0)
2617 ret
= -ERANGE
; /* see getxattr(2) man page */
2618 if (acl
->len
> buflen
)
2620 memcpy(buf
, acl
->data
, acl
->len
);
2624 spin_unlock(&inode
->i_lock
);
2628 static void nfs4_write_cached_acl(struct inode
*inode
, const char *buf
, size_t acl_len
)
2630 struct nfs4_cached_acl
*acl
;
2632 if (buf
&& acl_len
<= PAGE_SIZE
) {
2633 acl
= kmalloc(sizeof(*acl
) + acl_len
, GFP_KERNEL
);
2637 memcpy(acl
->data
, buf
, acl_len
);
2639 acl
= kmalloc(sizeof(*acl
), GFP_KERNEL
);
2646 nfs4_set_cached_acl(inode
, acl
);
2649 static ssize_t
__nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
2651 struct page
*pages
[NFS4ACL_MAXPAGES
];
2652 struct nfs_getaclargs args
= {
2653 .fh
= NFS_FH(inode
),
2657 size_t resp_len
= buflen
;
2659 struct rpc_message msg
= {
2660 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_GETACL
],
2662 .rpc_resp
= &resp_len
,
2664 struct page
*localpage
= NULL
;
2667 if (buflen
< PAGE_SIZE
) {
2668 /* As long as we're doing a round trip to the server anyway,
2669 * let's be prepared for a page of acl data. */
2670 localpage
= alloc_page(GFP_KERNEL
);
2671 resp_buf
= page_address(localpage
);
2672 if (localpage
== NULL
)
2674 args
.acl_pages
[0] = localpage
;
2675 args
.acl_pgbase
= 0;
2676 resp_len
= args
.acl_len
= PAGE_SIZE
;
2679 buf_to_pages(buf
, buflen
, args
.acl_pages
, &args
.acl_pgbase
);
2681 ret
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
2684 if (resp_len
> args
.acl_len
)
2685 nfs4_write_cached_acl(inode
, NULL
, resp_len
);
2687 nfs4_write_cached_acl(inode
, resp_buf
, resp_len
);
2690 if (resp_len
> buflen
)
2693 memcpy(buf
, resp_buf
, resp_len
);
2698 __free_page(localpage
);
2702 static ssize_t
nfs4_get_acl_uncached(struct inode
*inode
, void *buf
, size_t buflen
)
2704 struct nfs4_exception exception
= { };
2707 ret
= __nfs4_get_acl_uncached(inode
, buf
, buflen
);
2710 ret
= nfs4_handle_exception(NFS_SERVER(inode
), ret
, &exception
);
2711 } while (exception
.retry
);
2715 static ssize_t
nfs4_proc_get_acl(struct inode
*inode
, void *buf
, size_t buflen
)
2717 struct nfs_server
*server
= NFS_SERVER(inode
);
2720 if (!nfs4_server_supports_acls(server
))
2722 ret
= nfs_revalidate_inode(server
, inode
);
2725 if (NFS_I(inode
)->cache_validity
& NFS_INO_INVALID_ACL
)
2726 nfs_zap_acl_cache(inode
);
2727 ret
= nfs4_read_cached_acl(inode
, buf
, buflen
);
2730 return nfs4_get_acl_uncached(inode
, buf
, buflen
);
2733 static int __nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
2735 struct nfs_server
*server
= NFS_SERVER(inode
);
2736 struct page
*pages
[NFS4ACL_MAXPAGES
];
2737 struct nfs_setaclargs arg
= {
2738 .fh
= NFS_FH(inode
),
2742 struct rpc_message msg
= {
2743 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETACL
],
2749 if (!nfs4_server_supports_acls(server
))
2751 nfs_inode_return_delegation(inode
);
2752 buf_to_pages(buf
, buflen
, arg
.acl_pages
, &arg
.acl_pgbase
);
2753 ret
= rpc_call_sync(NFS_CLIENT(inode
), &msg
, 0);
2754 nfs_access_zap_cache(inode
);
2755 nfs_zap_acl_cache(inode
);
2759 static int nfs4_proc_set_acl(struct inode
*inode
, const void *buf
, size_t buflen
)
2761 struct nfs4_exception exception
= { };
2764 err
= nfs4_handle_exception(NFS_SERVER(inode
),
2765 __nfs4_proc_set_acl(inode
, buf
, buflen
),
2767 } while (exception
.retry
);
2772 nfs4_async_handle_error(struct rpc_task
*task
, const struct nfs_server
*server
)
2774 struct nfs_client
*clp
= server
->nfs_client
;
2776 if (!clp
|| task
->tk_status
>= 0)
2778 switch(task
->tk_status
) {
2779 case -NFS4ERR_STALE_CLIENTID
:
2780 case -NFS4ERR_STALE_STATEID
:
2781 case -NFS4ERR_EXPIRED
:
2782 rpc_sleep_on(&clp
->cl_rpcwaitq
, task
, NULL
);
2783 nfs4_schedule_state_recovery(clp
);
2784 if (test_bit(NFS4CLNT_STATE_RECOVER
, &clp
->cl_state
) == 0)
2785 rpc_wake_up_queued_task(&clp
->cl_rpcwaitq
, task
);
2786 task
->tk_status
= 0;
2788 case -NFS4ERR_DELAY
:
2789 nfs_inc_server_stats(server
, NFSIOS_DELAY
);
2790 case -NFS4ERR_GRACE
:
2791 rpc_delay(task
, NFS4_POLL_RETRY_MAX
);
2792 task
->tk_status
= 0;
2794 case -NFS4ERR_OLD_STATEID
:
2795 task
->tk_status
= 0;
2798 task
->tk_status
= nfs4_map_errors(task
->tk_status
);
2802 static int nfs4_wait_bit_killable(void *word
)
2804 if (fatal_signal_pending(current
))
2805 return -ERESTARTSYS
;
2810 static int nfs4_wait_clnt_recover(struct rpc_clnt
*clnt
, struct nfs_client
*clp
)
2816 rwsem_acquire(&clp
->cl_sem
.dep_map
, 0, 0, _RET_IP_
);
2818 res
= wait_on_bit(&clp
->cl_state
, NFS4CLNT_STATE_RECOVER
,
2819 nfs4_wait_bit_killable
, TASK_KILLABLE
);
2821 rwsem_release(&clp
->cl_sem
.dep_map
, 1, _RET_IP_
);
2825 static int nfs4_delay(struct rpc_clnt
*clnt
, long *timeout
)
2832 *timeout
= NFS4_POLL_RETRY_MIN
;
2833 if (*timeout
> NFS4_POLL_RETRY_MAX
)
2834 *timeout
= NFS4_POLL_RETRY_MAX
;
2835 schedule_timeout_killable(*timeout
);
2836 if (fatal_signal_pending(current
))
2842 /* This is the error handling routine for processes that are allowed
2845 static int nfs4_handle_exception(const struct nfs_server
*server
, int errorcode
, struct nfs4_exception
*exception
)
2847 struct nfs_client
*clp
= server
->nfs_client
;
2848 int ret
= errorcode
;
2850 exception
->retry
= 0;
2854 case -NFS4ERR_STALE_CLIENTID
:
2855 case -NFS4ERR_STALE_STATEID
:
2856 case -NFS4ERR_EXPIRED
:
2857 nfs4_schedule_state_recovery(clp
);
2858 ret
= nfs4_wait_clnt_recover(server
->client
, clp
);
2860 exception
->retry
= 1;
2862 case -NFS4ERR_FILE_OPEN
:
2863 case -NFS4ERR_GRACE
:
2864 case -NFS4ERR_DELAY
:
2865 ret
= nfs4_delay(server
->client
, &exception
->timeout
);
2868 case -NFS4ERR_OLD_STATEID
:
2869 exception
->retry
= 1;
2871 /* We failed to handle the error */
2872 return nfs4_map_errors(ret
);
2875 int nfs4_proc_setclientid(struct nfs_client
*clp
, u32 program
, unsigned short port
, struct rpc_cred
*cred
)
2877 nfs4_verifier sc_verifier
;
2878 struct nfs4_setclientid setclientid
= {
2879 .sc_verifier
= &sc_verifier
,
2882 struct rpc_message msg
= {
2883 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID
],
2884 .rpc_argp
= &setclientid
,
2892 p
= (__be32
*)sc_verifier
.data
;
2893 *p
++ = htonl((u32
)clp
->cl_boot_time
.tv_sec
);
2894 *p
= htonl((u32
)clp
->cl_boot_time
.tv_nsec
);
2897 setclientid
.sc_name_len
= scnprintf(setclientid
.sc_name
,
2898 sizeof(setclientid
.sc_name
), "%s/%s %s %s %u",
2900 rpc_peeraddr2str(clp
->cl_rpcclient
,
2902 rpc_peeraddr2str(clp
->cl_rpcclient
,
2904 clp
->cl_rpcclient
->cl_auth
->au_ops
->au_name
,
2905 clp
->cl_id_uniquifier
);
2906 setclientid
.sc_netid_len
= scnprintf(setclientid
.sc_netid
,
2907 sizeof(setclientid
.sc_netid
),
2908 rpc_peeraddr2str(clp
->cl_rpcclient
,
2909 RPC_DISPLAY_NETID
));
2910 setclientid
.sc_uaddr_len
= scnprintf(setclientid
.sc_uaddr
,
2911 sizeof(setclientid
.sc_uaddr
), "%s.%u.%u",
2912 clp
->cl_ipaddr
, port
>> 8, port
& 255);
2914 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2915 if (status
!= -NFS4ERR_CLID_INUSE
)
2920 ssleep(clp
->cl_lease_time
+ 1);
2922 if (++clp
->cl_id_uniquifier
== 0)
2928 static int _nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2930 struct nfs_fsinfo fsinfo
;
2931 struct rpc_message msg
= {
2932 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_SETCLIENTID_CONFIRM
],
2934 .rpc_resp
= &fsinfo
,
2941 status
= rpc_call_sync(clp
->cl_rpcclient
, &msg
, 0);
2943 spin_lock(&clp
->cl_lock
);
2944 clp
->cl_lease_time
= fsinfo
.lease_time
* HZ
;
2945 clp
->cl_last_renewal
= now
;
2946 spin_unlock(&clp
->cl_lock
);
2951 int nfs4_proc_setclientid_confirm(struct nfs_client
*clp
, struct rpc_cred
*cred
)
2956 err
= _nfs4_proc_setclientid_confirm(clp
, cred
);
2960 case -NFS4ERR_RESOURCE
:
2961 /* The IBM lawyers misread another document! */
2962 case -NFS4ERR_DELAY
:
2963 err
= nfs4_delay(clp
->cl_rpcclient
, &timeout
);
2969 struct nfs4_delegreturndata
{
2970 struct nfs4_delegreturnargs args
;
2971 struct nfs4_delegreturnres res
;
2973 nfs4_stateid stateid
;
2974 unsigned long timestamp
;
2975 struct nfs_fattr fattr
;
2979 static void nfs4_delegreturn_done(struct rpc_task
*task
, void *calldata
)
2981 struct nfs4_delegreturndata
*data
= calldata
;
2982 data
->rpc_status
= task
->tk_status
;
2983 if (data
->rpc_status
== 0)
2984 renew_lease(data
->res
.server
, data
->timestamp
);
2987 static void nfs4_delegreturn_release(void *calldata
)
2992 static const struct rpc_call_ops nfs4_delegreturn_ops
= {
2993 .rpc_call_done
= nfs4_delegreturn_done
,
2994 .rpc_release
= nfs4_delegreturn_release
,
2997 static int _nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
, int issync
)
2999 struct nfs4_delegreturndata
*data
;
3000 struct nfs_server
*server
= NFS_SERVER(inode
);
3001 struct rpc_task
*task
;
3002 struct rpc_message msg
= {
3003 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_DELEGRETURN
],
3006 struct rpc_task_setup task_setup_data
= {
3007 .rpc_client
= server
->client
,
3008 .rpc_message
= &msg
,
3009 .callback_ops
= &nfs4_delegreturn_ops
,
3010 .flags
= RPC_TASK_ASYNC
,
3014 data
= kmalloc(sizeof(*data
), GFP_KERNEL
);
3017 data
->args
.fhandle
= &data
->fh
;
3018 data
->args
.stateid
= &data
->stateid
;
3019 data
->args
.bitmask
= server
->attr_bitmask
;
3020 nfs_copy_fh(&data
->fh
, NFS_FH(inode
));
3021 memcpy(&data
->stateid
, stateid
, sizeof(data
->stateid
));
3022 data
->res
.fattr
= &data
->fattr
;
3023 data
->res
.server
= server
;
3024 nfs_fattr_init(data
->res
.fattr
);
3025 data
->timestamp
= jiffies
;
3026 data
->rpc_status
= 0;
3028 task_setup_data
.callback_data
= data
;
3029 msg
.rpc_argp
= &data
->args
,
3030 msg
.rpc_resp
= &data
->res
,
3031 task
= rpc_run_task(&task_setup_data
);
3033 return PTR_ERR(task
);
3036 status
= nfs4_wait_for_completion_rpc_task(task
);
3039 status
= data
->rpc_status
;
3042 nfs_refresh_inode(inode
, &data
->fattr
);
3048 int nfs4_proc_delegreturn(struct inode
*inode
, struct rpc_cred
*cred
, const nfs4_stateid
*stateid
, int issync
)
3050 struct nfs_server
*server
= NFS_SERVER(inode
);
3051 struct nfs4_exception exception
= { };
3054 err
= _nfs4_proc_delegreturn(inode
, cred
, stateid
, issync
);
3056 case -NFS4ERR_STALE_STATEID
:
3057 case -NFS4ERR_EXPIRED
:
3061 err
= nfs4_handle_exception(server
, err
, &exception
);
3062 } while (exception
.retry
);
3066 #define NFS4_LOCK_MINTIMEOUT (1 * HZ)
3067 #define NFS4_LOCK_MAXTIMEOUT (30 * HZ)
3070 * sleep, with exponential backoff, and retry the LOCK operation.
3072 static unsigned long
3073 nfs4_set_lock_task_retry(unsigned long timeout
)
3075 schedule_timeout_killable(timeout
);
3077 if (timeout
> NFS4_LOCK_MAXTIMEOUT
)
3078 return NFS4_LOCK_MAXTIMEOUT
;
3082 static int _nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3084 struct inode
*inode
= state
->inode
;
3085 struct nfs_server
*server
= NFS_SERVER(inode
);
3086 struct nfs_client
*clp
= server
->nfs_client
;
3087 struct nfs_lockt_args arg
= {
3088 .fh
= NFS_FH(inode
),
3091 struct nfs_lockt_res res
= {
3094 struct rpc_message msg
= {
3095 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKT
],
3098 .rpc_cred
= state
->owner
->so_cred
,
3100 struct nfs4_lock_state
*lsp
;
3103 down_read(&clp
->cl_sem
);
3104 arg
.lock_owner
.clientid
= clp
->cl_clientid
;
3105 status
= nfs4_set_lock_state(state
, request
);
3108 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3109 arg
.lock_owner
.id
= lsp
->ls_id
.id
;
3110 status
= rpc_call_sync(server
->client
, &msg
, 0);
3113 request
->fl_type
= F_UNLCK
;
3115 case -NFS4ERR_DENIED
:
3118 request
->fl_ops
->fl_release_private(request
);
3120 up_read(&clp
->cl_sem
);
3124 static int nfs4_proc_getlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3126 struct nfs4_exception exception
= { };
3130 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3131 _nfs4_proc_getlk(state
, cmd
, request
),
3133 } while (exception
.retry
);
3137 static int do_vfs_lock(struct file
*file
, struct file_lock
*fl
)
3140 switch (fl
->fl_flags
& (FL_POSIX
|FL_FLOCK
)) {
3142 res
= posix_lock_file_wait(file
, fl
);
3145 res
= flock_lock_file_wait(file
, fl
);
3153 struct nfs4_unlockdata
{
3154 struct nfs_locku_args arg
;
3155 struct nfs_locku_res res
;
3156 struct nfs4_lock_state
*lsp
;
3157 struct nfs_open_context
*ctx
;
3158 struct file_lock fl
;
3159 const struct nfs_server
*server
;
3160 unsigned long timestamp
;
3163 static struct nfs4_unlockdata
*nfs4_alloc_unlockdata(struct file_lock
*fl
,
3164 struct nfs_open_context
*ctx
,
3165 struct nfs4_lock_state
*lsp
,
3166 struct nfs_seqid
*seqid
)
3168 struct nfs4_unlockdata
*p
;
3169 struct inode
*inode
= lsp
->ls_state
->inode
;
3171 p
= kmalloc(sizeof(*p
), GFP_KERNEL
);
3174 p
->arg
.fh
= NFS_FH(inode
);
3176 p
->arg
.seqid
= seqid
;
3177 p
->res
.seqid
= seqid
;
3178 p
->arg
.stateid
= &lsp
->ls_stateid
;
3180 atomic_inc(&lsp
->ls_count
);
3181 /* Ensure we don't close file until we're done freeing locks! */
3182 p
->ctx
= get_nfs_open_context(ctx
);
3183 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3184 p
->server
= NFS_SERVER(inode
);
3188 static void nfs4_locku_release_calldata(void *data
)
3190 struct nfs4_unlockdata
*calldata
= data
;
3191 nfs_free_seqid(calldata
->arg
.seqid
);
3192 nfs4_put_lock_state(calldata
->lsp
);
3193 put_nfs_open_context(calldata
->ctx
);
3197 static void nfs4_locku_done(struct rpc_task
*task
, void *data
)
3199 struct nfs4_unlockdata
*calldata
= data
;
3201 if (RPC_ASSASSINATED(task
))
3203 switch (task
->tk_status
) {
3205 memcpy(calldata
->lsp
->ls_stateid
.data
,
3206 calldata
->res
.stateid
.data
,
3207 sizeof(calldata
->lsp
->ls_stateid
.data
));
3208 renew_lease(calldata
->server
, calldata
->timestamp
);
3210 case -NFS4ERR_STALE_STATEID
:
3211 case -NFS4ERR_EXPIRED
:
3214 if (nfs4_async_handle_error(task
, calldata
->server
) == -EAGAIN
)
3215 rpc_restart_call(task
);
3219 static void nfs4_locku_prepare(struct rpc_task
*task
, void *data
)
3221 struct nfs4_unlockdata
*calldata
= data
;
3223 if (nfs_wait_on_sequence(calldata
->arg
.seqid
, task
) != 0)
3225 if ((calldata
->lsp
->ls_flags
& NFS_LOCK_INITIALIZED
) == 0) {
3226 /* Note: exit _without_ running nfs4_locku_done */
3227 task
->tk_action
= NULL
;
3230 calldata
->timestamp
= jiffies
;
3231 rpc_call_start(task
);
3234 static const struct rpc_call_ops nfs4_locku_ops
= {
3235 .rpc_call_prepare
= nfs4_locku_prepare
,
3236 .rpc_call_done
= nfs4_locku_done
,
3237 .rpc_release
= nfs4_locku_release_calldata
,
3240 static struct rpc_task
*nfs4_do_unlck(struct file_lock
*fl
,
3241 struct nfs_open_context
*ctx
,
3242 struct nfs4_lock_state
*lsp
,
3243 struct nfs_seqid
*seqid
)
3245 struct nfs4_unlockdata
*data
;
3246 struct rpc_message msg
= {
3247 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCKU
],
3248 .rpc_cred
= ctx
->cred
,
3250 struct rpc_task_setup task_setup_data
= {
3251 .rpc_client
= NFS_CLIENT(lsp
->ls_state
->inode
),
3252 .rpc_message
= &msg
,
3253 .callback_ops
= &nfs4_locku_ops
,
3254 .workqueue
= nfsiod_workqueue
,
3255 .flags
= RPC_TASK_ASYNC
,
3258 /* Ensure this is an unlock - when canceling a lock, the
3259 * canceled lock is passed in, and it won't be an unlock.
3261 fl
->fl_type
= F_UNLCK
;
3263 data
= nfs4_alloc_unlockdata(fl
, ctx
, lsp
, seqid
);
3265 nfs_free_seqid(seqid
);
3266 return ERR_PTR(-ENOMEM
);
3269 msg
.rpc_argp
= &data
->arg
,
3270 msg
.rpc_resp
= &data
->res
,
3271 task_setup_data
.callback_data
= data
;
3272 return rpc_run_task(&task_setup_data
);
3275 static int nfs4_proc_unlck(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3277 struct nfs_seqid
*seqid
;
3278 struct nfs4_lock_state
*lsp
;
3279 struct rpc_task
*task
;
3281 unsigned char fl_flags
= request
->fl_flags
;
3283 status
= nfs4_set_lock_state(state
, request
);
3284 /* Unlock _before_ we do the RPC call */
3285 request
->fl_flags
|= FL_EXISTS
;
3286 if (do_vfs_lock(request
->fl_file
, request
) == -ENOENT
)
3290 /* Is this a delegated lock? */
3291 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
))
3293 lsp
= request
->fl_u
.nfs4_fl
.owner
;
3294 seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3298 task
= nfs4_do_unlck(request
, nfs_file_open_context(request
->fl_file
), lsp
, seqid
);
3299 status
= PTR_ERR(task
);
3302 status
= nfs4_wait_for_completion_rpc_task(task
);
3305 request
->fl_flags
= fl_flags
;
3309 struct nfs4_lockdata
{
3310 struct nfs_lock_args arg
;
3311 struct nfs_lock_res res
;
3312 struct nfs4_lock_state
*lsp
;
3313 struct nfs_open_context
*ctx
;
3314 struct file_lock fl
;
3315 unsigned long timestamp
;
3320 static struct nfs4_lockdata
*nfs4_alloc_lockdata(struct file_lock
*fl
,
3321 struct nfs_open_context
*ctx
, struct nfs4_lock_state
*lsp
)
3323 struct nfs4_lockdata
*p
;
3324 struct inode
*inode
= lsp
->ls_state
->inode
;
3325 struct nfs_server
*server
= NFS_SERVER(inode
);
3327 p
= kzalloc(sizeof(*p
), GFP_KERNEL
);
3331 p
->arg
.fh
= NFS_FH(inode
);
3333 p
->arg
.open_seqid
= nfs_alloc_seqid(&lsp
->ls_state
->owner
->so_seqid
);
3334 if (p
->arg
.open_seqid
== NULL
)
3336 p
->arg
.lock_seqid
= nfs_alloc_seqid(&lsp
->ls_seqid
);
3337 if (p
->arg
.lock_seqid
== NULL
)
3338 goto out_free_seqid
;
3339 p
->arg
.lock_stateid
= &lsp
->ls_stateid
;
3340 p
->arg
.lock_owner
.clientid
= server
->nfs_client
->cl_clientid
;
3341 p
->arg
.lock_owner
.id
= lsp
->ls_id
.id
;
3342 p
->res
.lock_seqid
= p
->arg
.lock_seqid
;
3344 atomic_inc(&lsp
->ls_count
);
3345 p
->ctx
= get_nfs_open_context(ctx
);
3346 memcpy(&p
->fl
, fl
, sizeof(p
->fl
));
3349 nfs_free_seqid(p
->arg
.open_seqid
);
3355 static void nfs4_lock_prepare(struct rpc_task
*task
, void *calldata
)
3357 struct nfs4_lockdata
*data
= calldata
;
3358 struct nfs4_state
*state
= data
->lsp
->ls_state
;
3360 dprintk("%s: begin!\n", __func__
);
3361 if (nfs_wait_on_sequence(data
->arg
.lock_seqid
, task
) != 0)
3363 /* Do we need to do an open_to_lock_owner? */
3364 if (!(data
->arg
.lock_seqid
->sequence
->flags
& NFS_SEQID_CONFIRMED
)) {
3365 if (nfs_wait_on_sequence(data
->arg
.open_seqid
, task
) != 0)
3367 data
->arg
.open_stateid
= &state
->stateid
;
3368 data
->arg
.new_lock_owner
= 1;
3369 data
->res
.open_seqid
= data
->arg
.open_seqid
;
3371 data
->arg
.new_lock_owner
= 0;
3372 data
->timestamp
= jiffies
;
3373 rpc_call_start(task
);
3374 dprintk("%s: done!, ret = %d\n", __func__
, data
->rpc_status
);
3377 static void nfs4_lock_done(struct rpc_task
*task
, void *calldata
)
3379 struct nfs4_lockdata
*data
= calldata
;
3381 dprintk("%s: begin!\n", __func__
);
3383 data
->rpc_status
= task
->tk_status
;
3384 if (RPC_ASSASSINATED(task
))
3386 if (data
->arg
.new_lock_owner
!= 0) {
3387 if (data
->rpc_status
== 0)
3388 nfs_confirm_seqid(&data
->lsp
->ls_seqid
, 0);
3392 if (data
->rpc_status
== 0) {
3393 memcpy(data
->lsp
->ls_stateid
.data
, data
->res
.stateid
.data
,
3394 sizeof(data
->lsp
->ls_stateid
.data
));
3395 data
->lsp
->ls_flags
|= NFS_LOCK_INITIALIZED
;
3396 renew_lease(NFS_SERVER(data
->ctx
->path
.dentry
->d_inode
), data
->timestamp
);
3399 dprintk("%s: done, ret = %d!\n", __func__
, data
->rpc_status
);
3402 static void nfs4_lock_release(void *calldata
)
3404 struct nfs4_lockdata
*data
= calldata
;
3406 dprintk("%s: begin!\n", __func__
);
3407 nfs_free_seqid(data
->arg
.open_seqid
);
3408 if (data
->cancelled
!= 0) {
3409 struct rpc_task
*task
;
3410 task
= nfs4_do_unlck(&data
->fl
, data
->ctx
, data
->lsp
,
3411 data
->arg
.lock_seqid
);
3414 dprintk("%s: cancelling lock!\n", __func__
);
3416 nfs_free_seqid(data
->arg
.lock_seqid
);
3417 nfs4_put_lock_state(data
->lsp
);
3418 put_nfs_open_context(data
->ctx
);
3420 dprintk("%s: done!\n", __func__
);
3423 static const struct rpc_call_ops nfs4_lock_ops
= {
3424 .rpc_call_prepare
= nfs4_lock_prepare
,
3425 .rpc_call_done
= nfs4_lock_done
,
3426 .rpc_release
= nfs4_lock_release
,
3429 static int _nfs4_do_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*fl
, int reclaim
)
3431 struct nfs4_lockdata
*data
;
3432 struct rpc_task
*task
;
3433 struct rpc_message msg
= {
3434 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_LOCK
],
3435 .rpc_cred
= state
->owner
->so_cred
,
3437 struct rpc_task_setup task_setup_data
= {
3438 .rpc_client
= NFS_CLIENT(state
->inode
),
3439 .rpc_message
= &msg
,
3440 .callback_ops
= &nfs4_lock_ops
,
3441 .workqueue
= nfsiod_workqueue
,
3442 .flags
= RPC_TASK_ASYNC
,
3446 dprintk("%s: begin!\n", __func__
);
3447 data
= nfs4_alloc_lockdata(fl
, nfs_file_open_context(fl
->fl_file
),
3448 fl
->fl_u
.nfs4_fl
.owner
);
3452 data
->arg
.block
= 1;
3454 data
->arg
.reclaim
= 1;
3455 msg
.rpc_argp
= &data
->arg
,
3456 msg
.rpc_resp
= &data
->res
,
3457 task_setup_data
.callback_data
= data
;
3458 task
= rpc_run_task(&task_setup_data
);
3460 return PTR_ERR(task
);
3461 ret
= nfs4_wait_for_completion_rpc_task(task
);
3463 ret
= data
->rpc_status
;
3464 if (ret
== -NFS4ERR_DENIED
)
3467 data
->cancelled
= 1;
3469 dprintk("%s: done, ret = %d!\n", __func__
, ret
);
3473 static int nfs4_lock_reclaim(struct nfs4_state
*state
, struct file_lock
*request
)
3475 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3476 struct nfs4_exception exception
= { };
3480 /* Cache the lock if possible... */
3481 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
3483 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 1);
3484 if (err
!= -NFS4ERR_DELAY
)
3486 nfs4_handle_exception(server
, err
, &exception
);
3487 } while (exception
.retry
);
3491 static int nfs4_lock_expired(struct nfs4_state
*state
, struct file_lock
*request
)
3493 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3494 struct nfs4_exception exception
= { };
3497 err
= nfs4_set_lock_state(state
, request
);
3501 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
) != 0)
3503 err
= _nfs4_do_setlk(state
, F_SETLK
, request
, 0);
3504 if (err
!= -NFS4ERR_DELAY
)
3506 nfs4_handle_exception(server
, err
, &exception
);
3507 } while (exception
.retry
);
3511 static int _nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3513 struct nfs_client
*clp
= state
->owner
->so_client
;
3514 unsigned char fl_flags
= request
->fl_flags
;
3517 /* Is this a delegated open? */
3518 status
= nfs4_set_lock_state(state
, request
);
3521 request
->fl_flags
|= FL_ACCESS
;
3522 status
= do_vfs_lock(request
->fl_file
, request
);
3525 down_read(&clp
->cl_sem
);
3526 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
)) {
3527 struct nfs_inode
*nfsi
= NFS_I(state
->inode
);
3528 /* Yes: cache locks! */
3529 down_read(&nfsi
->rwsem
);
3530 /* ...but avoid races with delegation recall... */
3531 if (test_bit(NFS_DELEGATED_STATE
, &state
->flags
)) {
3532 request
->fl_flags
= fl_flags
& ~FL_SLEEP
;
3533 status
= do_vfs_lock(request
->fl_file
, request
);
3534 up_read(&nfsi
->rwsem
);
3537 up_read(&nfsi
->rwsem
);
3539 status
= _nfs4_do_setlk(state
, cmd
, request
, 0);
3542 /* Note: we always want to sleep here! */
3543 request
->fl_flags
= fl_flags
| FL_SLEEP
;
3544 if (do_vfs_lock(request
->fl_file
, request
) < 0)
3545 printk(KERN_WARNING
"%s: VFS is out of sync with lock manager!\n", __func__
);
3547 up_read(&clp
->cl_sem
);
3549 request
->fl_flags
= fl_flags
;
3553 static int nfs4_proc_setlk(struct nfs4_state
*state
, int cmd
, struct file_lock
*request
)
3555 struct nfs4_exception exception
= { };
3559 err
= nfs4_handle_exception(NFS_SERVER(state
->inode
),
3560 _nfs4_proc_setlk(state
, cmd
, request
),
3562 } while (exception
.retry
);
3567 nfs4_proc_lock(struct file
*filp
, int cmd
, struct file_lock
*request
)
3569 struct nfs_open_context
*ctx
;
3570 struct nfs4_state
*state
;
3571 unsigned long timeout
= NFS4_LOCK_MINTIMEOUT
;
3574 /* verify open state */
3575 ctx
= nfs_file_open_context(filp
);
3578 if (request
->fl_start
< 0 || request
->fl_end
< 0)
3582 return nfs4_proc_getlk(state
, F_GETLK
, request
);
3584 if (!(IS_SETLK(cmd
) || IS_SETLKW(cmd
)))
3587 if (request
->fl_type
== F_UNLCK
)
3588 return nfs4_proc_unlck(state
, cmd
, request
);
3591 status
= nfs4_proc_setlk(state
, cmd
, request
);
3592 if ((status
!= -EAGAIN
) || IS_SETLK(cmd
))
3594 timeout
= nfs4_set_lock_task_retry(timeout
);
3595 status
= -ERESTARTSYS
;
3598 } while(status
< 0);
3602 int nfs4_lock_delegation_recall(struct nfs4_state
*state
, struct file_lock
*fl
)
3604 struct nfs_server
*server
= NFS_SERVER(state
->inode
);
3605 struct nfs4_exception exception
= { };
3608 err
= nfs4_set_lock_state(state
, fl
);
3612 err
= _nfs4_do_setlk(state
, F_SETLK
, fl
, 0);
3613 if (err
!= -NFS4ERR_DELAY
)
3615 err
= nfs4_handle_exception(server
, err
, &exception
);
3616 } while (exception
.retry
);
3621 #define XATTR_NAME_NFSV4_ACL "system.nfs4_acl"
3623 int nfs4_setxattr(struct dentry
*dentry
, const char *key
, const void *buf
,
3624 size_t buflen
, int flags
)
3626 struct inode
*inode
= dentry
->d_inode
;
3628 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
3631 return nfs4_proc_set_acl(inode
, buf
, buflen
);
3634 /* The getxattr man page suggests returning -ENODATA for unknown attributes,
3635 * and that's what we'll do for e.g. user attributes that haven't been set.
3636 * But we'll follow ext2/ext3's lead by returning -EOPNOTSUPP for unsupported
3637 * attributes in kernel-managed attribute namespaces. */
3638 ssize_t
nfs4_getxattr(struct dentry
*dentry
, const char *key
, void *buf
,
3641 struct inode
*inode
= dentry
->d_inode
;
3643 if (strcmp(key
, XATTR_NAME_NFSV4_ACL
) != 0)
3646 return nfs4_proc_get_acl(inode
, buf
, buflen
);
3649 ssize_t
nfs4_listxattr(struct dentry
*dentry
, char *buf
, size_t buflen
)
3651 size_t len
= strlen(XATTR_NAME_NFSV4_ACL
) + 1;
3653 if (!nfs4_server_supports_acls(NFS_SERVER(dentry
->d_inode
)))
3655 if (buf
&& buflen
< len
)
3658 memcpy(buf
, XATTR_NAME_NFSV4_ACL
, len
);
3662 int nfs4_proc_fs_locations(struct inode
*dir
, const struct qstr
*name
,
3663 struct nfs4_fs_locations
*fs_locations
, struct page
*page
)
3665 struct nfs_server
*server
= NFS_SERVER(dir
);
3667 [0] = FATTR4_WORD0_FSID
| FATTR4_WORD0_FS_LOCATIONS
,
3668 [1] = FATTR4_WORD1_MOUNTED_ON_FILEID
,
3670 struct nfs4_fs_locations_arg args
= {
3671 .dir_fh
= NFS_FH(dir
),
3676 struct rpc_message msg
= {
3677 .rpc_proc
= &nfs4_procedures
[NFSPROC4_CLNT_FS_LOCATIONS
],
3679 .rpc_resp
= fs_locations
,
3683 dprintk("%s: start\n", __func__
);
3684 nfs_fattr_init(&fs_locations
->fattr
);
3685 fs_locations
->server
= server
;
3686 fs_locations
->nlocations
= 0;
3687 status
= rpc_call_sync(server
->client
, &msg
, 0);
3688 dprintk("%s: returned status = %d\n", __func__
, status
);
3692 struct nfs4_state_recovery_ops nfs4_reboot_recovery_ops
= {
3693 .owner_flag_bit
= NFS_OWNER_RECLAIM_REBOOT
,
3694 .state_flag_bit
= NFS_STATE_RECLAIM_REBOOT
,
3695 .recover_open
= nfs4_open_reclaim
,
3696 .recover_lock
= nfs4_lock_reclaim
,
3699 struct nfs4_state_recovery_ops nfs4_nograce_recovery_ops
= {
3700 .owner_flag_bit
= NFS_OWNER_RECLAIM_NOGRACE
,
3701 .state_flag_bit
= NFS_STATE_RECLAIM_NOGRACE
,
3702 .recover_open
= nfs4_open_expired
,
3703 .recover_lock
= nfs4_lock_expired
,
3706 static const struct inode_operations nfs4_file_inode_operations
= {
3707 .permission
= nfs_permission
,
3708 .getattr
= nfs_getattr
,
3709 .setattr
= nfs_setattr
,
3710 .getxattr
= nfs4_getxattr
,
3711 .setxattr
= nfs4_setxattr
,
3712 .listxattr
= nfs4_listxattr
,
3715 const struct nfs_rpc_ops nfs_v4_clientops
= {
3716 .version
= 4, /* protocol version */
3717 .dentry_ops
= &nfs4_dentry_operations
,
3718 .dir_inode_ops
= &nfs4_dir_inode_operations
,
3719 .file_inode_ops
= &nfs4_file_inode_operations
,
3720 .getroot
= nfs4_proc_get_root
,
3721 .getattr
= nfs4_proc_getattr
,
3722 .setattr
= nfs4_proc_setattr
,
3723 .lookupfh
= nfs4_proc_lookupfh
,
3724 .lookup
= nfs4_proc_lookup
,
3725 .access
= nfs4_proc_access
,
3726 .readlink
= nfs4_proc_readlink
,
3727 .create
= nfs4_proc_create
,
3728 .remove
= nfs4_proc_remove
,
3729 .unlink_setup
= nfs4_proc_unlink_setup
,
3730 .unlink_done
= nfs4_proc_unlink_done
,
3731 .rename
= nfs4_proc_rename
,
3732 .link
= nfs4_proc_link
,
3733 .symlink
= nfs4_proc_symlink
,
3734 .mkdir
= nfs4_proc_mkdir
,
3735 .rmdir
= nfs4_proc_remove
,
3736 .readdir
= nfs4_proc_readdir
,
3737 .mknod
= nfs4_proc_mknod
,
3738 .statfs
= nfs4_proc_statfs
,
3739 .fsinfo
= nfs4_proc_fsinfo
,
3740 .pathconf
= nfs4_proc_pathconf
,
3741 .set_capabilities
= nfs4_server_capabilities
,
3742 .decode_dirent
= nfs4_decode_dirent
,
3743 .read_setup
= nfs4_proc_read_setup
,
3744 .read_done
= nfs4_read_done
,
3745 .write_setup
= nfs4_proc_write_setup
,
3746 .write_done
= nfs4_write_done
,
3747 .commit_setup
= nfs4_proc_commit_setup
,
3748 .commit_done
= nfs4_commit_done
,
3749 .lock
= nfs4_proc_lock
,
3750 .clear_acl_cache
= nfs4_zap_acl_attr
,